CN201838531U - Synchronous auxiliary contact - Google Patents

Synchronous auxiliary contact Download PDF

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Publication number
CN201838531U
CN201838531U CN201020594525XU CN201020594525U CN201838531U CN 201838531 U CN201838531 U CN 201838531U CN 201020594525X U CN201020594525X U CN 201020594525XU CN 201020594525 U CN201020594525 U CN 201020594525U CN 201838531 U CN201838531 U CN 201838531U
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CN
China
Prior art keywords
movable contact
contact plate
tripping
circuit breaker
pedestal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201020594525XU
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Chinese (zh)
Inventor
邹城华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Tengen Electric Co Ltd
Original Assignee
Zhejiang Tengen Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Tengen Electric Co Ltd filed Critical Zhejiang Tengen Electric Co Ltd
Priority to CN201020594525XU priority Critical patent/CN201838531U/en
Application granted granted Critical
Publication of CN201838531U publication Critical patent/CN201838531U/en
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Expired - Lifetime legal-status Critical Current

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Abstract

The utility model relates to a synchronous auxiliary contact, which mainly solves the technical problems that the existing remote control end can not display the on and off states of the main circuit of a circuit breaker when the circuit breaker is controlled to be broken and closed, and the like; and the synchronous auxiliary contact is characterized in that a movable contact plate, an operating mechanism and a lock mechanism are arranged in a base, the movable contact plate is articulated on the base, and movable contact pieces of two groups of contact mechanisms are respectively connected with the movable contact plate, and the movable contact plate controls the breaking and closing of the two groups of contact mechanisms; the operating mechanism is arranged in the base and forms synchronous linkage with an operating handle of the circuit breaker, and the operating mechanism can drive the movable contact plate to break the other group of the contact mechanism while closing one group of the contact mechanism; and the lock mechanism is arranged on the movable contact plate to cause the movable contact plate to be in a locking state while the movable contact plate drives the contact mechanisms to close and break, and the lock mechanism can break the contact mechanisms synchronously while a tripping mechanism of the circuit breaker drives the circuit breaker to break. The synchronous auxiliary contact has the effect that the movable contact plate can break the other group of the contact mechanism while closing one group of the contact mechanism under the driving force of the operating mechanism.

Description

A kind of synchronous auxiliary contact
Technical field
The utility model relates to a kind of indicating device of connecting and disconnecting of the circuit, relates to a kind of synchronous auxiliary contact in particular, is the corollary equipment of Long-distance Control circuit breaker.
Background technology
Adopt circuit breaker to control the disjunction of illuminating line mostly in the public illumination field with long-range disjunction function, in use, the long-range disjunction module of circuit breaker is connected with remote control terminal, send the long-range disjunction that instruction realizes circuit breaker by remote control terminal, though be convenient to management like this, save human cost; But when the disjunction of remote control terminal control circuit breaker, deciliter state that can't show the circuit breaker main circuit on the remote control terminal, the personnel of controlling can't judge that it still is that circuit or circuit breaker disconnect that load is broken down, and there is certain potential safety hazard in the maintenance personal when maintenance like this.
Summary of the invention
In order to solve existing remote control terminal when controlling the circuit breaker disjunction, can't show the technical problems such as deciliter state of circuit breaker main circuit; The utility model provides a kind of synchronous auxiliary contact, this synchronous auxiliary contact communicates with remote control terminal with the circuit breaker synchronous interaction and by lead, when the remote control terminal breaking circuit breaker, remote control terminal just can show deciliter state of circuit breaker main circuit, eliminates safe hidden trouble like this.
For solving above technical problem, the technical scheme that the utility model is taked is a kind of synchronous auxiliary contact, it comprises pedestal and cover plate, be respectively equipped with contact mechanism in the pedestal both sides, contact mechanism includes two binding posts, static contact and movable contact springs, static contact is fixedlyed connected with one of them binding post, and movable contact spring one end and another binding post fix; It is characterized in that being provided with in described pedestal movable contact plate, operating mechanism and locking mechanism, the movable contact spring that the movable contact plate is hinged on pedestal and two groups of contact mechanisms links to each other with the movable contact plate respectively, is controlled the breaking and closing of two groups of contact mechanisms by the movable contact plate; Operating mechanism is installed in the pedestal and can orders about the movable contact plate in closed one group of contact mechanism, another group contact mechanism of disjunction with the operating grip synchronous interaction and the operating mechanism of circuit breaker; Locking mechanism is installed in the movable contact plate is in the lock state when ordering about the closed and disjunction of contact mechanism, and locking mechanism is in the tripping mechanism driving circuit breaker disjunction of circuit breaker, the contact mechanism of disjunction synchronously.
Further, described operating mechanism includes handle, reduction torsion spring and U type connecting rod, described locking mechanism includes snap close, tripping, torsion spring and extension spring, and handle is hinged in the pedestal and reduction torsion spring is nested with on the jointed shaft of handle, and its two ends link to each other with handle with pedestal respectively; Described tripping is hinged on the end of movable contact plate, and U type connecting rod one end links to each other with tripping, and the other end links to each other with handle; Described snap close is hinged on the movable contact plate and the tripping mechanism synchronous interaction by gangbar and circuit breaker, torsion spring is installed on the movable contact plate, the one end compresses mutually with snap close snap close is cooperated with tripping phase hook all the time, the other end and movable contact plate fix, described extension spring is installed in movable contact plate both sides, one end links to each other with the movable contact plate, and the other end links to each other with pedestal.
Further, described movable contact plate includes the first movable contact plate and the second movable contact plate, be equipped with draw-in groove on first, second movable contact plate, the movable contact spring of two groups of contact mechanisms snaps in the draw-in groove of first, second movable contact plate respectively and the extension springs of movable contact plate both sides link to each other with first, second movable contact plate respectively; Be provided with jointed shaft in pedestal, be provided with axle sleeve on the first movable contact plate, axle sleeve is nested with on jointed shaft and is hinged with pedestal, and snap close is provided with through hole and this through hole and is nested with on axle sleeve and is hinged with the first movable contact plate; Be provided with latch at the second movable contact plate, one end, this latch inserts in the through hole of snap close and is hinged with snap close, is provided with block at the second movable contact plate other end, this block be arranged on the first movable contact plate sidewall on the mutually spacing cooperation of limiting stand.
Further, the described first movable contact plate is stepped to have both ends of the surface up and down, on the upper surface, be provided with the open slot that communicates with the lower surface, torsion spring and guide vane end stop are arranged on the upper surface, axle sleeve is fixed on the lower surface, and tripping and lower surface are hinged, and is provided with on rectangular groove and the sidewall at the relative end of tripping hinged end and is provided with hook, U type connecting rod one end inserts in the rectangular groove, and the other end links to each other with handle; On described snap close outer wall, be provided with the feeler and the guide vane end stop of band barb, the barb of feeler blocks mutually with the hook of tripping makes snap close that tripping is locked, guide vane end stop places in the open slot, described gangbar is fixed on the guide vane end stop, the corresponding position that reaches cover plate on the second movable contact plate is provided with the deep-slotted chip breaker that is complementary with the gangbar rotational trajectory, and the deep-slotted chip breaker that gangbar is passed the second movable contact plate and cover plate links to each other with breaker tripping mechanism.
The beneficial effects of the utility model are synchronous auxiliary contact to be installed side by side with circuit breaker and separating brake indicator light on the remote control terminal and combined floodgate indicator light are linked to each other with two groups of contact mechanisms of synchronous auxiliary contact, like this when the operating grip close circuit breaker of circuit breaker, synchronous auxiliary contact and circuit breaker synchronizing close, and synchronously the operating mechanism of auxiliary contact orders about the movable contact plate and swings the contact mechanism that makes movable contact plate closing pedestal right side to the right, the contact mechanism disjunction in left side, at this moment, corresponding the lighting of combined floodgate indicator light on the remote control terminal; And when circuit breaker breaks down, tripping mechanism is when ordering about the circuit breaker disjunction, the tripping mechanism synchronous interaction of locking mechanism and circuit breaker, order about the synchronous disjunction of synchronous auxiliary contact and circuit breaker, at this moment, handle resets and drives the movable contact plate to the swing of pedestal left side, make the contact mechanism closure in pedestal left side, the contact mechanism disjunction on right side, corresponding the lighting of separating brake indicator light on the remote control terminal, be convenient to the disjunction situation that the remote control personnel grasp the circuit breaker main circuit in real time like this, eliminate safe hidden trouble, improve security performance.
Description of drawings
Fig. 1 is the cut-away view of a kind of synchronous auxiliary contact of the utility model embodiment.
Fig. 2 is the inside three-dimensional structure diagram of a kind of synchronous auxiliary contact of the utility model embodiment.
Fig. 3 does not install the structure chart of the second movable contact plate for a kind of synchronous auxiliary contact of the utility model embodiment.
Fig. 4 does not install the three-dimensional structure diagram of the second movable contact plate for a kind of synchronous auxiliary contact of the utility model embodiment.
Fig. 5 is the three-dimensional structure diagram of the utility model embodiment second movable contact plate.
Fig. 6 is the three-dimensional structure diagram of the utility model embodiment first movable contact plate.
Fig. 7 is the three-dimensional structure diagram of the utility model embodiment tripping.
Fig. 8 is the three-dimensional structure diagram of the utility model embodiment snap close.
Fig. 9 is the three-dimensional structure diagram of a kind of synchronous auxiliary contact of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model execution mode is described further:
Extremely shown in Figure 9 as Fig. 1, the utility model is a kind of synchronous auxiliary contact, it comprises pedestal 1 and cover plate 2, be respectively equipped with contact mechanism 3 in pedestal 1 both sides, contact mechanism 3 includes two binding posts 31, static contact 32 and movable contact spring 33, static contact 32 is fixedlyed connected with one of them binding post 31, and movable contact spring 33 1 ends and another binding post 31 fix; In order to solve existing remote control terminal when controlling the circuit breaker disjunction, the technical problems such as deciliter state that can't show the circuit breaker main circuit, in described pedestal 1, be provided with movable contact plate 4, operating mechanism 5 and locking mechanism 6, movable contact plate 4 is hinged in the pedestal 1 and the movable contact spring 33 of two groups of contact mechanisms 3 links to each other with movable contact plate 4 respectively, by the breaking and closing of two groups of contact mechanisms 3 of movable contact plate 4 controls; Operating mechanism 5 is installed in the pedestal 1 and can orders about movable contact plate 4 in closed one group of contact mechanism 3, another group contact mechanism 3 of disjunction with the operating grip synchronous interaction and the operating mechanism 5 of circuit breaker; Locking mechanism 6 is installed in movable contact plate 4 is in the lock state when ordering about the closed and disjunction of contact mechanism 3, and locking mechanism 6 is in the tripping mechanism driving circuit breaker disjunction of circuit breaker, the contact mechanism of disjunction synchronously 3.Adopt this structure, in the process of using, synchronous auxiliary contact and circuit breaker are passed through screw side by side, and separating brake on the remote control terminal and combined floodgate indicator light linked to each other with two groups of contact mechanisms 3 of synchronous auxiliary contact respectively, because operating mechanism 5 links to each other with the operating grip of circuit breaker, closure or manual actuation circuit breaker closing at remote control terminal Long-distance Control circuit breaker are fashionable, the operating grip synchronous interaction of operating mechanism 5 and circuit breaker, drive movable contact plate 4 swing to the right and make synchronous auxiliary contact and circuit breaker synchroswitching, at this moment, contact mechanism 3 closures on pedestal 1 right side, contact mechanism 3 disjunctions in pedestal 1 left side, and corresponding the lighting of combined floodgate indicator light on the remote control terminal, the separating brake indicator light then extinguishes, the personnel that control of remote control terminal can judge that circuit breaker is a "on" position by the combined floodgate indicator light like this, and main circuit is communicated with; And because locking mechanism 6 and breaker tripping mechanism synchronous interaction, when circuit breaker breaks down the disjunction of tripping mechanism driving circuit breaker, locking mechanism 6 and tripping mechanism synchronous interaction make operating mechanism 5 separate with locking mechanism 6, and operating mechanism 5 resets movable contact plate 4 is swung left, synchronously auxiliary contact then with the synchronous disjunction of circuit breaker, at this moment, contact mechanism 3 closures on pedestal 1 right side, contact machine look 3 disjunctions in left side, and the separating brake indicator light on the remote control terminal is lighted, and the combined floodgate indicator light extinguishes; By this synchronous auxiliary contact, the on off operating mode of the main circuit of the grasp circuit breaker that the personnel that control of remote control terminal can be real-time eliminates safe hidden trouble.
In the present embodiment, for the ease of operating mechanism 5 order about movable contact plate 4 swing control contact mechanism 3 disjunction and closure, described operating mechanism 5 includes handle 51, reduction torsion spring 52 and U type connecting rod 53, described locking mechanism 6 includes snap close 61, tripping 62, torsion spring 63 and extension spring 64, handle 51 is hinged in the pedestal 1 and reduction torsion spring 52 is nested with on the jointed shaft of handle 51, and its two ends link to each other with handle 52 with pedestal 1 respectively; Described tripping 62 is hinged on the end of movable contact plate 4, and U type connecting rod 53 1 ends link to each other with tripping 62, and the other end links to each other with handle 51; Described snap close 61 is hinged on the movable contact plate 4 and passes through the tripping mechanism synchronous interaction of gangbar 65 and circuit breaker, torsion spring 63 is installed on the movable contact plate 4, the one end compresses mutually with snap close 61 snap close 61 is cooperated with tripping 62 phase hooks all the time, the other end and movable contact plate 4 fix, described extension spring 64 is installed in movable contact plate 4 both sides, one end links to each other with movable contact plate 4, and the other end links to each other with pedestal 1; Because tripping 62 and snap close 61 all are hinged on the movable contact plate 4, when driving handle 51 rotations, the two ends of U type connecting rod 53 be on the same straight line with the jointed shaft of handle 51 and snap close 61 by torsion spring 63 all the time with tripping 62 roof pressure mutually, thereby make handle 51 and movable contact plate 4 form self-locking, so just can avoid movable contact plate 4 to automatically reset; Snap close 61 is by the tripping mechanism synchronous interaction of gangbar 65 with circuit breaker, like this when circuit breaker breaks down, when tripping mechanism orders about the circuit breaker disjunction, snap close 61 is separated with tripping 62, handle 51 is under the active force of reduction torsion spring 52 like this, drive movable contact plate 4 resets, thereby realizes the synchronous disjunction of synchronous auxiliary contact and circuit breaker; And respectively establish an extension spring 64 in movable contact plate 4 both sides, be convenient to handle 51 like this when ordering about movable contact plate 4 and swing, the movable contact spring 33 that guarantees both sides contact mechanism 3 and the contact performance of static contact 32 and also can improve the separating rate of movable contact plate 5 disjunction both sides contact mechanisms 3.
In the present embodiment, described movable contact plate 4 includes the first movable contact plate 41 and the second movable contact plate 42, the movable contact spring 33 that is equipped with 43, two groups of contact mechanisms 3 of draw-in groove at first, second movable contact plate 41,42 snaps in the draw-in groove 43 of first, second movable contact plate 41,42 respectively and the extension springs 64 of movable contact plate 4 both sides link to each other with first, second movable contact plate 41,42 respectively; Be provided with jointed shaft 11 in pedestal 1, be provided with axle sleeve 411 on the first movable contact plate 41, axle sleeve 411 is nested with on jointed shaft 11 and is hinged with pedestal 1, and snap close 61 is provided with through hole 611 and this through hole 611 and is nested with on axle sleeve 411 and is hinged with the first movable contact plate 41; Be provided with latch 421 at the second movable contact plate, 42 1 ends, this latch 421 inserts in the through hole 611 of snap closes 61 with the be hinged axis of the jointed shaft that makes the first movable contact plate 41, snap close 61 and the second movable contact plate 42 of snap close 61 and is in coaxial state; Certainly, for making the first movable contact plate 41, snap close 61 and the second movable contact plate 42 in same axis is hinged on pedestal 1, also can adopt alternate manner, such as the first movable contact plate 41, snap close 61 and the second movable contact plate 42 all can be nested with on this jointed shaft 11 prolongation of the jointed shaft in the pedestal 1, just can reach same purpose, but adopting this structure to be easy to processing, is preferred implementation therefore; Swing synchronously for making the second movable contact plate 42 and the first movable contact plate 41, be provided with block 422 at the second movable contact plate, 42 other ends, this block 422 be arranged on the first movable contact plate, 41 sidewalls on limiting stand 412 mutually spacing cooperations, by cooperating of block 422 and limiting stand 412, when the handle 51 drivings first movable contact plate 41 is swung to the right, block 422 can make the swing to the right synchronously of the second movable contact plate 42 and the first movable contact plate 41 under the driving of limiting stand 412, thereby when realizing one group of contact mechanism of disjunction 3, closed another group contact mechanism 3.
In the present embodiment, production and processing and assembling for handled easily mechanism 5, movable contact plate 4 and locking mechanism 6, the described first movable contact plate 41 is stepped to have both ends of the surface up and down, on the upper surface, be provided with the open slot 413 that communicates with the lower surface, torsion spring 63 and limiting stand 412 are arranged on the upper surface, axle sleeve 411 is fixed on the lower surface, tripping 62 is hinged with the lower surface, the relative end of tripping 62 hinged ends be provided be provided with on rectangular groove 621 and the sidewall hook 622, U type connecting rod 53 1 ends insert in the rectangular groove 621, and the other end links to each other with handle 51; On described snap close 61 outer walls, be provided with the feeler 612 and the guide vane end stop 613 of band barb 6121, the barb 6121 of feeler 612 blocks mutually with the hook 622 of tripping 62 makes snap close 61 with tripping 62 lockings, guide vane end stop 613 places in the open slot 413 and gangbar 65 is fixed on the guide vane end stop 613, the corresponding position that reaches cover plate 2 on the second movable contact plate 42 is provided with the deep-slotted chip breaker 423,21 that is complementary with gangbar 65 rotational trajectories, and the deep-slotted chip breaker 423,21 that gangbar 65 is passed the second movable contact plate 42 and cover plate 2 links to each other with the circuit breaker tripping machine mechanism; The first movable contact plate 41 is made as stepped, when such second movable contact plate 42 was hinged on the snap close 61, its end face can fit with the end face of the first movable contact plate 41, guarantees the job stability of the second movable contact plate 42; And trace 65 is being set on the snap close 61 and deep-slotted chip breaker 423,21 is set on the second movable contact plate 42 and cover plate 2, so synchronous auxiliary contact in use, the deep-slotted chip breaker 423,21 that gangbar 65 is passed on the second movable contact plate 42 and the cover plate 2 links to each other with the tripping mechanism of circuit breaker, when circuit breaker breaks down, tripping mechanism drives snap close 61 rotations by trace 65, the barb 6121 of snap close 61 feelers 612 is separated with the hook 622 of tripping 62, make synchronous auxiliary contact can with the synchronous disjunction of circuit breaker.
The foregoing description should not be considered as restriction of the present utility model, but any improvement of doing based on spirit of the present utility model, all should be within protection range of the present utility model.

Claims (4)

1. synchronous auxiliary contact, it comprises pedestal and cover plate, is respectively equipped with contact mechanism in the pedestal both sides, and contact mechanism includes two binding posts, static contact and movable contact springs, static contact is fixedlyed connected with one of them binding post, and movable contact spring one end and another binding post fix; It is characterized in that being provided with in described pedestal movable contact plate, operating mechanism and locking mechanism, the movable contact spring that the movable contact plate is hinged on pedestal and two groups of contact mechanisms links to each other with the movable contact plate respectively, is controlled the breaking and closing of two groups of contact mechanisms by the movable contact plate; Operating mechanism is installed in the pedestal and can orders about the movable contact plate in closed one group of contact mechanism, another group contact mechanism of disjunction with the operating grip synchronous interaction and the operating mechanism of circuit breaker; Locking mechanism is installed in the movable contact plate is in the lock state when ordering about the closed and disjunction of contact mechanism, and locking mechanism is in the tripping mechanism driving circuit breaker disjunction of circuit breaker, the contact mechanism of disjunction synchronously.
2. a kind of synchronous auxiliary contact according to claim 1, it is characterized in that described operating mechanism includes handle, reduction torsion spring and U type connecting rod, described locking mechanism includes snap close, tripping, torsion spring and extension spring, handle is hinged in the pedestal and reduction torsion spring is nested with on the jointed shaft of handle, and its two ends link to each other with handle with pedestal respectively; Described tripping is hinged on the end of movable contact plate, and U type connecting rod one end links to each other with tripping, and the other end links to each other with handle; Described snap close is hinged on the movable contact plate and the tripping mechanism synchronous interaction by gangbar and circuit breaker, torsion spring is installed on the movable contact plate, the one end compresses mutually with snap close snap close is cooperated with tripping phase hook all the time, the other end and movable contact plate fix, described extension spring is installed in movable contact plate both sides, one end links to each other with the movable contact plate, and the other end links to each other with pedestal.
3. a kind of synchronous auxiliary contact according to claim 1, it is characterized in that described movable contact plate includes the first movable contact plate and the second movable contact plate, be equipped with draw-in groove on first, second movable contact plate, the movable contact spring of two groups of contact mechanisms snaps in the draw-in groove of first, second movable contact plate respectively and the extension springs of movable contact plate both sides link to each other with first, second movable contact plate respectively; Be provided with jointed shaft in pedestal, be provided with axle sleeve on the first movable contact plate, axle sleeve is nested with on jointed shaft and is hinged with pedestal, and snap close is provided with through hole and this through hole and is nested with on axle sleeve and is hinged with the first movable contact plate; Be provided with latch at the second movable contact plate, one end, this latch inserts in the through hole of snap close and is hinged with snap close, is provided with block at the second movable contact plate other end, this block be arranged on the first movable contact plate sidewall on the mutually spacing cooperation of limiting stand.
4. a kind of synchronous auxiliary contact according to claim 3, it is characterized in that the described first movable contact plate is stepped has up and down both ends of the surface, on the upper surface, be provided with the open slot that communicates with the lower surface, torsion spring and guide vane end stop are arranged on the upper surface, axle sleeve is fixed on the lower surface, and tripping and lower surface are hinged, and is provided with on rectangular groove and the sidewall at the relative end of tripping hinged end and is provided with hook, U type connecting rod one end inserts in the rectangular groove, and the other end links to each other with handle; On described snap close outer wall, be provided with the feeler and the guide vane end stop of band barb, the barb of feeler blocks mutually with the hook of tripping makes snap close that tripping is locked, guide vane end stop places in the open slot, described gangbar is fixed on the guide vane end stop, the corresponding position that reaches cover plate on the second movable contact plate is provided with the deep-slotted chip breaker that is complementary with the gangbar rotational trajectory, and the deep-slotted chip breaker that gangbar is passed the second movable contact plate and cover plate links to each other with breaker tripping mechanism.
CN201020594525XU 2010-11-05 2010-11-05 Synchronous auxiliary contact Expired - Lifetime CN201838531U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201020594525XU CN201838531U (en) 2010-11-05 2010-11-05 Synchronous auxiliary contact

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201020594525XU CN201838531U (en) 2010-11-05 2010-11-05 Synchronous auxiliary contact

Publications (1)

Publication Number Publication Date
CN201838531U true CN201838531U (en) 2011-05-18

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Application Number Title Priority Date Filing Date
CN201020594525XU Expired - Lifetime CN201838531U (en) 2010-11-05 2010-11-05 Synchronous auxiliary contact

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CN (1) CN201838531U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104681368A (en) * 2015-03-17 2015-06-03 上海电科电器科技有限公司 Circuit breaker and automatic closing device thereof
CN104752113A (en) * 2015-03-11 2015-07-01 浙江天正电气股份有限公司 Electric switch for voltage electrical appliance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104752113A (en) * 2015-03-11 2015-07-01 浙江天正电气股份有限公司 Electric switch for voltage electrical appliance
CN104681368A (en) * 2015-03-17 2015-06-03 上海电科电器科技有限公司 Circuit breaker and automatic closing device thereof

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CX01 Expiry of patent term

Granted publication date: 20110518

CX01 Expiry of patent term