JP2000021604A - Current limiter device - Google Patents
Current limiter deviceInfo
- Publication number
- JP2000021604A JP2000021604A JP10184503A JP18450398A JP2000021604A JP 2000021604 A JP2000021604 A JP 2000021604A JP 10184503 A JP10184503 A JP 10184503A JP 18450398 A JP18450398 A JP 18450398A JP 2000021604 A JP2000021604 A JP 2000021604A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- ptc
- insulating frame
- frame
- polymer plate
- 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.)
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- Thermistors And Varistors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば過電流保護
回路に用いられ、短絡電流又は大電流（以下、両電流を
総称して短絡電流という）の限流を行う限流素子に関
し、特にその電極間の絶縁破壊を防止する絶縁枠に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a current limiting element for use in, for example, an overcurrent protection circuit for limiting a short-circuit current or a large current (hereinafter, both currents are collectively referred to as a short-circuit current). The present invention relates to an insulating frame for preventing dielectric breakdown between electrodes.
【０００２】[0002]
【従来の技術】図９は、例えば特開平４−２６６００１
号公報に示された従来の限流素子を示す側断面図であ
る。図中の符号１はＰＴＣ特性を有するＰＴＣ素子板と
してのＰＴＣポリマー板である。このＰＴＣポリマー板
１は、ポリマー材料とポリマー材料中に分散させた導電
性の粉末材料とを含んだ正の抵抗温度係数を持つ導電性
のポリマーコンパウンドで形成されており、２つの平行
な主平面１ａ、１ｂを有する板状に形成されている。符
号２及び３はＰＴＣポリマー板１に電流を流すために、
ＰＴＣポリマー板１の２つの平行な主平面１ａと主平面
１ｂとに接触するように配設された電極である。符号４
及び５は絶縁部材であり、例えばガラス繊維によって強
化された樹脂で形成され、ＰＴＣポリマー板１を中央に
して挟持する２つの電極２、３を更に加圧して挟持す
る。尚、符号６は絶縁部材４、５の端部に形成された貫
通孔４ａ、５ａに挿入されたボルト、７は止めナット、
８は弾性部材としてのバネであり、絶縁部材４、５を締
め付けることにより、ＰＴＣポリマー板１の主平面１
ａ、１ｂと電極２、３との接触面に対して垂直方向の圧
力を加えて、ＰＴＣポリマー板１と２つの電極２、３と
の接触抵抗を低減させるように構成されている。符号９
は絶縁枠である。絶縁枠９は、ＰＴＣポリマー板１の外
縁周面に取り付けられ、後述の導電性ガスによる電極
２、３間の絶縁破壊を防止するためのものである。2. Description of the Related Art FIG.
FIG. 1 is a side sectional view showing a conventional current limiting element disclosed in Japanese Patent Application Laid-Open Publication No. HEI 10-115,000. Reference numeral 1 in the drawing denotes a PTC polymer plate as a PTC element plate having PTC characteristics. The PTC polymer plate 1 is formed of a conductive polymer compound having a positive temperature coefficient of resistance containing a polymer material and a conductive powder material dispersed in the polymer material. It is formed in a plate shape having 1a and 1b. Symbols 2 and 3 are used to pass a current through the PTC polymer plate 1,
The electrodes are provided so as to be in contact with two parallel main planes 1a and 1b of the PTC polymer plate 1. Code 4
And 5 are insulating members formed of, for example, a resin reinforced by glass fiber, and pressurize and hold two electrodes 2 and 3 sandwiching the PTC polymer plate 1 at the center. Reference numeral 6 denotes a bolt inserted into through holes 4a, 5a formed at the ends of the insulating members 4, 5, reference numeral 6 denotes a lock nut,
Reference numeral 8 denotes a spring as an elastic member, which tightens the insulating members 4 and 5 to form a main plane 1 of the PTC polymer plate 1.
The contact resistance between the PTC polymer plate 1 and the two electrodes 2 and 3 is reduced by applying a pressure in the vertical direction to the contact surfaces between the electrodes a and 1b and the electrodes 2 and 3. Code 9
Is an insulating frame. The insulating frame 9 is attached to the outer peripheral surface of the PTC polymer plate 1 to prevent dielectric breakdown between the electrodes 2 and 3 due to a conductive gas described later.
【０００３】このような限流素子は、例えば過電流保護
回路等に用いられる。ＰＴＣポリマー板１の抵抗値は、
ＰＴＣポリマー板１の動作温度１３５℃以下においては
例えば数ｍΩである。過電流保護回路に短絡電流が流れ
ると、ＰＴＣポリマー板１と電極２、３とのそれぞれの
接触面に電磁反発力が発生し、それによってＰＴＣポリ
マー板１と電極２、３との接触点が減少する。これは、
残っている接触点への短絡電流の集中につながり、ジュ
ール熱が発生し、このジュール熱によって接触点でのＰ
ＴＣポリマー板１の温度を上昇させる。この温度がＰＴ
Ｃポリマー板１の動作温度を越えると、ＰＴＣポリマー
板１は低抵抗状態から高抵抗状態に変化し、その抵抗値
は例えば数Ωになる。そして、この抵抗値の増加によっ
て短絡電流は限流される。[0003] Such a current limiting element is used, for example, in an overcurrent protection circuit or the like. The resistance value of the PTC polymer plate 1 is
When the operating temperature of the PTC polymer plate 1 is 135 ° C. or lower, the resistance is, for example, several mΩ. When a short-circuit current flows through the overcurrent protection circuit, an electromagnetic repulsive force is generated on the respective contact surfaces between the PTC polymer plate 1 and the electrodes 2 and 3, and thereby the contact points between the PTC polymer plate 1 and the electrodes 2 and 3 are changed. Decrease. this is,
The short circuit current is concentrated on the remaining contact points, and Joule heat is generated.
The temperature of the TC polymer plate 1 is increased. This temperature is PT
When the operating temperature of the C polymer plate 1 is exceeded, the PTC polymer plate 1 changes from a low resistance state to a high resistance state, and its resistance value becomes, for example, several Ω. The increase in the resistance value limits the short-circuit current.
【０００４】上記のような限流素子では、ＰＴＣポリマ
ー板１に短絡電流が流れたときに、ＰＴＣポリマー板１
と電極２、３との接触点の更に微小領域においては、Ｐ
ＴＣポリマー板１の動作温度をはるかに超えてポリマー
材料の気化温度を超え、アークが発生し、このアークに
よって加熱された多量のガスが発生する。このガスは高
温度であるため電子やイオンを含み、導電性を有してい
る。ＰＴＣポリマー板１の主平面１ａ、１ｂの端面周辺
から放出された上記の高温導電性ガスは、ＰＴＣポリマ
ー板１の縁周辺部にて、電極２と電極３との間の絶縁破
壊を防止するため、絶縁枠９を設けることが必要とな
る。In the current limiting element as described above, when a short-circuit current flows through the PTC polymer plate 1, the PTC polymer plate 1
In a further minute area of the contact point between the electrodes and the electrodes 2 and 3, P
The temperature exceeds the operating temperature of the TC polymer plate 1 and exceeds the vaporization temperature of the polymer material, and an arc is generated, which generates a large amount of heated gas. Since this gas has a high temperature, it contains electrons and ions and has conductivity. The high-temperature conductive gas released from the periphery of the principal planes 1a and 1b of the PTC polymer plate 1 prevents dielectric breakdown between the electrode 2 and the electrode 3 around the edge of the PTC polymer plate 1. Therefore, it is necessary to provide the insulating frame 9.
【０００５】絶縁枠９を設けるには、一般に、次のよう
に行われる。先ず、ＰＴＣポリマー板１の形状を有する
金型にてＰＴＣポリマー板１を成形し、その後、ＰＴＣ
ポリマー板１と絶縁枠９の形状を有する金型に、ＰＴＣ
ポリマー板１を挿入して、空間となる絶縁枠９の部分に
絶縁性樹脂を注入して成形する。[0005] The provision of the insulating frame 9 is generally performed as follows. First, the PTC polymer plate 1 is molded using a mold having the shape of the PTC polymer plate 1, and then the PTC polymer plate 1 is molded.
PTC is added to a mold having the shape of the polymer plate 1 and the insulating frame 9.
The polymer plate 1 is inserted, and an insulating resin is injected into a portion of the insulating frame 9 serving as a space to be molded.
【０００６】[0006]
【発明が解決しようとする課題】上記のような従来のＰ
ＴＣポリマー板１による限流素子では、絶縁枠９の形成
時に熱的ストレスが加わり、常温に冷却されたとき絶縁
枠９が縮み限流素子が反ったり、割れたりして、電極２
と電極３との間で絶縁破壊しやすいという問題があっ
た。又、絶縁枠９は、別途成形されて、ＰＴＣポリマー
板１の外縁周面に密着されていたため、大きな短絡電流
を限流すると、熱膨張によりＰＴＣポリマー板１が大き
く伸びて、絶縁枠９が押されて変形し、ＰＴＣポリマー
板１との間に大きな隙間が生じたり、ＰＴＣポリマー板
１にストレスが加わって割れたりして、電極２と電極３
との間で絶縁破壊するという問題があった。The conventional P as described above
In the current limiting element using the TC polymer plate 1, thermal stress is applied when the insulating frame 9 is formed, and when cooled to room temperature, the insulating frame 9 shrinks, and the current limiting element warps or cracks.
There is a problem that dielectric breakdown easily occurs between the electrode 3 and the electrode 3. Further, since the insulating frame 9 is separately formed and is closely adhered to the outer peripheral surface of the PTC polymer plate 1, when a large short-circuit current is limited, the PTC polymer plate 1 greatly expands due to thermal expansion and the insulating frame 9 The PTC polymer plate 1 is deformed by being pressed, and a large gap is formed between the PTC polymer plate 1 and the PTC polymer plate 1.
There is a problem that dielectric breakdown occurs between these two.
【０００７】本発明は、上述のような課題を解決し、大
きな短絡電流が流れても絶縁破壊が生じ難く、耐久性の
高い限流素子の提供を目的とする。An object of the present invention is to solve the problems described above and to provide a current-limiting element having high durability, which is unlikely to cause dielectric breakdown even when a large short-circuit current flows.
【０００８】[0008]
【課題を解決するための手段】請求項１の発明は、ＰＴ
Ｃ素子板と、当該ＰＴＣ素子板の外縁周面を囲んでＰＴ
Ｃ素子板を保持する絶縁枠とを備えた限流素子におい
て、前記絶縁枠はＰＴＣ素子板との間に隙間を設けて当
該ＰＴＣ素子板を保持させたことを特徴とする。According to the first aspect of the present invention, a PT
C element plate and a PT element surrounding the outer peripheral surface of the PTC element plate.
In a current limiting device having an insulating frame for holding a C element plate, a gap is provided between the insulating frame and the PTC element plate to hold the PTC element plate.
【０００９】請求項２の発明は、ＰＴＣ素子板と、当該
ＰＴＣ素子板の外縁周面を包むように内周面が断面コ字
状に形成された絶縁枠とを備えた限流素子において、Ｐ
ＴＣ素子板と前記絶縁枠の内周面との間に間隙を設けた
構成したことを特徴とする。According to a second aspect of the present invention, there is provided a current limiting element having a PTC element plate and an insulating frame having an inner peripheral surface formed in a U-shape in cross section so as to surround the outer peripheral surface of the PTC element plate.
A gap is provided between the TC element plate and the inner peripheral surface of the insulating frame.
【００１０】請求項３の発明は、請求項２に記載の限流
素子において、間隙はＰＴＣ素子板を支承するよう絶縁
枠に形成された複数の支承部により断面コ字状に形成さ
れたことを特徴とする。According to a third aspect of the present invention, in the current limiting element according to the second aspect, the gap is formed in a U-shaped cross section by a plurality of support portions formed on the insulating frame to support the PTC element plate. It is characterized by.
【００１１】請求項４の発明は、請求項２又は請求項３
に記載の限流素子において、間隙の幅は最大でＰＴＣ素
子板の板厚の１／２であることを特徴とする。[0011] The invention of claim 4 is the invention of claim 2 or claim 3.
Wherein the width of the gap is at most half the thickness of the PTC element plate.
【００１２】請求項５の発明は、請求項２又は請求項３
に記載の限流素子において、ＰＴＣ素子板の外縁周面を
包むように配置された内周面が断面コ字状の絶縁枠は、
内周面が断面Ｌ字状に形成された一対の枠構成部材を向
かい合わせに合致させた構成としたことを特徴とする。[0012] The invention of claim 5 is the invention of claim 2 or claim 3.
In the current limiting element described in the above, the inner peripheral surface arranged to wrap the outer peripheral surface of the PTC element plate is an insulating frame having a U-shaped cross section,
It is characterized in that a pair of frame components whose inner peripheral surfaces are formed in an L-shaped cross section face each other.
【００１３】請求項６の発明は、請求項２又は請求項３
に記載の限流素子において、ＰＴＣ素子板の外縁周面を
包むように配置された内周面が断面コ字状の絶縁枠は、
内周面が断面Ｌ字状に形成された一対の枠構成部材の一
辺側を屈曲自在に連結し、当該屈曲軸を中心にして向か
い合わせに閉じあわせた構成としたことを特徴とする。[0013] The invention of claim 6 is the invention of claim 2 or claim 3.
In the current limiting element described in the above, the inner peripheral surface arranged to wrap the outer peripheral surface of the PTC element plate is an insulating frame having a U-shaped cross section,
It is characterized in that one side of a pair of frame components whose inner peripheral surfaces are formed in an L-shaped cross section is flexibly connected to each other, and is closed face-to-face around the bending axis.
【００１４】請求項７の発明は、請求項２又は請求項３
に記載の限流素子において、ＰＴＣ素子板の外縁周面を
包むように配置された内周面が断面コ字状の絶縁枠は、
ＰＴＣ素子板を当該絶縁枠の一辺に形成された差入口か
ら差し込んだ後、差入口が絶縁素材で封鎖された構成と
したことを特徴とする。According to a seventh aspect of the present invention, there is provided the second or third aspect.
In the current limiting element described in the above, the inner peripheral surface arranged to wrap the outer peripheral surface of the PTC element plate is an insulating frame having a U-shaped cross section,
After the PTC element plate is inserted from the entrance formed on one side of the insulating frame, the entrance is closed with an insulating material.
【００１５】請求項８の発明は、請求項１乃至７の何れ
かに記載の限流素子において、ＰＴＣ素子板はＰＴＣ特
性を有するＰＴＣポリマー板であることを特徴とする。According to an eighth aspect of the present invention, in the current limiting element according to any one of the first to seventh aspects, the PTC element plate is a PTC polymer plate having PTC characteristics.
【００１６】[0016]
【発明の実施の形態】実施の形態１．この実施の形態１
は、ＰＴＣ素子板と絶縁枠との間に隙間を設けて当該Ｐ
ＴＣ素子板を絶縁枠に保持させた構成としたもので、絶
縁枠は、内周面が断面Ｌ字状で枠状に形成された一対の
枠構成部材を向かい合わせに合致させることで、内周面
が断面コ字状に構成され、当該断面コ字状の内周面がＰ
ＴＣ素子板の外縁周面を包むように形成したものであ
る。図１は限流素子の要部を示す側断面図であり、図２
は分解斜視図、図３は一部断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Embodiment 1
Provides a gap between the PTC element plate and the insulating frame to
The TC element plate is held by an insulating frame. The insulating frame has an inner peripheral surface formed by facing a pair of frame components formed in a frame shape with an L-shaped cross section facing each other. The peripheral surface has a U-shaped cross section, and the inner peripheral surface of the U-shaped cross section is P
It is formed so as to surround the outer peripheral surface of the TC element plate. FIG. 1 is a side sectional view showing a main part of the current limiting element, and FIG.
Is an exploded perspective view, and FIG. 3 is a partial sectional view.
【００１７】図１乃至図３において、図中の符号１は、
ＰＴＣ素子板としてのＰＴＣポリマー板で、ポリマー材
料とポリマー材料中に分散させた導電性の粉末材料とを
含んだ正の抵抗温度係数を持つ導電性のポリマーコンパ
ウンドから形成されており、主平面１ａと主平面１ｂと
の２つの主平面を有する板状に形成されている。符号２
及び３はＰＴＣポリマー板１に電流を流すために、ＰＴ
Ｃポリマー板１の２つの主平面１ａ、１ｂとにそれぞれ
両側から接触するように配設された電極である。In FIGS. 1 to 3, reference numeral 1 in the drawings denotes
A PTC polymer plate as a PTC element plate, which is formed of a conductive polymer compound having a positive temperature coefficient of resistance containing a polymer material and a conductive powder material dispersed in the polymer material; And a main plane 1b. Sign 2
And 3 are PTs for passing a current through the PTC polymer plate 1.
The electrodes are disposed so as to contact the two main planes 1a and 1b of the C polymer plate 1 from both sides.
【００１８】符号４及び５は、更に電極２、３のそれぞ
れの背後から電極２、３及びＰＴＣポリマー板１を挟圧
する絶縁部材であり、例えばガラス繊維によって強化さ
れた樹脂で形成され、ＰＴＣポリマー板１及び２つの電
極２、３を加圧して挟持している。符号６は絶縁部材
４、５の端部に形成された貫通孔４ａ、５ａに挿入され
たボルト、７は止めナット、８は弾性部材としてのバネ
で、２つの絶縁部材４、５を締め付けることにより、Ｐ
ＴＣポリマー板１の主平面１ａ、１ｂと電極２、３との
接触面に対して垂直方向の圧力を加えて、ＰＴＣポリマ
ー板１と２つの電極２、３との接触抵抗を低減させるよ
うに構成されている。Reference numerals 4 and 5 denote insulating members for pressing the electrodes 2 and 3 and the PTC polymer plate 1 from behind each of the electrodes 2 and 3, and are formed of, for example, a resin reinforced by glass fiber, and The plate 1 and the two electrodes 2, 3 are pressed and sandwiched. Reference numeral 6 denotes a bolt inserted into through holes 4a and 5a formed at the ends of the insulating members 4 and 5, reference numeral 7 denotes a lock nut, and reference numeral 8 denotes a spring as an elastic member, which tightens the two insulating members 4 and 5. By P
By applying a pressure in the vertical direction to the contact surface between the principal planes 1a and 1b of the TC polymer plate 1 and the electrodes 2 and 3, the contact resistance between the PTC polymer plate 1 and the two electrodes 2 and 3 is reduced. It is configured.
