Optical element drive mechanism

Abstract

An optical element driving mechanism has an optical axis, includes a fixed part, a movable part, and a driving assembly, wherein the movable part is connected to the fixed part, and the driving assembly drives the movable part to move relative to the fixed part in a direction parallel to the optical axis. When observed along the direction parallel to the optical axis, the optical element driving mechanism is a rectangular structure, having a first side, a second side, a third side, and a fourth side, wherein the first side is opposite to the third side, and the first side is adjacent to the second side and the fourth side.

Description

Technical Field

[0001] The present disclosure relates to a driving mechanism, and in particular to an optical element driving mechanism. Background Art

[0002] The design of today's electronic devices is constantly developing towards miniaturization, so that various components or structures used in optical modules such as cameras must also be continuously reduced in order to achieve the purpose of miniaturization. In view of this, how to design a miniaturized optical system has become an important issue. Summary of the invention

[0003] One embodiment of the present invention provides an optical element driving mechanism having an optical axis, including a fixed part, a movable part, and a driving component, wherein the movable part is connected to the fixed part, and the driving component drives the movable part to move relative to the fixed part in a direction parallel to the optical axis. When observed along the direction parallel to the optical axis, the optical element driving mechanism is a rectangular structure having a first side, a second side, a third side, and a fourth side, wherein the first side is opposite to the third side, and the first side is adjacent to the second side and the fourth side.

[0004] According to some embodiments of the present disclosure, the movable portion includes a through hole, a receiving groove, a counterweight element, a first groove, and a second groove. The through hole has a center, and the optical axis passes through the center of the through hole. The receiving groove is arranged on the first side and the second side. The counterweight element is arranged in the receiving groove. The first groove is arranged on the first side. The second groove is arranged on the second side. The shortest distance from the center of the through hole to the first side is greater than the shortest distance from the center of the through hole to the third side, and the shortest distance from the center of the through hole to the first side is greater than the shortest distance from the center of the through hole to the fourth side. The shortest distance from the center of the through hole to the second side is greater than the shortest distance from the center of the through hole to the third side, and the shortest distance from the center of the through hole to the second side is greater than the shortest distance from the center of the through hole to the fourth side.

[0005] According to some embodiments of the present disclosure, the fixed portion includes a base, a first circuit component, a second circuit component, and a shell, the first circuit component and the second circuit component are arranged on the base, and the shell is connected to the base, wherein the first circuit component and the second circuit component are electrically independent of each other, the first circuit component is arranged on the first side, the fourth side and the third side, the second circuit component has a plurality of electrical connection elements arranged on the second side, wherein the shell has a grounding element, the grounding element is arranged on the second side, and the grounding element is arranged between the electrical connection elements.

[0006] According to some embodiments of the present disclosure, the optical element driving mechanism also includes a first elastic element and a second elastic element, connecting the movable part and the fixed part, wherein when observed along a direction parallel to the optical axis, the first elastic element and the second elastic element at least partially overlap, wherein the first elastic element has a plurality of fixed part connecting parts, a plurality of movable part connecting parts, a plurality of elastic parts, a plurality of internal auxiliary parts, and a plurality of external auxiliary parts. The plurality of fixed part connecting parts are fixedly connected to the fixed part. The plurality of movable part connecting parts are fixedly connected to the movable part. The plurality of elastic parts have elastic materials, and the movable part connecting parts are movably connected to the fixed part connecting parts via the elastic parts, respectively. The plurality of internal auxiliary parts are arranged on the second side and the fourth side, and are respectively connected to the two movable part connecting parts. The plurality of external auxiliary parts are arranged on the first side, the second side, and the third side, and are respectively connected to the two fixed part connecting parts.

