Optical element driving mechanism

Abstract

The invention provides an optical element driving mechanism. The optical element driving mechanism comprises a movable part, a fixed part and a driving assembly. The movable part is used for connecting an optical element. The movable part can move relative to the fixed part. The driving assembly is used for driving the movable part to move.

Description

Technical Field

[0001] The present invention relates to an optical element driving mechanism, and in particular to an optical element driving mechanism having a movable part and a plurality of connecting elements. Background Art

[0002] With the development of technology, many electronic devices (such as computers or tablets) now have the function of taking photos or recording videos. The use of these electronic devices is becoming more and more common. In addition to developing more stable and better optical quality, they are also moving towards convenient and lightweight designs to provide users with more choices.

[0003] However, when an optical element with a long focal length (such as a lens) is required to be disposed in the aforementioned electronic device, the thickness of the electronic device will increase, which is not conducive to the thinness and stability of the electronic device. In view of this, how to design an optical system that can make the electronic device thinner and more stable has become an important issue. Summary of the invention

[0004] The terms of embodiment and similar terms (e.g., implementation, configuration, features, examples, and options) are intended to broadly refer to all of the subject matter of the present invention and the following claims. Several statements containing these terms should be understood as not limiting the subject matter described herein or limiting the meaning or scope of the following claims. The embodiments of the present invention covered herein are defined by the following claims, rather than this content. This content is a high-level overview of the various features of the present invention and introduces some of the concepts described in more detail in the following implementation paragraphs. This content is not intended to identify the key or essential features of the subject matter of the claims, nor is it intended to be used independently to determine the scope of the subject matter of the claims. This subject matter should be understood by reference to appropriate portions of the complete specification of the present invention, any or all drawings, and each claim.

[0005] An object of the present invention is to provide an optical element driving mechanism to solve at least one of the above problems.

[0006] According to certain features of the present disclosure, an optical element driving mechanism is provided. The optical element driving mechanism includes a movable part, a fixed part and a driving assembly. The movable part is used to connect an optical element. The movable part can move relative to the fixed part. The driving assembly is used to drive the movable part to move.

[0007] According to certain features of the present disclosure, the optical element driving mechanism further includes an aperture assembly having a plurality of blades. The plurality of blades form an opening, and an incident light enters the optical element through the opening. The fixing portion includes an outer cover and a buffer element. The outer cover at least partially covers the aperture assembly and the optical element. The buffer element is disposed between the outer cover and the aperture assembly.

[0008] The above summary of the invention is not intended to present every embodiment or every feature of the present invention. Rather, the foregoing summary of the invention merely provides examples of some of the novel features and characteristics set forth herein. The above features and advantages and other features and advantages of the present invention will become apparent from the following detailed description of representative embodiments and modes for carrying out the present invention when taken in conjunction with the accompanying drawings and the appended claims. Additional features of the present invention will be apparent to those skilled in the art in view of the detailed description of various embodiments provided below with reference to the accompanying drawings, symbolically briefly illustrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The present invention and its advantages will be better understood from the following description of exemplary embodiments in conjunction with reference to the accompanying drawings, which illustrate exemplary embodiments only and therefore should not be considered as limiting the various embodiments or the claims.

[0010] Figure 1 FIG. 1 is a perspective view of an optical element driving mechanism according to certain features of the present disclosure.

[0011] Figure 2 According to certain features of the present disclosure, the optical element driving mechanism and the optical element along Figure 1 Section view of line AA.

[0012] Figure 3 A perspective view of an optical element driving mechanism and an optical element according to certain features of the present disclosure, with the outer cover and the buffer element removed for illustrative purposes.

[0013] Figure 4 An exploded perspective view of an optical element drive mechanism and an optical element according to certain features of the present disclosure, with the outer cover and the buffer element removed for illustrative purposes.

[0014] Figure 5 According to certain features of the present disclosure, the optical element driving mechanism and the optical element along Figure 1 In the cross-sectional view along line BB of , for illustrative purposes, the outer cover and the cushioning element are removed, and the first portion of the base is shown with oblique lines.

[0015] Figure 6 A top view of an optical element drive mechanism and an optical element, wherein blades of an aperture assembly are in a first position, with an outer cover, an inner cover, and a buffer element removed for illustrative purposes, according to certain features of the present disclosure.

[0016] Figure 7 A top view of an optical element drive mechanism and an optical element with a blade in a second position according to certain features of the present disclosure, with the outer cover, inner cover, and buffer element removed for illustrative purposes.

[0017] Figure 8 A top view of an optical element drive mechanism and an optical element with a blade in a third position according to certain features of the present disclosure, with the outer cover, inner cover, and buffer element removed for illustrative purposes.

[0018] Fig. 9 A top view of an optical element drive mechanism and an optical element with a blade in a fourth position according to certain features of the present disclosure, with the outer cover, inner cover, and buffer element removed for illustrative purposes.

[0019] The reference numerals are as follows:

[0020] 1: Optical element drive mechanism

[0021] 10: Optical components

[0022] 100: Activities Department

[0023] 110: Stabilizing element

[0024] 100-b: convex column

[0025] 200:Fixed part

[0026] 210: Outer cover

[0027] 220: Buffer element

[0028] 230:Frame

[0029] 230-a: convex column

[0030] 240: Base

[0031] 241: Part 1

[0032] 242: Part 2

[0033] 243, 244, 245, 246, 247: Connecting elements

[0034] 250: Frame

[0035] 260: Shading element

[0036] 270: Inner cover

[0037] 300: Drive components

[0038] 310: Magnetic components

[0039] 311: First surface

[0040] 312: Second surface

[0041] 320: Coil

[0042] 400: Aperture assembly

[0043] 410: Blade

[0044] 410-a: hole

[0045] 410-b: Long hole

[0046] 470: Opening

[0047] 500: Circuit components

[0048] 511, 512, 513, 514: external components

[0049] 511-E, 512-E, 513-E, 514-E: electrical connection part

[0050] 521, 522, 523, 524, 525, 526: elastic element

[0051] 600: Boot component

[0052] 611, 612, 613, 614: guiding elements

[0053] P1: Protruding structure

[0054] S1: First side

[0055] T1: Thickness

[0056] T2: Thickness

[0057] O: Optical axis DETAILED DESCRIPTION

[0058] Various embodiments are described with reference to the accompanying drawings, and similar reference symbols are used to designate similar or equivalent elements throughout the accompanying drawings. The accompanying drawings are not drawn to scale, and the accompanying drawings are provided only to show the characteristics and features of the present disclosure. It should be understood that many specific details, relationships and methods are set forth to provide a comprehensive understanding. However, it will be easily appreciated by those skilled in the art that various embodiments can be practiced without one or more specific details or in other methods. In some cases, for illustrative purposes, known structures or operations are not shown in detail. Various embodiments are not limited to the order in which actions or events are displayed, as some actions can occur in different orders and / or simultaneously with other actions or events. In addition, not all of the actions or events shown are required for implementing certain features and characteristics of the present disclosure.

[0059] For purposes of this embodiment, the singular includes the plural and vice versa unless expressly stated otherwise. The term "including" means "including, but not limited to." In addition, approximate words such as "about," "almost," "substantially," and "approximately," and the like, may mean, for example, "at," "near," "nearly at," "within 3-5% of," "within acceptable manufacturing tolerances," or any logical combination thereof. Additionally, the terms "vertical" or "horizontal" are intended to further include "within 3-5%" of the vertical or horizontal direction, respectively. In addition, directional words such as "top," "bottom," "left," "right," "above," and "below" are intended to be relative to equivalent directions depicted in reference illustrations; to be understood from the context of the referenced object or element, such as from a common position of the object or element; or other descriptions thereof.

[0060] It is understood that although the terms "first", "second", etc. may be used herein to describe various elements, layers and / or parts, these elements, layers and / or parts should not be limited by these terms, and these terms are only used to distinguish different elements, layers and / or parts. Therefore, a first element, layer and / or part discussed below may be referred to as a second element, layer and / or part without departing from the teachings of some embodiments of the present disclosure. In addition, for the sake of brevity, the terms "first", "second", etc. may not be used in the specification to distinguish different elements. Without violating the scope defined by the attached claims, the first element and / or second element recorded in the claims may be interpreted as any element that conforms to the description in the specification.

