CN103681146A - Miniature circuit breaker - Google Patents
Miniature circuit breaker Download PDFInfo
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- CN103681146A CN103681146A CN201310671371.8A CN201310671371A CN103681146A CN 103681146 A CN103681146 A CN 103681146A CN 201310671371 A CN201310671371 A CN 201310671371A CN 103681146 A CN103681146 A CN 103681146A
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- circuit breaker
- miniature circuit
- bimetal leaf
- moving contact
- yoke
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Abstract
A miniature circuit breaker comprises a shell (7), a magnet yoke (4), a bimetallic strip (3) and a moving contact (6), wherein the magnet yoke (4), the bimetallic strip (3) and the moving contact (6) are arranged inside the shell (7), the magnet yoke (4) is U-shaped, an iron core and a coil (5) are arranged between two side plates of the magnet yoke, the iron core is sleeved with the coil, one end of the coil (5) is electrically connected with the bimetallic strip (3), and the other end of the coil (5) is electrically connected with the moving contact (6). The miniature circuit breaker is characterized in that the bimetallic strip (3) is arranged outside the magnet yoke (4) and is not connected with the magnet yoke (4), and the other end of the coil (5) is electrically connected with the side plate, close to the moving contact (6), of the magnet yoke (4). The miniature circuit breaker is beneficial to electric arc extinguishment, strong in breaking capacity, safe and reliable.
Description
Technical field
The present invention relates to low-voltage electrical technical field, specifically a kind of miniature circuit breaker.
Background technology
As shown in Figure 1, in existing circuit breaker (DZ47 platform series), bimetal leaf 3 is welded on the side plate inwall of yoke 4, and pad is positioned at the bottom of described bimetal leaf 3.Described yoke 4 is U-shaped, its base plate forms two frames 41 in the direction perpendicular to side plate, and described base plate forms from the side near moving contact 6 run-on tab 42 stretching out to described bimetal leaf 3 one sides are set, gapped between described run-on tab 42 and two described frames 41.Between two side plates of described yoke 4, be provided with coil 5, described coil 5 is electrically connected to by flexible connecting line 10 with described bimetal leaf 3 near one end of described bimetal leaf 3, and the other end is electrically connected to moving contact 6 by another flexible connecting line 10.
This circuit breaker is when moving contact generation electric arc separated with fixed contact, short circuit current is from the pad of described yoke 4 and described bimetal leaf 3, along two described frames 41, to the direction near described moving contact 6, advance, then redirect on described run-on tab 42 towards advancing away from the direction of described moving contact 6.This circuit breaker only electric current travel distance on described run-on tab 42 has moved positive interaction power to electric arc, effectively the travel distance of arc blow-out electric current is short, the arc blow-out electromagnetic force producing is limited, be unfavorable for arc extinction, and the advance part of electric current on two described frames 41, also can play the effect that stops electric arc to enter arc control device, weaken arc quenching effect, more be unfavorable for arc extinction, breaking capacity is poor, has potential safety hazard.
And, because being directly sheathed on iron core, described coil 5 do not have to fix, described coil 5 can move along the axial reciprocating of iron core, make circuit breaker can produce vibration in the course of the work, send noise, affect circuit breaker quality, and can affect Distribution of Magnetic Field because coil moves, the electromagnetic attraction that causes electromagnetic trip system to produce is unstable, makes the sensitivity of electromagnetic trip system lower.
In addition, in above-mentioned miniature circuit breaker, for regulating the bottom of the adjustment screw 1 of described bimetal leaf 3 and the described bimetal leaf 3 of the setting position of adjusting nut 8 distance far away, lower to the adjusting sensitivity of described bimetal leaf 3.
Summary of the invention
In order to solve the miniature circuit breaker of above prior art, be unfavorable for arc extinction, breaking capacity is poor, has the problem of potential safety hazard, thereby a kind of arc extinction, strong, safe and reliable miniature circuit breaker of breaking capacity of being conducive to is provided.
While further, providing a kind of coil working, can not send the miniature circuit breaker of noise, raising dropout action consistency; And a kind of miniature circuit breaker that can improve bimetal leaf adjusting sensitivity.
For solving above-mentioned prior art problem, the present invention is achieved by the following technical solutions:
A kind of miniature circuit breaker, comprise shell and be arranged at yoke, bimetal leaf and the moving contact in described shell, described yoke is U-shaped, between two side plate, be provided with iron core and be sheathed on the coil outside described iron core, one end of described coil is electrically connected to described bimetal leaf, and the other end is electrically connected to described moving contact; It is characterized in that: described bimetal leaf is arranged at outside described yoke and is not connected with described yoke, and the described other end of described coil is electrically connected to the side plate of described yoke near described moving contact.
In above-mentioned miniature circuit breaker, the described other end of described coil is electrically connected to the side plate upper end of described yoke near described moving contact.
In above-mentioned miniature circuit breaker, described yoke forms near the side plate upper end of described moving contact the hook portion that described moving contact stretches out dorsad, and the described other end of described coil is electrically connected to described hook portion.
In above-mentioned miniature circuit breaker, described coil is fixedly connected with described yoke in the one end near described moving contact.
In above-mentioned miniature circuit breaker, the bottom of described bimetal leaf is connected with terminal block by connector.
In above-mentioned miniature circuit breaker, the lower end position of described connector is lower than the lower end position of described bimetal leaf, and described connector arranges bimetal leaf governor motion on the position below described bimetal leaf lower end.
In above-mentioned miniature circuit breaker, described bimetal leaf governor motion comprises and takes shape in the screwed hole of described connector bottom and the adjustment screw coordinating with described screwed hole, and the blunt end of described adjustment screw props up described shell.
In above-mentioned miniature circuit breaker, described terminal block and described connector are one-body molded, and the thin thickness of terminal block described in the Thickness Ratio of described connector.
In above-mentioned miniature circuit breaker, described connector makes progress, is bent downwardly elongation moulding by described terminal block successively near one end of described bimetal leaf.
In above-mentioned miniature circuit breaker, described bimetal leaf and described moving contact are electrically connected to by flexible connecting line with the two ends of described coil respectively.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) miniature circuit breaker provided by the invention, wherein bimetal leaf is arranged at outside yoke and is not connected with yoke, and the other end of coil is electrically connected to the side plate of yoke near moving contact.Said structure is when moving contact generation electric arc separated with fixed contact, and by yoke, the side plate near moving contact starts short circuit current, along this side plate, marches to yoke base plate downwards, and electric current is advanced towards the side plate direction near bimetal leaf on base plate afterwards.Its effective arc blow-out electric current travel distance comprises all distances that electric current is advanced on side plate and base plate, and compared with prior art, the travel distance of arc blow-out electric current is long, and the arc blow-out electromagnetic force of generation is strong, is conducive to arc extinction, and breaking capacity is strong, safety and reliability.And above-mentioned design can not produce the electric current that stops electric arc to enter arc control device, further improves arc extinguishing ability.
(2) miniature circuit breaker provided by the invention, the other end of its coil is electrically connected to the side plate upper end of yoke near moving contact, makes full use of the height of side plate, increases as much as possible the travel distance of effective arc extinguishing electric current, the arc extinguishing electromagnetic force producing is many, and arc extinguishing ability is strong.
(3) miniature circuit breaker provided by the invention, wherein yoke forms near the side plate upper end of moving contact the hook portion that moving contact stretches out dorsad, this side plate is more easily electrically connected to coil, handled easily, and because hook portion has certain length, can increase the travel distance of arc extinguishing electric current to a certain extent, further improve arc extinguishing ability.
(4) miniature circuit breaker provided by the invention, its coil is fixedly connected with yoke in the one end near moving contact, makes coil when work, can not produce vibration, can not send noise, has improved the consistency that electromagnetic tripping apparatus is threaded off and moved.
(5) miniature circuit breaker provided by the invention, wherein the bottom of bimetal leaf is connected with terminal block by connector, terminal block and connector are one-body molded, and the thin thickness of the Thickness Ratio terminal block of connector, reduce number of welds, welding resistance is easily controlled, and welding operation difficulty is little, is conducive to the automated production of product.
(6) miniature circuit breaker provided by the invention, wherein arranges bimetal leaf governor motion on the position of connector below bimetal leaf lower end, due to the lower end of bimetal leaf governor motion near bimetal leaf, regulates highly sensitive.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the electromagnetic tripping apparatus of the middle-size and small-size circuit breaker of prior art and the structural representation of thermal release device;
Fig. 2 is the electromagnetic tripping apparatus of miniature circuit breaker of the present invention and the structural representation of thermal release device;
Fig. 3 is the cross-sectional schematic of miniature circuit breaker of the present invention.
In figure, Reference numeral is expressed as: 1-adjustment screw, 11-blunt end, 2-terminal block, 21-connector, 3-bimetal leaf, 4-yoke, 41-frame, 42-run-on tab, 43-hook portion, 5-coil, 6-moving contact, 7-shell, 8-adjusting nut, 9-magnetic conduction sheet, 10-flexible connecting line.
