CN111061029A - Lens driving device - Google Patents
Lens driving device Download PDFInfo
- Publication number
- CN111061029A CN111061029A CN201911397478.1A CN201911397478A CN111061029A CN 111061029 A CN111061029 A CN 111061029A CN 201911397478 A CN201911397478 A CN 201911397478A CN 111061029 A CN111061029 A CN 111061029A
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- CN
- China
- Prior art keywords
- lens
- bracket
- base
- support
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- 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)
- Lens Barrels (AREA)
Abstract
The invention provides a lens driving device which is used for driving a lens to move. The invention has the beneficial effects that: the lens driving device further comprises a first supporting piece and a second supporting piece, wherein the first supporting piece supports the first support to move relative to the second support, the second supporting piece supports the bracket component to move relative to the base, the first supporting piece has rigidity along the optical axis direction of the lens, the first supporting piece has elasticity along the direction vertical to the optical axis of the lens, and the second supporting piece is spherical; when the first support is displaced relative to the second support along the optical axis direction of the lens, the plurality of first support pieces deform to form acting force between the first support and the second support; thereby playing a supporting role and ensuring the inclination performance.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of lenses, in particular to a lens driving device.
[ background of the invention ]
In the conventional lens driving device, in order to realize the optical anti-shake and auto-focusing functions, the mechanical structure is complicated, and the movement stability of the optical lens is poor.
Therefore, a lens driving device with simple structure and stable movement is needed.
[ summary of the invention ]
The invention aims to provide a lens driving device, which aims to solve the problem that a lens barrel support, a ball support and a shell in the conventional lens driving device are connected in a coil and spring sheet or single ball mode, so that the supporting effect is poor.
The technical scheme of the invention is as follows: a lens driving device is used for driving a lens to move, and comprises a base and a bracket assembly arranged in the base, wherein the bracket assembly comprises a first bracket and a second bracket for supporting the first bracket, and the first bracket is used for mounting the lens;
the lens driving device further comprises a driving component, and the driving component drives the bracket component to move relative to the base along the optical axis direction of the lens or drives the first bracket to move relative to the second bracket along the direction perpendicular to the optical axis of the lens;
the lens driving device further comprises a first supporting piece and a second supporting piece, wherein the first supporting piece is used for supporting the first support to move relative to the second support, the supporting piece is used for supporting the second support to move relative to the base, the first supporting piece is used for providing rigidity in the direction of the optical axis of the lens, the first supporting piece is used for providing elasticity in the direction of the optical axis of the lens, and the second supporting piece is spherical.
As an improvement, the second bracket includes a base and a first side frame perpendicular to the base, a first rail groove extending along an optical axis direction of the lens is formed in one side of the first side frame facing the base, a second rail groove matched with the first rail groove is formed in the base, and the second supporting member is installed between the first rail groove and the second rail groove.
As a refinement, the first track groove and the second track groove each comprise first and second spaced apart groove faces, the first and second groove faces being non-parallel.
As an improvement, the first supporting member is a plurality of suspension wires distributed in the circumferential direction of the bracket assembly at intervals, one end of each suspension wire is fixed to the second bracket, and the other end of each suspension wire is fixed to the first bracket.
As an improvement, the first support includes the body and inlays to be located the first stationary blade at body top, the second support include with the second stationary blade that first stationary blade is relative, the both ends of hanging oneself from a net connect respectively in first stationary blade with the second stationary blade, be equipped with on the body and dodge the groove of dodging of hanging oneself from a net.
As an improvement, the lens driving device further includes a first driving component for driving the bracket component to move relative to the base, and a second driving component and a third driving component for driving the first bracket to move relative to the second bracket, wherein the first driving component, the second driving component and the third driving component are distributed on three sides of the four sides of the lens driving device, and the second driving component and the third driving component are distributed on two adjacent sides.
As an improvement, the first driving assembly comprises a first magnetic conductive sheet fixed to the first side frame of the second bracket, a first magnetic steel, and a first coil and a second magnetic conductive sheet fixed to the base, wherein the first coil and the first magnetic steel are opposite at intervals; the first side frame comprises an opening, the first magnetic conductive sheet covers the opening, and the first magnetic steel is fixed on the first magnetic steel.
As an improvement, the first magnetic steel comprises a first magnetic steel piece and a second magnetic steel piece which are overlapped along the optical axis direction of the lens, the magnetizing direction of the first magnetic steel piece is perpendicular to that of the second magnetic steel piece, and the magnetizing directions of the first magnetic steel piece and the second magnetic steel piece are opposite.
As an improvement, the second driving assembly and the third driving assembly respectively comprise a third magnetic conductive sheet fixed on one side wall of the first bracket, second magnetic steel and a second coil fixed on the base, and the second coil and the second magnetic steel are opposite at intervals; and the side wall of the first bracket is provided with an accommodating part for accommodating the third magnetic conductive sheet and the second magnetic steel.
As an improvement, the lens driving device further comprises a circuit board fixed on the periphery of the base, the first coil and the second coils are respectively arranged on the circuit board facing one side of the base, the first magnetic conductive sheet is arranged on the circuit board deviating from one side of the base, and the base is provided with an avoiding port for avoiding the first coil and the second coils.
The invention has the beneficial effects that: the lens driving device is simple in structure and stable in movement.
[ description of the drawings ]
Fig. 1 is a three-dimensional structure diagram of a lens driving device and a lens according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;
FIG. 3 is a schematic illustration of another exploded structure of FIG. 1;
FIG. 4 is an enlarged view of A in FIG. 3;
FIG. 5 is a detailed structural diagram of the bracket assembly and the first support member;
FIG. 6 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 7 is a schematic view illustrating a magnetizing direction of a second magnetic steel in the lens driving device according to an embodiment of the present invention;
fig. 8 is a schematic view illustrating a magnetizing direction of a first magnetic steel in a lens driving device according to an embodiment of the present invention.
[ detailed description ] embodiments
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1 and 2, an embodiment of the present invention provides a lens driving apparatus, including a housing 10 and a bracket assembly 20 accommodated in the housing 10, where the bracket assembly 20 includes a first bracket 21 and a second bracket 22 supporting the first bracket 21, and the first bracket 21 is used for mounting a lens 40. The lens driving device further includes a driving component 50, wherein the driving component 50 can drive the bracket component 20 to move relative to the housing 10 along the optical axis direction of the lens 40 or drive the first bracket 21 to move relative to the second bracket 22 along the direction perpendicular to the optical axis of the lens 40. The lens driving device further includes a first supporting member 31 for supporting the first frame 21 to move relative to the second frame 22, and a second supporting member 32 for supporting the frame assembly 20 to move relative to the housing 10.
In this embodiment, the housing 10 includes a base 12 and a cover 11, the base 12 has a receiving cavity 124, the opening directions of the base 12 and the cover 11 are opposite, and the cover 11 is sleeved outside the base 12. The base 12 can limit the displacement of one end of the bracket assembly 20 along the optical axis direction of the lens 40, and the cover 11 can limit the displacement of the other end of the bracket assembly 20 along the optical axis direction of the lens 40.
The first bracket 21 is disposed in the second bracket 22, the second bracket 22 is accommodated in the accommodating cavity 124, and the second bracket 22 is slidably connected to the base 12.
The first support member 31 has rigidity in the optical axis direction of the lens barrel 40, and the first support member 31 has elasticity in a direction perpendicular to the optical axis of the lens barrel 40; preferably, the plurality of first supporting members 31 are connected between the first bracket 21 and the second bracket 22 for forming a space between the first bracket 21 and the second bracket 22 in the optical axis direction of the lens 40; more preferably, the first supporting member 31 is a plurality of suspension wires distributed at intervals around the circumference of the bracket assembly 20, one end of each suspension wire is fixed to the second bracket 22, and the other end of each suspension wire is fixed to the first bracket 21; when the first support 21 is displaced relative to the second support 22 after the first support 21 receives a driving force from a driving assembly 50 along a direction perpendicular to the optical axis of the lens 40, the plurality of first support members 31 are deformed to form a force between the first support 21 and the second support 22; the acting force is used for driving the first support 21 to reset relative to the second support 22 along the direction perpendicular to the optical axis of the lens 40 after the driving force of the driving assembly 50 disappears. The plurality of first supporting members 31 can play a role in stably supporting the first support 21 when not deformed, and can also play a role in stably supporting the first support 21 by ensuring the tilting performance after being deformed. Preferably, the material of a plurality of suspension wires can be, but is not limited to, shape memory alloy wires.
