JPH0211967B2 - - Google Patents
Info
- Publication number
- JPH0211967B2 JPH0211967B2 JP20582081A JP20582081A JPH0211967B2 JP H0211967 B2 JPH0211967 B2 JP H0211967B2 JP 20582081 A JP20582081 A JP 20582081A JP 20582081 A JP20582081 A JP 20582081A JP H0211967 B2 JPH0211967 B2 JP H0211967B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- sensitive
- force
- magnetic material
- martensitic transformation
- 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
Links
- 230000009466 transformation Effects 0.000 claims description 56
- 239000000696 magnetic material Substances 0.000 claims description 36
- 229910000734 martensite Inorganic materials 0.000 claims description 33
- 239000002131 composite material Substances 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 16
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 244000145845 chattering Species 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910000828 alnico Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical compound [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Thermally Actuated Switches (AREA)
Description
【発明の詳細な説明】
本発明は、電気回路をオンオフしかつ温度を制
御する感温素子に形状記憶合金を用いかつ瞬発力
ある接点開閉が可能にし温度制御スイツチに関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature control switch that uses a shape memory alloy for a temperature sensing element that turns on and off an electric circuit and controls temperature, and that enables instantaneous opening and closing of contacts.
形状記憶合金は、温度の高い母相の状態で一定
の形態を成形しておき、その後温度を下げてマル
テンサイト変態の状態にして形状を変形し、再び
温度を上げて母相の状態に戻すと、矛め母相で成
形した形状に戻る性質を有する。また形状記憶合
金は、温度の高い母相状態にあるときとマルテン
サイト変態の状態にあるときとでは、同じひずみ
量に対する抗張力の値が母相変態時の場合がマル
テンサイ変態時より約３倍大きい。従つてこれら
の特性を有する形状記憶合金と機械的なばねとを
組合せることにより、ある温度範囲で任意に温度
を制御することができる温度制御スイツチを構成
することができる。 Shape memory alloys are formed into a certain shape in a high-temperature matrix state, then the temperature is lowered to enter a martensitic transformation state, the shape is deformed, and the temperature is raised again to return to the matrix state. It has the property of returning to the shape formed by the spear matrix. In addition, when a shape memory alloy is in a high-temperature matrix state and when it is in a martensitic transformation state, the tensile strength value for the same amount of strain is approximately three times larger in the matrix transformation state than in the martensitic transformation state. . Therefore, by combining a shape memory alloy having these characteristics with a mechanical spring, it is possible to construct a temperature control switch that can arbitrarily control the temperature within a certain temperature range.
一方、形状記憶合金を用いた温度制御スイツチ
は、感温素子に形状記憶合金を１個用いることに
より、構造簡単かつ廉価に提供し得る。しかし形
状記憶合金は母相・マルテンサイト変態の合金組
成と温度との間にはヒステリシス特性を持つてい
るため、結局温度制御スイツチも温度によつてス
イツチ作動の際ヒステリシスを持ち、そのため狭
い温度範囲で使用する温度制御スイツチには不適
といえる。 On the other hand, a temperature control switch using a shape memory alloy can be provided with a simple structure and at a low cost by using one shape memory alloy for the temperature sensing element. However, shape memory alloys have a hysteresis characteristic between the alloy composition of the matrix/martensitic transformation and the temperature, so the temperature control switch also has hysteresis when the switch is operated depending on the temperature, resulting in a narrow temperature range. It can be said that it is unsuitable for temperature control switches used in
本発明はかかる点に鑑み、マルテンサイト変態
から母相変態への変態温度の異なる２つ以上の形
状記憶合金を組合わせることにより、狭い温度制
御範囲が可能であり、かつ感温磁性材料と永久磁
石とを組合せることにより、電気接点にチヤツタ
リングを発生を抑えることができるこの種温度制
御スイツチを提案することを主たる目的とする。 In view of these points, the present invention combines two or more shape memory alloys with different transformation temperatures from martensitic transformation to matrix transformation, thereby making it possible to achieve a narrow temperature control range, and to combine a temperature-sensitive magnetic material with a permanent The main purpose of this invention is to propose a temperature control switch of this type that can suppress the occurrence of chattering at electrical contacts by combining it with a magnet.
以下本発明の一実施例について図面を参照しな
がら詳細に説明する。 An embodiment of the present invention will be described in detail below with reference to the drawings.
第１図は本発明の一例を示す側面図、第２図は
第１図中−線断面図である。また第３図はス
イツチのオフ状態時の側面図である。１は感温素
子を示し、形状記憶合金により形成される。形状
記憶合金は、温度が上昇して母相の組織に戻る
と、母相の状態で予め成形された形状に戻る性質
を有しているため、温度が上昇した母相の状態の
ときに、第３図に示す如く、折曲変形した形状に
成形しておく。従つて形状記憶合金がマルテンサ
イト変態から母相に組織が変化すると、感温素子
１は、第３図に示す如く、元の成形形状に戻るこ
とになる。１′は感温素子１のマルテンサイト変
態温度より高い感温素子を示し、ほぼ同じ形状に
成形される。感温素子１，１′により複合感温素
子を構成しているが、感温素子を３個以上含む構
造とすることができる。 FIG. 1 is a side view showing an example of the present invention, and FIG. 2 is a cross-sectional view taken along the line in FIG. FIG. 3 is a side view of the switch when it is in the OFF state. Reference numeral 1 indicates a temperature sensing element, which is made of a shape memory alloy. Shape memory alloys have the property of returning to the shape previously formed in the matrix state when the temperature rises and returns to the matrix structure. As shown in FIG. 3, it is formed into a bent and deformed shape. Therefore, when the structure of the shape memory alloy changes from martensitic transformation to the parent phase, the temperature sensing element 1 returns to its original molded shape, as shown in FIG. 1' indicates a temperature sensing element whose martensitic transformation temperature is higher than that of temperature sensing element 1, and is molded into almost the same shape. Although the temperature sensing elements 1 and 1' constitute a composite temperature sensing element, the structure may include three or more temperature sensing elements.
２は通常の板ばねより成るばねを示し、設定す
る制御温度の範囲でばね力の変化しない材料が用
いられる。ばね２と絶縁体６を介して設けた基台
３との間に複合感温素子１，１′が並列して挾持
されている。そしてばね２のばね力を微調整する
ため、ばね２に対して力を及ぼす補助ばね４が設
けられ、調整ねじ５の回動によつてばね２及び補
助ばね４の合成力を微調整し得るように構成され
ている。ばね２と基台３とには相対向して電気接
点９ａ，９ｂが設けられ、接点９ａ，９ｂに接続
したリード線１０により電気回路に接続されるこ
とになる。尚、基台３は、温度による変形又は感
温素子の偏倚力によりたわみを生ずるものなけれ
ばよく、金属製又は合成樹脂製でもよい。 Reference numeral 2 indicates a spring made of a normal leaf spring, which is made of a material whose spring force does not change within the set control temperature range. Composite temperature sensing elements 1 and 1' are sandwiched in parallel between a spring 2 and a base 3 provided with an insulator 6 in between. In order to finely adjust the spring force of the spring 2, an auxiliary spring 4 that exerts a force on the spring 2 is provided, and the combined force of the spring 2 and the auxiliary spring 4 can be finely adjusted by rotating the adjustment screw 5. It is configured as follows. Electric contacts 9a and 9b are provided on the spring 2 and the base 3 to face each other, and are connected to an electric circuit by a lead wire 10 connected to the contacts 9a and 9b. The base 3 may be made of metal or synthetic resin as long as it does not bend due to deformation due to temperature or biasing force of the temperature sensing element.
ばね２と基台３とには相対向して感温磁性材７
及び永久磁石８が設けられる。そして感温磁性材
７の磁気変態点を任意に設定することにより、感
温素子とばねとの作用に加えて温度ヒステリシス
を任意に設定することができる。尚詳細は後述す
る。 The spring 2 and the base 3 are provided with a temperature-sensitive magnetic material 7 facing each other.
and a permanent magnet 8 are provided. By arbitrarily setting the magnetic transformation point of the temperature-sensitive magnetic material 7, it is possible to arbitrarily set the temperature hysteresis in addition to the action of the temperature-sensing element and the spring. The details will be described later.
第４図は複合感温素子１，１′の温度と応力と
の関係を示す特性曲線図である。この関係は第１
図に示した感温素子１，１′の配列に相当する。
そして感温素子１′のマルテンサイト変態温度は
感温素子１のそれより高く設定されていること上
述した通りであるが、更に温度ヒステリシスを小
に設定するため、感温素子１の母相変態終了温度
Ｂ点と感温素子１′のマルテンサイト変態終了温
度Ａ点とをほぼ同じになる感温素子を選択する。
そして機械的なばね２，４による合成ばね力は、
複合感温素子１，１′の合成した偏倚力の中点f1
となるように調整ねじ５により調整する。更に感
温磁性材７の磁気変態点は、感温素子１の母相変
態終了温度Ｂ点より僅かに高い温度のものとして
おく。 FIG. 4 is a characteristic curve diagram showing the relationship between temperature and stress of the composite temperature sensing elements 1, 1'. This relationship is the first
This corresponds to the arrangement of temperature sensing elements 1 and 1' shown in the figure.
As mentioned above, the martensitic transformation temperature of temperature sensing element 1' is set higher than that of temperature sensing element 1, but in order to further set the temperature hysteresis to a small value, A temperature sensing element is selected in which the end temperature B point is almost the same as the martensitic transformation end temperature point A of the temperature sensing element 1'.
And the combined spring force due to mechanical springs 2 and 4 is:
Midpoint f 1 of the combined biasing force of composite temperature sensing elements 1 and 1'
Adjust with the adjusting screw 5 so that Further, the magnetic transformation point of the temperature-sensitive magnetic material 7 is set to be slightly higher than the parent phase transformation end temperature point B of the temperature-sensitive element 1.
今、複合感温素子１，１′の温度が高く、共に
母相変態の状態にある温度t1のときは、第４図に
示す如く、複合感温素子１，１′の合成偏倚力は、
抗張力がマルテンサイト変態時の約３倍と大きい
ため、ばね２，４の合成力に抗して各感温素子
１，１′が、第３図に示す如く、上方へ反つて各
接点９ａ，９ｂを開放している。 Now, when the temperature of the composite temperature sensing elements 1 and 1' is high and the temperature is t 1 where both are in the state of matrix transformation, the combined biasing force of the composite temperature sensing elements 1 and 1' is as shown in FIG. ,
Since the tensile strength is about three times as large as that of martensitic transformation, each temperature sensing element 1, 1' bends upward against the combined force of springs 2, 4, as shown in FIG. 9b is open.
次に温度が下つてくると、複合感温素子１，
１′は、第４図に示す曲線に沿つて変化し、それ
に伴つて応力も低下する。但し、感温素子１′の
マルテンサイト変態開始温度Ｃ点では、感温磁性
材７の磁気変態点より高くなつており、感温磁性
材７と永久磁石８との吸引はない。 Next, when the temperature drops, the composite temperature sensing element 1,
1' changes along the curve shown in FIG. 4, and the stress also decreases accordingly. However, the martensitic transformation start temperature point C of the temperature-sensitive element 1' is higher than the magnetic transformation point of the temperature-sensitive magnetic material 7, and there is no attraction between the temperature-sensitive magnetic material 7 and the permanent magnet 8.
感温素子１′のマルテンサイト変態終了温度Ａ
点近くになると、感温素子１′の抗張力が減少し
て各接点９ａ，９ｂが接触し始めるが、このとき
感温磁性材７の磁気変態点より僅かに低い温度に
至ると感温磁性材７と永久磁石８とは急速に吸引
し合うので、接点９ａ，９ｂの閉状態となる。感
温素子１，１′の合成偏倚力とばね２，４の合成
力とが平衡していても感温磁性材７と永久磁石８
との吸引力が存在するため、接点の急速な閉塞が
生ずるのである。 Martensitic transformation end temperature A of temperature sensing element 1'
As the temperature approaches the point, the tensile strength of the temperature-sensitive element 1' decreases and the contacts 9a and 9b begin to come into contact with each other. Since the permanent magnet 7 and the permanent magnet 8 rapidly attract each other, the contacts 9a and 9b become closed. Even if the composite biasing force of the temperature-sensitive elements 1, 1' and the composite force of the springs 2, 4 are balanced, the temperature-sensitive magnetic material 7 and the permanent magnet 8
Rapid occlusion of the contacts occurs due to the presence of attraction forces.
逆に温度が上ると、感温素子１の曲線に沿つて
変化し、感温素子１の母相変態終了温度Ｂ点に近
づくと、複合感温素子１，１′の合成偏倚力とば
ね２，４の合成力とは平衡することになるが、感
温磁性材７の磁気変態点がＢ点より僅かに高く設
定しているため、感温磁性材７と永久磁石８との
吸引力により、接点９ａ，９ｂは閉じたままであ
る。感温磁性材７の磁気変態点を超えて温度が高
くなると、感温磁性材７の吸引力が消失するた
め、既に感温素子１，１の合成偏倚力がばね２，
４の合成力より大きいため、接点９ａ，９ｂは急
速に開放することになる。従つて、接点９ａ，９
ｂ間に大きい電流容量を印加してもチヤツタリン
グ現象による接点の消耗を防ぐことができる。こ
のようにして制御温度幅（温度ヒステリシス）の
極めて小さい温度制御スイツチを構成することが
できる。 Conversely, when the temperature rises, the temperature changes along the curve of the temperature sensing element 1, and as it approaches point B, the temperature at which the parent phase transformation of the temperature sensing element 1 ends, the combined biasing force of the composite temperature sensing elements 1, 1' and the spring 2 change. , 4, but since the magnetic transformation point of the temperature-sensitive magnetic material 7 is set slightly higher than point B, the attractive force between the temperature-sensitive magnetic material 7 and the permanent magnet 8 causes , contacts 9a and 9b remain closed. When the temperature rises above the magnetic transformation point of the temperature-sensitive magnetic material 7, the attractive force of the temperature-sensitive magnetic material 7 disappears, so that the combined biasing force of the temperature-sensitive elements 1, 1 has already increased to the spring 2,
4, the contacts 9a and 9b will open rapidly. Therefore, the contacts 9a, 9
Even if a large current capacity is applied between the terminals b, it is possible to prevent the contacts from being worn out due to the chattering phenomenon. In this way, a temperature control switch with an extremely small control temperature width (temperature hysteresis) can be constructed.
第５図は本発明の他の例を示す複合感温素子の
温度・応力特性曲線図である。本例においては、
マルテンサイト変態温度の低い感温素子１のマル
テンサイト変態終了温度Ｄ点における抗張力とば
ね２，４の合成力とを平衡させると共に、マルテ
ンサイト変態温度の高い感温素子１′の母相変態
終了温度Ｅ点と感温磁性材７の磁気変態点とを一
致せしめる構成としている。 FIG. 5 is a temperature/stress characteristic curve diagram of a composite thermosensitive element showing another example of the present invention. In this example,
The tensile strength at the martensitic transformation end temperature point D of the temperature sensing element 1 with a low martensitic transformation temperature is balanced with the combined force of the springs 2 and 4, and the matrix transformation of the temperature sensing element 1' with a high martensitic transformation temperature is completed. The structure is such that the temperature point E and the magnetic transformation point of the temperature-sensitive magnetic material 7 are made to coincide.
このような構成によると、第５図において各感
温素子１，１′が共に母相変態の状態にある温度
t5から温度が下つて感温磁性材７の磁気変態点Ｅ
より低くなつても、感温素子１，１′の合成偏倚
力がばね２，４の合成力及び感温磁性材７と永久
磁石８との吸引力より大に設定されているので、
接点９ａ，９ｂの閉塞は生じない。感温磁性材７
は、永久磁石との間隔が大きいときは磁性を有し
ていても永久磁石８を吸引する力が生じないため
である。 According to such a configuration, the temperature at which both the temperature sensing elements 1 and 1' are in the matrix transformation state in FIG.
The temperature decreases from t5 to the magnetic transformation point E of the temperature-sensitive magnetic material 7.
Even if it becomes lower, the combined biasing force of the temperature sensing elements 1 and 1' is set to be larger than the combined force of the springs 2 and 4 and the attractive force between the temperature sensitive magnetic material 7 and the permanent magnet 8.
No blockage of the contacts 9a, 9b occurs. Temperature-sensitive magnetic material 7
This is because when the distance from the permanent magnet 8 is large, no force is generated to attract the permanent magnet 8 even if it has magnetism.
