CN216902754U - Circuit breaker - Google Patents

Abstract

The utility model discloses a circuit breaker, and relates to the technical field of low-voltage apparatuses. The utility model discloses a circuit breaker, which comprises a shell, and a boat-shaped handle, a switching-on/off mechanism, an input terminal and an output terminal which are arranged in the shell, wherein the boat-shaped handle drives the switching-on/off mechanism to switch on or off, the input terminal and the output terminal are respectively connected with the switching-on/off mechanism to form a conductive loop, the boat-shaped handle is positioned on one side of the shell, the input terminal and the output terminal are positioned on the other opposite side of the shell, and the switching-on/off mechanism is positioned between the boat-shaped handle and the output terminal. The circuit breaker provided by the utility model has the advantages of simple structure, small volume, high utilization rate of internal space, small closing angle and capability of being installed in a smaller space.

Description

Circuit breaker

Technical Field

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

Background

The distribution box is a distribution device which assembles switch equipment, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal or plastic shell according to the electrical wiring requirements. The functional area elements of the distribution box are usually connected with a circuit breaker to realize the functions of accessing, distributing, protecting and the like of an external power supply and realize the power supply of a load and the protection function of a power supply line.

The existing circuit breaker is large in size, the handle above the circuit breaker is of a rocker type, the moving space required during operation is large, the circuit breaker is not suitable for a power distribution box with small size, especially the power distribution box with a plurality of circuit breakers needing to be inserted side by side, and the operation space and the installation space reserved for the circuit breaker can be smaller. In addition, the existing circuit breaker does not have a signal output structure, and the on-off condition of the circuit breaker cannot be judged on a console.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circuit breaker, which aims to solve the technical problem that the existing circuit breaker occupies a large space.

The embodiment of the utility model is realized by the following steps:

the utility model provides a circuit breaker, its includes the casing and sets up ship type handle, closing and separating brake mechanism, input terminal and output terminal in the casing, ship type handle drive closing and separating brake mechanism closes the floodgate or divide the floodgate, input terminal and output terminal are connected with closing and separating brake mechanism respectively in order to form electrically conductive return circuit, ship type handle is located one side of casing, input terminal and output terminal are located the opposite side of casing, closing and separating brake mechanism is located between ship type handle and the output terminal.

Optionally, as an implementable manner, the boat-shaped handle is rotatably connected with the opening/closing brake mechanism through a connecting rod.

Optionally, as an implementable mode, the boat-shaped handle includes a boat-shaped body and an extension portion that are connected to each other, the boat-shaped body is rotatably disposed in the housing, the extension portion is connected to the opening and closing mechanism, a first surface of the boat-shaped body extends out of the housing, a recessed portion is disposed at a hull position of the boat-shaped body, the recessed portion is located on the first surface, and the extension portion is located on a second surface of the boat-shaped body, the second surface being opposite to the first surface.

Optionally, as an implementable mode, the lock further comprises a signal output mechanism for displaying the working state of the closing and opening lock mechanism, the signal output mechanism can be abutted against the boat-shaped handle, and the signal output mechanism and the boat-shaped handle are located on the same side of the shell and are sequentially arranged along the first direction.

Optionally, as an implementable manner, the signal output mechanism includes a circuit board, a signal port arranged on the circuit board, a spring, a first conductive pin and a second conductive pin, one end of the spring is connected to the first conductive pin, the other end of the spring is in contact with the second conductive pin in a natural state, the switching-on/switching-off mechanism is switched on, and the boat-shaped handle drives the spring to be separated from the second conductive pin.

Alternatively, as an implementable manner, the housing is provided with one side for fixing the input terminal and the output terminal in a sealing manner.

Optionally, as an implementable mode, the switching on/off mechanism includes a moving contact component and a static contact component which are matched with each other, the input terminal is connected with the static contact component, the output terminal is connected with the moving contact component, the moving contact component is located on the upper portion of one side of the casing, the static contact component is located in the middle of the casing, and the moving contact component and the static contact component are sequentially arranged along the first direction.

Optionally, as an implementable mode, the system further comprises a short-circuit protection mechanism for driving the opening and closing mechanism to open and close the lock, wherein the opening and closing mechanism is L-shaped, and the short-circuit protection mechanism is located in an area enclosed by the ship-shaped handle and the opening and closing mechanism.

Optionally, as an implementable mode, the device further comprises an overload protection mechanism, one end of the overload protection mechanism extends to the middle of the switching-on/off mechanism, the other end of the overload protection mechanism is connected with the output terminal, and the overload protection mechanism is heated and bent to drive the switching-on/off mechanism to switch off.

Optionally, as an implementable mode, still include explosion chamber and run-on plate, the one end of run-on plate extends to the explosion chamber, the other end extends to closing and separating the floodgate mechanism, ship type handle, closing and separating the floodgate mechanism, explosion chamber and run-on plate arrange along the second direction in proper order, explosion chamber and run-on plate are located between input terminal and the output terminal.

The embodiment of the utility model has the beneficial effects that:

the utility model provides a circuit breaker, which comprises a shell, and a boat-shaped handle, a switching-on/off mechanism, an input terminal and an output terminal which are arranged in the shell, wherein the boat-shaped handle drives the switching-on/off mechanism to switch on or off, the input terminal and the output terminal are respectively connected with the switching-on/off mechanism to form a conductive loop, the boat-shaped handle is positioned on one side of the shell, the input terminal and the output terminal are positioned on the other opposite side of the shell, and the switching-on/off mechanism is positioned between the boat-shaped handle and the output terminal. The circuit breaker is simple in structure, small in size, high in utilization rate of the internal space, small in closing angle and capable of being installed in a small space.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic diagram of an internal structure of a circuit breaker in an open state according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an internal structure of a circuit breaker in a closing state according to an embodiment of the present invention;

fig. 3 is an external schematic structural diagram of a circuit breaker according to an embodiment of the present invention in a first view;

fig. 4 is an external schematic structural diagram of a circuit breaker provided in an embodiment of the present invention in a second view angle.

Icon: 100-a circuit breaker; 110-a housing; 120-boat-shaped handle; 121-a boat-shaped body; 1211-a recess; 122-an extension; 131-a movable contact assembly; 132-a stationary contact assembly; 140-input terminals; 150-output terminal; 161-circuit board; 162-signal port; 163-a spring; 164-a first conductive pin; 165-a second conductive pin; 170-short circuit protection mechanism; 180-overload protection mechanism; 190-arc extinguishing chamber; 200-arc striking plate; 210-connecting rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a circuit breaker 100, as shown in fig. 1 and fig. 2, including a housing 110, and a boat handle 120, an opening and closing mechanism, an input terminal 140, and an output terminal 150 that are disposed in the housing 110, where the boat handle 120 drives the opening and closing mechanism to open or close a gate, the input terminal 140 and the output terminal 150 are respectively connected to the opening and closing mechanism to form a conductive loop, the boat handle 120 is located on one side of the housing 110, the input terminal 140 and the output terminal 150 are located on the other side of the housing 110, and the opening and closing mechanism is located between the boat handle 120 and the output terminal 150.

The input terminal 140 and the output terminal 150 are respectively connected to the closing and opening mechanism to form a conductive loop, and the boat-shaped handle 120 is drivingly connected to the closing and opening mechanism, so that the boat-shaped handle 120 can be driven by an external force, and the boat-shaped handle 120 drives the closing and opening mechanism to close or open a gate, thereby implementing the connection or disconnection of the conductive loop. When the boat-shaped handle 120 rotates clockwise or counterclockwise, the opening and closing mechanism can be driven to rotate counterclockwise or clockwise, and then opening or closing is realized. The boat-shaped handle 120 is adopted to directly drive the on-off brake mechanism, so that the structure of the circuit breaker 100 is simplified, and the space is saved. Specifically, as shown in fig. 1, the circuit breaker 100 is in an open state at this time, and as shown in fig. 2, the circuit breaker 100 is in a closed state at this time. When the circuit breaker 100 needs to be switched on, as shown in fig. 1, the boat-shaped handle 120 is driven to rotate anticlockwise, and the boat-shaped handle 120 further drives the switching-on/off mechanism to rotate clockwise until the position shown in fig. 2, so that the circuit breaker 100 is switched on; when the opening of the lock is needed, as shown in fig. 2, the boat-shaped handle 120 is driven to rotate clockwise, and the boat-shaped handle 120 further drives the opening and closing lock mechanism to rotate counterclockwise until the position shown in fig. 1, so that the opening of the circuit breaker 100 is realized.

