WO2015005188A1 - アクチュエータ - Google Patents
アクチュエータ Download PDFInfo
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- WO2015005188A1 WO2015005188A1 PCT/JP2014/067641 JP2014067641W WO2015005188A1 WO 2015005188 A1 WO2015005188 A1 WO 2015005188A1 JP 2014067641 W JP2014067641 W JP 2014067641W WO 2015005188 A1 WO2015005188 A1 WO 2015005188A1
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- actuator
- elastic
- elastic body
- plate
- piezoelectric
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- 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
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/202—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using longitudinal or thickness displacement combined with bending, shear or torsion displacement
- H10N30/2027—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using longitudinal or thickness displacement combined with bending, shear or torsion displacement having cylindrical or annular shape
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- 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
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2041—Beam type
- H10N30/2042—Cantilevers, i.e. having one fixed end
- H10N30/2044—Cantilevers, i.e. having one fixed end having multiple segments mechanically connected in series, e.g. zig-zag type
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- 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
- H10N30/01—Manufacture or treatment
- H10N30/04—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning
- H10N30/045—Treatments to modify a piezoelectric or electrostrictive property, e.g. polarisation characteristics, vibration characteristics or mode tuning by polarising
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- 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
- H10N30/01—Manufacture or treatment
- H10N30/07—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base
- H10N30/072—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by laminating or bonding of piezoelectric or electrostrictive bodies
- H10N30/073—Forming of piezoelectric or electrostrictive parts or bodies on an electrical element or another base by laminating or bonding of piezoelectric or electrostrictive bodies by fusion of metals or by adhesives
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- 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
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
Definitions
- the present invention relates to an actuator for driving various components and members, and more particularly to an actuator that is displaced by a torsional behavior.
- Patent Document 1 discloses an actuator using a bimorph piezoelectric element.
- this actuator two piezoelectric ceramic plates are bonded together.
- One piezoelectric ceramic plate and the other piezoelectric ceramic plate are displaced in opposite directions.
- the actuator bends. Accordingly, when one end of the actuator is fixed, the other end side is displaced.
- An object of the present invention is to provide an actuator capable of increasing the displacement magnification rate.
- the actuator according to the present invention includes a plate-like elastic body and a drive member that displaces the plate-like elastic body.
- the plate-like elastic body has a first main surface and a second main surface opposite to the first main surface.
- the elastic body when the elastic body is viewed in plan from the first main surface side, the elastic body has a shape extending along the arc-shaped center line, and the torsional behavior with the arc-shaped center line as the central axis It transforms with.
- the elastic body has a plurality of elastic plates arranged along a direction in which the arc-shaped center line extends, and the plurality of elastic plates are connected to each other.
- An elastic body is configured.
- a plurality of elastic plates are directly connected.
- the central angle of the arc-shaped center line is 360 °.
- the elastic plates have a length direction, and when viewed in a plan view, the elastic plates are arranged so as to form an angle.
- connection members are alternately arranged on the outer peripheral side or the inner peripheral side in the extending direction of the arc-shaped center line.
- the elastic plate includes a piezoelectric element having a piezoelectric plate and an electrode formed on the piezoelectric plate.
- the elastic body plate has a plurality of piezoelectric elements that vibrate in a bending mode, and the plurality of piezoelectric elements have a meander shape when viewed in plan. Are combined.
- the plate-like elastic body has the above shape and is deformed by torsional behavior, so that the displacement magnification rate can be increased.
- FIG. 1 is a perspective view for explaining an actuator according to a first embodiment of the present invention.
- 2A and 2B are a perspective view for explaining the torsional behavior of the actuator of the first embodiment and an end view for explaining a displacement state viewed from one end of the actuator. is there.
- FIG. 3 is a diagram illustrating a relationship between the central angle of the arc and the displacement amount in the actuator according to the first embodiment.
- FIG. 4 is a schematic plan view for explaining each parameter in the actuator of the first embodiment used to obtain the result shown in FIG.
- FIG. 5 is a perspective view showing one elastic body plate used in the actuator of the first embodiment.
- FIG. 6 is a perspective view showing a piezoelectric element in the elastic plate shown in FIG. FIG.
- FIG. 7 is a cross-sectional view for explaining the bending behavior of the piezoelectric element shown in FIG.
