Electrode device for blocking or controlling nerves in body
An electrode apparatus for nerve denervation or modulation in vivo includes a main body including a shaft; an electrode unit formed to be drawn out from one end of the shaft and configured to denervate or modulate at least some of nerves on a tube in the body; an electrode guide including a plurality of joint units and a wire connecting the plurality of joint units to each other and configured to guide the electrode unit; and a driving unit located inside the main body and configured to drive the joint units and the wire to protrude from the one end of the shaft. The driving unit drives the joint units in conjunction with the wire to have different displacements by using a gear ratio between two rack gears depending on a pitch circle diameter ratio between two pinion gears.
1 . An electrode device for nerve denervation or modulation in vivo, comprising:
a main body including a shaft;
an electrode unit formed to be drawn out from one end of the shaft and configured to denervate or modulate at least some nerves on a tube in the body;
an electrode guide including a plurality of joint units and a wire connecting the plurality of joint units to each other and configured to guide the electrode unit; and
a driving unit located inside the main body and configured to drive the joint units and the wire to protrude from the one end of the shaft,
wherein the driving unit drives the joint units in conjunction with the wire to have different displacements by using a gear ratio between two rack gears depending on a pitch circle diameter ratio between two pinion gears.
2 . The electrode device of claim 1 ,
wherein the driving unit includes:
a motor unit;
a rod block including a rod of which one end is connected to the joint units and which is moved in the forward and backward directions by means of the motor unit; and
a wire block configured to support wire and move in the forward and backward directions in parallel to the rod block, and wherein
when the rod block is moved in the forward direction, a distance between the rod block and the wire block increases, and when the rod block is moved in the backward direction, the distance between the rod block and the wire block decreases.
3 . The electrode device of claim 1 ,
wherein the driving unit includes:
a rod block of which one end is connected to the joint units and which is moved in forward and backward directions;
a wire block configured to support the wire and moved in the forward and backward directions; and
a variable connection unit including the two pinion gears and the two rack gears corresponding to the two pinion gears and configured to connect the rod block and the wire block to each other and vary a distance between the rod block and the wire block.
4 . The electrode device of claim 3 ,
wherein the two rack gears include a rod rack fixed to the rod block and a wire rack fixed to the wire block,
the two pinion gears include a rod pinion that converts rectilinear movement of the rod rack into rotational movement and a wire pinion that forms rectilinear movement of the wire rack while rotating with the rod pinion, and
the rod pinion and the wire pinion are coaxially rotated around a fixed pinion shaft.
5 . The electrode device of claim 4 ,
wherein the rod pinion has a greater pitch circle diameter than the wire pinion.
6 . The electrode device of claim 1 ,
wherein the wire is protruded from one end of the shaft with a smaller displacement than the joint units and provides a force of pulling the joint units in a direction to be wound around the tube.
7 . The electrode device of claim 1 ,
wherein each joint unit includes:
a hinge unit formed on one or both sides of the joint unit in a longitudinal direction to be connected to an adjacent joint unit; and
a wire hole formed to allow insertion of the wire at a location spaced apart from a rotation center of the hinge unit.
8 . The electrode device of claim 1 ,
wherein each joint unit includes:
a hinge unit formed on one or both sides of the joint unit in a longitudinal direction to be connected to an adjacent joint unit; and
a winding support unit formed on one or both sides of the joint unit in the longitudinal direction to support the adjacent joint unit, and
since adjacent joint units are supported by means of the winding support unit, a force of supporting the joint units is provided to the joint units in an opposite direction to a direction to be wound around the tube.
9 . The electrode device of claim 1 ,
wherein the electrode guide further includes a tip joint connected to an end of the plurality of joint units connected sequentially to each other and coupled to ends of the electrode unit and the wire, respectively.
10 . The electrode device of claim 1 ,
wherein the plurality of joint units is made of an elastically deformable material and formed as one body, and
wherein a winding support groove of which at least a part of a space is deformed to be closed by a force of the wire is formed between adjacent joint units of the electrode guide.