CN213242465U

CN213242465U - High-breaking miniature circuit breaker

Info

Publication number: CN213242465U
Application number: CN202022493360.3U
Authority: CN
Inventors: 郑旭腾; 潘伟杰
Original assignee: Shanghai Fanatong Electron Co ltd
Current assignee: Shanghai Fanatong Electron Co ltd
Priority date: 2020-11-02
Filing date: 2020-11-02
Publication date: 2021-05-18
Anticipated expiration: 2030-11-02

Abstract

The utility model provides a high-breaking miniature circuit breaker, which comprises a shell, and an operating mechanism, an electromagnetic tripping mechanism, an arc extinguishing mechanism and a contact mechanism which are arranged in the shell, wherein the shell comprises a cover plate which is matched and arranged between a base and the base, the base and the cover plate are matched to form a sealing structure, and two ends of the base are provided with wiring terminals for connecting cables; a grid groove which is beneficial to arc striking is designed at one side of the square cavity, and an arc discharge port for discharging the arc is designed at the bottom behind the square cavity. The lower part of the static contact is provided with an arc leading part extending from the static contact, so that electric arc can be quickly led into the arc extinguish chamber, and the electric arc can be quickly extinguished. The arc extinguishing device has the advantages of simple structure, good arc extinguishing effect, stable and reliable performance and high breaking capacity.

Description

High-breaking miniature circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field specifically is a high disconnected miniature circuit breaker that divides.

Background

The miniature circuit breaker is a commonly used electric switch, is mainly used in various places such as industry, commerce, civil residence and the like, can not only break and connect normal load current, but also automatically cut off the line when the line has faults such as overload, short circuit and the like, thereby protecting personal and property safety.

Miniature circuit breaker includes casing, operating device, electromagnetism tripping device, arc extinguishing mechanism, contact mechanism, and the structural design of current miniature circuit breaker's arc extinguishing system is unreasonable, leads to this miniature circuit breaker's arc extinguishing effect ideal inadequately, and breaking capacity is relatively poor, and life is shorter.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a high disconnected miniature circuit breaker that divides to solve the problem that proposes in the above-mentioned background art.

The utility model provides a technical problem adopt following technical scheme to realize: a high breaking small circuit breaker comprises a shell, an operating mechanism, an electromagnetic tripping mechanism, an arc extinguishing mechanism and a contact mechanism, wherein the operating mechanism, the electromagnetic tripping mechanism, the arc extinguishing mechanism and the contact mechanism are arranged in the shell;

arc extinguishing mechanism is including setting up explosion chamber, the striking piece of setting at the explosion chamber lower extreme in the base, it is equipped with the square cavity of placing to correspond the explosion chamber in the base, and one side of explosion chamber is provided with a plurality of curved isolated arc bars, and the isolated arc bars interval sets up and constitutes a plurality of bars grid groove, and the explosion chamber is kept away from the isolated arc bars and is equipped with the electric arc and let out the mouth, is equipped with in the electric arc let out mouth and lets out the arc guide piece, and the gaseous quick discharge of being convenient for is favorable to reinforcing arc extinguishing effect, the outer end and the bimetallic strip of striking.

As a further aspect of the present invention: the electromagnetic tripping mechanism comprises a magnetic yoke, a coil and an iron core assembly, wherein the coil and the iron core assembly are arranged on the magnetic yoke, the coil is wound and sleeved on the magnetic yoke, one end of the coil is connected with a wiring terminal, and the other end of the coil is connected with the contact mechanism.

As a further aspect of the present invention: the operating mechanism comprises a handle, a rotating plate, a jump buckle, a lock catch and a connecting rod, wherein the handle is connected with the jump buckle through the connecting rod, one end of the rotating plate is rotatably arranged on the positioning shaft, the jump buckle and the lock catch are respectively rotatably arranged on corresponding rotating shafts of the rotating plate, and the jump buckle and the lock catch are mutually matched.

As a further aspect of the present invention: the contact mechanism comprises a contact frame, a fixed contact and a moving contact, wherein the contact frame is arranged in a linkage manner with the operating mechanism, the fixed contact and the moving contact are arranged on the contact frame, the contact frame is rotatably arranged on the positioning shaft, one end of the fixed contact is connected to the magnetic yoke, the lower portion of the fixed contact is provided with an extended arc-leading portion, the arc-leading portion is of a bent arc hook-shaped structure, the tail portion of the arc-leading portion extends into the arc extinguish chamber, one side, close to the moving contact, of the fixed contact is provided with corresponding contacts, and the moving contact is connected with the.

As a further aspect of the present invention: the iron core assembly comprises an iron core sleeve, a movable iron core, a static iron core and an ejector rod, wherein the movable iron core, the static iron core and the ejector rod are arranged in the iron core sleeve, one end of the ejector rod is connected with the movable iron core, and the other end of the ejector rod extends out after penetrating through the static iron core.

Compared with the prior art, the beneficial effects of the utility model are that: the connecting terminal on the right side of the shell is connected with the moving contact through the bimetallic strip, the moving contact is connected with the coil through the linked operating mechanism, and the other end of the coil is connected with the connecting terminal on the left side of the shell; because the coil is wound on the magnetic yoke, a larger magnetic field is generated when the current is too large, the ejector rod in the iron core assembly extends out to touch the lock catch, the lock catch is released and rebounded to trip the operating mechanism, and the moving contact is separated from the static contact, so that the power failure is realized; when the switch is switched on, the handle drives the trip buckle through the connecting rod, the trip buckle is buckled with the lock catch, the contact rack is driven to act by taking the positioning shaft as a rotating point, after the moving contact is contacted with the static contact, the handle continues to apply force, and after the connecting rod passes through the vector point, the operating mechanism completes the switch-on. A grid groove which is beneficial to arc striking is designed at one side of the square cavity, and an arc discharge port for discharging the arc is designed at the bottom behind the square cavity. The lower part of the static contact is provided with an arc leading part extending from the static contact, so that electric arc can be quickly led into the arc extinguish chamber, and the electric arc can be quickly extinguished. The arc extinguishing device has the advantages of simple structure, good arc extinguishing effect, stable and reliable performance and high breaking capacity.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is a schematic front view of the structure of the present invention;

fig. 3 is a schematic perspective view of the internal layout of the present invention;

fig. 4 is a front view structure diagram of the internal layout of the present invention;

the following are marked in the figure: 1. a housing; 2. an operating mechanism; 3. an electromagnetic trip mechanism; 4. an arc extinguishing mechanism; 5. a contact mechanism; 11. a base; 12. a cover plate; 13. a wiring terminal; 21. a handle; 22. rotating the plate; 23. jumping and buckling; 24. locking; 25. a connecting rod; 26. positioning the shaft; 31. a magnetic yoke; 32. a coil; 33. a top rod; 41. an arc extinguishing chamber; 42. an arc striking sheet; 43. an arc barrier; 44. an arc discharge port; 45. an arc discharge guide sheet; 51. a contact head frame; 52. static contact; 53. a moving contact; 54. an arc striking part; 55. a bimetal strip.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the specific drawings.

As shown in FIGS. 1-4,

the embodiment provides a high-breaking miniature circuit breaker, which comprises a shell 1, an operating mechanism 2, an electromagnetic tripping mechanism 3, an arc extinguishing mechanism 4 and a contact mechanism 5, wherein the operating mechanism 2, the electromagnetic tripping mechanism 3, the arc extinguishing mechanism 4 and the contact mechanism 5 are arranged in the shell 1, the shell 1 comprises a base 11 and a cover plate 12 which are arranged in a matching manner, the base 11 and the cover plate 12 are matched to form a sealing structure, and two ends of the base 11 are provided with wiring terminals 13 for connecting cables; arc extinguishing mechanism 4 is including setting up explosion chamber 41 in base 11, setting up the striking plate 42 at explosion chamber 41 lower extreme, it is equipped with the square cavity of placing to correspond explosion chamber 41 in the base 11, and one side of explosion chamber 41 is provided with a plurality of curved barrier 43, and barrier 43 interval sets up and constitutes a plurality of grid grooves, and arc chamber 41 keeps away from barrier 43 and is equipped with arc discharge port 44, is equipped with in arc discharge port 44 and discharges arc guide plate 45, and the gaseous quick discharge of being convenient for is favorable to reinforcing arc extinguishing effect, the outer end and the bimetallic strip 55 of striking plate 42 are connected.

In this embodiment, the electromagnetic trip mechanism 3 includes a magnetic yoke 31, and a coil 32 and an iron core assembly that are disposed on the magnetic yoke 31, the coil 32 is wound and sleeved on the magnetic yoke 31, one end of the coil 32 is connected with the connection terminal 13, and the other end is connected with the contact mechanism.

In this embodiment, the operating mechanism 2 includes a handle 21, a rotating plate 22, a jump ring 23, a lock catch 24 and a connecting rod 25, the handle 21 is connected with the jump ring 23 through the connecting rod 25, one end of the rotating plate 22 is rotatably disposed on a positioning shaft 26, the jump ring 23 and the lock catch 24 are respectively rotatably disposed on corresponding rotating shafts of the rotating plate 22, and the jump ring 23 and the lock catch 24 are disposed in a matching manner.

In this embodiment, the contact mechanism 5 includes a contact holder 51 linked with the operating mechanism 2, a fixed contact 52 and a movable contact 53 that are disposed on the contact holder 51, the contact holder 51 is rotatably disposed on the positioning shaft 26, one end of the fixed contact 52 is connected to the magnetic yoke 31, an extended arc striking portion 54 is disposed at a lower portion of the fixed contact 52, the arc striking portion 54 is a bent arc hook-shaped structure, a tail portion of the arc striking portion 54 extends into the arc extinguishing chamber 41, contacts corresponding to each other are disposed at a side of the fixed contact 52 close to the movable contact 53, and the movable contact 53 is connected to the connection terminal 13 through a bimetal 55.

In this embodiment, iron core subassembly includes iron core sleeve pipe and sets up moving iron core, quiet iron core and ejector pin 33 in the iron core sleeve pipe, ejector pin 33 one end with move the iron core and be connected, the other end passes and stretches out behind the quiet iron core.

The utility model discloses a theory of operation does: the connecting terminal 13 on the right side of the shell 1 is connected with the moving contact 53 through a bimetallic strip, the moving contact 53 is connected with the coil 32 through the linked operating mechanism 2, and the other end of the coil 32 is connected with the connecting terminal 13 on the left side of the shell 1; because the coil 32 is wound on the magnetic yoke 31, a larger magnetic field is generated when the current is too large, the ejector rod 33 in the iron core assembly extends out to touch the lock catch 24, the lock catch 24 is released and rebounded to trip the operating mechanism 2, and the moving contact 53 is separated from the static contact 52, so that the power failure is realized; when the switch is switched on, the handle 21 drives the trip 23 through the connecting rod 25, the trip 23 is buckled with the lock catch 24, and the contact 53 frame 51 is driven to move by taking the positioning shaft 26 as a rotating point, after the moving contact 53 is contacted with the static contact 52, the handle 21 continues to apply force, and after the connecting rod 25 crosses a vector point, the operating mechanism 2 completes the switch-on.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high disconnected miniature circuit breaker that divides, includes casing and sets up operating device, electromagnetism tripping device, arc extinguishing mechanism and the contact mechanism in the casing, its characterized in that: the shell comprises a base and a cover plate which is matched with the base, the base and the cover plate are matched to form a sealing structure, and two ends of the base are provided with wiring terminals for connecting cables;

2. A high breaking small sized circuit breaker according to claim 1, wherein: the electromagnetic tripping mechanism comprises a magnetic yoke, a coil and an iron core assembly, wherein the coil and the iron core assembly are arranged on the magnetic yoke, the coil is wound and sleeved on the magnetic yoke, one end of the coil is connected with a wiring terminal, and the other end of the coil is connected with the contact mechanism.

3. A high breaking small sized circuit breaker according to claim 2, wherein: the operating mechanism comprises a handle, a rotating plate, a jump buckle, a lock catch and a connecting rod, wherein the handle is connected with the jump buckle through the connecting rod, one end of the rotating plate is rotatably arranged on the positioning shaft, the jump buckle and the lock catch are respectively rotatably arranged on corresponding rotating shafts of the rotating plate, and the jump buckle and the lock catch are mutually matched.

4. A high breaking small sized circuit breaker according to claim 3, wherein: the contact mechanism comprises a contact frame, a fixed contact and a moving contact, wherein the contact frame is arranged in a linkage manner with the operating mechanism, the fixed contact and the moving contact are arranged on the contact frame, the contact frame is rotatably arranged on the positioning shaft, one end of the fixed contact is connected to the magnetic yoke, the lower portion of the fixed contact is provided with an extended arc-leading portion, the arc-leading portion is of a bent arc hook-shaped structure, the tail portion of the arc-leading portion extends into the arc extinguish chamber, one side, close to the moving contact, of the fixed contact is provided with corresponding contacts, and the moving contact is connected with the.

5. A high breaking small sized circuit breaker according to claim 4, wherein: the iron core assembly comprises an iron core sleeve, a movable iron core, a static iron core and an ejector rod, wherein the movable iron core, the static iron core and the ejector rod are arranged in the iron core sleeve, one end of the ejector rod is connected with the movable iron core, and the other end of the ejector rod extends out after penetrating through the static iron core.