- FIG. 8 is a cross-sectional view for explaining a bending behavior in a piezoelectric element according to a modification.
- FIG. 9 is a cross-sectional view showing the bending behavior of a piezoelectric element according to still another modification.
- FIG. 10 is a schematic perspective view for explaining deformation due to torsional behavior of the elastic plate shown in FIG.
- FIG. 11 is a perspective view for explaining an actuator according to the second embodiment of the present invention.
- FIG. 12 is a perspective view for explaining the displacement behavior of the actuator of the second embodiment shown in FIG.
- FIG. 13 is a perspective view showing a schematic structure of an actuator according to the third embodiment of the present invention.
- FIG. 14 is a perspective view of an actuator according to the fourth embodiment of the present invention.
- FIG. 15 is a perspective view showing a first modification of the actuator element used in the actuator of the present invention.
- FIG. 16 is a perspective view showing the deformation behavior of the actuator element shown in FIG.
- FIG. 17 is a perspective view showing a second modification of the actuator element used in the actuator of the present invention.
- FIG. 18A and FIG. 18B are a perspective view of an actuator according to a fifth embodiment of the present invention and a schematic end view for explaining the deformation behavior on the end face of the actuator.
- FIG. 19 is a perspective view showing the deformation behavior of the actuator of the comparative example.
- FIG. 20 is a diagram showing the relationship between the element length of the actuator of the fifth embodiment shown in FIGS. 18A and 18B and the actuator of the comparative example shown in FIG. 19 and the amount of displacement.
- FIG. 21 is a schematic plan view for explaining each parameter in the actuator of the embodiment used to obtain the result shown in FIG
- FIG. 1 is a perspective view for explaining an actuator according to a first embodiment of the present invention.
- the actuator 1 of this embodiment has a plate-like elastic body 2.
- the elastic body 2 includes a plurality of elastic body plates 3 to 5 and connecting members 6 and 7.
- the elastic body plate 3 and the elastic body plate 4 are connected via the connection member 6.
- the elastic body plate 4 and the elastic body plate 5 are connected via a connection member 7.
- the upper surfaces of the plurality of elastic plates 3 to 5 and the upper surfaces of the connection members 6 and 7 are flush with each other.
- the first main surface of the elastic body 2 is configured.
- the lower surfaces of the elastic plates 3 to 5 and the lower surfaces of the connection members 6 and 7 are also flush.
- the lower surface of the elastic body plates 3 to 5 and the lower surface of the connection members 6 and 7 constitute the second main surface of the elastic body 2.
- Each elastic body plate 3 to 5 is driven by a piezoelectric element to be described later and is deformed by torsional behavior. Details of the elastic plates 3 to 5 will be described later.
- the elastic body plates 3 to 5 have a rectangular plate shape.
- the connecting members 6 and 7 form an isosceles triangle having an apex angle ⁇ 1 when viewed in plan.
- the plurality of elastic plates 3 to 5 are joined via the connection members 6 and 7 so that the apex angle ⁇ 1 of the isosceles triangle is on the same side of the connection members 6 and 7.
- the outer first side surface 2A and the inner second side surface 2B each have an arc shape.
- the arc shape of the first side surface 2A when viewed in plan is a first arc
- the arc shape when the second side surface 2B is viewed in plan is a second arc.
- the center of the first and second arcs is O
- the center angle is ⁇ . That is, the planar shape of the elastic body 2 corresponds to a shape obtained by removing a fan-shaped portion having the central angle ⁇ defined by the second arc from the sector having the central angle ⁇ defined by the first arc.
- the elastic body 2 is configured to be deformed by a torsional behavior with the arc-shaped center line 8 as a central axis.
- the arc-shaped center line 8 is an arc shape centered on the center O and passing through the center between the first arc and the second arc. As shown by a one-dot chain line in FIG.
- the connecting members 6 and 7 are made of an elastic body such as ceramics or metal.
- the elastic plates 3 to 5 are composed of piezoelectric actuator elements to be described later.
- the elastic plates 3 to 5 are each deformed in a torsion mode as shown in FIG. In this case, as shown in FIG. 2A, each of the plurality of elastic plates 3 to 5 is deformed by torsional behavior, so that when one end side is fixed in the entire actuator 1, the amount of displacement on the other side is reduced. growing.
