breaker

Abstract

The present application relates to the technical field of low-voltage electrical equipment, and discloses a circuit breaker, including a housing, a handle, a static contact assembly, a moving contact assembly, a trip assembly, an iron core assembly, and an indication assembly; the handle is rotatably connected to the housing, and is transmission-connected to the trip assembly to actuate the trip assembly; the static contact assembly is magnetically coupled to the iron core assembly, so that at least a portion of the iron core assembly can move relative to the housing and actuate the trip assembly; the moving contact assembly is transmission-connected to the trip assembly, and can be driven to move away from or contact the static contact assembly; the indication assembly includes an indication member rotatably connected to the housing, the rotation axis of the indication member and the handle coincide, the indication member has an indication part, and the indication member is configured to be synchronously actuated when the iron core assembly actuates the trip assembly, so that the indication part indicates that the circuit breaker is in a first state or a second state. The circuit breaker disclosed in the present application can indicate the type of electrical fault, thereby improving the diagnostic efficiency of the cause of the line fault.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical equipment, and in particular to a circuit breaker. Background Art

[0002] Miniature circuit breakers, also known as micro circuit breakers (MCBs), are mainly used for line protection of terminal power distribution, that is, to disconnect the line when the system is overloaded or short-circuited to avoid line damage and ensure the personal safety of users. Miniature circuit breakers are one of the low-voltage components with the largest output and the widest application range in terminal electrical appliances.

[0003] The miniature circuit breakers in the related art usually do not have the function of indicating the fault type, that is, they cannot indicate whether the miniature circuit breaker disconnects the line due to a short circuit fault or an overload fault. Therefore, users usually cannot directly determine the type of electrical fault, which is not conducive to the rapid diagnosis of the cause of the line fault. Utility Model Content

[0004] In view of this, the present application provides a circuit breaker that can indicate the type of electrical fault and improve the efficiency of diagnosing the cause of the line fault.

[0005] This application specifically adopts the following technical solutions:

[0006] The embodiment of the present application provides a circuit breaker, which includes a housing, and a handle, a static contact assembly, a moving contact assembly, a trip assembly, an iron core assembly, and an indication assembly installed in an inner cavity of the housing;

[0007] The handle is rotatably connected to the housing and is transmission-connected to the trip assembly to actuate the trip assembly. The handle has an operating rod extending from the housing.

[0008] The stationary contact assembly is magnetically and electrically coupled to the core assembly so that at least a portion of the core assembly can move relative to the housing and actuate a trip assembly located on a moving path;

[0009] The moving contact assembly is in transmission connection with the trip assembly and can be driven when the trip assembly is actuated to move away from or contact the stationary contact assembly;

[0010] The indicating assembly includes an indicating member, which is rotatably connected to the housing, and the rotation axis of the indicating member coincides with the rotation axis of the handle, and the indicating member has an indicating portion, and the indicating member is configured to be synchronously actuated when the core assembly actuates the tripping assembly, so that the indicating portion indicates that the circuit breaker is in a first state or a second state, and the first state is different from the second state.

[0011] Optionally, the shell is provided with a first opening, and the first opening is communicated with the inner cavity of the shell;

[0012] The surface of the indicating portion facing the first opening has a first indicating area and a second indicating area, and the first indicating area and the second indicating area are arranged along the closing direction of the handle, wherein the first indicating area and the second indicating area are respectively exposed from the first opening corresponding to the circuit breaker being in the first state and the second state.

[0013] Optionally, the indicating member includes a rotating part, a first arm and a second arm, the rotating part is rotatably connected to the shell, the first arm and the second arm are respectively connected to the rotating part, an end of the first arm away from the rotating part is connected to the indicating part, and an end of the second arm away from the rotating part is located on the moving path of the core assembly.

[0014] Optionally, the core assembly comprises a sleeve member and a push rod member, the push rod member is inserted into the sleeve member, and a first end and a second end of the push rod member are respectively exposed from two sides of the sleeve member, and the first end and the second end are opposite to each other in the length direction of the push rod member;

[0015] The second arm of the indicator member is located between the first end of the push rod member and the sleeve, and contacts the first end;

[0016] The release assembly is located at a side of the second end of the top rod away from the first end and in contact with the second end;

[0017] The core assembly is configured to move in a direction from the first end to the second end of the push rod member to actuate the indicator member and the trip assembly when the current flowing through the stationary contact assembly exceeds a threshold value.

[0018] Optionally, a first limiting portion is provided on the shell, and a second limiting portion is provided on the indicating portion, and the first limiting portion cooperates with the second limiting portion so that the indicating member stops at a position in the first state where the first indicating area is exposed at the first opening, and stops at a position in the second state where the second indicating area is exposed at the first opening.

[0019] Optionally, the first limiting portion is a first protrusion, and the first protrusion is arranged on the inner wall of the shell and located at one side of the first opening;

[0020] The second limiting portion is a second protrusion, the second protrusion is located on the surface of the indicating portion facing the first opening, and the sum of the protrusion height of the first protrusion and the protrusion height of the second protrusion is greater than the distance between the indicating portion and the inner wall of the shell;

[0021] In the first state and the second state, the second protrusion is located on two opposite sides of the first protrusion respectively.

