Optical element driving mechanism

Abstract

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a fixed assembly, a movable part and a driving assembly, the movable part is configured to be connected with an optical element, and the movable part can move relative to the fixed assembly. The driving assembly is configured to drive the movable part to move relative to the fixed assembly. The fixing assembly includes an accommodating space configured to accommodate the optical element.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an optical element driving mechanism, and more particularly to an optical element driving mechanism capable of stably driving a lens. BACKGROUND

[0002] With the development of technology, many electronic devices (e.g. smart phones) nowadays have the function of taking photos or videos. Through a camera module disposed on the electronic device, the user can operate the electronic device to extract various photos.

[0003] The design of the electronic device nowadays is continuously developing towards miniaturization, so that various elements or structures of the camera module must also be continuously reduced in size to achieve the purpose of miniaturization. Generally speaking, the driving mechanism in the camera module can have a lens carrier configured to carry a lens, and the driving mechanism can have the functions of auto focusing or optical image stabilization. However, the existing driving mechanism can achieve the above-mentioned photo or video taking function, but still cannot meet all needs.

[0004] Therefore, how to design a camera module that can simultaneously perform auto focusing, optical image stabilization and achieve miniaturization is a problem worth discussing and solving nowadays. CONTENT OF THE INVENTION

[0005] In view of the above, the purpose of the present disclosure is to provide an optical element driving mechanism to solve the above problems.

[0006] The present disclosure provides an optical element driving mechanism, comprising a fixed component, a movable part and a driving component. The movable part is configured to connect an optical element, and the movable part can move relative to the fixed component. The driving component is configured to drive the movable part to move relative to the fixed component. The fixed component comprises a containing space configured to accommodate the optical element.

[0007] According to some embodiments of the present disclosure, the fixed assembly has a cover and a base. The cover is fixedly connected to the base along a main axis to form a receiving space. The optical element driving mechanism further includes a guiding assembly configured to guide the movable part to move along a first axis. The first axis is perpendicular to the main axis. The guiding assembly has a first guiding element and a second guiding element extending along the first axis and configured to guide the movable part. The first guiding element and the second guiding element are located at a first side and a second side of the movable part, respectively, when viewed along the main axis. The first guiding element and the second guiding element are arranged along a second axis when viewed along the main axis. The second axis is perpendicular to the first axis. The movable part has a first guiding groove and a second guiding groove configured to receive the first guiding element and the second guiding element, respectively. The first guiding groove has a V-shaped structure and the first guiding element has a circular structure when viewed along the first axis. The second guiding groove has a U-shaped structure and the second guiding element has a circular structure when viewed along the first axis.

[0008] According to some embodiments of the present disclosure, the movable part further has a first contact portion and a second contact portion disposed in the first guiding groove. The first contact portion and the second contact portion are configured to contact the first guiding element. The movable part further has a third contact portion disposed in the second guiding groove. The third contact portion is configured to contact the second guiding element. The first contact portion defines a first contact center, the second contact portion defines a second contact center, and the third contact portion defines a third contact center.

[0009] The first contact center and the third contact center define a first center line that is neither parallel nor perpendicular to the first axis when viewed along the main axis. The first contact center and the second contact center define a second center line that is parallel to the first axis when viewed along the main axis. The third contact center and the second contact center define a third center line that is neither parallel nor perpendicular to the first axis when viewed along the main axis. The first contact center, the second contact center, and the third contact center collectively form a triangle when viewed along the main axis. The triangle is a non-isosceles triangle.

[0010] According to some embodiments of the present disclosure, the driving assembly includes a first magnetic element, a second magnetic element, and a first coil; the first magnetic element and the second magnetic element are disposed on the movable portion and located at the first side; the first coil is disposed on the base and corresponds to the first magnetic element and the second magnetic element; the driving assembly further includes a third magnetic element, a fourth magnetic element, and a second coil; the third magnetic element and the fourth magnetic element are disposed on the movable portion and located at the second side; the second coil is disposed on the base and corresponds to the third magnetic element and the fourth magnetic element; the first guide element and the second guide element are made of magnetically conductive material; the first magnetic element and the second magnetic element are configured to generate a first magnetic attraction force and a second magnetic attraction force with the first guide element, respectively; when viewed along the main shaft, the first magnetic attraction force and the second magnetic attraction force are located on opposite sides of the first contact center; the third magnetic element and the fourth magnetic element are configured to generate a third magnetic attraction force and a fourth magnetic attraction force with the second guide element, respectively; when viewed along the main shaft, the third magnetic attraction force and the fourth magnetic attraction force are located on opposite sides of the third contact center; the projection of the second magnetic attraction force along the second axial direction falls on the second center line; the projection of the first magnetic attraction force along the second axial direction does not fall on the second center line; the second magnetic attraction force is greater than the first magnetic attraction force; the difference between the fourth magnetic attraction force and the third magnetic attraction force is different from the difference between the second magnetic attraction force and the first magnetic attraction force; the difference between the fourth magnetic attraction force and the third magnetic attraction force is smaller than the difference between the second magnetic attraction force and the first magnetic attraction force.

[0011] According to some embodiments of the present disclosure, when viewed along the second axial direction, the size of the first magnetic element is different from the size of the second magnetic element; when viewed along the second axial direction, the size of the second magnetic element is greater than the size of the first magnetic element; when viewed along the second axial direction, the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively; when viewed along the second axial direction, the first magnetic center and the first guide element have a first shortest distance; when viewed along the second axial direction, the second magnetic center and the first guide element have a second shortest distance; the second shortest distance is different from the first shortest distance; the second shortest distance is smaller than the first shortest distance.

[0012] According to some embodiments of the disclosure, when viewed along the second axis, the second magnetic element has a size equal to a size of the first magnetic element; when viewed along the second axis, the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively; when viewed along the second axis, the first magnetic center and the first guide element have a first shortest distance; when viewed along the second axis, the second magnetic center and the first guide element have a second shortest distance; the second shortest distance is different from the first shortest distance; the second shortest distance is less than the first shortest distance; when viewed along the first axis, a portion of the first magnetic element does not overlap a portion of the second magnetic element.

