CN212379695U - Anti-shake motor - Google Patents

Abstract

The utility model discloses an anti-shake motor, which comprises an axis variation submodule for adjusting the focal length of a lens, wherein the inner wall of the axis variation submodule is provided with an internal thread for installing the lens; and the shaft variation submodule is sleeved outside the shaft variation submodule and is used for adjusting the deflection direction of the central shaft of the shaft variation submodule. The utility model discloses anti-shake motor is through setting up axle variable submodule piece, will zoom the module and set up to the axle change submodule piece that can deflect, according to inclination sensor's signal, changes the inclination of axle change submodule piece through control shaft adjusting coil, makes the optical axis stably aim at the shot object. Because the distance between the center of the optical axis and the shot object is longer, the change of the rotation angle of the lens can compensate larger shake, and the anti-shake performance is greatly improved.

Description

Anti-shake motor

Technical Field

The utility model relates to an anti-shake motor for portable equipment's such as cell-phone, notebook computer camera anti-shake.

Background

During shooting, various factors such as hand shake cause a certain amount of offset of a shot object in the X-Y axial direction aiming at the center position of the optical axis of the lens, and the offset of the optical axis causes the shot image to be blurred. The image sensor of portable equipment such as a mobile phone and the like has smaller size, and the shutter time required for obtaining a clear image is longer than that of a professional camera such as a single lens reflex camera and the like; anti-shake is more important.

At present, a translation type anti-shake structure supported by suspension wires and the like is basically adopted, the length of the suspension wires is changed by current, a lens is driven to move along the X-Y axis in the opposite direction, and the moving amplitude between the center of an optical axis and a shot object is reduced.

SUMMERY OF THE UTILITY MODEL

Utility model people find the relatively poor reason of camera anti-shake performance of portable equipment such as cell-phone not only because its image sensor size is little, needs longer sensitization time. The more important reasons are: the lens module of the portable equipment has small size and limited offset distance, so that the jitter amplitude in the shooting process cannot be completely compensated; the camera can only process the stage with small jitter amplitude, and the compensation processing cannot be performed in most of time. How to realize compensation of the jitter full period and improve the key point of the anti-jitter effect. As shown in fig. 1, the utility model has found that the size of the camera is small; the distance between the shot object A and the lens B far exceeds the distance between the lens B and the image sensor C. If the horizontal movement of the camera is changed into deflection movement, the image correction distance e generated by deflection is far smaller than the jitter distance d; obviously, the adoption of lens deflection can realize the great reduction of deflection distance; compensation of the full period of the jitter is fully achieved. Since the deflection angle is small, adjusting the deformation of the image due to deflection basically does not burden the graphics processing software. Therefore, the utility model discloses the people have designed a neotype structure for the camera can take place deflection of little angle as required in the camera lens module.

The utility model aims at providing an anti-shake motor which has novel and unique structure and convenient use and can effectively improve the anti-shake performance; the specific technical scheme is as follows:

an anti-shake motor comprises an axis variation submodule for adjusting the focal length of a lens, wherein the inner wall of the axis variation submodule is provided with an internal thread for mounting the lens; and the shaft variation submodule is sleeved outside the shaft variation submodule and is used for adjusting the deflection direction of the central shaft of the shaft variation submodule.

Further, the shaft variation submodule comprises a shell and a base, and the shell and the base are installed to form an accommodating cavity of the shaft variation submodule; a gap is formed between the outer wall of the shaft variation submodule and the inner wall of the accommodating cavity; the outer wall of the shaft changing submodule is elastically connected with the inner wall of the accommodating cavity through a shaft adjusting spring; the front, back, left and right directions of the axis variation submodule are provided with magnets; and the corresponding positions of the shell or the base are provided with shaft adjusting coils for driving the magnets to move up and down.

Further, the spring is divided into an upper spring and a lower spring; the lower spring is two parts which are arranged in bilateral symmetry and are respectively used as conducting wires to be connected with two wiring ends of the zooming coil of the axis variation submodule.

Further, the shaft variation submodule is provided with an upper cover, a zooming upper spring, an AF module, a zooming lower spring and a lower cover from top to bottom in sequence; the magnet is fixed between the upper cover and the lower cover, and the AF module is elastically fixed on the upper cover and the lower cover through a zooming upper spring at the upper end and a zooming lower spring at the lower end respectively; the AF module is provided with zoom coils in a circumferential direction.

Furthermore, the zooming lower spring is two parts which are arranged in bilateral symmetry and are respectively used as conducting wires to be connected with two wiring ends of the zooming coil.

Further, the lower cover is provided with two wiring ends which are respectively connected with the two parts of the zooming lower spring.

The utility model discloses anti-shake motor is through setting up axle variable submodule piece, will zoom the module and set up to the axle change submodule piece that can deflect, according to inclination sensor's signal, changes the inclination of axle change submodule piece through control shaft adjusting coil, makes the optical axis stably aim at the shot object. Because the distance between the center of the optical axis and the shot object is longer, the change of the rotation angle of the lens can compensate larger shake, and the anti-shake performance is greatly improved.

Drawings

FIG. 1 is a schematic view of the working principle of the anti-shake motor of the present invention;

FIG. 2 is a schematic view of the working structure of the anti-shake motor of the present invention;

FIG. 3 is an exploded view of FIG. 2;

FIG. 4 is a schematic structural view of a shaft adjusting portion;

FIG. 5 is a schematic view of a spring on the adjustment shaft;

FIG. 6 is a schematic view of the structure of the lower spring of the adjusting shaft;

FIG. 7 is a schematic structural view of a shaft set submodule;

FIG. 8 is a schematic top view of a base structure;

FIG. 9 is a bottom view of the base structure;

FIG. 10 is a schematic structural diagram of an AF module;

FIG. 11 is a schematic view of a zoom upper spring structure;

FIG. 12 is a schematic view of a zoom lower spring structure;

FIG. 13 is a bottom view of the housing, alignment shaft upper spring, FPC board and upper cover assembly;

FIG. 14 is a schematic view of the assembled inner structure of the spring and the housing on the adjusting shaft;

FIG. 15 is a schematic view of the assembly of the spring on the adjustment shaft and the upper cover;

FIG. 16 is a schematic view of the assembly of the base, the lower spring of the adjusting shaft, and the lower cover;

FIG. 17 is a schematic view of the assembly of the lower spring of the adjustable shaft and the base;

fig. 18 is a bottom view of the shaft adjustment lower spring assembled with the lower cover.

In the figure: 1. a shaft variation submodule; 110. A housing; 111. the shell is provided with a raised step; 120. adjusting a spring on the shaft; 121. a spring wire; 122. a spring fixing end; 123. a hanging object fixing end; 130. an FPC board; 131. an axis adjusting coil; 132. a shaft adjusting terminal; 2. an axis variation submodule; 210. an upper cover; 211. an upper cover recess; 220. a magnet; 230. zooming an upper spring; 231. a spring wire; 232. a spring fixing point; 233. hanging object fixing points; 240. an AF module; 241. a zoom coil; 242. a lens carrier; 250. a zoom lower spring; 251. a spring wire; 252. a spring fixing point; 253. hanging object fixing points; 260. a lower cover; 261. a conductive terminal pin; 262. a lower cover recess; 3. a shaft change base module; 310. adjusting a shaft lower spring; 311. a spring wire; 312. a spring fixing point; 313. hanging object fixing points; 320. a base; 321. a common axis variable lead; 322. a first axial lead; 323. a second axis variable lead; 324. a third axis variable lead; 325. a fourth axis variable lead; 326. an AF power-on pin; 327. an AF ground pin; 328. the base is provided with a raised step; A. a subject; B. a lens; C. an image sensor; d. a shaking distance; e. an image correction distance; s, X/Y-axis direction gap.

Detailed Description

The present invention will be more fully described with reference to the following examples. The present invention may be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 2 and 3, the anti-shake motor in this embodiment includes an axis-changing sub-module 2 for adjusting the focal length of a lens, and an internal thread for mounting the lens (not shown in the figure) is disposed on a central inner wall of the axis-changing sub-module 2; the outside of the shaft variation submodule 2 is also sleeved with a shaft variation submodule 1 for adjusting the deflection direction of the central shaft of the shaft variation submodule, and the shaft variation submodule 2 is used for correspondingly correcting and correcting the deviation of the axial position of the optical axis generated by shaking in the shooting process. The axial deviation correction and correction process is mainly realized by controlling the current intensity flowing to the axis adjusting coil 131 of the FPC board 130 in the axis variation submodule 2, and the axis adjusting coil 131 and the magnet 220 in the axis variation submodule 2 interact to generate an electromagnetic driving force which drives the axis variation submodule 2 to do axial angle deviation correction movement according to a certain direction.

Specifically, after the corresponding current is applied to the axis adjusting coil 131 on each side, the axis adjusting coil 131 on each side generates the electromagnetic force in the up-down direction required by the positions on the four sides according to the strength of the applied current and the interaction between the magnets 220, and according to the fleming's left-hand rule, the electromagnetic force applied on each of the four sides drives the axis changing submodule 2 to perform the axial angle deflection motion, so that the angular rotation of the axis changing submodule 2 finally stays at the position point when the resultant force of the electromagnetic forces generated between the axis adjusting coils 131 on the four sides and the magnets 220 on the four sides and the resultant force of the elastic forces of the upper and lower axis adjusting springs 120 and 310 reach the balanced state. The axis-changing submodule 2 can be controlled to move to the target angle position by applying a predetermined current to the four-side axis-adjusting coil 131, so as to achieve the anti-shake purpose of axial offset correction.

The shaft-to-base module 3 includes a base 320 and an axle adjusting lower spring 310. The shaft variable submodule 1 comprises a shell 110, a shaft adjusting upper spring 120 and an FPC board 130; an accommodating cavity for accommodating the shaft variation submodule 2 is formed between the shaft variation submodule 1 and the base module 3; the axial variation submodule 2 respectively and coaxially ensures a space gap of X/Y/Z axial movement between the axial variation submodule 1 and the base module 3 so as to ensure the space amount of the angular tilting rotation of the axial variation submodule 2 and realize the anti-shake correction function; the shaft variation submodule 2 is elastically clamped and fixed between the shaft variation submodule 1 and the base submodule 3 through a shaft adjusting upper spring 120 at the upper end and a shaft adjusting lower spring 310 at the lower end; the front, back, left and right peripheral directions of the axis variation submodule 2 are all provided with magnets 220; an FPC board 130 is disposed on the inner peripheral side wall of the housing 110, and an axis adjusting coil 131 for driving the axis changing submodule 2 to perform anti-shake operation is disposed inside the FPC board 130 and is close to the magnet 220. Each side shaft adjusting coil 131 and each side magnet 220 are arranged oppositely to obtain an ideal driving effect; the clearance is as small as possible, and a space for the deflection of the axis variation submodule 2 needs to be reserved. Each side is provided with an axis adjusting coil 131 which is arranged in a square shape in the whole overlook. Without being limited thereto, it is also possible to dispose the axis adjusting coil 131 or dispose a plurality of axis adjusting coils 131 on a certain side; the current of each side axis adjusting coil 131 is controlled to form an inclined magnetic field, and the axis changing submodule 2 is driven to move, so that the central axis of the lens generates corresponding correction deflection. The square arrangement is adopted, the operation is simple and convenient, and the control is easy. Of course, instead of the straight magnet 220, a magnet 220 with a bent arc shape may be used; correspondingly, an arc-shaped shaft adjusting coil 131 is adopted; the electromagnetism utilization ratio is higher, and angle adjustment's thrust is bigger. A hall sensor is disposed at a central position of the axis adjusting coil 131 for sensing an offset distance between each set of magnets 220 and the FPC board 130.

