Circuit breaker

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to a circuit breaker. The circuit breaker provided by the utility model comprises a shell, an operating mechanism, an arc extinguish chamber and a contact system, a mounting cavity is formed in the shell, the operating mechanism, the contact system and the arc extinguish chamber are sequentially arranged in the mounting cavity in the direction from the front face to the back face of the shell, and the contact system corresponds to the arc extinguish chamber; a first air outlet is formed in the back face of the shell, and the first air outlet is communicated with the arc extinguish chamber. Since the back surface of the shell is provided with the first gas outlet, and the first gas outlet is communicated with the arc extinguish chamber, the arc extinguish gas can be exhausted from the back surface of the shell, so that the exhaust position is farther from the front surface of the shell, the safety problem possibly caused by the arc extinguish gas to a user side on the front surface of the shell is avoided, and the safety performance of the circuit breaker is effectively improved. And meanwhile, the arc extinguish chamber is close to the first air outlet, so that the exhaust is more convenient and faster.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker. Background Art

[0002] With the rapid development of economy and the rapid improvement of people's living standards, there is a higher demand for household electricity safety. Circuit breakers can be installed on terminal distribution lines. At the same time, they can also connect, carry and disconnect currents under normal or abnormal circuit conditions, forming effective protection for lines and electrical equipment.

[0003] In order to facilitate user operation, existing circuit breakers usually have an operating end on the front of the circuit breaker, and the moving and static contacts driven by the operating end are distributed in the middle of the circuit breaker. Correspondingly, in order to facilitate exhaust, an air outlet is provided on the side of the circuit breaker, so that the moving and static contacts and the air outlet are connected to form a straight channel for exhaust. In this way, although the arc extinguishing gas can be discharged as quickly as possible through the straight channel, since the air outlet position is close to the front of the circuit breaker housing, it may cause safety problems on the user side. Utility Model Content

[0004] The utility model aims to provide a circuit breaker to solve the safety problem caused by unreasonable arrangement of air outlets of the existing circuit breakers.

[0005] The utility model provides a circuit breaker, comprising: a housing, an operating mechanism, an arc extinguishing chamber and a contact system;

[0006] The housing is provided with an installation cavity, and the operating mechanism, the contact system and the arc extinguishing chamber are sequentially arranged in the installation cavity along the direction from the front to the back of the housing, and the contact system corresponds to the arc extinguishing chamber;

[0007] A first gas outlet is disposed on the back side of the shell, and the first gas outlet is communicated with the arc extinguishing chamber.

[0008] As a further technical solution, the release is arranged in the installation cavity and is located on a side of the contact system away from the arc extinguishing chamber.

[0009] As a further technical solution, the operating mechanism includes an operating handle and a rotating shaft, the contact system includes a movable contact and a stationary contact that cooperate with each other, and the movable contact is connected to the rotating shaft;

[0010] The operating handle is located on the front side of the housing and is used to drive the rotating shaft to rotate;

[0011] Along the direction from the bottom to the top of the housing, the rotating shaft and the releaser are arranged in sequence, and the moving contact and the static contact are arranged in sequence.

[0012] As a further technical solution, it also includes a first wiring bank and a second wiring bank, and the back of the housing is also provided with a first outlet and a second outlet;

[0013] One end of the first wiring row is connected to the moving contact, and the other end extends through the first outlet to form a first wiring terminal;

[0014] One end of the second wiring row is connected to the static contact, and the other end extends through the second outlet to form a second wiring terminal;

[0015] Along the direction from the bottom to the top of the housing, the first air outlet is located between the first outlet and the second outlet.

[0016] As a further technical solution, a bridge-type contact is also included, and the first wiring terminal and the second wiring terminal are both connected to the bridge-type contact.

[0017] As a further technical solution, a plurality of the first wiring bank and the second wiring bank are provided, and the first wiring bank corresponds to the second wiring bank one by one to form a multi-pole;

[0018] The back of the housing is provided with a mounting groove, and the mounting groove is located between two adjacent poles;

[0019] The mounting groove is provided with an inter-polar spacer.

[0020] As a further technical solution, a plurality of first air outlets are provided.

[0021] As a further technical solution, two first air outlets are provided and are respectively located at two ends of the arc extinguishing chamber setting direction.

[0022] As a further technical solution, it further comprises a gas converging and outlet component, wherein the gas converging and outlet component is arranged on the back side of the shell;

[0023] The converging gas outlet piece is provided with a second gas outlet and at least one gas inlet, and the gas inlet is connected with the second gas outlet;

[0024] All of the first air outlets are communicated with the air inlet.

[0025] As a further technical solution, the gas converging and outlet piece is a third base, and the third base is also provided with a third outlet and a fourth outlet;

[0026] The third outlet is connected to the first outlet, the fourth outlet is connected to the second outlet, the first terminal extends through the first outlet and the third outlet, and the second terminal extends through the second outlet and the fourth outlet;

[0027] The air inlet is located on a side of the third base facing the shell and is connected with all the first air outlets on the shell. The second air outlet is located on a side of the third base facing away from the shell.

[0028] As a further technical solution, the second air outlet is located in the middle of the third base in the up and down direction.

[0029] As a further technical solution, a plurality of the first wiring bank and the second wiring bank are provided, and the first wiring bank corresponds to the second wiring bank one by one to form a multi-pole;

[0030] A mounting groove is provided on a side of the third base away from the shell, and the mounting groove is located between two adjacent poles;

[0031] The mounting groove is provided with an inter-polar spacer.

[0032] As a further technical solution, a flame extinguishing metal mesh is provided at the second air outlet.

[0033] As a further technical solution, the housing includes a cover, a first base and a second base;

[0034] Along the direction from the front to the back of the shell, the cover, the first base and the second base are connected in sequence;

[0035] The installation cavity is formed among the cover body, the first base and the second base.

[0036] As a further technical solution, it also includes a surface cover, which is arranged on the front side of the shell.

[0037] Compared with the prior art, the circuit breaker provided by the utility model has the following technical advantages:

[0038] The circuit breaker provided by the utility model comprises: a shell, an operating mechanism, an arc extinguishing chamber and a contact system; an installation cavity is arranged in the shell, and the operating mechanism, the contact system and the arc extinguishing chamber are arranged in sequence in the installation cavity along the direction from the front to the back of the shell, and the contact system corresponds to the arc extinguishing chamber; a first air outlet is arranged on the back of the shell, and the first air outlet is communicated with the arc extinguishing chamber.

[0039] Since the first gas outlet is arranged on the back of the shell, and the first gas outlet is connected with the arc extinguishing chamber, the arc extinguishing gas can be discharged from the back of the shell, so that the exhaust position is farther from the front of the shell, avoiding the safety problems that the arc extinguishing gas may cause to the user side of the front of the shell, and effectively improving the safety performance of the circuit breaker. At the same time, since the operating mechanism, the contact system and the arc extinguishing chamber are arranged in the installation cavity in sequence from the front to the back of the shell, the arc extinguishing chamber is close to the first gas outlet, and the arc extinguishing chamber and the first gas outlet can be exhausted through a straight channel, which makes exhaust more convenient and faster.

[0040] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A cross-sectional view of a circuit breaker provided in an embodiment of the utility model;

[0043] Figure 2 A front view schematic diagram of a circuit breaker provided in an embodiment of the utility model;

[0044] Figure 3 A schematic diagram of a circuit breaker provided by an embodiment of the utility model from a lower right side perspective;

[0045] Figure 4 A schematic diagram of a circuit breaker from an upper left side perspective provided by an embodiment of the utility model;

[0046] Figure 5 Another schematic diagram of a circuit breaker from a lower right side perspective provided by an embodiment of the utility model;

[0047] Figure 6 A schematic diagram of the left side of a circuit breaker provided in an embodiment of the utility model;

[0048] Figure 7 A schematic diagram of a circuit breaker provided in an embodiment of the utility model;

[0049] Figure 8 A schematic diagram of the structure of the second base of the circuit breaker provided in the embodiment of the utility model;

[0050] Fig. 9 A schematic diagram of the structure of the circuit breaker provided by the embodiment of the utility model when a third base is provided;

[0051] Fig.10 A schematic diagram of the back side of the circuit breaker provided by the embodiment of the utility model when the third base is provided;

[0052] Fig.11 A schematic diagram of the structure of one side of the third base provided in an embodiment of the utility model;

[0053] Fig.12 This is a schematic diagram of the structure of the other side of the third base provided in an embodiment of the utility model.

[0054] Icons: 1-housing; 2-operating mechanism; 3-arc extinguishing chamber; 4-contact system; 5-front; 6-back; 7-first air outlet; 8-tripper; 9-operating handle; 10-shaft; 11-moving contact; 12-static contact; 13-top; 14-bottom; 15-first terminal block; 16-second terminal block; 17-first outlet; 18-second outlet; 19-first terminal; 20-second terminal; 21-mounting groove; 22-interpolar spacer; 23-cover; 24-first base; 25-second base; 26-face cover; 27-right; 28-left; 29-third base; 30-third outlet; 31-fourth outlet; 32-air inlet; 33-second air outlet; 34-flame extinguishing metal mesh. DETAILED DESCRIPTION

[0055] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0056] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0059] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0060] Specific structure such as Figures 1 to 12 shown.

[0061] The present embodiment provides a circuit breaker, comprising: a shell 1, an operating mechanism 2, an arc extinguishing chamber 3 and a contact system 4; an installation cavity is provided in the shell 1, and the operating mechanism 2, the contact system 4 and the arc extinguishing chamber 3 are sequentially arranged in the installation cavity along the direction from the front 5 to the back 6 of the shell 1, and the contact system 4 corresponds to the arc extinguishing chamber 3; a first air outlet 7 is provided on the back 6 of the shell 1, and the first air outlet 7 is connected to the arc extinguishing chamber 3.

[0062] In this embodiment, since the first gas outlet 7 is provided on the back side 6 of the housing 1, and the first gas outlet 7 is connected to the arc extinguishing chamber 3, the arc extinguishing gas can be discharged from the back side 6 of the housing 1, so that the exhaust position is farther from the front side 5 of the housing 1, avoiding the safety problems that the arc extinguishing gas may cause to the user side of the front side 5 of the housing 1, and effectively improving the safety performance of the circuit breaker. At the same time, since the operating mechanism 2, the contact system 4 and the arc extinguishing chamber 3 are sequentially arranged in the installation cavity along the direction from the front side 5 to the back side 6 of the housing 1, the arc extinguishing chamber 3 is close to the first gas outlet 7, and the arc extinguishing chamber 3 and the first gas outlet 7 can be exhausted through a straight channel, which makes exhaust more convenient and faster.

[0063] In an optional technical solution of this embodiment, the tripper 8 is arranged in the installation cavity and is located on the side of the contact system 4 away from the arc extinguishing chamber 3. The arrangement of the tripper 8 can further improve the safety of the circuit breaker.

[0064] In the optional technical solution of this embodiment, the operating mechanism 2 includes an operating handle 9 and a rotating shaft 10, the contact system 4 includes a moving contact 11 and a stationary contact 12 that cooperate with each other, and the moving contact 11 is connected to the rotating shaft 10; the operating handle 9 is located on the front side 5 of the shell 1, and is used to drive the rotating shaft 10 to rotate; along the direction from the bottom 14 to the top 13 of the shell 1, the rotating shaft 10 and the release 8 are arranged in sequence, and the moving contact 11 and the stationary contact 12 are arranged in sequence.

[0065] In this embodiment, the operating handle 9 is located outside the front face 5 of the housing 1, which is convenient for the user to operate. The user can drive the rotating shaft 10 to rotate by pulling the operating handle 9, so that the moving contact 11 rotates to close and open the switch. At the same time, the rotating shaft 10 and the tripper 8 are arranged in sequence from the bottom 14 to the top 13 of the housing 1, and the space of the installation cavity located on the side of the contact system 4 away from the arc extinguishing chamber 3 is reasonably used to make the layout more reasonable, thereby making the circuit breaker miniaturized; in addition, the moving contact 11 and the static contact 12 are also arranged in sequence from the bottom 14 to the top 13 of the housing 1, so that the moving contact 11 is closer to the rotating shaft 10, which is convenient for connection and improves the space utilization rate in the installation cavity.

[0066] The present embodiment is not limited thereto, and the rotating shaft 10 and the releaser 8 may also be sequentially arranged along the direction from the upper surface 13 to the lower surface 14 of the housing 1, and the moving contact 11 and the static contact 12 may also be sequentially arranged along the direction from the upper surface 13 to the lower surface 14 of the housing 1, which also has the above-mentioned effects and will not be repeated here.

[0067] The optional technical solution of this embodiment also includes a first terminal block 15 and a second terminal block 16, and the back side 6 of the shell 1 is also provided with a first outlet 17 and a second outlet 18; one end of the first terminal block 15 is connected to the moving contact 11, and the other end extends through the first outlet 17 to form a first terminal 19; one end of the second terminal block 16 is connected to the static contact 12, and the other end extends through the second outlet 18 to form a second terminal 20; along the direction from the bottom 14 to the top 13 of the shell 1, the first air outlet 7 is located between the first outlet 17 and the second outlet 18.

[0068] In this embodiment, the first wiring terminal 19 of the first wiring block 15 and the second wiring terminal 20 of the second wiring block 16 are both located at the back side 6 of the housing 1, which is convenient for users to connect the wires.

[0069] Specifically, the arc extinguishing chamber 3 has arc extinguishing grids, and the arc extinguishing grids are arranged in sequence from the bottom 14 to the top 13 of the shell 1. The first terminal block 15 is located on the upper side of the moving contact 11 and the arc extinguishing chamber 3, and the second terminal block 16 is located on the lower side of the static contact 12 and the arc extinguishing chamber 3. At the same time, the first outlet 17 is located on the back side 6 of the shell 1 near the upper end, and the second outlet 18 is located on the back side 6 of the shell 1 near the lower end. The first outlet 17 and the second outlet 18 are in a straight line from the bottom 14 to the top 13 of the shell 1, and the first air outlet 7 is located between the first outlet 17 and the second outlet 18. The overall structure is beautiful and the layout is reasonable, avoiding interference between the first terminal block 15, the second terminal block 16 and the arc extinguishing chamber 3.

[0070] The optional technical solution of this embodiment further includes a bridge-type contact, and the first wiring terminal 19 and the second wiring terminal 20 are both connected to the bridge-type contact.

[0071] In this embodiment, a bridge contact is installed on the first terminal 19 of the first terminal row 15 located outside the back side 6 of the housing 1, and a bridge contact is installed on the second terminal 20 of the second terminal row 16 located outside the back side 6 of the housing 1, so that users can connect wires through the bridge contacts.

[0072] In the optional technical solution of this embodiment, a plurality of first terminal blocks 15 and second terminal blocks 16 are provided, and the first terminal blocks 15 correspond to the second terminal blocks 16 one by one and form multiple poles; a mounting groove 21 is provided on the back side 6 of the shell 1, and the mounting groove 21 is located between two adjacent poles; a pole partition 22 is provided on the mounting groove 21.

[0073] In this embodiment, all the first wiring banks 15 and all the second wiring banks 16 are arranged in intervals from the left side 28 to the right side 27 of the shell 1, and a mounting groove 21 is provided between each adjacent pole, and a pole partition plate 22 is installed on the mounting groove 21 to separate each pole to improve safety.

[0074] In this embodiment, the mounting groove 21 can be a slot, and the interpolar spacer 22 is inserted into the slot, that is, the interpolar spacer 22 and the slot are inserted along the direction from the back 6 to the front 5 of the shell 1; the mounting groove 21 can also be a sliding groove, and the interpolar spacer 22 is slidably installed in the mounting groove 21, that is, the interpolar spacer 22 and the slot are slidably installed along the direction from the top 13 to the bottom 14 of the shell 1.

[0075] The present embodiment is not limited thereto, and the interpolar spacer 22 may also be installed on the housing 1 through a quick-release structure, wherein the quick-release structure may be a snap-fit ​​structure, a magnetic structure or other structures.

[0076] In an optional technical solution of this embodiment, a plurality of first air outlets 7 are provided to improve the exhaust effect and thus improve the safety of the circuit breaker.

