Experiment button electricity taking structure of circuit breaker

Abstract

The utility model discloses an experiment button electricity taking structure of a circuit breaker. The structure comprises a circuit breaker bottom shell, a tripping mechanism, an experiment button, a reset elastic piece, an electricity taking torsion spring, an electricity taking sheet and the like. The electricity taking torsion spring is sleeved on the bore log, an upper end electricity taking part of the electricity taking torsion spring is located above the electricity taking piece, a lower end connecting part extends to the side face of the moving contact, the connecting part is electrically connected with the moving contact in a contact mode only when the circuit breaker is switched on, and the electricity taking part can be electrically connected with the electricity taking piece by pressing the experiment button downwards. The structure has the beneficial effects of being capable of reducing the risk of mistaken electric shock, preventing accidental electrification hazards and avoiding misjudgment faults, exquisite and reasonable in structure, tight in matching of all parts, capable of utilizing the simple mechanical and electrical cooperation principle, free of complex circuits and algorithms, conventional in material, common in process, low in cost, capable of improving the safety, reliability and practicability of the circuit breaker and suitable for popularization and application. The method has significant advantages in the field of power system safety protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of circuit breaker, concretely is an experimental button power taking structure of circuit breaker. BACKGROUND

[0002] In the field of safety protection of power systems, circuit breakers play a crucial role. It can automatically cut off the circuit when the circuit is overloaded, short-circuited or has a leakage fault, protecting electrical equipment and personnel safety. Among them, the experimental button is a key component for detecting whether the leakage protection function of the circuit breaker is normal.

[0003] With the development of power technology and the increasing demand for electrical safety, the existing circuit breakers gradually expose some shortcomings in the design of experimental button related circuits. Currently, the traditional circuit breaker does not fully consider the reasonable correlation between experimental button power taking and circuit breaker closing and opening state in design. In some cases, whether the circuit breaker is in the closing or opening state, the power taking and circuit conduction logic when pressing the experimental button are relatively simple.

[0004] For example, some existing circuit breakers can still conduct the experimental circuit when the experimental button is pressed in the opening state. This phenomenon can cause many problems: on the one hand, from the safety point of view, if the experimental circuit is conducted in the opening state, it may make part of the circuit live, increasing the risk of accidental electric shock for maintenance personnel when they are repairing or maintaining the circuit. Maintenance personnel often believe that the circuit is not live when the circuit breaker is in the opening state, but due to the experimental button opening conduction problem, it may cause accidental electric shock. On the other hand, from the perspective of equipment operation stability, unnecessary experimental circuit conduction when opening may cause the misoperation of leakage tripping devices and other components. This misoperation may cause unnecessary wear and impact on the mechanical structure and electronic components inside the circuit breaker, reducing its service life and reliability. At the same time, if in some places where the continuity of power supply is required, such as the power supply lines of important medical equipment in hospitals, the power supply systems of data center server rooms, etc., the accidental tripping of the circuit breaker caused by the conduction of the experimental button when opening may cause the interruption of equipment operation, data loss and other serious consequences, causing great economic loss and inconvenience to users.

[0005] In addition, the existing technology lacks a simple and effective mechanism in the design of experimental button power taking structure, which can accurately control the experimental button to take power and conduct the experimental circuit only in the closing state of the circuit breaker, to effectively detect the leakage protection function, while reliably cutting off the connection between the experimental circuit and the power supply in the opening state, to avoid potential safety hazards and equipment operation interference. Therefore, there is an urgent need for a new type of circuit breaker experimental button power taking structure to overcome the above-mentioned deficiencies of the existing technology, to improve the safety, reliability and practicality of the circuit breaker, to better adapt to the complex needs of modern power systems. Utility model content

[0006] In view of the deficiencies in the prior art, the utility model provides an experimental button power taking structure of circuit breaker.

[0007] The utility model employs the technical scheme, an experimental button power taking structure of circuit breaker, including circuit breaker bottom shell, tripping mechanism and experimental button, the tripping mechanism includes contact seat, lock catch and movable contact, still include reset elastic part, power taking torsional spring and power taking piece, the power taking piece is connected on the circuit breaker bottom shell, the power taking torsional spring is sleeved on the hole column on the circuit breaker bottom shell, the upper end of power taking torsional spring has the power taking part above the power taking piece, the lower end of power taking torsional spring has the connecting part extending to movable contact side surface, when experimental button is pressed down, experimental button can press down power taking part and make power taking part and power taking piece abut and realize electric connection, the connecting part can only contact movable contact and realize electric connection when circuit breaker is closed.

