JP2001210170A - Circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breaker which is easy to manufacture and can make a smooth on/off operation of the moving contact, and can generate a large electromagnetic repulsion when cutting off a large current. SOLUTION: In a breaker, the stationary contact 1 is made of a first conductor 1a which forms a terminal 3, a third conductor 1c which has a fixed contact 2, and a second conductor 1b which is a fork connector of the first and the third conductors, and connecting point of a second conductor with a third conductor is positioned at the other end where the movable contact is not positioned but farther than the stationary contact, and on the other side of the terminal, also the first conductor is positioned above the contact surface when contacts are closed so that the movable contact makes on/off motion through the fork of the second conductor. In such a breaker, the fixed contact point is made by folding a flat plate along the boundary of the first and the second conductor and along the boundary of the third and the second conductor separately patterned and developed on the plate, and the devided parts are fixed to contact each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch, such as a circuit breaker, a current limiter, or an electromagnetic contactor, in which an arc is generated in a vessel when current is interrupted, and more particularly to a structure of a fixed contact thereof. is there.

[0002]

2. Description of the Related Art FIG. 14 is a side view showing a configuration of a main part of a conventional circuit breaker in a closed state of a circuit breaker disclosed in, for example, JP-A-6-20547, and FIG.
It is a perspective view which shows the structure of the fixed contact of FIG. In FIG. 14, reference numeral 1 denotes a fixed contact, and a fixed contact 2 is fixed to one end, and a terminal 3 having a hole 3a into which a terminal screw is inserted is formed at the other end. Reference numeral 4 denotes a movable contact, and a movable contact 5 which can be brought into contact with and separated from the fixed contact 2 is fixed to one end.
The other end has a pivot 4a. 6 is an arc extinguishing device, 7
Is a case for accommodating the fixed contact 1, the movable contact 4, and the arc extinguishing device 6. Reference numeral 8 denotes an insulator, which covers a part of the fixed contact 1. FIG. 14 shows the inside of the case 7 with a part thereof removed. FIG.
As shown in FIG. 5, the fixed contact 1 is integrally formed in a J shape by the first conductor portion 1a, the second conductor portion 1b, and the third conductor portion 1c, and the third conductor which is one end of the J shape is formed. The fixed contact 2 is fixed to the upper surface of the portion 1c, and the terminal portion 3 is formed on the first conductor 1a. Further, the second conductor portion 1b is bifurcated by the slit 20 to connect the first conductor portion 1a and the third conductor portion 1c, and to open and close the movable contact 1 with respect to the fixed contact 3 on the third conductor portion 1c. Operation is this slit 2
Done through 0.

First, the operation of the circuit breaker when a large current is interrupted will be described. In the closed state, the movable contact 5 fixed to the movable contact 4 is in contact with the fixed contact 2 while being urged by a contact pressure spring (not shown). Here, when a large current such as a short-circuit current flows, the electromagnetic repulsive force generated by the current flowing through the fixed contact 1 and the movable contact 4 becomes larger than the spring force of the contact pressure spring, and the movable contact 5 Is separated from the fixed contact 2 and an arc is generated between the contacts 2 and 5. Thereafter, the generated arc is extinguished by the extinguishing device 6.

Next, an example of a method for producing the fixed contact 1 having such a configuration will be described. FIG. 16 shows FIG.
FIG. 17 is a plan development view of the fixed contact of FIG. 16, for example, punched from a copper plate to form a shape as shown in FIG.
Next, the two fixed broken lines in FIG. 16 are bent to about 90 degrees, and the fixed contact 2 is brazed to the surface of the third conductor 1c.
Finally, a fixed contact as shown in FIG. 15 is obtained.

[0005]

If the electromagnetic repulsive force acting on the movable contact 4 can be increased, the opening speed increases, and the arc can be rapidly extended. In general, an arc has a resistance proportional to its length, so if the arc can be stretched rapidly, a large resistance can be quickly added to the short circuit, and the occurrence of the rapid resistance can reduce a large fault current. Can be limited to value. However, in the conventional fixed contact 1 as shown in FIG.
However, there is a problem that a large electromagnetic repulsion cannot be obtained because the eleventh portion of c) cannot be made long.

Therefore, as shown in FIG.
If the length of the third conductor portion 1c is increased by shortening 0, a long anti-power generation channel 11 can be secured. However, the bent portion with the broken line on the left side in FIG. There is a problem that bending is difficult because of its long length (that is, the conductor area is large).
And the position of the fixed contact 2 are almost determined by other conditions).