[0007] According to some embodiments of the present disclosure, the second elastic element includes a first part and a second part. The first part has a fixed part connection part, a movable part connection part, an elastic part, and a driving part connection part, wherein the fixed part connection part is fixedly connected to the fixed part, and the movable part connection part is fixedly connected to the movable part. The elastic part has an elastic material, and the movable part connection part is movably connected to the fixed part connection part via the elastic part. The driving part connection part is extended by the movable part connection part and connected to the driving component. The second part has a plurality of fixed part connection parts, a plurality of movable part connection parts, a plurality of elastic parts, and a driving part connection part. A plurality of fixed part connection parts are respectively fixedly connected to the fixed part. A plurality of movable part connection parts are respectively fixedly connected to the movable part. A plurality of elastic parts have an elastic material, and the movable part connection parts are respectively movably connected to the fixed part connection part via the elastic part. The driving part connection part is extended by the movable part connection part and connected to the driving component. The first part is not connected to the second part. The movable part further includes a first winding post and a second winding post, the first winding post and the second winding post are arranged on the first side, the driving component includes a driving coil, the driving coil is arranged on an outer periphery of the movable part, and one end of the driving coil is wound around the first winding post and connected to the driving part connecting part of the first part, and the other end of the driving coil is wound around the second winding post and connected to the driving part connecting part of the second part. A partition is provided between the first winding post and the second winding post, a first accommodating part is formed between the partition and the first winding post, and a second accommodating part is formed between the partition and the second winding post, the first accommodating part accommodates the driving part connecting part of the first part, and the second accommodating part accommodates the driving part connecting part of the second part, wherein the driving part connecting part of the first part and the driving coil wound around the first winding post are connected by a connecting element, and the driving part connecting part of the second part and the driving coil wound around the second winding post are connected by a connecting element, wherein when observed along a direction parallel to the optical axis, the driving part connecting part of the first part does not overlap with the first winding post, and the driving part connecting part of the second part does not overlap with the second winding post.

[0008] According to some embodiments of the present disclosure, the driving portion connecting portion of the first part and the driving coil wound on the first winding post are welded by laser, and the driving portion connecting portion of the second part and the driving coil wound on the second winding post are welded by laser. When observed along a direction parallel to the optical axis, the driving portion connecting portion of the first part overlaps with the first winding post, and the driving portion connecting portion of the second part overlaps with the second winding post.

[0009] According to some embodiments of the present disclosure, the optical element driving mechanism further includes a position sensing component, which is disposed on the second side and includes a reference element and a position sensing element, wherein the position sensing element corresponds to the reference element to sense the movement of the movable part relative to the fixed part. When observed along a direction parallel to the optical axis, the reference element and the position sensing element at least partially overlap.

[0010] According to some embodiments of the present disclosure, the optical element driving mechanism further includes a damping element, the fixed portion includes a base, the base has a recessed portion, the movable portion has a protruding portion, the protruding portion corresponds to the recessed portion, and the damping element is disposed between the protruding portion and the recessed portion. The optical element driving mechanism further includes three other damping elements, the base further has three other recessed portions, the movable portion further has three other protruding portions, the four damping elements, the four recessed portions, and the four protruding portions are respectively disposed at four corners adjacent to the rectangular structure, forming four corresponding sets of stabilizing components. When observed along a direction parallel to the optical axis, the protruding portions, the damping elements, and the recessed portions in any of the four sets of stabilizing components at least partially overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present disclosure can be clearly understood through the detailed description below and in conjunction with the drawings. It is emphasized that, in accordance with standard practice in the industry, various features are not drawn to scale and are only used for illustrative purposes. In fact, in order to be able to clearly illustrate, the size of various features may be arbitrarily enlarged or reduced.

[0012] Figure 1 It is a stereoscopic diagram of an optical element driving mechanism according to an embodiment of the present disclosure.

[0013] Figure 2 Detailed description of an exploded view of an optical element driving mechanism according to an embodiment of the present disclosure.

[0014] Figure 3 1 is a top view of some components of an optical element driving mechanism according to an embodiment of the present disclosure.

[0015] Figure 4 1 is a top view of some components of an optical element driving mechanism according to an embodiment of the present disclosure.

[0016] Figure 5FIG. 4 is a bottom view of some components of an optical element driving mechanism according to an embodiment of the present disclosure.

[0017] Figure 6 It is a three-dimensional diagram of some components of the optical element driving mechanism according to one embodiment of the present disclosure.

[0018] Figure 7 It is a stereoscopic diagram of some components of an optical element driving mechanism according to another embodiment of the present disclosure.

[0019] Figure 8 It is a three-dimensional diagram of some components of the optical element driving mechanism according to one embodiment of the present disclosure.

[0020] Fig. 9 It is a three-dimensional diagram of some components of the optical element driving mechanism according to one embodiment of the present disclosure.

[0021] Fig.10 FIG. 4 is a bottom view of some components of an optical element driving mechanism according to an embodiment of the present disclosure.

