Stitching instrument for endoscope

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a stitching instrument for an endoscope. Comprising a fixed handle, a fixed bolt, a needle mounting button, a rotating assembly, a flushing assembly, a sleeve, a protective cap, a bending device, a movable handle, a suture steel wire, a pressing plate steel wire, a forceps head short pipe and a suture needle holding assembly. A movable handle mounting hole is formed in the upper end of the movable handle, the movable handle mounting hole and a movable handle mounting column of the fixed handle are correspondingly mounted, the near end of the sleeve penetrates through a sleeve hole in the far end of the fixed handle and is matched with a groove in the far end of the rotary connecting rod, and the far end of the sleeve is connected with the bending joint assembly; the near end of the forceps head short tube is connected with the bending joint assembly, and the far end of the forceps head short tube is connected with the suture needle holding assembly; the near end of the suture steel wire is in fastening connection with the near end of the movable handle through a steel wire lock catch, and the far end of the suture steel wire is connected with a rack seat in the suture needle holding assembly and used for driving the suture needle holding assembly to perform continuous suture; and the flushing connector is embedded into the upper rotary shifting wheel and is connected with the flushing hole at the near end of the sleeve.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical devices, especially relates to a suture device for endoscope for carrying out tissue suture in surgical operation. BACKGROUND

[0002] Endoscopic surgery is a minimally invasive surgical operation using modern camera technology and endoscopic surgical instruments to complete complex intra-thoracic / abdominal surgery through a thoracic / abdominal wall cannula or a small incision. Only 1-3 1.5cm small holes in the thoracic / abdominal wall are needed to complete endoscopic surgery. During the operation, the surgeon inserts the endoscopic surgical instrument into the cannula through the puncture device and cooperates with surgical equipment such as a vascular clamp to perform resection and anastomosis operations on the lesion.

[0003] During the endoscopic surgery, the surgeon often needs to hold a suture needle with a needle holder to supplement or reinforce the suture of the tissue to ensure the operation effect. However, the endoscopic surgery position is narrow, and the manual suture operation is difficult, time-consuming and laborious. Therefore, the suture can be performed through a suture device. However, the existing suture device usually drives the gear and rack to reciprocate to control the action of the suture needle through handle pressing. Since it is a hard operation, the surgeon's hand will ache after long time pressing, and a large amount of bleeding will occur when the suture needle penetrates the tissue. SUMMARY

[0004] The utility model aims at the above-mentioned insufficient, provides a kind of suture device for endoscope, it is a kind of endoscopic surgery suture device that is labor-saving, reduces the amount of bleeding of human body.

[0005] The proximal end of the utility model refers to the end close to the operator, and the distal end refers to the end away from the operator.

[0006] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0007] A suture device for endoscope includes a fixed handle, a fixing bolt, a needle loading button, a rotating assembly, a flushing assembly, a cannula, a protective cap, a bending device, a movable handle, a suture wire, a pressing plate wire, a jaw short pipe, a bending joint assembly and a suture needle holding assembly.

[0008] The movable handle is provided with a movable handle mounting hole at the upper end, which is installed in correspondence with the movable handle mounting column of the fixed handle. The movable handle can move within a certain range with the movable handle mounting column as the shaft. The proximal end of the cannula passes through the cannula hole of the distal end of the fixed handle and fits into the groove at the distal end of the rotating connecting rod. The distal end is connected with the bending joint assembly. The proximal end of the jaw short pipe is connected with the bending joint assembly, and the distal end of the cannula is connected with the suture needle holding assembly.

[0009] The proximal end of the suture wire passes through the suture wire pulley fixed by the pulley fixing pin, passes through the fixed handle, is fastened and connected with the proximal end of the movable handle through the wire lock, the distal end of the suture wire passes through the sleeve and passes between the two pulleys in the bending joint assembly, is connected with the rack seat in the suture needle holding assembly, and is used for driving the suture needle holding assembly to continuously suture.

[0010] The irrigation connecting port is embedded in the upper rotating knob and is connected with the irrigation hole at the proximal end of the sleeve. The protective cap is sleeved on the suture needle holding assembly at the proximal end and is sealed at the distal end.

[0011] The proximal end of the pressing plate wire passes through the pressing plate wire pulley fixed by the pulley fixing pin and is fixed in the needle loading button and the wire clamp, the distal end passes through the pressing plate wire tube, the rack seat, the pressing plate guide pin and the pressing plate spring, and is fixedly connected with the needle loading pressing plate. When the needle loading button is pushed, the pressing plate wire pulls the needle loading pressing plate connected at the distal end to move towards the proximal end, exposes the suture needle mounting groove at the distal end of the upper jaw, and compresses the pressing plate spring at the same time. After the suture needle is loaded, the needle loading button is released, the pressing plate spring is stretched, the needle loading pressing plate is pushed to reset, and the suture needle is fixed.