Further, a configuration as shown in FIG. 18 is conceivable, but in this case, there is a problem as described below with reference to FIG. FIG. 19 shows a cross-sectional view (cross-sectional view taken along line AA in FIG. 14) of the movable contact and the fixed contact in the closed state. In FIG. 19, the component A of the electromagnetic force acting on the movable contact 4 is due to the third conductor 1c of the fixed contact 1, and the components B and C are each divided into two forked second conductors 1b _-1. And 1b _-2 , and the resultant force of these component forces A, B and C becomes the opening force of the movable contact 4. At this time, if one of the second conductor portions 1b- ₁ and 1b- ₂ is missing as in the fixed contact 1 shown in FIG. 18, the direction of the resultant force becomes oblique in FIG. A mechanical stress is applied to the movable part of the mechanism connected to the child 4 in a direction different from the movable direction. As a result, there is a problem that the opening and closing operation of the movable contact 4 is difficult to be performed smoothly.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is easy to manufacture and can smoothly open and close a movable contact. It is an object of the present invention to provide a switch such as a circuit breaker that can generate the switch.

[0009]

According to a first aspect of the present invention, there is provided a switch comprising: a movable contact having a movable contact at one end;
A fixed contact that has a fixed contact at one end and a terminal at the other end that can be brought into contact with and separated from the movable contact by the opening and closing operation of the movable contact. When the direction in which the fixed contact is separated from the fixed contact is upward, the fixed contact is formed by a first conductor portion forming the terminal portion, a third conductor portion having the fixed contact, and a first conductor portion and a third conductor portion. And the second conductor portion is connected to the second conductor portion in a forked manner, and the connection position of the third conductor portion with the second conductor portion is different from the position of the fixed contact at the other end where the movable contact of the movable contact is not provided. Side and on the opposite side of the terminal portion, the first conductor portion is disposed above the contact contact surface when the contact is closed, and the movable contact passes through the fork of the second conductor portion. In a switch configured to perform an opening and closing operation, the fixed contact may be a first conductor or a second conductor. A flat plate member having a shape in which the conductor portion is divided and expanded is formed by bending a boundary portion between the first conductor portion and the second conductor portion and a boundary portion between the third conductor portion and the second conductor portion. It is fixed so that the portions that come in contact with each other.

The switch according to the second configuration of the present invention comprises a first switch.
The terminal of the fixed contact has a hole into which a terminal screw is inserted, and the fixed contact has a first conductor portion divided vertically into two, A flat plate member having a shape developed in a double-opened manner from the portion is connected to a boundary portion between the first conductor portion and the second conductor portion and a boundary portion between the third conductor portion and the second conductor portion when the movable contactor is opened and closed. It is formed by bending each with a line substantially parallel to the displacement surface, and the two divided first conductor portions are fixed by terminal screws.

[0011] The switch according to the third configuration of the present invention comprises a first switch.
In the configuration of the above, the fixed contact has a third conductor portion divided into two along a line substantially parallel to the displacement surface of the movable contact, and the fixed conductor has a shape which is developed from the divided portion into a double-opened shape. And bending the plate member having the boundary portion between the first conductor portion and the second conductor portion and the boundary portion between the third conductor portion and the second conductor portion along a line substantially parallel to a displacement surface when the movable contact is opened and closed. Thus, the two divided third conductor portions are fixed by fixing fixed contacts on the dividing line.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a main part showing a closed state of a circuit breaker as a switch according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a configuration of a fixed contact of FIG. 1, and FIG. FIG. 4 is a developed plan view of the fixed contact of FIG. In FIG. 1, reference numeral 1 denotes a fixed contact which has a fixed contact 2 fixed at one end and a hole 3a into which a terminal screw is inserted at the other end.
Is formed. A movable contact 4 is fixed to one end of a movable contact 5 that can be brought into contact with and separated from the fixed contact 2, and has a pivot point 4a at the other end. Reference numeral 6 denotes an arc extinguishing device, and reference numeral 7 denotes a case for housing the fixed contact 1, the movable contact 4, and the arc extinguishing device 6. In FIG. 1, a part of the case 7 is removed to show the inside. FIG.
As shown in FIG. 2, the fixed contact 1 has a first conductor portion 1a forming the terminal portion 3, a third conductor portion 1c having the fixed contact 2, and the first conductor portion 1a and the third conductor portion 1c bifurcated. The second conductor portion 1b is divided and connected. The connection position of the third conductor portion 1c with the second conductor portion 1b is such that the movable contact 5 of the movable contact 4 is provided from the position of the fixed contact 2. The first conductor portion 1a is disposed on the other end portion side and on the opposite side of the terminal portion 3 (that is, on the lower left side of the fixed contact 2 as viewed in FIG. 2).
Are disposed above the contact surfaces of the movable contacts 5 when the contacts 2 and 5 are closed, and are disposed below the contact surfaces of the movable contacts 5 when the contacts 2 and 5 are opened, and pass between the forks of the second conductor portion 1b. The movable contact 4 is configured to open and close. Furthermore, the first conductor portion 1a is divided into two vertically.

