WO2013136713A1 - 開閉器 - Google Patents
開閉器 Download PDFInfo
- Publication number
- WO2013136713A1 WO2013136713A1 PCT/JP2013/001320 JP2013001320W WO2013136713A1 WO 2013136713 A1 WO2013136713 A1 WO 2013136713A1 JP 2013001320 W JP2013001320 W JP 2013001320W WO 2013136713 A1 WO2013136713 A1 WO 2013136713A1
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- WO
- WIPO (PCT)
- Prior art keywords
- contact
- pair
- plate portion
- terminal
- movable
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
- H01H33/565—Gas-tight sealings for moving parts penetrating into the reservoir
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/025—Terminal arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/10—Electromagnetic or electrostatic shielding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/64—Protective enclosures, baffle plates, or screens for contacts
- H01H1/66—Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2223/00—Casings
- H01H2223/002—Casings sealed
- H01H2223/006—Purge gas
Definitions
- the present invention relates to a switch in which an arc extinguishing container is provided with a stationary contact and a movable contact disposed so as to be able to contact and separate from the stationary contact.
- a terminal is inserted into a terminal hole provided in a metal housing, and the sealing material is injected, solidified, and sealed.
- a sealing structure for terminals used in switching devices such as electromagnetic relays, switches, timers, etc., which open and close a circuit having a linear expansion coefficient equal to or greater than that of the metal housing by adding an inorganic filler to the polymer (for example, , See Patent Document 1).
- an insulating case is disposed in a cylindrical sealing case block, and a sealing cover is disposed at the upper end of the sealing case block.
- a terminal hole is formed in the cover, and in a state where the terminal is disposed in the terminal hole, a sealing material is injected between the terminal hole and the terminal to be solidified.
- a first aspect of a switch according to the present invention includes a pair of fixed contacts arranged at a predetermined interval on an arc extinguishing container and a pair of fixed contacts.
- This is a switch equipped with a movable contact that is detachably disposed.
- the arc-extinguishing container has a terminal holding plate part for adhering and holding a pair of external connection terminals constituting the pair of fixed contacts, and a side plate part extending downward from the outer peripheral part of the terminal holding plate part,
- a metal container having a resin container having an open surface opposite to the terminal holding plate part, and a pair of fixed and movable contacts inserted into the side plate part of the resin container and having a lower end opened. It is constituted by adhering the state body with an adhesive.
- the synthetic resin alone has many slow leaks compared to the ceramics that are normally used, but by arranging a metal bowl inside the resin container, Leakage performance equivalent to ceramics can be provided.
- the resin container and the rod-shaped body are bonded with an adhesive, it is not necessary to apply pressure as in the case of sealing agent injection, and the resin container and the rod-shaped body can be easily bonded.
- the terminal holding plate portion communicates with the pair of terminal insertion holes and the pair of terminal insertion holes from the bottom surface through the pair of external connection terminals.
- a pair of annular protrusions that are formed to protrude and are fitted into a pair of terminal insertion holes formed in the top plate of the bowl-shaped body.
- the pair of terminal insertion holes through which the external connection terminals are inserted into the terminal holding plate portion of the resin container and the terminal insertion holes formed in the bowl-shaped body are fitted to the pair of terminal insertion holes.
- a pair of annular protrusions are formed. Then, the pair of external connection terminals can be insulated from the metal hook-shaped body by fitting the annular protrusion into the terminal insertion hole of the hook-shaped body.
- an insulating cylinder that forms an arc-extinguishing chamber surrounding the pair of fixed contacts and the movable contacts is disposed on the inner surface of the bowl-shaped body. ing. According to the third aspect, since the insulating cylinder is arranged on the inner surface of the metal bowl-like body, the insulating cylinder is generated when the movable contact is separated from the pair of fixed contacts. An arc extinguishing chamber for extinguishing the arc can be formed.
- the pair of terminal insertion holes in the terminal holding plate portion of the resin container are formed with tapered portions that gradually increase in diameter from the outer surface side toward the inner surface side.
- an adhesive injection portion having a wedge-shaped cross section is formed between the external connection terminals.
- a taper part is formed in a pair of terminal penetration hole formed in the terminal holding board part of the resin container, and the adhesive injection
- a taper portion whose opposing length gradually increases from the terminal holding plate portion toward the open surface is formed on the inner surface of the side plate portion of the resin container.
- a wedge-shaped adhesive injection portion is formed between the side surfaces of the bowl-shaped body.
- an adhesive injection portion having a wedge-shaped cross section is formed between the side plate section and the side surface of the bowl-shaped body.
- the present invention it is possible to provide a leakage performance equivalent to that of ceramics by arranging a metal bowl inside the resin container.
- the resin container and the rod-shaped body are bonded with an adhesive, it is not necessary to apply pressure as in the case of sealing agent injection, and the resin container and the rod-shaped body can be easily bonded. Therefore, the arc extinguishing container of the switch can be easily formed.
- FIG. 3 is a cross-sectional view taken along line AA in FIG. 2.
- FIG. 1 is a perspective view showing an overall configuration when the present invention is applied to an electromagnetic switch
- FIG. 2 is a longitudinal sectional view of FIG. 1
- FIG. 3 is a perspective view showing a resin container
- FIG. 4 is a perspective view showing a bowl-shaped body.
- reference numeral 10 denotes an electromagnetic contactor as a switch.
- the electromagnetic contactor 10 includes a contact device 100 having a contact mechanism disposed therein and an electromagnet unit 200 that drives the contact device 100. ing.
- the contact device 100 includes an arc extinguishing container 102 that houses the contact mechanism 101.
- the arc extinguishing container 102 includes a resin container 103 in which a synthetic resin is injection-molded, and a metal bowl 104 that is inserted into the resin container 103.
- the resin container 103 has a relatively thick terminal holding plate portion formed with terminal insertion holes 103a and 103b through which a pair of fixed contacts 111 and 112, which will be described later, are inserted at predetermined intervals.
- 103c and a rectangular cylindrical side plate portion 103d extending downward integrally from the outer peripheral portion of the terminal holding plate portion 103c.
- Each of the terminal insertion holes 103a and 103b formed in the terminal holding plate portion 103c has a cylindrical support surface having an inner diameter substantially equal to the outer diameter of the column portion of the external connection terminal 114 constituting the pair of fixed contacts 111 and 112 on the upper end side. 103e.
- Each of the terminal insertion holes 103a and 103b is formed with a tapered portion 103f that is connected to the lower end side of the cylindrical support surface 103e and increases in diameter as it goes downward.
- An adhesive injection portion 103g having a wedge-shaped cross section is formed between the tapered portion 103f and the external connection terminal 114.
- positioning pieces 103h that protrude slightly inward at intervals of 90 degrees are formed on the upper surface side of the terminal insertion holes 103a and 103b.
- the positioning piece 103h can prevent rotation about the central axis of the external connection terminal 114 by engaging an engagement groove 114d formed in the external connection terminal 114 described later.
