WO2022000552A1

WO2022000552A1 - Lens driving device

Info

Publication number: WO2022000552A1
Application number: PCT/CN2020/101500
Authority: WO
Inventors: 史卫领; 郭顺; 王洪兴
Original assignee: 诚瑞光学(常州)股份有限公司
Priority date: 2020-06-30
Filing date: 2020-07-10
Publication date: 2022-01-06
Also published as: CN214011594U

Abstract

The present utility model provides a lens driving device. The lens driving device comprises a lens barrel, a first housing, a second housing, a first driving device, and a second driving device; the lens barrel is used for mounting of a lens; the first driving device is used for implementing movement or rotation of the lens barrel within the plane of an optical axis; the second driving device is used for implementing movement or rotation of the lens within a plane perpendicular to the plane of the optical axis; the second driving device comprises a coil and a soft magnetic piece opposite to each other. In the present utility model, the coordination between the first driving device and the second driving device can implement the movement or rotation of the lens within the plane perpendicular to the plane of the optical axis and within the plane of the optical axis, so that the lens can have the shake compensation function in yaw, pitch, and roll directions at the same time, and the roll is independent of the pitch and the yaw.

Description

lens drive

【 Technical field 】

The utility model relates to the field of optical anti-shake, in particular to a lens driving device.

【 Background Technology 】

The shake compensation of the lens driving device of the existing optical device generally only has the shake compensation in the yaw and pitch directions, and has no shake compensation function in the roll direction.

Therefore, it is necessary to provide a lens driving device that can realize anti-shake in the rolling direction.

【 Content of utility model 】

The purpose of the utility model is to provide a lens driving device which can realize anti-shake in the rolling direction.

The technical scheme of the present utility model is as follows:

A lens driving device, the lens driving device comprises:

a lens barrel, the lens barrel is used to mount the lens;

a first casing, the lens barrel is installed in the first casing, and the lens barrel can move or rotate relative to the first casing;

a second casing, the first casing is installed in the second casing, and the first casing can move or rotate relative to the second casing;

A first driving device and a second driving device, the first driving device is provided between the lens barrel and the first housing and the second driving device is provided between the first housing and the first housing Between the two housings, or, the first driving device is arranged between the first housing and the second housing and the second driving device is arranged between the lens barrel and the first housing between the bodies

The first driving device is used to realize the movement or rotation of the lens barrel in the plane where the optical axis is located, and the second driving device is used to realize the movement or rotation of the lens barrel in the plane perpendicular to the optical axis; The second driving device includes a coil and a soft magnetic sheet which are arranged oppositely.

Further, the plane where the coil assembly is located and the plane where the soft magnetic sheet is located are both perpendicular to the first casing.

Further, the coil assembly includes an iron core and a coil wound around the iron core.

Further, the second driving device includes two coil assemblies, and the two coil assemblies are respectively disposed on two sides of the soft magnetic sheet.

Further, the first housing includes a first bottom plate, a first cover plate disposed opposite to the first bottom plate, and a first bottom plate and the first cover plate connected to the first cover plate and extending along the direction of the optical axis a side plate, the first cover plate is provided with a first light-passing hole penetrating the first cover plate;

The second housing includes a second bottom plate, a second cover plate opposite to the second bottom plate, and a second side plate connecting the second bottom plate and the second cover plate and extending along the optical axis direction, The second cover plate is provided with a second light-passing hole penetrating the second cover plate;

One of the coil assembly and the soft magnetic sheet is connected to the first side plate, and the other of the coil assembly and the soft magnetic sheet is connected to the second side plate;

The lens driving device further includes a first fulcrum structure, the first fulcrum structure is connected between the first bottom plate and the second bottom plate, and is used for supporting the rotation of the first housing.

Further, the first shell and the second shell are configured as hollow quadrangular prisms, the first side plate is surrounded by four sides of the first shell, and the second side plate is surrounded by four sides of the first shell. Set as the four sides of the second casing; the second drive devices are set as four and equally spaced on the four sides of the first casing and the four sides of the second casing. Between the side surfaces, the four second driving devices are respectively located near the four edges of the first shell; the plane where the coil assembly is located and the plane where the soft magnetic sheet is located are parallel to the first shell body.

Further, the first fulcrum structure includes a first spherical convex portion, the first spherical convex portion is connected to the first bottom plate, and the second shell is provided with a first spherical convex portion corresponding to the first spherical convex portion. The first rolling groove is matched with the ball convex part, the first ball convex part is accommodated in the first rolling groove, and the first ball convex part can move or rotate in the first rolling groove.

Further, the first driving device includes a first magnetic steel assembly and a first coil assembly that are opposite to each other, and one of the first magnetic steel assembly and the first coil assembly is fixed to the first shell body, and the other is fixed to the lens barrel.

Further, the lens driving device further includes a first elastic structure, the first elastic structure is connected between the first side plate and the second side plate, and the first elastic structure is used to support the first side plate case.

The beneficial effect of the utility model is that: the application interacts with the soft magnetic sheet through the coil assembly to generate a driving force for driving the movement or rotation of the first housing in a plane perpendicular to the optical axis, and at the same time, the first driving device can drive The movement or rotation of the lens barrel in the plane where the optical axis is located, so that the first driving device and the second driving device cooperate to realize the movement or rotation of the lens in the plane perpendicular to the optical axis and in the plane where the optical axis is located, thereby realizing the lens. At the same time, it has the function of jitter compensation in the yaw, pitch and roll directions, and the roll is independent of pitch and yaw.

【 Description of drawings 】

1 is a schematic structural diagram of a lens driving device provided by an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of the lens driving device in FIG. 1 with the second casing removed;

3 is a schematic cross-sectional view of FIG. 1 along A-A;

Figures 4 and 5 are the top views of the second cover plate removed by the lens driving device, respectively showing the rotation of the first housing in two opposite directions;

FIG. 6 is a schematic structural diagram of a lens driving device according to another embodiment of the present invention.

FIG. 7 is a schematic structural diagram of the lens driving device in FIG. 6 with the second casing removed;

FIG. 8 is a schematic cross-sectional view along B-B of FIG. 6 .

In the picture:

100, lens drive device; 1, lens barrel; 2, first housing; 3, second housing; 4, second drive device; 41, soft magnetic sheet; 42, coil assembly; 421, coil; 422, iron Core; 21, the first bottom plate; 22, the first side plate; 23, the first cover plate; 230, the first light-passing hole; 31, the second bottom plate; 32, the second side plate; 33, the second cover plate; 330, the second light-passing hole; 5, the first fulcrum structure; 51, the first connecting piece; 52, the first ball convex part; 310, the first rolling groove; 6, the first elastic structure; 61, the first connecting part ; 62, the second connecting part; 63, the elastic connecting bar; 7, the first driving device; 71, the magnetic steel assembly; 72, the coil assembly; 8, the second fulcrum structure; 81, the second connecting piece; Ball convex part; 210, second rolling groove; 9, second elastic structure.

[ Specific implementation ]

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

1-8, a lens driving device 100, the lens driving device 100 includes:

Lens barrel 1, the lens barrel 1 is used to install the lens;

a first casing 2, the lens barrel 1 is installed in the first casing 2, and the lens barrel 1 can move or rotate relative to the first casing 2;

a second casing 3, the first casing 2 is installed in the second casing 3, and the first casing 2 can move or rotate relative to the second casing 3;

A first driving device 7 and a second driving device 4, the first driving device 7 is arranged between the lens barrel 1 and the first housing 2 and the second driving device 4 is arranged in the first between the housing 2 and the second housing 3, or, the first driving device 7 is provided between the first housing 2 and the second housing 3 and the second driving device 4 is arranged between the lens barrel 1 and the first housing 2;

The first driving device 7 is used to realize the movement or rotation of the lens barrel 1 in the plane where the optical axis is located, and the second driving device 4 is used to realize the movement or rotation of the lens barrel 1 in the plane perpendicular to the optical axis. Move or rotate; the second driving device 4 includes a coil assembly 42 and a soft magnetic sheet 41 arranged oppositely.

In the present application, the coil assembly 42 interacts with the soft magnetic sheet 41 to generate a driving force that drives the movement or rotation of the first housing 2 in a plane perpendicular to the optical axis. At the same time, the first driving device 7 can drive the lens barrel 1 to The movement or rotation in the plane where the optical axis is located, thus, the cooperation of the first driving device 7 and the second driving device 4 can realize the movement or rotation of the lens in the plane perpendicular to the optical axis and in the plane where the optical axis is located, thereby realizing the simultaneous movement or rotation of the lens. Shake compensation in yaw, pitch and roll directions is provided, and roll is independent of pitch and yaw.

In this embodiment, the coil assembly 42 is fixed to the second casing 3, and the soft magnetic sheet 41 is fixed to the first casing 2. Of course, in other optional embodiments, the coil assembly 42 can also be fixed to the first casing 2. The casing 2 and the soft magnetic sheet 41 are fixed to the second casing 3 . Preferably, the plane where the coil assembly 42 is located and the plane where the soft magnetic sheet 41 is located are both perpendicular to the first casing 2 . The coil assembly 42 and the soft magnetic sheet 41 mutually generate a force perpendicular to the plane where the coil assembly 42 or the soft magnetic sheet 41 is located.

When the coil assembly 42 is energized, the coil assembly 42 and the soft magnetic sheet 41 attract each other, generating a force perpendicular to the plane where the coil assembly 42 and the soft magnetic sheet 41 are located. When the lens is in a normal state, the coil is energized. The components 42 pass currents of different sizes, thereby controlling the coil components 42 and the soft magnetic sheet 41 to move away from or approach each other, thereby driving the first housing 2 to move or rotate in the plane (XY plane) perpendicular to the optical axis (Z axis). , or to drive the rolling of the first casing 2 around the optical axis (Z axis). For details, please refer to FIG. 3 , FIG. 4 and FIG. 5 , wherein FIG. 4 and FIG. 5 respectively illustrate the rotation of the first housing 2 in two opposite directions. Generally, the second casing 3 is fixedly connected to the electronic product.

Preferably, the coil assembly 42 includes an iron core 422 and a coil 421 wound outside the iron core 422 . After the coil 421 is energized, the coil 421 and the iron core 422 work together to generate a more effective magnetic field.

In another embodiment, the second driving device 4 includes two coil assemblies 42 , and the two coil assemblies 42 are respectively disposed on two sides of the soft magnetic sheet 41 . Please refer to FIG. 6-FIG. 8 for details. In this way, both sides of the soft magnetic sheet 41 can be attracted by the attraction force, and when the coil assembly 42 on one side is energized, the soft magnetic sheet 41 is attracted by the side, thereby driving the first A housing 2 moves or rotates.

In other embodiments, the first shell 2 and the second shell 3 are formed as hollow quadrangular prisms, and the first side plate 22 is surrounded by four sides of the first shell 2 , The second side plate 32 is surrounded by four sides of the second casing 3 ; the second driving devices 4 are arranged in four and are respectively arranged on the four sides of the first casing 2 at equal intervals. Between the side surface and the four side surfaces of the second housing 3, the four second driving devices 4 are respectively located near the four edges of the first housing 2; The planes where the soft magnetic sheet 41 is located are all parallel to the first casing 2 . In this embodiment, when the coil assembly 42 is energized, the coil assembly 42 and the soft magnetic sheet 41 attract each other to generate a force perpendicular to the plane where the coil assembly 42 and the soft magnetic sheet 41 are located. act to drive the first housing 2 to move or rotate in the plane (XY plane) perpendicular to the optical axis (Z axis), or drive the first housing 2 to roll around the optical axis (Z axis).

