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1. 发明专利

JP2003249160A TESTING CIRCUIT OF ELECTRIC LEAK DETECTING INSTRUMENT 审中-公开
公开(公告)号：JP2003249160A
公开(公告)日：2003-09-05
申请号：JP2002049033
申请日：2002-02-26
申请人： FUJI ELECTRIC CO LTD
发明人： WATANABE KATSUMI , HASEGAWA KIYOSHI , KOYAMA HIDEKI , KANEDA HITOSHI
IPC分类号： H01H83/04 , H01H83/02
摘要： PROBLEM TO BE SOLVED: To provide a ground fault circuit interrupter which prevents change of leak detecting sensitivity due to a noise current in a secondary winding caused by a stray capacitance between a test winding and the secondary winding. SOLUTION: The ground fault circuit interrupter 1 comprises a zero-phase current transformer 4 having the secondary winding 5 to lead out a zero-phase- sequence component of the current in main electric paths (R-U), (S-V), (T-W) and the test winding 11 to test-operate this interrupter 1, a leak detector 6 which opens an interrupting part 2 by energizing a trip coil 7 when a zero-phase current in the secondary winding 5 exceeds the predetermined one, and a rectifier circuit 10 which generates direct current for the leak detecting part 6 by rectifying the voltage of the main electric paths with one of direct current supply paths thereof, a ground line connected to a signal ground SG of the leak detecting part 6. When a test contact 9 is open and the interrupter 1 monitors leak, and potentials of the test winding 11 and the secondary winding 5 are the same because of the connection of one end of the test winding 11 to the ground line resulting in no noise current due to stray capacitance. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2002231119A EARTH LEAKAGE DETECTING CIRCUIT MODULE FOR EARTH LEAKAGE BREAKER, AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002231119A
公开(公告)日：2002-08-16
申请号：JP2001018216
申请日：2001-01-26
申请人： FUJI ELECTRIC CO LTD
发明人： HASEGAWA KIYOSHI , SATO KAZUHIKO , KAWASHIMA YOSHIAKI , MORIAI HIROSHI , AOKI TADAHISA , OGASAWARA MAKOTO
IPC分类号： H05K7/14 , H01H69/00 , H01H83/02
摘要： PROBLEM TO BE SOLVED: To improve an assembling structure of an earth leakage detecting circuit module so as to manufacture highly reliable products at low cost and high productivity. SOLUTION: In the earth leakage detecting circuit module, printed boards 11 and 12 of a power supply circuit and a control circuit are arranged in upper and lower stages, they are combined with a varistor (insert component) 13 stored in a printed board case 14, a connecting conductor is connected to each printed board with a pin 18, and its periphery is sealed with a sealing resin 15. The printed board case is provided with positioning pins 14b, respective printed boards of the power supply circuit and control circuit are inserted into the positioning pins and assembled at high positioning accuracy, and a reference pin 14c for positioning the printed board case at a reference position in a module assembling process, and a degassing hole 14d opening in the bottom surface of the case so as to exhaust gas occurring in a resin sealing process are provided.

3. 发明专利

JP2002093300A CIRCUIT BREAKER 失效
公开(公告)号：JP2002093300A
公开(公告)日：2002-03-29
申请号：JP2000279771
申请日：2000-09-14
申请人： FUJI ELECTRIC CO LTD
发明人： AOKI TADAHISA , SATO KAZUHIKO , HASEGAWA KIYOSHI , KAWASHIMA YOSHIAKI , OGASAWARA MAKOTO
IPC分类号： H01H73/02 , H01H73/06
摘要： PROBLEM TO BE SOLVED: To secure safety of attachment/detachment works of an attachment in a circuit breaker attaching/detaching the attachment by opening an attachment cover provided in a cover. SOLUTION: The attachment cover 4 is provided in a power supply side of an operation handle 3 projecting from the cover 2 and a fastening screw 6 of the attachment cover 4 is provided in a position concealed by the operation handle 3 in the turned-on position. When the circuit breaker is turned on, even if the fastening screw 6 is loosened by a screwdriver, the attachment cover 4 is prevented from being opened and the operation handle 3 must be tipped or turned off to open the attachment cover 4. This constitution can avoid the risk of attaching/detaching the attachment with the circuit breaker turned on.

