Catheter operating structure

1. A catheter operating structure that is applied to a catheter for inserting a stent or another medical device into a human body in order to distend a blood vessel or a lumen of the human body which is undergoing stricture due to lesion, the catheter operating structure comprising:

a rotary member in which a spiral shaft formed on one side of a handle for rotation is inserted into one end of a tubular body;

a movable member which is formed in a tube shape and in which a female spiral end is formed at one end thereof and is spirally coupled with the spiral shaft; and

an injection member moving member which moves together when the movable member moves, or is unlocked to move alone in a lengthwise direction of the movable member, and in which an injection member, which passes through the movable member and the tubular body and injects an injector or discharges air, is coupled in the front thereof,

wherein, when the spiral shaft is rotated together by rotation of the handle in a state in which the spiral shaft is spirally coupled to the female spiral end, the movable member moves forward or backward in a lengthwise direction of the tubular body without being rotated due to the injection member moving member passing through the tubular body, and

wherein the tubular body includes body long slots formed on radial opposite sides thereof so that the injection member moving member moves slidably;

the movable member includes movable long slots that are formed on radial opposite sides thereof and are matched with the body lone slots; and

the injection member moving member includes a pair of pressable buttons that are formed on radial opposite sides thereof and move slidably in a state in which the pressable buttons are exposed through the body long slots and the movable long slots.

2. The catheter operating structure according to claim 1 , wherein:

the tubular body includes a body slide hole formed in the lengthwise direction thereof so that the movable member or the injection member moving member moves in a state in which an injection holder formed on the injection member is exposed; and

the movable member include a movable slide hole matched with the body slide hole so that the injection member moving member moves in the state in which the injection holder is exposed.

3. The catheter operating structure according to claim 1 , wherein:

the movable member includes a plurality of hooking ridges protruding inward from an inner circumferential surface thereof at regular intervals in a lengthwise direction thereof; and

when the pressable buttons are pressed after the injection member moving member is inserted into the movable member, hooking is released from the hooking ridges, whereas when the pressing of the pressable buttons is released, the hooking on the hooking ridges takes place.

4. The catheter operating structure according to claim 3 , wherein:

one end of the moving member body to which the pressable buttons of the injection member moving member are coupled is partly cut and bisected; and

the bisected end of the moving member body includes hooking pieces hooked on the hooking ridges of the movable member.

5. The catheter operating structure according to claim 4 , wherein:

the movable member includes hooking holes formed in a front portion thereof; and

in a state in which the injection member moving member is inserted into the movable member and the hooking pieces are inserted into the hooking holes, when the pressable buttons are pressed, the hooking pieces are released from the hooking holes, and then the injection member moving member slides in a forward or backward direction.

6. A catheter operating structure that is applied to a catheter for inserting a stent or another medical device into a human body in order to distend a blood vessel or a lumen of the human body which is undergoing stricture due to lesion, the catheter operating structure comprising:

a rotary member in which a spiral shaft coupled so as to be rotated by driving of a motor rotating in a forward or backward direction is inserted into one end of a tubular body from which a switch controlling an operation of the motor is exposed;

a movable member which is formed in a tube shape and in which a female spiral end is formed at one end thereof and is spirally coupled with the spiral shaft; and

an injection member moving member which moves together when the movable member moves, or is unlocked to move alone in a lengthwise direction of the movable member, and in which an injection member, which passes through the movable member and the tubular body and injects an injector or discharges air, is coupled in the front thereof,

wherein, when the motor is rotated in the forward or backward direction by turning on the switch, the spiral shaft is rotated in a state in which the spiral shaft is spirally coupled to the female spiral end, and the movable member moves forward or backward in a lengthwise direction of the tubular body without being rotated due to the injection member moving member passing through the tubular body, and

wherein the tubular body includes body lone slots formed on radial opposite sides thereof so that the injection member moving member moves slidably;

the movable member includes movable long slots that are formed on radial opposite sides thereat and are matched with the body long slots; and

the injection member moving member includes a air of pressable buttons that are formed on radial opposite sides thereof and move slidably in a state in which the pressable buttons are exposed through the body lone slots and the movable long slots.

7. The catheter operating structure according to claim 6 , wherein the switch is configured to pivot about the center thereof in such a way that, when opposite ends of the switch are pressed, the rotational directions of the motor are switched, and that when the pressing of the switch is released, the switch is restored to an original state.