Static contact assembly and circuit breaker

Abstract

The embodiment of the utility model provides a static contact assembly and a circuit breaker, and relates to the field of circuit breakers. The circuit breaker comprises a static contact assembly, and the static contact assembly comprises a static contact plate and an arc striking sheet. The static contact plate comprises a reverse bending part and a straight part which are connected in sequence, the reverse bending part is provided with a static contact, one end, far away from the straight part, of the reverse bending part is provided with a connecting part, and the straight part is provided with a first cavity. The arc striking piece comprises a matching part and an arc guiding part which are connected in sequence, the matching part is connected with the connecting part, the arc guiding part is located between the connecting part and the straight part, at least part of orthographic projection of the end, away from the matching part, of the arc guiding part on the preset plane is located in orthographic projection of the first cavity on the preset plane, and the preset plane is parallel to the straight part; therefore, the relative area between one end, far away from the matching part, of the arc guide part and the straight part can be increased, and the situation of parallel current can be reduced when the movable contact and the static contact are disconnected, so that the transfer effect of the arc is ensured.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority of a Chinese patent application with the application number 2024208884743, titled "A Static Contact Assembly and a Circuit Breaker", filed with the Chinese Patent Office on April 26, 2024, the entire content of which is incorporated herein by reference. Technical field

[0003] The present utility model relates to the field of circuit breakers, and more particularly, to a static contact assembly and a circuit breaker. Background technique

[0004] A circuit breaker mainly realizes the on - off of a circuit through the on - off of a moving contact and a static contact assembly. During normal operation, the moving contact and the static contact are in close contact to form a conductive loop; when it is necessary to cut off the current, the moving contact and the static contact are separated to interrupt the current.

[0005] After research by the inventor, it is found that when the static contact and the moving contact of some existing static contact assemblies are disconnected, a parallel current is likely to occur at the input current end, thus affecting the effect of arc transfer. Summary of the utility model

[0006] The purpose of the present utility model is to provide a static contact assembly that can reduce the occurrence of parallel current when the moving contact and the static contact are disconnected, so as to ensure the arc transfer effect.

[0007] The embodiments of the present utility model are implemented as follows:

[0008] In a first aspect, the present utility model provides a static contact assembly, including:

[0009] A static contact plate, which includes a reversely bent portion and a straight portion connected in sequence. The reversely bent portion is provided with a static contact, a connecting portion is provided at one end of the reversely bent portion away from the straight portion, and a first cavity is formed in the straight portion.

[0010] An arc - guiding piece, which includes a mating portion and an arc - guiding portion connected in sequence. The mating portion is connected to the connecting portion, the arc - guiding portion is located between the connecting portion and the straight portion, and the positive projection of the end of the arc - guiding portion away from the mating portion on a preset plane is at least partially within the positive projection of the first cavity on the preset plane, and the preset plane is parallel to the straight portion.

[0011] In an alternative embodiment, the positive projection of the end of the arc - guiding portion away from the mating portion on the preset plane is within the positive projection of the first cavity on the preset plane.

[0012] In an alternative embodiment, the reverse bending portion has opposite first and second sides, the second side is opposite to the straight portion, and the connecting portion and the static contact are both disposed on the first side; and / or the positive projection of the arc guiding portion on the preset plane is within the positive projection of the first cavity on the preset plane.

[0013] In an alternative embodiment, the connecting portion is a convex portion, and the fitting portion is provided with a riveting hole, and the riveting hole is riveted to the convex portion.

[0014] In an alternative embodiment, the fitting portion includes a fitting plate and two limiting plates. The two limiting plates are spaced apart along the width direction of the fitting plate. The fitting plate is connected to the connecting portion, the fitting plate is connected to the arc guiding portion, and the two limiting plates are respectively located on both sides of the reverse bending portion in the width direction.

[0015] In an alternative embodiment, the arc guiding portion includes a first arc guiding plate and a second arc guiding plate which are sequentially connected at an angle. The first arc guiding plate extends towards the direction close to the straight portion, the first arc guiding plate is connected to the fitting portion, and the second arc guiding plate is located between the straight portion and the connecting portion and forms an angle with the straight portion.

[0016] In an alternative embodiment, the static contact assembly further includes an insulating cover. The insulating cover is provided with a second cavity. One side of the insulating cover abuts against the side of the straight portion close to the connecting portion. The second cavity is used for exposing the static contact and the arc initiating piece, and the end of the arc guiding portion away from the fitting portion is located in the second cavity.

[0017] In an alternative embodiment, the second cavity includes a first cavity section and a second cavity section which are sequentially connected. The static contact and the connecting portion are exposed in the first cavity section, the end of the arc guiding portion away from the fitting portion is located in the second cavity section, and an insulating wall protrudes from the inner wall of the second cavity section towards the direction of the first cavity. The insulating wall is opposite to the inner wall of the first cavity.

[0018] In an alternative embodiment, the insulating cover includes a first cover body and a second cover body which are sequentially connected. One side of the second cover body abuts against the side of the straight portion close to the connecting portion. The second cover body is provided with a second cavity. The first cover body covers the reverse bending portion, and the static contact is exposed outside the first cover body.

[0019] In a second aspect, the present utility model provides a circuit breaker, including the static contact assembly according to any one of the foregoing embodiments.

[0020] The beneficial effects of the embodiments of the present utility model are as follows: A static contact assembly and a circuit breaker provided by the embodiments of the present utility model, the circuit breaker includes a static contact assembly, and the static contact assembly includes a static contact plate and an arc guide piece. The static contact plate includes a reversely bent portion and a straight portion connected in sequence. The reversely bent portion is provided with a static contact point. One end of the reversely bent portion far from the straight portion is provided with a connecting portion. The straight portion is provided with a first cavity. The arc guide piece includes a matching portion and an arc guiding portion connected in sequence. The matching portion is connected to the connecting portion. The arc guiding portion is located between the connecting portion and the straight portion. The orthographic projection of one end of the arc guiding portion far from the matching portion on a preset plane is at least partially within the orthographic projection of the first cavity on the preset plane. The preset plane is parallel to the straight portion, which can increase the relative area between one end of the arc guiding portion far from the matching portion and the straight portion, and can reduce the occurrence of parallel current when the moving contact and the static contact are disconnected, so as to ensure the arc transfer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 is a schematic structural diagram of the static contact assembly provided by the embodiments of the present utility model;

[0023] Figure 2 is an exploded schematic diagram of the static contact assembly provided by the embodiments of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the static contact plate provided by the embodiments of the present utility model;

[0025] Figure 4 is a schematic structural diagram of the insulating cover provided by the embodiments of the present utility model.

[0026] Reference numerals: 1 - static contact assembly; 100 - static contact plate; 110 - straight portion; 111 - first cavity; 120 - reversely bent portion; 121 - first connecting plate; 122 - second connecting plate; 1221 - static contact point; 1222 - connecting portion; 123 - first side; 124 - second side; 200 - arc guide piece; 210 - matching portion; 211 - riveting hole; 220 - arc guiding portion; 221 - first arc guiding plate; 222 - second arc guiding plate; 300 - insulating cover; 310 - first cover body; 320 - second cover body; 321 - second cavity; 3211 - first cavity segment; 3212 - second cavity segment; 3213 - insulating wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0031] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] The following will introduce in detail the specific structure of a static contact assembly provided by an embodiment of the present invention and the corresponding technical effects brought thereby in conjunction with the patent drawings.

[0034] Please refer to Figures 1-4 , a static contact assembly 1 provided by an embodiment of the present invention includes a static contact plate 100 and an arc guide piece 200.

[0035] The static contact plate 100 includes a reverse bending part 120 and a straight part 110 connected in sequence. It should be noted that, in this embodiment, the straight part 110 is a flat plate, and the reverse bending part 120 includes a first connecting plate 121 and a second connecting plate 122 connected at an angle. One end of the first connecting plate 121 far from the second connecting plate 122 is connected to the straight part 110, the second connecting plate 122 is opposite to the straight part 110, and the straight part 110 is provided with a first cavity 111.

[0036] The reverse bending part 120 is provided with a static contact point 1221, and a connecting part 1222 is provided at one end of the reverse bending part 120 far from the straight part 110. That is to say, the second connecting plate 122 is provided with a static contact point 1221, and a connecting part 1222 is provided at one end of the second connecting plate 122 far from the first connecting plate 121.

[0037] The arc guide piece 200 includes a matching part 210 and an arc guiding part 220 connected in sequence. The matching part 210 is connected to the connecting part 1222, the arc guiding part 220 is located between the connecting part 1222 and the straight part 110, and the positive projection of one end of the arc guiding part 220 far from the matching part 210 on a preset plane is at least partially within the positive projection of the first cavity 111 on the preset plane. The preset plane is parallel to the straight part 110. It should be noted that the positive projection of one end of the arc guiding part 220 far from the matching part 210 can be understood as the projection of one end of the arc guiding part 220 far from the matching part 210 in the direction perpendicular to the preset plane.

[0038] In some existing static contact assemblies 1, one end of the arc guiding part 220 far from the matching part 210 is not directly opposite to the first cavity 111, but is arranged close to the outer wall of the straight part 110. Or in some other static contact assemblies 1, one end of the arc guiding part 220 far from the matching part 210 is located within the first cavity 111. Since the arc guiding part 220 is closer to the straight part 110, and if the arc energy is large enough, or the switching breaking speed is not fast enough, the arc may form a parallel path from the moving contact to the static contact plate 100 and then through the arc guide piece 200 and the static contact terminal, thus affecting the effect of arc transfer.

[0039] In this embodiment, the positive projection of the end of the arc guiding portion 220 away from the mating portion 210 is at least partially within the positive projection of the first cavity 111 on a preset plane, and the arc guiding portion 220 is located between the connecting portion 1222 and the straight portion 110. Therefore, through the above arrangement, the relative area between the end of the arc guiding portion 220 away from the mating portion 210 and the straight portion 110 can be increased, and when the moving contact and the static contact 1221 are disconnected, the occurrence of parallel current can be reduced to ensure the arc transfer effect.

[0040] Optionally, in this embodiment, the positive projection of the end of the arc guiding portion 220 away from the mating portion 210 on the preset plane is within the positive projection of the first cavity 111 on the preset plane. That is to say, the end of the arc guiding portion 220 away from the mating portion 210 has no area opposite to the outer wall of the straight portion 110, and when the moving contact and the static contact 1221 are disconnected, the occurrence of parallel current is further reduced.

[0041] In this embodiment, the positive projection of the arc guiding portion 220 on the preset plane is within the positive projection of the first cavity 111 on the preset plane.

[0042] Optionally, the reverse bending portion 120 has opposite first side 123 and second side 124, the second side 124 faces the straight portion 110, and the connecting portion 1222 and the static contact 1221 are both arranged on the first side 123. Specifically, the connecting portion 1222 and the static contact 1221 are both arranged on the side of the second connecting plate 122 away from the straight portion 110, which is convenient for the operator to connect the arc leading plate.

[0043] Of course, in some other embodiments, the connecting portion 1222 can also be arranged on the second side 124 of the second connecting plate 122.

[0044] Optionally, the above-mentioned connecting portion 1222 is a convex portion, and the mating portion 210 is provided with a riveting hole 211, and the riveting hole 211 is riveted to the convex portion. Of course, in some other embodiments, the mating portion 210 can be provided with a convex portion, and the connecting portion 1222 can be a riveting hole 211.

[0045] Of course, in some other embodiments, the arc leading piece 200 and the static contact plate 100 can also be connected by other structures.

[0046] Optionally, in order to ensure the stability of the connection between the arc - starting piece 200 and the static contact plate 100, the mating part 210 includes a mating plate and two limiting plates (not shown in the figure). The two limiting plates are arranged at intervals along the width direction of the mating plate. The two limiting plates and the mating plate jointly define a clamping groove that mates with the reverse - bending part 120. The mating plate is connected to the connecting part 1222. The two limiting plates are respectively located on both sides of the reverse - bending part 120 in the width direction. Specifically, the mating part 210 abuts against the first side 123 of the second connecting plate 122, and the mating part 210 is riveted to the connecting part 1222. The two limiting plates are respectively located on both sides of the second connecting plate 122 in the width direction. Through the two limiting plates, the assembly efficiency of the mating part 210 and the connecting part 1222 can be improved.

[0047] The arc - guiding part 220 includes a first arc - guiding plate 221 and a second arc - guiding plate 222 that are sequentially connected at an angle. The first arc - guiding plate 221 extends towards the straight part 110. The first arc - guiding plate 221 is connected to the mating part 210. That is to say, the first arc - guiding plate 221 is connected to the mating plate. The second arc - guiding plate 222 is located between the straight part 110 and the connecting part 1222 and forms an angle with the straight part 110. It can be understood that since the first arc - guiding plate 221 extends towards the straight part 110, the space for preventing the arc - extinguishing grid plate can be increased, thereby improving its arc - extinguishing efficiency.

[0048] Optionally, the second arc - guiding plate 222 can also extend towards the straight part 110. Of course, in some other embodiments, the second arc - guiding plate 222 can be parallel to the straight part 110.

[0049] Optionally, in this embodiment, the static contact assembly 1 further includes an insulating cover 300. The insulating cover 300 is provided with a second cavity 321. One side of the insulating cover 300 abuts against the side of the straight part 110 close to the connecting part 1222. The second cavity 321 is used for exposing the static contact point 1221 and the arc - starting piece 200. That is to say, the length of the second cavity 321 is longer than that of the arc - starting piece 200, and the minimum width dimension of the second cavity 321 is larger than the maximum width dimension of the arc - starting piece 200. Moreover, the end of the arc - guiding part 220 far from the second mating part 210 is located in the second cavity 321, which can reduce the relative area between the arc - guiding part 220 and the straight part 110 through the insulating cover 300.

[0050] Specifically, the second cavity 321 includes a first cavity end and a second cavity segment 3212 connected in sequence. The stationary contact 1221 and the connecting portion 1222 are exposed in the first cavity segment 3211. One end of the arc guiding portion 220 away from the mating portion 210 is located in the second cavity segment 3212. That is to say, the minimum width dimension of the second cavity segment 3212 is greater than the maximum width dimension of the arc leading piece 200. Among them, an insulating wall 3213 protrudes from the inner wall of the second cavity segment 3212 towards the direction of the first cavity 111. The insulating wall 3213 faces the inner wall of the first cavity 111. That is to say, the width dimension of the second cavity segment 3212 is smaller than the width dimension of the first cavity 111. By providing the protruding insulating wall 3213, the situation of parallel current can be further reduced to ensure the arc transfer effect.

[0051] The insulating cover 300 includes a first cover body 310 and a second cover body 320 connected in sequence. One side of the second cover body 320 abuts against the side of the straight portion 110 close to the connecting portion 1222. The second cover body 320 is provided with a second cavity 321. The first cover body 310 covers the reverse bending portion 120, and the stationary contact 1221 is exposed outside the first cover body 310.

[0052] That is to say, the second cover body 320 covers the straight portion 110. In order to expose a part of the reverse bending portion 120, that is, in order to expose a part of the second connecting plate 122 and the connecting portion 1222 and the stationary contact 1221 on the connecting plate, the second cover body 320 is provided with a second cavity 321. The first cover body 310 also covers the first connecting plate 121 and a part of the second connecting plate 122. By providing the first cover body 310, the connection strength between the insulating cover 300 and the stationary contact plate 100 can be improved.

[0053] The embodiment of the present utility model also provides a circuit breaker, including the above-mentioned stationary contact assembly 1. It should be noted that since the circuit breaker includes the above-mentioned stationary contact assembly 1 and the beneficial effects possessed by the stationary contact assembly 1, the circuit breaker also has the same beneficial effects. Therefore, the technical effects of the circuit breaker will not be elaborated herein.

[0054] In summary, a static contact assembly 1 and a circuit breaker provided by an embodiment of the present utility model. The circuit breaker includes the static contact assembly 1, and the static contact assembly 1 includes a static contact plate 100 and an arc guide piece 200. The static contact plate 100 includes a reverse bending portion 120 and a straight portion 110 connected in sequence. The reverse bending portion 120 is provided with a static contact point 1221. One end of the reverse bending portion 120 away from the straight portion 110 is provided with a connecting portion 1222. The straight portion 110 is provided with a first cavity 111. The arc guide piece 200 includes a matching portion 210 and an arc guiding portion 220 connected in sequence. The matching portion 210 is connected to the connecting portion 1222. The arc guiding portion 220 is located between the connecting portion 1222 and the straight portion 110. The positive projection of the end of the arc guiding portion 220 away from the matching portion 210 on a preset plane is at least partially within the positive projection of the first cavity 111 on the preset plane. The preset plane is parallel to the straight portion 110, which can increase the relative area between the end of the arc guiding portion 220 away from the matching portion 210 and the straight portion 110, and can reduce the occurrence of parallel current when the moving contact and the static contact point 1221 are disconnected, so as to ensure the arc transfer effect.

[0055] The foregoing is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A static contact component, characterized in that, Comprising: A static contact plate (100), the static contact plate (100) includes a reverse bending portion (120) and a straight portion (110) connected in sequence. The reverse bending portion (120) is provided with a static contact point (1221). One end of the reverse bending portion (120) away from the straight portion (110) is provided with a connecting portion (1222). The straight portion (110) is provided with a first cavity (111); An arcing piece (200), the arcing piece (200) includes a mating portion (210) and an arcing guiding portion (220) connected in sequence. The mating portion (210) is connected to the connecting portion (1222). The arcing guiding portion (220) is located between the connecting portion (1222) and the straight portion (110). The positive projection of one end of the arcing guiding portion (220) away from the mating portion (210) on a preset plane is at least partially within the positive projection of the first cavity (111) on the preset plane. The preset plane is parallel to the straight portion (110).

2. The static contact assembly according to claim 1, wherein: The positive projection of one end of the arcing guiding portion (220) away from the mating portion (210) on the preset plane is within the positive projection of the first cavity (111) on the preset plane.

3. The static contact assembly according to claim 1, wherein: The reverse bending portion (120) has an opposite first side (123) and second side (124). The second side (124) is opposite to the straight portion (110). The connecting portion (1222) and the static contact point (1221) are both provided on the first side (123); and / or the positive projection of the arcing guiding portion (220) on the preset plane is within the positive projection of the first cavity (111) on the preset plane.

4. The static contact assembly according to claim 3, wherein: The connecting portion (1222) is a convex portion. The mating portion (210) is provided with a riveting hole (211). The riveting hole (211) is riveted to the convex portion.

5. The static contact assembly according to claim 3, wherein: The mating portion (210) includes a mating plate and two limiting plates. The two limiting plates are spaced along the width direction of the mating plate. The mating plate is connected to the connecting portion (1222). The mating plate is connected to the arcing guiding portion (220). The two limiting plates are respectively located on both sides of the reverse bending portion (120) in the width direction.

6. The static contact assembly according to claim 1, wherein: The arcing guiding portion (220) includes a first arcing guiding plate (221) and a second arcing guiding plate (222) connected at an angle in sequence. The first arcing guiding plate (221) extends towards the direction close to the straight portion (110). The first arcing guiding plate (221) is connected to the mating portion (210). The second arcing guiding plate (222) is located between the straight portion (110) and the connecting portion (1222) and forms an angle with the straight portion (110).

7. The static contact assembly according to claim 1, wherein: The static contact assembly further includes an insulating cover (300), the insulating cover (300) is provided with a second cavity (321), one side of the insulating cover (300) abuts against the side of the straight portion (110) close to the connecting portion (1222), the second cavity (321) is used for exposing the static contact point (1221) and the arc guide piece (200), and the end of the arc guide portion (220) away from the mating portion (210) is located in the second cavity (321).

8. The static contact assembly according to claim 7, wherein: The second cavity (321) includes a first cavity section (2211) and a second cavity section (2212) connected in sequence. The static contact point (1221) and the connecting portion (1222) are exposed in the first cavity section (2211), the end of the arc guide portion (220) away from the mating portion (210) is located in the second cavity section (2212), and an insulating wall (2213) protrudes from the inner wall of the second cavity section (2212) towards the first cavity (111), and the insulating wall (2213) is opposite to the inner wall of the first cavity (111).

9. The static contact assembly according to claim 7, wherein: The insulating cover (300) includes a first cover body (310) and a second cover body (320) connected in sequence. One side of the second cover body (320) abuts against the side of the straight portion (110) close to the connecting portion (1222), the second cover body (320) is provided with the second cavity (321), the first cover body (310) covers the reverse bending portion (120), and the static contact point (1221) is exposed outside the first cover body (310).

10. A circuit breaker, characterized in that, Including the static contact assembly according to any one of claims 1-9.

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