JPH03283602A - Resistor with built-in temperature fuse - Google Patents
Resistor with built-in temperature fuseInfo
- Publication number
- JPH03283602A JPH03283602A JP8539790A JP8539790A JPH03283602A JP H03283602 A JPH03283602 A JP H03283602A JP 8539790 A JP8539790 A JP 8539790A JP 8539790 A JP8539790 A JP 8539790A JP H03283602 A JPH03283602 A JP H03283602A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- temperature fuse
- focus
- wall
- temperature
- 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
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000005856 abnormality Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Thermistors And Varistors (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、電源回路等に用いられる温度ヒユーズ内蔵形
抵抗器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a resistor with a built-in temperature fuse used in power supply circuits and the like.
従来の温度ヒユーズ内蔵形抵抗器として、第３図のもの
がある。このものは、ケースｌ内に抵抗器２と温度ヒユ
ーズ３を平行に隣接して収納するとともに、ケース１内
の斜線で示した空間を樹脂等で固めた構造になっている
。As a conventional resistor with a built-in temperature fuse, there is one shown in FIG. This device has a structure in which a resistor 2 and a temperature fuse 3 are housed in parallel and adjacent to each other in a case 1, and a space shown by diagonal lines in the case 1 is solidified with resin or the like.
その作用は、例えばこの温度ヒユーズ内蔵形抵抗器を介
して電力をある回路へ供給するような使い方をした場合
、回路に異常が発生した際、抵抗器２に過電流が流れて
過熱し、その熱が熱伝導によって温度ヒユーズ３の温度
を上昇させる。この温度が溶断点に達すると温度ヒユー
ズ３は溶断し、回路への電力供給を停止する。For example, if a resistor with a built-in temperature fuse is used to supply power to a certain circuit, and an abnormality occurs in the circuit, an overcurrent will flow through resistor 2, causing it to overheat. The heat increases the temperature of the temperature fuse 3 by thermal conduction. When this temperature reaches the melting point, the temperature fuse 3 is blown and power supply to the circuit is stopped.
上記した従来の温度ヒユーズ内蔵形抵抗器にあっては、
回路に異常が発生した際の熱検知が抵抗器２から温度ヒ
ユーズ３への熱伝導にのみ依存しているため反応が遅く
、回路の被害の拡大につながる恐れがあった。また、熱
検知の反応を速くするために抵抗器２と温度ヒユーズ３
を接近させると、その間の耐電圧値が低下するという問
題点もあった。In the conventional resistor with built-in temperature fuse mentioned above,
Since heat detection when an abnormality occurs in the circuit depends only on heat conduction from the resistor 2 to the temperature fuse 3, the reaction is slow and there is a fear that damage to the circuit may increase. Also, in order to speed up the reaction of heat detection, resistor 2 and temperature fuse 3 are connected.
There is also the problem that when the two are placed close to each other, the withstand voltage value between them decreases.
本発明は、上記事由に鑑みてなしたもので、その目的と
するところは、温度ヒユーズの熱検知速度を向上させて
回路の被害を最小に抑えるとともに、抵抗器と温度ヒユ
ーズとの間の耐電圧値にも優れた温度ヒユーズ内蔵形抵
抗器を提供することにある。The present invention has been made in view of the above reasons, and its purpose is to minimize damage to the circuit by improving the heat detection speed of the temperature fuse, and to improve the resistance between the resistor and the temperature fuse. An object of the present invention is to provide a resistor with a built-in temperature fuse that also has an excellent voltage value.
上記した課題を解決するために、本発明の温度ヒユーズ
内蔵形抵抗器は、ケースの内壁の断面が楕円をなす筒状
のもので、その楕円の一方の焦点に抵抗器を、他方の焦
点に温度ヒユーズを配設した構成にしている。In order to solve the above problems, the temperature fuse built-in resistor of the present invention has a cylindrical case whose inner wall has an elliptical cross section, and the resistor is placed at one focus of the ellipse, and the resistor is placed at the other focus of the ellipse. The structure is equipped with a temperature fuse.
（作用）
本発明によれば、ケースは内壁の断面が楕円をなす筒状
のものに形成され、抵抗器がその楕円の一方の焦点に、
温度ヒユーズが他方の焦点に配設されているので、抵抗
器から放射した熱線は、内壁で反射して温度ヒユーズに
集中するため、温度ヒユーズの温度上昇は象、激に起こ
り、短時間で温度ヒユーズは溶断し、また輻射熱を利用
することになるので、抵抗器と温度ヒユーズとは接近さ
せる必要がなく耐電圧にも優れたものとなる。(Function) According to the present invention, the case is formed into a cylindrical shape whose inner wall has an elliptical cross section, and the resistor is located at one focal point of the ellipse.
Since the temperature fuse is placed at the other focal point, the heat rays emitted from the resistor are reflected on the inner wall and concentrated on the temperature fuse, so the temperature of the temperature fuse increases rapidly, and the temperature decreases in a short period of time. Since the fuse blows and radiant heat is used, there is no need for the resistor and temperature fuse to be close to each other, resulting in excellent withstand voltage.
【実施例〕
本発明の一実施例を第１図及び第２図に基づいて以下に
説明する。なお、従来例のものと同一名称の部材には同
一の符号を付す。[Embodiment] An embodiment of the present invention will be described below based on FIGS. 1 and 2. Note that members having the same names as those of the conventional example are given the same reference numerals.
ケース１は、内壁１ａの断面が楕円をなす筒状に形成し
てあり、その内壁１ａの表面は熱反射が良好なように処
理が施されている。そして、抵抗器２がその楕円の一方
の焦点に、温度ヒユーズ３が他方の焦点に配設されるよ
う、それぞれの部材が外部へ導出するケース１の部分（
図示せず）に適宜係止穴等を設けて固定されている。The case 1 is formed into a cylindrical shape with an inner wall 1a having an elliptical cross section, and the surface of the inner wall 1a is treated to have good heat reflection. Then, the portion of the case 1 where each member is led out (
(not shown) with suitable locking holes or the like.
かかる温度ヒユーズ内蔵形抵抗器にあっては、ケースｌ
は内壁の断面が楕円をなす筒状のものに形成されている
ので、第２図に示すように、その楕円の一方の焦点に位
置する抵抗器２から放射した熱線は、熱反射の良好な内
壁１ａで反射して他方の焦点に位置する温度ヒユーズ３
に集中するため、温度ヒユーズ３の温度上昇は急激に起
こり、短時間で温度ヒユーズ３は溶断する。また、輻射
熱を利用するので抵抗器２と温度ヒユーズ３との間隔つ
まり絶縁距離は充分に確保できる。For such a resistor with a built-in temperature fuse, the case l
is formed into a cylindrical shape with an elliptical inner wall cross-section, so the heat rays radiated from the resistor 2 located at one focal point of the ellipse are directed through a tube with good heat reflection, as shown in Figure 2. Temperature fuse 3 reflected from inner wall 1a and located at the other focal point
As a result, the temperature of the temperature fuse 3 rapidly increases, and the temperature fuse 3 is blown out in a short period of time. Furthermore, since radiant heat is utilized, a sufficient distance between the resistor 2 and the temperature fuse 3, that is, the insulation distance can be ensured.
本発明は、上記のように、ケースは内壁の断面が楕円を
なす筒状のものに形成され、抵抗器がその楕円の一方の
焦点に、温度ヒユーズが他方の焦点に配設されて構成し
ているので、抵抗器から放射した熱線は内壁で反射して
温度ヒユーズに集中スルため、温度ヒユーズの熱検知速
度が向上して回路の被害を最小に抑えるとともに、輻射
熱を利用するので抵抗器と温度ヒユーズとの間隔が充分
に確保できてその間の耐電圧値にも優れた温度ヒユーズ
内蔵形抵抗器を提供することができる。In the present invention, as described above, the case is formed into a cylindrical shape with an elliptical inner wall cross section, the resistor is arranged at one focal point of the ellipse, and the temperature fuse is arranged at the other focal point. Since the heat rays radiated from the resistor are reflected off the inner wall and concentrated on the temperature fuse, the heat detection speed of the temperature fuse is improved and damage to the circuit is minimized. It is possible to provide a resistor with a built-in temperature fuse that can secure a sufficient distance from the temperature fuse and has an excellent withstand voltage value therebetween.
第１図は、本発明の一実施例を示す部分断面斜視図、
第２図は、同上の断面図、
第３図（ａ）は、従来例を示す平面断面図、第３図（ｂ
）は、同上の正面断面図である。
１−ケース、１ａ・・・内壁、
２・−抵抗器、
３・・・温度ヒユーズ。FIG. 1 is a partially sectional perspective view showing an embodiment of the present invention, FIG. 2 is a sectional view of the same as above, FIG. 3(a) is a plan sectional view showing a conventional example, and FIG.
) is a front sectional view of the same as above. 1-Case, 1a...Inner wall, 2-Resistor, 3...Temperature fuse.
Claims (1)
温度ヒューズ内蔵形抵抗器において、前記ケースは、内
壁の断面が楕円をなす筒状のもので、その楕円の一方の
焦点に抵抗器を、他方の焦点に温度ヒューズを配設した
ことを特徴とする温度ヒューズ内蔵形抵抗器。(1) In a resistor with a built-in thermal fuse, in which a thermal fuse is housed in a case along with the resistor, the case has a cylindrical shape with an inner wall having an elliptical cross section, and the resistor is placed at one focal point of the ellipse. A resistor with a built-in thermal fuse, characterized in that a thermal fuse is provided at the other focal point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8539790A JP2751548B2 (en) | 1990-03-30 | 1990-03-30 | Resistor with built-in thermal fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8539790A JP2751548B2 (en) | 1990-03-30 | 1990-03-30 | Resistor with built-in thermal fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03283602A true JPH03283602A (en) | 1991-12-13 |
| JP2751548B2 JP2751548B2 (en) | 1998-05-18 |
Family
ID=13857642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8539790A Expired - Fee Related JP2751548B2 (en) | 1990-03-30 | 1990-03-30 | Resistor with built-in thermal fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2751548B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1603146A1 (en) * | 2004-06-04 | 2005-12-07 | The European Community, represented by the European Commission | Temperature sensitive safety device for systems susceptible of overheating |
| JP5014524B1 (en) * | 2009-04-21 | 2012-08-29 | スマート エレクトロニクス インク | Thermal fuse resistor |
| CN104903989A (en) * | 2012-11-26 | 2015-09-09 | 斯玛特电子公司 | Combined overcurrent protection device for blocking current and voltage in abnormal conditions |
-
1990
- 1990-03-30 JP JP8539790A patent/JP2751548B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1603146A1 (en) * | 2004-06-04 | 2005-12-07 | The European Community, represented by the European Commission | Temperature sensitive safety device for systems susceptible of overheating |
| JP5014524B1 (en) * | 2009-04-21 | 2012-08-29 | スマート エレクトロニクス インク | Thermal fuse resistor |
| CN104903989A (en) * | 2012-11-26 | 2015-09-09 | 斯玛特电子公司 | Combined overcurrent protection device for blocking current and voltage in abnormal conditions |
| JP2016504717A (en) * | 2012-11-26 | 2016-02-12 | スマート エレクトロニクス インク | Composite protective element that cuts off current and voltage in abnormal state |
| US9607795B2 (en) | 2012-11-26 | 2017-03-28 | Smart Electronics Inc. | Complex protection device for blocking abnormal state of current and voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2751548B2 (en) | 1998-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |