JP4499890B2 - Circuit breaker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circuit breaker, and more particularly to a two-pole circuit breaker for the purpose of thinning.
[0002]
[Prior art]
In the conventional two-pole circuit breaker, the arrangement of the tripping devices including the contact portions of the two poles and the bimetal is arranged in parallel in the same direction with respect to the direction connecting the terminals on the power source side and the load side.
[0003]
[Problems to be solved by the invention]
In the above-described conventional two-pole circuit breaker, when the terminals are aligned on the same mounting surface in parallel, the thickness of each breaker in the juxtaposition direction is a contact portion for one pole and a tripping device. 2 times the thickness of the contactor, and the insulation thickness for insulation between the adjacent contact parts and the tripping device, and the dimensional margin with the wall surface for operating the contact part and the mechanism part is also required For example, the dimension in the juxtaposition direction connecting the ends when the juxtaposition is made cannot be reduced.
[0004]
Also, abnormal current flows through the circuit breaker, and the gas that contains metal vapor spreads inside the circuit breaker due to the arc that is generated when the contact is opened, and the splashes adhere to the tripping device and mechanism, causing the tripping operation. There were problems such as obstruction and poor insulation between the poles.
[0005]
Therefore, an object of the present invention is to obtain a thin two-pole circuit breaker that can reduce the end-to-end dimensions when the terminal positions are arranged in parallel on the same mounting surface, and An object of the present invention is to provide a two-pole circuit breaker that prevents the tripping operation by the arc gas at the time of interrupting the current and has little insulation deterioration between the electrodes.
[0006]
[Means for solving problems]
In order to achieve the above-described object, claim 1 includes a case, an operation handle for turning on and off the contact device in conjunction with the opening and closing mechanism, a fixed contact that is fixed to the case and provided with a fixed contact, It consists of a stationary contact and a pair direction and the movable contact having a movable contact disposed, a rotating member movable contact mounted holding said movable contact is thereby toward and away from rotating relative to the fixed contact, abnormal A tripping device that opens the movable contact from the fixed contact by acting on the open / close mechanism with an electric current, and operates when the tripping device is actuated to open and close the movable contact and the fixed contact by operating the operation handle. In a two-pole circuit breaker provided with an opening / closing mechanism that acts on a rotating member so as to forcibly open a contact regardless of whether or not a contact closing operation is restricted by a handle, the movable contact of each pole is provided on the rotating member. Center of rotation And it extends et substantially opposite directions, the movable contact is located from the pivot member to the outside on the movable contact child, in which the rotating member moving contact with the rolling to Turkey is separable a fixed contact, In addition, a two-pole circuit breaker is provided in which the two movable contacts mounted and held on the rotating member are insulated.
[0007]
Further, according to claim 2, the direction in which the movable contact of each of the poles extends from the rotating member is substantially symmetric with respect to the rotation center of the rotating member. A two-pole circuit breaker is provided.
[0008]
As a result, the movable contact at the two-pole contact portion is not arranged in parallel in the thickness direction of the circuit breaker. Can provide.
[0009]
According to a third aspect of the present invention, the inside of the case is roughly divided into three parts by a partition wall and a rotating member, and a movable / fixed contact of one pole, a movable / fixed contact of the other pole, and the remaining mechanisms / devices are divided. 3. The two-pole circuit breaker according to claim 1, wherein the two-pole circuit breaker is provided.
[0010]
According to a fourth aspect of the present invention, the inside of the case is substantially divided into three parts by a partition wall and a rotating member, and the rotating member is exposed to any of the divided sections. The two-pole circuit breaker according to claim 1 or 2, wherein the movable / fixed contact, the movable / fixed contact of the other pole, and the remaining mechanism / device are arranged separately.
[0011]
This makes it possible to separate the two contact parts and the mechanism / equipment part by the partition wall and the rotating member, and the arc gas spread prevents the tripping operation, or between the contact part of one electrode and the contact part of the other electrode, A thin two-pole circuit breaker with no insulation deterioration between the contact portion and the mechanism / device portion can be configured.
[0012]
The circuit breaker according to claim 5 is arranged in the order of a power supply side terminal, an operation handle, an opening / closing mechanism, a contact device and a tripping device, and a load side terminal. The rotary member is divided into approximately three sections, and each divided section is divided into a movable / fixed contact of one pole, a movable / fixed contact of the other pole, and the remaining mechanisms / devices. 3. The two-pole circuit breaker according to claim 1, wherein the two-pole circuit breaker is arranged in a plane perpendicular to a mounting surface of the circuit breaker including a direction connecting the load side terminals.
