Optical element driving mechanism

Abstract

The invention 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 Art

[0002] With the development of technology, many electronic devices (such as smart phones) now have the function of taking photos or recording videos. Through the camera module installed on the electronic device, the user can operate the electronic device to extract a variety of photos.

[0003] The design of today's electronic devices continues to trend toward miniaturization, forcing the various components and structures of camera modules to shrink in size to achieve this goal. Generally speaking, the drive mechanism in a camera module may include a lens carrier configured to support a lens, and the drive mechanism may also provide autofocus or optical image stabilization functions. However, while existing drive mechanisms can achieve the aforementioned photo or video functions, they still cannot meet all requirements.

[0004] Therefore, how to design a camera module that can simultaneously perform autofocus and optical image stabilization while achieving miniaturization is a topic worth exploring and solving today. Summary of the Invention

[0005] In view of this, the present disclosure aims to provide an optical element driving mechanism to solve the above-mentioned problems.

[0006] The present disclosure provides an optical element drive mechanism comprising a fixed assembly, a movable portion, and a drive assembly. The movable portion is configured to connect to an optical element and is movable relative to the fixed assembly. The drive assembly is configured to drive the movable portion to move relative to the fixed assembly. The fixed assembly includes a housing configured to accommodate the optical element.

[0007] According to some embodiments of the present disclosure, a fixing assembly includes an outer cover and a base. The outer cover is fixedly connected to the base along a main axis to form an accommodating space. The optical element driving mechanism also includes a guide assembly configured to guide the movable portion to move along a first axial direction. The first axial direction is perpendicular to the main axis. The guide assembly includes a first guide element and a second guide element, extending along the first axial direction and configured to guide the movable portion. When viewed along the main axis, the first guide element and the second guide element are located on a first side and a second side of the movable portion, respectively. When viewed along the main axis, the first guide element and the second guide element are arranged along a second axial direction, which is perpendicular to the first axial direction. The movable portion includes a first guide groove and a second guide groove, configured to accommodate the first guide element and the second guide element, respectively. When viewed along the first axial direction, the first guide groove has a V-shaped structure, and the first guide element has a circular structure. When viewed along the first axial direction, the second guide groove has a U-shaped structure, and the second guide element has a circular structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present disclosure will be clearly understood through the detailed description that follows in conjunction with the accompanying drawings. It is emphasized that, in accordance with standard industry practice, various features are not drawn to scale and are used for illustrative purposes only. In fact, the dimensions of various features may be arbitrarily enlarged or reduced for clarity of illustration.

[0009] Figure 1 3D is a schematic three-dimensional diagram of an optical element driving mechanism according to an embodiment of the present disclosure.

[0010] Figure 2 1 is an exploded view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0011] Figure 3 The optical element driving mechanism according to one embodiment of the present disclosure is Figure 1 Cross-section of midline segment AA.

[0012] Figure 4 FIG. 1 is a perspective view of a portion of the structure of the optical element driving mechanism according to an embodiment of the present disclosure from another perspective.

[0013] Figure 5 1 is a top view of a partial structure of an optical element driving mechanism according to an embodiment of the present disclosure.

[0014] Figure 6 2 is a side view of a partial structure of an optical element driving mechanism according to an embodiment of the present disclosure.

[0015] Figure 7A FIG. 1 is a side view of a partial structure of an optical element driving mechanism according to an embodiment of the present disclosure at another viewing angle.

[0016] Figure 7B FIG. 1 is a side view of a partial structure of an optical element driving mechanism according to another embodiment of the present disclosure at another viewing angle.

[0017] Figure 8 2 is a side view of a partial structure of an optical element driving mechanism according to another embodiment of the present disclosure.

[0018] Figure 9 2 is a side view of a partial structure of an optical element driving mechanism according to another embodiment of the present disclosure.

[0019] Figure 10 It is a three-dimensional diagram of a partial structure of an optical element driving mechanism according to another embodiment of the present disclosure.

[0020] Figure 11 1 is a top view of a partial structure of an optical element driving mechanism according to an embodiment of the present disclosure.

[0021] The reference numerals are as follows:

[0022] 100: Optical element drive mechanism

[0023] 102: Outer cover

[0024] 108: Activities Department

[0025] 112: Base

[0026] 114: Circuit components

[0027] 116: Shading element

[0028] 120: Magnetic plate

[0029] 121: first electrical connection component

[0030] 122: Second electrical connection component

[0031] 130: Protection element

[0032] 141: first cushioning element

[0033] 142: Second cushioning element

[0034] 1131: First guiding element

[0035] 1132: Second guiding element

[0036] AF1: First magnetic attraction

[0037] AF2: Second magnetic attraction

[0038] AF3: The third magnetic force

[0039] AF4: The fourth magnetic force

[0040] AF5: The fifth magnetic force

[0041] AS1: Accommodation space

[0042] AX1: first axis

[0043] AX2: Second axis

[0044] CC1: First Contact Center

[0045] CC2: Second Contact Center

[0046] CC3: Third Contact Center

[0047] CL1: First coil

[0048] CL2: Second coil

[0049] CX1: First center connection

[0050] CX2: Second center line

[0051] CX3: Third center line

[0052] DA: Drive assembly

[0053] DC1: First direction

[0054] DC2: Second direction

[0055] EP1: First extreme position

[0056] EP2: Second extreme position

[0057] FA:Fixed components

[0058] GA:Guidance Components

[0059] MC1: First Magnetic Center

[0060] MC2: Second Magnetic Center

[0061] MC3: Third Magnetic Center

[0062] MC4: Fourth Magnetic Center

[0063] MDS1: First shortest distance

[0064] MDS2: Second shortest distance

[0065] MG11: First magnetic element

[0066] MG12: Second magnetic element

[0067] MG21: The third magnetic element

[0068] MG22: The fourth magnetic element

[0069] MG3: The fifth magnetic element

[0070] MGS: Magnetic Sensing

[0071] MX:Spindle

[0072] OE: Optical Components

[0073] OP1: First opening

[0074] RD1: First direction of rotation

[0075] RD2: Second direction of rotation

[0076] RG1: first groove

[0077] SE1: First sensing element

[0078] SG1: First section

[0079] SG2: Second section

[0080] SS1: First side

[0081] SS2: Second side

[0082] WC1: Center of Gravity

[0083] WT1: First thickness

[0084] WT2: Second thickness

[0085] XL1: Interface

[0086] X: X axis

[0087] Y: Y axis

[0088] Z: Z axis DETAILED DESCRIPTION

[0089] The following discloses many different implementation methods or examples for implementing the different features provided. The following describes specific embodiments of components and their arrangements to illustrate the present disclosure. Of course, these embodiments are only for illustration and should not be used to limit the scope of the present disclosure. For example, when the specification mentions that a first feature component is formed on a second feature component, it may include an embodiment in which the first feature component and the second feature component are in direct contact. It may also include an embodiment in which there are other features between the first feature component and the second feature component. In other words, the first feature component and the second feature component are not in direct contact.

[0090] In addition, repeated numbers or labels may be used in different embodiments. These repetitions are only for the purpose of simply and clearly describing the present disclosure and do not represent a specific relationship between the different embodiments and / or structures discussed. In addition, in the present disclosure, forming, connecting and / or coupling to another feature component on top of another feature component may include embodiments in which the feature components are formed to be in direct contact, and may also include embodiments in which additional feature components can be formed to be inserted into the above-mentioned feature components, so that the above-mentioned feature components may not be in direct contact. In addition, spatially related words such as "vertical", "above", "up", "below", "bottom" and similar words (such as "downwardly", "upwardly", etc.) may be used. These spatially related words are for the purpose of facilitating the description of the relationship between one (some) element or feature and another (some) element or feature in the diagram. These spatially related words are intended to cover different directions of the device including the feature.

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

[0092] Furthermore, the use of ordinal numbers such as "first" and "second" in the specification and claims to modify claim elements does not in itself imply or represent that the claimed element has any previous ordinal number, nor does it represent the order of one claimed element and another claimed element, or the order in the manufacturing method. The use of multiple ordinal numbers is only used to clearly distinguish a claimed element with a certain name from another claimed element with the same name.

[0093] Furthermore, in some embodiments of the present disclosure, terms such as "connected" and "interconnected," unless otherwise specified, may refer to two structures being in direct contact, or to two structures not being in direct contact, with another structure positioned between them. Furthermore, such terms may include situations where both structures are movable or both structures are fixed.

[0094] Please refer to Figures 1 to 3 , Figure 1 FIG. 1 is a perspective schematic diagram of an optical element driving mechanism 100 according to an embodiment of the present disclosure. Figure 2 is an exploded view of an optical element driving mechanism 100 according to an embodiment of the present disclosure, and Figure 3 The optical element driving mechanism 100 according to an embodiment of the present disclosure is Figure 1The optical element driving mechanism 100 may be an optical camera module configured to carry and drive an optical element OE.

[0095] The optical element driving mechanism 100 can be installed in various electronic devices or portable electronic devices, such as a smartphone, to allow users to perform image capture. In this embodiment, the optical element driving mechanism 100 is a voice coil motor (VCM) with autofocus (AF) functionality, but the present disclosure is not limited to this. In other embodiments, the optical element driving mechanism 100 may also have autofocus (AF) and optical image stabilization (OIS) functions.

[0096] like Figure 2 As shown, 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 to the aforementioned optical element OE and is movable 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.

[0097] In this embodiment, if Figure 1 and Figure 2 As shown, the fixing assembly FA includes an outer cover 102 and a base 112. The outer cover 102 is fixedly connected to the base 112 along a principal axis MX to form an accommodating space AS1 for accommodating the optical element OE. The outer cover 102 may have a first opening OP1, and when viewed along the principal axis MX, the optical element OE is exposed through the first opening OP1. The optical element OE may be an optical lens, but is not limited thereto.

[0098] The optical element driving mechanism 100 may further include a guide 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. Specifically, the guide assembly GA may include a first guide element 1131 and a second guide element 1132 extending along the first axial direction AX1 and configured to guide the movable portion 108.

[0099] In this embodiment, if Figure 2 As shown, the driving assembly DA may 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 disposed on the movable portion 108, and the first coil CL1 is disposed on the base 112 and corresponds to the first magnetic element MG11 and the second magnetic element MG12.

[0100] Similarly, the driving assembly DA may 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 disposed on the movable portion 108, and the second coil CL2 is disposed on the base 112 and corresponds to the third magnetic element MG21 and the fourth magnetic element MG22.

[0101] Specifically, the driving assembly DA may further include a first electrical connection assembly 121 and a second electrical connection assembly 122. The first coil CL1 is disposed on the base 112 via the first electrical connection assembly 121, and the second coil CL2 is disposed on the base 112 via the second electrical connection assembly 122. Furthermore, the optical element driving mechanism 100 may further include a circuit assembly 114 fixedly disposed on the base 112.

[0102] In this embodiment, the circuit component 114 may be a printed circuit board, and the first electrical connection component 121 and the second electrical connection component 122 may be plastic plates in which metal circuits may be embedded using insert molding technology to electrically connect to the circuit component 114, but the present invention is not limited thereto.

[0103] That is to say, the first coil CL1 and the second coil CL2 are fixedly disposed on the first electrical connection component 121 and the second electrical connection component 122 respectively, so as to be electrically connected to the circuit component 114 through the first electrical connection component 121 and the second electrical connection component 122.

[0104] 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 part 108 and the optical element OE to move back and forth along the first axis AX1 to achieve the purpose of autofocus.

[0105] In addition, if Figure 2 and Figure 3 As shown, the optical element driving mechanism 100 may further include a first sensing element SE1 and a sensing magnet MGS. The first sensing element SE1 and the sensing magnet MGS are disposed on the circuit component 114 and the movable portion 108, respectively. The first sensing element SE1 is configured to sense changes in the magnetic field of the sensing magnet MGS to sense the position of the movable portion 108.

[0106] 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 protective element 130 disposed between the movable portion 108 and the sensing magnet MGS. The protective element 130 is configured to partially cover the sensing magnet MGS.

[0107] like Figure 3 As shown, when viewed along the main axis MX, the protection element 130 has an L-shaped structure and is made of, for example, a magnetically conductive material. Based on the configuration of the protection element 130, interference with the sensing magnet MGS by other magnetic elements (magnets) can be avoided, thereby increasing the accuracy of position sensing.

[0108] Next, please refer to Figures 1 to 5 , Figure 4 is a perspective view of a portion of the structure of the optical element driving mechanism 100 according to an embodiment of the present disclosure at another viewing angle, and Figure 5 FIG. 1 is a top view of a partial structure of an optical element driving mechanism 100 according to an embodiment of the present disclosure. Figure 5 As shown, when viewed along the main axis MX, the first guiding element 1131 and the second guiding element 1132 are respectively located on a first side SS1 and a second side SS2 of the movable portion 108 .

[0109] When viewed along the main axis MX, the first guide element 1131 and the second guide element 1132 are arranged along a second axis AX2, and the second axis AX2 is perpendicular to the first axis AX1. Figure 4 and Figure 5 As shown, the movable portion 108 may have a first guiding groove 1081 and a second guiding groove 1082 configured to respectively accommodate the first guiding element 1131 and the second guiding element 1132 .

[0110] like Figure 3 As shown, when viewed along the first axial direction AX1 (Y axis), the first guide groove 1081 has a V-shaped structure, and the first guide element 1131 has a circular structure, but is not limited thereto. When viewed along the first axial direction AX1, the second guide groove 1082 has a U-shaped structure, and the second guide element 1132 has a circular structure, but is not limited thereto.

[0111] Furthermore, if Figure 4 and 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 guiding groove 1081 , and the first contact portion 1083 and the second contact portion 1084 are, for example, protruding structures configured to contact the first guiding element 1131 .

[0112] Similarly, the movable portion 108 may further have a third contact portion 1085 disposed in the second guiding groove 1082 , and the third contact portion 1085 is, for example, a protruding structure configured to contact the second guiding element 1132 .

[0113] like Figure 5 As shown, the first contact portion 1083 may define a first contact center CC1, the second contact portion 1084 may define a second contact center CC2, and the third contact portion 1085 may define a third contact center CC3. When viewed along the main axis MX, the first contact center CC1 and the third contact center CC3 may define a first centerline CX1 that is neither parallel nor perpendicular to the first axial direction AX1.

[0114] Furthermore, when viewed along the principal axis MX, the first contact center CC1 and the second contact center CC2 define a second centerline CX2 that is substantially parallel to the first axial direction AX1. When viewed along the principal axis MX, the third contact center CC3 and the second contact center CC2 define a third centerline CX3 that is neither parallel nor perpendicular to the first axial direction AX1.

[0115] like Figure 5 As shown, when viewed along the principal axis MX, the first center line CX1, the second center line CX2, and the third center line CX3 together form a triangle. It is worth noting that this triangle is non-isosceles. That is, the length of the first center line CX1 is not equal to the length of the third center line CX3.

[0116] Furthermore, if Figure 5 As shown, the first magnetic element MG11 and the second magnetic element MG12 are located on the first side SS1, and the third magnetic element MG21 and the fourth magnetic element MG22 are located on the second side SS2. It should be noted that the first guiding element 1131 and the second guiding element 1132 are made of a magnetically permeable material.

[0117] 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 on opposite sides of the first contact center CC1.

[0118] 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 on opposite sides of the third contact center CC3.

[0119] It is worth noting that the projection of the second magnetic force AF2 along the second axial direction AX2 falls on the second center line CX2, while the projection of the first magnetic force AF1 along the second axial direction AX2 does not fall on the second center line CX2, and the second magnetic force AF2 is greater than the first magnetic force AF1.

[0120] Then continue 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 portion of the structure of the optical element driving mechanism 100 according to an embodiment of the present disclosure at another viewing angle, and Figure 7B FIG. 1 is a side view of a partial structure of the optical element driving mechanism 100 at another viewing angle according to another embodiment of the present disclosure.

[0121] like Figure 6 As 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 larger than the size of the first magnetic element MG11.

[0122] When viewed along the second axial direction AX2, the first magnetic element MG11 and the second magnetic element MG12 each have a first magnetic center MC1 and a second magnetic center MC2. When viewed along the second axial direction AX2, a first minimum distance MDS1 is defined between the first magnetic center MC1 and the first guiding element 1131. When viewed along the second axial direction AX2, a second minimum distance MDS2 is defined between the second magnetic center MC2 and the first guiding element 1131.

[0123] In this embodiment, the second shortest distance MDS2 is different from the first shortest distance MDS1. Specifically, the second shortest distance MDS2 is smaller than the first shortest distance MDS1. Due to the larger size of the second magnetic element MG12, 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.

[0124] During movement of the movable portion 108 along the first axial direction AX1, the movable portion 108 may 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 may rotate about the first center line CX1 along a first rotational direction RD1. This may cause the second contact portion 1084 to disengage from the first guide element 1131, thereby affecting the accuracy of the movable portion 108's movement.

[0125] Since the second magnetic attraction force AF2 of this embodiment is greater than the first magnetic attraction force AF1, and the projection of the second magnetic attraction force AF2 falls between the first contact portion 1083 and the second contact portion 1084, that is, falls on the second center line CX2 (as shown in FIG. Figure 5 As shown), the torque generated by the second magnetic attraction force AF2 relative to the first contact portion 1083 is greater than the torque generated by the first magnetic attraction force AF1 relative to the first contact portion 1083.

[0126] Therefore, the second magnetic attraction force AF2 can be applied as a downward pressure on the movable portion 108 to prevent the movable portion 108 from rotating around the first center line CX1, thereby increasing the stability and accuracy of the movable portion 108 during movement.

[0127] Similarly, Figure 4 and Figure 5 As shown, when the movable portion 108 moves along a second direction DC2, the movable portion 108 may rotate along a second rotational direction RD2 about the third center line CX3. This may cause the first contact portion 1083 to separate from the first guiding element 1131, thereby affecting the accuracy of the movement of the movable portion 108. The second direction DC2 is opposite to the first direction DC1, and the second direction DC2 and the first direction DC1 are parallel to the first axial direction AX1.

[0128] Similarly, since the second magnetic force AF2 is greater than the first magnetic force AF1, the second magnetic force AF2 can also generate downward force to prevent the movable portion 108 from rotating around the third center line CX3, thereby increasing the stability and accuracy of the movable portion 108 during movement.

[0129] Then, if 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. When viewed along the main axis MX, the interface XL1 passes through the optical element OE and a center of gravity WC1 of the movable portion 108. Based on this structural configuration, the stability of the movable portion 108 during movement can be increased.

[0130] In addition, if Figure 7AAs 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 larger than the third magnetic attraction force AF3. It should be noted that the magnetic attraction force difference between the fourth magnetic attraction force AF4 and the third magnetic attraction force AF3 is different from the magnetic attraction force difference between the second magnetic attraction force AF2 and the first magnetic attraction force AF1. Specifically, the magnetic attraction force difference between the fourth magnetic attraction force AF4 and the third magnetic attraction force AF3 is smaller than the magnetic attraction force difference between the second magnetic attraction force AF2 and the first magnetic attraction force AF1.

[0131] Alternatively, in other embodiments, 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, and thus the movable portion 108 will not rotate.

[0132] based on Figure 7A and Figure 7B With this structural configuration, the difference in magnetic attraction force between the fourth magnetic attraction force AF4 and the third magnetic attraction force AF3 will not cause the movable portion 108 to rotate, thereby further avoiding the aforementioned problem that the movable portion 108 may rotate around the first center line CX1 or the third center line CX3.

[0133] Please refer to Figure 8 . Figure 8 FIG2 is a side view of a portion of an optical element driving mechanism 100 according to another embodiment of the present disclosure. In this embodiment, when viewed along the second axial direction AX2, the size of the second magnetic element MG12 is equal to the size of the first magnetic element MG11. In other words, the second magnetic element MG12 and the first magnetic element MG11 have the same area in the YZ plane.

[0134] Similarly, when viewed along the second axis AX2 , 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 axis AX2 , the first magnetic center MC1 has a first shortest distance MDS1 from the first guiding element 1131 .

[0135] Similarly, when viewed along the second axial direction AX2, a second shortest distance MDS2 exists between the second magnetic center MC2 and the first guiding element 1131, and the second shortest distance MDS2 is different from the first shortest distance MDS1. Similar to the previous embodiment, the second shortest distance MDS2 is also smaller than the first shortest distance MDS1.

[0136] Furthermore, when viewed along the first axial direction AX1, a portion of the first magnetic element MG11 does not overlap a portion of the second magnetic element MG12. In other words, the first magnetic center MC1 and the second magnetic center MC2 are not located on the same horizontal plane (eg, XY plane).

[0137] Therefore, based on this configuration, because the second magnetic center MC2 is closer to the first guide element 1131 than the first magnetic center MC1, the second magnetic attraction force AF2 is greater than the first magnetic attraction force AF1. Consequently, the second magnetic attraction force AF2 of this embodiment also prevents the movable portion 108 from rotating about the first center line CX1 or the third center line CX3 during movement.

[0138] Please refer to Figure 9 . Figure 9 FIG1 is a side view of a portion of the optical element driving mechanism 100 according to another embodiment of the present disclosure. In this embodiment, when viewed along the second axial direction AX2, the size of the second magnetic element MG12 is equal to the size of the first magnetic element MG11.

[0139] Similarly, when viewed along the second axis AX2 , the first magnetic element MG11 and the second magnetic element MG12 respectively have a first magnetic center MC1 and a second magnetic center MC2 , and when viewed along the second axis AX2 , a first shortest distance MDS1 exists between the first magnetic center MC1 and the first guiding element 1131 .

[0140] Similarly, when viewed along the second axial direction AX2 , a second shortest distance MDS2 is present between the second magnetic center MC2 and the first guiding element 1131 , and the second shortest distance MDS2 is equal to the first shortest distance MDS1 .

[0141] It is worth noting that in this embodiment, the first guide element 1131 may have a first section SG1 and a second section SG2, with the second section SG2 connected to the first section SG1. The first section SG1 corresponds to the first magnetic element MG11, and the second section SG2 corresponds to the second magnetic element MG12. The lengths of the first section SG1 and the second section SG2 may be equal or different.

[0142] The magnetic permeability of the second segment SG2 is greater than that of the first segment SG1. Based on this 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 is still greater than the first magnetic attraction force AF1 generated by the first magnetic element MG11.

[0143] Therefore, the second magnetic attraction force AF2 of this embodiment can also prevent the movable portion 108 from rotating around the first center line CX1 or the third center line CX3 during movement.

[0144] Please refer to Figure 10 . Figure 10 FIG2 is a perspective view of a portion of an optical element driving mechanism 100 according to another embodiment of the present disclosure. In this embodiment, when viewed along the second axial direction AX2, the size of the second magnetic element MG12 is equal to the size of the first magnetic element MG11. In other words, the second magnetic element MG12 and the first magnetic element MG11 have the same area in the YZ plane.

[0145] Similarly, when viewed along the second axis AX2 , the first magnetic element MG11 and the second magnetic element MG12 respectively have a first magnetic center MC1 and a second magnetic center MC2 , and when viewed along the second axis AX2 , a first shortest distance MDS1 exists between the first magnetic center MC1 and the first guiding element 1131 .

[0146] Similarly, when viewed along the second axial direction AX2 , a second shortest distance MDS2 is present between the second magnetic center MC2 and the first guiding element 1131 , and the second shortest distance MDS2 is equal to the first shortest distance MDS1 .

[0147] It is worth noting that, when viewed along the main axis MX (Z-axis), the first magnetic element MG11 has a first thickness WT1 along the second axial direction AX2, and when viewed along the main axis MX, the second magnetic element MG12 has a second thickness WT2 along the second axial direction AX2. The second thickness WT2 is greater than the first thickness WT1.

[0148] Based on this configuration, the second magnetic attraction force AF2 generated by the second magnetic element MG12 is also greater than the first magnetic attraction force AF1 generated by the first magnetic element MG11. Therefore, the second magnetic attraction force AF2 of this embodiment can also prevent the movable portion 108 from rotating around the first center line CX1 or the third center line CX3 during movement.

[0149] Then please return to Figure 2 、 Figure 4 and Figure 5 In the present disclosure, the optical element driving mechanism 100 may further include a fifth magnetic element MG3 and a magnetic conductive plate 120 , and the movable portion 108 may further include a first groove RG1 configured to accommodate the fifth magnetic element MG3 . The magnetic conductive plate 120 is disposed on the base 112 and located between the first side SS1 and the second side SS2 .

[0150] Based on this configuration, the fifth magnetic element MG3 can generate a fifth magnetic attraction force AF5 with the magnetic conductive plate 120 to increase the downward pressure on the movable portion 108, thereby avoiding the problem of the movable portion 108 rotating around the first center line CX1 or the third center line CX3 during movement.

[0151] It is worth noting that, when viewed along the main axis MX, the first groove RG1 is closer to the first guiding element 1131 than the second guiding element 1132 , and when viewed along the main axis MX, the first groove RG1 is closer to the second contact portion 1084 than the first contact portion 1083 .

[0152] Specifically, if Figure 5 As shown, when viewed along the main axis MX, the fifth magnetic element MG3 is located inside the aforementioned triangle. Based on this configuration, the fifth magnetic attraction force AF5 can effectively press down the movable portion 108 to prevent the movable portion 108 from rotating during movement.

[0153] In addition, if Figure 2 As shown, the optical element driving mechanism 100 may further include a light shielding element 116 disposed between the movable portion 108 and the magnetic conductive plate 120. The light shielding element 116 is made of a light-absorbing material, such as, but not limited to, a black light-absorbing film or black polyurethane. The configuration of the light shielding element 116 prevents light leakage that could affect the imaging quality of the optical element driving mechanism 100.

[0154] Please refer to Figure 2 and Figure 11 . Figure 11 FIG. 1 is a top view of a portion of the structure of the optical element driving mechanism 100 according to an embodiment of the present disclosure. In this embodiment, the optical element driving mechanism 100 may further include two first buffer elements 141 and two second buffer elements 142 disposed on the movable portion 108 .

[0155] 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 elastic material, for example, rubber material, but not limited thereto.

[0156] like Figure 11 As shown, when the movable portion 108 is driven to move downward along the first direction DC1 to a first limit position EP1 , the first buffer element 141 is configured to abut against a portion of the base 112 , so that the movable portion 108 is stopped at the first limit position EP1 .

[0157] 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 element 142 is configured to abut against another portion of the base 112 , so that the movable portion 108 is stopped at the second limit position EP2 .

[0158] Based on the configuration of the first buffer element 141 and the second buffer element 142 , it is possible to ensure that the movable portion 108 will not be damaged by collision when moving along the first axis AX1 , and to prevent particles generated by collision from affecting the quality of captured images.

[0159] The present disclosure provides an optical element driving mechanism 100, which may include a movable portion 108, a guide assembly GA, and a driving assembly DA. The guide assembly GA may include a first guide element 1131 and a second guide element 1132, configured to guide the movable portion 108 along a 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.

[0160] The first contact portion 1083 and the third contact portion 1085 may define a first center line CX1, and the second contact portion 1084 and the third contact portion 1085 may define a third center line CX3. During movement of the movable portion 108 along the first axial direction AX1, the movable portion 108 may rotate about the first center line CX1 or the third center line CX3.

[0161] To avoid the aforementioned problem, based on the configuration disclosed herein, in the drive 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, thereby providing sufficient downward force to the movable portion 108. This downward force prevents the movable portion 108 from rotating about the first center line CX1 or the third center line CX3, and does not affect the movement of the movable portion 108, thereby increasing the stability and accuracy of the movable portion 108 during movement.

[0162] 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 may make changes, substitutions and modifications without departing from the spirit and scope of the present disclosure. In addition, the scope of protection of the present disclosure is not limited to the processes, machines, manufactures, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any person skilled in the art can understand from the disclosure of the present disclosure that the processes, machines, manufactures, material compositions, devices, methods and steps currently or in the future are developed. As long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can be used according to the present disclosure. Therefore, the scope of protection of the present disclosure includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of the present disclosure also includes the combination of each claim and embodiment.

Claims

1. An optical element driving mechanism, comprising: a fixing component; a movable portion configured to connect to an optical element and movable relative to the fixed component; and a driving assembly configured to drive the movable portion to move relative to the fixed assembly; The fixing assembly includes a receiving space configured to accommodate the optical element.

