CN110456474A - The lens driver and camera apparatus of auto-focusing piezoelectricity USM - Google Patents
The lens driver and camera apparatus of auto-focusing piezoelectricity USM Download PDFInfo
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- CN110456474A CN110456474A CN201910741179.9A CN201910741179A CN110456474A CN 110456474 A CN110456474 A CN 110456474A CN 201910741179 A CN201910741179 A CN 201910741179A CN 110456474 A CN110456474 A CN 110456474A
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- piezoelectricity
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- guiding ball
- ball component
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- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000003384 imaging method Methods 0.000 claims abstract description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 5
- 239000000758 substrate Substances 0.000 description 13
- 239000000919 ceramic Substances 0.000 description 7
- 229920002379 silicone rubber Polymers 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization 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
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
Present disclose provides a kind of auto-focusing lens drivers of piezoelectricity USM, comprising: lens support, for keeping at least one imaging lens；The focal position that the portion piezoelectricity USM, including the first portion piezoelectricity USM and the second portion piezoelectricity USM, the first portion piezoelectricity USM and the second portion piezoelectricity USM are used to that lens support to be made to be moved to lens in the optical axis direction of lens；And guiding ball portion, including multiple guiding ball components, for receiving the pressure from the first portion piezoelectricity USM and the second portion piezoelectricity USM, and keep smooth movement of the lens support in optical axis direction, wherein, at two adjacent corners of the diagonal that the first portion piezoelectricity USM and the second portion piezoelectricity USM are separately positioned on lens support, diagonal line is located at the optical axis center point in the horizontal plane vertical with optical axis direction and passing through lens, and another corner portion of the lens support different from two corners of lens support is arranged in guiding ball portion.The disclosure additionally provides a kind of camera apparatus.
Description
Technical field
This disclosure relates to the lens driver and camera apparatus of a kind of auto-focusing piezoelectricity USM.
Background technique
Currently, it is equipped with camera-enabled in the electronic equipment or individual mobile terminal of mobile phone etc.,
In order to make camera realize the functions such as autozoom, optical zoom or optical image stabilization, the lens that can drive lens are used
Driving device is required.Lens driver drives lens using the driving force that actuator generates, to change lens
Distance, to realize the functions such as zoom or focusing.
But in the prior art, it needs to solve how to carry out direction controlling and holding to the power for being applied to lens support
Etc. the problem of, be furthermore also required to solve how to provide enough power to lens support and correctly control lens height and
The problem of various aspects such as gradient.
Summary of the invention
At least one of in order to solve the above-mentioned technical problem, present disclose provides a kind of lens drivers and camera to fill
It sets.
According to one aspect of the disclosure, the lens driver of a kind of auto-focusing piezoelectricity USM, comprising:
Lens support, the lens support is for keeping at least one imaging lens；
The portion piezoelectricity USM, including the first portion piezoelectricity USM and the second portion piezoelectricity USM, the portion the first piezoelectricity USM and the second pressure
The focal position that the electric portion USM is used to that the lens support to be made to be moved to the lens in the optical axis direction of the lens；
And
It is oriented to ball portion, including multiple guiding ball components, the multiple guiding ball component is for receiving from described
The pressure in the first portion piezoelectricity USM and the second portion piezoelectricity USM, and keep the lens support flat in the optical axis direction
Sliding is dynamic,
Wherein, the portion the first piezoelectricity USM and the second portion piezoelectricity USM are separately positioned on the diagonal line of the lens support
At two adjacent corners in direction, the diagonal line is located in the horizontal plane vertical with the optical axis direction and by described
The lens branch different from two corners of the lens support is arranged in the optical axis center point of mirror, the guiding ball portion
Another corner portion of support part.
According at least one embodiment of the disclosure, the portion the first piezoelectricity USM and the second portion piezoelectricity USM are to described
The force direction of mirror support portion and the diagonal line are at 45 ° and towards the guiding ball portion.
