EP0572438B1 - Kontaktelement für ein leiterplattenrelais und verfahren zu dessen herstellung - Google Patents

Kontaktelement für ein leiterplattenrelais und verfahren zu dessen herstellung Download PDF

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Publication number
EP0572438B1
EP0572438B1 EP92903673A EP92903673A EP0572438B1 EP 0572438 B1 EP0572438 B1 EP 0572438B1 EP 92903673 A EP92903673 A EP 92903673A EP 92903673 A EP92903673 A EP 92903673A EP 0572438 B1 EP0572438 B1 EP 0572438B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact element
limbs
bent
stamped
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
EP92903673A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0572438A1 (de
Inventor
Horst Hendel
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP0572438A1 publication Critical patent/EP0572438A1/de
Application granted granted Critical
Publication of EP0572438B1 publication Critical patent/EP0572438B1/de
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
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • 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
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49204—Contact or terminal manufacturing

Definitions

  • the invention relates to a contact element for anchoring in a base body made of plastic for a relay, in particular a circuit board relay, this contact element being formed in one piece from a round wire as a rigid counter-contact element and forming a connecting pin with at least one end section.
  • This is specifically a contact element which is suitable for carrying large currents and is anchored in a base or a base plate or in a pocket of a coil former.
  • the invention also relates to a method for producing such a contact element.
  • Wire spring contacts are already known, for example from DE-A-21 02 651.
  • the wire springs used there have a relatively thin cross-section, and both the movable contact elements and the mating contact elements are designed as long springs, which means that they are proportionate between the contact point and the connecting pin result in high resistance, so that only low currents can be switched.
  • This also results from the fact that the round spring cross sections lying crosswise on top of each other in the contact area only result in a point contact, which in turn means a high contact resistance and precludes the switching of large currents.
  • a relay is also known from US Pat. No. 3,624,571, in which contact elements movably arranged in the base have a round cross section and are flat-stamped at their contacting ends. However, this measure is not sufficient for carrying large currents.
  • a contact element for a circuit board relay is to be created, which can be produced in the simplest way, with its connecting pins is adapted to the round circuit board bores and nevertheless enables large switching contact surfaces.
  • this object is achieved in that the contact element in the form of a hairpin is bent with two parallel legs, at least one of which serves as a connecting pin, that the two legs running parallel at a predetermined distance are bent in contact with one another in the region of curvature and that the region of curvature between the two Legs to a common contact zone with a flat surface are embossed flat and covered with a contact layer.
  • a rigid mating contact element is created here, so that both the wire cross section and the wire material can be selected in accordance with the currents to be switched. Copper or a copper alloy is preferably used as the material.
  • the contact elements With their round cross-section, the contact elements are not only well adapted to the holes in the printed circuit board, but they can also be fastened well in corresponding holes or round openings in the base body by a press fit. This prevents, for example, rosin or other contaminants from rising up into the contact space along the connection pins during the soldering process.
  • sharp-edged contact carriers when the round contact elements are plugged in there is no risk of abrasion and impairing the insulating distances. By appropriate embossing, the pin ends can also be made burr-free.
  • the two legs designed as connecting pins there is also a double conductor cross section for carrying high currents between the switching contact and the printed circuit board.
  • the two legs as connecting pins are arranged in a predetermined pitch, so that they can be inserted into two adjacent holes in the circuit board and can be electrically connected to one another on the circuit board or in another circuit part.
  • An advantageous method for producing a contact element according to the invention provides that the wire is first bent in a U-shape to form the two legs at a predetermined grid spacing and that the region of curvature is then embossed flat by means of an embossing device. Before the flat embossing, the two legs are bent in contact with one another in the region of the curvature. A contact piece is then expediently welded or brazed onto the contact zone.
  • the embossing device or the embossing stamps allows depressions or raised portions to be formed on the contact element. For example, warts for targeted welding or a guide groove can be stamped in as a plug-in aid. By limiting the embossing, dimensionally accurate fits can also be given to the contact element in length and / or width.
