CN205582864U - Miniature circuit breaker - Google Patents
Miniature circuit breaker Download PDFInfo
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- CN205582864U CN205582864U CN201620179564.0U CN201620179564U CN205582864U CN 205582864 U CN205582864 U CN 205582864U CN 201620179564 U CN201620179564 U CN 201620179564U CN 205582864 U CN205582864 U CN 205582864U
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- arc
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Abstract
The utility model relates to a miniature circuit breaker, including casing, moving contact, static contact bimetallic strip, arc control device and arc initiation device, arc initiation device goes up the run -on plate and forms the striking passageway down between the run -on plate including relative last run -on plate that sets up and lower run -on plate, it is connected with the static contact electricity to go up the upper end of run -on plate, the upper end of run -on plate is connected with the moving contact electricity down, an elasticity reed is buckled into downwards to the run -on plate upper end down, elasticity reed upper end is fixed, and the lower extreme of elasticity reed is the free end, bimetallic strip's the lower extreme and the lower extreme of elasticity reed are connected. Like this, elasticity reed lower extreme can elastic deformation and is compressed tightly the bimetallic strip lower extreme, compare with miniature circuit breaker's among the prior art the structure that corresponds, the utility model discloses a miniature circuit breaker no longer need use pressure spring, and simple structure has reduced part quantity, reduces installation steps, reduce cost.
Description
Technical field
This utility model relates to a kind of miniature circuit breaker, particularly to a kind of miniature circuit breaker with arc initiation device.
Background technology
Miniature circuit breaker is typically provided arc-control device, arc initiation device and bimetallic trip gear, such as Application No.:
201320707903.4 a kind of miniature circuit breaker described in Chinese patent application, the bimetallic in bimetal leaf trip gear
Sheet one end is connected with the moving contact of chopper, and one end is connected with outlet terminal, owing to bimetal leaf can not load the biggest electric current,
So in the chopper that some load currents are bigger, be also connected between moving contact with outlet terminal a shunting connecting plate in order to
Improve the load current of chopper.Also having arc initiation device in chopper, arc initiation device includes run-on tab and lower run-on tab, on
Forming striking passage between run-on tab and lower run-on tab, the electric arc produced when the dynamic and static contact of chopper separates is by striking passage
Enter into arc-control device.In existing chopper, it is usually and uses a sheet metal as shunting connecting plate, shunting is connected
The upper end of plate welds together with the upper end of lower run-on tab, and the lower end of elastic spring is fixed together with the lower end of bimetal leaf,
Welding procedure is relative complex, it is difficult to construction, so adding cost.Regulation screw it is typically provided, regulation on Shell of circuit breaker
Bimetal leaf lower end is located at by screw, regulation screw from bimetal leaf side, bimetal leaf is held out against to shunting connecting plate side with
Adjust bimetal leaf position, be provided with a holddown spring at elastic spring lower end position, holddown spring by elastic spring to double gold
Belong to sheet one side compression, such holddown spring and regulation screw to compress from both sides by the lower end of flow distribution plate with bimetal leaf.Regulation spiral shell
Nail is for regulating the location status of bimetal leaf, and holddown spring is used for bimetal leaf and regulates screw in compression and make bimetal leaf
Recover after a deformation to initial position.In above-mentioned miniature circuit breaker, lower run-on tab is that split is welded even with shunting connecting plate
Connecing, structure is complicated, and welding operating difficulties, welding quality is difficult to ensure that, and also needs to use compression at bimetal leaf lower end
Spring, part is more, and reliability is the highest.
Utility model content
In order to solve defect of the prior art, this utility model provides a kind of miniature circuit breaker, and design of part is simple, one-tenth
This is relatively low.
In order to achieve the above object and relevant purpose, a kind of miniature circuit breaker of the present utility model uses following technical side
Case: a kind of miniature circuit breaker, including housing, moving contact, static contact bimetal leaf, arc-control device and arc initiation device；Described striking
Device includes upper run-on tab and lower run-on tab, the formation striking passage between upper run-on tab and lower run-on tab being oppositely arranged；Described
The upper end of upper run-on tab electrically connects with static contact, and the upper end of described lower run-on tab electrically connects with moving contact；Lower run-on tab upper end to
Under be bent into an elastic spring, described elastic spring upper end is fixed, and the lower end of elastic spring is free end, described bimetal leaf
Lower end is connected with the lower end of elastic spring.
Preferably, the lower end of described bimetal leaf is welded on elastic spring lower end.
Preferably, described housing is provided with a regulation screw, and regulation screw is by bimetal leaf and the lower end of elastic spring
It is tightly pressed together.
Preferably, an auxiliary run-on tab extended along lower run-on tab it is provided with below described lower run-on tab, on auxiliary run-on tab
End electrically connects with lower run-on tab upper end, and other positions of auxiliary run-on tab do not contact with lower run-on tab.
Preferably, described case inside wall be provided with lower run-on tab locating slot and auxiliary run-on tab locating slot, described under draw
The side of arc plate is inserted in lower run-on tab locating slot, and the side of described auxiliary run-on tab is inserted in auxiliary run-on tab locating slot.
Preferably, the upper end of described lower run-on tab is provided with a connecting hole, and the upper end of described auxiliary run-on tab is overlapped in connecting hole.
Preferably, described upper run-on tab, lower run-on tab and auxiliary run-on tab are mild steel or ferrum.
Further, described upper run-on tab includes connecting portion, pars intermedia and the afterbody being sequentially connected with；Connecting portion and static contact
Connecting, afterbody extends to arc-control device；The entrance of striking passage it is respectively between connecting portion, pars intermedia, afterbody and lower run-on tab
Section, changeover portion, outlet section；The width of the changeover portion of described striking passage is maintained at 8mm to 9.5mm.
Further, the length of pars intermedia is not less than 5mm.
Further, the entrance width of described striking passage is more than transition width, and from entrance to changeover portion width
Degree is gradually reduced.
Further, the outlet section width of described striking passage is more than transition width, and from changeover portion to outlet section width
Degree is gradually increased.
Based on technique scheme, a kind of miniature circuit breaker of the present utility model has the advantages that lower run-on tab
Upper end is turned under being converted into elastic spring；On the one hand, elastic spring and lower run-on tab are integrative-structures, and simple in construction can be by metal
Plate bending and molding, eliminates the welding sequence at lower run-on tab Yu elastic spring upper end；On the other hand, elastic spring itself has
Elasticity, the upper end of elastic spring is fixed, and is equivalent to a spring, is compressed bimetal leaf lower end, it is possible to regulation bimetal leaf
Position, thus regulate the time of overlond trip, compared with prior art, double in a kind of miniature circuit breaker of the present utility model
Sheet metal lower end need not use holddown spring, thus can reduce number of parts, make miniature circuit breaker of the present utility model tie
Structure is simple, reduces installation steps, reduces cost.
Accompanying drawing explanation
Fig. 1 is shown as the schematic perspective view of a kind of miniature circuit breaker of the present utility model, removes the housing of side.
Fig. 2 is shown as the internal structure schematic diagram of a kind of miniature circuit breaker of the present utility model, and housing is all removed.
Fig. 3 is shown as the structural relation schematic diagram of moving contact, static contact and arc initiation device.
Fig. 4 is shown as the structural representation of run-on tab.
Fig. 5 is shown as lower arc striking piece, the annexation schematic diagram of auxiliary arc striking piece.
Lower run-on tab locating slot that Fig. 6 is shown as on Shell of circuit breaker, the structural representation of auxiliary run-on tab locating slot.
Reference
1 housing 511 connecting portion
11 regulation screw 512 pars intermedias
12 input terminal 513 afterbodys
13 outlet terminal 52 times run-on tabs
14 times run-on tab locating slot 521 elastic springs
15 auxiliary run-on tab locating slot 522 connecting holes
21 moving contact 53 striking passages
22 static contact 531 entrances
31 bimetal leaf 532 changeover portions
4 arc-control device 533 outlet sections
5 arc initiation devices 54 assist run-on tab
Run-on tab 6 tripping mechanism on 51
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
For this utility model is described, and it is not limitation of the utility model.
In description of the present utility model, it should be noted that term " " center ", " longitudinally ", " laterally ", " on ", D score,
Orientation or the position relationship of the instruction such as "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplifies description rather than instruction
Hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be not understood that
For to restriction of the present utility model.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or
Hint relative importance.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", should be interpreted broadly " being connected ", " connection ", for example, it may be fix connection, it is also possible to be to removably connect, or integratedly
Connect；Can be to be 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,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Language concrete meaning in this utility model.
Additionally, in description of the present utility model, except as otherwise noted, " multiple " are meant that two or more.
Fig. 1 is shown as the schematic perspective view of a kind of miniature circuit breaker of the present utility model, removes the housing 1 of side, and Fig. 2 shows
Being shown as the internal structure schematic diagram of a kind of miniature circuit breaker of the present utility model, housing is all removed；As depicted in figs. 1 and 2, little
Type chopper include housing 1, housing 1 is provided with moving contact 21, static contact 22, arc-control device 4, arc initiation device 5 and bimetallic
Sheet 31, static contact 22 is connected with input terminal 12, and moving contact 21 is connected with bimetal leaf 31 by flexible circuit conductor, bimetal leaf 31 and
Outlet terminal 13 connects, and when the electric current in chopper is excessive, bimetal leaf 31 generates heat and is deformed, and triggers the de-of chopper
Buckle mechanism 6 action, makes moving contact 21 and static contact 22 separately；Upper run-on tab 51 that arc initiation device 5 includes being oppositely arranged and under draw
Arc plate 52, forms striking passage 53, moving contact 21 and static contact 22 and produces when separating between upper run-on tab 51 and lower run-on tab 52
Electric arc be directed to arc-control device 4 and extinguish by striking passage 53；The upper end of upper run-on tab 51 electrically connects with static contact 22, under
The upper end of run-on tab 52 is electrically connected with moving contact 21 by flexible circuit conductor；Lower run-on tab 52 upper end is turned under being converted into an elastic spring
521, elastic spring 521 upper end is fixed, and the lower end of elastic spring 521 is free end, the lower end of bimetal leaf 31 and elastic spring
The lower end of 521 connects；So, elastic spring 521 lower end is resiliently flexible, is equivalent to a spring, it be arranged on double gold
The regulation screw 11 belonging to sheet 31 opposite side acts on jointly, can regulate the position of bimetal leaf 31, thus regulate overlond trip
Time, so, compared with the counter structure of miniature circuit breaker of the prior art, miniature circuit breaker of the present utility model no longer needs
Holddown spring to be used, simple in construction, decrease number of parts, reduce installation steps, reduce cost；And it is of the present utility model
Elastic spring in miniature circuit breaker 521 and lower run-on tab 52 are integrative-structures, simple in construction, can by sheet metal bent molding,
Eliminate at lower run-on tab 52 and the welding sequence of elastic spring 521 upper end, this reduces the manufacturing cost of chopper.
As in figure 2 it is shown, the lower end of the lower end of bimetal leaf 31 and elastic spring 521 links together, bimetal leaf 31
Lower end can be fixed with the lower end of elastic spring 521 and be connected, such as can be by the lower end of bimetal leaf 31 and elastic spring 521
Lower end welds together；Together with the lower end of bimetal leaf 31 can also be connected to the lower end of elastic spring 521, regulate screw 11
From bimetal leaf 31 side, bimetal leaf 31 is held out against to elastic spring 521 side, by bimetal leaf 31 and elastic spring 521
Lower end is tightly pressed together.In miniature circuit breaker of the present utility model, lower run-on tab 52 upper end is connected with moving contact 21, elastic spring
The upper end of sheet 521 is connected with the upper end of lower run-on tab 52, and the upper end of bimetal leaf 31 is connected with moving contact 21, and lower run-on tab
52, elastic spring 521, bimetal leaf 31 are the most all in from up to down extending, so, lower run-on tab 52, elastic spring 521, double
Sense of current in sheet metal 31 is roughly the same, it is possible to strengthen self-excitation magnetic field, more preferable to the magnetic blow-out effect of electric arc, beneficially electric arc
Extinguishing, improve the arc extinguishing ability of chopper.In order to further enhance self-excitation magnetic field, as shown in Figure 3 and Figure 5, it is also possible to
One piece of auxiliary run-on tab 54 extended along lower run-on tab 52, auxiliary run-on tab 54 upper end and lower striking are set below lower run-on tab 52
Plate 52 upper end electrically connects, and other positions of auxiliary run-on tab 54 do not contact with lower run-on tab 52, so, at moving contact 21 and quiet
When contact 22 separates, auxiliary run-on tab 54 can strengthen self-excitation magnetic field, improves the arc extinguishing ability of chopper.Lower run-on tab 52 upper
Holding the upper end with auxiliary run-on tab 54 to electrically connect, can be provided with a connecting hole 522 in the upper end of lower run-on tab 52, described auxiliary is drawn
The upper end of arc plate 54 is overlapped in connecting hole 522, and such connected mode is fairly simple, it is easy to assembling, cost-effective.In order to anti-
Only auxiliary run-on tab 54 and other location contacts of lower run-on tab 52, as shown in Figure 6, under can arranging on housing 1 medial wall
Run-on tab locating slot 14 and auxiliary run-on tab locating slot 15, the side of lower run-on tab 52 is inserted in lower run-on tab locating slot 14, auxiliary
The side helping run-on tab 54 is inserted in auxiliary run-on tab locating slot 15, and so the two relative position is fixed, will not relative movement and
Contact in other positions.The magnetic efficiency of ferrous material is relatively good, and low price, easily obtain, it is preferable that run-on tab,
Lower run-on tab 52 and auxiliary run-on tab 54 all use mild steel or ferrum to make.
Fig. 3 is shown as the structural relation schematic diagram of moving contact, static contact and arc initiation device, and Fig. 4 is shown as run-on tab
Structural representation；As shown in Figure 3 and Figure 4, upper run-on tab 51 includes connecting portion 511, pars intermedia 512 and the afterbody being sequentially connected with
513；Connecting portion 511 is connected with static contact 22, and afterbody 513 extends to arc-control device；Connecting portion 511, pars intermedia 512, afterbody 513
And it is respectively the entrance 531 of striking passage 53, changeover portion 532, outlet section 533 between lower run-on tab 52；According to manufacturing experience,
When the width of the changeover portion 532 of striking passage 53 is maintained at 8mm to 9.5mm, the magnetic blow-out effectiveness comparison of changeover portion 532 is good, electric arc
Velocity ratio very fast, be off during beneficially electric arc is rapidly introduced into arc-control device；And, the length of pars intermedia 512 is longer,
When changeover portion 532 corresponding to pars intermedia 512 is the most long, then during electric arc is in the preferable changeover portion of magnetic blow-out effect 532 time
Between the longest, changeover portion 532 is the best to the magnetic blow-out effect of electric arc, according to manufacturing experience, when the length of pars intermedia 512 is not less than
During 5mm, changeover portion 532 is preferable to the magnetic blow-out effect of electric arc.As it is shown on figure 3, entrance 531 width of striking passage 53 was more than
The section of crossing 532 width, and be gradually reduced to changeover portion 532 width from entrance 531；The width of entrance 531 is relatively big, and electric arc can
Relatively smoothly enter striking passage 53；Outlet section 533 width of striking passage 53 is more than changeover portion 532 width, and from transition
Section 532 is gradually increased to outlet section 533 width；The width of outlet section 533 is bigger, it is simple to by each to arc-control device of electric arc distribution
In individual grid.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from this utility model know-why, it is also possible to make some improvement and replacement, these change
Enter and replace and also should be regarded as protection domain of the present utility model.
Claims (11)
1. a miniature circuit breaker, including housing (1), moving contact (21), static contact (22), bimetal leaf (31), arc-control device
And arc initiation device (5) (4)；Described arc initiation device (5) includes upper run-on tab (51) and the lower run-on tab (52) being oppositely arranged, and above draws
Striking passage (53) is formed between arc plate (51) and lower run-on tab (52)；The upper end of described upper run-on tab (51) and static contact (22)
Electrical connection, the upper end of described lower run-on tab (52) electrically connects with moving contact (21)；It is characterized in that:
Lower run-on tab (52) upper end is turned under being converted into an elastic spring (521), and described elastic spring (521) upper end is fixed, elastic
The lower end of reed (521) is free end, and the lower end of described bimetal leaf (31) is connected with the lower end of elastic spring (521).
