阅读说明：本技术 一种断路器 (Circuit breaker ) 是由 李军挺 邓艺军 南寅 梁光越 曾伟 代朔 于 2021-03-18 设计创作，主要内容包括：一种断路器,包括绝缘外壳和设置于所述绝缘外壳内的操作系统、旋转双断点动触头系统、静触头系统、磁脱扣系统、热脱扣系统、灭弧系统、脱扣组件和导体,所述旋转双断点动触头系统包括第一动触头和第二动触头,所述静触头系统包括第一静触头和第二静触头,所述灭弧系统包括第一灭弧室和第二灭弧室,所述热脱扣系统与所述磁脱扣系统之间连接有软导体,所述热脱扣器系统与所述磁脱扣系统临近设置并设置于所述第二灭弧室的上方,并与所述同侧的第二静触头形成电气连接后可与所述旋转双断点动触头系统连接或分断,所述操作系统设置在所述第一灭弧室的上方,所述操作系统、所述磁脱扣系统和所述热脱扣系统设置在所述绝缘外壳的同一侧。(A circuit breaker comprises an insulating shell, an operating system, a rotating double-breakpoint moving contact system, a static contact system, a magnetic tripping system, a thermal tripping system, an arc extinguishing system, a tripping assembly and a conductor, wherein the operating system, the rotating double-breakpoint moving contact system, the static contact system, the magnetic tripping system, the thermal tripping system, the arc extinguishing system and the magnetic tripping system are arranged in the insulating shell, the rotating double-breakpoint moving contact system comprises a first moving contact and a second moving contact, the arc extinguishing system comprises a first arc extinguish chamber and a second arc extinguish chamber, a soft conductor is connected between the thermal tripping system and the magnetic tripping system, the thermal tripping system and the magnetic tripping system are arranged close to and above the second arc extinguish chamber, and can be connected with or disconnected with the rotating double-breakpoint moving contact system after being electrically connected with the second static contact at the same side, the operating system is arranged above the first arc extinguish chamber, and the operating system, The magnetic tripping system and the thermal tripping system are arranged on the same side of the insulating shell.)

1. A circuit breaker comprises an insulating shell (100), an operating system (200), a rotating double-breakpoint moving contact system (300), a static contact system (400), a magnetic tripping system (500), a thermal tripping system (600), an arc extinguishing system (700), a tripping assembly (800) and a conductor (900), wherein the operating system (200), the rotating double-breakpoint moving contact system (300), the static contact system (400), the magnetic tripping system (500), the thermal tripping system (600), the arc extinguishing system (700), the tripping assembly (800) and the conductor (900) are arranged in the insulating shell (100), the rotating double-breakpoint moving contact system (300) comprises a first moving contact (321) and a second moving contact (322), the static contact system (400) comprises a first static contact (410) and a second static contact (420), the arc extinguishing system (700) comprises a first arc extinguish chamber (710) and a second arc extinguish chamber (720), and the circuit breaker is characterized in that a soft conductor (620) is connected between the thermal tripping system (600) and the magnetic tripping system (500), the thermal tripping system (600) is arranged close to the magnetic tripping system (500) and arranged above the second arc extinguish chamber (720), and can be connected or disconnected with the rotary double-breakpoint moving contact system (300) after being electrically connected with the second fixed contact (420) at the same side.

2. A circuit breaker according to claim 1, characterized in that said operating system (200) is arranged above said first arc chute (710), said operating system (200), said magnetic trip system (500) and said thermal trip system (600) being arranged on the same side of said insulating case (100).

3. A circuit breaker according to claim 2, wherein: the clockwise or anticlockwise rotation of the rotary double-breakpoint moving contact system (300) can enable the rotary double-breakpoint moving contact system (300) to be in contact with the static contact system (400).

4. A circuit breaker according to claim 2, characterized in that said operating system (200) comprises an adapter (230) and a latch, said latch being rotatably connected to said adapter (230), and the connection point of said latch to said rotary double break point moving contact system (300) being located on either side of the line connecting the center of rotation of said adapter (230) and the center of rotation of said rotary double break point moving contact system (300).

5. A circuit breaker according to claim 2, wherein: the rotating center (311) of the rotating double-breakpoint moving contact system (300) is hinged to the fixed shaft (111) and movably connected with the two sides of the insulating shell (100) through the fixed shaft (111).

6. A circuit breaker according to claim 2, wherein: the rotating center (311) of the rotating double-breakpoint movable contact system (300) is movably arranged on a device or a support which is not integrated with the insulating shell (100) in the insulating shell (100).

7. A circuit breaker according to claim 2, wherein: the operating system (200) is of a push button type or a swing type.

8. A circuit breaker according to claim 2, wherein: at least one end of the circuit breaker is provided with at least one of a screw fastening type terminal or a plug-in type terminal.

9. A circuit breaker according to claim 2, wherein: the conductor (900) is arranged below the rotary double-breakpoint moving contact system (300) and is insulated from the rotary double-breakpoint moving contact system (300).

10. A circuit breaker according to claim 2, wherein: the rotary double-breakpoint movable contact system (300) comprises a contact support (310), a movable contact bridge (320), a first elastic element (330) and a second elastic element (340), wherein the first elastic element and the second elastic element are oppositely arranged, and the first movable contact (321) and the second movable contact (322) are respectively arranged at two ends of the movable contact bridge (320) and are respectively connected with or disconnected from a first fixed contact (410) and a second fixed contact (420) at the same time.

