EP0320875B1 - Elektrische Beleuchtungseinrichtung für Hausgeräte, wie Backöfen - Google Patents

Elektrische Beleuchtungseinrichtung für Hausgeräte, wie Backöfen Download PDF

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Publication number
EP0320875B1
EP0320875B1 EP88120801A EP88120801A EP0320875B1 EP 0320875 B1 EP0320875 B1 EP 0320875B1 EP 88120801 A EP88120801 A EP 88120801A EP 88120801 A EP88120801 A EP 88120801A EP 0320875 B1 EP0320875 B1 EP 0320875B1
Authority
EP
European Patent Office
Prior art keywords
lamp
insulating material
lamp holder
contact
protective element
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
EP88120801A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0320875A2 (de
EP0320875A3 (en
Inventor
Günter Dipl.-Ing. Hammerl
Kurt Lintner
Josef Dipl.-Ing. Krautscheid
Johann Klement
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.)
BSH Hausgeraete GmbH
Original Assignee
Bosch Siemens Hausgerate 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 Bosch Siemens Hausgerate GmbH filed Critical Bosch Siemens Hausgerate GmbH
Publication of EP0320875A2 publication Critical patent/EP0320875A2/de
Publication of EP0320875A3 publication Critical patent/EP0320875A3/de
Application granted granted Critical
Publication of EP0320875B1 publication Critical patent/EP0320875B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/06—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other
    • H01R33/09—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for baseless lamp bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0005—Fastening of light sources or lamp holders of sources having contact pins, wires or blades, e.g. pinch sealed lamp
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/008—Illumination for oven cavities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/30—Lighting for domestic or personal use
    • F21W2131/307—Lighting for domestic or personal use for ovens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/44—Means for preventing access to live contacts

Definitions

  • the present invention relates to an electrical lighting device for domestic appliances, such as ovens, with an electrical, contact parts having a lamp holder made of insulating material, into which a lamp having an lamp base made of insulating material, with its contact pins emanating from this lamp base, can be inserted and contacted with the contact parts of the lamp holder is, wherein the insertion opening of the lamp holder protective elements made of electrically insulating material are assigned, which extend over a length of the lamp plug-in movement exceeding the plug-in contact distance or the contact pins with the required safety amount.
  • Such lighting devices can be independent electrical lights, which are arranged in the household appliances, or they are an integral part of household appliances.
  • touchable metallic parts which are connected to a protective conductor, must be separated from live parts with a working voltage of up to 130 V by operational insulation, taking into account an air gap of at least 1.5 mm and a creepage distance above the insulation material of at least 2.0 mm. Since overvoltages can also occur in household appliances, safety distances from live parts that can be touched for touchable glass bulbs of lamps have to be observed, to the extent that, in the worst case, the test point on this glass bulb has a voltage of 2750 V on the live parts not harmful. Clearances of at least 8.0 mm and creepage distances of at least 8.0 mm over the insulating material are to be implemented.
  • the present invention has for its object to design electrical lighting devices so that both the contact with live parts is completely excluded and there is also sufficient protection against the formation of electrical flashovers and creepage distances in the event of overvoltages.
  • these measures should be usable in connection with small installation dimensions and compact design, as are usually followed in lighting devices with plug-in sockets, in particular for so-called low-voltage lamps, for example halogen lamps.
  • An electrical lighting device that meets these requirements to an outstanding degree is characterized according to the invention in that the leakage currents consisting of electrically insulating material are sufficiently exclusive
  • the lamp holder is covered at least on the access side of the lamp holder of the lighting device with an electrically conductive and protective-earthed protective element reaching into the vicinity of the lamp glass bulb or its lamp base made of insulating material and that the distance between this protective element and the contact parts of the lamp holder in the plug-in direction of the lamp a required security amount is greater than the length of the contact pins of the lamp.
  • This measure according to the features according to the invention ensures that a protective-earthed protective element offers reliable protection against contact with the live parts of the lamp holder and the contact pins of the lamp, in particular when they are replaced. In spite of the insulation measures, arcing and leakage currents are certainly made harmless to the operator by the measures taken.
  • the electrical lighting device is characterized in that the electrically conductive and protective-grounded protective element is designed like a plate and is arranged on the access side in front of the lamp holder made of electrically insulating material, and is designed with a recess that is corresponding to the cross section of the lamp.
  • the circuit-board-like, electrically conductive and protective-earthed protective element can in this connection either be designed in a tubular manner to enclose or continue the lamp holder made of insulating material, or it can be arranged on struts leading past the lamp holder made of insulating material.
  • This electrically conductive protective element is connected in an electrically conductive manner to protective-earthed housing parts by means of both measures.
  • the electrical lighting device according to the invention is characterized in that the electrically conductive, protective-grounded protective element is arranged at a spatial distance from the lamp holder made of insulating material. This not only increases the leakage current gap between the electrically conductive parts, but also ensures that this is electrical conductive and thus usually also good heat-conducting protective element also represents a heat shield that shields the contact point between the contact pins of the lamp and the contact parts of the lamp holder. This is particularly desirable when the electrical lighting device is used in ovens. The high baking temperatures put a high load on these connectors.
  • the lighting device according to the invention is shown in each case as an independent luminaire, to be precise on a greatly enlarged scale.
  • a lamp 3 usually a low-voltage lamp, is inserted into this lamp holder 2.
  • This lamp 3 has a usually cylindrical lamp bulb 4, which is transferred to a pinched or tapered lamp base 5, and contact pins 6 of length a.
  • the contact pins 6 make contact with electrical contact parts 7 of the lamp base, these contact parts 7 extending in the form of contact rails along the contact pins 6 and being pressed against the contact pins 6 by springs 8.
  • the area of contact between the contact parts 7 and the contact pins 6 is referred to below as the plug contact path.
  • the contact pins 6 are precentered with respect to the contact parts 7. From these plug-in openings 9, the lamp holder 2 has a molded, tubular extension 10 of larger diameter, into which at least a large part of the lamp base 5 fits.
  • a lens-shaped, transparent glass cover 12 is screwed onto a flange 11 of the lamp housing 1. This glass cover 12 is unscrewed for inserting or replacing the lamp 3. Now e.g. the lamp 3 is pulled out of the lamp holder 2, the danger should be met that there is a manual contact with the contact pins 6 which have not yet been completely detached from the contact parts 7.
  • a protective element 13 made of electrically conductive material is arranged above the lamp holder 2 made of insulating ceramic material, which encloses the tubular extension 10 of the lamp holder 2 made of insulating ceramic material in a cylindrical manner, near the top is brought up to the wall of the lamp base 5 and is connected in an electrically conductive manner to the lamp housing 1 in the lower region via connecting bolts 14 passed through the lamp holder 2 and can therefore be grounded with the latter.
  • the length e between the upper edge of the protective element 13 and the first possibility of contacting between the contact pins 6 and the contact parts 7 is greater than the length a of the contact pins 6 and the wall thickness of the protective element 13, namely by an amount that corresponds to the required safety distances corresponds. Due to the tubular extension 10 of the lamp holder 2, the distances between the current-carrying parts and the protective-earthed part on the ceramic surface are brought to the required level in order to prevent creepage distances. An air gap is provided between the inner wall of the protective element 13 and the lamp holder 2, in which air convection is possible to a limited extent. As a result of this measure, the electrically conductive and protective-earthed protective element 13 also forms a heat shield with respect to the lamp holder 2, so that in particular the electrical contact points between the contact pins 6 and the contact parts 7 are relieved in terms of heat.
  • a circuit-like protective element 17 is arranged for the protection against contact, which is fastened to the lamp housing 1 via struts 18 and is connected to it in an electrically conductive manner.
  • the desired distance ratios correspond to those in the embodiment according to FIG. 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Connecting Device With Holders (AREA)
  • Electric Stoves And Ranges (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Radiation-Therapy Devices (AREA)
  • Endoscopes (AREA)
  • Electric Ovens (AREA)
EP88120801A 1987-12-15 1988-12-13 Elektrische Beleuchtungseinrichtung für Hausgeräte, wie Backöfen Expired - Lifetime EP0320875B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873742509 DE3742509A1 (de) 1987-12-15 1987-12-15 Elektrische beleuchtungseinrichtung fuer hausgeraete, wie backoefen
DE3742509 1987-12-15

Publications (3)

Publication Number Publication Date
EP0320875A2 EP0320875A2 (de) 1989-06-21
EP0320875A3 EP0320875A3 (en) 1990-05-16
EP0320875B1 true EP0320875B1 (de) 1994-07-27

Family

ID=6342665

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88120801A Expired - Lifetime EP0320875B1 (de) 1987-12-15 1988-12-13 Elektrische Beleuchtungseinrichtung für Hausgeräte, wie Backöfen

Country Status (6)

Country Link
US (1) US4870546A (enrdf_load_stackoverflow)
EP (1) EP0320875B1 (enrdf_load_stackoverflow)
AT (1) ATE109268T1 (enrdf_load_stackoverflow)
DE (2) DE3742509A1 (enrdf_load_stackoverflow)
ES (1) ES2056884T3 (enrdf_load_stackoverflow)
YU (1) YU47175B (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8903947U1 (de) * 1989-03-31 1990-10-18 Heraeus Instruments GmbH, 6450 Hanau Berührungsschutz für Scheinwerfer
US5121304A (en) * 1990-10-15 1992-06-09 Gte Products Corporation Vehicle lamp
EP0543448B1 (en) * 1991-11-18 1999-07-14 Koninklijke Philips Electronics N.V. Electric reflector lamp
IT1267720B1 (it) * 1994-05-20 1997-02-07 Zanussi Elettrodomestici Apparecchio frigorifero con porta-lampada perfezionato
US5660452A (en) * 1995-08-25 1997-08-26 Maytag Corporation Indicator light for an appliance
US5879073A (en) * 1996-01-29 1999-03-09 Koito Manufacturing Co., Ltd. Vehicular lamp having discharge bulb
US6361181B1 (en) 2000-02-28 2002-03-26 Maytag Corporation Appliance with light mounted in door
US7931381B2 (en) * 2008-12-19 2011-04-26 Whirlpool Corporation Lighting system for cooking appliance
DE102015114253B4 (de) * 2015-08-27 2017-06-22 Bjb Gmbh & Co. Kg Backofenleuchte
DE102021112796B3 (de) * 2021-05-18 2022-06-23 Bjb Gmbh & Co. Kg Lampenfassung mit ungenieteter Kontaktanbindung

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE406613C (de) * 1921-06-04 1924-11-29 Heinrich Gothe Aufklappbare Gluehlampenarmatur, deren einer Pol geerdet ist, mit im Gehaeuse fest angebrachtem federnden Kontakte und mit im Deckel sitzender Sicherung
GB524025A (en) * 1939-01-19 1940-07-29 Gen Electric Co Ltd Improvements in and relating to electric lighting fittings
FR1324333A (fr) * 1962-03-06 1963-04-19 Dispositif de sécurité pour lampes, notamment pour lampes de projecteurs de véhicules automobiles
NL6816006A (enrdf_load_stackoverflow) * 1968-11-09 1970-05-12
FR2421485A1 (fr) * 1978-03-31 1979-10-26 Barthelemy Louis Prise de courant de securite
US4222623A (en) * 1978-07-26 1980-09-16 Tore Hultberg Glow-lamp holder
DE2921425C3 (de) * 1979-05-26 1985-10-10 Pistor + Boss GmbH, 5880 Lüdenscheid Elektrische Leuchte für die Ausleuchtung von Backöfen
DE8131006U1 (de) * 1981-10-23 1983-04-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München Elektrische lampe
DE8710698U1 (de) * 1987-08-05 1987-09-17 Korsch, Alfred, 4154 Tönisvorst Leuchte
DE8711524U1 (de) * 1987-08-25 1987-10-08 Bosch-Siemens Hausgeräte GmbH, 8000 München Elektrische Leuchte für Hausgeräte

Also Published As

Publication number Publication date
YU47175B (sh) 1995-01-31
EP0320875A2 (de) 1989-06-21
EP0320875A3 (en) 1990-05-16
DE3850864D1 (de) 1994-09-01
DE3742509A1 (de) 1989-06-29
ATE109268T1 (de) 1994-08-15
YU226188A (en) 1991-04-30
US4870546A (en) 1989-09-26
DE3742509C2 (enrdf_load_stackoverflow) 1992-07-30
ES2056884T3 (es) 1994-10-16

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