KR102557714B1 - Endoscopic suturing apparatus - Google Patents

Abstract

The present invention relates to a main body coupled to an endoscope, a curved needle pivotally installed at the front end of the main body, a needle driver contacting the curved needle and turning the curved needle, and the curved needle turning It includes a rotational driving unit for rotating the needle driver and a rotational force generating unit for providing rotational force to the rotational driving unit; The rotary driving unit relates to an endoscope suturing device comprising at least two or more gears that rotate in engagement with each other according to the rotational force provided by the rotational force generator to rotate the needle driver. Through this, it is possible to continuously suture a wide incision range with a high suturing force using an endoscope.

Description

Endoscopy suture device {ENDOSCOPIC SUTURING APPARATUS}

The present invention relates to an endoscopic suturing device, and more particularly, to an endoscopic suturing device capable of suturing an incision site or a suturing procedure for a gastrointestinal reduction procedure using an endoscope.

NOTES is an abbreviation of Natural Orifice Transluminal Endoscopic Surgery (hereinafter referred to as 'Notes'), which is a type of endoscopic surgery that punctures the abdomen, inserts a laparoscope, makes 2-3 additional cuts, and operates through laparoscopic instruments. Dali refers to a method of performing surgery by accessing an endoscope into the abdominal cavity through a natural hole formed in the human body, such as the stomach, large intestine, or vagina in the case of women. In this sense, it is recognized as a scarless surgical method as it does not leave scars on the abdomen.

Such Notes not only have the advantage of painless abdominal surgery, but also can reduce surgical complications such as abdominal surgery pain, abdominal adhesions or hernias, and have the advantage of not being severely affected by cardiorespiratory function and immunology due to surgical stress. . In addition, since there is no abdominal incision clinically, the procedure can be performed only with sedatives and painkillers instead of general anesthesia, and since the surgical instruments are simpler and more movable compared to existing surgical instruments, only instrument disinfection is guaranteed even in the intensive care unit or field, not in the operating room. If possible, there is an advantage that surgery can be performed even in difficult environments.

Notes has not only the above advantages but also practical problems to be solved. For example, there are problems to be solved, such as which route to access the abdominal cavity through which procedure is ideal, how to secure a space suitable for the procedure in the abdominal cavity, and how to seal the access route with an instrument.

Among these problems, in the case of suturing, various types of suturing devices for suturing tissue such as the gastric wall cut for a passage after abdominal surgery by attaching or installing a sutureable suture structure to an endoscope have been proposed.

These sealing devices have recently been commercialized and have already been used in the field. For example, in the case of USGI Medical's 'G-Prox' product, continuous suturing is ensured by using a clip, but only the mucosal layer is sutured and the muscle layer is not sutured, so the stability of the suture is weak.

As another example, in the case of 'OverStitch' of Olympus, continuous suturing is possible, but the suturing is weak in that it does not guarantee simultaneous suturing of the muscle layer and the mucosal layer.

In particular, when using a medical clip, a large amount of clips are required to suture a wide range of tissue due to a narrow suturing range and low suturing reliability, and since continuous suturing is impossible, there is a problem in that the suturing operation time is prolonged. In addition, the medical clip used for suturing is left as a foreign substance in the body, which may cause a tumor.

Republic of Korea Patent Publication No.: 10-2009-0027188 (published date: March 16, 2009)

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide an endoscope suturing device capable of continuously suturing a wide incision range with high suturing force using an endoscope.

In addition, another object of the present invention is to provide a suture device for an endoscope capable of minimizing foreign substances remaining in the body by a suture method using a suture thread.

In addition, the present invention has another object to provide a suture device for an endoscope that can be applied to a suturing procedure for a gastrointestinal reduction procedure in addition to suturing an incision.

The above object is according to the present invention, a main body coupled to the endoscope, a curved needle rotatably installed at the front end of the main body, and a needle driver for turning the curved needle in contact with the curved needle, It includes a rotary driving unit for rotating the needle driver so that the curved needle turns, and a rotational force generating unit for providing rotational force to the rotation driving unit; The rotation driving unit is achieved by an endoscopic suturing device comprising at least two or more gears for rotating the needle driver by engaging with each other according to the rotational force provided by the rotational force generating unit.