[0022] Description of reference numerals:

[0023] 1: Optical element drive mechanism

[0024] 100: Fixed part

[0025] 110: Shell

[0026] 111: Top

[0027] 112: Sidewall

[0028] 113: Grounding element

[0029] 120: Base

[0030] 121: Positioning column

[0031] 122: concave part

[0032] 130: First circuit component

[0033] 140: Second circuit component

[0034] 141: Electrical connection components

[0035] 141a: first electrical connection element

[0036] 141b: second electrical connection element

[0037] 200: Activities Department

[0038] 201: Upper surface

[0039] 202: Lower surface

[0040] 203: Side surface

[0041] 210: Container

[0042] 220: Counterweight element

[0043] 230: First groove

[0044] 240: Second groove

[0045] 250: Positioning unit

[0046] 260: First winding column

[0047] 270: Second winding column

[0048] 280: protrusion

[0049] 290: Divider

[0050] 291: First accommodation part

[0051] 292: Second accommodating portion

[0052] 300: Drive components

[0053] 310: Driving coil

[0054] 320: Magnetic components

[0055] 400: First elastic element

[0056] 401,511,: Fixed part connection part

[0057] 402,512: Active part connection part

[0058] 403,513: Elasticity

[0059] 404,514: Internal Auxiliary Department

[0060] 405: External Auxiliary Department

[0061] 500: Second elastic element

[0062] 510: Part 1

[0063] 515,525: Drive unit connection

[0064] 520: Part 2

[0065] 600: Position sensing component

[0066] 610: Reference Component

[0067] 620: Position sensing element

[0068] 700: Damping element

[0069] C: Center

[0070] D1,D2,D3,D4: shortest distance

[0071] H1: Shell opening

[0072] H2: Base opening

[0073] H3: Through hole

[0074] O: Optical axis

[0075] S1: First side

[0076] S2: Second side

[0077] S3: Third side

[0078] S4: Fourth side DETAILED DESCRIPTION

[0079] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the following embodiments are specifically cited and described in detail with the accompanying drawings. Among them, the configuration of each component in the embodiment is for illustrative purposes and is not intended to limit the present disclosure. In addition, some of the figure numbers in the embodiments are repeated to simplify the description and do not mean the correlation between different embodiments. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referenced to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and are not used to limit the present disclosure.

[0080] In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used in the embodiments to describe the relative relationship of one element to another element in the diagram. It is understood that if the device in the diagram is turned upside down, the element described on the "lower" side will become the element on the "upper" side.

[0081] Here, the terms "about" and "approximately" generally mean within 20%, preferably within 10%, and preferably within 5% of a given value or range. The quantities given here are approximate quantities, meaning that the meaning of "about" and "approximately" can still be implied in the absence of specific instructions.

[0082] Please refer to Figure 1 as well as Figure 2 , Figure 1 4 is a three-dimensional diagram of an optical element driving mechanism 1 according to an embodiment of the present disclosure. Figure 21 is an exploded view of an optical element driving mechanism 1 according to an embodiment of the present disclosure. The optical element driving mechanism 1 has an optical axis O, and includes a fixed portion 100, a movable portion 200, a driving assembly 300, a first elastic element 400, a second elastic element 500, a position sensing assembly 600, and four damping elements 700. When observed along a direction parallel to the optical axis O, the optical element driving mechanism 1 is a rectangular structure, having a first side S1, a second side S2, a third side S3, and a fourth side S4, the first side S1 is opposite to the third side S3, and the first side S1 is adjacent to the second side S2 and the fourth side S4. In the following description, the first side S1, the second side S2, the third side S3, and the fourth side S4 may be a structure including the optical element driving mechanism 1 on the first side S1, the second side S2, the third side S3, and the fourth side S4. In this embodiment, the optical element driving mechanism 1 can be a voice coil motor (VCM) with auto focusing (AF) function, but is not limited to this. In some embodiments, the optical element driving mechanism 1 can also have auto focusing and optical image stabilization (OIS) functions.

[0083] like Figure 2 As shown, the fixing part 100 includes a housing 110, a base 120, a first circuit component 130, and a second circuit component 140. The housing 110 has a top surface 111, four side walls 112 extending from the edge of the top surface 111 in a direction parallel to the optical axis O, and a grounding element 113. The base 120 and the housing 110 are arranged along the optical axis O, and have four positioning columns 121 and four recesses 122. The four positioning columns 121 are arranged at the four corners of the base 120, and the four recesses 122 are respectively arranged adjacent to the aforementioned four positioning columns 121. It should be understood that a shell opening H1 and a base opening H2 are respectively formed on the shell 110 and the base 120. The shell opening H1 corresponds to the base opening H2, and the base opening H2 corresponds to an image sensing element (not shown) disposed outside the optical element driving mechanism 1. External light can enter the shell 110 through the shell opening H1, and then pass through an optical element (not shown) and the base opening H2 before being received by the aforementioned image sensing element to generate a digital image signal.

