CN214409531U

CN214409531U - Optical element driving mechanism

Info

Publication number: CN214409531U
Application number: CN202022634657.7U
Authority: CN
Inventors: 王照熙; 张鹤龄; 张哲维; 翁智伟
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2020-04-29
Filing date: 2020-11-13
Publication date: 2021-10-15
Anticipated expiration: 2030-11-13
Also published as: CN215416062U; CN213365151U; CN215340558U; CN215340496U; CN215449772U; CN214474349U; CN216013833U; CN212160201U; CN216013835U

Abstract

The present disclosure provides an optical element driving mechanism. The optical element driving mechanism comprises a movable part, a fixed part, a first driving assembly and a pre-pressure assembly. The movable part comprises an optical element and can move relative to the fixed part. The first driving component is used for driving the movable part to move relative to the fixed part. The pre-pressure component is used for positioning the movable part at a first position relative to the fixed part when the first driving component does not act.

Description

Optical element driving mechanism

Technical Field

The disclosed embodiments relate to an optical element driving mechanism, and more particularly, to an optical element driving mechanism provided with a pre-press assembly.

Background

With the progress of technology, the applications of electronic devices are becoming more and more popular. At present, electronic devices having a camera or video recording function are becoming the mainstream in the market. In these electronic devices, it is common to have a shutter mechanism to control an exposure time to capture a high-quality image or images. However, existing shutter mechanisms are not satisfactory in all respects, and there is still room for improvement.

SUMMERY OF THE UTILITY MODEL

Embodiments of the present disclosure provide an optical element driving mechanism to solve at least one of the above problems.

The disclosed embodiment provides an optical element drive mechanism, including: the movable part, the fixed part, the first driving component and the pre-pressure component. The movable part comprises an optical element and can move relative to the fixed part. The first driving component is used for driving the movable part to move relative to the fixed part. The pre-pressure component is used for positioning the movable part at a first position relative to the fixed part when the first driving component does not act.

According to one embodiment of the present disclosure, a first coil; a first magnetic element for generating magnetic force and corresponding to the first coil; and a first magnetic conductive element having magnetic conductive material and corresponding to the first coil, wherein: the first coil is arranged on the first magnetic conduction element; the first coil is wound on the first magnetic conduction element, and the first magnetic conduction element is provided with a strip structure extending along a first direction; the fixing part at least partially exposes the first coil when viewed from a direction perpendicular to the first direction. According to one embodiment of the present disclosure, an adhesive is disposed between the fixing portion and the first coil; the first coil is positioned between the first magnetic element and the adhesive; the fixing part is provided with an opening for accommodating the first coil; and the adhesive is arranged at the opening.

According to one embodiment of the present disclosure, the pre-press assembly further includes a first pre-press element having magnetic permeability and corresponding to the first magnetic element, wherein: when the movable part is located at the first position relative to the fixed part, the first pre-pressure element and the first magnetic element generate a first acting force, so that the movable part is located at the first position relative to the fixed part when the first driving component is not actuated; the first pre-stressing element is fixedly connected with the first coil; the first pre-pressure element is fixedly connected with the first magnetic conduction element; the first pre-pressure element is directly contacted with the first magnetic conduction element; the first pre-pressing element is provided with a strip-shaped structure extending along a second direction; the first direction is different from the second direction; the first direction is perpendicular to the second direction; the direction of the first acting force is not parallel to the first direction or the second direction; the direction of the first acting force is not perpendicular to the first direction or the second direction; a connecting line between the center of the first pre-stress element and the center of the first magnetic element is not parallel to the first direction or the second direction; and the connection line is not perpendicular to the first direction or the second direction.

According to one embodiment of the disclosure, the first pre-stressing element is not lower than the first coil in the second direction; the first pre-pressure element is higher than the first coil in the second direction; the first pre-stressing element exceeds the contour of the first coil, viewed in the first direction; when the movable part is located at the first position, a first distance is reserved between the first pre-pressure element and the first magnetic element; when the movable part is located at the first position, a second distance is reserved between the first pre-pressing element and the first coil; the first distance is greater than or equal to the second distance; the fixed part also comprises a first spacing piece, and when the movable part is positioned at the first position, the first spacing piece is positioned between the first pre-pressure element and the first magnetic element; and when the movable part is positioned at the first position, the first pre-pressure element is not in direct contact with the first magnetic element.

According to one embodiment of the present disclosure, a carrier configured to carry the first magnetic element; the bearing seat is connected to the optical element; the bearing seat is at least partially positioned between the first pre-pressure element and the first magnetic element; the bearing seat at least partially exposes the first magnetic element to the first pre-pressure element; when the movable part is located at the first position, the bearing seat is directly contacted with the first pre-pressure element; and the first spacing piece and the bearing seat are of an integrated structure.

According to one embodiment of the present disclosure, the pre-stress assembly is connected to the first magnetic conductive element; the pre-pressure component is in direct contact with the first magnetic conduction element; and the pre-pressure component and the first magnetic conduction element are integrally formed.