11. A circuit breaker according to claim 10, wherein: the movable contact bridge (320) is further provided with a first positioning boss (323), a second positioning boss (324) and a waist-round hole (325), and a rotation center (311) arranged on the contact support (310) penetrates through the waist-round hole (325).

12. A circuit breaker according to claim 10, wherein: two ends of the first elastic piece (330) are respectively arranged on the first positioning boss (323) and in the first limiting groove (312) on the contact support (310), and two ends of the second elastic piece (340) are respectively arranged in the positioning boss (324) and the second limiting groove (313) on the contact support (310).

13. A circuit breaker according to claim 2, wherein: the magnetic tripping system (500) comprises an iron U-shaped magnetic yoke (510), an armature (520) and a third elastic piece (530), wherein an annular conductive coil (511) is wound on the iron U-shaped magnetic yoke (510), and the third elastic piece (530) is arranged in a limiting groove (112) on the insulating shell (110).

14. A circuit breaker according to claim 13, wherein: the armature (520) is provided with a rotating shaft hole (521) which is hinged with the rotating shaft hole (116) on the insulating shell (110) through a rotating shaft (540), one end of the armature (520) is provided with a first pressure plate (522) and a second pressure plate (523), and the first pressure plate (522) is always pressed at one end of the third elastic piece (530).

15. A circuit breaker according to claim 2, wherein: the thermal trip system (600) comprises a bimetallic conductor (610) and a flexible conductor (620), and the thermal trip system (600) is electrically connected with the magnetic trip system (500) through the flexible conductor (620).

16. A circuit breaker according to claim 1, wherein: a fourth elastic part (350) is arranged in the insulating shell (110), the fourth elastic part (350) is sleeved on the fixed shaft (111), one end of the fourth elastic part (350) abuts against the limiting boss (113) of the insulating shell (110), and the other end of the fourth elastic part abuts against the limiting boss (314) of the contact support (310).

17. A circuit breaker according to claim 1, wherein: arc extinguishing system (700) still contains first striking air flue (730), first striking air flue (730) are "L" shape setting along the left side and the below of first explosion chamber (710), and the gas outlet setting is in first explosion chamber (710) below.

Technical Field

The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker.

Background

The existing conventional miniature circuit breakers are installed in a 35mm standard guide rail mode, so that the circuit breaker is required to be provided with relevant buckle parts. In addition, the wire inlet end and the wire outlet end of the conventional circuit breaker are respectively arranged at the upper side and the lower side of the circuit breaker, when the circuit breaker is connected with an external wire, an insulating skin layer with a certain length needs to be stripped off from the wire, and the wire is tightly pressed by a screw on the circuit breaker to realize the connection of the wire inlet end and the wire outlet end, so that the circuit is closed and disconnected, and the safety of people, equipment, lines and the like is protected.

When miniature circuit breaker breaks down in the use, earlier need loosen the screw, then extract the wire from the upper and lower both sides of circuit breaker, pull out the buckle of circuit breaker bottom again, make circuit breaker and installation guide rail separation, the last type circuit breaker of the same size of volume that changes again. The connecting wires exposed outside form a potential safety hazard.

In addition, in some narrow spaces, the upper part and the lower part of the circuit breaker are not provided with enough spaces for dismounting and mounting wires, and the screwdriver cannot stretch into the bottom of the circuit breaker to pull out the bayonet, so that great trouble is caused to the replacement of the circuit breaker, and once the circuit breaker is damaged, the replacement operation is difficult to carry out, and the continuity of power supply is influenced. In addition, the existing product is difficult to realize higher breaking capacity in a narrow space range.

Disclosure of Invention

The existing circuit breaker mentioned in the background is installed in a narrow space, the circuit wiring of the power distribution cabinet needs to be readjusted to adapt to the installation of the circuit breaker, the switching cost is high, and the existing circuit breaker is not suitable for industrial large-batch installation operation and has the defects and disadvantages of low performance index and the like. The invention aims to redesign a circuit breaker, which can effectively overcome the problems by readjusting the contact structure, reducing the volume of the circuit breaker and changing the wiring form of an incoming line and an outgoing line.

The invention is realized by the following technical scheme:

a circuit breaker comprises an insulating shell, an operating system, a rotating double-breakpoint moving contact system, a static contact system, a magnetic tripping system, a thermal tripping system, an arc extinguishing system, a tripping assembly and a conductor, wherein the operating system, the rotating double-breakpoint moving contact system, the static contact system, the magnetic tripping system, the thermal tripping system, the arc extinguishing system and the magnetic tripping system are arranged in the insulating shell, the rotating double-breakpoint moving contact system comprises a first moving contact and a second moving contact, the static contact system comprises a first static contact and a second static contact, the arc extinguishing system comprises a first arc extinguishing chamber and a second arc extinguishing chamber, and the circuit breaker is characterized in that a soft conductor is connected between the thermal tripping system and the magnetic tripping system, the thermal tripping system and the magnetic tripping system are arranged close to and arranged above the second arc extinguishing chamber, and can be connected with the rotating double-breakpoint moving contact system or disconnected after being electrically connected with the second static contact on the same side.

Preferably, the operating system is disposed above the first arc-extinguishing chamber, and the operating system, the magnetic trip system and the thermal trip system are disposed on the same side of the insulating housing.

Preferably, the clockwise or counterclockwise rotation of the rotating double-breakpoint moving contact system can enable the rotating double-breakpoint moving contact system to be in contact with the fixed contact system.

Preferably, the operating system comprises an adapter and a lock, the lock is rotatably connected with the adapter, and a connection point of the lock and the rotary double-breakpoint moving contact system is located on any side of a connection line of a rotation center of the adapter and a rotation center of the rotary double-breakpoint moving contact system.

Preferably, the rotating center of the rotating double-breakpoint moving contact system is hinged to the fixed shaft and movably connected with the two sides of the insulating shell through the fixed shaft.

Preferably, the rotation center of the rotary double-breakpoint movable contact system is movably arranged on a device or a support which is not integrated with the insulating shell in the insulating shell.

Preferably, the operating system is of a push button type or a swing type.

Preferably, at least one end of the circuit breaker is provided with at least one of a screw-fastening type terminal or a plug-in type terminal.

Preferably, the conductor is arranged below the rotary double-breakpoint moving contact system and is insulated from the rotary double-breakpoint moving contact system.

Preferably, the rotating double-breakpoint moving contact system comprises a contact support, a moving contact bridge, and a first elastic element and a second elastic element which are arranged oppositely, wherein the first moving contact and the second moving contact are respectively arranged at two ends of the moving contact bridge and are respectively connected with or disconnected from the first static contact and the second static contact at the same time.

Preferably, the movable contact bridge is further provided with a first positioning boss, a second positioning boss and a waist circular hole, and a rotation center arranged on the contact support penetrates through the waist circular hole.

Preferably, two ends of the first elastic member are respectively disposed in the first positioning boss and the first limiting groove on the contact support, and two ends of the second elastic member are respectively disposed in the positioning boss and the second limiting groove on the contact support.

Preferably, the magnetic tripping system comprises an iron U-shaped magnetic yoke, an armature and a third elastic piece, wherein an annular conductive coil is wound on the iron U-shaped magnetic yoke, and the third elastic piece is arranged in a limit groove on the insulating shell.

Preferably, the armature is provided with a rotating shaft hole which is hinged with the rotating shaft hole on the insulating shell through a rotating shaft, one end of the armature is provided with a first pressing plate and a second pressing plate, and the first pressing plate is always pressed at one end of the third elastic part.

Preferably, the magnetic tripping system comprises a screw coil, a bushing, a movable iron core, a static iron core and an iron core spring.

Preferably, the thermal trip system comprises a bimetallic conductor and a flexible conductor, and the bimetallic conductor is electrically connected with one end of the annular conductive coil through the flexible conductor.

Preferably, a fourth elastic piece is arranged in the insulating shell, the fourth elastic piece is sleeved on the fixed shaft, one end of the fourth elastic piece abuts against a limiting boss of the insulating shell, and the other end of the fourth elastic piece abuts against a limiting boss supported by the contact.

Preferably, the arc extinguishing system still contains first striking air flue, first striking air flue is "L" shape setting along the left side and the below of first explosion chamber, and its gas outlet setting is in first explosion chamber below.

The invention has the following beneficial effects:

the plug-in circuit breaker provided by the invention improves the operability of wiring and replacement of the circuit breaker in a narrow space. And moreover, 1P + N structural layout is realized within the width of 18mm, and various indexes are not reduced. In addition, the contact structure of the circuit breaker is provided with the rotary double-breakpoint moving contact system, so that the circuit breaker has higher breaking capacity than other similar products in the same volume, and the reliability of the product is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is an overall external view of a first embodiment of the circuit breaker of the present invention.

Fig. 2 is a schematic diagram of an internal structure of the circuit breaker according to the first embodiment of the present invention in an open state.

Fig. 3 is a schematic view of the overall structure of a rotary double-break moving contact system according to a first embodiment of the circuit breaker of the present invention.

Fig. 4 is an exploded view of a rotary double break point moving contact system according to a first embodiment of the circuit breaker of the present invention.

Fig. 5 is a schematic diagram of a magnetic trip system of a first embodiment of the circuit breaker of the present invention.

Fig. 6 is a schematic diagram of a thermal trip system of a first embodiment of the circuit breaker of the present invention.

Fig. 7 is a schematic diagram of the operating system of the first embodiment of the circuit breaker of the present invention.

Fig. 8 is a schematic diagram of a trip assembly of the first embodiment of the circuit breaker of the present invention.

Fig. 9 is a schematic view of the internal structure of the insulating housing of the first embodiment of the circuit breaker of the present invention.

Fig. 10 is a schematic diagram of an internal structure of the circuit breaker in a closed state according to the first embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a second embodiment of the circuit breaker according to the present invention in an open state.

Fig. 12 is a schematic structural diagram of a breaker according to a third embodiment of the present invention in an open state.

Fig. 13 is a schematic view of a contact support structure according to a third embodiment of the present invention.

Fig. 14 is a schematic view of an overall structure of a rotary double-break movable contact according to a third embodiment of the present invention.

Fig. 15 is an exploded view of a rotary double-break moving contact system according to a third embodiment of the present invention.

Fig. 16 is a schematic structural diagram of a closing state of the circuit breaker according to the third embodiment of the present invention.

Fig. 17 is a schematic diagram of the overall structure of the first embodiment coil solution of the circuit breaker of the present invention.

Fig. 18 is a schematic diagram of the internal structure of the coil of the first embodiment of the circuit breaker of the present invention.

Fig. 19 is a schematic structural diagram of a circuit breaker according to a fourth embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

First embodiment

As shown in fig. 1 to 8, the present embodiment discloses a circuit breaker, where the circuit breaker includes an insulating housing 100, an operating system 200, a rotating double-break-point moving contact system 300, a static contact system 400, a magnetic trip system 500, a thermal trip system 600, an arc extinguishing system 700, a trip assembly 800, and a conductor 900, where the insulating housing 100 includes a first housing 110 and a second housing 120 that are sequentially arranged in parallel, and the operating system 200, the rotating double-break-point moving contact system 300, the static contact system 400, the magnetic trip system 500, the thermal trip system 600, the arc extinguishing system 700, the trip assembly 800, and the conductor 900 are disposed in the insulating housing 100 that is formed by the first housing 110 and the second housing 120 together.

The operating system 200 may drive the rotating double-break point moving contact system 300 to contact with or separate from the fixed contact system 400, so as to achieve connection or disconnection of a circuit, the rotating double-break point moving contact system 300 includes a first moving contact 321 and a second moving contact 322, the fixed contact system 400 includes a first fixed contact 410 and a second fixed contact 420, the first fixed contact 410 and the second fixed contact 420 are arranged oppositely, the first fixed contact 410 is matched with the first moving contact 321, the second fixed contact 420 is matched with the second moving contact 322, the arc extinguishing system 700 includes a first arc extinguishing chamber 710 and a second arc extinguishing chamber 720, the first arc extinguishing chamber 710 and the second arc extinguishing chamber 720 are arranged oppositely and are respectively located at two sides of the circuit breaker, and the first arc extinguishing chamber 710 is arranged corresponding to the first fixed contact 410 and the first moving contact 321, and is used for eliminating an arc generated when the first fixed contact 410 and the first moving contact 321 are disconnected, the second arc extinguish chamber 720 is disposed corresponding to the second fixed contact 420 and the second movable contact 322, and is configured to eliminate an arc generated when the second fixed contact 420 and the second movable contact 322 are disconnected. The arc extinguishing system 700 further includes a first arc striking gas passage 730 and a second arc striking gas passage 740 for discharging high-temperature gas, which is generated when the gas is cut off, ejected from the first arc extinguishing chamber 710 and the second arc extinguishing chamber 720. Preferably, the first arc-striking gas channel 730 is substantially L-shaped along the left side of the first arc-striking chamber 710, i.e., the side and the lower side of the first arc-striking chamber 710 far away from the rotating double-break point moving contact system 300, and finally high-temperature gas is exhausted below the first arc-striking chamber 710, so that the high-temperature gas is prevented from being exhausted from the side of the operating panel of the circuit breaker, the personal safety of a user is protected, and in addition, the first arc-striking gas channel 730 is L-shaped, so that the cooling of the high-temperature gas is accelerated, and zero arcing is realized. The second arc ignition air passage 740 is arranged on one side, away from the rotating double-breakpoint moving contact system 300, of the second arc extinguishing chamber 720, and is arranged in a labyrinth manner, and the second arc ignition air passage 740 has the same effect as the first arc ignition air passage 730, so that zero arcing can be realized.

When the main circuit is connected, and when an overcurrent occurs in the main circuit, the thermal trip system 600 executes an action, specifically, the bimetallic conductor in the thermal trip system 600 may deform due to heating and may drive the trip assembly 800 to rotate when bending to a certain extent, and the trip assembly 800 may toggle the operating system 200 to move after contacting with the operating system 200, so as to unlock the operating system 200, so that the rotary double-break movable contact system 300 is separated from the static contact system 400, thereby playing a role in overload protection of circuits and electrical equipment.

Similarly, when a fault such as a short circuit occurs in the main circuit, a large short-circuit current may occur in the main circuit, and at this time, the magnetic trip system 500 may trigger an action to unlock the operating system 200, so that the rotating double-break moving contact system 300 is separated from the stationary contact system 400, thereby implementing a short-circuit protection function of the circuit breaker on a line or an electrical device.

A soft conductor 620 is connected between the thermal trip system 600 and the magnetic trip system 500, two ends of the soft conductor 620 are respectively connected to the thermal trip system 600 and the magnetic trip system 500, the thermal trip system 600 and the magnetic trip system 500 are arranged close to each other and above the second arc-extinguishing chamber 720, and after being electrically connected with the second fixed contact 420, the thermal trip system can be connected with or disconnected from the rotary double-breakpoint movable contact system 300, that is: the magnetic trip system 500, the thermal trip system 600 and the second stationary contact 420 form a series connection; the second fixed contact 420 is disposed below the trip assembly 800, the first movable contact 321, and the second arc extinguish chamber 720, the operating system 200 is disposed above the first fixed contact 410, and the operating system 200, the magnetic trip system 500, and the thermal trip system 600 are disposed on the same side and are all disposed above the insulating housing 100.

Specifically, in this embodiment, as shown in fig. 2, 4 and 7, the operating system 200 is of a button type, the operating system 200 includes a handle 210, a first link 220, an adaptor 230, a latch 240, a second link 250 and a fifth elastic member 260, an end of the handle 210 is disposed at one side of the circuit breaker, two ends of the first link 220 are respectively connected to the handle 210 and the adaptor 230, and when the handle 210 is manually pressed, the adaptor 230 can rotate around a rotating shaft 201 under the driving of the first link 220. The lock 240 is hinged to the adaptor 230 via the shaft 202. One end of the second link 250 is disposed in the positioning shaft hole of the latch 240, the other end is disposed in the waist-round hole 314 of the contact support 310, and one end of the second link 250 is freely slidable in the waist-round hole 314. One end of the fifth elastic member 260 is fixed to the insulating housing 100, and the other end is connected to the latch 240.

Referring to fig. 2 to 4, the rotary double-break contact system 300 includes a contact holder 310, a movable contact bridge 320, a first elastic member 330 and a second elastic member 340, the contact holder 310 is rotatably connected to the insulating housing 100, a positioning post 315 is disposed on the contact holder 310, the positioning post 315 is coaxial with a rotation center 311 of the contact system 300, the rotation center 311 is connected to two sides of the insulating housing 100 through a fixing shaft 111, the rotation center 311 is hinged to the fixing shaft 111, a through hole for receiving the fixing shaft 111 to pass through is disposed on the positioning post 315, and preferably, the fixing shaft 111 is integrally formed with the insulating housing 100. Of course, besides the above implementation manners, the fixing shaft 111 may also be formed non-integrally with the insulating housing 100, and may be embodied in the form of a device or support formed non-integrally with the insulating housing 100, as long as the movable installation of the contact system 300 is realized. The movable contact bridge 320 is sleeved on the positioning column 315, a kidney-shaped hole 325 matched with the positioning column 315 is arranged on the movable contact bridge 320, the movable contact bridge 320 can move in the range of the kidney-shaped hole 325 relative to the contact support 310, a first movable contact 321 and a second movable contact 322 are respectively arranged at two ends of the movable contact bridge 320, the first movable contact 321 and the second movable contact 322 are respectively matched with a first fixed contact 410 and a second fixed contact 420 of the fixed contact system 400, a clamping groove 316 is arranged on the contact support 310, and the movable contact bridge 320 is clamped in the clamping groove 316, so that the movable contact bridge 320 and the contact support 310 can be installed. First elastic component 330 with second elastic component 340 sets up relatively, and locates respectively the both sides that the contact supported 310 be equipped with first spacing groove 312 and second spacing groove 313 on the contact supported 310, first elastic component 330 with second elastic component 340 is located respectively first spacing groove 312 with in the second spacing groove 313, first elastic component 330 with the one end of second elastic component 340 all with the contact supports 310 and contradicts, and the other end is established respectively on first location boss 323 and the second location boss 324 on the movable contact bridge 320 and with the movable contact bridge 320 contradicts.

Further, a fourth elastic member 350 is disposed in the insulating housing 110, the fourth elastic member 350 is sleeved on the fixed shaft 111, one end of the fourth elastic member 350 abuts against the limit boss 113 of the insulating housing 110, and the other end abuts against the limit boss 314 of the contact support 310.

Referring to fig. 2, 5 and 9, the magnetic trip system 500 includes an iron U-shaped magnetic yoke 510, an armature 520 and a third elastic member 530, the iron U-shaped magnetic yoke 510 is fixedly connected to the insulating housing 100, a ring-shaped conductive coil 511 is wound on the iron U-shaped magnetic yoke 510, one end of the third elastic member 530 is disposed in a limiting groove 112 on the insulating housing 110, a rotation shaft hole 521 is disposed on the armature 520, the rotation shaft hole 521 and the rotation shaft hole 116 on the insulating housing 110 are correspondingly disposed and hinged through a rotation shaft 540, one end of the armature 520 is disposed with a first pressing plate 522 and a second pressing plate 523, and the first pressing plate 522 is pressed against the other end of the third elastic member 530.

In another preferred embodiment, the magnetic trip system 500 may also be composed of a screw coil 561, a bushing 562, a movable iron core 563, a stationary iron core 564, and an iron core spring 565. The iron core spring 565 is sleeved on the movable iron core 563, and then sleeved with the movable iron core 563 and the static iron core 564 in the bushing 562 to form an iron core assembly 560, and the iron core assembly 560 is sleeved in the screw coil 561 along a central line of the screw coil 561 to form another magnetic tripping system 500 related to the present invention.

Referring to fig. 6, the thermal trip system 600 includes a bimetal conductor 610 and a flexible conductor 620, the bimetal conductor 610 is electrically connected to one end 511a of the annular conductive coil 511 through the flexible conductor 620, and one end of the bimetal conductor 610 is connected to the stationary contact bar 421 of the second stationary contact 420.

Referring to fig. 8, the trip assembly 800 includes a trip buckle 810, one end of the trip buckle 810 is in contact with or separated from the lock buckle 240, the lock buckle 240 is provided with a second contact surface 242 which is oppositely arranged and is in contact with the trip buckle 810, and the trip buckle 810 is provided with a third contact surface 811 which can be in contact with the second pressing plate 523, a fourth contact surface 812 which can be in contact with the second contact surface 242, and a fifth contact surface 813 which can be in contact with the contact surface 611 of the bimetal conductor 610.

In a preferred embodiment, at least one end of the circuit breaker is provided with a terminal 550, and the specific implementation form of the terminal 550 can be a screw-fastening type terminal, a plug-in type terminal, or a combination of the two. The screw fastening type wiring end is in a form of combining a screw and a wiring frame, and an external conductor extends into the wiring frame and is fastened through the screw to realize the conduction of a circuit; the plug-in terminal, i.e. the external conductor, is connected to the plug-in terminal in a pluggable manner to achieve circuit conduction, and the specific implementation manner of the plug-in terminal may be a plug, a collet or a clip, which is not limited herein.

The conductor 900 is arranged below the rotary double-breakpoint moving contact system 300 and is arranged in an insulating mode with the rotary double-breakpoint moving contact system 300, one end of the conductor 900 is connected with a power supply inlet wire end of the circuit breaker, and the other end of the conductor 900 is connected with a power supply outlet wire end of the circuit breaker, so that the direct connection of an N-pole circuit is achieved.

The specific movement process of the circuit breaker is described in detail below with reference to the accompanying drawings:

as shown in fig. 2, 3, 4 and 7, when the circuit breaker is in an initial opening position, and the handle 210 is manually pressed, the handle 210 drives the first link 220 to push the adaptor 230, so that the adaptor 230 rotates around the rotating shaft 201. Because the connection point of the latch 240 and the rotary double-break-point moving contact system 300 is located on the right side of the connection line between the rotation center of the adaptor 230 and the rotation center of the rotary double-break-point moving contact system 300, and the dotted line shown in fig. 2 is the connection line between the rotation center of the adaptor 230 and the rotation center of the rotary double-break-point moving contact system 300, when the handle 210 is pushed by an external force, the adaptor 230 rotates counterclockwise, so that the latch 240 pushes the second link 250 to have a tendency of moving rightward, because the second link 250 is limited in the kidney-shaped hole 314 of the contact support 310, when the second link 250 moves rightward to a certain distance, the second link 250 contacts the side wall of the kidney-shaped hole 314, and the handle 210 continues to move toward the inside of the circuit breaker under the continuous action of the external force, at this time, the second link 250 pushes the moving contact support 310, and then the whole rotary double-breakpoint moving contact system 300 is driven to rotate clockwise around the fixed shaft 111. As the rotating double-break movable contact system 300 rotates, the first movable contact 321 and the second movable contact 322 respectively start to approach the first stationary contact 410 and the second stationary contact 420 until they are completely contacted. After the two sets of contacts are contacted, because the handle 210 has not moved to the closing braking point 114, the handle 210 continues to move inside the circuit breaker under the action of the external force until the center of the rotating shaft 202 moves through the line (i.e., the dead point) between the center of the rotating shaft 201 and the center of the second connecting rod 250, the handle 210 contacts with the closing braking point 114, the handle 210 stops moving, and at this time, the circuit breaker is closed completely, as shown in fig. 10. The latch 240 and the second link 250 remain relatively stationary throughout the closing process. After the two sets of moving and static contacts are contacted, the contact support 310 continues to move clockwise around the fixed shaft 111, so the first elastic element 330 and the second elastic element 340 form a pressing force on the moving contact bridge 320 to rotate around the rotation center 311. However, the first moving contact 321 and the second moving contact 322 at the two ends of the moving contact bridge 320 are respectively restricted by the first fixed contact 410 and the second fixed contact 420, a final pressure of the circuit breaker is formed between the two sets of moving and fixed contacts, and since there is a problem that the two sets of moving and fixed contacts are stressed unevenly during the movement of the mechanism, thereby affecting the performance of the circuit breaker, the kidney-shaped hole 325 is provided on the moving contact bridge 320, so that the stress distribution condition of the two sets of moving and fixed contacts can be automatically adjusted after the two sets of moving and fixed contacts are stressed at the final pressure, so as to achieve a state that the two sets of moving and fixed contacts are stressed evenly, and the external force applied to the handle 210 needs to overcome the counter force of the fourth elastic element 350.

As shown in fig. 2, 7 and 3, when the circuit breaker is in a switching-on position, the handle 210 is manually pulled to drive the handle 210 to move toward the outside of the circuit breaker, and the first link 220 is driven by the handle 210 to move leftward, and simultaneously, the adaptor 230 is pulled to rotate clockwise. When the center of the rotation shaft 202 passes through the dead point, the fifth elastic element 260 provides power for the rotation of the adaptor 230. At the same time, because the second link 250 moves to the left, the rotary double-break moving contact system 300 is also caused to rotate counterclockwise around the rotating shaft 201. The fourth elastic element 350 provides power for the counterclockwise rotation of the rotary double-break point moving contact system 300, and due to the unlocking of the mechanism, the first elastic element 330 and the second elastic element 340 which are squeezed before are released until the handle 210 moves to the opening braking point 115, and the mechanism finishes moving.

As shown in fig. 2 to 8, due to the short circuit, the magnetic trip system 500 starts to work, so that the circuit breaker is tripped quickly, and the specific implementation is as follows: when the circuit breaker is in a switching-on position and the current of a circuit where the circuit breaker is located suddenly rises to a set tripping current, the current passes through the annular conductive coil 511, due to the electromagnetic induction principle, the iron U-shaped magnetic yoke 510 generates a magnetic field, and the armature 520 above the iron U-shaped magnetic yoke 510 starts to rotate anticlockwise around the shaft 540 under the action of the magnetic field. Because the first pressing plate 522 presses the third elastic member 530 all the time, when the armature 520 starts to rotate, the electromagnetic attraction force generated by the iron U-shaped yoke 510 to the armature 520 is greater than the pressure applied to the third elastic member 530, so that the armature 520 cannot rotate counterclockwise, the second pressing plate 523 follows the armature 520 to move counterclockwise until contacting with the first contact surface 811 of the trip 810, the trip 810 rotates clockwise as the second pressing plate 523 continues to move, then the fourth contact surface 812 of the trip 810 contacts with the second contact surface 242 of the latch 240, at which time the latch 240 rotates around the rotating shaft 202, because the second link 250 is constrained in the kidney-shaped slot 314 of the contact holder 310, when the latch 240 rotates, the first contact surface 241 of the latch 240 separates from the second link 250, the stable state of the operating system 200 is broken, the mechanism is unlocked, and the two groups of moving and static contacts are quickly separated, so that the purpose of opening the breaker is achieved.

In another short circuit trip scheme, as shown in fig. 17 and 18, the magnetic trip system 500 employs a screw coil 561 plus core assembly 560 to drive the trip device 810 to trip. The specific implementation scheme is as follows: when a short-circuit large current flows through the screw coil 561, the screw coil 561 generates a magnetic field due to electromagnetic induction, the magnetic field attracts the movable iron core 563 in the iron core assembly 560 to act, and then the movable iron core 563 overcomes the counterforce of the iron core spring 565 to approach the stationary iron core 564 finally until contacting. One end 563a of the movable iron core 563 may contact one end 810a of the trip buckle 810, so when the movable iron core 563 moves to the right, the trip buckle 810 will rotate clockwise under the driving of the end 563a of the movable iron core 563, and the purpose of tripping the circuit breaker can also be achieved.

As shown in fig. 2, fig. 6 and fig. 8, due to the overload of the circuit, the thermal trip system 600 starts to operate to trip the circuit breaker, and the specific implementation is as follows: when the current magnitude that the circuit flows through is in the setting range value that circuit breaker overload delay was tripped, bimetal conductor 610 itself has the resistance, flows through behind the electric current bimetal conductor 610 is heated and is crooked, bimetal conductor 610 is because the coefficient of expansion that is heated of two kinds of metals is different, bimetal conductor 610's contact surface 611 begins the downwarping, until with the contact of fifth contact surface 813 of jump knot 810, along with bimetal conductor 610's continuous bending, bimetal conductor 610's contact surface 611 can drive jump knot 810 does clockwise rotation equally to reach the mesh of tripping the circuit breaker.

Second embodiment

Referring to fig. 11, this embodiment describes another circuit breaker operating system, in this embodiment, the operating system 200 is in a swing type, unlike the first embodiment, the swing type operating system of this embodiment is different from the button type operating system only in the arrangement of the handle 210, and in this embodiment, the handle 210 is hinged to the insulating housing 110 through a rotating shaft 203. When the circuit breaker is manually operated to be switched on, the circuit breaker can be switched on as long as external force pulls the handle 210 to rotate clockwise. When the breaker is manually operated to be opened, the breaker can be opened as long as the handle 210 is pulled by external force to rotate anticlockwise. When the circuit breaker does the opening and closing movement, the action principle of the internal mechanism is consistent with that described in embodiment 1, and the description is omitted here.

Third embodiment

Referring to fig. 12 to 16, as described above, in both the first embodiment and the second embodiment, the rotating double-break movable contact system 300 rotates clockwise around the fixed shaft 111 during closing; during opening, the rotating double-breakpoint moving contact system 300 rotates counterclockwise around the fixed shaft 111. The present embodiment describes a circuit breaker structure in which the rotation direction of the rotating double-break point moving contact system 300 is opposite to that of the first embodiment and the second embodiment, and the main difference is that the present embodiment includes a latch 820, and a connection point of the latch 820 and the rotating double-break point moving contact system 300 is located on the left side of a connection line between the rotation center of the adaptor 230 and the rotation center of the rotating double-break point moving contact system 300, as shown in fig. 12. Namely, when the switch is switched on, the rotating double-breakpoint moving contact system 300 rotates clockwise and anticlockwise around the fixed shaft 111; during opening, the rotating double-break moving contact system 300 rotates clockwise around the fixed shaft 111, and the reverse is true in the first embodiment.

The specific implementation scheme is as follows: the first link 220 is hinged to the handle 210 and the adaptor 230 through two bent pins, and since the hinge point between the first link 220 and the adaptor 230 is located above the rotating shaft 201, when the handle 210 is pushed by the external force to move towards the inside of the circuit breaker, the adaptor 230 rotates clockwise around the rotating shaft 201. The contact support 310 is provided with a first positioning column 317, a second positioning column 318 and a limiting groove 310a, the first positioning column 317 is provided with a lock catch 820, the lock catch 820 is sleeved on the first positioning column 317 and can rotate around the first positioning column 317, and the lock catch 820 is rotatably connected with the second connecting rod 250; the second positioning post 318 is provided with a jump buckle 830, the jump buckle 830 is sleeved on the second positioning post 318 and can rotate around the second positioning post 318, and the limiting groove 310a is provided with a sixth elastic member 360. The adaptor 230 is connected with the latch 820 through the second connecting rod 250, a first buckle surface 821 is arranged on the latch 820, a second buckle surface 831 is arranged on the jump buckle 830, the first buckle surface 821 and the second buckle surface 831 can be in contact or separated, and a limiting column 832, a third buckle surface 833 and a fourth buckle surface 834 are further arranged on the jump buckle 830. The sixth elastic element 360 is disposed in the limiting groove 310a, one end of the sixth elastic element 360 is sleeved on the limiting post 832, and the jump buckle 830 presses the sixth elastic element 360 all the time.

When the adaptor 230 rotates clockwise, the second link 250 moves downward and drives the latch 820 to move. Since the first latch surface 821 of the latch 820 and the second latch surface 831 of the jumper 830 are always in contact in the initial state, and the latch 820 and the jumper 830 are disposed on the positioning column of the contact holder 310, the latch 820, the jumper 830, and the contact holder 310 are relatively stationary. When the second connecting rod 250 moves downwards, the rotating double-break-point moving contact system 300 is driven to start to rotate around the fixed shaft 111, and because the hinge point between the second connecting rod 250 and the lock 820 is located on the left side of the connecting line of the circle centers of the fixed shaft 111 and the rotating shaft 201, when the second connecting rod 250 moves downwards, the rotating double-break-point moving contact system 300 rotates counterclockwise until the rotating double-break-point moving contact system 300 is in contact with the fixed contact system 400. When the external force continues to push the handle 210 to move towards the inside of the circuit breaker, when the second connecting rod 250 and the hinge point of the adapter 230 rotate through the first positioning column 317 and the connection line (i.e. dead point) of the circle center of the rotating shaft 201, and after the handle 210 touches the closing braking point 114, the circuit breaker mechanism is in a stable structure, and the circuit breaker is closed completely.

When the circuit breaker is in the closing position and a short circuit occurs, as described above, the armature 520 is attracted by the magnetic yoke 510 and overcomes the counterforce of the third elastic member 530, the armature 520 rotates counterclockwise around the rotating shaft 540, the second pressing plate 523 contacts with the fourth snapping surface 834 of the jumper 830, the jumper 830 starts to rotate clockwise around the second positioning post 318, because the first snapping surface 821 of the latch 820 and the second snapping surface 831 of the jumper 830 are snapped at this time, and because the first snapping surface 821 and the second snapping surface 831 start to separate under the driving of the armature 520, the stable structure of the circuit breaker is broken, and the rotating double-breakpoint system 300 starts to rotate clockwise under the action of the fourth elastic member 350 until the limiting surface 231 on the adaptor 230 contacts with the limiting post 117 on the insulating housing 110, and the opening of the breaker is finished. When the adaptor 230 returns to the original position, the first buckle surface 821 of the buckle 820 can be buckled with the second buckle surface 831 of the trip buckle 830 again to prepare for the next closing.

The thermal overload tripping action process of the circuit breaker comprises the following steps: the thermal overload operation is to separate the first buckle surface 821 and the second buckle surface 831 by driving the third buckle surface 833 of the trip buckle 830 through the bimetal conductor 610, and the operation process is the same as the short circuit tripping operation, and is not described again.

Fourth embodiment

Referring to fig. 19, in this embodiment, another form of circuit breaker is disclosed, in this embodiment, the movable contact system 300a includes a third movable contact 321a and a fourth movable contact 322a, the third movable contact 321a and the fourth movable contact 322a are respectively disposed at two sides of a rotation center of the movable contact system 300a, the stationary contact system 400a includes a third stationary contact 410a and a fourth stationary contact 420a, the third movable contact 321a and the third stationary contact 410a are correspondingly disposed, the fourth stationary contact 420a and the fourth movable contact 322a are correspondingly disposed, one end of the third stationary contact 410a is electrically connected to the third movable contact 321a, the other end of the third stationary contact is electrically connected to a power line inlet terminal 550a, one end of the fourth stationary contact 420a is electrically connected to the fourth movable contact 322a, the other end of the fourth stationary contact is electrically connected to a power line outlet terminal 550b, the power line inlet 550a, the power line outlet 550a, The third fixed contact 410a, the third movable contact 321a, the fourth movable contact 322a, the fourth fixed contact 420a, and the power outlet terminal 550b form a complete current loop, the power inlet terminal 550a and the power outlet terminal 550b are disposed on the same side of the circuit breaker, and are located on the side opposite to the handle 210, and are different from the first embodiment in that the power inlet terminal and the power outlet terminal are respectively disposed on two sides of the circuit breaker.

In this embodiment, power inlet wire end 550a and power outlet terminal 550b follow the direction of height of circuit breaker is the echelonment and arranges, and the benefit of so setting is that, when the circuit breaker during operation, power inlet wire end 550a and power outlet terminal 550 b's wiring copper bar can produce a large amount of heats, and the arrangement of echelonment can provide great heat dissipation space for the wiring copper bar, is favorable to the heat dissipation of product to can improve the electric life of product.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.