EP0374552B1 - Procédé de fabrication d'un relais électromagnétique et relais ainsi obtenu - Google Patents

Procédé de fabrication d'un relais électromagnétique et relais ainsi obtenu Download PDF

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Publication number
EP0374552B1
EP0374552B1 EP89122261A EP89122261A EP0374552B1 EP 0374552 B1 EP0374552 B1 EP 0374552B1 EP 89122261 A EP89122261 A EP 89122261A EP 89122261 A EP89122261 A EP 89122261A EP 0374552 B1 EP0374552 B1 EP 0374552B1
Authority
EP
European Patent Office
Prior art keywords
yoke
wall
projection
core
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.)
Expired - Lifetime
Application number
EP89122261A
Other languages
German (de)
English (en)
Other versions
EP0374552A2 (fr
EP0374552A3 (fr
Inventor
Hans Peter Stribel
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.)
Stribel GmbH
Original Assignee
Stribel GmbH
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 Stribel GmbH filed Critical Stribel GmbH
Publication of EP0374552A2 publication Critical patent/EP0374552A2/fr
Publication of EP0374552A3 publication Critical patent/EP0374552A3/fr
Application granted granted Critical
Publication of EP0374552B1 publication Critical patent/EP0374552B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • 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
    • H01H2050/367—Methods for joining separate core and L-shaped yoke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49073—Electromagnet, transformer or inductor by assembling coil and core

Definitions

  • the invention relates to a method for producing an electromagnetic relay with the features of the preamble of claim 1.
  • the magnetic resistance in the magnetic circuit is as small as possible.
  • the magnetic resistance is often unsatisfactorily high since the connection between the yoke and the coil core is inadequate and is additionally subject to considerable temperature and vibration stresses during relay operation. It is also important that the pole face of the coil core and the abutment for the relay armature are precisely matched to each other in order to keep the magnetic resistance small at this point.
  • US-A-4749977 which describes the closest prior art, discloses a relay with a yoke and a coil core, which has a reduced-diameter attachment.
  • the yoke has a hole and a wall protrusion protruding on the inside, which also delimits the hole.
  • the coil core extension is inserted into the hole and axially displaced towards the wall projection by a certain amount, and only so far that an air gap remains between the coil core and the end face of the wall projection.
  • connection of a coil core with a yoke which has no wall projection.
  • a coil core extension which has a conical undercut, is inserted into a hole in the yoke wall and pressed in so far that the yoke material surrounding the coil core flows in the fastening area, for which a hard coil core material and large deformation forces are necessary during assembly.
  • US-A 4596972 discloses a relay with a coil core which does not have a reduced-diameter attachment but is essentially constant in diameter.
  • the coil core is inserted into a yoke wall hole, which is also delimited by a wall projection.
  • the object of the invention is to develop a method for producing a relay with the features of the preamble of claim 1 such that a magnetically low-resistance, fixed yoke-core connection is achieved by simple adjustment of the length of the core with little force with simple means.
  • the relay 1 can be installed on a printed circuit board 2, which can have conductor tracks (not shown here) on its lower and / or upper side.
  • the relay 1 has a yoke 3 made of a ferromagnetic material, which has a rear wall 4 and a leg 5 bent at right angles therefrom.
  • a core 7 is provided with a reduced diameter extension 6, which is also made of ferromagnetic material and with its axis 8 is parallel to the leg 5 at a distance.
  • the core 7 carries a coil body 9 made of insulating material, which has an end plate 10 and a back plate 11 and carries a coil 12 wound from coil wire.
  • the relay 1 On the underside of the relay 1 can be provided on the yoke wall 4 formed mounting pin 13 and to the normally closed contacts 14, working contacts 15 and coil connecting parts 16 plug pins 17 are provided, which are arranged at a distance from one another in accordance with a hole pattern formed in the printed circuit board 2 are and can be inserted into the holes in the circuit board 2.
  • an upwardly projecting pin 18 is formed, to which a helical tension spring 19 is fastened.
  • the other end of the coil spring 19 is fastened to a web 20, which also protrudes upward, of a hinged anchor 21 which is also made of ferromagnetic material.
  • the hinged anchor 21 is pivotally mounted on an abutment 22 formed on the yoke leg 5.
  • a metal braid 23 is attached to the yoke leg 3 and is contacted at its other end on the hinged armature 21.
  • a thin contact spring plate 24 is provided, which has one or more switching contacts 25 arranged between the normally closed contacts 14 and the working contacts 15.
  • a passage 26 is formed on the rear wall 4 of the yoke 3, which has a projection 28 protruding on the inside 27 of the yoke wall 4 and a recess 29 which is formed on the opposite outside 30 of the yoke wall 4.
  • the extension 6 of the core 7 can be inserted into the hole 31 determining the inside diameter of the passage 26, so that the core 7 comes to rest with a stop surface 32 on an annular surface 33 delimited by the outside diameter and the inside diameter of the projection 28.
  • the diameter of the core 7 and the outer diameter of the projection 28 are preferably approximately the same.
  • the diameter of the coil core extension 6 expediently the same or only slightly smaller than the diameter of the pull-through hole 31, so that the extension 6 can be inserted into the projection 28 largely without play during assembly.
  • the width of the circular ring surface 33 which is limited by the inner diameter and the outer diameter of the projection 28, so that it is approximately as wide as the thickness of the yoke wall 4.
  • the passage 26 formed in the yoke wall 4 is advantageously designed such that the dimension of the rear recess 29 and the length of the projection 28 projecting beyond the yoke wall inside 27 are approximately the same in the axial direction.
  • the dimension of the depression 29 within the yoke wall 4 and / or the length of the projection 28 projecting on the inside 27 in the axial direction such that it is approximately equal to or greater than half the thickness of the yoke wall 4.
  • the axial length of the extension 6 is slightly larger than the distance between the bottom of the recess 29 and the annular surface 33, so that the extension 6 protrudes into the recess 29 of the passage 26.
  • the stop surface 32 of the coil core 7 is pressed firmly against the annular surface 33 of the protruding wall projection 28, in such a way that the wall projection 28 is pressed back towards the plane of the yoke wall 4, so that the core stop surface 32 and the annular surface 33 are approximately in or slightly in front of the plane of the inside 27 of the yoke wall 4, as shown in FIG. 3 is shown in the final assembly position.
  • the projection 28 has preferably been pushed back so far that the core pole surface 34 lies in the same plane as the abutment 22.
  • the from FIG. 2 apparent distance 37 between the plane of the abutment 22 and the plane of the pole face 34 is in the preferred embodiment shown in FIG. 1 and 3 no longer, but has essentially been reduced to zero.
  • An advantage of the manufacturing method according to the invention and the relay manufactured according to it is that the core 7 can be connected extremely dimensionally and permanently firmly to the yoke wall 4, wherein there is also a large-area material connection in the connection area of the two parts, so that a small magnetic contact resistance high magnetic force flux is achieved.
  • the wall projection 28 is pressed back by means of the pressure force 38, the wall of the passage 26 is pressed firmly against the circumference of the core projection 6 by compression-like deformation, and at the same time the core stop surface 32 is pressed against the annular surface 33 of the projection 28, and form-fitting fixed connection is given, which is axially and radially non-positive in the passage 26 as well as on the inner and outer sides thereof.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Manufacture Of Motors, Generators (AREA)

Claims (3)

  1. Procédé de fabrication d'un relais électromagnétique, en particulier d'un relais à armature battante (1), avec une culasse ferromagnétique (3) et un noyau ferromagnétique de bobine (7), qui peut être fixé par un appendice (6) venant en prise dans une paroi de culasse (4), le noyau de la bobine (7) étant prolongé axialement jusqu'à une dimension donnée en direction d'une saillie de paroi (28), faisant saillie sur le côté intérieur (27) de la paroi de culasse,
    caractérisé en ce que
    la saillie de paroi (28), constituée sous la forme d'une traverse (26) en saillie sur le côté intérieur (27) de la paroi de la culasse, est refoulée en direction du plan de la paroi de la culasse (4),
    en ce que
    la paroi de la traverse (26) est comprimée fermement par une déformation analogue à un refoulement contre le pourtour de l'appendice (6) du noyau,
    en ce que
    l'on presse une face de butée du noyau (32) contre une surface circulaire (33) de la saillie de paroi (28) et
    en ce que
    l'appendice (6) du noyau pénètre dans un renfoncement (29) de la traverse (26), constitué sur le côté extérieur (30) de la paroi de la culasse opposé au côté intérieur (27) de la paroi de la culasse.
  2. Procédé selon la revendication précédente,
    caractérisé en ce que
    la saillie de la paroi (28) est refoulée jusqu'à ce que la surface de la butée (32) du noyau de la bobine (7) se trouve dans ou à peu près devant le plan du côté intérieur (27) de la paroi de la culasse.
  3. Procédé selon l'une des revendications précédentes,
    caractérisé en ce que
    l'extrémité libre de l'appendice du noyau (6) est ainsi rivetée sur le côté extérieur (30) de la paroi de la culasse de telle sorte qu'au moins une partie de la collerette du rivet (39) se trouve dans le renfoncement (29) de la traverse (26).
EP89122261A 1988-12-20 1989-12-02 Procédé de fabrication d'un relais électromagnétique et relais ainsi obtenu Expired - Lifetime EP0374552B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3842815 1988-12-20
DE3842815A DE3842815A1 (de) 1988-12-20 1988-12-20 Verfahren zur herstellung eines elektromagnetischen relais und danach hergestelltes relais

Publications (3)

Publication Number Publication Date
EP0374552A2 EP0374552A2 (fr) 1990-06-27
EP0374552A3 EP0374552A3 (fr) 1994-01-19
EP0374552B1 true EP0374552B1 (fr) 1997-06-18

Family

ID=6369588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89122261A Expired - Lifetime EP0374552B1 (fr) 1988-12-20 1989-12-02 Procédé de fabrication d'un relais électromagnétique et relais ainsi obtenu

Country Status (8)

Country Link
US (1) US5051716A (fr)
EP (1) EP0374552B1 (fr)
AT (1) ATE154723T1 (fr)
BR (1) BR8906577A (fr)
DE (3) DE3842815A1 (fr)
ES (1) ES2104559T3 (fr)
IE (1) IE80480B1 (fr)
PT (1) PT92632B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4436404A1 (de) * 1994-10-12 1996-04-18 Bosch Gmbh Robert Elektromagnetisches Relais und Verfahren zu dessen Herstellung
DE10304675B4 (de) * 2002-02-07 2009-08-20 Tyco Electronics Amp Gmbh Schaltrelais mit einer Magnetspule und Verfahren zum Herstellen eines Schaltrelais
ITPC20050005U1 (it) * 2005-03-10 2006-09-11 Electrica Srl Rele' voltmetrico con connettori rigidi atti a collegare il filo della bobina ai terminali faston
TWI680483B (zh) * 2019-07-03 2019-12-21 百容電子股份有限公司 電磁繼電器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1543930A (fr) * 1966-10-13 1968-10-31 Soprotekel Mode de fixation des noyaux magnétiques dans les relais ou pièces polaires
DE3150125C2 (de) * 1981-12-18 1988-05-05 Hermann Stribel KG, 7443 Frickenhausen Relais
DE3210031A1 (de) * 1982-03-19 1982-10-21 Alois Zettler Elektrotechnische Fabrik GmbH, 8000 München Joch-kern-verbindung an elektromagnetischen relais
US4720909A (en) * 1983-10-31 1988-01-26 Amf Inc. Method of manufacturing miniature power switching relays
US4596972A (en) * 1983-10-31 1986-06-24 Amf Incorporated Miniature power switching relays
US4749977A (en) * 1984-11-26 1988-06-07 United Technologies Corporation Coil mounting arrangement and its method of manufacture

Also Published As

Publication number Publication date
ES2104559T3 (es) 1997-10-16
EP0374552A2 (fr) 1990-06-27
US5051716A (en) 1991-09-24
ATE154723T1 (de) 1997-07-15
IE80480B1 (en) 1998-08-12
DE3842815A1 (de) 1990-06-21
PT92632A (pt) 1990-06-29
DE58909803D1 (de) 1997-07-24
DE3842815C2 (fr) 1990-12-20
DE8815777U1 (fr) 1990-04-26
EP0374552A3 (fr) 1994-01-19
PT92632B (pt) 1995-09-12
BR8906577A (pt) 1990-09-04

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