WO2023173456A1 - 一种防抖相机模组 - Google Patents
一种防抖相机模组 Download PDFInfo
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- WO2023173456A1 WO2023173456A1 PCT/CN2022/082402 CN2022082402W WO2023173456A1 WO 2023173456 A1 WO2023173456 A1 WO 2023173456A1 CN 2022082402 W CN2022082402 W CN 2022082402W WO 2023173456 A1 WO2023173456 A1 WO 2023173456A1
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- WO
- WIPO (PCT)
- Prior art keywords
- camera module
- ball seat
- module according
- circuit board
- elastic
- Prior art date
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- 238000011105 stabilization Methods 0.000 title abstract 5
- 230000003287 optical effect Effects 0.000 claims description 29
- 230000002093 peripheral effect Effects 0.000 claims description 27
- 238000009434 installation Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000013016 damping Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001739 rebound effect Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
- G02B27/648—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake for automatically maintaining a reference alignment, e.g. in self-levelling surveying instruments
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/68—Control of cameras or camera modules for stable pick-up of the scene, e.g. compensating for camera body vibrations
- H04N23/682—Vibration or motion blur correction
- H04N23/685—Vibration or motion blur correction performed by mechanical compensation
- H04N23/687—Vibration or motion blur correction performed by mechanical compensation by shifting the lens or sensor position
Definitions
- This application relates to an anti-shake camera module.
- the photos or videos taken may be blurred and affect the image quality.
- the vibration is relatively strong or the shooting light is weak, The above-mentioned adverse effects will be exacerbated.
- mechanical anti-shake methods are more effective in compensating for external vibrations.
- mechanical anti-shake uses an anti-shake actuator to translate and/or rotate the lens and image sensor to achieve the anti-shake effect.
- the ball-type anti-shake camera module (reference document CN111664324A) can achieve multi-axis rotational freedom, and due to its high displacement spring coefficient, different posture differences and changes in the direction of geocentric suction have an impact on the anti-shake performance. Low and widely used.
- the outer seat body and the inner seat body are rotationally connected through a set of balls, and two of the balls are located above the rotation center, and the other two balls are located below the rotation center.
- interference will inevitably occur.
- the angle between the section of the inner base body that is in contact with the balls and the optical axis of the lens is large, it will cause greater assembly difficulty, resulting in Unable to be mass produced.
- One purpose of this application is to provide an anti-shake camera module that can not only provide multi-axis degrees of freedom and reduce the impact of posture differences on anti-shake performance, but also can effectively reduce the difficulty of assembly and facilitate mass production.
- An anti-shake camera module including:
- the fixed structure includes at least two separate outer ball seats, the at least two outer ball seats are connected and jointly define a through hole, each of the outer ball seats has a rotation fulcrum, and the rotation The total number of fulcrums is at least four and located within the opening;
- a first circuit board the first circuit board has a fixed part, an elastic part and a connecting part connected in sequence, and the fixed part is connected to the fixed structure;
- connection structure includes a plurality of balls consistent with the number of the rotation fulcrums, and the plurality of balls are rotationally connected to each of the rotation fulcrums in one-to-one correspondence;
- a movable structure is installed in the through opening, and the bottom of the movable structure is connected to the connecting part.
- the movable structure includes an inner ball seat and a ball seat installed on the inner ball seat.
- Lens, the outer periphery of the inner ball seat is provided with at least four spherical segments corresponding to each of the balls, the spherical centers of each of the spherical segments coincide with the center of rotation, and the balls are in contact with the spherical segments. ;as well as
- a driving structure capable of driving the movable structure to rotate around at least two rotation axes.
- the fixed structure includes two outer ball seats stacked up and down.
- Each of the outer ball seats has an upper and lower penetrating opening, and the two openings are connected to define the entire outer ball seat.
- the through opening is provided with at least two rotation fulcrums on each of the outer ball seats;
- a plane passing through the rotation center and perpendicular to the optical axis of the lens is defined as the first reference plane, and the rotation fulcrums on the outer ball seat located above are located above the first reference plane, and are located above the first reference plane.
- the rotation fulcrums on the lower outer ball seats are all located below the first reference plane.
- each of the spherical segments are the same, each of the outer ball seats is provided with two rotational fulcrums, and the cross section of each of the spherical segments at the position where it contacts the ball is equal to The angles between the optical axes of the lenses are equal;
- the two rotation fulcrums and the rotation center on the outer ball seat located above are located on the first reference straight line, and the two rotation fulcrums and the rotation center on the outer ball seat located below The centers are all located on the second reference straight line;
- the first reference straight line is perpendicular to the second reference straight line.
- each of the outer ball seats includes:
- the opening is opened on the base
- the clamping part is connected to the opening of the base, the clamping part has a groove, the ball is arranged in the groove, and the rotation fulcrum defines on the inner wall of the groove;
- two of the bases are stacked one above the other.
- At least one clamping part is configured as:
- An elastic arm is suspended in the opening, one end of the elastic arm is connected to the base, and the other end of the elastic arm is connected to the clamping part, and satisfies the relationship: L ⁇ 4t; where, L is the length of the elastic arm, and t is the thickness of the elastic arm.
- At least one of the outer ball seats is provided with a limiter, and the outer circumference of the inner ball seat is provided with a notch.
- the limiter cooperates with the notch to limit the movable The angle of rotation of the structure relative to the fixed structure.
- the driving structure includes at least two groups of actuators, and the at least two groups of actuators are circumferentially spaced along the outer periphery of the inner ball seat;
- the actuator includes a coil and a magnet arranged oppositely, and the coil and the magnet are respectively arranged on the inner peripheral wall of the through port and the outer peripheral wall of the inner ball seat.
- the magnet is provided on the inner peripheral wall of the through opening, and the coil is provided on the outer peripheral wall of the inner ball seat.
- the magnets in each group of actuators, the magnets all cover the coils, and the outer edges of the magnets protrude from the outer edges of the coils.
- At least one of the actuators further includes a metal sheet, the metal sheet is disposed on the outer peripheral wall of the inner ball seat, and the metal sheet is disposed on the outer periphery of the coil and/or Inner week.
- the movable structure further includes:
- a second circuit board the second circuit board is connected to the bottom of the lens, and the bottom surface of the second circuit board is mechanically and electrically connected to the connecting portion.
- the top surface of the second circuit board is provided with There is an image sensor.
- the lens includes:
- An optical unit is provided through the inner periphery of the lens holder, and the image sensor is arranged opposite to the optical unit.
- the movable structure further includes:
- a third circuit board is installed on the outer periphery of the inner ball seat and is electrically connected to the second circuit board.
- the third circuit board is provided with a position sensor and/or an inertial measurement unit. .
- the third circuit board includes:
- a surrounding frame overlaps the top surface of the inner ball seat
- a plurality of extension arms are circumferentially spaced on the outer periphery of the inner ball seat.
- the upper ends of the extension arms are connected to the surrounding frame. The positions are provided on the outside of each extension arm. sensor.
- the outer peripheral wall of the inner ball seat is provided with a plurality of slots corresponding to each of the extension arms one by one, and the top of the slot penetrates the top surface of the inner ball seat.
- the extension arm is received in the slot.
- the third circuit board further includes:
- the downward extension plate, the downward extension plate and each of the extension arms are staggered in the circumferential direction, the downward extension plate includes side plates and end plates connected in sequence, the top side of the side plates is connected to the surrounding frame, One side of the end plate is connected to the bottom side of the side plate and extends along the radial direction of the lens.
- the side plate is attached to the outer peripheral wall of the inner ball seat.
- the end plate is attached to It is provided on the bottom surface of the second circuit board, and the inertial measurement unit is provided on the outside of the side plate.
- the fixed structure further includes:
- a housing with an installation cavity inside the housing, a through hole connected to the installation cavity on the top of the housing, and the at least two outer ball seats and the first circuit board are installed in the installation cavity of the housing. Inside, the top of the lens is inserted into the opening.
- the housing includes:
- An upper housing, the upper housing is covered on the top of the upper housing, and the installation cavity is defined between the upper housing and the lower housing;
- the fixing part is partially sandwiched between the upper housing and the lower housing.
- the fixing portion partially protrudes from the outside of the housing, and a plug connector is provided in the outer area of the fixing portion that protrudes from the housing.
