JPH03127422A - Thermal protector - Google Patents
Thermal protectorInfo
- Publication number
- JPH03127422A JPH03127422A JP26320989A JP26320989A JPH03127422A JP H03127422 A JPH03127422 A JP H03127422A JP 26320989 A JP26320989 A JP 26320989A JP 26320989 A JP26320989 A JP 26320989A JP H03127422 A JPH03127422 A JP H03127422A
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- movable
- welded
- fixed electrode
- container
- 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
- 230000001012 protector Effects 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 abstract description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 8
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Landscapes
- Thermally Actuated Switches (AREA)
- Fuses (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は各種電気機器、例えばモータまたは螢光灯安定
器等に用いられ、異常時の発熱および過大電流等による
電気機器の焼損防止のためのサーマルプロテクタ、特に
小型のサーマルプロテクタに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in various electrical equipment, such as motors or fluorescent lamp ballasts, and is used as a thermal protection device to prevent burnout of electrical equipment due to abnormal heat generation and excessive current. The present invention relates to a protector, particularly a small thermal protector.
従来の技術 従来、小型のサーマルプロテクタは第2図(a)。Conventional technology A conventional small thermal protector is shown in Fig. 2(a).
tb+に示すような構成を有している。すなわち、先端
部に可動接点2を溶接した反転形トリメタル3を可動電
極プレート1の一端部1aに溶接してなる可動電極体と
、先端部に固定接点6を溶接した接点プレート7を固定
電極プレート5の一端部5aに溶接してなる固定電極体
とを、可動接点2と固定接点6が所定の接点圧力で接触
するように対向して設け、可動電極プレート1と固定電
極プレート5のほぼ中央部を樹脂からなる絶縁ブロック
9に埋設して固着支持し、可動電極プレート1の他端部
1bに可動側被覆リード線4を溶接し、固定電極プレー
ト5の他端部5bに固定側被覆リード線8を溶接してマ
ウント体を構成する。そして、このマウント体は一端に
開口部を有する樹脂からなる容器IOに収納し、容器1
0の開口部から可動側被覆リード線4と固定側被覆リー
ド線8を導出し、容器10の開口部を樹脂からなる充填
剤11にて封止されている。It has a configuration as shown in tb+. That is, a movable electrode body is formed by welding an inverted trimetal 3 with a movable contact 2 welded to its tip to one end 1a of a movable electrode plate 1, and a fixed electrode plate includes a contact plate 7 with a fixed contact 6 welded to its tip. A fixed electrode body welded to one end 5a of the movable electrode plate 1 and the fixed electrode plate 5 is provided facing each other so that the movable contact 2 and the fixed contact 6 are in contact with each other with a predetermined contact pressure, and a fixed electrode body is welded to one end portion 5a of the movable electrode plate 1 and the fixed electrode plate 5. The movable covered lead wire 4 is welded to the other end 1b of the movable electrode plate 1, and the fixed covered lead wire 4 is welded to the other end 5b of the fixed electrode plate 5. The wire 8 is welded to form a mount body. Then, this mount body is stored in a container IO made of resin having an opening at one end.
The movable covered lead wire 4 and the fixed covered lead wire 8 are led out from the opening of the container 10, and the opening of the container 10 is sealed with a filler 11 made of resin.
このような構成を有するサーマルプロテクタは、モータ
等に取り付けられ、異常時の温度過昇および過大電流に
感応して、反転形トリメタル3が反転復帰動作を行い、
可動接点2と固定接点6の開閉を行ってモータ等の焼損
を防止する機能を持っている。The thermal protector having such a configuration is attached to a motor, etc., and in response to an abnormal temperature rise and excessive current, the reversible trimetal 3 performs an inverting return operation.
It has the function of opening and closing the movable contact 2 and fixed contact 6 to prevent burnout of the motor, etc.
