EP0344628B1 - Douille antidéflagrante pour 2 broches-tubes fluorescents - Google Patents

Douille antidéflagrante pour 2 broches-tubes fluorescents Download PDF

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Publication number
EP0344628B1
EP0344628B1 EP89109490A EP89109490A EP0344628B1 EP 0344628 B1 EP0344628 B1 EP 0344628B1 EP 89109490 A EP89109490 A EP 89109490A EP 89109490 A EP89109490 A EP 89109490A EP 0344628 B1 EP0344628 B1 EP 0344628B1
Authority
EP
European Patent Office
Prior art keywords
contact
fitting
pins
fluorescent lamp
slot
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
EP89109490A
Other languages
German (de)
English (en)
Other versions
EP0344628A1 (fr
Inventor
Herbert Atteln
Heinz Liedtke
Reinhard Neumann
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.)
ABB Ceag Licht und Stromversorgungstechnik GmbH
CEAG Licht und Stromversorgungstechnik GmbH
Original Assignee
ABB Ceag Licht und Stromversorgungstechnik GmbH
CEAG Licht und Stromversorgungstechnik 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 ABB Ceag Licht und Stromversorgungstechnik GmbH, CEAG Licht und Stromversorgungstechnik GmbH filed Critical ABB Ceag Licht und Stromversorgungstechnik GmbH
Publication of EP0344628A1 publication Critical patent/EP0344628A1/fr
Application granted granted Critical
Publication of EP0344628B1 publication Critical patent/EP0344628B1/fr
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
    • H01R33/965—Dustproof, splashproof, drip-proof, waterproof, or flameproof holders
    • H01R33/9658—Dustproof, splashproof, drip-proof, waterproof, or flameproof holders for tubular fluorescent lamps
    • 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
    • H01R33/965—Dustproof, splashproof, drip-proof, waterproof, or flameproof holders
    • 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
    • H01R33/08—Two-pole devices with two current-carrying pins, blades or analogous contacts, having their axes parallel to each other for supporting tubular fluorescent lamp

