Plug-in circuit breaker

Abstract

The plug-in circuit breaker comprises a shell, two ends of the shell are respectively an operation end and a wiring end, an operation mechanism, a control module and an accessory module are arranged in the shell close to the operation end, the control module comprises a circuit board, the accessory module comprises a support, the support is adjacent to the operation mechanism and is provided with at least one function unit, and the function unit is connected with the control module. The circuit board is attached and fixed to the support, and the plane where the circuit board is located is parallel to a connecting line from the operation end to the wiring end. According to the utility model, the circuit board and the function unit are both arranged on the support, the structure is compact, the circuit board and the accessory module can be conveniently assembled in the shell together, and meanwhile, the circuit board is arranged along the direction parallel to the connecting line between the operation end and the wiring end, so that the circuit board is prevented from occupying too much space, and the size is reduced.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to a plug-in circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Existing molded case circuit breakers are equipped with an accessory module including at least one functional unit. The functional unit realizes additional functions by cooperating with the operating mechanism and control module of the circuit breaker. Usually, the functional unit is one or any combination of two or more of the auxiliary contact unit, auxiliary alarm contact unit and shunt trip unit. However, in the existing molded case circuit breakers, there are the following defects: First, the accessory module has many parts, and the assembly is complex and scattered, which not only increases the difficulty of assembly, but also is not conducive to the wiring of the circuit board of the accessory module and the control module. The required reserved space is too large, resulting in an overall large volume; second, there are many wiring harnesses in the circuit breaker, which makes the internal wiring harnesses messy and not conducive to assembly. Summary of the invention

[0003] The utility model aims to overcome at least one defect of the prior art and provide a plug-in circuit breaker.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a plug-in circuit breaker, comprising a shell, wherein two ends of the shell are respectively an operating end and a wiring terminal, an operating mechanism, a control module and an accessory module are arranged in the shell near the operating end, the control module comprises a circuit board, the accessory module comprises a bracket, the bracket is adjacent to the operating mechanism and is configured with at least one functional unit, the circuit board is fitted and fixed on the bracket, and the plane where the circuit board is located is parallel to the connection line from the operating end to the wiring terminal.

[0006] Preferably, the bracket is provided with at least one mounting slot, and the circuit board is plugged into the mounting slot.

[0007] Preferably, one side of the bracket is provided with an assembly groove for assembling the functional unit, and the installation groove is arranged in parallel with at least a part of the side area of ​​the assembly groove.

[0008] Preferably, a partition for separating functional units is provided in the assembly groove.

[0009] Preferably, the bracket is provided with at least one clip, and at least one side edge of the circuit board is clipped by the clip.

[0010] Preferably, the shell includes a base and a face cover covering the base, the face cover is provided with an operating hole, an operating member connected to the operating mechanism passes through the operating hole, the bracket is fixed to a side of the base facing the face cover, and the face cover is provided with at least one positioning rib for limiting the circuit board.

[0011] Preferably, it further comprises a wiring board, which is arranged in the housing along at least one outer side of the bracket, and the wiring board is provided with a plurality of wire positioning parts.

[0012] Preferably, the wiring board is mounted in the housing, and at least a portion of the wiring board is opposite to the circuit board.

[0013] Preferably, the plane where the wiring board is located is perpendicular to the line between the operating end and the wiring terminal, and the wire positioning portion faces the operating end or the wiring terminal; and / or, the plane where the wiring board is located is parallel to the line between the operating end and the wiring terminal, and the wire positioning portion faces the bracket;

[0014] The wiring board is provided with two rows of wire positioning parts which are arranged at intervals. The two rows of wire positioning parts are respectively arranged along two sides of the same surface of the wiring board and are staggered and opposite to each other.

[0015] Preferably, the functional unit is at least one of an auxiliary contact unit, an auxiliary alarm contact unit and a shunt trip unit.

[0016] The plug-in circuit breaker of the utility model, the circuit board and the functional unit are both arranged on the bracket, and the structure is compact, which facilitates the assembly of the circuit board and the accessory module in the housing. At the same time, the circuit board is arranged in a direction parallel to the connection direction between the operating end and the wiring terminal, so as to avoid the circuit board from occupying too much space and help to reduce the volume.

[0017] In addition, the circuit board can be plugged into the bracket through the mounting slot, making it easy to disassemble and assemble.

[0018] In addition, the positioning ribs on the cover can help fix the circuit board and prevent it from shaking.

[0019] In addition, the circuit board and the bracket can be fixed to the bracket by buckles, and the assembly method is flexible and has a wide range of applications.

[0020] In addition, by configuring the wiring board, the wire positioning part facilitates wiring, avoids the wiring harness being cluttered inside the circuit breaker, and facilitates assembly.

[0021] In particular, the wiring board is installed in the housing, which has the advantage of being easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the plug-in circuit breaker of the utility model;

[0023] Figure 2 It is a schematic diagram of the exploded structure of the plug-in circuit breaker of the utility model;

[0024] Figure 3 It is a partial enlarged schematic diagram of the plug-in circuit breaker of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the bracket in the utility model;

[0026] Figure 5 It is a structural schematic diagram of the wiring board in the utility model;

[0027] Reference numerals:

[0028] 11-face cover, 111-operating hole, 12-base, 121-first base, 122-second base, 120-assembly boss, 2-accessory module, 20-bracket, 201-first assembly slot, 202-second assembly slot, 203-installation slot, 204-partition, 205-fixing ear plate, 21-auxiliary contact unit, 22-auxiliary alarm contact unit, 23-shunt trip unit, 3-circuit board, 4-wiring board, 41-wire positioning part, 42-card slot. DETAILED DESCRIPTION

[0029] The following is a further description of the specific implementation of the plug-in circuit breaker of the utility model in conjunction with the embodiments given in the accompanying drawings. The plug-in circuit breaker of the utility model is not limited to the description of the following embodiments.

[0030] like Figure 1 As shown, the plug-in circuit breaker includes a shell, and the opposite ends of the shell serve as an operating end and a wiring end respectively. The operating end is provided with an operating hole 111, and the wiring end is provided with at least one pair of wiring sockets. An operating mechanism and at least one circuit breaker pole are arranged in the shell, and the operating mechanism is connected to an operating member, which extends from the operating hole 111 provided on the shell to the outside of the shell for manually driving the operating mechanism.

[0031] A control module and an accessory module 2 are also provided in the housing. The control module includes a circuit board 3, wherein the circuit board 3 is provided with a controller, and the controller is used to receive feedback signals and output control signals; the accessory module 2 includes at least one functional unit, and the functional unit can be connected to the circuit board 3 so that the functional unit can act according to the control signal output by the controller. For example, the accessory module 2 includes a flux tripping unit (not shown), and the flux tripping unit is connected to the circuit board 3. The coil in the flux tripping unit is energized or de-energized according to the control signal, so that the moving iron core driven by the coil is actuated, and the moving iron core triggers the operating mechanism to trip, which is used for leakage tripping or other fault tripping; of course, the functional unit may not be connected to the circuit board 3 inside the circuit breaker. The functional unit is only installed in the circuit breaker, and its power line and control line are connected to the outside of the circuit breaker. For example, the functional unit is a shunt trip unit 23 that can trigger the operating mechanism to trip. For example, the accessory module 2 includes an auxiliary contact unit 21 and / or an auxiliary alarm contact unit 22. The auxiliary contact unit 21 is used to feedback the opening and closing status of the contact mechanism in the circuit breaker pole, and the auxiliary alarm contact unit 22 is used to feedback the tripping status of the operating mechanism; the accessory unit usually includes a bracket 20, and the bracket 20 is fixedly installed in the housing near the operating mechanism, that is, the bracket 20 is adjacent to the operating mechanism, and the bracket 20 provides an assembly position for the functional unit, which is conducive to integrating the accessory module 2 into a relatively compact structure for easy assembly.

[0032] like Figure 1 As shown, the improvement of the present application is that the circuit board 3 is fitted and fixed on the bracket 20, and the plane where the circuit board 3 is located is parallel to the connection line from the operating end to the connecting end. In this way, the circuit board 3 and the functional unit are both arranged on the bracket 20, and its structure is compact, which facilitates the assembly of the circuit board 3 and the accessory module 2 in the housing. At the same time, the circuit board 3 is arranged in a direction parallel to the connection direction between the operating end and the wiring terminal, so as to avoid the circuit board 3 occupying too much space and help reduce the volume.

[0033] Specifically, the circuit board 3 can be directly fixed to the bracket 20 by screws to ensure a firm connection between the circuit board 3 and the bracket 20, or the bracket 20 is provided with at least one mounting groove 203, and the circuit board 3 is inserted into the mounting groove 203, which has the advantage of convenient disassembly and assembly, or at least one clip is configured on the bracket 20, and at least one side edge of the circuit board 3 is clipped, which also has the advantage of convenient disassembly and assembly.

[0034] Further, such as Figure 2 , 3As shown, a wiring board 4 is also arranged in the shell, and the wiring board 4 is arranged along at least one outer side of the bracket 20. It can also be understood that the wiring board 4 is arranged between the inner wall of the shell and the outer wall of the bracket 20. The wiring board 4 can be arranged around the bracket 20, or it can only correspond to the outside of one side wall of the bracket 20. A plurality of wire positioning parts 41 are arranged on the wiring board 4. The wiring harness arranged in the circuit breaker can be gathered and routed by the plurality of positioning parts to facilitate wiring and avoid the wiring harness being cluttered inside the circuit breaker, which affects the performance of the circuit breaker. It should be noted that the wiring harness in the circuit breaker includes wires respectively connected to the control module and the accessory module 2, and also includes wires connected between other components, wires between other components and the control module, etc.

[0035] Combination Figure 1-5 A specific embodiment of a plug-in circuit breaker is provided.

[0036] like Figure 1-2 As shown, the plug-in circuit breaker includes a shell, and the two ends of the shell serve as an operating end and a wiring end respectively, wherein an operating hole 111 is opened in the middle of the operating end, and an indication hole may be provided at the operating end on one side of the operating hole 111, and the wiring end is provided with at least a pair of wiring sockets; an operating mechanism is provided inside the shell near the wiring end, and the operating mechanism is connected to a connector, and the connector extends from the operating hole 111 to the outside of the shell for manually driving the operating mechanism. In this embodiment, the shell includes a base 12 and a cover 11 covering the base 12, and an operating hole 111 is provided in the middle of the cover 11, and the operating mechanism is provided between the cover 11 and the base 12 near the cover 11, Figure 2 In the figure, the base 12 includes a first base 121 and a second base 122 assembled with each other. The first base 121 and the second base 122 are assembled along a direction perpendicular to the connection line between the operating end and the wiring terminal. The cover 11 covers the same end of the first base 121 and the second base 122, and a connecting groove connected to the inside of the base 12 is provided in the middle of the same end of the first base 121 and the second base 122. The operating mechanism passes through the connecting groove and cooperates with the circuit breaker pole arranged in the base 12.

[0037] At least one circuit breaker pole is arranged between the operating mechanism and the wiring terminal. In the present embodiment, the circuit breaker pole is assembled in the base 12, and the operating mechanism is drivingly connected to at least one circuit breaker pole. The operating mechanism and the circuit breaker pole can adopt the existing technology. Each circuit breaker pole includes a pair of wiring terminals, a contact mechanism, an arc extinguishing system and a protection mechanism, wherein a pair of wiring terminals corresponds to the wiring sockets arranged in pairs at the wiring terminal, and the contact mechanism is connected between the pair of wiring terminals. The contact mechanism includes a moving contact and a static contact that cooperate with each other. The moving contact is driven by the operating mechanism to contact or separate with the static contact, thereby realizing opening and closing. The arc extinguishing system cooperates with the contact mechanism to extinguish the arc generated when the contact mechanism is disconnected. The protection mechanism includes a short-circuit protection mechanism and / or an overload protection mechanism. When a short-circuit fault occurs, the short-circuit protection mechanism triggers the operating mechanism to trip, and when an overload fault occurs, the overload protection mechanism triggers the operating mechanism to trip.

[0038] A control module and an accessory module 2 are also arranged in the shell, wherein the control module includes a circuit board 3, on which a controller is arranged, and the accessory module 2 is arranged on the side of the base 12 facing the cover 11. Preferably, at least one accessory slot is arranged between the base 12 and the cover 11, and the accessory slot is adjacent to the operating mechanism for assembling the accessory module 2. In this embodiment, at least one accessory slot is arranged on the base 12 on one side of the connecting slot, and the accessory module 2 includes a bracket 20, and the bracket 20 is fixed at the position of the adjacent operating mechanism, that is, the bracket 20 is arranged in the accessory slot and fixedly connected to the base 12, and at least one functional unit is arranged on the bracket 20, and the circuit board 3 is fitted and fixed on the bracket 20, and the plane where the circuit board 3 is located is parallel to the connection line from the operating end to the wiring end, that is, the plane where the circuit board 3 is located is parallel to the side wall of the shell connected between the wiring end and the operating end. In this embodiment, the bracket 20 is provided with a mounting slot 203, and the circuit board 3 is plugged into the mounting slot 203 for easy disassembly and assembly.

[0039] like Figure 3 , 4 As shown, one side of the bracket 20 is provided with an assembly groove for assembling the functional unit, and the installation groove 203 is arranged in parallel with at least part of the side area of ​​the assembly groove, so that the circuit board 3 can be arranged along the side position of the bracket 20, which can not only avoid the circuit board 3 from affecting the assembly of the functional unit, but also facilitate the wiring with other internal components inside the circuit breaker. Preferably, the openings of the assembly groove and the installation groove 203 are both facing the cover 11, which is convenient for assembling the accessory unit and the circuit board 3 from the same direction. At least one positioning rib is also arranged on the cover 11. When the circuit board 3 is installed in the installation groove 203, the positioning rib can cooperate with the circuit board 3 to limit the displacement of the circuit board 3. Of course, the opening of the installation groove 203 can also face away from the cover 11. At this time, the positioning rib can be arranged on the base 12. In addition, the number of the installation grooves 203 can also be set more according to actual needs.

[0040] Combination Figure 4 A bracket 20 structure applied to the present embodiment is provided. As shown in the figure, a mounting groove is provided on one side of the bracket 20. A plurality of partitions 204 are provided in the mounting groove. The partitions 204 divide the space in the mounting groove into a plurality of mutually independent first mounting grooves 201 and second mounting grooves 202. In the figure, the mounting groove is divided into two parallel first mounting grooves 201 and two parallel second mounting grooves 202 by the plurality of partitions 204. The two first mounting grooves 201 and the two second mounting grooves 202 correspond to the two ends of the bracket 20, respectively. Figure 4 In the embodiment, the width of the first assembly groove 201 is greater than the width of the second assembly groove 202, and the groove depth of the first assembly groove 201 is greater than the groove depth of the second assembly groove 202, so that the side of the bracket 20 facing away from the opposite cover 11 is a step surface, and a plurality of matching holes are provided on the side of the bracket 20 facing away from the opposite cover 11. The shape, size and number of the matching holes are not specifically limited, so as to achieve the purpose of making the functional unit match with the operating mechanism or the contact mechanism through the matching holes. In this embodiment, the first assembly groove 201 is used to assemble the shunt trip unit 23, and the two second assembly grooves 202 are used to assemble the auxiliary contact unit 21 and the auxiliary alarm contact unit 22 respectively; a second assembly groove 202 located at the side position is provided with an installation groove 203 on the edge, the width of the installation groove 203 is less than the width of the second assembly groove 202, and the length of the installation groove 203 is equal to the length of the second assembly groove 202, so that the total width of the installation groove 203 and the two second assembly grooves 202 is equal to the total width of the two first assembly grooves 201, so that the outer side of the bracket 20 remains flat. In addition, at least one connecting ear plate is disposed on the outer side of the bracket 20 , and a fixing hole is disposed on the connecting ear plate. A fastener is disposed in the fixing hole to fix the bracket 20 in the attachment slot of the base 12 .

[0041] In this embodiment, the auxiliary contact unit 21 and the auxiliary alarm contact unit 22 respectively include a micro switch and a transmission rod. The transmission rod of the auxiliary contact unit 21 cooperates with the rotating shaft in the contact mechanism. The rotating shaft rotates to drive the transmission rod, thereby triggering the micro switch of the auxiliary contact unit 21. The transmission rod in the auxiliary alarm contact unit 22 cooperates with the operating mechanism. When the operating mechanism is tripped, the transmission rod is driven, thereby triggering the micro switch of the auxiliary alarm contact unit 22. The transmission rods in the auxiliary contact unit 21 and the auxiliary alarm contact unit 22 can pass through the matching holes of the bracket 20 respectively, which is convenient for matching with the contact mechanism and the operating mechanism; the shunt trip unit 23 includes a coil assembly and a tripper. The tripper passes through a matching hole on the bracket 20 to trigger the tripping of the operating mechanism. The coil assembly drives the tripper to work according to the control signal input from the outside. In addition, the accessory module 2 can also be provided with a display screen, which can be arranged in one of the assembly slots. The display screen is correspondingly exposed from the indicator hole next to the operating hole 111 to obtain information on the display screen. The display screen can be connected to an external control device, or the display screen is connected to the control module inside the circuit breaker.

[0042] like Figure 1-3 As shown in FIG. 5 , a wiring board 4 is further disposed in the housing, wherein the wiring board 4 is disposed along at least one outer side of the bracket 20, and a plurality of wire positioning portions 41 are disposed on the wiring board 4, so that the wiring harness is conveniently fixed on the wiring board 4 and the internal wiring is avoided from being messy. Preferably, the wiring board 4 is provided with two rows of wire positioning portions 41 arranged at intervals, and the two rows of wire positioning portions 41 are respectively disposed along both sides of the same surface of the wiring board 4 and are staggered relative to each other, so as to conveniently constrain the direction of the wiring harness.

[0043] Furthermore, the wiring board 4 can surround the bracket 20, or surround two or three adjacent outer walls of the bracket 20, or the wiring board 4 only corresponds to one outer wall of the bracket 20, which can be adjusted according to actual needs.

[0044] In addition, the board surface of the wiring board 4 can be perpendicular to the connecting line between the operating end and the wiring terminal. At this time, one side of the board surface of the wiring board 4 faces the cover 11. At this time, the wire positioning part 41 on the wiring board 4 faces the operating end or the wiring terminal; of course, the board surface of the wiring board 4 can also be parallel to the connecting line between the operating end and the wiring terminal. At this time, the wire positioning part 41 faces the bracket 20, which is convenient for constraining the wire harness to the wire positioning part 41. Preferably, at least part of the area of ​​the wiring board 4 is opposite to the circuit board 3, which is convenient for the wiring harness connected to the circuit board 3 to be constrained on the wiring board 4. One or more wiring boards 4 can be set. When the number of wiring boards 4 is more than two, the board surface of the wiring board 4 may not be parallel to the connection line between the operating end and the wiring terminal.

[0045] In this embodiment, the wiring board 4 is preferably clamped in the shell, that is, a matching clamping groove 42 and a clamping part are provided between the wiring board 4 and the shell. Such a structure has the advantage of convenient disassembly and assembly. Of course, the wiring board 4 and the shell can also be clamped in other ways, or fixed in other ways.

[0046] Combination Figure 2 , 3 5 and 5 provide a wiring board 4 structure applied to this embodiment.

[0047] like Figure 2 , 3 As shown in FIG. 5 , the wiring board 4 is L-shaped as a whole. The wiring board 4 includes two integrally formed plates and one end of the plates is vertically connected. Two rows of wire positioning parts 41 are provided on each plate, and the two rows of wire positioning parts 41 on each plate are arranged along the side positions of the plate, and the wire positioning parts 41 on the same plate are staggered relative to each other; each plate is provided with at least one card slot 42, and the card slot 42 can be engaged with the card engaging part arranged on the shell, so that the wiring board 4 is clamped on the shell, Figure 3 In the figure, a plurality of assembly bosses 120 are provided on the edge of the base 12 close to the cover 11, and a clamping portion is provided on the side of the assembly boss 120 facing the bracket 20, and the clamping portion is also engaged with the clamping groove 42 on the wiring board 4, so that the wiring board 4 is clamped on the housing.

[0048] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0049] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A plug-in circuit breaker, comprising a housing, two ends of the housing are respectively an operating end and a wiring end, an operating mechanism, a control module and an accessory module (2) are arranged in the housing near the operating end, the control module comprises a circuit board (3), the accessory module (2) comprises a bracket (20), the bracket (20) is adjacent to the operating mechanism and is provided with at least one functional unit, characterized in that: The circuit board (3) is fitted and fixed on the bracket (20), and the plane where the circuit board (3) is located is parallel to the connection line from the operating end to the wiring end.

2. The plug-in circuit breaker according to claim 1, characterized in that: The bracket (20) is provided with at least one mounting groove (203), and the circuit board (3) is inserted into the mounting groove (203).

3. The plug-in circuit breaker according to claim 2, characterized in that: One side of the bracket (20) is provided with an assembly groove for assembling the functional unit, and the installation groove (203) is arranged in parallel with at least a part of the side area of ​​the assembly groove.

4. The plug-in circuit breaker according to claim 3, characterized in that: A partition plate (204) for separating functional units is arranged in the assembly groove.

5. The plug-in circuit breaker according to claim 1, characterized in that: The bracket (20) is provided with at least one buckle, and at least one side edge of the circuit board (3) is buckled by the buckle.

6. The plug-in circuit breaker according to any one of claims 1 to 5, characterized in that: The housing comprises a base (12) and a cover (11) covering the base (12); the cover (11) is provided with an operating hole (111); an operating member connected to an operating mechanism passes through the operating hole (111); the bracket (20) is fixed to a side of the base (12) facing the cover (11); and the cover (11) is provided with at least one positioning rib for limiting the position of the circuit board (3).

7. The plug-in circuit breaker according to claim 1, characterized in that: It also includes a wiring board (4), which is arranged in the housing along at least one outer side of the bracket (20), and the wiring board (4) is provided with a plurality of wire positioning portions (41).

8. The plug-in circuit breaker according to claim 7, characterized in that: The wiring board (4) is clamped in the housing, and at least a part of the wiring board (4) is opposite to the circuit board (3).

9. The plug-in circuit breaker according to claim 8, characterized in that: The plane where the wiring board (4) is located is perpendicular to the line between the operating end and the wiring end, and the wire positioning portion (41) faces the operating end or the wiring end; and / or the plane where the wiring board (4) is located is parallel to the line between the operating end and the wiring end, and the wire positioning portion (41) faces the bracket (20); The wiring board (4) is provided with two rows of wire positioning parts (41) arranged at intervals, and the two rows of wire positioning parts (41) are respectively arranged along two sides of the same surface of the wiring board (4) and are staggered and opposite to each other.

10. The plug-in circuit breaker according to claim 1, characterized in that: The functional unit is at least one of an auxiliary contact unit (21), an auxiliary alarm contact unit (22) and a shunt trip unit (23).

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