JPH05128948A - Apparatus for protection against overloading and its manufacture - Google Patents
Apparatus for protection against overloading and its manufactureInfo
- Publication number
- JPH05128948A JPH05128948A JP29117591A JP29117591A JPH05128948A JP H05128948 A JPH05128948 A JP H05128948A JP 29117591 A JP29117591 A JP 29117591A JP 29117591 A JP29117591 A JP 29117591A JP H05128948 A JPH05128948 A JP H05128948A
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- JP
- Japan
- Prior art keywords
- base
- heater
- plate
- pair
- outside
- 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
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、過負荷保護装置に係
り、特に冷凍冷蔵庫等に用いられる密閉型のコンプレッ
サー用モータの過負荷保護装置及びその製造方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overload protection device and, more particularly, to an overload protection device for a hermetic compressor motor used in a refrigerator and a refrigerator, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】近年、冷凍冷蔵庫等に用いられるコンプ
レッサーの過負荷保護装置は安全面よりその寿命が尽き
たとき、電気回路がＯＦＦ状態となるようなフェイルセ
ーフ機能が要求されてきており、例えば特開平２−２６
５１３５号公報が広く知られている。2. Description of the Related Art In recent years, an overload protection device for a compressor used in a refrigerator and a refrigerator is required to have a fail-safe function of turning off an electric circuit when the life of the compressor is exhausted for safety reasons. JP-A-2-26
The 5135 publication is widely known.
【０００３】以下図面を参照しながら上述した過負荷保
護装置の一例について説明する。図６及び図７は従来の
過負荷保護装置を示す。図６及び図７において１は有底
筒状のケース、２はバイメタル板、３ａと３ｂは可動接
点、４は固定接点板ａ、５は固定接点板ｂ、６はヒー
タ、７はヒータ端子板、８はアジャストスクリュウ、９
はザガネ、１０は低融点金属、１１はスプリング、１２
はカバーである。An example of the above-mentioned overload protection device will be described below with reference to the drawings. 6 and 7 show a conventional overload protection device. 6 and 7, 1 is a cylindrical case with a bottom, 2 is a bimetal plate, 3a and 3b are movable contacts, 4 is a fixed contact plate a, 5 is a fixed contact plate b, 6 is a heater, and 7 is a heater terminal plate. , 8 is an adjusting screw, 9
Is a low-melting metal, 10 is a low melting point metal, 11 is a spring, 12
Is a cover.
【０００４】バイメタル板２はザガネ９と低融点金属１
０、アジャストスクリュウ８によって固定接点板ａ、４
と固定接点板ｂ、５とに押圧され、有底筒状ケース１に
固定されている。又スプリング１１によって上方に付勢
されている。ヒータ６は固定接点板ｂ、５に一端を又、
他端をヒータ端子板にそれぞれ溶接されており、バイメ
タル板と電気的に直列に配設されている。The bimetal plate 2 is a countersunk 9 and a low melting point metal 1.
0, fixed contact plates a, 4 by adjusting screw 8
And the fixed contact plates b and 5, and are fixed to the bottomed cylindrical case 1. Further, it is biased upward by the spring 11. The heater 6 has one end connected to the fixed contact plates b and 5,
The other end is welded to the heater terminal plate, respectively, and is electrically arranged in series with the bimetal plate.
【０００５】以上のように構成された過負荷保護装置に
ついて、以下図６，図７を用いてその動作を説明する。The operation of the overload protection device configured as described above will be described below with reference to FIGS. 6 and 7.
【０００６】まず負荷電流が固定接点ａ４から、可動接
点３ｂ，バイメタル板２，可動接点３ａ，固定接点ｂ
５，ヒータ６，ヒータ端子板７の各部を経由して流れ、
バイメタル板２とヒータ６が自己発熱する。回路が過負
荷になると負荷電流が増加して、バイメタル２とヒータ
６の発熱量が増加し、バイメタル板２が設定温度以上と
なって反転動作し、可動接点３ａと３ｂが固定接点ａ
４，固定接点ｂ５より離れて、回路を遮断する。First, the load current changes from the fixed contact a4 to the movable contact 3b, the bimetal plate 2, the movable contact 3a, and the fixed contact b.
5, heater 6, flow through each part of the heater terminal plate 7,
The bimetal plate 2 and the heater 6 self-heat. When the circuit becomes overloaded, the load current increases, the amount of heat generated by the bimetal 2 and the heater 6 increases, and the bimetal plate 2 goes above the set temperature and reverses, and the movable contacts 3a and 3b move to the fixed contact a.
4, away from the fixed contact b5 to cut off the circuit.
【０００７】次に、負荷が冷却されバイメタル２の温度
が設定温度以下になると、バイメタル２が復帰動作し再
び回路を閉じる。このときモータのロック等によって過
負荷状態が続く場合は、バイメタル２は反転，復帰を繰
り返すこととなり、遂には疲労破壊を生じて接点の溶着
を生じる。接点溶着によりヒータ６とバイメタル２に連
続して通電されると低融点金属が溶融して、スプリング
１１の付勢力でザガネ９がアジャストスクリュウ８から
外れると共に、バイメタル板２を強制的に押し上げ、溶
着した接点を引き離して、回路を開き、安全なＯＦＦ状
態を保持されることになる。スプリング１１は接点の溶
着を開離できるよう９．８Ｎ程度の付勢力をバイメタル
板２に与えられている。Next, when the load is cooled and the temperature of the bimetal 2 becomes equal to or lower than the set temperature, the bimetal 2 is restored and the circuit is closed again. At this time, if the overload state continues due to the motor lock or the like, the bimetal 2 is repeatedly inverted and returned, and eventually fatigue fracture occurs and welding of the contacts occurs. When the heater 6 and the bimetal 2 are continuously energized by the contact welding, the low melting point metal is melted and the countersunk 9 is disengaged from the adjusting screw 8 by the urging force of the spring 11, and the bimetal plate 2 is forcibly pushed up and welded. The separated contact is opened, the circuit is opened, and the safe OFF state is maintained. The spring 11 is applied to the bimetal plate 2 with an urging force of about 9.8 N so that the welding of the contacts can be separated.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、この従
来のものにあっては、接点の溶着力がスプリングの付勢
力を上回るような場合には、接点を強制的に開離するこ
とができず十分なフェイルセーフ機能を得にくい。ま
た、フェイルセーフが機能しても有底筒状ケースとカバ
ーの中であり、低融点金属の溶解を外から確認すること
が出来ない。However, in this conventional device, when the welding force of the contact exceeds the urging force of the spring, the contact cannot be forcibly opened and released sufficiently. It is difficult to obtain a proper fail-safe function. Even if the fail-safe functioned, it was in the bottomed cylindrical case and the cover, and the melting of the low melting point metal could not be confirmed from the outside.
【０００９】更に、多種多様なモータ等の負荷に対応す
るためには、多種類のヒータと多種類のバイメタルを組
合わせなければならず、これらを一つの有底筒状ケース
に組み込むため膨大な種類の過負荷保護装置が必要とな
り、生産上在庫が多くなったり、生産の日数が長くかか
る。Further, in order to cope with a wide variety of loads such as motors, it is necessary to combine many kinds of heaters and many kinds of bimetals, which are enormous because they are incorporated in one bottomed cylindrical case. A type of overload protection device is required, resulting in large production inventory and long production days.
【００１０】本発明は、このような欠点を解決するため
になされたものであって、接点の溶着力に関係なく回路
を安全なＯＦＦ状態にすることができる過負荷保護装置
を提供することにある。また、複雑かつ精密な過負荷保
護装置の組立を簡略化した製造方法を提供することにあ
る。The present invention has been made to solve such a drawback, and an object thereof is to provide an overload protection device capable of safely turning off the circuit regardless of the welding force of the contacts. is there. Another object of the present invention is to provide a manufacturing method that simplifies the assembly of a complicated and precise overload protection device.
【００１１】[0011]
【課題を解決するための手段】本発明に係る過負荷保護
装置は第１のベース、固定接点を有する一対の固定端子
板，可動接点を有する熱応動素子，スクリュウ，第２の
ベース，バネ端子，ヒータおよびヒータ端子板で構成さ
れ、前記一対の固定端子板の一方とヒータ端子板とを低
融合金属で接続したものである。また、低融点金属を第
１のベースと第２のベースとを組合わせてなるケースの
外側に設けたものである。An overload protection device according to the present invention comprises a first base, a pair of fixed terminal plates having fixed contacts, a heat responsive element having a movable contact, a screw, a second base and a spring terminal. , A heater and a heater terminal plate, and one of the pair of fixed terminal plates and the heater terminal plate are connected by a low fusion metal. Further, the low melting point metal is provided on the outside of the case formed by combining the first base and the second base.
【００１２】さらに、本発明は少なくともヒータ，ヒー
タ端子板およびヒータと接続された外部接続用バネ端子
を有するユニットＢと、少なくともバイメタル板，接点
機構および一対の固定端子板を有するユニットＡとをそ
れぞれ予め組立てておき、ヒータとバイメタル板が対向
するようにユニットＡとユニットＢを組合わせた後、固
定接点を設けた一対の固定端子板の一方とヒータ端子板
とをケースの外側で低融点金属で接続させるようにした
ものである。Further, the present invention includes a unit B having at least a heater, a heater terminal plate and a spring terminal for external connection connected to the heater, and a unit A having at least a bimetal plate, a contact mechanism and a pair of fixed terminal plates. After pre-assembling and combining the unit A and the unit B so that the heater and the bimetal plate face each other, one of the pair of fixed terminal plates provided with fixed contacts and the heater terminal plate are formed on the outside of the case with a low melting point metal. It was made to connect with.
【００１３】[0013]
【作用】本発明は上記した構成により、ヒータに対抗し
て設けたバイメタル板，低融点金属およびヒータとが接
続されているため、過負荷状態が続きバイメタル板の接
点溶着が起こったような場合には連続通電となり、ヒー
タとバイメタル板の発熱による伝導熱と低融点金属の自
己発熱により低融点金属が溶断し、回路を遮断してしま
うので、接点の溶着強度と関係なく回路をＯＦＦ状態に
保持することができる。According to the present invention, since the bimetal plate, the low melting point metal, and the heater provided opposite to the heater are connected by the above-described structure, when the overload state continues and the contact welding of the bimetal plate occurs. Is continuously energized, the conduction heat generated by the heater and the bimetal plate and the self-heating of the low-melting point metal melts the low-melting point metal to cut off the circuit, so the circuit is turned off regardless of the contact welding strength. Can be held.
【００１４】また、ユニットＡとユニットＢが別々に組
立てられるため、多種多様なモータ等の負荷に対応して
電気容量の異なるヒータとバイメタルの組合わせが容易
に選択でき、過負荷装置としての在庫量も削減できる。
しかも、ユニットＡとユニットＢを接合又は嵌合した
後、低融点金属が取付けられるため、組立を簡単にする
ことができ、多種多様な過負荷保護装置を短い生産日程
で製造することができるものである。Further, since the unit A and the unit B are separately assembled, it is possible to easily select a combination of a heater and a bimetal having different electric capacities corresponding to loads of various kinds of motors, etc. The amount can be reduced.
Moreover, since the low melting point metal is attached after the unit A and the unit B are joined or fitted together, the assembly can be simplified and a wide variety of overload protection devices can be manufactured in a short production schedule. Is.
【００１５】[0015]
【実施例】以下本発明をその実施例を示す図面に基づい
て詳しく説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing the embodiments thereof.
【００１６】図１，図２，図３，図４，図５は本発明の
一実施例に係る過負荷保護装置を示すもので、図１は過
負荷保護装置の電気回路図、図２は過負荷保護装置の断
面図、図３は外観を示す正面図、図４はユニットＡの組
立斜視図、図５はユニットＢの組立斜視図である。1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5 show an overload protection device according to an embodiment of the present invention. FIG. 1 is an electric circuit diagram of the overload protection device, and FIG. FIG. 3 is a sectional view of the overload protection device, FIG. 3 is a front view showing the appearance, FIG. 4 is an assembled perspective view of the unit A, and FIG. 5 is an assembled perspective view of the unit B.
【００１７】図２および図４に示すように、ユニットＡ
は第１のベース１３と一対の固定端子板１４，１５と固
定接点１６，１７と可動接点１９，２０とバイメタル板
１８等の熱応導素子とアジャストスクリュウ（取付手
段）２１とから組立てられている。第１のベース１３は
絶縁性を有する有底容器状の熱可塑性樹脂で一対の固定
端子板１４，１５と一体成形されており、第１のベース
１３の内側に端子板１４，１５の一部が露出し、第１の
ベース１３の外側に固定端子板１４，１５の他端が突出
している。この固定端子板１４，１５は第１のベース１
３の内側に露出した部分に固定接点１６，１７が取付け
られている。バイメタル板１８は略皿状に成形されてお
り、バイメタル板１８の高膨脹側の両端面に溶接された
一対の可動接点１９，２０が固定接点１６，１７を押圧
するように衝合され、バイメタル板１８の中央部を貫通
するアジャストスクリュウ２１で第１のベース１３に螺
合されている。As shown in FIGS. 2 and 4, the unit A
Is assembled from a first base 13, a pair of fixed terminal plates 14 and 15, fixed contacts 16 and 17, movable contacts 19 and 20, a heat conductive element such as a bimetal plate 18, and an adjusting screw (mounting means) 21. There is. The first base 13 is integrally molded with a pair of fixed terminal plates 14 and 15 with a bottomed container-like thermoplastic resin having an insulating property. Inside the first base 13, part of the terminal plates 14 and 15 is formed. Is exposed, and the other ends of the fixed terminal plates 14 and 15 project to the outside of the first base 13. The fixed terminal plates 14 and 15 are the first base 1
Fixed contacts 16 and 17 are attached to the exposed portions of the inside of 3. The bimetal plate 18 is formed in a substantially dish shape, and a pair of movable contacts 19 and 20 welded to both end surfaces of the bimetal plate 18 on the high expansion side are abutted to press the fixed contacts 16 and 17, thereby forming a bimetal plate. An adjusting screw 21 penetrating the central portion of the plate 18 is screwed to the first base 13.
【００１８】図２および図５に示すように、ユニットＢ
は第２のベース２２とバネ端子２３とヒータ２５とヒー
タ端子板２４とから組立てられている。第２のベース２
２は絶縁性を有する有底容器状の熱硬化性樹脂で成形さ
れており、第２のベース２２の外側にヒータ端子板の突
出部２４ａが設けられている。バネ端子２３は第２のベ
ースの突出部２２ａに収納されており、一端を第２のベ
ース２２の内側に露出させて保持されている。As shown in FIGS. 2 and 5, the unit B
Is assembled from a second base 22, a spring terminal 23, a heater 25, and a heater terminal plate 24. Second base 2
Reference numeral 2 is formed of a thermosetting resin having a bottomed container shape having an insulating property, and a protruding portion 24a of the heater terminal plate is provided outside the second base 22. The spring terminal 23 is housed in the projecting portion 22 a of the second base, and one end thereof is exposed and held inside the second base 22.
【００１９】ヒータ端子板２４は一端を第２のベース２
２の内側に、他端を第２のベースの外側に突出するよう
に第２のベース２２に保持されている。ヒータ２５は一
端をバネ端子２３に、他端を第２のベース２２の内側に
位置するヒータ端子板に、それぞれ溶接されている。One end of the heater terminal plate 24 is the second base 2
The second base 22 holds the other end of the second base 22 outside the second base. The heater 25 has one end welded to the spring terminal 23 and the other end welded to the heater terminal plate located inside the second base 22.
【００２０】図３，図４，図５に示すように、別々に組
立てたユニットＡとユニットＢをバイメタル板１８とヒ
ータ２５が対向するように接合又は嵌合した後、ケース
の外側に位置する固定端子板１５の突出部とヒータ端子
部２４の突出部とを低融点金属２６で接続している。こ
の低融点金属の取付方法としては、固定端子板１５の突
出部に設けた穴１５ａとヒータ端子板２４の突出部に設
けた穴２４ａの両方に低融点金属２６を挿入した後、低
融点金属２６の両端をカシメ、さらに高周波等により融
着している。As shown in FIGS. 3, 4, and 5, the separately assembled units A and B are joined or fitted so that the bimetal plate 18 and the heater 25 face each other, and then positioned outside the case. The protruding portion of the fixed terminal plate 15 and the protruding portion of the heater terminal portion 24 are connected by the low melting point metal 26. This low melting point metal can be attached by inserting the low melting point metal 26 into both the hole 15a provided in the protruding portion of the fixed terminal plate 15 and the hole 24a provided in the protruding portion of the heater terminal plate 24, and then the low melting point metal. The both ends of 26 are fused by caulking and further by high frequency or the like.
【００２１】以上のように構成された過負荷保護装置に
ついて、以下その動作を説明する。まず負荷電流はバネ
端子２３，ヒータ２５，ヒータ端子板２４，低融点金属
２６，固定端子板１５，固定接点１７，可動接点２０，
バイメタル板１８，可動接点１９，固定接点１６，固定
接点板１４の回路を流れ、電流の大きさに比例してヒー
タ２５とバイメタル板１８が発熱する。次に過負荷にな
ると電流が増大し、バイメタル板１８の温度が設定値以
上になると反転動作して、接点を切離し、回路を遮断す
る。The operation of the overload protection device configured as described above will be described below. First, the load current is the spring terminal 23, the heater 25, the heater terminal plate 24, the low melting point metal 26, the fixed terminal plate 15, the fixed contact 17, the movable contact 20,
The heater 25 and the bimetal plate 18 generate heat in proportion to the amount of current flowing through the circuit of the bimetal plate 18, the movable contact 19, the fixed contact 16, and the fixed contact plate 14. Next, when the load becomes overloaded, the current increases, and when the temperature of the bimetal plate 18 becomes equal to or higher than the set value, the reversal operation is performed to disconnect the contact and disconnect the circuit.
【００２２】次に負荷が冷却されてバイメタル板の温度
が設定値以下になるとバイメタル板が反転復帰して再び
回路を導通させる。このとき、過負荷状態が続けば前記
バイメタル板が反転復帰を繰り返し遂にはバイタル板が
疲労破壊して接点溶着を生じる。接点溶着によって連続
通電となり、ヒータやバイメタルの熱が低融点金属を溶
断して、回路を安全なＯＦＦ状態に保持する。Next, when the load is cooled and the temperature of the bimetal plate becomes equal to or lower than the set value, the bimetal plate is reversed and restored to make the circuit conductive again. At this time, if the overload state continues, the bimetal plate repeats reversion and return, and finally the vital plate is fatigue fractured to cause contact welding. The welding of the contacts results in continuous energization, and the heat of the heater and the bimetal melts the low melting point metal to keep the circuit in a safe OFF state.
【００２３】以上のように本実施例では、接点溶着強度
に関係なく安全確実に回路をＯＦＦ状態に保持すること
ができるほか、外からその動作の有無を確認することが
できる。また、バイメタル板を有するユニットＡとヒー
タを有するユニットＢを別々に組立てることができ、負
荷に応じて種類の異なるバイメタル板とヒータを予め組
込んだユニットＡとユニットＢを選択し組合せるだけで
所要の過負荷保護装置を提供でき、しかもユニットＡに
組込んだバイメタル板の設定温度は容易に微調整できる
ため、より多種類の過負荷保護装置を提供できるので、
在庫を少なくすることができるとともに生産日程を短縮
できるものである。As described above, in this embodiment, the circuit can be safely and reliably kept in the OFF state regardless of the contact welding strength, and the presence or absence of the operation can be confirmed from the outside. Further, the unit A having a bimetal plate and the unit B having a heater can be separately assembled, and by simply selecting and combining the unit A and the unit B in which different types of bimetal plates and heaters are incorporated in advance according to the load. The required overload protection device can be provided, and since the preset temperature of the bimetal plate incorporated in the unit A can be easily fine-tuned, more types of overload protection devices can be provided.
The inventory can be reduced and the production schedule can be shortened.
【００２４】[0024]
【発明の効果】以上のように本発明は、少なくとも第１
のベース，一対の固定端子板，接点機構，熱応動素子お
よびアジャストスクリュウを有するユニットＡと、少な
くとも第２のベース，ヒータ端子板，ヒータおよび外部
接続用バネ端子を有するユニットＢとで構成される過負
荷保護装置において、一対の固定端子板の一方とヒータ
端子板とを低融点金属で接続したものであるので、接点
の溶着強度に関係なく安全確実に回路をＯＦＦ状態に保
持することができる。また、低融点金属を第１のベース
と第２のベースとを接合又は嵌合してなるケースの外側
に設けたものであるので、容易に低融点金属を取付ける
ことができ、しかも低融点金属の動作を外から確認する
ことができるものである。As described above, the present invention is at least the first aspect.
Unit A having a base, a pair of fixed terminal plates, a contact mechanism, a thermoresponsive element and an adjusting screw, and a unit B having at least a second base, a heater terminal plate, a heater and a spring terminal for external connection. In the overload protection device, one of the pair of fixed terminal plates and the heater terminal plate are connected by the low melting point metal, so that the circuit can be safely and reliably kept in the OFF state regardless of the welding strength of the contacts. .. Further, since the low melting point metal is provided outside the case formed by joining or fitting the first base and the second base, the low melting point metal can be easily attached, and the low melting point metal can be attached. The operation of can be confirmed from the outside.
【００２５】さらに本発明は、第１のベースと一対の固
定端子板と接点機構と熱応動素子と取付手段とを組合わ
せてユニットＡを構成し、別に第２のベースとヒータ端
子板とヒータと外部接続用バネ端子を組合わせてユニッ
トＢを構成し、ユニットＡとユニットＢを熱応動素子と
ヒータとが対向するように組合わせた後、ケースの外側
に突出した固定端子板の一方とヒータ端子板とを低融点
金属で接続しているため、多種多様なヒータと熱応動素
子の組合わせが容易に選択でき、在庫を低減することが
できる。しかも、容易に低融点金属を取付けることがで
き、製造時間を大幅に低減することができるものであ
る。Further, according to the present invention, the unit A is constructed by combining the first base, the pair of fixed terminal plates, the contact mechanism, the thermoresponsive element and the mounting means, and separately the second base, the heater terminal plate and the heater. And a spring terminal for external connection are combined to form a unit B, and the units A and B are combined so that the heat responsive element and the heater face each other, and then one of the fixed terminal plates protruding to the outside of the case. Since the heater terminal plate is connected with the low melting point metal, a wide variety of combinations of the heater and the thermoresponsive element can be easily selected, and the inventory can be reduced. Moreover, the low melting point metal can be easily attached, and the manufacturing time can be greatly reduced.
【図１】本発明の一実施例における過負荷保護装置とコ
ンプレッサーモータの回路図FIG. 1 is a circuit diagram of an overload protection device and a compressor motor according to an embodiment of the present invention.
【図２】本発明の一実施例における過負荷保護装置の断
面図FIG. 2 is a sectional view of an overload protection device according to an embodiment of the present invention.
【図３】図２の過負荷保護装置の外観正面図3 is an external front view of the overload protection device of FIG.
【図４】図２の過負荷保護装置のユニットＡの組立斜視
図4 is an assembled perspective view of a unit A of the overload protection device of FIG.
【図５】図２の過負荷保護装置のユニットＢの組立斜視
図5 is an assembled perspective view of a unit B of the overload protection device of FIG.
【図６】従来の過負荷保護装置の断面図FIG. 6 is a sectional view of a conventional overload protection device.
【図７】図５のバイメタルを外した平面図FIG. 7 is a plan view with the bimetal of FIG. 5 removed.
１３ 第１のベース １４，１５ 固定端子板 １６，１７ 固定接点 １８ バイメタル板 １９，２０ 可動接点 ２１ アジャストスクリュウ（取付手段） ２２ 第２のベース ２３ バネ端子 ２４ ヒータ端子板 ２５ ヒータ ２６ 低融点金属 13 1st base 14,15 Fixed terminal board 16,17 Fixed contact 18 Bimetal board 19,20 Movable contact 21 Adjust screw (attaching means) 22 Second base 23 Spring terminal 24 Heater terminal board 25 Heater 26 Low melting point metal
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 隆 大阪府東大阪市高井田本通３丁目22番地 松下冷機株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Tanaka 3-22, Takaidahondori, Higashiosaka-shi, Osaka Prefecture Matsushita Refrigerating Machinery Co., Ltd.
Claims (3)
前記第１のベースの内側に一部を露出させると共に前記
第１のベースの外側に一端を突出させるように前記第１
のベースと一体に成形された一対の固定端子板と、前記
一対の固定端子板が前記第１のベースの内側に露出する
部分に設けられた固定接点と、皿状に成形され両端に一
対の可動接点を有する熱応動素子と、前記熱応動素子上
の一対の可動接点が前記一対の端子板上の固定接点を押
圧するように前記熱応動素子を前記第１のベースに結合
する取付手段と、第１のベースと組合わされてケースを
形成する樹脂製の有底容器状の第２のベースと、前記第
２のベースの内側に保持され一部が外部と接続されるバ
ネ端子と、前記バネ端子に一端を接続されたヒータと、
前記ヒータの他端に接続され前記第２のベースの外側に
一端を出すように設けられたヒータ端子板とで構成さ
れ、前記一対の固定端子板の一方と前記ヒータ端子板と
を低融点金属で接続したことを特徴とする過負荷保護装
置。1. A bottomed container-shaped first base made of resin,
The first base is partially exposed to the outside and the one end is projected to the outside of the first base.
A pair of fixed terminal plates integrally formed with the base, fixed contacts provided at a portion where the pair of fixed terminal plates are exposed to the inside of the first base, and a pair of fixed terminal plates formed in a dish shape at both ends. A thermal responsive element having a movable contact, and a mounting means for coupling the thermal responsive element to the first base so that a pair of movable contacts on the thermal responsive element press a fixed contact on the pair of terminal plates. A second base in the shape of a container with a bottom made of resin that is combined with the first base to form a case; a spring terminal held inside the second base and partially connected to the outside; A heater whose one end is connected to the spring terminal,
A heater terminal plate connected to the other end of the heater so as to extend one end outside the second base, and one of the pair of fixed terminal plates and the heater terminal plate is made of a low melting point metal. An overload protection device characterized by being connected with.
スとを組合わせてなるケースの外側に設けたことを特徴
とする請求項１記載の過負荷保護装置。2. The overload protection device according to claim 1, wherein the low melting point metal is provided on the outside of the case formed by combining the first base and the second base.
前記第１のベースの内側に一部を露出させると共に前記
第１のベースの外側に一端を突出させるように前記第１
のベースと一体に成形された一対の固定端子板と、前記
１対の固定端子板が前記第１のベースの内側に露出する
部分に設けられた固定接点と、皿状に成形され両端に可
動接点を有する熱応動素子と、前記熱応動素子上の一対
の可動接点が前記一対の端子板上の固定接点を押圧する
ように前記熱応動素子を前記第１のベースに結合する取
付手段とを組合わせてユニットＡを構成し、第１のベー
スと組合わされてケースを形成する樹脂製の有底容器状
の第２のベースと、前記第２のベースの内側に保持され
一部が外部と接続されるバネ端子と、前記バネ端子に一
端を接続されたヒータと、前記ヒータの他端に接続され
前記第２のベースの外側に一端を出すように設けられた
ヒータ端子板とを組合わせてユニットＢを構成し、前記
ユニットＡと前記ユニットＢを前記熱応動素子と前記ヒ
ータとが対向するように組合わせた後、前記一対の固定
端子板の一方と前記ヒータ端子板とを低融点金属で接続
してなる過負荷保護装置の製造方法。3. A resin-based bottomed container-shaped first base,
The first base is partially exposed to the outside and the one end is projected to the outside of the first base.
Pair of fixed terminal plates integrally formed with the base, fixed contacts provided at a portion where the pair of fixed terminal plates are exposed to the inside of the first base, and a dish-shaped movable contact at both ends. A thermal responsive element having a contact point; and a mounting means for coupling the thermal responsive element to the first base so that a pair of movable contacts on the thermal responsive element press a fixed contact on the pair of terminal plates. A second base in the shape of a container with a bottom made of resin, which is combined with the first base to form a case when combined with the first base, and a part of the second base which is held inside the second base and is external. A combination of a spring terminal to be connected, a heater whose one end is connected to the spring terminal, and a heater terminal plate which is connected to the other end of the heater and is provided so as to project one end outside the second base. Unit B to form the unit A and the unit A Manufacture of an overload protection device in which the knit B is assembled so that the heat responsive element and the heater face each other, and then one of the pair of fixed terminal plates and the heater terminal plate are connected by a low melting point metal. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03291175A JP3088522B2 (en) | 1991-11-07 | 1991-11-07 | Overload protection device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03291175A JP3088522B2 (en) | 1991-11-07 | 1991-11-07 | Overload protection device and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05128948A true JPH05128948A (en) | 1993-05-25 |
| JP3088522B2 JP3088522B2 (en) | 2000-09-18 |
Family
ID=17765429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03291175A Expired - Fee Related JP3088522B2 (en) | 1991-11-07 | 1991-11-07 | Overload protection device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3088522B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6496339B2 (en) * | 2000-05-23 | 2002-12-17 | Hitachi, Ltd. | Electric power supply device and equipment using thereof |
| US7301434B1 (en) * | 2006-05-12 | 2007-11-27 | Sensata Technologies, Inc. | Thermally responsive electrical switch |
-
1991
- 1991-11-07 JP JP03291175A patent/JP3088522B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6496339B2 (en) * | 2000-05-23 | 2002-12-17 | Hitachi, Ltd. | Electric power supply device and equipment using thereof |
| US7301434B1 (en) * | 2006-05-12 | 2007-11-27 | Sensata Technologies, Inc. | Thermally responsive electrical switch |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3088522B2 (en) | 2000-09-18 |
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