CN103176261A - Driving device - Google Patents
Driving device Download PDFInfo
- Publication number
- CN103176261A CN103176261A CN2011104372989A CN201110437298A CN103176261A CN 103176261 A CN103176261 A CN 103176261A CN 2011104372989 A CN2011104372989 A CN 2011104372989A CN 201110437298 A CN201110437298 A CN 201110437298A CN 103176261 A CN103176261 A CN 103176261A
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- Prior art keywords
- fixed
- movable piece
- drive unit
- fixed mount
- hole
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Abstract
A driving device is used for driving a lens module to move. The driving device comprises a fixing support, a movable piece, a magnetic plate, a magnet, a supporting body, a guiding rod, a contact rod and a piezoelectric unit. The fixing support is provided with an accommodating space and an opening. The movable piece is arranged in the accommodating space and provided with a through hole. The magnetic plate is fixed on the fixing support. The magnetic is fixed on the movable piece, and acting force between the magnet and the magnetic plate can fix the movable piece on a preset position in the fixing support. The supporting body is matched with the fixing support and used for accommodating the movable piece. The guiding rod penetrates through the through hole of the movable piece, and two ends of the guiding rod are fixed on the fixing support and the supporting body respectively. The contact rod is fixed on the movable piece. The piezoelectric unit is fixed in the opening, butts against the contact rod and is used for deforming to generate friction between the piezoelectric unit and the contact rod to drive the movable piece to move in the accommodating space along the guiding rod.
Description
Technical field
The present invention relates to a kind of drive unit, relate in particular to a kind of drive unit of employing piezoelectric unit.
Background technology
Digital camera or have on the mobile phone of shoot function and be equipped with at least one camera lens module, and the function of this camera lens module moves along optical axis for driving optical mirror slip or optical mirror slip group, to reach the function of automatic focusing and/or zoom.
one of moving method of optical mirror slip group is piezo-electric motor, the contact lever that it has piezoelectric unit and contacts with piezoelectric unit, in order to make the movable piece that holds camera lens module have an original state (when piezoelectric unit deformation does not occur, movable piece can be fixed and can not be moved, to prevent the damage of camera lens module), mat is lived two magnet and is removed to attract to be fixed on contact lever on movable piece to realize, magnet is positioned at the two ends in optical mirror slip group optical axis path, piezoelectric unit is between two magnet, piezoelectric unit generation deformation, friction force drive movable piece between piezoelectric element and contact lever moves up and down and realizes focusing or zoom function.
Adopt magnet to be arranged on the structure (namely attracting up and down mode) at two ends, optical mirror slip group optical axis path, must improve height of drive unit; In addition, owing to must have acting force between contact lever and magnet, therefore contact lever must be selected the material that can attract each other with magnet, for example, and metal or magnetic material, thus the selection of contact lever is restricted.
Summary of the invention
In view of this, be necessary the drive unit that provides a kind of height less.
A kind of drive unit be used for to drive the motion of camera lens module, and described camera lens module has optical axis, and described drive unit comprises: a fixed mount, have the receiving space of central shaft and optical axis coincidence, and have opening on described fixed mount; One movable piece is arranged in described receiving space, and described movable piece has the through hole of the described optical axis of central axes; One magnetic piece is fixed on described fixed mount; One magnet, on fixing described movable piece, the acting force between described magnet and magnetic piece one of is fixed on described movable piece in described fixed mount on predeterminated position; One supporting body matches with described fixed mount be used to accommodating described movable piece; One guide rod is located in the through hole of described movable piece, and two ends are separately fixed on described fixed mount and supporting body; One contact lever is fixed on described movable piece; And a piezoelectric unit, be fixed in described opening and against described contact lever, described piezoelectric unit be used for occuring deformation with and described contact lever between produce friction force and drive described movable piece and move in described receiving space along described guide rod.
Compared to prior art, the drive unit of the embodiment of the present invention makes movable piece have an original state with the magnet and the magnetic piece that are arranged on movable piece and fixed mount, and the setting of magnet and magnetic piece is away from piezoelectric unit, therefore do not need extra the reservation to hold the height space of piezoelectric unit, thereby make the highly less of drive unit.
In addition, owing to only using a magnet can simplify the drive unit assembling flow path, also can avoid the contraposition problem of two magnet.
Moreover, by the fixing movable piece of the attractive force between magnet and magnetic piece, and do not interact between magnet and contact lever, therefore the selection of contact lever can not be restricted, can be any materials.
Description of drawings
Fig. 1 is the schematic diagram of embodiment of the present invention drive unit.
Fig. 2 is the exploded view of embodiment of the present invention drive unit.
Fig. 3 is the exploded view of another angle of embodiment of the present invention drive unit.
The main element symbol description
| |
100 |
| Fixed |
11 |
| The first receiving |
110 |
| The first through |
111 |
| |
112 |
| The |
113 |
| The |
114 |
| |
12 |
| The second receiving |
120 |
| The second through |
121 |
| Third through- |
122 |
| The |
123 |
| The |
124 |
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13 |
| |
130 |
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131 |
| |
132 |
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14 |
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15 |
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16 |
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17 |
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18 |
| Retaining |
19 |
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20 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
See also Fig. 1, Fig. 2 and shown in Figure 3, the drive unit 100 that the embodiment of the present invention provides is used for driving camera lens module (not shown) and moves to realize the focusing operation, and drive unit 100 comprises fixed mount 11, movable piece 12, supporting body 13, guide rod 14, piezoelectric unit 15, magnetic piece 16, magnet 17, circuit board 18, retaining piece 19 and contact lever 20.
Fixed mount 11 is for having the square structure of the first receiving space 110, and the first receiving space 110 is used for accommodating the central shaft of movable piece 12, the first receiving spaces 110 and the optical axis coincidence of camera lens module.An angle of fixed mount 11 has the first through hole 111 of a central axes camera lens module optical axis, fixed mount 11 has and has opening 112 on a sidewall of the first through hole 111 in order to accommodate piezoelectric unit 15, and retaining piece 19 is used for piezoelectric unit 15 is fixed in opening 112 and circuit board 18 is fixed on fixed mount 11.Fixed mount 11 has the first pilot hole 113 near an end of supporting body 13, and fixed mount 11 has on the sidewall of opening 112 and has the first groove 114, the first groove 114 is used for accommodating fixed magnetic sheet 16, and magnetic piece 16 can be fixed in the first groove 114 by glue.
the first through hole 111 on corresponding fixed mount 11, the second through hole 121 and third through-hole 122 and the second through hole 121 and the coaxial setting of third through-hole 122 that have paralleloscope head mould group optical axis on an angle of movable piece 12, guide rod 14 is located in the second through hole 121 and third through-hole 122, and two ends lay respectively in the first through hole 111 and blind hole 131, be positioned at and have corresponding the first through hole 111 on the first through hole 111 and blind hole 131(supporting body 13, the second through hole 121 and third through-hole 122 and arrange) in the part can be fixed on fixed mount 11 and supporting body 13 by a glue mode, thereby make movable piece 12 move up and down in the first receiving space 110 under the guiding of guide rod 14.
The first groove 114 on corresponding fixed mount 11, have the second groove 123, the second grooves 123 on movable piece 12 and be used for accommodating magnet 17, magnet 17 and magnetic piece 16 attract each other, so that the relative fixed mount 11 of movable piece 12 is fixed on certain position, thereby make the camera lens module that an initial state be arranged.
The shape of relative fixed mount 11 and movable piece 12, supporting body 13 is square structure, its geometric center has a light hole 130, is used for the light by the camera lens module is entered on the image sensor (not shown) that is arranged on supporting body 13 with imaging.Four jiaos of supporting body 13 have respectively first reference column 132, thereby the first reference column 132 matches with the first pilot hole 113 on fixed mount 11 fixed mount 11 is fixed on supporting body 13.
when 18 pairs of piezoelectric units 15 of circuit board provide voltage, piezoelectric unit 15 can be converted to the electric energy of input the mechanical deformation of self, this mechanical deformation has the component of paralleloscope head mould group optical axis, this deformation component makes between piezoelectric unit 15 and contact lever 20 has relative displacement, when the interaction force between piezoelectric unit 15 and contact lever 20 during greater than the friction force between both, be fixed on fixed mount 11 due to piezoelectric unit 15 again and can not move, so contact lever 20 drives movable piece 12 and can move up and down in first receiving space 110 of guide rod 14 at fixed mount 11 under the driving of piezoelectric unit 15 deformation components under acting force, thereby make the camera lens module realize that under the drive of movable piece 12 focusing or zoom operation are to obtain clear image.
In addition, thus owing to only using a magnet 17 can simplify drive unit 100 assembling flow paths, also can avoid the contraposition problem of two magnet.
Moreover, by the fixing movable piece 12 of the attractive force between magnet 17 and magnetic piece 16, and do not interact between magnet 17 and contact lever 20, therefore the selection of contact lever 20 can not be restricted, can be any materials.
Be understandable that, those skilled in the art also can do other variation etc. and be used in design of the present invention in spirit of the present invention, as long as it does not depart from technique effect of the present invention and all can.The variation that these are done according to spirit of the present invention is within all should being included in the present invention's scope required for protection.
Claims (9)
1. a drive unit, be used for driving the motion of camera lens module and realize focusing or zoom, and described camera lens module has optical axis, and described drive unit comprises:
One fixed mount has the receiving space of central shaft and optical axis coincidence, has opening on described fixed mount;
One movable piece is arranged in described receiving space, and described movable piece has the through hole of the described optical axis of central axes;
One magnetic piece is fixed on described fixed mount;
One magnet, on fixing described movable piece, the acting force between described magnet and magnetic piece one of is fixed on described movable piece in described fixed mount on predeterminated position;
One supporting body matches with described fixed mount be used to accommodating described movable piece;
One guide rod is located in the through hole of described movable piece, and two ends are separately fixed on described fixed mount and supporting body;
One contact lever is fixed on described movable piece; And
One piezoelectric unit is fixed in described opening and against described contact lever, thus described piezoelectric unit be used for occuring deformation with and described contact lever between produce friction force and drive described movable piece and move in described receiving space along described guide rod.
