JP2502133B2 - Thermal switch - Google Patents
Thermal switchInfo
- Publication number
- JP2502133B2 JP2502133B2 JP63245632A JP24563288A JP2502133B2 JP 2502133 B2 JP2502133 B2 JP 2502133B2 JP 63245632 A JP63245632 A JP 63245632A JP 24563288 A JP24563288 A JP 24563288A JP 2502133 B2 JP2502133 B2 JP 2502133B2
- Authority
- JP
- Japan
- Prior art keywords
- contact piece
- heater
- contact
- opening
- narrow
- 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
- Details Of Measuring And Other Instruments (AREA)
- Thermally Actuated Switches (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、放電灯始動用等の熱応動スイッチに関す
るものである。TECHNICAL FIELD The present invention relates to a thermally responsive switch for starting a discharge lamp or the like.
従来より、放電灯点灯回路の放電灯始動装置におい
て、ランプフィラメントの予熱電流を遮断する熱応動ス
イッチがある。熱応動スイッチは、例えば第２図に示す
ように、一対の端子30,31にそれぞれ同一方向に湾曲す
る一対のバイメタルからなる接片32,33を固定し、各接
片32,33の先端に対面して接点34,35を設け、湾曲方向側
の接片33に巻線ヒータ36を巻いて構成され、巻線ヒータ
36の熱で接片33が開離する。また、第３図の例のよう
に、接片33にチップヒータ37を設けて接片33を開離させ
るものもある。なお、接片32は周囲温度補償用である。2. Description of the Related Art Conventionally, in a discharge lamp starting device of a discharge lamp lighting circuit, there is a heat responsive switch that shuts off a preheating current of a lamp filament. For example, as shown in FIG. 2, the heat-actuated switch has a pair of terminals 30 and 31 to which contact pieces 32 and 33 made of a pair of bimetals, which are curved in the same direction, are fixed. The contact points 34 and 35 are provided facing each other, and the winding heater 36 is wound around the contact piece 33 on the bending direction side.
The contact piece 33 is separated by the heat of 36. Further, as shown in the example of FIG. 3, there is also one in which a chip heater 37 is provided on the contact piece 33 to separate the contact piece 33. The contact piece 32 is for compensating the ambient temperature.
しかし、第２図の例の熱応動スイッチでは、巻線ヒー
タ36の熱容量が大きいため動作スピードが遅く、巻線ヒ
ータ36によって接片33の湾曲が邪魔されるという問題が
あった。さらに、巻線ヒータ36を設けるので、構造が複
雑になると共に、特性のばらつきが大きいという問題が
あった。また、第３図の例では、チップヒータ37を設け
るので、接片33の湾曲がチップヒータ37にて邪魔され、
構造も複雑となり、かつ特性のばらつきも大きくなると
いう問題を有していた。However, in the heat-responsive switch of the example of FIG. 2, there is a problem that the winding heater 36 has a large heat capacity, so that the operation speed is slow and the bending of the contact piece 33 is obstructed by the winding heater 36. Further, since the winding heater 36 is provided, there is a problem that the structure is complicated and the characteristic variation is large. Further, in the example of FIG. 3, since the chip heater 37 is provided, the bending of the contact piece 33 is obstructed by the chip heater 37,
There is a problem that the structure becomes complicated and the variation of the characteristics becomes large.
したがって、この発明の目的は、動作スピードが早
く、開離動作が円滑でかつ正確に行え、構造が簡単で、
かつ特性のばらつきの小さい熱応動スイッチを提供する
ことである。Therefore, the object of the present invention is to have a fast operation speed, a smooth and accurate opening operation, a simple structure,
Moreover, it is to provide a heat-responsive switch with a small variation in characteristics.
この発明の熱応動スイッチは、各々同一方向に湾曲す
るバイメタルからなる常閉の一対の接片を備えたもので
あり、湾曲方向側に存在する接片の中央部に開口部を形
成して通電路を幅狭とし、かつ通電により自己発熱して
他方の接片から開離可能としたことを特徴としたもので
ある。The thermoresponsive switch of the present invention comprises a pair of normally-closed contact pieces made of bimetal that are bent in the same direction, and an opening is formed at the center of the contact piece existing on the bending direction side. It is characterized in that the electric path is narrow and self-heated by energization so that it can be separated from the other contact piece.
この発明の熱応動スイッチによると、湾曲方向側の接
片の通電路が幅狭に形成され、自己発熱によって湾曲し
て他方の接片から開離する。このように、ヒータ等を使
用しないので、熱容量が小さく、接片の動作スピードが
早くなる。また、ヒータ等で邪魔されることなく開離動
作が円滑に行える。また、一対の接片のみからなり構造
が簡単であり、かつヒータ等がないので特性のばらつき
が小さくなる。さらに、湾曲方向側の接片の中央部に開
口部を形成して通電路を幅狭としてあるので、接片の通
電路は両側に２本存在し、そのため接片はねじれ難く、
誤動作によって他方の接片から開離するのを防止でき
る。According to the thermoresponsive switch of the present invention, the current path of the contact piece on the bending direction side is formed to have a narrow width, and the contact piece is bent by self-heating and separated from the other contact piece. As described above, since a heater or the like is not used, the heat capacity is small and the operating speed of the contact piece is fast. Further, the opening / closing operation can be smoothly performed without being disturbed by the heater or the like. Further, since the structure is simple with only a pair of contact pieces and there is no heater or the like, variations in characteristics are reduced. Furthermore, since the opening is formed in the central portion of the contact piece on the bending direction side and the current path is narrow, there are two current paths of the contact piece on both sides, so that the contact piece is difficult to twist.
It is possible to prevent the contact piece from being separated from the other contact piece due to a malfunction.
この発明の一実施例を第１図に基づいて説明する。図
において、10,11は端子であり、各端子10,11にそれぞれ
接片12,13が固定してある。両接片12,13は常閉であり、
周囲温度により同一方向（矢印方向）へ同一量湾曲する
同種類，同厚のバイメタルにて形成されており、両先端
には接点14,15が設けられている。また、湾曲方向側の
接片13には、中心に開口部16が形成され、通電路が幅狭
になっている。この幅狭になった部分の両側２本の通電
路20は抵抗値が大きく、したがって自己発熱量が大き
く、熱容量ならびに放熱面積が小さいことから、幅広の
接片12の通電路19に比べて速くかつ大きく湾曲し、接片
13が接片12から開離する。なお、接片12は周囲温度補償
用である。One embodiment of the present invention will be described with reference to FIG. In the figure, 10 and 11 are terminals, and contact pieces 12 and 13 are fixed to the terminals 10 and 11, respectively. Both contact pieces 12, 13 are normally closed,
It is formed of bimetal of the same type and thickness that bends in the same direction (arrow direction) by the same amount depending on the ambient temperature, and has contacts 14 and 15 at both ends. In addition, an opening 16 is formed in the center of the contact piece 13 on the bending direction side, and the width of the energization path is narrow. The two conduction paths 20 on both sides of this narrowed portion have a large resistance value, and therefore a large amount of self-heating, a small heat capacity and a small heat radiation area, so that they are faster than the conduction path 19 of the wide contact piece 12. And curved greatly, the contact piece
13 separates from the contact piece 12. The contact piece 12 is for ambient temperature compensation.
このように構成された熱応動スイッチによると、ヒー
タ等を使用せず通電による自己発熱によって接片13が湾
曲して接片12から開離するので、熱容量が小さく、接片
13の動作スピードが早くなる。また、ヒータ等で邪魔さ
れることがないので、開離動作が円滑に行える。また、
一対の接片12,13のみからなり構造が簡単であり、かつ
ヒータ等がないので特性のばらつきが小さくなる。ま
た、接片13の通電路の幅寸法を各種電流値に応じて決定
し、動作性能を自由に決めることができる。また、接片
13の中心に開口部16を形成して通電路20を幅狭としてあ
るので、接片13の通電路20は両側に２本存在し、そのた
め接片13はねじれ難く、接点14,15が誤動作によって開
離するのを防止でき、開離動作が正確に行える。さら
に、周囲温度が変化した場合に、両接片12,13が共に同
一量だけ湾曲するので、接点の押し込み量は常に一定と
なり、安定した動作が行える。According to the heat-responsive switch configured as described above, the contact piece 13 is curved and separated from the contact piece 12 by self-heating due to energization without using a heater or the like, so that the heat capacity is small and the contact piece is small.
13 speeds up. Further, since the heater is not disturbed, the opening / closing operation can be performed smoothly. Also,
The structure is simple with only a pair of contact pieces 12 and 13, and since there is no heater or the like, variations in characteristics are reduced. Further, the width dimension of the energization path of the contact piece 13 can be determined according to various current values, and the operation performance can be freely determined. Also, the contact piece
Since the opening 16 is formed at the center of 13 and the current path 20 is narrow, there are two current paths 20 on both sides of the contact piece 13, so that the contact piece 13 is difficult to twist and the contacts 14 and 15 malfunction. By this, it is possible to prevent the opening and the opening operation can be performed accurately. Further, when the ambient temperature changes, both contact pieces 12 and 13 are curved by the same amount, so that the contact pushing amount is always constant and stable operation can be performed.
この発明の熱応動スイッチによると、湾曲方向側の接
片の通電路が幅狭に形成され、自己発熱によって湾曲し
て他方の接片から開離する。このように、ヒータ等を使
用しないので、熱容量が小さく、接片の動作スピードが
早くなる。また、ヒータ等で邪魔されることなく開離動
作が円滑に行える。また、一対の接片のみからなり構造
が簡単であり、かつヒータ等がないので特性のばらつき
が小さくなる。さらに、湾曲方向側の接片の中央部に開
口部を形成して通電路を幅狭としてあるので、接片の通
電路は両側に２本存在し、そのため接片はねじれ難く、
誤動作によって他方の接片から開離するのを防止できる
という効果が得られる。According to the thermoresponsive switch of the present invention, the current path of the contact piece on the bending direction side is formed to have a narrow width, and the contact piece is bent by self-heating and separated from the other contact piece. As described above, since a heater or the like is not used, the heat capacity is small and the operating speed of the contact piece is fast. Further, the opening / closing operation can be smoothly performed without being disturbed by the heater or the like. Further, since the structure is simple with only a pair of contact pieces and there is no heater or the like, variations in characteristics are reduced. Furthermore, since the opening is formed in the central portion of the contact piece on the bending direction side and the current path is narrow, there are two current paths of the contact piece on both sides, so that the contact piece is difficult to twist.
The effect that it is possible to prevent the contact piece from being separated from the other contact piece due to a malfunction is obtained.
第１図はこの発明の一実施例の斜視図、第２図および第
３図は従来例の斜視図である。 12,13……接片、20……通電路FIG. 1 is a perspective view of an embodiment of the present invention, and FIGS. 2 and 3 are perspective views of a conventional example. 12,13 ...... Contact piece, 20 ...... Conductor
Claims (1)
る常閉の一対の接片を備えた熱応動スイッチにおいて、
湾曲方向側に存在する接片の中央部に開口部を形成して
通電路を幅狭とし、かつ通電により自己発熱して他方の
接片から開離可能としたことを特徴とする熱応動スイッ
チ。1. A thermoresponsive switch comprising a pair of normally-closed contact pieces made of bimetal that are curved in the same direction, respectively.
A thermal responsive switch characterized in that an opening is formed in the center of a contact piece existing on the bending direction side to narrow the energization path, and self-heating due to energization allows it to be separated from the other contact piece. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245632A JP2502133B2 (en) | 1988-09-27 | 1988-09-27 | Thermal switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245632A JP2502133B2 (en) | 1988-09-27 | 1988-09-27 | Thermal switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0290433A JPH0290433A (en) | 1990-03-29 |
| JP2502133B2 true JP2502133B2 (en) | 1996-05-29 |
Family
ID=17136549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63245632A Expired - Lifetime JP2502133B2 (en) | 1988-09-27 | 1988-09-27 | Thermal switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2502133B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022059067A1 (en) * | 2020-09-15 | 2022-03-24 | 株式会社生方製作所 | Motor protector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62172621A (en) * | 1986-01-27 | 1987-07-29 | 西村 英子 | Dynamic characteristics device |
-
1988
- 1988-09-27 JP JP63245632A patent/JP2502133B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0290433A (en) | 1990-03-29 |
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