  • the flat stamping of the contact carrier also results in a space-saving arrangement when applying an additional contact piece, since the contact piece does not protrude beyond the diameter of the connecting pin on the recessed contact zone. Due to the size of the flat embossing, a total height compensation of the contact surface can be achieved processing contacts of different heights. The leakage current behavior between two round contact elements is also improved compared to flat elements.
  • the connecting pins can be provided with retaining lugs which, for. B. when embossing the contact carrier or trimming the pins.
  • the contact carriers can be manufactured almost without waste.
  • the wire is bent in a meandering shape to form a band of coherent, alternately opposing contact elements.
  • the individual contact elements are then obtained by separation along the central axis of this band.
  • the relay shown in Figure 1 has a conventional structure with a coil body 1 serving as the base body, which is shown without winding.
  • the magnet system of the relay is drawn schematically with a core 2, a yoke 3 and an armature 4.
  • a contact spring 5 is actuated as a center contact spring, which has a strand connection 6 which is only partially drawn.
  • two counter-contact elements 10 are anchored in corresponding openings, each of which is flat-stamped in its upper regions 8 and each provided with a welded-on contact piece 9. The more precise design and manufacture of these contact elements 10 will be explained in more detail with reference to the following figures.
  • a contact element 10 is shown, which is bent like a hairpin from a round wire.
  • the two legs 11 and 12 are formed with the round cross section of the wire in parallel as solder pins at a predetermined distance in accordance with a desired pitch.
  • this region of curvature is embossed flat and thus forms a contact zone 14 with flat surfaces, but less thick than the wire diameter.
  • the contours of the wire after the bending and before the flat stamping are indicated by the dashed lines 15, while the solid lines 16 represent the contours of the finished contact element.
  • a circular welding area 17 is embossed in the central area of the contact zone 14.
  • Holding legs 19 are also stamped on the legs 11 and 12, with which the tight fit of the contact element in the openings of the base body 1 is improved.
  • an end face 20 is stamped by appropriate design of the embossing tool, as a result of which the contact element is given a predetermined length dimension overall.
  • a guide groove 21 can be stamped into the rear of the contact zone as a plug-in aid.
  • the area of curvature of the contact element with the contact zone formed from it can either be designed symmetrically to the two legs 11 and 12, as shown in FIG. 2, or it can also be designed asymmetrically.
  • FIG. 3 shows one possibility for the latter design, the contact area being designed to be inclined at an angle of, for example, 45 ° to the longitudinal axis of the legs 11 and 12.
  • an end surface 20 embossed on the upper side but also a side end surface 22 is stamped on the right in the drawing, as a result of which the contact element assumes a predetermined fit both in length and in width.
  • FIG. 4 shows the shape of the contact element in an embossing tool.
  • This tool consists of an embossing receptacle 23 with an embossing recess 24 which defines the fit or the limits of the contact element and an embossing stamp 25 which is not shown in the top view of FIG.
  • the contact element 10 or the pre-bent wire 26 is inserted into the embossing receptacle 23 and then embossed into the corresponding shape with the embossing die 25, the contact tongue 14 in particular being embossed from the original contour 15 into the contour 16.
  • the embossed receptacle 23 has an elevation 27, in which a recess 28 is provided to form the welding region 17 mentioned. Before doing so, however, the area of curvature is embossed on contact by means of lateral embossing dies which are introduced in the direction of the arrows 29.
  • FIG. 5 shows a section of a continuous band 30 of contact elements 10, which are formed contiguously by meandering bending of a wire 26.
  • the individual contact elements 10 can, for example, in a composite tool successively shaped and provided with contact pieces. Only the finished contact elements 10 are then obtained by removing the middle pieces 31 along the central axis of the band 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacture Of Switches (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Contacts (AREA)
  • Emergency Protection Circuit Devices (AREA)
EP92903673A 1991-02-20 1992-02-05 Kontaktelement für ein leiterplattenrelais und verfahren zu dessen herstellung Expired - Lifetime EP0572438B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4105288 1991-02-20
DE4105288A DE4105288A1 (de) 1991-02-20 1991-02-20 Kontaktelement fuer ein leiterplattenrelais und verfahren zu dessen herstellung
PCT/DE1992/000073 WO1992015107A1 (de) 1991-02-20 1992-02-05 Kontaktelement für ein leiterplattenrelais und verfahren zu dessen herstellung

Publications (2)

Publication Number Publication Date
EP0572438A1 EP0572438A1 (de) 1993-12-08
EP0572438B1 true EP0572438B1 (de) 1994-11-30

Family

ID=6425489

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92903673A Expired - Lifetime EP0572438B1 (de) 1991-02-20 1992-02-05 Kontaktelement für ein leiterplattenrelais und verfahren zu dessen herstellung

Country Status (7)

Country Link
US (1) US5426272A (enrdf_load_stackoverflow)
EP (1) EP0572438B1 (enrdf_load_stackoverflow)
JP (1) JPH06505353A (enrdf_load_stackoverflow)
AT (1) ATE114868T1 (enrdf_load_stackoverflow)
CA (1) CA2104384A1 (enrdf_load_stackoverflow)
DE (2) DE4105288A1 (enrdf_load_stackoverflow)
WO (1) WO1992015107A1 (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101219515B (zh) * 2008-01-23 2012-05-30 浙江新光饰品股份有限公司 一种发夹的加工方法
CN110534369B (zh) * 2019-08-12 2025-02-11 兴机电器集团有限公司 一种触头组件的装配设备

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924684A (en) * 1955-03-11 1960-02-09 Claesson Per Harry Elias Contact device
DE1141717B (de) * 1958-02-17 1962-12-27 Wolfgang Gruner Kleinrelais mit Drahtfederkontakten
DE1819079U (de) * 1960-02-03 1960-10-06 Siemens Ag Kontaktanordnung fuer kleinstrelais.
US3210721A (en) * 1963-03-05 1965-10-05 Amp Inc Electrical connector
US3299239A (en) * 1965-01-25 1967-01-17 Texas Instruments Inc Rivet for welded electrical connections
JPS4919074B1 (enrdf_load_stackoverflow) * 1967-09-02 1974-05-15
US3624571A (en) * 1969-12-15 1971-11-30 Thermosen Inc Precision method and means for positioning contact points in miniature electrical relays
DE2102651A1 (de) * 1971-01-21 1972-08-03 Bach & Co Relais mit Drahtfeder-Kontaktsatz
US3918790A (en) * 1974-06-14 1975-11-11 Minnesota Mining & Mfg Snap spade electrical connector
US4082928A (en) * 1975-03-25 1978-04-04 Danfoss A/S Electic snap switch, particularly miniature switch
ES228864Y (es) * 1977-05-31 1977-12-01 Mejoras en el accionamiento de contactos de resorte para reles y similares.
DE2728182C3 (de) * 1977-06-23 1980-06-12 Elmeg Elektro-Mechanik Gmbh, 3150 Peine Stromzuführung zu Loskontakten eines Relais
FR2538963A1 (fr) * 1982-12-30 1984-07-06 Labinal Connecteur electrique
FR2561436B1 (fr) * 1984-03-14 1986-11-21 Telemecanique Electrique Relais electromagnetique polarise avec interrupteur a simple coupure
US4774763A (en) * 1986-08-27 1988-10-04 Methode Electronics, Inc. Electrical contact with compliant mounting section
DE3721286A1 (de) * 1987-06-27 1989-01-05 Zettler Elektrotechn Alois Kontaktfeder fuer relais
US4815200A (en) * 1987-11-30 1989-03-28 Yazaki Corporation Method for improving accuracy of connections to electrical terminal
JPH0770345B2 (ja) * 1990-06-28 1995-07-31 株式会社エーユーイー研究所 コネクタの製造方法およびコネクタ

Also Published As

Publication number Publication date
JPH06505353A (ja) 1994-06-16
EP0572438A1 (de) 1993-12-08
US5426272A (en) 1995-06-20
CA2104384A1 (en) 1992-08-21
ATE114868T1 (de) 1994-12-15
WO1992015107A1 (de) 1992-09-03
DE59200860D1 (de) 1995-01-12
DE4105288C2 (enrdf_load_stackoverflow) 1992-11-26
DE4105288A1 (de) 1992-08-27

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