JP6614507B2 - Contact device and electromagnetic relay - Google Patents

Description

  The present invention relates to a contact device that opens and closes a contact, and an electromagnetic relay.

  Conventionally, a pair of fixed contacts and a pair of movable contacts that move between a closed position that contacts the fixed contacts and an open position that is apart from the fixed contacts are provided, and the movable contacts are moved to move between the pair of fixed contacts. There is a contact device that is short-circuited or opened (for example, see Patent Document 1). The pair of movable contacts are provided on the movable contact. When the movable contact is in the closed position, the pair of fixed contacts is short-circuited (conducted) via the movable contact and the movable contact, and the movable contact is in the open position. In this case, the pair of fixed contacts are open (non-conductive).

JP 2007-287525 A

  When the movable contact leaves the fixed contact, an arc may occur between the movable contact and the fixed contact, and it is desired to extinguish the arc quickly.

  This invention is made | formed in view of the said reason, The objective is to provide the contact device which can extinguish an arc quickly, and an electromagnetic relay, when an arc generate | occur | produces.

A contact device according to an aspect of the present invention is provided with a fixed contact, a closed position in contact with the fixed contact, and an open position away from the fixed contact. A movable contact that moves along the first direction, a container having an inner surface that surrounds the fixed contact and the movable contact, and an arc-extinguishing gas that is disposed on the inner surface of the container and discharges arc-extinguishing gas into the container An arc extinguishing member that is positioned in a second direction orthogonal to the first direction with respect to a region between the movable contact and the fixed contact in the open position. The nozzle further includes a nozzle that is positioned closer to the region than the inner surface and restricts the direction in which the arc-extinguishing gas is discharged in a direction toward the space between the movable contact and the fixed contact.
A contact device according to an aspect of the present invention is provided with a fixed contact, a closed position in contact with the fixed contact, and an open position away from the fixed contact. A movable contact that moves along the first direction, a container having an inner surface that surrounds the fixed contact and the movable contact, and an arc-extinguishing gas that is disposed on the inner surface of the container and discharges arc-extinguishing gas into the container An arc extinguishing member, a wall opposite to the inner surface through the arc extinguishing member, a first connecting piece connecting the wall and the inner surface, and a first connecting piece connecting the wall and the inner surface. And the arc-extinguishing member is positioned in a second direction orthogonal to the first direction with respect to a region between the movable contact and the fixed contact in the open position. And disposed between the first connecting piece and the second connecting piece, and the wall body Serial there is a gap between the arc extinguishing member.

  The electromagnetic relay which concerns on 1 aspect of this invention is an electromagnetic relay provided with the said contact device and an electromagnet apparatus, Comprising: The said electromagnet apparatus is an exciting coil which moves the said needle | mover to a 1st direction. The movable contact is moved in the first direction by the movable element and comes into contact with the fixed contact.

  As described above, in the present invention, when an arc is generated, the arc extinguishing member is heated by the arc, and the arc extinguishing member discharges the arc extinguishing gas into the container surrounding the contact portion (fixed contact, movable contact). To do. Therefore, the pressure of the arc extinguishing gas in the container is increased, and there is an effect that the arc can be extinguished quickly.

It is a schematic block diagram of the contact device of Embodiment 1 of this invention. (A) (b) It is a schematic block diagram of the contact apparatus of another structure same as the above. (A) (b) It is a schematic block diagram of the contact apparatus of Embodiment 2. FIG. It is a schematic block diagram of the contact apparatus of Embodiment 3. It is a schematic block diagram of the contact apparatus of Embodiment 4. It is a schematic block diagram of the contact apparatus of Embodiment 5. It is the upper side figure to which a part including a cover same as the above was expanded. (A) (b) It is the top view which expanded a part including the cover of another structure same as the above. It is a schematic block diagram of the contact apparatus of Embodiment 6. It is a schematic block diagram of the protective film of another structure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Hereinafter, a contact device 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. However, the contact device 1 described below is only an example of the present invention. The present invention is not limited to the following embodiment, and various modifications can be made according to design and the like as long as the technical idea according to the present invention is not deviated from other embodiments. Is possible. In the following description, the upper, lower, left, and right directions in FIG. 1 are described as the upper, lower, left, and right directions, but the purpose of use of the contact device 1 is not limited.

  A schematic configuration diagram of the contact device 1 of the present embodiment is shown in FIG. The contact device 1 according to the present embodiment includes a pair of fixed contacts 10, a pair of movable contacts 11, a pair of contact bases 100 and 101 that support each fixed contact 10, and a movable contact 12 that supports both movable contacts 11. With. In addition, the contact device 1 of the present embodiment forms a contact portion 15 with the fixed contact 10 and the movable contact 11, and includes a container 13 that houses the contact portion 15 and an arc extinguishing member 14 described later. In FIG. 1, an electromagnetic relay 3 composed of the contact device 1 of the present embodiment and an electromagnet device 2 arranged below the contact device 1 is shown. Not included in the component. Further, the contact device 1 is not limited to the use of the electromagnetic relay 3.

  The pair of contact bases 100 and 101 are made of a conductive material, and are formed in a cylindrical shape whose longitudinal direction is the vertical direction. And a pair of contact stand 100,101 is arrange | positioned along with one direction (left-right direction in FIG. 1) in the plane orthogonal to an up-down direction. A fixed contact 10 is provided at the lower end of each of the pair of contact tables 100 and 101. Each of the pair of contact bases 100 and 101 is joined to the container 13 so as to be inserted into a pair of round holes 130 formed in the upper wall of the container 13 described later.

  The movable contact 12 is made of a conductive material and is formed in a rectangular plate shape whose longitudinal direction is the left-right direction. The movable contact 12 is disposed below the pair of contact tables 100 and 101 such that both ends in the longitudinal direction face the lower ends of the pair of contact tables 100 and 101. In the movable contact 12, the movable contact 11 is provided in each part facing the fixed contact 10 provided in each contact stand 100, 101.

  The movable contact 12 is driven in the vertical direction by an electromagnet device 2 described later. As a result, each movable contact 11 provided on the movable contact 12 moves between a closed position in contact with the fixed contact 10 facing each other and an open position away from the fixed contact 10. When the movable contact 11 is in the closed position, that is, when the contact device 1 is closed, the pair of contact bases 100 and 101 are short-circuited via the movable contact 11 and the movable contact 12. When the movable contact 11 is in the open position, that is, when the contact device 1 is open, the pair of contact bases 100 and 101 are opened.

  The container 13 is made of a heat-resistant material made of a ceramic such as aluminum oxide (alumina), silicon carbide (SiC), or aluminum nitride, and is formed of a box having an airtight space inside. The constituent material of the container 13 is not limited to ceramic, and may be made of a resin material such as an epoxy resin or a metal material such as stainless steel (SUS), copper (Cu), or aluminum (Al). In addition, when the container 13 is comprised with a metal material, it is necessary to insulate the container 13 and the fixed contact 10 electrically. Further, when the container 13 is made of a resin material, it needs to have a certain thickness in order to ensure strength and airtightness of the internal space.

  Next, the electromagnet device 2 will be described. The electromagnet device 2 includes a stator 20, a mover 21, a yoke (not shown), an excitation coil 22, a shaft 23, a holder 24, a contact pressure spring 25, and a return spring 26. The electromagnet device 2 may have a coil bobbin (not shown) around which the exciting coil 22 is wound.

  The stator 20 is a fixed iron core formed in a cylindrical shape, and an upper end portion thereof is fixed to the lower wall of the container 13. The mover 21 is a movable iron core formed in a cylindrical shape. The mover 21 has a first position where the upper end surface is in contact with the lower end surface of the stator 20 below the stator 20, and a second position where the upper end surface is separated from the lower end surface of the stator 20. It is configured to be movable between.

  The electromagnet device 2 may include a case (not shown) made of a non-magnetic material and housing the stator 20 and the mover 21. The case is formed in a bottomed cylindrical shape having an open upper surface, and an upper end portion (opening peripheral portion) is fixed to the lower wall of the container 13. Thereby, the case restricts the moving direction of the movable element 21 in the vertical direction and defines the second position of the movable element 21.

  The yoke, together with the stator 20 and the mover 21, forms a magnetic circuit through which the magnetic flux generated when the exciting coil 22 is energized. For this reason, the yoke, the stator 20 and the mover 21 are all made of a magnetic material.

  The exciting coil 22 is disposed in a space surrounded by the yoke. A stator 20 and a mover 21 are disposed inside the excitation coil 22. The electromagnet device 2 attracts the mover 21 by the magnetic flux generated by the excitation coil 22 when the excitation coil 22 is energized and moves it upward. When the energization to the excitation coil 22 is stopped, the mover 21 is moved by the spring force of the return spring 26. Is moved downward.

  The shaft 23 is made of a nonmagnetic material and is formed in a round bar shape with the vertical direction as the longitudinal direction. The shaft 23 transmits the driving force generated by the electromagnet device 2 to the contact device 1. The shaft 23 is inserted through a through-hole 131 formed in the center of the lower wall of the container 13, and the lower end of the shaft 23 is fixed to the mover 21 through the inside of the stator 20 and the return spring 26. . An upper end portion of the shaft 23 is fixed to a holder 24 that holds the movable contact 12.

  The holder 24 includes an upper plate 240 and a lower plate 241 that are provided on both sides of the movable contact 12 in the vertical direction and face each other, and a side plate 242 that connects the peripheral portions of the upper plate 240 and the lower plate 241. doing. Here, the upper plate 240 and the lower plate 241 are each formed in a rectangular plate shape. A pair of side plates 242 are provided so as to connect a pair of sides facing each other on the lower surface of the upper plate 240 and a pair of sides facing each other on the upper surface of the lower plate 241. The upper end portion of the shaft 23 is fixed to the center portion of the lower plate 241. Thereby, the driving force generated in the electromagnet device 2 is transmitted to the holder 24 via the shaft 23. Then, as the mover 21 moves in the vertical direction, the holder 24 moves in the vertical direction.

  The contact pressure spring 25 is disposed between the lower plate 241 of the holder 24 and the movable contact 12 and is a coil spring that biases the movable contact 12 upward. The return spring 26 is a coil spring that is disposed inside the stator 20 and biases the mover 21 downward.

  Below, the basic operation | movement of the electromagnetic relay 3 using the contact apparatus 1 of this embodiment is demonstrated easily.

  First, the state of the electromagnetic relay 3 when the exciting coil 22 is not energized will be described. In this state, the mover 21 of the electromagnet device 2 is in the second position. For this reason, the holder 24 is pulled down via the shaft 23 by the electromagnet device 2. At this time, the holder 24 pushes the movable contact 12 downward by the upper plate 240. Therefore, the movable contact 12 is restricted from moving upward by the upper plate 240, and the movable contact 11 is positioned at an open position away from the fixed contact 10. This state is a state in which the contact device 1 is open, and the pair of contact bases 100 and 101 is in an open state (non-conductive).

  Next, the state of the electromagnetic relay 3 when the exciting coil 22 is energized will be described. In this state, the mover 21 of the electromagnet device 2 is in the first position. For this reason, the holder 24 is pulled upward via the shaft 23 by the electromagnet device 2. Therefore, since the upper plate 240 of the holder 24 moves upward, the movement restriction of the movable contact 12 by the upper plate 240 is released. For this reason, the movable contact 12 is pushed upward by the lower plate 241 of the holder 24 via the contact pressure spring 25, and the movable contact 11 is positioned at a closed position where it contacts the fixed contact 10. This state is a state in which the contact device 1 is closed, and the pair of contact bases 100 and 101 is in a short circuit state (conduction). Further, since the movable contact 12 is biased upward by the contact pressure spring 25, the contact pressure (contact pressure) between the fixed contact 10 and the movable contact 11 can be ensured.

  Here, when the movable contact 11 moves away from the fixed contact 10, an arc may occur between the fixed contact 10 and the movable contact 11. Therefore, in the contact device 1 of the present embodiment, the arc extinguishing member 14 that emits an arc extinguishing gas having an arc extinguishing property when placed in the same space as the contact portion 15 (the fixed contact 10 and the movable contact 11). ing. Specifically, as shown in FIG. 1, the arc-extinguishing member 14 is positioned in the vicinity of the right fixed contact 10 and the movable contact 11, and the fixed contact 10 and the movable contact 11 in the open position in the vertical direction. It is provided on the inner surface of the right wall of the container 13 in the region between the two. The arc extinguishing member 14 is made of a hydrogen occlusion alloy that occludes hydrogen, and has a property of quickly releasing stored hydrogen (arc extinguishing gas) by being heated.

  When an arc is generated between the fixed contact 10 and the movable contact 11, the arc extinguishing member 14 is heated by the heat of the arc, and the arc extinguishing gas (hydrogen) is released from the arc extinguishing member 14. With this arc extinguishing gas, the arc can be rapidly cooled and extinguished quickly. Furthermore, in this embodiment, the contact part 15 (the fixed contact 10 and the movable contact 11) and the arc extinguishing member 14 are accommodated in the container 13 that makes the internal space airtight. Therefore, the arc-extinguishing gas released from the arc-extinguishing member 14 can be filled in the container 13, and the arc-extinguishing performance can be further improved. In addition, the container 13 should just be the structure which surrounds the contact part 15 and the arc-extinguishing member 14, and it is not essential to have an airtight space inside. For example, even if the container 13 is formed in a cylindrical shape having an upper end and a lower end and surrounds only the sides of the contact portion 15 and the arc-extinguishing member 14, when the arc is generated, The pressure of the arc gas becomes high and the arc can be extinguished quickly.

  Furthermore, since the arc extinguishing member 14 is disposed in the vicinity of the fixed contact 10 and the movable contact 11, the arc extinguishing gas that is expelled from the arc extinguishing member 14 is blown onto the arc to extinguish the arc. be able to.

  As described above, the contact device 1 according to the present embodiment includes the contact portion 15 including the fixed contact 10 and the movable contact 11, the arc extinguishing member 14, and the container 13. The movable contact 11 moves between a closed position in contact with the fixed contact 10 and a closed position away from the fixed contact 10. When the arc extinguishing member 14 is heated, the arc extinguishing gas is released. The container 13 surrounds the contact portion 15 and the arc extinguishing member 14.

  Therefore, the contact device 1 according to the present embodiment has the arc extinguishing member in the space inside the container 13 including the contact portion 15 and the arc extinguishing member 14 even when an arc is generated when the movable contact 11 is separated from the fixed contact 10. Arc-extinguishing gas is released from 14. Thereby, the pressure of the arc extinguishing gas in the container 13 becomes high, and the arc can be extinguished quickly.

  The component of the arc extinguishing gas released by the arc extinguishing member 14 is not limited to hydrogen, and may be composed of nitrogen or the like. Moreover, the material which comprises the arc-extinguishing member 14 is not limited to a hydrogen storage alloy, What is necessary is just the material which discharge | emits arc-extinguishing gas by heating. For example, the arc extinguishing member 14 may be made of a resin material such as a phenol resin, a metal material such as a hydrogen storage metal or titanium hydride (TiH), or an inorganic material such as boric acid. The timing at which the arc-extinguishing member 14 releases the arc-extinguishing gas is not limited to the time of heating, and the arc-extinguishing gas may be released even at the time of non-heating.

  In FIG. 1, only one arc extinguishing member 14 is illustrated, but two or more arc extinguishing members 14 may be provided, for example, in the vicinity of the fixed contact 10 and the movable contact 11 on the left side. The arc member 14 may be disposed. Further, the size of the arc extinguishing member 14 is not limited to the size shown in FIG.

  Further, a gas having a higher arc extinguishing performance than air may be enclosed in the container 13 in advance. When the gas inside the container 13 contains a gas having a high arc extinguishing performance, the arc can be extinguished more quickly when the arc is generated. Examples of gas having high arc extinguishing performance include hydrogen and carbon dioxide. For example, when hydrogen is sealed in the gas inside the container 13 in advance, the volume ratio of hydrogen in the air in the container 13 is desirably 50% or more in order to ensure the arc extinguishing effect by hydrogen. In addition, by enclosing hydrogen inside the container 13, it is possible to use the arc extinguishing member 14 of a type suitable for use in hydrogen.

In addition, a gas having a higher dielectric breakdown field strength than air may be enclosed in the container 13 in advance. By including a gas having a high dielectric breakdown electric field strength in the gas inside the container 13, the electrical insulation between the fixed contact 10 and the movable contact 11 can be improved, and the occurrence of an arc itself can be suppressed. An example of a gas having a high dielectric breakdown electric field strength is nitrogen (N ₂ ). For example, when nitrogen is enclosed in the gas inside the container 13 in advance, the arc itself can be suppressed in addition to the arc extinguishing effect of nitrogen. Moreover, in order to ensure the said effect by nitrogen, it is desirable that the volume ratio of nitrogen in the air in the container 13 is 50% or more. Further, by enclosing nitrogen inside the container 13, it is possible to use the arc extinguishing member 14 of a type suitable for use in nitrogen.

  Further, a gas having a lower activity than air may be enclosed in the container 13 in advance. By enclosing a gas having low activity in the container 13, it is possible to use the arc extinguishing member 14 of a kind that can be used only in gas having high reactivity and low activity. Note that examples of gases having low activity include rare gases such as helium (He), argon (Ar), neon (Ne), xenon (Xe), and krypton (Kr), or nitrogen.

  The contact device 1 of the present embodiment constitutes an electromagnetic relay 3 together with a so-called plunger-type electromagnet device 2, but constitutes an electromagnetic relay 5 together with a so-called hinge-type electromagnet device 4 shown below. May be. The electromagnetic relay 5 will be briefly described with reference to FIG.

  As shown in FIGS. 2A and 2B, the electromagnet device 4 includes an exciting coil 40, a fixed iron core 41, a movable iron core 42, a support portion 43, and an armature 44, and is provided in the container 13. The amateur 44 is formed in a rectangular plate shape with a movable iron core 42 provided on the lower surface, a base end portion is supported by a support portion 43 fixed to the container 13, and the movable contact 12 is provided at a distal end portion. The fixed iron core 41 is wound with an exciting coil 40 and is opposed to the movable iron core 42 in the vertical direction. The armature 44 is configured to be rotatable such that the distal end portion moves in the vertical direction with the base end portion as a fulcrum. The armature 44 is provided with a return spring (not shown) that urges the armature 44 upward.

  The movable contact 12 is provided at the distal end portion of the armature 44, and a first position where the movable contact 11 contacts the fixed contact 10 by rotation of the armature 44 and a first position where the movable contact 11 is separated from the fixed contact 10. Move between 2 positions.

  Therefore, when the excitation coil 40 is energized, the movable iron core 42 is attracted to the fixed iron core 41 by the magnetic flux generated by the excitation coil 40, and the movable contact 12 moves to the first position. As a result, the pair of contact bases 100 and 101 are short-circuited (conducted). When the exciting coil 40 is not energized, the movable contact 12 moves to the first position by the spring force of the return spring. Thereby, between a pair of contact stands 100 and 101 is open | released (non-conduction).

(Embodiment 2)
FIG. 3 shows a schematic configuration diagram of the contact device 1 of the present embodiment. In the contact device 1 of the present embodiment, a recess 140 is formed in the arc extinguishing member 14 in addition to the configuration of the contact device 1 of the first embodiment. Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. FIG. 3B is a cross-sectional view of the contact device 1 as viewed from above, and the upper and lower sides in FIG. Further, in FIGS. 3A and 3B, the arc is indicated by A1.

  The arc extinguishing member 14 of the present embodiment is formed so as to continue from the front end to the rear end of the inner surface of the right wall of the container 13. Further, the arc extinguishing member 14 has a concave portion 140 formed on the left surface facing the contact portion 15 (the fixed contact 10 and the movable contact 11). When the arc is generated by the recess 140, the arc is covered with the arc extinguishing member 14, so that the heat of the arc is efficiently transmitted to the arc extinguishing member 14. Furthermore, since the arc extinguishing gas is blown from multiple directions to the arc, the arc extinguishing performance can be further improved.

  The arc extinguishing member 14 may be provided as a part of the container 13. Further, a separate structure (insulating plate or the like) may be provided in the space near the contact portion 15, and the arc extinguishing member 14 may be provided in this structure. Alternatively, a part of the structure may be constituted by the arc extinguishing member 14. Further, when the arc is stretched with an external magnetic field or the like, the arc extinguishing member 14 may be provided so as to cover the stretched arc.

  Other configurations and functions are the same as those in the first embodiment.

(Embodiment 3)
FIG. 4 shows a schematic configuration diagram of the contact device 1 of the present embodiment. In the contact device 1 of this embodiment, the arc extinguishing member 14 is formed in a film shape. Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The arc extinguishing member 14 of the present embodiment is formed in a film shape and is provided on the inner surface of the right wall of the container 13. As a method of forming the arc-extinguishing member 14 in a film shape, when the arc-extinguishing member 14 is made of a metal material, plating, vapor deposition, sputtering, and the like can be given. can give.

  By forming the arc extinguishing member 14 in a film shape, the entire arc extinguishing member 14 can be easily heated, and the amount of heat necessary for generating the arc extinguishing gas can be reduced. Therefore, when the arc is generated, the arc extinguishing member 14 can be heated earlier and the arc extinguishing gas can be released, and the arc can be extinguished more quickly.

  Other configurations and functions are the same as those in the first embodiment. Further, the configuration of the present embodiment may be combined with the configuration of the second embodiment.

(Embodiment 4)
The schematic block diagram of the contact apparatus 1 of this embodiment is shown in FIG. In addition to the configuration of the contact device 1 of the first embodiment, the contact device 1 of the present embodiment includes a nozzle 16 that limits the discharge direction of the arc-extinguishing gas discharged from the arc-extinguishing member 14 to the direction in which the contact portion 15 is located. ing. Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In FIG. 5, the arc is indicated by A1.

  The nozzle 16 is formed in a cylindrical shape, and is provided on the inner surface of the right wall of the container 13 so as to surround the arc extinguishing member 14. The opening of the nozzle 16 faces the contact portion 15 (the fixed contact 10 and the movable contact 11).

  Since the arc extinguishing gas emitted from the arc extinguishing member 14 is restricted by the nozzle 16 without being diffused, the arc extinguishing gas is blown toward the contact portion 15 and the arc extinguishing gas blowing amount is improved. And when an arc generate | occur | produces, since arc-extinguishing gas is sprayed so that an arc may be parted, arc-extinguishing performance improves. Moreover, since the arc-extinguishing gas is blown toward the contact portion 15, the arc generation itself can be suppressed.

  The nozzle 16 is desirably provided in the vicinity of the arc extinguishing member 14 and may be provided so as to contact the arc extinguishing member 14. The nozzle 16 may be configured integrally with the arc extinguishing member 14.

  Other configurations and functions are the same as those in the first embodiment. The configuration of the present embodiment may be combined with at least one of the configurations of the second and third embodiments.

(Embodiment 5)
FIG. 6 shows a schematic configuration diagram of the contact device 1 of the present embodiment. In addition to the configuration of the contact device 1 of the first embodiment, the contact device 1 of the present embodiment includes a cover 17 that covers the arc extinguishing member 14. Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In FIG. 6, the arc is indicated by A1.

  FIG. 7 shows an enlarged top view of a part of the contact device 1 including the cover 17. As shown in FIGS. 6 and 7, the cover 17 is provided on the inner surface of the right wall 132 (second wall body) of the container 13 so as to be separated from the arc extinguishing member 14. Specifically, the cover 17 is interposed between the contact portion 15 and the arc extinguishing member 14 and has a wall body 170 (first wall body) having a larger area than the arc extinguishing member 14 and the front end of the wall body 170. And connecting pieces 171 and 172 that connect the rear end portion and the inner surface of the right wall 132. That is, the cover 17 is formed in a half-square cylinder shape having an upper end and a lower end opened, and forms a space surrounded by the cover 17 and the right wall 132 of the container 13. The arc extinguishing member 14 is provided on the inner surface of the right wall 132 so as to be located in a part of the space surrounded by the cover 17 and the right wall 132. Accordingly, a gap 173 is formed between the cover 17 and the arc extinguishing member 14.

  When the arc is generated, the arc extinguishing gas is released from the arc extinguishing member 14. At this time, since the arc-extinguishing member 14 is provided in a space surrounded by the cover 17 and the right wall 132, the pressure of the arc-extinguishing gas in the gap 173 with the cover 17 is locally increased. Furthermore, since the cover 17 is formed in a half-square tube shape with the upper end and the lower end opened, an arc can be passed through the gap 173. That is, the arc extinguishing performance can be improved by passing the arc through the gap 173 where the arc extinguishing gas pressure is locally high. Note that the arc can be easily passed through the gap 173 by using an external magnetic field or the like to stretch the arc in the direction in which the cover 17 is present.

  6 and 7, the arc extinguishing member 14 is provided on the inner surface of the right wall 132 of the container 13, but may be provided on the right surface of the wall body 170 of the cover 17.

  The shape of the cover 17 is not limited to the above, and the arc extinguishing member 14 may be provided in a part of the space formed between the cover 17 and the right wall 132. For example, as illustrated in FIG. 8A, the cover 17 may be configured by only the wall body 170, and the wall body 170 may be provided on the left surface of the arc extinguishing member 14. In this case, the area of the wall 170 is larger than the area of the arc extinguishing member 14, and a space 174 in which the arc extinguishing member 14 is not formed is formed in the space between the wall 170 and the right wall 132. Since the pressure of the arc extinguishing gas can be locally increased in the gap 174, the same effect as described above can be obtained.

  Furthermore, as shown in FIG. 8B, a through-hole 141 that penetrates the arc extinguishing member 14 in the vertical direction may be formed. Since the through-hole 141 is formed in the arc-extinguishing member 14, the pressure of the arc-extinguishing gas inside the through-hole 141 can be further increased, and the arc-extinguishing performance can be further improved by allowing the arc to pass through the through-hole 141. Can be improved.

  Other configurations and functions are the same as those in the first embodiment. In addition, the configuration of the present embodiment may be combined with at least one of the configurations of the second to fourth embodiments.

(Embodiment 6)
FIG. 9 shows a schematic configuration diagram of the contact device 1 of the present embodiment.

  The contact device 1 of the present embodiment includes a protective film 18 that protects the arc extinguishing member 14 in addition to the configuration of the contact device 1 of the first embodiment. Other configurations are the same as those of the first embodiment, and the same configurations as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  The protective film 18 is made of a plate material made of a metal material, and is provided on the entire left surface of the arc extinguishing member 14 facing the contact portion 15 (the fixed contact 10 and the movable contact 11). The protective film 18 can easily prevent the arc-extinguishing member 14 from being consumed by preventing arc contact (commutation) with the arc-extinguishing member 14.

  The protective film 18 is not limited to a plate material, and may be formed in a mesh shape. The constituent material of the protective film 18 is not limited to a metal material, but is a ceramic material, a resin material such as epoxy, polyimide, polytetrafluoroethylene, an aluminum oxide, silicon carbide, a zirconium-based oxide, or a material thereof. You may be comprised with the composite material. Further, in order to transmit the heat of the arc to the arc extinguishing member 14, it is desirable that the protective film 18 has high thermal conductivity and heat resistance.

  Further, it is necessary to secure a discharge path for the arc-extinguishing gas released from the arc-extinguishing member 14, and in this embodiment, the protective film 18 is provided only on the left surface of the arc-extinguishing member 14. In the case where the protective film 18 is formed in a porous material or a mesh shape that can transmit the arc extinguishing gas, the protective film 18 may be provided so as to cover the entire arc extinguishing member 14.

  Further, as shown in FIG. 10, one or more through holes 180 may be formed in the protective film 18. The through hole 180 is formed in the thickness direction of the protective film 18. The arc extinguishing gas emitted from the arc extinguishing member 14 can be blown out to the contact portion 15 (the fixed contact 10 and the movable contact 11), that is, the arc through the through hole 180 to extinguish the arc. In order to blow the arc-extinguishing gas so as to divide the arc, it is desirable that the direction of the through hole 180 is orthogonal to the moving direction (vertical direction) of the movable contact 11. The opening shape of the through hole 180 is not limited to a circular shape or a square shape. Further, as shown in FIG. 10, the area of the protective film 18 may be larger than the area of the arc extinguishing member 14.

  In addition, when forming the protective film 18 with the porous material which can permeate | extinguish an arc-extinguishing gas, you may form a recessed part in the surface. In this case, since the bottom of the concave portion is thin and easy to transmit the arc-extinguishing gas, the arc can be extinguished by blowing the arc-extinguishing gas to the arc through the concave portion, similarly to the configuration in which the through-hole 180 is formed. .

  Other configurations and functions are the same as those in the first embodiment. In addition, the configuration of the present embodiment may be combined with at least one of the configurations of the second to fifth embodiments.

  A contact device according to an aspect of the present invention is heated by a fixed contact and a contact portion configured by a movable contact that moves between a closed position that contacts the fixed contact and an open position that is separated from the fixed contact. An arc extinguishing member that emits arc extinguishing gas having arc extinguishing properties, and a container surrounding the contact portion and the arc extinguishing member, the arc extinguishing member being in the open position with the fixed contact The region between the movable contact and the movable contact is arranged in a direction of a force applied to a current flowing between the fixed contact and the movable contact by an external magnetic field.

  In this contact device, it is preferable that the container has an internal space including the contact portion and the arc extinguishing member in an airtight state.

  In this contact device, the container preferably contains hydrogen.

In this contact device, the volume ratio of hydrogen in the container is preferably 50% or more.

  In this contact device, the inside of the container preferably contains nitrogen.

  In this contact device, the volume ratio of nitrogen inside the container is preferably 50% or more.

  In this contact device, it is preferable that a gas having a lower activity than air is contained in the container.

  In this contact device, it is preferable that the inside of the container is a gas having a higher breakdown field strength than air.

  In this contact device, it is preferable that the container contains a gas having a higher arc extinguishing performance than air.

  In this contact device, it is preferable that the arc extinguishing member has a recess formed on a surface facing the contact portion.

  In this contact device, the arc extinguishing member is preferably formed in a film shape.

  In the contact device, it is preferable that a nozzle is provided that limits a discharge direction of the arc extinguishing gas discharged from the arc extinguishing member to a direction in which the contact portion is located.

  In this contact device, a first wall body provided between the contact portion and the arc-extinguishing member, and a second wall body facing the first wall body via the arc-extinguishing member. Preferably, the arc extinguishing member is provided in a part of a space formed between the first wall body and the second wall body.

  In this contact device, the arc extinguishing member is preferably formed with a through hole.

  In this contact device, it is preferable that the arc extinguishing member is provided with a protective film on a surface facing the contact portion.

  In this contact device, it is preferable that a through hole is formed on the surface of the protective film.

  In this contact device, it is preferable that the protective film is made of a porous material and has a recess formed on the surface.

DESCRIPTION OF SYMBOLS 1 Contact apparatus 2 Electromagnet apparatus 3 Electromagnetic relay 10 Fixed contact 11 Movable contact 12 Movable contact 13 Container 14 Arc extinguishing member 15 Contact part 100,101 Contact stand

Claims (11)

  A fixed contact;
  A movable contact that is located in a first direction with respect to the fixed contact, and that moves along a first direction between a closed position that contacts the fixed contact and an open position that is separated from the fixed contact; ,
  A container having an inner surface surrounding the fixed contact and the movable contact;
  An arc-extinguishing member disposed on the inner surface of the container and emitting arc-extinguishing gas into the container;
  With
  The arc extinguishing member is located in a second direction orthogonal to the first direction with respect to a region between the movable contact and the fixed contact in the open position, and is located in the region more than the inner surface. Located near
  A nozzle that restricts a direction in which the arc-extinguishing gas is released in a direction between the movable contact and the fixed contact;
  Contact device.   A fixed contact;
  It is located in the first direction with respect to the fixed contact, and the closed position and the front contacting the fixed contact
A movable contact moving along the first direction between an open position away from the fixed contact;
  A container having an inner surface surrounding the fixed contact and the movable contact;
  An arc-extinguishing member disposed on the inner surface of the container and emitting arc-extinguishing gas into the container;
  A wall facing the inner surface through the arc extinguishing member;
  A first connecting piece for connecting the wall and the inner surface;
  A second connecting piece for connecting the wall and the inner surface;
  With
  The arc extinguishing member is
    The region between the movable contact and the fixed contact in the open position is located in a second direction orthogonal to the first direction,
    And disposed between the first connecting piece and the second connecting piece,
    There is a gap between the wall and the arc extinguishing member,
  Contact device.   A nozzle that restricts a direction in which the arc-extinguishing gas is released in a direction between the movable contact and the fixed contact;
  The contact device according to claim 2.   The arc extinguishing member is formed in a concave shape along the inner surface,
  The contact apparatus of any one of Claims 1-3.   The arc extinguishing member is formed in a concave shape surrounding a gap between the movable contact and the fixed contact in the open position.
  The contact device according to claim 4.   A protective film provided on a surface opposite to the inner surface of the arc extinguishing member,
  The contact device of any one of Claims 1-5.   The arc extinguishing member and the inner surface are made of different materials.
  The contact device of any one of Claims 1-6.   A part of the arc extinguishing member or a member supporting the arc extinguishing member is in contact with the inner surface;
  The contact apparatus of any one of Claims 1-7.   The arc extinguishing member is disposed in a direction in which an arc generated between the fixed contact and the movable contact is extended with respect to the region.
  The contact device according to claim 1.   The fixed contact is one of a pair of fixed contacts,
  The second direction is a direction connecting the pair of fixed contacts.
  The contact device of any one of Claims 1-9.   An electromagnetic relay comprising the contact device according to any one of claims 1 to 10 and an electromagnet device,
  The electromagnet device is
    A mover,
    An exciting coil for moving the mover in a first direction;
  Have
  The movable contact is moved in the first direction by the mover and contacts the fixed contact.
  Electromagnetic relay.

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