JPH0512961Y2 - - Google Patents
Info
- Publication number
- JPH0512961Y2 JPH0512961Y2 JP1986039444U JP3944486U JPH0512961Y2 JP H0512961 Y2 JPH0512961 Y2 JP H0512961Y2 JP 1986039444 U JP1986039444 U JP 1986039444U JP 3944486 U JP3944486 U JP 3944486U JP H0512961 Y2 JPH0512961 Y2 JP H0512961Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrodes
- temperature coefficient
- positive temperature
- coefficient thermistor
- 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 - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 claims description 27
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
Description
【考案の詳細な説明】
〈産業上の利用分野〉
本考案は、発熱体に関し、正特性サーミスタ素
体の厚み方向の両主面に電極を設けると共に、正
特性サーミスタ素体の両側面に電極のそれぞれに
導通する側面電極を設けることにより、小型かつ
薄型で、取付けスペースが小さくて済み、しか
も、熱伝導性の良好な状態で面付けして使用し得
るようにしたものである。[Detailed description of the invention] <Industrial application field> The present invention relates to a heating element, in which electrodes are provided on both principal surfaces in the thickness direction of a positive temperature coefficient thermistor element, and electrodes are provided on both sides of the positive temperature coefficient thermistor element. By providing conductive side electrodes to each, the device is small and thin, requires less installation space, and can be used face-to-face with good thermal conductivity.
〈従来の技術〉
この種の発熱体は、用途に応じて、従来より
種々のタイプのものが提案され、実用に供されて
いる。この内、例えば８mmVTRシリンダまたは
デジタル．オーデイオ．テープ（以下DATと称
する）のシリンダ結露防止等に使用する場合に
は、できるだけ小型かつ薄型で、熱伝導性の良好
な発熱体が要求される。第７図〜第９図はこの種
の発熱体の従来例をそれぞれ示している。まず、
第７図の従来例では、平板状正特性サーミスタ素
体１の相対向する両側面に、対の電極２，３を設
け、この電極２，３に対して、正特性サーミスタ
素体１の厚み方向の両主面と平行する方向に導出
されるリード線４，５を、半田６，７等によつて
固着した構造となつている。<Prior Art> Various types of heating elements of this type have been proposed and put into practical use depending on the purpose. Among these, for example, 8mm VTR cylinder or digital. Audio. When used to prevent condensation on cylinders of tape (hereinafter referred to as DAT), a heating element that is as small and thin as possible and has good thermal conductivity is required. 7 to 9 respectively show conventional examples of this type of heating element. first,
In the conventional example shown in FIG. 7, a pair of electrodes 2 and 3 are provided on opposite sides of a flat positive temperature coefficient thermistor element 1, and the thickness of the positive temperature coefficient thermistor element 1 is It has a structure in which lead wires 4 and 5 led out in a direction parallel to both main surfaces of the device are fixed with solders 6 and 7 or the like.
次に第８図の従来例では、平板状正特性サーミ
スタ素体１の厚み方向の両主面に、電極２，３を
設けると共に、この電極２，３の表面上にリード
線４，５を半田６，７等によつて固着させた構造
となつている。 Next, in the conventional example shown in FIG. 8, electrodes 2 and 3 are provided on both main surfaces in the thickness direction of the flat positive temperature coefficient thermistor body 1, and lead wires 4 and 5 are provided on the surfaces of the electrodes 2 and 3. It has a structure in which it is fixed with solders 6, 7, etc.
第９図の従来例では、平板状正特性サーミスタ
素体１の厚み方向の一面に、ギヤツプＧを隔てて
対向する電極２，３を設けると共に、他面側には
共通電極８を設け、電極２，３にリード線４，５
を半田６，７によつて固着した構造となつてい
る。 In the conventional example shown in FIG. 9, electrodes 2 and 3 are provided on one surface in the thickness direction of a flat positive temperature coefficient thermistor body 1, facing each other with a gap G in between, and a common electrode 8 is provided on the other surface. Lead wires 4 and 5 to 2 and 3
It has a structure in which it is fixed with solders 6 and 7.
〈考案が解決しようとする課題〉
しかしながら、上述した従来の発熱体には、そ
れぞれ、次のような問題点がある。<Problems to be Solved by the Invention> However, each of the above-mentioned conventional heating elements has the following problems.