4. 发明专利

JP2001300678A EXTRUDING METHOD OF COLUMNAR PROJECTION 失效
公开(公告)号：JP2001300678A
公开(公告)日：2001-10-30
申请号：JP2000114978
申请日：2000-04-17
申请人： FUJI ELECTRIC CO LTD
发明人： SATO KAZUHIKO , KAWASHIMA YOSHIAKI , OGASAWARA MAKOTO , AOKI TADAHISA , HASEGAWA KIYOSHI
IPC分类号： B21J5/02 , B21K21/12
摘要： PROBLEM TO BE SOLVED: To prevent a large roundness R on a corner portion of an end face of a columnar projection in the case of extruding the columnar projection in a metal plate. SOLUTION: A conical recess 5 is formed on a short side of the columnar projection 3, the recess 5 is simultaneously formed in the case of extruding the columnar projection 3, and a material at the portion is shifted to the corner portion of the end face of the columnar projection 3. The material at the end face is forcibly shifted to the corner portion simultaneously in the case of forming the columnar projection 3, and the corner is expanded to reduce the roundness.

5. 发明专利

JP2000003660A EARTH LEAKAGE BREAKER 失效
公开(公告)号：JP2000003660A
公开(公告)日：2000-01-07
申请号：JP16656998
申请日：1998-06-15
申请人： FUJI ELECTRIC CO LTD
发明人： KAWASHIMA YOSHIAKI , SATO KAZUHIKO , HASEGAWA KIYOSHI , AOKI TADAHISA , OGASAWARA MAKOTO
IPC分类号： H01H83/04
摘要： PROBLEM TO BE SOLVED: To lessen the number of components and save space, by doing away with connect lead wires among a residual current transformer, a test switch and a printed wiring board, and simplifying the test switch. SOLUTION: A case 1 is mounted with a main circuit contact, a switch mechanism, a residual current transformer 7, a trip coil unit with a ground-fault indicating button, a printed wiring board 10 mounted with a ground-fault detecting circuit and a test circuit, and a push-button type test switch 13 connected to the test circuit. Here, the printed wiring board 10 is put on the residual current transformer 7 wound with a test winding 7a and integrated with terminals, and it is arranged opposite to a case cover. At the same time, output pin terminals 7b and test pin terminals 7c of the residual current transformer 7 are lead out of the upper surface of the printed wiring board 10. Further, one test pin terminal 7c-1 of the test winding is used as a fixed contact of the test switch 13, then a movable contact 13b opposed to it is mounted to the push button 13a, to constitute the test switch 13.

6. 发明专利

JPH11135000A EARTH LEAKAGE BREAKER 失效
公开(公告)号：JPH11135000A
公开(公告)日：1999-05-21
申请号：JP29990497
申请日：1997-10-31
申请人： FUJI ELECTRIC CO LTD
发明人： KAWASHIMA YOSHIAKI , SATO KAZUHIKO , HASEGAWA KIYOSHI , AOKI TADAHISA , OGASAWARA MAKOTO
IPC分类号： H02H3/16 , H01H83/02 , H01H83/04 , H02H3/347
摘要： PROBLEM TO BE SOLVED: To prevent an electric current limiting resistor from burning at the time of testing even in the case a load side and an electric power side are erroneously connected. SOLUTION: This earth leakage breaker is constituted so as to shut a main circuit switch 4 by detecting zero phase current of the main circuit by a zero phase current transformer 8 and supplying excitation electric current to a trigger coil 43 when a printed circuit, as an electron circuit, judges flow of leakage current in the case the detected zero phase current exceeds a prescribed value. The earth leakage breaker comprises a test circuit 7 to which voltage is applied from the main circuit and which comprises an electric current limiting resistor 72 and a test switch 71 connected in series and is installed as to cross the iron core of the zero phase current transformer 8. In this case, a protection switch 73 is installed in the test circuit 7 and the test electric current started flowing by turning on the test switch 71 at the time of testing is shut by the protection switch 73 and flows only for a slightest time by making the protection switch 73 be turned on or off interlockingly with the main circuit switch 4.

7. 发明专利

JPH10269921A ON/OFF DISPLAY STRUCTURE OF CIRCUIT BREAKER 失效
公开(公告)号：JPH10269921A
公开(公告)日：1998-10-09
申请号：JP6716097
申请日：1997-03-21
申请人： FUJI ELECTRIC CO LTD
发明人： OGASAWARA MAKOTO , SATO KAZUHIKO , HASEGAWA KIYOSHI , KAWASHIMA YOSHIAKI , AOKI TADAHISA
IPC分类号： H01H71/04 , H01H73/12
摘要： PROBLEM TO BE SOLVED: To display operation state to a handle with good workability and prevent dust or the like from invading within a case by disposing a display plate on which circuit operation state is displayed between an arc face of the handle and a cover and closing a gap between the arc face of the handle and the cover by the display plate. SOLUTION: A handle 12 has a grip and an arc face 13a protruded from a handle base part, and a display plate 1 has a rectangular hole fitted with the grip integrated with the handle base part 13 and is loaded on the arc face 13a. The handle 12 loading the display plate 1 is disposed in a cover of a circuit breaker. The display plate 1 moves a guide groove between the arc face 13a of the handle 12 and a cover 16 by ON/OFF operation of the handle. A gap P between the cover 16 and the handle 12 is closed by the display plate 1, thereby preventing dust or the like from invading a case 17 from the gap P.

8. 发明专利

JPH09147729A LEAKAGE ALARM DEVICE OF EARTH LEAKAGE BREAKER 失效
公开(公告)号：JPH09147729A
公开(公告)日：1997-06-06
申请号：JP32646895
申请日：1995-11-21
申请人： FUJI ELECTRIC CO LTD
发明人： HASEGAWA KIYOSHI
IPC分类号： H01H71/04 , H01H83/02
摘要： PROBLEM TO BE SOLVED: To provide stable alarm signals and to simplify installation and constitution by detecting using a light projecting element and a light interrupting element that a leakage indicating button is projecting, and transmitting a leakage signal from a photoelectric switch. SOLUTION: A light projecting element 10 and a light interrupting element 11 have their respective optical axes made to pass through the center of a leakage indicating button 2, and light-transmitting holes 13 are bored in two parts of a light-blocking wall 7a along the optical axes. Round holes are bored in a printed substrate and in the upper wall of a case 6 in such a way as to face the button 2, and a lid plate 14 is mounted in the round hole in the case 6. The button 2 is always held in a predetermined position, and the light from the light projection ion element 10 is received by the light interrupting element 11 through the light transmitting walls 13, with not leakage signal produced. During leakage breaking, the button 2 is projecting, and the light from the light projector 10 is blocked and does not impinge on the light interrupting element 11, so a leakage signal is transmitted from an output wire. Since the inside of a housing is matte black and the periphery of the button 2 is covered with the light-blocking wall 7a, the light does not go around them as the result of irregular reflections.

9. 发明专利

JPH0583107A PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPH0583107A
公开(公告)日：1993-04-02
申请号：JP23844991
申请日：1991-09-19
申请人： FUJI ELECTRIC CO LTD
发明人： HASEGAWA KIYOSHI
IPC分类号： H03K17/78
摘要： PURPOSE:To prevent malfunction caused when some photoelectric switches are fitted closely together by adopting a random square wave pulse circuit outputting a square wave pulse at a random period for a square wave pulse circuit. CONSTITUTION:A light emitting device 21 consists of a square wave pulse circuit 19 outputting a square wave pulse and a light emitting circuit 20 connecting to the square wave pulse circuit and emitting an optical pulse for an output period of the square wave pulse circuit and a light receiving device 22 is made up of a light receiving circuit connecting to the square wave pulse circuit and receiving a light only for an output period of the square wave pulse circuit. A random period square wave pulse circuit outputting a square wave pulse at a random period is adopted for the square wave pulse circuit 19. Thus, the light emitting period of the light emitting device 21 and a light receiving period of the light receiving device 22 are synchronized and even when some photoelectric switches are fitted closely or side by side and the light emitted from each photoelectric switch is made incident in the other photoelectric switch, the light emitting and receiving period of the photoelectric switch is made at random.

10. 发明专利

JPS61198916A PHOTODETECTING LEVEL DISPLAY DEVICE OF PHOTOELECTRIC SWITCH 失效
公开(公告)号：JPS61198916A
公开(公告)日：1986-09-03
申请号：JP3739585
申请日：1985-02-28
申请人： FUJI ELECTRIC CO LTD , HOKUYO AUTOMATIC CO
发明人： TANIGAWA KIYOSHI , HASEGAWA KIYOSHI , KOBASHI RIKIYA , MIYAUCHI TADANORI
IPC分类号： G01J1/00 , G01R31/26 , H03K17/78
摘要： PURPOSE:To attain circuit integration of the titled device by using a flip-flop reset by a separate pulse from a projected pulse so as to store and display the photodetection level. CONSTITUTION:The period of a pulse generating circuit 22 is decided by a capacitor 23. Flip-flops (FFs) 25-27 are set/reset type FFs and reset periodically by an output of the pulse generating circuit 22 to store a photodetecting signal (outputs of comparators 6, 7, 8) during the period. FFs 35-37 are D FFs and store the storage content of the FFs 25-27 by using the next output of the pulse generating circuit 22 and its output is a detection output of a photoelectric switch. When the photodetection level is stable sufficiently, an LED 21 is displayed.

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