- an annular ring rib 103i that slightly protrudes downward is formed on the lower surface side of the terminal insertion holes 103a and 103b.
- the side plate portion 103d has a vertical surface-like fitting surface 103j on the upper end side where the inner peripheral surface is in contact with the terminal holding plate portion 103c, and is opposed to the opposite surface as it goes downward toward the lower end side of the fitting surface 103j.
- a tapered portion 103k having a large opposing length is formed to be connected.
- An adhesive injection portion 103m having a wedge-shaped cross section is formed between the taper portion 103k and a side plate portion 104b of the flange 104 described later.
- the bowl-shaped body 104 is formed by integrally molding a metal such as stainless steel or aluminum. As shown in FIG. 4, the bowl 104 includes a substantially rectangular top plate portion 104a, a rectangular tube side plate portion 104b extending downward from the outer peripheral side of the top plate portion 104a, and the side plate portion 104b. And a flange portion 104c that protrudes outward from the lower end surface.
- a terminal insertion hole 104d into which the pair of annular ribs 103i of the resin container 103 are fitted is formed in the top plate portion 104a.
- the flange portion 104c of the bowl-shaped body 104 is fixed in an airtight state to the upper surface of the outer peripheral side of the upper magnetic yoke 210 of the electromagnet unit 200, which will be described later, by brazing or seal joining by welding. Then, the bowl-shaped body 104 is inserted into the side plate portion 103 d of the resin container 103. By injecting the adhesive into the wedge-shaped adhesive injection portion 103m formed between the tapered portion 103k of the side plate portion 103d of the resin container 103 and the side plate portion 104b of the bowl-shaped body 104, the resin is solidified. The container 103 and the bowl-shaped body 104 are integrated while maintaining airtightness.
- the contact mechanism 101 includes a pair of fixed contacts 111 and 112 that are inserted and fixed to the terminal insertion holes 103a and 103b of the terminal holding plate portion 103c of the resin container 103.
- each of the fixed contacts 111 and 112 has an external flange portion 114a that protrudes outward at the upper end inserted into the terminal insertion holes 103a and 103b of the terminal holding plate portion 103c.
- a connection terminal 114 and a C-shaped portion 115 connected to the external connection terminal 114 and arranged symmetrically with the inner side open on the lower surface side of the terminal holding plate portion 103c are provided.
- the C-shaped portion 115 includes an upper plate portion 116 that extends outward along the lower surface of the terminal holding plate portion 103c, an intermediate plate portion 117 that extends downward from an outer end portion of the upper plate portion 116, and the intermediate plate.
- the external connection terminal 114 and the C-shaped portion 115 are formed with a pin 114 c protruding from the lower end surface of the external connection terminal 114 on the upper plate portion 116 of the C-shaped portion 115.
- it is fixed by brazing while being inserted into the through-hole 120 formed.
- the fixing of the external connection terminal 114 and the C-shaped portion 115 is not limited to brazing, but the pin 114c is fitted into the through hole 120, a male screw is formed on the pin 114c, and a female screw is formed on the through hole 120. The two may be screwed together.
- an insulating cover 121 made of a synthetic resin material that restricts the generation of an arc is attached to each of the C-shaped portions 115 of the fixed contacts 111 and 112. As shown in FIGS. 5A and 5B, the insulating cover 121 covers the inner peripheral surfaces of the upper plate portion 116 and the intermediate plate portion 117 of the C-shaped portion 115. The insulating cover 121 extends upward and outward from the L-shaped plate portion 122 along the inner peripheral surfaces of the upper plate portion 116 and the intermediate plate portion 117, and the front and rear end portions of the L-shaped plate portion 122, respectively.
- the insulating cover 121 is attached to the fixed contacts 111 and 112, as shown in FIGS. 5A and 5B, the insulating cover 121 is attached to the small diameter portion 114b of the external connection terminal 114 of the fixed contacts 111 and 112. It is set as the state which made the fitting part 125 oppose.
- the insulating cover 121 is pushed into the small diameter portion 114 b of the external connection terminal 114, thereby engaging the fitting portion 125 with the small diameter portion 114 b of the external connection terminal 114.
- the resin container 103 and the bowl-shaped body 104 after the fixed contacts 111 and 112 are attached are opened upward with the resin container 103 on the lower side.
- the insulating cover 121 is inserted between the fixed contacts 111 and 112 in a state where the insulating cover 121 is turned upside down with respect to FIGS.
- FIG. 6B in a state where the fitting portion 125 is in contact with the fixed contact supporting insulating substrate 105, as shown in FIG.
- the fitting portion 125 is fitted and fixed to the small diameter portion 114 b of the external connection terminal 114 of the fixed contacts 111 and 112.
- the movable contact 130 is arrange
- FIG. 2 The movable contact 130 is supported by a connecting shaft 131 fixed to a movable plunger 215 of an electromagnet unit 200 described later. As shown in FIG. 2, the movable contact 130 is formed with a recess 132 that protrudes downward in the vicinity of the central connection shaft 131, and a through-hole 133 through which the connection shaft 131 is inserted is formed in the recess 132. Yes.
- the connecting shaft 131 has a flange 131a protruding outward at the upper end.
- the contact spring 134 is inserted into the connecting shaft 131 from the lower end side, and then the through hole 133 of the movable contact 130 is inserted. Then, the upper end of the contact spring 134 is brought into contact with the flange portion 131a, and the movable contact 130 is positioned by, for example, the C ring 135 so as to obtain a predetermined urging force by the contact spring 134.
- the movable contact 130 is in a state in which the contact portions at both ends and the contact portion 118a of the lower plate portion 118 of the C-shaped portion 115 of the fixed contacts 111 and 112 are separated from each other by a predetermined distance.
- the contact portions at both ends are in contact with the contact portion 118a of the lower plate portion 118 of the C-shaped portion 115 of the fixed contacts 111 and 112 with a predetermined contact pressure by the contact spring 134 at the closing position. It is set to be.
- an insulating cylinder 140 made of, for example, a synthetic resin is disposed on the inner peripheral surface of the bowl 104 of the arc extinguishing container 102.
- magnet storage pockets 141 and 142 are formed in the insulating cylinder 140 at positions facing the side surfaces of the movable contact 130.
- arc extinguishing permanent magnets 143 and 144 are inserted and fixed.
- the arc extinguishing permanent magnets 143 and 144 are magnetized so that their opposing surfaces have the same polarity, for example, N pole, in the thickness direction. Further, the arc extinguishing permanent magnets 143 and 144 have opposite ends in the left-right direction, as shown in FIG. 7, between the contact portions 118a of the fixed contacts 111 and 112 and the contact portions of the movable contact 130, respectively. It is set to be slightly inside. Arc extinguishing spaces 145 and 146 are formed outside the magnet storage pockets 141 and 142 in the left-right direction, respectively.