[0008] Further, the positioning mechanism for positioning the connecting part is further included.

[0009] Further, the positioning mechanism includes a guide column one below the hole column and a guide column two and a guide column three arranged at intervals and obliquely below the guide column one, and the connecting part of the power taking torsional spring extends from the side surface of the guide column one and the clamping groove between the guide column two and the guide column three to the side surface of the movable contact.

[0010] Further, the connecting part has a hook portion.

[0011] Further, one side of the experimental button extends a pressing action portion, and the pressing action portion is provided with a fitting opening engaged with the power taking portion.

[0012] Further, a spring step is arranged on the circuit breaker bottom shell below the experimental button, one end of the reset elastic part is connected with the spring step, and the other end is connected with the lower end of the experimental button.

[0013] Further, the spring step has a spring hole connected with the reset elastic part, and the lower end of the experimental button has a spring column connected with the reset elastic part.

[0014] Further, the power taking piece is electrically connected with a first wiring terminal of the circuit breaker through a wire, and the movable contact is electrically connected with a second wiring terminal of the circuit breaker.

[0015] Further, a magnetic ring is further included, and the wire is electrically connected with the first wiring terminal after winding through the magnetic ring.

[0016] Further, a resistor is further connected on the wire.

[0017] The utility model has the advantages that:

[0018] 1. Reduce the risk of electric shock: by the unique power supply structure design, ensure that in the circuit breaker tripping, even if the experimental button is pressed, due to the lower end of the power supply torsion spring connection part and the moving contact in the tripping state without contact electric connection, and the power supply part and the power supply sheet cannot form an effective power supply path, so that the experimental circuit will not be turned on. In this way, the probability of electric shock caused by accidental contact with the live experimental circuit during the operation of circuit maintenance, maintenance and other operations is greatly reduced, which provides a strong guarantee for the personal safety of the operators.

[0019] 2. Prevent accidental live hazards: effectively avoid other related safety problems that may be caused by the misdirected experimental circuit in the tripping state, such as avoiding the misoperation of the surrounding electrical equipment caused by accidental live, fire hazards, etc., so that the entire power system is in a more safe and stable no electricity state during the circuit breaker tripping, which meets the electrical safety operation specification and requirement.

[0020] 3. Avoid misjudgment of faults: accurate power supply control logic makes the state detection of the circuit breaker more accurate. In the tripping state, there will be no false circuit signal or element action caused by the pressing of the experimental button, which avoids the misjudgment of these non-real fault signals as faults of the circuit breaker itself, which is beneficial to the accurate judgment of the performance and state of the circuit breaker by the maintenance personnel, timely discovery and processing of the real problems, and improvement of the maintenance efficiency and quality of the power system.

[0021] 4. Simple structure, low cost: the circuit breaker experimental button power supply structure of the utility model has obvious advantages, its layout is exquisite and reasonable, the power supply torsion spring, the power supply sheet, the reset elastic element and the like are orderly arranged in the limited space of the circuit breaker bottom shell, and are closely matched without interference redundancy, so that the space is efficiently utilized and the mechanical strength and stability are improved; the working principle is based on simple machinery and electrical cooperation, the experimental circuit is turned on and cut off by the deformation of the power supply torsion spring and the contact separation of the moving contact and the power supply sheet, without complex electronic circuit and algorithm, which is easy to understand and operate, reduces the technical requirements of production and maintenance personnel, and reduces the troubleshooting difficulty; and because the structure is reasonable and the principle is simple, conventional metal and plastic are used, common stamping, injection molding and assembly processes are adopted, the raw material, processing and assembly costs are greatly reduced compared with the traditional design, the cost performance is high, the price advantage is obvious in market competition, and the utility model is beneficial to wide application and provides an economical and practical solution for the safety protection of the power system.

[0022] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a partial schematic view of the utility model.

[0024] Figure 2 It is a structural schematic view of the experimental button.

[0025] Figure 3 It is a structural schematic view of the utility model.

[0026] Figure 4 It is a schematic view of contact connection between the closing state static contact and the connecting part.

[0027] Figures 1-4 1, circuit breaker bottom shell; 2, experimental button; 3, contact seat; 4, lock catch; 5, moving contact; 6, reset elastic member; 7, power taking torsion spring; 8, power taking sheet; 9, hole column; 10, power taking part; 11, connecting part; 12, guide column one; 13, guide column two; 14, guide column three; 15, hook part; 16, pressing action part; 17, fitting mouth; 18, spring step; 19, spring hole; 20, spring column; 21, wire; 22, first wiring end; 23, second wiring end; 24, magnetic ring; 25, resistance. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indications also change accordingly.

[0030] The utility model provides a kind of experimental button power taking structure of circuit breaker.

[0031] In the embodiment, refer to Figures 1-4The experimental button power taking structure of the circuit breaker comprises a circuit breaker bottom shell 1, a tripping mechanism and an experimental button 2, the tripping mechanism comprises a contact seat 3, a lock catch 4 and a moving contact 5, further comprises a reset elastic element 6, a power taking torsional spring 7 and a power taking sheet 8, the power taking sheet 8 is connected on the circuit breaker bottom shell, the power taking torsional spring 7 is sleeved on a hole column 9 on the circuit breaker bottom shell, the upper end of the power taking torsional spring 7 has a power taking part 10 above the power taking sheet, the lower end of the power taking torsional spring 7 has a connecting part 11 extending to the side surface of the moving contact, when the experimental button is pressed down, the experimental button can press down the power taking part to make the power taking part contact the power taking sheet to realize the electrical connection, the connecting part can only contact the moving contact to realize the electrical connection when the circuit breaker is closed.

[0032] In the above technical solution, through the ingenious cooperation of the power taking torsional spring, the experimental button, the power taking sheet and the moving contact, effective control of the power taking of the experimental button is realized. When the experimental button is pressed down, the electrical connection of the power taking part and the power taking sheet can be triggered accurately, and according to the opening and closing state of the circuit breaker, whether the connecting part contacts the moving contact determines whether the experimental circuit is completely conducted, which ensures that the experimental circuit can normally take power due to the operation of the experimental button only when the circuit breaker is closed, effectively avoids the risk of abnormal conduction of the circuit caused by the misoperation of the experimental button in the open state, improves the safety and reliability of the operation of the circuit breaker, and reasonably utilizes the internal space of the circuit breaker, making the overall structure more compact and orderly.

[0033] Among them, since the connecting part is arranged on the side surface of the moving contact, when the moving contact is not closed, the connecting part does not contact the moving contact, and the two are not conducted. Therefore, even if the experimental button is pressed down, a path will not be formed. Only when the moving contact is closed, the moving contact is close to the connecting part, so that the moving contact and the connecting part are in contact to realize the electrical connection of the two. At this time, if the experimental button is pressed down, an experimental path will be formed.

[0034] The working principle of the experimental button power taking structure of the circuit breaker is as follows:

[0035] When the circuit breaker is in the closed state, the moving contact is in the closed position, and the connecting part at the lower end of the power taking torsional spring can contact and electrically connect with the moving contact. At this time, if the experimental button is pressed down, the pressing part of the experimental button will press down the power taking part of the power taking torsional spring, so that the power taking part is in contact with the power taking sheet to realize the electrical connection. The current path is formed from the first wiring end of the circuit breaker, through the power taking sheet, the power taking torsional spring, the connecting part and the moving contact to the second wiring end, thereby providing power for the experimental circuit to perform related detection such as leakage protection function.

[0036] When the circuit breaker is in the open state, the moving contact is separated, although the experimental button can make the power taking part contact the power taking sheet, but the connecting part does not contact the moving contact, so that a complete current loop cannot be formed, and the experimental circuit will not be conducted.

[0037] Specifically, the positioning mechanism is arranged to position the connecting part.

[0038] In the embodiment, the arrangement of the positioning mechanism can accurately define the position of the connecting part of the power taking torsion spring, so that the connecting part always maintains a stable and accurate spatial posture in various operating states and operating processes of the circuit breaker. This not only helps to ensure that the connecting part and the movable contact are in reliable electrical connection when the circuit breaker is closed, and are stably separated when the circuit breaker is opened, avoiding abnormal power taking or electrical failure caused by displacement or shaking of the connecting part, but also improves the mechanical stability and electrical performance consistency of the entire power taking structure, reduces the risk of performance fluctuations caused by part position deviation, improves the quality and reliability of the product, prolongs the service life of the product, and reduces the maintenance and repair work that may be caused by unstable structure.

[0039] Specifically, the positioning mechanism includes a guide column one 12 located below the hole column, and a guide column two 13 and a guide column three 14 arranged at intervals and obliquely below the guide column one 12. The connecting part of the power taking torsion spring extends from the side of the guide column one and the gap between the guide column two and the guide column three to the side of the movable contact 5.

[0040] In the embodiment, the positioning structure composed of the guide column one, the guide column two and the guide column three provides a specific guide and limiting path for the connecting part of the power taking torsion spring. The connecting part extends from the side of the guide column one and the gap between the guide column two and the guide column three to the side of the movable contact. This layout makes the connecting part be clearly constrained and guided during movement, ensuring that it can accurately cooperate with the movable contact during the opening and closing actions of the circuit breaker and the operation of the experimental button, further enhancing the reliability and stability of the power taking structure, while simplifying the assembly process. Because the guide column structure can be integrally formed or simply assembled during the production of the circuit breaker bottom shell, it is convenient for mass production, reduces production cost and improves production efficiency.

[0041] Specifically, the connecting part has a hook portion 15.

[0042] In the embodiment, the hook portion arranged on the connecting part can enhance the contact stability and electrical connection reliability between the connecting part and the movable contact. When the circuit breaker is closed, the hook portion can better hang the movable contact or form a close cooperation with the movable contact, reducing electrical sparks, heating and other problems caused by poor contact, thereby reducing the risk of circuit failure caused by poor contact, improving the stability and accuracy of the experimental circuit during normal detection operation, ensuring the effectiveness of the detection of the leakage protection function of the circuit breaker, and also helping to prolong the service life of the movable contact and the connecting part.

[0043] Specifically, one side of the experimental button extends a pressing action portion 16, and the pressing action portion 16 is provided with a fitting mouth 17 engaged with the power taking part.

[0044] In the embodiment, the pressing part extending from one side of the test button and the matching hole arranged thereon for clamping the power taking part enable the test button to transmit force to the power taking part of the power taking torsion spring more stably and effectively during the pressing operation. When the test button is pressed, the clamping of the matching hole and the power taking part ensures the accuracy of the force transmission direction and the action point, so that the power taking part can accurately contact the power taking sheet to realize electrical connection according to the design requirement, avoids the failure or abnormality of power taking due to the dispersion or deviation of force during the pressing process, improves the sensitivity and reliability of the test button operation, optimizes the user operation experience, and makes the detection operation of the leakage protection function of the circuit breaker more convenient, efficient and accurate.

[0045] Specifically, the spring step 18 is arranged on the circuit breaker bottom shell below the test button, one end of the reset elastic member is connected with the spring step 18, and the other end is connected with the lower end of the test button.

[0046] In the embodiment, the spring step on the circuit breaker bottom shell below the test button and the reset elastic member connected therewith provide reliable reset function for the test button. After the test button is released, the reset elastic member can quickly restore the test button to the initial position, simultaneously driving the power taking part of the power taking torsion spring to be separated from the contact with the power taking sheet, and timely cutting off the test circuit, so as to ensure that the test circuit is in the off state in the non-detection state, improve the safety of the circuit, and the structure design is simple and effective, without the need for complex mechanical or electronic reset device, thereby reducing the production cost and structural complexity, improving the stability and reliability of the product, and reducing the risk of equipment abnormality caused by reset failure.

[0047] Specifically, the spring step 18 has the spring hole 19 connected with the reset elastic member, and the lower end of the test button has the spring column 20 connected with the reset elastic member.

[0048] In the embodiment, the spring hole on the spring step and the spring column at the lower end of the test button respectively provide stable connection points for the two ends of the reset elastic member, so that the reset elastic member always maintains the correct stress posture and stable connection state during the pressing and resetting of the test button. The structure design enhances the reliability of the reset function, avoids the reset failure problem caused by the loosening or displacement of the connection point, further improves the stability and repeatability of the test button operation, ensures that the circuit can be turned on and cut off as expected during the multiple test button operations, improves the quality and performance consistency of the product, and reduces the troubleshooting and maintenance cost caused by the reset problem.

[0049] Specifically, the power taking sheet is electrically connected with the first wiring end 22 of the circuit breaker through the wire 21, and the movable contact is electrically connected with the second wiring end 23 of the circuit breaker.

[0050] In the embodiment, the power taking sheet is electrically connected with the first wiring terminal of the circuit breaker through the wire, and the movable contact is electrically connected with the second wiring terminal of the circuit breaker, so that the explicit electrical connection relationship between the experimental button power taking structure and the main circuit of the circuit breaker is established.

[0051] Specifically, the wire 21 is electrically connected with the first wiring terminal after winding through the magnetic ring 24.

[0052] In the embodiment, the wire is electrically connected with the first wiring terminal after winding through the magnetic ring, and the magnetic ring can effectively suppress the electromagnetic interference signals that may be generated in the wire. During the working process of the experimental button power taking and the experimental circuit, electromagnetic noise or sharp pulse interference signals may be generated due to the change of current and the action of electrical elements, which may affect the normal work of the electronic control elements or other sensitive circuits in the circuit breaker. The existence of the magnetic ring can limit these interference signals in a local range, avoid their propagation in the wire and cause adverse effects on other circuits, improve the electromagnetic compatibility of the entire circuit breaker system, ensure the stable and reliable operation of the circuit breaker in a complex electromagnetic environment, reduce the probability of malfunction or failure caused by electromagnetic interference, and improve the anti-interference ability and environmental adaptability of the product.

[0053] Specifically, the wire is further connected with a resistor 25.

[0054] In the embodiment, the connection of the resistor on the wire can play the roles of current limiting and voltage dividing. In the experimental button power taking circuit, the resistor can limit the current size to prevent damage to the experimental button, the power taking torsional spring, the power taking sheet and other components caused by too large current during power taking, and also can adjust the resistance value according to the needs to realize the voltage division of the power taking voltage, so as to meet the voltage requirements of different detection circuits or electronic elements, improve the versatility and flexibility of the power taking structure, make the experimental button power taking structure adapt to more kinds of detection circuit design and application scenarios, and the resistor as a common and low-cost electronic element, its addition will not significantly increase the product cost, but can effectively improve the performance and applicability of the product.

[0055] Skilled persons should know that although the utility model has been described according to the above specific embodiments, the utility model idea is not limited to the utility model, and any modification using the utility model idea will be included in the patent protection range.

Claims

1. A power supply structure for a test button of a circuit breaker, comprising a circuit breaker base, a tripping mechanism, and a test button, wherein the tripping mechanism comprises a contact base, a latch, and a moving contact, characterized in that: It also includes a reset elastic element, a power-taking torsion spring, and a power-taking plate. The power-taking plate is connected to the bottom shell of the circuit breaker. The power-taking torsion spring is fitted onto a post in the bottom shell of the circuit breaker. The upper end of the power-taking torsion spring has a power-taking part located above the power-taking plate, and the lower end of the power-taking torsion spring has a connecting part extending to the side of the moving contact. When the test button is pressed down, the test button can press down the power-taking part so that the power-taking part abuts against the power-taking plate to achieve electrical connection. The connecting part can only contact the moving contact to achieve electrical connection when the circuit breaker is closed.

2. The circuit breaker's test button power supply structure according to claim 1, characterized in that: It also includes a positioning mechanism for locating the connection parts.

3. The circuit breaker's test button power supply structure according to claim 2, characterized in that: The positioning mechanism includes a guide post one located below the hole post, and guide posts two and three spaced apart and obliquely below the guide post one. The connecting part of the power-taking torsion spring extends from the side of the guide post one and the groove between the guide posts two and three to the side of the moving contact.

4. The circuit breaker's test button power supply structure according to any one of claims 1-3, characterized in that: The connecting portion has a hook.

5. The circuit breaker's test button power supply structure according to claim 1, characterized in that: The experimental button has a pressing part extending from one side, and the pressing part has a fitting slot that engages with the power supply part.

6. The circuit breaker's test button power supply structure according to claim 1, characterized in that: A spring step is provided on the bottom shell of the circuit breaker below the test button. One end of the reset elastic element is connected to the spring step, and the other end is connected to the lower end of the test button.

7. The circuit breaker's test button power supply structure according to claim 6, characterized in that: The spring step has a spring hole for connecting with the reset elastic element, and the lower end of the experimental button has a spring post for connecting with the reset elastic element.

8. The circuit breaker's test button power supply structure according to claim 1, characterized in that: The power-collecting piece is electrically connected to the first terminal of the circuit breaker via a wire, and the moving contact is electrically connected to the second terminal of the circuit breaker.

9. The circuit breaker's test button power supply structure according to claim 8, characterized in that: It also includes a magnetic ring, and the wire is electrically connected to the first terminal after passing through the magnetic ring.

10. The circuit breaker's test button power supply structure according to claim 8, characterized in that: A resistor is also connected to the wire.

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