【００１９】さて、符号１４は絶縁枠であり、ＰＴＣポ
リマー板１の外縁周面に、当該ＰＴＣポリマー板１の２
つの主平面１ａ、１ｂに向かう方向から当該ＰＴＣポリ
マー板１を嵌め込むように２分割された枠状の枠構成部
材１４ｘ、１４ｙを一対として構成されている。この例
では内周面が断面Ｌ字状に形成された同一形状の２個の
枠構成部材１４ｘ、１４ｙを向かい合わせに合体、即ち
組み合わせることで断面コ字状の内周面を持つ絶縁枠１
４を構成している。絶縁枠１４を構成する２つの枠構成
部材１４ｘ、１４ｙは、それぞれ、ＰＴＣポリマー板１
の四つの端面を巡る外縁周面に沿う内枠１４ａと、ＰＴ
Ｃポリマー板１の主平面１ａ、１ｂの一方の平面を縁取
るように四辺を巡り覆う外枠１４ｂとを有する断面Ｌ型
をなし、同一形状のこの２つの枠構成部材１４ｘ、１４
ｙを向かい合わせ合体させることで、断面がコ字状の内
周面が形成されている。図中の符号１４ｃは係止突起、
１４ｄは係止穴であり一対の枠構成部材１４ｘ、１４ｙ
の合体、即ち組み合わせを維持する。尚、一対の枠構成
部材１４ｘと１４ｙとの合体面は、ＰＴＣポリマー板１
の厚さ内に位置することになって、ＰＴＣポリマー板１
の主平面１ａ、１ｂからは直接見通せないため、ＰＴＣ
ポリマー板１の作動時に発生するガスがこの合体面の面
と面との間隙を通過することはほとんど無く、通過によ
る絶縁枠１４の破損の虞はない。Reference numeral 14 denotes an insulating frame which is provided on the outer peripheral surface of the PTC polymer
A pair of frame-shaped frame components 14x, 14y divided into two so as to fit the PTC polymer plate 1 from the direction toward the two main planes 1a, 1b. In this example, an insulating frame 1 having an inner peripheral surface having a U-shaped cross section is formed by combining two frame forming members 14x and 14y having the same shape whose inner peripheral surfaces are formed in an L-shaped cross section, facing each other.
4. The two frame components 14x and 14y that constitute the insulating frame 14 are each a PTC polymer plate 1
Inner frame 14a along the outer peripheral surface around the four end surfaces of the
An outer frame 14b covering four sides so as to border one of the main planes 1a and 1b of the C polymer plate 1 forms an L-shaped cross section, and these two frame constituting members 14x and 14 having the same shape.
The inner peripheral surface having a U-shape in cross section is formed by joining y face to face. Reference numeral 14c in FIG.
14d is a locking hole, which is a pair of frame members 14x and 14y.
, Ie, the combination is maintained. The united surface of the pair of frame components 14x and 14y is the PTC polymer plate 1
Of the PTC polymer plate 1
PTCs cannot be seen directly from the main planes 1a and 1b of
The gas generated during the operation of the polymer plate 1 hardly passes through the gap between the combined surfaces, and there is no fear that the insulating frame 14 is damaged by the passage.
【００２０】合体された２つの内枠１４ａ、１４ａを合
わせた枠溝幅、即ちコ字状の内部空間における縦方向の
幅は、ＰＴＣポリマー板１の板厚より大きくなるよう予
め設定している。この例では、枠溝幅≦ＰＴＣポリマー
板の板厚＋ＰＴＣポリマー板の板厚×１／２としてい
る。又、内枠１４ａの縦方向の差渡し長さについては、 縦差渡長≦ＰＴＣポリマー板の縦の差渡し長さ＋ＰＴＣ
ポリマー板の板厚×１／２ 内枠１４ａの横の差渡し長さについても、同様に、 横差渡長≦ＰＴＣポリマー板の横の差渡し長さ＋ＰＴＣ
ポリマー板の板厚×１／２ としている。The groove width of the combined inner frames 14a, 14a, that is, the width in the vertical direction in the U-shaped internal space is set in advance to be larger than the thickness of the PTC polymer plate 1. . In this example, the width of the frame groove ≦ the thickness of the PTC polymer plate + the thickness of the PTC polymer plate × １ ／. The length of the inner frame 14a in the vertical direction is as follows: vertical length ≦ the vertical length of the PTC polymer plate + PTC.
Similarly, the transverse width of the inner frame 14a is calculated as follows: transverse width ≦ transverse transverse length of the PTC polymer plate + PTC.
The thickness of the polymer plate is 1/2.
【００２１】次に、図１において、上記の絶縁枠１４が
ＰＴＣポリマー板１を保持している状態における絶縁枠
１４とＰＴＣポリマー板１との間隙について説明する。
図中の符号ＡはＰＴＣポリマー板１の厚さ、ＣはＰＴＣ
ポリマー板１の長さ、Ｂは絶縁枠１４の開口部高さ即ち
上記の枠溝幅、Ｄは絶縁枠１４の内枠１４ａの内側の長
さ即ち縦又は横の差渡し長さで、Ｂ−Ａ≦Ａ／２、Ｄ−
Ｃ≦Ａ／２の関係となっている。このため、絶縁枠１４
でＰＴＣポリマー板１を保持したとき、ＰＴＣポリマー
板１にはストレスがかからない状態となる。Next, referring to FIG. 1, the gap between the insulating frame 14 and the PTC polymer plate 1 in a state where the insulating frame 14 holds the PTC polymer plate 1 will be described.
The symbol A in the figure is the thickness of the PTC polymer plate 1, and C is the PTC
The length of the polymer plate 1, B is the height of the opening of the insulating frame 14, that is, the width of the above-mentioned frame groove, and D is the length inside the inner frame 14 a of the insulating frame 14, that is, the vertical or horizontal span length, B −A ≦ A / 2, D−
C ≦ A / 2. For this reason, the insulating frame 14
When the PTC polymer plate 1 is held in the state described above, no stress is applied to the PTC polymer plate 1.
