circuit breaker

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to a circuit breaker which comprises a shell and a breaking pole circuit arranged in the shell, the breaking pole circuit comprising a button mechanism, an electric operating device, an operating mechanism and a contact mechanism; the shell comprises a base and an upper cover, the contact mechanism comprises a movable contact and a static contact used in cooperation, the electric operating device comprises a motor and a gear set; the button mechanism is connected with the operating mechanism in drive, the motor is connected with the operating mechanism in drive through the gear set, and the operating mechanism is connected with the movable contact in drive; the circuit breaker further comprises a first control circuit board and a second control circuit board arranged in layers, the motor and the first control circuit board are arranged on the base, the second control circuit board is located between the first control circuit board and the upper cover, and the gear set is arranged between the second control circuit board and the upper cover; the circuit breaker has reasonable internal layout and compact structure.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a circuit breaker. Background Technology

[0002] Existing circuit breakers often have the following problems:

[0003] 1. Due to the unreasonable layout of the internal components of the circuit breaker, the circuit breaker is too large to fit the installation requirements of a small space.

[0004] Second, the temperature rise of the short-circuit protection mechanism of existing circuit breakers is large, and the production cost of the circuit components is high;

[0005] Third, the overload protection mechanism of the existing circuit breaker has too high a temperature rise when a large current flows through it;

[0006] Fourth, the existing circuit breaker control circuit board has insufficient installation space, which is not conducive to the installation and design of the control circuit board;

[0007] Fifth, there is no reliable means to detect the working status of existing circuit breakers. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a circuit breaker with a reasonable internal layout and compact structure.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A circuit breaker includes a housing and a circuit breaking device disposed within the housing. The circuit breaking device includes a push-button mechanism 2a, an electric operating device 3a, an operating mechanism 4a, and a contact mechanism. The housing includes a base 1-1a and a top cover 1-4a. The contact mechanism includes a moving contact 8-1a and a stationary contact 8-2a that cooperate with each other. The electric operating device 3a includes a motor 3-1a and a gear set 3-2a. The push-button mechanism 2a is driven and connected to the operating mechanism 4a. The motor 3-1a is driven and connected to the operating mechanism 4a through the gear set 3-2a. The operating mechanism 4a is driven and connected to the moving contact 8-1a. The circuit breaker also includes a first control circuit board 5-1b and a second control circuit board 5-2b stacked together. The motor 3-1a and the first control circuit board 5-1b are respectively disposed on the base 1-1a. The second control circuit board 5-2b is located between the first control circuit board 5-1b and the top cover 1-4a. The gear set 3-2a is disposed between the second control circuit board 5-2b and the top cover 1-4a.

[0011] Preferably, the first control circuit board 5-1b includes a motor clearance opening at one end thereto, and the motor 3-1a is located on one side of the first control circuit board 5-1b within the motor clearance opening; the second control circuit board 5-2b is located between the motor 3-1a and the upper cover 1-4a.

[0012] Preferably, in the gear set, the shafts of each gear pass through the second control circuit board 5-2b and are fixed on the base 1-1a.

[0013] Preferably, the circuit breaker further includes a first detection element 6-1b and a second detection element 6-2b respectively disposed on the second control circuit board 5-2b, which cooperate with the button mechanism 2a and the gear set 3-2a respectively.

[0014] Preferably, the first detection element 6-1b and the second detection element 6-2b are both microswitches, and the arrangement direction of the first detection element 6-1b and the second detection element 6-2b is perpendicular.

[0015] Preferably, the gear set 3-2a includes a final stage drive gear 3-20a that drives and cooperates with the operating mechanism 4a. The final stage drive gear 3-20a has a gear drive boss on one side, which drives and cooperates with the second detection element 6-2b.

[0016] Preferably, the housing further includes a first partition 1-2a disposed between the base 1-1a and the top cover 1-4a, and a first control circuit board 5-1b disposed between the base 1-1a and the first partition 1-2a; the operating mechanism 4a and the contact mechanism are both disposed on the first partition 1-2a and located between the first partition 1-2a and the top cover 1-4a.

[0017] Preferably, the first control circuit board 5-1b includes a first sampling element 7-1b and a second sampling element 7-2b; the circuit breaker further includes a direct-through circuit disposed in the housing, the direct-through circuit including a direct-through terminal block 1b; the first sampling element 7-1b is connected to the stationary contact 8-2a, and the second sampling element 7-2b is connected to the direct-through terminal block 1b.

[0018] Preferably, the circuit breaking electrode further includes an overload protection mechanism 7a, which includes a bimetallic strip 7-1a connected to the stationary contact 8-2a.

[0019] Preferably, the first control circuit board 5-1b further includes a motor connection plug 7-5b, and the motor 3-1a is connected to the motor connection plug 7-5b via a connecting wire.

[0020] The circuit breaker of the present invention has a first control circuit board 5-1b and a second control circuit board 5-2b stacked together, a motor 3-1a disposed between the second control circuit board 5-2b and the base 1-1a, and a gear set 3-2a disposed between the second control circuit board 5-2b and the upper cover 1-4a. This layout is reasonable and compact, which helps save internal space and reduce the overall size of the circuit breaker. Furthermore, the first detection element 6-1b detects the position of the push-button mechanism 2a, and the second detection element 6-2b detects the position of the gears in the gear set. Therefore, the operating state of the circuit breaker (including closed, open, and tripped states) can be determined from the output signals of the first and second detection elements 6-1b and 6-2b. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the circuit breaker of the present invention;

[0022] Figure 2 This is an exploded structural diagram of the circuit breaker of the present invention;

[0023] Figure 3 This is a structural schematic diagram of the base and control circuit board assembly of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the first partition and the circuit breaking electrode of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the second partition, the circuit breaker terminal block, and the overload protection mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the second partition of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the first partition of the present invention;

[0028] Figure 8 This is a schematic diagram of the connection structure of the short-circuit protection mechanism, the circuit breaker conductive plate, and the second circuit breaker terminal of the present invention.