[0012] The rotating assembly comprises a rotating knob, rotating connecting rod positioning beads, a rotating connecting rod and four fixing pins. The rotating connecting rod has a plurality of protrusions at the distal end, which are matched with a plurality of transverse grooves at the proximal end of the sleeve to be fixed, and has a circular transverse recess at the proximal end, which is matched with the hemispherical protrusions at the front ends of the positioning beads on both sides. The positioning beads are fixed in the reserved holes of the fixed handle. The rotating knob is divided into an upper rotating knob and a lower rotating knob, and the two are fixed to each other by the four fixing pins. The vertical reinforcing ribs inside the rotating knob are matched with the vertical grooves at the proximal end of the sleeve during installation, and are then fixed by the four fixing pins. Rotating the rotating knob will drive the sleeve to rotate, and the positioning beads will replace the groove positions matched with the rotating connecting rod in sequence, so as to fix the rotating angle.

[0013] The bending device is composed of a bending dial, a set of bending disc positioning beads, a bending shaft, a bending connecting pin, a bending disc, a disc insert block, a bending connecting rod, a joint connecting rod and a bending joint assembly. The bending dial is composed of an upper bending dial and a lower bending dial. The two dials are fixed by the cooperation of the stand of the upper bending dial and the groove of the lower bending dial and are matched with the lower end of the bending shaft, so as to drive the rotation of the bending shaft. The bending disc is matched with the upper end of the bending shaft and rotates with the bending shaft. The bending disc has a vertical annular groove on the outer periphery, which is matched with the bending disc positioning beads on both sides. The bending disc positioning beads are installed and fixed in the reserved holes of the fixed handle. The lower part of the bending connecting pin is matched with the notch of the bending disc, and the upper part is matched with the proximal opening of the bending connecting rod. The disc insert block is installed in the notch of the bending disc and is welded and fixed. The circular arc surface and the inner ring of the bending disc together form a closed ring, which restricts the bending connecting pin from sliding and falling off.

[0014] The bending dial is fixed in the distal notch of the fixed handle by the bending shaft and the bending disc. The lower end of the bending connecting pin is matched with the notch of the bending disc, and the bending connecting pin is fixed in the bending disc by the disc insert block. The upper end of the bending connecting pin is connected with the joint connecting rod, and the joint connecting rod is connected with the bending joint assembly through the bending connecting rod. By rotating the bending dial, the bending shaft, the bending disc, the bending connecting pin and the joint connecting rod are driven, so that the bending connecting rod drives the bending joint assembly to move, thereby realizing the bending of the suture needle holding assembly.

[0015] The proximal end of the joint connecting rod is sleeved on the stepped structure of the distal end of the bending connecting rod. When the suture is installed, the joint connecting rod is connected with the bending connecting rod, and a limiting ring is extruded on the joint connecting rod at a position corresponding to the groove of the bending connecting rod, so as to ensure that the joint connecting rod is connected with the bending connecting rod with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod passes through the reserved hole of the joint container and is matched and installed with the pin on the left joint head.

[0016] The bending joint assembly is composed of a left joint head, a right joint head, a pulley, a joint head right pin, a joint head left pin and a joint container. Two pulleys are installed on the pulley pin of the right joint head, and then the left joint head and the right joint head are combined and installed in the joint container and are matched and installed by the joint head right pin and the joint head left pin. The proximal end of the joint container is welded and fixed with the distal end of the sleeve. The combined joint head can rotate around the axes of the joint head right pin and the joint head left pin.

[0017] The flushing assembly comprises a flushing connecting port, a flushing port protective cover, a flushing liquid conduit, and an anti-backflow sealing plug. The flushing liquid conduit is installed with its distal end entering the sleeve flushing port and extending towards the distal end of the sleeve. The proximal end port of the flushing liquid conduit is provided with a fixing ring which is in close contact with the outer edge of the sleeve flushing port and is pressed and fixed by the upper rotary knob. The anti-backflow sealing plug is made of soft silica gel and is provided with small holes for the flushing liquid conduit, the pressing plate steel wire tube, the suture steel wire, and the joint connecting rod to pass through. The anti-backflow sealing plug is installed at the distal end of the sleeve and is tightly fixed to isolate the distal end and the proximal end of the sleeve. The flushing connecting port is installed in the flushing hole at the distal end of the upper rotary knob and the sleeve flushing hole. The proximal end of the sleeve and the rotary connecting rod are fixedly connected through the clamping groove. The upper end of the flushing connecting port is used for connecting with the external flushing liquid tube. The flushing connecting port and the flushing liquid conduit form a water channel passage to clean the wound during the operation.

[0018] The protective cap is made of silica gel or rubber, is closed at the distal end, and has four reinforcing ribs inside to prevent it from falling off easily. The protective cap is used to protect the suture needle holding assembly during transportation and storage. The protective cap can be removed during the operation.

[0019] When the suture is installed, the joint connecting rod is connected with the bending connecting rod. A limiting ring is extruded on the joint connecting rod at a position corresponding to the groove of the bending connecting rod to ensure that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. This avoids the interference of the bending connecting rod and the joint connecting rod with the movement of the rotating assembly, thereby providing a larger rotating space.

[0020] The rotary knob is engaged with the rotating track at the distal end of the fixed handle, is fixedly combined with the vertical slot of the rotating connecting rod and the sleeve, and can rotate around the axis of the sleeve. The upper and lower parts of the rotary knob are fixedly connected by the fixing pin. When the rotary knob rotates, the sleeve, the rotating connecting rod, and the bending joint assembly are driven to rotate along the axial direction through the vertical slot, thereby realizing the rotation of the suture needle holding assembly.

[0021] The suture needle holding assembly comprises a needle loading assembly, a rack assembly, a gear assembly, a rack reset spring and a suture needle, the jaw short tube is connected at the distal end of the bending joint assembly, the distal end of the suture wire is fixedly connected with the rack seat of the rack assembly, the rack assembly is elastically connected with the rack seat through the rack reset spring, and the gear in the gear assembly is engaged with the rack in the rack assembly. When the suture wire pulls the rack seat to move, the rack is driven to move towards the proximal end, the rack reset spring is compressed, the gear rotates clockwise along with the rack, the gear washer and the connecting plate positioning pin rotate clockwise along with the gear, the connecting plate is limited by the vertical column in the lower jaw, and the needle pushing spring tube and the needle retracting spring tube are arcally displaced along the arc-shaped groove at the distal end of the lower jaw. When the suture wire is loosened, the rack reset spring is stretched, the rack seat and the rack are driven to move towards the distal end, the gear rotates counterclockwise along with the rack, the gear washer and the connecting plate positioning pin rotate counterclockwise, the connecting plate drives the needle pushing spring tube and the needle retracting spring tube to retreat. The suture needle is driven to make a reciprocating circular motion for tissue suture in a surgical operation.

[0022] The proximal end of the rack assembly is provided with the jaw short tube for sleeving the rack reset spring, the rack reset spring will not be inclined due to compression, and meanwhile, when the suture needle is operated to the limit position, the rack seat abuts against the bending joint, the jaw short tube and the suture needle holding assembly are fixedly connected, and it is ensured that the suture needle can be normally reset.

[0023] The gear assembly comprises a gear, a gear washer, a connecting plate positioning pin and a connecting plate, the gear is matched with the gear washer, the gear washer is provided with an eccentric limiting long hole, the connecting plate positioning pin is matched and positioned with the eccentric long hole on the gear washer and the connecting hole at the proximal end of the connecting plate, the connecting plate is limited by the limiting long hole in the middle of the connecting plate, the connecting plate is used for connecting the gear and the suture needle, and the limiting long hole in the middle of the connecting plate can limit the connecting plate, so that the movement amplitude of the connecting plate is ensured.

[0024] After the above structure is adopted, the suture needle holding assembly has the following advantages.

[0025] The protection device ensures the integrity and precision of the instrument during use, the protection cap is tightly attached, the suture needle holding assembly is isolated from the outside world, safety and sanitary conditions are ensured, and the possibility of cross infection is reduced.

[0026] The flushing assembly can clean the wound after being connected with an external water pipe, the flushing liquid is sprayed from the bending joint assembly in a horn shape, the cleaning area is large, blood stasis is reduced, and rehabilitation is promoted.

[0027] The utility model discloses a bend joint assembly and bend assembly are matched to form the structure of the limiting ring, avoid the interference of bend connecting rod and joint connecting rod to the movement of rotating assembly, and have greater rotation space, and the operation is more smooth when using.

[0028] The bend joint assembly of the utility model is approximately spherical, the bending process is more smooth, the bending angle is larger, and interference does not occur between each other.

[0029] The utility model discloses more accurate rotation angle. The rotation connecting rod in rotating assembly and the bend wheel in bend assembly are provided with limiting grooves, and each limiting groove is matched with a set of positioning beads, so that the rotation angle can be accurately limited, and more difficult operation environments can be adapted.

[0030] The bend joint assembly of the utility model makes the bending axis and the rotation plane coincide, thereby shortening the distance from the bending axis to the distal end of the suture head, making the movement of the suture head more flexible, and more easily performing surgical operations to suture tissues in a narrow space. BRIEF DESCRIPTION OF DRAWINGS

[0031] The utility model will be further described below with reference to the drawings:

[0032] Figure 1 It is an external schematic view of a suture device for an endoscope.

[0033] Figure 2 It is a protective cap structure schematic view of a suture device for an endoscope.

[0034] Figure 3 It is an opened shell and removed protective cap schematic view of a suture device for an endoscope.

[0035] Figure 4 It is a rotating assembly and flushing assembly schematic view of a suture device for an endoscope.

[0036] Figure 5 It is a rotating assembly and flushing assembly split schematic view of a suture device for an endoscope.

[0037] Figure 6 It is a bend assembly and bend joint assembly schematic view of a suture device for an endoscope.

[0038] Figure 7 It is a bend assembly and bend joint assembly split schematic view of a suture device for an endoscope.

[0039] Figure 8 It is an internal connection state schematic view of a suture device for an endoscope.

[0040] Figure 9 It is a suture needle holding assembly split schematic view of a suture device for an endoscope.

[0041] Figure 10 It is a needle holding assembly of a suture needle of a suture device for endoscope.

[0042] Figure 11 It is a running schematic view of a suture needle holding assembly of a suture device for endoscope.

[0043] In the figure: 1, fixed handle, 2, fixed bolt, 3, needle loading button, 4, rotating dial, 5, irrigation assembly, 6, sleeve, 7, protective cap, 8, bending dial, 9, movable handle, 10, suture wire, 11, suture wire pulley, 12, pulley fixing pin, 13, wire lock, 14, wire chuck, 15, pressure plate wire pulley, 16, pressure plate wire, 17, rotating connecting rod positioning bead, 18, rotating connecting rod, 19, bending joint assembly, 20, pincer head short tube, 21, suture needle holding assembly, 22, fixing pin, 23, bending rotation shaft, 24, bending connecting pin, 25, bending dial, 26, bending connecting rod, 27, joint connecting rod, 28, rack return spring, 29, pressure plate wire tube, 30, bending dial positioning bead, 31, dial insert block;

[0044] 1-1, movable handle mounting column, 4-1, upper rotating dial, 4-2, lower rotating dial, 5-1, irrigation connecting port, 5-2, irrigation port protective cover, 5-3, irrigation liquid guide pipe, 5-4, anti-backflow sealing plug, 7-1, protective cap reinforcing rib, 8-1, upper bending dial, 8-2, lower bending dial, 9-1, movable handle mounting hole, 19-1, left joint head, 19-2, right joint head, 19-3, pulley, 19-4, joint head right pin, 19-5, joint head left pin, 19-6, joint container, 21-1, rack seat, 21-2, rack, 21-3, pressure plate guide pin, 21-4, pressure plate spring, 21-5, needle loading pressure plate, 21-6, needle loading pressure plate positioning screw, 21-7, upper pincer head, 21-8, retreat stop needle, 21-9, connecting piece, 21-10, needle pushing spring tube, 21-11, needle pushing, 21-12, needle pushing spring, 21-13, lower pincer head, 21-14, gear, 21-15, gear washer, 21-16, connecting piece positioning pin, 21-17, suture needle mounting groove. DETAILED DESCRIPTION

[0045] The utility model makes further detailed explanation in combination with the example given in the accompanying drawings.

[0046] The proximal end refers to the end close to the surgical operator, and the distal end refers to the end away from the surgical operator.

[0047] As Figures 1-3As shown in the figure, a kind of endoscope suture includes fixed handle 1, fixed bolt 2, needle loading button 3, rotating assembly, flushing assembly 5, sleeve 6, protective cap 7, bending device, movable handle 9, suture wire 10, pressing plate wire 16, rotating connecting rod 18, bending joint assembly 19, clamp short tube 20, suture needle holding assembly 21.The upper end of the movable handle 9 is provided with movable handle mounting hole 9-1, which is installed with the movable handle mounting column 1-1 of the fixed handle 1, and the movable handle 9 can be moved within a certain range with the movable handle mounting column 1-1 as the shaft, the proximal end of the sleeve 6 passes through the sleeve hole of the distal end of the fixed handle 1, is engaged with the recess of the distal end of the rotating connecting rod 18, and the distal end is connected with the bending joint assembly 19.The proximal end of the clamp short tube 20 is connected with the bending joint assembly 10, and the distal end is connected with the suture needle holding assembly 21.The proximal end of the suture wire 10 passes through the fixed handle 1 by passing through two suture wire pulleys 11 fixed by pulley fixing pin 12, is fastened and connected with the proximal end of the movable handle 9 by wire lock 13, passes through the sleeve 6, and passes through between two pulleys 19-3 in the bending joint assembly 19, is connected with the rack seat 21-1 in the suture needle holding assembly, and is used to drive the suture needle holding assembly to continuously suture.The flushing connecting port 5-1 is embedded in the upper rotating dial 4-1, and is connected with the flushing hole in the proximal end of the sleeve 6.The proximal end of the protective cap 7 is sleeved on the suture needle holding assembly 21, and the distal end is sealed.

[0048] As Figures 4-5 shown, the rotating assembly includes rotating dial 4, rotating connecting rod positioning bead 17, rotating connecting rod 18, four fixed pins 22 and sleeve 6.

[0049] The rotating function of the utility model is realized by rotating connecting rod positioning bead 17, rotating connecting rod 18, rotating dial 4, four fixed pins 22 and sleeve 6.The distal end of the rotating connecting rod 18 has several protrusions, which form cooperation with several transverse recesses in the proximal end of the sleeve 6, and then are fixed, and the proximal end has circular transverse recesses, which cooperate with the hemispherical protrusions in the front end of the rotating connecting rod positioning bead 17 on both sides.The rotating connecting rod positioning bead 17 is fixed in the reserved hole of the fixed handle 1.The rotating dial 4 is divided into upper rotating dial 4-1 and lower rotating dial 4-2, and the two are fixed with each other by four fixed pins 22, and the vertical protrusions in the rotating dial 4 are matched with the vertical recesses in the proximal end of the sleeve 6 during installation, and then are fixed by four fixed pins 22.Turning the rotating dial 4 will drive the sleeve 6, and then drive the rotating connecting rod 18 to rotate, and the rotating connecting rod positioning bead 17 will replace the groove position cooperating with the rotating connecting rod 18 in turn, to realize the fixation of rotating angle.

[0050] The flushing assembly 5 includes a flushing connection port 5-1, a flushing port protective cover 5-2, a flushing liquid guide pipe 5-3, and an anti-backflow sealing plug 5-4. The flushing liquid guide pipe 5-3 is installed with a distal end entering the flushing port of the sleeve 6 and extending towards the distal end of the sleeve 6. The proximal end port of the flushing liquid guide pipe 5-3 is provided with a fixing ring which is in close contact with the outer edge of the flushing port of the sleeve 6 and is pressed and fixed by the upper rotary knob 4-1. The anti-backflow sealing plug 5-4 is made of soft silica gel and is provided with small holes for the flushing liquid guide pipe 5-3, the pressing plate steel wire pipe 29, the suture steel wire 10, and the joint connecting rod 27 to pass through. The anti-backflow sealing plug 5-4 is installed at the distal end of the sleeve 6 and is tightly fixed to seal the distal end and the proximal end of the sleeve 6. The flushing connection port 5-1 is installed in the flushing hole at the distal end of the upper rotary knob 4-1 and the flushing hole of the sleeve 6. The proximal end of the sleeve 6 and the rotary connecting rod are fixedly connected through a clamping groove. The upper end of the flushing connection port 5-1 is used to connect with an external flushing liquid pipe. The flushing connection port 5-1 and the flushing liquid guide pipe 5-3 form a water passage. The connection part of the bending joint assembly 19 serves as a flushing liquid outlet to clean the wound during surgery.

[0051] As shown in Figures 6-7 The bending device is composed of a bending knob 8, a set of bending disc positioning beads 30, a bending shaft 23, a bending connecting pin 24, a bending disc 25, a disc inlay 31, a bending connecting rod 26, a joint connecting rod 27, and a bending joint assembly 19. The bending knob 8 is composed of an upper bending knob 8-1 and a lower bending knob 8-2. The two are fixed by the cooperation of the column of the upper bending knob 8-1 and the groove of the lower bending knob 8-2 and are matched with the lower end of the bending shaft 23 to drive the bending shaft 23 to rotate. The bending disc 25 is matched with the upper end of the bending shaft 23 and rotates with the bending shaft 23. The bending disc 25 is provided with a ring-shaped vertical groove on the outer periphery to cooperate with the bending disc positioning beads 17 on both sides which are installed and fixed in the reserved holes of the fixed handle 1. The lower part of the bending connecting pin 24 is matched with the slot of the bending disc 25, and the upper part is matched with the proximal opening of the bending connecting rod 26. The disc inlay 31 is installed in the slot of the bending disc 25 and is welded and fixed. The circular arc surface and the inner ring of the bending disc 25 together form a closed ring to limit the bending connecting pin 24 from sliding and falling off.

[0052] The joint connecting rod 27 is sleeved on the stepped structure at the distal end of the bending connecting rod 26. When the suture is installed, the joint connecting rod 27 is connected with the bending connecting rod 26. A limiting ring is extruded on the joint connecting rod 27 at the position corresponding to the groove of the bending connecting rod 26 to ensure that the joint connecting rod 27 is connected with the bending connecting rod 26 with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod 27 passes through the reserved hole of the joint container 19-6 and is matched and installed with the pin on the left joint head 19-1.

[0053] The bending joint assembly 19 is composed of a left joint head 19-1, a right joint head 19-2, a pulley 19-3, a joint head right pin 19-4, a joint head left pin 19-5 and a joint container 19-6. Two pulleys 19-3 are installed on the pulley pin of the right joint head 19-2, and then the left joint head 19-1 and the right joint head 19-2 are combined and installed in the joint container 19-6, and are cooperatively installed by the joint head right pin 19-4 and the joint head left pin 19-5, and the proximal end of the joint container 19-6 is welded and fixed with the distal end of the sleeve 6. The combined joint head can rotate around the axis of the joint head right pin 19-4 and the joint head left pin 19-5.

