WO2007105396A1 - 駆動装置 - Google Patents
駆動装置 Download PDFInfo
- Publication number
- WO2007105396A1 WO2007105396A1 PCT/JP2007/052482 JP2007052482W WO2007105396A1 WO 2007105396 A1 WO2007105396 A1 WO 2007105396A1 JP 2007052482 W JP2007052482 W JP 2007052482W WO 2007105396 A1 WO2007105396 A1 WO 2007105396A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- friction member
- springs
- drive
- driving
- leaf spring
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/021—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using intermittent driving, e.g. step motors, piezoleg motors
- H02N2/025—Inertial sliding motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/06—Drive circuits; Control arrangements or methods
- H02N2/065—Large signal circuits, e.g. final stages
- H02N2/067—Large signal circuits, e.g. final stages generating drive pulses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/802—Circuitry or processes for operating piezoelectric or electrostrictive devices not otherwise provided for, e.g. drive circuits
Definitions
- the present invention relates to a drive device, and more particularly to a self-propelled drive device using an electromechanical transducer.
- a driving device that positions a moving body by sliding movement of a driving friction member by an electromechanical transducer such as a piezoelectric element is known, and as described in Patent Document 1, an impact type in which a piezoelectric element does not move is known.
- Patent Document 2 there are a driving device and a self-propelled driving device in which a piezoelectric element is held by a moving body and moves together with the moving body.
- the fixed guide member and the urging guide member need to be formed of a material having high rigidity and stable frictional force, which has been a factor in increasing the cost of the driving device.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. 2004-80964
- Patent Document 2 Japanese Patent Laid-Open No. 10-225150
- an object of the present invention is to provide a self-propelled drive device that can be driven stably and is inexpensive.
- a driving apparatus includes a driving friction member that fixes one end of an electromechanical conversion element and is connected to the other end of the electromechanical conversion element.
- a movable body that is held so as to be movable in the expansion / contraction direction of the conversion element and is supported so as to be movable in the expansion / contraction direction of the electromechanical conversion element, and a driving friction member that extends in a band shape in the expansion / contraction direction of the electromechanical conversion element
- the leaf spring narrows the drive friction member even if the drive friction member is slightly displaced in the normal direction of the leaf spring.
- the holding force does not fluctuate and can exhibit a stable frictional force. Therefore, the moving body can be driven with a constant force even if the direction in which the leaf spring is held does not exactly match the direction in which the moving body can move.
- the drive device of the present invention can be provided at a low cost since the drive friction member is directly held by the leaf spring, so that the structure is simple.
- the drive device of the present invention may further include auxiliary springs that are respectively arranged outside the leaf springs and that exert elastic force only on both ends of the leaf springs.
- the auxiliary spring reinforces the force with which the leaf spring pinches the drive friction member at both ends of the leaf spring. As a result, it is possible to prevent the leaf spring from being bent in the longitudinal direction and to reduce the force for pinching the drive friction member at both ends, and to generate a constant driving force regardless of the position of the moving body.
- the leaf springs may have their free ends bent outward.
- the leaf spring is difficult to bend in the longitudinal direction, and the force for pinching the driving friction member varies depending on the position of the leaf spring. As a result, a constant driving force can be generated regardless of the position of the moving body.
- the driving friction member of the moving body is sandwiched between the pair of leaf springs, even if the moving direction of the moving body and the fixing direction of the leaf spring do not completely coincide, A constant driving force can be generated regardless of the position, and an inexpensive self-propelled driving device capable of stable driving can be provided.
- FIG. 1 is an exploded perspective view of a drive device according to an embodiment of the present invention.
- 2 is a detailed perspective view of the main leaf spring and auxiliary spring of FIG.
- FIG. 3 is a cross-sectional view of the moving unit of FIG.
- FIG. 4 is a circuit diagram of a drive circuit for driving the drive device of FIG.
- FIG. 5 is a time chart showing drive voltage signals of the drive circuit of FIG.
- FIG. 6 is a time chart showing a drive voltage signal when moving in the opposite direction to FIG.
- FIG. 7 is a diagram showing the distribution of pressure applied by the main leaf spring and auxiliary spring of FIG.
- FIG. 8 is a perspective view of a main leaf spring as an alternative to FIG.
- FIG. 1 shows a drive device 1 according to an embodiment of the present invention.
- the driving device 1 is for positioning the stage 3 on the base 2 in the directions of arrows A and B.
- the stage 3 has a sliding block 5 slidably engaged with a guide block 4 provided on the base 2 and is assembled so as to be movable only in the directions of arrows A and B with respect to the base 2.
- the moving unit 6 is fixed to the stage 3 with bolts 7.
- a base member 11 is fixed to the pedestal 2 so that a pair of main leaf springs 8 sandwiching the moving unit 6 and auxiliary springs 9 respectively disposed outside the main leaf springs 8 are fastened and held by screws 10.
- the moving unit 6 is interposed between the main leaf springs 8 so as to push and spread the main leaf springs 8 and auxiliary springs 9, and is sandwiched by the reaction force due to the elasticity of the main leaf springs 8 and auxiliary springs 9. Yes.
- the main leaf spring 8 is a leaf spring according to the present invention. As shown in FIG. The lower side is held by the base member 11 so as to be cantilevered in the short side direction. Further, the main leaf spring 8 has an upper end portion that is a free end that is not held by the base member 11 and is bent outward by about 45 ° over the entire length.
- the auxiliary spring 9 is cantilevered by the base member 11 so as to overlap the outer side of the main plate spring 8.
- the auxiliary spring 9 extends only to the vicinity of the upper end of the main leaf spring 8 in the short side direction, and the central portion hardly protrudes upward from the base member 11.
- the base member 11 is fixed to the base 2 so as to hold the main plate spring 8 in parallel with the movable AB direction of the stage 3.
- the moving unit 6 is one in which a piezoelectric element 13 and a driving friction member 14 are accommodated in a moving body 12 having a substantially rectangular parallelepiped metal blocking force.
- the piezoelectric element 13 is an electromechanical conversion element according to the present invention. One end of the piezoelectric element 13 is fixed to the moving body 12, and a drive voltage is applied via the lead wire 15 and the flexible substrate 16, so that the stage Extends and contracts in the same A-B direction as 3 moves.
- the drive friction member 14 is formed of, for example, a carbon fiber, protrudes laterally from the moving body 12 and is sandwiched between the main leaf springs 8, and extends from the friction portion 14 a to both sides of the piezoelectric element 13 in the expansion / contraction direction.
- the movable body 12 protrudes and includes shaft portions 14b and 14c that are slidably supported on a sealing plate 18 fixed to the end of the movable body 12 with screws 17 respectively.
- the driving friction member 14 has one shaft portion 14b connected to the end of the piezoelectric element 13 opposite to the end fixed to the moving body 12, and the piezoelectric element 13 expands and contracts so that A —Vibrates in the B direction (the expansion and contraction direction of the piezoelectric element 13).
- FIG. 4 shows a drive circuit for applying a voltage to the piezoelectric element 13.
- This drive circuit is a control circuit that outputs Vp (V) power supply, four FET19, 20, 21, 22 and control signals Scl, Sc2, Sc3, Sc4 for switching FET19, 20, 21, 22 respectively. 23 also has power.
- the drive circuit determines the drive voltage Vload applied between the two terminals of the piezoelectric element 13 by + Vp (V), —Vp (V), or 0 (V (V), based on the control signal Scl, Sc2, Sc3, Sc4. ).
- the driving circuit when the stage 3 is driven in the direction of arrow A, the driving circuit is piezoelectric.
- Vp (V) is applied to the piezoelectric element 13 from the no-voltage standard length to extend to the maximum length, and then at time t2, Vp (V) is When applied, it contracts to the minimum length and at time t3 it returns to the standard length with no voltage.
- Vload force SO (V) force Vp (V) or Vp (V) force also increases to 0 (V)
- the voltage change is small, so the piezoelectric element 13 expands relatively slowly.
- the drive voltage Vload decreases from + V p (V) to ⁇ Vp (V)
- the voltage change is large, and the piezoelectric element 13 contracts relatively steeply.
- the amount of movement of the moving body 12, that is, the stage 3, at the time Td obtained by adding the times tl, t2, and t3 is the length change of the piezoelectric element 13 and the distance between the friction portion 14a of the driving friction member 14 and the main leaf spring 8. It depends on the frictional force. Therefore, the drive circuit uses a series of voltage changes during this operation time Td as one drive operation, and repeats a series of drive operations according to the distance to which the stage 3 should be moved.
- the output timing of the control signals Scl and Sc2 and the output timing of the control signals Sc3 and Sc4 are It is better to reverse the direction when moving in the direction of arrow A.
- the expansion / contraction waveform of the piezoelectric element 13 contracts slowly and sharply in contrast to the driving by the driving voltage in FIG. 5, so that the moving body 12 extends in the direction of arrow B with respect to the base member 11.
- the moving amount per driving operation of the moving body 12 and the stage 3 is the same distance in the opposite direction as in FIG. 5 if the frictional force between the driving friction member 14 and the main plate spring 8 is constant. become.
- FIG. 7 shows the drive friction of the main leaf spring 8 at the position where the drive friction member 14 is pinched (holding position).
- a change in pressure applied to the rubbing member 14, that is, a distribution of elastic force in the long side direction of the main leaf spring 8 and the auxiliary spring 9 is shown.
- the main leaf spring 8 squeezes in the short side direction and pressurizes the drive friction member 14, but can also squeeze in the long side direction. For this reason, when the auxiliary spring 9 is not provided, only the vicinity of the portion that holds the driving friction member 14 crawls in the short side direction and exerts the applied pressure.
- the main leaf spring 8 has an effective length that extends in the short side direction because there are few portions that can be held on one side in the long side direction when the driving friction member 14 is held at both ends in the long side direction. Becomes shorter and the applied pressure becomes smaller.
- the bent portion acts as a rib that suppresses the sag in the long side direction of the main plate spring 8 and depends on the position of the drive friction member 14.
- the change in the applied pressure of the main leaf spring 8 is reduced.
- this also inevitably reduces the applied pressure at both ends of the main leaf spring 8, as shown in FIG.
- the auxiliary spring 9 is disposed outside the main plate spring 8.
- the auxiliary spring 9 extends only in the short-side direction at both ends, and can exert an elastic force on the main leaf spring 8. That is, the auxiliary spring 9 supports the main plate spring 8 only at both ends, and acts to pressurize the drive friction member 14 via the main plate spring 8. Therefore, as shown in FIG. 7, the pressure applied by the main leaf spring 8 and the auxiliary spring 9 hardly changes depending on the position of the drive friction member 14. As a result, the amount of movement of the stage 3 per one driving operation of the time Td that does not change depending on the position of the frictional force force moving unit 6 between the main leaf spring 8 and the driving friction member 14 is Regardless of position, it is always constant.
- the moving unit 6 is moved from above with the pair of main leaf springs 8 in a state where the main leaf spring 8 and the auxiliary spring 9 are fixed to the base member 11.
- the drive device 1 can be easily inserted, and the assembly of the drive device 1 is simple.
- both end portions of the main leaf spring 8 in the long side direction may be arranged in the A-B direction.
- other types of springs such as a compression spring that exerts an elastic force only at both ends in the long side direction of the main leaf spring 8 may be used.
- the pressure applied to the drive friction member 14 can be kept constant by using the main leaf spring 8 'shown in FIG.
- This main leaf spring 8 ' is provided with a through hole 8a for reducing the elastic force in the elastically deforming portion, with the central through hole 8a being large and the through holes 8a at both ends being small.
- the main leaf spring 8 ' may be formed with a plurality of holes or grooves that do not penetrate instead of the through hole 8a, and the depth and number of the holes may be changed without changing the size of the holes or grooves. Good. Further, the main plate spring 8 ′ may be formed so that the plate thickness is thick at both ends.
