| 摘要 |
<p>A syringe barrel (1) has a hollow distal projection (7) to which a needle (10) is attached. A hub (11) is used to attached the needle (10) to the barrel (1). The hub (11) has a distal part (12) to which the needle (10) is fixed, and a proximal part (14) for attachment to the barrel (1). The proximal part (14) includes a bore (15) for receiving the projection (7) and an outwardly-extending flange (16). The syringe barrel (1) has a collar (9) surrounding and spaced from the projection (7) to define a space for receiving the proximal part (14) of the hub (11). The internal surface of the collar (9) includes a single outwardly-extending locking projection (19), arranged so that the flange (16) engages its pro ximal side to lock the hub (11) to the barrel (1). The locking projection (19) has a shallow lead-in ramp (20) on the distal side, a more steeply-angled ramp (21) on the proximal side, and a cylindrical surface (22) separating the ramps (20, 21). The projection (19) fixes the hub (11) to the barrel (1) so it is difficult, if not impossible, to remove.</p> |
