Overload alarm non-tripping assembly and circuit breaker

Abstract

The utility model provides an overload alarm non-tripping assembly and a circuit breaker, and relates to the technical field of electrical components. The overload alarm non-tripping assembly comprises a partition plate, a connecting piece, a microswitch and a bimetallic strip, the partition plate is located between the wiring cavity and the mechanism cavity, and the microswitch is fixedly installed on the partition plate. The first end of the connecting piece is connected with the bimetallic strip, the second end of the connecting piece is close to the microswitch, and the connecting piece can move relative to the partition plate. When the circuit breaker is overloaded, the bimetallic strip is bent to drive the connecting piece to move relative to the partition plate. When the connecting piece moves relative to the partition plate, the second end of the connecting piece abuts against the microswitch, so that the microswitch is triggered to give an alarm. When the circuit breaker is overloaded, the partition plate can limit the movement amplitude of the connecting piece, so that the connecting piece limits the bending degree of the bimetallic strip, and tripping of the circuit breaker is limited. According to the overload alarm non-tripping assembly, the mounting structure of the overload alarm non-tripping assembly is simplified, and wide application of the overload alarm non-tripping assembly is facilitated.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electrical components, and specifically to an overload alarm non-tripping component and a circuit breaker. Background Art

[0002] A circuit breaker is an electrical device that can close and disconnect a circuit, and is mainly used to protect electrical appliances in a circuit. A circuit breaker includes a bimetallic strip and a tripper that are connected to each other. The bimetallic strip is usually a composite material composed of at least two metal layers with different thermal expansion coefficients. When the temperature changes, the bimetallic strip bends as a whole due to the different expansion degrees of the different metal layers.

[0003] Based on this, when a conventional circuit breaker is overloaded, the heat generated by the overload will cause the bimetallic strip to bend. When the bimetallic strip bends, a thrust is applied to the release, so that the release completes the tripping action under the thrust, so that the circuit breaker automatically cuts off the current when the current is overloaded. However, in some special workplaces, circuit breakers with overload alarm and non-tripping functions are required. The purpose is to send out an overload alarm signal in time when the line is overloaded and tripping is not allowed, so as to avoid loss of life and property.

[0004] The existing circuit breaker with overload alarm non-tripping function has a complex overload alarm non-tripping module installation structure. There is a problem that the existing overload alarm non-tripping component is not conducive to wide application due to the large number of installation parts and complex structure. Utility Model Content

[0005] The present application provides an overload alarm non-tripping component and a circuit breaker, which can simplify the installation structure of the overload alarm non-tripping component.

[0006] In the first aspect, the present application provides an overload alarm non-tripping component, which is applied to a circuit breaker. The circuit breaker includes a wiring chamber and a mechanism chamber. The overload alarm non-tripping component includes a partition, a connector, a micro switch and a bimetallic strip. The partition is located between the wiring chamber and the mechanism chamber, and the micro switch is fixedly mounted on the partition. The first end of the connector is connected to the bimetallic strip, the second end of the connector is close to the micro switch, and the connector can move relative to the partition. When the circuit breaker is overloaded, the bimetallic strip bends, driving the connector to move relative to the partition; when the connector moves relative to the partition, the second end of the connector presses against the micro switch, causing the micro switch to trigger an alarm. Among them, when the circuit breaker is overloaded, the partition can limit the movement of the connector, so that the connector limits the bending degree of the bimetallic strip, thereby limiting the tripping of the circuit breaker.

[0007] Through the above scheme, it is only necessary to add a structure to realize the installation support function on the existing partition, and the overload alarm non-tripping component can be formed by connecting and cooperating between the partition, the connector, the micro switch and the bimetallic strip. Compared with the existing overload alarm non-tripping module, the overload alarm non-tripping component of the present application has a simplified structure and requires fewer installation parts, making the overload alarm non-tripping component easy to promote and apply.

[0008] In a possible design, the partition includes a main body portion and a connecting portion that are connected to each other, the main body portion is located between the wiring cavity and the mechanism cavity to isolate the wiring cavity and the mechanism cavity, and the connecting piece and the micro switch are installed on the connecting portion.

[0009] Through the above scheme, the partition in the present application not only has the function of isolating the wiring cavity and the mechanism cavity, but also has the function of supporting the micro switch, and can also limit the movement range of the connecting part, so that the partition can achieve the effect of structural reuse, effectively reducing the number of parts used, simplifying the installation structure of the overload alarm non-tripping component, and facilitating the widespread application of the overload alarm non-tripping component.

[0010] In a possible design, the connecting part includes a first plate and a second plate, the second plate is connected to a side of the first plate away from the bimetallic strip, and the micro switch is arranged on the second plate. The first end of the connecting member is connected to the bimetallic strip, and the second end of the connecting member passes through the first plate. When the circuit breaker is overloaded, the second end of the connecting member abuts against the micro switch.

[0011] Through the above solution, the first plate and the second plate not only provide an installation space for the micro switch, but also form a protective shell for the first plate and the second plate, which shields the micro switch and thus protects the micro switch. The arrangement of the connecting piece forms a connection relationship between the bimetallic strip and the connecting piece, so that when the bimetallic strip bends, the bimetallic strip and the connecting piece move synchronously, so that the switching state of the micro switch can be controlled by the connecting piece.

[0012] In a possible design, the first plate is provided with a first slot, and the second end of the connecting member passes through the first slot. The second end of the connecting member includes a first abutting portion and a first limiting portion, and the first abutting portion abuts against the micro switch. When the circuit breaker is overloaded, the first limiting portion can abut against the slot wall of the first slot.

[0013] Through the above solution, the first groove can limit the movement range of the second end of the connector, thereby limiting the activity range of the bimetallic strip to avoid excessive bending of the bimetallic strip, thereby better realizing the function of overload alarm without tripping.

[0014] In a possible design, the first plate is provided with a second slot and a third slot, the second end of the connector includes a first protrusion and a second protrusion, the first protrusion is provided with a second abutment portion, and the second protrusion is provided with a second limit portion. The first protrusion passes through the second slot, and when the circuit breaker is overloaded, the second abutment portion abuts against the micro switch. The second protrusion passes through the third slot, and when the circuit breaker is overloaded, the second limit portion can abut against the slot wall of the third slot.

[0015] Through the above solution, the first protrusion cooperates with the second groove so that the second abutting portion abuts against the micro switch, thereby using the second abutting portion to control the switch state of the micro switch. The second protrusion cooperates with the third groove so that when the circuit breaker is overloaded, the second limit portion can abut against the groove wall of the third groove, that is, the movement range of the second limit portion is limited within the third groove.

[0016] Since the first end of the connecting member is connected to the bimetallic strip, the bending movement of the bimetallic strip is also restricted by the third slot, thereby preventing the bending movement of the bimetallic strip from causing the circuit breaker to trip.

[0017] In a possible design, the overload alarm non-tripping assembly further includes a first fastener. The first end of the connector is connected to a mounting plate, the mounting plate is provided with a first connecting hole, the end of the bimetallic strip is provided with a second connecting hole, and the first fastener passes through the first connecting hole and the second connecting hole to connect the bimetallic strip and the connector.

[0018] Through the above solution, the mounting plate can provide a mounting platform for the connector, which facilitates the connection between the connector and other components. The provision of the first connecting hole and the second connecting hole facilitates the installation and positioning of the first fastener, and can improve the installation accuracy and installation speed of the first fastener. The cooperation between the first fastener, the first connecting hole and the second connecting hole enables a good connection strength to be formed between the connector and the bimetallic strip.

[0019] In a possible design, the mounting plate is provided with a flange, and the end of the bimetallic strip abuts against the flange.

[0020] Through the above scheme, the flange setting method can make one end of the bimetallic strip be installed and positioned first, which is convenient for the subsequent alignment installation of the first connecting hole and the second connecting hole, thereby improving the installation efficiency of the overload alarm non-tripping component.

[0021] In a possible design, the overload alarm non-tripping assembly also includes a second fastener, a fixing column and a third connecting hole are provided on the second plate, the fixing column is correspondingly inserted into the micro switch, and the second fastener passes through the third connecting hole to be connected to the micro switch.

[0022] Through the above scheme, the setting form of the fixed column corresponding to the insertion of the micro switch can prevent the micro switch from shaking violently during use, improve the position stability of the micro switch, and ensure the working stability of the micro switch during use.

[0023] The third connection hole is provided to facilitate the installation and positioning of the second fastener, and can improve the installation accuracy and installation speed of the second fastener. The cooperation between the second fastener and the third connection hole enables a good connection strength to be formed between the micro switch and the second plate.

[0024] In a second aspect, the present application provides a circuit breaker, comprising a housing and the overload alarm non-tripping component of the first aspect, wherein the overload alarm non-tripping component is disposed in the housing.

[0025] Through the above solution, the housing can not only provide installation space for components including the overload alarm non-tripping component to facilitate the assembly of the circuit breaker, but also protect the components inside the circuit breaker.

[0026] In a possible design, the shell includes a base, a mounting groove is defined in the base, and the partition is inserted into the mounting groove.

[0027] Through the above solution, the installation groove can play a role in quickly positioning the partition for installation and insertion, so as to facilitate the installation and maintenance of the partition and even the overload alarm non-tripping component. The matching form of the partition and the installation groove can maintain a certain connection strength between the partition and the installation groove through a simple mechanical structure.

[0028] The beneficial effects of the overload alarm non-tripping component provided in the above-mentioned second aspect and each possible design of the above-mentioned second aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and each possible implementation method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the overall structure of a circuit breaker provided in an embodiment of the present application.

[0030] Figure 2 An exploded schematic diagram of a circuit breaker provided in an embodiment of the present application.

[0031] Figure 3 for Figure 2 A partial enlarged schematic diagram of position A in the middle.

[0032] Figure 4 A schematic diagram of the overall structure of an overload alarm non-tripping component provided in an embodiment of the present application.

[0033] Figure 5 A schematic diagram of the structure of a connector provided in an embodiment of the present application.

[0034] Figure 6 A schematic structural diagram of a partition provided in an embodiment of the present application at a first viewing angle.

[0035] Figure 7 A schematic structural diagram of a partition provided in an embodiment of the present application at a second viewing angle.

[0036] Figure 8 A schematic diagram of the structure of a bimetallic strip provided in an embodiment of the present application.

[0037] Fig. 9 An exploded schematic diagram of an overload alarm non-tripping component provided in an embodiment of the present application.

[0038] Figure identification: 1. Overload alarm non-tripping component; 11. Partition; 111. Main body; 112. Connecting part; 1121. First plate; 1122. Second plate; 1123. Fixing column; 1124. Third connecting hole; 1125. Second slot; 1126. Third slot; 12. Connecting piece; 121. First end; 122. Second end; 1221. First protrusion; 1222. Second protrusion; 123. Mounting plate; 1231. First connecting hole; 1232. Flanging; 124. Second abutting part; 125. Second limiting part; 13. Micro switch; 14. Bimetallic strip; 141. Second connecting hole; 15. First fastener; 16. Second fastener; 2. Circuit breaker; 21. Housing; 211. Base; 2111. Mounting slot; 22. Wiring cavity; 23. Mechanism cavity. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the current limiting module of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] 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.

[0045] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0046] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure can refer to a physical connection. For example, the physical connection can be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through a screw, bolt or other barrier; the physical connection can also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection can also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. The "connection" or "connection" of a circuit structure can refer to not only a physical connection, but also an electrical connection or a signal connection. For example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it can also be the internal connection of two elements; the signal connection can refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] Figure 1 A schematic diagram of the overall structure of a circuit breaker provided in an embodiment of the present application is shown in FIG. Figure 2 The exploded diagram of a circuit breaker provided in an embodiment of the present application is shown in FIG. Figure 1 and Figure 2 As shown, the present application provides a circuit breaker 2 , including a housing 21 and an overload alarm non-tripping component 1 , wherein the overload alarm non-tripping component 1 is disposed in the housing 21 .

[0048] Circuit breaker 2 refers to a switch device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breaker 2 is mainly used to connect and disconnect circuits and protect the circuits.

[0049] The circuit breaker 2 in this application mainly refers to a low-voltage circuit breaker.

[0050] The housing 21 can not only provide installation space for components such as the overload alarm non-tripping component 1 to facilitate assembly of the circuit breaker 2, but also protect the components inside the circuit breaker 2. The specific structural form of the overload alarm non-tripping component 1 will be described in detail below and will not be expanded here.

