EP1021814B1 - Electromagnetic relay - Google Patents
Electromagnetic relay Download PDFInfo
- Publication number
- EP1021814B1 EP1021814B1 EP98902727A EP98902727A EP1021814B1 EP 1021814 B1 EP1021814 B1 EP 1021814B1 EP 98902727 A EP98902727 A EP 98902727A EP 98902727 A EP98902727 A EP 98902727A EP 1021814 B1 EP1021814 B1 EP 1021814B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electromagnetic relay
- base
- core
- bobbin
- recited
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- H01H50/042—Different parts are assembled by insertion without extra mounting facilities like screws, in an isolated mounting part, e.g. stack mounting on a coil-support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
-
- 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
-
- 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
- H01H2050/446—Details of the insulating support of the coil, e.g. spool, bobbin, former
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/021—Bases; Casings; Covers structurally combining a relay and an electronic component, e.g. varistor, RC circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
- H01H50/026—Details concerning isolation between driving and switching circuit
-
- 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
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
- H01H50/163—Details concerning air-gaps, e.g. anti-remanence, damping, anti-corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2272—Polarised relays comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature
Definitions
- the present invention relates to an electromagnetic relay featuring structure and methods which engage various components of the relay during assembly and operation.
- An electromagnetic relay according to the preamble of claim 1 is described for example in US-A-5 587 693.
- Electromagnetic relays are known and widely used throughout the electronics industry. Electromagnetic relays generally include a bobbin, a coil wound thereon, a core, a permanent magnet, an armature, a movable contact and at least one stationary contact. These components are assembled to form an electromagnet block. The electromagnet block, together with the remaining components, are mounted on a base. The base also provides a receptacle for electrically connecting terminals from the contacts and electromagnet block to control and load circuits. A cover is typically placed over the relay, engageable with the base, to form a closed casing.
- the components of the electromagnetic relay must be assembled and maintained to precise tolerances.
- working environments for many electromagnetic relays are not predisposed to maintaining precise tolerances (e.g., automobiles, factories, manufacturing and power plants, etc.).
- Environmental conditions such as temperature differentials, vibration, moisture and dust often cause movement between the several components of a relay, thereby altering the required tolerances and detracting from the relay's performance.
- the distance between the movable contact and the stationary contact i.e., the contact gap
- the load placed on the stationary contact by the movable contact i.e., the overtravel
- the distance through which the armature moves to contact the electromagnet i.e., the armature gap
- Each of these design parameters is interrelated due to the movement of the various components. Thus, undesired movement often eventually result in failures of the relays and their related electric circuits.
- the principal objective of this invention is to provide an electromagnetic relay capable of withstanding harsh operating environments while maintaining precise tolerances between its several components.
- the principal objective is accomplished by the various enhancements to the structure of an electromagnetic relay as disclosed and recited herein.
- the present invention provides an electromagnetic relay comprising a base and an electromagnet block on the base comprising a bobbin having a core, at least one winding about the core and a pair of plate-like pole pieces extending perpendicularly from the ends of the core.
- the bobbin also has a pair of end flanges each adjacent one of the pole pieces.
- a means for engaging the end flanges with the pole pieces is provided.
- a projection, or the like extends perpendicularly from each end flange to insertably mate with a dimple or the like in each pole piece. This means for engaging the end flanges with the pole pieces precludes the possibility that the components will be assembled backwards.
- the present invention provides further advantageous structural features of the base and bobbin of an electromagnetic relay.
- the features include a base having a hole therein and a bobbin having a projection extending perpendicularly therefrom, insertably mating with the hole in the base.
- an epoxy may be inserted into the hole.
- the preferred embodiment is a conical projection extending from the bobbin. The pointed distal end of the conical projection will pierce the meniscus of the epoxy within the hole and cause the epoxy to flow down around the projection extending from the bobbin.
- a cavity is formed between a portion of the bobbin and the base. Epoxy will continue to flow down the length of the projection and fill the cavity.
- the bobbin will be permanently affixed to the base after the epoxy cures and will, therefore, not move with respect to the base.
- the present invention discloses and recites a bore having a non-uniform longitudinal cross-sectional area.
- a plurality of flats are also provided along the length of the bore.
- the plurality of flats are tapered, conversely corresponding to the non-uniform cross-sectional area longitudinal with the bore to form longitudinal lands defining a uniform cylindrical cross-sectional area for insertably receiving a core with a correspondingly uniform cylindrical cross-sectional area.
- the non-uniform cross-sectional area of the bore is conical.
- the present invention also discloses and recites a cylindrical core having a center portion and two end portions.
- the end portions are axially aligned with the center portion and have a diameter smaller than a diameter of the center portion.
- a stepped change in diameter occurs to define shoulder portions of the core at the points of change.
- the shoulder portions ensure proper engagement between the core and a pair of pole pieces. More specifically, the preferred embodiment ensures that the pole pieces of the relay are located flush against the end of the electromagnet block thereby minimizing non-working air gaps.
- the present invention further provides another structural feature in the bobbin of an electromagnetic relay as described above.
- the feature is directed to a bobbin comprising a pair of end flanges wherein the end flanges have a plurality of depressions therein.
- two depressions are provided to ensure that a spacing between load and control circuits is maintained.
- the present invention provides yet another structural feature in the bobbin of an electromagnetic relay as described above.
- a bobbin having a pair of end flanges and a center flange, each of said flanges has a coil terminal wire molded therein.
- the winding about the core of the bobbin is routed through a depression in the center flange and connected to each of the coil terminal wires as it is wound about the core. After a permanent connection is made between the winding wire and the coil terminal wires, the terminal wires are formed forward.
- One advantage of a formed forward connection is strain relief of the wire.
- the relay comprises a base 10 which defines a main or bottom plane for the relay.
- a pair of stationary or fixed contact terminals 12 and 14 are fastened in the base 10; these fixed terminals 12 and 14 are disposed perpendicular to the plane of base 10 and are provided with fixed contacts 16 and 18.
- the fixed terminals 12 and 14 are inserted into slots 20 in the base 10 and are fixed by caulking, epoxy or by any other suitable sealant or method.
- coil terminals 22 and 24 and a common coil terminal 26 are fastened in the base 10 in a similar manner.
- a pair of suppression resistors 28 or other components may be arranged on the base 10 and connected to the coil terminals 22, 24 and 26.
- An electromagnet block 30 arranged on the base 10 comprises a bobbin 32 with a pair of coils 34 and 36 wound thereon between end flanges 38 and 40 and a center flange 42.
- the end flanges 38 and 40 are provided with depressions 37.
- An iron core 44 of cylindrical shape is inserted axially into the bobbin 32 and coils 34 and 36 and is coupled at its ends to a pair of plate-like pole pieces 46 and 48 which are provided with dimples 50 and 52 which mate with projections 54 and 56 on end flanges 38 and 40 and are provided with through holes 58 and 60, respectively, corresponding in diameter to the core 44.
- core 44 comprises a center portion 45 and two end portions 47 and 49.
- End portions 47 and 49 are axially aligned with center portion 45. End portions 47 and 49 have a diameter less than a diameter of center portion 45. The change in diameter is stepped thereby forming shoulders at the point of change.
- holes 58 and 60 in pole pieces 46 and 48 have a diameter corresponding to the diameter of end portions 47 and 49.
- FIGS. 2A and 2B illustrate a detail of a preferred embodiment of projections 54 and 56 on end flanges 38 and 40.
- FIGS. 3A and 3B illustrate a detail of a preferred embodiment of dimples 50 and 52 on pole pieces 46 and 48.
- a plate-like elongate permanent magnet 62 is disposed along one lateral side of the bobbin 32 in a plane perpendicular to the plane of base 10 and bridging the end flanges 38 and 40 as well as the pole pieces 46 and 48.
- the permanent magnet 62 is magnetized in a three-pole manner so as to have the same magnetic poles (south poles S) at both ends and the opposite pole (north pole N) in its center.
- An elongate, plate-like armature 64 which is slightly bent into a V-shape, is balanced on the center pole N of the permanent magnet 62 so as to form air gaps between its end portions and either one of the pole pieces 46 and 48. Either end of the armature 64 is divided into a pair of legs 66 and 68, by means of recesses 72 and 74, respectively.
- a strip-like movable contact spring 76 is fastened to the central part of the armature 64 by means of rivets 78 or the like.
- a strip-like movable first braid 80 is engageable with contact spring 76.
- a pair of movable contacts 82 and 84 are fixed to the ends of first braid 80 by welding or any other suitable method.
- a second braid 86 is fixed on a first end to first braid 80 intermediate movable contacts 82 and 84. The second end of second braid 86 is fixed to a movable terminal 88, to carry the load current between the movable contacts 82 and 84 and movable terminal 88.
- Movable terminal 88 is fastened in base 10 in a similar manner as terminals 12 and 14.
- winding terminals 92, 94 and 96 which are anchored in the bobbin flanges 38, 40 and 42, are connected by welding or any other suitable method to the coil terminals 22, 24 and 26.
- depressions 37 provide increased spacing between a pair of plate-like pole pieces 46 and 48 and winding terminals 92 and 94.
- An enclosure 98 may be put over the assembled relay to form a closed casing together with the base 10.
- FIGS. 4, 4A and 4B depict detail views of a base 100 defining a hole 102 and a bobbin 104 comprising a projection 106 extending perpendicularly from a portion of bobbin 104 whereby projection 106 is insertable into hole 102 when base 100 and bobbin 104 are assembled along the broken lines shown therein.
- Projection 106 is shown in a preferred conical configuration.
- FIGS. 5 and 5A depict a bobbin 104 comprising a projection 106 assembled with a base 100 having a hole 102 wherein the projection 106 is inserted into the hole 102.
- FIG. 5A shows an uncured epoxy 108 within hole 102. As shown, a distal pointed end of projection 106 penetrates a meniscus of the uncured epoxy 108 thereby causing the uncured epoxy to flow along the edges of projection 106.
- a cavity 110 is defined between bobbin 104 and base 100. Uncured epoxy 108 flows into cavity 110 from hole 102 as the epoxy flows along the edges of projection 106. The epoxy within cavity 110 will affix bobbin 104 to base 100 as it cures.
- the bobbin 112 comprises a pair of coils 114 and 116 wound thereon between end flanges 118 and 120 and a center flange 122. End flanges 118 and 120 and center flange 122 each have coil terminal wires 124, 126 and 128 molded therein.
- a start lead 130 of coil 114 is connected to terminal wire 124 by soldering or any other suitable means and is wound on bobbin 112.
- a finish lead 132 of coil 114 is routed through a depression in center flange 122 and connected to coil terminal wire 128 in substantially the same manner.
- a start lead 134 of coil 116 is also connected to coil terminal 128 in substantially the same manner and is then wound on bobbin 112.
- a finish lead 136 of coil 116 is connected to coil terminal wire 126 in substantially the same manner as the above connections.
- coil terminal wire 128, finish lead 132 and start lead 134 are formed forward to strain relieve the wires.
- FIG. 10 illustrates a cross-sectional view of a preferred embodiment of a bobbin 138 having a bore 140, the bore 140 having a conical shape.
- FIG. 11 illustrates a perspective view of a preferred embodiment of a pair of fixed terminals 142 and 144 having interference projections 146 thereon. Interference projections 146 ensure an interference fit as terminals 142 and 144 are insertably engaged with a base.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
Abstract
Description
- The present invention relates to an electromagnetic relay featuring structure and methods which engage various components of the relay during assembly and operation. An electromagnetic relay according to the preamble of claim 1 is described for example in US-A-5 587 693.
- Electromagnetic relays are known and widely used throughout the electronics industry. Electromagnetic relays generally include a bobbin, a coil wound thereon, a core, a permanent magnet, an armature, a movable contact and at least one stationary contact. These components are assembled to form an electromagnet block. The electromagnet block, together with the remaining components, are mounted on a base. The base also provides a receptacle for electrically connecting terminals from the contacts and electromagnet block to control and load circuits. A cover is typically placed over the relay, engageable with the base, to form a closed casing.
- To function properly, the components of the electromagnetic relay must be assembled and maintained to precise tolerances. Unfortunately, working environments for many electromagnetic relays are not predisposed to maintaining precise tolerances (e.g., automobiles, factories, manufacturing and power plants, etc.). Environmental conditions such as temperature differentials, vibration, moisture and dust often cause movement between the several components of a relay, thereby altering the required tolerances and detracting from the relay's performance. For example, the distance between the movable contact and the stationary contact, i.e., the contact gap; the load placed on the stationary contact by the movable contact, i.e., the overtravel; and the distance through which the armature moves to contact the electromagnet, i.e., the armature gap; must all be set and maintained within precise limits. Each of these design parameters is interrelated due to the movement of the various components. Thus, undesired movement often eventually result in failures of the relays and their related electric circuits.
- Therefore, to resolve the long-standing problem of the detrimental effects on relays and their associated electric circuits, a need exists for electromagnetic relays that provide structure and are assembled in such a fashion as to withstand the adversities of harsh operating environments while still maintaining precise tolerances. Structural enhancements to various components of the electromagnetic relay are provided herein which will eliminate movement between the components and therefore provide a more reliable relay.
- The principal objective of this invention is to provide an electromagnetic relay capable of withstanding harsh operating environments while maintaining precise tolerances between its several components. The principal objective is accomplished by the various enhancements to the structure of an electromagnetic relay as disclosed and recited herein.
- The present invention provides an electromagnetic relay comprising a base and an electromagnet block on the base comprising a bobbin having a core, at least one winding about the core and a pair of plate-like pole pieces extending perpendicularly from the ends of the core. The bobbin also has a pair of end flanges each adjacent one of the pole pieces. A means for engaging the end flanges with the pole pieces is provided. In a preferred embodiment, a projection, or the like, extends perpendicularly from each end flange to insertably mate with a dimple or the like in each pole piece. This means for engaging the end flanges with the pole pieces precludes the possibility that the components will be assembled backwards.
- The present invention provides further advantageous structural features of the base and bobbin of an electromagnetic relay. The features include a base having a hole therein and a bobbin having a projection extending perpendicularly therefrom, insertably mating with the hole in the base. With the bobbin assembled to the base, an epoxy may be inserted into the hole. The preferred embodiment is a conical projection extending from the bobbin. The pointed distal end of the conical projection will pierce the meniscus of the epoxy within the hole and cause the epoxy to flow down around the projection extending from the bobbin. Furthermore, a cavity is formed between a portion of the bobbin and the base. Epoxy will continue to flow down the length of the projection and fill the cavity. The bobbin will be permanently affixed to the base after the epoxy cures and will, therefore, not move with respect to the base.
- Another advantageous structural feature is incorporated into the shapes of the bore and core within the bobbin. The present invention discloses and recites a bore having a non-uniform longitudinal cross-sectional area. A plurality of flats are also provided along the length of the bore. The plurality of flats are tapered, conversely corresponding to the non-uniform cross-sectional area longitudinal with the bore to form longitudinal lands defining a uniform cylindrical cross-sectional area for insertably receiving a core with a correspondingly uniform cylindrical cross-sectional area. In one preferred embodiment, the non-uniform cross-sectional area of the bore is conical. The present invention also discloses and recites a cylindrical core having a center portion and two end portions. In a preferred embodiment, the end portions are axially aligned with the center portion and have a diameter smaller than a diameter of the center portion. A stepped change in diameter occurs to define shoulder portions of the core at the points of change. The shoulder portions ensure proper engagement between the core and a pair of pole pieces. More specifically, the preferred embodiment ensures that the pole pieces of the relay are located flush against the end of the electromagnet block thereby minimizing non-working air gaps.
- The present invention further provides another structural feature in the bobbin of an electromagnetic relay as described above. The feature is directed to a bobbin comprising a pair of end flanges wherein the end flanges have a plurality of depressions therein. In a preferred embodiment, two depressions are provided to ensure that a spacing between load and control circuits is maintained.
- The present invention provides yet another structural feature in the bobbin of an electromagnetic relay as described above. In a bobbin having a pair of end flanges and a center flange, each of said flanges has a coil terminal wire molded therein. In a preferred embodiment, the winding about the core of the bobbin is routed through a depression in the center flange and connected to each of the coil terminal wires as it is wound about the core. After a permanent connection is made between the winding wire and the coil terminal wires, the terminal wires are formed forward. One advantage of a formed forward connection is strain relief of the wire.
- For a better understanding of the invention, reference is made to the following description of an exemplary embodiment thereof, and to the accompanying drawings, wherein:
- FIG. 1 is an exploded perspective view of an electromagnetic relay constructed in accordance with a preferred embodiment of the present invention;
- FIG. 2A is an enlarged fragmentary view of an end flange with a projection therefrom;
- FIG. 2B an enlarged side view of an end flange with a projection therefrom;
- FIG. 3A is an enlarged fragmentary view of a typical pole piece having a dimple therein;
- FIG. 3B is an enlarged side view of a typical pole piece having a dimple therein;
- FIG. 4 is an enlarged fragmentary perspective view of a bobbin having a projection and a base having a hole;
- FIG. 4A is an enlarged perspective view of a portion of the base defining a hole;
- FIG. 4B is an enlarged perspective view of a projection on a bobbin;
- FIG. 5 is an enlarged view of a bobbin having a projection inserted into a base having a hole with epoxy in the hole;
- FIG. 5A is an enlarged fragmentary view of a bobbin having a projection inserted into a base having a hole with epoxy in the hole;
- FIG. 6 is an enlarged view of epoxy filling a cavity between a bobbin and a base;
- FIG. 6A is an enlarged fragmentary view of epoxy filling a cavity between a bobbin and a base;
- FIG. 7 is a fragmentary top view of a bobbin and coil wound thereon;
- FIG. 8 is a fragmentary side view of a bobbin and a coil wound thereon;
- FIG. 9 is a fragmentary cross-sectional view of a bobbin and coil taken along line 9-9 of FIG. 8;
- FIG. 10 is a fragmentary cross-sectional view of a bobbin having a bore of conical shape; and
- FIG. 11 is a fragmentary perspective view of a pair of fixed terminals having interference projections.
-
- Referring now to FIG. 1, there is shown an electromagnetic relay of the present invention illustrated generally at 8. The relay comprises a base 10 which defines a main or bottom plane for the relay. A pair of stationary or fixed
contact terminals 12 and 14 are fastened in thebase 10; these fixedterminals 12 and 14 are disposed perpendicular to the plane ofbase 10 and are provided with fixedcontacts 16 and 18. The fixedterminals 12 and 14 are inserted intoslots 20 in thebase 10 and are fixed by caulking, epoxy or by any other suitable sealant or method. Further,coil terminals common coil terminal 26 are fastened in the base 10 in a similar manner. A pair ofsuppression resistors 28 or other components may be arranged on thebase 10 and connected to thecoil terminals - An
electromagnet block 30 arranged on thebase 10 comprises abobbin 32 with a pair ofcoils end flanges center flange 42. The end flanges 38 and 40 are provided withdepressions 37. Aniron core 44 of cylindrical shape is inserted axially into thebobbin 32 and coils 34 and 36 and is coupled at its ends to a pair of plate-like pole pieces dimples projections 54 and 56 onend flanges holes core 44. In a preferred embodiment,core 44 comprises acenter portion 45 and twoend portions End portions center portion 45.End portions center portion 45. The change in diameter is stepped thereby forming shoulders at the point of change. In a preferred embodiment, holes 58 and 60 inpole pieces end portions projections 54 and 56 onend flanges dimples pole pieces - A plate-like elongate
permanent magnet 62 is disposed along one lateral side of thebobbin 32 in a plane perpendicular to the plane ofbase 10 and bridging theend flanges pole pieces permanent magnet 62 is magnetized in a three-pole manner so as to have the same magnetic poles (south poles S) at both ends and the opposite pole (north pole N) in its center. An elongate, plate-like armature 64 which is slightly bent into a V-shape, is balanced on the center pole N of thepermanent magnet 62 so as to form air gaps between its end portions and either one of thepole pieces armature 64 is divided into a pair oflegs recesses - A strip-like
movable contact spring 76 is fastened to the central part of thearmature 64 by means ofrivets 78 or the like. A strip-like movablefirst braid 80 is engageable withcontact spring 76. A pair ofmovable contacts 82 and 84 are fixed to the ends offirst braid 80 by welding or any other suitable method. Asecond braid 86 is fixed on a first end tofirst braid 80 intermediatemovable contacts 82 and 84. The second end ofsecond braid 86 is fixed to amovable terminal 88, to carry the load current between themovable contacts 82 and 84 andmovable terminal 88.Movable terminal 88 is fastened inbase 10 in a similar manner asterminals 12 and 14. - When the relay parts are assembled along the broken lines shown in FIG. 1, winding
terminals bobbin flanges coil terminals depressions 37 provide increased spacing between a pair of plate-like pole pieces terminals enclosure 98 may be put over the assembled relay to form a closed casing together with thebase 10. - FIGS. 4, 4A and 4B depict detail views of a base 100 defining a
hole 102 and abobbin 104 comprising aprojection 106 extending perpendicularly from a portion ofbobbin 104 wherebyprojection 106 is insertable intohole 102 whenbase 100 andbobbin 104 are assembled along the broken lines shown therein.Projection 106 is shown in a preferred conical configuration. - FIGS. 5 and 5A depict a
bobbin 104 comprising aprojection 106 assembled with a base 100 having ahole 102 wherein theprojection 106 is inserted into thehole 102. FIG. 5A shows anuncured epoxy 108 withinhole 102. As shown, a distal pointed end ofprojection 106 penetrates a meniscus of theuncured epoxy 108 thereby causing the uncured epoxy to flow along the edges ofprojection 106. As depicted in FIGS. 6 and 6A, acavity 110 is defined betweenbobbin 104 andbase 100.Uncured epoxy 108 flows intocavity 110 fromhole 102 as the epoxy flows along the edges ofprojection 106. The epoxy withincavity 110 will affixbobbin 104 tobase 100 as it cures. - Referring now to FIGS. 7, 8 and 9, there is shown a bobbin of an electromagnetic relay of the present invention. The
bobbin 112 comprises a pair ofcoils end flanges center flange 122.End flanges center flange 122 each havecoil terminal wires start lead 130 ofcoil 114 is connected toterminal wire 124 by soldering or any other suitable means and is wound onbobbin 112. Afinish lead 132 ofcoil 114 is routed through a depression incenter flange 122 and connected tocoil terminal wire 128 in substantially the same manner. Astart lead 134 ofcoil 116 is also connected tocoil terminal 128 in substantially the same manner and is then wound onbobbin 112. Afinish lead 136 ofcoil 116 is connected tocoil terminal wire 126 in substantially the same manner as the above connections. In a preferred embodiment,coil terminal wire 128,finish lead 132 and startlead 134 are formed forward to strain relieve the wires. - FIG. 10 illustrates a cross-sectional view of a preferred embodiment of a
bobbin 138 having a bore 140, the bore 140 having a conical shape. - FIG. 11 illustrates a perspective view of a preferred embodiment of a pair of fixed
terminals 142 and 144 havinginterference projections 146 thereon.Interference projections 146 ensure an interference fit asterminals 142 and 144 are insertably engaged with a base.
Claims (16)
- An electromagnetic relay (8) comprising:a base (10) defining a bottom plane; an electromagnet block (30) on the base (10) having a core (44), means for exciting a coil (34, 36) including a bobbin (32) and at least one winding about the core (44), a pair of pole pieces (46, 48) extending perpendicularly from the ends of said core (44), said bobbin (32) having a pair of end flanges (38,40) each adjacent one of said pole pieces (46, 48);an elongate armature (64) pivotally supported at its central portion to be movable about a center pivot axis for angular movement between two contact operating positions, either end portion of the armature (64) on either side of the pivot axis defining an air gap with one of said pole pieces (46, 48);a permanent magnet (62) coupled magnetically between said core (44) and said armature (64) so as to induce the same magnetic poles in both said pole pieces (46, 48) and to provide an opposite pole in closely adjacent relationship to said central portion of the armature (64);at least one movable contact spring (76) fixedly connected to the armature (64) at a portion intermediate the ends thereof and being formed with contact arms in the vicinity of either armature end portion, said contact arms carrying movable contacts (82, 84) to be moved according to the armature movement in and out of contact with corresponding fixed contacts (16, 18) mounted on said base (10);and a conductor (80, 86) connecting said contact arms with a movable contact terminal (88) mounted on said base (10), characterized in that said end flanges (38, 40) have a projection (54, 36) extending perpendicularly therefrom and said pole pieces (46, 48) have a dimple (50, 52), said projection (54, 56) insertably mating with said dimple (50, 52), wherein said core (44) is cylindrical, said core (44) comprising a center portion (45) and two end portions (47, 49), said end portions (47, 49) having a diameter less than a diameter of said center portion (45) and wherein each of said pole pieces (46, 48) has a hole (58, 60) therein corresponding to a diameter of said two end portions (47, 49) of said core (44), for insertably receiving said two end portions (47, 49) in said holes (58, 60) in said pole pieces (46, 48).
- An electromagnetic relay (8) according to claim 1, characterized in that the base (100) defines a bottom plane and has a hole (102) therein;
a projection (106) extending perpendicularly from said bobbin (104) insertably mating with said hole (102) in said base (100). - An electromagnetic relay (8) as recited in claim 2, wherein said projection (106) is conical in shape, a distal pointed end of said projection (106) is insertably aligned in said hole (106) in said base (100).
- An electromagnetic relay (8) as recited in claims 2 or 3, wherein said hole (102) and said projection (106) define a means for affixing said bobbin (104) to said base (100) by inserting an epoxy (108) into said hole (102), said conical projection (106) penetrating a meniscus in said epoxy (108) causing said epoxy (108) to flow around said projection (106) to fill a void formed between said conical projection (106) and a portion of the base (100) forming a perimeter around said hole (102).
- An electromagnetic relay (8) as recited in claim 4, wherein a cavity (110) is formed between said bobbin (104) and said base (100) wherein said cavity (110) is filled with said epoxy (108).
- An electromagnetic relay (8) according to one of the claims 1 to 5, characterized in that the electromagnet block (30) mounted on the base (10) has the core (44), the bobbin (138) having a bore (140) and at least one winding about said bore (140), said core (44) being insertable within said bore (140), said bore (140) having a non-uniform cross-sectional area along a length of said bore (140).
- An electromagnetic relay (8) as recited in claim 6, wherein said non-uniform cross-sectional area of said bore (140) is conical.
- An electromagnetic relay (8) as recited in claim 6, wherein a plurality of flat members form a plurality of longitudinal lands along an axis of said bore (140).
- An electromagnetic relay (8) as recited in claim 8, wherein said plurality of flat members have a non-uniform cross-sectional area conversely corresponding to said non-uniform cross-sectional area of said bore (140), along a longitudinal length of said bore (140), forming longitudinal lands defining a uniform cylindrical cross-sectional area for insertably receiving a core (44) having a correspondingly uniform cylindrical cross-sectional area.
- An electromagnetic relay (8) according to one of the claims 1 to 9, characterized by the base (10) defining the bottom plane and by means (118, 120) for increasing a spacing between said pair of pole pieces (46, 48) and a terminal of said at least one winding.
- An electromagnetic relay (8) as recited in claim 10, wherein said means for increasing a spacing between a load circuit and a control circuit comprises a pair of end flanges (118, 120) having a plurality of depressions.
- An electromagnetic relay (8) according to one of the claims 1 to 11, characerized by a center flange (42) intermediate said pair of end flanges (38, 40), said pair of end flanges (38, 40) and said center flange (42) each having a coil terminal wire (92, 94 96) molded therein.
- An electromagnetic relay (8) as recited in claim 12, wherein said at least one winding about the core (44) is connected to said coil terminal wires (38, 40, 42) molded in said pair of end flanges (38, 40) and said center flange (42).
- An electromagnetic relay (8) as recited in claim 13, wherein said center flange (42) has a depression.
- An electromagnetic relay (8) as recited in claim 14, wherein said at least one winding about the core (44) is routed through said depression in said center flange (42).
- An electromagnetic relay (8) as recited in claim 15, wherein said terminal wires (38, 40, 42) are formed forward after connection to said at least one winding.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US796165 | 1991-11-22 | ||
US79616597A | 1997-02-06 | 1997-02-06 | |
PCT/US1998/001534 WO1998035371A2 (en) | 1997-02-06 | 1998-01-26 | Flow hole and flow projection |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1021814A2 EP1021814A2 (en) | 2000-07-26 |
EP1021814B1 true EP1021814B1 (en) | 2001-12-12 |
Family
ID=25167494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98902727A Expired - Lifetime EP1021814B1 (en) | 1997-02-06 | 1998-01-26 | Electromagnetic relay |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1021814B1 (en) |
JP (1) | JP2001510628A (en) |
KR (1) | KR20000070845A (en) |
CN (1) | CN1129940C (en) |
DE (1) | DE69802955T2 (en) |
TW (1) | TW405137B (en) |
WO (1) | WO1998035371A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101930821B (en) * | 2009-06-25 | 2012-11-14 | 浙江三花股份有限公司 | Electromagnetic coil device |
JP5624431B2 (en) * | 2010-11-08 | 2014-11-12 | パナソニック株式会社 | Electromagnetic relay |
DE102012006434A1 (en) * | 2012-03-30 | 2013-10-02 | Phoenix Contact Gmbh & Co. Kg | coil assembly |
JP6074845B2 (en) * | 2012-08-03 | 2017-02-08 | パナソニックIpマネジメント株式会社 | Contact device and electromagnetic relay equipped with the contact device |
CN114749272B (en) * | 2022-04-18 | 2022-12-13 | 湖南中科电气股份有限公司 | Scrap steel magnetic separation system and method |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4801908A (en) * | 1987-09-25 | 1989-01-31 | Emhart Industries, Inc. | Small relay for automated assembly |
US5070315A (en) * | 1989-05-26 | 1991-12-03 | Omron Corporation | Electromagnetic relay |
US5587693A (en) * | 1995-08-07 | 1996-12-24 | Siemens Electromechanical Components, Inc. | Polarized electromagnetic relay |
-
1998
- 1998-01-26 DE DE69802955T patent/DE69802955T2/en not_active Expired - Lifetime
- 1998-01-26 CN CN98802339A patent/CN1129940C/en not_active Expired - Fee Related
- 1998-01-26 EP EP98902727A patent/EP1021814B1/en not_active Expired - Lifetime
- 1998-01-26 JP JP53477298A patent/JP2001510628A/en not_active Abandoned
- 1998-01-26 KR KR1019997007110A patent/KR20000070845A/en not_active Application Discontinuation
- 1998-01-26 WO PCT/US1998/001534 patent/WO1998035371A2/en not_active Application Discontinuation
- 1998-02-05 TW TW087101496A patent/TW405137B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP1021814A2 (en) | 2000-07-26 |
TW405137B (en) | 2000-09-11 |
JP2001510628A (en) | 2001-07-31 |
DE69802955D1 (en) | 2002-01-24 |
KR20000070845A (en) | 2000-11-25 |
CN1246957A (en) | 2000-03-08 |
WO1998035371A2 (en) | 1998-08-13 |
DE69802955T2 (en) | 2002-08-08 |
WO1998035371A3 (en) | 1998-11-05 |
CN1129940C (en) | 2003-12-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1174896A2 (en) | Electromagnetic relay | |
US7135946B2 (en) | Electromagnetic relay having at least one relay actuator and a receptacle for relay actuators | |
KR100500535B1 (en) | electromagnetic relay and appatus having thereof | |
US4734668A (en) | Electromagnetic relay | |
US4101855A (en) | Miniature relay | |
CA2306787C (en) | Method for manufacturing a relay | |
US5291166A (en) | Electromagnetic relay with resistor and method for manufacturing the same | |
JP3308544B2 (en) | Electromagnetic relay | |
KR19990036798A (en) | Apparatus and method for connecting electronic relays and electrical components | |
EP1021814B1 (en) | Electromagnetic relay | |
EP0907198B1 (en) | Structure and method for connection of an electrical component to an electromagnetic relay | |
JPH05314885A (en) | Electromagnetic relay | |
CA1157502A (en) | Plug-in type electric relay and method of manufacture | |
US4186363A (en) | Solenoid assembly for elevated temperature service | |
US4975739A (en) | Electromagnetic relay | |
US4801908A (en) | Small relay for automated assembly | |
CN112582209A (en) | Relay with a movable contact | |
JPH06165443A (en) | Motor | |
CN218866993U (en) | Relay with a movable contact | |
CA1192242A (en) | Electromagnetic relay | |
CN218996614U (en) | Relay and base sealing structure thereof | |
US6411189B1 (en) | Structure of spool of electromagnetic relay | |
JPH037926Y2 (en) | ||
JP3666096B2 (en) | Electromagnetic relay and manufacturing method thereof | |
JPH10134692A (en) | Electromagnetic relay |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19990625 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TYCO ELECTROMECHANICAL COMPONENTS, INC. |
|
RTI1 | Title (correction) |
Free format text: ELECTROMAGNETIC RELAY |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TYCO ELECTRONICS CORPORATION |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
17Q | First examination report despatched |
Effective date: 20010423 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
REF | Corresponds to: |
Ref document number: 69802955 Country of ref document: DE Date of ref document: 20020124 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20060117 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20060131 Year of fee payment: 9 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20070126 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20070930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070126 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070131 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20060119 Year of fee payment: 9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20070126 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20150128 Year of fee payment: 18 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69802955 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20160802 |