温度が更に低下して感温素子１のマルテンサイ
ト変態終了温度Ｄ点に至ると、感温素子１の抗張
力が弱化するため、接点９ａ，９ｂ間は狭くな
り、かつ感温磁性材７の永久磁石８に対する吸引
力により、接点９ａ，９ｂはばね２，４の合成力
に基いて急速に接触して閉塞することになる。 When the temperature further decreases to point D, the temperature at which the martensitic transformation of the temperature-sensitive element 1 ends, the tensile strength of the temperature-sensitive element 1 weakens, and the distance between the contacts 9a and 9b becomes narrower, and the temperature-sensitive magnetic material 7 permanently Due to the attractive force on the magnet 8, the contacts 9a and 9b rapidly come into contact and close based on the combined force of the springs 2 and 4.
更にこの温度から上昇するときは、感温磁性材
７と永久磁石８との吸引力がＥ点まで持続してい
るため、温度Ｄ点を上昇して複合感温素子１，
１′の合成偏倚力がばね２，４の合成力に勝つて
も、接点９ａ，９ｂは開放されない。温度Ｅ点を
超えると、感温磁性材７の永久磁石８に対する吸
引力が消失して急速に接点９ａ，９ｂが開放され
ることになる。このようにして制御温度幅の大き
い温度制御スイツチを構成することができる。 When the temperature further rises from this temperature, since the attractive force between the temperature-sensitive magnetic material 7 and the permanent magnet 8 continues up to point E, the temperature rises to point D and the composite temperature-sensitive element 1,
Even if the combined biasing force of spring 1' overcomes the combined force of springs 2 and 4, contacts 9a and 9b will not open. When the temperature exceeds point E, the attractive force of the temperature-sensitive magnetic material 7 to the permanent magnet 8 disappears, and the contacts 9a and 9b are rapidly opened. In this way, a temperature control switch with a wide control temperature range can be constructed.
尚、感温磁性材と永久磁石との個有抵抗が低い
ときは、磁気回路上に、接点の電気回路が短絡し
ないように絶縁層を設ける必要がある。また感温
磁性材は、フエライト・金属磁性材料を用いるこ
とができ、永久磁石はバリウムフエライト系・ア
ルニコ・希土類系のいずれも用いることができ
る。 Incidentally, when the individual resistance between the temperature-sensitive magnetic material and the permanent magnet is low, it is necessary to provide an insulating layer on the magnetic circuit so that the electric circuit of the contact point does not short-circuit. Further, as the temperature-sensitive magnetic material, ferrite or metal magnetic materials can be used, and as the permanent magnet, any of barium ferrite, alnico, and rare earth materials can be used.
第６図は本発明の更に他の例を示す側面図であ
る。本例においては、第１図例が感温磁性材７と
永久磁石８とを接点８ａ，８ｂと複合感温素子
１，１′との間に設けたのに対し、感温磁性材７
と永久磁石８との対をばね２及び基台３の作用端
に設けたものである。接点９ａ，９ｂは感温磁性
材７及び永久磁石８と複合感温素子１，１′との
間に存在することになる。 FIG. 6 is a side view showing still another example of the present invention. In this example, the temperature-sensitive magnetic material 7 and the permanent magnet 8 are provided between the contacts 8a, 8b and the composite temperature-sensitive elements 1, 1' in the example of FIG.
and a permanent magnet 8 are provided at the active ends of the spring 2 and the base 3. The contacts 9a, 9b are present between the temperature-sensitive magnetic material 7, the permanent magnet 8, and the composite temperature-sensitive elements 1, 1'.
以上述べた如く本発明によれば、マルテンサイ
ト変態温度の異なる複数の形状記憶合金より成る
感温素子と、複数の感温素子の合成偏倚力に対抗
するばね手段とより成り、ばね手段のばね力は上
記合成偏倚力の中間値に設定し、複数の感温素子
はその一方の母相変態終了温度と他方のマルテン
サイト変態終了温度とが近接する組式とし、該感
温素子に磁石又は感温磁性体を設けて可動接点側
とし、感温素子のマルテンサイト変態時に上記磁
石又は感温磁性体と固定した感温磁性体又は磁石
とが吸引されるように構成し、磁気吸引力は複数
の感温素子の母相変態時の変位力より小にマルテ
ンサイト変態時の変位力より大に設定したので、
接点の開放設定温度に達したときに瞬発的な接
点開放が可能となり、かつ狭い温度範囲の設定が
可能なこの種温度制御スイツチを提供し得る。 As described above, according to the present invention, the temperature sensing element is composed of a plurality of shape memory alloys having different martensitic transformation temperatures, and a spring means for resisting the combined biasing force of the plurality of temperature sensing elements. The force is set to an intermediate value of the above-mentioned combined biasing force, and the plurality of temperature sensing elements are assembled in such a manner that the mother phase transformation end temperature of one of them is close to the martensitic transformation end temperature of the other, and a magnet or a magnet is attached to the temperature sensing element. A temperature-sensitive magnetic material is provided on the movable contact side, and the magnet or temperature-sensitive magnetic material is configured to be attracted to the fixed temperature-sensitive magnetic material or magnet when the temperature-sensitive element undergoes martensitic transformation, and the magnetic attraction force is Since the displacement force is set to be smaller than the displacement force during matrix transformation of multiple temperature sensing elements and larger than the displacement force during martensitic transformation, the contact can be opened instantaneously when the contact opening setting temperature is reached, and It is possible to provide a temperature control switch of this type that allows setting of a narrow temperature range.
また本発明によれば、マルテンサイト変態温度
の異なる複数の形状記憶合金より成る感温素子
と、複数の感温素子の合成偏倚力に対抗するばね
手段とより成り、ばね手段のばね力は上記合成偏
倚力の中間値に設定し、複数の感温素子はその一
方の母相変態終了温度と他方のマルテンサイト変
態終了温度とが離間する組成とし、該感温素子に
磁石又は感温磁性体を設けて可動接点側とし、感
温素子のマルテンサイト変態時に上記磁石又は感
温磁性体と固定した感温磁性体又は磁石とが吸引
されるように構成し、磁気吸引力は複数の感温素
子の母相変態時の変位力より小にマルテンサイト
変態時の変位力より大に設定したので、
接点の開放設定温度に達したときに瞬発的な接
点開放が可能となり、かつ広い温度範囲の設定が
可能なこの種温度制御スイツチを提供し得る。し
たがつて、任意の温度ヒステリシス特性を持つ温
度制御スイツチを得ることができるのは勿論、電
気接点の開閉時に生ずるチヤツタリングを未然に
防止することができるため、電流容量の大きい回
路に接続することができ、接点の寿命を延ばすこ
ともできる。 Further, according to the present invention, the temperature sensing element is made of a plurality of shape memory alloys having different martensitic transformation temperatures, and the spring means counteracts the combined biasing force of the plurality of temperature sensing elements, and the spring force of the spring means is as described above. The composite biasing force is set to an intermediate value, and the plural temperature sensing elements have a composition such that the parent phase transformation end temperature of one of them is separated from the martensitic transformation end temperature of the other, and the temperature sensing element is equipped with a magnet or a temperature sensitive magnetic material. is provided on the movable contact side, and the magnet or temperature-sensitive magnetic material is attracted to the fixed temperature-sensitive magnetic material or magnet when the temperature-sensitive element undergoes martensitic transformation, and the magnetic attraction force is applied to the plural temperature-sensitive elements. Since the displacement force is set to be smaller than the displacement force during matrix transformation of the element and larger than the displacement force during martensitic transformation, the contact can be opened instantaneously when the contact opening setting temperature is reached, and it can be used over a wide temperature range. A configurable temperature control switch of this type can be provided. Therefore, not only can a temperature control switch with arbitrary temperature hysteresis characteristics be obtained, but also chattering that occurs when opening and closing electrical contacts can be prevented, making it possible to connect to a circuit with a large current capacity. This can also extend the life of the contacts.
第１図は本発明の一例を示す側面図、第２図は
第１図中−線断面図、第３図は接点開放状態
を示す側面図、第４図は複合感温素子の温度・応
力特性曲線の一例を示す図、第５図は温度・応力
特性曲線の他の例を示す図、第６図は本発明の他
の例を示す側面図である。
１，１′……複合感温素子、２，４……ばね、
５……調整ねじ、７……感温磁性材、８……永久
磁石。
Fig. 1 is a side view showing an example of the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, Fig. 3 is a side view showing the contact in an open state, and Fig. 4 is a temperature/stress of the composite temperature sensing element. FIG. 5 is a diagram showing an example of the characteristic curve, FIG. 5 is a diagram showing another example of the temperature/stress characteristic curve, and FIG. 6 is a side view showing another example of the present invention. 1, 1'... Composite temperature sensing element, 2, 4... Spring,
5... Adjustment screw, 7... Temperature-sensitive magnetic material, 8... Permanent magnet.
Claims (1)
記憶合金より成る感温素子と、複数の感温素子の
合成偏倚力に対抗するばね手段とより成り、ばね
手段のばね力は上記合成偏倚力の中間値に設定
し、複数の感温素子はその一方の母相変態終了温
度と他方のマルテンサイト変態終了温度とが近接
する組成とし、該感温素子に磁石又は感温磁性体
を設けて可動接点側とし、感温素子のマルテンサ
イト変態時に上記磁石又は感温磁性体と固定した
感温磁性体又は磁石とが吸引されるように構成
し、磁気吸引力は複数の感温素子の母相変態時の
変位力より小にマルテンサイト変態時の変位力よ
り大に設定したことを特徴とする温度制御スイツ
チ。 ２ マルテンサイト変態温度の異なる複数の形状
記憶合金より成る感温素子と、複数の感温素子の
合成偏倚力に対抗するばね手段とより成り、ばね
手段のばね力は上記合成偏倚力の中間値に設定
し、複数の感温素子はその一方の母相変態終了温
度と他方のマルテンサイト変態終了温度とが離間
する組成とし、該感温素子に磁石又は感温磁性体
を設けて可動接点側とし、感温素子のマルテンサ
イト変態時に上記磁石又は感温磁性体と固定した
感温磁性体又は磁石とが吸引されるように構成
し、磁気吸引力は複数の感温素子の母相変態時の
変位力より小にマルテンサイト変態時の変位力よ
り大に設定したことを特徴とする温度制御スイツ
チ。[Claims] 1. Consists of a temperature sensing element made of a plurality of shape memory alloys having different martensitic transformation temperatures, and a spring means for opposing the combined biasing force of the plurality of temperature sensing elements, the spring force of the spring means being The composite biasing force is set to an intermediate value, and the plurality of temperature sensing elements have a composition in which the mother phase transformation end temperature of one of them is close to the martensitic transformation end temperature of the other, and the temperature sensing element is provided with a magnet or a temperature sensitive magnetic material. is provided on the movable contact side, and the magnet or temperature-sensitive magnetic material is attracted to the fixed temperature-sensitive magnetic material or magnet when the temperature-sensitive element undergoes martensitic transformation, and the magnetic attraction force is applied to the plural temperature-sensitive elements. A temperature control switch characterized in that the displacement force is set to be smaller than the displacement force at the time of matrix transformation of the element and greater than the displacement force at the time of martensitic transformation. 2 Consists of a temperature-sensitive element made of a plurality of shape memory alloys having different martensitic transformation temperatures, and a spring means that counters the combined biasing force of the plurality of temperature-sensitive elements, and the spring force of the spring means is an intermediate value of the above-mentioned combined biasing force. , and the plurality of temperature sensing elements have a composition in which the mother phase transformation end temperature of one and the martensitic transformation end temperature of the other are separated, and the temperature sensing elements are provided with a magnet or a temperature sensitive magnetic material to connect the movable contact side. The magnet or temperature-sensitive magnetic material is attracted to the fixed temperature-sensitive magnetic material or magnet when the temperature-sensitive element undergoes martensitic transformation, and the magnetic attraction force is applied during the matrix transformation of the plurality of temperature-sensitive elements. A temperature control switch characterized in that the displacement force is set to be smaller than the displacement force during martensitic transformation and larger than the displacement force during martensitic transformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20582081A JPS58106725A (en) | 1981-12-19 | 1981-12-19 | temperature control switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20582081A JPS58106725A (en) | 1981-12-19 | 1981-12-19 | temperature control switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58106725A JPS58106725A (en) | 1983-06-25 |
| JPH0211967B2 true JPH0211967B2 (en) | 1990-03-16 |
Family
ID=16513237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20582081A Granted JPS58106725A (en) | 1981-12-19 | 1981-12-19 | temperature control switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58106725A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0232637U (en) * | 1988-08-25 | 1990-02-28 |
-
1981
- 1981-12-19 JP JP20582081A patent/JPS58106725A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58106725A (en) | 1983-06-25 |
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