Title:
SPD WITH DISCONNECTION FUNCTION AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2008/010410
Kind Code:
A1
Abstract:
This invention provides a highly reliable SPD with a disconnection function
which can realize reliable thermal fuse operation upon abnormal heat generation
due to a deterioration in a zinc oxide varistor. A bent spring part (13c) is formed
in a disconnection conductor (13) connected to an electrode (11) of a zinc oxide
varistor (1) with the aid of a low melting temperature alloy (14), and the spring
part (13c) is housed in a case (30) containing all of the above elements, followed
by positioning. In this case, the varistor (1) is rotated in the case (30) to bend
the spring part (13c) of the disconnection conductor (13) in a predetermined
direction, so that spring forces in two different directions are applied to the
spring part (13c) by the displacement due to the bend of the spring part (13c).
When the low melting temperature alloy (14) is melted by the abnormal heat generation
in the varistor (1), the disconnection conductor (13) is separated from the electrode
(11) of the varistor (1) by utilizing the spring forces in two directions of the
spring part (13c).
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Inventors:
MISHIMA, Kenshichirou (20-17, Ayukawa 3-chome Ibaraki-sh, Osaka 31, 5670831, JP)
三島 健七郎 (〒31 大阪府茨木市鮎川３丁目２０－１７ Osaka, 5670831, JP)
IKEDA, Tsuyoshi (7-76, Obayashi 4-chome Takarazukashi Hyogo, 34, 6650034, JP)
池田 剛 (〒34 兵庫県宝塚市小林４丁目７－７６ Hyogo, 6650034, JP)
三島 健七郎 (〒31 大阪府茨木市鮎川３丁目２０－１７ Osaka, 5670831, JP)
IKEDA, Tsuyoshi (7-76, Obayashi 4-chome Takarazukashi Hyogo, 34, 6650034, JP)
池田 剛 (〒34 兵庫県宝塚市小林４丁目７－７６ Hyogo, 6650034, JP)
Application Number:
JP2007/063273
Publication Date:
January 24, 2008
Filing Date:
July 03, 2007
Export Citation:
Assignee:
OTOWA ELECTRIC CO., LTD. (12-13-401, Toyosaki 1-chome Kita-ku, Osaka-sh, Osaka 72, 5310072, JP)
音羽電機工業株式会社 (〒72 大阪府大阪市北区豊崎１丁目１２－１３－４０１ Osaka, 5310072, JP)
MISHIMA, Kenshichirou (20-17, Ayukawa 3-chome Ibaraki-sh, Osaka 31, 5670831, JP)
三島 健七郎 (〒31 大阪府茨木市鮎川３丁目２０－１７ Osaka, 5670831, JP)
IKEDA, Tsuyoshi (7-76, Obayashi 4-chome Takarazukashi Hyogo, 34, 6650034, JP)
音羽電機工業株式会社 (〒72 大阪府大阪市北区豊崎１丁目１２－１３－４０１ Osaka, 5310072, JP)
MISHIMA, Kenshichirou (20-17, Ayukawa 3-chome Ibaraki-sh, Osaka 31, 5670831, JP)
三島 健七郎 (〒31 大阪府茨木市鮎川３丁目２０－１７ Osaka, 5670831, JP)
IKEDA, Tsuyoshi (7-76, Obayashi 4-chome Takarazukashi Hyogo, 34, 6650034, JP)
International Classes:
H01H37/76; H01C7/12
Attorney, Agent or Firm:
EHARA, Syogo et al. (Ehara Patent Office, 15-26 Edobori 1-chome, Nishi-ku, Osaka-sh, Osaka 02, 5500002, JP)
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