JP2588003B2 - Vise table shape memory alloy device - Google Patents
Vise table shape memory alloy deviceInfo
- Publication number
- JP2588003B2 JP2588003B2 JP23228288A JP23228288A JP2588003B2 JP 2588003 B2 JP2588003 B2 JP 2588003B2 JP 23228288 A JP23228288 A JP 23228288A JP 23228288 A JP23228288 A JP 23228288A JP 2588003 B2 JP2588003 B2 JP 2588003B2
- Authority
- JP
- Japan
- Prior art keywords
- movable member
- contact
- shape memory
- memory alloy
- 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.)
- Expired - Lifetime
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- Thermally Actuated Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、一対の形状記憶合金を駆動源として備え、
二つの安定状態を有するバイステーブル形状記憶合金装
置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention comprises a pair of shape memory alloys as a driving source,
The present invention relates to a bistable shape memory alloy device having two stable states.
この種の装置においては、一方の形状記憶合金の形状
回復力により装置を一方の安定状態から他方の安定状態
へ遷移させ、逆に他方の形状記憶合金の形状回復力によ
り装置を前記他方の安定状態から前記一方の安定状態へ
遷移させる。In this type of device, the shape-restoring force of one shape-memory alloy causes the device to transition from one stable state to the other, and conversely, the shape-restoring force of the other shape-memory alloy causes the device to move to the other stable state. From the state to the one stable state.
しかしながら、従来のこの種の装置においては、一方
の形状記憶合金が十分冷却しないうちに他方の形状記憶
合金を加熱すると、両方の形状記憶合金が互いに同時に
形状回復力を作用させ合って永久変形してしまい、装置
が正常に動作しなくなるという欠点があった。However, in a conventional apparatus of this type, if one of the shape memory alloys is heated while the other is not sufficiently cooled, the two shape memory alloys simultaneously exert a shape-recovering force on each other and undergo permanent deformation. As a result, there is a disadvantage that the device does not operate normally.
本発明は、このような事情に鑑みてなされたもので、
一方の形状記憶合金が十分冷却しないうちに他方の形状
記憶合金を加熱しても、両方の形状記憶合金が互いに同
時に形状回復力を作用させ合って永久変形してしまうこ
とのないバイステーブル形状記憶合金装置を提供するこ
とを目的とする。The present invention has been made in view of such circumstances,
Even if one shape memory alloy is not sufficiently cooled, even if the other shape memory alloy is heated, the two shape memory alloys simultaneously apply a shape recovery force to each other and do not permanently deform due to mutual action. An object of the present invention is to provide an alloy device.
本発明によるバイステーブル形状記憶合金装置は、第
一の位置と第二の位置との間を可動な可動部材と、この
可動部材に連係されており、形状回復時に前記可動部材
を前記第一の位置に向って動かそうとするように形状回
復力を作用する第一の形状記憶合金と、前記可動部材に
連係されており、形状回復時に前記可動部材を前記第二
の位置に向って動かそうとするように形状回復力を作用
する第二の形状記憶合金と、前記可動部材が所定位置よ
り前記第一の位置側にあるときは前記可動部材を前記第
一の位置に向って付勢する一方、前記可動部材が前記所
定位置より前記第二の位置側にあるときは前記可動部材
を前記第二の位置に向って付勢する可動部材付勢バネ
と、常時は互いに接触されているが、前記第一および第
二の形状記憶合金が同時に所定以上の大きさの形状回復
力を発生している状態になると互いに離間される同時形
状回復防止用接点と、この同時形状回復防止用接点を介
して前記第一および第二の形状記憶合金にそれぞれ電流
を流す第一の電流路および第二の電流路とを有してなる
ものである。A vice table shape memory alloy device according to the present invention is a movable member movable between a first position and a second position, and is linked to the movable member, and the movable member is moved to the first position during shape recovery. A first shape memory alloy that acts on a shape recovery force to move toward the position, and is linked to the movable member, and moves the movable member toward the second position during shape recovery. A second shape memory alloy that exerts a shape restoring force, and urges the movable member toward the first position when the movable member is closer to the first position than a predetermined position. On the other hand, when the movable member is located on the second position side from the predetermined position, the movable member biasing spring that biases the movable member toward the second position is always in contact with each other. Wherein the first and second shape memory alloys are the same. A contact for preventing simultaneous shape recovery that is separated from each other when a state of generating a shape recovery force of a predetermined magnitude or more is generated, and the first and second shape memory alloys via the contact for preventing simultaneous shape recovery. Having a first current path and a second current path through which current flows.
本発明においては、一方の形状記憶合金が十分冷却し
ないうちに他方の形状記憶合金を加熱した場合には、同
時形状回復防止用接点が離間され、形状記憶合金に対す
る通電が停止されるので、両方の形状記憶合金の形状回
復力の作用させ合いを防止することができる。In the present invention, when one shape memory alloy is heated before the other shape memory alloy is sufficiently cooled, the contact for preventing simultaneous shape recovery is separated, and the current supply to the shape memory alloy is stopped. Of the shape memory alloy of the present invention can be prevented from acting on each other.
以下、本発明を図面に示す実施例に基づいて説明す
る。Hereinafter, the present invention will be described based on embodiments shown in the drawings.
第１〜７図は本発明の一実施例を示す。この実施例に
おいて、絶縁体からなる大略Ｔ字状の可動部材１の上辺
部1aの中央部には該可動部材１の下辺部1bと平行方向に
延びる長穴２が設けられている（第４図は可動部材１を
単体で示す）。そして、前記長穴２は導体からなる軸状
接点３に貫通されており、これにより、可動部材は軸状
接点３を中心として回動可能かつ軸状接点３に対して長
穴２の方向に移動可能となっている。1 to 7 show an embodiment of the present invention. In this embodiment, an elongated hole 2 extending in a direction parallel to the lower side 1b of the movable member 1 is provided at the center of the upper side 1a of the substantially T-shaped movable member 1 made of an insulator (fourth). The figure shows the movable member 1 alone). The elongated hole 2 is penetrated by an axial contact 3 made of a conductor, so that the movable member can rotate around the axial contact 3 in the direction of the elongated hole 2 with respect to the axial contact 3. It is movable.
前記可動部材１の上辺部1aの表面には板状の可動部材
側接点４（第５図はこの可動部材側接点４を単体で示
す）が固定されており、この可動部材側接点４には、可
動部材１の長穴２を露出するように、凹部５が設けられ
ている。そして、凹部５の下端と長穴２の下端とが同一
高さとされるか、または凹部５の下端の方が長穴２の下
端より僅かに高くされている。ここにおいて、前記軸状
接点３および可動部材側接点４は、本実施例において本
発明の同時形状回復防止用接点を構成するものである。On the surface of the upper side 1a of the movable member 1, a plate-shaped movable member-side contact 4 (FIG. 5 shows the movable member-side contact 4 as a single unit) is fixed. The recess 5 is provided so as to expose the elongated hole 2 of the movable member 1. The lower end of the concave portion 5 and the lower end of the elongated hole 2 are the same height, or the lower end of the concave portion 5 is slightly higher than the lower end of the elongated hole 2. Here, the shaft-shaped contact 3 and the movable member side contact 4 constitute a contact for preventing simultaneous shape recovery of the present invention in the present embodiment.
前記可動部材１の下辺部1bの下方には、軸状接点３に
対して位置関係を固定された絶縁体６が設けられてい
る。この絶縁体６には、それぞれ良導体からなる共通板
バネ７、第一の板バネ８、および第二の板バネ９の下端
部が支持されており、図上第一の板バネ８は共通板バネ
７の左方、第二の板バネ９は共通板バネ７の右方にそれ
ぞれ配されている。前記共通板バネ７の上端部よりやや
下方の部分には通電切替用共通接点10が設けられてい
る。前記第一の板バネ８の上端部には第一の通電切替用
接点11、第二の板バネ９の上端部には第二の通電切替用
接点12が設けられている。ここで、本実施例において、
前記第一の接点11と共通接点10は本発明の第一の通電切
替用接点対を構成し、前記第二の接点12と共通接点10は
本発明の第二の通電切替用接点対を構成する。Below the lower side 1b of the movable member 1, an insulator 6 having a fixed positional relationship with respect to the axial contact 3 is provided. The insulator 6 supports the lower ends of a common leaf spring 7, a first leaf spring 8, and a second leaf spring 9, each of which is made of a good conductor. The second leaf spring 9 is disposed on the left side of the spring 7 and on the right side of the common leaf spring 7. An energization switching common contact 10 is provided at a portion slightly below the upper end of the common leaf spring 7. A first energization switching contact 11 is provided at an upper end of the first leaf spring 8, and a second energization switching contact 12 is provided at an upper end of the second leaf spring 9. Here, in this embodiment,
The first contact 11 and the common contact 10 constitute a first energizing switching contact pair of the present invention, and the second contact 12 and the common contact 10 constitute a second energizing switching contact pair of the present invention. I do.
前記共通板バネ７の上端部と可動部材１の下辺部1bの
下端部との間には弓バネ13が介装されており、この弓バ
ネ13は、可動部材１が第１図のように右に傾いていると
きは可動部材１を時計方向に付勢するとともに共通板バ
ネ７を第二の板バネ９側に付勢して共通接点10を第二の
接点12に接触させる一方、可動部材１が第２図のように
左に傾いているときは可動部材１を反時計方向に付勢す
るとともに共通板バネ７を第一の板バネ８側に付勢して
共通接点10を第一の接点11に接触させるようになってい
る。An bow spring 13 is interposed between the upper end of the common leaf spring 7 and the lower end of the lower side 1b of the movable member 1, and the movable spring 1 is provided as shown in FIG. When the movable member 1 is tilted to the right, the movable member 1 is urged clockwise and the common leaf spring 7 is urged toward the second leaf spring 9 to bring the common contact 10 into contact with the second contact 12 while the movable member 1 is movable. When the member 1 is inclined to the left as shown in FIG. 2, the movable member 1 is urged in the counterclockwise direction, and the common leaf spring 7 is urged toward the first leaf spring 8 so that the common contact 10 is moved to the first position. One contact 11 is brought into contact therewith.
前記可動部材１の図上左端部にはTi−Ni合金等からな
る線材状の第一の形状記憶合金14の上端部が取り付けら
れており、この第一の形状記憶合金14の下端部は絶縁体
６に取り付けられている。前記可動部材１の図上右端部
にはTi−Ni合金等からなる線材状の第二の形状記憶合金
16の上端部が取り付けられており、この第二の形状記憶
合金16の下端部は絶縁体６に取り付けられている。ここ
で、前記第一の形状記憶合金14および第二の形状記憶合
金16は、これらの形状記憶合金がそれぞれ記憶している
長さに復帰すると、可動部材１がそれらの形状記憶合金
側に傾くこととなる長さを記憶している。また、前記第
一の形状記憶合金14および第二の形状記憶合金16の上端
部は可動部材側接点４に電気的に接続されている。An upper end of a wire-shaped first shape memory alloy 14 made of a Ti-Ni alloy or the like is attached to the left end of the movable member 1 in the drawing, and a lower end of the first shape memory alloy 14 is insulated. Attached to body 6. A wire-shaped second shape memory alloy made of a Ti-Ni alloy or the like is provided on the right end of the movable member 1 in the drawing.
An upper end of the second shape memory alloy 16 is attached to the insulator 6. Here, when the first shape memory alloy 14 and the second shape memory alloy 16 return to the lengths stored in the respective shape memory alloys, the movable member 1 tilts toward the shape memory alloys. The different length is stored. The upper ends of the first shape memory alloy 14 and the second shape memory alloy 16 are electrically connected to the movable member side contact 4.
第６図および第７図は本装置の電気的接続関係を主と
して表し、機械的構成は簡略化して表した図である。こ
れらの図に示されるように、第一および第二の形状記憶
合金14,16の下端部間にはダイオードD1およびダイオー
ドD2が直列かつ同方向に挿入されており、これらのダイ
オードD1およびD2の接続点は一方の電源入力端子17に接
続されている。他方の電源入力端子18はダイオードD3を
介して第一の接点11に接続されるとともにダイオードD3
と逆向きのダイオードD4を介して第二の接点12に接続さ
れている。また、軸状接点３は共通板バネ７に電気的に
接続されている。FIG. 6 and FIG. 7 mainly show the electrical connection relationship of the present apparatus, and the mechanical configuration is simplified. As shown in these figures, between the lower end portion of the first and second shape memory alloys 14 and 16 and diodes D 1 and diode D 2 is connected in series and in the same direction, these diodes D 1 and D 2 of the connection point is connected to one power supply terminal 17. Diode D 3 together with the other power supply terminal 18 is connected to the first contact 11 through the diode D 3
Second it is connected to the contacts 12 via the reverse diode D 4 and. Further, the shaft-shaped contact 3 is electrically connected to the common leaf spring 7.
次に、本実施例の作動を説明する。 Next, the operation of the present embodiment will be described.
第１図および６図は本実施例において可動部材１が第
二の位置にある状態を示しており、この状態において
は、可動部材１は右側（第二の形状記憶合金16側）に所
定角度傾いており、共通接点10は第二の接点12に接触し
ている。この状態において入力端子17,18に入力端子17
側が（＋）、入力端子18側が（−）となるような極性の
電圧を印加すると、入力端子17−ダイオードD1−第一の
形状記憶合金14−可動部材側接点４−軸状接点３−共通
板バネ７および共通接点10−第二の接点12および第二の
板バネ９−ダイオードD4−入力端子18の経路で電流が流
れる。これにより、第一の形状記憶合金14がジュール熱
により所定の温度範囲にまで加熱され、形状記憶効果に
より、記憶している長さに復帰しようとして収縮するの
で、可動部材１が反時計方向に回動して行く。FIGS. 1 and 6 show a state in which the movable member 1 is in the second position in this embodiment. In this state, the movable member 1 is moved to the right side (the second shape memory alloy 16 side) by a predetermined angle. The common contact 10 is in contact with the second contact 12. In this state, input terminals 17 and 18 are
When a voltage having a polarity such that the input terminal 18 becomes (+) and the input terminal 18 becomes (−) is applied, the input terminal 17 -diode D 1 -first shape memory alloy 14 -movable member side contact 4 -shaft contact 3- A current flows through the path of the common leaf spring 7 and the common contact 10 -the second contact 12 and the second leaf spring 9 -the diode D 4 -the input terminal 18. Thereby, the first shape memory alloy 14 is heated to a predetermined temperature range by Joule heat, and shrinks to return to the memorized length by the shape memory effect, so that the movable member 1 moves in the counterclockwise direction. It turns.
このとき、弓バネ13は、最初はこの可動部材１の回動
に抗するが、可動部材１が中立位置を越えて図上左側に
傾くと、第一の形状記憶合金14の形状回復力と順方向、
すなわち可動部材１をより左側（反時計方向）に回動さ
せるように付勢するようになるとともに、共通接点10を
第一の接点11側に付勢するようになる。したがって、今
度は第２図および７図のように可動部材１が左側（第一
の形状記憶合金14側）に所定角度傾いた状態となる。こ
の位置が本実施例における可動部材１の第一の位置であ
り、この状態では、共通接点10が第二の接点12から離間
し、第一の接点11に接触した状態となり、第一の形状記
憶合金14に対する通電は停止される。At this time, the bow spring 13 initially resists the rotation of the movable member 1, but when the movable member 1 is tilted to the left side in the figure beyond the neutral position, the shape recovery force of the first shape memory alloy 14 is reduced. Forward direction,
That is, the movable member 1 is urged to rotate more leftward (counterclockwise), and the common contact 10 is urged toward the first contact 11 side. Accordingly, this time, the movable member 1 is inclined leftward (to the first shape memory alloy 14) by a predetermined angle as shown in FIGS. This position is the first position of the movable member 1 in the present embodiment. In this state, the common contact 10 is separated from the second contact 12 and comes into contact with the first contact 11, and the first shape The energization of the memory alloy 14 is stopped.
次に、第２図および７図のように可動部材１が第一の
位置にある状態において、入力端子17,18に前とは逆極
性の電圧、すなわち入力端子17側が（−）、入力端子18
側が（＋）となるような極性の電圧を印加すると、入力
端子18−ダイオードD3−第一の板バネ８および第一の接
点11−共通接点10および共通板バネ７−軸状接点３−可
動部材側接点４−第二の形状記憶合金16−ダイオードD2
−入力端子17の経路で電流が流れる。これにより、第二
の形状記憶合金16がジュール熱により所定の温度範囲に
まで加熱され、形状記憶効果により、記憶している長さ
に復帰しようとして収縮するので、可動部材１が時計方
向に回動して行く。Next, in a state where the movable member 1 is in the first position as shown in FIGS. 2 and 7, a voltage having a polarity opposite to that of the previous state is applied to the input terminals 17 and 18, that is, the input terminal 17 side is (−), 18
Upon application of a side is (+) and a like polarity of the voltage, the input terminal 18 a diode D 3 - the first leaf spring 8 and the first contact 11 Common contact 10 and a common leaf spring 7 axial contact 3- Movable member side contact 4-second shape memory alloy 16-diode D 2
A current flows through the path of the input terminal 17; As a result, the second shape memory alloy 16 is heated to a predetermined temperature range by Joule heat, and shrinks to return to the stored length by the shape memory effect, so that the movable member 1 rotates clockwise. Move.
このとき、弓バネ13は、最初はこの可動部材１の回動
に抗するが、可動部材１が中立位置を越えて図上右側に
傾くと、第二の形状記憶合金16の形状回復力と順方向、
すなわち可動部材１をより時計方向に回動させるように
付勢するようになるとともに、共通接点10を第一の接点
11側に付勢するようになる。したがって、可動部材１が
第１図および６図に示される第二の位置に戻り、共通接
点10は第一の接点11から離間し、第二の接点12に接触し
た状態となり、第二の形状記憶合金16に対する通電は停
止される。At this time, the bow spring 13 initially resists the rotation of the movable member 1, but when the movable member 1 is tilted rightward in the drawing beyond the neutral position, the shape recovery force of the second shape memory alloy 16 is reduced. Forward direction,
That is, the movable member 1 is urged to rotate more clockwise, and the common contact 10 is
It becomes biased to 11 side. Accordingly, the movable member 1 returns to the second position shown in FIGS. 1 and 6, and the common contact 10 is separated from the first contact 11 and comes into contact with the second contact 12 to form the second shape. The energization of the memory alloy 16 is stopped.
このように本装置は、可動部材１が第一の位置にある
状態（第２図および７図の状態）と第二の位置にある状
態（第１図および６図の状態）との２つの安定状態をと
ることができ、かつ電源入力端子17,18に印加する電圧
の極性を選択することにより前記２つの安定状態の一方
の状態から他方の状態に自由に遷移させることができ
る。As described above, the present apparatus has two states, that is, the state in which the movable member 1 is in the first position (the state in FIGS. 2 and 7) and the state in which the movable member 1 is at the second position (the state in FIGS. 1 and 6). A stable state can be obtained, and by selecting the polarity of the voltage applied to the power input terminals 17 and 18, it is possible to freely transition from one of the two stable states to the other.
そして、万一、第一の形状記憶合金14または第二の形
状記憶合金16が十分冷却しないうちに他方の形状記憶合
金を通電加熱してしまい、両方の形状記憶合金14,16が
互いに引張り合い状態になった場合には、第３図のよう
に弓バネ13に抗して可動部材１が軸状接点３に対し長穴
２に沿って移動し、可動部材側接点４が軸状接点３から
離間されるため、形状記憶合金14,16への通電が停止さ
れるので、両方の形状記憶合金14,16が互いに同時に形
状回復力を作用させ合って永久変形してしまうのが防止
される。In the unlikely event that the first shape memory alloy 14 or the second shape memory alloy 16 is not sufficiently cooled, the other shape memory alloy is electrically heated and both the shape memory alloys 14 and 16 are pulled together. In this state, the movable member 1 moves along the elongated hole 2 with respect to the axial contact 3 against the bow spring 13 as shown in FIG. Since the power is supplied to the shape memory alloys 14 and 16, the shape memory alloys 14 and 16 are prevented from being permanently deformed by simultaneously applying shape recovery forces to each other. .
また、本実施例では、前述のように共通接点10、第一
の接点11、および第二の接点12等の作用により、第一の
形状記憶合金14に通電して可動部材１を第二の位置から
第一の位置に回動させたときは、第一の形状記憶合金14
に対する通電が自動的に停止され、第二の形状記憶合金
16に通電して可動部材１を第一の位置から第二の位置に
回動させたときは、第二の形状記憶合金16に対する通電
が自動的に停止されるようになっているので、形状記憶
合金14,16の過熱が防止される。Further, in the present embodiment, as described above, the action of the common contact 10, the first contact 11, the second contact 12, and the like causes the first shape memory alloy 14 to be energized to move the movable member 1 to the second position. When rotated from the position to the first position, the first shape memory alloy 14
Power is automatically stopped for the second shape memory alloy
When the movable member 1 is rotated from the first position to the second position by energizing the power supply 16, the power supply to the second shape memory alloy 16 is automatically stopped. Overheating of the memory alloys 14, 16 is prevented.
第８〜９図は本発明の他の実施例を示す。 8 and 9 show another embodiment of the present invention.
基台21には良導体からなる棒状の可動部材22が直線方
向（図上水平方向）にスライド可能に嵌合されている。
前記基台21の両端には通電切替用接点23,24がそれぞれ
取り付けられており、これらの接点23,24は可動部材22
に取り付けられた通電切替用接点25,26にそれぞれ接離
されるようになっている。ここにおいて、通電切替用接
点23および25は本実施例における第一の通電切替用接点
対を構成し、通電切替用接点24および26は本実施例にお
ける第二の通電切替用接点を構成する。また、前記接点
25,26はストッパとしての機能も果たすようになってお
り、これらの接点25,26に接点23,24がそれぞれ当接する
と、可動部材22はそれ以上それまでの進行方向には移動
できなくなるようになっている。A rod-shaped movable member 22 made of a good conductor is fitted to the base 21 so as to be slidable in a linear direction (horizontal direction in the drawing).
Energization switching contacts 23 and 24 are attached to both ends of the base 21, respectively.
Are respectively connected to and separated from the energization switching contacts 25 and 26 attached to the switch. Here, the energization switching contacts 23 and 25 constitute a first energization switching contact pair in this embodiment, and the energization switching contacts 24 and 26 constitute a second energization switching contact in this embodiment. Also, the contact
25 and 26 also function as stoppers, and when the contacts 23 and 24 abut against these contacts 25 and 26, the movable member 22 can no longer move in the forward traveling direction. It has become.
前記可動部材22のスライド方向と平行方向にスライド
軸27が設けられており、このスライド軸27には、該スラ
イド軸27に沿ってスライド可能にバネ支持体28が嵌合さ
れている。前記バネ支持体28と可動部材22との間には弓
バネ29が介装されており、この弓バネ29は、図上、バネ
支持体28が可動部材22に関し所定の境界位置より左方に
あるときはバネ支持体28を左方に付勢するとともに可動
部材22を右方に付勢し、逆に、バネ支持体28が可動部材
22に関し前記所定の境界位置より右方にあるときはバネ
支持体28を右方に付勢するとともに可動部材22を左方に
付勢するようになっている。なお、前記弓バネ29は可動
部材22とは電気的に絶縁されている。A slide shaft 27 is provided in a direction parallel to the sliding direction of the movable member 22, and a spring support 28 is fitted to the slide shaft 27 so as to be slidable along the slide shaft 27. A bow spring 29 is interposed between the spring support 28 and the movable member 22, and the bow spring 29 is configured such that the spring support 28 is located on the left side of a predetermined boundary position with respect to the movable member 22 in the drawing. In some cases, the spring support 28 is urged to the left and the movable member 22 is urged to the right.
With respect to 22, when it is to the right of the predetermined boundary position, the spring support 28 is urged to the right and the movable member 22 is urged to the left. The bow spring 29 is electrically insulated from the movable member 22.
前記バネ支持体28には、板状の同時形状回復防止用共
通接点30並びに良導体からなる第一の板バネ31および第
二の板バネ32の下端部がそれぞれ支持されており、図
上、第一の板バネ31は共通接点30の左側、第二の板バネ
32は右側に配されている。前記第一の板バネ31の上端部
には第一の同時形状回復防止用接点33、第二の板バネ32
の上端部には第二の同時形状回復防止用接点34がそれぞ
れ設けられており、これらの接点33,34は常時は板バネ3
1,32の弾力により共に共通接点30に接触されている。そ
して、前記共通接点30は電源35の一方の極に電気的に接
続されており、この電源35の他方の極は可動部材22に接
続されている。The spring support 28 supports the lower ends of a first leaf spring 31 and a second leaf spring 32 made of a good conductor and a common contact 30 for preventing simultaneous recovery of the shape of the plate, respectively. One leaf spring 31 is on the left side of the common contact 30, the second leaf spring
32 is located on the right. At the upper end of the first leaf spring 31, a first contact 33 for preventing simultaneous shape recovery, a second leaf spring 32
Are provided at the upper end portion thereof with contacts 34 for preventing simultaneous shape recovery, and these contacts 33, 34 are
Both of them are in contact with the common contact 30 by the elasticity of 1,32. The common contact 30 is electrically connected to one pole of a power supply 35, and the other pole of the power supply 35 is connected to the movable member 22.
前記第一の接点33とこの接点33の左方に設けられた支
持材36との間にはTi−Ni合金等からなる線材状の第一の
形状記憶合金37が実質的に可動部材22のスライド方向と
平行方向に渡されている。前記第二の接点34とこの接点
34の右方に設けられた支持材38との間にはTi−Ni合金等
からなる線材状の第二の形状記憶合金39が実質的に可動
部材22のスライド方向と平行方向に渡されている。ここ
で、前記支持材36および38は基台21に対して位置関係を
固定されている。また、前記第一の形状記憶合金37およ
び第二の形状記憶合金39は、それぞれ支持材36,38間の
距離の半分より若干短い長さを記憶している。Between the first contact point 33 and the support member 36 provided on the left side of the contact point 33, a wire-shaped first shape memory alloy 37 made of a Ti-Ni alloy or the like is substantially used for the movable member 22. It is passed in the direction parallel to the sliding direction. The second contact 34 and this contact
Between the support member 38 provided on the right side of 34, a wire-shaped second shape memory alloy 39 made of a Ti-Ni alloy or the like is passed substantially in a direction parallel to the sliding direction of the movable member 22. I have. Here, the support members 36 and 38 have a fixed positional relationship with respect to the base 21. Further, the first shape memory alloy 37 and the second shape memory alloy 39 each store a length slightly shorter than half the distance between the support members 36 and 38.
前記第一の形状記憶合金37の左端部はスイッチ40を介
して接点23に接続されており、前記第二の形状記憶合金
39の右端部はスイッチ41を介して接点23に接続されてい
る。The left end of the first shape memory alloy 37 is connected to the contact 23 via a switch 40, and the second shape memory alloy 37
The right end of 39 is connected to the contact 23 via the switch 41.
次に、本実施例の作動を説明する。 Next, the operation of the present embodiment will be described.
第８図において、バネ支持体28は右方に移動してい
て、弓バネ29は可動部材22を左方に付勢して最左方に移
動させ、接点24,26を接触させている。この第８図にお
ける可動部材22の位置が本実施例における可動部材22の
第二の位置である。In FIG. 8, the spring support 28 is moving to the right, and the bow spring 29 urges the movable member 22 to the left to move it to the leftmost, bringing the contacts 24 and 26 into contact. The position of the movable member 22 in FIG. 8 is the second position of the movable member 22 in this embodiment.
この状態において、スイッチ41は開放し、スイッチ40
を閉じれば、電源35−共通接点30−第一の接点33−第一
の形状記憶合金37−スイッチ40−接点24,26−可動部材2
2−電源35の経路で電流が流れ、第一の形状記憶合金37
が所定の温度範囲にまで加熱され、形状記憶効果によ
り、記憶している長さに復帰しようとして収縮するの
で、第一の形状記憶合金37は第一のバネ板31を介してバ
ネ支持体28を左方に引張り、バネ支持体28は左方に移動
されて行く。このとき、弓バネ29は、最初はこのバネ支
持体28の左方への移動に抗するが、バネ支持体28が可動
部材22に対し前記境界位置より左方に来ると、逆にバネ
支持体28を左方に付勢するようになるとともに可動部材
22を右方に付勢するようになる。これにより、第９図の
ように可動部材22は接点25が接点23に当接するまで右方
に移動し、そこで停止する。この第９図の最右方位置が
本実施例における可動部材22の第一の位置である。In this state, the switch 41 is opened and the switch 40
Is closed, the power supply 35-common contact 30-first contact 33-first shape memory alloy 37-switch 40-contacts 24 and 26-movable member 2
2—Current flows through the path of the power supply 35, and the first shape memory alloy 37
Is heated to a predetermined temperature range, and shrinks to return to the stored length by the shape memory effect, so that the first shape memory alloy 37 is connected to the spring support 28 via the first spring plate 31. Is pulled to the left, and the spring support 28 is moved to the left. At this time, the bow spring 29 initially resists the movement of the spring support 28 to the left, but when the spring support 28 comes to the left of The body 28 is urged to the left and the movable member
22 will be urged to the right. Thereby, as shown in FIG. 9, the movable member 22 moves rightward until the contact 25 comes into contact with the contact 23, and stops there. The rightmost position in FIG. 9 is the first position of the movable member 22 in this embodiment.
なお、可動部材22が右方に移動し始めた時点で接点2
4,26は離間し、第一の形状記憶合金37に対する通電はそ
の時点で停止されるので、第一の形状記憶合金37の過熱
が防止される。When the movable member 22 starts moving to the right, the contact 2
4 and 26 are separated from each other, and the current supply to the first shape memory alloy 37 is stopped at that time, so that the first shape memory alloy 37 is prevented from overheating.
次に、第９図のように可動部材22が最右方に移動し、
接点23,25が接触しており、かつ第一の形状記憶合金37
が十分冷却した状態において、スイッチ40は開放し、ス
イッチ41を閉じれば、電源35−共通接点30−第二の接点
34−第二の形状記憶合金39−スイッチ41−接点23,25−
可動部材22−電源35の経路で電流が流れ、第二の形状記
憶合金39が所定の温度範囲にまで加熱され、形状記憶効
果により、記憶している長さに復帰しようとして収縮す
るので、第二の形状記憶合金39は第二のバネ板32を介し
てバネ支持体28を右方に引張り、バネ支持体28は右方に
移動されて行く。このとき、弓バネ29は、最初はこのバ
ネ支持体28の右方への移動に抗するが、バネ支持体28が
可動部材22に対し前記境界位置より右方に来ると、逆に
バネ支持体28を右方に付勢するようになるとともに可動
部材22を左方に付勢するようになる。これにより、可動
部材22は第８図の接点25が接点23に当接する最右方位置
（第二の位置）に戻り、そこで停止する。Next, as shown in FIG. 9, the movable member 22 moves to the rightmost,
The contacts 23 and 25 are in contact and the first shape memory alloy 37
When the switch 40 is opened and the switch 41 is closed in a state where the power supply 35 is sufficiently cooled, the power supply 35-the common contact 30-the second contact
34-second shape memory alloy 39-switch 41-contacts 23, 25-
An electric current flows through the path of the movable member 22-the power supply 35, and the second shape memory alloy 39 is heated to a predetermined temperature range, and shrinks to return to the stored length by the shape memory effect. The second shape memory alloy 39 pulls the spring support 28 to the right via the second spring plate 32, and the spring support 28 is moved to the right. At this time, the bow spring 29 initially resists the movement of the spring support 28 to the right, but when the spring support 28 comes to the right of the boundary position with respect to the movable member 22, the spring support The body 28 is urged rightward and the movable member 22 is urged leftward. As a result, the movable member 22 returns to the rightmost position (second position) where the contact 25 in FIG. 8 abuts on the contact 23, and stops there.
なお、可動部材22が左方に移動し始めた時点で接点2
3,25は離間し、第二の形状記憶合金39に対する通電はそ
の時点で停止されるので、第二の形状記憶合金39の過熱
が防止される。When the movable member 22 starts moving to the left, the contact 2
3, 25 are separated from each other, and the energization to the second shape memory alloy 39 is stopped at that point, so that the second shape memory alloy 39 is prevented from overheating.
このように本装置においては、可動部材22が最左方
（第二の位置）に移動した状態と、可動部材22が最右方
（第一の位置）に移動した状態との２つの安定状態をと
ることができ、かつスイッチ40,41を開閉して第一およ
び第二の形状記憶合金37,39を加熱することにより、前
記２つの安定状態の一方から他方に自由に遷移させるこ
とができる。As described above, in the present apparatus, two stable states of the state where the movable member 22 has moved to the leftmost (second position) and the state where the movable member 22 has moved to the rightmost (first position) And by opening and closing the switches 40 and 41 to heat the first and second shape memory alloys 37 and 39, it is possible to freely transition from one of the two stable states to the other. .
そして、万一、第一の形状記憶合金37または第二の形
状記憶合金39が十分冷却しないうちに他方の形状記憶合
金を通電加熱してしまい、両方の形状記憶合金37,39が
互いに引張り合い状態になった場合には、第10図のよう
に共通接点30から第一および第二の接点33,34が離間さ
れるため、形状記憶合金37または39への通電が停止さ
れ、両方の形状記憶合金37,39が互いに同時に形状回復
力を作用させ合って永久変形してしまうのが防止され
る。In the unlikely event that the first shape memory alloy 37 or the second shape memory alloy 39 is not sufficiently cooled, the other shape memory alloy is heated by energization, and the two shape memory alloys 37 and 39 are pulled by each other. When the state is reached, the first and second contacts 33 and 34 are separated from the common contact 30 as shown in FIG. 10, so that the current supply to the shape memory alloy 37 or 39 is stopped, and both shapes are turned off. The memory alloys 37 and 39 are prevented from being permanently deformed by simultaneously applying a shape restoring force to each other.
さらに、本実施例では、可動部材22がバネ（バネ板3
3,34および弓バネ29）を介して形状記憶合金37,39によ
り駆動されるので、可動部材22に過負荷が掛っても形状
記憶合金37,39には直接その過負荷が作用しない。そし
て、可動部材22が過負荷により動けない状態において形
状記憶合金37または39に通電された場合には、形状記憶
合金37または39により接点33または34が引張られて共通
接点30から離間されるため、形状記憶合金37または39へ
の通電が停止され、それ以上の形状記憶合金37または39
の加熱が防止されるので、過負荷が作用しても形状記憶
合金37,39が損傷することがない。Further, in the present embodiment, the movable member 22 is a spring (spring plate 3).
Since the movable members 22 are driven by the shape memory alloys 37 and 39 via the bow springs 29), the shape memory alloys 37 and 39 are not directly overloaded. When the shape memory alloy 37 or 39 is energized in a state where the movable member 22 cannot move due to overload, the contact 33 or 34 is pulled by the shape memory alloy 37 or 39 and is separated from the common contact 30. The power supply to the shape memory alloy 37 or 39 is stopped, and the further shape memory alloy 37 or 39 is turned off.
Is prevented from being heated, so that the shape memory alloys 37 and 39 are not damaged by an overload.
以上のように本発明は、一方の形状記憶合金が十分冷
却しないうちに他方の形状記憶合金を加熱しても、両方
の形状記憶合金が互いに同時に形状回復力を作用させ合
って永久変形してしまうことがないという優れた効果を
得られるものである。As described above, according to the present invention, even if one of the shape memory alloys is not sufficiently cooled, even if the other shape memory alloy is heated, the two shape memory alloys simultaneously apply a shape recovery force to each other and are permanently deformed. An excellent effect of not being lost can be obtained.
第１図は本発明による形状記憶合金装置の一実施例を、
一つの安定状態において示す正面図、第２図は該実施例
を、他の安定状態において示す正面図、第３図は該実施
例を、一方の形状記憶合金が十分冷却しないうちに他方
の形状記憶合金が加熱された状態において示す正面図、
第４図は該実施例における可動部材22を示す正面図、第
５図は該実施例における可動部材側接点４を示す正面
図、第６図および７図は該実施例を、電気的接続関係を
主とし、機械的構成を簡略化して示す概略構成図、第８
図は本発明の他の実施例を、一つの安定状態において示
す正面図、第９図は該実施例を、他の安定状態において
示す正面図、第10図は該実施例を、一方の形状記憶合金
が十分冷却しないうちに他方の形状記憶合金が加熱され
た状態において示す正面図である。 １……可動部材、２……長穴、３……軸状接点、４……
可動部材側接点、11……第一の通電切替用接点、12……
第二の通電切替用接点、13……弓バネ、14……第一の形
状記憶合金、16……第二の形状記憶合金、22……可動部
材、23,24……第一の通電切替用接点、25,26……第二の
通電切替用接点、28……バネ支持体、29……弓バネ、30
……同時形状回復防止用共通接点、31……第一の板バ
ネ、32……第二の板バネ、33……第一の同時形状回復防
止用接点、34……第二の同時形状回復防止用接点、37…
…第一の形状記憶合金、39……第二の形状記憶合金。FIG. 1 shows an embodiment of a shape memory alloy device according to the present invention.
FIG. 2 is a front view showing one embodiment in a stable state, FIG. 2 is a front view showing the embodiment in another stable state, and FIG. 3 is a front view showing the embodiment in another stable state. Front view showing the memory alloy in a heated state,
FIG. 4 is a front view showing the movable member 22 in the embodiment, FIG. 5 is a front view showing the movable member side contact 4 in the embodiment, and FIGS. 6 and 7 show the electrical connection relationship in the embodiment. And FIG. 8 is a schematic diagram showing a simplified mechanical configuration.
FIG. 9 is a front view showing another embodiment of the present invention in one stable state, FIG. 9 is a front view showing the embodiment in another stable state, and FIG. FIG. 9 is a front view showing a state where the other shape memory alloy is heated before the memory alloy is sufficiently cooled. 1 ... movable member, 2 ... elongated hole, 3 ... axial contact, 4 ...
Movable member side contact, 11… First energization switching contact, 12…
Second energizing switching contact, 13 ... bow spring, 14 ... first shape memory alloy, 16 ... second shape memory alloy, 22 ... movable member, 23, 24 ... first energizing switching Contacts, 25, 26 ... second energization switching contact, 28 ... spring support, 29 ... bow spring, 30
… Simultaneous shape recovery prevention common contact, 31… First leaf spring, 32… Second leaf spring, 33… First simultaneous shape recovery prevention contact, 34… Second simultaneous shape recovery Preventive contacts, 37…
... the first shape memory alloy, 39 ... the second shape memory alloy.
Claims (4)
動部材と、この可動部材に連係されており、形状回復時
に前記可動部材を前記第一の位置に向って動かそうとす
るように形状回復力を作用する第一の形状記憶合金と、
前記可動部材に連係されており、形状回復時に前記可動
部材を前記第二の位置に向って動かそうとするように形
状回復力を作用する第二の形状記憶合金と、前記可動部
材が所定位置より前記第一の位置側にあるときは前記可
動部材を前記第一の位置に向って付勢する一方、前記可
動部材が前記所定位置より前記第二の位置側にあるとき
は前記可動部材を前記第二の位置に向って付勢する可動
部材付勢バネと、常時は互いに接触されているが、前記
第一および第二の形状記憶合金が同時に所定以上の大き
さの形状回復力を発生している状態になると互いに離間
される同時形状回復防止用接点と、この同時形状回復防
止用接点を介して前記第一および第二の形状記憶合金に
それぞれ電流を流す第一の電流路および第二の電流路と
を有してなるバイステーブル形状記憶合金装置。1. A movable member movable between a first position and a second position, the movable member being linked to the movable member, and moving the movable member toward the first position at the time of shape recovery. A first shape memory alloy acting a shape recovery force so that
A second shape memory alloy that is linked to the movable member and that exerts a shape restoring force so as to move the movable member toward the second position during shape recovery; and When the movable member is closer to the first position, the movable member is biased toward the first position, while when the movable member is closer to the second position than the predetermined position, the movable member is pressed. The movable member biasing spring that biases toward the second position is always in contact with each other, but the first and second shape memory alloys simultaneously generate a shape recovery force of a predetermined magnitude or more. A contact for preventing simultaneous shape recovery that is separated from each other when the contact is made, a first current path and a second current path for flowing current through the first and second shape memory alloys via the contact for preventing simultaneous shape recovery, respectively. A bi-directional current path Table shape memory alloy device.