【００２２】ＰＴＣポリマー板１の厚みを１ｍｍとし、
ＰＴＣポリマー板１と断面コ字状の絶縁枠１４の内周面
との間隙を、０．１ｍｍ、０．２ｍｍ、０．４ｍｍ、
０．６ｍｍ、０．８ｍｍとする試料を製作して限流試験
を行った。その結果、０．１ｍｍ、０．２ｍｍ、０．４
ｍｍの隙間では、３回の限流動作に成功した。０．６ｍ
ｍと０．８ｍｍの間隙では、１回目で絶縁破壊した。こ
の限流試験結果より、ＰＴＣポリマー板１と断面コ字状
の絶縁枠の内周面との間隙は、ＰＴＣポリマー板１の１
／２の厚さが好ましいことが示された。従って、２つの
電極２、３間の絶縁破壊を防止できる絶縁枠１４をＰＴ
Ｃポリマー板１にストレスを与えないでこれを保持する
ことができた。The thickness of the PTC polymer plate 1 is 1 mm,
The gap between the PTC polymer plate 1 and the inner peripheral surface of the insulating frame 14 having a U-shaped cross section is 0.1 mm, 0.2 mm, 0.4 mm,
Samples of 0.6 mm and 0.8 mm were produced and subjected to a current limiting test. As a result, 0.1 mm, 0.2 mm, 0.4
In the gap of mm, three current limiting operations were successful. 0.6m
In the gap between m and 0.8 mm, the first dielectric breakdown occurred. From the results of the current limiting test, the gap between the PTC polymer plate 1 and the inner peripheral surface of the insulating frame having a U-shaped cross section is 1
A thickness of / 2 has been shown to be preferred. Therefore, the insulating frame 14 that can prevent dielectric breakdown between the two electrodes 2 and 3 is made of PT
This could be maintained without giving stress to the C polymer plate 1.
【００２３】上記したＰＴＣ素子板１と絶縁枠１４の内
周面との間隙は、図において上下左右とも均等な間隔、
即ちコ字状の間隔を維持した状態で保持されているが、
これは、図４乃至図６に示すように、絶縁枠１４の内周
面側に、ＰＴＣ素子板１を支承するように形成された複
数の支承部１４ｚを適当に配設しているからである。し
かし、本発明では、必ずしも、このように、ＰＴＣ素子
板１と絶縁枠１４の内周面との間隙を均等な間隔にて、
恰も、ＰＴＣ素子板１を空中に浮かせる形に保持する必
要はない。従って、上記のような支承部１４ｚは必須の
構成要素ではない。即ち、上記で説明した間隔が形成さ
れる条件を与えた絶縁枠１４にＰＴＣ素子板１を単に保
持させておくだけでよいのである。この場合、ＰＴＣ素
子板１は絶縁枠１４に保持された状態にて多少ガタツキ
を生ずるが、機能上何らの支障はなく、上記した作用効
果を発揮できる。The gap between the above-mentioned PTC element plate 1 and the inner peripheral surface of the insulating frame 14 is the same at the top, bottom, left and right in FIG.
In other words, it is held with the U-shaped interval maintained,
This is because a plurality of support portions 14z formed to support the PTC element plate 1 are appropriately arranged on the inner peripheral surface side of the insulating frame 14, as shown in FIGS. is there. However, in the present invention, the gap between the PTC element plate 1 and the inner peripheral surface of the insulating frame 14 is not necessarily equal, as described above.
It is not necessary to hold the PTC element plate 1 in a form floating in the air. Therefore, the support portion 14z as described above is not an essential component. That is, it is only necessary to simply hold the PTC element plate 1 on the insulating frame 14 provided with the conditions for forming the above-described interval. In this case, the PTC element plate 1 slightly rattles while being held by the insulating frame 14, but there is no problem in function and the above-mentioned effects can be exhibited.
【００２４】実施の形態２．実施の形態２は、内周面が
断面コ字状の絶縁枠は、内周面が断面Ｌ字状に形成され
た一対の枠構成部材の一辺側を屈曲自在に連結し、この
屈曲軸を中心にして向かい合わせに閉じ合せて構成した
ものである。図７はこの絶縁枠１５の斜視図である。図
中の符号１はＰＴＣ素子板としてのＰＴＣポリマー板で
ある。この絶縁枠１５は、ＰＴＣポリマー板１を挟む一
対の枠構成部材１５ｘと１５ｙとの２面がその一辺にお
いて連結され屈曲自在に一体形成されて、その屈曲軸１
５ｆを中心に開閉する。図中の符号１５ａはＰＴＣポリ
マー板１の外縁周に沿う内枠、１５ｂは、ＰＴＣポリマ
ー板１としてのサーミスタ素子を挟む外枠である。Embodiment 2 FIG. In the second embodiment, an insulating frame having an inner peripheral surface having a U-shaped cross section is configured such that one side of a pair of frame forming members having inner peripheral surfaces formed into an L-shaped cross section is flexibly connected to each other, and this bending axis is connected. It is configured to be face-to-face and closed at the center. FIG. 7 is a perspective view of the insulating frame 15. Reference numeral 1 in the drawing denotes a PTC polymer plate as a PTC element plate. The insulating frame 15 has a pair of frame forming members 15x and 15y sandwiching the PTC polymer plate 1 connected at one side thereof, and is integrally formed so as to be freely bendable.
Open and close around 5f. Reference numeral 15a in the figure denotes an inner frame along the outer periphery of the PTC polymer plate 1, and 15b denotes an outer frame which sandwiches the thermistor element as the PTC polymer plate 1.
【００２５】２つの内枠１５ａが合わされたときの枠溝
幅は、上記実施の形態１と同様にＰＴＣポリマー板１の
厚さにＰＴＣポリマー板１の１／２以下の厚さを加えた
寸法となっている。又、内枠１５ａの縦及び横の差渡し
長さも、ＰＴＣポリマー板１の長さより、ＰＴＣポリマ
ー板１の厚みの１／２以下ほど長くなっている。上記の
屈曲自在な屈曲軸１５ｆと絶縁枠１５の外周側の形態を
除き、この実施の形態２は実質的に上記実施の形態１と
基本的に同様である。従って、この形態においても、実
施の形態１に示した図１と同様にＢ−Ａ≦Ａ／２、Ｄ−
Ｃ≦Ａ／２の関係にある。The width of the frame groove when the two inner frames 15a are combined is the dimension obtained by adding the thickness of the PTC polymer plate 1 to the thickness of the PTC polymer plate 1 or less, as in the first embodiment. It has become. The length of the inner frame 15a in the vertical and horizontal directions is longer than the length of the PTC polymer plate 1 by about の or less of the thickness of the PTC polymer plate 1. The second embodiment is basically the same as the first embodiment, except for the form of the bendable shaft 15f and the outer peripheral side of the insulating frame 15. Accordingly, also in this embodiment, BA ≦ A / 2, D−
C ≦ A / 2.
