EP2457246A2 - Entladungslampe und verfahren zur herstellung einer derartigen entladungslampe - Google Patents
Entladungslampe und verfahren zur herstellung einer derartigen entladungslampeInfo
- Publication number
- EP2457246A2 EP2457246A2 EP10728183A EP10728183A EP2457246A2 EP 2457246 A2 EP2457246 A2 EP 2457246A2 EP 10728183 A EP10728183 A EP 10728183A EP 10728183 A EP10728183 A EP 10728183A EP 2457246 A2 EP2457246 A2 EP 2457246A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- welding
- discharge lamp
- fastening tab
- approximately
- 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.)
- Granted
Links
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
- 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
-
- 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
- H01J9/30—Manufacture of bases
Definitions
- Discharge lamp and method for producing such a discharge lamp are Discharge lamp and method for producing such a discharge lamp
- the invention is based on a discharge lamp, in particular a D-lamp, according to the preamble of patent claim 1 and its manufacturing method according to the preamble of patent claim 11.
- the document DE 10 2006 042 178 A1 discloses such a discharge lamp which is used in a vehicle headlight.
- This has a lamp cap with an approximately circular cross-section having recess in which a lamp bulb is inserted in sections.
- the described discharge lamp is exposed, inter alia, to a load transversely to a lamp longitudinal axis, for example due to vibrations or shocks.
- this can also lead to high plastic deformations of the welding point between the fastening straps and the metal clamp, the clamping of the fastening sheets or the fastening straps of the discharge lamp.
- the plastic deformations result in a deterioration in the performance of the discharge lamp due to a misalignment of the lamp bulb relative to the lamp cap.
- Such discharge lamps must not exceed certain limit values in the case of a bulb deflection test according to IEC standard 60810 shown in FIG. 1 of this document.
- the lamp base is firmly clamped and the lamp bulb in the longitudinal direction approximately centrally applied with a transverse force of 18 N.
- the lamp bulb is located approximately diametrically opposite to a force application point of the lateral force a measuring point, which may be spaced a maximum of 0.13 mm from its original position after relieving the lamp bulb.
- the object of the present invention is firstly to provide a discharge lamp which has low plastic deformation under external loads and secondly to provide a production method for such a discharge lamp which has low manufacturing and production costs and corresponds to high quality standards.
- the discharge lamp according to the invention which is in particular a D-lamp, has a lamp bulb supported by a lamp base. From the lamp base four four evenly about a lamp longitudinal axis offset from each other arranged metallic mounting straps. These are welded to the lamp base firmly embracing metal clip. Each fastening tab has a holding section and a subsequent welding section.
- a welding cross-section in a connection plane lying between the metal clamp and the welding section has an area of at least 0.5 mm 2 and / or the holding section has at least one recess and / or a pinch end of the lamp bulb which is at least partially immersed in the lamp cap is so from an inner wall of the Lamp bulb spaced that at a deflection of the lamp bulb with respect to a lamp base longitudinal axis with this one edge abuts the inner wall for relief approximately.
- a recess of the holding portion is formed as a through hole between longitudinal edges and the fastening tab and / or in the form of a groove in one or each of the longitudinal edges.
- the holding portion of the respective fastening tab is angled towards the lamp longitudinal axis and the welding portion extends away from the lamp base in the direction of the lamp longitudinal axis.
- the longitudinal edges of each fastening tab are in each case substantially in a plane, the planes being approximately parallel to one another and to the lamp longitudinal axis.
- the through-hole has substantially the shape of a rectangle, wherein inner longitudinal edges of the through-hole extend approximately parallel to the longitudinal edges of the fastening tab and have a greater length than inner transverse edges of the through-hole, and this is arranged approximately centrally in the fastening tab, thus totaling a homogeneous Course of mechanical stresses is achieved.
- the through hole is formed substantially triangular.
- an inner transverse edge of the through-hole extends approximately transversely to the longitudinal edges of the fastening tab, and two inner longitudinal edges of the through-hole each have approximately the same angle of attack to the respectively adjacent longitudinal edge of the fastening tab, the two inner longitudinal edges each having a greater length than the inner transverse edge. This leads advantageously to a uniform mechanical stress distribution.
- the transverse edge of the triangular through-hole is arranged adjacent to the transition region between the holding section and the welding section of the fastening strap.
- the recesses are introduced as grooves, then these are preferably arranged symmetrically to each other, whereby a homogeneous voltage profile is achieved.
- a groove has in each case a groove longitudinal edge and two bevelled edges obliquely to the groove longitudinal edge.
- the welding portion may be formed approximately circular or elongated and extends in the latter case substantially transversely to the lamp longitudinal axis.
- the metal clip has a thickness of about 0.3 to 0.6 mm and a width of 4 to 7 mm and each fastening tab has a thickness of 0.2 to 0.5 mm and a width of 3 to 6 mm.
- the edge between an end face and an outer circumferential surface of the crimping end is formed.
- a radial distance of the edge from the inner wall is preferably less than 1 mm and a distance between the edge and the welded portion is advantageously 10 to 25 mm.
- the welding section of a respective fastening tab is connected to the metal clamp by laser welding.
- the laser welding is preferably carried out with single-pulse welding, with spot seam welding, with line seam welding, with welding with line focus or with welding with a bi-focal optics or trim spot optics.
- FIG. 1 is a schematic representation of a BuIb-Deflections test
- FIG. 2 is a perspective view of a discharge lamp according to a first embodiment
- FIG. 3 is a schematic representation of a welded joint between a fastening tab and a metal clip of a lamp envelope according to the exemplary embodiment; 4 is a perspective view of the discharge lamp according to a second embodiment;
- FIG. 5 is a perspective view of the discharge lamp according to a third embodiment
- 6a-6d show a schematic representation of different embodiments of a melt of the weld between the fastening tab and the metal clip
- FIG. 7 is a longitudinal sectional view of the discharge lamp according to a fourth embodiment.
- FIG. 2 shows a perspective view of a discharge lamp 1 according to a first exemplary embodiment.
- This is a high-pressure discharge lamp which can be used as a D-lamp, in particular as a Dl, D2, D3 or D4 lamp in a vehicle headlight of a vehicle.
- the discharge lamp 1 has a lamp bulb 4 made of quartz glass held by a multipart lamp base 2 and having electrodes arranged therein for generating a gas discharge.
- the lamp base 2 is constructed essentially in the shape of a parallelepiped with a pedestal base and base top 6, 8. In an upper side 12 of the upper base part 8, an approximately cylindrical base element 10 is inserted, through which the lamp bulb 4 is held.
- the base element 10 has an annular web 14 extending away from the upper side 12, on which a retaining ring 16 is formed as part of a bayonet closure for fixing the discharge lamp 1, for example in a vehicle headlight.
- the annular web 14 and the retaining ring 16 engage around an approximately cylindrical recess 18 of the base element 10, in which the lamp bulb 4 is partially immersed.
- the lamp bulb 4 has an approximately circular cylindrical main body 20 with two multi-radially stepped back end portions 22, 24. A lying adjacent to the lamp base 2 end portion 26 of the main body 20 of the lamp envelope 4 is firmly encompassed with a metal clip 28, which projects with four protruding from the lamp cap 2 Fastening tabs 30 is welded to hold the lamp bulb 4.
- the fastening straps 30 project from the base element 10 approximately from an inner edge 32 of the retaining ring 16 located at the top in FIG.
- the four Befest Trentsla- see 30 are evenly distributed around a lamp longitudinal axis 34 around (4). With a fixation section not visible in FIG. 2, the fastening straps 30 are firmly embedded in the base element 10.
- the projecting part of the fastening tabs 30 has a holding section 36 which is angled toward the longitudinal axis of the lamp 34 and subsequently has a welding section 38 extending approximately parallel to the lamp longitudinal axis 34.
- the attachment tabs 30 are then welded to the metal bracket 28 via the weld portion 38, respectively.
- the welding portion 38 is slightly curved, whereby a surface facing the metal bracket 28 is convex and a repellent surface is concave, so that an end portion 40 of the welding portion 38 extends away from the lamp base 2 and the lamp longitudinal axis 34, and the lamp bulb 4 during assembly at the weld portions 38 can easily slide off.
- the metal clip 28 has two fixed hinges 42, one of which can be seen in FIG. 2, which are formed as approximately cylindrical protrusions with an axis parallel to the lamp longitudinal axis 34.
- the fixed hinges 42 are offset relative to each other with respect to the lamp longitudinal axis 34 by 90 ° and arranged in the mounted state of the lamp bulb 4 between two fastening tabs 30.
- tabs formed on one end section of the metal clip 28 and directed away from the lamp bulb 4 are provided, which are welded together, which is not shown in FIG.
- the tabs, not shown, are formed approximately opposite to the illustrated fixed hinge 42 on the metal bracket 28 and arranged correspondingly between two fastening tabs 30.
- a power supply 44 insulated in sections from the lamp base 2 extends along the lamp envelope 4 for contacting an electrode 46 of the discharge lamp 1
- the welding sections 38 of the attachment tabs 30 are welded together with the metal clip 28 via a laser welding process, which is explained in more detail in FIG.
- FIG. 3 shows the welding of the weld section 38 of the fastening tab 30 from FIG. 2 to FIG Metal bracket 28 shown schematically according to the first embodiment.
- the laser welding takes place by means of single-pulse welding, with a laser beam impinging on an engagement surface 48 facing away from the lamp bulb 4, see FIGS. 2 and 3, whereby a mushroom-shaped melt 50, as shown in FIG.
- the melt 50 is shown in FIG. 3 in a section. This extends through the entire thickness of the welding section 38 and a part of the thickness of the metal clip 28.
- a welding cross-section 52 which lies in a connecting plane 53 between the welding section 38 and the metal clip 28, has an area of at least 0.5 mm 2 .
- the highest stresses occur in the region of the weld cross section 52. From an area larger than 0.5 mm 2 , the voltages are lowered significantly, for example, in a bulb deflection test or under conditions of use of the discharge lamp, whereby the plastic deformation is greatly reduced and the elastic deformation is increased. A yield point of the weld is essentially no longer achieved here.
- Each fastening tab 30 has two longitudinal edges 54, 56, each lying in a plane which extend approximately parallel to each other and to the lamp longitudinal axis 34.
- Holding portion 36 of each fastening tab 30 is centrally introduced an approximately rectangular through-hole 58.
- Inner longitudinal edges 60 of the through-hole 58 extend approximately parallel to the longitudinal edges 54, 56 of the fastening tab 30 and are slightly longer than the inner transverse edges 62 of the through-hole 58.
- the through-holes 58 are produced, for example, by the stamping method.
- the rigidity, in particular the mechanical torsional and bending stiffness, of the fastening straps 30 is reduced and the welding between the metal clamp 28 and the fastening straps 30 is relieved with low production outlay. This leads to a reduction of the plastic deformation of the discharge lamp 1. Further embodiments of the fastening tabs 30 are shown in the following FIGS. 4 and 5.
- Figure 4 discloses a perspective view of the discharge lamp 1 according to a second embodiment.
- the fastening tabs 30 have a different configuration than in the first exemplary embodiment.
- the through-hole 58 is triangular in this case, wherein an inner transverse edge 64 extends approximately transversely to the longitudinal edges 54, 56 of the fastening tab 30 and two inner longitudinal edges 66 are each formed at an angle to the longitudinal edges 54, 56.
- the inner longitudinal edges 66 have a greater length than the inner transverse edge 64. This is arranged approximately adjacent to the welding portion 38 of the fastening tab 30.
- Such a through hole 58 results in loads of the discharge lamp 1 to a homogeneous mechanical stress distribution.
- Figure 5 illustrates the discharge lamp 1 in a perspective view according to a third embodiment, in which the mounting tabs 30 instead of a through hole 58 as in Figures 2 and 4, grooves 68, 70 have.
- the grooves 68 and 70 are respectively inserted from the longitudinal edges 54 and 56 into each fastening tab 30. These then each have an approximately parallel to the longitudinal edges 54, 56 of the fastening tab 30 extending groove longitudinal edge 72 and two obtuse angled to the respective groove longitudinal edge 72 inclined edges 74th
- FIGS. 6 a to 6 d show, in a greatly simplified illustration, different melts 50 (of different laser welding methods), which, as shown in FIG. 3, are formed between the welding section 38 of the fastening tab 30 and the metal clip 28.
- FIG. 6a schematically shows the melt 50 of the laser welding method with spot seam welding, wherein a laser beam 76 is indicated.
- individual spatially offset laser pulses in this case five, are emitted, whereby a plurality of overlapping mushroom-shaped melts 50 are formed, which lead to a total melt 50 which extends approximately transversely to the lamp longitudinal axis 34 from FIG.
- Figure 6c discloses the laser welding method with line seam welding, wherein here the indicated laser beam 76 moves in the direction of the arrow 78, whereby a elongated melt 50 is formed, which extends transversely to the lamp longitudinal axis 34 of Figure 2.
- FIG. 6 d illustrates another laser welding method in which the laser beam is directed with a line focus, whereby an elongate melt 50 arranged transversely to the lamp longitudinal axis 34 from FIG. 2 is formed.
- FIG. 7 shows a longitudinal section view of the discharge lamp 1 according to a fourth exemplary embodiment.
- the lamp bulb 4 is supported in addition to the mounting tabs 30 at a deflection to the lamp longitudinal axis 34 through the lamp base, which is explained below.
- the lamp bulb 4 has, according to FIG. 7, an outer bulb 80 which is firmly gripped by the metal clamp 28.
- FIG. 7 also shows a pinch end 84 extending away from the discharge vessel (not shown) and receiving a current supply 82. This is welded to the outer bulb 80 and immersed in the base member 10 sections.
- a second crimping end, not shown in FIG. 7, extends diametrically from the first squeezing end 84.
- the insulated power supply 44 of the lamp bulb 4 dips into an approximately hollow-cylindrical power supply receptacle 88 formed on an inner wall 86 of the recess 18 of the lamp cap 2. This has a contacting 90 for the power supply 44 at its end facing away from the lamp bulb 4 end.
- the base element 10 is stepped back radially at its end portion 92 facing away from the lamp bulb 4.
- the annular and an L-shaped cross-section having contact 90 firmly engages around the end portion 92 and is embedded in sections in an annular end face 94 formed by the downgrading.
- From the end portion 92 of the base member 10 projects an approximately cup-shaped pinch end 96 in the recess 18 of the base member 10 in the direction of the lamp base 4 inside.
- the pinch end receptacle 96 is formed substantially coaxially with the lamp longitudinal axis 34 and has a slightly towards the end portion 92 of the base member 10 towards tapered inner wall 98.
- the squeezing end 84 of the lamp envelope 4 is partially immersed, wherein the power supply 82 by a in a Bottom portion 100 of the crimp receiving 96 formed through opening 100 extends therethrough.
- a recess 104 pointing away from the lamp bulb 4 is introduced into the end section 92, whereby a journal 106 is formed.
- the pin 106 is firmly embraced by a sleeve-shaped contact 108, which is contacted with the power supply 82.
- the squeezing end 84 of the lamp bulb 4 is slightly spaced from the bottom region 100 of the squeeze end receptacle 96 with an end face 110.
- An edge 112 of the crimping 84 which is formed in the transition region between an outer circumferential surface 114 and the end face 110 of the crimping end 84, is at a radial distance b from the inner wall 98 of the pinch end 96 spaced.
- the distance b is preferably less than 1 mm.
- the deflection of the lamp bulb 4 with respect to the longitudinal axis of the lamp 34 is limited by the pinch end receptacle 96 by abutment of the edge 112 of the crimp end 84 against the inner wall 98 of the crimp end receptacle 96, thereby avoiding plastic deformation.
- a distance a such as between the welding portion 38 and the edge 112 - parallel to the lamp longitudinal axis 34 - in size between about 15-20 mm is advantageous to support the edge 112, without plastic Deformations of the weld or the mounting tabs 30, to allow.
- FIG. 7 The geometrical configuration of the discharge lamp 1 described in FIG. 7 can be used in addition to the preceding exemplary embodiments from FIGS. 1 to 6 according to the invention.
- a discharge lamp with a lamp bulb held by a lamp bulb.
- four metal fastening straps arranged approximately uniformly about a lamp longitudinal axis offset each other. These are welded to the lamp base firmly embracing metal clip.
- Each fastening tab has a holding section and a subsequent welding section.
- a weld cross-section in a connection plane lying between the metal clamp and the weld section has an area of at least 0.5 mm 2 and / or the holding portion has at least one recess.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009034081A DE102009034081A1 (de) | 2009-07-21 | 2009-07-21 | Entladungslampe und Verfahren zur Herstellung einer derartigen Entladungslampe |
PCT/EP2010/058822 WO2011009686A2 (de) | 2009-07-21 | 2010-06-22 | Entladungslampe und verfahren zur herstellung einer derartigen entladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2457246A2 true EP2457246A2 (de) | 2012-05-30 |
EP2457246B1 EP2457246B1 (de) | 2017-08-09 |
Family
ID=43221837
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10728183.4A Not-in-force EP2457246B1 (de) | 2009-07-21 | 2010-06-22 | Entladungslampe und verfahren zur herstellung einer derartigen entladungslampe |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2457246B1 (de) |
JP (1) | JP2012533859A (de) |
CN (1) | CN102473565B (de) |
DE (1) | DE102009034081A1 (de) |
WO (1) | WO2011009686A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6315333B2 (ja) * | 2014-06-30 | 2018-04-25 | 東芝ライテック株式会社 | 放電ランプの製造方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2227379B (en) * | 1988-12-21 | 1993-07-14 | Daiichi Denso Buhin | Clamp type connection device |
US5029057A (en) * | 1989-11-20 | 1991-07-02 | Gte Products Corporation | Clipped together lamp base |
US5216319A (en) * | 1990-09-26 | 1993-06-01 | U.S. Philips Corporation | Capped high-pressure discharge lamp |
US5410213A (en) * | 1993-02-05 | 1995-04-25 | Cooper Industries, Wagner Lighting Division | Mounting strap for replacement halogen lamp |
JP3728322B2 (ja) * | 1995-05-03 | 2005-12-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | キャップ付きランプ |
US6203169B1 (en) * | 1999-06-25 | 2001-03-20 | Osram Sylvania Inc. | Lamp and method of producing same |
JP2001087879A (ja) * | 1999-09-22 | 2001-04-03 | Hitachi Constr Mach Co Ltd | レーザ溶接方法 |
US7119483B2 (en) * | 2001-07-06 | 2006-10-10 | Koninklijke Philips Electronics, N.V. | Lamp, in particular for automotive headlights |
JP3763525B2 (ja) * | 2002-03-29 | 2006-04-05 | 本田技研工業株式会社 | 溶接方法および溶接装置 |
JP2004098122A (ja) * | 2002-09-09 | 2004-04-02 | Futaba Industrial Co Ltd | レーザー溶接方法 |
US7002285B2 (en) * | 2003-01-03 | 2006-02-21 | General Electric Company | Discharge lamp with bulb fixture arrangement and method for manufacturing the same |
WO2005071794A2 (en) * | 2004-01-22 | 2005-08-04 | Koninklijke Philips Electronics N.V. | A lamp and a method of attaching a burner to a cap of lamp |
US7249876B2 (en) * | 2005-11-05 | 2007-07-31 | Kong Li Technology Co., Ltd. | Lamp holder for high intensity discharge lamp |
DE102006042178A1 (de) | 2006-09-08 | 2008-03-27 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Lampensockel |
DE102006058887B4 (de) * | 2006-12-13 | 2019-01-17 | Osram Gmbh | Verfahren zum Haltern von Lampengefäßen |
JP5371787B2 (ja) * | 2007-03-12 | 2013-12-18 | コーニンクレッカ フィリップス エヌ ヴェ | 高圧放電ランプ |
JP2009237412A (ja) * | 2008-03-28 | 2009-10-15 | Sanyo Chem Ind Ltd | 感光性樹脂組成物 |
-
2009
- 2009-07-21 DE DE102009034081A patent/DE102009034081A1/de not_active Withdrawn
-
2010
- 2010-06-22 JP JP2012520979A patent/JP2012533859A/ja active Pending
- 2010-06-22 WO PCT/EP2010/058822 patent/WO2011009686A2/de active Application Filing
- 2010-06-22 EP EP10728183.4A patent/EP2457246B1/de not_active Not-in-force
- 2010-06-22 CN CN201080033209.8A patent/CN102473565B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2011009686A2 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011009686A2 (de) | 2011-01-27 |
JP2012533859A (ja) | 2012-12-27 |
DE102009034081A1 (de) | 2011-01-27 |
CN102473565B (zh) | 2016-01-20 |
WO2011009686A3 (de) | 2011-12-15 |
EP2457246B1 (de) | 2017-08-09 |
CN102473565A (zh) | 2012-05-23 |
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