CN218220235U - Auxiliary traction forceps for endoscopic surgery - Google Patents

Abstract

The utility model discloses an auxiliary traction forceps for endoscopic surgery, which comprises a forceps head, a sheath tube and a handle which are connected in sequence; the sheath tube is provided with a bendable section, and a steering wire and a traction wire are accommodated and fixed in the bendable section; one end of the steering wire is connected to a sheath bending control mechanism of the handle, and the sheath bending mechanism is suitable for realizing the bidirectional bending of the bendable segment of the sheath by bidirectionally pulling the steering wire and locking and keeping the bending angle; one end of the traction wire is connected to the tong head opening and closing control mechanism of the handle, the other end of the traction wire is connected to the tong head, and the tong head opening and closing control mechanism is suitable for realizing opening and closing of the tong head and locking and keeping an opening and closing state through bidirectional traction of the traction wire. The utility model discloses can realize confirming and pull the position, the locking pulls the angle, keeps the current position, and the operator needn't be whole manual, has promoted the operation travelling comfort and the degree of accuracy.

Description

Auxiliary traction forceps for endoscopic surgery

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to supplementary pincers that pull of endoscope operation for supplementary tractive mucous membrane tissue of operation under the endoscope.

Background

The dissection of diseased submucosal tissue is the core part of Endoscopic mucosal dissection (ESD) operation, and the exposure of the operative field between the mucosa and the submucosal tissue is the key to the safe and smooth operation. In order to make the ESD operation more smoothly, some methods are used to assist the ESD operation, i.e. to assist the traction technique. The primary purpose is to improve the visual field and increase the visibility of the submucosa, thereby accurately identifying the cutting line, improving the operation efficiency, reducing the operation time and complications and smoothly cutting off the lesion tissues of some difficult parts through ESD.

The existing lesion mucosa auxiliary traction methods aiming at ESD include a percutaneous puncture traction method, a gravity suspension method, a tissue clamp auxiliary traction method, a rubber band traction method, an elastic medical ring method and an S-O clamp traction method. These methods have low requirements on the device, and part of the traction device clinicians can self-control according to the needs of the operation. However, the defects are that the flexibility of controlling the traction direction and the traction force is poor, and part of methods have the risk that the device stays in a human body, so that a surgical instrument with controllable traction direction and capable of accurately grasping the mucosa of the focus is needed.

Chinese patent document CN214017647U discloses a mucous membrane traction device and an endoscopic system, the mucous membrane traction device includes a tube, a first clip and a traction member, the first clip is mounted on a distal end of the tube, the traction member is provided with a first acting portion and a second acting portion, the first acting portion acts on the distal end of the tube, the second acting portion acts on a distal end of the endoscope, when the traction member is pulled, the distal end of the tube and the distal end of the endoscope are close to each other and kept fixed, and when the traction member is released, the distal end of the tube and the distal end of the endoscope can independently move. The endoscopic system comprises the mucosa traction device.

Chinese patent document CN102125459B discloses a mucosa retractor, comprising: an endoscope fixing part capable of being mounted on the distal end head of the endoscope; an instrument lifting part capable of mounting surgical instruments; one end of the swing arm is movably connected with the endoscope fixing part, and the other end of the swing arm is movably connected with the instrument lifting part; the far end of the traction part is connected with the instrument lifting part.

Chinese patent document CN212438762U discloses an ESD surgical traction apparatus, which comprises a guide handle, an upper cover, a guide ball, an outer sleeve, a guide tube and a traction clamp; the outer sleeve, the guide tube and the traction clamp are sequentially connected along the axial direction, the guide ball is fixedly connected with the outer sleeve, and the upper cover is sleeved on the periphery of the guide ball and can rotate along the spherical surface of the guide ball; the guide handle is connected with a push-pull cable, the push-pull cable sequentially penetrates through the upper cover, the guide ball, the outer sleeve and the guide pipe along the axial direction and then is connected with the traction clamp, and the guide handle can reciprocate along the axial direction of the push-pull cable; the upper cover is connected with a plurality of traction wires, and each traction wire crosses the guide ball along the periphery of the guide ball and is connected with the tail end of the guide tube.

CN214017647U can not control the traction angle independently, and only depends on the deflection of the endoscope tip to position the focus; CN102125459B depends on external force to make the lifting sleeve deflect to realize direction control, and can not accurately control the traction angle; although the CN212438762U integrates the bending and opening of the forceps head on one handle, the opening and closing of the forceps head and the locking of the bending state cannot be separately maintained, that is, in the traction process of locating a focus, the traction angle/position cannot be fixed, and the operator needs to manually control the whole process, which is laborious to operate. The bending position of the existing device mostly adopts a snake bone structure, and the snake bone is easy to deform in the original bending state due to the pulling of the internal traction wire during bending, so that the operation of an operator is interfered.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art, improving the follow-up performance of the tissue forceps relative to the endoscope and increasing the locking function of the operation state of the tissue forceps so as to realize the accurate positioning to the focus and carry out the operation under the endoscope quickly and efficiently.

In order to achieve the purpose, the utility model provides an auxiliary traction forceps for endoscopic surgery, which comprises a forceps head, a sheath tube and a handle which are connected in sequence; the sheath tube is provided with a bendable section, and a steering wire and a traction wire are accommodated and fixed in the bendable section; one end of the steering wire is connected to a sheath bending control mechanism of the handle, and the sheath bending mechanism is suitable for realizing the bidirectional bending of the bendable segment of the sheath by bidirectionally pulling the steering wire and locking and keeping the bending angle; one end of the traction wire is connected to the tong head opening and closing control mechanism of the handle, the other end of the traction wire is connected to the tong head, and the tong head opening and closing control mechanism is suitable for opening and closing the tong head through bidirectional traction of the traction wire and locking the tong head to keep an opening and closing state.

Furthermore, the bendable section of the sheath tube is of a multilayer composite structure and sequentially comprises a wrapping tube, an outer snake bone, a steering wire, a snake bone connecting tube and an inner snake bone from outside to inside; the traction wire is accommodated and passes through the inner snake bone; the external snake bone and the internal snake bone are both suitable for bidirectional bending.

Further, the outer snake bone is adapted to bend 270 ° each in both directions.

Further, the inner snake is adapted to make 180 ° bends in both directions.

Furthermore, the axial near ends of the outer snake bone, the inner snake bone and the snake bone connecting pipe are fixedly connected; the inner snake bone is kept in a free moving state at one end close to the forceps head.

Furthermore, the steering wires are axially arranged on two sides of the sheath tube and are suitable for bending the sheath tube to different sides by pulling the steering wires on one side towards the direction close to the forceps head or away from the forceps head.

Further, the sheath bending control mechanism comprises a bending push button assembly and a roller; the bending push button assembly is arranged in the middle of the lower cover of the handle in a sliding mode, and the roller is fixedly arranged at the rear portion of the lower cover; the steering wires extend to the roller after being fixed by the bending push button assembly and are tightly attached to the roller to be wound and then turn back.

Furthermore, the bending push button assembly comprises a second push button seat, a steering wire fixing interface is arranged on the second push button seat, and the steering wire is fixed on the steering wire fixing interface; the second push button seat is arranged on the inner bottom surface of the lower cover in a sliding mode, a second spring is accommodated in the second push button seat, a second clamping block is arranged on the top surface of the second spring, a second screw with an upward head is arranged in the second clamping block, and a second push button is connected to the second screw in a threaded mode.

Further, the turning wires at least comprise an upper turning wire and a lower turning wire which are separated or connected with each other.

Further, when the upper side steering wire and the lower side steering wire are continuous, a first steering wire scaling structure is arranged on the second push button seat, and the first steering wire scaling structure is suitable for adjusting the effective lengths of the upper side steering wire and the lower side steering wire simultaneously.

Furthermore, the first steering wire zooming structure comprises an adjusting channel and an adjusting rod, the adjusting channel is a cavity and extends along the length direction of the lower cover, the adjusting rod penetrates through the cavity wall on one side of the cavity from outside to inside in a direction perpendicular to the extending direction of the adjusting channel and then is mounted on the cavity wall on the other side of the cavity in a bidirectional rotating manner, and a through hole is radially formed in the middle section of the adjusting rod; the adjusting channel is used as a passage for the steering wire to pass through and the effective length of the steering wire to be zoomed, and the steering wire is directly wound on the adjusting rod for a certain number of turns or is wound on the adjusting rod for a certain number of turns after passing through the through hole.

Furthermore, the steering wires sequentially comprise an upper steering wire, an adjusting steering wire and a lower steering wire which are continuous; and the second push button seat is provided with a second steering wire zooming structure, and the second steering wire zooming structure is suitable for respectively and bidirectionally adjusting the effective lengths of the upper steering wire and the lower steering wire by bidirectionally zooming the length of the steering wire.

Furthermore, the steering wire second zooming structure comprises an adjusting channel, a left adjuster and a right adjuster, the adjusting channel is a cavity and extends along the length direction of the lower cover, the left adjuster and the right adjuster respectively penetrate through the cavity wall on one side of the cavity from outside to inside in the direction perpendicular to the extending direction of the adjusting channel and are mounted on the cavity wall on the other side in a bidirectional rotating manner, and through holes are radially formed in the middle sections of the left adjuster and the right adjuster; the adjusting channel is used as a passage for the steering wire to pass through and an effective length scaling channel, and the steering wire is directly and respectively wound around the left adjuster and the right adjuster for a certain number of turns or is respectively wound around the left adjuster and the right adjuster for a certain number of turns after passing through each through hole.

Furthermore, the handle comprises an upper cover, and a plurality of clamping grooves are formed in the inner top surface of the upper cover; the second fixture block is provided with at least one second protrusion, and the second protrusion is suitable for being embedded into the clamping groove to fix the position of the second push button seat.

Furthermore, a sliding groove is formed in the upper cover, and the second push button extends out of the upper cover through the sliding groove and is suitable for moving back and forth along the sliding groove.

Further, a guide groove is formed in the upper cover, and the guide groove is suitable for accommodating and guiding the steering wire.

Furthermore, a guide sleeve is arranged in the guide groove.

Furthermore, the accommodating cavity opening part of the second push button seat is provided with a second limiting part extending inwards.

Furthermore, the tong head opening and closing control mechanism comprises a clamping push button assembly arranged at the front part of the lower cover of the handle, the clamping push button assembly comprises a first push button seat, a traction wire fixing interface is arranged on the first push button seat, and the traction wire is fixed on the traction wire fixing interface; the first button seat that pushes away slides and locates on the interior bottom surface of lower cover, hold first spring in the first button seat that pushes away, be equipped with first fixture block on the top surface of first spring, first fixture block embeds has the first screw of head up, the spiro union has first button that pushes away on the first screw.

Furthermore, the first fixture block is provided with at least one first protrusion, and the first protrusion is suitable for being embedded into a plurality of clamping grooves in the upper cover of the handle so as to fix the position of the first push button seat.

Furthermore, the accommodating cavity opening part of the first push button seat is provided with a first limiting part extending inwards.

Further, the handle includes a stress spreader tube that interfaces with the sheath tube.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the accurate control of the traction angle can be realized, the bidirectional 180-degree bending of the clamp head and the 360-degree torsion of the pipe body are included, and the angle required by the operation is basically covered.

2. The traction position can be determined, the traction angle is locked, the current position is kept, the operator does not need to manually control in the whole process, and the operation comfort and accuracy are improved.

3. A support structure is added at the bending position to coat the traction wire for controlling the opening and closing of the binding clip and bend along with the bending section at the same time, so that support is provided, the bending section is prevented from deforming, and the operation interference is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view (cross section) of a sheath according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a lower cover (including a sheath bending mechanism and a binding clip opening and closing control mechanism) according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a clamping button assembly of the opening and closing control mechanism of the binding clip according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a bending push button assembly of a sheath bending mechanism according to an embodiment of the present invention;

fig. 6 is a schematic structural view of an upper cover according to an embodiment of the present invention;

fig. 7 is a schematic view of a first zoom structure of a steering wire according to an embodiment of the present invention;

fig. 8 is a schematic view of a second zoom structure of a steering wire according to an embodiment of the present invention.

In the figure:

1-a binding clip; 2-sheath tube; 21-wrapping the tube; 22-external snake bone; 221 a-upper side steering wires; 221 b-lower side steering wires; 221 c-adjusting section steering wires; 23-internal snake bone; 24-snake bone connection pipe; 25-an outer sheath; 26-an inner tube; 27-drawing wires; 3-a handle; 31-upper cover; 311-card slot; 312-a guide slot; 313-a chute; 32-lower cover; 33-a clamping push button assembly; 331-a first push button; 332-first push button seat; 3321-first position-limiting part; 333-a first fixture block; 3331-first projection; 334-a first spring; 335-a first screw; 34-bending the push button assembly; 341-second push button; 342-a second push button seat; 3421-a second limiting part; 343-a second fixture block; 3431-second projection; 344-a second spring; 345-a second screw; 346-adjusting rod; 347-left regulator; 348-right adjuster; 35-a roller; 36-a stress diffusion tube; a-a steering wire first interface; b-a steering wire second interface; c-traction wire fixing interface.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is to be described hereinafter with reference to the accompanying drawings. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that all the directional terms as referred to herein, such as upper, lower, left, right, front, middle, rear, bottom, top, inner, outer, etc., refer to the directions as shown in the drawings. This is for convenience of description and is not intended as any limitation on the invention.

As shown in fig. 1-6, an embodiment of the auxiliary traction forceps for endoscopic surgery of the present invention comprises a forceps head 1, a sheath tube 2 and a handle 3 connected in sequence; the sheath 2 has a bendable section in which a steering wire and a traction wire 27 are accommodated and fixed; one end of the steering wire is connected to a sheath bending control mechanism of the handle 3, and the sheath bending mechanism is suitable for realizing bidirectional bending of the bendable segment of the sheath 2 by pulling the steering wire in two directions and locking and keeping a bending angle; one end of the traction wire 27 is connected to the forceps head opening and closing control mechanism of the handle 3, the other end of the traction wire is connected to the forceps head 1, and the forceps head opening and closing control mechanism is suitable for opening and closing the forceps head 1 through bidirectional traction of the traction wire 27 and locking to keep an opening and closing state.

In this embodiment, the bendable portion of the endoscope and the bendable section of the sheath tube 2 of the traction forceps are overlapped and bound together, and as long as the bendable portion of the endoscope performs a bending operation, the bendable section of the sheath tube 2 is inevitably bent, so that the following performance is good, and the operation radius can be effectively reduced. The sheath tube bending control mechanism is arranged in the handle 3 of the traction forceps to control the bending angle and the bending direction of the bendable section of the sheath tube 2, the sheath tube can be bent in a certain direction according to needs and adjusted to a proper bending angle, and the sheath tube bending control mechanism can be locked and kept at the bending angle after being adjusted in place, so that a certain part does not need to be held all the time manually to keep the bending angle, time and labor are saved, and convenience and rapidness are realized; similarly, a tong head opening and closing control mechanism is arranged in the handle 3 of the traction tong to control the opening or closing of the tong head 1, and the opening or closing state can be locked, namely, if the tong head is in the closing state, the tong head is always kept closed, and if the tong head is in the opening state, the opening size is kept unchanged, and the tong head does not need to be maintained manually. The sheath pipe bending control mechanism side of the handle 3 can be provided with a bidirectional bending angle mark, so that the control of the bending angle is more definite.

In one embodiment, the bendable section of the sheath tube 2 is a multilayer composite structure, and comprises a sheath tube 21, an outer snake bone 22, a steering wire, a snake bone connecting tube 24 and an inner snake bone 23 from outside to inside; the traction wire 27 is accommodated and passes through the inner snake bone 23; both the outer snake 22 and the inner snake 23 are adapted to bend in two directions. In this embodiment, the snake adapter 24 is connected at a proximal end to the inner snake 23 and the outer snake 22 and allows the steering wires provided on the outer snake 22 to pass through the gap between the inner snake 23 and the outer snake 22. The outer snake bone 22 and the inner snake bone 23 can be made of stainless steel, nickel-titanium alloy or other metal materials. The traction wire 27 may be sleeved with a friction-reducing tube made of PTFE or other polymer materials. As shown in fig. 2, the sheath 2 further comprises a common section comprising an outer sheath 25 and an inner tube 26. The inner tube 26 is connected with the outer snake bone 22, and the inner tube 26 is in the form of a flexible snake bone or a spring tube and is made of stainless steel, niTi alloy or other metal materials. The outer snake bone 22 is coated with the wrapping tube 21, the inner tube 26 is coated with the outer sheath tube 25, the outer sheath tube 25 is made of high-polymer materials with high lubricating property, and the wrapping tube 21 is made of high-elasticity high-polymer materials. In this embodiment, under the outer snake bone 22 curved state, when operation binding clip 1 was closed, to the direction pulling pull wire 27 of keeping away from binding clip 1, make pull wire 27 hug closely in the inner wall of interior snake bone 23, this moment because the structure (not shown on the figure, belong to prior art) that stops that sets up on the interior snake bone 23 for interior snake bone 23 produces the support to pull wire 27, thereby avoid influencing the curved state of outer snake bone 22, the problem of opening and shutting and the mutual interference of bending angle of binding clip 1 has been solved. The front end of the traction forceps adopts a snake bone structure, and the bidirectional 180-degree bending of the head can be easily realized. The inner snake bone 23 can effectively reduce the deformation or control interference caused by the acting force of the traction wire 27 on the outer snake bone 22 when the forceps head 1 is opened and closed.

In one embodiment, the outer snake 22 is adapted to make 270 ° bends in both directions. In this embodiment, the external snake 22 can be bent in two opposite directions to a maximum of 270 °, and the external snake 22 is directly adjacent to or in contact with the bendable part of the endoscope, and the bending angle is large, which inevitably results in better follow-up of the entire sheath 2.

In one embodiment, the inner snake 23 is adapted to make 180 bends in both directions. In this embodiment, the inner snake 23 can be bent by 180 ° in two opposite directions, so as to be better matched with the outer snake 22, and improve the following performance of the whole sheath 2.

