WO2015194060A1 - 駆動装置 - Google Patents
駆動装置 Download PDFInfo
- Publication number
- WO2015194060A1 WO2015194060A1 PCT/JP2014/077475 JP2014077475W WO2015194060A1 WO 2015194060 A1 WO2015194060 A1 WO 2015194060A1 JP 2014077475 W JP2014077475 W JP 2014077475W WO 2015194060 A1 WO2015194060 A1 WO 2015194060A1
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- WO
- WIPO (PCT)
- Prior art keywords
- spring
- movable member
- base
- drive device
- base member
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/061—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element
- F03G7/0614—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like characterised by the actuating element using shape memory elements
- F03G7/06143—Wires
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
- F03G7/065—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like using a shape memory element
Definitions
- the present invention relates to a drive device using a shape memory alloy mainly used for a vibration generating actuator or the like.
- a driving device that uses the characteristics of a shape memory alloy, that is, a driving device that uses a characteristic that contracts when heated to a certain temperature (operating temperature) or more by energization even when deformed by applying force (for example, (See Patent Document 1).
- This drive device has an insulating base member having an operation base portion composed of one or a plurality of operation recesses on the upper surface portion, and an operation projection portion that faces the base member and is inserted into the operation recess portion on the facing surface portion.
- a shape memory alloy material that is provided with a movable member and contracts due to heat generation when energized between the opposing surface portions is arranged in a curved state in accordance with the operation recess of the base member.
- the drive device includes an urging unit that urges the movable member toward the base member.
- the movable member is pressed against the base member, and the movable member and the base member overlap to operate.
- the convex portion is in contact with the shape memory alloy material.
- the shape memory alloy wire is energized and heated to a certain temperature or higher from that state, the shape memory alloy wire contracts due to superelasticity, and the mover is pushed away from the base member by being pushed by the shape memory alloy material. Move relative.
- each shape memory alloy wire returns to a curved shape (non-energized shape).
- the movable member is urged toward the base member by the urging means. Therefore, the movement (startup) of the movable member is applied in addition to the load from the casing. There is a problem that a force that opposes the urging force of the urging means is required and the load on the shape memory alloy member is large. Further, in this type of conventional drive device, since the movable member is urged toward the base member by the urging means, the initial movement speed when the drive device is started from a completely stopped state is suppressed and stopped. There is a problem that the responsiveness from the state to the start of operation is hindered.
- the distance between the mounting substrate on which the driving device is mounted and the driven object driven by the driving device is wider than the total height of the driving device when not energized due to tolerances. In that case, there is a possibility that a slight gap may be formed between the pressing surface of the movable member and the driven object. If a slight gap is generated in this way, when the driving device is operated, the driving force by the driving device is not transmitted to the driven object by the amount of the gap, so-called idle shooting may occur, which may cause abnormal noise or the like. was there.
- the present invention provides a shape memory alloy member that has less burden on the shape memory alloy member, has excellent initial motion performance, and can mount the movable member and the driven object without any gap. It was made for the purpose of providing the drive device used.
- a base member having an operation base portion including one or a plurality of operation recesses on a surface portion, and A movable member that is disposed so as to face the base member and has an operation convex portion that is inserted into the operation concave portion on the opposite surface side, and generates heat when energized between the base member and the movable member.
- the driving apparatus includes a spring body that is supported by a base member and biases the movable member in the direction of separation.
- the base member includes a spring support portion on a side portion of the operation base portion, and the movable member faces an upper surface of the spring support portion.
- a flange-like push-up portion is provided, and a spring body is interposed between the support portion and the push-up portion.
- the spring body in addition to the configuration of the second aspect, includes a spring base portion inserted into guide holes opened at both ends of the spring support portion, and both ends between the spring base portions. And a spring body that is curved so as to form an arc shape that bulges toward the push-up portion, and at least one of the guide holes is formed in a slot shape.
- the end of the spring body in addition to the structure of the second aspect, is held movably on the movable member, and is curved in an arc shape bulging toward the spring support portion.
- the spring main body is provided, and the arcuate top portion of the spring main body is brought into contact with the upper surface of the spring support portion.
- a bracket is provided for holding the movable member movably on the base member.
- the drive device is disposed on the surface portion so as to face the base member having the motion base portion including one or a plurality of motion recesses, and the motion recesses on the opposite surface side.
- the movable member In a driving device that moves a movable member in a direction away from the base member in conjunction with contraction due to energization of the memory alloy member, the movable member is supported by the base member and biases the movable member in the away direction.
- the base member includes a spring support portion on a side portion of the operation base
- the movable member includes a flange-shaped push-up portion facing the upper surface of the spring support portion.
