CN208352218U

CN208352218U - Miniature circuit breaker

Info

Publication number: CN208352218U
Application number: CN201820099350.1U
Authority: CN
Inventors: 夏晓敏; 黄东林
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2018-01-19
Filing date: 2018-01-19
Publication date: 2019-01-08
Anticipated expiration: 2028-01-19

Abstract

A kind of miniature circuit breaker, the pole L breaker and the pole N breaker including linkage, bracket and the pole N moving contact are equipped in the shell of the pole N breaker, the bracket includes substrate, bending part and contact part, silver point and wire connecting portion are equipped in contact part, the silver point is mounted in contact part and is oppositely arranged with the pole N moving contact, the wire connecting portion is arranged in contact part and is connected close to the side of substrate and with one end of the conducting wire of the pole N breaker, and the other end of the conducting wire is connected with the connecting terminal of the pole N breaker.The structure that the utility model passes through the bracket of the improvement pole N breaker, by at position of the bracket close to silver point setting be used for the wire connecting portion of connecting wire, so that conducting wire has enough areas to can connect near silver point, the distance of bracket is flowed through so as to shorten the electrical current of the pole N breaker, the calorific value of bracket and the temperature of breaker are reduced, the energy consumption of breaker is reduced.

Description

Miniature circuit breaker

Technical field

The utility model relates to Low Voltage Electrical Apparatus, especially a kind of miniature circuit breaker.

Background technique

The pole N for only connecing zero curve is typically provided in multipole setting miniature circuit breaker, which, which is divided into, can cut-off and can not open Disconnected two types, can be equipped with supporting structure in the miniature circuit breaker that the pole N can be cut-off in most of breaker, and by Static contact part of the silver point as breaker is welded on bracket.However, the circuit knot for the miniature circuit breaker that can be cut-off in the existing pole N In structure, electric current can flow through entire supporting structure, cause circuit breaker internal temperature to increase, and make the consumption of breaker in the line It can be also corresponding higher.

Utility model content

The purpose of the utility model is to overcome the defect of the prior art, provide a kind of structure is simple, temperature is lower, energy consumption Less miniature circuit breaker.

To achieve the above object, the utility model adopts the technical scheme that

A kind of miniature circuit breaker, the pole L breaker and the pole N breaker including linkage, is equipped in the shell of the pole L breaker Electromagnetic system 24 and bimetallic element 23 are equipped with bracket 2 and the pole N moving contact, the bracket 2 in the shell of the pole N breaker Including substrate 201, bending part 202 and contact part 203, the bending part 202 and contact part 203 are separately positioned on substrate 201 Both ends, be equipped with silver point 1 and wire connecting portion 3 in contact part 203, the silver point 1 is mounted in contact part 203 and extremely dynamic with N Contact is oppositely arranged, and conducting wire of the contact part 203 close to the side of substrate 201 and with the pole N breaker is arranged in the wire connecting portion 3 5 one end is connected, and the other end of the conducting wire 5 is connected with the connecting terminal 21 of the pole N breaker.

Preferably, including arranged side by side multiple poles L breaker and the pole a N breaker, pass through partition 11 between every pole Interval, which is arranged, simultaneously realizes linkage by STATEMENT OF FEDERALLY SPONSORED 8, and it is extremely breaking so as to form N in the side of partition 11 to be equipped with cover board 19 The shell structure of device is equipped with handle hole on cover board 19, door 13 is equipped on handle hole.

Preferably, the bracket 2 is installed in the shell of the pole N breaker by bending part 202 and substrate 201, Bracket 2 further includes striking portion 204, and the striking portion 204 is connected with contact part 203 and the arc-chutes 20 with the pole N breaker It is oppositely arranged, the one end in striking portion 204 extends to the bottom of substrate 201 between the second connecting portion 232 of contact part 203 Form the arc leading angle of V-type.

Preferably, the bending part 202 is arranged in Z-shaped and is connected with the side wall of 201 end of substrate, the touching Head 203 includes the first connecting portion 231 and second connecting portion 232 of L-shaped setting, one end of the first connecting portion 231 Be connected with the side wall of 201 end of substrate, the other end of first connecting portion 231 extend to the side far from bending part 202 and with One end of second connecting portion 232 is connected, and the other end of the second connecting portion 232 is connected with the one end in striking portion 204.

Preferably, the silver point 1 is mounted on the side wall of second connecting portion 232, and the described setting of wire connecting portion 3 is the It is connected on the side wall of one interconnecting piece 231 and with substrate 201, it is described to lead so as to form the plane domain for connecting wire 5 The connector 51 of 5 one end of line is connected with wire connecting portion 3 by welding, the handle of the other end of conducting wire 5 around to the pole N breaker The 7 lower section and side of the cover board 19 from the partition 11 of the pole N breaker far from the pole N breaker is connected with connecting terminal 21.

Preferably, the substrate 201 and first connecting portion 231 assume a " convex " shape structure setting, in first connecting portion 231 Two sides form notch, and the wire connecting portion 3 is rectangular configuration, and the corner of " convex " shape structure side is arranged simultaneously in wire connecting portion 3 It is concordant with the edge of substrate 201, so that the notch that first connecting portion 231 is equipped with 3 side of wire connecting portion is less than the notch of the other side.

Preferably, the end of the connector 51 is distance L at a distance from the side of 201 side of substrate with wire connecting portion 3, is connect First 51 end is distance H at a distance from the side of 203 side of contact part with wire connecting portion 3, and the length of the distance L is 1 milli Rice, the length of the distance H are 1 millimeter.The height of the bending part 202 is distance T, and the length of the distance T is 5.3 millis Rice.

Preferably, the bracket 2 is one of the forming structure, the bending part 202, contact part 203 and striking portion 204 by 201 bending forming of substrate.

Preferably, handle 7 is installed on the partition 11 of the pole N breaker, operating mechanism 10, connecting rod 14, conduct piece 15, is led Magnetic sheet 16, arc separating wall 17 and arc-chutes 20, the handle 7 by handle spring 6 be mounted on partition 11 one end and it is prominent every Plate 11 is arranged, and the contact that the pole the N moving contact is mounted on operating mechanism 10 supports that handle 7 drives N by operating mechanism 10 Pole moving contact contacts or separates with silver point 1 to realize the on-off of circuit, and the lower section of bracket 2 is arranged in the arc-chutes 20, The connecting terminal 21 is separately positioned on the two sides of partition 11 for wiring, and wherein the connecting terminal 21 of side passes through conduct piece 15 are connected with the pole N moving contact, and the connecting terminal 21 of the other side is connected by conducting wire 5 with bracket 2, and the magnetic conductive board 16 is set It sets in the lower section of the pole N moving contact, the arc separating wall 17 is arranged between silver point 1 and the pole N moving contact.

Preferably, the operating mechanism 10 includes U-shaped connecting rod 9, tripping, lock, contact is supported and lever, the thick stick Bar and contact support are articulated on partition 11, and lever is connected by torsional spring 12 with contact support, and the torsional spring 12 can be N The closure of pole moving contact and silver point 1 provides elastic contact force, the lock and tripping be articulated on lever and overlap cooperation from And releasably engageable mechanical locking structure is formed, the tripping is hinged by U-shaped connecting rod 9 and handle 7.

The miniature circuit breaker of the utility model in the pole the L breaker of miniature circuit breaker by being provided with for short-circuit protection Magnetic tripping mechanism and thermal tripping mechanism for overload protection, and since the electric current that the pole N breaker is born in disjunction is non- It is often small, therefore it is not provided with magnetic tripping mechanism and thermal tripping mechanism in the breaker of the pole N, to make the structure of entire miniature circuit breaker more Step up to gather, space utilization rate maximized, meanwhile, improve the pole N breaker bracket structure, by bracket close to silver point Position at setting be used for the wire connecting portion of connecting wire so that conducting wire has enough areas to can connect near silver point, from And the electrical current for shortening the pole N breaker flows through the distance of bracket, reduces the calorific value of bracket and the temperature of breaker, subtracts The energy consumption of breaker is lacked.In addition, the installation fixed function of reinforced support can be played by the way that bending part is arranged on bracket, So that bracket compared with strong pressure or because of high temperature generation case material when by slightly melting, bending part is capable of providing more resistances To prevent bracket to be displaced, the reliability of the pole N breaker ensure that.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the utility model；

Fig. 2 is the structural schematic diagram of the pole the N breaker of the utility model；

Fig. 3 is the structural schematic diagram of the bracket of the utility model；

Fig. 4 is the bracket of the utility model and the attachment structure schematic diagram of conducting wire；

Fig. 5 is the bracket of the utility model and the assembling structure schematic diagram of conducting wire；

Fig. 6 is the structural schematic diagram of the pole the L breaker of the utility model.

Specific embodiment

The embodiments of the present invention are provided below in conjunction with attached drawing 1 to 6, further illustrate the small-sized open circuit of the utility model Implement body embodiment.The miniature circuit breaker of the utility model is not limited to the following description.

As shown in Fig. 1 to 3 and 6, the miniature circuit breaker of the utility model includes the pole the L breaker to link and N extremely breaking Device is equipped with the bimetallic element 23 for the electromagnetic system 24 of electromagnetic trip and for thermal tripping in the shell of the pole L breaker, Bracket 2 and the pole N moving contact are equipped in the shell of the pole N breaker, the bracket 2 includes substrate 201, bending part 202 and touching Head 203, the bending part 202 and contact part 203 are separately positioned on the both ends of substrate 201, and silver is equipped in contact part 203 Point 1 and wire connecting portion 3, the silver point 1 are mounted in contact part 203 by welding and are oppositely arranged with the pole N moving contact As the pole N static contact, the wire connecting portion 3 be arranged in contact part 203 close to substrate 201 side and by welding with One end of the conducting wire 5 of the pole N breaker is connected, and the other end of the conducting wire 5 is connected with the connecting terminal 21 of the pole N breaker. When work, in the pole L, breaker makes miniature circuit breaker instantaneous trip by electromagnetic system 24 when short circuit occurs, and in the pole L, breaker exists Miniature circuit breaker delayed releasing is made by bimetallic element 23 when overheating, the pole N breaker is then the operating mode of make-before-break, Therefore the electric current that the pole N breaker is born in disjunction is very small.The utility model passes through in the pole the L breaker of miniature circuit breaker It is provided with for the magnetic tripping mechanism of short-circuit protection and for the thermal tripping mechanism of overload protection, and since the pole N breaker is dividing The electric current born when disconnected is very small, therefore is not provided with magnetic tripping mechanism and thermal tripping mechanism in the breaker of the pole N, to make entire The structure of miniature circuit breaker is more compact, and space utilization rate is maximized, meanwhile, the structure of the bracket 2 of the pole N breaker is improved, By the way that the wire connecting portion 3 for connecting wire 5 is arranged at the position of silver point 1 in bracket 2, so that conducting wire 5 has enough areas It can connect near silver point 1, the distance of bracket 2 flowed through so as to shorten the electrical current of the pole N breaker, reduces bracket 2 calorific value and the temperature of breaker, reduce the energy consumption of breaker.