- FIG. 2B is an end view showing the displacement state of the end of the elastic body 2 viewed from the arrow A side in FIG.
- the elastic body 2 when the elastic body 2 is viewed in plan, the elastic body 2 has the first and second side surfaces 2A and 2B that are substantially arc-shaped, and the arc-shaped center line 8 is the central axis. Therefore, when one end side is fixed, the displacement on the other end side can be greatly increased. This will be described with reference to FIGS.
- FIG. 3 is a diagram showing the relationship between the central angle ⁇ and the displacement amount in the actuator 1.
- the results in FIG. 3 are the results when the actuator 1 has the dimensions A1 and A2 and the central angle ⁇ shown in FIG.
- the width direction dimension A2 of the actuator 1 is 2 mm
- the thickness is 0.1 mm.
- the central angle ⁇ was changed.
- the twist angle was set to 1.5 ° / mm. That is, the actuator 1 including the elastic plates 3 to 5 is configured so that the entire elastic body 2 is twisted by 15 °.
- the displacement amount on the vertical axis in FIG. 3 refers to the maximum displacement amount on the other end side when one end side of the elastic body 2 is fixed. This maximum displacement amount is the displacement amount A4 in the vertical direction of the center line 8 in FIG.
- the displacement amount increases as the central angle ⁇ increases. This is because the displacement accumulation effect in the substantially arc-shaped elastic body 2 increases as the central angle ⁇ increases.
- the center angle is greater than or equal to the inflection point C, which is the intersection of the alternate long and short dash lines A5 and A6 in FIG. 3, the displacement amount is relatively increased as the center angle ⁇ increases. Therefore, preferably, ⁇ is 50 ° or more, which is the inflection point C.
- FIG. 5 is a perspective view showing an example of an actuator element constituting the elastic plate 3.
- the actuator element 11 has a structure in which the piezoelectric actuator units 12 and the piezoelectric actuator units 13 are alternately connected via the connecting material 16.
- the connecting members 16 are alternately positioned on one end side or the other end side in the direction in which the piezoelectric actuator units 12 and 13 are arranged. Accordingly, the connecting members 16 are alternately arranged on the outer peripheral side or the inner peripheral side in the extending direction of the arc-shaped center line 8 of the actuator 1.
- the piezoelectric actuator unit 12 has a structure in which a piezoelectric element 15 is laminated on an elastic plate 14.
- the elastic plate 14 can be formed of metal, ceramics, Si, or the like.
- the piezoelectric element 15 has a piezoelectric ceramic plate 15a that is polarized in the thickness direction as indicated by an arrow. Electrodes 15b and 15c are laminated on the upper and lower surfaces of the piezoelectric ceramic plate 15a.
- the piezoelectric ceramic plate 15a is polarized in the thickness direction.
- the piezoelectric ceramic plate 15a can be formed of an appropriate piezoelectric ceramic such as PZT.
- the electrodes 15b and 15c can be formed of an appropriate metal such as Ni, Au, Ag, Cu, or an alloy thereof.
- the connecting material 16 is formed of an elastic body such as ceramic or metal.
- the piezoelectric element 15 When a voltage is applied to the piezoelectric element 15 as shown in FIG. 7, the piezoelectric element 15 is deformed in a bending mode.
- the piezoelectric actuator unit 13 has the same configuration except that the polarization directions of the piezoelectric actuator unit 12 and the piezoelectric ceramic plate 15a are opposite. Therefore, the electrode 15b of the piezoelectric actuator unit 12 and the electrode 15b of the piezoelectric actuator unit 13 are connected in common, connected to one potential, the electrodes 15c on the lower surface side are connected in common, and connected to the potential on the other side. As a result, the piezoelectric actuator unit 12 and the piezoelectric actuator unit 13 are bent in opposite directions.
- FIG. 10 is a schematic perspective view showing the torsional behavior of the actuator element 11.
- the state shown by the broken line in the drawing is deformed by the torsional behavior. That is, the deformation behavior of the elastic plate 3 of FIG. 1 can be realized. Therefore, the entire actuator element 11 is torsionally deformed.
- the elastic plate 3 in the first embodiment can be configured by the actuator element 11.
- the remaining elastic plates 4 and 5 can also be configured by the actuator element 11 in the same manner.
- a piezoelectric actuator unit 17 having a bimorph structure shown in FIG. 8 may be used.
- piezoelectric elements 19 and 20 are laminated on both surfaces of the elastic plate 18.
- the piezoelectric elements 19 and 20 have piezoelectric ceramic plates 19a and 20a and electrodes 19b, 19c, 20b and 20c, respectively.
- the polarization directions of the piezoelectric element 19 and the piezoelectric element 20 are the same.
- voltages having opposite polarities are applied to the piezoelectric element 19 and the piezoelectric element 20. In this way, the piezoelectric actuator unit 17 having a bimorph structure can be bent and displaced.
- the actuator 1 of the present embodiment can obtain a large amount of displacement by deforming the elastic body 2 by a torsional behavior.
- the driving member that drives the elastic body 2 in a torsional behavior is the piezoelectric element 15 integrated with the elastic body 2.
- the driving member for driving the elastic plate may be integrated with the elastic body, or may be constituted by a member separate from the elastic body.
- FIG. 11 is a perspective view for explaining an actuator according to a second embodiment of the present invention.
- the elastic body has a structure in which a plurality of elastic plates 32 are connected via a connecting member 33.
- Each elastic body plate 32 can be configured similarly to the elastic body plate 3 of the first embodiment.
- the connection member 33 is the same as the connection members 6 and 7 of the first embodiment.
- the difference between the actuator 31 of the second embodiment and the actuator 1 of the first embodiment is that the center angle ⁇ of the aforementioned arc is about 360 °. That is, in the actuator 31, the one end 31a and the other end 31b are abutted to form an annular shape. In other words, in the actuator 1 of the first embodiment, the actuator 31 of the second embodiment has a center angle ⁇ of about 360 °.
- FIG. 12 is a diagram showing the displacement behavior in the actuator 31.
- FIG. 12 is a diagram showing the displacement behavior in the actuator 31.
- the displacement increases as the central angle ⁇ increases.
- the central angle ⁇ is about 360 °
- a large amount of displacement can be obtained as shown in FIG.
- the generated twist angle between the elastic plates facing each other with the center O as the center is canceled.
- the coordinates of the one end 31a and the other end 31b in the plane direction are the same, and a displacement difference only in the direction perpendicular to the plane occurs. That is, the actuator 31 can be linearly driven by setting the central angle ⁇ to about 360 °.
- FIG. 13 is a perspective view showing a schematic structure of an actuator 41 according to the third embodiment of the present invention.
- the actuator 41 a plurality of piezoelectric actuator units 43 and piezoelectric actuator units 44 are alternately connected to constitute a substantially annular plate-like elastic body 42. That is, the actuator 41 has a central angle ⁇ of about 360 ° as in the case of the second embodiment.
- the actuator 41 does not use a connecting member, and the elastic body 42 is configured by directly joining a plurality of piezoelectric actuator units 43 and 44.
- Each piezoelectric actuator unit 43 has the same configuration as the piezoelectric actuator units 12, 17, and 21. Furthermore, when seen in a plan view, it has an isosceles trapezoidal shape and has a length direction.
- the piezoelectric actuator unit 44 has the same configuration as that of the piezoelectric actuator unit 43, and the bending direction is reversed.
- the piezoelectric actuator unit 43 and the piezoelectric actuator unit 44 having a length direction are joined so that the bottom side of the piezoelectric actuator unit 43 is in contact with one oblique side of the adjacent piezoelectric actuator unit 44. This bonding can be achieved by an appropriate method such as diffusion bonding or a bonding method using a bonding agent.
- the elastic body 42 has a substantially arc-shaped center line extending in the length direction.
- the piezoelectric actuator unit 43 is bent, and at the same time, the piezoelectric actuator unit 44 is driven to bend in a direction opposite to that of the piezoelectric actuator unit 43, the entire elastic body 42 is twisted and greatly displaced. Therefore, when one end is fixed, the state shown by the broken line in FIG. 13 is displaced to the state shown by the solid line.
- a larger displacement amount can be obtained.
- FIG. 14 is a perspective view of an actuator according to the fourth embodiment of the present invention.
- the actuator 51 of this embodiment corresponds to a modification of the actuator 31 of the second embodiment.
- the elastic body 52 has a center line P passing through the center in the width direction and extending in the length direction having an arc shape.
- the elastic body 52 has a structure in which piezoelectric actuator units 53, connection members 56, piezoelectric actuator units 54, and connection members 55 are alternately connected.
- the piezoelectric actuator unit 53 has the same configuration as the piezoelectric actuator units 12, 17, and 21, and the piezoelectric actuator unit 54 has the same configuration as the piezoelectric actuator unit 53, and the bending direction is reversed.
- the connection member 55 is substantially the same as the connection member 33 of the second embodiment.
- connection member 55 extends radially outward from the inner peripheral surface of the elastic body 52, but does not reach the outer peripheral surface of the elastic body 52. That is, it is located inside the arcuate center line P.
- connection member 56 connects the piezoelectric actuator units 53 and 54 on the outer peripheral surface side of the elastic body 52. In the circumferential direction, the connection members 55 and the connection members 56 are alternately positioned.
- the connecting member 55 and the connecting member 56 are alternately arranged on the outer peripheral side or the inner peripheral side in the direction in which the arc-shaped center line extends. Then, when the plate-like elastic body 52 is viewed in plan, a plurality of piezoelectric actuator units 53 and 54 are coupled via connection members 55 and 56 so as to have a meandering shape.
- the aforementioned central angle in the elastic body 52 formed by connecting the piezoelectric actuator units 53 and 54 is about 360 °.
- the center angle may be an angle smaller than 360 °.
- each elastic plate is not limited to the actuator element 11 shown in FIG. 5, but can be composed of various piezoelectric actuator elements or other actuator elements other than the piezoelectric actuator elements. A modification of such an actuator element will be described with reference to FIGS.
- FIG. 15 is a perspective view showing a first modification of the piezoelectric actuator element used in the actuator of the present invention.
- the piezoelectric actuator element 61 has a piezoelectric ceramic plate 62.
- the piezoelectric ceramic plate 62 has a rectangular plate shape.
- the piezoelectric ceramic plate 62 has a first end surface 62a and a second end surface 62b.
- the piezoelectric ceramic plate 62 is polarized in the direction connecting the first end face 62a and the second end face 62b.
- the polarization direction arrow P1 on one side of the broken line 63 and the polarization direction arrow P2 on the other side are in opposite directions.
- An electrode 64 is formed on the upper surface of the piezoelectric ceramic plate 62, and an electrode 65 is formed on the lower surface.
- a DC voltage is applied between the electrodes 64 and 65, as shown in FIG. 16, one side opposite to the broken line 63 is displaced in the reverse direction in the thickness shear mode. Therefore, the entire piezoelectric actuator element 61 is deformed by torsional behavior.
- FIG. 17 is a perspective view showing a second modification of the piezoelectric actuator element used in the actuator of the present invention.
- a piezoelectric ceramic plate 72 is used in the piezoelectric actuator element 71.
- the piezoelectric ceramic plate 72 has first to third regions 73 to 75 extending in a direction connecting the first end surface 72a and the second end surface 72b.
- the first to third regions 73 to 75 connect the first end surface 72a and the second end surface 72b, respectively.
- a second region 74 is arranged in the center, and the second region 74 is polarized in the thickness direction as shown by the arrows in the figure.
- the first region 73 and the third region 75 are polarized in opposite directions in the direction connecting the first and second end faces 72a and 72b.
- An electrode 76 is formed on the upper surface of the piezoelectric ceramic plate 72, and an electrode 77 is formed on the lower surface.
- the central second region 74 is displaced in the bending mode. Therefore, the entire piezoelectric ceramic plate 72 is deformed by torsional behavior.
- the actuator element may be configured using a displacement using the thickness-slip mode.
- a plurality of elastic plates that deform by torsional behavior, when one end is fixed, an actuator that deforms by torsional behavior that greatly displaces the other end is configured. Can do.
- a plurality of elastic plates may be connected directly or indirectly to form an elastic body, but the fifth embodiment shown in FIGS. 18 (a) and 18 (b) may be used.
- one elastic plate may be deformed by the twisting behavior as described above.
- the actuator 81 has an elastic plate 82.
- the elastic body plate 82 has a length direction and a width direction.
- a center line 83 passing through the center in the width direction and extending in the length direction of the elastic plate 82 has an arcuate shape as in the actuators of the first to third embodiments.
- This arc-shaped center line 83 becomes the torsional central axis, and the elastic body plate 82 is deformed by the torsional behavior. That is, the elastic plate 82 is displaced from the state indicated by the broken line to the state indicated by the solid line when the one end 82a is fixed and deformed by the torsional behavior.
- FIG. 18B is an end view showing a displacement state as viewed from the other end portion 82b side.
- the elastic plate 102 constituting the actuator 101 of this comparative example has an arc-shaped center line.
- the structure of the elastic plate 102 is, for example, substantially the same as the piezoelectric actuator unit 12 described above and has a unimorph structure, and the whole is driven to bend.
- this elastic plate 102 when one end side is fixed, the other end is displaced from a state indicated by a broken line to a state indicated by a solid line. That is, it is displaced in the bending mode.
- the actuator 101 that is displaced in such a bending mode was used as a comparative example.
- FIG. 20 shows the relationship between the length of the outer side surface of the actuator 81 and the actuator 101 of the comparative example and the amount of displacement.
- the solid line shows the result of the actuator 81 of the above embodiment
- the broken line shows the result of the comparative example.
- the amount of displacement can be dramatically increased by increasing the length of the element as compared with the comparative example.
- the center line extending in the length direction can dramatically increase the amount of displacement by deforming the arc-shaped elastic body in a torsional behavior.
- one elastic plate may be deformed by a torsional behavior, and in that case, the number of parts can be reduced and the amount of displacement can be further increased. It can be seen that
- piezoelectric actuator elements 62a, 72a, 82a ... first 1 end face 62b, 72b, 82b ... 2nd end face 63 ... broken line 64, 65 ... electrode 73-75 ... 1st-3rd area
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Abstract
Description
2…弾性体
2A…第1の側面
2B…第2の側面
3~5…弾性体板
6,7…接続部材
8…中心線
11…アクチュエータ素子
12,13、17、21、43、44、53、54…圧電アクチュエータユニット
14、18…弾性板
15、19、20…圧電素子
15a、19a,20a、62,72,…圧電セラミック板
15b,15c、19b,19c,20b,20c…電極
16…接続材
31a…一端
31b…他端
32,42,52…弾性体板
33、55、56…接続部材
61,71,81…圧電アクチュエータ素子
62a,72a,82a…第1の端面
62b,72b,82b…第2の端面
63…破線
64,65…電極
73~75…第1~第3の領域
76,77…電極
83…中心線
Claims (9)
- 第1の主面と、前記第1の主面とは反対側の第2の主面とを有する板状の弾性体と、
前記板状の弾性体を変位させる駆動部材とを備え、
前記弾性体が前記第1の主面側から平面視した場合、円弧状の中心線に沿って延ばされた形状を有し、該円弧状の中心線を中心軸としたねじり挙動で変形する、アクチュエータ。 - 前記弾性体が、前記円弧状の中心線の延びる方向に沿って配置された複数の弾性体板を有し、前記複数の弾性体板が連結されて前記弾性体が構成されている、請求項1に記載のアクチュエータ。
- 前記複数の弾性体板において、隣り合う弾性体板が接続部材を介して連結されている、請求項2に記載のアクチュエータ。
- 前記複数の弾性体板が直接連結されている、請求項2に記載のアクチュエータ。
- 前記円弧状の中心線の中心角が360°である、請求項1~3のいずれか1項に記載のアクチュエータ。
- 前記弾性体板が長さ方向を有し、平面視した場合、隣り合う弾性体板がある角度をなすように連ねられている、請求項1~5のいずれか1項に記載のアクチュエータ。
- 前記接続部材が、前記円弧状の中心線の延びる方向において、交互に外周側または内周側に配置されている、請求項3に記載のアクチュエータ。
- 前記弾性体板が、圧電板と、前記圧電板に形成された電極とを有する圧電素子を有する、請求項1~7のいずれか1項に記載のアクチュエータ。
- 前記弾性体板が、屈曲モードで振動する複数の圧電素子を有し、かつ平面視した場合、ミアンダ状の形状となるように複数の圧電素子が結合されている、請求項7に記載のアクチュエータ。
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CN201480038945.0A CN105453289A (zh) | 2013-07-08 | 2014-07-02 | 致动器 |
JP2015526279A JPWO2015005188A1 (ja) | 2013-07-08 | 2014-07-02 | アクチュエータ |
US14/988,053 US20160133824A1 (en) | 2013-07-08 | 2016-01-05 | Actuator |
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JP2013142252 | 2013-07-08 | ||
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US14/988,053 Continuation US20160133824A1 (en) | 2013-07-08 | 2016-01-05 | Actuator |
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CN110429175B (zh) * | 2019-07-29 | 2023-04-07 | 中船重工海声科技有限公司 | 一种扭转振动晶片和制造方法 |
CN111969888B (zh) * | 2020-08-07 | 2022-05-31 | 深圳市汇顶科技股份有限公司 | 压电电机和芯片的防抖装置 |
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JP2005507323A (ja) * | 2001-11-02 | 2005-03-17 | 1...リミテッド | 湾曲した電気起動のアクチュエータ |
JP2008113536A (ja) * | 2006-10-27 | 2008-05-15 | Kazumasa Onishi | ねじりー拡縮振動変換装置 |
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DE3448414C3 (de) * | 1983-02-23 | 2003-07-17 | Canon Kk | Vibrationswellenantriebseinrichtung |
WO1987005166A1 (en) * | 1986-02-18 | 1987-08-27 | Matsushita Electric Industrial Co., Ltd. | Ultrasonic motor |
JP2638856B2 (ja) * | 1987-11-11 | 1997-08-06 | 松下電器産業株式会社 | 超音波モータ |
JP2542154B2 (ja) * | 1992-11-26 | 1996-10-09 | 山一電機株式会社 | 圧電アクチェ―タ― |
FR2701340B1 (fr) * | 1993-02-05 | 1995-03-24 | Imra Europe Sa | Procédé de réalisation d'un circuit de distribution de signaux électriques, circuit de distribution obtenu et moteur piézoélectrique comportant un tel circuit. |
JPH07115782A (ja) * | 1993-10-13 | 1995-05-02 | Canon Inc | 振動波駆動装置 |
CN100414092C (zh) * | 1997-11-27 | 2008-08-27 | 佳能株式会社 | 振动型致动器和振动型驱动装置 |
US6262515B1 (en) * | 2000-02-18 | 2001-07-17 | Honeywell International, Inc. | Piezoelectric wave motor |
US6943481B2 (en) * | 2001-06-05 | 2005-09-13 | Canon Precision Kabushiki Kaisha | Vibration member and vibration wave driving apparatus |
GB0123294D0 (en) * | 2001-09-27 | 2001-11-21 | 1 Ltd | Piezoelectric structures |
JP2006280047A (ja) * | 2005-03-28 | 2006-10-12 | Nikon Corp | 振動アクチュエータ装置及びレンズ鏡筒 |
EP1941608B1 (en) * | 2005-10-28 | 2013-02-13 | PCB Motor Aps | An electro-mechanical wave device |
JP5256762B2 (ja) * | 2008-02-08 | 2013-08-07 | 株式会社ニコン | レンズ鏡筒、カメラ |
EP2284984B1 (en) * | 2008-05-27 | 2016-01-06 | Murata Manufacturing Co. Ltd. | Ultrasonic motor |
KR101067316B1 (ko) * | 2009-06-22 | 2011-09-23 | 주식회사 아이노바 | 돔 형상의 선형 압전 모터 |
JP2015135957A (ja) * | 2013-12-18 | 2015-07-27 | キヤノン株式会社 | 圧電素子、積層圧電素子、液体吐出装置、超音波モータ |
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2014
- 2014-07-02 JP JP2015526279A patent/JPWO2015005188A1/ja active Pending
- 2014-07-02 CN CN201480038945.0A patent/CN105453289A/zh active Pending
- 2014-07-02 WO PCT/JP2014/067641 patent/WO2015005188A1/ja active Application Filing
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2016
- 2016-01-05 US US14/988,053 patent/US20160133824A1/en not_active Abandoned
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JP2005507323A (ja) * | 2001-11-02 | 2005-03-17 | 1...リミテッド | 湾曲した電気起動のアクチュエータ |
JP2008113536A (ja) * | 2006-10-27 | 2008-05-15 | Kazumasa Onishi | ねじりー拡縮振動変換装置 |
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JPWO2015005188A1 (ja) | 2017-03-02 |
CN105453289A (zh) | 2016-03-30 |
US20160133824A1 (en) | 2016-05-12 |
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