EP0021122A1 - Boîtier pour appareils de commutation électriques - Google Patents

Boîtier pour appareils de commutation électriques Download PDF

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Publication number
EP0021122A1
EP0021122A1 EP80103033A EP80103033A EP0021122A1 EP 0021122 A1 EP0021122 A1 EP 0021122A1 EP 80103033 A EP80103033 A EP 80103033A EP 80103033 A EP80103033 A EP 80103033A EP 0021122 A1 EP0021122 A1 EP 0021122A1
Authority
EP
European Patent Office
Prior art keywords
housing
tongue
cover
wall
tongues
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.)
Withdrawn
Application number
EP80103033A
Other languages
German (de)
English (en)
Inventor
Fritz Ing. Krasser (Grad.)
Josef Kinner
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.)
Ellenberger and Poensgen GmbH
Original Assignee
Ellenberger and Poensgen 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 Ellenberger and Poensgen GmbH filed Critical Ellenberger and Poensgen GmbH
Publication of EP0021122A1 publication Critical patent/EP0021122A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers

Definitions

  • the invention relates to a housing for electrical switching devices with the features of the preamble of patent claim 1.
  • Such known plastic housings are closed according to the prior art with flat lids, the lids being mechanically firmly connected to the housing by means of rivets, screws or adhesive. If the connection is made with screws, the assembly of the covers is labor-intensive. If rivets or adhesive are provided for connecting the cover and the housing, this connection is easier to carry out, but has the disadvantage that the housing cannot be opened again without destroying the sensitive housing parts. Switching devices provided with such housings can therefore only be repaired with difficulty and usually have to be replaced completely in the event of malfunctions or failure of the switching function.
  • the invention has for its object to reduce the manufacturing costs for such housings and to save the connecting elements mentioned.
  • the connection between the housing and cover should be detachable and recoverable without special tools.
  • the invention makes it possible to completely dispense with rivets, screws or adhesives for fastening the housing cover.
  • the cover can simply be placed on the housing and brought so close to it by weak pressure that the tongues engage behind the projections and lock there. This connection can easily be released at any time by slightly lifting the free ends of the resilient tongues and the electrical switching device built into the housing can be cleaned or repaired, for example. Since the resilient tongues abut the outer walls of the housing, it is achieved that the interior of the housing is completely available for electrical switching elements and that the cover is also immovably attached to the housing opening.
  • the lid and the housing can be produced inexpensively in one operation, for example by injection molding.
  • the extensions arranged on the free ends of the resilient tongues are hook-shaped, whereby a particularly tight fit of the cover is brought about, for example, when the switching device vibrates (claim 2).
  • the cover seat on the housing is additionally improved, in particular when only two resilient tongues are arranged on two opposite side channels lateral displacement of the lid is completely prevented.
  • the outer edges of the tongues are guided through the side flanks of the groove during the closing process, thereby ensuring that the projections snap into place behind the projections arranged in the grooves.
  • the groove can be formed by two parallel guide webs projecting from the housing wall (claim 5). This advantageously prevents a weakening of the housing wall in the groove area or a loss of the housing interior.
  • the tongues are completely immersed in the grooves and are completely protected against lateral shear stress.
  • the features according to claim 7 further facilitate the lid assembly, in particular without additional tools.
  • a molding die for reaching the extension arranged on the inside of the tongue can reach through during the injection process of the cover, whereby the manufacture of the cover is simplified.
  • the size of the recess allows the locking force of the spring tongues to be easily adapted to the respective requirements.
  • a switching device 1 which has a rectangular housing 2 with a cover 3 arranged thereon.
  • a tongue 4 is formed on each of two opposite side edges 11 of the cover 3 and engages with its free end 5 behind a correspondingly arranged projection 6 of the housing 2.
  • the tongue 4 protrudes from the side edge 11 at right angles to the cover surface.
  • an extension 7 is formed, which is hook-shaped and protrudes at right angles from the tongue 4 to the lid center. This extension 7 engages in the closed position behind the housing projection 6, which protrudes from the housing outer wall 12 at right angles.
  • the tongue 4 lies in a groove 15 which extends at right angles to the upper edge 16 of the housing and is formed on the outer wall 12 of the housing.
  • the groove 15 has two parallel side flanks 17 which run at right angles to the outer wall 12 of the housing in the direction 20 and whose mutual spacing corresponds approximately to the width of the tongue 4.
  • the projection 6 runs parallel to the side edge 11 of the cover 3 between the side flanks 17 of the groove 15.
  • the cover surface is provided with a recess 10 in the area of the tongue attachment.
  • the outer edge 13 of the recess 10 is flush with the inside 14 of the tongue 4.
  • the width of the recess 10 corresponds essentially to the distance between the outer edges 18 of the tongue 4.
  • two tongues 4 are formed parallel to one another and at a short distance from one another on the cover side edge 11.
  • the free ends 5 of the two tongues 4 are connected by means of a crossbar 8 which runs parallel to the side edge 11 between the free ends 5.
  • the transverse web 8 engages behind the projection 6.
  • the extension 7 or the transverse web 8 is provided on its side facing the housing 2 with a bevel 9 which, during the closing process, acts on a sliding inclined surface 21 which on the side of the projection facing the cover 3 9 is formed.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Casings For Electric Apparatus (AREA)
EP80103033A 1979-06-16 1980-05-31 Boîtier pour appareils de commutation électriques Withdrawn EP0021122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19797917301 DE7917301U1 (de) 1979-06-16 1979-06-16 Gehäuse für elektrische Schaltgeräte
DE7917301U 1979-06-16

Publications (1)

Publication Number Publication Date
EP0021122A1 true EP0021122A1 (fr) 1981-01-07

Family

ID=6704937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103033A Withdrawn EP0021122A1 (fr) 1979-06-16 1980-05-31 Boîtier pour appareils de commutation électriques

Country Status (2)

Country Link
EP (1) EP0021122A1 (fr)
DE (1) DE7917301U1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579015A1 (fr) * 1985-03-18 1986-09-19 Telemecanique Electrique Interrupteur multipolaire a commande electromagnetique
DE9113293U1 (fr) * 1991-10-25 1992-11-19 Cherry Mikroschalter Gmbh, 8572 Auerbach, De

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329442A (en) * 1941-11-05 1943-09-14 Mc Gill Mfg Co Electric switch housing
DE1113516B (de) * 1959-11-27 1961-09-07 Elektro App Werke J W Stalin V Schutzkappe fuer elektrische Geraete, insbesondere fuer Relais
GB1028382A (en) * 1963-09-27 1966-05-04 Standard Telephones Cables Ltd Thermostat case
US3412225A (en) * 1965-07-12 1968-11-19 Robertshaw Controls Co Switch with hinged switch base and cover
FR1591978A (fr) * 1968-11-15 1970-05-04
GB1442332A (en) * 1972-12-19 1976-07-14 Bulgin Co Ltd A F Housings for electric switches
US4105883A (en) * 1976-06-09 1978-08-08 Cutler-Hammer, Inc. Electric switch having a frame with improved snap-in base retention means

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2329442A (en) * 1941-11-05 1943-09-14 Mc Gill Mfg Co Electric switch housing
DE1113516B (de) * 1959-11-27 1961-09-07 Elektro App Werke J W Stalin V Schutzkappe fuer elektrische Geraete, insbesondere fuer Relais
GB1028382A (en) * 1963-09-27 1966-05-04 Standard Telephones Cables Ltd Thermostat case
US3412225A (en) * 1965-07-12 1968-11-19 Robertshaw Controls Co Switch with hinged switch base and cover
FR1591978A (fr) * 1968-11-15 1970-05-04
GB1442332A (en) * 1972-12-19 1976-07-14 Bulgin Co Ltd A F Housings for electric switches
US4105883A (en) * 1976-06-09 1978-08-08 Cutler-Hammer, Inc. Electric switch having a frame with improved snap-in base retention means

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579015A1 (fr) * 1985-03-18 1986-09-19 Telemecanique Electrique Interrupteur multipolaire a commande electromagnetique
DE9113293U1 (fr) * 1991-10-25 1992-11-19 Cherry Mikroschalter Gmbh, 8572 Auerbach, De

Also Published As

Publication number Publication date
DE7917301U1 (de) 1979-10-04

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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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT CH DE FR GB IT

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19811214

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KRASSER, FRITZ, ING. (GRAD.)

Inventor name: KINNER, JOSEF