Double-breakpoint rapid miniature circuit breaker

Abstract

The invention discloses a double-breakpoint rapid miniature circuit breaker, and relates to the technical field of circuit breakers. The double-breakpoint rapid miniature circuit breaker comprises a double-breakpoint circuit breaker, a switch is arranged on the front face of the double-breakpoint circuit breaker, a wiring end is arranged on the front face of the double-breakpoint circuit breaker, a protection assembly is movably connected to the left side of the double-breakpoint circuit breaker, and an installation assembly is movably connected to the back face of the double-breakpoint circuit breaker. The protection assembly comprises a jacking cam. According to the double-breakpoint rapid miniature circuit breaker, a switch is turned off to drive a jacking cam to rotate, so that a jacking rod drives a connecting rod to move towards the back side along the outer wall of a guide rod, a lower pressing block pushes a baffle plate towards the right side, and then the baffle plate does not cover a screw of a wiring end any more; therefore, the connecting line of the circuit breaker can be disassembled only when the switch is in an off state, and the circuit breaker is prevented from being damaged by electric shock when the circuit is disassembled under the condition that the circuit is forgotten to be closed.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to a double-break fast miniature circuit breaker. Background Technology

[0002] Miniature circuit breakers are protective devices used in low-voltage power distribution systems. They are mainly used for overload and short-circuit protection and are widely used in power distribution lines in homes, offices and small industrial equipment. Their core working principle is that the internal bimetallic strip undergoes thermal deformation when the current is abnormal, triggering the tripping mechanism to cut off the circuit. They are characterized by fast breaking speed and high reliability. Patent application number CN202022897620.3 discloses a dual-break high-breaking-capacity miniature circuit breaker, including a housing, a circuit breaker inner shell, an inlet busbar, an outlet busbar, a circuit breaker body, a left stationary contact, a right stationary contact, a left moving contact, a right moving contact, an operating mechanism, a detachable ventilation cover structure, an adjustable mounting base structure, and a quick-connection operating tube structure. The inner shell of the housing is bolted to the inside of the housing; the inlet busbar and outlet busbar are bolted to the lower left and right sides of the inner shell of the circuit breaker; the circuit breaker body is bolted to the inner shell of the housing; and the left and right stationary contacts are screwed to the middle parts of the left and right sides of the circuit breaker body. When an existing circuit breaker needs maintenance, the power must be disconnected before disconnecting the circuit. If the circuit breaker is disconnected without disconnecting the power, electric shock may occur, posing a danger to the operator. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the present invention provides a dual-break fast miniature circuit breaker to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a double-break fast miniature circuit breaker, comprising a double-break circuit breaker, wherein a switch is provided on the front side of the double-break circuit breaker, a terminal is provided on the front side of the double-break circuit breaker, a protection component is movably connected to the left side of the double-break circuit breaker, and an installation component is movably connected to the back side of the double-break circuit breaker. The protection components include: A top-moving cam is movably connected to the left side of the double-break circuit breaker, and the left side of the switch is movably connected to the top-moving cam. A jacking rod is movably connected to the left side of the double-break circuit breaker, and the jacking rod is located on the back side of the jacking cam. A shielding plate is movably connected inside the double-break circuit breaker and located on the front of the terminal.

[0005] Preferably, a connecting rod is fixedly connected to the outer wall of the jacking rod, and a guide rod is movably connected inside the connecting rod. The guide rod is movably connected to the outer wall of the double-break circuit breaker. Pushing the switch upward will cause the switch to drive the jacking cam to rotate, causing the protruding part of the jacking cam to rotate to the back side, thereby causing the jacking rod to be pushed to the back side by the jacking cam.

[0006] Preferably, both ends of the connecting rod are fixedly connected to pressing blocks, and two baffles are provided, with the two baffles located at the corresponding positions of the pressing blocks.

