CN200972529Y - Micro-ultrasonic motor focusing structure for camera head of mobile phone - Google Patents
Micro-ultrasonic motor focusing structure for camera head of mobile phone Download PDFInfo
- Publication number
- CN200972529Y CN200972529Y CN 200620140368 CN200620140368U CN200972529Y CN 200972529 Y CN200972529 Y CN 200972529Y CN 200620140368 CN200620140368 CN 200620140368 CN 200620140368 U CN200620140368 U CN 200620140368U CN 200972529 Y CN200972529 Y CN 200972529Y
- Authority
- CN
- China
- Prior art keywords
- sleeve
- mobile phone
- ultrasonic motor
- micro
- lens
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model discloses a mobile phone video camera focusing mechanism driven by micro ultrasonic motor. Wherein the sleeve is fixed on the PCB board inside the mobile phone, and the ring stator of the micro ultrasonic motor is fix-joined with the outer cylindrical surface of the sleeve; the end side of the ring stator is glued with piezoelectric patches and flexible PCB boards, and the lead-out wires is connected with the driving module on the PCB board inside the mobile phone; the sleeve is also provided with a rotator, a planar bearing and a lens cover to form a pressing mechanism. The interior of the sleeve is provided in turn with a light sensor, a concave lens and a convex lens. The securing devices for the concave lens and the convex lens are respectively provided with movable pins, which are respectively inserted into the corresponding spiral grooves on the rotor and the movable pins are able to have axle sliding along the guide groove on the sleeve. The mechanism adopts the original low-speed big torque of the micro ultrasonic motor; the mechanism can be driven without a reducer; and the mechanism is automatically locked at power cut-offs. The shape design of the motor is beneficial to the focusing mechanism; the mechanism features in low noise, does not generate electromagnetic disturbances and also has such properties as high utilization rate of piezoelectric patches, high adjustment prevision and microminiaturization of n and fast response.
Description
Technical field
The utility model relates to the optical focusing system, is specifically related to a kind of micro-ultrasonic motor mobile phone quickcam image focusing structure.
Background technology
Ultrasonic motor (Ultrasonic Motor) is called for short USM, is a kind of new principle motor that utilizes ultrasonic vibration to drive.Different with traditional electromagnetic motor is: USM does not have magnetic pole and winding, do not rely on electromagnetic interaction to transmit energy, but utilize the inverse piezoelectric effect of piezoelectric ceramics, changing electric energy into ultrasonic vibration can (mechanical vibration frequency＞20KHz), then by contact and friction between the stator and rotor, change the vibration of alternation into the unidirectional rotation of rotor or rectilinear motion, realize the conversion of mechanical vibrational energy to rotor kinetic energy.It is a kind of electromechanical integrated product that relates to multidisciplinary intersections such as machinery, mechanics, acoustics, tribology, materialogy, power electronics and control theory.Micro-ultrasonic motor is the microminiaturization of ultrasonic motor, refers generally to the ultrasonic motor of motor diameter below 15mm, and owing to reasons such as physical dimension and processing technologys, micro-ultrasonic motor is realized than other motor is difficult.
By the drive principle of ultrasonic motor as can be known this motor have the bearing accuracy height; Low-speed and large-torque; Need not reducing gear, can directly drive; Cut off self-lock; Simple in structure, the motor shaped design has very big degree of freedom; Noise is little; Do not produce characteristics such as electromagnetic interference (EMI).Because ultrasonic motor has above-mentioned inequality with electromagnetic machine, and specific application and occasion are arranged.Canon Inc. formally was applied in the circular ring type ultrasonic motor in the automatic focusing system of camera in 1987.In camera automatic focusing structure in the past, electromagnetic motor is installed in the camera rear side main body, drives camera lens by a series of gear trains such as reducing gears.Because influences such as kinematic train gap and inertia, the response time surpasses 100ms usually, and positional precision is lower.And the hollow structure of circular ring type ultrasonic motor has just in time adapted to the optical texture requirement of camera lens, be installed in the peripheral part of camera lens, camera lens is directly driven, no intermediate transfer, thereby (generally in 10ms) accelerated in response, bearing accuracy improves, and satisfied the requirement of the good controlled and low noise of camera simultaneously.In June, 2005, a kind of loop-shaped ultrasound motor is invented by Olympus Co., Ltd, and the assembling back is as the drive source of lens barrel.Its structure is made up of the mechanism of stator, ring-type rotor, a pair of oscillator and support oscillator.More than two kinds of structures bigger because of volume, all be not suitable for being used in the mobile phone quickcam image focusing structure.
Summary of the invention
The purpose of this utility model provides a kind of mobile phone quickcam image focusing structure of using micro-ultrasonic motor.
The technical scheme that its technical matters that solves the utility model adopts is: the leg of sleeve one end passes in the mobile phone crooked left-hand thread behind the pilot hole on the pcb board, sleeve is fixed in the mobile phone on the pcb board, the ring-type stator of micro-ultrasonic motor and sleeve external cylindrical surface wringing fit or splicing are fixing, and locate with the stator positioning step on the sleeve; The ring-type stator faces of the micro-ultrasonic motor of an end of pcb board is gluedd joint in the close mobile phone of sleeve piezoelectric patches, the piezoelectric patches another side glueds joint flexible printed circuit board, and the micro-ultrasonic motor special use driver module in the extension line on the flexible printed circuit board and the mobile phone on the pcb board is connected; Rotor, surface bearing and lens cap also are housed on the sleeve, one end of rotor, surface bearing and lens cap are formed hold-down mechanism, lens cap is connected with bush whorl, end near pcb board in the mobile phone in sleeve outwards is equipped with optical sensor successively, be installed in the concavees lens in the concavees lens stationary installation and be installed in convex lens in the convex lens stationary installation, concavees lens stationary installation and convex lens stationary installation are inserted with moving pin respectively, moving pin is inserted in respectively on the rotor in opposite directions the helicla flute, and moving pin can endwisely slip along gathering sill on the sleeve.
Described hold-down mechanism is: have zanjon at the rotor near surface bearing one end, lens cap and sleeve are pressed on rotor end-face by threaded engagement through surface bearing.
In conjunction with the micro-ultrasonic motor technology, adopt suitable structural design, miniature ring-type ultrasonic motor is applied in the mobile lens focusing system, to realize the optical focusing of mobile lens.
The useful effect that the utlity model has is:
Ultrasonic motor eyeglass or lens barrel in the camera automatic focusing system have obtained successful application on driving, but do not use the annular ultrasonic motor as yet in the lens construction of mobile phone.Its reason is that the mobile lens structure is less, and large-sized relatively camera lens is difficult to be realized.This structure adopts the original low-speed and large-torque of micro-ultrasonic motor; Need not reducing gear, can directly drive; Cut off self-lock; Simple in structure, the motor shaped design helps focusing structure; Noise is little; Do not produce outside the characteristics such as electromagnetic interference (EMI), also have piezoelectric patches utilization factor height, degree of regulation is high and microminiaturized, responds characteristics such as fast.
Description of drawings
Fig. 1 is micro-ultrasonic motor mobile phone quickcam image focusing structure vertical section structure figure;
Fig. 2 is rotor and piezoelectric bar sectional view;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is rotor profiles figure;
Fig. 5 is flexible printed circuit board PCB figure.
Among Fig. 1: 1, pcb board in the mobile phone, 2, sleeve, 3 optical sensors, 4 concavees lens, 5 concavees lens stationary installations, 6, convex lens, 7 convex lens stationary installations, 8, moving pin, 9, stator, 10, piezoelectric patches, 11, flexible printed circuit board, 12, rotor, 13, hold-down mechanism, 14 lens caps, 15 surface bearings.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, according to the requirement of mobile phone autozoom lens construction, adopt miniature travelling-wave type ring-type ultrasonic motor to drive eyeglass and move, pass through light in the middle of the camera lens.In micro-ultrasonic motor mobile phone camera lens zoom mechanism structure, sleeve 2 is skeletons of entire mechanism, plays fixing and positioning action, and its wall thickness is thin (0.5mm), needs to adopt intensity material preferably, disposable drawing.Sleeve 2 one ends are legs, and close leg has the positioning step and the stator positioning step of pcb board 1 in the mobile phone, and the middle part has the gathering sill that moves vertically for moving pin 8, and the other end has external thread.The leg of sleeve 2 passes in the mobile phone crooked left-hand thread behind the pilot hole on the pcb board 1, and mobile lens is fixed in the mobile phone on the pcb board 1.Arrange the optical sensor 3 that is connected with other related devices in pcb board 1 surface in mobile phone, sleeve 2 inwalls institute limited range.Near optical sensor 3 one ends concavees lens 4 are arranged in sleeve 2, concavees lens 4 are installed in the concavees lens stationary installation 5.Be inserted with moving pin 8 on the concavees lens stationary installation 5, can drive lower edge sleeve 2 inwalls at it and endwisely slip.At sleeve 2 other ends convex lens 6 are arranged, convex lens 6 are installed in the convex lens stationary installation 7.Convex lens stationary installation 7 also can drive the lower edge sleeve lining at moving pin 8 as concavees lens stationary installation 5 and endwisely slip.The ring-type stator 9 of micro-ultrasonic motor is fixing with sleeve 2 usefulness wringing fits or splicing, and locatees with the stator positioning step on the sleeve 2; Piezoelectric patches 10 one side is gluedd joint with glue with micro-ultrasonic motor stator 9 metallic objects, and another side is done extension line with flexible printed circuit board 11, and flexible printed circuit board 11 is connected with micro-ultrasonic motor special use driver module on the interior pcb board 1 of mobile phone.As shown in Figure 5, special-purpose driver module two-phase differs the two-phase input pin 11.1 of alternating voltage by flexible printed circuit board 11 of 90 ° ultrasonic frequency, 11.4 and ground wire 11.2 is applied to piezoelectric patches 10, make that corresponding two-phase produces the stationary wave vibration that 90 ° of spaces of phase phasic difference differ 1/4 wavelength respectively on the piezoelectric patches 10, two stationary wave vibration synthesize capable ripple vibration on piezoelectric patches 10.Vibration transfer makes stator 9 surperficial particles produce elliptic motion to stator 9 surfaces.The pin 11.3 of flexible printed circuit board is as reserving feedback pin.Stator 9 contacts with rotor 12.Lens cap 14 has internal thread, cooperates with the external thread of sleeve 2.The rotating mirror skull applies axial pretightning force by hold-down mechanism 13 to rotor 12, makes to have precompression between rotor.The circumferential friction force that the elliptic motion of stator 9 surperficial particles produces drives rotor 12 and does circumferential revolution.Have rectangle helicla flute in opposite directions on rotor 12 walls.Moving pin 8 one ends stretch in the helicla flute, when rotor 12 circumferentially during revolution, drive moving pin 8 and move axially along the gathering sill on the sleeve wall, and then drive optical mirror slip group work and move axially in opposite directions accordingly, have realized the focusing function of micro-ultrasonic motor.
The design parameter of micro-ultrasonic motor and control mode.According to the mobile phone quickcam image focusing structure requirement, stator 9 diameters of ultrasonic motor are about about φ 10mm, and generally the mechanical property parameter of this situation motor is about: the several mNm of stalling torque, idler revolutions are hundreds of r/min.Because the rotating speed of motor is very fast, for preventing overshoot, in the time of can establishing the each button of mobile phone key, make the circuit turn-on certain proportion time of realizing on the driving circuit, than the time decimal of actual key contact doubly, control the angle of revolution that each button produces thus, till focusing is clear.
The stator 9 of micro-ultrasonic motor is because nearer apart from pcb board in the mobile phone 1, and thinner thickness is therefore less to the influence of mobile phone size design, can suitably design than major diameter.So both can satisfy the handset size requirement, again can bonding larger-diameter piezoelectric patches 10.Both reduce the difficulty that the small size piezoelectric patches is made, improved the output torque and the utilization ratio of micro-ultrasonic motor again.The rotor 12 of micro-ultrasonic motor is longer dimension to axial, and therefore except that two positioning ends, the inwall remainder is suitably emptied, and reduces owing to grow size and machining, the circumferential steering resistance square that reasons such as assembling cause relatively.
Micro-ultrasonic motor compresses the compressing structure that adopts weak link equivalent spring version, opens zanjon near surface bearing 15 ends on rotor 12 structures, and lens cap 14 and sleeve 2 are exerted pressure to surface bearing by threaded engagement.The effect of spring is played in the deformation of opening rotor groove wall generation after compressing of zanjon end naturally, and the snap-in force between rotor is provided.
Mechanical property, life-span and the reliability of travel incognito wave mode ultrasonic motor is directly relevant with friction material and technique for sticking.Friction material adopts two kinds of methods: the one, and technologies such as stator surface shot-peening, nitrogenize or plastic-blasting; The 2nd, adopt the sticking section bar material (friction factor than laminated material is big) that is coated with, after solidifying, shape, adjust the thickness of friction material again through turning processing.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (2)
1. micro-ultrasonic motor mobile phone quickcam image focusing structure, it is characterized in that: the leg of sleeve (2) one ends passes in the mobile phone crooked left-hand thread behind the pilot hole on the pcb board (1), sleeve (2) is fixed on the interior pcb board (1) of mobile phone, the ring-type stator (9) of micro-ultrasonic motor is fixing with sleeve (2) external cylindrical surface wringing fit or splicing, and locatees with the stator positioning step on the sleeve (2); Ring-type stator (9) end face of the micro-ultrasonic motor of an end of pcb board (1) glueds joint in the close mobile phone of sleeve (2) piezoelectric patches (10), piezoelectric patches (10) another side glueds joint flexible printed circuit board (11), and the micro-ultrasonic motor special use driver module in the extension line on the flexible printed circuit board (11) and the mobile phone on the pcb board (1) is connected; Rotor (12) also is housed on the sleeve (2), surface bearing (15) and lens cap (14), one end of rotor (12), surface bearing (15) and lens cap (14) are formed hold-down mechanism (13), lens cap (14) is threaded with sleeve (2), end near pcb board (1) in the mobile phone in sleeve (2) outwards is equipped with optical sensor (3) successively, be installed in the concavees lens (4) in the concavees lens stationary installation (5) and be installed in the interior convex lens (6) of convex lens stationary installation (7), concavees lens stationary installation (5) and convex lens stationary installation (7) are inserted with moving pin (8) respectively, moving pin is inserted in respectively on the rotor in opposite directions the helicla flute, and moving pin can be in axial sliding along gathering sill on the sleeve.
2. a kind of micro-ultrasonic motor mobile phone quickcam image focusing structure according to claim 1, it is characterized in that: described hold-down mechanism (13) is: have zanjon at the rotor (12) near surface bearing (15) one ends, lens cap (14) is pressed on rotor (12) end face by threaded engagement through surface bearing (15) with sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620140368 CN200972529Y (en) | 2006-11-27 | 2006-11-27 | Micro-ultrasonic motor focusing structure for camera head of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620140368 CN200972529Y (en) | 2006-11-27 | 2006-11-27 | Micro-ultrasonic motor focusing structure for camera head of mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200972529Y true CN200972529Y (en) | 2007-11-07 |
Family
ID=38883784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620140368 Expired - Lifetime CN200972529Y (en) | 2006-11-27 | 2006-11-27 | Micro-ultrasonic motor focusing structure for camera head of mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200972529Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437329C (en) * | 2006-09-18 | 2008-11-26 | 浙江大学 | Micro-ultrasonic motor mobile phone quickcam image focusing structure |
| CN109039147A (en) * | 2018-08-31 | 2018-12-18 | 洛阳同铸电子科技有限公司 | A kind of rotary-type linear ultrasonic electric machine driving focusing, zoom lens |
| CN109073855A (en) * | 2016-04-28 | 2018-12-21 | 富士胶片株式会社 | Optical devices and photographic device |
| CN111722343A (en) * | 2019-03-20 | 2020-09-29 | 和硕联合科技股份有限公司 | Waterproof device for lens |
| CN115412675A (en) * | 2022-08-31 | 2022-11-29 | 维沃移动通信有限公司 | Camera module and electronic equipment |
-
2006
- 2006-11-27 CN CN 200620140368 patent/CN200972529Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437329C (en) * | 2006-09-18 | 2008-11-26 | 浙江大学 | Micro-ultrasonic motor mobile phone quickcam image focusing structure |
| CN109073855A (en) * | 2016-04-28 | 2018-12-21 | 富士胶片株式会社 | Optical devices and photographic device |
| US10895712B2 (en) | 2016-04-28 | 2021-01-19 | Fujifilm Corporation | Optical device and imaging apparatus with position sensors and coil motors |
| CN109039147A (en) * | 2018-08-31 | 2018-12-18 | 洛阳同铸电子科技有限公司 | A kind of rotary-type linear ultrasonic electric machine driving focusing, zoom lens |
| CN111722343A (en) * | 2019-03-20 | 2020-09-29 | 和硕联合科技股份有限公司 | Waterproof device for lens |
| CN111722343B (en) * | 2019-03-20 | 2022-05-10 | 和硕联合科技股份有限公司 | Waterproof device for lens |
| CN115412675A (en) * | 2022-08-31 | 2022-11-29 | 维沃移动通信有限公司 | Camera module and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1959511B1 (en) | A thread driven polyhedron ultrasonic motor | |
| CN200972529Y (en) | Micro-ultrasonic motor focusing structure for camera head of mobile phone | |
| US7587135B2 (en) | Auto-focus optical lens module | |
| CN1964175B (en) | A screw thread driving polyhedral supersonic micro motor with pre-pressure mechanism | |
| CN1873455A (en) | Integrated focusing/zooming system of optical apparatus | |
| CN101425762B (en) | Ultrasonic straight line motor and automatic focusing/zooming system driven thereby | |
| JP4214268B2 (en) | Lens module | |
| CN201075845Y (en) | Screwed cap type ultrasound electric machine | |
| CN100437329C (en) | Micro-ultrasonic motor mobile phone quickcam image focusing structure | |
| CN100539230C (en) | The mechanism that comprises the ultrasound waveguide screw motor | |
| CN101364775B (en) | Flat dual-stator thread driving ultrasonic minimized motor having thread pair pretensioning | |
| CN201398155Y (en) | Linear piezoelectric motor | |
| CN102158124B (en) | Vibration wave motor, lens barrel and camera | |
| CN2886610Y (en) | Focusing mechanism for cam of mobile phone | |
| CN107947630B (en) | Hollow ultrasonic motor with outer ring output | |
| CN208597035U (en) | A kind of rotary-type linear ultrasonic electric machine driving focusing, zoom lens | |
| TWI555323B (en) | Hybrid-type piezoelectric motor | |
| CN112821800A (en) | Clamping type piezoelectric stepping motor based on ultrasonic vibration antifriction phenomenon and electric excitation method | |
| CN114624845A (en) | Camera module and digital device | |
| JP3170999B2 (en) | Drive | |
| Zhou et al. | Integrated lens auto-focus system driven by a nut-type ultrosonic motor (USM) | |
| JP2014150713A (en) | Linear drive unit, camera device and electronic apparatus | |
| CN112886861B (en) | Double-layer ring piezoelectric rotary driver | |
| CN214315090U (en) | Double-layer ring piezoelectric rotary driver | |
| KR100904861B1 (en) | Turning piezoelectric motor using a cam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081126 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |