CN2561085Y

CN2561085Y - Foreward-reverse electromagnetic switch apparatus

Info

Publication number: CN2561085Y
Application number: CN 02243005
Authority: CN
Inventors: 庄鸿杰
Original assignee: TIANDE ELECTRIC MACHINE CO Ltd
Current assignee: TIANDE ELECTRIC MACHINE CO Ltd
Priority date: 2002-07-22
Filing date: 2002-07-22
Publication date: 2003-07-16
Anticipated expiration: 2012-07-22

Abstract

The utility model relates to a positive and reverse electromagnetic switch, which comprises a connection point unit and a magnetic drive unit. The connection point unit comprises a first casing body, a fixing connection point component and a moving connection point component, the connection point component is movably positioned in the first casing body and is electrically contacted with the fixing connection point component; the magnetic drive unit comprises a second casing body, a first drive group and a second drive group, the first drive group comprises a first fixing iron core, a first exciting coil, a first moving iron core, and a first propping piece connected with the first moving iron core and pushing and holding against the moving connection point component; the second drive group comprises a second fixing iron core, a second exciting coil, a second moving iron core, and a second propping piece connected with the second moving iron core and pushing and holding against the moving connection point component. The utility model can lead the connection point unit and the magnetic drive unit to be divided into two die set semi finished products which can be independently produced and detected, and has the efficacies that the production is fast and convenient, and the testing and the maintenance are convenient.

Description

Just contrary electromagentic switching apparatus

[technical field]

The utility model relates to a kind of just contrary electromagentic switching apparatus, particularly relates to a kind of junction unit and magnetic drive unit and can separately separate and combination, just contrary electromagentic switching apparatus conveniently to manufacture and to detect.

[background technology]

Fig. 1 and Fig. 2 illustrate a kind of traditional just contrary electromagentic switching apparatus.This just contrary electromagentic switching apparatus comprises a housing 3, one group of fixed iron core (including one first fixed iron core 41 and one second fixed iron core 42), one group of coil (including one first magnetizing coil 51 and one second magnetizing coil 52), one group of moving core (including one first moving core 61 and one second moving core 62), and a movable contact member 8.

Housing 3 has a body 31 and a sealed base 32 that is connected body 31 bottom positions, the position, both sides, upper end of body 31 is provided with plurality of fixed contact 311, can connect outside wiring (figure does not show) in order to correspondence, and be hollow form in the body 31, can define an accommodation space 30 that holds the following stated member with base 32.

First fixed iron core 41 is to be fixed on the base 32, make first magnetizing coil 51 be assembled in first fixed iron core, 41 tops, first magnetizing coil, 51 tops then again with the assembling of first moving core 61, and second fixed iron core 42, second magnetizing coil 52 and second moving core 62 also in the same manner assembling and position on base 32.And first moving core 61 and second moving core, 62 tops further are respectively equipped with a

support

71,72 that is the U font, and two opposite ends of each support respectively have an axis hole 711,721.

Movable contact member 8 has tabular pedestal 81 and most conducting strips 82 that are located on the pedestal 81 that a plastic cement is made, each outwards is extruded with two protruding axles 83 two opposition side limits of pedestal 81, in the axis hole 711,721 that is contained in

support

71,72 accordingly, make movable contact member 8 be hubbed on two supports, 71,72 tops, in addition, the spring 84 of pedestal 81 in two supports, 71,72 centre positions places more is provided with the body 31 that two two ends are connected to pedestal 81 and housing 3 respectively.

As Fig. 2, when making first fixed iron core 41 produce magnetic attraction when 51 energisings of first magnetizing coil, to attract first moving core 61 to move downward, frame 71 produces drawing under the side direction of the pedestal 81 of movable contact member 8 as scheming counterclockwise positive deflection so can ask for an advance on one's pay, with a side of the conducting strip 82 that causes movable contact member 8 and wherein the fixed contact 311 of a corresponding side form electrically contact, an other side of the conducting strip 82 of movable contact member 8 is then separated formation because of pedestal 81 perks with the fixed contact 311 of a corresponding side and is opened circuit, on the contrary, when the outage of first magnetizing coil 51 and during 52 energisings of second magnetizing coil, then can make the pedestal 81 reverse deflections of movable contact member 8, and make the conducting strip 82 of

movable contact member

8 and 311 of fixed contacts form another electrical engagement state.And detailed wiring mode and internal structure, the emphasis that will discuss because of non-the utility model, and it also is a kind of general technology, this promptly no longer explaining more.