[0013] According to some embodiments of the disclosure, when viewed along the second axis, the second magnetic element has a size equal to a size of the first magnetic element; when viewed along the second axis, the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively; when viewed along the second axis, the first magnetic center and the first guide element have a first shortest distance; when viewed along the second axis, the second magnetic center and the first guide element have a second shortest distance; the second shortest distance is equal to the first shortest distance; when viewed along the main axis, the first magnetic element has a first thickness in the second axis; when viewed along the main axis, the second magnetic element has a second thickness in the second axis; the second thickness is greater than the first thickness.

[0014] According to some embodiments of the disclosure, when viewed along the second axis, the second magnetic element has a size equal to a size of the first magnetic element; when viewed along the second axis, the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively; when viewed along the second axis, the first magnetic center and the first guide element have a first shortest distance; when viewed along the second axis, the second magnetic center and the first guide element have a second shortest distance; the second shortest distance is equal to the first shortest distance; the first guide element has a first section and a second section; the second section is connected to the first section; the first section corresponds to the first magnetic element; the second section corresponds to the second magnetic element; the second section has a magnetic permeability greater than a magnetic permeability of the first section.

[0015] According to some embodiments of the present disclosure, the optical element driving mechanism further comprises a fifth magnetic element and a magnetic conducting plate; the movable part further comprises a first recess configured to accommodate the fifth magnetic element; the magnetic conducting plate is disposed on the base and located between the first side and the second side; the fifth magnetic element is configured to generate a fifth magnetic attraction force with the magnetic conducting plate; when viewed along the main axis, the first recess is closer to the first guide element than the second guide element; when viewed along the main axis, the first recess is closer to the second contact portion than the first contact portion; when viewed along the main axis, the fifth magnetic element is located inside the triangle.

[0016] According to some embodiments of the present disclosure, the third magnetic element is adjacent to the fourth magnetic element at an interface; the interface passes through the third contact center; when viewed along the main axis, the interface passes through a center of gravity of the optical element and the movable part; the optical element driving mechanism further comprises a circuit assembly and a light shielding element; the circuit assembly is disposed on the base; the first coil and the second coil are configured to be electrically connected to the circuit assembly; the light shielding element is disposed between the movable part and the magnetic conducting plate; the light shielding element is made of a material that absorbs light; the optical element driving mechanism further comprises a first sensing element and a sensing magnet; the first sensing element and the sensing magnet are respectively disposed on the circuit assembly and the movable part; the optical element driving mechanism further comprises a protection element disposed between the movable part and the sensing magnet; the protection element is configured to cover a portion of the sensing magnet; when viewed along the main axis, the protection element has an L-shaped structure; the optical element driving mechanism further comprises a first buffer element and a second buffer element disposed on the movable part; the first buffer element and the second buffer element are arranged along the first axis; when the movable part is driven to move to a first limit position, the first buffer element is configured to abut against the base; when the movable part is driven to move to a second limit position, the second buffer element is configured to abut against the base. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present disclosure can be understood more clearly with the following detailed description in conjunction with the accompanying drawings. It is emphasized that various features are not drawn to scale and are for illustrative purposes only. In fact, the dimensions of various features can be arbitrarily enlarged or reduced in order to clearly illustrate.

[0018] Figure 1 A perspective view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0019] Figure 2 An exploded view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0020] Figure 3A cross-sectional view of the optical element driving mechanism according to an embodiment of the present disclosure along Figure 1 A cross-sectional view of the optical element driving mechanism according to an embodiment of the present disclosure along

[0021] Figure 4 A perspective view of a partial structure of the optical element driving mechanism according to an embodiment of the present disclosure from another angle.

[0022] Figure 5 A plan view of a partial structure of the optical element driving mechanism according to an embodiment of the present disclosure.

[0023] Figure 6 A side view of a partial structure of the optical element driving mechanism according to an embodiment of the present disclosure.

[0024] Figure 7A A side view of a partial structure of the optical element driving mechanism according to an embodiment of the present disclosure from another angle.

[0025] Figure 7B A side view of a partial structure of the optical element driving mechanism according to another embodiment of the present disclosure from another angle.

[0026] Figure 8 A side view of a partial structure of the optical element driving mechanism according to another embodiment of the present disclosure.

[0027] Figure 9 A side view of a partial structure of the optical element driving mechanism according to another embodiment of the present disclosure.

[0028] Figure 10 A perspective view of a partial structure of the optical element driving mechanism according to another embodiment of the present disclosure.

[0029] Figure 11 A plan view of a partial structure of the optical element driving mechanism according to an embodiment of the present disclosure.

[0030] Reference signs are as follows:

[0031] 100: optical element driving mechanism

[0032] 102: outer cover

[0033] 108: movable portion

[0034] 112: base

[0035] 114: circuit assembly

[0036] 116: light shielding element

[0037] 120: magnetic conductive plate

[0038] 121: first electrical connection assembly

[0039] 122: second electrical connection component

[0040] 130: protection element

[0041] 141: first buffer element

[0042] 142: second buffer element

[0043] 1131: first guide element

[0044] 1132: second guide element

[0045] AF1: first magnetic attraction force

[0046] AF2: second magnetic attraction force

[0047] AF3: third magnetic attraction force

[0048] AF4: fourth magnetic attraction force

[0049] AF5: fifth magnetic attraction force

[0050] AS1: accommodation space

[0051] AX1: first axial direction

[0052] AX2: second axial direction

[0053] CC1: first contact center

[0054] CC2: second contact center

[0055] CC3: third contact center

[0056] CL1: first coil

[0057] CL2: second coil

[0058] CX1: first center line

[0059] CX2: second center line

[0060] CX3: third center line

[0061] DA: drive assembly

[0062] DC1: first direction

[0063] DC2: second direction

[0064] EP1: first extreme position

[0065] EP2: second extreme position

[0066] FA: fixed assembly

[0067] GA:guide assembly

[0068] MC1:first magnetic center

[0069] MC2:second magnetic center

[0070] MC3:third magnetic center

[0071] MC4:fourth magnetic center

[0072] MDS1:first shortest distance

[0073] MDS2:second shortest distance

[0074] MG11:first magnetic element

[0075] MG12:second magnetic element

[0076] MG21:third magnetic element

[0077] MG22:fourth magnetic element

[0078] MG3:fifth magnetic element

[0079] MGS:sensing magnet

[0080] MX:main axis

[0081] OE:optical element

[0082] OP1:first opening

[0083] RD1:first rotation direction

[0084] RD2:second rotation direction

[0085] RG1:first recess

[0086] SE1:first sensing element

[0087] SG1:first segment

[0088] SG2:second segment

[0089] SS1:first side

[0090] SS2:second side

[0091] WC1:center of gravity

[0092] WT1:first thickness

[0093] WT2:second thickness

[0094] XL1:interface

[0095] X:X-axis

[0096] Y: Y-axis

[0097] Z: Z-axis DETAILED DESCRIPTION

[0098] Many different embodiments of methods or processes are disclosed or suggested herein, and the description of a particular embodiment of a component or arrangement does not limit the scope of the disclosure to that particular embodiment. For example, if the specification states that a first feature element is formed over a second feature element, this can include embodiments where the first feature element is in direct contact with the second feature element, and can also include embodiments where additional feature elements are formed between the first feature element and the second feature element, such that the first feature element is not in direct contact with the second feature element.

[0099] Furthermore, repeated use of reference characters in the present disclosure can be to refer to a particular item, feature, or component that is common to several embodiments or that can be used over and over again in several embodiments. Commonly, the names of particular components, items or features can be used in different embodiments and can be pronounced the same or differently. For example, both of the items 100 and 200 can be referred to as "a widget" in some embodiments. Apparent from this description, then, the names of particular components, items or features that are common to the embodiments are interchangeable and can be used interchangeably to describe an item, feature or component in any particular or all embodiments.

[0100] 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 further 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.

[0101] Furthermore, the use of the terms "first", "second", or the like, in the description and / or in the claims is intended to modify a particular element, but not to imply that the element must have a particular order. Use of the terms "first", "second", or the like, is used to name different elements for ease of identification in the claims and is not intended to imply a sequence or order to the elements.

[0102] Moreover, in some embodiments of the present disclosure, the terms such as "connected", "interconnected" and the like in relation to the joining, connecting, etc., unless specifically stated otherwise, can refer to two structures that are in direct contact, or can also refer to two structures that are not in direct contact with each other, with other structures being provided between the two structures. In addition, the terms in relation to the joining, connecting, etc. can also include the case where both structures can be movable, or the case where both structures are fixed.

[0103] Reference is made to Figures 1 to 3 , Figure 1 a perspective view of an optical element driving mechanism 100 according to an embodiment of the present disclosure, Figure 2 an exploded view of the optical element driving mechanism 100 according to an embodiment of the present disclosure, and Figure 3 a sectional view of the optical element driving mechanism 100 along a middle line segment A-A according to an embodiment of the present disclosure. The optical element driving mechanism 100 can be an optical camera module configured to carry and drive an optical element OE. Figure 1

[0104] The optical element driving mechanism 100 can be mounted on various electronic devices or portable electronic devices, such as a smart phone, for a user to perform image extraction functions. In this embodiment, the optical element driving mechanism 100 is a voice coil motor (VCM) with an auto focus (AF) function, but the present disclosure is not limited thereto. In other embodiments, the optical element driving mechanism 100 can also have an auto focus (AF) and optical image stabilization (OIS) function.

[0105] As shown in Figure 2 , the optical element driving mechanism 100 includes a fixed assembly FA, a movable portion 108, and a driving assembly DA. The movable portion 108 is configured to connect the aforementioned optical element OE, and the movable portion 108 can move relative to the fixed assembly FA. The driving assembly DA is configured to drive the movable portion 108 to move relative to the fixed assembly FA.

[0106] In this embodiment, as shown in Figure 1 and Figure 2 , the fixed assembly FA includes a cover 102 and a base 112, and the cover 102 is fixedly connected to the base 112 along a main axis MX to form a receiving space AS1, thereby accommodating the optical element OE. The cover 102 can have a first opening OP1, and the optical element OE is exposed from the first opening OP1 when viewed along the main axis MX. The optical element OE can be an optical lens, but is not limited thereto.

[0107] ​The optical element driving mechanism 100 can further include a guiding assembly GA configured to guide the movable portion 108 to move along a first axial direction AX1, wherein the first axial direction AX1 is perpendicular to the main axis MX. In particular, the guiding assembly GA can have a first guiding element 1131 and a second guiding element 1132 extending along the first axial direction AX1 and configured to guide the movable portion 108.

[0108] In this embodiment, as shown in FIG. 1, the driving assembly DA can include a first magnetic element MG11, a second magnetic element MG12, and a first coil CL1. The first magnetic element MG11 and the second magnetic element MG12 are fixedly arranged on the movable portion 108, and the first coil CL1 is arranged on the base 112 and corresponds to the first magnetic element MG11 and the second magnetic element MG12. Figure 2 Similarly, the driving assembly DA can further include a third magnetic element MG21, a fourth magnetic element MG22, and a second coil CL2. The third magnetic element MG21 and the fourth magnetic element MG22 are fixedly arranged on the movable portion 108, and the second coil CL2 is arranged on the base 112 and corresponds to the third magnetic element MG21 and the fourth magnetic element MG22.

[0109] In particular, the driving assembly DA can further include a first electrical connection assembly 121 and a second electrical connection assembly 122. The first coil CL1 is arranged on the base 112 through the first electrical connection assembly 121, and the second coil CL2 is arranged on the base 112 through the second electrical connection assembly 122. Furthermore, the optical element driving mechanism 100 can further include a circuit assembly 114 fixedly arranged on the base 112.

[0110] In this embodiment, the circuit assembly 114 can be a printed circuit board, and the first electrical connection assembly 121 and the second electrical connection assembly 122 can be plastic boards in which metal lines can be embedded using insert molding technology to be electrically connected to the circuit assembly 114, but are not limited thereto.

[0111] That is, the first coil CL1 and the second coil CL2 are respectively fixedly arranged on the first electrical connection assembly 121 and the second electrical connection assembly 122 to be electrically connected to the circuit assembly 114 through the first electrical connection assembly 121 and the second electrical connection assembly 122.

[0112]

[0113] ​When the first coil CL1 and the second coil CL2 are energized, the first coil CL1, the first magnetic element MG11, and the second magnetic element MG12 can generate a first electromagnetic driving force, the second coil CL2, the third magnetic element MG21, and the fourth magnetic element MG22 can generate a second electromagnetic driving force, and the first electromagnetic driving force and the second electromagnetic driving force can jointly drive the movable portion 108 and the optical element OE to move back and forth along the first axial direction AX1 to achieve the purpose of auto-focusing.

[0114] In addition, as shown in Figure 2 With Figure 3 respect to the optical element driving mechanism 100, the optical element driving mechanism 100 can further include a first sensing element SE1 and a sensing magnet MGS. The first sensing element SE1 and the sensing magnet MGS are respectively arranged on the circuit assembly 114 and the movable portion 108. The first sensing element SE1 is configured to sense the magnetic field change of the aforementioned sensing magnet MGS to sense the position of the movable portion 108.

[0115] In this embodiment, the first sensing element SE1 is, for example, a Hall sensor or a tunneling magnetoresistive sensor (TMR sensor), but is not limited thereto. Furthermore, in this embodiment, the optical element driving mechanism 100 further includes a protection element 130 arranged between the movable portion 108 and the sensing magnet MGS. The protection element 130 is configured to cover a portion of the sensing magnet MGS.

[0116] As shown in Figure 3 when viewed along the main axis MX, the protection element 130 has an L-shaped structure and is, for example, made of a magnetically conductive material. Based on the configuration of the protection element 130, the aforementioned interference of other magnetic elements (magnets) to the sensing magnet MGS can be avoided to increase the accuracy of position sensing.

[0117] Next, please refer to Figures 1 to 5 , Figure 4 is a perspective view of a partial structure of the optical element driving mechanism 100 according to an embodiment of the present disclosure from another viewing angle, and Figure 5 is a top view of a partial structure of the optical element driving mechanism 100 according to an embodiment of the present disclosure. As shown in Figure 5 when viewed along the main axis MX, the first guide element 1131 and the second guide element 1132 are respectively located at a first side SS1 and a second side SS2 of the movable portion 108.

[0118] When viewed along the main axis MX, the first guide element 1131 and the second guide element 1132 are arranged along a second axial direction AX2, and the second axial direction AX2 is perpendicular to the first axial direction AX1. In this embodiment, as shown in Figure 4 and Figure 5As shown, the movable portion 108 can have a first guide groove 1081 and a second guide groove 1082 configured to accommodate a first guide element 1131 and a second guide element 1132, respectively.

[0119] As shown, the first guide groove 1081 has a V-shaped structure and the first guide element 1131 has a circular structure when viewed along the first axial direction AX1 (Y-axis), but is not limited thereto. The second guide groove 1082 has a U-shaped structure and the second guide element 1132 has a circular structure when viewed along the first axial direction AX1, but is not limited thereto. Figure 3

[0120] As shown, the movable portion 108 can have a first guide groove 1081 and a second guide groove 1082 configured to accommodate a first guide element 1131 and a second guide element 1132, respectively. Figure 4 Figure 5 As shown, the movable portion 108 further has a first contact portion 1083 and a second contact portion 1084 disposed in the first guide groove 1081, and the first contact portion 1083 and the second contact portion 1084 are, for example, protruding structures configured to contact the first guide element 1131.

[0121] Similarly, the movable portion 108 can further have a third contact portion 1085 disposed in the second guide groove 1082, and the third contact portion 1085 is, for example, a protruding structure configured to contact the second guide element 1132.

[0122] As shown, the first contact portion 1083 can define a first contact center CC1, the second contact portion 1084 can define a second contact center CC2, and the third contact portion 1085 can define a third contact center CC3. When viewed along the main axis MX, the first contact center CC1 and the third contact center CC3 can define a first center line CX1, which is neither parallel nor perpendicular to the first axial direction AX1. Figure 5 Further, when viewed along the main axis MX, the first contact center CC1 and the second contact center CC2 define a second center line CX2, which is substantially parallel to the first axial direction AX1. When viewed along the main axis MX, the third contact center CC3 and the second contact center CC2 define a third center line CX3, which is neither parallel nor perpendicular to the first axial direction AX1.

[0123] As shown, when viewed along the main axis MX, the first center line CX1, the second center line CX2, and the third center line CX3 can collectively form a triangle. Notably, this triangle is a non-isosceles triangle. That is, the length of the first center line CX1 is not equal to the length of the third center line CX3.

[0124] Figure 5 Further, as shown,

[0125] Further, as shown, Figure 5 ​​​As shown, the first magnetic element MG11 and the second magnetic element MG12 are located at the first side SS1, and the third magnetic element MG21 and the fourth magnetic element MG22 are located at the second side SS2. It is noted that the first guide element 1131 and the second guide element 1132 are made of a magnetically permeable material.

[0126] Therefore, the first magnetic element MG11 and the second magnetic element MG12 are configured to generate a first magnetic attraction force AF1 and a second magnetic attraction force AF2, respectively, with the first guide element 1131. When viewed along the main axis MX, the first magnetic attraction force AF1 and the second magnetic attraction force AF2 are located at opposite sides of the first contact center CC1.

[0127] Similarly, the third magnetic element MG21 and the fourth magnetic element MG22 are configured to generate a third magnetic attraction force AF3 and a fourth magnetic attraction force AF4, respectively, with the second guide element 1132. When viewed along the main axis MX, the third magnetic attraction force AF3 and the fourth magnetic attraction force AF4 are located at opposite sides of the third contact center CC3.

[0128] It is noted that the projection of the second magnetic attraction force AF2 along the second axial direction AX2 falls on the second center connecting line CX2, while the projection of the first magnetic attraction force AF1 along the second axial direction AX2 does not fall on the second center connecting line CX2, and the second magnetic attraction force AF2 is greater than the first magnetic attraction force AF1.

[0129] Continuing to refer to Figures 5 to 7B . Figure 6 is a side view of a partial structure of an optical element driving mechanism 100 according to an embodiment of the present disclosure, and Figure 7A is a side view of a partial structure of the optical element driving mechanism 100 according to the embodiment of the present disclosure, from another viewing angle, and Figure 7B is a side view of a partial structure of an optical element driving mechanism 100 according to another embodiment of the present disclosure, from another viewing angle.

[0130] As Figure 6 shown, in this embodiment, when viewed along the second axial direction AX2 (X-axis), the size of the first magnetic element MG11 is different from the size of the second magnetic element MG12. Specifically, when viewed along the second axial direction AX2, the size of the second magnetic element MG12 is greater than the size of the first magnetic element MG11.

[0131] The first magnetic element MG11 and the second magnetic element MG12 have a first magnetic center MC1 and a second magnetic center MC2, respectively, when viewed along the second axial direction AX2. The first magnetic center MC1 and the first guide element 1131 have a first minimum distance MDS1 when viewed along the second axial direction AX2, and the second magnetic center MC2 and the first guide element 1131 have a second minimum distance MDS2 when viewed along the second axial direction AX2.

[0132] In this embodiment, the second minimum distance MDS2 is different from the first minimum distance MDS1. Specifically, the second minimum distance MDS2 is smaller than the first minimum distance MDS1. Since the second magnetic element MG12 has a larger size, the second magnetic force AF2 generated thereby is larger than the first magnetic force AF1 generated by the first magnetic element MG11.

[0133] During movement of the movable portion 108 along the first axial direction AX1, the movable portion 108 can rotate about the first center line CX1 or the third center line CX3. For example, when the movable portion 108 moves along a first direction DC1, the movable portion 108 can rotate about the first center line CX1 along a first rotation direction RD1, which can cause the second contact portion 1084 to disengage from the first guide element 1131, thereby affecting the accuracy of movement of the movable portion 108.

[0134] Since the second magnetic force AF2 of this embodiment is larger than the first magnetic force AF1, and the projection of the second magnetic force AF2 falls between the first contact portion 1083 and the second contact portion 1084, i.e., on the second center line CX2 (as shown in Figure 5 Therefore, the torque generated by the second magnetic force AF2 relative to the first contact portion 1083 is larger than the torque generated by the first magnetic force AF1 relative to the first contact portion 1083.

[0135] Thus, the force of the second magnetic force AF2 can be applied to the movable portion 108 as a downward force to prevent the aforementioned rotation of the movable portion 108 about the first center line CX1, thereby increasing the stability and accuracy of movement of the movable portion 108.

[0136] Similarly, as shown in Figure 4 and Figure 5As shown, when the movable part 108 moves along a second direction DC2, it may rotate along a second rotation direction RD2 around a third center line CX3. This could cause the first contact part 1083 to disengage from the first guide element 1131, affecting the accuracy of the movement of the movable part 108. The second direction DC2 is opposite to the first direction DC1, and both the second direction DC2 and the first direction DC1 are parallel to the first axis AX1.

[0137] Similarly, since the second magnetic attraction force AF2 is greater than the first magnetic attraction force AF1, the force of the second magnetic attraction force AF2 can also generate downward pressure to avoid the problem that the aforementioned movable part 108 may rotate around the third center line CX3, thereby increasing the stability and accuracy of the movable part 108 during movement.

[0138] Next, as Figure 5 and Figure 7A As shown, the third magnetic element MG21 is adjacent to the fourth magnetic element MG22 at an interface XL1. The interface XL1 passes through the third contact center CC3, and when viewed along the main axis MX, the interface XL1 passes through the optical element OE and the center of gravity WC1 of the movable part 108. Based on this structural configuration, the stability of the movable part 108 during movement can be increased.

[0139] In addition, such as Figure 7A As shown, the size of the fourth magnetic element MG22 is larger than the size of the third magnetic element MG21, and the fourth magnetic attraction force AF4 is greater than the third magnetic attraction force AF3. It should be noted that the difference in magnetic attraction force between the fourth magnetic attraction force AF4 and the third magnetic attraction force AF3 is different from the difference in magnetic attraction force between the second magnetic attraction force AF2 and the first magnetic attraction force AF1. Specifically, the difference in magnetic attraction force between the fourth magnetic attraction force AF4 and the third magnetic attraction force AF3 is smaller than the difference in magnetic attraction force between the second magnetic attraction force AF2 and the first magnetic attraction force AF1.

[0140] Alternatively, in other embodiments, such as Figure 7B As shown, the size of the fourth magnetic element MG22 is equal to the size of the third magnetic element MG21, and the fourth magnetic attraction force AF4 is equal to the third magnetic attraction force AF3. Therefore, the torque of the fourth magnetic attraction force AF4 relative to the third contact portion 1085 is equal to the torque of the third magnetic attraction force AF3 relative to the third contact portion 1085, so the movable portion 108 will not rotate.

[0141] based on Figure 7A and Figure 7BSuch a structural configuration can further prevent the movable portion 108 from rotating around the first center connecting line CX1 or the third center connecting line CX3.

[0142] Please refer to Figure 8 . Figure 8 FIG. 10 is a side view of a partial structure of an optical element driving mechanism 100 according to another embodiment of the present disclosure. In this embodiment, the size of the second magnetic element MG12 is equal to the size of the first magnetic element MG11 when viewed along the second axial direction AX2. That is, the second magnetic element MG12 and the first magnetic element MG11 have the same area in the YZ plane when viewed along the second axial direction AX2.

[0143] Similarly, the first magnetic element MG11 and the second magnetic element MG12 have a first magnetic center MC1 and a second magnetic center MC2, respectively, when viewed along the second axial direction AX2. The first magnetic center MC1 and the first guide element 1131 have a first minimum distance MDS1 therebetween when viewed along the second axial direction AX2.

[0144] Similarly, the second magnetic center MC2 and the first guide element 1131 have a second minimum distance MDS2 therebetween when viewed along the second axial direction AX2, and the second minimum distance MDS2 is different from the first minimum distance MDS1. Similarly to the foregoing embodiment, the second minimum distance MDS2 is also smaller than the first minimum distance MDS1.

[0145] In addition, a portion of the first magnetic element MG11 does not overlap a portion of the second magnetic element MG12 when viewed along the first axial direction AX1. That is, the first magnetic center MC1 and the second magnetic center MC2 are not located on the same horizontal plane (e.g., the XY plane).

[0146] Therefore, based on such a configuration, since the second magnetic center MC2 is closer to the first guide element 1131 than the first magnetic center MC1, the second magnetic force AF2 is greater than the first magnetic force AF1. Thus, the second magnetic force AF2 of this embodiment can also prevent the movable portion 108 from rotating around the first center connecting line CX1 or the third center connecting line CX3 during movement.

[0147] Please refer to Figure 9 . Figure 9 FIG. 11 is a side view of a partial structure of an optical element driving mechanism 100 according to another embodiment of the present disclosure. In this embodiment, the size of the second magnetic element MG12 is equal to the size of the first magnetic element MG11 when viewed along the second axial direction AX2.

[0148] Similarly, the first magnetic element MG11 and the second magnetic element MG12 have a first magnetic center MC1 and a second magnetic center MC2, respectively, when viewed along the second axial direction AX2, and the first magnetic center MC1 and the first guide element 1131 have a first shortest distance MDS1 when viewed along the second axial direction AX2.

[0149] Similarly, the second magnetic center MC2 and the first guide element 1131 have a second shortest distance MDS2 when viewed along the second axial direction AX2, and the second shortest distance MDS2 is equal to the first shortest distance MDS1.

[0150] It is worth mentioning that in this embodiment, the first guide element 1131 can have a first segment SG1 and a second segment SG2, and the second segment SG2 is connected to the first segment SG1. The first segment SG1 corresponds to the first magnetic element MG11, and the second segment SG2 corresponds to the second magnetic element MG12. The lengths of the first segment SG1 and the second segment SG2 can be equal or unequal.

[0151] Among them, the permeability of the second segment SG2 is greater than the permeability of the first segment SG1. Based on such a configuration, although the second magnetic element MG12 and the first magnetic element MG11 have the same size and material, the second magnetic attraction force AF2 generated by the second magnetic element MG12 will still be greater than the first magnetic attraction force AF1 generated by the first magnetic element MG11.

[0152] Therefore, the second magnetic attraction force AF2 of this embodiment can also avoid the problem of rotating the first center connecting line CX1 or the third center connecting line CX3 during the movement of the moving part 108.

[0153] Please refer to Figure 10 . Figure 10 is a perspective view of a partial structure of an optical element driving mechanism 100 according to another embodiment of the present disclosure. In this embodiment, the size of the second magnetic element MG12 is equal to the size of the first magnetic element MG11 when viewed along the second axial direction AX2. That is, the second magnetic element MG12 and the first magnetic element MG11 have the same area on the YZ plane.

[0154] Similarly, the first magnetic element MG11 and the second magnetic element MG12 have a first magnetic center MC1 and a second magnetic center MC2, respectively, when viewed along the second axial direction AX2, and the first magnetic center MC1 and the first guide element 1131 have a first shortest distance MDS1 when viewed along the second axial direction AX2.

[0155] Similarly, when viewed along the second axial direction AX2, the second magnetic center MC2 has a second shortest distance MDS2 from the first guide element 1131, and the second shortest distance MDS2 is equal to the first shortest distance MDS1.

[0156] It is worth mentioning that when viewed along the main axis MX (Z-axis), the first magnetic element MG11 has a first thickness WT1 in the second axial direction AX2, and when viewed along the main axis MX, the second magnetic element MG12 has a second thickness WT2 in the second axial direction AX2. Among them, the second thickness WT2 is greater than the first thickness WT1.

[0157] Based on such a configuration, the second magnetic attraction force AF2 generated by the second magnetic element MG12 will also be greater than the first magnetic attraction force AF1 generated by the first magnetic element MG11. Thus, the second magnetic attraction force AF2 of this embodiment can also avoid the problem of the aforementioned movable part 108 rotating around the first center connecting line CX1 or the third center connecting line CX3 during movement.

[0158] Then please return to Figure 2 , Figure 4 and Figure 5 In the present disclosure, the optical element driving mechanism 100 can also have a fifth magnetic element MG3 and a magnetic conducting plate 120, and the movable part 108 also has a first recess RG1 configured to accommodate the fifth magnetic element MG3. The magnetic conducting plate 120 is arranged on the base 112 and located between the first side SS1 and the second side SS2.

[0159] Based on such a configuration, the fifth magnetic element MG3 can generate a fifth magnetic attraction force AF5 with the magnetic conducting plate 120 to increase the downward pressure on the movable part 108, thereby avoiding the problem of the aforementioned movable part 108 rotating around the first center connecting line CX1 or the third center connecting line CX3 during movement.

[0160] It is worth mentioning that when viewed along the main axis MX, the first recess RG1 is closer to the first guide element 1131 than the second guide element 1132, and when viewed along the main axis MX, the first recess RG1 is closer to the second contact part 1084 than the first contact part 1083.

