JPH04112426A - Contact opening and closing mechanism using shape memory alloy - Google Patents
Contact opening and closing mechanism using shape memory alloyInfo
- Publication number
- JPH04112426A JPH04112426A JP22843890A JP22843890A JPH04112426A JP H04112426 A JPH04112426 A JP H04112426A JP 22843890 A JP22843890 A JP 22843890A JP 22843890 A JP22843890 A JP 22843890A JP H04112426 A JPH04112426 A JP H04112426A
- Authority
- JP
- Japan
- Prior art keywords
- movable member
- shape memory
- closing mechanism
- contact opening
- terminal
- 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.)
- Pending
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 35
- 229910001285 shape-memory alloy Inorganic materials 0.000 title claims abstract description 23
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910000734 martensite Inorganic materials 0.000 abstract description 8
- 239000004020 conductor Substances 0.000 description 11
- 238000003780 insertion Methods 0.000 description 9
- 230000037431 insertion Effects 0.000 description 9
- 229910000679 solder Inorganic materials 0.000 description 8
- 230000009466 transformation Effects 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229910017773 Cu-Zn-Al Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910018054 Ni-Cu Inorganic materials 0.000 description 1
- 229910018481 Ni—Cu Inorganic materials 0.000 description 1
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H61/00—Electrothermal relays
- H01H61/01—Details
- H01H61/0107—Details making use of shape memory materials
- H01H2061/0115—Shape memory alloy [SMA] actuator formed by coil spring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/145—Electrothermal mechanisms using shape memory materials
Landscapes
- Thermally Actuated Switches (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、落雷、回路の短絡等に起因する過電流から
各種の機器を保護する接点開閉機構に係する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a contact switching mechanism that protects various devices from overcurrent caused by lightning strikes, short circuits, and the like.
（従来の技術〕
従来のこの種の接点開閉機構としては、ヒユーズ、ノー
ヒユーズブレーカ等が知られている。ヒユーズは、簡単
な構成であるが、−度動作すると溶断してしまって再使
用できないという欠点がある。また、ノーヒユーズブレ
ーカは、−度動作してもリセフトすることにより何度で
も使用できるが、部品点数が多く構成が複雑であるため
、大型で価格が高いという欠点がある。(Prior art) Fuses, no-fuse breakers, etc. are known as conventional contact opening/closing mechanisms of this type.Fuses have a simple structure, but they melt after being operated for -0 degrees and cannot be reused. Although no-fuse breakers can be used as many times as they like by being reset even after they have been operated, they have the disadvantage of being large and expensive because they have a large number of parts and a complicated structure.
一方、これらの欠点を形状記憶合金を用いて解決しよう
とする試みが、特公平１−３６６４８号公報に開示され
ている。第４図は形状記憶合金を用いた従来の接点開閉
機構を示す構成図である。On the other hand, an attempt to solve these drawbacks using a shape memory alloy is disclosed in Japanese Patent Publication No. 1-36648. FIG. 4 is a configuration diagram showing a conventional contact opening/closing mechanism using a shape memory alloy.
この接点開閉機構は、形状記憶合金で形成した導体１０
１．１０２を平常時に変形させることにより、それらの
先端１０３．１０４が互いに接触するように支持部１０
５．１０６に固定したものである。そして、先端１０３
．１０４が接触する部分は、導体１０１．１０２が復元
する温度よりも低い融点を有する半田、樹脂等によって
接着されている。This contact opening/closing mechanism consists of a conductor 10 made of a shape memory alloy.
1. By deforming 102 under normal conditions, the support part 10 is made such that their tips 103 and 104 are in contact with each other.
It is fixed at 5.106. And the tip 103
．． The portions 104 come in contact with are bonded with solder, resin, or the like having a melting point lower than the temperature at which the conductors 101 and 102 recover.
