CN111929797B - Lens driving device - Google Patents
Lens driving device Download PDFInfo
- Publication number
- CN111929797B CN111929797B CN202011020387.9A CN202011020387A CN111929797B CN 111929797 B CN111929797 B CN 111929797B CN 202011020387 A CN202011020387 A CN 202011020387A CN 111929797 B CN111929797 B CN 111929797B
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- Prior art keywords
- groove
- movable body
- axis
- ring portion
- lens driving
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
- Lens Barrels (AREA)
Abstract
The invention relates to a lens driving device, which comprises a protective cover, a fixed body, a movable body, a swinging support mechanism, a printed circuit board and a driving mechanism, wherein the fixed body is accommodated and fixedly arranged in the protective cover, the movable body is used for loading a lens and is accommodated in the fixed body and can swing, the swinging support mechanism is accommodated in the protective cover and is used for elastically supporting the movable body, the printed circuit board is accommodated in the protective cover and is fixedly arranged on the outer peripheral side of the fixed body, and the driving mechanism is fixedly arranged on the inner side surface of the printed circuit board and is electrically connected with the printed circuit board. The invention has the beneficial effects that: the assembly process is simple, the precision requirement of parts is low, and the cost is low; the printed circuit board occupies less space; the elastic piece can stabilize the movement of the whole system; the hand-shake prevention effect of +/-3 degrees in the two directions of the first axis and the second axis can be realized.
Description
Technical Field
The invention relates to the technical field of driving devices, in particular to a lens driving device.
Background
With the rapid development of the photographing technology, the lens driving apparatus is widely used in a plurality of photographing apparatuses. The lens driving apparatus is applied to various portable electronic devices such as mobile phones, tablet computers, and the like, and is particularly accepted by consumers.
A driving mechanism of a lens driving device applied to a general portable electronic apparatus is generally formed of a coil fixed to an outer periphery of a camera lens frame and a permanent magnet. When a current is applied to the coil, the coil moves the lens frame and moves the lens frame in the optical axis direction of the lens by the action of the electromagnetic force, thereby enabling focusing. However, when a user holds the electronic device with a hand to photograph, it is impossible to avoid the camera shake of the lens driving device due to the camera shake. Therefore, the lens may be continuously moved in a direction orthogonal to the optical axis of the lens. In this way, in the lens driving device, it is inevitable that the quality of the captured image is degraded due to the influence of the camera shake.
In order to solve the technical problem, in the prior art, adopt metal double ball suspension structure, the ball setting in four corners is in the recess, provides the rotational degree of freedom that is the two axis lines of diagonal setting, and this kind of structure can reduce the influence that the hand shake caused, however, the equipment processing procedure is complicated, needs the welding steel ball, and part required precision is high, and is with high costs, and is bulky, and adopts double-deck FPC, occupation space is many, in addition, ball friction contact system is unstable, is difficult to control.
Disclosure of Invention
An object of the present invention is to provide a lens driving apparatus which can solve the technical problems involved in the background art.
In order to solve the above technical problem, the present invention provides a lens driving device including:
a fixed body;
a movable body for loading the lens and being swingable;
a swing support mechanism for supporting the movable body to be capable of swinging about a first axis intersecting an optical axis and swinging about a second axis intersecting the optical axis and the first axis;
a driving mechanism for driving the movable body to swing around the first axis and around the second axis;
wherein, the swing support mechanism includes:
one end of the elastic piece is fixedly arranged on the fixed body, and the other end of the elastic piece is fixedly connected with the movable body;
a spacer located between the fixed body and the movable body, the spacer being provided with a first groove along the first axis, the spacer being provided with a second groove along the second axis;
and the swing support mechanism can rotate around the cylindrical bearings, so that the movable body can be supported to swing around a first axis with the crossed optical axes and swing around a second axis with the crossed optical axes and the first axis.
Preferably, the spacer includes a flat plate-shaped main body portion, and the first groove and the second groove are each formed on a surface of the main body portion opposite to the fixed body or the movable body.
Preferably, the elastic member includes an inner ring portion, an outer ring portion, and a connecting portion connecting the outer ring portion and the inner ring portion, one of the outer ring portion and the inner ring portion is fixedly connected to the fixed body, the other of the outer ring portion and the inner ring portion is fixedly connected to the movable body, and the spacer is interposed between the elastic member and one of the movable body and the fixed body that is fixedly connected to the outer ring portion.
Preferably, the body portion includes an annular ring portion, and a first extending portion and a second extending portion connected to the annular ring portion, the first extending portion extends along the first axial direction, the second extending portion extends along the second axial direction, the first groove is formed in the first extending portion, and the second groove is formed in the second extending portion.
Preferably, the driving mechanism comprises two groups of driving modules, each group of driving module comprises a permanent magnet and a driving coil arranged opposite to the permanent magnet at intervals, and the two groups of driving modules are respectively arranged on two adjacent side edges of the lens driving device.
Preferably, the movable body includes a first side wall, the first side wall is provided with a mounting groove, and the permanent magnet is fixedly arranged in the mounting groove.
Preferably, the inner collar portion abuts the annular collar portion.
Preferably, the fixing body includes a second side wall, the second side wall is provided with a mounting through hole corresponding to the mounting groove in a penetrating manner, and the driving coil is accommodated in the mounting through hole; the lens driving device further comprises a printed circuit board arranged on the outer side of the first side wall, and the driving coil is electrically connected with the printed circuit board.
Preferably, a first protrusion protruding toward the fixing body is disposed at a position of the spacer corresponding to the first groove, and a first yielding groove is disposed at a position of the fixing body corresponding to the first protrusion; and a second protrusion protruding towards the direction of the movable body is arranged at the position of the spacer corresponding to the second groove, and a second yielding groove is arranged at the position of the movable body corresponding to the second protrusion.
Preferably, the number of the cylindrical bearings is four, the number of the first grooves and the number of the second grooves are two, and the four cylindrical bearings are arranged in the two first grooves and the two second grooves respectively.
The lens driving device provided by the invention has the beneficial effects that:
1. the assembly process is simple, the precision requirement of parts is low, and the cost is low;
2. the printed circuit board occupies less space;
3. the elastic piece can stabilize the movement of the whole system;
4. the hand-shake prevention effect of +/-3 degrees in the two directions of the first axis and the second axis can be realized.
Drawings
Fig. 1 is a perspective view of a lens driving apparatus of the present invention;
fig. 2 is an exploded perspective view of the lens driving apparatus of the present invention;
fig. 3 is a perspective view of the lens driving apparatus of the present invention with the upper case removed;
fig. 4 is a perspective view of the lens driving apparatus of the present invention with the upper case and the fixing body removed;
fig. 5 is a perspective view of the lens driving apparatus of the present invention with the upper case, the fixing body and the printed circuit board removed;
fig. 6 is an exploded perspective view of the fixed body, the spacer, the cylindrical bearing, the elastic member, and the movable body according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
It should be noted that all directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.
It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Referring to fig. 1 and 2, the present invention provides a lens driving device 100, which includes a protective cover 1, a fixed body 2, a movable body 3, a swing supporting mechanism 4, a driving mechanism 5 and a printed circuit board 6. The fixed body 2 is accommodated and fixed in the shield 1, the movable body 3 is used for loading a lens (not shown) and is accommodated in the fixed body 2 and can swing, the swing support mechanism 4 is accommodated in the shield 1 and is used for elastically supporting the movable body 3, the printed circuit board 6 is accommodated in the shield 1 and is fixed on the outer periphery of the fixed body 2, and the driving mechanism 5 is arranged on the inner side surface of the printed circuit board 6 and is electrically connected with the printed circuit board 6.
The protective cover 1 comprises a base 11 and an upper shell 12 fixedly arranged on the base 11, wherein the upper shell 12 is provided with a light inlet hole 121 along the direction of an optical axis L.
As shown in fig. 3 to 5, the swing support mechanism 4 is configured to support the movable body 3 to swing about a first axis a intersecting the optical axis L and to swing about a second axis B intersecting the optical axis L and the first axis a, and specifically, the swing support mechanism 4 includes an elastic member 41, a spacer 42, and a plurality of cylindrical bearings 43, wherein the elastic member 41 is configured to provide an elastic force and stabilize system vibration, one end of the elastic member 41 is fixed to the fixed body 2, and the other end of the elastic member is fixedly connected to the movable body 3, and specifically, the elastic member 41 includes an inner ring portion 411, an outer ring portion 412, and a connecting portion 413 connecting the outer ring portion 412 and the inner ring portion 411, one of the outer ring portion 412 and the inner ring portion 411 is fixedly connected to the fixed body 2, and the other of the outer ring portion 412 and the inner ring portion 411 is fixedly connected to the movable body 3, the spacer 42 is interposed between the elastic member and one of the movable body 3 and the fixed body 2 fixedly connected to the outer ring portion 412, and the movable body 3 is elastically supported in the fixed body 2 by the elastic member 41.
In one embodiment, referring to fig. 1 and 6, the spacer 42 is located between the elastic element 41 and the fixed body 2, the spacer 42 is provided with a first groove 44 along the first axis a, and a second groove 45 along the second axis B, and in particular, the first groove 44 and the second groove 45 are V-shaped grooves.
It should be further noted that the spacer 42 includes a flat plate-shaped main body portion 421, the first groove 44 and the second groove 45 are formed on a surface of the main body portion 421 opposite to the fixed body 2 or the movable body 3, specifically, the main body portion 421 includes an annular ring portion 4211, and a first extension portion 4212 and a second extension portion 4213 connected to the annular ring portion 4211, the first extension portion 4212 extends along the first axis a direction, the second extension portion 4213 extends along the second axis B direction, the first groove 44 is formed on the first extension portion 4212, and the second groove 45 is formed on the second extension portion 4213. The inner ring portion 411 abuts against the annular ring portion 4211.
The swing support mechanism 4 is rotatable around the cylindrical bearing 43, and is configured to support the movable body so as to be swingable around a first axis a intersecting the optical axis L and so as to be swingable around a second axis B intersecting the optical axis L and the first axis a. Specifically, the plurality of cylindrical bearings 43 are respectively mounted in the first groove 44 and the second groove 45, a central axis of the cylindrical bearing 43 located in the first groove 44 coincides with the first axis a, a central axis of the cylindrical bearing 43 located in the second groove 45 coincides with the second axis B, and the cylindrical bearings 43 can rotate in the first groove 44 and the second groove 45, respectively.
The drive mechanism 5 is configured to drive the movable body 3 to oscillate about the first axis a and about the second axis B. Specifically, the driving mechanism 5 includes two sets of driving modules 51, each set of driving module includes a permanent magnet 511, a driving coil 512 disposed opposite to the permanent magnet 511 at an interval, and a magnetizer 513 attached to one side of the permanent magnet 511 away from the driving coil 512, and the two sets of driving modules 51 are respectively disposed on two adjacent sides of the lens driving device 100.
In order to facilitate the installation of the driving mechanism 5, in an embodiment of the present invention, the movable body 3 includes a first side wall 31, a mounting groove 311 is formed on the first side wall 31, and the magnetizer 513 and the permanent magnet 511 are fixedly disposed in the mounting groove 311. The fixing body 2 includes a second side wall 21, a mounting through hole 211 corresponding to the mounting groove 311 is formed in the second side wall 21, and the driving coil 512 is accommodated in the mounting through hole 211.
It should be further noted that the fixing body 2 only includes two adjacent and connected second side walls 21, and therefore, the fixing body 2 only includes two mounting through holes 211; the movable body 3 comprises only two adjacent and connected first side walls 31, and therefore two sets of driving modules 51 are provided corresponding to the two second side walls 21 and the two first side walls 31, respectively.
As further shown in fig. 2 and 6, the number of the cylindrical bearings 43 is specifically four, and the number of the first grooves 44 and the number of the second grooves 45 are two, that is, two first grooves 44 are arranged along the first axis a, and the two first grooves 44 are respectively arranged on two opposite sides of the lens; two second grooves 45 are formed in the direction of the second axis B, the two second grooves 45 are respectively formed in two opposite ends of the lens, and the four cylindrical bearings 43 are respectively arranged in the two first grooves 44 and the two second grooves 45.
A first protrusion 422 protruding toward the fixed body 2 is disposed at a position of the spacer 42 corresponding to the first groove 44, and a first relief groove 20 is disposed at a position of the fixed body 2 corresponding to the first protrusion 422; the spacer 42 is provided with a second protrusion 423 protruding toward the movable body 3 at a position corresponding to the second groove 45, the movable body 3 is provided with a second relief groove 30 at a position corresponding to the second protrusion 423, and the first relief groove 20 and the second relief groove 30 are provided to increase a movable space of the lens in the optical axis L direction.
It should be further noted that the first protrusion 422 is located on the first extension 4212, and the second protrusion 423 is located on the second extension 4213.
The lens driving device 100 provided by the invention has the beneficial effects that:
1. the assembly process is simple, the precision requirement of parts is low, and the cost is low;
2. the printed circuit board occupies less space;
3. the elastic piece can stabilize the movement of the whole system;
4. the hand-shake prevention effect of +/-3 degrees in the two directions of the first axis and the second axis can be realized.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A lens driving apparatus, comprising:
a fixed body;
a movable body for loading the lens and being swingable;
a swing support mechanism for supporting the movable body to be capable of swinging about a first axis intersecting an optical axis and swinging about a second axis intersecting the optical axis and the first axis;
and
a driving mechanism for driving the movable body to swing around the first axis and around the second axis;
wherein, the swing support mechanism includes:
one end of the elastic piece is fixedly arranged on the fixed body, and the other end of the elastic piece is fixedly connected with the movable body;
a spacer located between the fixed body and the movable body, the spacer being provided with a first groove along the first axis and a second groove along the second axis;
and a plurality of cylindrical bearings respectively mounted in the first groove and the second groove, wherein the spacer and the movable body can rotate around the cylindrical bearings, and swing around a first axis intersecting an optical axis and swing around a second axis intersecting the optical axis and the first axis.
2. A lens driving apparatus according to claim 1, wherein said spacer includes a flat plate-like main body portion, and said first groove and said second groove are each formed on a surface of said main body portion opposite to said fixed body or movable body.
3. A lens driving device according to claim 2, wherein said elastic member includes an inner ring portion, an outer ring portion, and a connecting portion connecting said outer ring portion and said inner ring portion, one of said outer ring portion and said inner ring portion is fixedly connected to said fixed body, the other of said outer ring portion and said inner ring portion is fixedly connected to said movable body, and said spacer is interposed between one of said movable body and said fixed body, which is fixedly connected to said outer ring portion, and said elastic member.
4. A lens driving apparatus according to claim 3, wherein said main body portion includes an annular ring portion, and a first extending portion and a second extending portion which are contiguous to the annular ring portion, said first extending portion extending in the first axial direction, said second extending portion extending in the second axial direction, said first groove being formed in said first extending portion, said second groove being formed in said second extending portion.
5. A lens driving device as claimed in claim 1, wherein the driving mechanism comprises two driving modules, each driving module comprises a permanent magnet and a driving coil spaced from the permanent magnet, and the two driving modules are respectively disposed on two adjacent sides of the lens driving device.
6. The lens driving device according to claim 5, wherein the movable body includes a first side wall, the first side wall is provided with a mounting groove, and the permanent magnet is fixedly disposed in the mounting groove.
7. A lens driving device according to claim 4, wherein said inner ring portion abuts against said annular ring portion.
8. The lens driving device according to claim 6, wherein the fixing body includes a second side wall, a mounting through hole provided in the second side wall so as to correspond to the mounting groove is formed therethrough, and the driving coil is accommodated in the mounting through hole; the lens driving device further comprises a printed circuit board arranged on the outer side of the first side wall, and the driving coil is electrically connected with the printed circuit board.
9. A lens driving device according to claim 2, wherein a first protrusion protruding toward the fixing body is provided at a position of the spacer corresponding to the first groove, and a first relief groove is provided at a position of the fixing body corresponding to the first protrusion; and a second protrusion protruding towards the direction of the movable body is arranged at the position of the spacer corresponding to the second groove, and a second yielding groove is arranged at the position of the movable body corresponding to the second protrusion.
10. A lens driving apparatus as claimed in claim 1, wherein the number of the cylindrical bearings is four, the number of the first grooves and the number of the second grooves are two, and four of the cylindrical bearings are respectively mounted in two of the first grooves and two of the second grooves.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011020387.9A CN111929797B (en) | 2020-09-25 | 2020-09-25 | Lens driving device |
| PCT/CN2020/131931 WO2022062162A1 (en) | 2020-09-25 | 2020-11-26 | Lens drive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011020387.9A CN111929797B (en) | 2020-09-25 | 2020-09-25 | Lens driving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111929797A CN111929797A (en) | 2020-11-13 |
| CN111929797B true CN111929797B (en) | 2020-12-15 |
Family
ID=73334161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011020387.9A Active CN111929797B (en) | 2020-09-25 | 2020-09-25 | Lens driving device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111929797B (en) |
| WO (1) | WO2022062162A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929797B (en) * | 2020-09-25 | 2020-12-15 | 常州市瑞泰光电有限公司 | Lens driving device |
| CN112203011B (en) * | 2020-12-08 | 2021-02-19 | 常州市瑞泰光电有限公司 | Imaging device and electronic apparatus |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609193B (en) * | 2009-07-24 | 2011-05-11 | 上海微电子装备有限公司 | Movable optical element adjusting and positioning device |
| JP6137810B2 (en) * | 2012-11-19 | 2017-05-31 | オリンパス株式会社 | DRIVE DEVICE AND IMAGE DEVICE HAVING THE DRIVE DEVICE |
| JP6090636B2 (en) * | 2014-02-28 | 2017-03-08 | パナソニックＩｐマネジメント株式会社 | Blur correction device, lens barrel including the same, and camera system |
| JP2015215546A (en) * | 2014-05-13 | 2015-12-03 | 厦▲門▼新▲鴻▼洲精密科技有限公司Ｘｉｎｈｏｎｇｚｈｏｕ Ｐｒｅｃｉｓｉｏｎ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ，．Ｌｔｄ | Lens drive |
| KR101670139B1 (en) * | 2014-06-20 | 2016-10-27 | 삼성전기주식회사 | Camera module |
| CN204129404U (en) * | 2014-09-30 | 2015-01-28 | 佛山华永科技有限公司 | Camera shake correction device |
| KR101825731B1 (en) * | 2014-12-04 | 2018-03-23 | 에이에이씨 어쿠스틱 테크놀로지스(심천)컴퍼니 리미티드 | Camera lens module with structure for optical image stabilization |
| CN204903926U (en) * | 2015-02-06 | 2015-12-23 | 惠州市大亚湾永昶电子工业有限公司 | Take hand to tremble correction function's lens drive arrangement |
| US10353216B2 (en) * | 2015-07-14 | 2019-07-16 | Nidec Sankyo Corporation | Optical unit with shake correction function and its manufacturing method |
| JP6921601B2 (en) * | 2017-04-21 | 2021-08-18 | 日本電産サンキョー株式会社 | Optical unit with runout correction function |
| CN108303778B (en) * | 2018-02-12 | 2020-09-18 | 瑞声光学解决方案私人有限公司 | Lens driving device |
| CN111929797B (en) * | 2020-09-25 | 2020-12-15 | 常州市瑞泰光电有限公司 | Lens driving device |
-
2020
- 2020-09-25 CN CN202011020387.9A patent/CN111929797B/en active Active
- 2020-11-26 WO PCT/CN2020/131931 patent/WO2022062162A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN111929797A (en) | 2020-11-13 |
| WO2022062162A1 (en) | 2022-03-31 |
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