[0013]
The circuit breaker according to claim 6 is arranged in the order of a power source side terminal, an operation handle, an opening / closing mechanism, a contact device and a tripping device, and a load side terminal. And the rotating member, and the divided sections are divided into one movable / fixed contact, the other movable / fixed contact, and the remaining mechanisms / devices. Including the direction connecting the side terminal and the load side terminal, it is arranged in a plane perpendicular to the mounting surface of the circuit breaker, and the two sections where the movable and fixed contacts are arranged are on the mounting surface side of the circuit breaker, The remaining section is arranged on the operation handle surface side, and the two-pole circuit breaker according to claim 1 or 2 is provided.
[0014]
Further, the tripping device according to claim 7 is arranged for each pole on the handle surface side of the movable / fixed contact of each pole in the section where the mechanism / device is arranged. A two-pole circuit breaker is provided.
[0015]
Thereby, since each part is arranged and isolated in a plane, a two-pole circuit breaker having a small thickness, a reliable tripping operation, and little insulation deterioration between the electrodes can be obtained.
[0016]
According to an eighth aspect of the present invention, there is provided a case, an operation handle for turning on and off the contact device in conjunction with the opening / closing mechanism portion, a contact device, and a trigger for opening the movable contact from the fixed contact by acting on the opening / closing mechanism portion with an abnormal current. The contact device is opened and closed by operating the release device and the operation handle. When the trip device is operated, the contact member acts on the rotating member to force open the contact regardless of whether the operation handle is closed or not. In a two-pole circuit breaker equipped with an open / close mechanism, a power supply side terminal, and a load side terminal, a single-pole contact part and a single-pole trip device are arranged from the approximate center of the power supply side terminal and load side terminal to the power supply side. and the rest of the contact portion and the trip device placed on the load side from the substantially central portion, the contact portion and Unipolar tripping device piece pole with arranging the pre Symbol handle device and the opening and closing mechanism portion in a substantially central portion And the remaining contacts and tripping device Is obtained by providing a two-pole circuit breaker is characterized in that arranged close mechanism section in a plane.
[0017]
Thereby, since each part was arranged planarly, a thin bipolar circuit breaker can be obtained.
[0018]
A ninth aspect of the present invention provides the two-pole circuit breaker according to the eighth aspect, wherein at least the one-pole contact portion and the remaining contact portion are each partitioned by another portion and a partition wall. .
[0019]
Further, according to a tenth aspect of the present invention, there is provided the two-pole circuit breaker according to the eighth or ninth aspect, wherein the one-pole contact portion and the remaining contact portion are arranged on a mounting surface side of the breaker. .
[0020]
As a result, a thin two-pole circuit breaker can be obtained that does not have a malfunction in the tripping operation and an insulation deterioration between different poles.
[0021]
In the eleventh aspect, the conductive path is formed in the order of the power supply side terminal, the contact portion, the tripping device, and the load side terminal for one pole, and the remaining pole is in the order of the power supply side terminal, the tripping device, the contact portion, and the load side terminal. is obtained by providing a two-pole circuit breaker according to any one of claims 1 to 10, characterized in that the formation of the conductive path.
[0022]
Thereby, a thin two-pole circuit breaker in which the conductive path is not congested can be provided.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the internal structure when the embodiment of the present invention is OFF (contact opening), and FIG. 2 shows the state of the case. FIG. 3 shows the internal structure when ON (contacts are closed), and FIG. 4 shows the detailed structure of the rotating member 5 and the movable contacts 6 and 7.
[0024]
In FIG. 2, the outside of the circuit breaker includes a case 1, a case 8, and an insulating wall 3. Rotating member 5 in FIG. 1 is disposed in the body mounting a bottom side of a pair steering wheel 2 of the case 1, the rotation shaft 5a, 5b (not shown) is case 8, it is rotatably axially locked to the casing 1 Yes. Is the rotation member 5 link hole 5c for interlocking with opening and closing mechanism portion 10 is provided as shown in Figure 4, the handle 2 in FIG. 1, is operated in a counterclockwise direction about the axis 11 Accordingly, also rotates counterclockwise around the rotation shaft 5a turning member 5. Movable contacts 6 and 7 are mounted and held on the rotating member 5 from the rotation center of the shaft 5 a in a substantially symmetrical manner, and movable contacts 12 and 13 are formed outside the rotating member 5. As the rotating member 5 rotates, the movable contacts 12 and 13 also rotate counterclockwise around the axis 5a, and finally the movable contacts 12 and 13 come into contact with the fixed contacts 14 and 15 as shown in FIG. The circuit breaker is turned on (contact closed). The detailed description of the operation of the opening / closing mechanism 10 from the rotation of the handle 2 to the rotation of the rotation member 5 is not directly related to the present invention, and is omitted here.
[0025]
FIG. 5 is an exploded perspective view of the movable contacts 6 and 7 and the rotating member 5. The rotating member 5 is formed with insertion grooves 5d and 5e (not shown) for mounting and fixing the movable contact 7, and has claw portions 5f and 5g (not shown) for preventing removal after mounting. Yes. The movable contacts 6 and 7 are made of an elastic conductor, and are made up of movable contacts 12 and 13, conductive portions 16 and 17, rotating member insertion portions 18 and 19, and flexible conductor connecting portions 20 and 21, respectively. In this manner, the rotating member 5 is mounted and held.
The rotating member 5 is formed of an insulator, and the movable contacts 6 and 7 are insulated from each other.
[0026]
Since the movable contacts 6 and 7 are in different directions from the rotation shafts 5a and 5b of the rotation member 5 and extend substantially symmetrically from the rotation shafts 5a and 5b, they converge in the directions of the shafts 5a and 5b. Therefore, the width of each movable contact 6 and 7 and the size of the contact can be made sufficiently large between the case 1 and the case 2, and the dimension between the case 1 and the case 2, that is, the thickness of the circuit breaker is reduced. However, performances such as switching performance and short circuit performance are not inferior, and the two-pole circuit breaker can be made thin.
[0027]
In FIG. 1, reference numerals 23a and 23b denote tripping devices, which are composed of bimetal or electromagnetic elements. When an accident current such as an overcurrent or a short-circuit current flows in an electric circuit to which a circuit breaker is connected, the tripping mechanism 10 is tripped. The members 101 and 102 are actuated to disengage the contacts that keep the contacts closed, and the contacts are pulled from closed to open. It should be noted that the tripping device does not need to be arranged for two poles as shown in the figure, and in some cases, one pole, that is, one may be used, and can be arbitrarily configured. 24 and 25 are load side terminals and power source side terminals.
[0028]
In FIG. 1, 22a, 22b, and 22c are partition walls in the case 1 and the case 8, and each partition wall is connected to the rotating member 5 leaving a slight gap, and the case is formed by the rotating member 5 and the partition walls 22a, 22b, and 22c. The internal space of the circuit breaker composed of 1 and the case 8 is divided into approximately three sections, and each divided section includes a first section in which the fixed contact 14 and the movable contact 12 are disposed, and a fixed contact 15 and the movable contact 13. And the third section in which the tripping devices 23a and 23b, the opening / closing mechanism 10 and the operation handle 2 are arranged. The rotating member 5 is exposed to all of the first, second, and third sections, and the movable contact 6 is exposed to the second section from the portion that is exposed to the first section. The movable contact 7 from the portion is connected to the opening / closing mechanism 10 from the portion exposed to the third compartment, and the flexible conductor connecting portions 20, 21 extend to each compartment, and the first compartment The arcs generated in the second compartment are less likely to enter the other compartment. Therefore, it is difficult for the metal arc to adhere to the opening / closing mechanism 10 and the tripping devices 23a and 23b due to the generated arc, so that the tripping operation is not likely to occur, and the insulation deterioration between the different poles is less likely to occur.
[0029]
The first, second, and third sections are arranged in a plane on a plane that includes the direction from the power supply side terminal 25 to the load side terminal 24 of the circuit breaker and is perpendicular to the mounting bottom surface of the circuit breaker. Even in the three compartments, an opening / closing mechanism 10 is provided at the approximate center between the power supply side terminal and the load side terminal, a tripping device 23a is placed on the power supply terminal 25 side across the opening / closing mechanism 10 and a tripping device 23b is placed on the load terminal 24 side. Since it is arranged in the same plane as described above, the thickness of the circuit breaker constituted by the case 1 and the case 8 can be reduced.
[0030]
The partition walls 22a, 22b, and 22c may be omitted in a circuit breaker used for a circuit having a small arc generated when the contacts are separated.
[0031]
In FIG. 1, the load side terminal 24 can be seen only for one pole, but the terminals of the remaining poles are arranged on the back side of the insulating wall 3.
[0032]
The electrical connection of the two-pole circuit breaker shown in the figure is performed as follows. The power supply side terminal 25 is connected to the flexible conductor connecting portion 21 of the movable contact 7 by a flexible conductor (not shown) through the tripping element 23a, and the load side terminal 24 is connected from the movable contact 7 through the movable contact 13 and the fixed contact 15. Connected to. Further, the remaining poles are connected to the fixed contact 14 from the remaining power supply side terminal hidden behind the power supply side terminal 25, and the movable contact 12, the movable contact 6, the flexible conductor connecting portion 20, and not shown. It is connected to the load side terminal on the back side of the load side terminal 24 from the tripping device 23b via the flexible conducting wire.
In this way, the conductive contacts can be efficiently arranged inside the thin circuit breaker using the movable contacts extending symmetrically from the rotation center of the rotation member 5, and the conductive portions are the case 1 and the case 2. There is no congestion in the thickness direction.
[0033]
The present invention is configured to make the two-pole circuit breaker thin, and from the substantially center of the power supply side terminal 25 and the load side terminal 24 to the power supply side from the one-pole fixed contact 14 and the movable contact 12. The contact portion and the one-pole tripping device 23a are arranged, and the contact portion and the tripping device 23b consisting of the remaining fixed contact 15 and the movable contact 13 are arranged from the substantially central portion to the load side, and the above-mentioned contact portion is arranged at the substantially central portion. A thin two-pole shield is provided by arranging the operation handle 2 and the opening / closing mechanism 10 and arranging the one-pole contact part, the one-pole tripping device, the remaining contact part, the tripping device, and the switching mechanism part in a plane. You can do it.
[0034]
The one-pole contact portion composed of the fixed contact 14 and the movable contact 12 and the remaining contact portion composed of the fixed contact 15 and the movable contact 13 are arranged on the mounting surface side of the circuit breaker and the one-pole contact portion. The remaining contact portions are separated from other portions by partition walls 22a, 22b, and 22c. Therefore, since the arc generated at the contact portion does not spread to other sections, a thin two-pole circuit breaker that does not have a malfunction of the tripping operation and does not cause deterioration of insulation between different poles can be obtained.
[0035]
【The invention's effect】
As described above, according to the first, second, and eighth inventions, a thin two-pole circuit breaker can be provided. According to the invention other than the first, second, and eighth aspects, it is possible to obtain a two-pole circuit breaker that is thin and has no malfunction of the tripping operation by the arc gas and insulation deterioration between the different poles.
[Brief description of the drawings]
FIG. 1 shows the internal structure when OFF (contact is open) in the embodiment of the present invention. FIG. 2 shows the structure of the case in the embodiment of the present invention. Structure [FIG. 4] Detailed structure of rotating member 5 and movable contacts 6 and 7 [FIG. 5] Exploded perspective view of rotating member 5 and movable contacts 6 and 7 [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 2 Handle 3 Insulating wall 4 Insulating wall 5 Rotating member 5a Rotating shaft 5b Rotating shaft 5c Link hole 5d Inserting groove 5e Inserting groove 5f Claw part 5g Claw part 6 Movable contactor 7 Movable contactor 8 Case 10 Opening / closing mechanism part 101 Tripping member 102 Tripping member 11 Shaft 12 Movable contact 13 Movable contact 14 Fixed contact 15 Fixed contact 16 Electrodynamic part 17 Conductive part 18 Rotating member insertion part 19 Rotating member insertion part 20 Flexible conductor connecting part 21 Flexible conductor Connection part 22a Bulkhead 22b Bulkhead 22c Bulkhead 23a Tripping device 23b Tripping device 24 Load side terminal 25 Power supply side terminal 26 Link

Claims (11)

A case, a manipulation handle to turn on and off the contact device in conjunction with the opening and closing mechanism, and the stationary contactor contact apparatus provided with the fixed contact is fixed to the case, a movable contact disposed stationary contact pair countercurrent to A movable member that is mounted and held to rotate the movable contact so that the movable contact comes in contact with and away from the fixed contact; A tripping device that opens the contact from the fixed contact, and opens and closes the movable contact and the fixed contact by operating the operation handle.When the tripping device is activated, the contact is opened regardless of whether the operation handle is closed. In the two-pole circuit breaker provided with an opening / closing mechanism that acts on the rotating member so as to forcibly open the pole, the movable contact of each pole extends in a substantially opposite direction from the center of rotation of the rotating member, The movable contact is Located from the pivot member on the moving contact child outside, which is the rotating member moving contact with the rolling to Turkey it is separable and fixed contacts, and two movable mounted retaining the pivot member A two-pole circuit breaker characterized in that the contacts are insulated. 2. The two-pole circuit breaker according to claim 1, wherein the direction in which the movable contact of each of the poles extends from the rotating member is substantially symmetrical with respect to the rotation center of the rotating member. The inside of the case is roughly divided into three parts by a partition wall and a rotating member, and one divided movable / fixed contact, another pole movable / fixed contact, and the remaining mechanisms / devices are divided into divided sections. The two-pole circuit breaker according to claim 1 or 2, characterized in that. The inside of the case is divided into approximately three parts by a partition wall and a rotating member, and the rotating member is exposed to any of the divided sections. 3. The two-pole circuit breaker according to claim 1, wherein the movable / fixed contact of the pole and the remaining mechanism / device are arranged separately. The circuit breaker is arranged in the order of a power source side terminal, an operation handle, an opening / closing mechanism, a contact device and a tripping device, and a load side terminal. Divided into approximately three sections, each divided section has a movable / fixed contact of one pole, a movable / fixed contact of the other pole, and the remaining mechanism / device. Each section has a power supply side terminal and a load side terminal. 3. The two-pole circuit breaker according to claim 1, wherein the two-pole circuit breaker is arranged in a plane perpendicular to a mounting surface of the circuit breaker including a connecting direction. The circuit breaker is arranged in the order of a power source side terminal, an operation handle, an opening / closing mechanism, a contact device and a tripping device, and a load side terminal. Divided into approximately three sections, one divided movable / fixed contact, the other movable / fixed contact, and the remaining mechanisms / devices are divided into sections, and each section is divided into a power supply side terminal and a load side The two sections where the movable and fixed contacts are arranged are on the breaker mounting surface side, and the remaining sections are operated. The two-pole circuit breaker according to claim 1 or 2, wherein the two-pole circuit breaker is disposed on a handle surface side. 7. The two-pole circuit breaker according to claim 6, wherein the tripping device is arranged for each pole on the handle surface side of the movable / fixed contact of each pole in a section where the mechanism / device is arranged. vessel. A case, an operation handle for turning on and off the contact device in conjunction with the opening and closing mechanism, a contact device, a tripping device for acting on the opening and closing mechanism with an abnormal current to open the movable contact from the fixed contact, and an operation An opening / closing mechanism that acts on the rotating member to forcibly open the contact regardless of the presence or absence of the contact closing operation restraint of the operation handle when the contact device is opened and closed by operating the handle and the tripping device is activated; In a two-pole circuit breaker equipped with a power supply side terminal and a load side terminal, a one-pole contact part and a single-pole trip device are arranged from the approximate center of the power supply side terminal and the load side terminal to the power supply side, and the remaining contacts parts and trip device is arranged on the load side from the substantially central portion, together with arranging the pre Symbol handle device and the opening and closing mechanism portion in a substantially central portion tripping of the contact portion and Unipolar piece pole device and the remaining contact portion And the trip device and the opening / closing mechanism 2-pole circuit breakers, characterized in that arranged in the plane manner. 9. The two-pole circuit breaker according to claim 8, wherein at least the one-pole contact portion and the remaining contact portions are each partitioned by another portion and a partition wall. 10. The two-pole circuit breaker according to claim 8, wherein the one-pole contact portion and the remaining contact portions are arranged on a mounting surface side of the breaker. For one pole, a conductive path was formed in the order of the power supply side terminal, contact point, tripping device, and load side terminal, and for the remaining poles, a conductive path was formed in the order of the power supply side terminal, tripping device, contact point, and load side terminal. The two-pole circuit breaker according to any one of claims 1 to 10 , wherein

Images