記可動部材が前記第一の位置にあるときは互いに接触さ
れているが、前記可動部材が前記第二の位置へ移動する
と互いに離間する第一の通電切替用接点対と、前記第二
の電流路中に設けられており、前記可動部材が前記第二
の位置にあるときは互いに接触されているが、前記可動
部材が前記第一の位置へ移動すると互いに離間する第二
の通電切替用接点対とを有してなる請求項１記載のバイ
ステーブル形状記憶合金装置。2. The apparatus according to claim 1, wherein the movable member is provided in the first current path and is in contact with each other when the movable member is at the first position, but when the movable member moves to the second position. A first energization switching contact pair that is separated from each other, and is provided in the second current path, and is in contact with each other when the movable member is at the second position, but the movable member is 2. The bistable shape memory alloy device according to claim 1, further comprising: a second pair of energization switching contacts separated from each other when moved to the first position.
記第一の位置と前記第二の位置との間を回動可能かつ該
軸状接点に対し所定の移動方向に移動可能なように該軸
状接点に支持された前記可動部材と、この可動部材に取
り付けられた可動部材側接点と、前記可動部材を前記可
動部材側接点が前記軸状接点に接触されることとなる向
きに付勢するバネとを有してなり、 前記軸状接点および前記可動部材側接点は前記同時形状
回復防止用接点を構成する請求項１または２記載のバイ
ステーブル形状記憶合金装置。3. An axial contact, rotatable about said axial contact between said first position and said second position, and movable in a predetermined movement direction with respect to said axial contact. The movable member supported by the axial contact, the movable member-side contact attached to the movable member, and the direction in which the movable member-side contact comes into contact with the axial contact. 3. The vice-table shape memory alloy device according to claim 1, further comprising a spring that biases the shaft-shaped contact and the movable-member-side contact constituting the contact for preventing simultaneous shape recovery. 4.
記直線方向と平行方向に移動可能なバネ支持体と、前記
バネ支持体に支持された共通接点と、前記バネ支持体に
支持された第一のバネ体および第二のバネ体と、前記第
一のバネ体に設けられ、該第一のバネ体の弾力により前
記第一の位置側から前記第二の位置側に向って前記共通
接点に押圧される第一の接点と、前記第二のバネ体に設
けられ、該第二のバネ体の弾力により前記第二の位置側
から前記第一の位置側に向って前記共通接点に押圧され
る第二の接点と、前記可動部材と前記バネ支持体との間
に介装された可動部材付勢バネと、形状回復時に形状回
復力を前記第一のバネ体を介して前記バネ支持体に、該
バネ支持体を前記第一の位置側に移動させるように作用
する前記第一の形状記憶合金と、形状回復時に形状回復
力を前記第二のバネ体を介して前記バネ支持体に、該バ
ネ支持体を前記第二の位置側に移動させるように作用す
る前記第二の形状記憶合金とを有してなり、 前記可動部材付勢バネは、前記バネ支持体が前記可動部
材に関し所定の境界位置より前記第一の位置側にあると
きは前記バネ支持体を前記第一の位置に向って付勢する
とともに前記可動部材を前記第二の位置に向って付勢
し、前記バネ支持体が前記可動部材に関し前記所定の境
界位置より前記第二の位置側にあるときは前記バネ支持
体を前記第二の位置に向って付勢するとともに前記可動
部材を前記第一の位置に向って付勢するようになってお
り、前記共通接点、前記第一の接点および前記第二の接
点は前記同時形状回復防止用接点を構成する請求項１ま
たは２記載のバイステーブル形状記憶合金装置。4. A movable member movable in a linear direction, a spring support movable in a direction parallel to the linear direction, a common contact supported by the spring support, and supported by the spring support. A first spring body and a second spring body, provided on the first spring body, the elasticity of the first spring body from the first position side toward the second position side. A first contact pressed against a common contact, and the common contact provided on the second spring body from the second position side to the first position side by elasticity of the second spring body. A second contact pressed against the movable member and a spring biased by a movable member interposed between the movable member and the spring support, and a shape restoring force at the time of shape restoration through the first spring body. The first shape acting on a spring support to move the spring support toward the first position. A memory alloy, and a shape recovery force acting on the spring support via the second spring body at the time of shape recovery, the second shape memory acting to move the spring support to the second position side; The movable member biasing spring, when the spring support is located at the first position side from a predetermined boundary position with respect to the movable member, moves the spring support to the first position. And biases the movable member toward the second position, and when the spring support is closer to the second position than the predetermined boundary position with respect to the movable member, the spring is The movable member is urged toward the first position while urging the support toward the second position, and the common contact, the first contact and the second contact are urged. The contact constitutes the contact for preventing simultaneous shape recovery. Bistable shape memory alloy device 1 or 2 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23228288A JP2588003B2 (en) | 1988-09-19 | 1988-09-19 | Vise table shape memory alloy device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23228288A JP2588003B2 (en) | 1988-09-19 | 1988-09-19 | Vise table shape memory alloy device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0281961A JPH0281961A (en) | 1990-03-22 |
| JP2588003B2 true JP2588003B2 (en) | 1997-03-05 |
Family
ID=16936784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23228288A Expired - Lifetime JP2588003B2 (en) | 1988-09-19 | 1988-09-19 | Vise table shape memory alloy device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2588003B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4067282B2 (en) * | 2001-03-13 | 2008-03-26 | トキコーポレーション株式会社 | Shape memory alloy actuator |
| JP5328950B2 (en) * | 2012-03-26 | 2013-10-30 | キヤノン株式会社 | Actuator device |
-
1988
- 1988-09-19 JP JP23228288A patent/JP2588003B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0281961A (en) | 1990-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |