CN213993642U - Jaw assembly steering driving device - Google Patents

Abstract

The utility model discloses a jaw assembly steering driving device, which comprises a joint knob, a lead screw, a lifting slider, a limit chute and a stirring piece, wherein the joint knob is arranged on a handle, the lead screw is coaxially connected with the joint knob, the lead screw is perpendicular to the common plane of a first steering connecting rod and a second steering connecting rod and extends into the handle between the first steering connecting rod and the second steering connecting rod, the lifting slider which can linearly move along the lead screw is arranged in the handle, a protruding part which is embedded with the inner wall of the handle is arranged on the lifting slider, so that the lifting slider is prevented from rotating along with the lead screw, the first steering connecting rod and the second steering connecting rod are slidably connected with the limit chute in a shaft tube or the handle, the shifting piece is arranged on the lifting slide block and can push the steering connecting rod I and the steering connecting rod II to move in opposite directions parallel to the axial direction of the driving rod along with the displacement of the lifting slide block. The utility model discloses a keep silent the subassembly after deflecting because of being blockked by the suture change deflection angle, can the auto-lock.

Description

Jaw assembly steering driving device

Technical Field

The invention relates to the field of medical instruments, in particular to a jaw assembly steering driving device.

Background

Suturing is usually required in surgical operations, and suturing devices for suturing operations are available on the market, such as the existing suturing device shown in fig. 1a and 1B, the jaw is rotated, aknob 14 is required to drive adisk 120 to rotate, whenspiral cam grooves 122A and 122B with an angular component and a radial component on thedisk 120 rotate around a shaft, drivingrods 27A and 27B alternately move linearly, and astopper 125 is further arranged in the spiral cam grooves to position the position of the rod, so that the jaws are prevented from swinging accidentally. Therefore, thedisc 120 requires high machining accuracy, and when machining errors are large, it is difficult to open the jaws at a proper angle when the disc is rotated.

Disclosure of Invention

The utility model discloses aim at providing a subassembly of keeping silent and turn to drive arrangement for sewing up the ware, simple structure does not need precision finishing, enables to keep silent and opens 45 ~ 60 degrees.

The technical scheme of the utility model is that: a jaw assembly steering driving device is characterized in that a jaw assembly is mounted at the far end of a shaft tube, the near end of the shaft tube is connected with a handle, the jaw assembly comprises an upper joint and a lower joint which are symmetrically mounted at the periphery of a rotary bearing, the upper joint and the lower joint are respectively hinged with a pair of connecting rods at the far end of the shaft tube, the connecting rods are symmetrically arranged by taking the axis of the shaft tube as an axis and extend parallel to the axis, a first steering connecting rod and a second steering connecting rod are arranged in the shaft tube along the axis direction, the far ends of the first steering connecting rod and the second steering connecting rod are rotatably connected with the two sides of the jaw assembly, a rotatable joint knob is mounted on the handle, a screw rod is coaxially connected with the joint knob, the screw rod is perpendicular to the plane shared by the first steering connecting rod and the second steering connecting rod and extends into the handle between the first steering connecting rod and the second steering connecting rod, and a lifting slide block capable of linearly moving along the screw rod is mounted in the handle, the lifting slide block is provided with a protruding part which is embedded with the inner wall of the handle, so that the lifting slide block is prevented from rotating along with the screw rod, the first steering connecting rod and the second steering connecting rod are in sliding connection with the limiting sliding groove in the shaft tube or the handle and limited by the limiting sliding groove and can only move along the axial direction of the shaft tube, and the stirring part is arranged on the lifting slide block and can push the first steering connecting rod and the second steering connecting rod to move in opposite directions along with the displacement of the lifting slide block and in parallel with the axial direction of the shaft tube.

Preferably, the poking part is a first oscillating rod and a second oscillating rod which are hinged with the lifting slider, the other ends of the first oscillating rod and the second oscillating rod are respectively hinged with a first steering connecting rod and a second steering connecting rod on the far end side and the near end side of the lifting slider, the length of the second steering connecting rod is larger than that of the first steering connecting rod, when one ends of the first oscillating rod and the second oscillating rod, which are far away from the lifting slider, are close to each other, the jaw assembly rotates towards one side of the first steering connecting rod, and when one ends of the first oscillating rod and the second oscillating rod, which are far away from the lifting slider, are far away from each other, the jaw assembly rotates towards one side of the second steering connecting rod.

Furthermore, the sliding near end and the sliding far end of the limiting sliding groove are provided with limiting blocks which prevent the first swing rod and the second swing rod from rotating to be perpendicular to the joint knob.

Preferably, the poking piece is a chute I and a chute II which are arranged on two sides of the lifting slide block and face the steering connecting rod I and the steering connecting rod II respectively, two sides of the lifting slide block are parallel to the steering connecting rod I, the steering connecting rod II and the screw rod simultaneously, the chute I and the chute II are inclined relative to a plane shared by the steering connecting rod I and the steering connecting rod II and have opposite inclination angles, the chute I and the chute II are equal in length, one ends of the chute I and the chute II, which are close to the joint knob, are equal in height, the steering connecting rod I and the steering connecting rod II are equal in length, and the near ends of the steering connecting rod I and the steering connecting rod II are connected with the chute I and the chute II in a sliding mode respectively.

According to the utility model discloses a structural design, lifting slide and lead screw thread fit have self-locking structure, consequently, when stirring joint knob and rotate, make turn to connecting rod one, turn to two alternative linear motion of connecting rod, make the subassembly of keeping silent and deflect towards one side that turns to connecting rod one, or turn to connecting rod two, and just not change the angle of deflection because of blockking by the suture after deflecting, can reach the same function of subassembly among the background art, simple structure to need not precision finishing. And the steering drive device is easy to assemble.

Description of the drawings:

FIGS. 1a and 1b are schematic views of a jaw turning driving device of a prior art laparoscopic stapler apparatus;

FIG. 2 is a schematic structural view of a laparoscopic stapler apparatus;

FIG. 3 is a schematic view of an assembled jaw assembly of the laparoscopic stapler device;

FIG. 4 is an exploded view of a jaw assembly of the laparoscopic stapler device;

FIG. 5 is a schematic view of the internal structure of the handle of the laparoscopic stapler device of the present invention;

FIG. 6 is an enlarged fragmentary view of the jaw assembly steering drive of FIG. 5;

FIG. 7 is an enlarged partial view of another embodiment of a jaw assembly steering drive.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in detail below with reference to the accompanying drawings by way of examples.

The near end of the utility model is the end close to the operator, and the far end is the end far away from the operator.

As shown in fig. 2-4, the laparoscopic suturing device includes ahandle 1, ashaft tube 2 extending along thehandle 1, and ajaw assembly 3 at a distal end of the shaft tube. Thehandle 1 is a pistol grip, although the handle may take many forms, including scissor grips, syringe grips, endoscopic knobs, and the like, as are known in the art. Thehandle 1 is provided with atrigger 4, anarticulation knob 5, anaxial knob 6 and a flushing port 7 for facilitating cleaning. A pair of axially extending connectingrods 26 are arranged on the periphery of the far end of theshaft tube 2, the pair of connectingrods 26 are symmetrically arranged by taking the axis of theshaft tube 2 as an axis, adriving rod 21, a firststeering connecting rod 22A and a secondsteering connecting rod 22B are arranged in theshaft tube 2 along the axis direction, thedriving rod 21 comprises a near-endrigid part 23 and a far-endbendable part 24 which are fixedly connected together, the near-endrigid part 23 of thedriving rod 21 passes through anaxial knob 6 to be operated by atrigger 4, theaxial knob 6 and therigid part 23 are respectively provided with a polygonal hole and a polygonal contour which are matched with each other, therigid part 23 can pass through the polygonal hole of theaxial knob 6 to translate, therigid part 23 can also rotate along with theaxial knob 6, the far-endbendable part 24 is detachably connected with arack 40 extending into thejaw assembly 3, and the near ends of the firststeering connecting rods 22A and the secondsteering connecting rods 22B are driven by ajoint knob 5, the distal end is rotatably connected to thejaw assembly 3. A slotted hole is formed in the middle of therack 40, a rack along the longitudinal direction of thedriving rod 21 is arranged on one side of the slotted hole, agear 42 is limited in the slotted hole by apin 42 and is meshed with the rack, and aknob 43 is installed on one side of thegear 42, which faces away from the slotted hole.

Referring to fig. 3-4, thejaw assembly 3 includes anupper knuckle 31, alower knuckle 32, a swivel bearing 30, an upper jaw 33, alower jaw 34, theswivel bearing 30 is fixed to a proximal end of thelower jaw 34, the upper jaw 33 is rotatably connected to thelower jaw 34 by apin 35, thepin 35 is received in a hole 44 of the upper jaw 33 and thelower jaw 34, therack 40 is accommodated in the space between the opposite sides of the distal ends of the upper jaw 33 and thelower jaw 34, theknob 43 faces the upper jaw 33, theupper knuckle joint 31 and thelower knuckle joint 32 are connected by a fastener and are sleeved on the periphery of the rotary bearing 30, so that the upper jaw 33, thelower jaw 34, therack 40 and thegear 42 rotate around the axis of theshaft tube 2 between theupper knuckle joint 31 and thelower knuckle joint 32 along with therotary bearing 30, and the distal ends of thefirst steering link 22A and thesecond steering link 22B are respectively connected with the two sides of thelower knuckle joint 32 through two pins in a rotating manner. Theupper knuckle joint 31 and thelower knuckle joint 32 are respectively hinged with a pair of connectingrods 26 at the distal end of theshaft tube 2.

When thesteering connecting rods 22A and 22B are alternately pushed and pulled, thejaw assembly 3 can be articulated leftwards and rightwards relative to theshaft tube 2, and when theaxial knob 6 is rotated, the upper jaw 33 and thelower jaw 34 can be rotated around the axis along with thedriving rod 21.

Abutton 36 and aspring 37 are received in the space between the proximal ends of the upper jaw 33 and thelower jaw 34 and theupper joint 31, thebutton 36 being provided on either side with asymmetrical pin 391, thepin 391 being received in ahole 45 in thelower jaw 34 such that thebutton 36 can rotate about thepin 391 within thelower jaw 34 to compress thespring 37, thespring 37 being disposed between thebutton 36 and the distal end of theupper joint 31,followers 39 being symmetrically disposed on either side of thebutton 36, thefollowers 39 being received incam slots 38 and 46 of the upper jaw and the lower jaw, pivoting thebutton 36 proximally opens the upper jaw 33 and thelower jaw 34 and pivoting thebutton 36 distally closes the upper jaw 33 and thelower jaw 34, thespring 37 exerting a biasing force on thebutton 36 that pivots distally,

fig. 5 shows an embodiment of the actuation of thehandle 1. Thetrigger 4 pivots about apin 10 between an open position and a closed position, aspring 11 pulls thetrigger 4 to hold it in the open position, a connectingrod 13 connected at one end to thetrigger 4 and at the other end to the proximal end of aslide 14, theslide 14 being able to slide on adrive rod 21 upon actuation of thetrigger 4, aspring 15 being provided within theslide 4, thespring 15 being arranged in compression about thedrive rod 21.

Fig. 6-7 show two alternative pushing and pulling motions of thefirst steering link 22A and thesecond steering link 22B, respectively, each of which includes ajoint knob 5, alead screw 54, alifting slider 51, alimit sliding slot 55, and a toggle member, wherein thejoint knob 5 is mounted on thehandle 1, thelead screw 54 is coaxially connected with thejoint knob 5, thelead screw 54 extends into thehandle 1 between thefirst steering link 22A and thesecond steering link 22B perpendicular to a plane formed by thefirst steering link 22A and thesecond steering link 22B, thelifting slider 51 capable of moving linearly along thelead screw 54 is mounted in thehandle 1, thelifting slider 51 is provided with aprotrusion 58 engaged with an inner wall of thehandle 1, so that thelifting slider 51 is prevented from rotating along with thelead screw 54, thefirst steering link 22A and thesecond steering link 22B are slidably connected with thelimit sliding slot 55 in theshaft tube 2 or the handle 1 (thelimit sliding slot 55 slidably connected with thefirst steering link 22A is not shown in fig. 6 and 7, but in practice, it is not difficult to imagine) and limited by thelimit chute 55 to move only along the axial direction of thedriving rod 21, the toggle piece is arranged on thelifting slider 51 and can push thefirst steering link 22A and thesecond steering link 22B to move in opposite directions parallel to the axial direction of thedriving rod 21 along with the displacement of thelifting slider 51.

As an embodiment, as shown in fig. 6, the toggle member is afirst swing link 52 and asecond swing link 53 hinged to thelifting slider 51, the other ends of thefirst swing link 52 and thesecond swing link 53 are hinged to thefirst steering link 22A and thesecond steering link 22B at the distal end side and the proximal end side of thelifting slider 51, respectively, the length of thesecond steering link 22B is greater than that of thefirst steering link 22A, when the ends of thefirst swing link 52 and thesecond swing link 53 far away from thelifting slider 51 are close to each other, thejaw assembly 3 rotates toward one side of thefirst steering link 22A, and when the ends of thefirst swing link 52 and thesecond swing link 53 far away from thelifting slider 51 are far away from each other, thejaw assembly 3 rotates toward one side of thesecond steering link 22B. The proximal end and the distal end of thelimiting chute slide 55 are provided with limiting blocks (the limiting blocks are shielded in fig. 6), and thefirst swing rod 52 and thesecond swing rod 53 are prevented from rotating to be perpendicular to thejoint knob 5.

As another embodiment, as shown in fig. 7, the toggle element is a firstinclined groove 52 and a secondinclined groove 53 which are respectively arranged at two sides of thelifting slider 51 and face thefirst steering link 22A and thesecond steering link 22B, the two sides of thelifting slider 51 are simultaneously parallel to thefirst steering link 22A, thesecond steering link 22B and thescrew 54, the firstinclined groove 52 and the secondinclined groove 53 are inclined and have opposite inclination angles with respect to a plane shared by thefirst steering link 22A and thesecond steering link 22B, the firstinclined groove 52 and the secondinclined groove 53 are equal in length, the firstinclined groove 52 and the secondinclined groove 53 are arranged at the same height at one end close to theknuckle knob 5, thefirst steering link 22A and thesecond steering link 22B are equal in length, the proximal ends of thefirst steering link 22A and thesecond steering link 22B are respectively slidably connected with the firstinclined groove 52 and the secondinclined groove 53, as shown in fig. 7, when thelifting slider 51 is lifted, the proximal ends of thefirst steering link 22A and thesecond steering link 22A are slidably connected with the firstinclined groove 52, The secondinclined slot 53 pushes thedriving rod 21 to move in the opposite direction in parallel with the axial direction.

Claims (4)

1. A jaw assembly steering driving device is characterized in that the upper joint and the lower joint are respectively hinged with a pair of connecting rods at the far end of a shaft tube, the connecting rods are symmetrically arranged by taking the axis of the shaft tube as the axis and extend parallel to the axis, a first steering connecting rod and a second steering connecting rod are arranged in the shaft tube along the axis direction, the far ends of the first steering connecting rod and the second steering connecting rod are rotatably connected with two sides of the jaw assembly, a rotatable joint knob is arranged on a handle, a screw rod is coaxially connected with the joint knob, and the screw rod extends into the handle between the first steering connecting rod and the second steering connecting rod in a way of being vertical to the common plane of the first steering connecting rod and the second steering connecting rod, the handle is internally provided with a lifting slide block which can linearly move along the screw rod, the lifting slide block is provided with a protruding part which is embedded with the inner wall of the handle, so that the lifting slide block is prevented from rotating along with the screw rod, the steering connecting rod I and the steering connecting rod II are slidably connected with the limiting sliding groove in the shaft tube or the handle and limited by the limiting sliding groove and can only move along the axial direction of the shaft tube, and the stirring part is arranged on the lifting slide block and can push the steering connecting rod I and the steering connecting rod II to move towards opposite directions along with the displacement of the lifting slide block and in parallel with the axial direction of the shaft tube.

2. The jaw assembly steering driving device according to claim 1, wherein the toggle member is a first swing rod and a second swing rod hinged to the lifting slider, the other ends of the first swing rod and the second swing rod are respectively hinged to a first steering connecting rod and a second steering connecting rod at the far end side and the near end side of the lifting slider, the length of the second steering connecting rod is larger than that of the first steering connecting rod, when the ends of the first swing rod and the second swing rod, which are far away from the lifting slider, are close to each other, the jaw assembly rotates towards one side of the first steering connecting rod, and when the ends of the first swing rod and the second swing rod, which are far away from the lifting slider, are far away from each other, the jaw assembly rotates towards one side of the second steering connecting rod.

3. The jaw assembly steering drive of claim 2, wherein the proximal and distal ends of the limiting runner are provided with limiting blocks that prevent the first and second swing links from rotating perpendicular to the articulation knob.

4. The jaw assembly steering drive of claim 1, wherein the toggle member is a first angled slot and a second angled slot disposed on two sides of the lifting slider and facing the first steering link and the second steering link, respectively, wherein two sides of the lifting slider are parallel to the first steering link, the second steering link, and the lead screw, the first angled slot and the second angled slot are inclined and have opposite angles with respect to a common plane of the first steering link and the second steering link, the first angled slot and the second angled slot are of equal length, the first angled slot and the second angled slot are disposed at equal height at an end of the first steering link and the second steering link, the first steering link and the second steering link are of equal length, and proximal ends of the first steering link and the second steering link are slidably connected to the first angled slot and the second angled slot, respectively.

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