JPH0638349Y2 - Thermal protector - Google Patents
Thermal protectorInfo
- Publication number
- JPH0638349Y2 JPH0638349Y2 JP1986077323U JP7732386U JPH0638349Y2 JP H0638349 Y2 JPH0638349 Y2 JP H0638349Y2 JP 1986077323 U JP1986077323 U JP 1986077323U JP 7732386 U JP7732386 U JP 7732386U JP H0638349 Y2 JPH0638349 Y2 JP H0638349Y2
- Authority
- JP
- Japan
- Prior art keywords
- resin block
- movable electrode
- contact
- fixed electrode
- fitting portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Thermally Actuated Switches (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は小型電気機器の焼損防止用安全素子等として使
用されるサーマルプロテクタに関するものである。DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a thermal protector used as a safety element for preventing burnout of a small electric device.
従来の技術 サーマルプロテクタは先端にそれぞれ接点を有する可動
電極と固定電極とを対向接触させて容器内に収納した構
造になっており、蛍光灯安定器，トランス，モータ等の
小型電気機器に取り付けられ、その温度が異常に上昇し
たり、過電流が流れたりしたとき、可動電極が固定電極
から離間して流れる電流を遮断することにより、小型電
気機器を安全に保護するという機能を有している。2. Description of the Related Art A thermal protector has a structure in which a movable electrode and a fixed electrode, each having a contact at its tip, are housed in a container with the electrodes facing each other and facing each other. , When the temperature rises abnormally or an overcurrent flows, the movable electrode separates from the fixed electrode and interrupts the flowing current, which has the function of safely protecting small electric devices. .
従来、このサーマルプロテクタの一例として、可動電極
と固定電極とを対向接触させて単一の樹脂ブロックに植
設して一体化したマウント体を容器内に収納したものが
知られている。そのマウント体を得るにあたっては、可
動電極と固定電極とを一定の間隔で樹脂ブロックにて一
体化し、その両電極間に低電圧の接点開閉電流を通じ、
両電極が正常な接点開閉となるように、可動電極の曲げ
整形を行い、再び両電極間に低電圧の接点開閉電流を通
じ、もし両電極が正常な接点開閉を行わなければ、再度
可動電極の曲げ整形を行うことにより、接点開閉に必要
とされる接点コンタクト圧力を得ている。つまり、従来
は電極間の通電と可動電極の曲げ整形作業とを繰り返し
行うことにより、接点開閉に必要とされる接点コンタク
ト圧力を得ている。Conventionally, as an example of this thermal protector, there is known one in which a mount body in which a movable electrode and a fixed electrode are opposed to each other and are planted in a single resin block so as to be integrated is housed in a container. In obtaining the mount body, the movable electrode and the fixed electrode are integrated with a resin block at a constant interval, and a low-voltage contact opening / closing current is passed between both electrodes,
The movable electrode is bent and shaped so that both electrodes open and close normally, and a low-voltage contact opening and closing current is passed between both electrodes again.If both electrodes do not open and close normally, the movable electrode By performing bending shaping, the contact contact pressure required for opening and closing the contact is obtained. That is, conventionally, the contact contact pressure required for opening and closing the contact is obtained by repeatedly performing the energization between the electrodes and the bending and shaping work of the movable electrode.
考案が解決しようとする問題点 しかし、かかる可動電極の曲げ整形作業は熟練を要し、
しかもスナップアクション熱応動メタル素子に特性変化
を与えないよう細心の配慮を払わなければならない作業
であるので、組立ラインとの一体化が難しく、このため
マウント加工時間の増大や，接点開閉良否の歩留り低下
などによりコストアップを招くという問題点があった。However, the bending and shaping work of the movable electrode requires skill,
Moreover, since it is a work that requires careful consideration so as not to change the characteristics of the snap action thermo-responsive metal element, it is difficult to integrate it with the assembly line, which increases the mount processing time and yield of the contact open / close. There is a problem that the cost is increased due to the decrease.
本考案はこのような問題点を解決するためになされたも
のであり、マウント加工を容易化し、歩留りを向上し
て、コストダウンを図り、また電極開閉の品質の安定化
を図ることのできるサーマルプロテクタを提供するもの
である。The present invention has been made in order to solve such a problem, and is capable of facilitating the mounting process, improving the yield, reducing the cost, and stabilizing the quality of the electrode opening / closing. It provides a protector.
問題点を解決するための手段 このような問題点を解決するために、本考案のサーマル
プロテクタは、一端部に接点を有する固定電極の他端部
を第１の樹脂ブロックに植設する一方、一端部に接点を
有するスナップアクション熱応動メタル素子を備えた可
動電極の他端部を第２の樹脂ブロックに植設し、前記固
定電極と前記可動電極との対向面側に位置する前記第１
の樹脂ブロックの側面には開口部の幅が内部の幅より狭
い凹部、または凸部からなる第１の嵌合部を形成し、か
つ前記対向面側に位置する前記第２の樹脂ブロックの側
面には前記凹部にスライド嵌合する凸部、または前記第
１の嵌合部の凸部がスライド嵌合しかつ開口部の幅が内
部の幅より狭い凹部からなる第２の嵌合部を形成し、前
記第１の嵌合部の凹部または凸部に前記第２の嵌合部の
凸部または凹部をスライド嵌合して固定することによ
り、前記第１の樹脂ブロックと第２の樹脂ブロックとを
一体化して前記固定電極の接点と前記可動電極の接点と
を対向接触させたマウント体を構成し、このマウント体
を容器内に収納したものである。Means for Solving the Problems In order to solve such problems, the thermal protector according to the present invention is arranged such that the other end of the fixed electrode having a contact at one end is planted in the first resin block. The other end of the movable electrode provided with a snap action thermo-responsive metal element having a contact at one end is planted in the second resin block, and the first electrode is located on the opposing surface side of the fixed electrode and the movable electrode.
On the side surface of the second resin block, the first fitting portion having a concave portion or a convex portion having an opening width narrower than the inner width is formed on the side surface of the second resin block. Has a second fitting portion formed with a convex portion that slide-fits in the concave portion, or a convex portion of the first fitting portion that slide-fits and the opening has a narrower width than the internal width. Then, the first resin block and the second resin block are fixed by slidingly fixing the convex portion or concave portion of the second fitting portion to the concave portion or convex portion of the first fitting portion. Is integrated to form a mount body in which the contact of the fixed electrode and the contact of the movable electrode face each other, and the mount body is housed in a container.
作用 第１の樹脂ブロックと第２の樹脂ブロックとが分離可能
な構造になっているので、分離した状態で可動電極に対
して正常な電極開閉を行うための適正なコンタクト圧力
を容易に設定することができる。Action Since the first resin block and the second resin block are separable from each other, it is possible to easily set an appropriate contact pressure for normally opening and closing the movable electrode in the separated state. be able to.
実施例 以下、本考案の一実施例について図面を用いて説明す
る。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
第１図は本考案実施例のサーマルプロテクタの一部破断
側面図、第２図は同じく一部破断正面図、第３図〜第５
図は固定電極の正面図、側面図および底面図、第６図〜
第８図は可動電極の正面図、側面図および底面図であ
る。1 is a partially cutaway side view of a thermal protector according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view thereof, and FIGS.
The figures are a front view, a side view and a bottom view of the fixed electrode, and FIG.
FIG. 8 is a front view, a side view and a bottom view of the movable electrode.
第１図および第２図に示すように、本考案実施例のサー
マルプロテクタは容器１内に固定電極と可動電極とを対
向接触させて収納した構造になっている。固定電極は、
第３図および第４図に示すように固定電極プレート２の
先端部に、銀系接点４を溶接した接点プレート３を溶接
している。固定電極プレート２は耐熱性の第１の樹脂ブ
ロック５に植設して一体化している。固定電極プレート
２の一部に形成された電極端子６にはリード線７を溶接
している。また、可動電極は、第６図および第７図に示
すように可動電極プレート８の先端部に、銀系接点10を
溶接したスナップアクション熱応動メタル素子９を、銀
系接点10の先端面と可動電極プレート８の背面との距離
Ｄが一定となるように溶接している。可動電極プレート
８は耐熱性の第２の樹脂ブロック11に植設して一体化し
ている。電極端子12にはリード線13を溶接している。As shown in FIGS. 1 and 2, the thermal protector according to the embodiment of the present invention has a structure in which a fixed electrode and a movable electrode are housed in a container 1 so as to face each other. The fixed electrode is
As shown in FIGS. 3 and 4, a contact plate 3 having a silver-based contact 4 welded thereto is welded to the tip of the fixed electrode plate 2. The fixed electrode plate 2 is planted and integrated with the heat-resistant first resin block 5. A lead wire 7 is welded to the electrode terminal 6 formed on a part of the fixed electrode plate 2. As shown in FIGS. 6 and 7, the movable electrode includes a snap action thermo-responsive metal element 9 in which a silver-based contact 10 is welded to the tip of the movable electrode plate 8 and a tip surface of the silver-based contact 10. Welding is performed so that the distance D from the back surface of the movable electrode plate 8 is constant. The movable electrode plate 8 is planted and integrated with the heat resistant second resin block 11. A lead wire 13 is welded to the electrode terminal 12.
そして、固定電極と可動電極との対向面側に位置する第
１と第２の樹脂ブロック5,11の側面には、第５図および
第８図に示すように、開口部の幅が内部の幅より狭い凹
部14からなる第１の嵌合部と凸部15からなる第２の嵌合
部をそれぞれ形成している。Then, as shown in FIGS. 5 and 8, on the side surfaces of the first and second resin blocks 5 and 11 located on the side where the fixed electrode and the movable electrode face each other, as shown in FIGS. A first fitting portion consisting of a concave portion 14 narrower than the width and a second fitting portion consisting of a convex portion 15 are formed respectively.
なお、前記距離Ｄについては各温度ランク毎に正常な接
点開閉となることを前もって確認された指定寸法を採用
するものである。As for the distance D, a designated dimension which is confirmed in advance that normal contact opening / closing is performed for each temperature rank is adopted.
さらに、第１の樹脂ブロック５の凹部14に第２の樹脂ブ
ロック11の凸部15をスライド嵌合して固定することによ
りその両者を一体化して固定電極と可動電極とを対向さ
せて接点4,10を接触させたマウント体を構成している。
そして、このマウント体を容器１内に収納し、その容器
の開口部に良好な電気絶縁性および耐熱性を有する接着
剤例えばエポキシ系接着剤16を充填して、開口部を封着
している。Furthermore, by slidingly fitting and fixing the convex portion 15 of the second resin block 11 to the concave portion 14 of the first resin block 5, the both are integrated so that the fixed electrode and the movable electrode face each other, and the contact 4 , 10 are in contact with each other to form a mount body.
Then, the mount body is housed in a container 1, and the opening of the container is filled with an adhesive having good electric insulation and heat resistance, for example, an epoxy adhesive 16 to seal the opening. .
このような構成を有するサーマルプロテクタは、固定電
極と可動電極とを単一の樹脂ブロックにて一体化した従
来構造のサーマルプロテクタに比べて、固定電極と可動
電極とを別々の樹脂ブロックに植設した二分割構造を採
っているので、可動電極プレート８へのスナップアクシ
ョン熱応動メタル素子９の溶接固定がきわめて簡単とな
るとともに、可動電極の接点10の先端面と可動電極プレ
ート８の背面との距離Ｄに対し、チャタリングを生じな
い正常な接点開閉となる指定の距離を与えて可動電極の
加工をすることができるため、マウント整形加工が容易
となり、歩留りが向上してコストダウンが図れ、また接
点開閉品質が安定化する等のすぐれた効果を有するもの
である。In the thermal protector having such a configuration, the fixed electrode and the movable electrode are planted in separate resin blocks as compared with the conventional thermal protector in which the fixed electrode and the movable electrode are integrated by a single resin block. Since the two-piece structure is adopted, the snap action thermoresponsive metal element 9 can be welded and fixed to the movable electrode plate 8 very easily, and the tip surface of the contact 10 of the movable electrode and the back surface of the movable electrode plate 8 can be easily fixed. Since the movable electrode can be processed by giving a specified distance to the distance D that allows normal contact opening and closing without chattering, the mount shaping process is facilitated, the yield is improved, and the cost is reduced. It has excellent effects such as stabilization of contact opening / closing quality.
上記実施例構造のサーマルプロテクタを多数個製作して
マウント加工時間工数，完成品特性，歩留りについて上
記従来構造のサーマルプロテクタと比較したところ、下
表に示すとおりの結果となった。A large number of thermal protectors having the above-described structure were manufactured and compared with the thermal protector having the above-described conventional structure in terms of mounting processing time, finished product characteristics, and yield. The results are shown in the table below.
ただし、表中、は平均値、σはバラツキを示す。 However, in the table, indicates the average value and σ indicates the variation.
上表から明らかなように、本考案のサーマルプロテクタ
は従来のサーマルプロテクタに比べて、マウント加工時
間工数が1/5、完成品の動作温度のバラツキが約1/2にそ
れぞれ減少し、接点開閉歩留りが6.5％向上するという
大幅な改良効果が得られた。As can be seen from the table above, the thermal protector of the present invention has 1/5 the mount processing time and the variation of the operating temperature of the finished product is reduced to about 1/2 compared with the conventional thermal protector, and the contact opening / closing A significant improvement effect was obtained that the yield was improved by 6.5%.
なお、上記実施例では固定電極側の第１の樹脂ブロック
に凹部からなる第１の嵌合部を、可動電極側の第２の樹
脂ブロックに凸部からなる第２の嵌合部をそれぞれ形成
した場合について説明したが、前記第１の樹脂ブロック
に凸部からなる第１の嵌合部を、前記第２の樹脂ブロッ
クに凹部からなる第２の嵌合部をそれぞれ形成してもよ
いことはいうまでもない。In the above embodiment, the first fitting portion formed of a concave portion is formed in the first resin block on the fixed electrode side, and the second fitting portion formed of a convex portion is formed in the second resin block on the movable electrode side. Although the case has been described, the first fitting portion formed of a convex portion may be formed on the first resin block, and the second fitting portion formed of a concave portion may be formed on the second resin block. Needless to say.
考案の効果 以上説明したように、本考案のサーマルプロテクタは従
来のものに比べて、マウント加工時間工数を削減するこ
とができ、また歩留りも向上することができ、さらにマ
ウント加工を簡単にし得て組立ラインとの一体化が可能
となるため、コストダウンを図ることができるうえ、動
作温度のバラツキを減少することができて、品質向上を
図ることができる等のすぐれた効果を有するサーマルプ
ロテクタを提供することができるものである。Effect of the Invention As described above, the thermal protector of the present invention can reduce the number of man-hours for mounting processing, improve the yield, and simplify the mounting processing as compared with the conventional one. Since it can be integrated with the assembly line, it is possible to reduce costs, reduce variations in operating temperature, and improve the quality of thermal protectors. What can be provided.
第１図は本考案の一実施例であるサーマルプロテクタの
一部破断側面図、第２図は同じく一部破断正面図、第３
図、第４図および第５図は固定電極の正面図、側面図お
よび底面図、第６図、第７図および第８図は可動電極の
正面図、側面図および底面図である。 １……容器、２……固定電極プレート、３……接点プレ
ート、4,10……接点、５……第１の樹脂ブロック、6,12
……電極端子、7,13……リード線、８……可動電極プレ
ート、９……スナップアクション熱応動メタル素子、11
……第２の樹脂ブロック、14……凹部、15……凸部、16
……接着剤。FIG. 1 is a partially cutaway side view of a thermal protector according to an embodiment of the present invention, and FIG. 2 is a partially cutaway front view of the same.
FIGS. 4, 5 and 6 are a front view, a side view and a bottom view of the fixed electrode, and FIGS. 6, 7 and 8 are a front view, a side view and a bottom view of the movable electrode. 1 ... Container, 2 ... Fixed electrode plate, 3 ... Contact plate, 4,10 ... Contact, 5 ... First resin block, 6,12
...... Electrode terminal, 7,13 ...... Lead wire, 8 ...... Movable electrode plate, 9 ...... Snap action thermo-responsive metal element, 11
…… Second resin block, 14 …… Recessed part, 15 …… Convex part, 16
……adhesive.
Claims (1)
第１の樹脂ブロックに植設する一方、一端部に接点を有
するスナップアクション熱応動メタル素子を備えた可動
電極の他端部を第２の樹脂ブロックに植設し、前記固定
電極と前記可動電極との対向面側に位置する前記第１の
樹脂ブロックの側面には開口部の幅が内部の幅より狭い
凹部、または凸部からなる第１の嵌合部を形成し、かつ
前記対向面側に位置する前記第２の樹脂ブロックの側面
には前記凹部にスライド嵌合する凸部、または前記第１
の嵌合部の凸部がスライド嵌合しかつ開口部の幅が内部
の幅より狭い凹部からなる第２の嵌合部を形成し、前記
第１の嵌合部の凹部または凸部に前記第２の嵌合部の凸
部または凹部をスライド嵌合して固定することにより、
前記第１の樹脂ブロックと第２の樹脂ブロックとを一体
化して前記固定電極の接点と前記可動電極の接点とを対
向接触させたマウント体を構成し、このマウント体を容
器内に収納したことを特徴とするサーマルプロテクタ。1. The other end of a movable electrode having a snap action thermoresponsive metal element having a contact at one end while the other end of a fixed electrode having a contact at one end is planted in a first resin block. Is planted in a second resin block, and a concave portion or a convex portion in which the width of the opening is narrower than the inner width is formed on the side surface of the first resin block located on the opposing surface side of the fixed electrode and the movable electrode. A first fitting portion formed of a portion, and a convex portion slidably fitted into the concave portion on the side surface of the second resin block located on the facing surface side, or the first fitting portion.
Forming a second fitting portion formed of a concave portion in which the convex portion of the fitting portion is slidably fitted and the width of the opening portion is narrower than the inner width, and the concave portion or the convex portion of the first fitting portion is provided with the above-mentioned By slidingly fitting and fixing the convex portion or the concave portion of the second fitting portion,
A mount body in which the first resin block and the second resin block are integrated with each other so that the contact point of the fixed electrode and the contact point of the movable electrode face each other, and the mount body is housed in a container. Is a thermal protector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986077323U JPH0638349Y2 (en) | 1986-05-22 | 1986-05-22 | Thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986077323U JPH0638349Y2 (en) | 1986-05-22 | 1986-05-22 | Thermal protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62191044U JPS62191044U (en) | 1987-12-04 |
| JPH0638349Y2 true JPH0638349Y2 (en) | 1994-10-05 |
Family
ID=30925219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986077323U Expired - Lifetime JPH0638349Y2 (en) | 1986-05-22 | 1986-05-22 | Thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638349Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5242372U (en) * | 1975-09-20 | 1977-03-25 | ||
| JPS5864719A (en) * | 1981-10-14 | 1983-04-18 | 明星電気株式会社 | Method of producing contact spring set |
-
1986
- 1986-05-22 JP JP1986077323U patent/JPH0638349Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5242372U (en) * | 1975-09-20 | 1977-03-25 | ||
| JPS5864719A (en) * | 1981-10-14 | 1983-04-18 | 明星電気株式会社 | Method of producing contact spring set |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62191044U (en) | 1987-12-04 |
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