CN219917038U - Circuit breaker - Google Patents

Abstract

The utility model provides a circuit breaker for be connected with connecting device, the circuit breaker includes the casing, be equipped with the signal board in the casing, be equipped with in the casing and be used for holding connecting device's spread groove, the signal board includes the link of being connected with the control circuit board, and is used for inserting into insert the end in the spread groove, be equipped with public contact on the insert end, connecting device includes the device casing, be equipped with on the device casing and be used for the cover insert the slot on the end, be equipped with the female contact that is used for with public contact in the slot, the device casing can insert in the spread groove and overlap and make public contact and female contact on the insert end of signal board, not only can realize the guard action to the signal board, prevent that the signal board from being corroded and oxidized by external environment, be equipped with the spread groove that holds connecting device in the casing moreover, connecting device's device casing can insert in the spread groove, ensures the reliability that circuit breaker and connecting device are connected.

Description

Circuit breaker

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a circuit breaker.

Background

The circuit breaker is commonly used for controlling the on-off of a circuit and plays a certain protection role at the same time. The circuit breaker may be inserted into a signal terminal so that a main circuit inside the circuit breaker is connected to the outside through the signal terminal. However, the existing signal terminals are exposed to the external environment, and the signal terminals and the portions of the circuit breaker main circuit for connecting the signal terminals are corroded and oxidized by the external environment, resulting in a reduction in service life. In addition, the connection mode of the existing circuit breaker and the signal terminal is unreasonable, so that not only is the internal layout space of the circuit breaker wasted, but also the electrical clearance is insufficient, and the safety is reduced.

Disclosure of Invention

The object of the present utility model is to overcome at least one of the drawbacks of the prior art and to provide a circuit breaker.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a circuit breaker for be connected with connecting device, the circuit breaker includes the casing, be equipped with the signal board in the casing, be equipped with in the casing and be used for holding connecting device's spread groove, the signal board includes the link of being connected with the control circuit board, and is used for inserting to insert the end in the spread groove, be equipped with public contact on the end of inserting, connecting device includes the device casing, be equipped with on the device casing and be used for the cover slot on the end of inserting, be equipped with the female contact that is used for with public contact in the slot, the device casing can insert in the spread groove and overlap and make public contact and female contact on the end of inserting of signal board.

Preferably, the signal board includes two public mating surfaces of relative setting in both sides, and two public mating surfaces are first public mating surface and the public mating surface of second respectively, and first public mating surface is equipped with public contact, and the public mating surface of second is equipped with first face of dodging, the projection face and the first face coincidence of dodging of public contact on the public mating surface of second, the slot include with first public mating surface and the public mating surface of second set up respectively first female mating surface and the female mating surface of second relatively, first female mating surface be equipped with public contact complex female contact, the female mating surface of second is equipped with first face complex second of dodging.

Preferably, the first male mating surface is provided with a plurality of male contacts, the second male mating surface is not provided with male contacts and forms the first avoidance surface, and the second female mating surface corresponding to the second male mating surface is not provided with female contacts to form the second avoidance surface.

Preferably, the first male mating surface and the first female mating surface are arranged at intervals, a gap is formed between the first male mating surface and the first female mating surface, the male contact is in contact fit with the female contact, the male contact and the female contact are respectively arranged on the first male mating surface and the first female mating surface in a protruding mode, and the second avoidance surface is in contact fit with the first avoidance surface.

Preferably, the first male mating surface and the second male mating surface are respectively provided with a plurality of male contacts, the first avoidance surface is respectively arranged between two adjacent male contacts on the first male mating surface and the second male mating surface, and the male contacts on the first male mating surface are dislocated with the male contacts on the second male mating surface and correspond to the first avoidance surface on the second male mating surface.

Preferably, the male contact is in contact fit with the female contact, the male contact and the female contact are respectively arranged on the male matching surface and the female matching surface in a protruding mode, the second avoidance surface is arranged at intervals with the first avoidance surface, and a gap is formed between the second avoidance surface and the first avoidance surface.

Preferably, one end of the shell is provided with a wire inlet mechanism, the wire inlet mechanism comprises two wiring terminals, the connecting groove is formed between the two wiring terminals, the signal board is arranged in the connecting groove, and a gap is formed between the signal board and the connecting groove.

Preferably, gaps are formed between at least three side walls of the peripheral side walls of the signal board and the connecting grooves.

Preferably, three side walls of the periphery of the signal board are provided with gaps with the connecting grooves, a gap with a U-shaped section is formed, and the cross section of the slot of the device shell is also U-shaped.

