Surgical thread hook

Abstract

The present invention relates to a surgical thread hooking device, comprising a hook needle positioning guide seat and a hook needle, the hook needle having a puncture tip and a hook needle opening, the hook needle axially positioning and slidingly fitting on the hook needle positioning guide seat, a mandrel hole leading to the hook needle opening is provided in the hook needle, a wire pressing mandrel axially slidingly fitting in the mandrel hole, one end of the wire pressing mandrel is a wire pressing end that can slide into and out of the hook needle opening, and the other end is an operating end for driving the wire pressing end to enter and exit the hook needle opening, an electric drive device comprises a driving motor, the driving motor drives the hook needle axially to slide through a transmission mechanism, the hook needle comprises a hook needle body and a tubular driving shaft on which the hook needle body is installed, the driving shaft axially slidingly fitting on the hook needle positioning guide seat, the driving shaft is connected to the output end of the transmission mechanism, the wire pressing mandrel comprises a mandrel body and a mandrel driving rod, the mandrel driving rod is provided with a mandrel driving mechanism for pulling and driving the mandrel driving rod to achieve the wire pressing end of the wire pressing mandrel entering and exiting the hook needle opening. The invention has the advantages of automatic driving and reliable wire hooking operation.

Description

Technical Field

[0001] The invention relates to a surgical instrument, more specifically to a surgical thread hook. Background Art

[0002] In surgical procedures for wrist fractures, Kirschner wires are usually inserted into the fracture ends and then fixed with sutures. However, due to the small bone gap between the carpal bones, the surgical suture needle must pass through the soft tissue between the two carpal bones so that the surgical thread can sew the soft tissue, which makes the surgical operation difficult. In order to solve the above problem, a puncture needle is used to introduce the suture, and then the thread is hooked out by a thread hooker to complete the suture operation. The existing thread hooker usually includes a hook needle and a handle. The handle is held to manually operate the thread hook, which has the defect of inconvenient operation. Summary of the invention

[0003] Purpose of the invention: To overcome the defects of the prior art, the present invention provides a surgical thread hooker with automatic drive and reliable thread hooking operation, which has the advantages of stable and reliable thread hooking and improved surgical efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A method comprising a hook needle positioning guide seat and a hook needle, wherein the hook needle has a puncture tip and a hook thread opening adjacent to the puncture tip, wherein the hook needle is axially positioned and slidably fitted on the hook needle positioning guide seat, wherein a core shaft hole leading to the hook thread opening is provided in the hook needle, wherein a wire pressing core shaft is axially slidably fitted in the core shaft hole, wherein one end of the wire pressing core shaft is a wire pressing end that can slide into and out of the hook thread opening, and the other end of the wire pressing core shaft is an operating end for driving the wire pressing end to enter and exit the hook thread opening, wherein the hook needle is fitted with an electric drive device, wherein the electric drive device includes a drive motor And a transmission mechanism, a driving motor drives the crochet hook to slide axially through the transmission mechanism, the crochet hook includes a crochet hook body and a driving shaft for installing the crochet hook body, the driving shaft axially slides and fits on the crochet hook positioning guide seat, the driving shaft is tubular, and the driving shaft is connected to the output end of the transmission mechanism, the wire pressing core shaft includes a core shaft body inserted into the crochet hook body and a core shaft driving rod inserted into the driving shaft, the core shaft driving rod is matched with a core shaft driving mechanism for pulling and driving the core shaft driving rod to achieve the wire pressing end of the wire pressing core shaft entering and exiting the hook wire opening.

[0006] By adopting the above technical scheme, during operation, the hook needle is positioned and guided by the hook needle positioning guide seat fixed on the gun-shaped hand handle, and the hook needle is electrically driven to move axially to achieve the hooking operation. After the surgical suture enters the hooking mouth, it is pressed and fixed by the pressing end of the core shaft, so that the surgical suture is reliably clamped and fixed, which has the advantages of convenient and reliable operation.

[0007] Preferably, the spindle driving mechanism includes a toggle device installed on the hook needle positioning guide seat and surrounding the driving shaft, the toggle device includes an annular seat shell, a toggle block radially slidingly matched in the annular seat shell, one end of the toggle block corresponding to the driving shaft is a stop toggle end that can extend out of the annular seat shell, the other end of the toggle block is abutted against a toggle block spring, a driving inclined surface is provided at the rear of the stop toggle end of the toggle block, and driving inclined surfaces are provided at both axial ends of the toggle block, the axial top end of the spindle driving rod is provided with an annular pushing step groove, an annular toggle groove is provided circumferentially at the axial end near the tail of the spindle driving rod, the top pushing step groove of the spindle driving rod extends out of the upper port of the driving shaft, the upper port of the driving shaft is pushed and matched with the driving inclined surface, and a toggle groove is provided on the driving shaft A window is exposed for the stop and toggle end of the shift block to be inserted into the toggle groove, and the window has an axial height extending along the axial direction of the drive shaft to form a relative axial movement of the shift block in the window. The two axial end faces of the window are pushed together with the driving inclined surface. When the spindle body exits the hook line mouth position, the pushing step groove is higher than the upper port of the drive shaft by a distance corresponding to the moving stroke of the wire pressing spindle and the position of the toggle groove corresponding to the upper end face of the window. When the hook needle is in the initial position of the insertion action, the window of the drive shaft is higher than the upper port of the annular seat shell of the toggle device or the stop and toggle end of the shift block is correspondingly inserted into the toggle groove. When the hook needle is in the end position of the insertion action, the step surface of the pushing step groove corresponds to the lower port of the annular seat shell and is close to the stop and toggle end of the shift block. When the thread hooking operation is carried out, the driving shaft moves downward axially, and the core shaft driving rod in the driving shaft moves synchronously, and the window of the driving shaft moves to the position of entering the toggle device. Under the drive of the toggle block spring, the stop toggle end is stuck in the toggle groove along the window, thereby realizing that the core shaft driving rod is restricted, and the core shaft driving rod is displaced and increased relative to the driving shaft. As the driving shaft moves downward, until the driving inclined surface of the toggle block abuts the upper end surface of the window, the toggle block is forced to move and exit the toggle groove until it exits the window, so that the pressing end of the core shaft body can reliably exit the hook thread opening. After the hook needle is punctured in place, the toggle block is stuck in the pushing step groove under the action of the toggle block spring. Thereafter, the driving shaft rises axially, and the core shaft driving rod is restricted under the holding of the toggle block, and the relative displacement of the core shaft driving rod in the driving shaft decreases, so that the pressing end of the core shaft body extends into the hook thread opening to realize the clamping and fixing of the surgical suture, making the thread hooking operation more reliable. As the driving shaft rises, the upper end of the driving shaft abuts the driving inclined surface, and the toggle block moves and exits the pushing step groove.

[0008] Preferably, the two axial end surfaces of the window are inclined surfaces arranged opposite to each other. Under this structural design, the inclined surface cooperates with the driving inclined surface, which has the advantage of reliable cooperation.

[0009] Preferably, the upper end surface of the driving shaft is an inclined surface, and the inclined surface is matched with the driving inclined surface, which has the advantage of reliable matching.

[0010] Preferably, the transmission mechanism includes a driving arm, one end of which is fixed on the driving shaft, and the other end of which is connected to a driving nut, which is matched with a driving screw, and the driving screw is positioned and rotated to match the hook needle positioning guide seat, and a transmission bevel gear is provided on the driving screw, and the transmission bevel gear is matched with a driving bevel gear, and the driving bevel gear is installed on the motor shaft of the driving motor, and the driving motor is installed on the hook needle positioning guide seat near the gun-shaped hand-held handle. Under this structural design, the driving screw is driven to rotate by the driving bevel gear and the transmission bevel gear, thereby driving the driving nut to rotate, and then driving the driving shaft to move axially, so that the driving motor is installed on the hook needle positioning guide seat near the gun-shaped hand-held handle, so that the weight is concentrated on the gun-shaped hand-held handle, making the puncture needle puncture operation more stable and reliable.

[0011] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a surgical thread hook device in an application state according to a specific embodiment of the present invention;

[0013] Figure 2 for Figure 1 A partial enlarged view of part A;

[0014] Figure 3 The crochet structure of the specific embodiment of the present invention is shown in FIG. Figure 1 ;

[0015] Figure 4 The crochet structure of the specific embodiment of the present invention is shown in FIG. Figure 2 ;

[0016] Figure 5 It is a schematic structural diagram of an electric drive device for a crochet hook according to a specific embodiment of the present invention. DETAILED DESCRIPTION

[0017] See attached Figures 1 to 5The present invention discloses a surgical thread hook 2, which cooperates with a surgical thread guide 1 to achieve threading and thread hooking operations. The surgical thread guide 1 includes a gun-shaped hand-held handle 11, which includes a gripping handle 111, a needle seat 112 and an upper thumb hook ring 113. The bottom of the needle seat 112 is connected to the gripping handle 111, and the upper thumb hook ring 113 is provided on the upper end of the needle seat 112. This makes the hand-held gun-shaped hand-held handle 11 more stable and reliable. The gun-shaped hand-held handle 11 is fixed with a threading handle 113. The needle 12 and the needle seat 112 are used to fix the puncture needle 12. The needle head of the puncture needle 12 is provided with a thread fixing structure for clamping and fixing the thread head in a detachable manner. The thread fixing structure can be a needle hole, but there is insufficient tension force for the surgical suture. However, the gun-shaped hand-held handle 11 is provided with a surgical thread positioning device for the surgical thread to pass through at the tail position of the puncture needle 12. The surgical thread positioning device and the thread fixing structure are used to realize the surgical suture along the puncture needle 12 and tensioned on the side of the puncture needle 12. The surgical hook The thread guide 2 includes a hook needle positioning guide seat 21 and a hook needle 22. The hook needle positioning guide seat 21 is positioned and fixed on the gun-shaped hand handle 11. The hook needle 22 has a puncture tip 221 and a hook thread opening 222 adjacent to the puncture tip 221. The hook needle 22 is axially positioned and slidably matched on the hook needle positioning guide seat 21. The hook needle 22 is provided with a core shaft hole 223 leading to the hook thread opening. A wire pressing core shaft 224 is axially slidably matched in the core shaft hole 223. One end of the wire pressing core shaft 224 can slide into , the wire pressing end 2241 slides out of the hook wire mouth, and the other end of the wire pressing core shaft 224 is an operating end for driving the wire pressing end 2241 to enter and exit the hook wire mouth. After the surgical suture enters the hook wire mouth, it is pressed and fixed by the wire pressing end 2241 of the core shaft, thereby facilitating the surgical suture to escape from the fixed wire structure. The hook needle 22 and the puncture needle 12 are matched at an angle, and under the guidance of the hook needle positioning guide seat 21, the hook wire mouth formed by the hook needle 22 can reach the rear of the needle head of the puncture needle 12 to achieve the tensioned surgical suture entering the hook wire mouth. During operation, the gun-shaped handle 11 is held to insert the puncture needle 12 into the soft tissue at the bone gap at a certain angle, and the surgical suture is brought into the soft tissue through the puncture needle 12. Then the hook needle 22 is inserted. The hook needle 22 is positioned and guided by the hook needle positioning guide seat 21 fixed on the gun-shaped handle 11, so that the puncture tip 221 of the hook needle 22 is inserted between the puncture needle 12 and the surgical suture. Since the surgical suture is tensioned, when the hook thread opening is reached, the surgical suture enters the hook thread opening, and the hook needle 22 is pulled out to hook the surgical suture and bring it out; the cooperation of the puncture needle 12 and the hook needle 22 achieves suture operation in a narrow space, overcoming the defect that the traditional surgical needle tip is inconvenient to operate when inserting and passing through a narrow space.

[0018] The crochet needle 22 is equipped with an electric drive device, which includes a drive motor 23 and a transmission mechanism. The drive motor 23 drives the crochet needle 22 to slide axially through the transmission mechanism. The crochet needle 22 includes a crochet needle body 22-1 and a drive shaft 22-2 for installing the crochet needle body 22-1. The drive shaft 22-2 is axially slidably matched on the crochet needle positioning guide seat 21. The drive shaft 22-2 is tubular and connected to the output end of the transmission mechanism. The wire pressing core shaft 224 includes a core shaft body 224-1 inserted into the crochet needle body 22-1 and a core shaft driving rod 224-2 inserted into the driving shaft 22-2. The core shaft driving rod 224-2 is equipped with a core shaft driving mechanism for pulling the driving core shaft driving rod 224-2 to achieve the wire pressing end 2241 of the wire pressing core shaft 224 entering and exiting the hook wire mouth. The motor switch for controlling the switch of the drive motor 23 is arranged on the gun-shaped hand handle 11. The hook needle 22 is electrically driven to move axially to achieve the thread hooking operation, which has the advantages of convenient and reliable operation.

[0019] Furthermore, the spindle drive mechanism includes a toggle 24 installed on the hook needle positioning guide seat 21 and surrounding the drive shaft 22-2. The toggle 24 includes an annular seat shell 241, a toggle block 242 radially slidingly fitted in the annular seat shell 241, and one end of the toggle block 242 corresponding to the drive shaft 22-2 is a stop toggle end 2421 that can extend out of the annular seat shell 241. The other end of the toggle block 242 is abutted against a toggle block spring 243. A driving inclined surface 2422 is provided behind the stop toggle end 2421 of the toggle block 242. Both axial ends of the toggle block 242 have driving inclined surfaces. 2422, the top axial end of the mandrel driving rod 224-2 has an annular push step groove 224-21, and the mandrel driving rod 224-2 is provided with an annular toggle groove 224-22 along the circumferential direction near the tail of the axial direction. The top push step groove 224-21 of the mandrel driving rod 224-2 extends out of the upper end of the driving shaft 22-2, and the upper end of the driving shaft 22-2 is pushed and matched with the driving inclined surface 2422. The upper end surface 22-23 of the driving shaft 22-2 is an inclined surface, and the driving shaft 22-2 is provided with a toggle groove 224-22 to expose the toggle block The stop toggle end 2421 of 242 is inserted into the window 22-21 of the toggle groove 224-22. The window 22-21 has an axial height extending along the axial direction of the drive shaft 22-2 to form a relative axial movement of the toggle block 242 in the window 22-21. The axial end faces of the window 22-21 are pushed together with the driving inclined surface 2422. The axial end faces of the window 22-21 are inclined surfaces arranged oppositely. When the core shaft body 224-1 exits the hook line mouth position, the push step groove 224-21 is higher than the corresponding wire pressing core shaft of the upper port of the drive shaft 22-2 The distance of the moving stroke of 224 and the toggle groove 224-22 correspond to the upper end surface position of the window 22-21. When the hook needle 22 is located at the initial position of the insertion action, the stop toggle end 2421 of the toggle block 242 is correspondingly inserted into the toggle groove 224-22 (or the window 22-21 of the driving shaft 22-2 is higher than the upper end of the annular seat shell 241 of the toggle device 24). When the hook needle 22 is located at the end position of the insertion action, the step surface of the push step groove 224-21 corresponds to the lower end of the annular seat shell 241 and is close to the stop toggle end 2421 of the toggle block 242.During the line hooking operation, the driving shaft 22-2 moves axially downward, the core shaft driving rod 224-2 in the driving shaft 22-2 moves synchronously, and the window 22-21 of the driving shaft 22-2 moves to the position of entering the toggle 24. The toggle block 242 is driven by the toggle block spring 243, and the stop toggle end 2421 is inserted into the toggle groove 224-22 along the window 22-21, so that the core shaft driving rod 224-2 is restricted, and the core shaft driving rod 224-2 moves upward relative to the driving shaft 22-2. As the driving shaft 22-2 moves downward, until the driving inclined surface 2422 of the toggle block 242 hits the upper end surface of the window 22-21, the toggle block 242 is forced to move out of the toggle groove 224-22 until it exits the window 22-21, reaching The pressing end 2241 of the core shaft body 224-1 can reliably withdraw from the hook thread opening. After the hook needle 22 is pierced into place, the shift block 242 is stuck into the pushing step groove 224-21 under the action of the shift block spring 243. After that, the drive shaft 22-2 rises axially, and the core shaft driving rod 224-2 is restricted under the retention of the shift block 242. The core shaft driving rod 224-2 is relatively displaced and decreased in the drive shaft 22-2, so that the pressing end 2241 of the core shaft body 224-1 is extended into the hook thread opening to achieve the clamping and fixation of the surgical suture, making the hook thread operation more reliable. As the drive shaft 22-2 rises, the upper end of the drive shaft 22-2 contacts the driving inclined surface 2422, and the shift block 242 moves out of the pushing step groove 224-21. Preferably, when the hook needle 22 is located at the initial position of the insertion action, the stop and push end 2421 of the push block 242 is correspondingly inserted into the push groove 224-22, and the driving motor drives the hook needle to move up to the initial position when driving the hook needle to pull out the needle, and then drives the hook needle to move down, so as to realize the action of loosening the surgical suture by the thread pressing core shaft.

[0020] In this specific embodiment, the transmission mechanism includes a driving arm 25, one end of which is fixed on the driving shaft 22-2, and the other end of the driving arm 25 is connected to a driving nut 26, which is matched with a driving screw 27, and the driving screw 27 is positioned and rotated to match the hook needle positioning guide seat 21, and a transmission bevel gear 28 is provided on the driving screw 27, and the transmission bevel gear 28 is matched with a driving bevel gear 29, and the driving bevel gear 29 is installed on the motor shaft of the driving motor 23, and the driving motor 23 is installed at the hook needle positioning guide seat 21 near the gun-shaped hand-held handle 11. The driving screw 27 is driven to rotate by the driving bevel gear 29 and the transmission bevel gear 28, thereby driving the driving nut 26 to rotate, and then driving the driving shaft 22-2 to move axially, so that the driving motor 23 is installed at the hook needle positioning guide seat 21 near the gun-shaped hand-held handle 11, so that the weight is concentrated on the gun-shaped hand-held handle 11, so that the puncture operation of the puncture needle 12 is more stable and reliable.

[0021] The above embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention. Those skilled in the art may make corresponding modifications or variations under the guidance of the essence of the present invention. For example, the transmission mechanism may also adopt other transmission forms in the prior art, such as worm gears, etc. Therefore, all equivalent technical solutions fall within the protection scope of the present invention.

Claims

1. A surgical hooking device, comprising a hook needle positioning guide seat and a hook needle, wherein the hook needle has a puncture tip and a hooking port adjacent to the puncture tip, characterized in that: The crochet hook is axially positioned and slidably matched on the crochet hook positioning guide seat, and a core shaft hole leading to the hook thread opening is provided in the crochet hook, and a wire pressing core shaft is axially slidably matched in the core shaft hole, and one end of the wire pressing core shaft is a wire pressing end that can slide in and out of the hook thread opening, and the other end of the wire pressing core shaft is an operating end for driving the wire pressing end to enter and exit the hook thread opening. The crochet hook is matched with an electric drive device, and the electric drive device includes a drive motor and a transmission mechanism. The drive motor drives the crochet hook to slide axially through the transmission mechanism. The crochet hook includes a crochet hook body and a drive shaft for installing the crochet hook body, and the drive shaft axially slides and matches with the crochet hook positioning guide seat The drive shaft is tubular, and the drive shaft is connected to the output end of the transmission mechanism. The wire pressing core shaft includes a core shaft body inserted into the hook body and a core shaft driving rod inserted into the driving shaft. The core shaft driving rod is equipped with a core shaft driving mechanism for pulling and driving the core shaft driving rod to achieve the wire pressing end of the wire pressing core shaft entering and exiting the hook wire opening. The core shaft driving mechanism includes a toggle device installed on the hook needle positioning guide seat and surrounding the drive shaft. The toggle device includes an annular seat shell, a toggle block radially slidingly fitted in the annular seat shell, one end of the toggle block corresponding to the driving shaft is a stop toggle end that can extend out of the annular seat shell, and the other end of the toggle block abuts against the toggle end of the annular seat shell. There is a shift block spring, a driving inclined surface is arranged behind the stop and shift end of the shift block, and both axial ends of the shift block have driving inclined surfaces, the axial top end of the core shaft driving rod has an annular pushing step groove, and the core shaft driving rod is axially provided with an annular shifting groove along the circumferential direction near the tail, and the top pushing step groove of the core shaft driving rod extends out of the upper port of the driving shaft, and the upper port of the driving shaft pushes and cooperates with the driving inclined surface, and a window is provided on the driving shaft for exposing the shifting groove so that the stop and shifting end of the shift block can be inserted into the shifting groove, and the window has an axial height extending along the axial direction of the driving shaft to form an axial relative movement of the shift block in the window, and the axial end surfaces of the window are The driving inclined surface pushes and cooperates. When the core shaft body exits the hook line mouth position, the pushing step groove is higher than the upper port of the driving shaft corresponding to the distance of the moving stroke of the wire pressing core shaft and the toggle groove corresponds to the upper end surface position of the window. When the hook needle is at the initial position of the piercing action, the window of the driving shaft is higher than the upper port of the annular seat shell of the toggle device or the stop toggle end of the toggle block and is correspondingly inserted into the toggle groove. When the hook needle is at the end position of the piercing action, the step surface of the pushing step groove corresponds to the lower port of the annular seat shell and is close to the stop toggle end of the toggle block. The two axial end surfaces of the window are relatively arranged inclined surfaces, and the upper end surface of the driving shaft is an inclined surface.

2. The surgical thread hook according to claim 1, characterized in that: The transmission mechanism includes a driving arm, one end of which is fixed on the driving shaft, and the other end of the driving arm is connected to a driving nut, which is matched with a driving screw, and the driving screw is positioned and rotated to match the crochet positioning guide seat, and a transmission bevel gear is provided on the driving screw, and the transmission bevel gear is matched with a driving bevel gear, and the driving bevel gear is installed on the motor shaft of the driving motor, and the driving motor is installed on the crochet positioning guide seat near the gun-shaped handheld handle.

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