Circuit breaker

Abstract

The utility model provides a circuit breaker, and relates to the technical field of low-voltage electric appliances. The circuit breaker comprises a residual current transformer, a first thermal protection assembly and a first conductive piece. Wherein the residual current transformer is provided with a through hole. The first thermal protection assembly is provided with a mounting groove, and the first thermal protection assembly is arranged on one side of the residual current transformer. The first conductive piece comprises a first connecting part and a first wiring part which are connected, part of the first connecting part penetrates through the through hole, the end, away from the first wiring part, of the first connecting part extends into the mounting groove to be connected with the first thermal protection assembly, and the first wiring part is connected with an external wire. According to the circuit breaker provided by the embodiment of the invention, the assembly efficiency of the conductive part and the residual current transformer can be improved, and the assembly efficiency of the circuit breaker is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Art

[0002] A circuit breaker is an electrical component that can protect a circuit. A circuit breaker generally includes a thermal element, a conductive element, and a residual current transformer. One end of the conductive element is connected to the thermal element, and the other end of the conductive element is connected to the power supply line, and the conductive element needs to be inserted into the residual current transformer.

[0003] As circuit breakers become smaller, their internal structures become more compact. Based on the existing configuration of conductive parts and thermal elements, it is difficult to assemble conductive parts and residual current transformers, which affects the assembly efficiency of circuit breakers. Utility Model Content

[0004] The present application provides a circuit breaker to improve the assembly efficiency of a conductive member and a residual current transformer, thereby improving the assembly efficiency of the circuit breaker.

[0005] In a first aspect, the present application provides an example of a circuit breaker, which includes a residual current transformer, a first thermal protection component and a first conductive member. The residual current transformer is provided with a through hole. The first thermal protection component is provided with a mounting groove, and the first thermal protection component is arranged on one side of the residual current transformer. The first conductive member includes a first connecting portion and a first wiring portion connected to each other, a portion of the first connecting portion is passed through the through hole, an end of the first connecting portion away from the first wiring portion extends into the mounting groove and is connected to the first thermal protection component, and the first wiring portion is connected to an external wire.

[0006] Based on the above, the example of the present application sets a mounting groove in the first thermal protection component, and the first conductive member is connected to the groove wall of the mounting groove. Compared with the prior art, the conductive member is directly connected to the side of the thermal protection component facing the residual current transformer. When the size of the circuit breaker housing is consistent, the distance between the connection position of the first conductive member and the first thermal protection component and the residual current transformer in the circuit breaker provided by the example of the present application is the first distance, and the distance between the connection position of the conductive member and the thermal protection component and the residual current transformer in the prior art is the second distance. The first distance is greater than the second distance, which can facilitate the installation of the residual current transformer and the first conductive member, improve the assembly efficiency of the residual current transformer and the first conductive member, and thus improve the assembly efficiency of the circuit breaker.

[0007] In addition, when the first distance is equal to the second distance, in the example of the present application, the distance between the connection position of the first conductive member and the first thermal protection component and the contact mechanism is the third distance, and in the prior art, the distance between the connection position of the conductive member and the thermal protection component and the contact mechanism is the fourth distance. Since part of the first conductive member is installed in the installation groove of the first thermal protection component in the example of the present application, the third distance is smaller than the fourth distance. Based on this, the various structures in the circuit breaker can be made more compact, which is conducive to the miniaturization of the circuit breaker.

[0008] In some possible implementations, the first thermal protection assembly includes a first bimetallic strip and a first thermal element that are connected to each other, and the first thermal element is disposed on a side of the first bimetallic strip that faces the residual current transformer.

[0009] The mounting groove is arranged between the first bimetallic strip and the first thermal element, and one end of the first connecting portion away from the first wiring portion extends into the mounting groove and is connected to the groove wall of the mounting groove.

[0010] A mounting groove may be provided between the first bimetallic strip and the first thermal element, and an end of the first connecting portion away from the first wiring portion may extend into the mounting groove and be connected to the groove wall of the mounting groove. In the prior art, the conductive member is provided on the side of the thermal element facing the residual current transformer. In the case where the size of the circuit breaker housing is consistent, in the circuit breaker provided by the example of the present application, the length of the connection between the first connecting portion and the groove wall of the mounting groove and the first wiring portion is greater than the length of the connection between the conductive member and the thermal element in the prior art and the wiring portion, which provides a larger installation space for the residual current transformer, facilitates the installation of the residual current transformer and the first conductive member, improves the assembly efficiency of the residual current transformer and the first conductive member, and further improves the assembly efficiency of the circuit breaker.

[0011] In addition, when the length of the first conductive member in the example of the present application is consistent with that of the conductive member in the prior art, since the first conductive member in the example of the present application is connected to the first thermal protection component through the groove wall of the mounting groove, the arrangement of the first conductive member and the first thermal protection component in the base is more compact, which is conducive to the miniaturization development of the circuit breaker.

[0012] In some possible implementations, the first thermal element includes a first fixing portion and a second connecting portion, the first fixing portion is connected to the base of the circuit breaker, and at least a portion of the second connecting portion forms a mounting groove in a direction toward the residual current transformer.

[0013] In the circuit breaker provided in the example of the present application, at least part of the second connection portion is bent in the direction toward the residual current transformer to form a mounting groove, and the end of the first connection portion extends into the mounting groove and is connected to the groove wall of the first mounting groove. In the prior art, the conductive member is arranged on the side of the thermal element facing the residual current transformer. In the case where the size of the circuit breaker housing is consistent, in the circuit breaker provided in the example of the present application, the length of the connection between the first connection portion and the groove wall of the mounting groove and the first wiring portion is greater than the length of the connection between the conductive member and the thermal element in the prior art. The connection portion provides a larger installation space for the residual current transformer, further facilitates the installation of the residual current transformer and the first conductive member, and further improves the assembly efficiency of the residual current transformer and the first conductive member.

[0014] In addition, when the length of the first conductive member in the example of the present application is consistent with that of the conductive member in the prior art, since the first conductive member in the example of the present application is connected to the first thermal protection component through the groove wall of the mounting groove, the arrangement of the first conductive member and the first thermal protection component in the base is more compact, which is further conducive to the miniaturization development of the circuit breaker.

[0015] In some possible implementations, the second connecting portion includes a first connecting segment, a first bending segment, and a second connecting segment that are sequentially connected.

[0016] One end of the first connecting section away from the first bending section is connected to the first fixing portion, the first bending section is bent relative to the first connecting section along the direction toward the residual current transformer to form an installation groove, and one end of the first bending section away from the first connecting section is connected to the second connecting section.

[0017] In some possible implementations, the first connecting portion includes a third connecting segment, a second bending segment, and a fourth connecting segment that are sequentially connected.

[0018] One end of the third connecting section away from the second bending section extends into the mounting groove and is connected to the first thermal protection component, the second bending section is bent relative to the third connecting section in a direction toward the residual current transformer, and the second bending section is penetrated by the through hole, and one end of the fourth connecting section away from the second bending section is connected to the first wiring portion.

[0019] In the example of the present application, when the size of the circuit breaker housing is consistent, since the third connecting section is connected to the groove wall of the mounting groove, the distance between the third connecting section and the fourth connecting section can be made longer, that is, the length of the second bending section can be made longer, so that the assembly space reserved for the residual current transformer between the third connecting section and the fourth connecting section is larger, which facilitates the assembly of the residual current transformer and the first conductive member, and can improve the assembly efficiency of the residual current transformer and the first conductive member.

[0020] In some possible implementations, the first thermal protection component includes a first bimetallic strip, the first bimetallic strip includes a third bent section and a bent section connected to each other, and the third bent section is bent relative to the bent section in a direction away from the residual current transformer to form a mounting groove.

[0021] The mounting groove is provided on the first bimetallic strip, and the first connecting portion is connected to the groove wall of the mounting groove. In the prior art, the conductive member is provided on the side of the thermal element facing the residual current transformer. In the case where the size of the circuit breaker housing is consistent, the circuit breaker provided in the example of the present application has a length from the connection between the first connecting portion and the groove wall of the mounting groove to the first wiring portion that is greater than the length from the connection between the conductive member and the thermal element in the prior art to the wiring portion, which provides a larger installation space for the residual current transformer, facilitates the installation of the residual current transformer and the first conductive member, and further improves the assembly efficiency of the residual current transformer and the first conductive member.

[0022] In addition, when the first conductive part in the example of the present application is consistent in size with the conductive part in the prior art, since the third bending section in the example of the present application is bent relative to the bending section in a direction away from the residual current transformer to form an installation groove, the first connecting portion is connected to the first bimetallic strip through the groove wall of the installation groove, so that the arrangement of the first conductive part and the first thermal protection component in the base is more compact, which is conducive to the miniaturization development of the circuit breaker.

[0023] In some possible implementations, the circuit breaker further includes a second thermal protection assembly and a second conductive member. The second thermal protection assembly is spaced apart from the first thermal protection assembly. The second conductive member includes a third connecting portion and a second wiring portion connected to each other, an end of the third connecting portion away from the second wiring portion is connected to the second thermal protection assembly, and an end of the second wiring portion away from the third connecting portion is connected to an external wire.

[0024] By providing a second thermal protection assembly and a second conductive member connected to each other, the second conductive member has a second connection portion that can be connected to an external wire. Therefore, on the basis that the circuit breaker is connected to the external wire through the first conductive member, by providing a second conductive member that can be connected to the external wire, the circuit breaker can be connected to two live wires in the external wire at the same time, thereby expanding the scope of use of the circuit breaker.

[0025] In some possible implementations, the second thermal protection assembly includes a second thermal element, which includes a second fixed portion and a fourth connecting portion arranged at an angle, the second fixed portion is connected to the base of the circuit breaker, the fourth connecting portion is connected to the second conductive member, and a portion of the fourth connecting portion is basically parallel to the bottom wall of the base.

[0026] The second fixing part can realize fixed connection between the second thermal element and the base. By setting the second fixing part and the fourth connecting part at an angle, and part of the fourth connecting part being substantially parallel to the bottom wall of the base, the second conductive member can be easily connected to the fourth connecting part.

[0027] In some possible implementations, the circuit breaker further includes a third thermal protection assembly and a third conductive member. The third thermal protection assembly is spaced apart from the first thermal protection assembly and spaced apart from the second thermal protection assembly. The third conductive member includes a fifth connecting portion and a third wiring portion connected to each other, an end of the fifth connecting portion away from the third wiring portion is connected to the third thermal protection assembly, and an end of the third wiring portion away from the fifth connecting portion is connected to an external wire.

[0028] By providing a third thermal protection component and a third conductive member connected to each other, the third conductive member has a third wiring portion that can be connected to a neutral line in an external conductor, thereby improving the performance of the circuit breaker.

[0029] In some possible implementations, the thermal protection assembly further includes an identification structure, which is disposed on a side of the first thermal protection assembly facing the residual current transformer. And / or, the identification structure is disposed on a side of the second thermal protection assembly facing away from the bottom wall of the base. And / or, the identification structure is disposed on a side of the third thermal protection assembly facing the residual current transformer.

[0030] In the example of the present application, the circuit breaker can be marked by setting an identification structure, which is convenient for operators to assemble the circuit breaker and reduces the possibility of wrong installation or misinstallation of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a circuit breaker provided as an example of this application.

[0032] Figure 2 A schematic structural diagram of a circuit breaker from another perspective provided as an example of this application.

[0033] Figure 3 A schematic diagram of the cooperation between a first thermal protection component and a first conductive member provided as an example of the present application.

[0034] Figure 4 A schematic structural diagram of a first thermal element provided as an example of the present application.

[0035] Figure 5 A schematic structural diagram of a first conductive member provided as an example of the present application.

[0036] Figure 6 A schematic diagram of the cooperation between a second thermal element and a second conductive member provided as an example of the present application.

[0037] Figure 7 A schematic structural diagram of a third conductive member provided as an example of this application.

[0038] Description of reference numerals:

[0039] 110, first thermal protection component; 111, first bimetallic strip; 112, first thermal element; 1121, second connecting portion; 11211, first connecting section; 11212, first bending section; 11213, second connecting section; 1122, first fixing portion; 120, first conductive member; 121, first connecting portion; 1211, third connecting section; 1212, second bending section; 1213, fourth connecting section; 122, first wiring portion; 130, second conductive member; 131, third connecting portion; 132, second Wiring portion; 140, fourth conductive member; 150, third conductive member; 151, fifth connecting portion; 1511, sixth connecting section; 1512, fifth bending section; 1513, seventh connecting section; 152, third wiring portion; 160, third thermal protection assembly; 170, fourth thermal protection assembly; 180, second thermal protection assembly; 181, second thermal element; 1811, second fixing portion; 1812, fourth connecting portion; 18121, fourth bending section; 18122, fifth connecting section; 200, residual current transformer. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the examples of this application clearer, the technical solution in the examples of this application will be clearly and completely described below in conjunction with the drawings in the examples of this application. Obviously, the described examples are part of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] 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 herein are only for the purpose of describing specific examples 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.

[0042] Reference to "examples" herein means that a particular feature, structure, or characteristic described in conjunction with the examples may be included in at least one example of the present application. The appearance of the phrase "example" in various locations in the specification does not necessarily refer to the same example, nor is it an independent or alternative example that is mutually exclusive with other examples. It is explicitly and implicitly understood by those skilled in the art that the examples described herein may be combined with other examples.

[0043] 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.

[0044] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the circuit breaker of the present application.

[0045] 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.

[0046] 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).

[0047] 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 barrier, such as a fixed connection through screws, bolts or other barrier; 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.

[0048] Exemplarily, the present application provides a circuit breaker. Figure 1 A schematic diagram of the structure of a circuit breaker provided for the example of this application, Figure 2 A schematic diagram of the structure of a circuit breaker from another perspective provided as an example of this application, Figure 3 For a schematic diagram of the cooperation between the first thermal protection component and the first conductive member provided in this application example, please refer to Figure 1 to Figure 3, the circuit breaker may include a contact mechanism, a residual current transformer 200, a first thermal protection assembly 110 and a first conductive member 120. The residual current transformer 200 may be provided with a through hole. The first thermal protection assembly 110 may be provided with a mounting groove, and the first thermal protection assembly 110 is arranged on one side of the residual current transformer 200. The first conductive member 120 may include a first connecting portion 121 and a first wiring portion 122 connected to each other, a portion of the first connecting portion 121 is passed through the through hole, an end of the first connecting portion 121 away from the first wiring portion 122 extends into the mounting groove and is connected to the first thermal protection assembly 110, and the first wiring portion 122 is connected to an external wire.

[0049] The circuit breaker may be a two-phase circuit breaker, a three-phase circuit breaker, a four-phase circuit breaker or other circuit breakers, and the present application example is described by taking a four-phase circuit breaker as an example. For example, the four-phase circuit breaker may include an A phase, a B phase, a C phase and an N phase.

[0050] The residual current transformer 200 is arranged on one side of the contact mechanism, the first thermal protection component 110 is arranged between the contact structure and the residual current transformer 200, the first conductive member 120 is arranged on the side of the first thermal protection component 110 facing the residual current transformer 200, and part of the first conductive member 120 is passed through the through hole of the residual current transformer 200.

[0051] The residual current transformer 200 is usually used to detect the primary current in the power system and provide a standard secondary current signal for the secondary component meter for measurement or protection. For example, the residual current transformer 200 can be installed in a circuit breaker. At this time, the residual current transformer 200 can detect the residual current in the protected circuit. When the residual current reaches the preset action current, the residual current transformer 200 will send a current signal to other mechanisms in the circuit breaker according to the detected residual current, so that other mechanisms can put the circuit breaker in a disconnected state according to the current signal. Here, the residual current refers to the current vector sum of each phase (including the neutral line) in the protected circuit that is not zero when a leakage occurs in the protected circuit or a human body is electrocuted. The residual current may cause the circuit to heat up or even burn the circuit, causing an electrical fire accident.

[0052] The residual current transformer 200 is provided with a through hole, and part of the conductive structure in the circuit breaker can be passed through the through hole, so that the residual current transformer 200 can detect the current flowing through the circuit breaker.

[0053] The first thermal protection component 110 can be deformed when the circuit breaker is in an overloaded working state. The deformed first thermal protection component 110 can resist the operating mechanism of the circuit breaker, so that the circuit breaker is in an open state, thereby protecting the circuit where the circuit breaker is located.

[0054] Exemplarily, the first thermal protection assembly 110 , the first conductive member 120 , and other structures within the circuit breaker may cooperate to form a circuit within phase A of the circuit breaker.

[0055] The first thermal protection component 110 may only include a bimetallic strip, and the bimetallic strip may be bent to form a mounting groove, and the mounting groove may provide a mounting space for the first conductive member 120 , and the first conductive member 120 may be directly connected to the bimetallic strip.

[0056] The first thermal protection component 110 may also include a bimetallic strip and a thermal element. A mounting groove may be formed between the bimetallic strip and the thermal element, and the mounting groove may provide a mounting space for the first conductive member 120. At this time, the first conductive member 120 may be connected to the bimetallic strip, the first conductive member 120 may also be connected to the thermal element, or the first conductive member 120 may be connected to the bimetallic strip and the thermal element at the same time, and this application example does not limit this. The specific molding method of the mounting groove is described below.

[0057] The first conductive member 120 may include a first connection portion 121 and a first wiring portion 122. One end of the first connection portion 121 away from the first wiring portion 122 extends into the mounting slot and is connected to the first thermal protection assembly 110. The first wiring portion 122 is connected to an external circuit, and since the first connection portion 121 is connected to the first wiring portion 122, the circuit breaker can be connected to the external circuit. The first wiring portion 122 can be specifically connected to a live wire in the external wire.

[0058] Based on the above, the present application example sets a mounting groove on the first thermal protection component 110, and the first conductive member 120 is connected to the groove wall of the mounting groove. Compared with the prior art, the conductive member is directly connected to the side of the thermal protection component facing the residual current transformer 200. When the size of the circuit breaker housing is consistent, the distance between the connection position of the first conductive member 120 and the first thermal protection component 110 and the residual current transformer 200 in the circuit breaker provided by the present application example is the first distance, and the distance between the connection position of the conductive member and the thermal protection component and the residual current transformer 200 in the prior art is the second distance. The first distance is greater than the second distance, which can facilitate the installation of the residual current transformer 200 and the first conductive member 120, improve the assembly efficiency of the residual current transformer 200 and the first conductive member 120, and thus improve the assembly efficiency of the circuit breaker.

[0059] In addition, when the first distance is equal to the second distance, in the example of the present application, the distance between the connection position of the first conductive member 120 and the first thermal protection component 110 and the contact mechanism is the third distance, and in the prior art, the distance between the connection position of the conductive member and the thermal protection component and the contact mechanism is the fourth distance. Since part of the first conductive member 120 is installed in the installation groove of the first thermal protection component 110 in the example of the present application, the third distance is smaller than the fourth distance. Based on this, the various structures in the circuit breaker can be made more compact, which is conducive to the miniaturization of the circuit breaker.

[0060] Based on the circuit breaker provided in the above example, please refer to Figure 3 The first thermal protection assembly 110 may include a first bimetal 111 and a first thermal element 112 connected to each other, and the first thermal element 112 is disposed on a side of the first bimetal 111 facing the residual current transformer 200 .

[0061] The mounting groove is disposed between the first bimetallic strip 111 and the first thermal element 112 , and one end of the first connecting portion 121 away from the first wiring portion 122 can extend into the mounting groove and be connected to the groove wall of the mounting groove.

[0062] The first thermal element 112 may be made of copper or copper alloy. The first bimetallic strip 111 may be made of two metal materials or alloy materials with different expansion coefficients. The materials of the first bimetallic strip 111 include but are not limited to nickel, manganese, copper, iron and the like.

[0063] The first conductive member 120 and the first bimetallic strip 111 may be fixedly connected together by welding, bonding, riveting or other methods.

[0064] When the circuit breaker is in an overload working state, the first thermal element 112 can provide heat for the first bimetallic strip 111, so that the first bimetallic strip 111 is bent by the heat. The bent bimetallic strip can directly or indirectly resist the operating mechanism of the circuit breaker, causing the circuit breaker to trip and protect the circuit where the circuit breaker is located.

[0065] The mounting groove can be formed in a variety of ways. Next, examples of the forming methods of the mounting groove are given.

[0066] Exemplarily, the first thermal element may be a flat plate structure (not shown in the figure), and the first thermal element may be arranged substantially perpendicular to the bottom wall of the base of the circuit breaker. At this time, the first bimetallic strip 111 may be bent in a direction away from the residual current transformer 200, and the bent portion of the first bimetallic strip 111 may cooperate with the first thermal element to form a mounting groove, and an end of the first connecting portion 121 away from the first wiring portion 122 may extend into the mounting groove and be connected to the groove wall of the mounting groove.

[0067] Exemplarily, the first bimetallic strip 111 may be a flat plate structure, and the first bimetallic strip 111 may be arranged substantially perpendicular to the bottom wall of the base. At this time, the first thermal element 112 may be bent in a direction toward the residual current transformer 200, and a mounting groove is formed between the first thermal element 112 and the first bimetallic strip 111, and an end of the first connecting portion 121 away from the first wiring portion 122 may extend into the mounting groove and be connected to the groove wall of the mounting groove.

[0068] Exemplarily, the first bimetallic strip 111 can be bent in a direction away from the residual current transformer 200, the first thermal element 112 can be bent in a direction toward the residual current transformer 200, an installation groove can be formed between the first bimetallic strip 111 and the first thermal element 112, and an end of the first connecting portion 121 away from the first wiring portion 122 can extend into the installation groove and be connected to the groove wall of the installation groove.

[0069] In the above example, the first connection part 121 is connected to the groove wall of the installation groove, which may refer to the first connection part 121 being connected to the first bimetallic strip 111, or the first connection part 121 being connected to the first thermal element 112, or one side of the first connection part 121 being connected to the first bimetallic strip 111, and the other side of the first connection part 121 being connected to the first thermal element 112. The example of the present application does not impose any specific restriction on the connection method between the first connection part 121 and the first thermal protection component 110.

[0070] It should be noted that when the first connecting portion 121 is connected to the first bimetallic strip 111, it is necessary to ensure that the size of the first bimetallic strip 111 that can be bent and deformed is long enough. When the circuit breaker is overloaded, the first bimetallic strip 111 can be bent by heat to resist the action of the operating mechanism of the circuit breaker, so that the circuit breaker is in a tripped state.

[0071] In summary, a mounting groove may be provided between the first bimetallic strip 111 and the first thermal element 112, and one end of the first connecting portion 121 away from the first wiring portion 122 may extend into the mounting groove and be connected to the groove wall of the mounting groove. In the prior art, the conductive member is provided on the side of the thermal element facing the residual current transformer 200. In the case where the size of the circuit breaker housing is consistent, the circuit breaker provided by the example of the present application, the length of the connection between the first connecting portion 121 and the groove wall of the mounting groove and the first wiring portion 122 is greater than the length of the connection between the conductive member and the thermal element in the prior art. The residual current transformer 200 is provided with a larger installation space, which can facilitate the installation of the residual current transformer 200 and the first conductive member 120, improve the assembly efficiency of the residual current transformer 200 and the first conductive member 120, and thus improve the assembly efficiency of the circuit breaker.

[0072] In addition, when the first conductive member 120 in the example of the present application is consistent in size with the conductive member in the prior art, since the first conductive member 120 in the example of the present application is connected to the first thermal protection component 110 through the groove wall of the mounting groove, the arrangement of the first conductive member 120 and the first thermal protection component 110 in the base is more compact, which is conducive to the miniaturization of the circuit breaker.

[0073] Based on the circuit breaker provided in the above example, Figure 4 For a schematic diagram of the structure of a first thermal element provided in this application example, please refer to Figure 4 The first thermal element 112 may include a first fixing portion 1122 and a second connecting portion 1121 , the first fixing portion 1122 is connected to the base of the circuit breaker, and at least a portion of the second connecting portion 1121 forms a mounting groove in a direction toward the residual current transformer 200 .

[0074] The first fixing portion and the second connecting portion can cooperate to form a flat plate structure (not shown in the figure). In this case, the first thermal element can be substantially perpendicular to the bottom wall of the base. The bottom wall of the base can be provided with a groove, and the first fixing portion can be plugged into the groove. The first fixing portion can also be connected to the base in other ways.

[0075] The first fixing portion 1122 and the second connecting portion 1121 may also be arranged at an angle, in which case the first fixing portion 1122 may be substantially parallel to the bottom wall of the base. The first fixing portion 1122 may be connected to the base by a screw, a rivet or other connecting member. The specific implementation of the first fixing portion 1122 is not limited in this application example.

[0076] A portion of the second connection portion 1121 can be bent in a direction toward the residual current transformer 200 , and the entire second connection portion 1121 can be bent in a direction toward the residual current transformer 200 . The example of this application does not specifically limit the setting method of the second connection portion 1121 .

[0077] Exemplarily, the bent portion of the second connection portion 1121 can be arranged at the end of the second connection portion 1121 close to the first fixed portion 1122, the bent portion of the second connection portion 1121 can also be arranged at the middle position of the second connection portion 1121, or the bent portion of the second connection portion 1121 can also be arranged at the end of the second connection portion 1121 away from the first fixed portion 1122.

[0078] The end of the first connection portion 121 away from the first fixing portion 1122 may be connected to the groove wall of the installation groove, that is, the first connection portion 121 may be connected to the second connection portion 1121 .

[0079] Based on the above, in the circuit breaker provided by the example of the present application, at least part of the second connection part 1121 is bent in the direction toward the residual current transformer 200 to form a mounting groove, and the end of the first connection part 121 extends into the mounting groove and is connected to the groove wall of the first mounting groove. In the prior art, the conductive member is arranged on the side of the thermal element facing the residual current transformer 200. In the case where the size of the circuit breaker housing is consistent, in the circuit breaker provided by the example of the present application, the length of the connection between the first connection part 121 and the groove wall of the mounting groove and the first wiring part 122 is greater than the length of the connection between the conductive member and the thermal element in the prior art. The connection part provides a larger installation space for the residual current transformer 200, further facilitates the installation of the residual current transformer 200 and the first conductive member 120, and further improves the assembly efficiency of the residual current transformer 200 and the first conductive member 120.

[0080] In addition, when the first conductive member 120 in the example of the present application is consistent in size with the conductive member in the prior art, since the first conductive member 120 in the example of the present application is connected to the first thermal protection component 110 through the groove wall of the mounting groove, the arrangement of the first conductive member 120 and the first thermal protection component 110 in the base is more compact, which is further conducive to the miniaturization development of the circuit breaker.

[0081] Based on the circuit breaker provided in the above example, please refer to Figure 4 The second connecting portion 1121 includes a first connecting segment 11211, a first bending segment 11212 and a second connecting segment 11213 which are connected in sequence.

[0082] One end of the first connecting section 11211 away from the first bending section 11212 is connected to the first fixed portion 1122, the first bending section 11212 is bent relative to the first connecting section 11211 along the direction toward the residual current transformer 200 to form an installation groove, and the end of the first bending section 11212 away from the first connecting section 11211 is connected to the second connecting section 11213.

[0083] The first connecting section 11211 can be fitted with the first bimetallic strip 111 to increase the contact area between the first thermal element 112 and the first bimetallic strip 111. When the circuit breaker is in an overload working state, the heat generated by the first thermal element 112 can be transferred to the first bimetallic strip 111 in a timely and relatively complete manner, so that the first bimetallic strip 111 can be bent by the heat in a timely manner to resist the operating mechanism of the circuit breaker, thereby ensuring the reliability of the circuit breaker.

[0084] The first bending section 11212 is bent relative to the first connecting section 11211 in a direction toward the residual current transformer 200 to form a mounting groove, and a portion of the first conductive member 120 can be connected to the first bending section 11212 .

[0085] One end of the first bending section 11212 away from the first connecting section 11211 is connected to the second connecting section 11213. The second connecting section 11213 and the first bending section 11212 can cooperate to form an installation groove. At this time, part of the first conductive member 120 can be connected to both the first bending section 11212 and the second connecting section 11213. There is no specific limitation in the examples of this application.

[0086] In the examples of this application, the function of the installation groove is similar to that of the installation groove provided in the first thermal element 112 in the above examples, and the examples of this application will not be described in detail here.

[0087] Based on the circuit breaker provided in the above examples, Figure 5 For the structural schematic diagram of a first conductive member provided in the examples of this application, please refer to Figure 5 , the first connecting portion 121 includes a third connecting section 1211, a second bending section 1212, and a fourth connecting section 1213 that are connected in sequence.

[0088] One end of the third connecting section 1211 away from the second bending section 1212 extends into the installation groove and is connected to the first thermal protection component 110. The second bending section 1212 is bent relative to the third connecting section 1211 in the direction towards the residual current transformer 200, and the second bending section 1212 passes through the through hole. One end of the fourth connecting section 1213 away from the second bending section 1212 is connected to the first wiring portion 122.

[0089] The third connecting section 1211, the second bending section 1212, and the fourth connecting section 1213 can cooperate to form a "U" - shaped structure.

[0090] The fourth connecting section 1213 is connected to the first wiring portion 122. Since the first wiring portion 122 can be connected to an external wire. Therefore, the electrical connection between the circuit breaker and the external conductor can be realized.

[0091] In the examples of this application, when the size of the circuit breaker housing is the same, since the third connecting section 1211 is connected to the groove wall of the installation groove, the distance between the third connecting section 1211 and the fourth connecting section 1213 can be made longer, that is, the length of the second bending section 1212 can be made longer, so that the assembly space reserved for the residual current transformer 200 between the third connecting section 1211 and the fourth connecting section 1213 is larger, which is convenient for the assembly of the residual current transformer 200 and the first conductive member 120, and can improve the assembly efficiency of the residual current transformer 200 and the first conductive member 120.

[0092] Based on the circuit breaker provided in the above examples, please refer to Figure 1 And Figure 2 , the circuit breaker may further include a fourth thermal protection component 170 and a fourth conductive member 140.

[0093] Exemplarily, the fourth thermal protection component 170, the fourth conductive member 140, and other structures within the circuit breaker can cooperate to form a circuit within the C phase of the circuit breaker.

[0094] The fourth thermal protection component 170 is spaced apart from the first thermal protection component 110. The structure of the fourth thermal protection component 170 is similar to that of the first thermal protection component 110, and the functions are similar, so details will not be described herein.

[0095] The fourth thermal protection component 170 may include a fourth bimetal sheet and a fourth thermal element.

[0096] The structure of the fourth conductive member 140 is similar to that of the first conductive member 120. The fourth conductive member 140 may include an eighth connection section, a sixth bending section, a ninth connection section, and a fourth connection portion connected in sequence. The fourth connection portion may be connected to one of the live wires in the external wire.

[0097] The eighth connection section may have a structure similar to that of the third connection section 1211, the structure of the ninth connection section may be similar to that of the fourth connection section 1213, and the opening direction of the "U" shape formed by the first conductive member 120 is opposite to the opening direction of the "U" shape formed by the second conductive member.

[0098] For example, the opening of the "U" shape formed by the first conductive member 120 may be opened towards the first side wall of the circuit breaker. The opening of the "U" shape formed by the second conductive member may be opened towards the second side wall of the circuit breaker, and the first side wall and the second side wall are two relatively arranged side walls of the circuit breaker.

[0099] The connection method between the fourth conductive member 140 and the fourth thermal protection component 170 is similar to the connection method between the first conductive member 120 and the first thermal protection component 110, and details will not be expanded in this example of the present application.

[0100] By providing the connected fourth thermal protection component 170 and the fourth conductive member 140, the fourth conductive member 140 has a fourth connection portion and can be connected to the external wire. Therefore, on the basis that the circuit breaker is connected to the external wire through the first conductive member 120, by providing the fourth conductive member 140 to be connected to the external wire, the circuit breaker can be connected to two live wires in the external wire at the same time, expanding the usage range of the circuit breaker.

[0101] Based on the circuit breaker provided in the above example, the first thermal protection component 110 may only include a first bimetal sheet 111. The first bimetal sheet 111 may include a connected third bending section and a bending section. The third bending section is bent away from the residual current transformer 200 relative to the bending section to form a mounting groove.

[0102] At this time, when the circuit breaker is in an overloaded working state, the first conductive member 120 can provide heat to the first bimetallic strip 111, so that the first bimetallic strip 111 can bend and deform, thereby resisting the operating mechanism of the circuit breaker, causing the circuit breaker to trip.

[0103] The mounting groove can be set at the end of the third bending section away from the bending section, the mounting groove can also be set at the end of the third bending section close to the bending section, or the mounting groove can be set in the middle of the third bending section. The example of this application does not limit the specific setting position of the mounting groove.

[0104] Based on the above, the mounting groove is provided on the first bimetallic strip 111, and the first connecting portion 121 is connected to the groove wall of the mounting groove. In the prior art, the conductive member is provided on the side of the thermal element facing the residual current transformer 200. In the case where the size of the circuit breaker housing is consistent, the circuit breaker provided by the example of the present application has a length from the connection between the first connecting portion 121 and the groove wall of the mounting groove to the first wiring portion 122 that is greater than the length from the connection between the conductive member and the thermal element in the prior art to the wiring portion, which provides a larger installation space for the residual current transformer 200, facilitates the installation of the residual current transformer 200 and the first conductive member 120, and further improves the assembly efficiency of the residual current transformer 200 and the first conductive member 120.

[0105] In addition, when the first conductive member 120 in the example of the present application is consistent in size with the conductive member in the prior art, since the first connecting portion 121 is connected to the first bimetallic strip 111 through the groove wall of the mounting groove in the example of the present application, the first conductive member 120 and the first thermal protection component 110 are arranged more compactly in the base, which is conducive to the miniaturization of the circuit breaker.

[0106] Based on the circuit breaker provided in the above example, Figure 6 For a schematic diagram of the cooperation between the second thermal element and the second conductive member provided in this application example, please refer to Figure 1 , Figure 2 and Figure 6 The circuit breaker may further include a second thermal protection assembly 180 and a second conductive member 130. The second thermal protection assembly 180 is spaced apart from the first thermal protection assembly 110. The second conductive member 130 may include a third connecting portion 131 and a second wiring portion 132 connected to each other, wherein one end of the third connecting portion 131 away from the second wiring portion 132 is connected to the second thermal protection assembly 180, and one end of the second wiring portion 132 away from the third connecting portion 131 is connected to an external wire.

[0107] Exemplarily, the second thermal protection assembly 180, the second conductive member 130, and other structures within the circuit breaker may cooperate to form a loop within phase B of the circuit breaker.

[0108] The second thermal protection assembly 180 may include a second bimetallic strip and a second element 181 .

[0109] The shape of the second thermal protection component 180 may be consistent with that of the first thermal protection component 110 , that is, the structure of the second bimetallic strip may be the same as that of the first bimetallic strip 111 , and the structure of the second thermal element 181 may be the same as that of the first thermal element 112 .

[0110] The shape of the second thermal protection assembly 110 may also be different from the shape of the first thermal protection assembly 110 , and this example of the present application does not impose any specific limitation on this.

[0111] The shape of the second conductive member 130 can be consistent with the shape of the first conductive member 120, or it can be different from the shape of the first conductive member 120, which is not specifically limited in this example of the present application. The second wiring portion 132 can be specifically connected to a live wire in the external wire.

[0112] In the example of the present application, the second thermal protection assembly 180 and the second conductive member 130 are connected, and the second conductive member 130 has a second wiring portion 132, which can be connected to an external wire. Therefore, on the basis that the circuit breaker is connected to the external wire through the first conductive member 120, the second conductive member 130 can be connected to the external wire, so that the circuit breaker can be connected to two live wires in the external wire at the same time, thereby expanding the scope of use of the circuit breaker.

[0113] Based on the circuit breaker provided in the above example, please refer to Figure 6 The second thermal protection assembly 180 includes a second thermal element 181, and the second thermal element 181 includes a second fixing portion 1811 and a fourth connecting portion 1812 which are arranged at an angle. The second fixing portion 1811 is connected to the base of the circuit breaker, and the fourth connecting portion 1812 is connected to the second conductive member 130. A portion of the fourth connecting portion 1812 is basically parallel to the bottom wall of the base.

[0114] The structure of the second fixing portion 1811 is similar to that of the first fixing portion 1122 , and will not be described in detail in this example of the present application.

[0115] The fourth connecting portion 1812 may include a fourth bending section 18121 and a fifth connecting section 18122. The end of the fourth bending section 18121 away from the fifth connecting section 18122 may be connected to the second fixed portion 1811. The fourth bending section 18121 may be bent relative to the second fixed portion 1811 in a direction away from the bottom wall of the base. The fourth bending section 18121 may be basically perpendicular to the second fixed portion 1811.

[0116] The fifth connecting segment 18122 may be substantially perpendicular to the fourth bending segment 18121 and extend in a direction toward the residual current transformer 200 relative to the fourth bending segment 18121. The fifth connecting segment 18122 may be substantially parallel to the bottom wall of the base.

[0117] The fifth connecting section 18122 is connected to the second conductive member 130. The second conductive member 130 can be connected to the side of the fifth connecting section 18122 facing the bottom wall of the base, or the second conductive member 130 can be connected to the side of the fifth conductive member facing away from the bottom wall of the base. Alternatively, the second conductive member 130 can also be connected to other parts of the second conductive member 130, which is not specifically limited in this example of the application.

[0118] In summary, the second thermal element 181 can be fixedly connected to the base through the second fixing portion 1811. By setting the second fixing portion 1811 and the fourth connecting portion 1812 at an angle, and part of the fourth connecting portion 1812 being substantially parallel to the bottom wall of the base, the second conductive member 130 can be easily connected to the fourth connecting portion 1812.

[0119] Based on the circuit breaker provided in the above example, Figure 7 For a schematic diagram of the structure of a third conductive member provided in this application example, please refer to Figure 1 , Figure 2 and Figure 7 The circuit breaker may further include a third thermal protection assembly 160 and a third conductive member 150. The third thermal protection assembly 160 is spaced apart from the first thermal protection assembly 110 and spaced apart from the second thermal protection assembly 180. The third conductive member 150 may include a fifth connecting portion 151 and a third wiring portion 152 connected to each other, wherein one end of the fifth connecting portion 151 away from the third wiring portion 152 is connected to the third thermal protection assembly 160, and one end of the third wiring portion 152 away from the fifth connecting portion 151 is connected to an external wire.

[0120] Exemplarily, the third thermal protection assembly 160, the third conductive member 150 and other structures in the circuit breaker may cooperate to form a loop in the N-phase of the circuit breaker. Based on this, the third thermal protection assembly 160 may only include the third thermal element.

[0121] The shape of the third thermal element can be consistent with the shape of the first thermal element 112. At this time, the connection position of the third conductor 150 and the third thermal element is similar to the connection position of the first conductor 120 and the first thermal element 112, that is, the third conductor 150 is connected to the side of the third thermal element away from the residual current transformer 200.

[0122] The shape of the third thermal element may also be different from the shape of the first thermal element 112. For example, the structure of the third thermal element may be the same as the structure of the thermal element in the prior art. In this case, the connection position between the third thermal element and the third conductive member 150 is similar to the connection position between the thermal element and the conductive member in the prior art, that is, the third conductive member 150 is connected to the side of the third thermal element facing the residual current transformer 200.

[0123] The shape of the third conductive member 150 can be consistent with the shape of the first conductive member 120, or it can be different from the shape of the first conductive member 120, which is not specifically limited in this example of the present application. The third wiring portion 152 can be specifically connected to a neutral line in the external wire.

[0124] The present application example is described by taking the difference in structure between the third conductive element 150 and the first conductive element 120 as an example.

[0125] Exemplarily, the fifth connection portion 151 may include a sixth connection segment 1511, a fifth bending segment 1512, and a seventh connection segment 1513 connected in sequence. When the third conductive member 150 has a different structure from the first conductive member 120, the fifth bending segment 1512 may be a soft connection structure, such as a copper braided wire, a copper belt, or other soft connection structures.

[0126] By setting the fifth bending section 1512 as a soft connection structure, the third conductive member 150 and the residual current transformer 200 can be easily matched due to the high flexibility of the soft connection structure, thereby improving the assembly efficiency of the third conductive member 150 and the residual current transformer 200.

[0127] In the example of the present application, by providing a third thermal protection assembly 160 and a third conductive member 150 connected to each other, the third conductive member 150 has a third wiring portion 152 that can be connected to a neutral line in an external conductor, thereby improving the performance of the circuit breaker.

[0128] Based on the circuit breaker provided in the above example, please refer to Figure 1 , Figure 3 and Figure 6 The thermal protection assembly may further include an identification structure, which is disposed on a side of the first thermal protection assembly 110 facing the residual current transformer 200. And / or, the identification structure is disposed on a side of the second thermal protection assembly 180 facing away from the bottom wall of the base. And / or, the identification structure is disposed on a side of the third thermal protection assembly 160 facing the residual current transformer 200.

[0129] The identification structure may be any one of words, numbers, letters, patterns, etc., or a combination of at least two of them.

[0130] The identification structure can identify the scope of use of the circuit breaker. For example, the rated voltage of the circuit breaker can be identified by numbers, or the rated current or other values ​​of the circuit breaker can be identified by numbers, so as to facilitate the operator to assemble the circuit breaker and reduce the possibility of mis-installation or error installation of the circuit breaker.

[0131] The identification structure is disposed on a side of the first thermal protection assembly 110 facing the residual current transformer 200 , and specifically can be disposed on a side of the first thermal element 112 facing the residual current transformer 200 .

[0132] The identification structure is disposed on a side of the second thermal protection assembly 180 away from the bottom wall of the base, and specifically can be disposed on a side of the second thermal element 181 away from the bottom wall of the base.

[0133] The identification structure is arranged on a side of the third thermal protection assembly 160 facing the residual current transformer 200 , and specifically can be arranged on a side of the third thermal element facing the residual current transformer 200 .

[0134] Based on the different phase numbers of the circuit breaker, the identification structure may be provided on at least one of the first thermal protection assembly 110 , the second thermal protection assembly 180 , the third thermal protection assembly 160 and the fourth thermal protection assembly 170 .

[0135] Based on the above, in the example of the present application, the circuit breaker can be marked by setting an identification structure, which is convenient for operators to assemble the circuit breaker and reduces the possibility of wrong installation or misinstallation of the circuit breaker.

[0136] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A circuit breaker, characterized in that: include: A residual current transformer is provided with a through hole; A first thermal protection component, provided with a mounting groove, wherein the first thermal protection component is arranged on one side of the residual current transformer; The first conductive member includes a first connecting portion and a first wiring portion connected to each other, a portion of the first connecting portion is passed through the through hole, an end of the first connecting portion away from the first wiring portion extends into the mounting groove and is connected to the first thermal protection component, and the first wiring portion is connected to an external wire.

2. The circuit breaker according to claim 1, characterized in that: The first thermal protection assembly comprises a first bimetallic strip and a first thermal element connected to each other, wherein the first thermal element is arranged on a side of the first bimetallic strip facing the residual current transformer; The installation slot is arranged between the first bimetallic strip and the first thermal element, and one end of the first connecting portion away from the first wiring portion extends into the installation slot and is connected to a slot wall of the installation slot.

3. The circuit breaker according to claim 2, characterized in that: The first thermal element includes a first fixing portion and a second connecting portion, the first fixing portion is connected to the base of the circuit breaker, and at least a portion of the second connecting portion is bent along a direction toward the residual current transformer to form the installation groove.

4. The circuit breaker according to claim 3, characterized in that: The second connecting portion includes a first connecting section, a first bending section and a second connecting section which are connected in sequence; One end of the first connecting section away from the first bending section is connected to the first fixing portion, the first bending section is bent relative to the first connecting section along a direction toward the residual current transformer to form the installation groove, and one end of the first bending section away from the first connecting section is connected to the second connecting section.

5. The circuit breaker according to any one of claims 1 to 4, characterized in that: The first connecting portion includes a third connecting section, a second bending section and a fourth connecting section which are connected in sequence; One end of the third connecting section away from the second bending section extends into the mounting groove and is connected to the first thermal protection component, the second bending section is bent relative to the third connecting section in a direction toward the residual current transformer, and the second bending section is penetrated by the through hole, and one end of the fourth connecting section away from the second bending section is connected to the first wiring portion.

6. The circuit breaker according to claim 1, characterized in that: The first thermal protection component includes a first bimetallic strip, the first bimetallic strip includes a third bending section and a bending section connected to each other, the third bending section is bent relative to the bending section in a direction away from the residual current transformer to form the installation groove.

7. The circuit breaker according to any one of claims 1 to 4 and 6, characterized in that: Also includes: A second thermal protection component is spaced apart from the first thermal protection component; The second conductive member includes a third connecting portion and a second wiring portion connected to each other, wherein one end of the third connecting portion away from the second wiring portion is connected to the second thermal protection component, and one end of the second wiring portion away from the third connecting portion is connected to an external wire.

8. The circuit breaker according to claim 7, characterized in that: The second thermal protection assembly includes a second thermal element, which includes a second fixing portion and a fourth connecting portion arranged at an angle, the second fixing portion is connected to the base of the circuit breaker, the fourth connecting portion is connected to the second conductive member, and a portion of the fourth connecting portion is basically parallel to the bottom wall of the base.

9. The circuit breaker according to claim 8, characterized in that Also includes: a third thermal protection component, spaced apart from the first thermal protection component and spaced apart from the second thermal protection component; The third conductive member includes a fifth connecting portion and a third wiring portion connected to each other, wherein one end of the fifth connecting portion away from the third wiring portion is connected to the third thermal protection component, and one end of the third wiring portion away from the fifth connecting portion is connected to an external wire.

10. The circuit breaker according to claim 9, characterized in that The thermal protection assembly also includes a marking structure, The identification structure is arranged on a side of the first thermal protection component facing the residual current transformer; and / or, The identification structure is arranged on a side of the second thermal protection component away from the bottom wall of the base; and / or, The identification structure is arranged on a side of the third thermal protection component facing the residual current transformer.

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