| 摘要 |
<p>PURPOSE: To cope with demand of improvement in the quality of a key, and to reuse and divert a flat head by detachably bonding a shaft composed of a normal material with the head comprising a noble metal such as gold. CONSTITUTION: A flat head 2 is formed integrally of a noble metal such as gold or the like. A shaft 1 composed of a normal material is inserted into a slot 5 entered from the narrow side of the flat head 2, and bonded detachably. The bonding is attained by inserting pins 8 related to a small plate 7 installed to the flat head 2 into aligning holes 3, 4 formed to the shaft 1 and the flat head 2. When the key is made unnecessary, the old shaft 1 is removed from the flat head 2, and another shaft is inserted and used or the head 2 is diverted as the material of an article as another object.</p> |
