circuit breaker

Abstract

A kind of circuit breaker, electric drive mechanism drives slider linear movement, handle swing is driven to realize electric closing and opening, and electric drive mechanism drives indication structure rotation to corresponding closing indication position and opening indication position, still include locking structure, locking structure is located between contact rotating shaft and indication structure, can be driven for locking indication structure by rotating shaft, when contact rotating shaft rotation drives moving contact and static contact contact, contact rotating shaft drives locking structure to lock indication structure, so that indication structure can rotate, but cannot rotate from closing indication position to opening indication position;When contact rotating shaft rotation drives moving contact and static contact separate, contact rotating shaft drives locking structure to release the lock of indication structure, indication structure can rotate from closing indication position to opening indication position, avoid moving and static contact abnormal adhesion to cause the state indicated by electric mechanism driven indication structure, with the actual opening and closing state of moving contact and static contact in circuit breaker body does not match.

Description

Technical Field

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

[0002] A molded case circuit breaker equipped with an electric operating mechanism generally includes an electric operating mechanism and a circuit breaker body. The electric operating mechanism controls the reciprocating movement of the handle on the circuit breaker body to realize the opening and closing of the circuit breaker.

[0003] The existing electric operating mechanism's indication function consists of a turntable, indicator, light guide, and display module that move in tandem with the handle. It lacks an isolation indication function. When an abnormal situation occurs during circuit breaker operation, such as the abnormal sticking of the moving and stationary contacts, although the moving and stationary contacts cannot be separated normally and are in a fault state, the electric operating mechanism will still force the circuit breaker to be in the open state under the control of the motor, which poses a safety hazard. Utility Model Content

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide a circuit breaker with an isolation indication function.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This application provides a circuit breaker, including a circuit breaker body and an electrically operated mechanism stacked together. The circuit breaker body includes a circuit breaker housing and a handle, an operating mechanism, a rotatably mounted contact shaft, at least one moving contact mounted on the contact shaft, and a stationary contact corresponding to the moving contact. The operating mechanism is connected to the contact shaft, and the handle is connected to the operating mechanism and partially extends out of the circuit breaker housing. The electrically operated mechanism includes a mechanism housing and an electric drive mechanism and an indicating structure mounted within the mechanism housing. The electric drive mechanism drives the indicating structure to rotate to corresponding closing and opening indication positions.

[0007] It also includes a locking structure, which is located between the contact shaft and the indicator structure. It can be driven by the contact shaft to lock the indicator structure. When the contact shaft rotates and drives the moving contact to contact the stationary contact, the rotation of the contact shaft can lock the indicator structure, allowing the indicator structure to rotate, but not from the closing indicator position to the opening indicator position.

[0008] When the contact shaft rotates and causes the moving contact to separate from the stationary contact, the rotation of the contact shaft can release the locking structure from the locking of the indicator structure, and the indicator structure can rotate from the closing indicator position to the opening indicator position.

[0009] In one possible implementation, the locking structure includes a push rod, at least one elastic element, and a locking element. The indicating structure is rotatably disposed within the mechanism housing. The locking element is located within the mechanism housing. The push rod is connected between the locking element and the contact shaft. When the contact shaft rotates and drives the moving contact to contact the stationary contact, the contact shaft drives the push rod to move, thereby driving the locking element or the elastic element to drive the locking element, so that the locking element locks the indicating structure.

[0010] When the contact shaft rotates and causes the moving contact to separate from the stationary contact, the contact shaft drives the push rod to move, which in turn drives the locking member or the elastic member to release the locking member from the indicating structure, allowing the indicating structure to rotate from the closed indicating position to the open indicating position.

[0011] In one possible implementation, the push rod includes a first push rod and a second push rod located on the same straight line. The second push rod is disposed inside the circuit breaker body housing and drives the contact shaft. The first push rod is disposed inside the mechanism housing and drives the locking member. The first and second push rods are linearly movable and driven together. The first push rod extends into the circuit breaker body housing and connects with the second push rod, or the second push rod extends into the mechanism housing and connects with the first push rod. When the contact shaft rotates, causing the moving contact to contact or separate from the stationary contact, it can drive the second push rod to drive the first push rod, so that the second push rod and the first push rod move in a straight line and drive the locking member to act.

[0012] In one possible implementation, the indicating structure includes an outer indicating disk and an inner bushing, the outer indicating disk and the inner bushing being flexibly connected to drive each other to rotate and to rotate relative to each other, the electric drive mechanism being driven connected to one of the outer indicating disk or the inner bushing, and the locking mechanism being locked to the other of the outer indicating disk or the inner bushing.

[0013] In one possible implementation, the indicating structure is provided with a sliding limit hole, which engages with the locking structure, allowing the locking structure to slide within the sliding limit hole for a free stroke.

[0014] In one possible implementation, the outer indicator disc is provided with a sliding limit hole, which is locked in place with the locking structure, and the inner bushing is driven in place with the electric drive mechanism; or, the inner bushing is provided with a sliding limit hole, which is locked in place with the locking structure, and the outer indicator disc is driven in place with the electric drive mechanism.

[0015] In one possible implementation, the outer indicator disk includes an indicator layer with a gradually decreasing cross-section along the axial direction, a locking member limiting layer, and a first micro switch driving layer. The outer side of the indicator layer away from the first micro switch driving layer is provided with an arc-shaped groove, and the inner side is provided with a status indicator mark. A second driving slope is provided on one side of the indicator layer for driving the second micro switch to switch states. The first micro switch driving layer includes a first driving slope for driving the first micro switch to switch states.

[0016] In one possible implementation, the outer indicator disk includes a first through hole in the middle, the inner bushing is embedded in the first through hole, a third elastic element is connected between the outer indicator disk and the inner bushing, the inner bushing is driven by an electric drive mechanism, and the outer indicator disk is locked by a locking mechanism and is provided with a status indicator.

[0017] In one possible implementation, the electric operating element further includes a first micro switch, a second micro switch, a third micro switch, a fourth micro switch, and a circuit board disposed within the mechanism housing. The first micro switch, the second micro switch, the third micro switch, and the fourth micro switch are connected to the circuit board. The first micro switch is used to transmit the circuit breaker's closed state, the second micro switch is used to transmit the circuit breaker's open state, the third micro switch is used to transmit the electric operating mechanism's closed state, and the fourth micro switch is used to transmit the electric operating mechanism's open state.

[0018] In one possible implementation, the housing includes an internal mounting plate, a turntable and a slider on a first side of the mounting plate, and an electric drive mechanism that drives the slider to move linearly via the turntable, thereby causing the handle to swing to achieve electric closing and opening. An indicator structure is located on a second side of the mounting plate, and the indicator structure is driven and cooperates with the first micro switch and the second micro switch respectively. The slider is driven and cooperates with the third micro switch, and the turntable is driven and cooperates with the fourth micro switch.

[0019] In one possible implementation, the locking member is integrally formed with the top rod, the locking member including a first bent portion and a first hook structure, the top rod, the first bent portion and the first hook structure being bent and connected in sequence, and the first hook structure engaging with the indicator structure for limiting.

[0020] In one possible implementation, the housing of the mechanism includes opposing first and second retaining walls, with the first bent portion located between the first and second retaining walls to restrict the radial rotational degree of freedom of the push rod, and a third retaining wall disposed between the first and second retaining walls, the height of which is less than the height of the first and second retaining walls, to restrict the axial movement degree of freedom of the push rod.

[0021] In one possible implementation, the locking member includes a rotating shaft, a driving part, and a locking part. The locking member is rotatably disposed within the mechanism housing via the rotating shaft. The driving part and the locking part are located at both ends of the rotating shaft. The push rod is driven and engaged with the driving part, and the locking part is limited and engaged with the indicating structure.

[0022] In one possible implementation, an intermediate base is also provided between the electric operating mechanism and the circuit breaker body, the electric operating mechanism and the circuit breaker body being fixedly installed via the intermediate base.

[0023] In one possible implementation, the first push rod includes a first push rod body, a first push rod drive portion that drives with a locking member, and a first connecting portion that drives with a second push rod, wherein the first push rod drive portion and the first connecting portion are located at both ends of the first push rod body;

[0024] The second push rod includes a second push rod body, a second connecting part that drives and cooperates with the first push rod, and a second push rod driving part that drives and cooperates with the contact shaft. The second connecting part and the second push rod driving part are located at both ends of the second push rod body, and the second connecting part drives and cooperates with the first connecting part.

[0025] In one possible implementation, the first connecting portion includes an arcuate protrusion, and the second connecting portion includes an arcuate groove; or, the first connecting portion includes an arcuate groove, and the second connecting portion includes an arcuate protrusion, wherein the arcuate protrusion is at least partially located within the arcuate groove and abuts against the arcuate groove.

