CN106898528A - The Pyromagnetic release of breaker - Google Patents
The Pyromagnetic release of breaker Download PDFInfo
- Publication number
- CN106898528A CN106898528A CN201510970144.4A CN201510970144A CN106898528A CN 106898528 A CN106898528 A CN 106898528A CN 201510970144 A CN201510970144 A CN 201510970144A CN 106898528 A CN106898528 A CN 106898528A
- Authority
- CN
- China
- Prior art keywords
- coil
- plate
- yoke
- bimetal leaf
- iron core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/40—Combined electrothermal and electromagnetic mechanisms
Abstract
The Pyromagnetic release of breaker includes contact plate, yoke and the bimetal leaf and coil that are connected with yoke, wherein described contact plate is electrically connected with bimetal leaf and coil respectively, the electric current part for passing through contact plate flows to bimetal leaf, and another part flows to coil；And the bimetal leaf is electrically connected indirectly by yoke with coil so that the electric current for flowing through bimetal leaf enters coil by yoke.The present invention provides a kind of Pyromagnetic release of breaker, is effectively shunted by the electric current for flowing through contact plate, so as to overload protection can be realized, product temperature rise can be reduced again, simple and reliable for structure, improves the reliability and stability of circuit breaker tripping action.
Description
Technical field
The present invention relates to Low Voltage Electrical Apparatus, and in particular to a kind of Pyromagnetic release of breaker.
Background technology
The major function of miniature circuit breaker is to realize that overload long delay protection and open circuit are instantaneous by Pyromagnetic release
Protection, the operation principle of hot tripping system is mainly what is realized by directly-heated type and heater-type two ways, directly
Hot type is to be bent come work by the direct current-carrying heating of double gold；Heater-type is by the current-carrying heating of thermal element
Being delivered to double gold causes heating bending to carry out work.The hot tripping system of existing miniature circuit breaker is mainly directly-heated
Formula structure, electric current directly by bimetal leaf, but the electric current that flows through it is larger when, easily there are time-delay characteristics not
Stabilization, it is temperature rise to cause such main cause, so as to influence the stability and reliability of overload protection；
Repeatedly debugging is needed and in existing miniature circuit breaker, Pyromagnetic release is difficult to Fast Installation in place, during installation,
Waste time and energy, there are problems that efficiency of assembling is low, mounting stability not.
The content of the invention
Defect it is an object of the invention to overcome prior art, there is provided a kind of temperature rise is low, simple and reliable to break
The Pyromagnetic release of road device.
To achieve the above object, present invention employs following technical scheme：
A kind of Pyromagnetic release of breaker, including contact plate 6, yoke 1 and connect with yoke 1
The bimetal leaf 5 and coil 4 for connecing, wherein the contact plate 6 is electrically connected with bimetal leaf 5 and coil 4 respectively,
The electric current part for passing through contact plate 6 flows to bimetal leaf 5, and another part flows to coil 4；And institute
State bimetal leaf 5 to be electrically connected indirectly with coil 4 by yoke 1 so that flow through the electricity of bimetal leaf 5
Stream enters coil 4 by yoke 1.
Preferably, the contact plate 6 is flexible coupling by first and 7 is electrically connected with coil 4, the contact plate 6
It is flexible coupling by second and 8 is electrically connected with bimetal leaf 5；First be flexible coupling 7 sectional area be more than the second soft company
8 sectional area is connect to realize that the electric current major part for flowing through contact plate 6 flows directly into coil 4, fraction is by double
Sheet metal 5 and yoke 1 enter coil 4.
Preferably, the bimetal leaf 5 includes first sheet metal 51 and the second sheet metal 52 of L-shaped connection,
First sheet metal 51 of bimetal leaf 5 is electrically connected with contact plate 6, the second sheet metal 52 of bimetal leaf 5
It is connected with the contact of yoke 1.
Preferably, also including the core assembly 2 and coil rack 3 on yoke 1, core assembly
2 are arranged in the barrel chamber 31 of coil rack 3, and coil 4 is sleeved on the outer wall of coil rack 3；The iron
Core assembly 2 includes connected dynamic iron core 21, push rod 22 and static iron core 23 and is arranged on push rod 22 and quiet iron
Iron core reaction spring 24 between core 23.
Preferably, the yoke 1 includes that bottom support plate 11 and perpendicular separation are arranged on bottom support plate
Left installing plate 12 and right installing plate 13 on 11, bimetal leaf 5 are welded on the bottom support plate of yoke 1
On 11, left installing plate 12 is provided with the left draw-in groove 121 of the static iron core 23 for clamp core assembly 2, right
Installing plate 13 is provided with the right draw-in groove 131 for clamp coil rack 3, and coil 4 is sleeved on left installing plate 12
And on the coil rack 3 between right installing plate 13, one end of coil 4 is welded on the bottom support of yoke 1
On plate 11, the other end of coil 4 is fixed on coil rack 3.
Preferably, the left end of the bottom support plate 11 stretches out to form one for welding bimetal leaf 5
Kink 111, one end of the kink 111 maintains an equal level with the end face of bottom support plate 11, kink 111
The other end is folded upward at；The bimetal leaf 5 includes first sheet metal 51 and the second metal of L-shaped connection
Piece 52, the first sheet metal 51 of bimetal leaf 5 is electrically connected with contact plate 6, the second metal of bimetal leaf 5
Piece 52 is fitted with the fair end welding of the kink 111 of yoke 1.
Preferably, the company for welding coil 4 is provided with the bottom support plate 11 with the adjacent of kink 111
Connect boss 112, coil 4 be welded on the connection boss 112 of bottom support plate 11 and not be welded on kink
The contact connection of bimetal leaf 5 on 111.
Preferably, the yoke 1 also includes and left installing plate 12 and the U-shaped connection of right installing plate 13
Rear connecting plate 14, the left installing plate 12 and right installing plate 13 be disposed on the top of bottom support plate 11,
And extended downward by rear connecting plate 14 and be connected on bottom support plate 11 to realize being fixed on bottom support plate 11
On.
Preferably, the right-hand member of the coil rack 3 is horizontally disposed with the lower has one for coil 4 described in clamp
The other end U-shaped plate 34, the A/F of U-shaped plate 34 is suitable with the thickness of coil 4, and coil 4 is lucky
The opening of U-shaped plate 34 can be passed through and be fixed in the opening of U-shaped plate 34；The right side of the coil rack 3
End is top to be vertically provided with the clamping plate 35 coordinated with the right installing plate 13 of yoke 1, clamping plate 35 with
The contact surface of right installing plate 13 is provided with the draw-in groove for being fixed on right installing plate 13.
Preferably, the axial direction of the static iron core 23 is coaxially provided with the spring for the action of iron core reaction spring 24
Pilot hole 232 and the push rod pilot hole 233 for the action of push rod 22；The aperture of spring pilot hole 232 is more than
The aperture of push rod pilot hole 233, forms for keeping out between spring pilot hole 232 and push rod pilot hole 233
Iron core reaction spring 24 keeps out boss 234；One end of push rod 22 and the end abutment of dynamic iron core 21, top
The other end of bar 22 passes sequentially through the spring pilot hole 232 and push rod pilot hole 233 of static iron core 23；The iron
Core reaction spring 24 is sleeved on push rod 22, and one end of iron core reaction spring 24 abuts with push rod 22, separately
One end is connected to the keeping out on boss 234 of static iron core 23 by the spring pilot hole 232 of static iron core 23.
The Pyromagnetic release of breaker of the invention, is effectively shunted by the electric current for flowing through contact plate,
So as to overload protection can be realized, product temperature rise can be reduced again, it is simple and reliable for structure, improve circuit breaker tripping
The reliability and stability of action.It is flexible coupling to realize unequal shunting by using sectional area is of different sizes,
The reliability of overload protection can be effectively improved, product temperature rise can be effectively reduced again；Avoid simultaneously thicker soft
Connection hinders the normal bending of interference bimetal leaf, improves the stability and reliability of product.It is rationally distributed,
It is mutually non-interference, ensure shunting effect；Connect the setting of boss, both weldering of the set winding on yoke
Position is connect, bimetal leaf can be kept out again to position welding position of the bimetal leaf on yoke, it is convenient fast
Fast positioning welding, ensures that coil is non-interference with the welding position of bimetal leaf.Additionally, coil, coil bone
Frame, core assembly, yoke assembling structure is simple, reliability and efficiency high.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the Pyromagnetic release of breaker of the invention；
Fig. 2 is the right axle mapping of the Pyromagnetic release of breaker of the invention；
Fig. 3 is the left axle mapping of the Pyromagnetic release of breaker of the invention；
Fig. 4 is the sectional view of coil rack of the invention and core assembly；
Fig. 5 is the sectional view of static iron core of the invention.
