JPH0181842U

JPH0181842U -

Info

Publication number: JPH0181842U
Application number: JP1987177948U
Authority: JP
Priority date: 1987-11-20
Filing date: 1987-11-20
Publication date: 1989-05-31
Also published as: ZA888660B

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す部分縦断拡
大図、第２図は従来のものを示す縦断側面図、第
３図はオン状態を示す第２図の要部拡大図、第４
図はオフ状態を示す第３図と同じ図、第５図はト
リツプ状態を示す第３図と同じ図、第６図は反発
状態を示す第３図と同じ図、第７図は第６図の部
分縦断拡大図である。図において、４は自動引きはずし装置、７は可
動子、１０はコンタクトアーム、１０Ａは第１の
コンタクトアーム、１０Ｂは第２のコンタクトア
ーム、１１は第１のピン、１２は支軸、１４はガ
イド孔、１４ａは端部、１４ｃはピン衝動面、１
５は長孔、１５ａはピン衝動面、１６Ａは第２の
ピン、１６ａは当接面、１７はばねである。なお
、各図中同一符号は同一または相当部分を示す。 Fig. 1 is a partially enlarged vertical sectional view showing an embodiment of this invention, Fig. 2 is a vertical sectional side view showing a conventional one, Fig. 3 is an enlarged view of the main part of Fig. 2 showing the on state, and Fig. 4
The figures are the same as Figure 3 showing the OFF state, Figure 5 is the same as Figure 3 showing the trip state, Figure 6 is the same as Figure 3 showing the repulsion state, and Figure 7 is the same as Figure 6. It is a partial vertical enlarged view of . In the figure, 4 is an automatic tripping device, 7 is a mover, 10 is a contact arm, 10A is a first contact arm, 10B is a second contact arm, 11 is a first pin, 12 is a support shaft, and 14 is a Guide hole, 14a is the end, 14c is the pin impulse surface, 1
5 is a long hole, 15a is a pin impulse surface, 16A is a second pin, 16a is a contact surface, and 17 is a spring. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of Claim for Utility Model Registration] (1) A circuit breaker that performs current limiting by separating the mover by electromagnetic repulsion due to the application of a large current, regardless of the interrupting operation by an automatic tripping device. , the contact arm holding the movable element is divided into a first contact arm and a second contact arm that are mutually rotatably supported, and an opening/closing mechanism is provided on the first contact arm that is linked. a guide hole extending in the opening/closing direction; a long hole provided in the second contact arm in which the mover is supported by the first pin and extending in a direction intersecting the guide hole; the long hole and the guide hole; In the circuit breaker, the circuit breaker has a second pin that straddles and engages the second pin, and a spring that biases the second pin, wherein at least the pin sliding surface of the guide hole of the first contact arm and the first A low-friction treatment is applied to at least the pin sliding surface of the elongated hole of the second contact arm and a contact surface of the second pin that abuts at least both of the pin sliding surfaces, so that the both of the pin sliding surfaces and the A circuit breaker characterized by low frictional resistance with the contact surface. (2) The circuit breaker according to claim 1, wherein the low friction treatment is a solid film lubricant treatment.