| 摘要 |
A tungsten-halogen quartz lamp with a structure for preventing glass-bead supporter from breaking off, which can insure that its glass-bead supporter could not leave and drop from the top of a bulb in any case, so that reliability of a holding-filament structure is greatly improved and the service life of the lamp is prolonged. For this purpose, a concave-baking ring is provided at the circumference of the bulb, which corresponds to a position below the glass-bead supporter which is mounted in the upper of inner-cavity of the bulb in a horizontal direction, to restrict the glass-bead supporter to the upper of the bulb.
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