2. drive unit as claimed in claim 1, is characterized in that, has through hole on described fixed mount, and one of described guide rod end is fixed in described through hole.
3. drive unit as claimed in claim 2, is characterized in that, has blind hole on described supporting body, and the other end of described guide rod is fixed in described blind hole.
4. drive unit as claimed in claim 1, is characterized in that, has the first groove on described fixed mount, and described magnetic piece is fixed in described the first groove.
5. drive unit as claimed in claim 4, is characterized in that, has the second groove on described movable piece, and described magnet is fixed in described the second groove.
6. drive unit as claimed in claim 5, is characterized in that, has the 3rd groove that has the parallel described optical axis of length direction on the sidewall of described the second groove on described movable piece, and described contact lever is fixed in described the 3rd groove.
7. drive unit as described in claim 1 to 6 any one, is characterized in that, described drive unit further comprises retaining piece, and described retaining piece is used for described piezoelectric unit is fixed in described opening.
8. drive unit as claimed in claim 7, is characterized in that, described drive unit further comprises a circuit board, and described circuit board is fixed on described retaining piece and with described piezoelectric unit and is electrical connected.
9. drive unit as claimed in claim 7, is characterized in that, the end face that described fixed mount is relative with described supporting body has respectively pilot hole and reference column, and described pilot hole and reference column match and make described fixed mount be fixed on described supporting body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104372989A CN103176261A (en) | 2011-12-23 | 2011-12-23 | Driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104372989A CN103176261A (en) | 2011-12-23 | 2011-12-23 | Driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103176261A true CN103176261A (en) | 2013-06-26 |
Family
ID=48636237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104372989A Pending CN103176261A (en) | 2011-12-23 | 2011-12-23 | Driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103176261A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113114883A (en) * | 2021-03-26 | 2021-07-13 | 南昌欧菲光电技术有限公司 | Camera module and electronic equipment |
| WO2022033356A1 (en) * | 2020-08-12 | 2022-02-17 | 华为技术有限公司 | Ultrasonic piezoelectric motor, camera module, and electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498405C (en) * | 2005-01-27 | 2009-06-10 | 柯尼卡美能达精密光学株式会社 | Lens unit and image pickup unit |
| CN201477278U (en) * | 2009-08-03 | 2010-05-19 | 一品国际科技股份有限公司 | Piezoelectric autofocus lens module |
| US20110141584A1 (en) * | 2009-12-10 | 2011-06-16 | New Scale Technologies | Lens actuator module |
| US20110149421A1 (en) * | 2009-12-18 | 2011-06-23 | Chuel Jin Park | Lens actuating module |
| JP2011133792A (en) * | 2009-12-25 | 2011-07-07 | Tdk Corp | Lens driving device |
-
2011
- 2011-12-23 CN CN2011104372989A patent/CN103176261A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498405C (en) * | 2005-01-27 | 2009-06-10 | 柯尼卡美能达精密光学株式会社 | Lens unit and image pickup unit |
| CN201477278U (en) * | 2009-08-03 | 2010-05-19 | 一品国际科技股份有限公司 | Piezoelectric autofocus lens module |
| US20110141584A1 (en) * | 2009-12-10 | 2011-06-16 | New Scale Technologies | Lens actuator module |
| US20110149421A1 (en) * | 2009-12-18 | 2011-06-23 | Chuel Jin Park | Lens actuating module |
| JP2011133792A (en) * | 2009-12-25 | 2011-07-07 | Tdk Corp | Lens driving device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022033356A1 (en) * | 2020-08-12 | 2022-02-17 | 华为技术有限公司 | Ultrasonic piezoelectric motor, camera module, and electronic device |
| CN114077031A (en) * | 2020-08-12 | 2022-02-22 | 华为技术有限公司 | Ultrasonic piezoelectric motor, camera module and electronic equipment |
| CN114077031B (en) * | 2020-08-12 | 2023-03-10 | 华为技术有限公司 | Ultrasonic piezoelectric motor, camera module and electronic equipment |
| EP4191313A4 (en) * | 2020-08-12 | 2024-01-17 | Huawei Technologies Co., Ltd. | Ultrasonic piezoelectric motor, camera module, and electronic device |
| CN113114883A (en) * | 2021-03-26 | 2021-07-13 | 南昌欧菲光电技术有限公司 | Camera module and electronic equipment |
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Application publication date: 20130626 |
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| WD01 | Invention patent application deemed withdrawn after publication |