[0026] In one possible implementation, the circuit breaker body housing is provided with a second through hole, and the second through hole has a funnel-shaped recessed groove on the side facing the mechanism housing. The outer diameter of the funnel-shaped recessed groove is larger than the diameter of the second through hole, and the inner diameter of the funnel-shaped recessed groove is equal to the diameter of the second through hole. The first push rod passes through the second through hole and extends into the circuit breaker body housing to connect with the second push rod.

[0027] In one possible implementation, at least one elastic element includes a first elastic element located within the mechanism housing and connected to a locking element for driving the locking element to reset; and / or, at least one elastic element includes a second elastic element located within the mechanism housing or circuit breaker body housing and connected to a push rod for driving the push rod to reset.

[0028] In one possible implementation, at least one elastic element includes a second elastic element, and an auxiliary contact module is further provided inside the circuit breaker body housing. The auxiliary contact module includes an auxiliary contact module housing and a fifth micro switch disposed inside the auxiliary contact module housing. The second elastic element and the second push rod are located inside the auxiliary contact module housing. The second elastic element is connected to the second push rod to drive the second push rod to reset. The second push rod is connected to the fifth micro switch to drive the fifth micro switch to switch states. One end of the second push rod extends out of the auxiliary contact module housing and is connected to the first push rod. The other end of the second push rod extends out of the auxiliary contact module housing and cooperates with the contact shaft.

[0029] In one possible implementation, the mechanism housing includes a mechanism top cover and a mechanism base, the circuit breaker body housing includes a circuit breaker middle cover and a circuit breaker base, the mechanism base is connected to the middle base, the mechanism top cover is fitted onto the side of the mechanism base away from the middle base, the circuit breaker middle cover is fitted onto the circuit breaker base, and the middle base is fitted onto the side of the circuit breaker middle cover away from the circuit breaker base; the mechanism top cover is provided with an indicator window, and an indicator structure is opposite to the indicator window; the mechanism base is provided with a mounting plate, and a mounting base is provided on the mounting plate, with one end of the mounting base extending toward the mechanism top cover and an indicator structure base provided, the indicator structure being mounted on the indicator structure base, and the other end extending toward the circuit breaker body and a turntable base provided, the turntable being mounted on the turntable base.

[0030] Compared to existing technologies, the circuit breaker of this invention also features a locking structure located between the contact shaft and the indicating structure. This locking structure, driven by the contact shaft, locks the indicating structure. When the contact shaft rotates, causing the moving contact to contact the stationary contact, the rotation of the contact shaft locks the indicating structure, allowing it to rotate but not from the closed position to the open position. When the contact shaft rotates, causing the moving contact to separate from the stationary contact, the locking structure releases the lock, allowing the indicating structure to rotate from the closed position to the open position. This avoids mismatches between the state indicated by the electric mechanism-driven indicating structure and the actual open / closed state of the moving and stationary contacts within the circuit breaker body, leading to incorrect indications due to faults such as abnormal adhesion between the moving and stationary contacts.

[0031] Furthermore, the indicating structure includes a sliding limit hole, which engages with the locking structure. The locking structure can slide within the sliding limit hole for one free stroke, allowing the indicating structure to rotate within a certain range when locked. When the circuit breaker's moving and stationary contacts are stuck together, the contact shaft cannot rotate, and the indicating structure cannot be unlocked. It can only rotate the length of the sliding limit hole, always indicating the closing position, thus improving the circuit breaker's safety.

[0032] Furthermore, the indicating structure includes an outer indicating disc and an inner bushing, which are flexibly connected, enabling them to rotate relative to each other. The electric drive mechanism is driven by either the outer indicating disc or the inner bushing, and the locking mechanism is locked to the other. This allows the outer indicating disc or the inner bushing connected to the electric drive mechanism to rotate within a certain range when the locking mechanism locks the indicating structure, i.e., between the closing indication position and the intermediate locked position. When the circuit breaker's opening moving contact and stationary contact are stuck together, the contact shaft cannot rotate, and the indicating structure cannot be unlocked, always displaying the closing indication position, thus improving the circuit breaker's safety.

[0033] Furthermore, the circuit breaker also includes an intermediate base disposed between the electric operating mechanism and the circuit breaker body, through which the electric operating mechanism and the circuit breaker body are fixedly installed. Compared with the prior art, this design integrates the circuit breaker body cover and the electric operating mechanism base into one intermediate base, reducing assembly steps and required materials, lowering material and labor costs, reducing assembly errors and gaps, and increasing motion accuracy. At the same time, the integrated structure of the circuit breaker body cover and the electric operating mechanism base reduces the overall height of the circuit breaker, facilitating installation.

[0034] In addition, the electrically operated component also includes a first microswitch, a second microswitch, a third microswitch, a fourth microswitch, and a circuit board disposed within the mechanism housing. The first microswitch transmits the circuit breaker's closed state, the second microswitch transmits the circuit breaker's open state, the third microswitch transmits the electrically operated mechanism's closed state, and the fourth microswitch transmits the electrically operated mechanism's open state. Compared to the prior art, the addition of the third and fourth microswitches for indicating the electrically operated mechanism's state allows for comparison between the circuit breaker's state and the electrically operated mechanism's state to determine if the circuit breaker's state is abnormal. This prevents the first and second microswitches from failing to switch states due to abnormal contact adhesion, which could cause the motor to continuously rotate and become stuck, thus preventing motor burnout and spring failure.

[0035] Furthermore, the push rod includes a first push rod and a second push rod located on the same straight line. The second push rod is disposed within the circuit breaker body housing and drives the contact shaft. The first push rod is disposed within the mechanism housing and drives the locking element. The first and second push rods are linearly movable and driven together. The first push rod extends into the circuit breaker body housing and connects to the second push rod, or the second push rod extends into the mechanism housing and connects to the first push rod. When the contact shaft rotates, causing the moving contact to contact or separate from the stationary contact, it can drive the second push rod to drive the first push rod, so that the second and first push rods move in a straight line and drive the locking element to operate. Compared with the integrated structure of the first and second push rods in the prior art, by installing the first push rod and the locking element within the mechanism housing and the second push rod within the circuit breaker body housing, the locking structure is installed separately, which facilitates modular installation and replacement of the electric operating mechanism and the circuit breaker body. Attached Figure Description

[0036] Figure 1 This is an exploded view of the circuit breaker of this utility model;

[0037] Figure 2 and Figure 3 These are schematic diagrams of the front and back of the mechanism base of the circuit breaker of this utility model;

[0038] Figure 4 This is a schematic diagram of the structure of the intermediate base of the circuit breaker of this utility model;

[0039] Figure 5 This is a sectional view of the circuit breaker of this utility model;

[0040] Figure 6 This is a schematic diagram of the connection between the locking structure, the indicating structure and the auxiliary contact module of this utility model, and a schematic diagram of the internal structure of the auxiliary contact module 25;

[0041] Figure 7 This is a schematic diagram of the third embodiment of the present invention, showing the locking structure and the indicating structure working together for locking.

[0042] Figure 8 and Figure 9 This is a schematic diagram of the fourth embodiment of the locking structure and the indicating structure of this utility model.

[0043] Figure 10 This is an exploded view of the fourth embodiment of the circuit breaker indicator structure of this utility model;

[0044] Figure 11 This is a schematic diagram of the slider of this utility model;

[0045] Figure 12 This is a schematic diagram of the structure of the indicating structure and the locking element when the circuit breaker of this utility model is in the closed state;

[0046] Figure 13 yes Figure 12 A sectional view;

[0047] Figure 14 This is a schematic diagram of the structure of the indicating structure and the locking member cooperating when the circuit breaker of this utility model is in the tripped state;

[0048] Figure 15 yes Figure 14 A sectional view;

[0049] Figure 16 This is a schematic diagram of the structure of the indicating structure and the locking element when the circuit breaker of this utility model is in the open state;

[0050] Figure 17 yes Figure 16 A sectional view;

[0051] The reference numerals in the attached figures include:

[0052] Electric control mechanism 1;

[0053] Second via 11; First micro switch 121; Second micro switch 122; Third micro switch 123; Fourth micro switch 124; Fifth micro switch 125;

[0054] Mechanism top cover 13; indicator window 131; mechanism base 14;

[0055] Circuit breaker body 2;

[0056] Handle 21; Contact shaft 22; Turntable 23; Slider 24; Auxiliary contact module 25; Circuit breaker middle cover 26; Circuit breaker base 27; Toggle element 28;

[0057] Middle base 3;

[0058] 31; rectangular handle hole 32; rectangular clearance hole 33; mounting part 34; funnel-shaped recessed groove 35;

[0059] Indicator structure 4;

[0060] Sliding limiting hole 41; outer indicator disk 42; first through hole 421; third elastic element 422; indicator layer 423; locking element limiting layer 424; first micro switch driving layer 425; arc groove 426; status indicator mark 427;

[0061] Inner bushing 43;

[0062] First push rod 51;

[0063] First push rod drive part 512; First connecting part 513;

[0064] Second push rod 52;

[0065] Second connecting part 522; Second push rod driving part 523;

[0066] Arc-shaped protrusion 5231; arc-shaped groove 5232; push rod limiting part 5233; push rod mating surface 5234;

[0067] Locking element 53; First elastic element 54; Second elastic element 55;

[0068] First bending part 531; first hook structure 532; first retaining wall 533; second retaining wall 534; first notch 535; driving part 537; locking part 538; limiting protrusion 5381;

[0069] Mistake #56. Detailed Implementation

[0070] The specific embodiments of this utility model are further described below with reference to the accompanying drawings. The scope of protection of this utility model is not limited to the description of the following embodiments.

[0071] like Figure 1-11 As shown, the circuit breaker in this embodiment includes a stacked electrical operating mechanism 1 and a circuit breaker body 2. The electrical operating mechanism 1 is installed above the circuit breaker body 2. The electrical operating mechanism 1 includes a mechanism housing and an electrical operating element disposed within the mechanism housing. The circuit breaker body 2 includes a circuit breaker body housing and a circuit breaker body element disposed within the circuit breaker body housing.

[0072] It should be noted that the circuit breaker body 2 is existing technology, such as... Figure 1As shown, the circuit breaker body components typically include a handle 21, an operating mechanism, a tripping mechanism, a rotatable contact shaft 22, at least one moving contact mounted on the contact shaft 22, and a corresponding stationary contact. The operating mechanism is connected to the contact shaft 22, and the handle 21 is connected to the operating mechanism and extends at least partially outside the circuit breaker body housing. When the circuit breaker is closed or opened, the handle 21 drives the contact shaft 22 to rotate via the operating mechanism, causing the moving contact to rotate with the contact shaft 22 and contact or separate from the stationary contact, thereby connecting and disconnecting the main circuit, realizing the closing and opening of the main circuit. When the circuit breaker trips (due to faults such as short circuit, overload, and leakage current in the main circuit), the tripping mechanism drives the operating mechanism to trip, and the operating mechanism drives the contact shaft 22 to rotate, causing the moving contact to rotate with the contact shaft 22 and separate from the stationary contact, disconnecting the main circuit and realizing the protection function. The tripping mechanism includes at least one of an overload protection mechanism, a short circuit protection mechanism, a thermal-magnetic protection mechanism, and a leakage current protection mechanism. The electrically operated element typically includes an electric drive mechanism and a slider 24. The slider 24 has a drive groove that fits onto the part of the handle 21 that extends out of the circuit breaker housing. The electric drive mechanism drives the slider 24 to move linearly, causing the handle 21 to swing and achieve electric closing and opening. The electric drive mechanism is a motor or electromagnetic mechanism, etc. The electric drive mechanism drives the slider 24 to move linearly through a turntable 23. The turntable 23 is rotatably set and has an eccentrically set drive shaft for driving the slider 24. The electrically operated element also includes an indicator structure 4, which is driven by the electric drive mechanism and is used to indicate the status of the circuit breaker. While the electric drive mechanism drives the circuit breaker to close and open through the slider 24, it also drives the indicator structure 4 to rotate to the corresponding closing and opening indicator positions to indicate the closed or open status of the circuit breaker. The electrically operated element also includes a manual operating component, which is typically a drive shaft fixedly connected to the turntable 23. By rotating the manual operating component, the turntable 23 is rotated, driving the slider 24 to move linearly and achieving manual closing and opening. This is prior art in the field and will not be described in detail here.

[0073] Preferred, such as Figure 1 As shown, the circuit breaker also includes an intermediate base 3 disposed between the electric operating mechanism 1 and the circuit breaker body 2, with the electric operating mechanism 1 and the circuit breaker body 2 fixedly installed via the intermediate base 3. Compared to the prior art, this design integrates the cover of the circuit breaker body 2 with the electric operating mechanism base to form the intermediate base 3, reducing assembly steps and required materials, lowering material and labor costs, reducing assembly errors and gaps, and increasing motion accuracy. Simultaneously, the integrated structure of the cover of the circuit breaker body 2 and the electric operating mechanism base reduces the overall height of the circuit breaker, facilitating installation.

[0074] Furthermore, such as Figure 4As shown, the intermediate base 3 includes a shielding part 31 for shielding the circuit breaker operating surface. The shielding part 31 includes a rectangular handle hole 32 located in the middle of the shielding part 31 for the handle 21 to pass through, and a rectangular clearance hole 33 located at one end of the shielding part 31. The rectangular clearance hole 33 is located below the rectangular handle hole 32.

[0075] Furthermore, such as Figure 1 and Figure 4 As shown, the intermediate base 3 is fixed to the circuit breaker body 2 with screws. The shielding part 31 has a rectangular structure, and the intermediate base 3 also includes mounting parts 34 protruding at the four corners of the shielding part 31. The mounting parts 34 include screw through holes for screws to pass through, so that the intermediate base 3 can be installed to the circuit breaker body 2 with screws. Of course, in other embodiments, the intermediate base 3 can also be installed and fixed to the circuit breaker body 2 by means of snap-fit.

[0076] Preferred, such as Figure 1 and Figure 2 As shown, a key improvement of this application is that the circuit breaker further includes a locking structure that cooperates with the indicating structure 4. The indicating structure 4 is rotatably disposed within the mechanism housing, and the locking structure is disposed within both the circuit breaker body housing and the mechanism housing. The locking structure is located between the contact shaft 22 and the indicating structure 4, and can be driven by the contact shaft 22 to lock the indicating structure 4. When the contact shaft 22 rotates and causes the moving contact to contact the stationary contact, the contact shaft 22 rotates so that the locking structure can lock the indicating structure 4. The indicating structure 4 can rotate a certain distance, but cannot rotate from the closing indication position to the opening indication position. When the contact shaft 22 rotates and causes the moving contact to separate from the stationary contact, the locking structure releases the lock on the indicating structure 4, allowing the indicating structure 4 to rotate from the closing indication position to the opening indication position. This avoids the problem of mismatch between the state indicated by the indicating structure 4 driven by the electric mechanism and the actual opening and closing state of the moving and stationary contacts within the circuit breaker body 2 due to faults such as abnormal adhesion between the moving and stationary contacts, resulting in an indication error.

[0077] Preferred, such as Figures 5-9As shown, the locking structure in this embodiment includes a push rod, at least one elastic element, and a locking element 53. The indicating structure 4 is rotatably disposed within the mechanism housing, and the locking element 53 is located within the mechanism housing. The push rod is connected between the locking element 53 and the contact shaft 22. When the circuit breaker is closed, the contact shaft 22 rotates, causing the moving contact to contact the stationary contact. The contact shaft 22 drives the push rod to move, causing the locking element 53 or the elastic element to drive the locking element 53, so that the locking element 53 locks the indicating structure 4. The indicating structure 4 can rotate relative to the locking element 53 within a certain range, but the indicating structure 4 cannot rotate from the closed indicating position to the open indicating position. When the circuit breaker is opened or tripped, the contact shaft 22 rotates, causing the moving contact to separate from the stationary contact. The contact shaft 22 drives the push rod to move, causing the locking element 53 or the elastic element to drive the locking element 53, so that the locking element 53 releases the locking of the indicating structure 4, and the indicating structure 4 can rotate from the closed indicating position to the open indicating position. The tripping indicator position indicates the tripping status of the circuit breaker, which can be normal tripping and / or free tripping. The elastic element can be, but is not limited to, a torsion spring, tension spring, spring, or compression spring. The push rod and locking element 53 can be integrally formed or separately set. The push rod can directly or indirectly drive the locking element 53.

[0078] like Figure 5 As shown, in the first embodiment of the locking structure, when the circuit breaker is closed, the contact shaft 22 rotates to the closed position, driving the push rod to move upward in a straight line. The push rod drives the locking member 53 to lock with the indicating structure 4, allowing the elastic element to store energy, and the indicating structure 4 to be locked in the closed indicating position. When the circuit breaker is opened or tripped, the contact shaft 22 rotates to the open or tripped position, causing the contact shaft 22 to release the push rod. The elastic element releases energy, driving the push rod to move downward in a straight line, causing the locking member 53 to unlock the indicating structure 4, and the indicating structure 4 can rotate to the open indicating position.

[0079] In the second motion embodiment of the locking structure, when the circuit breaker is closed, the contact shaft 22 rotates to the closed position to release the push rod, and the elastic element releases energy to drive the push rod to move downward in a straight line, so that the locking element 53 locks the indicator structure 4 in the closed indication position; when the circuit breaker is opened or tripped, the contact shaft 22 rotates to the open or tripped position to drive the push rod to move upward in a straight line to release the locking element 53 from locking the indicator structure 4, and the indicator structure 4 can rotate to the open indication position, and the elastic element stores energy.

[0080] In a preferred embodiment of this application, a second motion embodiment of the locking structure is adopted, namely, when the circuit breaker is closed, the push rod moves downward in a straight line to drive the locking member 53 to lock the indicator structure 4; when the circuit breaker is opened or tripped, the push rod moves upward in a straight line to drive the locking member 53 to release the lock on the indicator structure 4.

[0081] When the locking structure locks the indicator structure 4, the indicator structure 4 can rotate within a certain range and has a certain degree of freedom, but it cannot rotate to the open indication position. It can also be understood that there is an intermediate locking position between the closing indication position and the open indication position. When the locking structure locks the indicator structure 4, the indicator structure 4 can rotate between the closing indication position and the intermediate locking position. When the locking structure releases the lock on the indicator structure 4, the indicator structure 4 can rotate freely, from the closing indication position to the open indication position.

[0082] The specific process of the locking structure and the unlocking indicator structure 4 cooperating is as follows:

[0083] When the circuit breaker is closed, the electric drive mechanism drives the slider 24 to move linearly, causing the handle 21 to swing. The electric drive mechanism also drives the indicator structure 4 to rotate from the open indicator position to the close indicator position. The handle 21 drives the contact shaft 22 to rotate through the operating mechanism, causing the moving contact to rotate with the contact shaft 22 towards the stationary contact. The rotation between the indicator structure 4 and the contact shaft 22 has a certain lag. As the contact shaft 22 rotates towards the close position, the push rod is released. The elastic element releases energy and drives the push rod to move downward in a straight line, causing the locking element 53 to lock the indicator structure 4. The indicator structure 4 still has a certain degree of freedom and can rotate between the intermediate locked position and the close indicator position. The electric drive mechanism continues to drive the indicator structure 4 to rotate to the close indicator position and continues to drive the handle 21 to drive the contact shaft 22. The moving contact rotates with the contact shaft 22 and contacts the stationary contact.

[0084] When the circuit breaker is tripped, the electric drive mechanism drives the slider 24 to move linearly, causing the handle 21 to swing. The electric drive mechanism also drives the indicator structure 4 to rotate from the closing indicator position to the intermediate locking position. The handle 21 drives the contact shaft 22 to rotate through the operating mechanism, causing the moving contact to rotate away from the stationary contact along with the contact shaft 22. The rotation between the indicator structure 4 and the contact shaft 22 has a certain lag. In the initial stage of the movement of the indicator structure 4, the push rod will not rise. As the contact shaft 22 rotates towards the tripping position, it drives the push rod to move upward in a straight line, causing the locking member 53 to release the lock on the indicator structure 4. At this time, the indicator structure 4 has not yet rotated to the intermediate locking position, or has just rotated to the intermediate locking position. The electric drive mechanism continues to drive the indicator structure 4 to rotate to the tripping indicator position, and continues to drive the handle 21 to drive the contact shaft 22 to rotate to the tripping position. The moving contact separates from the stationary contact as the contact shaft 22 rotates.

[0085] When the circuit breaker is tripped, if the moving and stationary contacts stick together due to an abnormal situation, the contact shaft 22 cannot rotate to the tripped position, the push rod will not rise, the locking member 53 cannot release the lock on the indicating structure 4, the indicating structure 4 is locked and cannot rotate to the tripped position, and always indicates the closing position, so that the indicating state of the indicating structure 4 is consistent with the actual state of the circuit breaker, thereby improving the safety of the circuit breaker.

[0086] Specifically, the first embodiment of this application (not shown in the figure, but can be referred to) Figure 9 The indicating structure 4 includes a sliding limiting hole 41, which engages with the locking structure. The locking structure can slide within the sliding limiting hole 41 for a free stroke, allowing the indicating structure 4 to rotate within a certain range when locked. In this embodiment, the sliding limiting hole 41 engages with a locking member 53, which can slide a certain distance within the sliding limiting hole 41. This allows the indicating structure 4 to rotate within a certain range when locked, i.e., between the closed indication position and the intermediate locked position. When the circuit breaker trips, the sliding limit hole 41 allows the locking structure to lock the indicating structure 4, while the electric drive mechanism can still drive the indicating structure 4 to rotate partially. This causes the electric drive mechanism to drive the contact shaft 22 to rotate, which in turn activates the locking structure, releasing the lock on the indicating structure 4. The electric drive mechanism then drives the contact shaft 22 and the indicating structure 4 to rotate together. When the moving and stationary contacts of the circuit breaker trip, the contact shaft 22 cannot rotate, and the indicating structure 4 cannot be unlocked. It can only rotate the length of the sliding limit hole 41, always indicating the closing position, thus improving the safety of the circuit breaker. The sliding limit hole 41 can be an oblong or arc-shaped hole, etc.

[0087] The second embodiment of this application (not shown in the figure, but can be referred to) Figure 10 The indicating structure 4 includes an outer indicating disk 42 and an inner bushing 43 disposed inside the outer indicating disk 42. The outer indicating disk 42 and the inner bushing 43 are flexibly connected, capable of rotating each other and rotating relative to each other. The electric drive mechanism is driven by one of the outer indicating disk 42 or the inner bushing 43, and the locking mechanism is locked to the other of the outer indicating disk 42 or the inner bushing 43. When the locking member 53 locks the indicating structure 4, the outer indicating disk 42 or the inner bushing 43 connected to the electric drive mechanism can rotate within a certain range, that is, between the closing indication position and the intermediate locking position. When the circuit breaker's opening moving contact and stationary contact are stuck together, the contact shaft 22 cannot rotate, and the indicating structure 4 cannot be unlocked, always indicating the closing indication position, which can improve the safety of the circuit breaker.

[0088] In this second embodiment, taking the electric drive mechanism and the inner bushing 43 as an example, the outer indicator disk 42 is locked with the locking mechanism and is provided with a status indicator mark 427. The outer indicator disk 42 and the inner bushing 43 are flexibly connected through a third elastic member 422. The electric drive mechanism can drive the inner bushing 43 to rotate, and the inner bushing 43 can drive the outer indicator disk 42 to rotate. Due to the setting of the third elastic member 422, when the outer indicator disk 42 is locked, the inner bushing 43 can rotate relative to the outer indicator disk 42 within a certain range.

[0089] After the circuit breaker is closed, the outer indicator panel 42 is locked to the locking structure. When the circuit breaker is opened, the electric drive mechanism rotates the inner bushing 43, which in turn indirectly rotates the contact shaft 22, thereby unlocking the locking structure from the outer indicator panel 42. After unlocking, the outer indicator panel 42 rotates together with the inner bushing 43 to the open indication position to indicate the open state. When the circuit breaker is opened and a fault occurs where the moving contact and stationary contact are stuck together, the electric drive mechanism can rotate the inner bushing 43 to the intermediate locking position. The contact shaft 22 cannot rotate, and the locking structure always locks the outer indicator panel 42 of the indicator structure 4. The outer indicator panel 42 cannot rotate to the open indication position to indicate the open state, ensuring that the indication state of the indicator structure 4 is consistent with the actual state of the circuit breaker, thus improving the safety of the circuit breaker operation.

[0090] like Figure 8-10 As shown in the fourth embodiment of this application, the indicating structure 4 may simultaneously have the sliding limiting hole 41 of the first embodiment and the flexible connection of the outer indicating disk 42 and inner bushing 43 of the second embodiment. That is, the indicating structure 4 includes the outer indicating disk 42, the inner bushing 43, and the sliding limiting hole 41. The outer indicating disk 42 is provided with the sliding limiting hole 41, which is locked in place with the locking structure, and the inner bushing 43 is driven in place with the electric drive mechanism; or, the inner bushing 43 is provided with the sliding limiting hole 41, which is locked in place with the locking structure, and the outer indicating disk 42 is driven in place with the electric drive mechanism, which will not be described in detail here.

[0091] like Figure 6-7As shown in the third embodiment of this application, the indicating structure 4 adopts the flexible connection of the outer indicating disk 42 and the inner bushing 43 of the second embodiment. The indicating structure 4 includes the inner bushing 43, the outer indicating disk 42, and a third elastic member 422 connecting the inner bushing 43 and the outer indicating disk 42. The locking member 53 includes a first hook structure 532, and the outer indicating disk 42 includes a misalignment 56. When the circuit breaker is in the closed state, the first push rod 51 moves downward, driving the first hook structure 532 to descend to the plane of the misalignment 56. The outer indicating disk 42 rotates, causing the first hook structure 532 to abut against the misalignment 56, limiting the rotation angle of the outer indicating disk 42 and locking the indicating structure 4.

[0092] like Figure 8-10 As shown in the fourth embodiment of this application, the indicating structure 4 adopts the flexible connection of the outer indicating disk 42 and the inner bushing 43 of the second embodiment. The indicating structure 4 includes the inner bushing 43, the outer indicating disk 42, and a third elastic member 422 connecting the inner bushing 43 and the outer indicating disk 42. The locking member 53 is generally in the form of a lever structure. The locking member 53 includes an integrally formed rotating shaft, a driving part 537, and a locking part 538. The outer indicating disk 42 includes a sliding limit hole 41. When the circuit breaker is in the closed state, the first push rod 51 moves downward, and the first elastic member 54 drives the locking member 53 to swing, so that the limiting protrusion 5381 on the locking part 538 extends into the sliding limit hole 41. The sliding distance of the sliding limit hole 41 limits the rotation angle of the outer indicating disk 42, thereby locking the indicating structure 4.

