WO2005045880A1

WO2005045880A1 - A highstrength discharge lamp with low glare and high efficiency for vehicles

Info

Publication number: WO2005045880A1
Application number: PCT/CN2004/000429
Authority: WO
Inventors: Guosheng Chai; Zhengming Yang; Guangyi Gao; Ming Zhang
Original assignee: Guosheng Chai; Zhengming Yang; Guangyi Gao; Ming Zhang
Priority date: 2003-11-06
Filing date: 2004-04-29
Publication date: 2005-05-19
Also published as: JP2006515107A; EP1681707A1; EP1681707A4; KR20060101514A; CA2534009A1; CA2534009C

Abstract

The invention provides a high strength discharge lamp with a lamp cap, which has a simple and firm structure, higher thermal stability, low glare and high efficiency. The discharge lamp comprises an arc tube which filled with ionized substances. The arc tube comprises a bulbous or ellipsoidal portion. Surrounding the arc tube is a tubular shroud, the shroud has an enlarged portion which is similar to the bulbous or ellipsoidal portion disposed about the bulbous portion of the arc tube The distance between the shroud and the outer wall of the arc tube is even, so that it makes the temperature of the arc tube more even, and thermal stability and photoelectric parameter of the lamp are improved. The invention can reduce the times of the reflection which occurred between the inner wall of the shroud and the outer wall of the arc tube, thereby more light are directly radiated out of the shroud and the invention can also reduce the occurance of veilling glare.

Description

High-efficiency low-glare vehicle high-intensity discharge lamp

Technical field

The utility model relates to a high-intensity discharge lamp for a vehicle with a lamp cap.

Background technique

Existing high-intensity discharge lamps with lamp caps are generally structured as follows: a gas-tight or ellipsoid-shaped gas discharge arc tube made of high-purity quartz glass and filled with ionizable substances is provided at two ends of the arc tube; There is a neck portion that is contracted and sealed at a diameter of 180 degrees to each other. In order to ensure the stability of the arc tube, the arc tube and the neck body are also provided with a cover. The cover is made of a UV-absorbing quartz material, which can be air-tight or non-air-tight. The conductors connected to the pair of electrodes of the arc tube respectively extend through the corresponding end neck body to extend out of the arc tube and the casing. The lead near the lamp cap is electrically connected to the power connection terminal provided on the lamp cap, and the other end leads from the shell. The outside is folded towards the lamp cap and electrically connected with another power connection terminal on the lamp cap. The housings of the existing high-intensity discharge lamps for vehicles are straight, and the arc tube is similar to a sphere or ellipsoid, and the distance between the arc tube and the tubular casing is very small, which makes the distance between the arc tube and the casing very different. Uniform. On the one hand, it will cause uneven temperature of the arc tube and affect the thermal stability. On the other hand, when the light radiated by the arc tube reaches the inner wall of the tubular casing, the incident angle will be larger and a part of the light will pass out of the casing. The other part of the light will be scattered around and to the ends after being reflected multiple times between the inner wall of the straight tube housing and the outer wall of the arc tube (see Figure 3). This not only reduces the light utilization rate, but also makes the light distribution The curve and the light-condensing effect of the luminaire are degraded, resulting in a large glare. Most of the products of the existing structure insert the arc tube cover deeply into the lamp cap and fix it with glue. The disadvantage is that it is not strong enough and it can easily cause the lower part of the bulb to be broken. In some cases, a metal fixing part is provided on the lamp cap. The fixing part is welded and connected with the metal ring of the tight-closing shell. The structure of this connection method is relatively complicated, the installation is complicated, and the price is high.

Summary of the invention The purpose of the utility model is to provide a high-intensity discharge lamp for a vehicle with a lamp cap, which has a simple and firm structure, convenient installation, high light utilization ratio, good thermal stability, and low glare, and can further improve its seismic performance.

To achieve the above purpose, the utility model adopts the following technical solutions:

A high-efficiency, low-glare high-intensity discharge lamp for a vehicle, comprising: an arc tube similar to a spherical or ellipsoidal airtight type and filled with an ionizable substance; two ends of the arc tube are provided with two diameters at an angle of 180 degrees to each other A first neck body and a second neck body that are contracted and sealed. The first electrode and the second electrode in the arc tube are electrically connected to the first electrode lead and the second electrode lead outside the tube through the conductors in the corresponding end neck, respectively, and the first electrode lead is connected to the first power source provided on the lamp cap at the same end. The connection end is electrically connected, the second electrode lead is folded back to the lamp cap direction and is electrically connected to the second power connection end in the lamp cap direction. The arc tube and the neck body are provided with a cover surrounding the same, and the position of the cover corresponding to the arc tube is the same. It is a spherical bulb or ellipsoid that bulges outward and is similar to an arc tube, and the wall surfaces of the two are approximately parallel spherical bulbs.

——The upper end of the second neck body is a trumpet-shaped conical surface with a concave center, and the outer edge of the trumpet-shaped conical surface is fused and connected to the casing.

——The lamp cap is an integral structure formed by injection molding of an insulating material. The first neck of the arc tube and the extended part of the outer casing are embedded in the front end surface of the lamp cap and fixed with the lamp cap through an adhesive. There are no less than three embedded and fixed support pins on the front surface. The embedded ends of each support pin are equally spaced on the circumference concentric with the lamp housing, and the other protruding ends are respectively sleeved on the housing. The corresponding welding wings on the metal clamping ring are fixedly connected.

The distance between the cover of the utility model and the wall of the quasi-spherical arc tube is relatively uniform, so that the temperature distribution of the arc tube can be uniform, and the thermal stability of the lamp is improved, so that the photoelectric parameters of the lamp are more stable, and Extend lamp life. At the same time, due to the tube wall of the corresponding part of the cover and the arc tube, The arc tube-like spherical tube wall is nearly parallel, and the light emitted when the arc tube is ignited is nearly perpendicularly incident on the inner wall surface of the casing, so that more light can be radiated directly through the casing (see Figure 2), reducing The stray light that is reflected multiple times between the inner wall of the housing and the outer wall of the arc tube and is scattered to the surroundings and ends is used to improve light utilization and reduce glare. In addition, the diameter of the straight portions at both ends of the shell bulb of the utility model is reduced, the weight is reduced, and the overall seismic performance is improved.

The lamp cap of the utility model can be cast and formed by using a high temperature and high pressure resistant insulating material, and the root of the supporting pin is embedded and fixed in the lamp cap mold during molding. The socket of the arc tube neck body and the shell must be reserved at the front end surface of the lamp cap. When assembling, the first neck body of the arc tube and the extension of the shell are inserted into the socket of the front surface of the lamp cap, and fixed with high temperature resistant inorganic glue, and then the root The support pin rod embedded in the lamp holder is welded and fixed with a metal clamping ring welding wing sleeved on the outer shell. The arc tube, the cover, and the lamp cap of the utility model are fixed with glue and a supporting frame composed of a clamping ring and a supporting pin, which can significantly enhance the vibration and shock resistance of the lamp, and has a structure. Simple, easy to assemble and low cost. In the utility model, the upper end of the arc tube is formed into a horn shape and then connected with the cover sealing, which can reduce the glare scattered on the upper end, shorten the overall height of the lamp body, reduce the weight of the lamp tube, improve the shock resistance, and easily pass the traditional sealing. Process production and processing. The utility model is particularly suitable for vehicle headlights, and can also be used for lighting of vehicles such as locomotives and airplanes or as a special projection light source and used underwater, mines, kitchen windows and other places with higher lighting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic diagram of light radiation propagation between an arc tube and a cover of the present invention.

FIG. 3 is a schematic diagram of light radiation propagation between a prior art arc tube and a straight cylindrical casing.

FIG. 4 is a schematic diagram of the A-direction structure of FIG. 1.

FIG. 5 is a schematic structural diagram of the lamp cap, the supporting pin rod, and the reinforcing ring of FIG. 1. FIG. 6 is a schematic structural diagram of a clamping ring in FIG. 1.

FIG. 7 is a schematic structural diagram of the clamping ring 10 composed of two semi-circular metal rings in FIG. 1. FIG. 8 is a schematic structural diagram of a clamping ring 10 composed of four quarter-circle arc rings in FIG. 1. FIG. 9 is a schematic structural diagram of another embodiment of the lamp cap of FIG. 1.

detailed description

The following further describes the present invention in detail with reference to the drawings and specific embodiments. The parts of the present invention include: arc tube 1, first neck body 2a, second neck body 2b, first electrode 3a, second electrode 3b, first An electrode lead-out wire 4a, a second electrode lead-out wire 4b, a housing 5, a bulb 5a in the middle of the housing, a first electrode lead 6, a second electrode lead 7, a connection between the second electrode lead and the second electrode lead 8. Porcelain sleeve outside the second electrode lead-out 9, clamping ring 10, welding wing 10a, half-circle welding wing 10b, support pin 11, reinforcement pin 12, external end of the first electrode lead 13, The external terminal 14 of the second electrode lead-out wire, the lamp cap 15, the plug post 15a, the cylindrical groove 16, and the center socket 17.

In this embodiment, the arc tube 1 has a substantially ellipsoidal shape. The two ends of the arc tube are provided with a first neck body 2a and a second neck body 2b which are contracted in diameter at an angle of 180 degrees to each other. Both neck bodies are in a sealed state. The arc tube 1 The first electrode 3a and the second electrode 3b inside the first electrode lead-out wire 4a and the second electrode lead-out wire 4b made of molybdenum sheet and molybdenum rod material which are sealed at the center of the corresponding end neck body respectively extend out of the arc tube and It is electrically connected to the first electrode lead 6 and the second electrode lead 7, and the two electrode leads are respectively electrically connected to the first power connection terminal 13 and the second power connection terminal 14 provided on the lamp cap. The arc tube 1 is hermetically connected to the diameter-constricted portion of the lower portion of the casing 5 provided outside the neck body 2a. The upper end of the second neck body 2b is formed with a concave center-shaped flared conical surface 2c. The cover 5 is hermetically connected.

Lamp base 15 is an integrated structure that is pressed and formed with high temperature and high voltage insulation materials.

The first neck body 2a of 1 and the extension of the cover 5 are both embedded in the cylindrical groove at the center of the end face of the base 15 16 ', and fixed to the base 15 by high temperature resistant inorganic glue. A metal clamping ring 8 is sleeved on the outer wall below the lower end of the shroud. The metal clamping ring 8 is provided with four outwardly extending welding wings 10a and half-ring welding wings 10b. The welding wings 10a and 10b are respectively connected to the protruding ends of the corresponding support pin rods 11 embedded in the end face of the base 15 in a fixed manner, and the embedded ends of the support pin rod 11 are on the end face of the base 15 and present with the cover 5 The concentric circles are arranged on the circumference with a radius larger than that of the cover 5.

The metal clamping ring 10 can be composed of two half-ring metal rings (see FIG. 7). Each half-ring metal clamping ring is provided with a welding wing 10a protruding in the middle and an eyelet at the outer end. Two ends of the metal clamping ring are provided with a semi-circular welding wing 10b which extends outward and has half holes at the outer end. The two semi-circular metal rings form a closed metal clamping ring 10 to clamp the outer wall of the casing 5. The clamping ring 10 may also be composed of four quarter-circle arc rings, as shown in FIG. 8, or a whole ring made of a whole metal strip (see FIG. 6). The lower part of the support pin may also be Adding a welding ring to make it a whole, thereby further improving the overall stability and shock resistance of the discharge lamp.

The rear part of the base 15 is provided with a stepped plug 15a with a reduced diameter. The first electrode lead 6 is inserted through the base 15 from a reserved central socket 17 located at the center of the cylindrical groove at the front end of the base 15 and from the rear of the base 15 The central insertion hole 17 of the insert rod provided on the central axis of the internal cavity of the insert post 15a is protruded, and is electrically connected to the first power connection end 13 sheathed outside the insert rod, and protrudes from the second electrode bow of the second neck body 2b. The I outlet 4b is turned to the lamp cap after being led out of the arc tube, and is connected to the second electrode lead 7 through the connector 8 through the hole on the lamp cap in a direction substantially parallel to the arc tube axis to be electrically connected to the external terminal 14. The second electrode lead 7 is covered with a porcelain insulating conduit 9, and the lower end of the porcelain tube 9 is inserted into the lamp cap and fixed with insulating glue.

The spherical bulb 5a in the middle of the shell 5 corresponding to the spherical bulb-like shell of the arc tube 1 is provided with a spherical bulb-like bulb that bulges outward and is approximately parallel to the bulb surface of the arc tube 1. And usually Compared with the straight cylindrical shell used, this structure makes the distance between the bulb 5a in the middle of the shell of the shell 5 and the parts of the arc tube 1 more uniform, so the temperature of the arc tube 1 is more uniform, and the thermal stability of the lamp And the photoelectric characteristics are improved, and the lamp life can be extended. More importantly, because the cover 5a is provided with a curved surface nearly parallel to the outer wall of the arc tube 1, the light emitted when the arc tube 1 is ignited is perpendicular to the inner wall surface of the bulb 5a in the middle of the cover, so that more light can be directly directed Radiation is emitted through the bulb 5a in the middle of the casing 5 (see FIG. 2). In the case of a straight tube casing, when the light radiated by the arc tube reaches the surface of the casing, due to the large incident angle, a part of the light The multiple reflections between the inner wall of the cover 5 and the outer wall of the arc tube 1 result in stray light to the surroundings and ends (see Figure 3). Obviously, the present invention improves the light utilization rate and reduces glare.

Claims

Claim

1. A high-efficiency, low-glare high-intensity discharge lamp for a vehicle, comprising: an arc tube (1) similar to a sphere or ellipsoid and filled with an ionizable substance, and the two ends of the arc tube (1) are provided with 180 to each other The first neck body (2a), the second neck body (2b), and the first electrode (3a) and the second electrode (3b) inside the arc tube (1), which are contracted and sealed by a degree of angle, respectively pass through the corresponding end neck bodies. The conductive body is electrically connected to the first electrode lead (6) and the second electrode lead (7) protruding from the tube, and the first electrode lead (6) is connected to the first power supply terminal of the lamp cap (15) provided at the same end. (13) The electrical connection is made, and the second electrode lead (7) is folded toward the lamp cap (15) and electrically connected to the second power connection terminal (14) on the lamp cap (15). The arc tube (1) and the neck body are provided with a cover (5) surrounding the arc tube, which is characterized in that: the cover (5) corresponds to a bulb portion of the arc tube (1) similar to a spherical or ellipsoidal shape. A spherical bulb (5a) in the middle of the shell which is bulged outward and is nearly parallel to the wall surface of the arc tube (1) is provided at the part.

2. The high-efficiency, low-glare high-intensity discharge lamp for a vehicle according to claim 1, characterized in that: the lamp cap (10) is an integral structure cast-molded from an insulating material, and the first neck body (2a) of the arc tube and the sleeve The extension of the outer cover (5) is embedded in the front end surface of the lamp cap (15) and fixed to the lamp cap (15) by an adhesive. The front surface of the lamp cap (15) is provided with not less than three embedded and fixed The supporting pin (11), the embedded ends of each supporting pin (11) are evenly distributed on the circumference concentric with the casing, and the other protruding ends are respectively connected with the metal clamping ring (10) sleeved on the casing (5). The corresponding welding wing (10a) or semi-circular wing (10b) on) is fixedly connected.

3. The high-efficiency low-glare vehicle high-intensity discharge lamp according to claim 1, characterized in that: the upper end of the second neck body (2b) is a horn-shaped conical surface (2c), a horn-shaped conical surface having a concave center.

(2c) The outer edge is sealed with the cover (5).

4. The high-efficiency, low-glare high-intensity discharge lamp for a vehicle according to claim 2, wherein: The metal clamping ring (10) is formed by buckling and combining two semi-circular metal rings. Each half of the semi-circular metal clamping ring is provided with a welding wing (10a) protruding outward and an eyelet at the outer end. The two ends of the metal clamping ring are provided with a semi-circular welding wing (10b) extending outward and a half hole at the outer end. The two semi-circular metal rings constitute a closed metal clamping ring (10) and a clamping cover (5). Outer wall.

5. The high-efficiency low-glare vehicle high-intensity discharge lamp according to claim 1, characterized in that the cross section of the first neck body (2a) of the arc tube and the extension of the cover (5) are concentric circles. Are embedded in the cylindrical groove (16) at the center of the end face of the lamp cap (15), and fixed to the lamp cap by a high temperature resistant inorganic glue.

6. The high-efficiency and low-glare high-intensity discharge lamp for a vehicle according to claim 1, characterized in that: the cover (5) provided outside the neck body of the arc tube (1) passes through a diameter-shrink portion or neck of the cover. The horn parts of the body are hermetically sealed to each other.

7. The high-efficiency and low-glare high-intensity discharge lamp for a vehicle according to claim 1, characterized in that: a stepped insertion post (15a) with a reduced diameter is provided at the rear of the lamp cap (15), and a first electrode lead

(6) The reserved central jack located at the center of the cylindrical groove at the front end of the lamp holder (15). (17) Inserted through the lamp holder (15), the lower part is set on the central axis of the inner cavity at the rear end of the plug holder. The central socket (17) of the plunger sticks out, and is electrically connected to the first power connection end (13) sheathed outside the plunger, and the second electrode lead wire (4b) of the second neck body (2b) is folded. The lamp cap is connected to the second electrode lead (7) via the connector 8 and passes through the small hole in the lamp cap (15) in a direction substantially parallel to the central axis of the arc tube (1) and is welded to the outer end ring of the second electrode. The electrode lead-out wire (7) is covered with an insulated conduit (9).