Circuit breaker and power distribution system

Abstract

The application provides a circuit breaker and power distribution system, and relates to the technical field of low-voltage electrical apparatuses. The circuit breaker is electrically connected with an external wire through a connecting shaft. The circuit breaker comprises a shell, an internal conductive loop and a connecting sleeve. A shell wall of the shell is provided with a first mounting hole. The internal conductive loop is fixedly installed in the interior of the shell. The connecting sleeve is fixedly installed to the shell, and an end of the connecting sleeve is electrically connected with the internal conductive loop. The mounting position of the connecting sleeve corresponds to the setting position of the first mounting hole, so that the connecting shaft can extend into the interior of the connecting sleeve from the first mounting hole and be in surface contact with the connecting sleeve, thereby realizing the electrical connection between the connecting sleeve and the connecting shaft. According to the circuit breaker provided in the example of the application, the connection reliability of the circuit breaker and the external wire can be ensured, and the connection efficiency of the circuit breaker and the external wire is improved.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and more particularly to a circuit breaker and power distribution system. Background Technology

[0002] Circuit breakers can switch from the closed state to the open state in the event of faults such as short circuits, overloads, and leakage in the circuit, thereby reducing the possibility of further expansion of the fault in the circuit and providing safety protection for the circuit.

[0003] Based on the existing circuit breaker structure, the circuit breaker includes wiring terminals, and the external wires can be electrically connected to the circuit breaker through the wiring terminals.

[0004] However, during the electrical connection between the terminal block and the external wire, the operator needs to manually connect and adjust the terminal block. During this manual connection, unreliable connections may occur, affecting the safety and reliability of the system. Utility Model Content

[0005] This application provides a circuit breaker and power distribution system that can ensure the reliability of the connection between the circuit breaker and the external conductor, and improve the connection efficiency between the circuit breaker and the external conductor.

[0006] In a first aspect, this application provides a circuit breaker. The circuit breaker is electrically connected to an external conductor via a connecting shaft. The circuit breaker includes a housing, an internal conductive circuit, and a connecting sleeve. The housing wall has a first mounting hole. The internal conductive circuit is fixedly installed inside the housing. The connecting sleeve is fixedly installed to the housing, and its end is electrically connected to the internal conductive circuit. The mounting position of the connecting sleeve corresponds to the position of the first mounting hole, so that the connecting shaft can extend into the interior of the connecting sleeve from the first mounting hole and contact the surface of the connecting sleeve, thereby realizing the electrical connection between the connecting sleeve and the connecting shaft.

[0007] In this application example, the housing provides a mounting carrier for the internal conductive circuit and the connecting sleeve. The connecting sleeve is part of the circuit breaker, and the connecting shaft can extend into the connecting sleeve and be electrically connected to it. The connecting shaft is electrically connected to the external conductor. Therefore, the electrical connection between the external conductor and the circuit breaker can be achieved through the cooperation of the connecting sleeve and the connecting shaft.

[0008] Compared to existing technologies, where the external conductor may become unreliable due to operator adjustments of the adjusting screw during the connection process between the external conductor and the circuit breaker, this application example achieves the electrical connection between the external conductor and the circuit breaker by inserting a connecting shaft into the connecting sleeve and engaging with the sleeve. This avoids the need for manual adjustment of the adjusting screw, improves the efficiency of the connection, and ensures a larger contact area between the connecting shaft and the connecting sleeve, thus guaranteeing the reliability of the connection and consequently the reliability of the electrical connection between the external conductor and the circuit breaker.

[0009] In some possible implementations, the connecting sleeve has a second mounting hole inside, the size of which gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve. The size of the connecting shaft gradually decreases along the direction in which it extends into the connecting sleeve, and the sidewall of the connecting shaft contacts the wall surface of the second mounting hole.

[0010] In this application example, the second mounting hole is located in the connecting sleeve. Along the direction in which the connecting shaft extends into the connecting sleeve, the size of the second mounting hole gradually decreases, and the size of the connecting shaft also gradually decreases. This makes the fit between the connecting shaft and the hole wall of the second mounting hole have a greater load-bearing capacity, thereby making the fit between the connecting shaft and the connecting sleeve through the second mounting hole more reliable, and further ensuring the reliability of the connection between the external conductor and the circuit breaker.

[0011] Furthermore, since the size of the second mounting hole gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve, and the size of the connecting shaft also gradually decreases, the end with the smallest size of the connecting shaft can be the first to enter the part with the largest size of the second mounting hole during the process of the connecting shaft extending into the connecting sleeve, which is beneficial to improving the assembly efficiency of the connecting shaft and the connecting sleeve.

[0012] In some possible implementations, the housing has an internal mounting cavity that communicates with the first mounting hole. The mounting cavity is used to mount the connecting sleeve. A limiting platform is provided at the connection between the mounting cavity and the first mounting hole, and the connecting sleeve abuts against the side of the limiting platform facing the mounting cavity.

