WO2020241387A1 - マルチレイヤー構造を有する静電アクチュエータ - Google Patents
マルチレイヤー構造を有する静電アクチュエータ Download PDFInfo
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- WO2020241387A1 WO2020241387A1 PCT/JP2020/019839 JP2020019839W WO2020241387A1 WO 2020241387 A1 WO2020241387 A1 WO 2020241387A1 JP 2020019839 W JP2020019839 W JP 2020019839W WO 2020241387 A1 WO2020241387 A1 WO 2020241387A1
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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
- H10N30/206—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using only longitudinal or thickness displacement, e.g. d33 or d31 type devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/002—Electrostatic motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B3/00—Devices comprising flexible or deformable elements, e.g. comprising elastic tongues or membranes
-
- 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
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/204—Di-electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
-
- 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
- H10N30/85—Piezoelectric or electrostrictive active materials
- H10N30/857—Macromolecular compositions
Definitions
- the present invention relates to an electrostatic actuator having a multi-layer structure.
- the dielectric elastomer actuator has a drive element A having a structure in which an elastomer is sandwiched between a pair of stretchable electrodes and an elastomer between the pair of stretchable electrodes.
- a drive element B having a structure sandwiching the drive element B and a connecting portion for connecting the drive element A and the drive element B in series are provided, and when a voltage is applied between the pair of electrodes of the drive element A and the drive element B, A dielectric elastomer actuator and a dielectric elastomer actuator in which the electric field generated between the pair of electrodes displaces the pair of electrodes in a direction parallel to the electric field and the elastomer extends in a direction perpendicular to the electric field, and the elongation of the elastomer interacts with each other through the connection.
- Patent Document 1 There is a technique for disclosing a publication regarding the drive system.
- a conventional electrostatic actuator has a structure in which a dielectric elastomer, which is an elastic material, is sandwiched between conductor layers, and the conductor layers are contracted by an electrostatic attraction generated by applying a voltage between the opposing conductor layers. It was.
- the dielectric elastomer also served as an insulating material between the conductor layers.
- a voltage is applied to the electrostatic actuator for a long time and a compressive force is applied to the dielectric elastomer by electrostatic attraction for a long time, if the dielectric elastomer is soft, the dielectric elastomer spreads laterally together with the conductor, and the dielectric elastomer due to the creep phenomenon.
- the conventional electrostatic actuator cannot be used for a long period of time, and it is difficult to put it into practical use.
- a dielectric elastomer having a hard elastic performance is adopted, there is a problem that the shrinkage rate is lowered and a sufficient stroke cannot be secured.
- the laminated electrostatic actuator according to claim 1 has a structure in which a plurality of electrode films are laminated and bonded, Each electrode film has a five-layer structure of an elastic layer, an insulating layer, a conductor layer, an insulating layer, and an elastic layer.
- the Young's modulus of the material constituting the elastic layer is smaller than the Young's modulus of the material constituting the insulating layer.
- the laminated electrostatic actuator according to claim 2 has a structure in which a plurality of electrode films are laminated and bonded, Each electrode film has a five-layer structure of an elastic layer, an insulating layer, a conductor layer, an insulating layer, and an elastic layer.
- the spring constant of the material constituting the elastic layer increases as the electrode film stretches in the stacking direction.
- the laminated electrostatic actuator according to claim 3 is In the electrostatic actuator according to claim 1 or 2.
- the elastic layers of the electrode films are connected by adhesion, covalent bond, or elastic adhesive force.
- the laminated electrostatic actuator according to claim 4 has a structure in which electrode layers in which insulating layers are arranged on both sides of a conductor layer are laminated and bonded via an elastic layer.
- the Young's modulus of the material constituting the elastic layer is smaller than the Young's modulus of the material constituting the insulating layer, or The spring constant of the material constituting the elastic layer increases as the electrostatic actuator extends in the stacking direction.
- the laminated electrostatic actuator according to claim 5 is In the electrostatic actuator according to claim 4,
- the elastic layer is a structure having a plurality of columns separated from each other in the plane direction of the electrode layer.
- the elastic layer when a voltage is applied between the electrodes, the elastic layer is softly deformed, but the conductor layer is protected by an insulating layer. Even if the elastic layer is deformed by the creep phenomenon when a voltage is applied for a long period of time, the conductor layer can be kept insulated by the insulating layer. As a result, it has become possible to use an elastic material having soft elastic performance, and it has become possible to achieve both sufficient stroke and reliability.
- FIG. 5 is a cross-sectional view of the entire laminated electrostatic actuator having a structure in which the electrode films shown in FIG. 1 are laminated and bonded. It is a figure which shows the state which the space between the electrode films is extended by applying the external force in the direction which tries to separate a stack between two end members. It is a figure which shows the state which the interval of the electrode film is contracted by applying a voltage. It is sectional drawing of the laminated type electrostatic actuator which concerns on 2nd Embodiment. This is a modified example of the laminated electrostatic actuator shown in FIG.
- FIG. 1 is a cross-sectional view of one layer of an electrode film 10 constituting the laminated electrostatic actuator 1 according to the first embodiment.
- FIG. 2 is a cross-sectional view of the entire laminated electrostatic actuator 1 having a structure in which the electrode films 10 shown in FIG. 1 are laminated and bonded.
- the laminated electrostatic actuator 1 is configured by laminating and bonding a large number of electrode films 10a and 10b sandwiched between two end members (not shown) (FIG. 2, described later).
- each of the electrode films 10a and 10b has a five-layer structure including a first elastic layer 11a, a first insulating layer 12a, a conductor layer 13a, a second insulating layer 14a, and a second elastic layer 15a. It is composed of.
- the first insulating layer 12a, the conductor layer 13a, and the second insulating layer 14a may be referred to as an electrode layer 16a.
- the conductor layers 13 and 13a are composed of, for example, a metal film such as copper, a conductive polymer, or a film having good electrical conductivity such as a conductive carbon homogeneity (or a conductive mixture mainly composed of carbon). ..
- Insulating layers are formed on both surfaces of the conductor layers 13 and 13a by coating, adhesion or vapor deposition, and the conductor layers 13 and 13a are combined with the first insulating layer 12 , 12a and the second insulating layers 14, 14a constitute the electrode layers 16, 16a.
- an insulating polymer material such as parylene (registered trademark) may be used, and a ceramic or glass material having good withstand voltage characteristics may be used. Etc. may be used.
- the thickness of the electrode layers 16 and 16a is, for example, several micrometers.
- the material constituting the first elastic layers 11, 11a and the second elastic layers 15, 15a Young's modulus smaller than the Young's modulus of the materials constituting the first insulating layers 12, 12a and the second insulating layers 14, 14a is smaller.
- a material having a modulus may be adopted.
- a material constituting the first elastic layers 11, 11a and the second elastic layers 15, 15a a material having a property that the spring constant increases as the laminated electrostatic actuator 1 extends in the stacking direction is adopted. You may.
- the electrode films 10a and 10b having the above configurations are laminated and coupled to form the laminated electrostatic actuator 1.
- the laminated bond is performed, for example, by a covalent bond between elastic layers or an elastic body adhesive force.
- the electrode layer in which the insulating layers are arranged on both sides of the conductor layer may be laminated and bonded via the elastic layer to form an electrostatic actuator.
- FIG. 3 is a diagram showing a state in which an external force in a direction for separating the laminate is applied between two end members (not shown) to extend the distance between the electrode films 10a and 10b
- FIG. 4 is a diagram showing a voltage. It is a figure which shows the state which the space between the electrode films 10a and 10b is contracted by applying.
- the elastic layers 15a and 11b between the first electrode film 10a and the second electrode film 10b are elongated in the laminating direction and at the same time perpendicular to the laminating direction. It is recessed inward between the electrode films (Fig. 3).
- a voltage is applied between the conductor layers 13a and 13b of the first and second electrode films 10a and 10b, the first and second electrode films 10a and 10b attract each other, and the elastic layers 15a and 11b are in the stacking direction. At the same time, it shrinks to the outside and swells outward between the electrode films 10a and 10b perpendicular to the stacking direction (FIG. 4).
- the elastic layers 15a and 11b When a voltage is applied, the elastic layers 15a and 11b are deformed, but the conductor layers 13a and 13b are protected by the insulating layers 14a and 12b. Therefore, even if the elastic layers 15a and 11b are creeped by applying a voltage for a long time, dielectric breakdown occurs due to the presence of the insulating layers 14a and 12b between the conductor layers 13a and 13b and the elastic layers 15a and 11b. The insulation performance of the conductor layers 13a and 13b is ensured. As a result, it becomes possible to use a soft material for the elastic layers 15a and 11b, and it is possible to secure a sufficient stroke as an electrostatic actuator and to achieve both reliability in insulation performance.