また、導体１０１．１０２に過電流が流れると、導体１
０１．１０２の温度が自己発熱によって上昇し先端１０
３．１０４の半田等が溶融する。そしてさらに導体１０
１．１０２の温度が上昇すると、導体１０１．１０２の
形状が復元し、先端１０３．１０４が互いに離れて過電
流を遮断する。Also, when an overcurrent flows through the conductors 101 and 102, the conductor 1
01.102 temperature rises due to self-heating and the tip 10
3.104 solder etc. melts. And further conductor 10
When the temperature of 1.102 increases, the shape of the conductor 101.102 is restored and the tips 103.104 move away from each other to interrupt the overcurrent.
そして、先端１０３．１０４が離れて過電流を遮断した
後、先端１０３．１０４が接触するように導体１０１．
１０２を変形させて、半田等で先端１０３．１０４を接
着して再使用する。このように、この接点開閉機構は簡
単な構成で再使用を図ろうとするものである。Then, after the tips 103, 104 are separated to cut off the overcurrent, the conductors 101.104 are brought into contact with each other.
102 is deformed and the tips 103 and 104 are bonded with solder or the like and reused. In this way, this contact opening/closing mechanism has a simple structure and is intended to be reused.
〔発明が解決しようとする課題］
しかしながら、このような形状記憶合金を用いた従来の
接点開閉機構では、先端１０３．１０４の半田等が溶融
してから、導体１０１．１０２の形状が復元して先端１
０３．１０４が離れて通電流を遮断するまでの状態が、
非常に不安定であるという問題がある。すなわち、先端
１０３．１０４が半田等で接着されている間は、先端１
０３．１０４間の接触抵抗が十分に低い。ところが半田
等が溶融すると、先端１０３．１０４を接着する力がな
くなるばかりか、半田等の蕉発、流動、落下などを生し
ることがある。そのため、先端１０３．１０４間の接触
抵抗が高くなったり、先端１０３．１０４間が開放して
しまったりする。したがって、導体１０１．１０２を流
れる電流が変化して接点開閉機構の所期の特性が得られ
なくなる。[Problems to be Solved by the Invention] However, in the conventional contact opening/closing mechanism using such a shape memory alloy, the shape of the conductor 101, 102 is restored after the solder, etc. at the tip 103, 104 is melted. Tip 1
03.The state until 104 separates and interrupts the current flow is as follows.
The problem is that it is very unstable. That is, while the tips 103 and 104 are bonded with solder or the like, the tips 1
The contact resistance between 03 and 104 is sufficiently low. However, if the solder or the like melts, not only will it lose its ability to bond the tips 103 and 104, but the solder or the like may swell, flow, or fall. Therefore, the contact resistance between the tips 103 and 104 becomes high, or the tips 103 and 104 become open. Therefore, the current flowing through the conductors 101 and 102 changes, making it impossible to obtain the desired characteristics of the contact opening/closing mechanism.
また、この接点開閉機構を繰り返し使用する場合、先端
１０３．１０４が互いに接触するように導体１０１．１
０２を変形させた後、半田等で先端１０３．１０４を接
着する必要があり、極めて煩雑であった。In addition, when using this contact opening/closing mechanism repeatedly, the conductors 101.1
After deforming 02, it was necessary to bond the tips 103 and 104 with solder or the like, which was extremely complicated.
そこで、この発明の目的は、安定した特性を有し、簡単
な操作で繰り返し使用できる接点開閉機構を提供するこ
とにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a contact opening/closing mechanism that has stable characteristics and can be used repeatedly with simple operation.
請求項１記載の形状記憶合金を用いた接点開閉機構は、
形状記憶合金からなる可動部材と、この可動部材の一端
を着脱自在に接続した着脱端子と、上記可動部材の他端
を固定して接続した固定端子とを備え、上記可動部材に
は過電流による自己発熱によって上記可動部材の一端が
上記着脱端子から離脱する形状が記憶されたものである
。A contact opening/closing mechanism using a shape memory alloy according to claim 1,
A movable member made of a shape memory alloy, a removable terminal to which one end of the movable member is removably connected, and a fixed terminal to which the other end of the movable member is fixedly connected are provided. A shape is memorized in which one end of the movable member is detached from the detachable terminal due to self-heating.
請求項２記戦の形状記憶合金を用いた接点開閉機構は、
上記可動部材がコイルばね状であり、この可動部材には
過電流による自己発熱によって縮小して上記着脱端子か
ら離脱する形状が記憶されたことを特徴とするものであ
る。A contact opening/closing mechanism using a shape memory alloy according to claim 2,
The movable member has a coil spring shape, and the movable member has a memorized shape that shrinks and separates from the detachable terminal due to self-heating caused by overcurrent.
この発明に係る接点開閉機構では、形状記憶合金からな
る可動部材の一端が着脱自在に端子に接続され、可動部
材の他端が固定して端子に接続され、保護すべき配線に
接続される。両端子間に過電流が流れると、可動部材の
温度はジュール熱によりマルテンサイト変態温度を超え
る。すると、形状記憶合金が逆変態して母相に至り、可
動部材は記憶された形状に変形しようとする。その結果
、可動部材の復元力が可動部材の一端を端子に接続して
いる挟持力よりも太いため、可動部材の一端が端子から
離脱して電流を遮断する。この動作は瞬時に行われるの
で、可動部材の一端が端子に接続された部分すなわち接
点の動作前における接触抵抗は動作前では非常に安定し
ている。In the contact opening/closing mechanism according to the present invention, one end of the movable member made of a shape memory alloy is detachably connected to the terminal, and the other end of the movable member is fixedly connected to the terminal and connected to the wiring to be protected. When an overcurrent flows between both terminals, the temperature of the movable member exceeds the martensitic transformation temperature due to Joule heat. Then, the shape memory alloy undergoes reverse transformation and reaches the parent phase, and the movable member attempts to deform into the memorized shape. As a result, since the restoring force of the movable member is greater than the clamping force connecting one end of the movable member to the terminal, one end of the movable member separates from the terminal and interrupts the current. Since this operation occurs instantaneously, the contact resistance of the portion where one end of the movable member is connected to the terminal, that is, the contact point, is very stable before operation.
また、可動部材をコイルばね状にすると、形状記憶前後
の変位量が大きくとれ、端子間の離脱が確実に行われる
。Furthermore, if the movable member is formed into a coil spring shape, the amount of displacement before and after shape memory can be large, and the terminals can be reliably separated.
さらに、一端が端子から離脱した可動部材は、変形を加
えることにより、一端が端子に再び接続される。Furthermore, the movable member whose one end has been separated from the terminal is reconnected to the terminal by applying deformation.
第１１ないし第３図はこの発明に係る接点開閉Ｗｊ、横
の一実施例を示し、第１図は接点開閉機構およびその取
付台を示す斜視図、第２図は接点開閉機構を取付台に取
付けた状態を示す斜視図、第３図は第２図において可動
部材がマルテンサイト変態温度以上になった場合を示す
斜視図である。11 to 3 show a horizontal embodiment of the contact opening/closing Wj according to the present invention, FIG. 1 is a perspective view showing the contact opening/closing mechanism and its mounting base, and FIG. 2 shows the contact opening/closing mechanism on the mounting base. FIG. 3 is a perspective view showing the attached state, and FIG. 3 is a perspective view showing a case where the movable member in FIG. 2 reaches a temperature equal to or higher than the martensitic transformation temperature.
以下、これらの図面に基づき詳細に説明する。Hereinafter, a detailed explanation will be given based on these drawings.
接点開閉機構１０は、形状記憶合金からなる可動部材１
２と、可動部材１２の一端１４を着脱自在に接続した着
脱端子１６と、可動部材１２の他端１８を固定して接続
した固定端子２０とから概略構成されている。そして、
可動部材１２には過電流による自己発熱によって可動部
材１２の一端１４が着脱端子１６から離脱する形状が記
憶されている。The contact opening/closing mechanism 10 includes a movable member 1 made of a shape memory alloy.
2, a detachable terminal 16 to which one end 14 of the movable member 12 is detachably connected, and a fixed terminal 20 to which the other end 18 of the movable member 12 is fixedly connected. and,
The movable member 12 has a shape memorized in which one end 14 of the movable member 12 separates from the detachable terminal 16 due to self-heating due to overcurrent.
可動部材１２は、形状記憶合金でコイルばね状に形成さ
れている。そして、可動部材１２は、母相において一端
１４が着脱端子１６から離脱するように縮小した状態に
形状記憶処理が施されており、マルテンサイト相におい
て一端１４が着脱端子１６に接続するように伸長した状
態に変形が加えられている。また、可動部材１２の一端
１４には圧着により接続された略細長円柱状の挿入部２
６が設けられている。挿入部２６は、径小の先端２８と
径大の鍔状基端３０とを有している。The movable member 12 is formed of a shape memory alloy into a coil spring shape. The movable member 12 is subjected to shape memory treatment in a contracted state so that one end 14 is detached from the removable terminal 16 in the parent phase, and expanded so that the one end 14 is connected to the removable terminal 16 in the martensitic phase. A modification has been added to the state. Further, an approximately elongated columnar insertion portion 2 is connected to one end 14 of the movable member 12 by crimping.
6 is provided. The insertion portion 26 has a small-diameter distal end 28 and a large-diameter flanged proximal end 30.
着脱端子１６は、挿入部２６と係合する略細長円筒状の
受容部３２を有している。受容部３２には、先端に開口
端３４が形成され、開口端３４から基端４０へ設けられ
た切り割り３６．３６によって挟持片３８．３８が形成
されている。挟持片３８．３８の弾性力に抗して開口端
３４を拡開させ、挿入部２６の先端２８を開口端３４か
ら挿入することによって、挿入部２６が受容部３２に挟
持され電気的接続が得られる。換言すれば、挿入部２６
が受容部３２に挟持されることによって、可動部材１２
の一端１４が着脱端子１６に着脱自在に接続される。な
お、受容部３２０基端４０には導線４２が圧着され、導
線４２には取付片４４が圧着されている。The removable terminal 16 has a substantially elongated cylindrical receiving portion 32 that engages with the insertion portion 26 . The receiving portion 32 has an open end 34 formed at the distal end, and a clamping piece 38.38 is formed by a cut 36.36 provided from the open end 34 to the proximal end 40. By expanding the opening end 34 against the elastic force of the clamping pieces 38 and 38 and inserting the tip 28 of the insertion section 26 through the opening end 34, the insertion section 26 is clamped by the receiving section 32 and electrical connection is established. can get. In other words, the insertion portion 26
The movable member 12 is held by the receiving portion 32.
One end 14 of is detachably connected to a detachable terminal 16. Note that a conducting wire 42 is crimped to the base end 40 of the receiving portion 320, and a mounting piece 44 is crimped to the conducting wire 42.
固定端子２０は、可動部材１２の他＠１Ｂが圧着された
取付片４６によって構成されている。The fixed terminal 20 is constituted by a mounting piece 46 to which the movable member 12 and @1B are crimped.
なお、着脱端子１６、固定端子２０、挿入部２６、受容
部３２等は、導電性の良好な金属で形成されている。ま
た、上記の圧着とは機械的に固着させて電気的接続を得
るための方法である。Note that the removable terminal 16, the fixed terminal 20, the insertion portion 26, the receiving portion 32, etc. are made of a metal with good conductivity. Moreover, the above-mentioned crimping is a method for mechanically fixing and obtaining electrical connection.
取付台５０は、電気的絶縁性を有する合成樹脂等から成
り、取付部５２．５２Ｌこは、導電性の良好な金属から
なる接続片５４．５４が設けられている。The mounting base 50 is made of electrically insulating synthetic resin or the like, and the mounting portions 52.52L are provided with connection pieces 54.54 made of metal with good conductivity.
接点開閉機構１０は、取付片４４．４６の透孔５６．５
６にネジ５８．５８をそれぞれ挿通させ、ネジ５８．５
８を接続片５４．５４のネジ穴６０．６０へそれぞれ螺
合させることにより取付台５０へ取付けられる。また、
取付台５０には、被保護回路の導線６２．６２がネジ６
４．６４によって接続片５４．５４のネジ穴６６．６６
へそれぞれ接続される。The contact opening/closing mechanism 10 has a through hole 56.5 of the mounting piece 44.46.
Insert the screws 58.58 through 6, respectively, and
8 into the screw holes 60, 60 of the connecting pieces 54, 54, respectively, to attach the connecting pieces 54, 54 to the mounting base 50. Also,
The conductors 62 and 62 of the circuit to be protected are attached to the mounting base 50 by screws 6 and 62.
4.64 screw hole 66.66 of connecting piece 54.54
connected to each.
なお、可動部材１２の構造は、■字状、Ｗ字状、リング
状、うずまき状等に形成してもよいが、コイルばね状が
変位量を大きくできるので最も好ましい。また、可動部
材１２をなす形状記憶合金は、Ｎｉ−Ｔｉ合金、Ｎｉ−
Ｆｅ合金、Ｎｉ−Ｃｕ合金、Ｃｕ−Ｚｎ−Ａｌなどの銅
系合金等を用いる。The structure of the movable member 12 may be formed into a square shape, a W shape, a ring shape, a spiral shape, etc., but a coil spring shape is most preferable because it can increase the amount of displacement. Further, the shape memory alloy forming the movable member 12 is Ni-Ti alloy, Ni-
A copper alloy such as Fe alloy, Ni-Cu alloy, Cu-Zn-Al, etc. is used.
次に、接点開閉機構５０の動作を述べる。Next, the operation of the contact opening/closing mechanism 50 will be described.
接点開閉機構ＩＯを、保護すべきｍｓと直列に配線に接
続する。ここで、落雷、回路短絡等に起因して着脱端子
１６と固定端子２０との間に過電流が流れると、可動部
材１２の有する抵抗値によって温度が上昇し、可動部材
１２を構成する形状記憶合金のマルテンサイト変態温度
を越える。ここで、このマルテンサイト変態温度が例え
ば８０°Ｃであったとすれば、可動部材１２の温度が８
０°Ｃを越えると、形状記憶合金が逆変態して母相に至
り、可動部材１２は記憶された長さに縮小しようとする
。その結果、可動部材１２の復元力が一端１４を着脱端
子１６に接続している挟持力よりも大きいため、一端１
４が着脱端子１６から離脱する。こうして、接点開閉機
構５０は電流を遮断して機器へ過を流が流れることを防
ぐ。The contact switching mechanism IO is connected to the wiring in series with the ms to be protected. Here, when an overcurrent flows between the removable terminal 16 and the fixed terminal 20 due to a lightning strike, a short circuit, etc., the temperature rises due to the resistance value of the movable member 12, and the shape memory forming the movable member 12 Exceeds the martensitic transformation temperature of the alloy. Here, if this martensitic transformation temperature is, for example, 80°C, the temperature of the movable member 12 is 80°C.
When the temperature exceeds 0° C., the shape memory alloy reversely transforms into a matrix, and the movable member 12 attempts to shrink to the memorized length. As a result, since the restoring force of the movable member 12 is greater than the clamping force connecting the end 14 to the removable terminal 16, the one end 14
4 is detached from the detachable terminal 16. Thus, the contact opening/closing mechanism 50 interrupts the current and prevents the current from flowing to the device.
また、接点開閉機構５０は、過電流により記憶された長
さに縮小した可動部材１２が冷えてマルテンサイト相に
至った後、可動部材１２を引き伸ばして変形を加えるこ
とにより再使用できる。すなわち、可動部材１２の一端
１４に接続された挿入部２６の先端２８を指で摘み、可
動部材１２を引き伸ばす。そして、着脱端子１６の受容
部３２の開口端３４に挿入部２６の先端２日をあてがい
、挟持片３日、３８の弾性力に抗して開口端３４を拡開
させ、開口端３４が鍔状基端３０に当接するまで先端２
８を挿入する。こうして、接点開閉機構１０の導通が回
復する。Further, the contact opening/closing mechanism 50 can be reused by stretching and deforming the movable member 12 after the movable member 12, which has been reduced to the memorized length due to overcurrent, cools down and reaches the martensitic phase. That is, the distal end 28 of the insertion portion 26 connected to one end 14 of the movable member 12 is pinched with fingers, and the movable member 12 is stretched. Then, the tip end of the insertion part 26 is applied to the open end 34 of the receiving part 32 of the detachable terminal 16, and the open end 34 is expanded against the elastic force of the clamping piece 38, so that the open end 34 is secured to the flange. The tip 2 until it abuts the proximal end 30.
Insert 8. In this way, conduction of the contact opening/closing mechanism 10 is restored.
なお、この実施例では人間の手によってリセットされる
が、バイアスばねを並設して自動的にリセットされるよ
うにしてもよい。In this embodiment, the reset is done manually, but a bias spring may be provided in parallel to automatically reset.
また、この実施例で使用した可動部材１２は、Ｎｉ−Ｔ
ｉ合金の直径０．３ｍｍの線材を用いて、外径５ｍｍで
５回巻のコイルばねを形成し、５００°Ｃで３０分間の
加熱処理後、急冷することにより形状記憶処理を行った
ものである。この可動部材１２は、マルテンサイト変態
温度が約６０°Ｃ５抵抗値が約ｌΩであった。そして、
この可動部材１２を用いた接点開閉機構ＩＯと５Ωの抵
抗器との直列回路を、５０Ｈｚ、１００ｖの商用電源に
接続したところ、約０．３秒で接点開閉機構１０が動作
し過電流を遮断した。Furthermore, the movable member 12 used in this example was made of Ni-T
A coil spring with an outer diameter of 5 mm and 5 turns is formed using an i-alloy wire rod with a diameter of 0.3 mm, and after heat treatment at 500°C for 30 minutes, it is rapidly cooled to undergo shape memory treatment. be. This movable member 12 had a martensitic transformation temperature of about 60° C. and a resistance value of about 1Ω. and,
When the series circuit of the contact opening/closing mechanism IO using this movable member 12 and a 5Ω resistor is connected to a 50Hz, 100V commercial power source, the contact opening/closing mechanism 10 operates in about 0.3 seconds to cut off the overcurrent. did.
なお、接点開閉機構１０は、可動部材１２の材質、構造
、着脱端子１６の挟持力等によって所望の特性が得られ
る。Note that the contact opening/closing mechanism 10 can obtain desired characteristics depending on the material and structure of the movable member 12, the clamping force of the detachable terminal 16, and the like.
この発明に係る形状記憶合金を用いた接点開閉機構によ
れば、形状記憶合金からなる可動部材を着脱自在に端子
に接続することにより、機械的な接触のみによって接点
を構成できる。その結果、安定した特性を得ることがで
き、簡単な操作で繰り返し使用できる。According to the contact opening/closing mechanism using the shape memory alloy according to the present invention, the movable member made of the shape memory alloy is detachably connected to the terminal, so that the contact can be formed only by mechanical contact. As a result, stable characteristics can be obtained and it can be used repeatedly with simple operations.
また、上記可動部材をコイルばね状にすると変位量を大
きくでき動作を確実にできる。Moreover, if the movable member is formed into a coil spring shape, the amount of displacement can be increased and operation can be ensured.
第１図ないし第３図はこの発明に係る接点開閉機構の一
実施例を示し、第１図は接点開閉機構およびその取付台
を示す斜視図、第２図は接点開閉機構を取付台に取付け
た状態を示す斜視図、第３図は第２図において可動部材
がマルテンサイト変態温度以上になった場合を示す斜視
図、第４図は形状記憶合金を用いた従来の接点開閉機構
を示す構成図である。
ｌＯ・・・接点開閉機構
１２・・・可動部材
１４・・・可動部材の一端
１６・・・着脱端子
１８・・・可動部材の他端
２０・・・固定端子
特許出願人・・・株式会社 白山製作所代 理 人・・
・弁理士 吉１）芳春1 to 3 show an embodiment of the contact opening/closing mechanism according to the present invention, FIG. 1 is a perspective view showing the contact opening/closing mechanism and its mounting base, and FIG. 2 shows the contact opening/closing mechanism mounted on the mounting base. FIG. 3 is a perspective view showing a state in which the movable member in FIG. It is a diagram. lO...Contact opening/closing mechanism 12...Movable member 14...One end of the movable member 16...Detachable terminal 18...Other end of the movable member 20...Fixed terminal Patent applicant...Co., Ltd. Managing Director of Hakusan Seisakusho...
・Patent Attorney Yoshi 1) Yoshiharu
Claims (2)
の一端を着脱自在に接続した着脱端子と、上記可動部材
の他端を固定して接続した固定端子とを備え、上記可動
部材には過電流による自己発熱によって上記着脱端子か
ら離脱する形状が記憶された形状記憶合金を用いた接点
開閉機構。(1) A movable member made of a shape memory alloy, a removable terminal to which one end of the movable member is detachably connected, and a fixed terminal to which the other end of the movable member is fixedly connected; A contact opening/closing mechanism using a shape memory alloy that remembers a shape that separates from the removable terminal due to self-heating caused by overcurrent.
構において、上記可動部材がコイルばね状であり、この
可動部材には過電流による自己発熱によって縮小して上
記着脱端子から離脱する形状が記憶されたことを特徴と
する形状記憶合金を用いた接点開閉機構。(2) In the contact opening/closing mechanism using a shape memory alloy according to claim 1, the movable member has a coil spring shape, and the movable member has a shape that shrinks and separates from the detachable terminal due to self-heating caused by overcurrent. A contact opening/closing mechanism using a shape memory alloy, which is characterized by being memorized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22843890A JPH04112426A (en) | 1990-08-31 | 1990-08-31 | Contact opening and closing mechanism using shape memory alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22843890A JPH04112426A (en) | 1990-08-31 | 1990-08-31 | Contact opening and closing mechanism using shape memory alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04112426A true JPH04112426A (en) | 1992-04-14 |
Family
ID=16876494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22843890A Pending JPH04112426A (en) | 1990-08-31 | 1990-08-31 | Contact opening and closing mechanism using shape memory alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04112426A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120113558A1 (en) * | 2010-11-05 | 2012-05-10 | Gm Global Technology Operations, Inc. | Actuation and protection utilizing active material activation during lightning strikes and similar events |
| US20120169451A1 (en) * | 2010-12-30 | 2012-07-05 | Brian Frederick Mooney | Shape memory alloy actuated circuit breaker |
-
1990
- 1990-08-31 JP JP22843890A patent/JPH04112426A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120113558A1 (en) * | 2010-11-05 | 2012-05-10 | Gm Global Technology Operations, Inc. | Actuation and protection utilizing active material activation during lightning strikes and similar events |
| US8687340B2 (en) * | 2010-11-05 | 2014-04-01 | GM Global Technology Operations LLC | Actuation and protection utilizing active material activation during lightning strikes and similar events |
| US20120169451A1 (en) * | 2010-12-30 | 2012-07-05 | Brian Frederick Mooney | Shape memory alloy actuated circuit breaker |
| US8830026B2 (en) * | 2010-12-30 | 2014-09-09 | General Electric Company | Shape memory alloy actuated circuit breaker |
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