Preferably, the housing is provided with a guiding inclined surface at the inlet of the connecting slot for guiding the connecting device into the connecting slot in cooperation with the device housing when the connecting device is inserted.

Preferably, the shell is provided with a first positioning structure in the connecting groove, the outer side wall of the device shell is provided with a second positioning mechanism, and when the connecting device is inserted into the connecting groove, the first positioning structure is in limit fit with the second positioning mechanism.

Preferably, the housing includes a lower half shell and an upper half shell disposed opposite to each other, and the connection groove is disposed on the lower half shell.

Preferably, the shell is provided with a wire outlet end, an overload protection mechanism, an operating mechanism, an arc extinguishing device, a short-circuit protection device, a current detection device, a signal sampling device, a control circuit board, a wire inlet mechanism and a wire outlet mechanism, wherein the signal board is connected with the control circuit board, the wire inlet mechanism and the wire outlet mechanism are respectively arranged at two ends of the shell, one end provided with the wire outlet mechanism is also provided with a button device or a handle connected with the operating mechanism, and the protection mechanism and the operating mechanism are matched to trigger the tripping of the circuit breaker.

Preferably, the device further comprises an electric operating mechanism, the operating mechanism is arranged in the middle of the shell, the arc extinguishing device and the protection mechanism are arranged between the operating mechanism and the wire inlet mechanism side by side, and the current sampling device is arranged between the short-circuit protection device and the wire inlet mechanism.

The circuit breaker of this embodiment is through setting up signal board and connecting device components of a whole that can function independently to set up the signal board in the casing of circuit breaker, not only can realize the guard action to the signal board, prevent that the signal board from being corroded and oxidized by external environment, can effectively prolong the life of circuit breaker, be equipped with the spread groove that holds connecting device in the casing moreover, connecting device's device casing can insert in the spread groove, ensures the reliability that circuit breaker and connecting device are connected.

In addition, set up the public contact of dislocation in the both sides of signal board to and the first face of dodging of dislocation, the signal board only when one side sets up public contact, not only can reduce the contact quantity through first face of dodging, and then reduce cost, when the signal board both sides all set up public contact moreover, can also increase the electric gap between the public contact through first face of dodging, improve the security, can prevent connecting device and signal board cartridge assembly and make progress in the time of the dress in addition.

In addition, a plurality of male contacts are respectively arranged on the first male matching surface and the second male matching surface, the first avoiding surface is respectively arranged between two adjacent male contacts on each side of the male matching surface, the projection surfaces of the male contacts on the two sides of the male matching surface on the other side are respectively arranged in a dislocation mode with the male contacts on the male matching surface on the projection side. The first avoidance surface not only can increase the electric gap between the male contacts at two sides, but also can ensure enough number of the male contacts on the basis of compact structure.

Drawings

Fig. 1 is an external schematic view of a circuit breaker of the present embodiment, showing at least the relative positions of the circuit breaker wire inlet mechanism and the signal board;

fig. 2 is a schematic diagram of the internal structure of the incoming line end of the circuit breaker of this embodiment, showing the relative positions of the signal board, the control circuit board and the housing;

FIG. 3 is a schematic view of the mechanism of each mechanism device in the circuit breaker according to the embodiment, wherein the circuit breaker is in a breaking state, and at least the relative positions of the operating mechanism, the overload protection device, the short-circuit protection device and the current signal sampling device are shown;

fig. 4 is a schematic view of the internal structure of the back of the circuit breaker according to the present embodiment, at least showing the internal control circuit board and the housing;

FIG. 5 is a schematic illustration of the plugging of a signal board to a connector device of the present utility model;

fig. 6 is a distribution of female contacts in a first embodiment;

fig. 7 is a position of the male contact distribution in the first embodiment;

fig. 8 is a female contact distribution position in the second embodiment;

fig. 9 is a position of the male contact distribution in the second embodiment;

fig. 10 is a female contact distribution position in a third embodiment;

FIG. 11 is a third embodiment of a male contact distribution position;

fig. 12 is another embodiment of the circuit breaker with the connection device disposed within the housing;

in the figure, 1, a shell; 2. a connecting device; 20. a slot; 3. a signal board; 301. a connection end; 302. an insertion end; 31. a male mating surface; 32. a male contact; 33. a first relief surface; 21. a female mating surface; 22. a female contact; 23. a second relief surface; 11. a button device; 12. an electric operating mechanism; 13. overload protection mechanism; 14. an operating mechanism; 15. arc extinguishing device; 16. a short circuit protection device; 17. a current detection device; 18. a signal sampling device; 19. a control circuit board; 10. a wire outlet mechanism; 4. a connection terminal; 101. a lower half shell; 102. an upper half shell; 320. a first end face; 30. a second end face.

Detailed Description

Embodiments of the circuit breaker of the present utility model are further described below with reference to the examples shown in the drawings. The circuit breaker of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1 to 5, the circuit breaker of the present embodiment is configured to be connected to a connection device 2, the circuit breaker includes a housing 1, a signal board 3 is provided in the housing 1, a connection slot 200 configured to accommodate the connection device 2 is provided in the housing 1, the signal board 3 includes a connection end 301 connected to a control circuit board 19, and an insertion end 302 configured to be inserted into the connection slot 200, a male contact 32 is provided on the insertion end 302, the connection device 2 includes a device housing provided with a slot 20 configured to be sleeved on the insertion end 302, a female contact 22 configured to be in contact with the male contact 32 is provided in the slot 20, and the device housing is configured to be inserted into the connection slot 200 and sleeved on the insertion end 302 of the signal board 3 so that the male contact 32 is in contact with the female contact 22.

The circuit breaker of this embodiment through setting up signal board 3 and connecting device 2 components of a whole that can function independently to set up signal board 3 in the casing 1 of circuit breaker, not only can realize the guard action to signal board 3, prevent that signal board 3 from being corroded and oxidation by external environment, can effectively prolong the life of circuit breaker, be equipped with the spread groove 200 that holds connecting device 2 in casing 1 moreover, connecting device's device casing can insert in the spread groove 200, ensures the reliability that circuit breaker and connecting device 2 are connected.

As shown in fig. 1-5, the circuit breaker of this embodiment further includes a button device 11, an electrical operating mechanism 12, an overload protection mechanism 13, an operating mechanism 14, an arc extinguishing device 15, a short-circuit protection device 16, a current detection device 17, a signal sampling device 18, a control circuit board 19, a wire inlet mechanism and a wire outlet mechanism 10, wherein the signal board 3 is connected with the control circuit board 19, the wire inlet mechanism and the wire outlet mechanism 10 are respectively arranged at two ends of the housing 1, one end provided with the wire outlet mechanism 10 is further provided with the button device 11 connected with the operating mechanism 14, the operating mechanism 14 is arranged in the middle of the housing 1, the button device 11 controls the circuit breaker to be opened and closed through the operating mechanism 14, the electrical operating mechanism 12 drives the circuit breaker to be opened and closed through the button device 11 or the operating mechanism 14, the protection mechanism cooperates with the operating mechanism 14 to trigger the circuit breaker to trip, the arc extinguishing device 15 and the protection mechanism are arranged between the operating mechanism 14 and the wire inlet mechanism side by side, the current sampling device is arranged between the short-circuit protection device 16 and the wire inlet mechanism, and the signal board 3 is provided with a signal transmission PIN, and the signal collection PIN can be realized through the PIN to the signal collection system in the circuit breaker 19. As a further embodiment, the button device 11 may be replaced by a swinging handle.

As shown in fig. 1-2, the wire inlet mechanism is arranged at one end of the housing 1, the wire inlet mechanism comprises two wire connecting terminals 4, and the signal board 3 is arranged between the two wire connecting terminals 4. The two wiring terminals 4 are clamping wiring terminals, and the busbar can be inserted into the wiring terminals 4 for connection. A connection groove 200 is provided between the two connection terminals 4, the signal board 3 is provided in the connection groove 200, and a gap is provided between the signal board 3 and the connection groove 200 for insertion of the connection device 2. The signal board 3 comprises a connecting end 301 connected with the control circuit board 19 and an inserting end 302 inserted into the connecting groove 200, the whole signal board 3 is located in the shell 1, the connecting end 301 is provided with a PIN PIN and is electrically connected with the control circuit board 19, and at least one side of the inserting end 302 is provided with a male contact 32.

As shown in fig. 5, the connection device 2 includes a device housing provided with a slot 20 for fitting over an insertion end 302 of the signal board 3, at least one side of the slot 20 being provided with a female contact 22 for contacting the male contact 32, and the device housing being capable of being inserted into the connection slot 200 and fitted over the insertion end 302 of the signal board 3 to bring the male contact 32 into contact with the female contact 22. The device housing is provided with a conductive member, the conductive member is provided with a protrusion, the female contact 22 extends into the slot 20, and preferably, the female contact 22 may have a certain elasticity.

The circuit breaker of the present embodiment is provided with the connection groove 200 accommodating the connection device 2, and the device housing of the connection device can be inserted into the connection groove 200, ensuring the reliability of the connection of the circuit breaker with the connection device 2. Preferably, at least three side walls of the peripheral side walls of the signal board 3 have gaps with the connection groove 200. One embodiment is that the peripheral side walls of the signal board 3 have a gap with the connecting slot 200, into which the device housing of the connecting device 2 is inserted, and the slot 20 surrounds the peripheral side walls of the signal board 3. Preferably, three side walls of the peripheral side walls of the signal board 3 and the connecting groove 200 have gaps, so that a gap with a U-shaped section is formed, the section of the slot 20 of the device shell is also U-shaped, the device shell of the connecting device 2 is inserted into the gap, and the slot 20 surrounds the three peripheral side walls of the signal board 3, so that the adapting degree of the plugging fit is improved.

Preferably, the casing 1 is provided with a guiding inclined plane at the entrance of the connecting slot 200, and is used for guiding the connecting device 2 into the connecting slot 200 by matching with the casing of the device when the connecting device 2 is inserted into the connecting slot 200, and the casing of the device is used for adjusting the position by matching with the guiding inclined plane under stress, so that the signal board 3 is not stressed, the damage of the signal board 3 can be protected, and the service life is prolonged. Preferably, the housing 1 is provided with a first positioning structure in the connecting slot 200, the outer side wall of the housing is provided with a second positioning mechanism, and when the connecting device 2 is inserted into the connecting slot 200, the first positioning structure is in limit fit with the second positioning mechanism.

Further, the housing 1 includes a lower half shell 101 and an upper half shell 102 disposed opposite to each other, the signal board 3 is disposed on the lower half shell 101, and a connection groove 200 for receiving the connection device 2 is provided in the lower half shell 101.

As shown in two embodiments of fig. 6-7 and 8-9, the signal board 3 of the circuit breaker comprises two male mating surfaces arranged opposite to each other on both sides, wherein at least one male mating surface is provided with a male contact 32 and at least one male mating surface is provided with a first relief surface 33; the two male mating surfaces are a first male mating surface 311 and a second male mating surface 312 respectively, the first male mating surface 311 is provided with a male contact 32, the second male mating surface 312 is provided with a first avoidance surface 33, a projection surface of the male contact 32 on the second male mating surface 312 coincides with the first avoidance surface 33, the slot 20 comprises two female mating surfaces 21 which are respectively opposite to the first male mating surface 311 and the second male mating surface 312, the two female mating surfaces 21 are respectively a first female mating surface and a second female mating surface, the first female mating surface is provided with a female contact 22 matched with the male contact 32, the second female mating surface is provided with a second avoidance surface 23 matched with the first avoidance surface 33, and when the male contact 32 contacts with the corresponding female contact 22, the second avoidance surface 23 is opposite to the corresponding first avoidance surface 33.

In the circuit breaker of this embodiment, the two sides of the signal board 3 are provided with the dislocated male contacts 32 and the dislocated first avoidance surfaces 33, when the signal board 3 is provided with the male contacts 32 on one side only, the structure can be simplified, the cost can be reduced, and when the two sides of the signal board 3 are provided with the male contacts 32, the electrical gap between the male contacts 32 can be increased through the first avoidance surfaces 33, so that the safety is improved. It will be appreciated that when the male contacts 32 are disposed on both sides of the signal board 3, the first avoidance surface 33 may also serve to reduce the number of contacts and reduce the cost, which will be described in detail below with reference to the embodiments.

As shown in fig. 6-7, in the first embodiment, the first male mating surface 311 is provided with a plurality of male contacts 32, and the second male mating surface 312 is not provided with a male contact 32 and forms the first avoidance surface 33. That is, the second male mating surface 312 is integrally formed with the first avoiding surface 33, and only the male contact 32 is provided on one side, which not only simplifies the structure and reduces the cost, but also prevents the reverse assembly of the connector 2 and the signal board 3.

Further, the first male mating surface 311 is disposed at an interval from the first female mating surface, a gap is provided between the first male mating surface 311 and the first female mating surface, the male contact 32 is in contact fit with the female contact 22, and the male contacts are respectively disposed on the first male mating surface 311 and the first female mating surface in a protruding manner, wherein the second female mating surface corresponding to the second male mating surface 312 is not provided with the female contact 22 to form the second avoidance surface 23, and the second avoidance surface 23 is in contact fit with the first avoidance surface 33. The present embodiment provides 5 pairs of male contacts 32 and female contacts 22, and other numbers may be selected without specific limitation herein.

As shown in fig. 8-9, in the second embodiment, a plurality of male contacts 32 are respectively disposed on the first male mating surface 311 and the second male mating surface 312, the first avoiding surface 33 is respectively disposed between two adjacent male contacts 32 on the first male mating surface 311 and the second male mating surface 312, and the male contacts 32 on the first male mating surface 311 are dislocated with the male contacts 32 on the second male mating surface 312 and correspond to the first avoiding surfaces 33 on the second male mating surface 312. The male contacts 32 on the male mating surfaces on two sides are arranged in a staggered manner, the electric gap between the male contacts 32 on two sides can be increased through the first avoiding surface 33, the number of the male contacts 32 is enough on the basis of compact structure, and the connector 2 and the signal board 3 can be prevented from being reversely assembled in a plug-in manner.

Further, when the connecting device 2 and the signal board 3 of this embodiment are matched, the male contact 32 is in contact with the female contact 22, and is respectively and convexly arranged on the male mating surface and the female mating surface 21, the second avoidance surface 23 is arranged at intervals with the first avoidance surface 33, and a gap is arranged between the second avoidance surface 23 and the first avoidance surface 33.

Further, the number of the male contacts 32 on the two sides of the male mating surface is equal, or the difference between the numbers of the male contacts 32 on the two sides of the male mating surface is one, in this embodiment, two male contacts 32 are disposed on one side of the male mating surface, and three male contacts 32 are disposed on the other male mating surface, so that the space can be fully utilized, and a greater number of the male contacts 32 can be disposed as much as possible.

Further, the length of the male contact 32 is equal to that of the signal board 3, and two first end surfaces 320 at two ends of the male contact 32 are respectively flush with two second end surfaces 30 at two ends of the signal board 3. By making the length of the male contact 32 equal to the length of the signal board 3, the male contact 32 can be aligned and connected with the female contact 22 easily, reducing difficulty in mounting.

As shown in fig. 10-11, in the third embodiment, a plurality of male contacts 32 are respectively disposed on the first male mating surface 311 and the second male mating surface 312, the male contacts 32 on the first male mating surface 311 and the second male mating surface 312 are correspondingly disposed, the first avoiding surface 33 is respectively disposed between two adjacent male contacts 32 on the first male mating surface 311 and the second male mating surface 312, and the first male mating surface 311 and the second male mating surface 312 are correspondingly disposed.

The connecting device 2 can be a stand-alone device or can be installed in a cabinet.

As a further example, as shown in fig. 12, the connection device 2 is arranged in the housing 1 of the circuit breaker, so that the connection device 2 is a part of the circuit breaker, and the signal board 3 is used to be inserted into the slot 20 of the connection device 2, so that the male contact 32 is contacted with the female contact 22 on the insertion end 302. Of course, the signal board 3 of this solution is only matched with the slot 20 of the connecting device 2, which is easy to deviate and damage, and the connection is not firm enough.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (14)

1. A circuit breaker for connection with a connection device (2), the circuit breaker comprising a housing (1), characterized in that: be equipped with signal board (3) in casing (1), be equipped with in casing (1) be used for holding spread groove (200) of connecting device (2), signal board (3) include link (301) be connected with control circuit board (19), and be used for inserting into insert end (302) in spread groove (200), be equipped with public contact (32) on insert end (302), connecting device (2) include the device casing, be equipped with on the device casing be used for the cover insert slot (20) on end (302), be equipped with in slot (20) be used for with female contact (22) of public contact (32) contact, device casing can insert in spread groove (200) and cover make public contact (32) and female contact (22) contact on insert end (302) of signal board (3).

2. The circuit breaker according to claim 1, characterized in that: the signal board (3) comprises two male matching surfaces which are oppositely arranged on two sides, the two male matching surfaces are a first male matching surface (311) and a second male matching surface (312) respectively, the first male matching surface (311) is provided with a male contact (32), the second male matching surface (312) is provided with a first avoidance surface (33), the projection surface of the male contact (32) on the second male matching surface (312) coincides with the first avoidance surface (33), the slot (20) comprises a first female matching surface and a second female matching surface which are oppositely arranged respectively with the first male matching surface (311) and the second male matching surface (312), the first female matching surface is provided with a female contact (22) matched with the male contact (32), and the second female matching surface is provided with a second avoidance surface (23) matched with the first avoidance surface (33).

3. The circuit breaker according to claim 2, characterized in that: the first male matching surface (311) is provided with a plurality of male contacts (32), the second male matching surface (312) is not provided with the male contacts (32) and forms the first avoidance surface (33), and the second female matching surface corresponding to the second male matching surface (312) is not provided with the female contacts (22) to form the second avoidance surface (23).

4. A circuit breaker according to claim 3, characterized in that: the first male mating surface (311) is arranged at intervals with the first female mating surface, a gap is arranged between the first male mating surface (311) and the first female mating surface, the male contact (32) is in contact fit with the female contact (22), the first male mating surface (311) and the first female mating surface are respectively arranged in a protruding mode, and the second avoidance surface (23) is in contact fit with the first avoidance surface (33).

5. The circuit breaker according to claim 2, characterized in that: the first male mating surface (311) and the second male mating surface (312) are respectively provided with a plurality of male contacts (32), the first avoidance surface (33) is respectively arranged between two adjacent male contacts (32) on the first male mating surface (311) and the second male mating surface (312), and the male contacts (32) on the first male mating surface (311) and the male contacts (32) on the second male mating surface (312) are staggered and correspond to the first avoidance surface (33) on the second male mating surface (312).

6. The circuit breaker of claim 5, wherein: the male contact (32) is in contact fit with the female contact (22), the male contact and the female contact are respectively arranged on the male fit surface and the female fit surface in a protruding mode, the second avoidance surface (23) and the first avoidance surface (33) are arranged at intervals, and a gap is formed between the second avoidance surface (23) and the first avoidance surface (33).

7. The circuit breaker according to claim 1, characterized in that: one end of the shell (1) is provided with a wire inlet mechanism, the wire inlet mechanism comprises two wiring terminals (4), a connecting groove (200) is formed between the two wiring terminals (4), the signal board (3) is arranged in the connecting groove (200), and a gap is formed between the signal board (3) and the connecting groove (200).

8. The circuit breaker of claim 7, wherein: gaps are formed between at least three side walls of the peripheral side walls of the signal plate (3) and the connecting grooves (200).

9. The circuit breaker of claim 8, wherein: three side walls of the periphery of the signal board (3) are provided with gaps with the connecting grooves (200), the gaps with the U-shaped cross sections are formed, and the cross sections of the slots (20) of the device shell are also U-shaped.

10. The circuit breaker according to claim 1, characterized in that: the shell (1) is provided with a guiding inclined plane at the inlet of the connecting groove (200) and is used for guiding the connecting device (2) into the connecting groove (200) by being matched with the device shell when the connecting device (2) is inserted.

11. The circuit breaker according to claim 1, characterized in that: the shell (1) is provided with a first positioning structure in the connecting groove (200), the outer side wall of the device shell is provided with a second positioning mechanism, and when the connecting device (2) is inserted into the connecting groove (200), the first positioning structure is in limit fit with the second positioning mechanism.

12. The circuit breaker according to claim 1, characterized in that: the shell (1) comprises a lower half shell (101) and an upper half shell (102) which are oppositely arranged, and the connecting groove (200) is arranged on the lower half shell (101).

13. The circuit breaker according to claim 1, characterized in that: be equipped with wire outlet end, overload protection mechanism (13), operating device (14), arc extinguishing device (15), short-circuit protection device (16), current detection device (17), signal sampling device (18), control circuit board (19), inlet wire mechanism and mechanism (10) of being qualified for the next round of competitions in casing (1), signal board (3) are connected with control circuit board (19), inlet wire mechanism and mechanism (10) of being qualified for the next round of competitions set up respectively at the both ends of casing (1), are equipped with the button device (11) or the handle that mechanism (10) of being qualified for the next round of competitions still are equipped with in operating device (14) connection, protection mechanism and operating device (14) cooperation trigger circuit breaker tripping.

14. The circuit breaker of claim 13, wherein: the electric arc extinguishing device is characterized by further comprising an electric operating mechanism (12), wherein the operating mechanism (14) is arranged in the middle of the shell (1), the arc extinguishing device (15) and the protection mechanism are arranged between the operating mechanism (14) and the wire inlet mechanism side by side, and the current sampling device is arranged between the short circuit protection device (16) and the wire inlet mechanism.