CN112068382A - an anti-shake motor - Google Patents

Abstract

The invention discloses an anti-shake motor, which comprises an axis changing submodule for adjusting the focal length of a lens, wherein the inner wall of the axis changing 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 anti-shake motor is provided with the axis variation submodule, the zooming module is arranged as the deflectable axis variation submodule, and the inclination angle of the axis variation submodule is changed by controlling the axis adjusting coil according to the signal of the inclination angle sensor, so that the optical axis is stably aligned with a 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

an anti-shake motor

technical field

The invention relates to an anti-shake motor, which is used for anti-shake cameras of portable devices such as mobile phones and notebook computers.

Background technique

Due to various factors such as hand shake during shooting, the object to be photographed has a certain amount of offset in the X-Y axis for the center position of the optical axis of the lens, and the offset of the optical axis causes the captured image to be blurred. The image sensor size of portable devices such as mobile phones is small, and the shutter time required to obtain clear images is longer than that of professional cameras such as SLRs; stabilization is even more important.

At present, the translation-type anti-shake structure supported by suspension wires is basically used, and the length of the suspension wires is changed by using electric current, which drives the lens to move in the opposite direction along the X-Y axis, reducing the range of movement between the center of the optical axis and the subject.

SUMMARY OF THE INVENTION

The inventor found that the reason for the poor anti-shake performance of cameras of portable devices such as mobile phones is not only due to the small size of the image sensor, but also the need for a longer photosensitive time. The more main reason is: due to the small size of the lens module of the portable device and the limited offset distance, it cannot fully compensate for the amplitude of the shaking during the shooting process; the camera can only process the stage with a small shaking amplitude, which cannot be done most of the time. Compensation processing. The key point of how to realize full-cycle compensation of jitter and improve the anti-shake effect. As shown in FIG. 1 , the inventor found that due to the relatively small size of the camera, the distance between the 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 to a deflection motion, the image correction distance e generated by the deflection is much smaller than the shake distance d; obviously, the deflection distance can be greatly reduced by using the lens deflection; the full-cycle shake compensation can be achieved. Since the deflection angle is small, adjusting the deformation of the image due to the deflection basically does not constitute a burden on the graphics processing software. Therefore, the inventor has designed a novel structure, so that the camera can be deflected by a small angle in the lens module as required.

The purpose of the present invention is to provide a kind of anti-shake motor with novel and unique structure, easy to use, and can effectively improve the anti-shake performance; the specific technical scheme is:

An anti-shake motor, comprising an axis-moving sub-module for adjusting the focal length of a lens, the inner wall of the axis-moving sub-module is provided with an inner thread for installing the lens; the outside of the axis-changing sub-module is also sleeved with an adjusting-axis-moving sub-module The axis of the central axis deflection direction is changed to the stator module.

Further, the shaft changing sub-module includes a casing and a base. After the casing and the base are installed, an accommodating cavity of the shaft changing sub-module is formed inside; the outer wall of the shaft changing sub-module and the inner wall of the accommodating cavity are between A gap is set between the shaft changing sub-modules; the outer wall of the shaft changing sub-module is elastically connected with the inner wall of the accommodating cavity through the shaft adjusting spring; the front, rear, left and right directions of the shaft changing sub-module are provided with magnets; the corresponding position of the shell or base Both are provided with an axis-adjusting coil that drives the magnet to move up and down.

Further, the spring is divided into an upper spring and a lower spring; the lower spring is two parts symmetrically arranged on the left and right, which are respectively connected with two terminals of the zoom coil of the shaft shifting sub-module as wires.

Further, an upper cover, an upper zoom spring, an AF module, a lower zoom spring and a lower cover are arranged in sequence from top to bottom of the axis change sub-module; the magnet is fixed between the upper cover and the lower cover, so The AF module is elastically fixed on the upper cover and the lower cover respectively by the zoom upper spring at the upper end and the zoom lower spring at the lower end; the AF module is provided with a zoom coil in the circumferential direction.

Further, the zoom lower spring is two parts symmetrically arranged on the left and right, which are respectively connected with the two terminals of the zoom coil as wires.

Further, the lower cover is provided with two terminals respectively connected with the two parts of the lower zoom spring.

The anti-shake motor of the present invention sets up a shaft-changing stator module, sets the zoom module as a deflectable shaft-moving sub-module, and controls the shaft-adjusting coil to change the inclination of the shaft-moving sub-module according to the signal of the inclination sensor, so that the optical axis is stably aligned. subject. Due to the long distance between the center of the optical axis and the subject, the change in the rotation angle of the lens can compensate for larger shakes, greatly improving the anti-shake performance.

Description of drawings

1 is a schematic diagram of the working principle of the anti-shake motor of the present invention;

2 is a schematic diagram of the working structure of the anti-shake motor of the present invention;

Fig. 3 is a schematic diagram of the exploded structure of Fig. 2;

Figure 4 is a schematic diagram of the structure of the shaft adjustment part;

Figure 5 is a schematic diagram of the spring structure on the adjusting shaft;

Figure 6 is a schematic diagram of the structure of the lower spring for adjusting the shaft;

Figure 7 is a schematic structural diagram of a shaft variable stator sub-module;

Fig. 8 is the top view of the base structure schematic diagram;

Fig. 9 is the bottom view of base structure schematic diagram;

Figure 10 is a schematic diagram of the structure of the AF module;

11 is a schematic diagram of the structure of a zoom upper spring;

Fig. 12 is a schematic diagram of the structure of a zoom lower spring;

Figure 13 is a bottom view of the assembly of the casing, the spring on the adjusting shaft, the FPC board and the upper cover;

Figure 14 is a schematic diagram of the internal structure of the assembly of the spring on the adjusting shaft and the housing;

Figure 15 is a schematic diagram of the assembly of the spring on the adjusting shaft and the upper cover;

Figure 16 is a schematic diagram of the assembly of the base, the lower spring for adjusting the shaft, and the lower cover;

Figure 17 is a schematic diagram of the assembly of the lower spring and the base of the adjusting shaft;

Figure 18 is a bottom view of the assembly of the lower spring for adjusting the shaft and the lower cover.

In the figure: 1. Shaft-to-stator module; 110, housing; 111, raised step of housing; 120, spring on the shaft; 121, spring wire; 122, spring fixed end; 123, hanging object fixed end; 130, FPC board ; 131, adjusting axis coil; 132, adjusting axis terminal; 2, axis changing sub-module; 210, upper cover; 211, upper cover recess; 220, magnet; 230, zoom upper spring; 231, spring wire; 232, Spring fixed point; 233, hanging object fixed point; 240, AF module; 241, zoom coil; 242, lens carrier; 250, zoom lower spring; 251, spring wire; 252, spring fixed point; 253, hanging object fixed point; 260, lower cover; 261, conductive end feet; 262, recessed part of lower cover; 3, axis-changing base module; 310, lower spring for adjusting the axis; 311, spring wire; 312, spring fixing point; 313, hanging object fixing point; 320, base; 321, common axis change lead; 322, first axis change lead; 323, second axis change lead; 324, third axis change lead; 325, fourth axis change lead; 326, AF power-on pin; 327, AF ground pin; 328, base raised step; A, subject; B, lens; C, image sensor; d, shake distance; e, image correction distance; S, X/Y axis direction gap.

Detailed ways

The present invention will be more fully described below by means of 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 the relationship of one element or feature shown in the figures to another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to encompass different orientations of the device in use or operation. 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 upper and lower positions. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative references used herein interpreted accordingly.

As shown in FIG. 2 and FIG. 3 , the anti-shake motor in this embodiment includes an axis shift sub-module 2 for adjusting the focal length of the lens, and the center inner wall of the axis shift sub-module 2 is provided with the lens (not shown in the figure). The shaft changing sub-module 2 is also sleeved with the shaft changing sub-module 1 for adjusting the deflection direction of the central axis of the shaft changing sub-module, and the shaft changing sub-module 2 is used for the light generated by the shaking during the shooting process. The axial position deviation of the shaft shall be corrected accordingly. The axial deviation correction process is mainly realized by the following methods, that is, by controlling the current intensity of the axis adjustment coil 131 flowing to the FPC board 130 in the axis variable stator module 2, the adjustment coil 131 interacts with the magnet 220 in the axis variable submodule 2. An electromagnetic driving force is generated, and the driving force drives the shaft changing sub-module 2 to perform an axial angle correction movement in a certain direction.

