JP6005158B2 - Assembly for discharge lamp and discharge lamp - Google Patents

Description

  The invention relates to an assembly for a discharge lamp according to the superordinate concept of claim 1 and to a discharge lamp comprising such an assembly.

I. BACKGROUND ART Such an assembly and a discharge lamp are disclosed in, for example, WO 2011/033417. This document describes an assembly comprising a lamp vessel unit, a sleeve surrounding the lamp vessel unit with a clamp fit, a securing ring for securing the assembly to the lamp base, and a tab for securing the sleeve to the securing ring. Yes.

II. DISCLOSURE OF THE INVENTION It is an object of the present invention to provide an assembly as mentioned at the beginning and a discharge lamp as mentioned at the beginning, with improved positioning of the lamp vessel unit.

  This object is achieved according to the invention by an assembly having the configuration according to the characterizing part of claim 1. Particularly preferred embodiments of the invention are set out in the dependent claims.

  The assembly according to the present invention includes a lamp vessel unit, a sleeve surrounding the lamp vessel unit with a clamp fit, a fixing ring for fixing the assembly to the lamp base, and a tab for fixing the sleeve to the fixing ring. According to the present invention, the tab is fixed to the lower surface of the fixing ring in the assembled state facing the lamp base of the discharge lamp. This lower surface is referred to throughout this specification as the lower surface of the retaining ring for the sake of clarity.

  Before describing the advantages of the present invention, the concept of the “lower surface” of the retaining ring is first defined below. The lamp vessel unit of the assembly according to the present invention is held in the ring opening of the fixing ring by a sleeve and a tab. The lamp vessel unit includes a first end disposed in the lamp base after assembly of the assembly, and a second end located on the opposite side of the lamp base after assembly of the assembly. The side of the retaining ring that faces the first end of the lamp base or lamp vessel after assembly of the assembly is referred to as the lower surface of the retaining ring. Accordingly, the other side of the fixing ring opposite the lamp base after assembly of the assembly and facing the second end of the lamp vessel unit is referred to as the upper surface of the fixing ring. The lower surface and the upper surface of the fixing ring each form a plane extending perpendicular to the ring axis of the fixing ring. The first end of the lamp vessel unit is also referred to as the end closer to the base of the lamp vessel unit, and the second end of the lamp vessel unit is likewise the end far from the base of the lamp vessel unit. It is also called. Therefore, the lower surface of the fixing ring represents the side of the fixing ring that faces the end portion closer to the base of the lamp vessel unit. Accordingly, the upper surface of the fixing ring is the side of the fixing ring that faces the end of the lamp vessel unit that is farther from the base. The concepts of “bottom surface” and “top surface” are helpful for easy understanding and conform to the drawing depiction. The discharge lamp according to the invention is of course preferably operated in a horizontal position, i.e. with a horizontally oriented discharge bottom and a horizontally extending lamp vessel unit.

  The holding of the lamp vessel unit is simplified and improved by fixing the position of the tabs of the assembly on the lower surface of the fixing ring according to the present invention. Thus, the tab of the assembly according to the invention may extend mainly outside the ring opening of the fixing ring, in particular below the lower surface of the fixing ring. Thus, sufficient space is provided to configure the tabs to have a spring action and to weld the tabs to the sleeve and the retaining ring. According to the first preferred aspect of the assembly, the welding of the sleeve or the fixing ring and the tab by the laser can be performed from the same side. Furthermore, the fixing of the position of the tab on the underside of the fixing ring provides sufficient space for the provision of a tab, for example a hook-shaped or S-shaped shape, so that the tab between the sleeve and the fixing ring is good. Spring action and good clamping fit are guaranteed.

  The tab of the assembly according to the invention is preferably connected to the sleeve at the contact connection area located below the lower surface of the fixing ring, i.e. between the lower surface of the fixing ring and the end closer to the base of the lamp vessel unit. As a result, the contact connection areas have a smaller spacing relative to the lower surface of the fixing ring than to the upper surface. This allows the tab to be placed outside the ring opening of the retaining ring, and the sleeve with the contact connection area described above can be placed in the lamp base or in the area of the lamp base opening after assembly of the assembly. Thus, the portion of the lamp vessel unit that protrudes from the lamp base can be shortened accordingly.

  The tab is preferably referred to below as the tab ring and is configured as a component of the ring that is fixed in position to the lower surface of the fixing ring. In this tab ring, all tabs can be manufactured from stamped sheet metal parts or deep drawn parts, and this tab ring is tabbed on the lower surface of the fixing ring by a welded connection between the tab ring and the fixing ring. It is possible to fix the position easily.

  Preferably, the tabs are each integrally molded inside the tab ring along the circumference of the tab ring, each extending toward the ring axis of the tab ring and protruding from the ring plane of the tab ring With parts. By providing such a shape, it is easily achieved that the end of the tab facing the ring axis abuts against the sleeve with a spring action.

  The tab ring preferably further comprises a plurality of weld tabs used for welding to the lamp base. Thereby, in addition to the fixing ring, the tab ring can also be coupled to the lamp base, and the strength of the coupling portion between the assembly and the lamp base can be increased.

  The retaining ring of the assembly according to the invention preferably comprises a notch for receiving a lamp-based web. Thus, the assembly can be fixed to the lamp base by the fixing ring. In particular, the assembly can first be produced as a prefabricated component unit, which component unit is only subsequently assembled to the lamp base. Furthermore, during assembly fabrication, the spatial orientation and position of the lamp vessel unit relative to the upper surface of the fixing ring is first specified by tabs and sleeves, and then the assembly is assembled to the lamp base of the discharge lamp by the fixing ring. Can do. In this case, the upper surface of the fixing ring defines a reference plane in the direction of the discharge lamp provided in the vehicle headlamp with respect to the optical system of the vehicle headlamp after assembly. In this case, the fixing ring preferably also serves as a reference ring in the direction of the lamp vessel unit and the illumination means enclosed within the lamp vessel unit, with regard to the lamp base and the vehicle headlamp optics. Thus, preferably, the fixation ring is configured to be rigid with respect to torsion and strain. The fixation ring may consist of one or more parts.

  The sleeve, tab or tab ring and fixing ring of the assembly according to the invention are preferably made of metal, which allows a welded connection between these components. In addition, this allows the sleeve to be connected to the ground reference potential of the operating device for the discharge lamp for use as an ignition aid.

  A discharge lamp according to the present invention includes a lamp base in which components of an operation device for a discharge lamp are arranged in an inner chamber, a lamp vessel unit, a sleeve surrounding the lamp vessel unit with a clamp fit, a fixing ring, and a sleeve on the fixing ring. An assembly having a tab for fixing the position, the lower surface of the fixing ring connected to the tab facing the lamp base, and the end of the lamp container unit enters the inner chamber of the lamp base through a predetermined opening. The assembly is arranged and the fixing ring is connected to the lamp base.

  Thereby, the discharge lamp according to the invention comprises an assembly that can be configured as a prefabricated structural unit, which can be easily assembled to the components of the operating device at the lamp base by means of a fixing ring. . In particular, the assembly can be provided with a pre-adjusted lamp vessel unit, ie a lamp vessel unit with an adjusted spatial orientation and position relative to the upper surface of the retaining ring. As a result, the gas discharge electrode used as the illumination means enclosed in the lamp vessel unit is also adjusted with respect to the upper surface of the fixing ring. This eliminates the further adjustment process of the illumination means during assembly of the assembly in the lamp base. This is because the upper surface of the fixing ring can be used as a reference plane in the direction of the discharge lamp according to the present invention in a vehicle headlamp or lighting fixture. Furthermore, the assembly makes it easy to place the sleeve close to the base of the lamp vessel unit with respect to the lower surface of the fixing ring via the position of the sleeve on the lamp vessel unit and the relative arrangement of the fixing ring and the sleeve, the fixing ring. The distance between the end of the lamp container unit far from the base of the lamp container and the depth of penetration of the lamp container unit into the lamp base can be determined.

  Preferably, the lamp base according to the invention comprises a plurality of webs arranged in a plurality of notches in the fixing ring, which allows a secure fixing of the assembly in the lamp base. The web is preferably arranged along the circumference of the opening provided in the lamp base, thereby cooperating with a notch that fits precisely along the circumference of the ring inside or outside the fixing ring. be able to. The web may have a variety of configurations to define a unique orientation of the fixation ring or assembly with respect to the lamp base.

  The web is preferably made of metal, which allows a welded connection between the web and the retaining ring. In addition, the web is preferably also welded to the weld tab of each tab ring, thereby increasing the strength of the joint between the lamp base and the assembly.

  Preferably, the sleeve, at least one tab, or the retaining ring is connected to the ground reference potential of the operating device for the discharge lamp according to the invention. As a result, the sleeve can be used as an ignition auxiliary means for igniting the discharge gas in the discharge lamp in combination with the conductive coating on the lamp vessel unit, for example. If a metal-coated lamp base or a metal housing for the lamp base is used, the metal base surface of the lamp base or the metal housing of the lamp base is connected to the ground reference potential of the operating device via the retaining ring. Can be used as an electromagnetic shield, thereby improving the electromagnetic compatibility of the discharge lamp according to the present invention.

  The discharge lamp according to the present invention is preferably configured as a high-pressure discharge lamp used as a light source for an automobile headlamp. The lamp base of the high-pressure discharge lamp is preferably provided with all the components of the operating device for the high-pressure discharge lamp, so that the electrical connection of the high-pressure discharge lamp is supplied with energy from the outside. Therefore, it is only necessary to supply the voltage of the automobile electrical system (mounted power supply network). Accordingly, the operating device includes components necessary for generating the operating voltage of the high-pressure discharge lamp and controlling the output in addition to the ignition device used for ignition of the discharge gas.

1 is a partial cross-sectional schematic view of an assembly for a discharge lamp according to a first aspect of the present invention. FIG. 2 is a plan view showing the top surface of the retaining ring of the assembly shown in FIG. 1 without a lamp vessel unit. FIG. 2 is a plan view showing the lower surface of the fixing ring of the assembly shown in FIG. 1 with the lamp vessel unit omitted. FIG. 2 shows the assembly shown in FIG. 1 with a lamp-based section fixed to the retaining ring. FIG. 5 is a partial view of the inside of the fixing ring in the section of the lamp base of FIG. 4 fixed in position to the fixing ring. FIG. 6 is a schematic top view of a discharge lamp according to a preferred embodiment of the present invention having the assembly shown in FIGS. It is a schematic sectional drawing of the discharge lamp shown by FIG. FIG. 4 is a schematic partial cross-sectional view of an assembly for a discharge lamp according to the second aspect of the present invention after assembly to a lamp base. FIG. 4 is a schematic partial cross-sectional view of an assembly for a discharge lamp according to a third aspect of the present invention after assembly to a lamp base. 6 is a schematic partial cross-sectional view of an assembly for a discharge lamp according to a fourth aspect of the present invention after being assembled to a lamp base. FIG. FIG. 11 is a diagram partially showing a joint between a fixing ring and a tab ring of the assembly shown in FIG. 10. FIG. 12 is a plan view of a welding tab of the tab ring of the assembly shown in FIGS. 10 and 11.

III. DESCRIPTION OF PREFERRED EMBODIMENTS The present invention is described in detail below based on preferred embodiments.

  1 to 5 show the assembly according to the first aspect of the invention and the mounting of the assembly in the lamp base of a high-pressure discharge lamp. This assembly is used as a constituent unit for a high-pressure discharge lamp provided as a light source in an automobile headlamp.