[0029] Figure 9 This is a schematic diagram of the short-circuit protection mechanism of the present invention;

[0030] Figure 10 This is a schematic diagram of the coil structure of the present invention;

[0031] Figure 11 This is a schematic diagram of the structure of the base of the present invention;

[0032] Figure 12 This is a schematic diagram of the structure of the cover of the present invention. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-12 The given embodiments further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0034] like Figure 1-4 As shown in Figure 12, the circuit breaker of the present invention is preferably a plug-in type circuit breaker, which includes a housing and a circuit breaking electrode circuit disposed within the housing. The housing includes a base 1-1a and a top cover 1-4a. The circuit breaking electrode circuit includes a button mechanism 2a, an operating mechanism 4a, and a contact mechanism. The contact mechanism includes a moving contact 8-1a and a stationary contact 8-2a used in conjunction. The button mechanism 2a is inserted into one end of the housing and is driven and connected to the operating mechanism 4a. The operating mechanism 4a is driven and connected to the moving contact 8-1a. Pressing / pulling the button mechanism 2a drives the moving contact 8-1a and the stationary contact 8-2a to close / open through the operating mechanism 4a, thereby closing / opening the circuit breaker.

[0035] Preferred, such as Figure 1-4 As shown, the circuit breaker of the present invention also includes a direct-through circuit disposed within the housing. The direct-through circuit includes a direct-through terminal block 1b and a first direct-through terminal 4-1b and a second direct-through terminal 4-2b respectively connected to both ends of the direct-through terminal block 1b. That is, the direct-through circuit means that the terminals at both ends are directly connected by wires without any breakpoint.

[0036] Preferred, such as Figure 1-3 As shown, the circuit breaker also includes an electric operating device 3a, which comprises a motor 3-1a and a gear set 3-2a. The motor 3-1a drives the operating mechanism 4a via the gear set 3-2a. The electric operating device 3a drives the moving contact 8-1a to close with the stationary contact 8-2a via the operating mechanism 4a, thereby closing the circuit breaker. Further, the electric operating device 3a can also drive the circuit breaker to open via the operating mechanism 4a, or the electric operating device 3a can also drive the operating mechanism 4a via a push-button mechanism 2a, thereby opening the circuit breaker.

[0037] Preferred, such as Figure 1-4 As shown, the circuit breaker also includes a short-circuit protection mechanism 5a, an overload protection mechanism 7a, and an arc-extinguishing chamber 6a. The short-circuit protection mechanism 5a and the overload protection mechanism 7a are respectively driven and cooperate with the operating mechanism 4a. When the circuit breaker is in a short-circuit or overload fault, the operating mechanism 4a drives the circuit breaker to open or trip. The arc-extinguishing chamber 6a cooperates with the contact mechanism to extinguish the arc generated when the moving contact 8-1a and the stationary contact 8-2a close / open. Depending on actual needs, one or more of the short-circuit protection mechanism 5a, the overload protection mechanism 7a, and the arc-extinguishing chamber 6a can be omitted.

[0038] Preferred, such as Figure 1-4As shown, the circuit breaking device further includes a first circuit breaking terminal 3-1b and a second circuit breaking terminal 3-2b. The contact mechanism, overload protection mechanism 7a, and short-circuit protection mechanism 5a are connected in series between the first circuit breaking terminal 3-1b and the second circuit breaking terminal 3-2b. Further, as... Figure 1 As shown, the first circuit breaker terminal 3-1b, the overload protection mechanism 7a, the contact mechanism, the short circuit protection mechanism 5a, and the second circuit breaker terminal 3-2b are connected in series.

[0039] Preferred, such as Figure 1 As shown, the first circuit breaker terminal 3-1b and the button mechanism 2a are arranged side-by-side at one end of the housing, and the second circuit breaker terminal 3-2b is arranged at the other end of the housing; the operating mechanism 4a and the overload protection mechanism 7a are arranged in the middle of the housing; the short-circuit protection mechanism 5a and the arc-extinguishing chamber 6a are arranged side-by-side; the button mechanism 2a and the short-circuit protection mechanism 5a are respectively located on both sides of the operating mechanism 4a, and the first circuit breaker terminal 3-1b and the arc-extinguishing chamber 6a are located on both sides of the overload protection mechanism 7a; the short-circuit protection mechanism 5a is located between the second circuit breaker terminal 3-2b and the operating mechanism 4a. It should be noted that the positions of the overload protection mechanism 7a and the short-circuit protection mechanism 5a can be interchanged. Furthermore, as... Figure 2-4 As shown, the first through-pole terminal 4-1b and the first disconnect-pole terminal 3-1b are disposed at one end of the housing; the second through-pole terminal 4-2b and the second disconnect-pole terminal 3-2b are disposed side by side at intervals at the other end of the housing.

[0040] The main improvements of the circuit breaker of this invention are as follows:

[0041] Preferred, such as Figure 1 , 2 As shown in Figure 4, the housing also includes a second partition 1-3a disposed between the base 1-1a and the upper cover 1-4a, with the second partition 1-3a arranged side-by-side with the button mechanism 2a; the circuit breaker also includes a circuit breaker terminal block 2b connected in series in the circuit breaker, the motor 3-1a is disposed on the base 1-1a and located between the base 1-1a and the second partition 1-3a, and the circuit breaker terminal block 2b is disposed on the second partition 1-3a and located between the second partition 1-3a and the upper cover 1-4a. The positional arrangement of the circuit breaker terminal block 2b, the second partition 1-3a and the motor 3-a, as well as the positional arrangement of the second partition 1-3a and the button mechanism 2a, fully utilizes the internal space of the housing, making the internal structure of the circuit breaker more compact and contributing to the miniaturization trend of circuit breakers. Furthermore, as... Figure 2 , 4As shown in Figure 5, the second partition 1-3a includes a second partition outer section 1-30a and a second partition inner section 1-31a connected in sequence. A terminal assembly slot is provided on each side of the second partition outer section 1-30a. The first circuit breaker terminal 3-1b and the first through terminal 4-1b are each disposed in one of the terminal assembly slots. The motor 3-1a and the circuit breaker terminal block 2b are located on both sides of the second partition inner section 1-31a. The second partition 1-3a achieves both the stacked arrangement of the first circuit breaker terminal 3-1b and the first through terminal 4-1b and ensures the insulation between them, making the internal layout of the circuit breaker more compact while ensuring the insulation performance of the circuit breaker.

[0042] Preferred, such as Figure 1-4 As shown, the circuit breaker terminal block 2b is connected in series between the first circuit breaker terminal block 3-1b and the overload protection mechanism 7a.

[0043] Preferred, such as Figure 2 and 3 As shown, the circuit breaker of the present invention further includes a control circuit board assembly disposed within the housing, the control circuit board assembly including a first control circuit board 5-1b; as Figure 2-4 As shown, the housing also includes a first partition 1-2a disposed between the base 1-1a and the upper cover 1-4a; the operating mechanism 4a, contact mechanism, short-circuit protection mechanism 5a, overload protection mechanism 7a, and arc-extinguishing chamber 6a are respectively disposed on the first partition 1-2a and are all located between the first partition 1-2a and the upper cover 1-4a; the first control circuit board 5-1b is disposed on the base 1-1a and located between the base 1-1a and the first partition 1-2a. The first partition 1-2a and the base 1-1a cooperate to provide a larger assembly space for the first control circuit board 5-1b, which facilitates the assembly of the first control circuit board 5-1b, facilitates the design of the first control circuit board 5-1b, and, more importantly, the first partition 1-2a separates the first control circuit board 5-1b from the contact mechanism and the arc-extinguishing chamber 6a, thereby minimizing the impact of the electric arc on the first control circuit board 5-1b, ensuring the stable operation of the first control circuit board 5-1b and extending its service life. Furthermore, the first partition 1-2a and the second partition 1-3a work together to isolate the first control circuit board 5-1b from the circuit breaker, which helps to further improve the stability and service life of the first control circuit board 5-1b.

[0044] Preferred, such as Figure 1 , 2As shown in Figure 4, the first partition 1-2a also includes an arc-ignition channel 9a that cooperates with the arc-extinguishing chamber 6a. The inlet of the arc-extinguishing chamber 6a faces the operating mechanism 4a and cooperates with the contact mechanism, while the outlet of the arc-extinguishing chamber 6a is opposite to the arc-ignition channel 9a. The arc-ignition channel 9a, in cooperation with the arc-extinguishing chamber 6a, prevents ionized gas or residual arc discharged from the arc-extinguishing chamber 6a from damaging other components inside the circuit breaker, thus helping to ensure the stable operation of the circuit breaker and extend its service life. Furthermore, as... Figure 1 As shown, the arc-initiating channel 9a is provided with multiple vertical baffles 9-1a and multiple horizontal baffles 9-2a. The vertical baffles 9-1a are arranged side-by-side at intervals at one end of the arc-initiating channel 9a near the arc-extinguishing chamber 6a, while the horizontal baffles 9-2a are arranged alternately at the other end of the arc-initiating channel 9a along its extension direction. The extension direction of the vertical baffles 9-1a is consistent with the extension direction of the arc-initiating channel 9a, while the extension direction of the horizontal baffles 9-2a intersects with the extension direction of the arc-initiating channel 9a. The vertical baffles 9-1a and horizontal baffles 9-2a effectively cut the electric arc, which is beneficial for improving arc-extinguishing efficiency and effect, and thus enhancing the arc-extinguishing performance of the circuit breaker.

[0045] Preferred, such as Figure 2 and 3 As shown, the control circuit board assembly also includes a second control circuit board 5-2b stacked on top of the first control circuit board 5-1b, and a gear set 3-2a disposed on the second control circuit board 5-2b between the second control circuit board 5-2b and the upper cover 1-4a. Further, as... Figure 2 and 3 As shown, the circuit breaker of the present invention further includes a first detection element 6-1b and a second detection element 6-2b respectively disposed on the second control circuit board 5-2b, which cooperate with the push-button mechanism 2a and the gear set 3-2a respectively. Further, as... Figure 2 and 3 As shown, both the first detection element 6-1b and the second detection element 6-2b are microswitches. The first detection element 6-1b detects the position of the button mechanism 2a, and the second detection element 6-2b detects the position of the gears in the gear set. Thus, the operating status of the circuit breaker (including closed, open, and tripped status) can be determined from the output signals of the first detection element 6-1b and the second detection element 6-2b.

[0046] Preferred, such as Figure 8 and 9As shown, the short-circuit protection mechanism 5a includes a frame 5-4a, an iron core assembly, a push rod 5-1a, a coil 5-2a, and a magnetic yoke 5-3a. The iron core assembly and the push rod 5-1a are located in the middle of the frame 5-4a. The coil 5-2a is sleeved on the frame 5-4a, and the magnetic yoke 5-3a wraps around the coil 5-2a. The coil 5-2a has a U-shaped structure and is connected in series with the contact mechanism. The short-circuit protection mechanism 5a has a simple structure, is easy to assemble, and helps to improve the assembly efficiency of the circuit breaker of the present invention. Furthermore, the coil 5-2a includes a coil body 5-20a and a first welding foot 5-21a and a second welding foot 5-22a respectively connected to both ends of the coil body 5-20a. The first welding foot 5-21a and the second welding foot 5-22a are relatively staggered to facilitate the connection of the coil 5-2a.

[0047] The circuit breaker of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] like Figure 1-4 As shown in Figures 1 and 12, this is an embodiment of the circuit breaker of the present invention.

[0049] like Figure 1-4 As shown in Figures 1 and 12, the circuit breaker of the present invention is preferably a plug-in type circuit breaker, which includes a housing and a breaking pole circuit and a through pole circuit respectively disposed in the housing.

[0050] like Figure 1-4 As shown, the circuit breaking device includes a button mechanism 2a, an electric operating device 3a, an operating mechanism 4a, a contact mechanism, a short-circuit protection mechanism 5a, an overload protection mechanism 7a, an arc-extinguishing chamber 6a, a first circuit breaking terminal 3b-1, and a second circuit breaking terminal 3b-2; the electric operating device 3a includes a motor 3-1a and a gear set 3-2a, and the contact mechanism includes a moving contact 8-1a and a stationary contact 8-2a used in conjunction; the first circuit breaking terminal 3-1b, the overload protection mechanism 7a, the contact mechanism, the short-circuit protection mechanism 5a, and the second circuit breaking terminal 3-2b are connected in series; The short-circuit protection mechanism 5a and the overload protection mechanism 7a are respectively driven and cooperate with the operating mechanism 4a. When a short circuit or overload fault occurs in the circuit breaker, the short-circuit protection mechanism 5a or the overload protection mechanism 7a causes the circuit breaker to open (or trip) through the operating mechanism 4a. The arc-extinguishing chamber 6a cooperates with the contact mechanism to extinguish the arc generated when the moving contact 8-1a and the stationary contact 8-2a close / open. The button mechanism 2a is inserted into one end of the housing and is driven and connected to the operating mechanism 4a. The motor 3-1a is driven and cooperates with the operating mechanism 4a through the gear set 3-2a. The operating mechanism 4a is driven and connected to the moving contact 8-1a. Furthermore, combined with Figure 1As shown, pressing / pulling the button mechanism 2a can drive the moving contact 8-1a and the stationary contact 8-2a to close / open through the operating mechanism 4a, thereby closing / opening the circuit breaker; the electric operating device 3a can drive the moving contact 8-1a and the stationary contact 8-2a to close / open through the operating mechanism 4a, and the electric operating device 3a can also drive the moving contact 8-1a and the stationary contact 8-2a to close / open through the button mechanism 2a and the operating mechanism 4a.

[0051] Specifically, in combination Figure 1 As shown, the gear set 3-2a of the electric operating device 3a directly engages with the operating mechanism 4a (the transmission component 4-1a of the operating mechanism 4a) to drive the circuit breaker to close. A drive boss is provided on one of the gears in the gear set 3-2a of the electric operating device 3a. When the circuit breaker is closed, the drive boss engages with the button mechanism 2a, causing the button mechanism 2a to move (in the same direction as when pulling the button mechanism 2a) and, through the operating mechanism 4a, to open the circuit breaker. During the process of the electric operating device 3a driving the circuit breaker to open / close, the motor 3-1a always rotates in the same direction. Alternatively, the electric operating device 3a can directly engage with the operating mechanism 4a to close / open the circuit breaker, with the motor 3-1a rotating in the first direction to close the circuit breaker and in the second direction to open it. The first and second directions are opposite to each other, which is the same principle as the existing electric operating devices driving the circuit breaker to close / open, and will not be elaborated further here.

[0052] Preferred, such as Figure 1 , 2 As shown in Figure 4, the circuit breaking electrode circuit also includes a circuit breaking electrode terminal block 2b, which is connected in series between the first circuit breaking electrode terminal block 3-1b and the overload protection mechanism 7a.

[0053] Preferred, such as Figure 1 , 2 As shown in Figures 4 and 8, the circuit breaking electrode circuit further includes a circuit breaking electrode conductive plate 8b, which is connected in series between the short-circuit protection mechanism 5a and the second circuit breaking electrode terminal 3-2b. Further, the circuit breaking electrode conductive plate 8b is a manganese-copper shunt.

[0054] like Figure 4 As shown, the through-pole circuit includes a through-pole terminal block 1b and a first through-pole terminal 4-1b and a second through-pole terminal 4-2b respectively disposed at both ends of the through-pole terminal block 1b.

[0055] Preferred, such as Figure 1-4As shown, the first disconnecting terminal 3-1b, the first through terminal 4-1b, and the button mechanism 2a are located at the same end of the housing. The second disconnecting terminal 3-2b and the second through terminal 4-2b are arranged side-by-side at an interval at the other end of the housing. The operating mechanism 4a and the overload protection mechanism 7a are arranged side-by-side in the middle of the housing. The arc-extinguishing chamber 6a and the short-circuit protection mechanism 5a are arranged side-by-side. The electric operating device 3a and the button mechanism 2a are arranged side-by-side and located between the first disconnecting terminal 3-1b and the overload protection mechanism 4-2b. The gear set 3-2a is located between the motor 3-1a and the button mechanism 2a. The arc-extinguishing chamber 6a is located between the overload protection mechanism 7a and the second through terminal 4-2b. The short-circuit protection mechanism 5a is located between the operating mechanism 4a and the second disconnecting terminal 3-2b. The button mechanism 2a and the short-circuit protection mechanism 5a are located on both sides of the operating mechanism 4a.

[0056] like Figure 1 , 2 As shown in Figures 4 and 5, one embodiment of the circuit breaker terminal block 2b is described: the circuit breaker terminal block 2b includes an outer terminal block 2-5b, an outer transition plate 2-2b, a main body plate 2-1b, an inner transition plate 2-3b, and an inner terminal block 2-4b connected in sequence. The outer transition plate 2-2b, the main body plate 2-1b, and the inner transition plate 2-3b are generally arranged in a U-shape. The outer terminal block 2-5b and the inner terminal block 2-4b extend towards both ends of the circuit breaker terminal block. The outer terminal block 2-5b is connected to the first circuit breaker terminal block 3-1b, and the inner terminal block 2-4b is connected to the overload protection mechanism 7a. Further, as... Figure 5 As shown, the circuit breaker terminal block 2b includes two first limiting feet that protrude from one side and are spaced apart. Further, as... Figure 5 As shown, the circuit breaker terminal block 2b is an integral structure, formed by punching and bending a single metal plate.

[0057] Preferred, such as Figure 2 and 3 As shown, the circuit breaker of the present invention further includes a control circuit board assembly, which includes a first control circuit board 5-1b and a second control circuit board 5-2b respectively disposed within the housing. Further, as... Figure 2 , 3 As shown, the second control circuit board 5-2b and the first control circuit board 5-1b are stacked, the first control circuit board 5-1b is respectively disposed on the base 1-1a, and the second control circuit board 5-2b is located between the first control circuit board 5-1b and the upper cover 1-4a.

[0058] Preferred, such as Figure 2 and 3As shown, the first control circuit board 5-1b includes a first sampling element 7-1b and a second sampling element 7-2b. The first sampling element 7-1b is connected to the stationary contact 8-2a, and the second sampling element 7-2b is connected to the through-hole terminal block 1b. Further, as... Figure 1 and 7 As shown, the first partition 1-2a includes a partition clearance hole for avoiding the first sampling element 7-1b and located on the outer peripheral sidewall of the arc-starting channel 9a of the first partition 1-2a, the first sampling element 7-1b being located inside the partition clearance hole; the second sampling element 7-2b being located between the sidewall of the base 1-1a and the sidewall of the first partition 1-2a.

[0059] Preferred, such as Figure 2 and 3 As shown, the first control circuit board 5-1b also includes a conductive plate connector 7-3b, and the circuit breaker conductive plate 8b is connected to the conductive plate connector 7-3b via a connecting wire.

[0060] Preferred, such as Figure 3 As shown, the first control circuit board 5-1b also includes a motor connection plug 7-5b, and the motor 3-1a is connected to the motor connection plug 7-5b via a connecting wire.

[0061] Preferred, such as Figure 2 and 3 As shown, the first control circuit board 5-1b further includes an output signal terminal 7-4b, which is located at the end of the first control circuit board 5-1b away from the operating mechanism 4a. Furthermore, the output signal terminal 7-4b has a square column structure, with a positioning boss on each of its pair of sidewalls.

[0062] Preferably, the first control circuit board 5-1b includes a circuit breaker protection circuit and a control circuit, which can be used for automatic opening and closing control, current and voltage sampling and monitoring, and external communication.

[0063] Specifically, such as Figure 2 In the indicated direction, the first sampling element 7-1b, the second sampling element 7-2b, and the conductive plate connector 7-3b are disposed at the lower end of the first control circuit board 5-1b. The first sampling element 7-1b and the second sampling element 7-2b are located on the left side of the lower end of the first control circuit board 5-1b, and the conductive plate connector 7-3b is located on the right side of the lower end of the first control circuit board 5-1b. The motor connector 7-5b is disposed at the upper end of the first control circuit board 5-1b. The output signal terminal 7-4a is disposed at the middle of the lower end of one side of the first control circuit board 5-1b.

[0064] Preferred, such as Figure 3As shown, the gear set 3-2a is disposed between the second control circuit board 5-2b and the upper cover 1-4a. Further, as... Figure 3 As shown, in the gear set 3-2a, the shafts of each gear pass through the second control circuit board 5-2b and are fixed on the base 1-1a.

[0065] Preferred, such as Figure 2 and 3 As shown, the circuit breaker of the present invention further includes a first detection element 6-1b and a second detection element 6-2b respectively disposed on the second control circuit board 5-2b, which cooperate with the push-button mechanism 2a and the gear set 3-2a respectively. Further, as... Figure 2 and 3 As shown, both the first detection element 6-1b and the second detection element 6-2b are microswitches, and their arrangement directions are perpendicular. It should be noted that the perpendicular arrangement of the first and second detection elements 6-1b ensures that the swing plane of the drive rod of the first detection element 6-1b is perpendicular to the second control circuit board 5-2b, and the swing plane of the drive rod of the second detection element 6-2b is parallel to the second control circuit board 5-2b. This allows them to better cooperate with the button mechanism 2a and the gear set 3-2a, respectively.

[0066] Preferred, such as Figure 3 As shown, the gear set 3-a includes a final stage drive gear 3-20a that drives and cooperates with the operating mechanism 4a. The final stage drive gear 3-20a has a gear drive boss on one side, which drives and cooperates with the second detection element 6-2a.

[0067] Specifically, in combination Figure 2 and 3 As shown, when the button mechanism 2a is pressed to close the circuit breaker via the operating mechanism 4a, the button mechanism 2a presses against the drive rod of the first detection element 6-1b, triggering the first detection element 6-1b. When the button mechanism 2a is pulled to open the circuit breaker via the operating mechanism 4a, the button mechanism 2a separates from the drive rod of the first detection element 6-1a. When the electric operating device 3a drives the circuit breaker to close via the operating mechanism 4a, the gear drive boss presses against the drive rod of the second detection element 6-2b, triggering the second detection element 6-2b. When the electric operating device 3a drives the circuit breaker to open via the button mechanism 2a and the operating mechanism 4a, the gear drive boss releases the drive rod of the second detection element 6-1b.

[0068] Preferred, such as Figure 1-4 As shown in Figures 6-7 and 11-12, one embodiment of the housing is described: the housing includes a base 1-1a, a top cover 1-4a, and a first partition 1-2a and a second partition 1-3a respectively disposed between the base 1-1a and the top cover 1-4a.

[0069] Preferred, such as Figure 1 , 2 As shown in Figures 4 and 7, the operating mechanism 4a, overload protection mechanism 7a, short-circuit protection mechanism 5a, and arc-extinguishing chamber 6a are respectively disposed on the first partition 1-2a and located between the first partition 1-2a and the upper cover 1-4a. The first control circuit board 5-1b is disposed on the base 1-1a and located between the base 1-1a and the first partition 1-2a. The second partition 1-3a is arranged side by side with the button mechanism 2a. The motor 3-1a is disposed on the base 1-1a and located between the second partition 1-3a. The circuit breaker terminal block 2b is disposed on the second partition 1-3a and located between the second partition 1-3a and the upper cover 1-4a. Further, as... Figure 1 , 4 As shown in Figure 5, the first disconnecting terminal 3-1b is disposed on one side of the second partition 1-3a and located between the second partition 1-3a and the base 1-1a, and the first through terminal 4-1b is disposed on the other side of the second partition 1-3a and located between the second partition 1-3a and the top cover 1-4a. The first through terminal 4-1b and the first disconnecting terminal 3-1b are stacked along the thickness direction of the shell and located on both sides of the second partition 1-3a.

[0070] Preferred, such as Figure 11 As shown, the base 1-1a includes a motor assembly cavity 1-10a disposed on its bottom wall, and the motor 3-1a is disposed within the motor assembly cavity 1-10a. The motor 3-1a is reliably confined between the second partition 1-3a and the base 1-1a, preventing the motor 3-1a from moving around and also helping to reduce the size of the circuit breaker.

[0071] Preferred, such as Figure 6 , 7 As shown in Figure 11, one side of the direct-connection terminal plate 1b is respectively limited and engaged with the first partition plate 1-2a and the second partition plate 1-3a, and the other side of the direct-connection terminal plate 1b is limited and engaged with the base 1-1a. Further, as... Figure 7 As shown, the first partition 1-2a includes a third limiting slot 1-22a, as... Figure 6 As shown, the second partition 1-3a includes a second limiting slot 1-33a, as... Figure 11 As shown, the base 1-1a includes a base limiting slot 1-12a. One side of the through-hole terminal block 1b is respectively engaged with the second limiting slot 1-33a and the third limiting slot 1-22a for insertion and limiting, and the other side of the through-hole terminal block 1b is engaged with the base limiting slot 1-12a for insertion and limiting. Specifically, as... Figure 11 As shown, the base limiting slot 1-12a is disposed on one side wall of the base 1-1a, as... Figure 6As shown, the second limiting slot 1-33a is disposed on the side of the second partition 1-3a facing the base 1-1a, as... Figure 7 As shown, the third limiting slot 1-22a is disposed on the side of the first partition 1-2a facing the base 1-1a.

[0072] Preferred, such as Figure 5 As shown, the circuit breaker terminal block 2b includes two first limiting feet that protrude from one side and are spaced apart. The second partition 1-3a includes two first limiting slots 1-32a that are spaced apart, and the two first limiting feet are respectively inserted into the two first limiting slots 1-32a.

[0073] Preferred, such as Figure 1 , 2 As shown in Figure 4, the first partition 1-2a further includes an arc-ignition channel 9a that cooperates with the arc-extinguishing chamber 6a; the inlet of the arc-extinguishing chamber 6a faces the operating mechanism 4a and cooperates with the contact mechanism, and the contacts of the arc-extinguishing chamber 6a are opposite to and cooperate with the arc-ignition channel 9a. Further, as... Figure 1 As shown, the arc-initiating channel 9a is provided with multiple vertical baffles 9-1a and multiple horizontal baffles 9-2a. The multiple vertical baffles 9-1a are arranged side by side at intervals at one end of the arc-initiating channel 9a near the arc-extinguishing chamber 6a, and the multiple horizontal baffles 9-2a are arranged at the other end of the arc-initiating channel 9a and are arranged alternately side by side along the extension direction of the arc-initiating channel 9a. The extension direction of the vertical baffles 9-1a is consistent with the extension direction of the arc-initiating channel 9a, and the extension direction of the horizontal baffles 9-2a intersects (e.g., perpendicular to) the extension direction of the arc-initiating channel 9a.

[0074] Preferred, such as Figure 3 , 7 As shown in Figure 11, the base 1-1a includes a signal terminal assembly slot 1-13a, the first partition 1-2a includes a signal terminal limiting platform 1-23a disposed on the side of the partition facing the base 1-1a, and the output signal terminal 7-4b is disposed in the signal terminal assembly slot 1-13a and limited between the base 1-1a and the signal terminal limiting platform 1-23a.

[0075] Preferred, such as Figure 1 , 3 As shown in Figures 11 and 12, the housing further includes a first mounting guide rib 1-11a and a second mounting guide rib 1-40a arranged side-by-side and spaced apart on one side, respectively disposed on the side wall of the base 1-1a and the side wall of the top cover 1-4a. Further, as... Figure 11 and 12As shown, the first mounting guide rib 1-11a and the second mounting guide rib 1-40a both extend along the length of the housing. When the circuit breaker of the present invention is assembled into the mounting cabinet or distribution cabinet, the first mounting guide rib 1-11a and the second mounting guide rib 1-40a respectively cooperate with the cabinet body to limit the circuit breaker, so as to avoid the circuit breaker deviating from the correct position and / or the position being skewed, which would affect the normal operation of the circuit breaker.

[0076] like Figure 4-6 As shown, this is an embodiment of the second partition 1-3a: The second partition 1-3a includes a second partition outer section 1-30a and a second partition inner section 1-31a connected in sequence. Each side of the second partition outer section 1-30a is provided with a terminal assembly slot. The first through pole terminal 4-1b and the first disconnect pole terminal 3-1b are respectively disposed in the two terminal assembly slots. The disconnect pole terminal board 2b is disposed on the second partition inner section 1-31a and located between the second partition inner section 1-31a and the upper cover 1-4a. The motor 3-1a is disposed on the base 1-1a and located between the base 1-1a and the second partition inner section 1-31a.

[0077] Preferred, such as Figure 4-6 As shown, the inner section 1-31a of the second partition includes a first horizontal wall 1-310a and a first vertical wall 1-311a. The first horizontal wall 1-310a is located in the middle of the first vertical wall 1-311a. The circuit breaker terminal block 2b and the motor 3-1a are respectively located on both sides of the first horizontal wall 1-310a. A second limiting slot 1-33a is provided on the side of the first vertical wall 1-311a facing the base 1-1a. Further, as... Figure 6 As shown, the first transverse wall 1-310a has a partition motor limiting groove on the side facing the base 1-1a.

[0078] Preferred, such as Figure 5 As shown, the second partition 2b also includes two spaced-apart first limiting slots 1-32a. Specifically, as... Figure 5 As shown, the two first limiting slots 1-32a are located at both ends of the inner section 1-31a of the second partition.

[0079] like Figure 1As shown, one embodiment of the button mechanism 2a is illustrated: the button mechanism 2a includes a button component 2-1a, a first connecting rod 2-2a, a connecting member 2-3a, and a second connecting rod 2-4a connected in sequence. The button component 2-1a is slidably mounted on the housing, and the second connecting rod 2-4a is also drivenly connected to the rotating plate 4-4a of the operating mechanism 4a. It should be noted that the button component 2-1a, the first connecting rod 2-2a, and the connecting member 2-3a can also be configured as an integral component. However, in order to better cooperate with the electric operating device 3a (for example, the electric operating device 3a drives the connecting member 2-3a to open the circuit breaker through the operating mechanism 4a) and to facilitate the setting of locking mechanisms (for example, a locking mechanism to prevent the circuit breaker from being installed in the installation cabinet or distribution cabinet when the circuit breaker is closed, or a locking mechanism to prevent the circuit breaker from being pulled out of the installation cabinet or distribution cabinet when the circuit breaker is closed), the circuit breaker of the present invention preferably adopts the above-mentioned split button mechanism 2a.

[0080] like Figure 1 As shown, this is one embodiment of the operating mechanism 4a: The operating mechanism 4a includes a transmission component 4-1a, a third connecting rod 4-2a, a locking component 4-3a, a rotating plate 4-4a, and a jump fastener 4-5a. The transmission component 4-1a and the rotating plate 4-4a are pivotally mounted on the first partition 1-2a, and the locking component 4-3a and the jump fastener 4-5a are pivotally mounted on the rotating plate 4-4a. The transmission component 4-1a is connected to the locking component 4-3a via the third connecting rod 4-2a. The rotating plate 4-4a is driven to connect with the moving contact 8-1a. The overload protection mechanism 7a and the short circuit protection mechanism 5a are driven to cooperate with the jump fastener 4-1a.

[0081] like Figure 1 , 2 As shown in Figures 4 and 5, one embodiment of the overload protection mechanism 7a is described: the overload protection mechanism 7a includes a bimetallic strip 7-1a and a drive linkage 7-2a. One end of the bimetallic strip 7-1a is connected to the stationary contact 8-2a, and the other end is driven to the jump fastener 4-5a of the operating mechanism 4a via the drive linkage 7-2a. Further, as... Figure 1 As shown, the first partition 1-2a includes a guide rail structure 1-21a. One end of the drive link 7-1a is drivenly connected to the trip fastener 4-5a, and the other end cooperates with the guide rail structure 1-21a, thereby restricting and guiding the movement path of the drive link 7-1a and ensuring the time-delay tripping characteristics of the circuit breaker. Further, as... Figure 1 As shown, the guide rail structure 1-21a is a guide groove provided on the first partition 1-21a.

[0082] Preferred, such as Figure 5As shown, one end of the circuit breaker terminal block 2b is connected to the first circuit breaker terminal block 3-1b, and the other end is connected to the middle of the bimetallic strip 7-1a and the stationary contact bridge 8-21a of the stationary contact 8-2a through the first flexible connection 9-1b and the second flexible connection 9-2b respectively. The above-mentioned current diversion method can reduce the overall temperature rise of the circuit breaker.

[0083] like Figure 8-10 The diagram illustrates one embodiment of the short-circuit protection mechanism 5a: The short-circuit protection mechanism 5a includes a frame 5-4a, a core assembly, a push rod 5-1a, a coil 5-2a, and a magnetic yoke 5-3a. The core assembly 5-0a, spring, and push rod 5-1a are respectively disposed in the middle of the frame 5-4a. The coil 5-2a is sleeved on the frame 5-4a, and the magnetic yoke 5-3a wraps around the coil 5-2a. The coil 5-2a has a U-shaped structure. The coil 5-2a has a simple structure, satisfying the instantaneous tripping characteristic of the short-circuit protection mechanism 5a while significantly reducing heat generation and providing good heat dissipation, thus ensuring the reliability of the short-circuit protection mechanism 5a. Furthermore, the core assembly 5-0a includes a stationary core and a moving core, with the spring disposed between the stationary and moving cores. The push rod 5-1a is linked to the moving core.

[0084] Preferred, such as Figure 10 As shown, the coil 5-2a includes a coil body 5-20a and a first welding pin 5-21a and a second welding pin 5-22a connected to both ends of the coil body 5-20a, respectively. The first welding pin 5-21a and the second welding pin 5-22a are staggered relative to each other. The first welding pin 5-21a is welded to the magnetic yoke 5-3a and connected to the moving contact 8-1a via a welding flexible wire. The second welding pin 5-22a is welded to one end of the circuit breaker conductive plate 8b. The first welding pin 5-21a and the second welding pin 5-22a are welded to the magnetic yoke 5-3a and the circuit breaker conductive plate 8b, respectively, forming a reliable position for the coil 5-2a and facilitating the overall installation of the short-circuit protection mechanism 5a.

[0085] Preferred, such as Figure 1 and 2 As shown in Figures 9 and 1, the magnetic yoke 5-3a has a U-shaped structure with its opening facing the side wall of the base 1-1a. The opening of the U-shaped structure of the coil 5-2a faces the first partition 1-2a. The opening direction of the U-shaped structure of the magnetic yoke 5-3a is perpendicular to the opening direction of the U-shaped structure of the coil 5-2a, which helps to reduce the assembly space occupied by the short-circuit protection mechanism 5a.

[0086] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A circuit breaker, comprising a housing and a breaking electrode circuit disposed within the housing, the breaking electrode circuit comprising a push-button mechanism (2a), an electric operating device (3a), an operating mechanism (4a), a contact mechanism, and an arc-extinguishing chamber (6a); the housing comprising a base (1-1a) and a top cover (1-4a), the contact mechanism comprising a moving contact (8-1a) and a stationary contact (8-2a) for mutual engagement, the electric operating device (3a) comprising a motor (3-1a) and a gear set (3-2a); the push-button mechanism (2a) is driven and connected to the operating mechanism (4a), the motor (3-1a) is driven and engaged with the operating mechanism (4a) through the gear set (3-2a), the operating mechanism (4a) is driven and connected to the moving contact (8-1a); the arc-extinguishing chamber (6a) engages with the contact mechanism; Its features are: The circuit breaker further includes a first control circuit board (5-1b) and a second control circuit board (5-2b) stacked together. The motor (3-1a) and the first control circuit board (5-1b) are respectively mounted on the base (1-1a). The second control circuit board (5-2b) is located between the first control circuit board (5-1b) and the top cover (1-4a). The gear set (3-2a) is located between the second control circuit board (5-2b) and the top cover (1-4a). The first control circuit board (5-1b) includes a motor clearance opening at one end. The motor (3-1a) is located on one side of the first control circuit board (5-1b) within the motor clearance opening. The second control circuit board (5-2b) is located between the motor (3-1a) and the top cover (1-4a). The first control circuit board (5-1b) is used for automatic opening and closing control; The second control circuit board (5-2b) is used to determine the working state of the circuit breaker, which includes the closing state, the opening state and the tripping state; the circuit breaker also includes a first detection element (6-1b) and a second detection element (6-2b) respectively disposed on the second control circuit board (5-2b), which cooperate with the button mechanism (2a) and the gear set (3-2a) respectively; The housing also includes a first partition (1-2a) disposed between the base (1-1a) and the top cover (1-4a), and a first control circuit board (5-1b) disposed between the base (1-1a) and the first partition (1-2a); the operating mechanism (4a), the contact mechanism, and the arc extinguishing chamber (6a) are all disposed on the first partition (1-2a) and located between the first partition (1-2a) and the top cover (1-4a).

2. The circuit breaker according to claim 1, characterized in that: The housing also includes a second partition (1-3a) disposed between the base (1-1a) and the top cover (1-4a). The second partition (1-3a) is arranged side by side with the button mechanism (2a). The motor (3-1a) is disposed on the base (1-1a) and is limited between the base (1-1a) and the second partition (1-3a). The circuit breaking device further includes a first circuit breaking terminal (3-1b) and a second circuit breaking terminal (3-2b). A contact mechanism, an overload protection mechanism (7a), and a short-circuit protection mechanism (5a) are connected in series between the first circuit breaking terminal (3-1b) and the second circuit breaking terminal (3-2b). The circuit breaker also includes a through-circuit circuit disposed within the housing. The through-circuit circuit includes a through-circuit terminal block (1b) and a first through-circuit terminal (4-1b) and a second through-circuit terminal (4-2b) respectively connected to both ends of the through-circuit terminal block (1b). The first circuit breaking terminal... The terminal (3-1b), the first through terminal (4-1b), and the button mechanism (2a) are located at the same end of the housing. The second disconnect terminal (3-2b) and the second through terminal (4-2b) are arranged side by side at intervals at the other end of the housing. The first disconnect terminal (3-1b) is located on one side of the second partition (1-3a) and between the second partition (1-3a) and the base (1-1a). The first through terminal (4-1b) is located on the other side of the second partition (1-3a) and between the second partition (1-3a) and the top cover (1-4a).

3. The circuit breaker according to claim 1, characterized in that: In the gear set, the shafts of each gear pass through the second control circuit board (5-2b) and are fixed on the base (1-1a).

4. The circuit breaker according to claim 1, characterized in that: Both the first detection element (6-1b) and the second detection element (6-2b) are microswitches, and the arrangement directions of the first detection element (6-1b) and the second detection element (6-2b) are perpendicular.

5. The circuit breaker according to claim 4, characterized in that: The gear set (3-2a) includes a final stage drive gear (3-20a) that drives and cooperates with the operating mechanism (4a). A gear drive boss is provided on one side of the final stage drive gear (3-20a) and drives and cooperates with the second detection element (6-2b).

6. The circuit breaker according to claim 1, characterized in that: The circuit breaking device further includes a short-circuit protection mechanism (5a) and an overload protection mechanism (7a), which are driven and cooperate with the operating mechanism (4a). The operating mechanism (4a), contact mechanism, short-circuit protection mechanism (5a), overload protection mechanism (7a) and arc extinguishing chamber (6a) are respectively arranged on the first partition (1-2a) and are all located between the first partition (1-2a) and the upper cover (1-4a). The first control circuit board (5-1b) is arranged on the base (1-1a) between the base (1-1a) and the first partition (1-2a).

7. The circuit breaker according to claim 1, characterized in that: The first control circuit board (5-1b) includes a first sampling element (7-1b) and a second sampling element (7-2b); the circuit breaker also includes a direct-through circuit disposed in the housing, the direct-through circuit including a direct-through terminal block (1b); the first sampling element (7-1b) is connected to the stationary contact (8-2a), and the second sampling element (7-2b) is connected to the direct-through terminal block (1b).

8. The circuit breaker according to claim 7, characterized in that: The circuit breaking electrode circuit also includes an overload protection mechanism (7a), which includes a bimetallic strip (7-1a) connected to the stationary contact (8-2a).

9. The circuit breaker according to claim 1, characterized in that: The first control circuit board (5-1b) also includes a motor connection plug (7-5b), and the motor (3-1a) is connected to the motor connection plug (7-5b) through a connecting wire; the first control circuit board (5-1b) also includes an output signal terminal (7-4b), and the output signal terminal (7-4b) is located at the end of the first control circuit board (5-1b) away from the operating mechanism (4a).

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