- the spring body has a spring base portion inserted into guide holes opened at both ends of the spring support portion, and an arc shape bulging toward the push-up portion side with both ends supported between the spring base portions. And at least one of the guide holes is formed in the shape of a slot, so that the spring body can be operated smoothly.
- the spring body includes a spring body that is held in an movable manner at an end portion thereof and is bulged toward the spring support portion, and is curved in an arc shape. By contacting the upper surface of the support portion, the spring body can be operated smoothly, and the movable member and the spring body can be integrated.
- the base member is provided with a bracket for movably holding the movable member, even if the movable member is urged away from the base member by the spring body, the movable member is dropped. Can be prevented.
- FIG. 1A and 1B are perspective views showing an example of a driving apparatus according to the present invention.
- FIG. 2 is an exploded perspective view of the above.
- FIG. 3A is a longitudinal sectional view of the operating portion of the above drive device, and
- FIG. 3B is a sectional view showing the spring body portion.
- 4A is a plan view showing the base member in FIG. 2
- FIG. 4B is a sectional view taken along the line aa
- FIG. 4C is a sectional view taken along the line bb.
- 5A is a front view showing the movable member in FIG. 2
- FIG. 5B is a plan view thereof
- FIG. 5C is a bottom view thereof.
- 6A and 6B are perspective views showing the bracket in FIG. FIGS.
- FIGS. 7A and 7B are longitudinal sectional views showing how the drive device is used during non-energization, wherein FIG. 7A is a view showing the state of the shape memory alloy member, and FIG. 7B is a view showing the state of the spring body.
- FIGS. 8A and 8B are longitudinal sectional views showing how the drive device is used during energization, wherein FIG. 8A is a view showing the state of the shape memory alloy member, and FIG. 8B is a view showing the state of the spring.
- FIG. 9 is a perspective view showing another aspect of the spring body of the drive device according to the present invention.
- FIG. 10 is a perspective view showing a state in which the spring body is attached to the movable member.
- FIG. 11A is a longitudinal sectional view of the operating portion of the above drive device
- FIG. 11B is a sectional view showing the spring body portion.
- a drive device used for a vibration generating actuator will be described as an example.
- reference numeral 1 denotes a drive device
- reference symbol A denotes a mounting board
- reference symbol B denotes a housing of an electronic device.
- the driving device 1 is disposed on the surface portion so as to face the base member 3 having a motion base portion 32 composed of one or a plurality of motion recesses 31, 31...
- a linear or belt-shaped shape memory alloy member 2 that contracts due to heat generated when current is applied between the base member 3 and the movable member 4.
- the movable member 4 is moved in a direction away from the base member 3 in conjunction with the contraction caused by energization of the shape memory alloy member 2.
- the drive device 1 includes spring bodies 7 and 7 supported by the base member 3, and the spring bodies 7 and 7 urge the movable member 4 in a direction away from the base member 3. .
- the drive device 1 includes terminal fittings 5 and 5 that are fitted to the end of the base member 3 and fix the end of the shape memory alloy member 2 to the base member 3.
- the shape memory alloy member 2 is energized through.
- the shape memory alloy member 2 includes an alloy exhibiting a shape memory effect, such as a nickel-titanium alloy, that is, a shape memory alloy wire 21 made of a shape memory alloy, and a strip-shaped covering member 22 that covers the outside of the shape memory alloy wire 21. Even if the shape memory alloy wire 21 is deformed at a predetermined temperature, the shape memory alloy wire 21 contracts due to heat generated when the shape memory alloy wire 21 is energized. As shown in FIG. 3, the base member 3 is integrally formed of an insulating resin such as an insulating resin containing ceramic particles (hereinafter referred to as a ceramic resin), and has a plurality of operating recesses 31, 31 on the surface portion.
- a ceramic resin insulating resin
- Terminal fixing portions 33, 33 disposed at both ends of the motion base 32, and rib-like spring support portions 34, 34 raised on both sides of the motion base 32.
- the operation base 32 is formed in a cross-sectional corrugated shape by continuously arranging a plurality of support convex portions 35, 35... Having a mountain-shaped cross section in the longitudinal direction. , 31... And the shape memory alloy member 2 is disposed between the terminal fixing portions 33 and 33 so as to cross the operation base portion 32 in the longitudinal direction. 33 is fixed.
- the spring support portions 34, 34 are formed in a rib shape having a certain width integrated with the side surface of the operation base 32, and close the side opening side of the operation recesses 31, 31,.
- the spring support portions 34, 34 are formed with guide holes 37, 37 that are open on the upper surfaces at both ends in the longitudinal direction.
