| 摘要 |
There is provided an easily operated self-retaining needle capable of surely preventing accidental sticking of an inner needle, and touching to blood, humor or the like adhered to the inner needle. This self-retaining needle comprises an outer needle 2, an outer needle hub 4, an inner needle 3 and an inner needle hub 6. An enveloping member 8 is provided for connecting a support member 7 for supporting the outer needle hub 4 with the inner needle hub 6, and enveloping a front of the inner needle 3. In the enveloping member 8, a front portion 10 and a rear portion 12 are freely folded. When a knife point portion 5 is protruded from a tip of the outer needle 2, the front portion 10 and the rear portion 12 are folded, and the rear portion 12 is housed between the inner needle hub 6 and the front portion 10. When the inner needle 3 is retreated toward the rear of the outer needle hub 4, the front portion 10 and the rear portion 12 are expanded along both side faces of the inner needle 3. When a front portion 23 and a rear portion 24 are expanded along both side faces of the inner needle 3, an enveloping member 22 envelops the inner needle 3 by the front portion 23 and the rear portion 24.
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