WO2013073103A1 - Earth-leakage circuit breaker - Google Patents
Earth-leakage circuit breaker Download PDFInfo
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- WO2013073103A1 WO2013073103A1 PCT/JP2012/006583 JP2012006583W WO2013073103A1 WO 2013073103 A1 WO2013073103 A1 WO 2013073103A1 JP 2012006583 W JP2012006583 W JP 2012006583W WO 2013073103 A1 WO2013073103 A1 WO 2013073103A1
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- circuit board
- printed circuit
- leakage
- earth
- contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
- H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
Definitions
- the present invention relates to an earth leakage breaker provided with an earth leakage test circuit.
- the earth leakage breaker of Patent Document 1 includes a main circuit contact, a contact switching mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage trip device, an arc extinguishing device, an earth leakage detection circuit, and a case main body. It houses a printed circuit board on which circuit components of the leakage test circuit are mounted, a push button type test switch connected to the leakage test circuit, and the like.
- FIG. 7 shows the structure around the pushbutton test switch of the earth leakage circuit breaker described in Patent Document 1, and a printed circuit board 2 is placed on the top of the zero-phase current transformer 1.
- a cover 3 of the case main body is arranged on the upper part of the case.
- An earth leakage trip device 4 is arranged in parallel to the zero-phase current transformer 1 while being located at the bottom of the printed circuit board 2.
- a pair of test pin terminals of the zero-phase current transformer 1 protrude from the upper surface of the printed circuit board 2, and these pair of test pin terminals are fixed contacts 6 a and 6 b of the pair of test switches 5.
- the cover 3 is provided with a push button 8 of the test switch 5 that is movable downward and retracted upward by the return spring 7.
- a movable contact 9 that bridges the pair of fixed contacts 6a and 6b by movement is fixed.
- an object of the present invention is to provide a leakage breaker capable of improving the insulating performance of a printed circuit board by preventing contact with arc gas.
- an earth leakage breaker includes a main circuit contact, a contact opening / closing mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage A printed circuit board on which circuit components of a removal device, an arc extinguishing device, a leakage detection circuit and a leakage test circuit are mounted, and a push button type test switch connected to the leakage test circuit are incorporated, and the printed circuit board is arranged inside.
- the internal unit is configured to shield the contact between the arc gas generated in the arc extinguishing device and stored in the case with the printed circuit board. According to the earth leakage breaker according to this embodiment, soot contained in the arc gas generated by the arc extinguishing device does not adhere to the circuit of the printed circuit board.
- the earth leakage breaker includes a unit case in which the internal unit covers one surface side of the printed circuit board and opens on the other surface side of the printed circuit board.
- a unit cover that detachably engages with an opening edge of the unit case and closes the inside of the unit, and the push button type test switch is provided on the other surface of the printed circuit board disposed in the unit case.
- a fixed contact and a movable contact provided on a push button disposed on the unit cover and movable toward the fixed contact by a pressing operation of the push button are provided.
- the button-type test switch is configured by the printed circuit board and the internal unit that accommodates the printed circuit board, the test switch can be downsized.
- a pair of the fixed contacts are provided apart from each other on the other surface of the printed circuit board, and the movable contact of the push button A tip is provided so as to bridge between the pair of fixed contacts. According to the earth leakage circuit breaker according to this embodiment, a large insulation distance can be ensured even for a small internal unit having a small facing distance between the printed circuit board and the unit cover.
- the movable contact that bridges between the pair of fixed contacts is a conductive plate that is elastically deformable. According to the earth leakage breaker according to this embodiment, even if the push button is pushed in with a strong force, the movable contact that contacts the pair of fixed contacts bends while being elastically deformed, and excessive stress is applied to the pair of fixed contacts. Don't join.
- the internal unit in which the printed circuit board is disposed is housed in the case, and the contact between the arc gas generated by the arc extinguishing device and the printed circuit board is shielded by the internal unit. Therefore, soot contained in the arc gas generated by the arc extinguishing apparatus does not adhere to the circuit of the printed circuit board, and the insulating performance of the printed circuit board can be improved.
- FIG. 1 is a cross-sectional view of an essential part showing an earth leakage breaker according to an embodiment of the present invention
- FIG. 2 is a circuit diagram of the earth leakage breaker according to an embodiment
- FIG. 4 is a figure which shows the state which removed the unit cover of the unit accommodated in the main body case.
- the earth leakage breaker of the present embodiment includes a main circuit terminal 13 on the power source side, a main circuit terminal 14 on the load side, and a main circuit in a main body case 12 including a base 10 and a cover 11.
- a fixed contact 15 and a movable contact 16 constituting the contact an operation handle 17 connected to an opening / closing mechanism (not shown), and a contact point between the fixed contact 15 and the movable contact 16 at the time of a blocking operation by the opening / closing mechanism.
- An arc extinguishing device 18 that extinguishes the generated arc, a zero-phase current transformer 19, an overcurrent tripping device 20 (see FIG. 2), and an earth leakage tripping device 21 are incorporated.
- the leakage test circuit 24 mounted on the printed circuit board 22 includes a test switch 25 and a current limiting resistor 26. It has.
- the test switch 25 of FIG. 2 includes a pair of fixed contacts 27a and 27b and a movable contact 28 that bridges the pair of contacts 27a and 27b by moving the push button 35.
- an internal unit 29 formed of an insulating material such as a synthetic resin material is accommodated in the upper portion of the zero-phase current transformer 19 inside the main body case 12.
- the internal unit 29 includes a unit case 30 that holds the printed circuit board 22 and a unit cover 31 that is detachably engaged with the opening edge of the unit case 30 while facing the upper surface of the printed circuit board 22. Has been.
- the unit case 30 includes side partition walls 30a to 30e formed around the periphery of the printed circuit board 22, and a side partition wall 30c so that only the upper part is opened as shown in FIG.
- the bottom partition walls 30f to 30h are formed integrally with the lower part of 30 to 30e, and the printed circuit board 22 is in contact with and supported by the upper part of the bottom partition wall 30f.
- a pair of pin terminals drawn out from the zero-phase current transformer 19 protrude toward the unit cover 31 with a predetermined interval.
- the pair of pin terminals are a pair of fixed contacts 27a and 27b that constitute the test switch 25 described above.
- the button cover 31 a is formed at a position corresponding to the button insertion hole 11 a formed in the cover 11 in the unit cover 31 engaged with the opening edge of the unit case 30.
- the button holding portion 31a is a cylindrical portion that communicates vertically, and the push button 35 constituting the test switch 25 is directed toward the printed circuit board 22 in the button insertion hole 11a of the button holding portion 31a and the cover 11. It is mounted so that it can move.
- An elastically deformable conductive plate facing the pair of fixed contacts 27a and 27b of the printed circuit board 22 is fixed to the end of the push button 35 protruding from the lower opening of the button holding portion 31a.
- the plate is the movable contact 28 constituting the test switch 25 described above.
- the push button 35 attached to the button holding portion 31a and the button insertion hole 11a includes the first coil spring 32 disposed between the movable contact 28 and the unit cover 31 having the same coil axis direction, and the unit cover 31. And the second coil spring 33 disposed between the push buttons 35 is urged in a direction away from the pair of fixed contacts 27a and 27b by the spring force of the second coil spring 33. It is held in contact with the lower surface of 31.
- the distance (insulation distance) between the movable contact 28 in the standby state and the pair of fixed contacts 27a and 27b is set to H1 and H2.
- the case according to the present invention corresponds to the main body case 12.
- an earth leakage simulation current flows through the zero-phase current transformer 19, the earth leakage trip device 21 is activated by the secondary output of the zero-phase current transformer 19, and the earth leakage breaker is tripped to operate the main circuit contactor.
- the stationary contact 15 and the movable contact 16 are opened.
- the movable contact 28 that contacts the pair of fixed contacts 27a and 27b bends while being elastically deformed, so that excessive stress is applied to the pair of fixed contacts 27a and 27b. Don't join.
- the effect of the earth leakage breaker of this embodiment is demonstrated.
- the printed circuit board 22 is housed in the main body case 12 in a state of being sealed in the internal unit 29, so that the soot contained in the arc gas generated by the arc extinguishing device 18 is printed. It does not adhere to the circuit of the substrate 22. Therefore, the insulation performance of the printed circuit board can be improved.
- the test switch 25 of the leakage test circuit 24 is provided with a pair of fixed contacts 27 a and 27 b on the printed circuit board 22, and the movable contact 28 is provided on the unit cover 31 side of the internal unit 29 that accommodates the printed circuit board 22. Since the structure is provided, the test switch 25 can be downsized.
- the pair of fixed contacts 27a and 27b of the printed circuit board 22 are provided with the insulating distances H1 and H2 between the movable contact 28 provided on the unit cover 31 side, the printed circuit board 22 and Even a small internal unit 29 having a small facing distance to the unit cover 31 can ensure a large insulation distance of H1 + H2. Furthermore, even if the push button 35 is pushed in with a strong force, the movable contact 28 that contacts the pair of fixed contacts 27a and 27b bends while being elastically deformed, and an excessive stress is not applied to the pair of fixed contacts 27a and 27b. The durability of the test switch 25 can be improved.
- the leakage breaker according to the present invention is useful for improving the insulation performance of the printed circuit board by preventing contact with the arc gas.
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Abstract
This earth-leakage circuit breaker is constructed by installing, inside a case (12), main circuit contacts, a contact opening/closing mechanism, a zero-phase current transformer (19) which is provided on the main circuit in an intervening manner, an earth-leakage tripping unit (21), an arc-extinguishing unit (18), a printed board (22) on which circuit components for an earth-leakage detection circuit and an earth-leakage test circuit are mounted, and a pushbutton-type test switch (25) which is connected to the earth-leakage test circuit. Additionally, an internal unit (29) that internally contains the printed board (22) is housed inside the case (12), and an arc gas generated by the arc-extinguishing unit (18) is prevented by the internal unit (29) from coming into contact with the printed board (22).
Description
本発明は、漏電テスト回路を備えた漏電遮断器に関する。
The present invention relates to an earth leakage breaker provided with an earth leakage test circuit.
漏電遮断器として、例えば特許文献1の装置が知られている。
この特許文献1の漏電遮断器は、ケース本体内に、主回路接触子、接触子開閉機構、主回路に介装した零相変流器、漏電引外し装置、消弧装置、漏電検出回路及び漏電テスト回路の回路部品を搭載したプリント基板、漏電テスト回路に接続した押しボタン式テストスイッチなどが収納されている。 As an earth leakage breaker, for example, a device disclosed inPatent Document 1 is known.
The earth leakage breaker ofPatent Document 1 includes a main circuit contact, a contact switching mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage trip device, an arc extinguishing device, an earth leakage detection circuit, and a case main body. It houses a printed circuit board on which circuit components of the leakage test circuit are mounted, a push button type test switch connected to the leakage test circuit, and the like.
この特許文献1の漏電遮断器は、ケース本体内に、主回路接触子、接触子開閉機構、主回路に介装した零相変流器、漏電引外し装置、消弧装置、漏電検出回路及び漏電テスト回路の回路部品を搭載したプリント基板、漏電テスト回路に接続した押しボタン式テストスイッチなどが収納されている。 As an earth leakage breaker, for example, a device disclosed in
The earth leakage breaker of
図7は、特許文献1に記載した漏電遮断器の押ボタン式テストスイッチの周辺の構造を示すものであり、零相変流器1の上部にプリント基板2が載置され、このプリント基板2の上部にケース本体のカバー3が配置されている。また、プリント基板2の下部に位置しながら零相変流器1に対して並列に、漏電引外し装置4が配置されている。
FIG. 7 shows the structure around the pushbutton test switch of the earth leakage circuit breaker described in Patent Document 1, and a printed circuit board 2 is placed on the top of the zero-phase current transformer 1. A cover 3 of the case main body is arranged on the upper part of the case. An earth leakage trip device 4 is arranged in parallel to the zero-phase current transformer 1 while being located at the bottom of the printed circuit board 2.
また、零相変流器1の一対のテストピン端子がプリント基板2の上面から突出しており、これら一対のテストピン端子が一対のテストスイッチ5の固定接触子6a,6bとされている。そして、カバー3に、下方に移動可能とされて復帰バネ7により上方に後退されているテストスイッチ5の押しボタン8が配置されているとともに、この押しボタン8の下端に、押しボタン8の下方移動により一対の固定接触子6a,6bを橋絡する可動接触子9が固定されている。
Also, a pair of test pin terminals of the zero-phase current transformer 1 protrude from the upper surface of the printed circuit board 2, and these pair of test pin terminals are fixed contacts 6 a and 6 b of the pair of test switches 5. The cover 3 is provided with a push button 8 of the test switch 5 that is movable downward and retracted upward by the return spring 7. A movable contact 9 that bridges the pair of fixed contacts 6a and 6b by movement is fixed.
ところで、上述した特許文献1の漏電遮断器は、主回路に地絡電流が流れて接触子開閉機構が遮断動作を行う際に発生するアークを消弧装置が消弧するが、ケース本体内のプリント基板2と消弧装置との間には消弧装置で発生したアークガスがプリント基板2に向かうのを遮蔽する遮蔽部材が存在しない。このため、消弧装置で発生したアークガスに含まれる煤等がプリント基板2の回路に付着すると、プリント基板2の絶縁性能が低下するおそれがある。
そこで、本発明は、アークガスとの接触を防止することでプリント基板の絶縁性能を向上させることができる漏電遮断器を提供することを目的としている。 By the way, although the earth-leakage current of thepatent document 1 mentioned above flows into the main circuit and the arc extinguishing device extinguishes an arc generated when the contact opening / closing mechanism performs a breaking operation, Between the printed circuit board 2 and the arc extinguishing apparatus, there is no shielding member that shields the arc gas generated by the arc extinguishing apparatus from moving toward the printed circuit board 2. For this reason, if the soot contained in the arc gas generated by the arc extinguishing device adheres to the circuit of the printed circuit board 2, the insulation performance of the printed circuit board 2 may be deteriorated.
Accordingly, an object of the present invention is to provide a leakage breaker capable of improving the insulating performance of a printed circuit board by preventing contact with arc gas.
そこで、本発明は、アークガスとの接触を防止することでプリント基板の絶縁性能を向上させることができる漏電遮断器を提供することを目的としている。 By the way, although the earth-leakage current of the
Accordingly, an object of the present invention is to provide a leakage breaker capable of improving the insulating performance of a printed circuit board by preventing contact with arc gas.
上記目的を達成するために、本発明の一の実施形態に係る漏電遮断器は、ケース内に、主回路接触子、接触子開閉機構、主回路に介装した零相変流器、漏電引外し装置、消弧装置、漏電検出回路及び漏電テスト回路の回路部品を搭載したプリント基板、及び、前記漏電テスト回路に接続した押しボタン式テストスイッチを組み込んでなり、前記プリント基板を内部に配置した内部ユニットは、前記ケース内に収納されて前記消弧装置で発生したアークガスと前記プリント基板との接触を前記内部ユニットで遮蔽するようにした。
この一の実施形態に係る漏電遮断器によると、消弧装置で発生したアークガスに含まれる煤が、プリント基板の回路に付着しない。 In order to achieve the above object, an earth leakage breaker according to an embodiment of the present invention includes a main circuit contact, a contact opening / closing mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage A printed circuit board on which circuit components of a removal device, an arc extinguishing device, a leakage detection circuit and a leakage test circuit are mounted, and a push button type test switch connected to the leakage test circuit are incorporated, and the printed circuit board is arranged inside. The internal unit is configured to shield the contact between the arc gas generated in the arc extinguishing device and stored in the case with the printed circuit board.
According to the earth leakage breaker according to this embodiment, soot contained in the arc gas generated by the arc extinguishing device does not adhere to the circuit of the printed circuit board.
この一の実施形態に係る漏電遮断器によると、消弧装置で発生したアークガスに含まれる煤が、プリント基板の回路に付着しない。 In order to achieve the above object, an earth leakage breaker according to an embodiment of the present invention includes a main circuit contact, a contact opening / closing mechanism, a zero-phase current transformer interposed in the main circuit, an earth leakage A printed circuit board on which circuit components of a removal device, an arc extinguishing device, a leakage detection circuit and a leakage test circuit are mounted, and a push button type test switch connected to the leakage test circuit are incorporated, and the printed circuit board is arranged inside. The internal unit is configured to shield the contact between the arc gas generated in the arc extinguishing device and stored in the case with the printed circuit board.
According to the earth leakage breaker according to this embodiment, soot contained in the arc gas generated by the arc extinguishing device does not adhere to the circuit of the printed circuit board.
また、本発明の一の実施形態に係る漏電遮断器は、前記内部ユニットは、前記プリント基板の一方の面側を覆い、該プリント基板の他方の面側で開口しているユニットケースと、このユニットケースの開口縁部に着脱自在に係合してユニット内を閉塞するユニットカバーとを備え、前記押しボタン式テストスイッチは、前記ユニットケースに配設した前記プリント基板の他方の面に設けた固定接触子と、前記ユニットカバーに配設した押しボタンに設けられ、この押しボタンの押圧動作により前記固定接触子に向けて移動可能な可動接触子とを備えている。
この一の実施形態に係る漏電遮断器によると、プリント基板と、これを収納する内部ユニットとでボタン式テストスイッチを構成しているので、テストスイッチの小型化を図ることができる。 The earth leakage breaker according to one embodiment of the present invention includes a unit case in which the internal unit covers one surface side of the printed circuit board and opens on the other surface side of the printed circuit board. A unit cover that detachably engages with an opening edge of the unit case and closes the inside of the unit, and the push button type test switch is provided on the other surface of the printed circuit board disposed in the unit case. A fixed contact and a movable contact provided on a push button disposed on the unit cover and movable toward the fixed contact by a pressing operation of the push button are provided.
According to the earth leakage circuit breaker according to the one embodiment, since the button-type test switch is configured by the printed circuit board and the internal unit that accommodates the printed circuit board, the test switch can be downsized.
この一の実施形態に係る漏電遮断器によると、プリント基板と、これを収納する内部ユニットとでボタン式テストスイッチを構成しているので、テストスイッチの小型化を図ることができる。 The earth leakage breaker according to one embodiment of the present invention includes a unit case in which the internal unit covers one surface side of the printed circuit board and opens on the other surface side of the printed circuit board. A unit cover that detachably engages with an opening edge of the unit case and closes the inside of the unit, and the push button type test switch is provided on the other surface of the printed circuit board disposed in the unit case. A fixed contact and a movable contact provided on a push button disposed on the unit cover and movable toward the fixed contact by a pressing operation of the push button are provided.
According to the earth leakage circuit breaker according to the one embodiment, since the button-type test switch is configured by the printed circuit board and the internal unit that accommodates the printed circuit board, the test switch can be downsized.
また、本発明の一の実施形態に係る漏電遮断器は、前記固定接触子が、前記プリント基板の他方の面に互いに離間して一対設けられており、前記可動接触子は、前記押しボタンの先端に、前記一対の固定接触子の間を橋絡するように設けられている。
この一の実施形態に係る漏電遮断器によると、プリント基板とユニットカバーとの間の対面距離が小さい小型の内部ユニットであっても、大きな絶縁距離を確保することができる。 Further, in the earth leakage breaker according to one embodiment of the present invention, a pair of the fixed contacts are provided apart from each other on the other surface of the printed circuit board, and the movable contact of the push button A tip is provided so as to bridge between the pair of fixed contacts.
According to the earth leakage circuit breaker according to this embodiment, a large insulation distance can be ensured even for a small internal unit having a small facing distance between the printed circuit board and the unit cover.
この一の実施形態に係る漏電遮断器によると、プリント基板とユニットカバーとの間の対面距離が小さい小型の内部ユニットであっても、大きな絶縁距離を確保することができる。 Further, in the earth leakage breaker according to one embodiment of the present invention, a pair of the fixed contacts are provided apart from each other on the other surface of the printed circuit board, and the movable contact of the push button A tip is provided so as to bridge between the pair of fixed contacts.
According to the earth leakage circuit breaker according to this embodiment, a large insulation distance can be ensured even for a small internal unit having a small facing distance between the printed circuit board and the unit cover.
さらに、本発明の一の実施形態に係る漏電遮断器は、前記一対の固定接触子の間を橋絡する前記可動接触子が、弾性変形自在な導電板である。
この一の実施形態に係る漏電遮断器によると、押しボタンを強い力で押し込んでも、一対の固定接触子に接触する可動接触子が弾性変形しながら撓み、一対の固定接触子に過大な応力が加わらない。 Furthermore, in the earth leakage breaker according to one embodiment of the present invention, the movable contact that bridges between the pair of fixed contacts is a conductive plate that is elastically deformable.
According to the earth leakage breaker according to this embodiment, even if the push button is pushed in with a strong force, the movable contact that contacts the pair of fixed contacts bends while being elastically deformed, and excessive stress is applied to the pair of fixed contacts. Don't join.
この一の実施形態に係る漏電遮断器によると、押しボタンを強い力で押し込んでも、一対の固定接触子に接触する可動接触子が弾性変形しながら撓み、一対の固定接触子に過大な応力が加わらない。 Furthermore, in the earth leakage breaker according to one embodiment of the present invention, the movable contact that bridges between the pair of fixed contacts is a conductive plate that is elastically deformable.
According to the earth leakage breaker according to this embodiment, even if the push button is pushed in with a strong force, the movable contact that contacts the pair of fixed contacts bends while being elastically deformed, and excessive stress is applied to the pair of fixed contacts. Don't join.
本発明に係る漏電遮断器によれば、プリント基板を内部に配置した内部ユニットをケース内に収納し、消弧装置で発生したアークガスと前記プリント基板との接触を内部ユニットで遮蔽するようにしたので、消弧装置で発生したアークガスに含まれる煤が、プリント基板の回路に付着せず、プリント基板の絶縁性能を向上させることができる。
According to the leakage breaker according to the present invention, the internal unit in which the printed circuit board is disposed is housed in the case, and the contact between the arc gas generated by the arc extinguishing device and the printed circuit board is shielded by the internal unit. Therefore, soot contained in the arc gas generated by the arc extinguishing apparatus does not adhere to the circuit of the printed circuit board, and the insulating performance of the printed circuit board can be improved.
以下、本発明を実施するための形態(以下、実施形態という。)を、図面を参照しながら詳細に説明する。
図1は、本発明に係る一実施形態の漏電遮断器を示す要部断面図であり、図2は、一実施形態の漏電遮断器の回路図であり、図3は、本体ケースのカバーを外した漏電遮断器の内部を示す斜視図、図4は、本体ケースに収納したされたユニットのユニットカバーを外した状態を示す図である。 DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part showing an earth leakage breaker according to an embodiment of the present invention, FIG. 2 is a circuit diagram of the earth leakage breaker according to an embodiment, and FIG. The perspective view which shows the inside of the removed earth-leakage circuit breaker, FIG. 4 is a figure which shows the state which removed the unit cover of the unit accommodated in the main body case.
図1は、本発明に係る一実施形態の漏電遮断器を示す要部断面図であり、図2は、一実施形態の漏電遮断器の回路図であり、図3は、本体ケースのカバーを外した漏電遮断器の内部を示す斜視図、図4は、本体ケースに収納したされたユニットのユニットカバーを外した状態を示す図である。 DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part showing an earth leakage breaker according to an embodiment of the present invention, FIG. 2 is a circuit diagram of the earth leakage breaker according to an embodiment, and FIG. The perspective view which shows the inside of the removed earth-leakage circuit breaker, FIG. 4 is a figure which shows the state which removed the unit cover of the unit accommodated in the main body case.
本実施形態の漏電遮断器は、図1に示すように、ベース10とカバー11とからなる本体ケース12内に、電源側の主回路端子13と、負荷側の主回路端子14と、主回路接触子を構成する固定接触子15及び可動接触子16と、開閉機構(図示せず)に連結した操作ハンドル17と、開閉機構による遮断動作時に固定接触子15及び可動接触子16の接点間に発生するアークを消弧する消弧装置18と、零相変流器19と、過電流引外し装置20(図2参照)と、漏電引外し装置21とが組み込まれている。
As shown in FIG. 1, the earth leakage breaker of the present embodiment includes a main circuit terminal 13 on the power source side, a main circuit terminal 14 on the load side, and a main circuit in a main body case 12 including a base 10 and a cover 11. A fixed contact 15 and a movable contact 16 constituting the contact, an operation handle 17 connected to an opening / closing mechanism (not shown), and a contact point between the fixed contact 15 and the movable contact 16 at the time of a blocking operation by the opening / closing mechanism. An arc extinguishing device 18 that extinguishes the generated arc, a zero-phase current transformer 19, an overcurrent tripping device 20 (see FIG. 2), and an earth leakage tripping device 21 are incorporated.
また、図2の符号22は、漏電検出回路23及び漏電テスト回路24の回路部品を搭載したプリント基板であり、このプリント基板22に搭載した漏電テスト回路24は、テストスイッチ25及び限流抵抗26を備えている。
図2のテストスイッチ25は、一対の固定接触子27a,27bと、押しボタン35の可動により一対の接触子27a,27bを橋絡する可動接触子28とを備えている。 2 is a printed circuit board on which circuit components of theleakage detection circuit 23 and the leakage test circuit 24 are mounted. The leakage test circuit 24 mounted on the printed circuit board 22 includes a test switch 25 and a current limiting resistor 26. It has.
Thetest switch 25 of FIG. 2 includes a pair of fixed contacts 27a and 27b and a movable contact 28 that bridges the pair of contacts 27a and 27b by moving the push button 35.
図2のテストスイッチ25は、一対の固定接触子27a,27bと、押しボタン35の可動により一対の接触子27a,27bを橋絡する可動接触子28とを備えている。 2 is a printed circuit board on which circuit components of the
The
ここで、図3に示すように、本体ケース12の内部の零相変流器19の上部には、合成樹脂材料等の絶縁物で形成した内部ユニット29が収納されている。
この内部ユニット29は、プリント基板22を保持しているユニットケース30と、プリント基板22の上面に対向しながらユニットケース30の開口縁部に着脱自在に係合しているユニットカバー31とで構成されている。 Here, as shown in FIG. 3, aninternal unit 29 formed of an insulating material such as a synthetic resin material is accommodated in the upper portion of the zero-phase current transformer 19 inside the main body case 12.
Theinternal unit 29 includes a unit case 30 that holds the printed circuit board 22 and a unit cover 31 that is detachably engaged with the opening edge of the unit case 30 while facing the upper surface of the printed circuit board 22. Has been.
この内部ユニット29は、プリント基板22を保持しているユニットケース30と、プリント基板22の上面に対向しながらユニットケース30の開口縁部に着脱自在に係合しているユニットカバー31とで構成されている。 Here, as shown in FIG. 3, an
The
ユニットケース30は、図4に示すように、プリント基板22の周縁部を囲んで形成された側部隔壁30a~30eと、図5に示すように、上部のみが開口するように側部隔壁30c~30eの下部に一体形成された底部隔壁30f~30hとで構成され、底部隔壁30fの上部にプリント基板22が当接して支持されている。
図5に示すように、プリント基板22の上面には、零相変流器19から引き出された一対のピン端子が所定間隔をあけてユニットカバー31に向けて突出している。これら一対のピン端子が、前述したテストスイッチ25を構成する一対の固定接触子27a,27bである。 As shown in FIG. 4, theunit case 30 includes side partition walls 30a to 30e formed around the periphery of the printed circuit board 22, and a side partition wall 30c so that only the upper part is opened as shown in FIG. The bottom partition walls 30f to 30h are formed integrally with the lower part of 30 to 30e, and the printed circuit board 22 is in contact with and supported by the upper part of the bottom partition wall 30f.
As shown in FIG. 5, on the upper surface of the printedcircuit board 22, a pair of pin terminals drawn out from the zero-phase current transformer 19 protrude toward the unit cover 31 with a predetermined interval. The pair of pin terminals are a pair of fixed contacts 27a and 27b that constitute the test switch 25 described above.
図5に示すように、プリント基板22の上面には、零相変流器19から引き出された一対のピン端子が所定間隔をあけてユニットカバー31に向けて突出している。これら一対のピン端子が、前述したテストスイッチ25を構成する一対の固定接触子27a,27bである。 As shown in FIG. 4, the
As shown in FIG. 5, on the upper surface of the printed
図5に示すように、ユニットケース30の開口縁部に係合しているユニットカバー31には、カバー11に形成したボタン挿通穴11aに対応する位置にボタン保持部31aが形成されている。ボタン保持部31aは、上下に連通した筒状の部位であり、このボタン保持部31a及びカバー11のボタン挿通穴11aに、前述したテストスイッチ25を構成する押しボタン35がプリント基板22に向けて移動可能に装着されている。
ボタン保持部31aの下部開口部から突出している押しボタン35の端部には、プリント基板22の一対の固定接触子27a,27bに対向する弾性変形自在な導電板が固定されており、この導電板が、前述したテストスイッチ25を構成する可動接触子28である。 As shown in FIG. 5, thebutton cover 31 a is formed at a position corresponding to the button insertion hole 11 a formed in the cover 11 in the unit cover 31 engaged with the opening edge of the unit case 30. The button holding portion 31a is a cylindrical portion that communicates vertically, and the push button 35 constituting the test switch 25 is directed toward the printed circuit board 22 in the button insertion hole 11a of the button holding portion 31a and the cover 11. It is mounted so that it can move.
An elastically deformable conductive plate facing the pair of fixed contacts 27a and 27b of the printed circuit board 22 is fixed to the end of the push button 35 protruding from the lower opening of the button holding portion 31a. The plate is the movable contact 28 constituting the test switch 25 described above.
ボタン保持部31aの下部開口部から突出している押しボタン35の端部には、プリント基板22の一対の固定接触子27a,27bに対向する弾性変形自在な導電板が固定されており、この導電板が、前述したテストスイッチ25を構成する可動接触子28である。 As shown in FIG. 5, the
An elastically deformable conductive plate facing the pair of
そして、ボタン保持部31a及びボタン挿通穴11aに装着された押しボタン35が、互いにコイル軸方向が一致した可動接触子28及びユニットカバー31の間に配置された第1コイルバネ32と、ユニットカバー31及び押しボタン35の間に配置された第2コイルバネ33とのバネ力により一対の固定接触子27a,27bから離間した方向に付勢されているので、待機位置の可動接触子28は、ユニットカバー31の下面に当接した状態で保持されている。
この待機状態の可動接触子28と一対の固定接触子27a,27bの間の距離(絶縁距離)は、H1,H2に設定されている。
なお、本発明に係るケースが本体ケース12に対応している。 Thepush button 35 attached to the button holding portion 31a and the button insertion hole 11a includes the first coil spring 32 disposed between the movable contact 28 and the unit cover 31 having the same coil axis direction, and the unit cover 31. And the second coil spring 33 disposed between the push buttons 35 is urged in a direction away from the pair of fixed contacts 27a and 27b by the spring force of the second coil spring 33. It is held in contact with the lower surface of 31.
The distance (insulation distance) between themovable contact 28 in the standby state and the pair of fixed contacts 27a and 27b is set to H1 and H2.
The case according to the present invention corresponds to themain body case 12.
この待機状態の可動接触子28と一対の固定接触子27a,27bの間の距離(絶縁距離)は、H1,H2に設定されている。
なお、本発明に係るケースが本体ケース12に対応している。 The
The distance (insulation distance) between the
The case according to the present invention corresponds to the
次に、本実施形態の漏電遮断器の動作について説明する。
漏電テストの際に、第1コイルバネ32及び第2コイルバネ33のバネ力に抗して押しボタン35を押し込むと、図6に示すように、押しボタン35と一緒に可動接触子28が下方に移動し、一対の固定接触子27a,27bの間を橋絡して図2で示した漏電テスト回路24を通電状態にする。 Next, operation | movement of the earth-leakage circuit breaker of this embodiment is demonstrated.
When thepush button 35 is pushed against the spring force of the first coil spring 32 and the second coil spring 33 during the leakage test, the movable contact 28 moves downward together with the push button 35 as shown in FIG. Then, the leakage test circuit 24 shown in FIG. 2 is brought into an energized state by bridging between the pair of fixed contacts 27a and 27b.
漏電テストの際に、第1コイルバネ32及び第2コイルバネ33のバネ力に抗して押しボタン35を押し込むと、図6に示すように、押しボタン35と一緒に可動接触子28が下方に移動し、一対の固定接触子27a,27bの間を橋絡して図2で示した漏電テスト回路24を通電状態にする。 Next, operation | movement of the earth-leakage circuit breaker of this embodiment is demonstrated.
When the
これにより、零相変流器19に漏電模擬電流が流れ、それに伴う零相変流器19の二次出力で漏電引外し装置21が作動し、漏電遮断器をトリップ動作して主回路接触子の固定接触子15及び可動接触子16が開極する。
ここで、押しボタン35を強い力で押し込んでも、一対の固定接触子27a,27bに接触する可動接触子28が弾性変形しながら撓むので、一対の固定接触子27a,27bに過大な応力が加わらない。 As a result, an earth leakage simulation current flows through the zero-phasecurrent transformer 19, the earth leakage trip device 21 is activated by the secondary output of the zero-phase current transformer 19, and the earth leakage breaker is tripped to operate the main circuit contactor. The stationary contact 15 and the movable contact 16 are opened.
Here, even if thepush button 35 is pushed in with a strong force, the movable contact 28 that contacts the pair of fixed contacts 27a and 27b bends while being elastically deformed, so that excessive stress is applied to the pair of fixed contacts 27a and 27b. Don't join.
ここで、押しボタン35を強い力で押し込んでも、一対の固定接触子27a,27bに接触する可動接触子28が弾性変形しながら撓むので、一対の固定接触子27a,27bに過大な応力が加わらない。 As a result, an earth leakage simulation current flows through the zero-phase
Here, even if the
また、電源側の主回路端子13及び負荷側の主回路端子14の間に短絡電流、又は過負荷電流の過電流が流れると、固定接触子15及び可動接触子16が開極すると同時に、固定接触子15及び可動接触子16の接点間にアークが発生する。このアークは消弧装置18のグリッドに接触して分断、冷却され、早期に消弧されるようになる。
ここで、本体ケース12の内部に配置されているプリント基板22は、ユニットケース30及びユニットカバー31からなる内部ユニット29に密閉された状態で収納されているので、消弧装置18で発生したアークガスとは接触しない。 Also, when a short circuit current or an overload current flows between themain circuit terminal 13 on the power source side and the main circuit terminal 14 on the load side, the fixed contact 15 and the movable contact 16 are opened simultaneously and fixed. An arc is generated between the contact points of the contact 15 and the movable contact 16. This arc comes into contact with the grid of the arc extinguishing device 18 and is divided and cooled, so that the arc is extinguished early.
Here, since the printedcircuit board 22 arranged inside the main body case 12 is stored in a sealed state in an internal unit 29 including a unit case 30 and a unit cover 31, arc gas generated by the arc extinguishing device 18 is stored. Do not touch.
ここで、本体ケース12の内部に配置されているプリント基板22は、ユニットケース30及びユニットカバー31からなる内部ユニット29に密閉された状態で収納されているので、消弧装置18で発生したアークガスとは接触しない。 Also, when a short circuit current or an overload current flows between the
Here, since the printed
次に、本実施形態の漏電遮断器の効果について説明する。
本実施形態の漏電遮断器は、本体ケース12の内部に、内部ユニット29に密閉された状態でプリント基板22が収納されているので、消弧装置18で発生したアークガスに含まれる煤が、プリント基板22の回路に付着しない。そのため、プリント基板の絶縁性能を向上させることができる。
また、漏電テスト回路24のテストスイッチ25は、プリント基板22に一対の固定接触子27a,27bを設け、このプリント基板22を収納している内部ユニット29のユニットカバー31側に可動接触子28を設けた構造としているので、テストスイッチ25の小型化を図ることができる。 Next, the effect of the earth leakage breaker of this embodiment is demonstrated.
In the earth leakage breaker of this embodiment, the printedcircuit board 22 is housed in the main body case 12 in a state of being sealed in the internal unit 29, so that the soot contained in the arc gas generated by the arc extinguishing device 18 is printed. It does not adhere to the circuit of the substrate 22. Therefore, the insulation performance of the printed circuit board can be improved.
In addition, thetest switch 25 of the leakage test circuit 24 is provided with a pair of fixed contacts 27 a and 27 b on the printed circuit board 22, and the movable contact 28 is provided on the unit cover 31 side of the internal unit 29 that accommodates the printed circuit board 22. Since the structure is provided, the test switch 25 can be downsized.
本実施形態の漏電遮断器は、本体ケース12の内部に、内部ユニット29に密閉された状態でプリント基板22が収納されているので、消弧装置18で発生したアークガスに含まれる煤が、プリント基板22の回路に付着しない。そのため、プリント基板の絶縁性能を向上させることができる。
また、漏電テスト回路24のテストスイッチ25は、プリント基板22に一対の固定接触子27a,27bを設け、このプリント基板22を収納している内部ユニット29のユニットカバー31側に可動接触子28を設けた構造としているので、テストスイッチ25の小型化を図ることができる。 Next, the effect of the earth leakage breaker of this embodiment is demonstrated.
In the earth leakage breaker of this embodiment, the printed
In addition, the
そして、ユニットカバー31側に設けた可動接触子28との間に、それぞれH1,H2の絶縁距離を設けてプリント基板22の一対の固定接触子27a,27bを設けたことから、プリント基板22とユニットカバー31との間の対面距離が小さい小型の内部ユニット29であっても、H1+H2の大きな絶縁距離を確保することができる。
さらに、押しボタン35を強い力で押し込んでも、一対の固定接触子27a,27bに接触する可動接触子28が弾性変形しながら撓み、一対の固定接触子27a,27bに過大な応力が加わらないので、テストスイッチ25の耐久性を向上させることができる。 Since the pair of fixed contacts 27a and 27b of the printed circuit board 22 are provided with the insulating distances H1 and H2 between the movable contact 28 provided on the unit cover 31 side, the printed circuit board 22 and Even a small internal unit 29 having a small facing distance to the unit cover 31 can ensure a large insulation distance of H1 + H2.
Furthermore, even if thepush button 35 is pushed in with a strong force, the movable contact 28 that contacts the pair of fixed contacts 27a and 27b bends while being elastically deformed, and an excessive stress is not applied to the pair of fixed contacts 27a and 27b. The durability of the test switch 25 can be improved.
さらに、押しボタン35を強い力で押し込んでも、一対の固定接触子27a,27bに接触する可動接触子28が弾性変形しながら撓み、一対の固定接触子27a,27bに過大な応力が加わらないので、テストスイッチ25の耐久性を向上させることができる。 Since the pair of fixed
Furthermore, even if the
以上のように、本発明に係る漏電遮断器は、アークガスとの接触を防止することでプリント基板の絶縁性能を向上させるのに有用である。
As described above, the leakage breaker according to the present invention is useful for improving the insulation performance of the printed circuit board by preventing contact with the arc gas.
10…ベース、11…カバー、11a…ボタン挿通穴、12…本体ケース、13…電源側の主回路端子、14…負荷側の主回路端子、15…固定接触子、16…可動接触子、17…操作ハンドル、18…消弧装置、19…零相変流器、20…過電流引外し装置、21…漏電引外し装置、22…プリント基板、23…漏電検出回路、24…漏電テスト回路、25…テストスイッチ、26…限流抵抗、27a,27b…固定接触子、28…可動接触子、29…内部ユニット、30…ユニットケース、30a~30e…側部隔壁、30f~30h…底部隔壁、31…ユニットカバー、31a…ボタン保持部、32…第1のコイルバネ、33…第2のコイルバネ、35…押しボタン
DESCRIPTION OF SYMBOLS 10 ... Base, 11 ... Cover, 11a ... Button insertion hole, 12 ... Main body case, 13 ... Main circuit terminal on power supply side, 14 ... Main circuit terminal on load side, 15 ... Fixed contact, 16 ... Movable contact, 17 DESCRIPTION OF SYMBOLS ... Operation handle, 18 ... Arc extinguishing device, 19 ... Zero phase current transformer, 20 ... Overcurrent tripping device, 21 ... Leakage tripping device, 22 ... Printed circuit board, 23 ... Leakage detection circuit, 24 ... Leakage test circuit, 25 ... Test switch, 26 ... Current limiting resistor, 27a, 27b ... Fixed contact, 28 ... Movable contact, 29 ... Internal unit, 30 ... Unit case, 30a-30e ... Side partition, 30f-30h ... Bottom partition, 31 ... Unit cover, 31a ... Button holding part, 32 ... First coil spring, 33 ... Second coil spring, 35 ... Push button
Claims (4)
- ケース内に、主回路接触子、接触子開閉機構、主回路に介装した零相変流器、漏電引外し装置、消弧装置、漏電検出回路及び漏電テスト回路の回路部品を搭載したプリント基板、及び、前記漏電テスト回路に接続した押しボタン式テストスイッチを組み込んでなり、
前記プリント基板を内部に配置した内部ユニットは、前記ケース内に収納されて前記消弧装置で発生したアークガスと前記プリント基板との接触を前記内部ユニットで遮蔽することを特徴とする漏電遮断器。 Printed circuit board with main circuit contacts, contact opening / closing mechanism, zero-phase current transformer, leakage trip device, arc extinguishing device, leakage detection circuit and leakage test circuit in the case And a push button type test switch connected to the leakage test circuit,
The internal circuit unit in which the printed circuit board is disposed is housed in the case and shields the contact between the arc gas generated by the arc extinguishing device and the printed circuit board by the internal unit. - 前記内部ユニットは、前記プリント基板の一方の面側を覆い、該プリント基板の他方の面側で開口しているユニットケースと、このユニットケースの開口縁部に着脱自在に係合してユニット内を閉塞するユニットカバーとを備え、
前記押しボタン式テストスイッチは、前記ユニットケースに配設した前記プリント基板の他方の面に設けた固定接触子と、前記ユニットカバーに配設した押しボタンに設けられ、この押しボタンの押圧動作により前記固定接触子に向けて移動可能な可動接触子と、を備えていることを特徴とする請求項1記載の漏電遮断器。 The internal unit covers one surface side of the printed circuit board and opens in the other surface side of the printed circuit board. And a unit cover for closing
The push button type test switch is provided on a fixed contact provided on the other surface of the printed circuit board provided on the unit case and on a push button provided on the unit cover. The earth leakage circuit breaker according to claim 1, further comprising a movable contact that is movable toward the fixed contact. - 前記固定接触子は、前記プリント基板の他方の面に互いに離間して一対設けられており、
前記可動接触子は、前記押しボタンの先端に、前記一対の固定接触子の間を橋絡するように設けられていることを特徴とする請求項2記載の漏電遮断器。 A pair of the fixed contacts are provided apart from each other on the other surface of the printed circuit board,
The earth leakage circuit breaker according to claim 2, wherein the movable contact is provided at a tip of the push button so as to bridge between the pair of fixed contacts. - 前記一対の固定接触子の間を橋絡する前記可動接触子は、弾性変形自在な導電板であることを特徴とする請求項3記載の漏電遮断器。 The earth leakage circuit breaker according to claim 3, wherein the movable contact that bridges the pair of fixed contacts is an elastically deformable conductive plate.
Priority Applications (1)
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CN201280048571.1A CN103843101B (en) | 2011-11-15 | 2012-10-15 | Residual current circuit breaker |
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JP2011-249402 | 2011-11-15 | ||
JP2011249402A JP5866993B2 (en) | 2011-11-15 | 2011-11-15 | Earth leakage breaker |
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WO2013073103A1 true WO2013073103A1 (en) | 2013-05-23 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/006583 WO2013073103A1 (en) | 2011-11-15 | 2012-10-15 | Earth-leakage circuit breaker |
Country Status (3)
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JP (1) | JP5866993B2 (en) |
CN (1) | CN103843101B (en) |
WO (1) | WO2013073103A1 (en) |
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CN105702529B (en) * | 2016-04-28 | 2018-08-28 | 德力西电气有限公司 | A kind of breaker leakage function construction of switch and the leakage circuit breakers with it |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63259937A (en) * | 1987-04-15 | 1988-10-27 | 富士電機株式会社 | Zero phase current transformer unit for leakage breaker |
JPH07240142A (en) * | 1994-02-28 | 1995-09-12 | Matsushita Electric Works Ltd | Circuit breaker |
JPH08138521A (en) * | 1994-11-15 | 1996-05-31 | Matsushita Electric Works Ltd | Earth-leakage circuit breaker |
JP2000003660A (en) * | 1998-06-15 | 2000-01-07 | Fuji Electric Co Ltd | Earth leakage breaker |
JP2000149757A (en) * | 1998-11-04 | 2000-05-30 | Fuji Electric Co Ltd | Earth leakage circuit breaker |
JP2002231119A (en) * | 2001-01-26 | 2002-08-16 | Fuji Electric Co Ltd | Earth leakage detecting circuit module for earth leakage breaker, and its manufacturing method |
JP2003132779A (en) * | 2001-10-22 | 2003-05-09 | Kawamura Electric Inc | Tracking corresponding breaker |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4893358B2 (en) * | 2007-02-19 | 2012-03-07 | 富士電機機器制御株式会社 | Earth leakage trip device for earth leakage breaker |
CN101996827B (en) * | 2009-08-28 | 2013-04-03 | 李文俊 | Leakage protection circuit breaker with arc extinguishing chamber at both poles |
-
2011
- 2011-11-15 JP JP2011249402A patent/JP5866993B2/en active Active
-
2012
- 2012-10-15 WO PCT/JP2012/006583 patent/WO2013073103A1/en active Application Filing
- 2012-10-15 CN CN201280048571.1A patent/CN103843101B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63259937A (en) * | 1987-04-15 | 1988-10-27 | 富士電機株式会社 | Zero phase current transformer unit for leakage breaker |
JPH07240142A (en) * | 1994-02-28 | 1995-09-12 | Matsushita Electric Works Ltd | Circuit breaker |
JPH08138521A (en) * | 1994-11-15 | 1996-05-31 | Matsushita Electric Works Ltd | Earth-leakage circuit breaker |
JP2000003660A (en) * | 1998-06-15 | 2000-01-07 | Fuji Electric Co Ltd | Earth leakage breaker |
JP2000149757A (en) * | 1998-11-04 | 2000-05-30 | Fuji Electric Co Ltd | Earth leakage circuit breaker |
JP2002231119A (en) * | 2001-01-26 | 2002-08-16 | Fuji Electric Co Ltd | Earth leakage detecting circuit module for earth leakage breaker, and its manufacturing method |
JP2003132779A (en) * | 2001-10-22 | 2003-05-09 | Kawamura Electric Inc | Tracking corresponding breaker |
Also Published As
Publication number | Publication date |
---|---|
CN103843101A (en) | 2014-06-04 |
CN103843101B (en) | 2016-06-08 |
JP2013105644A (en) | 2013-05-30 |
JP5866993B2 (en) | 2016-02-24 |
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