When the breaker is arranged, the boat handle 120 may be located on one side of the housing 110, the input terminal 140 and the output terminal 150 may be located on the other side of the housing 110, the boat handle 120, the switching mechanism and the output terminal 150 are sequentially arranged along the second direction b, the input terminal 140 and the output terminal 150 are sequentially arranged along the first direction a, and the first direction a (the length direction) and the second direction b (the height direction) are perpendicular to each other, for example, as shown in fig. 1 and 3, the boat handle 120 is located in the middle of the upper side (the user side) of the housing 110, the structure of the boat handle 120 occupies a small installation space, and the switching angle is small, so that the breaker 100 is miniaturized, and the breaker 100 can be installed in a small space. As shown in fig. 1 and 4, the input terminal 140 and the output terminal 150 are both located at the lower edge of the housing 110, the input terminal 140 is located at the left side of the output terminal 150, and the switching mechanism is located at the upper right side of the housing 110. Thus, the size of the circuit breaker 100 in the height direction can be effectively reduced by the wiring form of the circuit breaker 100 which is formed and then drawn out, meanwhile, the input terminal 140 and the output terminal 150 are in the clamping connection form, the size of the circuit breaker 100 in the length direction can be reduced, and the circuit breaker 100 is convenient to miniaturize.

Alternatively, a flat button, similar in structure to the prior art switch, is used instead of the boat handle 120.

Optionally, the boat handle 120 is rotatably connected to the opening/closing mechanism through a connecting rod 210.

The boat-shaped handle 120 and the switching on/off lock mechanism are rotatably arranged on the shell 110, and two ends of the connecting rod 210 are rotatably connected with the boat-shaped handle 120 and the switching on/off lock mechanism respectively, so that the boat-shaped handle 120 can drive the switching on/off lock mechanism to rotate clockwise or anticlockwise through the connecting rod 210. As shown by the dotted line in fig. 1, the boat-shaped handle 120, the connecting rod 210 and the opening and closing mechanism together form a four-bar structure, and the boat-shaped handle 120 only needs to rotate by a small angle (15 ° -60 °), so that the normal opening and closing operation of the opening and closing mechanism can be realized, and the opening distance l between the moving contact and the fixed contact meets the design requirement of the circuit breaker 100.

Alternatively, as shown in fig. 1 and 2, the boat-shaped handle 120 includes a boat-shaped body 121 and an extension portion 122 that are connected to each other, the boat-shaped body 121 is rotatably disposed in the housing 110, the extension portion 122 is connected to the opening and closing mechanism, a first surface of the boat-shaped body 121 extends out of the housing 110, a recess 1211 is disposed at a position of a hull of the boat-shaped body 121, the recess 1211 is disposed on the first surface, and the extension portion 122 is disposed on a second surface of the boat-shaped body 121, opposite to the first surface.

The boat-shaped handle 120 includes a boat-shaped body 121 and an extension 122 connected to a lower surface (second surface) of the boat-shaped body 121, and a middle portion of an upper surface (first surface) of the boat-shaped body 121 is concavely disposed to form a boat-shaped structure with a low middle portion and two high ends. The boat-shaped body 121 is rotatably disposed on the housing 110, the upper surface of the boat-shaped body is located outside the housing 110 for switching on and off the brake, the lower surface of the boat-shaped body is fixedly connected to the extension portion 122, the extension portion 122 is connected to the switching on and off mechanism, and the boat-shaped body 121 drives the switching on and off mechanism to switch on or off the brake through the extension portion 122. Illustratively, the extension 122 is attached to a middle portion of the lower surface of the boat-shaped body 121.