[0077] In this embodiment, the plurality of first air outlets 7 are arranged along a direction from the bottom 14 to the top 13 of the housing 1 , and are located between the first outlet 17 and the second outlet 18 .

[0078] Preferably, two first air outlets 7 are provided between the first outlet 17 and the second outlet 18 relative to each other along the direction from the bottom 14 to the top 13 of the shell 1, and the two air outlets are respectively located at both ends of the setting direction of the arc extinguishing chamber 3, thereby effectively ensuring the exhaust effect.

[0079] The optional technical solution of this embodiment also includes a converging air outlet piece, which is arranged on the back side 6 of the shell 1; the converging air outlet piece is provided with a second air outlet and at least one air inlet, and the air inlet is connected to the second air outlet; all the first air outlets 7 are connected to the air inlet.

[0080] In this embodiment, the converging gas outlet piece is provided so that the gas discharged from the plurality of first gas outlets 7 is converging through the converging gas outlet piece and then discharged from one second gas outlet, thereby improving safety.

[0081] In this embodiment, one air inlet can be set, and all the first air outlets 7 are connected to one air inlet; multiple air inlets can also be set, in which case, one air inlet can be connected to one first air outlet 7, and they correspond one to one, or each air inlet can be connected to multiple first air outlets 7; or multiple air inlets can be connected to one first air outlet 7, as long as the convergence requirements can be met.

[0082] In the optional technical solution of this embodiment, the shell 1 includes a cover body 23, a first base 24 and a second base 25; along the direction from the front side 5 to the back side 6 of the shell 1, the cover body 23, the first base 24 and the second base 25 are connected in sequence; an installation cavity is formed between the cover body 23, the first base 24 and the second base 25.

[0083] In this embodiment, the shell 1 is formed by assembling the cover body 23, the first base 24 and the second base 25 in sequence along the direction from the front side 5 to the back side 6 of the shell 1. It is easy to assemble and easy to disassemble the cover body 23, the first base 24 and the second base 25 for separate repair or replacement.

[0084] In the present embodiment, the converging gas outlet part is a third base 29, and the third base 29 is installed on the back side of the second base 25, and the third base 29 is provided with a third outlet 30, a fourth outlet 31, an air inlet 32 ​​and a second air outlet 33, wherein the third outlet 30 is correspondingly connected to the first outlet 17, and the fourth outlet 31 is correspondingly connected to the second outlet 18, so that the first terminal 19 can extend through the first outlet 17 and the third outlet 30, and the second terminal 20 can extend through the second outlet 18 and the fourth outlet 31, the air inlet 32 ​​faces the second base 25 and is connected with all the first air outlets 7 on the second base 25, the second air outlet 33 is located on the side of the third base 29 away from the second base 25 and is connected with the air inlet 32, and preferably, a flame extinguishing metal mesh 34 is provided at the second air outlet 33 to improve safety.

[0085] It should be noted that when the third base 29 is provided, a mounting groove 21 is provided on the back side of the third base 29 , and the mounting groove 21 is located between two adjacent poles; an inter-pole spacer 22 is provided on the mounting groove 21 .

[0086] The optional technical solution of this embodiment further includes a cover 26, which is arranged on the front side 5 of the housing 1 to improve the aesthetics of the front side 5 of the housing 1 and protect the front side 5 of the housing 1.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A circuit breaker, characterized in that: include: It comprises a housing (1), an operating mechanism (2), an arc extinguishing chamber (3) and a contact system (4); The housing (1) is provided with a mounting cavity, and along the direction from the front side (5) to the back side (6) of the housing (1), the operating mechanism (2), the contact system (4) and the arc extinguishing chamber (3) are sequentially arranged in the mounting cavity, and the contact system (4) corresponds to the arc extinguishing chamber (3); A first gas outlet (7) is provided on the back side (6) of the housing (1), and the first gas outlet (7) is in communication with the arc extinguishing chamber (3).

2. The circuit breaker according to claim 1, characterized in that: It also comprises a release (8), wherein the release (8) is arranged in the installation cavity and is located on a side of the contact system (4) away from the arc extinguishing chamber (3).

3. The circuit breaker according to claim 2, characterized in that: The operating mechanism (2) comprises an operating handle (9) and a rotating shaft (10); the contact system (4) comprises a movable contact (11) and a stationary contact (12) that cooperate with each other, and the movable contact (11) is connected to the rotating shaft (10); The operating handle (9) is located on the front side (5) of the housing (1) and is used to drive the rotating shaft (10) to rotate; Along the direction from the bottom (14) to the top (13) of the housing (1), the rotating shaft (10) and the release (8) are arranged in sequence, and the moving contact (11) and the static contact (12) are arranged in sequence.

4. The circuit breaker according to claim 3, characterized in that: It also comprises a first wiring bank (15) and a second wiring bank (16), and the back side (6) of the housing (1) is also provided with a first outlet (17) and a second outlet (18); One end of the first wiring row (15) is connected to the moving contact (11), and the other end extends through the first outlet (17) to form a first wiring terminal (19); One end of the second wiring row (16) is connected to the stationary contact (12), and the other end extends through the second outlet (18) to form a second wiring terminal (20); Along the direction from the bottom (14) to the top (13) of the shell (1), the first air outlet (7) is located between the first outlet (17) and the second outlet (18).

5. The circuit breaker according to claim 4, characterized in that: It also includes a bridge-type contact, and the first wiring terminal (19) and the second wiring terminal (20) are both connected to the bridge-type contact.

6. The circuit breaker according to claim 4, characterized in that: A plurality of the first wiring row (15) and the second wiring row (16) are provided, and the first wiring row (15) corresponds to the second wiring row (16) one by one to form a multi-pole; The back side (6) of the housing (1) is provided with a mounting groove (21), and the mounting groove (21) is located between two adjacent poles; An interpolar spacing plate (22) is provided on the mounting groove (21).

7. The circuit breaker according to claim 4, characterized in that: A plurality of the first air outlets (7) are provided.

8. The circuit breaker according to claim 7, characterized in that: Two first gas outlets (7) are provided, and are respectively located at two ends of the setting direction of the arc extinguishing chamber (3).

9. The circuit breaker according to claim 7, characterized in that: It also includes a gas converging and outlet piece, wherein the gas converging and outlet piece is arranged on the back side (6) of the shell (1); The converging gas outlet piece is provided with a second gas outlet and at least one gas inlet, and the gas inlet is connected with the second gas outlet; All of the first air outlets (7) are in communication with the air inlet.

10. The circuit breaker according to claim 9, characterized in that The gas converging and outlet component is a third base (29), and the third base (29) is also provided with a third outlet (30) and a fourth outlet (31); The third outlet (30) is connected to the first outlet (17) correspondingly, the fourth outlet (31) is connected to the second outlet (18) correspondingly, the first terminal (19) extends through the first outlet (17) and the third outlet (30), and the second terminal (20) extends through the second outlet (18) and the fourth outlet (31); The air inlet (32) is located on a side of the third base (29) facing the shell (1) and is connected to all the first air outlets (7) on the shell (1); the second air outlet (33) is located on a side of the third base (29) facing away from the shell (1).

11. The circuit breaker according to claim 10, characterized in that The second air outlet (33) is located in the middle of the third base (29) in the up-down direction.

12. The circuit breaker according to claim 10, characterized in that A plurality of the first wiring row (15) and the second wiring row (16) are provided, and the first wiring row (15) corresponds to the second wiring row (16) one by one to form a multi-pole; A mounting groove (21) is provided on a side of the third base (29) facing away from the housing (1), and the mounting groove (21) is located between two adjacent poles; An interpolar spacing plate (22) is provided on the mounting groove (21).

13. The circuit breaker according to claim 9, characterized in that A flame extinguishing metal net (34) is provided at the second air outlet (33).

14. The circuit breaker according to any one of claims 1 to 13, characterized in that: The housing (1) comprises a cover (23), a first base (24) and a second base (25); Along the direction from the front side (5) to the back side (6) of the shell (1), the cover (23), the first base (24) and the second base (25) are connected in sequence; The installation cavity is formed between the cover body (23), the first base (24) and the second base (25).

15. The circuit breaker according to any one of claims 1 to 13, characterized in that: It also comprises a face cover (26), wherein the face cover (26) is arranged on the front side (5) of the housing (1).

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