- the elastic part includes:
- each elastic wire is located on the second reference plane, one end of the elastic wire is connected to the fixed part, and the other end of the elastic wire is connected to the connecting part, the elastic wire includes at least Two connecting sections connected by bends in sequence.
- the second reference plane is perpendicular to the optical axis of the lens.
- the at least two spaced elastic filaments are symmetrically distributed on both sides of the connecting part
- the second reference plane is perpendicular to the optical axis of the lens.
- the elastic part includes:
- the elastic plate includes a first plate body and a second plate body connected in sequence.
- the first The plate surface of the plate body is parallel to the optical axis of the lens
- the plate surface of the second plate body is perpendicular to the optical axis
- one side of the first plate body is connected to the fixing part
- the first plate body The other side of the body is connected to one side of the second plate body, the other side of the second plate body is connected to the connecting part, and the second plate body is provided in the passage.
- the first plate body includes two wall surfaces connected in sequence, and the two wall surfaces are vertical. In some embodiments of this application,
- the fixed structure and the movable structure are rotationally connected through a first circuit board including an elastic part and at least four balls.
- the movable structure Under the action of the driving structure, the movable structure can undergo multiple changes relative to the fixed structure.
- the axis rotates, and different posture differences have a low impact on the anti-shake performance;
- the fixed structure in this application is provided with at least two separate outer ball seats, and each outer ball seat has a rotation fulcrum connecting the balls.
- each outer ball seat is first installed on the outer periphery of the movable structure through balls, and then assembled with other components, which can effectively reduce the difficulty of assembly and achieve mass production of the product.
- Figure 1 is a schematic structural diagram of an anti-shake camera module according to some embodiments of the present application.
- Figure 2 is an explosion diagram of Figure 1;
- Figure 3 is a top view of an anti-shake camera module according to some embodiments of the present application.
- Figure 4 is a cross-sectional view along line A-A of Figure 3;
- Figure 5 is a B-B cross-sectional view of Figure 3;
- Figure 6 is a C-C cross-sectional view of Figure 3;
- Figure 7 is a D-D cross-sectional view of Figure 3.
- Figure 8 is an exploded schematic diagram of the relationship between the outer ball seat and the magnet in Figure 1;
- Figure 9 is an exploded schematic diagram of the relationship between the inner ball seat, the third circuit board and the coil in Figure 1;
- Figure 10 is a schematic structural diagram of the first circuit board in Figure 1;
- Figure 11 is an exploded schematic diagram of an anti-shake camera module according to some embodiments of the present application.
- Figure 12 is a schematic assembly diagram of the outer ball seat and the inner ball seat in the anti-shake camera module according to some embodiments of the present application;
- Figure 13 is a schematic assembly diagram of the outer ball seat and the inner ball seat in the anti-shake camera module of some embodiments of the present application;
- Figure 14 is a schematic structural diagram of an anti-shake camera module according to some embodiments of the present application.
- Figure 15 is a schematic structural diagram of the first circuit board in Figure 14;
- First circuit board 210. Fixed part; 211. Plug connector; 220. Elastic part; 221. Elastic wire; 2211. Connection section; 222. Elastic plate; 2221. First plate body; 2221a, wall surface; 2222. second plate body; 230, connection part;
- Driving structure 410. Actuator; 411. Coil; 412. Magnet; 413. Metal sheet;
- X the first reference straight line
- Y the second reference straight line
- Z the optical axis of the lens
- a the reference sphere.
- first, second, etc. are used herein to describe various information, but this information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other.
- first information may also be called “second” information
- second information may also be called “first” information.
- an embodiment of the present application proposes an anti-shake camera module, which includes: a fixed structure 100 , a first circuit board 200 , a connection structure 300 , a movable structure 500 and a driving structure 400 .
- the fixed structure 100 includes two outer ball seats 110.
- the two outer ball seats 110 are not integrally formed. That is, the two outer ball seats 110 are split as a whole and can be disassembled from each other.
- the two outer ball seats 110 are stacked up and down and connected.
- Each outer ball seat 110 has an opening 1121 that runs through the upper and lower parts.
- the two openings 1121 are connected and defined as a through hole 120 that runs through the upper and lower parts.
- Each outer ball seat 110 has two rotational fulcrums 111, that is, the total number of rotational fulcrums 111 is four.
- the first circuit board 200 has a fixed part 210, an elastic part 220 and a connecting part 230 connected in sequence, and the fixed part 210 is connected to the fixed structure 100;
- the connecting structure 300 includes four one-to-one corresponding rotations Balls 310 are connected to each rotation fulcrum 111;
- the movable structure 500 is inserted into the through hole 120, and the bottom of the movable structure 500 is connected to the connecting part 230.
- the movable structure 500 includes an inner ball seat 510 and is installed on the inner ball seat 510.
- the lens 520 has at least four spherical segments 511 corresponding to each ball 310 on the outer periphery of the inner ball seat 510.
- each spherical segment 511 are coincident with the rotation center, and the rotation center passes through the optical axis Z of the lens 520.
- the ball 310 is in contact with the spherical segment 511; the driving structure 400 can drive the movable structure 500 to rotate around at least two rotation axes, and each rotation axis passes or approximately passes through the rotation center.
- the driving structure 400 drives the movable structure 500 to rotate relative to the fixed structure 100, and when the rotation is opposite to the external vibration direction and has the same amplitude, the external vibration can be offset.
- four balls 310 are arranged between the two outer ball seats 110 and the inner ball seat 510, and the four balls 310 respectively correspond to the four concentric spherical segments 511 on the inner ball seat 510.
- multi-axis rotation anti-shake can be achieved (specifically, the direction of the rotation axis is determined according to the direction of the driving force that the driving structure 400 can exert on the movable structure 500), and the four balls 310 can achieve stable and reliable rotation of the movable structure 500.
- the first circuit board 200 is an elastic circuit board, connecting the bottom of the movable structure 500 and the fixed structure 100. It can achieve a damping effect during the anti-shake movement, and after the anti-shake is completed
- the automatic rebound reset of the movable structure 500 can be realized; in addition, since it includes two split outer ball seats 110, the two outer ball seats 110 are respectively provided with two rotational fulcrums 111 that are rotationally connected with the balls 310.
- the two outer ball seats 110 can be connected to the outer periphery of the inner ball seat 510 through the balls 310 in a top-to-bottom or bottom-to-top manner. The assembly is simple and facilitates mass production of the product.
- the above-mentioned through-hole 120 can be configured to penetrate left and right or in other oblique penetrating forms, which is not limited in this application.
- the movable structure The 500 is less affected by attitude differences when realizing multi-axis anti-shake rotation.
- the plane passing through the rotation center and perpendicular to the optical axis Z of the lens 520 is defined as the first reference plane.
- the rotation fulcrum 111 on the outer ball seat 110 located above is evenly spaced.
- the rotation fulcrum 111 on the outer ball seat 110 located above the first reference plane and located below is both located below the first reference plane.
- each spherical segment 511 are set to be equal, that is, each spherical segment 511 is on the same reference spherical surface a;
- the angle ⁇ (not specifically marked in the drawing) between the cut surface and the optical axis Z of the lens 520 is equal to
- the two rotational fulcrums 111 and the rotational center are both located on the first reference straight line X is perpendicular to the second reference straight line Y. Based on this structure, when ⁇ is large, the assembly difficulty can be effectively reduced and a stable multi-axis anti-shake effect can be achieved.
- each spherical segment 511 can also be set to be unequal, that is, as long as the spherical centers of each spherical segment 511 are ensured to coincide.
- the overall shape is a rectangle, and the four balls 310 are respectively located at the four corners of the rectangle.
- each outer ball seat 110 includes: a base 112 and two clamping parts 113.
- the opening 1121 is opened on the base 112, and the clamping parts 113 is connected to the opening 1121 of the base 112, and each clamping part 113 is provided with a rotation fulcrum 111; and the two bases 112 are stacked up and down, and the balls 310 are provided in each clamping part 113 and the inner ball seat 510 between.
- a groove 1131 is opened on the clamping part 113, the ball 310 is provided in the groove 1131, and the rotation fulcrum 111 is limited to on the inner wall of groove 1131.
- At least one clamping portion 113 of the two outer ball seats 110 is configured to be suspended in the opening 1121 through an elastic arm 114, and one end of the elastic arm 114 is connected to The other end of the base 112 and the elastic arm 114 is connected to the clamping part 113.
- the elastic arm 114 is disposed on the first reference plane and extends along the radial direction of the reference spherical surface a.
- the elastic arm 114 satisfies the relational expression: L ⁇ 4t; where L is the extension length of the elastic arm 114, t is the thickness of the elastic arm 114; the radial elastic coefficient of the elastic arm 114 that satisfies the above relationship is low, so that the part tolerance and assembly tolerance have a negative impact on the ball.
- the impact of normal force and friction on 310 is low, which can reduce part processing tolerances and assembly tolerances, thereby reducing production difficulty, reducing production costs, and improving production yield.
- At least one outer ball seat 110 is provided with a limiter 115
- the inner ball seat 510 is provided with a notch 512 on its outer periphery.
- the limiter 115 cooperates with the notch 512 to limit the position. , can limit the rotation angle of the movable structure 500 relative to the fixed structure 100; by setting the limiter 115 on the outer ball seat 110, it can mechanically limit the position with the notch 512 on the inner ball seat 510 to avoid shaking during anti-shake movement or falling. , the moving parts rotate excessively, affecting the reliability of the product.
- FIG. 12 shows an embodiment in which a limiting piece 115 is provided on only one of the outer ball seats 110
- FIG. 13 shows an embodiment in which limiting pieces 115 are respectively provided on the two outer ball seats 110 .
- the driving structure 400 includes at least two groups of actuators 410, and the at least two groups of actuators 410 are circumferentially spaced along the outer circumference of the inner ball seat 510; the actuators 410 include opposite arrangements.
- the coil 411 and the magnet 412 are respectively arranged on the inner peripheral wall of the through hole 120 and the outer peripheral wall of the inner ball seat 510 (specifically, there are two arrangement forms.
- the first one is to arrange the coil 411 on the through hole 120 On the inner peripheral wall of the inner ball seat 510, the magnet 412 is arranged on the outer peripheral wall of the inner ball seat 510; in another method, the coil 411 is arranged on the outer peripheral wall of the inner ball seat 510, and the magnet 412 is arranged on the inner peripheral wall of the through opening 120) .
- the electromagnetic force exerted on the movable structure 500 can be changed, thereby causing the movable structure 500 to rotate.
- the rotation is opposite to the external vibration direction and the amplitude is close, then Achieve effective anti-shake.
- each group of actuators 410 can respectively control the movable structure 500 to rotate anti-shake around a rotation axis, and the specific direction of the rotation axis is related to the arrangement orientation of the coil 411; the number of groups of actuators 410 is based on specific needs. The degree of freedom of the anti-shake rotation to select the setting.
- two groups of actuators 410 are provided, that is, the movable structure 500 has two degrees of rotational freedom.
- three groups of actuators are provided.
- the movable structure 500 has three axes of rotational freedom.
- the magnet 412 is provided on the inner peripheral wall of the through hole 120, and the coil 411 is provided on the outer peripheral wall of the inner ball seat 510, and in each group of actuators 410, the magnet 412 completely covers the coil 411, and the outer edges of the magnet 412 protrude from the outer edge of the coil 411.
- the upper and lower ends of the magnet 412 exceed the upper and lower sides of the coil 411 respectively; during the anti-shake movement, the coil 411 can use the assembly space more effectively in areas with strong magnetic fields and improve the magnetic force, thus making the overall product structure more compact, improving the anti-shake angle and reducing power consumption.
- fixing the magnet 412 on the fixed structure 100 can effectively reduce the magnetic interference effect of the nearby magnet 412 on the anti-shake camera module, so as to avoid affecting the anti-shake effect.
- the three actuators 410 each further include a metal sheet 413.
- the metal sheet 413 is provided on the outer peripheral wall of the inner ball seat 510, and the coil 411 is located between the metal sheet 413 and the magnet 412.
- the metal piece 413 will rotate relative to the magnet 412, thereby generating a counter electromotive force and an electromagnetic force opposite to the anti-shake movement, which can effectively increase the damping effect in the control system and improve the high-frequency anti-shake effect; in addition, when the electronic system fails due to de-energization, the damping effect still exists, which can effectively reduce unnecessary movement and noise of the movable structure 500 caused by external vibrations when de-energization.
- the metal sheet 413 in the above embodiment can be disposed on the outer peripheral wall of the inner ball seat 510 at the outer peripheral position of the coil 411, that is, the actuator 410 includes: coils arranged oppositely from the inside to the outside. 411, metal piece 413, magnet 412.
- metal pieces 413 can also be provided on the inner and outer sides of each coil 411 respectively.
- the metal sheet 413 can be provided in only part of the actuator 410, and the above effect can also be achieved.
- actuating devices can also be provided in the movable structure 500 to drive the lens 520 to move along the optical axis to achieve the autofocus function.
- a shape memory alloy motor is used to drive the lens. 520.
- the movable structure 500 also includes: a second circuit board 530; the second circuit board 530 is connected to the bottom of the lens 520, and the bottom surface of the second circuit board 530 and the connecting portion 230 are mechanically connected. And electrical connection, the top surface of the second circuit board 530 is provided with an image sensor 531; the first circuit board 200 can be electrically connected to other external control boards (for example: the motherboard in a small mobile device with a shooting function), so that the external The control board communicates with the image sensor 531 through the first circuit board 200 and obtains the influence information.
- external control boards for example: the motherboard in a small mobile device with a shooting function
- the lens 520 includes: a lens holder 521 and an optical unit 522.
- the lens holder 521 is connected to the inner periphery of the inner ball seat 510.
- the optical unit 522 is threaded through the inner periphery of the lens holder 521. That is, the optical unit 522 passes through
- the lens mount 521 is connected to the inner ball mount 510, and the image sensor 531 and the optical unit 522 are arranged oppositely.
- the movable structure 500 further includes: a third circuit board 540.
- the third circuit board 540 is installed on the outer periphery of the inner ball seat 510 and is electrically connected to the second circuit board 530.
- the circuit board 540 is provided with a position sensor 541 and/or an inertial measurement unit 542; by reading the information on the position sensor 541, closed-loop anti-shake control can be achieved to achieve a better anti-shake effect.
- the position information is used to control the on-off and size of the current on each coil 411; in addition, by reading the data on the inertial measurement unit 542 that moves together with the image sensor 531, an additional electronic anti-shake can be added to achieve a better anti-shake effect. .
- the third circuit board 540 includes: a surrounding frame 543, a lower extension plate 545 and a plurality of extending arms 544; the surrounding frame 543 overlaps On the top surface of the inner ball seat 510, a plurality of extension arms 544 are circumferentially spaced on the outer periphery of the inner ball seat 510. The upper ends of the extension arms 544 are connected to the surrounding frame 543. Position sensors 541 are provided on the outside of each extension arm 544. , the lower extension plate 545 and each extension arm 544 are staggered in the circumferential direction.
- the lower extension plate 545 includes a side plate 5451 and an end plate 5452 connected in sequence.
- the top side of the side plate 5451 is connected to the surrounding frame 543, and one side of the end plate 5452
- the side plate 5451 is connected to the bottom side of the side plate 5451 and extends inward along the radial direction of the lens 520.
- the side plate 5451 is attached to the outer peripheral wall of the inner ball seat 510, and the end plate 5452 is attached to the bottom surface of the second circuit board 530.
- An inertial measurement unit 542 is provided on the outside of the side plate 5451.
- each coil 411 is disposed on the outer periphery of the position sensor 541 in a corresponding ring, that is, the position sensor 541 is disposed at the middle position of the coil 411 .
- the outer peripheral wall of the inner ball seat 510 is provided with a plurality of slots 513 that are opposite to each extension arm 544 one by one.
- the top of the slot 513 runs through the inner ball seat.
- the extension arm 544 is received in the slot 513.
- the fixed structure 100 also includes: a shell 130.
- the shell 130 has an installation cavity 131 in it.
- the top of the shell 130 is provided with a through hole 132 connected to the installation cavity 131.
- the circuit board 200 is installed in the installation cavity 131 of the housing 130, and the top of the lens 520 is inserted into the through hole 132; the housing 130 can effectively protect various components located in the installation cavity 131.
- the housing 130 includes two housings, which are: a lower housing 133 and an upper housing 134.
- the upper housing 134 is covered on the top of the lower housing 133, and the installation cavity 131 is defined in the upper housing. between the body 134 and the lower housing 133; wherein, the fixing portion 210 is partially sandwiched between the upper housing 134 and the lower housing 133.
- the upper housing 134 and the lower housing 133 are connected by glue dispensing or welding.
- the fixing part 210 partially extends out of the outer shell 130 , and a plug connector 211 is provided in the outer area of the fixing part 210 extending out of the outer shell 130 .
- the elastic part 220 includes: at least two elastic wires 221.
- the at least two elastic wires 221 are both located in the installation cavity 131, and each elastic wire 221 is located on the second reference plane.
- One end of the elastic wire 221 is connected to the fixing part 210, and the other end of the elastic wire 221 is connected to the connecting part 230.
- the elastic wire 221 includes at least two connecting sections 2211 connected in a bent manner.
- At least two spaced apart elastic wires 221 are symmetrically distributed on both sides of the connecting part 230 ; wherein, the second reference plane Perpendicular to the optical axis Z of the lens 520 .
- a passage 135 is defined between the upper housing 134 and the lower housing 133 .
- the passage 135 is located outside the housing 130 and connected to the installation cavity 131 ;
- the elastic portion 220 It includes: an elastic plate 222, one end of the elastic plate 222 is connected to the fixed part 210, and the other end of the elastic plate 222 is connected to the connecting part 230.
- the elastic plate 222 includes a first plate body 2221 and a second plate body 2222 connected in sequence.
- the plate surface of the body 2221 is parallel to the optical axis Z of the lens 520, the plate surface of the second plate body 2222 is perpendicular to the optical axis Z, one side of the first plate body 2221 is connected to the fixing part 210, and the other side of the first plate body 2221 is connected to the fixing part 210.
- One side of the second plate body 2222 is connected, and the other side of the second plate body 2222 is connected to the connecting portion 230 .
- the second plate body 2222 is disposed in the passage 135 .
- the structure of this product is simpler and the space utilization rate is higher, which can effectively reduce the volume of the entire product and also ensure better damping and rebound effects.
- the first plate body 2221 includes two wall surfaces 2221a connected in sequence, and the two wall surfaces 2221a vertical.
- the housing 130 may be configured in other forms, such as an integrated structure, two or more housings stacked one above the other, two or more housings covering the left and right sides, etc. In this application, There are no restrictions in it.
- more than four balls 310 can be provided between the movable structure 500 and the fixed structure 100 , that is, three or more balls 310 are connected to at least one outer ball seat 110 .
- at least four balls 310 are required, which not only achieves a stable connection between the movable structure 500 and the fixed structure 100, but also simplifies the structure.
- each outer ball seat 110 has a bayonet on one side, and each ball seat 310 is connected end to end. Each bayonet is connected to the above-mentioned through port 120.
- each outer ball seat 110 is connected sequentially along the circumferential direction. , thereby connecting the movable structure 500 to each outer ball seat 110 through the rotation of the balls 310 .
- the fixed structure 100 and the movable structure 500 are rotationally connected through the first circuit board 200 including the elastic part 220 and at least four balls 310.
- the movable structure 500 can perform multi-axis rotation relative to the fixed structure 100, and different posture differences have a low impact on the anti-shake performance;
- the fixed structure 100 in this application is provided with at least two separate outer ball seats 110 , and each outer ball seat 110 has a rotation fulcrum 111 connecting the balls 310.
- each outer ball seat 110 is installed on the outer periphery of the movable structure 500 through the balls 310, and then is assembled with other components, so that It can effectively reduce the difficulty of assembly and achieve mass production of products.
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Abstract
本申请公开了一种防抖相机模组,包括:固定结构,包括呈分体的至少两个外滚珠座,各外滚珠座上均具有转动支点,转动支点的总数至少为四个;第一电路板,具有依次连接的固定部、弹性部及连接部,固定部与固定结构相连;多个与转动支点的数量一致并一一对应转动连接于各转动支点的滚珠;可动结构,设于外滚珠座内,可动结构的底部与连接部相连,可动结构包括内滚珠座及安装于内滚珠座上的镜头,内滚珠座的外周设置有至少四个与各滚珠一一对应的球面段,各球面段的球心均重合于旋转中心,滚珠与球面段抵接;驱动结构,能够驱动可动结构绕至少两个旋转轴线转动。本申请的防抖相机模组,姿态差对防抖表现的影响小,组装难度低,便于实现量产。
Description
本申请涉及一种防抖相机模组。
近年来,具有拍摄功能的小型移动装置十分普及,应用范围亦不断扩展,包括:航拍、运动相机以及行车记录仪等。在这类具有拍摄功能的移动装置中,均包括相机模组;由此可知,相机模组的市场庞大。
在利用上述移动装置进行拍摄照片或影片时,由于受到外来振动因素的影响,拍出来的照片或影片可能会模糊,并影响影像质量,而在振动比较强烈或者在拍摄光线较弱的情况下,上述不利影响则会加剧。
为了解决上述问题,市场上出现了一些小型防抖技术;而通过机械防抖方法来补偿外来振动的效果较佳。具体地,机械防抖是通过防抖致动器平移和/或旋转镜头及图像传感器,从而达到防抖效果。
现有技术中,滚珠式防抖相机模组(参考文件CN111664324A)可以实现多轴旋转自由度,且由于其位移弹簧系数较高,不同姿态差及地心吸力方向改变造成对防抖表现的影响较低,应用十分广泛。但是,如CN111664324A中所记载的那样,外座体与内座体之间通过一组滚珠转动连接,且其中两个滚珠位于旋转中心的上方,另外两个滚珠位于旋转中心的下方,当组装外座体与转动结构时,不可避免地会出现干涉,特别是当内座体上与滚珠相接触的切面与镜头的光轴之间的夹角较大时,会造成更大的组装难度,导致无法量产。
发明内容
本申请的一个目的在于提供一种防抖相机模组,其不仅能够提供多轴自由度,减少姿态差对防抖表现的影响,且能够有效降低组装难度,便于实现量产。
本申请的目的是通过如下技术方案实现的:
一种防抖相机模组,其包括:
固定结构,所述固定结构包括呈分体的至少两个外滚珠座,所述至少两个外滚珠座相连且共同限定有通口,各所述外滚珠座上均具有转动支点,所述转动支点的总数至少为四个,且位于所述通口内;
第一电路板,所述第一电路板具有依次连接的固定部、弹性部及连接部,所述固定部与所述固定结构相连;
连接结构,所述连接结构包括多个与所述转动支点的数量一致的滚珠,所述多个滚珠一一对应转动连接于各所述转动支点;
可动结构,所述可动结构穿设于所述通口内,所述可动结构的底部与所述连接部相连,所述可动结构包括内滚珠座及安装于所述内滚珠座上的镜头,所述内滚珠座的外周设置有至少四个与各所述滚珠一一对应的球面段,各所述球面段的球心均重合于旋转中心,所述滚珠与所述球面段抵接;以及
驱动结构,所述驱动结构能够驱动所述可动结构绕至少两个旋转轴线转动。
本申请一些实施例中,所述固定结构包括两个呈上下叠设的所述外滚珠座,各所述外滚珠座上均具有上、下 贯穿的开口,两个所述开口连通限定形成所述通口,各所述外滚珠座上均设有至少两个所述转动支点;
其中,将经过所述旋转中心且与所述镜头的光轴垂直的平面定义为第一参考平面,位于上方的所述外滚珠座上的转动支点均位于所述第一参考平面的上方,位于下方的所述外滚珠座上的转动支点均位于所述第一参考平面的下方。
本申请一些实施例中,各所述球面段的直径相同,各所述外滚珠座上均设有两个所述转动支点,各所述球面段上与所述滚珠相接位置处的切面与所述镜头的光轴之间的夹角相等;
沿俯视方向观察,位于上方的所述外滚珠座上的两个转动支点及所述旋转中心均位于第一参考直线上,位于下方的所述外滚珠座上的两个转动支点及所述旋转中心均位于第二参考直线上;
其中,所述第一参考直线与所述第二参考直线垂直。
本申请一些实施例中,各所述外滚珠座均包括:
基座,所述开口开设于所述基座上;以及
至少两个夹持部,所述夹持部连接于所述基座的开口处,所述夹持部上开设有凹槽,所述滚珠设于所述凹槽内,且所述转动支点限定于所述凹槽的内壁面上;
其中,两个所述基座呈上下叠设。
本申请一些实施例中,至少一个夹持部被配置为:
通过一弹性臂悬空设置于所述开口内,所述弹性臂的一端连接于所述基座,所述弹性臂的另一端连接所述夹持部,且满足关系式:L≥4t;其中,L为所述弹性臂的长度,t为所述弹性臂的厚度。
本申请一些实施例中,至少一个所述外滚珠座上设有限位件,所述内滚珠座的外周设有缺口,所述限位件与所述缺口配合限位,能够限制所述可动结构相对于所述固定结构的转动角度。
本申请一些实施例中,所述驱动结构包括至少两组致动器,所述至少两组致动器沿所述内滚珠座的外周呈周向间隔设置;
所述致动器包括相对设置的线圈及磁石,所述线圈及所述磁石分设于所述通口的内周壁上及所述内滚珠座的外周壁上。
本申请一些实施例中,所述磁石设于所述通口的内周壁上,所述线圈设于所述内滚珠座的外周壁上。
本申请一些实施例中,各组所述致动器中,所述磁石全部覆盖所述线圈,且所述磁石外沿均突出于所述线圈的外沿。
本申请一些实施例中,至少一个所述致动器还包括金属片,所述金属片设于所述内滚珠座的外周壁上,且所述金属片设于所述线圈的外周和/或内周。
本申请一些实施例中,所述可动结构还包括:
第二电路板,所述第二电路板连接于所述镜头的底部,且所述第二电路板的底面与所述连接部采用机械及电性连接,所述第二电路板的顶面设有图像传感器。
本申请一些实施例中,所述镜头包括:
镜头座,所述镜头座连接于所述内滚珠座的内周;以及
光学单元,所述光学单元穿设于所述镜头座的内周,所述图像传感器与所述光学单元相对设置。
本申请一些实施例中,所述可动结构还包括:
第三电路板,所述第三电路板安装于所述内滚珠座的外周,且与所述第二电路板电性连接,所述第三电路板上设有位置传感器和/或惯性测量单元。
本申请一些实施例中,所述第三电路板包括:
围框,所述围框搭接于所述内滚珠座的顶端面上;以及
多个延伸臂,所述多个延伸臂周向间隔设于所述内滚珠座的外周,所述延伸臂的上端与所述围框相连,各所述延伸臂的外侧均设有所述位置传感器。
本申请一些实施例中,所述内滚珠座的外周壁上开设有多个与各所述延伸臂一一相对的卡槽,所述卡槽的顶部贯穿于所述内滚珠座的顶面,所述延伸臂容置于所述卡槽内。
本申请一些实施例中,所述第三电路板还包括:
下延板,所述下延板与各所述延伸臂在周向上错开分布,所述下延板包括依次连接的侧板及端板,所述侧板的顶侧与所述围框相连,所述端板的一侧与所述侧板的底侧相连,且沿所述镜头的径向延伸,所述侧板贴合于所述内滚珠座的外周壁设置,所述端板贴合于所述第二电路板的底面设置,所述侧板的外侧设有所述惯性测量单元。
本申请一些实施例中,所述固定结构还包括:
外壳,所述外壳内具有安装腔,所述外壳的顶部开设有连通至所述安装腔的穿口,所述至少两个外滚珠座及所述第一电路板安装于所述外壳的安装腔内,所述镜头的顶部穿设于所述穿口内。
本申请一些实施例中,所述外壳包括:
下壳体;以及
上壳体,所述上壳体盖合于所述上壳体的顶部,且所述安装腔限定于所述上壳体与所述下壳体之间;
其中,所述固定部部分夹设于所述上壳体与所述下壳体之间。
本申请一些实施例中,所述固定部部分伸出于所述外壳的外部,所述固定部伸出于所述外壳的外部区域设有插接头。
本申请一些实施例中,所述弹性部包括:
至少两个弹性丝,各所述弹性丝同处于第二参考平面上,所述弹性丝的一端连接所述固定部,所述弹性丝的另一端连接所述连接部,所述弹性丝包括至少两个依次呈折弯连接的连接段。
其中,所述第二参考面与所述镜头的光轴垂直。
本申请一些实施例中,所述至少两个间隔设置的弹性丝对称分布于所述连接部的两侧;
其中,所述第二参考平面与所述镜头的光轴垂直。
本申请一些实施例中,所述外壳的外侧有过口,所述过口连通至所述安装腔;所述弹性部包括:
弹性板,所述弹性板的一端连接所述固定部,所述弹性板的另一端连接所述连接部,所述弹性板包括依次连接的第一板体及第二板体,所述第一板体的板面平行于所述镜头的光轴,所述第二板体的板面垂直于所述光轴,所述第一板体的一侧连接所述固定部,所述第一板体的另一侧连接所述第二板体的一侧,所述第二板体的另一侧连接所述连接部,所述第二板体设于所述过口内。
本申请一些实施例中,所述第一板体包括依次连接的两个壁面,且所述两个壁面垂直。本申请一些实施例中,
本申请的防抖相机模组,固定结构与可动结构之间通过包括弹性部的第一电路板及至少四个滚珠转动相连,在驱动结构的作用下,可动结构能够相对固定结构发生多轴转动,且不同姿态差对防抖表现的影响较低;另外,本申请中的固定结构设置呈分体的至少两个外滚珠座,且各外滚珠座上均具有连接滚珠的转动支点,在组装时,首先依次将各外滚珠座通过滚珠安装于可动结构的外周,再与其它部件进行装配,从而能够有效降低装配难度,实现产品量产。
以下结合附图和优选实施例来对本申请进行进一步详细描述,但是本领域技术人员将领会的是,这些附图仅是出于解释优选实施例的目的而绘制的,并且因此不应当作为本申请范围的限制。此外,除非特别指出,附图仅是意在概念性地表示所描述对象的组成或构造并可能包含夸张性显示,并且附图也并非一定按比例绘制。
图1是根据本申请一些实施例的防抖相机模组的结构示意图;
图2是图1的***示意图;
图3是根据本申请一些实施例的防抖相机模组的俯视图;
图4是图3的A-A向剖视图;
图5是图3的B-B向剖视图;
图6是图3的C-C向剖视图;
图7是图3的D-D向剖视图;
图8是图1中外滚珠座与磁石之间的***示意图;
图9是图1中内滚珠座与第三电路板、线圈之间的***示意图;
图10是图1中的第一电路板的结构示意图;
图11是本申请一些实施例的防抖相机模组的***示意图;
图12是本申请一些实施例的防抖相机模组中关于外滚珠座与内滚珠座的装配示意图;
图13是本申请一些是实施例的防抖相机模组中关于外滚珠座与内滚珠座的装配示意图;
图14是本申请一些实施例的防抖相机模组的结构示意图;
图15是图14中的第一电路板的结构示意图;
图中,
100、固定结构;110、外滚珠座;111、转动支点;112、基座;1121、开口;113、夹持部;1131、凹槽;114、弹性臂;115、限位件;120、通口;130、外壳;131、安装腔;132、穿口;133、下壳体;134、上壳体;135、过口;
200、第一电路板;210、固定部;211、插接头;220、弹性部;221、弹性丝;2211、连接段;222、弹性板;2221、第一板体;2221a、壁面;2222、第二板体;230、连接部;
300、连接结构;310、滚珠;
400、驱动结构;410、致动器;411、线圈;412、磁石;413、金属片;
500、可动结构;510、内滚珠座;511、球面段;512、缺口;513、卡槽;520、镜头;521、镜头座;522、光学单元;530、第二电路板;531、图像传感器;540、第三电路板;541、位置传感器;542、惯性测量单元;543、围框;544、延伸臂;545、下延板;5451、侧板;5452、端板;
X、第一参考直线;Y、第二参考直线;Z、镜头的光轴;a、参考球面。
以下将参考附图来详细描述本申请的优选实施例。本领域中的技术人员将领会的是,这些描述仅为描述性的、示例性的,并且不应当被解释为限定了本申请的保护范围。
首先,需要说明的是,在本文中所提到的顶部、底部、朝上、朝下等方位是相对于各个附图中的方向来定义的,它们是相对的概念,并且因此能够根据其所处于的不同位置和不同的实用状态而改变。所以,不应将这些或其他方位用于理解为限制性用语。
应注意,术语“包括”并不排除其他要素或步骤,并且“一”或“一个”并不排除复数。
此外,还应当指出的是,对于本文的实施例中描述或隐含的任意单个技术特征,或在附图中示出或隐含的任意单个技术特征,仍能够在这些技术特征(或其等同物)之间继续进行组合,从而获得未在本文中直接提及的本申请的其他实施例。
另外还应当理解的是,本文中采用术语“第一”、“第二”等来描述各种信息,但这些信息不应限于这些术语,这些术语仅用来将同一类型的信息彼此区分开。例如,在不脱离本申请范围的情况下,“第一”信息也可以被称为“第二”信息,类似的,“第二”信息也可以被称为“第一”信息。
应当注意的是,在不同的附图中,相同的参考标号表示相同或大致相同的组件。
如图1-图15所示,本申请实施例提出一种防抖相机模组,其包括:固定结构100、第一电路板200、连接结构300、可动结构500以及驱动结构400。
固定结构100包括两个外滚珠座110,两个外滚珠座110并非采用一体成型,即两个外滚珠座110整体呈分体式,能够彼此拆除,两个外滚珠座110呈上下叠设相连,各外滚珠座110上均具有贯穿上下的开口1121,两个开口1121连通限定成贯穿上下的通口120,各外滚珠座110上均具有两个转动支点111,即转动支点111的总数为四个,且均位于通口120内;第一电路板200具有依次连接的固定部210、弹性部220及连接部230,固定部210与固定结构100相连;连接结构300包括四个一一对应转动连接各转动支点111的滚珠310;可动结构500穿设于通口120内,可动结构500的底部与连接部230相连,可动结构500包括内滚珠座510及安装于内滚珠座510上的镜头520,内滚珠座510的外周设置有至少四个与各滚珠310一一对应的球面段511,各球面段511的球心均重合于旋转中心,该旋转中心经过镜头520的光轴Z,滚珠310与球面段511抵接;驱动结构400能够驱动可动结构500绕至少两个旋转轴线转动,各旋转轴线经过或大致经过旋转中心。
基于上述结构,在具体运行过程中,当存在外部振动时,驱动结构400驱动可动结构500相对固定结构100转动,且当该转动与外部振动方向相反且振幅相同时,则能把外部振动抵消掉,从而实现防抖;两个外滚珠座110与内滚珠座510之间设置四个滚珠310,四个滚珠310分别与内滚珠座510上的四个共心的球面段511一一对应抵接,能够实现多轴转动防抖(具体根据驱动结构400能够对可动结构500所施加的驱动力方向来确定转动轴线的方向),且四个滚珠310能够对可动结构500实现稳定可靠的支撑,减少姿态差对防抖表现的影响,第一电路板200为弹性电路板,连接可动结构500的底部及固定结构100,在防抖运动中可达到阻尼效果,且在防抖完成后能够实现可动结构500的自动回弹复位;另外,由于包括呈分体式的两个外滚珠座110,两个外滚珠座110上分别设有两个与滚珠310转动连接的转动支点111,在组装时,可采用从上至下、或者从下至上的方式依次将两个外滚珠座110通过滚珠310连接至内滚珠座510的外周,装配简单,便于实现产品的量产。
本申请一些实施例中,根据实际需求,可将上述通口120设置成左右贯穿或者呈其它倾斜贯穿的形式,在本申请中不作限定。
本申请一些优选实施例中,参阅附图2-图5所示,为了能够进一步便于装配各外滚珠座110及内滚珠座510, 且能够对可动结构500进行稳定地支撑,使得可动结构500在实现多轴防抖转动时受姿态差影响小,将经过旋转中心且与镜头520的光轴Z垂直的平面定义为第一参考平面,位于上方的外滚珠座110上的转动支点111均位于第一参考平面的上方,位于下方的外滚珠座110上的转动支点111均位于第一参考平面的下方。
进一步优选地,具体如图4及图5所示,各球面段511的直径设为相等,即各球面段511均处于同一参考球面a上;各球面段511上与滚珠310相接位置处的切面与镜头520的光轴Z之间的夹角β(附图中未具体标识出)相等,如图5所示;如图3所示,沿俯视方向观察,位于上方的外滚珠座110上的两个转动支点111及旋转中心均位于第一参考直线X上,位于下方的外滚珠座110上的两个转动支点111及旋转中心均位于第二参考直线Y上;其中,第一参考直线X与第二参考直线Y垂直。基于该结构,当β较大时,能够有效降低组装难度,且实现稳定的多轴防抖效果。
需要说明的是,本申请一些实施例中,同样可将各球面段511的直径设置为不相等,即只要保证各球面段511的球心重合即可。
如图8所示,两个外滚珠座110上下叠设后,整体呈矩形,四个滚珠310分别设于该矩形四个角的位置处。
继续参阅附图4、5以及8所示,本申请一些实施例中,各外滚珠座110均包括:基座112及两个夹持部113,开口1121开设于基座112上,夹持部113连接于基座112的开口1121处,且各夹持部113上均设有一转动支点111;且两个基座112呈上下叠设,滚珠310设于各夹持部113与内滚珠座510之间。
另外,如图4-8所示,一些实施例中,为了保证旋转防抖的稳定性,夹持部113上开设有凹槽1131,滚珠310设于凹槽1131内,且转动支点111限定于凹槽1131的内壁面上。
本申请一些实施例中,为了进一步降低装配难度,两个外滚珠座110中的至少一个夹持部113被配置为:通过一弹性臂114悬空设置于开口1121内,弹性臂114的一端连接于基座112,弹性臂114的另一端连接夹持部113,如图5所示,弹性臂114设置于第一参考平面上,且沿参考球面a的径向延伸,弹性臂114满足关系式:L≥4t;其中,L为弹性臂114的延伸长度,t为弹性臂114的厚度;满足上述关系式的弹性臂114的径向弹性系数较低,从而使得零件公差及装配公差对施加在滚珠310上的正向力及摩擦力的影响较低,进而能够降低零件加工公差及装配公差,从而降低生产难度,减少生产成本,提高生产良率。
参阅附图12、13所示,本申请一些实施例中,至少一个外滚珠座110上设有限位件115,内滚珠座510的外周设有缺口512,限位件115与缺口512配合限位,能够限制可动结构500相对于固定结构100的转动角度;通过在外滚珠座110上设置限位件115能够与内滚珠座510上的缺口512进行机械限位,避免在防抖运动或者跌落时,活动部件出现过大的转动,影响产品的使用可靠性。其中,附图12中示出了仅在其中一个外滚珠座110上设有限位件115的实施方式,而附图13中示出了在两个外滚珠座110上分别设有限位件115的具体实施方式。
示例性地,本申请一些实施例中,驱动结构400包括至少两组致动器410,至少两组致动器410沿内滚珠座510的外周呈周向间隔设置;致动器410包括相对设置的线圈411及磁石412,线圈411及磁石412分设于通口120的内周壁上及内滚珠座510的外周壁上(具体包括两种设置形式,第一种为将线圈411设于通口120的内周壁上,磁石412设于内滚珠座510的外周壁上;另一中为将线圈411设于内滚珠座510的外周壁上,而将磁石412设于通口120的内周壁上)。
在防抖运动时,通过改变线圈411的电流,则可以改变施加在可动结构500上的电磁力,从而使得可动结构500转动,当该转动与外部的振动方向相反且振幅接近时,则实现有效防抖。
具体地,各组致动器410能够分别控制可动结构500绕一旋转轴线防抖转动,而该旋转轴线的具体方向则根据线圈411的布置方位有关;致动器410的组数根据具体需要的防抖旋转自由度来选择设置。
如图1-10所示出的实施例中,其设置两组致动器410,即可动结构500具有两轴旋转自由度;如图11所示出的实施例中,其设置三组致动器410,可动结构500具有三轴旋转自由度。
本申请一些优选实施例中,将磁石412设于通口120的内周壁上,而线圈411设于内滚珠座510的外周壁上,且在各组致动器410中,磁石412全部覆盖线圈411,且磁石412外沿均突出于线圈411的外沿,具体如图6及图7所示,磁石412的上端及下端分别超过线圈411的上侧及下侧;在防抖运动中,线圈411可以在磁场较强的区域,可更有效地利用装配空间,并提高磁力,从而使得产品整体结构更加紧凑,并提高防抖角度、减少功耗。另外,将磁石412固定在固定结构100上,可有效减轻位于附近的磁石412对防抖相机模组的磁干扰作用,以避免影响防抖效果。
如图11所示,本申请一些实施例中,三个致动器410均还包括金属片413,金属片413设于内滚珠座510的外周壁上,且线圈411位于金属片413与磁石412之间;在防抖运动时,金属片413会相对磁石412转动,从而产生反电动势及与防抖运动相反的电磁力,能有效增加控制***中的阻尼作用,提高高频防抖效果;另外,在电子***因不通电而失效时,该阻尼作用依然存在,能有效减少在不通电时因外来振动造成可动结构500的不必要运动及噪声。
本申请一些实施例中,可将上述实施例中的金属片413设置于内滚珠座510的外周壁位于线圈411的外周位置处,即致动器410包括从内至外依次相对设置的:线圈411、金属片413、磁石412。
同样地,也可在各线圈411的内、外侧分别设置金属片413。
本申请一些实施例中,可仅在部分致动器410中设置金属片413,同样也能达到上述效果。
另外,需要说明的是,本申请一些实施例中,还可以在可动结构500中设置其它致动装置,以驱动镜头520沿光轴运动实现自动对焦功能,例如:采用形状记忆合金马达驱动镜头520。
继续参阅附图1-图11所示,可动结构500还包括:第二电路板530;第二电路板530连接于镜头520的底部,且第二电路板530的底面与连接部230采用机械及电性连接,第二电路板530的顶面上设有图像传感器531;第一电路板200能够电性连接其它外部控制板(例如:具有拍摄功能的小型移动装置中的主板),使得外部控制板通过第一电路板200与图像传感器531沟通,并获取影响信息。
本申请一些实施例中,镜头520包括:镜头座521及光学单元522,镜头座521连接于内滚珠座510的内周,光学单元522穿设于镜头座521的内周,即光学单元522通过镜头座521连接于内滚珠座510上,图像传感器531与光学单元522相对设置。
进一步地,本申请一些实施例中,可动结构500还包括:第三电路板540,第三电路板540安装于内滚珠座510的外周,且与第二电路板530电性连接,第三电路板540上设有位置传感器541和/或惯性测量单元542;通过读取位置传感器541上的信息后,可以实现闭环防抖控制,达到更佳的防抖效果,具体通过获取位置传感器541上的位置信息来控制各线圈411上的电流通断及大小;另外,通过读取和图像传感器531一起运动的惯性测量单元542上的数据,可以额外增设电子防抖,达到更好的防抖效果。
具体如图11所示,本申请一些实施例中,为了简化结构,使得产品整体紧凑,第三电路板540包括:围框543、下延板545及多个延伸臂544;围框543搭接于内滚珠座510的顶端面上,多个延伸臂544周向间隔设于内滚珠座510的外周,延伸臂544的上端与围框543相连,各延伸臂544的外侧均设有位置传感器541,下延板545与各延伸臂544在周向上错开分布,下延板545包括依次连接的侧板5451及端板5452,侧板5451的顶侧与围框543相连,端板5452的一侧与侧板5451的底侧相连,且沿镜头520的径向向内延伸,侧板5451贴合于内滚珠座510的外周壁设置,端板5452贴合于第二电路板530的底面设置,侧板5451的外侧设有惯性测量单元 542。
示例性地,本申请一些实施例中,各线圈411均一一对应环设于位置传感器541的外周,即位置传感器541设于线圈411的中间位置。
更进一步地,为了保证结构更加紧凑,一些实施例中,内滚珠座510的外周壁上开设有多个与各延伸臂544一一相对的卡槽513,卡槽513的顶部贯穿于内滚珠座510的顶面,延伸臂544容置于卡槽513内。
本申请一些实施例中,固定结构100还包括:外壳130,外壳130内具有安装腔131,外壳130的顶部开设有连通至安装腔131的穿口132,至少两个外滚珠座110及第一电路板200安装于外壳130的安装腔131内,镜头520的顶部穿设于穿口132内;外壳130能够对设于其安装腔131内的各部件进行有效防护。
另外,为了便于组装,外壳130包括两个壳体,其分别为:下壳体133及上壳体134,上壳体134盖合于下壳体133的顶部,且安装腔131限定于上壳体134与下壳体133之间;其中,固定部210部分夹设于上壳体134与下壳体133之间。具体装配时,先将活动部件组装成整体,再将各外滚珠座110依次通过滚珠310装配于内滚珠座510外周,再将第一电路板200与第二电路板530相连,最后将上壳体134与下壳体133盖合后即完成装配。
示例性地,上壳体134与下壳体133之间采用点胶或者焊接相连。
另外,为了便于连接外部电路部分,本申请一些实施例中,固定部210部分伸出于外壳130的外部,固定部210伸出于外壳130的外部区域设有插接头211。
如图10所示,本申请一些实施例中,弹性部220包括:至少两个弹性丝221,至少两个弹性丝221均设于安装腔131内,各弹性丝221同处于第二参考平面上,弹性丝221的一端连接固定部210,弹性丝221的另一端连接于连接部230,弹性丝221包括至少两个依次呈折弯连接的连接段2211。通过将至少两个弹性丝221均设置于同一第二参考平面上,能够达到较好的阻尼及回弹效果。
进一步地,继续参阅附图10所示,本申请一些优选实施例中,在弹性部220上,至少两个间隔设置的弹性丝221对称分布于连接部230的两侧;其中,第二参考平面与镜头520的光轴Z垂直。
另外一些实施例中,如图14及图15所示,上壳体134与下壳体133之间限定有过口135,过口135位于外壳130的外侧并连通至安装腔131;弹性部220包括:弹性板222,弹性板222的一端连接固定部210,弹性板222的另一端连接于连接部230,弹性板222包括依次连接的第一板体2221及第二板体2222,第一板体2221的板面平行于镜头520的光轴Z,第二板体2222的板面垂直于光轴Z,第一板体2221的一侧连接固定部210,第一板体2221的另一侧连接第二板体2222的一侧,第二板体2222的另一侧连接于连接部230,第二板体2222设于过口135内。该产品的结构更加简单,空间利用率较高,可有效减小整个产品的体积,并同样能够保证较好的阻尼及回弹效果。
更进一步地,继续参阅附图15所示,为了实现更好的阻尼作用及回弹效果,本申请一些实施例中,第一板体2221包括依次连接的两个壁面2221a,且两个壁面2221a垂直。
另外,需要说明的是,本申请实施例中,连接部230与下壳体133的底面之间需留有一定的活动空间,以保证连接部230能够相对固定部210转动。
本申请一些实施例中,外壳130可设置为其它形式,例如:一体式结构、呈上下叠设的两个以上的壳体、呈左右盖合的两个或多个壳体等,在本申请中不作限定。
本申请一些优选实施例中,可在可动结构500与固定结构100之间设置多于四个滚珠310,即在至少一个外滚珠座110上连接三个或三个以上滚珠310。而本申请中,最少设置四个滚珠310即可,不仅能够实现可动结构500与固定结构100之间的稳定连接,并使得结构简化。
另外,需要说明的,本申请一些实施例中的防抖相机模组,可采用呈分体式的至少两个外滚珠座110(两个或者多个)通过其它组装形式(附图中未具体示出)。示例性地:各外滚珠座110的一侧均具有卡口,各滚珠310座首尾依次相连,各卡口连通限定成上述通口120,装配时,通过沿周向依次连接各外滚珠座110,从而将可动结构500与各外滚珠座110通过滚珠310转动相连。
综上,本申请实施例的防抖相机模组,固定结构100与可动结构500之间通过包括弹性部220的第一电路板200及至少四个滚珠310转动相连,在驱动结构400的作用下,可动结构500能够相对固定结构100发生多轴转动,且不同姿态差对防抖表现的影响较低;另外,本申请中的固定结构100设置呈分体的至少两个外滚珠座110,且各外滚珠座110上均具有连接滚珠310的转动支点111,在组装时,首先依次将各外滚珠座110通过滚珠310安装于可动结构500的外周,再与其它部件进行装配,从而能够有效降低装配难度,实现产品量产。
本说明书参考附图来公开本申请,并且还使本领域中的技术人员能够实施本申请,包括制造和使用任何装置或***、采用合适的材料以及使用任何结合的方法。本申请的范围由请求保护的技术方案限定,并且包括本领域中的技术人员想到的其他实例。只要此类其他实例包括并非不同于请求保护的技术方案字面语言的结构元件,或此类其他实例包含与请求保护的技术方案的字面语言没有实质性区别的等价结构元件,则此类其他实例应当被认为处于本申请请求保护的技术方案所确定的保护范围内。
Claims (21)
- 一种防抖相机模组,其特征在于,包括:固定结构,所述固定结构包括呈分体的至少两个外滚珠座,所述至少两个外滚珠座相连且共同限定有通口,各所述外滚珠座上均具有转动支点,所述转动支点的总数至少为四个,且位于所述通口内;第一电路板,所述第一电路板具有依次连接的固定部、弹性部及连接部,所述固定部与所述固定结构相连;连接结构,所述连接结构包括多个与所述转动支点的数量一致的滚珠,所述多个滚珠一一对应转动连接于各所述转动支点;可动结构,所述可动结构穿设于所述通口内,所述可动结构的底部与所述连接部相连,所述可动结构包括内滚珠座及安装于所述内滚珠座上的镜头,所述内滚珠座的外周设置有至少四个与各所述滚珠一一对应的球面段,各所述球面段的球心均重合于旋转中心,所述滚珠与所述球面段抵接;以及驱动结构,所述驱动结构能够驱动所述可动结构绕至少两个旋转轴线转动。
- 根据权利要求1所述的防抖相机模组,其特征在于,所述固定结构包括两个呈上下叠设的所述外滚珠座,各所述外滚珠座上均具有上、下贯穿的开口,两个所述开口连通限定形成所述通口,各所述外滚珠座上均设有至少两个所述转动支点;其中,将经过所述旋转中心且与所述镜头的光轴垂直的平面定义为第一参考平面,位于上方的所述外滚珠座上的转动支点均位于所述第一参考平面的上方,位于下方的所述外滚珠座上的转动支点均位于所述第一参考平面的下方。
- 根据权利要求2所述的防抖相机模组,其特征在于,各所述球面段的直径相同,各所述外滚珠座上均设有两个所述转动支点,各所述球面段上与所述滚珠相接位置处的切面与所述镜头的光轴之间的夹角相等;沿俯视方向观察,位于上方的所述外滚珠座上的两个转动支点及所述旋转中心均位于第一参考直线上,位于下方的所述外滚珠座上的两个转动支点及所述旋转中心均位于第二参考直线上;其中,所述第一参考直线与所述第二参考直线垂直。
- 根据权利要求2所述的防抖相机模组,其特征在于,各所述外滚珠座均包括:基座,所述开口开设于所述基座上;以及至少两个夹持部,所述夹持部连接于所述基座的开口处,所述夹持部上开设有凹槽,所述滚珠设于所述凹槽内,且所述转动支点限定于所述凹槽的内壁面上;其中,两个所述基座呈上下叠设。
- 根据权利要求4所述的防抖相机模组,其特征在于,至少一个夹持部被配置为:通过一弹性臂悬空设置于所述开口内,所述弹性臂的一端连接于所述基座,所述弹性臂的另一端连接所述夹持部,且满足关系式:L≥4t;其中,L为所述弹性臂的长度,t为所述弹性臂的厚度。
- 根据权利要求1所述的防抖相机模组,其特征在于,至少一个所述外滚珠座上设有限位件,所述内滚珠座的外周设有缺口,所述限位件与所述缺口配合限位,能够限制所述可动结构相对于所述固定结构的转动角度。
- 根据权利要求1-6中任一项所述的防抖相机模组,其特征在于,所述驱动结构包括至少两组致动器,所述至少两组致动器沿所述内滚珠座的外周呈周向间隔设置;所述致动器包括相对设置的线圈及磁石,所述线圈及所述磁石分设于所述通口的内周壁上及所述内滚珠座的外周壁上。
- 根据权利要求7所述的防抖相机模组,其特征在于,所述磁石设于所述通口的内周壁上,所述线圈设于所述内滚珠座的外周壁上。
- 根据权利要求8所述的防抖相机模组,其特征在于,各组所述致动器中,所述磁石全部覆盖所述线圈,且所述磁石外沿均突出于所述线圈的外沿。
- 根据权利要求8所述的防抖相机模组,其特征在于,至少一个所述致动器还包括金属片,所述金属片设于所述内滚珠座的外周壁上,且金属片设于所述线圈的外周和/或内周。
- 根据权利要求1-6中任一项所述的防抖相机模组,其特征在于,所述可动结构还包括:第二电路板,所述第二电路板连接于所述镜头的底部,且所述第二电路板的底面与所述连接部采用机械及电性连接,所述第二电路板的顶面设有图像传感器。
- 根据权利要求11所述的防抖相机模组,其特征在于,所述镜头包括:镜头座,所述镜头座连接于所述内滚珠座的内周;以及光学单元,所述光学单元穿设于所述镜头座的内周,所述图像传感器与所述光学单元相对设置。
- 根据权利要求11所述的防抖相机模组,其特征在于,所述可动结构还包括:第三电路板,所述第三电路板安装于所述内滚珠座的外周,且与所述第二电路板电性连接,所述第三电路板上设有位置传感器和/或惯性测量单元。
- 根据权利要求13所述的防抖相机模组,其特征在于,所述第三电路板包括:围框,所述围框搭接于所述内滚珠座的顶端面上;以及多个延伸臂,所述多个延伸臂周向间隔设于所述内滚珠座的外周,所述延伸臂的上端与所述围框相连,各所述延伸臂的外侧均设有所述位置传感器。
- 根据权利要求14所述的防抖相机模组,其特征在于,所述内滚珠座的外周壁上开设有多个与各所述延伸臂一一相对的卡槽,所述卡槽的顶部贯穿于所述内滚珠座的顶面,所述延伸臂容置于所述卡槽内。
- 根据权利要求14所述的防抖相机模组,其特征在于,所述第三电路板还包括:下延板,所述下延板与各所述延伸臂在周向上错开分布,所述下延板包括依次连接的侧板及端板,所述侧板的顶侧与所述围框相连,所述端板的一侧与所述侧板的底侧相连,且沿所述镜头的径向延伸,所述侧板贴合于所述内滚珠座的外周壁设置,所述端板贴合于所述第二电路板的底面设置,所述侧板的外侧设有所述惯性测量单元。
- 根据权利要求1-6中任一项所述的防抖相机模组,其特征在于,所述固定结构还包括:外壳,所述外壳内具有安装腔,所述外壳的顶部开设有连通至所述安装腔的穿口,所述至少两个外滚珠座及所述第一电路板安装于所述外壳的安装腔内,所述镜头的顶部穿设于所述穿口内。
- 根据权利要求1-6中任一项所述的防抖相机模组,其特征在于,所述弹性部包括:至少两个弹性丝,各所述弹性丝同处于第二参考平面上,所述弹性丝的一端连接所述固定部,所述弹性丝的另一端连接所述连接部,所述弹性丝包括至少两个依次呈折弯连接的连接段。
- 根据权利要求18所述的防抖相机模组,其特征在于,所述至少两个间隔设置的弹性丝对称分布于所述连接部的两侧;其中,所述第二参考平面与所述镜头的光轴垂直。
- 根据权利要求17所述的防抖相机模组,其特征在于,所述外壳的外侧设有过口,所述过口连通至所述安装腔;所述弹性部包括:弹性板,所述弹性板的一端连接所述固定部,所述弹性板的另一端连接所述连接部,所述弹性板包括依次连 接的第一板体及第二板体,所述第一板体的板面平行于所述镜头的光轴,所述第二板体的板面垂直于所述光轴,所述第一板体的一侧连接所述固定部,所述第一板体的另一侧连接所述第二板体的一侧,所述第二板体的另一侧连接所述连接部,所述第二板体设于所述过口内。
- 根据权利要求20所述的防抖相机模组,其特征在于,所述第一板体包括依次连接的两个壁面,且所述两个壁面垂直。
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