A circuit breaker

Abstract

The application provides a circuit breaker, relates to the technical field of switches, and is used for improving the stability of a wiring seat and further improving the stability of the connection between a wiring terminal and an external wire. The circuit breaker comprises a shell, a wiring terminal, a wiring seat, a threaded connecting piece and a protection structure. The shell has adjacent first and second surfaces. A wiring cavity is formed in the first surface, and an operating opening is formed in the second surface. The connecting end of the wiring terminal extends into the wiring cavity. The wiring seat has an accommodation space, and the connecting end is located in the accommodation space. The threaded connecting piece has an operating end and an acting end arranged oppositely. The operating end corresponds to the operating opening. The acting end extends into the accommodation space, and the acting end is used for abutting against the connecting end. The protection structure is arranged in the wiring cavity. The protection structure comprises a first cover body, and the first cover body has a protection space with an opening facing the connecting end. The first cover body is arranged on the wiring seat, and the first cover body is used for pressing the wiring seat on the shell.

Description

Technical Field

[0001] This application relates to the field of switch technology, specifically to a circuit breaker. Background Technology

[0002] A circuit breaker is an electrical device used to protect and control circuits. Its main function is to safely connect, carry, and disconnect the current in a circuit under normal or fault conditions, thereby ensuring electrical safety.

[0003] Circuit breakers include terminals for connecting to external conductors. In the prior art, for ease of wiring, terminal blocks and threaded connectors are generally used to connect the terminals to the external conductors.

[0004] However, the existing terminal blocks, which are mounted on the circuit breaker housing, have poor stability, which further leads to poor stability of the connection between the terminal blocks and external wires. Utility Model Content

[0005] This application provides a circuit breaker for improving the stability of the terminal block, and further, improving the stability of the connection between the terminal block and the external conductor.

[0006] To achieve the above objectives, this application provides a circuit breaker, including a housing, terminals, a terminal block, a threaded connector, and a protective structure. The housing has adjacent first and second surfaces. A wiring cavity is formed on the first surface, and an operating port is formed on the second surface, communicating with the wiring cavity. Terminals are disposed in the housing. The connecting end of the terminal extends into the wiring cavity. The terminal block is disposed in the wiring cavity and has a receiving space, within which the connecting end is located. The receiving space extends through the terminal block in the extending direction of the connecting end. A threaded connector is threadedly connected to the terminal block. The threaded connector has an operating end and an action end disposed opposite to each other, the operating end corresponding to the operating port. The action end extends into the receiving space and is used to abut against the connecting end. A protective structure is disposed in the wiring cavity. The protective structure includes a first cover having a protective space opening towards the connecting end, and the protective space extending through the first cover in the extending direction of the connecting end. The first cover covers the terminal block and is used to press the terminal block against the housing.

[0007] When the above technical solution is adopted, the connecting end of the terminal block extends into the wiring cavity. The connecting end is used to connect with external wires, and the wiring cavity is formed on the first surface, so that the operator can contact the terminal block from outside the housing, which facilitates the connection between the terminal block and the external wires.

[0008] The terminal block is located within the wiring cavity and has a receiving space within which the connection end is situated. The receiving space extends through the terminal block in the direction of the connection end's extension. This allows the connection end to extend into the receiving space while allowing the operator to access the terminal block from outside the housing, preventing the terminal block's placement from interfering with the installation of the terminal block or the connection between the terminal block and external wires.

[0009] The threaded connector is threaded onto the terminal block. The threaded connector has an operating end and an action end that are positioned opposite each other. The operating end corresponds to the operating port, so that the operator can operate the threaded connector through the operating port, causing the threaded connector to be screwed in or out relative to the terminal block.

[0010] The actuating end extends into the receiving space and is used to abut against the connecting end. When the operator operates the threaded connector, the threaded connector and the terminal block can move relative to each other. When the side of the terminal block away from the threaded connector contacts the connecting end, and the abutting end abuts against the connecting end, the terminal block and the terminal can be connected together.

[0011] In practice, one end of the external wire can be placed between the connector and the side of the terminal block away from the threaded connection, or one end of the external wire can be placed between the threaded connector and the connector. When rotating the threaded connector, the terminal block and the terminal can be connected together, and at the same time, the connector can be connected to the external wire.

[0012] The protective structure includes a first cover with a protective space opening towards the connection end. The first cover is fitted over the terminal block and is used to press the terminal block firmly against the housing. This protective structure improves the stability of the terminal block within the wiring cavity, reduces the possibility of the terminal block shaking, and further enhances the stability of the connection between the terminal block and external wires.

[0013] In the direction of the connection end, the protective space extends through the first housing, so that the connection end can extend into the protective space and the operator can contact the wiring terminal outside the housing, thus avoiding interference from the installation of the wiring terminal and the connection between the wiring terminal and the external wires caused by the setting of the protective structure.

[0014] In one possible implementation, the protective structure further includes a second cover disposed on the side of the first cover near the operating port. The second cover has a through hole in the extending direction of the threaded connector, the through hole communicating with the protective space. The second cover is fitted over the threaded connector.

[0015] When the above technical solution is adopted, the first cover is installed outside the terminal block, and the second cover is installed outside the threaded connector. This not only protects the terminal block and the threaded connector, but also, when the circuit breaker is a multi-pole circuit breaker, effectively increases the electrical clearance and creepage distance between two adjacent terminal blocks and two adjacent threaded connectors, effectively reducing the possibility of breakdown between adjacent poles of the circuit breaker.

[0016] Meanwhile, the first and second covers can shield the terminal blocks and threaded connections, effectively reducing the risk of electric shock caused by accidental contact during operation.

[0017] The through hole connects to the protective space, allowing the working end of the threaded connector to extend into the protective space and further into the receiving space to abut against the connecting end. The through hole also allows the operator to access the operating end through the operating port to operate the threaded connector.

[0018] In one possible implementation, the first cover is located at the outer clearance opening and has an extension extending toward the center of the clearance opening.

[0019] When the above technical solution is adopted, if the circuit breaker is a multi-pole circuit breaker, the electrical clearance and creepage distance between two adjacent terminals can be further improved, effectively reducing the possibility of breakdown between adjacent poles of the circuit breaker. At the same time, it can enhance the protection and shielding effect of the terminals, effectively reducing the probability of electric shock caused by accidental contact during operation.

[0020] In one possible implementation, the outer wall of the first cover is provided with one of a protrusion and a recess that cooperate with each other, and the cavity wall of the wiring cavity is provided with the other of a protrusion and a recess.

[0021] When the above technical solution is adopted, the protrusion and the recess engage to lock the protective structure into place with the housing. This indicates that the protective structure and the housing are detachably connected. When the protective structure or housing requires maintenance, the protective structure can be removed from the housing for separate inspection and repair. When the protective structure or housing needs replacement, it can be replaced individually, saving costs.

[0022] When the protrusion and the recess mate, the protective structure snaps into the housing, allowing for one-step installation. This reduces the number of parts and steps, simplifies the structure, and saves time and costs.

[0023] In one possible implementation, a protrusion is provided on the outer wall of the first cover, and a recess is provided on the cavity wall of the wiring cavity.

[0024] In one possible implementation, the housing includes a base and a middle cover, with the middle cover covering the base. A recess is formed on the base and is located on the side closest to the middle cover.

[0025] When using the above technical solution, the recess is formed on the base, and the recess is located on the side near the middle cover. In this case, during actual installation, the protrusion can be aligned and matched with the recess, and then the protective structure can be installed on the base. Afterwards, the middle cover is placed on the base, and the middle cover and base cooperate to install the protective structure on the shell. This facilitates the installation of the protective structure, and prevents damage to the protective structure and the shell during the installation process.

[0026] In one possible implementation, a groove is provided on the cavity wall of the wiring cavity away from the operating port, and the groove mates with the side of the first cover away from the operating port.

[0027] When the above technical solution is adopted, after the protective structure is placed in the wiring cavity, the protruding part and the recessed part cooperate, and the side of the first cover away from the operating port cooperates with the groove. This enhances the stability of the protective structure within the wiring cavity. Furthermore, it prevents the terminal block from shaking during use, avoiding unreliable connections between the terminals and external wires due to the shaking of the terminal block.

[0028] In one possible implementation, the circuit breaker also includes a pressure plate disposed at the operating end, the pressure plate being used to abut against the connecting end.

[0029] When using the above technical solution, the pressure plate abuts against the connection end when the terminal block is connected to the external wire. The pressure plate increases the contact area with the connection end, improving the stability of the connection between the terminal block and the external wire. Simultaneously, it reduces the stress on the connection end, extending the service life of the terminal block.

[0030] In one possible implementation, the protective structure is a nylon protective structure.

[0031] When the above technical solution is adopted, the nylon protective structure has better toughness and impact resistance, excellent wear resistance and chemical corrosion resistance, which helps to extend the service life of the protective structure.

[0032] In one possible implementation, the second cover is provided with reinforcing ribs.

[0033] When the above technical solution is adopted, the rigidity, strength and deformation resistance of the second cover can be improved, and the service life of the protective structure can be extended. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the circuit breaker provided in an embodiment of this application.

[0035] Figure 2 A partial structural diagram of the circuit breaker provided in the embodiments of this application. Figure 1 .

[0036] Figure 3 A partial structural diagram of the circuit breaker provided in the embodiments of this application. Figure 2 .

[0037] Figure 4 This is a schematic diagram of the terminal block provided in an embodiment of this application.

[0038] Figure 5 This is a schematic diagram of the protective structure provided in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures: 1-Housing, 11-Base, 111-Recess, 112-Groove, 12-Middle Cover, 121-Operating Port, 2-Terminal Block, 3-Terminal Block 4-Threaded connector, 5-Protective structure, 51-First cover, 511-Extension, 512-Protrusion, 513-Connecting plate. 52-Second cover, 521-Through hole, 522-Reinforcing rib, 6-Pressure plate. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0043] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0045] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0046] Molded case circuit breakers are a commonly used protective electrical appliance. They have functions such as switching load current and overload and short circuit protection for load current. They are widely used in various power distribution systems and for overload and short circuit protection of motors.

[0047] In practical use, for the sake of convenience in wiring or to meet certain application standards, people sometimes use external wires without wiring lugs to connect to the terminals of the circuit breaker.

[0048] To facilitate the connection of external conductors to the terminals, terminal blocks and threaded connectors are often installed on the circuit breaker housing to connect the terminals to the external conductors.

[0049] However, the existing terminal blocks, which are mounted on the circuit breaker housing, have poor stability, which further leads to poor stability of the connection between the terminal blocks and external wires.

[0050] In view of the problems existing in the above-mentioned prior art, please refer to Figures 1 to 3As shown in the figure, this application provides a circuit breaker, which includes a housing 1, a terminal block 2, a terminal block 3, a threaded connector 4, and a protective structure 5.

[0051] In specific implementation, the structure of the shell 1 can be a cuboid structure, and the shell 1 can be a plastic shell 1. The shell 1 has adjacent first surfaces and second surfaces, and the first surfaces and second surfaces can be perpendicular to each other.

[0052] A wiring cavity is provided on the first surface, and the wiring cavity penetrates the first surface of the housing 1. The structure and size of the wiring cavity are not limited here, but shall be subject to the actual situation.

[0053] like Figures 1 to 3 As shown, an operation port 121 is provided on the second surface, and the operation port 121 is connected to the wiring cavity. The structure and size of the operation port 121 are not specifically limited here. In a specific implementation, the operation port 121 can penetrate through the first surface.

[0054] Terminal 2 is disposed in housing 1, with one end of terminal 2 located inside housing 1. Terminal 2 can be fixedly mounted on housing 1. Terminal 2 is used to connect to external wires, thereby enabling the circuit breaker to be electrically connected to an external power source or electrical equipment to supply power to the equipment.

[0055] For ease of description, the circuit breaker provided in this application embodiment will be described using the cuboid structure of the housing 1 as an example.

[0056] Simultaneously, the length of shell 1 is defined to extend along a first direction, the width of shell 1 is defined to extend along a second direction, and the height of shell 1 is defined to extend along a third direction, such as... Figures 1 to 3 As shown. The first direction, the second direction, and the third direction are all perpendicular to each other.

[0057] It should be noted that in the embodiments provided in this application, the first direction, the second direction, and the third direction are only for the purpose of describing the positional relationship between the components included in the circuit breaker, and are not specific limitations of this application.

[0058] In this configuration, the first surface is perpendicular to the first direction, and the second surface is parallel to both the first and second directions. The housing 1 has two first surfaces, which are arranged opposite to each other.

[0059] Terminal 2 can be an incoming line terminal or an outgoing line terminal. The circuit breaker provided in this embodiment can be a single-pole circuit breaker or a multi-pole circuit breaker.

[0060] When the circuit breaker is a single-pole circuit breaker, it has one incoming terminal and one outgoing terminal. A wiring cavity is provided on one of the first surfaces. Simultaneously, a wiring cavity is provided on the other first surface.

[0061] When the circuit breaker is a two-pole circuit breaker, it has two incoming terminals and two outgoing terminals. Two wiring cavities are provided on one of the first surfaces, and these two cavities are arranged sequentially along a second direction. Simultaneously, two wiring cavities are provided on the other first surface, and these two wiring cavities are arranged sequentially along the second direction.

[0062] When the circuit breaker is a three-pole circuit breaker, it has three incoming terminals and three outgoing terminals. Three wiring cavities are provided on one of the first surfaces, and these three cavities are arranged sequentially along a second direction. Simultaneously, three wiring cavities are provided on the other first surface, and these three wiring cavities are arranged sequentially along the second direction.

[0063] The number of terminal blocks 3, the number of threaded connectors 4, and the number of protective structures 5 can all be the same as the number of wiring cavities.

[0064] In the embodiments provided in this application, the connecting end of the terminal 2 extends into the wiring cavity. The connecting end is used to connect to an external wire, and the wiring cavity is formed on the first surface, so that the operator can contact the terminal 2 from outside the housing 1, which facilitates the connection of the terminal 2 to the external wire.

[0065] Terminal block 3 is located within the wiring cavity, and has a receiving space, with the connection end situated within this space. Please refer to... Figures 1 to 4 As shown, in the extending direction of the connection end, the receiving space extends through the terminal block 3.

[0066] In the extending direction of the connection end, the receiving space extends through the terminal block 3, so that the connection end can extend into the receiving space and the operator can contact the terminal block 2 outside the housing 1, avoiding interference from the setting of the terminal block 3 on the installation of the terminal block 2 and the connection between the terminal block 2 and the external wire.

[0067] It should be noted that, in the embodiments provided in this application, the extension direction of the connecting end can be parallel to the first direction.

[0068] The specific structure and dimensions of the terminal block 3 are not limited here, and shall be subject to the actual situation. In the embodiments provided in this application, please refer to... Figures 1 to 4 As shown, the wiring cavity can be a cuboid structure, the terminal block 3 can be a cuboid structure, and correspondingly, the accommodating space can also be a cuboid structure.

[0069] In practical implementation, the terminal block 3 can be formed by splicing four plate structures end to end. Of course, the terminal block 3 can also be formed by bending a single plate structure multiple times. The specific processing and forming method of the terminal block 3 is not limited here, and is not actually limited to this.

[0070] The threaded connector 4 is threadedly connected to the terminal block 3. The threaded connector 4 can be a bolt or a screw. A threaded hole that mates with the threaded connector 4 can be made in the terminal block 3.

[0071] The threaded connector 4 has an operating end and an action end that are arranged opposite to each other. The operating end corresponds to the operating port 121 so that the operator can operate the threaded connector 4 through the operating port 121, so that the threaded connector 4 can be screwed in or out relative to the terminal block 3.

[0072] The axis of the threaded connector 4 can extend in a third direction, and the threaded connector 4 can move in a third direction when the operator operates the threaded connector 4.

[0073] In practice, an internal hexagonal hole can be provided at the operating end. The operator can insert one end of the internal hexagonal wrench into the wiring cavity through the operating port 121 and engage with the internal hexagonal hole to rotate the threaded connector 4.

[0074] The working end extends into the receiving space and is used to abut against the connecting end. When the operator operates the threaded connector 4, the threaded connector 4 and the terminal block 3 can move relative to each other. When the side of the terminal block 3 away from the threaded connector 4 contacts the connecting end, and the working end abuts against the connecting end, the terminal block 3 and the terminal 2 can be connected together.

[0075] In practice, one end of the external wire can be placed between the connecting end and the side of the terminal block 3 away from the threaded connection, or one end of the external wire can be placed between the threaded connector 4 and the connecting end. When the threaded connector 4 is rotated, the terminal block 3 and the terminal 2 can be connected together, and at the same time, the connecting end can be connected to the external wire.

[0076] The protective structure 5 is disposed within the wiring cavity. The manner in which the protective structure 5 is disposed within the wiring cavity is not specifically limited here. For example, the protective structure 5 can be connected to the housing 1 by welding, snap-fit ​​bonding, or other methods, so that the protective structure 5 is disposed within the wiring cavity.

[0077] The protective structure 5 is made of a non-conductive material, and can be a plastic protective structure 5. For example, the protective structure 5 can be made of nylon.

[0078] The nylon protective structure 5 has good toughness and impact resistance, excellent wear resistance and chemical corrosion resistance, which helps to extend the service life of the protective structure 5.

[0079] As an example, please combine Figure 3 and Figure 5 As shown, the protective structure 5 includes a first cover 51, which has a protective space with an opening facing the connection end. The first cover 51 covers the outside of the terminal block 3 and is used to press the terminal block 3 onto the housing 1.

[0080] Specifically, the side of the terminal block 3 near the operating port 121 can be in close contact with the first cover 51. After the protective structure 5 is connected to the housing 1, the terminal block 3 can be pressed against the cavity wall of the wiring cavity away from the operating port 121.

[0081] Thus, the protective structure 5 can improve the stability of the terminal block 3 inside the wiring cavity, reduce the possibility of the terminal block 3 shaking, and further improve the stability of the connection between the terminal block 2 and the external wire.

[0082] In practical implementation, after the protective structure 5 is connected to the housing 1, the terminal block 3 can be pressed tightly against the cavity wall of the wiring cavity away from the operating port 121. The connection end is located within the accommodating space. Through reasonable design, when the connection end is connected to an external wire, the connection end is in contact with the side of the terminal block 3 away from the operating port 121, and the active end abuts against the connection end.

[0083] In the extension direction of the connection end, the protective space extends through the first cover 51, so that the connection end can extend into the protective space and the operator can contact the terminal 2 outside the housing 1, avoiding interference from the setting of the protective structure 5 on the installation of the terminal 2 and the connection between the terminal 2 and the external wire.

[0084] In some embodiments, combined with Figure 3 and Figure 5 As shown, the protective structure 5 also includes a second cover 52, which is disposed on the side of the first cover 51 near the operation port 121.

[0085] The structure and dimensions of the second cover 52 are not specifically limited here, and shall be subject to the actual situation. In actual operation, the second cover 52 can be connected to the first cover 51 by welding, snap-fitting, or bonding. Of course, the connection method between the first cover 51 and the second cover 52 is not limited to this. For example, the first cover 51 can also be processed and formed together with the second cover 52. That is to say, the protective structure 5 can be a one-piece structure.

[0086] In the extending direction of the threaded connector 4, the second cover 52 has a through hole 521, which communicates with the protective space. The second cover 52 is fitted over the threaded connector 4.

[0087] At this time, the first cover 51 covers the terminal block 3, and the second cover 52 covers the threaded connector 4, which not only protects the terminal block 3 and the threaded connector 4, but also, when the circuit breaker is a multi-pole circuit breaker, effectively increases the electrical clearance and creepage distance between two adjacent terminal blocks 3 and two adjacent threaded connectors 4, effectively reducing the possibility of breakdown between adjacent poles of the circuit breaker.

[0088] Meanwhile, the first cover 51 and the second cover 52 can shield the terminal block 3 and the threaded connector 4, which can effectively reduce the risk of electric shock caused by accidental contact during operation.

[0089] The through hole 521 is connected to the protective space, allowing the working end of the threaded connector 4 to extend into the protective space and further into the receiving space to abut against the connecting end. The through hole 521 allows the operator to access the operating end through the operating port 121 to operate the threaded connector 4.

[0090] As an example, such as Figure 5 As shown, the first cover 51 is located at the outer clearance opening and has an extension 511 extending toward the center of the clearance opening.

[0091] At this time, when the circuit breaker is a multi-pole circuit breaker, the electrical clearance and creepage distance between two adjacent terminals 3 can be further improved, effectively reducing the possibility of breakdown between adjacent poles of the circuit breaker. At the same time, it can enhance the protection and shielding effect of the terminals 3, effectively reducing the probability of electric shock caused by accidental contact during operation.

[0092] It should be noted that, in the embodiments provided in this application, since the cover has a protective space, and the protective space extends through the first cover 51 in the extension direction of the connecting end, the first cover 51 forms two clearance openings. The clearance opening located on the outer side refers to the clearance opening located near the outside of the housing 1.

[0093] Meanwhile, in the embodiments provided in this application, the protective structure 5 also includes a connecting plate 513, such as Figure 5 As shown. The connecting plate 513 corresponds to the clearance opening on the inner side of the first cover 51 to enhance the structural strength of the protective structure 5. In addition, it is understood that the size and position of the connecting plate 513 are such that they do not interfere with the connection end of the terminal 2 extending into the protective space.

[0094] In one alternative embodiment, the outer wall of the first cover 51 is provided with one of a protrusion 512 and a recess 111 that cooperate with each other, and the cavity wall of the wiring cavity is provided with the other of a protrusion 512 and a recess 111.

[0095] Thus, when the protrusion 512 and the recess 111 engage, the protective structure 5 is locked into the housing 1. This indicates that the protective structure 5 and the housing 1 are detachably connected. When the protective structure 5 or the housing 1 requires maintenance, the protective structure 5 can be removed from the housing 1 for inspection and maintenance of both. When the protective structure 5 or the housing 1 needs replacement, both can be replaced individually, saving costs.

[0096] When the protrusion 512 and the recess 111 are engaged, the protective structure 5 and the housing 1 are snapped together, allowing for one-step installation, which reduces the number of parts and steps, simplifies the structure, and saves time and cost.

[0097] In a specific implementation, a recessed portion 111 can be provided on the outer wall of the first cover 51, and correspondingly, a protruding portion 512 that cooperates with the recessed portion 111 can be provided on the cavity wall of the wiring cavity.

[0098] In the embodiments provided in this application, please refer to Figure 3 and Figure 5 As shown, a protrusion 512 is provided on the outer wall of the first cover 51, and a recess 111 is provided on the cavity wall of the wiring cavity.

[0099] As one possible implementation, such as Figures 1 to 3 As shown, the housing 1 provided in this embodiment includes a base 11 and a middle cover 12, with the middle cover 12 covering the base 11.

[0100] In practice, the middle cover 12 and the base 11 can be connected together by welding, snap-fitting or screw connection.

[0101] In the embodiments provided in this application, the recess 111 is formed on the base 11, and the recess 111 is located on the side near the middle cover 12, such as... Figure 3 As shown. In actual installation, the protrusion 512 can be aligned with the recess 111, and then the protective structure 5 can be installed on the base 11. Afterwards, the middle cover 12 is placed on the base 11, and the middle cover 12 and the base 11 cooperate to install the protective structure 5 on the housing 1. This facilitates the installation of the protective structure 5 and prevents damage to the protective structure 5 and the housing 1 during installation.

[0102] In practice, protrusions 512 can be provided on both opposite sides of the first cover 51 to enhance the stability of the connection between the protective structure 5 and the shell 1.

[0103] In one possible implementation, such as Figure 3As shown, a groove 112 is provided on the cavity wall of the wiring cavity away from the operation port 121, and the groove 112 cooperates with the side of the first cover 51 away from the operation port 121.

[0104] After the protective structure 5 is installed in the wiring cavity, the protrusion 512 mates with the recess 111, and the side of the first cover 51 away from the operating port 121 mates with the groove 112. This enhances the stability of the protective structure 5 within the wiring cavity. Furthermore, it prevents the terminal block 3 from shaking during use, avoiding unreliable connections between the terminal block 2 and external wires due to the shaking of the terminal block 3.

[0105] In some embodiments, the circuit breaker further includes a pressure plate 6 disposed at the operating end, the pressure plate 6 being used to abut against the connecting end.

[0106] Thus, when terminal 2 is connected to an external wire, pressure plate 6 abuts against the connection end. The pressure plate 6 increases the contact area with the connection end, improving the stability of the connection between terminal 2 and the external wire. Simultaneously, it reduces the stress on the connection end, extending the service life of terminal 2.

[0107] In a specific implementation, the pressure plate 6 is movably disposed on the threaded connector 4. For example, the pressure plate 6 can be disposed on the functional end of the threaded connector 4 by means of welding, snap-fitting, riveting, or threaded connection.

[0108] As an example, refer to Figure 5 As shown, the second cover 52 is provided with reinforcing ribs 522.

[0109] In this case, the rigidity, strength and deformation resistance of the second cover 52 can be improved, and the service life of the protective structure 5 can be extended.

[0110] In the embodiments provided in this application, the axis of the threaded connector 4 can be parallel to a third direction. The movement direction of the pressure plate 6 can be parallel to a third direction, and the reinforcing rib 522 can be arranged along a third direction outside the second cover 52.

[0111] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A circuit breaker, characterized in that, include: The housing has an adjacent first surface and a second surface; a wiring cavity is formed on the first surface, and an operating port is formed on the second surface; the operating port is connected to the wiring cavity. A wiring terminal is disposed in the housing; the connecting end of the wiring terminal extends into the wiring cavity. A terminal block is disposed in the wiring cavity; the terminal block has a receiving space, and the connecting end is located within the receiving space; in the extending direction of the connecting end, the receiving space extends through the terminal block; A threaded connector is threadedly connected to the terminal block; the threaded connector has an operating end and an action end that are disposed opposite to each other, the operating end corresponding to the operating port; the action end extends into the receiving space and is used to abut against the connecting end; A protective structure is disposed within the wiring cavity; the protective structure includes a first cover, the first cover having a protective space with an opening facing the connection end, and the protective space extending through the first cover in the extending direction of the connection end; the first cover covers the wiring socket and is used to press the wiring socket against the housing.

2. The circuit breaker according to claim 1, characterized in that, The protective structure further includes a second cover, which is disposed on the side of the first cover near the operating port; in the extending direction of the threaded connector, the second cover has a through hole, which communicates with the protective space; the second cover is sleeved on the outside of the threaded connector.

3. The circuit breaker according to claim 1, characterized in that, The first cover is located at the outer clearance opening and has an extension extending toward the center of the clearance opening.

4. The circuit breaker according to claim 1, characterized in that, The outer wall of the first cover is provided with one of a protruding part and a recessed part that cooperate with each other, and the cavity wall of the wiring cavity is provided with the other of the protruding part and the recessed part.

5. The circuit breaker according to claim 4, characterized in that, The first cover has a protrusion on its outer wall and the wiring cavity has a recess on its cavity wall.

6. The circuit breaker according to claim 5, characterized in that, The housing includes a base and a middle cover, the middle cover being disposed on the base; the recess is formed on the base, and the recess is located on the side close to the middle cover.

7. The circuit breaker according to any one of claims 1-6, characterized in that, A groove is provided on the cavity wall of the wiring cavity away from the operating port, and the groove cooperates with the side of the first cover away from the operating port.

8. The circuit breaker according to any one of claims 1-6, characterized in that, The circuit breaker also includes a pressure plate disposed at the working end, the pressure plate being used to abut against the connecting end.

9. The circuit breaker according to any one of claims 1-6, characterized in that, The protective structure is a nylon protective structure.

10. The circuit breaker according to claim 2, characterized in that, The second cover is provided with reinforcing ribs.

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