【００２６】この実施の形態２では、ＰＴＣポリマー板
１を挿入して屈曲部１５ｆを折り曲げることにより、Ｐ
ＴＣポリマー板１の外縁周に絶縁枠１５を取り付けるこ
とができる。そして、図に示す係止突起１５ｃと係止穴
１５ｄとで、一対の枠構成部材１５ｘと１５ｙとの合体
状態が維持される。In the second embodiment, by inserting the PTC polymer plate 1 and bending the bent portion 15f,
An insulating frame 15 can be attached to the outer periphery of the TC polymer plate 1. Then, the engagement state of the pair of frame components 15x and 15y is maintained by the engagement protrusion 15c and the engagement hole 15d shown in the drawing.
【００２７】実施の形態２において、ＰＴＣポリマー板
１の厚みを１ｍｍとし、ＰＴＣポリマー板１と内周面の
断面がコ字状の絶縁枠１５との隙間を、０．１ｍｍ、
０．２ｍｍ、０．４ｍｍ、０．６ｍｍ、０．８ｍｍとす
る試料を製作し限流試験を行った。その結果、０．１ｍ
ｍ、０．２ｍｍ、０．４ｍｍの隙間では、３回の限流動
作に成功した。０．６ｍｍと０．８ｍｍの隙間では１回
目で絶縁破壊した。この限流試結果より、ＰＴＣポリマ
ー板１と絶縁枠１５との間隙は、ＰＴＣポリマー板１の
１／２の厚さが好ましいことが示された。従って、この
実施の形態２においても、２つの電極２、３間の絶縁破
壊を防止できる絶縁枠１５をＰＴＣポリマー板１にスト
レスを与えないで設けることができた。In the second embodiment, the thickness of the PTC polymer plate 1 is 1 mm, and the gap between the PTC polymer plate 1 and the insulating frame 15 whose inner peripheral surface has a U-shape is 0.1 mm.
Samples of 0.2 mm, 0.4 mm, 0.6 mm, and 0.8 mm were manufactured and subjected to a current limiting test. As a result, 0.1m
In the gaps of m, 0.2 mm, and 0.4 mm, the current limiting operation was successfully performed three times. In the gap between 0.6 mm and 0.8 mm, the first dielectric breakdown occurred. The results of the current limiting test show that the gap between the PTC polymer plate 1 and the insulating frame 15 is preferably half the thickness of the PTC polymer plate 1. Therefore, also in the second embodiment, the insulating frame 15 that can prevent dielectric breakdown between the two electrodes 2 and 3 can be provided without applying stress to the PTC polymer plate 1.
【００２８】実施の形態３．実施の形態３は、内周面が
断面コ字状の絶縁枠を、ＰＴＣ素子板を当該絶縁枠の一
辺に形成された差入口から差し込んだ後、差入口を絶縁
素材（図示せず）で封鎖した構成としたものである。図
８はこの絶縁枠１６を示す。図中の符号１６ａはＰＴＣ
ポリマー板１を挿入する差込口である。絶縁枠１６の１
辺にＰＴＣポリマー板１を挿入する開口部１６Ｃが設け
られている。この開口部１６ｃは、ＰＴＣポリマー板１
を挿入後、適当な絶縁部材で閉じられる。Embodiment 3 In the third embodiment, after inserting an insulating frame whose inner peripheral surface has a U-shaped cross section, a PTC element plate is inserted from a port formed on one side of the insulating frame, the port is made of an insulating material (not shown). This is a closed configuration. FIG. 8 shows the insulating frame 16. The symbol 16a in the figure is PTC
This is an insertion port into which the polymer plate 1 is inserted. 1 of insulating frame 16
An opening 16C for inserting the PTC polymer plate 1 is provided on the side. The opening 16c is provided in the PTC polymer plate 1
After insertion, it is closed with a suitable insulating member.
【００２９】この実施の形態３も、上記実施の形態１と
同様に、ＰＴＣポリマー板１と内周面の断面がコ字状の
絶縁枠１６との間隙は、ＰＴＣポリマー板１の１／２以
下の厚さに構成されている。又、内枠１６ａの縦横の差
渡し長さは、何れもＰＴＣポリマー板１の長さより、Ｐ
ＴＣポリマー板１の厚みの１／２以下ほど長くなってい
る。従って、この実施の形態３の絶縁枠１６もまた、上
記実施の形態１に示した図１と同様に、Ｂ−Ａ≦Ａ／
２、Ｄ−Ｃ≦Ａ／２の関係にある。In the third embodiment, similarly to the first embodiment, the gap between the PTC polymer plate 1 and the insulating frame 16 whose inner peripheral surface has a U-shaped cross section is 、 of that of the PTC polymer plate 1. It has the following thickness. Further, the length of the inner frame 16a in the vertical and horizontal directions is more than the length of the PTC polymer plate 1 by P.
The length is about 1/2 or less of the thickness of the TC polymer plate 1. Therefore, the insulating frame 16 according to the third embodiment also has BA-A ≦ A /, as in FIG. 1 shown in the first embodiment.
2. There is a relation of DC ≦ A / 2.
【００３０】この実施の形態において、ＰＴＣポリマー
板１の厚みを１ｍｍとし、ＰＴＣポリマー板１と内周面
の断面がコ字状の絶縁枠１６との隙間を、０．１ｍｍ、
０．２ｍｍ、０．４ｍｍ、０．６ｍｍ、０．８ｍｍとす
る試料を製作し限流試験を行った。その結果、０．１ｍ
ｍ、０．２ｍｍ、０．４ｍｍの隙間では、３回の限流動
作に成功した。０．６ｍｍのの隙間では２回目で絶縁破
壊した。０．８ｍｍの隙間では、１回目で絶縁破壊し
た。この限流試験結果より、ＰＴＣポリマー板１と絶縁
枠１６との隙間は、ＰＴＣポリマー板１の１／２の厚さ
が好ましいことが示された。従って、この実施の形態３
においても、簡易に絶縁枠を形成できるとともに、２つ
の電極２、３間の絶縁破壊を防止できる絶縁枠１６をＰ
ＴＣポリマー板１にストレスを与えないで設けることが
できた。In this embodiment, the thickness of the PTC polymer plate 1 is 1 mm, and the gap between the PTC polymer plate 1 and the insulating frame 16 whose inner peripheral surface has a U-shaped cross section is 0.1 mm.