[0061] It should be noted that the technical solutions provided in the following different embodiments can be replaced, combined or mixed with each other to form another embodiment without violating the spirit of the present disclosure.

[0062] The present disclosure relates to an optical element driving mechanism, which has a driving component and a guiding component, driving a movable part and an optical element to move, thereby adjusting the photographic imaging of the optical element driving mechanism to meet different photographic requirements.

[0063] First please see Figures 1 to 4 , Figure 1 1 is a three-dimensional diagram of an optical element driving mechanism 1 and an optical element 10 according to certain features of the present disclosure. Figure 2 According to certain features of the present disclosure, the optical element driving mechanism 1 and the optical element 10 are arranged along Figure 1 A cross-sectional view of line AA. Figure 3According to certain features of the present disclosure, the optical element driving mechanism 1 and the optical element 10 are shown in a perspective view with the outer cover 210 and the buffer element 220 removed for illustrative purposes. Figure 4 The exploded perspective view of the optical element driving mechanism 1 and the optical element 10 according to certain features of the present disclosure is shown, with the outer cover 210 and the buffer element 220 removed for illustrative purposes.

[0064] The optical element driving mechanism 1 includes a movable part 100, a fixed part 200, a driving assembly 300, an aperture assembly 400, a circuit assembly 500 and a guide assembly 600. The movable part 100 is connected to the optical element 10, and the optical element 10 can be, for example, an optical lens. The movable part 100 can move relative to the fixed part 200. The driving assembly 300 drives the movable part 100 to move. The optical element 10 is arranged on a lens driving device (not shown), and the functions of auto focus (AF) and optical image stabilization (OIS) are achieved through the lens driving device, and the lens driving device has a plurality of driving circuit parts (not shown) for driving the lens driving device.

[0065] The movable part 100 includes a stabilizing element 110. The stabilizing element 110 is fixedly disposed on the side of the movable part 100 opposite to a magnetic element 310 of the driving assembly 300. The stabilizing element 110 can be a magnetic element with a different size from the magnetic element 310, which provides additional magnetic attraction for the movable part 100 to stabilize the structure.

[0066] The fixing portion 200 includes an outer cover 210 , a buffer element 220 , a frame 230 , a base 240 , an outer frame 250 , a light shielding element 260 and an inner cover 270 .

[0067] The outer cover 210 at least partially covers the aperture assembly 400 and the optical element 10. The buffer element 220 is disposed between the outer cover 210 and the aperture assembly 400. The outer cover 210 and the buffer element 220 can protect the elements in the optical element driving mechanism 1 from being easily affected by external impact.

[0068] Please also see Figure 5 . Figure 5 According to certain features of the present disclosure, the optical element driving mechanism 1 is arranged along Figure 1 In the cross-sectional view along line BB of FIG. 25 , for illustrative purposes, the outer cover 210 and the buffer element 220 are removed, and the first portion 241 of the base 240 is shown in oblique lines. The frame 230 is fixedly connected to the base 240. The base 240 has a protruding structure P1. The protruding structure P1 protrudes toward a first side S1 of the outer frame 250.

[0069] The base 240 includes a first portion 241, a second portion 242, and a plurality of connecting elements 243, 244, 245, 246, 247. The second portion 242 is fixedly connected to the first portion 241. A thickness T2 of the second portion 242 is greater than a thickness T1 of the first portion 241, and the hardness of the second portion 242 is greater than the hardness of the first portion 241. The plurality of connecting elements 243, 244, 245, 246, 247 are embedded in the second portion 242.

[0070] The light shielding element 260 can be made of a light absorbing material, such as SOMA. The inner cover 270 is movably disposed on the aperture assembly 400. The aperture assembly 400 is located between the light shielding element 260 and the inner cover 270.

[0071] Please continue to refer to Figure 4 The driving assembly 300 includes a magnetic element 310 and a coil 320. The magnetic element 310 is disposed on the movable portion 100. The coil 320 is disposed on the protruding structure P1 of the base 240, adjacent to the first side S1.

[0072] The magnetic element 310 moves relative to the coil 320 through the electromagnetic driving force generated between the magnetic element 310 and the coil 320. As a result, the movable part 100 moves relative to the base 240, and the movable part 100 drives the aperture assembly 400 to move. Therefore, the electromagnetic driving force generated between the magnetic element 310 and the coil 320 can drive the movable part 100 to drive the aperture assembly 400 to move relative to the base 240.

[0073] The aperture assembly 400 has a plurality of blades 410. In this embodiment, there are six blades 410. The six blades 410 form an opening 470, and an incident light enters the optical element 10 through the opening 470.

[0074] The circuit assembly 500 includes a plurality of external components 511, 512, 513, 514 and a plurality of elastic components 521, 522, 523, 524, 525, 526. The elastic components 521, 522, 523, 524, 525, 526 are flexible. The external components 511, 512, 513, 514 are electrically connected to the elastic components 521, 522, 523, 524, 525, 526. The elastic components 521, 522, 523, 524, 525, 526 are electrically connected to the coil 320 via the connecting components 243, 244, 245, 246, 247.

[0075] The external components 511, 512, 513, 514 include a plurality of electrical connection portions 511-E, 512-E, 513-E, 514-E extending along the incident light direction, that is, the electrical connection portions extend along the optical axis O. Specifically, the distance between the plurality of electrical connection portions 511-E, 512-E, 513-E, 514-E and the optical axis O is greater than the distance between the outer frame 250 and the optical axis O, and when viewed along the incident light direction, the electrical connection portions 511-E, 512-E, 513-E, 514-E of the circuit assembly 500 at least partially overlap with the outer frame 250 (see FIG. Figure 1 ), thereby facilitating the optical element driving mechanism 1 to be disposed on the lens driving device. Specifically, in the present embodiment, the lens driving device equipped with the optical element 10 does not need to additionally design a circuit for driving the movable portion 100 and the aperture assembly 400 to complicate the structural design of the lens driving device. At the same time, in conjunction with the electrical connection portions 511-E, 512-E, 513-E, 514-E of the circuit assembly 500 of the optical element driving mechanism 1 located on the first side S1, the driving circuit portion of the lens driving device can also be arranged on the first side S1. When the electrical connection portions 511-E, 512-E, 513-E, 514-E and the driving circuit portion are all located on the same side, the circuit design for controlling the optical element driving mechanism 1 and the lens driving device can be made more convenient and simple.

[0076] The base 240 is connected to the outer frame 250 via the elastic elements 521, 522, 523, 524, 525, 526. Due to the flexibility of the elastic elements 521, 522, 523, 524, 525, 526, the base 240 can move relative to the outer frame 250. The outer elements 511, 512, 513, 514 are located at the first side S1 of the outer frame 250.

[0077] The guide assembly 600 includes a plurality of guide elements. In the present embodiment, there are four guide elements 611, 612, 613, 614, which are disposed between the movable part 100 and the frame 230, adjacent to the first side S1. The movable part 100 is connected to the frame 230 via the four guide elements 611, 612, 613, 614. The guide elements 611, 612, 613, 614 movably connect the frame 230 and the movable part 100. When the movable part 100 is driven by the driving assembly 300 to move, the guide elements 611, 612, 613, 614 roll between the frame 230 and the movable part 100, so that the movable part 100 moves smoothly relative to the frame 230.

[0078] The magnetic element 310 includes a first surface 311 and a second surface 312. The first surface 311 and the second surface 312 face opposite directions. The first surface 311 faces the optical axis O, and the second surface 312 faces the coil 320. The distance d2 between the guiding elements 611, 612, 613, 614 and an optical axis O of the incident light is greater than the distance d1 between the magnetic element 310 and the optical axis O (see Figure 5 ), and the distance d2 between the guiding elements 611, 612, 613, 614 and the optical axis O of the incident light is greater than the distance between the second surface 312 of the magnetic element 310 and the optical axis O. The first surface 311 and the second surface 312 are both curved surfaces, and the curvature radius of the first surface 311 is different from the curvature radius of the second surface 312, and the curvature radius of the first surface 311 is smaller than the curvature radius of the second surface 312. With this structural design, when the electromagnetic driving force causes the magnetic element 310 to move relative to the coil 320, the electromagnetic driving force can be made more stable, thereby making the movement of the movable part 100 and the aperture assembly 400 more stable.