Referring to fig. 3 to 5, the first bracket 21 includes a body 211 and a first fixing plate 215 embedded in the top of the body 211, and the body 211 is provided with an avoiding groove 214 for avoiding the suspension wires. It should be noted that the first fixing plate 215 includes a main body 215a embedded in the top of the body 211 and an extension 215b located in the avoiding groove 214; the upper surface of the first fixing plate 215 is positioned below the upper surface of the body 211; and a plurality of the suspension wires are fixedly connected with the extension part 215b of the first fixing piece 215.
The second bracket 22 includes a base 224 and a first side frame 223 extending vertically upward (i.e., toward a direction close to the first bracket 21) from the periphery of the base 224, a second side frame 225 opposite to and spaced apart from the first side frame 223, and a third side frame 227 adjacent to the first side frame 223; the first side frame 223, the second side frame 225, and the third side frame 227 also serve to limit the displacement of the first bracket 21. The second bracket 22 further includes a second fixing plate 222 opposite to the first fixing plate 23, specifically, the second fixing plate 222 is disposed on a side of the base 224 close to the first bracket 21, and the other ends of the plurality of suspension wires are respectively fixedly connected to peripheral portions of the second fixing plate 222.
The base 12 includes a bottom plate, and a first side plate 123, a second side plate 125 and a third side plate 126 perpendicularly connected to the bottom plate. The first side plate 123, the second side plate 125 and the third side plate 126 are distributed on three sides of the four sides of the bottom plate, and the second side plate 125 is parallel to the first side plate 123. When the rack assembly 20 is installed in the base 12, the first side frame 223 is opposite to the first side plate 123, the second side frame 225 is opposite to the second side plate 125, and the third side frame 227 is opposite to the third side plate 126. A first track groove 221 extending along the optical axis direction of the lens 40 is formed on one side of the first side plate 123 facing the first side frame 223, and a second track groove 121 matched with the first track groove 221 is formed on one side of the first side plate 123 facing the first side frame 223. A second support 32 is installed between the first rail groove 221 and the second rail groove 121; the second support 32 is used to ensure that the space between the second support 22 and the base 12 is constant and reduce the friction between the second support 22 and the base 12 when the relative movement between the second support 22 and the base 12 occurs. Preferably, the second support 32 is spherical.
The first rail groove 221 and the second rail groove 121 each include a first groove surface P1 and a second groove surface P2 (see fig. 6 for details), which are spaced apart from each other, the first groove surface P1 and the second groove surface P2 are not parallel, and the first groove surface P1 and the second groove surface P2 are substantially arranged in a V shape.
More preferably, a limit block 122 is disposed in the second track groove 121, two sides of the limit block 122 are respectively provided with one second support member 32, and the limit block 122 is used for separating the two second support members 32. Of course, it should be noted that the stopper 122 may be disposed in the first rail groove 221.
The driving assembly 50 includes a first driving assembly 51 for driving the bracket assembly 20 to move relative to the base 12, the first driving assembly 51 includes a first magnetic conductive sheet 511 and a first magnetic steel 512 fixed to the first side frame 223 of the second bracket 22, and a first coil 513 and a second magnetic conductive sheet 514 fixed to the first side plate 123 of the base 12, preferably, a notch 12a avoiding the first coil 513 and the second magnetic conductive sheet 514 is provided on the first side plate 123, and the first coil 513 is opposite to the first magnetic steel 512 at an interval; the first side frame 223 comprises an opening 223a, the first magnetic conductive sheet 511 covers the opening 223a, and the first magnetic steel 512 is fixed to the first magnetic conductive sheet 511; the first magnetic steel 512 includes a first magnetic steel part 512a and a second magnetic steel part 512b stacked along the optical axis direction of the lens 40. The magnetizing directions of the first magnetic steel part 512a and the second magnetic steel part 512b are shown in fig. 8, and the viewing angle of fig. 8 is a side viewing angle (see the viewing angle perpendicular to the XZ plane in fig. 2). The magnetizing directions of the first magnetic steel piece 512a and the second magnetic steel piece 512b are perpendicular to the first side frame 223, and the magnetizing directions of the first magnetic steel piece 512a and the second magnetic steel piece 512b are opposite.
The driving assembly 50 further includes the second driving assembly 52 and the third driving assembly 53 for driving the first bracket 21 to move relative to the second bracket 22, the second driving assembly 52 includes a third magnetic conductive sheet 523 fixed to the first side wall 212 of the first bracket 21, a second magnetic steel 522, and a second coil 521 fixed to the second side plate 125 of the base 12, and the second coil 521 and the second magnetic steel 522 are opposite to each other at intervals; the third driving assembly 53 includes a third magnetic conductive plate 523 fixed to the second side wall 216 of the first bracket 21, a second magnetic steel 522, and a second coil 521 fixed to the third side wall 126 of the base 12, where the second coil 521 and the second magnetic steel 522 are opposite to each other at an interval. The first side wall 212 and the second side wall 216 are both provided with accommodating portions 213 for accommodating the third magnetic conductive plate 523 and the second magnetic steel 522. The second side plate 125 and the third side plate 126 are both provided with notches 12a for avoiding the second coil 521.
Preferably, the magnetizing directions of the second magnetic steels 522 of the second driving assembly 52 and the third driving assembly 53 refer to fig. 7, and the viewing angle of fig. 7 is a top viewing angle (see the viewing angle perpendicular to the XY plane in fig. 2); the magnetizing direction of the second magnetic steel 522 of the second driving assembly 52 is perpendicular to the first sidewall 212, and the magnetizing direction of the second magnetic steel 522 of the third driving assembly 53 is perpendicular to the second sidewall 216.
In this application, the attractive force between the second magnetic conductive piece 514 and the first magnetic steel 512 is used for driving the second bracket 22 along the optical axis direction of the lens 40 relative to the base 12 to reset after the driving force of the driving assembly 50 disappears.
The lens driving device further comprises a circuit board 13 fixed on the periphery of the base 12, the first coil 513 and the second coils 521 are respectively arranged on one side of the circuit board 13 facing the base 12, and the first magnetic conductive sheet 511 is arranged on one side of the circuit board 13 facing away from the base 12.
It should be noted that all the directional indicators (such as upper, lower, 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 drawings), 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.
While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A lens driving device is used for driving a lens to move, and is characterized in that the lens driving device comprises a base and a bracket assembly arranged in the base, wherein the bracket assembly comprises a first bracket and a second bracket for supporting the first bracket, and the first bracket is used for mounting the lens;
the lens driving device further comprises a driving component, and the driving component drives the bracket component to move relative to the base along the optical axis direction of the lens or drives the first bracket to move relative to the second bracket along the direction perpendicular to the optical axis of the lens;
the lens driving device further comprises a first supporting piece and a second supporting piece, wherein the first supporting piece is used for supporting the first support to move relative to the second support, the supporting piece is used for supporting the second support to move relative to the base, the first supporting piece is used for providing rigidity in the direction of the optical axis of the lens, the first supporting piece is used for providing elasticity in the direction of the optical axis of the lens, and the second supporting piece is spherical.
2. A lens driving apparatus according to claim 1, wherein: the second support includes base and perpendicular to the first side frame of base, first side frame orientation the edge is seted up to one side of base the first track groove that the optical axis direction of camera lens extends, seted up on the base with first track groove complex second track groove, second support piece install in first track groove with between the second track groove.
3. A lens driving apparatus according to claim 2, wherein: the first track groove and the second track groove both comprise a first groove surface and a second groove surface which are spaced apart, and the first groove surface and the second groove surface are not parallel.
