Overload alarm non-tripping mechanism and circuit breaker

Abstract

The embodiment of the utility model provides an overload alarm non-tripping mechanism and a circuit breaker. The overload alarm non-tripping mechanism comprises a connecting piece and an adjusting piece. The connecting piece is connected with the bimetallic strip so as to move along with the bimetallic strip. The adjusting piece is connected with the connecting piece. The adjusting piece comprises a pushing part which is opposite to the elastic piece. The adjusting piece can move along with the connecting piece so that the abutting-pushing part can abut against or be away from the elastic piece. The position adjusting structure comprises a first structure and a second structure which are matched with each other. The first structure is arranged on the connecting piece. The second structure is arranged on the adjusting piece. The second structure is used for being matched with different parts of the first structure so as to connect the connecting piece and the adjusting piece and adjust the distance between the abutting and pushing part and the elastic piece. In the embodiment of the invention, the matching part of the second structure and the first structure can be determined according to the magnitude of the current needing to be loaded by the molded case circuit breaker, so that the aim of adjusting the distance between the pushing part and the elastic sheet is achieved, and the pushing part can be conveniently and accurately abutted against the elastic sheet when the molded case circuit breaker is overloaded, and the microswitch is triggered to be switched on.

Description

Technical Field

[0001] The present application relates to the technical field of power distribution equipment, and in particular to an overload alarm non-tripping mechanism and a circuit breaker. Background Art

[0002] Molded case circuit breakers are usually used in power distribution circuits. Molded case circuit breakers have functions such as switching, overload protection and undervoltage protection. Among them, overload protection means that the molded case circuit breaker cuts off the power distribution circuit when the current it carries exceeds the rated current to protect the power distribution circuit.

[0003] In some special applications (for example, in fire protection systems), it is required that the molded case circuit breaker only alarms but does not disconnect when the current it carries exceeds the rated current, so as to ensure the operation efficiency. Based on this, the prior art sets an overload alarm non-tripping mechanism in the molded case circuit breaker, which can make the molded case circuit breaker alarm but not disconnect when the current it carries exceeds the rated current.

[0004] However, since the molded case circuit breaker needs to load currents of different values, the existing overload alarm non-tripping mechanism is difficult to accurately alarm when the molded case circuit breaker is loaded with currents of different values. Utility Model Content

[0005] In view of this, an embodiment of the present application provides an overload alarm non-tripping mechanism and a circuit breaker to achieve the purpose of enabling the molded case circuit breaker to accurately alarm when the molded case circuit breaker is loaded with different current values.

[0006] In the first aspect, an embodiment of the present application provides an overload alarm non-tripping mechanism. The overload alarm non-tripping mechanism is applied to a circuit breaker. The circuit breaker includes a bimetallic strip and a micro switch provided with a spring. The overload alarm non-tripping mechanism includes a connecting piece and an adjusting piece. The connecting piece is connected to the bimetallic strip to move with the bimetallic strip. The adjusting piece is connected to the connecting piece. The adjusting piece includes a pushing portion, which is opposite to the spring. The adjusting piece can move with the connecting piece so that the pushing portion abuts against or moves away from the spring. The adjustment structure includes a first structure and a second structure that cooperate with each other. The first structure is arranged on the connecting piece. The second structure is arranged on the adjusting piece. The second structure is used to cooperate with different parts of the first structure to connect the connecting piece and the adjusting piece, and to adjust the distance between the pushing portion and the spring.

[0007] Considering the problem of low accuracy of the overload alarm non-tripping mechanism in the prior art, the embodiment of the present application sets the overload alarm non-tripping mechanism to include a connecting member and an adjusting member, and sets a first structure on the connecting member, and sets a second structure on the adjusting member, so as to facilitate determining the matching position of the second structure and the first structure according to the magnitude of the current required to be loaded by the molded case circuit breaker, so as to achieve the purpose of adjusting the distance between the push part and the spring piece, so that the push part can accurately abut the spring piece when the molded case circuit breaker is overloaded, triggering the micro switch to turn on.

[0008] In a possible design, the first structure includes a plurality of slots arranged along the moving direction of the connecting member. The second structure includes buckles adapted to the slots. The buckles are used to cooperate with different slots to adjust the distance between the push portion and the spring.

[0009] Through the above scheme, based on the current size of the load required by the molded case circuit breaker, for example, when the distance between the pushing part and the spring sheet is large, the buckle can be embedded in the slot close to the bimetallic strip to make the pushing part close to the spring sheet; when the distance between the pushing part and the spring sheet is small, the buckle can be embedded in the slot away from the bimetallic strip to make the pushing part away from the spring sheet.

[0010] In a possible design, the slot includes a first slot surface and a second slot surface, and the first slot surface and the second slot surface are opposite to each other in the moving direction of the connecting member. The buckle includes a first buckle surface and a second buckle surface, and the first buckle surface and the second buckle surface are opposite to each other in the moving direction of the connecting member; the first buckle surface is used to abut against different first slot surfaces, and the second buckle surface is used to abut against different second slot surfaces.

