Roller needle-holding stitching instrument

Abstract

The invention relates to a roller needle-holding stitching instrument. The roller needle-holding stitching instrument comprises an input part and an output part, wherein the input part is manually controlled and operated at the rear end; the rear-end hand-controlled input part comprises a trigger, a lever, a transmission gear, a transmission rod and a return device, and the front-end needle-holding and suturing output part comprises an upper jaw, a lower jaw, a first roller and a second roller, wherein the first roller and the second roller are arranged in the upper jaw and the lower jaw. When a hand presses the trigger to the bottom and loosens the trigger, the upper jaw and the lower jaw at the front end are closed to realize a needle holding function, and when the hand presses the rotary handle, the upper roller and the lower roller roll to drive the needle to rotate to realize a sewing function.

Description

Technical Field

[0001] This invention relates to a needle-holding medical device for suturing, comprising a rear-end manual control input section and a front-end needle-holding and suturing output section. The rear-end manual control input section includes a clamping handle, a rotating handle, a transmission gear, a connecting rod, and a return device. The front-end needle-holding and suturing output section consists of an upper jaw, a lower jaw, and upper and lower rollers therein. When the clamping handle is pressed down fully and released, the front-end upper and lower jaws close, achieving the needle-holding function. When the rotating handle is pressed down, the upper and lower rollers rotate, causing the needle to rotate, achieving the suturing function. Background Technology

[0002] Laparoscopic suturing and knotting surgeries require the use of needle holders to hold the suture needle. The suture needle is a curved needle designed for wrist rotation. Laparoscopic suturing and knotting surgeries require the use of the wrist to control the needle holder and operate the curved needle, rotating it 90-180° around the axis of the needle holder inside the patient's body. The ease of rotating the axis of the needle holder is related to the surgeon's right-handedness. To solve this problem, existing technology designs the opposing sides of the needle holder's jaws as two sets of rollers. The curved needle is held by the two sets of rollers, and the rollers are driven to rotate forward or backward to achieve the rotation of the curved needle around the axis of the needle holder by 90-180°. However, while gripping the handle to hold the needle holder tightly, it is difficult to operate the other handles to achieve the forward and reverse rotation of the rollers without releasing the handle.

[0003] Therefore, the existing needle holder needs to be redesigned to keep the needle holder closed when the needle clamp handle is released, and to allow the needle holder to open when needed by simply operating the needle clamp handle. Summary of the Invention

[0004] This invention employs an upper jaw, a lower jaw, and upper and lower rollers forming the front-end needle-holding and sewing output section. A clamping handle, a rotating handle, a transmission gear, a connecting rod, and a return device form the rear-end manual control input section. This achieves the needle-holding function by closing the upper and lower jaws when the clamping handle is fully depressed and released, and the sewing function by rotating the upper and lower rollers and causing the needle to rotate when the rotating handle is depressed. To further achieve the above objectives, the technical solution of this invention is as follows:

[0005] A roller needle holder suture device, comprising:

[0006] The housing has a shaft tube and a handle fixed to its distal and proximal ends, respectively. The handle extends at an angle in the opposite direction to the distal end of the shaft tube along the extension line of the proximal end of the shaft tube.

[0007] The first and second jaws include those configured at the distal end of the shaft tube for gripping an object therebetween.

[0008] A transmission rod, configured within a shaft tube, is axially reciprocating to enable the first jaw to rotate relative to the proximal end of the second jaw. The transmission rod is a compressible and resetting elastic telescopic rod.

[0009] The transmission mechanism and the lever that rotates about the fulcrum are disposed in the housing. The lower end of the lever extends from the housing and into the fan-shaped plane between the handle and the shaft tube. The transmission mechanism is used to move the transmission rod by pushing the lever to move the first jaw relative to the second jaw to the closed position or the open position when the lever rotates about the fulcrum to the position close to or far from the handle, respectively.

[0010] A clamping and returning mechanism is installed between the handle and the lever, the clamping and returning mechanism comprising:

[0011] The groove is configured in the housing and near the handle, with the opening end face of the groove parallel to the fan-shaped plane;

[0012] The positioning rod has one end hinged to a pin on the lever, and the other end is provided with a positioning pin that is ejected by an elastic body and embedded in the groove. The pin is located between the fulcrum and the lower end of the lever.

[0013] The groove includes at least four sequentially connected groove segments: groove segment one, groove segment two, groove segment three, and groove segment four. The connection between each groove segment is constructed as a stepped structure with increasing depth. Groove segment one and groove segment four are interconnected, with their connecting ends facing the pin. The connecting ends of groove segments two and three face the lever. The end of each groove segment closer to the lever is deeper than the end farther from the lever. When the lever and handle are close together, the distances from the pin to the connecting ends of groove segments one and two, and groove segments three and four, are equal. When the lever and handle move from a position away from each other to a position close together, the positioning pin slides to the connection between groove segment one and groove segment two. When the lever relative to the handle is in a position away from each other, causing the first jaw to rotate relative to the second jaw to the open position, the positioning pin slides to the connection between groove segment one and groove segment four. The stroke of groove segment two is no more than 1 / 3 of the stroke of groove segment one.