As shown in fig. 4, the axis adjustment coil 131 is mounted on the flexible wiring board FPC board 130; the FPC board 130 is fixed to the inner wall of the housing 110 by adhesion. Two line ends of each side tuning coil 131 are led out to two tuning line terminals 132 under the same side FPC board 130.

As shown in fig. 7, two of the alignment terminals 132 on each side are in close contact with two of the alignment lower pads 327 on each side of the base 320. And soldering the upper and lower bonding pads at the joint of the upper and lower bonding pads, so that the upper and lower bonding pads are electrically connected.

As shown in fig. 8, the base 320 has a common axial variation lead 321, a first axial variation pin 322, a second axial variation pin 323, a third axial variation pin 324, and a fourth axial variation pin 325. Each pin is located inside the base 320 and extends out to the position corresponding to each side bonding pad, and the pins and the bonding pads are electrically conducted. And the communication between each axis-variable pin and the axis-adjusting coil end at one corresponding side is realized by welding the butt joint positions of the upper bonding pad and the lower bonding pad. When a certain amount of current is further input to each of the current-carrying terminal pins, the shaft-adjusting coils 131 on each side interact with the magnets 220 to generate electromagnetic force, so as to drive the shaft-varying submodule 2 to move towards a certain angular position.

The back of the base 320 has a plurality of conductors for electrical conduction; the conductor is made by adopting a laser etching process, and the matching precision of the conductor and the guide groove of the base 320 is higher. As shown in fig. 9, four laser etching lines extending to four sides and respectively connected to the other bonding pad end of the side of the base 320 are disposed at the bottom, and the four laser etching lines are connected in series and conducted by the laser etching line disposed at the middle portion of the ring structure. One of the four laser etching lines is communicated with the common axis variable lead 321. Similarly, by soldering the other upper and lower bonding pad joint position on one side shown in fig. 7, the other end line of the axis-adjusting coil 131 on each side is connected to four laser etching lines, and the coil current on the four sides finally flows to the common axis transformation lead 321 through the laser etching lines.

As shown in fig. 10, one side of the base 320 is further provided with an AF conducting pin 326 and an AF grounding pin 327, and the upper end surfaces of the AF conducting pin 326 and the AF grounding pin 327 are respectively in contact conduction with two corners of the tuning shaft lower spring 310.

The lower cover 260 is located between the zoom lower spring 250 and the adjustment shaft lower spring 310, and has a left conductive end foot 261 and a right conductive end foot 261 embedded and molded on one side of the inner portion thereof in an INSERT-MOLDING manner, an upper end surface of the conductive end foot 261 is in contact conduction with the zoom lower spring 250, and a lower end surface of the conductive end foot 261 is in contact conduction with the adjustment shaft lower spring 310. Further, both end lines of the zoom coil 241 wound around the circumferential side of the lens carrier 242 are weld-connected to both portions of the zoom lower spring 250, respectively. Thus, when a certain current is applied to the AF conductive pin 326 on the base 320, the current is sequentially conducted to the axis adjustment lower spring 310, the conductive end pin 261 of the lower cover 260, and the zoom lower spring 250, flows into one end of the zoom coil 241, and is finally output to the AF ground pin 327 through the other end of the zoom coil 241. Therefore, a certain amount of current is led into the AF, and the electrified zoom coil 241 and the magnet 220 interact to generate electromagnetic force, so as to drive the AF module 240 carrying the lens to drive along the Z-axis optical axis direction to realize the automatic focusing function. The AF module 240 finally stays at a position where the resultant force of the electromagnetic forces generated between the zoom coil 241 and the magnets 220 on the four sides and the resultant force of the elastic forces of the zoom upper spring 230 and the zoom lower spring 250 are in a balanced state.

The magnets 220 located on four sides can adopt a multi-pole magnetizing mode with 4 poles, and the specific magnetizing magnetic pole arrangement mode is as follows: the upper part is an N pole and an S pole from inside to outside, and the lower part is an S pole and an N pole from inside to outside. Because of adopting multi-pole magnetizing, a part of non-magnetic area is arranged between the upper and lower magnetizing areas. The magnetic pole distribution mode that two independent magnets are respectively magnetized up and down and then overlapped up and down can also be directly adopted, and the magnetic poles at the inner side and the outer side of the upper magnet and the lower magnet can refer to the magnetic pole distribution mode of the upper part and the lower part of the multi-pole magnetization. The magnetic field saturation degree of two magnets which are vertically overlapped is strong, so that large driving thrust can be obtained, but the defects of large number of parts and relatively complex assembly process exist. Not limited to the above magnetic pole arrangement, if the magnetic pole arrangement is adjusted in reverse, i.e. the upper part is adjusted from inside to outside into the S pole and the N pole, and the lower part is adjusted from inside to outside into the N pole and the S pole, then the input and output ends of the energizing current are adjusted in reverse, so that the same driving effect in the same driving direction can be obtained.

As shown in fig. 5, 6, 11 and 12, the springs are composed of an axis-adjusting upper spring 120, an axis-adjusting lower spring 310, a zoom upper spring 230 and a zoom lower spring 250.

The shaft-adjusting upper spring 120 and the shaft-adjusting lower spring 310 function to hold the fixed shaft changing submodule 2 from the upper end surface and the lower end surface, respectively. When the corresponding current is applied to the axis-adjusting coils 131 on each side, the axis-adjusting coils 131 on each side interact with the corresponding magnets 220 according to the strength of the applied current to generate the electromagnetic force in the up-down direction required by the positions on the four sides, and according to the fleming's left-hand rule, the electromagnetic force applied on each of the four sides drives the axis-changing sub-module 2 to perform axial angle deflection motion, so that the angular rotation of the axis-changing sub-module 2 finally stays at the position point when the resultant force of the electromagnetic forces generated between the axis-adjusting coils 131 on the four sides and the magnets 220 on the four sides and the resultant force of the elastic forces of the springs 120 on the axis-adjusting springs 310 under the axis-adjusting springs reach. The driving axis variation submodule 2 can be controlled to deflect to the target angle position by applying a predetermined current to the four-side axis adjustment coil 131, so as to achieve the anti-shake purpose of axial offset correction. When driving, the current direction of the oppositely arranged adjusting shaft coil 131 is opposite, so that one side driving force is upward and the other side driving force is downward; a better deflection control effect is achieved.

The axis variation submodule 2 comprises an upper cover 210, a magnet 220, a zoom upper spring 230, an AF module 240, a zoom lower spring 250 and a lower cover 260 which are arranged in sequence from top to bottom; the magnet 220 is fixed between the upper cover 210 and the lower cover 260 by a clamping groove.

The zoom up spring 230 and the zoom down spring 250 function to hold and fix the AF module from the upper end surface and the lower end surface, respectively (AF is an abbreviation of Auto Focus, and means "autofocus"). The AF module is composed of a lens carrier 242 carrying a lens and 2 sets of zoom coils 241 arranged up and down and wound around the outer circumference of the lens carrier. The two zoom coils 241 correspond to the upper and lower sub-magnets in the horizontal direction, respectively. Of course, 1 set of zoom coils may also be employed. When the corresponding current is applied to each zoom coil 241, the zoom coils 241 and the corresponding magnets 220 interact with each other to generate electromagnetic force in the Z-axis optical axis direction, and according to the fleming's left-hand rule, the AF module 240 with the lens is driven by the electromagnetic force to drive the AF module 240 in the Z-axis optical axis direction, and the AF module 240 finally stays at a position point when the resultant force of the electromagnetic forces generated between the zoom coils 241 and the four magnets 220 and the resultant force of the elastic forces of the zoom upper springs 230 and the zoom lower springs 250 reach a balanced state. The stronger the current is applied, the greater the driving force is, and the resultant force of the spring force against the driving is also increased. The driving of this AF module achieves the driving effect of normal shooting focus of the conventional VCM motor. The lower cover 260 is provided with a hall sensor for sensing the magnitude of the magnetic force generated by the zoom coil 241; the position of the lens carrier 242 is fed back.

