Heater lamp

Abstract

The invention provides a halogen lamp (100) comprising a glass bulb (11), a filament (12) inserted inside the bulb, a pair of metal foils (151, 152), and a pair of outer leads (161, 162). Each metal foils has one end welded to the filament and the other end welded to the outer lead. The metal foils are contained in glass sleeves and the metal foils and the sleeves are inserted inside the bulb. The bulb is heated and softened. The pressure inside the bulb is reduced, and consequently the bulb is contracted to seal in the metal foils inside. Since the amount of glass of each formed sealing part is larger than the other parts of the bulb by the sleeves, the shape of the sealing parts are stabilized.

Description

technical field [0001] The present invention relates to a heater lamp used for toner fixing and the like in copiers, printers, etc., and more particularly, realizes saving of installation space while simplifying the installation of the heater lamp. Background technique [0002] In Japanese Patent Application Laid-Open No. 9-320547 (Prior Art 1), it is considered possible to use a sealing portion of a halogen lamp for fixing in a copier to prevent oxidation and peeling of the metal foil for sealing, and to eliminate the need for a tip for gas sealing, etc. Type tube (Japanese: チツププ tube) such a decompression method for sealing. [0003] In the prior art 1, the wall thickness of the lamp tube is about 1mm because it needs to reduce the heat capacity and improve the efficiency of the lamp. With such a wall thickness of the lamp tube, there is a problem that the shrinkage of the lamp tube caused by the metal foil cannot be suppressed, and the sealing part becomes flat, or the s...

AI Technical Summary

Problems solved by technology

With such a wall thickness of the lamp tube, there is a problem that the shrinkage of the lamp tube caused by the metal foil cannot be suppressed, and the sealing part becomes flat, or the sealing state is unstable, and the pressure is increased. The deviation between the centerline of the large sealing part and the centerline of the lamp tube causes the disadvantage that the lamp tube cannot be installed in parallel

[0010] In prior art 4, because the shape of the sealing part is larger than the outer diameter of the lamp tube, it is not perpendicular to the lamp tube, the sealing part is bent, the left and right sealing parts are bent, and the row There are problems such as deformation and bending of the lamp tube at the connection part of the gas pipe, so the intersection of the base member cannot be enlarged, and the cover cannot be covered. When it is fixed by ceramics, cement, etc., it will bend or the cement will be exposed, and the cement powder will fall off.

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