Circuit breaker device

Abstract

The utility model provides a circuit breaker device, and belongs to the technical field of electrical equipment. The utility model provides a circuit breaker device. The circuit breaker device comprises a circuit breaker body and a shunt release. The circuit breaker body comprises a first shell and a contact support, the contact support is arranged in the first shell, the first shell is provided with a boss in the width direction of the circuit breaker body, and the boss is close to the contact support. The shunt release is arranged on one side of the first shell along the width direction of the circuit breaker body, and the shunt release is arranged on the boss. The shunt release is arranged on one side along the width direction of the circuit breaker body, so that the occupation of the installation space in the distribution box in the thickness direction of the circuit breaker body when the circuit breaker device is installed in the distribution box can be reduced. Therefore, the number of circuit breaker devices arranged in the distribution box can be increased, and the number of distribution loops in the distribution box can be increased.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a circuit breaker device. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. A circuit breaker consists of the circuit breaker body and the shunt trip unit. In practical use, circuit breaker devices need to be installed in distribution boxes, and multiple circuit breaker devices can be installed in one distribution box.

[0003] In the prior art, when circuit breaker devices are installed in distribution boxes, the circuit breaker devices will occupy too much of the effective installation space in the distribution box, which will reduce the number of circuit breaker devices installed in the distribution box, thereby reducing the number of power distribution circuits in the distribution box. Utility Model Content

[0004] This application provides a circuit breaker device to save the space required for installation of circuit breaker devices in a distribution box, thereby increasing the number of circuit breaker devices installed in the distribution box and thus increasing the number of power distribution circuits in the distribution box.

[0005] In a first aspect, this application provides a circuit breaker device, comprising: a circuit breaker body and a shunt trip unit. The circuit breaker body includes a first housing and a contact support, the contact support being disposed within the first housing. The first housing has a boss in the width direction of the circuit breaker body, the boss being close to the contact support. The shunt trip unit is disposed on one side of the first housing along the width direction of the circuit breaker body, the shunt trip unit being disposed on the boss.

[0006] With the above-described solution, the shunt trip unit of this application is located on one side along the width direction of the circuit breaker body, which saves space occupied in the distribution box along the thickness direction of the circuit breaker body when installing the circuit breaker device inside the distribution box. This allows for an increase in the number of circuit breaker devices installed in the distribution box, thereby increasing the number of distribution circuits within the distribution box. The shunt trip unit is located on a protrusion inherent to the circuit breaker body, which not only supports the shunt trip unit but also effectively utilizes the space above the protrusion, further saving space occupied by the circuit breaker device in the width direction of the circuit breaker body within the distribution box.

[0007] In one possible design, the shunt trip unit includes a second housing, which is L-shaped. The second housing includes a first sidewall, a second sidewall, and a third sidewall connected in sequence. The second sidewall is perpendicular to the first sidewall and the third sidewall. The first sidewall contacts the side of the first housing facing the first sidewall, the second sidewall contacts the surface of the boss, and the third sidewall contacts the side of the first housing facing the third sidewall.

[0008] Through the above scheme, the L-shaped design of the second housing allows for the formation of a notch to accommodate the boss, enabling the boss to support the shunt trip unit through the fit between the boss and the notch. One end of the second sidewall is perpendicular to the first sidewall, and the other end is perpendicular to the third sidewall, creating a stepped structure where the first, second, and third sidewalls can simultaneously abut against the first housing. When the boss supports the shunt trip unit, the space above the boss is maximized, allowing the shunt trip unit to be positioned closer to the boss. This further saves space occupied by the circuit breaker installation within the distribution box along the width of the circuit breaker body.

[0009] In one possible design, the first housing has a positioning hole on the side facing the first sidewall, and the first sidewall has a positioning rod. The positioning rod is positioned facing the first housing and is located within the positioning hole.

[0010] With the above solution, because the shunt trip unit has an irregular shape, a positioning hole is set on the first housing and a positioning rod is set on the first side wall. The positioning hole and the positioning rod cooperate to guide the installation of the shunt trip unit, thereby simplifying the installation process and making the installation of the shunt trip unit more convenient.

[0011] In one possible design, the positioning hole is square, and the positioning rod is square-prism shaped. The wall of the positioning hole abuts against the wall of the positioning rod.

