CN214797293U - Residual current circuit breaker - Google Patents

Abstract

The utility model provides an electric leakage circuit breaker, including operating device, L utmost point contact structure, electric leakage trip gear and N utmost point contact structure, operating device is when the switching-on of drive L utmost point contact structure, and through transfer line and biasing member's cooperation drive N utmost point moving contact and the joining of N utmost point static contact of N utmost point contact structure, and when electric leakage circuit breaker appears the electric leakage separating brake, the drive structure on the electric leakage trip gear can push away the electric leakage trip plate drive operating device of operating device and break off the brake and rotate, the benefit of design like this lies in, electric leakage trip gear directly forms the transmission fit with operating device, need not to set up the transfer drive unit again, the structure is more compact, reduce the assembly degree of difficulty, assembly speed when having improved the product production, improve the switching-on speed of N utmost point moving contact through the biasing member exerted simultaneously, make N utmost point contact structure be prior to the switching-on of L utmost point contact structure, therefore, the problem of equipment burnout caused by the joint of the L-pole contact structure which is closed first is avoided, and the safety of the product in use is improved.

Description

Residual current circuit breaker

Technical Field

The utility model relates to a residual current circuit breaker technical field, concretely relates to residual current circuit breaker.

Background

The leakage breaker, called leakage protector for short, is mainly used for protecting the human body from electric shock when the equipment has leakage fault and fatal danger, has the functions of overload and short-circuit protection, can be used for protecting the overload and short circuit of a circuit or a motor, and can also be used for the infrequent switching starting of the circuit under normal conditions.

Chinese patent document CN107146745B discloses an electronic leakage circuit breaker, which comprises a housing, a partition board arranged in the housing divides the housing into two layers of cavities, the two layers of cavities are a first cavity for laying an L-pole breaker module and a second cavity for laying an N-pole breaker module and a leakage protection module of the electronic leakage circuit breaker; the L pole circuit breaking module comprises an operating handle, an operating mechanism and an L pole contact device, and the electric leakage protection module comprises a zero sequence mutual inductor, an electronic component board, an electric leakage tripping device and an electric leakage action mechanism; the N pole circuit breaking module comprises an N pole contact device, the N pole contact device comprises an N pole moving contact and an N pole static contact, the N pole moving contact penetrates through the partition plate through the installation shaft to be linked with an operating mechanism of the L pole circuit breaking module in the first cavity, and the electric leakage operating mechanism is located between the electric leakage tripping device and the N pole circuit breaking module and is linked with the operating mechanism of the L pole circuit breaking module.

However, the electronic residual current circuit breaker has the following problems in practical use:

1. when the circuit breaker takes place the electric leakage dropout, electric leakage trip gear makes the disconnection of L utmost point contact device through electric leakage actuating mechanism drive operating device, just operating device still can drive the disconnection of N utmost point contact device through the installation axle, and the electric leakage driving chain is longer, participates in driven part many to it is more troublesome to send the production equipment, wastes time and energy, and this kind of electric leakage transmission structure can only guarantee that L utmost point contact structure is prior to N utmost point contact device separating brake, can't guarantee that L utmost point contact structure is later than N utmost point contact structure combined floodgate, has certain potential safety hazard when using.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the electric leakage circuit breaker among the prior art and utilizing electric leakage actuating mechanism as middle transmission part, lead to holistic transmission process comparatively complicated, and the transmission part of participation is many, the slow problem of production assembly speed to it is simple to provide a transmission process, and it is few to participate in driven part, the quick electric leakage circuit breaker of production assembly speed.

The utility model provides a leakage circuit breaker, including separating L utmost point unit and the N utmost point unit that sets up in the shell structure, L utmost point unit includes operating device and receives the L utmost point contact structure of actuating of operating device execution divide-shut brake action, N utmost point unit includes electric leakage trip gear and N utmost point contact structure;

the operating mechanism drives an N-pole moving contact of the N-pole contact structure to be in contact with or disconnected from an N-pole static contact through a linkage structure, the linkage structure comprises a transmission rod and a biasing member, the transmission rod is connected with the operating mechanism and the N-pole moving contact, the biasing member is connected between the N-pole moving contact and the transmission rod, the biasing member is elastically deformed by extrusion of the transmission rod when the transmission rod drives the N-pole moving contact to perform closing motion, applies biasing force tending to the closing motion direction of the N-pole moving contact, and gradually restores deformation when the transmission rod drives the N-pole moving contact to perform opening motion;

the operating mechanism comprises an electric leakage tripping plate movably arranged in the N pole unit in a penetrating mode, the electric leakage tripping device is provided with a driving structure for pushing the electric leakage tripping plate to act when triggered, and the operating mechanism trips and opens a brake when the electric leakage tripping plate is pushed by the driving structure and drives the L pole contact structure and the N pole contact structure to execute the brake opening action.

In the above leakage circuit breaker, the L pole unit and the N pole unit respectively include an L pole housing and an N pole housing that are involutively combined to form the housing structure, and a first through hole through which the leakage trip plate can pass and a second through hole through which the other end of the transmission rod can pass and be connected to the operating mechanism are provided between the L pole housing and the N pole housing.

In the above earth leakage circuit breaker, the transmission rod and the biasing member are respectively connected to two side surfaces of the N-pole moving contact, a driving slot is arranged on the N-pole moving contact, one end of the transmission rod is slidably arranged in the driving slot, and one end of the biasing member extends to a port of the driving slot to be abutted against and matched with one end of the transmission rod.

In the leakage circuit breaker, the N-pole moving contact is rotatably disposed in the N-pole housing through a rotating shaft, the biasing member is a torsion spring sleeved on the rotating shaft, and the other end of the biasing member is hooked and clamped against a side wall of the N-pole moving contact, which is opposite to the N-pole static contact.

In foretell electric leakage circuit breaker, electric leakage trip gear include with the electric leakage coil that electric leakage trip plate set up relatively, the drive structure is for wearing to establish drive lever on the electric leakage coil, the drive lever is in can stretch out under the magnetic field effect that the electric leakage coil circular telegram produced the one end of electric leakage coil is supported and is pushed away electric leakage trip plate, in order to drive operating device carries out the separating brake action.

In foretell electric leakage circuit breaker, electric leakage trip gear is still including sliding the setting and is in the instruction slider of the other end of earth leakage coil, and the intercommunication the outside instruction through-hole of N utmost point casing, and to instruct the slider to apply the orientation instruct the reset spring that the through-hole removed, instruct to be equipped with the holding on the slider reset spring's storage tank, it extends to correspond to be provided with on the N utmost point casing limiting plate in the storage tank, reset spring's both ends respectively the butt is in the upper end of storage tank with on the limiting plate, instruct the slider to have and receive its one end of reset spring drive is followed instruct the through-hole to stretch out the outer primary importance of N utmost point casing, and insert completely in the instruction through-hole with the second place of N utmost point casing surface parallel and level.

In foretell electric leakage circuit breaker, it is equipped with the opening orientation to instruct on the slider the locking groove of actuating lever, the actuating lever is in wear to stretch when electric leakage coil does not supply with electricity and be in locking inslot will instruct the slider locking in the second position, and release when electric leakage coil supplies with electricity the locking groove makes instruct the slider to be in move to the first position by the second position under reset spring's the drive.

In the above leakage circuit breaker, the operating mechanism includes a rotating block rotatably disposed in the L-pole housing, the rotating block is provided with a transmission hole adapted to the other end of the transmission rod to be inserted, and the leakage trip plate is integrally formed on a side wall of the rotating block.

In foretell electric leakage circuit breaker, still be equipped with short circuit trip gear and overload trip gear in the L utmost point unit, be equipped with on the turning block with short circuit trip gear transmission complex short circuit trip plate, short circuit trip plate with electric leakage trip plate is established respectively the both sides of turning block, drive when short circuit trip gear is triggered short circuit trip plate is in order to drive the turning block separating brake rotates, in order to order about operating device carries out the separating brake action.

In the leakage circuit breaker, a tripping rod is arranged between the overload tripping device and the rotating block, one end of the tripping rod is clamped on a bimetallic strip bending surface of the overload tripping device, the other end of the tripping rod penetrates through the mounting hole of the rotating block, and the tripping rod is pulled to drive the rotating block to open a brake when the bimetallic strip on the overload tripping device is subjected to thermal overload deformation, so that the operating mechanism is driven to execute opening action.

Compared with the prior art, the technical scheme of the utility model have the following advantage:

1. the utility model provides a residual current circuit breaker, when the residual current circuit breaker switched on the operation, operating device drive the L utmost point contact structure combined floodgate, and drive through the transfer line the N utmost point moving contact with the joint of N utmost point static contact, through the transfer line with the extrusion fit of biasing member, make the N utmost point moving contact under the biasing force effect of biasing member fast with the joint of N utmost point static contact, so that the N utmost point contact structure switched on earlier than the L utmost point contact structure, and when the residual current circuit breaker appeared the electric leakage separating brake, the drive structure on the electric leakage trip gear can support and push away the drive of electric leakage trip plate the operating device separating brake rotates, operating device drives the N utmost point contact structure and the L utmost point contact structure separating brake, the benefit of design like this lies in, the electric leakage trip gear directly with operating device forms the transmission fit, the N-pole moving contact structure has the advantages that a transfer transmission part is not needed to be arranged, the structure is more compact, the layout is reasonable, the transmission flow is simplified, the assembly difficulty is simplified, the assembly speed during production of products is increased, meanwhile, the closing speed of the N-pole moving contact is increased through the biasing force applied by the biasing part, the N-pole contact structure is closed before the L-pole contact structure, the problem that equipment is burnt out due to the fact that the L-pole contact structure is jointed and closed first is solved, and the safety of the products during use is improved.

2. The utility model provides a residual current circuit breaker, through setting up the drive slotted hole makes the transfer line is in can also follow after the combined floodgate of N utmost point contact structure the drive slotted hole slides, avoids the transfer line appears the card and dies to lead to the unable combined floodgate problem of L utmost point contact structure to take place, is in simultaneously operating device carries out the separating brake operation time, the transfer line can be followed the drive slotted hole is slided after one section distance and is pulled again the N utmost point moving contact with the separation of N utmost point static contact ensures N utmost point contact structure is later than L utmost point contact structure separating brake realizes that residual current circuit breaker's N closes earlier the function of back branch mutually, has improved the security when the product uses.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the residual current circuit breaker provided by the present invention;

fig. 2 is a schematic diagram of the internal structure of the L-pole unit of the residual current circuit breaker shown in fig. 1;

FIG. 3 is a schematic structural view of the operating mechanism shown in FIG. 2;

fig. 4 is a schematic diagram of the internal structure of the N-pole unit of the residual current circuit breaker shown in fig. 1;

fig. 5 is a schematic structural diagram of the electrical leakage trip device shown in fig. 4 when electrical leakage is tripped;

FIG. 6 is a schematic structural view of the indicating slider shown in FIG. 4;

fig. 7 is a partial enlarged structural schematic view of the N-pole contact structure shown in fig. 4 when the switch is closed;

description of reference numerals:

1-a housing structure; 11-L pole housing; 12-an N-pole housing; 13-a first via; 14-a second via;

a 2-L pole unit; a 21-L pole contact configuration; 22-short circuit trip device; 23-overload trip means; 24-bimetallic strip;

a 3-N pole unit; a 31-N pole contact structure; a 32-N pole moving contact; 33-N pole static contact; 34-a drive slot; 35-a rotating shaft;

4-an operating mechanism; 41-creepage tripping plate; 42-a turning block; 43-a drive bore; 44-short circuit trip plate; 45-trip bar; 46-mounting holes;

5-leakage tripping device; 51-leakage coil; 52-a drive rod; 53-indicating slider; 54-indicating a via; 55-a return spring; 56-a containing groove; 57-limiting plate; 58-locking groove;

6-linkage structure; 61-a transmission rod; 62-a biasing member.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment is described in detail below with reference to the accompanying drawings:

the utility model provides a residual current circuit breaker as shown in fig. 1-7, including separating L utmost point unit 2 and the N utmost point unit 3 that sets up in shell structure 1, L utmost point unit 2 includes operating device 4 and receives the L utmost point contact structure 21 of operating device 4's drive execution divide-shut brake action, N utmost point unit 3 includes electric leakage trip gear 5 and N utmost point contact structure 31;

the operating mechanism 4 drives the N-pole moving contact 32 of the N-pole contact structure 31 to contact or disconnect with the N-pole stationary contact 33 through the linkage structure 6, the linkage structure 6 includes a transmission rod 61 connecting the operating mechanism 4 and the N-pole moving contact 32, and a biasing member 62 connected between the N-pole moving contact 32 and the transmission rod 61, the biasing member 62 is elastically deformed by the extrusion of the transmission rod 61 when the transmission rod 61 drives the N-pole moving contact 32 to perform a closing motion, applies a biasing force to the N-pole moving contact 32 toward a closing motion direction thereof, and gradually restores to be deformed when the transmission rod 61 drives the N-pole moving contact 32 to perform an opening motion;

the operating mechanism 4 comprises an electric leakage tripping plate 41 movably arranged in the N pole unit 3 in a penetrating mode, the electric leakage tripping device 5 is provided with a driving structure which pushes the electric leakage tripping plate 41 to act when triggered, and the operating mechanism 4 trips and opens a brake when the electric leakage tripping plate 41 is pushed by the driving structure and drives the L pole contact structure 21 and the N pole contact structure 31 to execute brake opening action.

The above-mentioned embodiment is a core technical solution of this embodiment, when the electrical leakage breaker performs a closing operation, the operating mechanism 4 drives the L-pole contact structure 21 to close, and drives the N-pole moving contact 32 to be connected with the N-pole stationary contact 33 through the transmission rod 61, and through the press fit between the transmission rod 61 and the biasing member 62, the N-pole moving contact 32 is quickly connected with the N-pole stationary contact 33 under the biasing force of the biasing member 62, so that the N-pole contact structure 31 is closed before the L-pole contact structure 21, and when the electrical leakage breaker has an electrical leakage breaking, the driving structure on the electrical leakage tripping device 5 pushes the electrical leakage tripping plate 41 to drive the operating mechanism 4 to open and rotate, and the operating mechanism 4 drives the N-pole contact structure 31 and the L-pole contact structure 21 to open, the electric leakage tripping device 5 is directly in transmission fit with the operating mechanism 4, a transfer transmission part is not needed to be arranged, the structure is more compact, the layout is reasonable, the transmission flow is simplified, the assembly difficulty is also simplified, the assembly speed during product production is improved, the closing speed of the N-pole moving contact 32 is improved through the biasing force exerted by the biasing member 62, the N-pole contact structure 31 is closed before the L-pole contact structure 21, the problem of equipment burnout caused by the joint of the L-pole contact structure 21 and the prior closing is avoided, and the safety of the product in use is improved.

As a specific structural arrangement, the L pole unit 2 and the N pole unit 3 respectively include an L pole shell 11 and an N pole shell 12 which are formed by involution, a first through hole 13 through which the electric leakage tripping plate 41 can pass is arranged between the L pole shell 11 and the N pole shell 12, the other end of the transmission rod 61 can pass through and be connected with a second through hole 14 of the operating mechanism 4, and an installation channel is provided for the transmission rod 61 and the electric leakage tripping plate 41 by using the first through hole 13 and the second through hole 14, so that when the operating mechanism 4 is in opening and closing operation, the other end of the transmission rod 61 slides in the first through hole 13, and the electric leakage tripping plate 41 slides in the second through hole 14, so that the two can not collide with the shell structure 1 to cause a jamming problem.

As shown in fig. 4, the transmission rod 61 and the biasing member 62 are respectively connected to two side surfaces of the N-pole moving contact 32, the N-pole moving contact 32 is provided with a driving slot 34, one end of the transmission rod 61 is slidably inserted into the driving slot 34, by providing the driving slot 34, the transmission rod 61 can also slide along the driving slot 34 after the N-pole contact structure 31 is closed, so as to avoid the problem that the L-pole contact structure 21 cannot be closed due to the locking of the transmission rod 61, and at the same time, when the operating mechanism 4 performs a switching-off operation, the transmission rod 61 can slide along the driving slot 34 for a distance and then pull the N-pole moving contact 32 to separate from the N-pole stationary contact 33, so as to ensure that the N-pole contact structure 31 is later than the L-pole contact structure 21, thereby realizing the function of switching-off after N-phase of the earth leakage breaker is first closed, the safety of the product in use is improved.

As a specific structural arrangement, the N-pole moving contact 32 is rotatably disposed in the N-pole housing 12 through a rotating shaft 35, the biasing member 62 is a torsion spring sleeved on the rotating shaft 35, a positioning boss is disposed on a side of the N-pole moving contact 32 opposite to the N-pole stationary contact 33, one end of the biasing member 62 extends to a port of the driving slot 34 and is abutted against one end of the transmission rod 61, the other end of the biasing member 62 is hooked and clamped against a side wall of the positioning boss, the positioning boss is configured to perform a quick positioning and mounting function for the biasing member 62, the other end of the biasing member 62 is abutted against the positioning boss when the biasing member 62 is deformed and does not displace, so that a biasing force applied by the biasing member 62 to the N-pole moving contact 32 can reliably act on the N-pole moving contact 32, therefore, the contact pressure between the N-pole moving contact 32 and the N-pole fixed contact 33 is increased, the N-pole moving contact 32 is ensured to be tightly attached to the N-pole fixed contact 33, the problem of poor contact is avoided, and the stability of a product in use is improved.

The specific structure of the electrical leakage tripping device 5 is described in detail below with reference to fig. 4 to 6:

leakage trip gear 5 include with the relative electric leakage coil 51 that sets up of electric leakage tripping plate 41, electric leakage coil 51 is equipped with the middle part cavity, the drive structure is for wearing to establish actuating lever 52 on the cavity of middle part, actuating lever 52 is in can stretch out under the magnetic field effect that electric leakage coil 51 circular telegram produced the one end of electric leakage coil 51 is supported and is pushed away electric leakage tripping plate 41, in order to drive operating device 4 carries out the action of separating brake, just still be equipped with the drive in the cavity of middle part the actuating lever 52 stretches out the drive spring of the electric leakage coil 51 other end, the actuating lever 52 is in drive spring's biasing force with electric leakage coil 51's magnetic field force effect is followed down the cavity of middle part is sharp reciprocating motion, promptly electric leakage coil 51 stretches out its one end when circular telegram, and stretches out its other end when electric leakage coil 51 cuts off the power supply.

In order to realize the electric leakage indication function of the electric leakage circuit breaker, the electric leakage trip device 5 further includes an indication slider 53 slidably disposed at the other end of the electric leakage coil 51, an indication through hole 54 communicating with the outside of the N-pole housing 12, and a return spring 55 applying a movement toward the indication through hole 54 to the indication slider 53, a containing groove 56 containing the return spring 55 is disposed on the indication slider 53, a limiting plate 57 extending into the containing groove 56 is correspondingly disposed on the N-pole housing 12, two ends of the return spring 55 are respectively abutted against the upper end of the containing groove 56 and the limiting plate 57, since the limiting plate 57 is inserted into the containing groove 56, the containing groove 56 can change the distance with the limiting plate 57 when moving along with the indication slider 53, thereby extruding the return spring 55 to deform the return spring 55, the indication slider 53 has a first position in which one end of the indication slider is driven by the return spring 55 to extend out of the N-pole housing 12 from the indication through hole 54, and a second position in which the indication slider 53 is completely inserted into the indication through hole 54 and flush with the surface of the N-pole housing 12, that is, when the indication slider 53 is in the first position, the electrical leakage circuit breaker is in an electrical leakage state, when the indication slider 53 is in the second position, the electrical leakage circuit breaker is in a normal working state, and when the indication slider 53 is in the first position, the limiting plate 57 abuts against the bottom end of the accommodating groove 56 to limit the indication slider 53 to move continuously, so that a limiting effect is achieved, and the indication slider 53 and the N-pole housing 12 are ensured to keep fixed relative positions.

As a specific structure setting, be equipped with the opening orientation on the instruction slider 53 the locking groove 58 of actuating lever 52, actuating lever 52 is in when electric leakage coil 51 is not circular telegram is worn to stretch in the locking groove 58, it is right to instruct slider 53 to play the locking effect, ensure instruct slider 53 to lock in the second position, simultaneously reset spring 55 receives instruct slider 53 extrusion to be in deformation and hold the power state, and release when electric leakage coil 51 is circular telegram locking groove 58 makes instruct slider 53 to be in move to the first position by the second position under reset spring 55's the drive, make instruct slider 53 to reach its one end when the first position and follow instruct through-hole 54 department to stretch out N utmost point casing 12 is outside, reminds the user this circuit breaker to appear the electric leakage problem.

As shown in fig. 3, the operating mechanism 4 includes a rotating block 42 rotatably disposed in the L-pole housing 11, a transmission hole 43 adapted to be inserted into the other end of the transmission rod 61 is disposed on the rotating block 42, the leakage tripping plate 41 is integrally formed on a sidewall of the rotating block 42, the L-pole contact structure 21 includes an L-pole moving contact and an L-pole stationary contact, both the L-pole moving contact and the rotating block 42 are mounted on a contact base, so that when the rotating block 42 is rotated by a force, the L-pole moving contact and the L-pole stationary contact are driven by the contact base to be connected or disconnected.

As a specific structural configuration, a short circuit trip device 22 and an overload trip device 23 are further arranged in the L pole unit 2, a short circuit trip plate 44 in transmission fit with the short circuit trip device 22 is arranged on the rotating block 42, the short circuit trip plate 44 and the leakage trip plate 41 are respectively arranged on two sides of the rotating block 42, when the short circuit trip device 22 is triggered, the short circuit trip plate 44 is driven to drive the rotating block 42 to perform tripping operation, so that the short circuit trip function of the leakage circuit breaker is realized, a trip rod 45 is further arranged between the overload trip device 23 and the rotating block 42, one end of the trip rod 45 is clamped on a curved surface of a bimetallic strip 24 of the overload trip device 23, the other end of the trip rod penetrates through a mounting hole 46 of the rotating block 42, and when thermal overload deformation of the bimetallic strip 24 on the overload trip device 23 reaches a certain degree, the trip is pulled The rod 45 drives the rotating block 42 to perform opening rotation, so that the operating mechanism 4 is driven to execute opening operation, and the overload tripping function of the electric leakage circuit breaker is realized.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. The utility model provides a residual current circuit breaker, includes that the separation sets up L utmost point unit (2) and N utmost point unit (3) in shell structure (1), L utmost point unit (2) include operating device (4) and receive L utmost point contact structure (21) of the action of opening and shutting are carried out in the drive of operating device (4), N utmost point unit (3) are including electric leakage trip gear (5) and N utmost point contact structure (31), its characterized in that:

the operating mechanism (4) drives an N pole moving contact (32) of the N pole contact structure (31) to be in contact with or disconnected from an N pole static contact (33) through a linkage structure (6), the linkage structure (6) comprises a transmission rod (61) which is connected with the operating mechanism (4) and the N pole moving contact (32), and a biasing member (62) which is connected between the N pole moving contact (32) and the transmission rod (61), wherein the biasing member (62) is elastically deformed by extrusion of the transmission rod (61) when the transmission rod (61) drives the N pole moving contact (32) to perform closing motion, applies a biasing force which tends to the closing motion direction of the N pole moving contact (32), and gradually restores to deform when the transmission rod (61) drives the N pole moving contact (32) to perform opening motion;

operating device (4) wear to establish including the activity leakage tripping plate (41) in the N utmost point unit (3), electric leakage trip gear (5) have when being triggered promote the drive structure of leakage tripping plate (41) action, operating device (4) are in leakage tripping plate (41) quilt when drive structure promotes the tripping and separating brake action, and drive L utmost point contact structure (21) and N utmost point contact structure (31) execution separating brake action.

2. The residual current circuit breaker according to claim 1, characterized in that the L pole unit (2) and the N pole unit (3) respectively comprise an L pole shell (11) and an N pole shell (12) which are combined to form the shell structure (1), a first through hole (13) for the leakage tripping plate (41) to pass through is arranged between the L pole shell (11) and the N pole shell (12), and a second through hole (14) for the other end of the transmission rod (61) to pass through and connect with the operating mechanism (4).

3. The residual current circuit breaker according to claim 2, wherein the transmission rod (61) and the biasing member (62) are respectively connected to two side surfaces of the N-pole moving contact (32), a driving slot (34) is formed in the N-pole moving contact (32), one end of the transmission rod (61) is slidably inserted into the driving slot (34), and one end of the biasing member (62) extends to a port of the driving slot (34) and is abutted against one end of the transmission rod (61).

4. The residual current circuit breaker according to claim 3, wherein the N-pole moving contact (32) is rotatably disposed in the N-pole housing (12) through a rotating shaft (35), the biasing member (62) is a torsion spring sleeved on the rotating shaft (35), and the other end of the biasing member (62) is hooked to a side wall of the N-pole moving contact (32) opposite to the N-pole stationary contact (33).

5. The residual current circuit breaker according to claim 4, wherein the leakage tripping device (5) comprises a leakage coil (51) arranged opposite to the leakage tripping plate (41), the driving structure is a driving rod (52) arranged on the leakage coil (51) in a penetrating manner, and one end of the driving rod (52) extending out of the leakage coil (51) is pushed against the leakage tripping plate (41) under the action of a magnetic field generated by electrifying the leakage coil (51) so as to drive the operating mechanism (4) to perform the opening action.

6. The residual current circuit breaker according to claim 5, wherein the residual current tripping device (5) further comprises an indicating slider (53) slidably disposed at the other end of the residual current coil (51), an indicating through hole (54) communicating with the outside of the N-pole case (12), and a return spring (55) for applying a movement to the indicating slider (53) toward the indicating through hole (54), wherein a receiving groove (56) for receiving the return spring (55) is disposed on the indicating slider (53), a stopper plate (57) extending into the receiving groove (56) is correspondingly disposed on the N-pole case (12), two ends of the return spring (55) are respectively abutted against the upper end of the receiving groove (56) and the stopper plate (57), the indicating slider (53) has a first position in which one end thereof is driven by the return spring (55) to extend out of the N-pole case (12) from the indicating through hole (54), and a second position of being completely inserted into the indication through hole (54) and being flush with the surface of the N pole shell (12).

7. The residual current circuit breaker according to claim 6, wherein said indicating slider (53) is provided with a locking groove (58) having an opening facing said driving rod (52), said driving rod (52) is inserted into said locking groove (58) when said leakage coil (51) is not energized, to lock said indicating slider (53) at the second position, and said locking groove (58) is pushed out when said leakage coil (51) is energized, to move said indicating slider (53) from the second position to the first position by the driving of said return spring (55).

8. The residual current circuit breaker according to any one of claims 1-7, wherein said operating mechanism (4) comprises a rotating block (42) rotatably disposed in the L-pole housing (11), said rotating block (42) is provided with a transmission hole (43) adapted to the insertion of the other end of said transmission rod (61), and said residual current releasing plate (41) is integrally formed on the side wall of said rotating block (42).

9. The residual current circuit breaker according to claim 8, wherein a short circuit tripping device (22) and an overload tripping device (23) are further arranged in the L-pole unit (2), a short circuit tripping plate (44) in transmission fit with the short circuit tripping device (22) is arranged on the rotating block (42), the short circuit tripping plate (44) and the leakage tripping plate (41) are respectively arranged on two sides of the rotating block (42), and when the short circuit tripping device (22) is triggered, the short circuit tripping plate (44) is driven to drive the rotating block (42) to perform brake opening rotation so as to drive the operating mechanism (4) to perform brake opening operation.

10. The residual current circuit breaker according to claim 9, characterized in that a trip bar (45) is arranged between the overload trip device (23) and the rotating block (42), one end of the trip bar (45) is clamped on the bending surface of the bimetallic strip (24) of the overload trip device (23), the other end of the trip bar is arranged in the mounting hole (46) of the rotating block (42) in a penetrating way, and the bimetallic strip (24) on the overload trip device (23) is deformed due to thermal overload, and pulls the trip bar (45) to drive the rotating block (42) to carry out opening operation, so as to drive the operating mechanism (4) to carry out opening operation.

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