JPH0217394Y2 - - Google Patents
Info
- Publication number
- JPH0217394Y2 JPH0217394Y2 JP1983059799U JP5979983U JPH0217394Y2 JP H0217394 Y2 JPH0217394 Y2 JP H0217394Y2 JP 1983059799 U JP1983059799 U JP 1983059799U JP 5979983 U JP5979983 U JP 5979983U JP H0217394 Y2 JPH0217394 Y2 JP H0217394Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode plate
- upper electrode
- bimetal
- temperature coefficient
- lower electrode
- 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
Links
- 230000001012 protector Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910001120 nichrome Inorganic materials 0.000 description 3
- MOFOBJHOKRNACT-UHFFFAOYSA-N nickel silver Chemical compound [Ni].[Ag] MOFOBJHOKRNACT-UHFFFAOYSA-N 0.000 description 2
- 239000010956 nickel silver Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Description
【考案の詳細な説明】
（技術分野）
本考案は各種電気機器の過熱状態を検出して通
電を停止する自己保持形サーマルプロテクタに関
する。[Detailed Description of the Invention] (Technical Field) The present invention relates to a self-holding thermal protector that detects an overheating state of various electrical devices and stops energization.
（従来技術）
従来より、この種の自己保持形サーマルプロテ
クタとしては、２つの安定状態を有するバイメタ
ルを使用し、バイメタルが１つの安定状態からい
ま１つの安定状態に反転した後、もとの状態に復
帰させるときに押ボタンを使用するものや、ある
いは具体的には図示しないが、ニクロムヒータや
正特性サーミスタ等でバイメタルを加熱して自己
保持させるものが一般に知られている。(Prior art) Conventionally, this type of self-holding thermal protector uses a bimetal that has two stable states, and after the bimetal reverses from one stable state to another stable state, it returns to the original state. It is generally known that a push button is used to return the bimetal to the normal state, or, although not specifically shown, a bimetal is heated with a nichrome heater, a positive temperature coefficient thermistor, or the like to self-hold the bimetal.
ところで、作動後の復帰を押ボタンにより行な
うバイメタルスイツチは大型で押ボタンを有する
ことから取付位置に制約を受け、しかも、バイメ
タルが元の状態に自動的に復帰しないようにする
ため、バイメタルを大きく湾曲させており、繰返
し寿命が短い欠点があつた。また、ニクロムヒー
タを使用するものでは、ニクロムヒータの断線な
どの問題があり、さらに、正特性サーミスタを使
用するものでは、振動や衝撃等によつて正特性サ
ーミスタが押えバネから外れてしまうことがあ
り、それを防止するためには、正特性サーミスタ
を一定位置に固定するために高温半田による半田
付けのキヤツプ状の受座等が必要となり、半田付
けのわずらわしさや、正特性サーミスタの実質的
な電極間距離が小さくなるという問題があつた。 By the way, bimetal switches that use a push button to return after activation are large and have a push button, so there are restrictions on the mounting position.Moreover, in order to prevent the bimetal from automatically returning to its original state, the bimetal should be made large. It had the disadvantage of being curved and having a short cycle life. Additionally, products that use a nichrome heater have problems such as disconnection of the nichrome heater, and products that use a positive temperature coefficient thermistor may come off the presser spring due to vibration or impact. In order to prevent this, a cap-shaped seat, etc. that is soldered with high-temperature solder is required to fix the PTC thermistor in a fixed position. There was a problem that the distance between the electrodes became small.
（考案の目的）
本考案の目的は、振動や衝撃に対して正特性サ
ーミスタの位置がズレることがなく、正特性サー
ミスタを定位置に固定するための受座等を必要と
せず、小型で信頼性が高く、かつ安価な自己保持
形サーマルプロテクタを提供することである。(Purpose of the invention) The purpose of the invention is to prevent the position of the PTC thermistor from shifting due to vibration or shock, to eliminate the need for a seat, etc. to fix the PTC thermistor in place, and to be small and reliable. An object of the present invention is to provide a self-holding type thermal protector with high performance and low cost.
（考案の構成）
このため、本考案は、絶縁シートに抜き孔が設
けられ、この抜き孔に上下両主面に夫々電極を形
成してなる正特性サーミスタが嵌入され、上記絶
縁シートの周縁部は正特性サーミスタおよびバイ
メタルを収容する凹部が形成されてなる上電極板
と下電極板の周縁部との間に挟持されて上電極板
と下電極板とが絶縁状態に固定されており、上電
極板と正特性サーミスタとの間には中央部が上電
極板に向かつて突出するとともに、周縁が上電極
板に向かつて湾曲してなる板バネが介装される一
方、先端部に設けられた可動接点が下電極板に設
けられた固定接点に離接する上記バイメタルの後
端部が上記板バネの中央部と上電極板との間で支
持されて上電極板に導通しており、正特性サーミ
スタの熱を上記バイメタルに与えて可動接点の固
定接点に対するオフ状態を保持させるようにした
ことを特徴としている。(Structure of the invention) Therefore, in the present invention, a punching hole is provided in an insulating sheet, a positive temperature coefficient thermistor having electrodes formed on both the upper and lower principal surfaces is inserted into the punching hole, and a positive temperature coefficient thermistor is inserted into the punching hole, and the peripheral edge of the insulation sheet is is sandwiched between the periphery of the upper electrode plate and the lower electrode plate in which a recessed portion for accommodating the positive temperature coefficient thermistor and the bimetal is formed, and the upper electrode plate and the lower electrode plate are fixed in an insulated state. A leaf spring is interposed between the electrode plate and the PTC thermistor, and the central part protrudes toward the upper electrode plate and the peripheral edge curves toward the upper electrode plate. The rear end of the bimetal, where the movable contact contacts and separates from the fixed contact provided on the lower electrode plate, is supported between the center of the leaf spring and the upper electrode plate and is electrically connected to the upper electrode plate. It is characterized in that heat from the characteristic thermistor is applied to the bimetal to maintain the off state of the movable contact relative to the fixed contact.
（実施例）
以下に、添付の図面を参照して本考案の実施例
を説明する。(Example) Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.
第１図ａから第１図ｃにおいて、１は上電極
板、２は下電極板、３は絶縁シート、４は正特性
サーミスタ、５は板バネ、６はバイメタルであ
る。 1a to 1c, 1 is an upper electrode plate, 2 is a lower electrode plate, 3 is an insulating sheet, 4 is a positive temperature coefficient thermistor, 5 is a leaf spring, and 6 is a bimetal.
上電極板１はその端子１ａとともに洋白等の金
属板（図示せず。）を打ち抜き、プレス加工によ
り、その周縁部にほぼ一定幅を残して一面から他
面に押し出し、上記正特性サーミスタ４、板バネ
５およびバイメタル６を収容する凹部７を形成し
たものである。 The upper electrode plate 1, together with its terminal 1a, is formed by punching out a metal plate (not shown) such as nickel silver or the like, and extruding it from one side to the other side by pressing, leaving a substantially constant width around the periphery, and forming the positive temperature coefficient thermistor 4. , a recess 7 for accommodating the leaf spring 5 and the bimetal 6 is formed.
上電極板１はその上記凹部７内に突出する突起
１ｂを有し、該突起１ｂの先端部に可動接点１１
を有するバイメタル６の後端部をスポツト熔接し
ている。 The upper electrode plate 1 has a protrusion 1b projecting into the recess 7, and a movable contact 11 is provided at the tip of the protrusion 1b.
The rear end portion of the bimetal 6 having a diameter is spot welded.
一方、下電極板２は、上電極板１と同様に、端
子２ａとともに洋白等の金属板（図示せず。）か
ら打ち抜いたものであつて、上電極板１の上記凹
部７とその周縁に重なるほぼ長方形状を有し、バ
イメタル６の先端部に設けた可動接点１１が離接
する固定接点１２を設けており、上記バイメタル
６は反転温度以下では第１図ｂに示すように、可
動接点１１が固定接点１２に圧接するように湾曲
している。 On the other hand, like the upper electrode plate 1, the lower electrode plate 2 is punched together with the terminal 2a from a metal plate such as nickel silver (not shown), and includes the recess 7 of the upper electrode plate 1 and its periphery. The bimetal 6 has a fixed contact 12 which has a substantially rectangular shape and which is connected to and separated from the movable contact 11 provided at the tip of the bimetal 6, and when the bimetal 6 is below the reversal temperature, as shown in FIG. 1b, the movable contact 12 11 is curved so as to come into pressure contact with the fixed contact 12.
絶縁シート３は上記下電極板２よりもやや大き
な寸法を有し、該絶縁シート３には抜き孔３ａを
設け、この抜き孔３ａに上下両主面に夫々電極４
ａ，４ｂを設けてなる正特性サーミスタ４を嵌入
し、上記絶縁シート３の周縁部は上電極板１と下
電極板２との間におけれて、第１図ｃに示すよう
に、上電極板１の対向する長辺を含む周縁部１
ｃ，１ｄを絶縁シート３とともに下電極板２の下
面側に折り曲げて、上電極板１と下電極板２とを
絶縁状態に固定している。 The insulating sheet 3 has a slightly larger dimension than the lower electrode plate 2, and the insulating sheet 3 is provided with punch holes 3a, and electrodes 4 are inserted into the punch holes 3a on both the upper and lower principal surfaces.
A positive temperature coefficient thermistor 4 having electrodes a and 4b is inserted, and the peripheral edge of the insulating sheet 3 is placed between the upper electrode plate 1 and the lower electrode plate 2, as shown in FIG. Peripheral portion 1 including opposing long sides of electrode plate 1
c and 1d are bent together with the insulating sheet 3 to the lower surface side of the lower electrode plate 2, thereby fixing the upper electrode plate 1 and the lower electrode plate 2 in an insulated state.
上記正特性サーミスタ４の電極４ａとバイメタ
ル６の後端部との間には、ステンレス等のバネ性
を有する金属からなる板バネ５を変形状態で介装
し、正特性サーミスタ４の電極４ａを板バネ５、
バイメタル６を介して上電極板１に、また、正特
性サーミスタ４の電極４ｂを下電極板２に夫々導
通させている。 A plate spring 5 made of a springy metal such as stainless steel is interposed between the electrode 4a of the positive temperature coefficient thermistor 4 and the rear end of the bimetal 6 in a deformed state. leaf spring 5,
The upper electrode plate 1 is electrically connected through the bimetal 6, and the electrode 4b of the positive temperature coefficient thermistor 4 is electrically connected to the lower electrode plate 2.
上記板バネ５は、中央部が上電極板１に向かつ
て突出するとともに、周縁部が上電極板１に向か
つて湾曲している。 The leaf spring 5 has a central portion that protrudes toward the upper electrode plate 1 and a peripheral portion that is curved toward the upper electrode plate 1.
上記上電極板１および下電極板２は、耐熱チユ
ーブ１３で被覆するとともに、その両端の開口を
たとえば熱溶着したり、および／または耐熱性を
有する封止剤（図示せず。）で封止すると安全性
がすぐれる。 The upper electrode plate 1 and the lower electrode plate 2 are covered with a heat-resistant tube 13, and the openings at both ends thereof are sealed by heat welding and/or with a heat-resistant sealant (not shown). This will improve safety.
また、上電極板１の端子１ａおよび下電極板２
の端子２ａには夫々耐熱被覆線１４および１５を
半田付けしている。 In addition, the terminal 1a of the upper electrode plate 1 and the lower electrode plate 2
Heat-resistant coated wires 14 and 15 are soldered to the terminals 2a, respectively.
上記のような構成を有する自己保持形サーマル
プロテクタを取り付けた電気機器（図示せず。）
に異常が生じて過熱すると、その熱はバイメタル
６に伝達され、該バイメタル６は反転し、可動接
点１１は固定接点１２から外れる。 Electrical equipment equipped with a self-holding thermal protector having the above configuration (not shown)
When an abnormality occurs and overheats, the heat is transferred to the bimetal 6, the bimetal 6 is reversed, and the movable contact 11 is separated from the fixed contact 12.
上記のように、可動接点１１が固定接点１２か
ら離れると、可動接点１１と固定接点１２とによ
る正特性サーミスタ４の電極４ａ，４ｂ間の短絡
が解除されることになり、正特性サーミスタ４に
は所定の通電が行なわれて発熱し、バイメタル６
を加熱する。このため、バイメタル６はその可動
接点１１が固定接点１２から離れた状態を保持
し、上記電気機器に流れる電流は正特性サーミス
タ４に流れる電流に制限される。 As mentioned above, when the movable contact 11 separates from the fixed contact 12, the short circuit between the electrodes 4a and 4b of the PTC thermistor 4 due to the movable contact 11 and the fixed contact 12 is released, and the PTC thermistor 4 is energized to a specified level and generates heat, making the bimetal 6
heat up. Therefore, the movable contact 11 of the bimetal 6 maintains a state separated from the fixed contact 12, and the current flowing through the electrical device is limited to the current flowing through the positive temperature coefficient thermistor 4.
上記バイメタル６を復帰させるには、正特性サ
ーミスタ４への通電を停止すればよい。 In order to restore the bimetal 6, the current supply to the positive temperature coefficient thermistor 4 may be stopped.
上記のようにすれば、正特性サーミスタ４は絶
縁シート３により上電極板１の凹部７内で安定に
位置決め固定され、振動や衝撃等が与えられて
も、正特性サーミスタ４の位置がズレるといつた
このをなくすことができる。 By doing the above, the PTC thermistor 4 is stably positioned and fixed within the recess 7 of the upper electrode plate 1 by the insulating sheet 3, and even if vibrations, shocks, etc. are applied, the position of the PTC thermistor 4 will not shift. When can you get rid of a callus?
（考案の効果）
以上、詳述したことから明らかなように、本考
案は、異常温度を検出して電路を遮断する自己保
持形サーマルプロテクタにおいて、上電極板と下
電極板の周縁部間に挟持される絶縁シートの抜き
孔に正特性サーミスタを嵌入するようにしたか
ら、正特性サーミスタは絶縁シートで位置決め固
定され、振動や衝撃が与えられても正特性サーミ
スタがズレることはなく、正特性サーミスタを定
位置に固定するための受座等を必要としない、安
価で小型の自己保持形サーマルプロテクタを得る
ことができる。(Effects of the invention) As is clear from the above detailed description, the present invention provides a self-holding thermal protector that detects abnormal temperature and interrupts the electrical circuit between the upper electrode plate and the lower electrode plate. Since the PTC thermistor is inserted into the hole in the sandwiched insulating sheet, the PTC thermistor is positioned and fixed by the insulating sheet, and even if vibration or impact is applied, the PTC thermistor will not shift, and the PTC thermistor will maintain the PTC thermistor's position. It is possible to obtain an inexpensive and small-sized self-holding thermal protector that does not require a seat or the like for fixing the thermistor in a fixed position.
また、本考案によれば、上電極板と下電極板と
が正特性サーミスタおよびバイメタルを収容する
ための実際上のケースの機能を有しているので、
これら上電極板および下電極板を通して、保護す
る電気機器の熱がバイメタルに効率よく伝達さ
れ、温度上昇に対して電気機器を確実に保護する
ことができる。 Further, according to the present invention, since the upper electrode plate and the lower electrode plate have the function of an actual case for accommodating the positive temperature coefficient thermistor and the bimetal,
The heat of the electrical equipment to be protected is efficiently transferred to the bimetal through the upper electrode plate and the lower electrode plate, and the electrical equipment can be reliably protected against temperature increases.
第１図ａは本考案に係る自己保持形サーマルプ
ロテクタの一実施例の平面図、第１図ｂは第１図
ａの自己保持形サーマルプロテクタの−線に
沿う断面図、第１図ｃは第１図ａの自己保持形サ
ーマルプロテクタの側面図である。
１……上電極板、２……下電極板、３……絶縁
シート、３ａ……抜き孔、４……正特性サーミス
タ、４ａ，４ｂ……電極、５……板バネ、６……
バイメタル、１１……可動接点、１２……固定接
点。
FIG. 1a is a plan view of an embodiment of the self-holding thermal protector according to the present invention, FIG. Figure 1a is a side view of the self-retaining thermal protector of Figure 1a; DESCRIPTION OF SYMBOLS 1... Upper electrode plate, 2... Lower electrode plate, 3... Insulating sheet, 3a... Hole, 4... Positive characteristic thermistor, 4a, 4b... Electrode, 5... Leaf spring, 6...
Bimetal, 11...movable contact, 12...fixed contact.
Claims (1)
上下両主面に夫々電極を形成してなる正特性サー
ミスタが嵌入され、上記絶縁シートの周縁部は正
特性サーミスタおよびバイメタルを収容する凹部
が形成されてなる上電極板と下電極板の周縁部と
の間に挟持されて上電極板と下電極板とが絶縁状
態に固定されており、上電極板と正特性サーミス
タとの間には中央部が上電極板に向かつて突出す
るとともに、周縁が上電極板に向かつて湾曲して
なる板バネが介装される一方、先端部に設けられ
た可動接点が下電極板に設けられた固定接点に離
接する上記バイメタルの後端部が上記板バネの中
央部と上電極板との間で支持されて上電極板に導
通しており、正特性サーミスタの熱を上記バイメ
タルに与えて可動接点の固定接点に対するオフ状
態を保持させるようにしたことを特徴とする自己
保持形サーマルプロテクタ。 A punching hole is provided in the insulating sheet, a positive temperature coefficient thermistor having electrodes formed on both the upper and lower main surfaces is inserted into the punching hole, and a recess for accommodating the positive temperature coefficient thermistor and the bimetal is formed at the periphery of the insulation sheet. The upper electrode plate and the lower electrode plate are sandwiched between the peripheral edges of the upper electrode plate and the lower electrode plate, and the upper electrode plate and the lower electrode plate are fixed in an insulated state, and the center A leaf spring is inserted in which the part protrudes toward the upper electrode plate and the peripheral edge curves toward the upper electrode plate, while the movable contact provided at the tip is fixed to the lower electrode plate. The rear end of the bimetal that comes into contact with and separates from the contact is supported between the center of the leaf spring and the upper electrode plate and is electrically connected to the upper electrode plate, and heat from the positive temperature coefficient thermistor is applied to the bimetal to make the movable contact. A self-holding type thermal protector characterized in that a fixed contact of the device is maintained in an OFF state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5979983U JPS59167438U (en) | 1983-04-21 | 1983-04-21 | Self-holding thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5979983U JPS59167438U (en) | 1983-04-21 | 1983-04-21 | Self-holding thermal protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59167438U JPS59167438U (en) | 1984-11-09 |
| JPH0217394Y2 true JPH0217394Y2 (en) | 1990-05-15 |
Family
ID=30190047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5979983U Granted JPS59167438U (en) | 1983-04-21 | 1983-04-21 | Self-holding thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59167438U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0834073B2 (en) * | 1988-04-05 | 1996-03-29 | 株式会社村田製作所 | Bimetal device |
| JP5941301B2 (en) * | 2012-03-06 | 2016-06-29 | 株式会社小松ライト製作所 | Breaker, safety circuit including the same, and secondary battery |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5332386A (en) * | 1976-09-07 | 1978-03-27 | Matsushita Electronics Corp | Thermal protector |
| JPS549752A (en) * | 1977-06-01 | 1979-01-24 | Texas Instruments Inc | Protecting device for motor |
-
1983
- 1983-04-21 JP JP5979983U patent/JPS59167438U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5332386A (en) * | 1976-09-07 | 1978-03-27 | Matsushita Electronics Corp | Thermal protector |
| JPS549752A (en) * | 1977-06-01 | 1979-01-24 | Texas Instruments Inc | Protecting device for motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59167438U (en) | 1984-11-09 |
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