(イ) 第７図の従来例の場合、電極２，３の面積を
Ｓ、正特性サーミスタ素体１の電極２−３間の
厚みをｔとすると、電極２−３間の常温電気抵
抗Ｒは、
Ｒ＝（ｔ／Ｓ）．ρ
となる。ところが、薄型化するに当つて、板厚
ｈを小さくした場合、電極面積Ｓが小さくな
り、電極面積（ｔ／Ｓ）が大きくなる。このた
め、所望の電気抵抗Ｒを確保するのに、薄型化
する程、低抵抗材料を使用しなければならなく
なる。(a) In the case of the conventional example shown in FIG. 7, if the area of electrodes 2 and 3 is S, and the thickness between electrodes 2 and 3 of positive temperature coefficient thermistor body 1 is t, then the room temperature electric resistance R between electrodes 2 and 3 is is R=(t/S). ρ. However, when the plate thickness h is reduced in order to reduce the thickness, the electrode area S becomes smaller and the electrode area (t/S) becomes larger. Therefore, in order to ensure the desired electrical resistance R, the thinner the device is, the more it becomes necessary to use a low resistance material.
(ロ) 第８図の従来例では、放熱面となる板厚方向
の両主面にリード線４，５があるため、被加熱
体に対して面付けした場合、被加熱体と発熱体
との間にリード線４または５の太さだけの隙間
が発生し、熱伝導効率が悪くなる。(b) In the conventional example shown in Fig. 8, there are lead wires 4 and 5 on both main surfaces in the thickness direction that serve as heat dissipation surfaces. A gap as large as the thickness of the lead wire 4 or 5 is created between them, resulting in poor heat conduction efficiency.
(ハ) 第９図の従来例では、電極２−共通電極８に
よる正特性サーミスタ部分と、共通電極８−電
極３による正特性サーミスタ部分とを、直列に
接続した回路となる。この場合、両正特性サー
ミスタ部分の特性を完全にバランスさせること
は困難である。このため、動作時に片方のブロ
ツクだけが偏つて発熱動作をしてしまい、正特
性サーミスタ素体１の容積に対する熱効率が悪
くなる。(c) In the conventional example shown in FIG. 9, a positive temperature coefficient thermistor section formed by electrode 2 and common electrode 8 and a positive temperature coefficient thermistor section formed between common electrode 8 and electrode 3 are connected in series. In this case, it is difficult to perfectly balance the characteristics of both positive temperature coefficient thermistor parts. Therefore, during operation, only one block generates heat unevenly, and the thermal efficiency with respect to the volume of the PTC thermistor body 1 deteriorates.
そこで、本考案の課題は、小型かつ薄型で、取
付けスペースが小さくて済み、しかも、熱伝導性
の良好な状態で面付けして使用し得る発熱体を提
供することである。 Therefore, an object of the present invention is to provide a heating element that is small and thin, requires a small installation space, and can be used by mounting it face-to-face with good thermal conductivity.
〈課題を解決するための手段〉
上述した課題解決のため、本考案は、正の抵抗
温度特性を有する平板状正特性サーミスタ素体の
板厚方向にとられた両主面に電極を設けると共
に、前記正特性サーミスタ素体の相対する両側面
に前記電極のそれぞれに対して各別に導通する側
面電極を設けたことを特徴とする。<Means for Solving the Problems> In order to solve the above-mentioned problems, the present invention provides electrodes on both principal surfaces in the thickness direction of a flat positive temperature coefficient thermistor body having positive resistance-temperature characteristics. , characterized in that side electrodes are provided on opposing sides of the positive temperature coefficient thermistor body, each side electrode being electrically connected to each of the electrodes.
〈作用〉
平板状正特性サーミスタ素体の板厚方向の両主
面に電極を設けてあるから、板厚方向の両主面が
放熱面となる発熱体が得られ、板厚方向の平坦な
一主面側を被加熱体に密着して面付けできるよう
になり、被加熱体に対する伝熱効率が極めて良く
なる。<Operation> Since electrodes are provided on both principal surfaces in the thickness direction of the flat positive temperature coefficient thermistor body, a heating element with both principal surfaces in the thickness direction serving as heat dissipation surfaces can be obtained, and a flat positive temperature coefficient thermistor body in the thickness direction can be obtained. One main surface side can be placed in close contact with the object to be heated, and the heat transfer efficiency to the object to be heated can be extremely improved.
また、平板状正特性サーミスタ素体の板厚方向
にとられた両主面に電極を形成してあるから、薄
型化する程、電極間厚みと電極面積との比が小さ
くなる。このため、薄型化する程、電気抵抗値が
小さくなり、高抵抗材料でなる正特性サーミスタ
素体を使用できるようになる。 Furthermore, since the electrodes are formed on both main surfaces of the flat positive temperature coefficient thermistor body in the thickness direction, the ratio between the inter-electrode thickness and the electrode area becomes smaller as the thickness is reduced. Therefore, as the thickness is reduced, the electrical resistance value becomes smaller, and a positive temperature coefficient thermistor body made of a high resistance material can be used.
更に、正特性サーミスタ素体の相対する両側面
に電極のそれぞれに対して各別に導通する側面電
極を設けたから、側面電極にリード線を固着でき
る。このため、リード線の影響を受けずに、板厚
方向の平坦な一主面側を被加熱体に密着して面付
けできるようになり、被加熱体に対する伝熱効率
が向上する。 Furthermore, since side electrodes are provided on opposite sides of the positive temperature coefficient thermistor body, each of which is electrically connected to each electrode, lead wires can be fixed to the side electrodes. Therefore, one flat main surface side in the plate thickness direction can be closely attached to the object to be heated without being affected by the lead wire, and the heat transfer efficiency to the object to be heated can be improved.
〈実施例〉
第１図は本考案に係る発熱体の斜視図である。
この実施例では、矩形平板状に形成された正特性
サーミスタ素体１の板厚方向の両主面１０１，１
０２に、電極２，３を設けると共に、正特性サー
ミスタ素体１の長さ方向において相対向する両側
面の略全面に、電極２の一端縁から連続する側面
電極９、及び、電極３の一端縁から連続する側面
電極１０をそれぞれ形成してある。電極２の他端
縁と側面電極１０との間、及び、電極３の他端縁
と側面電極９との間には、それぞれ、ギヤツプ
G1，G2が形成されており、電極２，３はこれら
のギヤツプG1，G2によつて電気的に互いに絶縁
されている。<Example> FIG. 1 is a perspective view of a heating element according to the present invention.
In this embodiment, both main surfaces 101, 1 in the plate thickness direction of a positive temperature coefficient thermistor element 1 formed in a rectangular flat plate shape are shown.
02 is provided with electrodes 2 and 3, and a side electrode 9 continuous from one edge of the electrode 2 and one end of the electrode 3 is provided on substantially the entire surface of both side surfaces facing each other in the length direction of the PTC thermistor element body 1. Side electrodes 10 are formed that are continuous from the edges. A gap is provided between the other edge of the electrode 2 and the side electrode 10, and between the other edge of the electrode 3 and the side electrode 9.
G 1 and G 2 are formed, and the electrodes 2 and 3 are electrically insulated from each other by these gaps G 1 and G 2 .
上記実施例の発熱体は、電極２，３を形成した
板厚方向の両主面１０１，１０２が平坦な発熱面
となる。従つて、主面１０１，１０２の何れか
を、被加熱体に面付けすることにより、効率よく
加熱できる。 In the heating element of the above embodiment, both main surfaces 101 and 102 in the thickness direction on which the electrodes 2 and 3 are formed are flat heating surfaces. Therefore, heating can be performed efficiently by attaching either of the principal surfaces 101 or 102 to the object to be heated.
また、正特性サーミスタ素体１の板厚をｔ、電
極２，３の面積をＳとした場合、板厚ｔを小さく
して薄型化する程、電極間厚みｔと電極面積Ｓと
の比（ｔ／Ｓ）が小さくなる。このため、薄型化
する程、電極抵抗Ｒが小さくなり、高抵抗材料で
なる正特性サーミスタ素体を使用できるようにな
る。 In addition, if the thickness of the PTC thermistor body 1 is t and the area of the electrodes 2, 3 is S, the thinner the body is made by reducing the thickness t, the smaller the ratio (t/S) of the inter-electrode thickness t to the electrode area S. Therefore, the thinner the body is made, the smaller the electrode resistance R becomes, making it possible to use a PTC thermistor body made of a high resistance material.
第２図は放熱板との組合せでなる発熱体の具体
例を示す斜視図、第３図は同じくその断面図であ
る。この実施例では、アルミニユウム板等の熱伝
導性の良好な放熱体１２の一面上に、電極３側を
面付けしてある。放熱体１２の一面上には、予
め、絶縁層１３をコーテイングしてあつて、この
絶縁層１３及び絶縁性接着剤１４を介して、電極
３の表面を放熱体１２の表面に面付けしてある。
また、正特性サーミスタ素体１の側面に設けた側
面電極９，１０にはリード線４，５を接続固定し
てある。リード線４，５は正特性サーミスタ素体
１の板厚方向の両主面１０１，１０２と平行する
方向に配置され、導電性接着剤１５，１６によつ
て、側面電極９，１０に接続固定してある。この
実施例で、導電性接着剤１５，１６は側面電極
９，１０から絶縁層１３にかけて付着させてあ
る。 FIG. 2 is a perspective view showing a specific example of a heating element combined with a heat sink, and FIG. 3 is a sectional view thereof. In this embodiment, the electrode 3 side is placed on one surface of a heat sink 12 having good thermal conductivity, such as an aluminum plate. An insulating layer 13 is coated on one surface of the heat sink 12 in advance, and the surface of the electrode 3 is attached to the surface of the heat sink 12 via this insulating layer 13 and an insulating adhesive 14. be.
Further, lead wires 4 and 5 are connected and fixed to side electrodes 9 and 10 provided on the side surfaces of the PTC thermistor body 1. The lead wires 4 and 5 are arranged in a direction parallel to both main surfaces 101 and 102 in the thickness direction of the PTC thermistor body 1, and are connected and fixed to the side electrodes 9 and 10 by conductive adhesives 15 and 16. It has been done. In this embodiment, conductive adhesives 15 and 16 are applied from the side electrodes 9 and 10 to the insulating layer 13.
第２図及び第３図に示す実施例の場合、リード
線４，５を、側面に設けた側面電極９，１０に接
続固定してあるから、リード線４，５の線径等の
影響を受けることなく、放熱面となる電極３側を
放熱体１２に対して密着して面付けでき、放熱体
１２に対する伝熱効率が良くなる。 In the case of the embodiment shown in FIGS. 2 and 3, the lead wires 4 and 5 are connected and fixed to the side electrodes 9 and 10 provided on the side surfaces, so that the influence of the wire diameter etc. of the lead wires 4 and 5 is avoided. The electrode 3 side serving as a heat dissipation surface can be placed in close contact with the heat dissipation body 12 without being exposed to heat, and the heat transfer efficiency to the heat dissipation body 12 is improved.
第４図は本考案に係る発熱体の別の実施例にお
ける斜視図、第５図は同じくその断面図である。
この実施例では、正特性サーミスタ素体１の幅方
向の両側面に側面電極９，１０を設けると共に、
側面電極９，１０のそれぞれに対して、予め、リ
ード線４，５を半田付け１５，１６等の手段によ
つて接続固定してある。 FIG. 4 is a perspective view of another embodiment of the heating element according to the present invention, and FIG. 5 is a sectional view thereof.
In this embodiment, side electrodes 9 and 10 are provided on both sides of the PTC thermistor body 1 in the width direction, and
Lead wires 4 and 5 are connected and fixed in advance to side electrodes 9 and 10, respectively, by means such as soldering 15 and 16.
第６図は第４図及び第５図に示した発熱体の取
付け状態を示す図で、被加熱体または放熱体１８
の表面に、絶縁性接着剤１７を用いて、電極３側
を面付け固定してある。 FIG. 6 is a diagram showing how the heating element shown in FIG. 4 and FIG.
The electrode 3 side is fixed on the surface using an insulating adhesive 17.
〈考案の効果〉
以上述べたように、本考案によれば、次のよう
な効果を得ることができる。<Effects of the invention> As described above, according to the present invention, the following effects can be obtained.
(a) 平板状正特性サーミスタ素体の板厚方向の両
主面に電極を設けてあるから、板厚方向の両主
面が放熱面となる発熱体が得られ、板厚方向の
平坦な一主面側を被加熱体に密着して面付けで
き、被加熱体に対する伝熱効率が極めて良好な
発熱体を提供できる。(a) Since electrodes are provided on both principal surfaces in the thickness direction of the flat positive temperature coefficient thermistor element, a heating element is obtained in which both principal surfaces in the thickness direction serve as heat dissipation surfaces. It is possible to provide a heating element whose one principal surface side can be closely attached to a heated object and which has extremely good heat transfer efficiency to the heated object.
(b) 平板状正特性サーミスタ素体の板厚方向にと
られた両主面に電極を形成してあるから、薄型
化する程、電気抵抗値が小さくなり、高抵抗材
料でなる正特性サーミスタ素体を使用し得るよ
うになる。(b) Since electrodes are formed on both main surfaces of the flat positive temperature coefficient thermistor body in the thickness direction, the electrical resistance value decreases as the thickness becomes thinner, making it a positive temperature coefficient thermistor made of high resistance material. You will be able to use the elemental body.
(c) 正特性サーミスタ素体の相対する両側面に電
極のそれぞれに対して各別に導通する側面電極
を設けたから、リード線の影響を受けずに、板
厚方向の平坦な一主面を被加熱体に密着して面
付けでき、被加熱体に対する伝熱効率の高い発
熱体を提供できる。(c) Since side electrodes are provided on opposite sides of the positive temperature coefficient thermistor body, each of which conducts electrically to each electrode, it is possible to cover one flat main surface in the plate thickness direction without being affected by the lead wire. It is possible to provide a heating element that can be closely attached to the heating element and has high heat transfer efficiency to the heating element.
第１図は本考案に係る発熱体の斜視図、第２図
は放熱板との組合せでなる発熱体の具体例を示す
斜視図、第３図は同じくその断面図、第４図は本
考案に係る発熱体の別の実施例における斜視図、
第５図は同じくその断面図、第６図は第４図及び
第５図に示した発熱体の取付け状態を示す断面
図、第７図は従来の発熱体の斜視図、第８図は同
じく別の従来例における断面図、第９図は更に別
の従来例における断面図をそれぞれ示しているで
ある。
１……正特性サーミスタ素体、２，３……電
極、９，１０……側面電極。
Fig. 1 is a perspective view of a heating element according to the present invention, Fig. 2 is a perspective view showing a specific example of a heating element combined with a heat sink, Fig. 3 is a sectional view thereof, and Fig. 4 is a perspective view of the heating element according to the invention. A perspective view of another example of the heating element according to
Fig. 5 is a sectional view of the same, Fig. 6 is a sectional view showing the installation state of the heating element shown in Figs. 4 and 5, Fig. 7 is a perspective view of the conventional heating element, and Fig. 8 is the same. FIG. 9 is a cross-sectional view of another conventional example, and FIG. 9 is a cross-sectional view of still another conventional example. 1... Positive temperature coefficient thermistor element, 2, 3... Electrode, 9, 10... Side electrode.
Claims (1)
られた両主面に電極を設けると共に、前記正特
性サーミスタ素体の相対する両側面に前記電極
のそれぞれに対して各別に導通する側面電極を
設けたことを特徴とする発熱体。 (2) 前記側面電極は、前記正特性サーミスタ素体
の板厚方向の両面と平行する方向に引出される
リード線が接続固定されていることを特徴とす
る実用新案登録請求の範囲第１項に記載の発熱
体。[Claims for Utility Model Registration] (1) Electrodes are provided on both main surfaces taken in the thickness direction of a flat positive temperature coefficient thermistor element, and electrodes are provided on both opposing sides of the positive temperature coefficient thermistor element. A heating element characterized in that a side electrode is provided that conducts electricity to each side separately. (2) The side electrode is connected to and fixed to a lead wire drawn out in a direction parallel to both surfaces of the positive temperature coefficient thermistor body in the thickness direction. The heating element described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986039444U JPH0512961Y2 (en) | 1986-03-18 | 1986-03-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986039444U JPH0512961Y2 (en) | 1986-03-18 | 1986-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62151701U JPS62151701U (en) | 1987-09-26 |
| JPH0512961Y2 true JPH0512961Y2 (en) | 1993-04-06 |
Family
ID=30852613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986039444U Expired - Lifetime JPH0512961Y2 (en) | 1986-03-18 | 1986-03-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0512961Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59191708U (en) * | 1983-06-03 | 1984-12-19 | 松下電器産業株式会社 | chip barista |
-
1986
- 1986-03-18 JP JP1986039444U patent/JPH0512961Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62151701U (en) | 1987-09-26 |
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