According to one embodiment of the present disclosure, the pre-pressure assembly is configured to position the movable portion at a second position relative to the fixed portion when the first driving assembly is not actuated, wherein the pre-pressure assembly further includes: a second pre-pressure element having magnetic conductivity material and corresponding to the first magnetic element, wherein: when the movable part is located at the second position relative to the fixed part, the second pre-pressure element and the first magnetic element generate a second acting force, so that the movable part is located at the second position relative to the fixed part when the first driving component is not actuated; the second pre-stressing element is fixedly connected with the first coil; the second pre-pressure element is fixedly connected with the first magnetic conduction element; the second pre-pressure element is directly contacted with the first magnetic conduction element; the second pre-pressing element is provided with an elongated structure and extends along the second direction; the direction of the second acting force is not parallel to the first direction or the second direction; the direction of the second acting force is not perpendicular to the first direction or the second direction; the direction of the first acting force is different from the direction of the second acting force; the direction of the first acting force is not parallel to the direction of the second acting force; the direction of the first acting force is not perpendicular to the direction of the second acting force; a connecting line between the center of the second pre-stress element and the center of the first magnetic element is not parallel to the first direction or the second direction; and the connecting line of the center of the second pre-stress element and the center of the first magnetic element is not perpendicular to the first direction or the second direction.

According to one embodiment of the disclosure, the second pre-stressing element is not lower than the first coil in the second direction; the second pre-pressure element is higher than the first coil in the second direction; the second pre-stressing element exceeds the contour of the first coil, viewed in the first direction; when the movable part is located at the second position, a third distance is reserved between the second pre-pressure element and the first magnetic element; when the movable part is located at the second position, a fourth distance is reserved between the first pre-pressure element and the first coil; the third distance is greater than or equal to the fourth distance; the fixed part also comprises a second spacing piece which is positioned between the second prepressing element and the first magnetic element when the movable part is positioned at the second position; and when the movable part is positioned at the second position, the second pre-pressure element is not in direct contact with the first magnetic element.

According to one embodiment of the present disclosure, a positioning component is used for positioning the movable portion at the first position relative to the fixed portion when the first driving component is not actuated; and a second driving assembly for driving the positioning assembly to move relative to the fixing portion, the second driving assembly comprising: a second coil; a second magnetic element for generating magnetic force and corresponding to the second coil; and a second magnetic conductive element having magnetic conductive material and corresponding to the second coil, wherein: when the movable part is located at the first position relative to the fixed part, the positioning component is not directly contacted with the optical element; the first driving assembly is used for driving the movable part to move along the first direction, and when the movable part is observed along the second direction, the first pre-pressure element is positioned between the first driving assembly and the second driving assembly; when viewed along the first direction, the first driving assembly and the second driving assembly are at least partially overlapped; the second drive assembly at least partially overlaps the first pre-stressing element when viewed in the first direction; and the fixed part is positioned between the pre-pressure component and the second driving component.

The beneficial effect of the disclosed embodiment is that the disclosed embodiment provides an optical element driving mechanism provided with a pre-pressure assembly. The acting force (such as a magnetic force) generated by the pre-pressure component and the magnetic element can position the movable part at a specific position relative to the fixed part when the first driving component is not actuated, thereby avoiding abnormal operation of the optical element driving mechanism and being beneficial to reducing the probability of the failure of the optical element driving mechanism. In addition, the driving unit and the pre-press unit are at least partially overlapped, so that the optical element driving mechanism can be miniaturized. A fixing part is arranged between the pre-pressure assembly and the driving assembly, so that electromagnetic interference between the pre-pressure assembly and the driving assembly can be avoided.

Drawings

The concepts of the embodiments of the present disclosure will be better understood from the following detailed description when considered in conjunction with the accompanying drawings. It should be noted that, in accordance with the standard practice in the industry, the various features of the drawings are not necessarily drawn to scale. In fact, the dimensions of the various features may be arbitrarily expanded or reduced for clarity of presentation. Like reference numerals are used to denote like features throughout the specification and drawings.

Fig. 1 illustrates a perspective view of an optical element drive mechanism according to some embodiments of the present disclosure.

Fig. 2 shows an exploded view of the optical element driving mechanism according to fig. 1.

Fig. 3-8 illustrate cross-sectional views of optical element drive mechanisms according to some embodiments of the present disclosure.

Fig. 9 illustrates a bottom view of an optical element drive mechanism according to some embodiments of the present disclosure.

The reference numbers are as follows:

20 optical element driving mechanism

310 main body

311 first optical aperture

313 the first accommodating part

315 first opening

316 first side wall

317 second side wall

318 recess of

319 convex column

320: top cover

321 second optical aperture

323 a second accommodating part

325 second opening

329 positioning hole

340 the first magnetic conduction part

350 first coil

360 first magnetic element

370 second magnetic conduction part

380 second coil

390 second magnetic element

400 elastic element

410 bottom cover

420 pre-pressure assembly

421 first prepressing element

422 second pre-stressing element

C3 bobbin

E3 first drive Assembly

E4 second drive Assembly

M3 bearing seat

M4 positioning assembly

O' optical axis

R is an optical element

R1 third containing part

R2 fourth accommodating part

R3 third opening

Detailed Description

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

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

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, materials and/or sections, these elements, materials and/or sections should not be limited by these terms, and these terms are only used to distinguish one element, material and/or section from another element, material and/or section. Thus, a first element, material, and/or section discussed below could be termed a second element, material, and/or section without departing from the teachings of some embodiments of the present disclosure, and unless specifically defined, any first or second element, material, and/or section recited in a claim may be understood to be any element, material, and/or section in the specification that conforms to the claims.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. Furthermore, the terms "substantially", "about" or "approximately" are also recited herein, and are intended to cover both substantially and completely consistent conditions or ranges. It should be noted that, unless otherwise defined, even if the above-mentioned terms are not described in the description, they should be interpreted in the same sense as if the above-mentioned approximate terms were described.

Fig. 1 illustrates a perspective view of an optical element drive mechanism 20 according to some embodiments of the present disclosure. It should be noted that, in the present embodiment, the optical element driving mechanism 20 is, for example, a shutter mechanism, and may be disposed in an electronic device (not shown) having a camera function, and may drive the optical element by the optical element driving mechanism. By controlling the position of the optical element, light can pass through or block the light, and the exposure time of the camera module of the electronic device can be controlled.

Fig. 2 shows an exploded view of the optical element driving mechanism 20 according to fig. 1. As shown in fig. 2, the optical element driving mechanism 20 may include: the device comprises a bearing seat M3, a fixing part F, a first driving assembly E3, a positioning assembly M4 and a second driving assembly E4. In the present embodiment, the fixing portion F includes: a body 310, a top cover 320, and a bottom cover 410. The top cover 320 and the bottom cover 410 are connected to the body 310, and the body 310 may be located between the top cover 320 and the bottom cover 410. The body 310 may be configured to support the bearing seat M3 (which may form a movable portion with the optical element R) and connect with the optical module L.

In some embodiments, the body 310 has a recess 318 and a pillar 319 protruding from the recess 318, and a rounded corner is formed between the pillar 319 and the recess 318. In this way, the protruding pillars 319 can be effectively disposed in the positioning holes 329 of the top cover 320, and the top cover 320 can be more precisely disposed on the body 310. In some embodiments, the fixing portion F and the optical module L may be fixedly disposed on a substrate (not shown). In some embodiments, the optical element driving mechanism 20 is not in direct contact with the optical module L, but the present disclosure is not limited thereto.

The maximum dimension of the optical element driving mechanism 20 is larger than the maximum dimension of the optical module L in a direction parallel to the optical axis O'. For example, the height of the optical element driving mechanism 10 along the optical axis O 'is greater than the height of the optical module L along the optical axis O'. Further, the optical element R may comprise a baffle comprising SOMA or any other suitable light blocking material. The optical module L may include a camera module, which includes a lens or any other suitable light-transmitting material to allow light to pass through in a direction substantially parallel to the optical axis O', thereby achieving a camera function. However, the present disclosure is not limited thereto.

The holder M3 can be used to connect to an optical element R, wherein the optical element R can be used to block light (e.g., light traveling in a direction substantially parallel to the optical axis O'). The carriage M3 can move along the X axis (i.e. the first direction) relative to the fixed portion F. The first driving assembly E3 is used for driving the carriage M3 to move substantially along the X axis (i.e., the first direction) relative to the fixed portion F. In the present embodiment, the first driving assembly E3 includes a first magnetic conductive member 340, a first coil 350 wound around the first magnetic conductive member 340, and a first magnetic element 360 corresponding to the first coil 350. In the present embodiment, the first coil 350 has a winding axis C3, which is substantially parallel to the X axis.

In some embodiments, the first driving assembly E3 can move the carriage M3 (and the connected optical element R) between a first position (also referred to as a first limit position) and a second position (also referred to as a second limit position). For example, the first and second locations may be aligned along an X-axis (i.e., a line connecting the first and second locations may be substantially parallel to the X-axis). That is, the line connecting the first position and the second position is different from the optical axis O' (Z axis). In some embodiments, a line connecting the first position and the second position (e.g., the X-axis) is substantially perpendicular to the optical axis O' (e.g., the Z-axis).

The positioning component M4 can be used to fix the optical element R at a first position or a second position relative to the fixing portion F. The second driving assembly E4 can be used to drive the positioning assembly M4 to move substantially along the Z-axis (i.e., the second direction) relative to the fixing portion F. It can be seen that the direction of movement of the positioning assembly M4 is different from the direction of movement of the optical element R. In some embodiments, the direction of movement of the positioning assembly M4 is substantially perpendicular to the direction of movement of the optical element R. In some embodiments, the positioning element M4 can be configured to fix the optical element R at the first position or the second position relative to the fixing portion F when the first driving element E3 is not actuated.