Samples of 0.2 mm, 0.4 mm, 0.6 mm, and 0.8 mm were manufactured and subjected to a current limiting test. As a result, 0.1m
In the gaps of m, 0.2 mm, and 0.4 mm, the current limiting operation was successfully performed three times. In the gap of 0.6 mm, the dielectric breakdown occurred the second time. In the gap of 0.8 mm, the first dielectric breakdown occurred. The results of the current limiting test show that the gap between the PTC polymer plate 1 and the insulating frame 16 is preferably half the thickness of the PTC polymer plate 1. Therefore, the third embodiment
Also, the insulating frame 16 which can easily form an insulating frame and can prevent dielectric breakdown between the two
The TC polymer plate 1 could be provided without applying stress.
【００３１】[0031]
【発明の効果】請求項１乃至請求項９の発明によれば、
絶縁枠をＰＴＣ素子板と別途に成形し生産することがで
きるので、従来のように、絶縁枠９の形成時に熱的スト
レスが加わったり常温に冷却される際などに、絶縁枠が
縮んで限流素子が反ったり、割れたりすることがなくな
り、生産性を向上させることができる。又、ＰＴＣ素子
板と絶縁枠との間に間隙を設けているので、従来のよう
な、絶縁枠を別途成形した後にＰＴＣポリマー板１の外
縁周面に密着させた構成では、大きな短絡電流を限流す
ると、熱膨張によりＰＴＣポリマー板が大きく伸び、絶
縁枠が押されて変形したり、ＰＴＣ素子板との間に大き
な隙間が開いたり、ＰＴＣ素子板にストレスが加わって
割れたりして、電極２と電極３との間で絶縁破壊すると
いう問題が生じたが、これらの諸問題をれ解消すること
ができ、大きな短絡電流が流れても絶縁破壊が生じ難
く、耐久性の高い限流素子を提供することができる。According to the first to ninth aspects of the present invention,
Since the insulating frame can be formed separately from the PTC element plate and produced, as in the conventional case, when the insulating frame 9 is subjected to thermal stress or cooled to room temperature, the insulating frame shrinks and is limited. The flow element does not warp or break, and productivity can be improved. In addition, since a gap is provided between the PTC element plate and the insulating frame, in a conventional configuration in which the insulating frame is separately formed and then closely attached to the outer peripheral surface of the PTC polymer plate 1, a large short-circuit current is generated. When the current limit occurs, the PTC polymer plate expands greatly due to thermal expansion, the insulating frame is pressed and deformed, a large gap is opened between the PTC device plate, and the PTC device plate is cracked by applying stress. Although the problem of dielectric breakdown between the electrode 2 and the electrode 3 has occurred, these problems can be solved and the dielectric breakdown does not easily occur even when a large short-circuit current flows. An element can be provided.
【００３２】又、請求項２の発明によれば、ＰＴＣ素子
板と絶縁枠との間に間隙を設けたことにより、絶縁枠
は、絶縁破壊を防止する絶縁枠としての機能を果たしつ
つ、ＰＴＣ素子板にストレスを与えないでこれを保持す
ることができ、従って、限流動作回数を増加させること
ができる。According to the second aspect of the present invention, since the gap is provided between the PTC element plate and the insulating frame, the insulating frame functions as an insulating frame for preventing dielectric breakdown while maintaining the PTC function. This can be maintained without applying stress to the element plate, and therefore, the number of current limiting operations can be increased.
【００３３】又、請求項６の発明によれば、２つの電極
間の絶縁破壊を防止できる絶縁枠をＰＴＣポリマー板に
ストレスを与えないで設けることができるため、限流動
作回数を増加させることができ、耐久性の高い限流素子
を提供することができる。According to the sixth aspect of the present invention, the insulating frame capable of preventing dielectric breakdown between the two electrodes can be provided without applying stress to the PTC polymer plate, so that the number of current limiting operations can be increased. Thus, a current limiting element having high durability can be provided.
【００３４】又、請求項７の発明によれば、簡便な絶縁
枠を形成することができるとともに、２つの電極間の絶
縁破壊を防止できる絶縁枠をＰＴＣポリマー板にストレ
スを与えないで設けることができるため、限流動作回数
を増加させることができ、耐久性の高い限流素子を提供
することができる。According to the seventh aspect of the present invention, a simple insulating frame can be formed, and an insulating frame capable of preventing dielectric breakdown between two electrodes can be provided without applying stress to the PTC polymer plate. Therefore, the number of current limiting operations can be increased, and a current limiting element with high durability can be provided.
【図１】 限流素子の要部を示す側断面図である。FIG. 1 is a side sectional view showing a main part of a current limiting element.
【図２】 ＰＴＣ素子板と２つの電極と絶縁枠との分解
斜視図である。FIG. 2 is an exploded perspective view of a PTC element plate, two electrodes, and an insulating frame.
【図３】 図２の一部断面図である。FIG. 3 is a partial sectional view of FIG. 2;
【図４】 支承部の設置態様を示す概念図である。FIG. 4 is a conceptual diagram showing an installation mode of a bearing.
【図５】 支承部の設置態様を示す別の概念図である。FIG. 5 is another conceptual diagram showing an installation mode of a bearing.
【図６】 支承部の設置態様を示す更に別の概念図であ
る。FIG. 6 is still another conceptual diagram showing an installation mode of a bearing.
【図７】 実施の形態２の絶縁枠の斜視図である。FIG. 7 is a perspective view of an insulating frame according to the second embodiment.
【図８】 実施の形態２の絶縁枠の斜視図である。FIG. 8 is a perspective view of an insulating frame according to the second embodiment.
【図９】 従来の限流素子を示す側断面図である。FIG. 9 is a side sectional view showing a conventional current limiting element.
１ ＰＴＣ素子板（ＰＴＣポリマー板）、２、３ 電
極、４、５ 絶縁部材、１４ 絶縁枠、１４ａ 内枠、
１４ｂ 外枠、１４ｃ 係止突起、１４ｄ 係止穴、１
４ｚ 支承部、１５ 絶縁枠、１５ａ 内枠、１５ｂ
外枠、１５ｃ 係止突起、１５ｄ 係止穴、１５ｆ 折
曲部、１６ 絶縁枠、１６ａ 内枠、１６ｃ 差込口。1 PTC element plate (PTC polymer plate), 2, 3 electrodes, 4 and 5 insulating member, 14 insulating frame, 14a inner frame,
14b outer frame, 14c locking projection, 14d locking hole, 1
4z bearing, 15 insulating frame, 15a inner frame, 15b
Outer frame, 15c locking projection, 15d locking hole, 15f bent portion, 16 insulating frame, 16a inner frame, 16c insertion port.
フロントページの続き (72)発明者 高橋 知恵 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 西山 逸雄 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 堀邊 英夫 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 石川 雅廣 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 村田 士郎 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 仁科 健一 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 (72)発明者 曽我部 学 東京都千代田区丸の内二丁目２番３号 三 菱電機株式会社内 Ｆターム(参考） 5E034 AA07 AB01 AC10 DA02 DB06Continuing on the front page (72) Inventor Tomoe Takahashi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Itsuo 2-3-2 Marunouchi 2-chome, Chiyoda-ku, Tokyo Mitsubishi Electric Inside the company (72) Inventor Hideo Horibe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Masahiro Ishikawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric stock Inside the company (72) Inventor Shiro Murata 2-3-2 Marunouchi, Chiyoda-ku, Tokyo, Japan Mitsubishi Electric Corporation (72) Inventor Kenichi Nishina 2-3-2, Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Manabu Sogabe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation (reference) 5E034 AA07 AB01 AC10 DA02 DB06
Claims (8)
縁周面を囲んでＰＴＣ素子板を保持する絶縁枠とを備え
た限流素子において、前記絶縁枠はＰＴＣ素子板との間
に隙間を設けて当該ＰＴＣ素子板を保持させたことを特
徴とする限流素子。1. A current limiting device comprising a PTC element plate and an insulating frame surrounding the outer peripheral surface of the PTC element plate and holding the PTC element plate, wherein the insulating frame has a gap between the PTC element plate and the PTC element plate. Wherein the current limiting element is provided to hold the PTC element plate.
縁周面を包むように内周面が断面コ字状に形成された絶
縁枠とを備えた限流素子において、ＰＴＣ素子板と前記
絶縁枠の内周面との間に間隙を設けて構成したことを特
徴とする限流素子。2. A current limiting device comprising a PTC element plate and an insulating frame having an inner peripheral surface formed in a U-shape in cross section so as to surround an outer peripheral surface of the PTC element plate. A current-limiting element, wherein a gap is provided between the frame and an inner peripheral surface of the frame.
枠に形成された複数の支承部により断面コ字状に形成さ
れたことを特徴とする請求項２に記載の限流素子。3. The current limiting element according to claim 2, wherein the gap is formed in a U-shaped cross section by a plurality of support portions formed on the insulating frame to support the PTC element plate.
／２であることを特徴とする請求項２又は請求項３に記
載の限流素子。4. The width of the gap is a maximum of one plate thickness of the PTC element plate.
The current limiting element according to claim 2 or 3, wherein the current limiting element is equal to / 2.
置された内周面が断面コ字状の絶縁枠は、内周面が断面
Ｌ字状に形成された一対の枠構成部材を向かい合わせに
合致させた構成としたことを特徴とする請求項２又は請
求項３に記載の限流素子。5. An insulating frame having a U-shaped cross-section on the inner peripheral surface arranged so as to surround the outer peripheral surface of the PTC element plate faces a pair of frame constituent members having an inner peripheral surface formed in an L-shaped cross section. The current limiting element according to claim 2 or 3, wherein the current limiting element is configured to match the alignment.
置された内周面が断面コ字状の絶縁枠は、内周面が断面
Ｌ字状に形成された一対の枠構成部材の一辺側を屈曲自
在に連結し、当該屈曲軸を中心にして向かい合わせに閉
じあわせた構成としたことを特徴とする請求項２又は請
求項３に記載の限流素子。6. An insulating frame having an inner peripheral surface having a U-shaped cross section, which is disposed so as to wrap the outer peripheral peripheral surface of the PTC element plate, wherein one side of a pair of frame constituting members having an inner peripheral surface formed into an L-shaped cross section. The current limiting element according to claim 2 or 3, wherein the sides are flexibly connected to each other and closed face-to-face around the bending axis.
置された内周面が断面コ字状の絶縁枠は、ＰＴＣ素子板
を当該絶縁枠の一辺に形成された差入口から差し込んだ
後、差入口が絶縁素材で封鎖された構成としたことを特
徴とする請求項２又は請求項３に記載の限流素子。7. An insulating frame having a U-shaped cross section, which is disposed so as to surround the outer peripheral surface of the PTC element plate, is formed by inserting the PTC element plate from a slot formed on one side of the insulating frame. The current limiting element according to claim 2 or 3, wherein the inlet is closed with an insulating material.
Ｃポリマー板であることを特徴とする請求項１乃至請求
項７の何れかに記載の限流素子。8. The PTC element plate has a PT characteristic.
The current limiting element according to claim 1, wherein the current limiting element is a C polymer plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18450398A JP3830661B2 (en) | 1998-06-30 | 1998-06-30 | Current limiting element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18450398A JP3830661B2 (en) | 1998-06-30 | 1998-06-30 | Current limiting element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000021604A true JP2000021604A (en) | 2000-01-21 |
| JP3830661B2 JP3830661B2 (en) | 2006-10-04 |
Family
ID=16154337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18450398A Expired - Fee Related JP3830661B2 (en) | 1998-06-30 | 1998-06-30 | Current limiting element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3830661B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100697918B1 (en) | 2005-01-12 | 2007-03-20 | 엘에스전선 주식회사 | PTC current limiting device having structure preventing flashover |
-
1998
- 1998-06-30 JP JP18450398A patent/JP3830661B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100697918B1 (en) | 2005-01-12 | 2007-03-20 | 엘에스전선 주식회사 | PTC current limiting device having structure preventing flashover |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3830661B2 (en) | 2006-10-04 |
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