Embodiment
As shown in Figure 2, be the preferred embodiment of a kind of miniature circuit breaker of the present invention.Described miniature circuit breaker comprises shell 7 and is arranged at the parts that the conventional miniature circuit breakers such as yoke 4, bimetal leaf 3, moving contact 6, fixed contact and handle in described shell 7, operating mechanism all have, as shown in Figure 3.
Described yoke 4 is U-shaped, is provided with iron core and is sheathed on the coil 5 outside described iron core between two side plate.Described sheet metal 3 is electrically connected to one end of described coil 5; Described moving contact 6 is electrically connected to the other end of described coil 5, and in the present embodiment, described bimetal leaf 3 and described moving contact 6 are electrically connected to by flexible connecting line 10 with the two ends of described coil 5 respectively.Described coil 5 is fixedly connected with described yoke 4 in the one end near described moving contact 6.Above-mentioned connection all realizes by welding.
Described bimetal leaf 3 is arranged at outside described yoke 4 and is not connected with described yoke 4, and the described other end of described coil 5 is electrically connected to the side plate of described yoke 4 near described moving contact 6.
In the present embodiment, the described other end of described coil 5 is electrically connected to the side plate upper end of described yoke 4 near described moving contact 6.Preferably, described yoke 4 forms near the side plate upper end of described moving contact 6 hook portion 43 that described moving contact 6 stretches out dorsad, and the described other end of described coil 5 is electrically connected to described hook portion 43.
The bottom of described bimetal leaf 3 is connected with terminal block 2 by connector 21, described terminal block 2 is one-body molded with described connector 21, and the thin thickness of terminal block 2 described in the Thickness Ratio of described connector 21, described connector 21 makes progress, is bent downwardly elongation moulding by described terminal block 2 successively near one end of described bimetal leaf 3 in the present embodiment, in the present embodiment, described connector 21 employings are prolonged molded.
The lower end position of described connector 21 is lower than the lower end position of described bimetal leaf 3, and described connector 21 arranges bimetal leaf governor motion on the position below described bimetal leaf 3 lower ends.Described bimetal leaf governor motion comprises and takes shape in the screwed hole of described connector 21 bottoms and the adjustment screw 1 coordinating with described screwed hole, and the blunt end 11 of described adjustment screw 1 props up described shell 7.When regulating described bimetal leaf 3, adjustment screw 1 described in precession, rotate towards the direction near described yoke 4 on the top of described bimetal leaf 3, correspondingly, screws out described adjustment screw 1, and rotate towards the direction away from described yoke 4 on the top of described bimetal leaf 3.
Described miniature circuit breaker of the present invention is in disjunction short circuit current process, when electric arc enters arc control device, in electric arc front end yoke, long distance has the existence of electric current, and the electromagnetism having increased when electric arc enters arc control device blows power, be conducive to arc extinction, improve breaking capacity.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all execution modes.And the apparent variation of being extended out thus or change are still among the protection range in the invention.
Claims (10)
1. a miniature circuit breaker, comprise shell (7) and be arranged at yoke (4), bimetal leaf (3) and the moving contact (6) in described shell (7), described yoke (4) is U-shaped, between two side plate, be provided with iron core and be sheathed on the coil (5) outside described iron core, one end of described coil (5) is electrically connected to described bimetal leaf (3), and the other end is electrically connected to described moving contact (6); It is characterized in that: described bimetal leaf (3) is arranged at outside described yoke (4) and is not connected with described yoke (4), the described other end of described coil (5) is electrically connected to the side plate of described yoke (4) near described moving contact (6).
2. miniature circuit breaker according to claim 1, is characterized in that: the described other end of described coil (5) is electrically connected to the side plate upper end of described yoke (4) near described moving contact (6).
3. miniature circuit breaker according to claim 2, it is characterized in that: described yoke (4) forms near the side plate upper end of described moving contact (6) hook portion (43) that described moving contact (6) stretches out dorsad, and the described other end of described coil (5) is electrically connected to described hook portion (43).
4. according to the arbitrary described miniature circuit breaker of claim 1-3, it is characterized in that: described coil (5) is fixedly connected with described yoke (4) in the one end near described moving contact (6).
5. miniature circuit breaker according to claim 4, is characterized in that: the bottom of described bimetal leaf (3) is connected with terminal block (2) by connector (21).
6. miniature circuit breaker according to claim 5, it is characterized in that: the lower end position of described connector (21) is lower than the lower end position of described bimetal leaf (3), and described connector (21) arranges bimetal leaf governor motion at described bimetal leaf (3) on the position below lower end.
7. miniature circuit breaker according to claim 6, it is characterized in that: described bimetal leaf governor motion comprises and take shape in the screwed hole of described connector (21) bottom and the adjustment screw (1) coordinating with described screwed hole, the blunt end (11) of described adjustment screw (1) props up described shell (7).
8. miniature circuit breaker according to claim 7, is characterized in that: described terminal block (2) is one-body molded with described connector (21), and the thin thickness of terminal block (2) described in the Thickness Ratio of described connector (21).
9. miniature circuit breaker according to claim 8, is characterized in that: described connector (21) makes progress, is bent downwardly elongation moulding successively by one end of the close described bimetal leaf (3) of described terminal block (2).
10. miniature circuit breaker according to claim 9, is characterized in that: described bimetal leaf (3) and described moving contact (6) are electrically connected to by flexible connecting line (10) with the two ends of described coil (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671371.8A CN103681146B (en) | 2013-12-10 | 2013-12-10 | A kind of miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671371.8A CN103681146B (en) | 2013-12-10 | 2013-12-10 | A kind of miniature circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103681146A true CN103681146A (en) | 2014-03-26 |
| CN103681146B CN103681146B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310671371.8A Active CN103681146B (en) | 2013-12-10 | 2013-12-10 | A kind of miniature circuit breaker |
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| Country | Link |
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| CN (1) | CN103681146B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900456A (en) * | 2015-05-06 | 2015-09-09 | 温州高能电气有限公司 | Moulded case circuit breaker and tripping mechanism thereof |
| CN107978497A (en) * | 2017-12-28 | 2018-05-01 | 高锦 | A kind of plug-in switch module for miniature circuit breaker |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86105712A (en) * | 1985-07-31 | 1987-04-08 | 默林·格伦 | The switchette of band multiple moving contacts and thermo magnetic trip release |
| EP0143022B1 (en) * | 1983-10-21 | 1988-06-01 | Merlin Gerin | Thermal and magnetic circuit breaker tripping mechanism |
| CN1108000A (en) * | 1994-02-10 | 1995-09-06 | 松下电工株式会社 | A circuit breaker |
| EP0849761A2 (en) * | 1996-12-20 | 1998-06-24 | ABBPATENT GmbH | Overcurrent and short circuit trip device for an electric circuit breaker |
| JP2000251606A (en) * | 1999-02-26 | 2000-09-14 | Nitto Electric Works Ltd | Circuit breaker for wiring |
| CN201478231U (en) * | 2009-08-06 | 2010-05-19 | 长城电器集团有限公司 | Novel thermo-magnetic system of miniature circuit breaker |
| CN102543603A (en) * | 2012-01-20 | 2012-07-04 | 浙江鼎威科技有限公司 | Ultrathin minitype breaker |
| CN203573921U (en) * | 2013-12-10 | 2014-04-30 | 德力西电气有限公司 | Miniature breaker |
-
2013
- 2013-12-10 CN CN201310671371.8A patent/CN103681146B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143022B1 (en) * | 1983-10-21 | 1988-06-01 | Merlin Gerin | Thermal and magnetic circuit breaker tripping mechanism |
| CN86105712A (en) * | 1985-07-31 | 1987-04-08 | 默林·格伦 | The switchette of band multiple moving contacts and thermo magnetic trip release |
| CN1108000A (en) * | 1994-02-10 | 1995-09-06 | 松下电工株式会社 | A circuit breaker |
| EP0849761A2 (en) * | 1996-12-20 | 1998-06-24 | ABBPATENT GmbH | Overcurrent and short circuit trip device for an electric circuit breaker |
| JP2000251606A (en) * | 1999-02-26 | 2000-09-14 | Nitto Electric Works Ltd | Circuit breaker for wiring |
| CN201478231U (en) * | 2009-08-06 | 2010-05-19 | 长城电器集团有限公司 | Novel thermo-magnetic system of miniature circuit breaker |
| CN102543603A (en) * | 2012-01-20 | 2012-07-04 | 浙江鼎威科技有限公司 | Ultrathin minitype breaker |
| CN203573921U (en) * | 2013-12-10 | 2014-04-30 | 德力西电气有限公司 | Miniature breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900456A (en) * | 2015-05-06 | 2015-09-09 | 温州高能电气有限公司 | Moulded case circuit breaker and tripping mechanism thereof |
| CN107978497A (en) * | 2017-12-28 | 2018-05-01 | 高锦 | A kind of plug-in switch module for miniature circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103681146B (en) | 2016-08-17 |
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