JP2743513B2 - Thermal protector - Google Patents

Thermal protector

Info

Publication number
JP2743513B2
JP2743513B2 JP24123189A JP24123189A JP2743513B2 JP 2743513 B2 JP2743513 B2 JP 2743513B2 JP 24123189 A JP24123189 A JP 24123189A JP 24123189 A JP24123189 A JP 24123189A JP 2743513 B2 JP2743513 B2 JP 2743513B2
Authority
JP
Japan
Prior art keywords
fixed
thermal protector
container
contact
electrode lead
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 - Fee Related
Application number
JP24123189A
Other languages
Japanese (ja)
Other versions
JPH03102728A (en
Inventor
研策 上田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP24123189A priority Critical patent/JP2743513B2/en
Publication of JPH03102728A publication Critical patent/JPH03102728A/en
Application granted granted Critical
Publication of JP2743513B2 publication Critical patent/JP2743513B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Thermally Actuated Switches (AREA)
  • Fuses (AREA)

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に用いられ、異常時の発熱およ
び過電流等による電気機器の焼損保護のためのサーマル
プロテクタに関するものである。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal protector that is used in various electric equipment and protects the electric equipment from burning due to abnormal heat generation and overcurrent.

従来の技術 従来、この種のサーマルプロテクタは可動側電極固定
側電極とを対向して固定したマウント体を容器内に収納
した構造になっている。そして、このようなサーマルプ
ロテクタは、各種電気機器の発熱部に取り付けられ、何
らかの異常でその部分の温度が上昇したり、過電流が流
れたりしたとき、可動側電極のスナップアクション型熱
応動素子が反転することにより、同素子が固定側電極か
ら離間動作して電気機器への通電を遮断する保護機能を
有している。
2. Description of the Related Art Conventionally, this type of thermal protector has a structure in which a mount body in which a movable-side electrode and a fixed-side electrode are fixed to face each other is housed in a container. Such a thermal protector is attached to the heat-generating part of various electric devices, and when the temperature of the part rises or an overcurrent flows due to some abnormality, the snap-action type thermo-responsive element of the movable electrode is used. By inverting the element, the element has a protection function of separating from the fixed-side electrode and cutting off the current to the electric device.

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、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 is required to be able to withstand a large current, particularly when used in a motor, a fluorescent lamp stabilizer or the like. However, if it is miniaturized with such a structure,
Since the volume of the container is reduced, the internal pressure of the container increases due to the arc heat caused by the intense arc between contacts when energizing at a large current, and it is not possible to prevent the container from being damaged and igniting outside the container. There were serious disadvantages.

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 has been made in order to solve such a problem associated with a small-sized structure, and a small-sized thermal protector with high safety that does not cause ignition or the like even when used in a motor or a fluorescent lamp stabilizer. To 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、先端部に接点が固定
されたスナップアクション型熱応動素子に可動電極リー
ド線を接続した可動側電極と、固定側電極とを対向して
設けたマウント体を容器内に収納し、前記固定側電極
は、固定電極リードと、この固定電極リード線の先端部
に取り付けられた可溶性金属線と、この可溶性金属線の
先端部に固定された接点とからなる。
Means for Solving the Problems The thermal protector of the present invention is provided with a movable-side electrode in which a movable electrode lead wire is connected to a snap-action type thermoresponsive element having a fixed contact at a tip end, and a fixed-side electrode opposed to each other. The fixed body electrode is housed in a container, and the fixed-side electrode includes a fixed electrode lead, a soluble metal wire attached to a tip of the fixed electrode lead, and a contact fixed to the tip of the soluble metal wire. Consists of

作用 本発明はサーマルプロテクタに大電流が流れると、可
溶性金属線が瞬時に溶断または軟化による変形を生じ、
接点間が開放状態となって、サーマルプロテクタへの通
電を遮断するために、強烈な接点間アークによる容器外
への発火を防止することができる。
Function When a large current flows through the thermal protector, the soluble metal wire is instantaneously melted or deformed by softening.
Since the contacts are opened and the energization of the thermal protector is cut off, it is possible to prevent ignition outside the container due to a strong arc between the contacts.

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。
Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

第1図および第2図に示すように、本発明実施例のサ
ーマルプロテクタは、先端部に接点1を溶接固定したス
ナップアクション型熱応動素子2、このスナップアクシ
ョン型熱応動素子の一端部に一端部が溶接された補助金
属板3、およびこの補助金属板の他端部に溶接された可
動電極リード線4からなる可動側電極5と、接点1と所
定の接触圧力で交差接触するように先端部に接点6を溶
接固定した例えばモネル金属等からなる直径0.4〜0.6mm
の可溶性金属線7、およびこの可溶性金属線が溶接され
た固定電極リード線8からなる固定側電極9とを対向し
てガラスまたは樹脂からなるビード10で一体化したマウ
ント体11をガラスまたは樹脂からなる容器12内に収納
し、この容器の開口部を加熱速硬化型の難燃性シリコン
ゴムまたはエポキシ系レジンからなる充填剤13で封止し
ている。
As shown in FIGS. 1 and 2, a thermal protector according to an embodiment of the present invention has a snap-action type thermoresponsive element 2 having a contact 1 welded to the tip, and one end at one end of the snap-action type thermoresponsive element. The tip of the auxiliary metal plate 3 having a welded portion and the movable electrode 5 composed of the movable electrode lead wire 4 welded to the other end of the auxiliary metal plate so as to cross-contact with the contact 1 at a predetermined contact pressure. 0.4 to 0.6 mm in diameter made of, for example, Monel metal with the contact 6 welded to the part
A fixed body 9 composed of a soluble metal wire 7 and a fixed electrode lead wire 8 to which the soluble metal wire is welded is opposed to and integrated with a glass or resin bead 10 to form a mount body 11 made of glass or resin. Of the container, and the opening of the container is sealed with a filler 13 made of a heat-hardening type flame-retardant silicone rubber or epoxy resin.

以上のような構成を有するサーマルプロテクタに大電
流が流れた時、可溶性金属線7が瞬時に溶断ないしは軟
化による変形を生じ、このため固定側電極9の接点6か
ら可動側電極5の接点1が離れて、サーマルプロテクタ
への通電が遮断される。したがって、このサーマルプロ
テクタによれば、接点1,6間に発生する強烈なアークに
よる容器12外への発火を防止することができる。
When a large current flows through the thermal protector having the above configuration, the soluble metal wire 7 is instantaneously deformed by fusing or softening, so that the contact 6 from the fixed electrode 9 to the contact 1 from the movable electrode 5 is changed. The power to the thermal protector is cut off. Therefore, according to this thermal protector, it is possible to prevent ignition outside the container 12 due to a strong arc generated between the contacts 1 and 6.

上記実施例にもとづき、第1表に示すとおりの寸度を
有する小型サーマルプロテクタ(本発明品)を製作し、
AC125V〜250V200Aの短絡回路試験を行ったところ、第2
表に示すとおりの結果が得られた。なお、第1表中、従
来品とは従来の技術で述べた構造のもの、また第2表
中、比較品とは従来例の構造でもって縮小化(最大径5.
85mm,全長18mm)したものである。
Based on the above embodiment, a small thermal protector (product of the present invention) having dimensions as shown in Table 1 was manufactured.
When the short circuit test of AC125V ~ 250V200A was performed,
The results as shown in the table were obtained. In Table 1, the conventional product has the structure described in the related art, and in Table 2, the comparative product has the same structure as that of the conventional example.
85mm, total length 18mm).

第1表および第2表から明らかなように、本発明品は
外容積比で従来品に比して40%縮小した小型のものであ
りながら、上記試験において容器外への発火を完全に防
止できることがわかる。
As is evident from Tables 1 and 2, the product of the present invention is a compact product whose external volume ratio is reduced by 40% compared to the conventional product, but completely prevents ignition outside the container in the above test. We can see that we can do it.

発明の効果 以上説明したように、本発明は先端部に接点が固定さ
れたスナップアクション型熱応動素子に可動電極リード
線を接続した可動側電極と、固定側電極とを対向して設
けたマウント体を容器内に収納し、前記固定側電極は、
固定電極リードと、この固定電極リード線の先端部に取
り付けられた可溶性金属線と、この可溶性金属線の先端
部に固定された接点とからなるものであり、したがって
大電流における通電時の接点間アークの発生を未然に防
止することができるので、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
クタを提供することができる。
Effect of the Invention As described above, the present invention provides a mount in which a movable-side electrode in which a movable-electrode lead wire is connected to a snap-action-type thermoresponsive element having a fixed contact at a tip end, and a fixed-side electrode are provided to face each other. The body is housed in a container, and the fixed-side electrode is
It consists of a fixed electrode lead, a soluble metal wire attached to the tip of the fixed electrode lead, and a contact fixed to the tip of the soluble metal wire. Since the occurrence of an arc can be prevented beforehand, it is possible to provide a very safe and small thermal protector capable of avoiding ignition outside the container.

【図面の簡単な説明】[Brief description of the drawings]

第1図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、第2図は同サーマルプロテクタのマウ
ント体の斜視図である。 1……接点、2……スナップアクション型熱応動素子、
4……可動電極リード線、5……可動側電極、6……接
点、7……可溶性金属線、8……固定電極リード線、9
……固定側電極、10……ビード、11……マウント体、12
……容器、13……充填剤。
FIG. 1 is a partially cutaway front view of a thermal protector according to an embodiment of the present invention, and FIG. 2 is a perspective view of a mount body of the thermal protector. 1 contact point 2 snap action type thermo-responsive element
4 ... Movable electrode lead wire, 5 ... Movable electrode, 6 ... Contact, 7 ... Soluble metal wire, 8 ... Fixed electrode lead wire, 9
…… Fixed electrode, 10… Bead, 11… Mount, 12
... container, 13 ... filler.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】先端部に接点が固定されたスナップアクシ
ョン型熱応動素子に可動電極リード線を接続した可動側
電極と、固定側電極とを対向して設けたマウント体を容
器内に収納し、前記固定側電極は、固定電極リードと、
この固定電極リード線の先端部に取り付けられた可溶性
金属線と、この可溶性金属線の先端部に固定された接点
とからなることを特徴とするサーマルプロテクタ。
A movable body in which a movable electrode lead wire is connected to a snap action type thermoresponsive element having a contact fixed to a tip end, and a mount body provided with a fixed side electrode opposed to each other are housed in a container. , The fixed-side electrode is a fixed electrode lead,
A thermal protector comprising: a soluble metal wire attached to a distal end of the fixed electrode lead; and a contact fixed to the distal end of the soluble metal wire.
JP24123189A 1989-09-18 1989-09-18 Thermal protector Expired - Fee Related JP2743513B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24123189A JP2743513B2 (en) 1989-09-18 1989-09-18 Thermal protector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24123189A JP2743513B2 (en) 1989-09-18 1989-09-18 Thermal protector

Publications (2)

Publication Number Publication Date
JPH03102728A JPH03102728A (en) 1991-04-30
JP2743513B2 true JP2743513B2 (en) 1998-04-22

Family

ID=17071155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24123189A Expired - Fee Related JP2743513B2 (en) 1989-09-18 1989-09-18 Thermal protector

Country Status (1)

Country Link
JP (1) JP2743513B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130026690A1 (en) 2010-04-26 2013-01-31 Mitsubishi Electric Corporation Wet-etching jig

Also Published As

Publication number Publication date
JPH03102728A (en) 1991-04-30

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