発明が解決しようとする課題
この種のサーマルプロテクタは、特にモータや蛍光灯安
定器等に使用する場合、大電流に耐え得ることが必要で
ある。しかし、かかる構造でもって小型化した場合、容
器の容積が小さくなるために、大電流における通電時の
強烈な接点間アークによるアーク熱で容器の内圧が増大
する結果、容器が破損して容器外へ発火することを防止
することができないという重大な欠点があった。Problems to be Solved by the Invention This type of thermal protector must be able to withstand large currents, especially when used in motors, fluorescent lamp ballasts, and the like. However, when this structure is miniaturized, the volume of the container becomes smaller, and as a result, the internal pressure of the container increases due to the arc heat caused by the intense arc between the contacts when energizing at a large current, causing the container to break and cause the container to leak out. A serious drawback was that it was impossible to prevent the fire from igniting.
本発明は小型構造に伴うこのような問題点を解決するた
めになされたもので、モータや蛍光灯安定器等に使用し
ても発火等を引き起こすおそれのない安全性の高い小型
のサーマルプロテクタを提供するものである。The present invention was made to solve these problems associated with a compact structure, and provides a highly safe compact thermal protector that will not cause a fire when used in motors, fluorescent lamp ballasts, etc. This is what we provide.
課題を解決するための手段
本発明のサーマルプロテクタは、可動電極プレートを備
えた可動電極体と、固定電極プレートを備えた固定電極
体とを対向して設け、かつ前記可動電極プレートと前記
固定電極プレートとを絶縁ブロックで一体化したマウン
ト体を容器内に収納し、前記可動電極プレートと前記固
定電極プレートのうち少なくとも一方の一部に電流ヒユ
ーズ機能を持つくびれ部を形威し、このくびれ部を前記
絶縁ブロックに埋設した構成を有している。Means for Solving the Problems The thermal protector of the present invention is provided with a movable electrode body having a movable electrode plate and a fixed electrode body having a fixed electrode plate facing each other, and wherein the movable electrode plate and the fixed electrode A mount body in which the plate is integrated with an insulating block is housed in a container, and at least one of the movable electrode plate and the fixed electrode plate is formed with a constriction having a current fuse function. is embedded in the insulating block.
作用
本発明はサーマルプロテクタに大電流が流れると、電流
ヒユーズ機能を持つくびれ部が溶断するので、接点間の
強烈なアークの発生を防止することができる。ところが
、くびれ部の溶断時にはくびれ部が形成されている電極
プレートの両端部間に爆発的なアークが発生する。しか
し、このアークは絶縁ブロックで封じ込められる。その
結果、容器外への発火を防止することができる。Effect of the Invention In the present invention, when a large current flows through the thermal protector, the constricted portion having a current fuse function is fused, so that it is possible to prevent the occurrence of intense arcing between the contacts. However, when the constriction is fused, an explosive arc is generated between both ends of the electrode plate where the constriction is formed. However, this arc is contained by an insulating block. As a result, ignition outside the container can be prevented.
実施例
以下、本発明の一実施例について図面を用いて説明する
。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.
第1図+a)、 (blに示すように、本発明実施例の
サーマルプロテクタは、先端部に可動接点2を溶接した
反転形トリメタル3からなるスナップアクシーン型熱応
動素子を、中央部にヒユーズ機能を持つくびれ部ICを
設けた可動電極プレート12の一端部12aに溶接して
なる可動電極体と、先端部に固定接点6を溶接した接点
プレート7を固定電極プレート5の一端部5aに溶接し
てなる固定電極体とを、可動接点2と固定接点6が所定
の接点圧力で接触するように対向して設けている。As shown in Figure 1+a) and (bl), the thermal protector according to the embodiment of the present invention has a snap-axle thermally responsive element made of an inverted trimetal 3 with a movable contact 2 welded to its tip, and a fuse in the center. A movable electrode body is welded to one end 12a of a movable electrode plate 12 provided with a functional constriction IC, and a contact plate 7, which has a fixed contact 6 welded to its tip, is welded to one end 5a of the fixed electrode plate 5. The movable contact 2 and the fixed electrode body 6 are provided facing each other so that the movable contact 2 and the fixed contact 6 are in contact with each other with a predetermined contact pressure.