It is understood that the AF module 240 as a part of the axis variation submodule 2 realizes an auto-focus shooting function of a mobile phone, and the axis variation submodule 2 realizes an anti-shake correction function. In order to prevent the AF module 240 and the shaft-changing sub-module 2 from interfering with each other during their respective operations, a certain space gap is also maintained between the outer peripheral surface of the AF module 240 and the upper cover 210 and the lower cover 260, which form the accommodation space of the AF module 240.

Each spring includes spring fixing ends (122, 232, 252, and 312) at four corners of an outer circumference, hanger fixing ends (123, 233, 253, and 313) at an inner circumference, and wires (121, 231, 251, and 311) between the four corners and an inner ring. The spring is positioned and fixed through the four corner fixing ends, and the driving module is clamped and supported through the inner ring fixing ends. The spring wire is bent and bent in an S shape, and the spring wire plays a role in elastic deformation and plays a role in stretching and offsetting damage of driving force to the spring body when the module is driven.

The springs are utilized to realize organic connection combination among all the products, the whole structure is compact and reasonable, and the driving and anti-shaking effects are excellent.

The assembly relationship between the spring and the adjacent components is explained as follows:

the shaft adjusting upper spring 120 is located between the housing 110 and the upper cover 210, is fixed to the housing 110 by four corner fixing points, and is fixedly connected to the upper cover 210 by a hanger fixing point, thereby clamping and supporting the upper cover 210 constituting the shaft changing submodule 2.

The shaft adjusting lower spring 310 is located between the base 320 and the lower cover 260, fixed to the base 320 by four corner fixing points, and fixedly connected to the lower cover 260 by hanging fixing points to clamp and support the lower cover 260 constituting the shaft changing submodule 2.

Zoom up spring 230 is located between upper cover 210 and the upper end surface of lens carrier 242, and is fixed to upper cover 210 by four-corner fixing points, and is also fixedly connected to the upper end surface of lens carrier 242 by hanger fixing points, so as to hold and support the upper end surface of lens carrier 242 constituting AF module 240.

The zoom lower spring 250 is located between the lower cover 260 and the lower end surface of the lens carrier 242, is fixed to the lower cover 260 by four-corner fixing points, and is fixedly connected to the lower end surface of the lens carrier 242 by a hanger fixing point to hold and support the lower end surface of the lens carrier 242 constituting the AF module 240.

And dispensing or welding the fixing points positioned at the four corners of the spring and the hanging object fixing points on the inner periphery to realize the mutual combination and fixation between the spring and the adjacent parts. Corresponding raised columns or dispensing notches can be arranged on the adjacent parts which are positioned above and below the spring corresponding to the position of the fixed point of the spring, so that the combination and fixation are more firm.

The zoom lower spring 250 and the adjusting shaft lower spring 310 are arranged in two parts which are bilaterally symmetrical and exist as two current input and output medium paths respectively, and the springs are divided into two parts which are bilaterally symmetrical, so that the connection line is simplified, the number of movable connecting wires is reduced, and the system is more reliable.

Hereinafter, the current carrying paths for driving the AF module 220 and the axis variation submodule 2 are described as follows:

current conduction path of AF module 220: AF energizing pin 326 → tuning shaft lower spring 310 → lower cover 260 (conductive terminal foot 261) → zoom lower spring 250 → zoom coil 241 → zoom lower spring 250 → lower cover 260 (other conductive terminal foot 261) → tuning shaft lower spring 310 → AF grounding pin 327

Current carrying path of axis variation submodule 2: each axis transformation pin (322, 323, 324, 325) → alignment terminal (327, 132) → alignment coil 131 → alignment terminal (327, 132) → laser engraving line of base 320 → common axis transformation pin 321.

In addition, the axial variation submodule 2 respectively and coaxially ensures the space clearance of X/Y/Z axial movement between the axial variation submodule 1 and the base module 3 so as to ensure the space amount of the angular tilting rotation of the axial variation submodule 2 and realize the anti-shake correction function. Further reference will now be made to the spatial gap case in connection with the following illustration.