Here, the gear is shaft-coupled with the needle driver, and a driver gear that rotates in synchronization with the needle driver so that the curved needle turns; a driving gear that rotates according to the rotational force provided from the rotational force generator; It may include a transmission gear that rotates in mesh with the driving gear and the driver gear, respectively, and transmits the rotation of the driving gear to the driver gear.

In addition, a gear ratio of the drive gear and the driver gear may be 1:N (N is a real number greater than 1).

And, the gear ratio of the drive gear and the transmission gear may be 1:M (M is 1 or a real number larger than 1).

Then, the rotational force generator forward and reverse rotates the driving gear so that the needle driver rotates forward and backward by a preset driving angle; The needle driver is in contact with the curved needle when rotating in the forward direction to rotate the curved needle, and when rotating in the reverse direction, contact is released from the curved needle to rotate independently.

In addition, the needle driver and a driver body which is axially coupled to the driver gear and rotates according to the rotation of the driver gear; It protrudes toward the curved needle in the opposite direction of the axis of rotation of the driver body and may include a needle contact portion that turns the curved needle by being in contact with the curved needle when rotating in a forward direction.

In addition, the curved needles may include a plurality of needle locking grooves formed in a spaced apart state along the turning direction of the curved needles and engaging the needle contact portion when the needle driver rotates in a forward direction.

In addition, a plurality of the needle engaging grooves may be formed on the curved needle at intervals corresponding to the driving angle.

And, at least one side of the needle contact portion and the needle locking groove includes an inclined portion formed along the turning direction of the curved needle; The needle contact portion may be guided by the inclined portion when the needle driver reversely rotates in a state caught in the needle catching groove, and may be separated from the needle catching groove.

And, the needle driver may further include a needle stopper that blocks rotation of the curved needle in the reverse rotation direction so that independent rotation of the needle driver is guaranteed when the needle driver rotates reversely after forward rotation.

And, the curved needle further comprises at least one stopper engaging groove caught on the needle stopper; The needle stopper may include a locking member that is caught in the stopper locking groove and a stopper support member installed on the main body to support the locking member so that the locking member is elastically inserted into the stopper locking groove.

In addition, the stopper support member has a shaft fixing portion fixed to the rotational shaft of the needle driver, and an elastic support plate extending outward in a radial direction from the shaft fixing portion and having an elastic support plate at an end of which the engaging member protrudes toward the stopper engaging groove. Type 1 support member; It may be provided in the form of any one of the second type support members having a pressure spring that elastically presses the locking member toward the stopper locking groove.

In addition, at least one of the stopper catching groove and the catching member may be provided in plural numbers, and may be provided at intervals corresponding to the driving angle.

In addition, the rotational force generating unit is connected to a driving wire wound around the driving gear, a first rotational force generating unit connected to one end of the driving wire and pulling the driving wire, and connected to the other end of the driving wire to drive the driving wire. It includes a second rotational force generator that pulls the wire; The first rotational force generator and the second rotational force generator may alternately pull the driving wire to rotate the driving gear forward and backward.

And, the first rotational force generator includes a handle for pulling the driving wire according to the user's manipulation; The second rotational force generator includes an elastic module installed on the main body to provide elastic force in a direction in which the driving wire is pulled; According to the manipulation of the handle, the elastic force of the elastic module is overcome and the driving wire is pulled toward the handle, and when the manipulation of the handle is released, the elastic force of the elastic module pulls the driving wire toward the elastic module. can

Here, the elastic module includes a module housing provided at the rear end of the main body and having an accommodation space formed therein, a compression member movably accommodated in the module housing and connected to the other end of the driving wire; A wire spring that elastically presses the compression member in a direction in which the driving wire is pulled may be included.

According to the configuration described above, according to the present invention, there is provided an endoscope suturing device capable of continuously suturing a wide incision range with high suturing force using an endoscope.

In addition, according to the present invention, the effect of reducing the suturing operation time is provided.

In addition, an effect of preventing side effects caused by foreign substances by minimizing foreign substances left in the body by a suture method using a suture is provided.

In addition, high-reliability suturing is possible using an endoscope regardless of the range of the suturing area, which can be used not only for simple suturing but also for various medical surgeries such as gastric reduction or knots using a natural opening. Provided.

1 is a perspective view in which an endoscope is coupled to an endoscopic suture device according to an embodiment of the present invention;
2 is a partially exploded perspective view of an endoscopic suture device according to an embodiment of the present invention;
3 is a perspective view of a curved needle of an endoscopic suture device according to an embodiment of the present invention;
4 is a view for explaining a structure in which a needle driver turns a curved needle according to an embodiment of the present invention;
5 and 6 are views for explaining an example of a rotational force generating unit of an endoscopic suture device according to an embodiment of the present invention;
7 is a view showing examples of a needle stopper according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view in which an endoscope 800 is coupled to an endoscopic suture device 10 according to an embodiment of the present invention, and FIG. 2 is a partial disassembly of the endoscopic suture device 10 according to an embodiment of the present invention. It is a perspective view.

1 and 2, the endoscopic suture device 10 according to an embodiment of the present invention includes a main body 100, a curved needle 200, a needle driver 300, and a rotary driving unit 400. ) and a rotational force generating unit 600.

The main body 100 has a curved needle 200, a needle driver 300 and a rotary driving unit 400 are installed, a detailed description thereof will be described later.

The main body 100 according to an embodiment of the present invention may include a coupling part 110 for coupling to the endoscope 800 . Referring to FIG. 1 , the endoscope 800 is coupled to the coupling part 110 of the main body 100 so that the main body 100 can move together with the endoscope 800 . In the present invention, an example is that the coupling portion 110 is provided in the form of a plurality of symmetrical semicircular projections corresponding to the outer diameter of the endoscope 800, and through this, the endoscope 800 is inserted into the coupling portion 110 and the endoscope 800 ) and the endoscopic suture device 10 may be combined.

Through the configuration as described above, the operator can perform a suture operation using the endoscopic suture device 10 according to an embodiment of the present invention while viewing an image acquired through the endoscope 800 .

The curved needle 200 according to an embodiment of the present invention may be pivotally installed at the front end of the main body 100 . Here, the curved needle 200 is turned at the front end of the main body 100 by the needle driver 300, and is drawn out of the main body 100 in the course of turning, and into the inside of the main body 100. The retraction process is repeated to perform suturing.

3 is a perspective view of the curved needle 200 of the endoscopic suture device 10 according to an embodiment of the present invention. Referring to FIG. 3, one side of the curved needle 200 has a pointed shape for penetrating the muscle layer and mucosal layer to be sutured, and the other side has a suture fastening hole for fastening the suture 700 (not shown). 230) can be formed.

Through this, in the course of the curved needle 200 turning, one side of the curved needle 200 penetrates the muscle layer or the mucosal layer and turns in the form of coming out again, while the suture 700 fastened to the other side breaks through the muscle layer or the mucosal layer. will be sutured

The needle driver 300 according to an embodiment of the present invention is in contact with the curved needle 200 to rotate the curved needle 200 . Then, the rotary drive unit 400 rotates the needle driver 300 so that the curved needle 200 turns.

4 is a view for explaining a structure in which the needle driver 300 turns the curved needle 200 according to an embodiment of the present invention.

Referring to FIGS. 2 and 4 , the rotary driving unit 400 according to an embodiment of the present invention may include at least two or more gears 410 , 420 , and 430 rotating in engagement with each other according to the rotational force provided by the rotational force generating unit 600 . can The rotational force provided from the rotational force generating unit 600 can be transmitted to the needle driver 300 through the engagement rotation of the gears 410 420 430 .

In an embodiment of the present invention, the rotary drive unit 400 includes a drive gear 410, a drive gear 430, and a transmission gear 420 as an example.

The driver gear 410 is axially coupled to the needle driver 300 and rotates in synchronization with the needle driver 300 so that the curved needle 200 turns. And, the driving gear 430 rotates according to the rotational force provided from the rotational force generating unit 600 .

Here, the transmission gear 420 rotates in mesh with the driving gear 430 and the driver gear 410, respectively, and transmits the rotation of the driving gear 430 to the driver gear 410.

According to the configuration as described above, when the driving gear 430 is rotated by the rotational force provided from the rotational force generating unit 600, the transmission gear 420 meshed with the driving gear 430 is rotated, and similarly, the transmission gear The driver gear 410 meshed with 420 rotates, and the needle driver 300 rotates in synchronization with the rotation of the driver gear 410, thereby causing the curved needle 200 to rotate.

In the embodiment of the present invention, the gear ratio of the driving gear 430 and the driver gear 410 is 1:N as an example, where N is a real number greater than 1. In addition, in the embodiment of the present invention, the gear ratio of the driving gear 430 and the transmission gear 420 is 1:M as an example, where M is 1 or greater than 1.

Through this, even a small rotation of the driving gear 430, the driver gear 410 is capable of large rotation, it is possible to rotate the curved needle 200 even with a fine manipulation of the rotational force generator 600 to be described later.

On the other hand, in the embodiment of the present invention, as shown in Figure 4, the front end of the main body 100, it is an example that the needle guide portion 130 for guiding the turning motion of the curved needle 200 is formed. And, at both ends of the needle guide portion 130, as shown in Figs. 2 and 4, a needle entrance 120 into which the curved needle 200 is withdrawn and drawn may be formed.

On the other hand, the needle driver 300 according to an embodiment of the present invention, as shown in Figure 4, as an example including a driver body 310 and the needle contact portion 320.

The needle driver 300 is axially coupled to the driver gear 410 and rotates along with the rotation of the driver gear 410 . Then, the needle contact portion 320 protrudes toward the curved needle 200 in a direction opposite to the rotation axis of the driver body 310, and the curved needle 200 is in contact with the curved needle 200. turn

In an embodiment of the present invention, it is exemplified that the rotational force generating unit 600 rotates the driving gear 430 forward and backward so that the needle driver 300 rotates forward and backward by a preset driving angle. In addition, the needle contact portion 320 of the needle driver 300 rotates in the forward direction, that is, when the curved needle 200 is rotated in the direction of withdrawing the needle entrance 120 to one side of the needle entrance 120 to the curved needle 200. In contact, the curved needle 200 turns. Also, the needle contact portion 320 of the needle driver 300 is released from contact with the curved needle 200 during reverse rotation and rotates independently.

More specifically, the needle driver 300 rotates in the forward direction by a driving angle, for example, by 180°, and then rotates in a reverse direction to return to its original position. At this time, the curved needle 200 is rotated by the driving angle according to the rotation of the needle driver 300 in the forward direction, and the contact with the needle driver 300 is released when the needle driver 300 rotates in the reverse direction. It maintains a state rotated by the driving angle, that is, a state rotated by 180°.

Then, when the needle driver 300, which has returned to its original position by rotating in the reverse direction, rotates again in the forward direction, the needle contact portion 320 of the needle driver 300 contacts the curved needle 200 together with the curved needle 200. It rotates at a driving angle of 180 °, and when rotating in the reverse direction, only the needle driver 300 rotates independently.

In this way, in accordance with the normal and reverse rotation of the rotary driving unit 400, the needle driver 300 repeats turning the curved needle 200 by a drive angle, for example, 180 °, so that the curved needle 200 is moved to the incision site. The back can be sutured.

Here, the curved needle 200 according to an embodiment of the present invention, as shown in Figures 3 and 4, a plurality of needle engaging grooves formed in a spaced apart state along the turning direction of the curved needle 200 (210). Here, when the needle driver 300 rotates in the forward direction, the needle contact portion 320 is caught in each needle locking groove 210 so that the curved needle 200 can rotate together with the needle driver 300 .

In the embodiment of the present invention, it is exemplified that the plurality of needle locking grooves 210 are formed on the curved needle 200 at intervals corresponding to the driving angle of the needle driver 300 . For example, in the example described above, when the drive angle is 180 °, the needle locking groove 210 may be formed in a state spaced apart from the needle driver 300 at approximately 180 ° intervals.

Therefore, when the needle contact portion 320 of the needle driver 300 is rotated in the forward direction by the driving angle in a state where one needle catching groove 210 is caught, the other needle catching groove 210 located forward in the rotational direction It is located at the original position of the needle driver 300, that is, the position where it is rotated in the reverse direction and moved to the original position, so that the other needle locking groove 210 is caught by the needle contact portion 320 of the needle driver 300.

In the embodiment of the present invention, the needle contact portion 320 includes a first inclined portion 321, and the needle locking groove 210 includes a second inclined portion 211 opposite to the first inclined portion 321. exemplify that

Referring to FIG. 4 in more detail, the first inclined portion 321 is formed on the surface of the needle contact portion 320 facing the curved needle 200, in the turning direction of the curved needle 200, that is, It is formed along the direction of rotation in the forward direction. Also, the needle locking groove 210 has an inclined shape opposite to the first inclined portion 321 .

Through this, when the needle driver 300 rotates in the reverse direction in a state where the needle contact portion 320 is caught in the needle locking groove 210, the first inclined portion 321 of the needle contact portion 320 is the needle locking groove ( 210) is retreated while being guided by the second inclined portion 211, so that the needle contact portion 320 can be more smoothly separated from the needle locking groove 210.

Here, the needle contact portion 320 may be made of a material having elasticity so that the needle contact portion 320 can be smoothly caught in the needle locking groove 210 and released.

In the embodiment of the present invention, but to include the first inclined portion 321 and the second inclined portion 211 in the needle contact portion 320 and the needle locking groove 210, respectively, as an example, the needle contact portion 320 and the needle Even if the inclined portion is formed on only one side of the locking groove 210, the needle contact portion 320 can be more smoothly separated from the needle locking groove 210.

Meanwhile, the endoscopic suture device 10 according to an embodiment of the present invention may further include a needle stopper 500 as shown in FIG. 4 .

The needle stopper 500 according to an embodiment of the present invention is in the reverse rotation direction of the curved needle 200 so that independent rotation of the needle driver 300 is ensured when the needle driver 300 rotates reversely after forward rotation. will block rotation. And, as shown in FIG. 3, the curved needle 200 may include at least one stopper catching groove 220 on which the needle stopper 500 is caught.

For example, the needle stopper 500 according to an embodiment of the present invention includes a holding member 520 and a stopper support member 510 .

The locking member 520 is caught in the stopper locking groove 220 and blocks the curved needle 200 from turning in the reverse direction together when the needle driver 300 rotates in the reverse direction, so that the independent reverse direction of the needle driver 300 rotation is guaranteed.

Here, in the stopper locking groove 220 and the locking member 520, like the first inclined portion 321 and the second inclined portion 211, the third inclined portion 222 and the fourth inclined portion facing each other ( 521) are formed, respectively, so that the engaging member 520 can be more stably guided and caught in the stopper engaging groove 220.

The stopper support member 510 is installed on the main body 100 to support the locking member 520 so that the locking member 520 can be elastically inserted into the stopper locking groove 220 and caught. In the embodiment of the present invention, as shown in FIG. 4 , it is exemplified that the stopper support member 510 is provided in the form of a first type support member.

For example, the first type support member according to the embodiment of the present invention includes a shaft fixing part 511 and an elastic support plate 512 . Here, as shown in FIG. 4 , on the inside of the main body 100 , it is exemplified that the plate seating groove 140 in which the elastic support plate 512 is seated is formed.

Shaft fixing part 511 may be fixed to the rotational shaft of the needle driver 300 . In addition, the elastic support plate 512 extends outward in the radial direction from the shaft fixing part 511, and an end engaging member 520 may protrude toward the stopper engaging groove 220.

In the present invention, as an example, a pair of elastic support plates 512 extend to both sides in the radial direction of the elastic support plate 512, and an example in which the engaging member 520 is formed at the end of each elastic support plate 512.

In the embodiment of the present invention, it is taken as an example that at least one of the stopper locking groove 220 and the locking member 520 is provided in plurality. In the embodiment shown in FIGS. 3 and 4, the hooking member 520 of the needle stopper 500 is provided as a pair, and the stopper hooking groove 220 of the curved needle 200 is formed as an example. there is.

As the above-described needle locking grooves 210 are formed at intervals corresponding to the driving angle, one of the plurality of stopper locking grooves 220 and the locking member 520 may be formed at intervals corresponding to the driving angle there is.

In the present invention, as an example, the locking members 520 are provided as a pair, and the locking members 520 are provided at driving angle intervals, for example, 180° intervals along the turning direction of the curved needles 200. example

Meanwhile, as described above, the rotational force generating unit 600 according to an embodiment of the present invention may provide rotational force to the driving gear 430 of the rotational driving unit 400 . Here, the turning force generator 600 rotates the drive gear 430 of the rotation driving unit 400 in the normal and reverse direction as described above.

5 and 6 are views for explaining an example of the rotational force generator 600 of the endoscopic suture device 10 according to an embodiment of the present invention.

5 and 6, the rotational force generator 600 according to an embodiment of the present invention includes a driving wire 630, a first rotational force generator 610 and a second rotational force generator 620. can do.

The driving wire 630 is wound around the driving gear 430 to rotate the driving gear 430 according to the operation of the first rotational force generator 610 and the second rotational force generator 620 . Here, the driving wire 630 is wound around the driving gear 430 and has two ends. That is, both ends of the drive wire 630 are separated.

5 and 6, the driving wire 630 is wound around the driving gear 430, and the intersection between the wire support 160 formed on the main body 100 and the driving gear 430 crosses. configured to form. That is, in a state in which the driving wire 630 is wound around the driving gear 430 and then twisted once, one end is connected to the first rotational force generating unit 610 and the other end is connected to the second rotational force generating unit. (620). At this time, the driving wire 630 comes into contact with the wire support 160 at a position close to the intersection and is supported by the wire support 160 .

The first rotational force generating unit 610 is connected to one end of the driving wire 630 and pulls the driving wire 630, and the second rotational force generating unit 620 is connected to the other end of the driving wire 630 to pull the driving wire 630. Pull 630.

Through this configuration, when the first rotational force generating unit 610 pulls the driving wire 630, the driving gear 430 rotates in the forward direction. Conversely, when the second rotational force generator 620 pulls the driving wire 630, the driving gear 430 rotates in the reverse direction. That is, the first rotational force generating unit 610 and the second rotational force generating unit 620 alternately pull the driving wire 630 so that the driving gear 430 can rotate forward and backward.

For example, the first rotational force generator 610 according to an embodiment of the present invention includes a handle that pulls the driving wire 630 according to a user's manipulation. In addition, the second rotational force generator 620 includes elastic modules 621 , 622 , and 623 installed on the main body 100 to provide elastic force in a direction in which the driving wire 630 is pulled.

According to the configuration described above, when an operator pulls the driving wire 630 by manipulating the handle, the elastic force of the elastic modules 621 , 622 , and 623 is overcome and the driving wire 630 can be pulled toward the handle. In addition, when the operator releases the operation of the handle, the driving wire 630 is pulled in the direction of the elastic modules 621 , 622 , and 623 by the elastic force of the elastic modules 621 , 622 , and 623 , so that the driving gear 430 can rotate in the normal and reverse direction. .

The handle 720 may be provided in various shapes, for example, as shown in FIGS. 5 and 6 , it may be manufactured in the same shape as a gun. That is, when the trigger part of the gun is pressed, the driving wire 630 is pulled, and when the trigger part of the gun is released, the driving wire 630 is moved to its original position by the elasticity of the elastic modules 621 , 622 , and 623 .

Here, the shape of the handle is not limited to the gun and may vary. In addition, in FIGS. 5 and 6, the operator is provided to manually operate the handle, but a control unit (not shown) may be installed to automatically control the pulling and releasing of the driving wire 630.

The elastic modules 621 , 622 , and 623 according to an embodiment of the present invention may include a module housing 623 , a compression member 621 and a wire spring 622 .

The module housing 623 is provided on the rear end side of the main body 100, and an accommodation space is formed therein. Here, the module housing 623 may be provided in a form in which the inner space of the main body 100 itself forms an accommodation space, and a separate module housing 623 is inserted into the accommodation space of the main body 100. It may be provided in a form. In FIG. 5 , the module receiving space 150 of the main body 100 forms the module housing 623 as an example.

The wire spring 622 includes various types, and may be provided as, for example, a coil spring. When the wire spring 622 is a coil spring, the driving wire 630 may pass through the inside of the wire spring 622 . That is, the driving wire 630 may be coupled to the compression member 621 through the inside of the wire spring 622 .

The compression member 621 is coupled to an end of the wire spring 622 and connected to the driving wire 630, and is provided so that the wire spring 622 is compressed when the driving wire 630 is pulled in the direction of the second rotation axis.

More specifically, as shown in FIG. 5, when the driving wire 630 is pulled through the handle, as shown in FIG. 6, the compression member 621 presses the wire spring 622 and elastically contracts it. do.

And, when the pulling force of the driving wire 630 is removed and the pulling of the driving wire 630 is released, the wire spring 622 elastically expands as shown in FIG. 5 by the elastic restoring force of the wire spring 622. do.

Through this, through collaboration between the handle and the elastic modules 621 , 622 , and 623 , the drive gear 430 is rotatable in the forward and reverse directions. And, through this normal and reverse rotation, as shown in FIG. 5, the curved needle 200 inside the needle guide part 130 comes out of the main body 100 through the needle entrance 120 on one side. While turning, as shown in FIG. 6, the sutured area is sealed while being drawn into the main body 100 again through the needle entrance 120 on the other side.

And, through one more normal and reverse rotation of the needle driver 300, turning from the state shown in FIG. 6 to the state shown in FIG. 5, and repeating the states shown in FIGS. 5 and 6, the suture site is sutured. will do

7 is a view showing examples of a needle stopper 500 according to an embodiment of the present invention. The example shown in (a) of FIG. 7 represents the example shown in FIG. 4 .

(b) of FIG. 7 illustrates an example in which the stopper support member 510 has a shape of a second type support member. For example, the second type support member includes a pressure spring that elastically presses the locking member 520 toward the stopper locking groove 220 .

The pressure spring is provided in the form of a coil spring, and as shown in (b) of FIG. 7 , it is installed inside the main body 100 to press the engaging member 520 toward the curved needle 200 .

In the embodiment shown in (c) of FIG. 7, it is exemplified that the engaging member 520 and the stopper support member 510 are integrally formed. The single member formed integrally may be made of a material having bar-shaped elasticity, and its longitudinal direction is disposed in the tangential direction of the curved needle 200 to block the reverse rotation of the curved needle 200. .

Although several embodiments of the present invention have been shown and described, those skilled in the art will recognize that modifications may be made to the embodiments without departing from the spirit or spirit of the present invention. . The scope of the invention will be defined by the appended claims and their equivalents.

10: endoscopic suture device 100: main body
110: coupling part 120: needle entrance
130: needle guide part 140: plate seating groove
150: module accommodation space 160: wire support
200: curved wire 210: needle locking groove
211: second inclined portion 220: stopper locking groove
222: third inclined portion 230: suture fastening hole
300: needle driver 310: driver body
320: needle contact portion 321: first inclined portion
400: rotation drive unit 410: driver gear
420: transmission gear 430: drive gear
500: needle stopper 510: stopper support member
511: shaft fixing part 512: elastic support plate
520: engaging member 600: rotational force generating unit
610: first rotational force generating unit 620: second rotational force generating unit
621: compression member 622: wire spring
630: drive wire 700: suture
800: Endoscope

Claims (16)

A main body coupled to the endoscope;
A curved needle rotatably installed at the front end of the main body;
A needle driver for turning the curved needle in contact with the curved needle;
A rotation driving unit for rotating the needle driver so that the curved needle turns;
Includes a rotational force generating unit for providing rotational force to the rotational driving unit;
The rotary driving unit includes at least two gears that rotate in engagement with each other according to the rotational force provided by the rotational force generating unit to rotate the needle driver,
the gear
a driver gear that is axially coupled with the needle driver and rotates in synchronization with the needle driver so that the curved needle turns;
a driving gear that rotates according to the rotational force provided from the rotational force generator;
Endoscopic suturing device comprising a transmission gear that engages with and rotates the driving gear and the driver gear, respectively, and transmits the rotation of the driving gear to the driver gear. delete According to claim 1,
Endoscopic suturing device, characterized in that the gear ratio of the drive gear and the driver gear is 1: N (N is a real number greater than 1). According to claim 1,
Endoscopic suturing device, characterized in that the gear ratio of the drive gear and the transmission gear is 1:M (M is 1 or a real number larger than 1). According to claim 1,
The rotational force generator forward and reverse rotates the driving gear so that the needle driver rotates forward and backward by a predetermined drive angle;
The needle driver is in contact with the curved needle when rotating in a forward direction to rotate the curved needle, and when rotating in a reverse direction, the needle driver is released from contact with the curved needle and rotates independently. According to claim 5,
The needle driver
a driver body that is axially coupled to the driver gear and rotates according to rotation of the driver gear;
Endoscopic suture device comprising a needle contact portion protruding toward the curved needle in a direction opposite to the axis of rotation of the driver body and contacting the curved needle to turn the curved needle when rotating in a forward direction. According to claim 5,
The curved needles are formed in a spaced apart state along the turning direction of the curved needles, and include a plurality of needle catching grooves in which the needle contact part is caught when the needle driver rotates in a forward direction Endoscopic suture characterized in that Device. According to claim 5,
Endoscope suture device, characterized in that the plurality of needle locking grooves are formed in the curved needle at intervals corresponding to the drive angle. According to claim 7,
At least one side of the needle contact portion and the needle locking groove includes an inclined portion formed along a turning direction of the curved needle;
The needle contact portion is guided by the inclined portion when the needle driver reversely rotates in a state caught in the needle locking groove and is separated from the needle locking groove. According to claim 7,
Endoscopic suture device further comprising a needle stopper for blocking rotation of the curved needle in the reverse rotation direction so that independent rotation of the needle driver is ensured when the needle driver rotates reversely after forward rotation. According to claim 10,
The curved needle further includes at least one stopper catching groove caught on the needle stopper;
The needle stopper
A locking member caught in the stopper locking groove;
and a stopper support member installed on the main body to support the locking member so that the locking member is elastically inserted into the stopper locking groove. According to claim 11,
The stopper support member is
A first type support member having a shaft fixing part fixed to the rotating shaft of the needle driver, and an elastic support plate extending outward in a radial direction from the shaft fixing part and having an elastic support plate at an end of which the engaging member protrudes toward the stopper engaging groove;
An endoscope suture device, characterized in that provided in the form of any one of the second type support member having a pressure spring for elastically pressing the locking member toward the stopper locking groove. According to claim 12,
At least one of the stopper locking groove and the locking member is provided in plural numbers and is provided at intervals corresponding to the driving angle. According to claim 5,
The rotational force generator
a drive wire wound around the drive gear;
A first rotational force generator connected to one end of the driving wire and pulling the driving wire;
It is connected to the other end of the driving wire and includes a second rotational force generating unit pulling the driving wire;
Endoscopic suturing device, characterized in that the first rotational force generating unit and the second rotational force generating unit alternately pulls the driving wire to rotate the driving gear forward and backward. According to claim 14,
The first rotational force generator includes a handle for pulling the driving wire according to a user's manipulation;
The second rotational force generator includes an elastic module installed on the main body to provide elastic force in a direction in which the driving wire is pulled;
According to the manipulation of the handle, the elastic force of the elastic module is overcome and the driving wire is pulled toward the handle, and when the manipulation of the handle is released, the elastic force of the elastic module pulls the driving wire toward the elastic module. Endoscopic suture device, characterized in that the lose. According to claim 15,
The elastic module
A module housing provided at the rear end of the main body and having an accommodation space therein;
A compression member movably accommodated in the module housing and connected to the other end of the driving wire;
Endoscopic suture device comprising a wire spring that elastically presses the compression member in a direction in which the driving wire is pulled.