circuit breaker

Abstract

The utility model relates to the field of low voltage electrical apparatus, concretely relates to a circuit breaker, its electric operation mechanism is equipped with indicating part and jacks, and the first elastic part is connected with the jack, the jack stretches out the mechanism shell and stretches into the circuit breaker shell and corresponds with the pivot, the pivot increases the pivot drive part of eccentricity setting and cooperates with the jack cooperation part arranged in the jack end face, is used for controlling the jack lifting to drive indicating part switching different positions when the circuit breaker is closed or is opened or is tripped, realizes indicating circuit breaker state, whether the electric operation mechanism can satisfy electric operation isolation function or not can satisfy electric operation isolation function, and the jack cooperates with the pivot through being installed with the moving contact, can more accurate and intuitive indication moving contact's position, avoids the problem that the state of indicating state indication does not correspond with moving contact actual position because of contact sticking.

Description

Technical Field

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

[0002] Existing circuit breaker operating mechanisms have multiple indication methods. One indication method is an electrical signal, which uses a slider, cam device, and micro switch to indicate the contact status of the circuit breaker body. When the circuit breaker body contacts open or close, the handle position changes, which in turn affects the slider. The displacement of the slider is transmitted to the cam device through a crank arm structure. The rotation of the cam triggers the micro switch, which transmits an electrical signal to indicate the contact status of the circuit breaker body. However, this method has drawbacks. When contacts stick together, the position of the moving contact may not match the handle, slider, or cam device, making it impossible to accurately indicate the contact status of the circuit breaker body. Alternatively, it may fail to accurately indicate the contact status of the circuit breaker body when the slider does not return to its original position with the handle or when the operating mechanism is not energized, thus failing to meet the isolation function requirements. Utility Model Content

[0003] The purpose of this utility model is to overcome at least one defect of the prior art and provide a circuit breaker.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A circuit breaker includes a circuit breaker housing, a circuit breaker body disposed within the circuit breaker housing, and an electric operating mechanism disposed on the top side of the circuit breaker housing. The circuit breaker body includes a handle, an operating mechanism, a tripping mechanism, a rotatable shaft, at least one moving contact disposed on the shaft, and a stationary contact corresponding to the moving contact. The operating mechanism is connected to the shaft, and the handle is connected to the operating mechanism and partially extends out of the circuit breaker housing. The electric operating mechanism includes a mechanism housing and an electric operating mechanism body disposed within the mechanism housing. The electric operating mechanism also includes an indicator and a push rod respectively movably disposed within the mechanism housing, and a first elastic element connected to the push rod. The shaft has a shaft drive portion eccentrically disposed to the rotation center of the shaft. One end face of the push rod has a push rod mating portion that drives and cooperates with the shaft drive portion. The end of the push rod with the push rod mating portion extends out of the mechanism housing and into the circuit breaker housing. When the circuit breaker is closed, opened, or tripped, the shaft drives the moving contact to rotate and simultaneously drives the push rod, causing the push rod to drive the indicator to indicate the status of the circuit breaker.

[0006] Optionally, when the circuit breaker is closed, the rotating shaft drives the push rod through the rotating shaft drive unit to drive the push rod mating unit, causing the push rod drive indicator to move to the closing indication position, and the push rod drive first elastic element stores energy; when the circuit breaker is opened or tripped, the rotating shaft drives the rotating shaft drive unit to separate from the push rod mating unit, causing the first elastic element to release energy and drive the push rod, thereby moving the push rod drive indicator from the closing indication position to the opening indication position or the tripping indication position.

[0007] Optionally, the shaft drive unit is located on the end face of one end of the shaft in the axial direction, and the part of the push rod that extends into the circuit breaker housing is located between the end face of the shaft with the shaft drive unit and the side wall of the circuit breaker housing.

[0008] Optionally, the push rod is arranged to move linearly, the rotation center of the rotating shaft is perpendicular to the movement direction of the push rod, the rotating shaft driving part is a cylindrical structure arranged along the rotation center of the rotating shaft in the length direction, and its arc surface is driven to cooperate with the push rod mating part, the push rod mating part is a plane, and is perpendicular to the movement direction of the push rod.

[0009] Optionally, the electric operating mechanism further includes a push rod support, the push rod being linearly movable on the push rod support, and the first elastic element being connected between the push rod and the push rod support; the indicator element is rotatably mounted on the mechanism housing.

[0010] Optionally, the push rod includes a push rod body, a push rod driving part that drives and cooperates with an indicator, and a push rod mounting part that is slidably disposed on a push rod bracket. The push rod cooperating part and the push rod driving part are respectively disposed at both ends of the push rod body, and the push rod mounting part is disposed in the middle of the push rod body.

[0011] Optionally, the top rod bracket has an installation cavity and a guide groove located on the side wall of the installation cavity. The top rod mounting part is installed into the installation cavity and includes a guide block. One end of the guide block is slidably disposed in the guide groove and extends out of the guide groove to connect with the top rod body.

[0012] Optionally, the push rod bracket is provided with a through hole on the top wall of the mounting cavity, and the push rod mounting part further includes a mounting post, which is disposed on the end of the guide block away from the push rod body;

[0013] The first elastic element is a compression spring, which is installed in the mounting cavity. One end of the first elastic element abuts against the inner side of the top wall of the mounting cavity of the top rod bracket, and the other end is sleeved on the mounting post of the top rod and abuts against the guide block.

[0014] Optionally, the indicator includes an indicator body, an indicator portion and an indicator driven portion respectively disposed at both ends of the indicator body, wherein the indicator driven portion is driven to cooperate with the push rod driving portion.

[0015] Optionally, the push rod driving part is a push rod rack arranged along the moving direction of the push rod in the length direction; the indicator driven part is an indicator gear meshing with the push rod rack and located on the side perpendicular to the moving direction of the push rod rack.

[0016] Optionally, the push rod driving part is a push rod protrusion, the indicator driven part is an indicator protrusion, and the indicator protrusion is located on the moving path of the push rod protrusion; when the circuit breaker is closed, the push rod acts on the indicator protrusion through the push rod protrusion to drive the indicator to move to the closing indication position.

[0017] Optionally, the push rod further includes a push rod limiting part, which cooperates with the push rod bracket to limit the movement direction of the push rod, and is used to limit the push rod to be in the same position when the circuit breaker is tripped and tripped, so that the tripping indication position and the tripping indication position of the indicator coincide.

[0018] Optionally, the tripping indication position is located between the closing indication position and the tripping indication position.

[0019] Optionally, it also includes a common cover that serves as the front cover of the circuit breaker housing and the bottom cover of the mechanism housing. The two sides of the common cover are respectively connected to the circuit breaker housing and the mechanism housing. The common cover is provided with a clearance hole for avoiding the top rod bracket and the top rod. The top rod bracket is located in the clearance hole and fixed on the outside of the circuit breaker housing.

[0020] The circuit breaker of this utility model has an indicator and a push rod in its electric operating mechanism. A first elastic element is connected to the push rod. The push rod extends out of the mechanism housing and into the circuit breaker housing, corresponding to the rotating shaft. The rotating shaft has an eccentrically set rotating shaft drive part that cooperates with the push rod mating part set on the end face of the push rod. When the circuit breaker is closed, opened, or tripped, it is used to control the lifting and lowering of the push rod to drive the indicator to switch different positions, so as to indicate the status of the circuit breaker. The electric operating isolation function can be met regardless of whether the electric operating mechanism is energized. Moreover, the push rod, through cooperation with the rotating shaft on which the moving contact is installed, can more accurately and intuitively indicate the position of the moving contact, avoiding the problem of the indicated status not matching the actual position of the moving contact due to contact adhesion.

[0021] Furthermore, the shaft drive unit is located on the end face of one end of the shaft axial direction. The part of the push rod that extends into the circuit breaker housing is located between the end face of the shaft with the shaft drive unit and the side wall of the circuit breaker housing. That is, the shaft drive unit and the part of the push rod that extends into the circuit breaker housing are located on one side of all moving contacts, not directly above the moving contacts. The push rod is basically close to the side wall of the circuit breaker housing, occupying little space, without occupying the accessory slot of the circuit breaker, and without affecting other mechanisms of the circuit breaker housing.

[0022] Furthermore, the top rod, the first elastic element, and the top rod bracket form an integrated top rod assembly, which is flexible and convenient to install. It is also set separately from the indicator, which allows the top rod assembly to be designed as a slender structure, occupying only a narrow space. This makes it easy to arrange it reasonably and compactly in the mechanism housing and the circuit breaker housing without affecting other mechanisms.

[0023] In addition, the shared cover serves as both the front cover of the circuit breaker housing and the bottom cover of the mechanism housing, eliminating the need for an additional front cover on the circuit breaker housing, thus simplifying the structure and facilitating installation.

[0024] In addition, the push rod and the indicator are driven by a rack and pinion meshing, which provides high precision and allows the indicator to more accurately indicate the closing, opening, and tripping status of the circuit breaker. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of the circuit breaker when it is closed according to the first embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional view of the circuit breaker during the opening of the first embodiment of this utility model;

[0027] Figure 3 This is a cross-sectional view of the circuit breaker during tripping according to the first embodiment of this utility model;

[0028] Figure 4 This is a schematic diagram of the body and housing of the circuit breaker with the electric operating mechanism removed according to the first embodiment of this utility model;

[0029] Figure 5 This is a schematic diagram of the circuit breaker body and housing of the first embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the structure of the top cover of the present invention;

[0031] Figure 7 This is a schematic diagram of the top rod structure according to the first embodiment of this utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the indicator element according to the first embodiment of this utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the top rod support of this utility model;

[0034] Figure 10 This is a cross-sectional view of the circuit breaker during tripping according to the second embodiment of this utility model;

[0035] Figure 11 This is a schematic diagram of the top rod structure according to the second embodiment of this utility model;

[0036] Figure 12 This is a schematic diagram of the structure of the indicator element according to the second embodiment of this utility model.

[0037] Top rod bracket 100; mounting cavity 101; guide groove 102; through hole 103; top rod 200; top rod body 210; top rod mating part 211; top rod rack 220; guide block 230; mounting post 240; top rod limiting part 250; extrusion hole 251; top rod protrusion 260; first elastic element 300; indicator 400; indicator body 410; indicator part 420; indicator gear 430; finger Indicator protrusion 440; second elastic element 500; mechanism housing 600; mechanism top cover 610; indicator window 611; mounting block 612; mounting shaft 613; mechanism base 620; common cover 630; clearance hole 631; circuit breaker housing 700; circuit breaker middle cover 710; circuit breaker base 720; rotating shaft 810; rotating shaft drive part 811; moving contact 820; stationary contact 830; handle 840. Detailed Implementation

[0038] The specific embodiments of the circuit breaker of this utility model are further described below with reference to the accompanying drawings. The circuit breaker of this utility model is not limited to the descriptions in the following embodiments.

[0039] like Figure 1-9 The diagram shows a first embodiment of the circuit breaker.

[0040] like Figure 1 As shown, the circuit breaker of this embodiment includes a circuit breaker housing 700, a circuit breaker body disposed within the circuit breaker housing 700, and an electric operating mechanism disposed on the top side of the circuit breaker housing 700. The electric operating mechanism includes a mechanism housing 600 and an electric operating mechanism body disposed within the mechanism housing 600.

[0041] It should be noted that the circuit breaker body is existing technology and typically includes a handle 840 ( Figure 4The circuit breaker comprises an operating mechanism, a tripping mechanism, a rotating shaft 810, at least one moving contact 820 mounted on the shaft 810, and a stationary contact 830 corresponding to the moving contact 820. The operating mechanism is connected to the shaft 810, and a handle 840 is connected to the operating mechanism and extends at least partially beyond the circuit breaker housing 700. When the circuit breaker is closed or opened, the handle 840 drives the shaft 810 to rotate via the operating mechanism, causing the moving contact 820 to rotate with the shaft 810 and contact or disconnect with the stationary contact 830. The circuit breaker trips, connecting and disconnecting the main circuit to achieve closing and opening of the main circuit. When the circuit breaker trips (due to faults such as short circuit, overload, and leakage in the main circuit), the tripping mechanism drives the operating mechanism to trip. The operating mechanism drives the rotating shaft 810 to rotate, causing the moving contact 820 to separate from the stationary contact 830, thus disconnecting the main circuit and achieving 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 protection mechanism. The electric operating mechanism is installed on the top side of the circuit breaker body. The electric operating mechanism body typically includes an electric drive mechanism and a slider. The slider has a drive groove that fits onto the part of the handle 840 that extends out of the circuit breaker housing 700. The electric drive mechanism drives the slider to move linearly, causing the handle 840 to swing, thus achieving electric closing and opening. The electric drive mechanism can be a motor or an electromagnetic mechanism, etc. The electric operating mechanism also includes a manual operating component. By rotating the manual operating component, the slider is driven to move linearly, thus achieving manual closing and opening. This is prior art in the field and will not be described in detail here.

[0042] The electric operating mechanism also includes an indicating structure disposed within the mechanism housing 600. This indicating structure extends out of the mechanism housing 600 and into the circuit breaker housing 700, engaging with the rotating shaft 810 of the circuit breaker body to indicate the status of the circuit breaker. The indicating structure includes an indicating element 400 and a push rod 200, both movably disposed within the mechanism housing 600, and a first elastic element 300 connected to the push rod 200. The push rod 200 extends out of the mechanism housing 600 and into the circuit breaker housing 700, corresponding to the rotating shaft 810. The rotating shaft 810 of the circuit breaker body drives the indicating element 400 via the push rod 200. When the circuit breaker is closed, open, or tripped, the rotating shaft 810 drives the push rod 200, causing the push rod 200 to drive the indicating element 400 to rotate to the corresponding closed, open, or tripped position. The indicating structure can indicate only the closed and open states of the circuit breaker (without distinguishing between open and tripped), or it can indicate all three states: closed, open, and tripped.