As shown in fig. 13, the positional relationship among the housing 110, the shaft-adjusting spring 120, the FPC board 130, and the upper cover 210 after they are assembled with each other is revealed. As can be seen from the illustration, an X/Y axial gap S exists between the inner sidewall of the axial stator module 1 (FPC board 130) and the outer sidewall of the shaft-shift submodule 2 (top cover 210), ensuring a spatial amount of movement of the shaft-shift submodule 2 in the X-Y axial direction.

As shown in fig. 14 (a fragmentary view inverted after being cut off), the inner positional relationship of the shaft-adjusting spring 120 and the housing 110 after being assembled is revealed. It can be seen from the illustration that the four corners of the housing 110 are each provided with a housing raised step 111. The spring 120 on the adjusting shaft is flatly arranged on the raised step 111 of the shell, and is supported and firmly fixed in the shell 110 by a glue-dispensing bonding mode. It can be seen that the rest of the adjusting shaft except the contact portions of the four corners of the spring 120 and the four corners of the housing 110 are in a non-contact state, and the non-four corners have a certain space gap in the Z-axis direction.

As shown in fig. 15 (a partial cut-away view), the inner positional relationship of the shaft-adjusting upper spring 120 and the upper cover 210 after assembly is revealed. As can be seen from the illustration, the recessed portions 211 having a certain step difference are formed at the four corners of the upper cover 210 compared with the upper end surface of the main body, so that the four corners of the shaft adjusting spring 120 and the four corners of the upper cover 210 are in a non-contact state after the inner circumferential surface of the shaft adjusting spring 120 is clamped and fixed to each other, and a certain space gap is maintained between the four corners in the Z-axis direction.

As a result of combining the effects shown in fig. 14 and 15, a space gap including four corners is formed between the top inner surface (the housing 110) of the axial stator module 1 and the top end surface (the upper cover 210) of the shaft-varying submodule 2, and a space for the shaft-varying submodule 2 to move in the direction of the housing 110 in the Z-axis is secured.

As shown in fig. 16, the positional relationship of the base 320, the shaft adjusting lower spring 310, and the lower cover 260 after they are assembled with each other is revealed. As can be seen from the illustration, an X/Y axial gap S exists between the circumferential inner side wall of the base module 3 (base 320) and the outer side wall of the shaft variation submodule 2 (lower cover 260), ensuring a spatial amount of movement of the shaft variation submodule 2 in the X-Y axial direction.

As shown in fig. 17, the internal positional relationship of the shaft adjusting lower spring 310 and the base 320 after assembly is revealed. It can be seen from the illustration that the four corners of the base 320 are each provided with a base raised step 328. The lower spring 310 is disposed on the raised step 328, and is supported and fixed inside the base 320 by adhesive-dispensing. Therefore, the four corners of the shaft-adjusting lower spring 310 are in non-contact with the rest parts except the four-corner contact parts of the base 320, and the non-four-corner parts have certain space gaps in the Z-axis direction.

As shown in fig. 18, the positional relationship of the shaft adjusting lower spring 310 and the lower cover 260 after assembly is revealed. As can be seen from the figure, the four corners of the lower end surface of the lower cover 260 facing the base 320 have a recess 262 with a certain step compared with the lower end surface of the body. Accordingly, when the lower cover 260 is clamped and fixed by the inner circumferential surface of the lower shaft adjustment spring 310, the four corners of the lower shaft adjustment spring 310 and the four corners of the lower cover 260 are in a non-contact state, and a certain space gap is maintained between the four corners in the Z-axis direction.

As a result of the effect illustration in combination of fig. 17 and 18, a space gap including four corners is provided between the lower end surface (lower cover 260) of the axis-changing submodule 2 and the inner end surface (base 320) of the base module 3, and a space amount for the axis-changing submodule 2 to move in the Z-axis direction toward the base 320 is secured.

According to practical experience, the amount of the space gap between the upper, lower, front, rear, left and right is generally set to be about 0.5mm, and such a gap can obtain an effect that the inclination angle of the axis variation submodule 2 in the Z-axis direction is about 5 degrees. Compared with the conventional anti-shake motor, the anti-shake motor can obtain larger inclination angle range support, and has more excellent correction effect aiming at the problem of axial deviation of an optical axis caused by lens shake.

Further, a position sensor or the like may be provided on the lower cover 260 to accurately detect a change in the position of the movable portion (i.e., the shaft-changing submodule 2), and a suitable current level may be input to each end pin of the base 320 by a position signal feedback mechanism in which a closed loop is formed by a change in the strength of magnetic force between the position sensor and the corresponding magnet.

The operation principle of the anti-shake motor is described as follows with reference to fig. 1. During shooting, the controller obtains the focal length of the lens B from the distance measuring circuit; the controller controls the current of the zoom coil to move the AF module and change the focal length, so that the image of the shot object A is clearly displayed on the image sensor C. When the distance of the right deviation of the mobile phone caused by the shaking is the shaking distance d, the controller obtains the value of the shaking distance d from the tilt angle sensor in the mobile phone; obtaining the angle of the lens B to be deflected according to the focal length; the tangent of the deflection angle is the ratio of the jitter distance d to the focal length. The controller controls the current of each axis adjusting coil 131 to make the deflection direction of the central axis of the lens B consistent with the required deflection direction, so that the image of the shot object A is clearly displayed on the image sensor C; at this time, the image of the object a is shifted by the image correction distance e from the original shooting position; and the image has little deformation; because the deflection parameters are known, the deflection parameters can be corrected according to the existing image processing technology through the processing of a CPU or a GPU; after the corrected data are subjected to superposition denoising processing according to a conventional method, the influence caused by shaking can be removed, and a clear picture is obtained.

The above examples are only for illustrating the present invention, and besides, there are many different embodiments, which can be conceived by those skilled in the art after understanding the idea of the present invention, and therefore, they are not listed here.

Claims (7)

1. An anti-shake motor is characterized by comprising an axis variation submodule for adjusting the focal length of a lens, wherein the inner wall of the axis variation submodule is provided with an internal thread for mounting the lens; and the shaft variation submodule is sleeved outside the shaft variation submodule and is used for adjusting the deflection direction of the central shaft of the shaft variation submodule.

2. The anti-shake motor according to claim 1, wherein the shaft variation submodule includes a housing and a base, and the housing and the base are installed to form a receiving cavity of the shaft variation submodule inside; a gap is formed between the outer wall of the shaft variation submodule and the inner wall of the accommodating cavity; the outer wall of the shaft changing submodule is elastically connected with the inner wall of the accommodating cavity through a shaft adjusting spring; the front, back, left and right directions of the axis variation submodule are provided with magnets; and the corresponding positions of the shell or the base are provided with shaft adjusting coils for driving the magnets to move up and down.

3. The anti-shake motor according to claim 2, wherein the shaft adjusting spring is divided into a shaft adjusting upper spring and a shaft adjusting lower spring; the lower shaft adjusting spring is composed of two parts which are arranged in bilateral symmetry and are respectively used as conductor media to be connected with two wiring ends of the zooming coil of the shaft variation submodule.

4. The anti-shake motor according to claim 2, wherein the axis-shift submodule comprises, in order from top to bottom, an upper cover, a zoom upper spring, an AF module, a zoom lower spring, and a lower cover; the magnet is fixed between the upper cover and the lower cover, and the AF module is elastically fixed on the upper cover and the lower cover through a zooming upper spring at the upper end and a zooming lower spring at the lower end respectively; the AF module is provided with zoom coils in a circumferential direction.

5. The anti-shake motor according to claim 4, wherein the zoom coils are provided in two sets, one set above the other, corresponding to the upper and lower sub-magnets, respectively, which are horizontally disposed.

6. The anti-shake motor according to claim 4, wherein the zoom lower spring is formed in two parts symmetrically arranged left and right, and connected to the two terminals of the zoom coil as wires, respectively.

7. The anti-shake motor according to claim 4, wherein the lower cover is provided with two terminals connected to the two portions of the zoom lower spring, respectively.

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