Optionally, a notch is formed in the boat-shaped handle 120, and the notch is used for avoiding the brake closing and opening mechanism in the brake closing and opening process.

Alternatively, the case 110 is provided with one side for fixing the input terminal 140 and the output terminal 150 in a sealing manner. Thus, on the one hand, the electrical insulation performance between the positive electrode and the negative electrode can be increased, and on the other hand, the strength of the case 110 can be enhanced.

Optionally, as shown in fig. 1 and fig. 2, the circuit breaker 100 further includes a signal output mechanism for displaying a working state of the closing and opening mechanism, the signal output mechanism can be abutted against the boat-shaped handle 120, and the signal output mechanism and the boat-shaped handle 120 are located on the same side of the housing 110 and are sequentially arranged along the first direction.

The signal output mechanism and the boat handle 120 are located at the same side of the housing 110 and are sequentially arranged in the first direction a. Illustratively, as shown in fig. 3, the signal output mechanism is located at the upper left portion of the housing 110. The wiring form that advances after the circuit breaker 100 for the upper portion of casing 110 does not set up binding post, consequently, can make full use of this part space of signal output mechanism and ship type handle 120 set up the upper portion at casing 110 jointly, and then reduce the size of circuit breaker 100 in the direction of height, be convenient for the miniaturization of circuit breaker 100. The signal output mechanism outputs an open state signal of the circuit breaker 100 to the console so as to observe an operation state of each circuit breaker 100.

Optionally, the signal output mechanism includes a circuit board 161, a signal port 162 disposed on the circuit board 161, a spring 163, a first conductive pin 164, and a second conductive pin 165, one end of the spring 163 is connected to the first conductive pin 164, and the other end of the spring 163 is in contact with the second conductive pin 165 in a natural state, the closing and opening mechanism is closed, and the boat-shaped handle 120 drives the spring 163 to be separated from the second conductive pin 165.

The first conductive pin 164 and the second conductive pin 165 are electrically connected to the signal port 162 through copper wires in the circuit board 161, and the spring 163 is a medium for electrically connecting or disconnecting the first conductive pin 164 and the second conductive pin 165, so as to connect or disconnect a formed signal circuit. As shown in fig. 1, when the circuit breaker 100 is in the open state, one end of the spring 163 is fixedly connected to the first conductive pin 164, and the other end of the spring is in contact with the second conductive pin 165 in the natural state (state without external force), at this time, the signal circuit is turned on, and the signal port 162 outputs the open signal of the circuit breaker 100 to the console; as shown in fig. 2, when the circuit breaker 100 is in a closed state, one end of the spring 163 is fixedly connected to the first conductive pin 164, and the other end is separated from the second conductive pin 165 by the driving of the boat handle 120, at this time, the signal circuit is disconnected, and the signal port 162 outputs a closing signal of the circuit breaker 100 to the console.

When the signal port 162 is arranged, as shown in fig. 1 and fig. 2, the signal port 162 may be located at the edge of the upper portion of the housing 110, at the left side of the boat handle 120, and the signal port 162 may be exposed to the outside of the housing 110; the circuit board 161 is located at the upper left corner of the interior of the housing 110, at the left side of the boat handle 120; the first conductive pin 164, the spring 163 and the second conductive pin 165 are all located on the circuit board 161, wherein the second conductive pin 165 is located at the upper right corner of the circuit board 161 and close to the boat-shaped handle 120, the spring 163 is located at the left side of the second conductive pin 165, the first conductive pin 164 is located at the lower side of the spring 163, and the end of the spring 163, which is used for being in contact with the second conductive pin, extends to the lower side of the boat-shaped handle 120, so that when the boat-shaped handle 120 rotates counterclockwise, the end can be pressed downward.

Optionally, an address line is disposed in the signal port 162 to determine to which circuit breaker 100 the opening/closing signal belongs.

Optionally, as shown in fig. 1 and fig. 2, the switching mechanism includes a moving contact assembly 131 and a fixed contact assembly 132 that are matched with each other, the input terminal 140 is connected to the fixed contact assembly 132, the output terminal 150 is connected to the moving contact assembly 131, the moving contact assembly 131 is located at the upper portion of one side of the housing 110, the fixed contact assembly 132 is located at the middle portion of the housing 110, and the fixed contact assembly 132 and the moving contact assembly 131 are sequentially arranged along the first direction.

The input terminal 140 is connected to the fixed contact assembly 132, and the output terminal 150 is connected to the movable contact assembly 131, so that when the movable contact assembly 131 contacts the fixed contact assembly 132, the conductive loop is connected; when the movable contact assembly 131 is separated from the stationary contact assembly 132, the conductive circuit is disconnected. Moving contact component 131 is located the upper right corner of casing 110, and stationary contact component 132 is located the middle part of casing 110, and stationary contact component 132 and moving contact component 131 arrange along first direction a in proper order.

Optionally, the circuit breaker 100 further includes a short-circuit protection mechanism 170 for driving the opening and closing mechanism to open and close the gate, the opening and closing mechanism is L-shaped, and the short-circuit protection mechanism 170 is located in an area enclosed by the boat-shaped handle 120 and the opening and closing mechanism.

The closing and opening brake mechanism is L-shaped and is distributed in a U-shaped way with the ship-shaped handle 120, when the closing and opening brake mechanism is arranged, the short-circuit protection mechanism 170 can be arranged in the middle of the shell 110, and the ship-shaped handle 120 and the closing and opening brake mechanism are enclosed together to form an area. Illustratively, the switching-on/off brake mechanism includes a moving contact component 131 and a fixed contact component 132 that are matched with each other, the moving contact component 131 and the fixed contact component 132 are distributed in an L shape, the moving contact component 131 is connected with the boat-shaped handle 120, the fixed contact component 132 and the boat-shaped handle 120 are respectively located at two sides of the moving contact component 131, the short-circuit protection mechanism 170 is located between the boat-shaped handle 120 and the fixed contact component 132, and the left side of the moving contact component 131.

Optionally, the circuit breaker 100 further includes an arc extinguish chamber 190 and an arc striking plate 200, one end of the arc striking plate 200 extends to the arc extinguish chamber 190, the other end extends to the switching on/off mechanism, the boat-shaped handle 120, the switching on/off mechanism, the arc extinguish chamber 190 and the arc striking plate 200 are sequentially arranged along a second direction, and the arc extinguish chamber 190 and the arc striking plate 200 are located between the input terminal 140 and the output terminal 150.

During arrangement, the switching-on/off mechanism, the arc extinguish chamber 190 and the arc striking plate 200 can be sequentially arranged along the second direction b, the input terminal 140, the arc extinguish chamber 190 and the output terminal 150 are sequentially arranged along the first direction a, and the switching-on/off mechanism and the arc striking plate 200 jointly form an arc running channel, so that electric arcs between a moving contact and a static contact in the switching-on/off mechanism smoothly enter the arc extinguish chamber 190 along the arc running channel. Illustratively, the arc extinguishing chamber 190 is located at the right side of the input terminal 140, below the short-circuit protection mechanism 170, the arc striking plate 200 extends to a position close to the output terminal 150 along the first direction a at the bottom of the housing 110, and the end of the arc striking plate 200 is lifted up to be close to the movable contact of the opening and closing mechanism.

Optionally, the circuit breaker 100 further includes an overload protection mechanism 180, one end of the overload protection mechanism 180 extends to the middle of the switching on/off mechanism, and the other end of the overload protection mechanism 180 is connected to the output terminal 150, and the overload protection mechanism 180 is heated and bent to drive the switching on/off mechanism to switch off.

The output terminal 150 is connected with the on-off brake mechanism through the loading protection mechanism 180, the overload protection mechanism 180 and the boat-shaped handle 120 are respectively positioned on two opposite sides of the on-off brake mechanism, and the overload protection mechanism 180 is positioned between the on-off brake mechanism and the output terminal 150 so as to improve the reasonability of layout. The upper end of the overload protection mechanism 180 is raised to the middle of the switching-on/off mechanism, and the upper end is heated and bent to push the switching-on/off mechanism to switch off, so that the arm of force is shortened, and the space of the circuit breaker 100 in the height direction is further compressed. Illustratively, the overload protection mechanism 180 is connected to the switching on/off mechanism and the output terminal 150 by a flexible connection line.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The circuit breaker (100) is characterized by comprising a shell (110), a boat-shaped handle (120), an opening and closing mechanism, an input terminal (140) and an output terminal (150), wherein the boat-shaped handle (120), the opening and closing mechanism, the input terminal (140) and the output terminal (150) are arranged in the shell (110), the boat-shaped handle (120) drives the opening and closing mechanism to be opened or closed, the input terminal (140) and the output terminal (150) are respectively connected with the opening and closing mechanism to form a conductive loop, the boat-shaped handle (120) is located on one side of the shell (110), the input terminal (140) and the output terminal (150) are located on the other side opposite to the shell (110), and the opening and closing mechanism is located between the boat-shaped handle (120) and the output terminal (150).

2. The circuit breaker (100) of claim 1 wherein said boat handle (120) is pivotally connected to said opening/closing mechanism by a linkage (210).

3. The circuit breaker (100) of claim 1, wherein the boat handle (120) comprises a boat body (121) and an extension portion (122) connected to each other, the boat body (121) is rotatably disposed in the housing (110), the extension portion (122) is connected to the opening and closing mechanism, a first surface of the boat body (121) protrudes from the housing (110), a boat body of the boat body (121) is provided with a recess (1211), the recess (1211) is located on the first surface, and the extension portion (122) is located on a second surface of the boat body (121) opposite to the first surface.

4. The circuit breaker (100) of claim 1, further comprising a signal output mechanism for displaying the operating status of the opening/closing mechanism, wherein the signal output mechanism can be abutted against the boat-shaped handle (120), and the signal output mechanism and the boat-shaped handle (120) are located on the same side of the housing (110) and are sequentially arranged along a first direction.

5. The circuit breaker (100) according to claim 4, wherein the signal output mechanism comprises a circuit board (161), a signal port (162) disposed on the circuit board (161), a spring (163), a first conductive pin (164), and a second conductive pin (165), one end of the spring (163) is connected to the first conductive pin (164), the other end of the spring is naturally in contact with the second conductive pin (165), the closing and opening mechanism is closed, and the boat handle (120) drives the spring (163) to be separated from the second conductive pin (165).

6. The circuit breaker (100) of claim 1 wherein said housing (110) is configured to secure one side of said input terminal (140) and said output terminal (150) in a sealed arrangement.

7. The circuit breaker (100) of claim 1, wherein the switching mechanism comprises a moving contact assembly (131) and a fixed contact assembly (132) that are engaged with each other, the input terminal (140) is connected to the fixed contact assembly (132), the output terminal (150) is connected to the moving contact assembly (131), the moving contact assembly (131) is located at an upper portion of one side of the housing (110), the fixed contact assembly (132) is located at a middle portion of the housing (110), and the moving contact assembly (132) and the fixed contact assembly (131) are sequentially arranged along a first direction.

8. The circuit breaker (100) of claim 1, further comprising a short-circuit protection mechanism (170) for driving the opening and closing mechanism to open and close, wherein the opening and closing mechanism is L-shaped, and the short-circuit protection mechanism (170) is located in an area enclosed by the boat handle (120) and the opening and closing mechanism.

9. The circuit breaker (100) of claim 1, further comprising an overload protection mechanism (180), wherein one end of the overload protection mechanism (180) extends to the middle of the switching on/off mechanism, and the other end of the overload protection mechanism is connected to the output terminal (150), and the overload protection mechanism (180) is heated and bent to drive the switching on/off mechanism to open.

10. The circuit breaker (100) of claim 1, further comprising an arc extinguishing chamber (190) and an arc striking plate (200), wherein one end of the arc striking plate (200) extends to the arc extinguishing chamber (190) and the other end extends to the switching on/off mechanism, the boat handle (120), the switching on/off mechanism, the arc extinguishing chamber (190) and the arc striking plate (200) are sequentially arranged along a second direction, and the arc extinguishing chamber (190) and the arc striking plate (200) are located between the input terminal (140) and the output terminal (150).

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