Arc extinguishing chamber and circuit breaker

Abstract

The utility model belongs to low -voltage electric appliance technical field, specifically disclose a kind of arc-extinguishing chamber and circuit breaker. The utility model provides arc-extinguishing chamber, two arc separation board and arc extinguishing baffle opposite two side connection, each arc separation board is respectively connected with reflection part, along the first crease bending arc separation board, along the second crease bending reflection part, make reflection part, arc separation board and arc extinguishing baffle surround and form arc-extinguishing chamber, simplify assembly procedure, it is not easy to appear assembly deviation, and the connection between reflection part, arc separation board and arc extinguishing baffle does not exist gap, improve the reliability of reflection and arc separation;The magnetism angle of arc-extinguishing grid piece is placed in the isolation groove of reflection part, the setting of isolation groove can avoid arc produced when circuit breaker breaks and burn magnetism angle, ensure that magnetism angle can improve the breaking capacity of circuit breaker, to shorten the breaking time of circuit breaker.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to an arc-extinguishing chamber and a circuit breaker. Background Technology

[0002] As a key protective component in low-voltage power distribution systems, one of the core functions of circuit breakers is to quickly cut off fault current when faults such as short circuits and overloads occur in the circuit, and to extinguish the electric arc rapidly through the arc-extinguishing chamber, so as to avoid damage to the internal components of the circuit breaker caused by the high temperature of the electric arc, and to ensure the safe and stable operation of the power distribution system.

[0003] The arc-extinguishing chamber of existing circuit breakers consists of a shell and arc-extinguishing grid plates. The shell is typically assembled from three independent parts: a reflector plate, an arc-isolating plate, and an arc-extinguishing baffle plate, forming the arc-extinguishing cavity. This process involves numerous parts, each requiring individual design and fabrication, increasing production costs and management complexity. The three independent parts are assembled onto the arc-extinguishing chamber frame using snap-fit, screw, and riveting methods, a cumbersome assembly process prone to errors that affect arc-extinguishing performance. Gaps exist between the independent parts; the high temperature of the electric arc can cause slight deformation, widening these gaps and reducing the reliability of reflection and arc isolation. The arc-extinguishing grid plates are located within the arc-extinguishing cavity. When the moving and stationary contacts break, an arc is generated. The high-temperature gas and metal vapor produced by the arc are reflected back into the arc-extinguishing cavity by the reflector plate. This reflected gas and metal vapor can erode the magnetizing angle of the arc-extinguishing grid plates, reducing the efficiency of arc transfer and the speed of arc extinguishing. Utility Model Content

[0004] The purpose of this invention is to provide an arc-extinguishing chamber and a circuit breaker, which reduces the number of parts, simplifies the assembly steps, improves the reliability of arc-extinguishing chamber reflection and arc isolation, reduces the degree of arc erosion of the magnetizing angle of the arc-extinguishing grid, and ensures that the magnetizing angle can improve the breaking capacity of the circuit breaker.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Firstly, an arc-extinguishing chamber is provided, comprising:

[0007] An arc-extinguishing chamber plate includes an arc-extinguishing baffle, two arc-blocking plates, and two reflective parts. The arc-extinguishing baffle is connected to the arc-blocking plates on opposite sides, and a first crease is formed at the connection point. The arc-blocking plates are bent along the first crease. Each arc-blocking plate is connected to a reflective part, and a second crease is formed at the connection point. The second crease is parallel to the first crease. The two reflective parts are bent along the second crease, and the two reflective parts are spaced apart. The reflective parts, the arc-blocking plates, and the arc-extinguishing baffle form an arc-extinguishing chamber.

[0008] An arc-extinguishing grid is provided with magnetizing angles on both sides of the arc-extinguishing grid. The reflective part has an isolation groove. The arc-extinguishing grid is disposed in the arc-extinguishing cavity, and the magnetizing angles are placed in the isolation groove.

[0009] As an optional technical solution for the aforementioned arc-extinguishing chamber, the reflective part includes a first reflective plate and a second reflective plate. The first reflective plate is connected to the arc-blocking plate and a second crease is formed at the connection. The first reflective plate is bent along the second crease and is disposed opposite to the arc-extinguishing baffle. The second reflective plate is connected to the first reflective plate and a third crease is formed at the connection. The third crease is parallel to the second crease. The second reflective plate is bent towards the arc-extinguishing chamber along the third crease. The second reflective plate, the first reflective plate, and the arc-blocking plate surround and form the isolation groove.

[0010] As an optional technical solution for the arc-extinguishing chamber mentioned above, an arc-containing groove is recessed on one side edge of the arc-extinguishing grid plate, and the magnetizing angles are respectively provided at the ends of the opposite side walls of the arc-containing groove. Two fixing grooves are provided at intervals at the bottom of the arc-containing groove, and the end of the second reflector away from the third crease is inserted into the fixing groove.

[0011] As an optional technical solution for the aforementioned arc-extinguishing chamber, the distance between the two second reflectors gradually increases from the end where the second reflector is connected to the first reflector to the other end.

[0012] As an optional technical solution for the aforementioned arc-extinguishing chamber, each of the arc-blocking plates is provided with a first slot, and the arc-extinguishing grid plates are provided with first pins on opposite sides, with the first pins inserted into the first slots on the corresponding sides.

[0013] And / or, the arc-suppressing baffle is provided with an exhaust channel.

[0014] As an optional technical solution for the aforementioned arc-extinguishing chamber, an upper baffle is provided between the two arc-blocking plates. One end of the upper baffle is connected to the side of the arc-extinguishing baffle and a fourth crease is formed at the connection. Two first insert plates are provided at intervals at the other end of the upper baffle. The upper baffle is bent along the fourth crease and placed on the top of the arc-extinguishing chamber. The first insert plates are inserted into the isolation groove. An exhaust hole is provided on the upper baffle.

[0015] As an optional technical solution for the arc-extinguishing chamber mentioned above, the upper baffle is provided with second pins on opposite sides, and the two arc-blocking plates are respectively provided with second slots, with the second pins inserted into the corresponding second slots;

[0016] And / or, the first insert plate is provided with a third pin at one end away from the upper baffle, the wall of the isolation groove is provided with a third slot, and the third pin is inserted into the third slot.

[0017] As an optional technical solution for the aforementioned arc-extinguishing chamber, each of the arc-blocking plates has a folding foot at its top edge. The folding foot can be bent and placed against the upper baffle on one side of the outside of the arc-extinguishing chamber.

[0018] As an optional technical solution for the arc-extinguishing chamber described above, a third insert plate is provided between the two first insert plates. One end of the third insert plate is connected to the other end of the upper baffle, and the other end of the third insert plate is bent and placed between the two reflective parts. The side of the third insert plate abuts against the reflective part.

[0019] As an alternative technical solution for the aforementioned arc-extinguishing chamber, the end of the first insert plate facing away from the upper baffle is bent and the bent portion abuts against the wall of the isolation groove.

[0020] As an optional technical solution for the arc-extinguishing chamber mentioned above, a lower baffle is provided between the two arc-blocking plates. One end of the lower baffle is connected to the side of the arc-extinguishing baffle and a fifth crease is formed at the connection. The lower baffle is bent along the fifth crease and placed at the bottom of the arc-extinguishing chamber. The lower baffle is provided with a receiving hole for the stationary contact of the stationary contact to pass through and be placed in the arc-extinguishing chamber.

[0021] As an optional technical solution for the aforementioned arc-extinguishing chamber, the lower baffle is provided with a fourth pin on each side, and the two arc-blocking plates are respectively provided with a fourth slot, and the fourth pin is inserted into the corresponding fourth slot;

[0022] And / or, the lower baffle is provided with a fifth pin at the end opposite to the arc-extinguishing baffle, and the reflective part is provided with a fifth slot, the fifth pin being inserted into the fifth slot.

[0023] As an optional technical solution for the aforementioned arc-extinguishing chamber, a fourth insert plate is provided at one end of the lower baffle away from the arc-extinguishing baffle. One end of the fourth insert plate is connected to the lower baffle, and the other end of the fourth insert plate is bent and placed between the two reflective parts. The side of the fourth insert plate abuts against the reflective parts.

[0024] As an optional technical solution for the aforementioned arc-extinguishing chamber, the lower baffle is provided with two fifth insert plates at intervals at one end away from the arc-extinguishing baffle. One end of the fifth insert plate is connected to the lower baffle, and the other end of the fifth insert plate is bent and inserted into the isolation groove. The bent part of the fifth insert plate abuts against the groove wall of the isolation groove.

[0025] Secondly, a circuit breaker is provided, including a housing and the aforementioned arc-extinguishing chamber, wherein the arc-extinguishing chamber is disposed within the housing.

[0026] Beneficial effects:

[0027] The arc-extinguishing chamber provided by this utility model has two arc-isolating plates connected to the opposite sides of the arc-extinguishing baffle. Each arc-isolating plate is connected to a reflective part. The arc-isolating plate is bent along the first crease and the reflective part is bent along the second crease, so that the reflective part, the arc-isolating plate and the arc-extinguishing baffle surround the arc-extinguishing chamber. This simplifies the assembly steps, reduces the likelihood of assembly deviations, and eliminates gaps between the reflective part, the arc-isolating plate and the arc-extinguishing baffle, thus improving the reliability of reflection and arc isolation. The magnetizing angle of the arc-extinguishing grid is placed in the isolation groove of the reflective part. The isolation groove can prevent the arc generated during circuit breaker breaking from burning the magnetizing angle, ensuring that the magnetizing angle can improve the breaking capacity of the circuit breaker and shorten the breaking time of the circuit breaker. Attached Figure Description

[0028] Figure 1 This is an axonometric view of the first structure of the arc-extinguishing chamber provided in this embodiment of the present invention;

[0029] Figure 2 This is an unfolded view of the arc-extinguishing chamber plate of the first type of arc-extinguishing chamber provided in this embodiment of the present utility model;

[0030] Figure 3 This is a top axonometric view of the first structure of the arc-extinguishing chamber provided in this embodiment of the present invention;

[0031] Figure 4 This is a top plan view of the first structure of the arc-extinguishing chamber provided in this embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the arc-extinguishing grid sheet provided in an embodiment of the present invention;

[0033] Figure 6 This is an unfolded view of the second structure of the arc-extinguishing chamber plate provided in this embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of an arc-extinguishing chamber with a second type of arc-extinguishing chamber plate provided in an embodiment of the present invention;

[0035] Figure 8 This is a development diagram of the third structure of the arc-extinguishing chamber plate provided in this embodiment of the utility model;

[0036] Figure 9 This is a schematic diagram of the structure of an arc-extinguishing chamber with a third type of arc-extinguishing chamber plate provided in an embodiment of the present invention;

[0037] Figure 10 This is a development diagram of the fourth structure of the arc-extinguishing chamber plate provided in this embodiment of the utility model;

[0038] Figure 11 This is a schematic diagram of the structure of an arc-extinguishing chamber with a fourth type of arc-extinguishing chamber plate provided in this embodiment of the present invention;

[0039] Figure 12 This is an unfolded view of the fifth structure of the arc-extinguishing chamber plate provided in this embodiment of the utility model;

[0040] Figure 13 This is a schematic diagram of the structure of an arc-extinguishing chamber with a fifth type of arc-extinguishing chamber plate provided in this embodiment of the present invention;

[0041] Figure 14 This is a bottom view of the first structure of the arc-extinguishing chamber provided in this embodiment of the utility model.

[0042] In the picture:

[0043] 1. Arc-extinguishing chamber plate; 2. Arc-extinguishing grid plate;

[0044] 11. Arc-suppressing baffle; 111. Exhaust channel; 12. Arc-blocking plate; 121. First slot; 122. Second slot; 123. Folding foot; 124. Fourth slot; 13. Reflector; 131. Isolation groove; 132. First reflector; 133. Second reflector; 134. Third crease; 135. Third slot; 136. Fifth slot; 14. First crease; 15. Second crease; 16. Upper baffle; 161. First insert plate; 162. Exhaust hole; 163. Second pin; 164. Third pin; 165. Third insert plate; 17. Fourth crease; 18. Lower baffle; 181. Receiving hole; 182. Fourth pin; 183. Fifth pin; 184. Fourth insert plate; 185. Fifth insert plate; 19. Fifth crease;

[0045] 21. Magnetizing angle; 22. Arc receiving groove; 23. Fixing groove; 24. First pin. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] like Figures 1 to 4 As shown, this embodiment provides an arc-extinguishing chamber, which includes an arc-extinguishing chamber plate 1 and an arc-extinguishing grid plate 2. The arc-extinguishing chamber plate 1 includes an arc-extinguishing baffle 11, two arc-blocking plates 12, and two reflective parts 13. The arc-extinguishing baffle 11 is connected to the arc-blocking plates 12 on opposite sides, and a first crease 14 is formed at the connection. The arc-blocking plates 12 are bent along the first crease 14. Each arc-blocking plate 12 is connected to a reflective part 13, and a second crease 15 is formed at the connection. The second crease 15 is parallel to the first crease 14. The two reflective parts 13 are bent along the second crease 15 and are spaced apart. The reflective parts 13, the arc-blocking plates 12, and the arc-extinguishing baffle 11 enclose an arc-extinguishing chamber. The arc-extinguishing grid plate 2 has magnetizing angles 21 on both sides. The reflective part 13 has an isolation groove 131. The arc-extinguishing grid plate 2 is disposed in the arc-extinguishing chamber, and the magnetizing angles 21 are placed in the isolation groove 131.

[0051] Two arc-blocking plates 12 are connected to the opposite sides of the arc-extinguishing baffle 11, and each arc-blocking plate 12 is connected to a reflective part 13. The arc-blocking plate 12 is bent along the first crease 14, and the reflective part 13 is bent along the second crease 15, so that the reflective part 13, the arc-blocking plate 12 and the arc-extinguishing baffle 11 form an arc-extinguishing chamber. This simplifies the assembly steps, makes it less likely to have assembly deviations, and there are no gaps between the reflective part 13, the arc-blocking plate 12 and the arc-extinguishing baffle 11, which improves the reliability of reflection and arc blocking. The magnetizing angle 21 of the arc-extinguishing grid plate 2 is placed in the isolation groove 131 of the reflective part 13. The setting of the isolation groove 131 can prevent the arc generated when the circuit breaker breaks from burning the magnetizing angle 21, ensuring that the magnetizing angle 21 can improve the breaking capacity of the circuit breaker and shorten the breaking time of the circuit breaker.

[0052] In some embodiments, the arc-blocking plate 12, the first crease 14, and the arc-extinguishing baffle 11 are integrally connected structures. The arc-blocking plate 12 can be folded along the first crease 14, which reduces the number of parts, lowers the production cost and management difficulty of the parts, and simplifies the assembly steps.

[0053] In other embodiments, the first crease 14 is integrally connected to one of the arc-blocking plate 12 and the arc-extinguishing baffle 11. The other of the arc-blocking plate 12 and the arc-extinguishing baffle 11 is connected to the first crease 14 by welding or bonding, so that there is no gap in the connection between the arc-blocking plate 12 and the arc-extinguishing baffle 11, which does not affect the arc-extinguishing effect of the arc-extinguishing chamber.

[0054] An arc-extinguishing baffle 11 is provided in the arc-extinguishing chamber to ensure the protection level of the product enclosure and prevent foreign objects from entering the arc-extinguishing chamber and affecting the performance of the circuit breaker. In some embodiments, the arc-extinguishing baffle 11 is provided with an exhaust channel 111 to allow the exhaust of high-temperature gas generated when the moving and stationary contacts break.

[0055] In some embodiments, each arc-extinguishing plate 12 is provided with a first slot 121, and the arc-extinguishing grid plate 2 is provided with first pins 24 on opposite sides. The first pins 24 are inserted into the first slots 121 on the corresponding sides, thereby fixing the arc-extinguishing grid plate 2 in the arc-extinguishing chamber. Exemplarily, each arc-extinguishing grid plate 2 is provided with two first pins 24 on opposite sides, and the first slots 121 are correspondingly arranged with the first pins 24. Multiple arc-extinguishing grid plates 2 are typically provided in the arc-extinguishing chamber.

[0056] Continue to refer to Figure 2 and Figure 3As shown, in some embodiments, the reflective part 13 includes a first reflective plate 132 and a second reflective plate 133. The first reflective plate 132 is connected to the arc-blocking plate 12, and a second crease 15 is formed at the connection. Specifically, the first reflective plate 132, the arc-blocking plate 12, and the second crease 15 can be an integrally connected structure, or the second crease 15 can be an integrally connected structure with one of the first reflective plate 132 and the arc-blocking plate 12. The other of the first reflective plate 132 and the arc-blocking plate 12 is connected to the second crease 15 by welding or bonding. The first reflective plate 132 is bent along the second crease 15 and is disposed opposite to the arc-extinguishing baffle 11. The second reflective plate 133 is connected to the first reflective plate 132, and a third crease 134 is formed at the connection. The third crease 134 is parallel to the second crease 15. The second reflective plate 133 is bent towards the arc-extinguishing chamber along the third crease 134. The second reflective plate 133, the first reflective plate 132, and the arc-blocking plate 12 form an isolation groove 131. When assembling the arc-extinguishing chamber, the first reflector 132 is bent along the second fold 15 so that the first reflector 132 is positioned opposite the arc-extinguishing baffle 11. Optionally, the first reflector 132 is parallel to the arc-extinguishing baffle 11. Then, the second reflector 133 is bent along the third fold 134. Optionally, the second reflector 133 is parallel to the arc-blocking plate 12. The assembly steps are simple.

[0057] Optionally, the second reflector 133, the first reflector 132, and the third fold 134 can be an integrally connected structure. The second reflector 133 can be folded along the third fold 134, reducing the number of parts, lowering production costs and management difficulty, and simplifying assembly steps. Alternatively, the third fold 134 can be integrally connected to one of the second reflector 133 and the first reflector 132, while the other of the second reflector 133 and the first reflector 132 can be connected to the third fold 134 by welding or bonding, ensuring that there are no gaps in the connection between the second reflector 133 and the first reflector 132 and not affecting the arc-extinguishing effect of the arc-extinguishing chamber.

[0058] The first crease 14, the second crease 15, and the third crease 134 are all arc-shaped creases, which enhance the bending strength of each part of the arc-extinguishing chamber plate 1 and improve the visual aesthetics.

[0059] like Figure 3 , Figure 4 and Figure 5As shown, optionally, an arc-extinguishing grid plate 2 has an arc-receiving groove 22 recessed on one side edge, and the arc-extinguishing grid plate 2 is provided with first pins 24 on both sides of the arc-receiving groove 22. Magnetizing angles 21 are provided at the ends of the opposite side walls of the arc-receiving groove 22. When the arc-extinguishing grid plate 2 is installed into the arc-extinguishing chamber, the two ends of the arc-extinguishing grid plate 2 are inserted into the corresponding isolation grooves 131, thereby placing the magnetizing angles 21 within the isolation grooves 131. Two fixing grooves 23 are provided at intervals at the bottom of the arc-receiving groove 22. The end of the second reflector plate 133 facing away from the third crease 134 is inserted into the fixing groove 23, achieving the positioning and installation of the second reflector plate 133, and cooperating with the first reflector plate 132 and the arc-blocking plate 12 to wrap around the magnetizing angles 21.

[0060] The distance between the two second reflectors 133 gradually increases from the end where the second reflector 133 is connected to the first reflector 132 to the other end, thereby enhancing the efficiency of high-temperature gas discharge from the arc-extinguishing chamber by utilizing the pressure difference.

[0061] See also Figure 2 and Figure 3 As shown, in some embodiments, an upper baffle 16 is provided between the two arc-extinguishing plates 12. One end of the upper baffle 16 is connected to the side of the arc-extinguishing baffle 11, forming a fourth crease 17 at the connection. The other end of the upper baffle 16 is provided with two first insert plates 161 spaced apart. The upper baffle 16 is bent along the fourth crease 17 and placed on the top of the arc-extinguishing chamber. The first insert plates 161 are inserted into the isolation groove 131. The upper baffle 16 is provided with an exhaust hole 162. Gas generated when the moving and stationary contacts break can be discharged through the exhaust hole 162. The exhaust hole 162 on the upper baffle 16 is correspondingly set with the vent hole of the circuit breaker cover. The exhaust hole 162 on the upper baffle 16 can guide high-temperature gas to be discharged through the vent hole. The first insert plates 161 are inserted into the isolation groove 131 to fix the position of the upper baffle 16, so that the upper baffle 16 seals the top of the arc-extinguishing chamber and prevents high-temperature gas from spreading and affecting other components inside the circuit breaker.

[0062] like Figure 6 and Figure 7 As shown, in some other embodiments, the upper baffle 16 is provided with second pins 163 on opposite sides, and the two arc-blocking plates 12 are respectively provided with second slots 122. The second pins 163 are inserted into the corresponding second slots 122 to achieve stable fixation of the upper baffle 16.

[0063] Optionally, the first insert plate 161 is provided with a third pin 164 at one end away from the upper baffle 16, and the wall of the isolation groove 131 is provided with a third slot 135. Specifically, the first reflector plate 132 is provided with a third slot 135, and the third pin 164 is inserted into the third slot 135 to achieve stable fixation of the upper baffle 16.

[0064] like Figure 8and Figure 9 As shown, in some embodiments, each arc-blocking plate 12 has a folding foot 123 at its top edge. The folding foot 123 can be bent and abut against the upper baffle 16 located outside the arc-extinguishing chamber, thereby stably fixing the upper baffle 16 and preventing it from flipping outward. Optionally, a cutting slit is formed on the arc-blocking plate 12 by cutting diagonally downward from its top edge. The plate material placed above the cutting slit is the folding foot 123. The folding foot 123 is bent inward so that it presses against the upper baffle 16.

[0065] like Figure 10 and Figure 11 As shown, in some embodiments, a third insert plate 165 is provided between the two first insert plates 161. One end of the third insert plate 165 is connected to the other end of the upper baffle 16, and the other end of the third insert plate 165 is bent and placed between the two reflective parts 13. The side of the third insert plate 165 abuts against the reflective part 13 and applies a pressing force to the reflective part 13, so that the first insert plate 161 and the isolation groove 131 form an interference fit, thereby forming a limiting structure for positioning the upper baffle 16 and preventing the upper baffle 16 from flipping outward. When the second reflective plate 133 is inserted into the fixing groove 23 of the arc-extinguishing grid plate 2, the side of the third insert plate 165 abuts against the second reflective plate 133, so that the second reflective plate 133 is stably inserted into the fixing groove 23.

[0066] like Figure 12 and Figure 13 As shown, in some other embodiments, the first insert plate 161 is bent at one end away from the upper baffle 16 and the bent part abuts against the wall of the isolation groove 131, forming an interference fit with the wall of the isolation groove 131, forming a limiting structure for positioning the upper baffle 16 and preventing the upper baffle 16 from flipping outward.

[0067] In some embodiments, the upper baffle 16, the fourth crease 17, and the arc-suppressing baffle 11 are integrally connected structures. The upper baffle 16 can be folded along the fourth crease 17, which reduces the number of parts, lowers the production cost and management difficulty of the parts, and simplifies the assembly steps.

[0068] In other embodiments, the fourth crease 17 is integrally connected to one of the upper baffle 16 and the arc-extinguishing baffle 11. The other of the upper baffle 16 and the arc-extinguishing baffle 11 is connected to the fourth crease 17 by welding or bonding, so that there is no gap in the connection between the upper baffle 16 and the arc-extinguishing baffle 11, which does not affect the arc-extinguishing effect of the arc-extinguishing chamber.

[0069] The fourth crease 17 is an arc-shaped crease, which enhances the bending strength of the arc-extinguishing chamber plate 1 and improves the visual aesthetics.

[0070] Combination Figure 2 and Figure 14As shown, in some embodiments, a lower baffle 18 is provided between the two arc-extinguishing plates 12. One end of the lower baffle 18 is connected to the side of the arc-extinguishing baffle 11, forming a fifth crease 19 at the connection. The lower baffle 18 is bent along the fifth crease 19 and placed at the bottom of the arc-extinguishing chamber. The lower baffle 18 is provided with a receiving hole 181 for the stationary contact of the stationary contact to pass through and be placed in the arc-extinguishing chamber. The moving and stationary contacts are placed on both sides of the lower baffle 18, with the stationary contact on the outside of the lower baffle 18 and the moving contact on the inside of the lower baffle 18. The lower baffle 18 serves to isolate the moving and stationary contacts, increasing the electrical clearance between them and preventing abnormal burning of the moving and stationary contacts. The receiving hole 181 is only for the stationary contact of the stationary contact to pass through so as to facilitate engagement with the moving contact.

[0071] Optionally, based on the structure of the reflector 13 described above, the bottom of the second reflector 133 is recessed within the first reflector 132 to form a clearance groove. The lower baffle 18 is bent and housed within the clearance groove. The lower baffle 18 is placed within the space enclosed by the first reflector 132 and the arc-blocking plate 12. The outer side of the lower baffle 18 is flush with the bottom of the first reflector 132, and the inner side of the lower baffle 18 abuts against the second reflector 133.

[0072] See also Figure 6 and Figure 7 As shown, in some other embodiments, the lower baffle 18 is provided with a fourth pin 182 on both sides, and the two arc-blocking plates 12 are respectively provided with a fourth slot 124. The fourth pin 182 is inserted into the corresponding fourth slot 124 to achieve stable fixation of the lower baffle 18 and prevent the lower baffle 18 from flipping outward.

[0073] The lower baffle 18 is provided with a fifth pin 183 at one end away from the arc-extinguishing baffle 11, and the reflective part 13 is provided with a fifth slot 136. The fifth pin 183 is inserted into the fifth slot 136 to achieve stable fixation of the lower baffle 18 and prevent the lower baffle 18 from flipping outward.

[0074] See Figure 10 and Figure 11 As shown, in some embodiments, a fourth insert plate 184 is provided at the end of the lower baffle 18 away from the arc-extinguishing baffle 11. One end of the fourth insert plate 184 is connected to the lower baffle 18, and the other end of the fourth insert plate 184 is bent and placed between the two reflective parts 13. The side of the fourth insert plate 184 abuts against the reflective part 13 to position the lower baffle 18 and prevent the lower baffle 18 from flipping outward. When the second reflective plate 133 is inserted into the fixing groove 23 of the arc-extinguishing grid plate 2, the side of the fourth insert plate 184 abuts against the second reflective plate 133, so that the second reflective plate 133 is stably inserted into the fixing groove 23.

[0075] See Figure 12 and Figure 13As shown, in some other embodiments, the lower baffle 18 is provided with two fifth insert plates 185 at intervals at one end away from the arc-extinguishing baffle 11. One end of the fifth insert plate 185 is connected to the lower baffle 18, and the other end of the fifth insert plate 185 is bent and inserted into the isolation groove 131. The bent part of the fifth insert plate 185 abuts against the groove wall of the isolation groove 131 and forms an interference fit with the groove wall of the isolation groove 131, forming a limiting structure for positioning the lower baffle 18 and preventing the lower baffle 18 from flipping outward.

[0076] In some embodiments, the lower baffle 18, the fifth crease 19, and the arc-extinguishing baffle 11 are integrally connected structures. The lower baffle 18 can be folded along the fifth crease 19, which reduces the number of parts, lowers the production cost and management difficulty of the parts, and simplifies the assembly steps.

[0077] In other embodiments, the fifth crease 19 is integrally connected to one of the lower baffle 18 and the arc-extinguishing baffle 11. The other of the lower baffle 18 and the arc-extinguishing baffle 11 is connected to the fifth crease 19 by welding or bonding, so that there is no gap in the connection between the lower baffle 18 and the arc-extinguishing baffle 11, which does not affect the arc-extinguishing effect of the arc-extinguishing chamber.

[0078] The fifth crease 19 is an arc-shaped crease, which enhances the bending strength of the arc-extinguishing chamber plate 1 and improves the visual aesthetics.

[0079] This embodiment also provides a circuit breaker, including a housing and the aforementioned arc-extinguishing chamber, which is disposed within the housing. The housing also includes a moving contact and a stationary contact. The stationary contact's stationary contact point passes through the receiving hole 181 of the lower baffle 18. One end of the moving contact with the moving contact point is positioned between two reflectors 13. The movement of the moving contact allows it to engage or disengage with the stationary contact. The arc generated when the moving contact and stationary contact disengage is reflected by the reflectors 13 into the arc-extinguishing area within the arc-extinguishing chamber, preventing the arc from spreading to other components within the circuit breaker. Simultaneously, the reflectors 13 also assist in dissipating arc energy. An arc-blocking plate 12 is used to fix the arc-extinguishing grid 2 and confines the arc within the arc-extinguishing chamber, using the arc-extinguishing grid 2 to accelerate the arc dissipation speed. The arc-extinguishing baffle 11 prevents foreign objects from entering the arc-extinguishing chamber and affecting the circuit breaker's performance.

[0080] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An arc-extinguishing chamber, characterized in that, include: An arc-extinguishing chamber plate (1) includes an arc-extinguishing baffle (11), two arc-blocking plates (12), and two reflective parts (13). The arc-extinguishing baffle (11) is connected to the arc-blocking plates (12) on opposite sides and forms a first crease (14) at the connection. The arc-blocking plates (12) are bent along the first crease (14). Each arc-blocking plate (12) is connected to the reflective part (13) and forms a second crease (15) at the connection. The second crease (15) is parallel to the first crease (14). The two reflective parts (13) are bent along the second crease (15) and are spaced apart. The reflective parts (13), the arc-blocking plates (12), and the arc-extinguishing baffle (11) surround and form an arc-extinguishing chamber. An arc-extinguishing grid plate (2) is provided with magnetizing angles (21) on both sides. The reflective part (13) has an isolation groove (131). The arc-extinguishing grid plate (2) is disposed in the arc-extinguishing chamber, and the magnetizing angles (21) are placed in the isolation groove (131).

2. The arc-extinguishing chamber according to claim 1, characterized in that, The reflective part (13) includes a first reflective plate (132) and a second reflective plate (133). The first reflective plate (132) is connected to the arc-blocking plate (12) and a second crease (15) is formed at the connection. The first reflective plate (132) is bent along the second crease (15) and is disposed opposite to the arc-extinguishing baffle (11). The second reflective plate (133) is connected to the first reflective plate (132) and a third crease (134) is formed at the connection. The third crease (134) is parallel to the second crease (15). The second reflective plate (133) is bent towards the arc-extinguishing chamber along the third crease (134). The second reflective plate (133), the first reflective plate (132), and the arc-blocking plate (12) surround and form the isolation groove (131).

3. The arc-extinguishing chamber according to claim 2, characterized in that, The arc-extinguishing grid plate (2) has an arc receiving groove (22) recessed on one side edge. The ends of the opposite side walls of the arc receiving groove (22) are respectively provided with the magnetizing angle (21). The bottom of the arc receiving groove (22) is provided with two fixing grooves (23) spaced apart. The end of the second reflector (133) away from the third crease (134) is inserted into the fixing groove (23).

4. The arc-extinguishing chamber according to claim 2, characterized in that, The distance between the two second reflectors (133) gradually increases from the end where the second reflector (133) is connected to the first reflector (132) to the other end.

5. The arc-extinguishing chamber according to claim 1, characterized in that, Each of the arc-blocking plates (12) is provided with a first slot (121), and the arc-extinguishing grid plate (2) is provided with a first pin (24) on each of its opposite sides. The first pin (24) is inserted into the first slot (121) on the corresponding side. And / or, the arc-extinguishing baffle (11) is provided with an exhaust channel (111).

6. The arc-extinguishing chamber according to any one of claims 1-5, characterized in that, An upper baffle (16) is provided between the two arc-blocking plates (12). One end of the upper baffle (16) is connected to the side of the arc-extinguishing baffle (11) and a fourth crease (17) is formed at the connection. Two first insert plates (161) are provided at intervals at the other end of the upper baffle (16). The upper baffle (16) is bent along the fourth crease (17) and placed on the top of the arc-extinguishing chamber. The first insert plates (161) are inserted into the isolation groove (131). An exhaust hole (162) is provided on the upper baffle (16).

7. The arc-extinguishing chamber according to claim 6, characterized in that, The upper baffle (16) is provided with second pins (163) on opposite sides, and the two arc-blocking plates (12) are respectively provided with second slots (122), and the second pins (163) are inserted into the corresponding second slots (122); And / or, the first insert plate (161) is provided with a third insert (164) at one end away from the upper baffle (16), and the wall of the isolation groove (131) is provided with a third slot (135), and the third insert (164) is inserted into the third slot (135).

8. The arc-extinguishing chamber according to claim 6, characterized in that, Each of the arc-blocking plates (12) has a folding foot (123) at its top edge. The folding foot (123) can be bent and placed against the upper baffle (16) on one side of the arc-extinguishing chamber.

9. The arc-extinguishing chamber according to claim 6, characterized in that, A third insert (165) is provided between the two first inserts (161). One end of the third insert (165) is connected to the other end of the upper baffle (16). The other end of the third insert (165) is bent and placed between the two reflective parts (13). The side of the third insert (165) abuts against the reflective part (13).

10. The arc-extinguishing chamber according to claim 6, characterized in that, The first insert plate (161) is bent at one end away from the upper baffle (16), and the bent part abuts against the groove wall of the isolation groove (131).

11. The arc-extinguishing chamber according to any one of claims 1-5, characterized in that, A lower baffle (18) is provided between the two arc-blocking plates (12). One end of the lower baffle (18) is connected to the side of the arc-extinguishing baffle (11) and a fifth crease (19) is formed at the connection. The lower baffle (18) is bent along the fifth crease (19) and placed at the bottom of the arc-extinguishing chamber. The lower baffle (18) is provided with a receiving hole (181). The receiving hole (181) is used for the stationary contact of the stationary contact to pass through and be placed in the arc-extinguishing chamber.

12. The arc-extinguishing chamber according to claim 11, characterized in that, The lower baffle (18) is provided with a fourth pin (182) on both sides, and the two arc-blocking plates (12) are respectively provided with a fourth slot (124). The fourth pin (182) is inserted into the corresponding fourth slot (124). And / or, the lower baffle (18) is provided with a fifth pin (183) at the end opposite to the arc-extinguishing baffle (11), and the reflective part (13) is provided with a fifth slot (136), and the fifth pin (183) is inserted into the fifth slot (136).

13. The arc-extinguishing chamber according to claim 11, characterized in that, The lower baffle (18) is provided with a fourth insert plate (184) at one end away from the arc-extinguishing baffle (11). One end of the fourth insert plate (184) is connected to the lower baffle (18), and the other end of the fourth insert plate (184) is bent and placed between the two reflective parts (13). The side of the fourth insert plate (184) abuts against the reflective part (13).

14. The arc-extinguishing chamber according to claim 11, characterized in that, The lower baffle (18) is provided with two fifth insert plates (185) at intervals at one end away from the arc-extinguishing baffle (11). One end of the fifth insert plate (185) is connected to the lower baffle (18), and the other end of the fifth insert plate (185) is bent and inserted into the isolation groove (131). The bent part of the fifth insert plate (185) abuts against the groove wall of the isolation groove (131).

15. A circuit breaker, characterized in that, It includes a housing and an arc-extinguishing chamber as described in any one of claims 1-14, wherein the arc-extinguishing chamber is disposed within the housing.

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