A small circuit breaker

Abstract

The present invention belongs to the field of circuit breakers, and specifically is a small circuit breaker, comprising a circuit breaker body, wherein the circuit breaker body is composed of two short-circuit overload protection modules arranged in parallel, a synchronous switch for controlling a circuit is installed between the front ends of the two short-circuit overload protection modules, the top and bottom of the short-circuit overload protection modules are connected to junction boxes, the junction boxes are used to connect external wires, and at the same time connect the circuit with the inside of the short-circuit overload protection module, the junction box and the short-circuit overload protection module are detachably arranged, through this arrangement, during the process of replacing the circuit breaker, the wires can still be kept fixed and not exposed, and the first installation is generally performed by a professional installation master, and the subsequent installation wires are not exposed to the outside, which greatly reduces the safety hazards during the installation process and makes the installation process simple and convenient.

Description

Technical Field

[0001] The invention belongs to the field of circuit breakers, in particular to a small circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy and protect power lines. They can automatically cut off the circuit when they suffer serious overloads or short circuits, undervoltage and other faults.

[0003] A patent application with publication number CN115083848A discloses a power circuit breaker and household appliance, including a protective rear shell and a protective front shell, one end of the protective rear shell is hinged to one end of the protective front shell, and a circuit breaker body is arranged on the inner side of the protective rear shell. By arranging a three-layer protection structure of an inner rigid layer, a ceramic layer and an outer rigid layer on the outer side of the circuit breaker body, the interior is cooled at the same time, thereby achieving an efficient fire prevention effect and greatly improving the safety when used at home.

[0004] Traditional small circuit breakers are often used in household circuits. Although the service life of circuit breakers is long, if they are not replaced for many years, the internal parts are prone to failure due to aging. At the same time, when the circuit breaker is overloaded, short-circuited, over-voltage or mechanically fails, the circuit breaker is also easily damaged and needs to be replaced. In the process of replacing the circuit breaker, the original circuit breaker needs to be disassembled, which will cause the live wire to be directly exposed. Ordinary family members lack installation experience and safety accidents are prone to occur.

[0005] To this end, the present invention provides a miniature circuit breaker. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a miniature circuit breaker according to the present invention comprises a circuit breaker body, the circuit breaker body is composed of two short-circuit overload protection modules arranged in parallel, a synchronous switch for controlling the circuit is installed between the front ends of the two short-circuit overload protection modules, the top and bottom of the short-circuit overload protection modules are connected to a junction box, the junction box is used to connect external wires and connect the circuit with the inside of the short-circuit overload protection module, and the junction box and the short-circuit overload protection module are detachably arranged;

[0008] By separating the short-circuit overload protection module and the two junction boxes from each other, the interior of the short-circuit overload protection module is used to place parts used in traditional circuit breakers, such as contacts, electromagnetic coils and springs. When the circuit breaker body needs to be replaced, whether the parts are aged or damaged, the damaged parts are generally the internal parts of the short-circuit overload protection module. You only need to turn off the synchronous switch first to make the circuit no longer connected, and then separate the short-circuit overload protection module from the junction box. The junction box remains in place, and the short-circuit overload protection module is taken out so that the wires are still fixed in the junction box. After that, you only need to install the new short-circuit overload protection module in the original position to complete the replacement. Through this setting, the wires can be kept fixed and not exposed during the replacement of the circuit breaker. The first installation is generally performed by a professional installation master, and the wires are not exposed to the outside during subsequent installations, which greatly reduces the safety hazards during the installation process and makes the installation process simple and convenient.

[0009] Preferably, a card slot is provided at the rear end of the short-circuit overload protection module, and two slide slots are provided at the top and bottom of the short-circuit overload protection module. A card strip adapted to the slide slot is fixedly connected to one side of the junction box close to the short-circuit overload protection module, and energized contacts for connecting the circuit are installed at the top and bottom of the short-circuit overload protection module. The energized contacts are arranged in an outer arch shape, and the arrangement of the card slot is the same as the structure of a traditional circuit breaker. Before installation, a traditional circuit breaker needs to fix a card plate at the installation location, and the shape of the card plate is adapted to the card slot so that the circuit breaker body can be slid into it and can be slid to adjust the position. After the circuit breaker body is fixed, the wires are fixed to the junction box, and then the junction box is fixed using tools such as screws. When the short-circuit overload protection module needs to be replaced, the short-circuit overload protection module only needs to be slid outward from one side, and then the new short-circuit overload protection module is slid into the original position, so that the outer arched energized contacts are connected to the junction box, and then the synchronous switch is turned on to complete the replacement work.

[0010] Preferably, a wire entry slot for inserting wires is provided on a side of the junction box away from the short-circuit overload protection module, a conductive plate that can be moved horizontally is provided on the inner side of the junction box, a power-on plate is fixedly connected to one side of the conductive plate, and the power-on plate is located on the outer side of the junction box, and different wires are separated and placed in the wire entry slot. After being placed in, the conductive plate is moved to squeeze the wires, so that the current can pass through the conductive plate, the power-on plate and the power-on contact piece, and finally be transmitted to the short-circuit overload protection module to complete the circuit transmission work.

[0011] Preferably, an inner groove is provided on one side of the junction box close to the short-circuit overload protection module, the power-on plate is slidably engaged in the inner groove, a protective layer is provided on the outer side of the wire, the exposed parts of the wire are all located inside the wire inlet slot, the power-on plate is always in the inner groove, and slides with the conductive plate to ensure that the circuit can be connected, and at the same time the power-on plate will not be exposed to the outside to avoid being touched, and the outer arched power-on contact piece can contact the power-on plate to complete the circuit connection, and the protective layer is the original leather cover of the wire, and the metal parts that are stripped of the leather cover need to be completely located in the wire inlet slot, which further ensures the safety of use and installation.

[0012] Preferably, a threaded tube is fixedly connected to the front end of the interior of the junction box, a screw is threadedly connected in the threaded tube, one end of the screw is rotatably connected to the surface of the conductive plate, and the conductive plate is slidably clamped in the interior of the junction box. By rotating the screw with a screwdriver, the screw can be controlled to rotate and move, thereby controlling the horizontal movement of the conductive plate to achieve the squeezing and release of the wires.

[0013] Preferably, a vertical adjustment plate is provided inside the junction box, the adjustment plate is located on one side of the wire inlet slot, a bayonet matching the diameter of the wire is provided at the bottom of the adjustment plate, the adjustment plate is slidably engaged with the junction box in the vertical direction, and when inserting the wire, the adjustment plate is first pulled out upward, the bottom of the wire is bent, and after the wire is placed in the wire inlet slot, the end of the wire is placed under the bayonet, and then the adjustment plate is pressed downward to fix the end of the wire, and then the adjustment plate is translated and extruded. This arrangement can effectively fix the wire in the wire inlet slot and reduce the inability of the circuit to form a path due to the deviation of the wire during the extrusion of the conductive plate.

[0014] Preferably, a pressing roller is provided on the side of the adjustment plate away from the wire inlet slot, a bracket is connected to the outer side of the pressing roller, the bracket is rotatably connected to the surface of the adjustment plate through a torsion spring shaft, a rotatable active roller is provided below the pressing roller, a convex strip for squeezing the protective layer of the wire is fixed to the top of the adjustment plate, and the position where the wire and the conductive plate are in long-term contact is also prone to poor contact due to long-term current passing through. Through the arrangement of the active roller and the pressing roller, after the wire is fixed, since the adjustment plate is inserted from top to bottom, the pressing roller and the active roller will squeeze the end of the wire, and then slightly loosen the squeezing of the conductive plate on the wire, and then rotate the active roller to pull the bottom of the wire toward the direction of the adjustment plate. Since the convex strip on the top of the adjustment plate will block the protective layer on the outside of the wire, the wire entering the wire inlet slot will be stripped of the protective layer by the convex strip, so that the subsequent wire and the conductive plate can be electrically contacted, and the wire that has been used for a long time can be moved to the other side of the adjustment plate. Through this arrangement, important parts of the circuit breaker are replaced in all directions, and at the same time, the wires will not be exposed to the outside to cause safety hazards throughout the process.

[0015] Preferably, a cross nail is rotatably connected to the outer side of the junction box, a large gear is fixedly connected to the end of the cross nail, a transmission rod is fixedly connected to one end of the active roller, and a driven gear meshing with the large gear is fixedly connected to the outer side of the transmission rod. The cross nail is rotated by a tool such as a screwdriver to control the rotation of the large gear and the driven gear, thereby driving the transmission rod and the active roller to rotate, thereby completing the extrusion and dragging of the wires. The active roller and the pressing roller are both made of insulating material and will not transmit current.

[0016] Preferably, an isolation frame is fixedly connected to the interior of the junction box, an isolation area is formed between the isolation frame and the adjustment plate, and the pressing roller and the active roller are both located in the isolation area. The setting of the isolation frame isolates several independent spaces in the junction box, thereby reducing the influence of the pulled wires on the normal operation of other parts.

[0017] Preferably, a wire outlet for conveying wires is provided on the surface of the isolation frame, one of the side panels of the isolation frame is used to prevent the wires from affecting the large gear and the transmission rod, a deflection block for deflecting the direction of the wires is fixedly connected to the inner wall of the junction box, and a flip cover rotatably connected to the junction box is provided on one side of the adjustment plate. The end of the wire will pass through the wire outlet and enter another area, which is independent of the area where the active roller is located, thereby reducing the influence of the wires on the active roller, and the flip cover can be rotated upward to open when the adjustment plate is removed, so as to facilitate the removal of the adjustment plate.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. A small circuit breaker described in the present invention separates a short-circuit overload protection module from two junction boxes. The interior of the short-circuit overload protection module is used to place parts used in traditional circuit breakers, such as contacts, electromagnetic coils and springs. When the circuit breaker body needs to be replaced, no matter the parts are aged or damaged, the damaged parts are generally the internal parts of the short-circuit overload protection module. It is only necessary to turn off the synchronous switch first to make the circuit no longer connected, and then separate the short-circuit overload protection module from the junction box. The junction box remains in place, and the short-circuit overload protection module is taken out to allow the wires to remain fixed in the junction box. After that, it is only necessary to install the new short-circuit overload protection module in the original position to complete the replacement work. Through this arrangement, the wires can be kept fixed and not exposed during the replacement of the circuit breaker. The first installation is generally performed by a professional installation master, and the wires are not exposed to the outside during subsequent installations, which greatly reduces the safety hazards during the installation process and makes the installation process simple and convenient.

[0020] 2. The miniature circuit breaker described in the present invention has a slot arrangement that is the same as the structure of a conventional circuit breaker. Before installation, a conventional circuit breaker needs to have a card plate fixed at the installation location. The shape of the card plate matches the slot, so that the circuit breaker body can be slid into it and adjusted in position. After the circuit breaker body is fixed, the wires are fixed to the junction box, and then the junction box is fixed using screws and other tools. When the short-circuit overload protection module needs to be replaced, the short-circuit overload protection module only needs to be slid outward from one side, and then the new short-circuit overload protection module is slid into the original position, so that the outer arched energized contact piece is connected to the junction box, and then the synchronous switch is turned on to complete the replacement work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a stereogram of the present invention;

[0023] Figure 2 It is a separated stereogram of the short-circuit overload protection module and the junction box of the present invention;

[0024] Figure 3 is a cross-sectional view of a junction box of the present invention;

[0025] Figure 4 is a stereogram of the screw rod and the isolation frame of the present invention;

[0026] Figure 5 is a three-dimensional diagram of the adjustment plate of the present invention;

[0027] Figure 6 is a three-dimensional diagram of the isolation frame of the present invention;

[0028] Figure 7 is a perspective view of a conductive plate of the present invention;

[0029] In the figure: 1. Circuit breaker body; 2. Card slot; 3. Electric wire; 4. Synchronous switch; 5. Short circuit overload protection module; 6. Junction box; 7. Slide; 8. Power contact; 9. Inlet slot; 10. Card strip; 11. Threaded pipe; 12. Cross nail; 13. Screw; 14. Conductive plate; 15. Power plate; 16. Transfer rod; 17. Isolation frame; 18. Flip cover; 19. Card slot; 20. Active roller; 21. Pressing roller; 22. Deflection block; 23. Outlet; 24. Adjustment plate; 25. Large gear. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 4As shown, a miniature circuit breaker according to an embodiment of the present invention comprises a circuit breaker body 1, wherein the circuit breaker body 1 is composed of two short-circuit overload protection modules 5 arranged in parallel, a synchronous switch 4 for controlling the circuit is installed between the front ends of the two short-circuit overload protection modules 5, the top and bottom of the short-circuit overload protection module 5 are connected to a junction box 6, the junction box 6 is used to connect the external wires 3, and at the same time connect the circuit with the inside of the short-circuit overload protection module 5, and the junction box 6 and the short-circuit overload protection module 5 are detachably arranged;

[0032] After long-term use, the contacts, electromagnetic coils, springs and other parts of the circuit breaker that are responsible for disconnecting the circuit are damaged and aged the fastest due to long-term influence of the current, so they are the key parts that need to be replaced. The connection with the wire 3 does not need to disconnect the circuit like the contacts, so no arc will be generated, there will be no large temperature changes, and it does not need to be deformed under the influence of the current like the spring, so it has the longest service life. The contacts, electromagnetic coils, springs and other parts inside the circuit breaker need to be replaced;

[0033] By separating the short-circuit overload protection module 5 and the two junction boxes 6 from each other, the interior of the short-circuit overload protection module 5 is used to place parts used in traditional circuit breakers, such as contacts, electromagnetic coils and springs. When the circuit breaker body 1 needs to be replaced, no matter the parts are aged or damaged, the damaged parts are generally the internal parts of the short-circuit overload protection module 5. It is only necessary to turn off the synchronous switch 4 first so that the circuit is no longer connected, and then separate the short-circuit overload protection module 5 from the junction box 6. The junction box 6 remains in place, and the short-circuit overload protection module 5 is taken out so that the wire 3 is still fixed in the junction box 6. After that, it is only necessary to install the new short-circuit overload protection module 5 in the original position to complete the replacement work. Through this arrangement, the wire 3 can be kept fixed and not exposed during the replacement of the circuit breaker. The first installation is generally performed by a professional installation master, and the wire 3 is not exposed to the outside during the subsequent installation, which greatly reduces the safety hazards during the installation process and makes the installation process simple and convenient.

[0034] like Figures 1 to 4 As shown, a card slot 2 is provided at the rear end of the short-circuit overload protection module 5, two slide slots 7 are provided at the top and bottom of the short-circuit overload protection module 5, a card strip 10 adapted to the slide slot 7 is fixedly connected to one side of the junction box 6 close to the short-circuit overload protection module 5, and a power-on contact piece 8 for connecting the circuit is installed at the top and bottom of the short-circuit overload protection module 5, and the power-on contact piece 8 is an outer arched arrangement;

[0035] During operation, the arrangement of the card slot 2 is the same as the structure of a traditional circuit breaker. Before installation, a traditional circuit breaker needs to fix a card plate at the installation location. The shape of the card plate is adapted to the card slot 2, so that the circuit breaker body 1 can be slid into it and the position can be adjusted by sliding. After the circuit breaker body 1 is fixed, the wire 3 is fixed to the junction box 6, and then the junction box 6 is fixed with screws and other tools. When the short-circuit overload protection module 5 needs to be replaced, it is only necessary to slide the short-circuit overload protection module 5 outward from one side, and then slide the new short-circuit overload protection module 5 into the original position, so that the outer arched power-on contact 8 is connected to the junction box 6, and then the synchronous switch 4 is turned on to complete the replacement work.

[0036] like Figures 2 to 7 As shown, a wire entry slot 9 for inserting the wire 3 is provided on a side of the junction box 6 away from the short-circuit overload protection module 5, a conductive plate 14 that can be translated is provided on the inner side of the junction box 6, a power-on plate 15 is fixedly connected to one side of the conductive plate 14, and the power-on plate 15 is located on the outer side of the junction box 6;

[0037] During operation, the different wires 3 are separated from each other and placed in the wire inlet slot 9. After being placed in the wire inlet slot 9, the conductive plate 14 is moved to squeeze the wires 3 so that the current can pass through the conductive plate 14, the power-carrying plate 15 and the power-carrying contact piece 8, and finally be transferred to the short-circuit overload protection module 5 to complete the circuit transfer work.

[0038] like Figures 2 to 7 As shown, the junction box 6 is provided with an inner groove on one side close to the short-circuit overload protection module 5, the power-on plate 15 is slidably engaged in the inner groove, a protective layer is provided on the outer side of the wire 3, and the exposed parts of the wire 3 are all located inside the wire inlet slot 9;

[0039] During operation, the power-carrying plate 15 is always in the inner groove and slides with the conductive plate 14 to ensure that the circuit can be connected. At the same time, the power-carrying plate 15 will not be exposed to the outside to avoid being touched, and the outward-arched power-carrying contact 8 can contact the power-carrying plate 15 to complete the circuit connection. The protective layer is the leather cover originally provided by the wire 3. The metal part of the leather cover must be completely located in the wire inlet groove 9, which further ensures the safety of use and installation.

[0040] like Figures 2 to 7 As shown, a threaded tube 11 is fixedly connected to the front end of the junction box 6, a screw 13 is threadedly connected in the threaded tube 11, one end of the screw 13 is rotatably connected to the surface of a conductive plate 14, and the conductive plate 14 is slidably clamped in the junction box 6;

[0041] During operation, by rotating the screw rod 13 with a screwdriver, the screw rod 13 can be controlled to rotate and move, thereby controlling the horizontal movement of the conductive plate 14 to achieve squeezing and releasing of the electric wire 3.

[0042] like Figures 2 to 7 As shown, a vertical adjustment plate 24 is provided inside the junction box 6, and the adjustment plate 24 is located on one side of the wire inlet slot 9. A bayonet 19 adapted to the diameter of the wire 3 is provided at the bottom of the adjustment plate 24, and the adjustment plate 24 is slidably engaged with the junction box 6 in the vertical direction;

[0043] During operation, when inserting the wire 3, first pull out the adjustment plate 24 upwards, bend the bottom of the wire 3, put the wire 3 into the wire inlet groove 9, and then put the end of the wire 3 under the bayonet 19, then press the adjustment plate 24 downwards to fix the end of the wire 3, and then the adjustment plate 24 is translated and squeezed. This setting can effectively fix the wire 3 in the wire inlet groove 9, and reduce the deviation of the wire 3 during the squeezing process of the conductive plate 14, which causes the circuit to be unable to form a path.

[0044] like Figures 2 to 7 As shown, a pressing roller 21 is provided on the side of the adjustment plate 24 away from the wire inlet slot 9, a bracket is connected to the outer side of the pressing roller 21, the bracket is rotatably connected to the surface of the adjustment plate 24 through a torsion spring shaft, a rotatable active roller 20 is provided below the pressing roller 21, and a convex strip for squeezing the protective layer of the wire 3 is fixed to the top of the adjustment plate 24;

[0045] During operation, the position where the wire 3 and the conductive plate 14 are in long-term contact is also prone to poor contact due to long-term current passing through. Through the arrangement of the active roller 20 and the pressing roller 21, after the wire 3 is fixed, since the adjustment plate 24 is inserted from top to bottom, the pressing roller 21 and the active roller 20 will squeeze the end of the wire 3, and then slightly loosen the squeezing of the conductive plate 14 on the wire 3, and then rotate the active roller 20 to pull the bottom of the wire 3 toward the adjustment plate 24. Since the convex strips on the top of the adjustment plate 24 will block the protective layer on the outside of the wire 3, the wire 3 entering the wire inlet groove 9 will have its protective layer stripped off by the convex strips, so that the subsequent wire 3 and the conductive plate 14 can be electrically contacted, and the wire 3 that has been used for a long time can be moved to the other side of the adjustment plate 24. Through this arrangement, important parts of the circuit breaker are replaced in all directions, and at the same time, the wire 3 will not be exposed to the outside to cause safety hazards throughout the process.

[0046] like Figures 2 to 7 As shown, the outer side of the junction box 6 is rotatably connected with a cross nail 12, the end of the cross nail 12 is fixedly connected with a large gear 25, one end of the active roller 20 is fixedly connected with a transmission rod 16, and the outer side of the transmission rod 16 is fixedly connected with a driven gear meshing with the large gear 25;

[0047] During operation, the cross nail 12 is rotated by a tool such as a screwdriver to control the rotation of the large gear 25 and the driven gear, thereby driving the transmission rod 16 and the active roller 20 to rotate, thereby completing the squeezing and dragging of the wire 3. The active roller 20 and the pressing roller 21 are both made of insulating materials and will not transmit current.

[0048] like Figures 2 to 7 As shown, an isolation frame 17 is fixedly connected to the interior of the junction box 6, and an isolation area is formed between the isolation frame 17 and the adjustment plate 24. The pressing roller 21 and the active roller 20 are both located in the isolation area. When working, the setting of the isolation frame 17 isolates several independent spaces in the junction box 6 to reduce the influence of the pulled wires 3 on the normal operation of other parts.

[0049] like Figures 2 to 7 As shown, the surface of the isolation frame 17 is provided with an outlet 23 for conveying the electric wire 3, one of the side plates of the isolation frame 17 is used to prevent the electric wire 3 from affecting the large gear 25 and the transmission rod 16, and a deflection block 22 for deflecting the direction of the electric wire 3 is fixedly connected to the inner wall of the junction box 6, and a flip cover 18 rotatably connected to the junction box 6 is provided on one side of the adjustment plate 24;

[0050] During operation, the end of the wire 3 will pass through the wire outlet 23 and enter another area, which is independent of the area where the active roller 20 is located, reducing the impact of the wire 3 on the active roller 20. The flip cover 18 can be rotated upward to open when the adjustment plate 24 is removed, making it easy to remove the adjustment plate 24.

[0051] During operation, the short-circuit overload protection module 5 and the two junction boxes 6 are separated from each other. The interior of the short-circuit overload protection module 5 is used to place the parts used in traditional circuit breakers, such as contacts, electromagnetic coils and springs. When the circuit breaker body 1 needs to be replaced, no matter the parts are aged or damaged, the damaged parts are generally the internal parts of the short-circuit overload protection module 5. It is only necessary to turn off the synchronous switch 4 first to make the circuit no longer connected, and then separate the short-circuit overload protection module 5 from the junction box 6. The junction box 6 remains in place, and the short-circuit overload protection module 5 is taken out to allow the wire 3 to remain fixed in the junction box 6. After that, it is only necessary to install the new short-circuit overload protection module 5 in the original position to complete the replacement work. Through this arrangement, the wire 3 can be kept fixed and not exposed during the replacement of the circuit breaker. The first installation is generally performed by a professional installation master, and the wire 3 is not exposed to the outside during the subsequent installation, which greatly reduces the safety hazards during the installation process and makes the installation process simple and convenient.

[0052] The arrangement of the card slot 2 is the same as the structure of a traditional circuit breaker. Before installing a traditional circuit breaker, a card plate needs to be fixed at the installation location. The shape of the card plate is adapted to the card slot 2, so that the circuit breaker body 1 can be slid into it and adjusted in position. After the circuit breaker body 1 is fixed, the wire 3 is fixed to the junction box 6, and then the junction box 6 is fixed with tools such as screws. When the short-circuit overload protection module 5 needs to be replaced, it is only necessary to slide the short-circuit overload protection module 5 outward from one side, and then slide the new short-circuit overload protection module 5 into the original position, so that the outer arched energized contact piece 8 is connected to the junction box 6, and then the synchronous switch 4 is turned on to complete the replacement work;

[0053] Separate the live and neutral wires 3 and put them into the wire inlet slot 9. Then move the conductive plate 14 to squeeze the wires 3, so that the current can pass through the conductive plate 14, the power plate 15 and the power contact 8, and finally be transferred to the short-circuit overload protection module 5 to complete the circuit transfer work;

[0054] The power-on plate 15 is always in the inner groove and slides with the conductive plate 14 to ensure that the circuit can be connected. At the same time, the power-on plate 15 will not be exposed to the outside to avoid being touched, and the outer arched power-on contact piece 8 can contact the power-on plate 15 to complete the circuit connection. The protective layer is the leather cover originally provided by the wire 3. The metal part of the leather cover needs to be completely located in the wire inlet groove 9, which further ensures the safety of use and installation;

[0055] By rotating the screw 13 with a screwdriver, the screw 13 can be controlled to rotate and move, thereby controlling the horizontal movement of the conductive plate 14 to achieve squeezing and releasing of the wire 3;

[0056] When inserting the wire 3, first pull out the adjustment plate 24 upward, bend the bottom of the wire 3, put the wire 3 into the wire inlet groove 9, let the end of the wire 3 be placed under the bayonet 19, then press the adjustment plate 24 downward to fix the end of the wire 3, and then the adjustment plate 24 is translated and squeezed. This setting can effectively fix the wire 3 in the wire inlet groove 9, and reduce the deviation of the wire 3 during the squeezing process of the conductive plate 14, which causes the circuit to be unable to form a path;

[0057] The position where the wire 3 and the conductive plate 14 are in contact for a long time is also prone to poor contact due to the long-term passage of current. Through the arrangement of the active roller 20 and the pressing roller 21, after the wire 3 is fixed, since the adjustment plate 24 is inserted from top to bottom, the pressing roller 21 and the active roller 20 will squeeze the end of the wire 3, and then slightly loosen the squeezing of the conductive plate 14 on the wire 3, and then rotate the active roller 20 to pull the bottom of the wire 3 toward the adjustment plate 24. Since the convex strips on the top of the adjustment plate 24 will block the protective layer on the outside of the wire 3, the wire 3 entering the wire entry slot 9 will be stripped of the protective layer by the convex strips, so that the subsequent wire 3 and the conductive plate 14 can be electrically contacted, and the wire 3 that has been used for a long time can be moved to the other side of the adjustment plate 24. Through this arrangement, the important parts of the circuit breaker are replaced in all directions, and at the same time, the wire 3 will not be exposed to the outside to cause safety hazards throughout the process;

[0058] By rotating the cross nail 12 with a screwdriver or other tool, the large gear 25 and the driven gear are controlled to rotate, thereby driving the transmission rod 16 and the active roller 20 to rotate, and the extrusion and dragging of the wire 3 can be completed. The active roller 20 and the pressing roller 21 are both made of insulating materials and will not transmit current.

[0059] The isolation frame 17 is provided to isolate several independent spaces in the junction box 6, thereby reducing the influence of the pulled wires 3 on the normal operation of other parts;

[0060] The end of the wire 3 will pass through the wire outlet 23 and enter another area, which is independent of the area where the active roller 20 is located, reducing the impact of the wire 3 on the active roller 20. The flip cover 18 can be rotated upward to open when the adjustment plate 24 is removed, making it easy to remove the adjustment plate 24.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A miniature circuit breaker, characterized in that: The circuit breaker comprises a circuit breaker body (1), the circuit breaker body (1) being composed of two short-circuit overload protection modules (5) arranged in parallel, a synchronous switch (4) for controlling the circuit being installed between the front ends of the two short-circuit overload protection modules (5), the top and bottom of the short-circuit overload protection modules (5) being connected to a junction box (6), the junction box (6) being used to connect external wires (3) and to connect the circuit to the inside of the short-circuit overload protection module (5), the junction box (6) and the short-circuit overload protection module (5) being detachably arranged; A wire entry slot (9) for inserting wires (3) is provided on a side of the junction box (6) away from the short-circuit overload protection module (5); a conductive plate (14) that can be translated is provided on the inner side of the junction box (6); a power-on plate (15) is fixedly connected to one side of the conductive plate (14); and the power-on plate (15) is located on the outer side of the junction box (6); An adjustment plate (24) in a vertical position is arranged inside the junction box (6), the adjustment plate (24) is located on one side of the wire inlet slot (9), a bayonet (19) adapted to the diameter of the wire (3) is provided at the bottom of the adjustment plate (24), and the adjustment plate (24) is slidably engaged with the junction box (6) in the vertical direction; A pressing roller (21) is arranged on the side of the adjustment plate (24) away from the wire inlet slot (9), a bracket is connected to the outer side of the pressing roller (21), the bracket is rotatably connected to the surface of the adjustment plate (24) via a torsion spring shaft, a rotatable active roller (20) is arranged below the pressing roller (21), and a convex strip for squeezing the protective layer of the wire (3) is fixed to the top of the adjustment plate (24); An isolation frame (17) is fixedly connected to the interior of the junction box (6), an isolation area is formed between the isolation frame (17) and the adjustment plate (24), and the pressing roller (21) and the driving roller (20) are both located in the isolation area.

2. A miniature circuit breaker according to claim 1, characterized in that: A card slot (2) is provided at the rear end of the short-circuit overload protection module (5), two slide slots (7) are provided at the top and bottom of the short-circuit overload protection module (5), a card strip (10) adapted to the slide slot (7) is fixedly connected to a side of the junction box (6) close to the short-circuit overload protection module (5), and a power-on contact piece (8) for connecting a circuit is installed at the top and bottom of the short-circuit overload protection module (5), and the power-on contact piece (8) is arranged in an outward arch shape.

3. A miniature circuit breaker according to claim 2, characterized in that: An inner groove is provided on a side of the junction box (6) close to the short-circuit overload protection module (5), the power-on plate (15) is slidably engaged in the inner groove, a protective layer is provided on the outer side of the wire (3), and the exposed parts of the wire (3) are all located inside the wire inlet groove (9).

4. A miniature circuit breaker according to claim 3, characterized in that: A threaded tube (11) is fixedly connected to the front end of the junction box (6), a screw rod (13) is threadedly connected to the threaded tube (11), one end of the screw rod (13) is rotatably connected to the surface of a conductive plate (14), and the conductive plate (14) is slidably engaged in the junction box (6).

5. A miniature circuit breaker according to claim 4, characterized in that: A cross nail (12) is rotatably connected to the outside of the junction box (6), a large gear (25) is fixedly connected to the end of the cross nail (12), a transmission rod (16) is fixedly connected to one end of the active roller (20), and a driven gear meshing with the large gear (25) is fixedly connected to the outside of the transmission rod (16).

6. A miniature circuit breaker according to claim 5, characterized in that: The surface of the isolation frame (17) is provided with an outlet (23) for conveying the electric wire (3); one of the side plates of the isolation frame (17) is used to prevent the electric wire (3) from affecting the large gear (25) and the transmission rod (16); a deflection block (22) for deflecting the direction of the electric wire (3) is fixedly connected to the inner wall of the junction box (6); and a flip cover (18) rotatably connected to the junction box (6) is provided on one side of the adjustment plate (24).

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