And after any one just contrary electromagentic switching apparatus assembling is finished, final work must be carried out functional test to guarantee the correct of its action, and its main project has two, one for testing the action after first magnetizing

coil

51 and 52 energisings of second magnetizing coil, and whether another then is correct with the electrical engagement state of fixed contact 311 after positive deflection and reverse deflection to movable contact member 8.Yet, with regard to aforesaid just contrary electromagentic switching apparatus or in addition with regard to other similarly just contrary structures of electromagentic switching apparatus, because all members all install in housing 3 and have continuous action relation mutually, when therefore desiring to carry out the operation of above-mentioned test, must assemble one by one at all members and just can carry out after finishing, and when desiring to change in case find in the finished product certain member partly not meet standard, after being taken apart again, all members just can change, hence one can see that, not only manufacturing process is comparatively loaded down with trivial details is difficult for, and also quite lacks efficient in the test of product and maintenance.

[utility model content]

The purpose of this utility model is to provide a kind of just contrary electromagentic switching apparatus, contact part and Electromagnetic Drive partly can be divided into two the module semi-finished product that can independently produce and test, has the feasible effect of producing fast and making things convenient for test and maintenance.

Just contrary electromagentic switching apparatus of the present utility model is to connect most bar outside wirings, and this electromagentic switching apparatus comprises a junction unit and a magnetic drive unit, it is characterized in that:

This junction unit includes one first housing, a fixed contact member and a movable contact member, this first enclosure interior forms one first accommodation space, this fixed contact member position is in this first accommodation space and connect this outside wiring, and this movable contact member is to be positioned in this first accommodation space pivotly and to produce with this fixed contact member electrically to contact;

This magnetic drive unit includes one second housing, one first driving group and one second driving group, this second enclosure interior is formed with second accommodation space that is connected with this first accommodation space, and this second housing combines with this first housing, this first driving group comprise one be positioned at first magnetizing coil, that first fixed iron core in this second accommodation space, matches with this first fixed iron core with corresponding first moving core of this first fixed iron core, reach first supporting member that is connected and pushes against this movable contact member with this first moving core; After the energising of first magnetizing coil produced magnetic field, first supporting member can promote the movable contact member and produce positive deflection, makes movable contact member and fixed contact member form one first electrical engagement state; And this second driving group comprise one be positioned at second magnetizing coil that second fixed iron core in this second accommodation space, matches with this second fixed iron core, with corresponding second moving core of this second fixed iron core, reach one and be connected and push against second supporting member of this movable contact member with this second moving core.When the first magnetizing coil no power, and behind second magnetizing coil energising generation magnetic field, second supporting member can promote the movable contact member and produce reverse deflection, makes movable contact member and fixed contact member form one second electrical engagement state.

Described just contrary electromagentic switching apparatus is characterized in that:

The fixed contact member of this junction unit can comprise a pedestal and be fixed on most fixed-conductive films on this pedestal that this each fixed-conductive film passes this first housing and electrically connects this corresponding outside wiring.

This pedestal respectively is provided with a protruding pinna at its place, two opposite sides limit, respectively more is provided with a corresponding pivot hole on this protruding pinna.

This movable contact member can comprise a plate body and most the movable conducting strips that are fixed on this plate body, and the place, two opposition side limits of this plate body then respectively is provided with an outwards outstanding protruding axle, and this protruding axle is fastened in the pivot hole of this pedestal correspondence.

This pivot hole can be an elongated hole that holds the protruding axle of this correspondence, and the length of this elongated hole just make this plate body during simultaneously by this first supporting member and this second supporting member ejection this movable contact member do not produce any electrical joint with this fixed contact member.

Second housing of this magnetic drive unit has more a diapire and most all sidewalls that are centered around this bottom wall edge, this diapire and this isoperimetric sidewall define this second accommodation space, and more be provided with two support portions of supporting this first magnetizing coil and this second magnetizing coil respectively on this diapire, make this first magnetizing coil and this second magnetizing coil respectively and have a space of moving for this first moving core and this second moving core between this diapire, this first fixed iron core and this second fixed iron core are then making up with this first magnetizing coil and this second magnetizing coil near the position of this junction unit is corresponding respectively, and are locked together in stator on this second housing by one and engage this first fixed iron core and this second fixed iron core simultaneously to fix it relatively in the position of this second housing.

This first supporting member has a body that combines with this first moving core and two at this body two opposite sides and the top board that extends to this junction unit, makes this top board contact this movable contact member place and forms this top.

This second supporting member has a body that combines with this second moving core and two at this body two opposite sides and the top board that extends to this junction unit, makes this top board contact this movable contact member place and forms this top.

First housing of this junction unit more is provided with an Access Division, and second housing of this magnetic drive unit is then fastening the buckling parts of location to should wedging position installing one with this buckling parts mutually.

This Access Division is respectively to be formed with one at this first housing two opposite sides place to this second housing direction extension and outstanding hook plate outwardly, this buckling parts then is to form a breach and a horizontal block wall in this breach in this second housing corresponding position, this block wall more is formed with one near first of this first housing and one opposite with first second, this hook plate correspondence is entered in this breach and by this block wall first, and flexibly be fastened on second of this block wall.

This hook plate more is provided with a perforation and an elastic component of putting in this perforation, and this elastic component plugs between this hook plate and this block wall second.

This junction unit is provided with most the inserted terminals that electrically connect with this outside wiring, and this magnetic drive unit is then corresponding to be provided with most and to plant for this inserted terminal and produce the electrically sockets of joint.

Just contrary electromagentic switching apparatus of the present utility model by junction unit and the structure that the magnetic drive unit can separately separate, makes junction unit and magnetic drive unit independently to assemble apace after making and the test respectively again.

[description of drawings]

Below by most preferred embodiment and accompanying drawing just contrary electromagentic switching apparatus of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is a kind of traditional just contrary electromagentic switching apparatus three-dimensional exploded view;

Fig. 2 is the part component composition trailing flank schematic diagram of the just contrary electromagentic switching apparatus of Fig. 1, in order to its start principle to be described;

Fig. 3 is the of the present utility model one big cage structure exploded view than Cui embodiment, illustrates that the utility model divides into a junction unit and a magnetic drive unit;

Fig. 4 is the junction unit detail structure exploded view of Fig. 3;

Fig. 5 is the magnetic drive unit detail structure exploded view of Fig. 3;

Fig. 6 is the side schematic view after this makes up than Cui embodiment, and the partly relative position relation of member is described;

Fig. 7 is the action schematic diagram of Fig. 6, the position of associated components relation when one first driving group start is described;

Fig. 8 is the action schematic diagram of Fig. 6, the position of associated components relation when one second driving group start is described;

Fig. 9 is the action schematic diagram of Fig. 6, the position relation of associated components when the start simultaneously of this first driving group and this second driving group is described; And

Figure 10 is the part member side cross-sectional schematic after this makes up than Cui embodiment, and the wedged connecting structure of one first housing and one second housing is described.

[embodiment]

Consult Fig. 3, Fig. 4 and Fig. 5, one of just contrary electromagentic switching apparatus of the present utility model mainly comprises a junction unit 1 and a magnetic drive unit 2 than Cui embodiment.Make just contrary electromagentic switching apparatus in order to connect most bar outside wirings (figure does not show), to carry out the control of galvanic circle conversion.Wherein, junction unit 1 includes one first housing 11, a fixed contact member 12 and a movable contact member 13 again, and magnetic drive unit 2 then comprises one second housing 21, one first driving group 22 and one second driving group 23.

First housing 11 is made for insulating material, and its inside is formed with one first accommodation space 110, and first housing 11 has a roof 111 up, and roof 111 is provided with most and runs through the through hole 112 that is communicated with first accommodation space 110.

Fixed contact member 12 has most fixed-conductive films 121 and a pedestal 122, pedestal 122 is made for fixed-conductive film 121 sealed location for insulating material, make pedestal 122 and fixed-conductive film 121 be positioned in first accommodation space 110, and the part of each fixed-conductive film 121 can be passed the through hole 112 on the roof 111 that is located at first housing 11 accordingly and be exposed outside, and makes that each fixed-conductive film 121 can be in order to electrically connect corresponding outside wiring.Again, pedestal 1 22 respectively is provided with a protruding pinna 123 that extends downwards at its place, two opposite sides limit, and the corresponding position of each protruding pinna 123 more is provided with a pivot hole 124, and in this example, pivot hole 124 generally is the elongated hole that an above-below direction has extended distance.

Movable contact member 13 has plate body 132 and most sealed movable conducting strips 131 that are fixed on the plate body 132 that an insulating material is made, and plate body 132 respectively is provided with an outwards outstanding protruding axle 133 at the place, two opposition side limits of protruding pinna 123 positions of corresponding pedestal 122, borrow protruding axle 133 to be fastened in the pivot hole 124 of pedestal 122 correspondences, make plate body 132 form pivotable state with the imaginary axial line 130 relative pedestals 122 by two protruding axles 133, and plate body 132 is also divided into one the first half one 1321 and one the second half one 1322 with imaginary axial line 130,131 of each movable conducting strips extend with the directions of near vertical imagination axial line 130, make each movable conducting strip 131 opposite end respectively the position in position near the first half ones 1321 of plate body 132 and the second half ones 1322.

Second housing 21 is also made for insulating material, its have one below diapire 211, diapire 211 edges are around being provided with four all sidewalls 212 that extend upward, make diapire 211 and each 212 of all sidewall define one second accommodation space 210 jointly, and second housing 21 is removably to make up mutually with first housing 11, after the combination, second accommodation space 210 can be connected with first accommodation space 110 of first housing 11.In addition, more be provided with two groups of support portions 213 that upwards are the projection shape on the inner surface of diapire 211, wherein then be provided with corresponding the protuberance on two in opposite directions all sidewalls 212 in the locking part 214 on surface, locking part 214 then is provided with a screw 2141 on the face of top, in addition, second housing 21 more is provided with a stator 215, the two opposite sides correspondence of stator 215 in screw 2141 positions and be provided with one the perforation 2151, can utilize screw to pass perforation 2151 and stator 215 is locked together on the locking part 214 accordingly, make stator 215 second accommodation space 210 can be covered, in addition, stator 215 more is provided with two breach 2152 at opposite place, both sides, and breach 2152 also is communicated with second accommodation space 210.

The first driving group 22 has one first fixed iron core 221, one first magnetizing coil 222, one first moving core 223, its built-up sequence from top to bottom is first fixed iron core 221 in regular turn, first magnetizing coil 222 and first moving core 223, and first moving core 223 and further one first supporting member 224 that connects, first supporting member 224 has one and is microscler box-like body 2241 and two and is connected with at body 2241 two opposite sides and upwardly extending top board 2242, the place, the top of top board 2242 forms a top 2243, and body 2241 is in order to hold first moving core 223, be respectively equipped with the location hole 2244 that can be interconnected on first moving core 223 and the

body

2241,2231, borrow a bolt sheet 2245 to insert location hole 2244 simultaneously, in 2231, first supporting member 224 is combined with first moving core 223 form one.

22 structural similarities are organized in the second driving group 23 and first driving, also have one second fixed iron core 231, one second magnetizing coil 232, one second moving core 233 and one second supporting member 234, the all corresponding first driving group 22 of its structure and assembling mode is in this i.e. not repeat specification.

As Fig. 3 and Fig. 4, during combination, first housing 11, fixed contact member 12 and movable contact member 13 are to form junction unit 1 mutually and form module semi-finished product independently, make fixed contact member 12 be positioned in first accommodation space 110, movable contact member 13 then with imaginary axial line 130 be center of rotation pivotly the position in first accommodation space 110.

Second housing 21, the first driving group 22 and the second driving group 23 are then mutually formed magnetic drive unit 2, and it also forms module semi-finished product independently.Wherein, the first driving group 22 is to be seated in second accommodation space 210, make the support portion 213 of second housing 21 just can support first magnetizing coil 222, and make first

magnetizing coil

222 and 211 of diapires have one for the body 2241 of first moving core 223 and first supporting member 224 in space that above-below direction moves.In the same manner, the second driving group 23 also with the same manner be subjected to support portion 213 support and the position in second accommodation space 210, treat stator 215 be locked together in locking part 214 after, stator 215 can make first moving core 223 and second moving core, 233 location, and then the first driving group 22 and the second driving group 23 be limited in second accommodation space 210, and the top 2243 of top board 2242 ends of first supporting member, 224 both sides, and the top 2343 of both sides top board 2342 ends of second supporting member 234 all can be passed the breach 2152 on the stator 215 accordingly and is exposed outside.

As Fig. 6, when

junction unit

1 and 2 assemblings of magnetic drive unit when constituting complete just contrary electromagentic switching apparatus, first housing 11 and second housing 21 are involutory mutually fixing, and the top 2343 of the top 2243 of first supporting member 224 and second supporting member 234 will be stretched in first accommodation space 110 of first housing 11, and the corresponding respectively status, top 2343 that makes the top 2243 of first supporting member 224 and second supporting member 234 is located below the first half ones 1321 of plate body 132 and the second half ones 1322.

Again with reference to figure 7, when actual act, when second magnetizing coil, 232 no powers, and 222 energisings of first magnetizing coil produce magnetic field and make first fixed iron core 221 produce magnetic attraction, then will make first moving core 223 be subjected to the attraction of first fixed iron core 221 and move up, and then be adsorbed on first fixed iron core 221, the first half ones 1321 that first supporting member 224 then is subjected to the interlock of first moving core 223 that its top 2243 is further moved up with the plate body 132 that promotes movable contact member 13 upwards promote, at this moment, plate body 132 is that the center produces positive deflection with protruding axle 133 earlier, the second half ones 1322 of plate body 132 then move towards the below on the contrary, the second half, 1322 contacts of plate body 132 put in place below the top 2343 of second supporting member 234 time, top 2343 contact points that plate body 132 will be transferred with the second half ones 1322 and second supporting member 234 are that fulcrum is rotated further, at this moment, the elongated hole design in pivot hole 124 will allow that protruding axle 133 up moves in pivot hole 124, then will make movable contact member 13 and fixed contact member 12 form one first electrical engagement state.

In like manner as Fig. 8, when first magnetizing coil, 222 no powers, and when changing by 232 energisings of second magnetizing coil, the effect of its generation just makes the 13 reverse deflections of movable contact member, makes movable contact member 13 and fixed contact member 12 form one second electrical engagement state.

As shown in Figure 9; in addition; when moving if having first magnetizing coil 222 and second magnetizing coil 223 to switch on simultaneously; because of the top 2343 of the top 2243 of first supporting member 224 and second supporting member 234 the first half ones 1321 and the second half ones 1322 of contact plate body 132 simultaneously; make plate body 132 to rotate and directly upwards translation near pedestal 122; for fear of the first electrical engagement state and the second electrical engagement state generation is simultaneously arranged; the elongated hole in pivot hole 124 extended distance up and down is the design with certain-length; make the first half ones 1321 of plate body 132 and the second half ones 1322 be pushed against simultaneously and when moving up; borrow the restriction of 124 pairs of protruding axle 133 displacements in pivot hole; plate body 132 will stop at the place, fixed position; and because of the first half ones 1321 of plate body 132 and the second half ones 1322 pin down down mutually; its movable conducting strip 131 will can't electrically contact with any fixed-conductive film 121 fully, and so can switch on simultaneously at first magnetizing coil 222 and second magnetizing coil 232 provides a protective effect when producing misoperation.

Multiple with reference to figure 3, and simultaneously with reference to Figure 10, in order to strengthen the steadiness of

junction unit

1 and 2 combinations of magnetic drive unit, first housing 11 and second housing 21 are provided with the clamping apparatus that can fix mutually, can have multiple aspect during this clamping apparatus practical application, have the knack of this technology and can optionally be changed design, for just in explanation, below promptly enumerate an example, but do not exceed with this example.Wherein, clamping apparatus is to be respectively equipped with an Access Division and the buckling parts that can organize button mutually on first housing 11 and second housing 12, and in this example, the Access Division is respectively to be formed with one at first housing, 11 two opposite sides places to extension of second housing, 21 directions and outstanding hook plate 113 outwardly, buckling parts then is to form a breach 216 and a horizontal block wall 217 in breach 216 in second housing, 21 corresponding positions, block wall 217 more be formed with one up near first 2171 of first housing 11 and one with first 2171 mutually on the contrary the position below second 2172, make hook plate 113 be able to that correspondence enters in the breach 216 and by block wall 217 first 2171, and then elastic reset ground is fastened on second 2172 of block wall 217 with the formation positioning action.

In addition, because the part of ejection formation is in air humidity, conditions such as temperature change the cause that is difficult to accurate control, make the part of general ejection formation have the error existence of about 0.2mm dimensionally, so that be difficult to keep engaging closely in the position of clamping apparatus, in order to improve this shortcoming, hook plate 113 more is provided with 1131 and elastic components 1132 in perforation 1131 of a perforation, hook plate 113 be fastened on second of block wall 217 2172 o'clock, elastic component 1132 can suffer oppression and plug at hook plate 113 and block wall 217 second 2172 so that a project power to be provided, in order to fill up hook plate 113 and second 2172 of block wall 217 middle clearance, make 217 on hook plate 113 and block wall can not produce relative motion, increasing the linking steady character of first housing 11 and second housing 22, and guarantee under certain external force effect, to keep the state that do not break away from mutually.

Again simultaneously with reference to Fig. 3, Fig. 4 and shown in Figure 5, wherein four fixed-conductive films 121 of the fixed contact member 12 of junction unit 1 can further extend downwards and are provided with an outstanding inserted terminal 1211, magnetic drive unit 2 then correspondence is provided with most for the socket 2221 of inserted terminal 1211 plants to produce electrical joint, 2321, these

sockets

2221,2321 also form electrical loop with first magnetizing coil 222 and second magnetizing coil 232 accordingly, make when junction unit 1 and magnetic drive unit 2 after combination, first magnetizing coil 222 and second magnetizing coil 232 can be finished electric connection with the wherein specific fixed-conductive film 121 of fixed contact member 12, connect behind the outside wirings so that first magnetizing coil 222 and the required electrical loop of second magnetizing coil 232 to be provided via fixed-conductive film 121 again.So, magnetic drive unit 2 can provide the distribution of first magnetizing coil 222 and second magnetizing coil 232 in addition.

By independently module semi-finished product and the design that can make up mutually of above-mentioned junction unit 1 and magnetic drive unit 2 each self-forming, make on processing procedure, making separately all can be distinguished in junction unit 1 and magnetic drive unit 2, and when junction unit 1 is tested, only need make 13 deflections of movable contact member can learn whether electrical property state is normal, again, when testing, magnetic drive unit 2 also only needs first magnetizing

coil

222 or 232 energisings of second magnetizing coil, and then the corresponding top 2243 of observation, 2343 action is whether distinguishable its function is normal, and conventional construction just can be tested the inconvenience that is caused after generally all member assemblings must being finished for another example, can therefore significantly improve the efficient in assembling and the test.Again,, first magnetizing coil 222 or second magnetizing coil 232 change when having fault and need, or when revising movable contact member 13, only needing to change separately magnetic drive unit 2 or junction unit 1 gets final product, and because be the design of adopting engaging, do not need instrument promptly replaceable, also quite convenient in the maintenance.

Claims

1, a kind of just contrary electromagentic switching apparatus is to connect most bar outside wirings, and this electromagentic switching apparatus comprises a junction unit and a magnetic drive unit, it is characterized in that:

This magnetic drive unit includes one second housing, one first driving group and one second driving group, this second enclosure interior is formed with second accommodation space that is connected with this first accommodation space, and this second housing combines with this first housing, this first driving group comprises that one is positioned at first fixed iron core in this second accommodation space, one first magnetizing coil that matches with this first fixed iron core, one with corresponding first moving core of this first fixed iron core, and one be connected and push against first supporting member of this movable contact member with this first moving core, and this second driving group comprises that one is positioned at the second interior fixed iron core of this second accommodation space, one second magnetizing coil that matches with this second fixed iron core, one with corresponding second moving core of this second fixed iron core, and one be connected and push against second supporting member of this movable contact member with this second moving core.

2, just contrary electromagentic switching apparatus as claimed in claim 1 is characterized in that:

The fixed contact member of this junction unit comprises a pedestal and is fixed on most fixed-conductive films on this pedestal that this each fixed-conductive film passes this first housing and electrically connects this corresponding outside wiring.

3, just contrary electromagentic switching apparatus as claimed in claim 2 is characterized in that:

4, just contrary electromagentic switching apparatus as claimed in claim 3 is characterized in that:

This movable contact member comprises a plate body and most the movable conducting strips that are fixed on this plate body, and the place, two opposition side limits of this plate body then respectively is provided with an outwards outstanding protruding axle, and this protruding axle is fastened in the pivot hole of this pedestal correspondence.

5, just contrary electromagentic switching apparatus as claimed in claim 4 is characterized in that:

This pivot hole is the elongated hole that holds the protruding axle of this correspondence, and the length of this elongated hole just make this plate body during simultaneously by this first supporting member and this second supporting member ejection this movable contact member do not produce any electrical joint with this fixed contact member.

6, just contrary electromagentic switching apparatus as claimed in claim 1 is characterized in that:

7, just contrary electromagentic switching apparatus as claimed in claim 6 is characterized in that:

8, just contrary electromagentic switching apparatus as claimed in claim 6 is characterized in that:

9, just contrary electromagentic switching apparatus as claimed in claim 1 is characterized in that:

10, just contrary electromagentic switching apparatus as claimed in claim 9 is characterized in that:

11, just contrary electromagentic switching apparatus as claimed in claim 10 is characterized in that:

12, just contrary electromagentic switching apparatus as claimed in claim 1 is characterized in that: