CN215729208U

CN215729208U - OIS lens driving device with high thrust, camera and electronic device

Info

Publication number: CN215729208U
Application number: CN202121831547.8U
Authority: CN
Inventors: 潘涛; 卓英吉; 欧阳建华; 张需要; 张吉龙
Original assignee: Heyuan Youhua Microelectromechanical Technology Co ltd
Current assignee: Heyuan Youhua Microelectromechanical Technology Co ltd
Priority date: 2021-08-06
Filing date: 2021-08-06
Publication date: 2022-02-01
Anticipated expiration: 2031-08-06

Abstract

The utility model relates to an OIS lens driving device with strong thrust, a camera and an electronic device, which comprise a fixing part, a focusing part and a shake compensation part; the fixing part comprises a base and an outer cover buckled on the base; the focusing part comprises a lens seat, a bracket, a first elastic piece and a focusing driving device; the shake compensation part comprises a friction support pair, a second elastic piece and a shake compensation driving device; the shake compensation driving device comprises a magnet, a first compensation coil arranged on the base and a second compensation coil arranged on the inner side of the outer cover, wherein the first compensation coil and the magnet are arranged in a spaced and opposite mode in the direction parallel to the optical axis, and the second compensation coil and the magnet are arranged in a spaced and opposite mode in the direction perpendicular to the optical axis. The utility model provides an OIS lens driving device with strong thrust, which has strong magnetic thrust, and effectively increases the magnetic thrust by using the combined action of a first compensation coil and a second compensation coil, so that a high-pixel large-volume lens can be stably pushed, and the focusing and optical anti-shake functions are stably actuated.

Description

OIS lens driving device with high thrust, camera and electronic device

Technical Field

The present invention relates to the field of optical imaging, and in particular, to an OIS lens driving apparatus with a high thrust, a camera, and an electronic apparatus.

Background

Optical image anti-shake: at the moment when the photographer presses the shutter, the camera may shake slightly to cause image blur. Optical anti-shake means that in a camera or other similar imaging instruments, the arrangement of optical components, such as a lens, avoids or reduces instrument shake phenomenon occurring in the process of capturing optical signals, thereby improving imaging quality. The micro-movement is detected by a gyroscope in the lens and then transmitted to a microprocessor. The processor calculates the displacement required to be compensated immediately, and then compensates according to the shaking direction and the displacement of the lens through the compensation lens group, thereby effectively overcoming the image blur caused by the vibration of the camera. In popular terms, the phenomenon of shooting blurring caused by shaking is prevented through hardware facilities.

Optical anti-shake is a specialized word, which is called Optical Image Stabilization (OIS) in english, and a literal meaning translated from english can be understood as a "stable Optical Image".

The optical anti-shake has two main benefits, one is to improve the slicing rate, and the second is to take a more clear night scene.

After the smart phone has the optical anti-shake addition, the camera lens can counteract the shake of the hand through the shake, the photo is not easy to be blurred, and the filming rate is greatly improved.

When the mobile phone without optical anti-shake shoots a night scene, the shutter time can not be increased generally, because the camera is easy to be blurred after the shutter time is increased, and the photo shot in the shutter time is not increased is dark. And the time of the shutter can be increased after the optical anti-shake is added, so that the light inlet quantity of the lens is increased, and the night scene is brighter and cleaner.

In general, the optical defense is beneficial to improving shooting stability, improving dark light shooting quality, enhancing picture brightness, improving dark part details and the like, and especially has obvious effect of improving the quality of the sample in low and wide (night) environments.

As disclosed in publication 2015100750943, a lens driving apparatus is disclosed that provides an optical anti-shake scheme. There are two main types of current optical anti-shake schemes, suspension scheme and SMA scheme. Specifically, the suspension scheme is as follows: the suspension wires in a friction-free mode are adopted to support the whole focusing part, the whole focusing part is moved to realize anti-shake performance, and the suspension wires are driven in an electromagnetic mode. SMA protocol: similar to the suspension scheme, the whole focusing part is moved to prevent shaking, a friction mode is adopted, the SMA carrier seat at the bottom is provided with four friction supporting parts, and 4 SMA wires are used for driving. The two existing schemes have respective advantages and disadvantages, and have room for improvement.

The OIS motor needs to drive the lens to move to compensate for the shake in order to realize the anti-shake function, the high pixel requirement makes the lens volume become bigger and bigger, the quality of the lens is also increased synchronously, the conventional motor structural design can not provide enough electromagnetic thrust, the large lens with high pixel can not be pushed stably, and the improvement is needed urgently.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an OIS lens driving apparatus with strong thrust, which has strong magnetic thrust, and uses a first compensation coil and a second compensation coil for combined action, wherein the first compensation coil is horizontally disposed, and the second compensation coil is vertically disposed, and under the combined action of the first compensation coil and the second compensation coil, the magnetic thrust is effectively increased, so that a high-pixel large-volume lens can be stably pushed, and stable focusing and optical anti-shake functions are ensured.

The purpose of the utility model is realized by the following technical scheme:

an OIS lens driving device with strong thrust comprises a fixing part, a focusing part and a shaking compensation part. The fixing part comprises a base and an outer cover buckled on the base; a focusing part including a lens holder for carrying an optical lens, a holder provided on an outer peripheral side of the lens holder, a first elastic member elastically connecting the lens holder and the holder and allowing the lens holder to move relative to the holder along an optical axis of the optical lens, and a focus driving device provided between the lens holder and the holder; the shake compensation part comprises a friction support pair, a second elastic piece and a shake compensation driving device, wherein the friction support pair is positioned on the base and used for supporting the mirror base, the second elastic piece is elastically connected with the support and the fixing part, and the shake compensation driving device is arranged between the support and the fixing part; the shake compensation driving apparatus includes: the first compensation coil and the magnet are arranged in a spaced mode in the direction parallel to the optical axis, and the second compensation coil and the magnet are arranged in a spaced mode in the direction perpendicular to the optical axis.

Preferably, the second compensation coil is fixed on a coil holder, and the coil holder is fixed on the base.

Preferably, the friction support pair is spherical in shape.

Preferably, the first elastic part comprises an upper plate spring and a lower plate spring, the inner sides of the upper plate spring and the lower plate spring are connected with the mirror base, and the outer sides of the upper plate spring and the lower plate spring are connected with the bracket; the second elastic part comprises a second upper plate spring which is electrically connected with the focusing driving device.

Preferably, a plurality of upright columns are formed on the base, the upright columns are positioned on the outer sides of the friction support pairs, and the outer sides of the second upper plate springs are connected to the top ends of the upright columns.

Preferably, the upper plate spring and the second upper plate spring are integrally formed, and specifically include a first outer connecting portion, a first intermediate connecting portion, an inner connecting portion, a second intermediate connecting portion, a second outer connecting portion, a first arm portion connected between the first outer connecting portion and the first intermediate connecting portion and extending meanderingly therebetween, a second arm portion connected between the first intermediate connecting portion and the inner connecting portion and extending meanderingly therebetween, a third arm portion connected between the inner connecting portion and the second intermediate connecting portion and extending meanderingly therebetween, a fourth arm portion connected between the second intermediate connecting portion and the second outer connecting portion and extending meanderingly therebetween, the inner side connecting portion is fixedly connected with the mirror base, the first outer side connecting portion and the second outer side connecting portion are respectively connected with a stand column, and the first middle connecting portion and the second middle connecting portion are fixedly connected with the support.

Preferably, the first outer connecting portion or the second outer connecting portion is electrically connected to an external power source, the inner connecting portion is connected to an AF connecting portion, and the AF connecting portion is electrically connected to a coil of the focusing driving device.

Preferably, the base is provided with an AF metal terminal, and the AF metal terminal extends to the top of the pillar and is electrically connected with the first outer connecting portion or the second outer connecting portion.

A camera comprises the OIS lens driving device.

An electronic device comprises the camera.

Compared with the prior art, the utility model has the beneficial effects that:

the lens driving device adopts a brand new lens driving structure different from the traditional suspension scheme and SMA scheme, realizes optical anti-shake, and has the advantages of excellent anti-shake function, stable and reliable effect and simple assembly.

Drawings

Fig. 1 is an exploded view of an OIS lens driving apparatus with a strong thrust according to an embodiment of the present invention.

Fig. 2 is a structural diagram of an OIS lens driving apparatus with strong thrust according to an embodiment of the present invention.

Fig. 3 is a partial exploded view of an OIS lens actuator with high thrust in accordance with an embodiment of the present invention.

Fig. 4 is a partial exploded view of an OIS lens actuator with high thrust in accordance with an embodiment of the present invention.

Fig. 5 is an exploded view of an OIS lens actuator with high thrust in accordance with an embodiment of the present invention.

Fig. 6 is a cross-sectional view of an OIS lens actuator with high thrust in accordance with an embodiment of the present invention.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and the accompanying drawings.

Referring to fig. 1-6, an embodiment of the utility model includes:

an electronic device is used for taking a picture, has excellent optical anti-shake effect and strong magnetic thrust, is particularly suitable for a high-pixel large-volume lens, and mainly comprises an OIS lens driving device with strong thrust, a fixed part, a focusing part 2 and a shake compensation part.

The fixing part comprises a base 1 and an outer cover 3 buckled on the base.

And a focusing part 2 including a lens holder 5 for carrying an optical lens 4, a bracket 8 disposed on an outer peripheral side of the lens holder 5, a first elastic member elastically connecting the lens holder and the bracket and allowing the lens holder to move relative to the bracket along an optical axis of the optical lens, and a focus driving device disposed between the lens holder and the bracket.

The shake compensation part comprises a friction support pair 6 which is positioned on the base 1 and used for supporting the mirror seat 5, a second elastic piece which elastically connects the bracket and the fixing part, and a shake compensation driving device which is arranged between the bracket and the fixing part. The shake compensation driving apparatus includes: the magnet 9 arranged on the bracket, the first compensation coil 23 arranged on the base 1 and the second compensation coil 24 arranged on the inner side of the outer cover, wherein the first compensation coil 23 and the magnet 9 are opposite in a direction parallel to the optical axis in a spaced mode, and the second compensation coil 24 and the magnet 9 are opposite in a direction perpendicular to the optical axis in a spaced mode.

The friction support pair and the first elastic piece form a connecting structure of the focusing part and the fixing part, and the connecting structure allows the focusing part to move relative to the base or the outer cover along the direction vertical to the optical axis of the optical lens so as to realize AF focusing; the friction support pair and the second elastic piece form a connecting structure of the focusing part and the fixing part, and the connecting structure allows the focusing part to move relative to the base along the horizontal direction parallel to the optical lens, so that OIS optical anti-shake is realized.

The lens driving device of this embodiment adopts the brand-new lens drive structure who is different from traditional scheme and SMA scheme of hanging in midair, has realized optics anti-shake, and has the advantage that the anti-shake function is remarkable, the effect is reliable and stable, the assembly is simple to the magnetism thrust structure who has more intensity is provided, can stably drive high pixel bulky camera lens, satisfies people to the demand of high pixel bulky camera lens.

The second compensation coil 24 is fixed on a coil holder 26, and the coil holder 26 is fixed on the base 1. The friction support pair 6 is spherical in shape. The first elastic part comprises an upper plate spring 10 and a lower plate spring 25, the inner sides of the upper plate spring and the lower plate spring are connected with the mirror base, and the outer sides of the upper plate spring and the lower plate spring are connected with the bracket; the second elastic member includes a second upper plate spring electrically connected to the focusing driving device. A plurality of upright columns 11 are formed on the base 1, the upright columns 11 are positioned on the outer sides of the friction support pairs 6, and the outer sides of the second upper plate springs are connected to the top ends of the upright columns 11. The upper plate spring is set in a state of applying a biasing force toward the base to the focusing part.

The upper plate spring 10 and the second upper plate spring are integrally formed, and specifically comprise a first outer connecting portion 12, a first middle connecting portion 13, an inner connecting portion 14, and a second middle connecting portion 15, a second outer connecting portion 16, a first arm portion 17 connected between the first outer connecting portion 12 and the first intermediate connecting portion 13 and extending between them in a meandering manner, a second arm portion 18 connected between the first intermediate connecting portion 13 and the inner connecting portion 14 and extending between them in a meandering manner, a third arm portion 19 connected between the inner connecting portion 14 and the second intermediate connecting portion 15 and extending between them in a meandering manner, and a fourth arm portion 20 connected between the second intermediate connecting portion 15 and the second outer connecting portion 16 and extending between them in a meandering manner, wherein the inner connecting portion 14 is fixedly connected to the lens holder 5, the first outer connecting portion 12 and the second outer connecting portion 16 are respectively connected to a column 11, and the first intermediate connecting portion 13 and the second intermediate connecting portion 15 are both fixedly connected to the bracket 8.

The first outer connecting portion 12 or the second outer connecting portion 16 is electrically connected to an external power source, the inner connecting portion 14 is connected to an AF connecting portion 21, and the AF connecting portion 21 is electrically connected to the coil 7 of the focus driving device.

The base 1 is provided with an AF metal terminal 22, and the AF metal terminal 22 extends to the top of the pillar 11 and is electrically connected to the first outer connecting portion 12 or the second outer connecting portion 16.

The support and the base side wall are provided with V-shaped concave point damping glue, the base side wall is provided with a hole, and a point damping glue position is avoided, so that point damping glue at the bottom of the support and the base can be realized.

The AF and the OIS share a magnet, and electromagnetic thrust is generated by interaction of current applied to a coil and magnetism. The AF part (namely the coil 7) and the magnet generate interaction force to realize the balance movement in the direction of the optical axis so as to realize focusing; the OIS coil (first compensation coil 23 and second compensation coil 24) interacts with the magnet to achieve the OIS optical anti-shake effect. Because the OIS coil fixes the reaction force of the OIS coil, the magnet generates relative motion, and the motion of horizontal displacement required by OIS optical anti-shake is realized.

The lens driving device adopts a brand new lens driving structure different from the traditional suspension scheme and SMA scheme, realizes optical anti-shake, and has the advantages of excellent anti-shake function, stable and reliable effect and simple assembly. Specifically, the focusing part carries an optical lens to realize a focusing function, the plane where the optical lens is located is marked as an X axis and a Y axis, the plane perpendicular to the plane where the optical lens is located is a Z axis, the optical lens focuses along the Z axis, the base carries the whole focusing part, and the outer cover provides a protection function for the focusing part. And a stronger magnetic thrust structure is provided, so that the high-pixel large-volume lens can be stably driven, and the requirements of people on the high-pixel large-volume lens are met.

The use of more than 4 coils realizes the increase of the electromagnetic force of the motor, and can drive a larger lens to realize high-phase picture taking. The AF and OIS springs are integrated into a whole, so that the assembly process is simplified, the assembly is convenient, and the raw material cost and the production cost of the integrated springs are greatly reduced. The XY horizontal movement is realized through the interaction force between the magnet and the coil, so that the OIS optical anti-shake effect can be realized, and the image quality during photographing or shooting can be realized.

Compared with the prior art, the embodiment is characterized in that:

(1) and the suspension of the OIS part is realized by adopting an upper plate spring and a lower plate spring.

(2) The metal terminals are embedded on the base, the upper plate spring is electrically connected, and the on-off control of the coil is realized.

(3) The magnetic conductive metal can be embedded in the bracket, so that the magnet can be conveniently assembled and adsorbed. The supporting device is in mutual contact with steel balls or plastic components with self-lubricating performance, and horizontal movement of Z-direction support and XY-direction is achieved.

(4) The OIS part (X direction, Y direction) of the arrangement of the compensation coils and the magnets generates electromagnetic force by arranging more than 4 compensation coils and magnets in each direction of the bottom and the side, thereby realizing the horizontal movement of the motor.

(5) The coil adopts a multilayer flexible PCB mode to realize the integration of a plurality of coils; other methods may employ multiple air coils for assembly with a single layer of flexible PCB. In addition, 4 compensation coils can be connected in series on the side wall and the bottom of the base by arranging a bonding pad on the base. Or the FPCB coil is manufactured by the FPCB process of the soft and hard combined board.

(6) And terminals are arranged in the BASE, and pads corresponding to the FPCB are arranged to realize connection with the FPCB.

(7) The HALL device assembly position is arranged on the BASE to realize closed-loop control of magnetic field induction in the OIS direction

(8) Corresponding characteristics are arranged on the BASE and the support and used for point damping glue (the aim of restraining only vibration in the motion process of the OIS motor is achieved, and the effective control of a closed loop is achieved).

The present embodiment implements OIS by using an upper plate spring instead of a conventional suspension wire, which can generate a restoring force to ensure a relatively stable state between the focusing part and the base. The friction support pair is arranged on the base and is a spherical surface, and the friction support is arranged between the focusing part and the friction support pair to replace rolling support. When OIS drive starts, drive and focus the portion and remove, at X axle and Y axle direction translation to realize the anti-shake function, wherein lie in friction support pair on the base and focus the portion bottom contact and support whole focus the portion, focus the portion and stably bear and lean on friction support pair, when OIS anti-shake, focus the portion and move with the sliding friction, make upper leaf spring take place the deformation when focusing the portion translation, when anti-shake finishes, upper leaf spring reconversion and to focus the portion production effort, focus the portion and reset under the effect of effort. For increaseing magnetic thrust, use first compensation coil and second compensation coil combined action, wherein first compensation coil level is placed, and the vertical placing of second compensation coil is under combined action between them, effectively increases magnetic thrust for the stable promotion that can of high pixel bulky camera lens, the assurance is focused and optics anti-shake function is stable actuates.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A strong-thrust OIS lens driving apparatus comprising:

a fixing part which comprises a base (1) and an outer cover (3) buckled on the base;

a focusing section (2) including a lens holder (5) for carrying an optical lens (4), a holder (8) provided on an outer peripheral side of the lens holder (5), a first elastic member elastically connecting the lens holder and the holder and allowing the lens holder to move relative to the holder along an optical axis of the optical lens, and a focus driving device provided between the lens holder and the holder;

the shake compensation part comprises a friction support pair (6) which is positioned on the base (1) and used for supporting the mirror seat (5), a second elastic piece which is elastically connected with the support and the fixing part, and a shake compensation driving device arranged between the support and the fixing part;

characterized in that the shake compensation driving device includes: the magnetic compensation device comprises a magnet (9) arranged on a support, a first compensation coil (23) arranged on a base (1) and a second compensation coil (24) arranged on the inner side of an outer cover, wherein the first compensation coil (23) and the magnet (9) are arranged in a spaced mode in the direction parallel to an optical axis, and the second compensation coil (24) and the magnet (9) are arranged in a spaced mode in the direction perpendicular to the optical axis.

2. A high thrust OIS lens actuator as claimed in claim 1 in which the second compensation coil (24) is fixed to a coil holder (26), the coil holder (26) being fixed to the base (1).

3. A high thrust OIS lens actuator as claimed in claim 1 in which the friction support pair (6) is spherical in shape.

4. The strong-thrust OIS lens actuator of claim 1 in which said first resilient member includes upper (10) and lower (25) leaf springs, the inner sides of which are attached to the base and the outer sides to the frame; the second elastic part comprises a second upper plate spring which is electrically connected with the focusing driving device.

5. The OIS lens driving device with strong thrust according to claim 4, wherein a plurality of columns (11) are formed on the base (1), the columns (11) are located at the outer side of the friction support pair (6), and the outer side of the second upper plate spring is connected to the top end of the columns (11).

6. The OIS lens driving device with strong thrust according to claim 5, wherein the upper plate spring (10) and the second upper plate spring are integrally formed, and comprise a first outer connecting portion (12), a first intermediate connecting portion (13), an inner connecting portion (14), a second intermediate connecting portion (15), a second outer connecting portion (16), a first arm portion (17) connected between the first outer connecting portion (12) and the first intermediate connecting portion (13) and extending meanderingly therebetween, a second arm portion (18) connected between the first intermediate connecting portion (13) and the inner connecting portion (14) and extending meanderingly therebetween, a third arm portion (19) connected between the inner connecting portion (14) and the second intermediate connecting portion (15) and extending meanderingly therebetween, a fourth arm portion (20) connected between the second intermediate connecting portion (15) and the second outer connecting portion (16) and extending meanderingly therebetween, the endoscope comprises an endoscope base (5), an inner side connecting portion (14), a first outer side connecting portion (12) and a second outer side connecting portion (16), a stand column (11) and a first middle connecting portion (13) and a second middle connecting portion (15), wherein the inner side connecting portion (14) is fixedly connected with the endoscope base (5), the first outer side connecting portion and the second outer side connecting portion are respectively connected with the stand column (11), and the first middle connecting portion and the second middle connecting portion (15) are fixedly connected with a support (8).

7. The OIS lens driving device with strong thrust according to claim 6, wherein the first outer connecting portion (12) or the second outer connecting portion (16) is electrically connected to an external power source, the inner connecting portion (14) is connected to an AF connecting portion (21), and the AF connecting portion (21) is electrically connected to the coil (7) of the focus driving device.

8. The OIS lens driving device with strong thrust according to claim 5, wherein an AF metal terminal (22) is provided on the base (1), and the AF metal terminal (22) extends to the top of the pillar (11) and is electrically connected with the first outer connecting portion (12) or the second outer connecting portion (16).

9. A camera comprising a high thrust OIS lens actuator as claimed in any one of claims 1 to 8.

10. An electronic device comprising the camera of claim 9.