[0051] Figure 3 for Figure 2 In one possible design, see Figure 2 and Figure 3The overload alarm non-tripping component 1 includes a partition 11, and the housing 21 includes a base 211. The base 211 is provided with a mounting groove 2111, and the partition 11 is inserted into the mounting groove 2111.

[0052] The installation groove 2111 can play a role in quickly positioning the partition 11 for installation and insertion, so as to facilitate the installation and maintenance of the partition 11 and even the overload alarm non-tripping assembly 1. The matching form of the partition 11 and the installation groove 2111 can maintain a certain connection strength between the partition 11 and the installation groove 2111 through a simple mechanical structure.

[0053] Figure 4 The overall structural diagram of an overload alarm non-tripping component provided in an embodiment of the present application is as follows: Figure 5 A schematic diagram of the structure of a connector provided in an embodiment of the present application.

[0054] like Figure 2 , Figure 4 and Figure 5 As shown, the present application provides an overload alarm non-tripping assembly 1, which is applied to a circuit breaker 2. The circuit breaker 2 includes a wiring chamber 22 and a mechanism chamber 23. The overload alarm non-tripping assembly 1 includes a partition 11, a connector 12, a micro switch 13 and a bimetallic strip 14. The partition 11 is located between the wiring chamber 15 and the mechanism chamber 16, and the micro switch 13 is fixedly mounted on the partition 11. The first end 121 of the connector 12 is connected to the bimetallic strip 14, the second end 122 of the connector 12 is close to the micro switch 13, and the connector 12 can move relative to the partition 11.

[0055] The partition 11 can not only isolate the wiring chamber 22 and the mechanism chamber 23 , but also provide an installation platform and support for the overload alarm non-tripping assembly 1 .

[0056] The overload alarm non-tripping component 1 can be applied to multi-phase circuit breakers of different specifications and models as needed, such as 2P circuit breakers, 3P circuit breakers, 4P circuit breakers, etc. The overload alarm non-tripping component 1 can be set in a phase of the circuit breaker or in each phase of the circuit breaker.

[0057] Specifically, the wiring cavity 22 refers to a cavity for accommodating an incoming line terminal or an outgoing line terminal, and the mechanism cavity 23 refers to a cavity for accommodating major functional components such as a contact system, an arc extinguishing system, an operating mechanism, a release, and the like.

[0058] The bimetallic strip 14 is generally in the shape of a strip and is a composite material composed of two or more metal materials or other materials. Due to the difference in thermal expansion coefficients of different materials, the bimetallic strip 14 bends when heated. Through the design and arrangement of different material layers, the bimetallic strip 14 bends in a specific direction after heating to meet corresponding usage requirements.

[0059] The micro switch 13 is a common electronic switch that opens and closes the internal contact points by applying force from the outside to achieve the switch function. The micro switch 13 is electrically connected to an alarm device, which is used to issue a warning reminder when the circuit breaker is overloaded. The alarm device can be a warning light, a buzzer, or a combination of a warning light and a buzzer.

[0060] When the circuit breaker 2 is overloaded, the bimetal 14 bends, driving the connector 12 to move relative to the partition 11. When the connector 12 moves relative to the partition 11, the second end 122 of the connector 12 presses the micro switch 13, causing the micro switch 13 to trigger an alarm. When the circuit breaker 2 is overloaded, the partition 11 can limit the movement of the connector 12, so that the connector 12 limits the bending degree of the bimetal 14, thereby limiting the tripping of the circuit breaker 2.

[0061] In existing circuit breakers, bimetallic strips are usually used in conjunction with overcurrent release devices in the circuit breakers. Specifically, the bimetallic strips are connected to the overcurrent release devices. When the circuit breaker is overloaded, the overload current heats the bimetallic strips, which deform due to the heat and generate thrust on the release device, causing the overcurrent release device to trip, thereby achieving the purpose of overcurrent protection.

[0062] In the present application, the first end 121 of the connecting member 12 is connected to the bimetallic strip 14. When the circuit breaker 2 is overloaded, the partition 11 is used to limit the movement of the connecting member 12, so as to limit the bending degree of the bimetallic strip 14 through the connecting member 12, thereby limiting the thrust generated by the bimetallic strip 14 on the release, so that the process of the release completing the tripping action is restricted, thereby limiting the tripping of the circuit breaker 2.

[0063] The shape of the connector 12 can be rod-shaped, strip-shaped, etc. When the material of the partition 11 is insulating plastic or other insulating material, the material of the connector 12 can be metal material, such as alloy, cast iron, etc., or non-metal material, such as plastic, nylon, etc.

[0064] When the circuit breaker 2 is in normal operation, that is, the circuit breaker 2 is not in an overload state, the bimetallic strip 14 is not bent, the second end 122 of the connector 12 is not in contact with the micro switch 13, and the electrical circuit inside the micro switch 13 is in a disconnected state, so that the micro switch 13 and the alarm device are in a disconnected state.

[0065] When the circuit breaker 2 is in an overload state, the bimetallic strip 14 is heated and bent under the action of the overload current, and the connecting piece 12 moves with the bimetallic strip 14, so that the second end 122 of the connecting piece 12 is close to the micro switch 13 until the second end 122 abuts against the micro switch 13, so that the electrical circuit inside the micro switch 13 is connected, and the micro switch 13 is in a connected state with the alarm device, triggering the alarm.

[0066] In the embodiment of the present application, the partition 11 is partially located between the wiring chamber 22 and the mechanism chamber 23, so that the partition 11 can isolate the wiring chamber 22 and the mechanism chamber 23. More importantly, the micro switch 13 is fixedly mounted on the partition 11, so that the inherent partition 11 can also support the installation of the micro switch 13. Compared with the prior art, there is no need to set up other additional structural parts to support the micro switch 13, which has the effect of saving the number of parts used. In addition, the partition 11 can limit the movement range of the connecting member 12, so that the connecting member 12 limits the bending degree of the bimetallic strip 14, thereby realizing the overload alarm non-tripping function of the circuit breaker 2.

[0067] In summary, the partition 11 in the present application not only has the function of isolating the wiring cavity and the mechanism cavity, but also has the function of supporting the micro switch 13, and can also limit the movement range of the connecting part 12, so that the partition 11 can achieve the effect of structural reuse, effectively reduce the number of parts used, simplify the installation structure of the overload alarm non-tripping component 1, and facilitate the wide application of the overload alarm non-tripping component 1.

[0068] Figure 6 A schematic diagram of the structure of a partition provided in an embodiment of the present application at a first viewing angle, Figure 7 A schematic structural diagram of a partition provided in an embodiment of the present application at a second viewing angle.

[0069] like Figure 4 , Figure 6 and Figure 7 As shown, in a possible design, the partition 11 includes a main body portion 111 and a connecting portion 112 that are connected to each other, the main body portion 111 is located between the wiring chamber 22 and the mechanism chamber 23 to isolate the wiring chamber 22 and the mechanism chamber 23, and the connector 12 and the micro switch 13 are installed on the connecting portion 112.

[0070] In an optional embodiment, the connection portion 112 is located at one end of the main body portion 111 , the connection portion 112 is formed by extending the main body portion 111 , and the connection portion 112 and the main body portion 111 are integrally formed.

[0071] The connection part 112 provides a mounting support platform for other components of the overload alarm non-tripping assembly 1. The main body 111 retains the original isolation function of the partition 11, so that the partition 11 adds an installation support function on the basis of the original isolation function, so that the partition 11 has multiple functions through simple structural improvements. In addition, the connection part 112 facilitates the connection and coordination between other components in the overload alarm non-tripping assembly 1 and the partition 11, which is beneficial to improving the installation efficiency of the overload alarm non-tripping assembly 1.

[0072] See also Figure 4 and Figure 7In a possible design, the connecting portion 112 includes a first plate 1121 and a second plate 1122, the second plate 1122 is connected to a side of the first plate 1121 away from the bimetal 14, and the micro switch 13 is disposed on the second plate 1122. The first end 121 of the connecting member 12 is connected to the bimetal 14, and the second end 122 of the connecting member 12 passes through the first plate 1121. When the circuit breaker 2 is overloaded, the second end 122 of the connecting member 12 abuts against the micro switch 13.

[0073] The first plate 1121 and the second plate 1122 can be fixedly connected by integral molding, gluing or other connection methods, or can be detachably connected by bolt connection, snap-fit ​​connection or other connection methods.

[0074] The micro switch 13 can be detachably mounted on the second plate 1122 by means of bolt connection or the like, or can be fixedly mounted on the second plate 1122 by means of welding, gluing or the like.

[0075] The first end 121 of the connector 12 and the bimetallic strip 14 may be connected by a detachable connection process such as bolt connection or riveting, or may be connected by a fixed connection process such as welding or adhesive bonding. When the first end 121 of the connector 12 and the bimetallic strip 14 are connected by a detachable connection method, the installation and replacement of the connector 12 and the bimetallic strip 14 are facilitated, and the after-sales maintenance efficiency of the overload alarm non-tripping assembly 1 is improved.

[0076] The micro switch 13 is arranged on the second plate 1122, and the second plate 1122 is connected to the side of the first plate 1121 away from the bimetallic strip 14, so that the micro switch 13 is located in the cavity jointly formed by the first plate 1121 and the second plate 1122, so that the first plate 1121 and the second plate 1122 jointly form a protective shell of the micro switch 13, which has a shielding effect on the micro switch 13, thereby protecting the micro switch 13.

[0077] The first end 121 of the connecting member 12 is connected to the bimetallic strip 14, and the second end 122 of the connecting member 12 passes through the first plate 1121, so that when the bimetallic strip 14 bends, the bimetallic strip 14 moves synchronously with the connecting member 12, so that the switching state of the micro switch 13 can be controlled by the connecting member 12.

[0078] In a possible design, the first plate 1121 is provided with a first slot (not shown in the figure), and the second end 122 of the connecting member 12 passes through the first slot. The second end 122 of the connecting member 12 includes a first abutting portion (not shown in the figure) and a first limiting portion (not shown in the figure). When the circuit breaker 2 is overloaded, the first abutting portion abuts against the micro switch 13. When the circuit breaker 2 is overloaded, the first limiting portion can abut against the slot wall of the first slot.

[0079] Specifically, the first slot is a through slot, and when the circuit breaker 2 operates normally, the first abutting portion passes through the first slot but does not abut against the micro switch 13. When the circuit breaker 2 is overloaded, the first abutting portion passes through the first slot and can abut against the micro switch 13, so that the switching state of the micro switch 13 is controlled by the first abutting portion. The first slot can also limit the movement range of the second end 122 of the connector 12, thereby limiting the range of movement of the bimetallic strip 14 to avoid excessive bending of the bimetallic strip 14, thereby better realizing the function of not tripping the overload alarm.

[0080] like Figure 4 and Figure 6 As shown, in a possible design, the first plate 1121 is provided with a second groove 1125 and a third groove 1126, and the second end 122 of the connector 12 includes a first protruding portion 1221 and a second protruding portion 1222, the first protruding portion 1221 is provided with a second abutting portion 12211, and the second protruding portion 1222 is provided with a second limiting portion 12221. The first protruding portion 1221 passes through the second groove 1125, and when the circuit breaker 2 is overloaded, the second abutting portion 12211 abuts against the micro switch 13. The second protruding portion 1222 passes through the third groove 1126, and when the circuit breaker 2 is overloaded, the second limiting portion 12221 can abut against the groove wall of the third groove 1126.

[0081] Specifically, the second slot 1125 and the third slot 1126 are both through slots, and the first protrusion 1221 cooperates with the second slot 1125. When the circuit breaker 2 operates normally, the second abutting portion 12211 passes through the second slot 1125, but the second abutting portion 12211 does not abut against the micro switch 13. When the circuit breaker 2 is overloaded, the second abutting portion 12211 passes through the second slot 1125, and the second abutting portion 12211 abuts against the micro switch 13, so that the second abutting portion 12211 is used to control the switch state of the micro switch 13.

[0082] The second protrusion 1222 cooperates with the third slot 1126 so that when the circuit breaker 2 is overloaded, the second limiting portion 12221 can abut against the slot wall of the third slot 1126 , that is, the movement range of the second limiting portion 12221 is limited within the third slot 1126 .

[0083] Since the first end 121 of the connecting member 12 is connected to the bimetallic strip 14, the bending movement of the bimetallic strip 14 is also restricted by the third groove 1126, thereby limiting the thrust of the bimetallic strip 14 on the releaser, so that the process of the releaser completing the tripping action is restricted, thereby limiting the tripping of the circuit breaker 2.

[0084] Figure 8 A schematic diagram of the structure of a bimetallic strip provided in an embodiment of the present application is shown in FIG. Fig. 9 An exploded schematic diagram of an overload alarm non-tripping component provided in an embodiment of the present application.

[0085] See also Figure 4 , Figure 5 , Figure 8 and Fig. 9 In a possible design, the overload alarm non-tripping assembly 1 further includes a first fastener 15. The first end 121 of the connector 12 is connected to a mounting plate 123, the mounting plate 123 is provided with a first connecting hole 1231, the end of the bimetallic strip 14 is provided with a second connecting hole 141, and the first fastener 15 passes through the first connecting hole 1231 and the second connecting hole 141 to connect the bimetallic strip 14 and the connector 12.

[0086] The mounting plate 123 can provide a mounting platform for the connector 12, so as to facilitate the connection between the connector 12 and other parts. The first connection hole 1231 and the second connection hole 141 are provided to facilitate the installation and positioning of the first fastener 15, and can improve the installation accuracy and installation speed of the first fastener 15. The cooperation between the first fastener 15, the first connection hole 1231 and the second connection hole 141 enables a good connection strength to be formed between the connector 12 and the bimetallic strip 14.

[0087] The shape of the mounting plate 123 may be a regular shape such as a parallelogram, a triangle, a regular polygon, etc. In the embodiment of the present application, the shape of the mounting plate 123 may be a rectangle.

[0088] The first fastener 15 may be a bolt, a screw, or the like.

[0089] The shapes of the first connection hole 1231 and the second connection hole 141 can be regular shapes such as a circle, a square, or a cross.

[0090] In an optional embodiment, the first fastener 15 may be a bolt, and a good connection strength is formed between the bimetallic strip 14 and the connecting member 12 through the tight fit between the bolt and the nut.

[0091] In an optional embodiment, the first fastener 15 may be a screw, and the first connecting hole 1231 and the second connecting hole 141 may be threaded holes. Through the cooperation of the first connecting hole 1231, the second connecting hole 141 and the first fastener 15, good connection strength and connection relationship can be formed between the bimetallic strip 14 and the connecting strip.

[0092] In a possible design, the mounting plate 123 is provided with a flange 1232 , and the end of the bimetallic strip 14 abuts against the flange 1232 .

[0093] The flange 1232 is arranged so that one end of the bimetallic strip 14 can be installed and positioned first, which is convenient for the subsequent alignment installation of the first connecting hole 1231 and the second connecting hole 141, thereby improving the installation efficiency and installation accuracy of the overload alarm non-tripping component 1.

[0094] Specifically, the flange 1232 can at least completely cover the end surface of the bimetallic strip 14, so that the end of the bimetallic strip 14 can fully abut against the flange 1232, so that the bimetallic strip 14 can be installed and positioned between the bimetallic strip 14 and the mounting plate 123 through the flange 1232, thereby improving the installation efficiency of the overload alarm non-tripping component 1.

[0095] like Figure 6 , Figure 7 and Fig. 9 As shown, in a possible design, the overload alarm non-tripping assembly 1 also includes a second fastener 16, and a fixing column 1123 and a third connecting hole 1124 are provided on the second plate 1122. The fixing column 1123 is inserted into the micro switch 13 accordingly, and the second fastener 16 passes through the third connecting hole 1124 to be connected to the micro switch 13.

[0096] The arrangement of the fixing column 1123 corresponding to the insertion of the micro switch 13 can prevent the micro switch 13 from shaking violently during use, improve the position stability of the micro switch 13, and ensure the working stability of the micro switch 13 during use.

[0097] The third connection hole 1124 facilitates the installation and positioning of the second fastener 16, and can improve the installation accuracy and installation speed of the second fastener 16. The cooperation between the second fastener 16 and the third connection hole 1124 enables a good connection strength to be formed between the micro switch 13 and the second plate 1122.

[0098] The second fastener 16 may be a bolt, a screw, or a screw.

[0099] The shape of the third connection hole 1124 can be a regular shape such as a circle, a square, or a cross.

[0100] The second fastener 16 and the third connection hole 1124 cooperate to form a good connection strength between the micro switch 13 and the second plate 1122. The fixing column 1123 improves the position stability of the micro switch 13, so that the micro switch 13 maintains good working stability during use.

Claims

1. An overload alarm non-tripping component, applied to a circuit breaker, the circuit breaker comprising a wiring chamber and a mechanism chamber, characterized in that: The overload alarm non-tripping assembly includes a partition, a connector, a micro switch and a bimetallic strip, wherein the partition is located between the wiring cavity and the mechanism cavity, and the micro switch is fixedly mounted on the partition; The first end of the connecting member is connected to the bimetallic strip, the second end of the connecting member is close to the micro switch, and the connecting member can move relative to the partition; When the circuit breaker is overloaded, the bimetallic strip bends, driving the connecting member to move relative to the partition; when the connecting member moves relative to the partition, the second end of the connecting member presses against the micro switch, causing the micro switch to trigger an alarm; Wherein, when the circuit breaker is overloaded, the partition can limit the movement range of the connecting member, so that the connecting member limits the bending degree of the bimetallic strip, thereby limiting the tripping of the circuit breaker.

2. The overload alarm non-tripping component according to claim 1, characterized in that: The partition comprises a main body part and a connecting part which are connected to each other, wherein the main body part is located between the wiring cavity and the mechanism cavity to isolate the wiring cavity and the mechanism cavity, and the connecting piece and the micro switch are installed on the connecting part.

3. The overload alarm non-tripping component according to claim 2, characterized in that: The connecting portion includes a first plate and a second plate, the second plate is connected to a side of the first plate away from the bimetallic strip, and the micro switch is arranged on the second plate; The first end of the connecting member is connected to the bimetallic strip, and the second end of the connecting member passes through the first plate. When the circuit breaker is overloaded, the second end of the connecting member abuts against the micro switch.

4. The overload alarm non-tripping component according to claim 3, characterized in that: The first plate is provided with a first slot, and the second end of the connecting member passes through the first slot; The second end of the connecting member includes a first abutting portion and a first limiting portion, and the first abutting portion abuts against the micro switch; When the circuit breaker is overloaded, the first limiting portion can abut against the slot wall of the first slot.

5. The overload alarm non-tripping component according to claim 3, characterized in that: The first plate is provided with a second groove and a third groove, the second end of the connecting member includes a first protruding portion and a second protruding portion, the first protruding portion is provided with a second abutting portion, and the second protruding portion is provided with a second limiting portion; The first protrusion passes through the second slot, and when the circuit breaker is overloaded, the second abutment portion abuts against the micro switch; The second protrusion passes through the third slot, and when the circuit breaker is overloaded, the second limiting portion can abut against the slot wall of the third slot.

6. The overload alarm non-tripping component according to claim 4 or 5, characterized in that: The overload alarm non-tripping assembly also includes a first fastener; The first end of the connecting member is connected to a mounting plate, the mounting plate is provided with a first connecting hole, the end of the bimetallic strip is provided with a second connecting hole, and the first fastener passes through the first connecting hole and the second connecting hole to connect the bimetallic strip and the connecting member.

7. The overload alarm non-tripping assembly according to claim 6, characterized in that: The mounting plate is provided with a flange, and the end of the bimetallic strip abuts against the flange.

8. The overload alarm non-tripping component according to claim 4 or 5, characterized in that: The overload alarm non-tripping component also includes a second fastener, a fixing column and a third connecting hole are provided on the second plate, the fixing column is correspondingly inserted into the micro switch, and the second fastener passes through the third connecting hole to be connected to the micro switch.

9. A circuit breaker, characterized in that: It comprises a housing and an overload alarm non-tripping component as claimed in any one of claims 1 to 8, wherein the overload alarm non-tripping component is arranged in the housing.

10. The circuit breaker according to claim 9, characterized in that The shell comprises a base, a mounting groove is provided in the base, and the partition is inserted into the mounting groove.

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