Molded case circuit breaker

Abstract

The present invention discloses a molded case circuit breaker, comprising a shell, a cavity inside the shell, at least three contact assemblies and an operating mechanism arranged in sequence in the cavity, the operating mechanism is connected to an operating handle, the operating mechanism is correspondingly arranged above the contact assembly located in the middle position, the two ends of the shell are provided with wiring terminals, the inside of the cavity is provided with two circuit board installation cavities at the two sides corresponding to the operating mechanism, the two circuit board installation cavities are respectively correspondingly arranged above the other two contact assemblies, one end of the shell is provided with a mounting groove, the mounting groove is correspondingly arranged above the wiring terminal and is simultaneously located at the same side position of the two circuit board installation cavities, and a connection assembly that is conductively plugged in with a wireless communication module is arranged in the mounting groove. The internal structure layout of the present invention is more reasonable and compact, and it is convenient for the disassembly, assembly and replacement of the wireless communication module.

Description

Technical Field

[0001] The invention relates to a molded case circuit breaker. Background Art

[0002] Existing intelligent molded case circuit breakers usually include a shell, a cavity is arranged inside the shell, and a contact assembly, an operating mechanism linked to the contact assembly, an operating handle extending to the outside of the cavity, and a number of circuit boards and wireless communication modules that cooperate with the contact assembly to realize the data sampling, processing, control, basic protection and other functions of the circuit breaker. Due to the limitation of the internal space of the cavity, it is difficult to install these components in the cavity without affecting the overall volume of the molded case circuit breaker, which makes the overall volume of the molded case circuit breaker larger and has higher requirements for the installation environment. In order to facilitate the disassembly and assembly of the wireless communication module, some existing molded case circuit breaker products will use an external method to connect the wireless communication module to the molded case circuit breaker, but the disassembly and assembly process is more troublesome and easily causes problems such as line interference and entanglement. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a molded case circuit breaker, the internal structure layout of which is more reasonable and compact, and the disassembly, assembly and replacement of the wireless communication module can be facilitated.

[0004] To achieve the above-mentioned purpose, the present invention provides a molded case circuit breaker, comprising a shell, a cavity on the inner side of the shell, at least three contact assemblies and an operating mechanism connected to the contact assemblies are arranged in sequence in the cavity, the operating mechanism is connected to an operating handle that passes through the top of the shell, the operating mechanism is correspondingly arranged above the contact assembly located in the middle position, both ends of the shell are provided with wiring terminals that are connected to the contact assembly, two circuit board mounting cavities that can be used to accommodate circuit boards are arranged at the two side positions of the inner side of the cavity corresponding to the operating mechanism, the two circuit board mounting cavities are respectively correspondingly arranged at the upper positions of the other two contact assemblies, one end of the shell is provided with a mounting groove for accommodating a wireless communication module, the mounting groove is correspondingly arranged at the upper position of the wiring terminal and is simultaneously located at the same side position of the two circuit board mounting cavities, and a connecting assembly that is conductively plugged in with the wireless communication module is arranged in the mounting groove.

[0005] The beneficial effects of the present invention are as follows: two circuit board installation cavities are arranged at the two side positions of the cavity corresponding to the operating mechanism and are respectively arranged at the upper positions of the other two contact assemblies, and the installation groove is arranged at one end position of the shell and is correspondingly arranged above the wiring terminal, so that the redundant internal space of the shell can be fully utilized, so that the contact assembly, operating mechanism, operating handle, several circuit boards for realizing data sampling, processing, control, basic protection and other functions of the circuit breaker, wireless communication module, etc. of the molded case circuit breaker can be reasonably arranged and installed on the molded case circuit breaker, with little change to the overall volume of the molded case circuit breaker, and these components can produce a good isolation effect, thereby improving the stability of the molded case circuit breaker during operation, and the wireless communication module can be connected to the circuit board of the current, voltage and other data sampling module in the shell through the connecting component in the installation groove, so as to facilitate the disassembly and assembly of the wireless communication module.

[0006] Furthermore, the shell is composed of a base, a middle base and an upper cover which are spliced ​​in sequence, the contact assembly is arranged between the base and the middle base, a first notch for accommodating an operating mechanism is arranged in the middle of the middle base, a second notch for passing an operating handle is arranged in the middle of the upper cover, two first grooves are arranged on both sides of the upper part of the middle base corresponding to the first notch, two second grooves corresponding to the first grooves are arranged at the lower part of the upper cover, the circuit board installation cavity is composed of the first groove and the second groove, and the installation groove is composed of the third groove at one end of the upper cover and the fourth groove at one end of the middle base.

[0007] The advantages brought by the further arrangement are: the shell adopts a three-layer splicing structure, which is convenient for the production and processing of the shell parts. During assembly, the components on the inner side of the shell can be installed in sequence along the splicing order of the base, the middle seat and the upper cover. The first groove and the second groove can form the circuit board installation cavity when spliced ​​together, and the third groove and the fourth groove can form the installation groove when spliced ​​together. The overall installation process is simple and convenient, which can improve the production and assembly efficiency.

[0008] Furthermore, at least two circuit boards are arranged in a longitudinally spaced relationship in the circuit board installation cavity.

[0009] The advantage brought by the further arrangement is that more circuit boards can be accommodated in the circuit board installation cavity, and these circuit boards are arranged in a longitudinally spaced arrangement so that adjacent circuit boards are not easily interfered with each other.

[0010] Furthermore, the first groove and / or the second groove are provided with protruding columns for respectively cooperating with these circuit boards for supporting and positioning.

[0011] The advantage brought by the further arrangement is that the convex columns can respectively cooperate with the circuit boards to support and position them, so that the circuit boards in the circuit board installation cavity are not easy to shake, and can ensure that the circuit boards are in a state of isolation from each other, thereby reducing interference between the circuit boards.

[0012] Furthermore, the connection assembly includes at least two first connectors that can be respectively matched with different standard wireless communication modules for conductive plugging.

[0013] The advantage brought by the further setting is that at least two wireless communication modules of different standards can be installed through the first connector on the connecting component, so that at least two wireless communication modules of different standards can be adapted to the same molded case circuit breaker product, thereby improving the applicability of the product and reducing the cost of use.

[0014] Furthermore, the connection component is detachably arranged in the installation groove, and the connection component also includes a second connector, and a third connector that cooperates with the second connector for conductive plugging is arranged on the inner side of the installation groove.

[0015] The advantage of adopting the above arrangement is that it is convenient for disassembly, assembly, maintenance and replacement of the connection components.

[0016] Furthermore, one end of the mounting groove corresponding to the shell has a side notch for inserting the connecting component, and the inner side wall of the mounting groove corresponding to the side notch is provided with at least two through holes respectively connected to the two circuit board mounting cavities, and the third connector is arranged on the circuit board accommodated in the circuit board mounting cavity and passed through the through hole.

[0017] The advantages of adopting the above-mentioned setting are: the setting of the side groove can increase the capacity of the installation groove as much as possible, the connection component can be loaded into or taken out of the installation groove along the side groove, and it also facilitates the plug-in connection between the second connector and the third connector. The third connector is arranged on the circuit board accommodated in the circuit board installation cavity, which facilitates the simultaneous installation of the third connector.

[0018] Furthermore, a first positioning hole penetrating to the bottom of the housing is provided on the bottom inner wall of the mounting groove, and a second positioning hole aligned with the first positioning hole is provided on the connecting assembly.

[0019] The advantage of adopting the above arrangement is that screws can be inserted into the first positioning hole and the second positioning hole, which not only facilitates the installation and fixation of the entire molded case circuit breaker, but also can fix the connection component and the housing together, thereby improving the reliability of the connection.

[0020] Furthermore, a cover plate is rotatably provided at the notch of the mounting slot.

[0021] The advantage of adopting the above arrangement is that the cover plate can cover the wireless communication module, thereby isolating and protecting the wireless communication module.

[0022] Furthermore, a third positioning hole is provided on the cover plate, and the connecting component includes a fourth positioning hole that is connected and matched with the third positioning hole.

[0023] The advantage of adopting the above arrangement is that the cover plate and the connection assembly can be fixedly connected together by inserting screws through the third positioning hole and the fourth positioning hole to prevent the cover plate from being opened, and the connection assembly and the housing can also be connected and positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural diagram of an embodiment of the present invention;

[0025] Figure 2 This is a disassembly diagram of the upper cover of an embodiment of the present invention;

[0026] Figure 3 This is a diagram of disassembling and assembling a circuit board in a second groove according to an embodiment of the present invention;

[0027] Figure 4 This is a diagram of disassembling and assembling a circuit board in a first groove according to an embodiment of the present invention;

[0028] Figure 5 It is a transverse cross-sectional view of the position of the circuit board installation cavity corresponding to the embodiment of the present invention.

[0029] Figure 6 The invention relates to the disassembly and assembly of the connection assembly in the installation slot of the embodiment of the present invention;

[0030] Figure 7 Decomposition of the connection assembly of the embodiment of the present invention Figure 1 ;

[0031] Figure 8 Decomposition of the connection assembly of the embodiment of the present invention Figure 2 ;

[0032] Fig. 9 is a transverse cross-sectional view of the corresponding installation slot position of an embodiment of the present invention;

[0033] Fig.10 A longitudinal cross-sectional view of a corresponding mounting groove position of an embodiment of the present invention;

[0034] Fig.11 This is a schematic diagram of a cover body in an open state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The embodiment of the molded case circuit breaker of the present invention is as follows Figure 1-11As shown: it includes a shell 1, and the inner side of the shell 1 has a cavity 10, and three contact assemblies 2 and an operating mechanism 3 connected and matched with the contact assemblies 2 are arranged in sequence in the cavity 10, and the operating mechanism 3 is connected to an operating handle 4 that is inserted into the upper part of the shell 1, and the three contact assemblies 2 can be driven by the operating handle 4 to realize the opening and closing actions, and the operating mechanism 3 is correspondingly arranged above the contact assembly 2 located in the middle position among the three contact assemblies 2, and the operating mechanism 3 plays a linkage role between the contact assembly 2 and the operating handle 4, and the two ends of the shell 1 are provided with wiring terminals 5 that are matched and connected with the three contact assemblies 2, and two circuit board installation cavities 11 that can be used to accommodate the circuit board 6 are arranged at the two sides of the inner side of the cavity 10 corresponding to the operating mechanism 3, and the two circuit board installation cavities 11 are respectively arranged at the upper positions of the other two contact assemblies 2 (such as Figure 5 As shown in the figure, the circuit board 6 can be used to cooperate with the contact assembly 2 to realize the data sampling, processing, control or basic protection functions of the circuit breaker (such as metering and leakage protection functions). One end of the shell 1 is provided with a mounting groove 12 for accommodating the wireless communication module 7. The mounting groove 12 is correspondingly arranged above the wiring terminal 5 and is simultaneously located on the same side of the two circuit board mounting cavities 11. A connecting component 8 that is conductively plugged in with the wireless communication module 7 is arranged in the mounting groove 12. The electrical connection between the wireless communication module 7 and the current, voltage and other data sampling module arranged on the inner side of the molded case circuit breaker shell 1 can be realized through the connection and cooperation with the connecting component 8.

[0036] The housing 1 is composed of a base 13, a middle base 14 and an upper cover 15 which are spliced ​​in sequence. The contact assembly 2 is arranged between the base 13 and the middle base 14. The contact assembly 2 adopts a modular design, which can further save the internal space of the cavity 10. A first notch 141 for accommodating the operating mechanism 3 is arranged in the middle of the middle base 14, and a second notch 151 for passing the operating handle 4 is arranged in the middle of the upper cover 15. Two first grooves 142 are arranged on both sides of the upper part of the middle base 14 corresponding to the first notch 141, and two second grooves 152 corresponding to the first grooves 142 are arranged at the lower part of the upper cover 15. The circuit board installation cavity 11 is composed of the first groove 142 and the second groove 152, and the installation groove 12 is composed of the third groove 153 at one end of the upper cover 15 and the fourth groove 143 at one end of the middle base 14.

[0037] In the two circuit board installation cavities 11, two circuit boards 6 are accommodated in one circuit board installation cavity 11, and three circuit boards 6 are accommodated in the other circuit board installation cavity 11. The circuit boards 6 in the same circuit board installation cavity 11 are arranged in a longitudinally spaced arrangement. The circuit board 6 located at the top of the circuit board installation cavity 11 cooperates with the protrusion 16 arranged in the second groove 152 for support and positioning. The circuit board 6 located in the middle and the bottom of the circuit board installation cavity 11 cooperates with the protrusion 16 arranged in the first groove 142 for support and positioning. The protrusions 16 of different heights can be configured in the first groove 142, so that the two circuit boards 6 located in the first groove 142 and the circuit boards 6 in the first groove 142 and the circuit boards 6 in the second groove 152 can maintain a state of being spaced from each other. The protrusions 16 are hole columns, and the circuit board 6 can be locked and positioned at the end of the protrusions 16 by screws.

[0038] The connecting component 8 includes at least two types of first connectors 81 that can be conductively plugged into wireless communication modules 7 of different standards. When wireless communication modules 7 of different standards are installed in the installation groove 12, they are connected to the first connectors 81 of the corresponding type, thereby improving the adaptability to wireless communication modules 7 of different standards. The installation groove 12 using the above structure has a larger capacity and can be used to accommodate wireless communication modules 7 of different sizes.

[0039] The connecting component 8 is detachably arranged in the installation groove 12, and the connecting component 8 also includes a second connecting head 82. The inner side of the installation groove 12 is provided with a third connecting head 61 that cooperates with the second connecting head 82 for conductive plugging, so as to facilitate the disassembly and assembly of the connecting component 8 and the electrical connection with the inner components of the outer shell 1. In addition to being able to establish an electrical connection between the wireless communication module 7 and the current, voltage and other data sampling modules inside the outer shell 1, the connecting component 8 can also play the role of an "adapter" to improve the compatibility with wireless communication modules 7 of different standards.

[0040] The connecting assembly 8 includes a PCB board 83 and a base 84 connected to each other. The PCB board 83 is installed and fixed at the bottom of the base 84. The first connector 81 and the second connector 82 are both welded and fixed on the PCB board 83 and connected through the integrated circuit on the PCB board 83.

[0041] The mounting groove 12 has a side notch 121 at one end of the housing 1 for inserting the connecting component 8. Two through holes 122 respectively connected to the two circuit board mounting cavities 11 are arranged on the inner side wall of the mounting groove 12 corresponding to the side notch 121. The third connector 61 is welded and fixed on the circuit board 6 accommodated in the circuit board mounting cavity 11 and is penetrated in the through hole 122 along the through hole 122. The third connector 61 can be inserted into the through hole 122 while installing and positioning the circuit board 6. The conductive plugging direction of the second connector 82 and the third connector 61 is consistent with the plugging direction of the connecting component 8 along the side notch 121. The conductive plugging of the second connector 82 and the third connector 61 can be realized while the connecting component 8 is inserted into the mounting groove 12 along the side notch 121, so that disassembly and assembly are convenient.

[0042] The installation slot 12 is located above the wiring terminal 5. When the wiring terminal 5 is installed, the wireless communication module 7 and the connection component 8 can be removed from the installation slot 12 first, which is convenient for the wiring installation of the wires at the wiring terminal 5 and is not easy to cause interference.

[0043] The bottom inner wall of the mounting groove 12 is provided with a first positioning hole 123 which penetrates to the bottom of the housing 1, and the connecting component 8 is provided with a second positioning hole 85 which is aligned with the first positioning hole 123. When the screw is penetrated through the first positioning hole 123 and the second positioning hole 85, the housing 1 and the connecting component 8 as well as the overall installation positioning of the molded case circuit breaker can be simultaneously positioned. The first positioning hole 123 and the second positioning hole 85 are arranged there and cooperated with the screw positioning at the other end of the housing 1 to improve the stability of the overall installation positioning of the molded case circuit breaker.

[0044] The installation slot 12 further has an upper slot 124 , at which a cover plate 17 is rotatably disposed. The cover plate 17 can cover the wireless communication module 7 accommodated in the installation slot 12 to improve its stability during operation.

[0045] The cover plate 17 is provided with a third positioning hole 171, and the connecting component 8 includes a fourth positioning hole 841 that cooperates with the third positioning hole 171. The connection and positioning between the cover plate 17 and the connecting component 8 can be achieved by screws inserted through the third positioning hole 171 and the fourth positioning hole 841.

[0046] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A molded case circuit breaker, comprising a housing, a cavity inside the housing, at least three contact assemblies and an operating mechanism connected to the contact assemblies are arranged in sequence in the cavity, the operating mechanism is connected to an operating handle penetrating the upper part of the housing, the operating mechanism is correspondingly arranged above the contact assembly located in the middle position, and the two ends of the housing are provided with wiring terminals connected to the contact assembly, characterized in that: Two circuit board mounting cavities for accommodating circuit boards are arranged on both sides of the inner side of the cavity corresponding to the operating mechanism, and the two circuit board mounting cavities are arranged respectively and correspondingly above the other two contact assemblies, and one end of the shell is provided with a mounting groove for accommodating the wireless communication module, and the mounting groove is arranged correspondingly above the wiring terminal and is located at the same side of the two circuit board mounting cavities, and a connecting component that is electrically connected with the wireless communication module is arranged in the mounting groove; the connecting component includes at least two first connectors that can be electrically connected with different standard wireless communication modules respectively; the connecting component is detachably arranged in the mounting groove, and the connecting component also includes A second connector, a third connector that is electrically connected to and plugs into the second connector is disposed on the inner side of the mounting groove; the mounting groove has a side notch at one end of the housing corresponding to the side notch for inserting a connecting component, and at least two through holes that are respectively connected to the two circuit board mounting cavities are disposed on the inner side wall of the mounting groove corresponding to the side notch, and the third connector is configured on the circuit board accommodated in the circuit board mounting cavity and is inserted into the through holes; the connecting component includes a PCB board and a base connection that are interconnected, the PCB board is fixedly mounted on the bottom of the base, and the first connector and the second connector are both welded and fixed on the PCB board and connected through an integrated circuit on the PCB board.

2. The molded case circuit breaker according to claim 1, characterized in that: The shell is composed of a base, a middle base and an upper cover which are spliced ​​in sequence; the contact assembly is arranged between the base and the middle base; a first notch for accommodating an operating mechanism is arranged in the middle of the middle base; a second notch for passing an operating handle is arranged in the middle of the upper cover; two first grooves are arranged at both sides of the upper part of the middle base corresponding to the first notch; two second grooves corresponding to the first grooves are arranged at the lower part of the upper cover; the circuit board installation cavity is composed of the first groove and the second groove; and the installation groove is composed of the third groove at one end of the upper cover and the fourth groove at one end of the middle base.

3. The molded case circuit breaker according to claim 2, characterized in that: At least two circuit boards are arranged in a longitudinally spaced relationship in the circuit board installation cavity.

4. The molded case circuit breaker according to claim 3, characterized in that: The first groove and / or the second groove are provided with convex columns for respectively cooperating with the circuit boards for support and positioning.

5. The molded case circuit breaker according to claim 1, characterized in that: The bottom inner wall of the mounting groove is provided with a first positioning hole penetrating to the bottom of the shell, and the connecting component is provided with a second positioning hole aligned with the first positioning hole.

6. The molded case circuit breaker according to claim 1, characterized in that: A cover plate is rotatably arranged at the notch of the installation slot.

7. The molded case circuit breaker according to claim 6, characterized in that: The cover plate is provided with a third positioning hole, and the connecting component includes a fourth positioning hole that is connected and matched with the third positioning hole.

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