[0013] In this application example, by providing an installation cavity inside the housing and installing a connecting sleeve within the installation cavity, the position of the connecting sleeve within the housing can be limited, reducing the amplitude of the connecting sleeve's sway relative to the housing. By providing a limiting platform at the connection between the installation cavity and the first installation hole, and by having the connecting sleeve abut against the side of the limiting platform facing the installation cavity, the position of the connecting sleeve within the housing can be further limited, reducing the amplitude of the connecting sleeve's sway relative to the housing and ensuring the reliability of the connection between the connecting sleeve and the housing.

[0014] In some possible implementations, the wall of the second mounting hole is provided with a first snap-fit ​​structure, and the connecting shaft is provided with a second snap-fit ​​structure at the position corresponding to the first snap-fit ​​structure, and the first snap-fit ​​structure and the second snap-fit ​​structure snap-fit ​​together.

[0015] In this application example, since the first snap-fit ​​structure is located on the wall of the second mounting hole, the second mounting hole is located inside the connecting sleeve, and the second snap-fit ​​structure is located on the connecting shaft, a reliable connection between the connecting sleeve and the connecting shaft can be achieved through the snap-fit ​​of the first snap-fit ​​structure and the second snap-fit ​​structure, thereby further ensuring the reliability of the connection between the connecting sleeve and the connecting shaft.

[0016] In some possible implementations, the first snap-fit ​​structure is a snap-fit ​​protrusion, and the second snap-fit ​​structure is a snap-fit ​​groove, with the snap-fit ​​protrusion snapping into the snap-fit ​​groove. Alternatively, the first snap-fit ​​structure is a snap-fit ​​groove, and the second snap-fit ​​structure is a snap-fit ​​protrusion, with the snap-fit ​​protrusion snapping into the snap-fit ​​groove.

[0017] In this application example, whether the first snap-fit ​​structure is a snap-fit ​​protrusion and the second snap-fit ​​structure is a snap-fit ​​groove, or the first snap-fit ​​structure is a snap-fit ​​groove and the second snap-fit ​​structure is a snap-fit ​​protrusion, one of the snap-fit ​​protrusion and the snap-fit ​​groove can be located on the wall of the second mounting hole, and the other can be located on the connecting shaft. Since the second mounting hole is located on the connecting sleeve, a reliable connection between the connecting sleeve and the connecting shaft can be achieved through the cooperation of the snap-fit ​​protrusion and the snap-fit ​​groove.

[0018] In some possible implementations, the first snap-fit ​​structure has a first guide surface on the side near the first mounting hole, and the inclination direction of the first guide surface is adapted to the snap-fit ​​direction of the second snap-fit ​​structure snapping into the first snap-fit ​​structure.

[0019] In this application example, by providing a first guide surface on the side of the first snap-fit ​​structure near the first mounting hole, and the inclination direction of the first guide surface being adapted to the snap-fit ​​direction of the second snap-fit ​​structure snapping into the first snap-fit ​​structure, the second snap-fit ​​structure first contacts the position of the first snap-fit ​​structure closest to the wall of the second mounting hole during the snap-fit ​​process, thereby reducing the resistance during the snap-fit ​​process between the second snap-fit ​​mechanism and the first snap-fit ​​structure and ensuring the snap-fit ​​efficiency between the second snap-fit ​​structure and the first snap-fit ​​structure.

[0020] Furthermore, during the process of the second snap-fit ​​structure disengaging from the first snap-fit ​​structure, the second snap-fit ​​structure gradually moves from the first snap-fit ​​structure to the wall of the second mounting hole via the first guide surface. Therefore, by setting the first guide surface, the frictional force during the disengagement process of the second snap-fit ​​structure from the first snap-fit ​​structure can be reduced, thereby improving the efficiency of the disengagement of the second snap-fit ​​structure from the first snap-fit ​​structure.

[0021] In some possible implementations, the internal conductive circuit includes a terminal block, one end of which is fixedly connected to a connecting sleeve.

[0022] In this application example, the terminal block is part of the internal conductive circuit. By setting the terminal block to be fixedly connected to the connecting sleeve, the electrical connection between the connecting sleeve and the internal conductive circuit can be realized, ensuring the reliability of the electrical connection between the connecting sleeve and the internal conductive circuit.

[0023] Secondly, this application provides a power distribution system. The power distribution system includes a mounting enclosure and a circuit breaker provided in the first aspect and its possible implementations, with a connecting shaft fixedly mounted to the mounting enclosure.

[0024] The beneficial effects of the circuit breakers provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here.

[0025] In some possible implementations, the power distribution system also includes a fixed structure that is rotatably mounted to a mounting enclosure. When the circuit breaker is engaged with the mounting enclosure, the end of the fixed structure away from the rotation center can rotate to a position connected to the circuit breaker housing.