2. The optical element driving mechanism according to claim 1, wherein The fixing assembly has an outer cover and a base; The outer cover is fixedly connected to the base along a main axis to form the accommodating space; The optical element driving mechanism further includes a guide assembly configured to guide the movable portion to move along a first axial direction; The first axial direction is perpendicular to the main axis; The guide assembly comprises a first guide element and a second guide element, extending along the first axial direction and configured to guide the movable portion; When viewed along the main axis, the first guide element and the second guide element are respectively located on a first side and a second side of the movable portion; When viewed along the main axis, the first guide element and the second guide element are arranged along a second axial direction; The second axial direction is perpendicular to the first axial direction; The movable portion has a first guiding groove and a second guiding groove, configured to respectively accommodate the first guiding element and the second guiding element; When viewed along the first axial direction, the first guide groove has a V-shaped structure, and the first guide element has a circular structure; When viewed along the first axial direction, the second guide groove has a U-shaped structure, and the second guide element has a circular structure.

3. The optical element driving mechanism according to claim 2, wherein The movable portion further has a first contact portion and a second contact portion, which are 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 portion 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; When viewed along the main axis, the first contact center and the third contact center define a first center line that is neither parallel nor perpendicular to the first axial direction; When viewed along the main axis, the first contact center and the second contact center define a second center line parallel to the first axial direction; 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 axial direction; When viewed along the main axis, the first contact center, the second contact center, and the third contact center together form a triangle; The triangle is not an isosceles triangle.

4. The optical element driving mechanism according to claim 3, wherein 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 on 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 on 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 guiding element and the second guiding element are made of magnetic 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 guiding element respectively; When viewed along the major axis, 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 respectively with the second guiding element; When viewed along the major axis, 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 along the second axial direction falls on the second center line; The projection of the first magnetic attraction 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.

5. The optical element driving mechanism according to claim 4, wherein 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 larger than the size of the first magnetic element; When viewed along the second axis, the first magnetic element and the second magnetic element respectively have a first magnetic center and a second magnetic center; When viewed along the second axial direction, there is a first shortest distance between the first magnetic center and the first guiding element; When viewed along the second axial direction, there is a second shortest distance between the second magnetic center and the first guiding element; The second shortest distance is different from the first shortest distance; The second shortest distance is smaller than the first shortest distance.

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

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

8. The optical element driving mechanism according to claim 4, wherein When viewed along the second axial direction, the size of the second magnetic element is equal to the size of the first magnetic element; When viewed along the second axis, the first magnetic element and the second magnetic element respectively have a first magnetic center and a second magnetic center; When viewed along the second axial direction, there is a first shortest distance between the first magnetic center and the first guiding element; When viewed along the second axial direction, there is a second shortest distance between the second magnetic center and the first guiding element; The second shortest distance is equal to the first shortest distance; The first guiding 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 magnetic permeability of the second section is greater than the magnetic permeability of the first section.

9. The optical element driving mechanism according to claim 4, wherein The optical element driving mechanism further comprises a fifth magnetic element and a magnetic conductive plate; The movable portion further has a first groove configured to accommodate the fifth magnetic element; The magnetic conductive plate is disposed on the base and is 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 conductive plate; When viewed along the major axis, the first groove is closer to the first guide element than the second guide element; When viewed along the main axis, the first groove is closer to the second contact portion than the first contact portion; When viewed along the major axis, the fifth magnetic element is located inside the triangle.

10. The optical element driving mechanism according to 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; When viewed along the principal axis, the interface passes through a center of gravity of the optical element and the movable portion; The optical element driving mechanism further includes a circuit component and a light shielding element; The circuit component is disposed on the base; The first coil and the second coil are configured to be electrically connected to the circuit component; The shading element is disposed between the movable portion and the magnetic conductive plate; The shading element is made of a light-absorbing material; The optical element driving mechanism further includes a first sensing element and a sensing magnet; The first sensing element and the sensing magnet are respectively disposed on the circuit component and the movable portion; The optical element driving mechanism further includes a protection element disposed between the movable portion and the sensing magnet; The protection element is configured to cover a portion of the sensing magnet; When viewed along the major axis, the protective element has an L-shaped structure; The optical element driving mechanism further includes a first buffer element and a second buffer element, which are disposed on the movable portion; The first cushioning element and the second cushioning element are arranged along the first axial direction; When the movable portion is driven to move to a first limit position, the first buffer element is configured to abut against the base; When the movable portion is driven to move to a second limit position, the second buffer element is configured to abut against the base.

Images