EP0531222A1 - Verfahren zur Herstellung eines kontakttragenden Blattes eines Schalters durch Herausschneiden in eines Bandes und nach diesem Verfahren hergestelltes Blatt - Google Patents

Verfahren zur Herstellung eines kontakttragenden Blattes eines Schalters durch Herausschneiden in eines Bandes und nach diesem Verfahren hergestelltes Blatt Download PDF

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Publication number
EP0531222A1
EP0531222A1 EP92402422A EP92402422A EP0531222A1 EP 0531222 A1 EP0531222 A1 EP 0531222A1 EP 92402422 A EP92402422 A EP 92402422A EP 92402422 A EP92402422 A EP 92402422A EP 0531222 A1 EP0531222 A1 EP 0531222A1
Authority
EP
European Patent Office
Prior art keywords
blade
tongues
switch
cutting
joint
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
EP92402422A
Other languages
English (en)
French (fr)
Other versions
EP0531222B1 (de
Inventor
Henri Dumonteil
Christian Roux
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.)
Crouzet Automatismes SAS
Original Assignee
Thales Avionics SAS
Crouzet Automatismes SAS
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 Thales Avionics SAS, Crouzet Automatismes SAS filed Critical Thales Avionics SAS
Publication of EP0531222A1 publication Critical patent/EP0531222A1/de
Application granted granted Critical
Publication of EP0531222B1 publication Critical patent/EP0531222B1/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
    • H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs

Definitions

  • the present invention relates, originally, to a contact-carrying blade of a switch with two output terminals and an input terminal, or common, and comprising a pusher for pushing one of the ends of the blade and thus move its other contact-carrying end from one of the output terminals to the other, to finally switch the common of one of the output terminals to the other.
  • the blade provides the electrical connection between the common and one or the other of the output terminals, on the one hand, and the blade is pivotally mounted on a joint integral with the common, on the other hand.
  • the contact-carrying blade 1 is mounted on the articulation 2 by two central tongues 3, 4 engaged by their free ends 5, 6 in two opposite notches 7, 8 of the articulation 2, the tongues 3, 4 being connected, respectively, to the end 9 of cooperation with the pusher and to the contact carrier end 10 which are joined together by a pair of lateral arms 11 between which extend with play the tabs 3, 4.
  • the arming force of the blade on the joint generated by the elastic buckling of one of the two tongues slightly spaced from the other, not being sufficient for this, the common and the central tabs of the blade are coated with a layer of a noble metal, for example gold or silver.
  • the contact-carrying blade of the switch is produced by cutting with a press, or shearing, from a ribbon, then by dipping the coating metal in an electrolytic bath.
  • the central tongues are coated with a layer of noble metal on their five free faces, that is to say their four longitudinal faces parallel in pairs and their edge, or transverse face d 'end.
  • a layer of noble metal on their five free faces, that is to say their four longitudinal faces parallel in pairs and their edge, or transverse face d 'end.
  • the blades have a very small thickness, of the order of a hundred microns, and that, in the soaking tank, they can consequently deform and stick to each other, to prevent it from n 'results in an irregular metallization and therefore insufficient in some places, it is still preferred that the deposit of noble metal, in the electrolytic bath, is everywhere superabundant, which strikes the realization of the blade, and therefore of the switch, fresh additional.
  • the present invention aims to overcome all these drawbacks and is based on a double finding in itself already inventive.
  • the noble metals of the coatings of electrical connection between the common and the central tongues have a good ductility and the anchoring of the free ends of the tongues in the notches of the joint, during the use of the switch and because of this ductility and of the pivoting of the tongue ends, is accentuated but so as not to exceed a ultimately relatively shallow depth on either side of the transverse edge of pivoting of the tongue ends.
  • the depth of anchoring of the tongues in the joint, when the switch is new is about 1 ⁇ m and, after use, it does not exceed 5 ⁇ m on average.
  • the present invention therefore relates to a process for producing, by cutting from a ribbon, a contact-carrying blade of a switch arranged to electrically connect an input terminal to one or the other of two output terminals of the switch and comprising two tongues which, by their free ends, joined before cutting, are pivotally mounted on a joint integral with the input terminal, the electrical connection between the joint and the tongues being provided by coatings of a ductile metal, process characterized by the fact that the blade is cut from the strip which has previously been coated with a layer of metal.
  • the edge of the pivoting end of a tongue is coated with the electrical bonding metal, which is ductile in nature, by stretching and transfer, to a perfectly perfect depth. sufficient, of part of the surface covering of the tape adjacent to the cut edge of the tongue. From the cut blade, it can be mounted on the joint before the other stages of the switch manufacturing process are continued.
  • the ribbon is sheared between a fixed die, at an edge and a cutting face, on which rests a part of the ribbon intended to become one of the two tongues, and a movable punch which is moved parallel to the cutting face of the die.
  • the present invention also relates to the switch contact-holder blade, produced according to the method of the invention, comprising two tongues with free ends, arranged to be pivotally mounted on an articulation of the switch and carrying a coating of ductile metal of electrical connection with the joint, on the surface and on the edge of their free end, characterized in that the coating of the edge of the tongues extends only in part thereon.
  • the blade has been cut, and we will come back to this later, in a coated ribbon, on its two faces, corresponding to those mentioned above and carrying the studs 13, 14, of two layers of ductile conductive metal 20, 21.
  • L the joint 2 is also coated with a layer of ductile conductive metal 22.
  • the layers of metal 20-22 provide the good electrical connection between the joint 2 and the tongues 3, 4.
  • the edges 23, 24, that is ie the transverse end faces of the tongues 3, 4 also have a metal coating 27, 25 but which only extends part on these edges, from their transverse edge 28, 26 of pivoting in the notches 7, 8.
  • silver which is an excellent conductor, can be used for large currents, and gold, which has good corrosion resistance, for low currents.
  • the blade was cut from a CuBeyll cuBeyll ribbon 14 mm wide and 100 ⁇ m thick coated on both sides with a layer of silver Ag 0.3 ⁇ m thick.
  • the joint made of CuZn brass, was coated with a silver layer 3 to 5 ⁇ m thick, here particularly thin.
  • the silver layer, on the edge of the tongues, extends substantially over a thickness of 20 ⁇ m, more than enough to ensure good contact Ag on Ag during pivoting of the end 6 of the tongue 4, of approximately 2 degrees.
  • the cutting of a contact-carrying blade of the invention is carried out by means of a fixed matrix, composed of several elements corresponding to the different parts of the blade, and of a series of associated movable punches. This cutting is carried out in a perfectly conventional manner; as regards the free ends of the tongues, assembled before cutting, a metal transfer is carried out along the pivoting edge of the tongues.
  • a die element 29 is used, with support face 37, cutting face 31, perpendicular to the face 37, and cutting edge 30, and a punch 32.
  • the punch 32 is mounted to be moved parallel to the cutting face 31 of the die 29, in the direction of the arrow 36.
  • the punch 32 has a cutting edge 33 and a cutting face 34 parallel to the direction of movement 36.
  • the face front 35 of the punch is, conventionally, released from the plane perpendicular to the direction of movement 36 passing through the cutting edge 33.
  • the ribbon is cut to form the two free ends 5, 6, the free end 5, with a edge 23, and the free end 6, with a edge 24 formed by the cutting edge 30 and the face 31 of the die 29.
  • the first transverse edge 28 of the free end 5 of the tongue 3, intended to become the pivoting edge, is rounded convexly by the punch with stretching and transfer of part 27 of the metal of the layer 20 on the wafer 23.
  • the second edge created in the vicinity of the cutting edge 30 of the die, it is also rounded but concave, with point drawing of part of the metal of the layer 21.
  • the first transverse edge 26, intended to become the he pivoting edge is convexly rounded with stretching and transfer of part 25 of the metal of layer 21 onto the edge 24.
  • the edge 28 of the tongue 3 is much less important than the edge 26 of the tongue 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacture Of Switches (AREA)
EP92402422A 1991-09-05 1992-09-04 Verfahren zur Herstellung eines kontakttragenden Blattes eines Schalters durch Herausschneiden in eines Bandes und nach diesem Verfahren hergestelltes Blatt Expired - Lifetime EP0531222B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110992 1991-09-05
FR9110992A FR2681184B1 (fr) 1991-09-05 1991-09-05 Procede de realisation, par decoupe dans un ruban, d'une lame porte-contacts d'interrupteur et lame realisee selon le procede.

Publications (2)

Publication Number Publication Date
EP0531222A1 true EP0531222A1 (de) 1993-03-10
EP0531222B1 EP0531222B1 (de) 1996-12-18

Family

ID=9416667

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402422A Expired - Lifetime EP0531222B1 (de) 1991-09-05 1992-09-04 Verfahren zur Herstellung eines kontakttragenden Blattes eines Schalters durch Herausschneiden in eines Bandes und nach diesem Verfahren hergestelltes Blatt

Country Status (4)

Country Link
EP (1) EP0531222B1 (de)
DE (1) DE69216012T2 (de)
FR (1) FR2681184B1 (de)
HK (1) HK1000224A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0614203A1 (de) * 1993-03-05 1994-09-07 CROUZET Automatismes Gelenk für die Blattfeder eines Mikroschalters
CN111525260A (zh) * 2020-04-22 2020-08-11 深圳市广和通无线股份有限公司 天线装置
CN113035614A (zh) * 2021-03-12 2021-06-25 宁波华科汽车零部件有限公司 一种用于组合开关的动触片裁切机构及其使用方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1390344A (fr) * 1964-01-14 1965-02-26 Procédé d'obtention de plots pour contacteurs
GB2088133A (en) * 1980-11-03 1982-06-03 Crouzet Sa Snap-action Switch
EP0395810A2 (de) * 1989-05-05 1990-11-07 Alco Electronic Products, Inc. Schnappschalter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1390344A (fr) * 1964-01-14 1965-02-26 Procédé d'obtention de plots pour contacteurs
GB2088133A (en) * 1980-11-03 1982-06-03 Crouzet Sa Snap-action Switch
EP0395810A2 (de) * 1989-05-05 1990-11-07 Alco Electronic Products, Inc. Schnappschalter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN vol. 18, no. 10, Mars 1976, NEW YORK pages 3405 - 3406 W. M. DAVIS 'wafer switch' *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0614203A1 (de) * 1993-03-05 1994-09-07 CROUZET Automatismes Gelenk für die Blattfeder eines Mikroschalters
CN111525260A (zh) * 2020-04-22 2020-08-11 深圳市广和通无线股份有限公司 天线装置
CN111525260B (zh) * 2020-04-22 2021-10-08 深圳市广和通无线股份有限公司 天线装置
CN113035614A (zh) * 2021-03-12 2021-06-25 宁波华科汽车零部件有限公司 一种用于组合开关的动触片裁切机构及其使用方法
CN113035614B (zh) * 2021-03-12 2022-09-13 宁波华科汽车零部件有限公司 一种用于组合开关的动触片裁切机构及其使用方法

Also Published As

Publication number Publication date
FR2681184A1 (fr) 1993-03-12
EP0531222B1 (de) 1996-12-18
DE69216012T2 (de) 1997-06-12
FR2681184B1 (fr) 1995-03-31
DE69216012D1 (de) 1997-01-30
HK1000224A1 (en) 1998-02-06

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