[0161] Specifically, as Figure 5 shown, when viewed along the main axis MX, the fifth magnetic element MG3 is located inside the aforementioned triangle. Based on such a configuration, the fifth magnetic attraction force AF5 can effectively press down the movable part 108 to avoid the problem of the movable part 108 rotating during movement.

[0162] In addition, as Figure 2As shown, the optical element driving mechanism 100 can further include a light shielding element 116, and the light shielding element 116 is disposed between the movable portion 108 and the magnetic conducting plate 120. The light shielding element 116 is made of a material that absorbs light, such as a black light-absorbing film or black polyurethane, but is not limited thereto. Based on the configuration of the light shielding element 116, light leakage can be avoided to affect the imaging quality of the optical element driving mechanism 100.

[0163] Next, please refer to Figure 2 and Figure 11 . Figure 11 is a top view of a partial structure of an optical element driving mechanism 100 according to an embodiment of the present disclosure. In this embodiment, the optical element driving mechanism 100 can further include two first buffer elements 141 and two second buffer elements 142 disposed on the movable portion 108.

[0164] The two first buffer elements 141 and the two second buffer elements 142 are arranged along the first axial direction AX1, and the first buffer elements 141 and the second buffer elements 142 can be made of an elastic material. For example, they can be made of rubber material, but are not limited thereto.

[0165] As shown in Figure 11 , when the movable portion 108 is driven to move downward along the first direction DC1 to a first limit position EP1, the first buffer elements 141 are configured to abut against a portion of the base 112, so that the movable portion 108 is stopped at the first limit position EP1.

[0166] Similarly, when the movable portion 108 is driven to move upward along the second direction DC2 to a second limit position EP2, the second buffer elements 142 are configured to abut against another portion of the base 112, so that the movable portion 108 is stopped at the second limit position EP2.

[0167] Based on the configuration of the first buffer elements 141 and the second buffer elements 142, it can be ensured that the movable portion 108 will not be damaged due to collision when moving along the first axial direction AX1, and it can also avoid the generation of particles due to collision to affect the image quality after shooting.

[0168] The present disclosure provides an optical element driving mechanism 100, which can include a movable portion 108, a guide assembly GA, and a driving assembly DA. The guide assembly GA can have a first guide element 1131 and a second guide element 1132 configured to guide the movable portion 108 to move along the first axial direction AX1. The first contact portion 1083 and the second contact portion 1084 of the movable portion 108 are configured to contact the first guide element 1131, and the third contact portion 1085 of the movable portion 108 is configured to contact the second guide element 1132.

[0169] The first contact portion 1083 and the third contact portion 1085 can define a first central line CX1, and the second contact portion 1084 and the third contact portion 1085 can define a third central line CX3. During the movement of the movable portion 108 along the first axial direction AX1, the movable portion 108 can rotate around the first central line CX1 or the third central line CX3.

[0170] To avoid the above-mentioned problems, based on the configuration of the present disclosure, in the driving assembly DA, the second magnetic attraction force AF2 generated by the second magnetic element MG12 is greater than the first magnetic attraction force AF1 generated by the first magnetic element MG11, so that sufficient downward pressure can be provided to the movable portion 108. In this way, the downward pressure can avoid the problem that the movable portion 108 can rotate around the first central line CX1 or the third central line CX3, and the downward pressure also does not affect the movement of the movable portion 108, so that the stability and accuracy of the movable portion 108 during movement can be increased.

[0171] Although the embodiments of the present disclosure and their advantages have been disclosed as above, it should be understood that those skilled in the art, without departing from the spirit and scope of the present disclosure, can make changes, replacements and modifications. In addition, the protection scope of the present disclosure is not limited to the specific embodiments described in the specification, and any person skilled in the art can understand the current or future developed processes, machines, manufactures, compositions of matter, devices, methods and steps from the disclosure of the present disclosure, as long as they can substantially achieve the same function or obtain substantially the same results as the embodiments described herein. Therefore, the protection scope of the present disclosure includes the above-mentioned processes, machines, manufactures, compositions of matter, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the protection scope of the present disclosure also includes the combination of each claim and embodiment.

Claims

1. An optical element driving mechanism characterized by comprising: The optical element driving mechanism comprises: a fixed component; a movable component configured to connect an optical element and movable relative to the fixed component; and a driving component configured to drive the movable component to move relative to the fixed component; wherein the fixed component comprises a receiving space configured to receive the optical element.

2. The optical element driving mechanism of claim 1, wherein: the fixed component has a cover and a base; the cover is fixedly connected to the base along a main axis to form the receiving space; the optical element driving mechanism further comprises a guiding component configured to guide the movable component to move along a first axis; the first axis is perpendicular to the main axis; the guiding component has a first guiding element and a second guiding element extending along the first axis and configured to guide the movable component; the first guiding element and the second guiding element are respectively located at a first side and a second side of the movable component when viewed along the main axis; the first guiding element and the second guiding element are arranged along a second axis when viewed along the main axis; the second axis is perpendicular to the first axis; the movable component has a first guiding groove and a second guiding groove configured to receive the first guiding element and the second guiding element respectively; the first guiding groove has a V-shaped structure and the first guiding element has a circular structure when viewed along the first axis; the second guiding groove has a U-shaped structure and the second guiding element has a circular structure when viewed along the first axis.

3. The optical element driving mechanism of claim 2, wherein: the movable component further has a first contact portion and a second contact portion disposed in the first guiding groove; the first contact portion and the second contact portion are configured to contact the first guiding element; the movable component further has a third contact portion disposed in the second guiding groove; the third contact portion is configured to contact the second guiding element; the first contact portion defines a first contact center, the second contact portion defines a second contact center, and the third contact portion defines a third contact center; the first contact center and the third contact center define a first center line which is neither parallel nor perpendicular to the first axis when viewed along the main axis; the first contact center and the second contact center define a second center line which is parallel to the first axis when viewed along the main axis; the third contact center and the second contact center define a third center line which is neither parallel nor perpendicular to the first axis when viewed along the main axis; the first contact center, the second contact center, and the third contact center together form a triangle when viewed along the main axis; the triangle is a non-isosceles triangle.

