1P+N Circuit Breaker and Electrical Equipment Equipped with Such a Circuit Breaker

Abstract

The present invention provides a 1P+N circuit breaker and an electrical device equipped with the circuit breaker. The circuit breaker includes a housing and an L-pole assembly and an N-pole assembly installed in the housing. Among them, when closing the 1P+N circuit breaker, a buffer member in the L-pole assembly cooperates with a first protrusion on the first handle mechanism and a blocking portion on the first moving contact to delay the contact between the first moving contact and the first static contact, so that the second contact mechanism in the N-pole assembly closes prior to the first contact mechanism in the L-pole assembly. Moreover, when opening the 1P+N circuit breaker, the first tripping mechanism cooperates with the second tripping mechanism to cause the first contact mechanism in the L-pole assembly to open prior to the second contact mechanism in the N-pole assembly. Therefore, the second contact mechanism in the N-pole assembly will not be damaged due to the arc generated when the 1P+N circuit breaker is opened or closed, thus ensuring that the electrical device can operate safely and reliably.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and particularly to a 1P+N circuit breaker and an electrical device equipped with the 1P+N circuit breaker. Background Art

[0002] The 1P+N circuit breaker connects the phase line (usually represented by the L pole) and the neutral line (usually represented by the N pole) into the 1P+N circuit breaker, so that it has protection functions such as overload, open circuit, and short circuit.

[0003] In the existing 1P+N circuit breaker, the L pole has breaking capacity and protection functions such as overload, short circuit, and open circuit, while the N pole only has breaking capacity and does not have protection functions. Therefore, the arc generated when the 1P+N circuit breaker is disconnected or closed easily damages the contact mechanism of the N pole.

[0004] To solve the above problems, the present invention provides a 1P+N circuit breaker that can avoid damage to the contact mechanism of the N pole and an electrical device equipped with the 1P+N circuit breaker. Summary of the Invention

[0005] In view of the above problems, the first aspect of the present invention provides a 1P+N circuit breaker, so that the arc generated when the circuit breaker is disconnected or closed will not damage the contact mechanism of the N pole.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a 1P+N circuit breaker, including:

[0008] A housing having a cavity;

[0009] An L pole assembly installed in the cavity, and the L pole assembly includes:

[0010] A first handle mechanism provided with a first protrusion;

[0011] A first contact mechanism including a first moving contact and a first static contact, and a blocking portion is provided on the first moving contact;

[0012] A first moving mechanism connected between the first handle mechanism and the first moving contact, and the first handle mechanism drives the first moving contact to close with the first static contact through the first moving mechanism;

[0013] A buffer member installed between the first handle mechanism and the first moving contact. When closing the 1P+N circuit breaker, the buffer member cooperates with the first protrusion on the first handle mechanism and the blocking portion on the first moving contact to delay the contact between the first moving contact and the first static contact;

[0014] The first tripping mechanism includes a first latch and a first linkage shaft, and the first latch has a first through hole;

[0015] The magnetic tripping mechanism is close to the first tripping mechanism;

[0016] The arc extinguishing chamber is close to the first contact mechanism;

[0017] The N - pole assembly is installed in the cavity, and the N - pole assembly includes:

[0018] The second handle mechanism is connected to the first handle mechanism to move synchronously;

[0019] The second contact mechanism, the second contact mechanism includes a second moving contact and a second static contact;

[0020] The second moving mechanism is connected between the second handle mechanism and the second moving contact, and the second handle mechanism drives the second moving contact to close with the second static contact through the second moving mechanism;

[0021] The second tripping mechanism includes a second latch, the second latch has a second through hole, and the first linkage shaft is inserted into the first through hole in the first latch and the second through hole in the second latch to connect the first latch and the second latch; the diameter of the first through hole is smaller than the diameter of the second through hole and is the same as the diameter of the first linkage shaft. When disconnecting the 1P + N circuit breaker, the first tripping mechanism and the second tripping mechanism cooperate to make the disconnection of the first moving contact and the first static contact prior to the disconnection of the second moving contact and the second static contact.

[0022] In an alternative embodiment, the first handle mechanism includes a first handle body and a first intermediate shaft installed in the first handle body, and the first protrusion is provided at one end of the first intermediate shaft;

[0023] The second handle mechanism includes a second handle body, a second intermediate shaft installed in the second handle body, and a linkage rod. One end of the second intermediate shaft is connected to the other end of the first intermediate shaft through the linkage rod.

[0024] In an alternative embodiment, the first moving mechanism includes a first transmission member and a first pushing member. One end of the first transmission member is connected to the first handle mechanism, the other end of the first transmission member is connected to one end of the first pushing member, and the other end of the first pushing member contacts the first moving contact to drive the first moving contact to close with the first static contact.

[0025] In an alternative embodiment, the first movable mechanism and the second movable mechanism have the same constitution.

[0026] In an alternative embodiment, the buffer member has a first contact portion and a second contact portion, and at least one bending portion is formed between the first contact portion and the second contact portion of the buffer member.

[0027] In an alternative embodiment, the 1P+N circuit breaker further includes:

[0028] An isolating member, which is installed in the housing and divides the cavity of the housing into a first chamber and a second chamber;

[0029] A control device, installed in the first chamber;

[0030] An electric operating mechanism, installed in the second chamber;

[0031] Both the L-pole assembly and the N-pole assembly are installed in the second chamber. The second tripping mechanism further includes a second trip and a second linkage shaft, and the second trip is linked with the second lock through the second linkage shaft;

[0032] Wherein, the electric operating mechanism is respectively connected with the control device and the second handle mechanism, and the control device drives the second handle mechanism through the electric operating mechanism to close the 1P+N circuit breaker and drives the second tripping mechanism to open the 1P+N circuit breaker.

[0033] In an alternative embodiment, the first handle mechanism includes a first handle body and a first intermediate shaft installed in the first handle body, and the first protrusion is arranged at one end of the first intermediate shaft;

[0034] The second handle mechanism includes a second handle body, a second intermediate shaft installed in the second handle body, a gear and a linkage rod installed on the second intermediate shaft. One end of the second intermediate shaft is connected with the other end of the first intermediate shaft through the linkage rod.

[0035] In an alternative embodiment, the electric operating mechanism includes a driving member and a gear assembly;

[0036] The gear assembly includes a first double gear, a second double gear, a third double gear and a fourth double gear. The output end of the driving member is connected to the large gear of the first double gear. The small gear of the first double gear meshes with the large gear of the second double gear. The small gear of the second double gear meshes with the large gear of the third double gear. The small gear of the third double gear meshes with the large gear of the fourth double gear. The small gear of the fourth double gear meshes with the gear on the second intermediate shaft;

[0037] A second protrusion is provided on the small gear of the fourth double gear for triggering the second tripping mechanism to disconnect the 1P+N circuit breaker.

[0038] In an optional implementation, a feedback signal interface is installed on the control device, and the feedback signal interface is used for plugging in a feedback signal terminal.

[0039] The second aspect of the present invention provides an electrical device, and the electrical device is installed with the 1P+N circuit breaker as described above, thereby ensuring that the electrical device can operate safely and reliably.

[0040] For the 1P+N circuit breaker provided by the embodiment of the present invention, a buffer is installed between the first handle mechanism and the first moving contact. When closing the 1P+N circuit breaker, the buffer cooperates with the first protrusion on the first handle mechanism and the blocking portion on the first moving contact to delay the contact between the first moving contact and the first static contact, so that the contact between the second moving contact and the second static contact precedes the contact between the first moving contact and the second static contact; moreover, when disconnecting the 1P+N circuit breaker, the first tripping mechanism and the second tripping mechanism cooperate to disconnect the first moving contact and the first static contact before the second moving contact and the second static contact. Based on the fact that the second contact mechanism in the N-pole assembly closes before the first contact mechanism in the L-pole assembly and the first contact mechanism in the L-pole assembly disconnects before the second contact mechanism in the N-pole assembly, the second contact mechanism in the N-pole assembly will not be damaged due to the arc generated when the 1P+N circuit breaker is disconnected or closed.

[0041] In addition to the technical problems solved by the present invention, the technical features constituting the technical solution, and the beneficial effects brought by these technical features of the technical solution described above, the other technical problems that the 1P+N circuit breaker provided by the present invention can solve, the other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Description of the Drawings

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0043] Figure 1 Structural schematic diagram of the 1P+N circuit breaker provided in Embodiment 1 of the present invention;

[0044] Figure 2 Structural schematic diagram of the L-pole assembly provided in Embodiment 1 of the present invention;

[0045] Figure 3 Structural schematic diagram of the L-pole closing provided in Embodiment 1 of the present invention;

[0046] Figure 4 Structural schematic diagram of the L-pole opening provided in Embodiment 1 of the present invention;

[0047] Figure 5 Structural schematic diagram of the N-pole assembly provided in Embodiment 1 of the present invention;

[0048] Figure 6 Structural schematic diagram of the connection between the first tripping mechanism and the second tripping mechanism provided in Embodiment 1 of the present invention;

[0049] Figure 7 Structural schematic diagram of the 1P+N circuit breaker provided in Embodiment 2 of the present invention;

[0050] Figure 8 Structural schematic diagram of the connection between the N-pole assembly and the electric operating mechanism provided in Embodiment 2 of the present invention;

[0051] Figure 9 Structural schematic diagram of the electric operating mechanism provided in Embodiment 2 of the present invention;

[0052] Figure 10 Structural schematic diagram of the connection between the second tripping mechanism and the fourth double gear provided in Embodiment 2 of the present invention;

[0053] Explanation of reference numerals:

[0054] 10 - housing; 11 - first housing; 12 - second housing; 13 - spacer;

[0055] 20 - L - pole assembly; 21 - first handle mechanism; 211 - first protrusion; 212 - first handle body; 213 - first intermediate shaft; 22 - first contact mechanism; 221 - first moving contact; 2211 - blocking part; 222 - first static contact; 23 - first moving mechanism; 231 - first transmission part; 232 - first pushing part; 24 - buffer part; 241 - first contact part; 242 - first bending part; 243 - second bending part; 244 - second contact part; 25 - first tripping mechanism; 251 - first latch; 2511 - first through - hole; 2512 - first triggering part; 252 - first linkage shaft; 26 - magnetic tripping mechanism; 27 - arc - quenching chamber;

[0056] 30 - N - pole assembly; 31 - second handle mechanism; 311 - second handle body; 312 - second intermediate shaft; 313 - gear; 32 - second contact mechanism; 321 - second moving contact; 322 - second static contact; 33 - second moving mechanism; 331 - second transmission part; 332 - second pushing part; 34 - second tripping mechanism; 341 - second latch; 3411 - second through - hole; 3412 - second triggering part; 342 - second trip; 343 - second linkage shaft;

[0057] 40 - electric operating mechanism; 41 - driving part; 42 - gear assembly; 421 - first double - gear; 422 - second double - gear; 423 - third double - gear; 424 - fourth double - gear; 4241 - second protrusion;

[0058] 50 - control device; 51 - feedback signal interface. Specific embodiments

[0059] The 1P + N circuit breaker connects the phase wire (usually represented by the L - pole) and the neutral wire (usually represented by the N - pole) into the 1P + N circuit breaker, enabling it to have protection functions such as overload, open - circuit, and short - circuit protection. In the existing 1P + N circuit breaker, the L - pole has breaking capacity and protection functions such as overload, short - circuit, and open - circuit protection, while the N - pole only has breaking capacity and no protection function. Therefore, the arc generated when the 1P + N circuit breaker is disconnected or closed is likely to damage the contact mechanism of the N - pole.

[0060] To solve the above problems, an embodiment of the present invention provides a 1P+N circuit breaker. By installing a buffer between the first handle mechanism and the first moving contact, when closing the above 1P+N circuit breaker, the buffer cooperates with the first protrusion on the first handle mechanism and the blocking portion on the first moving contact to delay the contact between the first moving contact and the first static contact, so that the contact between the second moving contact and the second static contact precedes the contact between the first moving contact and the second static contact; moreover, when disconnecting the 1P+N circuit breaker, the first tripping mechanism and the second tripping mechanism cooperate to disconnect the first moving contact and the first static contact before the second moving contact and the second static contact. Based on the fact that the second contact mechanism in the N-pole assembly closes before the first contact mechanism in the L-pole assembly and the first contact mechanism in the L-pole assembly disconnects before the second contact mechanism in the N-pole assembly, the second contact mechanism in the N-pole assembly will not be damaged due to the arc generated when the 1P+N circuit breaker is disconnected or closed.

[0061] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0062] Embodiment 1

[0063] As Figure 1 shown, the 1P+N circuit breaker provided in Embodiment 1 of the present application includes: a housing 10, an L-pole assembly 20, and an N-pole assembly 30.

[0064] In this embodiment, as Figure 1 shown, the housing 10 is generally in a box shape and includes a first housing 11 and a second housing 12 made of plastic material and formed by an injection molding process. By connecting the two, a cavity for accommodating the L-pole assembly 20 and the N-pole assembly 30 can be formed. The connection method between the first housing 11 and the second housing 12 can be a connection method well known to those skilled in the art. Exemplarily, the above connection method can be, but is not limited to, a threaded connection and a riveting connection.

[0065] In an alternative embodiment, the connection between the first housing 11 and the second housing 12 is a riveting connection. Specifically, the second housing 12 is provided with an upward protruding columnar structure, and the first housing 11 is provided with a hole matching the columnar structure. The columnar structure on the second housing 12 passes through the hole of the first housing 11, and the first housing 11 and the second housing 12 are riveted and fixed through a riveting process such as blind riveting or press riveting, realizing the connection between the first housing 11 and the second housing 12.

[0066] AsFigure 2 As shown in the figure, the L-pole assembly 10 includes: a first handle mechanism 21, a first contact mechanism 22, a first moving mechanism 23, a buffer member 24, a first tripping mechanism 25, a magnetic tripping mechanism 26, and an arc extinguishing chamber 27.

[0067] Among them, as Figure 3 shown, the first handle mechanism 21 includes a first handle body 212 and a first intermediate shaft 213 installed inside the first handle body 212, and a first protrusion 211 is provided at one end of the first intermediate shaft 231. During the closing process of the first handle body 212, the first protrusion 211 contacts the first contact portion 241 of the buffer member 24, and the second contact portion 244 of the buffer member 24 abuts against the first contact mechanism 22. Further, the first protrusion 211 can squeeze the first contact portion 241. Under the action of the squeezing force, the first contact portion 241 of the buffer member 24 may bend and deform to form a restoring force, and during the bending deformation process of the first contact portion 241, the closing of the contacts in the L-pole assembly 20 can be delayed. However, after the first protrusion 211 contacts the first contact portion 241 for about 3 - 5 milliseconds, the two will separate, and the first handle body 212 continues to drive the contacts in the L-pole assembly 20 to close, while the first contact portion 241 of the buffer member 24 returns to its original shape under the action of the restoring force.

[0068] As Figure 2 shown in 3 and Figure 4, the first contact mechanism 22 includes a first moving contact 221 and a first static contact 222, and a blocking portion 2211 is provided on the first moving contact 221. During the closing process of the first handle body 212, the blocking portion 2211 contacts the second contact portion 244 of the buffer member 24 and cooperates with the first protrusion 211 and the first contact portion 241 of the buffer member 24 to delay the closing of the first moving contact 221 and the first static contact 222.

[0069] As an optional implementation manner, the first moving contact 221 may include a buckle, a contact, and a spring. Among them, the buckle is located below the contact and is connected to the first moving mechanism 23, and an installation hole and an installation portion are provided on the buckle. The contact is fixed to the buckle by screws passing through one end of the contact and the installation hole in sequence. The above-mentioned blocking portion 2211 is provided on the contact, and one end of the spring is installed on the installation portion of the buckle, and the other end is fixed to the housing. When closing the circuit breaker, an external force drives the buckle to drive the contact to contact the first static contact 222. At this time, the spring also moves and elongates together; when opening the circuit breaker, when the external force gradually decreases, the spring will return to its original position, thereby driving the contact to disconnect from the first static contact 222.

[0070] Further, the above-mentioned moving contact and the first stationary contact 222 are formed of materials with good electrical conductivity. Exemplarily, materials with good electrical conductivity can be, but are not limited to, gold, silver, copper, and their alloys. In an alternative embodiment, the moving contact in the first moving contact 221 and the first stationary contact 222 are made of silver with good electrical conductivity.

[0071] In this embodiment, a first moving mechanism 23 is provided between the first handle mechanism 21 and the first moving contact 221. Both ends of the first moving mechanism 23 are respectively connected to the first handle mechanism 21 and the first moving contact 221. When closing the circuit breaker, the first handle mechanism 21 drives the first moving mechanism 23 to form a linkage structure with the first moving contact 221, so that the first moving contact 221 is closed with the first stationary contact 222.

[0072] Further, as Figure 3 and Figure 4 shown, the first moving mechanism 23 includes a first transmission member 231 and a first pushing member 232. One end of the first transmission member 231 is connected to the first handle mechanism 21, and the other end is connected to one end of the first pushing member 232, while the other end of the first pushing member 232 is placed in the notch formed in the moving contact of the above-mentioned first moving contact 221.

[0073] In an alternative embodiment, the first transmission member 231 is a transmission rod, and the first pushing member 232 is a U-shaped shaft.

[0074] It should be noted that the first transmission member 231 and the first pushing member 232 can also be other types of transmission mechanisms. Exemplarily, the first transmission member 231 and the first pushing member 232 can be, but are not limited to, gears and cams.

[0075] In this embodiment, the buffer member 24 is installed between the first handle mechanism 21 and the first moving contact 22. When closing the 1P+N circuit breaker, the buffer member 24 cooperates with the first protrusion 211 on the first handle mechanism 21 and the blocking portion 2211 on the first moving contact 221 to delay the contact between the first moving contact 221 and the first stationary contact 222. Furthermore, the second contact mechanism 32 of the N-pole assembly 30 closes prior to the closing of the first moving contact 221 and the first stationary contact 222 in the L-pole assembly 20. Thus, after the second contact mechanism 32 is closed, since a closed loop is not formed, no arc will be generated; when the first moving contact 221 and the first stationary contact 222 in the L-pole assembly 20 are closed, a closed loop is formed, and at this time, arcs will be generated on the first moving contact 221 and the first stationary contact 222. Since the L-pole assembly 20 includes an arc extinguishing chamber 27, the arcs can be eliminated to protect the contacts.

[0076] As an alternative embodiment, the buffer member 24 includes a first contact portion 241 and a second contact portion 244, and at least one bending portion is formed between the first contact portion 241 and the second contact portion 244 of the buffer member 24.

[0077] In a specific embodiment of the present invention, as Figure 3 shown, a first bending portion 242 and a second bending portion 243 are formed between the first contact portion 241 and the second contact portion 244 of the buffer member 24, which is beneficial to delaying the closing of the first moving contact 221 and the first stationary contact 222.

[0078] The buffer member 24 in the above embodiment is made of an elastic material. Exemplarily, the elastic material includes thermosetting elastomers and thermoplastic elastomers. In a specific embodiment of the present invention, the elastic material is selected from thermoplastic elastomers.

[0079] As Figure 6 shown, the first tripping mechanism 25 includes a first latch 251 and a first linkage shaft 252, and the first latch 251 has a first through hole 2511, and a first triggering portion 2512 is provided on the first latch 251. The first linkage shaft 252 passes through the first through hole 2511 of the first latch 251 and is connected to the second tripping mechanism 34 in the N - pole assembly 30. When the circuit breaker is disconnected, after the first tripping mechanism 25 is triggered, the first triggering portion 2511 will break the link structure between the first moving mechanism 23 and the first moving contact 221, and then, under the action of the spring, drive the first moving contact 221 to separate from the first stationary contact 222. Moreover, the first tripping mechanism 25 in the L - pole assembly 20 will drive the second tripping mechanism 34 in the N - pole assembly 30 to move together, so that the contact mechanism in the N - pole assembly 30 is disconnected, thus ensuring safety.

[0080] To prevent the circuit breaker from being damaged by the heat generated by high current in case of short - circuit, or even causing a fire, therefore, as Figure 2 shown, a magnetic tripping mechanism 26 is provided in the L - pole assembly 20 of the 1P + N circuit breaker, and is close to the first tripping mechanism 25, and is used to trigger the first tripping mechanism 25 to disconnect the 1P + N circuit breaker when the current in the circuit is greater than the normal current.

[0081] Regarding the magnetic tripping mechanism 26 in this embodiment, its structure and working principle are well - known to those skilled in the art and will not be elaborated herein.

[0082] As Figure 2 shown, the L - pole assembly 20 includes an arc - extinguishing chamber 27, which is close to the first contact mechanism 22 and is used to eliminate the arc generated by the closing or opening of the first moving contact 221 and the first stationary contact 222, thereby preventing the contacts from being damaged by the arc.

[0083] For the arc extinguishing chamber 27 in this embodiment, its structure and working principle are well-known to those skilled in the art, and will not be elaborated here.

[0084] As Figure 5 shown, the N-pole assembly 30 includes: a second handle mechanism 31, a second contact mechanism 32, a second moving mechanism 33, and a second tripping mechanism 34.

[0085] Among them, the second handle mechanism 31 includes a second handle body 311, a second intermediate shaft 312 installed in the second handle body 311, and a linkage rod. One end of the second intermediate shaft 312 is connected to the other end of the first intermediate shaft 213 through the linkage rod to realize the synchronous movement of the first handle body 212 and the second handle body 311.

[0086] The second contact mechanism 32 includes a second moving contact 321 and a second static contact 322. Among them, the second moving contact includes a buckle, a contact, and a spring. The buckle is located below the contact and is connected to the second moving mechanism 33. Moreover, an installation hole is provided on the buckle and an installation part is provided. The contact is fixed to the buckle by screws passing through one end of it and the installation hole in sequence. One end of the spring (not shown in the figure) is installed on the installation part of the buckle, and the other end is fixed to the housing. When closing the circuit breaker, an external force drives the buckle to drive the contact to contact the second static contact 322. At this time, the spring also moves and elongates together. When opening the circuit breaker, when the external force gradually decreases, the spring will return to its original position, thereby driving the contact to disconnect from the first static contact 222.

[0087] Furthermore, the above-mentioned contact and the second static contact 322 are formed of materials with good electrical conductivity. Exemplarily, materials with good electrical conductivity can be but are not limited to gold, silver, copper, and their alloys. In an alternative embodiment, the contact in the second moving contact 321 and the second static contact 322 are made of silver with good electrical conductivity.

[0088] In this embodiment, a second moving mechanism 33 is provided between the second handle mechanism 31 and the second moving contact 321. Both ends of the second moving mechanism 33 are respectively connected to the second handle mechanism 31 and the second moving contact 321. When closing the circuit breaker, the second handle mechanism 31 drives the second moving mechanism 33 to form a linkage structure with the second moving contact 321, so that the second moving contact 321 is closed with the second static contact 322.

[0089] Specifically, the second moving mechanism 33 has the same composition as the first moving mechanism 23. As Figure 5As shown, the second movable mechanism 33 includes a second transmission member 331 and a second pushing member 332. One end of the second transmission member 331 is connected to the second handle mechanism 31, and the other end is connected to one end of the second pushing member 332, while the other end of the second pushing member 332 is placed in a notch formed in the contact head of the second moving contact 321.

[0090] In an alternative embodiment, the second transmission member 331 is a transmission rod, and the second pushing member 332 is a U-shaped shaft.

[0091] It should be noted that the second transmission member 331 and the second pushing member 332 can also be other types of transmission mechanisms. Exemplarily, the second transmission member 331 and the second pushing member 332 can be, but are not limited to, gears and cams.

[0092] As Figure 6 shown, the second tripping mechanism 34 includes a second latch 341, which has a second through hole 3411, and a second triggering portion 3412 is provided on the second latch 341. The first linkage shaft 252 is inserted into the first through hole 2511 in the first latch 251 and the second through hole 3411 in the second latch 341 to connect the first latch 251 and the second latch 341. Moreover, the diameter of the first through hole 2511 in the first latch 251 is smaller than the diameter of the second through hole 3411 in the second latch 341, and the diameter of the first through hole 2511 is the same as the diameter of the first linkage shaft 252.

[0093] When disconnecting the 1P+N circuit breaker, since the diameter of the first linkage shaft 252 is the same as that of the first through hole 2511 in the first latch 251 but smaller than the diameter of the second through hole 3411 in the second latch 341, the first latch 251 will first break the link structure between the first movable mechanism 23 and the first moving contact 221, and then the first linkage shaft 252 contacts the inner wall of the second through hole 3411 and applies a force to drive the second triggering portion 3412 on the second latch 341 to break the link structure between the second movable mechanism 33 and the second moving contact 321. Furthermore, the first tripping mechanism 25 and the second tripping mechanism 34 cooperate to make the disconnection of the first moving contact 221 and the first static contact 222 prior to the disconnection of the second moving contact 321 and the second static contact 322, so that no arc is generated when the second contact mechanism 32 of the N-pole assembly 30 is disconnected, preventing damage.

[0094] Embodiment Two

[0095] Please refer to Figure 6 and 7 , Embodiment Two of this application provides a 1P+N circuit breaker for remotely controlling the closing or opening of the circuit breaker on the basis of Embodiment One. In addition to the components in Embodiment One, this circuit breaker further includes: an isolating member 13, an electric operating mechanism 40, and a control device 50.

[0096] Among them, the partition 13 is installed in the housing 10 and divides the cavity of the housing 10 into a first chamber and a second chamber. The control device 50 is installed in the first chamber, and the electric operating mechanism 40, the L-pole assembly 20, and the N-pole assembly 30 are all installed in the second chamber. In addition, the partition 13 is also an insulating part, which is made of ceramic material or plastic material and is formed by an injection molding process. In an alternative embodiment, the partition 13 is made of plastic material.

[0097] In this embodiment, the electric operating mechanism 40 is respectively connected to the control device 50 and the second handle mechanism 31. The control device 50 drives the second handle mechanism 31 through the electric operating mechanism 40 to close the 1P+N circuit breaker and drives the second tripping mechanism 34 to open the 1P+N circuit breaker.

[0098] As an alternative embodiment, the first handle mechanism 21 includes a first handle body 212 and a first intermediate shaft 213 installed in the first handle body 212, and a first protrusion 211 is provided at one end of the first intermediate shaft 231. For its working principle, as described in Embodiment 1, it will not be elaborated here.

[0099] As Figure 5 shown, the second handle mechanism 31 includes a second handle body 311, a second intermediate shaft 312 installed in the second handle body 311, and a linkage rod. One end of the second intermediate shaft 312 is connected to the other end of the first intermediate shaft 213 through the linkage rod to realize the synchronous movement of the first handle body 212 and the second handle body 311. In addition, a gear 313 is provided on the second intermediate shaft 312 for cooperating with the above-mentioned electric operating mechanism 40 to drive the second handle mechanism 31 and the first handle mechanism 21 to close or open the 1P+N circuit breaker.

[0100] In this embodiment, the electric operating mechanism 40 can reduce its wear degree during torque transmission, thereby extending its service life. As an alternative embodiment, as Figure 8 and 9 shown, the electric operating mechanism 40 includes a driving member 41 and a gear assembly 42. Among them, the gear assembly 42 can reduce the rotational speed to increase the torque, and thus can improve the electric operating mechanism 40 to provide a large enough acting force to shorten the closing time.

[0101] As an alternative embodiment, as Figure 9As shown, the gear assembly 42 includes a first double gear 421, a second double gear 422, a third double gear 423, and a fourth double gear 424. The output end of the driving member 41 is connected to the large gear of the first double gear 421. The small gear of the first double gear 421 meshes with the large gear of the second double gear 422. The small gear of the second double gear 422 meshes with the large gear of the third double gear 423. The small gear of the third double gear 423 meshes with the large gear of the fourth double gear 424. The small gear of the fourth double gear 424 meshes with the gear 313 on the second intermediate shaft 312.

[0102] Since the space in the circuit breaker is small, it is necessary to further optimize the structure of the electric operating mechanism 40 so that it can adapt to the miniaturized circuit breaker. In an alternative embodiment, a worm is installed at the output end of the driving member 41, and the gear on the worm is a helical gear. Therefore, the large gear of the first double gear 421 is also set as a helical gear. Further, the gear on the worm meshes with the large gear of the first double gear 421 to connect the output end of the driving member 40 to the first double gear 421, thereby transmitting the driving force of the driving member 40 to the first double gear 421. Moreover, the setting of the above worm can not only optimize the space of the circuit breaker, but also have an anti-locking function after meshing with the first double gear 421, further improving the safety of the operating structure.

[0103] In an alternative embodiment, the gear 313 provided on the second handle mechanism 31 is an incomplete gear. In order to cooperate with the gear 313 to achieve opening and closing actions, the small gear of the fourth double gear 424 is also set as an incomplete gear.

[0104] Further, when the circuit breaker is assembled, the fourth double gear 424 needs to pass through the circuit board. Therefore, for the convenience of assembly, in an alternative embodiment, the large gear of the fourth double gear 424 has a transmission shaft, and the small gear has a sleeve. When the circuit breaker is assembled, the transmission shaft on the large gear passes through the through hole on the circuit board and is inserted into the sleeve of the small gear. At the same time, in order to enable the large gear and the small gear to rotate synchronously, a protrusion is provided on the transmission shaft of the large gear, and a hole is provided on one side of the sleeve of the small gear. After the transmission shaft is inserted into the sleeve, the large gear and the small gear rotate synchronously through the cooperation of the protrusion on the transmission shaft and the hole on the sleeve.

[0105] In addition, as Figure 10 shown, a second protrusion 4241 is provided on the small gear of the fourth double gear 424, which is used to trigger the second tripping mechanism 34 to disconnect the 1P+N circuit breaker.

[0106] Further, in this embodiment, in addition to the second locking mechanism 34 including the second latch 341, the second unlocking mechanism 342 and the second linkage shaft 343 are further included. The second unlocking mechanism 342 is linked with the second latch 341 through the second linkage shaft 343. After the control device 50 issues an instruction to disconnect the circuit breaker, the driving member 41 electrically connected to the control device 40 drives the double gear to rotate. When the fourth double gear 424 rotates a certain angle, the second protrusion 4241 thereon cooperates with the second unlocking mechanism 342 to drive the second latch 341 to move to make the 1P+N circuit breaker.

[0107] In this embodiment, the control device 40 may include a switching module for automatic and manual modes and a single-chip microcomputer electrically connected to the switching module. When in the automatic mode, the single-chip microcomputer can receive an instruction to remotely control the closing or opening of the circuit breaker, but cannot manually close or open the circuit breaker, thus meeting the prepaid control function; when in the manual mode, the circuit breaker can be remotely controlled to open or close, and the circuit breaker can also be manually closed.

[0108] In an alternative embodiment, as Figure 7 shown, a feedback signal interface 51 is installed on the control device 50, and the feedback signal interface is used for plugging in the feedback signal terminal.

[0109] The embodiment of the present invention further provides an electrical device, and the electrical device is installed with the 1P+N circuit breaker in the above embodiment.

[0110] In the electrical device provided by the present invention, since the 1P+N circuit breaker in the above embodiment is installed, the electrical device also has the same advantages as the above 1P+N circuit breaker. For specific details, reference can be made to the relevant description, and details will not be repeated here.

[0111] In the description of this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0112] In the description of this specification, the description with reference to terms such as "one implementation manner", "some implementation manners", "illustrative implementation manners", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the implementation manner or example are included in at least one implementation manner or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same implementation manner or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more implementation manners or examples.

[0113] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0114] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0115] In the present invention, unless otherwise clearly specified, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral molding; it may be a mechanical connection, an electrical connection, or a communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A 1P+N circuit breaker, characterized in that, Comprising: A housing having a cavity and made of plastic material; An L-pole assembly installed in the cavity, the L-pole assembly comprising: A first handle mechanism provided with a first protrusion; A first contact mechanism including a first moving contact and a first static contact, with a blocking portion provided on the first moving contact; A first moving mechanism connected between the first handle mechanism and the first moving contact, the first handle mechanism driving the first moving contact to close with the first static contact through the first moving mechanism; A buffer member installed between the first handle mechanism and the first moving contact. When closing the 1P+N circuit breaker, the buffer member cooperates with the first protrusion on the first handle mechanism and the blocking portion on the first moving contact to delay the contact between the first moving contact and the first static contact; A first tripping mechanism including a first latch and a first linkage shaft, and the first latch having a first through hole; A magnetic tripping mechanism close to the first tripping mechanism; An arc extinguishing chamber close to the first contact mechanism; An N-pole assembly installed in the cavity, the N-pole assembly comprising: A second handle mechanism connected to the first handle mechanism for synchronous movement; A second contact mechanism including a second moving contact and a second static contact; A second moving mechanism connected between the second handle mechanism and the second moving contact, the second handle mechanism driving the second moving contact to close with the second static contact through the second moving mechanism; A second tripping mechanism including a second latch having a second through hole. The first linkage shaft is inserted into the first through hole in the first latch and the second through hole in the second latch to connect the first latch and the second latch; the diameter of the first through hole is smaller than the diameter of the second through hole and is the same as the diameter of the first linkage shaft. When opening the 1P+N circuit breaker, the first tripping mechanism and the second tripping mechanism cooperate to make the disconnection of the first moving contact and the first static contact prior to the disconnection of the second moving contact and the second static contact.

2. The 1P+N circuit breaker according to claim 1, characterized in that, The first handle mechanism includes a first handle body and a first intermediate shaft installed in the first handle body, and the first protrusion is provided at one end of the first intermediate shaft; The second handle mechanism includes a second handle body, a second intermediate shaft installed in the second handle body, and a linkage rod. One end of the second intermediate shaft is connected to the other end of the first intermediate shaft through the linkage rod.

3. The 1P+N circuit breaker according to claim 1, characterized in that, The first moving mechanism includes a first transmission member and a first pushing member. One end of the first transmission member is connected to the first handle mechanism, the other end of the first transmission member is connected to one end of the first pushing member, and the other end of the first pushing member contacts the first moving contact to drive the first moving contact to close with the first static contact.

4. The 1P+N circuit breaker according to claim 3, characterized in that, The first moving mechanism and the second moving mechanism have the same structure.

5. The 1P+N circuit breaker according to claim 4, characterized in that, The buffer member has a first contact portion and a second contact portion, and at least one bending portion is formed between the first contact portion and the second contact portion of the buffer member.

6. The 1P+N circuit breaker according to any one of claims 1-5, characterized in that, The 1P+N circuit breaker further includes: An isolating member, which is installed in the housing and divides the cavity of the housing into a first chamber and a second chamber; A control device, installed in the first chamber; An electric operating mechanism, installed in the second chamber; Both the L-pole assembly and the N-pole assembly are installed in the second chamber. The second tripping mechanism further includes a second trip and a second linkage shaft, and the second trip is linked with the second latch through the second linkage shaft; Wherein, the electric operating mechanism is respectively connected to the control device and the second handle mechanism. The control device drives the second handle mechanism through the electric operating mechanism to close the 1P+N circuit breaker, and drives the second trip to drive the second latch and the first latch to open the 1P+N circuit breaker.

7. The 1P+N circuit breaker according to claim 6, characterized in that, The first handle mechanism includes a first handle body and a first intermediate shaft installed in the first handle body, and the first protrusion is arranged at one end of the first intermediate shaft; The second handle mechanism includes a second handle body, a second intermediate shaft installed in the second handle body, a gear and a linkage rod installed on the second intermediate shaft. One end of the second intermediate shaft is connected to the other end of the first intermediate shaft through the linkage rod.

8. The 1P+N circuit breaker according to claim 7, characterized in that, The electric operating mechanism includes a driving member and a gear assembly; The gear assembly includes a first double gear, a second double gear, a third double gear and a fourth double gear. The output end of the driving member is connected to the large gear of the first double gear. The small gear of the first double gear meshes with the large gear of the second double gear. The small gear of the second double gear meshes with the large gear of the third double gear. The small gear of the third double gear meshes with the large gear of the fourth double gear. The small gear of the fourth double gear meshes with the gear on the second intermediate shaft; A second protrusion is arranged on the small gear of the fourth double gear, which is used to trigger the second tripping mechanism to open the 1P+N circuit breaker.

9. The 1P+N circuit breaker according to claim 7 or 8, characterized in that, A feedback signal interface is installed on the control device, and the feedback signal interface is used for plugging in a feedback signal terminal.

10. An electrical device, characterized in that, The electrical equipment is installed with the 1P+N circuit breaker according to any one of claims 1-9.

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