Expansion bar and circuit breaker

Abstract

The utility model provides an extension bar and a circuit breaker, relates to the technical field of circuit breakers, and is used for improving the wiring efficiency of the extension bar and a wiring terminal on the basis of ensuring good conductivity of the extension bar and a wiring nose of external equipment. The extension bar is provided with a first connecting part and a second connecting part which are connected with each other, and the first connecting part is used for being electrically connected with a wiring terminal of the circuit breaker. The expansion row is of a plate-shaped structure, and in the direction perpendicular to the direction from the first connecting part to the second connecting part, the size of the second connecting part is larger than that of the first connecting part.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, specifically to an extension bar and a circuit breaker. Background Technology

[0002] With the development of new energy sources such as photovoltaics, the requirements for voltage are increasing. Raising the rated voltage of the power supply system helps reduce transmission losses and equipment costs. Correspondingly, the rated voltage of switching devices used in conjunction with the power supply system, such as circuit breakers, also needs to be increased.

[0003] In existing technologies, the number of circuit breakers is generally increased by external cascading, which often provides multiple breaking points through multiple cascaded contacts in order to increase the rated voltage of the circuit breaker.

[0004] Currently, when wiring circuit breakers, expansion strips are generally used to electrically connect the circuit breaker's terminals to external wiring lugs. Specifically, one end of the expansion strip needs to be inserted into the circuit breaker housing. However, to ensure good conductivity between the expansion strip and the wiring lugs of external devices, the width of the expansion strip is generally set too wide, making it difficult to insert the expansion strip into the housing when connecting it to the terminals. Utility Model Content

[0005] This application provides an expansion bus and a circuit breaker to improve the efficiency of wiring between the expansion bus and the terminal block while ensuring good conductivity between the expansion bus and the wiring lugs of external equipment.

[0006] To achieve the above objectives, in a first aspect, this application provides an expansion bar having a first connecting portion and a second connecting portion interconnected, the first connecting portion being used for electrical connection with the terminals of a circuit breaker. The expansion bar has a plate-like structure, and in a direction perpendicular to the direction from the first connecting portion to the second connecting portion, the size of the second connecting portion is larger than the size of the first connecting portion.

[0007] When the above technical solution is adopted, when connecting the expansion bar to the terminal block, it is convenient to insert one end of the first connection part into the first mounting groove or the second mounting groove of the housing, so as to avoid the phenomenon of interference between the expansion bar and the housing when connecting the expansion bar and the terminal block, and improve the efficiency of connecting the expansion bar and the terminal block.

[0008] Furthermore, the second connection portion has a larger dimension in the direction perpendicular to the direction from the first connection portion to the second connection portion, which ensures the contact area between the second connection portion and the wiring lug of the external device, improves the stability of the connection between the extension strip and the wiring lug of the external device, and reduces contact resistance.

[0009] In one possible implementation, the size of the second connecting portion is smaller than the size of the first connecting portion in the thickness direction of the extended row.

[0010] When adopting the above technical solution, on the one hand, it can reduce the amount of material used in the extended row, reduce the demand for raw materials, improve the efficiency of resource utilization, and help reduce costs.

[0011] On the other hand, a step can be formed at the connection position of the first and second connecting parts. When the wiring lug of the external device is connected and installed to the second connecting part, the step can position the wiring lug of the external device to facilitate the alignment and matching of the wiring lug with the extension bar, which helps with the installation of the wiring lug.

[0012] In one possible implementation, the first connecting portion has a first perpendicular surface in the thickness direction. The second connecting portion has a second perpendicular surface in the thickness direction, and the first and second perpendicular surfaces are coplanar.

[0013] When using the above technical solution, steps can be formed on both surfaces of the expansion bar. During actual installation, when the wiring lug contacts either surface of the expansion bar, the step can be used as a positioning point for positioning, facilitating the alignment and matching of the wiring lug with the expansion bar, and aiding in the installation of the wiring lug.

[0014] In one possible implementation, one side of the first connecting portion is coplanar with one side of the second connecting portion in the thickness direction of the extended row.

[0015] The above technical solutions enrich the structural diversity of extended rows, expand their applicable scope, and facilitate selection based on actual conditions.

[0016] Meanwhile, the fact that one side of the first connecting part is coplanar with one side of the second connecting part makes the connection between the first and second connecting parts more stable. Furthermore, during the manufacturing process of the extended strip, the coplanarity of one side of the first connecting part with one side of the second connecting part facilitates alignment processing.

