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Discharge lamp

A technology for discharge lamps and discharge vessels, which is applied to discharge lamps, gas discharge lamps, high-pressure discharge lamps, etc., can solve the problem of electrode main body 1051 falling, and achieve the effects of preventing axis deviation, good bonding state, and preventing breakage

Inactive Publication Date: 2010-01-06
USHIO DENKI KK
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  • Abstract
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  • Application Information

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Problems solved by technology

However, since the screw connection 1053 is also a bond between metals, the bond may loosen due to impact and vibration. If the looseness is ignored, the electrode main body 1051 may fall, so it is necessary to securely connect the electrode main body 1051 and the The electrode shaft part 1052 is connected to improve reliability and safety

Method used

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Embodiment Construction

[0033] use Figure 1 to Figure 7 Embodiments of the present invention will be described.

[0034] figure 1 It is a partial cross-sectional view showing the structure of the short-arc discharge lamp 1 according to the invention of the present embodiment.

[0035] as it should figure 1 As shown, the discharge vessel 2 of the short-arc discharge lamp 1 is formed of quartz glass, and is composed of an elliptical luminous tube 3 and a cylindrical sealing tube 4 continuously extending from both ends of the luminous tube 3 to the outside. A portion of the sealing tube 4 where the arc tube 3 is continuous is formed with a reduced-diameter portion 41 in which a part of the sealing tube 4 has a reduced diameter. In the arc tube 3 of the discharge vessel 2, the anode 5 and the cathode 6 are arranged facing each other. The electrode main bodies 51, 61 of these electrodes 5, 6 are respectively made of tungsten, and are respectively fixedly supported by the front ends of columnar elec...

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Abstract

Provided is a discharge lamp with high reliability, having an electrode jointing structure for jointing an electrode main body and an electrode axis part simply and stably, and capable of preventing the electrode main body from dropping from the electrode axis part. In an inner space of a discharge container formed by setting seal tubes on two ends of a light-emitting tube continuously, a pair of opposite electrodes are provided in an axial direction of the light-emitting tube, the electrode has the electrode main body (51) and the electrode axis part (52), the electrode main body having a approximately cylindrical main body part connected with a front end part, the front end part of the electrode axis part is provided with an external thread part (522), a dent inner wall formed on a rear end part of the electrode main body is provided with an internal thread part (512), the electrode main body and the electrode axis part are connected with each other by spiraling, a metal member (7) is clipped between the internal thread part of the electrode main body and the external thread part of the electrode axis part, and a part of the metal member is configured in a flowed head state.

Description

technical field [0001] The present invention relates to a discharge lamp, and in particular to a short-arc discharge lamp used as a light source for exposure of semiconductor elements, liquid crystal elements, printed circuit board elements, etc., or as a light source of a projection device for projection. Background technique [0002] Discharge lamps used in the above technical fields are described in, for example, Patent Documents 1 and 2. [0003] Figure 8 It is a partial cross-sectional view showing the structure of the short-arc discharge lamp described in Patent Documents 1 and 2. FIG. [0004] as it should Figure 8 As shown, the discharge vessel 102 of the short-arc discharge lamp 101 is continuously provided with sealing tubes 104 extending outward at both ends of the luminous tube 103 . Inside the arc tube 103, a pair of electrodes 105 and 106 are arranged facing each other with a predetermined interval therebetween. Electrode main bodies 1051 , 1061 of electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/073
CPCH01J61/04H01J61/0732H01J61/0735H01J61/26H01J61/366H01J61/544H01J61/86
Inventor 寺口贤二北野洋好
Owner USHIO DENKI KK
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