  The assembly 1 includes a substantially cylindrical lamp vessel unit 100, a metal sleeve 120 that surrounds the lamp vessel unit 100 with a clamp fit, a fixing ring 130, and a tab ring 140. The sleeve 120 is made of stainless steel, for example, a special steel having a material number (EN standard) 1.4016. The fixing ring 130 is made of stainless steel, for example, a special steel having a material number of 1.4301 or 1.4016 or 1.4003, and is configured to be rigid with respect to twisting and distortion (bending). The fixing ring 130 has a thickness of 1.5 mm. The tab ring 140 is made of stainless steel, preferably cold-hardened steel of material number 1.4301, is formed as a stamped sheet metal part and has a thickness of 0.3 mm. The tab ring 140 is disposed coaxially with the fixing ring 130 in a recess provided on the lower surface 131 of the fixing ring 130, and is coupled to the lower surface 131 of the fixing ring 130 by a plurality of laser welding points 147. . The tab ring 140 includes four tabs 142, 143, 144, and 145 integrally formed on the inner side 141 at equal intervals along the circumference of the tab ring, and the tabs 142, 143, 144, and 145 are respectively tab rings 140. Extending from the ring plane of the tab ring 140. The tabs 142, 143, 144, and 145 are respectively spring-elastically abutted against the sleeve 120 in the contact connection region 121 below the lower surface 131 of the fixing ring 130, and are thus joined to the sleeve 120 by laser welding. The ring 140 is bent out of the ring plane away from the fixed ring 130. The contact connection region 121 between the tabs 142, 143, 144, 145 and the sleeve 120 is located below the lower surface 131 of the fixing ring 130, that is, the contact connection region 121 is more than the upper surface 132 of the fixing ring 130. Also has a smaller spacing relative to the lower surface 131 of the retaining ring. Accordingly, the tabs 142, 143, 144, 145 do not extend over the ring opening of the retaining ring 130. The retaining ring 130 includes three notches 134, 135, 136 disposed inwardly along the circumference of the retaining ring, each notch 134, 135, 136 being used to receive a lamp-based web. These notches 134, 135, 136 are each defined by a wall section 137 of the retaining ring 130 from three directions and by a section 146 of the tab ring 140 in a fourth direction. Each section 146 of the tab ring 140 is preferably configured as a weld tab 146, respectively. The weld tab 146 is stamped from the ring disc-like portion of the tab ring 140, extends radially outward, and projects beyond the ring plane of the tab ring 140.

  The lamp vessel unit 100 is held in the ring opening of the fixing ring 130 by the sleeve 120, the fixing ring 130, and the tab ring 140 including the four tabs 142, 143, 144, and 145. The lamp container unit 100 extends through the ring opening of the fixing ring 130, and in this case, the lower surface 131 of the fixing ring 130 faces the first end 101 closer to the base of the lamp container unit 100. The upper surface 132 of the fixing ring 130 faces the second end portion 102 far from the base of the lamp vessel unit 100. FIG. 1 schematically shows only a portion of the lamp vessel unit 100 surrounded by the sleeve 120. FIG. 1 shows a cross-sectional view of the assembly along the line AB shown in FIG. 2 and 3 do not show the lamp vessel unit 100 for the sake of clarity. To assemble the assembly 1, the tab ring 140 is welded to the lower surface 131 of the fixing ring 130, and then the lamp vessel unit 100 surrounded by the clamp fit by the sleeve 120 is connected to the ring opening of the fixing ring 130 and the tab ring 140. Therefore, the tabs 142, 143, 144, and 145 of the tab ring 140 abut against the sleeve 120 in a spring-elastic manner. Therefore, the lamp vessel unit 100 is fixed so that the gas discharge electrodes 111 and 112 occupy a desired spatial position and orientation with respect to the three reference protrusions 133 provided on the upper surface 132 of the fixing ring 130 in the lamp vessel unit. Aligned with respect to the ring 130. Subsequently, the tabs 142, 143, 144, 145 and the sleeve 120 are joined at the contact connection region 121 by laser welding, whereby the lamp vessel unit 100 is fixed in position by this alignment. The complete assembly 1 can then be assembled to the lamp base 2 of the high-pressure discharge lamp.

  4 and 5 schematically show part of the assembly 1 assembly in the lamp base 2 of the high-pressure discharge lamp. FIG. 4 shows the same cross section as FIG. The lamp base 2 includes a substantially rectangular parallelepiped housing 200 and three webs 210, 220, and 230, and the webs 210, 220, and 230 are along the edge of the opening 300 provided in the side wall 201 of the housing 200. Has been placed. The housing 200 is preferably made of a metal, such as aluminum, an aluminum alloy or a magnesium alloy. In the assembly 1, the end portion 101 closer to the base of the lamp vessel unit 100 enters the inner chamber of the housing 200 through the opening 300, and the three webs 210, 220, and 230 are respectively formed from the three notches 134, 135, and 136 It is fixed to the lamp base 2 so as to be arranged in one of the lamps. Each of the three webs 210, 220, and 230 includes a widened central portion 211, 221 that is in contact with the lower surface 131 of the fixing ring 130. The widened central portion of the third web 230 is not seen from the drawing. The central portions 211 and 221 of the three webs 210, 220, and 230 are joined to the edge of the ring-shaped collar 212. The collar 212 forms the edge of the opening 300. FIG. 5 shows a view of the inside of the fixing ring 130 and the tab ring 140 in the direction of the arrow X shown in FIG. In addition to the notches 134, 135, 136, the upper edges of the webs 210, 220, 230 disposed within the notches 134, 135, 136 are also shown in FIG. The three webs 210, 220, and 230 are each provided with two protrusions 240 at the upper edge, and the protrusions 240 are used to weld the webs 210, 220, and 230 to the fixing ring 130. Further, the weld tab 146 of the tab ring 140 is in contact with each web 210, 220, 230, and the weld tab 146 is welded to each web 210, 220, 230 during assembly of the assembly 1 to the lamp base 2. The number of welding tabs 146 matches the number of webs 210, 220, 230.

  6 and 7 show the lamp base 2 and the lamp vessel unit 100 of the high-pressure discharge lamp in detail. In FIG. 6, the tab ring 140 and tabs 142, 143, 144, 145 of the tab ring are not shown for the sake of clarity. The lamp base 2 includes a substantially rectangular parallelepiped housing 200 having six metal side walls 201, 202, 203, 204, 205, 206, and a component of an operating device for a high-pressure discharge lamp in the inner chamber of the housing 200. Is arranged. The side wall 201 of the housing 200 is provided with an opening 300 for assembling the assembly 1 and accommodating the end portion 101 closer to the base of the lamp vessel unit 100. The ring-shaped collar 212 described above is formed integrally with the side wall 201 of the housing 200 (FIG. 4), or includes a flange 213 bent from the collar 212 in the shape of a ring disk. The flange 213 is welded to the side wall 201 on the inside or the outside (FIG. 8). The lamp base 2 is provided with an electrical connection for supplying energy to the high-pressure discharge lamp. The electrical connection portion is disposed on the electrical connection member 207, and the electrical connection member 207 protrudes through the side wall 202 of the housing 200. The electrical connection portion provided in the connection member 207 is supplied with the voltage of the electric system of the automobile, thereby supplying electric energy to the operating device of the high-pressure discharge lamp disposed in the inner chamber 301 of the housing 200. can do. The operating device also includes an ignition device that ignites the discharge gas in the high-pressure discharge lamp. The ignition device is configured, for example, as a pulse ignition device as is well known, and includes a high voltage transformer, the primary winding of which is charged with an ignition capacitor having a spark section connected in parallel to the ignition capacitor. The secondary winding, which is arranged in the current circuit, supplies the electrode 112 with a high voltage pulse for igniting the discharge gas via the current supply 114 during the ignition phase. The component of the ignition device that guides the high voltage can be separated from the other components of the operating device in the inner chamber 301 of the lamp base 2 by a wall made of electrically insulating plastic. Thus, the high voltage tolerance of the lamp base 2 is enhanced. The operating device includes, for example, a boost converter and a full bridge inverter connected to the output of the boost converter, and a discharge section of the high pressure discharge lamp is connected to a branch of the bridge, whereby the high pressure discharge lamp At the end of the ignition phase, a known low frequency, typically 500 Hz, square wave lamp current is supplied.

  The lamp vessel unit 100 of the high-pressure discharge lamp comprises a discharge vessel 103 made of quartz glass, on which gas discharge electrodes 111 and 112 and a filling for generating a gas discharge are arranged, sealed on both sides, An outer bulb 104 surrounding the discharge vessel 103 is included. The fill is preferably mercury free and includes xenon and sodium, scandium, zinc and indium iodide. The outer bulb 104 is welded to the end of the discharge vessel 103. One gas discharge electrode 112 is connected to the current supply portion 114 closer to the base protruding beyond the end portion 101 closer to the base of the lamp vessel unit 100, and the other gas discharge lamp electrode 111 is It is connected to a current supply portion 113 far from the base protruding beyond the end portion 102 far from the base of the lamp vessel unit 100, and the current supply portion 113 far from the base is connected to the lamp vessel unit 100. Are guided back towards the lamp base 2 via a current supply part surrounded by a ceramic insulator 115 extending in parallel. The current supply units 113 and 114 are respectively connected to electrical contact connection units of the operating device. A current supply portion surrounded by the ceramic insulator 115 of the current supply portion 113 far from the base passes through the ring opening of the fixing ring 130, the penetrating portion 148 provided in the tab ring 140, and the opening 300, so that the lamp Guided to the inner chamber 301 of the housing 200 of the base 2.

  With the assembly 1, the end closer to the base of the lamp vessel unit 100 with respect to the lower surface 131 of the fixing ring 130 through the position of the sleeve 120 on the lamp vessel unit 100 and the relative arrangement of the fixing ring 130 and the sleeve 120. 101, the distance of the end 102 far from the base of the lamp container unit 100 to the upper surface 132 of the fixing ring 130, and the depth of penetration of the lamp container unit 100 into the inner chamber 301 of the housing 200 of the lamp base 2. Can be prescribed. In particular, the distance between the end portions of the gas discharge electrodes 111 and 112 with respect to the reference plane defined by the three reference protrusions 133 positioned on the upper surface 132 of the fixing ring 130 can also be defined to a desired value. Half of the sum of the gaps on the discharge side of both gas discharge electrodes with respect to the reference plane is referred to as the light-center-length or LCL value. Thus, the LCL value of the high-pressure discharge lamp according to the invention can be adjusted to the desired value, for example 18 mm, in the same manner.

  FIG. 8 schematically shows an assembly 1 ′ according to the second aspect of the present invention. The assembly 1 'according to the second aspect of the present invention differs from the assembly 1 according to the first aspect of the present invention described above only in the other configuration of the tabs of the tab ring 140 or 140'. Therefore, in the drawings, the same reference numerals are used for the same parts of both aspects, and for the description of the same parts, refer to the description of the assembly according to the first aspect. The tab ring 140 ′ is similarly provided with four tabs 142 ′ arranged at equal intervals along the circumference of the tab ring 140 ′ and integrally formed inside, and the tab 142 ′ is in the ring axis of the tab ring. Extends towards and protrudes from the ring plane of the tab ring 140 '. The tabs 142 ′ are each curved in a hook shape, are elastically abutting against the sleeve 20, and are joined to the sleeve 120 by laser welding at a contact connection region 121 between the sleeve 120 and each tab 142 ′. ing. The tab ring 140 ′ is welded to the lower surface 131 of the fixing ring 130 by laser welding. For all other details, the assemblies 1, 1 'according to both aspects are identical.

  FIG. 9 schematically shows an assembly 1 ″ according to a third aspect of the present invention. The cross section of FIG. 9 corresponds to the cross section of FIG. The assembly 1 "according to the third aspect of the present invention differs from the assembly 1 according to the first aspect of the present invention described above only in the other configuration of the tab of the tab ring 140 or 140". Therefore, in the drawings, the same reference numerals are used for the same parts of both aspects, and for the description of the same parts, refer to the description of the assembly according to the first aspect. The tab ring 140 ″ is similarly provided with four tabs 142 ″, 143 ″ arranged at equal intervals along the circumference of the tab ring 140 ″ and integrally formed on the inside thereof. , 143 ″ extends toward the ring axis of the tab ring 140 ″ and protrudes from the ring plane of the tab ring 140 ″. Similar to the tabs 142, 143, 144, 145 according to the first aspect of the present invention, the tabs 142 ″, 143 ″ are spring-elastically abutted against the sleeve 120 and coupled to the sleeve 120. The tabs 142 ″, 143 ″ according to the third aspect of the present invention are the tabs 142 ″, 143, 144, 145 according to the first aspect of the present invention, and the tabs 142 ″ according to the third aspect of the present invention, 143 ″ each has a raised portion facing the upper surface 132 of the fixing ring 130, which differs in that this raised portion slightly protrudes into the ring opening of the fixing ring 130. For all other details, the assembly 1 according to the first aspect and the assembly 1 '' according to the third aspect coincide.

  FIG. 10 schematically shows an assembly 1 ″ ″ according to a fourth aspect of the present invention. The assembly 1 "" according to the fourth aspect of the invention differs from the assembly 1 according to the first aspect of the invention only in another configuration of the retaining ring. Therefore, in the drawings, the same reference numerals are used for the same parts of both aspects, and for the description of the same parts, refer to the description of the assembly of the first aspect. According to the first aspect of the present invention, the fixing ring 133 is integrally formed, but the fixing ring 130 '' 'according to the fourth aspect consists of two ring disks 130a and 130b, The ring disks 130a and 130b are arranged coaxially up and down and are welded to each other. As a result, the first ring disk 130a forms the upper surface 132 of the fixing ring 130 ′ ″ provided with the reference protrusion 133, and the second ring disk 130b forms the lower surface 131 of the fixing ring 130 ′ ″. Form. Both ring discs 130a, 130b of the fixing ring 130 "" are made of stainless steel, for example special steel with material number 1.4301, 1.4016 or 1.4003. The first ring disk 130a has a thickness of 0.7 mm, and the second ring disk 130b has a thickness of 1.5 mm. In the schematic views of FIGS. 10 and 11, the thickness ratio of the ring disks 130a and 130b is not accurately shown. The tab ring 140 of the assembly 1 ″ ″ according to the fourth aspect is welded to the flat lower surface 131 of the second ring disk 130 b or the fixing ring 130 ″ ″. The lower surface 131 of the fixing ring 130 ″ ″ is not provided with a recess for the tab ring 140. The two-layer configuration of the fixing ring 130 ″ ″ provides high rigidity against strain and twist. For all other details, the assembly 1 according to the first aspect and the assembly 1 "" according to the fourth aspect coincide.

  11 and 12 show the connection between the welding tab 146 of the tab ring 140 and the web 210 of the lamp base 2 and the connection between the web 210 and the fixing ring 130 '' 'shown in FIG. Shown in detail. The web 210 of the lamp base 2 engages the notch 134 formed by the wall portion 137 of the fixing ring 130 '' 'and abuts the wall portion 137 of the fixing ring 130' '' at the contact connection surface. . The weld tab 146 of the tab ring 140 is bent toward the upper surface 132 of the fixation ring 130 ″ ″ and extends into the notch 134 of the fixation ring 130 ″ ″ and abuts the web 210. As a result, the web 210 is placed in a gap formed by the wall portion 137 of the retaining ring 130 ″ ″ and the weld tab 146 with a clamp fit. The web 210 is coupled to the weld tab 146 and the retaining ring 130 ″ ″ by, for example, resistance inert gas welding (WIG welding).

  The present invention is not limited to the above-described embodiment. For example, to increase stability, the retaining ring 130 may be provided with more than three notches 134, 135, 136 and correspondingly more webs 210, 220 adapted to the notches of the lamp base 2. , 230 and a welding tab 146 of the tab ring 140 may be provided. For example, six notches of this type and six webs adapted to the notches and six weld tabs may be provided on the tab ring. Further, the tab rings 140, 140 ′, 140 ″ may include another number of tabs instead of the four tabs 142, 243, 144, 145 welded to the sleeve 120. At least three tabs should be provided on the tab rings 140, 140 ', 140 "for stability reasons. Further, it is not necessary to provide a recess in the lower surface 131 of the fixing ring 130 for the tab ring 140. The tab ring 140 may be disposed on the flat bottom surface 131 of the fixing ring 130. If the tabs 142, 143, 144, 145 are directly welded to the lower surface 131 of the fixing ring 130, the tab rings 140, 140 ′, 140 ″ may be omitted. The fixing ring 130, 130 ″ ″ may have a notch on the outer edge along the circumference of the fixing ring. The notch is used as a coding part for assembling the high-pressure discharge lamp correctly in the automobile headlamp.

Claims (11)

An assembly (1; 1 ') for a discharge lamp,
A lamp vessel unit (100);
A sleeve (120) surrounding the lamp vessel unit (100) with a clamp fit;
A fixing ring (130) provided for fixing the assembly (1, 1 ') to the lamp base (2) of the discharge lamp;
Tabs (142, 143, 144, 145; 142 ') for fixing the sleeve (120) to the fixing ring (130);
An assembly for a discharge lamp comprising:
The tabs (142, 143, 144, 145; 142 ′) are fixed to the lower surface (131) of the fixing ring (130) facing the lamp base (2) of the discharge lamp in the assembled state. And
The tabs (142, 143, 144, 145; 142 ′) are configured as components of the tab ring (140; 140 ′) fixed to the lower surface (131) of the fixing ring (130). An assembly for a discharge lamp, characterized in that   The tabs (142, 143, 144, 145; 142 ′) are in contact with the sleeve (120) in contact connection regions (121) located below the lower surface (131) of the fixing ring (130). The contact connection regions (121) of the tabs (142, 143, 144, 145; 142 ′) are respectively connected to the lower surface (131) of the fixing ring (130) and the fixing ring (130). The assembly of claim 1, wherein the assembly has a smaller spacing than the upper surface (132) of the discharge lamp opposite the lamp base (2).   The tabs (142, 143, 144, 145; 142 ′) are integrally formed on the inner side (141) of the tab ring (140; 140 ′) along the circumference of the tab ring (140; 140 ′), respectively. Each comprising a tab portion extending toward a ring axis of the tab ring (140; 140 ') and projecting from a ring plane of the tab ring (140; 140'). Assembly.   The tab ring (140, 140 ', 140' ') comprises a plurality of weld tabs (146) used for welding to a plurality of webs (210, 220, 230) of the lamp base (2). Item 3. The assembly according to Item 1 or 2.   The fixing ring (130) comprises a plurality of notches (134, 135, 136) for receiving a plurality of webs (210, 220, 230) of the lamp base (2). The assembly according to any one of the preceding claims. The assembly of claim 4 , wherein the retaining ring (130), the sleeve (120), the tabs (142, 143, 144, 145; 142 ') and the weld tab (146) are made of metal. A lamp base (2), wherein the components of the operating device for the discharge lamp are arranged in the inner chamber (301) of the lamp base (2);
Assembly (1, 1 ') according to any one of the preceding claims,
A discharge lamp comprising:
One end of the lamp vessel unit (100) with the lower surface (131) of the fixing ring (130) connected to the tabs (142, 143, 144, 145; 142 ') facing the lamp base (2). The assembly (1, 1 ′) is arranged so that the portion (101) enters the inner chamber (301) of the lamp base (2) through a predetermined opening (300), and the fixing ring (130 ) Is coupled to the lamp base (2),
A discharge lamp characterized by that.   The discharge lamp according to claim 7, wherein the lamp base (2) comprises a plurality of webs (210, 220, 230) arranged in a plurality of notches (134, 135, 136) of the fixing ring (130).   The discharge lamp according to claim 8, wherein the web (210, 220, 230) is arranged along the circumference of the opening (300) provided in the lamp base (2).   The discharge lamp according to claim 8 or 9, wherein the web (210, 220, 230) is made of metal.   The sleeve (120), at least one of the tabs (142, 143, 144, 145; 142 ') or the retaining ring (130) is connected to a ground reference potential of the operating device. The discharge lamp of any one of Claims 10-10.

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