Definitions

  • the invention relates to an explosion-proof socket for fluorescent lamps with a two-pin base with a flameproof switchgear serving to interrupt the circuit, which is limited by a socket housing made of insulating material and a socket body rotatably inserted therein, which serves to hold the pins of the fluorescent lamp.
  • EN 50019 The minimum requirements for lamps that are intended for use in potentially explosive atmospheres and that are subject to increased safety standards are defined in EN 50019.
  • EN 50019, paragraph 4.3.1.a to c regulates the use of starterless fluorescent lamps with a single-pin base.
  • Such an explosion and fireproof version for receiving fluorescent lamps with a single-pin base has become known from DE-OS 21 26 525.
  • the contact with the pin of the fluorescent lamp is made by an axially displaceable contact piece, which in this way compensates for a length tolerance of the pin length.
  • the use of single-pin fluorescent lamps in luminaires for use in hazardous areas has a high price, is not available everywhere and therefore requires additional storage. This has led to the development of firedamp and explosion-proof encapsulated sockets for fluorescent lamps with a two-pin base.
  • Such a socket has become known from DE-AS 25 12 991, in which a socket housing consisting of insulating material contains a rotatable socket insert with metallic contact springs for receiving the pins of the fluorescent lamp.
  • the contact springs are connected to contact pins which are arranged in bores in the socket insert and can be contacted in the contact space with resilient contact bolts connected to the electrical conductors.
  • the contact bolts in the socket housing as well as the contact pins in the socket insert are arranged diametrically opposite each other and can either be connected or disconnected by rotating the socket insert by 90 °.
  • the flameproof encapsulated contact space is limited by the pot-shaped socket housing as well as by the socket insert that fits precisely into it.
  • the contact springs which establish the electrical connection with the pins of the fluorescent lamp are designed in the same way as in commercially available lamp sockets intended for use in normal areas. They have a loop, in which the pins engage and lie anywhere, which creates the connection. The loop size is significantly larger than the pin cross-section. This is done to compensate for any deviations in the position of the pins in the two-pin base in accordance with the permissible manufacturing tolerances. On the other hand, this has the disadvantage that each electrical conductor can only be connected to the fluorescent lamp via a contact point. In addition, aging-related cover layers on the contact surfaces can cause contact difficulties which can lead to faults.
  • the object is achieved in that the socket body has a contact piece for receiving the pins of the fluorescent lamp used, which contacts each of the pins in two places.
  • the contact piece is provided with a contact slot into which the pins are inserted and the slot surfaces of which resiliently abut the pins.
  • the two pins each Two pin bases of a fluorescent lamp contact the same contact piece, whereby the number of contact points doubles again.
  • the contact piece has a U-shaped cross section with contact springs arranged on the free ends of its legs.
  • the contact springs that follow the longitudinal axis of the contact piece limit the contact slot. At the same time, they give the contact piece the appearance of a longitudinally slotted box that is open on both faces.
  • a special embodiment of the contact springs provides that they are integrally formed on the leg ends of the contact piece in an angled manner similar to barbs.
  • it can further be provided to provide the slot surfaces of the contact springs inclined to the slot plane with an edge similar to a knife edge, which engages the pins in a force-fitting manner and thereby, like a scraper, always ensures perfect galvanic contact.
  • a further improvement of the invention provides that the socket body carrying the contact springs is axially secured against sliding out of the socket housing with the aid of a socket carrier.
  • the lampholder is in turn firmly connected to the lampholder housing and engages over the lampholder body to such an extent that the insertion of the fluorescent lamp and the contacting of the pins of its two-pin base in the lampholder are not impaired.
  • a sleeve is provided which is intended to protect the fluorescent lamp inserted into the socket from inadmissible stresses caused by vibrations and shocks.
  • the cuff mentioned encompasses the cylindrical fluorescent tube using a vibration-damping intermediate layer, which is arranged radially between the fluorescent lamp and the cuff, and is further supported on the lamp holder. In this way, the vibration and vibration sensitive connection between the two-pin base and the glass body of the fluorescent lamp is relieved. At the same time, the sleeve with the intermediate layer seals off the contact point of the fluorescent lamp in the lamp holder.
  • the socket body Only when the fluorescent lamp is inserted in the socket can the socket body be rotated by 90 °. However, the rotation through 90 ° in turn only causes the electrical connection of the contact piece arranged in the socket body to the contact bolts of the electrical feed arranged in the socket housing.
  • a socket 10 for a two-pin fluorescent lamp 12 is shown in longitudinal section, which has a socket housing 14, and has a socket body 16 and a socket holder 18.
  • the socket housing 14 is pot-shaped and has an approximately circular base 20 with a concentrically formed Cylinder wall 22 which laterally delimits the socket housing 14.
  • the bottom 20 of the lampholder housing 14 is provided with a flange 24 beyond the cylinder wall 22, which flange serves to support the socket carrier 18 which overlaps the cylinder wall 22 and is likewise pot-shaped.
  • the socket body 16 is inserted with a precise fit, so that a minimal gap is present between the inner surface of the cylinder wall 22 and the peripheral surface of the cylindrical socket body 16.
  • the socket body 16 is designed as a circular cylindrical disk and has on its side facing away from the base 20 a cross-like recess 25, in which a contact piece 26 is inserted.
  • the contact piece 26 is a box profile which is provided with a longitudinal slot and is open at both end faces, the rectangular cross section of which can be clearly seen in particular from FIGS. 3 and 5.
  • a contact strip 28 engages in the recess 25 in the socket body 16, which, as shown in FIGS. 3 and 5, the contact piece 26 to which it is connected in an electrically conductive manner, for. B. by means of rivets or spot welding, with two contact pins 30 conductively connects.
  • the contact slot 27 already mentioned in the contact piece 26 serves to receive pins 32 which extend from the two-pin base 34 of the fluorescent lamp 12.
  • two dome-shaped troughs 36 which cooperate with a contact pin 38, are formed diametrically opposite each other on a concentric circle.
  • the contact pin 38 is in a cylindrical Stub 40 guided longitudinally.
  • the connecting piece wall of the connecting piece 40 adjoins eccentrically, ie at the distance of the radius relevant for the dome-shaped recesses 36 on the socket body 16, on the outside of the base 20 and connects its interior with the space delimited by the base 20 and the cylinder wall 22, which forms the socket body 16 records.
  • the face of the contact pin 38 facing the socket body is form-fittingly adapted to the dome-shaped indentation 36 in the socket body 16, while the opposite, essentially flat end face of the contact pin 38 is acted upon by a compression spring 42 and is connected to a feed line 44.
  • the contact pin 38 acted upon by the compression spring 42 is pressed against the socket body 16 and, by its engagement in the spherical trough 36, prevents the contact body 36 from being inadvertently rotated spreads.
  • the frame carrier 18 also has a cylindrical wall 46, which bears against the outside of the cylinder wall 22 of the socket housing 14 and is provided on its edge with a circumferential flange 48 which is supported on the flange 24 of the socket housing 14 and by means of a connecting element 49, for. B. rivet, is permanently connected to the socket housing.
  • the flange 48 of the holder 18 is extended and provided with an angle 50, which serves as a support or fastening surface for the holder 10.
  • the recess 19 has the shape of a circle which is extended outwards at one point by a radially arranged slot 52. Aligned with this slot 52, the cylinder wall 22 of the socket housing 14 is also provided with a corresponding indentation 53. The indentation 53 in turn is aligned with a corresponding position of the socket body 16 with a recess 54 in the socket body 16 which adjoins the recess 25 diametrically opposite in the direction of the longitudinal axis of the contact body 26.
  • the socket body 16 requires that to insert a fluorescent lamp 12, d. H. their pins 32 of the two-pin base 34, this is moved radially from the outside inwards.
  • the axial depth of the slot 52 in the holder or the recess 53 in the holder housing and the recess 54 in the holder 16 corresponds at least to the length of the pins 32 of the two-pin base 34 of the fluorescent lamp 12.
  • the end view of the mount carrier 18 shown in FIG. 2 provides a view through the circular recess 19 of the socket body 16 with the cross-like recess 25 and the contact piece 26 and the contact strip 28 arranged therein, which is connected to the contact pins 30, not shown here .
  • Figure 3 shows the arrangement known from Figure 1, but in which the socket body 16 is rotated by 90 °, so that instead of the longitudinal view of the contact piece 26, its transverse view can be seen. Likewise, due to the rotation through 90 °, the recesses 54, which are aligned with the recess 53 in FIG. 1, cannot be seen.
  • a further deviation in this illustration relates to the contact bolts 30, which are inserted into the socket body 16 from the side of the socket body 16 facing the bottom 20 of the socket housing 14 and are connected to the contact strip 28 on the opposite side.
  • the socket carrier 30 are provided on their end face facing the bottom 20 with a dome-like indentation which interacts with the contact pin 38.
  • the same effect is achieved with respect to the rotation as with the recesses 36 embedded in the holder body 16 shown in FIG. 1.
  • the electrical feed for the contact piece 26 is also hereby carried out, which has the pins 32 of the fluorescent lamp inserted therein in its contact slot 27 12 contacted.
  • FIG. 4 shows the end view of the mount carrier 18 in accordance with the cut shown in FIG. 3, section line III-III.
  • the socket body 16 is rotated by 90 ° Takes position. According to what has been said above, it is clear that disassembly of the fluorescent lamp 12 is not possible in this position, since the displacement path predetermined by the contact slot 27 is laterally limited by the edge of the recess 19.
  • this embodiment of the contact piece 26 according to the invention regularly leads to a contact cleaning, since due to the resilient application of the slotted surfaces 271 to the pin 32 on the contacting surfaces, the cover layers due to oxidation regularly, ie with each actuation, e.g. B. when changing, mechanically eliminated. The resulting increased contact resistances, which can lead to creeping discharges, are therefore definitely excluded.
  • FIG. 6 shows the longitudinal section through a lamp holder 11 which, compared to the arrangement shown in FIG. 3, has a redundant feed through a second connecting piece 40 with a contact pin 38 guided therein.
  • the second connection piece 40 like the first connection piece 40, adjoins the outer surface of the base 20 of the socket housing 14.
  • the longitudinally displaceable contact pin 38 serves to additionally contact the contact pin 30 already redundant in the contact body, so that a feed to the contact piece 26 is secured in a redundant manner.
  • Another feature that can be seen from FIG. 6 relates to the design of a sleeve 60, which is pushed as a hollow cylinder over the fluorescent lamp and held at a distance by an insulation pad 62 arranged radially therebetween.
  • the sleeve 60 is covered with the insulation packing 62 on its inside up to approximately half of its axial extent. This area lies fully against the glass body of the fluorescent lamp 12.
  • the lamp holder 10, 11 corresponds to the relevant regulations with regard to the requirements for the pressure-encapsulated operating mode and increased safety.
  • Both the socket body 16 has tight tolerances with respect to the socket housing 14, as a result of which the circumferential gap is minimized.
  • the contact pin 38 slidably guided in the cylindrical socket 40 is dimensioned such that the gap formed between its cylindrical surface and the inner surface of the socket corresponds to the regulations in connection with the available gap length.
  • the lamp holder 10, 11 is free of voltage. Voltage is only present when the fluorescent lamp 12 is completely inserted into the lamp holder 10, 11 and is rotated through an angle of 90 °.
  • both the socket housing 14 and the socket body 16 as well as the socket carrier 18 are made from temperature-resistant and aging-resistant insulating material, the occurrence of dangerous leakage currents is also reliably prevented.
  • the design of the contact devices i.e. H. the contact piece 26, the contact strip 28, the contact pins 30 and the contact pin 38 is provided so that a reliable contact is always guaranteed. This is achieved by using compression springs 42 for the contact bushes 38 or spring material for the contact piece 26 and the contact strip 28.
  • a self-cleaning effect of the contact surfaces is connected due to the design of the contact piece 26, i. That is, after a lamp change, the contact surfaces are automatically cleaned due to mechanical stress and thus a good and secure contact is always guaranteed.
  • the economic advantage with this invention is also unmistakable because the use of conventional, commercially available fluorescent lamps is possible and also permissible with the lamp holder according to the invention.
  • the operator of explosion-proof lamps is released from the special stockpiling of the previously customary single-pin base fluorescent lamps and can instead use the commercially available two-pin fluorescent lamps.

Landscapes

  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Connecting Device With Holders (AREA)

Claims (11)

  1. Douille anti-déflagrante pour tubes fluorescents munis d'un culot à deux broches, laquelle douille comporte une chambre de commutation blindée anti-déflagrante, qui sert à ouvrir le circuit électrique et est délimitée par un boîtier de douille en matière isolante et un élément formant douille inséré de façon rotative dans ce boîtier et destiné à recevoir les broches du tube fluorescent, caractérisée par le fait que l'élément formant douille (16) porte une pièce de contact (26) qui assure le contact avec chacune des broches (32) du tube fluorescent (12) en deux endroits.
  2. Douille selon la revendication 1, caractérisée par le fait que la pièce de contact (26) est pourvue d'une fente de contact (27) dont les surfaces (271) sont appliquées élastiquement contre les broches (32) introduites dans la fente.
  3. Douille selon la revendication 1 ou 2, caractérisée par le fait que la pièce de contact (26) présente une section en forme de U avec des lames de contact (272) disposées aux extrémités libres de ses branches, lesquelles lames de contact (272) délimitent la fente de contact (27), disposée suivant l'axe longitudinal de la pièce de contact (26), avec les surfaces de fente.
  4. Douille selon la revendication 3, caractérisée par le fait que les lames de contact (272) sont respectivement formées d'une seule pièce aux extrémités des branches de la pièce de contact (26) et sont repliées vers l'intérieur à la manière d'une griffe.
  5. Douille selon l'une des revendications 1 à 4, caractérisée par le fait que l'application élastique des lames (272) contre les broches (32) introduites dans la fente de contact (27) permet d'éliminer mécaniquement des couches ou dépôts formés sur ces broches et faisant isolant.
  6. Douille selon l'une des revendications 1 à 5, caractérisée par le fait que les surfaces (271) des lames de contact (272) inclinées en direction du plan de la fente présentent une arête vive qui est appliquée par adhérence contre les broches (32).
  7. Douille selon l'une des revendications précédentes, caractérisée par le fait que la pièce de contact (26) est en bronze à ressorts.
  8. Douille selon l'une des revendications précédentes, caractérisée par le fait qu'il est prévu un support de douille (18) qui est solidaire du boîtier (14) et bloque l'élément formant douille (16) axialement pour l'empêcher de glisser hors du boîtier (14).
  9. Douille selon l'une des revendications précédentes, caractérisée par le fait que le boîtier de douille (14), l'élément formant douille (16) et le support de douille (18) sont en matière isolante résistant aux températures élevées et au vieillissement.
  10. Douille selon la revendication 9, caractérisée par le fait que la matière isolante est une résine thermodurcissable.
  11. Utilisation d'une douille selon l'une des revendications précédentes avec une gaine (60) qui entoure concentriquement le tube fluorescent (12) relié à la douille (10, 11) et supporte le tube fluorescent (12) à l'aide d'un rembourrage d'amortissement (62), qui est disposé radialement entre la gaine et le tube fluorescent (12), et empêche ainsi la transmission de secousses et de vibrations, par l'intermédiaire de la pièce de contact (26), au culot à deux broches (34) du tube fluorescent (12).
EP89109490A 1988-06-03 1989-05-26 Douille antidéflagrante pour 2 broches-tubes fluorescents Expired - Lifetime EP0344628B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818857 1988-06-03
DE3818857A DE3818857A1 (de) 1988-06-03 1988-06-03 Explosionsgeschuetzte fassung fuer zweistift-leuchtstofflampen

Publications (2)

Publication Number Publication Date
EP0344628A1 EP0344628A1 (fr) 1989-12-06
EP0344628B1 true EP0344628B1 (fr) 1993-12-08

Family

ID=6355748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109490A Expired - Lifetime EP0344628B1 (fr) 1988-06-03 1989-05-26 Douille antidéflagrante pour 2 broches-tubes fluorescents

Country Status (3)

Country Link
EP (1) EP0344628B1 (fr)
DE (2) DE3818857A1 (fr)
NO (1) NO176259C (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4040262B4 (de) * 1990-12-17 2009-03-05 Cooper Crouse-Hinds Gmbh In eine Leuchte einbaubarer Fassungsträger für wenigstens eine Fassung zur Aufnahme einer Zweistiftsockel-Leuchtstofflampe
DE19522719C1 (de) * 1995-06-22 1997-01-30 Stahl R Schaltgeraete Gmbh Explosionsgeschützte Lampenfassung mit wahlweise zu öffnenden und zu schließenden Kontaktmitteln
FR2741481B1 (fr) * 1995-11-20 1998-01-23 Legrand Sa Douille pour lampe tubulaire, en particulier pour lampe a decharge destinee a equiper un luminaire en atmosphere explosible
FR2775838B1 (fr) * 1998-03-03 2000-05-05 Drilling Technical Supply Douille pour lampe a fluorescence a culot a deux broches
DE20014168U1 (de) * 2000-08-17 2001-12-20 Ceag Sicherheitstechnik Gmbh Explosionsgeschützte Leuchte und Steckverbindung
DE10120564A1 (de) * 2001-04-26 2002-10-31 Aqua Signal Ag Leuchte mit Explosions-Schutz
DE102004045456B4 (de) * 2004-09-20 2010-08-19 BöSha Technische Produkte GmbH & Co. KG Explosionsgeschützte Vierstift-Lampenfassung und explosionsgeschützte Leuchte

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7141852U (de) * 1971-11-05 1972-03-02 Mellert H Mehrteilige Leuchtstofflampenfassung
DE2512991C3 (de) * 1975-03-24 1978-08-24 Ceag Licht- Und Stromversorgungstechnik Gmbh, 4770 Soest Explosionssichere Fassung für Leuchtstofflampen
DD210506A1 (de) * 1982-09-30 1984-06-13 Narva Leuchtenbau Kupplungsvorrichtung, insbesondere einbaufassung fuer leuchten

Also Published As

Publication number Publication date
NO176259B (no) 1994-11-21
NO892258D0 (no) 1989-06-02
NO892258L (no) 1989-12-04
NO176259C (no) 1995-03-01
DE58906339D1 (de) 1994-01-20
DE3818857A1 (de) 1989-12-07
EP0344628A1 (fr) 1989-12-06

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