In this embodiment, the optical element driving mechanism 20 further includes an elastic element 400 abutting against the positioning element M4 and driving the positioning element M4 to move relative to the fixing portion F. The elastic member 400 may be disposed on the bottom cover 410. In some embodiments, the elastic element 400 can drive the positioning component M4 to move in a second direction (e.g., parallel to the Z axis) relative to the fixing portion F. More specifically, the elastic member 400 may continuously apply an elastic force parallel to the second direction (e.g., toward the top cover 320) to the positioning assembly M4.

Fig. 3-8 illustrate cross-sectional views of an optical element drive mechanism 20 according to some embodiments of the present disclosure. As shown in fig. 3, the body 310 has a first optical hole 311 corresponding to the optical module L. The top cover 320 has a second optical hole 321 corresponding to the optical module L and the first optical hole 311. In some embodiments, the first optical aperture 311 is shaped differently than the second optical aperture 321. As shown in fig. 3, the optical element R is located at the second position. At this time, the optical element R completely overlaps the first optical hole 311 and the second optical hole 321. Thus, the optical element R can block the light and prevent the light from entering the optical module L (as shown in fig. 2) through the optical axis O'.

In addition, the body 310 has a first accommodating portion 313 for accommodating the positioning component M4. The top cover 320 has a second receiving portion 323 for receiving the positioning assembly M4. In the present embodiment, the size of the first receiving portion 313 is substantially equal to the size of the second receiving portion 323. In some embodiments, the size of the first receiving portion 313 is smaller than the size of the second receiving portion 323. Further, the optical element R has a third container portion R1 and a fourth container portion R2, which correspond to the positioning module M4, respectively. When the optical element R is located at the second position (i.e. completely overlapped with the first optical hole 311 and the second optical hole 321), the positioning assembly M4 passes through the fourth accommodating portion R2.

As shown in fig. 3, the optical element R is located between the body 310 and the top cover 320. The size of the fourth receiving part R2 is larger than the size of the first receiving part 313 or the size of the second receiving part 323 as viewed from the moving direction (e.g., parallel to the Z-axis) of the positioning member M4. As such, the gap between the positioning component M4 and the optical element R is smaller than the gap between the optical element R and the fixing portion F (e.g., the body 310 and the top cover 320). With this configuration, the probability of the positioning element M4 failing to move normally due to the contact between the positioning element M4 and the optical element R can be reduced. For example, the first accommodating portion 313 has a concave structure to provide a space for the positioning component M4 to move. For example, the first, second, third, and fourth

accommodating parts

313, 323, R1, and R2 are rectangular, but the present disclosure is not limited thereto. In some embodiments, first container 313, second container 323, third container R1, and fourth container R2 may be any shape corresponding to positioning assembly M4, so long as positioning assembly M4 is received.

In addition, the body 310 has a first opening 315 for accommodating the carrier M3, and the first driving element E3 (including the first magnetic conductive member 340, the first coil 350 and the first magnetic element 360) drives the carrier M3 to move in the first opening 315. The top cover 320 has a second opening 325 for receiving the carriage M3, and the first driving assembly E3 drives the carriage M3 to move in the second opening 325. In some embodiments, the first opening 315 is a different size than the second opening 325. In some embodiments, the size of the first opening 315 is greater than the size of the second opening 325.

The optical element R has a third opening R3 corresponding to the carrier M3. In some embodiments, the carrying seat M3 can be sleeved in the third opening R3. In some embodiments, the size of the first opening 315 is different from the size of the third opening R3. In some embodiments, the size of the first opening 315 is greater than the size of the third opening R3. In some embodiments, the size of the second opening 325 is different from the size of the third opening R3. In some embodiments, the size of the second opening 325 is greater than the size of the third opening R3. As can be seen from fig. 2, the size of the first opening 315 is different from the size of the first receiving portion 313. In some embodiments, the size of the first opening 315 is greater than the size of the first receiving portion 313. The first opening 315 has a first sidewall 316 and a second sidewall 317 opposite the first sidewall 316. The first side wall 316 and the second side wall 317 can form a stop portion for limiting the movement of the carriage M3 relative to the fixing portion F within a movement range. When the positioning assembly M4 is located at the second position, the carriage M3 abuts against the first sidewall 316.

As shown in fig. 3, when the carrier M3 is located at the second position, the optical element R completely covers the second optical hole 321 when viewed along the second direction (e.g., the Z axis), such that the first optical hole 311 is not exposed at all from the second optical hole 321. At this time, the bearing seat M3 may contact the first sidewall 316, or the fixing portion F (e.g., the body 310) may contact the stop structure on the bearing seat M3. When the bearing seat M3 directly contacts the fixing portion F, the optical element R does not contact the fixing portion F. Thus, the probability of damage caused by mutual impact between the optical element R and the fixing part F can be reduced. In the present embodiment, the optical element R and the positioning element M4 have a non-zero gap, i.e., the optical element R and the positioning element M4 are not in direct contact.