[0026] In this application example, based on the circuit breaker's cooperation with the mounting box through the connecting sleeve and connecting shaft, since one end of the fixed structure is connected to the mounting box, and the other end can rotate to a position that cooperates with the housing when the circuit breaker is in cooperation with the mounting box, the reliability of the cooperation between the circuit breaker and the mounting box is further guaranteed, and the safety of the power distribution system is ensured.

[0027] In some possible implementations, the fixing structure includes a first rotating segment and a second rotating segment spaced apart. The first end of both the first and second rotating segments is rotatably connected to the mounting housing. The second end of the first rotating segment has a first connecting structure facing the side of the second rotating segment, which can connect to the side of the housing opposite to the first mounting hole. The second end of the second rotating segment has a second connecting structure facing the side of the first rotating segment, which can connect to the side of the housing opposite to the first mounting hole.

[0028] In this example, since the first end of the first rotating section is rotatably connected to the mounting housing, and the second end of the first rotating section is provided with a first connecting structure that can be connected to the circuit breaker housing, a reliable connection between the circuit breaker and the mounting housing can be ensured through the first rotating section. Similarly, since the first end of the second rotating section is rotatably connected to the mounting housing, and the second end of the second rotating section is provided with a first connecting structure that can be connected to the circuit breaker housing, a reliable connection between the circuit breaker and the mounting housing can be ensured through the second rotating section. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a circuit breaker provided as an example of this application.

[0030] Figure 2 This is a schematic diagram of the internal structure of a circuit breaker provided as an example of this application.

[0031] Figure 3 This is a schematic diagram of a connecting sleeve provided as an example of this application.

[0032] Figure 4 This is a schematic diagram of the internal structure of a connecting sleeve provided as an example of this application.

[0033] Figure 5 A schematic diagram of a shell structure provided as an example of this application.

[0034] Figure 6 This is a schematic diagram of the internal structure of a connecting sleeve provided as an example of this application.

[0035] Explanation of reference numerals in the attached figures: 100 Circuit breaker; 110 Housing; 111 Mounting cavity; 112 First mounting hole; 113 Limiting platform; 120 Internal conductive circuit; 121 Terminal block; 130 Connecting sleeve; 131 Second mounting hole; 132 First snap-fit ​​structure. Detailed Implementation

[0036] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0038] In this document, the term "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.

[0039] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0040] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the circuit breaker and power distribution system of this application.

[0041] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned 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.

[0042] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0043] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] To enable those skilled in the art to better understand the present application, the circuit breaker and power distribution system provided in the example of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0045] For example, this application provides a circuit breaker. Figure 1 This application provides a schematic diagram of the structure of a circuit breaker as an example. Figure 2 Please refer to the schematic diagram of the internal structure of a circuit breaker provided as an example in this application. Figure 1and Figure 2 The circuit breaker 100 is electrically connected to an external conductor via a connecting shaft. The circuit breaker 100 includes a housing 110, an internal conductive circuit 120, and a connecting sleeve 130. The housing 110 has a first mounting hole 112 on its wall. The internal conductive circuit 120 is fixedly installed inside the housing 110. The connecting sleeve 130 is fixedly installed to the housing 110, and its end is electrically connected to the internal conductive circuit 120. The mounting position of the connecting sleeve 130 corresponds to the position of the first mounting hole 112, allowing the connecting shaft to extend from the first mounting hole 112 into the interior of the connecting sleeve 130 and contact the surface of the connecting sleeve 130, thus achieving an electrical connection between the connecting sleeve 130 and the connecting shaft.

[0046] Circuit breaker 100 can be a single-pole circuit breaker or a multi-pole circuit breaker. Taking a single-pole circuit breaker 100 as an example, circuit breaker 100 includes an internal conductive circuit 120 formed by the contact mechanism, thermal protection structure, and other structures. Depending on the type of circuit breaker 100, the specific composition of the internal conductive circuit 120 may differ; this application example does not limit the specific structure of the internal conductive circuit 120.

[0047] The housing 110 is made of insulating material, such as polyvinyl chloride, polycarbonate (also known as PC plastic), etc. The housing 110 made of insulating material can reduce the possibility of current escaping from the housing 110 to the outside of the housing 110, thus ensuring the safety of the circuit breaker 100 in use.

[0048] The connecting shaft can be fixedly installed on other structures connected to the circuit breaker 100, or the connecting shaft can be set independently and used only for electrically connecting the circuit breaker 100 and the external conductor. The example in this application is only described with the connecting shaft fixedly installed on other structures connected to the circuit breaker 100.

[0049] There may be only one connecting sleeve 130, in which case the connecting sleeve 130 is electrically connected to either end of the internal conductive circuit 120. Alternatively, there may be two connecting sleeves 130 spaced apart, in which case one connecting sleeve 130 is electrically connected to one end of the internal conductive circuit 120, and the other connecting sleeve 130 is electrically connected to the other end of the internal conductive circuit 120. This application example only uses two connecting sleeves 130 spaced apart as an example for illustrative description.

[0050] The connecting sleeve 130 can be electrically connected to the internal conductive circuit 120 by means of welding, threaded connection, riveting, etc. This application example does not specifically limit this.

[0051] The mounting position of the connecting sleeve 130 corresponds to the setting position of the first mounting hole 112, so that the first end of the connecting shaft can extend into the connecting sleeve 130 from the first mounting hole 112 and contact the surface of the connecting sleeve 130, thereby realizing the electrical connection between the connecting shaft and the connecting sleeve 130. The second end of the connecting shaft is electrically connected to an external wire.

[0052] The second end of the connecting shaft can be provided with a wiring groove so that an external wire can be snapped into the wiring groove to achieve an electrical connection between the connecting shaft and the external wire. Alternatively, the second end of the connecting shaft can be provided with a wiring hole. The diameter of the wiring hole can be parallel to the diameter of the connecting shaft. In this case, an external wire can be electrically connected to the connecting shaft using a screw. Alternatively, the diameter of the wiring hole can be perpendicular to the diameter of the connecting shaft. In this case, the external wire can be threaded through the wiring hole to electrically connect with the connecting shaft.

[0053] In this application example, the housing 110 provides a mounting carrier for the internal conductive circuit 120 and the connecting sleeve 130. The connecting sleeve 130 is part of the circuit breaker 100, and the connecting shaft can extend into the connecting sleeve 130 and be electrically connected to the connecting sleeve 130. The connecting shaft is electrically connected to the external wire. Therefore, the electrical connection between the external wire and the circuit breaker 100 can be achieved through the cooperation of the connecting sleeve 130 and the connecting shaft.

[0054] Compared to existing technologies, where the connection between the external wire and the circuit breaker may be unreliable due to operator adjustments of the adjusting screw during the process of connecting the external wire to the terminal block, in this application example, the connection between the external wire and the circuit breaker 100 is achieved by the connecting shaft extending into the connecting sleeve 130 and engaging with the connecting sleeve 130. This avoids the need for manual adjustment of the adjusting screw by the operator, improves the efficiency of the connection between the external wire and the circuit breaker 100, and ensures the reliability of the connection between the connecting shaft and the connecting sleeve 130 by having a larger contact area. This, in turn, ensures the reliability of the connection between the external wire and the circuit breaker 100.

[0055] Based on the power distribution system provided in the above example, Figure 3 This application provides a schematic diagram of the structure of a connecting sleeve as an example. Figure 4 Please refer to the schematic diagram of the internal structure of a connecting sleeve provided as an example in this application. Figure 3 and Figure 4 The connecting sleeve 130 has a second mounting hole 131 inside. The size of the second mounting hole 131 gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve 130. The size of the connecting shaft gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve 130, and the side wall of the connecting shaft contacts the hole wall surface of the second mounting hole 131.

[0056] As the connecting shaft extends into the connecting sleeve 130, its dimensions gradually decrease, meaning it has a frustum-shaped structure. The shape of the second mounting hole 131 matches the shape of the connecting shaft. For example, the connecting shaft can be frustum-shaped or truncated pyramidal.

[0057] When the connecting shaft and the connecting sleeve 130 are assembled, at the same position along the direction in which the connecting shaft extends into the connecting sleeve 130, the size of the second mounting hole 131 is basically equal to the size of the connecting shaft.

[0058] Taking the cross-section of the second mounting hole 131 as a circular hole and the connecting shaft as a frustum as an example, the size of the second mounting hole 131 is basically equal to the size of the connecting shaft. It can be understood that at the same position, based on the fact that the size of the connecting shaft is smaller than the size of the second mounting hole 131, the difference between the diameter of the connecting shaft and the diameter of the second mounting hole 131 is less than or equal to 0.3 mm.

[0059] In this application example, the second mounting hole 131 is provided in the connecting sleeve 130. Along the direction in which the connecting shaft extends into the connecting sleeve 130, the size of the second mounting hole 131 gradually decreases, and the size of the connecting shaft also gradually decreases. This makes the fit between the connecting shaft and the hole wall of the second mounting hole 131 have a greater load-bearing capacity, thereby making the fit between the connecting shaft and the connecting sleeve 130 through the second mounting hole 131 more reliable, and further ensuring the reliability of the connection between the external wire and the circuit breaker 100.

[0060] Furthermore, since the size of the second mounting hole 131 gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve 130, and the size of the connecting shaft also gradually decreases, the end with the smallest size of the connecting shaft can be the first to extend into the part with the largest size of the second mounting hole 131 during the process of the connecting shaft extending into the connecting sleeve 130, which is beneficial to improving the assembly efficiency of the connecting shaft and the connecting sleeve 130.

[0061] Based on the power distribution system provided in the above example, Figure 5 Please refer to the structural schematic diagram of a shell provided as an example in this application. Figures 1-5 The housing 110 has an internal mounting cavity 111, which is connected to the first mounting hole 112. The mounting cavity 111 is used to mount the connecting sleeve 130. A limiting platform 113 is provided at the connection between the mounting cavity 111 and the first mounting hole 112. The connecting sleeve 130 abuts against the limiting platform 113 on the side facing the mounting cavity 111.

[0062] The limiting platform 113 can be a protrusion located at the junction of the mounting cavity 111 and the first mounting hole 112. Alternatively, by setting a first dimension smaller than a second dimension, the limiting platform 113 can be formed at the junction of the mounting cavity 111 and the first mounting hole 112, wherein the dimension of the first mounting hole 112 near the mounting cavity 111 is the first dimension, and the dimension of the mounting cavity 111 near the first mounting hole 112 is the second dimension.

[0063] In this application example, by providing a mounting cavity 111 inside the housing 110 and installing a connecting sleeve 130 inside the mounting cavity 111, the position of the connecting sleeve 130 within the housing 110 can be limited, reducing the amplitude of the connecting sleeve 130's wobbling relative to the housing 110. By providing a limiting platform 113 at the communication point between the mounting cavity 111 and the first mounting hole 112, and by having the connecting sleeve 130 abut against the limiting platform 113 on the side facing the mounting cavity 111, the position of the connecting sleeve 130 within the housing 110 can be further limited, reducing the amplitude of the connecting sleeve 130's wobbling relative to the housing 110 and ensuring the reliability of the connection between the connecting sleeve 130 and the housing 110.

[0064] Based on the power distribution system provided in the above example, Figure 6 Please refer to the schematic diagram of the internal structure of a connecting sleeve provided as an example in this application. Figure 6 The second mounting hole 131 has a first snap-fit ​​structure 132 on its hole wall, and the connecting shaft has a second snap-fit ​​structure at the position corresponding to the first snap-fit ​​structure 132. The first snap-fit ​​structure 132 snaps into the second snap-fit ​​structure.

[0065] There may be only one first snap-fit ​​structure 132, or there may be multiple first snap-fit ​​structures 132 spaced apart. The number of second snap-fit ​​structures is equal to the number of first snap-fit ​​structures 132, and the positions of the second snap-fit ​​structures correspond to the positions of the first snap-fit ​​structures 132, so that the first snap-fit ​​structures 132 and the second snap-fit ​​structures can snap together.

[0066] Along the direction in which the connecting shaft extends into the connecting sleeve 130, whether the size of the second mounting hole 131 remains unchanged or the size of the second mounting hole 131 gradually decreases, only one first snap-fit ​​structure 132 can be provided, so as to ensure a reliable connection between the connecting shaft and the connecting sleeve 130 on the basis of a large contact area between the connecting shaft and the connecting sleeve 130.

[0067] As the size of the second mounting hole 131 gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve 130, multiple first snap-fit ​​structures 132 may be provided at intervals. This application example does not impose specific limitations on the arrangement of snap-fit ​​protrusions and snap-fit ​​grooves, as long as a reliable connection between the connecting shaft and the connecting sleeve 130 is ensured while maintaining a large contact area between them.

[0068] In this application example, since the first snap-fit ​​structure 132 is provided on the wall of the second mounting hole 131, the second mounting hole 131 is provided inside the connecting sleeve 130, and the second snap-fit ​​structure is provided on the connecting shaft, the reliable connection between the connecting sleeve 130 and the connecting shaft can be achieved by snapping the first snap-fit ​​structure 132 and the second snap-fit ​​structure, further ensuring the reliability of the connection between the connecting sleeve 130 and the connecting shaft.

[0069] Based on the power distribution system provided in the example above, please refer to... Figure 6 The first snap-fit ​​structure 132 is a snap-fit ​​protrusion, and the second snap-fit ​​structure is a snap-fit ​​groove, with the snap-fit ​​protrusion snapping into the snap-fit ​​groove. Alternatively, the first snap-fit ​​structure is a snap-fit ​​groove (not shown in the figure), and the second snap-fit ​​structure is a snap-fit ​​protrusion, with the snap-fit ​​protrusion snapping into the snap-fit ​​groove.

[0070] Taking an example where both a snap-fit ​​protrusion and a snap-fit ​​groove are provided along the direction extending into the connecting sleeve 130 along the connecting shaft, along the circumferential direction of the second mounting hole 131, there may be only one snap-fit ​​protrusion. In this case, along the circumferential direction of the second mounting hole 131, the beginning and end of the snap-fit ​​protrusion may be connected or spaced apart. Along the circumferential direction of the second mounting hole 131, the snap-fit ​​protrusion may also include multiple spaced sub-protrusions. The specific arrangement of the snap-fit ​​groove corresponds to the specific arrangement of the first snap-fit ​​protrusion, as long as it ensures that the snap-fit ​​protrusion can snap into the snap-fit ​​groove.

[0071] In this application example, whether the first snap-fit ​​structure 132 is a snap-fit ​​protrusion and the second snap-fit ​​structure is a snap-fit ​​groove, or the first snap-fit ​​structure 132 is a snap-fit ​​groove and the second snap-fit ​​structure is a snap-fit ​​protrusion, one of the snap-fit ​​protrusion and the snap-fit ​​groove can be provided on the wall of the second mounting hole 131 and the other can be provided on the connecting shaft. Since the second mounting hole 131 is provided on the connecting sleeve 130, a reliable connection between the connecting sleeve 130 and the connecting shaft can be achieved through the cooperation of the snap-fit ​​protrusion and the snap-fit ​​groove.

[0072] Based on the power distribution system provided in the example above, please refer to section 2. Figure 6 The first snap-fit ​​structure 132 has a first guide surface on the side near the first mounting hole 112, and the inclination direction of the first guide surface is adapted to the snap-fit ​​direction of the second snap-fit ​​structure snapping into the first snap-fit ​​structure 132.

[0073] In this application example, by providing a first guide surface on the side of the first snap-fit ​​structure 132 near the first mounting hole 112, and the inclination direction of the first guide surface being adapted to the snap-fit ​​direction of the second snap-fit ​​structure snapping into the first snap-fit ​​structure 132, the second snap-fit ​​structure first contacts the position in the first snap-fit ​​structure 132 closest to the wall of the second mounting hole 131, thereby reducing the resistance during the snap-fit ​​process between the second snap-fit ​​mechanism and the first snap-fit ​​structure 132 and ensuring the snap-fit ​​efficiency between the second snap-fit ​​structure and the first snap-fit ​​structure 132.

[0074] Furthermore, during the process of the second snap-fit ​​structure disengaging from the first snap-fit ​​structure 132, the second snap-fit ​​structure gradually moves from the first snap-fit ​​structure 132 to the wall of the second mounting hole 131 via the first guide surface. Therefore, by setting the first guide surface, the frictional force during the disengagement process of the second snap-fit ​​structure from the first snap-fit ​​structure 132 can be reduced, thereby improving the efficiency of the disengagement of the second snap-fit ​​structure from the first snap-fit ​​structure 132.

[0075] When the connecting shaft and the connecting sleeve 130 are engaged, a second guide surface may be provided at the position of the second snap-fit ​​structure near the first mounting hole 112. The structure and function of the second guide surface are similar to those of the first guide surface, and will not be described in detail here.

[0076] When multiple first snap-fit ​​protrusions are spaced apart along the direction extending into the connecting sleeve 130 along the connecting shaft, a third guide surface may be provided on the first snap-fit ​​protrusions in the direction away from the first mounting hole 112. The structure and function of the third guide surface are similar to those of the first guide surface, and will not be described in detail here. Correspondingly, a fourth guide surface may be provided at the position of the second snap-fit ​​structure away from the first mounting hole 112. The structure and function of the fourth guide surface are similar to those of the first guide surface, and will not be described in detail here.

[0077] Based on the power distribution system provided in the above example, the internal conductive circuit 120 includes a terminal block 121, one end of which is fixedly connected to the connecting sleeve 130.

[0078] The end of the terminal block 121 facing away from the connecting sleeve 130 is electrically connected to other structures inside the conductive circuit by welding.

[0079] The terminal block 121 has a through hole at the end near the connecting sleeve 130. Threaded parts, riveting parts or other connecting parts can be inserted through the through hole and fixedly connected to the connecting sleeve 130. This application example does not impose specific restrictions on the connection method between the terminal block 121 and the connecting sleeve 130.

[0080] Taking a single-pole circuit breaker including two connecting sleeves 130 as an example, the terminal block 121 includes an inlet plate and an outlet plate. The connection method between the inlet plate and the connecting sleeve 130 can be the same as the connection method between the outlet plate and the connecting sleeve 130, or the connection method between the inlet plate and the connecting sleeve 130 can be different from the connection method between the outlet plate and the connecting sleeve 130. This application example does not impose specific limitations on this.

[0081] In this application example, the terminal block 121 is part of the internal conductive circuit 120. By setting the terminal block 121 to be fixedly connected to the connecting sleeve 130, the electrical connection between the connecting sleeve 130 and the internal conductive circuit 120 can be realized, ensuring the reliability of the electrical connection between the connecting sleeve 130 and the internal conductive circuit 120.

[0082] For example, this application provides a power distribution system, which includes a mounting box and the circuit breaker 100 provided in the example above, with the connecting shaft fixedly installed to the mounting box.

[0083] The mounting enclosure can be either a meter box or a distribution box. This application example only describes the case where the mounting enclosure is a meter box.

[0084] The power distribution system includes meter boxes and circuit breakers 100. The meter boxes and circuit breakers 100 work together to form a power distribution system that integrates "electricity metering, electricity distribution, power control and safety protection".

[0085] Meter boxes can centralize key electrical equipment and wiring in a power distribution system, making it convenient for operators to maintain and repair the electrical equipment and wiring within the distribution phase. They can also reduce the possibility of dust, water, and other impurities in the external environment affecting the location of electrical equipment and wiring, ensuring the reliability and safety of the power distribution system.

[0086] A connecting shaft is fixedly installed on the wall of the meter box. The number of connecting shafts is equal to the number of mounting sleeves, and the position of the connecting shaft corresponds to the position of the connecting sleeve 130. The first end of the connecting shaft extends toward the inside of the meter box to ensure that when the circuit breaker 100 is installed inside the meter box, the connecting shaft can extend into the connecting sleeve 130 and reliably connect with the connecting sleeve 130.

[0087] Circuit breaker 100 is electrically connected to the user circuit via an external conductor. Circuit breaker 100 can control the connection and disconnection between the power distribution system and the user circuit, so that operators can perform maintenance and repair on the user circuit. Circuit breaker 100 can also provide safety protection for the user circuit and the power distribution system, reduce the possibility of fault escalation in the user circuit and the power distribution system, and ensure the safety and reliability of the user circuit and the power distribution system.

[0088] The circuit breaker 100 mentioned in this application example has the same structure and similar function as the circuit breaker 100 provided in the previous embodiment, and will not be described again in this application example.

[0089] Based on the power distribution system provided in the above example, the power distribution system also includes a fixed structure that is rotatably installed in a mounting enclosure. When the circuit breaker 100 is engaged with the mounting enclosure, the end of the fixed structure away from the rotation center can be rotated to a position connected to the housing 110 of the circuit breaker 100.

[0090] A fixed structure can be a single structure or it can include two structures spaced apart. This application does not impose any specific limitations on this.

[0091] In this application example, based on the circuit breaker 100 cooperating with the mounting box through the connecting sleeve 130 and the connecting shaft, since one end of the fixed structure is connected to the mounting box, and the other end can rotate to the position cooperating with the housing 110 when the circuit breaker 100 is cooperating with the mounting box, the reliability of the cooperation between the circuit breaker 100 and the mounting box is further guaranteed, and the safety of the power distribution system is guaranteed.

[0092] Based on the power distribution system provided in the above example, the fixed structure includes a first rotating section and a second rotating section arranged at intervals. The first end of the first rotating section and the first end of the second rotating section can be rotatably connected to the mounting housing. The second end of the first rotating section is provided with a first connecting structure on the side facing the second rotating section. The first connecting structure can be connected to the side of the housing 110 away from the first mounting hole 112. The second end of the second rotating section is provided with a second connecting structure on the side facing the first rotating section. The second connecting structure can be connected to the side of the housing 110 away from the first mounting hole 112.

[0093] At least a portion of the first rotating section and at least a portion of the second rotating section are located on opposite sides of the housing 110 to apply force to the housing 110 from different positions and directions, ensuring a reliable connection between the circuit breaker 100 and the mounting box.

[0094] The first connection structure can be a protruding structure, in which case the corresponding position of the housing 110 is provided with a groove structure, and the protruding structure cooperates with the groove structure. Alternatively, the first connection structure is a groove structure, in which case the corresponding position of the housing 110 is provided with a protruding structure. This application example does not limit the specific implementation of the first connection structure, as long as it can cooperate with the housing 110 to ensure a reliable connection between the circuit breaker 100 and the mounting box.

[0095] In this example, since the first end of the first rotating section is rotatably connected to the mounting housing, and the second end of the first rotating section is provided with a first connecting structure that can be connected to the housing 110 of the circuit breaker 100, a reliable connection between the circuit breaker 100 and the mounting housing can be ensured through the first rotating section. Similarly, since the first end of the second rotating section is rotatably connected to the mounting housing, and the second end of the second rotating section is provided with a first connecting structure that can be connected to the housing 110 of the circuit breaker 100, a reliable connection between the circuit breaker 100 and the mounting housing can be ensured through the second rotating section.

[0096] Based on the power distribution system provided in the above example, the fixed structure includes a connecting section and a first rotating section and a second rotating section arranged at intervals. Both the first rotating section and the second rotating section can be rotatably connected to the mounting box. The end of the first rotating section away from the rotation center is connected to the end of the second rotating section away from the rotation center through the connecting section. When the circuit breaker 100 cooperates with the mounting box, the connecting section can be connected to the side of the circuit breaker 100 away from the rotation center.

[0097] The first rotating section, the second rotating section, and the third rotating section work together to form a "ㄩ"-shaped structure. With the circuit breaker 100, the mounting box, and the fixing structure working together, the opening of the "ㄩ"-shaped structure is set towards the rotation center of the first rotating section.

[0098] At least a portion of the first rotating section and at least a portion of the second rotating section are located on opposite sides of the housing 110 to apply force to the housing 110 from different positions and directions, ensuring a reliable connection between the circuit breaker 100 and the mounting box. The connecting section may be located on the side of the housing 110 away from the rotation center.

[0099] In this example, both the first rotating section and the second rotating section are rotatably connected to the mounting housing, and the other ends of the first rotating section and the second rotating section are connected by a connecting section. When the circuit breaker 100 is in conjunction with the mounting housing, the connecting section can be connected to the side of the circuit breaker 100 away from the rotation center, applying a force towards the rotation center to the circuit breaker 100, thereby ensuring a reliable connection between the circuit breaker 100 and the mounting housing and improving the reliability of the connection between the circuit breaker 100 and the mounting housing.

[0100] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A circuit breaker, characterized in that, The circuit breaker is electrically connected to an external conductor via a connecting shaft. The circuit breaker includes: The housing has a first mounting hole in its housing wall; An internal conductive circuit is fixedly installed inside the housing. A connecting sleeve is fixedly installed to the housing, and the end of the connecting sleeve is electrically connected to the internal conductive circuit. The installation position of the connecting sleeve corresponds to the setting position of the first mounting hole. The connecting shaft can extend from the first mounting hole into the interior of the connecting sleeve and contact the surface of the connecting sleeve, so that the connecting sleeve and the connecting shaft are electrically connected.

2. The circuit breaker according to claim 1, characterized in that, The connecting sleeve has a second mounting hole inside, and the size of the second mounting hole gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve. The size of the connecting shaft gradually decreases along the direction in which the connecting shaft extends into the connecting sleeve, and the side wall of the connecting shaft contacts the wall surface of the second mounting hole.

3. The circuit breaker according to claim 1 or 2, characterized in that, The housing has an internal mounting cavity that communicates with the first mounting hole. The mounting cavity is used to mount the connecting sleeve. A limiting platform is provided at the connection between the mounting cavity and the first mounting hole. The connecting sleeve abuts against the limiting platform on the side facing the mounting cavity.

4. The circuit breaker according to claim 2, characterized in that, The second mounting hole has a first snap-fit ​​structure on its wall, and the connecting shaft has a second snap-fit ​​structure at the position corresponding to the first snap-fit ​​structure. The first snap-fit ​​structure snaps into the second snap-fit ​​structure.

5. The circuit breaker according to claim 4, characterized in that, The first snap-fit ​​structure is a snap-fit ​​protrusion, and the second snap-fit ​​structure is a snap-fit ​​groove, wherein the snap-fit ​​protrusion snaps into the snap-fit ​​groove; or... The first snap-fit ​​structure is a snap-fit ​​groove, and the second snap-fit ​​structure is a snap-fit ​​protrusion, wherein the snap-fit ​​protrusion snaps into the snap-fit ​​groove.

6. The circuit breaker according to claim 4, characterized in that, The first snap-fit ​​structure has a first guide surface on the side near the first mounting hole, and the inclination direction of the first guide surface is adapted to the snap-fit ​​direction of the second snap-fit ​​structure snapping into the first snap-fit ​​structure.

7. The circuit breaker according to claim 1 or 2, characterized in that, The internal conductive circuit includes a terminal block, one end of which is fixedly connected to the connecting sleeve.

8. A power distribution system, characterized in that, The device includes a mounting enclosure and a circuit breaker as described in any one of claims 1 to 7, wherein the connecting shaft is fixedly installed to the mounting enclosure.

9. The power distribution system according to claim 8, characterized in that, It also includes a fixing structure, which is rotatably mounted to the mounting housing. When the circuit breaker is engaged with the mounting housing, the end of the fixing structure away from the rotation center can rotate to a position connected to the housing of the circuit breaker.

10. The power distribution system according to claim 9, characterized in that, The fixing structure includes a first rotating segment and a second rotating segment spaced apart. The first end of the first rotating segment and the first end of the second rotating segment can be rotatably connected to the mounting housing. The second end of the first rotating segment has a first connecting structure facing the side of the second rotating segment. The first connecting structure can be connected to the side of the housing opposite to the first mounting hole. The second end of the second rotating segment has a second connecting structure facing the side of the first rotating segment. The second connecting structure can be connected to the side of the housing opposite to the first mounting hole.

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