[0012] With the above solution, when the positioning rod is located inside the positioning hole, the hole wall can limit the side wall of the positioning rod, thus limiting the shunt trip unit in both the thickness and height directions of the circuit breaker body. Furthermore, when the positioning hole is square and the positioning rod is prismatic, the possibility of the shunt trip unit rotating around the positioning rod as an axis is reduced, improving the stability of the shunt trip unit installation.

[0013] In one possible design, the first housing has a limiting hole on the side facing the third sidewall, and the third sidewall has a hook. The hook faces the first housing and includes a connected hook handle and a hook bend. The hook handle is located within the limiting hole, and the hook bend hooks with the inner wall of the first housing.

[0014] By using the above solution, a limiting hole is provided on the first housing and a hook is provided on the third side wall. The hook passes through the limiting hole and hooks with the inner wall of the first housing, which can limit the shunt trip unit in the width direction of the circuit breaker body, reducing the possibility of the shunt trip unit falling off the boss and improving the installation stability of the shunt trip unit.

[0015] In one possible design, the surface of the boss has mounting holes. The second sidewall has clearance holes, which are positioned opposite to the mounting holes.

[0016] With the above solution, mounting holes can be provided on the surface of the boss due to actual installation requirements. A clearance hole is provided on the second sidewall to allow for clearance between the mounting holes. When the shunt trip unit is mounted on the boss, the second sidewall can contact the surface of the boss. This eliminates the need to raise the installation height of the shunt trip unit to allow clearance for the mounting holes. Furthermore, the contact between the second sidewall and the surface of the boss allows the shunt trip unit to be placed comfortably on the boss surface, thereby increasing the installation stability of the shunt trip unit.

[0017] In one possible design, the surface of the boss has a protrusion that surrounds the mounting hole. The protrusion contacts the wall of the clearance hole.

[0018] With the above scheme, a protrusion is provided around the mounting hole, and the protrusion contacts the wall of the clearance hole. The protrusion and the clearance hole can be used to limit the shunt trip in the width and thickness directions of the circuit breaker body, so that the installation of the shunt trip can be more stable.

[0019] In one possible design, the shunt trip unit is equipped with a tripping mechanism. The tripping mechanism is linked to the contacts.

[0020] The above scheme involves setting a tripping mechanism inside the shunt trip unit and linking the tripping mechanism with the contact support inside the circuit breaker body. When the shunt trip unit receives an external signal, the tripping mechanism can drive the contact support to rotate, thereby controlling the circuit breaker body to perform a tripping operation.

[0021] In one possible design, the circuit breaker body also includes a latch and a support, and the shunt trip unit includes a drive rod, a connecting rod, and a spring. The latch cooperates with the drive rod to enable the shunt trip unit to drive the circuit breaker body to open. The support, connecting rod, and spring work together to de-energize the shunt trip unit when the circuit breaker body is in the open state.

[0022] Through the above-described scheme, this application incorporates a latch within the circuit breaker body and a drive rod within the shunt trip unit. The drive rod, in conjunction with the latch, enables linkage between the tripping mechanism and the contact support. Furthermore, a support component is incorporated within the circuit breaker body, and a connecting rod and a spring are installed within the shunt trip unit. The cooperation of these three components ensures that the shunt trip unit is de-energized when the circuit breaker body is in the open state, thus improving the reliability of the shunt trip unit.

[0023] In one possible design, the shunt trip also includes a coil, an armature, and an iron core. The armature is inserted into the coil, and one end of the armature is linked to the drive rod. The iron core is located inside the coil, and is positioned on the side of the armature furthest from the drive rod.

[0024] The above scheme involves placing an iron core inside the coil, positioned on the side of the armature furthest from the drive rod. When the coil is energized, the iron core becomes magnetized, attracting the armature. This allows the armature to generate a greater force when moving, driving the drive rod to rotate. The increased force on the drive rod results in a greater force on the latch, making it easier for the contact support to rotate and ensuring the circuit breaker's tripping effect. Therefore, the iron core configuration improves the reliability of the shunt trip unit. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a shunt trip unit installed on the circuit breaker body, as provided in an embodiment of this application.

[0026] Figure 2 This is a schematic diagram of the overall structure of the circuit breaker body provided in the embodiments of this application.

[0027] Figure 3 This is a schematic diagram of the shunt trip unit provided in an embodiment of this application from one perspective.

[0028] Figure 4 This is a schematic diagram of the internal structure of the circuit breaker body provided in an embodiment of this application.

[0029] Figure 5 This is a schematic diagram of the shunt trip unit provided in an embodiment of this application from another perspective.

[0030] Figure 6 This is a schematic diagram of the linkage between the tripping mechanism and the contact support provided in the embodiments of this application.

[0031] Figure 7 This is a schematic diagram of the internal structure of the shunt trip unit provided in the embodiments of this application from one perspective.

[0032] Figure 8This is a schematic diagram of the internal structure of the shunt trip unit provided in the embodiments of this application from another perspective.

[0033] Figure 9 for Figure 7 A schematic diagram of the structure of the shunt trip unit after the coil is removed.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Circuit breaker body; 110. First housing; 111. Positioning hole; 112. Limiting hole; 120. Boss; 121. Mounting hole; 122. Protrusion; 130. Contact support; 140. Locking latch; 150. Support component;

[0036] 200. Shunt trip unit; 210. Second housing; 211. First side wall; 212. Second side wall; 213. Third side wall; 214. Outlet terminal of shunt trip unit; 215. Inlet terminal of shunt trip unit; 220. Positioning rod; 230. Hook; 240. Clearance hole; 250. Drive rod; 260. Linkage rod; 261. Spring; 262. Silver dot; 270. Coil; 280. Armature; 290. Iron core. Detailed Implementation

[0037] 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.

[0038] 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 belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0039] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other terms. The words "a" or "an" do not exclude the presence of multiple terms.

[0040] 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.

[0041] 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 represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0042] 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, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used 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.

[0043] 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.

[0044] In the description of this application, it should be noted that, unless otherwise expressly 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. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; 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.

[0045] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. The circuit breaker body can be a small-volume circuit breaker, which has advantages such as compact structure and ease of installation. The circuit breaker device includes the circuit breaker body and a shunt trip unit. The shunt trip unit solves the problem that the circuit breaker body only has manual operation for closing and opening, and cannot be controlled by external signals.

[0046] In the prior art, circuit breaker devices are typically installed in distribution boxes. Distribution boxes usually have a metal casing. When circuit breaker devices are installed inside distribution boxes, the risk of electric shock to personnel can be reduced. At the same time, distribution boxes can also reduce damage to the circuit breaker devices from the external environment, such as dust and moisture.

[0047] When circuit breaker devices are installed in a distribution box, they are usually arranged along the thickness of the circuit breaker body. The installation of shunt trip units along the thickness of the circuit breaker body will undoubtedly occupy the available installation space within the distribution box, thus reducing the number of circuit breaker devices and consequently the number of power distribution circuits in the distribution box.

[0048] To address the aforementioned problems, this application provides a circuit breaker device. To enable those skilled in the art to better understand the solution of this application, the circuit breaker device mentioned in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0049] Figure 1 This is a schematic diagram of a shunt trip unit installed on the circuit breaker body, as provided in an embodiment of this application. Figure 2 This is a schematic diagram of the overall structure of the circuit breaker body provided in the embodiments of this application. Figure 3 This is a schematic diagram of the shunt trip unit provided in an embodiment of this application from one perspective. Figure 4 This is a schematic diagram of the internal structure of the circuit breaker body provided in an embodiment of this application. Figures 1 to 4 As shown, this application provides a circuit breaker device, which includes a circuit breaker body 100 and a shunt trip unit 200. The circuit breaker body 100 includes a first housing 110 and a contact support 130, the contact support 130 being disposed within the first housing 110. The first housing 110 has a boss 120 in the width direction of the circuit breaker body 100, the boss 120 being close to the contact support 130. The shunt trip unit 200 is disposed on one side of the first housing 110 along the width direction of the circuit breaker body 100, and the shunt trip unit 200 is disposed on the boss 120.

[0050] The first housing 110 includes a top cover and a base. When the top cover and the base are closed, they form a receiving cavity, in which the contact support 130 can be rotatably disposed. The direction in which the top cover and the base are closed can be the thickness direction of the circuit breaker body 100. The circuit breaker body 100 also includes an inlet terminal and an outlet terminal, which can be arranged in the width direction of the circuit breaker body 100.

[0051] The first housing 110 may have two bosses 120 in the width direction of the circuit breaker body 100. The two bosses 120 may be symmetrically arranged, with one boss 120 close to the contact support 130 of the circuit breaker body 100 and the other boss 120 away from the contact support 130 of the circuit breaker body 100. The two bosses 120 may be an inherent structure of the circuit breaker body 100, and the two bosses 120 may be used to set the inlet and outlet terminals of the circuit breaker body 100, respectively.

[0052] The shunt trip unit 200 can be disposed on one side of the first housing 110 along the width direction of the circuit breaker body 100. That is, the shunt trip unit 200 can be disposed on one side of the first housing 110 along the arrangement direction of the incoming and outgoing terminals. When the shunt trip unit 200 is disposed on one side of the first housing 110, the shunt trip unit 200 can be disposed on the boss 120, so that the boss 120 can be used to support the shunt trip unit 200.

[0053] Since the shunt trip unit 200 is set up to remotely operate the circuit breaker body 100 to open, and the contact support 130 can drive the moving contact of the circuit breaker body 100 to rotate during rotation, so that the circuit breaker body 100 can open, the shunt trip unit 200 can be set on the boss 120 near the contact support 130, so that the shunt trip unit 200 and the contact support 130 can be linked together.

[0054] In summary, the shunt trip unit 200 of this application is disposed on one side along the width direction of the circuit breaker body 100, which can save the space occupied in the distribution box along the thickness direction of the circuit breaker body 100 when the circuit breaker device is installed in the distribution box. In this way, the number of circuit breaker devices installed in the distribution box can be increased, thereby increasing the number of distribution circuits in the distribution box. The shunt trip unit 200 is disposed on the boss 120 inherent in the circuit breaker body 100, which not only supports the shunt trip unit 200, but also effectively utilizes the space above the boss 120, thus saving the space occupied by the circuit breaker device in the width direction of the circuit breaker body 100 in the distribution box.

[0055] To further save space required for the installation of circuit breaker devices in the distribution box, this application also improves the shunt trip unit 200. The shunt trip unit 200 mentioned in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0056] Figure 5 This is a schematic diagram of the shunt trip unit provided in an embodiment of this application from another perspective. (See diagram below.) Figure 1 , Figure 2 as well as Figure 5 As shown, the shunt trip unit 200 includes a second housing 210, which is L-shaped. The second housing 210 includes a first sidewall 211, a second sidewall 212, and a third sidewall 213 connected in sequence. The second sidewall 212 is perpendicular to the first sidewall 211, and the second sidewall 212 is perpendicular to the third sidewall 213. The first sidewall 211 contacts the side of the first housing 110 facing the first sidewall 211, the second sidewall 212 contacts the surface of the boss 120, and the third sidewall 213 contacts the side of the first housing 110 facing the third sidewall 213.

[0057] When the second housing 210 is L-shaped, a notch can be formed on the second housing 210, which can match the boss 120. When the shunt trip unit 200 is partially disposed on the boss 120, the second housing 210 can have three side walls facing the first housing 110, namely the first side wall 211, the second side wall 212 and the third side wall 213.

[0058] The first sidewall 211, the second sidewall 212, and the third sidewall 213 are connected in sequence, with the first sidewall 211 and the third sidewall 213 respectively disposed on both sides of the second sidewall 212. One end of the second sidewall 212 is perpendicular to one end of the first sidewall 211, and the other end of the second sidewall 212 is perpendicular to one end of the third sidewall 213, thus forming a stepped structure.

[0059] The protruding length of the boss 120 can be the same as the length of the second sidewall 212. In this way, when the shunt trip unit 200 is disposed on the boss 120, the first sidewall 211 can abut against the side of the first housing 110 facing the first sidewall 211, the second sidewall 212 can abut against the surface of the boss 120, and the third sidewall 213 can abut against the side of the first housing 110 facing the third sidewall 213.

[0060] With the above configuration, the L-shaped second housing 210 forms a notch to accommodate the boss 120, allowing the boss 120 to support the shunt trip unit 200. One end of the second side wall 212 is perpendicular to the first side wall 211, and the other end is perpendicular to the third side wall 213, forming a stepped structure. This allows the first side wall 211, second side wall 212, and third side wall 213 to simultaneously abut against the first housing 110. When the boss 120 supports the shunt trip unit 200, the space above the boss 120 is maximized, allowing the shunt trip unit 200 to be closer to the boss 120. This further saves space occupied by the circuit breaker device in the width direction of the circuit breaker body 100 within the distribution box.

[0061] like Figure 2 as well as Figure 3 As shown, to facilitate the installation of the shunt trip unit 200, the first housing 110 may have a positioning hole 111 on the side facing the first side wall 211, and the first side wall 211 may have a positioning rod 220. The positioning rod 220 is positioned facing the first housing 110 and is located inside the positioning hole 111.

[0062] The positioning hole 111 can be a blind hole structure provided on the side of the first housing 110 facing the first sidewall 211, or the positioning hole 111 can be a through hole structure provided on the side of the first housing 110 facing the first sidewall 211. The positioning hole 111 can be integrally formed with the first housing 110, or the positioning hole 111 can be provided on the sidewall of the first housing 110 facing the first sidewall 211 by means of engraving or grooving after the first housing 110 is formed.

[0063] The positioning rod 220 can be a protrusion structure provided on the side of the first sidewall 211 facing the first housing 110. The positioning rod 220 can be integrally formed with the second housing 210, or the positioning rod 220 can be provided on the first sidewall 211 by snap-fit ​​or adhesive after the second housing 210 is formed. The positioning rod 220 can be positioned opposite to the positioning hole 111. When the shunt trip unit 200 is provided on the boss 120, the positioning rod 220 can be located in the positioning hole 111.

[0064] In summary, because the shunt trip unit 200 has an irregular shape, a positioning hole 111 is provided on the first housing 110 and a positioning rod 220 is provided on the first side wall 211. The positioning hole 111 and the positioning rod 220 cooperate to guide the installation of the shunt trip unit 200, thereby simplifying the installation process and making the installation of the shunt trip unit 200 more convenient.

[0065] Please continue to refer to Figure 2 as well as Figure 3 As shown, the positioning hole 111 is a square hole, and the positioning rod 220 is a quadrangular prism. The wall of the positioning hole 111 abuts against the wall of the positioning rod 220.

[0066] When the positioning rod 220 is located within the positioning hole 111, the wall of the positioning hole 111 can abut against the wall of the positioning rod 220. This allows the shunt trip unit 200 to be limited in both the thickness and height directions of the circuit breaker body 100. The height direction of the circuit breaker body 100 can be perpendicular to both its thickness and width directions simultaneously.

[0067] With the above configuration, when the positioning rod 220 is located within the positioning hole 111, the hole wall of the positioning hole 111 can limit the side wall of the positioning rod 220, thus limiting the shunt trip unit 200 in both the thickness and height directions of the circuit breaker body 100. Furthermore, when the positioning hole 111 is square and the positioning rod 220 is a quadrangular prism, the possibility of the shunt trip unit 200 rotating around the positioning rod 220 as an axis is reduced, improving the stability of the shunt trip unit 200 installation.

[0068] In some possible embodiments, the positioning hole 111 can also be a triangular hole or a polygonal hole, etc. Correspondingly, when the positioning hole 111 is a triangular hole, the positioning rod 220 can be a triangular prism, and when the positioning hole 111 is a polygonal hole, the positioning rod 220 can be a polygonal prism. This application does not limit the shape of the positioning hole 111 and the positioning rod 220, as long as they can limit the shunt trip unit 200 in the thickness and height directions of the circuit breaker body 100.

[0069] Please continue to refer to Figure 2 as well as Figure 3 As shown, to improve the installation stability of the shunt trip unit 200, a limiting hole 112 is provided on the side of the first housing 110 facing the third side wall 213, and a hook 230 is provided on the third side wall 213. The hook 230 is positioned facing the first housing 110 and includes a hook handle and a hook bend. The hook handle is located inside the limiting hole 112, and the hook bend hooks with the inner wall of the first housing 110.

[0070] The limiting hole 112 can be a through hole structure provided on the side wall of the first housing 110 facing the third side wall 213. The limiting hole 112 can be integrally formed with the first housing 110, or the limiting hole 112 can be provided on the side wall of the first housing 110 facing the third side wall 213 by means of carving or grooving after the first housing 110 is formed.

[0071] The hook 230 can be a hook-shaped structure provided on the side of the third sidewall 213 facing the first housing 110. The hook 230 can be integrally formed with the second housing 210, or the hook 230 can be provided on the third sidewall 213 by snapping or bonding after the second housing 210 is formed.

[0072] When the shunt trip unit 200 is mounted on the boss 120, the hook handle of the hook 230 can be located inside the limiting hole 112, and the hook bend of the hook 230 can pass through the limiting hole 112 and enter the interior of the first housing 110 and hook onto the inner wall of the first housing 110.

[0073] In summary, by providing a limiting hole 112 on the first housing 110 and a hook 230 on the third side wall 213, the hook 230 passes through the limiting hole 112 and hooks with the inner wall of the first housing 110, thus limiting the shunt trip unit 200 in the width direction of the circuit breaker body 100. This reduces the possibility of the shunt trip unit 200 falling off the boss 120 and improves the installation stability of the shunt trip unit 200.

[0074] like Figure 2 as well as Figure 5 As shown, the surface of the boss 120 is provided with a mounting hole 121. The second sidewall 212 is provided with a clearance hole 240, which is positioned opposite to the mounting hole 121.

[0075] Since the two bosses 120 on the first housing 110 can be used to set the inlet and outlet terminals of the circuit breaker body 100 respectively, when the external conductor enters the inlet and outlet terminals, it is necessary to fix the external conductor in the inlet and outlet terminals with fastening bolts. At this time, mounting holes 121 need to be provided on the bosses 120 so that the fastening bolts can enter the bosses 120.

[0076] Because when the shunt trip unit 200 is installed on the boss 120, the second side wall 212 is in contact with the surface of the boss 120. In order to avoid the installation of the shunt trip unit 200 from conflicting with the fastening bolt, a clearance hole 240 for avoiding the fastening bolt can be provided on the second side wall 212.

[0077] In summary, due to practical installation requirements, mounting holes 121 can be provided on the surface of the boss 120. A clearance hole 240 is provided on the second sidewall 212, which can provide clearance for the mounting holes 121. When the shunt trip unit 200 is mounted on the boss 120, the second sidewall 212 can contact the surface of the boss 120. This eliminates the need to raise the installation height of the shunt trip unit 200 to make way for the mounting holes 121. Furthermore, the contact between the second sidewall 212 and the surface of the boss 120 allows the shunt trip unit 200 to be placed comfortably on the surface of the boss 120, thereby increasing the installation stability of the shunt trip unit 200.

[0078] Please continue to refer to Figure 2 as well as Figure 5 As shown, the surface of the boss 120 is provided with a protrusion 122, which surrounds the mounting hole 121. The protrusion 122 contacts the wall of the clearance hole 240.

[0079] The protrusion 122 can be a protrusion structure disposed around the mounting hole 121, and the protrusion 122 can be disposed towards the second sidewall 212. The number of protrusions 122 can be one or more. When there is only one protrusion 122, the protrusion 122 can be annular. When there are multiple protrusions 122, the multiple protrusions 122 can be symmetrically disposed in pairs around the edge of the mounting hole 121 with the mounting hole 121 as the axis of symmetry, or the multiple protrusions 122 can be disposed irregularly around the mounting hole 121.

[0080] The diameter of the relief hole 240 can be larger than the diameter of the mounting hole 121. When the shunt trip unit 200 is mounted on the boss 120, the second side wall 212 contacts the boss 120, the protrusion 122 can be located inside the relief hole 240, and the protrusion 122 can abut against the hole wall of the relief hole 240.

[0081] In summary, a protrusion 122 is provided around the mounting hole 121, and the protrusion 122 contacts the wall of the clearance hole 240. The protrusion 122 and the clearance hole 240 can be used to limit the shunt trip unit 200 in the width and thickness directions of the circuit breaker body 100, so that the installation of the shunt trip unit 200 can be more stable.

[0082] By setting up the shunt trip unit 200, the problem that the circuit breaker body 100 only has manual operation for opening and closing and cannot be controlled by external signals can be solved. Therefore, the shunt trip unit 200 needs to support 130-row linkage with the contacts inside the circuit breaker body 100 in order to realize the opening operation of the circuit breaker body 100 through the shunt trip unit 200. The linkage between the shunt trip unit 200 and the circuit breaker body 100 in the embodiment of this application will be clearly and completely described below with reference to the accompanying drawings.

[0083] Figure 6 This is a schematic diagram illustrating the linkage between the tripping mechanism and the contact support provided in an embodiment of this application. Figures 4 to 6 As shown, the shunt trip unit 200 is equipped with a tripping mechanism. The tripping mechanism and the contact support 130 are linked.

[0084] The second housing 210 has a receiving cavity, and the tripping mechanism is disposed in the receiving cavity. When the shunt trip unit 200 is disposed on the boss 120, the tripping mechanism located in the second housing 210 can be linked with the contact support 130 located in the first housing 110.

[0085] In summary, a tripping mechanism is provided in the shunt trip unit 200, and the tripping mechanism is linked with the contact support 130 in the circuit breaker body 100. When the shunt trip unit 200 receives an external signal, the tripping mechanism can drive the contact support 130 to rotate, thereby controlling the circuit breaker body 100 to perform a tripping operation.

[0086] The following description, in conjunction with the accompanying drawings, provides a clear and complete account of the linkage between the tripping mechanism and the contact support 130.

[0087] Figure 7 This is a schematic diagram of the internal structure of the shunt trip unit provided in the embodiments of this application from one perspective. Figure 8 This is a schematic diagram of the internal structure of the shunt trip unit provided in an embodiment of this application, viewed from another perspective. (See diagram below.) Figures 6 to 8 As shown, the circuit breaker body 100 also includes a latch 140 and a support 150. The shunt trip unit 200 includes a coil 270, an armature 280, a drive rod 250, a connecting rod 260, and a spring 261. The armature 280 is inserted into the coil 270, and one end of the armature 280 is linked to one end of the drive rod 250. The latch 140 cooperates with the other end of the drive rod 250, enabling the shunt trip unit 200 to drive the circuit breaker body 100 to open. The support 150, the connecting rod 260, and the spring 261 cooperate to de-energize the shunt trip unit 200 when the circuit breaker body 100 is in the open state.

[0088] The latch 140 and the support 150 can be fixedly connected to the contact support 130 respectively. When the contact support 130 rotates, the latch 140 and the support 150 can rotate synchronously.

[0089] One end of the drive rod 250 is linked to one end of the armature 280, and the other end of the drive rod 250 is inserted into the latch 140. One end of the connecting rod 260 is connected to the support member 150, and the other end of the connecting rod 260 is linked to the spring piece 261. The spring piece 261 includes a first end and a second end. The first end of the spring piece 261 is electrically connected to the coil 270, and the second end of the spring piece 261 is provided with a silver dot 262.

[0090] The shunt trip unit 200 includes an input terminal 215 and an output terminal 214. The input terminal 215 can be connected to the coil 270, and the output terminal 214 can be connected to the silver point 262 on the spring contact 261. When the silver point 262 on the spring contact 261 is connected to the output terminal 214 of the shunt trip unit, the internal circuit of the shunt trip unit 200 is connected. When the silver point 262 on the spring contact 261 is disconnected from the output terminal 214 of the shunt trip unit, the internal circuit of the shunt trip unit 200 is disconnected.

[0091] by Figure 7 as well as Figure 8 Taking the placement of the shunt trip unit 200 as an example. When the shunt trip unit 200 receives an external signal, the coil 270 is energized and a magnetic field is generated inside the coil 270. At this time, the support member 150 is in the state of pressing down one end of the linkage rod 260, and the other end of the linkage rod 260 raises the spring piece 261 so that the silver point 262 is connected to the output terminal 214 of the shunt trip unit.

[0092] The magnetic field generated inside the coil 270 causes the armature 280 to move downward. One end of the armature 280 drives the drive rod 250 to rotate counterclockwise. The end of the drive rod 250 located inside the latch 140 drives the latch 140 to rotate clockwise. While the latch 140 is rotating, the contact support 130 also rotates clockwise. At this time, the circuit breaker body 100 is tripped.

[0093] During the clockwise rotation of the contact support 130, the support member 150 rotates clockwise along with the contact support 130. At this time, the support member 150 no longer presses down on one end of the linkage rod 260. After the linkage rod 260 loses the downward pressure of the support member 150, the other end of the linkage rod 260 no longer applies force to the spring piece 261. The spring piece 261 recovers its deformation under its own elastic force. At this time, the silver point 262 separates from the output terminal 214 of the shunt trip unit, and the internal circuit of the shunt trip unit 200 is disconnected.

[0094] The other end of the armature 280 is equipped with an elastic element. When the coil 270 is energized and generates a magnetic field that causes the armature 280 to move downward, the armature 280 will press down on the elastic element, causing the elastic element to deform. When the internal circuit of the shunt trip 200 is disconnected, no current flows through the coil 270, the magnetic field generated by the coil 270 disappears, and the armature 280 is no longer moved downward by the magnetic field. At this time, the elastic element restores its deformation, causing the armature 280 to reset.

[0095] In summary, this application provides a latch 140 within the circuit breaker body 100 and a drive rod 250 within the shunt trip unit 200. The drive rod 250, in conjunction with the latch 140, enables linkage between the tripping mechanism and the contact support 130. Furthermore, a support member 150 is provided within the circuit breaker body 100, and a connecting rod 260 and a spring 261 are provided within the shunt trip unit 200. The cooperation of the support member 150, the connecting rod 260, and the spring 261 ensures that the shunt trip unit 200 is de-energized when the circuit breaker body 100 is in the open state, thus improving the reliability of the shunt trip unit 200.

[0096] Figure 9 for Figure 7 A schematic diagram of the structure of the shunt trip unit after the coil is removed. Figure 6 as well as Figure 9 As shown, the shunt trip unit 200 also includes an iron core 290. The iron core 290 is located within the coil 270, and is located on the side of the armature 280 away from the drive rod 250.

[0097] The iron core 290 can be an iron block structure installed inside the shunt trip unit 200. The iron core 290 can be installed inside the coil 270, and the iron core 290 can be located on the side of the armature 280 away from the drive rod 250.

[0098] With the above configuration, an iron core 290 is installed inside the coil 270, and the iron core 290 is positioned on the side of the armature 280 away from the drive rod 250. When the coil 270 is energized, the iron core 290 is magnetized. The magnetized iron core 290 attracts the armature 280, allowing the armature 280 to generate a greater force to rotate the drive rod 250. The increased force on the drive rod 250 results in a greater force on the latch 140, making it easier for the contact support 130 to rotate, thus ensuring the tripping effect of the circuit breaker body 100. Therefore, the iron core 290 configuration improves the reliability of the shunt trip unit 200.

Claims

1. A circuit breaker device, characterized by include: The circuit breaker body includes a first housing and a contact support. The contact support is disposed inside the first housing. The first housing has a boss in the width direction of the circuit breaker body. The boss is close to the contact support. The shunt trip unit is disposed on one side of the first housing along the width direction of the circuit breaker body, and the shunt trip unit is disposed on the boss.

2. The circuit breaker apparatus of claim 1, wherein, The shunt trip unit includes a second housing, which is L-shaped; The second housing includes a first sidewall, a second sidewall, and a third sidewall connected in sequence; The second sidewall is perpendicular to the first sidewall, and the second sidewall is perpendicular to the third sidewall; The first sidewall is in contact with the side of the first housing facing the first sidewall, the second sidewall is in contact with the surface of the boss, and the third sidewall is in contact with the side of the first housing facing the third sidewall.

3. The circuit breaker apparatus of claim 2, wherein, The first housing has a positioning hole on the side facing the first sidewall, and the first sidewall has a positioning rod; The positioning rod is positioned toward the first housing and is located within the positioning hole.

4. The circuit breaker apparatus of claim 3, wherein, The positioning hole is a square hole, and the positioning rod is a quadrangular prism. The wall of the positioning hole abuts against the wall of the positioning rod.

5. The circuit breaker apparatus of claim 2, wherein, The first housing has a limiting hole on the side facing the third sidewall, and the third sidewall has a hook; The hook is positioned toward the first housing, and the hook includes a hook handle and a hook bend connected to it; The hook handle is located inside the limiting hole, and the hook bend is hooked to the inner wall of the first housing.

6. The circuit breaker apparatus of claim 2, wherein, The surface of the boss is provided with mounting holes; The second sidewall is provided with a clearance hole, which is positioned opposite to the mounting hole.

7. The circuit breaker apparatus of claim 6, wherein, The surface of the boss is provided with a protrusion, which is arranged around the mounting hole; The protrusion contacts the wall of the relief hole.

8. The circuit breaker device of any one of claims 1-7, wherein, The shunt trip unit is equipped with a tripping mechanism; The tripping mechanism is linked to the contact support.

9. The circuit breaker apparatus of claim 8, wherein, The circuit breaker body also includes a latch and a support component, and the shunt trip unit includes a drive rod, a connecting rod, and a spring. The latch cooperates with the drive rod to enable the shunt trip unit to drive the circuit breaker body to open. The support, the linkage rod, and the spring cooperate to enable the shunt trip unit to be de-energized when the circuit breaker body is in the open state.

10. The circuit breaker apparatus of claim 9, wherein, The shunt trip unit also includes a coil, an armature, and an iron core; The armature is inserted into the coil, and one end of the armature is linked with the drive rod; The iron core is located inside the coil, and the iron core is located on the side of the armature away from the drive rod.

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