[0017] In one possible implementation, the extended row is an L-shaped structure.

[0018] When using the above technical solution, when using two L-shaped expansion bars to connect two adjacent terminals respectively, the two L-shaped expansion bars can be symmetrically arranged to make reasonable use of space and increase the installation distance between the two terminal lugs connected to the two L-shaped expansion bars.

[0019] In one possible implementation, a first connecting hole is provided on the first connecting part.

[0020] When the above technical solution is adopted, the first connecting part and the circuit breaker terminal can be connected by fasteners such as screws. This connection method is not only simple and quick, but also provides a stable connection effect, ensuring the firmness of the connection between the first connecting part and the terminal.

[0021] In one possible implementation, a second connecting hole is provided on the second connecting part.

[0022] When the above technical solution is adopted, the second connecting part and the wiring lug of the external device can be connected by fasteners such as screws. This connection method is not only simple and quick, but also provides a stable connection effect, ensuring the firmness of the connection between the second connecting part and the wiring lug.

[0023] In one possible implementation, the line connecting the first connecting hole and the second connecting hole has an acute angle with the direction from the first connecting portion to the second connecting portion.

[0024] When using the above technical solution, when using two expansion bars to connect two adjacent terminals respectively, the two expansion bars can be arranged symmetrically to increase the installation distance between the two terminal lugs connected to the two expansion bars.

[0025] Secondly, this application provides a circuit breaker including a housing, at least two sets of parallel-arranged circuits, and at least one extension bar as described in any possible implementation of the first aspect, wherein the circuits are disposed within the housing. Each circuit has a terminal block. A first connection portion of one extension bar is electrically connected to a terminal block, and a second connection portion of the extension bar is located outside the housing.

[0026] The beneficial effects of the circuit breaker described in the second aspect can be referred to the beneficial effects of the expansion bar described in the first aspect, and will not be repeated here.

[0027] In one possible implementation, the extension bar for connection to the terminal block near the side of the housing has an angle α between the direction of the first connection portion to the second connection portion and the length direction of the housing, where 0°≤α≤90°.

[0028] When adopting the above technical solution, the distance between the second connecting parts of two adjacent expansion bars can be adjusted according to actual needs. This provides sufficient installation space for the wiring lugs of external devices electrically connected to the second connecting parts, facilitates the connection between the wiring lugs and the expansion bars, avoids interference, and makes installation and operation convenient. At the same time, it expands the applicable range of the circuit breaker, making it easier to select and install according to actual conditions. Attached Figure Description

[0029] Figure 1 Schematic diagram of the circuit breaker provided in the embodiments of this application Figure 1 .

[0030] Figure 2 This is a cross-sectional schematic diagram of a circuit breaker provided in an embodiment of this application.

[0031] Figure 3 Schematic diagram of the circuit breaker provided in the embodiments of this application Figure 2 .

[0032] Figure 4 Schematic diagram of the extended row provided in the embodiments of this application Figure 1 .

[0033] Figure 5 Schematic diagram of the extended row provided in the embodiments of this application Figure 2 .

[0034] Figure 6 This is a side view of an example extended row provided in an embodiment of this application.

[0035] Figure 7 A side view of an extended row, which is another example provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1-Extension row, 11-First connecting part, 111-First connecting hole, 12-Second connecting part, 121-Second connecting hole;

[0038] 101 - First extended row, 102 - Second extended row, 103 - Third extended row;

[0039] 2-Housing, 21-Allowing groove, 31-Stationary contact, 32-Moving contact, 33-Connecting bar. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort 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 one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] 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.

[0045] 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).

[0046] First, please refer to Figures 1 to 3 As shown, this application provides a circuit breaker, which includes a housing 2, at least two sets of parallel-arranged circuits, and at least one such circuit breaker. Figures 4 to 7 The expansion bar 1 shown has a passageway located in the housing 2. The passageway has a terminal block. A first connection portion 11 of the expansion bar 1 is electrically connected to a terminal block, and a second connection portion 12 of the expansion bar 1 is located outside the housing 2.

[0047] In practice, the shell 2 can be made of plastic, but it is not limited to this and the actual situation shall prevail.

[0048] The shell 2 can be a cuboid structure, and the shell 2 has an accommodating space. The passage is installed on the shell 2 and is located within the accommodating space.

[0049] The housing 2 can accommodate and contain the passageways, providing them with a stable space to ensure their normal operation without external interference. Simultaneously, the housing 2 provides positioning and support for the passageways, preventing displacement or damage during operation. The housing 2 can also withstand a certain amount of external pressure, protecting the passageways from damage. Furthermore, the housing 2 provides protection, preventing moisture, dust, dirt, and other impurities from entering the housing 2, thereby avoiding corrosion or damage to the passageways installed inside.

[0050] In reality, such as Figure 2 As shown, the passage generally includes a stationary contact 31, a moving contact 32, and a connecting block 33. Under normal circumstances, the stationary contact 31 and the connecting block 33 can be fixedly mounted on the housing 2, while the moving contact 32 is rotatably mounted on the housing 2.

[0051] When the moving contact 32 rotates relative to the housing 2 and contacts the stationary contact 31, the stationary contact 31, the moving contact 32, and the connecting block 33 are electrically connected. Specifically, the two ends of the moving contact 32 are electrically connected to the stationary contact 31 and the connecting block 33, respectively, and the circuit current of the circuit breaker is conducted.

[0052] When the moving contact 32 rotates relative to the housing 2 and the moving contact 32 disengages from the stationary contact 31, the current in the circuit where the circuit breaker is located is interrupted.

[0053] In practice, the number of pathways can be two, three or more, and no specific limit is set here.

[0054] It should be noted that when there are two circuits, the circuit breaker is a two-pole circuit breaker. Correspondingly, when there are three circuits, the circuit breaker is a three-pole circuit breaker.

[0055] In practice, the wiring terminals include incoming wiring terminals and outgoing wiring terminals. That is, each path includes both incoming and outgoing wiring terminals.

[0056] One expansion bus 1 corresponds to one incoming terminal or one outgoing terminal, that is, one expansion bus 1 is electrically connected to one incoming terminal or one outgoing terminal.

[0057] An extension bar 1 can be installed at both the incoming and outgoing terminals of a passage. Alternatively, an extension bar 1 can be installed only at either the incoming or outgoing terminal of a passage. The specific situation is not limited here and should be determined by the actual situation.

[0058] The terminal block of the circuit can be the end of the stationary contact 31 that is furthest from the moving contact 32. In the embodiment provided in this application, the end of the stationary contact 31 that is furthest from the moving contact 32 is the incoming terminal block.

[0059] Specifically, a first mounting groove can be formed on the housing 2 to accommodate the end of the stationary contact 31 that is away from the moving contact 32. In actual operation, when the incoming terminal is connected to the expansion bus 1, one end of the first connecting part 11 of the expansion bus 1 is inserted into the first mounting groove so that the first connecting part 11 can be electrically connected to the end of the stationary contact 31 that is away from the moving contact 32.

[0060] Alternatively, the terminal block of the passage can be the end of the connecting bar 33 furthest from the moving contact 32. Furthermore, in the embodiment provided in this application, the end of the connecting bar 33 furthest from the moving contact 32 is the outgoing terminal block.

[0061] Specifically, a second mounting groove can be formed on the housing 2 to accommodate the end of the connecting bar 33 that is away from the moving contact 32. In actual operation, when connecting the outgoing terminal to the extension bar 1, one end of the first connecting part 11 of the extension bar 1 is inserted into the second mounting groove so that the first connecting part 11 can be electrically connected to the end of the connecting bar 33 that is away from the moving contact 32.

[0062] Additionally, it should be noted that the first and second mounting slots on the housing 2 can be rectangular parallelepiped structures.

[0063] The second connection portion 12 of the extension row 1 is located outside the housing 2 so that the wiring lug of the external device can be electrically connected to the second connection portion 12.

[0064] In one possible implementation, combining Figure 1 and Figure 3 As shown, the extension bar 1, which is used to connect to the wiring terminals near the side of the housing 2, has a first connecting part 11 to a second connecting part 12 with an angle α between the direction of the first connecting part 11 and the length direction of the housing 2, where 0°≤α≤90°.

[0065] It should be noted that shell 2 is generally a cuboid structure. The length direction of shell 2 refers to the direction parallel to its long side. Figure 1 Taking the circuit breaker placement shown as an example, the length direction of the housing 2 is parallel to the vertical direction.

[0066] The side of the shell 2 refers to the surface perpendicular to the surface where the extended row 1 of the plate structure is located.

[0067] For example, when the circuit breaker includes two incoming terminals, both incoming terminals are located near the side of the housing 2.

[0068] When the circuit breaker includes three terminals, the two terminals located on both sides are the terminals closest to the side of the housing 2.

[0069] Specifically, such as Figure 1and Figure 3 As shown, the circuit breaker includes three incoming terminals and three outgoing terminals, with one incoming terminal corresponding to one outgoing terminal. Figure 1 and Figure 3 The circuit breaker shown has three circuits, namely Figure 1 and Figure 3 The circuit breaker shown is a three-pole circuit breaker.

[0070] In addition, combined Figures 1 to 3 As shown, an extension bar is installed at each of the three outgoing terminal blocks.

[0071] For ease of description, the following will be... Figure 1 and Figure 3 The three extended rows shown are defined as the first extended row 101, the second extended row 102, and the third extended row 103, respectively.

[0072] The second extension row 102 is located between the first extension row 101 and the third extension row 103. The first extension row 101 and the third extension row 103 are extension rows connected to the wiring terminals near the side of the housing 2.

[0073] like Figure 1 and Figure 3 As shown, the direction from the first connecting portion 11 to the second connecting portion 12 of the first extension row 101 is parallel to the length direction of the housing 2. That is, the angle between the direction from the first connecting portion 11 to the second connecting portion 12 of the first extension row 101 and the length direction of the housing 2 is 0°.

[0074] The direction of the first connecting portion 11 to the second connecting portion 12 of the third extension row 103 is perpendicular to the length direction of the housing 2. That is, the angle between the direction of the first connecting portion 11 to the second connecting portion 12 of the third extension row 103 and the length direction of the housing 2 is 90°.

[0075] For example, α can be 0°, 15°, 30°, 45°, 50°, 60°, 75°, 80°, 90°, etc. This is just an example and is not intended as a specific limitation.

[0076] In this way, the distance between the second connecting parts 12 of two adjacent expansion bars 1 can be adjusted according to actual needs, so as to provide sufficient installation space for the wiring lugs of external devices that are electrically connected to the second connecting parts 12, which is conducive to the connection between the wiring lugs and the expansion bars 1, avoids interference, and makes installation and operation convenient.

[0077] At the same time, it expands the scope of application of circuit breakers, making it easier to select and install them according to actual conditions.

[0078] It should be noted that when the direction of the first connecting portion 11 to the second connecting portion 12 of the extension bar 1 used for connection to the terminal block near the side of the housing 2 has an angle α greater than 0° with the length direction of the housing 2, in order to allow the second connecting portion 12 to extend outside the housing 2, a clearance groove 21 can be provided on the housing 2 at a corresponding position, such as... Figure 3 As shown.

[0079] Please refer to Figure 4 This application provides an extended row 1, which has a first connecting part 11 and a second connecting part 12 that are interconnected.

[0080] The material of extension row 1 can be conductive metals such as copper, aluminum, and iron. Of course, it is not limited to these in practice. This is just an example and is not intended to be a specific limitation.

[0081] The first connecting part 11 and the second connecting part 12 can be integrally formed. Of course, the first connecting part 11 and the second connecting part 12 can also be connected together by welding, riveting, snap-fitting or other methods to form an integral structure of the extended row 1.

[0082] The first connecting part 11 is used for electrical connection with the wiring terminals of the circuit breaker. The connection method between the first connecting part 11 and the wiring terminals of the circuit breaker is not specifically limited here. For example, the first connecting part 11 can be electrically connected to the wiring terminals of the circuit breaker by welding, riveting, snap-fitting, etc. Of course, it is not limited to these methods in practice.

[0083] In practice, the second connecting part 12 is electrically connected to the wiring lug of the external device. Similarly, the connection method between the second connecting part 12 and the wiring lug of the external device is not specifically limited here. For example, the second connecting part 12 can be electrically connected to the wiring lug of the external device by welding, riveting, snap-fitting, etc., but of course, it is not limited to these methods.

[0084] Combination Figures 4 to 7 As shown, the extension row 1 has a plate-like structure. In the direction perpendicular to the direction from the first connecting part 11 to the second connecting part 12, the size of the second connecting part 12 is larger than the size of the first connecting part 11.

[0085] It should be noted that, in the embodiments provided in this application, the direction perpendicular to the direction of the first connecting part 11 to the second connecting part 12 refers to the width direction of the extension row 1.

[0086] Specifically, such as Figure 5 As shown, the dimension of the first connecting portion 11 in the direction perpendicular to the direction from the first connecting portion 11 to the second connecting portion 12 is defined as D1. Simultaneously, the dimension of the second connecting portion 12 in the direction perpendicular to the direction from the first connecting portion 11 to the second connecting portion 12 is defined as D2.

[0087] In the embodiments provided in this application, D2 > D1.

[0088] When adopting the above technical solution, the dimension D1 of the first connecting part 11 in the direction perpendicular to the direction from the first connecting part 11 to the second connecting part 12 can be matched and designed according to the specific dimensions of the first mounting groove and the second mounting groove on the housing 2. In this way, when wiring the expansion strip 1 to the terminal block, it is convenient for one end of the first connecting part 11 to be inserted into the first mounting groove or the second mounting groove of the housing 2, avoiding interference between the expansion strip 1 and the housing 2 when connecting the expansion strip 1 to the terminal block. This application can improve the efficiency of wiring the expansion strip 1 to the terminal block.

[0089] Furthermore, the second connecting portion 12 has a larger dimension in the direction perpendicular to the direction from the first connecting portion 11 to the second connecting portion 12, which can ensure the contact area between the second connecting portion 12 and the wiring lug of the external device, improve the stability of the connection between the extension bus 1 and the wiring lug of the external device, and reduce the contact resistance.

[0090] In practice, the specific values ​​of D1 and D2 are not specifically limited here, and should be based on the actual situation.

[0091] Furthermore, the dimensions of the first connecting portion 11 and the second connecting portion 12 in the direction from the first connecting portion 11 to the second connecting portion 12 are not limited here, but shall be subject to the actual situation.

[0092] In some embodiments, such as Figure 6 and Figure 7 As shown, in the thickness direction of the extension row 1, the size of the second connecting part 12 is smaller than the size of the first connecting part 11.

[0093] In this way, on the one hand, the amount of materials used in the extended row 1 can be reduced, the demand for raw materials can be reduced, the efficiency of resource utilization can be improved, and the cost can be reduced.

[0094] On the other hand, since the dimensions of the first connecting portion 11 and the second connecting portion 12 are different in the thickness direction of the extended row 1, and the dimension of the second connecting portion 12 is smaller than the dimension of the first connecting portion 11, combined with Figures 4 to 7 It can be seen that a step can be formed at the connection position of the first connecting part 11 and the second connecting part 12. When the wiring lug of the external device is connected and installed to the second connecting part 12, the step can position the wiring lug of the external device to facilitate the alignment and matching of the wiring lug with the extension bar 1, which helps in the installation of the wiring lug.

[0095] In the thickness direction of the extension row 1, the dimensions of the first connecting part 11 and the second connecting part 12 are subject to the actual situation and are not specifically limited here.

[0096] Additionally, it should be noted that the thickness direction of extended row 1 can be understood as the direction from one surface of extended row 1 to another.

[0097] In one example, such as Figure 6 As shown, the first connecting portion 11 has a first perpendicular surface in the thickness direction. The second connecting portion 12 has a second perpendicular surface in the thickness direction, and the first and second perpendicular surfaces are coplanar.

[0098] It should be noted that the first perpendicular surface is perpendicular to the thickness direction of the first connecting part 11, the first perpendicular surface is parallel to the two surfaces of the first connecting part 11, and the distance between the first perpendicular surface and the two surfaces of the first connecting part 11 is equal.

[0099] The surface of the first connecting portion 11 refers to the surface perpendicular to the thickness direction of the first connecting portion 11. In a specific implementation, one surface of the first connecting portion 11 is in contact with the wiring terminals of the circuit breaker.

[0100] Correspondingly, the second perpendicular surface is perpendicular to the thickness direction of the second connecting portion 12, the second perpendicular surface is parallel to the two surfaces of the second connecting portion 12, and the distance between the second perpendicular surface and the two surfaces of the second connecting portion 12 is equal.

[0101] The surface of the second connecting portion 12 refers to the surface perpendicular to the thickness direction of the second connecting portion 12. In a specific implementation, one surface of the second connecting portion 12 contacts the wiring lug of an external device.

[0102] Thus, steps can be formed on both surfaces of expansion bar 1. During actual installation, when the wiring lug contacts either surface of expansion bar 1, the step can be used as a positioning point for positioning, facilitating the alignment and matching of the wiring lug with expansion bar 1, and aiding in the installation of the wiring lug.

[0103] In another example, such as Figure 7 As shown, in the thickness direction of the extension row 1, one side of the first connecting part 11 is coplanar with one side of the second connecting part 12.

[0104] This enriches the structural diversity of Extended Arrangement 1, expands its applicability, and facilitates selection based on actual circumstances.

[0105] Meanwhile, one side of the first connecting part 11 is coplanar with one side of the second connecting part 12, making the connection between the first connecting part 11 and the second connecting part 12 more stable. Furthermore, during the manufacturing process of the extension row 1, the coplanarity of one side of the first connecting part 11 and one side of the second connecting part 12 facilitates alignment processing.

[0106] In some embodiments, extended row 1 has an L-shaped structure, such as... Figure 4 and Figure 5 As shown.

[0107] Thus, combined Figure 1 and Figure 3 When using two L-shaped expansion bars 1 to connect two adjacent terminals, the two L-shaped expansion bars 1 can be arranged symmetrically to make reasonable use of space and increase the installation distance between the two terminal lugs connected to the two L-shaped expansion bars 1.

[0108] In one alternative embodiment, the first connecting portion 11 is provided with a first connecting hole 111.

[0109] Thus, the first connecting part 11 and the circuit breaker terminal can be connected by fasteners such as screws. This connection method is not only simple and quick, but also provides a stable connection effect, ensuring the firmness of the connection between the first connecting part 11 and the terminal.

[0110] In practice, the screw has a shank and a nut. During installation, the end of the shank away from the nut can pass through the first connecting part 11 and the terminal in sequence, and then be threaded onto the housing 2, thereby fixing the terminal and the first connecting part 11 onto the housing 2.

[0111] In another alternative, a second connecting hole 121 is provided on the second connecting part 12.

[0112] Thus, the second connecting part 12 can be connected to the wiring lug of the external device by fasteners such as screws. This connection method is not only simple and quick, but also provides a stable connection effect, ensuring the firmness of the connection between the second connecting part 12 and the wiring lug.

[0113] Furthermore, the line connecting the first connecting hole 111 and the second connecting hole 121 has an acute angle with the direction from the first connecting portion 11 to the second connecting portion 12.

[0114] In this case, when using two extension strips 1 to connect two adjacent terminals respectively, the two extension strips 1 can be arranged symmetrically to increase the installation spacing between the two terminal lugs connected to the two extension strips 1.

[0115] like Figure 1 and Figure 3As shown, when the expansion bar 1 has an L-shaped structure, and the expansion bar 1 is provided with a first connecting hole 111 and a second connecting hole 121, when two L-shaped expansion bars 1 are used to connect two adjacent terminals respectively, the two L-shaped expansion bars 1 are symmetrically arranged, which not only makes reasonable use of space, but also the distance between the second connecting holes 121 on the two expansion bars 1 is large, which can increase the installation spacing between the two terminal lugs connected to the two L-shaped expansion bars 1.

[0116] 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 according to the specific circumstances.

Claims

1. An extended row, characterized in that, It has a first connecting part and a second connecting part that are interconnected; the first connecting part is used for electrical connection with the terminal block of the circuit breaker; the extension bar has a plate-like structure, and in a direction perpendicular to the direction from the first connecting part to the second connecting part, the size of the second connecting part is larger than the size of the first connecting part.

2. The extended row according to claim 1, characterized in that, In the thickness direction of the extended row, the size of the second connecting portion is smaller than the size of the first connecting portion.

3. The extended row according to claim 2, characterized in that, In the thickness direction of the first connecting portion, the first connecting portion has a first perpendicular surface; in the thickness direction of the second connecting portion, the second connecting portion has a second perpendicular surface, and the first perpendicular surface and the second perpendicular surface are coplanar.

4. The extended row according to claim 2, characterized in that, In the thickness direction of the extended row, one side of the first connecting portion is coplanar with one side of the second connecting portion.

5. The extended row according to claim 1, characterized in that, The extended row has an L-shaped structure.

6. The extended row according to claim 1, characterized in that, The first connecting part is provided with a first connecting hole.

7. The extended row according to claim 6, characterized in that, The second connecting part is provided with a second connecting hole.

8. The extended row according to claim 7, characterized in that, The line connecting the first connecting hole and the second connecting hole forms an acute angle with the direction from the first connecting portion to the second connecting portion.

9. A circuit breaker, characterized in that, include: case; At least two sets of parallel passages are provided in the housing; each passage has a terminal block. At least one expansion bar as described in any one of claims 1 to 8, wherein a first connection portion of the expansion bar is electrically connected to one of the terminals, and a second connection portion of the expansion bar is located outside the housing.

10. The circuit breaker according to claim 9, characterized in that, The extension bar for connection to the terminal block near the side of the housing has an angle α between the direction of the first connection portion to the second connection portion and the length direction of the housing, where 0°≤α≤90°.

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