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91. 发明专利

JPH09204868A BREAKER TRIP DEVICE 失效
公开(公告)号：JPH09204868A
公开(公告)日：1997-08-05
申请号：JP1237396
申请日：1996-01-29
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： OIDO TOSHIHIRO , TSUGIHATA YASUSHI , HIRAO AKIHIKO , SAWADA TOMOYUKI
IPC分类号： H01H71/24 , H01H73/36
摘要： PROBLEM TO BE SOLVED: To prevent partial saturation of a yoke even if excess current flows in a breaker, prevent drop in attraction force to a movable iron core, and surely break an electric circuit by thickening the bottom part section of a U-shaped yoke than the side part section. SOLUTION: For example, when the bottom part cross section of a U-shaped yoke is intended to make two times the two side part cross sections, a part corresponding to the side part of a plate body equivalent to two times thickness is cut or forged to form the same shape, and the thin part is bent in a U shape to form a yoke. The partial saturation of the yoke 3 is not produced, the magnetic efficiency of a magnetic circuit comprising the yoke 3 and a movable iron core 2 is not decreased, the attraction force to the movable iron core is not also decreased. Even if excess current in a relatively large region flows, the movable iron core 2 is attracted to the yoke and an electric circuit can be broken.

92. 发明专利

JP2572811B2 失效
公开(公告)号：JP2572811B2
公开(公告)日：1997-01-16
申请号：JP11536588
申请日：1988-05-12
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： HIRAO AKIHIKO , AOYAMA YOICHI
IPC分类号： H01H71/02 , H01H73/06 , H01H73/20

93. 发明专利

JPH08264098A CIRCUIT BREAKER 失效
公开(公告)号：JPH08264098A
公开(公告)日：1996-10-11
申请号：JP6946395
申请日：1995-03-28
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： OIDO TOSHIHIRO , HIRAO AKIHIKO , TSUGIHATA YASUSHI
IPC分类号： H01H73/18 , H01H73/38
摘要： PURPOSE: To reduce contact parting time to enhance reliability by providing a movable-contact attractor consisting of a connecting piece located on the upper wall of a case and a movable contact placed on the lower wall of the case. CONSTITUTION: A movable-contact attractor 21 made of a magnetic material is adapted to attract a movable contact 7 and is formed into an approximately U shape from opposite pieces 21a, 21a and a connecting piece 21b. The attractor 21 is integrated with a yoke 15 and a second arc traveling plate 20 by welding, etc., with the connecting piece 21b located on the parting side of the contact 7 (the upper wall 1e of a case 1) and with the contact 7 placed on the open side of the connecting piece 21b (the lower wall 1f of the case 1). Magnetic flux generated from current flowing through the contact 7 flows through the attractor 21, and the contact 7 is attracted to the attractor 21 according to the density of the magnetic flux. Therefore, parting speed is increased and the contacts can be opened in a short time, and when opened the contact 7 is held in the open position by the attractor 21 as long as a current is kept flowing by an arc; the arc is extinguished readily.

94. 发明专利

JPH06187893A CIRCUIT BREAKER 失效
公开(公告)号：JPH06187893A
公开(公告)日：1994-07-08
申请号：JP34010592
申请日：1992-12-21
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： HIRAO AKIHIKO , AOYAMA YOICHI , SAWADA TOMOYUKI , HIROSHIMA TATSUO , MATSUOKA YUKIHIRO
IPC分类号： H01H73/36
摘要： PURPOSE:To improve assembly without lowering magnetic performance when short circuit current is flowed. CONSTITUTION:A frame 10, supporting the respective members of an opening/ closing mechanism part 7, is formed by magnetic material, and is constituted so as to be interposed with a frame 10 between a latch movable piece 13, formed when at least shortcircuit current is flowed, and the magnetic path of magnetic flux by h fixed magnetic piece 15. In concrete, the fixed magnetic piece 15 is L-shapedly formed by a base part 15a opposite to bimetal 14 and a folded part 15b foldedly provided in range toward a latch movable piece 13 from a base part, and is arranged so that a folded part 15b and a flame 10 can be faced to each other with the bimetal 14 between them.

95. 发明专利

JPH06162912A CIRCUIT BREAKER 失效
公开(公告)号：JPH06162912A
公开(公告)日：1994-06-10
申请号：JP31517792
申请日：1992-11-25
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SAWADA TOMOYUKI , HIRAO AKIHIKO
IPC分类号： H01H73/22
摘要： PURPOSE:To prevent plastic deformation of a bimetal by fixing a middle part in the longitudinal direction of the bimetal, and supporting a spring member between a latch movable member and an end part on the opposite side to a latch movable member driving side of the bimetal. CONSTITUTION:When abnormal current is not supplied, a stop member 9 is stopped by a latch movable member 13 in a latch condition. When the abnormal current is supplied, one end part 15a of a bimetal 15 which is fixed to a terminal plate 16 at a middle part in its longitudinal direct is flexed counterclockwise, while an end part 15b on the other side is flexed clockwise, so the latch movable member 13 rotates counterclockwise against spring force of a spring member 14, and a counter part 9a for the stop member 9 is removed from a stop part 13a of the latch movable member 13 for performing trip action. In case a temperature rise occurs at the bimetal 15, therefore, both sides of its middle part are flexed, so if tolerance of the bimetal 15 is reduced, stress applied on the bimetal 15 by the spring member 14 is also reduced, thereby the stress applied on the bimetal 15 is hard to exceed its tolerable stress.

96. 发明专利

JPH0696656A THREE-POLE CIRCUIT BREAKER 失效
公开(公告)号：JPH0696656A
公开(公告)日：1994-04-08
申请号：JP24352892
申请日：1992-09-11
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： SAWADA TOMOYUKI , HIRAO AKIHIKO
IPC分类号： H01H73/06
摘要： PURPOSE:To provide a three-pole circuit breaker highly reliable for tripping operation and inexpensive, without any recourse to a special adjusting process, exclusive parts, or the like. CONSTITUTION:Three single-pole type circuit breakers 1, each with a case 2 housing a bimetal and having an exhaust opening section 2A for discharging arc gas, are arranged in parallel. In this case, an interlock system is provided, so that when one of the breakers 1 trips, others also concurrently trip. Regarding these single-pole type circuit breakers 1, the opening area of the section 2A is formed in such a way that the center breaker has a larger area than others.

97. 发明专利

JPH063698B2 失效
公开(公告)号：JPH063698B2
公开(公告)日：1994-01-12
申请号：JP13864185
申请日：1985-06-25
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： HORIUCHI KENICHIRO , HIRAO AKIHIKO , SHIROKURA KAORU , AOYAMA YOICHI
IPC分类号： H01H9/38

98. 发明专利

JPH0520998A CIRCUIT BREAKER 失效
公开(公告)号：JPH0520998A
公开(公告)日：1993-01-29
申请号：JP17131791
申请日：1991-07-11
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： HIRAO AKIHIKO , SAWADA TOMOYUKI , TAKAYAMA SHINJI , AOYAMA YOICHI , MATSUOKA YUKIHIRO , HIROSHIMA TATSUO
IPC分类号： H01H73/24
摘要： PURPOSE:To facilitate the assembly work of a circuit breaker so as to facilitate the automatic assembly thereof as compared with the case where a draw spring is used, so that the mass-producibility of the circuit breaker may be raised to reduce the manufacturing cost thereof by compressively interposing a reversing spring between a cradle and a movable contact-maker. CONSTITUTION:A compressed reversing-spring 46 is suspended between spring- bearing portions 44 and 45 provided to both of a movable contact-maker 38 and a cradle 31. When a movable contact-point 41 and a stationary contact-point 42 are closed and also when the locking portion 37 of the cradle 31 is locked in the locking bearing portion 51 of an abnormal current detecting means 14, the spring 46 applies contact pressure between both contact-points. When the locking portion 37 is released from the bearing portion 51 of the means 14, the spring makes its reverse movement so that the contact-maker 38 and the cradle 31 may be rotated in a direction wherein the contact-point 41 is detached from the contact point 42. The use of a compressed spring for the reversing spring 46 can facilitate the assembly work of arranging component members and locking the members with one another or the like so as to make even the automatic assembly.

99. 发明专利

JPH0520954A ARC EXTINGUISHER 失效
公开(公告)号：JPH0520954A
公开(公告)日：1993-01-29
申请号：JP17231391
申请日：1991-07-12
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： TAKAYAMA SHINJI , SAWADA TOMOYUKI , HIRAO AKIHIKO , AOYAMA YOICHI , MATSUOKA YUKIHIRO , HIROSHIMA TATSUO
IPC分类号： H01H9/34 , H01H33/08
摘要： PURPOSE:To provide an arc extinguisher capable of securely shutting off a DC and an AC semi-wave at a low cost. CONSTITUTION:An arc extinguisher is provided with a pair of U-shaped magnetic members 1, 2 facing to each other, each comprising a bottom serving as an arc flow changing portion 4 and a pair of side portions serving as electromagnetic paths 6, 7; and connecting portions 3 for connecting the tip ends of the magnetic member 1, 2 in the direction of side portions opposite to each other. When an arc generated between contacts penetrates inside the magnetic members 1, 2, it is magnetically attracted to the arc flow changing portions 4. A W-shaped current path is formed of the electromagnetic paths 6, 7 and the arc between the contacts. Accordingly, the arc extends upon receipt of electromagnetic repulsive force caused by a current flowing in the electromagnetic paths 6, 7, to be thus extinguished.

100. 发明专利

JPH0454324B2 失效
公开(公告)号：JPH0454324B2
公开(公告)日：1992-08-31
申请号：JP31494787
申请日：1987-12-11
申请人： MATSUSHITA ELECTRIC WORKS LTD
发明人： HIRAO AKIHIKO , AOYAMA YOICHI , MATSUDA JUNICHI , SAWADA TOMOYUKI
IPC分类号： H01H9/44 , H01H9/30 , H01H73/18

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