EP0140284A1 - Relais électromagnétique et méthode pour sa fabrication - Google Patents

Relais électromagnétique et méthode pour sa fabrication Download PDF

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Publication number
EP0140284A1
EP0140284A1 EP84112526A EP84112526A EP0140284A1 EP 0140284 A1 EP0140284 A1 EP 0140284A1 EP 84112526 A EP84112526 A EP 84112526A EP 84112526 A EP84112526 A EP 84112526A EP 0140284 A1 EP0140284 A1 EP 0140284A1
Authority
EP
European Patent Office
Prior art keywords
coil
pole plates
coil body
relay
flange
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.)
Granted
Application number
EP84112526A
Other languages
German (de)
English (en)
Other versions
EP0140284B1 (fr
Inventor
Helmut Dipl.-Ing. Schedele
Josef Schweiger
Heinz Stadler
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.)
Siemens AG
Original Assignee
Siemens 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
Priority claimed from DE19833338208 external-priority patent/DE3338208A1/de
Priority claimed from DE19848411399 external-priority patent/DE8411399U1/de
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT84112526T priority Critical patent/ATE35748T1/de
Publication of EP0140284A1 publication Critical patent/EP0140284A1/fr
Application granted granted Critical
Publication of EP0140284B1 publication Critical patent/EP0140284B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
    • 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
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2236—Polarised relays comprising pivotable armature, pivoting at extremity or bending point of armature
    • H01H51/2245—Armature inside coil
    • H01H51/2254—Contact forms part of armature
    • 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
    • H01H9/02—Bases, casings, or covers
    • H01H2009/0285—Casings overmoulded over assembled switch or relay

Definitions

  • the invention relates to an electromagnetic relay with a tongue-shaped armature arranged in an axially continuous opening of a coil body, which is fastened with a fastening end in the region of a first coil flange and with its free end in the region of the second coil flange can be switched between two pole plates, the fastening end of the An anchor is formed on the flow transition plate lying flat on the end face of the first coil flange, the pole plates also resting flatly on at least one section on the end face of the second coil flange and abutting two spacers of the coil flange arranged in the extension of the narrow sides of the armature, and both on the end faces a sealing film is arranged for each of the first and the second coil flange.
  • the invention also relates to a method for producing such a relay.
  • a relay of the type mentioned above is known from DE-AS 27 23 220.
  • the construction is chosen so that a good magnetic coupling is possible on the end faces of the coil body, namely on one end a coupling of the pole plates to a flat permanent magnet and on the other end a coupling of the flux transition plate to a ferromagnetic housing cap.
  • the contact space with a sealing film on both ends of the coil body largely complete, so that even when the relay is later embedded in casting resin, the thin potting compound cannot penetrate into the interior of the coil body.
  • the object of the invention is to make the relay of the type mentioned above more simple to manufacture by simple design of the individual parts and in particular to improve and facilitate the preliminary sealing with the sealing film on both end faces of the coil former, but at the same time also with a simple design of the parts, a good conclusion of to ensure permanent magnetic circuit such as the excitation circuit.
  • this object is achieved in a relay of the type mentioned in that an edge bead surrounds the coil body opening on the first coil flange, which is only penetrated on two opposite sides by two retaining webs of the armature corresponding to the height of the bead, that the spacers on the second coil flange protrude a height corresponding to the thickness of the pole plates over the end face of the coil flange and that the pole plates are positioned between the spacers and holding tabs provided on the edge of the coil flange.
  • the gaps formed between the pole plates on the one hand and the spacers on the other are angled like a labyrinth. This ensures that when the relay is potted between the sealing film and the coil body, the resin that penetrates must travel as long as possible to the contact space and thereby come to a standstill.
  • the pole plates themselves are expediently cranked in the area between the spacers toward the armature. This creates a sufficient distance between the sealing film and the switching point; in addition, there is an expansion of the capillary gap between the pole plates and the sealing film towards the contact space, whereby the casting resin, if it penetrates so far at all, comes to a standstill.
  • pole plates are expediently symmetrical with respect to the coil axis, if one disregards the connecting pins which are guided downwards in parallel. It is possible to have only one form of pole plates with molded on both sides Manufacture connecting pins and either cut off one of the connecting pins before installation.
  • the armature is cut free at its fastening end with respect to the film, it only having two lugs lying flush in the edge bead of the coil body.
  • the mobility of the armature when switching is not impeded by a glued-on sealing film, and it also prevents casting compound from flowing there and additionally influences the spring constant of the armature (capillary lock).
  • the desired good sealing is achieved by the lugs in the edge bead.
  • the relay is polarized with a flat, four-pole permanent magnet arranged on the pole plates, a frame-shaped yoke enclosing the entire relay.
  • This yoke can consist of two identical sheet metal brackets rotated by 180 ° relative to one another and overlapping one another in the winding area. However, it can also be designed as a one-piece frame which is deformed in the region of the coil winding to compensate for tolerances.
  • the yoke arrangement is formed from two U-shaped sheet metal brackets which are attached in opposite directions to the relay, the central sections of which run axially parallel on both sides of the coil and the end legs of which are in pairs in front of the two end faces of the relay in a common plane, the matched to one another Surfaces of the abutting end legs of both sheet metal brackets together cover essentially the entire end face of the relay. This ensures that each of the two sheet metal brackets has a continuous flow from the permanent magnet to the flow transition sheet at the opposite relay end path for the permanent magnetic flux, but also for the control flow, which flow path is not interrupted by any air gaps. Both sheet metal brackets can be designed essentially identically and can be attached to the relay by rotating them through 180 °.
  • the end legs each having approximately half the width relative to the central section of the sheet metal bracket, are formed on one side of the central section in the lower region and on the other side of the central section in the upper region.
  • a different design of the end legs would also be conceivable. It is only important that the end legs of the two sheet metal brackets, which meet on one relay end face, are coordinated in such a way that they do not overlap, but instead cover the entire end face of the relay lying in a common plane in order to allow as little leakage flux to escape.
  • the relay including the yoke is expediently embedded on all sides in a casting compound which is penetrated only by the connecting pins and spacer knobs arranged on all sides. These knobs are used to ensure uniform encapsulation with potting compound when the relay is potted in a mold. On the connection side of the relay, they also form spacing lugs for installation on printed circuit boards.
  • the relay shown in FIGS. 1 to 6 has a coil body 1 with a winding 2, an axial cavity 3 and end-side coil flanges 4 and 5.
  • a tongue-shaped armature 6 is fastened with a fastening end 6a in the area of the coil flange 4 via lateral tabs 7, while the free end 6b of the armature can be switched between two pole plates 8 and 8 'in the region of the coil flange 5.
  • These two pole plates 8 and 8 ' lie essentially flat on the end face of the coil body and, with the interposition of a sealing film 9, form a contact surface for a flat, four-pole permanent magnet 10.
  • a connecting pin 8a or 8a ' are examples of armature
  • the contacting ends 8b and 8b ' are cranked into the coil body in order to form contact surfaces there as well as pole surfaces for the armature end 6b.
  • the working air gaps are shifted somewhat away from the permanent magnet, so that the duration magnetic poles are better separated.
  • an adverse effect of length tolerances of the armature is avoided, and sparks that occur during switching cannot damage the film.
  • the cranked pole plates 8 and 8 'protrude contactlessly on the contact side (8b, 8b') into the coil body opening 3a, as a result of which no capillary gaps can form, and therefore no casting resin can penetrate to the contact surfaces.
  • the armature 6 continues to form a flow transition plate 11 on the coil flange 4, which lies flat on the end face of the coil flange 5.
  • a sealing film 12 is placed over this flow guide plate 11, which, like the sealing film 9, can be designed as a composite film and is fastened, for example, to the end face of the coil body by means of a warm stamp.
  • the entire relay is embedded in potting compound 25.
  • the fully assembled relay including permanent magnet and yoke is placed in a mold, into which the sealing compound is then filled.
  • the coil body has spacing knobs 14 projecting on all sides. In the area of the connection side, these spacer knobs also merge into spacer lugs 15, which are not completely embedded in potting compound which and in a manner known per se serve to ensure a distance for removing solder fumes when the relay is soldered onto printed circuit boards.
  • the coil former 1 is shown in a perspective view of the coil flange 4 together with the specially adapted armature 6.
  • the armature is fastened, for example glued, in the grooves 4a of the coil body flange 4 with the fastening tabs 7 already mentioned.
  • the flux transition plate 11 formed on the armature lies in an end-side recess 16 of the coil former flange, the depth of which is somewhat greater than the thickness of the flow transition plate 11.
  • a bead 17 is formed on the coil flange, which on one side in a recess 11a of the river transition plate is located and continues on the other side of the bobbin opening 3, thereby also enclosing a getter space 18 in the same plane for receiving a columnar getter tablet 19.
  • the getter space 18 has a holding web 18a which is adapted to the contour of the columnar getter 19 at the top and bottom. The getter 19 is thus fixed at the ends while its middle part is exposed, so that the air from the coil interior connected to the getter space 18 reaches the getter surface unhindered.
  • FIG. 6 shows a perspective view of the other side of the coil former 1 with the coil flange 5, on which the pole plates 8 and 8 'are placed.
  • the coil former flange 5 has mutually opposite, T-shaped spacers 23, against which the pole plates 8 and 8 'each lie laterally, as a result of which the contact distance or the working air gap between the two pole plates is defined. With the cross pieces 23a, these spacers 23 engage with cutouts 8c and 8c 'of the pole plates 8 and 8', so that there is a labyrinthine course of the gap formed between the two parts. This makes it difficult for the casting compound to flow into the inside of the coil body.
  • retaining lugs 24 are formed, on which the pole sheets 8 and 8 'are supported in cutouts 8d and 8d'. With this support, the pole plates 8 and 8 'are pressed against the spacers 23, ribs 8e and 8e' ensuring tolerance compensation.
  • the height of the spacers 23 corresponds exactly to the thickness of the pole plates 8 and 8 ', expediently the height of the retaining lugs 24 also corresponds to this thickness. This also results in a flat contact surface for the sealing film 9 surrounding the coil body opening in the area of the coil flange 5.
  • the two pole plates 8 and 8 ' can initially be completely identical in the strip. So only a pole plate 8 with two connecting pins 8a and 8a 'is punched out and bent. Then, depending on the installation position, either the connecting pin 8a '(for the pole plate 8) or the connecting pin 8a (for the pole plate 8') is cut off from the strip. The two identically designed pole plates are then installed rotated by 180 ° against each other.
  • the individual identical pole sheets 8 and 8 ' are punched and formed on a sheet metal strip 25 with only one connecting pin 8a or 8a' between them.
  • the strip is then either cut through at the separating points 26 in order to obtain pole plates 8 with connecting pins 8a, or the strip is cut through at the separating points 27 in order to obtain pole plates 8 'with connecting pins 8a'.
  • a modified relay is shown in four sectional views, which has the same advantages as the previously described embodiment. Only the switching axis of the armature is rotated compared to the previously described embodiment, it is now horizontal.
  • the structure of the relay is otherwise comparable. It has a coil former 31 ' with a winding 32, an interior 33 and two flanges 34 and 35.
  • An armature 36 is arranged inside, which is fastened on one side to the coil flange 34 by means of fastening tabs 37 and with its free end between two pole plates 38 or 38 'is switchable.
  • a sealing film 39 lies on the pole plates 38 and 38 ', on which a four-pole permanent magnet 40 is arranged.
  • the armature forms two laterally formed flow transition plates 41.
  • This end face is one Sealing film 42 completed, and a yoke 43 is provided to close the magnetic circuits.
  • the yoke is designed as a U-shaped bracket, which rests with its central part against the permanent magnet 40 and with its two ends against the flow transition plates 41.
  • a circumferential bead 47 is provided, which surrounds the coil body opening 33 including a getter space 48 for receiving a getter 49 and has only two recesses 50, in which retaining webs 51 of the armature lie. These holding webs close off at the end with the surface of the bead 47, so that a flat contact surface for the sealing film 42 is formed.
  • pole plates 38 and 38 ' are also adapted to the horizontal position of the armature 36.
  • the rest of the design corresponds to the previous embodiment.
  • the height of the spacers 53 and also the retaining lugs 54 corresponds to the thickness of the pole plates 38 and 38 ', respectively, so that here too a flat contact surface for the sealing film 39 is created. In a comparable way, this relay is finally embedded in cast resin.
  • the relay shown in FIGS. 12 and 13 is constructed essentially as the relay according to FIGS. 1 to 10.
  • a yoke arrangement is provided, which is formed by two U-shaped sheet metal brackets 61 and 62 made of ferromagnetic material.
  • the two tin offices gel 61 and 62 are identical and rotated against each other by 180 ° so that they can be pushed from both sides over the relay.
  • a middle part 61a or 62a covers a longitudinal side of the relay next to the coil winding, while the end legs 61b, 61c as well as 62b and 62c lie on top of one another in pairs on the end faces of the relay.
  • the end legs 61b and 62c lie one above the other in front of the coil flange 5 and cover the entire end face of the permanent magnet 10, while at the other end of the relay, the end legs 61c and 62b cover the end face on the coil flange 4 in one plane.
  • Each of the two sheet metal brackets 61 and 62 thus forms a closed flow path without an air gap between the permanent magnet 10 and the flow transition sheet 11, which results in a good flux of the magnetic circuit.
  • sheet metal brackets 61 and 62 are very simple, since they can easily be punched on the strip. Assembly is also easy; The end legs are rounded off to make installation easier. These end legs are also slightly biased inwards so that they have to be bent up slightly for assembly and then apply their pretension to the two end faces of the relay. The relay can then be cast with the attached sheet metal brackets 61 and 62 in an additional protective cap or without a protective cap in a mold.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electromagnets (AREA)
EP84112526A 1983-10-20 1984-10-17 Relais électromagnétique et méthode pour sa fabrication Expired EP0140284B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84112526T ATE35748T1 (de) 1983-10-20 1984-10-17 Elekromagnetisches relais und verfahren zu dessen herstellung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3338208 1983-10-20
DE19833338208 DE3338208A1 (de) 1983-10-20 1983-10-20 Elektromagnetisches relais und verfahren zu dessen herstellung
DE8411399U 1984-04-11
DE19848411399 DE8411399U1 (de) 1984-04-11 1984-04-11 Elektromagnetisches Relais

Publications (2)

Publication Number Publication Date
EP0140284A1 true EP0140284A1 (fr) 1985-05-08
EP0140284B1 EP0140284B1 (fr) 1988-07-13

Family

ID=25815017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112526A Expired EP0140284B1 (fr) 1983-10-20 1984-10-17 Relais électromagnétique et méthode pour sa fabrication

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EP (1) EP0140284B1 (fr)
DE (1) DE3472732D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167238A (en) * 1984-11-13 1986-05-21 Tocksfors Verkstads Ab Electromagnetic relay armature
EP0198492A2 (fr) * 1985-04-19 1986-10-22 Siemens Aktiengesellschaft Relais électromagnétique polarisé
DE3620942A1 (de) * 1986-06-23 1988-01-07 Siemens Ag Elektromagnetisches relais
EP0334336A1 (fr) * 1988-03-25 1989-09-27 Siemens Aktiengesellschaft Relais électromagnétique polarisé à contacts multiples

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2766036C (fr) * 2009-06-23 2016-03-29 Panasonic Electric Works Co., Ltd. Relais electromagnetique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386125A1 (fr) * 1977-03-30 1978-10-27 Int Standard Electric Corp Relais electromagnetique
FR2392486A1 (fr) * 1977-05-23 1978-12-22 Siemens Ag Relais electromagnetique, miniature, polarise

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386125A1 (fr) * 1977-03-30 1978-10-27 Int Standard Electric Corp Relais electromagnetique
FR2392486A1 (fr) * 1977-05-23 1978-12-22 Siemens Ag Relais electromagnetique, miniature, polarise

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167238A (en) * 1984-11-13 1986-05-21 Tocksfors Verkstads Ab Electromagnetic relay armature
EP0198492A2 (fr) * 1985-04-19 1986-10-22 Siemens Aktiengesellschaft Relais électromagnétique polarisé
EP0198492A3 (en) * 1985-04-19 1989-03-15 Siemens Aktiengesellschaft Berlin Und Munchen Polarised electromagnetic relay
DE3620942A1 (de) * 1986-06-23 1988-01-07 Siemens Ag Elektromagnetisches relais
EP0334336A1 (fr) * 1988-03-25 1989-09-27 Siemens Aktiengesellschaft Relais électromagnétique polarisé à contacts multiples

Also Published As

Publication number Publication date
DE3472732D1 (en) 1988-08-18
EP0140284B1 (fr) 1988-07-13

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