- FIG. 5 is a cross-sectional view of the laminated electrostatic actuator 101 according to the second embodiment.
- FIG. 6 is a modified example of the laminated electrostatic actuator 101 shown in FIG.
- the same or similar elements as those of the laminated electrostatic actuator 1 according to the first embodiment are designated by the same or similar reference numerals, and the description thereof will be omitted.
- the laminated electrostatic actuator 101 is configured by laminating and bonding electrode layers 116 in which insulating layers 112 and 114 are arranged on both sides of a conductor layer 113 via an elastic layer 115.
- the elastic layer 115 has a plurality of columns 121a and 121b separated from each other in the plane direction of the electrode layer 116 having voids 120a and 120b inside.
- the amount of deformation in the vicinity of the outer peripheral surface of the elastic layer bulging outward becomes large, and the elastic layers 11 and 15 in the vicinity of the outer peripheral surface of the laminated electrostatic actuator 1 are particularly large. A large stress is generated at the connection portion between the elastic layers 11 and 15 and the insulating layers 12 and 14 (see FIG. 4).
- the individual columns 121a and 121b are deformed independently, so that the amount of deformation of the individual columns 121a and 121b is reduced, and the elastic layer The stress generated in 115 can be reduced.
- the pillars 121 may be connected at the ends (FIG. 6 (a)), or may be individually and independently connected to the insulating layers 114a and 112b (FIG. 6 (b)). Further, the number of columns, the cross-sectional shape, and the position are appropriately set according to the size of the surface of the electrode layer, the size of the force applied to the laminated electrostatic actuator, the required response performance, and the like.
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Abstract
Description
複数の電極フィルムが積層結合した構造を有し、
各電極フィルムは、弾性層、絶縁層、導体層、絶縁層、弾性層の5層構造を有し、
弾性層を構成する材料のヤング率は、絶縁層を構成する材料のヤング率よりも小さい。
複数の電極フィルムが積層結合した構造を有し、
各電極フィルムは、弾性層、絶縁層、導体層、絶縁層、弾性層の5層構造を有し、
弾性層を構成する材料のばね定数は、電極フィルムが積層方向に伸長するのに伴い増加する。
請求項1又は2に記載の静電アクチュエータにおいて、
隣り合う2つの電極フィルムは、電極フィルムの弾性層間が接着或いは共有結合又は弾性体粘着力により接続されている。
導体層の両面に絶縁層が配された電極層が弾性層を介して積層結合した構造を有し、
弾性層を構成する材料のヤング率は、絶縁層を構成する材料のヤング率よりも小さい、或いは、
弾性層を構成する材料のばね定数は、静電アクチュエータが積層方向に伸長するのに伴い増加する。
請求項4に記載の静電アクチュエータにおいて、
弾性層は、電極層の面方向に互いに離間した複数の柱を有する構造体である。
本発明の一実施形態を図面を用いて以下に説明する。図1は、第1実施形態に係る積層型静電アクチュエータ1を構成する電極フィルム10一層の断面図である。図2は、図1に示す電極フィルム10が積層結合した構造を有する積層型静電アクチュエータ1全体の断面図である。
積層型静電アクチュエータ1は、2つの端部材(図示省略)に挟まれた、多数の電極フィルム10a,10bが積層結合されて構成される(図2、後述)。各電極フィルム10a,10bは、図1に示すように、第1弾性層11a、第1絶縁層12a、導体層13a、第2絶縁層14a、第2弾性層15aからなる5層構造を有して構成される。以下の説明では、第1絶縁層12aと導体層13aと第2絶縁層14aとを電極層16aと称することがある。
図3は、2つの端部材(図示省略)の間に積層を離そうとする向きの外力が印加されて電極フィルム10a,10bの間隔が伸長した状態を示す図であり、図4は、電圧が印加されて電極フィルム10a,10bの間隔が収縮した状態を示す図である。
図5は、第2実施形態に係る積層型静電アクチュエータ101の断面図である。図6は、図5に示す積層型静電アクチュエータ101の変形例である。第1実施形態に係る積層型静電アクチュエータ1との同一又は類似の要素については、同一又は類似の符号を付して説明を省略する。図5に示すように、積層型静電アクチュエータ101は、導体層113の両面に絶縁層112,114が配された電極層116が弾性層115を介して積層結合されて構成される。弾性層115は、内部に空隙120a,120bを設けた電極層116の面方向に互いに離間した複数の柱121a,121bを有する。
101:積層型静電アクチュエータ、112,114,114a,112b:絶縁層、113:導体層、115:弾性層、116:電極層、120a,120b:空隙、121a,121b:柱
Claims (5)
- 複数の電極フィルムが積層結合した構造を有する静電アクチュエータであって、
各電極フィルムは、弾性層、絶縁層、導体層、絶縁層、弾性層の5層構造を有し、
前記弾性層を構成する材料のヤング率は、前記絶縁層を構成する材料のヤング率よりも小さい、静電アクチュエータ。 - 複数の電極フィルムが積層結合した構造を有する静電アクチュエータであって、
各電極フィルムは、弾性層、絶縁層、導体層、絶縁層、弾性層の5層構造を有し、
前記弾性層を構成する材料のばね定数は、前記電極フィルムが積層方向に伸長するのに伴い増加する、静電アクチュエータ。 - 請求項1又は2に記載の静電アクチュエータにおいて、
隣り合う2つの前記電極フィルムは、当該電極フィルムの前記弾性層間が接着或いは共有結合又は弾性体粘着力により接続されている、静電アクチュエータ。 - 導体層の両面に絶縁層が配された電極層が弾性層を介して積層結合した構造を有する静電アクチュエータであって、
前記弾性層を構成する材料のヤング率は、前記絶縁層を構成する材料のヤング率よりも小さい、或いは、
前記弾性層を構成する材料のばね定数は、前記静電アクチュエータが積層方向に伸長するのに伴い増加する、静電アクチュエータ。 - 請求項4に記載の静電アクチュエータにおいて、
前記弾性層は、前記電極層の面方向に互いに離間した複数の柱を有する構造体である、静電アクチュエータ。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US17/614,695 US20220224251A1 (en) | 2019-05-31 | 2020-05-20 | Electrostatic actuator having multilayer structure |
CN202080039079.2A CN113906665A (zh) | 2019-05-31 | 2020-05-20 | 具有多层构造的静电致动器 |
KR1020217041145A KR20220016107A (ko) | 2019-05-31 | 2020-05-20 | 멀티레이어 구조를 갖는 정전 액추에이터 |
JP2021522256A JPWO2020241387A1 (ja) | 2019-05-31 | 2020-05-20 | |
EP20813125.0A EP3979486A4 (en) | 2019-05-31 | 2020-05-20 | ELECTROSTATIC ACTUATOR WITH MULTILAYER STRUCTURE |
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JP2019-102866 | 2019-05-31 | ||
JP2019102866 | 2019-05-31 |
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EP (1) | EP3979486A4 (ja) |
JP (1) | JPWO2020241387A1 (ja) |
KR (1) | KR20220016107A (ja) |
CN (1) | CN113906665A (ja) |
TW (1) | TW202121822A (ja) |
WO (1) | WO2020241387A1 (ja) |
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2020
- 2020-05-20 JP JP2021522256A patent/JPWO2020241387A1/ja active Pending
- 2020-05-20 KR KR1020217041145A patent/KR20220016107A/ko not_active Application Discontinuation
- 2020-05-20 CN CN202080039079.2A patent/CN113906665A/zh active Pending
- 2020-05-20 US US17/614,695 patent/US20220224251A1/en not_active Abandoned
- 2020-05-20 EP EP20813125.0A patent/EP3979486A4/en not_active Withdrawn
- 2020-05-20 WO PCT/JP2020/019839 patent/WO2020241387A1/ja unknown
- 2020-05-27 TW TW109117669A patent/TW202121822A/zh unknown
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JP2017022926A (ja) * | 2015-07-14 | 2017-01-26 | 国立大学法人東京工業大学 | 静電アクチュエータおよび静電アクチュエータの製造方法 |
JP2017183814A (ja) * | 2016-03-28 | 2017-10-05 | 住友理工株式会社 | 静電型トランスデューサ |
JP2018033293A (ja) | 2016-08-19 | 2018-03-01 | ローム株式会社 | 誘電エラストマーアクチュエータおよびその駆動システム |
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JPWO2020241387A1 (ja) | 2020-12-03 |
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KR20220016107A (ko) | 2022-02-08 |
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