- the spring base portions 71, 71 of the spring body 7 are inserted into the guide holes 37, 37, and the spring body 7. Is supported by the spring support.
- the spring body 7 is formed by bending a metal wire having elasticity, and has pin-shaped spring bases 71 and 71 inserted into the guide holes 37 and both ends supported between the spring bases 71 and 71. And a spring main body 72 having an arc shape bulging toward the movable member 4.
- the guide holes 37, 37 of the spring support portion 34 are formed in the shape of elongated holes that are long in the longitudinal direction of the spring body 7, so that the spring base 71 can move while being guided in conjunction with the elastic deformation of the spring body 72. ing.
- the terminal fixing portions 33, 33 are formed in a flat plate shape, and the end portion 21a of the shape memory alloy wire 21 is folded back from the front surface side of the terminal fixing portion 33 to the back surface side. By fitting, the end portion 21a of the shape memory alloy wire 21 is fixed.
- the terminal fittings 5 and 5 are formed in a rectangular tube cap shape whose one end is closed by drawing a conductive metal material, and by fitting the terminal fittings 5 and 5 to the terminal fixing portions 33 and 33, The end portions of the shape memory alloy member 2 are fixed to the terminal fixing portions 33 and 33 and connected to the terminal fittings 5 and 5. Further, on the back surfaces of the terminal fixing portions 33, 33, a caulking groove 36 is formed in a direction intersecting with the longitudinal direction of the base member 3, and the terminal fitting is matched to the position of the caulking groove 36.
- the movable member 4 is integrally formed of an insulating resin such as an insulating resin (ceramic resin) containing ceramic particles as in the case of the base member 3.
- the movable member 4 includes a plurality of mountain-shaped operation convex portions 41, 41... Inserted into the operation concave portions 31, 31.
- the movement convex portions 41, 41... Are fitted into the movement concave portions 31, 31.
- the movable member 4 is configured such that the side surfaces of the operation convex portions 41 and 41 are guided by the inner surface of the spring support portion 34, operate stably in the vertical direction, and suppress variation in acceleration.
- the movable member 4 includes a transmission part 42 having a flat contact surface at the upper end, and the transmission part 42 enters and exits up and down through an insertion window 61 opened on the upper surface of the bracket 6.
- a flange-like push-up portion 43 is integrally provided on the outer periphery of the movable member 4 so that the push-up portion 43 is stopped by the outer edge of the insertion window 61 of the bracket 6 and the lower surface of the push-up portion 43 is The spring bodies 7 and 7 are pressed upward.
- the bracket 6 is integrally formed by punching and bending a conductive metal plate material, and a pair of plate-like top plate portions 62 and a pair of portions bent downward from both side edges of the top plate portion 62. Side plate portions 63 and 63 are provided.
- the side plate portions 63 and 63 are formed in a reverse convex plate shape with step portions formed at both ends in the longitudinal direction, and the step portions 64 and 64 are supported on the upper surface of the base member 3. Further, the side plate portion 63 is integrally formed with locking claws 65, 65 formed by cutting and raising, and the locking claws 65, 65 are folded inward to form a latch formed on the side surface of the base member 3.
- the bracket 6 is fixed to the base member 3 so as not to be detachable by being engaged in the stopper recess 38.
- the movable member 4 is detached from the base member 3 by the spring bodies 7 and 7 supported by the base member 3, as shown in FIG.
- the spring bodies 7 and 7 are elastically deformed in the direction in which the spring main body 72 extends while guiding the spring bases 71 and 71 to the guide holes 37 and 37, respectively.
- the movable member 4 is superimposed on the base member 3, and each of the operating convex portions 41, 41... Is inserted into the operating concave portions 31, 31..., And the top of the operating convex portions 41, 41. ) And the shape memory alloy member 2 that has been deformed. Further, since the movable member 4 is always pressed against the housing B by the urging force (spring reaction force) of the spring bodies 7 and 7 supported by the base member 3, the driving device 1 includes the mounting board A and the electronic device.
- the driving device 1 is in a state where the driving force by the driving device is not transmitted to the driven object by a slight gap generated between the movable member 4 and the casing B as the driven object, that is, so-called air shot. Can be prevented.
- the drive device 1 is energized, that is, a voltage is generated between the terminal fittings 5 and 5, and a current is passed through the shape memory alloy member 2, the shape memory alloy member 2 contracts due to the shape memory effect, that is, energization heat generation.
- the movement convex portions 41, 41 of the shape memory alloy member 2 are displaced toward the movable member 4 in the position between the opposing surfaces of the portions contacting the top, and the movement convex portions 41, 41... Is pushed up by the shape memory alloy member 2 through 41..
- the movable member 4 since the movable member 4 is biased to the push-up side by the spring bodies 7, 7, the movable member 4 is subjected to an activation force (push-up force) by the shape memory alloy member 2 by the spring bodies 7, 7. Since the force is applied, the load on the shape memory alloy member 2 is small and the starting force is not hindered.
- the pushing force against the load received from the housing B is increased, and the initial movement speed of the movable member 4 is improved. Responsiveness is improved until 4 operates.
- the movable member 4 is resisted against the urging force of the spring bodies 7 and 7 by the load applied from the electronic device casing B or the like, as shown in FIG. , That is, the position where the movable member 4 is superimposed on the base member 3, and accordingly, the operating convex portions 41, 41... Are inserted into the operating concave portions 31, 31.
- the shape memory alloy member 2 returns to a corrugated shape (non-energized shape).
- the form of the spring body is not limited to the above-described shape, and for example, those shown in FIGS. 9 to 11 may be used.
- symbol is attached
- the spring body 8 is integrally formed by bending a metal wire having elasticity, and is connected to connect a pair of spring bodies 81, 81 curved in an arc shape and one end of both spring bodies.
- the holding groove 82 is provided with a holding portion 82 and movable holding portions 83 and 83 projecting inward from the other ends of the spring bodies, and the connection holding portion and the movable holding portion are respectively formed at both longitudinal ends of the movable member 4.
- the spring main bodies 81 and 81 are attached to the movable member 4 so as to form an arc shape that bulges toward the spring support portion 34. Then, as shown in FIG. 11, the spring body 8 is held by the spring support portion 34 by holding the movable member 4 on the base member 3 in a state where the arcuate top portion of the spring body is in contact with the upper surface of the spring support portion 34.
- the movable member 4 is urged in a direction to be detached from the base member 3.
- the mode of the bracket 6 is not limited to the above-described embodiment.
- the locking claw is protruded from the lower edge of the side plate portion 63 and the locking claw is folded inward to be engaged with the lower surface portion of the base member 3. You may make it match.
- the drive device 1 according to the present invention is not limited to the vibration generating actuator, and may be used for other purposes.
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Abstract
Description
この駆動装置は、上面部に1又は複数の動作凹部からなる動作基部を有する絶縁性のベース部材と、そのベース部材と互いに対向し、その対向面部に動作凹部に挿入される動作凸部を有する可動部材とを備えるとともに、その対向面部間に通電した際の発熱により収縮する形状記憶合金材がベース部材の動作凹部に合わせて湾曲した状態で配置されている。
また、この駆動装置では、可動部材をベース部材側へ付勢する付勢手段を備え、非通電時において、可動部材がベース部材側に押し付けられ、可動部材とベース部材とが重なり合い、それに伴い動作凸部が形状記憶合金材に当接した状態になるようにしている。
そして、その状態から形状記憶合金線に通電して一定の温度以上まで加熱すると超弾性によって形状記憶合金線が収縮し、形状記憶合金材に押されて可動子がベース部材に対し離反する方向に相対移動する。
一方、形状記憶合金線の通電状態を解除し、形状記憶合金線の温度が一定の温度以下に低下すると、可動部材が付勢手段により可動部材がベース部材側に押されて原位置に復帰し、それに伴い各形状記憶合金線が湾曲した形状(非通電時形状)に復帰するようになっている。
また、この種の従来の駆動装置では、付勢手段によって可動部材がベース部材側に付勢されていることから、駆動装置が完全に停止した状態から起動する際の初動速度が抑制され、停止状態から動作開始までの応答性を阻害するという問題があった。
一方、この種の駆動装置の実装においては、駆動装置が実装される実装基板と、駆動装置により駆動させる被駆動物との間の距離が公差により非通電時の駆動装置の全高より広くなる場合があり、その場合、可動部材の押圧面と被駆動物との間に若干の隙間ができる虞がある。
このように若干の隙間が生じると、駆動装置を作動させた際、その隙間分だけ駆動装置による駆動力が被駆動物に伝達されない状態、所謂空撃ちを生じ、異音等の原因となる虞があった。
そこで、本発明は、このような従来の問題に鑑み、形状記憶合金部材への負担が少なく、初動性能に優れ、且つ、可動部材と被駆動物とを隙間なく実装可能な形状記憶合金部材を使用した駆動装置の提供を目的としてなされたものである。
請求項2に記載の発明の特徴は、請求項1の構成に加え、前記ベース部材は、前記動作基部の側部にバネ支持部を備え、前記可動部材は、前記バネ支持部の上面と対向するフランジ状の押し上げ部を備え、前記支持部と前記押し上げ部との間にバネ体を介在させたことにある。
請求項3に記載の発明の特徴は、請求項2の構成に加え、前記バネ体は、前記バネ支持部の両端に開口したガイド穴に挿入されるバネ基部と、該両バネ基部間に両端を支持させて押し上げ部側に膨出した円弧状を成すように湾曲したバネ本体とを備え、該ガイド穴の少なくとも何れか一方が長穴溝状に形成されたことにある。
請求項4に記載の発明の特徴は、請求項2の構成に加え、前記バネ体は、端部が前記可動部材に移動可能に保持され、前記バネ支持部側に膨出した円弧状に湾曲したバネ本体を備え、該バネ本体の円弧状頂部を前記バネ支持部の上面に当接させたことにある。
請求項5に記載の発明の特徴は、請求項1~4の何れか1項の構成に加え、前記ベース部材に前記可動部材を移動可能に保持させるブラケットを備えたことにある。
また、本発明において、前記ベース部材は、前記動作基部の側部にバネ支持部を備え、前記可動部材は、前記バネ支持部の上面と対向するフランジ状の押し上げ部を備え、前記支持部と前記押し上げ部との間に前記バネ体を介在させたことにより、形状記憶合金材による押し上げ動作を阻害することなくバネ体で可動部材を付勢することができる。
更に、本発明において、前記バネ体は、前記バネ支持部の両端に開口したガイド穴に挿入されるバネ基部と、該両バネ基部間に両端を支持させて押し上げ部側に膨出した円弧状を成すように湾曲したバネ本体とを備え、該ガイド穴の少なくとも何れか一方が長穴溝状に形成されたことにより、バネ体を円滑に動作させることができる。
更にまた、前記バネ体は、端部が前記可動部材に移動可能に保持され、前記バネ支持部側に膨出した円弧状に湾曲したバネ本体を備え、該バネ本体の円弧状頂部を前記バネ支持部の上面に当接させたことにより、バネ体を円滑に動作させることができるとともに、可動部材とバネ体とを一体化することができる。
また、本発明において、前記ベース部材に前記可動部材を移動可能に保持させるブラケットを備えたことにより、バネ体によりベース部材に対し離反する方向に可動部材を付勢していても可動部材の脱落を防止することができる。
図2は、同上の分解斜視図である。
図3は、(a)は同上の駆動装置の動作部分の縦断面図、(b)は同バネ体部分を示す断面図である。
図4は、(a)は図2中のベース部材を示す平面図、(b)はa−a線断面図、(c)は同b−b線断面図である。
図5は、(a)は図2中の可動部材を示す正面図、(b)は同平面図、(c)は同底面図である。
図6は、(a)、(b)は図2中のブラケットを示す斜視図である。
図7は、非通電時の駆動装置の使用態様を示す縦断面図であって、(a)は形状記憶合金部材の状態を示す図、(b)はバネ体の状態を示す図である。
図8は、通電時の駆動装置の使用態様を示す縦断面図であって、(a)は形状記憶合金部材の状態を示す図、(b)はバネの状態を示す図である。
図9は、本発明に係る駆動装置のバネ体の他の態様を示す斜視図である。
図10は、同上のバネ体を可動部材に取り付けた状態を示す斜視図である。
図11は、(a)は同上の駆動装置の動作部分の縦断面図、(b)は同バネ体部分を示す断面図である。
この駆動装置1は、表面部に一又は複数の動作凹部31,31…からなる動作基部32を有するベース部材3と、ベース部材3と対向するように配置され、対向面側に動作凹部31内に挿入される動作凸部41,41…を有する可動部材4とを備え、ベース部材3と可動部材4との間に通電した際の発熱により収縮する線状又は帯状の形状記憶合金部材2を介在させ、形状記憶合金部材2の通電による収縮に連動して可動部材4をベース部材3に対し離反する方向に移動させるようになっている。
また、この駆動装置1は、ベース部材3に支持されたバネ体7,7を備え、このバネ体7,7により可動部材4をベース部材3から離反する方向に付勢するようになっている。
また、この駆動装置1は、ベース部材3の端部と互いに嵌合し、形状記憶合金部材2の端部をベース部材3に固定する端子金具5,5を備え、この端子金具5,5を介して形状記憶合金部材2に通電されるようになっている。
形状記憶合金部材2は、ニッケル−チタン合金等の形状記憶効果を示す合金、即ち形状記憶合金からなる形状記憶合金線21と、形状記憶合金線21の外側を覆う帯状の被覆部材22とを備え、所定温度下で変形させても形状記憶合金線21に通電させた際の発熱により当該形状記憶合金線21が収縮するようになっている。
ベース部材3は、図3に示すように、セラミック粉粒体を含有する絶縁性樹脂(以下、セラミック樹脂という)等の絶縁性樹脂により一体に形成され、表面部に複数の動作凹部31,31…を有する動作基部32と、動作基部32の両端に配置された端子固定部33,33と、動作基部32の両側部に立ち上げたリブ状のバネ支持部34,34とを備えている。
動作基部32は、断面山型状の複数の支持用凸部35,35…が長手方向に連続して配置されて断面波型状に形成され、当該波型状の谷間部が各動作凹部31,31…を構成し、形状記憶合金部材2が動作基部32を長手方向で横切るように両端子固定部33,33間に配置され、その両端がそれぞれ端子金具5,5により端子固定部33,33に固定されている。
バネ支持部34,34は、動作基部32の側面と一体になった一定幅を有するリブ状に形成され、動作凹部31,31…の側面開口側を閉鎖している。
このバネ支持部34,34には、その長手方向両端上面に開口したガイド穴37,37が形成され、このガイド穴37,37にバネ体7のバネ基部71,71が挿入され、バネ体7がバネ支持部に支持されるようになっている。
バネ体7は、弾性を有する金属線材を線材曲げ加工することにより形成され、ガイド穴37に挿入されるピン状のバネ基部71,71と、両バネ基部71,71間に両端を支持させて可動部材4側に膨出した円弧状をなすバネ本体72とを備えている。
バネ支持部34のガイド穴37,37は、バネ体7の長手方向に長い長穴溝状に形成され、バネ本体72の弾性変形に連動してバネ基部71が案内されつつ移動できるようになっている。
端子固定部33,33は、平板状に形成され、形状記憶合金線21の端部21aが端子固定部33の表面側から端面を経て裏面側に折り返され、その外側に端子金具5,5を嵌め込むことにより形状記憶合金線21の端部21aが固定されるようになっている。
端子金具5,5は、導電性金属材を絞り加工することにより一端が閉鎖された角筒キャップ状に形成され、この端子金具5,5を端子固定部33,33に嵌合させることにより、形状記憶合金部材2の端部が端子固定部33,33に固定されるとともに端子金具5,5に接続されるようになっている。
また、端子固定部33,33の裏面には、ベース部材3の長手方向と交差する方向に向けた加締め用溝36が形成されており、この加締め用溝36の位置に合わせて端子金具5,5の裏面側を加締めることにより形状記憶合金部材2の端部を確実に端子固定部33,33に固定するとともに、端子金具5,5と形状記憶合金部材2との安定した接続状態が確保されている。
一方、可動部材4は、図4に示すように、ベース部材3と同様に、セラミック粉粒体を含有する絶縁性樹脂(セラミック樹脂)等の絶縁性樹脂により一体に形成されている。
この可動部材4は、対向面側にベース部材3の各動作凹部31,31…内に挿入される複数の山形状の動作凸部41,41…を備え、ベース部材3に重ね合わされることにより、各動作凸部41,41…が動作凹部31,31…内に嵌め込まれ、可動部材4とベース部材3との対向面部間に配置された形状記憶合金部材2を動作凸部41,41…の嵌合面形状に合わせて波型に変形させるようになっている。
また、可動部材4は、動作凸部41,41の側面がバネ支持部34の内側面にガイドされ、上下方向で安定して動作し、加速度のバラつきが抑制されるようになっている。
可動部材4は、上端に平坦な接触面を有する伝達部42を備え、この伝達部42がブラケット6上面に開口した挿通窓61を通して上下に出入りするようになっている。
また、可動部材4の外周には、フランジ状の押し上げ部43が一体に備えられ、この押し上げ部43がブラケット6の挿通窓61外縁によって当て止めされるようにし、且つ、押し上げ部43の下面がバネ体7、7により上方に押圧されている。
ブラケット6は、図6に示すように、導電性金属板材を打ち抜き折り曲げ加工することにより一体に形成され、平板状の天板部62と、天板部62の両側縁より下向きに折り曲げた一対の側板部63,63とを備えている。
側板部63,63は、長手方向両端に段部が形成された逆凸板状に形成され、該段部64,64がベース部材3の上面に支持されるようになっている。
また、側板部63には、切り起こし加工により形成された係止爪65,65が一体に形成され、この係止爪65,65を内向きに折り込み、ベース部材3の側面に形成された係止凹部38内に係合させることによりブラケット6がベース部材3に着脱不能に固定される。
このように構成された駆動装置1は、電子機器に未装着の状態において、図3に示すように、ベース部材3に支持されたバネ体7,7により可動部材4がベース部材3に対し離脱する方向に付勢された状態にあり、可動部材4の動作凸部41,41がベース部材3の動作凹部31,31…及び波形状に湾曲した状態の形状記憶合金部材2より浮き上がった状態にある。
この駆動装置1を実装するには、図7(a)に示すように、可動部材4の上面を筐体Bに押し当て、バネ体7,7の付勢力に抗して可動部材4をベース部材3側に押し下げた状態で駆動装置1を実装基板Aと電子機器筐体Bとの間に設置する。
その際には、バネ体7,7は、図7(b)に示すように、バネ基部71,71をガイド穴37,37に案内させつつ、バネ本体72が伸長する方向に弾性変形し、可動部材4は、ベース部材3に重ね合わされ、各動作凸部41,41…が動作凹部31,31…内に挿入され、動作凸部41,41…の頂部が波型状(非通電時形状)に変形した各形状記憶合金部材2と近接する。
また、可動部材4がベース部材3に支持されたバネ体7,7の付勢力(バネ反力)によって常に筐体Bに押し付けられた状態にあるので、駆動装置1は、実装基板Aと電子機器筐体Bとの公差や駆動装置1自体の公差の影響をバネ体7,7で吸収し、可動部材4と被駆動物である筐体Bとの間で隙間を生じないように取り付けることができる。
よって、駆動装置1は、可動部材4と被駆動物である筐体Bとの間に生じる若干の隙間によってその隙間分だけ駆動装置による駆動力が被駆動物に伝達されない状態、所謂空撃ちを防止することができる。
一方、この駆動装置1に通電、即ち、端子金具5,5間に電圧を生じさせ、形状記憶合金部材2に電流を流すと、形状記憶合金部材2が形状記憶効果、即ち通電発熱によって収縮し、図8に示すように、形状記憶合金部材2の動作凸部41,41…頂部に接触した部分の対向面間方向位置が可動部材4側に変位し、それに連動して動作凸部41,41…を介して形状記憶合金部材2に押し上げられて可動部材4がベース部材3より離反する方向に相対移動し、電子機器筐体Bを持ち上げる。
その際、可動部材4がバネ体7,7により押し上げ側に付勢されていることにより、可動部材4には、形状記憶合金部材2による起動力(押し上げ力)にバネ体7,7による付勢力が加わるので、形状記憶合金部材2への負担が少なく、起動力が妨げられない。
また、形状記憶合金部材2による押し上げ力にバネ体7,7による付勢力が加わることにより、筐体Bより受ける負荷に対抗する押し上げ力が増し、可動部材4の初動速度が向上し、可動部材4が動作するまで応答性が向上する。
そして、端子金具5,5間に負荷した電圧が除去されると、電子機器筐体Bより加わる負荷等によって、バネ体7,7の付勢力に抗して可動部材4が図5(a)に示す原位置、即ち、ベース部材3に可動部材4が重ね合わされる位置に復帰し、それに伴い各動作凸部41,41…が動作凹部31,31…内に挿入され、動作凸部41,41…に押圧されて形状記憶合金部材2が波型状(非通電時形状)に復帰する。
尚、バネ体の態様は、上述の形状に限定されず、例えば、図9~図11に示すものを使用してもよい。尚、上述の実施例と同様の構成には同一符号を付して説明を省略する。
このバネ体8は、弾性を有する金属製線材を線材曲げ加工することにより一体に形成され、円弧状に湾曲した一対のバネ本体81,81と両バネ本体の一方の端部間を連結する連結保持部82と、両バネ本体の他端より内向きに突出した可動保持部83,83とを備え、連結保持部及び可動保持部をそれぞれ可動部材4の長手方向両端に形成された保持溝44に移動可能に保持させることにより、バネ本体81,81がバネ支持部34側に膨出した円弧状を成すように可動部材4に取り付けられるようになっている。
そして、図11に示すように、バネ本体の円弧状頂部をバネ支持部34の上面に当接させた状態で可動部材4をベース部材3に保持させることにより、バネ体8がバネ支持部34に支持されて可動部材4をベース部材3より離脱する方向に付勢するようになっている。
また、ブラケット6の態様は、上述の実施例に限定されず、例えば、係止爪を側板部63の下縁より突出させ、当該係止爪を内向きに折り返しベース部材3の下面部に係合させるようにしてもよい。
また、本発明に係る駆動装置1は、振動発生用アクチュエータに限定されず、他の用途に使用するものであってもよい。
B 筐体
1 駆動装置
2 形状記憶合金部材
21 形状記憶合金線
22 被覆部材
3 ベース部材
31 動作凹部
32 動作基部
33 端子固定部
34 バネ支持部
35 支持用凸部
36 加締め用溝
37 ガイド穴
4 可動部材
41 動作凸部
42 伝達部
43 フランジ部
5 端子金具
6 ブラケット
61 挿通窓
7 バネ体
71 バネ基部
72 バネ本体
8 バネ
81 バネ本体
82 連結保持部
83 可動保持部
Claims (5)
- 表面部に一又は複数の動作凹部からなる動作基部を有するベース部材と、
該ベース部材と対向するように配置され、対向面側に前記動作凹部内に挿入される動作凸部を有する可動部材とを備え、
前記ベース部材と前記可動部材との間に通電した際の発熱により収縮する線状又は帯状の形状記憶合金部材を介在させ、前記形状記憶合金部材の通電による収縮に連動して可動部材を前記ベース部材に対し離反する方向に移動させるようにした駆動装置において、
前記ベース部材に支持されて前記可動部材を前記離反する方向に付勢するバネ体を備えたことを特徴とする駆動装置。 - 前記ベース部材は、前記動作基部の側部にバネ支持部を備え、
前記可動部材は、前記バネ支持部の上面と対向するフランジ状の押し上げ部を備え、前記支持部と前記押し上げ部との間にバネ体を介在させた請求項1に記載の駆動装置。 - 前記バネ体は、前記バネ支持部の両端に開口したガイド穴に挿入されるバネ基部と、該両バネ基部間に両端を支持させて押し上げ部側に膨出した円弧状を成すように湾曲したバネ本体とを備え、
該ガイド穴の少なくとも何れか一方が長穴溝状に形成された請求項2に記載の駆動装置。 - 前記バネ体は、端部が前記可動部材に移動可能に保持され、前記バネ支持部側に膨出した円弧状に湾曲したバネ本体を備え、該バネ本体の円弧状頂部を前記バネ支持部の上面に当接させた請求項2に記載の駆動装置。
- 前記ベース部材に前記可動部材を移動可能に保持させるブラケットを備えた請求項1~4の何れか1項に記載の駆動装置。
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KR1020157005171A KR101695326B1 (ko) | 2014-06-20 | 2014-10-08 | 구동장치 |
CN201480002737.5A CN105531475B (zh) | 2014-06-20 | 2014-10-08 | 驱动装置 |
US14/744,039 US9909572B2 (en) | 2014-06-20 | 2015-06-19 | Drive device |
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US9785196B1 (en) * | 2016-08-18 | 2017-10-10 | Microsoft Technology Licensing, Llc | Capture connector for actuated locking devices |
JP7063581B2 (ja) * | 2017-11-14 | 2022-05-09 | フォスター電機株式会社 | アクチュエータ |
JP6660364B2 (ja) * | 2017-11-17 | 2020-03-11 | 株式会社丸和製作所 | アクチュエータおよびアクチュエータの製造方法 |
CN110273821B (zh) * | 2018-03-15 | 2021-03-30 | 华为技术有限公司 | 发电装置、发电系统、基于发电装置的终端和充电系统 |
JP7193952B2 (ja) * | 2018-08-23 | 2022-12-21 | フォスター電機株式会社 | アクチュエータ |
US11146187B2 (en) * | 2019-02-06 | 2021-10-12 | Seiko Instruments Inc. | Inertial force imparting device and tactile sensation presenting device |
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JP2014037806A (ja) * | 2012-08-17 | 2014-02-27 | Smk Corp | 駆動装置及びその製造方法 |
JP2014055527A (ja) * | 2012-09-11 | 2014-03-27 | Smk Corp | 平型形状記憶ケーブル体及びそれを使用した駆動装置 |
JP2014088818A (ja) * | 2012-10-30 | 2014-05-15 | Minebea Co Ltd | アクチュエータ |
JP2014088811A (ja) * | 2012-10-30 | 2014-05-15 | Minebea Co Ltd | アクチュエータ |
Also Published As
Publication number | Publication date |
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EP3159538A1 (en) | 2017-04-26 |
CN105531475A9 (zh) | 2016-07-20 |
CN105531475A (zh) | 2016-04-27 |
JP5999381B2 (ja) | 2016-09-28 |
JP2016006309A (ja) | 2016-01-14 |
TWI602993B (zh) | 2017-10-21 |
TW201600718A (zh) | 2016-01-01 |
EP3159538A4 (en) | 2017-11-15 |
KR101695326B1 (ko) | 2017-01-11 |
CN105531475B (zh) | 2018-05-15 |
KR20160036526A (ko) | 2016-04-04 |
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