[0054] As shown in Figure 8 , the proximal end of the suture wire 10 passes through the fixed handle 1 through two suture wire pulleys 11 fixed by the pulley fixing pin 12, is fastened and connected with the proximal end of the movable handle 9 through the wire lock 13, passes through the sleeve 6 at the distal end, and passes between the two pulleys 19-3 in the bending joint assembly 19, and is connected with the rack seat 21-1 in the suture needle holding assembly 21 for driving the suture needle holding assembly to continuously suture. Pressing the movable handle 9, the proximal end of the suture wire 10 is pulled to move upward, changes direction through the two suture wire pulleys 11, pulls the rack seat 21-1 to move proximally, compresses the rack return spring 28 in the jaw short tube 20, at the same time drives the rack 21-2 to move proximally, drives the gear assembly and the suture needle to move; then releases the movable handle 9, the compressed rack return spring 28 resets, pushes the rack seat 21-1 to move distally, at the same time drives the rack 21-2 to move distally, and then drives the gear assembly and the suture needle to reset, so as to realize the surgical suture operation.

[0055] As shown in Figures 9-11 , the proximal end of the suture wire 10 passes through the fixed handle 1 through two suture wire pulleys 11 fixed by the pulley fixing pin 12, is fastened and connected with the proximal end of the movable handle 9 through the wire lock 13, passes through the sleeve 6 at the distal end, and passes between the two pulleys 19-3 in the bending joint assembly 19, and is connected with the rack seat 21-1 in the suture needle holding assembly 21 for driving the suture needle holding assembly to continuously suture. Pressing the movable handle 9, the proximal end of the suture wire 10 is pulled to move upward, changes direction through the two suture wire pulleys 11, pulls the rack seat 21-1 to move proximally, compresses the rack return spring 28 in the jaw short tube 20, at the same time drives the rack 21-2 to move proximally, drives the gear assembly and the suture needle to move; then releases the movable handle 9, the compressed rack return spring 28 resets, pushes the rack seat 21-1 to move distally, at the same time drives the rack 21-2 to move distally, and then drives the gear assembly and the suture needle to reset, so as to realize the surgical suture operation.

[0056] The suture needle holding assembly 21 is composed of a rack seat 21-1, a rack 21-2, a pressing plate guide pin 21-3, a pressing plate spring 21-4, a needle loading pressing plate 21-5, a needle loading pressing plate positioning screw 21-6, an upper plier head 21-7, a retreat preventing needle 21-8, a connecting piece 21-9, a needle pushing spring tube 21-10, a needle pushing piece 21-11, a needle pushing spring 21-12, a lower plier head 21-13, a gear 21-14, a gear washer 21-15, and a connecting piece positioning pin 21-16. The rack seat 21-1 and the rack 21-2 are fixed by welding, the gear 21-14 and the rack 21-2 are engaged, and are respectively installed in the rack groove and the gear groove of the lower plier head 21-13. The gear 21-14 rotates around the central axis of the gear washer 21-15, drives the proximal end of the connecting piece 21-9 through the connecting piece positioning pin 21-16, and limits the movement of the connecting piece 21-9 along the U-shaped groove through the limiting long hole of the connecting piece 21-9 and the limiting column of the lower plier head 21-13. The needle pushing spring tube 21-10 cooperates with the distal end of the connecting piece 21-9 to limit the movement of the connecting piece 21-9 along the U-shaped groove. The needle pushing spring 21-12 is installed below the needle pushing piece 21-11, and the two are installed inside the needle pushing spring tube 21-10. The upper plier head 21-7 cooperates with the lower plier head 21-13 to fix the internal rack and gear assembly and the retreat preventing needle assembly. The retreat preventing needle 21-8 cooperates with the upper plier head 21-7 to be fixed, the proximal end of the upper plier head 21-7 is provided with the pressing plate guide pin 21-3, the pressing plate spring 21-4 is installed at the proximal end of the needle loading pressing plate 21-5 and cooperates with the pressing plate guide pin 21-3 to be installed, and the needle loading pressing plate positioning screw 21-6 cooperates with the threaded hole in the middle of the upper plier head 21-7 to fix the needle loading pressing plate 21-5 and limit the movement position of the needle loading pressing plate 21-5.

[0057] When loading the needle, the suture needle holding assembly cooperates with the suture cartridge assembly to press the needle loading button 3, the pressing plate wire pulls the needle loading pressing plate 21-5 to move to the proximal end along the track limited by the needle loading pressing plate positioning screw 21-6, exposes the annular suture needle groove, cooperates the proximal end of the suture cartridge assembly with the plier head, releases the needle loading button 3 after the suture needle is placed, resets the needle loading pressing plate 21-5, and fixes the suture needle in the suture needle installation groove 21-17. After use, press the needle loading button 3 again, the needle loading pressing plate 21-5 moves to the proximal end, the needle pushing piece 21-11 is pushed out of the suture needle due to the extension of the needle pushing spring 21-12, the needle loading button 3 is released, the needle loading pressing plate 21-5 is reset, and it is convenient and fast.

Claims

1. An endoscopic stapler, characterized in that: It includes a fixed handle, a fixing bolt, a needle loading button, a rotating assembly, a flushing assembly, a cannula, a protective cap, a bending device, a movable handle, a suture wire, a pressure plate wire, a short tube of the clamp head and a suture needle holding assembly; The upper end of the movable handle is provided with a movable handle mounting hole, which is installed corresponding to the movable handle mounting post of the fixed handle. The proximal end of the sleeve passes through the sleeve hole at the distal end of the fixed handle and fits into the groove at the distal end of the rotating connecting rod. The distal end of the sleeve is connected to the bending joint assembly; the proximal end of the short tube of the pliers head is connected to the bending joint assembly, and the distal end of the short tube of the pliers head is connected to the suture needle holding assembly; The proximal end of the suture wire passes through two suture wire pulleys fixed by pulley fixing pins and passes through the fixed handle, and is fastened to the proximal end of the movable handle by a wire lock buckle. The distal end passes through the sleeve and passes between the two pulleys in the bending joint assembly, and is connected to the rack seat in the suture needle holding assembly for driving the suture needle holding assembly for continuous suturing. The flushing connection port is embedded in the upper rotating thumbwheel and connected to the flushing hole at the proximal end of the cannula; The proximal end of the protective cap is put on the suture needle holding assembly, and the distal end is sealed; The proximal end of the pressure plate steel wire passes around the pressure plate steel wire pulley fixed by the pulley fixing pin, and is fixed in the needle loading button and the steel wire clamp, and the distal end passes through the pressure plate steel wire tube, the rack seat, the pressure plate guide pin and the pressure plate spring, and the pressure plate steel wire is fixedly connected to the needle loading pressure plate.

2. An endoscopic stapler according to claim 1, characterized in that: The rotating assembly includes a rotating dial, a rotating dial positioning bead, a rotating connecting rod and four fixing pins; the rotating connecting rod has a plurality of protrusions at the distal end, which cooperate with a plurality of transverse grooves at the proximal end of the sleeve to fix it; the proximal end of the rotating connecting rod has a circular transverse depression, which cooperates with the hemispherical protrusions at the front end of the positioning beads on both sides; The positioning bead of the rotating dial is fixed in the reserved hole of the fixed handle; The rotary dial is divided into two parts, the upper rotary dial and the lower rotary dial, which are fixed to each other by four fixing pins. The vertically protruding reinforcement ribs inside the rotary dial cooperate with the vertical grooves at the proximal end of the sleeve during installation, and are then fixed by four fixing pins. Rotating the rotary dial will drive the sleeve, and then drive the rotary connecting rod to rotate. The rotary dial positioning beads will sequentially replace the slots that cooperate with the rotary connecting rod to achieve the fixation of the rotation angle.

3. The endoscopic stapler according to claim 1, characterized in that: The bending device is composed of a bending dial, a bending turntable positioning bead, a bending shaft, a bending connecting pin, a bending turntable, a turntable insert, a bending connecting rod, a joint connecting rod and a bending joint assembly; The bending dial wheel is composed of an upper bending dial wheel and a lower bending dial wheel, and the two are fixed by the support column of the upper bending dial wheel and the groove of the lower bending dial wheel, and cooperate with the lower end of the bending shaft to drive the bending shaft to rotate; The bending turntable cooperates with the upper end of the bending shaft and rotates with the bending shaft. At the same time, there is an annular vertical groove on the outer circumference of the bending turntable, which cooperates with the bending turntable positioning beads on both sides. The bending turntable positioning beads are installed and fixed in the reserved holes of the fixed handle. The lower part of the bending connecting pin fits in the notch opened in the bending turntable, and the upper part cooperates with the proximal end opening of the bending connecting rod. The turntable insert is installed in the notch of the bending turntable; The bending dial is fixed in the slot at the far end of the fixed handle by a bending shaft and a bending turntable. The lower end of the bending connecting pin fits in the slot of the bending turntable, and the upper end is connected to the joint connecting rod. The joint connecting rod is connected to the bending joint assembly through the bending connecting rod. By rotating the bending dial, the bending shaft, the bending turntable, the bending connecting pin and the joint connecting rod are driven, so that the bending connecting rod drives the bending joint assembly to generate bending movement, thereby realizing the bending of the suture needle holding assembly.

4. The endoscopic stapler according to claim 3, characterized in that: The proximal end of the joint connecting rod is sleeved on the step structure at the distal end of the bending connecting rod. When the suturing device is installed, after the joint connecting rod and the bending connecting rod are connected, a limiting ring is squeezed out at a position on the joint connecting rod corresponding to the groove of the bending connecting rod to ensure that the joint connecting rod is connected to the bending connecting rod with a certain degree of freedom and will not fall off. The distal end of the joint connecting rod passes through the reserved hole of the joint container and is installed in conjunction with the pin on the left joint head.

5. The endoscopic stapler according to claim 3, characterized in that: The bending and turning joint assembly consists of a left joint head, a right joint head, a pulley, a right pin of the joint head, a left pin of the joint head and a joint container; The two pulleys are installed on the pulley pin of the right joint head, and then the left joint head and the right joint head are combined and installed in the joint container, and are matched with the right pin of the joint head and the left pin of the joint head, and the proximal end of the joint container is welded and fixed to the distal end of the sleeve. The combined joint head can rotate around the axial direction of the right pin of the joint head and the left pin of the joint head.

6. The endoscopic stapler according to claim 1, characterized in that: The flushing assembly includes a flushing connection port, a flushing port protective cover, a flushing liquid catheter and an anti-backflow sealing plug; when the flushing liquid catheter is installed, the distal end enters from the cannula flushing port and extends toward the distal end of the cannula, and the proximal port of the flushing liquid catheter is provided with a fixing ring, which fits with the outer edge of the cannula flushing port and is pressed and fixed by the upper rotating dial. The anti-backflow sealing plug is made of soft silicone, and is provided with small holes for the flushing liquid catheter, pressure plate steel wire tube, suture steel wire, and joint connecting rod to pass through at corresponding positions. It is installed at the distal end of the cannula and tightly fixed; the flushing connection port is installed in the flushing hole at the distal end of the upper rotating dial and the flushing hole of the cannula, the proximal end of the cannula and the rotating connecting rod are fixedly connected by a slot, the upper end of the flushing connection port is used to connect to the external flushing liquid pipe, the flushing connection port and the flushing liquid catheter form a water channel, and the connection of the bending joint assembly serves as the flushing liquid outlet to clean the wound during surgery.

7. The endoscopic stapler according to claim 1, characterized in that: The suture needle holding assembly includes a needle loading assembly, a rack assembly, a gear assembly, a rack return spring and a suture needle; The short tube of the pliers head is connected to the distal end of the bending joint assembly, the distal end of the suture wire is fixedly connected to the rack seat of the rack assembly, the rack assembly is elastically connected to the rack seat through a rack reset spring, and the gear in the gear assembly is meshed with the rack in the rack assembly; the suture wire, the rack, and the rack seat constitute the driving device of the entire suture needle holding assembly, when the suture wire pulls the rack seat to move, it drives the rack to move toward the proximal end, compressing the rack reset spring, and the gear rotates clockwise as the rack moves, thereby causing the gear to rotate clockwise. The wheel washer and the connecting piece positioning pin rotate with the gear. Since the connecting piece is limited by the column in the middle of the lower clamp head, the push needle and the push needle spring tube are displaced in an arc shape along the arc groove at the far end of the lower clamp head; when the suture wire begins to relax, the rack return spring stretches, pushing the rack seat and the rack to move toward the far end, and the gear rotates counterclockwise under the drive of the rack. The gear washer and the connecting piece positioning pin also rotate counterclockwise, causing the connecting piece to drive the push needle and the push needle spring tube to retreat, and so on, causing the suture needle to perform reciprocating circular motion.

8. The endoscopic stapler according to claim 7, characterized in that: The proximal end of the rack assembly has a short tube of the pliers head for the rack reset spring. The rack reset spring will not be compressed and cause deflection. At the same time, when the suture needle is operated to the extreme position, the rack seat will press against the bending joint assembly, and the short tube of the pliers head and the suture needle holding assembly are fixedly connected to ensure the normal reset of the suture needle.

9. The endoscopic stapler according to claim 7, characterized in that: The gear assembly includes a gear, a gear gasket, a connecting plate positioning pin and a connecting plate; the gear cooperates with the gear gasket, the gear gasket has an eccentric limiting long hole, the connecting plate positioning pin cooperates with the eccentric long hole on the gear gasket and the connecting hole at the proximal end of the connecting plate for positioning, the connecting plate has a limiting long hole in the middle, which cooperates with the limiting column of the lower clamp head, the connecting plate is used to connect the gear and the suture needle, and the limiting long hole in the middle of the connecting plate limits the connecting plate to ensure the maximum movement range of the connecting plate.

10. The endoscopic stapler according to claim 1, characterized in that: The protective cap is made of silicone or rubber and has four reinforcing ribs inside.

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