JPS645331Y2 - - Google Patents
Info
- Publication number
- JPS645331Y2 JPS645331Y2 JP1983189582U JP18958283U JPS645331Y2 JP S645331 Y2 JPS645331 Y2 JP S645331Y2 JP 1983189582 U JP1983189582 U JP 1983189582U JP 18958283 U JP18958283 U JP 18958283U JP S645331 Y2 JPS645331 Y2 JP S645331Y2
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- metal case
- fusible alloy
- movable contact
- fusible
- 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
- 229910000743 fusible alloy Inorganic materials 0.000 claims description 38
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 28
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000000155 melt Substances 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000008188 pellet Substances 0.000 description 9
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
【考案の詳細な説明】
技術分野
この考案は特定温度で閉となる常開型の温度ヒ
ユーズに関し、より詳しくは可溶合金を用いた速
断型の温度ヒユーズに関する。[Detailed Description of the Invention] Technical Field This invention relates to a normally open temperature fuse that closes at a specific temperature, and more specifically to a fast acting temperature fuse using a fusible alloy.
従来技術
電気機器の過熱損傷や火災を未然に防止するた
めに、温度過昇防止装置が内蔵されるようになつ
てきている。この種温度過昇防止装置には、バイ
メタルを用いた可復帰型のものと、特定温度で溶
融する絶縁性化学物質よりなる感温ペレツトや可
溶合金を用いた無復帰型の温度ヒユーズとがあ
る。BACKGROUND ART In order to prevent overheating damage and fires in electrical equipment, overheating prevention devices are increasingly being built into electrical equipment. This type of overheat prevention device includes a resetting type that uses bimetal, and a non-resetting type temperature fuse that uses a thermosensitive pellet or fusible alloy made of an insulating chemical substance that melts at a specific temperature. be.
この種の温度ヒユーズとして、常時は回路が開
放されており、異常温度上昇時に回路を閉成する
常開型の温度ヒユーズが考えられている。この種
のものとしては、感温ペレツトを用いたものとし
て、例えば実開昭52−7036号公報や実開昭57−
138245号公報に開示されるものがある。しかし、
感温ペレツトを用いたものは、動作時に、感温ペ
レツトの溶融物が可動接点と固定接点との間に介
在されるので、両接点の電気的接続が不確実にな
りやすいという欠点がある。一方、可溶合金を用
いたものとしては、例えば特開昭54−1884号公報
や特開昭54−1885号公報に開示されるように、ボ
ール状可溶合金や円筒状可溶合金を用いるものが
ある。これらは可溶合金のみで金属ケースとリー
ド線間を接続するので、可溶合金表面に形成され
ていた酸化膜等を介在して接続される場合があ
り、内部抵抗が大きいという欠点がある。 As this type of temperature fuse, a normally open type temperature fuse is considered, which normally has an open circuit and closes the circuit when the temperature rises abnormally. Examples of this type of pellets using temperature-sensitive pellets include, for example, Japanese Utility Model Application Publication No. 52-7036 and Japanese Utility Model Application No. 57-57.
There is one disclosed in Publication No. 138245. but,
Those using temperature-sensitive pellets have the disadvantage that during operation, the melted material of the temperature-sensitive pellet is interposed between the movable contact and the fixed contact, so that the electrical connection between the two contacts tends to be unstable. On the other hand, examples using fusible alloys include ball-shaped fusible alloys and cylindrical fusible alloys, as disclosed in JP-A-54-1884 and JP-A-54-1885. There is something. Since the metal case and the lead wires are connected only by a fusible alloy, the connection may be made through an oxide film or the like formed on the surface of the fusible alloy, resulting in a high internal resistance.
考案の目的
そこで、この考案は可溶合金を用いて特定温度
で閉となる、構造が簡単で、内部抵抗が小さい安
価な常開型の温度ヒユーズを提供することを目的
とする。Purpose of the invention Therefore, the purpose of this invention is to provide an inexpensive normally open temperature fuse that uses a fusible alloy and closes at a specific temperature, has a simple structure, and has a low internal resistance.
考案の構成
この考案は、金属ケースの両端に一対のリード
線を同軸上に所定間隔で配置し、前記金属ケース
に対して一方のリード線を電気的に接続し他方の
リード線を絶縁ブツシングを介して電気的に絶縁
し、金属ケースと電気的に接続された側のリード
線の内先端に、低融点可溶合金を介して、その周
縁部が前記金属ケースの内面を押圧する可動接点
を固着し、この可動接点を前記可溶合金が溶融し
た際に他方のリード線に向つて移動させ可溶合金
を介して接続せしめる圧縮ばねを設けたことを特
徴とするものである。Structure of the invention In this invention, a pair of lead wires are coaxially arranged at a predetermined interval at both ends of a metal case, one lead wire is electrically connected to the metal case, and the other lead wire is connected to an insulating bushing. A movable contact whose peripheral edge presses against the inner surface of the metal case is provided at the inner tip of the lead wire on the side that is electrically insulated through the metal case and electrically connected to the metal case through a low melting point fusible alloy. The present invention is characterized in that it is provided with a compression spring that is firmly fixed and moves this movable contact toward the other lead wire when the fusible alloy melts, thereby connecting the movable contact through the fusible alloy.
すなわち、金属ケースと一方のリード線とは直
接電気的に接続するとともに、金属ケースの内面
に押圧する可動接点と、可動接点とリード線とを
固着する可溶合金を介して接続しているので、感
温ペレツトのような粘性流動を起すこともない。
さらに、可溶合金が溶融すると圧縮ばねが伸張し
て、可動接点を一方のリード線の先端から切り離
して他方のリード線に押圧し可溶合金を介して接
続するので、動作速度が大きくスパーク等を発生
しない。また、部品点数が少なく比較的安価であ
る。 In other words, the metal case and one lead wire are directly electrically connected, and they are also connected via a movable contact that presses against the inner surface of the metal case and a fusible alloy that fixes the movable contact and the lead wire. , it does not cause viscous flow like temperature-sensitive pellets.
Furthermore, when the fusible alloy melts, the compression spring expands and separates the movable contact from the tip of one lead wire and presses it onto the other lead wire, connecting it through the fusible alloy, increasing the operating speed and causing sparks. does not occur. In addition, it has a small number of parts and is relatively inexpensive.
実施例
以下に、この考案の実施例を図面を参照して説
明する。Embodiments Below, embodiments of this invention will be described with reference to the drawings.
第１図はこの考案の一実施例の常開型温度ヒユ
ーズの断面図を示す。図において、１１は銅等よ
りなる円筒状の金属ケースで、その一方端はセラ
ミツク等よりなる絶縁ブツシング１２で閉塞され
ており、絶縁ブツシング１２の中心孔を貫通して
リード線１３が装着されている。このリード線１
３の内方端には所定の融点の可溶合金１４が被着
されている。１５は金属ケース１１の他方端を閉
塞するセラミツク等よりなる絶縁ブツシングで、
その中心孔を貫通してリード線１６が装着されて
いる。そして、前記金属ケース１１は前記絶縁ブ
ツシング１５をすつぽりと覆つて、リード線１６
にかしめ固着されている。１７は導電性の良好な
銀合金等よりなる可動接点で、その中央部に凹所
が形成されており、この凹所は可溶合金１８を介
して前記リード線１６の内先端に固着されてお
り、周縁部は金属ケース１１の内面を押圧してい
る。１９は前記絶縁ブツシング１５と可動接点１
７との間に介在された圧縮ばねである。２０，２
１はエポキシ樹脂等の封口樹脂である。 FIG. 1 shows a sectional view of a normally open temperature fuse according to an embodiment of this invention. In the figure, 11 is a cylindrical metal case made of copper or the like, one end of which is closed with an insulating bushing 12 made of ceramic or the like, and a lead wire 13 is inserted through the center hole of the insulating bushing 12. There is. This lead wire 1
A fusible alloy 14 having a predetermined melting point is deposited on the inner end of 3. 15 is an insulating bushing made of ceramic or the like that closes the other end of the metal case 11;
A lead wire 16 is attached to pass through the center hole. The metal case 11 completely covers the insulating bushing 15 and the lead wire 16
It is caulked and fixed. Reference numeral 17 denotes a movable contact made of a silver alloy or the like having good conductivity, and has a recess formed in its center, and this recess is fixed to the inner tip of the lead wire 16 via a fusible alloy 18. The peripheral edge presses against the inner surface of the metal case 11. 19 is the insulating bushing 15 and the movable contact 1
This is a compression spring interposed between 7 and 7. 20,2
1 is a sealing resin such as epoxy resin.
上記の構成において、常温時または可溶合金１
４，１８の融点未満の温度では、可溶合金１４，
１８が固体であり、可動接点１７は可溶合金１８
を介してリード線１６の内先端に固着されたまま
であり、金属ケース１１とリード線１６とは、可
動接点１７および可溶合金１８を介して電気的に
接続されている。また、金属ケース１１とリード
線１６とは、直接かしめ固着によつても電気的に
接続されている。しかし、金属ケース１１と他方
のリード線１３とは、絶縁ブツシング１２を介し
て絶縁されている。したがつて、リード線１３と
リード線１６との間は非導通状態である。 In the above configuration, at room temperature or fusible alloy 1
At temperatures below the melting point of 4,18, the fusible alloy 14,
18 is a solid, and the movable contact 17 is a fusible alloy 18
The metal case 11 and the lead wire 16 are electrically connected to each other via the movable contact 17 and the fusible alloy 18 . Further, the metal case 11 and the lead wire 16 are electrically connected by direct caulking. However, the metal case 11 and the other lead wire 13 are insulated via the insulating bushing 12. Therefore, there is no conduction between the lead wire 13 and the lead wire 16.
周囲温度が可溶合金１４，１８の融点に達する
と、可溶合金１４，１８が溶融する。応じて、圧
縮ばね１９が伸張し、可動接点１７が図示左方に
押圧移動されて、第２図に示すように、リード１
３の内先端に当接して、リード線１３−可溶合金
１４−可動接点１７−金属ケース１１−リード線
１６の経路で、リード線１３とリード線１６の間
が導通状態にある。ここで、リード線１３の内先
端には可溶合金１４が被着されており溶融状態に
なつているので、リード線１３と可動接点１７は
確実に接続され、内部抵抗は小さい。周囲温度が
下降すると可溶合金１４が固化するので、可動接
点１７はリード線１３の内先端に固着されたまま
となる。 When the ambient temperature reaches the melting point of the fusible alloys 14, 18, the fusible alloys 14, 18 melt. In response, the compression spring 19 is expanded, and the movable contact 17 is pressed and moved to the left in the figure, so that the lead 1 is expanded as shown in FIG.
3, the lead wire 13 and the lead wire 16 are electrically connected through the path of the lead wire 13 - the fusible alloy 14 - the movable contact 17 - the metal case 11 - the lead wire 16. Here, since the fusible alloy 14 is coated on the inner tip of the lead wire 13 and is in a molten state, the lead wire 13 and the movable contact 17 are reliably connected and the internal resistance is small. As the ambient temperature falls, the fusible alloy 14 solidifies, so the movable contact 17 remains fixed to the inner tip of the lead wire 13.
上記実施例によれば、先に述べた感温ペレツト
を用いる常開型の温度ヒユーズに比較して、リー
ド線と可動接点との間に感温ペレツトの溶融物の
ような絶縁物が介在しないので、電気的接続が確
実であり、内部抵抗が小さい。また可溶合金を用
いるものに比較して、金属ケースとリード線との
間を可溶合金のみで接続するのではなく、圧縮ば
ねを利用して可動接点で可溶合金を押圧して用い
るので、溶融前の可溶合金表面の酸化膜による影
響がなく、内部抵抗が著しく小さい。場合によつ
ては、可溶合金１４を省略しても、十分に内部抵
抗が小さい。 According to the above embodiment, compared to the previously described normally open temperature fuse using a temperature-sensitive pellet, there is no insulator such as a melted temperature-sensitive pellet between the lead wire and the movable contact. Therefore, the electrical connection is reliable and the internal resistance is low. Also, compared to those that use fusible alloys, the metal case and lead wires are not connected using only fusible alloys, but are used by pressing the fusible alloys with movable contacts using compression springs. , there is no influence from the oxide film on the surface of the fusible alloy before melting, and the internal resistance is extremely low. In some cases, even if the fusible alloy 14 is omitted, the internal resistance is sufficiently low.
考案の効果
この考案は以上のように、金属ケースの両端に
一対のリード線を同軸上に所定間隔で配置し、前
記金属ケースに対して一方のリード線を電気的に
接続し他方のリード線を絶縁ブツシングを介して
電気的に絶縁し、金属ケースと電気的に接続され
た側のリード線の内先端に、可溶合金を介して、
その周縁部が金属ケースの内面を押圧する可動接
点を固着し、この可動接点を可溶合金が溶融した
際に、他方のリード線に向つて移動させて接触せ
しめる圧縮ばねを設けたから、従来の感温ペレツ
トや可溶合金を用いた常開型の温度ヒユーズに比
較して、動作が確実に内部抵抗の小さい安価な温
度ヒユーズを提供できる。Effects of the invention As described above, in this invention, a pair of lead wires are coaxially arranged at a predetermined interval at both ends of a metal case, one lead wire is electrically connected to the metal case, and the other lead wire is electrically connected to the metal case. The inner tip of the lead wire on the side that is electrically insulated through the insulating bushing and electrically connected to the metal case, through the fusible alloy,
The peripheral edge fixes a movable contact that presses against the inner surface of the metal case, and when the fusible alloy melts, a compression spring is provided that moves this movable contact toward the other lead wire and brings it into contact. Compared to normally open temperature fuses using temperature-sensitive pellets or fusible alloys, it is possible to provide an inexpensive temperature fuse that operates reliably and has low internal resistance.
第１図はこの考案の一実施例である常開型の温
度ヒユーズの断面図である。第２図は第１図の温
度ヒユーズの動作後の断面図である。
１１……金属ケース、１３，１６……リード
線、１２，１５……絶縁ブツシング、１７……可
動接点、１４，１８……可溶合金、１９……圧縮
ばね。
FIG. 1 is a sectional view of a normally open temperature fuse which is an embodiment of this invention. FIG. 2 is a sectional view of the temperature fuse of FIG. 1 after operation. 11... Metal case, 13, 16... Lead wire, 12, 15... Insulating bushing, 17... Movable contact, 14, 18... Fusible alloy, 19... Compression spring.
Claims (1)
上に所定間隔で配置し、前記金属ケースに対し
て一方のリード線を電気的に接続し他方のリー
ド線を絶縁ブツシングを介して電気的に絶縁
し、金属ケースと電気的に接続された側のリー
ド線の内先端に、可溶合金を介して、その周縁
部が前記金属ケースの内面を押圧する可動接点
を固着し、この可動接点を前記可溶合金が溶融
した際に他方のリード線に向つて移動させ可溶
合金を介して接続せしめる圧縮ばねを設けてな
る温度ヒユーズ。 ２ 前記他方のリード線は、内先端に可溶合金を
備えてなる、実用新案登録請求の範囲第１項記
載の温度ヒユーズ。[Claims for Utility Model Registration] 1. A pair of lead wires are coaxially arranged at a predetermined interval at both ends of a metal case, one lead wire is electrically connected to the metal case, and the other lead wire is connected to the metal case. A movable contact whose peripheral edge presses against the inner surface of the metal case through a fusible alloy, at the inner tip of the lead wire on the side that is electrically insulated through an insulating bushing and electrically connected to the metal case. and a compression spring that moves the movable contact toward the other lead wire when the fusible alloy melts and connects the movable contact through the fusible alloy. 2. The temperature fuse according to claim 1, wherein the other lead wire has a fusible alloy at its inner tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18958283U JPS6096750U (en) | 1983-12-07 | 1983-12-07 | temperature fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18958283U JPS6096750U (en) | 1983-12-07 | 1983-12-07 | temperature fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6096750U JPS6096750U (en) | 1985-07-02 |
| JPS645331Y2 true JPS645331Y2 (en) | 1989-02-09 |
Family
ID=30408707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18958283U Granted JPS6096750U (en) | 1983-12-07 | 1983-12-07 | temperature fuse |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6096750U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS527036B2 (en) * | 1972-12-19 | 1977-02-26 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4729428U (en) * | 1971-04-27 | 1972-12-04 | ||
| JPS527036U (en) * | 1975-07-01 | 1977-01-19 |
-
1983
- 1983-12-07 JP JP18958283U patent/JPS6096750U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS527036B2 (en) * | 1972-12-19 | 1977-02-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6096750U (en) | 1985-07-02 |
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