[0022] Optionally, the shell is provided with a second opening, the second opening is communicated with the inner cavity of the shell, and the second opening is spaced apart from the first opening, and the first limiting portion is located between the first opening and the second opening;

[0023] At least a part of the indicating portion is an elastic structure having elasticity in the opening direction of the second opening, the elastic structure corresponds to the position of the second opening in the second state, and the second limiting portion is located on the elastic structure;

[0024] The circuit breaker includes a reset assembly mounted in the second opening and actuatable to apply force to the resilient structure.

[0025] Optionally, the indicating assembly further comprises an elastic member, one end of which is connected to the housing, and the other end of which is connected to the second arm of the indicating member;

[0026] The elastic member is configured to apply elastic force to the second arm of the indicator member to drive the indicator member to rotate along the closing direction of the handle.

[0027] Optionally, a first fixing portion is provided on the inner wall of the housing, and the first fixing portion is located on a side of the indicator away from the trip assembly;

[0028] A second fixing portion is provided on the second arm of the indicator;

[0029] Two ends of the elastic member are elastically connected to the first fixing portion and the second fixing portion respectively, and the elastic member is in an elastically stretched state.

[0030] Optionally, the indicator has a first axial hole, and the handle has a second axial hole;

[0031] An installation shaft portion is provided on the inner wall of the shell, and the installation shaft portion passes through the first shaft hole and the second shaft hole, and the installation shaft portion is clearance-matched with the first shaft hole and the second shaft hole respectively.

[0032] The circuit breaker provided in the embodiment of the present application has a housing equipped with a handle, a static contact assembly, a moving contact assembly, an iron core assembly, a trip assembly and an indication assembly; the handle can rotate relative to the housing to switch between a closed position and an open position; an iron core assembly and a trip assembly are arranged between the static contact assembly and the moving contact assembly, the static contact assembly is magnetically and electrically coupled to the iron core assembly, the moving contact assembly is transmission-connected to the trip assembly, and the trip assembly is also connected or matched with the handle and the iron core assembly respectively to accept actuation and drive the moving contact assembly to contact or move away from the static contact assembly; the indication assembly cooperates with the iron core assembly and can be synchronously actuated when the iron core assembly actuates the trip assembly to indicate the current state of the circuit breaker. When the circuit breaker provided by the embodiment of the present application is in use, if the circuit connected to the circuit breaker is normally conductive, the handle is in the closed position, the moving contact assembly is in contact with the static contact assembly and conductive, and the indicator indicates that the circuit breaker is in the first state; if a short circuit occurs in the circuit connected to the circuit breaker, a large current passes through the static contact assembly, the core assembly moves based on magnetoelectric coupling, and actuates the trip assembly and the indication assembly to operate, on the one hand, the trip assembly drives the moving contact assembly away from the static contact assembly, thereby disconnecting the circuit for protection, and at the same time drives the handle to rotate to the open position, on the other hand, the indication assembly rotates relative to the housing, thereby indicating that the circuit breaker is in the second state; if the circuit connected to the circuit breaker is overloaded, since the overload current is much smaller than the short-circuit current and is not enough to actuate the core assembly to move, the indication assembly still indicates that the circuit breaker is in the first state, but the overload current will cause the trip assembly to operate, and drive the moving contact assembly away from the static contact assembly, thereby disconnecting the circuit for protection, and at the same time drive the handle to rotate to the open position. Therefore, by observing the circuit breaker status indicated by the indicator and the position of the handle, the user can determine whether the circuit connected to the circuit breaker is normally conducting, short-circuited, or overloaded. In other words, the circuit breaker provided in the embodiment of the present application can indicate the type of electrical fault, thereby improving the efficiency of diagnosing the cause of the line fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 is an exploded diagram of a circuit breaker provided in an embodiment of the present application;

[0035] Figure 2 is a structural schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0036] Figure 3It is a structural schematic diagram of an indicator provided in an embodiment of the present application;

[0037] Figure 4 It is an assembly diagram of a stationary contact assembly, an iron core assembly, a trip assembly, a moving contact assembly, an indication assembly and a handle provided in an embodiment of the present application;

[0038] Figure 5 is a schematic diagram of the internal structure of a circuit breaker provided in an embodiment of the present application in a first state;

[0039] Figure 6 yes Figure 5 The schematic diagram of the internal structure of the circuit breaker shown is when the handle is moved to the opening position;

[0040] Figure 7 is a schematic diagram of the internal structure of a circuit breaker provided in an embodiment of the present application in a second state;

[0041] Figure 8 It is a schematic diagram of the coordination structure of the reset assembly and the elastic structure provided in an embodiment of the present application;

[0042] Fig. 9 is a schematic diagram of the structural arrangement of the elastic member provided in an embodiment of the present application;

[0043] Fig.10 It is a schematic diagram of the assembly of the handle and the indicator in the circuit breaker provided in the embodiment of the present application.

[0044] Reference numerals:

[0045] 1. Shell; 11. First opening; 12. First limiting portion; 121. First protrusion; 13. Second opening; 14. First fixing portion; 15. Mounting shaft portion; 16. Third opening;

[0046] 2. Handle; 21. Operating rod; 22. Second shaft hole;

[0047] 3. Stationary contact assembly; 31. Stationary contact; 32. Coil;

[0048] 4. Moving contact assembly;

[0049] 5. Trip assembly;

[0050] 6. Iron core assembly; 61. Sleeve member; 62. Top rod member; 621. First end; 622. Second end; 63. Stop member;

[0051] 7. Indicator assembly; 71. Indicator; 711. Indicator portion; 7111. First indicator area; 7112. Second indicator area; 7113. Elastic structure; 712. Rotating portion; 7121. First shaft hole; 713. First arm; 714. Second arm; 715. Second limiting portion; 7151. Second protrusion; 716. Second fixing portion; 717. Contact portion; 72. Elastic member;

[0052] 8. Reset component; 81. Button component; 82. Elastic component. DETAILED DESCRIPTION

[0053] In order to make the technical solutions and advantages of the present application more clear, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0054] The present application embodiment provides a circuit breaker, such as Figure 1 As shown, the circuit breaker includes a housing 1, and a handle 2, a static contact assembly 3, a moving contact assembly 4, a trip assembly 5, a core assembly 6 and an indication assembly 7 installed on the housing 1, wherein the static contact assembly 3, the moving contact assembly 4, the trip assembly 5 and the core assembly 6 are all accommodated in the inner cavity of the housing 1.

[0055] The handle 2 can control the on and off of the circuit breaker. Specifically, the handle 2 is rotatably mounted on the housing 1, and the handle 2 includes an operating rod 21, at least a portion of which extends from the housing 1 to receive external braking. The user can rotate the handle 2 by pulling or toggling the operating rod 21, thereby switching the handle 2 between the closing position and the opening position. Figure 5 As shown, when the handle 2 is in the closing position, the static contact assembly 3 is in contact with the moving contact assembly 4, so the circuit connected to the circuit breaker is turned on; Figure 7 As shown, when the handle 2 is in the opening position, the static contact assembly 3 is separated from the moving contact assembly 4, so the circuit connected to the circuit breaker is disconnected. The handle 2 is also in transmission connection with the trip assembly 5, so that the trip assembly 5 can be actuated as the handle 2 rotates, and the trip assembly 5 is further in transmission connection with the moving contact assembly 4, so that the moving contact assembly 4 can be driven to move toward or away from the static contact assembly 3 as the trip assembly 5 moves.

[0056] Continue to see Figure 1 The stationary contact assembly 3 is fixed on the housing 1, and the stationary contact assembly 3 can be magnetically coupled with the core assembly 6, so that at least a portion of the core assembly 6 can move relative to the housing 1. The trip assembly 5 is located on the moving path of the moving part of the core assembly 6, so the core assembly 6 can actuate the trip assembly 5 when it moves, thereby triggering the trip assembly 5 to drive the moving contact assembly 4 away from the stationary contact assembly 3.

[0057] The moving contact assembly 4 is movably mounted on the housing 1, so on the one hand, the moving contact assembly 4 can be driven by the trip assembly 5 to leave the first position in contact with the static contact assembly 3, so that the electrical connection between the moving contact assembly 4 and the static contact assembly 3 is disconnected, and the circuit connected to the circuit breaker is disconnected; on the other hand, the moving contact assembly 4 can also be driven by the trip assembly 5 to move from the second position away from the static contact assembly 3 to the first position, so that the moving contact assembly 4 and the static contact assembly 3 are electrically connected, and the circuit connected to the circuit breaker is connected.

[0058] The indicator component 7 is used to display the current state of the circuit breaker, so that the user can judge the working state of the circuit breaker and the fault type of the circuit connected to the circuit breaker. Figure 1 As shown, the indicating assembly 7 includes an indicating member 71, which is rotatably connected to the housing 1, and the rotation axis of the indicating member 71 coincides with the rotation axis of the handle 2; the indicating member 71 has an indicating portion 711, and the indicating portion 711 has an indicating function. The core assembly 6 will actuate the trip assembly 5 and the indicating member 71 during the movement, so that the indicating portion 711 can indicate whether the circuit breaker is in the first state or the second state, wherein the first state and the second state represent different states. In simple terms, the first state can be understood as a non-short-circuit fault state, which means that the circuit connected to the circuit breaker may be normally conducting, or may have other faults other than short-circuit faults, such as overload faults; the second state is a short-circuit fault state, which means that a short-circuit fault has occurred in the circuit connected to the circuit breaker.

[0059] The following is an introduction to the indication principles of the circuit breaker provided in the embodiments of the present application in several situations:

[0060] The first case: Figure 5 As shown, if the circuit connected to the circuit breaker provided in the embodiment of the present application is normally conductive, the handle 2 of the circuit breaker is in the closed position, the moving contact assembly 4 and the static contact assembly 3 are in contact with each other, and the indicator 71 indicates that the circuit breaker is in the first state.

[0061] The second case: Figure 7 As shown, if a short circuit occurs in the circuit connected to the circuit breaker provided in the embodiment of the present application, a large current instantaneously passes through the static contact assembly 3. Based on the magnetoelectric coupling effect, the core assembly 6 moves and respectively actuates the trip assembly 5 and the indication assembly 7 to act. After the trip assembly 5 is actuated, on the one hand, it drives the moving contact assembly 4 to move away from the static contact assembly 3, thereby disconnecting the circuit and playing a protective role. On the other hand, it drives the handle 2 to rotate from the closed position to the open position. After being actuated, the indication assembly 7 rotates relative to the housing 1, thereby changing the state indication of the circuit breaker, that is, changing from indicating that the circuit breaker is in the first state to indicating that the circuit breaker is in the second state.

[0062] The third situation: if an overload fault occurs in the circuit connected to the circuit breaker provided in the embodiment of the present application, since the overload current is much smaller than the short-circuit current, the overload current passing through the static contact assembly 3 is insufficient to actuate the core assembly 6 to move, so the state indication of the indicator 71 remains unchanged, still indicating that the circuit breaker is in the first state. At the same time, the overload current in the static contact assembly 3 will cause the trip assembly 5 to operate, which will drive the moving contact assembly 4 to move away from the static contact assembly 3, thereby disconnecting the circuit and playing a protective role, and on the other hand, it will drive the handle 2 to rotate from the closing position to the opening position.

[0063] Based on the above indication principle, the user can judge whether the circuit connected to the circuit breaker is normally on, has a short circuit fault, or has an overload fault by observing the circuit breaker state indicated by the indication part 711 and the position of the handle 2, wherein in the case of normal conduction, the indication part 711 indicates the first state and the handle 2 is in the closed position; in the case of a short circuit fault, the indication part 711 indicates the second state and the handle 2 is in the open state; in the case of an overload fault, the indication part 711 indicates the first state and the handle 2 is in the open position. Therefore, the circuit breaker provided in the embodiment of the present application can not only indicate the on and off of the circuit, but also further indicate the type of electrical fault when the circuit fails, so that the user can quickly diagnose and determine the cause of the line fault, thereby improving the diagnostic efficiency and subsequent maintenance efficiency.

[0064] It should be noted that, in the embodiment of the present application, the trip assembly 5 can be actuated under the external actuation applied by the handle 2 and the core assembly 6, thereby driving the moving contact assembly 4 to move, and can also be actuated under the magnetoelectric coupling of the current, thereby driving the moving contact assembly 4 to move. Exemplarily, the trip assembly 5 includes a metal part, and when the current in the circuit connected to the circuit breaker is overloaded (i.e., exceeds the rated current), the metal part undergoes flexural deformation to actuate the trip assembly 5, so that the trip assembly 5 drives the handle 2 to move from the closing position to the opening position, and drives the moving contact assembly 4 away from the static contact assembly 3.

[0065] In some embodiments of the present application, Figure 2 As shown, the shell 1 is provided with a first opening 11, and the first opening 11 is connected to the inner cavity of the shell 1; the surface of the indicating portion 711 facing the first opening 11 has a first indicating area 7111 and a second indicating area 7112, and the first indicating area 7111 and the second indicating area 7112 are arranged along the closing direction of the handle 2, wherein the first indicating area 7111 and the second indicating area 7112 are respectively exposed from the first opening 11 corresponding to the circuit breaker being in the first state and the second state.

[0066] The housing 1 is provided with a first opening 11, through which the user can observe the indicator 711 to determine the state indicated by the indicator 711. Figure 2 and Figure 3 As shown, the surface of the indicator portion 711 facing the first opening 11 has a first indicator area 7111 and a second indicator area 7112, the first indicator area 7111 and the second indicator area 7112 are arranged along the closing direction of the handle 2, and the first indicator area 7111 and the second indicator area 7112 have different visual expressions. For example, the first indicator area 7111 and the second indicator area 7112 have different colors, or the first indicator area 7111 and the second indicator area 7112 have different marks, patterns or textures, or the first indicator area 7111 and the second indicator area 7112 have different structures, etc. When the user observes the first indicator area 7111 through the first opening 11, it means that the circuit breaker is in the first state; when the user observes the second indicator area 7112 through the first opening 11, it means that the circuit breaker is in the second state.

[0067] It should be noted that in the embodiment of the present application, the closing direction refers to the rotation direction of the handle 2 during the process of rotating from the opening position to the closing position; similarly, the opening direction refers to the rotation direction of the handle 2 during the process of rotating from the closing position to the opening position. The closing direction and the opening direction are opposite, for example, one can be clockwise and the other can be counterclockwise.

[0068] It should also be noted that, in the embodiments of the present application, a structure “exposed from an opening” includes both a situation where the structure extends from one side of the opening to the other side and a situation where the structure is only located on one side or inside the opening and the user can see the structure when the user's eyes are facing the opening.

[0069] In some embodiments of the present application, see Figure 3 The indicating member 71 includes a rotating part 712, a first arm 713 and a second arm 714. The rotating part 712 is rotatably connected to the shell 1. The first arm 713 and the second arm 714 are respectively connected to the rotating part 712. One end of the first arm 713 away from the rotating part 712 is connected to the indicating part 711. One end of the second arm 714 away from the rotating part 712 is located on the moving path of the core assembly 6.

[0070] The indicator 71 is rotatably connected to the housing 1 via the rotating portion 712. For example, Fig.10 As shown, the rotating portion 712 has a first axial hole 7121, and a mounting shaft portion 15 is provided on the inner wall of the shell 1. The mounting shaft portion 15 passes through the first axial hole 7121, and there is a clearance fit between the first axial hole 7121 and the mounting shaft portion 15, so that the indicator 71 can rotate relative to the shell 1.

[0071] Optionally, the handle 2 is coaxially arranged with the indicator 71. Fig.10 The handle 2 has a second shaft hole 22, and the mounting shaft portion 15 passes through the second shaft hole 22, and there is a clearance fit between the second shaft hole 22 and the mounting shaft portion 15, so that the handle 2 can rotate relative to the housing 1. Since both the first shaft hole 7121 and the second shaft hole 22 are matched with the mounting shaft portion 15, the indicator 71 can be directly installed near the handle 2 and share the same mounting shaft portion 15 with the handle 2 without having to install or set the shaft separately, thereby reducing the occupation of the layout space in the housing 1.

[0072] See also Figure 1 and Figure 3 The first arm 713 and the second arm 714 of the indicator 71 are respectively connected to the outer peripheral wall of the rotating part 712, and there is a gap between the first arm 713 and the second arm 714, wherein the first arm 713 extends in the direction close to the first opening 11 and is connected to the indicator 711; the second arm 714 extends in the direction close to the core assembly 6 and is located on the moving path of the moving part of the core assembly 6 to facilitate actuation. When the core assembly 6 moves, the second arm 714 is subjected to force and causes the indicator 71 to rotate as a whole, so that the first indication area 7111 and the second indication area 7112 on the indicator 711 are switched.

[0073] Alternatively, if Figure 3 As shown, the extension length of the second arm 714 is greater than the extension length of the first arm 713, thereby amplifying the rotational torque of the core assembly 6 on the indicator 71. On the one hand, it reduces the requirement for the movement of the core assembly 6 and the moving space occupied by the core assembly 6 inside the shell 1. On the other hand, it improves the switching speed from the first indication area 7111 to the second indication area 7112 and reduces the rotational space occupied by the indicator 711 inside the shell 1.

[0074] In some embodiments of the present application, Figure 4As shown, the core assembly 6 includes a sleeve member 61 and a push rod member 62. The sleeve member 61 has a through hole inside. The push rod member 62 is located in the through hole and penetrates the sleeve member 61. The push rod member 62 has a first end 621 and a second end 622 opposite to each other in the length direction. The first end 621 and the second end 622 are exposed from both sides of the sleeve member 61, respectively. The length direction of the push rod member 62 is parallel to the axial direction of the sleeve member 61, and the push rod member 62 can move in the through hole of the sleeve member 61 along the length direction. There is a gap between the first end 621 of the push rod member 62 and the sleeve member 61. The second arm 714 of the indicator 71 is located in the gap and contacts the first end 621 of the push rod member 62. The second end 622 of the push rod member 62 contacts or has a gap with the sleeve member 61. The release assembly 5 is located on the side of the second end 622 of the push rod member 62 away from the first end 621, and the release assembly 5 contacts the second end 622. Among them, when the current flowing through the static contact assembly 3 exceeds the threshold value, the top rod member 62 moves in the direction from the first end 621 to the second end 622 of the top rod member 62 based on the magneto-electric coupling with the static contact assembly 3, so that the first end 621 actuates the indicator member 71 to rotate, so that the second end 622 actuates the trip assembly 5 to operate.

[0075] Optionally, continue to see Figure 4 The static contact assembly 3 includes a static contact 31 and a coil 32. The static contact 31 is electrically connected to the coil 32. The coil 32 is wound on the sleeve 61 of the core assembly 6. When current passes through the static contact assembly 3, the current in the coil 32 will be magnetically coupled with the metal push rod 62 of the core assembly 6, thereby causing the push rod 62 to have a tendency to move. If the current flowing through the static contact assembly 3 is small, it is not enough to overcome the friction force on the push rod 62, and the push rod 62 does not move; if the current flowing through the static contact assembly 3 is greater than the threshold, the push rod 62 overcomes the friction force and moves.

[0076] Optionally, in the absence of external actuation, such as Figure 5 As shown, the distance between the first end 621 of the push rod 62 and the sleeve 61 is greater than the distance between the second end 622 of the push rod 62 and the sleeve 61; Figure 6 As shown, when the push rod 62 moves in based on the magneto-electric coupling effect, the distance between the first end 621 of the push rod 62 and the sleeve 61 decreases, and the distance between the second end 622 of the push rod 62 and the sleeve 61 increases.

[0077] For example, see Figure 4The core assembly 6 also includes a stopper 63, which is located at the first end 621 of the top rod 62, connected to the outer wall of the top rod 62, and abutted against the second arm 714 of the indicator 71 to increase the contact area between the indicator 71 and the core assembly 6, thereby ensuring the reliability of the core assembly 6 in actuating the indicator 71.

