CN205542659U - Miniature circuit breaker - Google Patents
Miniature circuit breaker Download PDFInfo
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- CN205542659U CN205542659U CN201620114578.4U CN201620114578U CN205542659U CN 205542659 U CN205542659 U CN 205542659U CN 201620114578 U CN201620114578 U CN 201620114578U CN 205542659 U CN205542659 U CN 205542659U
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- connecting plate
- circuit breaker
- moving contact
- arc
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Abstract
The utility model discloses a miniature circuit breaker, including moving contact, static contact, explosion chamber and bimetallic strip to and be used for introducing the electric arc that produces between moving contact and the static contact run -on plate of explosion chamber, the moving contact is connected with bimetallic strip through first section flexible circuit conductor, and bimetallic strip's lower extreme is connected with terminal outgoing lines through first connecting plate, the moving contact passes through second section flexible circuit conductor to be connected with the second connecting plate, and the upper end of second connecting plate is connected with the upper end of run -on plate, and the lower extreme of second connecting plate is connected with terminal outgoing lines. The utility model discloses because the 2nd current path's shunting action, can improve miniature circuit breaker's current level greatly, the direction of current flow in bimetallic strip, second connecting plate and the run -on plate is unanimous basically to produce mutual superimposed striking magnetic field near the run -on plate, make the arc energy enter into the explosion chamber more fast, improved the arc extinguishing performance of circuit breaker, and can improve the performance of cut -offfing of circuit breaker.
Description
Technical field
This utility model relates to a kind of miniature circuit breaker.
Background technology
Miniature circuit breaker all comprises the assemblies such as moving contact, static contact and arc-chutes, in moving contact and static contact disjunction or Guan Bi
During, the air between moving contact and static contact can be produced electric arc by voltage breakdown, and arc-chutes are for by arc extinction.
Run-on tab introduces arc-chutes for the electric arc that will produce between moving contact and static contact.
Being typically provided overload protection arrangement in chopper, in miniature circuit breaker, conventional bimetal leaf is as overload protection arrangement, double
Sheet metal is generally connected between moving contact and binding post, is used for conducting electric current, when in chopper, electric current is excessive, and bimetallic
Sheet bends because of heating, thus drives circuit breaker tripping separating brake.Meanwhile, bimetal leaf is also connected with run-on tab, draws for generation
Magnetic field needed for conduction arc.
Such as Chinese utility model patent CN203967003U discloses a kind of Novel small-sized chopper, including housing, and arranges
The hot assembly of contact assembly, arc-chutes and tune in described housing；Described contact assembly includes moving contact and static contact；Described tune
Hot assembly includes bimetal leaf and run-on tab；Regulation screw is against the bottom of the hot assembly of described tune, and described run-on tab includes connecting successively
Striking portion, elastic joint part and the fixed part connect, described fixed part is connected with the bottom of described bimetal leaf；Described striking portion
For circular arc platy structure；Described static contact is provided with the arc leading angle of circular arc, and the lower section of described moving contact is provided with arc baffle；
It is provided with in described housing described in multiple electric arc introducing being beneficial to result between described moving contact and described static contact being arranged side by side
Striking passage in arc-chutes；The described striking passage of circular arc extends and institute away from one end of described moving contact and described static contact
That states arc-chutes enters at nock, and each striking passage is the most right with the arc passage of correspondence position；Described housing bottom is provided with two and is beneficial to
The electric arc of ejection from described arc-chutes is drained into row's arc passage of described hull outside.
But, above-mentioned miniature circuit breaker still suffers from following deficiency: one, in chopper whole electric currents will through bimetal leaf, and
Bimetal leaf has bigger resistance as a kind of heater element, therefore the raising of circuit breaker current grade can be caused restriction；Two,
Bimetal leaf is contrary with the sense of current of run-on tab disorder of internal organs, and the electromagnetic field of generation is cancelled out each other, and weakens the intensity in striking magnetic field,
The arc extinction performance making chopper is affected.
Utility model content
In order to overcome the drawbacks described above of prior art, the technical problems to be solved in the utility model be to provide a kind of arc extinction performance good,
The miniature circuit breaker that current class is high.