Specific embodiment
Below in conjunction with the embodiment that accompanying drawing 1 to 5 is given, the pyromagnetic de- of breaker of the invention is further illustrated
Detain the specific embodiment of device.The Pyromagnetic release of breaker of the invention is not limited to the following description.
As shown in figure 1, the Pyromagnetic release of breaker of the invention include contact plate 6, yoke 1 and
The bimetal leaf 5 and coil 4 being connected with yoke 1, wherein the contact plate 6 respectively with bimetal leaf 5
Electrically connected with coil 4 so that the electric current part for flowing through contact plate 6 flows to bimetal leaf 5, another part stream
To coil 4；And the bimetal leaf 5 is electrically connected indirectly by yoke 1 with coil 4 so that flow through
The electric current of bimetal leaf 5 enters coil 4 by yoke 1.Flow through an electric current part for contact plate 6 directly
Flowed out from coil 4, another part passes sequentially through bimetal leaf 5, yoke 1 and enters back into coil 4, convection current
Effectively shunted through the electric current of contact plate, so as to overload protection can be realized, product temperature rise can be reduced again,
It is simple and reliable for structure, improve the reliability and stability of circuit breaker tripping action.
Contact plate of the invention 6 and bimetal leaf 5, the connected mode of coil 4, the contact plate 6 lead to respectively
Cross first and be flexible coupling and 7 and second be flexible coupling and 8 electrically connected with coil 4 and bimetal leaf 5, first is flexible coupling 7
Be welded on together on contact plate 6 by spot welding with second be flexible coupling 8 one end, first be flexible coupling 7 it is another
End is welded on the end that coil 4 is connected with yoke 1, and second be flexible coupling 8 other end is welded on pair
Sheet metal 5 is not contacted on the end being connected with yoke 1；Wherein first be flexible coupling 7 sectional area is more than
Second be flexible coupling 8 sectional area flows directly into coil 4, small portion to realize the electric current major part for flowing through contact plate 6
Divide and coil 4 is entered by bimetal leaf 5 and yoke 1.It is flexible coupling by using sectional area is of different sizes
To realize unequal shunting, the reliability of overload protection can be effectively improved, product temperature rise can be effectively reduced again；
Avoid simultaneously it is thicker be flexible coupling hinder the normal bending of interference bimetal leaf, improve product stability and can
By property.
As shown in Figures 2 and 3, the Pyromagnetic release of breaker of the invention also includes being arranged on yoke 1
On core assembly 2 and coil rack 3, core assembly 2 be arranged on coil rack 3 barrel chamber 31 in, line
Circle 4 is sleeved on the outer wall of coil rack 3；The core assembly 2 includes connected dynamic iron core 21, push rod
22 and static iron core 23 and the iron core reaction spring 24 that is arranged between push rod 22 and static iron core 23.
Yoke of the invention 1 includes that bottom support plate 11 and perpendicular separation are arranged on bottom support plate 11
Left installing plate 12 and right installing plate 13, bimetal leaf 5 is welded on the bottom support plate 11 of yoke 1,
Left installing plate 12 is provided with the external part that is stretched out outside barrel chamber 31 for the static iron core 23 of clamp core assembly 2
Left draw-in groove 121, the external part of static iron core 23 is provided with the fixing groove 231 coordinated with left installing plate 12, fixed
The width of groove 231 is suitable with the thickness of left installing plate 12, and static iron core 23 just can be by fixation thereon
Groove 231 is fixedly mounted on the left installing plate 12 of yoke 1；Right installing plate 13 is provided with for clamp
The right draw-in groove 131 of coil rack 3, coil 4 is sleeved on the coil between left installing plate 12 and right installing plate 13
On skeleton 3, one end of coil 4 is welded on the bottom support plate 11 of yoke 1, the other end of coil 4
It is fixed on coil rack 3.
Bimetal leaf of the invention 5 includes first sheet metal 51 and the second sheet metal 52 of L-shaped connection, double
First sheet metal 51 of sheet metal 5 is flexible coupling by second and 8 is electrically connected with contact plate 6, bimetal leaf 5
Second sheet metal 52 is connected with the contact of yoke 1；Further, the left end of the bottom support plate 11 to
Outer extension forms a kink 111 for being used to weld bimetal leaf 5, one end and bottom of the kink 111
The end face of support plate 11 maintains an equal level, and the other end of kink 111 is folded upward at；First metal of bimetal leaf 5
Piece 51 is flexible coupling by second and 8 is electrically connected with contact plate 6, second sheet metal 52 and magnetic of bimetal leaf 5
The fair end welding laminating of the kink 111 of yoke support 1.It is adjacent with kink 111 on bottom support plate 11
Place is provided with the connection boss 112 for welding coil 4, and coil 4 is welded on the connection boss of bottom support plate 11
It is connected on 112 and not with the contact of bimetal leaf 5 being welded on kink 111.It is rationally distributed, do not do mutually
Relate to, ensure shunting effect；The setting of boss is connected, both welding position of the set winding on yoke,
Bimetal leaf can be kept out again to position welding position of the bimetal leaf on yoke, fast and easy tack welding
Connect, ensure that coil is non-interference with the welding position of bimetal leaf.
Yoke of the invention 1 also include with left installing plate 12 and the U-shaped connection of right installing plate 13 after
Connecting plate 14, the left installing plate 12 and right installing plate 13 are disposed on the top of bottom support plate 11, and
Extended downward by rear connecting plate 14 and be connected on bottom support plate 11 to realize being fixed on bottom support plate 11.
The setting of connecting plate afterwards, it is to avoid left installing plate and right installing plate interfere the installation of other parts, the left peace of simplification
The fit structure of dress plate and right installing plate and other parts, simple structure and solid and reliable is easy to processing,
And it is easy to overall assembling, improve efficiency of assembling and stability.
In order to improve the stability of overall assembling, as shown in Figures 2 and 3, coil rack of the invention 3
Right-hand member is horizontally disposed with the lower a U-shaped plate 34 for the other end of coil 4 described in clamp, U-shaped plate 34
A/F it is suitable with the thickness of coil 4, coil 4 just can pass through U-shaped plate 34 opening and fixation
In the opening of U-shaped plate 34；The right-hand member of the coil rack 3 is top to be vertically provided with and yoke 1
The clamping plate 35 that right installing plate 13 coordinates, clamping plate 35 is provided with for fixing with the contact surface of right installing plate 13
Draw-in groove on right installing plate 13.Simple structure and rationally distributed, is easy to assembling, improves efficiency of assembling and steady
It is qualitative.
As shown in Figure 4 and Figure 5, the axial direction of static iron core of the invention 23 is coaxially provided with connected anti-for iron core
The spring pilot hole 232 and the push rod pilot hole 233 for the action of push rod 22 of the action of power spring 24；Push rod is led
That one end being interlinked to the outside to hole 233 and barrel chamber 31 is provided with flare openings, it is easy to processes, is easy to push rod to act,
Ensure the stability of circuit breaker tripping；The aperture of spring pilot hole 232 is more than the aperture of push rod pilot hole 233,
Form convex for keeping out keeping out for iron core reaction spring 24 between spring pilot hole 232 and push rod pilot hole 233
Platform 234；One end of push rod 22 and the end abutment of dynamic iron core 21, the other end of push rod 22 pass sequentially through quiet
The spring pilot hole 232 and push rod pilot hole 233 of iron core 23；The iron core reaction spring 24 is sleeved on push rod
On 22, one end of iron core reaction spring 24 is abutted with push rod 22, and the other end is led by the spring of static iron core 23
The keeping out on boss 234 of static iron core 23 is connected to hole 232.
The mounting means of core assembly of the invention 2, dynamic iron core 21, is set with outward iron core reaction spring 24
Push rod 22 and static iron core 23 are sequentially arranged in the barrel chamber 31 of coil rack 3 from right to left；Positioned at barrel chamber 31
The left end of the dynamic iron core 21 of right-hand member is kept out in barrel chamber 31, and the right-hand member of dynamic iron core 21 is exposed at outside barrel chamber 31,
The external diameter size difference of the left and right end junction of dynamic iron core 21 forms the first spacing block set 211, correspondingly, line
The right-hand member exit of barrel chamber 31 of ring framework 3 is provided with the second spacing block set 36 of cooperation, the first spacing block set 211
With the second spacing block set 36 cooperatively form to the actuating length of dynamic iron core 21 it is spacing with keep out dynamic iron core 21 from
Abjection in the barrel chamber 31 of coil rack 3；Right-hand member positioned at the static iron core 23 of the left end of barrel chamber 31 snaps in coil bone
In the barrel chamber 31 of frame 3, the left end of static iron core 23 is stretched out outside barrel chamber 31 and is blocked by fixing groove 231 thereon
Connect on the left installing plate 12 for being fixed on yoke 1.
Above content is to combine specific preferred embodiment further description made for the present invention, no
Can assert that specific implementation of the invention is confined to these explanations.It is common for the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, some simple deductions can also be made or replaced
Change, should all be considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of Pyromagnetic release of breaker, it is characterised in that：Including contact plate (6), yoke (1)
And the bimetal leaf (5) and coil (4) being connected with yoke (1), wherein the contact plate (6)
Electrically connected with bimetal leaf (5) and coil (4) respectively so that flow through an electric current part for contact plate (6)
Bimetal leaf (5) is flowed to, another part flows to coil (4)；And the bimetal leaf (5) is by yoke
Support (1) is electrically connected indirectly with coil (4) so that flow through the electric current of bimetal leaf (5) by yoke branch
Frame (1) enters coil (4).
2. the Pyromagnetic release of breaker according to claim 1, it is characterised in that：The contact plate
(6) by first be flexible coupling (7) electrically connected with coil (4), the contact plate (6) is soft by second
Connection (8) is electrically connected with bimetal leaf (5)；First sectional area for being flexible coupling (7) is flexible coupling more than second
(8) sectional area flows directly into coil (4), small portion to realize the electric current major part for flowing through contact plate (6)
Divide and coil (4) is entered by bimetal leaf (5) and yoke (1).
3. the Pyromagnetic release of breaker according to claim 1, it is characterised in that：The bimetallic
First sheet metal (51) and second sheet metal (52) of the piece (5) including L-shaped connection, bimetal leaf (5)
The first sheet metal (51) electrically connected with contact plate (6), second sheet metal (52) of bimetal leaf (5)
It is connected with yoke (1) contact.
4. the Pyromagnetic release of breaker according to claim 1, it is characterised in that：Also include installing
Core assembly (2) and coil rack (3) on yoke (1), core assembly (2) are installed online
In the barrel chamber (31) of ring framework (3), coil (4) is sleeved on the outer wall of coil rack (3)；It is described
Core assembly (2) includes the dynamic iron core (21), push rod (22) and the static iron core (23) that are connected and setting
Iron core reaction spring (24) between push rod (22) and static iron core (23).
5. the Pyromagnetic release of breaker according to claim 4, it is characterised in that：The yoke branch
Frame (1) is arranged on the left installation on bottom support plate (11) including bottom support plate (11) and perpendicular separation
Plate (12) and right installing plate (13), bimetal leaf (5) are welded on the bottom support plate (11) of yoke (1)
On, left installing plate (12) is provided with the left draw-in groove (121) of the static iron core (23) for clamp core assembly (2),
Right installing plate (13) is provided with the right draw-in groove (131) for clamp coil rack (3), coil (4) set
On coil rack (3) between left installing plate (12) and right installing plate (13), coil (4)
One end is welded on the bottom support plate (11) of yoke (1), and the other end of coil (4) fixes online
On ring framework (3).
6. the Pyromagnetic release of breaker according to claim 5, it is characterised in that：The bottom support
The left end of plate (11) stretches out to form a kink (111) for welding bimetal leaf (5), institute
One end of kink (111) is stated to maintain an equal level with the end face of bottom support plate (11), kink (111) it is another
End is folded upward at；First sheet metal (51) and second gold medal of the bimetal leaf (5) including L-shaped connection
Category piece (52), first sheet metal (51) of bimetal leaf (5) is electrically connected with contact plate (6), bimetallic
Second sheet metal (52) of piece (5) is pasted with the fair end welding of the kink (111) of yoke (1)
Close.
7. the Pyromagnetic release of breaker according to claim 6, it is characterised in that：The bottom support
The connection boss (112) for welding coil (4) is provided with kink (111) adjacent on plate (11),
Coil (4) be welded on the connection boss (112) of bottom support plate (11) and not be welded on kink (111)
On bimetal leaf (5) contact connection.
8. the Pyromagnetic release of breaker according to claim 5, it is characterised in that：The yoke branch
Frame (1) also includes the rear connecting plate (14) with left installing plate (12) and right installing plate (13) U-shaped connection,
The left installing plate (12) and right installing plate (13) are disposed on the top of bottom support plate (11), and
Extended downward by rear connecting plate (14) and be connected on bottom support plate (11) to realize being fixed on bottom support
On plate (11).
9. the Pyromagnetic release of breaker according to claim 5, it is characterised in that：The coil bone
The right-hand member of frame (3) is horizontally disposed with the lower a U-shaped plate for the other end of coil (4) described in clamp
(34), the A/F of U-shaped plate (34) is suitable with the thickness of coil (4), and coil (4) just can
Through the opening of U-shaped plate (34) and it is fixed in the opening of U-shaped plate (34)；The coil rack (3)
Right-hand member it is top be vertically provided with the clamping plate (35) coordinated with the right installing plate (13) of yoke (1),
Clamping plate (35) is provided with for being fixed on right installing plate (13) with right installing plate (13) contact surface
Draw-in groove.
10. breaker according to claim 4 Pyromagnetic release it is characterized in that：The static iron core
(23) axial direction is coaxially provided with spring pilot hole (232) and use for iron core reaction spring (24) action
In the push rod pilot hole (233) of push rod (22) action；Led more than push rod in the aperture of spring pilot hole (232)
To the aperture of hole (233), formed for supporting between spring pilot hole (232) and push rod pilot hole (233)
Buting iron core reaction spring (24) keeps out boss (234)；One end of push rod (22) and dynamic iron core (21)
End abutment, the other end of push rod (22) passes sequentially through the spring pilot hole (232) of static iron core (23)
With push rod pilot hole (233)；The iron core reaction spring (24) is sleeved on push rod (22), and iron core is anti-
One end of power spring (24) is abutted with push rod (22), and the other end is oriented to by the spring of static iron core (23)
Hole (232) is connected to the keeping out on boss (234) of static iron core (23).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510970144.4A CN106898528B (en) | 2015-12-21 | 2015-12-21 | The Pyromagnetic release of breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510970144.4A CN106898528B (en) | 2015-12-21 | 2015-12-21 | The Pyromagnetic release of breaker |
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| CN106898528A true CN106898528A (en) | 2017-06-27 |
| CN106898528B CN106898528B (en) | 2019-09-06 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054066A (en) * | 2017-12-15 | 2018-05-18 | 浙江正泰电器股份有限公司 | The clod wash pivot structure of circuit breaker electric magnetic release |
| CN109390192A (en) * | 2017-08-11 | 2019-02-26 | 浙江正泰电器股份有限公司 | Thermo-magnetic system structure |
| CN109712850A (en) * | 2017-10-25 | 2019-05-03 | 浙江正泰电器股份有限公司 | Electromagnetic trip device assembly |
| CN109712850B (en) * | 2017-10-25 | 2024-05-14 | 浙江正泰电器股份有限公司 | Electromagnetic release assembly |
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| CN108054066B (en) * | 2017-12-15 | 2023-09-12 | 浙江正泰电器股份有限公司 | Cold bending rotating shaft structure of electromagnetic release of circuit breaker |
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| CN106898528B (en) | 2019-09-06 |
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