CN103681146B - A kind of miniature circuit breaker - Google Patents
A kind of miniature circuit breaker Download PDFInfo
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- CN103681146B CN103681146B CN201310671371.8A CN201310671371A CN103681146B CN 103681146 B CN103681146 B CN 103681146B CN 201310671371 A CN201310671371 A CN 201310671371A CN 103681146 B CN103681146 B CN 103681146B
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- yoke
- circuit breaker
- bimetal leaf
- miniature circuit
- moving contact
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Abstract
A kind of miniature circuit breaker, yoke (4), bimetal leaf (3) and the moving contact (6) including shell (7) and being arranged in described shell (7), described yoke (4) is U-shaped, iron core and the coil (5) being sheathed on outside described iron core it is provided with between two side plate, one end of described coil (5) electrically connects with described bimetal leaf (3), and the other end electrically connects with described moving contact (6)；It is characterized in that: described bimetal leaf (3) is arranged at described yoke (4) and is connected outward and not with described yoke (4), the described other end of described coil (5) electrically connects near the side plate of described moving contact (6) with described yoke (4).The miniature circuit breaker of the present invention, beneficially arc extinction, breaking capacity are strong, 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 it is 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 on the direction be perpendicular to side plate, and described base plate is from arranging the run-on tab 42 that described bimetal leaf 3 side is stretched out near the side molding of moving contact 6 is oriented, has gap between described run-on tab 42 and two described frames 41.Being provided with coil 5 between two side plates of described yoke 4, described coil 5 is electrically connected 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 with moving contact 6 by another flexible connecting line 10.
This chopper is when moving contact separates generation electric arc with static contact, short circuit current is from described yoke 4 with the pad of described bimetal leaf 3, advance near the direction of described moving contact 6 along two described frames 41, then turn to advance towards the direction away from described moving contact 6 on described run-on tab 42.Electric arc has been moved positive force by this chopper only electric current travel distance on described run-on tab 42, the effectively travel distance of arc blow-out electric current is short, the arc blow-out electromagnetic force produced is limited, it is unfavorable for arc extinction, and the traveling part that electric current is on two described frames 41, also can play the effect stoping electric arc to enter arc-chutes, weaken arc quenching effect, more being unfavorable for arc extinction, breaking capacity is poor, there is potential safety hazard.
And, owing to described coil 5 is directly sleeved on iron core the most fixing, described coil 5 can move along the axial reciprocating of iron core, make chopper can produce vibration in the course of the work, send noise, affect circuit breaker quality, and Distribution of Magnetic Field can be affected owing to coil moves, the electromagnetic attraction causing electromagnetic tripping system to produce is unstable, and the sensitivity making electromagnetic tripping system is relatively low.
It addition, in above-mentioned miniature circuit breaker, arranging the bottom of bimetal leaf 3 described in positional distance farther out for regulate the regulation screw 1 of described bimetal leaf 3 and adjusting nut 8, the regulation sensitivity to described bimetal leaf 3 is relatively low.
Summary of the invention
Being unfavorable for arc extinction to solve the miniature circuit breaker of above prior art, breaking capacity is poor, the problem that there is potential safety hazard, thus provides a kind of miniature circuit breaker being conducive to arc extinction, breaking capacity strong, safe and reliable.
Further, it is provided that noise will not be sent during a kind of coil working, improve the conforming miniature circuit breaker of trip action；And a kind of can improve to bimetal leaf regulation sensitivity miniature circuit breaker.
For solving above-mentioned prior art problem, the present invention is achieved by the following technical solutions:
A kind of miniature circuit breaker, including shell and be arranged at the yoke in described shell, bimetal leaf and moving contact, described yoke is U-shaped, iron core and the coil being sheathed on outside described iron core it is provided with between two side plate, one end of described coil electrically connects with described bimetal leaf, and the other end electrically connects with 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 electrically connects near the side plate of described moving contact with described yoke.
In above-mentioned miniature circuit breaker, the described other end of described coil electrically connects near the side plate upper end of described moving contact with described yoke.
In above-mentioned miniature circuit breaker, described yoke forms, near the side plate upper end of described moving contact, the hook portion that the most described moving contact stretches out, and the described other end of described coil electrically connects with described hook portion.
In above-mentioned miniature circuit breaker, described coil is connected fixing with described yoke near one end of described moving contact.
In above-mentioned miniature circuit breaker, the bottom of described bimetal leaf is connected with patch panel by connector.