[0084] The first circuit member 130 and the second circuit member 140 are disposed on the base 120, and the first circuit member 130 and the second circuit member 140 are electrically independent of each other. The first circuit member 130 is disposed on the first side S1, the fourth side S4 and the third side S3. More specifically, the first circuit member 130 has a structure close to a C-shape, extending from the first side S1 through the fourth side S4 to the third side S3, and is embedded in the base 120. In addition to being a path for electrical conduction, the structure of the base 120 can also be strengthened due to its metal material. The second circuit member 140 has six electrical connection elements 141 disposed on the second side S2. The grounding element 113 of the housing 110 is disposed on the second side S2, and the grounding element 113 is disposed between the electrical connection elements 141.

[0085] The movable part 200 can be connected to the optical element and move relative to the fixed part 100 in a direction parallel to the optical axis O. In this embodiment, the movable part 200 is a bearing seat, including a through hole H3, an upper surface 201, a lower surface 202, a side surface 203, a receiving groove 210, a weight element 220, a first groove 230, a second groove 240, a plurality of positioning parts 250, a first winding post 260, a second winding post 270, and four protrusions 280. The upper surface 201 is closer to the top surface 111 of the housing 110 than the lower surface 202. The through hole H3 has a center C, and the optical axis O passes through the center C of the through hole H3. A corresponding locking screw structure is arranged between the through hole H3 and the aforementioned optical element, so that the optical element can be locked in the through hole H3.

[0086] A shortest distance D1 from the center C of the through hole H3 to the first side S1 is greater than a shortest distance D3 from the center C of the through hole H3 to the third side S3, and the shortest distance D1 from the center C of the through hole H3 to the first side S1 is greater than a shortest distance D4 from the center C of the through hole H3 to the fourth side S4. A shortest distance D2 from the center C of the through hole H3 to the second side S2 is greater than the shortest distance D3 from the center C of the through hole H3 to the third side S3, and the shortest distance D2 from the center C of the through hole H3 to the second side S2 is greater than the shortest distance D4 from the center C of the through hole H3 to the fourth side S4, so the optical element driving mechanism 1 in this embodiment is an eccentric structure in which the optical axis O does not pass through the center of the rectangular structure.

[0087] The receiving groove 210 is disposed on the first side S1 and the second side S2. The weight element 220 is disposed in the receiving groove 210. The first groove 230 is disposed on the first side S1. The second groove 240 is disposed on the second side S2. The receiving groove 210, the first groove 230, and the second groove 240 are all recessed structures, which are recessed from the upper surface 201 toward the base 120 along a direction parallel to the optical axis O. Since the movable part 200 is an eccentric structure with its center biased toward the third side S3 and the fourth side S4, the stability of the movable part 200 when moving relative to the fixed part 100 can be improved by arranging the receiving groove 210 spanning the first side S1 and the second side S2 to accommodate the weight element 220, and the first groove 230 and the second groove 240 are arranged near the receiving groove 210 to reduce the overall weight of the movable part 200, so that the movable part 200 can move stably and maintain balance.

[0088] A plurality of positioning portions 250 are respectively disposed on the upper surface 201 and the lower surface 202 of the movable portion 200 to position the first elastic element 400 and the second elastic element 500. The first winding post 260 and the second winding post 270 are disposed on the first side S1. In some embodiments, the first winding post 260 and the second winding post 270 are protruding structures, protruding from the lower surface 202 toward the base 120 along a direction parallel to the optical axis O. In other embodiments, the first winding post 260 and the second winding post 270 protrude from the side surface 203 along a direction perpendicular to the optical axis O toward the side wall 112 of the housing 110.

[0089] The driving assembly 300 includes a driving coil 310 and four magnetic elements 320. The driving coil 310 is disposed on the side surface 203 of the movable part 200. More specifically, the driving coil 310 is wound around the side surface 203 of the movable part 200. The four magnetic elements 320 are respectively disposed in the space formed between the positioning column 121 of the base 120 and the movable part 200, and are fixed to the positioning column 121. The magnetic element 320 can be a magnet, wherein one pole (e.g., N pole) of the magnet faces the driving coil 310. In this embodiment, the driving coil 310 and the four magnetic elements 320 together constitute the driving assembly 300 for driving the movable part 200 to move relative to the fixed part 100. However, it should be understood that although in this embodiment, the number of the magnetic elements 320 is four and arranged at the corners, the number and arrangement of the magnetic elements 320 are not limited thereto.

[0090] Please refer to Figures 2 to 7 , Figure 3 FIG. 1 is a top view of some components of an optical element driving mechanism 1 according to an embodiment of the present disclosure. Figure 4 FIG. 1 is a top view of some components of an optical element driving mechanism 1 according to an embodiment of the present disclosure. Figure 51 is a bottom view of some components of the optical element driving mechanism 1 according to an embodiment of the present disclosure. Figure 6 4 is a three-dimensional diagram of some components of the optical element driving mechanism 1 according to an embodiment of the present disclosure. Figure 7 1 is a perspective view of some components of an optical element driving mechanism 1 according to another embodiment of the present disclosure. The first elastic element 400 and the second elastic element 500 connect the movable part 200 and the fixed part 100, and are arranged along a direction parallel to the optical axis O. When viewed along a direction parallel to the optical axis O, the first elastic element 400 and the second elastic element 500 at least partially overlap. Figure 3 As shown, the first elastic element 400 has four fixed part connecting parts 401, four movable part connecting parts 402, four elastic parts 403, two inner auxiliary parts 404, and three outer auxiliary parts 405. The four fixed part connecting parts 401 of the first elastic element 400 can be fixed on the four magnetic elements 320 by a bonding element (not shown, for example, solder, solder ball, conductive glue, etc.). The four movable part connecting parts 402 can be fixed on the positioning part 250 of the upper surface 201 of the movable part 200 by a bonding element. The elastic part 403 has an elastic material and connects the fixed part connecting part 401 and the movable part connecting part 402. The two inner auxiliary parts 404 are respectively arranged on the second side S2 and the fourth side S4, and the inner auxiliary parts 404 connect the two movable part connecting parts 402. The three outer auxiliary parts 405 are respectively arranged on the first side S1, the second side S2, and the third side S3, and the outer auxiliary parts 405 connect the two fixed part connecting parts 401. The inner auxiliary portion 404 and the outer auxiliary portion 405 may be used to enhance the strength of the first elastic element 400 .

[0091] Since the optical element driving mechanism 1 of the present embodiment is an eccentric structure, the second side S2 with a larger space can be designed to have an elastic part 403, an inner auxiliary part 404, and an outer auxiliary part 405. On the other hand, the fourth side S4 with a smaller space can be designed to have no outer auxiliary part 405, so that the optical element driving mechanism 1 can be minimized while the first elastic element 400 can still have a certain strength and is not easy to break. However, the number and configuration of the above-mentioned fixed part connecting part 401, movable part connecting part 402, elastic part 403, inner auxiliary part 404, and outer auxiliary part 405 are not limited thereto and can be changed as required.

[0092] like Figure 4 as well as Figure 5As shown, the second elastic element 500 includes a first portion 510 and a second portion 520, wherein the first portion 510 and the second portion 520 are not connected, and when viewed along a direction parallel to the optical axis O, the first portion 510 and the second portion 520 do not overlap, and when viewed along a direction perpendicular to the optical axis O, the first portion 510 and the second portion 520 at least partially overlap. The first portion 510 has a fixed portion connecting portion 511, a movable portion connecting portion 512, an elastic portion 513, an internal auxiliary portion 514, and a driving portion connecting portion 515, wherein the fixed portion connecting portion 511 is fixedly connected to the base 120 of the fixed portion 100, and the movable portion connecting portion 512 is fixedly connected to the positioning portion 250 of the lower surface 202 of the movable portion 200. The movable portion connecting portion 512 is movably connected to the fixed portion connecting portion 511 via the elastic portion 513. The internal auxiliary portion 514 connects the movable portion connecting portion 512 and the driving portion connecting portion 515. The driving portion connecting portion 515 is connected to one end of the driving coil 310 of the driving assembly 300 .

[0093] The second part 520 has three fixed part connecting parts 521, four movable part connecting parts 522, three elastic parts 523, four internal auxiliary parts 524, and a driving part connecting part 525. The three fixed part connecting parts 521 are fixedly connected to the base 120 of the fixed part 100. The four movable part connecting parts 522 are fixedly connected to the positioning part 250 of the movable part 200, and the movable part connecting part 522 is movably connected to the fixed part connecting part 521 via the elastic part 523. Three of the four internal auxiliary parts 524 are respectively connected to two movable part connecting parts 522, and the remaining one internal auxiliary part 524 is connected to the movable part connecting part 522 and the driving part connecting part 525. The driving part connecting part 525 is connected to the other end of the driving coil 310 of the driving assembly 300.

[0094] That is, one end of the driving coil 310 is wound around the first winding post 260 and connected to the driving portion connecting portion 515 of the first portion 510, and the other end of the driving coil 310 is wound around the second winding post 270 and connected to the driving portion connecting portion 525 of the second portion 520. Figure 6 As shown, in some embodiments, a partition 290 is set between the first winding pole 260 and the second winding pole 270, a first accommodating portion 291 is formed between the partition 290 and the first winding pole 260, and a second accommodating portion 292 is formed between the partition 290 and the second winding pole 270, the first accommodating portion 291 accommodates the driving portion connecting portion 515 of the first part 510, and the second accommodating portion 292 accommodates the driving portion connecting portion 525 of the second part 520.

[0095] The driving portion connecting portion 515 of the first portion 510 and the driving coil 310 wound on the first winding post 260 may be connected by a connecting element (e.g., solder, solder ball, conductive glue, etc.), and the driving portion connecting portion 525 of the second portion 520 and the driving coil 310 wound on the second winding post 270 may be connected by a connecting element. When viewed along a direction parallel to the optical axis O, the driving portion connecting portion 515 of the first portion 510 does not overlap with the first winding post 260, and the driving portion connecting portion 525 of the second portion 520 does not overlap with the second winding post 270.

[0096] In other embodiments, Figure 7 As shown, the first winding post 260 and the second winding post 270 extend from the side surface 203 toward the side wall 112 along a direction perpendicular to the optical axis O, and the driving portion connecting portion 515 of the first portion 510 and the driving coil 310 wound around the first winding post 260 can be laser welded, and the driving portion connecting portion 525 of the second portion 520 and the driving coil 310 wound around the second winding post 270 can be laser welded. When viewed along a direction parallel to the optical axis O, the driving portion connecting portion 515 of the first portion 510 overlaps with the first winding post 260, and the driving portion connecting portion 525 of the second portion 520 overlaps with the second winding post 270.

[0097] In more detail, after the movable part connecting parts 512 and 522 pass through the positioning part 250, the positioning part 250 is first flattened at high temperature so that the movable part connecting parts 512 and 522 are fixed to the positioning part 250, and the driving part connecting parts 515 and 525 can maintain contact with the driving coil 310 to avoid displacement during subsequent assembly. Since the driving coil 310 and the second elastic element 500 can be made of the same material (for example, copper), no additional connecting element is required, and the driving coil 310 and the second elastic element 500 can be directly connected by laser melting. In addition, in order to increase the contact area between the driving part connecting parts 515 and 525 and the driving coil 310, an area of ​​the driving part connecting parts 515 and 525 can be designed to be larger than a winding area of ​​the driving coil 310 on the first winding post 260 or the second winding post 270, or a width of the first winding post 260 or the second winding post 270 can be designed to be wider.

[0098] In addition, a plurality of holes may be provided on the flat drive unit connection parts 515 and 525. More specifically, these holes are provided near the laser welding part to serve as heat insulation to prevent heat conduction during high-temperature laser welding from affecting other components. In addition, since the first winding post 260 and the second winding post 270 are usually made of plastic, a metal sheet may be embedded in the first winding post 260 and the second winding post 270 to increase the bonding strength during laser welding.

[0099] In the aforementioned Figure 6 In the embodiment, the flat driving portion connecting parts 515, 525 are in line contact with the driving coil 310. Figure 7 In the embodiment, the driving portion connecting parts 515, 525 are in surface contact with the driving coil 310, and have a larger contact area, so they can have a preferred connection strength.

[0100] Back to Figure 2 , the position sensing component 600 is disposed on the second side S2, which is different from the side where the first winding post 260 and the second winding post 270 are disposed, so as to make full use of the space in the optical element driving mechanism 1 and achieve the purpose of minimization. At least a part of the position sensing component 600 is disposed on the movable part 200, and at least another part of the position sensing component 600 is disposed on the fixed part 100. For example, the position sensing component 600 may include a reference element 610 and a position sensing element 620. The reference element 610 may be a magnet disposed on the movable part 200. The position sensing element 620 may be, for example, a Hall effect sensor, a magnetoresistive sensor (MR sensor), a tunnel magnetoresistance effect sensor or a fluxgate sensor, etc., disposed on the base 120 of the fixed part 100, and may sense the magnetic field of the reference element 610 disposed on the movable part 200, thereby obtaining the position of the movable part 200 relative to the base 120. When viewed along a direction parallel to the optical axis, the reference element 610 and the position sensing element 620 at least partially overlap. However, the configuration of the reference element 610 and the position sensing element 620 is not limited thereto. The position sensing element 620 may be disposed on the movable portion 200 and the reference element 610 may be disposed on the fixed portion 100.

[0101] Please refer to Figure 8 as well as Fig. 9 , Figure 8 4 is a three-dimensional diagram of some components of the optical element driving mechanism 1 according to an embodiment of the present disclosure. Fig. 9: is a three-dimensional diagram of some components of the optical element driving mechanism 1 according to an embodiment of the present disclosure. The damping element 700 is arranged between the protrusion 280 of the movable part 200 and the recess 122 of the base 120. In some embodiments, four damping elements 700, four recesses 122, and four protrusions 280 are respectively arranged at four corners adjacent to the rectangular structure to form four groups of stable components. When observed along a direction parallel to the optical axis O, the protrusion 280, the damping element 700, and the recess 122 in any of the four groups of stable components at least partially overlap. In more detail, in this embodiment, the damping element 700 is arranged on a surface of the recess 122 so that a bottom surface of the protrusion 280 contacts the damping element 700. However, it is not limited to this. In other embodiments, the damping element 700 can be arranged on a side surface of the recess 122 so that a side surface of the protrusion 280 contacts the damping element 700. Both of the above configurations can enhance the stability of the movable part 200 during movement and reduce resonance.

[0102] Please refer to Figure 2 , Figure 4 , Figure 6 ,as well as Fig.10 Explain the electrical connection of the optical element driving mechanism 1, Fig.10 FIG. 1 is a bottom view of some components of the optical element driving mechanism 1 according to an embodiment of the present disclosure. Fig.10 As shown, the six electrical connection elements 141 include a first electrical connection element 141a and a second electrical connection element 141b, the first electrical connection element 141a is connected to the first part 510 of the second elastic element 500, and the second electrical connection element 141b is connected to the second part 520 of the second elastic element 500. A current is input to the first electrical connection element 141a, and the current flows to the driving coil 310 through the first part 510, and then flows to the second part 520 through the driving coil 310, and is output by the second electrical connection element 141b. Through the optical element driving mechanism 1 disclosed in the present invention, since the input and output of the current are both located on the same side, not only the space on the wider side is fully utilized, but also the number of assembly welding times can be reduced when it is subsequently assembled with other optical element driving mechanisms. Therefore, the subsequent assembly production efficiency is improved.

[0103] As described above, the embodiment of the present disclosure provides an optical element driving mechanism having an optical axis, including a fixed portion, a movable portion, and a driving assembly, wherein the movable portion is connected to the fixed portion, and the driving assembly drives the movable portion to move relative to the fixed portion in a direction parallel to the optical axis. When observed along the direction parallel to the optical axis, the optical element driving mechanism is a rectangular structure having a first side, a second side, a third side, and a fourth side, wherein the first side is opposite to the third side, and the first side is adjacent to the second side and the fourth side. And because it is eccentric to two sides, the optical element driving mechanism can be ultra-thin on these two sides. The special position and size relationship of each element disclosed in the present invention can not only make the optical system ultra-thin in a specific direction and miniaturized as a whole, but also can further improve the optical quality (such as shooting quality or depth sensing accuracy, etc.) of the optical system by matching different optical modules.

[0104] Although the embodiments of the present invention and their advantages have been disclosed as above, it should be understood that any person skilled in the art can make changes, substitutions and modifications without departing from the concept and scope of the present invention. In addition, the scope of protection of the present invention 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 invention that the processes, machines, manufactures, material compositions, devices, methods and steps currently or developed in the future can be used according to the present invention as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein. Therefore, the scope of protection of the present invention includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present invention also includes the combination of each claim and embodiment.

Claims

1. An optical element driving mechanism having an optical axis, comprising: a fixing portion; a movable portion connected to the fixed portion; as well as a driving assembly, driving the movable portion to move relative to the fixed portion in a direction parallel to the optical axis; When viewed along the direction parallel to the optical axis, the optical element driving mechanism is a rectangular structure having a first side, a second side, a third side, and a fourth side, the first side is opposite to the third side, and the first side is adjacent to the second side and the fourth side, The activities include: a through hole having a center, the optical axis passing through the center of the through hole; A receiving groove is disposed on the first side and the second side; A weight element is disposed in the container; a first groove disposed on the first side, and a second groove, disposed on the second side, wherein a shortest distance from the center of the through hole to the first side is greater than a shortest distance from the center of the through hole to the third side, and the shortest distance from the center of the through hole to the first side is greater than a shortest distance from the center of the through hole to the fourth side, The shortest distance from the center of the through hole to the second side is greater than the shortest distance from the center of the through hole to the third side, and the shortest distance from the center of the through hole to the second side is greater than the shortest distance from the center of the through hole to the fourth side.

