CN114545582B - Piezoelectric spring piece type driving device for miniature camera - Google Patents
Piezoelectric spring piece type driving device for miniature camera Download PDFInfo
- Publication number
- CN114545582B CN114545582B CN202011298076.9A CN202011298076A CN114545582B CN 114545582 B CN114545582 B CN 114545582B CN 202011298076 A CN202011298076 A CN 202011298076A CN 114545582 B CN114545582 B CN 114545582B
- Authority
- CN
- China
- Prior art keywords
- movable part
- automatic focusing
- piezoelectric
- focusing movable
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 210000000078 claw Anatomy 0.000 claims abstract description 13
- 230000002265 prevention Effects 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000005452 bending Methods 0.000 claims description 11
- 230000006698 induction Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
-
- 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
-
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention provides a piezoelectric spring sheet type driving device of a miniature camera, which is provided with an upper cover and a base to form a shell, wherein three sides of the base are provided with hand vibration prevention driving coils; an automatic focusing movable part is arranged in the base, and a power transmission part is inlaid on one side wall of the automatic focusing movable part; a movable part for preventing hand vibration is arranged in the automatic focusing movable part and is suspended and supported by the upper and lower spring plates; a piezoelectric ultrasonic motor driving unit arranged in front of the power transmission part of the automatic focusing movable part, wherein the contact end of the power transmission part is just contacted with the vibration claw of the tuning fork structure; when the piezoelectric ultrasonic motor driving unit is started, a large thrust force can be generated to stir the power transmission piece, so that the automatic focusing movable part can be easily pushed to a required position.
Description
Technical Field
The present invention relates to a piezoelectric spring driving device for miniature camera, and more particularly to a driving device for providing high-thrust anti-shake motor, which is suitable for the current low-cost and high-process maturity camera device.
Background
Under the condition of miniaturization, the camera modules of the smart phones are provided with small lens diaphragms and plastic materials with low light transmittance, so that the light quantity entering the image sensor is obviously smaller than the light quantity originally received by the digital camera; this requires a longer exposure time, which also causes a significant increase in the effect of hand vibration; for many years, the anti-shake technique of an optical image is the most effective method for eliminating the blurring effect caused by unintentional hand motion or camera shake, and is also a technique essential for providing high-quality images in professional cameras.
The image stabilization function in smart phones can make the quality of images and videos comparable to digital cameras under many operating conditions; thus, hand vibration prevention technology is increasingly favored by high-end functional hand-held device manufacturers, and motor manufacturers have been working on their image stabilization techniques and methods to significantly increase camera shutter speed and provide accurate camera vibration suppression; on the other hand, the camera module is developed toward higher resolution and higher pixels, and a significant disadvantage of this development is that the lens (prism) is larger and heavier, but the existing driving motor mechanism does not have a corresponding progress space, so that the problem is that the driving force of the electromagnetic driving device is not simultaneously updated because the lens is advanced and heavier, and therefore, when the preferred lens assembly is used, the disadvantage of insufficient driving force is caused when the system for preventing hand vibration and automatic focusing is used, which also seriously affects the functions of preventing hand vibration and automatic focusing.
In addition, in the existing triaxial electromagnetic driving device for miniature cameras, for the control of three axial directions, namely the X-Y-Z axis, an upper elastic sheet, a lower elastic sheet and 4 suspension wires are used as suspension systems, so that the defect of insufficient magnetic thrust is particularly caused for high-pixel large lenses, and generally, the improved method only can increase the thrust magnet to increase the thrust, but the volume is thicker, the cost is relatively high, and the method is a bottleneck that the existing design is applied to the high-pixel large lenses and the large thrust is extremely broken through.
Disclosure of Invention
The main objective of the present invention is to design a piezoelectric spring plate driving device for a miniature camera, and more particularly, to a piezoelectric spring plate driving device for a miniature camera, which can provide X, Y-axial motion perpendicular to the optical axis plane, in which an upper spring plate and a lower spring plate are suspended to support a hand vibration preventing movable part, and an ultrasonic motor driving unit with ultra-large output power is used for driving an automatic focusing movable part, so that the movement of a high-performance lens group can be optimized, the function of an advanced miniature camera can be fully upgraded, the conventional process equipment can be continued in the manufacturing process, and the manufacturing process is more convenient and the cost is saved.