In order to solve above-mentioned technical problem, this utility model adopts the following technical scheme that a kind of miniature circuit breaker, including moving contact,
Static contact, arc-chutes and bimetal leaf, and the striking of the electric arc introducing arc-chutes for producing between moving contact and static contact
Plate；Described moving contact is connected with bimetal leaf by first paragraph flexible circuit conductor, and the first connecting plate and outlet are passed through in the lower end of bimetal leaf
Terminal connects；Described moving contact is connected by second segment flexible circuit conductor and the second connecting plate, the upper end of the second connecting plate and run-on tab
Upper end is connected, and the lower end of the second connecting plate is connected with outlet terminal.
Preferably, the described lower end of the second connecting plate is connected with the lower end of bimetal leaf, then by described first connecting plate and outlet
Terminal connects.
More preferably, the lower end of described second connecting plate, the lower end of the first connecting plate are respectively welded at the both sides of bimetal leaf lower end.
Preferably, described run-on tab be provided with increasing magnetic sheet further below.
Preferably, described static contact connects downwards arc leading angle, and the end of described arc leading angle extends to arc-chutes, described arc leading angle
And form striking passage between run-on tab.
Preferably, the middle part of a flexible circuit conductor is connected at the solder joint at the moving contact back side, the two ends of flexible circuit conductor respectively with double gold
Belong to sheet, the second connecting plate connects, and one section of flexible circuit conductor between described solder joint and bimetal leaf constitutes described first paragraph flexible circuit conductor, institute
The one section of flexible circuit conductor stated between solder joint and the second connecting plate constitutes described second segment flexible circuit conductor.
More preferably, the solder joint at the described moving contact back side is arranged over a rotation hole, and the top of rotation hole is provided with again a connecting hole, institute
That states rotation hole is arranged over a touch spring, and one end of touch spring is articulated in described connecting hole, another of touch spring
End is fixed on Shell of circuit breaker.
More preferably, described Shell of circuit breaker being fixed a hanging scroll, the other end of described touch spring is fixed on hanging scroll.
Preferably, the upper end of the second connecting plate and the upper end of run-on tab are positioned at the lower section of moving contact disjunction position.
Compared with prior art, miniature circuit breaker of the present utility model have the advantages that one, electric current from moving contact through double
Sheet metal constitutes the first current path to outlet terminal, and electric current constitutes the second electric current from moving contact through the second connecting plate to outlet terminal
Path, due to the shunting action of the second current path, can be greatly improved the current class of miniature circuit breaker；Two, bimetal leaf,
Electric current in second connecting plate and run-on tab the most substantially flows in top-down direction, and sense of current is basically identical, from
And near run-on tab, produce the striking magnetic field being overlapped mutually, electric arc can be produced higher magnetic blow-out effect, make arc energy more rapid
Enter in arc-chutes, improve the arc extinction performance of chopper, and the break performance of chopper can be improved.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of a kind of miniature circuit breaker of this utility model.
Fig. 2 is the schematic diagram after Fig. 1 removes Shell of circuit breaker.
Fig. 3 is flexible circuit conductor and moving contact, bimetal leaf, the annexation schematic diagram of the second connecting plate.
1, moving contact 2, static contact
3, arc-chutes 4, bimetal leaf
5, run-on tab the 6, first connecting plate
7, outlet terminal the 8, second connecting plate
9, magnetic sheet 10, connecting hole are increased
11, first paragraph flexible circuit conductor 12, second segment flexible circuit conductor
13, touch spring 14, hanging scroll
15, striking passage 16, solder joint
17, Shell of circuit breaker 18, arc leading angle
19, rotation hole 20, rotary shaft
Detailed description of the invention
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described in further detail.These embodiments are only used for
Bright this utility model, and be not limitation of the utility model.
In description of the present utility model, it should be noted that term " on ", the orientation of the instruction such as D score or position relationship be
Based on orientation shown in the drawings or position relationship, be for only for ease of description this utility model and simplify describe rather than instruction or
The device of hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
Restriction of the present utility model.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or dark
Show relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " is connected ", " even
Connect " should be interpreted broadly, connect for example, it may be fixing, it is also possible to be to removably connect, or be integrally connected；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal.For the ordinary skill in the art, can understand that above-mentioned term is in this reality as the case may be
With the concrete meaning in novel.
As shown in Figure 1 and Figure 2, a kind of miniature circuit breaker of the present utility model includes a Shell of circuit breaker 17, Shell of circuit breaker 17
Inside being provided with the moving contact 1 for realizing connecting and disconnecting of the circuit and static contact 2, the back position at static contact 2 is provided with for extinguishing electric arc
Arc-chutes 3, below moving contact 1 and static contact 2, be provided with run-on tab 5, run-on tab 5 is for by moving contact 1 and static contact 2
Between produce electric arc introduce arc-chutes 3.The bimetal leaf 4 for overload protection it is additionally provided with in Shell of circuit breaker 17, dynamic tactile
Being conductively connected by first paragraph flexible circuit conductor 11 between 1 and bimetal leaf 4, flexible circuit conductor does not interferes with the action of moving contact 1 and double
The deformation of sheet metal 4.The lower end of bimetal leaf 4 is connected with outlet terminal 7 by one first connecting plate 6, and electric current can be driven
Contact to outlet terminal, constitutes the first current path through bimetal leaf；Meanwhile, moving contact 1 also by second segment flexible circuit conductor 12 with
One second connecting plate 8 is conductively connected, and the lower end of the second connecting plate 8 is also connected with outlet terminal 7, and electric current is from moving contact 1 warp
Second connecting plate 8 constitutes the second current path to outlet terminal 7, and the second current path can play shunting action, improves small-sized
The current class of chopper.
As in figure 2 it is shown, a kind of preferred connected mode is to be connected with the lower end of bimetal leaf 4 lower end of the second connecting plate 8,
It is connected with outlet terminal 7 by described first connecting plate 6 again, preferably by the second connecting plate the 8, first connecting plate 6 and double gold
The lower end belonging to sheet 4 welds together, and the second connecting plate 8 and the first connecting plate 6 lay respectively at the both sides of bimetal leaf 4.
The upper end of the second connecting plate 8 is connected with the upper end of run-on tab 5, makes run-on tab 5 when by electric current, can produce magnetic
, electric arc is introduced arc-chutes 3.In order to strengthen striking effect, increase magnetic sheet 9 can arranging further below of run-on tab 5.It addition,
Described static contact 2 connects downwards has arc leading angle 18, the end of arc leading angle 18 to extend to arc-chutes 3, in arc leading angle 18 and striking
Form striking passage 15 between plate 5, be beneficial to the quick mobile of electric arc.The upper end that second connecting plate 8 is connected with run-on tab 5
It is preferably located at the lower section of moving contact 1 disjunction position, and close to moving contact, so can effectively stop that electric arc is to other direction
Motion, and electric arc is guided to arc-chutes 3.
In order to improve efficiency of assembling, above-mentioned first paragraph flexible circuit conductor 11 and second segment flexible circuit conductor 12 can be formed with a flexible circuit conductor,
As it is shown on figure 3, arrange a solder joint 16, by the centre of this root flexible circuit conductor at moving contact 1 back side (deviating from the one side of static contact 2)
Position is welded at solder joint 16, and the two ends of flexible circuit conductor are connected with bimetal leaf the 4, second connecting plate 8 respectively, solder joint 16 with
One section of flexible circuit conductor between bimetal leaf 4 constitutes described first paragraph flexible circuit conductor 11, between solder joint 16 and the second connecting plate 8
One section of flexible circuit conductor constitutes described second segment flexible circuit conductor 12.Solder joint 16 at moving contact 1 back side is arranged over a rotation hole 19, turns
Dynamic hole 19 coordinates with a rotary shaft 20 (see Fig. 2), makes moving contact 1 can rotate around rotary shaft 20.Rotation hole 19 upper
Side is provided with again a connecting hole 10, described rotation hole 19 be also arranged above a touch spring 13, one end of touch spring 13 hangs
Being connected in described connecting hole 10, the other end of touch spring 13 can be fixed on Shell of circuit breaker.Such as, as it is shown in figure 1,
A hanging scroll 14 can be fixed on Shell of circuit breaker 17, the other end of touch spring 13 is fixed on this hanging scroll 14.By
Lay respectively at the both sides up and down of rotation hole 19 in flexible circuit conductor and touch spring 13, them can be avoided to interfere when action or
Person causes flexible circuit conductor to be clamped by touch spring 13, and affects the normal work of chopper.
The above is only preferred implementation of the present utility model, it is noted that for those skilled in the art
For, on the premise of without departing from this utility model know-why, it is also possible to make some improvement and replacement, these improve and replace
Change and also should be regarded as protection domain of the present utility model.
Claims (9)
1. a miniature circuit breaker, including moving contact (1), static contact (2), arc-chutes (3) and bimetal leaf (4), Yi Jiyong
The run-on tab (5) of arc-chutes (3) is introduced in the electric arc that will produce between moving contact (1) and static contact (2)；Described moving contact
(1) being connected with bimetal leaf (4) by first paragraph flexible circuit conductor (11), the first connecting plate is passed through in the lower end of bimetal leaf (4)
(6) it is connected with outlet terminal (7)；It is characterized in that: described moving contact (1) is by second segment flexible circuit conductor (12) with second even
Fishplate bar (8) connects, and the upper end of the second connecting plate (8) is connected with the upper end of run-on tab (5), the second connecting plate (8)
Lower end is connected with outlet terminal (7).
2. miniature circuit breaker as claimed in claim 1, is characterized in that: the lower end of described second connecting plate (8) and bimetal leaf (4)
Lower end connect, then be connected with outlet terminal (7) by described first connecting plate (6).
3. miniature circuit breaker as claimed in claim 2, is characterized in that: the lower end of described second connecting plate (8), the first connecting plate
(6) lower end is respectively welded at the both sides of bimetal leaf (4) lower end.
4. miniature circuit breaker as claimed in claim 1, is characterized in that: being provided with further below of described run-on tab (5) increases magnetic sheet (9).
5. miniature circuit breaker as claimed in claim 1, is characterized in that: described static contact (2) connects downwards arc leading angle (18),
The end of described arc leading angle (18) extends to arc-chutes (3), forms striking between described arc leading angle (18) and run-on tab (5)
Passage (15).
6. miniature circuit breaker as claimed in claim 1, is characterized in that: the middle part of a flexible circuit conductor is connected to moving contact (1)
Solder joint (16) place at the back side, the two ends of flexible circuit conductor are connected with bimetal leaf (4), the second connecting plate (8) respectively, described solder joint
(16) one section of flexible circuit conductor and between bimetal leaf (4) constitutes described first paragraph flexible circuit conductor (11), described solder joint (16) with
One section of flexible circuit conductor between second connecting plate (8) constitutes described second segment flexible circuit conductor (12).
7. miniature circuit breaker as claimed in claim 6, is characterized in that: solder joint (16) top at described moving contact (1) back side sets
Having a rotation hole (19), the top of rotation hole (19) to be provided with again a connecting hole (10), the top of described rotation hole (19) sets
Having a touch spring (13), one end of touch spring (13) is articulated in described connecting hole (10), touch spring (13)
The other end be fixed on Shell of circuit breaker (17).
8. miniature circuit breaker as claimed in claim 7, is characterized in that: fix a hanging scroll (14) on described Shell of circuit breaker (17),
The other end of described touch spring (13) is fixed on hanging scroll (14).
9. miniature circuit breaker as claimed in claim 1, is characterized in that: the upper end of the second connecting plate (8) is upper with run-on tab (5)
End is positioned at the lower section of moving contact (1) disjunction position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114578.4U CN205542659U (en) | 2016-02-04 | 2016-02-04 | Miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620114578.4U CN205542659U (en) | 2016-02-04 | 2016-02-04 | Miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205542659U true CN205542659U (en) | 2016-08-31 |
Family
ID=56777073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620114578.4U Active CN205542659U (en) | 2016-02-04 | 2016-02-04 | Miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205542659U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393776A (en) * | 2017-08-24 | 2017-11-24 | 乐清市也为电气有限公司 | A kind of high-breaking miniature breaker |
-
2016
- 2016-02-04 CN CN201620114578.4U patent/CN205542659U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107393776A (en) * | 2017-08-24 | 2017-11-24 | 乐清市也为电气有限公司 | A kind of high-breaking miniature breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |