EP0022539A1 - Interrupteur électrique à contacts glissants - Google Patents

Interrupteur électrique à contacts glissants Download PDF

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Publication number
EP0022539A1
EP0022539A1 EP80103873A EP80103873A EP0022539A1 EP 0022539 A1 EP0022539 A1 EP 0022539A1 EP 80103873 A EP80103873 A EP 80103873A EP 80103873 A EP80103873 A EP 80103873A EP 0022539 A1 EP0022539 A1 EP 0022539A1
Authority
EP
European Patent Office
Prior art keywords
contact
switch
insulating material
switch according
carrier
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.)
Ceased
Application number
EP80103873A
Other languages
German (de)
English (en)
Inventor
Bernard Dipl.-Ing. Valentin
Ernst Ing. Grad. Heinl
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.)
Honeywell GmbH
Original Assignee
Honeywell 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 Honeywell GmbH filed Critical Honeywell GmbH
Publication of EP0022539A1 publication Critical patent/EP0022539A1/fr
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/40—Contact mounted so that its contact-making surface is flush with adjoining insulation

Definitions

  • the invention relates to an electrical switch according to the preamble of claim 1.
  • the contact material must consist of a highly conductive material. If it is also required that the low contact resistance should not be increased by oxidation or other impairment of the surface properties of the contact material, then practically only noble metals, in particular gold, come into question as the contact material. However, gold is a relatively soft material, so that such contacts can carry over, particularly if the contact springs are under great tension on the contacts. This is often necessary if the switch has to ensure vibration-proof and acceleration-proof contact.
  • the object of the invention is to provide an electrical switch of the type mentioned, in which despite the use of relatively soft contact material and despite high contact pressure a reduction in the insulation resistance due to carryover is avoided.
  • This object is achieved by the invention characterized in claim 1. Due to the fact that the insulating material carrier is set behind the contact, any contact wear will collect in this part. However, since when the switch is open, the mating contact spring does not rest on this recessed section of the insulating material support but on a raised part arranged laterally therefrom, on which no contact material can be carried over, the high insulation resistance between the contact and the mating contact spring remains unaffected.
  • the switch is characterized by a simple, constructive design and high long-term reliability. Advantageous refinements result from the subclaims.
  • the insulating material carrier 1 is shown in section and in Fig. 1d in plan view. It consists, for example, of polyamide or a glass fiber reinforcing plastic. Embedded in the top of the insulating material carrier 1, for example pressed in, is a bow-shaped flat contact 2 which interacts with a mating contact spring 3 which is only partially shown. Either the insulating material carrier 1 is arranged fixed to the housing and the mating contact spring 3 can be displaced in the direction of the arrows or vice versa. 1a and 1b, the mating contact spring 3 rests on the contact 2, ie the switch is closed. If the contact spring 3 is brought into the position shown in dashed lines in FIGS.
  • the contact is interrupted.
  • the contact spring 3 now rests on side elevations 4 of the insulating material carrier 1 which extend parallel to the relative movement, with inclined surfaces 5 ensuring a smooth sliding transition from the surface of the contact 2 to the parts 4 which are slightly raised relative to the contact plane.
  • the contact material therefore does not reach the raised parts 4 of the insulating material carrier 1, on which the contact spring 3 'rests.
  • the insulation resistance is not impaired by any carryover of contact material of contact 2, which is made of gold, for example.
  • contact material of contact 2 which is made of gold, for example.
  • the surface 7 of the insulating material carrier 1 is lowered to below the surface level of the contact 2, so that the mating contact spring 3 rests there on the contact 2.
  • a bead 4 serving as a contact spring support is provided only on one side of the contact 2.
  • FIG. 2 shows a section of a changeover switch with contacts 12 attached on both sides to the insulating material carrier 11, which work together with three fixed contact spring pairs 13, 13 'and 13 ".
  • the two contact springs of each pair are formed by the legs of a hairpin-shaped bent contact spring 17, which are formed in one metallic terminal block 18.
  • This embodiment with double contacts is particularly suitable for switches which are exposed to vibrations or accelerations If the contact force of one contact spring leg is reduced, that of the other contact spring leg will increase at the same time, so that reliable contacting is guaranteed .
  • the contact spring pairs 13 and 13 ' are connected to one another via the contacts 12. If the insulating material carrier 11 is moved in the direction of the arrow 19, this connection is interrupted and instead a connection is established between the pairs of contact springs 13 'and 13 ".
  • the contact spring legs 13" not resting on the contacts 12 are here in turn located on lateral, bead-like elevations 14, which extend parallel to the direction of displacement and enclose between them a recessed section 16 for receiving possibly removed contact material.
  • Fig. 3 shows the application of such a shock-resistant slide switch as a pressure-operated multiple switch.
  • a ring membrane 25 which rests on a bell-shaped contact carrier 26, is clamped in a three-part cylindrical housing consisting of a hollow cylindrical middle part 21, a cover 22 and a bottom part 23 between a shoulder 24 of the middle part 21 and the cover 22.
  • the membrane plate 27 clamps the inner bead of the membrane 25 with the contact carrier 26. If a pressure medium, for example air or water, is introduced into the chamber 29 via the inlet openings 28, this displaces the bell-shaped contact carrier 26 downwards as soon as the holding force of the ball lock 30 is exceeded is. While in the rest position shown the contact 36 connects the contact springs 37 and 37 ', such a switching movement under the influence of the pressure in the chamber leads to the removal of this contact and instead to an electrical connection of the contact spring pairs 37' and 37 "via the contact 36.
  • the individual contact springs are also held here as hairpin-shaped double springs in a metallic connecting piece 38 and fastened in the switch housing with the interposition of insulating disks 31.
  • Connecting lines 32 lead from the individual connecting contacts 38 to a cable entry 33.
  • which switches can be designed as work contacts, normally closed contacts or changeover contacts in the manner mentioned above, all of which are switched simultaneously using the common contact carrier 26, which carries the insulating material carriers 35 designed as rectangular pins.
  • Fig. 4 shows the design of the switch as a rotary switch.
  • a housing consisting of a hollow cylindrical middle part 41 with a cover 42 and a bottom 43, in which two ring-shaped contact carriers 44 and 45 are held at a distance from one another in a manner fixed to the housing.
  • the formation of the contacts 46, 47 can be seen from Fig. 4c.
  • a contact spring carrier 50 which carries bow-shaped counter-contact springs 51, is non-rotatably fastened on a square profile 48 of the switch axis 49.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Slide Switches (AREA)
  • Relay Circuits (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP80103873A 1979-07-12 1980-07-08 Interrupteur électrique à contacts glissants Ceased EP0022539A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792928104 DE2928104A1 (de) 1979-07-12 1979-07-12 Elektrischer schalter
DE2928104 1979-07-12

Publications (1)

Publication Number Publication Date
EP0022539A1 true EP0022539A1 (fr) 1981-01-21

Family

ID=6075491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103873A Ceased EP0022539A1 (fr) 1979-07-12 1980-07-08 Interrupteur électrique à contacts glissants

Country Status (3)

Country Link
EP (1) EP0022539A1 (fr)
DE (1) DE2928104A1 (fr)
NO (1) NO802090L (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE488194C (de) * 1929-12-20 Aeg Drehschalter mit federnden Kontaktstiften
CH215758A (de) * 1940-06-05 1941-07-15 W Schaufelberger & Co Dr Elektrischer Vielfachschalter.
US2755347A (en) * 1952-07-16 1956-07-17 Grigsby Allison Company Inc Electric switch construction
FR1261678A (fr) * 1960-07-01 1961-05-19 Philips Nv Interrupteur à contacts glissants
GB928511A (en) * 1958-05-12 1963-06-12 Nsf Ltd Improvements in and relating to electric switches
FR1334733A (fr) * 1961-09-28 1963-08-09 Philips Nv Commutateur coulissant à porte-contacts en forme de bandes
FR2013569A1 (fr) * 1968-07-24 1970-04-03 Litton Industries Inc
DE2017348A1 (de) * 1969-04-19 1970-10-22 Amp Inc., Harrisburg, Pa. (V.St.A.) Elektrischer Wählschalter
DE2458843A1 (de) * 1974-12-12 1976-06-24 Telefonbau & Normalzeit Gmbh Kontaktanordnung fuer schalter

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE488194C (de) * 1929-12-20 Aeg Drehschalter mit federnden Kontaktstiften
CH215758A (de) * 1940-06-05 1941-07-15 W Schaufelberger & Co Dr Elektrischer Vielfachschalter.
US2755347A (en) * 1952-07-16 1956-07-17 Grigsby Allison Company Inc Electric switch construction
GB928511A (en) * 1958-05-12 1963-06-12 Nsf Ltd Improvements in and relating to electric switches
FR1261678A (fr) * 1960-07-01 1961-05-19 Philips Nv Interrupteur à contacts glissants
FR1334733A (fr) * 1961-09-28 1963-08-09 Philips Nv Commutateur coulissant à porte-contacts en forme de bandes
FR2013569A1 (fr) * 1968-07-24 1970-04-03 Litton Industries Inc
DE2017348A1 (de) * 1969-04-19 1970-10-22 Amp Inc., Harrisburg, Pa. (V.St.A.) Elektrischer Wählschalter
DE2458843A1 (de) * 1974-12-12 1976-06-24 Telefonbau & Normalzeit Gmbh Kontaktanordnung fuer schalter

Also Published As

Publication number Publication date
DE2928104A1 (de) 1981-01-22
NO802090L (no) 1981-01-13

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): FR GB IT NL SE

17P Request for examination filed

Effective date: 19810715

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19831224

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RIN1 Information on inventor provided before grant (corrected)

Inventor name: HEINL, ERNST, ING. GRAD.

Inventor name: VALENTIN, BERNARD, DIPL.-ING.