4. The optical element driving mechanism of claim 3, wherein: the driving component comprises a first magnetic element, a second magnetic element, and a first coil; the first magnetic element and the second magnetic element are disposed on the movable component and located at the first side; the first coil is disposed on the base and corresponds to the first magnetic element and the second magnetic element. The driving assembly further comprises a third magnetic element, a fourth magnetic element, and a second coil; The third magnetic element and the fourth magnetic element are disposed on the movable part and located at the second side; The second coil is disposed on the base and corresponds to the third magnetic element and the fourth magnetic element; The first guide element and the second guide element are made of magnetic material; The first magnetic element and the second magnetic element are configured to generate a first magnetic attraction and a second magnetic attraction with the first guide element, respectively; When viewed along the first axis, the first magnetic attraction and the second magnetic attraction are located on opposite sides of the first contact center; The third magnetic element and the fourth magnetic element are configured to generate a third magnetic attraction and a fourth magnetic attraction with the second guide element, respectively; When viewed along the second axis, the third magnetic attraction and the fourth magnetic attraction are located on opposite sides of the third contact center; The projection of the second magnetic attraction along the second axis falls on the second center line; The projection of the first magnetic attraction along the second axis does not fall on the second center line; The second magnetic attraction is greater than the first magnetic attraction; The magnetic attraction difference between the fourth magnetic attraction and the third magnetic attraction is different from the magnetic attraction difference between the second magnetic attraction and the first magnetic attraction; The magnetic attraction difference between the fourth magnetic attraction and the third magnetic attraction is less than the magnetic attraction difference between the second magnetic attraction and the first magnetic attraction.

5. The optical element driving mechanism of claim 4, wherein, When viewed along the second axis, the size of the first magnetic element is different from the size of the second magnetic element; When viewed along the second axis, the size of the second magnetic element is greater than the size of the first magnetic element; When viewed along the second axis, the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively; When viewed along the second axis, the first magnetic center and the first guide element have a first shortest distance; When viewed along the second axis, the second magnetic center and the first guide element have a second shortest distance; The second shortest distance is different from the first shortest distance; The second shortest distance is less than the first shortest distance.

6. The optical element driving mechanism of claim 4, wherein, When viewed along the second axis, the size of the first magnetic element is equal to the size of the second magnetic element; When viewed along the second axis, the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively; When viewed along the second axis, the first magnetic center and the first guide element have a first shortest distance; When viewed along the second axis, the second magnetic center and the first guide element have a second shortest distance; The second shortest distance is different from the first shortest distance; The second shortest distance is less than the first shortest distance; When viewed along the first axis, a portion of the first magnetic element does not overlap a portion of the second magnetic element.

7. The optical element driving mechanism of claim 4, wherein, a size of the second magnetic element is equal to a size of the first magnetic element when viewed along the second axis; the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively, when viewed along the second axis; the first magnetic center has a first shortest distance to the first guide element when viewed along the second axis; the second magnetic center has a second shortest distance to the first guide element when viewed along the second axis; the second shortest distance is equal to the first shortest distance; the first magnetic element has a first thickness in the second axis when viewed along the main axis; the second magnetic element has a second thickness in the second axis when viewed along the main axis; the second thickness is greater than the first thickness.

8. The optical element driving mechanism of claim 4, wherein, a size of the second magnetic element is equal to a size of the first magnetic element when viewed along the second axis; the first magnetic element and the second magnetic element have a first magnetic center and a second magnetic center, respectively, when viewed along the second axis; the first magnetic center has a first shortest distance to the first guide element when viewed along the second axis; the second magnetic center has a second shortest distance to the first guide element when viewed along the second axis; the second shortest distance is equal to the first shortest distance; the first guide element has a first section and a second section; the second section is connected to the first section; the first section corresponds to the first magnetic element; the second section corresponds to the second magnetic element; a permeability of the second section is greater than a permeability of the first section.

9. The optical element driving mechanism of claim 4, wherein, the optical element driving mechanism further comprises a fifth magnetic element and a magnetic permeable plate; the movable portion further comprises a first recess configured to accommodate the fifth magnetic element; the magnetic permeable plate is disposed on the base and located between the first side and the second side; the fifth magnetic element is configured to generate a fifth magnetic attractive force with the magnetic permeable plate; the first recess is closer to the first guide element than the second guide element when viewed along the main axis; the first recess is closer to the second contact portion than the first contact portion when viewed along the main axis; the fifth magnetic element is located inside the triangle when viewed along the main axis.

10. The optical element driving mechanism of claim 9, wherein, the third magnetic element is adjacent to the fourth magnetic element at an interface; the interface passes through the third contact center; the interface passes through a center of gravity of the optical element and the movable portion when viewed along the main axis; the optical element driving mechanism further comprises a circuit assembly and a light shielding element; the circuit assembly is disposed on the base; the first coil and the second coil are configured to be electrically connected to the circuit assembly; the light shielding element is disposed between the movable portion and the magnetic permeable plate; the light shielding element is made of a material that absorbs light; The optical element driving mechanism further comprises a first sensing element and a sensing magnet; The first sensing element and the sensing magnet are respectively arranged on the circuit assembly and the movable portion; The optical element driving mechanism further comprises a protection element arranged between the movable portion and the sensing magnet; The protection element is configured to cover a portion of the sensing magnet; The protection element has an L-shaped structure when viewed along the main axis; The optical element driving mechanism further comprises a first buffer element and a second buffer element arranged on the movable portion; The first buffer element and the second buffer element are arranged along the first axis; The first buffer element is configured to abut against the base when the movable portion is driven to move to a first limit position; The second buffer element is configured to abut against the base when the movable portion is driven to move to a second limit position.

Images