JP2011065925A - Slit arc-extinguishing type air break switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slit arc-extinguishing type air break switch reducing the size of an arc-extinguishing chamber and the cost. <P>SOLUTION: The slit arc-extinguishing type air break switch includes a fixed electrode 13, a movable electrode 18 rotatable along an arc-shaped passage between a closed-circuit position and an open-circuit position, a contact pressure spring 14 disposed outside, and mating with, the fixed electrode 13, an arc horn 15 disposed near the fixed electrode, and an arc-extinguishing chamber 16 having a case part 16A accommodating the fixed electrode 13 together with the contact pressure spring 14 and the arc horn 15, and an arc-extinguishing part 16B arranged along the arc-shaped passage of the movable electrode. The arc horn 15 is supported by the contact pressure spring 14. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an air switch equipped with a slit arc extinguishing mechanism.

  As a switch used for a high-voltage distribution line or a special high-voltage distribution line, a slit arc extinguishing type air switch shown in Patent Document 1 or Patent Document 2 is used. The slit arc extinguishing type air switch is an arcuate path between a fixed electrode held by a support insulator and an open position where the fixed electrode is in contact with an open position where the fixed electrode is in contact with the fixed electrode. A movable electrode that is rotated along the fixed electrode, and a contact pressure that is disposed outside the fixed electrode and energizes the fixed electrode in a state of being attached to the fixed electrode in order to obtain a contact pressure between the fixed electrode and the movable electrode. A spring, an arc horn arranged in the vicinity of the fixed electrode in order to move the leg on the fixed electrode side of the arc generated between the two electrodes when the movable electrode is separated from the fixed electrode, and the fixed electrode with the contact spring And an arc extinguishing chamber having a case portion accommodated together with the arc horn and a slit arc extinguishing portion arranged along the arcuate passage of the movable electrode. The arc horn is provided to prevent the fixed electrode from being melted by the arc.

  6 (A) and 6 (B) show the main part of a slit arc extinguishing air switch shown in Patent Document 1. FIG. In these drawings, reference numeral 1 denotes a support insulator for supporting the fixed electrode, 2 denotes a fixed electrode supported by the support insulator 1, and 3 denotes a blade-shaped movable electrode. The movable electrode 3 is operated by an operating mechanism (not shown), and an arcuate path between a closing position where the movable electrode 3 is in contact with the fixed electrode 2 and an open position where the predetermined insulating distance is separated from the fixed electrode 2 It is displaced along. Reference numeral 4 denotes a contact pressure spring which is disposed in close contact with the outside of the fixed electrode 2 and biases the fixed electrode 2 toward the movable electrode in order to bring the fixed electrode 2 into contact with the movable electrode 3 with sufficient contact pressure. Reference numeral 5 denotes an arc horn support member supported by the support insulator 1, and 6 denotes an arc horn positioned near the tip of the fixed electrode 2 and screwed to the arc horn support member 5 in order to prevent the fixed electrode 2 from being melted. is there. The arc horn support member 5 is made of a conductive material and is electrically connected to the fixed electrode 2. The arc horn 6 is made of an arc-resistant metal and is electrically connected to the fixed electrode 2 through the arc horn support member 5. Although not shown in FIG. 6, the support insulator 1 includes a case portion formed so as to accommodate the fixed electrode 2 together with the contact pressure spring and the arc horn, and an arc extinguishing portion formed on the upper portion of the case portion. An arc-extinguishing chamber having is supported. The arc extinguishing portion provided in the upper part of the arc extinguishing chamber is made of an insulating resin that generates arc extinguishing gas when the arc contacts, and has a size that allows the movable electrode 3 that is in contact with and away from the fixed electrode 2 to pass therethrough. It has a narrow gap arcuate passage and a slit portion communicating with the passage.

  In the switch shown in FIG. 6, the leg on the fixed electrode side of the arc A generated between the two electrodes when the movable electrode 3 is separated from the fixed electrode 2 moves from the fixed electrode 2 to the arc horn 6. The arc transferred to the arc horn 6 is stretched as the movable electrode 3 moves away from the fixed electrode 2 and drawn into a slit portion of a slit arc extinguishing portion (not shown), and the arc extinguishing property generated in the slit portion. It is cooled and disappeared by the gas.

  The switch disclosed in Patent Document 2 also includes an arc horn. However, in the switch disclosed in Patent Document 1, the arc horn is formed so as to surround the fixed electrode, and the end of the arc horn on the movable electrode side is formed. The part is provided with an opening for allowing the movable electrode to enter and exit. The movable electrode performs an operation of contacting the fixed electrode through the opening of the arc horn and an operation of separating from the fixed electrode.

JP 2009-87668 A Japanese Patent Laid-Open No. 2000-173412

  In the air switch shown in Patent Document 1 (see FIG. 6), the arc horn support member 5 is provided to support the arc horn, and the arc horn 6 is screwed to the arc horn support member. There has been a problem that the case part of the arc extinguishing chamber (the part that accommodates the fixed electrode together with the contact pressure spring and the arc horn) becomes large, and the switch becomes large. Further, since it is necessary to attach the arc horn support member and screw the arc horn when assembling the switch, it is inevitable that the number of assembling steps increases and the manufacturing cost increases.

  The switch disclosed in Patent Document 2 also has a problem that the arc horn is formed so as to surround the fixed electrode, so that the case portion of the arc extinguishing chamber becomes large and the switch becomes large.

  An object of the present invention is to provide a slit arc extinguishing type air switch that can reduce the size and cost of the arc extinguishing chamber.

  The present invention rotates the arcuate path between a fixed electrode held by a support insulator, a closing position in contact with the fixed electrode, and an open position in a state away from the fixed electrode. A movable electrode, a contact pressure spring that is disposed outside the fixed electrode and urges the fixed electrode in a state of being attached to the fixed electrode in order to obtain a contact pressure between the fixed electrode and the movable electrode, An arc horn disposed in the vicinity of the fixed electrode to move the leg of the fixed electrode side of the arc generated between the two electrodes when the movable electrode is separated from the fixed electrode, and the fixed electrode with the contact pressure spring and The present invention is directed to a slit arc-extinguishing air switch having an arc extinguishing chamber having a case portion accommodated together with an arc horn and a slit arc extinguishing portion arranged along an arcuate path of the movable electrode.

  In the present invention, the arc horn is fixed to a contact pressure spring, which is an essential component of the switch, without providing a special support member for supporting the arc horn.

  If comprised as mentioned above, it is not necessary to provide the support member for supporting an arc horn specially, and if the arc horn itself has the minimum size necessary to hold the legs of the arc, Therefore, the case portion of the arc extinguishing chamber that accommodates the fixed electrode together with the contact pressure spring and the arc horn can be configured to be small, and the slit arc extinguishing air switch can be miniaturized.

  In a preferred embodiment of the present invention, the arc horn is formed by a plate-shaped or bar-shaped arc horn forming member welded to the tip of the contact pressure spring.

  When configured as described above, the arc horn can be attached to the contact pressure spring when the contact pressure spring is manufactured, and it is not necessary to screw the arc horn when assembling the switch. The manufacturing cost can be reduced by reducing the number of assembly steps.

  In another preferred embodiment of the present invention, the arc horn is formed by a plate-shaped arc horn forming portion that is integrally formed at the tip of the contact pressure spring and bent to stand on the opposite side of the fixed electrode.

  When configured as described above, the arc horn can be formed when the contact pressure spring is manufactured. Therefore, when assembling the switch, the work of screwing the arc horn is not required. Reduction in manufacturing cost can be achieved.

  In the air switch that is the subject of the present invention, the fixed electrode usually has a pair of plate-like electrode pieces arranged opposite to each other, and the tip ends of the pair of electrode pieces are folded back to the inside to move. The movable electrode has a configuration in which a pair of contact portions that are in contact with the electrode is formed, and the movable electrode is configured by a blade-shaped electrode that is in contact with the fixed electrode while being inserted between the pair of contact portions of the fixed electrode. The contact pressure spring has a pair of plate-like spring pieces that are fixed to the support insulator and arranged along the outer surfaces of the pair of electrode pieces of the fixed electrode. It arrange | positions at the outer peripheral side of an arc-shaped channel | path.

  When the switch has the basic configuration as described above, the arc horn is a plate-shaped or bar-shaped arc that is shifted to the outer peripheral side of the arc-shaped passage of the movable electrode and welded to the tip of one spring piece of the contact pressure spring. A horn forming member can be used.

  When the switch has the basic configuration as described above, the arc horn is also formed integrally with the tip of one spring piece of the contact pressure spring so as to move toward the outer peripheral side of the arcuate passage of the movable electrode, and the fixed electrode It is comprised by the plate-shaped arc horn formation part bent and stood up to the opposite side.

  When the switch has the basic configuration as described above, the arc horn is provided so as to extend along the width direction of the fixed electrode and is welded to the tip of one spring piece of the contact pressure spring. The arc horn forming member can be used.

  When the switch has the basic configuration as described above, the arc horn is provided integrally with the tip of one spring piece of the contact pressure spring so as to extend along the width direction of the fixed electrode, and is opposite to the fixed electrode. It can also be constituted by a plate-shaped arc horn forming portion bent up and standing.

  According to the present invention, since the arc horn is fixed to the contact pressure spring which is an essential component of the switch, it is not necessary to provide a special support member for supporting the arc horn. Since it is only necessary to have the minimum necessary size to hold the arc leg, the case portion of the arc extinguishing chamber for accommodating the fixed electrode together with the contact pressure spring and the arc horn should be made small. Therefore, it is possible to reduce the size of the slit arc extinguishing air switch.

  In the present invention, when the arc horn is attached to the tip of the contact pressure spring by welding, the arc horn can be attached at the stage of manufacturing the contact pressure spring, and the arc horn is screwed when assembling the switch. Therefore, it is possible to reduce the manufacturing cost by reducing the number of switch assembly steps.

  In the present invention, even when the arc horn is formed by the arc horn forming portion that is formed integrally with the tip of the contact pressure spring and bent to stand on the opposite side of the fixed electrode, the contact pressure spring is also provided. Since the arc horn can be formed at the manufacturing stage and the work of screwing the arc horn is not required when assembling the switch, the assembly cost of the switch is reduced and the manufacturing cost is reduced. Can do.

(A) is the front view which partially showed the structure of the principal part of the slit arc extinguishing type | mold air switch concerning the 1st Embodiment of this invention. (B) is a top view of (A). (A) is a side view showing the unit on the fixed electrode side used in the air switch shown in FIG. 1 as seen from the left side in FIG. 1 (A), and (B) is seen from above from (A). FIG. (A) is a side view of the contact pressure spring used in the second embodiment of the present invention, (B) is a top view of (A), and (C) is before the arc horn forming part of the contact pressure spring is bent. It is the top view which showed the state. (A) is a front view which shows the principal part of the 3rd Embodiment of this invention, (B) is a right view of (A). It is a side view which shows the principal part of the 4th Embodiment of this invention. (A) is the front view which showed the structure of the principal part of the conventional slit arc extinguishing type | mold air switch partially, and (B) is the left view of (A).

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIGS. 1A and 1B and FIGS. 2A and 2B show the configuration of the main part of the first embodiment of the present invention. In these figures, reference numeral 10 denotes a switch (not shown). A mounting bracket 11 is fixed to the bottom of the case, 11 is a support lever having one end fixed to the mounting bracket 10 with a bolt 10a, and 12 is a support plate disposed at the other end of the support lever 11. A fixed electrode 13 and a contact pressure spring 14 are attached to the support plate 12, and an arc horn 15 is supported by the contact pressure spring 14. An arc extinguishing chamber 16 and an arc induction member 17 made of a ferromagnetic material are also attached to the support plate 12. Reference numeral 18 denotes a blade-shaped movable electrode formed in a letter shape and having a contact portion 18a at the tip. This movable electrode is operated by an operating mechanism (not shown) so that the contact portion 18a is in contact with the fixed electrode 13. And the open position where the contact portion 18a is separated from the arc-extinguishing chamber 15 away from the arc-extinguishing chamber 15 is rotationally displaced along the arcuate path. In this switch, the support insulator 11, the fixed electrode 13, the contact pressure spring 14, the arc horn 15, the arc extinguishing chamber 16, and the arc induction member 17 constitute a fixed electrode side unit, and the movable electrode 18 and the movable electrode are operated. The movable electrode side unit is configured by an operating mechanism (not shown).

  As shown in FIG. 2, the fixed electrode 13 includes a rectangular bottom plate portion 13 a and a pair of plate-like electrode pieces 13 b and 13 b erected on the same side from two opposite sides of the bottom plate portion 13 a. The pair of contact portions 13c and 13c with which the movable electrode 18 contacts is formed by folding the tips of the pair of electrode pieces 13b and 13b inward. The fixed electrode 13 is made of a metal having high conductivity such as copper.

  The contact pressure spring 14 integrally includes a rectangular substrate portion 14a and a pair of plate-like spring pieces 14b and 14b that are erected on the same side from two opposite sides of the substrate portion 14a. The pieces 14b and 14b are arranged in a state of being attached to the bottom plate portion 13a of the fixed electrode 13 and the outer surfaces of the electrode pieces 13b and 13b, respectively. In the illustrated example, the distal ends of the pair of spring pieces 14b, 14b are bent so as to face each other, so that the distal end portion of the contact pressure spring 14 is outside through the gap between the contact portions 13c, 13c of the fixed electrode 13. A pair of bent portions 14c, 14c are formed so as to cover from above. A gap g is formed between the distal ends of the bent portions 14c and 14c so as to allow the movable electrode 18 that contacts or separates from the fixed electrode (contacts the fixed electrode or leaves the fixed electrode) to pass therethrough. The contact spring 14 is provided with a slit 14d extending from a substantially middle portion of the spring pieces 14b and 14b to the bent portions 14c and 14c, and the fixed electrode 13 is provided with a slit 13d that substantially matches the slit 14d. . The fixed electrode 13 and the contact pressure spring 14 are fastened together by a bolt 19 that passes through the bottom plate portion 13a of the fixed electrode 13 and the substrate portion 14a of the contact pressure spring and is screwed into the support plate 12 to the support insulator 11. It is fixed.

  The arc extinguishing chamber 16 has a case portion 16A that accommodates the fixed electrode 13 together with the contact pressure spring 14 and the arc horn 15, and an arc extinguishing portion 16B disposed along the arcuate path of the movable electrode 18. The arc extinguishing part 16B is formed in a plate-shaped arc extinguishing part constituting block 16B0 projecting from the ceiling part of the case part 16A. The illustrated arc extinguishing part 16B includes an arcuate narrow gap part 16B1 extending along an arcuate path through which the movable electrode 18 contacting and separating from the fixed electrode 13 passes, and an outer peripheral side of the arc of the narrow gap part 16B1 (movable electrode And a slit arc extinguishing portion 16B2 which is disposed on the outer peripheral side of the arc-shaped passage and communicated with the narrow gap portion 16B1. In order to allow the movable electrode 18 to pass through, the gap of the narrow gap portion 16B1 is set slightly larger than the plate thickness of the movable electrode 18.

  In the present invention, the configuration of the slit arc extinguishing portion is arbitrary, but the slit arc extinguishing portion 16B2 of the present embodiment is narrower than the narrow gap portion 16B1 as shown in FIG. It consists of a gap. The slit arc extinguishing portion 16B2 is provided so as to extend in an arc shape together with the narrow gap portion 16B1 on the outer peripheral side of the narrow gap portion 16B1 formed in an arc shape, and the entire inner peripheral portion of the slit arc extinguishing portion 16B2 Is opened in the narrow gap 16B1. The arc extinguishing chamber 16 is formed of an insulating resin material that generates an arc extinguishing gas when heated by an arc.

  The arc induction member 17 is a U-shaped member integrally including side plate portions 17a and 17a and a connecting portion 17b for connecting one end of these side plate portions, and is made of a ferromagnetic material such as iron or ferritic stainless steel. Is formed. The arc guide member 17 has its side plate portions 17a and 17a positioned on the sides of the narrow gap portion 16B1 and the slit arc extinguishing portion 16B2 of the arc extinguishing portion 16B, and the connecting portion 17b on the outer peripheral side of the slit arc extinguishing portion 16B2. The bolt 20 is fitted from the outside to the block 16B0 constituting the arc extinguishing portion 16B in a state of being positioned at the position, and penetrates the side plate portions 17a, 17a and the block 16B0, and the nut 21 screwed into the bolt 20 And is fixed to the block 16B0.

  As shown in FIG. 2, the arc horn 15 has an L-shape integrally including a prismatic base portion 15 a and an arc horn main body portion 15 b bent from one end of the base portion 15 a at right angles to the longitudinal direction of the base portion. Arc horn forming member 15A. In the present embodiment, the arc horn 15 is attached to the bent portion 14c at the tip of the contact pressure spring 14 by welding in a state where the arc horn 15 is shifted toward the slit arc extinguishing portion 16B2.

  In the illustrated arc horn forming member 15A, the longitudinal direction of the base portion 15a is directed to the width direction of the contact pressure spring 14 (width direction of the fixed electrode), and the longitudinal direction of the arc horn main body portion 15b is directed to the contact portion 13c of the fixed electrode 13. In the state facing toward the opposite direction of 13c, it is arranged at a position near the outer peripheral side of the arc-shaped passage of the movable electrode 18, and at the end in the width direction of the bent portion 14c at the tip of one spring piece 14b of the contact pressure spring. Welded.

  In the present specification, a direction (shown in FIG. 2B) perpendicular to both the facing direction of the contact portions 13c and 13c of the fixed electrode 13 and the height direction of the fixed electrode 13 (the direction along the axis of the support insulator). (W direction) is the width direction of the fixed electrode 13. Similarly, a direction (W direction shown in FIG. 2B) perpendicular to both the opposing direction of the bent portions 14c and 14c of the contact pressure spring 14 and the height direction of the contact pressure spring (the direction along the axis of the support insulator). Is the width direction of the contact pressure spring.

  In the air switch of the present embodiment, the fixed electrode side legs of the arc A (see FIG. 1A) generated between the movable electrode 18 and the fixed electrode 13 when the movable electrode 18 is separated from the fixed electrode 13. After Aa is transferred to the arc horn 15 as shown in FIG. 1A, the arc A is stretched in the process of moving the movable electrode 18 away from the fixed electrode, and the magnetic flux generated by the arc current is transferred to the arc induction member 17. The magnetic flux is applied to the arc A by this magnetic flux, and the arc A is drawn toward the slit arc extinguishing portion 16B2. When the arc is drawn into the slit arc extinguishing part, the gas pressure in the slit arc extinguishing part rapidly rises due to the arc extinguishing gas generated when the insulating resin constituting the arc extinguishing chamber 16 is heated by the arc, Arc extinguishing gas is ejected from the narrow arc extinguishing part 16B2 toward the narrow gap part 16B1. Arc A is cooled and extinguished by this gas.

  When the arc horn 15 is fixed to the contact pressure spring 14 that is an essential component of the switch as in the present embodiment, it is not necessary to provide a special support member for supporting the arc horn, and the arc horn itself. Since it is only necessary to have a minimum size necessary for holding the arc leg, the arc extinguishing chamber case portion 16A for accommodating the fixed electrode together with the contact pressure spring and the arc horn should be made small. The slit arc extinguishing air switch can be downsized.

(Second Embodiment)
FIG. 3 shows the configuration of the contact pressure spring 14 used in the second embodiment of the present invention. In the present embodiment, the arc horn 15 is provided at the widthwise end of the bent portion 14c at the tip of the contact pressure spring 14 to be disposed on the outer peripheral side (slit arc extinguishing portion side) of the arc-shaped passage of the movable electrode. It is integrally formed.

  In the present embodiment, as shown in FIG. 3C, the end of the one spring piece 14b of the contact pressure spring 14 protrudes outward from the end in the width direction of the bent portion 14c. L-shaped arc horn forming portion 15A 'having a base portion 15a' and an arc horn body forming portion 15b 'bent at right angles from the tip of the base portion 15a' to the other spring piece side is integrally formed, and the contact pressure spring When bending 14, the arc horn forming portion 15 A ′ is bent along the fold line P shown in FIG. 3C on the side opposite to the fixed electrode 13 (to the slit arc extinguishing portion side). Thus, the arc horn 15 having the base portion 15a and the arc horn main body portion 15b is formed as shown in FIGS. 3 (A) and 3 (B). The illustrated arc horn 15 has its arc horn body 15b extending in a direction perpendicular to the width direction of the contact pressure spring 14 (a direction perpendicular to the moving direction of the arc moved by the arc induction member 17). Is formed. Other configurations are the same as those of the embodiment shown in FIGS.

  Even in the case where the arc horn 15 is configured by the arc horn forming portion 15A ′ formed integrally with the tip of the contact pressure spring 14 and erected on the opposite side to the fixed electrode as in this embodiment, the contact Since the arc horn can be formed at the stage of manufacturing the pressure spring 14 and the work of screwing the arc horn is not required when assembling the switch, the assembly cost of the switch is reduced, and the manufacturing cost is reduced. Reduction can be achieved.

(Third embodiment)
4A and 4B show the main part of the third embodiment of the present invention. In this embodiment, a prismatic support member 30 made of a conductive material is disposed at the end of the support insulator 11, and this support member is connected to a central conductor (not shown) of the support insulator 11. The fixed electrode 13 and the contact pressure spring 14 used in the present embodiment are obtained by removing the bottom plate portion 13a and the substrate portion 14a from the fixed electrode 13 and the contact pressure spring 14 used in the embodiment shown in FIGS. It corresponds to a thing.

  The fixed electrode 13 includes a pair of electrode pieces 13b and 13b disposed so as to face each other in the width direction of the support member 30, and the contact pressure spring 14 is disposed along the outer surface of the electrode pieces 13b and 13b. Spring pieces 14b and 14b. The electrode pieces 13b and 13b and the spring pieces 14b and 14b are fixed to the support member 30 by fastening their bases to the support member 30 with screws 31 and 31, respectively. When the tips of the electrode pieces 13b, 13b constituting the fixed electrode 13 are folded back, contact portions 13c, 13c are formed, and the tips of the spring pieces 14b, 14b of the contact pressure spring 14 are bent at right angles to the other side. As a result, bent portions 14c and 14c are formed.

  In the present embodiment, the arc horn 15 is provided so as to extend along the width direction of the fixed electrode 13 and the contact pressure spring 14, and the tip of the bent portion 14 c at the tip of one spring piece 14 b of the contact pressure spring 14. It consists of a rod-shaped arc horn forming member 15A welded to the part.

  Although not shown, an arc extinguishing chamber having the same structure as the arc extinguishing chamber 16 used in the embodiment shown in FIGS. 1 and 2 is attached to the support member 30.

(Fourth embodiment)
In the fourth embodiment of the present invention, as shown in FIG. 5, the arc horn forming portion formed integrally with the tip of the bent portion 14 c at the tip of one spring piece 14 b of the contact pressure spring 14. A plate-like arc horn 15 extending along the width direction of the fixed electrode 13 and the contact spring 14 (perpendicular to the paper surface of FIG. 5) is formed by bending 15A ′ to the opposite side to the fixed electrode. ing. Other configurations are the same as those of the embodiment shown in FIG.

DESCRIPTION OF SYMBOLS 10 Mounting bracket 10a Bolt 11 Support insulator 12 Support plate 13 Fixed electrode 13a Bottom plate part 13b Electrode piece 13c Contact part 14 Contact pressure spring 14b Spring piece 14c Bending part 15 Arc horn

Claims (7)

