CN2842715Y

CN2842715Y - Socket-type earthing fault line breaker with reverse-wiring protection function

Info

Publication number: CN2842715Y
Application number: CN 200520002195
Authority: CN
Inventors: 王平
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-01
Filing date: 2005-02-08
Publication date: 2006-11-29
Anticipated expiration: 2015-02-08

Abstract

The utility model relates to a kind of socket type earth-fault line-breaker of female type, is called for short GFCI.Comprise reset key, a pair of movable contact spring, a pair of static contact, leakaging signal detecting circuit and be subjected to its control and the electromagnetic trip mechanism of moving; it is characterized in that: described GFCI does not also have the reverse wiring protective device, and described reverse wiring protective device comprises release link, back-moving spring, dropout spring, reset cradle, oppositely resilient support mechanism and electromagnetic trip mechanism and grip tab, contact-making switch.This reverse wiring protective device is in the following time of situation of wiring error; when pressing reset key; moving contact that the input power supply is separated and fixed contact are isolated; can not produce the electric leakage analog signal; electromagnetic trip mechanism is failure to actuate, and GFCI can not reset, and setter is played the effect of a prompting; thereby the effect of safeguard protection is played in the correct wiring of door guiding.

Description

Socket type earth-fault line-breaker with reverse wiring protection function

Technical field:

The utility model relates to a kind of earth fault line breaker of female type, abbreviates GFCI as.

Background technology

Development through two more than ten years, in GFCI manufacturer, be engaged under personnel's such as correlative study, exploitation and test the joint efforts struggle and research of technique, no matter GFCI is on product quality, still in specification requirement and the satisfied requirement of using, all reached higher level, but in actual use, still have some shortcomings, improve waiting.Existing common GFCI comprises pedestal usually; be provided with the loam cake of jack; tripping mechanism; reset key; feeler switch; grounding assembly; power supply input coupling assembling; the load coupling assembling; not only can provide power supply for load by the jack of loam cake; can also be by the load coupling assembling to connecting electric thereon; and two groups of coupling assemblings are closely similar; therefore in installing and using process, occur power line is connected the anti-situation that connects with load through regular meeting; at this moment; GFCI exists the hidden danger that causes the person and property damage because of electric shock with regard to not being to be equipped with creepage protection function and only to be equivalent to a common socket.

Content of the present utility model

The purpose of this utility model is to provide a kind of simple and reliable for structure for overcoming the deficiencies in the prior art, is easy to the earth fault line breaker with rhetorical question wiring protection function of production and processing.

The utility model is that the achieve the above object technical solution that adopted is as follows: a kind of earth fault line breaker with rhetorical question wiring protection function, comprise reset key, a pair of movable contact spring, a pair of static contact, leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action, on movable contact spring and the static contact respectively rivet clasp moving contact and fixed contact are arranged, it is characterized in that: described earth fault line breaker does not also have the reverse wiring protective device, described reverse wiring protective device comprises release link, back-moving spring, the dropout spring, reset cradle, reverse resilient support mechanism and electromagnetic trip mechanism and grip tab, contact-making switch, described release link tail end is fixedlyed connected with reset key, the other end is provided with ring-type snap close draw-in groove, the end is taper, back-moving spring and dropout spring housing are located on the release link, described reset cradle is a tubular element, bilateral symmetry crosses out a pair of trailing arm, described a pair of movable contact spring is separately positioned on the trailing arm top, the static contact correspondence is arranged on the movable contact spring top, moving contact is relative with fixed contact, reset cradle moves along axis and drives movable contact spring and make moving contact closed with fixed contact or separate, release link and reset cradle central through hole are movingly and be inserted in the tool, described reverse resilient support mechanism and release link, the coaxial setting of reset cradle, the elastic force direction is relative with release link to constitute flexible restoring organ to the support of reset cradle formation elastic floating; Described grip tab one end is converted into " U " type, and described electromagnetic trip mechanism bag is picked up tripping coil support, tripping coil and dropout iron core and iron core spring, and axis and flexible restoring organ axis are perpendicular; Described reset cradle is provided with width and is slightly larger than grip tab, the notch vertical with the reset cradle central shaft, " U " the type end and the dropout iron core of described grip tab are connected, another relative with " U " type end be distolateral to be provided with slightly larger in diameter and to constitute bayonet socket and penetrate in the described notch in the circular hole of release link, and can be under the traction of dropout iron core slide before and after in notch, before and after the displacement of sliding should be able to make bayonet socket be the release link end part aligning and stagger between conversion, described bayonet socket and snap close draw-in groove formation buckle structure; Described contact-making switch is pressed state and is connected the electric leakage signal simulation branch road that test resistance constitutes under reset key, return to form to disconnect electric leakage signal simulation branch road.

Described reset cradle lower end fixedly is embedded eight of metallic support, be fixed with the reverse iron core of column vertically downward on the support chip, the guide hole that is provided with diameter and reverse iron core through hole formation movingly of correspondence position under reverse iron core, the outer sheathed counteracting spring follower head of described reverse iron core inserts the reverse resilient support of formation mechanism in the described guide hole.

Lug that described contact-making switch is protruded by side direction on arbitrary movable contact spring and the corresponding copper contact chip that is arranged under the lug are formed, described copper contact chip and test resistance are electrically connected, and series arm two tip nodes that test resistance, contact-making switch are formed are connected across respectively between two power lines of power input LINE side of dynamic and static contact.

Described dropout iron core outboard end does not have boss, and the boss root is provided with annular recess; Described grip tab " U " shape end is provided with the breach that matches with described annular recess, and described breach is stuck in and constitutes interlock on the annular recess.

The breach that described grip tab " U " shape end is provided with is " U " shape.

Owing to be provided with the rhetorical question Wiring protection device at earth fault line breaker; if it is accidentally that power input and load wiring termination is anti-; when pressing reset key lug that side direction on the movable contact spring arm is protruded contacted with the copper contact chip; moving contact that the input power supply is separated and fixed contact are isolated; can not produce the electric leakage analog signal; electromagnetic trip mechanism is failure to actuate; earth fault line breaker can not reset; setter is played the effect of a prompting; thereby guide correct wiring, play the effect of safeguard protection.

The utility model is described in further detail below in conjunction with accompanying drawing.

Description of drawings:

Accompanying drawing 1 is the utility model specific embodiment schematic appearance;

Accompanying drawing 2 is for removing the internal structure schematic diagram behind the loam cake in the accompanying drawing;

Accompanying drawing 3 reaches with the perspective view behind the top for removing middle base in the accompanying drawing 2;

Accompanying drawing 4 is for being in the cut-away view of reset mode along the A-A direction in the accompanying drawing 1;

Accompanying drawing 5 is for being in the cut-away view of trip status along the A-A direction in the accompanying drawing 1;

Accompanying drawing 6 be in the accompanying drawing 1 along the cutaway view of B-B direction, and be in the figure of trip status situation;

Accompanying drawing 7 is for being pressed the cutaway view of the state of the iron core that resets contact grip tab upper surface along B-B opposite direction and reset key in the accompanying drawing 1;

Accompanying drawing 8 in the accompanying drawing 1 along B-B in the other direction and be in the cutaway view of reset mode;

Accompanying drawing 9 is the cutaway view of the state that is not depressed along C-C direction feeler switch in the accompanying drawing 1;

Accompanying drawing 10 is the cutaway view of the state that is depressed along C-C direction feeler switch in the accompanying drawing 1;

Accompanying drawing 11 is removed middle base for specific embodiment and is reached with the vertical view behind the top;

Accompanying drawing 12 is the view after accompanying drawing 3 is removed base;

Accompanying drawing 13 is the three-dimensional exploded view of accompanying drawing 12;

Accompanying drawing 14 is the three-dimensional exploded view of the utility model specific embodiment;

Accompanying drawing 15 is the electronic circuit schematic diagram of the utility model specific embodiment.

Embodiment:

Shown in Fig. 1-4, the whole rectangular body of GFCI socket, housing is divided into

pedestal

120 and 102 liang of parts of loam cake, loam cake 102 is provided with two groups of socket apertures 160,130 1 feeler switchs 140 of 106 and reset keys, the L shaped contact chip 230 that feeler switch 140 belows are provided with, in pedestal 120 inner chambers, a substrate 350 of being made by printed wire is set, electromagnetic trip mechanism along the length direction of socket arrange be fixedly mounted on substrate 350 back ofs the body and on, after coiling 420, tripping coil frame in the electromagnetic trip mechanism is horizontally fixed on the substrate 350, the tripping coil frame is provided with magnetic force iron core 430 and U-shaped pure iron sheet 440 towards substrate 350 edges one end, U-shaped pure iron sheet 440 is clipped in outside the tripping coil frame, magnetic force iron core 430 is fixedlyed connected with U-shaped pure iron sheet 440, dropout iron core 410 sheathed upper core springs 400 backs are inserted in the tripping coil frame central shaft hole slidably from the other end, dropout iron core 410 outboard ends do not have boss, and there is not annular recess at the boss root, grip tab 390 is made by the strip stainless steel substrates, one end offers the breach that matches with described annular recess, and be bent into " U " shape and make it have better elasticity, described breach is stuck in and constitutes interlock on the described annular recess, described breach can be the shape that any and annular recess match, but is good with " U " shape; Test coil in the electric-leakage detection circuit and neutral coil 500 are stacked and placed in the cylindric magnet ring seat, be provided with annular gasket between test coil and the neutral coil 500, other electron component is fixedly mounted on equally on the substrate 350 and by the printed wiring on it is corresponding with the magnet ring seat and is connected in the electric-leakage detection circuit, position between electromagnetic trip coil 420 and the magnet ring seat is provided with the resetting means seat, reset key 130 over against the top, release link 460 tail ends are fixedlyed connected with reset key 130, the other end is provided with ring-type snap close draw-in groove, the end is taper, reset cradle 280 is a tubular element, in this concrete enforcement is square, reset cradle 280 places resetting means seat center, reset cradle 280 two opposite sides symmetric transverse are stretched out a pair of trailing arm 282,284, sheathed back-moving spring 240 and dropout spring 450 on the release link 460, release link 460 and reset cradle 280 central through holes are movingly and be inserted in wherein, reset cradle 280 lower ends fixedly are embedded metallic support sheet 380, be fixed with the reverse iron core 370 of column vertically downward on the support chip 380, the substrate 350 of correspondence position is provided with the guide hole of diameter and reverse iron core 370 through hole formation movingly under the reverse iron core 370, the reverse resilient support of formation mechanism in the described guide hole is inserted in described reverse iron core 370 outer sheathed counteracting spring 360 rear ends, described reverse resilient support mechanism and release link 460, reset cradle 280 coaxial settings, the elastic force direction constitutes elastic floating with release link 460 relative formation flexible restoring organs to reset cradle 280 and supports, make reset cradle 280 under the guiding of described guide hole and release link 460, can in certain scope, move axially, static contact is embedded in the slot of pedestal 120 both sides fixing, its contact 224,226 extend out to trailing arm 282 to the centre, 284 side top, movable contact spring 250,260 are converted into " L " shape, one end penetrates on the magnet ring center is inserted at the bottom of pedestal 120 chambeies admittedly, another free end places trailing arm 282 respectively, 284 and static contact between, moving contact 220 and static contact 224,226 is relative, copper contact chip 310 is arranged on the resetting means seat wall, the movable contact spring 250 of respective side, the lug 255 that side direction is protruded on the arm, be arranged on the left side in the present embodiment, can certainly be arranged on the right side, constitute a contact-making switch directly over the copper contact chip 310 that lug 255 is in, described copper contact row 310 is electrically connected with test resistance, makes test resistance, series arm two tip nodes that contact-making switch is formed are connected across respectively between two power lines of power input LINE side of active and static contact and constitute electric leakage signal simulation branch road; Yoke 110 geometrical clamps are installed between pedestal 120 and loam cake 102,120 of loam cake 102 and pedestals are linked into an integrated entity by the screw that is arranged on four jiaos.

Below the utility model leakaging signal detecting circuit is described:

As shown in figure 15, diode D1-D4 and resistance R 3, capacitor C 3 constitutes rectification and filter circuit provides the current DC power supply for control circuit, it exchanges end and is connected with power input LINE, electromagnetic trip coil 420 1 ends are connected with one of input power cord, the other end is connected to the controllable silicon SCR positive pole and is connected with another input power cord with rectifier bridge through controllable silicon SCR, the controllable silicon SCR negative pole is connected with the direct current negative pole, the electric leakage signal amplifying circuit is selected the RV4145 integrated circuit for use, article two, power line all passes test magnetic ring coil and neutral magnetic ring coil, the output of test magnetic ring coil and neutral magnetic ring coil all is connected to electric leakage signal and amplifies on the integrated RV4145, electric leakage signal amplifies the control output end of integrated RV4145 and passes through the trigger electrode that resistance R 5 is connected to controllable silicon SCR, for improving interference free performance, prevent false triggering, between the trigger electrode of controllable silicon SCR and negative pole in parallel on anti-interference capacitor C5.

To be described in further detail the course of work of the present utility model below:

Shown in Fig. 5-8, female type GFCI is under trip status, be in of the return action of the counteracting spring 360 of compressive state because of elastic force, thereby promoting reset cradle 280 moves upward, cause being placed on the left movable contact spring 250 that has the contact above the reset cradle 280, right movable contact spring 260 moves together, lug 255 on the left movable contact spring 250 is separated with copper contact chip 310, that is to say, GFC1 is under trip status, counteracting spring 360 affranchise state elastic force with a left side, right movable contact 250, when 260 reclinate elastic force reached identical, lug 255 positions and the copper contact chip 310 of left movable contact spring 250 were in off-state.

Contacting correct following time of situation, press reset key 130, make down by the elastic force of making every effort to overcome clothes back-moving spring 240, because release link 460 adds the injection moulding in man-hour in one in reset key 130, so release link 460 also can and then move downward.Because the centre bore of reset cradle 280 and the bayonet socket 395 of grip tab 390 stagger fully, so the tapering point of release link 460 withstands on the upper surface of grip tab 390, have driven reset cradle 280 and have moved downward with grip tab 390, compress counteracting spring 360 then.At this moment, left and right movable contact spring also moves downward under self elastic-restoring force effect, until lug 255 positions of left movable contact spring contact copper contact chip 310, and copper contact chip 310 is to contact with the lead-in wire of an end lead of test resistance, in such cases, just be equivalent to by a feeler switch 140, produced an electric leakage analog signal, cause tripping coil 420 charged work, make dropout iron core 410 actions in the tripping coil 420.The action force of dropout iron core 410 with regard to overcoming release link 460 tapered tip and grip tab 390 tables frictional force and the elastic force of iron core spring 400, because the neck of dropout iron core 410 is because in the bayonet socket 395 of grip tab 390, so dropout iron core 410 moves with regard to pulling grip tab 390, is in concentric position until the centre bore of reset key 280 and the bayonet socket 395 of grip tab 390; At this moment, reset key 130 promotes the bayonet socket 395 that release link 460 is passed grip tab 390, simultaneously, counteracting spring 360 fully stretches, overcome a left side, right movable contact spring 250,260 self the crooked elastic restoring force that produce and the elastic force of dropout spring 450, promote a reset cradle 280 and a left side, right movable contact spring 250,260 move upward together, lug 255 positions and the copper contact chip 310 of left movable contact spring 250 are separated, so, electric leakage signal disappears thereupon, tripping coil 420 is not charged, also stop motion of dropout iron core 410, iron core spring 400 down, promote grip tab 390 and move together about elastic-restoring force, make bayonet socket 295 dislocation of reset cradle 280 centre bores and grip tab 390, cause bayonet socket 395 on the grip tab 390 to block the ring-type snap close draw-in groove place of release link 460.After eliminating by power under the adding of reset key 130, back-moving spring 240 overcomes a left side, the elastic-restoring force of self bending of right movable contact spring and dropout spring 450 are compressed the back and the elastic-restoring force that produces drives reset cradle 280 and moves upward together, a because left side, right movable contact spring 250,260 arm places reset cradle 280 left sides respectively, the trailing arm 282 of right two ends, on 284, so, a left side, right movable contact spring 250,260 also move upward together, until a left side, right movable contact spring 250, contact on 260 arms and a left side, right static contact 200, corresponding contact contacts on 210 arms, and a left side, right static contact 200, the 210th, static and be fixed in the corresponding position of GFCI inside, realized resetting of GFCI.

As Fig. 9, shown in 10, after pressing feeler switch 140, L shaped contact chip 230 under it is contacted with test resistance 320 1 end conductor leadings, or GFCI place circuit has the existence of leakage current for a short time, this electric leakage signal will amplify by the leakaging signal detecting circuit of GFCI inside, triggering controllable silicon SCR makes tripping coil 420 charged and in running order, 410 actions of dropout iron core, make the bayonet socket 395 of reset cradle 280 centre bores and grip tab 390 be in concentric position, the release link 460 of pinning is released, reset key 130 and release link 460 move upward under the elastic-restoring force effect of back-moving spring 240, get back to the initial position under the trip status.After release link 460 is released, reset cradle 280 is under the acting in conjunction of the elastic force of dropout spring 450 and left and right movable contact spring 250,260 elastic-restoring forces, move downward, converge and be in poised state until elastic force with counteracting spring 360, and this moment, corresponding contact 224,226 is in phase-separated state on contact 220,222 on the left and right movable contact spring 250,260 and left and right static contact 200,210 arms, thereby realizes the dropout of GFCI.

In the following time of situation of wiring error; after pressing reset key 130; left and right movable contact spring reset cradle 280 is along with grip tab 390 moves downward together; lug 255 until left movable contact spring contacts with copper contact chip 310; copper contact chip 310 contacts with the lead-in wire of test resistance one end lead again, but this moment is because separated moving contact 220 and fixed contact 224,226 isolation of input power supply can not produce the electric leakage analog signal; electromagnetic trip mechanism is failure to actuate, and the reverse wiring protective device can not reset GFCI.Because the centre bore of reset cradle 280 and the bayonet socket 395 of grip tab 390 still are in the dislocation state, so release link 460 can not be blocked by grip tab 390, after the external power that imposes on reset key 130 is removed, reset key 130 and release link 460 move upward under the elastic-restoring force effect of back-moving spring 240, get back to the initial position under the trip status.The elastic force of counteracting spring 360 overcomes the elastic force and the crooked elastic-restoring force that produces of left and right movable contact spring of dropout spring 450, promote reset cradle 280 and spur snap close 390 to move upward together, also promoting left and right movable contact spring 250,260 moves upward together, until the balance that reaches upper and lower strength, but the contact 220,222 on the movable contact spring 250,260 can not contact with the contact 222,224 on the static contact 200,210 at this moment, and reset key 130 still is in the situation under the trip status.

Though the GFCI with 20A of the present utility model is that example illustrates, but socket part for the GFCI of 15A, and have an indicating lamp structure, its operation principle all is the same, for 15A, inserted sheet shape difference to some extent only, for peculiar indicating lamp structure, the closed hill path that electronic components such as many LED, resistance, diode form in the electronic circuit only.So in this no longer repeat specification.

Claims

1, a kind of socket type earth-fault line-breaker with reverse wiring protection function, comprise reset key (130), a pair of movable contact spring (250,260), a pair of static contact (200,210), leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action, on movable contact spring and the static contact respectively rivet clasp moving contact (220) and fixed contact (224 are arranged, 226), it is characterized in that: described earth fault line breaker does not also have the reverse wiring protective device, described reverse wiring protective device comprises release link (460), back-moving spring (240), dropout spring (450), reset cradle (280), reverse resilient support mechanism and electromagnetic trip mechanism and grip tab (390), contact-making switch, described release link (460) tail end is fixedlyed connected with reset key (130), the other end is provided with ring-type snap close draw-in groove, the end is taper, back-moving spring (240) and dropout spring (450) are set on the release link (460), described reset cradle (280) is a tubular element, bilateral symmetry crosses out a pair of trailing arm (282,284), described a pair of movable contact spring (250,260) be separately positioned on trailing arm (282,284) top, the static contact correspondence is arranged on the movable contact spring top, moving contact (220,222) and fixed contact (224,226) relative, reset cradle (280) moves the drive movable contact spring along axis and makes moving contact (220) and fixed contact (224,226) closed or separation, release link (460) and reset cradle (280) central through hole are movingly and be inserted in the tool, described reverse resilient support mechanism and release link (460), the coaxial setting of reset cradle (280), the elastic force direction is relative with release link (460) to constitute flexible restoring organ to the support of reset cradle (280) formation elastic floating; Described grip tab (390) one ends are converted into " U " type, and described electromagnetic trip mechanism bag is picked up tripping coil support, tripping coil (420) and dropout iron core (410) and iron core spring (400), and axis and flexible restoring organ axis are perpendicular; Described reset cradle (280) is provided with width and is slightly larger than grip tab (390), with the vertical notch of reset cradle (280) central shaft, " U " the type end and the dropout iron core (410) of described grip tab (390) are connected, another relative with " U " type end be distolateral to be provided with slightly larger in diameter and to constitute bayonet socket (395) and penetrate in the described notch in the circular hole of release link (460), and can be under the traction of dropout iron core (410) slide before and after in notch, before and after the displacement of sliding should be able to make bayonet socket (395) be release link (460) end part aligning and stagger between conversion, described bayonet socket (395) forms buckle structure with the snap close draw-in groove; Described contact-making switch is pressed state down in reset key (130) and is connected the electric leakage signal simulation branch road that test resistance constitutes, and returning to form disconnects electric leakage signal simulation branch road.

2, the socket type earth-fault line-breaker with reverse wiring protection function according to claim 1; it is characterized in that: described reset cradle (280) lower end fixedly is embedded metallic support sheet (380); be fixed with the reverse iron core of column (370) vertically downward on the support chip (380); the guide hole that is provided with diameter and reverse iron core (370) through hole formation movingly of correspondence position under reverse iron core (370), outer sheathed counteracting spring (360) follower head of described reverse iron core (370) inserts the reverse resilient support of formation mechanism in the described guide hole.

3, the socket type earth-fault circuit device with reverse wiring protection function according to claim 1 and 2; it is characterized in that: the copper contact chip (310) that lug (255) that described contact-making switch is protruded by side direction on arbitrary movable contact spring and correspondence are arranged under the lug (255) is formed; described copper contact chip (310) and test resistance are electrically connected, and series arm two tip nodes that test resistance, contact-making switch are formed are connected across respectively between two power lines of power input LINE side of dynamic and static contact.

4, the socket type earth-fault line-breaker with reverse wiring protection function according to claim 1 and 2 is characterized in that: described dropout iron core (410) outboard end does not have boss, and the boss root is provided with annular recess; Described grip tab (390) " U " shape end is provided with the breach that matches with described annular recess, and described breach is stuck in and constitutes interlock on the annular recess.

5, the socket type earth-fault line-breaker of the capable reverse wiring protection function of tool according to claim 3 is characterized in that: described dropout iron core (410) outboard end does not have boss, and the boss root is provided with annular recess; Described grip tab (390) " U " shape end is provided with the breach that matches with described ring-type river groove, and described breach is stuck in and constitutes interlock on the annular recess.

6, the socket type earth-fault line-breaker with reverse wiring guarantor expansion function according to claim 4, it is characterized in that: the breach that described grip tab (390) " U " shape end is provided with is " U " shape.

7, the socket type earth-fault line-breaker with reverse wiring guarantor expansion function according to claim 5, it is characterized in that: the breach that described grip tab (390) " U " shape end is provided with is " U " shape.