Specifically, after the corresponding current is applied to the axis adjustment coils 131 on each side, the axis adjustment coils 131 on each side interact with the corresponding magnets 220 according to the magnitude of the applied current to generate four-sided positions. The electromagnetic force in the up and down direction is required. According to the Flaming left-hand rule, due to the electromagnetic force exerted by each of the four sides, the shaft changing sub-module 2 is driven to perform an axial angular deflection motion, and the angular rotation of the shaft changing sub-module 2 finally stays at the four-side adjustment. The point at which the resultant force of the electromagnetic force generated between the shaft coil 131 and the four-side magnets 220 and the resultant force of the elastic force of the shaft adjustment upper spring 120 and the shaft adjustment lower spring 310 reach a state of equilibrium. By supplying a predetermined current to the four-side axis adjustment coil 131 , the driving axis changing sub-module 2 can be controlled to move to the target angle position, so as to achieve the purpose of anti-shake correction of the axial offset.

The axle variable base module 3 includes a base 320 and a lower spring 310 for adjusting the axle. The shaft-changing stator module 1 includes a casing 110, a spring 120 for adjusting the shaft and an FPC board 130; an accommodation cavity for accommodating the shaft-changing sub-module 2 is formed between the shaft-changing stator module 1 and the base module 3; the shaft changing sub-module 2 A space gap for X/Y/Z axial movement is ensured between the coaxial variable stator module 1 and the base module 3 respectively, so as to ensure the amount of space for the angular tilt rotation of the axis variable submodule 2 to realize the anti-shake correction function; The changing sub-module 2 is elastically clamped and fixed between the shaft changing sub-module 1 and the base module 3 through the shaft-adjusting upper spring 120 at the upper end and the shaft-adjusting lower spring 310 at the lower end; Magnets 220 are arranged in the left and right peripheral directions; an FPC board 130 is arranged on the peripheral side of the inner peripheral side wall of the outer casing 110, and the FPC board 130 is provided with a drive shaft changing sub-module 2 close to the magnet 220 for the adjustment of the anti-shake operation. Axle coil 131 . Each side axis adjustment coil 131 and each side magnet 220 are arranged opposite to obtain an ideal driving effect; the gap is as small as possible, and a space for the deflection of the axis change sub-module 2 needs to be reserved. An axis adjustment coil 131 is provided on each side, and the overall plan view is square. Not limited to this, it is also feasible to set the axis adjustment coil 131 or multiple axis adjustment coils 131 on a certain side; by controlling the current of the axis adjustment coils 131 on each side to form a slanted magnetic field, drive the axis change sub-module 2 Movement, so that the center axis of the lens produces corresponding correction and deflection. With a square setting, it is easy to operate and easy to control. Of course, instead of the straight magnet 220 , the magnet 220 with a curved arc can be used; correspondingly, the arc-shaped adjustment coil 131 is used; the electromagnetic utilization rate is higher, and the thrust for angle adjustment is larger. A Hall sensor is disposed at the center of the axis adjustment coil 131 for sensing the offset distance between each group of magnets 220 and the FPC board 130 .

As shown in FIG. 4 , the axis adjustment coil 131 is installed on the flexible circuit board FPC board 130 ; the FPC board 130 is fixed on the inner wall of the housing 110 by pasting. The two wire ends of the axis adjustment coils 131 on each side are drawn out to the positions of the two axis adjustment terminals 132 below the FPC board 130 on the same side.

As shown in FIG. 7 , the two adjusting shaft terminals 132 on each side and the two adjusting shaft connecting lower pads 327 on each side of the base 320 are in close contact with each other. Solder paste is applied to the joints of the upper and lower pads on each side, and the upper and lower pads are electrically connected.

