EP2772929A1 - Verfahren zur montage einer entladungslampe und entladungslampe - Google Patents

Verfahren zur montage einer entladungslampe und entladungslampe Download PDF

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Publication number
EP2772929A1
EP2772929A1 EP20120842935 EP12842935A EP2772929A1 EP 2772929 A1 EP2772929 A1 EP 2772929A1 EP 20120842935 EP20120842935 EP 20120842935 EP 12842935 A EP12842935 A EP 12842935A EP 2772929 A1 EP2772929 A1 EP 2772929A1
Authority
EP
European Patent Office
Prior art keywords
holding
discharge lamp
ring portion
burner
outer tube
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Withdrawn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
EP20120842935
Other languages
English (en)
French (fr)
Other versions
EP2772929A4 (de
Inventor
Makoto Deguchi
Shigehisa Kawatsuru
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.)
Toshiba Lighting and Technology Corp
Original Assignee
Toshiba Lighting and Technology Corp
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 Toshiba Lighting and Technology Corp filed Critical Toshiba Lighting and Technology Corp
Publication of EP2772929A1 publication Critical patent/EP2772929A1/de
Publication of EP2772929A4 publication Critical patent/EP2772929A4/de
Withdrawn legal-status Critical Current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
    • H01J5/48—Means forming part of the tube or lamp for the purpose of supporting it
    • 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

  • Embodiments according to the present invention relate to a method of assembling a discharge lamp and the discharge lamp.
  • a discharge lamp used for a head lamp of vehicles there is a known configuration in which a burner having a double-tube structure is held by a ring-shaped holder.
  • the burner is inserted inside the ring-shaped holder, and an outer tube of the burner is held by a plurality of holding pieces extending to a central axis side of the holder.
  • a discharge lamp with two different types of a light center length (LCL) standard and a method of assembling the same are to be provided by using a common burner and simplifying a structure.
  • LCL light center length
  • a method of assembling a discharge lamp which includes a burner including an inner tube including a light-emitting portion inside the inner tube, and an outer tube surrounding an outside of the inner tube; and a holder including a ring portion and a plurality of holding pieces.
  • the ring portion includes a first surface having a reference protrusion and a second surface opposite to the first surface.
  • the plurality of holding pieces extend from the ring portion to a central axis side of the ring portion.
  • the holder holds the outer tube of the burner that is inserted inside the ring portion with a tip portion of the holding piece.
  • a distance between a center of the light-emitting portion and the reference protrusion is changeable by selecting either one of a first holding position or a second holding position with respect to the one-type burner where a length of the inner tube and a length of the outer tube are made common with each other.
  • the holding piece is inclined to the first surface side at a first angle with respect to a diametral direction of the ring portion and the tip portion of the holding piece protrudes to the first surface side to hold the outer tube at the first holding position.
  • the holding piece is inclined to the second surface side at a second angle that is smaller than the first angle with respect to the diametral direction of the ring portion and the tip portion of the holding piece protrudes to the second surface side to hold the outer tube at the second holding position.
  • Fig. 1 is a perspective view of a discharge lamp 1a of the embodiment
  • Fig. 2 is a cross-sectional view of the discharge lamp 1a.
  • the discharge lamp 1a of the embodiment is a high intensity discharge (HID) lamp used for a head lamp of vehicles and includes a burner 10 and a holder 30.
  • HID high intensity discharge
  • the embodiment will be described as designating a direction of the arrow F illustrated in Fig. 2 to be a front end side which becomes the front when the discharge lamp 1a is attached to a vehicle and a direction of the arrow B in the opposite direction thereof to be a rear end side.
  • Fig. 3 is a perspective view of the burner 10 and the holder 30.
  • Fig. 4 is a cross-sectional view of the burner 10.
  • Fig. 5A is a plan view from the front end side of the burner 10 and the holder 30, and Fig. 5B is a plan view of a metal portion 41 of the holder 30.
  • the burner 10 can be held at a first holding position by the holder 30, and the same burner 10 can be held at a second holding position by the holder 30.
  • Figs. 1 to 3 illustrate the discharge lamp 1a with a second standard in which the burner 10 is held at the second holding position by the holder 30.
  • a structure of the burner 10 held at the first holding position is the same as that held at the second holding position.
  • the burner 10 has a double-tube structure including an inner tube 11 and an outer tube 12 that surrounds the outside of the inner tube 11.
  • the inner tube 11 is formed of a material such as quartz glass having light-transmitting property and thermal resistance.
  • a light-emitting portion 13 near the center of the inner tube 11 in a longitudinal direction (vertical direction in Fig. 4 ).
  • plate-shaped sealing portions 16 at the both of ends of the light-emitting portion 13.
  • cylinder portions 17a and 17b at ends on the opposite side of the light-emitting portion 13 in the sealing portions 16.
  • the light-emitting portion 13, the sealing portions 16, and the cylinder portions 17a and 17b are integrally connected.
  • the discharge medium 14 includes metal halide and a rare gas but does not include mercury so as to be a so-called mercury-free medium.
  • Electrode mounts 21 are sealed in each of the sealing portions 16. As illustrated in Fig. 3 as well, the electrode mount 21 includes an electrode 22, a coil 23, a metal foil 24, and a lead wire 25.
  • each of the pair of electrodes 22 faces each other inside the discharge space 14 as maintaining a predetermined distance between the electrodes.
  • the coil 23 is wound around the electrode 22.
  • the metal foil 24 connects the electrode 22 and the lead wire 25.
  • An end portion of each of the pair of lead wires 25 extends to the outside of the inner tube 11.
  • the lead wire 25 extending to the front end side of the burner 10 is connected with an end of a support wire 26 by laser welding, for example. That is, one of the pair of electrodes 22 facing the discharge space 14 is electrically connected to the support wire 26 through the electrode mount 21.
  • a sleeve 27 formed of ceramic, for example, is mounted at a portion extending in parallel to a tube axis of a double-tube of the burner 10.
  • the other of the pair of electrodes 22 is electrically connected to the lead wire 25 extending from the electrode mount 21 to the rear end side.
  • the cylindrical-shaped outer tube 12 is provided concentrically with the inner tube 11 outside the inner tube 11.
  • the outer tube 12 is welded in the vicinity of the cylinder portions 17a and 17b of the inner tube 11.
  • a hermetically-sealed space 15 is formed between the inner tube 11 and the outer tube 12.
  • a one-type gas or a mixed gas selected from neon, argon, xenon, and nitrogen is sealed in the space 15, for example.
  • a material of the outer tube 12 be a material the thermal expansion coefficient of which is close to that of the inner tube 11 and which has a property of ultraviolet rays screening such as titanium, cerium, and quartz glass to which an oxide such as aluminum is added, for example.
  • a pressure of the gas sealed in the inner space 15 of the outer tube 12 is lower than a gas pressure inside the discharge space 14 of the inner tube 11. Therefore, dielectric barrier discharge occurs in the inner space 15 of the outer tube 12 when starting lighting, thereby being spared from a dielectric breakdown. That is, it is possible to securely perform the light-emitting at a comparatively low discharge starting voltage.
  • a metal band 55 illustrated in Figs. 1 to 3 is mounted on a farther rear end side than a light-emitting portion 13.
  • the both of ends of the ring-shaped metal band 55 are welded to each other, and the metal band 55 is fixed on an outer peripheral surface of the outer tube 12.
  • the holder 30 has a configuration in which a resin portion 31 and the metal portion 41 are assembled.
  • the resin portion 31 has a ring portion 35 that is provided on an outer edge side of the holder 30.
  • the ring portion 35 has a first surface and a second surface on the opposite side thereof. The first surface faces the front end side of the discharge lamp 1a and the second surface faces the rear end side of the discharge lamp 1a.
  • a reference protrusion 33 protruding to the front end side on the first surface of the ring portion 35.
  • a distance (D2 in Fig. 2 ) from a tip of the reference protrusion 33 to the center between the electrodes inside the light-emitting portion 13 is defined as a light center length (LCL) of the discharge lamp.
  • Three outer peripheral side notches 32 are formed on an outer peripheral side of the ring portion 35, for example.
  • Six inner peripheral side notches 34 are formed on an inner peripheral side of the ring portion 35, for example.
  • the metal portion 41 of the holder 30 is a metal plate formed of stainless steel, for example. A portion of an outer peripheral side of the metal portion 41 is embedded in the resin portion 31 so that the metal portion 41 and the resin portion 31 are integrated with each other.
  • Fig. 5B illustrates a planar shape of the metal portion 41 before being assembled with the resin portion 31.
  • the metal portion 41 can be formed by punching a metal plate, for example.
  • Fig. 5B illustrates a state in a plate shape after the punching and illustrates a state before bending is performed for the holding piece 43.
  • the metal portion 41 has a ring portion 42 and a plurality of holding pieces 43 extending from the ring portion 42 to the central axis side of the ring portion 42.
  • holding pieces 43 there are provided four holding pieces 43 at an interval of 90° on the ring portion 42 in the peripheral direction.
  • a sleeve holding portion 44 on an inner peripheral side of the ring portion 42. There is provided the sleeve holding portion 44 between the holding pieces 43 that are adjacent to each other in the peripheral direction. A through hole 44a is formed in the sleeve holding portion 44, and the sleeve 27 of the burner 10 is inserted through the through hole 44a.
  • Three notches 45 are formed on an outer peripheral side of the ring portion 42, for example.
  • the notch 45 of the ring portion 42 of the metal portion 41 and the outer peripheral side notch 32 of the ring portion 35 of the resin portion 31 coincide with each other at a position in the peripheral direction, thereby assembling the metal portion 41 and the resin portion 31.
  • Six slits 46 penetrating a front and a back of the ring portion 42 are formed in the ring portion 42 of the metal portion 41.
  • the slit 46 and the inner peripheral side notch 34 formed on the resin portion 31 coincide with each other at a position in the peripheral direction, thereby assembling the metal portion 41 and the resin portion 31.
  • the burner 10 is inserted inside the ring portion 42 of the metal portion 41 and held by the plurality of holding pieces 43 (four in the embodiment) .
  • the burner 10 is held at the center position of the ring portion 42 in a state of being separated away from the ring portion 42.
  • the burner 10 is held in a posture having the tube axis be in parallel to the central axis of the ring portion 42.
  • Fig. 11B is a schematic cross-sectional view illustrating one of the sampled holding pieces 43.
  • the ring portion 42 has a first surface 42a and a second surface 42b on the opposite side thereof.
  • the first surface 42a faces the front end side and the second surface 42b faces the rear end side.
  • a base portion of the ring portion 42 side in the holding piece 43 is bent toward the rear end side. That is, the holding piece 43 is inclined to the second surface 42b side with respect to the ring portion 42 in a diametric direction d, and a tip portion 43a of a holding portion 43 protrudes to the second surface 42b side. Furthermore, the tip portion 43a of the holding portion 43 is bent toward the rear end side and bonded by the laser welding with respect to the metal band 55, for example.
  • the burner 10 is held at the second holding position by the holder 30.
  • the metal band 55 that becomes a portion to be supported by the holding piece 43 in the burner 10 is positioned on a farther rear end side than the holder 30.
  • the LCL (D2 in Fig. 2 ) is 18.0 mm, for example.
  • the holding piece 43 is inclined to the second surface 42b side at a second angle ⁇ with respect to the ring portion 42 in the diametric direction d, and the tip portion 43a of the holding piece 43 is bonded to the metal band 55 on a farther rear end side than the second surface 42b.
  • the second angle ⁇ is 40°, for example.
  • a distance L2 between a base end portion 43b of the holding piece 43 embedded in the ring portion 42 and a bonding portion of the tip portion 43a and the metal band 55 is shorter than a corresponding distance L1 in a case of the first holding position described below.
  • the base 50 is, for example, formed of an electrically conductive material and as illustrated in Fig. 6 , includes a housing 51 and a ring 52.
  • a lighting circuit (not illustrated) and the like for starting and stably lighting the discharge lamp 1a are accommodated inside the housing 51.
  • An end of the lead wire 25 extending to the rear end side and an end of the support wire 26 illustrated in Fig. 2 are connected to an end of the lighting circuit.
  • an opening 54 that leads to the inside of the housing 51 is formed in an front end portion of the housing 51, and there is provided the ring 52 on a peripheral edge portion of the opening 54.
  • protruding portions 53 are inserted into the slits 46 of the metal portion 41 of the holder 30 illustrated in Figs. 3 and 5(b) from the second surface side. As illustrated in Figs. 1 and 5(a) , the protruding portions 53 are bent toward the outer peripheral side of the holder 30. The bent protruding portions 53 are accommodated in the inner peripheral side notches 34 of the resin portion 31.
  • the holder 30 is attached to the base 50.
  • An overlapping portion of the bent protruding portion 53 and the metal portion 41 may be laser-welded, thereby bonding the protruding portion 53 to the metal portion 41. Otherwise, after inserting the protruding portion 53 into the slit 46, the protruding portion 53 may be bonded to the metal portion 41 by the welding without being bent.
  • the discharge lamp is attached to a reflector 60.
  • Every reflector 60 has a neck portion 61 having a hollow structure and a reflecting portion 62.
  • a step difference is formed on an inner wall of the neck portion 61 on the rear end side, and there is provided an attachment surface 63 to which the holder 30 of the discharge lamp is attached on the rear end side of the neck portion 61.
  • the attachment surface 63 is formed in an annular shape.
  • engagement pieces 64 for example, on an inner peripheral wall of the neck portion 61 on a farther rear end side than the attachment surface 63.
  • the reflecting portion 62 on the front end side of the neck portion 61 being connected to the neck portion 61.
  • a lens holder 71 on a front end of the reflecting portion 62, and the lens holder 71 holds a lens 72.
  • the burner 10 is inserted into the reflector 60 from the rear end side of the neck portion 61, thereby causing the first surface of the holder 30 to face the attachment surface 63.
  • the notch 32 of the holder 30 and the engagement piece 64 coincide with each other at a position in the peripheral direction, thereby bringing the reference protrusion 33 into contact with the attachment surface 63.
  • the whole base 50 of the discharge lamp is rotated with respect to the attachment surface 63, thereby interposing the resin portion 31 of the holder 30 between the attachment surface 63 and the engagement piece 64. Accordingly, the discharge lamp is fixed to the reflector 60.
  • the burner 10 described above is held at the second holding position by the holder 30.
  • the bending direction of the holding piece 43 in the holder 30 is set to be in the opposite direction of the second holding position, and thus, it is possible to hold the burner 10 at the first holding position.
  • Fig. 8 is a perspective view of a discharge lamp 1b with a first standard in which the burner 10 is held at the first holding position by the holder 30.
  • Fig. 9 is a cross-sectional view thereof.
  • Fig. 10 is a perspective view of those burner 10 and holder 30.
  • Fig. 11A is a schematic cross-sectional view of one of the holding pieces 43 that holds the burner 10 at the first holding position being sampled and illustrated.
  • the burner 10 is inserted into an inner side of the ring portion 42 of the metal portion 41, and held by four holding pieces 43.
  • the burner 10 is held in a state of being separated away from the ring portion 42 at the center position of the ring portion 42.
  • the burner 10 is held in the posture having the tube axis be in parallel to the central axis of the ring portion 42.
  • the base portion of the ring portion 42 side in the holding piece 43 is bent toward the front end side that is the opposite side of the second holding position. That is, as illustrated in Fig. 11A , the holding piece 43 is inclined to the first surface 42a side with respect to the ring portion 42 in the diametric direction d, and the tip portion 43a of the holding portion 43 protrudes to the first surface 42a side. Furthermore, the tip portion 43a of the holding portion 43 is bent toward the front end side and bonded by the laser welding with respect to the metal band 55, for example.
  • the metal band 55 that becomes a portion to be supported by the holding piece 43 in the burner 10 is positioned on a farther front end side than the holder 30.
  • the LCL (D1 in Fig. 9 ) is 27.1 mm, for example.
  • the holding piece 43 is inclined to the first surface 42a side at a first angle ⁇ with respect to the ring portion 42 in the diametric direction d, and the tip portion 43a of the holding piece 43 is bonded to the metal band 55 on a farther front end side than the first surface 42a.
  • the first angle ⁇ is 55°, for example, which is larger than the second angle ⁇ in the case of the above-described second holding position.
  • the distance L1 between the base end portion 43b of the holding piece 43 embedded in the ring portion 42 and the bonding portion of the tip portion 43a and the metal band 55 is 5 to 6 mm, for example, which is longer than the distance L2 in the case of the second holding position described above.
  • This discharge lamp 1b also can be attached to the attachment surface 63 of the reflector 60 as similar to the above-described discharge lamp 1a.
  • At least the burner 10 is the same in configuration and size.
  • the discharge lamp 1a and the discharge lamp 1b differ depending on whether the burner 10 is held at the first holding position or at the second holding position by the holder 30.
  • the LCL of the discharge lamp 1a (D2 in Fig. 2 ) and the LCL of the discharge lamp 1b (D1 in Fig. 9 ) differ from each other.
  • the bending direction (protruding direction) of the holding piece 43 is reversed, it is possible to select either the first holding position or the second holding position. Then, in accordance with the difference of the holding position, it is possible to change the distance (LCL) between the center of the light-emitting portion 13 and the reference protrusion 33. That is, while using the one-type burner 10 the structure and the size of which are made common, it is possible to select and assemble the discharge lamp with two different types of the LCL standard by simply reversing the bending direction of the holding piece 43.
  • the length and the thickness of the inner tube 11 are the same.
  • the metal band 55 is mounted at the same position on the outer tube 12 in the longitudinal direction. That is, at the first holding position and the second holding position, the tip portion of the holding piece 43 holds the same position of the outer tube 12 in the longitudinal direction.
  • the length of the sleeve 27 is the same as each other.
  • the length of the support wire 26 may be the same as or different from each other in the discharge lamp 1b and the discharge lamp 1a.
  • the length of the lead wire 25 also may be the same as or different from each other in the discharge lamp 1b and the discharge lamp 1a.
  • efficiency in manufacturing and a reduction in costs can be achieved by making components common such as using the burner 10 of the same type and the same standard. That is, there is no need to individually manufacture or prepare burners in accordance with the difference of the LCL. It is possible to easily manage either of the discharge lamps in two different types of LCL standard by making the burner 10 common and processing the holding piece 43. As a result, it is possible to provide an inexpensive discharge lamp.
  • the LCL of which is 27.1 mm illustrated in Figs. 8 to 10 even if the holding piece 43 is simply bent toward the rear end side to hold the burner 10, it is not possible to set the LCL to be 18.0 mm.
  • the bent angle (inclined angle) ⁇ of the holding piece 43 when being at the second holding position is set to be smaller than the bent angle (inclined angle) ⁇ of the holding piece 43 when being at the first holding position.
  • the metal portion 41 of the holder 30 by punching a sheet of metal plate, for example. Accordingly, as illustrated in Fig. 5B , the plurality of holding pieces 43 can be integrally molded, and thus, it is possible to reduce the number of components.
  • the holder 30 may be configured only of a metal.
  • the structure of the holder 30 does not have to be completely the same.
  • a holder 80 illustrated in Fig. 12 has the ring-shaped resin portion 82 and a plurality of holding pieces 81 one end portion of which is embedded in the resin portion 82 and the other end portion (tip portion) of which extends toward the metal band 55 to be bonded thereto.
  • a sleeve holding portion 83 on an inner peripheral side of the resin portion 82 in the holder 80.
  • a base 91 may be a socket-type that has no lighting circuit therein.

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)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP12842935.4A 2011-10-24 2012-03-05 Verfahren zur montage einer entladungslampe und entladungslampe Withdrawn EP2772929A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011232545A JP5884404B2 (ja) 2011-10-24 2011-10-24 放電ランプの組立方法及び放電ランプ
PCT/JP2012/055603 WO2013061632A1 (ja) 2011-10-24 2012-03-05 放電ランプの組立方法及び放電ランプ

Publications (2)

Publication Number Publication Date
EP2772929A1 true EP2772929A1 (de) 2014-09-03
EP2772929A4 EP2772929A4 (de) 2015-06-03

Family

ID=48167479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12842935.4A Withdrawn EP2772929A4 (de) 2011-10-24 2012-03-05 Verfahren zur montage einer entladungslampe und entladungslampe

Country Status (4)

Country Link
EP (1) EP2772929A4 (de)
JP (1) JP5884404B2 (de)
CN (1) CN103890894B (de)
WO (1) WO2013061632A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018002056A1 (en) * 2016-06-27 2018-01-04 Xylem Ip Management S.À R.L. Quartz sleeve support for an uv-lamp

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202563A1 (de) * 2016-02-19 2017-08-24 Osram Gmbh Retrofit-lampe und fahrzeugscheinwerfer mit retrofit-lampe

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19845190A1 (de) * 1998-09-30 2000-04-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Elektrische Lampe
WO2003005399A1 (en) * 2001-07-06 2003-01-16 Koninklijke Philips Electronics N.V. Lamp, in particular for automotive headlights
JP4158613B2 (ja) * 2003-06-19 2008-10-01 市光工業株式会社 車両用放電灯
DE102006058887B4 (de) * 2006-12-13 2019-01-17 Osram Gmbh Verfahren zum Haltern von Lampengefäßen
JP5428957B2 (ja) * 2009-05-13 2014-02-26 東芝ライテック株式会社 車両用放電ランプ、および車両用放電ランプ装置
JP5612100B2 (ja) * 2009-09-18 2014-10-22 コーニンクレッカ フィリップス エヌ ヴェ 放電ランプのバーナーを固定する器具
WO2012056787A1 (ja) * 2010-10-25 2012-05-03 ハリソン東芝ライティング株式会社 放電ランプおよび放電ランプ装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018002056A1 (en) * 2016-06-27 2018-01-04 Xylem Ip Management S.À R.L. Quartz sleeve support for an uv-lamp
EP3263529B1 (de) * 2016-06-27 2019-11-06 Xylem Europe GmbH Quarzhülsenträger einer uv-lampe
US10974974B2 (en) 2016-06-27 2021-04-13 Xylem Ip Management S.À R.L. Quartz sleeve support for a UV-lamp

Also Published As

Publication number Publication date
CN103890894A (zh) 2014-06-25
CN103890894B (zh) 2016-09-28
JP5884404B2 (ja) 2016-03-15
JP2013089587A (ja) 2013-05-13
EP2772929A4 (de) 2015-06-03
WO2013061632A1 (ja) 2013-05-02

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