[0014] Preferably, the transmission mechanism includes a connecting rod disposed within the housing, the two ends of which are rotatably connected to the proximal end of the transmission rod and the upper end of the lever, respectively.

[0015] Furthermore, groove segment one and groove segment four are connected by groove segment five. The end of groove segment five closer to the lever is deeper than the end farther from the lever. The previous and subsequent groove segments in groove segment four, groove segment five, and groove segment one are constructed into a stepped structure with increasing depth at the connection point. The connection point between groove segment five and groove segment one is the position where all groove segments are closest to the lever.

[0016] The first jaws house a concentrically connected first roller and a first gear, while the second jaws house a rotatable second roller with its rotation axis parallel to that of the first roller. When the first jaw rotates to a closed position relative to the second jaws, the first gear drives the first roller, and the first and second rollers drive the needle located therebetween. The first gear is configured to be rotated by a shaft within a tube. Optionally, the second jaws further house a concentrically connected second roller and a second gear. When the first jaw rotates to a closed position relative to the second jaws, the first gear meshes with the second gear, allowing the first gear to drive the second gear, and the first and second rollers drive the needle located therebetween. The second roller and the second gear are configured to be coaxially connected to a shaft within a tube.

[0017] Furthermore, the first roller includes a first groove portion, and the second roller includes a second groove portion, wherein when the first jaws are in the closed position, the first groove portion faces the second groove portion, and the needle is driven between the first groove portion and the second groove portion when the first jaws are in the closed position.

[0018] Preferably, one end of the shaft extending into the housing is coaxially fixed with a bevel gear facing proximal to its proximal end, and the housing is further configured with a bevel gear assembly, including:

[0019] A bevel gear set consists of a pair of bevel gears with their front cones facing each other and fixed on the same gear shaft;

[0020] Gear 1 is coaxially fixed to one end of the gear shaft;

[0021] The gear shaft is rotatably mounted on one end of the slider, and the other end of the slider extends from the window near the end of the housing to the outside of the housing. The extension directions of the gear shaft and the window are both perpendicular to the sector plane. The slider can move along the window so that only one bevel gear in the bevel gear set meshes with the other bevel gear.

[0022] Preferably, the needle holder further includes a ratchet assembly rotatably mounted on a slider for driving a gear to rotate;

[0023] A trigger is configured within the sector-shaped plane, located in the sector region between the end of the lever furthest from the housing and the shaft tube. One end of the trigger is rotatably connected to the housing, and the middle of the trigger is configured to connect one end of an arc-shaped rack. The other end of the arc-shaped rack extends into the housing, and the arc-shaped rack has continuous teeth arranged on the side facing the slider. The arc-shaped rack is used to drive the ratchet assembly to rotate unidirectionally, causing the drive gear to rotate synchronously in one direction.

[0024] Preferably, the ratchet assembly includes gear two, gear three, and a center wheel. Gear three is rotatably mounted on a slider inside the housing and meshes with an arc-shaped rack. The outer circumference of gear two meshes with gear one. The inner circumference of gear two is cut into a saw blade-shaped profile / hole concentric with the outer circumference. The center wheel is concentrically arranged in the saw blade-shaped profile of gear two. One end face of the center wheel is coaxially connected to gear three. The side circumferential surface of the center wheel is provided with at least two pawls symmetrical about the central axis of the center wheel. One end of each pawl is rotatably connected to the center wheel. A spring is arranged between the other end of the pawl and the center wheel. One end of the spring is embedded in the center wheel, and the other end contacts the pawl. When the pawl is opened by the spring, it is embedded in the toothed groove of the saw blade-shaped profile.

[0025] Preferably, the distance between the trigger and the end of the handle furthest from the housing is no greater than the grip width of the palm.

[0026] Preferably, when the lever is in a position away from the handle, the distance between the end of the lever and the end of the handle away from the housing is less than the grip width of the palm.

[0027] This invention enables single-handed operation of clamping and resetting the pliers assembly by clamping and holding the pliers assembly and releasing the pliers assembly through a clamping and resetting mechanism composed of levers, grooves, and transmission mechanisms.

[0028] This invention enables single-handed control of the switching of the roller rotation direction in the clamp head assembly and the driving of the suture needle to rotate unidirectionally in the switched direction through a trigger, bevel gear assembly, and ratchet assembly.

[0029] The roller needle holder of this invention enables suturing operations in laparoscopic surgery without requiring the doctor to rotate their wrist, thus reducing the difficulty of the surgery.

[0030] Although existing technologies also have devices that use locking transmission rods in the shaft tube to keep the clamping head assembly in a clamping state, the shaft tube of this invention has two shafts and needs to extend into the human body, resulting in less space than existing technologies. This makes it difficult to install the locking devices of existing technologies. The clamping and returning mechanism of this invention is installed in a preferred position in the housing, and does not interfere with the transmission mechanism of the clamping head assembly or the bevel gear assembly and ratchet assembly that drive the rollers inside the clamping head assembly, thus ultimately achieving the technical objective of this invention.

[0031] To make the technical problems solved, the technical solutions and the beneficial effects of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the jaws structure;

[0033] Figure 2 This is a schematic diagram of the overall structure of the needle holder;

[0034] Figure 3 This is a schematic diagram of the internal structure of the needle holder;

[0035] Figure 4 This is a schematic diagram of the overall structure of the clamping and recovery mechanism;

[0036] Figure 5 This is a schematic diagram of the positioning rod structure;

[0037] Figure 6 This is a top view of the trench structure.

[0038] Figure 7 This is a schematic diagram of the overall transmission connection of the transmission rod;

[0039] Figure 8 This is a schematic diagram of the specific structure of the transmission rod;

[0040] Figure 9 This is a schematic diagram of the internal structure of the shell;

[0041] Figure 10 A detailed schematic diagram of a portion of the pincers;

[0042] Figure 11 A schematic diagram of the internal structure of the opening jaws;

[0043] Figure 12 This is a cross-sectional view of the jaws;

[0044] Figure 13 This is a schematic diagram of the ratchet assembly structure;

[0045] Figure 14 Top view of the ratchet assembly;

[0046] Figure 15 This is a schematic diagram of the ratchet assembly connection structure within the housing;

[0047] Figure 16 This is a schematic diagram of the ratchet assembly connection. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure. It should be noted that in this invention, the front cone refers to the small end face of the bevel gear; the proximal end or proximal side refers to the side of the needle-holding sewing machine closer to the person when held; and the distal end or distal side refers to the side of the needle-holding sewing machine farther from the person when held.

[0049] As used herein, relative terms such as “below,” “down,” “above,” and “up” can be used to describe the relationship between one element and another, as illustrated in the set of figures. Such relative terms are intended to encompass different orientations of the illustrated technique beyond those described in the set of figures. For example, if the apparatus in the set of figures is flipped over, the various elements described as being “below” other elements would be oriented “up” to the other elements. Similarly, if one of the apparatuses in the figures is flipped over, the various elements described as being “below” or “under” other elements would be oriented “up” to the other elements. Thus, the various example terms “below” and “down” can encompass both above and below orientations. As used herein, relative terms such as “left” and “right” can be used to describe the left and right sides of the central axis of the first roller relative to the vertical direction.

[0050] A roller needle holder suture device, the overall structure of which is as follows: Figure 2 As shown, it includes a housing 46, with a shaft tube 47 fixed to its distal end and a handle 44 fixed to its proximal end. The handle 44 extends obliquely in the opposite direction to the distal end of the shaft tube 47 along the extension line of the proximal end of the shaft tube 47. Figure 1 The distal end of the shaft tube 47 shown is provided with a first jaw 1a and a second jaw 1b for gripping an object therebetween. The proximal end of the second jaw 1b is fixed to the distal end of the shaft tube 47. The proximal end of the first jaw 1a is provided with an ear plate near the second jaw 1b. The ear plate is hinged to the proximal end of the second jaw 1b. An axially movable transmission rod 8 is arranged inside the shaft tube 47. The proximal end of the first jaw 1a is rotatably connected to the distal end of the transmission rod 8. Therefore, the first jaw 1a can rotate relative to the proximal end of the second jaw 1b.

[0051] Furthermore, such as Figure 3 The diagram shows a partial cross-sectional view of the needle holder suture device. The housing 46 also houses a transmission mechanism and a lever 6 that rotates around a fulcrum 9. The lower end of the lever 6 extends from the housing 46 into a fan-shaped plane between the handle 44 and the shaft tube 47. The upper end of the lever 6 and the proximal end of the transmission rod 8 are connected via the transmission mechanism. This mechanism is used to move the transmission rod 8 by pushing the lever 6 when it rotates around the fulcrum 9 to a position close to or far from the handle 44, causing the first jaw 1a to rotate relative to the second jaw 1b to a closed or open position. A pin 12 is also provided between the fulcrum 9 and the lower end of the lever 6. A trigger 45 is located in the fan-shaped plane between the handle 44 and the shaft tube 47. The trigger 45 is located in the fan-shaped area between the lower end of the lever 6 away from the housing 46 and the shaft tube 47. The upper end of the trigger 45 is rotatably connected to the housing 46.

[0052] Specifically, when the lever 6 is in a position away from the handle 44, the distance between the end of the lever 6 and the handle 44 away from the housing 46 is less than the grip width of the palm, and the distance between the trigger 45 and the end of the handle 44 away from the housing 46 is not greater than the grip width of the palm.

[0053] Furthermore, such as Figure 3 As shown, the transmission mechanism is a connecting rod 10 disposed in the housing, and the two ends of the connecting rod 10 are rotatably connected to the proximal end of the transmission rod 8 and the upper end of the lever 6, respectively.

[0054] When a person presses down on lever 6 and rotates it backward around fulcrum 9, it pushes connecting rod 10 forward, which in turn pushes transmission rod 8 forward. Since the ear plate of the first jaw 1a is fixed to the second jaw 1b by pin 7 and hinged to transmission rod 8 by pin 5, when transmission rod 8 moves forward, it pushes the first jaw 1a to rotate counterclockwise around pin 7, thereby closing the first jaw 1a and the second jaw 1b. Similarly, when lever 6 rotates forward around fulcrum 9, the first jaw 1a opens. However, for the convenience of one-handed operation, after the curved needle 2 is clamped, the trigger 45 needs to be operated with one hand to realize the sewing action. Therefore, when the hand presses the lever 6 to release it, the first jaw 1a and the second jaw 1b need to remain clamped. When the hand presses the lever 6 again to release it, the first jaw 1a and the second jaw 1b are opened. To achieve such a reciprocating function, the present invention adds a clamping return mechanism 11 to the lever 6. The clamping return mechanism 11 is hinged to the lever 6 through the pin 12 and can rotate around the pin 12.

[0055] Furthermore, such as Figure 4 and Figure 5 As shown, the clamping return mechanism 11 is located between the handle 44 and the lever 6. The clamping return mechanism 11 includes a groove 17 and a positioning rod 15. The groove 17 is disposed in the housing 46 and close to the handle 44. The opening end face of the groove 17 is parallel to the fan-shaped plane between the handle 44 and the shaft tube 47.

[0056] The positioning rod 15 has one end hinged to the pin 12 on the lever 6, and the other end is provided with a positioning pin 16 that is ejected by the elastic body 14 and embedded in the groove 17. The pin 12 is located between the fulcrum 9 of the lever 6 and the lower end of the lever 6.

[0057] Furthermore, when the clamping and returning mechanism 11 is working, the positioning pin 16 moves back and forth in the groove 17 shown, and the elastic body 14 keeps the pin block 16 pressed downward, thus ensuring the clamping and returning function is achieved.

[0058] Furthermore, the groove 17 includes at least four segments sequentially connected to groove segment 1 20, groove segment 2 19, groove segment 3 18, and groove segment 4 23. In this embodiment, groove segment 1 20 and groove segment 4 23 are also connected by groove segment 5 22. The preceding and following groove segments of each of the above-mentioned groove segments are constructed as a stepped structure with increasing depth at the connection point, which facilitates the positioning pin 16 to slide from the preceding groove segment to the following groove segment without reversing back. Groove segment 1 20 and groove segment 4 23 are interconnected, and their connection ends with groove segment 5 22 all face the pin shaft 12. The connection ends of groove segment 2 19 and groove segment 3 18 face the lever 6. The end of each groove segment closer to the lever 6 is deeper than the end farther from the lever 6, which facilitates the positioning rod 15 to slide autonomously towards the end of each groove segment closer to the lever 6 under the action of the pin block 16. When lever 6 and handle 44 are close together, the distance between the connecting ends of groove section 1 20 and groove section 2 19 and the connecting ends of groove section 3 18 and groove section 4 23 and pin 12 is equal.

[0059] Furthermore, the end of groove segment 5 22 closer to lever 6 is deeper than the end farther from lever 6. The junctions of groove segment 4 23, groove segment 5 22, and groove segment 1 20 are constructed as steps with progressively increasing depths. The junction of groove segment 5 22 and groove segment 1 20 is the closest point of all groove segments to lever 6.

[0060] Furthermore, in the initial state when lever 6 is not close to handle 44, positioning pin 16 is at the junction 21 of groove segment 5 22 and groove segment 1 20 of groove 17. When the hand presses lever 6, positioning pin 16 is pushed along groove segment 1 20 by positioning rod 15, passing the junction of groove segment 1 20 and groove segment 2 19, and reaching the bottom of groove segment 2 19. At this time, lever 6 is completely close to handle 44. When the hand is released, because the previous groove segment and the next groove segment are constructed into a stepped structure with increasing depth at the junction, and the end of each groove segment closer to lever 6 is deeper than the end farther from lever 6, positioning pin 16 will reach the junction of groove segment 2 19 and groove segment 3 18 along the slope of the groove segment and stay at the end of groove segment 3 18 closer to lever 6. Similarly, when the lever 6 is pressed down again, since the groove segment 3 18 is shallower than the groove segment 4 23 at the junction with the groove segment 4 23, the positioning pin 16 will travel along the slope of the groove segment 3 18 to the groove segment 4 23. When the hand is released, the positioning pin 16, under the action of the elastic body 14, slides from the slope of the groove segment 4 23 to the end of the groove segment 4 23 near the lever 6. Since the groove segment 4 23 is shallower than the groove segment 5 22 at the junction with the groove segment 5 22, the positioning pin 16 slides to the groove segment 5 22 and eventually returns to the junction 21 of the groove segment 5 22 and the groove segment 1 20 (since the groove segment 5 22 is shallower than the groove segment 1 21 at the junction with the groove segment 1 21). The lever 6 can reciprocate between the handle 44 and the handle 44 in this cycle, moving closer and locking to each other and moving further away and locking to each other.

[0061] When lever 6 moves from a position away from handle 44 to a position close to it, positioning pin 16 can slide to the junction of groove section 1 20 and groove section 2 19. When lever 6 moves from a position close to handle 44 to a position close to it, positioning pin 16 slides to the junction of groove section 3 18 and groove section 4 23. When lever 6 moves away from handle 44 and causes the first jaw 1a to rotate relative to the second jaw 1b to the open position, positioning pin 16 slides to the junction of groove section 1 20 and groove section 4 23.

[0062] Furthermore, in order to ensure that the locating pin 16 slides from the junction of groove section 10 and groove section 29 to the junction of groove section 29 and groove section 318, the first jaw 1a does not loosen relative to the second jaw 1b when closed, such as... Figure 8 The transmission rod 8 shown is a compressible and resetting elastic telescopic rod. Furthermore, the stroke of groove section 2 19 is no more than 1 / 3 of the stroke of groove section 1 20.

[0063] Furthermore, the transmission rod 8 is a compressible and reset elastic telescopic rod, which can solve the problem of empty travel caused by the groove section 2 19 to the groove section 3 18 and the groove section 3 18 to the groove section 4 23, thus causing the jaw 1 to not close tightly.

[0064] Furthermore, the transmission rod 8 includes a first sleeve 29, a second sleeve 26, a third sleeve 25, and a compression spring 24. The first sleeve 29 is located at one end of the compression spring 24 near the housing 46, while the second sleeve 26 and the third sleeve 25 are located at the other end of the compression spring 24. The second sleeve 26 and the third sleeve 25 can be assembled as one unit, forming an elongated groove 28 between them. One end of the screw 27 is connected to the first sleeve 29 and extends from the compression spring 24 into the elongated groove 28, and can move freely along the elongated groove 28. The compression spring 24 is always in a compressed state. When the lever 6 is pressed by hand, the first sleeve 29 continuously compresses the compression spring 24 forward. When the positioning pin 16 reaches the second groove section 19, the screw 27 moves forward. When the hand is released, the compression spring 24 always provides a clamping force to the elongated groove 28 assembled with the third sleeve 25 and the second sleeve 26, so that the first jaw 1a is always closed relative to the second jaw 1b, and so on.

[0065] Specifically, in order to enable the looper 2 to perform the sewing action by turning the trigger 45 with one hand after it is clamped by the first jaw 1a relative to the second jaw 1b, such as... Figure 10 and Figure 11 , Figure 12 As shown, a first roller 43 and a first gear 42 are concentrically connected in the first jaw 1a, and a second roller 41 and a second gear 40 are concentrically connected in the second jaw 1b. When the first jaw 1a rotates to the closed position relative to the second jaw 1b, the first gear 42 meshes with the second gear 40, so that the first gear 42 can drive the second gear 40, and the first roller 43 and the second roller 41 can drive the bent needle 2 located therebetween. The second roller 41 and the second gear 40 are configured to be coaxially connected with the shaft 34 inside the shaft tube 47.

[0066] The first roller 43 and the second roller 41 can be located outside the first jaw 1a relative to the second jaw 1b, or in the U-shaped groove at the far end of the first jaw 1a and the second jaw 1b. The first gear 42 and the second gear 40 are respectively accommodated in the bosses at the near end of the first jaw 1a and the second jaw 1b. The first gear 42 and the second gear 40 are exposed on the opposite side of the first jaw 1a and the second jaw 1b. The thickness of the bosses at the near end of the first jaw 1a and the second jaw 1b can be greater than the thickness of the U-shaped groove. The thickness of the U-shaped groove is less than the diameter of the first roller 43 and the second roller 41.

[0067] Figure 11Only one structural configuration of the first jaw 1a and the second jaw 1b is shown. In this configuration, when the first jaw 1a is positioned above the second jaw 1b, the second gear 40 is driven by the shaft 34 within the shaft tube 47. The first gear 42 is driven by the second gear 40. The distal end of the transmission rod 8 is rotatably connected to the proximal end of the first jaw 1a. In this configuration, the first gear 42 is allowed to be coaxially connected with the second roller 41. In another structural configuration, the second jaw 1b is positioned above the first jaw 1a. The first gear 42 is coaxially connected to the shaft 34 within the shaft tube 47 and is directly driven by the shaft 34. The rotation axes of the second roller 41 and the first roller 43 are parallel. The distal end of the transmission rod 8 is rotatably connected to the proximal end of the second jaw 1b. In this configuration, only the rotatable second roller 41 is allowed to be installed within the second jaw 1b, and the second gear 40 is not required.

[0068] Furthermore, in Figure 11 In the illustrated scheme, the first roller 43 includes a first groove portion, and the second roller 41 includes a second groove portion. When the first jaw 1a is in the closed position, the first groove portion faces the second groove portion. When the first jaw 1a is in the closed position, the bent needle 2 is driven between the first groove portion and the second groove portion.

[0069] Furthermore, such as Figure 9 As shown, one end of shaft 34 extending into housing 46 is coaxially fixed with a bevel gear 35, the front cone of which faces the proximal side of housing 46. Housing 46 is also equipped with a bevel gear assembly, such as... Figure 16 As shown, it includes a bevel gear set 33 and a gear 31. The bevel gear set 33 consists of a pair of bevel gears with front cones fixed opposite each other on the same gear shaft 48. The distance between the two bevel gears is greater than the diameter of the bevel gear 35. The gear 31 is coaxially fixed to one end of the gear shaft 48.

[0070] Specifically, the gear shaft 48 is rotatably mounted on one end of the slider 49 located inside the housing 46, and the other end of the slider 49 extends from a window near the side of the housing 46 to the outside of the housing 46. The extension directions of the gear shaft 48 and the window are both perpendicular to the fan-shaped plane between the handle 44 and the shaft tube 47. The slider 49 can move along the window so that only one bevel gear in the bevel gear set 33 meshes with bevel gear 35.

[0071] Furthermore, in order to drive the one-way gear 31 to rotate when the trigger 45 rotates, the ratchet assembly 32 is rotatably configured on the slider 49 to drive the gear 31 to rotate; as Figure 15As shown, the middle part of the trigger 45 facing the lever 6 is configured to connect one end of the arc-shaped rack 30, and the other end of the arc-shaped rack 30 extends into the housing 46. The arc-shaped rack 30 has continuous teeth arranged on the side facing the slider 49. The arc-shaped rack 30 is used to drive the ratchet assembly 32 to rotate in one direction, so that the drive gear 31 rotates synchronously in one direction.

[0072] Specifically, such as Figure 13 and Figure 14 As shown, the ratchet assembly 32 includes a second gear 38, a third gear 36, and a center wheel 50. The third gear 36 is rotatably mounted on a slider 49 inside the housing 46 and meshes with an arc-shaped rack 30. The outer periphery of the second gear 38 meshes with a first gear 31. The inner periphery of the second gear 38 is cut into a saw blade-shaped profile / hole concentric with the outer periphery. The center wheel 50 is concentrically arranged in the saw blade-shaped profile of the second gear 38. One end face of the center wheel 50 is coaxially connected to the third gear 36. At least two pawls 39 are provided on the side circumferential surface of the center wheel 50, which are symmetrical about the central axis of the center wheel 50. One end of the pawl 39 is rotatably connected to the center wheel 50. A spring 37 is arranged between the other end of the pawl 39 and the center wheel 50. One end of the spring 37 is embedded in the center wheel 50, and the other end is in contact with the pawl 39. When the pawl 39 is opened by the spring 37, it is embedded in the toothed groove of the saw blade-shaped profile.

[0073] Therefore, during sewing, when the trigger 45 is pressed by hand, the trigger 45 rotates towards the lever 6, driving the ratchet assembly 32 to rotate via the arc-shaped rack 30. The ratchet assembly 32 then drives the gear 31 to rotate, which in turn drives the bevel gear set 33 to move, causing the bevel gear 35 to rotate. This, in turn, rotates the shaft 34, causing the first jaw 1a to rotate relative to the roller inside the second jaw 1b. The first jaw 1a rotates clockwise relative to the second roller 41 inside the second jaw 1b, causing the sewing needle 2 to rotate clockwise. When the trigger 45 is pulled back to its original position, the first roller 43 and the second roller 41 remain stationary. This cycle repeats, achieving the sewing function. When the switch 4 is activated and the trigger 45 is pressed towards the lever 6, the second roller 41 rotates counterclockwise, causing the sewing needle 2 to rotate counterclockwise, thus retracting the sewing needle 2.

[0074] When gear 36 rotates clockwise, pawl 39, under the action of the saw blade-like contour on the inner circumference of gear 2 38, compresses spring 37 towards the center, thereby causing gear 2 38 to slide relative to the central wheel 50, and gear 2 38 remains stationary. When gear 36 rotates counterclockwise, pawl 39, under the action of spring 37, engages in the saw blade-like contour on the inner circumference of gear 2 38, thereby causing gear 2 38 to rotate together with gear 36. Thus, when the trigger 45 is pressed and rotated towards the lever 6, the shaft 34 rotates, thereby causing the first roller 43 and the second roller 41 at the front end to rotate. When the trigger 45 is pulled back to the initial position towards the shaft tube 47, the shaft 34 does not rotate, and the first roller 43 and the second roller 41 do not rotate.

[0075] The bevel gear set 33 has two bevel gears that can slide along the gear shaft 48 in the window direction. When the switch 4 is flipped downwards, the slider 49 engages the upper bevel gear of the bevel gear set 33 with bevel gear 35. Similarly, when the switch 4 is flipped upwards, the slider 49 engages the lower bevel gear of the bevel gear set 33 with bevel gear 35. Since the two bevel gears on the bevel gear set 33 engage with bevel gear 35, bevel gear 35 rotates in opposite directions, thus switching the rotation direction of the shaft 34 and achieving the forward and reverse rotation of the first roller 43 and the second roller 41. Furthermore, since the two bevel gears on the bevel gear set 33 have the same number of teeth and an even number of teeth, the risk of the bevel gears failing to engage during switching is avoided.

[0076] When shaft 34 rotates, it drives the second gear 40 to rotate, thereby driving the second roller 41 to rotate. As a result, the first gear 42 in the first jaw 1a also rotates synchronously. When the first jaw 1a closes, the first gear 42 on the first roller 43 meshes with the second gear 40, thereby achieving synchronous reverse rotation of the first roller 43 and the second roller 41, thus providing a stronger puncture force to the suture needle.

[0077] The corrugated notches on the first roller 43 and the second roller 41 are staggered and alternately distributed, which can accommodate suture needles 2 with a cross section no larger than the corrugated notch, thereby enabling the adaptation to suture needles of different sizes, reducing the high cost and excessive cumbersome manual operation caused by the traditional instrument being able to adapt to only one type of suture needle.

Claims

1. A roller needle holder suturing device characterized by, It comprises: a housing (46) with a shaft tube (47) and a handle (44) fixed at its distal / proximal end respectively, the handle (44) extending obliquely in the opposite direction of the distal end of the shaft tube (47) on the proximal end extension line of the shaft tube (47); a first jaw (1a) and a second jaw (1b) configured at the distal end of the shaft tube (47) for holding objects therebetween; a transmission rod (8) configured in the shaft tube (47) for axial reciprocating movement, for enabling the first jaw (1a) to rotate relative to the proximal end of the second jaw (1b), the transmission rod (8) being a compressible and resettable elastic telescopic rod; a transmission mechanism and a lever (6) rotating around a fulcrum (9) configured in the housing (46), the lower end of the lever (6) extending out of the housing (46) and into the sector plane between the handle (44) and the shaft tube (47), the transmission mechanism for moving the transmission rod (8) by pushing when the lever (6) rotates around the fulcrum (9) to the position close to or away from the handle (44) respectively, so as to rotate the first jaw (1a) relative to the second jaw (1b) to the closed position or the open position; wherein a clamping recovery mechanism is installed between the handle (44) and the lever (6), the clamping recovery mechanism comprising: a groove (17) configured in the housing (46) and close to the handle (44), the opening end face of the groove (17) being parallel to the sector plane; a positioning rod (15) hinged at one end to the pin shaft (12) on the lever (6) and provided at the other end with a positioning pin (16) ejected by an elastic body (14) and embedded in the groove (17), the pin shaft (12) being provided between the fulcrum (9) and the lower end of the lever (6); the groove (17) comprises at least four segments of groove segment one (20), groove segment two (19), groove segment three (18) and groove segment four (23) connected in sequence, the previous groove segment and the next groove segment being configured as a stepped ladder with deepening depth at the joint, the groove segment one (20) and the groove segment four (23) being connected to each other and their joint ends being towards the pin shaft (12), the joint ends of the groove segment two (19) and the groove segment three (18) being towards the lever (6), each groove segment being deeper at the end closer to the lever (6) than at the end farther away from the lever (6), when the lever (6) and the handle (44) are close to each other, the joint ends of the groove segment one (20) and the groove segment two (19) and the joint ends of the groove segment three (18) and the groove segment four (23) are equal in distance from the pin shaft (12), when the lever (6) and the handle (44) move from the position away from each other to the position close to each other, the positioning pin (16) slides to the joint of the groove segment one (20) and the groove segment two (19), when the lever (6) rotates relative to the handle (44) to the open position of the first jaw (1a) relative to the second jaw (1b), the positioning pin (16) slides to the joint of the groove segment one (20) and the groove segment four (23), the stroke of the groove segment two (19) is not greater than 1 / 3 of the stroke of the groove segment one (20).

2. The roller needle holder of claim 1, wherein, The transmission mechanism comprises a connecting rod (10) arranged in the housing (46), two ends of the connecting rod (10) are rotatably connected with the proximal end of the transmission rod (8) and the upper end of the lever (6) respectively.

3. The roller needle holder of claim 1, wherein, The groove segment one (20) and the groove segment four (23) are communicated through the groove segment five (22), the groove segment five (22) is deeper at the end close to the lever (6) than at the end far from the lever (6), the groove segment four (23), the groove segment five (22), the groove segment one (20) and the groove segment before and after the groove segment are configured as stepped structures with deepening depths at the joint, and the joint of the groove segment five (22) and the groove segment one (20) is the position closest to the lever (6) among all the groove segments.

4. The roller needle holder of claim 1, wherein, The first jaw (1a) is provided with a first roller (43) and a first gear (42) connected concentrically, and the second jaw (1b) is provided with a rotatable second roller (41), the rotation axes of the first roller (43) and the second roller (41) are parallel, when the first jaw (1a) rotates to the closed position relative to the second jaw (1b), the first gear (42) can drive the first roller (43), and the first roller (43) and the second roller (41) can drive the needle therebetween, and the first gear (42) is configured to be driven to rotate by the shaft (34) in the shaft tube (47).

5. The roller needle holder of claim 4, wherein, The first roller (43) comprises a first groove portion, the second roller (41) comprises a second groove portion, when the first jaw (1a) is in the closed position, the first groove portion faces the second groove portion, and when the first jaw (1a) is in the closed position, the needle is driven between the first groove portion and the second groove portion.

6. The roller needle holder of claim 4, wherein, The shaft (34) is coaxially fixed with a bevel gear one (35) towards the proximal end at one end extending into the housing (46), and the housing (46) is further provided with a bevel gear assembly, comprising: A bevel gear set (33) composed of a pair of front bevel gears fixed on the same gear shaft (48) and facing each other; A gear one (31) coaxially fixed at one end of the gear shaft (48); The gear shaft (48) is rotatably mounted at one end of the sliding block (49), and the other end of the sliding block (49) extends out of the housing (46) from the window at the proximal end of the housing (46), the extending direction of the gear shaft (48) and the window are both perpendicular to the fan plane, and the sliding block (49) can move along the window to make only one bevel gear in the bevel gear set (33) mesh with the bevel gear one (35).

7. The roller needle holder of claim 6, wherein, The needle-holding suture device further comprises: A ratchet assembly (32) rotatably arranged on the sliding block (49) for driving the gear one (31) to rotate. A trigger (45) is arranged in the sector plane, one end of the trigger (45) is rotatably connected with the housing (46) and the other end of the trigger (45) is located in the sector region between the lever (6) and the shaft tube (47) away from the housing (46), the middle part of the trigger (45) is configured to connect one end of the arc-shaped rack (30), the other end of the arc-shaped rack (30) extends into the housing (46), the side of the arc-shaped rack (30) facing the slider (49) is provided with continuous teeth, and the arc-shaped rack (30) is used to drive the one-way rotation of the ratchet assembly (32) and the synchronous one-way rotation of the driving gear (31).

8. The roller needle holder of claim 7, wherein, The ratchet assembly (32) comprises a gear two (38), a gear three (36) and a center wheel (50), the gear three (36) is rotatably mounted on the slider (49) in the housing (46) and meshes with the arc-shaped rack (30), the outer periphery of the gear two (38) meshes with the gear one (31), the inner periphery of the gear two (38) is cut into a saw blade-shaped profile / hole concentric with the outer periphery, the center wheel (50) is arranged concentrically in the saw blade-shaped profile of the gear two (38), one end surface of the center wheel (50) is coaxially connected with the gear three (36), the side circumferential surface of the center wheel (50) is provided with at least two pawls (39) which are symmetric to the center axis of the center wheel (50), one end of the pawl (39) is rotatably connected with the center wheel (50), the other end of the pawl (39) is arranged with a spring (37) between the center wheel (50), one end of the spring (37) is embedded in the center wheel (50), the other end of the spring (37) is in contact with the pawl (39), when the pawl (39) is opened by the spring (37), it is embedded in the tooth-shaped groove of the saw blade-shaped profile.

9. The roller needle holder of any one of claims 8, wherein, The distance between the trigger (45) and the end of the handle (44) away from the housing (46) is not greater than the grip distance of the palm.

10. The roller needle holder of any one of claims 1 to 9, wherein, When the lever (6) is relatively away from the handle (44), the distance between the lever (6) and the end of the handle (44) away from the housing (46) is less than the grip distance of the palm.

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