Circuit breaker

Abstract

The embodiment of the utility model provides a circuit breaker. The circuit breaker comprises a housing which comprises a first matching part; the static contact assembly is arranged in the shell; the moving contact assembly is arranged in the shell and can move relative to the static contact assembly so as to be switched between a switching-on state and a switching-off state, the moving contact assembly comprises a moving contact support and a second matching part arranged on the moving contact support, and when the moving contact assembly is in the switching-on state, the moving contact assembly can move relative to the static contact assembly so as to be switched between the switching-on state and the switching-off state. The first matching part is farther away from the static contact assembly than the second matching part, and under the condition that the second matching part moves to a position corresponding to the first matching part, the first matching part can be matched with the second matching part to hinder the movement of the moving contact assembly.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to the technical field of electrical equipment, and more particularly, to a circuit breaker. Background Art

[0002] In the event of an overcurrent or short circuit in the circuit breaker, the moving contact assembly moves away from the stationary contact assembly, and an arc is generated between the moving and stationary contact assemblies.

[0003] Due to the sharp increase in current between the moving and static contact assemblies, the electric repulsive force between the moving and static contact assemblies can cause the moving contact assembly to move away from the static contact assembly at a faster speed and acceleration. Then, the rebound force generated by the overtravel of the torsion spring of the mechanism or the reaction force of the moving contact assembly hitting the shell can cause the moving contact assembly to move toward the static contact assembly and even cause the arc to reignite. Utility Model Content

[0004] An object of the present disclosure is to provide a circuit breaker to at least partially solve the above problems.

[0005] In one aspect of the present disclosure, a circuit breaker is provided, which includes a housing, including a first mating portion; a static contact assembly, arranged in the housing; and a moving contact assembly, arranged in the housing and capable of moving relative to the static contact assembly to switch between a closed state and an open state, wherein the moving contact assembly includes a moving contact bracket and a second mating portion arranged on the moving contact bracket, wherein when the moving contact assembly is in the closed state, the first mating portion is farther away from the static contact assembly than the second mating portion, and wherein when the second mating portion moves to a position corresponding to the first mating portion, the first mating portion can cooperate with the second mating portion to hinder the movement of the moving contact assembly.

[0006] According to the embodiments of the present disclosure, the purpose of hindering the movement of the moving contact assembly is achieved through the cooperation between the first mating portion and the second mating portion, so that the time for the moving contact assembly to move toward the stationary contact assembly is prolonged due to the friction between the moving contact assembly and the first mating portion, or the moving contact assembly is limited by the first mating portion and cannot move toward the stationary contact assembly, so as to solve the problem of arc reignition.

[0007] In some embodiments, the first mating portion includes one of a mating groove and a mating protrusion, and the second mating portion includes the other of the mating groove and the mating protrusion.

[0008] In some embodiments, the housing includes a pair of shells, the pair of shells are connected to each other and form a receiving chamber, and the first mating portion, the stationary contact assembly, and the moving contact assembly are all located in the receiving chamber.

[0009] In some embodiments, the moving contact support includes a first surface and a second surface, the first surface faces one of the paired shells, and the second surface faces the other of the paired shells.

[0010] In some embodiments, the first mating portion is disposed on one of the pair of housings, and the second mating portion is disposed on a surface of the first surface and the second surface that faces the one housing.

[0011] In some embodiments, the first mating portions are arranged in pairs and are each arranged on a corresponding housing, and the second mating portions are arranged in pairs and are each arranged on the first surface and the second surface.

[0012] In some embodiments, one of the pair of second matching portions is disposed adjacent to a middle position of the first surface, and the other of the pair of second matching portions is disposed adjacent to a middle position of the second surface.

[0013] In some embodiments, the mating protrusion includes a base segment and a mating segment, one end of the base segment is disposed on the housing or the moving contact assembly, and the mating segment is disposed on the other end of the base segment and can be mated with the mating groove.

[0014] In some embodiments, when the second mating portion moves to a position corresponding to the first mating portion, an end of the mating segment facing away from the base segment is located in the mating groove to hinder movement of the moving contact assembly.

[0015] In some embodiments, a surface of the end of the mating segment facing away from the base segment comprises a spherical cap surface, and the mating groove comprises a spherical cap groove.

[0016] It should be understood that the content described in this section is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0018] Figure 1 A cross-sectional view of a circuit breaker according to some embodiments of the present disclosure is shown, wherein the moving contact assembly is in a closed state;

[0019] Figure 2shows a cross-sectional view of a circuit breaker according to some embodiments of the present disclosure;

[0020] Figure 3 Shows Figure 2 A cross-sectional view of the circuit breaker shown is taken along AA;

[0021] Figure 4 shows a cross-sectional view of a circuit breaker according to some embodiments of the present disclosure;

[0022] Figure 5 Shows Figure 4 A cross-sectional view of the circuit breaker shown is taken along line BB;

[0023] Figure 6 Shows Figure 5 The circuit breaker shown is a schematic structural diagram from another viewing angle;

[0024] Figure 7 A cross-sectional view of a circuit breaker according to some other embodiments of the present disclosure is shown, wherein the moving contact assembly is in a closed state.

[0025] Description of reference numerals:

[0026] 100 is a circuit breaker, 101 is a receiving chamber;

[0027] 1 is a housing, 11 is a shell, and 12 is a first matching portion;

[0028] 2 is a static contact assembly;

[0029] 3 is a moving contact assembly, 31 is a moving contact bracket, 311 is a first surface, 312 is a second surface, 313 is a third surface, and 32 is a second matching portion;

[0030] 41 is a matching groove, 42 is a matching protrusion, 421 is a base section, and 422 is a matching section. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0032] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects.

[0033] As described above, due to the sharp increase in current between the moving and stationary contact assemblies, the electromotive force between the moving and stationary contact assemblies can cause the moving contact assembly to move away from the stationary contact assembly at a faster speed and acceleration. Then, the rebound force generated by the overtravel of the torsion spring of the mechanism or the reaction force of the moving contact assembly hitting the shell can cause the moving contact assembly to move toward the stationary contact assembly, and even cause the arc to reignite. The embodiment of the present disclosure provides a circuit breaker 100 to at least partially solve the above problems. In the following, Figures 1 to 7 The principles of the present disclosure are described.

[0034] Figure 1 A cross-sectional view of a circuit breaker 100 according to some embodiments of the present disclosure is shown, wherein the moving contact assembly 3 is in a closed state. Figure 2 A cross-sectional view of a circuit breaker 100 according to some embodiments of the present disclosure is shown. Figure 3 Shows Figure 2 The circuit breaker 100 is shown in a cross-sectional view taken along AA. Figures 1 to 3 As shown, the circuit breaker 100 described herein generally comprises a housing 1, a stationary contact assembly 2 and a moving contact assembly 3. Both the stationary contact assembly 2 and the moving contact assembly 3 are disposed in the housing 1. The moving contact assembly 3 can move relative to the stationary contact assembly 2 to switch between a closed state and an open state.

[0035] refer to Figures 1 to 3 In some embodiments, the housing 1 includes a first mating portion 12. Correspondingly, the moving contact assembly 3 includes a moving contact support 31 and a second mating portion 32, wherein the second mating portion 32 is disposed on the moving contact support 31. Figure 1 , when the moving contact assembly 3 is in the closed state, the first matching portion 12 is further away from the stationary contact assembly 2 than the second matching portion 32. Thus, when the moving contact assembly 3 moves away from the stationary contact assembly 2, it is ensured that the second matching portion 32 can move to a position corresponding to the first matching portion 12. Obviously, when the second matching portion 32 moves to a position corresponding to the first matching portion 12, the first matching portion 12 can cooperate with the second matching portion 32 to hinder the movement of the moving contact assembly 3.

[0036] According to the embodiments of the present disclosure, the purpose of hindering the movement of the moving contact assembly 3 is achieved by the cooperation between the first matching portion 12 and the second matching portion 32, so that the time for the moving contact assembly 3 to move toward the static contact assembly 2 is prolonged due to the friction between the moving contact assembly 3 and the first matching portion 12, or the moving contact assembly 3 is limited by the first matching portion 12 and cannot move toward the static contact assembly 2, so as to solve the problem of arc reignition.

[0037] Figure 4 A cross-sectional view of a circuit breaker 100 according to some embodiments of the present disclosure is shown. Figure 5 Shows Figure 4 The circuit breaker 100 is shown in a cross-sectional view taken along line BB. Figure 6 Shows Figure 5 The circuit breaker 100 is shown in another perspective. Figures 4 to 6 As shown, when the second matching portion 32 moves to a position corresponding to the first matching portion 12, the first matching portion 12 and the second matching portion 32 can interfere with each other, for example, one of the first matching portion 12 and the second matching portion 32 can be located inside the other of the first matching portion 12 and the second matching portion 32. It can be understood that there is not only a blocking force but also a friction force between the first matching portion 12 and the second matching portion 32, which is more conducive to preventing the arc from reigniting.

[0038] refer to Figure 6 In some embodiments, the first mating portion 12 may include one of the mating groove 41 and the mating protrusion 42. Accordingly, the second mating portion 32 may include the other of the mating groove 41 and the mating protrusion 42. Thus, at least a portion of the mating protrusion 42 may be located inside the mating groove 41.

[0039] Return to reference Figures 1 to 6 In some embodiments, the housing 1 may include a pair of housings 11. The pair of housings 11 may be connected to each other to form a receiving chamber 101. The first mating portion 12, the stationary contact assembly 2, and the moving contact assembly 3 are respectively located in the receiving chamber 101. It should be noted that, Figures 1 to 6 The circuit breakers 100 shown in the figure are each without one of the paired housings 11 to better show the internal structure of the circuit breaker 100 .

[0040] Further, the moving contact support 31 may include a first surface 311 and a second surface 312. The first surface 311 may face one housing 11 of the paired housings 11, and the second surface 312 may face the other housing 11 of the paired housings 11.

[0041] In some embodiments, the first mating portion 12 is disposed on one of the paired housings 11, and the second mating portion 32 is disposed on a surface of the first surface 311 and the second surface 312 that faces one of the housings 11. Figures 5 and 6 In other embodiments, the first mating portions 12 may be provided in pairs, and each first mating portion 12 is provided on the corresponding housing 11. The second mating portions 32 may be provided in pairs, and each second mating portion 32 is provided on the first surface 311 and the second surface 312. It is understandable that, compared with the cooperation of one first mating portion 12 and one second mating portion 32, it is obvious that the cooperation of the paired first mating portions 12 and the paired second mating portions 32 can better hinder the movement of the moving contact assembly 3, which is more conducive to preventing the arc from reigniting.

[0042] Continue to refer Figures 5 and 6 In some embodiments, one of the paired second mating portions 32 is disposed adjacent to the middle position of the first surface 311, and the other of the paired second mating portions 32 is disposed adjacent to the middle position of the second surface 312. Thus, if the first mating portion 12 includes a mating protrusion 42, and the second mating portion 32 includes a mating groove 41, then during the movement of the moving contact assembly 3 toward the stationary contact assembly 2, if the mating protrusion 42 is disengaged from the mating groove 41, the mating protrusion 42 can continue to rub against the first surface 311 or the second surface 312, thereby further extending the time for the moving contact assembly 3 to move toward the stationary contact assembly 2, so as to solve the problem of arc reignition.

[0043] The mating protrusion 42 according to the embodiment of the present disclosure may include any structure, and the embodiment of the present disclosure is not limited to this. Figures 5 and 6 In some embodiments, the mating protrusion 42 may include a base section 421 and a mating section 422. One end of the base section 421 is disposed on the housing 1 or the moving contact assembly 3, and the base section 421 may be set to a larger size to increase the reliability of the mating protrusion 42. The mating section 422 may be disposed on the other end of the base section 421 and may be mated with the mating groove 41.

[0044] For further information, please refer to Figures 5 and 6 When the second mating portion 32 moves to a position corresponding to the first mating portion 12 , the end of the mating segment 422 that faces away from the base segment 421 may be located in the mating slot 41 to hinder the movement of the moving contact assembly 3 .

[0045] Continue to refer Figures 5 and 6In some embodiments, the surface of the end of the mating segment 422 away from the base segment 421 may include a spherical crown surface, and the mating groove 41 may include a spherical crown groove. Thus, the mating of the spherical crown surface and the spherical crown groove can avoid the jamming of the moving contact assembly 3 and the housing 1. The spherical crown surface refers to the curved surface left after the complete spherical surface is intercepted by a plane, and the spherical crown groove refers to the groove including the spherical crown surface.

[0046] It should be noted that in Figures 1 to 6 In the circuit breaker 100 shown, the first mating portion 12 includes a mating protrusion 42, and the second mating portion 32 includes a mating groove 41. The same is true for the first mating portion 12 including the mating groove 41 and the second mating portion 32 including the mating protrusion 42, which will not be described in detail here.

[0047] Figure 7 A cross-sectional view of a circuit breaker 100 according to some other embodiments of the present disclosure is shown, wherein the moving contact assembly 3 is in a closed state. Figure 7 The circuit breaker 100 shown is Figures 1 to 6 The circuit breaker 100 shown has a similar structure, and the difference mainly lies in the structure of the moving contact support 31 and the structure of the first matching portion 12 .

[0048] refer to Figure 7 In this embodiment, the moving contact support 31 includes a first surface 311 , a second surface 312 and a third surface 313 . The third surface 313 is connected to the first surface 311 and the second surface 312 respectively, and the third surface 313 is adjacent to the first matching portion 12 .

[0049] Continue to refer Figure 7 The second matching portion 32 may be a matching hole, and the matching hole may include an arc-shaped hole. The arc-shaped hole may penetrate the moving contact bracket 31. The arc-shaped hole may extend from the third surface 313 to the opposite surface of the third surface 313. Correspondingly, the first matching portion 12 may be a cylindrical protrusion.

[0050] According to the embodiments of the present disclosure, the friction between the wall of the arc-shaped hole and the outer surface of the cylindrical protrusion can also extend the time for the moving contact assembly 3 to move toward the stationary contact assembly 2, or the moving contact assembly 3 can be limited by the first mating portion 12 and cannot move toward the stationary contact assembly 2, so as to solve the problem of arc reignition.

[0051] Furthermore, when the moving contact assembly 3 is in the closed state, the opening of the arc-shaped hole adjacent to the first matching portion 12 may be in a trumpet shape, thereby facilitating the cylindrical protrusion to enter the arc-shaped hole.

[0052] The structural design according to the embodiment of the present disclosure can be applied to various circuit breakers 100 to at least partially solve the above problems. It should be understood that the structural design according to the embodiment of the present disclosure can also be applied to other electrical components, and the embodiment of the present disclosure is not limited to this.

[0053] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A circuit breaker (100), characterized in that: The circuit breaker (100) comprises: The housing (1) comprises a first matching portion (12); A stationary contact assembly (2) is arranged in the housing (1); and A moving contact assembly (3) is arranged in the housing (1) and is capable of moving relative to the stationary contact assembly (2) to switch between a closed state and an open state, wherein the moving contact assembly (3) comprises a moving contact support (31) and a second matching portion (32) arranged on the moving contact support (31). Wherein, when the moving contact assembly (3) is in the closed state, the first mating portion (12) is farther away from the stationary contact assembly (2) than the second mating portion (32), and wherein when the second mating portion (32) moves to a position corresponding to the first mating portion (12), the first mating portion (12) can cooperate with the second mating portion (32) to hinder the movement of the moving contact assembly (3).

2. The circuit breaker (100) according to claim 1, characterized in that: The first matching portion (12) includes one of a matching groove (41) and a matching protrusion (42), and the second matching portion (32) includes the other of the matching groove (41) and the matching protrusion (42).

3. The circuit breaker (100) according to claim 2, characterized in that: The housing (1) comprises a pair of shells (11), the pair of shells (11) are connected to each other and form a accommodating chamber (101), and the first matching portion (12), the static contact assembly (2) and the moving contact assembly (3) are all located in the accommodating chamber (101).

4. The circuit breaker (100) according to claim 3, characterized in that: The moving contact support (31) comprises a first surface (311) and a second surface (312), wherein the first surface (311) faces one shell (11) of the paired shells (11), and the second surface (312) faces the other shell (11) of the paired shells (11).

5. The circuit breaker (100) according to claim 4, characterized in that: The first matching portion (12) is arranged on one shell (11) of the pair of shells (11), and the second matching portion (32) is arranged on a surface of the first surface (311) and the second surface (312) facing the one shell (11).

6. The circuit breaker (100) according to claim 4, characterized in that: The first matching portions (12) are arranged in pairs and are each arranged on a corresponding housing (11); the second matching portions (32) are arranged in pairs and are each arranged on the first surface (311) and the second surface (312).

7. The circuit breaker (100) according to claim 6, characterized in that: One second matching portion (32) of the pair of second matching portions (32) is disposed adjacent to a middle position of the first surface (311), and the other second matching portion (32) of the pair of second matching portions (32) is disposed adjacent to a middle position of the second surface (312).

8. The circuit breaker (100) according to any one of claims 2 to 7, characterized in that: The mating protrusion (42) comprises a base section (421) and a mating section (422), wherein one end of the base section (421) is arranged on the housing (1) or the moving contact assembly (3), and the mating section (422) is arranged on the other end of the base section (421) and is capable of mating with the mating groove (41).

9. The circuit breaker (100) according to claim 8, characterized in that: When the second mating portion (32) moves to a position corresponding to the first mating portion (12), the end of the mating segment (422) facing away from the base segment (421) is located in the mating groove (41) to hinder the movement of the moving contact assembly (3).

10. The circuit breaker (100) according to claim 9, characterized in that: The surface of the end of the matching segment (422) facing away from the base segment (421) comprises a spherical cap surface, and the matching groove (41) comprises a spherical cap groove.

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