One side of the base 320 has a plurality of power-on pins. As shown in FIG. 8 , the base 320 has a common axis variable lead 321 , a first axis variable pin 322 , a second axis variable pin 323 , and a third axis variable pin 324 , The fourth axis changes to pin 325. The pins are inside the base 320 and are respectively extended to the positions corresponding to the side pads, and the pins and the pads are electrically connected. By welding the abutting positions of the upper and lower pads, the connection between each axis-changing pin and the end of the axis-adjusting coil on the corresponding side is realized. Further inputting a certain amount of current to each energizing terminal, each side axis adjusting coil 131 interacts with the magnet 220 to generate an electromagnetic force, which drives the axis shifting sub-module 2 to move toward a certain angular position.

The back of the base 320 has a plurality of conductors for the purpose of electrical conduction; the conductors are made by laser engraving process, and the matching precision with the guide grooves of the base 320 is higher. As shown in FIG. 9 , the bottom is provided with four laser engraving lines extending to the four sides and communicating with the other end of the pad on the side of the base 320 respectively, and the four laser engraving lines are set by setting a ring-shaped laser engraving line in the middle part. The laser engraving lines are connected in series. Among them, one of the four laser engraving lines is connected to the common axis change lead 321 . In the same way, by welding the butt joint positions of the other upper and lower pads on one side as shown in FIG. 7 , the other end lines of the axis-adjusting coils 131 on each side are connected to the four laser engraving lines, and the laser engraving lines are further connected to the end. The coil currents located on the four sides are directed to the common shaft lead 321 .

As shown in FIG. 10 , an AF conductive pin 326 and an AF grounding pin 327 are also provided on one side of the base 320 . The corners are in contact with each other for conduction.

The lower cover 260 is located between the zoom lower spring 250 and the adjustment shaft lower spring 310, and is embedded with two left and right conductive pins 261 on one side of its inner side by INSERT-MOLDING. The lower zoom spring 250 is in contact with each other, and the lower end surface of the conductive pin 261 is in contact with the lower spring 310 for adjustment. Further, the two ends of the zoom coil 241 wound around the lens carrier 242 in the circumferential direction are respectively welded and connected to the two parts of the zoom lower spring 250 . Therefore, by passing a certain current to the AF conductive pin 326 on the base 320, the current is sequentially conducted to the lower shaft adjustment spring 310, the conductive pin 261 of the lower cover 260, and the lower zoom spring 250, and flows into the zoom coil 241. One end, and finally the current is output to the AF ground pin 327 through the output of the other end of the zoom coil 241 . As a result, a certain amount of current is introduced into the AF, and the energized zoom coil 241 interacts with the magnet 220 to generate electromagnetic force, which drives the AF module 240 carrying the lens to drive along the Z-axis optical axis direction to realize the auto-focusing function. The AF module 240 finally stays at the position where the resultant force of the electromagnetic force generated between the zoom coil 241 and the four-side magnets 220 and the resultant force of the elastic force of the zoom upper spring 230 and the zoom lower spring 250 reach an equilibrium state.

The magnets 220 located on the four sides can adopt a 4-pole multi-pole magnetization method. The specific magnetization pole arrangement is as follows: the upper part is N pole and S pole from the inside out, and the lower part is S pole and N pole from the inside to the outside. . Due to the use of multi-pole magnetization, some non-magnetic areas are arranged between the upper and lower magnetization areas. It is also possible to directly use two independent magnets that are magnetized up and down and then stacked up and down. The inner and outer magnetic poles of the upper and lower magnets can refer to the upper and lower magnetic pole arrangements of multi-pole magnetization. The magnetic field saturation of the two magnets stacked on top of each other is strong, and a large driving thrust can be obtained, but there are also disadvantages of many parts and relatively complicated assembly processes. Not limited to the above-mentioned magnetic pole arrangement, if the magnetic pole arrangement is adjusted in reverse, that is, the upper part is adjusted to S pole and N pole from the inside out, and the lower part is adjusted to N pole and S pole from the inside out. If the current input and output are adjusted in reverse, the same driving effect in the same driving direction can also be obtained.

As shown in FIGS. 5 , 6 , 11 and 12 , the spring is composed of four parts: the upper spring 120 for adjusting the shaft, the lower spring 310 for adjusting the shaft, the upper zoom spring 230 and the lower zoom spring 250 .