A fixed electrode held by a support insulator, and a movable electrode that is rotated along an arcuate path between a closing position in contact with the fixed electrode and an open position in a state away from the fixed electrode; In order to obtain a contact pressure between the fixed electrode and the movable electrode, a contact pressure spring arranged on the outside of the fixed electrode in a state of being attached to the fixed electrode and urging the fixed electrode, and fixing the movable electrode An arc horn arranged in the vicinity of the fixed electrode in order to shift the leg portion of the arc generated between the two electrodes when separated from the electrode, and the fixed electrode together with the contact pressure spring and the arc horn In a slit arc extinguishing type air switch comprising an arc extinguishing chamber having a case portion that performs and a slit arc extinguishing portion disposed along an arcuate path of the movable electrode,
The arc horn is fixedly supported by the contact pressure spring;
A slit arc extinguishing air switch characterized by The arc horn is made of a plate-shaped or rod-shaped arc horn forming member welded to the tip of the contact pressure spring;
The slit arc extinguishing air switch according to claim 1. The arc horn is formed by a plate-shaped arc horn forming portion that is formed integrally with the front end of the contact pressure spring and bent to be opposed to the fixed electrode,
The slit arc extinguishing air switch according to claim 1. The fixed electrode has a pair of plate-like electrode pieces arranged opposite to each other, and a pair of contact portions that are in contact with the movable electrode are formed by folding the tips of the pair of electrode pieces inward. Having a configuration,
The movable electrode comprises a blade-shaped electrode that is in contact with the fixed electrode while being inserted between a pair of contact portions of the fixed electrode,
The contact pressure spring has a pair of plate-like spring pieces that are fixed to the support insulator and arranged along the outer surfaces of the pair of electrode pieces of the fixed electrode,
The slit arc extinguishing part is disposed on the outer peripheral side of the arcuate passage of the movable electrode,
The arc horn is constituted by a plate-shaped or bar-shaped arc horn forming member that is moved to the outer peripheral side of the arc-shaped passage of the movable electrode and welded to the tip of one spring piece of the contact pressure spring. 2. The slit arc extinguishing air switch according to claim 1 characterized by the above. The fixed electrode has a pair of plate-like electrode pieces arranged opposite to each other, and a pair of contact portions that are in contact with the movable electrode are formed by folding the tips of the pair of electrode pieces inward. Having a configuration,
The movable electrode comprises a blade-shaped electrode that is in contact with the fixed electrode while being inserted between a pair of contact portions of the fixed electrode,
The contact pressure spring has a pair of plate-like spring pieces that are fixed to the support insulator and arranged along the outer surfaces of the pair of electrode pieces of the fixed electrode,
The slit arc extinguishing part is disposed on the outer peripheral side of the arcuate passage of the movable electrode,
The arc horn is formed to be integral with the tip of one spring piece of the contact pressure spring, and is bent up to the opposite side of the fixed electrode and raised up to the outer peripheral side of the arc-shaped passage of the movable electrode. The slit arc extinguishing air switch according to claim 1, comprising a plate-shaped arc horn forming portion. The fixed electrode has a pair of plate-like electrode pieces arranged opposite to each other, and a pair of contact portions that are in contact with the movable electrode are formed by folding the tips of the pair of electrode pieces inward. Having a configuration,
The movable electrode comprises a blade-shaped electrode that is in contact with the fixed electrode while being inserted between a pair of contact portions of the fixed electrode,
The contact pressure spring has a pair of plate-like spring pieces that are fixed to the support insulator and arranged along the outer surfaces of the pair of electrode pieces of the fixed electrode,
The slit arc extinguishing part is disposed on the outer peripheral side of the arcuate passage of the movable electrode,
The arc horn is formed of a plate-shaped or bar-shaped arc horn forming member provided so as to extend along the width direction of the fixed electrode and welded to the tip of one spring piece of the contact pressure spring. 2. The slit arc extinguishing air switch according to claim 1 characterized by the above. The fixed electrode has a pair of plate-like electrode pieces arranged opposite to each other, and a pair of contact portions that are in contact with the movable electrode are formed by folding the tips of the pair of electrode pieces inward. Having a configuration,
The movable electrode comprises a blade-shaped electrode that is in contact with the fixed electrode while being inserted between a pair of contact portions of the fixed electrode,
The contact pressure spring has a pair of plate-like spring pieces that are fixed to the support insulator and arranged along the outer surfaces of the pair of electrode pieces of the fixed electrode,
The slit arc extinguishing part is disposed on the outer peripheral side of the arcuate passage of the movable electrode,
The arc horn is integrally provided at the tip of one spring piece of the contact pressure spring so as to extend along the width direction of the fixed electrode, and is bent and raised to the opposite side of the fixed electrode. The slit arc extinguishing air switch according to claim 1, comprising a plate-shaped arc horn forming portion.

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