[0093] Furthermore, such as Figures 6-10 As shown in the first, second, third, and fourth embodiments above, the indicating structure 4 is the same as the driving and cooperating structure of the micro switch. That is, the outer indicating disk 42 includes an indicating layer 423 with a gradually decreasing cross-section along the axial direction, a locking member limiting layer 424, and a first micro switch driving layer 425. The outer side of the indicating layer 423 away from the first micro switch driving layer 425 is provided with an arc-shaped groove 426, and the inner side is provided with a status indicator 427. A second driving slope is provided on one side of the indicating layer 423 for driving the second micro switch 122 to switch states. The first micro switch driving layer 425 includes a first driving slope for driving the first micro switch 121 to switch states.

[0094] The third elastic element 422 may be, but is not limited to, a coil spring, a compression spring, a torsion spring, a spring, or a tension spring. In a preferred embodiment of this application, the third elastic element 422 is a coil spring.

[0095] Furthermore, such as Figure 10As shown, the outer indicator disk 42 includes a first through hole 421 in the middle, the inner bushing 43 is embedded in the first through hole 421, a third elastic element 422 is connected between the outer indicator disk 42 and the inner bushing 43, the third elastic element 422 flexibly connects the outer indicator disk 42 and the inner bushing 43, the inner bushing 43 is driven by an electric drive mechanism, and the outer indicator disk 42 is provided with the sliding limiting hole 41.

[0096] Specifically, such as Figure 10 As shown, the inner bushing 43 has a first driving protrusion on the side facing the contact shaft 22, the inner wall of the first through hole 421 of the outer indicator disk 42 has a second driving protrusion, the third elastic member 422 has a third through hole, a first driving part is provided on one side inside the third through hole, and a second driving part is provided on one side outside the third elastic member.

[0097] During installation, the third elastic element is installed in the first through hole 421 of the outer indicator disk 42, and the inner bushing 43 is installed in the third through hole of the third elastic element. The first driving part is driven to cooperate with the first driving protrusion, and the second driving part is driven to cooperate with the second driving protrusion. When the inner bushing 43 and the outer indicator disk 42 rotate relative to each other, the third elastic element 422 stores or releases energy.

[0098] In another embodiment, the third elastic element 422 is a torsion spring (not shown in the figure), the third elastic element 422 is provided with a fourth through hole, the outer wall of the fourth through hole is provided with a third driving part and a fourth driving part, the outer wall of the inner bushing 43 is provided with a third driving protrusion, and the inner wall of the first through hole 421 of the outer indicator disk 42 is provided with a fourth driving protrusion.

[0099] During installation, the third elastic element 422 is installed in the first through hole 421 of the outer indicator disk 42. The third driving part and the third driving protrusion drive each other, and the fourth driving part and the fourth driving protrusion drive each other. When the inner bushing 43 and the outer indicator disk 42 rotate relative to each other, the third elastic element 422 stores or releases energy.

[0100] like Figures 5-9 As shown, at least one elastic element of the locking structure includes a first elastic element 54, which is located inside the mechanism housing and connected to the locking element 53, for driving the locking element 53 to reset; and / or, at least one elastic element includes a second elastic element 55, which is located inside the mechanism housing or the circuit breaker body housing and connected to the top rod, for driving the top rod to reset.

[0101] like Figures 6-7As shown, in the third embodiment of this application, the locking member 53 is integrally formed with the top rod. The locking member 53 in this embodiment includes a first bent portion 531 and a first hook structure 532. The top rod, the first bent portion 531, and the first hook structure 532 are sequentially bent and connected. The end of the first hook structure 532 away from the top rod is located above the indicating structure 4 and engages with the indicating structure 4 for limiting. When the circuit breaker is closed, the first elastic member 54 and / or the second elastic member 55 release energy, driving the top rod and the locking member 53 to move downwards in a straight line, causing the first hook structure 532 of the locking member 53 to engage and lock with the indicating structure 4, locking the indicating structure 4 in the closed indication position. When the circuit breaker is opened or tripped, the contact shaft 22 drives the top rod to move upwards in a straight line, driving the first elastic member 54 and / or the second elastic member 55 to store energy, causing the first hook structure 532 of the locking member 53 to unlock with the indicating structure 4, allowing the indicating structure 4 to rotate to the open indication state. Preferably, the first hook structure 532 includes a second bent portion, a third bent portion, and a fourth bent portion that are bent and connected. The top rod, the first bent portion 531, the second bent portion, the third bent portion, and the fourth bent portion are connected at right angles in sequence. Of course, they may not be absolute right angles.

[0102] Furthermore, such as Figure 2 As shown, the housing of the mechanism includes a first retaining wall 533 and a second retaining wall 534 facing each other. The first bending portion 531 is located between the first retaining wall 533 and the second retaining wall 534 to restrict the radial rotational freedom of the push rod. And / or, a third retaining wall is provided between the first retaining wall 533 and the second retaining wall 534. The height of the third retaining wall is less than the height of the first retaining wall 533 and the second retaining wall 534. A first notch 535 is formed above the third retaining wall and between the first retaining wall 533 and the second retaining wall 534. The first bending portion 531 is confined within the first notch 535 to restrict the axial movement freedom of the push rod.

[0103] like Figures 8-9As shown, in the fourth embodiment of this application, the locking member 53 and the push rod are not integrally formed. The locking member 53 is rotatably or slidably disposed within the mechanism housing. In this embodiment, the locking member 53 is rotatably disposed within the mechanism housing. The push rod and the first elastic member 54 drive the locking member 53 to rotate, thereby locking or unlocking the indicating structure 4. The locking member 53 is generally a lever structure. The locking member 53 includes an integrally formed rotating shaft, a driving part 537, and a locking part 538. The locking member 53 is rotatably disposed within the mechanism housing via the rotating shaft. The driving part 537 and the locking part 538 are located at opposite ends of the rotating shaft. The push rod drives the driving part 537 in a driving engagement, and the locking part 538 engages with the indicating structure 4 in a limiting engagement. The push rod drives the driving part 537 to rotate the locking member 53, thereby engaging the locking part 538 with the indicating structure 4 to lock or unlock.

[0104] Specifically, such as Figures 8-9 As shown, the first elastic element 54 is connected to the driving part 537 of the locking element 53. The locking part 538 is located below the indicating structure 4. When the circuit breaker is closed, the contact shaft 22 rotates to release the push rod. The second elastic element 55 releases energy to drive the push rod to move downward in a straight line, and / or the first elastic element 54 releases energy to drive the driving part 537 to rotate downward, so that the locking part 538 rotates upward and locks with the indicating structure 4, locking the indicating structure 4 in the closed indicating position. When the circuit breaker is opened or tripped, the contact shaft 22 rotates to drive the push rod to move upward in a straight line, driving the driving part 537 to rotate upward, so that the locking part 538 rotates downward, releasing the locking part 538 from the indicating structure 4, and the indicating structure 4 can rotate to the open indicating position.

[0105] Preferred, such as Figures 5-6 As shown, the push rods in this embodiment include a first push rod 51 and a second push rod 52 located on the same straight line. The second push rod 52 is disposed inside the circuit breaker body housing and drives the contact shaft 22. The first push rod 51 is disposed inside the mechanism housing and drives the locking member 53. The first push rod 51 and the second push rod 52 are linearly movable and driven together. The first push rod 51 extends into the circuit breaker body housing and connects with the second push rod 52, or the second push rod 52 extends into the mechanism housing and connects with the first push rod 51. When the contact shaft 22 rotates, causing the moving contact to contact or separate from the stationary contact, it can drive the second push rod 52 to drive the first push rod 51, so that the second push rod 52 and the first push rod 51 move in a straight line, driving the locking member 53 to operate.

[0106] Of course, as another embodiment, the first push rod 51 and the second push rod 52 can also be integrally formed. Compared with the embodiment where the first push rod 51 and the second push rod 52 are integrally formed, by setting the first push rod 51 and the second push rod 52 separately, the first push rod 51 and the locking member 53 are installed in the mechanism housing, and the second push rod 52 is installed in the circuit breaker body housing, so that the locking structure is installed separately, which facilitates the modular installation and replacement of the electric operating mechanism 1 and the circuit breaker body 2; moreover, the circuit breaker has an isolation indication function. When the moving and stationary contacts are stuck together, the locking structure locks the indication structure 4 in the closing indication position, thereby improving the safety of the circuit breaker.

[0107] Furthermore, such as Figures 5-6 As shown, in this embodiment, the first push rod 51 is a strip rod with a cylindrical cross-section, and the second push rod 52 is an irregularly shaped structure.

[0108] Preferred, such as Figure 5 As shown, the first push rod 51 includes a first push rod body slidably disposed on the mechanism housing and the intermediate base 3, a first push rod driving part 512 that drives and cooperates with the locking member 53, and a first connecting part 513 that drives and cooperates with the second push rod 52. The first push rod driving part 512 and the first connecting part 513 are located at both ends of the first push rod body.

[0109] The second push rod 52 includes a second push rod body slidably disposed within the circuit breaker body 2, a second connecting part 522 drivingly cooperating with the first push rod 51, and a second push rod driving part 523 drivingly cooperating with the contact shaft 22. The second connecting part 522 and the second push rod driving part 523 are located at both ends of the second push rod body.

[0110] Furthermore, such as Figure 5 As shown, the first connecting part 513 of the first push rod 51 passes through the circuit breaker body housing and / or mechanism housing and intermediate base 3 in sequence and drives and cooperates with the second connecting part 522 of the second push rod 52.

[0111] Furthermore, such as Figure 4 As shown, the circuit breaker body housing and / or intermediate base 3 are provided with a second through hole 11. A funnel-shaped recessed groove 35 is provided on one side of the second through hole 11. The outer diameter of the funnel-shaped recessed groove 35 is larger than the diameter of the second through hole 11, and the inner diameter of the funnel-shaped recessed groove 35 is equal to the diameter of the second through hole 11. The first push rod 51 passes through the funnel-shaped recessed groove 35, passes through the second through hole 11, and is connected to the second push rod 52.

[0112] Specifically, in this embodiment, as follows: Figure 4As shown, the intermediate base 3 is provided with a second through hole 11. The side of the second through hole 11 facing the mechanism housing has a funnel-shaped recessed groove 35. The bottom of the mechanism housing includes a positioning groove, and the bottom of the positioning groove includes a third through hole. The first connecting part 513 of the first push rod 51 passes through the third through hole and the second through hole 11 in sequence and connects with the second connecting part 522 of the second push rod 52. Since the first push rod 51 passes through multiple parts in sequence and has a small diameter, the fitting accuracy requirement in the insertion direction of the first push rod 51 is high. Due to the limited field of vision of the installer during the installation of the push rod, the positioning groove and the funnel-shaped recessed groove 35 of the intermediate base 3 facilitate the installation of the first push rod 51.

[0113] Furthermore, such as Figure 8 As shown, the first push rod 51 abuts against the second push rod 52. The first connecting portion 513 includes an arc-shaped protrusion 5231, and the second connecting portion 522 includes an arc-shaped groove 5232. Alternatively, the first connecting portion 513 includes an arc-shaped groove 5232, and the second connecting portion 522 includes an arc-shaped protrusion 5231. The arc-shaped protrusion 5231 is at least partially located within the arc-shaped groove 5232 and abuts against it. This facilitates positioning and matching during the installation of the first push rod 51 and the second push rod 52, preventing slippage due to incomplete contact. Of course, the first connecting portion 513 and the second connecting portion 522 can also be other structures that cooperate for installation, and the protrusion and groove of the first connecting portion 513 and the second connecting portion 522 do not have to be arc-shaped. For example, the first push rod 51 and the second push rod 52 can be plugged into each other, with one end of the first push rod 51 extending into the circuit breaker body housing and then inserted into the connecting groove at one end of the second push rod 52 for fixed connection.

[0114] Preferred, such as Figure 5 and Figure 6 As shown, the second elastic element 55 is located inside the circuit breaker body housing and connected to the second push rod 52, driving the second push rod 52 to move linearly. In this embodiment, the first elastic element 54 is a tension spring, and the second elastic element 55 is a compression spring, sleeved on the second push rod body. Of course, in other embodiments, the second elastic element 55 may not be provided, or the second elastic element 55 may be provided on the first push rod 51. In this embodiment, the force of the first elastic element 54 is greater than the force of the second elastic element 55, so that the first push rod 51 and the second push rod 52 are always in contact.

[0115] Preferred, such as Figures 5-8 As shown, the circuit breaker body component also includes an auxiliary contact module 25 for transmitting electrical signals. The auxiliary contact module 25 is disposed within the circuit breaker body housing and can transmit electrical signals indicating the circuit breaker's open and closed states. Figure 6As shown, the auxiliary contact module 25 includes an auxiliary contact module 25 housing and a fifth micro switch 125 disposed within the auxiliary contact module 25 housing. The second push rod 52 is located inside the auxiliary contact module 25. The linear movement of the second push rod 52 can drive the fifth micro switch 125 to switch states to output an electrical signal indicating the circuit breaker status. That is, the second push rod 52 is actually part of the auxiliary contact module 25. By cooperating with the fifth micro switch 125 and the second push rod 52, the circuit breaker status indication after the installation of the electric operating mechanism 1 is realized. The second push rod 52's second push rod drive part 523 extends out of the auxiliary contact module 25 housing and cooperates with the contact shaft 22. The second push rod 52's second connecting part 522 extends out of the auxiliary contact module 25 housing and connects with the first push rod 51. Alternatively, the first push rod 51 can partially extend into the auxiliary contact module 25 housing and connect with the second push rod 52. The second elastic element 55 is located inside the auxiliary contact module 25 housing. The second elastic element 55 connects with the second push rod 52 to drive the second push rod 52 to reset. By setting the second elastic element 55 to act on the second push rod 52, the sensitivity of the indicator structure 4's reset can be enhanced. The auxiliary contact module 25 is modularly installed inside the circuit breaker body housing for easy installation and replacement.

[0116] Furthermore, such as Figure 6 As shown, the fifth micro switch 125 is located on one side of the second push rod 52. A fifth micro switch driving part is provided on one side wall of the second push rod 52. The second push rod 52 moves linearly and drives the fifth micro switch 125 to switch states through the fifth micro switch driving part. Specifically, in this embodiment, the fifth micro switch driving part is a fifth driving inclined surface that protrudes in the direction of the fifth micro switch 125.

[0117] In other possible implementations, the auxiliary contact module 25 may also be equipped with two microswitches to transmit electrical signals indicating the tripping status of the circuit breaker.

[0118] Furthermore, such as Figure 6 As shown, the second push rod driving part 523 also includes a push rod limiting part 5233, which is located outside the housing of the auxiliary contact module 25. Specifically, the push rod limiting part 5233 bends and protrudes axially from the second push rod 52 and abuts against the housing of the auxiliary contact module 25, restricting the second push rod driving part 523 from entering the housing of the auxiliary contact module 25.

[0119] Preferably, when the circuit breaker closes, opens, or trips, the contact shaft 22 drives the moving contact to rotate while simultaneously driving the second push rod 52 to drive the first push rod 51 to move linearly, causing the first push rod 51 to drive the locking member 53 to lock or unlock the state of the indicator structure 4. Specifically, as shown... Figure 5As shown, the contact shaft 22 has a radially protruding shaft driving part, and the second push rod driving part 523 includes a push rod mating surface 5234. The shaft driving part and the push rod mating surface 5234 drive each other, and the contact shaft 22 drives the second push rod 52 to move linearly through the shaft driving part. When the circuit breaker trips or opens, the contact shaft 22, through the shaft drive, acts on the push rod mating surface 5234 of the second push rod 52, driving the second push rod 52 to move upward (the second push rod 52 and the housing of the auxiliary contact module 25 compress the second elastic element 55, causing the second elastic element 55 to store energy). This causes the second push rod 52 to push the first push rod 51 to move upward. The first push rod 51 drives the locking element 53 to act, unlocking the locking element 53 from the indicating structure 4. The locking element 53 then drives the first elastic element 54 to store energy. When the circuit breaker closes, the contact shaft 22 drives the shaft drive to release the force on the push rod mating surface 5234, causing the first elastic element 54 and the second elastic element 55 to release energy. The first elastic element 54 drives the locking element 53 to act and engage with the indicating structure 4 to limit the movement. This drives the first push rod 51 to move downward in a straight line, and the second elastic element 55 drives the second push rod 52 to move downward in a straight line, thereby locking the indicating structure 4 in the closed indication position with the locking element 53.

[0120] By connecting the locking structure to the contact shaft 22 on which the moving contact is installed, the indicator structure 4 can be locked in the closing indication position more accurately, avoiding the problem that the state indicated by the indicator structure 4 does not match the actual position of the moving contact due to the adhesion between the moving and stationary contacts.

[0121] Preferred, such as Figure 2 and Figure 3 As shown, the electric operating element also includes a micro switch assembly, which includes a first micro switch 121 for transmitting the circuit breaker's closed state, a second micro switch 122 for transmitting the circuit breaker's open state, a third micro switch 123 for transmitting the electric operating mechanism 1's closed state, a fourth micro switch 124 for transmitting the electric operating mechanism 1's open state, and a circuit board for receiving and transmitting signals. When the electric operating mechanism 1 drives the handle 21 of the circuit breaker body 2 to perform an open or close operation, it simultaneously drives the first micro switch 121, the second micro switch 122, the third micro switch 123, and the fourth micro switch 124 to switch states.

[0122] The third embodiment will be used as an example for explanation, such as Figure 7 , Figure 12 and Figure 13 As shown, in the closed state of the circuit breaker, the first hook structure 532 is located on one side of the indicating structure 4 and limits the rotation of the indicating structure 4, as shown. Figure 14 and Figure 15As shown, in the tripped state of the circuit breaker, the first hook structure 532 is located above and spaced apart from the indicator structure 4, and the indicator structure 4 can rotate freely. Figure 16 and Figure 17 As shown, in the circuit breaker open state, the first hook structure 532 is located above the indicator structure 4, but inside the arc-shaped groove. Specifically, when the circuit breaker is closed, the first push rod 51 moves downward, causing the first hook structure 532 to limit the rotation angle of the indicator structure 4 and lock the indicator structure 4; when the circuit breaker is open, the first push rod 51 moves upward, causing the first hook structure 532 to be located inside the arc-shaped groove of the indicator structure 4, and the first hook structure 532 can rotate inside the arc-shaped groove, releasing the lock on the indicator structure 4; when the circuit breaker trips, the first push rod 51 continues to move upward, and the indicator structure 4 disengages from the arc-shaped groove and is spaced apart from the indicator structure 4.

[0123] Specifically, such as Figure 2 and Figure 3 As shown, the housing of the mechanism includes an internal mounting plate. The turntable 23 and slider 24 are located on the first side of the mounting plate, and the indicating structure 4 is located on the second side of the mounting plate. The indicating structure 4 is driven and cooperates with the first micro switch 121 and the second micro switch 122, respectively. The slider 24 is driven and cooperates with the third micro switch 123, and the turntable 23 is driven and cooperates with the fourth micro switch 124. When the circuit breaker is closed, the motor drives the turntable 23 to rotate in the closing direction. The turntable 23 drives the slider 24 to slide in a straight line, thereby driving the third micro switch 123 to switch states, indicating the closing state of the electric operating mechanism 1. The rotation of the turntable 23 simultaneously drives the indicating structure 4 to rotate in the closing direction, driving the first micro switch 121 to switch its state, indicating the closing state of the circuit breaker. When the circuit breaker is open, the motor drives the turntable 23 to rotate in the opening direction, thereby driving the fourth micro switch 124 to switch its state, indicating the opening state of the electric operating mechanism 1. The rotation of the turntable 23 simultaneously drives the indicating structure 4 to rotate in the opening direction, driving the second micro switch 122 to switch its state, indicating the opening state of the circuit breaker. When the indicating structure 4 is locked and cannot rotate to the opening indication position, the second micro switch 122 cannot be switched, thus correctly indicating the opening and closing states of the circuit breaker. Of course, the driving connection relationships between the turntable 23, the slider 24, and the indicating structure 4 and the first micro switch 121, the second micro switch 122, the third micro switch 123, and the fourth micro switch 124 can be adjusted and changed. For example, the turntable 23 drives the third micro switch 123 to switch its state, and the slider 24 drives the fourth micro switch 124 to switch its state, etc.

[0124] The first micro switch 121, the second micro switch 122, the third micro switch 123, and the fourth micro switch 124 are connected to the circuit board. The transmitted information is processed by the circuit board and transmitted to the electrical operating mechanism 1 and the circuit breaker status. Compared with the prior art, the addition of the third micro switch 123 and the fourth micro switch 124 for indicating the status of the electrical operating mechanism 1 can determine whether the circuit breaker status is abnormal by comparing the status of the circuit breaker and the status of the electrical operating mechanism 1. This prevents the first micro switch 121 and the second micro switch 122 from being unable to switch states due to abnormal contact adhesion, which would cause the motor to keep rotating and potentially cause the motor to stall. This also prevents motor burnout and spring failure. The circuit board can be connected to the central display screen to transmit the status of the electric operating mechanism 1 and / or the circuit breaker status to the central display screen. Alternatively, warning elements such as running lights or buzzers can be installed on the circuit board. After comparing the status of the electric operating mechanism 1 and the circuit breaker status, the circuit board displays whether the circuit breaker is in an abnormal state. For example, if the first micro switch 121 indicates that it is in the open state, while the third micro switch 123 indicates that it is in the closed state, it indicates that the circuit breaker status is abnormal, and there may be moving contact adhesion or other faults. At this time, the circuit board processes the information and issues a warning through running lights or buzzers.

[0125] Furthermore, the third micro switch 123 includes a third micro switch driving unit, and one side of the turntable 23 drives the third micro switch 123 to switch states by driving the third micro switch driving unit; as shown Figure 11 As shown, the slider 24 has a protruding toggle member 28 on the side facing the mounting plate. The toggle member 28 is used to drive the fourth micro switch 124 to switch states.

[0126] like Figure 1 As shown, the circuit breaker body housing includes a circuit breaker middle cover 26 and a circuit breaker base 27. The circuit breaker middle cover 26 is closed and connected to the circuit breaker base 27. The intermediate base 3 is closed and connected to the side of the circuit breaker middle cover 26 away from the circuit breaker base 27. The intermediate base 3 and the circuit breaker middle cover 26, and the circuit breaker middle cover 26 and the circuit breaker base 27 are connected by means of snap-fit, screw connection or riveting.

[0127] like Figure 1As shown, the housing includes a top cover 13 and a base 14. The top cover 13 is fitted onto the side of the base 14 away from the intermediate base 3. The intermediate base 3 and the base 14, and the top cover 13 and the base 14 are connected by snap-fit, screw connection, or riveting. The top cover 13 is provided with an indicator window 131, and the outer indicator disk 42 of the indicator structure 4 is opposite to the indicator window 131. The mounting plate is located inside the base 14, and a mounting base is provided on the mounting plate. The mounting base extends through the mounting plate and towards the top cover 13, where the indicator structure 4 is mounted. The other end extends towards the circuit breaker body 2, where a turntable 23 is mounted. The turntable 23 is mounted on the turntable 23 base. The motor drives the turntable 23 to rotate, which in turn drives the indicator structure 4 to rotate via the mounting base.

[0128] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0129] 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 protection scope of the present invention.

Claims

1. A circuit breaker, comprising a circuit breaker body (2) and an electric operating mechanism (1) stacked together, wherein the circuit breaker body (2) includes a circuit breaker body housing and a handle (21) disposed within the circuit breaker body housing, an operating mechanism, a rotatably disposed contact shaft (22), at least one moving contact disposed on the contact shaft (22), and a stationary contact corresponding to the moving contact; the operating mechanism is connected to the contact shaft (22); the handle (21) is connected to the operating mechanism and partially extends out of the circuit breaker body housing; the electric operating mechanism (1) includes a mechanism housing and an electric drive mechanism and an indicating structure (4) disposed within the mechanism housing; the electric drive mechanism drives the indicating structure (4) to rotate to the corresponding closing indicating position and opening indicating position, characterized in that: It also includes a locking structure, which is located between the contact shaft (22) and the indicator structure (4). The locking structure can be driven by the contact shaft (22) to lock the indicator structure (4). When the contact shaft (22) rotates and drives the moving contact to contact the stationary contact, the contact shaft (22) rotates so that the locking structure can lock the indicator structure (4), so that the indicator structure (4) can rotate, but cannot rotate from the closing indicator position to the opening indicator position. When the contact shaft (22) rotates and causes the moving contact to separate from the stationary contact, the rotation of the contact shaft (22) can release the locking structure from the locking of the indicator structure (4), and the indicator structure (4) can rotate from the closing indicator position to the opening indicator position.

2. The circuit breaker according to claim 1, characterized in that: The locking structure includes a push rod, at least one elastic element and a locking element (53). The indicating structure (4) is rotatably disposed in the mechanism housing. The locking element (53) is located in the mechanism housing. The push rod is connected between the locking element (53) and the contact shaft (22). When the contact shaft (22) rotates and drives the moving contact to contact the stationary contact, the contact shaft (22) drives the push rod to move and drive the locking element (53) or the elastic element to drive the locking element (53), so that the locking element (53) locks the indicating structure (4). When the contact shaft (22) rotates and causes the moving contact to separate from the stationary contact, the contact shaft (22) drives the top rod to move and drives the locking member (53) or the elastic member to drive the locking member (53), so that the locking member (53) releases the locking of the indicator structure (4), and the indicator structure (4) can rotate from the closing indicator position to the opening indicator position.

3. The circuit breaker according to claim 2, characterized in that, The push rod includes a first push rod (51) and a second push rod (52) located on the same straight line. The second push rod (52) is disposed in the circuit breaker body housing and drives the contact shaft (22). The first push rod (51) is disposed in the mechanism housing and drives the locking member (53). The first push rod (51) and the second push rod (52) are linearly movable and driven together. The first push rod (51) extends into the circuit breaker body housing and connects with the second push rod (52), or the second push rod (52) extends into the mechanism housing and connects with the first push rod (51). When the contact shaft (22) rotates and drives the moving contact to contact or separate from the stationary contact, it can drive the second push rod (52) to drive the first push rod (51), so that the second push rod (52) and the first push rod (51) move in a straight line and drive the locking member (53) to act.

4. The circuit breaker according to claim 1, characterized in that, The indicating structure (4) includes an outer indicating disk (42) and an inner bushing (43). The outer indicating disk (42) and the inner bushing (43) are flexibly connected and can drive each other to rotate and can rotate relative to each other. The electric drive mechanism is driven and connected to one of the outer indicating disk (42) or the inner bushing (43), and the locking mechanism is locked and engaged with the other of the outer indicating disk (42) or the inner bushing (43).

5. The circuit breaker according to claim 1, characterized in that, The indicating structure (4) is provided with a sliding limiting hole (41), which is locked in place with the locking structure. The locking structure can slide a free stroke within the sliding limiting hole (41).

6. The circuit breaker according to claim 4, characterized in that, The outer indicator disc (42) is provided with a sliding limit hole (41), which is locked in place with the locking structure, and the inner bushing (43) is driven in place with the electric drive mechanism; or, the inner bushing (43) is provided with a sliding limit hole (41), which is locked in place with the locking structure, and the outer indicator disc (42) is driven in place with the electric drive mechanism.

7. The circuit breaker according to claim 4, characterized in that, The outer indicator disk (42) includes an indicator layer (423) with a gradually decreasing cross-section along the axial direction, a locking member limiting layer (424), and a first micro switch driving layer (425). The outer side of the indicator layer (423) away from the first micro switch driving layer (425) is provided with an arc-shaped groove (426), and the inner side is provided with a status indicator mark (427). A second driving slope is provided on one side of the indicator layer (423) for driving the second micro switch (122) to switch states. The first micro switch driving layer (425) includes a first driving slope for driving the first micro switch (121) to switch states.

8. The circuit breaker according to claim 4 or 6, characterized in that, The outer indicator disk (42) includes a first through hole (421) in the middle, the inner bushing (43) is embedded in the first through hole (421), a third elastic element (422) is connected between the outer indicator disk (42) and the inner bushing (43), the inner bushing (43) is driven by an electric drive mechanism, and the outer indicator disk (42) is locked by a locking mechanism and is provided with a status indicator mark.

9. The circuit breaker according to claim 1, characterized in that, The electric operating mechanism also includes a first micro switch (121), a second micro switch (122), a third micro switch (123), a fourth micro switch (124), and a circuit board disposed in the mechanism housing. The first micro switch (121), the second micro switch (122), the third micro switch (123), and the fourth micro switch (124) are connected to the circuit board. The first micro switch (121) is used to transmit the circuit breaker closed state, the second micro switch (122) is used to transmit the circuit breaker open state, the third micro switch (123) is used to transmit the electric operating mechanism (1) closed state, and the fourth micro switch (124) is used to transmit the electric operating mechanism (1) open state.

10. The circuit breaker according to claim 9, characterized in that, The housing of the mechanism includes an internal mounting plate, a turntable (23) and a slider (24) on the first side of the mounting plate. The electric drive mechanism drives the slider (24) to move linearly through the turntable (23), thereby causing the handle (21) to swing to achieve electric closing and opening. The indicator structure (4) is located on the second side of the mounting plate. The indicator structure (4) is driven and cooperates with the first micro switch (121) and the second micro switch (122) respectively. The slider (24) is driven and cooperates with the third micro switch (123). The turntable (23) is driven and cooperates with the fourth micro switch (124).

11. The circuit breaker according to claim 2, characterized in that, The locking member (53) is integrally formed with the top rod. The locking member (53) includes a first bent part (531) and a first hook structure (532). The top rod, the first bent part (531) and the first hook structure (532) are bent and connected in sequence. The first hook structure (532) is limited and cooperates with the indicator structure (4).

12. The circuit breaker according to claim 11, characterized in that, The housing of the mechanism includes a first retaining wall (533) and a second retaining wall (534) opposite to each other. The first bent portion (531) is located between the first retaining wall (533) and the second retaining wall (534) to restrict the radial rotational degree of freedom of the push rod. A third retaining wall is provided between the first retaining wall (533) and the second retaining wall (534). The height of the third retaining wall is less than the height of the first retaining wall (533) and the second retaining wall (534) to restrict the axial movement degree of freedom of the push rod.

13. The circuit breaker according to claim 2, characterized in that, The locking member (53) includes a rotating shaft, a driving part (537) and a locking part (538). The locking member (53) is rotatably disposed in the housing of the mechanism through the rotating shaft. The driving part (537) and the locking part (538) are located at both ends of the rotating shaft. The push rod is driven and engaged with the driving part (537), and the locking part (538) is limited and engaged with the indicating structure (4).

14. The circuit breaker according to claim 1, characterized in that, It also includes an intermediate base (3) disposed between the electric operating mechanism (1) and the circuit breaker body (2), and the electric operating mechanism (1) and the circuit breaker body (2) are fixedly installed through the intermediate base (3).

15. The circuit breaker according to claim 3, characterized in that, The first push rod (51) includes a first push rod body, a first push rod driving part (512) that drives and cooperates with the locking member (53), and a first connecting part (513) that drives and cooperates with the second push rod (52). The first push rod driving part (512) and the first connecting part (513) are located at both ends of the first push rod body. The second push rod (52) includes a second push rod body, a second connecting part (522) that drives and cooperates with the first push rod (51), and a second push rod driving part (523) that drives and cooperates with the contact shaft (22). The second connecting part (522) and the second push rod driving part (523) are located at both ends of the second push rod body, and the second connecting part (522) drives and cooperates with the first connecting part (513).

16. The circuit breaker according to claim 15, characterized in that, The first connecting portion (513) includes an arc-shaped protrusion (5231), and the second connecting portion (522) includes an arc-shaped groove (5232). Alternatively, the first connecting portion (513) includes an arc-shaped groove (5232), and the second connecting portion (522) includes an arc-shaped protrusion (5231). The arc-shaped protrusion (5231) is at least partially located within the arc-shaped groove (5232) and abuts against the arc-shaped groove (5232).

17. The circuit breaker according to claim 3, characterized in that, The circuit breaker body housing is provided with a second through hole (11). The second through hole (11) has a funnel-shaped recessed groove (35) on the side facing the mechanism housing. The outer diameter of the funnel-shaped recessed groove (35) is larger than the diameter of the second through hole (11), and the inner diameter of the funnel-shaped recessed groove (35) is equal to the diameter of the second through hole (11). The first push rod (51) passes through the second through hole (11) and extends into the circuit breaker body housing to connect with the second push rod (52).

18. The circuit breaker according to claim 2, characterized in that, At least one elastic element includes a first elastic element (54), which is located inside the mechanism housing and connected to the locking element (53) for driving the locking element (53) to reset; and / or, at least one elastic element includes a second elastic element (55), which is located inside the mechanism housing or the circuit breaker body housing and connected to the top rod for driving the top rod to reset.

19. The circuit breaker according to claim 3, characterized in that, At least one elastic element includes a second elastic element (55), and an auxiliary contact module (25) is also provided inside the circuit breaker body housing. The auxiliary contact module (25) includes an auxiliary contact module (25) housing and a fifth micro switch (125) disposed inside the auxiliary contact module (25) housing. The second elastic element (55) and the second push rod (52) are located inside the auxiliary contact module (25) housing. The second elastic element (55) is connected to the second push rod (52) to drive the second push rod (52) to reset. The second push rod (52) is connected to the fifth micro switch (125) to drive the fifth micro switch (125) to switch states. One end of the second push rod (52) extends out of the auxiliary contact module (25) housing and is connected to the first push rod (51). The other end of the second push rod (52) extends out of the auxiliary contact module (25) housing and cooperates with the contact shaft (22).

20. The circuit breaker according to claim 10, characterized in that, The mechanism housing includes a mechanism top cover (13) and a mechanism base (14), and the circuit breaker body housing includes a circuit breaker middle cover (26) and a circuit breaker base (27). The mechanism base (14) is connected to the middle base (3), the mechanism top cover (13) covers the side of the mechanism base (14) away from the middle base (3), the circuit breaker middle cover (26) is connected to the circuit breaker base (27), and the middle base (3) covers the side of the circuit breaker middle cover (26) away from the circuit breaker base (27). The top cover (13) of the mechanism is provided with an indicator window (131), and the indicator structure (4) is opposite to the indicator window (131); the base (14) of the mechanism is provided with an installation plate, and the installation plate is provided with an installation base. The installation base extends through the installation plate and extends towards the top cover (13) of the mechanism to provide an indicator structure (4) base. The indicator structure (4) is installed on the indicator structure (4) base, and the other end extends towards the circuit breaker body (2) to provide a turntable (23) base. The turntable (23) is installed on the turntable (23) base.

Images