CN201266741Y

CN201266741Y - Oscillating arm type tripolar switching apparatus for leakage protecting plug

Info

Publication number: CN201266741Y
Application number: CNU2008201615785U
Authority: CN
Inventors: 章祖德
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-08
Filing date: 2008-10-08
Publication date: 2009-07-01
Anticipated expiration: 2018-10-08

Abstract

An oscillating arm type three-pole on-off device of a leakage protective plug belongs to the technical field of protectors of low-voltage apparatuses. The on-off device comprises a base, a contact mechanism composed of a ground wire contact pair, a live wire contact pair and a neutral wire contact pair, a circuit board, an electromagnetic trip driving mechanism, a tripping mechanism and a reset button, and is characterized by also comprising a rocker configured on the base. The rocker is connected with the tripping mechanism, one side at one end of the rocker corresponds to and is matched with the live wire contact pair and the other side corresponds to and is matched with the neutral wire contact pair, while the middle part at the other end thereof corresponds to and is matched with the ground wire contact pair. The device has the advantages of being capable of realizing the linked closing and cutting off of the ground wire, live wire and neutral wire contacts, with the ground wire contact being closed prior to the live wire and neutral wire contacts in switching on and the live wire and neutral wire contacts being cut off prior to the ground wire contact in breaking, thus being beneficial to fully protecting electric appliances and personnel safety.

Description

The oscillating arm type tripolar on-off apparatus of leakage protecting plug

Technical field

The utility model belongs to the protective device technical field of low-voltage electrical apparatus, is specifically related to a kind of oscillating arm type tripolar on-off apparatus of leakage protecting plug.

Background technology

In family, school, office space and even its public place, the use of various electrical equipment is increasing, shows that on the one hand people's material life improves, and office conditions is improved, and is implied with many safe hidden danger of losing but then.Here the potential safety hazard of being said mainly contains the following aspects: the one, and the inferior electric appliance casing that causes of line quality is charged; The 2nd, user's laying-out is lost standard; The 3rd, appliance socket wiring error; The 4th, the electrical network instability.In the above-mentioned hidden danger, electrical appliance shell and ground wire electrification are the most outstanding, the electric shock accidents that causes and/or to burn the situation of electrical equipment more.Leakage protecting plug can be avoided aforesaid accident to a certain extent and play the safety guarantee effect; but; the on-off system of the leakage protecting plug in the prior art only plays therefore the two poles of the earth live wire of feeder ear and neutral line disjunction can not be not enough to stop the hidden danger of getting an electric shock with because of unusual and charged ground wire disjunction.

China utility model patent Granted publication CN2528101Y discloses a kind of tripping mechanism of residual current circuit breaker; this mechanism is in fact the on-off system of leakage protecting plug; by pedestal; be located at the contact mechanism (two utmost points) on the support; be fixed on the circuit board on the pedestal; be installed with in the cavity volume of pedestal and dropout driving mechanism that be electrically connected with circuit board; snap close with the connection of dropout driving mechanism; carry the push rod (also claiming reset button) of back-moving spring and be hinged on the pedestal and an end be inserted in the swing arm chamber on the push rod and the swing arm that the other end matches with snap close constitutes, its operation principle can be understood in detail from Instructions Page 2 the 16th～31 row of this patent.This patented technology scheme role makes the two poles of the earth live wire disjunction of feeder ear, does not have ability or title function to the ground wire disjunction.

Perhaps be that people have only recognized fully the two poles of the earth live wire and neutral line disjunction still are not enough to embody fail safe, could play guaranteeing role to safety to the ground wire disjunction simultaneously and have only, therefore, existing market is seen in the tripolar on-off apparatus that is provided on the leakage protecting plug, yet, because this tripolar on-off apparatus is to have adopted an additional contact spring to realize separately to the closure of ground wire contact, therefore in making process, the reliability of ground wire closing of contact contact is unsatisfactory, there is the unfavorable factor that influences the electrical equipment reliable ground, because the closed action of ground wire contact does not produce interlock with the closed action of firewire contact and neutral line contact, and then can't be embodied in the making process ground wire contact prior to the firewire contact and the neutral line closing of contact; On the contrary, in breaking course, firewire contact and neutral line contact are disconnected prior to the ground wire contact.

Summary of the invention

Task of the present utility model be to provide a kind of can make ground wire contact, firewire contact and neutral line contact realize interlock closed with disconnect and firewire contact and neutral line contact are disconnected when the ground wire contact is prior to firewire contact and the neutral line closing of contact with in disjunction when closing a floodgate prior to the ground wire contact and use the oscillating arm type tripolar on-off apparatus of safing leakage protecting plug.

Task of the present utility model is finished like this; a kind of oscillating arm type tripolar on-off apparatus of leakage protecting plug; it comprises pedestal; be located at right on the pedestal by the ground wire contact; the live wire contact to the contact mechanism of neutral line contact to constituting; be fixed on the circuit board on the pedestal; be contained in the pedestal and electromagnetic trip driving mechanism that be electrically connected with described circuit board; be located on the pedestal and tripping mechanism that connect with described electromagnetic trip driving mechanism and lower end are insinuated in the pedestal and described tripping mechanism cooperate and the reset button that carry back-moving spring of pegging graft; be characterised in that: also include a rocker that is configured on the described pedestal; this rocker connects mutually with described tripping mechanism; and; one side of rocker one end and described live wire contact are to corresponding and match; opposite side and described neutral line contact be to corresponding and match, and the middle part of the rocker other end and described ground wire contact are to corresponding and match.

In a specific embodiment of the present utility model, the ground wire contact of described contact mechanism is to comprising first movable palping foot and first static palping foot, first movable palping foot is plugged in the bottom of described pedestal, one termination continues a ground wire RVV, and the other end is shelved on and constitutes one first moving contact on the rocker that described and tripping mechanism connect and in the side towards described first static palping foot, described first static palping foot is fixed on the first haptic element holder of described pedestal, one termination continues the ground connection RVV, the other end constitutes one first fixed contact, and this first fixed contact is corresponding with described first moving contact; The live wire contact of described contact mechanism is to comprising second movable palping foot and second static palping foot, second movable palping foot is embedded on the second movable palping foot embedding slot of described pedestal one side and an inclined to one side end, one end of this second movable palping foot leans out the outer and live wire RVV that continued of pedestal, and the other end is shelved on and constitutes one second moving contact on the rocker that described and tripping mechanism connect and in the side towards described second static palping foot, described second static palping foot is fixed on the second static palping foot holder of a side sidepiece of described pedestal, one termination of this second static palping foot is continuous to have first to import RVV, the other end constitutes one second fixed contact, and this second fixed contact is corresponding mutually with described second moving contact; The neutral line contact of described contact mechanism is to comprising the 3rd movable palping foot and the 3rd static palping foot, the 3rd movable palping foot is embedded on the 3rd movable palping foot embedding slot of a described pedestal opposite side and an inclined to one side end, one end of the 3rd movable palping foot leans out the outer and neutral line RVV that continued of pedestal, and the other end is shelved on and constitutes one the 3rd moving contact on the rocker that described and tripping mechanism connect and in the side towards described the 3rd static palping foot, described the 3rd static palping foot is fixed on the 3rd static palping foot holder of opposite side sidepiece of described pedestal, one termination of the 3rd static palping foot is continuous to have second to import RVV, the other end constitutes one the 3rd fixed contact, and the 3rd fixed contact and described the 3rd moving contact correspond to each other.

In another specific embodiment of the present utility model, one side of one end of described rocker constitutes one first and shelves bead, opposite side constitutes one second and shelves bead, respectively be concaved with each other an identical and corresponding groove in position of shape on the wall body that faces each other at the middle part of rocker, and the position placed in the middle of the other end of rocker is extended with one the 3rd with contracting state and shelves bead with narrow, the end that described second movable palping foot has second moving contact is shelved on described first and shelves on the bead, the end that described the 3rd movable palping foot has the 3rd moving contact is shelved on described second and shelves on the bead, the end that described first movable palping foot has first moving contact is shelved on the described the 3rd and shelves on the bead, and described tripping mechanism constitutes connection at the position and the rocker of described a pair of groove.

Go back in the specific embodiment of the present utility model, described first, second, third fixed contact is copper contact or copper electroplate contact.

In another specific embodiment of the present utility model, described first, second, third moving contact is copper contact or copper electroplate contact.

In another specific embodiment of the present utility model, described groove be shaped as arch.

More of the present utility model and in specific embodiment, described tripping mechanism comprises lifting arm and snap close, the positive middle part of the short transverse of lifting arm offers the reset button hole, described reset button is plugged in the reset button hole, the sidepiece of lifting arm offers lock buckling groove, and respectively constituting one, the bottom of the corresponding both sides of lifting arm is used for the pivot that connects mutually with described swing arm, one end of described snap close upwards is bent into the snap close pin of a U-shaped, electromagnetic trip driving mechanism in this snap close pin and the described electromagnetic trip driving mechanism containing cavity that is contained on the pedestal connects, and the other end of snap close constitutes the button pin of a level, and the button pin is inserted in the described lock buckling groove.

In of the present utility model and then specific embodiment, described electromagnetic trip driving mechanism comprises solenoid, armature and armature spring, armature spring and armature are located in the solenoid successively, and, the snap close pin that the front end of armature leans out solenoid and described snap close connects, solenoid with horizontally-arranged state be contained in the electromagnetic trip driving mechanism containing cavity of pedestal.

Of the present utility model again more and in specific embodiment, the front end of described armature is concaved with a snap close pin groove, described snap close pin and the groove joint of snap close pin.

In again of the present utility model and then specific embodiment, be equipped with on the described circuit board and be used to detect the residual current of the live wire and the neutral line and a pair of zero sequence current mutual inductor that detects the unusual leakage current of ground wire.

Technical scheme disclosed in the utility model is owing to set up the rocker that connects mutually with tripping mechanism; and the ground wire, live wire, neutral line contact that make rocker and contact mechanism are to matching; therefore; can realize ground wire, live wire, the closed and disconnection of neutral line contact interlock; and; the ground wire contact can be prior to the firewire contact and the neutral line closing of contact when closing a floodgate; then firewire contact and neutral line contact disconnect prior to the ground wire contact when disjunction, thereby help fully playing protection electrical appliance and personal safety.

Description of drawings

Fig. 1 is a specific embodiment structure chart of the present utility model.

Fig. 2 is the structure chart after Fig. 1 assembling.

Fig. 3 and Fig. 4 are the course of action schematic diagram of the swing arm of the present utility model in making process.

Fig. 5 and Fig. 6 finish schematic diagram after the closure for contact mechanism of the present utility model in making process.

Fig. 7 and Fig. 8 finish the schematic diagram that branch is had no progeny for the contact mechanism of the present utility model in breaking course.

Fig. 9 is an application examples schematic diagram of the present utility model.

Embodiment

For your auditor of making Patent Office particularly the public be well understood to the technical spirit and the beneficial effect of the technical solution of the utility model, the spy is described in more detail embodiment of the present utility model in conjunction with the accompanying drawings.But; all of applicant all are not construed as limiting the technical solution of the utility model to the explanation of embodiment; any rely on that the utility model design done only be form but not the variation of essence all should be considered as technical scheme category disclosed in the utility model, and be considered as falling into the protection range that the utility model is advocated in the claims.

Embodiment:

Please be referring to Fig. 1 and Fig. 2, provided a concrete shape definitely be not subjected to illustrating restriction as required and transformable and material is preferably the pedestal 1 of plastics, constitute at the middle part of the length direction of this pedestal 1 bottom lock and the electromagnetic trip driving mechanism containing cavity 14 that relies on circuit board 3 to be implemented of open topped to uncovered sealing, this electromagnetic trip driving mechanism containing cavity 14 in horizontally-arranged promptly with level the solenoid 41 of the electromagnetic trip driving mechanism 4 that also will describe in detail below holding.Being example at present by location status illustrated in figures 1 and 2, left end at pedestal 1 constitutes one first haptic element holder 11, and offer one second movable palping foot embedding slot 12a in a side of the right-hand member of pedestal 1, and the opposite side at the right-hand member of pedestal 1 offers one the 3rd movable palping foot embedding slot 12b, and second, third movable palping

foot embedding slot

12a, 12b keep corresponding relation each other.And, position placed in the middle in a side of the length direction of pedestal 1 constitutes one second static palping foot holder 13a, and constituting one the 3rd static palping foot holder 13b at the position placed in the middle of the opposite side of the length direction of pedestal 1, second, third static palping foot holder 13a, the 13b position on pedestal 1 keeps symmetry.

Continuation is referring to Fig. 1 and Fig. 2, and applicant's emphasis is described contact mechanism 2 of the present utility model, contact mechanism 2 comprise the ground wire contact to 21, the live wire contact to 22 and neutral line contact to 23.The ground wire contact is moving by first to 21, static palping foot 211,212 constitute, first movable palping foot 211 is plugged on the bottom of pedestal 1, one end is that illustrated right-hand member is fixed and omited to lean out pedestal 1 with screw and pedestal 1, be connected with ground wire RVV 2112 in this end end that is stuck in pedestal 1, and the other end of first movable palping foot 211 constitutes free end and be shelved on below on the rocker 7 that also will describe in detail, constitute first moving contact 2111 at this free end and towards a side of first static palping foot 212, first moving contact 2111 can be a copper contact, it also can be copper electroplate contact, present embodiment is selected the latter, promptly selects copper electroplate contact for use.First static palping foot 212 is to insert the embedding build-in or to be fixed on the aforesaid first static palping foot holder 11 with screw or rivet or with other similar fixed form, constitute one first fixed contact 2121 at 212 ends of this first static palping foot corresponding to aforesaid first movable palping foot 211, this first fixed contact 2121 and first moving contact 2111 keep corresponding relation up and down, ground connection RVV 2122 has continued for first moving contact, 2111 employing copper electroplate contacts, the other end of first static palping foot 212.

The live wire contact is made of the second dynamic and static haptic element 221,222 22, second movable palping foot 221 is bent into stepped by Fig. 1 signal by copper sheet, be embedded on the second movable palping foot embedding slot 12a of a side of the length direction of having explained the front that is opened in pedestal 1 and an inclined to one side end, one end is that illustrated right-hand member is connected with live wire RVV 2212, and the other end is that illustrated left end is stretched over the position of the second static palping foot holder 13a and constitutes one second moving contact 2211.Second static palping foot 222 is fixed on the second static palping foot holder 13a with screw or rivet or slotting embedding or with other similar fixed form equally, one end of second static palping foot 222 promptly constitutes one second fixed contact 2221 by right-hand member shown in Figure 1 and in the side towards aforesaid second movable palping foot 221, this second fixed contact 2221 keeps corresponding relation up and down with aforesaid second moving contact 2211, and the other end of second static palping foot 222 promptly is connected with the first input RVV 2222 by the left end of location status shown in Figure 1.For the second dynamic and static contact 2211,2221, both can be copper contact, also can be the contact of copper electroplate, present embodiment is selected a kind of situation in back.

Neutral line contact is made of the 3rd dynamic and static haptic element 231,232 23, the 3rd movable palping foot 231 by copper sheet be bent into by shown in Figure 1 and with the corresponding to shape of the shape of aforesaid second movable palping foot 221, be embedded into the opposite side of the length direction that is opened in pedestal 1 that the applicant explained and the 3rd movable palping foot embedding slot 12b of an inclined to one side end in the above, one end is that illustrated right-hand member is connected with neutral line RVV 2312, and the other end is that left end illustrated in figures 1 and 2 is stretched over the position of the 3rd static palping foot holder 13b and constitutes one the 3rd moving contact 2311.The 3rd static palping foot 2321 is equally with screw or rivet or to insert the embedding mode or to be fixed on the 3rd static palping foot holder 13b with other similar equivalent way, one end of the 3rd static palping foot 232 is illustrated right-hand member and constitutes one the 3rd fixed contact 2321 in the side towards aforesaid the 3rd movable palping foot 231, the 3rd fixed contact 2321 keeps corresponding relation up and down with aforesaid the 3rd moving contact 2311, and the other end of the 3rd fixed contact 232 is that illustrated left end is connected with the second input RVV 2322.For the 3rd dynamic and

static contact

2311,2321, both can be to adopt copper contact, the contact that also can adopt the copper electroplate, present embodiment is selected the latter.

Please emphasis see Fig. 1 and still in conjunction with Fig. 2, provided rocker 7 as the technical essential that embodies the technical solution of the utility model, the middle section of this rocker 7 is through-hole forms, the preferred plastic moulding that adopts is shaped, extend in a side of an end of this rocker 7 and to constitute one first and shelve bead 72a, the opposite side extension of one end constitutes one second and shelves bead 72b, and first, second is shelved bead 72a, the 72b position on rocker 7 and keeps symmetric relation each other.On the inwall of a pair of wall body at the middle part of rocker 7, respectively be concaved with one and be shaped as groove 71 arch or that claim to be n shape with face-to-face position relation.Constitute one the 3rd with contracting form shelve bead 73 with narrow at the position placed in the middle of the other end of rocker 7.End with second moving contact 2211 of aforementioned second movable palping foot 221 is shelved on first and shelves on the bead 72a; End with the 3rd moving contact 2311 of aforementioned the 3rd movable palping foot 231 is shelved on second and shelves on the bead 72b; End with first moving contact 2111 of above-mentioned first movable palping foot 211 is shelved on the 3rd and shelves on the bead 73.Hence one can see that, when rocker 7 is about under the drive of tripping mechanism 5 of narration when up below, just drive first, second, third moving

contact

2111,2211,2311 by rocker 7 and draw close towards first, second, third fixed contact, 2121,2221,2321 directions, vice versa.

In Fig. 1, provided tripping mechanism 5 preferred but not that be limited to, it is made of lifting arm 51 and snap close 52, whole lifting arm 51 is contained in the lifting arm chamber 15 of an end (left end shown in Figure 1) of pedestal 1, central part in the short transverse of this lifting arm 51 offers reset button hole 511, pegs graft to cooperate the lower end of reset button 6 in this reset button hole 511.Preferred scheme is: reset button hole 511 is designed to rectangular opening, more particularly be designed to square hole, simultaneously reset button 6 is designed to shape of cross section and is square, cooperate so that realize ideal with reset button hole 511, on reset button 6, be arranged with back-moving spring 61, and offer a lock buckling groove 62 in the portion on the lower side of reset button 6 and at position corresponding to snap close 52.Offer one at the middle part of the short transverse of lifting arm 51 and be through to the lock buckling groove 512 of opposite side from a side, and in the bottom of the corresponding both sides of lifting arm 51 each extends and constitutes a pivot 513, this matches with groove 71 on the aforesaid rocker 7 to pivot 513, when pushing reset button 6 downwards when making lifting arm 51 motions, then drive rocker 7 motions by lifting arm 51, when back-moving spring 61 resets, drive lifting arm 51 motions with example, then drive rocker 7 motions by lifting arm 51.Therefore, if claim that lifting arm 51 is a driving link, rocker 7 is servo-actuated (passive) part so.Snap close 52 as tripping mechanism 5, one end upwards bending constitutes a snap close pin 521 that is tending towards U-shaped substantially, this snap close pin 521 connects with the following electromagnetic trip driving mechanism 4 that is about to narration, the other end of snap close 52 constitutes a button pin 522 with the bending of level ground, the shape of button pin 522 is the U-shaped of 90 ° of deflections, the U-shaped that promptly is 90 ° of deflections left so that for reset button 6 provides the space, that is to say for reset button 6 to cooperate with button pin 522 corresponding to button pin 522 or title.By the state after the assembling of Fig. 1 signal and Fig. 2 as can be known, button pin 522 is inserted in the lock buckling groove 512 and with the aforesaid lock buckling groove 62 that is opened on the reset button 6 and matches.

The structure of electromagnetic trip driving mechanism 4 is that the electromagnetic trip mechanism that CN2528101Y introduced that for example mentions in the superincumbent background technology of the applicant hurdle with known technology is identical.This electromagnetic trip driving mechanism 4 comprises solenoid 41, armature 42 and armature spring 43, armature spring 43 and armature 42 are contained in the medium pore of solenoid 41, though in Fig. 1 and Fig. 2, fail to reflect, but can pass through Fig. 3, the signal of Fig. 5 and Fig. 7 obtains understanding, the front end of armature 42 leans out solenoid 41 and offers a snap close pin groove 421 (Fig. 3 shows), aforesaid snap close pin 521 constitutes on this snap close pin groove 421 and armature 42 connections, more particularly constitute with electromagnetic trip driving mechanism 4 and connect, and then specifically, tripping mechanism 5 and electromagnetic trip driving mechanism 4 are connect.

Please consult Fig. 3 to Fig. 6, the applicant sets forth the making process of operation principle of the present utility model in conjunction with Fig. 3 to Fig. 6.When pressing reset button 6 downwards by the user, back-moving spring 61 compressions, reset button 6 is descending, the button pin 522 of the snap close 52 in the lock buckling groove 512 that is inserted in lifting arm 51 is entered be opened in reset button 6 on the lower side in the lock buckling groove 62 of portion under the promotion of armature 42 and armature spring 43.After decontroling reset button 6, reset button 6 drives lifting arm 51 by snap close 52 under the restoring force effect of back-moving spring 61 and rocker 7 begins to move upward, because second movable palping foot 221 and the 3rd movable palping foot 231 act on a pair of first of rocker 7, second shelves bead 72a, moment on the 72b or title power act on the 3rd of rocker 7 much larger than first movable palping foot 211 and shelve moment or title power on the bead 73, therefore rocker 7 being shown as around the pivot 513 of lifting arm 51 in uphill process swings, up to as first moving contact 2111 on first movable palping foot 211 of ground wire movable palping foot and as first fixed contact, 2121 closures on first static palping foot 212 of ground wire static palping foot, specifically illustrate by Fig. 3 and Fig. 4.Under aforesaid state, rocker 7 continues to rise, rocker 7 can only be done backswing around the pivot 513 of the lifting arm 51 of tripping mechanism 5, up to the live wire contact to second moving contact 2211 on 22 second movable palping foot 221 and live wire contact to second fixed contact, 2221 closures on 22 second static palping foot 222.Meanwhile, to the 3rd fixed contact 2321 closures on 23 the 3rd static palping foot 232, finish, specifically can be by Fig. 4 and Fig. 5 signal by making process to the 3rd moving contact 2311 on 23 the 3rd movable palping foot 231 and neutral line contact for neutral line contact.As seen in making process, the ground wire contact is to 21 closures that take the lead in, thereafter just by the live wire contact to 22 and neutral line contact closed simultaneously to 23, fail safe is had good guaranteeing role.

Please consult Fig. 7 and Fig. 8, the applicant sets forth breaking course, the applicant mentions in the above, the solenoid 41 of electromagnetic trip driving mechanism 4 be be fixed on pedestal 1 on circuit board 3 be electrically connected, therefore when a pair of zero sequence current mutual inductor 31 on the circuit board 3 detect live wire RVV 2212 (being live wire) and neutral line RVV 2312 (being the neutral line) residual current and during unusual leakage current on the RVV 2112 (being ground wire), make solenoid 41 energisings of electromagnetic trip driving mechanism 4 by the electronic circuit on the circuit board 3, the electromagnetic force that is produced by solenoid 41 drives armature 42, be that armature 42 is in motion in solenoid 41 under the state that overcomes armature spring 43, because the snap close climbers 421 of armature 42 front ends are to connect mutually with the snap close 52 of tripping mechanism 5, therefore drive snap close 52 by armature 42, snap close lock 62 on previous and the reset button 6 is hung mutually or is claimed the button pin 522 of the snap close 52 of fastening to recess lock buckling groove 62, reset button 6 upwards resets under the restoring force effect of back-moving spring 61 at this moment.Meanwhile, by the live wire contact 22 second movable palping foot 221, neutral line contact are acted on the lifting arm 51 that makes making a concerted effort on the rocker 7 rocker 7 drive tripping mechanisms 5 to 23 the 3rd movable palping foot 231 and ground wire contact downwards to 21 first movable palping foot 211 and reset downwards, thereby rapidly the live wire contact is all disconnected 21 the first dynamic and

static contact

2111,2121 23 the 3rd dynamic and

static contact

2311,2321 and ground wire contact 22 the second dynamic and static contact 2211,2221 and neutral line contact.In this breaking course, equally by second, the 3rd movable palping foot 221,231 act on rocker 7 an end a pair of first, second shelves bead 72a, moment on the 72b or be called firmly is far longer than the other end the 3rd that first movable palping foot 211 acts on rocker 7 and shelves the moment on the bead 73 or be called firmly, make to produce swing in the process that rocker 7 resets downwards, take the lead in first moving contact 2111 on the ground wire contact and the disconnection of first fixed contact 2121 on first static palping foot 212 of second moving contact 2211 on 22 second movable palping foot 221 and the disconnection action each other of second fixed contact 2221 on second static palping foot 222 moved thereby make as the live wire contact; Simultaneously and in like manner, the action that neutral line contact disconnects each other to the 3rd moving contact 2311 on 23 the 3rd movable palping foot 231 and the 3rd fixed contact 2321 on the 3rd static palping foot 232 takes the lead in the ground wire contact disconnection of first moving contact 2111 on 21 first movable palping foot 211 and first fixed contact 2121 on first static palping foot 212 being moved.In brief, the live wire contact to 22 and neutral line contact to 23 actions that disconnect simultaneously prior to the ground wire contact to 21 disconnection action, thereby safety is had reliable guaranteeing role, specifically by Fig. 7 and Fig. 8 signal.

Application examples:

Please consult Fig. 9, be applied to an example of leakage protecting plug as oscillating arm type tripolar on-off apparatus.Two zero sequence current mutual inductors 31 are installed on circuit board 3, detect the front by this zero sequence current mutual inductor 31 and described live wire and the residual current of the neutral line and the unusual leakage current on the ground wire that does not repeat them here, by aforesaid ground wire RVV 2112, live wire RVV 2212 is used to be connected electrical appliance for example household electrical appliance or office electrical equipment etc. with the three-core cable 8 that neutral line RVV 2312 is constituted, and aforesaid earth connection RVV 2122, the first input RVV 2222 and the second input RVV 2322 are electrically connected with the prong mechanisms 9 of leakage protecting plug, and specifically: ground connection RVV 2122 is connected with ground wire utmost point pin 91; The first input RVV 2222 is connected with live wire utmost point pin 92; The second input RVV 2322 is connected with neutral pole pin 93.Though the applicant does not explain in a pair of zero sequence current mutual inductor 31 to pass which kind of RVV respectively in the above, but according to general knowledge especially according to shown in this figure, one of them zero sequence current mutual inductor 31 in a pair of zero sequence current mutual inductor 31 penetrates ground connection RVV 2122, and another zero sequence current mutual inductor 31 then penetrates first,

second input RVV

2222,2322 jointly.Again; according to general knowledge; have illustrated drain pan 10a and loam cake 10b undoubtedly as leakage protecting plug, above-described all parts are covered by drain pan 10a and loam cake 10b and protect, and only stretch out in the pin holes of the correspondence on the drain pan 10a end of ground wire utmost point pin 91, live wire utmost point pin 92 and neutral pole pin 93.In addition, the other also mark of the pin holes of applicant on drain pan 10a has the symbol of N and L and a signal ground connection, and wherein: L represents live wire utmost point pin holes, and N represents the neutral pole pin holes, the symbolic representation ground wire utmost point pin holes of signal ground connection.Aforesaid ground wire utmost point pin 91, live wire utmost point pin 92 and neutral pole pin 93 are used to insert socket, and using provides the input power supply.When electric leakage taking place and/or taking place that the person gets an electric shock and during the unusual charged situation of ground wire with household electrical appliance or office electrical equipment or shop equipment or the like, then will be connected to aforementioned electrical equipment or device power supply (DPS) three and disconnect extremely rapidly and all, thereby can prevent the damage of the generation of electric shock accidents and/or electrical equipment, equipment reliably by the utility model device.Concrete disconnection process can be fully recognized the truth the detailed description of breaking course in the above by the applicant.

Claims

1; a kind of oscillating arm type tripolar on-off apparatus of leakage protecting plug; it comprises pedestal (1); be located on the pedestal (1) by the ground wire contact to (21); the contact mechanism (2) that the live wire contact constitutes (23) (22) and neutral line contact; be fixed on the circuit board (3) on the pedestal (1); be contained in the pedestal (1) and electromagnetic trip driving mechanism (4) that be electrically connected with described circuit board (3); be located on the pedestal (1) and tripping mechanism (5) that connect with described electromagnetic trip driving mechanism (4) and lower end are insinuated in the pedestal (1) and cooperate and the reset button (6) that carry back-moving spring (61) of described tripping mechanism (5) grafting; it is characterized in that: also include a rocker (7) that is configured on the described pedestal (1); this rocker (7) connects mutually with described tripping mechanism (5); and; one side of rocker (7) one ends and described live wire contact are corresponding and match to (22); opposite side and described neutral line contact are corresponding and match to (23), and the middle part of rocker (7) other end and described ground wire contact are corresponding and match to (21).

2, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 1, the ground wire contact that it is characterized in that described contact mechanism (2) comprises first movable palping foot (211) and first static palping foot (212) to (21), first movable palping foot (211) is plugged in the bottom of described pedestal (1), one termination continues a ground wire RVV (2112), the described rocker (7) that connects with tripping mechanism (5) is gone up and constitute one first moving contact (2111) in the side towards described first static palping foot (212) and the other end is shelved on, described first static palping foot (212) is fixed on the first haptic element holder (11) of described pedestal (1), one termination continues ground connection RVV (2122), the other end constitutes one first fixed contact (2121), and this first fixed contact (2121) is corresponding with described first moving contact (2111); The live wire contact of described contact mechanism (2) comprises second movable palping foot (221) and second static palping foot (222) to (22), second movable palping foot (221) is embedded on the second movable palping foot embedding slot (12a) of described pedestal (1) one side and an inclined to one side end, one end of this second movable palping foot (221) leans out the outer and live wire RVV (2212) that continued of pedestal (1), the described rocker (7) that connects with tripping mechanism (5) is gone up and constitute one second moving contact (2211) in the side towards described second static palping foot (222) and the other end is shelved on, described second static palping foot (222) is fixed on the second static palping foot holder (13a) of a side sidepiece of described pedestal (1), one termination of this second static palping foot (222) is continuous to have first to import RVV (2222), the other end constitutes one second fixed contact (2221), and this second fixed contact (2221) is corresponding mutually with described second moving contact (2211); The neutral line contact of described contact mechanism (2) comprises the 3rd movable palping foot (231) and the 3rd static palping foot (232) to (23), the 3rd movable palping foot (231) is embedded on the 3rd movable palping foot embedding slot (12b) of described pedestal (a 1) opposite side and an inclined to one side end, one end of the 3rd movable palping foot (231) leans out the outer and neutral line RVV (2312) that continued of pedestal (1), the described rocker (7) that connects with tripping mechanism (5) is gone up and constitute one the 3rd moving contact (2311) in the side towards described the 3rd static palping foot (232) and the other end is shelved on, described the 3rd static palping foot (232) is fixed on the 3rd static palping foot holder (13b) of opposite side sidepiece of described pedestal (1), one termination of the 3rd static palping foot (232) is continuous to have second to import RVV (2322), the other end constitutes one the 3rd fixed contact (2321), and the 3rd fixed contact (2321) corresponds to each other with described the 3rd moving contact (2311).

3; the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 2; a side that it is characterized in that an end of described rocker (7) constitutes one first and shelves bead (72a); opposite side constitutes one second and shelves bead (72b); respectively be concaved with each other an identical and corresponding groove in position (71) of shape on the wall body that faces each other at the middle part of rocker (7); and the position placed in the middle of the other end of rocker (7) is extended with one the 3rd with contracting state and shelves bead (73) with narrow; the end that described second movable palping foot (221) has second moving contact (2211) is shelved on described first and shelves on the bead (72a); the end that described the 3rd movable palping foot (231) has the 3rd moving contact (2311) is shelved on described second and shelves on the bead (72b); the end that described first movable palping foot (211) has first moving contact (2111) is shelved on the described the 3rd and shelves on the bead (73), and described tripping mechanism (5) constitutes at the position of described a pair of groove (71) and rocker (7) and connects.

4, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 2 is characterized in that described first, second, third fixed contact (2121,2221,2321) is copper contact or copper electroplate contact.

5, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 2 is characterized in that described first, second, third moving contact (2111,2211,2311) is copper contact or copper electroplate contact.

6, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 3 is characterized in that the arch that is shaped as of described groove (71).

7; the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 1; it is characterized in that described tripping mechanism (5) comprises lifting arm (51) and snap close (52); the positive middle part of the short transverse of lifting arm (51) offers reset button hole (511); described reset button (6) is plugged in the reset button hole (511); the sidepiece of lifting arm (51) offers lock buckling groove (512); and respectively constituting one, the bottom of the corresponding both sides of lifting arm is used for the pivot that connects mutually with described swing arm (7); one end of described snap close (52) upwards is bent into the snap close pin (521) of a U-shaped; this snap close pin (521) and described interior electromagnetic trip driving mechanism (4) connection of electromagnetic trip driving mechanism containing cavity (14) that is contained on the pedestal (1); and the other end of snap close (52) constitutes the button pin (522) of a level, and button pin (522) is inserted in the described lock buckling groove (512).

8, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 7; it is characterized in that described electromagnetic trip driving mechanism (4) comprises solenoid (41), armature (42) and armature spring (43); armature spring (43) and armature (42) are located in the solenoid (41) successively; and; the snap close pin (521) that the front end of armature (42) leans out solenoid (41) and described snap close (52) connects, solenoid (41) with horizontally-arranged state be contained in the electromagnetic trip driving mechanism containing cavity (14) of pedestal (1).

9, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 8 is characterized in that the front end of described armature (42) is concaved with a snap close pin groove (421), and described snap close pin (521) connects with snap close pin groove (421).

10, the oscillating arm type tripolar on-off apparatus of leakage protecting plug according to claim 1 is characterized in that being equipped with on the described circuit board (3) residual current that is used to detect the live wire and the neutral line and a pair of zero sequence current mutual inductor (31) that detects the unusual leakage current of ground wire.