[0011] Through the above scheme, after the buckle cooperates with the slot to determine the distance between the push part and the spring sheet, the first slot surface and the second slot surface can limit the buckle in the moving direction of the connecting piece to ensure that the distance between the push part and the spring sheet remains constant.

[0012] In a possible design, there is a first angle α between the first groove surface and the second groove surface. 1 There is a second angle α between the first buckle surface and the second buckle surface 2 The first angle α 1 The second angle α 2 Configured as: α 1 ≥α 2 . Among them, 0°<α 1 <180°, and 0°<α 2 <180°.

[0013] Through the above solution, after the buckle is inserted into the slot, illustratively, the first groove surface can apply force to the first buckle surface and generate a force component in the moving direction of the connecting member to prevent the buckle from moving away from the bimetallic strip, thereby preventing the push portion from moving away from the spring sheet; and the second groove surface can apply force to the second buckle surface and generate a force component in the moving direction of the connecting member to prevent the buckle from moving toward the bimetallic strip, thereby preventing the push portion from approaching the spring sheet. In addition, during the process of the buckle being inserted into the slot, the first groove surface and the second groove surface can guide the buckle so that the buckle can be quickly inserted into the slot along the first groove surface and the second groove surface.

[0014] In a possible design, the first structure includes a plurality of adjustment holes. The plurality of adjustment holes are arranged along the moving direction of the connecting member. The second structure includes a deformable rod and an adjustment column, the adjustment column is arranged on the deformable rod, and the adjustment column is adapted to the adjustment hole. The deformable rod can be deformed by force, and the adjustment column can be embedded in different adjustment holes based on the deformation of the deformable rod to adjust the distance between the push portion and the spring sheet.

[0015] Through the above scheme, based on the current size of the load required by the molded case circuit breaker, for example, when the distance between the pushing part and the spring sheet is large, the adjusting column can be embedded in the adjusting hole close to the bimetallic strip to make the pushing part close to the spring sheet; when the distance between the pushing part and the spring sheet is small, the adjusting column can be embedded in the adjusting hole away from the bimetallic strip to make the pushing part away from the spring sheet.

[0016] In a possible design, the deformable rod includes a first rod and a second rod, and the first rod and the second rod are opposite to each other in a direction perpendicular to the moving direction of the connecting member. The adjusting column includes a first column and a second column; the first column is arranged on a side of the first rod away from the second rod, and the second column is arranged on a side of the second rod away from the first rod.

[0017] Through the above scheme, in the process of the adjusting column being embedded in the adjusting hole: opposite forces can be applied to the first rod and the second rod first, so that the first rod and the second rod are bent toward each other, so that the first rod and the second rod are close to each other until the distance between them is smaller than the distance between the two opposite adjusting holes; after the first rod and the second rod are positioned relative to the two opposite adjusting holes to be embedded, the force applied to the first rod and the second rod is canceled to restore the first rod and the second rod, so that the first rod and the second rod are respectively embedded in the two opposite adjusting holes.

[0018] In a possible design, the adjusting column is arranged at the end of the deformable rod away from the adjusting member.

[0019] Since the end of the deformable rod away from the adjusting member moves more sensitively when the force is applied to the deformable rod or the force is cancelled, when the adjusting column is arranged at the end of the deformable rod away from the adjusting member, the adjusting column can be easily matched with the adjusting hole.

[0020] In a possible design, the first structure includes a mounting hole and an adjusting screw, and the adjusting screw is installed in the mounting hole. The second structure includes a threaded hole, and the threaded hole penetrates along the moving direction of the connecting member. The adjusting member is connected to different positions of the adjusting screw through the threaded hole to adjust the distance between the push portion and the spring.

[0021] Through the above scheme, based on the current size of the load required by the molded case circuit breaker, illustratively, when the distance between the push portion and the spring sheet is large, the adjusting member can be connected to the position of the adjusting screw close to the bimetallic strip through a threaded hole so that the push portion is close to the spring sheet; when the distance between the push portion and the spring sheet is small, the adjusting member can be connected to the position of the adjusting screw away from the bimetallic strip through a threaded hole so that the push portion is away from the spring sheet.

[0022] In a second aspect, an embodiment of the present application further provides a circuit breaker, which includes a bimetallic strip, a micro switch with a spring, and the overload alarm non-tripping mechanism of the first aspect.

[0023] On the basis that the aforementioned overload alarm non-tripping mechanism can adjust the distance between the pushing part and the spring piece according to the size of the current that the molded case circuit breaker needs to load, so as to facilitate the pushing part to accurately abut the spring piece, the circuit breaker in this embodiment can accurately alarm when loaded with overload currents of different sizes.

[0024] In a possible design, the circuit breaker further includes a connecting screw. The bimetallic strip includes a first connecting hole adapted to the connecting screw. The connecting piece includes a second connecting hole adapted to the connecting screw. The connecting screw is connected to the first connecting hole and the second connecting hole to connect the connecting piece to the bimetallic strip.

[0025] Through the above solution, the connecting screw can be connected to the first connecting hole of the bimetallic strip and the second connecting hole of the connecting member to achieve the connection between the connecting member and the bimetallic strip. In this way, when the bimetallic strip is deformed by heat, the connecting member can move with the deformation of the bimetallic strip, so that the push portion abuts against the spring sheet, triggering the micro switch to turn on; when the bimetallic strip is cooled and restored, the connecting member can be reset based on the recovery of the bimetallic strip, so that the push portion is away from the spring sheet, causing the micro switch to turn off.

[0026] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of an overload alarm non-tripping mechanism in some embodiments of the present application.

[0029] Figure 2 This is a schematic diagram of the first adjustment mechanism in some embodiments of the present application.

[0030] Figure 3 for Figure 2 Magnified view of the middle O area.

[0031] Figure 4 This is a schematic diagram of a second adjustment mechanism in some embodiments of the present application.

[0032] Figure 5 This is a schematic diagram of a third adjustment mechanism in some embodiments of the present application.

[0033] Figure 6 This is a schematic diagram of a circuit breaker in some embodiments of the present application.

[0034] Figure 7 This is an exploded view of the bimetallic strip, connecting screws and connecting parts in some embodiments of the present application.

[0035] Description of reference numerals:

[0036] 1-circuit breaker; 11-overload alarm non-tripping mechanism; 111-connecting piece; 112-adjusting piece; DT-pushing part; 113-positioning structure; 1131-first structure; 1132-second structure; A1-slot; C1-first slot surface; C2-second slot surface; B1-buckle; M1-first buckle surface; M2-second buckle surface; A2-adjusting hole; B21-deformation rod; B22-adjusting column; A31-mounting hole; A32-adjusting screw; B3-threaded hole; 12-bimetallic strip; 13-micro switch; 131-spring; K1-first connecting hole; K2-second connecting hole; 14-connecting screw. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by the terms "inside" and "outside" are based on the directions or positional relationships 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present application.

[0041] Furthermore, the expressions indicating directions such as the X direction and the Y direction used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0042] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0043] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap-on or snap-fit ​​connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0044] When molded case circuit breakers are used in some special occasions (for example, in fire protection systems), an overload alarm non-tripping mechanism is usually set in the molded case circuit breaker. The overload alarm non-tripping mechanism can make the molded case circuit breaker alarm but not disconnect when the current carried by the molded case circuit breaker exceeds the rated current.

[0045] Specifically, the molded case circuit breaker includes a bimetallic strip and a micro switch with a spring. The bimetallic strip can bend when heated and can also be restored when cooled. The micro switch is connected to an alarm component (for example, a buzzer, etc.), and the alarm component alarms when the micro switch is turned on. The overload alarm non-tripping mechanism includes a driving member, one end of which is connected to the bimetallic strip, and the other end of the driving member is opposite to the spring provided on the micro switch. When the bimetallic strip is bent when heated, the driving member moves with the bimetallic strip, and the other end of the driving member approaches and presses the spring to turn on the micro switch. When the bimetallic strip is cooled and restored, the driving member resets with the recovery of the bimetallic strip, and the other end of the driving member is away from the micro switch to turn off the micro switch.

[0046] In the actual application of the existing molded case circuit breaker, the inventor found that: regardless of whether the value of the current that the molded case circuit breaker needs to load changes, the distance between the other end of the driving member and the spring is constant. In this way, there may be a situation where the distance that the driving member moves with the bimetallic strip is small, and the other end of the driving member cannot abut the spring, and the distance that the driving member moves with the bimetallic strip is large, and the other end of the driving member pushes the micro switch to deviate from the original position.

[0047] Based on this, an embodiment of the present application provides an overload alarm non-tripping mechanism, which adjusts the distance between the other end of the driving member (the pushing part on the adjusting member) and the spring piece by cooperating with different parts of the second structure set on the adjusting member and the first structure set on the connecting member.

[0048] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0049] The embodiment of the present application provides an overload alarm non-tripping mechanism. The overload alarm non-tripping mechanism is applied to a circuit breaker. The circuit breaker may be the aforementioned molded case circuit breaker.

[0050] See also Figure 1 The overload alarm non-tripping mechanism 11 of the embodiment of the present application includes a connecting member 111 and an adjusting member 112. The connecting member 111 is connected to the bimetallic strip so as to move with the bimetallic strip. The adjusting member 112 is connected to the connecting member 111. The adjusting member 112 includes a push portion DT, which is opposite to the spring. The adjusting member 112 can move with the connecting member 111 so that the push portion DT abuts against or moves away from the spring. The positioning structure 113 includes a first structure 1131 and a second structure 1132 that cooperate with each other. The first structure 1131 is arranged on the connecting member 111. The second structure 1132 is arranged on the adjusting member 112. The second structure 1132 is used to cooperate with different parts of the first structure 1131 to connect the connecting member 111 and the adjusting member 112, and to adjust the distance between the push portion DT and the spring.

[0051] by Figure 1 For example, assuming that the bimetallic strip is connected to the right side of the connecting member 111, the spring of the micro switch is located on the right side of the pushing portion DT.

[0052] Then, in this embodiment, when the initial position of the bimetallic strip and the initial position of the micro switch remain unchanged, when the second structure 1132 cooperates with the side of the first structure 1131 close to the bimetallic strip, the distance between the push portion DT and the spring will decrease; when the second structure 1132 cooperates with the side of the first structure 1131 away from the bimetallic strip, the distance between the push portion DT and the spring will increase. In this way, the matching position of the second structure 1132 and the first structure 1131 can be determined according to the size of the current that the molded case circuit breaker needs to load, so as to achieve the purpose of adjusting the distance between the push portion DT and the spring. After the distance between the push portion DT and the spring is determined, the push portion DT can accurately abut the spring when the molded case circuit breaker is overloaded, triggering the micro switch to turn on.

[0053] The connecting member 111 can be configured as a substantially U-shaped structure. The side wall of the connecting member 111 away from the adjusting member 112 can be connected to the bimetallic strip. In this way, when the bimetallic strip is deformed in a direction away from the connecting member 111 due to heat, the connecting member 111 can move in a direction close to the bimetallic strip as the bimetallic strip is deformed. When the bimetallic strip is cooled and restored, the connecting member 111 can be reset as the bimetallic strip is restored.

[0054] The adjusting member 112 can be configured as a plate-like structure. The plate-like structure can be a flat plate or a Figure 1 The L-shaped plate shown is not particularly limited in the present application. The push portion DT may be a part of a plate-like structure.

[0055] The adjusting member 112 is connected to the connecting member 111 through the first structure 1131 and the second structure 1132. That is to say, after the second structure 1132 cooperates with the first structure 1131, the connection between the adjusting member 112 and the connecting member 111 is realized. After the adjusting member 112 is connected to the connecting member 111, when the connecting member 111 moves toward the direction close to the bimetallic strip, the adjusting member 112 can move with the connecting member 111 toward the direction close to the bimetallic strip, so that the push portion DT approaches and abuts against the spring sheet, triggering the micro switch to turn on. When the connecting member 111 is reset, the adjusting member 112 can be reset with the connecting member 111, so that the push portion DT is away from the spring sheet, and the micro switch is turned off.

[0056] When the first structure 1131 is disposed on the connector 111, illustratively, the first structure 1131 may be disposed at a portion of the U-shaped structure that is opposite to the opening; or, the first structure 1131 may be disposed at another side wall of the U-shaped structure that is not connected to the bimetallic strip. This embodiment of the application does not specifically limit this.

[0057] When the second structure 1132 is disposed on the adjusting member 112, illustratively, the second structure 1132 can be disposed on a portion of the flat plate where the push portion DT is not disposed; or the second structure 1132 can be disposed on a plate surface of the L-shaped plate where the push portion DT is not disposed. This embodiment of the application does not specifically limit this.

[0058] In the above embodiment, the first structure 1131 and the second structure 1132 can be set in various forms. Based on the different settings of the first structure 1131 and the second structure 1132, the first structure 1131 and the second structure 1132 have various matching modes. Furthermore, based on the different matching modes of the first structure 1131 and the second structure 1132, the connection mode of the connecting member 111 and the adjusting member 112, and the adjustment mode of the distance between the adjusting member 112 and the spring sheet are different. For ease of understanding, the following is combined with Figures 2 to 5 , an exemplary description is given.

[0059] In some embodiments, see Figure 2 The first structure 1131 includes a plurality of slots A1. The plurality of slots A1 are arranged along the moving direction of the connecting member 111. The second structure 1132 includes a buckle B1 adapted to the slots A1. The buckle B1 is used to cooperate with different slots A1 to adjust the distance between the push portion DT and the spring.

[0060] In this embodiment, based on the current size of the load required by the molded case circuit breaker, when the distance between the push part DT and the spring sheet is large, the buckle B1 can be embedded in the slot A1 close to the bimetallic strip to make the push part DT close to the spring sheet; when the distance between the push part DT and the spring sheet is small, the buckle B1 can be embedded in the slot A1 away from the bimetallic strip to make the push part DT away from the spring sheet.

[0061] Please continue to see Figure 2 The slots A1 may be arranged in two rows, and the two rows of slots A1 may be opposite to each other in a direction perpendicular to the moving direction of the connecting member 111. Correspondingly, two buckles B1 may be arranged, and the two buckles B1 may be opposite to each other in a direction perpendicular to the moving direction of the connecting member 111.

[0062] Based on the above-mentioned setting of the slot A1 and the buckle B1, the process of embedding the buckle B1 into the slot A1 may include: applying opposite forces to the two buckles B1 to bring the two buckles B1 closer together until the distance between the two buckles B1 is smaller than the distance between the two rows of slots A1; moving the two buckles B1 until the heads of the two buckles B1 are opposite to the two slots A1 to be embedded; canceling the force on the two buckles B1, and the two buckles B1 recover and embed into the corresponding two slots A1.

[0063] In addition, the multiple card slots A1 in each row can be arranged continuously or at intervals, and the embodiments of the present application do not specifically limit this. Moreover, the distance between two adjacent card slots A1 can correspond to the distance that the push portion DT moves in the direction away from or close to the spring. For example, when the multiple card slots A1 are arranged continuously, the distance between two adjacent card slots A1 is relatively small, and correspondingly, when the buckle B1 switches between two adjacent card slots A1, the distance that the push portion DT moves is relatively small. For another example, when the multiple card slots A1 are arranged at intervals, the distance between two adjacent card slots A1 is relatively large, and correspondingly, when the buckle B1 switches between two adjacent card slots A1, the distance that the push portion DT moves is relatively large.

[0064] For further information, see Figure 3 The slot A1 includes a first slot surface C1 and a second slot surface C2, and the first slot surface C1 and the second slot surface C2 are opposite to each other in the moving direction of the connecting member 111. The buckle B1 includes a first buckle surface M1 and a second buckle surface M2, and the first buckle surface M1 and the second buckle surface M2 are opposite to each other in the moving direction of the connecting member 111. The first buckle surface M1 is used to abut against different first slot surfaces C1, and the second buckle surface M2 is used to abut against different second slot surfaces C2.

[0065] by Figure 3 Assume that, in a slot A1, the first slot surface C1 is away from the bimetallic strip relative to the second slot surface C2. Also, assume that, on the buckle B1, the first buckle surface M1 is away from the bimetallic strip relative to the second buckle surface M2.

[0066] Then, in this embodiment, after the buckle B1 is inserted into any of the slots A1, in the slot A1, the first slot surface C1 can abut against the first buckle surface M1 to prevent the buckle B1 from moving in the direction away from the bimetallic strip, thereby preventing the push portion DT from moving away from the spring sheet; and the second slot surface C2 can abut against the second buckle surface M2 to prevent the buckle B1 from moving in the direction close to the bimetallic strip, thereby preventing the push portion DT from moving close to the spring sheet. In other words, after the buckle B1 cooperates with the slot A1 to determine the distance between the push portion DT and the spring sheet, the first slot surface C1 and the second slot surface C2 can limit the buckle B1 in the moving direction of the connector 111 to ensure that the distance between the push portion DT and the spring sheet remains constant.

[0067] The first groove surface C1 , the second groove surface C2 , the first buckle surface M1 and the second buckle surface M2 may all be planes.

[0068] When the first groove surface C1 and the second groove surface C2 are opposite to each other in the moving direction of the connecting member 111, specifically, in the moving direction of the connecting member 111, the projection of the first groove surface C1 and the projection of the second groove surface C2 may completely overlap or partially overlap, and the embodiment of the present application does not make any special limitation on this.

[0069] Similarly, when the first buckle surface M1 and the second buckle surface M2 are opposite to each other in the moving direction of the connecting member 111, specifically, in the moving direction of the connecting member 111, the projection of the first buckle surface M1 and the projection of the second buckle surface M2 can completely overlap or partially overlap, and the embodiment of the present application does not make any special limitation on this.

[0070] In the above embodiment, there may be various angles between the first groove surface C1 and the second groove surface C2. Also, there may be various angles between the first buckle surface M1 and the second buckle surface M2. For ease of understanding, an exemplary description is given below.

[0071] In some examples, the first groove surface C1 and the second groove surface C2 may be parallel to each other, and the first groove surface C1 and the second groove surface C2 may be perpendicular to the extension direction of the connector 111. The first buckle surface M1 and the second buckle surface M2 may be parallel to each other, and the first buckle surface M1 and the second buckle surface M2 may be perpendicular to the extension direction of the connector 111. (not shown in the figure)

[0072] In this embodiment, after the buckle B1 is embedded in the slot A1, the first groove surface C1 can apply a force to the first buckle surface M1 that is the same as the moving direction of the connecting member 111 (the force perpendicular to the first buckle surface M1) to prevent the buckle B1 from moving away from the bimetallic strip, thereby preventing the push portion DT from moving away from the spring sheet; and the second groove surface C2 can apply a force to the second buckle surface M2 that is the same as the moving direction of the connecting member 111 (the force perpendicular to the second buckle surface M2) to prevent the buckle B1 from moving toward the bimetallic strip, thereby preventing the push portion DT from approaching the spring sheet.

[0073] For other examples, see Figure 3 There is a first angle α between the first groove surface C1 and the second groove surface C2 1 There is a second angle α between the first buckle surface M1 and the second buckle surface M2 2 The first angle α 1 The second angle α 2 Configured as: α 1 ≥α 2 . Among them, 0°<α 1 <180°, and 0°<α 2 <180°.

[0074] In this embodiment, after the buckle B1 is embedded in the slot A1, the first groove surface C1 can apply force to the first buckle surface M1 and generate a component force in the moving direction of the connecting member 111 to prevent the buckle B1 from moving away from the bimetallic strip, thereby preventing the push portion DT from moving away from the spring sheet; and the second groove surface C2 can apply force to the second buckle surface M2 and generate a component force in the moving direction of the connecting member 111 to prevent the buckle B1 from moving toward the bimetallic strip, thereby preventing the push portion DT from approaching the spring sheet.

[0075] In addition, when the buckle B1 is inserted into the slot A1, the first slot surface C1 and the second slot surface C2 can guide the buckle B1 so that the buckle B1 can be quickly inserted into the slot A1 along the first slot surface C1 and the second slot surface C2.

[0076] Among them, the first angle α 1 The second angle α 2 Configured as: α 1 ≥α 2 When the card slot A1 is inserted into the card slot A1, the opening size of the card slot A1 will be greater than or equal to the size of the buckle B1, so that the buckle B1 can be completely embedded in the card slot A1.

[0077] In addition, the first angle α 1 The second angle α 2 Specifically, it can be set to 30°, 60°, 90°, 120° or 150°, etc., or it can be set to other angles, and the embodiments of the present application do not make any special limitations on this.

[0078] In other embodiments, see Figure 4The first structure 1131 includes a plurality of adjustment holes A2. The plurality of adjustment holes A2 are arranged along the moving direction of the connecting member 111. The second structure 1132 includes a deformable rod B21 and an adjustment column B22. The adjustment column B22 is disposed on the deformable rod B21, and the adjustment column B22 is adapted to the adjustment hole A2. The deformable rod B21 can be deformed by force, and the adjustment column B22 can be embedded in different adjustment holes A2 based on the deformation of the deformable rod B21 to adjust the distance between the push portion DT and the spring sheet.

[0079] In this embodiment, based on the current size of the required load of the molded case circuit breaker, when the distance between the push part DT and the spring sheet is large, the adjusting column B22 can be embedded in the adjusting hole A2 close to the bimetallic strip to make the push part DT close to the spring sheet; when the distance between the push part DT and the spring sheet is small, the adjusting column B22 can be embedded in the adjusting hole A2 away from the bimetallic strip to make the push part DT away from the spring sheet.

[0080] Please continue to see Figure 4 The adjustment holes A2 may be arranged in two rows, and the two rows of adjustment holes A2 may be opposite to each other in a direction perpendicular to the moving direction of the connecting member 111. Correspondingly, two adjustment posts B22 may be arranged, and the two adjustment posts B22 may also be opposite to each other in a direction perpendicular to the moving direction of the connecting member 111.

[0081] Based on the above-mentioned setting form of the adjustment hole A2 and the adjustment column B22, the process of embedding the adjustment column B22 into the adjustment hole A2 may include: applying force to the deformable rod B21 to make the two adjustment columns B22 approach to each other until the distance between the two adjustment columns B22 is less than the distance between the two rows of adjustment holes A2; moving the deformable rod B21 to the position where the two adjustment columns B22 are opposite to the two adjustment holes A2 that need to be embedded; canceling the force on the deformable rod B21, the deformable rod B21 is restored, and the two adjustment columns B22 are embedded into the corresponding two adjustment holes A2.

[0082] In addition, the arrangement of the plurality of adjustment holes A2 in each row can be the same as the arrangement of the aforementioned slots A1, which is not described in detail here. Moreover, the distance between two adjacent adjustment holes A2 can correspond to the distance that the push portion DT moves away from or toward the spring, which is not described in detail here.

[0083] In the above embodiment, the deformable rod B21 can be set in various forms, and the deformation modes of the deformable rod B21 are different based on the different forms of the deformable rod B21. For ease of understanding, an exemplary description is given below.

[0084] For some examples, see Figure 4The deformable rod B21 includes a first rod and a second rod, and the first rod and the second rod are opposite to each other in a direction perpendicular to the moving direction of the connecting member 111. The adjusting column B22 includes a first column and a second column; the first column is arranged on a side of the first rod away from the second rod, and the second column is arranged on a side of the second rod away from the first rod.

[0085] In this example, during the process of the adjusting column B22 being embedded in the adjusting hole A2: opposite forces can be applied to the first rod and the second rod first, so that the first rod and the second rod bend toward each other, so that the first column and the second column are close to each other until the distance between them is less than the distance between the two rows of adjusting holes A2; after the first column and the second column are positioned relative to the two adjusting holes A2 that need to be embedded, the force applied to the first column and the second rod is canceled to restore the first column and the second rod, so that the first column and the second column can be embedded in the corresponding two adjusting holes A2.

[0086] The first rod and the second rod may both be configured as prismatic rods or cylindrical rods, and this embodiment of the present application does not impose any special limitation on this.

[0087] In other examples, the deformable rod B21 is configured as a U-shaped rod, and the side of the U-shaped rod opposite to the opening is connected to the adjustment member 112. The adjustment column B22 includes a first column and a second column; one of the first column and the second column is arranged on one of the side rods in the U-shaped rod, and the other is arranged on the other side rod in the U-shaped rod, and the first column and the second column are separated from each other. (not shown in the figure)

[0088] In this example, during the process of the adjusting column B22 being embedded in the adjusting hole A2: opposite forces can be applied to the two side rods in the U-shaped rod to make the two side rods bend toward each other, so that the first column and the second column are close to each other until the distance between them is less than the distance between the two rows of adjusting holes A2; after the first column and the second column are positioned relative to the two adjusting holes A2 that need to be embedded, the force applied to the two side rods is canceled to restore the two side rods, so that the first column and the second column can be embedded in the corresponding two adjusting holes A2.

[0089] Among them, the U-shaped rod can be set as a prismatic rod or a cylindrical rod, and the embodiments of the present application do not make special limitations on this.

[0090] In the above embodiment, the position of the adjusting column B22 on the deformable rod B21 can be various. For ease of understanding, an exemplary description is given below.

[0091] For some examples, see Figure 4 The adjusting column B22 is disposed at the end of the deformable rod B21 away from the adjusting member 112 .

[0092] In this example, since the end of the deformable rod B21 away from the adjusting member 112 moves more sensitively when force is applied to the deformable rod B21 or force is released, when the adjusting column B22 is arranged at the end of the deformable rod B21 away from the adjusting member 112, it is convenient for the adjusting column B22 to cooperate with the adjusting hole A2.

[0093] In other examples, the adjustment column B22 is disposed between the end of the deformable rod B21 away from the adjustment member 112 and the end close to the adjustment member 112. (Not shown in the figure)

[0094] In this example, when force is applied to the deformable rod B21 or force is cancelled, the adjustment column B22 can also be embedded in the adjustment hole A2 as the deformable rod B21 is deformed.

[0095] In some other embodiments, see Figure 5 The first structure 1131 includes a mounting hole A31 and an adjusting screw A32, and the adjusting screw A32 is installed in the mounting hole A31. The second structure 1132 includes a threaded hole B3, and the threaded hole B3 penetrates along the moving direction of the connecting member 111. The adjusting member 112 is connected to different positions of the adjusting screw A32 through the threaded hole B3 to adjust the distance between the push portion DT and the spring.

[0096] In this embodiment, based on the current size of the load required by the molded case circuit breaker, when the distance between the push portion DT and the spring sheet is large, the adjusting member 112 can be connected to the position of the adjusting screw A32 close to the bimetallic sheet through the threaded hole B3 to make the push portion DT close to the spring sheet; when the distance between the push portion DT and the spring sheet is small, the adjusting member 112 can be connected to the position of the adjusting screw A32 away from the bimetallic sheet through the threaded hole B3 to make the push portion DT away from the spring sheet.

[0097] The mounting hole A31 may be a hole with a smooth inner wall or a threaded hole, and this application does not make any special limitation on this. For example, when the mounting hole A31 is a hole with a smooth inner wall, the connector 111 may be fixed to the adjusting screw A32 by sleeve connection. When the mounting hole A31 is a threaded hole B3, the connector 111 may be connected to the adjusting screw A32 by threads.

[0098] The present application also provides a circuit breaker 1. The circuit breaker 1 may be the aforementioned molded case circuit breaker. Figure 6 The circuit breaker 1 includes a bimetallic strip 12, a micro switch 13 with a spring 131, and the aforementioned overload alarm non-tripping mechanism 11.

[0099] On the basis that the aforementioned overload alarm non-tripping mechanism 11 can adjust the distance between the push portion DT and the spring piece 131 according to the size of the current that the molded case circuit breaker 1 needs to load, so that the push portion DT can accurately abut the spring piece 131, the circuit breaker 1 in this embodiment can accurately alarm when loaded with overload currents of different sizes.

[0100] In some embodiments, please combine Figure 6 and Figure 7 The circuit breaker 1 further includes a connecting screw 14. The bimetal 12 includes a first connecting hole K1 adapted to the connecting screw 14. The connecting member 111 includes a second connecting hole K2 adapted to the connecting screw 14. The connecting screw 14 is connected to the first connecting hole K1 and the second connecting hole K2 to connect the connecting member 111 to the bimetal 12.

[0101] In this embodiment, the connecting screw 14 can be connected to the first connecting hole K1 of the bimetal 12 and the second connecting hole K2 of the connecting member 111 to achieve the connection between the connecting member 111 and the bimetal 12. In this way, when the bimetal 12 is deformed by heat, the connecting member 111 can move with the deformation of the bimetal 12, so that the push portion DT abuts against the spring 131, triggering the micro switch 13 to turn on; when the bimetal 12 cools and recovers, the connecting member 111 can be reset based on the recovery of the bimetal 12, so that the push portion DT is away from the spring 131, so that the micro switch 13 is turned off.

[0102] In some embodiments, the circuit breaker 1 further includes a connection cover, which is sleeved outside the bimetallic strip 12, and a portion of the connection cover is fixed to the connecting member 111 to connect the connecting member 111 to the bimetallic strip 12. (Not shown in the figure)

[0103] In this embodiment, the connection cover can be connected to the bimetallic strip 12 and the connecting member 111 to achieve the connection between the connecting member 111 and the bimetallic strip 12. After the connection cover is connected to the bimetallic strip 12 and the connecting member 111, the movement process of the connecting member 111 following the bimetallic strip 12 is the same as the above embodiment, which is not repeated here.

[0104] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An overload alarm non-tripping mechanism, applied to a circuit breaker, the circuit breaker comprising a bimetallic sheet and a micro switch provided with a spring; characterized in that: The overload alarm non-tripping mechanism comprises: A connecting piece connected to the bimetallic strip to move with the bimetallic strip; an adjusting member connected to the connecting member; the adjusting member includes a pushing portion, the pushing portion is opposite to the elastic sheet; the adjusting member can move with the connecting member so that the pushing portion abuts against or moves away from the elastic sheet; The positioning structure includes a first structure and a second structure that cooperate with each other. The first structure is arranged on the connecting member, and the second structure is arranged on the adjusting member. The second structure is used to cooperate with different parts of the first structure to connect the connecting member and the adjusting member and adjust the distance between the pushing portion and the spring sheet.

2. The overload alarm non-tripping mechanism according to claim 1, characterized in that: The first structure includes a plurality of card slots, and the plurality of card slots are arranged along the moving direction of the connecting member; the second structure includes a buckle adapted to the card slot; The buckle is used to cooperate with different slots to adjust the distance between the push portion and the spring sheet.

3. The overload alarm non-tripping mechanism according to claim 2, characterized in that: The slot includes a first slot surface and a second slot surface, the first slot surface and the second slot surface are opposite to each other in the moving direction of the connecting member; the buckle includes a first buckle surface and a second buckle surface, the first buckle surface and the second buckle surface are opposite to each other in the moving direction of the connecting member; The first buckle surface is used to abut against different first groove surfaces, and the second buckle surface is used to abut against different second groove surfaces.

4. The overload alarm non-tripping mechanism according to claim 3, characterized in that: A first angle α1 is formed between the first groove surface and the second groove surface; a second angle α2 is formed between the first buckle surface and the second buckle surface; the first angle α1 and the second angle α2 are configured such that: α1≥α2; Among them, 0°<α1<180°, and 0°<α2<180°.

5. The overload alarm non-tripping mechanism according to claim 1, characterized in that: The first structure includes a plurality of adjustment holes, and the plurality of adjustment holes are arranged along the moving direction of the connecting member; the second structure includes a deformable rod and an adjustment column, and the adjustment column is arranged on the deformable rod, and the adjustment column is adapted to the adjustment hole; The deformable rod can be deformed by force, and the adjusting column can be embedded in different adjusting holes based on the deformation of the deformable rod to adjust the distance between the pushing portion and the spring sheet.

6. The overload alarm non-tripping mechanism according to claim 5, characterized in that: The deformable rod comprises a first rod and a second rod, wherein the first rod and the second rod are opposite to each other in a direction perpendicular to the moving direction of the connecting member; The adjusting column includes a first column and a second column; the first column is arranged on a side of the first rod facing away from the second rod, and the second column is arranged on a side of the second rod facing away from the first rod.

7. The overload alarm non-tripping mechanism according to claim 5 or 6, characterized in that: The adjusting column is arranged at the end of the deformable rod away from the adjusting member.

8. The overload alarm non-tripping mechanism according to claim 1, characterized in that: The first structure includes a mounting hole and an adjusting screw, and the adjusting screw is installed in the mounting hole; the second structure includes a threaded hole, and the threaded hole penetrates along the moving direction of the connecting member; The adjusting member is connected to different positions of the adjusting screw through the threaded hole to adjust the distance between the pushing portion and the elastic sheet.

9. A circuit breaker, characterized in that: The invention comprises a bimetallic strip, a micro switch with a spring and an overload alarm non-tripping mechanism as claimed in any one of claims 1 to 8.

10. The circuit breaker according to claim 9, characterized in that The circuit breaker further comprises a connecting screw; the bimetallic strip comprises a first connecting hole adapted to the connecting screw; the connecting member comprises a second connecting hole adapted to the connecting screw; The connecting screw is connected to the first connecting hole and the second connecting hole to connect the connecting member to the bimetallic strip.

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