[0078] Optionally, continue to see Figure 4 The indicator member 71 further includes a contact portion 717, which is connected to a bending end of the second arm 714 away from the rotating portion 712, and the contact portion 717 is in surface contact with the baffle member to ensure contact reliability.

[0079] In some embodiments of the present application, Figure 5 and Figure 7 As shown, a first limiting portion 12 is provided on the shell 1, and a second limiting portion 715 is provided on the indicating portion 711. The first limiting portion 12 cooperates with the second limiting portion 715 so that the indicating member 71 stops at a position in the first state such that the first indicating area 7111 is exposed to the first opening 11, and stops at a position in the second state such that the second indicating area 7112 is exposed to the first opening 11.

[0080] The first limiting portion 12 and the second limiting portion 715 cooperate with each other to ensure, on the one hand, that the first indication area 7111 of the indicating portion 711 is exposed from the first opening 11 in the first state, and the second indication area 7112 will not be exposed from the first opening 11 in the absence of external force; and on the other hand, to ensure that the second indication area 7112 of the indicating portion 711 is exposed from the first opening 11 in the second state, and the first indication area 7111 will not be exposed from the first opening 11 in the absence of external force, thereby achieving a one-to-one correspondence between the first state and the second state of the first indicating area 7111 and the second state of the indicating portion 711, thereby ensuring the accuracy of indication.

[0081] In some embodiments of the present application, the first limiting portion 12 and the second limiting portion 715 are both protruding, and the protruding directions are opposite. Figure 5 and Figure 7As shown, the first limiting portion 12 is a first protrusion 121, which is arranged on the inner wall of the shell 1 and is located on one side of the first opening 11, and the first protrusion 121 protrudes in the direction close to the indicating portion 711; the second limiting portion 715 is a second protrusion 7151, and the second protrusion 7151 is arranged on the surface of the indicating portion 711 facing the first opening 11, and the second protrusion 7151 protrudes in the direction of the shell wall where the first opening 11 is located; wherein the sum of the protruding height of the first protrusion 121 and the protruding height of the second protrusion 7151 is greater than the distance between the indicating portion 711 and the inner wall of the shell 1, so when the indicating member 71 rotates relative to the shell 1, the first protrusion 121 will abut against the second protrusion 7151, thereby preventing the indicating member 71 from continuing to rotate relative to the shell 1.

[0082] In this embodiment, if Figure 5 As shown, when the circuit breaker is in the first state, the second protrusion 7151 is located on one side of the first protrusion 121; Figure 7 As shown, when the circuit breaker is in the second state, the second protrusion 7151 is located on the other side of the first protrusion 121. Exemplarily, the first indication area 7111 of the indication part 711 is located on one side of the first protrusion 121, and the second indication area 7112 is located on the side of the first indication area 7111 away from the first protrusion 121; when the circuit breaker is in the first state, the second protrusion 7151 is located on the side of the first protrusion 121 close to the first opening 11, and the first indication area 7111 closer to the second protrusion 7151 is exposed from the first opening 11; when the circuit breaker is in the second state, the indicator 71 rotates under external actuation to make the second protrusion 7151 pass over the first protrusion 121, so that the second protrusion 7151 is located on the side of the first protrusion 121 away from the first opening 11, and the second indication area 7112 farther from the second protrusion 7151 is exposed from the first opening 11.

[0083] In some embodiments of the present application, Figure 8As shown, the housing 1 is provided with a second opening 13, the second opening 13 is connected to the inner cavity of the housing 1, and the second opening 13 and the first opening 11 are located on the same side wall of the housing 1 and are spaced from each other, and the first limiting portion 12 is located between the first opening 11 and the second opening 13; at least a portion of the indicating portion 711 is an elastic structure 7113, and the elastic structure 7113 is elastic in the opening direction of the second opening 13, and the second limiting portion 715 is located on the elastic structure 7113, wherein after the indicating member 71 is actuated and rotated by the core assembly 6, that is, when the circuit breaker is in the second state, the elastic structure 7113 corresponds to the position of the second opening 13. It should be noted that the position of the elastic structure 7113 corresponds to the position of the second opening 13, which means that the orthographic projection of at least a portion of the elastic structure 7113 on the opening plane of the second opening 13 has an overlapping area with the second opening 13, and the opening plane of the second opening 13 is a plane passing through the center of the second opening 13 and perpendicular to the axis of the second opening 13.

[0084] Continue to see Figure 8 The circuit breaker includes a reset assembly 8, which is installed in the second opening 13 and can be actuated to apply force to the elastic structure 7113. Therefore, the elastic structure 7113 can be elastically deformed after being subjected to force, so that the second protrusion 7151 and the first protrusion 121 are offset from each other, and the indicator 71 can return to the position before the rotation to achieve reset.

[0085] In some embodiments, see Figure 8 The reset assembly 8 includes an elastic member 82 and a button member 81. The elastic member 82 is elastically connected to the housing 1 to provide elastic force in the opening direction of the second opening 13. The button member 81 is located in the second opening 13 and can move in the second opening 13 along the opening direction. The button member 81 is connected to the elastic member 82. When the circuit breaker is in the second state, the user can press the button member 81 to actuate the elastic structure 7113 of the indicator 71 to reset, and after the user removes the pressing force, the button member 81 automatically returns to its original position under the elastic action of the elastic member 82.

[0086] Optionally, the elastic member 82 is a metal spring, one end of which is connected to the housing 1 and the other end is suspended in the air, and the button member 81 is connected to the suspended end of the metal spring.

[0087] In some embodiments of the present application, see Figure 2The housing 1 is also provided with a third opening 16, which is in communication with the inner cavity. The operating rod 21 of the handle 2 extends out of the housing 1 through the third opening 16 and can rotate in the third opening 16. The third opening 16 and the first opening 11 can be connected or spaced apart; the third opening 16 and the second opening 13 can be connected or spaced apart. Exemplarily, as shown in the figure, the third opening 16 is in communication with the first opening 11 and the second opening 13, respectively.

[0088] Optionally, the first opening 11 is located at a middle position of the third opening 16 in the length direction, so that the third opening 16 and the first opening 11 are oriented in the same direction.

[0089] In some embodiments of the present application, Figures 5 to 7 As shown, the indicating assembly 7 also includes an elastic member 72, one end of the elastic member 72 is connected to the housing 1, and the other end is connected to the second arm 714 of the indicating member 71, and the elastic member 72 is configured to apply elastic force to the second arm 714 of the indicating member 71 to drive the indicating member 71 to rotate along the closing direction of the handle 2.

[0090] By providing the elastic member 72, on the one hand, when the circuit breaker is normally turned on, the second arm 714 of the indicator 71 maintains contact with the core assembly 6; on the other hand, after the indicating portion 711 of the indicator 71 is actuated by the reset assembly 8, the indicator 71 is reset to facilitate the next detection indication.

[0091] In some embodiments of the present application, Fig. 9 As shown, a first fixing portion 14 is provided on the inner wall of the shell 1, and the first fixing portion 14 is located on the side of the indicator 71 away from the trip assembly 5, and a second fixing portion 716 is provided on the second arm 714 of the indicator 71; the two ends of the elastic member 72 are elastically connected to the first fixing portion 14 and the second fixing portion 716 respectively, and the elastic member 72 is in an elastically stretched state.

[0092] For example, see Fig. 9 The first fixing part 14 is a fixing column protruding from the inner wall of the housing 1, and the second fixing part 716 is a hanging rod connected to the second arm 714; the elastic member 72 is a compression spring, and both ends of the compression spring have hooks, so that the compression spring is respectively hung on the fixing column and the hanging rod through the hooks at both ends to achieve installation and fixation inside the housing 1. The compression spring is always in a stretched state, and the stretching amount of the compression spring when the circuit breaker is in the first state is less than the stretching amount of the compression spring when the circuit breaker is in the second state.

[0093] In some embodiments of the present application, Fig.10As shown, the indicator 71 is coaxially arranged with the handle 2. On the one hand, the indicator 71 does not need to occupy additional space inside the housing 1. On the other hand, the rotation space of the indicator 71 at least partially overlaps with the rotation space of the handle 2, thereby reducing the occupation of the rotation space of the housing 1 by the indicator 71. Exemplarily, the indicator 71 has a first shaft hole 7121, the handle 2 has a second shaft hole 22, and a mounting shaft portion 15 is provided on the inner wall of the housing 1, wherein the mounting shaft portion 15 penetrates the first shaft hole 7121 and the second shaft hole 22, and the mounting shaft portion 15 is clearance-matched with the first shaft hole 7121 and the second shaft hole 22, respectively.

[0094] In summary, when the circuit breaker provided in the embodiment of the present application is in use, the user can judge whether the circuit connected to the circuit breaker is normally conducting, has a short circuit fault, or has an overload fault by observing the circuit breaker state indicated by the indicator 711 and the position of the handle 2. Therefore, the circuit breaker provided in the embodiment of the present application can indicate the type of electrical fault, thereby improving the efficiency of diagnosing the cause of the line fault.

[0095] In the present application, it should be understood that the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0096] The above description is only for the purpose of facilitating those skilled in the art to understand the technical solution of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker, characterized in that: The circuit breaker comprises a housing (1), and a handle (2), a stationary contact assembly (3), a moving contact assembly (4), a trip assembly (5), an iron core assembly (6) and an indication assembly (7) installed in an inner cavity of the housing (1); The handle (2) is rotatably connected to the housing (1) and is transmission-connected to the trip assembly (5) to actuate the trip assembly (5), and the handle (2) has an operating rod (21) extending from the housing (1); The stationary contact assembly (3) is magnetically and electrically coupled to the iron core assembly (6) so that at least a portion of the iron core assembly (6) can move relative to the housing (1) and actuate a trip assembly (5) located on a moving path; The moving contact assembly (4) is transmission-connected to the trip assembly (5), and can be driven when the trip assembly (5) is actuated to move away from or contact the stationary contact assembly (3); The indicating assembly (7) comprises an indicating member (71), the indicating member (71) being rotatably connected to the housing (1), and the rotation axis of the indicating member (71) coincides with the rotation axis of the handle (2), the indicating member (71) having an indicating portion (711), the indicating member (71) being configured to be synchronously actuated when the core assembly (6) actuates the tripping assembly (5), so that the indicating portion (711) indicates that the circuit breaker is in a first state or a second state, the first state being different from the second state.

2. The circuit breaker according to claim 1, characterized in that: The shell (1) is provided with a first opening (11), and the first opening (11) is communicated with the inner cavity of the shell (1); The surface of the indicating portion (711) facing the first opening (11) comprises a first indicating area (7111) and a second indicating area (7112), wherein the first indicating area (7111) and the second indicating area (7112) are arranged along the closing direction of the handle (2), wherein the first indicating area (7111) and the second indicating area (7112) are respectively exposed from the first opening (11) corresponding to the circuit breaker being in the first state and the second state.

3. The circuit breaker according to claim 2, characterized in that: The indicating member (71) comprises a rotating part (712), a first arm (713) and a second arm (714); the rotating part (712) is rotatably connected to the housing (1); the first arm (713) and the second arm (714) are respectively connected to the rotating part (712); an end of the first arm (713) away from the rotating part (712) is connected to the indicating part (711); and an end of the second arm (714) away from the rotating part (712) is located on a moving path of the core assembly (6).

4. The circuit breaker according to claim 3, characterized in that: The core assembly (6) comprises a sleeve member (61) and a push rod member (62), wherein the push rod member (62) is inserted into the sleeve member (61), and a first end (621) and a second end (622) of the push rod member (62) are respectively exposed from two sides of the sleeve member (61), and the first end (621) and the second end (622) are opposite to each other in the length direction of the push rod member (62); The second arm (714) of the indicator member (71) is located between the first end (621) of the push rod member (62) and the sleeve member (61), and is in contact with the first end (621); The release assembly (5) is located on a side of the second end (622) of the top rod (62) away from the first end (621), and is in contact with the second end (622); The core assembly (6) is configured to move in a direction from a first end (621) to a second end (622) of the top rod (62) to actuate the indicator (71) and the trip assembly (5) when the current flowing through the static contact assembly (3) exceeds a threshold value.

5. The circuit breaker according to claim 3, characterized in that: The shell (1) is provided with a first limiting portion (12), and the indicating portion (711) is provided with a second limiting portion (715), and the first limiting portion (12) cooperates with the second limiting portion (715) so that the indicating member (71) stops at a position in the first state where the first indicating area (7111) is exposed at the first opening (11), and stops at a position in the second state where the second indicating area (7112) is exposed at the first opening (11).

6. The circuit breaker according to claim 5, characterized in that: The first limiting portion (12) is a first protrusion (121), and the first protrusion (121) is arranged on the inner wall of the housing (1) and is located on one side of the first opening (11); The second limiting portion (715) is a second protrusion (7151), the second protrusion (7151) is located on the surface of the indicating portion (711) facing the first opening (11), and the sum of the protruding height of the first protrusion (121) and the protruding height of the second protrusion (7151) is greater than the distance between the indicating portion (711) and the inner wall of the housing (1); Wherein in the first state and the second state, the second protrusion (7151) is respectively located on two opposite sides of the first protrusion (121).

7. The circuit breaker according to claim 5 or 6, characterized in that: The shell (1) is provided with a second opening (13), the second opening (13) is communicated with the inner cavity of the shell (1), and the second opening (13) is arranged at a distance from the first opening (11), and the first limiting portion (12) is located between the first opening (11) and the second opening (13); At least a part of the indicating portion (711) is an elastic structure (7113) having elasticity in the opening direction of the second opening (13); in the second state, the elastic structure (7113) corresponds to the position of the second opening (13); and the second limiting portion (715) is located on the elastic structure (7113); The circuit breaker comprises a reset assembly (8), which is installed in the second opening (13) and can be actuated to apply force to the elastic structure (7113).

8. The circuit breaker according to claim 5 or 6, characterized in that: The indicating assembly (7) further comprises an elastic member (72), one end of the elastic member (72) being connected to the housing (1), and the other end of the elastic member (72) being connected to the second arm (714) of the indicating member (71); The elastic member (72) is configured to apply elastic force to the second arm (714) of the indicator member (71) to drive the indicator member (71) to rotate along the closing direction of the handle (2).

9. The circuit breaker according to claim 8, characterized in that A first fixing portion (14) is provided on the inner wall of the housing (1), and the first fixing portion (14) is located on a side of the indicator (71) away from the tripping assembly (5); A second fixing portion (716) is provided on the second arm (714) of the indicator (71); The two ends of the elastic member (72) are elastically connected to the first fixing portion (14) and the second fixing portion (716) respectively, and the elastic member (72) is in an elastically stretched state.

10. The circuit breaker according to claim 1, characterized in that The indicator (71) has a first axial hole (7121), and the handle (2) has a second axial hole (22); A mounting shaft portion (15) is provided on the inner wall of the housing (1), and the mounting shaft portion (15) is inserted into the first shaft hole (7121) and the second shaft hole (22), and the mounting shaft portion (15) is clearance-matched with the first shaft hole (7121) and the second shaft hole (22), respectively.

Images