FIG. 3 is a plan development view obtained by developing the fixed contact 1 having the shape shown in FIG. 2 from the divided portion of the first conductor portion 1a in a double-opened manner. The first conductor portion 1a and the second conductor portion 1b and the third conductor portion 1c and the second conductor portion 1b
Are defined by lines (indicated by dashed lines in FIG. 3) parallel to the displacement surface during the opening and closing operation of the movable contact (in FIG. 3, the displacement surface of the center line in the width direction of the movable contact is indicated by a dashed line). By bending, the fixed contact 1 as shown in FIG. 2 is obtained. The broken line portions (ie, bent portions) in FIG. 3 are all portions having a small conductor area, and are easy to bend. Further, the second conductor portion 1b is bifurcated, and a smooth opening and closing operation of the movable contact 4 is possible without applying a mechanical stress in a direction different from the moving direction of the movable contact 4. Further, as shown in FIG. 2, the manufactured fixed contact 1 can secure a long anti-power generation channel 11, so that a large electromagnetic repulsion can be applied to the movable contact 4. Therefore, a circuit breaker having excellent current limiting performance can be obtained. Further, the first conductor portion 1a (that is, the terminal portion 3), which is a divided portion, is doubled, and is fastened together by a terminal screw (not shown) to provide another component or to add another process. It is possible to firmly fix the divided portions so that they come into contact with each other without performing.

In the above embodiment, as shown in FIG. 3, the case where the bending line (dashed line) is parallel to the displacement surface (dashed line) when the movable contact is opened and closed is described. The distance between the two forks of the second conductor 1b may be slightly different from that of the first conductor 1a in FIG.
The side may be large or conversely small.

In order to prevent the arc generated between the movable contact 5 and the fixed contact 2 from dislocating to the second conductor 1b, the contact surface of the movable contact 5 when the contact is opened in the second conductor 1b. It is preferable to cover a portion that can be seen from the above with an insulator. This is the same in each of the following embodiments, although not particularly specified.

Embodiment 2 FIG. 4 is a perspective view showing a configuration of a fixed contact according to Embodiment 2 of the present invention, and FIG. 5 is a developed plan view of the fixed contact of FIG. The overall configuration of the circuit breaker is the same as in FIG. In the first embodiment, the first
Although the case where the conductor 1a is divided into two has been described, in the present embodiment, the third conductor 1c is divided into two along a line parallel to the displacement surface of the movable contact.

FIG. 5 is a plan view of the fixed contact 1 having the shape shown in FIG. 4 obtained by developing the fixed contact 1 from the divided portion of the third conductor portion 1c in a double-opened manner. The first conductor portion 1a and the second conductor portion 1b and the third conductor portion 1c and the second conductor portion 1b
Are defined by lines (indicated by dashed lines in FIG. 5) parallel to the displacement surface during the opening and closing operation of the movable contact (in FIG. 5, the displacement surface of the center line in the width direction of the movable contact is indicated by a dashed line). Two third conductor portions 1 formed by bending and divided
c is fixed by fixing the fixed contact 2 on the dividing line, for example, by brazing, to obtain a fixed contact as shown in FIG.

Also in the present embodiment, the broken line portions (ie, bent portions) in FIG. 5 are all portions having a small conductor area, and are easy to bend. In addition, as shown in FIG. 4, the manufactured fixed contact 1 can secure a long anti-power generation flow path 11, so that a large electromagnetic repulsion can be applied to the movable contact 4. Further, the second conductor portion 1b is bifurcated, and a smooth opening and closing operation of the movable contact 4 can be performed without applying a mechanical stress in a direction different from the moving direction of the movable contact 4. Therefore, a switch with excellent current limiting performance can be obtained. Furthermore, since the fixed contact 2 is brazed, the fixed contact 2 can be fixed and the divided portion can be fixed, so that the divided portions come into contact with each other without providing another component or adding another process. Can be fixed firmly.

In the second embodiment, as shown in FIG. 5, the case where the bending line (broken line) is parallel to the displacement surface (dashed line) during the opening / closing operation of the movable contact has been described. It may be slightly deviated from parallel, for example, as shown in FIG.
The distance between the forks of the second conductor portion 1b is
The a side may be large or conversely small. Also, the case where the third conductor portion 1c is divided into two along a line parallel to the displacement surface of the movable contact has been described,
The line dividing the third conductor portion 1c may be slightly displaced from the line parallel to the displacement surface of the movable contact, and is not limited to a straight line, but may be a wavy line or the like.

Embodiment 3 FIG. 6 is a perspective view showing a configuration of a fixed contact according to Embodiment 3 of the present invention, and FIG. 7 is a developed plan view of the fixed contact of FIG. The overall configuration of the circuit breaker is the same as in FIG. In the present embodiment, the first conductor 1a is vertically divided, and the third conductor 1c is also divided into two along a line parallel to the displacement surface of the movable contact, as shown in FIG. As described above, the first conductor portion 1a and the third conductor portion 1c are both folded at the broken line portions by using two flat plate members having a shape developed by dividing and expanding the first conductor portion 1a and the third conductor portion 1c. The third conductors 1c are joined together to form a shape as shown in FIG. 6, and the first conductors 1a stacked one above the other are fastened together by terminal screws (not shown) and the third conductors joined together. The portion 1c is fixed on the parting line by fixing the fixed contact 2 by, for example, brazing to obtain a fixed contact as shown in FIG. In the thus configured device, in addition to the effects of the first and second embodiments, an effect of excellent material removal can be obtained because one flat plate member is small.

Embodiment 4 FIG. FIG. 8 is a perspective view showing a configuration of a fixed contact according to Embodiment 4 of the present invention, and FIG. 9 is a developed plan view of the fixed contact of FIG. The overall configuration of the circuit breaker is the same as in FIG. In the first embodiment, the case where the first conductor portion 1a is divided into upper and lower portions has been described. In the present embodiment, however, the first conductor portion 1a is provided with a displacement surface of the movable contact (the movable contact shown in the figure). (The displacement plane of the center line in the width direction is indicated by an alternate long and short dash line). Also in this case, a plate member having a shape as shown in FIG. 9 is bent at the boundary between the first conductor 1a and the second conductor 1b and the boundary between the third conductor 1c and the second conductor 1b. As shown in FIG. 8, the divided portion of the first conductor portion 1a is fixed by a recess provided in the case 7, and is electrically connected by tightening a terminal screw. Also in the present embodiment, as in the case of the first embodiment, a circuit breaker that can be easily manufactured and can smoothly open and close the movable contact, and can generate a large electromagnetic repulsive force when a large current is interrupted. A vessel is obtained.

Embodiment 5 FIG. 10 is a perspective view showing a configuration of a fixed contact according to Embodiment 5 of the present invention, and FIG. 11 is a developed plan view of the fixed contact of FIG. The overall configuration of the circuit breaker is the same as in FIG. In the second embodiment, the case where the third conductor 1c is divided into two along a line parallel to the displacement surface of the movable contact has been described, but in the present embodiment, the third conductor 1c is vertically Is divided into two. Also in this case, a plate member having a shape as shown in FIG. 11 is bent at the boundary between the first conductor 1a and the second conductor 1b and the boundary between the third conductor 1c and the second conductor 1b. As shown in FIG. 10, two divided third conductor portions 1c and fixed contacts 2 are fixed vertically so that the divided portions are in contact with each other. As in the case of the second embodiment, a circuit breaker that is easy to manufacture, can smoothly open and close the movable contact, and can generate a large electromagnetic repulsion when a large current is interrupted is provided. can get.

Embodiment 6 FIG. FIG. 12 is a perspective view showing a configuration of a fixed contact according to Embodiment 6 of the present invention, and FIG. 13 is a developed plan view of the fixed contact of FIG. The overall configuration of the circuit breaker is the same as in FIG. Also in the present embodiment, the fixed contact 1 is the first conductor 1 forming the terminal 3.
a, a third conductor portion 1c having a fixed contact 2 and a second conductor portion 1b having a slit 20 and connecting the first conductor portion 1a and the third conductor portion 1c in a forked manner. And the connection position of the third conductor 1c with the second conductor is
The other end of the movable contact 4 where the movable contact 5 is not provided than the position of the fixed contact 2 and the opposite side of the terminal 3 (that is, the lower left side of the fixed contact 2 in FIG. 12),
The first conductor 1a is disposed above the contact surface of the movable contact 5 when the contacts 2 and 5 are closed, and is disposed below the contact surface of the movable contact 5 when the contact is opened. The movable contact 4 is configured to open and close through a fork (slit 20). Furthermore, the third conductor portion 1
c is divided into two along a line parallel to the displacement surface of the movable contact.

The fixed contact having such a shape is obtained by first dividing a flat member having a shape obtained by dividing and expanding the third conductor 1c as shown in FIG.
The boundary portion of the conductor portion 1b and the boundary portion of the third conductor portion 1c and the second conductor portion 1b are formed by bending each broken line portion at about 90 degrees, and the two divided third conductor portions 1c are divided. It is obtained by fixing the fixed contact 2 on the wire, for example, by fixing it by brazing.

Also in the present embodiment, the broken line portions (that is, bent portions) in FIG. 13 are all portions where the conductor area is small, and the bending process is easy. The second conductor portion 1b is bifurcated, so that no mechanical stress is applied in a direction different from the direction in which the movable contact 4 moves.
Can be smoothly opened and closed. Further, as shown in FIG. 12, the produced fixed contact 1 has a long anti-power generation flow path 1.
1 can be secured, so that a large electromagnetic repulsion can be applied to the movable contact 4. Therefore, a circuit breaker having excellent current limiting performance can be obtained. Furthermore, since the fixed contact 2 is brazed, the fixed contact 2 can be fixed and the divided portion can be fixed, so that the divided portions come into contact with each other without providing another component or adding another process. Can be fixed firmly.

In each of the above embodiments, the case of a circuit breaker has been described. However, another switch such as a current limiter or an electromagnetic contactor may be used. Is obtained.

[0027]

As described above, according to the first configuration of the present invention, a movable contact having a movable contact at one end, and a fixed contact which can be separated from the movable contact by opening and closing the movable contact. A fixed contact having a contact at one end and a terminal at the other end, wherein when the direction in which the movable contact in the contact closed state is separated from the fixed contact is upward, the fixed contact To
A third conductor comprising a first conductor forming the terminal portion, a third conductor having the fixed contact, and a second conductor connecting the first conductor and the third conductor in a forked manner; The connection position of the portion with the second conductor portion is arranged on the other end side where the movable contact of the movable contact is not provided and on the opposite side of the terminal portion from the position of the fixed contact, and the first conductor portion is In a switch arranged above the contact contact surface at the time of closing the contact, the movable contact is configured to open and close through a fork of the second conductor portion, wherein the fixed contact includes: A plate member having a shape in which the first conductor portion or the third conductor portion is divided and expanded is bent at a boundary portion between the first conductor portion and the second conductor portion and a boundary portion between the third conductor portion and the second conductor portion. Molded and fixed so that the divided portions come into contact with each other. In, it can be smoothly opened and closed easily, yet movable contact is manufactured, switch is obtained which is capable of generating a large electromagnetic repulsion force when a large current interruption.

According to a second configuration of the present invention, in the first configuration, a hole for inserting a terminal screw is formed in a terminal portion of the fixed contact, and the fixed contact is formed in the first contact. One conductor portion is vertically divided into two portions.
The boundary between the conductor and the second conductor and the third conductor and the second conductor
Since the boundary portion of the conductor is formed by bending each of the conductors at a line substantially parallel to the displacement surface at the time of the opening and closing operation of the movable contact, and the two divided first conductors are fixed by terminal screws, In addition to the above effects, there is obtained an effect that the divided portions can be firmly fixed so as to be in contact with each other without providing another component or adding another process.

The switch according to the third configuration of the present invention comprises a first switch.
In the configuration of the above, the fixed contact has a third conductor portion divided into two along a line substantially parallel to the displacement surface of the movable contact, and the fixed conductor has a shape which is developed from the divided portion into a double-opened shape. And bending the plate member having the boundary portion between the first conductor portion and the second conductor portion and the boundary portion between the third conductor portion and the second conductor portion along a line substantially parallel to a displacement surface when the movable contact is opened and closed. In this case, the two divided third conductor portions are fixed by fixing fixed contacts on the dividing line, so that in addition to the above-described effects, another component is provided or another process is added. There is an effect that the divided portions can be fixed so as to be in contact with each other without contact.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing a closed state of a circuit breaker according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a configuration of the fixed contact of FIG. 1 according to the first embodiment of the present invention.

FIG. 3 is a plan developed view of the fixed contact of FIG. 2 according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a fixed contact according to Embodiment 2 of the present invention.

FIG. 5 is an exploded plan view of the fixed contact of FIG. 4 according to the second embodiment of the present invention.

FIG. 6 is a perspective view showing a configuration of a fixed contact according to Embodiment 3 of the present invention.

7 is an exploded plan view of the fixed contact of FIG. 6, according to the third embodiment of the present invention.

FIG. 8 is a perspective view showing a configuration of a fixed contact according to Embodiment 4 of the present invention.

9 is a developed plan view of the fixed contact shown in FIG. 8 according to the fourth embodiment of the present invention.

FIG. 10 is a perspective view showing a configuration of a fixed contact according to Embodiment 5 of the present invention.

FIG. 11 is an exploded plan view of the fixed contact of FIG. 10 according to the fifth embodiment of the present invention.

FIG. 12 is a perspective view showing a configuration of a fixed contact according to Embodiment 6 of the present invention.

FIG. 13 is a plan developed view of the fixed contact of FIG. 12, according to the sixth embodiment of the present invention.

FIG. 14 is a side view of a main part showing a closed state of a conventional circuit breaker.

FIG. 15 is a perspective view showing a configuration of a fixed contact of FIG.

16 is a developed plan view of the fixed contact of FIG.

FIG. 17 is a developed plan view showing an example of a configuration of a fixed contact that can be considered when it is desired to secure an anti-power generation flow path with a conventional circuit breaker.

FIG. 18 is a perspective view showing another example of a configuration of a fixed contact that can be considered when it is desired to secure an anti-power generation flow path with a conventional circuit breaker.

FIG. 19 is a diagram illustrating a cross section taken along line AA of FIG. 14 and illustrating an electromagnetic force acting on the movable contact.

[Explanation of symbols]

Reference Signs List 1 fixed contact, 1a first conductor, 1b second conductor, 1c third conductor, 2 fixed contact, 3 terminal, 3
a hole, 4 movable contacts, 4a rotation fulcrum, 5 movable contacts, 6 arc extinguishing device, 7 case, 8 insulator, 20 slits.

Claims (3)

[Claims] 1. A movable contact having a movable contact at one end, a fixed contact at one end capable of coming into contact with and separating from the movable contact by opening and closing the movable contact, and a terminal at the other end. A fixed contact, when the direction in which the movable contact in the contact closed state is separated from the fixed contact is set to be upward, the fixed contact is changed to a first conductor portion forming the terminal portion, and the fixed contact And a second conductor portion for connecting the first conductor portion and the third conductor portion in a forked manner, and connecting the third conductor portion to the second conductor portion with the fixed contact. , The movable contact of the movable contactor is arranged on the other end side where the movable contact is not provided and on the opposite side to the terminal portion, and the first conductor portion is
A switch arranged above the contact contact surface at the time of closing the contact, wherein the movable contact is configured to open and close through a fork of the second conductor, wherein the fixed contact comprises: A plate member having a shape in which the first conductor portion or the third conductor portion is divided and expanded is bent at a boundary portion between the first conductor portion and the second conductor portion and a boundary portion between the third conductor portion and the second conductor portion. Wherein the divided portions are fixed so that the divided portions are in contact with each other. 2. A terminal portion of the fixed contact has a hole into which a terminal screw is inserted, and the fixed contact has a first conductor portion divided vertically into two parts. A flat plate member having a shape expanded in a double-leafed shape from the divided portion is moved to the boundary between the first conductor and the second conductor and the boundary between the third conductor and the second conductor when the movable contact is opened and closed. 2. The switch according to claim 1, wherein each of the first conductor portions is formed by being bent by a line substantially parallel to the displacement surface, and the two divided first conductor portions are fixed by terminal screws. 3. The fixed contact, wherein a third conductor portion is divided into two along a line substantially parallel to a displacement surface of the movable contact, and the third conductor portion is developed from the divided portion into a double-opened shape. The boundary between the first conductor and the second conductor and the boundary between the third conductor and the second conductor are indicated by lines substantially parallel to the plane of displacement when the movable contact is opened and closed. 2. The switch according to claim 1, wherein the switch is formed by bending, and the two divided third conductor portions are fixed by fixing fixed contacts on the dividing line.