CN107393770A - A kind of RCCB - Google Patents

Abstract

The invention relates to a leakage circuit breaker, in particular to a leakage circuit breaker with a reasonable and compact internal structure. The technical solution adopted in the present invention is: a leakage circuit breaker, characterized in that: the middle seat is located on the L pole arc extinguishing mechanism and is set in a depression, the L pole arc extinguishing mechanism is set in the depression, and the test pressing device includes There are buttons, torsion springs, conductive sheets and loose blocks, the torsion spring includes a first extension arm and a second extension arm, the torsion spring is arranged on the pin shaft of the base, the first extension arm of the torsion spring is placed under the button, and Press the button to swing up and down so as to realize contact or disconnection with the conductive sheet. A shoulder step is provided on the upper end surface, and a conflicting arm of the handle torsion spring of the handle operating mechanism is in contact with the shoulder step. By adopting the above scheme , The invention provides a new leakage circuit breaker with reasonable internal space layout, compact structure, flexible mechanism movement and fast breaking speed.

Description

A leakage circuit breaker

technical field

The invention relates to a leakage circuit breaker, in particular to a leakage circuit breaker with a reasonable and compact internal structure.

Background technique

Leakage circuit breakers are generally equipped with electromagnetic trippers, thermal trippers, leakage trippers, operating mechanisms, arc extinguishing channels and arc extinguishing systems. General leakage circuit breakers are extended or widened on the basis of circuit breakers. Increase the circuit board space or leakage release space, resulting in large product size, high cost, high installation cost, large assembly distribution box and other disadvantages, the usual internal space layout of the leakage circuit breaker generally adopts the following method, L pole , N-pole moving contacts are respectively fixed on the L-pole and N-pole moving contact brackets, and then the L-pole and N-pole moving contact brackets are set on both sides of the lever, and the lock and jumper are also set on the lever. At this time The volume of the mechanism is large, the movement of the mechanism is not flexible, and the breaking speed is slow. The L pole and N pole moving contacts are respectively located on both sides of the middle seat. Because the L pole and N pole moving contact brackets are set on both sides of the lever, the L pole of the mechanism part It cannot be isolated from the N pole. When breaking a large current, the arc and the conductive gas are easily short-circuited, causing the product to burst and cause the product to fail to break. And there is a risk of withstand voltage breakdown after breaking, and the arc extinguishing chamber of the L pole is small, and the N pole generally does not have an arc extinguishing chamber, so the breaking capacity of the product is low and cannot meet the user's requirements.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a new leakage circuit breaker with reasonable internal space layout, compact structure, flexible mechanism movement and fast breaking speed.

To achieve the above purpose, the technical solution adopted by the present invention is: a leakage circuit breaker, including a base, a middle seat and an upper cover, the middle seat is located between the base and the upper cover, and the first installation space is between the base and the middle seat , between the middle seat and the upper cover is the second installation space, between the base and the upper cover is the third installation space, the first installation space is provided with an N pole moving contact operating mechanism and an N pole arc extinguishing mechanism, so The second installation space is provided with an L-pole moving contact operating mechanism, an L-pole arc extinguishing mechanism, and a bimetal tripping mechanism, and the third installation space is provided with a leakage electromagnetic ring, a leakage and short-circuit tripping mechanism, and a handle operation mechanism. The mechanism is characterized in that: the middle seat is located on the L pole arc extinguishing mechanism and is set in a depression, the L pole arc extinguishing mechanism is set in the depression, and a test pressing device is provided on one side of the handle operating mechanism, and the test pressing device It includes a button, a torsion spring, a conductive piece and a movable block. The torsion spring includes a first extension arm and a second extension arm. With the pressing of the button, it can swing up and down so as to realize the contact or disconnection with the conductive sheet. The movable block is arranged on the base through the shaft. The movable block includes an upper side, a lower side, a lower bottom, an upper end, a left side and a On the right side, the upper side and the lower side are respectively in contact with or close to the edge of the base, and the left side is provided with two surfaces, one of which is in conflict with or close to the edge of the base, and the other is in contact with the conductive The conductive sheet is in contact with or close to the position to realize the limit of the conductive sheet. A shoulder step is set on the upper end surface, and a contact arm of the handle torsion spring of the handle operating mechanism is in contact with the shoulder step. A limit protrusion is set on the lower bottom surface. The platform is set correspondingly with the conflicting feet of the button to limit the pressing range of the button.

By adopting the above scheme, we make the structure of the circuit breaker simple and the layout reasonable. Specifically, the two-layer layout of the circuit breaker does not affect the function of the arc extinguishing mechanism of the L pole. Many functions have been added, such as the limit of the button, the positioning of the conductive sheet, the resistance of the torsion spring of the handle, etc., which greatly simplifies the internal mechanism of the entire circuit breaker.

A further setting of the present invention is: a power-taking mechanism is also provided on one side of the handle operating mechanism, the power-taking mechanism includes a power-taking column or a power-taking spring and a push rod that is slidably arranged on the base, and one end of the push rod Cooperate with the hinged swing end of the moving contact of the N-pole moving contact operating mechanism, and the other end is in conflict with the second extension arm of the torsion spring. The moving contact is electrically connected. When the N-pole moving contact of the N-pole moving contact operating mechanism is closed, the second extension arm pushes the push rod to move to realize the electrical connection between the second extension arm and the power-taking column or power-taking spring. When N When the N-pole moving contact of the pole-moving contact operating mechanism is opened, the hinged swing end of the N-pole moving contact pushes the push rod to move, and the push rod pushes the second extension arm to swing to realize the second extension arm and the power-taking column or power-taking The spring breaks.

By adopting the above-mentioned way of taking power, we can realize the power taking of the torsion spring through the cooperation of the N-pole moving contact, the push rod and the torsion spring. The specific principle is that when the L-pole moving contact is closed, the second extension arm Push the push rod to move to realize the electrical connection between the second extension arm and the power-taking column or the power-taking spring, so that the electricity on the moving contact of the L pole can be transmitted to the torsion spring through the power-taking column or the power-taking spring, and when the N-pole moving contact When the head is opened, the hinged swing end of the N-pole moving contact pushes the push rod to move, and the push rod pushes the second extension arm to swing to realize the disconnection of the second extension arm from the power-taking column or the power-taking spring, and the torsion spring is not charged. Here What we need to declare is that the opening or closing of the L-pole moving contact and the N-pole moving contact are interrelated.

The further setting of the present invention is: the L pole moving contact operating mechanism includes an L pole moving contact, a jumper, an L pole moving contact bracket, a lock spring, a lock buckle and a first extension spring, wherein the L pole moves The contact is fixedly arranged on the moving contact bracket, and the L-pole moving contact bracket is provided with a long through hole, and a pin shaft is arranged in the long through hole, and the two ends of the pin shaft are arranged on the middle seat and the upper cover. One end of the first extension spring is connected to the L-pole moving contact bracket, and the connection point with the L-pole moving contact bracket is located above the long through hole, and the other end of the first extension spring is fixedly connected to the middle seat or the base. The jumper is hingedly arranged on the upper end of the L-pole moving contact bracket, the jumper is connected with the handle of the handle operating mechanism through the first connecting rod, and the middle part of the locker is movably sleeved on the pin shaft through the set through hole. The upper part of the lock is extended with a conflicting foot that can interfere with the jumper to limit the rotation of the jumper. The bottom of the lock is provided with a pushing foot and a reset foot, wherein the pushing foot is set correspondingly to the push rod of the leakage and short circuit tripping mechanism. The top end of the reset foot is provided with a spring seat, and the N-pole moving contact operating mechanism includes an N-pole moving contact, a second extension spring, a connecting shaft and a collision pin, and the connecting shaft is placed on the long side above the middle seat. In the hole, the connecting shaft is connected to the N-pole moving contact and fixedly plugged with the L-pole moving contact bracket. The middle part of the N-pole moving contact is provided with an arc-shaped collision surface, and the collision pin is arranged on the middle seat and the base. Between, and corresponding to the arc-shaped contact surface, a connection hole or a connection boss is arranged above the arc-shaped contact surface of the N-pole moving contact. One end of the second tension spring is connected to the connection hole or the connection boss, and the other end Connected to the middle base or the base, the lower end of the N pole moving contact is a contact.

By adopting the above scheme, this product can also disconnect the N pole moving contact when there is a problem with the L pole moving contact operating mechanism, so as to meet the needs of special occasions. The N pole moving contact operating mechanism includes N The setting scheme of the pole moving contact, the second extension spring, the connecting shaft and the interference pin, so that the overtravel function of the N pole moving contact can be realized through the second extension spring, so that the contact effect of the contact is better. In addition, in this embodiment The N-pole moving contact operating mechanism is closed before the L-pole moving contact operating mechanism is closed, and then disconnected after opening. These actions are also conventional in this field, and we will not describe them in detail here.

The further setting of the present invention is: select the power-taking spring between the power-taking column or the power-taking spring, the base is provided with a sleeve protrusion, the power-taking spring is sleeved on the sleeve protrusion, and the The spring coil at the lower end of the power-taking spring is set close to form a non-elastic end, and the spring coil at the upper end of the power-taking spring is loosened to form an elastic end. The elastic end is resistively connected to the first tension spring to form an electrical connection, and the second extension arm of the torsion spring is arranged correspondingly to the non-elastic end.

By adopting the above scheme, we can make good use of this type of power-taking spring to realize power-taking, in which the lower ends are closed together as non-elastic ends, so that the second extension arm will be in better contact with it, and its upper end is an elastic end, so that the first A tension spring will not get stuck with the outlet of the electric spring when it moves.

The further setting of the present invention is: the button is arranged on the base and is located on the side of the handle of the handle operating mechanism, the button includes a pressing head, a baffle and a resisting foot, wherein the baffle is arranged at the lower end of the pressing head, and the button is attached to the lower end of the pressing head. It is arranged on the inner side of the base, one side of the baffle is set parallel to one side of the pressing head, and the other three sides of the baffle protrude from the corresponding side of the pressing head, and the part of the baffle protruding from the pressing head forms a blocking boss. A slot is provided on the conflicting foot, the first extension arm of the torsion spring is placed in the slot, a through hole is provided near the lower side of the movable block, and the movable block is socketed with the shaft on the base through the through hole. The right side of the movable block is set as an arc surface adapted to the handle shaft of the handle operating mechanism.

By adopting the above scheme, the setting position of the button is convenient for operation and will not cause harm to the operator. The structure of the button using the above method can well protect the operator, and the most obvious one is that it can increase the creepage distance , which greatly increases the protection level, and the setting of the card slot can make a good card position for the first extension arm.

A further setting of the present invention is that: one end of the push rod is provided with a first shoulder step, and an accommodating cavity is formed between the first shoulder step and the rib on the base, and the first extension arm of the torsion spring interferes with the accommodating cavity. In the cavity, a protrusion is provided on the hinged swing end of the N pole moving contact of the N pole moving contact operating mechanism, and the protrusion cooperates with the other end of the push rod to push the push rod to slide, and the base is provided with The chute, the push rod is placed in the chute, the push rod is provided with a second shoulder at the hinged swing end of the N-pole moving contact, and the chute is provided with a limiting boss.

By adopting the above solution, the movement of the push rod is limited, which can well protect the moving contact and the torsion spring.

The present invention will be further described below in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the perspective view of the embodiment of the present invention;

Fig. 2 is the internal structure diagram after removing the upper cover of the embodiment of the present invention;

Fig. 3 is the internal structure diagram of the opening after the base is removed according to the embodiment of the present invention;

Fig. 4 is the internal structure diagram of closing after the base is removed according to the embodiment of the present invention;

Fig. 5 is a structural diagram of a seat in an embodiment of the present invention;

Fig. 6 is a perspective view reflecting the position of the button according to the embodiment of the present invention;

Fig. 7 is a structural diagram reflecting a living block according to an embodiment of the present invention;

Fig. 8 is a cooperative structure diagram of a button and a torsion spring according to an embodiment of the present invention;

Fig. 9 is a structural diagram of the base of the embodiment of the present invention;

Fig. 10 is a structural diagram of a push rod according to an embodiment of the present invention;

Fig. 11 is a structural diagram of an electric spring according to an embodiment of the present invention;

Fig. 12 is a cross-sectional view of the accommodating cavity according to the embodiment of the present invention.

detailed description

As shown in Figures 1-12, a leakage circuit breaker includes a base 1, a middle base 2 and an upper cover 3, the middle base 2 is located between the base 1 and the upper cover 3, and the base 1 and the middle base 2 It is the first installation space A, between the middle seat 2 and the upper cover 3 is the second installation space B, and between the base 1 and the upper cover 3 is the third installation space C, here between refers to the space where the two components are facing each other , the first installation space A is provided with N pole moving contact operating mechanism A1 and N pole arc extinguishing mechanism A2, and the second installation space B is provided with L pole moving contact operating mechanism B1, L pole arc extinguishing mechanism Mechanism B2 and bimetal tripping mechanism B3, the third installation space C is provided with leakage electromagnetic ring C1, leakage and short circuit tripping mechanism C2 and handle operating mechanism C3, the above-mentioned mechanism is also used in existing circuit breakers It is common, and will not be described in detail in this embodiment. In this embodiment, the middle seat 2 is set in a recess 21 at the L pole arc extinguishing mechanism B2, and the L pole arc extinguishing mechanism B2 is set on At the depression 21, a test pressing device 4 is provided on one side of the handle operating mechanism C3. The test pressing device 4 includes a button 41, a torsion spring 42, a conductive sheet 43 and a movable block 44, and the torsion spring 42 includes a first extension arm. 421 and the second extension arm 422, the torsion spring 42 is arranged on the boss or pin shaft of the base 1, the first extension arm 421 of the torsion spring 42 is placed under the button 41, and it can swing up and down with the pressing of the button 41 so as to realize the The contact or disconnection of the conductive sheet 43, the movable block 44 is arranged on the base 1 through the shaft, and the movable block 44 includes an upper side 441, a lower side 442, a lower bottom 443, an upper end 444, a left side 445 and a right side. The side 446, the upper side 441 and the lower side 442 are respectively in contact with or close to the edge of the base 1, and the edge here can be the edge of the outer periphery or the edge of the inner rib, and the left side 445 is arranged with Two surfaces, one surface 4451 is in contact with or close to the edge of the base 1, and the other surface 4452 is in contact with or close to the conductive sheet 43 to limit the position of the conductive sheet 43. The upper end surface 444 is provided with a shoulder step 4441 , one conflicting arm C311 of the handle torsion spring C31 of the handle operating mechanism C3 is in conflict with the shoulder step 4441, and the other conflicting arm C312 of the handle torsion spring C31 is in conflict with the groove of the handle, and the lower bottom surface 443 is provided with a limiting boss 4431 , the limiting boss 4431 is set corresponding to the contacting foot of the button 41 to limit the pressing range of the button 41 . Using the above scheme, we make the circuit breaker simple in structure and reasonable in layout. Specifically, the two-layer layout of the circuit breaker does not affect the function of the L pole arc extinguishing mechanism B2. The test pressing device 4 adopts the above method, and only one movable block 44 is used. The components solve many functions, such as the limit function of the button 41, the positioning function of the conductive sheet 43, the resistance function of the handle torsion spring C31, etc., which greatly simplifies the internal mechanism of the entire circuit breaker.

In the embodiment of the present invention, a power-taking mechanism 5 is also provided on one side of the handle operating mechanism C3. The power-taking mechanism 5 includes a power-taking column or a power-taking spring 51 and a push rod 52 slidingly arranged on the base 1. One end of the push rod 52 cooperates with the hinged swing end of the moving contact of the N-pole moving contact operating mechanism A1, and the other end cooperates with the second extension arm 422 of the torsion spring 42. The power-taking column or the power-taking spring 51 It is electrically connected with the L-pole moving contact of the L-pole moving contact operating mechanism B1. When the N-pole moving contact of the N-pole moving contact operating mechanism A1 is closed, the second extension arm 422 pushes the push rod 52 to move to realize the second The extension arm 422 is electrically connected to the power-taking column or the power-taking spring 51. When the N-pole moving contact of the N-pole moving contact operating mechanism A1 is opened, the hinged swing end of the N-pole moving contact pushes the push rod 52 to move, The push rod 52 pushes the second extension arm 422 to swing to realize that the second extension arm 422 is disconnected from the power-taking column or the power-taking spring 51; adopting the above-mentioned way to take power, we can well pass the N-pole moving contact, the push rod 52 and the torsion spring 51. The cooperation of the spring 42 realizes the power-taking of the torsion spring 42. The specific principle is that when the L-pole moving contact B11 is closed, the second extension arm 422 pushes the push rod 52 to move to realize the second extension arm 422 and the power-taking column or the power-taking column. The spring 51 is electrically connected, so that the electricity on the L-pole moving contact can be transmitted to the torsion spring 42 through the power-taking column or the power-taking spring 51. When the N-pole moving contact is opened, the hinge of the N-pole moving contact A11 The swing end A111 pushes the push rod 52 to move, and the push rod 52 pushes the second extension arm 422 to swing to realize that the second extension arm 422 is disconnected from the power-taking column or the power-taking spring 51, and the torsion spring 42 is not charged. What we need to declare here is The opening or closing of the L-pole movable contact and the N-pole movable contact is interrelated. Here, the torsion spring 42 drives the push button 41 to make the first extension arm 421 contact the conductive sheet 43, thereby making the conductive sheet 43 energized. , that is, the circuit in contact with the conductive sheet 43 is tested.

In the embodiment of the present invention, the L pole moving contact operating mechanism B1 includes the L pole moving contact B11, the jumper B12, the L pole moving contact bracket B13, the lock spring B14, the lock B15 and the first pull Spring B16, wherein the L-pole moving contact B11 is fixedly arranged on the moving contact bracket B13, the L-pole moving contact bracket B13 is provided with a long through hole, and a pin shaft is arranged in the long through hole, and the two ends of the pin shaft are arranged On the middle seat 2 and the upper cover 1, one end of the first tension spring B16 is connected to the L-pole moving contact bracket B13, and the connection point with the L-pole moving contact bracket B13 is located above the long through hole. The other end of the tension spring B16 is fixedly connected to the middle seat 2 or the base 1. The jumper B12 is hingedly arranged on the upper end of the L-pole movable contact bracket B13, and the jumper B12 and the handle of the handle operating mechanism C3 pass through the first The connecting rod is connected, and the middle part of the lock buckle B15 is movably sleeved on the pin shaft through the set through hole, and the upper part of the lock buckle B15 is extended with a conflicting foot that can interfere with the jumper buckle B12 and limit the rotation of the jumper buckle B12. Below B15, there are pushing pins B151 and reset pins B152, wherein the pushing pins B151 are set corresponding to the push rods of leakage and short-circuit tripping mechanism C2, and the top of the reset pins B152 is provided with a spring seat B1521, and the N-pole moving contact The head operating mechanism A1 includes an N-pole moving contact A11, a second tension spring A12, a connecting shaft A13 and a collision pin A14. The connecting shaft A13 is placed in the long hole above the middle seat 2, and the connecting shaft A13 is connected to the The moving contact A11 is fixedly plugged with the L-pole moving contact bracket B13, the middle part of the N-pole moving contact A11 is provided with an arc-shaped collision surface, and the collision pin A14 is arranged between the middle seat 2 and the base 1, And corresponding to the arc-shaped contact surface, a connection hole or a connection boss is arranged above the arc-shaped contact surface of the N-pole moving contact A11. One end of the second tension spring A12 is connected to the connection hole or the connection boss, and the other end is connected to On the middle seat 2 or the base 1, the lower end of the N-pole moving contact A11 is a contact point. With the above scheme, this product can make the N-pole moving contact even when there is a problem with the L-pole moving contact operating mechanism B1 The head A11 is disconnected to meet the needs of special occasions. The N pole moving contact operating mechanism A1 includes the arrangement scheme of the N pole moving contact A11, the second tension spring A12, the connecting shaft A13 and the interference pin A14, which can be passed through The second tension spring A12 realizes the overtravel function of the N-pole moving contact A11, so that the contact effect is better. In addition, in this embodiment, the N-pole moving contact operating mechanism A1 is closed before the L-pole moving contact operating mechanism B1 is closed. Closing, disconnecting and then disconnecting, these actions are also conventional in this field, and we will not describe them in detail here.

In the embodiment of the present invention, the power-taking spring 51 is selected among the power-taking posts or the power-taking springs 51, and the base 1 is provided with a sleeve protrusion 11, and the power-taking spring 51 is sleeved on the sleeve protrusion. On the column 11, the spring coil at the lower end of the power-taking spring 51 is arranged close to form a non-elastic end 511, and the coil at the upper end of the power-taking spring 51 is loosely arranged to form an elastic end 512, and the non-elastic end 511 of the power-taking spring 51 is set Connected to the socketed post 11 , the upper elastic end 512 of the power-taking spring 51 resists and connects with the first tension spring B16 to form an electrical connection, and the second extension arm 422 of the torsion spring 42 is arranged correspondingly to the non-elastic end 511 . With the above solution, we can make good use of this type of power-taking spring 51 to achieve power-taking, wherein the lower ends are closed together to form a non-elastic end 511, so that the second extension arm 422 will be in contact with it better, and its upper end is an elastic end 512 , the first extension spring B16 will not be stuck or disengaged from the outgoing line of the power-taking spring 51 when moving like this. Of course, we can also directly make the metal tube without setting the power-taking spring 51.

In the embodiment of the present invention, the button is arranged on the base and on the side of the handle of the handle operating mechanism C3. The button 41 includes a pressing head 411, a baffle 412 and a resisting foot 413, wherein the baffle 412 is arranged on the pressing head 411 The button 41 is set close to the inner side of the base 1, one side of the baffle 412 is set at the same level as one side of the pressing head 411, and the other three sides of the baffle 412 protrude from the corresponding side of the pressing head 411. The part of the baffle plate 412 that protrudes from the pressing head 411 forms a shielding boss, and the resisting foot 413 is provided with a slot 4131, and the first extension arm 421 of the torsion spring 42 is placed in the slot 4131, and the movable block 44 is close to the bottom. The side 442 is provided with a through hole through which the movable block 44 is socketed with the shaft on the base 1, and the right side 446 of the movable block 44 is set as an arc surface adapted to the handle shaft of the handle operating mechanism C3; With the above solution, the setting position of the button 41 is convenient for operation, and will not cause harm to the operator. The structure of the button in the above way can well protect the operator, and the most obvious thing is that the creepage distance can be increased very well. , which greatly increases the protection level, and the setting of the card slot can make a good card position for the first extension arm.

In the embodiment of the present invention, one end of the push rod 52 is provided with a first shoulder step 521, and an accommodating cavity 522 is formed between the first shoulder step 521 and the rib on the base 1, and the first step of the torsion spring 42 The extension arm 421 is in contact with the accommodating cavity 522, and the hinged swing end of the N-pole movable contact A11 of the N-pole movable contact operating mechanism A1 is provided with a protrusion A111, and the protrusion A111 is connected to the other end 523 of the push rod 52. Cooperate with the push rod 52 to slide, the base 1 is provided with a chute 12, the push rod 52 is placed in the chute 12, and the push rod 52 is set on the hinged swing end of the N-pole moving contact. There is a second shoulder step 524, and the chute 12 is provided with a limiting boss, so that the movement of the push rod 52 is limited, and the N-pole moving contact A1 and the torsion spring 42 can be well protected.

The above-mentioned embodiments are only used to explain the inventive concept of the present invention, but not to limit the protection of the rights of the present invention. Any insubstantial changes made to the present invention by using this concept should fall within the scope of protection of the present invention.

Claims (7)

1. An earth leakage circuit breaker, including a base, a middle base and an upper cover, the middle base is located between the base and the upper cover, wherein the first installation space is between the base and the middle base, and the second installation space is between the middle base and the upper cover. Two installation spaces, the third installation space is between the base and the upper cover, the N pole moving contact operating mechanism and the N pole arc extinguishing mechanism are set in the first installation space, and the L pole is set in the second installation space The moving contact operating mechanism, the L-pole arc extinguishing mechanism and the bimetal tripping mechanism, the leakage electromagnetic ring, the leakage and short circuit tripping mechanism and the handle operating mechanism are arranged in the third installation space, and the feature is that the middle seat The arc extinguishing mechanism of the L pole is arranged in a depression, and the arc extinguishing mechanism of the L pole is set in the depression. A test pressing device is provided on one side of the handle operating mechanism. The test pressing device includes a button, a torsion spring, a conductive sheet and The movable block, the torsion spring includes a first extension arm and a second extension arm, the torsion spring is arranged on the pin shaft of the base, the first extension arm of the torsion spring is placed under the button, and it can swing up and down with the pressing of the button so as to realize the The contact or disconnection of the conductive sheet, the movable block is arranged on the base through the shaft, the movable block includes an upper side, a lower side, a lower bottom, an upper end, a left side and a right side, the upper side, the lower side The side surfaces are respectively in contact with or close to the edge of the base, and the left side is provided with two surfaces, one of which is in contact with or close to the edge of the base, and the other surface is in contact with or close to the conductive sheet to realize the contact of the conductive sheet. Position limit, the upper end surface is provided with a shoulder step, a conflicting arm of the handle torsion spring of the handle operating mechanism is in conflict with the shoulder step, and the lower bottom surface is provided with a limit boss, the limit boss and the button The corresponding setting of the conflicting pin limits the pressing range of the button. 2. The earth leakage circuit breaker according to claim 1, characterized in that: a power-taking mechanism is also provided on one side of the handle operating mechanism, and the power-taking mechanism includes a power-taking column or a power-taking spring and a slide set on the base One end of the push rod cooperates with the hinged swing end of the moving contact of the N-pole moving contact operating mechanism, and the other end cooperates with the second extension arm of the torsion spring. The L-pole moving contact of the L-pole moving contact operating mechanism is electrically connected. When the N-pole moving contact of the N-pole moving contact operating mechanism is closed, the second extension arm pushes the push rod to move to realize the connection between the second extension arm and the power supply. When the N-pole movable contact of the N-pole movable contact operating mechanism is opened, the hinged swing end of the N-pole movable contact pushes the push rod to move, and the push rod pushes the second extension arm to swing to realize the first The two extension arms are disconnected from the power-taking column or the power-taking spring. 3. The earth leakage circuit breaker according to claim 1 or 2, characterized in that: the L-pole moving contact operating mechanism includes an L-pole moving contact, a jumper, a L-pole moving contact bracket, a lock spring, a lock and the first extension spring, wherein the moving contact of the L pole is fixedly arranged on the moving contact bracket, the moving contact bracket of the L pole is provided with a long through hole, and a pin shaft is arranged in the long through hole, and the two ends of the pin shaft are arranged On the middle seat and the upper cover, one end of the first extension spring is connected to the L-pole moving contact bracket, and the connection point with the L-pole moving contact bracket is located above the long through hole, and the other end of the first extension spring Fixedly connected to the middle seat or the base, the jumper is hingedly arranged on the upper end of the L-pole moving contact bracket, the jumper is connected to the handle of the handle operating mechanism through the first connecting rod, and the middle part of the locker is set through the The through hole is movably sleeved on the pin shaft, and the locking pin is extended above the lock buckle to cooperate with the jumping buckle to limit the rotation of the jumping buckle. The pushing pin and the reset pin are set under the lock buckle, and the pushing pin is connected to the leakage and short circuit. The push rod of the tripping mechanism is arranged correspondingly, the top end of the reset foot is provided with a spring seat, and the N-pole moving contact operating mechanism includes an N-pole moving contact, a second extension spring, a connecting shaft and a collision pin. The connecting shaft is placed in the long hole above the middle seat, the connecting shaft is connected to the N-pole moving contact and fixedly plugged with the L-pole moving contact bracket, and the middle part of the N-pole moving contact is provided with an arc-shaped contact surface. The interference pin is arranged between the middle seat and the base, and is arranged corresponding to the arc-shaped interference surface. A connection hole or a connecting boss is arranged above the arc-shaped interference surface of the N-pole movable contact, and one end of the second tension spring is connected to the The other end is connected to the middle seat or the base, and the lower end of the N-pole moving contact is a contact point. 4. The earth leakage circuit breaker according to claim 2, characterized in that: the L-pole moving contact operating mechanism includes an L-pole moving contact, a jumper, a L-pole moving contact bracket, a lock spring, a lock and a second A tension spring, wherein the moving contact of the L pole is fixedly arranged on the moving contact bracket, the moving contact bracket of the L pole is provided with a long through hole, and a pin shaft is arranged in the long through hole, and the two ends of the pin shaft are arranged in the middle On the seat and the upper cover, one end of the first tension spring is connected to the L pole moving contact bracket, and the connection point with the L pole moving contact bracket is located above the long through hole, and the other end of the first tension spring is fixedly connected On the middle seat or base, the jumper is hingedly arranged on the upper end of the L-pole moving contact bracket, the jumper is connected with the handle of the handle operating mechanism through the first connecting rod, and the middle part of the locker passes through the set through hole The movable sleeve is set on the pin shaft, and the upper part of the lock is extended with an interference foot that can interfere with the jumper to limit the rotation of the jumper, and the lower part of the lock is provided with a pushing foot and a reset foot. The push rod of the mechanism is arranged correspondingly, the top end of the reset foot is provided with a spring seat, and the N-pole moving contact operating mechanism includes an N-pole moving contact, a second tension spring, a connecting shaft and a collision pin, and the connecting The shaft is placed in the long hole above the middle seat, and the connecting shaft is connected above the N-pole moving contact and the L-pole moving contact bracket. The middle part of the N-pole moving contact is provided with an arc-shaped collision surface, and the collision pin is set Between the middle seat and the base, and corresponding to the arc-shaped contact surface, a connecting hole or a connecting boss is arranged above the arc-shaped contact surface of the N-pole movable contact, and one end of the second tension spring is connected to the connecting hole or the connecting boss. On the platform, the other end is connected to the middle seat or the base, and the lower end of the N-pole movable contact is a contact point; the power-taking column or the power-taking spring is selected from the power-taking spring, and the base is provided with a sleeve protrusion The power-taking spring is sleeved on the socketed boss, the spring coil at the lower end of the power-taking spring is placed close to form a non-elastic end, and the spring coil at the upper end of the power-taking spring is loosened to form an elastic end. The elastic end of the spring is sleeved on the sleeve protrusion, and the upper elastic end of the power-taking spring interferes with the first tension spring to form an electrical connection, and the second extension arm of the torsion spring is correspondingly arranged with the non-elastic end. 5. The earth leakage circuit breaker according to claim 1 or 2, characterized in that: the button is arranged on the base and is located on the side of the handle of the handle operating mechanism, and the button includes a pressing head, a baffle and a resisting foot, wherein the baffle The plate is arranged at the lower end of the pressing head, the button is arranged close to the inner side of the base, one side of the baffle is set flush with one side of the pressing head, and the remaining three sides of the baffle protrude from the corresponding side of the pressing head. The part of the plate that protrudes from the pressing head forms a shielding boss, and the conflicting foot is provided with a card slot, and the first extension arm of the torsion spring is placed in the card slot, and the movable block is provided with a through hole near the lower side, and the movable block The through hole is socketed with the shaft on the base, and the right side of the movable block is set as an arc surface adapted to the handle shaft of the handle operating mechanism. 6. The earth leakage circuit breaker according to claim 2, characterized in that: a first shoulder step is provided at one end of the push rod, and an accommodating cavity is formed between the first shoulder step and the convex rib on the base, and the twist The first extension arm of the spring is in contact with the accommodating cavity, and the hinged swing end of the N pole movable contact of the N pole movable contact operating mechanism is provided with a protrusion, and the protrusion cooperates with the other end of the push rod to push the push rod. The rod slides, the base is provided with a chute, the push rod is placed in the chute, the push rod and located at the hinged swing end of the N-pole moving contact is provided with a second shoulder step, the chute A limited boss is set on it. 7. The earth leakage circuit breaker according to claim 4, characterized in that: a first shoulder step is provided at one end of the push rod, and an accommodating cavity is formed between the first shoulder step and the convex rib on the base, and the twist The first extension arm of the spring is in contact with the accommodating cavity, and the hinged swing end of the N pole movable contact of the N pole movable contact operating mechanism is provided with a protrusion, and the protrusion cooperates with the other end of the push rod to push the push rod. The rod slides, the base is provided with a chute, the push rod is placed in the chute, the push rod and located at the hinged swing end of the N-pole moving contact is provided with a second shoulder step, the chute A limited boss is set on it.