| 摘要 |
<p>A safe vein indwelling needle includes an indwelling soft needle (21), a puncture steel needle (24), a steel needle base (25), a handle (3) and a needle sleeve (5). A center through hole (56) is provided in the needle sleeve (5) for containing the puncture steel needle (24) and the steel needle base (25), each of the two sidewall (52,53) of the needle sleeve (5) is provided with a sliding recess (54a,54b) symmetrically, the two sliding recesses (54a,54b) are opened at the rear end of the sidewall of the needle sleeve (5), lockpins(55a,55b) are provided symmetrically adjacent to the rear end of the sliding recess (54a,54b). The handle (3) includes a canal (31) communicated to the steel base (25) and two holding portions (32a,32b) provided at two sides of the canal (31), the canal (31) connects to each holding portion (32a,32b) through a sliding rail (38a,38b) sliding in the sliding recess (54a,54b) of the needle sleeve (5), each of the two sliding rail (34a,34b) is provided a lockhole (37a,37b) matching to the lockpin (55a,55b). When the puncturing is finished, the handle (3) slides backward, the tip of the puncture steel needle (24) hides in the center through hole (56) after the lockpin (55a,55b) fall into the lockhole (37a,37b) of the sliding rail (38a,38b).</p> |
