WO2011115056A1 - 接点開閉装置 - Google Patents
接点開閉装置 Download PDFInfo
- Publication number
- WO2011115056A1 WO2011115056A1 PCT/JP2011/055936 JP2011055936W WO2011115056A1 WO 2011115056 A1 WO2011115056 A1 WO 2011115056A1 JP 2011055936 W JP2011055936 W JP 2011055936W WO 2011115056 A1 WO2011115056 A1 WO 2011115056A1
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- WIPO (PCT)
- Prior art keywords
- contact
- movable
- iron core
- coil
- spring
- 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
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
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- 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
- H01H50/00—Details of electromagnetic relays
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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
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
- H01H50/041—Details concerning assembly of relays
- H01H50/045—Details particular to contactors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/18—Movable parts of magnetic circuits, e.g. armature
- H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
- H01H50/40—Branched or multiple-limb main magnetic circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/44—Magnetic coils or windings
- H01H50/443—Connections to coils
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/546—Contact arrangements for contactors having bridging contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/02—Non-polarised relays
- H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
- H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
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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
- H01H50/023—Details concerning sealing, e.g. sealing casing with resin
- H01H2050/025—Details concerning sealing, e.g. sealing casing with resin containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction
Definitions
- the present invention relates to a contact switching device, and more particularly to a contact switching device suitable for a power load relay or an electromagnetic switch.
- a contact switching device as shown in Patent Document 1, a solenoid coil wound around one axis and having a hollow part on one axis, a movable iron core provided in the hollow part movably along the one axis, A first yoke provided on one end face side of the solenoid coil facing one end side of one axis and having an insertion hole on the one axis, and a second yoke provided on the other end face side of the solenoid coil facing the other end side of the one axis
- An electromagnet device having A pair of fixed terminals each having a connecting portion with an external circuit on one end side of the one axis and a fixed contact on the other end side of the one axis, and a pair of movable contacts respectively contacting and separating from the fixed contact at both ends A movable contact, a holding portion for holding the movable contact, and a connecting shaft that extends from the holding portion to the other end of the one shaft and passes through the insertion hole of the first y
- the surrounding member is formed in a box shape having an opening on the other end side of the one shaft, and the bottom of the surrounding member
- Each fixed contact side of the pair of fixed terminals is inserted and held, and a substantially sealed space is formed by the surrounding member and at least the first yoke, and the movable contact and the fixed contact are stored in the substantially sealed space.
- an electromagnetic switchgear characterized by that.
- the present invention is to provide a contact switching device having a small height.
- the contact switching device attracts the movable iron core provided at one end of the movable shaft to the fixed iron core based on the excitation and demagnetization of the electromagnet portion.
- a contact opening / closing device that reciprocates in an axial direction and moves a movable contact of a movable contact piece disposed at the other end of the movable shaft to and from a fixed contact, wherein the movable shaft has two coil springs having different diameters. And one coil spring is arranged in the other coil spring.
- one of the two coil springs is disposed in the other coil spring and is not stacked up and down, a small contact switching device with a small height can be obtained.
- a coil spring having a small diameter of the two coil springs may be inserted through the movable shaft so as to be independently movable. According to this embodiment, since two coil springs can be manufactured separately, it is easy to manufacture a coil spring with high dimensional accuracy.
- two coil springs may be continuous with each other at one end. According to this embodiment, since it is assembled as one continuous coil spring, the number of parts and assembly man-hours are small, and a contact switching device with high productivity can be obtained.
- a coil spring having a small length dimension and a small diameter is inserted so as to be able to move independently of the movable shaft, and the length dimension is large. And it is good also as a structure arrange
- a desired contact contact force can be obtained and the height dimension can be reduced.
- a coil spring having a short length located on the inner side is difficult to tilt, and variations in operating characteristics are less likely to occur.
- the spring constant of the coil spring that is pressed later during operation may be larger than the spring constant of the coil spring that is pressed first.
- FIG. 1A, 1B and 1C are an overall perspective view, a plan view and a side view showing an embodiment of a contact switching apparatus according to the present invention. It is a disassembled perspective view of the contact switching apparatus shown in FIG. 3A, 3B, and 3C are a perspective view, a cross-sectional view, and a perspective view as seen from a different angle of the magnet holder shown in FIG. 4A and 4B are a side sectional view and a front sectional view before the operation of the contact switching apparatus shown in FIG. 5A and 5B are a side sectional view and a front sectional view after the operation of the contact switching apparatus shown in FIG.
- FIG. 6A, 6B and 6C are an overall perspective view, a plan view and a side view showing a second embodiment of the contact switching apparatus according to the present invention.
- FIG. 7 is an exploded perspective view of the contact switching device shown in FIG. 6 viewed from above. It is the disassembled perspective view which looked at the contact switching apparatus shown in FIG. 6 from the downward direction. It is the elements on larger scale of the exploded perspective view shown in FIG. It is the elements on larger scale of the exploded perspective view shown in FIG. It is the elements on larger scale of the exploded perspective view shown in FIG. It is the elements on larger scale of the exploded perspective view shown in FIG. It is the elements on larger scale of the exploded perspective view shown in FIG. It is the elements on larger scale of the exploded perspective view shown in FIG. 13A and 13B are perspective views of the magnet holder illustrated in FIGS. 7 and 8 as seen from different angles.
- 14A, 14B, and 14C are a plan view of the magnet holder illustrated in FIGS. 7 and 8, and a cross-sectional view taken along line BB and CC in FIG. 14A.
- 15A, 15B, and 15C are a perspective view, a front view, and a sectional view taken along the line CC of FIG. 15B of the position restricting plate shown in FIGS. 16A, 16B and 16C are a perspective view, a front view and a plan view of the cushioning material shown in FIGS. 17A, 17B, and 17C are a perspective view, a front view, and an enlarged sectional view taken along line CC of FIG. 17B of the plate-like first yoke shown in FIGS.
- FIGS. 19A, 19B, and 19C are a perspective view, a front view, and an enlarged sectional view taken along the line CC of FIG. 18B of the coil terminal shown in FIGS. 19A, 19B, and 19C are a perspective view, a front view, and an enlarged sectional view taken along the line CC of FIG. 19B of another coil terminal.
- 20A is a longitudinal sectional view of the spool
- FIGS. 20B and 20C are perspective views for explaining a method of assembling the coil terminal to the flange portion of the spool.
- FIG. 21A is a cross-sectional view for explaining a method of assembling the plate-shaped first yoke, the metal cylindrical flange, and the metal frame
- FIG. 21A is a cross-sectional view for explaining a method of assembling the plate-shaped first yoke, the metal cylindrical flange, and the metal frame
- 21B is an enlarged cross-sectional view of a main part after the assembly.
- 22A, 22B, and 22C are a perspective view, a cross-sectional view, and a perspective view as seen from a different angle of the lid shown in FIGS. 23A, 23B, and 23C are a perspective view, a cross-sectional view, and a perspective view as seen from a different angle, showing a modification of the above-described lid.
- 24A and 24B are a front sectional view and a side sectional view before operation of the contact switching apparatus according to the second embodiment shown in FIG. 25A and 25B are a front sectional view and a side sectional view after the operation of the contact switching apparatus according to the second embodiment shown in FIG.
- 26A and 26B are a perspective view and a plan view showing a cross section of the contact switching apparatus shown in FIG. It is the cross section looked up from the downward direction of the contact switching device shown in FIG. 28A and 28B are perspective views of the magnet holder of the contact switching apparatus according to the third embodiment of the present invention as seen from different angles.
- 29A, 29B, and 29C are a plan view of the magnet holder shown in FIG. 28, and sectional views taken along lines BB and CC in FIG. 29A.
- 30A and 30B are a side sectional view and a front sectional view before operation of the contact switching apparatus according to the third embodiment.
- 31A and 31B are a side sectional view and a front sectional view after the operation of the contact switching apparatus according to the third embodiment.
- 32A and 32B are perspective views of the movable contact piece of the contact switching apparatus according to the fourth embodiment of the present invention as seen from different angles.
- 33A and 33B are a side cross-sectional view and a front cross-sectional view before operation of the contact switching apparatus according to the fourth embodiment of the present invention.
- 34A and 34B are a side sectional view and a front sectional view after the operation of the contact switching apparatus according to the fourth embodiment of the present invention.
- 35A, 35B, and 35C are a perspective view of a magnet holder according to a fifth embodiment of the present invention, and a front sectional view and a side sectional view of FIG. 35A.
- 36A and 36B are partial enlarged sectional views of magnet holders according to sixth and seventh embodiments of the present invention.
- FIGS. 39B and 39C are graphs showing the measurement results of the suction force.
- the sealed electromagnetic relay according to the first embodiment includes a ceramic plate 31, a metal cylindrical flange 32, and a plate shape in a housing formed by assembling a cover 20 to the case 10.
- a contact mechanism portion 30 incorporated in a sealed space 43 including the first yoke 37 and the bottomed cylindrical body 41 and an electromagnet portion 50 that drives the contact mechanism portion 30 from outside the sealed space 43 are accommodated.
- the case 10 is a substantially box-shaped resin molded product.
- the case 10 is provided with a mounting hole 11 at a lower corner portion of the outer side surface, and a bulging portion 12 for drawing out a lead wire (not shown) is formed at a corner portion of the side surface.
- a locking hole 13 is provided at the opening edge of the opposite side surface.
- the cover 20 has a planar shape capable of covering the opening of the case 10, and is provided with terminal holes 22 and 22 on both sides of a partition wall 21 projecting from the center of the upper surface thereof. Further, the cover 20 is provided on one side surface thereof with a protruding portion 23 that can prevent so-called fluttering of a lead wire (not shown) by being inserted into the bulging portion 12 of the case 10. Further, the cover 20 is provided with a locking claw 24 that can be locked in the locking hole 13 of the case 10 at the opening edge of the opposite side surface.
- the contact mechanism 30 is disposed in the sealed space 43 formed by the ceramic plate 31, the metal cylindrical flange 32, the plate-shaped first yoke 37, and the bottomed cylindrical body 41, and the magnet holder 35, The fixed iron core 38, the movable iron core 42, the movable shaft 45, and the movable contact piece 48 are used.
- the ceramic plate 31 has a planar shape that can be brazed to an upper opening edge of a metal cylindrical flange 32 to be described later, and has a pair of terminal holes 31a and 31a and a gas vent hole 31b (see FIGS. 4A and 5A). It is provided.
- the ceramic plate 31 has a metal layer (not shown) formed on the outer peripheral edge of the upper surface, the opening edge of the terminal hole 31a, and the opening edge of the gas vent hole 31b. 4 and 5, a fixed contact terminal 33 having a fixed contact 33a fixed to the lower end thereof is brazed to the terminal hole 31a of the ceramic plate 31, and a gas vent pipe is connected to the gas vent hole 31b. 34 is brazed.
- the metal cylindrical flange 32 brazed to the outer peripheral edge of the upper surface of the ceramic plate 31 has a substantially cylindrical shape formed by pressing a metal plate as shown in FIG.
- the metal cylindrical flange 32 is integrally welded to the plate-shaped first yoke 37 described later at the outer peripheral edge portion on the lower side.
- the magnet holder 35 housed in the metal cylindrical flange 32 is made of a heat-resistant insulating material having a box shape, and a pocket that can hold the permanent magnets 36 on the opposite outer side surfaces thereof. Each part 35a is formed.
- the magnet holder 35 is provided with an annular cradle 35c one step lower at the center of the bottom surface, and a cylindrical insulating portion 35b projecting downward from the center of the annular cradle 35c.
- the cylindrical insulating portion 35b has a cylindrical fixed iron core 38 and a movable shaft even when an arc is generated and a high voltage is generated in the path of the metal cylindrical flange 32, the plate-shaped first yoke 37, and the fixed iron core 38. Insulating 45 prevents the welding and integration of both.
- the plate-shaped first yoke 37 has a planar shape that can be fitted to the opening edge of the case 10, and an annular stepped portion 37 a is formed on the upper surface thereof by extrusion processing.
- a caulking hole 37b is provided at the center thereof.
- the plate-like first yoke 37 has the upper end portion of the cylindrical fixed iron core 38 crimped and fixed to the caulking hole 37b, and the lower opening portion of the metal cylindrical flange 32 is provided to the annular step portion 37a. It is fitted and welded from the outside.
- the metal cylindrical flange 32 is fitted into the annular step portion 37a from above, so that both can be accurately and easily positioned. Further, the lower opening edge portion of the metal cylindrical flange 32 is welded and integrated with the annular step portion 37a of the plate-like first yoke 37 from the outside. For this reason, there is an advantage that a contact switching device having a small floor area can be obtained without requiring a large welding allowance on the side.
- a movable shaft 45 provided with an annular flange 45a is slidably inserted into the through hole 38a via the cylindrical insulating portion 35b of the magnet holder 35.
- the movable shaft 45 has a return spring 39 inserted therein, and a movable iron core 42 fixed to the lower end thereof by welding.
- the bottomed cylindrical body 41 that houses the movable iron core 42 is hermetically joined to the lower surface edge portion of the caulking hole 37b provided in the plate-shaped first yoke 37 at the opening edge portion. And after sucking internal air from the degassing pipe 34, the sealed space 43 is formed by filling and sealing the gas.
- the movable shaft 45 has a dish-shaped receiving member 46 locked to an annular flange 45 a provided at an intermediate portion thereof, and prevents the inserted contact spring 47 and movable contact piece 48 from falling off.
- a retaining ring 49 is fixed to the upper end of the ring.
- the movable contact 48a provided in the upper surface both ends of the said movable contact piece 48 is facing the fixed contact 33a of the contact terminal 33 arrange
- the electromagnet portion 50 press-fits and fixes coil terminals 53 and 54 to a flange 52 a of a spool 52 around which the coil 51 is wound, and the coil 51 via the coil terminals 53 and 54.
- the bottomed cylindrical body 41 is inserted into the through hole 52 b of the spool 52 and fitted into the fitting hole 56 a of the second yoke 56.
- the electromagnets are engaged by engaging the upper ends of both side portions 57, 57 of the second yoke 56 with both ends of the plate-like first yoke 37 and fixing them by means such as caulking, press-fitting or welding.
- the part 50 and the contact mechanism part 30 are integrated.
- the movable iron core 42 does not contact the bottom surface of the bottomed cylindrical body 41. For this reason, since the impact sound is absorbed and alleviated by the magnet holder 35, the fixed iron core 38, the electromagnet portion 50, etc., there is an advantage that a sealed electromagnetic relay with a small opening / closing sound can be obtained.
- the sealed electromagnetic relay includes a metal frame 160, a ceramic plate 131, and a metal cylinder in a housing formed by assembling a cover 120 to a case 110.
- a contact mechanism 130 incorporated in a sealed space 143 including a cylindrical flange 132, a plate-shaped first yoke 137, and a bottomed cylindrical body 141; an electromagnet 150 for driving the contact mechanism 130 from outside the sealed space 143; Is stored.
- the case 110 is a substantially box-shaped resin molded product.
- the case 110 is provided with mounting holes 111 at the lower corners of the outer side surface, and leads out lead wires (not shown) at the side corners.
- a bulging portion 112 is formed, and a locking hole 113 is provided at the opening edge of the opposite side surface.
- a cylindrical fitting 114 is insert-molded in the mounting hole 111.
- the cover 120 has a planar shape capable of covering the opening of the case 110, and has terminal holes 122, 122 on both sides of a partition wall 121 projecting from the center of the upper surface. is there. Further, the cover 120 is provided on one side surface thereof with a protruding portion 123 that can prevent so-called fluttering of a lead wire (not shown) by being inserted into the bulging portion 112 of the case 110. Further, the cover 120 is provided with a locking claw portion 124 that can be locked in the locking hole 113 of the case 110 at the opening edge of the opposite side surface.
- the contact mechanism 130 is disposed in the sealed space 143 formed by the metal frame 160, the ceramic plate 131, the metal cylindrical flange 132, the plate-shaped first yoke 137, and the bottomed cylindrical body 141 as described above. Has been.
- the contact mechanism unit 130 includes a magnet holder 135, a fixed iron core 138, a movable iron core 142, a movable shaft 145, a movable contact piece 148, and a lid body 161.
- the metal frame 160 has a planar shape that can be brazed to the outer peripheral edge of the upper surface of a ceramic plate 131 described later.
- the metal frame 160 has a ring portion 160a for supporting a gas vent pipe 134, which will be described later, on its inner edge, and is welded to an opening edge of a metal cylindrical flange 132, which will be described later, on its outer peripheral edge.
- An outer peripheral rib 160b is provided.
- the ceramic plate 131 has a planar shape in which the outer peripheral edge of the upper surface can be brazed to the opening edge of the metal frame 160, and a pair of terminal holes 131a and 131a and a gas vent A hole 131b is provided.
- the ceramic plate 131 has a metal layer (not shown) formed on the outer peripheral edge of the upper surface, the opening edge of the terminal hole 131a, and the opening edge of the gas vent hole 131b.
- a rectangular frame brazing material 172 having a ring portion 172a corresponding to the opening edge of the gas vent hole 131b is disposed on the outer peripheral edge of the upper surface of the ceramic plate 131 and the opening edge of the gas vent hole 131b. Further, the ring portion 172a of the metal frame 160 is superimposed on the ring portion 172a of the rectangular frame-shaped brazing material 172 and positioned. Further, a gas vent pipe 134 is inserted into the ring portion 160 a of the metal frame 160 and the gas vent hole 131 b of the ceramic plate 131.
- the fixed contact terminal 133 into which the ring-shaped brazing material 170, the terminal ring 133b, and the ring-shaped brazing material 171 are inserted in sequence is inserted into the terminal hole 131a of the ceramic plate 131.
- the brazing materials 170, 171, and 172 are heated, melted, and brazed.
- the fixed contact terminal 133 inserted into the terminal hole 131a of the ceramic plate 131 via the terminal ring 133b has a fixed contact 133a fixed to the lower end thereof.
- the terminal ring 133b is for absorbing and adjusting the difference in thermal expansion coefficient between the ceramic plate 131 and the fixed contact terminal 133.
- the gas vent pipe 134 inserted into the terminal hole 131 a of the ceramic plate 131 is brazed via the ring portion 160 a of the metal frame 160 and the ring 172 a of the rectangular frame brazing material 172. Yes.
- the sealing performance is improved, and a contact switching device having a sealing structure excellent in mechanical strength, in particular, impact resistance can be obtained.
- the metal cylindrical flange 132 has a substantially cylindrical shape formed by pressing a metal plate as shown in FIGS. As shown in FIG. 21A, the metal cylindrical flange portion is formed by welding and integrating an outer peripheral rib 132a provided in an upper opening thereof with an outer peripheral rib 160b of the metal frame 160, and below that. The opening edge on the side is integrally welded to a plate-like first yoke 137 described later.
- the metal frame body 160 and the metal cylindrical flange 132 are integrally formed in advance by press working, and the outer peripheral rib provided in the lower opening of the metal cylindrical flange portion 132 is a plate.
- the upper surface of the first yoke 137 may be welded and integrated. According to this configuration, not only the outer peripheral rib 160b of the metal frame 160 and the outer peripheral rib 132a of the metal cylindrical flange 132 described above can be omitted, but also the welding process thereof can be omitted. Further, since the metal cylindrical flange 132 and the plate-shaped first yoke 137 can be welded from above and below, the welding process can be simplified and a highly productive contact switching device can be obtained compared to the method of welding from the outside. It is done.
- the plate-like first yoke 137 has a planar shape that can be fitted to the opening edge of the case 110. As shown in FIG. 17, the plate-like first yoke 137 has positioning projections 137a protruding at a predetermined pitch on the upper surface thereof, and a fitting hole 137b is provided at the center thereof.
- the plate-like first yoke 137 is provided with an inner V-shaped groove 137c in an annular shape so as to connect the positioning protrusion 137a, and the inner V-shaped groove 137c is surrounded by an outer V-shaped groove 137d. is there. Then, as shown in FIG.
- the rectangular frame-shaped brazing material 173 is positioned on the positioning protrusion 137a, and the opening edge on the lower side of the metal cylindrical flange 132 is positioned. Then, the rectangular frame brazing material 173 is melted, and the lower opening edge of the metal cylindrical flange 132 is brazed to the plate-shaped first yoke 137 (FIG. 21B). Furthermore, the upper end of the cylindrical fixed iron core 138 is brazed with a brazing material 174 to the fitting hole 137 b of the plate-shaped first yoke 137.
- the metal cylindrical flange 132 is assembled and brought into contact with the positioning protrusion 137a from above, thereby enabling accurate and easy positioning. Further, when the opening edge of the lower side of the metal cylindrical flange 132 is integrated with the upper surface of the plate-shaped first yoke 137 by brazing, the molten brazing material will be inward even if the molten brazing material flows out. It accumulates in the V-shaped groove 137c and the outer V-shaped groove 137d. Therefore, the molten brazing material does not flow deep inside the metal cylindrical flange 132 and does not flow out of the plate-shaped first yoke 137. As a result, no skill is required for the brazing operation, and the operation is simplified, so that there is an advantage that productivity is improved.
- the magnet holder 135 has a box shape that can be stored in the metal cylindrical flange 132, and is formed of a heat-resistant insulating material. Further, as shown in FIGS. 13 and 14, the magnet holder 135 is formed with pocket portions 135a capable of holding the permanent magnets 136 on the opposite outer side surfaces thereof. Further, the magnet holder 135 is provided with an annular cradle 135c one step lower in the center of the bottom surface, and a cylindrical insulating part 135b having a through hole 135f projecting downward from the center of the cradle 135c.
- the magnet holder 135 is provided with a recess 135d for press-fitting a later-described position restricting plate 162 on the opposing inner surface. Further, the magnet holder 135 is provided with a pair of recesses 135e into which a buffer material 163 described later can be fitted on the back side of the bottom surface.
- the position restricting plate 162 is made of an elastic metal plate having a substantially rectangular front surface, and both side edges thereof are cut and raised to form an elastic claw portion 162a. And it press-fits into the recessed part 135d of the said magnet holder 135, and the idle rotation of the movable contact piece 148 mentioned later is controlled.
- the cushioning material 163 is made of an elastic material having a plane shape of approximately eight, and is press-fitted into the recess 135 e of the magnet holder 135 so as to form a plate shape with the magnet holder 135. It is clamped by the first yoke 137 (FIGS. 24A and 25A).
- the cushioning material 163 is formed in the shape of an approximately plane 8 is to ensure a desired floor elasticity while ensuring a wide floor area and a stable supporting force.
- the buffer material 163 is not limited to the above-described planar shape, and may be, for example, a planar lattice shape or a planar O-shape.
- the buffer material is not limited to the block shape described above, and may be a sheet shape. Alternatively, a block-shaped cushioning material and a sheet-shaped cushioning material may be stacked, and these may be sandwiched between the bottom back side of the magnet holder 135 and the plate-shaped first yoke 137.
- the buffer material is not limited to a rubber material and a resin material, and may be a metal material such as a copper alloy, SUS, or aluminum.
- the cylindrical fixed iron core 138 slides on a movable shaft 145 having an annular flange 145a through a cylindrical insulating portion 135b of the magnet holder 135 in the through hole 138a. Inserted as possible.
- the movable shaft 145 has a return spring 139 inserted therein, and a movable iron core 142 is fixed to the lower end thereof by welding.
- the movable iron core 142 has an annular suction portion 142b at the upper opening edge of the cylindrical outer peripheral portion 142a, and the cylindrical inner peripheral portion 142c from the opening edge of the annular suction portion 142b. Projecting inward.
- the cylindrical inner peripheral portion 142c is integrated by being inserted into the lower end portion of the movable shaft 145.
- the weight of the movable iron core 142 is countersunk to reduce the weight, thereby reducing the operation sound without reducing the suction force.
- the movable iron core 142 is reduced in weight, there is an advantage that even if an impact load is applied from the outside, the inertial force of the movable iron core 142 is small and malfunction is difficult.
- the bottomed cylindrical body 141 that houses the movable iron core 142 is hermetically joined to the lower surface edge portion of the caulking hole 137b provided in the plate-shaped first yoke 137 at the opening edge portion. And after sucking internal air from the degassing pipe 134, the sealed space 143 is formed by filling and sealing the gas.
- the movable shaft 145 is provided with an annular flange 145a at an intermediate portion thereof.
- the movable contact piece 148 has movable contacts 148 a provided at both ends of the upper surface thereof, which can contact and separate from the fixed contact 133 a of the contact terminal 133 disposed in the metal cylindrical flange 132. Opposite to.
- the movable contact piece 148 has a shaft hole 148b through which the movable shaft 145 can be inserted in the center of the plane, and four position restricting protrusions 148c on the outer peripheral surface thereof.
- the dish-shaped holder 146 is inserted through the movable shaft 145, and then the small contact spring 147a, the large contact spring 147b, and the movable contact piece 148 are inserted. Further, by fixing a retaining ring 149 to the upper end of the movable shaft 145, the movable contact piece 148 and the like are retained.
- the lid 161 has a substantially planar H shape that can be fitted into the opening of the magnet holder 135. Further, as shown in FIG. 22, the lid 161 is provided with a position regulating tongue 161a projecting from both side edges of the lower surface. The lid 161 regulates the lifting of the position regulating plate 162 incorporated in the magnet holder 135 by the position regulating tongue 161a. Further, the four extending portions 161 b extending laterally from the corners of the lid body 161 close the opening of the magnet holder 135 having a complicated shape.
- the extended portion 161b is configured such that, for example, the metal frame 160 and the fixed contact 133a are formed by the scattered matter generated by the arc generated when the contact is opened and closed flows out from the opening of the magnet holder 135 and accumulates. Prevent short circuit.
- a plurality of capture grooves 161c are arranged in parallel so as to be bridged between the position regulating tongue pieces 161a and 161a on the back surface of the lid 161. The capture groove 161c efficiently accumulates the scattered matter generated by the arc, thereby preventing a short circuit between the fixed contacts 133a and 133a and improving the insulation.
- the scattered object does not flow out from the interface between the opening edge of the magnet holder 135 and the lower surface of the ceramic plate 131, and the metal cylindrical flange 132 and the fixed contact 133a are not short-circuited. There is an advantage that it can be secured.
- the lid 161 is not limited to the shape described above, and may be, for example, a planar square shape that can be fitted into the opening of the magnet holder 135 as shown in FIG.
- the lid 161 has position restricting tongues 161a and 161a projecting from opposite side edges of the back surface thereof, and efficiently stores scattered matter between the position restricting tongues 161a and 161a. Therefore, a plurality of capture grooves 161c are arranged in parallel. Further, a pair of contact holes 161d are provided with the capture groove 161c interposed therebetween, and a plurality of capture grooves 161e are provided in parallel on both sides of the contact hole 161d.
- the electromagnet portion 150 has coil terminals 153 and 154 press-fitted and fixed to a flange portion 152a of a spool 152 around which a coil 151 is wound. Then, the coil 151 and a lead wire (not shown) are connected via the coil terminals 153 and 154.
- the spool 152 is provided with a press-fit slit 152c at the corner of the flange 152a, and the guide groove 152d and the guide groove 152d are connected to the press-fit slit 152c.
- a locking hole 152e is provided.
- the coil terminals 153 and 154 have mirror-symmetric shapes, so that only the coil terminal 153 will be described for convenience of explanation.
- the coil terminal 153 has a coil binding portion 153a extending in a direction opposite to the press-fitting direction of the press-fitting portion 153h, and is connected to a lead wire in a direction perpendicular to the press-fitting direction of the press-fitting portion 153h.
- the part 153b is extended. For this reason, the coil binding part 153a and the lead wire connection part 153b are orthogonal to each other.
- the coil terminal 153 is formed by protruding a guide projection 153c in the press-fitting portion 153h and cutting up a locking claw 153d.
- the coil binding portion 153a is formed with a cutter surface 15g utilizing warpage generated at the time of pressing at the free end portion.
- the lead wire connecting portion 153b is provided with a lead wire insertion hole 153e and a binding notch portion 153f adjacent to each other at its free end.
- the guide protrusions 153c and 154c of the coil terminals 153 and 154 are engaged and temporarily fixed to the guide groove 152d of the spool 152 shown in FIG. 20A. Then, the press-fitting portions 153h and 154h of the coil terminals 153 and 154 are press-fitted into the press-fitting slit 152c, and the locking claws 153d and 154d are locked into the locking holes 152e and 152e, respectively, so as to be prevented from coming off.
- the coil 151 is wound around the spool 152, and then the lead wire of the coil 151 is wound around the coil binding portions 153a and 154a of the coil terminals 153 and 154, which are cut at the cutter surfaces 153g and 154g and soldered.
- the coil 151 and a lead wire are connected to each other by tangling with the notches 153f and 154f. Connected.
- the bottomed cylindrical body 141 is inserted into the through hole 152 b of the spool 152 and fitted into the flange 158 inserted and fixed in the fitting hole 156 a of the second yoke 156.
- the upper end corners of both side portions 157 and 157 of the second yoke 156 are respectively engaged with the corners of the plate-like first yoke 137 and fixed by means such as caulking, press-fitting or welding.
- the electromagnet unit 150 and the contact mechanism unit 130 are integrated.
- the plate-shaped first yoke 137 and the magnet holder 135 sandwich the substantially 8-shaped cushioning material 163 fitted in the recess 135e of the magnet holder 135 (FIGS. 24A and 25A).
- the coil binding portion 153a and the lead wire connecting portion 153b are separately provided on the coil terminal 153, the coil 151 does not get in the way during the lead wire connecting work, and the workability is improved. improves. Further, by using the through hole 153e and the notch 153f provided in the lead wire connecting portion 153b, the connection becomes easy and the lead wire is not easily dropped. Further, when the coil binding portion 153a and the lead wire connecting portion 153b are bent at a right angle, both of them stand up at the corner portions adjacent to the flange portion 152a. For this reason, there is an advantage that the insulation distance from the wound coil 151 to the lead wire becomes long, and the electromagnet part 150 having high insulation can be obtained. Needless to say, the coil terminal 154 having a mirror-symmetrical shape with the coil terminal 153 has the same advantage.
- the impact force of the movable shaft 145 is absorbed and relaxed by the buffer material 163 via the magnet holder 135.
- the movable iron core 142 does not contact the bottom surface of the bottomed cylindrical body 141.
- the impact sound of the movable shaft 45 is absorbed and relaxed by the magnet holder 135, the buffer material 163, the fixed iron core 138, the electromagnet portion 150, etc., and there is an advantage that a sealed electromagnetic relay with a small opening / closing sound can be obtained.
- the movable contact piece 148 moves up and down as the movable shaft 145 moves up and down as shown in FIG. At this time, even if the movable contact piece 148 is shaken, the position restricting projection 148c of the movable contact piece 148 is brought into contact with the position restricting plate 162 press-fitted into the concave portion 135d of the magnet holder 135 to be position restricted. . For this reason, the movable contact piece 148 is not in direct contact with the resin magnet holder 135, and no resin powder is generated, so that contact failure does not occur.
- the position restricting plate 162 is made of the same metal material as that of the movable contact piece 148, so that abrasion powder is less likely to be generated.
- the spring load can be adjusted in two stages as shown in FIG. 37A, so that the spring load can be adjusted along the attractive force of the electromagnet unit 150. For this reason, a large contact contact force and a large contact follow can be ensured, and a contact switching device with good operating characteristics can be obtained.
- the small contact spring 147a is disposed in the large contact spring 147b. Therefore, during operation, the large contact spring 147b having a large length and a small spring constant is first pressed (between P1 and P2 in the contact follow in FIG. 37A). Thereafter, the small contact spring 147a having a small length dimension and a large spring constant is pressed (left side of P2 in the contact follow in FIG. 37A). As a result, the spring load can be easily applied to the attractive force of the electromagnet portion that rapidly increases at the end of the operation, and a desired contact contact force can be obtained, and a contact switch with a small height can be obtained.
- both the large contact spring 147b and the small contact spring 147a are coil springs, they do not spread in the radial direction and the size in the radial direction can be reduced. Furthermore, since the small contact spring 147a is inserted through the movable shaft 145, there is an advantage that an electromagnetic relay that is less likely to be rattled and that does not vary in operating characteristics can be obtained.
- the length of the small contact spring 147a may be larger than that of the large contact spring 147b and the spring constant may be smaller than that of the large contact spring 147b so that the small contact spring 147a is pressed first.
- the small contact spring 147a and the large contact spring 147b may be connected to each other at one end to be continuous with each other. Even in these cases, it is possible to obtain a desired contact force.
- the third embodiment according to the present invention is a case where an annular partition wall 135g is provided so as to surround a through hole 135f provided at the center of the bottom surface of the magnet holder 135, as shown in FIGS.
- the opening edge of the annular partition wall 135 g approaches the vicinity of the lower surface of the movable contact piece 148. For this reason, the scattered matter generated by the arc or the like is less likely to enter the through hole 135f of the magnet holder 135, and there is an advantage that malfunction is unlikely to occur.
- Others are the same as those in the above-described embodiment, and thus the same parts are denoted by the same reference numerals and description thereof is omitted.
- annular partition wall 148d protrudes from the center of the lower surface of the movable contact piece 148. For this reason, by fitting the annular partition wall 148d of the movable contact piece 148 from the outside to the annular partition wall 135g provided in the magnet holder 135, the creepage distance between them can be increased. According to the present embodiment, the creepage distance from the outer peripheral edge of the movable contact piece 148 to the through hole 135f of the magnet holder 135 is further increased, and it is difficult for dust or the like to enter the through hole 135f, thereby improving durability. There is an advantage of doing.
- annular partition wall 135g is provided in the center of the bottom surface of the magnet holder 135
- the present invention is not necessarily limited thereto.
- a pair of partition walls are extended in parallel so as to be bridged over the opposing inner surfaces of the magnet holder 135, and finally the planar rectangular frame-shaped partition wall 135g is formed.
- the through hole 135f may be partitioned with
- the upper edge of the annular partition wall 135g protruding from the center of the bottom surface of the magnet holder 135 is fitted into the annular groove 148e provided on the lower surface of the movable contact piece 148. Intrusion of dust may be prevented.
- the annular flange 135h may extend outward from the upper edge of the annular partition wall 135g provided in the magnet holder 135. Then, the lower surface of the movable contact piece 148 and the annular flange 135h may be opposed to each other to form a gap, thereby preventing intrusion of scattered objects.
- Example 1 In the contact switching device of the second embodiment, a case where only the 8-shaped cushioning material 163 made of CR rubber is incorporated is a sample of Example 1, and a case where the cushioning material 163 is not incorporated is a sample of Comparative Example 1. Both return sounds were measured. As a result of the measurement, it was confirmed that the return sound had a decrease of 5.6 dB in the example and the comparative example. (Example 2)
- the case where only the sheet-like cushioning material is incorporated is the sample of Example 2, and the case where the sheet-like cushioning material is not incorporated is the sample of Comparative Example 2, and the return sound of both is measured. did.
- the copper sheet-like cushioning material having a thickness of 0.3 mm according to Example 2 is 11.6 dB, and the sheet-like cushioning material made of SUS having a thickness of 0.3 mm is used. It was found that in the sheet-like cushioning material made of aluminum having 10.6 dB and a thickness of 0.3 mm, a reduction in return sound of 8.6 dB can be confirmed, and the noise can be reduced. (Example 3)
- a case where a substantially 8-shaped cushioning material made of CR rubber and a sheet-like cushioning material are combined is a sample of Example 3, and a case where no cushioning material is assembled is Comparative Example 3.
- the return sound of both was measured.
- the combination of the 8-shaped cushioning material according to Example 3 and the copper sheet-shaped cushioning material having a thickness of 0.3 mm is 15.9 dB, the 8-shaped cushioning material and the thickness compared to the return sound of the comparative example.
- the relationship between weight reduction and noise reduction was measured by applying counterbore processing to the movable iron core 142. That is, as shown in FIGS. 38A, 38B, and 38C, the movable iron core 142 was subjected to counterbore processing to reduce the weight, and the operating sound was measured. As a result of the measurement, as shown in FIGS. 38D and 38E, it was confirmed that as the counterbore becomes deeper, the movable iron core becomes lighter and the operation sound is reduced. (Example 5)
- the operation sound can be reduced as the movable iron core is lighter.
- it is more effective to reduce the thickness of the suction part by counterbore processing while avoiding a decrease in suction force than to reduce the thickness of the outer peripheral part of the movable iron core for weight reduction.
- the noise can be reduced.
- the inner peripheral part 142c of the movable iron core 142 is for supporting the lower end part of the movable shaft 145 reliably, and is not necessarily required, and may be a minimum necessary size.
- the contact switching device according to the present invention is not limited to the above-described electromagnetic relay but may be applied to other contact switching devices.
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Abstract
Description
それぞれが外部回路との接続部を前記一軸の一端側に有するとともに固定接点を前記一軸の他端側に有する一対の固定端子と、前記固定接点に対してそれぞれ接離する一対の可動接点を両端に有する可動接触子と、前記可動接触子を保持する保持部、及びこの保持部から前記一軸の他端側に伸びて前記第1ヨークの挿通孔を通り前記可動鉄心に固定される連結軸を有するシャフトと、前記可動接点及び前記固定接点を収納する囲み部材と、を備え、前記電磁石装置により前記可動鉄心を前記一軸に沿って進退動させることにより、前記シャフトを介して前記一対の可動接点を前記一対の固定接点に対してそれぞれ接離する電磁開閉装置において、前記囲み部材は、前記一軸の他端側に開口を持つ箱状に形成され、当該囲み部材の底部から前記一対の固定端子の各固定接点側を挿通してこれを保持し、当該囲み部材と少なくとも前記第1ヨークとにより略密閉空間を形成し、当該略密閉空間に前記可動接点及び前記固定接点を収納していることを特徴とする電磁開閉装置がある。
本発明は、前記問題点に鑑み、高さ寸法の小さい接点開閉装置を提供することにある。
本実施形態によれば、2本のコイルバネを別々の製造できるので、寸法精度の高いコイルバネの製造が容易になる。
本実施形態によれば、連続する1つのコイルバネとして組み付けられるので、部品点数,組立工数が少なく、生産性の高い接点開閉装置が得られる。
第1実施形態に係る密封型電磁継電器は、図1ないし図5に図示するように、ケース10にカバー20を組み付けて形成したハウジング内に、セラミックプレート31、金属製筒状フランジ32、板状第1ヨーク37および有底筒体41からなる密封空間43内に組み込まれた接点機構部30と、この接点機構部30を密封空間43外から駆動する電磁石部50と、を収納してある。
また、金属製筒状フランジ32の下方開口縁部を板状第1ヨーク37の環状段部37aに外側方から溶接一体化する。このため、側方に広い溶接代を必要とせず、床面積の小さい接点開閉装置を得られるという利点がある。
まず、図4に示すように、コイル51に電圧が印加されていない場合には、復帰バネ39のバネ力で可動鉄芯42が下方側に付勢され、可動軸45が下方側に押し下げられ、可動接触片48が下方側に引き下げられている。このとき、可動軸45の環状鍔部45aが磁石ホルダー35の環状受け部35cに係合し、可動接点48aが固定接点33aから開離しているが、可動鉄芯42は有底筒体41の底面に当接していない。
なお、前記セラミックプレート131の端子孔131aに、端子用リング133bを介し、挿入される固定接点端子133は、その下端部に固定接点133aを固着してある。
また、本実施形態では、セラミックプレート131の端子孔131aに挿入されるガス抜きパイプ134は、金属製枠体160のリング部160aおよび方形枠状ロウ材172のリング172aを介してロウ付けされている。このため、シール性が高くなり、機械的強度、特に、耐衝撃性に優れた密封構造を有する接点開閉装置が得られる。
また、前記板状第1ヨーク137は、前記位置決め突起137aを接続するように内側V字溝137cを環状に設けてあるとともに、前記内側V字溝137cの周囲を外側V字溝137dで囲んである。そして、図21Aに示すように、前記位置決め突起137aに、方形枠状ロウ材173を位置決めするとともに、金属製筒状フランジ132の下方側の開口縁部を位置決めする。そして、前記方形枠状ロウ材173を溶融し、前記金属製筒状フランジ132の下方開口縁部を前記板状第1ヨーク137にロウ付けする(図21B)。
さらに、前記板状第1ヨーク137は、その嵌合孔137bに筒状固定鉄芯138の上端部をロウ材174でロウ付けする。
また、金属製筒状フランジ132の下方側の開口縁部を板状第1ヨーク137の上面にロウ付けで一体化する際に、溶融したロウ材が流出しても、溶融したロウ材は内側V字溝137cおよび外側V字溝137dに溜まる。このため、溶融したロウ材が金属製筒状フランジ132の内部深くに流入することはなく、板状第1ヨーク137の外部に流出することもない。この結果、ロウ付け作業に熟練を必要とせず、作業が簡単になるので、生産性が向上するという利点がある。
また、本実施形態によれば、材料の選択だけでなく、平面形状の変更で弾性力を調整でき、静音設計が容易になる。
さらに、前記緩衝材163は、前述の平面形状に限らず、例えば、平面格子状、平面O字形状であってもよい。
本実施形態によれば、前記可動鉄芯142の内部に座ぐり加工を施して軽量化することにより、吸引力を低下させずに、動作音の低減化を図っている。
また、可動鉄芯142を軽量化してあるので、外部から衝撃荷重が負荷されても、可動鉄芯142の慣性力が小さく、誤動作しにくいという利点がある。
本実施形態では、図20に図示するように、前記スプール152は、その鍔部152aの角部に圧入用スリット152cを設けてあるとともに、前記圧入用スリット152cに連通するようにガイド溝152dおよび係止孔152eを設けてある。
前記コイル端子153は、図18に示すように、圧入部153hの圧入方向と反対方向にコイル絡げ部153aを延在する一方、前記圧入部153hの圧入方向に対して直角方向にリード線接続部153bを延在してある。このため、コイル絡げ部153aとリード線接続部153bとは相互に直交している。
また、前記コイル端子153は、前記圧入部153hに、ガイド用突起153cを突き出し加工で形成するとともに、係止爪153dを切り起こしてある。
さらに、前記コイル絡げ部153aは、その自由端部にプレス加工の際に生じるに反りを利用したカッター面15gを形成してある。
そして、前記リード線接続部153bは、その自由端部にリード線挿入用孔153eと絡げ用切り欠き部153fを隣接するように設けてある。
また、リード線接続部153bに設けた貫通孔153eおよび切り欠き部153fを使用することにより、接続が容易になり、リード線が脱落しにくい。
さらに、コイル絡げ部153aとリード線接続部153bとを直角に曲げ起こすと、両者は鍔部152aの隣り合う角部でそれぞれ起立する。このため、巻回したコイル151からリード線までの絶縁距離が長くなり、絶縁性の高い電磁石部150を得られるという利点がある。
なお、コイル端子153と鏡面対称の形状を有するコイル端子154も同様な利点を有することは勿論である。
まず、図24に図示するように、コイル151に電圧が印加されていない場合には、復帰バネ139のバネ力で可動鉄芯142が下方側に付勢され、可動軸145が下方側に押し下げられ、可動接触片148が下方側に引き下げられている。このとき、可動軸145の環状鍔部145aが磁石ホルダー135の受け台135cに係合し、可動接点148aが固定接点133aから開離しているが、可動鉄芯142は有底筒体141の底面に当接していない。
本実施形態では、小接点バネ147a,大接点バネ147bを併用しているので、電磁石部150の吸引力にバネ負荷を沿わせやすく、バネ力の調整が容易になるという利点がある。
また、大接点バネ147b、小接点バネ147aとして、いずれもコイルバネを用いているため、径方向に広がることもなく、径方向の寸法も小さくできる。
さらに、小接点バネ147aが可動軸145に挿通されているので、ガタツキが生じにくく、動作特性にバラツキのない電磁継電器が得られるという利点がある。
本実施形態によれば、図30に示すように、前記環状仕切り壁135gの開口縁部が可動接触片148の下面近傍まで接近する。このため、アーク等によって生じた飛散物が磁石ホルダー135の貫通孔135fに侵入しにくくなり、動作不良が生じにくいという利点がある。
他は前述の実施形態と同様であるので、同一部分には同一番号を附して説明を省略する。
本実施形態によれば、可動接触片148の外周縁部から磁石ホルダー135の貫通孔135fまでの沿面距離がより一層長くなり、貫通孔135fに塵埃等が侵入しにくくなるので、耐久性が向上するという利点がある。
第2実施形態の接点開閉装置において、CRゴムからなる8の字形緩衝材163だけを組み込んだ場合を実施例1のサンプルとし、前記緩衝材163を組み込まなかった場合を比較例1のサンプルとし、両者の復帰音を測定した。
測定の結果、実施例と比較例とでは、復帰音において5.6dBの低下を確認できた。
(実施例2)
測定の結果、比較例2の復帰音に比し、実施例2に係る厚さ0.3mmの銅製のシート状緩衝材では11.6dB、厚さ0.3mmのSUS製のシート状緩衝材では10.6dB、厚さ0.3mmのアルミニウム製のシート状緩衝材では8.6dBの復帰音の低下を確認でき、静音化できることが判った。
(実施例3)
測定の結果、比較例の復帰音に比し、実施例3に係る8の字形緩衝材および厚さ0.3mmの銅製のシート状緩衝材の組み合わせでは15.9dB、8の字形緩衝材および厚さ0.3mmのSUS製のシート状緩衝材では18dB、8の字形緩衝材および厚さ0.3mmのアルミニウム製のシート状緩衝材では20.1dBの復帰音の低下を確認でき、より一層、静音化できることが判った。
(実施例4)
すなわち、図38A,38B,38Cに示すように、可動鉄芯142に座ぐり加工を施して軽量化し、その動作音を測定した。
測定の結果、図38D,38Eに示すように、座ぐりが深くなるにしたがって可動鉄芯が軽量化し、動作音が低減化することを確認できた。
(実施例5)
また、前述の可動鉄芯よりも大径の外径φ1'(=φ1×1.75)を有する可動鉄芯についても同様に吸引力特性を測定した。図39Cに示すように、外径と内径との比が74%以下であれば、吸引力特性に影響を与えないことが判った。
以上の測定結果から、外径と内径との比が77%以下、好ましくは74%以下であれば、可動鉄芯に対する吸引力特性に影響がないことが判った。
(実施例6)
図39Dに示すように、可動鉄芯142の吸着部142bの高さ寸法が、その外周部142aの高さ寸法t3の1/5以上であれば、吸引力に影響がないことを確認できた。
なお、可動鉄芯142の内周部142cは可動軸145の下端部を確実に支持するためのものであり、必ずしも必要でなく、必要最小限度の大きさであればよい。
20:カバー
21:仕切り壁
22:端子孔
30:接点機構部
31:セラミックプレート
31a:端子孔
32:金属製筒状フランジ
33:固定接点端子
33a:固定接点
35:磁石ホルダー
35a:ポケット部
35b:筒状絶縁部
35c:受け台
36:永久磁石
37:板状第1ヨーク
37a:環状段部
37b:カシメ孔
38:筒状固定鉄芯
38a:貫通孔
39:復帰バネ
41:有底筒体
42:可動鉄芯
43:密封空間
45a:環状鍔部
46:皿状受け具
50:電磁石部
51:コイル
52:スプール
56:第2ヨーク
120:カバー
121:仕切り壁
122:端子孔
130:接点機構部
131:セラミックプレート
131a:端子孔
132:金属製筒状フランジ
133:固定接点端子
133a:固定接点
134:ガス抜きパイプ
135:磁石ホルダー
135a:ポケット部
135b:筒状絶縁部
135c:受け台
135d:凹部
135f:貫通孔
135g:環状仕切り壁
135h:環状鍔部
136:永久磁石
137:板状第1ヨーク
137a:位置決め突起
137b:嵌合孔
137c:内側V字溝
137d:外側V字溝
138:筒状固定鉄芯
138a:貫通孔
139:復帰バネ
141:有底筒体
142:可動鉄芯
142a:筒状外周部
142b:環状吸着部
142c:筒状内周部
143:密封空間
145a:環状鍔部
146:皿状受け具
148:可動接触片
148a:可動接点
148c:位置規制用突起
148d:環状仕切り部
148e:環状溝
150:電磁石部
151:コイル
152:スプール
152a:鍔部
152b:貫通孔
152c:圧入用スリット
152d:ガイド溝
152e:係止孔
153,154:コイル端子
153a,154a:コイル絡げ部
153b,154b:リード線接続部
153d,154d:係止爪
153e,154e:貫通孔
153f,154f:切り欠き部
156:第2ヨーク
158:フランジ
160:金属製枠体
160a:リング部
160b:外周リブ
161:蓋体
161a:位置規制用舌片
161b:延在部
161c,161e:捕獲溝
162:位置規制板
162a:弾性爪部
162b:テーパ面
Claims (5)
- 電磁石部の励磁,消磁に基づき、可動軸の一端部に設けた可動鉄芯を固定鉄芯に吸引することにより、前記可動軸を軸心方向に往復移動させ、前記可動軸の他端部に配置した可動接触片の可動接点を固定接点に接離する接点開閉装置であって、
前記可動軸に、直径の異なる2本のコイルバネを挿通し、一方のコイルバネを他方のコイルバネ内に配置したことを特徴とする接点開閉装置。 - 2本のコイルバネのうち、直径が小さいコイルバネを可動軸に独立して移動できるように挿通したことを特徴とする請求項1に記載の接点開閉装置。
- 2本のコイルバネが、一端部で相互に連続していることを特徴とする請求項1に記載の接点開閉装置。
- 2本のコイルバネのうち、長さ寸法が小さく、かつ、直径の小さいコイルバネを、可動軸に独立して移動できるように挿通するとともに、長さ寸法が大きく、かつ、直径の大きいコイルバネの内側に、配置したことを特徴とする請求項1ないし3のいずれか1項に記載の接点開閉装置。
- 動作時に後から押圧されるコイルバネのバネ定数を、先に押圧されるコイルバネのバネ定数よりも大きくしたことを特徴とする請求項1ないし4のいずれか1項に記載の接点開閉装置。
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JP2012505670A JP5482891B2 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
US13/583,212 US8975989B2 (en) | 2010-03-15 | 2011-03-14 | Contact switching device |
EP11756241.3A EP2549510B1 (en) | 2010-03-15 | 2011-03-14 | Contact switching device |
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PCT/JP2011/055929 WO2011115050A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055936 WO2011115056A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055937 WO2011115057A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055931 WO2011115052A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055939 WO2011115059A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055934 WO2011115055A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
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PCT/JP2011/055939 WO2011115059A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055934 WO2011115055A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
PCT/JP2011/055928 WO2011115049A1 (ja) | 2010-03-15 | 2011-03-14 | 接点開閉装置 |
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CN104412353A (zh) * | 2012-07-06 | 2015-03-11 | 松下知识产权经营株式会社 | 触点装置以及搭载有该触点装置的电磁继电器 |
EP2871661A4 (en) * | 2012-07-06 | 2015-07-22 | Panasonic Ip Man Co Ltd | CONTACT DEVICE AND ELECTROMAGNETIC RELAY WITH THE CONTACT DEVICE |
US9881758B2 (en) | 2012-07-06 | 2018-01-30 | Panasonic Intellectual Property Management Co., Ltd. | Contact device and electromagnetic relay equipped with the contact device |
WO2016017231A1 (ja) * | 2014-07-28 | 2016-02-04 | 富士通コンポーネント株式会社 | 電磁継電器及びコイル端子 |
JP2016031802A (ja) * | 2014-07-28 | 2016-03-07 | 富士通コンポーネント株式会社 | 電磁継電器及びコイル端子 |
US10242829B2 (en) | 2014-07-28 | 2019-03-26 | Fujitsu Component Limited | Electromagnetic relay and coil terminal |
US11120961B2 (en) | 2014-07-28 | 2021-09-14 | Fujitsu Component Limited | Electromagnetic relay and coil terminal |
CN110310797A (zh) * | 2019-07-30 | 2019-10-08 | 苏州耀德科电磁技术有限公司 | 一种双线圈结构三分直流电磁铁 |
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