4. A lens driving apparatus according to claim 1, wherein: the first supporting piece is a plurality of suspension wires distributed in the circumferential direction of the support component at intervals, one end of each suspension wire is fixed to the second support, and the other end of each suspension wire is fixed to the first support.
5. A lens driving apparatus according to claim 4, wherein: the first support includes the body and inlays to be located the first stationary blade at body top, the second support include with the second stationary blade that first stationary blade is relative, the both ends of hanging oneself from a net connect respectively in first stationary blade with the second stationary blade, be equipped with on the body and dodge the groove of dodging of hanging oneself from a net.
6. A lens driving apparatus according to claim 1, wherein: the lens driving device further comprises a first driving component for driving the bracket component to move relative to the base and a second driving component and a third driving component for driving the first bracket to move relative to the second bracket, wherein the first driving component, the second driving component and the third driving component are distributed on three sides of the four sides of the lens driving device, and the second driving component and the third driving component are distributed on two adjacent sides.
7. A lens driving apparatus according to claim 6, wherein: the first driving assembly comprises a first magnetic conductive sheet fixed on the first side frame of the second bracket, first magnetic steel, a first coil fixed on the base and a second magnetic conductive sheet fixed on the base, and the first coil and the first magnetic steel are opposite at intervals; the first side frame comprises an opening, the first magnetic conductive sheet covers the opening, and the first magnetic steel is fixed on the first magnetic steel.
8. A lens driving apparatus according to claim 7, wherein: first magnet steel includes follows the optical axis direction of camera lens stacks first magnetism steel part and second magnetism steel part of establishing, first magnetism steel part with the direction of magnetizing of second magnetism steel part is perpendicular to first side frame, just first magnetism steel part with the direction of magnetizing of second magnetism steel part is opposite.
9. A lens driving apparatus according to claim 8, wherein: the second driving assembly and the third driving assembly respectively comprise a third magnetic conductive sheet fixed on one side wall of the first support, second magnetic steel and a second coil fixed on the base, and the second coil and the second magnetic steel are opposite at intervals; and the side wall of the first bracket is provided with an accommodating part for accommodating the third magnetic conductive sheet and the second magnetic steel.
10. A lens driving apparatus according to claim 9, wherein: the lens driving device further comprises a circuit board fixed on the periphery of the base, the first coil and the second coil are respectively arranged on the circuit board towards one side of the base, the first magnetic conductive sheet is arranged on the circuit board away from one side of the base, and the base is provided with an avoiding opening for avoiding the first coil and the second coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911397478.1A CN111061029A (en) | 2019-12-30 | 2019-12-30 | Lens driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911397478.1A CN111061029A (en) | 2019-12-30 | 2019-12-30 | Lens driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111061029A true CN111061029A (en) | 2020-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911397478.1A Pending CN111061029A (en) | 2019-12-30 | 2019-12-30 | Lens driving device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111061029A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111580324A (en) * | 2020-06-08 | 2020-08-25 | 昆山联滔电子有限公司 | Voice coil motor |
| CN112203011A (en) * | 2020-12-08 | 2021-01-08 | 常州市瑞泰光电有限公司 | Imaging device and electronic apparatus |
| CN113347354A (en) * | 2021-05-28 | 2021-09-03 | 昆山联滔电子有限公司 | Voice coil motor |
| WO2022092673A1 (en) * | 2020-11-02 | 2022-05-05 | 마이크로엑츄에이터(주) | Lens assembly |
| WO2022135255A1 (en) * | 2020-12-23 | 2022-06-30 | 维沃移动通信有限公司 | Camera module, and electronic device |
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| US11733587B2 (en) | 2021-05-28 | 2023-08-22 | Lanto Electronic Limited | Voice coil motor with improved zooming performance |
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Address after: 213000 Xinwei 1st Road, Changzhou Comprehensive Bonded Zone, Jiangsu Province Applicant after: Chengrui optics (Changzhou) Co.,Ltd. Address before: 213000 Xinwei Road, Changzhou Export Processing Zone, Jiangsu Province Applicant before: Ruisheng Communication Technology (Changzhou) Co.,Ltd. |
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Application publication date: 20200424 |