The adjusting shaft upper spring 120 and the adjusting shaft lower spring 310 play the role of clamping the fixed shaft moving sub-module 2 from the upper end face and the lower end face, respectively. When the corresponding current is applied to the axis adjustment coils 131 on each side, the axis adjustment coils 131 on each side interact with the corresponding magnets 220 according to the magnitude of the applied current to generate the required up and down directions for the four sides. According to the law of Framing’s left hand, due to the electromagnetic force applied by each of the four sides, the shaft changing sub-module 2 is driven to make an axial angular deflection movement, and the angular rotation of the shaft changing sub-module 2 finally stays at the four-side axis adjustment coil 131. The point at which the resultant force of the electromagnetic force generated between the four-side magnets 220 and the resultant force of the elastic force of the upper spring 120 and the lower spring 310 for adjusting the shaft reaches a state of equilibrium. By supplying a predetermined current to the four-side axis adjustment coil 131 , the driving axis changing sub-module 2 can be controlled to deflect to the target angle position, so as to achieve the purpose of anti-shake correction of the axial offset. During driving, the current directions of the oppositely arranged countershaft coils 131 are opposite, so that one side driving force is upward and one side driving force is downward; better deflection control effect is achieved.

An upper cover 210, a magnet 220, an upper zoom spring 230, an AF module 240, a lower zoom spring 250, and a lower cover 260 are arranged in sequence from top to bottom of the axis shifting sub-module 2; the magnet 220 is fixed on the between the upper cover 210 and the lower cover 260 .

The upper zoom spring 230 and the lower zoom spring 250 play the role of clamping and fixing the AF module from the upper end surface and the lower end surface respectively (AF is the abbreviation of Auto Focus, which means "auto focus"). The AF module is composed of a lens carrier 242 for carrying the lens and two sets of zoom coils 241 arranged up and down around the outer periphery of the lens carrier. The two sets of zoom coils 241 correspond to the upper sub-magnet and the lower sub-magnet in the horizontal direction, respectively. Of course, one group of zoom coils can also be used. When the corresponding current is supplied to each zoom coil 241, the interaction between the zoom coil 241 and the corresponding magnet 220 generates an electromagnetic force in the direction of the Z-axis optical axis. The AF module 240 is driven in the direction of the optical axis of the Z-axis, and the AF module 240 finally stays in the zoom coil 241 and the four-side magnets 220. The position point when the phase is in equilibrium. The stronger the incoming current, the greater the driving force, and the resultant force of the spring force that relatively hinders the driving will also increase accordingly. The driving of this AF module achieves the normal driving effect of the conventional VCM motor for shooting and focusing. The lower cover 260 is provided with a Hall sensor for sensing the magnitude of the magnetic force generated by the zoom coil 241 ; and feeding back the position of the lens carrier 242 .

Therefore, it is not difficult to know that the AF module 240, as a part of the axis shift sub-module 2, realizes the auto-focus shooting function of mobile phones and the like, and the axis shift sub-module 2 realizes the function of anti-shake correction. In order to prevent the AF module 240 and the shaft shifting sub-module 2 from interfering with each other when they operate, 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 forming the accommodating space of the AF module 240 .

Each spring includes spring fixed ends (122, 232, 252 and 312) located on the outer four corners, hanging object fixed ends (123, 233, 253 and 313) located on the inner circumference, and spring wires located between the four corners and the inner ring (121, 231, 251 and 311). The positioning and fixing of the spring itself is realized through the four-corner fixed ends, and the clamping and bearing of the drive module is realized through the inner ring fixed ends. The spring wire is a curved S-shaped, elastic deformation, which stretches and offsets the damage caused by the driving force to the spring body when the module is driven.

The use of various springs realizes the organic connection and combination of various parts, the overall structure is compact and reasonable, and the driving and anti-shake effects are excellent.

The assembly relationship between the spring and the adjacent parts is described as follows:

The upper spring 120 for adjusting the shaft is located between the casing 110 and the upper cover 210, and is fixed on the casing 110 through the four corner fixing points, and is fixedly connected to the upper cover 210 through the hanging object fixing points. Carry out clamping load.

The lower spring 310 for adjusting the shaft is located between the base 320 and the lower cover 260, and is fixed on the base 320 through the four corner fixing points. Carry out clamping load.

The zoom upper spring 230 is located between the upper cover 210 and the upper end surface of the lens carrier 242 , and is fixed on the upper cover 210 through the four corner fixing points, and is fixedly connected to the upper end surface of the lens carrier 242 through the hanging object fixing points. The upper end face of the lens carrier 242 is clamped and carried.

The zoom lower spring 250 is located between the lower cover 260 and the lower end surface of the lens carrier 242 , and is fixed on the lower cover 260 through the fixed points at the four corners. The lower end face of the lens carrier 242 is clamped and carried.

Apply glue or welding to the fixed points located at the four corners of the spring and the fixed points of the hanging objects on the inner circumference to realize mutual bonding and fixing with adjacent components. Corresponding to the position of the fixed point of the spring, the adjacent parts located at the upper and lower positions of the spring can be provided with corresponding raised columns or glue dispensing notches, so that the combination and fixing are more reliable.

The lower zoom spring 250 and the lower spring 310 for adjusting the axis are arranged in two symmetrical parts, and exist as two energized medium paths for current input and output respectively. The spring is divided into two symmetrical parts to simplify the connection line and reduce the number of active connection wires. make the system more reliable.

Hereinafter, the current conduction paths for driving the AF module 220 and the axis shifting sub-module 2 are described as follows:

The current path of the AF module 220: AF power-on pin 326 → lower spring 310 for adjusting shaft → lower cover 260 (conductive pin 261) → lower zoom spring 250 → zoom coil 241 → lower zoom spring 250 → lower cover 260 (another Conductive terminal pin 261) → lower spring 310 for adjusting shaft → AF ground pin 327

The current path of the axis change sub-module 2: each axis change pin (322, 323, 324, 325) → axis adjustment terminals (327, 132) → axis adjustment coil 131 → axis adjustment terminals (327, 132) → The laser engraving circuit of the base 320 → the common axis becomes the lead 321.

In addition, a space gap for X/Y/Z axial movement is ensured between the coaxial variable stator module 1 and the base module 3, respectively, to ensure the amount of space for the angular tilt rotation of the shaft variable submodule 2 to prevent Shake correction function. Now further for the space gap situation, combined with the following diagrams for related descriptions.

As shown in FIG. 13 , the positional relationship between the housing 110 , the spring 120 on the adjusting shaft, the FPC board 130 and the upper cover 210 after being assembled with each other is disclosed. It can be seen from the figure that there is an X/Y axial gap S between the inner side wall (FPC board 130 ) of the axial stator module 1 and the outer side wall (upper cover 210 ) of the shaft variable sub-module 2, which ensures that the shaft variable The amount of space for module 2 to move in the X-Y axis.

As shown in FIG. 14 (a partial view that is cut and inverted), the internal positional relationship between the spring 120 on the adjusting shaft and the housing 110 after being assembled is revealed. It can be seen from the figure that each of the four corners of the casing 110 is provided with a casing protruding step 111 . The spring 120 on the adjusting shaft is flat on the protruding step 111 of the casing, and is supported and firmly fixed inside the casing 110 by means of glue dispensing. From this, it can be concluded that the rest of the four corners of the spring 120 on the adjusting shaft and the four corners of the housing 110 are not in contact with each other, and the parts at the non-four corners have a certain space gap in the Z-axis direction.

As shown in FIG. 15 (a partial view after being cut off), the internal positional relationship between the upper spring 120 of the adjusting shaft and the upper cover 210 after being assembled is revealed. It can be seen from the figure that the four corners of the upper cover 210 have recesses 211 with a certain step difference compared with the upper end surface of the main body. Therefore, after the inner ring surface of the upper spring 120 for the adjustment shaft is clamped and fixed to the upper cover 210, the adjustment shaft can be adjusted. The four corners of the upper spring 120 and the four corners of the upper cover 210 are in non-contact with each other, and a certain space gap is maintained with each other in the Z-axis direction at the four corners.

14 and 15, there is a space gap including the four corners between the top inner surface (the housing 110) of the axial stator module 1 and the top surface (the upper cover 210) of the shaft moving sub-module 2, including the four corners to ensure that The amount of space for the axis shifting sub-module 2 to move in the direction of the Z axis toward the housing 110 is determined.

As shown in FIG. 16 , the positional relationship between the base 320 , the lower spring 310 for adjusting the shaft, and the lower cover 260 after being assembled with each other is disclosed. It can be seen from the figure that there is an X/Y axial gap S between the circumferential inner side wall (base 320 ) of the base module 3 and the outer side wall (lower cover 260 ) of the shaft movement sub-module 2 , which ensures that the shaft movement sub-module 2 The amount of space to move in the X-Y axis.

As shown in FIG. 17 , the internal positional relationship between the lower spring 310 for adjusting the shaft and the base 320 after being assembled is revealed. It can be seen from the figure that each of the four corners of the base 320 is provided with a base protruding step 328 . The lower spring 310 for adjusting the shaft is placed flat on the protruding step 328 of the base, and is supported and firmly fixed inside the base 320 by means of glue dispensing. From this, it can be concluded that the rest of the four corners of the lower spring 310 and the four corners of the base 320 are in non-contact with each other, and the parts at the non-four corners maintain a certain space gap in the Z-axis direction.

As shown in FIG. 18 , the positional relationship between the shaft adjusting lower spring 310 and the lower cover 260 after being assembled is revealed. It can be seen from the figure that the four corners of the lower end surface of the lower cover 260 in the direction of the base 320 and the lower end surface of the main body have concave parts 262 with a certain level difference. Therefore, after the inner ring surface of the lower shaft adjustment spring 310 is clamped and fixed to the lower cover 260, the four corners of the lower shaft adjustment spring 310 and the four corners of the lower cover 260 are non-contact with each other, and the Z-axis directions of the four corners are kept mutually. a certain space gap.

17 and 18, there is a space gap including the four corners between the lower end face (lower cover 260) of the shaft movement sub-module 2 and the inner end face (the base 320) of the base module 3, which ensures the shaft movement The amount of space for the sub-module 2 to move toward the base 320 in the Z-axis.

According to practical experience, the space gap between up, down, front, back, left, and right is generally set at 0.5mm. Such a gap can obtain the effect that the inclination angle of the axis change sub-module 2 in the Z-axis direction is about 5 degrees. Compared with the conventional anti-shake motor, it can obtain a wider range of tilt angle support, and the correction effect is more outstanding for the axial deviation of the optical axis caused by the lens shake.

Further, a position sensor can be arranged on the lower cover 260 to accurately detect the position change of the movable part (ie, the axis change sub-module 2 ), and the position of the closed loop is formed by the change of the magnetic strength between the position sensor and the corresponding magnet. The signal feedback mechanism is used to input a suitable current size to each terminal of the base 320 .

With reference to Figure 1, the working principle of the anti-shake motor is described as follows. When shooting, the controller obtains the focal length of the lens B from the ranging 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 subject A is clearly displayed on the image sensor C. When the distance that the mobile phone shifts to the right due to shaking is the shaking distance d, the controller obtains the value of the shaking distance d from the tilt sensor in the mobile phone; according to the focal length, the angle that the lens B should be deflected is obtained; the tangent of the deflection angle is the shaking distance d and the ratio of focal lengths. The controller controls the current of each axis adjustment coil 131 so that the deflection direction of the central axis of the lens B is consistent with the required deflection direction, so that the image of the subject A is clearly displayed on the image sensor C; at this time, the image of the subject A is Although there is an offset of the image correction distance e relative to the original shooting position; and the image is slightly deformed; since the deflection parameters are known, it can be corrected according to the existing image processing technology after processing by the CPU or GPU; After the conventional method superimposes denoising processing, the influence caused by jitter can be removed, and a clear picture can be obtained.

The above examples are only used to illustrate the present invention. In addition, there are many different implementations, and these implementations can be thought of by those skilled in the art after comprehending the idea of the present invention. Therefore, they are not repeated here. an enumeration.

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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