In one embodiment, the axial proximal ends of the external snake bone 22, the internal snake bone 23 and the snake bone connecting tube 24 are fixedly connected; the inner snake bone 23 is kept in a free moving state at one end close to the forceps head 1. In this embodiment, the outer snake bone 22 and the inner snake bone 23 are connected at their proximal ends (the end close to the handle 3, also called the rear end) by a snake bone connecting tube 24, the outer snake bone 22 and the inner snake bone 23 at their distal ends (the end far from the handle 3, also called the front end) are movable relatively, when the outer snake bone 22 is bent under stress, the inner snake bone 23 is driven to bend, because the proximal ends are fixed, the bending angle of the inner snake bone 23 is smaller than that of the outer snake bone 22, the front end of the inner snake bone 23 extends forward relative to the outer snake bone 22, a gap of 5mm or less is left between the inner snake bone 23 and the inner bottom of the forceps head 1, and the gap reserved here is filled by the extending inner snake bone 23 during bending.

In one embodiment, the steering wires are axially arranged on two sides of the sheath tube 2, and are suitable for bending the sheath tube 2 to different sides by pulling the steering wires on one side towards the direction approaching the forceps head 1 or away from the forceps head 1. In this embodiment, the turning wires are a continuous whole and are arranged on both sides of the sheath tube 2, and the sheath tube 2 can be bent to different sides by applying external forces in different directions to the turning wires on one side. It should be noted that only the head end of the turning wire is connected with the front end of the outer snake bone 22, the turning wire passes through the convex holes arranged on the inner wall of the outer snake bone 22, and when the turning wire is pulled, the turning wire slides relative to the outer snake bone 22. In this process, the length of the steering wire in the outer snake 22 is shortened, and the outer snake 22 is bent. It should be noted that the purpose of this bending is to fine-tune the position of the endoscope after it has been bent into place, so that the forceps head 1 can be brought more precisely into close proximity with the tissue to be resected.

In one embodiment, the sheath bend control mechanism includes a bend push button assembly 34 and a roller 35; the bending push button assembly 34 is slidably arranged in the middle of the lower cover 32 of the handle 3, and the roller 35 is fixedly arranged at the rear part of the lower cover 32; the steering wire is fixed by the bending push button assembly 34, extends to the roller 35, and is wound tightly on the roller 35 and then turns back. In this embodiment, the turning wires are guided by the roller 35 to turn back and then are respectively arranged on two sides of the lower cover 32, which exactly correspond to the turning wires respectively arranged on two sides of the sheath tube 2 in the previous embodiment; the steering wire is fixed on the bending push button assembly 34, and the steering wire is necessarily pulled along with the movement of the bending push button assembly 34, as shown in fig. 3, the bending push button assembly 34 can move leftwards and also can move rightwards, the stress directions of the steering wire are different when the moving directions are different, and finally the steering wire in the sheath tube 2 drives the sheath tube 2 to bend towards different sides. The roller 35 connects the steering wire with the second push button 341, so that the synchronism is better, and the steering wire on one side is tightened while the steering wire on the other side is loosened.

In one embodiment, as shown in fig. 3 and 5, the bending push button assembly 34 includes a second push button seat 342, and a steering wire fixing interface is provided on the second push button seat 342, and the steering wire is fixed to the steering wire fixing interface; the second push button seat 342 is slidably disposed on the inner bottom surface of the lower cover 32, a second spring 344 is accommodated in the second push button seat 342, a second clamping block 343 is disposed on the top surface of the second spring 344, a second screw 345 with an upward head is disposed in the second clamping block 343, and a second push button 341 is screwed on the second screw 345. In this embodiment, the second push button seat 342 is provided with two steering wire fixing interfaces; the steering wire enters from the first steering wire interface a and exits from the second steering wire interface b, and is fixed on the second push button seat 342, namely, no relative movement exists between the two. As can be seen from fig. 3, the positions of the first steering wire port a and the second steering wire port b, i.e. the left steering wire position, are significantly higher than the right steering wire, so the left steering wire in fig. 3 is located on the upper side in the sheath tube 2 after being extended, and the right steering wire in fig. 3 is located on the lower side in the sheath tube 2 after being extended. When the second push button 341 is pushed leftwards or rightwards, the second push button seat 342 can slide leftwards or rightwards, so that the steering wire on the left side in fig. 3 is pulled leftwards or rightwards. Specifically, if the second push button 341 is pushed to the left (i.e. toward the direction approaching the binding clip 1, or referred to as forward movement), the steering wire on the left side of fig. 3 is at the second interface b of the steering wire

The right side portion of the sheath tube 2 is pulled leftwards, and the right side steering wire which is wound and folded back by the roller 35 is pulled rightwards, so that the steering wire on the inner lower side of the sheath tube 2 is pulled rightwards, the outer snake bone 22 is pulled rightwards by the lower side steering wire 221b and is bent downwards, and the inner snake bone 23 is deformed and extruded by the outer snake bone 22, and is bent and deformed in the same direction as the outer snake bone 22. On the contrary, if the second push button 341 is pushed rightward (i.e. in a direction away from the bit 1, or referred to as backward movement), the left portion of the left side of the steering wire on the left side of fig. 3 at the first port a of the steering wire is pulled rightward, the upper side of the steering wire inside the sheath tube 2 is pulled rightward, the outer snake bone 22 is pulled rightward by the upper side steering wire 221a and is bent and deformed upward, and the inner snake bone 23 is squeezed by the outer snake bone 22 and is bent and deformed in the same direction as the outer snake bone 22. In this embodiment, the force application direction is changed by winding and folding back the roller 35, so that the bidirectional bending of the sheath tube 2 is skillfully realized, and the bending angle is related to the moving distance of the second push button 341 and can be determined according to actual needs.

In one embodiment, as shown in fig. 3, the steering wires include at least an upper steering wire 221a and a lower steering wire 221b, and the upper steering wire 221a and the lower steering wire 221b are separated or continuous. In this embodiment, as the upper turning wire 221a and the lower turning wire 221b are separated from each other, i.e., disconnected from each other, one end of the upper turning wire 221a is terminated at the first turning wire interface a, and one end of the lower turning wire 221b is terminated at the second turning wire interface b. If the upper steering wire 221a and the lower steering wire 221b are continuous, that is, they are connected together and are an integral body, a cavity is provided between the first steering wire interface a and the second steering wire interface b for the steering wire to pass through, but the steering wire is fixed at two points of the first steering wire interface a and the second steering wire interface b. This design, which is both separable and continuous, allows for increased flexibility in the use of the steering wires, and in particular allows for easy adjustment of the effective length of the upper steering wire 221a and/or the lower steering wire 221b in a continuous state, by which is meant the actual length involved in the bending operation.

In one embodiment, as shown in fig. 7, when there is continuity between the upper steering wire 221a and the lower steering wire 221b, the second push button seat 342 is provided with a first steering wire scaling structure adapted to simultaneously adjust the effective lengths of the upper steering wire 221a and the lower steering wire 221 b. In this embodiment, the effective lengths of the upper steering wire 221a and the lower steering wire 221b can be adjusted simultaneously by the action of the first zooming structure of the steering wires on the second push button seat 342, and the tightness of the whole device is adjusted accordingly, including the state that the forceps head 1 is in the non-bending state: loose or tight.

In one embodiment, as shown in fig. 7 (a) - (c), the first zooming structure of the steering wire comprises an adjusting channel and an adjusting rod 346, the adjusting channel is a cavity and extends along the length direction of the lower cover 32, the adjusting rod 346 penetrates through the cavity wall of one side of the cavity from outside to inside perpendicular to the extending direction of the adjusting channel and is mounted on the cavity wall of the other side of the cavity in a bi-directional rotatable manner, and a through hole is radially opened in the middle section of the adjusting rod 346; the adjusting passage is used as a passage for the steering wire to pass through and for the effective length to zoom, and the steering wire is directly wound around the adjusting rod 346 for a certain number of turns or is wound around the adjusting rod 346 for a certain number of turns after passing through the through hole. In this embodiment, the adjustment rod 346 may be a dumbbell-shaped screw, the head end surface is provided with a horizontal slot, the middle section is slightly narrow, the tail end is provided with a thread which can be matched with the cavity wall at the other side of the cavity, the middle section is provided with a through hole, and the adjustment rod 346 can be inserted into the horizontal slot through a tool to rotate anticlockwise or clockwise. The steering wire may be wound after passing through the through-hole of the adjustment lever 346, or may be directly wound without passing through the through-hole. In the former winding method, when the adjustment lever 346 is rotated, the effective length of the upper steering wire 221a is shortened, the effective length of the lower steering wire 221b is shortened when the adjustment lever is rotated counterclockwise, and the effective length of the adjustment lever is lengthened when the adjustment lever is rotated counterclockwise. In the latter winding mode, when the adjustment lever 346 is rotated clockwise, the effective length of the upper steering wire 221a is shortened and the effective length of the lower steering wire 221b is lengthened, whereas when the adjustment lever 346 is rotated counterclockwise, the opposite is true, i.e., the effective length of the upper steering wire 221a is lengthened and the effective length of the lower steering wire 221b is shortened. The flexibility of use is increased by various scaling adjustment modes, and the scaling adjustment modes can be selected according to actual needs.

In one embodiment, as shown in fig. 8, the steering wires sequentially include an upper steering wire 221a, an adjusting steering wire 221c and a lower steering wire 221b, which are continuous with each other; the second push button seat 342 is provided with a second steering wire retracting structure, and the second steering wire retracting structure is adapted to respectively adjust the effective lengths of the upper steering wire 221a and the lower steering wire 221b in two directions by retracting and expanding the length of the adjusting steering wire 221c in two directions. In this embodiment, the adjusting steering wire 221c is a reserved section between the upper steering wire 221a and the lower steering wire 221b, and is used to adjust the effective length of the two sides thereof, thereby increasing the flexibility of use.

In one embodiment, as shown in fig. 8 (a) - (c), the second zooming structure of the steering wire comprises an adjusting channel, a left adjuster 347 and a right adjuster 348, the adjusting channel is a cavity and extends along the length direction of the lower cover 32, the left adjuster 347 and the right adjuster 348 are respectively installed on the cavity wall of one side of the cavity in a manner of being capable of rotating in two directions after penetrating through the cavity wall of the other side of the cavity from the outside to the inside perpendicular to the extending direction of the adjusting channel, and the middle sections of the left adjuster 347 and the right adjuster 348 are radially provided with through holes; the adjusting passage is used as a passage for the steering wire to pass through and an effective length of the steering wire to be scaled, and the steering wire is directly wound around the left adjuster 347 and the right adjuster 348 by a certain number of turns or is wound around the left adjuster 347 and the right adjuster 348 by a certain number of turns after passing through each through hole. In this embodiment, the entire steering wire is divided into 3 segments by two adjusters, i.e., an upper steering wire 221a, a lower steering wire 221b, which control the bending direction of the binding clip 1, respectively, and an adjusting steering wire 221c, which is located between the two adjusters. The left adjuster 347 can adjust the effective length of the upper steering wire 221a and the right adjuster 348 can adjust the effective length of the lower steering wire 221 b. The adjustment effect of the different winding manners is different as in the above-described embodiment of the first zooming structure. It should be noted that, when the manner of winding after passing through the through hole is adopted, as shown in fig. 8 (b) - (c), the position of the through hole through which the steering wire passes on the adjuster is opened (the axial direction of the through hole is parallel to the axial direction of the adjusting channel) or closed (the axial direction of the through hole is perpendicular to the axial direction of the adjusting channel) relative to the adjusting channel by rotating the transverse groove of the adjuster head, similar to the opening and closing of the valve, the steering wire passing through the through hole can be controlled to be in a locked state (see fig. 8 (c)) or a released state (see fig. 8 (b)). The tightness of the upper steering wire 221a can be adjusted by adjusting the length of the upper steering wire 221a and selecting the adjuster to be in the closed state. By adjusting the length of the lower steering wire 221b and selecting the closed state of the adjuster, the tightness of the lower steering wire 221b can be adjusted. The tightness of the steering wires of the whole system can be adjusted by adjusting the lengths of the upper steering wire 221a and the lower steering wire 221b and selecting the two regulators to be in a closed state. Meanwhile, due to the linkage action of the steering wires and the second push button seat 342, the force for operating and bending the push button assembly 34 is changed, and the bending degree of the associated part is changed.

In one embodiment, as shown in fig. 6, the handle 3 includes an upper cover 31, and a plurality of slots 311 are disposed on an inner top surface of the upper cover 31; the second latching block 343 has at least one second protrusion 3431 thereon, and the second protrusion 3431 is adapted to be inserted into the latching groove 311 to fix the position of the second push button seat 342. In this embodiment, the movement distance of the second push button 341 in the previous embodiment is locked by the cooperation of the second protrusion 3431 and the locking groove 311, that is, the bending angle of the sheath 2 is locked. It should be noted that the plurality of slots 311 are arranged at equal intervals, the size of the interval is related to the adjustment accuracy of the bending angle, and the smaller the interval, the higher the adjustment accuracy. In conjunction with the above embodiment, before pushing the second push button 341, it is necessary to press the top of the second push button, and at this time, the second spring 344 below the second push button is compressed to lower the height of the second push button, so that the second protrusion 3431 thereon is disengaged from the locking slot 311, and thus can move freely. After the second push button 341 is moved to the right position, the hand is released from the top thereof, so that the second push button is lifted up by the elastic force of the second spring 344, and the second protrusion 3431 thereon is inserted into the slot 311 to achieve position locking.

In one embodiment, as shown in fig. 6, a sliding slot 313 is provided on the upper cover 31, and the second push button 341 extends out of the upper cover 31 through the sliding slot 313 and is adapted to move back and forth along the sliding slot 313. In this embodiment, the sliding groove 313 provides a space for the second push button 341 to move left and right, and the movable distance of the second push button 341 can be changed by changing the length of the sliding groove 313, so that the bendable angle of the sheath 2 is set. The length of the slide groove 313 is generally the same as the total arrangement length of the plurality of card slots 311.

In one embodiment, as shown in fig. 6, the upper cover 31 is provided with a guide groove 312, and the guide groove 312 is adapted to receive and guide the steering wire. In this embodiment, the guiding groove 312 limits the position and the moving track of the steering wire, so that the steering wire is prevented from being displaced under a stress state and in a moving process to influence the accuracy of the bending angle control. The outer top surface of the upper cover 31 can be covered with soft rubber, so that foreign matters are prevented from entering to influence the operation.

In one embodiment, a guide sleeve is disposed within the guide slot 312. In this embodiment, the guide sleeve can reduce the frictional resistance of the steering wire. The material of the guide sleeve can adopt a high polymer material with high lubricating property.

In one embodiment, as shown in fig. 5, the receiving cavity of the second push button seat 342 has a second limiting portion 3421 extending inward. In this embodiment, the second limiting portion 3421 can effectively prevent the second locking block 343 from coming off the second push button seat 1342.

In one embodiment, as shown in fig. 3 and 4, the forceps head opening and closing control mechanism includes a clamping button assembly 33 disposed at the front portion of the lower cover 32 of the handle 3, the clamping button assembly 33 includes a first button seat 332, a pull wire fixing interface C is disposed on the first button seat 332, and the pull wire 27 is fixed to the pull wire fixing interface C; the first push button seat 332 is slidably disposed on the inner bottom surface of the lower cover 32, a first spring 334 is accommodated in the first push button seat 332, a first clamping block 333 is disposed on the top surface of the first spring 334, a first screw 335 with an upward head is disposed in the first clamping block 333, and a first push button 331 is screwed on the first screw 335. In this embodiment, the pull wire 27 is fixed to the pull wire attachment interface C, i.e., there is no relative movement therebetween. When the first push button 331 is pushed leftwards or rightwards, the first push button seat 332 can slide leftwards or rightwards, so that the pull wire 27 is pulled leftwards or rightwards. Specifically, when the first push button 331 is pushed to the left (i.e. in a direction approaching the binding clip 1, or referred to as moving forward), the pull wire 27 is pushed to the left, and the binding clip 1 connected to the pull wire 27 is pushed to open. Conversely, when the first push button 331 is pushed to the right (i.e. in a direction away from the binding clip 1, or referred to as moving backwards), the pull wire 27 is pulled to the right, and the binding clip 1 connected to the pull wire 27 is pulled to close. The first push button 331 and the second push button 341 can be operated independently without interference, and can be used in the single-hand operation.

In one embodiment, as shown in fig. 3 and 4, the first latch 333 has at least one first protrusion 3331, and the first protrusion 3331 is adapted to be inserted into a plurality of slots 311 on the upper cover 31 of the handle 3 to fix the position of the first push button seat 332. In this embodiment, the first protrusion 3331 and the locking slot 311 are matched to lock the moving distance of the first push button 331 in the previous embodiment, that is, to lock the open or closed state of the binding clip 1, and to lock the size of the opening when the binding clip is opened, and to lock the closing degree, that is, the size of the remaining opening when the binding clip is closed, which is collectively referred to as the degree of opening. The plurality of pockets 311 are arranged at equal intervals, and the size of the interval is related to the adjustment accuracy of the opening/closing degree of the forceps head 1, and the smaller the interval is, the higher the adjustment accuracy is. In the above embodiment, before the first push button 331 is pushed, the top portion thereof needs to be pressed, and the first spring 334 below the first push button is compressed to lower the height thereof, so that the first projection 3331 thereon is released from the locking slot 311, and thus can move freely. After the first push button 331 is moved to the right position, the hand is released from the top thereof, so that the first push button is lifted up by the elastic force of the first spring 334, and the first protrusion 3331 thereon is inserted into the slot 311 to achieve position locking.

In one embodiment, as shown in fig. 4, the receiving cavity opening of the first push button seat 332 has a first stopper portion 3321 extending inward. In this embodiment, the first position-limiting portion 3321 can effectively prevent the first block 333 from coming out of the first push button seat 332.

In one embodiment, the handle 3 includes a stress diffusion tube 36, and the stress diffusion tube 36 interfaces with the sheath 2. In this embodiment, the stress diffusion tube 36 can disperse the stress between the sheath tube 2 and the handle 3, and effectively prevent the sheath tube 2 from deforming at the connection portion.

In one embodiment, the following process may be specifically performed:

s1, operating the traction forceps 3, pressing the second push button 341 downwards, driving the second clamp block 343 to move downwards by the second screw 345, compressing the second spring 344, disengaging the second protrusion 3431 on the second clamp block 343 downwards from the clamping groove 311 of the upper cover 31, pressing the second push button 341 and pushing towards the forceps head 1, moving the second push button seat 342 forwards, pulling the steering wire connected to the second interface b of the steering wire to move forwards, moving the steering wire downwards in the outer snake bone 22 actually due to the guiding action of the roller 35, pulling and deforming the outer snake bone 22 by the steering wire, bending and deforming the inner snake bone 23, deforming and extruding the outer snake bone 122, and bending and deforming the inner snake bone 23 in the same direction as the outer snake bone 23. When the bending angle is proper, the operator releases the second push button 341, the second spring 344 arranged in the second push button seat 342 rebounds, the second clamping block 343 is pushed back upwards into the clamping groove 311 at the corresponding position, the second clamping block 343 is matched with the clamping groove 331, the bending push button assembly 34 is fixed, the position of the steering wire relative to the outer snake bone 22 is fixed, and the bending angle is locked and kept unchanged.

S2, the second push button 341 is pressed downwards, the second screw 345 drives the second clamping block 343 to move downwards, the second spring 344 is compressed, the second protrusion 3431 on the second clamping block 343 is separated downwards from the clamping groove 311 of the upper cover 31, the second push button 341 is pressed and pushed towards the direction far away from the binding clip 1, the second push button seat 342 moves backwards, the steering wire connected to the first interface a of the steering wire is pulled to move backwards, the steering wire connected to the second interface b of the steering wire moves backwards, the steering wire moves forwards after being guided by the roller 35, the upper steering wire 221a is tightened and the lower steering wire 221b is loosened with respect to the outer snake bone 22, the outer snake bone 22 bends and deforms towards the tightened steering wire, namely upwards, the inner snake bone 23 is deformed and extruded by the outer snake bone 22, and bends and deforms in the same direction as the outer snake bone 22. When the steering wire is bent to a proper angle, an operator releases the second push button 341, the second spring 344 arranged in the second push button seat 342 rebounds, the second clamping block 343 is pushed back upwards into the clamping groove 311 at the corresponding position, the second clamping block 343 is matched with the clamping groove 331, the bending push button assembly 34 is fixed, the position of the steering wire relative to the outer snake bone 22 is further fixed, and the bending angle is locked and kept unchanged.

S3, the first push button 331 is pressed downwards, the first screw 335 drives the first clamping block 333 to move downwards, the first spring 334 is compressed, the first protrusion 3331 on the first clamping block 333 is separated downwards from the clamping groove 311 of the upper cover 31, the first push button 331 is pressed and pushed towards the direction of the binding clip 1, the first push button seat 332 pushes the pull wire 27 to move forwards, and the pull wire 27 pushes the binding clip 1 to open. When the pliers head 1 is opened to a proper position, an operator loosens the first push button 331, the first spring 334 rebounds, the first clamping block 333 is pushed back upwards to the clamping groove 311 at the corresponding position, the first clamping block 333 is matched with the clamping groove 331 to fixedly clamp the push button assembly 33, further the position of the traction wire 27 relative to the pliers head 1 is fixed, and the opening position of the pliers head 1 is locked and kept unchanged, namely the opening size is unchanged.

S4, the first push button 331 is pressed downwards, the first screw 335 drives the first clamping block 333 to move downwards, the first spring 334 is compressed, the first protrusion 3331 on the first clamping block 333 is separated downwards from the clamping groove 311 of the upper cover 31, the first push button 331 is pressed and pushed towards the direction far away from the binding clip 1, the first push button seat 332 pushes the pull wire 27 to move backwards, and the pull wire 27 pulls the binding clip 1 to close. When the pincer head is closed to a proper position, an operator releases the first push button 331, the first spring 334 rebounds, the first clamping block 333 is pushed back upwards to the clamping groove 311 at the corresponding position, the first clamping block 333 is matched with the clamping groove 331 to fixedly clamp the push button assembly 33, further the position of the traction wire 27 relative to the pincer head 1 is fixed, and the closed position of the pincer head 1 is locked and kept unchanged, namely the size of the residual opening is unchanged. Under outer snake bone 22 bending state, when operation binding clip 1 was closed, to keeping away from binding clip direction pulling pull wire 27, can make pull wire 27 hug closely in the inner wall of interior snake bone 23, owing to the structure that stops that sets up on the snake bone 23 this moment for interior snake bone produces the support to pull wire 27, thereby avoids influencing outer snake bone 22's bending state, has solved opening and shutting of binding clip 1 and the problem that bending angle disturbed each other.

And S5, according to the actual requirement of the operation process, continuously repeating two or more steps in the steps S1-S4 to realize the auxiliary traction function of the endoscopic operation.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (22)

1. An auxiliary traction forceps for endoscopic surgery is characterized by comprising a forceps head, a sheath tube and a handle which are connected in sequence; the sheath tube is provided with a bendable section, and a steering wire and a traction wire are accommodated and fixed in the bendable section; one end of the steering wire is connected to a sheath bending control mechanism of the handle, and the sheath bending mechanism is suitable for realizing the bidirectional bending of the bendable segment of the sheath by bidirectionally pulling the steering wire and locking and keeping the bending angle; one end of the traction wire is connected to the tong head opening and closing control mechanism of the handle, the other end of the traction wire is connected to the tong head, and the tong head opening and closing control mechanism is suitable for opening and closing the tong head through bidirectional traction of the traction wire and locking the tong head to keep an opening and closing state.

2. The auxiliary traction forceps for endoscopic surgery as defined in claim 1, wherein the bendable section of the sheath tube is a multi-layer composite structure comprising, from outside to inside, a sheath tube, an outer snake bone, a steering wire, a snake bone connecting tube and an inner snake bone; the traction wire is accommodated and passes through the inner snake bone; the external snake bone and the internal snake bone are both suitable for bidirectional bending.

3. The endoscopic surgery auxiliary traction forceps according to claim 2, wherein the outer snake is adapted for two-way 270 ° bends.

4. The endoscopic surgery auxiliary traction forceps according to claim 2, wherein the inner snake is adapted for two-way 180 ° bends.

5. The endoscopic surgery auxiliary traction forceps as defined in claim 2, wherein the axial proximal ends of the outer snake bone, the inner snake bone and the snake bone connecting tube are fixedly connected; the inner snake bone is kept in a free moving state at one end close to the forceps head.

6. The endoscopic surgery auxiliary traction forceps according to claim 2, wherein the steering wires are axially arranged on both sides of the sheath tube and adapted to bend the sheath tube to different sides by pulling the steering wire on one side toward or away from the forceps head.

7. The endoscopic surgery assisted distraction forceps of claim 2, wherein the sheath bending control mechanism comprises a bending push button assembly and a roller; the bending push button assembly is arranged in the middle of the lower cover of the handle in a sliding mode, and the roller is fixedly arranged at the rear portion of the lower cover; the steering wires extend to the roller after being fixed by the bending push button assembly and are tightly attached to the roller to be wound and then turn back.

8. The endoscopic surgery assisted distraction forceps of claim 7, wherein the bending push button assembly comprises a second push button seat, a steering wire fixing interface is provided on the second push button seat, and the steering wire is fixed to the steering wire fixing interface; the second pushes away the button seat and slides and locates on the interior bottom surface of lower cover, the second pushes away and holds the second spring in the button seat, be equipped with the second fixture block on the top surface of second spring, the second fixture block embeds has the second screw of head up, the spiro union has the second to push away the button on the second screw.

9. The endoscopic surgery auxiliary traction forceps according to claim 8, wherein the steering wires include at least an upper steering wire and a lower steering wire, and the upper steering wire and the lower steering wire are separated or continuous.

10. The endoscopic surgery auxiliary traction forceps according to claim 9, wherein when there is continuity between the upper steering wire and the lower steering wire, the second push button seat is provided with a first steering wire contracting and enlarging structure adapted to adjust the effective lengths of the upper steering wire and the lower steering wire simultaneously.

11. The endoscopic surgery auxiliary traction forceps according to claim 10, wherein the first steering wire zooming structure comprises an adjusting channel and an adjusting rod, the adjusting channel is a cavity and extends along the length direction of the lower cover, the adjusting rod penetrates through the cavity wall on one side of the cavity from outside to inside perpendicular to the extending direction of the adjusting channel and is mounted on the cavity wall on the other side in a bi-directional rotatable manner, and a through hole is radially formed in the middle section of the adjusting rod; the adjusting channel is used as a passage for the steering wire to pass through and an effective length scaling channel, and the steering wire is directly wound on the adjusting rod for a certain number of turns or is wound on the adjusting rod for a certain number of turns after passing through the through hole.

12. The endoscopic surgery auxiliary traction forceps according to claim 9, wherein the steering wires sequentially comprise an upper steering wire, an adjusting steering wire and a lower steering wire, which are continuous; and the second push button seat is provided with a second steering wire zooming structure, and the second steering wire zooming structure is suitable for respectively and bidirectionally adjusting the effective lengths of the upper steering wire and the lower steering wire by bidirectionally zooming the length of the steering wire.

13. The endoscopic surgery auxiliary traction forceps according to claim 12, wherein the steering wire second contracting and expanding structure comprises an adjusting channel, a left adjuster and a right adjuster, the adjusting channel is a cavity and extends along the length direction of the lower cover, the left adjuster and the right adjuster are respectively installed on the cavity wall of one side of the cavity in a bidirectional rotation manner after penetrating through the cavity wall of the other side of the cavity from outside to inside in a direction perpendicular to the extending direction of the adjusting channel, and the middle sections of the left adjuster and the right adjuster are radially provided with through holes; the adjusting channel is used as a passage for the steering wire to pass through and an effective length scaling channel, and the steering wire is directly and respectively wound around the left adjuster and the right adjuster for a certain number of turns or is respectively wound around the left adjuster and the right adjuster for a certain number of turns after passing through each through hole.

14. The endoscopic surgery auxiliary traction forceps according to claim 8, wherein the handle comprises an upper cover, and a plurality of clamping grooves are arranged on the inner top surface of the upper cover; the second fixture block is provided with at least one second protrusion, and the second protrusion is suitable for being embedded into the clamping groove to fix the position of the second push button seat.

15. The endoscopic surgery auxiliary traction forceps according to claim 14, wherein the upper cover is provided with a slide groove, and the second push button extends out of the upper cover through the slide groove and is adapted to move back and forth along the slide groove.

16. The endoscopic surgery auxiliary traction forceps according to claim 14, wherein the upper cover is provided with a guide slot adapted to receive and guide the steering wire.

17. The endoscopic surgery auxiliary traction forceps according to claim 16, wherein a guide cannula is provided in the guide channel.

18. The endoscopic surgery auxiliary traction forceps according to claim 8, wherein the receiving cavity mouth of the second push button seat has a second limiting portion extending inward.

19. The endoscopic surgery auxiliary traction forceps according to claim 2, wherein the forceps head opening and closing control mechanism comprises a clamping push button assembly arranged at the front part of the lower cover of the handle, the clamping push button assembly comprises a first push button seat, a traction wire fixing interface is arranged on the first push button seat, and the traction wire is fixed on the traction wire fixing interface; the first button seat that pushes away slides and locates on the interior bottom surface of lower cover, hold first spring in the first button seat that pushes away, be equipped with first fixture block on the top surface of first spring, first fixture block embeds has the first screw of head up, the spiro union has first button that pushes away on the first screw.

20. The endoscopic surgery aided traction forceps according to claim 19, wherein the first fixture block is provided with at least one first protrusion, and the first protrusion is adapted to be inserted into a plurality of slots on the upper cover of the handle so as to fix the position of the first push button seat.

21. The endoscopic surgery assisted distraction forceps of claim 19, wherein the receiving cavity mouth of the first push button holder has a first stop portion extending inwardly.

22. The endoscopic surgery auxiliary traction forceps according to claim 1, wherein the handle includes a stress diffusion tube that interfaces with the sheath.

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