Since the elastic element 400 continuously applies an upward elastic force to the positioning assembly M4, the positioning assembly M4 can protrude from the first accommodating portion 313 and the fourth accommodating portion R2, so that the optical element R is fixed at the second position and keeps blocking the light entering the optical module L through the optical axis O'. Therefore, the probability of failure of the optical element R caused by external impact can be reduced.

Next, as shown in fig. 4, the second driving assembly E4 can drive the positioning assembly M4 to move downward, so that the positioning assembly M4 leaves the fourth accommodating portion R2. In this embodiment, the second driving assembly E4 may include a second magnetic conducting member 370 made of a magnetic conducting material, a second coil 380 and a second magnetic element 390. An electrical signal may be transmitted to the second coil 380 causing the second magnetically permeable member 370 to generate a magnetic force corresponding to the second magnetic element 390. In this way, the second magnetic conducting member 370 and the second magnetic element 390 generate a downward force, so that the second magnetic element 390 can counteract the elastic force generated by the elastic element 400 to drive the positioning assembly M4 to move downward. In other words, the maximum driving force generated by the second driving assembly E4 is greater than the elastic force exerted by the elastic element 400.

Next, as shown in FIG. 5, the first driving assembly E3 can drive the carrier M3 and the optical element R to move away from the second position to the first position. More specifically, an electrical signal can be transmitted to the first coil 350, so that the first magnetic conductive member 340 made of magnetic material generates a magnetic force corresponding to the first magnetic element 360. In this way, the first magnetic conducting member 340 generates a force with the first magnetic element 360 to drive the supporting seat M3 connected to the first magnetic element 360 and the optical element R away from the second position. At this time, the optical element R does not overlap the first optical hole 311 and the second optical hole 321. Thus, the light can enter the optical module L through the optical axis O'. Further, the positioning member M4 partially overlaps the top cover 320 as viewed from a direction (e.g., Z-axis) perpendicular to the moving direction of the optical element R.

In order to ensure that the carriage M3 and the optical element R move after the positioning assembly M4 leaves the fourth receiving portion R2, an electrical signal may be transmitted to the second coil 380 before the electrical signal is transmitted to the first coil 350. For example, the time difference for transmitting the electrical signal to the first coil 350 and the second coil 380 may be between about 1ms and about 10ms, such as about 5ms, but the disclosure is not limited thereto. Through the design, the probability of damage caused by mutual collision of the positioning component M4 and the optical element R can be reduced.

As shown in fig. 6, after the optical element R reaches the first position (e.g., when the carrier M3 abuts against the second sidewall 317), the elastic element 400 can drive the positioning assembly M4 to move upward, so that the positioning assembly M4 passes through the third accommodating portion R1. The size of the third accommodating part R1 is larger than the size of the first accommodating part 313 or the size of the second accommodating part 323 as viewed from the moving direction (e.g., parallel to the Z-axis) of the positioning member M4.

Similarly, to ensure that the positioning assembly M4 moves after the carriage M3 abuts against the second sidewall 317, the electrical signal transmitted to the second coil 180 may be stopped after the electrical signal is transmitted to the first coil 350. For example, the time difference between transmitting the electric signal to the first coil 150 and stopping transmitting the electric signal to the second coil 180 may be between about 1ms and about 10ms, for example, about 5ms, but the disclosure is not limited thereto. By the above design, the possibility of damage caused by the collision between the positioning component M4 and the optical element R can be reduced.

As shown in fig. 6, when the carrier M3 is located at the first position, the optical element R does not block the second optical hole 321 when viewed along the second direction (e.g., the Z axis), such that the first optical hole 311 is completely exposed from the second optical hole 321. At this time, the bearing seat M3 may contact the second sidewall 317, or the fixing portion F (e.g., the body 310) may contact the stop structure on the bearing seat M3. The bearing seats M3 are located between the stop structures, which are arranged along the first direction (e.g., X axis), when viewed along the second direction.

Similarly, when the bearing seat M3 directly contacts the fixing portion F, the optical element R does not contact the fixing portion F. Thus, the probability of damage caused by mutual impact between the optical element R and the fixing part F can be reduced. In the present embodiment, the optical element R and the positioning element M4 have a non-zero gap, i.e., the optical element R and the positioning element M4 are not in direct contact.

As shown in fig. 7, the optical element driving mechanism 20 further includes a pre-press assembly 420 configured to be operated when the first driving assembly E3 is not operated. The movable part (including the bearing seat M3 and the optical element R) is positioned at a first position or a second position relative to the fixed part F. In this embodiment, the pre-press assembly 420 further includes a first pre-press element 421 and a second pre-press element 422, both of which are made of magnetic materials and correspond to the first magnetic element 360. As shown in fig. 7, when the movable portion is located at the first position relative to the fixed portion F, the first pre-pressure element 421 and the first magnetic element 360 generate a first acting force (e.g., a magnetic force) to position the movable portion at the first position relative to the fixed portion F when the first driving component E3 is not activated, so as to prevent the optical element driving mechanism 20 from operating abnormally.

In some embodiments, the first pre-stressing element 421 is fixedly connected with the first coil 350. In some embodiments, the first pre-stress element 421 is fixedly connected to the first magnetic permeable element 340 and is in direct contact with the first magnetic permeable element 340. In some embodiments, the first pre-stress element 421 and the first magnetic permeable element 340 are integrally formed. In some embodiments, the first pre-stress element 421 has an elongated structure extending along a second direction (e.g., Z-axis), wherein the second direction is different from the first direction (e.g., X-axis) along which the first magnetic conductive element 340 extends. In some embodiments, the first direction is perpendicular to the second direction. As shown in fig. 7, the first pre-stressing element 421 is not lower than the first coil 350 in the second direction. In some embodiments, the first pre-stressing element 421 is higher than the first coil 350 in the second direction. In other words, the first pre-stressing element 421 exceeds the contour of the first coil 350, as seen in the first direction.

In some embodiments, the center of the first pre-stress element 421 and the center of the first magnetic element 360 do not lie on the same horizontal plane (e.g., X-Y plane). In other words, a connection line between the center of the first pre-stress element 421 and the center of the first magnetic element 360 is not parallel to the first direction or the second direction, and is not perpendicular to the first direction or the second direction. In this way, the direction of the first acting force generated by the first pre-pressure element 421 and the first magnetic element 360 (which is substantially parallel to the connection line between the center of the first pre-pressure element 421 and the center of the first magnetic element 360) is not parallel to the first direction or the second direction, and is not perpendicular to the first direction or the second direction.

When the movable portion is located at the first position, there is a first spacer located between the first pre-press element 421 and the first magnetic element 360, so that the first pre-press element 421 and the first magnetic element 360 are not in direct contact. In some embodiments, the bearing block M3 is at least partially located between the first pre-stress element 421 and the first magnetic element 360, and the first spacer and the bearing block M3 have an integrally formed structure. In some embodiments, the first pre-pressure element 421 can be exposed on the surface of the fixing portion F, and when the movable portion is located at the first position, the bearing seat M3 and the first pre-pressure element 421 can be in direct contact.

In addition, the bearing seat M3 can expose the first magnetic element 360 at least partially from the first pre-pressure element 421, so that the first acting force generated by the first pre-pressure element 421 and the first magnetic element 360 can position the movable portion at the first position more stably. When the movable portion is located at the first position, a first distance is formed between the first pre-pressure element 421 and the first magnetic element 360. When the movable portion is in the first position, there is a second distance between the first pre-stressing element 421 and the first coil 360. In some embodiments, the first distance may be greater than or equal to the second distance. It will be understood that the first and second distances described above are the shortest distances between the two elements, respectively.

As shown in fig. 8, when the movable portion is located at the first position relative to the fixed portion F, the second pre-pressure element 422 and the first magnetic element 360 generate a second acting force (e.g., a magnetic force) to position the movable portion at the second position relative to the fixed portion F when the first driving component E3 is not activated, so as to prevent the optical element driving mechanism 20 from operating abnormally.

The second pre-stressing element 422 is fixedly connected to the first coil 350. In some embodiments, the second pre-stress element 422 is fixedly connected to the first magnetic permeable element 340 and is in direct contact with the first magnetic permeable element 340. In some embodiments, the second pre-stress element 422 and the first magnetically permeable element 340 are integrally formed. In some embodiments, the second pre-stress element 422 has an elongated structure extending along a second direction (e.g., Z-axis), wherein the second direction is different from the first direction (e.g., X-axis) along which the first magnetic permeable element 340 extends. In some embodiments, the first direction is perpendicular to the second direction. As shown in fig. 8, the second pre-stressing element 422 is not lower than the first coil 350 in the second direction. In some embodiments, the second pre-stressing element 422 is higher than the first coil 350 in the second direction. In other words, the second pre-stressing element 422 exceeds the contour of the first coil 350, viewed in the first direction.

In some embodiments, the center of the second pre-stress element 422 and the center of the first magnetic element 360 do not lie on the same horizontal plane (e.g., the X-Y plane). In other words, a line connecting the center of the second pre-stress element 422 and the center of the first magnetic element 360 is not parallel to the first direction or the second direction and is not perpendicular to the first direction or the second direction. In this way, the direction of the second acting force generated by the second pre-stress element 422 and the first magnetic element 360 (which is substantially parallel to the connection line between the center of the second pre-stress element 422 and the center of the first magnetic element 360) is not parallel to the first direction or the second direction, and is not perpendicular to the first direction or the second direction. In some embodiments, the direction of the first force is different from the direction of the second force. In some embodiments, the direction of the first force is not parallel and perpendicular to the direction of the second force.

When the movable portion is in the second position, there may be a second spacer located between second pre-stressing element 422 and first magnetic element 360, so that second pre-stressing element 422 is not in direct contact with first magnetic element 360. In some embodiments, the carrier M3 is at least partially located between the second pre-stressing element 422 and the first magnetic element 360, and the second spacer is of integral construction with the carrier M3. In some embodiments, the second pre-pressure element 422 may be exposed on the surface of the fixing portion F, and when the movable portion is located at the second position, the bearing seat M3 and the second pre-pressure element 422 may be in direct contact.

In addition, the bearing seat M3 can expose the first magnetic element 360 at least partially to the second pre-stressing element 422, so that the second acting force generated by the second pre-stressing element 422 and the first magnetic element 360 can position the movable portion at the second position more stably. When the movable portion is located at the second position, the second pre-stressing element 422 and the first magnetic element 360 have a third distance therebetween. When the movable part is in the second position, the second pre-stressing element 422 has a fourth distance to the first coil 360. In some embodiments, the third distance may be greater than or equal to the fourth distance. It should be understood that the third distance and the fourth distance are the shortest distances between the two elements, respectively.

In addition, when the movable portion is located at the first position relative to the fixed portion F, the positioning member M4 is not in direct contact with the optical element R. Because of the gap between the positioning assembly M4 and the optical element R, it is advantageous to move the positioning assembly M4 relative to the optical element R. In some embodiments, the first pre-stressing element 421 is located between the first drive assembly E3 and the second drive assembly E4, as viewed along the second direction (e.g., the Z-axis). In some embodiments, the first drive assembly E3 and the second drive assembly E4 at least partially overlap when viewed along a first direction (e.g., the X-axis). In some embodiments, the second driving assembly E4 at least partially overlaps the first pre-stressing element 421, the second pre-stressing element 422, and the fixing portion F is located between the pre-stressing assembly 420 and the second driving assembly E4, as viewed in the first direction. With the above arrangement, the optical element driving mechanism 20 can be miniaturized, or electromagnetic interference between the pre-press unit 420 and the second driving unit E4 can be avoided.

Fig. 9 illustrates a bottom view of the optical element drive mechanism 20 according to some embodiments of the present disclosure. As shown in fig. 9, the fixing portion F (including the body 310 and the bottom cover 410) at least partially exposes the first coil 350 disposed on the first magnetically permeable member 340 when viewed from a direction (e.g., Z axis) perpendicular to the first direction. More specifically, the first opening 315 of the body 310 may be used to accommodate the first coil 350. In some embodiments, an adhesive (not shown) is disposed between the fixing portion F and the first coil 350 (e.g., in the first opening 315) to fix and protect the first coil 350. In some embodiments, the first coil 350 is located between the first magnetic element 360 and the adhesive.

In summary, the embodiments of the present disclosure provide an optical element driving mechanism provided with a pre-press assembly. By the acting force (such as a magnetic force) generated by the pre-pressure component and the magnetic element, the movable part can be positioned at a specific position relative to the fixed part when the first driving component E3 is not actuated, thereby preventing the optical element driving mechanism from abnormal operation and being beneficial to reducing the probability of the optical element driving mechanism failure. Further, by at least partially overlapping the driving unit and the preliminary press unit, the optical element driving mechanism 20 can be miniaturized. A fixing part is arranged between the pre-pressure assembly and the driving assembly, so that electromagnetic interference between the pre-pressure assembly and the driving assembly can be avoided.

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

Claims

1. An optical element driving mechanism, comprising

A movable part including an optical element;

a fixed part, the movable part can move relative to the fixed part;

a first driving assembly for driving the movable portion to move relative to the fixed portion, the first driving assembly comprising:

a first coil;

a first magnetic element for generating magnetic force and corresponding to the first coil; and

a first magnetic conductive element having magnetic conductive material and corresponding to the first coil, wherein:

the first coil is arranged on the first magnetic conduction element;

the first coil is wound on the first magnetic conduction element, and the first magnetic conduction element is provided with a strip structure extending along a first direction;

the fixed part at least partially exposes the first coil when viewed from a direction perpendicular to the first direction; and

a pre-pressure component for positioning the movable part at a first position relative to the fixed part when the first driving component is not actuated.

2. The optical element driving mechanism according to claim 1,

an adhesive is arranged between the fixed part and the first coil;

the first coil is positioned between the first magnetic element and the adhesive;

the fixing part is provided with an opening for accommodating the first coil; and

the adhesive is disposed in the opening.

3. The optical element driving mechanism as claimed in claim 1, wherein the pre-press assembly further comprises a first pre-press element having magnetic permeability and corresponding to the first magnetic element, wherein:

when the movable part is located at the first position relative to the fixed part, the first pre-pressure element and the first magnetic element generate a first acting force, so that the movable part is located at the first position relative to the fixed part when the first driving component is not actuated;

the first pre-stressing element is fixedly connected with the first coil;

the first pre-pressure element is fixedly connected with the first magnetic conduction element;

the first pre-pressure element is directly contacted with the first magnetic conduction element;

the first pre-pressing element is provided with a strip-shaped structure extending along a second direction;

the first direction is different from the second direction;

the direction of the first acting force is not parallel to the first direction or the second direction;

the direction of the first acting force is not perpendicular to the first direction or the second direction;

a connecting line between the center of the first pre-stress element and the center of the first magnetic element is not parallel to the first direction or the second direction; and

the connection line is not perpendicular to the first direction or the second direction.

4. The optical element driving mechanism according to claim 3,

the first direction is perpendicular to the second direction;

the first pre-pressure element is not lower than the first coil in the second direction;

the first pre-stressing element exceeds the contour of the first coil, viewed in the first direction;

when the movable part is located at the first position, a first distance is reserved between the first pre-pressure element and the first magnetic element;

when the movable part is located at the first position, a second distance is reserved between the first pre-pressing element and the first coil;

the first distance is greater than or equal to the second distance;

the fixed part also comprises a first spacing piece, and when the movable part is positioned at the first position, the first spacing piece is positioned between the first pre-pressure element and the first magnetic element; and

when the movable part is located at the first position, the first pre-pressure element is not in direct contact with the first magnetic element.

5. The optical element driving mechanism according to claim 4,

the first pre-pressure element is higher than the first coil in the second direction;

the movable portion further includes:

a bearing seat configured to bear the first magnetic element;

the bearing seat is connected to the optical element;

the bearing seat is at least partially positioned between the first pre-pressure element and the first magnetic element;

the bearing seat at least partially exposes the first magnetic element to the first pre-pressure element;

when the movable part is located at the first position, the bearing seat is directly contacted with the first pre-pressure element; and

the first spacing piece and the bearing seat are of an integrated structure.

6. The optical element driving mechanism according to claim 3,

the pre-pressure component is connected to the first magnetic conductive element;

the pre-pressure component is in direct contact with the first magnetic conduction element; and

the pre-pressure component and the first magnetic conduction element are integrally formed.

7. An optical element driving mechanism according to claim 3, wherein the pre-press assembly is configured to position the movable portion at a second position relative to the fixed portion when the first driving assembly is not actuated, and further comprising:

a second pre-pressure element having magnetic conductivity material and corresponding to the first magnetic element, wherein:

when the movable part is located at the second position relative to the fixed part, the second pre-pressure element and the first magnetic element generate a second acting force, so that the movable part is located at the second position relative to the fixed part when the first driving component is not actuated;

the second pre-stressing element is fixedly connected with the first coil;

the second pre-pressure element is fixedly connected with the first magnetic conduction element;

the second pre-pressure element is directly contacted with the first magnetic conduction element;

the second pre-pressing element is provided with an elongated structure and extends along the second direction;

the direction of the second acting force is not parallel to the first direction or the second direction;

the direction of the second acting force is not perpendicular to the first direction or the second direction;

the direction of the first acting force is different from the direction of the second acting force;

a connecting line between the center of the second pre-stress element and the center of the first magnetic element is not parallel to the first direction or the second direction; and

the connecting line between the center of the second pre-stress element and the center of the first magnetic element is not perpendicular to the first direction or the second direction.

8. The optical element driving mechanism according to claim 7,

the direction of the first acting force is not parallel to the direction of the second acting force;

the direction of the first acting force is not perpendicular to the direction of the second acting force;

the second pre-pressure element is not lower than the first coil in the second direction;

the second pre-stressing element exceeds the contour of the first coil, viewed in the first direction;

when the movable part is located at the second position, a third distance is reserved between the second pre-pressure element and the first magnetic element;

when the movable part is located at the second position, a fourth distance is reserved between the first pre-pressure element and the first coil;

the third distance is greater than or equal to the fourth distance;

the fixed part also comprises a second spacing piece which is positioned between the second prepressing element and the first magnetic element when the movable part is positioned at the second position; and

when the movable part is located at the second position, the second pre-pressure element is not in direct contact with the first magnetic element.

9. An optical element driving mechanism according to claim 3, further comprising:

a positioning component for positioning the movable part at the first position relative to the fixed part when the first driving component is not actuated; and

a second driving assembly for driving the positioning assembly to move relative to the fixing portion, the second driving assembly comprising:

a second coil;

a second magnetic element for generating magnetic force and corresponding to the second coil; and

a second magnetic conductive element having magnetic conductive material and corresponding to the second coil, wherein:

when the movable part is located at the first position relative to the fixed part, the positioning component is not directly contacted with the optical element;

the first driving component is used for driving the movable part to move along the first direction;

when viewed along the second direction, the first pre-pressure element is positioned between the first driving assembly and the second driving assembly;

when viewed along the first direction, the first driving assembly and the second driving assembly are at least partially overlapped;

the second drive assembly at least partially overlaps the first pre-stressing element when viewed in the first direction; and

the fixing part is positioned between the pre-pressure component and the second driving component.