Circuit breaker

Abstract

The embodiment of the invention provides a circuit breaker. The circuit breaker comprises a static contact assembly; a moving contact assembly, wherein the moving contact assembly and the static contact assembly are correspondingly arranged; the transmission part comprises a rotating part, a rotating shaft and paired mounting parts arranged on the two sides of the rotating part, the rotating shaft penetrates through the rotating part and the paired mounting parts, and the moving contact assembly is arranged on the side, close to the static contact assembly, of each mounting part; and the handle connecting rod assembly is connected with the rotating part, and the size of the handle connecting rod assembly in the axial direction of the rotating shaft is smaller than that of the transmission piece in the axial direction of the rotating shaft.

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] A circuit breaker is a low-voltage electrical device used to connect and disconnect current and provide protection for lines and equipment in the event of overcurrent or short circuit. Circuit breakers can be divided into 2P circuit breakers, 3P circuit breakers, 4P circuit breakers, etc. according to the number of poles.

[0003] Due to the sensitivity of the energy storage cabinet to the width of the circuit breaker, the market demand for 2P circuit breakers is relatively high. The operating mechanism of a conventional 2P circuit breaker is located above one of the electrodes and is connected to the moving contact of this electrode via a transmission member. On the one hand, only one side of the circuit breaker can be used to install accessories, which cannot meet the need to install multiple accessories at the same time. On the other hand, when the circuit breaker is opened, the operating mechanism is rotated, and the moving contact of the electrode connected to the operating mechanism moves first, followed by the moving contact of the other electrode, resulting in an unbalanced opening of the contacts of the two electrodes, thereby affecting the DC consistency requirements. Summary of the invention

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

[0005] In a first aspect of the present disclosure, a circuit breaker is provided, which includes a static contact assembly; a moving contact assembly, wherein the moving contact assembly is arranged corresponding to the static contact assembly; a transmission member, wherein the transmission member includes a rotating portion, a rotating shaft, and a pair of mounting portions arranged on both sides of the rotating portion, the rotating shaft passes through the rotating portion and the paired mounting portions, and the moving contact assembly is arranged on one side of each mounting portion close to the static contact assembly; and a handle-link assembly, wherein the handle-link assembly is connected to the rotating portion, and the dimension of the handle-link assembly along the axial direction of the rotating shaft is smaller than the dimension of the transmission member along the axial direction of the rotating shaft.

[0006] In the circuit breaker according to the embodiment of the present disclosure, on the one hand, since the handle connecting rod assembly is connected to the rotating part at the middle position of the transmission member, and along the axial direction of the rotating shaft, the size of the handle connecting rod assembly is smaller than the size of the transmission member, therefore, there is a accommodating space on both sides of the handle connecting rod assembly, so that accessories can be installed at both sides of the circuit breaker, thereby meeting the requirement of installing multiple accessories at the same time. On the other hand, since the paired mounting parts are located on both sides of the rotating part, when the handle connecting rod assembly is rotated, the handle connecting rod assembly first drives the rotating part to rotate, and then the rotating part synchronously drives the two mounting parts to rotate, so that the contacts of the two electrodes are opened in a balanced manner, and finally the DC consistency requirement of the circuit breaker is met.

[0007] In some embodiments, the circuit breaker also includes a shell, a first shell surface of the shell is provided with a mounting hole, an end of the handle-link assembly away from the rotating part passes through the mounting hole, and the handle-link assembly can rotate along the mounting hole to switch the handle-link assembly between a closed state and an open state.

[0008] In some embodiments, a mounting groove for mounting accessories is disposed on the first shell surface, and the mounting groove is disposed on both sides of the mounting hole along the axial direction of the rotating shaft.

[0009] In some embodiments, an installation space is formed between the paired installation portions, the installation space is located on a side of the transmission member close to the static contact assembly, and the rotating portion is arranged in the installation space, wherein when the handle-link assembly is in a closed state, the distance between the side of the rotating portion close to the static contact assembly and the axis of the rotating shaft is smaller than the distance between the side of each of the installation portions close to the static contact assembly and the axis of the rotating shaft.

[0010] In some embodiments, the handle-link assembly includes a first link, a second link, and a link shaft, the first link and the second link are rotatably connected to the link shaft, and an end of the second link away from the link shaft is connected to the rotating part, wherein during the process of switching the handle-link assembly from an open state to a closed state, the link shaft moves toward the static contact assembly and drives the first link and the second link to expand, and the second link drives the rotating part to rotate.

[0011] In some embodiments, the second connecting rod includes a first rod body and a second rod body arranged opposite to each other, the rotating portion is clamped between the first rod body and the second rod body, and the rotating portion is rotatably connected to the first rod body and the second rod body through a first pin shaft.

[0012] In some embodiments, the handle-link assembly further includes a rotating arm and an elastic member, one end of the elastic member is connected to the rotating arm, and the other end of the elastic member is connected to the connecting rod shaft, wherein during the process of switching the handle-link assembly from the open state to the closed state, the rotating arm drives the elastic member to move, and the elastic member drives the connecting rod shaft to move toward the static contact assembly to expand the first connecting rod and the second connecting rod.

[0013] In some embodiments, the handle-link assembly further comprises a handle body, a limiting axis is provided at one end of the rotating arm away from the transmission member, a limiting groove corresponding to the limiting axis is provided on the handle body, and the limiting axis is provided in the limiting groove.

[0014] In some embodiments, the circuit breaker further includes a first bracket, the second connecting rod at least partially passes through the first bracket and is rotatably connected to the rotating portion, and an end of the first bracket away from the handle body is spaced apart from the transmission member.

[0015] In some embodiments, a spherical protrusion is provided at one end of the rotating arm close to the transmission member, and a spherical groove adapted to the spherical protrusion is provided on the first bracket, and the spherical protrusion is rotatably set in the spherical groove to enable the handle connecting rod assembly to switch between the open state and the closed state.

[0016] In some embodiments, the circuit breaker further includes a rocker arm, one end of which is rotatably connected to the first bracket, and the other end of which is rotatably connected to an end of the first connecting rod away from the second connecting rod via a second pin shaft.

[0017] 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

[0018] 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:

[0019] Figure 1 A partial structural schematic diagram of a circuit breaker according to some embodiments of the present disclosure is shown, wherein the circuit breaker is in a closed state and the housing is removed;

[0020] Figure 2 Shown according to Figure 1 The circuit breaker shown is a partial structural schematic diagram from another viewing angle, wherein the circuit breaker is in an open state, and the housing and a portion of the first bracket are removed;

[0021] Figure 3 Shown according to Figure 2 A cross-sectional view of a circuit breaker shown, wherein the circuit breaker is in a closed state;

[0022] Figure 4 A schematic structural diagram of a circuit breaker according to some embodiments of the present disclosure is shown;

[0023] Figure 5 A partial structural schematic diagram of a handle connecting rod assembly according to some embodiments of the present disclosure is shown;

[0024] Figure 6A schematic diagram showing the structure of a rotating arm and a portion of a first bracket according to some embodiments of the present disclosure is shown;

[0025] Figure 7 A working principle diagram of a circuit breaker according to some embodiments of the present disclosure is shown.

[0026] Description of reference numerals:

[0027] 100 is a circuit breaker, 101 is a receiving space;

[0028] 1 is a housing, 11 is a first housing surface, 111 is a mounting hole, and 112 is a mounting groove;

[0029] 2 is a static contact assembly, 21 is a static contact base, and 22 is a static contact point;

[0030] 3 is a moving contact assembly, 31 is a moving contact arm, and 32 is a moving contact point;

[0031] 4 is a transmission member, 41 is a rotating part, 42 is a mounting part, 43 is a rotating shaft, and 44 is a mounting space;

[0032] 5 is a handle connecting rod assembly, 51 is a first connecting rod, 511 is a second pin shaft hole, 52 is a second connecting rod, 521 is a first rod body, 522 is a second rod body, 523 is a first pin shaft hole, 53 is a connecting rod shaft, 54 is a rotating arm, 541 is a limiting shaft, 542 is a spherical protrusion, 55 is an elastic member, and 56 is a handle body;

[0033] 6 is the first bracket, 61 is the spherical groove; 7 is the rocker arm; 8 is the second bracket; 91 is the first pin shaft, and 92 is the second pin shaft. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] As described above, due to the sensitivity of the energy storage cabinet to the width of the circuit breaker 100, the market demand for 2P circuit breakers is relatively high. A conventional 2P circuit breaker is formed by cutting off one pole of a 3P circuit breaker. The operating mechanism of a conventional 2P circuit breaker is located above one of the electrodes and is connected to the moving contact of this electrode via a transmission member. On the one hand, only one side of the circuit breaker 100 can be used to install accessories, which cannot meet the need to install multiple accessories at the same time. On the other hand, when the circuit breaker 100 is opened, the operating mechanism is rotated, and the moving contact of the electrode connected to the operating mechanism moves first, and then the moving contact of the other electrode moves, resulting in an unbalanced opening of the contacts of the two electrodes, thereby affecting the DC consistency requirements.

[0037] In order to solve the above problems, a circuit breaker 100 is provided according to an embodiment of the present disclosure. On the one hand, the handle link assembly 5 of the circuit breaker 100 is connected to the rotating part 41 at the middle position of the transmission member 4, and along the axial direction of the rotating shaft 43, the size of the handle link assembly 5 is smaller than the size of the transmission member 4. Therefore, there are accommodating spaces 101 on both sides of the handle link assembly 5 so that accessories can be installed on both sides of the circuit breaker 100. The accessories include but are not limited to auxiliary contacts, alarm contacts, undervoltage coils and shunt coils. On the other hand, since the paired mounting parts 42 are located on both sides of the rotating part 41, when the handle link assembly 5 is rotated, the handle link assembly 5 first drives the rotating part 41 to rotate, and then the rotating part 41 synchronously drives the two mounting parts 42 to rotate, and the two mounting parts 42 respectively drive the two moving contact assemblies 3 to rotate, so that the contacts of the two electrodes are opened in a balanced manner, and finally the DC consistency requirements of the circuit breaker 100 are met. The following will be combined with Figures 1 to 7 Such a circuit breaker 100 will be described.

[0038] Figure 1 A partial structural schematic diagram of a circuit breaker 100 according to some embodiments of the present disclosure is shown, wherein the circuit breaker 100 is in a closed state and the housing 1 is removed; Figure 2 Shown according to Figure 1 The circuit breaker 100 is shown as a partial structural schematic diagram from another perspective, wherein the circuit breaker 100 is in an open state, and the housing 1 and a portion of the first bracket 6 are removed to more clearly show the internal structure of the circuit breaker 100. Figure 1 to Figure 2 As shown, the circuit breaker 100 described herein generally includes a housing 1, a stationary contact assembly 2, a moving contact assembly 3, a transmission member 4, a handle link assembly 5, a first bracket 6, a rocker arm 7 and a second bracket 8.

[0039] It should be noted that when the circuit breaker 100 is in the closed state, the handle connecting rod assembly 5, the transmission member 4 and the moving contact assembly 3 are also in the closed state. When the circuit breaker 100 is in the open state, the handle connecting rod assembly 5, the transmission member 4 and the moving contact assembly 3 are also in the open state.

[0040] like Figure 1 to Figure 2 As shown, in some embodiments, the number of the stationary contact assemblies 2 is two. The stationary contact assembly 2 includes a stationary contact base 21 and a stationary contact point 22 . The stationary contact point 22 is disposed on the stationary contact base 21 .

[0041] Continue as Figure 1 to Figure 2 As shown, in some embodiments, the moving contact assembly 3 is arranged corresponding to the stationary contact assembly 2. The moving contact assembly 3 includes a moving contact arm 31 and a moving contact 32, and the moving contact 32 is arranged on the side of the moving contact arm 31 facing the stationary contact 22. The moving contact assembly 3 can move toward the stationary contact assembly 2 to achieve the connection between the moving contact 32 and the stationary contact 22. When the moving contact assembly 3 moves in a direction away from the stationary contact assembly 2, the moving contact 32 can be separated from the stationary contact 22.

[0042] Back to Figure 1 As shown, in some embodiments, a moving contact assembly 3 is provided on one side of the transmission member 4 close to the stationary contact assembly 2. During the rotation of the transmission member 4, the moving contact assembly 3 is driven to move toward or away from the stationary contact assembly 2, so that the moving contact 32 is connected or separated from the stationary contact 22.

[0043] Continue as Figure 1 As shown, in some embodiments, the transmission member 4 includes a rotating portion 41 and a pair of mounting portions 42. The pair of mounting portions 42 are arranged on both sides of the rotating portion 41. The moving contact assembly 3 is arranged on one side of each mounting portion 42 close to the stationary contact assembly 2. The rotating portion 41 is driven, and the rotating portion 41 simultaneously drives the mounting portions 42 on both sides to rotate, so that the moving contact assembly 3 connected to the mounting portion 42 moves toward or away from the stationary contact 2 assembly at the same time. With the above configuration, the contacts of the two electrodes are connected or separated at the same time, meeting the DC consistency requirements of the circuit breaker 100.

[0044] In some embodiments, the rotating portion 41 and the mounting portion 42 can be detachably connected. In other embodiments, the rotating portion 41 can be fixedly connected to the mounting portion 42 or integrally formed with the mounting portion 42, which is not limited in the embodiments of the present disclosure.

[0045] In some embodiments, Figure 3 Shown according to Figure 2 FIG. 1 is a cross-sectional view of a circuit breaker 100, wherein the circuit breaker 100 is in a closed state. Figure 3As shown, in some embodiments, the transmission member 4 further includes a rotation shaft 43. The rotation shaft 43 passes through the rotating portion 41 and the paired mounting portions 42, and the rotating portion 41 and the paired mounting portions 42 can rotate around the rotation shaft 43.

[0046] Continue as Figures 1 to 3 As shown, in some embodiments, the first bracket 6 is used as a mounting carrier for the handle connecting rod assembly 5 in the circuit breaker 100. The second bracket 8 is used as a mounting carrier for the transmission member 4 in the circuit breaker 100. The rotating shaft 43 passes through the second bracket, so that the rotating portion 41 and the paired mounting portion 42 can rotate relative to the second bracket 8 around the rotating shaft 43, thereby realizing the rotation process of the transmission member 4. The first bracket 6 and the second bracket 8 are both connected to the base of the circuit breaker 100 to realize the reliable connection between the handle connecting rod assembly 5 and the transmission member 4 and the base of the circuit breaker 100.

[0047] In some embodiments, Figure 4 FIG. 1 is a schematic diagram showing the structure of a circuit breaker 100 according to some embodiments of the present disclosure. Figure 4 As shown, the stationary contact assembly 2, the moving contact assembly 3, the transmission member 4, the handle connecting rod assembly 5, the first bracket 6, the rocker arm 7 and the second bracket 8 are all arranged inside the housing 1. A mounting hole 111 is arranged on the first shell surface 11 of the housing 1 for passing the handle connecting rod assembly 5.

[0048] Continue as Figure 1 As shown, in some embodiments, one end of the handle link assembly 5 is connected to the rotating portion 41, and the end of the handle link assembly 5 away from the rotating portion 41 passes through the mounting hole 111 and can rotate along the mounting hole 111, so that the handle link assembly 5 switches between the closed state and the open state. During the rotation process, the handle link assembly 5 synchronously drives the transmission member 4 to rotate relative to the second bracket, so that the transmission member 4 can drive the moving contact assembly 3 to move toward or away from the static contact assembly 2, and finally connect or separate the moving contact 32 with the static contact 22.

[0049] In some embodiments, the size of the handle link assembly 5 along the axial direction of the rotation axis 43 is smaller than the size of the transmission member 4 along the axial direction of the rotation axis 43. Figure 1 and Figure 4 As shown, since the handle link assembly 5 is connected to the rotating part 41 at the middle position of the transmission member 4, and the size of the handle link assembly 5 is smaller than the size of the transmission member 4 along the axial direction of the rotating shaft 43, there are accommodating spaces 101 on both sides of the handle link assembly 5 so that accessories can be installed on both sides of the circuit breaker 100.

[0050] More specifically, Figure 5 FIG. 5 shows a partial structural schematic diagram of a handle connecting rod assembly 5 according to some embodiments of the present disclosure. Figures 1 to 5As shown, the first shell surface 11 is provided with a mounting groove 112 for mounting accessories. Along the axial direction of the rotating shaft 43, the mounting groove 112 is provided on both sides of the mounting hole 111. That is, since the two sides of the handle link assembly 5 and the housing 1 form a receiving space 101, the mounting groove 112 for mounting accessories can be provided on the first shell surface 11, so that accessories can be installed at both sides of the circuit breaker 100, thereby meeting the requirement of installing multiple accessories at the same time.

[0051] Continue as Figure 5 As shown, in some embodiments, the number of mounting slots 112 is four. The four mounting slots 112 are symmetrically arranged on both sides of the mounting hole 111. In other embodiments, the number of mounting slots 112 can also be two. The two mounting slots 112 are symmetrically arranged on both sides of the mounting hole 111. The embodiments of the present disclosure are not limited to this.

[0052] Combination Figure 2 , Figure 3 as well as Figure 5 As shown, in some embodiments, the handle link assembly 5 described herein generally includes a first link 51, a second link 52, a link shaft 53, a rotating arm 54, an elastic member 55, and a handle body 56. Specifically, the first link 51 and the second link 52 are rotatably connected to the link shaft 53, and one end of the second link 52 away from the link shaft 53 is connected to the rotating portion 41. It can be understood that in the process of switching the handle link assembly 5 from the open state to the closed state, the link shaft 43 moves toward the static contact assembly 2 and drives the first link 51 and the second link 52 to unfold, so that the second link 52 drives the rotating portion 41 to rotate, thereby realizing that the handle link assembly 5 drives the transmission member 4 to rotate.

[0053] Back to Figure 1 and Figure 3As shown, a mounting space 44 is formed between the paired mounting portions 42, and the mounting space 44 is located on the side of the transmission member 4 close to the stationary contact assembly 2. The rotating portion 41 is arranged in the mounting space 44, wherein when the handle connecting rod assembly 5 is in the closed state, the distance between the side of the rotating portion 41 close to the stationary contact assembly 2 and the axis of the rotating shaft 43 is smaller than the distance between the side of each mounting portion 42 close to the stationary contact assembly 2 and the axis of the rotating shaft 43. With the above configuration, since the distance between the side of the rotating portion 41 close to the stationary contact assembly 2 and the axis of the rotating shaft 43 is shorter, and the second connecting rod 52 is connected to the side of the rotating portion 41 close to the stationary contact assembly 2, the distance between the second connecting rod 52 and the axis of the rotating shaft 43 is also shorter. It can be understood that when the second connecting rod 42 drives the rotating part 41 to rotate a certain angle, although the rotation angle of the mounting part 42 is the same as the rotation angle of the rotating part 41, the rotation distance of the mounting part 42 is greater than the rotation distance of the rotating part 41, which ultimately increases the movement distance of the moving contact assembly 3 during the closing process.

[0054] Return to Figure 2 As shown, when the handle connecting rod assembly 5 is in the open state, the first connecting rod 51 and the second connecting rod 52 are arranged at an angle, and the acute angle formed by the first connecting rod 51 and the second connecting rod 52 faces the stationary contact assembly 2. Figure 3 As shown, when the handle connecting rod assembly 5 is in the closed state, the first connecting rod 51 and the second connecting rod 52 are unfolded. In this case, the first connecting rod 51 and the second connecting rod 52 are approximately stretched into a straight line.

[0055] Continue as Figures 2 to 3 As shown, the second connecting rod 52 at least partially passes through the first bracket 6 and is rotatably connected to the rotating part 41. The first connecting rod 51, the connecting rod shaft 53 and the elastic member 55 are all located inside the first bracket 6. The length of the second connecting rod 52 is relatively long, so that the end of the first bracket 6 away from the handle body 56 is spaced apart from the transmission member 4. With the above configuration, during the rotation of the handle connecting rod assembly 5, the first bracket 6 and the transmission member 4 will not interfere with each other, so there is no need to increase the axial dimension of the transmission member 4 along the rotating shaft 43, and finally the width of the circuit breaker 100 does not need to be changed.

[0056] Continue back to Figure 2 As shown, in some embodiments, the rocker arm 7 is rotatably connected to the first bracket 6. The end of the first connecting rod 51 away from the second connecting rod 52 is provided with a second pin shaft hole 511. The second pin shaft 92 is installed in the second pin shaft hole 511 of the first connecting rod 51 and on the rocker arm 7. That is, one end of the rocker arm 7 is rotatably connected to the first bracket 6, and the other end of the rocker arm 7 is rotatably connected to the end of the first connecting rod 51 away from the second connecting rod 52 through the second pin shaft 92.

[0057] It should be noted that, although the rocker arm 7 is rotatably connected to the first bracket 6, the rocker arm 7 does not rotate relative to the first bracket 6 during the closing process of the circuit breaker 100. In other words, the rocker arm 7 and the first bracket 6 are relatively fixed. Therefore, during the closing process of the circuit breaker 100, the connecting rod shaft 53 rotates along the second pin shaft 92 with the length of the first connecting rod 51 as the radius.

[0058] Back to Figure 5 As shown, in some embodiments, the second connecting rod 52 includes a first rod body 521 and a second rod body 522. The first rod body 521 and the second rod body 522 are arranged opposite to each other. The rotating portion 41 is clamped between the first rod body 521 and the second rod body 522. The first rod body 521 and the second rod body 522 are both provided with a first pin shaft hole 523, and the rotating portion 41 is rotatably connected with the first rod body 521 and the second rod body 522 through a first pin shaft 91. Since the rotating portion 41 is clamped between the second connecting rod 52, the second connecting rod 52 can drive the rotating portion 41 to rotate more smoothly. In other embodiments, the second connecting rod 52 can also include only the first rod body 521, and the rotating portion 41 is rotatably connected with the first rod body 521 through the first pin shaft 91, and the embodiments of the present disclosure are not limited to this.

[0059] Continue as Figure 5 As shown, a limiting shaft 541 is provided at one end of the rotating arm 54 away from the transmission member 4, and a limiting groove (not shown in the figure) corresponding to the limiting shaft 541 is provided on the handle body 56, and the limiting shaft 541 is arranged in the limiting groove. With the above configuration, on the one hand, rotating the handle body 56 can drive the rotating arm 54 to rotate. On the other hand, when the handle body 56 needs to be removed from the rotating arm 54, the limiting member 541 can be disengaged from the limiting groove, so that the handle body 56 and the rotating arm 54 can be separated conveniently and quickly.

[0060] Continue as Figure 2 and Figure 5 As shown, one end of the elastic member 55 is connected to the rotating arm 54, and the other end of the elastic member 55 is connected to the connecting rod shaft 53. In the process of switching the handle connecting rod assembly 5 from the opening state to the closing state, the handle body 56 drives the rotating arm 54 to rotate, and the rotating arm 54 drives the elastic member 55 to move and stretch the elastic member 55. The elastic member 55 drives the connecting rod shaft 53 to rotate toward the fixed contact assembly 2 with the length of the first connecting rod 51 as the radius, so that the first connecting rod 51 and the second connecting rod 52 are unfolded.

[0061] The elastic member 55 according to the embodiment of the present disclosure may be any type of elastic member 55 currently known or available in the future, and the embodiment of the present disclosure is not limited thereto. For example, in some embodiments, the elastic member 55 may be a spring. The spring can store energy in an extended state and release energy in a shortened state to drive the connecting shaft 53 to rotate around the second pin 92.

[0062] Figure 6 FIG. 5 shows a schematic diagram of the structure of the rotating arm 54 and a portion of the first bracket 6 according to some embodiments of the present disclosure. Figure 6 As shown, a spherical protrusion 542 is provided at one end of the rotating arm 54 close to the transmission member 4. A spherical groove 61 matching the spherical protrusion 542 is provided on the first bracket 6, and the spherical protrusion 542 is arranged in the spherical groove 61. With the above configuration, the handle body 56 is rotated, and the handle body 56 can drive the rotating arm 54 to rotate relative to the first bracket 6, so that the handle connecting rod assembly 5 can switch between the closing state and the opening state.

[0063] Figure 7 FIG. 1 shows a working principle diagram of a circuit breaker 100 according to some embodiments of the present disclosure. Figure 7 As shown, pressing the handle body 56 causes the rotating arm 54 to rotate in the closing direction, and the rotating arm 54 causes the elastic member 55 to be stretched during the movement. When the handle connecting rod assembly 5 moves to a certain moment, the elastic member 55 is stretched and the energy storage is completed. After the handle connecting rod assembly 5 passes this moment, there is no need to continue pressing the handle body 56. Since the elastic member 55 actively releases energy, the elastic member 55 drives the rotating arm 54 to rotate in the closing direction, and drives the connecting rod shaft 53 to rotate around the second pin shaft 92 with the length of the first connecting rod 51 as the radius. The first connecting rod 51 and the second connecting rod 52 are unfolded and stretched approximately into a straight line. The second connecting rod 52 drives the transmission member 4 to rotate relative to the second bracket 8, thereby driving the moving contact assembly 3 to move toward the static contact assembly 2 until the moving contact 32 contacts the static contact 22, completing the closing.

[0064] Back to Figure 5 As shown, during the closing process, the connecting rod shaft 53 needs to be smoothly disengaged from the rotating arm 54, so the projections of the connecting rod shaft 53 and the rotating arm 54 do not overlap in the direction perpendicular to the axial direction of the connecting rod shaft 53. In other words, there is a gap between the end of the connecting rod shaft 53 facing the rotating arm 54 and the rotating arm 54, so that no mutual interference occurs. With the above configuration, when the handle connecting rod assembly 5 is switched from the opening state to the closing state, the rotating arm 54 cannot interfere with the movement of the connecting rod shaft 53.

[0065] 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: Stationary contact assembly (2); A moving contact assembly (3), wherein the moving contact assembly (3) is arranged corresponding to the stationary contact assembly (2); A transmission member (4), the transmission member (4) comprising a rotating portion (41), a rotating shaft (43), and a pair of mounting portions (42) arranged on both sides of the rotating portion (41), the rotating shaft (43) passing through the rotating portion (41) and the pair of mounting portions (42), and the moving contact assembly (3) is arranged on one side of each mounting portion (42) close to the stationary contact assembly (2); and A handle connecting rod assembly (5), wherein the handle connecting rod assembly (5) is connected to the rotating part (41), and the size of the handle connecting rod assembly (5) along the axial direction of the rotating shaft (43) is smaller than the size of the transmission member (4) along the axial direction of the rotating shaft (43).

2. The circuit breaker (100) according to claim 1, characterized in that: The circuit breaker (100) further comprises a housing (1), a first shell surface (11) of the housing (1) being provided with a mounting hole (111), an end of the handle connecting rod assembly (5) away from the rotating portion (41) passing through the mounting hole (111), and the handle connecting rod assembly (5) being capable of rotating along the mounting hole (111) so that the handle connecting rod assembly (5) can be switched between a closed state and an open state.

3. The circuit breaker (100) according to claim 2, characterized in that: The first shell surface (11) is provided with a mounting groove (112) for mounting accessories, and along the axial direction of the rotating shaft (43), the mounting groove (112) is arranged on both sides of the mounting hole (111).

4. The circuit breaker (100) according to claim 1, characterized in that: An installation space (44) is formed between the paired installation portions (42), and the installation space (44) is located on a side of the transmission member (4) close to the stationary contact assembly (2). The rotating portion (41) is arranged in the installation space (44), wherein when the handle connecting rod assembly (5) is in a closed state, the distance between the side of the rotating portion (41) close to the stationary contact assembly (2) and the axis of the rotating shaft (43) is smaller than the distance between the side of each installation portion (42) close to the stationary contact assembly (2) and the axis of the rotating shaft (43).

5. The circuit breaker (100) according to claim 1, characterized in that: The handle link assembly (5) comprises a first link (51), a second link (52) and a link shaft (53), wherein the first link (51) and the second link (52) are rotatably connected to the link shaft (53), and an end of the second link (52) away from the link shaft (53) is connected to the rotating part (41), wherein when the handle link assembly (5) switches from an open state to a closed state, the link shaft (53) moves toward the stationary contact assembly (2) and drives the first link (51) and the second link (52) to unfold, and the second link (52) drives the rotating part (41) to rotate.

6. The circuit breaker (100) according to claim 5, characterized in that: The second connecting rod (52) comprises a first rod body (521) and a second rod body (522) which are arranged opposite to each other, the rotating portion (41) is clamped between the first rod body (521) and the second rod body (522), and the rotating portion (41) is rotatably connected to the first rod body (521) and the second rod body (522) via a first pin shaft (91).

7. The circuit breaker (100) according to claim 5, characterized in that: The handle connecting rod assembly (5) further comprises a rotating arm (54) and an elastic member (55), one end of the elastic member (55) being connected to the rotating arm (54), and the other end of the elastic member (55) being connected to the connecting rod shaft (53), wherein during the process of the handle connecting rod assembly (5) switching from the opening state to the closing state, the rotating arm (54) drives the elastic member (55) to move, and the elastic member (55) drives the connecting rod shaft (53) to move toward the stationary contact assembly (2), so that the first connecting rod (51) and the second connecting rod (52) are unfolded.

8. The circuit breaker (100) according to claim 7, characterized in that: The handle connecting rod assembly (5) also includes a handle body (56); a limit axis (541) is provided at one end of the rotating arm (54) away from the transmission member (4); a limit groove corresponding to the limit axis (541) is provided on the handle body (56); and the limit axis (541) is arranged in the limit groove.

9. The circuit breaker (100) according to claim 8, characterized in that: The circuit breaker (100) further comprises a first bracket (6), the second connecting rod (52) at least partially passing through the first bracket (6) and being rotatably connected to the rotating portion (41), and an end of the first bracket (6) away from the handle body (56) being spaced apart from the transmission member (4).

10. The circuit breaker (100) according to claim 9, characterized in that: A spherical protrusion (542) is provided at one end of the rotating arm (54) close to the transmission member (4), and a spherical groove (61) matched with the spherical protrusion (542) is provided on the first bracket (6), and the spherical protrusion (542) is rotatably arranged in the spherical groove (61) to realize the switching of the handle connecting rod assembly (5) between the open state and the closed state.

11. The circuit breaker (100) according to claim 9, characterized in that: The circuit breaker (100) further comprises a rocker arm (7), one end of which is rotatably connected to the first bracket (6), and the other end of which is rotatably connected to an end of the first connecting rod (51) away from the second connecting rod (52) via a second pin shaft (92).

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