EP0644568B1 - Sicherheitsschalter - Google Patents

Sicherheitsschalter Download PDF

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Publication number
EP0644568B1
EP0644568B1 EP94114007A EP94114007A EP0644568B1 EP 0644568 B1 EP0644568 B1 EP 0644568B1 EP 94114007 A EP94114007 A EP 94114007A EP 94114007 A EP94114007 A EP 94114007A EP 0644568 B1 EP0644568 B1 EP 0644568B1
Authority
EP
European Patent Office
Prior art keywords
mass
spherical
safety switch
contact
convex
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
EP94114007A
Other languages
English (en)
French (fr)
Other versions
EP0644568A1 (de
Inventor
Giovanni Penna
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.)
Kostal Italia SRL
Original Assignee
Kostal Italia SRL
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 Kostal Italia SRL filed Critical Kostal Italia SRL
Publication of EP0644568A1 publication Critical patent/EP0644568A1/de
Application granted granted Critical
Publication of EP0644568B1 publication Critical patent/EP0644568B1/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
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch

Definitions

  • the present invention relates to a safety switch of the normally closed kind for vehicle engines, and more particularly pertains to a safety switch inserted in the fuel pump electric circuit.
  • the function of the switch is to open responsive to acceleration or deceleration exceeding a predetermined intensity to which the vehicle is subjected in a horizontal plane.
  • the switch must not be responsive to jerks or vibration of normal intensity.
  • Switches of this kind are well known, for example those disclosed in US-A-2206067 and EP-A-0038328. These devices have a drawback in that they are rather complex and costly from a constructional point of view. Some of them are also rather difficult to reset in their original position after they have been activated.
  • FR-A-2 620 855 discloses a safety switch inserted in an electric circuit of a vehicle.
  • the switch comprises:
  • the present invention seeks to provide an improved safety switch capable of overcoming the above problem.
  • the safety switch comprises a fixed housing 1, preferably made of plastic material, consisting of a bottom portion 53 and a downwardly tapered side wall portion 43 on top of which a cap 40 is fitted.
  • the cap 40 forms a cylindrical portion 43 extending upwardly from a base 42, in the centre of which a central dead hole 44 and four openings 45 (of which only two are visible in the drawing) are obtained.
  • a push button 46 is slidably accommodated in the upper part of the cap 40.
  • the push-button 46 rests on the base of the cap by means of a returning spring 47.
  • the openings 45 let through four projections 48 (of which only two are visible in the drawing of figure 1) that are integral with the push-button 46 and have lower outwardly diverging inclined surfaces 49.
  • An inner cup 50 consisting of a bottom portion 51 and a cylindrical wall 52, is fixed between the frustoconical portion 43 of the lower body 1 and the base 42 of the cap 40.
  • the bottom 51 of the cup 50 provides a central bore for accommodating a floating pin 54 that is interposed between the spherical mass 22 and the contact in form of elastic lamina 11.
  • This lamina is fixed in bottom portion 53 of the body 1 and is movable between a lower fixed contact 12 of normally closed kind and an upper contact 13 of normally open kind fixed to the bottom portion 53.
  • the elastic lamina 11 and the floating pin 54 are biased upwardly by means of a spring 30 resting on the bottom portion 53 of lower body 1.
  • the lower body 1 also forms a watertight connector 55 for electric connection to the fixed contact 13.
  • the top of the switch is covered by a gasket 56 that renders the inner parts of the switch watertight.
  • the safety switch may also be utilised for other devices, providing the same advantages.
  • the contact 13 is closed so that a warning light (not shown) located in the passenger cabin is lit up to indicate the operation of the switch.
  • FIG. 2 differs from that of Figure 1 in that the floating pin 54 is arranged having an upper narrow shaft portion 54a and a lower downwardly open larger cup portion 54b.
  • Floating pin 54 is no longer interposed between the spherical mass 22 and the elastic lamina 11, (as shown in Figure 1), as shaft portion 54a is inserted in a corresponding bore obtained in the elastic lamina 11.
  • Bottom spring 30 is fitted within cup portion 54b and urges the upper end of shaft portion 54a directly against mass 22.
  • Lamina 11 is arranged so as to normally close upon lower fixed contact 12 ( Figure 2).

Landscapes

  • Switches Operated By Changes In Physical Conditions (AREA)
  • Control Of Combustion (AREA)
  • Air Bags (AREA)

Claims (5)

  1. Sicherheitsschalter, der in einen elektrischen Stromkreis eines Fahrzeugs eingefügt ist, wobei der Schalter umfaßt:
    ein Gehäuse (1) fix mit dem Fahrzeug verbunden;
    eine kugelförmige Trägheitsmasse (22), die von einer ersten, instabilen Lagc im Normalbetrieb, in der die kugelförmige Trägheitsmasse (22) den Stromfluß im erwähnten elektrischen Stromkreis ermöglicht, in eine zweite stabile Lage (22a), in der der Stromfluß im Stromkreis, abhängig von einer scharfen Beschleunigung oder Verzögerung in eier horizontalen Ebene, unterbrochen ist, bewegbar ist.
    einen ersten elektrischen Kontakt (11) zum Öffnen oder Schließen mit einem zweiten elektrischen Kontakt (12), abhängig von der Lage der kugelförmigen Masse (22);
    Rückstellmittel (35, 46), um die kugelförmige, Trägheitsmasse (22) von der erwähnten zweiten Lage (22a) in die erwähnte erste Lage zu bringen;
    wobei in der erwähnten ersten Lage die kugelförmige Trägheitsmasse (22) zwischen einem konkaven Rückhaltesitz (44) und konvexen Rückhaltemitteln (54) angeordnet ist und die Masse von dem erwähnten konkaven Sitz (44) und den erwähnten konvexen Mitteln (54) entgegen einer im wesentlichen vertikalen Achse (a) zurückgehalten wird, dadurch gekennzeichnet, daß die Masse (22) mittels federnd vorgespannter Mittel (30) zurückgehalten wird und die erwähnten Rückstellmittel (46) einen oberen Druckknopf mit mehreren Fortsätzen (48), die untere nach außen divergierende, geneigte Flächen (49) aufweisen, umfassen, die eine Berührung der Masse in der besagten zweiten Position (22a) ermöglichen.
  2. Sicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß mindestens drei der erwähnten Fortsätze (48) mit unteren, nach außen divergierenden, geneigten Flächen (49) vorgesehen sind.
  3. Sicherheitsschalter nach Anspruch 1, dadurch gekennzeichnet, daß die erwähnten konvexen Rückhaltemittel ein Bauteil (54), beweglich in Richtung der erwähnten Achse (a), ist, wobei der bewegliche Bauteil (54) zwischen einer kugelförmigen Masse (22) und dem erwähnten ersten Kontakt (11), in Form eines elastischen Plättchens, angeordnet ist, das erwähnte Plättchen wiederum zwischen der erwähnten kugelförmigen Masse (22) und federnd vorgespannten Mitteln (30) angeordnet ist, die zusammenarbeiten, um die erwähnte Masse (22) zwischen dem erwähnten konkaven Sitz (44) und den erwähnten konvexen Mitteln (54) entlang der erwähnten Achse (a) zurückzuhalten.
  4. Sicherheitsschalter nach Anspruch 3, dadurch gekennzeichnet, daß der erwähnte bewegliche Bauteil (54) umfaßt:
    einen oberen, schmalen, schaftförmigen Endteil (54a), der normalerweise die erwähnte Masse (22) berührt,
    einen unteren, nach unten offenen, größeren Teil (54b), der von den federnd vorgespannten Mittel (30) berührt wird, wobei der erwähnte größere Teil (54b) es ermöglicht, daß der erste Kontakt (11) vom zweiten elektrischen Kontakt (12), abhängig von einer Bewegung der kugelförmigen Masse (22), geöffnet wird.
  5. Sicherheitsschalter nach Anspruch 4, dadurch gekennzeichnet, daß der schmale, schaftförmige Endteil (54a) in einer entsprechenden Bohrung des erwähnten ersten Kontaktes (11) eingesetzt ist.
EP94114007A 1993-09-17 1994-09-07 Sicherheitsschalter Expired - Lifetime EP0644568B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930683A IT1261869B (it) 1993-09-17 1993-09-17 Interruttore di sicurezza.
ITTO930683 1993-09-17

Publications (2)

Publication Number Publication Date
EP0644568A1 EP0644568A1 (de) 1995-03-22
EP0644568B1 true EP0644568B1 (de) 1997-06-25

Family

ID=11411739

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114007A Expired - Lifetime EP0644568B1 (de) 1993-09-17 1994-09-07 Sicherheitsschalter

Country Status (5)

Country Link
EP (1) EP0644568B1 (de)
BR (1) BR9403538A (de)
DE (1) DE69403944T2 (de)
ES (1) ES2105449T3 (de)
IT (1) IT1261869B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT237159Y1 (it) * 1995-09-20 2000-08-31 Cavis Srl Sensore di impatto particolarmente studiato per veicoli
IT1304681B1 (it) * 1998-10-08 2001-03-28 Kostal Italia S R L Interruttore di sicurezza destinato ad essere interposto in uncircuito elettrico di un veicolo.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH351011A (fr) * 1959-03-09 1960-12-31 Hydromecanique De Precision S Dispositif irréversible de fermeture d'un circuit électrique
CH486345A (de) * 1969-04-02 1970-02-28 Herzog Albert Stromkreisunterbrecher für Kraftfahrzeuge
FR2151585A5 (de) * 1971-08-27 1973-04-20 Corporandy Joseph
DE3128594A1 (de) * 1981-07-20 1983-02-03 Dannenberger Vorrichtungsbau -DAVO - Stellamanns u. Grönwoldt, 3138 Dannenberg "vorrichtung zum erfassen und zur anzeige einer uebermaessigen verzoegerung der fahrt eines kraftfahrzeuges"
FR2620855A1 (fr) * 1987-09-18 1989-03-24 Wermuth Jean Detecteur d'impact circonferentiel a rearmement manuel applicable a la commande d'arret d'organes par exemple pour vehicules et bateaux

Also Published As

Publication number Publication date
DE69403944T2 (de) 1997-11-20
BR9403538A (pt) 1995-05-16
IT1261869B (it) 1996-06-03
ITTO930683A0 (it) 1993-09-17
ES2105449T3 (es) 1997-10-16
EP0644568A1 (de) 1995-03-22
DE69403944D1 (de) 1997-07-31
ITTO930683A1 (it) 1995-03-17

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