A circuit breaker

Abstract

The utility model discloses a circuit breaker belongs to low -voltage electrical apparatus technical field, and the circuit breaker includes base, operating mechanism, leakage protection subassembly, and the base is provided with contact mounting groove and protection structure mounting groove along the length direction of itself side by side, operating mechanism is established in the top of contact mounting groove, and at least part structure of operating mechanism extends to in contact mounting groove, and the both sides of operating mechanism all form the mounting space for installing accessory, and the leakage protection subassembly includes the mounting seat and is established in the leakage release of mounting seat on. Among them, one of the groove wall of protection structure mounting groove and the side of mounting seat is equipped with sliding insertion boss, and the other is equipped with positioning sliding slot, and the leakage protection subassembly is established in protection structure mounting groove, and sliding insertion boss is along the height direction of base and is inserted in positioning sliding slot in sliding. The circuit breaker provided by the utility model, and the accessory can be installed in the single side of operating mechanism, also can be installed in the both sides of operating mechanism, and effectively improve the applicability.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a circuit breaker. Background Technology

[0002] A low-voltage circuit breaker (also known as an automatic switch) is a switching device that can connect and disconnect normal load current and overload current, as well as short-circuit current.

[0003] Currently, to prevent risks such as electric shock and fire and ensure electrical safety, circuit breakers are typically equipped with residual current devices (RCDs) to detect whether the circuit breaker is leaking current. In related technologies, the RCD is usually installed on one side of the circuit breaker's operating mechanism along its width, forcing other accessories to be installed on the other side of the operating mechanism. This affects the overall layout of the circuit breaker, fails to meet specific customer needs, and has poor applicability. Utility Model Content

[0004] The purpose of this utility model is to provide a circuit breaker in which accessories can be installed on both sides of the operating mechanism, thereby improving its applicability.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A circuit breaker is provided, comprising:

[0007] The base has a contact mounting groove and a protective structure mounting groove arranged side by side along its own length.

[0008] An operating mechanism is provided above the contact mounting groove along the height direction of the base, at least a portion of the structure of the operating mechanism extends into the contact mounting groove, and mounting spaces for mounting accessories are formed on both sides of the operating mechanism along the width direction of the base.

[0009] A residual current protection assembly includes a mounting base and a residual current trip unit disposed on the mounting base;

[0010] The protective structure mounting groove has a sliding protrusion on one side of the groove wall and the mounting base, and a positioning groove on the other side. The leakage protection component is located in the protective structure mounting groove, and the sliding protrusion is slidably inserted into the positioning groove along the height direction of the base.

[0011] Optionally, the circuit breaker further includes a top cover, which is disposed on the base and abuts against the sliding protrusion.

[0012] Optionally, the mounting base is provided with a first mounting groove, and the end of the first mounting groove is provided with a buckle. The leakage current trip device is located in the first mounting groove and is engaged with the buckle.

[0013] Optionally, the circuit breaker further includes an electromagnetic tripping assembly disposed on the side of the leakage protection assembly facing the operating mechanism;

[0014] The leakage current protection assembly also includes a zero-sequence current transformer, which is disposed in the mounting groove of the protection structure, and the zero-sequence current transformer is located on one side of the mounting base along the width direction of the base.

[0015] Optionally, a portion of the projection of the mounting base along the height direction of the base is located on the electromagnetic tripping assembly;

[0016] And / or, a portion of the projection of the mounting base along the height direction of the base lies on the zero-sequence current transformer.

[0017] Optionally, the mounting base is provided with two parallel limiting clamps, and the leakage protection component further includes:

[0018] A leakage current push plate is disposed between the two limiting clamps and is rotatably connected to the mounting base. The first end of the leakage current push plate is connected to the leakage current trip device, and the leakage current trip device can push the leakage current push plate to a first angle. When the leakage current push plate is at the first angle, the second end of the leakage current push plate can trigger the operating mechanism to trip.

[0019] A leakage current reset elastic element is disposed between the leakage current push plate and the mounting base. The leakage current reset elastic element provides the leakage current push plate with a force to rotate from the first angle to the second angle. When the leakage current push plate is at the second angle, the second end of the leakage current push plate can be separated from the operating mechanism.

[0020] Optionally, the mounting base is provided with a second mounting groove, and the leakage protection component further includes:

[0021] A leakage current protection circuit board is disposed in the second mounting slot;

[0022] The mounting cover is placed on the second mounting slot.

[0023] Optionally, the mounting base includes a first positioning plate and a second positioning plate spaced apart along a first direction, the first positioning plate and the second positioning plate being arranged at an angle, the first positioning plate being provided with positioning holes, and the second positioning plate being provided with positioning slots;

[0024] The mounting cover has a first positioning protrusion on a first side along a first direction, and a second positioning protrusion on a second side along a first direction. The first positioning protrusion is inserted into the positioning hole, and the second positioning protrusion is engaged in the positioning slot.

[0025] Optionally, the mounting base includes a third positioning plate and a fourth positioning plate disposed opposite to each other along a second direction. Along the third direction, the top end of the third positioning plate is higher than the top end of the fourth positioning plate; the third positioning plate is provided with a positioning groove.

[0026] The mounting cover has a third positioning protrusion on its first side along the second direction, and the third positioning protrusion is inserted into the positioning groove;

[0027] The mounting cover has an extension plate on its second side along the second direction, and the bottom end of the extension plate abuts against the top end of the fourth positioning plate.

[0028] The first direction, the second direction, and the third direction are perpendicular to each other.

[0029] Optionally, the mounting base is provided with a third mounting slot and a fourth mounting slot, and the leakage protection component further includes:

[0030] The contact structure is disposed within the third mounting groove;

[0031] The resistor is located in the fourth mounting slot;

[0032] The contact structure includes a first contact and a second contact, one of which is electrically connected to one end of the resistor. Contact between the first contact and the second contact can cause the leakage current trip device to trigger the operating mechanism to trip. Alternatively, the contact structure includes a first contact, which can contact one end of the resistor to cause the leakage current trip device to trigger the operating mechanism to trip.

[0033] Beneficial effects: The circuit breaker provided by this utility model has contact mounting grooves and protective structure mounting grooves arranged side by side along the length of the base, so that the operating mechanism and the leakage current protection component are arranged side by side along the length of the base. This also provides mounting space for accessories on both sides of the operating mechanism along the width of the base. Depending on the requirements, accessories can be installed on one side or both sides of the operating mechanism, effectively improving applicability. Furthermore, the sliding protrusion slides into the positioning groove along the height of the base, facilitating the positioning and assembly of the leakage current protection component and the base. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the circuit breaker provided by this utility model after removing the top cover;

[0035] Figure 2 This is a schematic diagram of the structure of the base provided by this utility model;

[0036] Figure 3 This utility model provides Figure 2 Enlarged view of the structure at point A in the middle;

[0037] Figure 4 This utility model provides Figure 2 Enlarged view of the structure at point B;

[0038] Figure 5 This is a schematic diagram of the circuit breaker provided by this utility model;

[0039] Figure 6 This is a partial structural diagram of the leakage protection component provided by this utility model after removing the mounting cover;

[0040] Figure 7 This is a schematic diagram of the structure of the mounting base provided by this utility model;

[0041] Figure 8 This is a schematic diagram of the circuit breaker provided by this utility model after removing the base and top cover;

[0042] Figure 9 This is a schematic diagram showing the positional relationship between the electromagnetic tripping assembly and the re-tripping assembly provided by this utility model;

[0043] Figure 10 This is a schematic diagram of the structure of the electromagnetic push plate provided by this utility model;

[0044] Figure 11 This is a schematic diagram of the structure of the leakage protection component provided by this utility model at the base;

[0045] Figure 12 This is a schematic diagram of the leakage current push plate provided by this utility model;

[0046] Figure 13 This is a schematic diagram of the structure of the mounting cover provided by this utility model;

[0047] Figure 14 This is a partial cross-sectional view of the contact structure of the leakage protection component provided by this utility model.

[0048] In the picture:

[0049] 100. Base; 101. Contact mounting groove; 102. Protective structure mounting groove; 103. Positioning slide groove; 104. First receiving groove; 105. Second receiving groove; 106. Wire mounting groove; 107. Third receiving groove; 108. Slot;

[0050] 200. Operating mechanism; 210. Re-clamping component;

[0051] 300. Residual current protection component; 310. Mounting base; 3101. First mounting slot; 3102. Clearance space; 3103. Second mounting slot; 3104. Third mounting slot; 3105. Fourth mounting slot; 311. Sliding protrusion; 312. Inverted clip; 313. Limiting clamp; 314. Overlap plate; 315. First positioning plate; 3151. Positioning hole; 316. Second positioning plate; 3161. Positioning slot; 317. Third positioning plate; 3171. Positioning groove; 3172. Clearance groove; 3173. Second wiring groove; 318. Fourth positioning plate; 3181. Extension groove; 3182. First wiring groove; 3183. First flange; 3184. Third flange; 320. Residual current trip unit; 3 21. Moving iron core; 330. Zero-sequence current transformer; 340. Leakage current push plate; 341. Hinge part; 342. Clamping arm; 343. Leakage current trigger plate; 350. Leakage current reset elastic element; 360. Leakage current protection circuit board; 370. Mounting cover; 371. First positioning protrusion; 372. Second positioning protrusion; 373. Third positioning protrusion; 374. Extension plate; 3741. Second flange; 375. Extension part; 3751. Fourth flange; 380. Contact structure; 381. First contact piece; 3811. First piece; 3812. Second piece; 382. Second contact piece; 3821. Third piece; 3822. Fourth piece; 383. First screw connector; 384. Second screw connector; 390. Resistor;

[0052] 410. Contact assembly; 420. Neutral wire; 431. First terminal block; 432. Second terminal block; 433. Third terminal block; 440. Arc extinguishing assembly; 450. First button; 460. Second button;

[0053] 500, Top Cover;

[0054] 600. Electromagnetic trip assembly; 610. Support frame; 611. Limiting protrusion; 620. Electromagnetic trip device; 630. Electromagnetic push plate; 631. Limiting groove; 632. Electromagnetic trigger plate; 633. Electromagnetic limit plate; 640. Electromagnetic reset elastic element. Detailed Implementation

[0055] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0056] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0059] Reference Figures 1 to 6 As shown, this embodiment provides a circuit breaker, which includes a base 100, an operating mechanism 200, and a residual current device (RCD) 300. The operating mechanism 200 is used to open and close the circuit breaker, thereby connecting and disconnecting the main circuit connected to the circuit breaker. The RCD 300 is used to trigger the operating mechanism 200 to trip when there is a leakage current in the main circuit connected to the circuit breaker, thereby tripping the circuit breaker and disconnecting the main circuit.

[0060] Specifically, the base 100 has a contact mounting groove 101 and a protective structure mounting groove 102 arranged side by side along its length; the operating mechanism 200 is located above the contact mounting groove 101 along the height direction of the base 100, and at least a portion of the structure of the operating mechanism 200 extends into the contact mounting groove 101. The operating mechanism 200 has mounting spaces for mounting accessories on both sides along the width direction of the base 100; the leakage protection assembly 300 includes a mounting base 310 and a leakage trip unit 320 mounted on the mounting base 310. The protective structure mounting groove 102 has a sliding protrusion 311 on one side of its groove wall and the mounting base 310 has a positioning groove 103 on the other side. The leakage protection assembly 300 is located within the protective structure mounting groove 102, and the sliding protrusion 311 is slidably inserted into the positioning groove 103 along the height direction of the base 100.

[0061] It is understandable that the residual current device 320 can trigger the operating mechanism 200 to trip when there is a leakage in the main circuit connected to the circuit breaker. For example, the operating mechanism 200 can be tripped by pushing the re-tightening component 210 of the operating mechanism 200 to swing, thereby causing the circuit breaker to trip and disconnect the main circuit.

[0062] For example, the protective structure mounting groove 102 has at least one positioning groove 103 on its groove wall, and the mounting base 310 has at least one sliding protrusion 311 on its side. The positioning groove 103 and the sliding protrusion 311 are arranged in a one-to-one correspondence. The number of positioning grooves 103 can be two to five. For example, along the width direction of the base 100, two positioning grooves 103 are spaced apart on the groove wall of the protective structure mounting groove 102. The positioning groove 103 can be dovetail-shaped, that is, the shape of the part of the structure into which the sliding protrusion 311 is inserted into the positioning groove 103 is also dovetail-shaped.

[0063] In this embodiment, the contact mounting groove 101 and the protective structure mounting groove 102 are arranged side by side along the length of the base 100, so that the operating mechanism 200 and the leakage protection component 300 are arranged side by side along the length of the base 100. This allows for the provision of mounting space for accessories on both sides of the operating mechanism 200 along the width of the base 100. Depending on the requirements, accessories can be installed on one side or both sides of the operating mechanism 200, effectively improving applicability. In addition, the sliding protrusion 311 slides into the positioning groove 103 along the height of the base 100, facilitating the positioning and assembly of the leakage protection component 300 and the base 100.

[0064] It is understood that the circuit breaker also includes a contact assembly 410, which is disposed within the contact mounting slot 101. The contact assembly 410 includes a moving contact (not shown) and a stationary contact (not shown). The operating mechanism 200 is used to drive the moving contact to contact or separate from the stationary contact, thereby closing or opening the circuit breaker. The circuit breaker includes at least one contact assembly 410, and the contact assemblies 410 and contact mounting slots 101 are correspondingly arranged.

[0065] It is understood that the circuit breaker also includes a first terminal 431 and a second terminal 432, both of which are mounted on the base 100. The first terminal 431 is electrically connected to the corresponding moving contact, and the second terminal 432 is electrically connected to the corresponding stationary contact. Along the length of the base 100, the operating mechanism 200 and the leakage protection component 300 are both located between the first terminal 431 and the second terminal 432. It is understood that both the first terminal 431 and the second terminal 432 are used for wiring the main circuit. The base 100 has a first receiving groove 104 for accommodating the first terminal 431 and a second receiving groove 105 for accommodating the second terminal 432.

[0066] In some embodiments, refer to Figure 1 and Figure 2 As shown, the circuit breaker also includes a neutral wire 420. A wire mounting groove 106 is provided on the base 100, and a portion of the neutral wire 420 is located within the wire mounting groove 106. The wire mounting groove 106 and the contact mounting groove 101 are arranged side-by-side along the width direction of the base 100. The base 100 is provided with a third terminal 433 connected to the neutral wire 420. The base 100 is also provided with a third receiving groove 107 to accommodate the third terminal 433.

[0067] In some embodiments, the circuit breaker further includes an arc extinguishing assembly 440, which is disposed in the contact mounting groove 101, and the arc extinguishing assembly 440 and the contact assembly 410 are arranged in a one-to-one correspondence.

[0068] In some embodiments, refer to Figure 2 , Figure 5 and Figure 6 As shown, the circuit breaker also includes a top cover 500, which is placed on the base 100 and abuts against the sliding protrusion 311 to form a limit, preventing the sliding protrusion 311 from disengaging from the positioning groove 103, thus ensuring stability and reliability.

[0069] In some embodiments, refer to Figure 6 and Figure 7As shown, the mounting base 310 is provided with a first mounting groove 3101, and the end of the first mounting groove 3101 is provided with a buckle 312. The leakage current trip unit 320 is located in the first mounting groove 3101 and is engaged with the buckle 312, which facilitates the positioning and assembly of the leakage current trip unit 320.

[0070] In some embodiments, refer to Figure 1 , Figure 2 , Figure 4 , Figures 8 to 11 As shown, the circuit breaker also includes an electromagnetic trip assembly 600, which is located on the side of the residual current device 300 facing the operating mechanism 200, thus improving the compactness of the circuit breaker structure. The electromagnetic trip assembly 600 is used to trigger the operating mechanism 200 to trip when a short circuit occurs in the main circuit connected to the circuit breaker.

[0071] For example, the electromagnetic tripping assembly 600 is configured in a one-to-one correspondence with the contact assembly 410.

[0072] Exemplarily, the electromagnetic tripping assembly 600 includes a support frame 610, an electromagnetic trip unit 620, an electromagnetic push plate 630, and an electromagnetic reset elastic element 640. Slots 108 are provided on two opposite sidewalls of the contact mounting groove 101, and the support frame 610 is inserted into the slots 108 along the height direction of the base 100. The electromagnetic trip unit 620 and the electromagnetic push plate 630 are both disposed on the support frame 610, and the electromagnetic reset elastic element 640 is disposed between the electromagnetic push plate 630 and the support frame 610. When the main circuit connected to the circuit breaker is short-circuited, the electromagnetic trip unit 620 pushes the electromagnetic push plate 630 to rotate relative to the support frame 610, so that the electromagnetic push plate 630 triggers the operating mechanism 200 (e.g., the re-tightening assembly 210 of the operating mechanism 200) to trip; when the main circuit connected to the circuit breaker is operating normally, under the elastic force of the electromagnetic reset elastic member 640, the electromagnetic push plate 630 and the operating mechanism 200 (e.g., the re-tightening assembly 210 of the operating mechanism 200) remain separated.

[0073] For example, the electromagnetic trip unit 620 can be a hydraulic electromagnetic trip unit 620.

[0074] For example, the electromagnetic reset elastic element 640 can be a spring. The electromagnetic reset elastic element 640 can be connected to the support frame 610 and the electromagnetic push plate 630 by means of hooks.

[0075] For example, the support frame 610 has two limiting protrusions 611 opposite to each other, and the electromagnetic push plate 630 has two limiting grooves 631 opposite to each other. The limiting protrusions 611 clamp the electromagnetic push plate 630 at the limiting grooves 631, so that the electromagnetic push plate 630 can swing relative to the support frame 610. For example, the two limiting protrusions 611 can be L-shaped.

[0076] For example, the electromagnetic push plate 630 is bent and provided with an electromagnetic trigger plate 632, and the electromagnetic push plate 630 can push the latching assembly 210 through the electromagnetic trigger plate 632.

[0077] For example, an electromagnetic limiting plate 633 is bent on the electromagnetic push plate 630. When the electromagnetic limiting plate 633 abuts against the support frame 610, the electromagnetic push plate 630 (e.g., the electromagnetic trigger plate 632 of the electromagnetic push plate 630) remains separated from the re-clamping assembly 210.

[0078] In one feasible implementation, a portion of the projection of the mounting base 310 along the height direction of the base 100 is located on the electromagnetic tripping assembly 600, which helps to improve the structural compactness of the circuit breaker.

[0079] For example, the mounting base 310 has a clearance space 3102 at its bottom on the side facing the operating mechanism 200, and at least a portion of the electromagnetic tripping assembly 600 is located within the clearance space 3102.

[0080] In one feasible implementation, the circuit breaker further includes a first button 450, which is disposed opposite to the electromagnetic trigger plate 632. Pressing the first button 450 can cause the first button 450 to push against the electromagnetic trigger plate 632 to trigger the operating mechanism 200 to trip.

[0081] For example, the first button 450 is slidably disposed on the top cover 500.

[0082] In some embodiments, refer to Figure 1 , Figure 2 and Figure 8 As shown, the leakage protection assembly 300 also includes a zero-sequence current transformer 330, which is disposed in the mounting groove 102 of the protection structure and is located on one side of the mounting base 310 along the width direction of the base 100, which is beneficial to improving the structural compactness of the circuit breaker.

[0083] For example, the mounting base 310 may be positioned above the zero-sequence current transformer 330.

[0084] In one feasible implementation, a portion of the projection of the mounting base 310 along the height direction of the base 100 is located on the zero-sequence current transformer 330, which helps to improve the structural compactness of the circuit breaker.

[0085] In some embodiments, refer to Figure 6 , Figure 7 , Figure 11 and Figure 12As shown, the leakage current protection assembly 300 also includes a leakage current push plate 340 and a leakage current reset elastic element 350. The leakage current push plate 340 is rotatably mounted on the mounting base 310, and the leakage current reset elastic element 350 is disposed between the mounting base 310 and the leakage current push plate 340. The leakage current trip unit 320 triggers the operating mechanism 200 to trip via the leakage current push plate 340. The first end of the leakage current push plate 340 is connected to the leakage current trip unit 320, which can push the leakage current push plate 340 to a first angle. When the leakage current push plate 340 is at the first angle, the second end of the leakage current push plate 340 can trigger the operating mechanism 200 (e.g., the re-clamping assembly 210 of the operating mechanism 200) to trip. The leakage reset elastic element 350 provides a force for the leakage push plate 340 to rotate from the first angle to the second angle. When the leakage push plate 340 is at the second angle, the second end of the leakage push plate 340 can be separated from the operating mechanism 200 (e.g., the re-clamping assembly 210 of the operating mechanism 200).

[0086] In one feasible implementation, two limiting clamps 313 are provided in parallel on the mounting base 310, and the leakage current push plate 340 is disposed between the two limiting clamps 313 to limit the leakage current push plate 340, which helps to improve the stability of the rotation of the leakage current push plate 340.

[0087] For example, the leakage protection assembly 300 also includes a pin, and the leakage push plate 340 is bent on both sides along the width direction to form a hinge portion 341. The pin passes through the two limiting clamps 313 and the two hinge portions 341 to realize the rotational connection between the leakage push plate 340 and the mounting base 310.

[0088] For example, the leakage current reset elastic element 350 can be a torsion spring, including a spring body and two spring arms. The mounting base 310 has an overlapping plate 314 between the two limiting clamps 313, the spring body is sleeved on the pin, one of the two spring arms abuts against the overlapping plate 314, and the other abuts against the leakage current push plate 340.

[0089] In one feasible implementation, two clamping arms 342 are arranged opposite each other at the first end of the leakage current push plate 340, and an annular groove (not shown) is provided around the moving iron core 321 of the leakage current trip device 320. The two clamping plates are clamped at the annular groove of the moving iron core 321 of the leakage current trip device 320 for easy assembly.

[0090] For example, the second end of the leakage current push plate 340 is bent and provided with a leakage current trigger plate 343, and the leakage current push plate 340 can push the re-clamping component 210 through the leakage current trigger plate 343.

[0091] In some embodiments, refer to Figure 6 , Figure 7 , Figure 11 and Figure 13As shown, the mounting base 310 is provided with a second mounting groove 3103, and the leakage current protection assembly 300 also includes a leakage current protection circuit board 360 and a mounting cover 370. The leakage current protection circuit board 360 is disposed in the second mounting groove 3103, and the mounting cover 370 is disposed on the second mounting groove 3103 to achieve closed installation of the leakage current protection circuit board 360, which is beneficial to improving safety.

[0092] Exemplarily, the residual current circuit board 360 is electrically connected to the residual current trip unit 320. To facilitate the electrical connection between the residual current circuit board 360 and the residual current trip unit 320, the first mounting slot 3101 and the second mounting slot 3103 are interconnected. The residual current circuit board 360 and the residual current trip unit 320 can be soldered together. It is understood that the residual current circuit board 360 can receive leakage current signals and control the residual current trip unit 320 to trigger the operating mechanism 200 to trip. The wiring of the residual current circuit board 360 other than that with the residual current trip unit 320 is prior art and will not be described in detail in this embodiment.

[0093] For example, the first mounting groove 3101 and the second mounting groove 3103 are arranged side by side along a first direction. The first direction can be the width direction of the base 100. Of course, the first direction can also be the length direction of the base 100 or other directions; this embodiment does not limit this.

[0094] In one feasible implementation, the mounting base 310 includes a first positioning plate 315 and a second positioning plate 316 spaced apart along a first direction. The first positioning plate 315 is provided with a positioning hole 3151, and the second positioning plate 316 is provided with a positioning slot 3161, which facilitates molding.

[0095] For example, the mounting cover 370 is provided with a first positioning protrusion 371 on a first side along the first direction, and a second positioning protrusion 372 on a second side along the first direction. The first positioning protrusion 371 is inserted into the positioning hole 3151, and the second positioning protrusion 372 is engaged in the positioning slot 3161, which helps to improve the connection stability between the mounting cover 370 and the mounting base 310.

[0096] For example, the first positioning plate 315 and the second positioning plate 316 are arranged at an angle, which helps to improve the structural stability of the second positioning plate 316 at the positioning slot 3161. For example, the first positioning plate 315 and the second positioning plate 316 are perpendicular to each other.

[0097] For example, the first positioning plate 315 may be a part of the structure used to enclose the second mounting groove 3103.

[0098] In one feasible embodiment, the mounting base 310 includes a third positioning plate 317 and a fourth positioning plate 318 disposed opposite to each other along a second direction. Along the third direction, the top end of the third positioning plate 317 is higher than the top end of the fourth positioning plate 318. The third positioning plate 317 is provided with a positioning groove 3171 for easy forming. The first direction, the second direction, and the third direction are perpendicular to each other. Taking the width direction of the base 100 as an example, the second direction can be the length direction of the base 100, and the third direction can be the height direction of the base 100.

[0099] For example, the third positioning plate 317 and the fourth positioning plate 318 may be part of the structure used to enclose the second mounting groove 3103.

[0100] For example, the mounting cover 370 is provided with a third positioning protrusion 373 on the first side along the second direction. The third positioning protrusion 373 is inserted into the positioning groove 3171, which helps to improve the connection stability between the mounting cover 370 and the mounting base 310.

[0101] For example, the top of the third positioning plate 317 is provided with a clearance groove 3172. In this embodiment, the mounting cover 370 is provided with at least one third positioning protrusion 373, such as two or three, and the positioning groove 3171 is provided in a one-to-one correspondence with the third positioning protrusion 373. Figure 7 and Figure 13 As shown, the mounting cover 370 is provided with two third positioning protrusions 373 at intervals along the first direction, and two positioning grooves 3171 are provided. One of the two positioning grooves 3171 is provided on the groove wall of the relief groove 3172, and the other is provided on one side edge of the third positioning plate 317.

[0102] For example, the mounting cover 370 is provided with an extension plate 374 on the second side along the second direction. The bottom end of the extension plate 374 abuts against the top end of the fourth positioning plate 318, which helps to improve the connection stability between the mounting cover 370 and the mounting base 310.

[0103] For example, the top of the fourth positioning plate 318 is provided with an extension groove 3181, and the bottom of the extension plate 374 is provided with an extension portion 375, which is inserted into the extension groove 3181.

[0104] For example, the top end of the fourth positioning plate 318 is provided with a first flange 3183, and the bottom end of the extension plate 374 is provided with a second flange 3741. The second flange 3741 is located on the side of the first flange 3183 away from the third positioning plate 317, and the second flange 3741 abuts against the first flange 3183. This is beneficial to improving the connection stability between the mounting cover 370 and the mounting base 310, and also beneficial to improving the sealing performance of the second mounting groove 3103. The bottom end of the second flange 3741 abuts against the top end of the fourth positioning plate 318, and / or the top end of the first flange 3183 abuts against the bottom end of the extension plate 374. In some embodiments, the bottom of the extension groove 3181 is provided with a third flange 3184, and the bottom end of the extension 375 is provided with a fourth flange 3751. The third flange 3184 is located on the side of the fourth flange 3751 away from the third positioning plate 317.

[0105] For example, the top of the fourth positioning plate 318 may be provided with a first wire-passing groove 3182, and the wires connected to the circuit board may pass through the second mounting groove 3103 through the first wire-passing groove 3182. There is at least one wire-passing groove, for example, two are provided side by side.

[0106] In some embodiments, refer to Figure 6 , Figure 7 , Figure 11 and Figure 14 As shown, the leakage current protection component 300 also includes a contact structure 380 and a resistor 390, both of which are mounted on the mounting base 310. The contact structure 380 includes a first contact 381 and a second contact 382. One of the first contact 381 and the second contact 382 is electrically connected to one end of the resistor 390, and the contact between the first contact 381 and the second contact 382 enables the leakage current trip unit 320 to trigger the operating mechanism 200 to trip.

[0107] For example, taking a three-phase circuit breaker as an example, the other of the first contact 381 and the second contact 382 can be electrically connected to phase A or phase C of the circuit breaker via a lead.

[0108] For example, the other end of the resistor 390 can be electrically connected to the leakage current protection circuit board 360. The third positioning plate 317 may be provided with a second wire groove 3173, and the other end of the resistor 390 can pass through the second wire groove 3173 and be electrically connected to the leakage current protection circuit board 360.

[0109] In one feasible implementation, the mounting base 310 is provided with a third mounting groove 3104, and the contact structure 380 is disposed in the third mounting groove 3104 to realize the positioning and assembly of the contact structure 380.

[0110] For example, the third positioning plate 317 can separate the second mounting slot 3103 and the third mounting slot 3104.

[0111] Exemplarily, the first contact 381 includes a first portion 3811 and a second portion 3812 disposed at an obtuse angle. The first portion 3811 can be fastened to the mounting base 310 by a first screw 383. The second portion 3812 is used to contact the second contact 382 to trip the tripping mechanism 200 of the residual current device 320. It is understood that in its natural state, the second portion 3812 remains separate from the first contact 381. One end of the resistor 390 is electrically connected to the first portion 3811, for example, by soldering.

[0112] For example, the second contact 382 may be U-shaped or V-shaped. For example, the second contact 382 includes a third portion 3821 and a fourth portion 3822 that are bent into place. The third portion 3821 can be fastened to the mounting base 310 by a second screw 384. The second portion 3812 can contact the fourth portion 3822 to trigger the tripping mechanism 200 of the residual current device 320.

[0113] In one feasible implementation, the mounting base 310 is provided with a fourth mounting groove 3105, and the resistor 390 is disposed in the fourth mounting groove 3105 to achieve the positioning and assembly of the resistor 390. The third mounting groove 3104 and the fourth mounting groove 3105 are interconnected to facilitate wiring between the contact structure 380 and the resistor 390.

[0114] For example, the length direction of the fourth mounting slot 3105 can extend along the first direction, and the fourth mounting slot 3105 is located along the second direction on the side of the third mounting slot 3104 away from the second mounting slot 3103. The resistor 390 is placed horizontally in the fourth mounting slot 3105, that is, the length direction of the resistor 390 extends along the first direction, which facilitates wiring.

[0115] For example, the length direction of the fourth mounting slot 3105 can extend along a third direction, and the fourth mounting slot 3105 and the third mounting slot 3104 are arranged side by side along the first direction, resulting in a compact structure. The resistor 390 is vertically inserted into the fourth mounting slot 3105, meaning the length direction of the resistor 390 extends along a third direction.

[0116] In one feasible implementation, the circuit breaker further includes a second button 460, which is disposed opposite to the first contact 381. Pressing the second button 460 can make the first contact 381 and the second contact 382 contact each other.

[0117] For example, the second button 460 slides through the top cover 500.

[0118] In some embodiments, the contact structure 380 includes only the first contact 381, that is, the contact structure 380 does not include the second contact 382. The first contact 381 can contact one end of the resistor 390 to cause the leakage current trip 320 to trip the operating mechanism 200. In this embodiment, pressing the second button 460 can cause the first contact 381 to contact one end of the resistor 390.

[0119] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A circuit breaker, characterized in that, include: The base (100) has a contact mounting groove (101) and a protective structure mounting groove (102) arranged side by side along its own length. An operating mechanism (200) is disposed above the contact mounting groove (101) along the height direction of the base (100), at least a portion of the structure of the operating mechanism (200) extends into the contact mounting groove (101), and the operating mechanism (200) has mounting spaces for mounting accessories formed on both sides along the width direction of the base (100). The residual current protection assembly (300) includes a mounting base (310) and a residual current trip unit (320) disposed on the mounting base (310). The protective structure mounting groove (102) has a sliding protrusion (311) on one side wall and the mounting base (310) on the other side, and a positioning groove (103) on the other side. The leakage protection component (300) is located in the protective structure mounting groove (102), and the sliding protrusion (311) is slidably inserted into the positioning groove (103) along the height direction of the base (100).

2. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a top cover (500) which covers the base (100) and abuts against the sliding protrusion (311).

3. The circuit breaker according to claim 1, characterized in that, The mounting base (310) is provided with a first mounting groove (3101), and the end of the first mounting groove (3101) is provided with a buckle (312). The leakage trip device (320) is located in the first mounting groove (3101) and is engaged with the buckle (312).

4. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes an electromagnetic tripping assembly (600) disposed on the side of the leakage protection assembly (300) facing the operating mechanism (200); The leakage protection assembly (300) also includes a zero-sequence current transformer (330) disposed in the mounting groove (102) of the protection structure, and the zero-sequence current transformer (330) is located on one side of the mounting base (310) along the width direction of the base (100).

5. The circuit breaker according to claim 4, characterized in that, A portion of the mounting base (310) along the height direction of the base (100) is projected onto the electromagnetic tripping assembly (600); And / or, a portion of the mounting base (310) along the height direction of the base (100) is projected onto the zero-sequence current transformer (330).

6. The circuit breaker according to any one of claims 1-5, characterized in that, The mounting base (310) is provided with two parallel limiting clamps (313), and the leakage protection assembly (300) further includes: A leakage current push plate (340) is disposed between the two limiting clamps (313), and the leakage current push plate (340) is rotatably connected to the mounting base (310). The first end of the leakage current push plate (340) is connected to the leakage current trip device (320), and the leakage current trip device (320) can push the leakage current push plate (340) to a first angle. When the leakage current push plate (340) is at the first angle, the second end of the leakage current push plate (340) can trigger the operating mechanism (200) to trip. A leakage current reset elastic element (350) is disposed between the leakage current push plate (340) and the mounting base (310). The leakage current reset elastic element (350) provides the leakage current push plate (340) with a force that rotates from the first angle to the second angle. When the leakage current push plate (340) is at the second angle, the second end of the leakage current push plate (340) can be separated from the operating mechanism (200).

7. The circuit breaker according to any one of claims 1-5, characterized in that, The mounting base (310) is provided with a second mounting groove (3103), and the leakage protection component (300) further includes: A leakage current protection circuit board (360) is disposed in the second mounting slot (3103); The mounting cover (370) is placed on the second mounting slot (3103).

8. The circuit breaker according to claim 7, characterized in that, The mounting base (310) includes a first positioning plate (315) and a second positioning plate (316) spaced apart along a first direction. The first positioning plate (315) and the second positioning plate (316) are arranged at an angle. The first positioning plate (315) is provided with a positioning hole (3151), and the second positioning plate (316) is provided with a positioning slot (3161). The mounting cover (370) has a first positioning protrusion (371) on a first side along a first direction, and a second positioning protrusion (372) on a second side along a first direction. The first positioning protrusion (371) is inserted into the positioning hole (3151), and the second positioning protrusion (372) is engaged in the positioning slot (3161).

9. The circuit breaker according to claim 8, characterized in that, The mounting base (310) includes a third positioning plate (317) and a fourth positioning plate (318) arranged opposite to each other along a second direction. Along the third direction, the top of the third positioning plate (317) is higher than the top of the fourth positioning plate (318); the third positioning plate (317) is provided with a positioning groove (3171). The mounting cover (370) has a third positioning protrusion (373) on the first side along the second direction, and the third positioning protrusion (373) is inserted into the positioning groove (3171); The mounting cover (370) has an extension plate (374) on the second side along the second direction, and the bottom end of the extension plate (374) abuts against the top end of the fourth positioning plate (318). The first direction, the second direction, and the third direction are perpendicular to each other.

10. The circuit breaker according to any one of claims 1-5, characterized in that, The mounting base (310) is provided with a third mounting slot (3104) and a fourth mounting slot (3105), and the leakage protection component (300) further includes: The contact structure (380) is disposed in the third mounting groove (3104); A resistor (390) is disposed in the fourth mounting slot (3105); The contact structure (380) includes a first contact (381) and a second contact (382), one of which is electrically connected to one end of the resistor (390). The contact between the first contact (381) and the second contact (382) can cause the leakage current trip device (320) to trigger the operating mechanism (200) to trip. Alternatively, the contact structure (380) includes a first contact (381), which can contact one end of the resistor (390) to cause the leakage current trip device (320) to trigger the operating mechanism (200) to trip.

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