In above-mentioned miniature circuit breaker, the lower end position of described connector is less than the lower end position of described bimetal leaf, and described connector arranges bimetal leaf governor motion in the position below of described bimetal leaf lower end.
In above-mentioned miniature circuit breaker, described bimetal leaf governor motion includes the screwed hole taking shape in described connector bottom and the regulation screw coordinated with described screwed hole, and the blunt end of described regulation screw props up described shell.
In above-mentioned miniature circuit breaker, described patch panel is one-body molded with described connector, and the thickness of described connector is thinner than the thickness of described patch panel.
In above-mentioned miniature circuit breaker, described connector by described patch panel near one end of described bimetal leaf the most upwards, be bent downwardly elongation moulding.
In above-mentioned miniature circuit breaker, described bimetal leaf and described moving contact two ends with described coil respectively are electrically connected by flexible connecting line.
The technique scheme of the present invention has the advantage that compared to existing technology
(1) miniature circuit breaker that the present invention provides, outside wherein bimetal leaf is arranged at yoke and is not connected with yoke, and the other end of coil electrically connects near the side plate of moving contact with yoke.Said structure when moving contact separates generation electric arc with static contact, short circuit current by yoke near the side plate of moving contact, progress down to yoke base plate along this side plate, after current advance towards near the side plate direction of bimetal leaf on base plate.Its effective arc blow-out electric current travel distance includes 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, beneficially arc extinction, and breaking capacity is strong, safety and reliability.And, above-mentioned design will not produce the electric current stoping electric arc to enter arc-chutes, improves arc extinguishing ability further.
(2) miniature circuit breaker that the present invention provides, the other end of its coil electrically connects near the side plate upper end of moving contact with yoke, makes full use of the height of side plate, increases the travel distance of effective arc extinguishing electric current as much as possible, the arc extinguishing electromagnetic force produced is many, and arc extinguishing ability is strong.
(3) miniature circuit breaker that the present invention provides, wherein yoke forms, near the side plate upper end of moving contact, the hook portion that moving contact dorsad stretches out, this side plate is made to be easier to electrically connect with coil, convenient operation, and owing to hook portion has certain length, the travel distance of arc extinguishing electric current can be increased to a certain extent, improve arc extinguishing ability further.
(4) miniature circuit breaker that the present invention provides, its coil is connected fixing with yoke near one end of moving contact, makes coil operationally will not produce vibration, will not send noise, improve the concordance of electromagnetic tripping apparatus trip action.
(5) miniature circuit breaker that the present invention provides, wherein the bottom of bimetal leaf is connected with patch panel by connector, patch panel is one-body molded with connector, and the thickness of connector is thinner than the thickness of patch panel, reduce number of welds, welding kesistance is easily controlled, and welding operation difficulty is little, beneficially the automated production of product.
(6) miniature circuit breaker that the present invention provides, wherein connector arranges bimetal leaf governor motion in the position below of bimetal leaf lower end, owing to bimetal leaf governor motion is near the lower end of bimetal leaf, regulates highly sensitive.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is electromagnetic tripping apparatus and the structural representation of thermal release device of the middle-size and small-size chopper of prior art；
Fig. 2 is electromagnetic tripping apparatus and the structural representation of thermal release device of miniature circuit breaker of the present invention；
Fig. 3 is the cross-sectional schematic of miniature circuit breaker of the present invention.
In figure, reference is expressed as: 1-regulates screw, 11-blunt end, 2-patch panel, 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.
Detailed description of the invention
As in figure 2 it is shown, be the preferred embodiment of a kind of miniature circuit breaker of the present invention.Described miniature circuit breaker includes shell 7 and is arranged at the parts that the yoke 4 in described shell 7, bimetal leaf 3, moving contact 6, static contact and the Conventional compact chopper such as handle, operating mechanism are respectively provided with, as shown in Figure 3.
Described yoke 4 is U-shaped, is provided with iron core and the coil 5 being sheathed on outside described iron core between two side plate.Described sheet metal 3 electrically connects with one end of described coil 5；Described moving contact 6 electrically connects with the other end of described coil 5, and in the present embodiment, described bimetal leaf 3 and described moving contact 6 are electrically connected by flexible connecting line 10 with the two ends of described coil 5 respectively.Described coil 5 is connected fixing with described yoke 4 near one end of described moving contact 6.Above-mentioned connection is all realized 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 electrically connects near the side plate of described moving contact 6 with described yoke 4.
In the present embodiment, the described other end of described coil 5 electrically connects near the side plate upper end of described moving contact 6 with described yoke 4.Preferably, described yoke 4 forms the hook portion 43 that the most described moving contact 6 stretches out near the side plate upper end of described moving contact 6, and the described other end of described coil 5 electrically connects with described hook portion 43.
The bottom of described bimetal leaf 3 is connected with patch panel 2 by connector 21, described patch panel 2 is one-body molded with described connector 21, and the thickness of described connector 21 is thinner than the thickness of described patch panel 2, the most described connector 21 by described patch panel 2 near one end of described bimetal leaf 3 the most upwards, be bent downwardly elongation moulding, in the present embodiment, the employing of described connector 21 is prolonged molded.
The lower end position of described connector 21 is less than the lower end position of described bimetal leaf 3, and described connector 21 arranges bimetal leaf governor motion in the position below of described bimetal leaf 3 lower end.Described bimetal leaf governor motion includes the screwed hole taking shape in described connector 21 bottom and the regulation screw 1 coordinated with described screwed hole, and the blunt end 11 of described regulation screw 1 props up described shell 7.When regulating described bimetal leaf 3, regulating screw 1 described in precession, the top of described bimetal leaf 3 rotates towards near the direction of described yoke 4, correspondingly, screws out described regulation screw 1, and the top of described bimetal leaf 3 rotates towards the direction away from described yoke 4.
The described miniature circuit breaker of the present invention is during disjunction short circuit current, and when electric arc enters arc-chutes, in the yoke of electric arc front end, relatively long distance has the existence of electric current, adds electromagnetism blowing force during electric arc entrance arc-chutes, beneficially arc extinction, improves breaking capacity.
Obviously, above-described embodiment is only for clearly demonstrating example, and not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the obvious change thus extended out or variation still in the protection domain of the invention among.
Claims (8)
1. a miniature circuit breaker, the yoke (4) including shell (7) and being arranged in described shell (7),
Bimetal leaf (3) and moving contact (6), described yoke (4) is U-shaped, arranges between two side plate
Coil (5) that is cored and that be sheathed on outside described iron core, one end of described coil (5) and described bimetallic
Sheet (3) electrically connects, and the other end electrically connects with described moving contact (6)；It is characterized in that: described double gold
Genus sheet (3) is arranged at described yoke (4) and is connected outward and not with described yoke (4), described coil (5)
The described other end and described yoke (4) electrically connect near the side plate of described moving contact (6)；
The bottom of described bimetal leaf (3) is connected with patch panel (2) by connector (21)；
The lower end position of described connector (21) is less than the lower end position of described bimetal leaf (3), described connection
Part (21) arranges bimetal leaf governor motion in the position below of described bimetal leaf (3) lower end；
Described patch panel (2) is one-body molded with described connector (21).
Miniature circuit breaker the most according to claim 1, it is characterised in that: described coil (5) described another
Hold and electrically connect near the side plate upper end of described moving contact (6) with described yoke (4).
Miniature circuit breaker the most according to claim 2, it is characterised in that: described yoke (4) is near described dynamic
The side plate upper end of contact (6) forms the hook portion (43) that the most described moving contact (6) stretches out, described
The described other end of coil (5) electrically connects with described hook portion (43).
4. according to the arbitrary described miniature circuit breaker of claim 1-3, it is characterised in that: described coil (5) is leaning on
One end of nearly described moving contact (6) is fixing with described yoke (4) to be connected.
Miniature circuit breaker the most according to claim 1, it is characterised in that: described bimetal leaf governor motion bag
Include the screwed hole taking shape in described connector (21) bottom and the regulation screw coordinated with described screwed hole
(1), the blunt end (11) of described regulation screw (1) props up described shell (7).
Miniature circuit breaker the most according to claim 1, it is characterised in that: the thickness of described connector (21)
Thinner than the thickness of described patch panel (2).
Miniature circuit breaker the most according to claim 1, it is characterised in that: described connector (21) is by described
Patch panel (2) near described bimetal leaf (3) one end the most upwards, be bent downwardly elongation moulding.
Miniature circuit breaker the most according to claim 1, it is characterised in that: described bimetal leaf (3) and described
Moving contact (6) is electrically connected 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 CN103681146A (en) | 2014-03-26 |
| CN103681146B true 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) |
Families Citing this family (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 (7)
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|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3698394B2 (en) * | 1999-02-26 | 2005-09-21 | 日東工業株式会社 | Circuit breaker for wiring |
-
2013
- 2013-12-10 CN CN201310671371.8A patent/CN103681146B/en active Active
Patent Citations (7)
| 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 |
| 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 |
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|---|---|
| CN103681146A (en) | 2014-03-26 |
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