Fluorescent lamp and base
AssigneeOsram-Melco Limited
InventorsMitsuhiro Ikeda, Takashi Osawa, Masaomi Takeda, Koji Kokufu
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Abstract
At the end of life of a fluorescent lamp having a base to which a pin is press-fitted, it is an object to prevent the pin from dropping or slanting, etc. A fluorescent lamp includes a base having a base body and a pin press-fitted to a hole formed on the base body. A pin retaining force (a pin torque of the base) Fe after use by which the base body retains the pin is at least 0.08 Nm after the fluorescent lamp is burned for a rated life, and a rate Fe/Fi of an initial pin retaining force Fi by which the base body retains the pin before use of the fluorescent lamp and the pin retaining force Fe after use is at least 0.66.
Claims3
A fluorescent lamp comprising:
- a base having a base body made of thermoplastic resin, a bole provided on the base body, and a pin press-fitted to the hole,
- wherein the thermoplastic resin contains white pigment of at least 0 wt % but no more than 3 wt % and glass filler of at least 5 wt % but no more than 30 wt %.
The base of claim 20, wherein a rate Dh/Dp of a hole diameter Dh of the hole formed on the base body and an outer diameter Dp of the pin is at least 0.89 but no more than 0.99.
A base comprising a base having a base body and a pin press-fitted to a hole provided on the base body,
- wherein a rate Fe/Fi of an initial pin retaining force (a pin torque of the base) Fi by which the base body retains the pin before a fluorescent lamp is used and a pin retaining force Fe after use by which the base body retains the pin after the fluorescent lamp is burned for a rated life is at least 0.66.
Dependencies are inferred from the claim text.