EP0178667A2 - Relais électromagnétique - Google Patents

Relais électromagnétique Download PDF

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Publication number
EP0178667A2
EP0178667A2 EP85113201A EP85113201A EP0178667A2 EP 0178667 A2 EP0178667 A2 EP 0178667A2 EP 85113201 A EP85113201 A EP 85113201A EP 85113201 A EP85113201 A EP 85113201A EP 0178667 A2 EP0178667 A2 EP 0178667A2
Authority
EP
European Patent Office
Prior art keywords
contact
rocker
armature
relay according
relay
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.)
Ceased
Application number
EP85113201A
Other languages
German (de)
English (en)
Other versions
EP0178667A3 (fr
Inventor
Bernhard Dipl.-Ing. Dietrich (Fh)
Ernst Dipl.-Phys. Dr. Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SDS RELAIS AG
Panasonic Electric Works Europe AG
Original Assignee
Euro Matsushita Electric Works AG
SDS RELAIS AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Euro Matsushita Electric Works AG, SDS RELAIS AG filed Critical Euro Matsushita Electric Works AG
Publication of EP0178667A2 publication Critical patent/EP0178667A2/fr
Publication of EP0178667A3 publication Critical patent/EP0178667A3/fr
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to an electromagnetic relay of the type specified in the preamble of claim 1.
  • a relay of the type described at the outset is known from German Offenlegungsschrift 2 913 106.
  • a movable contact element designed as a leaf spring is integrally formed on a contact connector, welded or rigidly attached in some other way, and his two arms are actuated by actuating pieces provided on the arms of the rocker armature in such a way that they are pressed away from the respective fixed contact in order to open the contact against their spring preload.
  • the force exerted by the magnet system which is maximum in the position of the armature in which it forms a minimal working air gap with one of its arms, serves to deflect the contact spring into the open position, while the contact force is only exerted by the contact spring in its less deflected state is applied and is therefore relatively small. At least the above requirement (c) is thus not met.
  • the other requirements mentioned above are not addressed there or are not optimally met.
  • An electromagnetic relay is also known from German Offenlegungsschrift 3 232 679, which is intended for motor vehicles, but in which the switching current is conducted via parts which are soft-magnetic and therefore have poor conductivity. Furthermore, there is either a flexible wire required to achieve a single break in the switching circuit, which is problematic in terms of reliable and low-resistance connection to the other current carrying parts, or a double break is used in which the contact resistance occurs twice. At the same time, changes in the relay structure are required to achieve different switching functions. Finally, this known relay is constructed in such a way that it is susceptible to vibrations under normal manufacturing tolerances.
  • the invention is based on the general object of at least partially eliminating disadvantages such as those which occur in comparable relays according to the prior art.
  • a more specific object of the invention can be seen in providing an electromagnetic relay of the type mentioned at the outset, its contact system is suitable for higher current loads due to low contact loss capacities and high contact pressures.
  • the contact arrangement provided thereafter makes it possible to utilize a maximum of the actuating force exerted on the armature for the contact force and thus to achieve low contact transition resistance, so that with a given switching current only a minimum of power loss occurs at the contact.
  • this contact arrangement can be accommodated on a small scale and creates the conditions for the switching current paths to be very short and for the different switching functions required in motor vehicle relays to be able to be implemented without changing the relay structure.
  • the embodiment of the invention according to claim 2 offers the advantage of a simple and secure, at the same time freely movable mounting of the contact rocker and in particular allows, according to claim 3, the bearing point itself to be used as a center contact connection.
  • the developments according to claims 4 and 5 are advantageous from the standpoint of a simple construction of the contact arrangement.
  • the embodiment of the invention according to claim 6 has the advantage that a particularly large cross-section is available for conducting the switching current, the development according to claim 7 being inexpensive from the point of view of production from a few and simple individual parts.
  • the embodiment according to claim 8 is used for safe anchorage
  • the embodiment according to claim 9 is the possibility of equipping the contact system with parallel contacts or with double interruption
  • the embodiment according to claim 10 is advantageous with regard to short switching current paths and a compact structure of the entire relay especially when a relay has to be provided with round connections.
  • the relay is constructed from the following essential components:
  • the base plate 10 is essentially square and is equipped with the contact connections 23 to 26 and 29 in the area of its four corners and in the center. These contact connections are inserted from above into bores, with a common one Kop 31 in an enlarged part of the respective hole and are anchored by a compression from below.
  • the upper end of the fixed contact terminals 23 to 26 is shaped as a contact piece, and its lower end is shaped as a connecting pin projecting downward from the base plate.
  • the central fixed contact connection 29 is provided at its upper end with a bearing cutter for the contact rocker 21, and shaped at its lower end in the same way as the other fixed contact connections 23 to 26.
  • the base plate 10 is also provided in the middle between the outer fixed contact connections on two opposite sides with the coil connections 27, 28 and on a third side with a further connection 70 (cf. FIG. 9).
  • the bobbin 12 carrying the winding 13 has a central bore through which the core 14 made of soft iron runs.
  • the upper flange of the bobbin 12 is provided with a central recess 38 into which the upper pole plate 18 and the permanent magnet 15 are inserted.
  • the permanent magnet 15 is magnetized in such a way that in its right part in FIG. 1 it has an NS magnetization that runs from bottom to top and in its left part an NS magnetization that runs in the opposite direction from top to bottom .
  • L-shaped yoke plates 16, 17 are suspended on the coil body 12 in such a way that they each rest with their shorter legs on one half of the permanent magnet 15 and with their longer legs over the outside of the winding 13 run below, pass through the lower flange of the bobbin 12 and protrude slightly downwards from its lower surface.
  • the yoke plates 16, 17 are held by recesses into which - as can be seen from the upper left part of FIG. 1 - hook-like projections 40 of the coil body 12 engage.
  • the elongated lower pole plate 19 engages in a recess provided in the lower coil former flange and extends with its larger axis perpendicular to the plane of the drawing in FIG. 1.
  • the thickness of the lower pole plate 19 and the vertical dimension of the recess 41 are chosen such that the pole plate protrudes from the coil former flange by the same amount as the lower ends of the yoke plates 16, 17.
  • the contact rocker 21 which is similar to the armature 20 according to FIG. 2 and is made of highly conductive spring material, is bent in a W-shape in the section shown in FIG. 1 and is supported by the upward-pointing central bend 42 on the formed from the upper end of the contact terminal 29 and carries on each of its four arms a contact piece 43 which faces the contact piece provided at the upper end of the fixed contact connections 23 to 26.
  • the four lateral ends of the contact rocker 21 are bent upward and each have a breakthrough 44 in this part, which is penetrated by a corresponding nose 45 of the armature 20.
  • the contact rocker 21 is pretensioned in such a way that its ends seek to pull the four lugs 45 of the armature 20 downward according to FIG. 1.
  • the armature 20 has a central bore 46 through which the helical compression spring 22 runs, which presses the contact rocker 21 against the bearing blade with its lower end and engages with its upper end in a central bore in the core 14.
  • the contact rocker 21 is fixed on the bearing cutting edge and at the same time a reliable contact between the contact bridge 21 and the contact connection 29 is guaranteed.
  • the compression spring 22 via the core 14 and the lower pole plate 19 firmly connected to it, pushes the coil body 12 away from the base plate 10, so that the magnet formed by the components 14 to 19, firmly coupled by the attraction of the permanent magnet 15 construction is positioned by not shown locking elements relative to the bobbin 12 and the base plate 10.
  • the compression spring 22 is located on the underside of the lower pole plate 19 ', the central bores in the pole plate 19' and in the core 14 being eliminated. A firm connection between the lower pole plate 19 'and the core 14 is not necessary in this case.
  • the armature 20 can be tilted about a pivot axis perpendicular to the plane of the drawing in FIG. 1 and to the axis of the coil body 12. Its two arms 47 and 48 form an obtuse angle with one another along this pivot axis, so that in each switching position one arm (47 in FIG. 1) is flush with the lower pole plate (19 in FIG. 1) and at the lower end of the relevant yoke plate ( 17 in Fig. 1), while the other arm (48 in Fig. 1) of the armature 20 runs obliquely downwards. In the position shown in Fig.
  • the housing cap 11 which results in approximately a cube shape, the lower edge of which engages around the base plate 10 and, as indicated at 53 in FIG. 1, is sealed off from it.
  • the housing cap 11 When the housing cap 11 is put on as the last assembly step of the relay, it snaps onto the base plate 10 (with moldings not shown), shortly before a web integrally formed on the upper inner surface of the housing cap 11 the permanent magnet 15 rests.
  • the housing cap 11 Opposite the coil body 12, the housing cap 11 is positioned in its upper part in one direction by outer surfaces of the hook-like projections 40 (FIG. 1) and in the other direction by guide ribs (not shown).
  • the left region of the permanent magnet 15 causes a magnetic flux from the N pole via the left yoke plate 17, the left arm 47 of the armature 20, the lower pole plate 19, the core 14 and the upper one Pole plate 18 to the S pole of the permanent magnet 15.
  • the magnetic flux starting from the right area of the permanent magnet 15 and passing through the right yoke plate 16 and the right arm 48 of the armature 20 is substantially less due to the large air gap between the yoke plate 16 and the armature 20 , so that the attraction created here is negligible.
  • the permanent magnet 15 thus causes the armature 20 to be held securely in its respective position in the de-energized state of the winding 13 and generates sufficiently high forces on the closed contacts.
  • the armature 20 is formed by stampings 49
  • a monostable switching characteristic can be achieved, for example, in that the permanent magnet shown concentrically in FIG. 1 is arranged eccentrically, so that it generates a stronger magnetic flux via one yoke plate 16 or 17 than via the other yoke plate.
  • Another possibility of achieving a monostable switching behavior is to provide a spring which, when the winding 13 is not excited, resets the armature 20 to an end position.
  • the variant according to FIG. 3 differs from the relay according to FIG. 1 in that the center contact connection 29 is replaced by an upwardly projecting projection 34 which is formed on the base plate 10 and which forms the bearing edge for the contact rocker 21. In this case, no center connection is provided for the contact rocker 21.
  • the embodiment according to FIG. 5 also differs from that according to FIG. 4 in that the central contact connection 29 'is designed in exactly the same way as the other four contact connections 23 ... 26, which leads to savings in the manufacture of the relay
  • the central contact connection 29 ' is designed in exactly the same way as the other four contact connections 23 ... 26, which leads to savings in the manufacture of the relay
  • This latter contact piece like the one indicated the contact connections 23 ... 26 provided contact pieces on a spherical upper surface, so that in this case the contact rocker 21 "is pivotally mounted about its center.
  • FIGS. 6 to 8 differ from those according to FIGS. 1 to 5 in that the contact rocker 72 or 72 ', in contrast to the contact rocker 21, 21' or 21 "formed by a resilient element, consists of an essentially rigid one
  • the resilient force transmission from the armature 20 to the respective contact takes place in the exemplary embodiments according to FIGS. 6 to 8 via a leaf spring 73 or 73 'arranged between the armature and the contact rocker.
  • the rigid contact rocker 72 is 4 ', similarly to the contact rocker 21' in Fig. 4, is supported on a bearing blade provided at the upper end of the intermediate contact connection 29. In all cases, this bearing blade can alternatively be replaced by a projection 34 formed on the base plate 10 according to Fig. 3, if one Center connection for the contact rocker is not required.
  • the armature 20 and the rigid contact rocker 72 have a similar H-shape in plan view, as shown in FIG. 2.
  • This shape also applies to the leaf spring 73, on which middle arms 74 are cut out and bent downwards, which are the contact press rocker 72 down. With its four outer arms, the leaf spring 73 is biased against the arms of the rocker armature 20, in the middle against a downwardly projecting finger 75, which is molded onto the core 14 and penetrates a central bore in the lower pole plate 19 and in the rocker armature 20.
  • the anchor rocker 72 ' is again essentially H-shaped, the ends of the four legs of the H-shape being bent upwards and provided with incisions running from the inside to form hooks 76 are.
  • the central web of the H-shaped rocker contact 72 ' is also bent upwards on both edges and forms upwardly projecting webs 77, each of which extends further upward in its central part 78 than in its lateral regions.
  • 8 is also essentially H-shaped, but has a smaller width than d '.
  • Contact rocker 72' Furthermore, the central web of the leaf spring 73 1 is provided with laterally projecting flags 79.
  • the leaf spring 73 ' is pushed in the lateral direction, according to FIG. 8, for example, from left to right, into the rigid contact rocker 72' in such a way that its two side legs, which are located above and below in FIG. 8, catch the hooks formed on the contact rocker 72 ' 76 reach under.
  • the leaf spring 73 ' is in one lateral direction (right-hand left in FIG.
  • the leaf spring 73 ' When installed in the relay, the leaf spring 73 'is biased downwards in its middle by the compression spring 22, which presses the contact rocker 72' against the cutting edge, so that the lateral arms of the leaf spring 73 'are deflected upwards and against the lower ones Lay arms of the again H-shaped rocker anchor 20.
  • the center contact connection 29 is assigned, so that a simple changeover function (FIG. 9a) or two parallel work or normally closed contacts (FIG. 9b) or two parallel changeover contacts (FIG. 9d ) or a switching behavior with double interruption (Fig. 9e) can be achieved by assigning the connections externally differently with the relay structure unchanged.
  • the circuit according to Fig. 9e can also be used in the same way as that according to Fig. 9 d as a switch with parallel contacts (instead of double break).
  • the circuit diagram according to Fig. 9c shows a type of assignment similar to FIG. 9e, which, however, can only be used as a switch with double break, since the contact rocker is not connected here. If only this relay function is required, the center contact connection 29 can be omitted, as shown in FIG. 3.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Motor Or Generator Frames (AREA)
EP85113201A 1984-10-18 1985-10-17 Relais électromagnétique Ceased EP0178667A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3438274 1984-10-18
DE19843438274 DE3438274A1 (de) 1984-10-18 1984-10-18 Elektromagnetisches relais

Publications (2)

Publication Number Publication Date
EP0178667A2 true EP0178667A2 (fr) 1986-04-23
EP0178667A3 EP0178667A3 (fr) 1988-08-31

Family

ID=6248252

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113201A Ceased EP0178667A3 (fr) 1984-10-18 1985-10-17 Relais électromagnétique

Country Status (2)

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EP (1) EP0178667A3 (fr)
DE (1) DE3438274A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107403707A (zh) * 2017-08-25 2017-11-28 戴丁志 稳磁式接触器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE814468C (de) * 1949-10-25 1951-09-24 Herbert Dr Hausrath Waelzankermagnet
US4092620A (en) * 1976-03-22 1978-05-30 Leach Corporation Electrical connection for the moving contacts of a relay
DE2905686A1 (de) * 1978-02-27 1979-08-30 Iskra Miniatur-relais fuer kurze umschaltzeiten
DE2913106A1 (de) * 1978-04-17 1979-10-25 Int Standard Electric Corp Elektromagnetisches relais mit zwangsgefuehrten kontakten
DE3232679A1 (de) * 1981-09-04 1983-03-17 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches schaltrelais fuer hohe strombelastung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL61885C (fr) * 1941-12-15
US3693120A (en) * 1971-06-23 1972-09-19 Cutler Hammer Inc Electromagnetic relay
DE2626752C2 (de) * 1976-06-15 1986-01-02 Brown, Boveri & Cie Ag, 6800 Mannheim Bistabiles, elektromagnetisches Kraftschaltglied kleiner Bauart
US4342016A (en) * 1979-08-20 1982-07-27 Nippon Electric Co., Ltd. Transfer-type electromagnetic relay comprising a coil around a housing of the relay and an armature carrying movable contacts at both ends

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE814468C (de) * 1949-10-25 1951-09-24 Herbert Dr Hausrath Waelzankermagnet
US4092620A (en) * 1976-03-22 1978-05-30 Leach Corporation Electrical connection for the moving contacts of a relay
DE2905686A1 (de) * 1978-02-27 1979-08-30 Iskra Miniatur-relais fuer kurze umschaltzeiten
DE2913106A1 (de) * 1978-04-17 1979-10-25 Int Standard Electric Corp Elektromagnetisches relais mit zwangsgefuehrten kontakten
DE3232679A1 (de) * 1981-09-04 1983-03-17 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches schaltrelais fuer hohe strombelastung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107403707A (zh) * 2017-08-25 2017-11-28 戴丁志 稳磁式接触器

Also Published As

Publication number Publication date
EP0178667A3 (fr) 1988-08-31
DE3438274A1 (de) 1986-04-24
DE3438274C2 (fr) 1987-06-19

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