Laparoscopic surgical devices having wire reducer
Laparoscopic surgical devices include a first member having a first gear, a second member having a second gear corresponding to the first gear, a connection member configured to connect the first member and the second member; first and second wire mounting pieces respectively at the first and second members, a first wire wound on the first wire mounting pieces so as to be pulled upon receiving a first drive force; and a second wire wound on the second wire mounting pieces so as to be pulled upon receiving a second drive force. The drive unit is configured to selectively transmit the first and second amplified driving forces to a respective one the first member and the second member to cause tilting of the first member and the second member.
1. A laparoscopic surgical device, the device comprising:
a first member having a first gear at a first side of the first member;
a second member having a second gear at a first side of the second member,
the second gear corresponding to the first gear, and
the second member being connected to the first member to enable tilting of the first member or the second member via movement of the first gear and the second gear engaged with each other;
a connection member configured to connect the first member and the second member to each other;
first wire mounting pieces respectively at the first member and the second member;
second wire mounting pieces respectively at the first member and the second member;
a first wire wound on the first wire mounting pieces so as to be pulled upon receiving a first amplified drive force from a drive unit; and
a second wire wound on the second wire mounting pieces so as to be pulled upon receiving a second amplified drive force from the drive unit,
the drive unit being configured to selectively transmit one of the first and second amplified driving forces to a respective one of the first member and the second member to cause tilting of the first member and the second member, wherein
if the first wire is pulled by the drive unit, the first member and the second member are configured to tilt respectively based on the first and second amplified driving forces applied to the first member and the second member, and
the first and second amplified driving forces correspond to N times a number of turns of the first wire and the second wire respectively wound on the first and second wire mounting pieces.
2. The device according to claim 1 , wherein if the first wire is pulled by the drive unit, a distance between the first wire mounting pieces is reduced as compared to before the first wire is pulled and a distance between the second wire mounting pieces is increased as compared to before the first wire is pulled.
3. The device according to claim 1 , wherein the second wire mounting pieces and the first wire mounting pieces are on opposite sides of the connection member.
4. The device according to claim 1 , wherein
a first side of the first wire is fixed to the first member and a second side of the first wire is fixed to the second member, and
a first side of the second wire is fixed to the first member and a second side of the second wire is fixed to the second member.
5. The device according to claim 1 , wherein
a first side of the connection member is connected to the first member, and
a second side of the connection member is connected to the second member.
6. The device according to claim 5 , wherein if one of the first wire or the second wire is pulled by the drive unit, the first member is configured to tilt relative to the second member via movement of the first gear and the second gear engaged with each other.
7. The device according to claim 1 , further comprising:
a plurality of guides protruding from an outer surface of the first wire mounting piece or an outer surface of the second wire mounting piece.
8. The device according to claim 7 , wherein the first wire or the second wire is configured to be wound so as to be located between at least one the neighboring guides.
9. The device according to claim 1 , wherein if the first wire is pulled by the drive unit, the second wire is configured to be selectively pulled toward the first member and the second member by a length equal to a pulled length of the first wire toward the drive unit.