EP0847072B1 - Einseitig gesockelte Entladungslampe - Google Patents

Einseitig gesockelte Entladungslampe Download PDF

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Publication number
EP0847072B1
EP0847072B1 EP19970121434 EP97121434A EP0847072B1 EP 0847072 B1 EP0847072 B1 EP 0847072B1 EP 19970121434 EP19970121434 EP 19970121434 EP 97121434 A EP97121434 A EP 97121434A EP 0847072 B1 EP0847072 B1 EP 0847072B1
Authority
EP
European Patent Office
Prior art keywords
holder
burner
socket
discharge lamp
terminal type
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
EP19970121434
Other languages
English (en)
French (fr)
Other versions
EP0847072A2 (de
EP0847072A3 (de
Inventor
Isamu Sato
Tetsuya Kudo
Akihiko Tsurumaru
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.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
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 Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Publication of EP0847072A2 publication Critical patent/EP0847072A2/de
Publication of EP0847072A3 publication Critical patent/EP0847072A3/de
Application granted granted Critical
Publication of EP0847072B1 publication Critical patent/EP0847072B1/de
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
    • 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
    • H01J5/58—Means for fastening the separate part to the vessel, e.g. by cement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/34—Joining base to vessel

Definitions

  • the present invention relates to a discharge lamp, and more particularly to a discharge lamp of a single terminal type at one end of which a base is provided for purposes of using it as a light source for a head lamp of an automobile or a light source for an LED projector.
  • a prior single terminal type discharge lamp is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei.8-64114 corresponding to EP-A-0 696 046.
  • a burner is once attached to a self-core adjustment type holder member with a spherical outer surface, and then the holder member is inserted into a tubular socket. Thereafter the holder member and the socket are welded in a condition that the depth and the direction of the holder member are adjusted.
  • the manufacturing costs of the discharge lamp increase, because the necessity of two members, the holder member and the socket, as the base makes the construction of the lamp complicated and the necessity of two attachment steps consisting of the attachment between the burner and the holder member and the attachment between the holder member and the socket increases the number of total manufacturing steps.
  • a dielectric strength of the discharge lamp against a high voltage required on turning on the discharge lamp is insufficient, because the distance between lead wires respectively connected to two electrodes of the discharge lamp is too small in the socket due to the necessity of two connecting spaces in the socket for attaching the burner to the holder member and attaching the holder member to the socket.
  • a mechanical strength between the holder member and the socket of the discharge lamp is also insufficient, because the welding area of the holder member and the socket is small due to a linear contact between the holder member with a spherical outer surface and the socket.
  • the holder member would separate from the socket due to vibrations or impacts on driving an automobile.
  • the present invention provides a single terminal type discharge lamp comprising: a burner comprising a discharge tube and a covering tube; a thermoplastic socket attached to one end of the burner; a tubular holder, to which the burner is fitted, provided in the socket along a predetermined direction in which the burner is to be aligned; and a tubular metal holder spring which is mounted to the holder for radially depressing the holder toward the burner with deflecting force; wherein the burner is adhered to the socket due to the melt of the holder caused by the heat of the holder spring owing to radio-frequency heating which is performed when the one end of the burner is fitted to the holder such that the burner attains a predetermined position.
  • FIG. 1 is a partially exploded perspective view of a single terminal type discharge lamp of an embodiment according to the present invention.
  • FIG. 2 is a sectional view taken along the line A-A of FIG. 1.
  • FIG. 3 is a perspective view of the principal part of a single terminal type discharge lamp of an another embodiment according to the present invention.
  • reference numeral 1 is a single terminal type discharge lamp of one embodiment according to the present invention.
  • the single terminal type discharge lamp 1 is constructed such that a socket 3 made of a thermoplastic resin is attached by welding to one end of a burner 2 comprising a discharge tube 2a and a covering tube 2b, as well as the prior discharge lamp described above.
  • the holder 4 made of a thermoplastic resin is formed at the inside of the socket 3 and integrated with the socket 3 in one piece.
  • the holder 4 with a tubular shape is provided on the base 3a of the socket 3 along a predetermined direction in which the burner 2 is to be aligned such that the outer surface of the burner 2 faces the inner surface of the holder 4 when the burner 2 is fitted to the holder 4.
  • a tubular holder spring 5 having a deflecting force toward a direction for reducing the diameter thereof made of a metal member comprising a predetermined amount of, e.g., wolfram as a resistance component with elasticity of an appropriate value such as steel alloy products or spring products is mounted to the holder 4 to cover the outer surface of the holder 4.
  • the deflecting force of the holder spring 5 must not be so large, but it should be sufficient for reducing the diameter of the holder 4 in welding described later.
  • Reference numeral 7 in the figures is a lead wire provided on both ends of the burner 2.
  • Reference numeral 8 designates a ceramic plate for protecting the socket 3 from the heat of the burner 2 generated when it is turned on, and so on.
  • Reference numeral 9 designates a ceramic tube for insulating the lead wire 7 on the opposite side of the socket 3.
  • the central axis of the burner-2 is positioned at a designed position in the socket 3.
  • a discharge chamber 2c of the burner 2 can be placed at a predetermined position by adjusting the inserting depth of the burner 2 in the holder 4 on the basis of a flange 3b of the socket 3.
  • the burner 2 can freely slide in the holder 4, because the holder spring does not have a deflecting force enough to deform the shape of the holder 4, but enough to reduce the diameter of the holder 4.
  • the socket 3 is subject to radio-frequency heating while the discharge chamber 2c is maintained at the position. Then the holder spring 5 is heated by dielectric heating. A part of the holder 4 directly contacting the holder spring 5 is also heated due to thermal conduction from the holder spring 5.
  • the holder 4 made of the thermoplastic resin is softened and melted by the heating, and thus the diameter of the holder 4 is reduced by the deflecting force of the holder spring 5, thereby depressing the burner 2, allowing the burner 2 to be welded to the holder 4.
  • the holder 4 which is once softened and melted is again hardened, which in turn allows the burner 2 and the holder 4 to be fixed by welding.
  • the discharge lamp 1 since the discharge lamp 1 has a construction such that the holder 4 is provided on the base of the socket 3, it is possible to form the socket 3 and the holder 4 as an integrated body with the use of a mold or the like. Therefore, it is not necessary to provide the holder 4 as another parts, which in turn reducing the number of parts of the discharge lamp 1. It is also possible to reduce manufacturing steps, because a step for attaching the burner 2 to the holder 4 includes a step for attaching the burner 2 to the socket 3.
  • FIG. 3 Another embodiment of the present invention is shown in FIG. 3. While the burner 2 is fitted to or inserted into the holder such that the outer surface of the burner 2 faces the inner surface of the holder 4 in the foregoing embodiment, in the present embodiment, the holder 4 is fitted to or inserted into the burner 2 such that the outer surface of the holder 4 faces the inner surface of the burner 2.
  • a holder spring 6 has a deflecting force in a direction for increasing the diameter thereof or in a direction toward the burner 2.
  • the holder spring 6 is mounted on the inner surface of the holder 4.
  • the holder 4 is welded to the burner 2 by radio-frequency heating while the diameter of the holder 4 increases due to the deflecting force of the holder spring 6.
  • a single terminal type discharge lamp of the present invention comprising: a burner comprising a discharge tube and a covering tube; a thermoplastic socket attached to one end of the burner; a tubular holder, to which the burner is fitted, provided in the socket along a predetermined direction in which the burner is to be aligned; and a tubular metal holder spring which is mounted to the holder for radially depressing the holder toward the burner with deflecting force; wherein the burner-is adhered to the socket due to the melt of the holder caused by the heat of the holder spring owing to radio-frequency heating which is performed when the one end of the burner is fitted to the holder such that the burner attains a predetermined position, first, it is possible to reduce the number of parts of the discharge lamp and also the number of manufacturing steps, only one welding part being required in the present invention although two welding parts being required in the prior art, thereby providing an excellent effect for reducing costs of such a single terminal type discharge lamp.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Claims (4)

  1. Entladungslampe (1) mit einseitigem Anschluss, umfassend:
    einen Brenner (2), umfassend eine Entladungsröhre (2a) und eine Ummantelungsröhre (2b) ;
    einen thermoplastischen Sockel (3), der mit einem Ende des Brenners (2) verbunden ist;
    einen röhrenförmigen Halter (4), an dem der Brenner (2) befestigt ist, der im Sockel (3) entlang von einer vorbestimmten Richtung vorgesehen ist, in welcher der Brenner (2) ausgerichtet werden soll;
       dadurch gekennzeichnet, dass
       die Entladungslampe (1) mit einseitigem Anschluss weiter umfasst
       eine röhrenförmige Metall-Halterfeder (5; 6), die am Halter (4) angebracht ist, um den Halter (4) mit einer Auslenkkraft radial zum Brenner (2) hin zu drücken;
       bei welcher der Brenner (2) am Sockel (3) infolge des Schmelzens des Halters (4) angebacken wird, das durch die Wärme der Halterfeder (5; 6) aufgrund einer Radiofrequenzerwärmung hervorgerufen wird, die vorgenommen wird, wenn das eine Ende des Brenners (2) am Halter (4) befestigt wird, so dass der Brenner (2) in eine vorbestimmte Position gelangt.
  2. Entladungslampe (1) mit einseitigem Anschluss nach Anspruch 1, bei welcher der röhrenförmige Halter (4) mit dem thermoplastischen Sockel (3) als Einheit in einem Stück ausgebildet ist.
  3. Entladungslampe mit einseitigem Anschluss nach Anspruch 1 oder 2, bei welcher die Befestigung des Brenners (2) am Halter (4) derart ist, dass die äußere Oberfläche des Brenners (2) der inneren Oberfläche des Halters (4) gegenüberliegt.
  4. Entladungslampe mit einseitigem Anschluss nach Anspruch 1 oder 2, bei welcher die Befestigung am Brenner (2) im Halter (4) derart ist, dass die innere Oberfläche des Brenners (2) der äußeren Oberfläche des Halters (4) gegenüberliegt.
EP19970121434 1996-12-06 1997-12-05 Einseitig gesockelte Entladungslampe Expired - Lifetime EP0847072B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP32698796A JP2965920B2 (ja) 1996-12-06 1996-12-06 片端子型放電ランプ
JP326987/96 1996-12-06
JP32698796 1996-12-06

Publications (3)

Publication Number Publication Date
EP0847072A2 EP0847072A2 (de) 1998-06-10
EP0847072A3 EP0847072A3 (de) 1998-07-29
EP0847072B1 true EP0847072B1 (de) 2002-08-07

Family

ID=18194043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970121434 Expired - Lifetime EP0847072B1 (de) 1996-12-06 1997-12-05 Einseitig gesockelte Entladungslampe

Country Status (4)

Country Link
EP (1) EP0847072B1 (de)
JP (1) JP2965920B2 (de)
CA (1) CA2223378A1 (de)
DE (1) DE69714555T2 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3777034B2 (ja) * 1997-12-11 2006-05-24 株式会社小糸製作所 放電ランプ装置用絶縁プラグ
DE29800687U1 (de) * 1998-01-20 1999-05-20 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einseitig gesockelte Hochdruckentladungslampe
JP3922424B2 (ja) * 2000-07-25 2007-05-30 パイオニア株式会社 光学式記録媒体、光学式記録媒体製造装置及び光学式記録媒体製造方法
JP3717831B2 (ja) * 2001-10-12 2005-11-16 ソーラム株式会社 ランプ装置
JP4495689B2 (ja) 2006-03-30 2010-07-07 株式会社オーク製作所 ランプおよび光源装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57115745A (en) * 1981-01-09 1982-07-19 Toshiba Corp Manufacture of fluorescent lamp
EP0229430A3 (de) * 1986-01-10 1989-08-30 Koninklijke Philips Electronics N.V. Elektrische Lampe und Verfahren zur Herstellung dieser Lampe
EP0229429B1 (de) * 1986-01-10 1993-04-21 Koninklijke Philips Electronics N.V. Elektrische Lampe und Verfahren zur Herstellung dieser Lampe
US4795388A (en) * 1987-02-06 1989-01-03 Gte Products Corporation Method of making replaceable lamp unit for use in automobile headlight
US5291092A (en) * 1992-04-24 1994-03-01 Gte Products Corporation HID vehicle headlamp capsule assembly
DE4303594C2 (de) * 1993-02-08 1996-09-26 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zur Sockelung elektrischer Lampen
EP0618609B1 (de) * 1993-03-31 1996-10-30 Koninklijke Philips Electronics N.V. Elektrische Lampe
DE4427593A1 (de) * 1994-08-04 1996-02-08 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Einseitig gesockelte Hochdruckentladungslampe

Also Published As

Publication number Publication date
DE69714555T2 (de) 2003-05-22
EP0847072A2 (de) 1998-06-10
EP0847072A3 (de) 1998-07-29
JP2965920B2 (ja) 1999-10-18
DE69714555D1 (de) 2002-09-12
CA2223378A1 (en) 1998-06-06
JPH10172419A (ja) 1998-06-26

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