- the arc extinguishing permanent magnets 143 and 144 can be brought close to the movable contact 130. Therefore, the magnetic flux ⁇ emerging from the N-pole side of both arc extinguishing permanent magnets 143 and 144 is a contact between the contact portions 118a of the fixed contacts 111 and 112 and the movable contact 130, as shown in FIG. The portion facing the portion 130a is traversed with a large magnetic flux density from the inside to the outside in the left-right direction.
- the direction of the current in the applied state is as shown in FIG. 8B. Then, it flows to the fixed contact 112 through the movable contact 130. Then, when the movable contact 130 is separated from the fixed contacts 111 and 112 upward from the charged state to be released, the contact portion 118a of the fixed contacts 111 and 112 and the contact portion 130a of the movable contact 130 are An arc is generated between them.
- This arc is stretched to the arc extinguishing space 145 side on the arc extinguishing permanent magnet 143 side by the magnetic flux ⁇ from the arc extinguishing permanent magnets 143 and 144.
- the arc extinguishing spaces 145 and 146 are formed wide by the thickness of the arc extinguishing permanent magnets 143 and 144, a long arc length can be taken and the arc can be extinguished reliably.
- the contact portions 118a of the fixed contacts 111 and 112 are disposed.
- the magnetic flux density across the arc is reduced.
- the electromagnet unit 200 includes a U-shaped magnetic yoke 201 that is flat when viewed from the side, and a cylindrical auxiliary yoke 203 is fixed to the center of the bottom plate portion 202 of the magnetic yoke 201. Yes.
- a spool 204 as a plunger driving unit is disposed outside the cylindrical auxiliary yoke 203.
- the spool 204 includes a central cylindrical portion 205 that passes through the cylindrical auxiliary yoke 203, a lower flange portion 206 that protrudes radially outward from the lower end portion of the central cylindrical portion 205, and a little more than the upper end of the central cylindrical portion 205.
- the upper flange portion 207 protrudes radially outward from the lower side.
- An exciting coil 208 is wound around a storage space formed by the central cylindrical portion 205, the lower flange portion 206, and the upper flange portion 207.
- the upper magnetic yoke 210 is fixed between the upper ends of the magnetic yoke 201 serving as the open end.
- the upper magnetic yoke 210 is formed with a through hole 210 a facing the central cylindrical portion 205 of the spool 204 at the central portion.
- a movable plunger 215 having a return spring 214 disposed between the bottom portion and the bottom plate portion 202 of the magnetic yoke 201 is slidably disposed.
- the movable plunger 215 is formed with a peripheral flange portion 216 protruding outward in the radial direction at an upper end portion protruding upward from the upper magnetic yoke 210.
- annular permanent magnet 220 is fixed on the upper surface of the upper magnetic yoke 210 so as to surround the peripheral flange portion 216 of the movable plunger 215.
- the permanent magnet 220 has a through hole 221 that surrounds the circumferential flange 216.
- the permanent magnet 220 is magnetized so that the upper end side is, for example, an N pole and the lower end side is an S pole in the vertical direction, that is, the thickness direction.
- the shape of the through-hole 221 of the permanent magnet 220 can be a shape that matches the shape of the peripheral flange 216, and the shape of the outer peripheral surface can be any shape such as a circle or a rectangle.
- An auxiliary yoke 225 having a through hole 224 having the same outer shape as the permanent magnet 220 and having an inner diameter smaller than the outer diameter of the peripheral flange portion 216 of the movable plunger 215 is fixed to the upper end surface of the permanent magnet 220.
- the peripheral flange 216 of the movable plunger 215 is opposed to the lower surface of the auxiliary yoke 225.
- the permanent magnet 220 is formed in an annular shape, for example, as described in JP-A-2-91901 and US Pat. No. 5,959,519, compared to the case where two permanent magnets are arranged on the left and right objects. The number of parts can be reduced and the cost can be reduced.
- peripheral flange portion 216 of the movable plunger 215 is disposed in the vicinity of the inner peripheral surface of the through-hole 221 formed in the permanent magnet 220, there is no waste in the closed circuit through which the magnetic flux generated by the permanent magnet 220 passes, and the leakage magnetic flux is small. Thus, the magnetic force of the permanent magnet can be used efficiently.
- a connecting shaft 131 that supports the movable contact 130 is screwed to the upper end surface of the movable plunger 215.
- the movable plunger 215 is urged upward by the return spring 214, so that the upper surface of the peripheral flange portion 216 is in the released position where it abuts the lower surface of the auxiliary yoke 225.
- the contact part 130a of the movable contactor 130 is separated upward from the contact part 118a of the fixed contactors 111 and 112, and the current is interrupted.
- the movable plunger 215 is covered with a cap 230 made of a non-magnetic material and formed in a bottomed cylindrical shape, and a flange portion 231 formed to extend radially outward from the open end of the cap 230 has an upper magnetic yoke.
- the lower surface of 210 is sealed and joined.
- a sealed container is formed in which the arc extinguishing container 102 and the cap 230 are communicated with each other via the through hole 210 a of the upper magnetic yoke 210.
- a gas such as hydrogen gas, nitrogen gas, a mixed gas of hydrogen and nitrogen, air, or SF 6 is sealed in a sealed container formed by the arc extinguishing container 102 and the cap 230.
- the fixed contact 111 is connected to a power supply source that supplies a large current, for example, and the fixed contact 112 is connected to a load.
- the exciting coil 208 in the electromagnet unit 200 is in a non-excited state and the electromagnet unit 200 is in a released state in which no exciting force for lowering the movable plunger 215 is generated.
- the movable plunger 215 is urged upward by the return spring 214 away from the upper magnetic yoke 210.
- the attractive force due to the magnetic force of the permanent magnet 220 is applied to the auxiliary yoke 225, and the peripheral flange 216 of the movable plunger 215 is attracted.
- the upper surface of the peripheral flange 216 of the movable plunger 215 is in contact with the lower surface of the auxiliary yoke 225.
- the contact part 130a of the movable contact 130 of the contact mechanism 101 connected to the movable plunger 215 via the connection shaft 131 is spaced apart from the contact part 118a of the fixed contacts 111 and 112 upward by a predetermined distance. .
- the current path between the stationary contacts 111 and 112 is in a disconnected state, and the contact mechanism 101 is in an open state.
- both the urging force by the return spring 214 and the attractive force by the annular permanent magnet 220 are acting on the movable plunger 215, so that the movable plunger 215 is inadvertently caused by external vibration or impact. Therefore, it is possible to reliably prevent malfunction.
- the exciting coil 208 of the electromagnet unit 200 is excited from this released state, an exciting force is generated by the electromagnet unit 200 and the movable plunger 215 is resisted against the urging force of the return spring 214 and the attractive force of the annular permanent magnet 220. Press down.
- a magnetic path is formed between the movable plunger 215 and the bottom plate portion 202 of the magnetic yoke 201 through the cylindrical auxiliary yoke 203. Furthermore, the gap between the lower surface of the peripheral flange portion 216 of the movable plunger 215 and the upper magnetic yoke 210 is smaller than the gap between the outer peripheral surface of the movable plunger 215 and the inner peripheral surface of the through hole 210 a of the upper magnetic yoke 210. It is set small.
- the movable plunger 215 quickly descends against the biasing force of the return spring 214 and the attractive force of the annular permanent magnet 220. Thereby, the lower end of the movable plunger 215 is stopped when the lower surface of the peripheral flange portion 216 contacts the upper surface of the upper magnetic yoke 210.
- the movable contact 130 connected to the movable plunger 215 via the connecting shaft 131 is also lowered, and the contact portion 130a thereof is the contact portion 118a of the fixed contacts 111 and 112. In contact with the contact pressure of the contact spring 134.
- the fixed contactors 111 and 112 have a C-shaped portion 115 formed by the upper plate portion 116, the intermediate plate portion 117, and the lower plate portion 118. A current in the reverse direction flows between the plate portion 118 and the movable contact 130 facing the plate portion 118.
- the movable contact 130 is connected to the contact portion 118a of the fixed contacts 111 and 112 according to the Fleming left-hand rule.
- the pressing Lorentz force can be generated.
- This Lorentz force it becomes possible to resist the electromagnetic repulsion force in the opening direction generated between the contact portions 118a of the fixed contacts 111 and 112 and the contact portion 130a of the movable contact 130, and the contact portion of the movable contact 130 It is possible to reliably prevent the 130a from opening.
- the pressing force of the contact spring 134 that supports the movable contact 130 can be reduced, and the thrust generated by the exciting coil 208 can be reduced accordingly, and the configuration of the entire electromagnetic contactor can be reduced in size. can do.
- the excitation of the excitation coil 208 of the electromagnet unit 200 is stopped.
- the exciting force that moves the movable plunger 215 downward by the electromagnet unit 200 disappears, so that the movable plunger 215 rises by the urging force of the return spring 214, and the annular permanent magnet 216 as the peripheral flange 216 approaches the auxiliary yoke 225.
- the suction force of 220 increases.
- the movable plunger 215 rises the movable contact 130 connected via the connecting shaft 131 rises.
- the movable contact 130 is in contact with the stationary contacts 111 and 112 while the contact pressure is applied by the contact spring 134. After that, when the contact pressure of the contact spring 134 disappears, the movable contact 130 is in a state of opening opening in which it is separated upward from the fixed contacts 111 and 112.
- the upper plate portion 116 and the intermediate plate portion 117 of the C-shaped portion 115 are covered with the insulating cover 121. For this reason, an insulation distance can be ensured by the insulating cover 121 between the both end portions of the movable contact 130 and the upper plate portion 116 and the intermediate plate portion 117 of the C-shaped portion 115, and the movable contact 130 can move in the movable direction.
- the height can be shortened. Therefore, the contact device 100 can be reduced in size.
- the magnetic field generated by the current flowing through the intermediate plate portion 117 is shielded by the magnetic plate 119. .
- the magnetic field generated by the arc generated between the contact portions 118a of the fixed contacts 111 and 112 and the contact portion 130a of the movable contact 130 does not interfere with the magnetic field generated by the current flowing through the intermediate plate portion 117. It is possible to prevent the arc from being affected by the magnetic field generated by the current flowing through the plate portion 117.
- the magnetic flux emitted from this N pole is shown in FIG.
- the arc generating part of the opposing part of the contact part 118a of each arc extinguishing permanent magnet 143 and 144 fixed contactor 111 and the contact part 130a of the movable contactor 130 is the longitudinal direction of the movable contactor 130.
- a magnetic field is formed by reaching the south pole across from the inside to the outside.
- the arc generation part of the contact part 118a of the fixed contactor 112 and the contact part 130a of the movable contactor 130 crosses from the inside to the outside in the longitudinal direction of the movable contactor 130 and reaches the S pole to form a magnetic field. Therefore, the magnetic fluxes of the arc extinguishing permanent magnets 143 and 144 are both between the contact portion 118a of the fixed contact 111 and the contact portion 130a of the movable contact 130, and between the contact portion 118a of the fixed contact 112 and the contact of the movable contact 130.
- the portions 130a cross in the opposite directions in the longitudinal direction of the movable contact 130.
- an arc generated between the contact portion 118a of the fixed contact 111 and the contact portion 130a of the movable contact 130 passes through the arc extinguishing space 145 from the side surface of the contact portion 118a of the fixed contact 111. It is greatly stretched so as to reach the upper surface side of the movable contact 130 and is extinguished. Further, in the arc extinguishing space 145, the magnetic flux is downward and upward with respect to the direction of the magnetic flux between the contact portion 118a of the fixed contact 111 and the contact portion 130a of the movable contact 130 on the lower side and the upper side. Will tilt.
- the arc stretched to the arc extinguishing space 145 by the tilted magnetic flux is further stretched in the direction of the corner of the arc extinguishing space 145, the arc length can be increased, and good interruption performance can be obtained. .
- the current I flows from the movable contact 130 side to the fixed contact 112 side and the magnetic flux ⁇ . Is the right direction from the inside to the outside. Therefore, according to Fleming's left-hand rule, the arc extinguishing space 145 is directed to the arc extinguishing space 145 side perpendicular to the longitudinal direction of the movable contact 130 and perpendicular to the opening / closing direction of the contact portion 118a of the fixed contact 112 and the movable contact 130.
- a large Lorentz force F acts.
- an arc generated between the contact portion 118a of the fixed contact 112 and the movable contact 130 passes through the arc extinguishing space 145 from the upper surface side of the movable contact 130 to the fixed contact 112. It is greatly stretched to reach the side and extinguished. Further, in the arc extinguishing space 145, as described above, on the lower side and the upper side, the lower side and the upper side with respect to the direction of the magnetic flux between the contact part 118a of the stationary contact 112 and the contact part 130a of the movable contact 130 and The magnetic flux is inclined upward.
- the arc stretched to the arc extinguishing space 145 by the tilted magnetic flux is further stretched in the direction of the corner of the arc extinguishing space 145, the arc length can be increased, and good interruption performance can be obtained.
- the electromagnetic contactor 10 is turned on and the regenerative current is flowing from the load side to the DC power source side and the release state is set, the direction of the current in FIG. 8B is reversed. Therefore, the same arc extinguishing function is exhibited except that the Lorentz force F acts on the arc extinguishing space 146 side and the arc is extended to the arc extinguishing space 146 side.
- the arc extinguishing permanent magnets 143 and 144 are arranged in the magnet storage pockets 141 and 142 formed in the insulating cylinder 140, the arc directly contacts the arc extinguishing permanent magnets 143 and 144. There is nothing. For this reason, the magnetic characteristics of the arc extinguishing permanent magnets 143 and 144 can be stably maintained, and the interruption performance can be stabilized.