2. chopper as claimed in claim 1, is characterized in that: the lower end of described bimetal leaf (31) is welded on elastic spring
(521) lower end.
3. chopper as claimed in claim 1, is characterized in that: described housing (1) is provided with regulation screw (11), regulation
The lower end of bimetal leaf (31) and elastic spring (521) is tightly pressed together by screw (11).
4. chopper as claimed in claim 1, is characterized in that: described lower run-on tab (52) lower section is provided with one along lower run-on tab
(52) the auxiliary run-on tab (54) extended, auxiliary run-on tab (54) upper end electrically connects with lower run-on tab (52) upper end, and auxiliary is drawn
Other positions of arc plate (54) do not contact with lower run-on tab (52).
5. chopper as claimed in claim 4, is characterized in that: it is fixed that described housing (1) medial wall is provided with lower run-on tab (52)
Position groove (14) and auxiliary run-on tab (54) locating slot (15), the side of described lower run-on tab (52) is inserted in lower run-on tab (52) location
In groove (14), the side of described auxiliary run-on tab (54) is inserted in auxiliary run-on tab (54) locating slot (15).
6. chopper as claimed in claim 4, is characterized in that: the upper end of described lower run-on tab (52) is provided with a connecting hole
(522) in, the upper end of described auxiliary run-on tab (54) is overlapped on connecting hole (522).
7. chopper as claimed in claim 4, is characterized in that: described upper run-on tab (51), lower run-on tab (52) and auxiliary
Run-on tab (54) is mild steel or ferrum.
8. chopper as claimed in claim 1, is characterized in that: described upper run-on tab (51) includes the connecting portion being sequentially connected with
(511), pars intermedia (512) and afterbody (513)；Connecting portion (511) is connected with static contact (22), and afterbody (513) extends to arc extinguishing
Device (4)；Striking passage (53) it is respectively between connecting portion (511), pars intermedia (512), afterbody (513) and lower run-on tab (52)
Entrance (531), changeover portion (532), outlet section (533)；The width of the changeover portion (532) of described striking passage (53) keeps
At 8mm to 9.5mm.
9. chopper as claimed in claim 8, is characterized in that: the length of pars intermedia (512) is not less than 5mm.
10. chopper as claimed in claim 8, is characterized in that: entrance (531) width of described striking passage (53) is more than
Changeover portion (532) width, and be gradually reduced to changeover portion (532) width from entrance (531).
11. choppers as claimed in claim 8, is characterized in that: outlet section (533) width of described striking passage (53) is more than
Changeover portion (532) width, and be gradually increased to outlet section (533) width from changeover portion (532).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620179564.0U CN205582864U (en) | 2016-03-09 | 2016-03-09 | Miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620179564.0U CN205582864U (en) | 2016-03-09 | 2016-03-09 | Miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205582864U true CN205582864U (en) | 2016-09-14 |
Family
ID=56868050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620179564.0U Active CN205582864U (en) | 2016-03-09 | 2016-03-09 | Miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205582864U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112885671A (en) * | 2019-11-29 | 2021-06-01 | 上海良信电器股份有限公司 | Thermal trip system and circuit breaker |
| CN114050096A (en) * | 2021-11-11 | 2022-02-15 | 西安理工大学 | Miniature circuit breaker arc extinguishing system and have its miniature circuit breaker |
-
2016
- 2016-03-09 CN CN201620179564.0U patent/CN205582864U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112885671A (en) * | 2019-11-29 | 2021-06-01 | 上海良信电器股份有限公司 | Thermal trip system and circuit breaker |
| CN114050096A (en) * | 2021-11-11 | 2022-02-15 | 西安理工大学 | Miniature circuit breaker arc extinguishing system and have its miniature circuit breaker |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |