Opening and closing state feedback device and circuit breaker

Abstract

The utility model provides an opening and closing state feedback device and a circuit breaker, and relates to the technical field of electrical equipment. An indicating piece of the opening and closing state feedback device is rotationally connected to a support with a fixed position, the end, close to a moving contact, of the indicating piece is located on the rotating path of the moving contact, the end, away from the moving contact, of the indicating piece is provided with an indicating part, and the indicating part is provided with an opening identifier and a closing identifier. One end of the elastic member is connected with the support and the other end is connected with the indicating member. And when the indicating piece is pushed by the moving contact to positively rotate relative to the bracket until the circuit breaker is switched on, the switching-on identifier feeds back the switching-on state of the circuit breaker. And in the forward rotation process of the indicating piece, the elastic piece stores energy. The support is provided with a limiting part, when the abutting force on the indicating piece is removed, the elastic piece releases energy and drives the indicating piece to rotate reversely, and when the indicating piece rotates reversely to abut against the limiting part, the opening identification feeds back the opening state of the circuit breaker. The use number of parts can be reduced, the assembly difficulty of the feedback device is reduced, and the assembly efficiency of the feedback device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a closing and opening state feedback device and a circuit breaker. BACKGROUND

[0002] In the power system, the circuit breaker is an important device for power distribution and transmission, which can close, carry and open the current in the circuit. When an overload, short circuit or other fault occurs in the power system, the circuit breaker can quickly cut off the circuit through the opening to prevent the fault from expanding and ensure the stable operation of the power system.

[0003] In order to clearly understand the working state of the circuit breaker, a closing and opening state feedback device is usually arranged on the shell of the circuit breaker to feedback whether the circuit breaker is in the opening state or the closing state through the auxiliary mechanism of the closing and opening state feedback device.

[0004] However, the existing closing and opening state feedback device has the disadvantages of complex structure and large number of parts, which makes the assembly of the closing and opening state feedback device difficult and low in efficiency. CONTENT OF THE INVENTION

[0005] The present application provides a closing and opening state feedback device and a circuit breaker to reduce the number of parts, reduce the assembly difficulty and improve the assembly efficiency of the closing and opening state feedback device while realizing the function of the closing and opening state feedback device.

[0006] In the first aspect, the present application provides a closing and opening state feedback device, which is applied to a circuit breaker including a moving contact. The closing and opening state feedback device includes a bracket, an indicating piece and an elastic piece. The position of the bracket is fixed. The indicating piece is rotationally connected to the bracket, one end of the indicating piece close to the moving contact is located on the rotation path of the moving contact, the other end of the indicating piece away from the moving contact is provided with an indicating part, the indicating part is provided with an opening mark and a closing mark. One end of the elastic piece is connected with the bracket, and the other end of the elastic piece is connected with the indicating piece.

[0007] The indicating piece is pushed by the moving contact, and the indicating piece is positively rotated relative to the bracket to the closing state of the circuit breaker, and the closing mark feedbacks the closing state of the circuit breaker. During the positive rotation of the indicating piece, the elastic piece stores energy. The bracket is provided with a limiting part located on the rotation path of the indicating piece. When the pushing force on the indicating piece is removed, the elastic piece releases energy and drives the indicating piece to reverse rotation, and when the indicating piece reverses to abut against the limiting part, the opening mark feedbacks the opening state of the circuit breaker.

[0008] The above scheme makes the on-off state feedback device have the function of circuit breaker on-off state feedback. The indicating piece is rotationally connected to the fixed support, so that the support can fix the position of the rotation center of the indicating piece. In addition, the support is provided with a limiting portion, which is located on the rotation path of the indicating piece, so that the support can limit the rotation amplitude of the indicating piece during reverse rotation of the indicating piece, and further limit the position of the indicating piece in the off state. It can be seen that the support not only plays the role of installing the indicating piece, but also plays the role of limiting the position of the indicating piece. The support has multiple functions, and the function of the support is multiplexed. Therefore, the number of parts used in the implementation of the on-off state feedback function is small, which saves the number of parts used, and the overall structure of the on-off state feedback device is relatively simple, the assembly difficulty is small, and the assembly efficiency is high.

[0009] In a possible design, the support includes a first mounting plate and a limiting plate connected to each other, the limiting plate is bent towards the movable contact relative to the first mounting plate, the indicating piece is rotationally connected to the limiting plate, and the first mounting plate is used to fix the support to the housing of the circuit breaker. In the arrangement direction of the limiting plate and the indicating piece, part of the first mounting plate has a protruding portion relative to the limiting plate, and the limiting portion is arranged on the protruding portion.

[0010] Through the above scheme, the limiting plate is bent towards the movable contact relative to the first mounting plate, so that the limiting plate and the first mounting plate are not coplanar. In this way, when the first mounting plate is fixed to the housing of the circuit breaker to fix the position of the support, the indicating piece rotationally connected to the limiting plate can rotate relative to the limiting plate without being interfered by the housing. In addition, the protruding portion is arranged, so that at least the limiting portion in the first mounting plate can be located on the rotation path of the indicating piece to limit the rotation of the indicating piece, so that the indicating piece can be in an accurate position, thereby facilitating accurate feedback of the on-off state of the circuit breaker through the indicating piece.

[0011] In a possible design, the limiting portion is configured as a side of the protruding portion close to the limiting plate. Alternatively, the limiting portion is configured as a limiting groove arranged on the side of the protruding portion close to the limiting plate.

[0012] Through the above scheme, no matter what structure the limiting portion has, the limiting portion can play a role in limiting the rotation amplitude of the indicating piece.

[0013] In a possible design, the limiting plate is integrally formed with a boss, and the indicating piece is provided with a matching hole. Alternatively, the indicating piece is integrally formed with a boss, and the limiting plate is provided with a matching hole. The boss and the matching hole are matched to rotationally connect the indicating piece to the limiting plate.

[0014] Through the above scheme, one of the limiting plate and the indicating piece is provided with a boss, and the other is provided with a matching hole, the boss is inserted into the matching hole, or the matching hole is sleeved on the boss or is ridden on the boss under the action force of the elastic piece, so that the cooperation of the boss and the matching hole is realized. In this way, the indicating piece can be rotatably connected to the limiting plate and can be rotated in a forward direction or a reverse direction relative to the limiting plate, and the installation difficulty is small and the installation process is simple.

[0015] The boss is integrally formed on the limiting plate or the indicating piece, which can not only save the assembly process of the boss and the limiting plate or the boss and the indicating piece, reduce the assembly difficulty, and improve the overall assembly efficiency of the on-off state feedback device, but also does not need to additionally provide a structure for acting as a rotating shaft, thereby saving the number of parts used and further reducing the assembly difficulty and improving the overall assembly efficiency of the on-off state feedback device.

[0016] In a possible design, the on-off state feedback device further includes a mounting shaft, an end portion of the mounting shaft being fixed to the shell. The limiting plate is provided with a first slot hole, and the indicating piece is provided with a second slot hole. The mounting shaft is arranged through the first slot hole and the second slot hole to rotatably connect the indicating piece to the limiting plate.

[0017] Through the arrangement of the mounting shaft at the end portion of the shell and arranged through the first slot hole and the second slot hole, the indicating piece can be rotatably connected to the limiting plate and can be rotated relative to the limiting plate. In this way, the implementation mode of the rotatable connection of the indicating piece to the limiting plate is diversified, and the selectivity and operability are high.

[0018] In a possible design, the bracket further includes a second mounting plate connected to the first mounting plate, the second mounting plate and the limiting plate are located on opposite sides of the first mounting plate, and the second mounting plate is bent away from the moving contact relative to the first mounting plate. The on-off state feedback device further includes a micro switch, and the micro switch is mounted on the side of the second mounting plate facing the indicating piece. When the circuit breaker is in the on-off state, the indicating piece does not contact the moving contact, and the indicating piece can trigger the micro switch to make the micro switch send an electrical signal.

[0019] Through the above scheme, the bracket can be used for fixed installation with the middle cover and for installation of the indicating piece, and can also be used for installation of the micro switch. In this way, the bracket can have multiple functions, thereby saving the number of parts used when the on-off state feedback function is implemented. The second mounting plate and the limiting plate are located on opposite sides of the first mounting plate, and the second mounting plate is bent away from the moving contact relative to the first mounting plate, so that the three parts of the bracket do not interfere with each other when realizing their respective functions.

[0020] When the circuit breaker is in the open state, the indicating part is not in contact with the movable contact, and in this state, the indicating part triggers the micro switch, which can reduce the influence of mechanical shaking of the movable contact on the accuracy of the triggering electrical signal of the micro switch, and can reduce the requirement for positioning accuracy of the micro switch, avoid the occurrence of signal non-conversion caused by excessive pressure on the micro switch or insufficient stroke of the indicating part, and can also improve the service life and reliability of the micro switch.

[0021] In a possible design, one side of the indicating part in the rotation direction is provided with a pushing plate, and under the action of the pulling force of the elastic member, the pushing plate pushes the micro switch, so that the micro switch sends an electrical signal.

[0022] Through the above scheme, the setting of the pushing plate facilitates to increase the abutting area of the indicating part and the micro switch, thereby increasing the reliability of the pushing force transmission when the indicating part pushes the micro switch.

[0023] In a possible design, the pushing plate and the indicating part are arranged on the same side of the indicating part.

[0024] Through the above scheme, the occupation of space can be reduced.

[0025] In a second aspect, the present application provides a circuit breaker, comprising: a housing, a movable contact and the opening and closing state feedback device in the first aspect. The movable contact is located in the housing, the bracket in the opening and closing state feedback device is fixed to the housing, and the movable contact cooperates with the indicating part of the opening and closing state feedback device.

[0026] The circuit breaker provided by the present application comprises an opening and closing state feedback device, which can feed back the opening and closing state of the circuit breaker. The opening and closing state feedback device has a simple structure, and compared with the prior art, the number of parts used when realizing its function is smaller, the assembly difficulty is smaller, and the assembly efficiency is higher. Therefore, the circuit breaker containing the opening and closing state feedback device has a small overall difficulty and a high assembly efficiency.

[0027] In a possible design, the housing comprises a base and a middle cover that are covered together, the movable contact is located in the base, the middle cover is provided with a through slot, and the indicating part and the limiting plate of the bracket in the opening and closing state feedback device are limited in the through slot.

[0028] Through the above scheme, in the width direction of the through slot, the limiting plate and the groove wall of the through slot can limit the indicating part, so as to facilitate the indicating part to accurately feed back the opening and closing state of the circuit breaker.

[0029] The circuit breaker provided in the above second aspect and each possible design of the above second aspect has the beneficial effects brought by the first aspect and each possible embodiment of the first aspect, which will not be described here again. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a circuit breaker provided in an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the internal structure of a circuit breaker in the open state, provided in an embodiment of this application.

[0032] Figure 3 This is a schematic diagram of the internal structure of a circuit breaker in the closed state, provided in an embodiment of this application.

[0033] Figure 4 This is a schematic diagram of the combined structure of a circuit breaker status feedback device provided in an embodiment of this application.

[0034] Figure 5 This is a schematic diagram of the structure of a bracket provided in an embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the structure of an indicator provided in an embodiment of this application.

[0036] Figure 7 This is a schematic diagram of the structure of a middle cover provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Housing; 110. Base; 120. Middle cover; 121. Second mounting hole; 122. Positioning post; 123. Through groove;

[0039] 200. Moving contact; 210. Extension section;

[0040] 300. Opening / closing status feedback device;

[0041] 310, bracket; 311, first hanging groove; 312, first clearance hole; 313, first mounting plate; 3131, limiting part; 3132, protrusion; 3133, first mounting hole; 3134, positioning hole; 314, limiting plate; 3141, boss; 315, second mounting plate; 3151, first hole;

[0042] 320. Indicator; 321. Indicator section; 322. Second mounting slot; 323. Mating hole; 324. Push plate;

[0043] 330. Elastic components;

[0044] 400. Static contact;

[0045] 500. Micro switch. Detailed Implementation

[0046] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "including," "comprising," "having" and "with" and variations thereof herein are meant to encompass the inclusion of the recited elements but not the exclusion of others.

[0048] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another.

[0049] The term "and / or" in this text is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the existence of A, the existence of A and B, and the existence of B. In addition, the character " / " in this text generally represents an "or" relationship between the front and rear associated objects.

[0050] The orientation words appearing in the following description are the directions shown in the drawings, and do not limit the specific structure of the opening and closing state feedback device and the circuit breaker of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0051] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not used to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0052] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0053] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, the "connection" or "connection" of mechanical structure can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by spacer, for example, fixed connection by screw, bolt or other spacer; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection for connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] Figure 1 is a structural schematic diagram of a circuit breaker provided by an embodiment of the present application, Figure 2 is a schematic diagram of the internal structure of a circuit breaker provided by an embodiment of the present application when it is in the open state, Figure 3 is a schematic diagram of the internal structure of a circuit breaker provided by an embodiment of the present application when it is in the closed state, which can be an automatic reclosing circuit breaker, or can be other circuit breakers with feedback circuit breaker opening and closing state requirements, which are not limited by the present application. As Figures 1 to 3 shown, the circuit breaker comprises a housing 100, a moving contact 200 and an opening and closing state feedback device 300.

[0055] The moving contact 200 is located in the housing 100, the bracket 310 in the opening and closing state feedback device 300 is fixed to the housing 100, and the moving contact 200 cooperates with the indicating member 320 of the opening and closing state feedback device 300.

[0056] As Figures 1 to 3 shown, the housing 100 comprises a base 110 and a middle cover 120, and the base 110 and the middle cover 120 are covered with each other to form a mounting space. The circuit breaker further comprises a static contact 400, and the moving contact 200 and the static contact 400 are both located in the mounting space. The static contact 400 is fixedly installed on the base 110, and the moving contact 200 can rotate around its rotating shaft. When the moving contact 200 rotates around the rotating shaft to contact the static contact 400, the circuit breaker is in the closed state. Conversely, when the moving contact 200 rotates around the rotating shaft to separate from the static contact 400, the circuit breaker is in the open state.

[0057] Reference Figures 1 to 3 The opening and closing state feedback device 300 comprises a bracket 310 and an indicating piece 320. The bracket 310 can be fixed to the middle cover 120 by screw connection, insertion, clamping or the like. The indicating piece 320 is rotationally connected to the bracket 310.

[0058] The first end of the indicating piece 320 is located on the side of the middle cover 120 facing the base 110, or in other words, the first end of the indicating piece 320 is located in the aforementioned mounting space. Since the first end and the moving contact 200 are both located in the mounting space, the first end of the indicating piece 320 can cooperate with the moving contact 200.

[0059] Exemplarily, as shown in Figure 2 and Figure 3 , the end of the moving contact 200 close to the rotation shaft thereof is provided with an extension segment 210 facing the middle cover 120. The extension segment 210 can rotate with the moving contact 200 in the direction away from or close to the stationary contact 400. The first end of the indicating piece 320 is located on the rotation path of the extension segment 210. When the extension segment 210 rotates with the moving contact 200 in the direction close to the stationary contact 400, the extension segment 210 drives the first end of the indicating piece 320, so that the indicating piece 320 rotates relative to the bracket 310.

[0060] The second end of the indicating piece 320 is located on the side of the middle cover 120 away from the base 110. The second end of the indicating piece 320 has an opening position and a closing position. When the extension segment 210 does not drive the indicating piece 320 to rotate, the second end of the indicating piece 320 is in the opening position. When the indicating piece 320 is driven by the extension segment 210 to rotate relative to the bracket 310 to the position where the moving contact 200 contacts the stationary contact 400, the second end of the indicating piece 320 moves from the opening position to the closing position.

[0061] The circuit breaker provided by the present application comprises an opening and closing state feedback device 300, which can feedback the opening and closing state of the circuit breaker. The opening and closing state feedback device 300 has a simple structure, and compared with the prior art, the number of parts used when realizing its function is less, the assembly difficulty is smaller, and the assembly efficiency is higher. Therefore, the circuit breaker comprising the opening and closing state feedback device 300 has a small overall difficulty and a high assembly efficiency.

[0062] The opening and closing state feedback device 300 provided by the present application will be described in detail below with reference to the accompanying drawings. The opening and closing state feedback device 300 is applied to the aforementioned circuit breaker.

[0063] Figure 4 is a combined structure schematic view of an opening and closing state feedback device provided by an embodiment of the present application, as shown in Figure 4As shown, the circuit breaker status feedback device 300 includes a bracket 310, an indicator 320, and an elastic element 330.

[0064] like Figures 1 to 3 As shown, the position of the bracket 310 remains fixed. The bracket 310 can be fixed to the middle cover 120 in the manner described above. Since the position of the middle cover 120 remains fixed, the position of the bracket 310 fixed to the middle cover 120 also remains fixed.

[0065] Combination Figures 1 to 4 The indicator 320 is rotatably connected to the bracket 310. The end of the indicator 320 near the moving contact 200 is located on the rotation path of the moving contact 200. The end of the indicator 320 away from the moving contact 200 is provided with an indicator part 321, which is provided with an open indicator and an closed indicator.

[0066] The side of the indicator 320 closest to the moving contact 200 is the first end of the indicator 320, and the end of the indicator 320 furthest from the moving contact 200 is the second end of the indicator 320. Therefore, the end of the indicator 320 closest to the moving contact 200 is located on the rotation path of the moving contact 200, meaning the first end of the indicator 320 is located on the rotation path of the moving contact 200. The end of the indicator 320 furthest from the moving contact 200 is provided with an indicator portion 321, meaning the second end of the indicator 320 is provided with an indicator portion 321.

[0067] The indicator 321 can be integrally formed with the indicator 320 to save assembly steps. Alternatively, the indicator 321 can be separately formed from the indicator 320 and then assembled. The indicator 321 can be a plate-like structure connected to the indicator 320. This plate-like structure can be divided into a first plate and a second plate, with the first plate having an open indicator and the second plate having an closed indicator.

[0068] In some examples, the trip indicator can be a printed or engraved label containing the word "trip". For example, it can be printed or engraved with words such as "trip", "trip", or "trip status". Correspondingly, the closing indicator can be a printed or engraved label containing the word "closing" on the second board. For example, it can be printed or engraved with words such as "closing", "closing", or "closing status".

[0069] In other examples, the open indicator can be red paint applied to the first panel. Conversely, the closed indicator can be green paint applied to the second panel.

[0070] The above only illustrates two possible examples of open and closed circuit breakers, but does not constitute a limitation on the technical solution of this application. As long as the open and closed circuit breakers are different and can facilitate operators to distinguish the current state of the circuit breaker based on the open and closed circuit breakers, this application does not impose any limitations on this.

[0071] Generally, the circuit breaker further comprises a face cover. The face cover can be provided with a visual window.

[0072] When the indicating member 320 is positively rotated relative to the bracket 310 to close the circuit breaker under the pushing force of the movable contact 200, the second end of the indicating member 320 is in the closing position, and the closing mark is opposite the visual window. At this time, the closing state of the circuit breaker can be fed back through the closing mark. The operator can determine that the circuit breaker is currently in the closing state by seeing the closing mark from the visual window. Figure 2 and Figure 3 The positive rotation can be a clockwise rotation, for example, in the placement orientation shown in

[0073] When the second end of the indicating member 320 is in the opening position, the opening mark is opposite the visual window. At this time, the opening state of the circuit breaker can be fed back through the opening mark. The operator can determine that the circuit breaker is currently in the opening state by seeing the opening mark from the visual window.

[0074] The indicating member 320 can be rotationally connected to the bracket 310 in a hole-shaft cooperation manner. The rotationally connected part between the indicating member 320 and the bracket 310 can be located between the first end and the second end of the indicating member 320.

[0075] As shown in Figure 4 The elastic member 330 of the closing and opening state feedback device 300 has one end connected to the bracket 310 and the other end connected to the indicating member 320.

[0076] Figure 5 is a structural schematic diagram of a bracket provided by an embodiment of the present application, Figure 6 is a structural schematic diagram of an indicating member provided by an embodiment of the present application, in combination with Figures 4 to 6 In some examples, the side wall of the bracket 310 can be provided with a first hanging groove 311, and the side of the indicating member 320 facing the first hanging groove 311 is provided with a second hanging groove 322. One end of the elastic member 330 has a first hook, and the other end of the elastic member 330 has a second hook. The first hook cooperates with the first hanging groove 311, and the second hook cooperates with the second hanging groove 322, so as to realize the connection of the two ends of the elastic member 330 with the bracket 310 and the indicating member 320, respectively.

[0077] In some other examples, the bracket 310 can be provided with a first accommodating hole 312 in addition to the first hook groove 311 on the side wall of the bracket 310. The first hook can be hooked on the first hook groove 311, and the end of the first hook away from the second hook can be located in the first accommodating hole 312. In this case, the length of the first hook can be set to be relatively long to ensure the reliability of the cooperation between the first hook and the first hook groove 311. In this case, the end of the relatively long first hook can be located in the first accommodating hole 312, reducing the possibility that the end of the first hook interferes with the bracket 310 when the first hook is set to be relatively long. The first accommodating hole 312 can be a blind hole with an opening facing away from the second hook groove 322, or can be a through hole, which is not limited in the present application.

[0078] Similarly, the indicating member 320 can be provided with a second accommodating hole in addition to the second hook groove 322. The structure and function of the second accommodating hole are similar to those of the first accommodating hole 312, which will not be described in detail here.

[0079] One end of the elastic member 330 is connected to the bracket 310, and the other end is connected to the indicating member 320. The position of the bracket 310 is fixed and does not change. When the indicating member 320 does not rotate, the elastic member 330 can be in a pre-stretched state to place the second end of the indicating member 320 in a suitable position. During the closing process of the circuit breaker, the force exerted by the moving contact 200 on the indicating member 320 is much greater than the force value of the elastic member 330. The indicating member 320 is driven by the moving contact 200 to rotate in the positive direction against the force of the elastic member 330. The elastic member 330 is stretched to store energy during this process.

[0080] In combination with Figure 4 and Figure 5 , the bracket 310 is provided with a limiting portion 3131 located on the rotation path of the indicating member 320. The limiting portion 3131 can limit the rotation amplitude of the indicating member 320, and further limit the position of the indicating member 320 in the open state. The structure of the limiting portion 3131 will be described later, which will not be described here.

[0081] When the pushing force on the indicating member 320 is removed, the energy stored in the elastic member 330 is released, and the indicating member 320 is driven to rotate in the reverse direction. When the indicating member 320 rotates in the reverse direction to abut against the limiting portion 3131, the indicating member 320 is reset, and the open indication feeds back the open state of the circuit breaker. In this case, the reverse rotation is opposite to the positive rotation, which is taken as an example of the placement direction shown in Figure 2 and Figure 3 , the reverse rotation can be counterclockwise rotation.

[0082] The closing and opening state feedback device 300 provided by the embodiment of the present application, the indicating piece 320 is rotationally connected to the fixed-position support 310, the indicating piece 320 is pushed by the dynamic contact 200, and the indicating piece 320 is positively rotated relative to the support 310 to the closing state of the circuit breaker, and the closing mark on the indicating piece 320 can feedback the closing state of the circuit breaker. When the pushing force on the indicating piece 320 is removed, the indicating piece 320 is reversely rotated under the action of the elastic piece 330, and when the indicating piece 320 reversely rotates to abut against the limiting part 3131 on the support 310, the opening mark on the indicating piece 320 can feedback the opening state of the circuit breaker. In this way, through the cooperation between the indicating piece 320, the support 310 and the elastic piece 330, the closing and opening state of the circuit breaker can be fed back, so that the closing and opening state feedback device 300 has the function of feeding back the closing and opening state of the circuit breaker.

[0083] The indicating piece 320 is rotationally connected to the fixed-position support 310, so that the support 310 can fix the position of the rotation center of the indicating piece 320. In addition, the support 310 is provided with the limiting part 3131, and the limiting part 3131 is located on the rotation path of the indicating piece 320, so that the support 310 can limit the rotation amplitude of the indicating piece 320 in the reverse rotation process of the indicating piece 320, and further limit the position of the indicating piece 320 in the opening state. It can be seen that the support 310 not only plays a role of installing the indicating piece 320, but also plays a role of limiting the position of the indicating piece 320. The support 310 is a structural part with multiple functions, and has the effect of functional multiplexing of the support 310. Therefore, when the closing and opening state feedback function is implemented, the number of parts used by the present application is relatively small, and the effect of saving the number of parts used is achieved. In this way, the overall structure of the closing and opening state feedback device 300 is relatively simple, the assembly difficulty is small, and the assembly efficiency is high.

[0084] Please continue to refer to Figure 5 The support 310 includes the first mounting plate 313 and the limiting plate 314 which are connected to each other. Figures 2 to 5 The limiting plate 314 is bent towards the dynamic contact 200 relative to the first mounting plate 313, the indicating piece 320 is rotationally connected to the limiting plate 314, and the first mounting plate 313 is used to fix the support 310 to the housing 100 of the circuit breaker. In the arrangement direction of the limiting plate 314 and the indicating piece 320, part of the first mounting plate 313 has a protruding part 3132 compared with the limiting plate 314, and the limiting part 3131 is arranged on the protruding part 3132.

[0085] The limiting plate 314 is bent towards the movable contact 200 relative to the first mounting plate 313, so that the first mounting plate 313 and the limiting plate 314 have a non-zero included angle. Exemplarily, the non-zero included angle can be 85 degrees, 87 degrees, 90 degrees, 91 degrees, etc. In some cases, the first mounting plate 313 and the limiting plate 314 can be approximately perpendicular. In this case, the first mounting plate 313 can be attached to and connected to the side of the middle cover 120 away from the base 110, to achieve fixed installation of the support 310 on the middle cover 120. Also, the indicating piece 320 can be attached to and connected to the side of the limiting plate 314 away from the first mounting plate 313, to achieve rotational connection of the indicating piece 320 on the limiting plate 314.

[0086] As shown in Figure 5 and Figure 7 , the first mounting plate 313 can be provided with a first mounting hole 3133, and the middle cover 120 can be provided with a second mounting hole 121 opposite the first mounting hole 3133. A fastener such as a screw can pass through the first mounting hole 3133 and the second mounting hole 121 and be fastened to at least one of the first mounting hole 3133 and the second mounting hole 121. In this way, the support 310 can be fixedly installed on the middle cover 120. Since the position of the middle cover 120 is fixed, the position of the support 310 fixedly installed on the middle cover 120 will also be fixed. In the present application, the first mounting plate 313 and the middle cover 120 can be connected by any means such as screw connection, riveting, interference fitting, etc., which are not limited in the present application.

[0087] Exemplarily, as shown in Figure 5 and Figure 7 , the first mounting plate 313 can also be provided with at least one positioning hole 3134, and the side of the middle cover 120 away from the base 110 can be provided with at least one positioning post 122. When it is necessary to connect the first mounting plate 313 and the middle cover 120, the positioning hole 3134 can be sleeved on the corresponding positioning post 122, or the positioning post 122 can be inserted into the corresponding positioning hole 3134, to accurately position the first mounting plate 313. In this way, it is convenient to quickly align the first mounting hole 3133 and the second mounting hole 121, thereby facilitating quick fixed connection of the first mounting plate 313 on the middle cover 120.

[0088] In fact, the positioning post 122 can also be provided on the first mounting plate 313, and the positioning hole 3134 can also be provided on the middle cover 120. In this way, the position of the first mounting plate 313 can be accurately positioned according to the foregoing operation, thereby facilitating quick fixed installation of the first mounting plate 313 on the middle cover 120.

[0089] The first mounting plate 313 and the limiting plate 314 can be formed by stamping a plate. The limiting plate 314 is connected to a portion of the first mounting plate 313, and another portion of the first mounting plate 313 is not connected to the limiting plate 314. The portion of the first mounting plate 313 not connected to the limiting plate 314 protrudes from the limiting plate 314 in the arrangement direction of the limiting plate 314 and the indicating element 320. The portion of the first mounting plate 313 protruding from the limiting plate 314 is the protruding portion 3132 of the first mounting plate 313.

[0090] The side of the limiting plate 314 away from the first mounting plate 313 is used for mounting the indicating element 320 and can limit the indicating element 320. The protruding portion 3132 protrudes from the side of the limiting plate 314 away from the first mounting plate 313, so when the indicating element 320 rotates in the plane of the side of the limiting plate 314 away from the first mounting plate 313, the indicating element 320 will touch the protruding portion 3132 and be limited by the limiting portion 3131 of the protruding portion 3132 in the rotation path of the indicating element 320.

[0091] In some examples, the limiting portion 3131 can be a side of the protruding portion 3132 close to the limiting plate 314. The side can be a plane, or the side can also be an arc surface. In other examples, the limiting portion 3131 can be a limiting groove provided on the side of the protruding portion 3132 close to the limiting plate 314. The limiting groove can be a square groove, a circular groove, a trapezoidal groove, etc. The embodiments of the present application do not limit the structure of the limiting portion 3131, as long as the limiting portion 3131 can limit the rotation amplitude of the indicating element 320.

[0092] In the present embodiment, the limiting plate 314 is bent towards the movable contact 200 relative to the first mounting plate 313, so that the limiting plate 314 and the first mounting plate 313 are not coplanar. In this way, when the first mounting plate 313 is fixed to the housing 100 of the circuit breaker so that the position of the bracket 310 is relatively fixed, the indicating element 320 rotatably connected to the limiting plate 314 can rotate relative to the limiting plate 314 without being interfered by the housing 100. In addition, the protruding portion 3132 is provided so that at least the limiting portion 3131 of the first mounting plate 313 can be located in the rotation path of the indicating element 320 to limit the rotation of the indicating element 320, so that the indicating element 320 can be in an accurate position, thereby facilitating accurate feedback of the tripping state of the circuit breaker through the indicating element 320.

[0093] In the present application, when the indicating element 320 is rotatably connected to the bracket 310, in some examples, as shown in Figures 4 to 6 The limiting plate 314 can be integrally formed with a boss 3141, and the indicating element 320 can be provided with a matching hole 323. The boss 3141 cooperates with the matching hole 323 to rotatably connect the indicating element 320 to the limiting plate 314.

[0094] In some examples, the boss 3141 can be integrally formed on the indicating piece 320, and the limiting plate 314 can be provided with a matching hole 323. The boss 3141 and the matching hole 323 are matched to rotate the indicating piece 320 to the limiting plate 314.

[0095] The boss 3141 can be cylindrical, prismatic, or the like, and the matching hole 323 can be a round hole, or a U-shaped or V-shaped groove hole, or the like. The matching hole 323 can be a through hole or a blind hole, and the present application does not limit the same, as long as the boss 3141 and the matching hole 323 can be reliably matched.

[0096] One of the limiting plate 314 and the indicating piece 320 is provided with the boss 3141, and the other is provided with the matching hole 323. The boss 3141 is inserted into the matching hole 323, or the matching hole 323 is sleeved on the boss 3141 or is mounted on the boss 3141 under the action of the elastic piece 330, so that the boss 3141 and the matching hole 323 are matched. In this way, the indicating piece 320 can be rotatably connected to the limiting plate 314 and can be rotated in a forward or reverse direction relative to the limiting plate 314, so that the installation difficulty is low and the installation process is simple.

[0097] The boss 3141 is integrally formed on the limiting plate 314 or the indicating piece 320, which not only saves the assembly process of the boss 3141 and the limiting plate 314, or the boss 3141 and the indicating piece 320, reduces the assembly difficulty, and improves the overall assembly efficiency of the on-off state feedback device 300, but also does not need to additionally provide a structure for acting as a rotating shaft, thereby saving the number of parts used, further reducing the assembly difficulty, and improving the overall assembly efficiency of the on-off state feedback device 300.

[0098] In some examples, the on-off state feedback device 300 can further include a mounting shaft, and an end of the mounting shaft is mounted to the housing 100. The limiting plate 314 is provided with a first slot hole, the indicating piece 320 is provided with a second slot hole, and the mounting shaft is sleeved in the first slot hole and the second slot hole to rotatably connect the indicating piece 320 to the limiting plate 314.

[0099] The mounting shaft has the same effect as the rotating shaft, and both are used to realize the rotation of the indicating piece 320 relative to the limiting plate 314.

[0100] The mounting shaft can be cylindrical, prismatic, or the like, and the first slot hole and the second slot hole can be round holes, or U-shaped or V-shaped groove holes, or the like. The first slot hole and the second slot hole can be through holes or blind holes, and the present application does not limit the same, as long as the mounting shaft and the first slot hole and the second slot hole can be reliably matched.

[0101] In implementation, the end of the mounting shaft can be fixed to the middle cover 120, and the second slot hole is sleeved on the mounting shaft and can rotate around the mounting shaft. Of course, the end of the mounting shaft can also not be fixed to the middle cover 120, but be limited in the slot hole of the middle cover 120 and can rotate relative to the slot hole on the middle cover 120. In this way, the second slot hole can be tightly matched with the mounting shaft, and when the indicating element 320 rotates relative to the limiting plate 314, the mounting shaft rotates together with the indicating element 320. The present application does not make specific limitation on this.

[0102] By the way that the mounting shaft installed at the end of the shell 100 is penetrated through the first slot hole and the second slot hole, the indicating element 320 can be rotationally connected to the limiting plate 314 and can rotate relative to the limiting plate 314. In this way, the implementation mode of rotationally connecting the indicating element 320 to the limiting plate 314 is diversified, and the selectivity and operability are high.

[0103] It should be noted that, as shown in Figure 7 , the middle cover 120 is provided with a through slot 123. In combination with Figures 2 to 7 , the indicating element 320 and the limiting plate 314 of the support 310 in the on-off state feedback device 300 are limited in the through slot 123.

[0104] The slot width of the through slot 123 can be slightly greater than the sum of the thicknesses of the indicating element 320 and the limiting plate 314, and can be less than the sum of the thickness of the indicating element 320, the thickness of the limiting plate 314 and the height of the boss 3141. In this way, the indicating element 320 and the limiting plate 314 matched with each other can just penetrate through the through slot 123, and the indicating element 320 can just rotate relative to the limiting plate 314.

[0105] After installation, one side of the indicating element 320 in the width direction of the through slot 123 can abut against the limiting plate 314, and the other side of the indicating element 320 in the width direction of the through slot 123 can abut against the slot wall of the through slot 123. In this way, the indicating element 320 is not easy to shake or move in position in the width direction of the through slot 123, and the indicating element 320 and the support 310 are not easy to fall off from the through slot 123, so as to facilitate guaranteeing that the on-off state feedback device 300 normally plays its feedback function.

[0106] Among them, the width direction of the through slot 123 is consistent with the arrangement direction of the aforementioned limiting plate 314 and the indicating element 320.

[0107] In summary, the feedback device 300 provided by the application can limit the indicating element 320 in the rotation direction of the indicating element 320 by the limiting part 3131 on the support 310. In the width direction of the through slot 123, the limiting plate 314 and the slot wall of the through slot 123 can limit the indicating element 320. The limitation in the two directions can facilitate the indicating element 320 to accurately feedback the on-off state of the circuit breaker.

[0108] Based on the foregoing embodiments, in combination with Figures 2 to 5 The support 310 can further include a second mounting plate 315 connected with the first mounting plate 313. The second mounting plate 315 and the limiting plate 314 are located on opposite sides of the first mounting plate 313, and the second mounting plate 315 is bent away from the moving contact 200 relative to the first mounting plate 313.

[0109] The second mounting plate 315 and the first mounting plate 313 form a non-zero angle. The non-zero angle can be 88 degrees, 90 degrees, etc. The second mounting plate 315 and the first mounting plate 313 can be approximately perpendicular.

[0110] The second mounting plate 315, the first mounting plate 313 and the limiting plate 314 can be integrally formed, and the three can be formed by stamping a plate material.

[0111] The second mounting plate 315 and the limiting plate 314 can be approximately parallel. In the arrangement direction of the limiting plate 314 and the indicating element 320, the second mounting plate 315 and the limiting plate 314 can be located on different sides of the first mounting plate 313. The limiting plate 314 can be located on the side of the first mounting plate 313 close to the moving contact 200, so that the indicating element 320 rotatably connected to the limiting plate 314 can cooperate with the moving contact 200. In the thickness direction of the first mounting plate 313, the second mounting plate 315 and the limiting plate 314 are bent in different directions relative to the first mounting plate 313. The limiting plate 314 is bent towards the moving contact 200 relative to the first mounting plate 313, and the second mounting plate 315 is bent away from the moving contact 200 relative to the first mounting plate 313.

[0112] The bracket 310 further comprises a second mounting plate 315 on the basis of the first mounting plate 313 and the limiting plate 314, so that the bracket 310 can be used for fixedly mounting the middle cover 120, and can be used for mounting the indicating piece 320, and can be used for mounting the micro switch 500 on the basis. In this way, the bracket 310 can have multiple functions, which facilitates saving the number of parts used when the on-off state feedback function is realized. The second mounting plate 315 and the limiting plate 314 are located on opposite sides of the first mounting plate 313, and the second mounting plate 315 is bent away from the moving contact 200 with respect to the first mounting plate 313. In this way, the three parts of the bracket 310 will not interfere with each other when realizing their respective functions.

[0113] Based on the above, in combination with Figures 1 to 6 , the on-off state feedback device 300 can further comprise a micro switch 500, which is mounted on one side of the second mounting plate 315 facing the indicating piece 320. When the circuit breaker is in the off state, the indicating piece 320 does not contact the moving contact 200, and the indicating piece 320 can trigger the micro switch 500 to make the micro switch 500 send an electrical signal.

[0114] As Figure 5 indicated, the second mounting plate 315 can be provided with at least one first hole 3151. Correspondingly, the micro switch 500 can be provided with at least one second hole. The fastener such as a screw cooperates with the first hole 3151 and the second hole, so that the micro switch 500 can be mounted on one side of the second mounting plate 315 facing the indicating piece 320.

[0115] The micro switch 500 comprises a spring piece. One side of the second end of the indicating piece 320 in the rotating direction can be provided with a pushing plate 324. The pushing surface of the pushing plate 324 can be perpendicular to the rotating direction of the indicating piece 320, so as to increase the abutting area of the indicating piece 320 and the micro switch 500, thereby increasing the reliability of the pushing force transmission when the indicating piece 320 pushes the micro switch 500.

[0116] The micro switch 500 is mounted on one side of the second mounting plate 315 facing the indicating piece 320. When the circuit breaker is in the off state, the pushing plate 324 on the indicating piece 320 can push the spring piece under the action of the pulling force of the elastic piece 330, so that the spring piece is in a retracted state, to trigger the micro switch 500. The micro switch 500 can send an electrical signal according to the mechanical pushing trigger, so as to accurately obtain the signal of the circuit breaker off and send the electrical signal to the connected line board.

[0117] When the circuit breaker is in the open state, the indicating member 320 is not in contact with the movable contact 200. In this state, the indicating member 320 triggers the micro switch 500. Compared with the case that the indicating member 320 is in contact with the movable contact 200, the triggering of the micro switch 500 can reduce the influence of mechanical shaking of the movable contact 200 on the accuracy of the triggering signal of the micro switch 500, and can reduce the requirement for the positioning accuracy of the micro switch 500, avoid the occurrence of the situation that the signal is not converted due to excessive pressure on the micro switch 500 or insufficient stroke of the indicating member 320, and improve the service life and reliability of the micro switch 500.

[0118] In some embodiments of the present application, as shown in Figure 6 The pushing plate 324 and the indicating part 321 can be arranged on the same side of the indicating member 320. In this way, the pushing plate 324 and the indicating part 321 occupy the space on the same side of the indicating member 320, and the space occupation can be reduced.

Claims

1. A closing and opening state feedback device applied to a circuit breaker, the circuit breaker comprising a movable contact, characterized in that, The opening and closing state feedback device comprises: A support, the position of which is fixed; An indicating member, which is rotationally connected to the support, is located on the rotation path of the movable contact near one end thereof, and is provided with an indicating portion at the other end thereof away from the movable contact, the indicating portion being provided with an opening label and a closing label; An elastic member, one end of which is connected to the support, and the other end of which is connected to the indicating member; The indicating member is positively rotated relative to the support under the thrust force of the movable contact to the closing state of the circuit breaker, and the closing label feeds back the closing state of the circuit breaker; and the elastic member stores energy during the positive rotation of the indicating member; The support is provided with a limiting portion, which is located on the rotation path of the indicating member; when the thrust force of the indicating member is removed, the elastic member releases energy and drives the indicating member to reverse rotation, and when the indicating member reverses to abut against the limiting portion, the opening label feeds back the opening state of the circuit breaker.

2. The switching state feedback device according to claim 1, characterized by The support comprises a first mounting plate and a limiting plate connected to each other, the limiting plate being bent towards the movable contact relative to the first mounting plate, the indicating member being rotationally connected to the limiting plate, and the first mounting plate being used to fix the support to the housing of the circuit breaker; In the arrangement direction of the limiting plate and the indicating member, part of the first mounting plate has a protruding portion compared with the limiting plate, and the limiting portion is arranged on the protruding portion.

3. The switching state feedback device according to claim 2, characterized by The limiting portion is configured as one side of the protruding portion close to the limiting plate; or The limiting portion is configured as a limiting groove arranged on the side of the protruding portion close to the limiting plate.

4. The switching state feedback device according to claim 2, characterized by The limiting plate is integrally formed with a boss, and the indicating member is provided with a matching hole; or the indicating member is integrally formed with a boss, and the limiting plate is provided with a matching hole; The boss and the matching hole are matched to rotationally connect the indicating member to the limiting plate.

5. The switching state feedback device according to claim 2, characterized by Further comprising a mounting shaft, one end of which is mounted to the housing; The limiting plate is provided with a first slot hole, the indicating member is provided with a second slot hole, and the mounting shaft is arranged in the first slot hole and the second slot hole to rotationally connect the indicating member to the limiting plate.

6. The switching state feedback device according to any one of claims 2 to 5, characterized by The support further comprises a second mounting plate connected to the first mounting plate, the second mounting plate and the limiting plate being located on opposite sides of the first mounting plate, and the second mounting plate being bent away from the movable contact relative to the first mounting plate; The opening and closing state feedback device further comprises a micro switch, which is mounted to one side of the second mounting plate facing the indicating member; When the circuit breaker is in the opening state, the indicating member does not contact the movable contact, and the indicating member can trigger the micro switch to make the micro switch send an electric signal.

7. The switching state feedback device according to claim 6, characterized by The indicating member is provided with a thrust plate on one side in the rotation direction, and under the pulling force of the elastic member, the thrust plate thrusts the micro switch to make the micro switch send the electric signal.

8. The switching state feedback device according to claim 7, characterized by The thrust plate and the indicating portion are arranged on the same side of the indicating member.

9. A circuit breaker characterized by, The switch includes a shell, a movable contact, and the opening and closing state feedback device of any one of claims 1-8. The movable contact is located in the shell, a support in the opening and closing state feedback device is fixed to the shell, and the movable contact cooperates with an indicating element in the opening and closing state feedback device.

10. The circuit breaker of claim 9, wherein, The shell includes a base and a middle cover that are coupled together, the movable contact is located in the base, the middle cover is provided with a through slot, and an indicating element in the opening and closing state feedback device and a limiting plate of the support are limited in the through slot.

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