| 摘要 |
<p>This case is of the type composed of three elements made of mouldable or injectable plastic, namely a tubular body (2), a base (3) and a bottom piece (4). The tubular body (2) has a frustoconically narrowed assembly end (2a), the base (3) has a frustoconical bore (3b) of the same apex angle (A) as the narrowed end (2a) of the tubular body (2) for which it is intended to serve as a receptacle, and the bottom piece (4) has a frustoconical outer profile of the same apex angle (A) as the narrowed end (2a) of the tubular body (2) and as the bore (3b) of the base (3), the respective dimensions of the bore (3b) of the base (3) and of the bottom piece (4) being such that, after assembly, the annular gap separating them is of a width slightly smaller than the thickness of the narrowed end (2a) of the tubular body (2), means being provided to make it possible to assemble the base (3) and the bottom piece (4) by snapping. <IMAGE></p> |
