CN208352146U - A kind of load switch - Google Patents

Abstract

The utility model discloses a kind of load switches, including box body and the lid for being covered on box body, are equipped in box body for the load on off mechanism of connecting and disconnecting of the circuit where controlling load and for controlling the push card for loading on off mechanism on-off；Load on off mechanism include moving conductive piece, movable plate component, quiet conductive sheet, rivet or weld in movable plate component movable contact and rivet or weld in the stationary contact of quiet conductive sheet, movable plate component includes movable contact spring and splitter, splitter and movable contact spring are stacked together, one end of movable plate component and one end rivet or weld of moving conductive piece；Moving conductive on piece is inlaid with the current divider for circuital current where detecting load；Movable plate component can be pushed mobile to the direction close to or far from moving conductive piece for push card so that movable contact and stationary contact separation or contact.Using the load switch of the utility model, current divider can be built in box body, be occupied little space, install convenient.

Description

A kind of load switch

Technical field

The utility model relates to a kind of load switches, are applied to intelligent electric meter and industry certainly in particular to one kind The load switch of dynamic networked control systems.

Background technique

Currently, load switch is widely used in intelligent electric meter and industrialization automatic control system, and still, existing load Switch still has many defects, such as causes occupied space big since current divider is arranged at the outside of load switch, due to Circuit board installation caused by various conducting wire connections is inconvenient, and the volume of load switch itself is big, voltage endurance capability is small, shock resistance electric current Ability is poor, service life is short, temperature rise is high etc., to reduce the safety of load switch, brings certain safety hidden to client Suffer from.

For the above problem in the presence of the prior art, the new load switch of one kind is provided and is of great significance.

Utility model content

To solve the above problems, the utility model provides a kind of load switch, current divider can be built in box body, It occupies little space, install convenient.

To achieve the above object, the load switch of the utility model, including box body and the lid for being covered on the box body, institute It states and is equipped in box body for the load on off mechanism of connecting and disconnecting of the circuit where controlling load and for controlling the load on-off machine The push card of structure on-off；

The load on off mechanism includes moving conductive piece, movable plate component, quiet conductive sheet, rivet or weld in the movable plate group For the movable contact and rivet or weld of part in the stationary contact of the quiet conductive sheet, the movable plate component includes movable contact spring and shunting Piece, the splitter and movable contact spring are stacked together, the riveting of one end of one end of the movable plate component and the moving conductive piece or Welding；The moving conductive on piece is inlaid with the current divider for circuital current where detecting the load；

The push card movable plate component can be pushed mobile to the direction close to or far from the moving conductive piece so that The movable contact and stationary contact separation or contact.

Preferably, the moving conductive piece include the first moving conductive piece portion and the second moving conductive piece portion, the one of the current divider End is welded or riveted with the first moving conductive piece portion, and the other end is welded or riveted with the second moving conductive piece portion.

Preferably, for the splitter between the moving conductive piece and the movable contact spring, the movable contact spring includes first End and the second end, the first end of the movable contact spring and the splitter rivet or weld, the second end of the movable contact spring Portion offers the perforating worn for the movable contact, and the second end of the movable contact spring, which is located at around the perforating, to be opened up There is an arcuate socket, towards the first end of the movable contact spring, the push card can push the dynamic spring for the opening of the arcuate socket The second end of piece.

Preferably, at least one open slot is offered on the movable plate component along its length, the open slot is by institute It states movable plate component and is divided into several groups movable plate bar, rivet or weld has the movable contact on each movable plate bar.

Preferably, the pin of the current divider is welded with conducting wire, and the stretched out for the conducting wire is offered on the box body One opening.

Preferably, the through-hole stretched out for the pin of the current divider is offered on the lid.

Preferably, the microswitch for detecting the load on off mechanism on-off is also housed in the box body, it is described Microswitch is set to side of the push card far from the moving conductive piece, when the push card pushes the movable plate component to remote Direction from the moving conductive piece is mobile so that when the movable contact and stationary contact point contact, and the push card is touched the fine motion and opened It closes, the microswitch is connected；When the push card pushes the movable plate component to close to the movement of the direction of the moving conductive piece When so that the movable contact and stationary contact separating, the push card leaves the microswitch, and the microswitch disconnects.

Further, the microswitch is equipped with limited block, can be equipped on the microswitch and wear for the limited block If perforation, the lid is equipped with the protrusion being moved forward and backward for limiting the microswitch, is equipped with and uses in the box body In the baffle that the limitation microswitch moves up and down, the tray interior is equipped with and moves left and right for limiting the microswitch Limiting slot, one end of the limited block is butted on the baffle, and the other end passes through the perforation and is set to the limiting slot.

Preferably, the position that the box body is located at below the movable contact offers the first groove, and the lid is located at institute It states the position above movable contact and offers the second groove.

Preferably, the second opening stretched out for the quiet conductive sheet and moving conductive piece is offered on the box body, described the Reinforcing rib is equipped with around two openings.

Compared with prior art, the beneficial effect of the load switch of the utility model is:

1, by inlaying the current divider for circuital current where detecting load in moving conductive on piece, current divider is built in In box body, the occupied space of electric component can be saved.

2, by setting microswitch, state can be switched on-off by aware load in time；Further, by being opened in fine motion Shut the limited block that setting limits microswitch, it can be ensured that the stability of the detection signal of circuit where microswitch.

3, by opening up the pin stretching for the pin of current divider, the pin of coil block and microswitch on lid Through-hole, may be implemented to be not necessarily to external wire when by load switch installation on circuit boards, to reduce overall volume, Save material, install convenient.

4, elastic slice is replaced using the movable contact spring for offering arcuate socket, the production cost of load switch can be saved.

5, pass through the first groove of setting and the second groove, it can be ensured that the voltage endurance capability between movable contact and stationary contact；

6, by setting third groove, the voltage endurance capability between load on off mechanism and magnetic path can be improved；

7, by the first bending part of setting and the second bending part, box wall can be prevented towards inclination and distortion on the inside of box body.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the first embodiment of the load switch of the utility model, wherein box body and lid It is not shown；

Fig. 2 is the decomposition texture schematic diagram of the first embodiment of the load switch of the utility model；

Fig. 3 is the decomposition texture signal of the load on off mechanism of the first embodiment of the load switch of the utility model Figure；

Fig. 4 is the connection of the load on off mechanism and push card of the first embodiment of the load switch of the utility model Structural schematic diagram；

Fig. 5 is the moving conductive piece of the first embodiment of the load switch of the utility model and the connection structure of current divider Schematic diagram；

Fig. 6 is the structural schematic diagram of the first embodiment of the load switch of the utility model, and it illustrates box bodys；

Fig. 7 is the partial enlarged view in the portion A in Fig. 6；

Fig. 8 is the decomposition texture schematic diagram of microswitch and limited block in Fig. 7；

Fig. 9 is a cross-sectional view of the first embodiment of the load switch of the utility model, recessed it illustrates first Slot and the second groove；

Figure 10 is another cross-sectional view of the first embodiment of the load switch of the utility model, and it illustrates first Bending part and the second bending part；

Figure 11 is the company of the load on off mechanism and push card of second of embodiment of the load switch of the utility model Connect structural schematic diagram；

Figure 12 is that the decomposition texture of the load on off mechanism of second of embodiment of the load switch of the utility model shows It is intended to；

Figure 13 is the structural schematic diagram of the push card of second of embodiment of the load switch of the utility model；

Figure 14 is the structural schematic diagram of the movable plate component of second of embodiment of the load switch of the utility model；

Figure 15 is the structural schematic diagram of the movable contact spring of second of embodiment of the load switch of the utility model；

Figure 16 is the structural schematic diagram of the third embodiment of the load switch of the utility model, wherein box body and lid Body is not shown；

Figure 17 is the structural schematic diagram of the third embodiment of the load switch of the utility model, it illustrates box body and Lid；

Figure 18 is the structural schematic diagram of the 4th kind of embodiment of the load switch of the utility model, wherein box body and lid Body is not shown；

Figure 19 is the structural schematic diagram of the 4th kind of embodiment of the load switch of the utility model, it illustrates box body and Lid；

Figure 20 is a kind of decomposition of mode of the movable plate component of embodiment in the 4th of the load switch of the utility model Structural schematic diagram.

Specific embodiment

In the following, structure and working principle to the utility model etc. are further described in conjunction with attached drawing.

Fig. 1~Figure 10 shows the structural representation of each section of the first embodiment of the load switch of the utility model Figure.

Referring to Fig. 1, Fig. 2, the load switch of the utility model, including box body 100 and the lid 200 for being covered on box body 100, It is equipped in box body 100 for the load on off mechanism 300 of connecting and disconnecting of the circuit where controlling load and for controlling load on-off machine The push card 400 of 300 on-off of structure.

Referring to Fig. 3 and Fig. 1, Fig. 2 are combined, load on off mechanism 300 includes moving conductive piece 301, movable plate component, quiet conductive sheet 308, rivet or weld is in the movable contact 306 and rivet or weld of movable plate component in the stationary contact 307 of quiet conductive sheet 308.It is dynamic Conductive sheet 301 and quiet conductive sheet 308 all extend to outside box body 100, specifically, are offered on box body 100 for 301 He of moving conductive piece The second opening 101 that quiet conductive sheet 308 stretches out, in order to reinforce the intensity of second opening 101, avoid second opening 101 to It is deformed on the inside of box body 100, reinforcing rib 102 can be set around second opening 101.

Movable plate component includes movable contact spring 303 and splitter 304, and splitter 304 and movable contact spring 303 are stacked together, and moves spring Piece 303 is between splitter 304 and moving conductive piece 302, one end of movable plate component and one end riveting or weldering of moving conductive piece 301 It connects.In order to reduce the contact resistance of the load switch, temperature rise is reduced, is prolonged the service life, movable plate component can use double rod knot Structure, specifically, as shown in figure 3, offering a strip groove (not indicating in figure), strip groove on movable plate component along its length Movable plate component is divided into upper movable plate bar (not indicating in figure) and lower movable plate bar (not indicating in figure), on upper movable plate bar and lower movable plate bar Equal rivet or weld has a movable contact 306.There is confession in the end of lower movable plate bar close to the side rivet or weld of quiet conductive sheet 308 The elastic slice 305 that push card 400 pushes.Push card 400 can push movable plate component to the direction close to or far from moving conductive piece 301 Movement is so that movable contact 306 and the separation of stationary contact 307 or contact.

When arcing occurs between one of movable contact 306 and its corresponding stationary contact 307, the distance between two contacts is got over It is next smaller, but their distance change will not influence the movement of the movable contact 306 on another movable plate bar, from without it In arcing occurs between a movable contact 306 and its corresponding stationary contact 307, another movable contact 306 can not be moved normally The phenomenon that making, to extend the service life of the load switch.

Above-mentioned strip groove can also use the open slot of other shapes, such as lightning shape, V-arrangement, W-shaped etc., and hereafter second The open slot in lightning shape in embodiment is one such shape.Meanwhile above-mentioned strip groove may also be configured to it is a plurality of, Movable plate component is divided into several groups movable plate bar, rivet or weld has a movable contact on each movable plate bar, elastic slice should rivet or It is welded in several groups movable plate bar on the movable plate bar of bottom.

Referring to fig. 4 and Fig. 2 is combined, push card 400 has the first protrusion 401, the second protrusion 402 and third protrusion 403, elastic slice 305 is inserted between the first protrusion 401 and the second protrusion 402.Wherein, the first protrusion 401 and second Protrusion 402 is extended downwardly along the width direction of movable plate component, third protrusion 403 along movable plate component length direction to close The direction of movable contact 306 extends.Under original state, the corresponding stationary contact 307 of movable contact 306 on lower movable plate bar is in point From state, the corresponding stationary contact 307 of movable contact 306 on upper movable plate bar is in contact condition, so as to reduce push card 400 thrust, i.e., upper movable plate bar is relative to lower movable plate bar closer to quiet conductive sheet 308.

When push card 400 is to close to the movement of the direction of moving conductive piece 301, the second protrusion 402 can push elastic slice 305 To the direction movement far from quiet conductive sheet 308 so that the stationary contact 307 of movable contact 306 corresponding thereto on lower movable plate bar divides From, meanwhile, third protrusion 403 can push movable plate bar 309 to the direction movement far from quiet conductive sheet 308 so that upper movable plate The stationary contact 307 of movable contact 306 corresponding thereto on bar separates, at this point, the load switch disconnects；When push card 400 is to remote When direction from moving conductive piece 301 is mobile, the first protrusion 401 can push elastic slice 305 to the direction close to quiet conductive sheet 308 So that the stationary contact 307 of movable contact 306 corresponding thereto on lower movable plate bar contacts, upper movable plate bar is made in its own elastic force for movement It is resetted with lower so that the corresponding stationary contact 307 of movable contact 306 on upper movable plate bar contacts, at this point, the load switch is closed.

With continued reference to Fig. 4 and Fig. 1, Fig. 2 are combined, the reciprocating movement of push card 400 can be driven by magnetic path 500.It should Magnetic path 500 includes coil block, two yokes 507 and armature component, and coil block includes iron core (not shown), consolidates The skeleton 502 of fixed core and the coil 501 being wound on iron core, the both ends of skeleton 502 are equipped with inserts for what pin 504 was inserted into Hole 503；Armature component can drive push card 400 mobile to the direction close to or far from moving conductive piece 301, so that movable contact 306 and the separation of stationary contact 307 or contact comprising plastic casing 509 is equipped with two panels armature 511 in plastic casing 509 and is sandwiched in Permanent magnet (not shown) between two panels armature 511, plastic casing 509 are equipped with for driving push card 400 back and forth to move Dynamic driving handle 508 correspondingly offers the socket 404 being inserted into for driving handle 508 in push card 400；Two yokes 507 One end is separately fixed at the both ends of skeleton 502, and the other end is respectively between two sides insertion two panels armature 511；Armature component it is upper Side is equipped with top plate 505, and the upper and lower sides of plastic casing 509 are each formed with protruding shaft 510, correspondingly, 100 bottom of box body and top plate 505 On offer for protruding shaft 510 be inserted into shrinkage pool (not indicated in figure).

When pin 504 connects positive direct-current pulse voltage, the magnetic pole phase of the magnetic pole and permanent magnet that are generated after 501 excitation of coil Interaction, same polarity is mutually exclusive, and heteropolarity attracts each other, and armature component is enable to rotate counterclockwise around protruding shaft 510, to make It is mobile to the direction far from moving conductive piece 301 that driving handle 508 on plastic casing 509 drives push card 400, and then makes movable contact 306 and stationary contact 307 contact, load switch closure；When pin 504 connects anti-DC pulse voltage, enable armature component It is rotated clockwise around protruding shaft 510, so that the driving handle 508 on plastic casing 509 be made to drive push card 400 to close to moving conductive piece 301 direction is mobile, and then separates movable contact 306 and stationary contact 307, and load switch disconnects.

In order to save the occupied space of electric component, so that electric component is quickly and easily installed on circuit boards, move The current divider 302 for circuital current where detecting load can be inlaid on conductive sheet 301.Specifically, as shown in figure 5, dynamic lead Electric piece 301 includes the first moving conductive piece portion 3011 and the second moving conductive piece portion 3012, one end of current divider 302 and the first moving conductive Piece portion 3011 is welded, and the other end and the second moving conductive piece portion 3012 are welded.Certainly, current divider 302 can also be by other means It is connect with the first moving conductive piece portion 3011 and the second moving conductive piece portion 3012, such as the mode of riveting.

After load switch closure, according to Lorentz force, repulsive force can be generated between movable plate component and moving conductive piece 301, Between the two apart from smaller, repulsive force is bigger, which can form contact force to movable contact 306 so that movable contact 306 with Stationary contact 307 is kept in contact, and still, the moving conductive piece 301 of existing load switch is obliquely installed relative to movable plate component mostly, Cause one end repulsive force of 301 rivet or weld of movable plate component and moving conductive piece very big, and other end repulsive force very little, to lead Cause contact force very little that can be easy to open movable contact 306, break down when the load switch is by heavy current impact. In order to avoid the generation of above-mentioned failure, as shown in figure 4, moving conductive piece 301 is inlaid with the part of current divider 302 and movable plate component is put down Capable or less parallel, and it is formed with gap (not indicating in figure) with movable plate component, which leads to moving conductive piece 301 and movable plate The part and moving conductive piece 301 of assembly staking or welding are inlaid with the platform for being formed between the part of current divider 302 and having difference in height Rank, the presence of the step can reduce the repulsive force between movable plate component and moving conductive piece 301 moment, thus reduce moving conductive piece with The rivet or weld pressure of the part of movable plate assembly staking or welding.Ensuring that movable plate component will not touch moving conductive piece 301 Under the premise of, gap is the smaller the better, and moving conductive piece is inlaid with the length of the part of current divider, and the longer the better, to increase contact pressure Power improves the shock resistance current capacity of the load switch.

