EP0321423A1 - Ein Zündschalter für Kraftfahrzeuge - Google Patents

Ein Zündschalter für Kraftfahrzeuge Download PDF

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Publication number
EP0321423A1
EP0321423A1 EP88830533A EP88830533A EP0321423A1 EP 0321423 A1 EP0321423 A1 EP 0321423A1 EP 88830533 A EP88830533 A EP 88830533A EP 88830533 A EP88830533 A EP 88830533A EP 0321423 A1 EP0321423 A1 EP 0321423A1
Authority
EP
European Patent Office
Prior art keywords
electrical contacts
ignition switch
casing
intermediate body
flat wall
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
EP88830533A
Other languages
English (en)
French (fr)
Other versions
EP0321423B1 (de
Inventor
Roberto Asero
Carlo Mauri
Ruggero Bertolani
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.)
Industrie Magneti Marelli SRL
Original Assignee
Industrie Magneti Marelli SRL
Magneti Marelli SpA
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 Industrie Magneti Marelli SRL, Magneti Marelli SpA filed Critical Industrie Magneti Marelli SRL
Publication of EP0321423A1 publication Critical patent/EP0321423A1/de
Application granted granted Critical
Publication of EP0321423B1 publication Critical patent/EP0321423B1/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
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/06—Key inserted and then turned to effect operation of the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H01H19/563—Angularly-movable actuating part carrying contacts, e.g. drum switch with an initial separation movement perpendicular to the switching movement

Definitions

  • the present invention relates to ignition switches for motor vehicles and particularly concerns switches comprising: - a containment casing with at least one generally flat wall, - a set of electrical contacts mounted on the flat wall, - at least one further electrical contact element mounted rotatably in the casing for cooperation with the electrical contacts of the set, and -a set of projecting formations which surround the electrical contacts of the set and can cooperate with the further contact element selectively to cause it to move towards and away from the electrical contacts of the set as a result of its rotation.
  • Ignition switches of the aforementioned type are known in the art.
  • the further rotatable contact element is supported (usually with the interposition of resilient elements such as springs) by a disc which is rotatably mounted within the casing and can be rotated by the ignition key of the motor vehicle through a transmission element.
  • the projecting formations (tripping formations) - the dimensions and shape of which determine the spatial sequence of connection of the various electrical contacts of the switch - are formed as appendages of the flat wall on which the electrical contacts are mounted.
  • This conventional solution makes the production of the casing (which in fact involves the production of a moulded component of fairly elaborate shape with problems of wastage of material, etc.) and the assembly of the ignition switch as a whole generally complex.
  • the object of the present invention is to produce a switch of the type specified above, in which the above problems are completely eliminated, providing further advantages as regards the ease and flexibility of production of the switch.
  • this object is achieved by virtue of an ignition switch of the type specified above, characterised in that an intermediate insulating body is provided which is interposed between the set of electrical contacts and the further contact element, and in that the formations are provided on the intermediate body.
  • the electrical contacts of the set are preferably mounted in a generally sandwich-like arrangement between the at least one flat wall of the casing and the intermediate body.
  • the latter is preferably fixed to the generally flat wall (by gluing or ultrasonic welding) and is provided with openings for the contact between the rotatable contact element and the electrical contacts of the set. If it is fixed by ultrasonic welding, it is envisaged that the surface of the intermediate body which is intended to face towards the flat wall of the casing is provided with projecting formations which are intended to be fused during the ultrasonic welding so as to produce a more intimate connection between the intermediate body itself and the flat wall of the casing.
  • an ignition switch for motor vehicles for example motor cars is generally indicated 1.
  • the switch 1 comprises: - a containment casing constituted by two half-shells 2, 3 having complementary shapes and provided with engagement formations for their snap-interconnection, -a set of electrical contacts 4 mounted within the casing jointly defined by the half-shells 2 and 3, in correspondence with a flat end wall 5 of the half-shell 2, -a rotatable disc-shaped element 6 which is fitted onto a pin 7 projecting from the end wall 5 of the half-shell 2 and is in turn provided with a further centring and guiding pin 8 rotatable within a hole 9 provided in the half-shell 3, and - a further electrical contact (plate) 10 which is provided with a central hole 11 for its rotatable mounting on the pin 7 and which is surrounded by a set of fingers projecting from the disc element so as to be drawn in rotation about the pin 7 as a result of the rotation imparted to the disc element 6.
  • the body 6 is rotated by the ignition key of the vehicle through a transmission element (not illustrated) which is intended to engage a shaped central cavity 13 of the pin 8 of the disc element 6 by form coupling.
  • Resilient elements are interposed between the disc element 6 and the rotatable contact 10, and have the function of thrusting the rotatable contact 10 towards the electrical contacts 4 situated on the flat end wall 5 of the half-shell 2.
  • An intermediate body of electrically insulating material, generally indicated 15, is mounted within the casing 2, 3 between the contacts 4 and the rotatable contact 10.
  • the body 15 whose structure and characteristics are shown in greater detail in Figures 2 to 4, is fitted to the wall 5 of the half-shell 2 (by gluing or by ultrasonic welding) so as to achieve a sandwich-like mounting of the contacts 4.
  • the intermediate body 15 is provided with a set of windows or apertures (openings) 16, 17 whose function is to enable the contact appendages 10a with which the plate 10 is provided to come into sliding contact with the contacts 4 which are sandwiched between the wall 5 and the body 15.
  • the contacts 4 extend along generally arcuate paths centred on the pin 7: the apertures or openings 16, 17 are of exactly the same shape.
  • the aperture or window 17 which is situated centrally of the element 15 usually comprises a central zone for passage of the pin 7, as well as an outer arcuate portion.
  • First projecting formations of the body 15, indicated 18, project from the face of the body which is intended to face towards the rotatable contact 10.
  • the formations 18 also extend along arcuate paths so as to border the windows 16 and 17 for respective portions of their angular development.
  • the projecting formations 18 are intended to cooperate with the rotatable element 10 to cause it to move away from the contacts 4 against the thrust exerted by the springs 14.
  • the dimensions and shape of the projecting formations 18 univocally determine the angular positions at which the rotatable contact 10 is moved away from the contacts 4 to interrupt the electrical contact therewith.
  • the contact 10 is usually mounted on the disc element 6 wth the interposition of at least three springs 14 so that, as well as a general movement towards and away from the contacts 4, the contact can also be inclined to the axis of rotation defined by the pin 7, whereby only some of its contact appendages 10a (and not all of these appendages) may be in sliding contact with the contacts 4.
  • the use of the further projecting formations 19 is envisaged when the intermediate body 15 is intended to be fitted to the end wall 5 of the body 2 by means of ultrasonic welding.
  • the projecting formations 19 are in fact intended to be fused under the action of the field of high-frequency vibrations generated by the sonotrode of the ultrasonic welding device.
  • the latter is moved along the opposite face of the body 15 in correspondence with the formations 19.
  • the material of these formations (which, like the formations 18, constitute integral appendages of the body 15 produced by the moulding of an insulating plastics material) is intended to constitute the weld material. It is thus possible to achieve a firm connection, whilst avoiding any dribbling towards the windows 16, 17 in which the contact appendages 10a must move.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Manufacture Of Switches (AREA)
EP88830533A 1987-12-17 1988-12-13 Ein Zündschalter für Kraftfahrzeuge Expired - Lifetime EP0321423B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6808587 1987-12-17
IT8768085A IT1211608B (it) 1987-12-17 1987-12-17 Commutatore di accensione per autoveicoli

Publications (2)

Publication Number Publication Date
EP0321423A1 true EP0321423A1 (de) 1989-06-21
EP0321423B1 EP0321423B1 (de) 1993-12-01

Family

ID=11307730

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88830533A Expired - Lifetime EP0321423B1 (de) 1987-12-17 1988-12-13 Ein Zündschalter für Kraftfahrzeuge

Country Status (6)

Country Link
EP (1) EP0321423B1 (de)
BR (1) BR8806760A (de)
DE (1) DE3886019T2 (de)
ES (1) ES2046328T3 (de)
IT (1) IT1211608B (de)
PL (1) PL160190B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998034253A1 (fr) * 1997-01-31 1998-08-06 Itt Composants Et Instruments Dispositif modulaire de commutation electrique
CN112002588A (zh) * 2020-08-31 2020-11-27 三实电器(漳州)有限公司 一种带壳体防重启机构开关及其使用方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1622706A (en) * 1926-01-27 1927-03-29 Harry A Douglas Combined lighting and ignition switch
DE941255C (de) * 1952-05-07 1956-04-05 Magneti Marelli Spa Schaltvorrichtung fuer Kraftfahrzeuge
DE3135866A1 (de) * 1981-09-10 1983-03-24 Franz Kirsten Elektrotechnische Spezialfabrik, 6530 Bingen Drehschalter
DE3150217A1 (de) * 1981-12-18 1983-06-30 Hartmann & Braun Ag, 6000 Frankfurt Drehschalter mit mehreren kontaktsaetzen, rastanordnung und rotorantrieb
DE3315994A1 (de) * 1982-05-27 1984-11-08 Günter 5277 Marienheide Merten Mehrfachschalter, insbesondere zuend-anlasserschalter fuer kraftfahrzeuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1622706A (en) * 1926-01-27 1927-03-29 Harry A Douglas Combined lighting and ignition switch
DE941255C (de) * 1952-05-07 1956-04-05 Magneti Marelli Spa Schaltvorrichtung fuer Kraftfahrzeuge
DE3135866A1 (de) * 1981-09-10 1983-03-24 Franz Kirsten Elektrotechnische Spezialfabrik, 6530 Bingen Drehschalter
DE3150217A1 (de) * 1981-12-18 1983-06-30 Hartmann & Braun Ag, 6000 Frankfurt Drehschalter mit mehreren kontaktsaetzen, rastanordnung und rotorantrieb
DE3315994A1 (de) * 1982-05-27 1984-11-08 Günter 5277 Marienheide Merten Mehrfachschalter, insbesondere zuend-anlasserschalter fuer kraftfahrzeuge

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998034253A1 (fr) * 1997-01-31 1998-08-06 Itt Composants Et Instruments Dispositif modulaire de commutation electrique
CN112002588A (zh) * 2020-08-31 2020-11-27 三实电器(漳州)有限公司 一种带壳体防重启机构开关及其使用方法

Also Published As

Publication number Publication date
BR8806760A (pt) 1989-08-29
IT1211608B (it) 1989-11-03
DE3886019D1 (de) 1994-01-13
PL160190B1 (pl) 1993-02-26
DE3886019T2 (de) 1994-06-30
ES2046328T3 (es) 1994-02-01
EP0321423B1 (de) 1993-12-01
PL276496A1 (en) 1989-08-07
IT8768085A0 (it) 1987-12-17

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