发明名称 HEAD LAMP FOR AUTOMOBILE
摘要 <p>PURPOSE:To obtain an automobile head lamp provided with a level having less measurement error even by any temperature of the circumferential atmosphere of the level by applying a heat releasing grease onto the outer circumference of a bubble tube received in the casing of the level. CONSTITUTION:A heat releasing grease 100 having a satisfactory heat conductivity is applied onto the outer surface of a bubble tube 80 except the scale formed surface thereof, and the heat releasing grease 100 smooths the difference in the conducted heat quantity in each area. Namely, the highly heat conductive heat releasing grease 100 conducts the heat quantity of the same degree as that in the area having a short heat conducting passage to the area having a long heat conducting passage, so that the difference in the heat quantity conducted to each area of the bubble tube 80 is minimized. Thus, the quantity of heat conducted to the bubble tube 80 is longitudinally uniformed, reducing the temperature difference between front and rear end parts of the bubble tube 80. Therefore, in the bubble tube 80, no convection resulting from the temperature difference is generated, and movement of bubbles is hardly present.</p>
申请公布号 JPH03203114(A) 申请公布日期 1991.09.04
申请号 JP19890338386 申请日期 1989.12.28
申请人 KOITO MFG CO LTD 发明人 OTSUKA YASUSHI
分类号 G01C9/26;B60Q1/06;F21S8/10;F21V14/04;G01C9/32 主分类号 G01C9/26
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