EP0622822B1 - Single-ended low-pressure discharge lamp - Google Patents

Single-ended low-pressure discharge lamp Download PDF

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Publication number
EP0622822B1
EP0622822B1 EP19940104992 EP94104992A EP0622822B1 EP 0622822 B1 EP0622822 B1 EP 0622822B1 EP 19940104992 EP19940104992 EP 19940104992 EP 94104992 A EP94104992 A EP 94104992A EP 0622822 B1 EP0622822 B1 EP 0622822B1
Authority
EP
European Patent Office
Prior art keywords
supporting part
discharge tube
mantle
discharge
board
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
EP19940104992
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0622822A1 (en
Inventor
Jozsef Fülöp
Miklos Hargitai
Ferenc Lantos
István Würsching
Leon F. Chamberlain
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.)
Tungsram Rt
Original Assignee
Tungsram Rt
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 Tungsram Rt filed Critical Tungsram Rt
Publication of EP0622822A1 publication Critical patent/EP0622822A1/en
Application granted granted Critical
Publication of EP0622822B1 publication Critical patent/EP0622822B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H01J5/54—Means forming part of the tube or lamps for the purpose of providing electrical connection to it supported by a separate part, e.g. base
    • H01J5/56—Shape of the separate part

Definitions

  • the invention relates to a single-ended low-pressure discharge lamp comprising a discharge tube filled with gas and additive and sealed in a gas-tight manner and provided with electrodes connected to current conductors at its ends, and an electronic unit provided with a circuit board and circuit components for operating the discharge tube, and a housing having a base for insertion into a lampholder, and the discharge tube is composed of the tube members connected to each other in a way to allow the passage of the discharge, and the housing has a hollow base supporting part to accept the electronic unit and a discharge tube supporting part fixed to the base supporting part and holding the discharge tube, and the discharge tube supporting part has a connection portion and a mantle placed around the connection portion further the mantle is provided with primary adapter portions and the base supporting part with secondary adapter portions fitting to the shape of the primary adapter portions, the primary adapter portions are lugs forming the continuation of the mantle of the discharge tube supporting part and protruding from the edge of the mantle, while the secondary adapter portions are slots sunk into the wall
  • Compact fluorescent lamps although having favorable illumination and economical features, suffer from the disadvantage that - due to the constructional features of these light sources - they are difficult to fit to luminaires designed for conventional incandescent lamps.
  • the purpose of the invention is to eliminate the disadvantages of known compact fluorescent lamps and to create a single-ended discharge lamp which has a circuit board mounted vertically, i.e. parallel to the axis of the discharge lamp, and the horizontal support of the vertical circuit board is accomplished in a simple way.
  • the conception of the invention is based on the recognition that the above task can be solved if board supports of special shape and position are placed in the discharge tube supporting part which board supports can hold the circuit board.
  • a single-ended low-pressure discharge lamp according to the invention with the features of the preamble of claim 1 is characterized in that at the neighborhood of the primary adapter portions the discharge tube supporting part has two board supports holding the circuit board and placed on the internal surface of the mantle of the discharge tube supporting part, which board supports are integral portions of the discharge tube supporting part and each board support contains two ribs running side by side and supporting opposite surfaces of the circuit board, which board support protrude from the space of the discharge tube supporting part into that of the base supporting part, further between the two ribs each board support has its longitudinal axis which is parallel to the axis of the discharge tube supporting part.
  • the supporting extensions are formed as two ribs oriented side by side in the direction of the longitudinal axis, placed on the inside surface of the mantle and going on over the inner side of the primary adapter member. Between the two ribs a support shoulder is placed that protrudes from the inside surface of the mantle and/or from the inner side of the primary adapter member.
  • the low-pressure discharge lamp according to the invention has the advantage of enabling the use of discharge tubes consisting of more tube members than the conventional ones and the assembling of these with a housing of unchanged cross-section as well as to place the operating electronic unit in the housing in a simpler way, by making use of a housing of novel design.
  • a further advantage of the invention is that by using a discharge tube supporting part of specific construction both the positioning of the discharge tube supporting part and the base supporting part relative to each other and also the mounting of the electronic unit as well as of the wire connecting this with the current conductors of the discharge tube can be carried out in an automated and safe way, since the board supports protruding from the discharge tube supporting part can provide the right position of the discharge tube supporting part during the automatic mounting process.
  • the discharge lamp 10 has a housing 17 composed of a base supporting part 18 and a discharge tube supporting part 21, as well as a screw base 16 fixed to the neck portion 18b of the base supporting part 18 and a discharge tube 11 connected to the discharge tube supporting part 21.
  • the discharge tube 11 is constructed of eight tube portions 11b aligned in essential parallel to each other and of bridging portions 11c connecting the corresponding tube portions 11b in a way to allow the passage of the discharge.
  • the multiple-bent discharge tube 11 produced in this way is stuck into the connection portion 21a of the discharge tube supporting part 21 of the housing 17 using a fixing material 15, e.g. a basing cement.
  • the discharge tube supporting part 21 is obviously provided with eight holes 21d - not seen in Fig. 1 - formed in the connection portion 21a.
  • the two end portions 11a provided with electrodes 12 of the discharge tube 11 and further six end portions 11a connected with bridging portions 11c are fitted into these holes 21d.
  • the electrodes 12 of the end portions 11a of the discharge tube 11 are connected to the support board 14a of electronic unit 14 for operating the discharge lamp 10 via current conductors 13.
  • the electronic unit 14 is placed in a cavity 20 surrounded by the base supporting part 18 and the discharge tube supporting part 21.
  • the joint between the base supporting part 18 and the discharge tube supporting part 21 - which two parts the housing 17 is composed of - is made by a fixing slot 21h formed in the outside surface 21f of the mantle 21b of the discharge tube supporting part 21 and running around that mantle 21b, and a shoulder 18c protruding from the wall 18a of the base supporting part 18 which shoulder 18c snaps into that slot 21h thus producing a shape-fit joint.
  • the secondary adapter members 19 placed in the base supporting part 18 and the primary adapter members 22 protruding from the discharge tube supporting part 21.
  • the secondary adapter members 19 are provided as slots formed in the wall 18a of the base supporting part 18, while the primary adapter members 22 protruding from the discharge tube supporting part 21 are lug-shaped extensions fitting into these slots.
  • the primary adapter members 22 have supporting extensions 23 for positioning and fixing the support board 14, protruding from the inside surface 21e of the mantle 21b of the discharge tube supporting part 21 and intruding into the cavity 20 of the housing 17 which supporting extensions 23 are formed as ribs 22b continuing on the inner side 22a of the primary adapter member 22.
  • the supporting extensions 23 that are in this case represented by the ribs 22b have longitudinal axes 23a being parallel to the axis 21g of the discharge tube supporting part 21, i.e. of the discharge lamp 10.
  • FIGs. 2 and 3 that portion of the base supporting part 18 and the discharge tube supporting part 21 is shown, which is in the neighborhood of the primary adapter member 22.
  • the magnified detail illustrates how the primary adapter member 22 of the discharge tube supporting part 21 and the secondary adapter member 19 of the base supporting part 18 are connected to each other.
  • the lug-shaped primary adapter member 22 protruding from the edge 21c of the mantle 21b of the discharge tube supporting part 21 exactly fits to the secondary adapter member 19 formed to have the shape of a slot and sunk into the wall 18a, of the base supporting part 18.
  • the primary adapter members 22 and the secondary adapter members 19 only set the proper relative position of the discharge tube supporting part 21 and the secondary adapter member 19.
  • the combination of the support shoulder 18c and the fixing slot 21h is used.
  • both the support shoulder 18c and the fixing slot 21h may have a different shape, moreover, they can be placed differently from that shown here. The only important point is to achieve a shape- or even pressed-fit joint between the two parts.
  • the supporting extension 23 that holds the support board 14a also forms a part of the primary adapter member 22.
  • the supporting extensions 23 are formed as two ribs 22b aligned parallel to each other and to the longitudinal axis 23a of the supporting extension 23.
  • the ribs 22b start at the inside surface 21e of the mantle 21b of the discharge tube supporting part 21 and run over the inner side 22a of the primary adapter member 22 to reach its end.
  • the support board 14a is placed in the space between the parallel aligned ribs 22b. Inserting the support board 14a is performed in a simple way by using the support shoulders 23b.
  • the support shoulders 23b are profiles - in this case hemispheres - protruding from the inner side 22a of the primary adapter member 22 and from the surface of the ribs 22b which faces the support board 14a. It is also obvious that the support shoulder 23b can have various shapes, e.g. a shoulder running along the rib 22b.
  • Figs. 4 and 5 show the discharge tube supporting part 21 of the low-pressure discharge lamp 10 according to the invention.
  • the two main portions of the discharge tube supporting part 21, the connection portion 21a having the holes 21d and the mantle 21b surrounding the connection portion 21a are clearly seen.
  • the number of the holes 21d is identical with the number of the tube members 11b which the discharge tube 11 of the discharge lamp 10 is composed of, as explained in connection with Fig. 1.
  • the number of the holes 21d is eight. Of these, except for two, three holes have the shape of an "eight curve" formed by eliminating the wall between two adjacent circular holes. It is also seen in Fig. 4 that reinforcing profiles 24 are placed between the holes 21d. These serve for making the walls being thin in themselves resistant to the load represented by the mass of the discharge tube 11.
  • introducing portions 23c are formed.
  • the introducing portions 23c have a slant surface with a slope towards the sleeve formed between the ribs 22b that produce the support extensions 23 and accepting the support board 14a. They serve to make easier the introduction of the support board 14a between the ribs 22b when automated assembling is used.
  • the multifunction primary adapter members 22 substantially reduce the number of parts and components needed to assemble the base supporting part 18 with the discharge tube supporting part 21 and to position and fix the electronic unit 14.
  • the design according to the invention can be well utilized to produce compact fluorescent lamps, in particular when versions with a discharge tube composed of six or even more tube members are involved.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
EP19940104992 1993-04-16 1994-03-30 Single-ended low-pressure discharge lamp Expired - Lifetime EP0622822B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
HU9301107A HU213603B (en) 1993-04-16 1993-04-16 Low-pressure discharge lamp with heading on one side
HU9301107 1993-04-16

Publications (2)

Publication Number Publication Date
EP0622822A1 EP0622822A1 (en) 1994-11-02
EP0622822B1 true EP0622822B1 (en) 1996-10-09

Family

ID=10983491

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940104992 Expired - Lifetime EP0622822B1 (en) 1993-04-16 1994-03-30 Single-ended low-pressure discharge lamp

Country Status (6)

Country Link
EP (1) EP0622822B1 (es)
JP (1) JPH076688A (es)
CA (1) CA2121288A1 (es)
DE (1) DE69400669T2 (es)
ES (1) ES2092348T3 (es)
HU (1) HU213603B (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
HU214536B (hu) * 1994-07-20 1998-03-30 Ge Lighting Tungsram Rt. Egyoldalon fejelt kisülőlámpa

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0349083B1 (en) * 1988-07-01 1994-01-05 Koninklijke Philips Electronics N.V. Electric lamp
DE4012684A1 (de) * 1990-04-20 1991-10-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Kompakte niederdruckentladungslampe
CA2076126A1 (en) * 1991-09-26 1993-03-27 Michael M. Minarczyk Compact discharge lamp having improved thermal management characteristics
ES2069955T3 (es) * 1991-10-25 1995-05-16 Tungsram Reszvenytarsasag Lampara de descarga de baja presion con un solo casquillo.

Also Published As

Publication number Publication date
JPH076688A (ja) 1995-01-10
DE69400669D1 (de) 1996-11-14
EP0622822A1 (en) 1994-11-02
DE69400669T2 (de) 1997-02-13
HU9301107D0 (en) 1993-08-30
ES2092348T3 (es) 1996-11-16
CA2121288A1 (en) 1994-10-17
HU213603B (en) 1997-08-28
HUT66511A (en) 1994-11-28

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