[0007] Preferably, a first spring is fixedly connected to the right side of each of the shielding plates, and a fixing plate is fixedly connected to the outside of each of the first springs, and the fixing plate is fixedly connected to the outer wall of the double-break circuit breaker.

[0008] Preferably, the mounting assembly includes a mounting base movably connected to the back of the double-break circuit breaker. The mounting base has mounting screw holes on its front side, and the double-break circuit breaker has positioning holes on its front side. When the jacking cam rotates to the rear side, it can push the jacking rod into the positioning hole. Preferably, a shield is fixedly connected to the front of the mounting base at the position corresponding to the wiring terminal. A connector is movably connected inside the shield at the position corresponding to the wiring terminal. A wire is fixedly connected to the bottom of the connector. A conductor plate is fixedly connected inside the shield. The outer wall of the conductor plate is fixedly connected to the wire. When an external cable comes into contact with the conductor plate, it will conduct current to the conductor plate, and then to the wire through the conductor plate, and finally to the connector.

[0009] Preferably, the double-break circuit breaker has an insulating plate movably connected to the top of the conductor plate inside, and a fixing screw is movably connected to the top of the insulating plate, and the fixing screw is movably connected to the shielding frame through threads.

[0010] Preferably, a push-in bracket is fixedly connected to the back of the connector, and an annular hole is provided on the front of the push-in bracket located on the front of the fixing screw. A guide post is fixedly connected to the back of the shielding bracket, and the outer wall of the guide post is movably connected to the push-in bracket. A second spring is provided on the outer wall of the guide post. When the connector is fixed inside the connector end, the push-in bracket will block the top of the fixing screw, so that the screwdriver cannot turn the fixing screw.

[0011] This invention provides a dual-break fast miniature circuit breaker. It has the following advantages: 1. This dual-break fast miniature circuit breaker, by turning off the switch, drives the jacking cam to rotate, causing the jacking rod to move along the outer wall of the guide rod to the back side, so that the lower pressure block pushes the cover plate to the right. This prevents the cover plate from covering the screws at the terminal, so that the circuit breaker's connection line can only be disconnected when the switch is open. This avoids electric shock injury from disconnecting the circuit breaker without turning off the circuit, thus protecting the workers.

[0012] 2. This dual-break fast miniature circuit breaker, by tightening the screws on the terminal, releases the terminal from the fixing of the terminal piece. Under the push of the second spring, the pusher pulls the terminal piece out from inside the terminal along the guide post, and moves the terminal piece into the shielding frame. This prevents workers from coming into contact with the conductive parts of the cable during disassembly, thus protecting the workers.

[0013] 3. This double-break fast miniature circuit breaker prevents the connecting plates from being internally fixed via the terminals when the switch is not closed, thus preventing disassembly of the double-break circuit breaker. Furthermore, when the double-break circuit breaker is fixed to the connecting plates via the terminals, the mounting screw holes are covered by the double-break circuit breaker, preventing the mounting base from being removed. This prevents the double-break circuit breaker from being removed from the fixed structure when the switch is not closed, thus protecting workers from mechanical damage and accidents. Attached Figure Description

[0014] Figure 1 This is a front-view stereoscopic structural diagram of the present invention; Figure 2 This is a schematic diagram of the left-side stereoscopic structure of the present invention; Figure 3 for Figure 2 Enlarged structural diagram of section B; Figure 4 for Figure 2 Enlarged structural diagram of section C; Figure 5 This is a schematic diagram of the rear three-dimensional structure of the present invention; Figure 6 This is a schematic diagram of the jacking rod structure of the present invention; Figure 7 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 8 This is a schematic diagram of the enlarged structure of part D in section 2; Figure 9 This is a schematic diagram of the mounting base structure of the present invention; Figure 10 for Figure 9 Enlarged structural diagram of section E in the middle.

[0015] In the diagram: 1. Double-break circuit breaker; 2. Switch; 3. Terminal; 4. Protection assembly; 401. Pushing cam; 402. Pushing rod; 403. Connecting rod; 404. Guide rod; 405. Lowering block; 406. First spring; 407. Fixing plate; 408. Cover plate; 5. Mounting assembly; 501. Mounting base; 502. Mounting screw hole; 503. Positioning hole; 504. Cover frame; 505. Wire; 506. Conductor plate; 507. Insulating plate; 508. Fixing screw; 509. Connecting piece; 510. Push-in frame; 511. Annular hole; 512. Guide post; 513. Second spring. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0018] Example 1: Please refer to Figure 1-6 The present invention provides a technical solution: a double-break fast miniature circuit breaker, including a double-break circuit breaker 1, a switch 2 is provided on the front of the double-break circuit breaker 1, a terminal block 3 is provided on the front of the double-break circuit breaker 1, a protection component 4 is movably connected to the left side of the double-break circuit breaker 1, and an installation component 5 is movably connected to the back of the double-break circuit breaker 1. Protection component 4 includes: A top-moving cam 401 is movably connected to the left side of the double-break circuit breaker 1, and the left side of the switch 2 is movably connected to the top-moving cam 401. A jacking rod 402 is movably connected to the left side of the double-break circuit breaker 1, and the jacking rod 402 is located on the back side of the jacking cam 401; The shield 408 is movably connected inside the double-break circuit breaker 1 and located on the front of the terminal 3.

[0019] When in normal use, pushing switch 2 upward will cause switch 2 to drive the actuating cam 401 to rotate, causing the protruding part of the actuating cam 401 to rotate to the back side, thereby causing the actuating rod 402 to be pushed to the back side by the actuating cam 401.

[0020] A connecting rod 403 is fixedly connected to the outer wall of the jacking rod 402. A guide rod 404 is movably connected inside the connecting rod 403, and the guide rod 404 is movably connected to the outer wall of the double-break circuit breaker 1.

[0021] When the push rod 402 is pushed, it will move the connecting rod 403 along the outer wall of the guide rod 404 to the back side.

[0022] The connecting rod 403 is fixedly connected to the upper and lower ends with pressure blocks 405. There are two baffles 408, and the two baffles 408 are located at the corresponding positions of the pressure blocks 405.

[0023] When the guide rod 404 is moved to the back side, it will also move the two corresponding pressing blocks 405 to the back side. During the movement, the pressing blocks 405 will push the baffle plate 408 to the right through the inclined surface, so that the baffle plate 408 will no longer cover the screw of the terminal 3, thus preventing the terminal 3 from being disassembled when the power is on.

[0024] Each of the right sides of the shielding plate 408 is fixedly connected to a first spring 406, and each of the outer sides of the first spring 406 is fixedly connected to a fixing plate 407, which is fixedly connected to the outer wall of the double-break circuit breaker 1.

[0025] Pulling switch 2 will cause the actuating cam 401 to rotate in the reverse direction and stop pushing against the actuating cam 401. At this time, the first spring 406, which was previously pushed and compressed by the baffle plate 408, will now reset and push the baffle plate 408 in the opposite direction. The baffle plate 408 will then push the lower pressure block 405 through the inclined plane, so that the actuating rod 402 and the connecting rod 403 will reset. At this time, the baffle plate 408 will no longer block the screw position of the terminal 3, so that the double-break circuit breaker 1 can be disassembled after the power is cut off.

[0026] Example 2: Please refer to Figure 1-10 Based on Embodiment 1, the present invention provides the following technical solution: Mounting component 5 includes mounting base 501, which is movably connected to the back of double-break circuit breaker 1. Mounting base 501 has mounting screw holes 502 on its front side, and double-break circuit breaker 1 has positioning holes 503 on its front side.

[0027] By fixing the mounting base 501 with screws installed in the mounting screw hole 502, and by rotating the push rod 402 to the back side by the push cam 401, the push rod 402 will be inserted into the positioning hole 503.

[0028] A shielding frame 504 is fixedly connected to the front of the double-break circuit breaker 1 at the corresponding position of the terminal 3. A connecting piece 509 is movably connected inside the shielding frame 504 at the corresponding position of the terminal 3. A wire 505 is fixedly connected to the bottom of the connecting piece 509. A conductor plate 506 is fixedly connected inside the shielding frame 504. The outer wall of the conductor plate 506 is fixedly connected to the wire 505.

[0029] When the external cable comes into contact with the conductor plate 506, it conducts current to the conductor plate 506, and then to the wire 505, and finally to the terminal piece 509. When using the circuit breaker, the terminal piece 509 is located inside the terminal 3, and the terminal piece 509 is fixed inside the terminal 3 by the screw on the terminal 3, so that the external circuit can be connected to the double-break circuit breaker 1.

[0030] An insulating plate 507 is movably connected to the top of the conductor plate 506 inside the mounting base 501. A fixing screw 508 is movably connected to the top of the insulating plate 507, and the fixing screw 508 is movably connected to the shielding bracket 504 through threads.

[0031] In use, position the contact head of the external cable between the conductor plate 506 and the insulation plate 507, and tighten the fixing screw 508 to clamp and fix the external electrical contact head between the insulation plate 507 and the conductor plate 506.

[0032] A push-in bracket 510 is fixedly connected to the back of the connector 509. The front of the push-in bracket 510 is provided with an annular hole 511 on the front of the fixing screw 508. A guide post 512 is fixedly connected to the back of the shielding bracket 504, and the outer wall of the guide post 512 is movably connected to the push-in bracket 510. A second spring 513 is provided on the outer wall of the guide post 512. When the connector 509 is fixed inside the connector 3, the push-in bracket 510 will block the top of the fixing screw 508, so that the screwdriver cannot turn the fixing screw 508.

[0033] When it is necessary to disassemble the circuit breaker, first pull down the switch 2 on the double-break circuit breaker 1 to move the shield 408, and then loosen the screw on the terminal 3 to release the fixing of the terminal 3 to the connecting piece 509. Under the push of the second spring 513, the pusher 510 pulls the connecting piece 509 out of the terminal 3 along the guide post 512, and moves the connecting piece 509 into the shield 504 to prevent the staff from contacting the conductive parts of the cable during disassembly.

[0034] When it is necessary to disassemble the mounting base 501, slide the double-break circuit breaker 1 from the mounting base 501 upwards, to the right or to the left, and remove the external cable by turning the fixing screw 508 through the annular hole 511. Then, turn the screw at the mounting screw hole 502 on the mounting base 501 to remove the mounting base 501.

[0035] Without closing switch 2, the connecting piece 509 cannot be contacted and fixed from inside terminal 3 via terminal 3, thus preventing the double-break circuit breaker 1 from being disassembled. At the same time, when the double-break circuit breaker 1 is fixed to the connecting piece 509 via terminal 3, the mounting screw hole 502 will be covered by the double-break circuit breaker 1, thus preventing the mounting base 501 from being disassembled. This prevents the double-break circuit breaker 1 from being removed from the fixed structure when switch 2 is not closed, which could cause mechanical damage and lead to an accident.

[0036] Example 3: Please refer to Figure 1-10 Based on Embodiment 1, the present invention provides the following technical solution: Circuit breaker installation process: First, use the four mounting screw holes 502 on the mounting base 501 to tighten the screws and fix the mounting base 501 in a suitable position. Then, place the connection of the external cable between the insulation plate 507 and the conductor plate 506. Use a screwdriver to pass through the annular hole 511 and tighten the fixing screw 508 to fix the external cable. Then, slide the double-break circuit breaker 1 onto the mounting base 501 from the left or right side and adjust its position. Then, toggle the switch 2 so that the push rod 402 can be inserted into the positioning hole 503. Then, turn off the switch 2, push the push-in bracket 510 to compress the second spring 513, and push the terminal piece 509 into the terminal 3 by the push-in bracket 510. Then, use a screwdriver to tighten the screws in the terminal 3 to fix the terminal piece 509. When all the terminals 3 are fixed, the installation is complete.

[0037] Circuit breaker removal process: Turn off switch 2 so that the shield 408 no longer blocks the screw on terminal 3. Use a screwdriver to loosen the bolt on terminal 3 so that the connecting piece 509 is no longer fixed. The push-in bracket 510 will push the connecting piece 509 out under the push of the second spring 513. At this time, slide the double-break circuit breaker 1 out of the mounting base 501, then loosen the fixing screw 508 to remove the external cable, and then loosen the screw on the mounting screw hole 502 to remove the mounting base 501.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. Double-break fast miniature circuit breaker comprising a double-break circuit breaker (1), characterized in that: The double-break circuit breaker (1) is provided with a switch (2) on the front side, and is provided with a wiring terminal (3) on the front side, and is movably connected with a protection assembly (4) on the left side, and is movably connected with a mounting assembly (5) on the back side; The protection assembly (4) comprises: A knock cam (401) is movably connected on the left side of the double-break circuit breaker (1), and the left side of the switch (2) is movably connected with the knock cam (401); A knock rod (402) is movably connected on the left side of the double-break circuit breaker (1), and the knock rod (402) is located on the back side of the knock cam (401); A shielding plate (408) is movably connected inside the double-break circuit breaker (1) and located on the front side of the wiring terminal (3).

2. The dual-break quick-dip breaker of claim 1, wherein: The knock rod (402) is movably connected with a connecting rod (403) on the outer wall, and the connecting rod (403) is movably connected with a guide rod (404) inside, and the guide rod (404) is movably connected on the outer wall of the double-break circuit breaker (1).

3. The dual-break quick-dip breaker of claim 2, wherein: The connecting rod (403) is movably connected with a knock rod (402) on the outer wall, and the knock rod (402) is movably connected with a guide rod (404) inside, and the guide rod (404) is movably connected on the outer wall of the double-break circuit breaker (1).

4. The dual-break quick-dip breaker of claim 1, wherein: The connecting rod (403) is movably connected with a knock rod (402) on the outer wall, and the knock rod (402) is movably connected with a guide rod (404) inside, and the guide rod (404) is movably connected on the outer wall of the double-break circuit breaker (1).

5. The dual-break quick-dip breaker of claim 1, wherein: The connecting rod (403) is movably connected with a knock rod (402) on the outer wall, and the knock rod (402) is movably connected with a guide rod (404) inside, and the guide rod (404) is movably connected on the outer wall of the double-break circuit breaker (1).

6. The dual-break quick-dip breaker of claim 5, wherein: The mounting assembly (5) comprises a mounting seat (501) movably connected on the back of the double-break circuit breaker (1), and is provided with a mounting screw hole (502) on the front side, and is provided with a positioning hole (503) on the front side.

7. The dual-break quick-dip breaker of claim 6, wherein: The mounting seat (501) is movably connected with a shielding frame (504) on the front side and located on the corresponding position of the wiring terminal (3), and is movably connected with a wiring piece (509) inside the shielding frame (504) and located on the corresponding position of the wiring terminal (3), and is movably connected with a conductor plate (506) inside the shielding frame (504).

8. The dual-break quick-dip breaker of claim 6, wherein: The double-break circuit breaker (1) is movably connected with an insulating plate (507) inside and located on the top of the conductor plate (506), and is movably connected with a fixing screw (508) on the top of the insulating plate (507), and the fixing screw (508) is movably connected with the shielding frame (504) through threads. The wiring piece (509) is movably connected with a push-in frame (510) on the back side, and the push-in frame (510) is movably connected with a guide column (512) on the outer wall and the push-in frame (510) is movably connected with the guide column (512) on the outer wall, and the guide column (512) is movably connected with a second spring (513) on the outer wall.

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