CN111025521B - Lens driving device for auto-focusing ball type USM, camera device and electronic equipment - Google Patents
Lens driving device for auto-focusing ball type USM, camera device and electronic equipment Download PDFInfo
- Publication number
- CN111025521B CN111025521B CN201911364604.3A CN201911364604A CN111025521B CN 111025521 B CN111025521 B CN 111025521B CN 201911364604 A CN201911364604 A CN 201911364604A CN 111025521 B CN111025521 B CN 111025521B
- Authority
- CN
- China
- Prior art keywords
- lens
- balls
- ultrasonic motor
- base
- piezoelectric
- 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
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 238000003384 imaging method Methods 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 15
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process 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
- 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
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The present disclosure provides a lens driving apparatus of an auto-focus ball type USM for providing an auto-focus function, comprising: a lens support section for holding at least one imaging lens; an ultrasonic motor driving the lens support part in an optical axis direction of the lens to move the lens support part to a focal position of the lens; a plurality of balls guiding movement of the lens support part; and a base for supporting the lens supporting part, the ultrasonic motor and the plurality of balls, the ultrasonic motor including a piezoelectric mover and a stator, and the ultrasonic motor being disposed at an intersecting position of two inner side walls of the base, and the plurality of balls being disposed at a position of an inner side wall of the base opposite to the intersecting position. The disclosure also provides a camera device and an electronic device.
Description
Technical Field
The present disclosure relates to a lens driving device of an auto-focus ball USM, a camera device, and an electronic apparatus.
Background
In portable devices such as smartphones and tablet personal computers, diversification and high precision of image pickup modules are being pursued. However, with the increase in aperture of lenses and the like, conventional methods such as VCM (voice coil motor) systems and the like tend to have insufficient driving force.
Therefore, the practical use of an Autofocus (AF) driver that provides an ultrasonic motor using a larger driving force is an urgent task, and how to ensure and maintain the accuracy of operation in such a driver is a very important issue.
Disclosure of Invention
In order to solve at least one of the above technical problems, the present disclosure provides a lens driving device of an auto-focusing ball USM, a camera device and an electronic apparatus.
According to one aspect of the present disclosure, a lens driving apparatus of an auto-focus ball USM for providing an auto-focus function, includes:
a lens support section for holding at least one imaging lens;
An ultrasonic motor that drives the lens support section in an optical axis direction of a lens to move the lens support section to a focal position of the lens;
A plurality of balls guiding movement of the lens support part; and
A base for supporting the lens supporting portion, the ultrasonic motor, and the plurality of balls,
The ultrasonic motor includes a piezoelectric mover and a stator, and is provided at an intersection position of two inner side walls of the base, and the plurality of balls are provided at positions of the inner side walls of the base opposite to the intersection position.
According to at least one embodiment of the present disclosure, the lens support portion is held with the plurality of balls by the ultrasonic motor, and the lens support portion includes a sliding portion with which a stator of the ultrasonic motor is in frictional contact so as to move the lens support portion in the optical axis direction by a frictional force between the stator and the sliding portion.
According to at least one embodiment of the present disclosure, the lens driving device further includes a pressing part for adjusting a friction force between the stator and the sliding part, and provided to a supporting part of the piezoelectric mover.
According to at least one embodiment of the present disclosure, the support part of the piezoelectric mover is a push plate, and the frictional force between the stator and the sliding part is adjusted by adjusting the pressure applied to the push plate by the pressing part.
According to at least one embodiment of the present disclosure, the lens driving device further includes a buffer portion provided between the support portion and the piezoelectric mover, and pressure applied by the pressing portion is provided to the piezoelectric mover through the buffer portion.
According to at least one embodiment of the present disclosure, the pressing portion includes a nut portion fixed to one side of the supporting portion, the one side being an opposite side of the side where the supporting portion of the buffer portion is provided, and a bolt portion screwed with the nut portion to adjust a pressure applied to the push plate.
According to at least one embodiment of the present disclosure, the lens driving device further includes a flexible circuit board disposed between the buffer portion and the piezoelectric mover, and the flexible circuit board provides a control signal to the piezoelectric mover.
According to at least one embodiment of the present disclosure, the plurality of balls includes two sets of balls including an upper ball, a middle ball, and a lower ball, respectively, which are in rolling contact with an inner sidewall of the base and an outer sidewall of the lens supporting portion, respectively.
According to at least one embodiment of the present disclosure, the outer sidewall of the lens supporting part is provided with a first receiving groove for receiving a first set of balls,
The inner side wall of the base is provided with a second accommodating groove for accommodating the first group of balls,
A third accommodating groove for accommodating the second group of balls is arranged on the outer side wall of the lens supporting part,
A fourth accommodating groove for accommodating the second group of balls is arranged on the inner side wall of the base,
Wherein one of the first, second, third and fourth receiving grooves is in one-point contact with the balls, and the remaining receiving grooves are in two-point contact with the balls.
According to at least one embodiment of the present disclosure, the lens driving device further includes a position detecting device for detecting a moving position of the lens supporting portion, the position detecting device being disposed in the vicinity of a corner position of the base different from a disposition position of the ultrasonic motor and the plurality of balls.
According to another aspect of the present disclosure, a camera apparatus includes:
the lens driving device as described above;
At least one lens fixed in the lens support; and
An image sensor receiving light passing through the at least one lens.
According to another aspect of the present disclosure, an electronic device includes a camera apparatus as described above.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic view of a lens driving apparatus according to an embodiment of the present disclosure.
Fig. 2 is a schematic cross-sectional view of a lens driving apparatus according to one embodiment of the present disclosure.
Fig. 3 is a schematic cross-sectional view of a lens driving apparatus according to one embodiment of the present disclosure.
Fig. 4 is a schematic diagram of an ultrasonic motor according to one embodiment of the present disclosure.
Fig. 5 is a schematic diagram of an ultrasonic motor operation mode according to one embodiment of the present disclosure.
Description of the reference numerals
100. Lens driving device
110. Lens support
111. Side wall
112. Hollow part
113. Sliding part
120. Ultrasonic motor
121. Piezoelectric mover
121A first part
121B second part
121C third section
121D fourth part
122. Stator
130. Multiple balls
131. First group of balls
131A upper ball
131B middle ball
131C lower ball
132. Second group of balls
140. Base seat
141. Side wall portion
142. Bottom wall portion
150. Pressing part
151. Nut part
152. Bolt part
160. Support part
160. Push plate
170. Buffer part
180. Flexible circuit board
191. Permanent magnet
192. Sensor for detecting a position of a body
Detailed Description
The present disclosure is described in further detail below with reference to the drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant content and not limiting of the present disclosure. It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings.
In addition, embodiments of the present disclosure and features of the embodiments may be combined with each other without conflict. The technical aspects of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the exemplary implementations/embodiments shown are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Thus, unless otherwise indicated, features of the various implementations/embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concepts of the present disclosure.
The use of cross-hatching and/or shading in the drawings is typically used to clarify the boundaries between adjacent components. As such, the presence or absence of cross-hatching or shading does not convey or represent any preference or requirement for a particular material, material property, dimension, proportion, commonality between illustrated components, and/or any other characteristic, attribute, property, etc. of a component, unless indicated. In addition, in the drawings, the size and relative sizes of elements may be exaggerated for clarity and/or descriptive purposes. While the exemplary embodiments may be variously implemented, the specific process sequences may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in reverse order from that described. Moreover, like reference numerals designate like parts.
When an element is referred to as being "on" or "over", "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element, there are no intervening elements present. For this reason, the term "connected" may refer to physical connections, electrical connections, and the like, with or without intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "under … …," "under … …," "under … …," "down," "over … …," "up," "over … …," "higher" and "side (e.g., as in" sidewall ") to describe one component's relationship to another component as shown in the figures. In addition to the orientations depicted in the drawings, the spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture. For example, if the device in the figures is turned over, elements described as "under" or "beneath" other elements or features would then be oriented "over" the other elements or features. Thus, the exemplary term "below … …" may encompass both an orientation of "above" and "below". Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
An Ultrasonic Motor (USM) is a driver that uses mechanical vibration in an Ultrasonic frequency domain as a driving source. The excitation element of the ultrasonic motor is a piezoelectric ceramic, and is therefore also called a piezoelectric motor.
In the piezoelectric USM device supported by a support member (e.g., a base) of the driving device, the lens support portion (movable portion) is driven in the optical axis direction of the lens by ultrasonic vibration, so that the lens is moved to the optical focus position.
The driving method of the piezoelectric USM device is characterized in that when the lens support is moved in the optical axis direction by ultrasonic vibration, the piezoelectric element of the USM device is in contact with the driving surface of the lens support through the upper and lower charge pumps connected with the piezoelectric element, and the relative position between the piezoelectric USM device and the lens support is changed by ultrasonic vibration.
Fig. 1 and 2 show schematic diagrams of a lens driving apparatus 100 of an auto-focus ball USM according to an embodiment of the present disclosure. In which a top view (upper left) and a cross-sectional view (lower right) of the lens driving apparatus 100 are shown in fig. 1, and fig. 2 shows a cross-sectional view of the lens driving apparatus 100.
As shown in fig. 1 and 2, the lens driving apparatus 100 of the auto-focus ball USM for providing an auto-focus function may include a lens supporting part 110, an ultrasonic motor 120, a plurality of balls 130, and a base 140.
The lens support 110 holds at least one image pickup lens (not shown).
The ultrasonic motor 120 drives the lens support 110 in the optical axis direction of the lens to move the lens support 110 to the focal position of the lens.
The plurality of balls 130 guide the movement of the lens support 110.
The base 140 serves to support the lens support 110, the ultrasonic motor 120, and the plurality of balls 130.
The lens supporting part 110 may include a sidewall 111 and a hollow 112, for example, a lens may be disposed in the hollow 112 of the lens supporting part 110, and the sidewall 111 forms a structure supporting the lens.
In the present disclosure, the lens support portion 110 is movable in the optical axis direction (direction perpendicular to the paper surface) of the lens in order to realize an auto-focusing function.
The ultrasonic motor 120 may include a piezoelectric motor 121 and a stator 122. The ultrasonic motor 120 is provided at an intersection position of two inner side walls of the base 140, and a plurality of balls 130 are provided at positions of inner side walls of the base 140 opposite to the intersection position.
The base 140 may include a side wall portion 141 and a bottom wall portion 142. Wherein the side wall portion 141 extends from the bottom wall portion 142 to form a space accommodating the lens support portion 110, the lens support portion 110 being disposed inside the space.
As shown in fig. 1, the ultrasonic motor 120 is disposed at the intersection position of the inner side walls of the adjacent two side wall portions 141 of the base 140, that is, in the vicinity of one corner portion of the base 140. The ball 130 is located at the intersection of the inner side walls of the adjacent two side wall portions 141 of the base 140 opposite to the ultrasonic motor 120, that is, at the other corner opposite to the one corner, so that the connection line between the ball 130 and the installation position of the ultrasonic motor 120 is substantially the diagonal line of the base 140.
The lens support 110 is held by the ultrasonic motor 120 and the plurality of balls 130. And the lens support 110 may include a sliding portion 113, the stator 122 of the ultrasonic motor 120 being in frictional contact with the sliding portion 113 so that the lens support 110 is moved in the optical axis direction by a frictional force between the stator 122 and the sliding portion 113.
The plurality of balls 130 may include at least a first set of balls 131 and a second set of balls 132.
The first set of balls 131 may include an upper ball 131a, a middle ball 131b, and a lower ball 131c. Wherein optionally, the diameter of the middle ball 131b may be smaller than the diameters of the upper ball 131a and the lower ball 131c, and the diameters of the upper ball 131a and the lower ball 131c may be the same.
Similarly, the second set of balls 132 may also be the same as the first set of balls 131, and will not be described again.
The upper, middle and lower balls of the two sets of balls are in rolling contact with the inner side wall of the base 140 and the outer side wall of the lens support 110, respectively.
The outer sidewall of the lens supporting part 110 is provided with a first receiving groove for receiving the first set of balls 131, and the inner sidewall of the base 140 is provided with a second receiving groove for receiving the first set of balls 131. Similarly, the outer sidewall of the lens supporting part 110 is provided with a third receiving groove for receiving the second set of balls 132, and the inner sidewall of the base 140 is provided with a fourth receiving groove for receiving the second set of balls 132.
One of the first, second, third and fourth receiving grooves is in point contact with the balls, and the remaining receiving grooves are in two-point contact with the balls. For example, as shown in fig. 1, the first set of balls 131 are in two-point contact with the outer sidewall of the lens supporting portion 110 and the inner sidewall of the base 140, respectively, while the second set of balls 132 are in two-point contact and one-point contact with the outer sidewall of the lens supporting portion 110 and the inner sidewall of the base 140, respectively. In fig. 1, only one exemplary embodiment of the present disclosure is shown, and the position of one point contact may be provided on the lens support 110, or may be provided in a contact manner of the first group of balls 131. This is not particularly limited in the present disclosure.
By the one-point contact, the lens driving device can be assembled under the condition of low requirement on the installation precision.
The lens driving apparatus 100 may further include a pressing part 150, a supporting part 160, and a buffer part 170.
The pressing part 150 is used to adjust the frictional force between the stator 122 and the sliding part 113, and is provided to the supporting part 160 of the piezoelectric mover 121. The friction force may cause the lens support 110 to move in the optical axis direction.
The pressing part 150 may include a nut part 151 and a bolt part 152, the nut part 151 being fixed to one side of the support part 160, one side being the opposite side of the support part 160 where the buffer part 170 is provided, and the nut part 151 being screw-coupled with the bolt part 152, the bolt part 152 being screwed to adjust the pressure applied to the support part 160.
The supporting portion 160 of the piezoelectric mover 121 may be a push plate, and the frictional force between the stator 122 and the sliding portion 113 is adjusted by adjusting the pressure applied to the push plate by the pressing portion 150.
According to a further embodiment of the present disclosure, the lens driving apparatus 100 may further include a buffer part 170, the buffer part 170 being disposed between the support part 160 and the piezoelectric mover 121, the pressure applied by the pressure applying part 150 being provided to the piezoelectric mover 121 through the buffer part 170. The buffer portion 170 serves to buffer the pressure from the pressing portion 150 so as to protect the subsequent components.
The adjustment of the friction force will be described with reference to fig. 3.
When the bolt portion 152 is turned, the external thread of the bolt portion 152 is screwed with the internal thread of the nut portion 151, the front end portion of the bolt portion 152 advances in the nut portion 151, for example, in the arrow direction of the force F, and the end portion of the bolt portion 152 is pressed against the push plate 160, so that the force F1 is applied to the push plate 160, and the force applied to the push plate 160 is applied to the piezoelectric mover 121 through the buffer portion 170, and the force applied to the piezoelectric mover 121 is transmitted to the stator 122 as the force F2. The force F2 causes the frictional force between the stator 122 and the sliding portion 113 to change.
For example, as shown in fig. 3, when the bolt portion 152 is screwed in a counterclockwise direction (the counterclockwise direction is only an example as viewed from the right side, and may be a clockwise direction), the bolt portion 152 travels to the right side, which causes a force F1 to be applied to the push plate 160, a transmission through the buffer portion 170 to be applied to the piezoelectric mover 121, and finally a force F2 to be applied to the stator 122, which causes an increase in friction between the stator 122 and the sliding portion 113.
When the bolt portion 152 is screwed in the opposite direction to the above-described counterclockwise direction, the force F2 applied to the stator 122 will be reduced, which will reduce the friction force between the stator 122 and the sliding portion 113.
In this way, the friction force between the stator 122 and the sliding portion 113 can be adjusted to a proper value, so that a proper friction force is applied, and thus the operation accuracy of the lens supporting portion 110 can be ensured and maintained.
When the piezoelectric mover 121 is energized to generate ultrasonic vibration, the lens support portion 110 is moved in the optical axis direction by friction between the stator 122 and the sliding portion 113. Meanwhile, the balls 130 are located between the inner sidewall 141 of the base 140 and the sidewall 111 of the lens supporting portion 110 to support and guide the lens supporting portion 110. Wherein the upper ball and the lower ball are in contact rolling, and the diameter of the middle ball is smaller, so as to facilitate the rolling of the upper ball and the lower ball.
In fig. 4, a view of the ultrasonic motor 120 from multiple angles is shown. The side of the piezoelectric element 121 opposite to the buffer 170 is an electrode surface, and the electrode surface may be provided with electrode terminals to supply power to the piezoelectric element 121 through the electrode terminals.
Fig. 5 shows the operation of the piezoelectric actuator 121 when power is supplied. The piezoelectric mover 121 includes four parts: a first portion 121a, a second portion 121b, a third portion 121c, and a fourth portion 121d. As shown in fig. 5 (a), when the second portion 121b and the third portion 121c are energized, the ultrasonic motor 120 will operate in the direction shown in fig. 5 (a), and when the first portion 121a and the fourth portion 121d are energized, the ultrasonic motor 120 will operate in the direction shown in fig. 5 (b). In this way, the lens support portion 110 is driven to move in the optical axis direction by the friction between the stator 122 and the sliding portion 113.
According to further embodiments of the present disclosure, the lens driving apparatus 100 may further include a flexible circuit board (FPC) 180, wherein the flexible circuit board 180 is located at least between the buffer part 170 and the piezoelectric mover 121, and power may be supplied to the piezoelectric mover 121 through the flexible circuit board 180, and the like.
According to at least one embodiment of the present disclosure, the lens driving apparatus 100 may further include a position detecting device for detecting a moving position of the lens supporting part, the position detecting device including a permanent magnet 191 provided on the lens supporting part 110 and a hall sensor 192 provided on the flexible circuit board 180. The hall sensor 192 is used to detect a change in a magnetic field generated by the permanent magnet 191 provided on the lens support 110 to detect the position of the lens support 110, and may be fed back to an external circuit through the flexible circuit board 180, which may control the ultrasonic motor 120 or the like according to the detected position.
According to another embodiment of the present disclosure, there is provided a camera apparatus including the above-described lens driving apparatus; at least one lens fixed in the lens support; and an image sensor receiving light passing through the at least one lens.
According to still another embodiment of the present disclosure, there is also provided an electronic apparatus, which may include the above-described camera device.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be appreciated by those skilled in the art that the above-described embodiments are merely for clarity of illustration of the disclosure, and are not intended to limit the scope of the disclosure. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present disclosure.
Claims (7)
1. A lens driving apparatus of an auto-focus ball USM for providing an auto-focus function, comprising:
a lens support section for holding at least one imaging lens;
An ultrasonic motor that drives the lens support section in an optical axis direction of a lens to move the lens support section to a focal position of the lens;
A plurality of balls guiding movement of the lens support part; and
A base for supporting the lens supporting portion, the ultrasonic motor, and the plurality of balls,
The ultrasonic motor includes a piezoelectric mover and a stator, and is provided at an intersecting position of two inner side walls of the base, and the plurality of balls are provided at positions of the inner side walls of the base opposite to the intersecting position,
The lens support portion is held with the plurality of balls by the ultrasonic motor, and the lens support portion includes a sliding portion with which a stator of the ultrasonic motor is in frictional contact so as to move in the optical axis direction by a frictional force between the stator and the sliding portion,
The device also comprises a pressing part, wherein the pressing part is used for adjusting the friction force between the stator and the sliding part and is arranged on a supporting part of the piezoelectric motor, the supporting part of the piezoelectric motor is a push plate, the friction force between the stator and the sliding part is adjusted by adjusting the pressure exerted by the pressing part on the push plate,
Further comprising a buffer portion provided between the push plate and the piezoelectric mover, the pressure applied by the pressing portion being supplied to the piezoelectric mover through the buffer portion, the pressing portion including a nut portion fixed to one side of the push plate, the one side being an opposite side of the push plate where the buffer portion is provided, and a bolt portion screwed to adjust the pressure applied to the push plate,
And the position detection device is used for detecting the moving position of the lens supporting part and comprises a permanent magnet arranged on the lens supporting part.
2. The lens driving apparatus according to claim 1, further comprising a flexible circuit board provided between the buffer portion and the piezoelectric mover, and the flexible circuit board supplies a control signal to the piezoelectric mover.
3. The lens driving apparatus according to claim 1, wherein the plurality of balls includes two sets of balls including an upper ball, a middle ball, and a lower ball, respectively, which are in rolling contact with an inner sidewall of the base and an outer sidewall of the lens supporting portion, respectively.
4. A lens driving apparatus according to claim 3, wherein,
The outer side wall of the lens supporting part is provided with a first accommodating groove for accommodating a first group of balls,
The inner side wall of the base is provided with a second accommodating groove for accommodating the first group of balls,
A third accommodating groove for accommodating the second group of balls is arranged on the outer side wall of the lens supporting part,
A fourth accommodating groove for accommodating the second group of balls is arranged on the inner side wall of the base,
Wherein one of the first, second, third and fourth receiving grooves is in one-point contact with the balls, and the remaining receiving grooves are in two-point contact with the balls.
5. The lens driving apparatus according to any one of claims 1 to 4, wherein the position detecting means is provided in the vicinity of a corner position of a base different from a position where the ultrasonic motor and the plurality of balls are provided.
6. A camera apparatus, comprising:
the lens driving apparatus according to any one of claims 1 to 5;
At least one lens fixed in the lens support; and
An image sensor receiving light passing through the at least one lens.
7. An electronic device comprising the camera apparatus of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364604.3A CN111025521B (en) | 2019-12-26 | 2019-12-26 | Lens driving device for auto-focusing ball type USM, camera device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911364604.3A CN111025521B (en) | 2019-12-26 | 2019-12-26 | Lens driving device for auto-focusing ball type USM, camera device and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111025521A CN111025521A (en) | 2020-04-17 |
| CN111025521B true CN111025521B (en) | 2024-05-21 |
Family
ID=70213691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911364604.3A Active CN111025521B (en) | 2019-12-26 | 2019-12-26 | Lens driving device for auto-focusing ball type USM, camera device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111025521B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114077031B (en) * | 2020-08-12 | 2023-03-10 | 华为技术有限公司 | Ultrasonic piezoelectric motor, camera module and electronic equipment |
| CN114338960A (en) * | 2020-09-29 | 2022-04-12 | 宁波舜宇光电信息有限公司 | Optical actuator and corresponding camera module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005261025A (en) * | 2004-03-10 | 2005-09-22 | Taiheiyo Cement Corp | Ultrasonic motor, moving device and its driving method |
| CN101578541A (en) * | 2006-12-28 | 2009-11-11 | 株式会社腾龙 | Lens driving device |
| CN208795910U (en) * | 2018-08-06 | 2019-04-26 | 深圳市三阶微控实业有限公司 | A kind of micro-camera using ultrasonic step wave motor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8320756B2 (en) * | 2010-08-10 | 2012-11-27 | Digital Imaging Systems Gmbh | Single actuator configuration for a camera module |
-
2019
- 2019-12-26 CN CN201911364604.3A patent/CN111025521B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005261025A (en) * | 2004-03-10 | 2005-09-22 | Taiheiyo Cement Corp | Ultrasonic motor, moving device and its driving method |
| CN101578541A (en) * | 2006-12-28 | 2009-11-11 | 株式会社腾龙 | Lens driving device |
| CN208795910U (en) * | 2018-08-06 | 2019-04-26 | 深圳市三阶微控实业有限公司 | A kind of micro-camera using ultrasonic step wave motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111025521A (en) | 2020-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210208361A1 (en) | Lens driving device, camera module and optical apparatus | |
| CN105319663B (en) | Lens driving device, camera device and electronic equipment | |
| KR102071953B1 (en) | Lens drive device, camera device, and electronic device | |
| US10809487B2 (en) | Optical system | |
| CN111399163B (en) | Lens driving device with optical anti-shake function, camera device and electronic equipment | |
| JP2014219654A (en) | Camera module | |
| CN111025521B (en) | Lens driving device for auto-focusing ball type USM, camera device and electronic equipment | |
| KR20190101762A (en) | Camera module | |
| CN206489312U (en) | Lens driver, photographic means and electronic equipment | |
| CN211698526U (en) | SMA wire optical anti-shake lens drive device, camera device, and electronic apparatus | |
| KR20110064147A (en) | Camera module and control method thereof | |
| US20180224628A1 (en) | Optical system | |
| US7929851B2 (en) | Camera module with selectable imaging units and method for switching imaging capability of camera module | |
| CN110794547A (en) | Lens driving device of ball type voice coil motor, camera device and electronic apparatus | |
| US20140098421A1 (en) | Image shake correction apparatus, and optical device using the same | |
| US7729069B2 (en) | Lens module and camera module having same | |
| CN211878281U (en) | Lens driving device of ball type voice coil motor, camera device and electronic apparatus | |
| CN111045185A (en) | Lens driving device of ball type voice coil motor, camera device and electronic apparatus | |
| CN111142309B (en) | Piezoelectric optical anti-shake mechanism, camera device and electronic equipment | |
| US11397303B2 (en) | Optical element driving mechanism | |
| JP2022541785A (en) | The camera module | |
| US20230185164A1 (en) | Camera module | |
| CN111142310A (en) | SMA wire optical anti-shake lens drive device, camera device, and electronic apparatus | |
| US10750065B2 (en) | Miniaturized optical system with stabilization | |
| CN211878282U (en) | Ball-type USM lens driving device, camera device, and electronic apparatus |
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 |