Circuit breaker
By using a stationary cover to fix the contact part in the circuit breaker, combined with a limiting part, a guide groove and a hook structure, the problem of high manufacturing cost of stationary contacts is solved, and the effects of reducing costs and improving reliability are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-24
AI Technical Summary
The high manufacturing cost of the stationary contacts in existing circuit breakers leads to an increase in the overall cost of the circuit breaker.
The stationary cover is fixedly connected to the contact part. The possibility of the stationary cover rotating in the base is reduced by the cooperation of the limiting part, partition and side plate. The flow guide groove and hook structure are set in the contact part to reduce the material used of the stationary contact. Combined with the reinforcing plate, the strength of the stationary cover and the current diversion effect of the flow guide groove are improved.
It reduces the manufacturing cost of stationary contacts, improves the reliability and breaking effect of circuit breakers, reduces arc erosion of stationary contacts, extends the service life of stationary contacts, and improves the efficiency and reliability of circuit breakers.
Smart Images
Figure CN224036310U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical equipment technology, and more particularly to a circuit breaker. Background Technology
[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. A circuit breaker includes a base, within which moving contacts and stationary contacts are housed.
[0003] A stationary contact typically includes a fixing part and a contact part. The fixing part is used to fix the stationary contact to a base, and the contact part can contact or separate from the moving contact to control the circuit breaker's conduction or disconnection. In the prior art, the manufacturing cost of stationary contacts is relatively high, which leads to excessively high manufacturing costs for circuit breakers. Utility Model Content
[0004] This application provides a circuit breaker to reduce the manufacturing cost of the circuit breaker.
[0005] In a first aspect, this application provides a circuit breaker, comprising: a base, a stationary contact, and a stationary cover. The base has an internal receiving cavity and includes a side plate. A partition is provided within the receiving cavity, and the partition and side plate are disposed opposite each other with a gap between them. The stationary contact is disposed within the gap and includes a fixed portion and a contact portion connected to each other. The fixed portion is fixed within the base. The stationary cover covers the contact portion and is fixedly connected to it. A limiting portion is provided on the side of the stationary cover away from the fixed portion, one end of which abuts against the partition, and the other end of which abuts against the side plate.
[0006] With the above solution, the stationary cover is fixedly connected to the contact part, which reduces the possibility of displacement of the stationary cover on the contact part. This displacement can include translation or rotation. Since the partition and the side plate are arranged opposite each other, when one end of the limiting part abuts against the partition and the other end of the limiting part abuts against the side plate of the base, the possibility of the stationary cover rotating within the base can be reduced.
[0007] With the stationary cover and contact portion fixedly connected, the possibility of the contact portion rotating within the base can be reduced. This decreases the likelihood of the stationary and moving contacts failing to make contact due to the contact portion deviating from its intended installation position. Compared to existing technologies, there is no need to provide an additional protruding structure on the stationary contact, thus reducing its volume. Since the material cost for manufacturing the stationary cover is relatively low compared to the material cost for manufacturing the stationary contact, reducing the volume of the stationary contact and adding a limiting part to the stationary cover can reduce the manufacturing cost of the stationary contact, thereby reducing the manufacturing cost of the circuit breaker.
[0008] In one possible design, the contact portion is provided with a guide groove that extends through the contact portion.
[0009] Through the above scheme, the design of the current guide groove prevents the current from flowing in a straight line through the contact area. Instead, it detours around the guide groove before reaching the stationary contact, thus redirecting the current at the contact area and providing an electro-repulsive force through current reversal. When the electro-repulsive force within the circuit breaker increases, the circuit breaker's breaking capacity is improved, thereby increasing its reliability. Furthermore, the design of the current guide groove reduces the material used in the stationary contact, saving on its manufacturing cost and consequently reducing the overall manufacturing cost of the circuit breaker.
[0010] In one possible design, the stationary cover is provided with a hook, which includes a hook handle and a hook bend. The channel wall of the flow guide is provided with a limiting groove, the hook handle is located in the limiting groove, and the hook bend passes through the flow guide and hooks with the side of the contact portion facing away from the stationary cover.
[0011] Through the above scheme, the hook design allows the stationary cover to be fixed to the stationary contact. When the hook shank is located within the guide groove, it can also be located within the limiting groove, thus limiting the stationary cover along the length of the stationary contact. When the hook passes through the guide groove, the guide groove and the hook cooperate to limit the stationary cover along the width of the stationary contact. When the hook bend passes through the guide groove and hooks with the side of the contact portion facing away from the stationary cover, it limits the stationary cover along the thickness of the stationary contact. Furthermore, the limiting groove within the guide groove reduces the material used in the stationary contact, thus saving on manufacturing costs and consequently reducing the manufacturing cost of the circuit breaker.
[0012] In one possible design, the contact portion has a slot on the side facing the stationary cover. The stationary cover has a locking block on the side facing the contact portion. The locking block engages with the slot.
[0013] The above solution allows the locking block and slot to work together to fix the stationary cover to the stationary contact. Furthermore, the slot on the contact portion reduces the material used in the stationary contact, thus saving on manufacturing costs and consequently reducing the overall manufacturing cost of the circuit breaker.
[0014] In one possible design, the static enclosure includes a reinforcing plate facing the contact portion. The reinforcing plate contacts the sidewall of the contact portion.
[0015] The above solution increases the strength of the stationary cover by adding a reinforcing plate, reducing the likelihood of breakage during stationary contact installation. When the reinforcing plate contacts the sidewall of the contact portion, the sidewall also helps to limit the stationary cover's movement, further reducing the possibility of displacement on the stationary contact.
[0016] In one possible design, the stationary contact also includes a contact seat on which a stationary contact point is provided.
[0017] The above solution provides a mounting base for the stationary contact. Furthermore, the contact base guides the installation of the stationary contact, making its installation easier and reducing time costs.
[0018] In one possible design, the contact seat has an arc-inducing section that extends toward the fixing part.
[0019] With the above scheme, the arc-initiating section extends towards the fixed part, allowing the arc to transfer from the stationary contact to the arc-initiating section during circuit breaker breaking. This reduces the time the arc spends eroding the stationary contact. Reduced erosion time decreases contact wear, eliminating the need for frequent replacements and lowering stationary contact operating costs. This, in turn, reduces the overall operating cost of the circuit breaker. Furthermore, the transfer of the arc from the stationary contact to the arc-initiating section increases the arc-extinguishing speed, thus improving the circuit breaker's efficiency.
[0020] In one possible design, the circuit breaker also includes a moving contact that is rotatably connected to the base.
[0021] With the above scheme, the moving contact can come into contact with or separate from the stationary contact during rotation. This allows the contact portion to come into contact with or separate from the moving contact, thereby controlling the circuit breaker's on / off state.
[0022] In one possible design, a collecting plate is provided on the side of the limiting part away from the contact part.
[0023] The above solution allows the collection plate to collect metal particles generated during the circuit breaker's tripping process, thereby reducing the damage these particles can cause to the internal components of the circuit breaker and improving its reliability.
[0024] In one possible design, the collecting plate bends toward the moving contact relative to the limiting portion.
[0025] By bending the collecting plate towards the moving contact, an angle is formed between the collecting plate and the limiting part. When metal particles are collected by the collecting plate, they can fall between the collecting plate and the limiting part. This increases the collecting efficiency of the collecting plate and reduces the probability of reduced collecting efficiency due to poor adhesion of metal particles. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of the base provided in an embodiment of this application.
[0027] Figure 2 This is a schematic diagram of the structure of the stationary contact provided in an embodiment of this application.
[0028] Figure 3 This is an assembly diagram of the stationary contact and stationary cover provided in an embodiment of this application.
[0029] Figure 4 This is a schematic diagram of the static cover provided in an embodiment of this application.
[0030] Figure 5 This is a partial structural cross-sectional view of the circuit breaker provided in an embodiment of this application.
[0031] Figure 6 for Figure 5 An enlarged view of section A.
[0032] Explanation of reference numerals in the attached figures:
[0033] 100. Base; 110. Side panel; 120. Partition;
[0034] 200. Stationary contact; 210. Fixing part; 220. Contact part; 221. Flow guide groove; 222. Limiting groove; 230. Contact seat; 231. Arc-inducing segment;
[0035] 300. Static cover; 310. Limiting part; 320. Reinforcing plate; 330. Hook handle part; 340. Hook bend part; 350. Collection plate;
[0036] 400. Moving contact. Detailed Implementation
[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
[0039] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.
[0040] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0041] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.
[0042] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0043] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.
[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0045] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. A circuit breaker includes a base, within which moving contacts and stationary contacts are housed.
[0046] A stationary contact typically consists of a fixed part and a contact part. When the stationary contact is installed in the base, it is usually fixed to the base by bolts passing through mounting holes provided in the fixed part. During the installation of the stationary contact, the rotation of the bolts may cause the relative position of the stationary contact and the base to rotate. This may cause the contact part to deviate from its original installation position, potentially leading to a problem where the stationary contact and the moving contact cannot make contact.
[0047] In existing technologies, a rectangular groove is typically provided on the base, and a rectangular protrusion is provided on the fixing part. The problem of rotation between the stationary contact and the base is solved by the cooperation of the protrusion and the groove. Alternatively, existing technologies may also provide a protruding structure on the contact part, which abuts against the side plate of the base to solve the problem of rotation between the stationary contact and the base.
[0048] However, the above two solutions increase the manufacturing cost of the stationary contact, which in turn increases the manufacturing cost of the circuit breaker. To reduce the manufacturing cost of the circuit breaker, this application provides a circuit breaker.
[0049] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
[0050] Figure 1 This is a schematic diagram of the structure of the base provided in an embodiment of this application. Figure 1 As shown, this application provides a circuit breaker, which includes: a base 100, a receiving cavity inside the base 100, a side plate 110, a partition 120 inside the receiving cavity, the partition 120 and the side plate 110 being disposed opposite to each other, and a gap being between the partition 120 and the side plate 110.
[0051] The circuit breaker includes a housing, which includes a middle cover and a base 100. The base 100 has an internal mounting space, which is a receiving cavity. The internal components of the circuit breaker can be installed within the receiving cavity. The middle cover can be placed on the base 100 to protect the internal components of the circuit breaker.
[0052] A partition 120 and an arc-damping plate can be provided inside the receiving cavity. The partition 120 can be parallel to the side plate 110 of the base 100, and there can be a gap between the partition 120 and the side plate 110 of the base 100. The arc-damping plate can be disposed between the partition 120 and the side plate 110, and one side of the arc-damping plate can be fixedly connected to the partition 120, and the other side of the arc-damping plate can be fixedly connected to the side plate 110. In this way, the partition 120, the arc-damping plate, and the side plate 110 can enclose a small installation space within the receiving cavity of the base 100.
[0053] Figure 2 This is a schematic diagram of the structure of the stationary contact provided in an embodiment of this application. Figure 1 as well as Figure 2 As shown, the stationary contact 200 is disposed in the gap. The stationary contact 200 includes a fixing part 210 and a contact part 220 that are connected to each other. The fixing part 210 is fixed in the base 100.
[0054] The stationary contact 200 can be located within a small installation space enclosed by the partition 120, the arc-blocking plate, and the side plate 110. When the stationary contact 200 is installed in the base 100, the stationary contact 200 does not need to contact the partition 120 or the side plate 110.
[0055] The stationary contact 200 can be made of a highly conductive material such as copper or silver. The stationary contact 200 includes two interconnected parts. One part is a fixing part 210, which can fix the stationary contact 200 inside the base 100. The other part is a contact part 220, on which a contact seat 230 may be provided.
[0056] The contact base 230 can be a raised or recessed structure, or it can be a region on the contact portion 220. A stationary contact can be set on the contact base 230. The contact base 230 provides a mounting base for the stationary contact. Furthermore, the contact base 230 guides the installation of the stationary contact, making its installation easier and reducing the time cost during installation.
[0057] Figure 3 This is an assembly diagram of the stationary contact and stationary cover provided in an embodiment of this application. Figure 1 as well as Figure 3 As shown, the static cover 300 is provided on the contact portion 220 and is fixedly connected to the contact portion 220. The static cover 300 has a limiting portion 310 on the side away from the fixing portion 210. One end of the limiting portion 310 abuts against the partition plate 120, and the other end of the limiting portion 310 abuts against the side plate 110.
[0058] The stationary cover 300 can be made of insulating material. The stationary cover 300 can cover the contact portion 220 except for the contact seat 230. When the stationary cover 300 is covered on the contact portion 220, the stationary cover 300 can be fixedly connected to the contact portion 220, so that the relative position of the stationary cover 300 and the contact portion 220 will not change.
[0059] By setting up a static cover 300, the static cover 300 can provide insulation protection for the remaining parts of the contact portion 220 except for the contact seat 230. In this way, during the circuit breaker breaking process, the electric arc will not transfer from the contact seat 230 to other parts of the contact portion 220, which can improve the reliability of the circuit breaker.
[0060] The limiting part 310 can be a plate-like structure provided at the end of the stationary cover 300 away from the fixing part 210. The limiting part 310 can be made of the same material as the stationary cover 300. The limiting part 310 can be integrally formed with the stationary cover 300, or the limiting part 310 can be provided on the stationary cover 300 by snap-fit or adhesive after the stationary cover 300 is formed.
[0061] In summary, the fixed connection between the stationary cover 300 and the contact portion 220 reduces the possibility of displacement of the stationary cover 300 on the contact portion 220. This displacement may include translation or rotation. Since the partition 120 and the side plate 110 are arranged opposite to each other, when one end of the limiting portion 310 abuts against the partition 120 and the other end of the limiting portion 310 abuts against the side plate 110 of the base 100, the possibility of the stationary cover 300 rotating within the base 100 can be reduced.
[0062] With the stationary cover 300 and the contact portion 220 fixedly connected, the possibility of the contact portion 220 rotating within the base 100 can be reduced. This reduces the likelihood of the stationary contact 200 and the moving contact 400 failing to make contact due to the contact portion 220 deviating from its intended installation position. Compared to existing technologies, there is no need to provide an additional protruding structure on the stationary contact 200, thus reducing its volume. Since the material cost of manufacturing the stationary cover 300 is relatively low compared to the material cost of manufacturing the stationary contact 200, reducing the volume of the stationary contact 200 and adding a limiting portion 310 to the stationary cover 300 can reduce the manufacturing cost of the stationary contact 200, thereby reducing the manufacturing cost of the circuit breaker.
[0063] Please continue to refer to Figure 2 As shown, the contact portion 220 is provided with a guide groove 221, which penetrates the contact portion 220.
[0064] The flow guide groove 221 can be a groove structure provided on the contact portion 220, and the flow guide groove 221 can penetrate the contact portion 220 along the thickness direction of the contact portion 220. The flow guide groove 221 can be a U-shaped groove, and when the flow guide groove 221 is provided on the contact portion 220, it can be provided around the stationary contact point.
[0065] In summary, the design of the current guide groove 221 prevents the current from flowing in a straight line through the contact portion 220. Instead, it detours around the guide groove 221 before reaching the stationary contact, thus redirecting the current at the contact portion 220 and providing an electro-repulsive force through current reversal. Increased electro-repulsive force within the circuit breaker improves its breaking capacity, thereby increasing its reliability. Furthermore, the guide groove 221 reduces the material required for the stationary contact 200, saving on its manufacturing cost and consequently reducing the overall manufacturing cost of the circuit breaker.
[0066] There are several ways to connect the stationary cover 300 and the stationary contact 200. Two of them will be explained in detail below with reference to the attached drawings.
[0067] Figure 4 This is a schematic diagram of the structure of the static shield provided in an embodiment of this application. The first connection method is as follows: Figures 2 to 4 As shown, the static cover 300 is provided with a hook, which includes a hook handle portion 330 and a hook bend portion 340. The channel wall of the flow guide 221 is provided with a limiting groove 222, the hook handle portion 330 is located in the limiting groove 222, and the hook bend portion 340 passes through the flow guide 221 and hooks with the side of the contact portion 220 facing away from the static cover 300.
[0068] The hook can be a hook-shaped structure, and can be made of the same material as the stationary cover 300. The hook includes a hook shank 330 and a hook bend 340. The hook shank 330 can be located within the guide groove 221, and the hook bend 340 can hook with the side plate 110 on the side of the contact portion 220 away from the stationary cover 300. There can be multiple hooks, and when there are multiple hooks, they can be arranged substantially symmetrically on the stationary cover 300.
[0069] The stationary contact 200 can be a long strip-shaped structure, and can include a length direction, a thickness direction, and a width direction. The length direction of the stationary contact 200 can be the arrangement direction of the fixing part 210 and the contact part 220. The thickness direction of the stationary contact 200 can be the arrangement direction of the stationary cover 300 and the contact part 220. The width direction of the stationary contact 200 can be perpendicular to both the length direction and the thickness direction of the stationary contact 200.
[0070] The number of limiting grooves 222 can be the same as the number of hooks. The limiting grooves 222 can be grooves formed on the wall of the guide groove 221 along the width direction of the stationary contact 200.
[0071] When the first connection method is selected, the hook allows the stationary cover 300 to be fixed to the stationary contact 200. When the hook shank 330 is located within the guide groove 221, the hook shank 330 can also be located within the limiting groove 222, thus limiting the stationary cover 300 along the length of the stationary contact 200. When the hook passes through the guide groove 221, the guide groove 221 and the hook engage to limit the stationary cover 300 along the width of the stationary contact 200. When the hook bend 340 passes through the guide groove 221 and hooks with the side of the contact portion 220 facing away from the stationary cover 300, the stationary cover 300 is limited along the thickness of the stationary contact 200. Furthermore, by providing the limiting groove 222 within the guide groove 221, the material used in the stationary contact 200 can be reduced, thus saving on the manufacturing cost of the stationary contact 200 and consequently reducing the manufacturing cost of the circuit breaker.
[0072] Please refer to the second connection method. Figures 2 to 4 As shown, the contact portion 220 has a slot on the side facing the stationary cover 300. The stationary cover 300 has a locking block on the side facing the contact portion 220. The locking block engages with the slot.
[0073] The slot can be a blind slot structure with the contact portion 220 facing the stationary cover 300, and the slot opening can face the stationary cover 300. The slot can be integrally formed with the contact portion 220.
[0074] The retaining block can be a protruding structure provided on the stationary cover 300 in the direction of the contact portion 220. The retaining block can be made of the same material as the stationary cover 300. The retaining block can be integrally formed with the stationary cover 300, or the retaining block can be set on the stationary cover 300 by means of adhesion or other methods after the stationary cover 300 is formed.
[0075] When the card block is located in the card slot, the card block can be interference-fitted with the card slot, or the card block can be adhered to the wall of the card slot.
[0076] When the second connection method is selected, the locking block and the locking slot can fix the stationary cover 300 onto the stationary contact 200. Furthermore, the locking slot on the contact portion 220 can reduce the material used in the stationary contact 200, thus saving manufacturing costs and reducing the manufacturing cost of the circuit breaker.
[0077] Because the stationary cover 300 is fixedly connected to the stationary contact 200, one end of the limiting part 310 abuts against the partition plate 120, and the other end of the limiting part 310 abuts against the side plate 110. This prevents the stationary contact 200 from easily rotating during installation. However, the stationary contact 200 is fixed to the base 100 by the fixing part 210. The limiting part 310 is far from the fixing part 210, which results in a large torque on the stationary cover 300, which may cause the stationary cover 300 to break.
[0078] To reduce the probability of the aforementioned problems occurring, this application also makes improvements to the static shield 300, such as... Figure 3 as well as Figure 4 As shown, the static cover 300 includes a reinforcing plate 320, which is disposed toward the contact portion 220. The reinforcing plate 320 is in contact with the sidewall of the contact portion 220.
[0079] The reinforcing plate 320 can be a plate-shaped structure disposed on the stationary cover 300 in the direction toward the contact portion 220. There can be two reinforcing plates 320, which can be symmetrically disposed on the stationary cover 300. The reinforcing plates 320 can be disposed close to the fixing portion 210. The reinforcing plates 320 can be integrally formed with the stationary cover 300.
[0080] When the static cover 300 is placed over the contact portion 220, the static cover 300 and the reinforcing plate 320 can cooperate to wrap the side wall of the contact portion 220.
[0081] In summary, the reinforcement plate 320 increases the strength of the stationary cover 300, reducing the likelihood of breakage during the installation of the stationary contact 200. When the reinforcement plate 320 contacts the side wall of the contact portion 220, the side wall of the contact portion 220 can also limit the stationary cover 300, reducing the possibility of displacement of the stationary cover 300 on the stationary contact 200.
[0082] Figure 5 This is a partial structural cross-sectional view of the circuit breaker provided in an embodiment of this application. (See attached image.) Figure 2 as well as Figure 5 As shown, the circuit breaker also includes a moving contact 400, which is rotatably connected to the base 100. The present application also provides an arc-leading segment 231 on the contact seat 230, which can extend toward the fixing part 210.
[0083] The moving contact 400 is located on one side of the stationary contact 200. The moving contact 400 includes a first end and a second end positioned opposite each other. The first end has a moving contact on the side facing the stationary contact 200. A contact support is provided within the base 100, and the contact support is rotatably connected to the base 100. The second end passes through an arc-damping plate and is fixedly connected to the contact support. During rotation, the contact support can drive the moving contact 400 to rotate together, allowing the moving contact 400 to contact or separate from the stationary contact. This allows the contact portion 220 to contact or separate from the moving contact 400 to control the circuit breaker's on / off state.
[0084] The base 100 also has an arc-extinguishing chamber inside, which can be disposed on the contact part 220. Both the moving contact and the stationary contact can be disposed in the arc-extinguishing chamber. The opening direction of the arc-extinguishing chamber can be opposite to the fixing part 210. When the moving contact and the stationary contact separate, an electric arc will be generated between the moving contact and the stationary contact, and the generated electric arc can enter the arc-extinguishing chamber for extinguishing.
[0085] The arc-initiating segment 231 extends toward the fixed part 210, which is actually also toward the interior of the arc-extinguishing chamber. When the arc-initiating segment 231 extends toward the interior of the arc-extinguishing chamber, the electric arc will transfer from the stationary contact to the arc-initiating segment 231.
[0086] The arc-initiating section 231 can be bent toward the moving contact 400 relative to the contact seat 230. In this way, the arc-initiating section 231 can better guide the electric arc, thereby allowing the electric arc to enter the arc-extinguishing chamber more quickly.
[0087] With the above configuration, the arc-initiating section 231 extends towards the fixed part 210. During the circuit breaker's breaking process, the arc can be transferred from the stationary contact to the arc-initiating section 231. This reduces the time the arc erodes the stationary contact. When the arc's erosion time on the stationary contact is reduced, the wear on the stationary contact can be reduced, eliminating the need for frequent replacements and thus lowering the operating cost of the stationary contact 200. This, in turn, reduces the operating cost of the circuit breaker. Furthermore, when the arc transfers from the stationary contact to the arc-initiating section 231, the arc-extinguishing speed of the circuit breaker can be increased, thereby improving the circuit breaker's efficiency.
[0088] Figure 6 for Figure 5 An enlarged view of section A. (See image.) Figure 2 , Figure 5 as well as Figure 6 As shown, a collection plate 350 is provided on the side of the limiting part 310 away from the contact part 220.
[0089] The collecting plate 350 can be a plate-like structure installed on the stationary cover 300. The collecting plate 350 can be integrally formed with the stationary cover 300, or the collecting plate 350 can be installed on the stationary cover 300 after it has been formed by means of snap-fit or adhesion. The collecting plate 350 can abut against the arc-blocking plate, or there can be a gap between the collecting plate 350 and the arc-blocking plate.
[0090] by Figure 5 Taking the placement of the base 100 as an example, in the prior art, circuit breakers usually need to be rotated 90° clockwise before use. At this time, the stationary contact is located above the collection plate 350. When the circuit breaker breaks, the moving contact separates from the stationary contact and generates an electric arc. The electric arc will burn the moving contact and the stationary contact, and the electric arc will also generate high-temperature gas inside the base 100.
[0091] During the arc erosion of the moving and stationary contacts, metal particles are generated at both points. These metal particles are blown upwards or downwards by high-temperature gas. When the high-temperature gas blows downwards, it creates vortices near the collecting plate 350 and the arc-blocking plate. These vortices can blow the metal particles onto the collecting plate 350, causing them to adhere to it.
[0092] In summary, the collection plate 350 can collect the metal particles generated during the circuit breaker's breaking process, thereby reducing the damage caused by these metal particles to the internal components of the circuit breaker and improving the reliability of the circuit breaker.
[0093] Please continue to refer to Figure 5 as well as Figure 6 As shown, the collecting plate 350 is bent toward the moving contact 400 relative to the limiting part 310.
[0094] The bending angle of the collecting plate 350 can be the angle between the collecting plate 350 and the limiting part 310. The bending angle of the collecting plate 350 can be 10°, 35°, 90° or 120°, etc. This application does not limit the bending angle of the collecting plate 350, and it can be selected according to the needs in actual use.
[0095] With the above configuration, the collecting plate 350 bends towards the moving contact 400, creating an angle between the collecting plate 350 and the limiting part 310. When metal particles are collected by the collecting plate 350, they can fall between the collecting plate 350 and the limiting part 310. This increases the collecting efficiency of the collecting plate 350 and reduces the probability of reduced collecting efficiency due to poor adhesion of metal particles.
Claims
1. A circuit breaker, characterized in that, include: The base has an internal cavity. The base includes a side plate. A partition is provided inside the cavity. The partition is disposed opposite to the side plate, and there is a gap between the partition and the side plate. A stationary contact is disposed within the gap. The stationary contact includes a fixed part and a contact part that are connected to each other. The fixed part is fixed inside the base. A static cover is provided on the contact portion and fixedly connected to the contact portion. A limiting portion is provided on the side of the static cover away from the fixed portion. One end of the limiting portion abuts against the partition plate, and the other end of the limiting portion abuts against the side plate.
2. The circuit breaker according to claim 1, characterized in that, The contact portion is provided with a flow guide groove, which extends through the contact portion.
3. The circuit breaker according to claim 2, characterized in that, The static cover is provided with a hook, which includes a hook shank and a hook bend. The guide channel wall is provided with a limiting groove, the hook handle is located in the limiting groove, and the hook bend passes through the guide channel and hooks with the side of the contact part facing away from the static cover.
4. The circuit breaker according to claim 1, characterized in that, The contact portion is provided with a slot on the side facing the static cover; The static cover has a locking block on the side facing the contact portion; The card block engages with the card slot.
5. The circuit breaker according to claim 1, characterized in that, The static cover includes a reinforcing plate, which is disposed toward the contact portion; The reinforcing plate is in contact with the sidewall of the contact portion.
6. The circuit breaker according to claim 1, characterized in that, The stationary contact also includes a contact seat, on which a stationary contact point is provided.
7. The circuit breaker according to claim 6, characterized in that, The contact seat is provided with an arc-guiding section, which extends toward the fixing part.
8. The circuit breaker according to any one of claims 1-7, characterized in that, It also includes a moving contact, which is rotatably connected to the base.
9. The circuit breaker according to claim 8, characterized in that, A collecting plate is provided on the side of the limiting part away from the contact part.
10. The circuit breaker according to claim 9, characterized in that, The collecting plate bends toward the moving contact relative to the limiting portion.