According at least one embodiment of the disclosure, the guiding ball portion includes the first guiding ball component, second
It is oriented to ball component and third is oriented to ball component,
The first guiding ball component is located at the force direction in the first portion piezoelectricity USM and the force in the second portion piezoelectricity USM
Near the intersection position in direction, and
It is attached that the second guiding ball component is located at the first guiding ball component in the force direction in the first portion piezoelectricity USM
Closely, the third guiding ball component is located near the first guiding ball component in the force direction in the second portion piezoelectricity USM.
It further include position detecting device according at least one embodiment of the disclosure, the position detecting device includes
First position detecting device and second position detecting device control described by the detection signal of first position detecting device
One portion piezoelectricity USM controls the portion the second piezoelectricity USM by the detection signal of second position detecting device, so that described
Lens support is moved to the focal position of the lens.
According at least one embodiment of the disclosure, the first position detecting device is located at the first piezoelectricity USM
Near portion and the second position detecting device is located near the portion the second piezoelectricity USM.
According at least one embodiment of the disclosure, the first position detecting device and second position detecting device point
Not Bao Kuo permanent magnet and the Hall sensor that is oppositely arranged with the permanent magnet, the permanent magnet is located at the lens support
On side wall.
It further include pedestal according at least one embodiment of the disclosure, the pedestal includes towards the lens supports
The sidewall portion that portion extends,
It is at least offered on the side wall of the lens support and accommodates the first guiding the ball component, the second orienting roll
The guide groove of pearl component and third guiding ball component, the first guiding ball component, the second guiding ball component and third
Guiding ball component contacted respectively with the guide groove with the sidewall portion, so as to when the lens support move when, it is described
First guiding ball component, the second guiding ball component and third guiding ball component are rolled.
According at least one embodiment of the disclosure, it is described first guiding ball component, second guiding ball component and
Third guiding ball component respectively includes three balls, and three balls are arranged along the optical axis direction, and upper spheres
It is identical as the diameter of lower spheres, and it is greater than or equal to the diameter of middle part ball.
According at least one embodiment of the disclosure, the centre of sphere and first piezoelectricity of the first guiding ball component
The distance of the center line in the portion USM is that the third is oriented to ball component at a distance from the center line in the portion the first piezoelectricity USM
1.2 to 1.5 times and it is described first guiding ball component the centre of sphere be at a distance from the center line in the portion the second piezoelectricity USM
Described second is oriented to 1.2 to 1.5 times of ball component at a distance from the center line in the portion the second piezoelectricity USM.
According to the another aspect of the disclosure, a kind of camera apparatus, comprising:
Lens driver as described above；
At least one lens being fixed in the lens support；And
Receive the imaging sensor of the light by least one lens.
Detailed description of the invention
Attached drawing shows the illustrative embodiments of the disclosure, and it is bright together for explaining the principles of this disclosure,
Which includes these attached drawings to provide further understanding of the disclosure, and attached drawing is included in the description and constitutes this
Part of specification.
Fig. 1 is the exploded perspective schematic diagram of lens driver in accordance with one embodiment of the present disclosure.
Fig. 2 is the exploded perspective schematic diagram of lens driver in accordance with one embodiment of the present disclosure.
Fig. 3 is the sectional view of lens driver in accordance with one embodiment of the present disclosure.
Fig. 4 is the schematic diagram of piezoelectric actuator in accordance with one embodiment of the present disclosure.
Fig. 5 is the partial enlarged view according to Fig. 3.
Specific embodiment
The disclosure is described in further detail with embodiment with reference to the accompanying drawing.It is understood that this place
The specific embodiment of description is only used for explaining related content, rather than the restriction to the disclosure.It also should be noted that being
Convenient for description, part relevant to the disclosure is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the disclosure can
To be combined with each other.The technical solution of the disclosure is described in detail below with reference to the accompanying drawings and in conjunction with embodiment.
Unless otherwise stated, illustrative embodiments/the embodiment shown, which will be understood as providing, to be practiced
The example feature of the various details of some modes of the middle technical concept for implementing the disclosure.Therefore, unless otherwise stated,
In the case where not departing from the technical concept of the disclosure, the feature of various embodiment/embodiments can additionally organize splitting or integrating
From, exchange and/or rearrange.
It is commonly used in being apparent from the boundary between adjacent component using intersecting hachure and/or shade in the accompanying drawings.Such as
This, unless explanation, otherwise specific material, the material to component are not conveyed or are indicated in the presence or absence of intersecting hachure or shade
Matter, size, ratio, any other characteristic of the general character between the component that shows and/or component, attribute, property etc. it is any partially
Good or requirement.In addition, in the accompanying drawings, for clear and/or descriptive purpose, the size of component can be exaggerated and with respect to ruler
It is very little.It, can be suitable to execute specific technique to be different from described sequence when differently exemplary embodiment can be implemented
Sequence.For example, can be performed simultaneously substantially or execute two techniques continuously described with the sequence opposite with described sequence.
In addition, same appended drawing reference indicates same component.
When a component be referred to as " " another component "upper" or " on ", " being connected to " or " being integrated to " another component
When, the component can directly on another component, be directly connected to or be bonded directly to another component, or can be with
There are intermediate members.However, when component is referred to as " directly existing " another component "upper", " being directly connected to " or " being bonded directly to "
When another component, intermediate member is not present.For this purpose, term " connection " can refer to physical connection, electrical connection etc., and have or
Without intermediate member.
For descriptive purpose, the disclosure can be used such as " ... under ", " in ... lower section ", " ... under ",
"lower", " in ... top ", "upper", " ... on " space of " higher " and " side (for example, such as in " side wall ") "
Relative terms, thus to describe the relationship of a component and another (other) components as shown in figures.In addition to being retouched in attached drawing
Except the orientation drawn, spatially relative term alsos attempt to the different direction comprising equipment in use, operation and/or manufacture.For example,
If the equipment in attached drawing is reversed, the component for being described as " " other components or feature " below " or " under " will be subsequent
It is positioned as " " described other components or feature " top ".Therefore, exemplary term " in ... lower section " may include " on
Side " and " lower section " two kinds of orientation.In addition, in addition equipment can be positioned (for example, being rotated by 90 ° or at other orientation), such as
This, is interpreted accordingly space used herein and describes language relatively.
Supersonic motor (Ultrasonic Motor, abridge USM) is using the mechanical oscillation of ultrasonic frequency domain as driving source
Driver.The exciting element of supersonic motor is piezoelectric ceramics, therefore also referred to as piezo-electric motor.
Fig. 1 and 2 shows the exploded perspective view of lens driver in accordance with one embodiment of the present disclosure.Wherein,
Fig. 1 and Fig. 2 is the exploded perspective view shown in different angle.
As shown in Figure 1, lens driver 100 may include shell 110, lens support 120 and pedestal 130.
Pedestal 130 may include bottom 131 and sidewall portion 132.Sidewall portion 132 can rise in the peripheral position of bottom 131
Extend to upward direction shown in Fig. 1 or 2, to form the space for accommodating lens support 120.
In the space that lens support 120 is configured at the bottom 131 of pedestal 130 and sidewall portion 132 is formed, and have
Empty portion 121, at least one imaging lens are arranged in hollow portion 121.By driving force, lens support 120 can be at least
It is moved on the optical axis direction of lens.
Shell 110 can be covered to the periphery wall of the upside of lens support 120 and sidewall portion 132.
Fig. 3 shows the sectional view of lens driver in accordance with one embodiment of the present disclosure.Below with reference to figure
1-3 is described in detail embodiment of the present disclosure.
Lens driver 100 can also include the portion piezoelectricity USM 140.The portion piezoelectricity USM 140 may include the first piezoelectricity
The portion USM 141 and the second portion piezoelectricity USM 142.
First portion piezoelectricity USM 141 mainly includes substrate 1411, piezoelectric element 1412 and silicon rubber 1413.Substrate 1411 can
Think ceramic substrate, such as can be supported by SiC or zirconium oxide etc., substrate 1411 can be with lens support 120 integrally
It is formed.Silicon rubber 1413 can be set in the sidewall portion 132 of pedestal 130.
Second portion piezoelectricity USM 142 mainly includes substrate 1421, piezoelectric element 1422 and silicon rubber 1423.Substrate 1421 can
Think ceramic substrate, such as can be supported by SiC or zirconium oxide etc., substrate 1421 can be with lens support 120 integrally
It is formed.Silicon rubber 1423 can be set in the sidewall portion 132 of pedestal 130.
As shown in figure 4, signature can be pushed away in lens branch by piezoelectric element 1412, the silicon rubber 1413,1423 of 1422 behinds
Ceramic substrate 1411,1421 on support part 120.Piezoelectric element 1412,1422 is divided into four regions, when energization A's
When being powered in direction, (transverse direction displacement) is conjugated according to d31, upper and lower two charge pumps 1414,1424 carry out two dotted arrows
Shown in act, interacted with ceramic substrate accordingly so that lens support 120 moves up, when logical in the direction of energization B
When electric, upper and lower two charge pumps 1414,1424 act shown in two realization arrows, are interacted accordingly with ceramic substrate
So that lens support 120 moves down.
First portion 141 piezoelectricity USM and the second portion piezoelectricity USM 142 are for making lens supports in the optical axis direction of lens
Portion 120 is moved to the focal position of lens.
Lens driver 100 can also include guiding ball portion 150, may include multiple guiding ball components, more
A guiding ball component is kept for receiving the pressure from the first portion 141 piezoelectricity USM and the second portion piezoelectricity USM 142
Smooth movement of the lens support 120 in optical axis direction G.
First portion 141 piezoelectricity USM and the second portion piezoelectricity USM 142 are separately positioned on the diagonal line side D of lens support 120
To two adjacent corners at, diagonal line D be located in the horizontal plane vertical with optical axis direction G and pass through lens optical axis in
Another corner portion of the lens support different from two corners of lens support is arranged in heart point C, guiding ball portion 150
(as shown in Fig. 3).
The force direction and diagonal line D of first portion 141 piezoelectricity USM and the second portion piezoelectricity USM 142 to lens support 120
It is at 45 ° and towards guiding ball portion 150.
Through the above configuration, the portion piezoelectricity USM can provide enough driving forces (thrust), and can disperse to be applied to
The pressure of mirror support portion can prevent lens support from carrying out the inclination on horizontal plane in this way.And by such as upper type
Two portions piezoelectricity USM (90 °) are set, two portion piezoelectricity USM movements can be offset in this way and the mutual vibration of formation, to prevent
The unnecessary vibration of lens support and lens.
Two portions piezoelectricity USM are set by such as upper type, the movement of itself in the portion each piezoelectricity USM/turn can be limited
Dynamic freedom degree, in this way, can X, Y, Z, θ x, θ y, θ z 6DOF in, only the freedom degree of Z axis is retained, and other 5
A freedom degree can be completely restricted.It may insure that lens support and lens only move in optical axis direction in this way, and
It other directions, in this way can be to avoid inclined generation then without movement.
Being oriented to ball portion 150 includes that the first guiding ball component 1510, second is oriented to ball component 1520 and third guiding
Ball component 1530.
First guiding ball component 1510 is located at force direction L1 and second portion piezoelectricity USM in the first portion piezoelectricity USM 141
Near the intersection position of 142 force direction L2.Although showing near intersection position in Fig. 3, it be can be set
In point of intersection.
Second guiding ball component 1520 is located at the first guiding ball in the force direction L1 in the first portion piezoelectricity USM 141
Near component 1510.Such as shown in figure 3, the second guiding ball component 1520 can be located at the first portion piezoelectricity USM 141 and the
One lateral position of the lens support 120 between one guiding ball component 1510.
Third guiding ball component 1530 is located at the first guiding ball in the force direction L2 in the second portion piezoelectricity USM 142
Near component 1510.Such as shown in figure 3, third guiding ball component 1530 can be located at the second portion piezoelectricity USM 142 and first
It is oriented to a lateral position of the lens support 120 between ball component 1510.
Receiving the first guiding ball component 1510, the second orienting roll are at least offered on the side wall of lens support 120
The guide groove of pearl component 1520 and third guiding ball component 1530, the first guiding ball component 1510, second are oriented to ball structure
Part 1520 and third guiding ball component 1530 are contacted with guide groove with sidewall portion respectively, so as to when the movement of lens support 120
When, the first guiding ball component 1510, second is oriented to ball component 1520 and third guiding ball component 1530 is rolled.
As shown in Fig. 2, the first guiding ball component 1510 may include three balls, three balls are arranged along optical axis direction
Column, and upper spheres are identical as the diameter of lower spheres, and are greater than or equal to the diameter of middle part ball.Second guiding ball structure
Part 1520 may include three balls, and three balls are arranged along optical axis direction, and the diameter phase of upper spheres and lower spheres
Together, and more than or equal to the diameter of middle part ball.It may include three balls, three ball edges that third, which is oriented to ball component 1530,
Optical axis direction arrangement, and upper spheres are identical as the diameter of lower spheres, and are greater than or equal to the diameter of middle part ball.
As shown in figure 3, the first guiding ball component 1510 is main ball component, and the second guiding ball component 1520 and the
Three guiding ball components 1530 are auxiliary ball component, and the second guiding ball component 1520 and third are oriented to 1530 phase of ball component
First guiding ball component 1510 is set to 90 degrees.
According to the above aspect, the first guiding ball component is arranged in the corner portion of lens support, can be made because thoroughly
Mirror support portion is minimized in the light shaft offset that optical axis direction is mobile to be caused.Additionally by two groups of auxiliary ball components are increased, press
The drive part in the electric portion USM is arranged convex portion on the piezoelectric element and is arranged in the drive surface of lens support
Contact and pressure between ceramic wafer realize that homogenization, the driving force of such piezoelectricity USM device can accurately be transmitted to lens
Support portion.
Fig. 5 shows the partial enlarged view of Fig. 3.The centre of sphere of first guiding ball component 1510 and the first portion piezoelectricity USM 141
Center line LC1 (passing through the extended line of the center in the first portion piezoelectricity USM 141) distance d3 be third be oriented to ball component
1530 are oriented to the ball of ball component 1510 with 1.2 to 1.5 times of first of the center line LC1 distance d4 in the first portion piezoelectricity USM
Center line LC2 distance d1 of the heart with the second portion piezoelectricity USM 142 is the second guiding ball component 1520 and the second portion piezoelectricity USM
1.2 to 1.5 times of the distance d2 of 142 center line LC2.For example, d2, d4 can be 0.7 when d1, d3 can be 0.9.
By the setting of above-mentioned distance, the power that can prevent the portion piezoelectricity USM from being applied concentrates on the first guiding ball component
The case where generation power can be dispersed by two auxiliary ball components and by the setting of above-mentioned distance.
According to the further embodiment of the disclosure, lens driver 100 can also include position detecting device 160,
Position detecting device includes first position detecting device 161 and second position detecting device 162, passes through first position detecting device
161 detection signal controls the first portion piezoelectricity USM 141, controls by the detection signal of second position detecting device 162
Two portions piezoelectricity USM 142, so that lens support 120 is moved to the focal position of lens.
In the preferred embodiment of the disclosure, first position detecting device 161 is located near the first portion piezoelectricity USM 141,
And second position detecting device 162 is located near the second portion piezoelectricity USM 142.
First position detecting device 161 includes permanent magnet 1611 and the Hall sensor 1612 being oppositely arranged with permanent magnet,
Permanent magnet 1611 is located on the side wall of lens support 120.
Second position detecting device 162 includes permanent magnet 1621 and the Hall sensor 1622 being oppositely arranged with permanent magnet,
Permanent magnet 1621 is located on the side wall of lens support 120.
It realizes the control in two portions piezoelectricity USM respectively by two position detecting devices, passes through two position inspections in this way
When surveying device and detecting that the corresponding lens support position (height) in two portions piezoelectricity USM is different, can according to detect signal come
The control in the portion piezoelectricity USM is adjusted.To prevent the offset in optical axis direction.It in this way can be by lens support and lens
In the minimization of tilt of optical axis direction, so as to improve movable inclined.
According to the disclosure, Hall sensor and piezoelectric element pass through flexible circuit board 170 and are connected to external circuit, thus real
The control in the existing portion piezoelectricity USM.
The specific control and the connection of flexible circuit board and external circuit of piezoelectric element belong to any technique commonly known hand
Section, repeats no more in the disclosure.
In summary, according to embodiment of the present disclosure, biggish driving force can be provided by the portion piezoelectricity USM, and
Real-time detection position can be come by using the position detecting device being arranged near the portion piezoelectricity USM, the portion piezoelectricity USM is controlled
System, can accurately control height and gradient of all lens etc. in this way.
According to the disclosure another, embodiment there is provided a kind of camera apparatus comprising above-mentioned lens driver；
At least one lens being fixed in the lens support；And it receives and is passed by the image of the light of at least one lens
Sensor.
According to a further embodiment of the disclosure, a kind of electronic equipment is additionally provided, may include above-mentioned camera apparatus.
In the description of this specification, reference term " one embodiment/mode ", " some embodiment/modes ", " show
The description of example ", " specific example " or " some examples " etc. mean to combine the specific features of the embodiment/mode or example description,
Structure, material or feature are contained at least one embodiment/mode or example of the application.In the present specification, to upper
The schematic representation for stating term is necessarily directed to identical embodiment/mode or example.Moreover, the specific features of description,
Structure, material or feature can be combined in any suitable manner in any one or more embodiment/modes or example.In addition,
Without conflicting with each other, those skilled in the art can by different embodiment/modes described in this specification or
Example and different embodiment/modes or exemplary feature are combined.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present application, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
It will be understood by those of skill in the art that above embodiment is used for the purpose of clearly demonstrating the disclosure, and simultaneously
Non- be defined to the scope of the present disclosure.For those skilled in the art, may be used also on the basis of disclosed above
To make other variations or modification, and these variations or modification are still in the scope of the present disclosure.
Description of symbols
100 lens drivers
110 shells
120 lens supports
121 hollow portions
130 pedestals
131 bottoms
132 sidewall portions
140 portions piezoelectricity USM
141 first portions piezoelectricity USM
142 second portions piezoelectricity USM
150 guiding ball portions
160 position detecting devices
161 first position detecting devices
162 second position detecting devices
170 flexible circuit boards
1411 substrates
1412 piezoelectric elements
1413 silicon rubber
1414 charge pumps
1421 substrates
1422 piezoelectric elements
1423 silicon rubber
1424 charge pumps
1510 first guiding ball components
1520 second guiding ball components
1530 thirds are oriented to ball component
1611 permanent magnets
1612 Hall sensors
1621 permanent magnets
1622 Hall sensors.
Claims (10)
1. a kind of auto-focusing lens driver of piezoelectricity USM characterized by comprising
Lens support, the lens support is for keeping at least one imaging lens；
The portion piezoelectricity USM, including the first portion piezoelectricity USM and the second portion piezoelectricity USM, the portion the first piezoelectricity USM and the second piezoelectricity USM
The focal position that portion is used to that the lens support to be made to be moved to the lens in the optical axis direction of the lens；And
It is oriented to ball portion, including multiple guiding ball components, the multiple guiding ball component comes from described first for receiving
The pressure in the portion piezoelectricity USM and the second portion piezoelectricity USM, and keep smooth shifting of the lens support in the optical axis direction
It is dynamic,
Wherein, the portion the first piezoelectricity USM and the second portion piezoelectricity USM are separately positioned on the diagonal of the lens support
Two adjacent corners at, the diagonal line is located in the horizontal plane vertical with the optical axis direction and by the lens
The lens support different from two corners of the lens support is arranged in optical axis center point, the guiding ball portion
Another corner portion.
2. lens driver as described in claim 1, which is characterized in that the portion the first piezoelectricity USM and the second piezoelectricity USM
Portion is at 45 ° to the force direction of the lens support and the diagonal line and towards the guiding ball portion.
3. lens driver as claimed in claim 1 or 2, which is characterized in that the guiding ball portion includes the first guiding
Ball component, the second guiding ball component and third are oriented to ball component,
The first guiding ball component is located at the force direction in the first portion piezoelectricity USM and the force direction in the second portion piezoelectricity USM
Intersection position near, and
The second guiding ball component is located near the first guiding ball component in the force direction in the first portion piezoelectricity USM,
The third guiding ball component is located near the first guiding ball component in the force direction in the second portion piezoelectricity USM.
4. lens driver as claimed any one in claims 1 to 3, which is characterized in that it further include position detecting device,
The position detecting device includes first position detecting device and second position detecting device, passes through first position detecting device
Signal is detected to control the portion the first piezoelectricity USM, described second is controlled by the detection signal of second position detecting device
The portion piezoelectricity USM, so that the lens support is moved to the focal position of the lens.
5. lens driver as claimed in claim 4, which is characterized in that the first position detecting device is located at described the
Near one portion piezoelectricity USM and the second position detecting device is located near the portion the second piezoelectricity USM.
6. lens driver as described in claim 4 or 5, which is characterized in that the first position detecting device and second
The Hall sensor that position detecting device respectively includes permanent magnet and is oppositely arranged with the permanent magnet, the permanent magnet are located at institute
It states on the side wall of lens support.
7. such as lens driver described in any one of claims 1 to 6, which is characterized in that it further include pedestal, the pedestal
Including the sidewall portion extended towards the lens support,
It is at least offered on the side wall of the lens support and accommodates the first guiding ball component, the second guiding ball structure
The guide groove of part and third guiding ball component, the first guiding ball component, the second guiding ball component and third guiding
Ball component is contacted with the guide groove with the sidewall portion respectively, so as to when the lens support is mobile, described first
Guiding ball component, the second guiding ball component and third guiding ball component are rolled.
8. lens driver as claimed in claim 7, which is characterized in that the first guiding ball component, the second guiding
Ball component and third guiding ball component respectively include three balls, and three balls are arranged along the optical axis direction, and
And upper spheres are identical as the diameter of lower spheres, and are greater than or equal to the diameter of middle part ball.
9. lens driver as claimed in claim 3, which is characterized in that the centre of sphere of the first guiding ball component and institute
The distance for stating the center line in the first portion piezoelectricity USM is the center of third guiding ball component and the portion the first piezoelectricity USM
The centre of sphere of 1.2 to 1.5 times of the distance of line and the first guiding ball component and the center in the portion the second piezoelectricity USM
The distance of line is 1.2 to 1.5 times of the second guiding ball component at a distance from the center line in the portion the second piezoelectricity USM.
10. a kind of camera apparatus characterized by comprising
Lens driver as claimed in any one of claims 1-9 wherein；
At least one lens being fixed in the lens support；And
Receive the imaging sensor of the light by least one lens.
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