Specifically, the miniature circuit breaker of the utility model includes that multiple poles L breaker and a N arranged side by side are extremely disconnected Road device is arranged between every pole by the interval of partition 11 and realizes linkage by STATEMENT OF FEDERALLY SPONSORED 8, and installed at the both ends of miniature circuit breaker There is cover board 19 so as to form the shell structure of the pole N breaker, is equipped on cover board 19 for tripping and the installation attachment of linking Handle hole be equipped on handle hole in order to avoid dust or other small articles enter circuit breaker internal by handle hole Door 13 can remove door 13 when needing to carry out attachment installation, and handle 7, behaviour are equipped on the partition 11 of the pole N breaker Make mechanism 10, connecting rod 14, conduct piece 15, magnetic conductive board 16, arc separating wall 17 and arc-chutes 20, the handle 7 passes through handle spring 6 It is mounted on one end of partition 11 and prominent partition 11 is arranged for operating, the pole the N moving contact is mounted on operating mechanism 10 On contact is supported, handle 7 drives the pole N moving contact to contact or separate with silver point 1 to realize the logical of circuit by operating mechanism 10 Disconnected, the lower section of bracket 2 is arranged in for arc extinguishing in the arc-chutes 20, and the connecting terminal 21 is separately positioned on partition 11 Two sides are used for wiring, and wherein the connecting terminal 21 of side is connected by conduct piece 15 with the pole N moving contact, the terminals of the other side Son 21 is connected by conducting wire 5 with bracket 2, and the lower section that the pole N moving contact is arranged in the magnetic conductive board 16 is used for striking, described Arc separating wall 17 be arranged between silver point 1 and the pole N moving contact for completely cutting off the electric arc generated when the pole N moving contact separates.

The operating mechanism 10 includes U-shaped connecting rod 9, tripping, lock, contact is supported and lever, the lever and touching Head is supported to be articulated on partition 11, and lever is connected by torsional spring 12 with contact support, and the torsional spring 12 can be the extremely dynamic touching of N The closure of head and silver point 1 provides elastic contact force, and the lock and tripping are articulated on lever and overlap cooperation to be formed Releasably engageable mechanical locking structure, the tripping are hinged by U-shaped connecting rod 9 and handle 7.

As shown in Figures 3 and 4, a specific embodiment of the bracket 2 of the utility model is that the bracket 2 further includes Striking portion 204, the striking portion 204 are connected with contact part 203 and are oppositely arranged with arc-chutes 20.Specifically, described Bracket 2 is installed in the shell of the pole N breaker by bending part 202 and substrate 201, and bending part 202 is arranged simultaneously in Z-shaped It is connected with the side wall of 201 end of substrate, the contact part 203 includes the first connecting portion 231 and second of L-shaped setting One end of interconnecting piece 232, the first connecting portion 231 is connected with the side wall of 201 end of substrate, first connecting portion 231 it is another One end extends to the side far from bending part 202 and is connected with one end of second connecting portion 232, the second connecting portion 232 The other end be connected with the one end in striking portion 204, the other end in the striking portion 204 extend to the bottom of substrate 201 to The arc leading angle of V-type is formed between second connecting portion 232 and is disposed adjacent with the arc quenching plate of arc-chutes 20 for striking, it is described Silver point 1 is mounted on the side wall of second connecting portion 232, the wire connecting portion 3 be arranged on the side wall of first connecting portion 231 and with Substrate 201 is connected, and so as to form the plane domain for connecting wire 5, the connector 51 of described 5 one end of conducting wire passes through welding Mode be connected with wire connecting portion 3, the lower section of the other end of conducting wire 5 around to handle 7 and side from partition 11 far from cover board 19 It is connected with connecting terminal 21.Preferably, in the prior art, substrate 201 and first connecting portion 231 generally assume a " convex " shape structure Setting, i.e. first connecting portion 231 are provided projectingly on the side wall of 201 end of substrate and the width of first connecting portion 231 is less than base The width of plate 201, the two sides of first connecting portion 231 form notch of the same size, and wire connecting portion 3 is arranged the utility model In the corner of " convex " shape structure side and concordant with the edge of substrate 201, a kind of " convex " shape structure of dislocation is formd, first The notch that interconnecting piece 231 is equipped with 3 side of wire connecting portion is less than the notch of the other side.The utility model is curved by being arranged on bracket 2 Folding part 202 can play the installation fixed function of reinforced support 2, so that bracket 2 occurs by compared with strong pressure or because of high temperature When case material slightly melts, bending part 202 is capable of providing more resistances to prevent bracket 2 to be displaced, and ensure that N is extremely breaking The reliability of device.

As shown in figure 5, electric current is flow in wire connecting portion 3 through connector 51 in the direction of arrow A from conducting wire 5, rear edge when being powered The direction of arrow A through first connecting portion 231, second connecting portion 232 and silver point 1 flow out so that electric current only flowed through on bracket 2 compared with Short distance, to reduce the calorific value of bracket 2.

Preferably, the bracket 2 is one of the forming structure, the bending part 202, contact part 203 and striking portion 204 are at a distance from the side of 201 side of substrate with wire connecting portion 3 by 201 bending forming of substrate, the end of the connector 51 Distance L, end and the wire connecting portion 3 of connector 51 are distance H at a distance from the side of 203 side of contact part, the distance L's Length is 1 millimeter, and the length of the distance H is 1 millimeter.The height of the bending part 202 is distance T, the length of the distance T At least 5 millimeters, be 5.3 millimeters to save plate preferably.In the prior art, the conducting wire 5 is typically welded to prop up On the bending part 202 of frame 2, so that electric current flows through the overwhelming majority of bracket 2, cause bracket 2 in the use process of breaker Middle persistent fever, breaker heating and energy consumption are higher, and the utility model is by being arranged the junction of conducting wire 5 and bracket 2 in silver It near point 1, and is not arranged on bending part 202, so that electric current flows through shorter distance on bracket 2 only to reduce bracket 2 calorific value, simultaneously as bending part 202 no longer needs welding lead 5, in the condition for the position-limiting action for guaranteeing bending part 202 Under, the volume of bending part 202 can be reduced as far as possible to reduce the consumable quantity of bending part 202, reduce bracket 2 at This.Certainly, it is contemplated that bending part 202 can also be not provided with, is only matched with partition 11 by substrate 201 by bracket 2 Limit, to further reduce the consumable quantity of bracket 2.

It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard To belong to the protection scope of the utility model.

Claims

1. a kind of miniature circuit breaker, the pole L breaker and the pole N breaker including linkage, it is characterised in that: the breaker in the pole L It is equipped with electromagnetic system (24) and bimetallic element (23) in shell, it is extremely dynamic that bracket (2) and N are equipped in the shell of the pole N breaker Contact, the bracket (2) include substrate (201), bending part (202) and contact part (203), the bending part (202) and Contact part (203) is separately positioned on the both ends of substrate (201), and silver point (1) and wire connecting portion (3), institute are equipped on contact part (203) The silver point (1) stated is mounted on contact part (203) and is oppositely arranged with the pole N moving contact, and the wire connecting portion (3) is arranged in contact Portion (203) close to substrate (201) side simultaneously be connected with one end of the conducting wire (5) of the pole N breaker, the conducting wire (5) it is another One end is connected with the connecting terminal (21) of the pole N breaker.

2. miniature circuit breaker according to claim 1, it is characterised in that: including arranged side by side multiple poles L breaker and One pole N breaker is arranged between every pole by partition (11) interval and realizes linkage by STATEMENT OF FEDERALLY SPONSORED (8), and in partition (11) side is equipped with cover board (19) so as to form the shell structure of the pole N breaker, and handle hole is equipped on cover board (19), Door (13) are installed on handle hole.

3. miniature circuit breaker according to claim 1, it is characterised in that: the bracket (2) by bending part (202) and Substrate (201) is installed in the shell of the pole N breaker；

Bracket (2) further includes striking portion (204), and the striking portion (204) is connected and extremely breaking with N with contact part (203) The arc-chutes (20) of device are oppositely arranged, and the one end of striking portion (204) extends to the bottom of substrate (201) thus and contact part (203) arc leading angle of V-type is formed between second connecting portion (232).

4. miniature circuit breaker according to claim 3, it is characterised in that: the bending part (202) is arranged simultaneously in Z-shaped It is connected with the side wall of substrate (201) end, the contact part (203) includes the first connecting portion (231) of L-shaped setting It is connected with one end of second connecting portion (232), the first connecting portion (231) with the side wall of substrate (201) end, first connects The other end of socket part (231) extends to the side far from bending part (202) and is connected with one end of second connecting portion (232), The other end of the second connecting portion (232) is connected with the one end of striking portion (204).

5. miniature circuit breaker according to claim 4, it is characterised in that: the silver point (1) is mounted on second connecting portion (232) on side wall, the wire connecting portion (3) is arranged on the side wall of first connecting portion (231) and is connected with substrate (201) It connects, so as to form the plane domain for being used for connecting wire (5), the connector (51) of described conducting wire (5) one end passes through the side of welding Formula is connected with wire connecting portion (3), the other end of conducting wire (5) around to the pole N breaker handle (7) lower section and from the pole N breaker Partition (11) be connected far from the side of cover board (19) of the pole N breaker with connecting terminal (21).

6. miniature circuit breaker according to claim 4, it is characterised in that: the substrate (201) and first connecting portion (231) structure setting is assumed a " convex " shape, forms notch in the two sides of first connecting portion (231), the wire connecting portion (3) is rectangle knot Structure, and wire connecting portion (3) setting is in the corner of " convex " shape structure side and concordant with the edge of substrate (201), so that first The notch that interconnecting piece (231) is equipped with wire connecting portion (3) side is less than the notch of the other side.

7. miniature circuit breaker according to claim 5, it is characterised in that: the end and wire connecting portion (3) of the connector (51) Distance close to the side of substrate (201) side is distance L, and the end and wire connecting portion (3) of connector (51) are close to contact part (203) The distance of the side of side is distance H, and the length of the distance L is 1 millimeter, and the length of the distance H is 1 millimeter；

The height of the bending part (202) is distance T, and the length of the distance T is 5.3 millimeters.

8. miniature circuit breaker according to claim 3, it is characterised in that: the bracket (2) is one of the forming structure, institute The bending part (202) stated, contact part (203) and striking portion (204) are by substrate (201) bending forming.

9. miniature circuit breaker according to claim 2, it is characterised in that: be equipped on the partition (11) of the pole N breaker Handle (7), operating mechanism (10), connecting rod (14), conduct piece (15), magnetic conductive board (16), arc separating wall (17) and arc-chutes (20), institute The handle (7) stated is mounted on one end of partition (11) by handle spring (6) and prominent partition (11) setting, the N are extremely moved The contact that contact is mounted on operating mechanism (10) supports that handle (7) drives the pole N moving contact and silver point by operating mechanism (10) (1) it contacts or separates to realize the on-off of circuit, the arc-chutes (20) are arranged in the lower section of bracket (2), and described connects Line terminals (21) are separately positioned on the two sides of partition (11) for wiring, and wherein the connecting terminal (21) of side passes through conduct piece (15) it is connected with the pole N moving contact, the connecting terminal (21) of the other side is connected by conducting wire (5) with bracket (2), and described leads The lower section of the pole N moving contact is arranged in magnetic sheet (16), and the arc separating wall (17) is arranged between silver point (1) and the pole N moving contact.

10. miniature circuit breaker according to claim 9, it is characterised in that: the operating mechanism (10) includes U-shaped connecting rod (9), tripping, lock, contact support and lever, the lever and contact support are articulated on partition (11), and lever passes through torsion Spring (12) is connected with contact support, and the torsional spring (12) can provide elastic connecting for the closure of the pole N moving contact and silver point (1) Touch, the lock and tripping, which are articulated on lever and overlap, to be cooperated to form releasably engageable mechanical locking structure, described Tripping it is hinged by U-shaped connecting rod (9) and handle (7).