Landscapes
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/224,744 US7737610B2 (en) | 2006-03-08 | 2007-02-13 | Drive apparatus having auxiliary springs |
| KR1020087021028A KR101273699B1 (ko) | 2006-03-08 | 2007-02-13 | 구동장치 |
| JP2008505004A JP5093098B2 (ja) | 2006-03-08 | 2007-02-13 | 駆動装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-062171 | 2006-03-08 | ||
| JP2006062171 | 2006-03-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007105396A1 true WO2007105396A1 (ja) | 2007-09-20 |
Family
ID=38509234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/052482 Ceased WO2007105396A1 (ja) | 2006-03-08 | 2007-02-13 | 駆動装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7737610B2 (ja) |
| JP (1) | JP5093098B2 (ja) |
| KR (1) | KR101273699B1 (ja) |
| CN (1) | CN101401290A (ja) |
| WO (1) | WO2007105396A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7737610B2 (en) | 2006-03-08 | 2010-06-15 | Konica Minolta Opto, Inc. | Drive apparatus having auxiliary springs |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259223A (ja) | 2009-04-24 | 2010-11-11 | Fujifilm Corp | 駆動装置、光学装置及び駆動信号制御回路 |
| JP5358415B2 (ja) * | 2009-12-04 | 2013-12-04 | 富士フイルム株式会社 | 駆動装置及び光学装置 |
| JP5018913B2 (ja) * | 2010-03-01 | 2012-09-05 | ブラザー工業株式会社 | ケーブルの配線構造及び画像読取装置 |
| JP6128868B2 (ja) * | 2012-02-23 | 2017-05-17 | キヤノン株式会社 | 振動型駆動装置及び撮像装置 |
| DE102014014997B4 (de) * | 2014-10-09 | 2018-05-17 | Attocube Systems Ag | Haft-Gleit-Antrieb, insbesondere piezo-aktuierter Trägheitsantrieb |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1084649A (ja) * | 1996-09-10 | 1998-03-31 | Optec Dai Ichi Denko Co Ltd | 端子ブラケット付き円筒形マイクロ振動モータ |
| JPH10225150A (ja) * | 1997-02-10 | 1998-08-21 | Minolta Co Ltd | 駆動装置 |
| JP2000278972A (ja) * | 1999-03-26 | 2000-10-06 | Minolta Co Ltd | 駆動装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6114799A (en) * | 1997-02-10 | 2000-09-05 | Minolta Co., Ltd. | Driving mechanism |
| JP3646154B2 (ja) | 2002-08-21 | 2005-05-11 | コニカミノルタホールディングス株式会社 | 駆動装置 |
| KR101273699B1 (ko) | 2006-03-08 | 2013-06-12 | 코니카 미놀타 어드밴스드 레이어즈 인코포레이티드 | 구동장치 |
-
2007
- 2007-02-13 KR KR1020087021028A patent/KR101273699B1/ko not_active Expired - Fee Related
- 2007-02-13 WO PCT/JP2007/052482 patent/WO2007105396A1/ja not_active Ceased
- 2007-02-13 US US12/224,744 patent/US7737610B2/en not_active Expired - Fee Related
- 2007-02-13 CN CNA200780008289XA patent/CN101401290A/zh active Pending
- 2007-02-13 JP JP2008505004A patent/JP5093098B2/ja not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1084649A (ja) * | 1996-09-10 | 1998-03-31 | Optec Dai Ichi Denko Co Ltd | 端子ブラケット付き円筒形マイクロ振動モータ |
| JPH10225150A (ja) * | 1997-02-10 | 1998-08-21 | Minolta Co Ltd | 駆動装置 |
| JP2000278972A (ja) * | 1999-03-26 | 2000-10-06 | Minolta Co Ltd | 駆動装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7737610B2 (en) | 2006-03-08 | 2010-06-15 | Konica Minolta Opto, Inc. | Drive apparatus having auxiliary springs |
Also Published As
| Publication number | Publication date |
|---|---|
| US7737610B2 (en) | 2010-06-15 |
| KR101273699B1 (ko) | 2013-06-12 |
| US20090026886A1 (en) | 2009-01-29 |
| KR20080102137A (ko) | 2008-11-24 |
| CN101401290A (zh) | 2009-04-01 |
| JP5093098B2 (ja) | 2012-12-05 |
| JPWO2007105396A1 (ja) | 2009-07-30 |
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