- the insulating cylindrical body 140 can cover and insulate the inner peripheral surface of the metal cage 104, there is no short circuit of the arc at the time of current interruption, and current interruption can be performed reliably. Furthermore, since the insulating function, the positioning function of the arc extinguishing permanent magnets 143 and 144 and the arc extinguishing permanent magnets 143 and 144 can be protected from the arc by one insulating cylinder 140, the manufacturing cost can be reduced. Can be reduced.
- the C-shaped portion 115 of the fixed contacts 111 and 112 and the contact spring 134 that applies the contact pressure of the movable contact 130 are arranged in parallel.
- the height of the contact mechanism 101 can be reduced as compared with the case where the fixed contact, the movable contact, and the contact spring are arranged in series. For this reason, the contact device 100 can be reduced in size.
- the arc extinguishing container 102 includes a resin container 103 and a metal bowl 104 that is inserted into the side plate portion 103 d of the resin container 103. Further, the resin container 103 and the bowl-shaped body 104 are fixed with an adhesive, and the external connection terminals 114 constituting the fixed contacts 111 and 112 are bonded and held to the terminal holding plate portion 103c of the resin container 103. . For this reason, the resin container 103 and the metal cage 104 can be bonded in an airtight state with an adhesive. For this reason, it is not necessary to apply expensive ceramics as the arc extinguishing container, and the manufacturing cost of the arc extinguishing container 102 can be significantly reduced.
- terminal insertion holes 103a and 103b through which the pair of external connection terminals 114 are inserted are formed in the terminal holding plate portion 103c of the resin container 103.
- An annular rib 103 i is formed on the lower end side of these terminal insertion holes 103 a and 103 b as an annular protrusion that fits into the terminal insertion hole 104 d formed in the top plate part 104 a of the bowl 104. For this reason, the insulation between the external connection terminal 114 and the bowl-shaped body 104 can be ensured by the annular rib 103i.
- the insulation cylinder 140 can be secured on the inner peripheral surface side of the side plate portion 104b of the bowl-shaped body 104 to ensure insulation between the stationary contacts 111 and 112 and the bowl-shaped body 104.
- a taper portion 103 f that gradually increases in diameter downward is formed in the pair of terminal insertion holes 103 a and 103 b of the terminal holding plate portion 103 c constituting the resin container 103, and the taper portion 103 f and the side plate of the bowl-shaped body 104 are formed.
- An adhesive injection portion 103g is formed between the portion 104b. By injecting the adhesive into the adhesive injection portion 103g, the adhesive can be reliably injected and held between the terminal holding plate portion 103c and the external connection terminal 114.
- the terminal holding plate portion 103c and the external connection terminal 114 Can be securely bonded to ensure airtightness.
- an adhesive injection portion 103m having a wedge-shaped cross section is also formed on the inner peripheral surface of the side plate portion 103d of the resin container 103. For this reason, by injecting the adhesive into the adhesive injection portion 103m, the adhesive can be reliably injected and held between the resin container 103 and the bowl 104, and the resin container 103 and the bowl 104 are bonded. To ensure confidentiality.
- the synthetic resin material constituting the resin container 103 has more slow leak of the enclosed gas than ceramics, but when used in combination with a metal rod-like body, leak performance equivalent to ceramics can be ensured. .
- the annular permanent magnet 220 magnetized in the movable direction of the movable plunger 215 is disposed on the upper magnetic yoke 210, and the auxiliary yoke 225 is formed on the upper surface thereof.
- a suction force for sucking the peripheral flange portion 216 of the movable plunger 215 can be generated.
- the movable plunger 215 in the released state can be fixed by the magnetic force of the annular permanent magnet 220 and the urging force of the return spring 214, the holding force against the malfunction impact can be improved.
- the urging force of the return spring 214 can be reduced, and the total load due to the contact spring 134 and the return spring 214 can be reduced. Therefore, it is possible to reduce the attractive force generated in the exciting coil 208 according to the decrease in the total load, and the magnetomotive force of the exciting coil 208 can be reduced. For this reason, the axial length of the spool 204 can be shortened, and the height of the movable plunger 215 of the electromagnet unit 200 in the movable direction can be reduced.
- the overall configuration of the electromagnetic contactor 10 can be greatly shortened and the size can be reduced. Can be planned. Further, by disposing the peripheral flange 216 of the movable plunger 215 in the inner peripheral surface of the annular permanent magnet 220, there is no waste in the closed magnetic path through which the magnetic flux generated from the annular permanent magnet 220 passes, and the permanent magnet is reduced by reducing the leakage magnetic flux. Can be used efficiently.
- the stroke of the movable plunger 215 is movable with the thickness of the annular permanent magnet 220. It can be adjusted by the thickness of the peripheral flange portion 216 of the plunger 215. For this reason, the cumulative number of parts and shape tolerances that affect the stoke of the movable plunger 215 can be minimized.
- the stroke adjustment of the movable plunger 215 is performed only by the thickness of the annular permanent magnet 220 and the thickness of the peripheral flange portion 216 of the movable plunger 215, the stroke variation can be minimized.
- the present invention is not limited to the configuration of the above embodiment.
- a contact mechanism having an arbitrary configuration can be applied.
- an L-shaped portion 160 having a shape in which the upper plate portion 116 in the C-shaped portion 115 is omitted may be coupled to the external connection terminal 114.
- the movable contact 130 may be formed in a flat plate shape without the recess 132.
- the connecting shaft 131 is screwed to the movable plunger 215 .
- the present invention is not limited to screwing, and any connection method can be applied.
- the movable plunger 215 and the connecting shaft can be applied.
- 131 may be integrally formed.
- connection between the connecting shaft 131 and the movable contact 130 forms a flange portion 131a at the tip of the connecting shaft 131, and the lower end of the movable contact 130 is inserted into the C after inserting the contact spring 134 and the movable contact 130.
- it is not limited to this. That is, a positioning large-diameter portion that protrudes in the radial direction is formed at the C-ring position of the connecting shaft 131, and the contact spring 134 is disposed after the movable contact 130 is brought into contact with the positioning large-diameter portion. You may make it fix with a ring.
- the magnetic yoke 201 is formed in a bottomed cylindrical shape as shown in FIGS. 13A and 13B, and the auxiliary yoke 203 is connected to the annular plate portion 203 a along the bottom plate portion 202 of the magnetic yoke 201 and this circle. You may make it comprise with the cylindrical part 203b which rises upwards from the internal peripheral surface of the cyclic
- a through hole 202a is formed in the bottom plate portion 202 of the U-shaped upper magnetic yoke 210, and a convex auxiliary yoke 203 is fitted into the through hole 202a.
- the small diameter portion 203c of the auxiliary yoke 203 may be inserted into the insertion hole 217 formed in the movable plunger 215.
- the sealed container was comprised with the arc-extinguishing container 102 and the cap 230, and the case where gas was enclosed in this sealed container was demonstrated, it is not limited to this, The electric current to interrupt
- the present invention is not limited to the above configuration, and an arc extinguishing permanent magnet may be disposed on the outer peripheral surface of the insulating cylinder 140, and further the arc extinguishing permanent magnets 143 and 144 are omitted. You may do it.