[0043] Specifically, the rotating shaft 810 is provided with a rotating shaft drive part 811 eccentrically positioned with respect to the rotation center of the rotating shaft 810. One end face of the push rod 200 is provided with a push rod mating part 211 that drives and engages with the rotating shaft drive part 811. One end of the push rod 200 of the indicating structure, with the push rod mating part 211, extends out of the mechanism housing 600 and into the circuit breaker housing 700. When the circuit breaker closes, opens, or trips, the rotating shaft 810 drives the moving contact 820 to rotate while simultaneously driving the push rod 200, causing the push rod 200 to drive the indicating element 400 to indicate the closed, opened, or tripped state of the circuit breaker. In this embodiment, the push rod 200 is linearly movable, and the indicating element 400 is rotatably movable; for example... Figure 1 As shown, when the circuit breaker is closed, the rotating shaft 810, through the rotating shaft drive part 811, acts on the push rod mating part 211 to drive the push rod 200 to move upward, causing the push rod 200 to drive the indicator 400 to rotate to the closing indication position, and the push rod 200 drives the first elastic element 300 to store energy; as Figure 2-3 As shown, when the circuit breaker opens or trips, the rotating shaft 810 drives the rotating shaft drive part 811 to separate from the push rod mating part 211, causing the first elastic element 300 to release energy and drive the push rod 200 to move downwards. This causes the push rod 200 to drive the indicator 400 to rotate from the closing indicator position to the opening indicator position or the tripping indicator position. In this embodiment, the circuit breaker's operating mechanism includes an indicator 400 and a push rod 200. The first elastic element 300 is connected to the push rod 200. The push rod 200 extends out of the mechanism housing 600 and into the circuit breaker housing 700, corresponding to the rotating shaft 810. The rotating shaft 810 has an eccentrically positioned rotating shaft drive part 811 that engages with the push rod mating part 211 located on the end face of the push rod 200. During the circuit breaker's closing, opening, and tripping, this part controls the lifting and lowering of the push rod 200 to drive the indicator 400 to switch between different positions, thus achieving indication. The circuit breaker can meet the electrical isolation function regardless of whether the electrical operating mechanism is energized or not, whether it is in the closed, open, or tripped state. It has a simple structure and low precision requirements. When the circuit breaker is open, the first elastic element 300 drives the rotating shaft 810 to rotate in the opening direction through the top rod 200, which helps the circuit breaker to open quickly. Moreover, the rotating shaft 810, which is equipped with the moving contact 820, can more accurately and intuitively indicate the position of the moving contact 820, avoiding the problem of the indicated state not matching the actual position of the moving contact 820 due to contact adhesion.

[0044] Furthermore, the electric operating mechanism also includes a push rod support 100, on which the push rod 200 is linearly movably mounted. The first elastic element 300 is connected between the push rod 200 and the push rod support 100. The indicator 400 is rotatably mounted on the mechanism housing 600. The push rod 200, the first elastic element 300, and the push rod support 100 form an integrated push rod assembly, which is flexible and convenient to install. Furthermore, its separate arrangement from the indicator 400 allows for a slender overall design of the push rod assembly, occupying only a narrow space. This facilitates a reasonable and compact arrangement within the mechanism housing 600 and the circuit breaker housing 700 without affecting other mechanisms.

[0045] Furthermore, such as Figure 3 , Figure 4 As shown, the shaft drive unit 811 is located on the end face of one axial end of the shaft 810. The portion of the push rod 200 extending into the circuit breaker housing 700 is located between the end face of the shaft 810 with the shaft drive unit 811 and the side wall of the circuit breaker housing 700. That is, the portions of the shaft drive unit 811 and the push rod 200 extending into the circuit breaker housing 700 are located on one side of all moving contacts 820. This solves the problems of existing mechanical switching indication methods that use a shaft to change the position of an indicator to indicate the state of the circuit breaker body contacts, which are unsuitable for circuit breakers with electric operating mechanisms and require a large space within the circuit breaker body. In this embodiment, the portions of the shaft drive unit 811 and the push rod 200 extending into the circuit breaker housing 700 are not located directly above the moving contacts 820. The push rod 200 is basically close to the side wall of the circuit breaker housing 700, occupying little space, not requiring the use of the circuit breaker's accessory slot, and not affecting other mechanisms of the circuit breaker housing 700. The rotating shaft drive part 811 is a boss structure protruding from one end face of the rotating shaft 810 along its axial direction. Preferably, the rotation center of the rotating shaft 810 is perpendicular to the moving direction of the push rod 200. The rotating shaft drive part 811 is a cylindrical structure with its length direction along the rotation center of the rotating shaft 810. Its arc surface drives and engages with the push rod mating part 211. The push rod mating part 211 is a plane, parallel to the rotation center of the rotating shaft 810, and perpendicular to the moving direction of the push rod 200. Of course, the rotating shaft drive part 811 can also be a square or other shaped boss structure, and the push rod mating part 211 can be an arc surface or other structure; or the push rod mating part 211 can be a boss structure, and the rotating shaft drive part 811 can be a hole, groove, or other mating structure that mates with the boss structure. Of course, as another embodiment, the shaft drive unit 811 can also be arranged radially at one end of the axial direction of the shaft 810, also located on one side of all moving contacts 820, with the push rod 200 substantially close to the side wall of the circuit breaker housing 700. As another inferior embodiment, the shaft drive unit 811 is arranged radially in the middle of the shaft 810.

[0046] like Figure 1 , 4As shown in Figure 5, the circuit breaker in this embodiment also includes a common cover 630, which serves as both the front cover of the circuit breaker housing 700 and the bottom cover of the mechanism housing 600. The two sides of the common cover 630 are respectively connected to and closed onto the circuit breaker housing 700 and the mechanism housing 600. The common cover 630 is provided with clearance holes 631 for accommodating the top rod bracket 100 and the top rod 200. The top rod bracket 100 is located within the clearance holes 631 and fixed to the outer side of the circuit breaker housing 700. The top rod bracket 100 and the circuit breaker housing 700 are connected by means of snap-fit, screw connection, or riveting. Since the common cover 630 serves as both the front cover of the circuit breaker housing 700 and the bottom cover of the mechanism housing 600, the circuit breaker housing 700 does not require an additional front cover, simplifying the structure and facilitating installation.

[0047] The circuit breaker installation method in this embodiment is flexible and selectable. One installation method is that the first elastic element 300 is installed on the top rod 200 and together they are installed on the top rod bracket 100 to form a top rod assembly; the electric operating mechanism body is installed in the mechanism housing 600, and the common cover 630 is closed and connected with the mechanism housing 600 to form a first electric operating module; firstly, the top rod bracket 100 of the top rod assembly is fixed on the outside of the circuit breaker housing 700, and then the common cover 630 in the first electric operating module is closed on the outside of the circuit breaker housing 700.

[0048] Another installation method is that the first elastic element 300 is mounted on the top rod 200 and together they are mounted on the top rod bracket 100 to form a top rod assembly; the top rod assembly and the electric operating mechanism body are respectively installed into the mechanism housing 600, and the common cover 630 is connected to the mechanism housing 600 to form a second electric operating module; the common cover 630 in the second electric operating module is closed on the outside of the circuit breaker housing 700.

[0049] like Figure 1 , 4 As shown, the circuit breaker housing 700 includes a circuit breaker middle cover 710 and a circuit breaker base 720. The circuit breaker middle cover 710 is closed and connected to the circuit breaker base 720. The common cover 630 is closed and connected to the side of the circuit breaker middle cover 710 away from the circuit breaker base 720. The common cover 630 and the circuit breaker middle cover 710, and the circuit breaker middle cover 710 and the circuit breaker base 720 are connected by means of snap-fit, screw connection or riveting.

[0050] like Figure 1 , 5As shown in Figure 6, the mechanism housing 600 includes a mechanism top cover 610 and a mechanism base 620. The mechanism top cover 610 is fitted onto the side of the mechanism base 620 away from the common cover 630. The common cover 630 and the mechanism top cover 610, and the mechanism top cover 610 and the mechanism base 620 are connected by means of snap-fit, screw connection, or riveting. The mechanism top cover 610 is provided with an indicator window 611. A mounting block 612 protrudes from the inner side of the mechanism top cover 610. The mounting block 612 is provided with a mounting shaft 613 that is rotatably connected to the indicator 400. The axis of the mounting shaft 613 is the rotation center of the indicator 400, parallel to the rotation center of the rotating shaft 810, and perpendicular to the movement direction of the top rod 200.

[0051] like Figure 1 As shown, the indicating structure of the electric operating mechanism in this embodiment further includes a second elastic element 500 connected to the indicating element 400. When the indicating element 400 rotates to the closed indicating position, the second elastic element 500 is driven to store energy. When the second elastic element 500 releases energy, it drives the indicating element 400 to rotate from the closed indicating position to the open indicating position or the tripping indicating position. The second elastic element 500 is preferably a torsion spring, which is sleeved on the mounting shaft 613 of the mechanism top cover 610, and its two ends are respectively connected to the mounting block 612 of the mechanism top cover 610 and the indicating element 400.

[0052] like Figure 1 , 7 As shown, the push rod 200 in this embodiment includes a push rod body 210, a push rod driving part that drives and cooperates with the indicator 400, and a push rod mounting part that is slidably disposed on the push rod bracket 100. The push rod cooperating part 211 and the push rod driving part are respectively disposed at both ends of the push rod body 210, and the push rod mounting part is disposed in the middle of the push rod body 210.

[0053] Preferably, the push rod body 210 has a slender structure, with its two ends arranged parallel to each other and its length direction arranged along the moving direction of the push rod 200. The length direction of the middle part of the push rod body 210 is perpendicular to the moving direction of the push rod 200 and is vertically connected between the two ends of the push rod body 210.

[0054] Preferably, the top rod bracket 100 is provided with a mounting cavity 101, a guide groove 102 located on the side wall of the mounting cavity 101, and a through hole 103 located on the top wall of the mounting cavity 101. The top rod mounting part of the top rod 200 is installed in the mounting cavity 101, including a guide block 230 and a mounting post 240. One end of the guide block 230 is slidably disposed in the guide groove 102 and extends out of the guide groove 102 from the mounting cavity 101 to connect with the top rod body 210. The mounting post 240 is disposed on the end of the guide block 230 away from the top rod body 210. The first elastic element 300 is a compression spring, installed in the mounting cavity 101. One end of the first elastic element 300 abuts against the inner side of the top wall of the mounting cavity 101 of the top rod bracket 100, and the other end is sleeved on the mounting post 240 of the top rod 200 and abuts against the guide block 230.

[0055] Furthermore, the top rod 200 also includes a top rod limiting part 250. Specifically, the top rod limiting part 250 is a truncated cone, disposed on the end of the mounting post 240 extending out of the mounting cavity 101. The outer diameter of the connection between the top rod limiting part 250 and the mounting post 240 is larger than the outer diameter of the mounting post 240 and larger than the inner diameter of the through hole 103, so that the part of the top rod limiting part 250 protruding from the mounting post 240 is limited and fitted with the outer side of the top wall of the mounting cavity 101. Furthermore, the connection between the top rod limiting part 250 and the mounting post 240 is a hollow structure with a compression hole 251, so that it can pass smoothly through the through hole 103 by being compressed and deformed at the connection between the top rod limiting part 250 and the mounting post 240 during installation.

[0056] There are at least two limiting methods for the push rod 200 and the push rod support 100. The first limiting method is that the push rod limiting part 250 provided on the push rod 200 and the push rod support 100 are engaged in a limiting cooperation in the moving direction of the push rod 200. This is used to limit the push rod 200 to be in the same position when the circuit breaker is tripped and when the circuit breaker is tripped (that is, the height position of the push rod 200 is the same when the circuit breaker is tripped and when the circuit breaker is tripped, indicating only that the circuit breaker is in the open state, without distinguishing between normal tripping and tripping tripping), so that the tripping indication position of the indicator 400 coincides with the tripping indication position. In this embodiment, when the circuit breaker is closed, the rotating shaft 810, through the rotating shaft drive part 811, acts on the push rod mating part 211 to drive the push rod 200 to move upward to the highest point, causing the push rod 200 to drive the indicator 400 to rotate to the closing indication position; when the circuit breaker is opened or tripped, because the rotating shaft 810 drives the rotating shaft drive part 811 to separate from the push rod mating part 211, the first elastic element 300 releases energy to drive the push rod 200 downward to the position when the circuit breaker is opened, due to the push rod limiting part 211... When the push rod 200 is limited by the limit engagement of the push rod bracket 100, the push rod 200 cannot move further downward. As a result, the push rod 200 drives the indicator 400 to rotate from the closing indicator position to the opening indicator position, i.e., the tripping indicator position. That is, when the circuit breaker is tripped, the push rod engagement part 211 re-engages with the rotating shaft drive part 811. When the circuit breaker trips, the push rod 200 is blocked by the push rod bracket 100 through the push rod limit part 250, and the push rod engagement part 211 cannot move down to engage with the rotating shaft drive part 811.

[0057] The second limiting method is that the push rod bracket 100 does not limit the push rod 200; or the push rod 200 has a push rod limiting part 250 that cooperates with the push rod bracket 100 in the moving direction of the push rod 200 to limit the position of the push rod 200 when the circuit breaker trips, so that the tripping indication position is located between the closing indication position and the tripping indication position, that is, as shown in the figure. Figure 1As shown, when the circuit breaker is closed, the distance between the push rod limiting part 250 and the top wall of the mounting cavity 101 of the push rod bracket 100 is d. The distance d in the second limiting method is greater than the distance d in the first limiting method. In this embodiment, when the circuit breaker is closed, the rotating shaft 810 drives the push rod 200 to move upward to the highest point through the rotating shaft driving part 811 acting on the push rod mating part 211, causing the push rod 200 to drive the indicator 400 to rotate to the closing indication position; when the circuit breaker is opened, since the rotating shaft 810 drives the rotating shaft driving part 811 to separate from the push rod mating part 211, the first elastic element 300 releases energy to drive the push rod 200 to move downward a certain distance until the push rod mating part 211 re-engages with the rotating shaft driving part 211. When the moving part 811 contacts, the push rod 200 drives the indicator 400 to rotate from the closing indicator position to the opening indicator position; when the circuit breaker trips, the rotating shaft 810 drives the rotating shaft drive part 811 to separate from the push rod mating part 211, so that the first elastic element 300 releases energy to drive the push rod 200 to move downward to the lowest point (the push rod mating part 211 re-contacts the rotating shaft drive part 811), thereby the push rod 200 drives the indicator 400 to rotate from the closing indicator position to the tripping indicator position.

[0058] like Figure 1 , 8 As shown, the indicator 400 in this embodiment includes an indicator body 410, indicator portions 420 and indicator driven portions respectively disposed at both ends of the indicator body 410. The indicator driven portion is driven and cooperates with the push rod driving portion. The indicator portion 420 corresponds to the indicator window 611 of the mechanism top cover 610. The indicator portion 420 is preferably an arc-shaped plate with the rotation center of the indicator 400 as the center. An indicator mark is provided on the outer arc surface of the indicator portion 420 facing away from the indicator body 410 and facing the indicator window 611. Different indicator marks are aligned with the indicator window 611 when the indicator 400 is rotated to the closing indicator position, the opening indicator position, and the tripping indicator position, thereby indicating the closing, opening, and tripping status of the circuit breaker. The indicator mark can be one or more combinations of colors, text, graphics, etc.

[0059] In this embodiment, the transmission structure between the push rod 200 and the indicator 400 features a push rod drive unit that is a push rod rack 220 arranged along the length direction of the push rod 200's movement. The indicator driven unit of the indicator 400 is an indicator gear 430 meshing with the push rod rack 220 and located on the side perpendicular to the movement direction of the push rod rack 220. The push rod 200 and the indicator 400 are driven by the meshing of the push rod rack 220 and the indicator gear 430, resulting in high precision and enabling the indicator 400 to more accurately indicate the closing, opening, and tripping status of the circuit breaker.

[0060] In this embodiment, the indicator gear 430 is rotatably connected to the mounting shaft 613 of the mechanism top cover 610; the indicator body 410 is similar to a triangular plate structure, with one corner connected to the inner arc surface of the indicator part 420 facing away from the indicator window 611, and the common side of the other two corners connected to the indicator gear 430.

[0061] like Figure 10-12 The diagram shows a second embodiment of the circuit breaker.

[0062] The difference from the first embodiment lies in the transmission structure between the push rod 200 and the indicator 400. In this embodiment, the push rod driving part of the push rod 200 is the push rod protrusion 260, and the indicator driven part of the indicator 400 is the indicator protrusion 440. The indicator protrusion 440 is located on the moving path of the push rod protrusion 260. When the circuit breaker is closed, the push rod 200 drives the indicator 400 to rotate to the closed indication position through the push rod protrusion 260 acting on the indicator protrusion 440. The push rod 200 and the indicator 400 are driven by the push rod protrusion 260 and the indicator protrusion 440 through a push-pull transmission, which is simple in structure.

[0063] In this embodiment, the indicator body 410 is rotatably connected to the mounting shaft 613 of the mechanism top cover 610. Preferably, the rotatable connection between the indicator body 410 and the mounting shaft 613, the connection between the indicator body 410 and the indicator protrusion 440, and the connection between the indicator body 410 and the indicator part 420 are located at the three vertices of a triangle.

[0064] 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.

[0065] 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 housing (700), a circuit breaker body disposed within the circuit breaker housing (700), and an electric operating mechanism disposed on the top side of the circuit breaker housing (700), wherein the circuit breaker body comprises a handle (840), an operating mechanism, a tripping mechanism, a rotatably disposed shaft (810), at least one moving contact (820) disposed on the shaft (810), and a stationary contact (830) corresponding to the moving contact (820); the operating mechanism is connected to the shaft (810); the handle (840) is connected to the operating mechanism and partially extends outside the circuit breaker housing (700); the electric operating mechanism comprises a mechanism housing (600) and an electric operating mechanism body disposed within the mechanism housing (600), characterized in that: The electric operating mechanism also includes an indicator (400) and a push rod (200) respectively mounted in the mechanism housing (600), a first elastic element (300) connected to the push rod (200), a rotating shaft (810) having a rotating shaft drive part (811) eccentrically mounted to the rotation center of the rotating shaft (810), a push rod mating part (211) having one end face of the push rod (200) having a push rod mating part (211) that drives and cooperates with the rotating shaft drive part (811), and one end of the push rod (200) having the push rod mating part (211) extending out of the mechanism housing (600) and into the circuit breaker housing (700); when the circuit breaker is closed, opened or tripped, the rotating shaft (810) drives the moving contact (820) to rotate while driving the push rod (200), so that the push rod (200) drives the indicator (400) to indicate the status of the circuit breaker.

2. The circuit breaker according to claim 1, characterized in that: When the circuit breaker is closed, the rotating shaft (810) acts on the push rod mating part (211) through the rotating shaft drive part (811) to drive the push rod (200), so that the push rod (200) drives the indicator (400) to move to the closing indication position, and the push rod (200) drives the first elastic element (300) to store energy; when the circuit breaker is opened or tripped, the rotating shaft (810) drives the rotating shaft drive part (811) to separate from the push rod mating part (211), so that the first elastic element (300) releases energy to drive the push rod (200), so that the push rod (200) drives the indicator (400) to move from the closing indication position to the opening indication position or the tripping indication position.

3. The circuit breaker according to claim 1, characterized in that: The shaft drive unit (811) is located on the end face of one axial end of the shaft (810), and the part of the push rod (200) that extends into the circuit breaker housing (700) is located between the end face of the shaft (810) where the shaft drive unit (811) is located and the side wall of the circuit breaker housing (700).

4. The circuit breaker according to claim 1, characterized in that: The push rod (200) is linearly movable. The rotation center of the rotating shaft (810) is perpendicular to the moving direction of the push rod (200). The rotating shaft drive part (811) is a cylindrical structure with its length direction along the rotation center of the rotating shaft (810). Its arc surface is driven to cooperate with the push rod mating part (211). The push rod mating part (211) is a plane and is perpendicular to the moving direction of the push rod (200).

5. The circuit breaker according to claim 2, characterized in that: The electric operating mechanism also includes a push rod support (100), the push rod (200) is linearly movable on the push rod support (100), the first elastic element (300) is connected between the push rod (200) and the push rod support (100); the indicator (400) is rotatably disposed on the mechanism housing (600).

6. The circuit breaker according to claim 5, characterized in that: The push rod (200) includes a push rod body (210), a push rod driving part that drives and cooperates with the indicator (400), and a push rod mounting part that is slidably disposed on the push rod bracket (100). The push rod cooperating part (211) and the push rod driving part are respectively disposed at both ends of the push rod body (210), and the push rod mounting part is disposed in the middle of the push rod body (210).

7. The circuit breaker according to claim 6, characterized in that: The top rod bracket (100) is provided with an installation cavity (101) and a guide groove (102) located on the side wall of the installation cavity (101). The top rod mounting part is installed in the installation cavity (101) and includes a guide block (230). One end of the guide block (230) is slidably disposed in the guide groove (102) and extends out of the guide groove (102) from the installation cavity (101) to connect with the top rod body (210).

8. The circuit breaker according to claim 7, characterized in that: The top rod bracket (100) is provided with a through hole (103) on the top wall of the mounting cavity (101), and the top rod mounting part also includes a mounting post (240), which is disposed on the end of the guide block (230) away from the top rod body (210); The first elastic element (300) is a compression spring, which is installed in the mounting cavity (101). One end of the first elastic element (300) abuts against the inner side of the top wall of the mounting cavity (101) of the top rod bracket (100), and the other end is sleeved on the mounting post (240) of the top rod (200) and abuts against the guide block (230).

9. The circuit breaker according to claim 6, characterized in that: The indicator (400) includes an indicator body (410), an indicator portion (420) respectively disposed at both ends of the indicator body (410), and an indicator driven portion, wherein the indicator driven portion is driven in cooperation with the push rod drive portion.

10. The circuit breaker according to claim 9, characterized in that: The push rod driving part is a push rod rack (220) arranged in the length direction along the moving direction of the push rod (200); the indicator driven part is an indicator gear (430) meshing with the push rod rack (220) and located on the side perpendicular to the moving direction of the push rod rack (220).

11. The circuit breaker according to claim 9, characterized in that: The push rod driving part is a push rod protrusion (260), and the indicator driven part is an indicator protrusion (440). The indicator protrusion (440) is located on the moving path of the push rod protrusion (260). When the circuit breaker is closed, the push rod (200) acts on the indicator protrusion (440) through the push rod protrusion (260) to drive the indicator (400) to move to the closing indication position.

12. The circuit breaker according to any one of claims 5-11, characterized in that: The top rod (200) also includes a top rod limiting part (250), which cooperates with the top rod bracket (100) in the moving direction of the top rod (200) to limit the top rod (200) to be in the same position when the circuit breaker is tripped and tripped, so that the tripping indication position and the tripping indication position of the indicator (400) coincide.

13. The circuit breaker according to any one of claims 5-11, characterized in that: The tripping indication position is located between the closing indication position and the tripping indication position.

14. The circuit breaker according to claim 5, characterized in that: It also includes a common cover (630) that serves as the face cover of the circuit breaker housing (700) and the bottom cover of the mechanism housing (600). The two sides of the common cover (630) are respectively connected to the circuit breaker housing (700) and the mechanism housing (600). The common cover (630) is provided with a clearance hole (631) for avoiding the top rod bracket (100) and the top rod (200). The top rod bracket (100) is located in the clearance hole (631) and fixed on the outside of the circuit breaker housing (700).

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