CN1309004C

CN1309004C - Arc tube for vehicle-mounted high-intensity discharge lamp

Info

Publication number: CN1309004C
Application number: CNB200410028055XA
Authority: CN
Inventors: 杨正名; 高光义; 张明; 柴国生
Original assignee: Cnlight Co Ltd
Current assignee: Cnlight Co Ltd
Priority date: 2004-07-13
Filing date: 2004-07-13
Publication date: 2007-04-04
Anticipated expiration: 2024-07-13
Also published as: CN1595600A

Abstract

The present invention discloses a high strength electric arc tube for a discharge lamp, which is a sphere presenting an oval and is filled with ionization substances. Both ends of the electric arc tube are respectively provided with a first neck body and a second neck body which present a 180 DEG angle and are sealed, wherein the diameters of the first neck body and the second neck body are shrunk. A first terminal A electrode 3a, a first terminal B electrode 3b and a second terminal electrode 4a are arranged in the electric arc tube and are respectively electrically connected with a corresponding outside lead by a conductive body in the neck body at the corresponding end. A cover casing surrounding the electric arc tube and the neck body is respectively arranged outside the electric arc tube and the neck body. Due to the fact that the present invention combines a dipped beam light source and a main beam light source to one lamp, the dipped beam and main beam switching speed and the beam quality are enhanced, and the high voltage can be avoided in switching. Simultaneously, the cost is also reduced. The present invention can be used for automotive illumination high-intensity discharge lamps combining the main beam and dipped beam illumination into a whole and can be randomly switched over quickly.

Description

Automobile-used high-intensity discharge lamp electric arc tube

Technical field

The present invention relates to a kind of high-intensity discharge lamp electric arc tube, especially a kind ofly be provided with three automobile-used high-intensity discharge lamp electric arc tubes of two pairs of electrodes.

Background technology

The common structure of high-intensity discharge lamp that is used for the single-ended band lamp holder of automobile headlamp illumination is: comprise the airproof that a usefulness pure quartz glass makes and be filled with spherical or axiolitic gas discharge electric arc tube of being of ionisable substance, comprise pair of electrodes in the electric arc tube, the electric arc tube two ends are provided with diameter contraction that is mutually 180 degree angles and the neck body part that seals, electrode of sealing-in respectively in this two neck body, contact conductor also passes through from neck body central authorities.In order to guarantee the electric arc tube working stability, electric arc tube and neck body are provided with outward and can absorb the outer casing that ultraviolet quartz material is made, and case is airproof normally, and its two ends are by closing up and the electric arc tube neck body partly is tightly connected.Pass on this end lamp holder aperture near the lead-in wire of first electrode of lamp holder and draw, then be folded to the aperture that lamp holder passes on the lamp holder away from second contact conductor of lamp holder and draw from the outside of case.This use for discharge lamp can provide a kind of fixing illuminating bundle---distance light or passing beam when automobile headlamp throws light on.Switch and must to adopt two to overlap the corresponding illuminator cooperation that comprises discharge lamp, ballast and other accessory annex and carry out for carrying out far light and near light.System complex, cost height will produce high trigger voltage and have certain dark time zone to exist during switching, such lamp can not satisfy the practical application needs.

Summary of the invention

The present invention is intended to provide and a kind ofly can three electrodes be set in same discharge tube, comprises a common electrode and two absolute electrodes, can produce the high-intensity discharge lamp electric arc tube of the electric arc of two groups of desired locations.

For reaching above purpose, the present invention is achieved by the following technical solutions:

A kind of high-intensity discharge lamp electric arc tube is designed to oblong spheroid and is filled with ionisable substance, and electric arc tube two ends are respectively equipped with diameter contraction that is mutually 180 degree angles and first neck body, second neck body that seals.Be provided with the first end A electrode 3a, the first end B electrode 3b and three electrodes of the second termination electrode 4a in the electric arc tube, the first end A electrode, the first end B electrode and three electrodes of second termination electrode in the electric arc tube are electrically connected with corresponding outer lead by the electric conductor in the corresponding end neck body respectively.Described electric arc tube can be directly as the light source utilization, also can be provided with its outer casing of encirclement in that electric arc tube and first neck body, second neck body are outer.

Be provided with the first end A electrode, the first end B electrode and three electrodes of second termination electrode in the electric arc tube of the present invention, wherein the pair of electrodes first end A electrode 3a, the first end B electrode 3b are in lamp holder 10 axis top low beam head 10 ends, and another then is on lamp holder 10 axis away from lamp holder 10 ends the electrode second termination electrode 4a, the first end B electrode 3b.Its central point is respectively automobile-used illuminating lamp (as H apart from the distance of base surface datum level ₄Tungsten halogen lamp etc.) the desired light source position of distance light and passing beam.Then between this is to electrode, form an arcuation bright light source when energized forms electric arc between the pair of electrodes first end A electrode wherein, the first end B electrode or another are to electrode second termination electrode, the first end B electrode, when with power supply transfer between another electrode pair the time then electric arc transfer to immediately this to electrode between, realization almost is that the bright spot of zero transit time is switched rapidly.

Electric arc tube of the present invention can switch conversion mutually and can accurately control the electric arc light spot position to be applicable to the automobile headlamp illumination and to have dipped beam, distance light handoff functionality concurrently.Owing to collect dipped beam, distance light light source in a lamp, and can in same light fixture, power to same lamp and control light shape with same electric ballast, thereby improved dipped beam, distance light switch speed and beam quality, and the generation of high pressure when having avoided switching, cost also reduced simultaneously.This electric arc tube can be provided for the high-intensity discharge lamp of vehicle light illumination, is equipped with suitable lamp holder again and corresponding circuit that two electric arcs switch mutually and the relay realized then can replace having concurrently the application of the H4 tungsten halogen lamp of low-beam function.

Description of drawings

The schematic diagram of Fig. 1, embodiment of the invention electric arc tube structure;

Structure chart behind Fig. 2, the electric arc tube of the present invention tipping lamp holder;

Fig. 3, two circuit diagrams that electric arc switches mutually of realization.

Embodiment

For further understanding feature of the present invention, technological means and the specific purposes that reached, function, the present invention is described in further detail below in conjunction with accompanying drawing and embodiment:

Each part description: electric arc tube 1, the first neck body 2a, the second neck body 2b, tubaeform taper seat 2c, the first end A electrode 3a, the first end B electrode 3b, the second termination electrode 4a, the first end A electrode outer lead 5a, the first end B electrode outer lead 5b, second termination electrode lead-in wire, 6, the second termination electrode outer lead 6a, outer casing 7, the contraction position 7a of outer casing lower end, retainer ring 8, support pin rod 9, lamp holder 10, porcelain bushing 11.

The electric arc tube 1 of present embodiment sealing is oblong spheroid and is filled with ionisable substance, electric arc tube 1 two ends are respectively equipped with diameter contraction that is mutually 180 degree angles and the first neck body 2a that seals, the second neck body 2b, the electric arc tube 1 and the first neck body 2a, the second neck body 2b is provided with the outer casing 7 that surrounds it outward, the first end A electrode 3a that is provided with in the electric arc tube 1, the first end B electrode 3b and three electrodes of the second termination electrode 4a are drawn neck body by the molybdenum sheet and the molybdenum rod that are sealed in the neck body of respective end respectively, the first end A electrode 3a in the electric arc tube 1, the first end B electrode 3b respectively with the first end A electrode outer lead 5a that passes lamp holder 10, the first end B electrode outer lead 5b is electrically connected, the second termination electrode 4a is electrically connected with the second end lead 6 that is folded to lamp holder 10, and respectively by the first end A outer lead 5a, the first end B outer lead 5b, the second end outer lead 6a passes lamp holder 10 and draws.The second end lead, the 6 outer porcelain bushings 11 that are provided with.Outer casing 7 bottoms are by the first neck body 2a sealing of the contraction position 7a and the electric arc tube 1 of its lower end, the tubaeform taper seat 2c that the second neck body 2b makes the upper end, tubaeform taper seat 2c outer rim and outer casing 7 melt envelope and are connected, and perhaps outer casing 7 upper end reducings are melted to seal with the second neck body 2b and are connected.

Three electrodes of the first end A electrode 3a, the first end B electrode 3b of electric arc tube 1 and the second termination electrode 4a are formed two pairs of electrodes, wherein (4a, 3b) electrode pair central spot on the lamp holder axis from base surface datum level 31.7mm place, electrode pair (3a, 3b) central point then is on the lamp holder axis apart from base surface datum level 25mm place, promptly is equivalent to H respectively ₄The desired light source position of tungsten halogen lamp dipped beam and driving beam.

Electric arc tube 1 can be installed in and constitute the function renewal lamp kind identical with the H4 tungsten halogen lamp on the corresponding lamp holder 10, its lamp holder 10 is with the hot-forming integral structure of high temperature resistant, high voltage withstanding insulating polymeric material, the first neck body 2a of electric arc tube 1 and embed below lamp holder 10 end faces and guarantee that three electrodes all are on the lamp holder 10 axis line stretchers around its extension of outer casing 7.

The neck body of electric arc tube 1 shrinks the first neck body 2a and the sealing of position 7a banding electric arc tube 1 by the diameter of outer casing 7 bottoms.The metal retainer ring 8 of fixed arc pipe 1 is enclosed within on the non-contraction position outer wall of lamp holder outer casing 7 of suitable distance more than 10, support pin rod 9 one ends embedding lamp holder 10 end faces that are no less than three are fixedlyed connected with lamp holder 10, support pin rod 9 other ends and fixedly connected with the welding wing on the retainer ring 8 respectively.

Retainer ring 8 is combined by the banded sheet metal of the arc of four sections quadrants, and every section sheet metal two ends are provided with the welding wing protruding, that the outer end is provided with the semicircular opening welding hole, and four sections curved metal bands are formed closed retainer ring 8 clamping case outer walls.Evenly be provided with four outwardly directed welding wings on the metal retainer ring 8, the welding foramen alare is enclosed within root respectively and is embedded in correspondence in lamp holder 10 end faces and supports the external part of pin rod 9 and be welded to connect.The end that is embedded into that supports pin rod 9 is on the concentric and circumference of radius greater than outer casing 7 radiuses with outer casing 7 on lamp holder 10 end faces evenly distributedly, for Stability Analysis of Structures, supports pin rod 9 usually and should be no less than three.Retainer ring 8 also can be made of or the becket that has only place's opening of the required size that directly formed by whole metal tape constitutes two close semi-circular sheet metals of shape.

Photocentre position, shape and the switch instances thereof of above-mentioned electric arc tube 1 is identical with traditional double filament tungsten halogen lamp H4 lamp, 10 in the lamp holder that the present invention uses improves slightly with reference to the H4 lamp holder, the lead-in wire of three electrodes is drawn from the preformed hole at lamp holder 10 middle parts, thereby make and from the H4 light fixture, directly to replace the H4 tungsten halogen lamp and keep identical beam shape, orientation and light to distribute, but colour temperature, luminous flux and life-span then improve significantly.

The above only is the specific embodiment of the invention, can not limit scope of the invention process with this, and all equivalences of doing according to the present patent application claims and description change and revise, and all should still belong in the scope that patent of the present invention contains.

Claims

1, a kind of high-intensity discharge lamp electric arc tube, for oblong spheroid and be filled with ionisable substance, electric arc tube (1) two end is respectively equipped with diameter contraction that is mutually 180 degree angles and first neck body (2a), second neck body (2b) that seals, it is characterized in that: be provided with the first end A electrode (3a), the first end B electrode (3b) and three electrodes of second termination electrode (4a) in the described electric arc tube (1), the first end A electrode, the first end B electrode and three electrodes of second termination electrode in the electric arc tube are electrically connected with corresponding outer lead by the electric conductor in the corresponding end neck body respectively.

2, high-intensity discharge lamp electric arc tube according to claim 1, it is characterized in that: the first end A electrode (3a) of described electric arc tube (1), the first end B electrode (3b) and three electrodes of second termination electrode (4a) are formed two pairs of electrodes, wherein the electrode pair central spot of being made up of the first end A electrode (3a), the first end B electrode (3b) is in lamp holder (10) axis top low beam head (10) end, and another electrode pair central point of being made up of second termination electrode (4a), the first end B electrode (3b) then is on lamp holder (10) axis to be held away from lamp holder (10).

3, high-intensity discharge lamp electric arc tube according to claim 2, it is characterized in that: the first end A electrode (3a), the first end B electrode (3b) in the electric arc tube (1) are electrically connected with the first end A electrode outer lead (5a) that passes lamp holder (10), the first end B electrode outer lead (5b) respectively, and second termination electrode (4a) is electrically connected with the second termination electrode lead (6) that is folded to lamp holder (10).

4, high-intensity discharge lamp electric arc tube according to claim 1 is characterized in that: described electric arc tube (1) and first neck body (2a), the outer outer casing (7) that surrounds it that is provided with of second neck body (2b).

5, high-intensity discharge lamp electric arc tube according to claim 4, it is characterized in that: described outer casing (7) bottom is by first neck body (2a) of contraction position (7a) the banding electric arc tube (1) of its diameter contraction, on the outer wall at the non-contraction of outer casing (7) position of distance lamp holder (10) end face, be with retainer ring (8), support pin rod (9) one ends embedding lamp holder (10) end face that is no less than three is fixedlyed connected with lamp holder (10), supports pin rod (9) other end and fixedlys connected with the welding wing on the retainer ring (8) respectively.