| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable stuck snow to be melted by raising the temperature of signal lamp lenses.SOLUTION: A mini-heat sink part 3 having a sufficient thermal capacity to be raised to a temperature to melt snow accretion and surrounded by cut grooves 2 (hereinafter referred to as slits) is configured in a heat sink unit comprising a heat sink tightly stuck to a lens for radiating heat from an LED and an LED substrate 6 over which the LED is installed; the heat generated from the LED installed in the mini-heat sink part is transmitted to the lens of a lamp tightly stuck to the mini-heat sink part and diffused to raise the temperature and thereby snow accretion over the lens is prevented.</p> |
