CN208655460U - A kind of contact plate disjunction structure of microswitch - Google Patents

Abstract

The utility model discloses a kind of contact plate disjunction structure of microswitch, including base, contact long slab, contact short slab, contact axle assemble, driving arms, permanent magnet；The both sides of the edge of base are with one contact long slab of over-surplus fit structure setting；In the inside of contact long slab, with one contact short slab of over-surplus fit structure setting on base；It contacts short slab and contacts the movable contact of the intermediate setting contact axle assemble of long slab；In the rear side of contact long slab, one permanent magnet is set；In the opening of the other end insertion spring of contact axle assemble；The other end of spring is inserted into driving arm, and fixes in driving arm；It has technical effect that, so that the electric power of electric arc is amplified in one direction, switch is allowed to have better breaking arc ability in normal on-off, by the way that permanent magnet is arranged on switch base to reach the ability of its disjunction high current；With the advantages that high reliablity, driving is reliable, and protecting against shock ability is strong.

Description

A kind of contact plate disjunction structure of microswitch

Technical field

The utility model relates to the contact plate disjunction knots of microswitch more particularly to a kind of microswitch in low-voltage electrical apparatus Structure.

Background technique

Industrial control field is related to many different applying working conditions, meeting on electric parameter when each client uses Switch product It is different.In some special cases, there can be microswitch since arcing is excessive, industry is made so as to cause switch failure Control system brings hidden danger, damages sexual behavior event.

The usual contact element of ordinary tap is made of movable contact spring and static contact, and in driving, dynamic/static contact passes through driving Component completes wink dynamic switching, when more than striking current, can generate electric arc, and arc energy is directly proportional with voltage swing approximation, electricity Arc heat is directly proportional with size of current approximation, therefore under larger current and voltage, switch carry out disjunction when, can generate energy compared with The big and biggish electric arc of heat will lead to switch failure if being not provided with corresponding arc extinguishing measure, so that it is hidden to generate safety Suffer from.In existing technology, as shown in Fig. 1, it is not usually cut off since electric arc is not elongated；Result in microswitch Service life sharply shorten, meanwhile, also or electrically formed short circuit, cause electrical failure.

Utility model content

The purpose of this utility model is according in place of above-mentioned the deficiencies in the prior art, and the utility model aim is realized a kind of micro- The contact plate disjunction structure of dynamic switch, which is characterized in that including base, contact long slab, contact short slab, contact axle assemble, driving Bracket, permanent magnet；The both sides of the edge of the base are with one contact long slab of over-surplus fit structure setting；It is long in the contact The inside of plate, with one contact short slab of over-surplus fit structure setting on base；The contact short slab and the contact long slab Intermediate setting contact axle assemble movable contact；In the rear side of the contact long slab, one permanent magnet is set；In contact bridge group In the opening of the other end insertion spring of part；The other end of spring is inserted into driving arm, and fixes in driving arm.

Further, the contact long slab is in 7 fonts；The angle for contacting the short side bending part of long slab is set as obtuse angle, First Transition circular arc is set between the short side and the long side of the contact long slab of the contact long slab；The contact is long The first stationary contact is arranged in the lower section of the short side bending of plate.

Further, the contact short slab is in 7 fonts；The angle for contacting the short side bending part of short slab is set as acute angle, The second transition arc is set between the short side and the long side of the contact short slab of the contact short slab；The contact short slab Short side bending top be arranged the second stationary contact.

Further, which is characterized in that the contact axle assemble further includes button, bottom spring；In the upper of driving arm Side's setting button, button are arranged in the semicircle orifice opened up above base；In the lower section of driving arm, bottom spring, bottom are set Spring one end withstands driving arm, and the bottom spring other end withstands the bottom of base.

Further, which is characterized in that be non-parallel configuration between first stationary contact and the second stationary contact, and described The first stationary contact and the second stationary contact between movable contact is set.

The utility model has technical effect that, from contact element structure design, increases by one in contact Board position The bending of striking angle, so that the electric power of electric arc is amplified in one direction, to allow switch can in normal on-off There is better breaking arc ability.Meanwhile in the utility model patent, it is contemplated that the use of DC parameter, by switching Permanent magnet is set on base to reach the ability of its disjunction high current；Enable microswitch in a limited space in disjunction it is bigger DC parameter.The utility model is simplified the structure with minimizing, and the main optimization by design, having switch can By property height, the advantages that driving is reliable, and protecting against shock ability is strong, can be applied to be in the harsh industrial control condition of applying working condition Safety, reliability provide safeguard.

Detailed description of the invention

Fig. 1 is the arcing status diagram without striking angle contact plate of the utility model；

Fig. 2 is the switch internal structural schematic diagram of the utility model；

Fig. 3 is the arrangement schematic diagram of the permanent magnet of the utility model；

Fig. 4 is the arrangement schematic diagram of the overlook direction of the permanent magnet of the utility model；

Fig. 5 is the striking schematic diagram of the contact plate with striking angle of the utility model.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work The every other embodiment obtained, fall within the protection scope of the utility model.

In conjunction with shown in attached drawing 2, attached drawing 3, attached drawing 4, in the present invention, a kind of contact plate point of microswitch is provided Disconnected structure, including base 7, contact long slab 1, contact short slab 2, contact axle assemble 4, driving arm 8, permanent magnet 5；Base 7 Both sides of the edge are with one contact long slab 1 of over-surplus fit structure setting；In the inside of contact long slab 1, to be interference fitted knot on base 7 One contact short slab 2 of structure setting；It contacts short slab 2 and contacts the movable contact 41 of the intermediate setting contact axle assemble 4 of long slab 1；It is contacting A permanent magnet 5 is arranged in the rear side of long slab 1；In the opening of the other end insertion spring 3 of contact axle assemble 4；Spring 3 it is another End insertion driving arm 8, and it is fixed in driving arm 8；The contact plate disjunction structure of such microswitch, which can be realized, gets out of the way Pass can have better breaking arc ability in normal on-off.Meanwhile in the utility model patent, it is contemplated that DC parameter Use, by switch base setting permanent magnet to reach the ability of its disjunction high current；Microswitch is being had The bigger DC parameter of disjunction in the space of limit.

In conjunction with shown in attached drawing 5, contact long slab 1 is in 7 fonts；The angle for contacting 11 bending part of short side of long slab is set as blunt First Transition circular arc 13 is arranged between the short side 11 of contact long slab and the long side 12 of contact long slab in angle；Contact the short side of long slab The first stationary contact 14 is arranged in the lower section of 11 bendings.Equally, contact short slab 2 is in 7 fonts；Contact the angle of 21 bending part of short side of short slab Degree is set as acute angle, and the second transition arc 23 is arranged between the short side 21 of contact short slab and the long side 22 of contact short slab；Contact The second stationary contact 24 is arranged in the top of 21 bending of short side of short slab.It is non-parallel between first stationary contact 14 and the second stationary contact 24 Structure, and movable contact 41 is set between first stationary contact 14 and the second stationary contact 24.Contact 11 bending part of the short side setting of long slab For obtuse angle, 21 bending part of short side for contacting short slab is set as acute angle.Axle assemble 4 is contacted when carrying out disjunction, electric arc 6 can be generated. As shown in Fig. 5, due to the effect of permanent magnet 5, according to magnetic direction and current direction, (contact long slab 1 connects just electric arc 6 Pole, contact short slab 2 connect cathode, and magnetic field is inboard towards drawing direction), therefore meeting court such as figure direction arcing when arcing, and due to Arc leading angle increases normal direction length at disjunction, and electric arc 6 is caused to be easier to elongate in tangential direction, therefore electric arc 6 can be because draw It grows and faster extinguishes, the arc time is short, extends the service life of switch.From contact element structure design, in contact plate Position increases the bending of a striking angle, so that the electric power of electric arc is amplified in one direction, to allow switch just Normal open can have better breaking arc ability when disconnected.

In conjunction with shown in attached drawing 2, contact axle assemble 4 further includes button 44, bottom spring 42；It is set in the top of driving arm 8 Button 44 is set, button 44 is arranged in the semicircle orifice 43 opened up above base 7；In the lower section of driving arm 8, bottom spring is set 42, driving arm 8 is withstood in spring 42 one end in bottom, and spring 42 other end in bottom withstands the bottom of base 7.

Above-mentioned structure ensure that contact axle assemble 4 during movement, can rapidly carry out disjunction, so that producing The length of raw electric arc 6 is shorter；In this way, the extinguishing being more easier, can play the purpose of protective switch.

As the utility model preferred embodiment, it is obvious to a person skilled in the art that the utility model is unlimited It, can in the details of above-mentioned exemplary embodiment, and without departing substantially from the spirit or essential attributes of the utility model The utility model and the protection scope of the utility model are realized in other specific forms.Which point therefore, no matter come from It sees, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by appended claims Rather than above description limits, it is intended that by all changes that come within the meaning and range of equivalency of the claims capsule It includes in the utility model.Any reference signs in the claims should not be construed as limiting the involved claims.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

Claims (5)

1. a kind of contact plate disjunction structure of microswitch, which is characterized in that including base, contact long slab, contact short slab, contact Axle assemble, driving arm, permanent magnet；The both sides of the edge of the base are with one contact long slab of over-surplus fit structure setting；? The inside of the contact long slab, with one contact short slab of over-surplus fit structure setting on base；The contact short slab and institute The movable contact of the intermediate setting contact axle assemble for the contact long slab stated；In the rear side of the contact long slab, one permanent magnetic is set Iron；In the opening of the other end insertion spring of contact axle assemble；The other end of spring is inserted into driving arm, and in driving arm It is fixed.

2. a kind of contact plate disjunction structure of microswitch as described in claim 1, which is characterized in that the contact long slab In 7 font；The angle of short side bending part for contacting long slab is set as obtuse angle, in the short side of the contact long slab and described It contacts and First Transition circular arc is set between the long side of long slab；The first stationary contact is arranged in the lower section of the short side bending of the contact long slab Point.

3. a kind of contact plate disjunction structure of microswitch as described in claim 1, which is characterized in that the contact short slab In 7 fonts；The angle for contacting the short side bending part of short slab is set as acute angle, connects in the short side of the contact short slab with described It touches and the second transition arc is set between the long side of short slab；The second stationary contact is arranged in the top of the short side bending of the contact short slab Point.

4. a kind of contact plate disjunction structure of microswitch as described in claim 1, which is characterized in that the contact bridge group Part further includes button, bottom spring；Button is set in the top of driving arm, the semicircle orifice opened up above base is arranged in button It is interior；Bottom spring is set in the lower section of driving arm, bottom spring one end withstands driving arm, and the bottom spring other end withstands machine The bottom of seat.

5. a kind of contact plate disjunction structure of microswitch as claimed in claim 2, which is characterized in that first stationary contact It is non-parallel configuration between point and the second stationary contact, and movable contact is set between first stationary contact and the second stationary contact.