The invention further aims to lighten the hand vibration prevention movable part so as to reduce the magnetic thrust requirement, and the hand vibration prevention movable part is arranged in the automatic focusing movable part, and the automatic focusing movable part and the hand vibration prevention movable part provide a power source through a piezoelectric ultrasonic motor, wherein the output force of the piezoelectric power source is 3-5 times of that of a common electromagnetic type, so that the hand vibration prevention movable part is suitable for the design of large thrust.
To achieve the above object, the present invention can be achieved in the following manner:
the piezoelectric spring piece type driving device of the miniature camera is characterized by at least comprising:
an upper cover with a central hole in the center;
a base, three continuous side walls and a door hole are arranged in the four side edges, and a window hole is arranged on each of the three continuous side walls;
the driving coil is provided with a first coil group, a second coil group and a third coil group which are arranged continuously and are respectively arranged in a U shape and are oppositely combined on three continuous side walls of the base; the hand vibration prevention driving coil is respectively provided with a Hall sensor in the X-axis and Y-axis directions;
an automatic focusing movable part which is provided with a middle hole and can be placed in the base, wherein three continuous side walls are arranged in the four sides of the automatic focusing movable part relative to the base, a front wall is opposite to a door hole of the base, and a side window hole is respectively arranged on the three continuous side walls of the automatic focusing movable part; the automatic focusing movable part is embedded with a power conducting piece on the front wall, one end of the power conducting piece is connected to the bottom of the automatic focusing movable part, and the other end of the power conducting piece extends out to form a contact end; an induction magnet is arranged on the front wall;
a hand vibration preventing movable part, which is provided with a middle hole in the center and is arranged in the automatic focusing movable part, and a driving magnet is respectively embedded in the side window holes of the automatic focusing movable part;
the piezoelectric ultrasonic motor driving unit comprises a tuning fork structure, two piezoelectric blocks and alternating voltage, wherein the two sides of one end of the tuning fork structure are oppositely provided with vibrating claws, and the two piezoelectric blocks are respectively arranged at the two sides of the tuning fork structure and are connected with the alternating voltage; the piezoelectric ultrasonic motor driving unit is arranged in front of the power transmission piece of the automatic focusing movable part, and the contact end of the power transmission piece is contacted with the vibration claw of the tuning fork structure; the automatic focusing driving circuit is also matched with the outer side of the piezoelectric ultrasonic motor driving unit;
the upper elastic sheet and the lower elastic sheet are respectively provided with four corner support handles, the support handles at the four corners are respectively extended to the center and provided with a bending part, and the tail end of the bending part is provided with an inner ring part; the upper spring plate and the lower spring plate can support the X-axis and Y-axis directions of the hand vibration prevention movable part to move, and can drive the repeated pushing of the Z-axis direction of the automatic focusing movable part by the piezoelectric ultrasonic motor driving unit.
The base is provided with a guide post on two sides of the door hole, and the front wall of the automatic focusing movable part is provided with a guide rail correspondingly.
The upper spring plate is connected between the support handles to form a square annular frame.
And a jointing protruding part with wider size is formed between the bending parts of the upper elastic sheet and the lower elastic sheet and the inner ring part.
The ratio of the depth to the width of the sections of the upper elastic sheet and the lower elastic sheet is between 1 and 3.
After the piezoelectric ultrasonic motor driving unit and the automatic focusing driving circuit are started, the two vibrating claw tips of the tuning fork structure form an elliptical motion track (elliptical motion) to push an object to move, and under different frequency driving, the two vibrating claw tips can generate a reverse clock and a clockwise motion track, generate a large thrust, push out or push back a power conducting piece and drive an automatic focusing movable part to advance or retreat.
Drawings
Fig. 1 is a combined appearance of the present invention.
Fig. 2 is a largely exploded view of the present invention with the upper cover and base open.
Fig. 3 is an exploded view of the detailed structure of the present invention with the upper cover removed.
Fig. 4-1 is a schematic diagram of the structure of the piezoelectric ultrasonic motor driving unit 1 according to the present invention.
Fig. 4-2 is a schematic diagram of the structure of the driving unit of the piezoelectric ultrasonic motor according to the present invention.
Fig. 5 is an external view of the auto-focus movable portion according to the present invention.
Fig. 6-1 is a schematic diagram 1 showing the pushing action of the tuning fork structure of the driving unit according to the present invention.
Fig. 6-2 is a schematic diagram of the action of the driving unit tuning fork structure pushing of the present invention 2.
Fig. 7 is an enlarged view of a partial structure of the present invention.
Fig. 8 is a cross-sectional elevation view of the invention of fig. 1.
Fig. 9 is an explanatory diagram of the operation of the voice coil motor driving unit for preventing hand vibration of the present invention.
Fig. 10 is a perspective view of the upper and lower spring plates of the present invention.
Fig. 11-1 is a plan view of the upper spring plate of the present invention.
Fig. 11-2 is a plan view of the lower spring plate of the present invention.
Reference numerals illustrate: 10, covering; 11 mesopores; a 20 base; a hole in 201; a 21 sidewall; 210 fenestrations; 22 sidewalls; 220 fenestrations; 23 side walls; 230 fenestration; 24 door holes; 251 fixing seat; 252 fixing seats; 261 guide post; 262 guide posts; 30 a hand vibration prevention movable part; 301 mesopores; 31 driving a magnet; 32 driving a magnet; 33 driving a magnet; 40, mounting an elastic sheet; 400 ring frames; 41 handles; 42 bending parts; 43 an inner ring portion; 431 engagement tab; 50 an auto-focusing movable part; 500 mesopores; 51 side walls; a 510 side aperture; 52 side walls; 520 side aperture; 53 sidewalls; 530 side aperture; 54 a front wall; 541 guide rails; 542 guide rail; 55 power conductors; 551 contact ends; 56 induction magnets; 60 a hand vibration prevention driving coil; a first coil group 61; a second coil set 62; 63 a third coil group; a 64 hall sensor; 65 hall sensors; a 70 piezoelectric ultrasonic motor driving unit; 71 a tuning fork structure; 711 vibrating jaw; 712 vibrating jaw; a 72 piezoelectric block; 73 piezoelectric blocks; 74 ac voltage; 80 an auto-focus driving circuit; a 90 lower spring plate; 91 handles; 92 bending parts; 93 an inner ring portion; 931 engage the tab; fx1 magnetic thrust; fx2 magnetic thrust; fy magnetic thrust; a T1 trace; t2 trace.
Detailed Description
Referring to fig. 1, 2 and 3, the piezoelectric dome driving device of the miniature camera according to the present invention at least comprises:
an upper cover 10 made of a non-magnetically conductive material, and a central hole 11 is provided in the upper cover 10.
A base 20 having three continuous side walls 21, 22, 23 and a door opening 24 formed in four sides thereof, wherein each of the three side walls 21, 22, 23 has an aperture 210, 220, 230; the door hole 24 has a fixing seat 251, 252 on two sides, and the fixing seat 251, 252 has a guide post 261, 262.
As shown in fig. 2, 3 and 9, a driving coil 60 for preventing hand vibration has a first coil set 61, a second coil set 62 and a third coil set 63 arranged in series, which are arranged in a U shape and are respectively engaged with three continuous side walls 21, 22 and 23 of the base 20; the first coil set 61 and the second coil set 62 (see fig. 3 and fig. 9) are respectively provided with a hall sensor 64 and 65.
Referring to fig. 2, 3 and 5, the auto-focusing movable part 50 has a central hole 500 and can be placed in the base 20, the auto-focusing movable part 50 has three continuous side walls 51, 52 and 53 on four sides thereof relative to the base 20, and has a front wall 54 opposite to the door hole 24 of the base 20, and the three side walls 51, 52 and 53 of the auto-focusing movable part 50 have one side window 510, 520 and 530; the front wall 54 is provided with guide rails 541, 542 relative to the guide rails 261, 262 of the base 20, and allows the guide rails 261, 262 to extend into the guide rails 541, 542; the auto-focusing movable part 50 is embedded with a power conducting member 55 on the front wall 54, one end of the power conducting member is connected to the bottom of the auto-focusing movable part 50, and the other end extends out to form a contact end 551; a sensing magnet 56 is also provided on the front wall 54.
Referring to fig. 2, 3 and 8, the anti-shake movable portion 30 has a center hole 301 disposed in the center thereof, is disposed in the auto-focus movable portion 50, and has a driving magnet 31, 32 and 33 respectively inserted into the side windows 510, 520 and 530 of the auto-focus movable portion 50.
Referring to fig. 3, 4-1, 4-2 and 5, a piezoelectric ultrasonic motor driving unit 70 includes a tuning fork structure 71, two piezoelectric blocks 72 and 73, and an ac voltage 74, wherein the tuning fork structure 71 is provided with vibrating claws 711 and 712 at two opposite sides of one end, and the two piezoelectric blocks 72 and 73 are respectively disposed at two sides of the tuning fork structure 71 and connected to the ac voltage 74; the piezoelectric ultrasonic motor driving unit 70 is disposed in front of the power transmission member 55 of the auto-focusing movable portion 50, and the contact end 551 of the power transmission member 55 is just contacted with the vibrating claws 711, 712 of the tuning fork structure 71; and the auto-focus driving circuit 80 is also coupled to the outside of the piezoelectric ultrasonic motor driving unit 70.
Referring to fig. 2, 3, 7 and 10, a set of upper and lower spring plates 40 and 90; the handles 41, 91 having four corners, each extending toward the center with a bending portion 42, 92, and an inner ring portion 43, 93 provided at the end of the bending portion 42, 92, the bending portion 42, 92 and the inner ring portion 43, 93 having a wide engagement protrusion 431, 931 formed therebetween for more stable engagement with the hand vibration preventing movable portion 30 and easy engagement of the upper and lower members; in the preferred embodiment of the upper spring 40, a square annular frame 400 is formed by connecting the support handles 41.
As shown in FIG. 7, in order to provide independent movement in the X-axis and Y-axis directions, the stiffness in the X-axis and Y-axis directions is much smaller than the stiffness in the Z-axis, namely Kx and Ky<<Kz, which is proportional to moment of inertia Ix (moment of inertia of an area) (ix=bh 3 /12), and Kx, ky are proportional to Iz (iz=hb) 3 (12); in FIG. 7, the cross section of the upper spring 40 is taken as an example (the same applies to the lower spring 90), so that the ratio of the depth h to the width b of the upper spring 40 is between 1 and 3, i.e. 1.0<h/b (aspect ratio)<3.0, the independent motion in the X-axis and Y-axis directions can be provided, but the bearing capacity in the Z-axis direction is excellent.
Referring to fig. 3, 7, 8 and 10, the upper spring plate 40 and the lower spring plate 90 are respectively connected to the upper and lower peripheral edges of the middle hole 301 of the anti-shake movable portion 30 by inner ring portions 43 and 93, and are respectively fixed to four corners of the inner side of the upper edge and the lower edge of the auto-focus movable portion 50 by four corner support handles 41 and 91, so that the anti-shake movable portion 30 is suspended in the auto-focus movable portion 50 by the upper spring plate 40 and the lower spring plate 90.
In the design of the present invention, as shown in fig. 1, 3 and 7, the hand vibration preventing movable portion 30 is disposed in the auto focusing movable portion 50 and is suspended by the upper elastic sheet 40 and the lower elastic sheet 90, the driving magnets 31, 32 and 33 on the three sides are used as power sources, the side windows 510, 520 and 530 of the auto focusing movable portion 50 are opposite to the first coil set 61, the second coil set 62 and the third coil set 63 of the hand vibration preventing driving coil 60, the magnetic circuit design is as shown in fig. 9, but as shown in fig. 3 and 7, the first coil set 61 and the third coil set 63 are connected in series and are connected with current ix in the X-axis direction, when the current ix is passed through the first coil set 61 and the third coil set 63, a Gaussian magnetic field and a magnetic thrust Fx3 of mutual attraction are generated between the driving magnets according to Gaussian Law (Gaussian Law), the total thrust fx=fx1+fx3, and the moving distance is fed back by a Hall Sensor (Hall Sensor 65); the second coil set 62 is supplied with a current iy in the Y-axis direction, and generates a magnetic thrust Fy between the Gaussian magnetic field and the driving magnet in the Y-axis direction according to Gaussian Law (Gaussian Law), and the moving distance is fed back by another Hall Sensor 64, so that the hand vibration preventing movable portion 30 can be pushed in the X-axis and Y-axis directions; the hand vibration preventing movable part 30 is disposed in the auto-focusing movable part 50 and is suspended by the upper spring plate 40 and the lower spring plate 90, and can be easily moved and reset in the X-axis and Y-axis directions.
The present invention has more excellent thrust force in auto-focusing, please refer to fig. 2, 3 and 5, the auto-focusing movable part 50 is disposed in the base 20, and the auto-focusing movable part 50 is embedded with a power conducting member 55 on the front wall 54, the power conducting member 55 is pushed by a piezoelectric ultrasonic motor driving unit 70 and an auto-focusing driving circuit 80, as shown in fig. 4-2, the piezoelectric ultrasonic motor driving unit 70 applies an ac voltage 74 (e.g. 2.5-3.3V) to the outer sides (same voltage) of the two piezoelectric blocks 72 and 73, and the common ground terminal is a tuning fork structure 71, so that the two vibrating claws of the tuning fork structure 71 and the contact points 711 and 712 of the power conducting member 55 form an elliptical motion track T1 (elliptical motion) to push the power conducting member 55 to move; then, as shown in fig. 3, 5, 6-1, and 6-2, after the driving frequencies of the piezoelectric ultrasonic motor driving unit 70 and the autofocus driving circuit 80 are different, the tips of the two vibrating claws 711 and 712 of the tuning fork structure 71 form a resonant motion, so as to generate large thrust motion tracks T1 and T2 in the reverse clock and clockwise direction, and as shown in fig. 6-1, the tips of the two vibrating claws 711 and 712 of the tuning fork structure 71 generate a reverse clock vibration track T1, so as to continuously push the contact end 551 of the power conducting member 55, so as to push the power conducting member 55 out and drive the autofocus movable portion 50 to advance in the same direction; in contrast, as shown in fig. 6-2, the tips of the two vibrating claws 711 and 712 of the tuning fork structure 71 generate a clockwise vibrating track T2, so as to continuously push the contact end 551 of the power conducting member 55 reversely, so as to push the power conducting member 55 into the moving part 50 to retract in the same direction, and the moving distance is regulated by the sensing magnet 56 (shown in fig. 3) and the autofocus driving circuit 80, which is not repeated in detail.
The key technology of the invention can drive at low voltage, and the experiment can reach the pushing aim at <3.3V, compared with the prior common driving voltage which is mostly about 8-15V, the invention is a design with extremely low current consumption, only 25mA is consumed in the operation process (the traditional VCM motor is not less than 100 mA) and no power is consumed when moving to the fixed point, so the large driving force of the invention can reach more than 3-5 times of the prior electromagnetic driving force, and the invention is characterized by the invention.
The invention has the following advantages in implementation under the careful design:
because the thrust of the automatic focusing adopts the matching of the piezoelectric ultrasonic motor driving unit and the automatic focusing driving circuit, the invention has the advantage of generating large thrust, is more than 3-5 times higher than the prior art, can easily carry more advanced high-pixel large lenses without losing power, and is the main advantage of the invention.
The invention uses voice coil motor as thrust force, while the suspension system uses upper spring and lower spring as support, to reduce the structure and save cost.
The above description is illustrative of the invention and is not restrictive, and it will be appreciated by those skilled in the art that many modifications, changes, or equivalents may be made without departing from the spirit and scope defined in the appended claims, for example: simple change of the tuning fork structure modeling, different materials for the ball, or simple change of the shape or the number of the magnet and the coil, but all fall into the protection scope of the invention.
Claims (5)
1. The piezoelectric spring piece type driving device of the miniature camera is characterized by at least comprising:
an upper cover with a central hole in the center;
a base, three continuous side walls and a door hole are arranged in the four side edges, and a window hole is arranged on each of the three continuous side walls;
the driving coil is provided with a first coil group, a second coil group and a third coil group which are arranged continuously and are respectively arranged in a U shape and are oppositely combined on three continuous side walls of the base; the hand vibration prevention driving coil is respectively provided with a Hall sensor in the X-axis and Y-axis directions;
an automatic focusing movable part which is provided with a middle hole and can be placed in the base, wherein three continuous side walls are arranged in the four sides of the automatic focusing movable part relative to the base, a front wall is opposite to a door hole of the base, and a side window hole is respectively arranged on the three continuous side walls of the automatic focusing movable part; the automatic focusing movable part is embedded with a power conducting piece on the front wall, one end of the power conducting piece is connected to the bottom of the automatic focusing movable part, and the other end of the power conducting piece extends out to form a contact end; an induction magnet is arranged on the front wall;
a hand vibration preventing movable part, which is provided with a middle hole in the center and is arranged in the automatic focusing movable part, and a driving magnet is respectively embedded in the side window holes of the automatic focusing movable part;
the piezoelectric ultrasonic motor driving unit comprises a tuning fork structure, two piezoelectric blocks and alternating voltage, wherein the two sides of one end of the tuning fork structure are oppositely provided with vibrating claws, and the two piezoelectric blocks are respectively arranged at the two sides of the tuning fork structure and are connected with the alternating voltage; the piezoelectric ultrasonic motor driving unit is arranged in front of the power transmission piece of the automatic focusing movable part, and the contact end of the power transmission piece is contacted with the vibration claw of the tuning fork structure; the automatic focusing driving circuit is also matched with the outer side of the piezoelectric ultrasonic motor driving unit;
the upper elastic sheet and the lower elastic sheet are respectively provided with four corner support handles, the support handles at the four corners are respectively extended to the center and provided with a bending part, and the tail end of the bending part is provided with an inner ring part; the upper spring plate and the lower spring plate can support the X-axis and Y-axis directions of the hand vibration prevention movable part to move, and can drive the repeated pushing of the Z-axis direction of the automatic focusing movable part by the piezoelectric ultrasonic motor driving unit.
2. The piezoelectric dome type driving apparatus of a miniature camera according to claim 1, wherein: the base is provided with a guide post on two sides of the door hole, and the front wall of the automatic focusing movable part is provided with a guide rail correspondingly.
3. The piezoelectric dome type driving apparatus of a miniature camera according to claim 1, wherein: the upper spring plate is connected between the support handles to form a square annular frame.
4. The piezoelectric dome type driving apparatus of a miniature camera according to claim 1, wherein: and a jointing protruding part with wider size is formed between the bending parts of the upper elastic sheet and the lower elastic sheet and the inner ring part.
5. The piezoelectric dome type driving apparatus of a miniature camera according to claim 1, wherein: the ratio of the depth to the width of the sections of the upper elastic sheet and the lower elastic sheet is between 1 and 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298076.9A CN114545582B (en) | 2020-11-18 | 2020-11-18 | Piezoelectric spring piece type driving device for miniature camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011298076.9A CN114545582B (en) | 2020-11-18 | 2020-11-18 | Piezoelectric spring piece type driving device for miniature camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114545582A CN114545582A (en) | 2022-05-27 |
| CN114545582B true CN114545582B (en) | 2023-11-14 |
Family
ID=81659974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011298076.9A Active CN114545582B (en) | 2020-11-18 | 2020-11-18 | Piezoelectric spring piece type driving device for miniature camera |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114545582B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077447A (en) * | 2003-08-29 | 2005-03-24 | Sunx Ltd | Focusing device, displacement sensor and confocal microscope |
| CN201477278U (en) * | 2009-08-03 | 2010-05-19 | 一品国际科技股份有限公司 | Piezoelectric autofocus lens module |
| JP2011203283A (en) * | 2010-03-24 | 2011-10-13 | Tdk Taiwan Corp | Camera-shake prevention structure of autofocus module of lens |
| JP2014149550A (en) * | 2014-05-12 | 2014-08-21 | Mitsumi Electric Co Ltd | Lens driving device, camera unit, and camera |
| CN105103429A (en) * | 2013-06-07 | 2015-11-25 | 佳能株式会社 | Linear ultrasonic motor and optical device equipped with same |
| WO2015176590A1 (en) * | 2014-05-20 | 2015-11-26 | 深圳市世尊科技有限公司 | Three-axis voice coil motor for controlling motion of lens |
| WO2015192786A1 (en) * | 2014-06-19 | 2015-12-23 | 深圳市世尊科技有限公司 | Focusing motor capable of realizing optical zooming and optical anti-vibration simultaneously |
| CN111030502A (en) * | 2019-12-24 | 2020-04-17 | 上海大学 | Tuning fork type double-foot linear piezoelectric motor |
| CN111435212A (en) * | 2019-01-15 | 2020-07-21 | 友华科技(香港)有限公司 | Anti-shake system for miniature camera |
| CN211352313U (en) * | 2020-01-10 | 2020-08-25 | 河源友华微机电科技有限公司 | Hand vibration prevention inclination correction platform of miniature camera module |
-
2020
- 2020-11-18 CN CN202011298076.9A patent/CN114545582B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005077447A (en) * | 2003-08-29 | 2005-03-24 | Sunx Ltd | Focusing device, displacement sensor and confocal microscope |
| CN201477278U (en) * | 2009-08-03 | 2010-05-19 | 一品国际科技股份有限公司 | Piezoelectric autofocus lens module |
| JP2011203283A (en) * | 2010-03-24 | 2011-10-13 | Tdk Taiwan Corp | Camera-shake prevention structure of autofocus module of lens |
| CN105103429A (en) * | 2013-06-07 | 2015-11-25 | 佳能株式会社 | Linear ultrasonic motor and optical device equipped with same |
| JP2014149550A (en) * | 2014-05-12 | 2014-08-21 | Mitsumi Electric Co Ltd | Lens driving device, camera unit, and camera |
| WO2015176590A1 (en) * | 2014-05-20 | 2015-11-26 | 深圳市世尊科技有限公司 | Three-axis voice coil motor for controlling motion of lens |
| WO2015192786A1 (en) * | 2014-06-19 | 2015-12-23 | 深圳市世尊科技有限公司 | Focusing motor capable of realizing optical zooming and optical anti-vibration simultaneously |
| CN111435212A (en) * | 2019-01-15 | 2020-07-21 | 友华科技(香港)有限公司 | Anti-shake system for miniature camera |
| CN111030502A (en) * | 2019-12-24 | 2020-04-17 | 上海大学 | Tuning fork type double-foot linear piezoelectric motor |
| CN211352313U (en) * | 2020-01-10 | 2020-08-25 | 河源友华微机电科技有限公司 | Hand vibration prevention inclination correction platform of miniature camera module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114545582A (en) | 2022-05-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11719997B2 (en) | Optical element driving mechanism | |
| KR101354775B1 (en) | Camera module | |
| US7986478B2 (en) | Lens drive device | |
| US10754170B2 (en) | Actuator and driving apparatus of camera module | |
| KR101421223B1 (en) | A camera module having the AF and the OIS function | |
| US11493727B2 (en) | Optical system | |
| KR101221316B1 (en) | Camera module with function of autofocus | |
| US20080292296A1 (en) | Vibration compensation for image capturing device | |
| KR101730268B1 (en) | Camera module | |
| US11860512B2 (en) | Camera module | |
| US20180364399A1 (en) | Camera device | |
| CN213750475U (en) | Optical element driving mechanism | |
| CN116088124A (en) | Lens driving device, camera module and optical instrument including the same | |
| US20220357554A1 (en) | Driving mechanism | |
| US11422357B2 (en) | Optical system | |
| US20150015954A1 (en) | Camera module | |
| US20120218650A1 (en) | Electromagnetic driving device | |
| CN114545582B (en) | Piezoelectric spring piece type driving device for miniature camera | |
| CN114518633B (en) | Piezoelectric low power consumption driving device for miniature camera | |
| KR100985665B1 (en) | Camera module | |
| CN108124097B (en) | Actuator and driving apparatus of camera module | |
| KR101599544B1 (en) | Camera lens assembly | |
| CN221860807U (en) | Lens driving device and camera module including the same | |
| CN114697485B (en) | Anti-shake module for mobile image sensor in miniature camera | |
| WO2024104177A1 (en) | Lens focusing driving apparatus, lens module, and electronic device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |