A circuit breaker

Abstract

The application relates to a circuit breaker, belonging to the technical field of low-voltage electrical appliances. The circuit breaker comprises a base, a middle cover, a mutual inductor module, a controller module and a function module; the middle cover is arranged on the base, the middle cover is provided with a first cavity and a second cavity which are isolated from each other, and at least one function module is detachably assembled in the first cavity; the mutual inductor module and the controller module are detachably assembled in the second cavity, and the mutual inductor module and the controller module are electrically connected through a separable connection structure; the controller module comprises a shell, a magnetic flux tripping device is arranged in the shell, the magnetic flux tripping device can be driven to trigger a tripping action, and the circuit breaker is tripped. The above-mentioned circuit breaker can improve the utilization rate of the interface space of the standard accessory, and improves the reliability, use flexibility and function diversity of the circuit breaker.

Description

Technical Field

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

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. Traditionally, mechanical circuit breakers are used to achieve overload, short circuit, and leakage protection. With the development of smart switches for the Internet of Things (IoT), controllers have been added to circuit breakers to realize electronic smart circuit breakers to meet the needs of IoT applications in multiple scenarios.

[0003] Existing intelligent circuit breakers integrate the controller with the mechanical mechanism, making it impossible to replace the controller separately in case of failure, thus reducing the reliability of the circuit breaker. At the same time, existing circuit breakers usually pre-install the magnetic trip unit in the circuit breaker's accessory cavity, occupying the interface space of standard accessories, which prevents customers from freely selecting other functional modules, reducing the flexibility and functional diversity of the circuit breaker. Utility Model Content

[0004] The purpose of this utility model is to provide a circuit breaker that can improve the utilization rate of interface space of standard accessories, and enhance the reliability, flexibility of use and versatility of the circuit breaker.

[0005] The embodiments of this utility model are implemented as follows:

[0006] In one aspect, this utility model provides a circuit breaker, including a base, a middle cover, a current transformer module, a controller module, and a functional module; the middle cover is disposed on the base, and the middle cover has a first cavity and a second cavity that are isolated from each other, and at least one functional module is detachably assembled in the first cavity; the current transformer module and the controller module are detachably assembled in the second cavity, and the current transformer module and the controller module are electrically connected through a separable connection structure; the controller module includes a housing, and a magnetic flux trip device is provided in the housing, which can be triggered by a drive to trip and open the circuit breaker.

[0007] Optionally, the detachable connection structure includes a first plug portion disposed on the current transformer module and a second plug portion disposed on the controller module; the first plug portion and the second plug portion are electrically connected when axially plugged in.

[0008] Optionally, the housing includes a front housing, a rear housing, and a controller cover. The front housing and the rear housing are fastened together to form a receiving cavity for accommodating the flux trip device. The receiving cavity has openings on opposite sides. The controller cover and the PCB board can be respectively covered on the two openings and connected to the front housing and the rear housing.

[0009] Optionally, the first insertion part is a female connector, and the second insertion part is a male pin that matches the female connector. The insertion direction of the female connector and the male pin is parallel to the depth direction of the second cavity.

[0010] Optionally, the rear housing has a battery compartment for housing a battery pack.

[0011] Optionally, the flux trip unit includes a drive unit and a push rod mechanism that are driven together; the front housing has a through hole through which the push rod mechanism extends to the outside of the housing; the circuit breaker also includes a contact system and a traction rod that are driven together, and the electromagnetic drive unit can be driven to move the push rod mechanism toward the traction rod and push the traction rod to open the contact system.

[0012] Optionally, the electromagnetic drive unit includes a permanent magnet and an assist spring, and the push rod mechanism is driven by the permanent magnet through the assist spring.

[0013] Optionally, the traction rod is pivotally disposed within the first cavity; the circuit breaker also includes an operating mechanism, which is connected to the contact system in a transmission manner. The operating mechanism can drive the contact system to close and drive the push rod mechanism to reset.

[0014] Optionally, the sidewall of the battery compartment has a first contact piece and a second contact piece, which are respectively disposed on opposite sides of the battery pack; the first contact piece and the second contact piece are electrically connected to the PCB board.

[0015] Optionally, the circuit breaker also includes a front cover that covers the side of the middle cover facing away from the base.

[0016] The beneficial effects of this utility model include:

[0017] This application provides a circuit breaker, including a base, a middle cover, a current transformer module, a controller module, and functional modules. The middle cover is disposed on the base and has a first cavity and a second cavity that are isolated from each other. At least one functional module is detachably assembled in the first cavity, allowing customers to select different functional modules according to their needs, thus improving the functional versatility of the circuit breaker. The current transformer module and the controller module are detachably assembled in the second cavity, facilitating replacement and maintenance, improving the reliability of the circuit breaker. The current transformer module and the controller module are electrically connected through a separable connection structure. The controller module includes a housing, within which a flux trip unit is installed. The flux trip unit can be triggered by a drive to trip, causing the circuit breaker to open. This arrangement allows the flux trip unit to not occupy the interface space of standard accessories, increasing the space available for functional modules within the first cavity. The aforementioned circuit breaker improves the utilization rate of the interface space of standard accessories, enhancing the reliability, operational flexibility, and functional versatility of the circuit breaker. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 One of the schematic diagrams of the circuit breaker provided in the embodiment of this utility model;

[0020] Figure 2 This is the second schematic diagram of the circuit breaker provided in the embodiment of the present utility model;

[0021] Figure 3 The third schematic diagram of the circuit breaker provided in this embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the controller module of the circuit breaker provided in this embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the magnetic flux trip unit of the circuit breaker provided in this embodiment of the utility model;

[0024] Figure 6 A schematic diagram of the rear housing of the controller module provided in an embodiment of this utility model.

[0025] Icons: 100-Circuit breaker; 110-Base; 110a-Middle cover; 111-First cavity; 112-Second cavity; 120-Inductor module; 121-First plug-in part; 130-Controller module; 131-Housing; 1311-Front housing; 1311a-Through hole; 1312-Rear housing; 1313-Controller cover; 1314-Battery compartment; 1314a-First contact piece; 1314b-Second contact piece; 132-Second plug-in part; 140-Magnetic flux trip unit; 141-Push rod mechanism; 141a-Protrusion; 141b-Pressure groove; 142-Electromagnetic drive unit; 143-Assist spring; 150-PCB board; 160-Traction rod. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0030] Please refer to Figure 1 and Figure 2 This embodiment provides a circuit breaker 100, including a base 110, a middle cover 110a, a current transformer module 120, a controller module 130, and functional modules. The middle cover 110a is disposed on the base 110 and has a first cavity 111 and a second cavity 112 that are isolated from each other. At least one functional module is detachably assembled in the first cavity 111. The current transformer module 120 and the controller module 130 are detachably assembled in the second cavity 112, and the current transformer module 120 and the controller module 130 are electrically connected through a separable connection structure. The controller module 130 includes a housing 131, and a magnetic flux trip unit 140 is provided in the housing 131. The magnetic flux trip unit 140 can be triggered by a drive to trip, causing the circuit breaker 100 to open.

[0031] Specifically, such as Figure 1 and Figure 2As shown, the circuit breaker 100 includes a base 110 and a middle cover 110a. The middle cover 110a has a first cavity 111 and a second cavity 112 that are isolated from each other to achieve electrical insulation. The first cavity 111 is a functional module cavity, and the functional modules include a variety of optional configurations, such as auxiliary modules, alarm modules, undervoltage shunt modules, etc. Customers can select and assemble them according to their actual needs to improve the flexibility and versatility of the circuit breaker 100.

[0032] The second cavity 112 is used to house the current transformer module 120 and the controller module 130. The current transformer module 120 collects the main circuit current data in real time through a coil or iron core current transformer and transmits the data information to the controller module 130. When the controller module 130 detects a fault current, it can send a drive signal to the flux trip unit 140 through an electrical connection to trip the circuit breaker 100.

[0033] Existing circuit breakers typically house the flux trip unit within the circuit breaker's accessory cavity (i.e., within the first cavity 111 of this application), thus occupying space for functional modules. To address this issue, the controller module 130 of this application includes a housing 131, such as... Figure 4 As shown, the flux trip unit 140 is disposed within the housing 131 of the controller module 130, while the controller module 130 is detachably disposed within the second cavity 112. This arrangement allows the flux trip unit 140 to be removed along with the controller module 130, facilitating the replacement and maintenance of both components. Furthermore, the placement of the flux trip unit 140 does not occupy space within the functional modules, making the circuit breaker 100 more versatile and flexible in its design.

[0034] It should be noted that, in one possible implementation of this application, firstly, as... Figure 1 and Figure 3 As shown, the detachable connection structure includes a first plug-in portion 121 disposed on the current transformer module 120 and a second plug-in portion 132 disposed on the controller module 130; the first plug-in portion 121 and the second plug-in portion 132 are electrically connected when axially plugged in. When either the current transformer module 120 or the controller module 130 fails, technicians do not need to perform complex disassembly of the entire circuit breaker 100, but only need to use the detachable connection structure to quickly remove the faulty module for repair or replacement.

[0035] Optionally, the first insertion part 121 is a female connector, and the second insertion part 132 is a male pin that matches the female connector. The insertion direction of the female connector and the male pin is parallel to the depth direction of the second cavity 112, so as to facilitate the electrical connection and plugging / unplugging of the current transformer module 120 and the controller module 130.

[0036] Second, such as Figure 1 As shown, the circuit breaker 100 also includes a front cover (not shown in the figure), which covers the side of the middle cover 110a opposite to the base 110 and can protect the controller module 130 and the functional modules, thereby further improving the service life of the circuit breaker 100.

[0037] The circuit breaker 100 provided in this application includes a base 110, a middle cover 110a, a current transformer module 120, a controller module 130, and functional modules. The middle cover 110a is disposed on the base 110 and has a first cavity 111 and a second cavity 112 that are isolated from each other. At least one functional module is detachably assembled in the first cavity 111, allowing customers to select different functional modules according to their needs, thereby improving the functional versatility of the circuit breaker 100. The current transformer module 120 and the controller module 130 are detachably assembled in the second cavity. The circuit breaker 100 is easily replaceable and maintained within the housing 112, improving its reliability. The current transformer module 120 and controller module 130 are electrically connected via a detachable connection structure. The controller module 130 includes a housing 131, within which a flux trip unit 140 is installed. The flux trip unit 140 can be triggered to trip, causing the circuit breaker 100 to open. This design allows the flux trip unit 140 to not occupy interface space in standard accessories, increasing the selection space for functional modules within the first cavity 111. The aforementioned circuit breaker 100 improves the utilization rate of interface space in standard accessories, enhancing its reliability, operational flexibility, and functional versatility.

[0038] In one possible implementation of this application, such as Figure 4 As shown, the housing 131 includes a front housing 1311, a rear housing 1312, and a controller cover 1313. The front housing 1311 and the rear housing 1312 are fastened together to form a receiving cavity for accommodating the magnetic flux trip device 140. The receiving cavity has openings on opposite sides. The controller cover 1313 and the PCB board 150 can be respectively covered by the two openings and connected to the front housing 1311 and the rear housing 1312.

[0039] Specifically, such as Figure 4 As shown, the housing 131 includes a receiving cavity formed by the fastening of the front housing 1311 and the rear housing 1312. A PCB board 150 is provided at the bottom of the receiving cavity. A magnetic flux trip device 140 is electrically connected above the PCB board 150. The controller module 130 can control the tripping of the magnetic flux trip device 140 through the PCB board 150. An opening is provided on one side of the receiving cavity. The opening is covered by a controller cover 1313 so that the magnetic flux trip device 140 is located in the closed cavity, thereby protecting the PCB board 150 and the magnetic flux trip device 140.

[0040] For example, such as Figure 6 As shown, a battery compartment 1314 is also provided inside the housing 131. The battery compartment 1314 is located in the rear housing 1312 and is used to house the battery pack. The battery pack serves as a secondary power source, ensuring the controller module 130 continues to operate even when the main power supply is interrupted, thus recording the time and cause of the fault and further improving the safety of the circuit breaker 100. Furthermore, this arrangement also improves the space utilization of the circuit breaker 100.

[0041] Furthermore, such as Figure 6 As shown, the sidewall of the battery compartment 1314 has a first contact piece 1314a and a second contact piece 1314b, which are respectively disposed on opposite sides of the battery pack. When the battery pack is disposed in the battery compartment 1314, its left and right sides are respectively clamped by the first contact piece 1314a and the second contact piece 1314b, which improves the stability of the battery pack. The first contact piece 1314a and the second contact piece 1314b are electrically connected to the PCB board 150, realizing the electrical connection between the battery pack and the PCB board 150.

[0042] For example, such as Figure 5 As shown, the flux trip unit 140 includes an electromagnetic drive unit 142 and a push rod mechanism 141 that are connected in a transmission manner; the front housing 1311 has a through hole 1311a, and the push rod mechanism 141 extends from the through hole 1311a to the outside of the housing 131; the circuit breaker 100 also includes a contact system and a traction rod 160 that are connected in a transmission manner, and the electromagnetic drive unit 142 can be driven to move the push rod mechanism 141 toward the traction rod 160 and push the traction rod 160 to open the contact system.

[0043] Specifically, such as Figure 5 As shown, the magnetic flux trip unit 140 includes an electromagnetic drive unit 142 and a push rod mechanism 141 connected by a transmission connection. The electromagnetic drive unit 142 is equipped with a permanent magnet, a ferromagnetic body, and an electromagnetic coil. The push rod mechanism 141 is driven by the permanent magnet through a booster spring 143.

[0044] like Figure 5 As shown, the assist spring 143 consists of two springs, one large and one small, nested together. In steady-state operation, the permanent magnet and the ferromagnetic material attract to form a closed magnetic circuit, and the assist spring 143 is compressed and stores energy under the pressure of the push rod mechanism 141. When an abnormal current is detected, the electromagnetic coil is energized to demagnetize the permanent magnet. At this time, the permanent magnet no longer attracts the ferromagnetic material, and the push rod mechanism 141 no longer provides pressure to the assist spring 143, causing the previously compressed assist spring 143 to release energy. This drives the push rod mechanism 141 to move towards the traction rod 160 and pushes the traction rod 160, thus tripping the circuit breaker 100. This ensures a stable output of thrust and enhances the reliability and stability of the tripping action.

[0045] The traction rod 160 is pivotally disposed within the first cavity 111; the circuit breaker 100 also includes an operating mechanism, which is connected to the contact system in a transmission manner. The operating mechanism can drive the contact system to close and drive the push rod mechanism 141 to reset.

[0046] The push rod mechanism 141 has a protrusion 141a on the side wall and a pressure groove 141b at the top. When the push rod mechanism 141 is driven by the assist spring 143 to extend from the through hole 1311a to the outside of the housing 131, the protrusion 141a can abut against the traction rod 160 and push the traction rod 160 to open the circuit breaker 100. At the same time, after the abnormal current disappears, during the reclosing process, the lever of the operating mechanism moves toward the push rod mechanism 141 and presses down the pressure groove 141b of the push rod mechanism 141 to drive the push rod mechanism 141 to reset, which increases the flexibility and convenience of operation.

[0047] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A circuit breaker, characterized in that, The circuit breaker includes a base (110), a middle cover (110a), a current transformer module (120), a controller module (130), and a functional module. The middle cover (110a) is disposed on the base (110) and has a first cavity (111) and a second cavity (112) that are isolated from each other. At least one of the functional modules is detachably assembled in the first cavity (111). The current transformer module (120) and the controller module (130) are detachably assembled in the second cavity (112), and the current transformer module (120) and the controller module (130) are electrically connected through a separable connection structure. The controller module (130) includes a housing (131) and a magnetic flux trip device (140) is provided in the housing (131). The magnetic flux trip device (140) can be triggered by a drive to trip, causing the circuit breaker (100) to open.

2. The circuit breaker according to claim 1, characterized in that, The detachable connection structure includes a first plug-in portion (121) disposed on the current transformer module (120) and a second plug-in portion (132) disposed on the controller module (130); the first plug-in portion (121) and the second plug-in portion (132) are electrically connected when axially plugged in.

3. The circuit breaker according to claim 1, characterized in that, The housing (131) includes a front housing (1311), a rear housing (1312), and a controller cover (1313). The front housing (1311) and the rear housing (1312) are fastened together to form a receiving cavity for accommodating the magnetic flux trip device (140). The receiving cavity has openings on opposite sides. The controller cover (1313) and the PCB board (150) can be respectively covered on the two openings and connected to the front housing (1311) and the rear housing (1312).

4. The circuit breaker according to claim 2, characterized in that, The first plug-in part (121) is a female connector, and the second plug-in part (132) is a male pin that matches the female connector. The plug-in direction of the female connector and the male pin is parallel to the depth direction of the second cavity (112).

5. The circuit breaker according to claim 3, characterized in that, The rear housing (1312) has a battery compartment (1314) for housing a battery pack.

6. The circuit breaker according to claim 3, characterized in that, The magnetic flux trip unit (140) includes a drive unit (142) and a push rod mechanism (141) connected in a transmission connection; the front housing (1311) has a through hole (1311a), and the push rod mechanism (141) extends from the through hole (1311a) to the outside of the housing (131); the circuit breaker (100) also includes a contact system and a traction rod (160) connected in a transmission connection, and the electromagnetic drive unit (142) is driven to move the push rod mechanism (141) toward the traction rod (160) and push the traction rod (160) to open the contact system.

7. The circuit breaker according to claim 6, characterized in that, The electromagnetic drive unit (142) includes a permanent magnet and a booster spring, and the push rod mechanism (141) is driven to the permanent magnet through the booster spring.

8. The circuit breaker according to claim 6, characterized in that, The traction rod (160) is pivotally disposed within the first cavity (111); the circuit breaker (100) further includes an operating mechanism, which is connected to the contact system in a transmission manner. The operating mechanism can drive the contact system to close and drive the push rod mechanism (141) to reset.

9. The circuit breaker according to claim 5, characterized in that, The sidewall of the battery compartment (1314) has a first contact piece (1314a) and a second contact piece (1314b), which are respectively disposed on opposite sides of the battery pack; the first contact piece (1314a) and the second contact piece (1314b) are respectively electrically connected to the PCB board (150).

10. The circuit breaker according to claim 1, characterized in that, The circuit breaker (100) also includes a front cover that covers the side of the middle cover (110a) facing away from the base (110).

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