JPH07147186A - Ptc heater wire - Google Patents

Ptc heater wire

Info

Publication number
JPH07147186A
JPH07147186A JP29358993A JP29358993A JPH07147186A JP H07147186 A JPH07147186 A JP H07147186A JP 29358993 A JP29358993 A JP 29358993A JP 29358993 A JP29358993 A JP 29358993A JP H07147186 A JPH07147186 A JP H07147186A
Authority
JP
Japan
Prior art keywords
insulating layer
electrodes
marking
heater wire
linear
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.)
Withdrawn
Application number
JP29358993A
Other languages
Japanese (ja)
Inventor
Koji Takagi
光司 高木
Shinobu Ikeno
忍 池野
Naohito Fukuya
直仁 福家
Hiroko Morita
裕子 森田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP29358993A priority Critical patent/JPH07147186A/en
Publication of JPH07147186A publication Critical patent/JPH07147186A/en
Withdrawn legal-status Critical Current

Links

Abstract

PURPOSE:To find the positional relation of two linear electrodes from the appearance, in a PTC heater wire having nearly a circular section, by marking the outer circumferential part of an outside insulating layer situated substantially in an equal distance from a pair of electrodes in the inner part. CONSTITUTION:A pair of linear electrodes 5, 5 are arranged and enclosed with a fixed space in a linear heating member 3 which is a PTC material (a heating material having a positive resistance-temperature coefficient), and the outer circumference is covered with a substantially circular insulating layer 4. A groove 6 is formed in the outer circumferential part of the heating member 3 situated substantially in an equal distance from the electrodes 5, 5 and in the corresponding outer circumferential part of the insulating layer 4, and the groove of the insulating layer outer circumferential part is externally confirmed as a marking 7. Since a wire is distributed so that the line connecting the center positions of the electrodes 5 orthogonally crosses the load direction, thus, it is prevented that the space between the electrodes 5, 5 is narrowed to reduce the resistance value, which is easy to cause a short circuit. The marking 7 may be a insulation formed on the insulating layer 4.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、例えば電気カーペット
や電気毛布に使用されるPTCヒータ線(自己温度制御
型発熱線)に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PTC heater wire (self-temperature control type heating wire) used for, for example, an electric carpet or an electric blanket.

【0002】[0002]

【従来の技術】従来、PTCヒータ線には、ポリエチレ
ン、ポリプロピレン等の結晶性樹脂とカーボンブラッ
ク、グラファイト等の導電性粒子とからなる抵抗−温度
係数が正の発熱材(PTC材)が使用されている。そし
て、電気カーペットや電気毛布等の用途では、配線後の
厚みの均一性が重要であることから、PTCヒータ線の
断面形状を略円形状にすることが一般的である。(円形
状でない場合にはPTCヒータ線をターンして配線する
部分で厚みが変動しやすい)図4に断面が略円形状であ
る従来のPTCヒータ線の一部破断斜視図を示す。図4
に示すように、従来のPTCヒータ線は、PTC材であ
る線状発熱材3内に、絶縁性芯材1にスパイラル状に銅
線等の金属導体2が巻かれてなる一対の線状電極5,5
が互いの間に一定間隔をおいて平行に配置され包埋され
ていて、かつ、線状発熱材3の外周が合成樹脂等からな
る絶縁層4で被覆されていて、その断面の外周形状は略
円形状に形成されている。
2. Description of the Related Art Conventionally, a PTC heater wire is made of a heat generating material (PTC material) having a positive resistance-temperature coefficient, which is made of a crystalline resin such as polyethylene or polypropylene and conductive particles such as carbon black or graphite. ing. In applications such as electric carpets and electric blankets, the uniformity of the thickness after wiring is important, so that the cross-sectional shape of the PTC heater wire is generally circular. (If the PTC heater wire is not circular, the thickness is likely to vary at the portion where the PTC heater wire is turned and wired.) FIG. 4 is a partially cutaway perspective view of a conventional PTC heater wire having a substantially circular cross section. Figure 4
As shown in FIG. 1, a conventional PTC heater wire is a pair of linear electrodes in which a metal conductor 2 such as a copper wire is spirally wound around an insulating core material 1 in a linear heating material 3 which is a PTC material. 5,5
Are arranged and embedded in parallel with each other at regular intervals, and the outer periphery of the linear heating material 3 is covered with an insulating layer 4 made of synthetic resin or the like, and the outer peripheral shape of its cross section is It is formed in a substantially circular shape.

【0003】図4に示すような断面が略円形状のPTC
ヒータ線を電気カーペット内に配線した場合には、PT
Cヒータ線の外観からは内部の一対の線状電極5,5の
位置関係を確認できないために、その位置関係は各配線
場所でランダムとなっている。そのため、例えば電気カ
ーペット等において上下方向に外部から荷重が加わった
場合に、荷重が加わった場所によって抵抗値が変動する
という問題があった。すなわち、図5(a)に示すよう
に荷重方向(矢印の方向)に対し各線状電極5,5の中
心位置を結ぶ線が直交する場合と、図5(b)に示すよ
うに荷重方向に対し各線状電極5,5の中心位置を結ぶ
線が一致する場合等の線状電極5,5の位置関係の変動
が配線場所によって生じている。そして、図5(b)に
示す場合には荷重により線状電極5,5の間隔が狭くな
り、抵抗値が低下し、その結果図5(a)の場合に比べ
短絡の可能性が大きくなるという問題があった。
A PTC having a substantially circular cross section as shown in FIG.
If you wire the heater wire inside the electric carpet,
Since the positional relationship between the pair of linear electrodes 5 and 5 inside cannot be confirmed from the appearance of the C heater wire, the positional relationship is random at each wiring place. Therefore, for example, when a load is applied from the outside in the vertical direction on an electric carpet or the like, there is a problem that the resistance value varies depending on the place where the load is applied. That is, when the line connecting the center positions of the linear electrodes 5 and 5 is orthogonal to the load direction (the direction of the arrow) as shown in FIG. 5A, and when the line is connected in the load direction as shown in FIG. 5B. On the other hand, the positional relationship between the linear electrodes 5 and 5 varies depending on the wiring location, such as when the lines connecting the central positions of the linear electrodes 5 and 5 coincide with each other. Then, in the case shown in FIG. 5B, the interval between the linear electrodes 5 and 5 is narrowed due to the load, and the resistance value is lowered. As a result, the possibility of short circuit is increased as compared with the case of FIG. 5A. There was a problem.

【0004】[0004]

【発明が解決しようとする課題】本発明は、このような
事情に鑑みて、荷重方向に対する各線状電極の位置関係
を一目瞭然に知るようにすることで、例えば図5(a)
に示すように荷重方向に対し各線状電極5,5の中心位
置を結ぶ線が直交するような配線が常にできるようにす
ることを狙いとしてなされたものである。具体的には、
略円形状のPTCヒータ線を配線する場合に、内部に包
埋されている一対の線状電極の位置関係がその外観から
確認できるPTCヒータ線を提供することを目的とす
る。
In view of such a situation, the present invention makes it possible to clearly understand the positional relationship of each linear electrode with respect to the load direction, for example, as shown in FIG.
As shown in (1), the purpose is to always provide wiring in which the line connecting the center positions of the linear electrodes 5, 5 is orthogonal to the load direction. In particular,
An object of the present invention is to provide a PTC heater wire in which, when wiring a substantially circular PTC heater wire, the positional relationship between a pair of linear electrodes embedded inside can be confirmed from its appearance.

【0005】[0005]

【課題を解決するための手段】この発明に係るPTCヒ
ータ線は、抵抗−温度係数が正の線状発熱材3内に、そ
の軸方向に沿って、一対の線状電極5,5が互いの間に
一定間隔をおいて平行に配置され包埋されていて、か
つ、線状発熱材3の外周が絶縁層4で被覆されている、
断面が略円形状のPTCヒータ線において、前記の一対
の線状電極5,5から略同一距離にある少なくとも一方
の、前記絶縁層4の外周部にマーキング7が施されてい
ることを特徴としている。
In the PTC heater wire according to the present invention, a pair of linear electrodes 5 and 5 are arranged along the axial direction in a linear heating material 3 having a positive resistance-temperature coefficient. Are arranged in parallel with each other at a constant interval and embedded, and the outer periphery of the linear heating material 3 is covered with an insulating layer 4.
In a PTC heater wire having a substantially circular cross section, a marking 7 is provided on an outer peripheral portion of the insulating layer 4 at least one of which is at substantially the same distance from the pair of linear electrodes 5 and 5. There is.

【0006】そして、マーキング7は絶縁層4に形成さ
れた溝6または着色線8であることが好ましい。
The marking 7 is preferably a groove 6 or a colored line 8 formed in the insulating layer 4.

【0007】[0007]

【作用】マーキング7は線状電極5,5から略同一距離
にある絶縁層4の外周部に施されているので、マーキン
グ7をPTCヒータ線の頂上位置もしくは底の位置に来
るように配線することにより、図5(a)に示すよう
な、荷重方向(通常は上下方向)に対し各線状電極5,
5の中心位置を結ぶ線が直交するように配線できるよう
になる。このように配線することで、図5(b)に示す
ような荷重方向に対し各線状電極5,5の中心位置を結
ぶ線が一致していて、荷重により線状電極5,5の間隔
が狭くなり、抵抗値が低下して、短絡が生じ易くなるこ
とを防止できるようになる。
Since the marking 7 is provided on the outer peripheral portion of the insulating layer 4 which is approximately the same distance from the linear electrodes 5 and 5, the marking 7 is wired so as to come to the top position or the bottom position of the PTC heater wire. As a result, as shown in FIG. 5A, the linear electrodes 5, 5 with respect to the load direction (usually the vertical direction) are
Wiring can be performed so that the lines connecting the center positions of 5 are orthogonal to each other. By wiring in this way, the line connecting the center positions of the linear electrodes 5 and 5 coincides with the load direction as shown in FIG. 5B, and the spacing between the linear electrodes 5 and 5 is increased by the load. It becomes possible to prevent the width from becoming narrower and the resistance value lowering so that a short circuit is easily caused.

【0008】また、マーキング7が絶縁層4に形成され
た溝6である場合にはマーキング7が巻取り等の外力で
消えることがなく、着色線8である場合には、マーキン
グ7の形成により絶縁層4の外周形状が影響を受けるこ
とが少ない。
When the marking 7 is the groove 6 formed in the insulating layer 4, the marking 7 is not erased by an external force such as winding, and when it is the colored line 8, the marking 7 is formed. The outer peripheral shape of the insulating layer 4 is rarely affected.

【0009】[0009]

【実施例】以下、本発明の実施例を図1〜図3に基づい
て説明する。
Embodiments of the present invention will be described below with reference to FIGS.

【0010】図1は第1実施例に係る断面図である。図
1に示すようにPTCヒータ線は、PTC材である線状
発熱材3内に、絶縁性芯材1に金属導体2が巻かれてい
る一対の線状電極5,5が互いの間に一定間隔をおいて
平行に配置され包埋されていて、かつ、線状発熱材3の
外周が絶縁層4で被覆されていて、PTCヒータ線断面
の外周形状は略円形状に形成されている。そして、前記
の一対の線状電極5,5から略同一距離にある一方の、
前記線状発熱材3の外周部に溝6が形成され、また同じ
く前記の一対の線状電極5,5から略同一距離にある一
方の、前記絶縁層4の外周部に溝6が形成されている。
この絶縁層4の外周部の溝6は外部から確認できるマー
キング7としての機能を果たす。なお、本実施例ではま
ず、金型を用いて成形により線状発熱材3の外周部に溝
6を成形し、次いでその上に均一な厚みの絶縁層4を被
覆して、絶縁層4の外周部の溝6を形成している。
FIG. 1 is a sectional view according to the first embodiment. As shown in FIG. 1, a PTC heater wire has a pair of linear electrodes 5 and 5 in which a metal conductor 2 is wound around an insulating core material 1 in a linear heating material 3 which is a PTC material. The linear heating elements 3 are embedded in parallel at regular intervals, the outer periphery of the linear heating material 3 is covered with an insulating layer 4, and the outer peripheral shape of the PTC heater wire cross section is formed into a substantially circular shape. . Then, one of the pair of linear electrodes 5 and 5 at substantially the same distance,
A groove 6 is formed in the outer peripheral portion of the linear heating material 3, and a groove 6 is formed in the outer peripheral portion of the insulating layer 4, which is also at substantially the same distance from the pair of linear electrodes 5 and 5. ing.
The groove 6 on the outer peripheral portion of the insulating layer 4 functions as a marking 7 that can be confirmed from the outside. In this embodiment, first, a groove 6 is formed on the outer peripheral portion of the linear heating material 3 by molding using a mold, and then the insulating layer 4 having a uniform thickness is coated on the groove 6 to form the insulating layer 4. A groove 6 on the outer peripheral portion is formed.

【0011】このように、本実施例では一対の線状電極
5,5から略同一距離にある一方の絶縁層4の外周部に
のみ溝6を形成し、この溝6がマーキング7の役割を果
たすようにしているが、図1のマーキング7と対面する
位置の絶縁層4の外周部に同様の溝を形成して、絶縁層
4の2か所にマーキング7が存在するようにしてもかま
わない。
As described above, in this embodiment, the groove 6 is formed only on the outer peripheral portion of the one insulating layer 4 which is located at substantially the same distance from the pair of linear electrodes 5 and 5, and the groove 6 serves as the marking 7. However, it is also possible to form a similar groove on the outer peripheral portion of the insulating layer 4 at a position facing the marking 7 in FIG. 1 so that the marking 7 exists at two positions on the insulating layer 4. Absent.

【0012】図2は第2実施例に係る断面図である。図
2に示すようにこの第2実施例では、一対の線状電極
5,5から略同一距離にある線状発熱材3の外周部には
溝が形成されずに、一対の線状電極5,5から略同一距
離にある一方の絶縁層4の外周部にのみ溝6が形成され
ている点が第1実施例と異なっているが、それ以外の構
成は前記の第1実施例と同一であり、絶縁層4の外周部
の溝6が外部から確認できるマーキング7としての機能
を果たしている。この第2実施例のように絶縁層4の外
周部にのみ溝6を形成するようにすると、線状発熱材3
の成形までの工程における金型が簡単な構造ものでよい
という利点がある。そして、絶縁層4の外周部の溝6を
形成する方法としては、例えば、線状発熱材3の上に均
一な厚みの絶縁層4を被覆した後、切削等の手段で実現
できる。
FIG. 2 is a sectional view according to the second embodiment. As shown in FIG. 2, in the second embodiment, no groove is formed on the outer peripheral portion of the linear heating material 3 which is located at substantially the same distance from the pair of linear electrodes 5 and 5, and the pair of linear electrodes 5 is formed. 5, 5 is different from the first embodiment in that a groove 6 is formed only in the outer peripheral portion of one insulating layer 4 which is at substantially the same distance from the first and second insulating layers 4, but the other configurations are the same as those in the first embodiment. Thus, the groove 6 on the outer peripheral portion of the insulating layer 4 functions as the marking 7 that can be confirmed from the outside. When the groove 6 is formed only on the outer peripheral portion of the insulating layer 4 as in the second embodiment, the linear heating material 3 is formed.
There is an advantage that a mold having a simple structure in the steps up to the molding can be used. A method of forming the groove 6 in the outer peripheral portion of the insulating layer 4 can be realized by, for example, cutting the linear heating material 3 after coating the insulating layer 4 with a uniform thickness.

【0013】図3は第3実施例に係る断面図である。図
3に示すようにこの第3実施例では一対の線状電極5,
5から略同一距離にある一方の絶縁層4の外周部に第2
実施例の溝の代わりに着色線8が形成されていて、それ
以外の構成は前記の第2実施例と同一であり、絶縁層4
の外周部の着色線8が外部から確認できるマーキング7
としての機能を果たしている。この第3実施例のように
絶縁層4の外周部のマーキング7を着色線8で形成する
ようにすると、前記の第2実施例と同様に、線状発熱材
3の成形までの工程における金型が簡単な構造ものでよ
いという利点がある。さらに、着色線8は二色成形や塗
布等の方法によれば、絶縁層4の外周の円形形状を維持
して着色線8を形成することが可能である。
FIG. 3 is a sectional view according to the third embodiment. As shown in FIG. 3, in this third embodiment, a pair of linear electrodes 5,
2 is formed on the outer peripheral portion of one insulating layer 4 that is approximately the same distance from
The colored line 8 is formed instead of the groove of the embodiment, and the other structure is the same as that of the second embodiment, and the insulating layer 4 is formed.
Marking 7 where the colored line 8 on the outer periphery of the
Fulfills the function as. When the marking 7 on the outer peripheral portion of the insulating layer 4 is formed by the colored line 8 as in the third embodiment, the gold in the steps up to the formation of the linear heating material 3 is performed as in the second embodiment. There is an advantage that the structure can be simple. Furthermore, the colored line 8 can be formed by maintaining the circular shape of the outer periphery of the insulating layer 4 by a method such as two-color molding or coating.

【0014】[0014]

【発明の効果】この発明に係るPTCヒータ線は、上述
のとおり構成されているので、次に記載する効果を奏す
る。
Since the PTC heater wire according to the present invention is constructed as described above, it has the following effects.

【0015】請求項1に係る発明によれば、略円形状の
PTCヒータ線を配線する場合に、内部に包埋されてい
る一対の線状電極の位置関係がその外観から確認できる
ようになり、従って荷重方向に対し各線状電極の中心位
置を結ぶ線が直交するような配線を行なうことが可能と
なる。その結果配線後のPTCヒータ線の短絡を防止で
きるようになる。
According to the first aspect of the present invention, when wiring a substantially circular PTC heater wire, the positional relationship between the pair of linear electrodes embedded inside can be confirmed from the appearance. Therefore, it is possible to perform wiring such that the line connecting the center positions of the linear electrodes is orthogonal to the load direction. As a result, short circuit of the PTC heater wire after wiring can be prevented.

【0016】請求項2に係る発明によれば、マーキング
が絶縁層に形成された溝であるので、消えにくい安定し
た表示機能を持つマーキングが得られる。
According to the second aspect of the invention, since the marking is a groove formed in the insulating layer, a marking having a stable display function that is hard to erase can be obtained.

【0017】請求項3に係る発明によれば、マーキング
の形成により絶縁層の外周形状が影響を受けることが少
なく、絶縁層の外周を円形形状に形成することが可能で
ある。
According to the third aspect of the invention, the outer peripheral shape of the insulating layer is less affected by the formation of the marking, and the outer peripheral surface of the insulating layer can be formed in a circular shape.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の第1実施例を示す断面図である。FIG. 1 is a sectional view showing a first embodiment of the present invention.

【図2】この発明の第2実施例を示す断面図である。FIG. 2 is a sectional view showing a second embodiment of the present invention.

【図3】この発明の第3実施例を示す断面図である。FIG. 3 is a sectional view showing a third embodiment of the present invention.

【図4】従来例を示す一部破断斜視図である。FIG. 4 is a partially cutaway perspective view showing a conventional example.

【図5】上記図4に示すPTCヒータ線の各線状電極と
荷重方向の関係を示す断面図であり、(a)、(b)は
それぞれ各線状電極の中心位置を結ぶ線と荷重方向が直
交する場合と一致する場合の位置関係を示している。
5 is a cross-sectional view showing a relationship between each linear electrode and the loading direction of the PTC heater wire shown in FIG. 4, wherein (a) and (b) respectively show a line connecting the center positions of the linear electrodes and a loading direction. The positional relationship in the case where they are orthogonal to each other is shown.

【符号の説明】[Explanation of symbols]

1 絶縁性芯材 2 金属導体 3 線状発熱材 4 絶縁層 5 線状電極 6 溝 7 マーキング 8 着色線 1 Insulating Core Material 2 Metal Conductor 3 Linear Heating Material 4 Insulating Layer 5 Linear Electrode 6 Groove 7 Marking 8 Colored Wire

───────────────────────────────────────────────────── フロントページの続き (72)発明者 森田 裕子 大阪府門真市大字門真1048番地松下電工株 式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuko Morita 1048, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 抵抗−温度係数が正の線状発熱材(3)
内に、その軸方向に沿って、一対の線状電極(5,5)
が互いの間に一定間隔をおいて平行に配置され包埋され
ていて、かつ、線状発熱材(3)の外周が絶縁層(4)
で被覆されている、断面が略円形状のPTCヒータ線に
おいて、前記の一対の線状電極(5,5)から略同一距
離にある少なくとも一方の、前記絶縁層(4)の外周部
にマーキング(7)が施されていることを特徴とするP
TCヒータ線。
1. A linear heating material having a positive resistance-temperature coefficient (3)
A pair of linear electrodes (5, 5) along the axial direction
Are embedded in parallel with each other with a constant space therebetween, and the outer periphery of the linear heating material (3) is an insulating layer (4).
In a PTC heater wire having a substantially circular cross section, which is covered with, marking on at least one outer peripheral portion of the insulating layer (4) at substantially the same distance from the pair of linear electrodes (5, 5). P characterized by being subjected to (7)
TC heater wire.
【請求項2】 マーキング(7)が絶縁層(4)に形成
された溝(6)であることを特徴とする請求項1記載の
PTCヒータ線。
2. A PTC heater wire according to claim 1, characterized in that the marking (7) is a groove (6) formed in the insulating layer (4).
【請求項3】 マーキング(7)が絶縁層(4)に形成
された着色線(8)であることを特徴とする請求項1記
載のPTCヒータ線。
3. PTC heater wire according to claim 1, characterized in that the marking (7) is a colored wire (8) formed on the insulating layer (4).
JP29358993A 1993-11-24 1993-11-24 Ptc heater wire Withdrawn JPH07147186A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29358993A JPH07147186A (en) 1993-11-24 1993-11-24 Ptc heater wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29358993A JPH07147186A (en) 1993-11-24 1993-11-24 Ptc heater wire

Publications (1)

Publication Number Publication Date
JPH07147186A true JPH07147186A (en) 1995-06-06

Family

ID=17796683

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29358993A Withdrawn JPH07147186A (en) 1993-11-24 1993-11-24 Ptc heater wire

Country Status (1)

Country Link
JP (1) JPH07147186A (en)

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20010130