The pin 309 of current divider 302 can be directly welded on current divider 302, also can weld in the first moving conductive piece 301 On, as shown in figure 5, the pin 309 of current divider 302 is respectively welded at the first moving conductive piece portion 3011 and the second moving conductive piece portion On 3012, in order to connect with external instrument, the pin 309 of current divider 302 is welded with conducting wire 310, is offered on box body 100 for dividing Flow the first opening 103 that the conducting wire 310 of device 302 stretches out.

After load switch closure, the current density on the moving conductive piece 301 of existing load switch is broad in the middle, narrowing toward each end, It is caused to be concentrated mainly near strip groove the repulsive force of upper movable plate bar and lower movable plate bar, so as to cause upper movable plate bar and lower dynamic The repulsive force that piece bar is subject to is uneven and little, and then reduces contact force, reduces the shock resistance electric current of the load switch Ability.In order to improve shock resistance current capacity, as shown in figs. 3 and 5, on current divider 302 and the second moving conductive piece portion 3012 with item The opposite position of shape slot offers the first strip-shaped hole 3021 and the second strip-shaped hole 3013 respectively, first strip-shaped hole 3021 and second Strip-shaped hole 3013 is arranged so that the part of 3013 two sides of the first strip-shaped hole 3021 and the second strip-shaped hole respectively corresponds movable plate bar With lower movable plate bar, both repulsive force suffered by upper movable plate bar and lower movable plate bar concentrates on respectively respective middle position is repelled Power increases, and contact force increases with it, and the ability of load switch shock resistance electric current also correspondinglys increase.Meanwhile first strip-shaped hole 3021 and second the setting of strip-shaped hole 3013 can also increase area of section, increase heat dissipation capacity, reduce security risk, extend load The service life of switch.

Referring to Fig. 6 and Fig. 1, Fig. 2 is combined to be also housed in box body 100 in order to which timely aware load switches on-off state For detecting the microswitch 600 of load 300 on-off of on off mechanism, microswitch 600 is set to push card 400 far from moving conductive piece 301 side, when push card 400 pushes movable plate component mobile to the direction far from moving conductive piece 301 so that movable contact 306 and quiet When contact 307 contacts, push card 400 touches microswitch 600, and microswitch 600 is connected；When push card 400 pushes movable plate group When part is to close to the movement of the direction of moving conductive piece 301 so that movable contact 306 and stationary contact 307 separate, push card 400 leaves fine motion Switch 600, microswitch 600 disconnect.The pin 601 of microswitch 600 can be connect with external circuit by conducting wire 602, box body The third opening 104 stretched out for the conducting wire 602 is offered on 100.

Referring to Fig. 7, Fig. 8 and Fig. 2, Fig. 6 are combined, in order to ensure the stabilization of the detection signal of 600 place circuit of microswitch Property, limited block 603 can be arranged on microswitch 600 will not be changed with the position for ensuring microswitch 600, specifically, The perforation 604 worn for limited block 603 can be equipped on microswitch 600, lid 200 is equipped with for limiting microswitch 600 The 4th protrusion 201 being moved forward and backward, box body 100 is interior to be equipped with the baffle 105 moved up and down for limiting microswitch 600, box 100 inner wall of body is equipped with the limiting slot 106 moved left and right for limiting microswitch 600, and one end of limited block 603 is butted on baffle 105, the other end passes through perforation 604 and is inserted in limiting slot 106.Wherein, " front and back ", " upper and lower ", " left and right " and attached drawing 6 itself Front and back, up and down, left and right direction it is consistent, but not to the structure of the utility model rise restriction effect.

When arcing occurs for movable contact 306 and stationary contact 307, it is attached to the silver gasification of contact surface, silver powder disperse is in box On the inner wall of body 100.In order to reduce volume, the movable contact 306 of existing load switch away from the distance of 100 inner wall of box body all very Small, when arcing occurs, the creepage distance between movable contact 306 and stationary contact 307 becomes smaller, and voltage endurance capability is caused to become smaller, and influences to bear The service life of load switch.Therefore, in the case where ensuring that volume is sufficiently small, in order to ensure voltage endurance capability, movable contact 306 and quiet is avoided Creepage distance between contact 307 becomes smaller, as shown in figure 9, can be located at the position below movable contact 306 in box body 100 opens up One groove 107 is located at the position above movable contact 306 in lid 200 and offers the second groove 202, the first groove 107 and second The moving range of the span covering movable contact 306 of groove 202, it is ensured that certain creepage distance.

Equally, as shown in Figure 1, in order to improve the voltage endurance capability between load on off mechanism 300 and magnetic path 500, top The both ends of plate 505 offer third groove 506, with increase load on off mechanism 300 and magnetic path 500 between climb electricity away from From raising voltage endurance capability.

Since the wall surface of box body 100 is very thin, in the case where heated, 100 wall surface of box body is easy to tilt on the inside of box body 100 Deformation, for example, be easy to stop the movement of push card 400, it is negative to influence this after the wall surface deformation of the box body 100 of push card 400 The closure of load switch, therefore, 100 wall surface of box body deforms in order to prevent, as shown in Figure 10, can be formed in 100 opening of box body First bending part 100a is formed with the second bending part 200a that can be plugged on the inside of the first bending part 100a on the downside of lid 200, Second bending part 200a can prevent 100 wall surface of box body to 100 inside inclination and distortion of box body.

The structure that Figure 11~Figure 15 shows each section of second of embodiment of the load switch of the utility model is shown It is intended to.

The difference of the load switch of the load switch and the first embodiment of the embodiment is: load on off mechanism 300 ' structure is different, and that eliminates the elastic slices 305 in the load on off mechanism 300 in the first embodiment, has saved this The production cost of load switch.

Specifically, as shown in figure 12, the splitter 304 ' of the movable plate component in the embodiment is located at moving conductive piece 301 ' Between movable contact spring 303 ', movable contact spring 303 ' includes first end and the second end, the first end of movable contact spring 303 ' and shunting Piece 304 ' rivets, and the second end of movable contact spring 303 ' offers the perforating 312 ' worn for movable contact 306 ', movable contact spring 303 ' The second end be located at around the perforating 312 ' and offer arcuate socket 313 ', the opening of the arcuate socket 313 ' is towards movable contact spring The biggish elasticity of the second end of the movable contact spring 303 ' may be implemented by opening up the arcuate socket 313 ' in 303 ' first end Deformation, to substitute the elastic slice 305 in first embodiment, it is preferable that the movable contact spring 303 ' uses elastic conducting material.Such as Figure 15 Shown, the shape of above-mentioned arcuate socket 313 ' is substantially u-shaped, and open end is located at the center of circle of perforating 312 ' close to movable contact spring 303 ' First end side, to ensure the elastic deformation amount of the second end of movable contact spring 303 '.Certainly, above-mentioned arcuate socket 313 ' is gone back The hole of other shapes can be used, to increase the elastic deformation amount of movable contact spring 303 '.

Equally, in order to reduce the contact resistance of the load switch, temperature rise is reduced, is prolonged the service life, movable plate component can be with Using double-rod structure, specifically, offers an open slot 314 ' along its length as shown in figure 14, on movable plate component, open Movable plate component is divided into upper movable plate bar (not indicating in figure) and lower movable plate bar (not indicating in figure) by mouth slot 314 ', and upper movable plate bar is under Riveting has a movable contact 306 ' on movable plate bar.Movable contact spring 303 ' is divided into upper movable contact spring 315 ' and moved with lower by the open slot 314 ' Reed 316 ', wherein above-mentioned arcuate socket 313 ' is opened on lower movable contact spring 316 '.Wherein, above-mentioned open slot 314 ' is in lightning shape.

Push card 400 ' can push the second end of movable contact spring 303 ', embodiment party in the structure of push card 400 ' and first The structure of push card 400 in formula is roughly the same, specifically, referring to Figure 11 and combines Figure 12~Figure 15, push card 400 ' has First protrusion 401 ', the second protrusion 402 ' and third protrusion 403 ', lower movable contact spring 316 ' have the one of arcuate socket 313 ' End is inserted between the first protrusion 401 ' and the second protrusion 402 '.Wherein, the first protrusion 401 ' and the second protrusion 402 ' extend downwardly along the width direction of movable plate component, third protrusion 403 ' along movable plate component length direction to close to dynamic touching The direction of point 306 ' extends.Under original state, the corresponding stationary contact 307 ' of movable contact 306 ' on lower movable plate bar is in point From state, the corresponding stationary contact 307 ' of movable contact 306 ' on upper movable plate bar is in contact condition, pushes so as to reduce The thrust of card 400 ', i.e., upper movable plate bar is relative to lower movable plate bar closer to quiet conductive sheet 308 '.

When push card 400 ' is to close to the movement of the direction of moving conductive piece 301 ', the second protrusion 402 ' can push lower dynamic Reed 316 ' has one end of arcuate socket 313 ' mobile to the direction far from quiet conductive sheet 308 ' so that dynamic touching on lower movable plate bar The stationary contact 307 ' of point 306 ' corresponding thereto separates, meanwhile, third protrusion 403 ' can push movable plate bar to far from quiet The direction of conductive sheet 308 ' is mobile so that the stationary contact 307 ' of movable contact 306 ' corresponding thereto on upper movable plate bar separates, this When, which disconnects；When mobile to the direction far from moving conductive piece 301 ' when push card 400 ', 401 ' energy of the first protrusion It is enough to push lower movable contact spring 316 ' that there is the direction movement of one end of arcuate socket 313 ' to close quiet conductive sheet 308 ' so that lower movable plate The stationary contact 307 ' of movable contact 306 ' on bar corresponding thereto contacts, upper movable plate bar resetted under the effect of its own elastic force so that The corresponding stationary contact 307 ' of movable contact 306 ' on upper movable plate bar contacts, at this point, the load switch is closed.

In order to avoid the one end for causing lower movable contact spring 316 ' to have arcuate socket 313 ' because of moving for push card 400 ' is detached from Push card can have one end of arcuate socket 313 ' that third bending part 311 ', the third bending part is arranged in lower movable contact spring 316 ' 311 ' can hook the first protrusion 401 ' or the second protrusion 402 ' in push card 400 ', to limit push card 400 ' along dynamic The movement in piece length component direction.

The other structures of the load switch are identical as the structure of the load switch of first embodiment, no longer superfluous herein It states.

Figure 16, Figure 17 shows the structural schematic diagrams of the third embodiment of the load switch of the utility model.

Referring to Figure 16, Figure 17, the load switch of the embodiment can be used for installing on circuit boards, with the first implementation The difference of the load switch of mode is: the pin of pin 309 for current divider 302, coil block is offered on lid 200 504 and microswitch 600 pin 601 stretch out through-hole (not indicated in figure), this structure, be not necessarily to external wire, reduce Overall volume saves material, and install convenient.

The other structures of the load switch are identical as the structure of the load switch of first embodiment, no longer superfluous herein It states.

Figure 18, Figure 19 show the structural schematic diagram of the 4th kind of embodiment of the load switch of the utility model.

Referring to Figure 18,19, the load switch of the embodiment can be used for installing on circuit boards, with first embodiment The difference of load switch be: its movable plate component uses single pole structure, i.e., does not offer along its length on movable plate component Strip groove, only one movable contact 306 and stationary contact 307, suitable for the load circuit of low current, in order to reduce the load switch Volume, keep its overall structure more compact, the not set microswitch 600 of the load switch, and by the cloth of magnetic path 500 Set the direction volume to further decrease the load switch vertical with the arranged direction of magnetic path 500 of first embodiment.

Equally, it offers on the lid 200 in the embodiment for the pin 309 of current divider 302 and drawing for coil block The through-hole (not indicating in figure) that foot 504 stretches out, this structure are not necessarily to external wire, reduce overall volume, save material, and Install convenient.

Equally, as a preferred method, as shown in figure 20, the movable plate component in the embodiment also can be used such as second The form of movable plate component in kind embodiment, that is, save elastic slice, open up arc around the perforating 312 " of movable contact spring 303 " Shape hole 313 ", to save production cost.

More than, the only schematic description of the utility model, it will be recognized by those skilled in the art that practical without departing from this On the basis of novel working principle, a variety of improvement can be made to the utility model, this belongs to the protection of the utility model Range.

Claims (10)

1. a kind of load switch, which is characterized in that including box body and the lid for being covered on the box body, be equipped in the box body Push card for the load on off mechanism of connecting and disconnecting of the circuit where controlling load and for controlling the load on off mechanism on-off；

The load on off mechanism includes moving conductive piece, movable plate component, quiet conductive sheet, rivet or weld in the movable plate component In the stationary contact of the quiet conductive sheet, the movable plate component includes movable contact spring and splitter, institute for movable contact and rivet or weld It states splitter and movable contact spring is stacked together, one end rivet or weld of one end of the movable plate component and the moving conductive piece； The moving conductive on piece is inlaid with the current divider for circuital current where detecting the load；

The push card can push the movable plate component to the direction movement close to or far from the moving conductive piece so that described Movable contact and stationary contact separation or contact.

2. load switch as described in claim 1, which is characterized in that the moving conductive piece includes the first moving conductive piece portion and the Two moving conductive piece portions, one end of the current divider are welded or riveted with the first moving conductive piece portion, the other end and described second Moving conductive piece portion welds or rivets.

3. load switch as described in claim 1, which is characterized in that the splitter is located at the moving conductive piece and described dynamic Between reed, the movable contact spring includes first end and the second end, the first end of the movable contact spring and the splitter riveting It connecing or welds, the second end of the movable contact spring offers the perforating worn for the movable contact, and the second of the movable contact spring End, which is located at around the perforating, offers arcuate socket, the first end of the opening of the arcuate socket towards the movable contact spring Portion, the push card can push the second end of the movable contact spring.

4. load switch as described in claim 1, which is characterized in that offered along its length on the movable plate component to The movable plate component is divided into several groups movable plate bar by a few open slot, the open slot, on each movable plate bar riveting or It is welded with the movable contact.

5. load switch as described in claim 1, which is characterized in that the pin of the current divider is welded with conducting wire, the box The first opening stretched out for the conducting wire is offered on body.

6. load switch as described in claim 1, which is characterized in that offer the pin for the current divider on the lid The through-hole of stretching.

7. load switch as described in claim 1, which is characterized in that be also housed in the box body for detecting the load The microswitch of on off mechanism on-off, the microswitch are set to side of the push card far from the moving conductive piece, work as institute Stating push card pushes the movable plate component to the direction movement far from the moving conductive piece so that the movable contact and stationary contact connect When touching, the push card touches the microswitch, and the microswitch is connected；When the push card pushes the movable plate component When to close to the movement of the direction of the moving conductive piece so that the movable contact and stationary contact separate, the push card is left described micro- Dynamic switch, the microswitch disconnect.

8. load switch as claimed in claim 7, which is characterized in that the microswitch is equipped with limited block, the fine motion The perforation worn for the limited block can be equipped on switch, the lid is equipped with to be moved forward and backward for limiting the microswitch Protrusion, the baffle moved up and down for limiting the microswitch is equipped in the box body, the tray interior, which is equipped with, to be used In the limiting slot that the limitation microswitch moves left and right, one end of the limited block is butted on the baffle, and the other end passes through institute It states and perforates and be inserted in the limiting slot.

9. load switch as described in claim 1, which is characterized in that open the position that the box body is located at below the movable contact Equipped with the first groove, the position that the lid is located above the movable contact offers the second groove.

10. load switch as described in claim 1, which is characterized in that offer on the box body for the quiet conductive sheet and The second opening that moving conductive piece stretches out, the second opening surrounding are equipped with reinforcing rib.