CN101978460B - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
CN101978460B
CN101978460B CN200980107393.3A CN200980107393A CN101978460B CN 101978460 B CN101978460 B CN 101978460B CN 200980107393 A CN200980107393 A CN 200980107393A CN 101978460 B CN101978460 B CN 101978460B
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CN
China
Prior art keywords
supporting arm
pivot
connecting rod
handle
movable rod
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Active
Application number
CN200980107393.3A
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Chinese (zh)
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CN101978460A (en
Inventor
水野初男
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Panasonic Electric Works Co Ltd
Matsushita Denko Denro System KK
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Matsushita Denko Denro System KK
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Publication of CN101978460A publication Critical patent/CN101978460A/en
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Publication of CN101978460B publication Critical patent/CN101978460B/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/48—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release
    • H01H73/50—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Abstract

Provided is a circuit breaker which can quicken the opening/closing speed of a contact and can maintain the performance over a long term. A circuit breaker is constituted such that when a handle is operated to turn about a second rotary shaft 9 of a supporting arm 40 from an off position toward an on position , a second interlock link 26 regulates rotation of a movable bar 30 while resisting against the urging force of a spring member 38 in order to prevent the movable bar 30 from rotating a predetermined angle or more about a first rotary shaft 46 within a predetermined angular range in rotation of the supporting arm. Furthermore, when the supporting arm 40 rotates over a predetermined angular range to the on position, the second interlock link 26 disengages from the movable bar 30 and the movable bar 30 is rotated about the first rotary shaft 46 by the urging force of the spring member 38 thus closing a movable contact 32 to a fixed contact 5.

Description

Circuit breaker
Technical field
The present invention relates to circuit breaker.
Background technology
Proposed circuit breaker is used for being connected and disconnection in response to lever operated being connected with overload current between movable contact and fixed contact.In Japanese Patent Publication document No.2637081, disclosed circuit breaker is provided with linkage unit and trip(ping) bar (trip lever), this linkage unit be used for making between lever operated and movable contact and fixed contact be connected and disconnection is associated, this trip(ping) bar is configured to lock linkage unit and locking unit is tripped in response to the overload current that detects.This circuit breaker is designed to when an end of linkage unit in the situation that make the linkage unit tripping operation when having overload current to be promoted by electromagnetic trip device or thermal tripping device, thereby movable contact is separated with fixed contact.
Be connected lentamente with fixed contact when movable contact or when disconnecting, the impact of the electric arc that circuit breaker can be subject to producing between contact, thus may damage due to the heat that electric arc produces the inside of housing.Circuit breaker in Japanese Patent Publication document No.2637081 is equipped with fast close unit, and it is used for making movable contact fast near fixed contact.Should comprise the scraper member (scratch member) that is supported on pivotally handle and be used for temporarily stopping the stop arm of the action of movable contact near the unit fast.This stop arm is provided with inclined surface, and this inclined surface is used for making scraper member to slide in response to the rotation of handle thereon.This stop arm is designed to temporarily stop the action of movable contact on inclined surface when scraper member is slided.But this circuit breaker in Japanese Patent Publication document No.2637081 all can slide on inclined surface by the handle drives scraper member in each divide-shut brake conversion, thereby scraper member and inclined surface may be worn and torn because of multiple conversions.Can cause so lever operated unstablely, and make fast and be not durable near the unit.
Summary of the invention
Consider that the problems referred to above have realized the present invention, therefore the objective of the invention is a kind of circuit breaker with the lasting translation function that makes the fast close fixed contact of movable contact.
Circuit breaker in the present invention comprises housing, handle and converting unit.Housing is provided with fixed contact and movable contact.Handle is supported on housing pivotally, with can thorny arbor pivotable between open position and off-position.Converting unit is configured to make in response to the pivot action of handle movable contact be connected with fixed contact and disconnect.Converting unit comprises: with movable rod, supporting arm, first connecting rod and second connecting rod and the spring member of movable contact.This supporting arm with the movable rod supporting thereon.First connecting rod and second connecting rod all are configured to operate in response to the action of handle this supporting arm.The movable contact of movable rod is positioned at an end of movable rod, and movable rod is supported on supporting arm at the position that is positioned at its centre, vertical two ends pivotally by the first pivot.This supporting arm is formed at its end away from handle and keeps the first pivot in order to can move together with the first pivot.Supporting arm is supported on housing at the position that is positioned at its centre, vertical two ends pivotally by the second pivot, to turn round between closing position and open position around the second pivot.Supporting arm is configured to maintain movable rod and makes movable contact keep contacting with fixed contact when being arranged in closing position.Supporting arm is configured to make movable contact to be kept away from fixed contact when being arranged in open position.First connecting rod is configured to towards the action of open position, supporting arm be rotated away from off-position in response to handle towards closing position away from open position around the second pivot.Spring member is connected in movable rod in an end relative with movable contact for the first pivot of movable rod.When supporting arm is in closing position, spring member provides and makes movable rod around the first pivot rotation and make movable contact keep the spring-biased that contacts with fixed contact, and when allowing supporting arm to locate away from closing position, spring member provides the spring-biased that supporting arm is rotated from closing position to open position around the second pivot.Second connecting rod be formed at make supporting arm in response to handle the rotation from the open position to the off-position and when the second pivot moves to closing position from open position in predetermined angular range the restriction movable rod overcome the bias voltage of spring member and can not surpass predetermined angular around the first pivot pivotable.Second connecting rod is configured to surpass the predetermined pivot angle and discharge movable rod to the closing position pivotable in response to supporting arm, thus make movable rod can be under the spring-biased of spring assembly around the first pivot along the direction pivotable that movable contact and fixed contact are kept in touch.By this structure, make this circuit breaker can obtain to make the lasting translation function of the fast close fixed contact of movable contact.
In circuit breaker of the present invention, second connecting rod is provided preferably with rod spring so that driven and discharge movable rod.This structure can be accurately positioned second connecting rod when itself and movable rod are disengaged,, thus stably operate converting unit.This rod spring can be properly controlled into has predetermined bias force, so as when second connecting rod and movable rod to be disengaged the pivoting angle of regulating handle.
Description of drawings
Fig. 1 shows the stereogram that is in the circuit breaker in gate-dividing state (off-condition) according to an execution mode, and wherein capping is pulled down from circuit breaker.
Fig. 2 shows the front view that is in the circuit breaker in gate-dividing state according to above-mentioned execution mode, and wherein capping is pulled down from circuit breaker.
Fig. 3 shows the front view that is in the circuit breaker in "on" position (on-condition) according to above-mentioned execution mode, and wherein capping is pulled down from circuit breaker.
Fig. 4 shows the front view that is in the circuit breaker in tripped condition (trip-condition) according to above-mentioned execution mode, and wherein capping is pulled down from circuit breaker.
Fig. 5 shows the front view that is fused to the circuit breaker of fixed contact according to the movable contact of above-mentioned execution mode, and wherein capping is pulled down from circuit breaker.
Fig. 6 shows the converting unit that is in the above-mentioned circuit breaker in gate-dividing state.
Fig. 7 shows the converting unit that is in the above-mentioned circuit breaker in "on" position.
Fig. 8 shows the converting unit that is in the above-mentioned circuit breaker in tripped condition.
Fig. 9 shows the converting unit that is in the above-mentioned circuit breaker in gate-dividing state, and wherein latch members is pulled down from circuit breaker.
Figure 10 shows the converting unit of the above-mentioned circuit breaker in the intermediateness that is between gate-dividing state and "on" position, and wherein latch members is pulled down from circuit breaker.
Figure 11 shows the converting unit that is in the above-mentioned circuit breaker in "on" position, and wherein latch members is pulled down from circuit breaker.
Figure 12 shows the front view of above-mentioned circuit breaker.
Figure 13 shows the left view of above-mentioned circuit breaker.
Figure 14 shows the right view of above-mentioned circuit breaker.
Figure 15 shows the vertical view of the converting unit of above-mentioned circuit breaker.
Figure 16 shows the stereogram that locator is positioned at the above-mentioned circuit breaker of top, and wherein capping is pulled down from circuit breaker.
Figure 17 shows the front view that locator is positioned at the above-mentioned circuit breaker of top, and wherein capping is pulled down from circuit breaker.
Figure 18 shows the stereogram that outer lead is connected to the above-mentioned circuit breaker of screw holder, and wherein capping is pulled down from circuit breaker.
Figure 19 shows the front view that outer lead is connected to the above-mentioned circuit breaker of screw holder, and wherein capping is pulled down from circuit breaker.
Figure 20 shows the front view of the indicating device of above-mentioned circuit breaker.
Figure 21 shows the vertical view of the indicating device of above-mentioned circuit breaker.
Figure 22 shows the right view of the indicating device of above-mentioned circuit breaker.
Figure 23 shows the exterior perspective view of the indicating device of above-mentioned circuit breaker.
Figure 24 shows the sectional view of the essential part of the indicating device that is in the above-mentioned circuit breaker in gate-dividing state.
Figure 25 shows the sectional view of the essential part of the indicating device that is in the above-mentioned circuit breaker in "on" position.
Figure 26 shows the sectional view of the essential part of the indicating device that is in the above-mentioned circuit breaker in tripped condition.
Embodiment
Below, with reference to the circuit breaker in the description of drawings present embodiment.The handle 20 that circuit breaker in present embodiment comprises housing 1, fixed contact 5, movable contact 32, made by synthetic resin, converting unit 6, tripgear (that is, electromagnetic trip device 62 and thermal tripping device 68), the indicating device 70, extinguisher 80, power supply side terminal 90A and the load side terminal 90B that are made by synthetic resin.Converting unit 6 is configured to make movable contact 32 be connected and disconnect with fixed contact 5 in response to the pivot action of handle 20 (breaking-closing operating).Tripgear be configured to when detect between movable contact 32 and fixed contact 5, abnormal current (short circuit current, overload current) is arranged thus make converting unit 6 tripping operations that movable contact 32 is separated with fixed contact 5 when flowing.Indicating device 70 is configured to indicate "on" position, gate-dividing state and tripped condition hereinafter described.Extinguisher 80 is configured to extinguish the electric arc that produces due to the connection between contact and disconnection.Power supply side terminal 90A is connected in the external power source (not shown).Load side terminal 90B is connected in the wire (not shown) such as load.Circuit breaker in present embodiment is configured to present respectively at the gate-dividing state shown in Fig. 2 to Fig. 5, "on" position, tripped condition and as-welded (welded condition) in response to the tripping operation action of the pivot action of handle 20 and converting unit 6.The circuit breaker (shown in Fig. 2) that is in gate-dividing state is constructed such that movable contact 32 is kept away from fixed contact 5, and the handle 22 of handle 20 is positioned at the left side.This circuit breaker (shown in Fig. 3) that is in "on" position is constructed such that movable contact 32 keeps contacting with fixed contact 5, and the handle 22 of handle 20 is positioned at the right side.This circuit breaker (shown in Fig. 4) that is in tripped condition makes movable contact 32 be kept away from fixed contact 5, and the handle 22 of handle 20 is positioned at the right side.In as-welded (shown in Fig. 5), movable contact 32 is fused to fixed contact 5.
Housing 1 is made of body 2 and capping 3.Handle 20 is configured to pivotally be supported in Handle axis 28, and this Handle axis 28 is arranged at body 2, and the window 2a of the upper wall of handle 22 (handle part) through being arranged at body 2 is protruding.Handle 20 is provided with the handle spring (not shown), thereby in order to is flexibly driven along the counter clockwise direction pivotable in Fig. 2.Handle 20 is configured to thorny arbor 28 pivotable between open position and off-position, and handle 22 is positioned at the left side in open position, and handle 22 is positioned at the right side in off-position.Tripgear in present embodiment comprises electromagnetic trip device 62 and thermal tripping device 68, and electromagnetic trip device 62 and thermal tripping device 68 are configured to activate individually converting unit 6 with tripping operation when abnormal current being detected.Indicating device 70 is configured such that its at least a portion exposes through discovering window 8, and this discovering window 8 is arranged at the upper surface of housing 1 (body 2).
Body 2 and capping 3 are formed by dielectric synthetic resin respectively, and roughly are configured as respectively the casing that has opening at the one surface place.Opening by making body 2 and the opening of capping 3 face with each other, in four corners of body 2 are inserted into protuberance 2d opening in the sidewall of capping 3, and the hole 3a in the opposing sidewalls of protruding 2c and capping 3 on the sidewall of body 2 is engaged, thereby body 2 is connected in capping 3.Each protuberance 2d is partly excised from the edge that capping 3 is stretched out at it.Housing 1 predetermined locations of section within it is provided with the stator 4 that is fixed in this place.Fixed contact 5 is securely attached to this stator 4.
Below, be illustrated with reference to Fig. 2 to 8 pair of converting unit 6.Show respectively handle 20 in Fig. 2 to 4 and the action of converting unit 6 in Fig. 6 to 8.Converting unit 6 comprises movable rod 30, supporting arm 40, latch members 50, first connecting rod 24, second connecting rod 26, spring member 38 and case spring 51.Movable rod 30, supporting arm 40 and latch members 50 are made by the sheet metal with predetermined thickness respectively, and form by drawing process and bending process.First connecting rod 24 becomes by the circular metal clavate with second connecting rod 26, and its opposite two ends are bent into the configuration that roughly takes the shape of the letter U.Spring member 38 and case spring 51 form by torsion coil spring, and extend along opposite direction at its relative two ends.Spring member 38 and case spring 51 are illustrated as simple and easy spring in Fig. 6 to 8, to be easy to show stretching, extension and the inconsistency of these springs.
Movable rod 30 has movable contact 32 at place, its underpart, and the position in the middle of its vertical two ends is fixed in an end of braided wire 13.Movable rod 30 is located to be supported pivotally by the first pivot 46 at an upper portion thereof, thereby can be around the first pivot 46 pivotables.The place, top that spring member 38 is provided in movable rod 30 is resisted against on spring retainer 34.Movable rod 30 is provided with retainer 36, in order to can contact second connecting rod 26.Spring retainer 34 is positioned at the end relative with movable contact 32 for the first pivot 46 of movable rod 30.
The position of supporting arm 40 in the middle of its vertical two ends supported to the second pivot 9 that is arranged at housing 1 pivotally.Supporting arm 40 is provided with the first pivot 46 at place, its underpart.By this configuration, make the supporting arm 40 can be around the second pivot 9 pivotables together with movable rod 30.The first pivot 46 is inserted in arcuate furrow 2b, thereby can move in this arcuate furrow 2b.Supporting arm 40 can be between closing position and open position pivotable, in closing position, the first pivot 46 is positioned at the left end place of the most close fixed contact 5 of groove, in open position, the first pivot 46 be positioned at groove away from the right-hand end place of fixed contact 5.Supporting arm 40 locates to be provided with retainer 42 at an upper portion thereof, in order to engage the right side part of first connecting rod 24 in departing mode.The position of supporting arm 40 in the middle of its vertical two ends is provided with L shaped stopper section 44, so that bottom that can backstop second connecting rod 26.
The left part of first connecting rod 24 is inserted in the opening 25 of handle 20.First connecting rod 24 is formed at that in gate-dividing state, its right side part engages with latch members 50.When operating grip so that its when being pivoted to off-position from open position, can driving first connecting rod 24 and slide to the right, thereby its right side part is contacted with the retainer 42 of supporting arm 40.Subsequently, further drive first connecting rod 24 and promote the retainer 42 of supporting arm 40 with its right side part to the right, thereby supporting arm 40 is turned clockwise around the second pivot 9.Second connecting rod 26 tops are inserted in the arcuate furrow 27 of handle 20, and its underpart can hook the stopper section 44 of supporting arm 40.The rod spring 29 that second connecting rod 26 locates to be arranged at handle 20 at an upper portion thereof flexibly drives, thereby moves right (mode with more close opening 25 moves) in guiding groove 27.The guiding groove 27 of handle 20 is located clockwise (being positioned at the below of opening 25 in Fig. 2) and extends on the circumferencial direction of handle 20 with respect to opening 25.
The top of latch members 50 has L shaped stopper section 54, thereby can backstop lives the right side part of first connecting rod 24.The position of latch members 50 in the middle of it is positioned at its vertical two ends is supported on the second pivot 9 pivotally together with supporting arm 40.The bottom of latch members 50 is formed with arc opening 59 to receive therein the first pivot 46.The lower left quarter of latch members 50 is provided with the first pin contacts section 56.The right lower quadrant of latch members 50 is provided with L shaped the second pin contacts section 58.The power that the first pin contacts section 56 and the second pin contacts section 58 can be thus receive to the right from electromagnetic trip device 62 and thermal tripping device 68 respectively, thus make latch members 50 around the second counterclockwise pivotable of pivot 9.
Latch members 50 at spring retainer 52 places in abutting connection with case spring 51.The middle part of case spring 51 has spring coil, and the second pivot 9 passes this spring coil.Case spring 51 is configured to spring retainer 52 and the indicating device 70 with its relative end butt latch members 50.Case spring 51 provides the bias force that latch members 50 is turned clockwise around the second pivot 9.When operating grip 20 was pivoted to off-position from open position, first connecting rod 24 slided to the right, thereby latch members 50 is turned clockwise around the second pivot 9 under the effect of bias force.When the power to the right when supporting arm 40 by first connecting rod 24 is switched to closing position, latch members 50 in the situation that first connecting rod 24 be plugged between latch members 50 and supporting arm 40, promote supporting arm 40 to the right under the effect of the bias force of case spring 51, thus supporting arm 40 is remained in closing position.That is to say, latch members 50 is formed at pivotable between locked position of coupler and off-position, in locked position of coupler, supporting arm 40 is maintained at closing position under the effect of the spring biases strength of case spring 51 in, in the off-position, thereby supporting arm 40 is released from latch members and is allowed to towards the open position pivotable.Thereby latch members 50 is activated towards the locked position of coupler pivotable.In addition, case spring 51 provides the spring biases strength that indicating device 70 is rotated counterclockwise around the second pivot 9.
The middle part of spring member 38 has spring coil, and the first pivot 46 passes this spring coil.Spring member 38 is configured to the protruding (not shown) of its relative end butt body 2 and the spring retainer 34 of movable rod 30.That is to say, spring member 38 is arranged at the end relative with movable contact 32 for the first pivot 46 of movable rod 30.Therefore, spring member 38 provides and makes the spring-biased that movable rod 30 turns clockwise around the first pivot 46 and the spring-biased that supporting arm 40 is rotated counterclockwise around the second pivot 9.That is to say, in the time of when latch members 50 remains on closing position with supporting arm 40 under the effect of the bias force of case spring 51 in, thereby movable rod 30 is driven by spring member 38 movable contact 32 and fixed contact 5 is contacted with predetermined contact.Be allowed to towards away from the rotation of the open position of closing position the time thereby be released from latch members 50 when supporting arm 40, supporting arm 40 is driven to be switched to counterclockwise open position around the second pivot 9 by spring member 38.
In circuit breaker in the present embodiment, converting unit 6 is made of movable rod 30, supporting arm 40, latch members 50, first connecting rod 24 and second connecting rod 26, they are made by metal rather than expensive synthetic resin, thereby can reduce the manufacturing cost of circuit breaker.Therefore the intensity of metal parts can make the parts of converting unit 6 compact higher than the intensity of synthetic resin.Metal parts is high temperature resistant, thereby can make circuit breaker keep for a long time high-quality.
Electromagnetic trip device 62 as tripgear comprises by the thread coil 63 of rectangle bolt for fastening a door from outside, bobbin 64, fixed magnetic core (not shown), movable magnetic core (not shown), back-moving spring (not shown), press-on pins 65 and yoke 66.Stator 4 is fixed in an end of coil 63.Cylindrical shape is made and be configured as to bobbin 64 by dielectric synthetic resin, and coil 63 is wrapped in the outside of bobbin 64.Accommodating fixed magnetic core, movable magnetic core and back-moving spring (not shown) in bobbin, this back-moving spring drives movable magnetic core and moves away from fixed magnetic core.Movable magnetic core is configured to slide along the longitudinal direction in bobbin 64.Press-on pins 65 is connected in movable magnetic core, and its leading section is positioned at the outside of bobbin 64.Press-on pins 65 is configured to move when the fixed magnetic core when movable magnetic core the first pin contacts section 56 that promotes latch members 50 with its leading section to the right.O shape is made and substantially formed to yoke 66 by magnetic material, and its lower left quarter is cut.Bobbin 64 be configured to by 66 of yokes around.The right side of yoke 66 is divided and is formed with the opening (not shown), and press-on pins 65 is passed this opening.The right side part of yoke 66 is formed with fixture, and this fixture is fastened onto end and the stator 4 of coil 63.
Electromagnetic trip device 62 as tripgear is formed in the situation that does not have electric current to flow through coil 63 (being in gate-dividing state), under the effect of the bias force of back-moving spring, movable magnetic core is separated with fixed magnetic core, thereby the press-on pins 65 that is connected in movable magnetic core is moved to the left.In the situation that there is electric current to flow through coil 63, electromagnetic trip device 62 produces attraction between movable magnetic core and fixed magnetic core, thereby the magnetic resistance of the magnetic circuit by fixed magnetic core, yoke 66 and movable magnetic core is minimized.When the overload current such as short circuit current flow through coil 63, movable magnetic core overcame the bias force of back-moving spring and moves near fixed magnetic core, thereby the press-on pins 65 that is connected in movable magnetic core is moved right.When further being moved right, press-on pins 65 promotes the first pin contacts section 56 of latch members 50 to the right with its leading edge, activate thus converting unit 6 with tripping operation.Specifically, press-on pins 65 is forced to promote the first pin contacts section 56 to the right, thereby causes latch members 50 around the second counterclockwise pivotable of pivot 9.In the counterclockwise pivotable of latch members 50, converting unit 6 is constructed such that supporting member 40 and latch members 50 disconnect and disconnect with first connecting rod 24, thereby make supporting arm 40 be switched to counterclockwise open position under the effect of the spring-biased of spring member 38, forcibly make thus contact separated from one another.Cause the tripping operation action so that contact separated from one another after, the electric current that flows through coil 63 reduces to act on the attraction on movable magnetic core, thereby make press-on pins 65 be moved to the left initial position, movable magnetic core is moved to the left under the effect of the bias force of back-moving spring simultaneously.
In the circuit breaker of present embodiment, converting unit 6 and thermal tripping device 62 are made of metal respectively, therefore must make converting unit 6 and thermal tripping device 62 electric insulations.In the present embodiment, housing 1 is provided with dielectric spacer between converting unit 6 and thermal tripping device 62.This dielectric spacer is configured to not the movement of limiting pressure pin 65 therefrom.This dielectric spacer is made of dielectric spacer 2e, the 2f of the inside that is arranged at body 2 and the dielectric spacer (not shown) that is arranged at the inside of capping 3.When due to being connected and disconnection when producing electric arc between movable contact 32 and fixed contact 5, these dielectric spacer make it possible to prevent that electric arc is passed to electromagnetic trip device 62 via metal converting unit 6.Make close contact each other owing to for assemble case 1, the dielectric spacer in the inside of the dielectric spacer in the inside of body 2 and capping 3 being connected into, so this circuit breaker makes it can make by means of dielectric spacer converting unit 6 and electromagnetic trip device 62 electric insulations.
The bimetal leaf 69 of thermal tripping device 68 can form by being designed to by self-heating crooked directly-heated type metal, or the indirect-heating metal of bending forms by being designed to by heating around the laminated sheet of the flake heater of its setting.The middle part of bimetal leaf 69 is anchored on an end of braided wire 13, and relative the other end of braided wire 13 is connected in movable rod.In the situation that do not have electric current to flow through bimetal leaf 69, can not make bimetal leaf crooked, and its end keep separating with the second pin contacts section 58.Bimetal leaf 69 is designed to the bending by the heat that produces due to the overcurrent such as overload current that flows through the circuit between power supply side terminal 90A and load side terminal 90B.When bimetal leaf 69 heated bending, bimetal leaf 69 promotes the second pin contacts section 58 to the right with its edge, thereby latch members 50 is rotated counterclockwise around the second pivot 9, causes thus converting unit 6 tripping operations.At movable contact because of tripping operation and fixed contact after separating, thereby the electric current that flows through bimetal leaf 69 reduces to make this bimetal leaf cooling.When being cooled, bimetal leaf 69 straightens and its edge is separated with the second pin contacts section 58, so be back to its initial position.
The moulded parts of indicating device 70 for being made by synthetic resin, and be configured to by making the discovering window 8 of himself locating through the top of body 2 expose indication "on" position, gate-dividing state and tripped condition.As shown in Figure 20 to 23, indicating device 70 comprises each other integrally formed sheet rotor 71, spring retainer 72, indicating piece 73, fastener 74 and 74, connector 75, guiding piece 76 and projection 77.Rotor 71 is provided with opening 78, the second pivots 9 and passes from this opening 78, as shown in Figure 20 to 23.That is to say, rotor 71 is supported on the second pivot 9 pivotally together with supporting arm 40 and latch members 50.The Width that spring retainer 72 forms from the upper left quarter of rotor 71 along indicating device protrudes (protruding along direction forward) among Figure 20, thereby is resisted against on the stopper section 44 of supporting arm 40.An end of case spring 51 is resisted against on the spring retainer 72 of indicating device 70.Indicating piece 73 is formed the part that has around the second pivot 9 bendings, and is configured such that at least a portion in its front manifests via indicating window 8.Fastener 74,74 is formed at respectively the office, left side of the relative side (front and back in Figure 20) of indicating piece 73, and extends to the right from this end face that is parallel to indicating piece 73.The end face that connector 75 is formed at rotor 71 is sentenced to the upper right side and is stretched out, thereby rotor 71 is connected in the bottom surface of indicating piece 73 through this connector 75.Guiding piece 76 is formed from the bottom, right side of indicating piece 73 and extends the below left.Projection 77 is formed from the top, right side of rotor 71 stretches out to the right.The position that be positioned at its circumferential end in the middle of of indicating piece 73 in its end face is provided with recess, and this recess is as the separating brake instruction unit 73a of indication gate-dividing state.Indicating piece 73 is provided with the combined floodgate instruction unit 73b of indication "on" position and the tripping operation instruction unit 73c of indication tripped condition at its relative circumferential end place.Instruction unit 73a, 73b, 73c have different colors and character, are used for from visually identifying "on" position, gate-dividing state and tripped condition.
Extinguisher 80 is formed by electric arc guider 82 and arc extinguishing grid 84.This electric arc guider 82 forms by the sheet metal of bending elongated rectangular.One end of electric arc guider 82 is connected in the base portion of bimetal leaf 69, and the other end is provided with arc quenching plate 86.Arc quenching plate 86 is formed from the left part of the diapire of housing 1 and extends, and is provided in above vertical direction yoke 66.Grid 84 is made of arc quenching plate 87 and supporting slice 88.Arc quenching plate 87 is made by a plurality of conducting strips, and these conducting strip in the vertical directions are spaced.Supporting slice 88 is made by dielectric material, and is configured to cover the relative side of each arc quenching plate 87.Grid 84 is arranged between the bottom of sheet 86 and yoke 66.This extinguisher 80 can extinguish due to being connected and electric arc that disconnection produces between movable contact 32 and fixed contact 5.As if extinguisher 80 can be made by conventional equipment, therefore need not to be elaborated in the present embodiment.
As shown in Figure 12 to 15, body 2 and capping 3 are connected to form plug wire mouth 16,16 and circular tool socket 18,18. Plug wire mouth 16,16 forms by the rectangle groove (not shown) that will be attached to around rectangle groove 16a, the 16a (Figure 16 is with shown in 18) of the opening on the relative sidewall that is located at body 2 opening on the relative sidewall that is located at capping 3.The semi-circular grooves (not shown) that semi-circular grooves 18a, 18a (shown in Figure 16 to 19) on the opposite flank of the antetheca of tool receptacle 18,18 by will be located at body 2 is attached on the side direction opposite flank of the antetheca that is located at capping 3 forms.
Outer lead on mains side and the outer lead on load-side are connected to respectively power supply side terminal 90A and load side terminal 90B.Power supply side terminal 90A and load side terminal 90B comprise respectively the screw holder that roughly takes the shape of the letter U 92,92, rectangular tubular locator 94,94 (that is, post terminals) and the screw 96,96 of being made by sheet metal.The screw holder 92 of load side terminal 90B is fixed in an end of coil 63.The screw holder 92 of power supply side terminal 90A is fixed in an end of braided wire 12, and the relative other end of this braided wire 12 is fixed in bimetal leaf 69.Utilize this configuration, movable contact 32 can be contacted with fixed contact 5, with the circuit of formation through the screw holder 92 of screw holder 92, braided wire 12, bimetal leaf 69, braided wire 13, movable rod 30, movable contact 32, fixed contact 5, stator 4, coil 63 and the load side terminal 90B of power supply side terminal 90A.
Screw holder 92 comprises retention tab 92a, terminal plate 92b and intermediate 92c, and 92c is connected to terminal plate 92b with retention tab 92a by this intermediate.Retention tab 92a is provided with the opening (not shown), and screw 96 passes this opening.Screw 96 is kept by retention tab 92a, and can arbitrarily engage with retention tab.Terminal plate 92b is designed to engage with locator 94.Locator 94 is made by conducting metal, and forms the rectangular tube that extends laterally.Locator 94 comprises screw receiver 94a and fixture 94b.Screw receiver 94a is provided with the opening (not shown), is used for screw 96 is received in this opening.Fixture 94b is oriented to away from screw receiver 94a.Terminal plate 92b is arranged on the inside of tubulose locator 94, thereby is plugged between screw receiver 94a and fixture 94b.Screw holder 92 is plugged between the distance piece of the distance piece of body 2 inside and capping 3 inside securely.That is to say, make the locator 94 can be in the situation that terminal plate 92b is plugged between screw receiver 94a and fixture 94b is shifted with respect to terminal plate 92b.Fixture 94b and terminal plate 92b correspondingly are arranged in and are formed with the gap therebetween.This gap is communicated with plug wire mouth 16, being received in this gap by the outer lead of plug wire mouth 16 guiding.In the situation that receive in screw receiver 94a, screw 96 is arranged, locator 94 is shifted by the rotation of screw 96, outer lead being fastened between fixture 94b and terminal plate 92b, thereby make it possible to the outer lead on mains side and the outer lead on load-side are connected to respectively power supply side terminal 90A and load side terminal 90B.Each fixture 94b is provided with guide plate 98 and catch 99.Guide plate 98 stretches out through the plug wire mouth 16 of housing 1.Catch 99 is from the bottom surface of fixture 94b to downward-extension.Catch 99 is formed its width greater than the width of plug wire mouth 16.
Below with reference to Fig. 1,2 and 16 to 19 couples, outer lead is illustrated with the method that load side terminal 90B is connected with power supply side terminal 90A respectively.In Figure 17 and 19, for simple purpose, and not shown indicating device 70 and braided wire 12,13.When utilizing the bottle opener (not shown) that inserts through instrument jack 18 to unscrew screw 96, until contacting with the root edge of plug wire mouth 16, the bottom surface of guide plate 98 force the locator 94 that engages with screw 96 to move down together with guide plate 98 by rotary screw 96.The intermediate 92c of screw holder 92 is used for preventing that outer lead from being guided mistakenly between terminal plate 92b and screw receiver 94a.
When utilizing the bottle opener (not shown) that inserts via instrument jack 18 to tighten screw 96, until the end face of guide plate 98 contacts with the upper limb of plug wire mouth 16 (shown in Figure 16 and 17), locator 94 is moved up by rotary screw 96.The catch 99 that is arranged at locator 94 is configured to move together with locator 94, thereby the part that prevents plug wire mouth 16 and fixture 94b below is communicated with, and prevents that thus outer lead from being guided mistakenly below locator 94.
Below just outer lead 100 is described with the step that power supply side terminal 90A is connected.When locator 94 is located downwards as illustrated in fig. 1 and 2, with the exposed heart yearn of outer lead 100 through 16 guiding of plug wire mouth between the fixture 94b of the terminal plate 92b of screw holder 92 and locator 94.Utilize subsequently the bottle opener that inserts via tool receptacle 18 to tighten screw 96, rotation by screw 96 forces locator 94 to move up thus, in order to the heart yearn of outer lead 100 is fastened between terminal plate 92b and fixture 94b, thereby outer lead 100 is connected to power supply side terminal 90A (shown in Figure 18 and 19).After this, utilize the bottle opener that inserts via tool receptacle 18 to unscrew screw 96, thereby force locator 94 to move down by rotary screw 96, make it possible to thus easily outer lead be removed from power supply side terminal 90A.Can in an identical manner outer lead be connected and disconnect with load side terminal 90B.Guide plate 98 is configured to together with locator 94 to move by the rotation of screw 96, makes the user easily settle locator 94 based on the position of guide plate 98.Guide plate 98 can be guided between the fixture 94b of the terminal plate 92b of screw holder 92 and locator 94 outer lead 100, thereby guarantees the reliable electrical connection of outer lead 100.
Operation below with reference to Fig. 2 to 11 explanation circuit breaker.In gate-dividing state, the handle 22 of handle is driven into the left border close contact with window 2a under the effect of the bias force of handle spring.In this state, to promotion, and its right side divides maintenance not contact with supporting arm 40 to the left part of first connecting rod 24 by upper.The top of second connecting rod 26 is pushed upwardly.That is to say, in gate-dividing state, supporting arm 40 is driven with around the second counterclockwise pivotable of pivot 9 by spring member 38, thereby is maintained in open position, and the first pivot 46 contacts with the right side edge of guiding groove 2b.In this state, the stopper section 44 of supporting arm 40 is resisted against on the retainer 36 of movable rod 30, and movable contact 32 separates with fixed contact 5.In this state, the stopper section 54 of latch members 50 is hooked by the right side part of first connecting rod 24, thereby can not be shifted.In this state, the bias force that indicating device 70 is blocked spring 51 drives with around the second counterclockwise pivotable of pivot 9.As shown in figure 24, the fastener 74 of indicating device 70 is engaged with the bump bonding 10 that is arranged at housing 1, thereby expose the separating brake instruction unit 73a of indicating piece 73 by the discovering window 8 of body 2.
Action the process that is converted to "on" position (shown in Fig. 3,7 and 11) from gate-dividing state (shown in Fig. 2,6 and 9) is illustrated to converting unit 6.When making the thorny arbor 28 clockwise pivotable of the handle 20 that is in gate-dividing state, the right side part of first connecting rod 24 is resisted against on the retainer 42 of supporting arm 40, and the retainer 42 with this supporting arm 40 pushes away to the right subsequently.When promoting retainer 42, make supporting arm 40 around the second clockwise pivotable of pivot 9.Meanwhile, the first pivot 46 that is fixed in the bottom of supporting arm 40 slidably moves towards stator 4 (being moved to the left in Fig. 2) in groove 2b, thereby causes being supported on pivotally movable rod 30 action left simultaneously of the first pivot 46.
To being elaborated to second connecting rod 26, action that movable rod 30 is relevant with supporting arm 40 the process that is converted to "on" position from gate-dividing state of converting unit 6.Supporting arm 40 in response to handle 20 from the operation of the gate-dividing state shown in Fig. 9 and in the second pivot 9 pivotable certain angles, the bottom of second connecting rod 26 is moved down, thereby be resisted against on the retainer 36 of movable rod 30, and subsequently the retainer 36 of this movable rod 30 pushed away downwards.When movable rod 30 is born the downward power of second connecting rod 26, force movable rod 30 to overcome the bias force of spring member 38 around the first counterclockwise pivotable of pivot 46.That is to say, in the situation that there is the downward power on retainer 36 of acting on of second connecting rod 26, make movable rod 30 around the first counterclockwise pivotable of pivot 46, the first pivot 46 is moved to the left (shown in Figure 10) simultaneously.Supporting arm 40 in being in this state during further to the closing position pivotable, upwards promotes to be inserted into the top of the second connecting rod 26 in guide channel 27 in response to the operation of handle 20, thereby discharges movable rod 30.With movable rod 30 after second connecting rod 26 discharges, make movable rod 30 can be under the effect of the bias force of spring member 38 around the first pivot 46 pivotable fast clockwise.In the atwirl situation of movable rod 30, make movable contact 32 close fixed contact 5 and contact with fixed contact 5 (as shown in Figure 11) fast.In this structure, in order to prevent that movable contact 32 from further moving near fixed contact 5, second connecting rod 26 be configured to when make supporting arm 40 be switched to closing position before pivotable prevent that movable rod 30 pivotables from surpassing the pivoting angle of being scheduled to when surpassing predetermined pivoting angle.This structure can also contact with it by fast approaching fixed contact 5 movable contact 32, thereby suppresses the generation of electric arc.The top of second connecting rod 26 is driven that by rod spring 29 movable rod 30 is discharged from second connecting rod 26, make it possible to when movable rod 30 is discharged from second connecting rod 26, accurately locate the bottom of second connecting rod 26, thereby realize the stable operation of converting unit 6.Suitably the bias force of control link spring 29 with when movable rod 30 is discharged from second connecting rod 26, changes the pivoting angle of handle 20.Thereby the conventional circuit breaker of some members of causing wearing and tearing of mutually sliding is compared with needs, and the circuit breaker of present embodiment makes it possible to prevent that movable contact 32 from need not to make some members mutually to slide near fixed contact 5, thereby makes converting unit 6 durables.
During being converted to the process of closing position from open position, under the effect of the bias force of case spring 51, latch members 50 is activated and pivotable clockwise.Therefore, drive latch members 50 being switched to locked position of coupler, and its stopper section 54 divides with the right side of first connecting rod 24 and engage, thereby the right side part of while first connecting rod 24 makes supporting arm 40 be switched to closing position in abutting connection with supporting arm 40.Be in the latch members 50 in locked position of coupler in the situation that first connecting rod 24 is plugged on and is blocked spring 51 between latch members 50 and supporting arm 40 and drives, promoting supporting arm 40 to the right, thereby supporting arm 40 can be maintained in closing position.
During being converted to the process of closing position from open position in response to the operation of handle, the stopper section 44 of supporting arm 40 overcomes the bias voltage of case spring 51 and promotes the spring retainer 72 of indicating device 70 along the direction that makes progress in Fig. 3, thereby indicating device 70 is turned clockwise around the second pivot 9.The part that contacts with each other in off-position with spring retainer 72 that the pivot position that is in the indicating device 70 in "on" position depends on stopper section 44.The left side circumferential end (separating brake instruction unit 73b) that is in the indicating piece 73 of the indicating device 70 in "on" position is exposed (as shown in Figure 25) through discovering window 8.In "on" position, the left part of first connecting rod 24 is positioned at the below by the imaginary line of the right side part of Handle axis 28 and first connecting rod 24, as shown in Figure 3, so that the bias force of the bias force of balancing spring member 38 and handle spring.Spring force after balance is maintained in off-position the handle 22 of handle 20, thereby movable contact 5 and fixed contact 5 are kept in touch.
Converting unit 6 is being described in response to the action the lever operated process that is converted to gate-dividing state (Fig. 2,6 and 9) from "on" position (Fig. 3,7 and 11).When manipulation is in handle 22 in "on" position so that the thorny arbor 28 of handle 20 when being rotated counterclockwise to open position from off-position, the top of second connecting rod 26 is pushed upwardly.Meanwhile, the left part of first connecting rod 24 is pushed upwardly, thereby promotes the stopper section 54 of latch members 50 left with its right side part, activate latch members 50 around the second pivot 9 towards the off-position counterclockwise pivotable.When counterclockwise pivotable, latch members 50 can not remain in supporting arm 40 in closing position, makes the supporting arm 40 can be around the second counterclockwise pivotable of pivot 9 under the effect of the bias force of spring member 38.Because supporting arm 40 supports movable rod 30 pivotally by the first pivot 46, therefore the supporting arm 40 of pivotable makes movable rod 30 rotations counterclockwise, thereby movable contact 32 is separated fast with fixed contact 5.That is to say, spring member 38 drives movable rod 32 by its bias force to be separated fast with fixed contact 5, thereby prevents electric arc.Allow supporting arm 40 to be pivoted to until the first pivot 46 is positioned the right side edge of guiding groove 2b.In this simultaneously, latch members 50 is by pivotable, and subsequently in the situation that its stopper section 54 is hooked by the right side part of first connecting rod 24 stops.Indicating device 70 is by pivotable, and stops (as shown in Figure 24) in the situation that the mid portion of indicating piece 73 (separating brake instruction unit 73a) exposes through discovering window 8 subsequently.Then, to after thermal tripping device 68 and electromagnetic trip device 62 detect overcurrent separately the process that is converted to tripped condition (Fig. 4 and Fig. 8) from "on" position the tripping operation of converting unit 6 action describe.
Action in response to the overcurrent that is detected by thermal tripping device 68 is illustrated to converting unit.In the situation that the abnormal current such as overcurrent flows through the foregoing circuit in being in "on" position, bimetal leaf 69 is heated by overcurrent, thereby causes subsequently the crooked bias force that overcomes case spring 51 of this bimetal leaf 60 and the second pin contacts section 58 of promoting latch members 50 with its top to the right.When the second pin contacts section 58 was promoted to the right, latch members 50 was switched to the off-position away from locked position of coupler counterclockwise around the second pivot 9, and move away from the retainer 42 of supporting arm 40 stopper section 54 that makes latch members 50.
When by counterclockwise pivotable, latch members 50 no longer remains in closing position with supporting arm 40, makes thus the supporting arm 40 can be around the second counterclockwise pivotable of pivot 9 under the effect of the bias force of spring member 38.Because supporting arm 40 supports movable rod 30 pivotally by the first pivot 46, so supporting arm 40 counterclockwise makes movable rod 30 rotations in pivotable, and movable contact 32 is separated fast with fixed contact 5.Therefore, spring member 38 drives movable contact 32 to separate fast with fixed contact 5 by its bias force.Meanwhile, the stopper section 44 of supporting arm 40 is resisted against on the retainer 36 of moveable arm 30.
After the stopper section 54 with latch members 50 disconnects, move to touch guiding piece 76 along the direction that makes progress in Fig. 4 on the right side part of first connecting rod 24, and indicating device 70 is rotated counterclockwise around the second pivot 9, cross in order to drive fastener 74 projection 10 that is arranged at housing 1 inside.That is to say, compare with the situation in "on" position, the indicating device 70 in tripped condition is by more strongly along counterclockwise pivotable, in order to expose the tripping operation instruction unit 73c of indicating piece 73 by discovering window 8.
Tripped condition (Fig. 4 and 8) afterwards, handle 20 is switched to open position from off-position under the effect of the bias force of handle spring, pull simultaneously the right side part of first connecting rod 24 left.Subsequently, the right side part of first connecting rod 24 is guided towards guiding piece 76, in order to engage with the stopper section 54 of latch members 50, and except the pivot position of indicating device 70, presents gate-dividing state.
Action in response to the overcurrent that is detected by electromagnetic trip device 62 is illustrated to converting unit.When circuit in flowing through "on" position of abnormal current such as short circuit current is arranged, make coil 63 produce magnetic field because overcurrent therefrom flows through.In response to this magnetic field, make under the effect of the attraction of movable magnetic core between itself and fixed magnetic core mobile near fixed magnetic core, thereby the magnetic resistance of the magnetic circuit by fixed magnetic core, yoke 66 and movable magnetic core is minimized.Be associated with the movement of movable magnetic core, thereby press-on pins 65 moves right and promotes the first pin contacts section 56 of latch members 50 to the right.When pushing away the first pin contacts section 56 to the right, latch members 50 is around the second counterclockwise pivotable of pivot 9, thereby makes stopper section 54 be moved further retainer 42 away from supporting arm 40.The same with thermal tripping device 68, electromagnetic trip device 62 also causes the tripping operation action in response to the abnormal current that detects thus of converting unit 6, this tripping operation action comprises the counterclockwise pivotable of latch members 50, thereby movable contact 32 is separated fast with fixed contact 5.
In order to recover "on" position after the gate-dividing state after tripped condition, can operating handle 22 so that handle 20 goes to off-position in the mode identical with pivot action above-mentioned process be converted to "on" position from gate-dividing state from the open position dextrorotation.With with operate conversion equipment 6 and indicating device 70 from opening a sluice gate state-transition same mode to the "on" position, therefore think and need not carry out repeat specification.
Fig. 5 shows the circuit breaker that is in as-welded, and in as-welded, movable contact 32 is because overload current is fused to fixed contact 5.When overload current being detected, being in thermal tripping device 62 in "on" position and electromagnetic trip device 68 activated and promotes respectively the first pin contacts section 56 and the second pin contacts section 58, thereby the stopper section 54 that causes latch members 50 is moved further the retainer 42 away from supporting arm 40, latch members 50 is rotated counterclockwise, as mentioned above around the second pivot 9.After the stopper section 54 of latch members 50 disconnected with first connecting rod 24, the bias force driving handle 20 of handle spring was so that the counterclockwise pivotable of its thorny arbor 28.Because movable contact 32 is fused to fixed contact 5, therefore stop movable rod 30 around the first counterclockwise pivotable of pivot 46.Correspondingly, stop supporting arm 40 to be maintained in closing position around the second counterclockwise pivotable of pivot 9.In latch members 50 during around the second pivot 9 counterclockwise pivotable, the pivoting angle that the counterclockwise pivotable of the thorny arbor 28 of handle 20 is predetermined.After making this pivoting angle of handle 20 pivotables, the bottom of the second connecting rod 26 that engages with handle 20 is resisted against on the retainer 36 of movable rod 30, and subsequently with its downward promotion.Although 36 places promote movable rod 30 downwards at retainer, the welding between fixed contact and movable contact 32 but stops movable rod 30 pivotables.Therefore, prevent that second connecting rod 28 from further moving down, and its top is resisted against on the upper limb of guiding groove 27 as shown in Figure 5.Therefore, prevent that handle 20 is pivoted to open position, thereby be held in place position in the middle of off-position and open position of handle 22, make thus the user can easily identify this as-welded that movable contact 32 is fused to fixed contact 5.
Circuit breaker in present embodiment not only is equipped with electromagnetic trip device 62 but also be equipped with thermal tripping device 68, but also can be equipped with any one in electromagnetic trip device and thermal tripping device.And do not require that each tripgear in the present invention has above-mentioned structure.In the present invention, power supply side terminal 90A, load side terminal 90B and converting unit 6 also need not to have above-mentioned structure, and can suitably construct according to external environment condition.

Claims (2)

1. circuit breaker comprises:
-housing, described housing is provided with fixed contact and movable contact;
-handle, described handle is supported on described housing pivotally, with can thorny arbor pivotable between open position and off-position; With
-converting unit, described converting unit are configured to make in response to the pivot action of described handle described movable contact be connected and disconnect with described fixed contact; And
Described converting unit comprises:
-with the movable rod of described movable contact;
-supporting arm, described supporting arm are with described movable rod supporting thereon;
-first connecting rod and second connecting rod, described first connecting rod and described second connecting rod all are configured to operate in response to the action of described handle described supporting arm; With
-spring member;
Wherein, the described movable contact of described movable rod is positioned at an end of described movable rod, and described movable rod is supported on described supporting arm at the position that is positioned at its centre, vertical two ends pivotally by the first pivot, described supporting arm is formed at its end away from described handle and keeps described the first pivot in order to can move together with described the first pivot
Wherein, described supporting arm is supported on described housing at the position that is positioned at its centre, vertical two ends pivotally by the second pivot, to turn round between closing position and open position around described the second pivot, described supporting arm is configured to maintain described movable rod and makes described movable contact keep contacting with described fixed contact when being arranged in described closing position, described supporting arm is configured to make described movable contact to be kept away from described fixed contact when being arranged in described open position
Described first connecting rod is configured to towards the action of described open position, described supporting arm be rotated away from described off-position in response to described handle towards described closing position away from described open position around described the second pivot;
Described spring member is connected in described movable rod in an end relative with described movable contact for described the first pivot of described movable rod,
Wherein, when described supporting arm is in described closing position, described spring member provides and makes described movable rod around described the first pivot rotation and make described movable contact keep the spring-biased that contacts with described fixed contact, and when allowing described supporting arm away from described closing position location, described spring member provides and makes described supporting arm around the spring-biased of described the second pivot from described closing position to described open position rotation
Described second connecting rod is formed at and makes the rotation from described open position to described off-position and when described the second pivot moves from described open position to described closing position in response to described handle of described supporting arm in predetermined angular range, limit described movable rod to overcome the bias voltage of described spring member and can not surpass predetermined angular around described the first pivot pivotable
Described second connecting rod is configured to surpass described predetermined pivot angle and discharge described movable rod to described closing position pivotable in response to described supporting arm, thus make described movable rod can be under the spring-biased of described spring assembly around described the first pivot along the direction pivotable that described movable contact and described fixed contact are kept in touch.
2. circuit breaker as claimed in claim 1 wherein, drivenly thereby described second connecting rod is provided with rod spring discharges described movable rod.
CN200980107393.3A 2008-03-06 2009-02-23 Circuit breaker Active CN101978460B (en)

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CN114783837A (en) * 2022-03-28 2022-07-22 伊顿电气有限公司 Operating system of miniature circuit breaker and miniature circuit breaker with same

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