CN206441690U - Discharge lamp - Google Patents

Abstract

It can suppress the discharge lamp of defective insulation according to the utility model offer is a kind of.The discharge lamp radiates ultraviolet, and the Discharging lamps and lanternses are standby：Gas-tight container, has the sealing that a pair of electrodes is sealed with mode opposite each other at two ends, and the inside of the gas-tight container is hermetically sealed；Enclose the mercury and metal halide and rare gas in the inside of gas-tight container；Metal bar, is arranged at the side opposite with gas-tight container of a pair of electrodes；The second recesses of 1st recess of a part for lamp holder, its part for possessing covering sealing and metal bar and a part for covering wire, also, internal diameter R1 the internal diameter R2 more than second recesses, the external diameter RS of sealing of the 1st recess are more than the internal diameter R2 of second recesses.

Description

Discharge lamp

Technical field

Embodiment of the present utility model is related to a kind of discharge lamp.

Background technology

It is used as example, disclosing one kind in field of liquid crystal panel manufacture or print field to shone thing irradiation ultraviolet radiation With the discharge lamp for the light source for being exposed, solidifying, dry etc..

Patent document 1：Japanese Unexamined Patent Publication 2009-259790 publications

Discharge lamp has：The metal bar that is connected and is electrically connected with the inside of discharge lamp with a pair of electrodes, it is connected with metal bar And from the wire for being externally supplied electric power of discharge lamp.

For insulation purpose, the periphery of the connecting portion between metal bar and wire is provided with lamp holder, but according to manufacture Tolerance occurs in size on method, lamp direction of principal axis.If produce dimensional tolerance, from lamp holder outer end to lamp holder in wire untill Distance can not ensure to be enough to ensure that the distance of insulation sometimes.

The content of the invention

Embodiment of the present utility model provides a kind of discharge lamp for suppressing defective insulation.

A kind of discharge lamp for radiating ultraviolet is provided according to embodiment of the present utility model, it possesses：Gas-tight container, Have at two ends and the sealing of a pair of electrodes be sealed with mode opposite each other, and the gas-tight container inside by airtightly Sealing；Enclose the mercury and metal halide and rare gas in the inside of gas-tight container；Metal bar, be arranged at a pair of electrodes with The opposite side of gas-tight container；Lamp holder, it possess covering sealing a part and metal bar a part the 1st recess with And the second recesses of a part for covering wire, also, internal diameter R2s of the internal diameter R1 more than second recesses of the 1st recess, the sealing The external diameter RS in portion is more than the internal diameter R2 of second recesses.

According to embodiment of the present utility model, using the teaching of the invention it is possible to provide a kind of discharge lamp of suppression defective insulation.

Brief description of the drawings

Fig. 1 is illustrative for the schematic diagram of the discharge lamp 1 involved by the 1st embodiment.

Fig. 2 is the sealing 16 of the discharge lamp 1 involved by the 1st embodiment and the enlarged diagram of lamp holder 30.

In figure：1- discharge lamps, 10- gas-tight containers, 12- discharge spaces, 14- mercury and metal halide, 16- sealings, 20- Electrode, 22- axial woods, 24- coils, 26- paillon foils, 28- metal bars, 30- lamp holders, 40- wires.

Embodiment

Discharge lamp involved by embodiments described below radiates ultraviolet, and the Discharging lamps and lanternses are standby：Gas-tight container, Two ends, which have, is sealed with the sealing of a pair of electrodes in mode opposite each other, and the gas-tight container inside by airtightly close Envelope；Enclose the mercury and metal halide and rare gas in the inside of gas-tight container；Metal bar, be arranged at a pair of electrodes with gas The opposite side of close container；Lamp holder, it possess covering sealing a part and metal bar a part the 1st recess and Cover outside the second recesses of a part for wire, also, internal diameter R2 of the internal diameter R1 more than second recesses of the 1st recess, sealing Footpath RS is more than the internal diameter R2 of second recesses.

According to present embodiment, defective insulation can be suppressed.

In addition, in the discharge lamp involved by embodiments described below, the bearing of trend with sealing of second recesses Size L2 on parallel direction is more than 8mm.

According to present embodiment, it can more reliably suppress defective insulation.

Also, in the discharge lamp involved by embodiments described below, the internal diameter R1 of the 1st recess is 10~13mm.

According to present embodiment, it can more reliably suppress defective insulation.

Hereinafter, with reference to the accompanying drawings of the various embodiments of the utility model.

(the 1st embodiment)

Below, the discharge lamp 1 with reference to involved by Fig. 1 illustrates the 1st embodiment.Discharge lamp 1 is shown in Fig. 1.

As shown in figure 1, the discharge lamp 1 involved by present embodiment has：Gas-tight container 10, a pair of electrodes 20,20.

In the present embodiment, exemplified with the embodiment that metal halide lamp has been used as discharge lamp 1.

Gas-tight container 10 is formed as straight tube-like, has discharge space 12 in the inside of gas-tight container 10.Also, by gas The two ends of close container 10 form sealing 16,16, discharge space 12 are remained airtight.Gas-tight container 10 is by through ultraviolet Material is made, for example, be made up of quartz glass.The external diameter of gas-tight container is that 23~28mm, total length are 350~2100mm.

By applying electric power from a pair of discharge electrodes 20,20 to discharge space 12, make inclosure in the mercury of discharge space 12 and Metal halide 14 and rare gas are (not shown) luminous.It is, for example, 20~25mm, luminous length that discharge space 12, which is configured to internal diameter, It is, for example, 250~2000mm to spend (sparking electrode 20, the distance between 20).

Mercury 14 is enclosed in discharge space 12, and by the outside electric power applied from discharge lamp 1, is radiated for example 254nm, 365nm ultraviolet.In addition, when being applied with electric power from the outside of discharge lamp 1, mercury 14 helps to maintain to discharge.Putting When not being fed with electric power on electric light 1, mercury 14 in gas-tight container 10 most of exist in liquid form and a part with gas Form is present.The enclosed volume of mercury is, for example, 0.3~2.0 (mg/cm³)。

Metal halide 14 is enclosed in discharge space 12, and by the outside electric power applied from discharge lamp 1, is radiated Such as 375nm, 418nm different from mercury ultraviolet.When not being fed with electric power on discharge lamp 1, metal halide 14 exists It is most of in gas-tight container 10 to exist in solid form.Metal halide 14 is such as comprising iron, gallium.The inclosure of metal halide Amount for example, 0.03~0.15 (mg/cm³)。

Rare gas helps lend some impetus to electric discharge when discharge lamp 1 starts, and contributes to maintenance to discharge after electric discharge starts. The inclosure pressure of rare gas is, for example, 1~7 (kPa) under conditions of 25 DEG C.In addition, rare gas can be xenon, argon gas, Any one gas in neon, or can also be two or more mixed gas.

Sealing 16,16 is formed at the two ends of discharge space 12.Sealing 16,16 is by quartzy with the identical of gas-tight container 10 Glass is made.After sparking electrode 20,20 to be arranged to desired position, by using gas (not shown) under a reduced pressure The melting plants such as body burner are melted and sealedly so-called collapsed seal forms sealing 16,16.In addition, sealing 16th, 16 it can also be made up of quartz glass different from gas-tight container 10 etc..Also, can also be by based on pliers (not shown) Sealing 16,16 is formed Deng the so-called pinch seal of shaped device.The length of sealing 16,16 is, for example, 20~25mm, outer Footpath RS is, for example, 16~30mm.

The electric power come from the outside application of discharge lamp 1 is imported into discharge space 12 by a pair of discharge electrodes 20,20, so that Arc discharge is produced in discharge space 12.A pair of discharge electrodes 20,20 is arranged to a part and is embedded in sealing 16,16, and And the both ends of discharge space 12 are arranged in mode opposite each other.A pair of discharge electrodes 20,20 has：Axial wood 22,22；Line Circle 24,24；Paillon foil 26,26；Metal bar 28,28.

Axial wood 22,22 is used to apply electric power to discharge space 12.One end of axial wood 22,22 is prominent to discharge space 12, separately One end is embedded in sealing 16,16.And, on one end prominent to the side of discharge space 12 of axial wood 22,22 be provided with coil 24、24.In addition, the other end of axial wood 22,22 is connected by welding with paillon foil 26,26.Axial wood 22,22 is for example made up of tungsten.

Coil 24,24 is arranged at a side of axial wood 22,22, and coil 24,24 is put from the front end of the axial wood 22,22 in electric discharge Temperature is penetrated, so that the temperature for suppressing axial wood 22,22 rises.One end of coil 24,24 is arranged at a side of axial wood 22,22 (i.e., The side of discharge space 12), the other end is arranged at the another side of axial wood 22,22.Coil 24,24 is for example made up of tungsten.

Paillon foil 26,26 is embedded in sealing 16,16 and sealed by sealing 16,16, so that gas-tight container 10 be remained It is airtight.The other end of one end of paillon foil 26,26 and axial wood 22,22 is welded, the other end of paillon foil 26,26 and metal bar 28,28 One end is welded, and paillon foil 26,26 is embedded in sealing 16,16.Paillon foil 26,26 is for example made up of molybdenum.

A part for metal bar 28,28 is embedded in sealing 16,16, and the electrical connection gas-tight container 10 of metal bar 28,28 Inside and wire 40,40.One end of metal bar 28,28 and paillon foil 26,26 are welded, and the other end is connected with wire 40,40.Metal Rod 28,28 is for example made up of molybdenum.

Lamp holder 30,30 be arranged at gas-tight container 10 sealing 16,16, metal bar 28,28 and wire 40,40 it is outer Week, for preventing the connecting portion between metal bar 28,28 and wire 40,40 from exposing.Lamp holder 30,30 is for example made up of ceramics. In addition, in order that the chimeric of lamp holder 30,30 and gas-tight container 10 more firmly, can for example use adhesive in lamp holder 30,30 A part for fixed lamp holder 30,30 and sealing 16,16.

Wire 40,40 is used for the inside that power circuit (not shown) is electrically connected to gas-tight container 10.The one of wire 40,40 End is connected with the other end of metal bar 28,28, and the other end of wire 40,40 and power circuit etc. are connected.Wire 40,40 for example by Annealed copper wire is made.In addition, for easy connecting wire 40,40 and power circuit, can be set not in the other end of wire 40,40 The terminal of diagram.

The discharge lamp 1 of said structure is for example with so-called air cooling mode, i.e. obtain power supply and point in discharge lamp 1 The cooling wind that is conveyed when bright using pressure fan (not shown) etc. and cooled down.In addition, discharge lamp 1 can also use so-called Water-cooling pattern, i.e. cover discharge lamp 1 using the water collar (not shown) set in the way of surrounding discharge lamp 1, and utilize stream The liquid (specifically water) crossed inside water collar is cooled down.

Here, lamp holder 30 is described in more details with reference to Fig. 2.Fig. 2 be sealing 16, electrode 20, metal bar 28, The enlarged diagram of lamp holder 30, wire 40.

Lamp holder 30 be internally formed covering sealing 16 a part and metal bar 28 a part the 1st recess 32 And the second recesses 34 of a part for covering wire 40.The internal diameter R1 of 1st recess 32 is more than the internal diameter R2 of second recesses 34.Separately Outside, the external diameter RS of sealing 16 is more than the internal diameter R2 of second recesses 34.Also, it is preferred that the extension with sealing 16 of second recesses 34 Size L2 on the parallel direction in direction is more than 8mm.According to said structure, when sealing 16 is inserted in into lamp holder 30, i.e., Second recesses 34 will not also be reached by sealing 16 is contained in the 1st recess 32.Therefore, it is being applied with electricity from the outside of discharge lamp 1 During power, between sealing 16 and lamp holder 30, it is tightened up for be difficult between metal bar 28 and wire 40 produce dielectric breakdown And causing electric discharge, its result can suppress to produce defective insulation between discharge lamp 1 and lamp holder 30.Especially, if second recesses 34 Size L2 on the direction parallel with the bearing of trend of sealing 16 is more than 8mm, then between metal bar 28 and lamp holder 30 away from From extension, thus it is difficult to generation dielectric breakdown between metal bar 28 and wire 40 and causes electric discharge, its result can suppresses Defective insulation is produced between discharge lamp 1 and lamp holder 30.

In addition, the internal diameter R1 of the 1st recess 32 is preferably 10~13mm.By the way that the internal diameter R1 of the 1st recess 32 is set into 10~ 13mm, it is sufficient to fill the inorganic bond for keeping lamp holder.

In addition, in the case where forming sealing 16,16 by pinch seal, as long as prolonging from sealing 16,16 The longest edge for stretching sealing when being observed on the vertical section in direction is more than the internal diameter R2 of second recesses 34.Now, if will most Long side is set to RS, then the external diameter RS for being equal to sealing 16 is more than the internal diameter R2 of second recesses 34.According to said structure, with passing through Collapsed seal is identical during sealing 16,16 to be formed, when being applied with electric power in the outside from discharge lamp 1, in sealing 16 and lamp Between first 30, it is tightened up for be difficult between metal bar 28 and wire 40 produce dielectric breakdown and cause electric discharge, its result energy Enough suppress to produce defective insulation between discharge lamp 1 and lamp holder 30.

More than, some embodiments of the present utility model are illustrated, but these embodiments are merely illustrative, The intention of utility model scope is not limited.These new embodiments can be implemented in other various modes, not depart from In the range of the utility model objective, various omissions, displacement, change etc. can be carried out.These embodiments or its deformation are belonged to In scope or objective of the present utility model, and it is also contained in the utility model described in technical scheme and its equivalent scope It is interior.

Claims (3)

1. a kind of discharge lamp, it radiates ultraviolet, and the discharge lamp is characterised by possessing：

Gas-tight container, has the sealing that a pair of electrodes is sealed with mode opposite each other, and the gas-tight container at two ends Inside be hermetically sealed；

Enclose the mercury and metal halide and rare gas of the inside in the gas-tight container；

Metal bar, is arranged at the side opposite with the gas-tight container of a pair of electrodes, the other end of the metal bar is by leading Line is connected with power circuit；

Lamp holder, it possesses the 1st recess and the covering of the part for covering the sealing and a part for the metal bar The second recesses of a part for the wire, also, internal diameter R2s of the internal diameter R1 more than the second recesses of the 1st recess, institute The external diameter RS for stating sealing is more than the internal diameter R2 of the second recesses.

2. discharge lamp according to claim 1, it is characterised in that

Size L2 on the direction parallel with the bearing of trend of the sealing of the second recesses is more than 8mm.

3. discharge lamp according to claim 1 or 2, it is characterised in that

The internal diameter R1 of 1st recess is 10~13mm.