CN220138225U - Drain electrode structure and circuit breaker - Google Patents

Abstract

The utility model relates to the technical field of piezoelectric devices, and particularly discloses a drain electrode structure and a circuit breaker. According to the drain electrode structure provided by the utility model, the release, the first elastic piece and the mutual inductor are respectively welded with the electronic component board, the release, the first elastic piece, the mutual inductor and the electronic component board are integrated together, a modularized design is adopted, a mode of mainly connecting wires in the prior art is replaced, the use of the wires is reduced, the assembly structure of the release, the first elastic piece and the mutual inductor is simplified, the automatic assembly production of the drain electrode structure is facilitated, meanwhile, the integrated module of the release, the first elastic piece, the mutual inductor and the electronic component board can be directly installed, the assembly flow of the circuit breaker is simplified, and the installation is convenient.

Description

Drain electrode structure and circuit breaker

Technical Field

The utility model relates to the technical field of piezoelectric devices, in particular to a drain electrode structure and a circuit breaker.

Background

The low-voltage circuit breaker can be used for distributing electric energy, protecting overload and short circuit of a circuit and power supply equipment, and can also be used for infrequent switching of the circuit and infrequent starting of a motor. With the continuous development of the internet of things technology and the artificial intelligence technology, miniaturization and modularization of circuit breakers have become a trend.

In the prior art, the residual current operated circuit breaker has a complex drain electrode structure, more wires are connected between all the components, the assembly process is complex, and the automatic assembly production is not facilitated.

Therefore, it is desirable to provide a drain electrode structure and a circuit breaker to solve the above technical problems.

Disclosure of Invention

The utility model aims to provide a drain electrode structure and a circuit breaker, which adopt a modularized structure so as to be beneficial to realizing automatic assembly.

To achieve the purpose, the utility model adopts the following technical scheme:

in one aspect, there is provided a drain electrode structure comprising:

the electronic component board is electrically connected with the N-pole wiring board;

the release is welded on the electronic component board and is electrically connected with the electronic component board;

the first elastic piece is welded on the electronic component board, the first end of the first elastic piece is electrically connected with the electronic component board, and the second end of the first elastic piece is electrically connected with the L-pole wiring board;

the mutual inductor is welded on the electronic component board and is electrically connected with the electronic component board, and the mutual inductor is coupled with the L-phase main circuit and the N-phase main circuit;

the release, the first elastic piece, the mutual inductor and the electronic component board form a modularized structure.

As an optional technical scheme of the drain electrode structure, a clamping interface is arranged at the edge of the electronic component board, and the first elastic piece comprises a clamping portion which is clamped in the clamping interface.

As an optional technical scheme of the drain electrode structure, the first elastic element includes a first straight section, a second straight section, a third straight section and a fourth straight section, one end of the first straight section is electrically connected with the electronic component board, the other end of the first straight section is vertically connected with one end of the second straight section, the other end of the second straight section is vertically connected with one end of the third straight section, the other end of the third straight section is vertically connected with the fourth straight section, the fourth straight section is parallel to the second straight section, the length of the first straight section is greater than that of the third straight section, and the fourth straight section is the clamping portion.

As an optional technical scheme of the drain electrode structure, the electronic component board is provided with a first welding hole, and the first straight section is inserted into the first welding hole and welded.

As an optional technical scheme of the drain electrode structure, the drain electrode structure further includes a second elastic member, a first end of the second elastic member is disposed at an interval from a third end of the first elastic member, the first end of the second elastic member can deform to contact with the third end of the first elastic member, and the second end of the second elastic member is electrically connected with the electronic component board.

As an alternative technical scheme of the drain electrode structure, the drain electrode structure further comprises a test button, the test button is slidably arranged, one end of the test button is abutted to the first end of the second elastic piece, and the first end of the second elastic piece can be deformed and contacted with the third end of the first elastic piece by pressing the test button.

As an optional technical scheme of the drain electrode structure, the transformer is provided with a first boss, the electronic component board is provided with a second welding hole, and the first boss is inserted into the second welding hole and welded.

On the other hand, provide a circuit breaker, including casing, L utmost point wiring board, N utmost point wiring board and the drain electrode structure of any one of the above-mentioned, drain electrode structure set up in the casing, the one end of L utmost point wiring board is arranged in the casing and with the second end electricity of first elastic component is connected, the one end of N utmost point wiring board is arranged in the casing and with the electronic component board electricity is connected.

As an optional technical scheme of the circuit breaker, the transformer is provided with a first fixing piece and a second fixing piece, a third fixing piece and a fourth fixing piece are arranged on the inner side of the shell, the third fixing piece is detachably connected with the first fixing piece to limit the axial movement of the transformer, and the fourth fixing piece is detachably connected with the second fixing piece to limit the radial movement of the transformer.

As an optional technical solution of the above circuit breaker, the first fixing member includes a second boss disposed on the transformer, and the third fixing member includes a clamping member disposed on an inner side of the housing, where the clamping member is clamped on the second boss to limit the transformer from moving along an axial direction of the transformer; and/or

The second fixing piece comprises a central hole arranged in the middle of the transformer, the fourth fixing piece comprises a plug-in piece arranged on the inner side of the shell, and the plug-in piece is plugged in the central hole to limit the radial movement of the transformer.

The utility model has the beneficial effects that:

according to the drain electrode structure provided by the utility model, the release, the first elastic piece and the mutual inductor are respectively welded with the electronic component board, the release, the first elastic piece, the mutual inductor and the electronic component board are integrated together, a modularized design is adopted, a mode of mainly connecting wires in the prior art is replaced, the use of the wires is reduced, the assembly structure of the release, the first elastic piece and the mutual inductor is simplified, the automatic assembly production of the drain electrode structure is facilitated, meanwhile, the integrated module of the release, the first elastic piece, the mutual inductor and the electronic component board can be directly installed, the assembly flow of the circuit breaker is simplified, and the installation is convenient.

The circuit breaker provided by the utility model has the advantages that the drain electrode structure is an integrated module, the whole module can be directly installed, the assembly is convenient, the assembly flow of the circuit breaker is simplified, and the automatic assembly production of the circuit breaker is realized.

Drawings

Fig. 1 is a schematic diagram of an internal structure of a circuit breaker according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a portion of a drain electrode structure according to an embodiment of the present utility model;

FIG. 3 is a schematic structural view of a first elastic member according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a transformer according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a housing according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a transformer provided in an embodiment of the present utility model mounted on a housing.

In the figure:

1. a housing; 2. an N-pole wiring board; 3. an L-pole wiring board; 4. an electronic component board; 5. a trip; 6. a first elastic member; 7. a transformer; 8. an L-phase main line; 9. an N-phase main line; 10. a second elastic member; 11. a test button; 12. a clamping piece; 13. a plug-in component; 14. a push plate; 15. an indicator;

41. a card interface; 42. a first welding hole; 43. a second welding hole; 44. a third welding hole; 45. a fourth welding hole; 46. a fifth welding hole;

61. a first straight section; 62. a second straight section; 63. a third straight section; 64. a fourth straight section; 65. a fifth straight section; 66. a first connection section; 67. a second connection section; 68. a sixth straight section;

71. a transformer body; 72. a first boss; 73. a second boss; 74. a first connection end; 75. a second connection end;

101. a bevel panel; 102. a vertical plate; 103. a transverse plate;

131. arc-shaped protruding blocks; 132. a plug block; 133. and (3) connecting ribs.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1 and 2, the present utility model provides a circuit breaker including a case 1, an L-pole wiring board 3, an N-pole wiring board 2, and a drain electrode structure.

The lateral wall of casing 1 has two installation chambeies, and installation chamber intercommunication casing outside and casing 1 inner space, and the main conductor of external circuit can be held to the installation chamber, and in casing 1 was placed respectively to the one end of L utmost point wiring board 3 and the one end of N utmost point wiring board 2, the installation intracavity was placed respectively to the other end of L utmost point wiring board 3 and the other end of N utmost point wiring board 2, and L utmost point wiring board 3 and N utmost point wiring board 2 can be connected with the main conductor is electrically conductive respectively.

The drain electrode structure is arranged in the shell 1 and comprises an electronic component board 4, a release 5, a first elastic piece 6 and a transformer 7. The electronic component board 4 is electrically connected to the N-pole wiring board 2, specifically, the electronic component board 4 is electrically connected to one end of the N-pole wiring board 2 disposed in the housing 1. The release 5 is soldered to the electronic component board 4, and the release 5 is electrically connected to the electronic component board 4. The first elastic member 6 is welded on the electronic component board 4, a first end of the first elastic member 6 is electrically connected with the electronic component board 4, and a second end of the first elastic member 6 is electrically connected with the L-pole wiring board 3. The transformer 7 is soldered to the electronic component board 4, and the transformer 7 is electrically connected to the electronic component board 4, and the transformer 7 is coupled to the L-phase main line 8 and the N-phase main line 9. The release 5, the first elastic member 6, the transformer 7 and the electronic component board 4 constitute a modular structure.

When the transformer 7 in the drain electrode structure detects the leakage fault, the electronic component board 4 controls the ejector rod of the release 5 to act, so that the breaker is opened, and after the ejector rod of the release 5 completes the action, the ejector rod is driven by the reset spring of the release 5 to reset. The first elastic piece 6 takes electricity through the L-pole wiring board 3, and forms a closed loop with the electronic component board 4 and the N-pole wiring board 2 to supply power to the electronic component board 4.

The drain electrode structure that this embodiment provided, release 5, first elastic component 6 and mutual-inductor 7 respectively with the welding of electronic component board 4, with release 5, first elastic component 6, mutual-inductor 7 and electronic component board 4 have integrated together, adopt modular design, the mode of taking the wire connection to be the main place among the prior art has been replaced, the use of wire has been reduced, the packaging structure of release 5 has been simplified, first elastic component 6 and mutual-inductor 7, be favorable to realizing the automatic assembly production of drain electrode structure, also can direct mount release 5 simultaneously, first elastic component 6, mutual-inductor 7 and the integrated module of electronic component board 4, the flow of the equipment of circuit breaker has been simplified, and the installation of being convenient for.

In some embodiments, the release 5 is disposed above the transformer 7 along a horizontal direction, the electronic component board 4 is provided with a third welding hole 44, and a pin on the release 5 is inserted into the third welding hole 44 and is fixed on the electronic component board 4 by welding. The specific structure of the trip unit 5 is the prior art, and will not be described in detail herein.

A push plate 14 and an indicator 15 are correspondingly arranged on one side of the ejector rod of the release 5, when an electric leakage fault occurs, the ejector rod of the release 5 acts to trigger the push plate 14 to rotate, so that the linkage part drives the lock catch to rotate, the operating mechanism is released, and the indicator 15 acts to indicate the electric leakage.

In some embodiments, the edge of the electronic component board 4 is provided with a card interface 41, and the first elastic member 6 includes a clamping portion, where the clamping portion is clamped in the card interface 41. After the first end of the first elastic element 6 is connected with the electronic component board 4, the clamping part is clamped in the clamping interface 41, so that the position of the first elastic element 6 is fixed, and the first end of the first elastic element 6 is conveniently welded on the electronic component board 4 through a wave soldering process.

Alternatively, in order to simplify the structure of the first elastic member 6, the card interface 41 is disposed on a side of the electronic component board 4 close to the L-pole wiring board 3, so that the first elastic member 6 is connected to the L-pole wiring board 3.

The electronic component board 4 is provided with a first welding hole 42, and a first end of the first elastic piece 6 is inserted into the first welding hole 42 and is welded with the electronic component board 4. The first end of the first elastic member 6 is disposed in the first soldering hole 42, so that the soldering strength between the first elastic member 6 and the electronic component board 4 is improved.

In some embodiments, as shown in fig. 2 and 3, the first elastic member 6 includes a first straight section 61, a second straight section 62, a third straight section 63, and a fourth straight section 64, and one end of the first straight section 61 is electrically connected to the electronic component board 4, specifically, one end of the first straight section 61 is plugged into the first soldering hole 42 of the electronic component board 4 and soldered. The other end of the first straight section 61 is vertically connected with one end of the second straight section 62, the other end of the second straight section 62 is vertically connected with one end of the third straight section 63, the other end of the third straight section 63 is vertically connected with the fourth straight section 64, the fourth straight section 64 is parallel to the second straight section 62, the length of the first straight section 61 is larger than that of the third straight section 63, and the fourth straight section 64 is a clamping part. The end of the first straight section 61 away from the second straight section 62 is inserted into the first welding hole 42, and since the fourth straight section 64 needs to be inserted into the card interface 41, the second straight section 62 needs to be parallel to the fourth straight section 64 to ensure that the first straight section 61 is inserted into the first welding hole 42 and the fourth straight section 64 is inserted into the card interface 41.

In some embodiments, the drain electrode structure further includes a second elastic member 10, where a first end of the second elastic member 10 is spaced from a third end of the first elastic member 6, and the first end of the second elastic member 10 is capable of being deformed to contact the third end of the first elastic member 6, and a second end of the second elastic member 10 is electrically connected to the electronic component board 4. The second elastic piece 10 contacts with the first elastic piece 6 to form a leakage test loop, if leakage current is generated in the leakage test loop, the electronic component board 4 controls the release 5 to act after the transformer 7 detects a leakage signal, and the leakage test is completed. The first elastic piece 6 can also be used for taking electricity for the electronic component board 4 while taking electricity for the leakage test loop, so that excessive electricity taking wires are avoided, and the structure is simplified.

On the basis of the structure of the first elastic member 6, the first elastic member 6 further includes a fifth straight section 65, the fifth straight section 65 is connected with the fourth straight section 64 through a first connecting section 66, the first connecting section 66 is obliquely arranged, the fifth straight section 65 is vertically arranged, and one end of the fifth straight section 65 is a third end.

Alternatively, the first straight section 61, the second straight section 62, the third straight section 63, the fourth straight section 64, the first connecting section 66 and the fifth straight section 65 are of a unitary structure, formed in sequence by bending. The first elastic member 6 further has a second end, the second end is connected with the L-pole wiring board 3, the fifth straight section 65 extends and is bent to form a portion parallel to the fifth straight section 65, then is bent to form a second connecting section 67, the second connecting section 67 is obliquely arranged relative to the fifth straight section 65, the second connecting section 62 continues to extend and is bent to form a sixth straight section 68, the sixth straight section 68 is parallel to the fifth straight section 65, and an end portion of the sixth straight section 68 is the second end and is used for being connected with the L-pole wiring board 3.

The L-pole wiring board 3 can be provided with a hole, and the second end of the first elastic piece 6 is inserted into the hole and fixed in a welding mode.

In some embodiments, the second elastic member 10 includes an integrally connected inclined plate 101, a vertical plate 102 and a transverse plate 103, where the end of the inclined plate 101 is a first end and is spaced from the first elastic member 6, specifically, according to the structure of the first elastic member 6 described above, the end of the inclined plate 101 is spaced from the fifth flat section 65, and the inclined plate 101 can deform to be in contact with the fifth flat section 65. The vertical board 102 is electrically connected to the electronic component board 4 through wires.

In order to enable the first end of the second elastic member 10 to deform, in some embodiments, the drain electrode structure further includes a test button 11, the test button 11 is slidably disposed, one end of the test button 11 abuts against the first end of the second elastic member 10, and the first end of the second elastic member 10 can be deformed and contacted with the third end of the first elastic member 6 by pressing the test button 11, so that the manual operation is convenient for performing the leakage detection.

Further, the casing 1 is provided with a mounting hole, one end of the test button 11 is inserted through the mounting hole and is arranged in the casing 1, the test button 11 is in sliding connection with the casing 1, and the first end of the second elastic piece 10 can be deformed by pressing the test button 11.

In some embodiments, as shown in fig. 2 and 4, the transformer 7 is provided with a first boss 72, the electronic component board 4 is provided with a second welding hole 43, the first boss 72 is inserted into the second welding hole 43 and is welded with the electronic component board 4, and the first boss 72 is provided to prevent the connection between the transformer 7 and the electronic component board 4 from being unreliable due to the stress of the welding part of the transformer 7 and the electronic component board 4.

Further, the transformer 7 includes a transformer body 71, a first boss 72 is disposed on a circumferential side wall of the transformer body 71, one end of the first boss 72 protrudes from a surface of the transformer body 71 to be inserted into the second welding hole 43, and after the first boss 72 is inserted into the electronic component board 4, a side surface of the transformer body 71 can be attached to the electronic component board 4.

Alternatively, 1, 2, 3 or more first bosses 72 may be provided, and may be provided according to the size of the transformer 7, so as to improve the connection strength of the transformer 7 and the electronic component board 4.

The transformer 7 is further provided with a first connection end 74 and a second connection end 75, and specifically, the first connection end 74 and the second connection end 75 are disposed on a circumferential side wall of the transformer body 71. The electronic component board 4 is provided with a fourth welding hole 45 and a fifth welding hole 46, the first connecting end 74 is inserted into the fourth welding hole 45, the second connecting end 75 is inserted into the fifth welding hole 46, the first connecting end 74 is welded into the fourth welding hole 45 in a welding mode, and the second connecting end 75 is welded into the fifth welding hole 46, so that the mutual inductor 7 and the electronic component board 4 are electrically connected.

After the transformer 7, the first elastic member 6 and the release 5 are fixed to the electronic component board 4, respectively, the integrated module needs to be mounted in the case 1 of the circuit breaker. In some embodiments, referring to fig. 4, 5 and 6, the transformer 7 is provided with a first fixing member and a second fixing member, the inner side of the casing 1 is provided with a third fixing member and a fourth fixing member, the third fixing member is detachably connected with the first fixing member to limit the axial movement of the transformer 7, and the fourth fixing member is detachably connected with the second fixing member to limit the radial movement of the transformer 7. The mutual inductor 7 is connected with the third fixing piece and the fourth fixing piece on the inner side of the shell 1 through the first fixing piece and the second fixing piece so as to respectively limit the mutual inductor 7 to move along the axial direction and the radial direction of the mutual inductor 7, and the mutual inductor 7 is fixed on the shell 1, and because the electronic component board 4 is connected with the mutual inductor 7, the electronic component board 4 can be effectively prevented from being displaced when the circuit breaker is assembled, and the fixing of the position of the electronic component board 4 is realized.

The first fixing piece comprises a second boss 73 arranged on the transformer 7, the third fixing piece comprises a clamping piece 12 arranged on the inner side of the shell 1, and the clamping piece 12 is clamped on the second boss 73 to limit the axial movement of the transformer 7 so as to fix the transformer 71 on the shell 1 and prevent the electronic component board 4 from displacing. Further, the second boss 73 is disposed on a circumferential side wall of the transformer body 71, and the clamping member 12 is clamped on the second boss 73 to enable the transformer body 71 to be attached to an inner side surface of the housing 1.

Optionally, the clamping piece 12 includes the clamping plate, and the one end and the casing 1 of clamping plate are connected, and the other end of clamping plate is equipped with the buckle, and the clamping plate has certain elasticity, and when installing transformer 7, transformer 7 can extrude the buckle and make the clamping plate produce elastic deformation, provide for second boss 73 and dodge the space, until transformer 7 installs in place, and the buckle butt is in one side that second boss 73 deviates from casing 1, restriction transformer 7 moves along its axial direction.

The number of the clamping members is matched with the number of the second bosses 73, and may be 1 or more according to the installation requirement, which is not particularly limited herein.

In some embodiments, the middle of the transformer 7 is provided with a central hole, in particular a central hole provided in the middle of the transformer body 71. The second mounting includes the centre bore, and the fourth mounting is including setting up in the inboard plug connector 13 of casing 1, and plug connector 13 pegging graft in the centre bore in order to restrict mutual-inductor 7 along its axial displacement, can effectively prevent at the in-process of equipment circuit breaker, and electronic component board 4 takes place the displacement and influences the stability that electronic component board 4 and other parts are connected.

Optionally, the plug connector 13 includes a step-shaped arc-shaped protruding block 131, one end of the arc-shaped protruding block 131 is connected with the casing 1, a plurality of plug-in blocks 132 are arranged on the step surface of the arc-shaped protruding block 131 in a protruding way, the plug-in blocks 132 are higher than the surface of the arc-shaped protruding block 131 opposite to the casing 1, the plug-in blocks 132 are plugged in the central hole of the transformer 7, the plug-in blocks 132 are abutted to the hole wall of the central hole, and the surface of the arc-shaped protruding block 131 opposite to the casing 1 is used for supporting the transformer 7.

Further, a plurality of connecting ribs 133 are radially arranged on the outer side wall of the arc-shaped protruding block 131, and the connecting ribs 133 connect the arc-shaped protruding block 131 with the shell 1, so that the connection strength of the arc-shaped protruding block 131 and the shell 1 is improved.

The drain electrode structure in the circuit breaker is an integrated module, and the whole module can be directly installed, so that the circuit breaker is convenient to assemble, the assembling flow of the circuit breaker is simplified, and the automatic assembly production of the circuit breaker is facilitated.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The drain electrode structure is characterized by comprising:

an electronic component board (4), wherein the electronic component board (4) is electrically connected with the N-pole wiring board (2);

the release (5) is welded on the electronic component board (4), and the release (5) is electrically connected with the electronic component board (4);

the first elastic piece (6) is welded on the electronic component board (4), a first end of the first elastic piece (6) is electrically connected with the electronic component board (4), and a second end of the first elastic piece (6) is electrically connected with the L-pole wiring board (3);

a mutual inductor (7) welded on the electronic component board (4), wherein the mutual inductor (7) is electrically connected with the electronic component board (4), and the mutual inductor (7) is coupled with an L-phase main circuit (8) and an N-phase main circuit (9);

the release (5), the first elastic piece (6), the mutual inductor (7) and the electronic component board (4) form a modularized structure.

2. The drain electrode structure according to claim 1, wherein the edge of the electronic component board (4) is provided with a clamping interface (41), and the first elastic member (6) includes a clamping portion, and the clamping portion is clamped in the clamping interface (41).

3. The drain electrode structure according to claim 2, wherein the first elastic member (6) includes a first straight section (61), a second straight section (62), a third straight section (63) and a fourth straight section (64), one end of the first straight section (61) is electrically connected with the electronic component board (4), the other end of the first straight section (61) is vertically connected with one end of the second straight section (62), the other end of the second straight section (62) is vertically connected with one end of the third straight section (63), the other end of the third straight section (63) is vertically connected with a fourth straight section (64), the fourth straight section (64) is parallel with the second straight section (62), the length of the first straight section (61) is longer than the length of the third straight section (63), and the fourth straight section (64) is the engagement portion.

4. A drain electrode structure according to claim 3, wherein the electronic component board (4) is provided with a first soldering hole (42), and the first straight section (61) is inserted into the first soldering hole (42) and soldered.

5. The drain electrode structure according to claim 1, further comprising a second elastic member (10), wherein a first end of the second elastic member (10) is spaced from a third end of the first elastic member (6), and wherein the first end of the second elastic member (10) is deformable to be in contact with the third end of the first elastic member (6), and wherein a second end of the second elastic member (10) is electrically connected to the electronic component board (4).

6. The drain electrode structure according to claim 5, further comprising a test button (11), wherein the test button (11) is slidably disposed, one end of the test button (11) abuts against the first end of the second elastic member (10), and the first end of the second elastic member (10) is deformed and contacts the third end of the first elastic member (6) by pressing the test button (11).

7. The drain electrode structure according to claim 1, wherein a first boss (72) is provided on the transformer (7), a second welding hole (43) is provided on the electronic component board (4), and the first boss (72) is inserted into the second welding hole (43) and welded.

8. The circuit breaker, its characterized in that includes casing (1), L utmost point wiring board (3), N utmost point wiring board (2) and the drain electrode structure of any one of claims 1-7, drain electrode structure set up in casing (1), the one end of L utmost point wiring board (3) is arranged in casing (1) and with the second end electricity of first elastic component (6) is connected, the one end of N utmost point wiring board (2) is arranged in casing (1) and with electronics package board (4) electricity is connected.

9. The circuit breaker according to claim 8, characterized in that the transformer (7) is provided with a first fixing member and a second fixing member, the inner side of the housing (1) is provided with a third fixing member and a fourth fixing member, the third fixing member is detachably connected with the first fixing member to limit the axial movement of the transformer (7) along the same, and the fourth fixing member is detachably connected with the second fixing member to limit the radial movement of the transformer (7) along the same.

10. The circuit breaker according to claim 9, wherein,

the first fixing piece comprises a second boss (73) arranged on the transformer (7), the third fixing piece comprises a clamping piece (12) arranged on the inner side of the shell (1), and the clamping piece (12) is clamped on the second boss (73) to limit the transformer (7) to move along the axial direction of the transformer; and/or

The second fixing piece comprises a central hole arranged in the middle of the transformer (7), the fourth fixing piece comprises a plug connector (13) arranged on the inner side of the shell (1), and the plug connector (13) is plugged in the central hole to limit the transformer (7) to move radially along the central hole.