- the rotation prevention of the external connection terminal 114 is constituted by the four positioning pieces 103h formed in the resin container 103 and the engagement groove 114d formed in the external connection terminal 114 engaged therewith.
- the present invention is not limited to the above configuration, and the positioning piece 103h and the engaging groove 114d may be one or a plurality other than four.
- an engagement groove may be formed in the resin container 103 and a protrusion may be formed in the external connection terminal 114.
- the present invention is not limited to this, and the present invention is applied to a switch having an arc extinguishing container such as an electromagnetic relay or a switch. can do.
- the metal bowl-shaped body is disposed inside the resin container, and the resin container and the bowl-shaped body are bonded with an adhesive, so that the resin container and the resin container are provided with leakage performance equivalent to that of ceramics. It is possible to provide a switch that can be easily bonded to the bowl and can easily form an arc extinguishing container.
- Electromagnetic contactor 11 ... Exterior insulation container, 100 ... Contact apparatus, 101 ... Contact mechanism, 102 ... Arc-extinguishing container, 103 ... Resin container, 103a, 103b ... Terminal insertion hole, 103c ... Terminal holding plate part, 103d ... Side plate portion, 103f ... Taper portion, 103g ... Adhesive injection portion, 103k ... Taper portion, 103m ... Adhesive injection portion, 104 ... Bridge-like body, 104a ... Top plate portion, 104b ... Side plate portion, 104c ... Flange portion, 104d ... Terminal insertion hole, 111, 112 ...
- L-shaped part, 200 ... electromagnet unit, 201 ... Magnetic yoke, 203 ... Cylindrical auxiliary yoke, 204 ... Spool, 208 ... Excitation coil, 210 ... Upper magnetic yoke, 214 ... Return spring, 215 ... Movable plunger, 216 ... Circumferential flange, 220 ... Permanent magnet, 225 ... Auxiliary yoke
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Contacts (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
そこで、本発明は、上記従来例の未解決の課題に着目してなされたものであり、消弧容器を容易に形成することができる開閉器を提供することを目的としている。
しかも、樹脂容器と桶状体とを接着剤で接着するので、シール剤の注入のように圧力を掛けて注入する必要がなく、樹脂容器と桶状体とを容易に接着することができる。
この第2の態様によると、樹脂容器の端子保持板部に外部接続端子を挿通する一対の端子挿通孔と、これに連通して、桶状体に形成された端子挿通孔に嵌合される一対の環状突出部とが形成されている。そして、環状突出部を桶状体の端子挿通孔に嵌合させることにより、一対の外部接続端子を金属製の桶状体から絶縁することができる。
この第3の態様によると、金属製の桶状体の内側面に、絶縁筒体が配置されているので、この絶縁筒体によって一対の固定接触子から可動接触子が離間する際に発生するアークを消弧する消弧室を形成することができる。
この第4の態様によると、樹脂容器の端子保持板部に形成された一対の端子挿通孔にテーパー部を形成して、外部接続端子との間に接着剤注入部が形成されている。このため、接着剤注入部に接着剤を注入して固化させることにより、樹脂容器の端子保持板部と一対の外部接続端子との間を強固に接着することができる。
この第5の態様によると、樹脂容器の側板部内に金属製の桶状体を挿通したときに、側板部と桶状体の側面との間に断面楔状の接着剤注入部が形成され、この接着剤注入部に接着剤を注入して固化させることにより、樹脂容器と金属製の桶状体とを接着剤によって確実に固定することができる。
図1は本発明を電磁開閉器に適用した場合の全体構成を示す斜視図、図2は図1の縦断面図、図3は樹脂容器を示す斜視図、図4は桶状体を示す斜視図である。これら図1~図4において、10は開閉器としての電磁接触器であり、この電磁接触器10は接点機構を配置した接点装置100と、この接点装置100を駆動する電磁石ユニット200とで構成されている。
樹脂容器103は、図2で特に明らかなように、所定間隔を保って後述する一対の固定接触子111及び112を挿通する端子挿通孔103a及び103bを形成した比較的厚みの厚い端子保持板部103cと、この端子保持板部103cの外周部から一体に下方に延長する方形筒状の側板部103dとで構成されている。
桶状体104は、ステンレス、アルミニウム等の金属を一体成形して構成されている。この桶状体104は、図4に示すように、略長方形状の天板部104aと、この天板部104aの外周側から下方に延長する角筒状の側板部104bと、この側板部104bの下端面から外方に突出するフランジ部104cとで構成されている。天板部104aには、樹脂容器103の一対の環状リブ103iが嵌合する端子挿通孔104dが形成されている。
絶縁カバー121は、上板部116及び中間板部117の内周面に沿うL字状板部122と、このL字状板部122の前後端部からそれぞれ上方及び外方に延長してC字状部115の上板部116及び中間板部117の側面を覆う側板部123及び124と、これら側板部123及び124の上端から内方側に形成された固定接触子111及び112の外部接続端子114に形成された小径部114bに係合する嵌合部125とを備えている。
次いで、図6(b)に示すように、嵌合部125を固定接点支持絶縁基板105に接触させた状態で、図6(c)に示すように、絶縁カバー121を外側に押し込むことにより、嵌合部125を固定接触子111及び112の外部接続端子114の小径部114bに嵌合させて固定する。
そして、固定接触子111及び112のC字状部115内に両端部を配置するように可動接触子130が配設されている。この可動接触子130は後述する電磁石ユニット200の可動プランジャ215に固定された連結軸131に支持されている。この可動接触子130は、図2に示すように、中央部の連結軸131の近傍が下方に突出する凹部132が形成され、この凹部132に連結軸131を挿通する貫通孔133が形成されている。
因みに、アーク消弧用永久磁石143及び144を、図9(a)~(c)に示すように、絶縁筒体140の外側に配置する場合には、固定接触子111及び112の接点部118aと可動接触子130の接点部130aとの対向位置までの距離が長くなり、本実施形態と同一の永久磁石を適用した場合に、アークを横切る磁束密度が少なくなる。
しかも、アーク消弧用永久磁石143及び144を固定接触子111及び112と可動接触子130の接点部との距離を短くするためには絶縁筒体140の前後方向の奥行きを狭くする必要があり、アークを消弧するための十分なアーク消弧空間を確保することができないという問題点がある。
電磁石ユニット200は、図2に示すように、側面から見て扁平なU字形状の磁気ヨーク201を有し、この磁気ヨーク201の底板部202の中央部に円筒状補助ヨーク203が固定されている。この円筒状補助ヨーク203の外側にプランジャ駆動部としてのスプール204が配置されている。
そして、スプール204の中央円筒部205内に、底部と磁気ヨーク201の底板部202との間に復帰スプリング214を配設した可動プランジャ215が上下に摺動可能に配設されている。この可動プランジャ215には、上部磁気ヨーク210から上方に突出する上端部に半径方向外方に突出する周鍔部216が形成されている。
また、永久磁石220を環状に形成したので、例えば特開平2-91901号公報や米国特許第5959519号明細書に記載されているように永久磁石を左右対象に2つ配置する場合に比較して、部品点数が少なくなってコストダウンが図れる。また、永久磁石220に成形した貫通孔221の内周面近傍に可動プランジャ215の周鍔部216が配置されるため、永久磁石220で生じる磁束を通す閉回路に無駄がなく、漏れ磁束が少なくなり、永久磁石の磁力を効率的に使用することができる。
そして、釈放状態では、可動プランジャ215が復帰スプリング214によって上方に付勢されて、周鍔部216の上面が補助ヨーク225の下面に当接する釈放位置となる。この状態で、可動接触子130の接点部130aが固定接触子111及び112の接点部118aから上方に離間して、電流遮断状態となっている。
今、固定接触子111が例えば大電流を供給する電力供給源に接続され、固定接触子112が負荷に接続されているものとする。
この状態で、電磁石ユニット200における励磁コイル208が非励磁状態にあって、電磁石ユニット200で可動プランジャ215を下降させる励磁力を発生していない釈放状態にあるものとする。この釈放状態では、可動プランジャ215が復帰スプリング214によって、上部磁気ヨーク210から離れる上方向に付勢される。
このため、可動プランジャ215に連結軸131を介して連結されている接点機構101の可動接触子130の接点部130aが固定接触子111及び112の接点部118aから上方に所定距離だけ離間している。このため、固定接触子111及び112間の電流路が遮断状態にあり、接点機構101が開極状態となっている。
この釈放状態から、電磁石ユニット200の励磁コイル208を励磁すると、この電磁石ユニット200で励磁力を発生させて、可動プランジャ215を復帰スプリング214の付勢力及び環状永久磁石220の吸引力に抗して下方に押し下げる。
このように、可動プランジャ215が下降することにより、可動プランジャ215に連結軸131を介して連結されている可動接触子130も下降し、その接点部130aが固定接触子111及び112の接点部118aに接触スプリング134の接触圧で接触する。
このとき、固定接触子111及び112と可動接触子130との間に可動接触子130を開極させる方向の電磁反発力が発生する。
しかしながら、固定接触子111及び112は、図2に示すように、上板部116、中間板部117及び下板部118によってC字状部115が形成されているので、上板部116及び下板部118とこれに対向する可動接触子130とで逆方向の電流が流れることになる。
このローレンツ力によって、固定接触子111及び112の接点部118aと可動接触子130の接点部130a間に発生する開極方向の電磁反発力に抗することが可能となり、可動接触子130の接点部130aが開極することを確実に防止することができる。
この接点機構101の閉極状態から、負荷への電流供給を遮断する場合には、電磁石ユニット200の励磁コイル208の励磁を停止する。
この可動プランジャ215が上昇することにより、連結軸131を介して連結された可動接触子130が上昇する。これに応じて接触スプリング134で接触圧を与えている間は可動接触子130が固定接触子111及び112に接触している。その後、接触スプリング134の接触圧がなくなった時点で可動接触子130が固定接触子111及び112から上方に離間する開極開始状態となる。
このとき、固定接触子111及び112のC字状部115の上板部116及び中間板部117を覆う絶縁カバー121が装着されているので、アークが固定接触子111及び112の接点部118aと可動接触子130の接点部130aとの間のみに発生させることができる。このため、アークの発生状態を安定させることができ、消弧性能を向上させることができる。
したがって、アーク消弧用永久磁石143及び144の磁束がともに固定接触子111の接点部118a及び可動接触子130の接点部130a間と、固定接触子112の接点部118a及び可動接触子130の接点部130a間を可動接触子130の長手方向で互いに逆方向に横切ることになる。
また、アーク消弧空間145では、その下方側及び上方側で、固定接触子111の接点部118a及び可動接触子130の接点部130a間の磁束の向きに対して下方側に及び上方側に磁束が傾くことになる。このため、傾いた磁束によってアーク消弧空間145に引き伸ばされたアークがアーク消弧空間145の隅の方向へさらに引き伸ばされ、アーク長を長くすることができ、良好な遮断性能を得ることができる。
このため、フレミングの左手の法則によって、可動接触子130の長手方向と直交し且つ固定接触子112の接点部118aと可動接触子130との開閉方向と直交してアーク消弧空間145側に向かう大きなローレンツ力Fが作用する。
また、アーク消弧空間145では、上述したように、その下方側及び上方側で、固定接触子112の接点部118a及び可動接触子130の接点部130a間の磁束の向きに対して下方側及び上方側に磁束が傾くことになる。
一方、電磁接触器10の投入状態で、負荷側から直流電源側に回生電流が流れている状態で、釈放状態とする場合には、前述した図8(b)における電流の方向が逆となることから、ローレンツ力Fがアーク消弧空間146側に作用し、アークがアーク消弧空間146側に引き伸ばされることを除いては同様の消弧機能が発揮される。
さらに、絶縁機能、アーク消弧用永久磁石143及び144の位置決め機能及びアーク消弧用永久磁石143及び144のアークからの保護機能を1つの絶縁筒体140で行うことができるので、製造コストを低減させることができる。
さらに、樹脂容器103を構成する端子保持板部103cの一対の端子挿通孔103a,103bに下方に向かって徐々に拡径するテーパー部103fが形成され、このテーパー部103fと桶状体104の側板部104bとの間に接着剤注入部103gが形成されている。この接着剤注入部103gに接着剤を注入することによって、端子保持板部103c及び外部接続端子114間に接着剤を確実に注入保持することができ、端子保持板部103cと外部接続端子114との接着を確実に行って気密性を確保することができる。
また、樹脂容器103を構成する合成樹脂材はセラミックスに比較して封入気体のスローリークが多いが、金属製の桶状体と併用することにより、セラミックスと同等のリーク性能を確保することができる。
このため、釈放状態における可動プランジャ215の固定を環状永久磁石220の磁力と復帰スプリング214の付勢力とで行うことができるので、誤動作衝撃に対する保持力を向上させることができる。
さらに、環状永久磁石220の内周面内に可動プランジャ215の周鍔部216を配置することにより、環状永久磁石220から生じる磁束を通す閉磁路に無駄がなく、漏れ磁束を少なくして永久磁石の磁力を効率的に使用することができる。
このため、可動プランジャ215のストークに影響する累積の部品数や形状公差を最小限とすることができる。しかも、可動プランジャ215のストローク調整を環状永久磁石220の厚み及び可動プランジャ215の周鍔部216の厚みのみで行うので、ストロークのバラツキを極小化することができる。
例えば、図10(a)及び(b)に示すように、外部接続端子114にC字状部115における上板部116を省略した形状となるL字状部160を連結するようにしてもよい。この場合でも、固定接触子111及び112に可動接触子130を接触させた閉極状態で、L字状部160の垂直板部を流れる電流によって生じる磁束を固定接触子111及び112と可動接触子130との接触部に作用させることができる。このため、固定接触子111及び112と可動接触子130との接触部における磁束密度を高めて電磁反発力に抗するローレンツ力を発生させることができる。
また、上記実施形態においては、可動プランジャ215に連結軸131を螺合させる場合について説明したが、螺合に限らず、任意の接続方法を適用することができ、さらには可動プランジャ215と連結軸131とを一体に形成するようにしてもよい。
また、上記実施形態においては、消弧容器102及びキャップ230で密封容器を構成し、この密封容器内にガスを封入する場合について説明したが、これに限定されるものではなく、遮断する電流が低い場合にはガス封入を省略するようにしてもよい。
また、上記実施形態においては、本発明を電磁接触器に適用した場合について説明したが、これに限定されるものではなく、電磁継電器、スイッチ等の消弧容器を有する開閉器に本発明を適用することができる。
Claims (5)
- 消弧容器に、所定間隔を保って配置された一対の固定接触子及び当該一対の固定接触子に対して接離可能に配設された可動接触子を内装した開閉器であって、
前記消弧容器は、前記一対の固定接触子を構成する一対の外部接続端子を接着保持する端子保持板部及び該端子保持板部の外周部から下方に延長する側板部を有し、前記端子保持板部とは反対側を開放面とする樹脂容器と、該樹脂容器の側板部内に挿通される前記一対の固定接触子及び前記可動接触子を内装し下端を開放した金属製の桶状体とを接着剤で接着して構成されていることを特徴とする開閉器。 - 前記端子保持板部は、前記一対の外部接続端子を挿通する一対の端子挿通孔と、該一対の端子挿通孔に連通して底面から突出形成され、前記桶状体の天面板部に形成された一対の端子挿通孔に嵌合される一対の環状突出部とを有することを特徴とする請求項1に記載の開閉器。
- 前記桶状体の内側面には前記一対の固定接触子及び前記可動接触子を囲んで消弧室を形成する絶縁筒体が配置されていることを特徴とする請求項1又は2に記載の開閉器。
- 前記樹脂容器の前記端子保持板部における一対の端子挿通孔は、外面側から内面側に向かって徐々に拡径するテーパー状に形成して、前記外部接続端子との間に楔状の接着剤注入部を形成することを特徴とする請求項2に記載の開閉器。
- 前記樹脂容器の前記側板部の内面は、前記端子保持板部から開放面に向かって徐々に対向長さが広くなるテーパー状に形成して、前記桶状体の側面との間に断面楔状の接着剤注入部を形成することを特徴とする請求項1乃至4の何れか1項に記載の開閉器。
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KR1020147016019A KR20140138591A (ko) | 2012-03-12 | 2013-03-04 | 개폐기 |
EP13761432.7A EP2827354A1 (en) | 2012-03-12 | 2013-03-04 | Switch |
US14/363,183 US20140360985A1 (en) | 2012-03-12 | 2013-03-04 | Switch |
CN201380004254.4A CN103999182A (zh) | 2012-03-12 | 2013-03-04 | 开关 |
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JP2012055157A JP5914065B2 (ja) | 2012-03-12 | 2012-03-12 | 開閉器 |
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PCT/JP2013/001320 WO2013136713A1 (ja) | 2012-03-12 | 2013-03-04 | 開閉器 |
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US (1) | US20140360985A1 (ja) |
EP (1) | EP2827354A1 (ja) |
JP (1) | JP5914065B2 (ja) |
KR (1) | KR20140138591A (ja) |
CN (1) | CN103999182A (ja) |
WO (1) | WO2013136713A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2600367A1 (de) * | 2011-11-29 | 2013-06-05 | Eaton Industries GmbH | Schaltgerät für Gleichstromanwendungen |
KR101545893B1 (ko) * | 2014-01-28 | 2015-08-20 | 엘에스산전 주식회사 | 릴레이 |
KR200486468Y1 (ko) * | 2014-09-29 | 2018-07-05 | 엘에스산전 주식회사 | 직류 릴레이 |
JP6425638B2 (ja) * | 2015-10-02 | 2018-11-21 | ショット日本株式会社 | 高容量リレー用パイプリード付き気密端子およびその気密端子を用いたリレー用接点装置 |
US11139133B2 (en) * | 2017-01-11 | 2021-10-05 | Panasonic Intellectual Property Management Co., Ltd. | Contact device, electromagnetic relay and electrical device |
CN106710969A (zh) * | 2017-02-09 | 2017-05-24 | 苏州安来强电子科技有限公司 | 带引弧角的密封型接触器 |
US10950402B2 (en) * | 2017-10-17 | 2021-03-16 | Solarbos, Inc. | Electrical contactor |
TWI669045B (zh) * | 2018-11-13 | 2019-08-11 | 和碩聯合科技股份有限公司 | 電子裝置 |
JP7259670B2 (ja) * | 2019-09-19 | 2023-04-18 | 富士電機機器制御株式会社 | 電磁接触器 |
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JP3107288B2 (ja) * | 1996-03-26 | 2000-11-06 | 松下電工株式会社 | 封止接点装置 |
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-
2012
- 2012-03-12 JP JP2012055157A patent/JP5914065B2/ja not_active Expired - Fee Related
-
2013
- 2013-03-04 CN CN201380004254.4A patent/CN103999182A/zh active Pending
- 2013-03-04 EP EP13761432.7A patent/EP2827354A1/en not_active Withdrawn
- 2013-03-04 US US14/363,183 patent/US20140360985A1/en not_active Abandoned
- 2013-03-04 WO PCT/JP2013/001320 patent/WO2013136713A1/ja active Application Filing
- 2013-03-04 KR KR1020147016019A patent/KR20140138591A/ko not_active Application Discontinuation
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JPH0291901A (ja) | 1988-09-29 | 1990-03-30 | Mitsubishi Electric Corp | 有極電磁石装置 |
JPH0945208A (ja) * | 1995-07-27 | 1997-02-14 | Matsushita Electric Works Ltd | 封止接点装置 |
US5959519A (en) | 1996-03-06 | 1999-09-28 | Siemens Ag | Electromagnetic switching device |
JPH09320437A (ja) * | 1996-05-31 | 1997-12-12 | Matsushita Electric Works Ltd | 封止接点装置 |
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WO2011115059A1 (ja) * | 2010-03-15 | 2011-09-22 | オムロン株式会社 | 接点開閉装置 |
Also Published As
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JP2013191326A (ja) | 2013-09-26 |
KR20140138591A (ko) | 2014-12-04 |
JP5914065B2 (ja) | 2016-05-11 |
CN103999182A (zh) | 2014-08-20 |
EP2827354A1 (en) | 2015-01-21 |
US20140360985A1 (en) | 2014-12-11 |
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