可動電極プレート12と固定電極プレート5のほぼ中央
部は樹脂からなる絶縁ブロック9に埋設されて一体化さ
れている。この場合可動電極プレート12の中央部に電
流ヒユーズ機能を持つくびれ部12cを設け、このくび
れ部を樹脂ブロック9内の中央部に位置するように埋設
している。可動電極プレート12の他端部12bには可
動側被覆リード線4を溶接し、また、固定電極プレート
5の他端部5bには固定側被覆リード線8を溶接してい
る。以上のようにしてマウント体が構成されている。そ
して、このマウント体は一端に開口部を有する樹脂から
なる長さ16.4mn+、幅6.OM厚さ3.1閣の容
器10内に収納し、容器10の開口部から可動側被覆リ
ード線4と固定側被覆リード線8を導出し、容器10の
開口部をエポキシ樹脂等からなる充填剤11にて封止し
ている。Approximately central portions of the movable electrode plate 12 and the fixed electrode plate 5 are embedded and integrated in an insulating block 9 made of resin. In this case, a constricted portion 12c having a current fuse function is provided at the center of the movable electrode plate 12, and this constricted portion is embedded within the resin block 9 so as to be located at the central portion. The movable covered lead wire 4 is welded to the other end 12b of the movable electrode plate 12, and the fixed covered lead wire 8 is welded to the other end 5b of the fixed electrode plate 5. The mount body is constructed as described above. This mount body is made of resin with an opening at one end, and has a length of 16.4 mm+ and a width of 6 mm. It is stored in a container 10 with an OM thickness of 3.1 mm, the movable covered lead wire 4 and the fixed covered lead wire 8 are led out from the opening of the container 10, and the opening of the container 10 is filled with epoxy resin or the like. It is sealed with agent 11.
かかるサーマルプロテクタにおいては、例えば200A
の大電流を通電した場合、可動電極プレート12のくび
れ部12cが溶断することにより接点間の強烈なアーク
の発生を防止することができ、さらにくびれ部12cを
容器10の露出空間に配置せず、絶縁ブロック9に埋設
しているために、くびれ部12cの溶断時にその一端部
12aと他端部12b間に発生するアークを絶縁ブロッ
ク9で封じ込めることができるので、容器10外への発
火を回避することができる。また、このサーマルプロテ
クタは部品を新たに付加する必要がない上、組立工程を
何ら変更する必要もないので、安価に得ることができる
。In such a thermal protector, for example, 200A
When a large current of , because it is embedded in the insulating block 9, the arc generated between the one end 12a and the other end 12b when the constricted part 12c is fused can be contained in the insulating block 9, thereby preventing ignition to the outside of the container 10. can be avoided. Furthermore, this thermal protector does not require the addition of new parts and does not require any change in the assembly process, so it can be obtained at low cost.
ムお、上記実施例では電流ヒユーズ機能を持つくびれ部
を可動電極プレートに設けた場合について説明したが、
くびれ部は固定電極プレートに設けてもよく、また両方
のプレートに設けてもよいことはもちろんである。Hmm, in the above embodiment, the case was explained in which the movable electrode plate was provided with a constriction having a current fuse function.
Of course, the constricted portion may be provided on the fixed electrode plate, or may be provided on both plates.
発明の詳細
な説明したように、本発明は可動電極プレートを備えた
可動電極体と、固定電極プレートを備えた固定電極体と
を対向して設け、かつ前記可動電極プレートと前記固定
電極プレートとを絶縁ブロックで一体化したマウント体
を容器内に収納し、前記可動電極プレートと前記固定電
極プレートのうち少なくとも一方の一部に電流ヒユーズ
機能を持つくびれ部を形威し、このくびれ部を前記絶縁
ブロックに埋設しているので、大電流における通常時電
極プレートのくびれ部を溶断させることにより接点間ア
ークの発生を防止することができ、さらにくびれ部の溶
断時に電極プレートの両端部間に発生するアークを絶縁
ブロックで刺じ込めることかできるため、容器外への発
火を回避することができる安全性のきわめて高い小型の
サーマルプロテクタを安価に提供することができるもの
である。DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention provides a movable electrode body having a movable electrode plate and a fixed electrode body having a fixed electrode plate facing each other, and wherein the movable electrode plate and the fixed electrode plate A mount body that is integrated with an insulating block is housed in a container, and at least one of the movable electrode plate and the fixed electrode plate is formed with a constriction having a current fuse function, and this constriction is connected to the Since it is embedded in an insulating block, it is possible to prevent the occurrence of arc between the contacts by melting the constriction of the electrode plate under normal conditions at large currents, and also prevent the occurrence of arc between the ends of the electrode plate when the constriction is fused. Since the arc can be pierced with an insulating block, it is possible to provide an extremely safe and compact thermal protector that can avoid ignition outside the container at a low cost.
第1図fal、 (b)は本発明の一実施例であるサー
マルプロテクタの一部切欠正面図および同側面図、第2
図fat、 fblは従来のサーマルプロテクタの一部
切欠正面図および同側面図である。
2・・・・・・可動接点、2・・・・・・トリメタル、
5・・・・・・固定電極プレート、6・・・・・・固定
接点、9・・・・・・絶縁ブロック、10・・・・・・
容器、12・・・・・・可動電極プレート、12c・・
・・・・くびれ部。Fig. 1 fal, (b) is a partially cutaway front view and side view of a thermal protector which is an embodiment of the present invention, Fig. 2
Figures fat and fbl are a partially cutaway front view and a side view of a conventional thermal protector. 2...Movable contact, 2...Trimetal,
5...Fixed electrode plate, 6...Fixed contact, 9...Insulation block, 10...
Container, 12...Movable electrode plate, 12c...
...constriction.
Claims (1)
ートを備えた固定電極体とを対向して設け、かつ前記可
動電極プレートと前記固定電極プレートとを絶縁ブロッ
クで一体化したマウント体を容器内に収納し、前記可動
電極プレートと前記固定電極プレートのうち少なくとも
一方の一部に電流ヒューズ機能を持つくびれ部を形成し
、このくびれ部を前記絶縁ブロックに埋設したことを特
徴とするサーマルプロテクタ。A mount body in which a movable electrode body having a movable electrode plate and a fixed electrode body having a fixed electrode plate are provided facing each other, and the movable electrode plate and the fixed electrode plate are integrated with an insulating block is placed in a container. A thermal protector, characterized in that a constricted portion having a current fuse function is formed in a part of at least one of the movable electrode plate and the fixed electrode plate, and the constricted portion is embedded in the insulating block.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26320989A JP2743519B2 (en) | 1989-10-09 | 1989-10-09 | Thermal protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP26320989A JP2743519B2 (en) | 1989-10-09 | 1989-10-09 | Thermal protector |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03127422A true JPH03127422A (en) | 1991-05-30 |
JP2743519B2 JP2743519B2 (en) | 1998-04-22 |
Family
ID=17386299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP26320989A Expired - Fee Related JP2743519B2 (en) | 1989-10-09 | 1989-10-09 | Thermal protector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2743519B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11120853A (en) * | 1997-10-16 | 1999-04-30 | Nippon Technica Kk | Thermal protector for power source |
JP2007317685A (en) * | 2006-05-23 | 2007-12-06 | Totaku Industries Inc | Electromagnetic shielding material |
-
1989
- 1989-10-09 JP JP26320989A patent/JP2743519B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11120853A (en) * | 1997-10-16 | 1999-04-30 | Nippon Technica Kk | Thermal protector for power source |
JP2007317685A (en) * | 2006-05-23 | 2007-12-06 | Totaku Industries Inc | Electromagnetic shielding material |
Also Published As
Publication number | Publication date |
---|---|
JP2743519B2 (en) | 1998-04-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |