Miniature circuit breaker

Abstract

The application discloses a small circuit breaker and belongs to the technical field of circuit breakers. The circuit breaker comprises a circuit breaker main body, connecting holes integrally formed on the upper and lower ends of the circuit breaker main body, a clamping connecting mechanism arranged in the connecting holes, two moving rods, a plurality of inclined clamping plates fixed on the opposite sides of the two moving rods, a U-shaped frame arranged in the connecting holes, two ends of the U-shaped frame in contact with two groups of inclined clamping plates, two fastening screws screwed in the circuit breaker main body, and an observation mechanism arranged in the circuit breaker main body. The power line is inserted into the connecting holes and located between the two groups of inclined clamping plates. Then, the fastening screws are rotated by using a screwdriver. The rotation of the fastening screws moves the U-shaped frame. The U-shaped frame extrudes the two groups of inclined clamping plates to clamp the power line. The plurality of inclined clamping plates extrude the power line to disperse the extruding pressure, so that the wire core is not easily damaged, and the power line is clamped and accurately clamped.

Description

Technical Field

[0001] This application relates to the field of circuit breaker technology, and more particularly to miniature circuit breakers. Background Technology

[0002] The published patent document CN209708926U discloses a miniature circuit breaker. The handle includes a lever and a swinging part. A clamping element is fixed to the lever. The clamping element includes a strip-shaped clamping body with at least two clamps. The clamping body has a slot for the clamps to engage. A through-slot is provided on the side wall of the slot, penetrating the clamps. Each clamp includes a first clamp and a second clamp. The first clamp has a through-hole. A spring is provided between the second clamp and the inner wall of the slot, causing the first and second clamps to clamp and abut against each other. A pressing block is inserted into the through-slot, passing through the through-hole on the first clamp and fixed to the second clamp. The other ends of the first and second clamps near the pressing block extend outside the slot. The clamping body has a concave annular groove located between two adjacent clamps. The improved design connects the handles of multiple circuit breakers into a single unit, allowing for individual disassembly and replacement. Utility Model Content

[0003] In view of the shortcomings of the prior art, this application provides a miniature circuit breaker that overcomes the deficiencies of the prior art and aims to solve the problems in the prior art.

[0004] To achieve the above objectives, this application provides the following technical solution: a miniature circuit breaker, comprising a circuit breaker body, wherein both the upper and lower ends of the circuit breaker body are integrally formed with connection holes, and a clamping connection mechanism is provided inside the connection holes, the clamping connection mechanism comprising two moving rods, and multiple inclined clamping plates are fixed on opposite sides of the two moving rods, a U-shaped frame is provided inside the connection holes, and the two ends of the U-shaped frame are respectively in contact with two sets of inclined clamping plates, two fastening screws are screwed into the inside of the circuit breaker body, and an observation mechanism is provided inside the circuit breaker body.

[0005] By adopting the above technical solution, the power cord is inserted into the connection hole and positioned between two sets of inclined clamps. Then, a screwdriver is used to turn the fastening screw. The turning and moving of the fastening screw causes the U-shaped frame to move. The U-shaped frame squeezes the two sets of inclined clamps together and clamps the power cord. The pressure of multiple inclined clamps on the power cord is dispersed, making it less likely to damage the wire core. The clamping of the power cord is accurate.

[0006] As a preferred technical solution of this application, spring holes are provided on the opposite sides of the two moving rods, and a tension spring is fixed inside the spring hole. The other end of the tension spring is fixedly connected to the inner wall of the connecting hole.

[0007] By adopting the above technical solution, when the fastening screw is reversed, the U-shaped frame no longer squeezes the inclined clamping plate, and the tension spring will take the moving rod and the inclined clamping plate back to their original position, no longer clamping the power cord.

[0008] As a preferred technical solution of this application, the U-shaped frame has multiple limiting grooves inside, and a limiting rod is provided inside the limiting groove. The limiting rod is fixedly connected to the inner wall of the connecting hole.

[0009] By adopting the above technical solution, the limiting rod restricts the movement direction of the U-shaped frame and prevents the U-shaped frame from rotating.

[0010] As a preferred technical solution of this application, a circular block runs through the interior of the U-shaped frame, one end of the circular block is fixedly connected to a fastening screw, an annular groove is formed on the outer side wall of the circular block, and a limiting ring is fitted on the outer side of the annular groove.

[0011] By adopting the above technical solution, the U-shaped frame and the fastening screw are connected together, and the movement of the fastening screw moves the U-shaped frame.

[0012] As a preferred technical solution of this application, multiple through slots are distributed at both ends of the U-shaped frame, and the through slots correspond to the gaps between the two inclined clamps.

[0013] By adopting the above technical solution, after the inclined clamps are closed together, their ends will pass through the slot, and the U-shaped frame will not obstruct the movement of the inclined clamps.

[0014] As a preferred technical solution of this application, the two sets of inclined clamps are staggered with each other, and the gaps between the two sets of inclined clamps correspond to the gaps between the other two sets.

[0015] By adopting the above technical solution, the two sets of inclined clamps interlock without hitting each other, and clamp the thin power cord together.

[0016] As a preferred technical solution of this application, the observation mechanism includes transparent plastic, and the outer shell of the circuit breaker body has an observation port, with the transparent plastic fixed inside the observation port.

[0017] By adopting the above technical solution, the internal condition of the circuit breaker body can be observed through transparent plastic to understand the internal condition of the circuit breaker and determine its usage status.

[0018] As a preferred technical solution of this application, a miniature light is provided inside the circuit breaker body at the observation port, and the miniature light is fixedly connected to the main board inside the circuit breaker body.

[0019] By adopting the above technical solution, the miniature lighting illuminates the interior of the circuit breaker body, increasing the brightness inside the circuit breaker body and making it easier to see.

[0020] The beneficial effects of this application are: 1. Insert the power cord into the connection hole, between the two sets of inclined clamps. Then, use a screwdriver to turn the fastening screw. The turning of the fastening screw moves the U-shaped frame, which squeezes the two sets of inclined clamps together and clamps the power cord. The pressure of multiple inclined clamps on the power cord is distributed, which is less likely to damage the wire core. The clamping of the power cord is accurate.

[0021] 2. Observe the inside of the circuit breaker body through the transparent plastic to understand the internal condition of the circuit breaker and determine its usage status. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the top cross-sectional structure of this application; Figure 3 This is a schematic diagram of the clamping connection mechanism structure of this application; Figure 4 This is a schematic cross-sectional view of the U-shaped frame structure in this application; Figure 5 This is a schematic diagram of the U-shaped frame and limiting ring structure of this application; Figure 6 This is a schematic diagram of the main structure of the circuit breaker in this application.

[0023] In the diagram: 1. Circuit breaker body; 2. Observation mechanism; 201. Transparent plastic; 202. Observation port; 203. Miniature light; 3. Connection hole; 4. Clamping connection mechanism; 401. Fastening screw; 402. U-shaped frame; 403. Inclined clamping plate; 404. Spring hole; 405. Tension spring; 406. Limiting rod; 407. Through slot; 408. Moving rod; 409. Limiting slot; 410. Round block; 411. Ring groove; 412. Limiting ring. Detailed Implementation

[0024] The technical solutions in 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, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] Reference Figures 1-6A miniature circuit breaker includes a circuit breaker body 1. Both the upper and lower ends of the circuit breaker body 1 are integrally formed with connection holes 3. A clamping connection mechanism 4 is provided inside the connection holes 3. The clamping connection mechanism 4 includes two moving rods 408, and multiple inclined clamping plates 403 are fixed to opposite sides of the two moving rods 408. A U-shaped frame 402 is provided inside the connection holes 3, with both ends of the U-shaped frame 402 contacting the two sets of inclined clamping plates 403 respectively. Two fastening screws 401 are screwed into the inside of the circuit breaker body 1. An observation mechanism 2 is provided inside the circuit breaker body 1. A power cord is inserted into the connection holes 3, positioned between the two sets of inclined clamping plates 403. Then, a screwdriver is used to rotate the fastening screws 401, causing the U-shaped frame 402 to move. The U-shaped frame 402 presses against the two sets of inclined clamping plates 403, clamping the power cord. The pressure from the multiple inclined clamping plates 403 is dispersed, preventing damage to the wire core, and accurately clamping the power cord.

[0026] Both moving rods 408 have spring holes 404 on opposite sides. A tension spring 405 is fixed inside the spring hole 404. The other end of the tension spring 405 is fixedly connected to the inner wall of the connecting hole 3. When the fastening screw 401 is reversed, the U-shaped frame 402 no longer squeezes the inclined clamp 403. The tension spring 405 will take the moving rod 408 and the inclined clamp 403 back to their original position and no longer clamp the power cord.

[0027] Reference Figures 2-5 The U-shaped frame 402 has multiple limiting grooves 409 inside, and a limiting rod 406 is provided inside the limiting groove 409. The limiting rod 406 is fixedly connected to the inner side wall of the connecting hole 3. The limiting rod 406 restricts the movement direction of the U-shaped frame 402 and prevents the U-shaped frame 402 from rotating. A circular block 410 passes through the inside of the U-shaped frame 402. One end of the circular block 410 is fixedly connected to the fastening screw 401. An annular groove 411 is provided on the outer side wall of the circular block 410. A limiting ring 412 is fitted on the outer side of the annular groove 411, so that the U-shaped frame 402 and the fastening screw 401 are connected together. When the fastening screw 401 moves, it moves the U-shaped frame 402. The two ends of the U-shaped frame 402 are provided with multiple through slots 407. The through slots 407 correspond to the gaps between the two inclined clamps 403. After the inclined clamps 403 are closed, their ends will pass through the through slots 407. The U-shaped frame 402 will not block the movement of the inclined clamps 403. The two sets of inclined clamps 403 are interlaced with each other. The two sets of inclined clamps 403 correspond to the gaps between each other. The two sets of inclined clamps 403 are interlaced but will not abut each other, and they close to clamp the thin power cord.

[0028] Reference Figure 1 and Figure 6The observation mechanism 2 includes a transparent plastic 201. The outer shell of the circuit breaker body 1 has an observation port 202. The transparent plastic 201 is fixed inside the observation port 202. The internal condition of the circuit breaker body 1 can be observed through the transparent plastic 201 to understand the internal condition of the circuit breaker and determine the usage status of the circuit breaker. A miniature light 203 is provided inside the circuit breaker body 1 at the observation port 202. The miniature light 203 is fixedly connected to the main board inside the circuit breaker body 1. The miniature light 203 illuminates the inside of the circuit breaker body 1, increasing the brightness inside the circuit breaker body 1 and making it easier to observe.

[0029] Working principle: Insert the prepared power cord end into the connection holes 3 at both ends of the circuit breaker and place it between the two sets of inclined clamps 403. Tighten the fastening screw 401 with a screwdriver. When the screw is screwed in, its head pushes inward, applying an inward pushing force to the U-shaped frame 402. The U-shaped frame 402 moves under the action of the pushing force. The two ends of the U-shaped frame 402 contact the two sets of inclined clamps 403 respectively. Therefore, the movement of the U-shaped frame 402 will directly push the two sets of inclined clamps 403 to slide along their inclined surfaces towards the center. The linear movement of the U-shaped frame 402 is converted into the horizontal opposing movement of the two moving rods 408 by the inclined surfaces of the inclined clamps 403. The two moving rods 408 move towards each other, causing all the inclined clamps 403 on them to close synchronously. Multiple inclined clamps 403 close from both sides at the same time, forming a multi-point, uniform clamping force. The clamping mechanism works together to hold the power cord tightly. Multiple contact points distribute the clamping force across different locations on the power cord surface, effectively preventing damage to the wire core due to excessive pressure at a single point. When it is necessary to loosen the power cord, loosen the fastening screw 401. The screw comes out and releases the pressure on the U-shaped frame 402. At this time, the tension spring 405, which was originally in a stretched state, begins to release its elastic potential energy. One end of the tension spring 405 is fixed in the spring hole 404, and the other end is fixed on the inner wall of the connecting hole 3. Its contraction elastic force will pull the two moving rods 408, causing them to move in opposite directions. The reset of the moving rods 408 causes the inclined clamping plate 403 on it to slide back to its initial position along the inclined plane. The two sets of clamping plates then separate, opening up space, and the power cord can be easily removed. This reset process ensures that the clamping mechanism can automatically and quickly disengage, preparing for the next installation. Among them, the limiting rod 406 restricts the movement direction of the U-shaped frame 402 and prevents the U-shaped frame 402 from rotating. The round block 410 and the limiting ring 412 connect the U-shaped frame 402 and the fastening screw 401 together. The movement of the fastening screw 401 moves the U-shaped frame 402. At the same time, after the inclined clamps 403 close together, their ends will pass through the slots 407. The U-shaped frame 402 will not block the movement of the inclined clamps 403, and the two sets of inclined clamps 403 interlock with each other without abutting each other, closing to clamp the thin power cord. In addition, the internal condition of the circuit breaker body 1 can be observed through the transparent plastic 201 to understand the internal condition of the circuit breaker and determine its usage status. The miniature light 203 illuminates the inside of the circuit breaker body 1, increasing the brightness inside the circuit breaker body 1 for easy viewing.

[0030] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A miniature circuit breaker, comprising a circuit breaker body (1), characterized in that, The circuit breaker body (1) has integrally formed connection holes (3) at both the upper and lower ends. The connection holes (3) are equipped with clamping connection mechanisms (4). The clamping connection mechanisms (4) include two moving rods (408). Multiple inclined clamps (403) are fixed on the opposite sides of the two moving rods (408). The connection holes (3) are equipped with U-shaped frames (402). The two ends of the U-shaped frames (402) are in contact with two sets of inclined clamps (403). The circuit breaker body (1) is screwed with two fastening screws (401). The circuit breaker body (1) is equipped with an observation mechanism (2).

2. The miniature circuit breaker according to claim 1, characterized in that, Spring holes (404) are provided on opposite sides of the two moving rods (408). A tension spring (405) is fixed inside the spring hole (404), and the other end of the tension spring (405) is fixedly connected to the inner wall of the connecting hole (3).

3. The miniature circuit breaker according to claim 1, characterized in that, The U-shaped frame (402) has multiple limiting grooves (409) inside, and a limiting rod (406) is provided inside the limiting groove (409). The limiting rod (406) is fixedly connected to the inner wall of the connecting hole (3).

4. The miniature circuit breaker according to claim 1, characterized in that, The U-shaped frame (402) has a circular block (410) running through its interior. One end of the circular block (410) is fixedly connected to a fastening screw (401). The outer side wall of the circular block (410) is provided with an annular groove (411), and a limiting ring (412) is fitted on the outer side of the annular groove (411).

5. The miniature circuit breaker according to claim 1, characterized in that, The U-shaped frame (402) has multiple through slots (407) distributed at both ends, and the through slots (407) correspond to the gaps between the two inclined clamps (403).

6. The miniature circuit breaker according to claim 1, characterized in that, The two sets of inclined clamps (403) are interlocked, and the two sets of inclined clamps (403) correspond to the gap between each other.

7. The miniature circuit breaker according to claim 1, characterized in that, The observation mechanism (2) includes a transparent plastic (201), and the outer shell of the circuit breaker body (1) has an observation port (202), and the transparent plastic (201) is fixed inside the observation port (202).

8. The miniature circuit breaker according to claim 7, characterized in that, The circuit breaker body (1) is equipped with a miniature lighting lamp (203) located at the observation port (202) inside, and the miniature lighting lamp (203) is fixedly connected to the main board inside the circuit breaker body (1).

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