[0079] The following is relative to Figures 6 to 9 The movement of the movable portion 100 relative to the frame 230 is described. Figure 6 A top view of the optical element driving mechanism 1 and the optical element 10 according to certain features of the present disclosure, wherein the blade 410 is located in a first position, and for illustrative purposes, the outer cover 210, the inner cover 270 and the buffer element 220 are removed. Figure 7 A top view of the optical element driving mechanism 1 and the optical element 10 according to certain features of the present disclosure, wherein the blade 410 is located at a second position, and for illustrative purposes, the outer cover 210, the inner cover 270 and the buffer element 220 are removed. Figure 8 A top view of the optical element driving mechanism 1 and the optical element 10 according to certain features of the present disclosure, wherein the blade 410 is located at a third position, and for illustrative purposes, the outer cover 210, the inner cover 270 and the buffer element 220 are removed. Fig. 9 A top view of the optical element driving mechanism 1 and the optical element 10 according to certain features of the present disclosure, wherein the blade 410 is located at a fourth position, and for illustrative purposes, the outer cover 210, the inner cover 270 and the buffer element 220 are removed.

[0080] The movable part 100 is connected to the six blades 410. Each of the six blades 410 has a hole 410-a and a slot 410-b for connecting the movable part 100 and the frame 230, as will be further explained below.

[0081] The movable part 100 and the blade 410 can move relative to the frame 230. The movable part 100 has a plurality of protrusions 100-b, which penetrate into the long hole 410-b of the blade 410 and can move in the long hole 410-b.

[0082] The frame 230 has a plurality of bosses 230-a, which penetrate into the hole 410-a of the blade 410 and can rotate in the hole 410-a. The blade 410 is connected to the movable part 100 and the frame 230 via the bosses 100-b and the bosses 230-a and the long holes 410-b and the holes 410-a.

[0083] When the movable part 100 is driven by the driving assembly 300 to move, the plurality of protrusions 100-b of the movable part 100 penetrate into the long hole 410-b of the blade 410 and move in the long hole 410-b, and the plurality of protrusions 230-a of the frame 230 penetrate into the hole 410-a of the blade 410 and rotate in the hole 410-a, thereby driving the movement of the blade 410. By moving the blade 410, the size of the opening 470 formed by the blade 410 can be adjusted.

[0084] exist Figure 6 In the first position shown, the opening 470 formed by the blades 410 is larger, so that a larger amount of incident light can pass through the opening 470 to reach the optical element 10 in this position.

[0085] exist Figure 7 In the second position shown, the opening 470 formed by the blades 410 is relatively large. Figure 6 The first position shown is small, so the second position can cause the amount of incident light reaching the optical element 10 through the opening 470 to be less than the first position.

[0086] exist Figure 8 In the third position shown, the opening 470 formed by the blades 410 is relatively Figure 7 The second position shown is small, so that in the third position the amount of incident light reaching the optical element 10 through the opening 470 is less than that in the second position.

[0087] exist Fig. 9 In the fourth position shown, the opening 470 formed by the blades 410 is relatively Figure 6 The first position shown, Figure 7 The second position shown and Figure 8 The third positions shown are all small, so that the amount of incident light reaching the optical element 10 through the opening 470 in the fourth position can be less than that in the first position, the second position and the third position.

[0088] In summary, the present invention provides an optical element driving mechanism, which includes a movable part, a fixed part, a driving assembly, an aperture assembly and a guide assembly. The movement of the driving assembly drives the movable part to move relative to the fixed part. As a result, the position of the blades can be adjusted, and the amount of incident light reaching the optical element can be adjusted to meet different photography needs and provide more stable optical quality. At the same time, through the design of the outer frame and the circuit assembly, the optical element driving mechanism can be more easily set on the lens driving device, so that the structural design of the movable part and the aperture assembly of the optical element driving mechanism will not be affected by the lens driving device, but can be used with lens driving devices of different sizes, and the circuit design of driving the movable part and the aperture assembly to move can be independent of the circuit design of the lens driving device, thereby simplifying the design of the control circuit.

[0089] Although embodiments of the present invention have been shown and described with respect to one or more implementations, equivalents and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. In addition, although a particular feature of the present invention may have been invented with respect to only one of several implementations, for any given or particular application, such feature may be combined with one or more other features of other implementations as may be required and advantageous.

[0090] Although various embodiments of the present invention have been described above, it should be understood that they are presented in an exemplary and non-limiting manner only. Various changes can be made according to the embodiments invented herein without departing from the spirit or scope of the present invention. Therefore, the breadth and scope of the present invention should not be limited by any of the above-described embodiments. On the contrary, the scope of the present invention should be defined according to the following claims and their equivalents.

[0091] The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. In addition, the terms "including, includes," "having, has, with," or variations thereof used in the embodiments and / or claims are intended to be included in a manner similar to the word "comprising."

Claims

1. An optical element driving mechanism, comprising: A movable portion, used to connect an optical element; a fixed portion, the movable portion being movable relative to the fixed portion; as well as A driving assembly is used to drive the movable part to move.

2. The optical element driving mechanism according to claim 1, further comprising: an aperture assembly having a plurality of blades, wherein the plurality of blades form an opening, and an incident light enters the optical element through the opening; The fixing part includes: an outer cover, at least partially covering the aperture assembly and the optical element; as well as A buffer element is arranged between the outer cover and the aperture assembly.

3. The optical element driving mechanism according to claim 2, further comprising: A circuit assembly comprising: A plurality of external components; and A plurality of elastic elements, a plurality of the external elements are electrically connected to the plurality of the elastic elements, and A plurality of the elastic elements are electrically connected to the driving assembly.

4. The optical element driving mechanism as claimed in claim 3, wherein the fixing portion further comprises: A framework; A base; as well as An outer frame, wherein The frame is fixedly connected to the base, and the base is connected to the outer frame via a plurality of elastic elements; and The plurality of external components are located on a first side of the outer frame.

5. The optical element driving mechanism as claimed in claim 4, wherein the driving assembly comprises: a magnetic element, disposed on the movable portion; as well as A coil is disposed on a protruding structure of the base, adjacent to the first side, wherein the protruding structure protrudes toward the first side. 6 . The optical element driving mechanism as claimed in claim 5 , wherein the movable portion comprises a stabilizing element, and the stabilizing element is fixedly disposed on an opposite side of the magnetic element.

7. The optical element driving mechanism as claimed in claim 5, further comprising a guide assembly, wherein: The guide assembly includes a plurality of guide elements disposed between the movable portion and the frame, adjacent to the first side; The movable part is connected to the frame via a plurality of the guide elements. 8 . The optical element driving mechanism as claimed in claim 7 , wherein the distance between the plurality of guiding elements and an optical axis of the incident light is greater than the distance between the magnetic element and the optical axis.

9. The optical element driving mechanism as claimed in claim 5, wherein the base comprises:

1. Part I; as well as a second part fixedly connected to the first part, wherein A thickness of the second portion is greater than a thickness of the first portion, and a hardness of the second portion is greater than a hardness of the first portion. 10 . The optical element driving mechanism as claimed in claim 5 , wherein the base further comprises a plurality of connecting elements, and the plurality of elastic elements are electrically connected to the coil via the plurality of connecting elements.

11. An optical element driving mechanism as described in claim 4, wherein the external element further includes a plurality of electrical connection portions extending along the direction of the incident light, the distance between the plurality of electrical connection portions and an optical axis of the incident light is greater than the distance between the outer frame and the optical axis, and when observed along the direction of the incident light, the plurality of electrical connection portions at least partially overlap with the outer frame.

12. An optical element driving mechanism as described in claim 5, wherein the magnetic element includes a first surface and a second surface, the first surface and the second surface face in opposite directions, the second surface faces the coil, the first surface and the second surface are both curved surfaces, and the radius of curvature of the first surface is different from the radius of curvature of the second surface, and the radius of curvature of the first surface is smaller than the radius of curvature of the second surface.

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