2. An optical element driving mechanism as described in claim 1, wherein the fixed portion includes a base, a first circuit component, a second circuit component, and a housing, the first circuit component and the second circuit component are arranged on the base, and the housing is connected to the base, wherein the first circuit component and the second circuit component are electrically independent of each other, the first circuit component is arranged on the first side, the fourth side and the third side, the second circuit component has a plurality of electrical connection elements arranged on the second side, wherein the housing has a grounding element, the grounding element is arranged on the second side, and the grounding element is arranged between the plurality of electrical connection elements.

3. The optical element driving mechanism as claimed in claim 1, further comprising a first elastic element and a second elastic element, connecting the movable portion and the fixed portion, wherein when viewed along the direction parallel to the optical axis, the first elastic element and the second elastic element at least partially overlap, wherein the first elastic element has: A plurality of fixing portion connecting portions fixedly connecting the fixing portions; A plurality of movable part connecting parts, fixedly connecting the movable parts; A plurality of elastic parts, having an elastic material, wherein the plurality of movable part connecting parts are movably connected to the plurality of fixed part connecting parts via the plurality of elastic parts; a plurality of inner auxiliary parts, disposed on the second side and the fourth side, and each inner auxiliary part is connected to two movable part connecting parts; and A plurality of external auxiliary parts are arranged on the first side, the second side, and the third side, and each of the external auxiliary parts is connected to two fixing part connecting parts.

4. The optical element driving mechanism as claimed in claim 3, wherein the second elastic element comprises: A first part, comprising: a fixing portion connecting portion fixedly connected to the fixing portion; a movable part connecting part, fixedly connected to the movable part; an elastic portion having an elastic material, wherein the movable portion connecting portion is movably connected to the fixed portion connecting portion via the elastic portion; and a driving portion connecting portion extending from the movable portion connecting portion and connected to the driving assembly; and A second part, comprising: A plurality of fixing portion connecting portions fixedly connecting the fixing portions; A plurality of movable part connecting parts, fixedly connecting the movable parts; A plurality of elastic parts, having an elastic material, wherein the plurality of movable part connecting parts are movably connected to the plurality of fixed part connecting parts via the plurality of elastic parts; and a driving portion connecting portion extending from the movable portion connecting portion and connected to the driving assembly; wherein the first portion is not connected to the second portion; The movable part further includes a first winding post and a second winding post, the first winding post and the second winding post are arranged on the first side, the driving component includes a driving coil, the driving coil is arranged on a side surface of the movable part, and one end of the driving coil is wound around the first winding post and connected to the driving part connecting part of the first part, and the other end of the driving coil is wound around the second winding post and connected to the driving part connecting part of the second part.

5. An optical element driving mechanism as described in claim 4, wherein a partition is provided between the first winding post and the second winding post, a first accommodating portion is formed between the partition and the first winding post, and a second accommodating portion is formed between the partition and the second winding post, the first accommodating portion accommodates the driving portion connecting portion of the first part, and the second accommodating portion accommodates the driving portion connecting portion of the second part, wherein the driving portion connecting portion of the first part and the driving coil wound on the first winding post are connected by a connecting element, and the driving portion connecting portion of the second part and the driving coil wound on the second winding post are connected by another connecting element, wherein when observed along the direction parallel to the optical axis, the driving portion connecting portion of the first part does not overlap with the first winding post, and the driving portion connecting portion of the second part does not overlap with the second winding post.

6. An optical element driving mechanism as described in claim 4, wherein the driving part connecting portion of the first part and the driving coil wound on the first winding pole are laser welded, and the driving part connecting portion of the second part and the driving coil wound on the second winding pole are laser welded, wherein when observed along the direction parallel to the optical axis, the driving part connecting portion of the first part overlaps with the first winding pole, and the driving part connecting portion of the second part overlaps with the second winding pole.

7. The optical element driving mechanism as claimed in claim 1, further comprising a position sensing component disposed on the second side, comprising: a reference element; as well as a position sensing element corresponding to the reference element to sense the movement of the movable part relative to the fixed part; When viewed along the direction parallel to the optical axis, the reference element and the position sensing element at least partially overlap.

8. The optical element driving mechanism as described in claim 1 further includes a damping element, wherein the fixed part includes a base, the base has a recessed portion, the movable part has a protruding portion, the protruding portion corresponds to the recessed portion, and the damping element is disposed between the protruding portion and the recessed portion.

9. The optical element driving mechanism as claimed in claim 8, further comprising three other damping elements, wherein the base further comprises three other recesses, the movable portion further comprises three other protrusions, and the four damping elements, the four recesses, and the four protrusions are respectively disposed adjacent to four corners of the rectangular structure to form four sets of stabilizing components; Wherein, when viewed along the direction parallel to the optical axis, the protrusion, the damping element, and the recess in any one of the four groups of stabilizing components at least partially overlap.

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