NEEDLE ASSEMBLY AND LIQUID MEDICINE INJECTION APPARATUS COMPRISING SAME
A needle assembly includes a needle, a cannula into which the needle is inserted, a driving member generating driving force to move the needle and the cannula, and a holder on which the driving member is supported, in which the holder rotates to move the needle and the cannula in a direction, and the holder further rotates to move the needle in another direction.
1 . A needle assembly comprising:
a needle;
a cannula into which the needle is inserted;
a driving member generating driving force to move the needle and the cannula; and
a holder on which the driving member is supported,
wherein the holder rotates to move the needle and the cannula in a direction, and the holder further rotates to move the needle in another direction.
2 . The needle assembly of claim 1 , further comprising:
a first sliding member to which the needle is fixed; and
a second sliding member to which the cannula is fixed and which is disposed adjacent to the first sliding member,
wherein the holder is connected to the first sliding member.
3 . The needle assembly of claim 2 , further comprising
a catching member disposed on a movement path of the first sliding member and the second sliding member, wherein the second sliding member is caught and fixed to the catching member.
4 . The needle assembly of claim 2 , wherein the holder comprises, on a bottom surface thereof, a holder projection protruding downwardly, and
the first sliding member comprises, on a surface thereof, a curved first slot hole into which the holder projection is inserted.
5 . The needle assembly of claim 4 , further comprising a sliding rail providing a movement path for the first sliding member and the second sliding member,
wherein the sliding rail comprises, on a surface thereof, a curved second slot hole into which the holder projection is inserted.
6 . The needle assembly of claim 5 , wherein the holder projection moves circularly along the first slot hole and the second slot hole.
7 . A liquid medicine injection apparatus comprising:
a base body;
a reservoir unit mounted on the base body and storing medical liquid;
a needle assembly mounted on the base body and injecting medical liquid into a body of a user; and
a driving module connected to the reservoir unit to transfer the medical liquid of the reservoir unit to the needle assembly,
wherein the needle assembly comprises:
a needle;
a cannula into which the needle is inserted;
a driving member generating driving force to move the needle and the cannula; and
a holder on which the driving member is supported,
wherein the holder rotates to move the needle and the cannula in a direction, and the holder further rotates to move the needle in another direction.