Preferably, the first housing 2 includes a first bottom plate 21 , a first cover plate 23 opposite to the first bottom plate 21 , and a first cover plate 23 connecting the first bottom plate 21 and the first cover plate 23 along the optical axis direction the extended first side plate 22, the first cover plate 23 is provided with a first light-passing hole 230 passing through the first cover plate 23;

The second casing 3 includes a second bottom plate 31 , a second cover plate 33 opposite to the second bottom plate 31 , and a second cover plate 33 connecting the second bottom plate 31 and the second cover plate 33 and extending along the optical axis direction the second side plate 32, the second cover plate 33 is provided with a second light-passing hole 330 passing through the second cover plate 33;

One of the coil 421 and the soft magnetic sheet 41 is connected to the first side plate 22, and the other of the coil 421 and the soft magnetic sheet 41 is connected to the second side plate 32;

The lens driving device 100 further includes a first fulcrum structure 5 , the first fulcrum structure 5 is connected between the first bottom plate 21 and the second bottom plate 31 for supporting the first housing 2 to rotate .

In this embodiment, the coil 421 is connected to the second side plate 32, and the soft magnetic sheet 41 is connected to the first side plate 22; in other embodiments, the coil 421 can also be connected to The first side plate 22 and the soft magnetic sheet 41 are connected to the second side plate 32 .

The first fulcrum structure 5 includes a first spherical convex portion 52 connected to the first bottom plate 21 , and the second housing 3 is provided with the first spherical convex portion 52 . The first rolling groove 310 is matched with 52 , the first ball convex portion 52 is accommodated in the first rolling groove 310 , and the first ball convex portion 52 can move or rotate in the first rolling groove 310 . The first rolling groove 310 can be a bar-shaped groove, so, under the driving of the second driving device 4, the first housing 2 can move along the first rolling groove 310, and the first rolling groove 310 can also be a hemispherical groove, so , under the driving of the second driving device 4 , the first casing 2 can rotate relative to the second casing 3 .

Preferably, the first fulcrum structure 5 further includes a first connecting member 51 connected between the first spherical convex portion 52 and the first bottom plate 21 .

Preferably, the lens driving device 100 further includes a first elastic structure 6, the first elastic structure 6 is connected between the first side plate 22 and the second side plate 32, and the first elastic structure 6 is used for supporting the first shell 2 .

Preferably, the first elastic structure 6 includes a first connecting portion 61 connected to the first side plate 22 , a second connecting portion 62 connected to the second side plate 32 , and a second connecting portion 62 connected to the first connecting portion 61 and the second side plate 32 obliquely. Elastic connecting strips 63 between the second connecting parts 62 . The elastic connecting bar 63 is connected obliquely between the first connecting portion 61 and the second connecting portion 62 , plays the role of connecting the first side plate 22 and the second side plate 32 , and provides a restoring force for the movement of the first casing 2 .

The first driving device 7 is used to realize the movement or rotation of the lens barrel 1 in the plane where the optical axis is located, and the first driving device 7 includes a first magnetic steel component 71 and a first coil component 72 that are arranged opposite to each other. , one of the first magnetic steel assembly 71 and the first coil assembly 72 is fixed to the first housing 2 , and the other is fixed to the lens barrel 1 .

Preferably, the lens driving device 100 further includes a second fulcrum structure 8 connected between the first base plate 21 and the lens barrel 1 , and the second fulcrum structure 8 is used to support the lens barrel 1 relative to the lens barrel 1 . The first housing 2 moves or rotates.

Preferably, the second fulcrum structure 8 includes a second connecting piece 81 and a second spherical convex portion 82 , the second connecting piece 81 is connected to the lens barrel 1 , and the second spherical convex portion 82 is connected to the second connecting piece On the side of the component 81 facing away from the lens barrel 1 , the first bottom plate 21 is provided with a second rolling groove 210 which is matched with the second spherical convex portion 82 . The second ball protrusions 82 are accommodated in the second rolling grooves 210 , and the second ball protrusions 82 can move or rotate in the second rolling grooves 210 . The second rolling groove 210 can be a bar-shaped groove, so that the lens barrel 1 can move along the second rolling groove 210 under the driving of the first driving device 7 , and the second rolling groove 210 can also be a hemispherical groove. Driven by the first driving device 7 , the lens barrel 1 can rotate relative to the first housing 2 .

The lens driving device 100 further includes a second elastic structure 9 disposed between the lens barrel 1 and the first side plate 22. The second elastic structure 9 is used to support the lens barrel 1 relative to the first housing 2. The second elastic structure 9 is connected to the lens barrel 1. The first elastic structure 6 is similar in structure.

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to The scope of protection of the utility model.

Claims

A lens driving device, characterized in that the lens driving device comprises:

a lens barrel, the lens barrel is used to mount the lens;

a first casing, the lens barrel is installed in the first casing, and the lens barrel can move or rotate relative to the first casing;

a second casing, the first casing is installed in the second casing, and the first casing can move or rotate relative to the second casing;

A first driving device and a second driving device, the first driving device is provided between the lens barrel and the first housing and the second driving device is provided between the first housing and the first housing Between the two housings, or, the first driving device is arranged between the first housing and the second housing and the second driving device is arranged between the lens barrel and the first housing between the bodies

The first driving device is used to realize the movement or rotation of the lens barrel in the plane where the optical axis is located, and the second driving device is used to realize the movement or rotation of the lens barrel in the plane perpendicular to the optical axis; The second driving device includes oppositely arranged coil components and soft magnetic sheets.
The lens driving device according to claim 1, wherein the plane where the coil assembly is located and the plane where the soft magnetic sheet is located are both perpendicular to the first casing.
The lens driving device according to claim 1, wherein the coil assembly comprises an iron core and a coil wound around the iron core.
The lens driving device according to claim 2, wherein the second driving device comprises two coil assemblies, and the two coil assemblies are respectively disposed on two sides of the soft magnetic sheet.
The lens driving device according to claim 1, wherein the first casing comprises a first bottom plate, a first cover plate opposite to the first bottom plate, and a first cover plate connecting the first bottom plate and the first bottom plate. a cover plate and a first side plate extending in the direction of the optical axis, the first cover plate is provided with a first light-passing hole penetrating the first cover plate;

The second housing includes a second bottom plate, a second cover plate opposite to the second bottom plate, and a second side plate connecting the second bottom plate and the second cover plate and extending along the optical axis direction, The second cover plate is provided with a second light-passing hole penetrating the second cover plate;

One of the coil assembly and the soft magnetic sheet is connected to the first side plate, and the other of the coil assembly and the soft magnetic sheet is connected to the second side plate;

The lens driving device further includes a first fulcrum structure, the first fulcrum structure is connected between the first bottom plate and the second bottom plate, and is used for supporting the rotation of the first housing.
The lens driving device according to claim 5, wherein the first casing and the second casing are both set as hollow quadrangular prisms, and the first side plate surrounds the first casing The four sides of the body, the second side plate surrounds the four sides of the second casing; the second driving devices are arranged in four and are respectively arranged on the first casing at equal intervals. Between the four side surfaces and the four side surfaces of the second casing, the four second driving devices are respectively located at positions close to the four edges of the first casing; the plane where the coil assembly is located and the The planes where the soft magnetic sheets are located are all parallel to the first casing.
The lens driving device according to claim 5, wherein the first fulcrum structure comprises a first spherical convex portion, the first spherical convex portion is connected to the first base plate, and the second housing is A first rolling groove matched with the first ball convex part is opened, the first ball convex part is accommodated in the first rolling groove, and the first ball convex part can move in the first rolling groove or turn.
The lens driving device according to claim 1, wherein the first driving device comprises a first magnetic steel component and a first coil component that are disposed opposite to each other, the first magnetic steel component and the first coil One of the components is fixed to the first casing, and the other is fixed to the lens barrel.
The lens driving device according to claim 5, wherein the lens driving device further comprises a first elastic structure, and the first elastic structure is connected between the first side plate and the second side plate, so that the The first elastic structure is used for supporting the first casing.
The lens driving device according to claim 5, wherein the lens driving device further comprises a second fulcrum structure, and the second fulcrum structure is connected between the first base plate and the lens barrel, and is used for The second housing is supported to move or rotate.