JPH06295651A - Thermally-actuated switch and manufacture thereof - Google Patents
Thermally-actuated switch and manufacture thereofInfo
- Publication number
- JPH06295651A JPH06295651A JP10747793A JP10747793A JPH06295651A JP H06295651 A JPH06295651 A JP H06295651A JP 10747793 A JP10747793 A JP 10747793A JP 10747793 A JP10747793 A JP 10747793A JP H06295651 A JPH06295651 A JP H06295651A
- Authority
- JP
- Japan
- Prior art keywords
- fixed
- contact
- fixed contact
- plate
- heat
- 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.)
- Granted
Links
Landscapes
- Thermally Actuated Switches (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、バイメタルなど温度変
化に応動して変形する熱応動板を利用しその運動を接点
の開閉に利用した熱応動開閉器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-actuated switch which utilizes a heat-actuated plate which is deformed in response to a temperature change such as a bimetal and uses its motion to open and close contacts.
【０００２】[0002]
【従来の技術】従来の熱応動開閉器としては例えば特開
平５−３６３３５に示されたようなものがある。この熱
応動開閉器について図１１（Ａ）及び（Ｂ）を参照して
説明すると、この熱応動開閉器１０１は、例えば密閉形
電動圧縮機などに使われる周知の電動機の保護用に使わ
れるものであり、鉄などの導電性の金属板２に穿たれた
孔に導電端子ピン３をガラスの様な電気絶縁性の充填材
４によって気密に貫通固定した蓋板５と金属製のハウジ
ング６の開口部とをリングプロジェクション溶接などに
より気密に固着することによって耐圧力性を有する気密
容器が構成されている。導電端子ピン３の容器内部側端
部には鉄の様に強度を有する金属製の固定接点支持体７
の一端が固着されており、その固定接点支持体７の他端
には銀や銀合金の固定接点８が固着されている。2. Description of the Related Art As a conventional heat responsive switch, for example, there is one disclosed in Japanese Patent Laid-Open No. 5-36335. The heat-actuated switch will be described with reference to FIGS. 11A and 11B. The heat-actuated switch 101 is used to protect a known electric motor used in, for example, a hermetic electric compressor. In addition, the cover plate 5 and the metal housing 6 are formed by hermetically fixing the conductive terminal pins 3 through the holes formed in the conductive metal plate 2 such as iron with the electrically insulating filler 4 such as glass. An airtight container having pressure resistance is configured by airtightly fixing the opening and the opening by ring projection welding or the like. At the end of the conductive terminal pin 3 on the inner side of the container, a fixed contact support 7 made of metal having strength such as iron.
One end of the fixed contact 8 is fixed, and the fixed contact 8 made of silver or silver alloy is fixed to the other end of the fixed contact support 7.
【０００３】ハウジング６の内面には皿状に絞り加工さ
れたバイメタルの様な熱応動板９の一端が熱応動板支持
体１０を介して導電的に固着されている。熱応動板９の
他端には固定接点と同様の可動接点１１を固着し、この
可動接点１１は前記固定接点８と接触・開離可能に配置
されている。On the inner surface of the housing 6, one end of a heat responsive plate 9 such as a bimetal drawn in a dish shape is conductively fixed via a heat responsive plate supporter 10. A movable contact 11 similar to a fixed contact is fixed to the other end of the heat responsive plate 9, and the movable contact 11 is arranged so as to be able to come into contact with and separate from the fixed contact 8.
【０００４】この熱応動開閉器１０１の動作について説
明すると、所定の第１の温度に達するまでは熱応動板９
は図１１（Ａ）に実線で示すように可動接点１１と固定
接点８を接触させる方向に湾曲しており、この時導電端
子ピン３−固定接点支持体７−固定接点８−可動接点１
１−熱応動板９−熱応動板支持体１０−ハウジング６の
経路で電路が構成されている。熱応動開閉器１０１の周
囲の雰囲気温度が上昇したり内部に流れる電流値が上昇
することにより熱応動板の温度が前記第１の温度に達す
ると、熱応動板９は急激にその湾曲方向を図１１（Ａ）
に点線で示すように反転することにより可動接点１１と
固定接点８を開離し、電路を確実に遮断する。The operation of the heat-actuated switch 101 will be described. The heat-actuated plate 9 is operated until a predetermined first temperature is reached.
11A is curved in a direction in which the movable contact 11 and the fixed contact 8 are brought into contact with each other, as indicated by a solid line in FIG. 11A. At this time, the conductive terminal pin 3-fixed contact support 7-fixed contact 8-movable contact 1
An electric path is constituted by a path of 1-thermo-responsive plate 9-thermo-responsive plate support 10-housing 6. When the temperature of the heat responsive plate reaches the first temperature due to an increase in the ambient temperature around the heat responsive switch 101 or an increase in the value of the current flowing inside, the heat responsive plate 9 rapidly changes its bending direction. FIG. 11 (A)
By reversing as shown by the dotted line, the movable contact 11 and the fixed contact 8 are separated, and the electric path is surely cut off.
【０００５】また反転した熱応動板９は所定の第２の温
度にまでその温度が下がると急跳復帰してその湾曲方向
を初期の方向に戻し可動接点１１と固定接点８を接触さ
せることにより電路を復帰させる。When the temperature of the inverted heat responsive plate 9 drops to a predetermined second temperature, the heat responsive plate 9 suddenly recovers to return its bending direction to the initial direction and bring the movable contact 11 and the fixed contact 8 into contact with each other. Restore the circuit.
【０００６】[0006]
【発明が解決しようとする課題】この様な熱応動開閉器
においては、動作温度の較正をハウジング６の較正部６
Ａを変形させて熱応動板支持体１０の根元を変位させる
ことにより、挺子の原理により可動接点１１と固定接点
８との接点圧を較正することにより行っている。In such a thermal switch, the operating temperature is calibrated by the calibration section 6 of the housing 6.
By deforming A to displace the root of the heat responsive plate support 10, the contact pressure between the movable contact 11 and the fixed contact 8 is calibrated by the principle of the lever.
【０００７】そのため接点の溶接において図１２（Ａ）
の如き理想的な溶接状態における接点高さｈ0に対し
て、その溶接状態により図１２（Ｂ）及び（Ｃ）の如く
溶接部分の潰れ量にばらつきや接点の傾きがでると、接
点の高さｈが基準値ｈ0に対してｈ1またはｈ2で示す如
く変わってしまうため、製品毎に組付後の接点間の初期
の接触圧にばらつきが生ずる。そのため温度較正時のハ
ウジング６の較正部６Ａの変形量が揃わず較正作業が難
しくなるという問題があった。また特に本実施例の様に
密閉容器を構成した後に容器の一部を変形して動作温度
の構成を行なうものにおいては、接点高さの異常を見逃
すと動作温度構成前の接点間の接触圧が高すぎたり低す
ぎたりする事により、密閉容器構成後に温度較正不可能
になることがあった。さらに接点の高さの違いにより、
開放時の接点間距離にばらつきが生じ接点間の耐電圧値
が揃わないという問題があった。Therefore, in welding the contacts, FIG.
As shown in FIGS. 12B and 12C, when the contact height h 0 in the ideal welding state such as that shown in FIG. Since the height h changes as indicated by h 1 or h 2 with respect to the reference value h 0 , the initial contact pressure between the assembled contacts varies for each product. Therefore, there is a problem that the calibration work is difficult because the deformation amount of the calibration portion 6A of the housing 6 is not uniform during temperature calibration. Further, in particular, in the case where the operating temperature is configured by deforming a part of the container after constructing the closed container as in the present embodiment, if the abnormality of the contact height is overlooked, the contact pressure between the contacts before the operating temperature is configured. If the temperature was too high or too low, the temperature could not be calibrated after the closed container was constructed. Furthermore, due to the difference in contact height,
There is a problem that the distance between the contacts when opening is varied and the withstand voltage values between the contacts are not uniform.
【０００８】また従来は固定接点、可動接点共に接触面
が比較的曲率の大きな球面形の接点を使用している為
に、組付時の誤差により温度較正前における両接点の位
置関係が前後左右に僅かにずれても接点間の初期の接触
圧や、開放後の接点間距離に可成り影響が大きいばらつ
きが生ずる。Further, conventionally, since the fixed contact and the movable contact both have spherical contact surfaces with relatively large curvatures, the positional relationship between both contacts before and after temperature calibration may be different due to an error during assembly. Even with a slight deviation, the initial contact pressure between the contacts and the distance between the contacts after opening will vary considerably.
【０００９】また例えば固定接点に平面型の接点を使用
した場合には可動接点と固定接点との部品としての共通
性がなくなるうえ、溶接時の条件の違いや接点の傾きに
より溶接後の接点高さを揃える事はできなかった。Further, for example, when a flat contact is used as the fixed contact, the movable contact and the fixed contact have no commonality as parts, and the contact height after welding is different due to the difference in welding conditions and the inclination of the contact. It was not possible to arrange the same.
【００１０】[0010]
【課題を解決するための手段】本発明の熱応動開閉器の
製造方法は、導電性の金属板に穿たれた孔に導電端子を
電気絶縁性の充填材により気密に貫通固定した蓋板と、
金属製のハウジングを有し、該ハウジングの開口端面を
前記蓋板に固着する事により気密容器を構成し、該気密
容器内部には所定の第１の温度で湾曲方向を急跳反転し
第２の温度で急跳復帰するよう予め設定された導電性の
熱応動板を有し、該熱応動板の一端は前記ハウジング又
は導電端子の一方に電気的に接続されるとともに、熱応
動板の他端には可動接点が固着され、該可動接点が前記
導電端子又はハウジングに電気的に接続された固定接点
と接離可能にされ導電端子とハウジングとの間の電路を
開閉可能にされた熱応動開閉器において、固定接点を固
定接点支持体に溶着した後に固定接点の少なくとも可動
接点と接触する部分を塑性変形加工により固定接点支持
体の所定部分からの固定接点の高さを所定の値とすると
ともに、その接触面を所定の形状にする事を特徴とす
る。SUMMARY OF THE INVENTION A method of manufacturing a heat-actuated switch according to the present invention comprises a cover plate in which a conductive terminal is airtightly fixed through a hole formed in a conductive metal plate by an electrically insulating filler. ,
An airtight container is configured by having a metal housing and fixing an opening end surface of the housing to the lid plate. Inside the airtight container, the bending direction is suddenly reversed at a predetermined first temperature to form a second Has a conductive heat-responsive plate that is preset so as to make a sudden return at the temperature of, and one end of the heat-responsive plate is electrically connected to one of the housing or the conductive terminal and the other of the heat-responsive plate. A movable contact is fixed to the end, and the movable contact can be brought into contact with and separated from the fixed contact electrically connected to the conductive terminal or the housing so that the electric path between the conductive terminal and the housing can be opened and closed. In the switch, after the fixed contact is welded to the fixed contact support, at least a portion of the fixed contact that comes into contact with the movable contact is subjected to plastic deformation processing to set the height of the fixed contact from a predetermined portion of the fixed contact support to a predetermined value. With that contact The characterized in that it into a predetermined shape.
【００１１】また本発明の熱応動開閉器は導電性の金属
板に穿たれた１個または複数の孔のそれぞれに導電端子
を電気絶縁性の充填材により気密に貫通固定した蓋板
と、金属製のハウジングを有し、該ハウジングの開口端
面を前記蓋板に固着する事により気密容器を構成し、導
電端子の容器内部側には前記金属板とほぼ平行に配設さ
れた固定接点支持体の一端が導電的に接続固定されると
ともに固定接点支持体の他端には固定接点が固着され、
該固定接点支持体と金属板との間にはセラミックの如き
電気絶縁性のスペーサーが配設されるとともに固定接点
支持体の固定接点固着側の背面が当接するようにされ、
前記ハウジングの内面には所定の第１の温度で湾曲方向
を急跳反転し第２の温度で急跳復帰するよう予め設定さ
れた導電性の熱応動板の一端が電気的に接続されるとと
もに、該熱応動板の他端には前記固定接点と対応し接離
可能にされた可動接点が固着され、導電端子とハウジン
グとの間の電路を開閉可能にされた熱応動開閉器におい
て、固定接点支持体の背面が常にスペーサーとの当接部
を押さえつけるように偏倚力を与えるように構成され固
定接点の位置を常に一定に保つようにされた事を特徴と
する。The heat-actuated switch according to the present invention further includes a lid plate in which conductive terminals are hermetically fixed through one or more holes formed in a conductive metal plate with an electrically insulative filling material, and a metal. Fixed contact support having a housing made of metal and forming an airtight container by fixing the opening end surface of the housing to the lid plate, and arranged inside the container of the conductive terminal substantially parallel to the metal plate. One end of is electrically conductively connected and fixed, and a fixed contact is fixed to the other end of the fixed contact support,
An electrically insulating spacer such as ceramic is disposed between the fixed contact support and the metal plate, and the back surface of the fixed contact support on the fixed contact fixing side is in contact with the spacer.
One end of an electrically conductive heat responsive plate that is preset so as to suddenly reverse the bending direction at a predetermined first temperature and suddenly recover at a second temperature is electrically connected to the inner surface of the housing. , A thermoresponsive switch fixed to the other end of the thermoresponsive plate, the movable contact corresponding to the fixed contact being separable, and capable of opening and closing the electric path between the conductive terminal and the housing. It is characterized in that the back surface of the contact support is configured to give a biasing force so as to always press the contact portion with the spacer, and the position of the fixed contact is always kept constant.
【００１２】また本発明の他の熱応動開閉器は固定接点
支持体とスペーサーとが固定接点支持体の先端部近傍で
のみ当接し、それ以外の部分には熱的絶縁の為の間隙を
設けた事を特徴とする。Further, in another thermally actuated switch according to the present invention, the fixed contact support and the spacer contact only in the vicinity of the tip of the fixed contact support, and a gap for thermal insulation is provided in the other parts. It is characterized by
【００１３】[0013]
【実施例】以下、本発明の実施例について図を参照しな
がら説明する。図１の熱応動開閉器１は本発明の熱応動
開閉器であり、前述の従来例と同じ部品には同じ記号を
付しその説明を省略する。この熱応動開閉器１において
は固定接点１２は銀や銀合金などの展延性のよい材料で
作られた球面形の接点を、固定接点支持体７とプロジェ
クション溶接等の方法で溶着した後にプレスなどによっ
て塑性変形され図２の如く、その高さＨを調整すると同
時に可動接点１１との接触面１２Ａを所定の形状、本実
施例では平面状にされている。この熱応動開閉器１の動
作については従来例のものと同様なので説明は省略す
る。Embodiments of the present invention will be described below with reference to the drawings. The heat-actuated switch 1 of FIG. 1 is the heat-actuated switch of the present invention, and the same parts as those in the above-mentioned conventional example are designated by the same reference numerals and the description thereof will be omitted. In this heat-actuated switch 1, the fixed contact 12 is a spherical contact made of a material having good spreadability such as silver or silver alloy, and is welded to the fixed contact support 7 by a method such as projection welding and then pressed. As shown in FIG. 2, the height H is adjusted by plastic deformation, and at the same time, the contact surface 12A with the movable contact 11 is formed into a predetermined shape, which is a flat surface in this embodiment. The operation of this heat-actuated switch 1 is the same as that of the conventional example, and therefore its explanation is omitted.
【００１４】この実施例によれば固定接点１２を固定接
点支持体７に固定した後に接点の高さを調整しているの
で、その高さＨを高い寸法精度で揃えることが可能にな
り、製品毎のばらつきが少なくなるため温度調節作業が
行ないやすくなる。実験によると従来の様に固定接点を
溶接したままの状態では、固定接点支持体の背面から接
点の接触面までの基準高さ１．４mmに対して±０．２mm
以上の誤差がでたが、本実施例においては１．１５mm＋
０mm乃至−０．０５mmの範囲でその高さを揃える事がで
きた。また固定接点１２の接触面１２Ａが平面状とされ
ているため、固定接点１２と可動接点１１の位置関係が
前後左右に前記平面内でずれたとしても接点の接触圧の
変化をなくすことができる。そのため密閉容器構成後に
接点圧力の不良により温度較正不可能になることはな
い。また固定接点１２をプロジェクション溶接などで固
定接点支持体７に固着したものなどにおいては、プレス
時に溶接部附近が潰れる事により固定接点１２と固定接
点支持体７との接触面積が広くなるため、接点開放時に
発生するアークなどにより加熱される固定接点１２の熱
が固定接点支持体７側に逃げやすくなり、また接点開放
時の瞬間的な大電流による溶接部での発熱が抑えられ接
点の寿命を長くする事ができる。According to this embodiment, since the height of the contact is adjusted after fixing the fixed contact 12 to the fixed contact support 7, it is possible to make the height H uniform with high dimensional accuracy. Since the variation from time to time is reduced, it becomes easier to perform the temperature adjustment work. According to the experiment, with the fixed contact welded as in the past, ± 0.2 mm from the standard height of 1.4 mm from the back surface of the fixed contact support to the contact surface of the contact.
Although the above error occurred, in this embodiment, 1.15 mm +
The height could be made uniform in the range of 0 mm to -0.05 mm. Further, since the contact surface 12A of the fixed contact 12 is flat, even if the positional relationship between the fixed contact 12 and the movable contact 11 deviates back and forth and left and right within the plane, it is possible to eliminate the change in the contact pressure of the contact. . Therefore, the temperature cannot be calibrated due to poor contact pressure after the closed container is constructed. Further, in the case where the fixed contact 12 is fixed to the fixed contact support 7 by projection welding or the like, the contact area between the fixed contact 12 and the fixed contact support 7 becomes large because the vicinity of the welded portion is crushed during pressing. The heat of the fixed contact 12, which is heated by the arc generated when the contact is opened, easily escapes to the fixed contact support body 7 side, and heat generation at the welded portion due to the momentary large current when the contact is opened is suppressed, and the life of the contact is extended. It can be long.
【００１５】本実施例では固定接点１２の高さＨを固定
接点支持体７の背面７Ａから規定しているが、もちろん
表面７Ｂから規定してもよい。また可動接点と固定接点
との位置関係にずれが生じないかそのずれによる影響が
少ない場合には固定接点の接触面の形状を球面状などの
所定の形状としてもよい。In the present embodiment, the height H of the fixed contact 12 is defined by the back surface 7A of the fixed contact support 7, but may be defined by the surface 7B. If the positional relationship between the movable contact and the fixed contact does not deviate or the influence of the deviation is small, the contact surface of the fixed contact may have a predetermined shape such as a spherical shape.
【００１６】次に他の実施例について説明する。図３の
熱応動開閉器２１は蓋板２２とハウジング２３により密
閉容器が構成されている。蓋板２２は鉄の如き金属板２
４に穿たれた孔に導電端子ピン２５を電気絶縁性の充填
材２６により気密に貫通固定されている。導電端子ピン
２５の密閉容器内部側の端部には熱応動板支持体２７の
一端２７Ａが導電的に固着されており、他端２７Ｂには
セラミックなど電気絶縁材料製の較正片２８がハウジン
グ２３の内面と当接するように固定されている。また熱
応動板支持体２７には溶接用の当て板２９を介してバイ
メタルの如き熱応動板３０の一端が電気的に接続固定さ
れている。熱応動板３０は皿状に絞り加工され所定の第
１の温度で急跳反転し第２の温度で急跳復帰するように
設定されている。熱応動板３０の他端には可動接点３１
が固着されている。またこの可動接点３１と接触・開離
可能に固定接点３２が固定接点支持体たる金属板２４に
固着されている。この固定接点３２は金属板２４に溶接
などにより固着された後に、前述の如き方法などにより
高さを調整されると共に可動接点３２の接触面３２Ａを
平面状にされている。Next, another embodiment will be described. In the heat-actuated switch 21 of FIG. 3, a cover plate 22 and a housing 23 form a closed container. The lid plate 22 is a metal plate 2 such as iron.
The electrically conductive terminal pin 25 is airtightly fixed to the hole formed in 4 by an electrically insulating filling material 26. One end 27A of a heat responsive plate support 27 is conductively fixed to an end of the conductive terminal pin 25 on the inside of the closed container, and a calibration piece 28 made of an electrically insulating material such as ceramic is attached to the other end 27B of the housing 23. It is fixed so as to abut the inner surface of the. Further, one end of a heat responsive plate 30, such as a bimetal, is electrically connected and fixed to the heat responsive plate support 27 via a contact plate 29 for welding. The heat responsive plate 30 is drawn into a dish shape and is set so as to make a sudden jump inversion at a predetermined first temperature and make a sudden jump recovery at a second temperature. A movable contact 31 is provided at the other end of the thermal actuator plate 30.
Is stuck. Further, a fixed contact 32 is fixed to a metal plate 24 serving as a fixed contact support so as to be able to come into contact with and separate from the movable contact 31. After the fixed contact 32 is fixed to the metal plate 24 by welding or the like, the height thereof is adjusted by the above-mentioned method and the contact surface 32A of the movable contact 32 is made flat.
【００１７】この熱応動開閉器２１の動作について説明
すると、所定の第１の温度に達するまでは熱応動板３０
は図３に示すように可動接点３１と固定接点３２を接触
させる方向に湾曲しており、このとき導電端子ピン２５
−熱応動板支持体２７−熱応動板３０−可動接点３１−
固定接点３２−金属板２４の経路で電路が構成されてい
る。熱応動開閉器２１の周囲の雰囲気温度が上昇したり
内部に流れる電流値が上昇することにより熱応動板の温
度が前記第１の温度に達すると、熱応動板３０は急激に
その湾曲方向を反転することにより可動接点３１と固定
接点３２を開離し、電路を確実に遮断する。また反転し
た熱応動板３０は所定の第２の温度にまでその温度が下
がると急跳復帰してその湾曲方向を初期の方向に戻し可
動接点３１と固定接点３２を接触させることにより電路
を復帰させる。The operation of the heat-responsive switch 21 will be described. The heat-responsive plate 30 is used until the predetermined first temperature is reached.
Is curved in the direction in which the movable contact 31 and the fixed contact 32 are brought into contact with each other as shown in FIG.
-Heat responsive plate support 27-Heat responsive plate 30-Movable contact 31-
An electric path is formed by the path of the fixed contact point 32-the metal plate 24. When the temperature of the heat responsive plate reaches the first temperature due to an increase in the ambient temperature around the heat responsive switch 21 or an increase in the value of the current flowing inside, the heat responsive plate 30 rapidly changes its bending direction. By reversing, the movable contact 31 and the fixed contact 32 are separated, and the electric path is surely cut off. When the temperature of the inverted heat responsive plate 30 drops to a predetermined second temperature, the heat responsive plate 30 suddenly returns to its original direction and returns its bending direction to the movable contact 31 and the fixed contact 32 to restore the electric path. Let
【００１８】またその動作温度較正はハウジング２３の
較正部分２３Ａ付近を変形させることにより行なう。こ
のとき較正片２８を介して熱応動板支持体の端部２７Ｂ
が変位されるが、熱応動板の固着部よりも導電端子ピン
寄りの部分２７Ｃを他の部分よりも巾を狭くする等して
おくことによりこの部分２７Ｃを中心に熱応動板支持体
２７は回動され可動接点を固定接点側に押し付けて接点
圧力を較正する。The operating temperature calibration is performed by deforming the vicinity of the calibration portion 23A of the housing 23. At this time, the end 27B of the heat responsive plate support is inserted through the calibration piece 28.
Is displaced, but by making the width of the portion 27C closer to the conductive terminal pin than the fixed portion of the heat responsive plate smaller than the other portions, the heat responsive plate support 27 will be centered around this portion 27C. The contact pressure is calibrated by rotating and pressing the movable contact against the fixed contact side.
【００１９】この熱応動開閉器２１においてもまた固定
接点３２を溶接などにより固定接点支持体たる金属板３
０に溶着してから、金属板の所定面からの固定接点の高
さを調整しているために製品毎の接点高さ及び接点圧の
ばらつきが少なく、組付後の温度較正作業が容易にな
る。In this heat-actuated switch 21, the fixed contact 32 is also welded to the metal plate 3 serving as a fixed contact support.
Since the height of the fixed contact from the predetermined surface of the metal plate is adjusted after welding at 0, there is little variation in contact height and contact pressure among products, and temperature calibration work after assembly is easy. Become.
【００２０】つぎに図４を参照してさらに他の実施例に
ついて説明する。この熱応動開閉器４１は例えば密閉形
電動圧縮機などの周知の電動機の保護用に使われるもの
であり、金属製の有底円筒形のハウジング４２と蓋板４
３により密閉容器を構成している。この蓋板４３は金属
板４４に穿たれた２個の孔の各々に導電端子ピン４５Ａ
及び４５Ｂを電気絶縁性の充填材４６により気密に貫通
固定されて構成されている。一方の導電端子ピン４５Ａ
の容器内部側の端部には熱応動板支持体４７の一端が固
着されており、この熱応動板支持体４７の他端には溶接
と後述する動作温度較正作業の為のラグプレート４８を
介して熱応動板４９の一端が電気的に接続され固定され
ている。熱応動板４９の自由端には可動接点５０が固着
されており、後述の固定接点と接触・開離可能に配置さ
れている。他方の導電端子ピン４５Ｂの容器内部側の端
部には鉄の如き強度を有した金属製の固定端子支持体５
１が固着され、この固定接点支持体５１には固定接点５
２が固着されている。なお記号５３は接点開放時のアー
クから充填材４６を保護する碍子であり、記号５４は金
属板４４と熱応動板支持体４７の間に接続されたヒータ
である。また記号５５は後述する温度較正に使用するネ
ジである。Next, another embodiment will be described with reference to FIG. The heat-actuated switch 41 is used for protection of a known electric motor such as a hermetic electric compressor, and has a bottomed cylindrical metal housing 42 and a cover plate 4.
3 constitutes a closed container. This cover plate 43 has conductive terminal pins 45A in each of the two holes formed in the metal plate 44.
And 45B are airtightly penetrated and fixed by an electrically insulating filler 46. One conductive terminal pin 45A
One end of a heat responsive plate support 47 is fixed to the end of the container inside of the container, and a lug plate 48 for welding and operation temperature calibration work described later is attached to the other end of the heat responsive plate support 47. One end of the heat responsive plate 49 is electrically connected and fixed via the. A movable contact 50 is fixed to the free end of the heat responsive plate 49, and is arranged so as to be in contact with and separated from a fixed contact described later. At the end of the other conductive terminal pin 45B on the inner side of the container, a fixed terminal support 5 made of metal having strength such as iron.
1 is fixed, and the fixed contact 5 is fixed to the fixed contact support 51.
2 is stuck. Reference numeral 53 is an insulator that protects the filling material 46 from the arc when the contacts are opened, and reference numeral 54 is a heater connected between the metal plate 44 and the heat responsive plate support 47. The symbol 55 is a screw used for temperature calibration described later.
【００２１】次にこの熱応動開閉器４１が密閉形電動圧
縮機などの電動機に使用されたときの動作について説明
する。熱応動開閉器４１の導電端子ピン４５Ａは図示し
ない電動機の主巻線に、ハウジング４２または金属板４
４が電動機の起動用の補助巻線に、導電端子ピン４５Ｂ
が図示しない電源に接続される。また主巻線と補助巻線
の他端は共通にされて電源に接続されている。通常の使
用においては熱応動板４９は図４に示す如く図示上方に
凸となっており可動接点５０と固定接点５２とは接触し
ている。このとき導電端子ピン４５Ｂ−固定接点支持体
５１−固定接点５２−可動接点５０−熱応動板４９−ラ
グプレート４８−熱応動板支持体４７−導電端子ピン４
５Ａ（または熱応動板支持体４７−ヒータ５４−金属板
４４−ハウジング４２）の順で電路が構成される。主巻
線側の異常電流により熱応動板４９の発熱や、補助巻線
側の異常電流によるヒータ５４の発熱や、熱応動開閉器
の取付位置やその周囲の温度上昇により熱応動板４９の
温度が第１の設定温度に達すると熱応動板４９は急跳反
転し可動接点５０と固定接点５２を開離し電路を遮断す
る。また反転した熱応動板４９の温度が第２の設定温度
にまで下がると熱応動板は図示の位置に急跳復帰し電路
を閉成する。なおヒータ５４は必ずしも必要ではなく、
主巻線・補助巻線ともに導電端子ピン４５Ａに接続する
事により省略する場合もある。Next, the operation of the heat responsive switch 41 when it is used in an electric motor such as a hermetic electric compressor will be described. The conductive terminal pin 45A of the heat-actuated switch 41 is attached to the main winding of the motor (not shown), the housing 42 or the metal plate 4
4 is an auxiliary winding for starting the motor, and a conductive terminal pin 45B
Is connected to a power source (not shown). The other ends of the main winding and the auxiliary winding are commonly connected to the power source. In normal use, the heat responsive plate 49 is convex upward in the drawing as shown in FIG. 4, and the movable contact 50 and the fixed contact 52 are in contact with each other. At this time, the conductive terminal pin 45B-fixed contact support 51-fixed contact 52-movable contact 50-thermodynamic plate 49-lug plate 48-thermal plate support 47-conductive terminal pin 4
5A (or heat-responsive plate support 47-heater 54-metal plate 44-housing 42) constitutes an electric path in this order. The temperature of the heat responsive plate 49 is increased by the abnormal current on the main winding side, the heat of the heater 54 is generated by the abnormal current on the auxiliary winding side, and the temperature of the heat responsive plate 49 is increased by the mounting position of the heat responsive switch and its surrounding temperature rise. When the temperature reaches the first set temperature, the thermal responsive plate 49 suddenly reverses to open the movable contact 50 and the fixed contact 52 and disconnect the electric path. When the temperature of the inverted heat responsive plate 49 drops to the second set temperature, the heat responsive plate suddenly returns to the position shown in the figure to close the electric circuit. The heater 54 is not always necessary,
Both the main winding and the auxiliary winding may be omitted by connecting to the conductive terminal pin 45A.
【００２２】この熱応動開閉器４１の動作温度の較正に
ついて説明すると、ハウジング４２と蓋板４３により密
閉容器を構成する前に行ない、較正部材たるネジ５５に
よりラグプレート４８を変位させることにより熱応動板
４９をラグプレート４８と熱応動板支持体４７との固着
点の近傍を中心に回動させる。そのため可動接点５０と
固定接点５２との間の接触圧が調整され、所定の動作温
度で熱応動板４９が反転するように較正される。The calibration of the operating temperature of the heat-actuated switch 41 will be explained. Before the construction of the closed container by the housing 42 and the lid plate 43, the heat-actuated switch 41 is displaced by displacing the lug plate 48 by the screw 55 as a calibration member. The plate 49 is rotated about the vicinity of the fixing point between the lug plate 48 and the heat responsive plate support 47. Therefore, the contact pressure between the movable contact 50 and the fixed contact 52 is adjusted, and the thermal responsive plate 49 is calibrated so as to be inverted at a predetermined operating temperature.
【００２３】このとき固定接点５２が固定接点支持体５
１と溶接などにより溶着された後で高さを調整されると
共にその接触面を平面状にされている事により、従来の
ものより温度較正前の接点間の接触圧を揃えやすくなり
温度較正作業が容易になる。At this time, the fixed contact 52 is replaced by the fixed contact support 5
Since the height is adjusted and the contact surface is made flat after being welded to No. 1 by welding, etc., the contact pressure between the contacts before temperature calibration can be made more uniform than the conventional one, and temperature calibration work can be performed. Will be easier.
【００２４】さらに他の実施例について図５乃至図７を
参照して説明する。図５の熱応動開閉器６１は例えば三
相誘導電動機に使用されるものであり、特願平３−１８
５６８４号に示されたものである。この三相用熱応動開
閉器６１は蓋板６２とハウジング６３から密閉容器を構
成している。蓋板６２は金属板６４に穿たれた２個の孔
の各々に導電端子ピン６５Ａ，６５Ｂが挿通され、電気
絶縁性の充填材６６により気密に固定されている。導電
端子ピン６５Ａ，６５Ｂの容器内部側の先端には各々固
定接点支持体６７Ａ，６７Ｂの一端が前記金属板６４と
ほぼ平行になるように固着され、この固定接点支持体の
他端には夫々固定接点６８Ａ，６８Ｂが固着されてい
る。また固定接点支持体６７Ａ，６７Ｂと金属板６４の
間には、セラミックなどの電気絶縁材料製のスペーサー
６９が配置されており、固定接点支持体を支えると共に
固定接点支持体と金属板との電気的絶縁を保っている。Still another embodiment will be described with reference to FIGS. The heat-actuated switch 61 of FIG. 5 is used, for example, in a three-phase induction motor.
No. 5684. This three-phase heat-actuated switch 61 comprises a cover plate 62 and a housing 63 to form a closed container. In the cover plate 62, the conductive terminal pins 65A and 65B are inserted into each of the two holes formed in the metal plate 64, and the cover plate 62 is airtightly fixed by the electrically insulating filling material 66. One ends of fixed contact supports 67A and 67B are fixed to the tips of the conductive terminal pins 65A and 65B on the inner side of the container so as to be substantially parallel to the metal plate 64, and the other ends of the fixed contact supports are respectively fixed. The fixed contacts 68A and 68B are fixed. In addition, a spacer 69 made of an electrically insulating material such as ceramic is disposed between the fixed contact point supports 67A and 67B and the metal plate 64 to support the fixed contact point support body and to electrically connect the fixed contact point support body and the metal plate. Keeps a static insulation.
【００２５】ハウジング６３の内面には温度較正板７０
の後述する曲げ部７０Ａに近い側の端部が固着されこの
固着部近傍に充分な弾性を有した熱応動板支持体７１の
一端が固着されている。熱応動板支持体７１の他端には
概ね円形で皿状に絞り加工された熱応動板７３が剛性の
高い金属製のラグプレート７２を介して電気的に接続さ
れるように固着されている。ラグプレート７２はスペー
サー６９の突起状の支承部６９Ａと当接している。熱応
動板７３は例えば図８に示すような平面形状をしてお
り、ラグプレート７２を介して支承部６９Ａと当接する
点７３Ａを通る中心線７３Ｂに対称となるように可動接
点７４Ａ，７４Ｂが固着されている。熱応動板７３の常
温時に凸となる面の中心線７３Ｂ上にはセラミックなど
の電気絶縁性の較正片７５が当接するように配置されて
おり、この較正片７５は熱応動板支持体７１に穿たれた
孔を貫通して他方を温度較正板７０と当接されている。A temperature calibration plate 70 is provided on the inner surface of the housing 63.
The end portion on the side close to the bent portion 70A, which will be described later, is fixed, and one end of the heat responsive plate support 71 having sufficient elasticity is fixed near the fixed portion. A generally circular circular plate-shaped heat responsive plate 73 is fixed to the other end of the heat responsive plate support 71 so as to be electrically connected via a highly rigid metal lug plate 72. . The lug plate 72 is in contact with the protruding support portion 69A of the spacer 69. The heat responsive plate 73 has, for example, a planar shape as shown in FIG. 8, and the movable contacts 74A and 74B are arranged so as to be symmetrical with respect to a center line 73B passing through a point 73A that abuts the bearing 69A via the lug plate 72. It is fixed. An electrically insulating calibration piece 75 made of ceramic or the like is disposed so as to abut on the center line 73B of the surface of the heat responsive plate 73 that is convex at room temperature. The calibration piece 75 is attached to the heat responsive plate support 71. The other one is abutted against the temperature calibration plate 70 through the hole drilled.
【００２６】この熱応動開閉器の動作について説明する
と、例えば密閉形電動圧縮機などに用いられる所謂星形
結線の三相誘導電動機などに用いられ、導電端子ピン６
５Ａ，６５Ｂ及びハウジング６３の各々を三相誘導電動
機の３個の巻線に接続しその中点を同時に開閉するよう
にして使用される。その電路についての詳しい説明は省
略するが、各々の導電端子ピンとハウジング間、及び両
導電端子間の３つの経路が構成され、どの電路もほぼ均
等な抵抗値となるように設計されている。そのため巻線
の異常等を原因とする過電流による発熱や、周囲の温度
上昇などにより熱応動板７３が所定の第１の動作温度に
達すると急跳動作によりその湾曲方向を反転し、２対の
接点間を同時に開放し電路を遮断する。The operation of this heat-actuated switch will be described. For example, it is used in a so-called star-shaped three-phase induction motor used in a hermetic electric compressor, and the conductive terminal pin 6 is used.
Each of 5A, 65B and the housing 63 is connected to three windings of a three-phase induction motor, and the midpoints thereof are simultaneously opened and closed for use. Although detailed description of the electric path is omitted, three paths are formed between each conductive terminal pin and the housing, and between both conductive terminals, and all the electric paths are designed to have substantially equal resistance values. Therefore, when the heat responsive plate 73 reaches a predetermined first operating temperature due to heat generation due to an overcurrent due to an abnormality of the winding or a rise in ambient temperature, the curving direction is reversed by the sudden jumping operation, and the two pairs are paired. The contacts of are opened simultaneously and the electric circuit is cut off.
【００２７】この熱応動開閉器６１の動作温度の較正に
ついて説明すると、温度の較正はハウジング６３の較正
部６３Ａを変形させることにより行なう。これにより温
度較正板７０の図示右端を変位させ、他の部分に比較し
て巾を狭くする等された曲げ部７０Ａを中心に回動させ
ると挺子の原理で較正片７５を介して熱応動板７３に力
が加えられ、可動接点７４と固定接点６８との間の接触
圧を調整することにより動作温度が較正される。The calibration of the operating temperature of the heat responsive switch 61 will be described. The calibration of the temperature is performed by deforming the calibration portion 63A of the housing 63. As a result, the right end of the temperature calibration plate 70 in the figure is displaced, and when it is rotated around the bent portion 70A whose width is made narrower than other portions, it is thermally actuated via the calibration piece 75 by the principle of the boom. A force is applied to the plate 73 to calibrate the operating temperature by adjusting the contact pressure between the movable contact 74 and the fixed contact 68.
【００２８】この時、本実施例の熱応動開閉器６１は固
定接点及び可動接点を各々２個有しているために、この
２対の接点間の接触圧が概ね均等になるようにしない
と、一方の接点間が他方の接点間よりも早く開離してし
まう所謂片切れの状態が発生する。そのため可動接点７
４Ａ及び７４Ｂに対する力の印加方法が適切に設定され
ていても固定接点６８Ａ及び６８Ｂの高さが違うと接触
圧が均等にならず片切れが発生する事になる。また密閉
容器を形成した後に温度較正を行なうために温度較正後
に片切れの発生が発見されたものを修正する事は不可能
なため、接点の高さを揃えておく事は重要になる。At this time, since the heat-actuated switch 61 of this embodiment has two fixed contacts and two movable contacts, the contact pressure between these two pairs of contacts must be made substantially equal. A so-called one-sided state occurs in which one of the contacts is separated earlier than the other of the contacts. Therefore, the movable contact 7
Even if the method of applying the force to 4A and 74B is properly set, if the heights of the fixed contacts 68A and 68B are different, the contact pressure is not uniform and one-sided cutting occurs. Further, since the temperature calibration is performed after the closed container is formed, it is impossible to correct the one in which the occurrence of the breakage after the temperature calibration is found, so it is important to make the contact heights uniform.
【００２９】そこで本実施例においては固定接点支持体
６７に固定接点６８を溶接などの方法で固着した後に前
述したような方法などで接点高さを調節しているため
に、固定接点６８Ａ及び６８Ｂ双方の高さを揃えること
ができ、２対の接点間の接点圧を揃えやすくなり片切れ
の発生を押える事ができる。また製品毎の固定接点の高
さも安定するために、接点圧の較正つまり動作温度の較
正が容易になるとともに接点開放時の両接点間の距離を
揃えることが容易になり接点間耐圧のばらつきがなくな
る。さらに両固定接点の接触面６８Ａ１，６８Ｂ１を平
面状としているため、組付時に可動接点と固定接点との
位置関係が多少ずれてもその接触位置での固定接点の高
さは変化しないためにその接触圧及び接点間耐圧には影
響がない。Therefore, in this embodiment, since the fixed contact 68 is fixed to the fixed contact support 67 by welding or the like and then the contact height is adjusted by the above-described method, the fixed contacts 68A and 68B are adjusted. Both heights can be made uniform, and the contact pressure between two pairs of contacts can be easily made uniform, and the occurrence of one-sided cuts can be suppressed. In addition, since the height of the fixed contact for each product is stable, it is easy to calibrate the contact pressure, that is, the operating temperature, and it is easy to arrange the distance between both contacts when the contacts are open, which results in variation in breakdown voltage between contacts. Disappear. Further, since the contact surfaces 68A1 and 68B1 of both fixed contacts are made flat, even if the positional relationship between the movable contact and the fixed contact is slightly deviated during assembly, the height of the fixed contact at the contact position does not change. It does not affect the contact pressure or the breakdown voltage between contacts.
【００３０】またこの熱応動開閉器６１においては、固
定接点支持体６７Ａ，６７Ｂがその先端である固定接点
６８Ａ，６８Ｂとの固着点の背面附近でスペーサーと当
接している。この働きについて図９及び図１０を参照し
て説明すると、図９は固定接点支持体６７の一端６７Ｄ
に固定接点６８を固着した様子を示すものである。固定
接点支持体６７の両側面には剛性を上げるためのリブ６
７Ｃが設けられているが、材料の厚さが充分に有り強度
が得られる場合には特に必要とするものではない。固定
接点支持体の固定接点側端部６７Ｄと反対側の端部近傍
の導電端子ピンとの固着部６７Ｅは、プレスによりやや
傾斜させてある。図１０にスペーサー６９を除いたと仮
定した状態を示すように、この固着部６７Ｅを導電端子
ピン６５の端面に溶接等により固着する事により、固定
接点支持体６７は金属板６４側に傾斜するため、実際に
は固定接点支持体６７と金属板６４との間にスペーサー
６９があるので固定接点支持体６７によってスペーサー
６９が金属板６４に押え付けられると共に、固定端子側
の端部６７Ｄの金属板６４との距離がスペーサー６９の
厚みにより規定される。Further, in the heat-actuated switch 61, the fixed contact supports 67A, 67B are in contact with the spacers near the rear surface of the fixed points of the fixed contacts 68A, 68B at the tips thereof. This operation will be described with reference to FIGS. 9 and 10. FIG. 9 shows one end 67D of the fixed contact support 67.
It shows a state in which the fixed contact 68 is fixed to the. Ribs 6 are provided on both sides of the fixed contact support 67 to increase rigidity.
7C is provided, but it is not particularly necessary when the material has a sufficient thickness and strength can be obtained. A fixed portion 67E of the fixed contact support body to the fixed contact side end portion 67D and the conductive terminal pin in the vicinity of the end portion on the opposite side is slightly inclined by pressing. As shown in FIG. 10 assuming that the spacer 69 is removed, the fixed contact portion 67E is fixed to the end surface of the conductive terminal pin 65 by welding or the like, so that the fixed contact support body 67 is inclined toward the metal plate 64 side. Actually, since the spacer 69 is provided between the fixed contact support body 67 and the metal plate 64, the spacer 69 is pressed against the metal plate 64 by the fixed contact support body 67 and the metal plate of the end portion 67D on the fixed terminal side. The distance from 64 is defined by the thickness of the spacer 69.
【００３１】そのため、固定接点の位置精度はスペーサ
ーの厚みの精度に依存するから、通常の組み付けの精度
よりも高い精度で接点の位置を設定する事ができる。Therefore, since the positional accuracy of the fixed contact depends on the accuracy of the thickness of the spacer, it is possible to set the position of the contact with higher accuracy than the accuracy of normal assembly.
【００３２】またこの様な熱応動開閉器において、異常
電流により動作させる場合、電流による熱応動板７３の
発熱だけでは発熱量が不充分な場合などには熱応動板支
持体７１や固定接点支持体６７の抵抗値を高めて発熱量
を上げ熱応動板を加熱する構造とした所謂傍熱形とする
事がある。このとき固定接点支持体６７がスペーサー６
９と全面で密着している場合には固定接点支持体の熱が
スペーサーに奪われてしまい傍熱形として充分に作用し
ないと云う問題がある。Further, in such a heat-actuated switch, when the heat-actuated switch 73 is operated by an abnormal current, and the heat-dissipation of the heat-actuated plate 73 due to the current is insufficient, the heat-actuated plate support 71 or fixed contact support is used. The body 67 may be of a so-called indirectly heated type in which the resistance value of the body 67 is increased to increase the amount of heat generation and the heat responsive plate is heated. At this time, the fixed contact support 67 is the spacer 6
When it is in close contact with the entire surface of No. 9, there is a problem that the heat of the fixed contact support is taken by the spacer and does not work sufficiently as an indirectly heated type.
【００３３】そこで本実施例では固定接点支持体６７と
スペーサ６９とは固定接点支持体の先端部６８Ｄ近傍の
みで当接するようにされており、スペーサー６９との間
に熱的絶縁の為の間隙７６が設けられている。そのた
め、固定接点支持体６７の熱はスペーサー６９に一方的
に奪われる事なく熱応動板７３に有効に与えられる。ま
た固定接点６８との固着部近傍をスペーサー６９と接し
ているために、接点開放時に発生するアークなどにより
加熱される固定接点６８の熱は固定接点支持体を介して
スペーサー６９側に逃がす事ができる。なお本実施例で
は２対の接点を有する三相用熱応動開閉器で説明した
が、接点が１対のものでも同様の効果がある事は云うま
でもない。Therefore, in this embodiment, the fixed contact support 67 and the spacer 69 are made to abut only in the vicinity of the tip 68D of the fixed contact support, and a gap for thermal insulation is provided between the fixed contact support 67 and the spacer 69. 76 is provided. Therefore, the heat of the fixed contact point support body 67 is effectively given to the heat responsive plate 73 without being unilaterally taken by the spacer 69. Further, since the vicinity of the fixed portion with the fixed contact 68 is in contact with the spacer 69, the heat of the fixed contact 68, which is heated by an arc generated when the contact is opened, may escape to the spacer 69 side through the fixed contact support. it can. In this embodiment, the three-phase thermally actuated switch having two pairs of contacts has been described, but it goes without saying that the same effect can be obtained even if the contacts have one pair.
【００３４】[0034]
【発明の効果】本発明によれば、固定接点を固定接点支
持体に溶接した後に固定接点の少なくとも可動接点と接
触する部分をプレスなどの塑性変形加工により、固定接
点支持体の所定部分からの固定接点の高さを所定の値と
すると共に、その接触面を平面状や球面状の所定形状と
する事により、従来の様に固定接点の溶接条件の強弱や
接点の傾きなどによる製品毎の実質的な接点高さのばら
つきを排除する事ができ温度較正作業が容易になる。そ
のため特に密閉容器構成後に容器の一部を変形させて動
作温度較正作業を行なうものでは温度較正前の接点間圧
力を所定の範囲に揃える事ができるので密閉容器構成後
の接点間圧力の不良と動作温度較正不可能な製品の発生
を防ぐ事ができる。また２対以上の接点を有するものに
おいては各接点間の接触圧を揃える事により所謂片切れ
を防止する事ができる。According to the present invention, after the fixed contact is welded to the fixed contact support, at least a portion of the fixed contact that comes into contact with the movable contact is subjected to a plastic deformation process such as pressing to remove it from a predetermined portion of the fixed contact support. By setting the height of the fixed contact to a predetermined value and making the contact surface into a predetermined shape such as a flat surface or a spherical surface, the fixed contact welding condition and the inclination of the contact, as in the past, can be applied to each product. It is possible to eliminate substantial variations in contact height and facilitate temperature calibration work. Therefore, especially in the case where the operation temperature calibration work is performed by deforming a part of the container after the closed container is configured, the contact pressure before temperature calibration can be made to be within a predetermined range. It is possible to prevent the generation of products whose operating temperature cannot be calibrated. Further, in the case of having two or more pairs of contacts, so-called breakage can be prevented by making the contact pressure between the contacts uniform.
【００３５】また可動接点と固定接点を同一のものを使
用し必要な接点だけを変形させる事により、部品の共通
性を保つ事ができる。By using the same movable contact and fixed contact and deforming only the necessary contact, the commonality of parts can be maintained.
【００３６】また加圧により固定接点と固定接点支持体
との固着面積を広げる事により固着部での発熱を避け、
固定接点の熱を固定接点支持体にすみやかに逃がす事が
できる。Further, by expanding the fixed contact area between the fixed contact and the fixed contact support by pressurization, heat generation at the fixed portion is avoided,
The heat of the fixed contact can be quickly released to the fixed contact support.
【００３７】また固定接点支持体をその先端部に向かっ
て蓋板方向にやや変位するように導電端子ピンに溶接す
るなど、固定接点支持体の背面が常にスペーサーとの当
接部を押さえつけるように偏倚力を与えるように構成す
ることにより、固定接点の位置の製品毎のばらつきを押
え高い組付け精度を得る事ができる。In addition, the fixed contact support body is welded to the conductive terminal pins so as to be displaced slightly toward the tip toward the cover plate so that the back surface of the fixed contact support body always presses the contact portion with the spacer. By configuring so as to give a biasing force, it is possible to suppress variations in the positions of the fixed contacts for each product and obtain high assembly accuracy.
【００３８】また固定接点支持体とスペーサーとが固定
接点支持体の先端部近傍でのみ当接し、それ以外の部分
には熱的絶縁の為の間隙を設けた事により、固定接点支
持体の熱はスペーサーに一方的に奪われる事なく熱応動
板に与えられるため、傍熱形の熱応動開閉器においても
確実な動作を得る事ができる。また固定接点との固着部
近傍をスペーサーと接しているために、接点開放時に発
生するアークなどにより加熱される固定接点の熱を固定
接点支持体を介してスペーサー側に逃がす事ができるの
で接点の寿命を延ばす事ができる。Further, since the fixed contact support and the spacer abut only in the vicinity of the tip of the fixed contact support and a gap for thermal insulation is provided in the other portions, the heat of the fixed contact support is increased. Since it is given to the heat responsive plate without being unilaterally taken by the spacer, it is possible to obtain a reliable operation even in an indirectly heated type heat responsive switch. Also, because the vicinity of the fixed contact and the fixed part is in contact with the spacer, the heat of the fixed contact heated by the arc generated when the contact is opened can be dissipated to the spacer side through the fixed contact support body. The life can be extended.
【図１】本発明の製造方法による熱応動開閉器の一実施
例。FIG. 1 shows an embodiment of a heat-actuated switch according to the manufacturing method of the present invention.
【図２】本発明による接点の製造方法を示す図。FIG. 2 is a diagram showing a method of manufacturing a contact according to the present invention.
【図３】本発明の製造方法による熱応動開閉器の他の実
施例。FIG. 3 is another embodiment of the heat-actuated switch according to the manufacturing method of the present invention.
【図４】本発明の製造方法による熱応動開閉器の他の実
施例。FIG. 4 is another embodiment of the heat-actuated switch according to the manufacturing method of the present invention.
【図５】本発明の三相用熱応動開閉器の一実施例。FIG. 5 is an embodiment of a thermally actuated switch for three phases according to the present invention.
【図６】本発明の三相用熱応動開閉器の一実施例。FIG. 6 shows an embodiment of a thermally actuated switch for three phases according to the present invention.
【図７】本発明の三相用熱応動開閉器の一実施例。FIG. 7 shows an embodiment of a three-phase thermally actuated switch according to the present invention.
【図８】三相用熱応動開閉器に使用されるバイメタルを
示す図。FIG. 8 is a view showing a bimetal used for a three-phase thermally actuated switch.
【図９】本発明の熱応動開閉器の固定接点支持体の一実
施例。FIG. 9 is an example of a fixed contact support of the thermally actuated switch of the present invention.
【図１０】本発明の固定接点支持体の溶接状態を示すた
めの説明図。FIG. 10 is an explanatory view showing a welded state of the fixed contact support of the present invention.
【図１１】従来の製造方法による熱応動開閉器の一実施
例。FIG. 11 is an example of a heat-actuated switch according to a conventional manufacturing method.
【図１２】従来の製造方法による熱応動開閉器の接点部
分を示す図。FIG. 12 is a view showing a contact portion of a heat-actuated switch according to a conventional manufacturing method.
１，２１，４１，６１：熱応動開閉器 ２，４４，６４：金属板 ３，２５，４５Ａ，４５Ｂ，６５Ａ，６５Ｂ：導電端子
ピン ４，２６，４６，６６：電気絶縁性充填材 ５，２２，４３，６２：蓋板 ６，２３，４２，６３：ハウジング ７，５１，６７Ａ，６７Ｂ：固定接点支持体 １２，３２，５２，６８Ａ，６８Ｂ：固定接点 ９，３０，４９，７３：熱応動板 １１，３１，５０，７４Ａ，７４Ｂ：可動接点 ２４：金属板（固定接点支持体） ２７，４７，７１：熱応動板支持体 ２８，７５：較正片 ６９：スペーサー ６９Ａ：支承部 ７０：温度較正板1, 21, 41, 61: Thermally-actuated switch 2, 44, 64: Metal plate 3, 25, 45A, 45B, 65A, 65B: Conductive terminal pin 4, 26, 46, 66: Electrical insulating filler 5, 22, 43, 62: cover plate 6, 23, 42, 63: housing 7, 51, 67A, 67B: fixed contact support 12, 32, 52, 68A, 68B: fixed contact 9, 30, 49, 73: heat Response plate 11, 31, 50, 74A, 74B: Moving contact 24: Metal plate (fixed contact support body) 27, 47, 71: Thermal response plate support body 28, 75: Calibration piece 69: Spacer 69A: Bearing portion 70: Temperature calibration plate
Claims (5)
を電気絶縁性の充填材により気密に貫通固定した蓋板
と、金属製のハウジングを有し、該ハウジングの開口端
面を前記蓋板に固着する事により気密容器を構成し、該
気密容器内部には所定の第１の温度で湾曲方向を急跳反
転し第２の温度で急跳復帰するよう予め設定された導電
性の熱応動板を有し、該熱応動板の一端は前記ハウジン
グ又は導電端子の一方に電気的に接続されるとともに、
熱応動板の他端には可動接点が固着され、該可動接点が
前記導電端子又はハウジングに電気的に接続された固定
接点と接離可能にされ導電端子とハウジングとの間の電
路を開閉可能にされた熱応動開閉器において、固定接点
を固定接点支持体に溶着した後に固定接点の少なくとも
可動接点と接触する部分を塑性変形加工により固定接点
支持体の所定部分からの固定接点の高さを所定の値とす
るとともに、その接触面を所定の形状にする事を特徴と
する熱応動開閉器の製造方法。1. A lid plate, in which a conductive terminal is airtightly penetrated and fixed in a hole formed in a conductive metal plate by an electrically insulating filler, and a metal housing, the opening end face of the housing An airtight container is configured by being fixed to the lid plate, and inside the airtight container is a conductive material that is preset so that the bending direction is suddenly reversed at a predetermined first temperature and suddenly returned at a second temperature. A heat-responsive plate, one end of which is electrically connected to the housing or one of the conductive terminals,
A movable contact is fixed to the other end of the heat responsive plate, and the movable contact can be brought into contact with and separated from the conductive terminal or a fixed contact electrically connected to the housing, so that an electric path between the conductive terminal and the housing can be opened and closed. In the heat-actuated switch, the fixed contact is welded to the fixed contact support, and then at least a portion of the fixed contact that comes into contact with the movable contact is subjected to plastic deformation to increase the height of the fixed contact from a predetermined portion of the fixed contact support. A method of manufacturing a heat-actuated switch, which is characterized in that a predetermined value is set and a contact surface thereof has a predetermined shape.
れぞれに導電端子を電気絶縁性の充填材により気密に貫
通固定した蓋板と、金属製のハウジングを有し、該ハウ
ジングの開口端面を前記蓋板に固着する事により気密容
器を構成し、該気密容器内部には所定の第１の温度で湾
曲方向を急跳反転し第２の温度で急跳復帰するよう予め
設定された導電性の熱応動板を有し、該熱応動板の一端
は前記ハウジング又は導電端子の内の一個所に電気的に
接続されるとともに、熱応動板の他端には可動接点が固
着され、該可動接点が熱応動板が接続されたのとは別の
導電端子又はハウジングに電気的に接続された固定接点
と接離可能にされ導電端子とハウジングとの間の電路を
開閉可能にされた熱応動開閉器において、固定接点を固
定接点支持体に溶着した後に固定接点の少なくとも可動
接点と接触する部分を塑性変形加工により固定接点支持
体の所定部分からの固定接点の高さを所定の値とすると
ともに、その接触面を所定の形状にする事を特徴とする
熱応動開閉器の製造方法。2. A cover plate, in which conductive terminals are airtightly fixed to each of a plurality of holes formed in a conductive metal plate with an electrically insulative filler, and a metal housing. An airtight container is configured by fixing the opening end face to the lid plate, and inside the airtight container is preset so that the bending direction is suddenly reversed at a predetermined first temperature and suddenly returned at a second temperature. Has a conductive heat responsive plate, one end of which is electrically connected to one of the housing or the conductive terminal, and the movable contact is fixed to the other end of the heat responsive plate. , The movable contact is separable from a conductive terminal different from the one to which the heat responsive plate is connected or a fixed contact electrically connected to the housing, and the electric path between the conductive terminal and the housing can be opened and closed. Welded fixed contacts to fixed contact supports in heat-actuated switches After that, at least the portion of the fixed contact that comes into contact with the movable contact is subjected to plastic deformation processing to set the height of the fixed contact from a predetermined portion of the fixed contact support to a predetermined value, and to form the contact surface into a predetermined shape. A method for manufacturing a heat-actuated switch, which is characterized.
数の孔のそれぞれに導電端子を電気絶縁性の充填材によ
り気密に貫通固定した蓋板と、金属製のハウジングを有
し、該ハウジングの開口端面を前記蓋板に固着する事に
より気密容器を構成し、導電端子の容器内部側には前記
金属板とほぼ平行に配設された固定接点支持体の一端が
導電的に接続固定されるとともに固定接点支持体の他端
には固定接点が固着され、該固定接点支持体と金属板と
の間にはセラミックの如き電気絶縁性のスペーサーが配
設されるとともに固定接点支持体の固定接点固着側の背
面が当接するようにされ、前記ハウジングの内面には所
定の第１の温度で湾曲方向を急跳反転し第２の温度で急
跳復帰するよう予め設定された導電性の熱応動板の一端
が電気的に接続されるとともに、該熱応動板の他端には
前記固定接点と対応し接離可能にされた可動接点が固着
され、導電端子とハウジングとの間の電路を開閉可能に
された熱応動開閉器において、固定接点支持体の背面が
常にスペーサーとの当接部を押さえつけるように偏倚力
を与えるように構成され固定接点の位置を常に一定に保
つようにされた事を特徴とする熱応動開閉器。3. A cover plate, in which a conductive terminal is airtightly fixed through an electrically insulating filler in each of one or a plurality of holes formed in a conductive metal plate, and a metal housing, An airtight container is formed by fixing the opening end surface of the housing to the lid plate, and one end of a fixed contact support body arranged substantially parallel to the metal plate is conductively connected to the inside of the container of the conductive terminal. A fixed contact is fixed to the other end of the fixed contact support, and an electrically insulating spacer such as ceramic is disposed between the fixed contact support and the metal plate, and the fixed contact support is also provided. The back surface of the fixed contact fixed side of the housing abuts on the inner surface of the housing, and the inner surface of the housing has a preset conductivity so that the bending direction is suddenly reversed at a predetermined first temperature and rapidly returned at a second temperature. One end of the thermal response plate of the At the other end of the heat responsive plate, a movable contact corresponding to the fixed contact and capable of contact and separation is fixed, and a heat responsive switch capable of opening and closing an electric path between a conductive terminal and a housing is provided. , A heat-actuated switch characterized in that the back surface of the fixed contact support body is configured to give a biasing force so as to always press the contact portion with the spacer, and the position of the fixed contact is always kept constant.
られるように固定接点支持体の先端部に向かって蓋板方
向にやや変位するように固定された事を特徴とする請求
項３の熱応動開閉器。4. The thermally actuated opening / closing according to claim 3, wherein the fixed contact support is fixed so as to be pressed against the spacer so as to be slightly displaced toward the end plate of the fixed contact support in the lid plate direction. vessel.
点支持体の先端部近傍でのみ当接し、それ以外の部分に
は熱的絶縁の為の間隙を設けた事を特徴とする請求項３
または請求項４の熱応動開閉器。5. The fixed contact support and the spacer are in contact with each other only near the tip of the fixed contact support, and a gap for thermal insulation is provided in the other portion.
Alternatively, the heat-actuated switch according to claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10747793A JP2860517B2 (en) | 1993-04-09 | 1993-04-09 | Thermal responsive switch and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10747793A JP2860517B2 (en) | 1993-04-09 | 1993-04-09 | Thermal responsive switch and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06295651A true JPH06295651A (en) | 1994-10-21 |
| JP2860517B2 JP2860517B2 (en) | 1999-02-24 |
Family
ID=14460208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10747793A Expired - Fee Related JP2860517B2 (en) | 1993-04-09 | 1993-04-09 | Thermal responsive switch and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2860517B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100612629B1 (en) * | 1998-06-04 | 2006-08-14 | 에.게.오. 에렉트로-게래테바우 게엠베하 | Temperature Switch, Particulary Adjustable Temperature Regulator |
| WO2009144771A1 (en) * | 2008-05-30 | 2009-12-03 | 株式会社生方製作所 | Thermally-actuated switch |
| WO2014155679A1 (en) * | 2013-03-29 | 2014-10-02 | 株式会社生方製作所 | Thermoresponsive switch and method for manufacturing same |
| US9837231B2 (en) | 2013-01-21 | 2017-12-05 | Ubukata Industries Co., Ltd. | Thermal switch, method of manufacturing the same and device for adjusting height of movable contact |
| WO2022059067A1 (en) * | 2020-09-15 | 2022-03-24 | 株式会社生方製作所 | Motor protector |
-
1993
- 1993-04-09 JP JP10747793A patent/JP2860517B2/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100612629B1 (en) * | 1998-06-04 | 2006-08-14 | 에.게.오. 에렉트로-게래테바우 게엠베하 | Temperature Switch, Particulary Adjustable Temperature Regulator |
| WO2009144771A1 (en) * | 2008-05-30 | 2009-12-03 | 株式会社生方製作所 | Thermally-actuated switch |
| JP5288292B2 (en) * | 2008-05-30 | 2013-09-11 | 株式会社生方製作所 | Thermally sensitive switch |
| US8547196B2 (en) | 2008-05-30 | 2013-10-01 | Ubukata Industries Co., Ltd. | Thermally responsive switch |
| US9837231B2 (en) | 2013-01-21 | 2017-12-05 | Ubukata Industries Co., Ltd. | Thermal switch, method of manufacturing the same and device for adjusting height of movable contact |
| JP6078859B2 (en) * | 2013-03-29 | 2017-02-15 | 株式会社生方製作所 | Thermally responsive switch and manufacturing method thereof |
| CN105264628A (en) * | 2013-03-29 | 2016-01-20 | 株式会社生方制作所 | Thermoresponsive switch and method for manufacturing same |
| WO2014155679A1 (en) * | 2013-03-29 | 2014-10-02 | 株式会社生方製作所 | Thermoresponsive switch and method for manufacturing same |
| US9972470B2 (en) | 2013-03-29 | 2018-05-15 | Ubukata Industries Co., Ltd | Thermally responsive switch and method of manufacturing same |
| WO2022059067A1 (en) * | 2020-09-15 | 2022-03-24 | 株式会社生方製作所 | Motor protector |
| JPWO2022059067A1 (en) * | 2020-09-15 | 2022-03-24 | ||
| EP4216406A1 (en) * | 2020-09-15 | 2023-07-26 | Ubukata Industries Co., Ltd. | Motor protector |
| EP4216406A4 (en) * | 2020-09-15 | 2024-05-29 | Ubukata Industries Co., Ltd. | Motor protector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2860517B2 (en) | 1999-02-24 |
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