JPH03192629A - Thermal protector - Google Patents
Thermal protectorInfo
- Publication number
- JPH03192629A JPH03192629A JP33051289A JP33051289A JPH03192629A JP H03192629 A JPH03192629 A JP H03192629A JP 33051289 A JP33051289 A JP 33051289A JP 33051289 A JP33051289 A JP 33051289A JP H03192629 A JPH03192629 A JP H03192629A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- movable electrode
- electrode plate
- movable
- fixed
- 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.)
- Pending
Links
- 230000001012 protector Effects 0.000 title claims description 18
- 210000000078 claw Anatomy 0.000 claims abstract description 7
- 230000035939 shock Effects 0.000 abstract description 4
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
- H01H37/54—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
- H01H37/5427—Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting encapsulated in sealed miniaturised housing
Landscapes
- Thermally Actuated Switches (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蛍光灯安定
器等に用いられ、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 protector to prevent burnout of electrical equipment due to abnormal heat generation and overcurrent. , especially regarding small thermal protectors.
従来の技術 従来のサーマルプロテクタとして第4図(a)。Conventional technology FIG. 4(a) shows a conventional thermal protector.
(bl、 (C1に示すような構成を有しているものが
知られている(特開昭59−189520号公報)。(bl, (C1) is known (Japanese Unexamined Patent Publication No. 189520/1989).
すなわち、ばね性を有する可動電極プレート13の先端
に可動接点14を固着し、可動電極プレート13の背面
に熱応動素子板15を固定し一体化して可動電極体を構
成している。この固定は、可動電極プレート13の支持
部13a、13b、13cによって囲まれた部分に熱応
動素子板15を入れて可動電極プレート13の背面に位
置させ、その支持部13a、13bをかしめることによ
って行われる。この場合、熱応動素子板15の反転およ
び復帰動作に支障がないよう、熱応動素子板15は可動
電極プレート13の支持部13a、13b13cに対し
、わずかの裕度を持って動くことができるようになって
いる。さらに、可動側リード線16に可動電極プレート
13の溶接部13dを固着して、可動電極体を構成する
。一方、固定接点17を固定側リード線18に固着して
固定電極体を構成し、これらの電極体を可動接点14と
固定接点17が対向するように位置させ、ガラスビード
19にて一体化し、マウント体を構成する。このマウン
ト体はガラス容器20に収納し、この中に窒素等の不活
性ガスを封入し、ガラス容器20の端部を加熱して封止
されている。That is, a movable contact 14 is fixed to the tip of a movable electrode plate 13 having spring properties, and a thermally responsive element plate 15 is fixed and integrated to the back surface of the movable electrode plate 13 to form a movable electrode body. This fixation is achieved by inserting the thermally responsive element plate 15 into a portion surrounded by the support parts 13a, 13b, and 13c of the movable electrode plate 13, positioning it on the back surface of the movable electrode plate 13, and caulking the support parts 13a and 13b. carried out by In this case, the thermally responsive element plate 15 is designed to be able to move with a slight margin with respect to the support portions 13a, 13b13c of the movable electrode plate 13 so that the reversal and return operations of the thermally responsive element plate 15 are not hindered. It has become. Further, the welded portion 13d of the movable electrode plate 13 is fixed to the movable lead wire 16 to form a movable electrode body. On the other hand, the fixed contact 17 is fixed to the fixed lead wire 18 to form a fixed electrode body, these electrode bodies are positioned so that the movable contact 14 and the fixed contact 17 face each other, and are integrated with a glass bead 19. Configure the mount body. This mount body is housed in a glass container 20, which is filled with an inert gas such as nitrogen, and the ends of the glass container 20 are heated and sealed.
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電流に感
応して、熱応動素子板15が反転復帰動作を行い、かつ
可動電極プレート13が対応した動作を行って、可動接
点14と固定接点17の開閉を行い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 or the like, and the thermally responsive element plate 15 performs a reversal return operation in response to an abnormal temperature rise and overcurrent, and the movable electrode plate 13 responds to the abnormal temperature rise and overcurrent. It has the function of opening and closing the movable contact 14 and the fixed contact 17 by operating, thereby preventing burnout of the motor, etc.
発明が解決しようとする課題
このような構造のサーマルプロテクタを小型化していく
場合、容器の容積が小さくなるために、構造部品の小型
化が要求されることになる。特に、サーマルプロテクタ
の心臓部である熱応動素子板15を小さくすると、熱応
動素子板15の反転復帰動作の反発力も弱くなり、必然
的に可動電極プレート13のバネ力を弱くしなくてはな
らない。その結果、可動接点14と固定接点17の接触
圧力が低くなるために、電気機器の正常時でも通常の振
動や衝撃によって導通が不安定になる場合があるという
重大な欠点があった。Problems to be Solved by the Invention When a thermal protector having such a structure is miniaturized, the volume of the container becomes smaller, and therefore, the structural parts are required to be miniaturized. In particular, if the thermally responsive element plate 15, which is the heart of the thermal protector, is made smaller, the repulsive force of the reverse and return operation of the thermally responsive element plate 15 will also be weakened, and the spring force of the movable electrode plate 13 will inevitably have to be weakened. . As a result, since the contact pressure between the movable contact 14 and the fixed contact 17 becomes low, there is a serious drawback in that even when the electrical equipment is operating normally, normal vibrations and shocks may cause electrical continuity to become unstable.
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
ても導通不安定を引き起こすおそれのない高品質の小型
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 high-quality compact thermal protector that does not cause instability in continuity even when used in motors, fluorescent lamp ballasts, etc. It is something to do.
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、ばね性を有し、先端に
可動接点を固着した可動電極プレートを備えた可動電極
体と、前記可動接点に対して接離する固定接点を先端に
固着した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、かつ前記可動電極体と前記固定電極体の支持
部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の先端をこの可動電極プレ
ートの背面側に折返して形成した爪部と前記可動電極プ
レートのほぼ中央部を切込んでこの可動電極プレートの
背面側に突出して形成した舌片部上で熱応動素子板の両
端部を係止することにより、前記可動電極プレートの背
面に沿って前記熱応動素子板を設け、かつ前記舌片部で
もって前記熱応動素子板の端部からほぼ中央部にかけて
の部分を所定の圧力で押圧しているものである。Means for Solving the Problems The thermal protector of the present invention has a movable electrode body having a spring property and having a movable electrode plate having a movable contact fixed to its tip, and a fixed contact that comes into contact with and separates from the movable contact. A mount body in which a fixed electrode body having a fixed electrode plate fixed to the tip thereof is provided facing each other, and a supporting portion of the movable electrode body and the fixed electrode body are integrated with an insulating block is housed in a container, On the claw portion formed by folding the tip of the movable electrode plate to the back side of the movable electrode plate and the tongue piece formed by cutting approximately the center of the movable electrode plate and protruding to the back side of the movable electrode plate. By locking both ends of the thermally responsive element plate, the thermally responsive element plate is provided along the back surface of the movable electrode plate, and the tongue portion extends from the end of the thermally responsive element plate to approximately the center. The part that extends is pressed with a predetermined pressure.
作用
本発明はサーマルプロテクタの小型化に伴って、可動電
極プレートのばね力を弱くすることにより生じる可動接
点と固定接点との接触圧力の低下を防ぐために、可動電
極プレートの背面側に突出した舌片部によって、可動電
極プレートの背面に沿って設けた熱応動素子板の一部を
所定の圧力で常に加圧状態としている。その結果、熱応
動素子板を介して可動電極プレートの先端が常時押され
るために、可動接点と固定接点の接触圧力が高くなって
導通を安定化させることができる。Function: With the miniaturization of thermal protectors, the present invention has developed a tongue protruding from the back side of the movable electrode plate in order to prevent a decrease in the contact pressure between the movable contact and the fixed contact caused by weakening the spring force of the movable electrode plate. A part of the thermally responsive element plate provided along the back surface of the movable electrode plate is always kept in a pressurized state with a predetermined pressure by the piece. As a result, since the tip of the movable electrode plate is constantly pressed through the thermally responsive element plate, the contact pressure between the movable contact and the fixed contact increases, making it possible to stabilize conduction.
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)、 Tbl、第2図および第3図に示すよ
うに、本発明実施例のサーマルプロテクタは、ばね性を
有する薄いリン青銅板からなる可動電極プレート1の先
端に銀系からなる可動接点2を溶接により固着し、可動
電極プレート1の背面に沿ってバイメタルからなるスナ
ップアクション形の熱応動素子板3を設けている。この
場合、熱応動素子板の両端部3は、可動電極プレート1
の先端をその背面側に折返して形成した爪部1aと、可
動電極プレート1のほぼ中央部を切り込んでその背面側
に突出して形成した舌片部1bとで係止されている。さ
らに、可動電極プレート1には、中央部にダボ部1dを
設け、かっ他端の固定部1cが舌片部1bと反対方向に
適当な角度で曲げ成形がされている。As shown in FIG. 1(a), Tbl, FIG. 2, and FIG. The movable contact 2 is fixed by welding, and a snap-action thermally responsive element plate 3 made of bimetal is provided along the back surface of the movable electrode plate 1. In this case, both ends 3 of the thermally responsive element plate are connected to the movable electrode plate 1
It is locked by a claw part 1a formed by folding the tip of the movable electrode plate 1 back to the back side thereof, and a tongue part 1b formed by cutting into the approximate center of the movable electrode plate 1 and protruding to the back side thereof. Further, the movable electrode plate 1 is provided with a dowel portion 1d in the center, and a fixed portion 1c at the other end of the dowel portion is bent at an appropriate angle in the opposite direction to the tongue portion 1b.
可動電極プレート1の固定部1cを可動側電極基板4の
先端部に溶接し、それと対向して固定電極プレート7の
先端に銀系からなる固定接点6を溶接により固着し、固
定電極プレート7の他端部は固定側電極基板8の先端部
に溶接して、可動接点2と固定接点6が所定の圧力で接
触するように可動側電極基板4と固定側電極基板8は各
々のほぼ中央部の支持部をPBT樹脂等からなる絶縁ブ
ロック10で一体化されている。さらに、可動側電極基
板4の他端部に可動側被覆リード線5を溶接し、固定側
電極基板8の他端部に固定側被覆リード線9を溶接して
マウント体を構成している。The fixed part 1c of the movable electrode plate 1 is welded to the tip of the movable electrode substrate 4, and the fixed contact 6 made of silver is fixed by welding to the tip of the fixed electrode plate 7 facing the fixed part 1c. The other end is welded to the tip of the fixed electrode substrate 8, and the movable electrode substrate 4 and the fixed electrode substrate 8 are welded to each other approximately in the center so that the movable contact 2 and the fixed contact 6 come into contact with each other with a predetermined pressure. The supporting portion is integrated with an insulating block 10 made of PBT resin or the like. Further, a movable covered lead wire 5 is welded to the other end of the movable electrode substrate 4, and a fixed covered lead wire 9 is welded to the other end of the fixed electrode substrate 8 to form a mount body.
そして、このマウント体は一端に開口部を有するPBT
樹脂等からなる長さ約18mm、幅約7mn、厚さ約4
順の小型の容器11内に収納し、容器11の開口部から
可動側被覆リード線5と固定側被覆リード線9を外部に
導出し、容器11の開口部をエポキシ樹脂等からなる充
填対12にて封止している。This mount body is made of PBT with an opening at one end.
Approximately 18 mm long, approximately 7 mm wide, and approximately 4 mm thick, made of resin etc.
The movable covered lead wire 5 and the fixed covered lead wire 9 are led out from the opening of the container 11, and the opening of the container 11 is filled with a pair 12 made of epoxy resin or the like. It is sealed.
かかる構造の小型サーマルプロテクタにおいては、可動
電極プレート1のばね力を弱くしても、ダボ部1dと熱
応動素子板3との間に隙間があるようにしてあり、かつ
舌片部1bでもって熱応動素子板3の端部からほぼ中央
部にかけて部分を常時所定の圧力で加圧しているために
、熱応動素子板3の先端部分で可動接点2を押すことに
なるので、可動接点2と固定接点6の接触圧力を高くす
ることができ、接触圧力不足による導通不安定を防止で
きる。また、舌片部1bの根元部1eと爪部1aには、
熱応動素子板3に対してわずかの裕度を持たせてあり、
熱応動素子板3の反転復帰動作に支障がないようにもし
である。In the small thermal protector having such a structure, even if the spring force of the movable electrode plate 1 is weakened, there is still a gap between the dowel portion 1d and the thermally responsive element plate 3, and the tongue portion 1b provides a gap between the dowel portion 1d and the thermally responsive element plate 3. Since the area from the end of the thermally responsive element plate 3 to approximately the center is constantly pressurized with a predetermined pressure, the tip of the thermally responsive element plate 3 pushes the movable contact 2. The contact pressure of the fixed contact 6 can be increased, and unstable conduction due to insufficient contact pressure can be prevented. In addition, the root portion 1e of the tongue portion 1b and the claw portion 1a,
A slight margin is provided for the thermally responsive element plate 3,
This is done so that there is no problem in the reversal and return operation of the thermally responsive element plate 3.
一方、モータ等の電気機器の異常時については、第3図
に示すように熱応動素子板3が反転し、熱応動素子板3
が可動電極プレート1の爪部la、 ダボ部1dおよ
び根元部1eの三点に当接して、可動電極プレート1が
熱応動素子板30反転動作に対応した動きとなって、固
定接点6から可動接点2を開離させることになる。この
時、舌片部1bは熱応動素子板3を加圧せず自由な舌片
となっている。On the other hand, in the event of an abnormality in electrical equipment such as a motor, the thermally responsive element plate 3 is inverted as shown in FIG.
comes into contact with three points of the movable electrode plate 1: the claw portion la, the dowel portion 1d, and the base portion 1e, and the movable electrode plate 1 moves in accordance with the reversal movement of the thermally responsive element plate 30, and is movable from the fixed contact 6. Contact point 2 will be opened. At this time, the tongue portion 1b does not press the thermally responsive element plate 3 and remains a free tongue.
このサーマルプロテクタは部品を新らたに付加する必要
がないため、安価で、かつ小型にもかかわらず、従来の
ものと同等の品質性能のものを得ることができる。Since this thermal protector does not require the addition of new parts, it is possible to obtain the same quality and performance as conventional ones, despite being inexpensive and small.
発明の詳細
な説明したように、本発明はサーマルプロテクタが小型
になっても、可動電極プレートに設けた舌片部によって
熱応動素子板を常に加圧することにより、間接的に可動
接点と固定接点の接触圧力を高くすることができ、電気
機器の正常時の通常の振動や衝撃に対しても接点の導通
不安定を未然に防止できる品質性能の高い小型のサーマ
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
。As described in detail, the present invention allows even if the thermal protector becomes smaller, by always pressurizing the thermally responsive element plate with the tongue piece provided on the movable electrode plate, the movable contact and the fixed contact can be indirectly connected. To provide a low-cost, high-quality, compact thermal protector that can increase contact pressure and prevent unstable conduction of contacts even when normal vibrations and shocks occur during normal operation of electrical equipment. It is possible.
第1図(al、 (bl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
図は本発明の可動電極プレートの斜視図、第3図は本発
明の一実施例であるサーマルプロテクタの熱応動素子の
反転動作時における一部切欠側面図、第4図faL (
b)、 (C1は従来のサーマルプロテクタの一部切欠
正面図、同側面図および可動電極プレートの斜視図であ
る。
1・・・・・・可動電極プレート、1a・・・・・・爪
部、1b・・・・・・舌片部、1d・・・・・・ダボ部
、2・・・・・・可動接点、3・・・・・・熱応動素子
板、6・・・・・・固定接点、10・・・・・・絶縁ブ
ロック、11・・・・・・容器。FIG. 1 (al, (bl) is a partially cutaway front view and side view of a thermal protector according to an embodiment of the present invention, and FIG.
The figure is a perspective view of the movable electrode plate of the present invention, FIG. 3 is a partially cutaway side view of a thermally responsive element of a thermal protector according to an embodiment of the present invention during reversal operation, and FIG.
b), (C1 is a partially cutaway front view, a side view thereof, and a perspective view of a movable electrode plate of a conventional thermal protector. 1...Movable electrode plate, 1a...Claw portion , 1b...tongue part, 1d...dowel part, 2...movable contact, 3...thermally responsive element plate, 6...・Fixed contact, 10... Insulation block, 11... Container.
Claims (1)
ートを備えた可動電極体と、前記可動接点に対し接離す
る固定接点を先端に固着した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、かつ前記可動電極体と前
記固定電極体の支持部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の先端
をこの可動電極プレートの背面側に折返して形成した爪
部と前記可動電極プレートのほぼ中央部を切込んでこの
可動電極プレートの背面側に突出して形成した舌片部と
で熱応動素子板の両端部を係止することにより、前記可
動電極プレートの背面に沿って前記熱応動素子板を設け
、かつ前記舌片部でもって前記熱応動素子板の端部から
ほぼ中央部にかけての部分を所定の圧力で押圧している
ことを特徴とするサーマルプロテクタ。A movable electrode body having a spring property and having a movable electrode plate having a movable contact fixed to its tip, and a fixed electrode body having a fixed electrode plate having a fixed contact fixed to its tip that moves toward and away from the movable contact. A mount body that is provided facing each other and that integrates the supporting parts of the movable electrode body and the fixed electrode body with an insulating block is housed in a container, and the tip of the movable electrode plate is folded back to the back side of the movable electrode plate. By locking both ends of the thermally-responsive element plate with the claw portion formed by the above-described method and the tongue portion formed by cutting into the approximate center of the movable electrode plate and protruding toward the back side of the movable electrode plate, the above-mentioned The thermally responsive element plate is provided along the back surface of the movable electrode plate, and the tongue portion presses a portion of the thermally responsive element plate from the end to approximately the center with a predetermined pressure. Thermal protector.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33051289A JPH03192629A (en) | 1989-12-20 | 1989-12-20 | Thermal protector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33051289A JPH03192629A (en) | 1989-12-20 | 1989-12-20 | Thermal protector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH03192629A true JPH03192629A (en) | 1991-08-22 |
Family
ID=18233460
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33051289A Pending JPH03192629A (en) | 1989-12-20 | 1989-12-20 | Thermal protector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH03192629A (en) |
-
1989
- 1989-12-20 JP JP33051289A patent/JPH03192629A/en active Pending
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5659285A (en) | Double safety thermostat having movable contacts disposed in both ends of a resilient plate | |
JP3828476B2 (en) | Non-energized sealed motor protector | |
JP2745188B2 (en) | Connection terminal for fuse | |
JPS6346993Y2 (en) | ||
KR20050048693A (en) | Fuse | |
US4843363A (en) | Three-phase thermal protector | |
US7298239B2 (en) | Thermal protector | |
JP2599797B2 (en) | Sealed three-phase protection device | |
JP2002124172A (en) | Thermal protector | |
US5107241A (en) | Thermally responsive switch | |
CN1039515C (en) | Thermal protector | |
CN100499005C (en) | Protector for electrical apparatus | |
JPH03192629A (en) | Thermal protector | |
US4914414A (en) | Thermally responsive switch | |
US5229740A (en) | Thermally responsive switch | |
JP3052349B2 (en) | Thermal protector | |
JP2860517B2 (en) | Thermal responsive switch and manufacturing method thereof | |
JP2002352685A (en) | Thermal protector | |
JPH0728673Y2 (en) | Circuit breaker | |
JP2001052580A (en) | Thermally-actuated switch | |
JP2743519B2 (en) | Thermal protector | |
JPH0217394Y2 (en) | ||
KR200151762Y1 (en) | Structure for mounting a window of a front panel | |
JP2743512B2 (en) | Thermal protector | |
WO2021187129A1 (en) | Breaker, safety circuit, and secondary battery pack |