CN108903986A - A kind of hepatobiliary surgery pulling device facilitating adjustment openings of sizes - Google Patents

Abstract

The invention discloses a traction device for hepatobiliary surgery which can conveniently adjust the size of the opening, which comprises a fixing device, a traction assembly and a cover ring assembly. The cover ring assembly includes a surgical cover and a fixed ring. It is detachably connected to the opening. The fixing ring is used to support the opening of the surgical drapes. There are several hooks on the lower surface of the fixing ring. The hooks are connected to the surgical drapes. By setting the hooks as a retractable structure, it is convenient The fixing ring and the surgical drapes are disassembled and installed, the traction assembly is slidingly connected with the fixing device and the fixing ring, the fixing device includes a support frame and a telescopic rod, the support frame is fixedly connected with the operating table, and when the size of the surgical opening needs to be adjusted, the telescopic rod can be lifted and lowered Drive the traction assembly up and down. When the telescopic rod drives one end of the connecting arm to rise, because the middle section of the connecting arm is supported on the fixed ring, the gripper pulls the tissue around the surgical incision outward and downward to realize fine-tuning of the size of the surgical incision.

Description

A traction device for hepatobiliary surgery that facilitates the adjustment of the size of the opening

technical field

The invention relates to the field of medical equipment, in particular to a traction device for hepatobiliary surgery that facilitates the adjustment of the size of the opening.

Background technique

Hepatobiliary surgery mainly treats diseases such as hepatobiliary and pancreatic tumors, cholelithiasis, and portal hypertension. In current clinical treatment, when liver tumors, liver cysts, gallbladder stones, and tumors are resected under laparoscopy, it is often necessary to use surgical instruments to lift the liver tissue, or to separate and pull the lesion and surrounding tissues. In this process, a retractor device is required. In order not to affect the doctor's vision during the operation, the traditional retractor device uses multiple retractors to pull the surgical incision outward in different directions. The surgical incision is hooked to make it expand outward. The existing retractors are generally fixed on the operating bed with nuts when in use. It is very good to adjust the surgical field of view while taking into account the tightness of the connection. When the tension degree of the surgical opening needs to be adjusted, the retractor needs to be repositioned. Avoid the occurrence of the above situation and increase the safety of operation.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a traction device for hepatobiliary surgery that facilitates the adjustment of the size of the opening. Safety in hepatobiliary surgery.

In order to achieve the above object, the present invention provides the following technical solutions: a traction device for hepatobiliary surgery that facilitates the adjustment of the size of the opening, including a fixing device, a traction assembly, and a shroud assembly, and the shroud assembly includes a surgical drapes and a fixing ring. The cover is provided with an opening, and the fixing ring is detachably connected to the opening. The fixing ring is used to support the opening of the surgical cover, and the fixing ring is fixedly connected with the fixing device.

There are several hooks on the lower surface of the fixed ring, and the hooks are bent toward the outer side of the fixed ring. The cover cloth is provided with several connecting holes at the opening, and the hooks are hooked into the connecting holes to fix the cover cloth. There is a toggle in the fixed ring. There is a linkage plate in the toggle cavity, and the fixed ring is provided with a sliding groove for the hook to expand and contract. The sliding groove is connected with the toggle cavity, and several hooks extend into the toggle cavity through the slide groove and are fixed on the linkage plate. On the top, the linkage plate drives the hook into and out of the connecting hole,

The linkage plate is provided with a paddle, and the inner ring surface of the fixed ring is provided with a toggle groove, the toggle groove and the toggle cavity are connected to each other, and the pick piece extends out of the toggle groove.

The end of the linkage plate facing away from the toggle groove is hinged to the inner wall of the toggle cavity, and the end of the linkage plate away from the hinge point is a conflicting part. The upper and lower ends of the conflicting part are respectively provided with a first slope and a second slope. Clamping, the conflicting part is in the shape of a pointed head, and an adjusting block is set in the toggle cavity, which is set at the end away from the hinge point of the linkage plate. The adjusting block is used to limit the rotation of the linkage plate. The adjusting block is provided with a first conflict surface, The second collision surface and the arc-shaped sliding surface, the first collision surface is used to fit and interfere with the first slope, the second collision surface is used to fit and interfere with the second slope, and the arc-shaped sliding surface is connected to the first collision surface and the second conflicting surface, the arc-shaped sliding surface is used for the sliding of the linkage plate, and the adjustment block is provided with at least two third spring pieces, and the at least two third spring pieces are respectively distributed in the toggle direction of the linkage plate , the third spring member keeps the adjustment block elastically connected to the inner wall of the toggle cavity, and the third spring member keeps the adjustment block to limit the linkage plate to rotate,

The traction component is slidingly connected with the fixing device. The fixing device includes a support frame and a telescopic rod. The support frame is fixedly connected with the operating table. The telescopic rod drives the traction component up and down. There is a support groove, one end of the connecting arm is slidingly connected with the telescopic rod, the middle section of the connecting arm is slidingly connected with the supporting groove, and the gripper extends into the fixing ring.

The telescopic rod includes a base and a sliding rod, the base is provided with a receiving groove, the sliding rod is slidably connected with the receiving groove, the upper end of the sliding rod is provided with a sliding seat, the connecting arm is slidably connected with the sliding seat, and a buckle There are buckle slots on the base, and the buckle joints and the buckle slots are connected with each other.

The base is provided with a first locking assembly, and the first locking assembly is used to control the height of the sliding rod.

As a further improvement of the present invention, the connecting arm is provided with a second through groove, the fastening piece includes a mounting rod and a flange, the mounting rod is slidably connected to the second through groove, the flange is engaged with the buckle groove, and the telescopic rod is connected to the connecting arm. A connecting plate is extended on one side, and the connecting plate is used for receiving the flange.

As a further improvement of the present invention, the first locking assembly includes a limit plate and a latch, the arm in the receiving groove is provided with a first axial installation groove, and the first installation groove is provided with a first spring member, and the limit plate passes through the first The spring part is elastically connected with the first installation groove, there is a bounce gap between the limiting plate and the first installation groove, and a third through groove is arranged on the outer wall of the base, and the third through groove communicates with the first installation groove, and the latch and the first installation groove are connected to each other. The third through-slot is slidingly connected, and the bolt includes a handle protruding from one end of the third through-slot, and the bolt is inserted into the bounce gap to limit the bouncing of the limiting plate. When the bolt and the limiting plate conflict with each other, the limiting plate restricts the sliding of the sliding rod ,

The outer peripheral wall of the sliding rod is provided with a first tooth block, and several second tooth blocks are arranged equidistantly along the axial direction of the receiving groove on the limit plate, and the first tooth block meshes with several second tooth blocks, and the sliding When the rod slides up and down, the first tooth block bounces between the adjacent second tooth blocks.

As a further improvement of the present invention, the lower end of the buckle groove is provided with a first through groove communicating with it, and a second locking assembly is arranged in the first through groove, and the second locking assembly is used to limit the sliding of the fastener. A groove is provided on the side facing the first through groove, the groove is used for inserting the second locking component, the second locking component is slidingly connected with the first through groove, and the second locking component and the first locking component are interlocked.

The second locking assembly includes a plunger, which slides in the first slot. The bolt is provided with a linkage block, which is arranged at the lower end of the plunger. When the bolt is inserted into the bounce gap, the linkage block drives the plunger to the buckle One side of the groove slides into the groove,

The second locking assembly also includes a second spring piece and a mounting plate. One end of the second spring piece is connected to the mounting plate, and the other end is connected to the insertion rod. The mounting plate is arranged on the upper end of the linkage block to resist it. The end of the insertion rod close to the buckle groove is provided with a third slope. , the third slope faces the opening side of the buckle groove.

As a further improvement of the present invention, a first chute is provided on the sliding seat, and a slider is axially provided on the peripheral wall of the connecting arm, the slider is slidably connected to the first chute, and the slider is hinged to the connecting arm.

As a further improvement of the present invention, the base is provided with a clamping groove for fastening the handle, the clamping groove is perpendicular to the first through groove, and the clamping groove and the first through groove communicate with each other.

As a further improvement of the present invention, the gripper is screwed to the connecting arm, the gripper includes an upper hook plate and a lower hook plate bent downward, the upper hook plate and the lower hook plate clamp each other, the upper hook plate and the lower hook plate A torsion spring is arranged between them, and the upper hook plate and the lower hook plate are hinged by the torsion spring, and the lower hook plate and the upper hook plate are attached to each other when they are closed and clamped.

The beneficial effect of the present invention is: when in use, the fixing device is fixed on the operating bed frame, the surgical cover is covered on the patient, the fixing ring is aligned with the position of the operation opening, and the fixing ring is fixed and suspended in the operation opening through the fixing device At the upper end, the surgical drape is detachably connected to the fixing ring. By setting hooks at the lower end of the fixing ring, several hooks are connected to the connection holes of the surgical drape. The structure is simple and the connection is more convenient. It is convenient to install. In addition, the fixing ring is set on the upper end of the operation opening to facilitate the support point of various surgical instruments, making the doctor more stable during the operation. Several hooks are fixed on the linkage plate, and the linkage plate drives the hook The hook piece is in the shape of a circular arc. When extending outward, one end of the fixed ring is close to the side wall of the fixed ring to prevent the surgical drapes from slipping. By setting the adjusting block in the toggle cavity, the adjustment The block is used to locate the two telescopic states of the hook piece. When in use, the plectrum is moved downward to drive the hook piece to protrude outward. When the plectrum is pressed down, the linkage plate pushes the adjustment block to slide to the side of the sliding groove. Its adjustment block releases the restriction on the linkage plate. After the linkage plate is moved downwards, its conflicting part slides along the arc-shaped sliding surface to the second conflicting surface of the regulating block. The first inclined surface of the conflicting part and the second conflicting surface Conflict with each other, after the hook piece protrudes and penetrates into the connecting hole, the adjustment block restricts the upward sliding of the linkage plate. When the surgical cover needs to be removed, the paddle is moved upward, and the adjustment block slides to the side of the shifting groove. The adjustment block releases the limit of the linkage plate, and after the linkage plate is moved upwards, its contact part slides along the arc-shaped sliding surface to the first contact surface of the adjustment block, and the second inclined surface of the contact part and the first contact surface mutually When there is no external force, the hook keeps shrinking in the sliding groove. The arc center of the hook is set at the same axis as the hinge point of the linkage plate in the design. When the size of the operation opening needs to be adjusted, the lifting telescopic rod drives The traction assembly lifts up and down. When the telescopic rod drives one end of the connecting arm to rise, because the middle section of the connecting arm is supported by the fixed ring, the gripper pulls the tissue around the surgical incision outward and downward, so as to fine-tune the size of the surgical incision.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the installation structure of the fixing device and the traction assembly of the present invention;

Fig. 3 is a sectional view of the installation structure of the fixing device and the traction assembly of the present invention;

Fig. 4 is a state diagram in which the first locking assembly and the second locking assembly are not locked;

Fig. 5 is a state diagram of locking of the first locking assembly and the second locking assembly;

Fig. 6 is a schematic diagram of the installation structure of the connecting arm and the sliding seat;

Fig. 7 is a diagram of the use state of the hook shrinking in the fixing ring;

Fig. 8 is a diagram of the use state of the hook protruding from the fixing ring;

Fig. 9 is a schematic diagram of the installation structure of the hook, the linkage plate and the driving lever.

a1, fixing device; a2, traction assembly; a3, support frame; a4, telescopic rod; a5, gripper; a6, connecting arm; a7, base; a8, sliding rod; a9, accommodation groove; a10, sliding seat ; a11, buckle; a12, buckle groove; a13, upper hook plate; a14, lower hook plate; a15, torsion spring; a16, buffer rubber strip; a17, second through groove; edge; a20, connection plate; b1, first locking component; b2, limit plate; b3, latch; b4, first installation groove; b5, first spring member; b6, bounce gap; b7, third through groove; b8, handle; b9, first tooth block; b10, second tooth block; b11, first through groove; b12, groove; b13, insert rod; b14, linkage block; b15, second spring member; b16, installation plate; b17, third slope; b18, first chute; b19, slider; b20, clip slot; c1, cover ring assembly; c2, surgical cover; c3, fixed ring; c4, opening; c5, hook c6, connecting hole; c7, toggle cavity; c8, linkage plate; c9, sliding groove; c10, paddle; c11, toggle groove; c12, conflicting part; c13, first slope; c14, second Inclined surface; c15, adjustment block; c16, first conflicting surface; c17, second conflicting surface; c18, arc-shaped sliding surface; c19, third spring member; c20, support groove.

Detailed ways

The present invention will be described in further detail below in conjunction with the embodiments given in the accompanying drawings.

Referring to Figures 1-9, this embodiment discloses a traction device for hepatobiliary surgery that facilitates adjustment of the size of the opening c4, including a fixing device a1, a traction assembly a2, and a cover ring assembly c1, and the cover ring assembly c1 includes a surgical drapes c2 and the fixing ring c3, the surgical cover c2 is provided with an opening c4, the fixing ring c3 is detachably connected to the opening c4, the fixing ring c3 is used to support the opening c4 of the surgical cover c2, the fixing ring c3 is fixed with the fixing device a1 connect,

The lower end surface of the fixed ring c3 is provided with several hooks c5, the hooks c5 are bent toward the outer side of the fixed ring c3, and the cover cloth is provided with several connecting holes c6 at the opening c4, and the hooks c5 are hooked into the connecting holes c6 to fix the cover cloth , the fixed ring c3 is provided with a toggle chamber c7, the toggle chamber c7 is provided with a linkage plate c8, the fixed ring c3 is provided with a sliding groove c9 for the hook c5 to expand and contract, and the sliding groove c9 communicates with the toggle chamber c7, Several hooks c5 extend into the toggle cavity c7 through the sliding groove c9 and are fixed on the linkage plate c8, the linkage plate c8 drives the hooks c5 to enter and exit the connecting hole c6, the linkage plate c8 is provided with a paddle c10, and the inner ring surface of the fixed ring c3 Set the toggle groove c11, the toggle groove c11 and the toggle cavity c7 are connected to each other, the pick c10 extends out of the toggle groove c11,

The end of the linkage plate c8 facing away from the toggle groove c11 is hinged to the inner wall of the toggle chamber c7, and the end of the linkage plate c8 away from the hinge point is a contact part c12, and the upper and lower ends of the contact part c12 are respectively provided with a first inclined plane c13 and a second inclined plane c14. The first inclined plane c13 and the second inclined plane c14 clamp each other, the conflicting part c12 is pointed, and the adjusting block c15 is arranged in the toggle chamber c7, and the adjusting block c15 is arranged at the end away from the hinge point of the linkage plate c8, and the adjusting block c15 Used to limit the rotation of the linkage plate c8, the adjustment block c15 is provided with a first conflicting surface c16, a second conflicting surface c17 and an arc-shaped sliding surface c18, the first conflicting surface c16 is used to fit and interfere with the first slope c13, and the second The second collision surface c17 is used to fit and interfere with the second inclined surface c14. The arc-shaped sliding surface c18 connects the first collision surface c16 and the second collision surface c17. The arc-shaped sliding surface c18 is used for the sliding of the linkage plate c8. The adjustment block c15 is provided with at least two third spring elements c19, and the at least two third spring elements c19 are respectively distributed in the toggle direction of the linkage plate c8, and the third spring element c19 keeps the adjustment block c15 in contact with the inner wall of the toggle chamber c7 Elastic connection, the third spring member c19 keeps the adjustment block c15 to limit the linkage plate c8 to rotate,

The traction component a2 is slidingly connected with the fixing device a1, the fixing device a1 includes a support frame a3 and a telescopic rod a4, the support frame a3 is fixedly connected with the operating table, the telescopic rod a4 drives the traction component a2 up and down, and the traction component a2 includes a traction operation opening c4 The gripper a5 and the connecting arm a6 are provided with a supporting groove on the fixing ring c3, one end of the connecting arm a6 is slidingly connected with the telescopic rod a4, the middle section of the connecting arm a6 is slidingly connected with the supporting groove, and the gripper a5 extends into the fixing ring c3,

The telescopic rod a4 includes a base a7 and a sliding rod a8, the base a7 is provided with a receiving groove a9, the sliding rod a8 is slidingly connected with the receiving groove a9, the upper end of the sliding rod a8 is provided with a sliding seat a10, and the connecting arm a6 is connected with the sliding The seat a10 is slidingly connected, the connecting arm a6 is provided with a buckle a11, the base a7 is provided with a buckle groove a12, the buckle a11 and the buckle groove a12 are mutually buckled,

The base a7 is provided with a first locking component b1, and the first locking component b1 is used to control the height of the sliding rod a8.

When in use, fix the fixing device a1 on the operating bed frame, cover the patient with the surgical drapes c2, align the fixing ring c3 with the position of the operation opening c4, and the fixing ring c3 is fixed and suspended in the operation opening c4 through the fixing device a1 At the upper end, the surgical drapes c2 are detachably connected to the fixing ring c3. By setting the hooks c5 at the lower end of the fixing ring c3, several hooks c5 are connected to the connection holes c6 of the surgical drapes c2. The structure is simple and the connection is more convenient. The hook c5 can be retracted and stored to facilitate installation. In addition, its fixing ring c3 is set on the upper end of the operation opening c4 to facilitate the support of various surgical instruments and make the doctor more stable during the operation. Several hooks c5 are fixed On the linkage plate c8, the hook piece c5 of the linkage plate c8 is stretched and stretched, and the hook piece c5 is in the shape of a circular arc. When it stretches out, one end of the fixing ring c3 and the side wall of the fixing ring c3 are close to each other to prevent The surgical cover c2 slips, and the adjustment block c15 is set in the toggle cavity c7, and the adjustment block c15 is used to locate the two telescopic states of the hook c5. When in use, move the pick c10 downward to drive the hook c5 to It protrudes outward, and when the paddle c10 is pressed down, the linkage plate c8 pushes the adjustment block c15 to slide to the side of the sliding groove c9, and the adjustment block c15 releases the restriction on the linkage plate c8, and after the linkage plate c8 is moved downward, it The collision part c12 slides along the arc-shaped sliding surface c18 to the second collision surface c17 of the adjustment block c15, the first slope c13 of the collision part c12 and the second collision surface c17 collide with each other, and the hook c5 protrudes and penetrates into the connection After entering the hole c6, the adjustment block c15 restricts the upward sliding of the linkage plate c8. When the surgical cover c2 needs to be disassembled, the paddle c10 is moved upwards, and the adjustment block c15 slides to the side of the toggle groove c11, and the adjustment block c15 is released. For the limit of the linkage plate c8, after the linkage plate c8 is moved upwards, its contact part c12 slides along the arc-shaped sliding surface c18 to the first contact surface c16 of the adjustment block c15, and the second inclined surface c14 of the contact part c12 and The first contact surface c16 is in conflict with each other, and the hook c5 keeps shrinking in the sliding groove c9 without the action of external force. The arc center of the hook c5 is set at the same axis as the hinge point of the linkage plate c8 in the design, and it needs to be adjusted When the size of the operation opening c4 is large, the lifting telescopic rod a4 drives the traction component a2 to go up and down. When the telescopic rod a4 drives one end of the connecting arm a6 to rise, because the middle section of the connecting arm a6 is supported by the fixed ring c3, the gripper a5 is pulled outward and downward Tissue around the surgical incision to fine-tune the size of the surgical incision.

As an improved specific embodiment, the connecting arm a6 is provided with a second through groove a17, the fastening piece a11 includes a mounting rod a18 and a flange a19, the mounting rod a18 is slidably connected with the second through groove a17, and the flange a19 is connected with the second through groove a17. The buckle slot a12 is engaged, and the telescopic rod a4 is extended to the side of the connecting arm a6 with a connecting plate a20, and the connecting plate a20 is used to receive the flange a19.

Set the fastening piece a11 to be slidingly connected with the connecting arm a6, and set the receiving plate a20 at the lower end, so that when adjusting the traction angle of the connecting arm a6, the angle of the fastening piece a11 can be fine-tuned, and the fastening piece is always maintained The a11 is aligned with the buckle groove a12, so that the buckle a11 and the buckle groove a12 are engaged with each other conveniently after the connecting arm a6 slides into place.

As an improved specific embodiment, the first locking assembly b1 includes a limit plate b2 and a latch b3, the inner arm of the receiving groove a9 is provided with an axial first installation groove b4, and the first installation groove b4 is provided with a first spring part b5, the limit plate b2 is elastically connected to the first installation groove b4 through the first spring part b5, there is a bounce gap b6 between the limit plate b2 and the first installation groove b4, and a third through groove is provided on the outer wall of the base a7 b7, the third through groove b7 communicates with the first installation groove b4, the bolt b3 is slidingly connected with the third through groove b7, the bolt b3 includes a handle b8 protruding from the end of the third through groove b7, and the bolt b3 is inserted into the bounce gap b6 limit the bouncing of the limit plate b2, when the latch b3 and the limit plate b2 interfere with each other, the limit plate b2 limits the sliding of the sliding rod a8,

The first tooth block b9 is arranged on the outer peripheral wall of the sliding rod a8, and several second tooth blocks b10 are arranged equidistantly along the axial direction of the accommodation groove a9 on the limit plate b2, and the first tooth block b9 and several second tooth blocks The blocks b10 are engaged with each other, and when the sliding rod a8 slides up and down, the first tooth block b9 bounces between the adjacent second tooth blocks b10.

The locking structure of the telescopic rod a4 is easy to operate. When the height of the telescopic rod a4 needs to be adjusted, the latch b3 is slid downward, and the latch b3 and the limit plate b2 are released from the conflicting restriction. When the sliding rod a8 is pulled to slide, The limiting plate b2 bounces in the first installation groove b4, and the first tooth block b9 on the sliding rod a8 bounces between several adjacent second tooth blocks b10. When the sliding rod a8 needs to be positioned, the The latch b3 slides along the third through groove b7 into the bounce gap b6 between the limiting plate b2 and the first installation groove b4, limiting the bouncing of the limiting plate b2, and the first tooth block b9 limits the adjacent second tooth block b10 to lock the slide bar a8.

As an improved specific embodiment, the lower end of the buckle groove a12 is provided with a first through groove b11 communicating with it, and a second locking component is arranged in the first through groove b11, and the second locking component is used to limit the buckle a11 Sliding out, the buckle a11 is provided with a groove b12 on the side facing the first through groove b11, the groove b12 is used for insertion of the second locking component, the second locking component is slidably connected with the first through groove b11, and the second locking component interlocking with the first locking component b1,

The second locking assembly includes a plunger b13, which slides in the first through groove b11, and the latch b3 is provided with a linkage block b14, which is arranged at the lower end of the plunger b13, and inserts the latch b3 into the bounce gap b6 At this time, the linkage block b14 drives the insertion rod b13 to slide to the side of the buckle groove a12 and insert into the groove b12,

The second locking assembly also includes a second spring member b15 and a mounting plate b16. One end of the second spring member b15 is connected to the mounting plate b16, and the other end is connected to the insertion rod b13. The installation plate b16 is set on the upper end of the linkage block b14 to interfere with it, and the insertion rod b13 is close to One end of the buckle groove a12 is provided with a third slope b17, and the third slope b17 is facing toward the side of the opening c4 of the buckle groove a12.

Set the second locking component to make the traction component a2 slide to the side of the operating table and then lock it to prevent the traction component a2 from slipping during the operation, and set the second locking component and the first locking component b1 to be linked , so that the pulling positioning and height adjustment of the traction component a2 can be adjusted in place at one time. After the height is adjusted in place, when the latch b3 is inserted into the bounce gap b6, the linkage block b14 integrated with it drives the installation plate b16 to push the insertion rod b13 into the groove b12 of the buckle a11 to prevent buckling The part a11 is disengaged from the buckle groove a12, so that the traction assembly a2 is firmly positioned to ensure the safety of the operation.

As an improved specific embodiment, a first chute b18 is provided on the sliding seat a10, and a slider b19 is axially provided on the outer peripheral wall of the connecting arm a6, and the slider b19 is slidably connected with the first chute b18, and the connecting arm a6 It is more stable during sliding.

As an improved embodiment, the base a7 is provided with a clamping groove b20, which is used to buckle the handle b8, and the clamping groove b20 is perpendicular to the first through groove b11, and the clamping groove b20 and The first through groove b11 communicates with each other, and the height position of the locking groove b20 is at the same height as the handle b8 when the bolt b3 is inserted into the bounce gap b6. When in use, after the bolt b3 is inserted into the bounce gap b6, turn the handle b8 to the clip. Connect the groove b20 to prevent the bolt b3 from coming out.

As an improved embodiment, the handle a5 is screwed to the connecting arm a6, the handle a5 includes an upper hook plate a13 and a lower hook plate a14 bent downward, and the upper hook plate a13 and the lower hook plate a14 clamp each other There is a torsion spring a15 between the upper hook plate a13 and the lower hook plate a14, the upper hook plate a13 and the lower hook plate a14 are hinged by the torsion spring a15, and the lower hook plate a14 and the upper hook plate a13 stick to each other when they are closed and clamped combine.

The gripper a5 is set as a clamping structure, which is different from the existing retractor structure that needs to puncture the hook into the tissue structure to reduce further damage to the patient's body tissue, and the gripper a5 is set as a bent upper hook plate a13 And the lower hook plate a14, when it does not need to be clamped and closed, can pull part of the tissue to achieve multi-purpose switching.

The above are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention should also be regarded as the protection scope of the present invention.

Claims (7)

1. A traction device for hepatobiliary surgery that facilitates the adjustment of the size of the opening, characterized in that it includes a fixation device (a1), a traction assembly (a2) and a shroud assembly (c1), and the shroud assembly (c1) includes an operation A cover (c2) and a fixing ring (c3), the surgical cover (c2) is provided with an opening (c4), the fixing ring (c3) is detachably connected to the opening (c4), the fixing ring (c3 ) is used to support the opening (c4) of the surgical drapes (c2), the fixing ring (c3) is fixedly connected with the fixing device (a1), The lower end surface of the fixed ring (c3) is provided with several hooks (c5), the hooks (c5) are bent toward the outer side of the fixed ring (c3), and the cover cloth is provided with several connecting parts at the opening (c4) hole (c6), the hook piece (c5) is hooked into the connecting hole (c6) to fix the cover cloth, the fixing ring (c3) is provided with a toggle cavity (c7), and the toggle cavity (c7) is set There is a linkage plate (c8), and the fixed ring (c3) is provided with a sliding groove (c9) for the hook piece (c5) to expand and contract. The sliding groove (c9) is connected with the toggle cavity (c7), and several The hook (c5) extends into the toggle cavity (c7) through the sliding groove (c9) and is fixed on the linkage plate (c8), and the linkage plate (c8) drives the hook (c5) into and out of the connection hole (c6) , The linkage plate (c8) is provided with a plectrum (c10), and the inner ring surface of the fixed ring (c3) is provided with a toggle groove (c11), and the toggle groove (c11) and the toggle chamber (c7) communicate with each other , the plectrum (c10) protrudes from the toggle groove (c11), The end of the linkage plate (c8) facing away from the toggle groove (c11) is hinged to the inner wall of the toggle chamber (c7). The upper and lower end surfaces are respectively provided with a first inclined plane (c13) and a second inclined plane (c14), the first inclined plane (c13) and the second inclined plane (c14) clamp each other, and the said conflicting part (c12) is pointed, so An adjustment block (c15) is arranged in the toggle chamber (c7), and the adjustment block (c15) is arranged at an end away from the hinge point of the linkage plate (c8), and the adjustment block (c15) is used to limit the rotation of the linkage plate (c8), The regulating block (c15) is provided with a first conflicting surface (c16), a second conflicting surface (c17) and an arc-shaped sliding surface (c18), and the first conflicting surface (c16) is used for contacting the first inclined surface ( c13) fit and interfere with each other, the second conflict surface (c17) is used for mutual fit and conflict with the second inclined surface (c14), and the arc-shaped sliding surface (c18) connects the first conflict surface (c16) and the second Two conflicting surfaces (c17), the arc-shaped sliding surface (c18) is used for the sliding of the linkage plate (c8), and the adjustment block (c15) is provided with at least two third spring members (c19), at least two The third spring parts (c19) are respectively distributed in the toggle direction of the linkage plate (c8), and the third spring parts (c19) keep the adjustment block (c15) elastically connected with the inner wall of the toggle cavity (c7). The spring part (c19) keeps the adjustment block (c15) limit linkage plate (c8) to rotate, The traction assembly (a2) is slidingly connected to the fixing device (a1), the fixing device (a1) includes a support frame (a3) and a telescopic rod (a4), the support frame (a3) is fixedly connected to the operating table, the The telescopic rod (a4) drives the traction assembly (a2) up and down, the traction assembly (a2) includes a handle (a5) and a connecting arm (a6) for pulling the operation opening (c4), and the fixing ring (c3) A support groove (c20) is arranged on the top, one end of the connecting arm (a6) is slidably connected with the telescopic rod (a4), the middle section of the connecting arm (a6) is slidably connected with the support groove (c20), and the gripper (a5) extends into the fixed ring (c3), the telescopic rod (a4) includes a base (a7) and a sliding rod (a8), the base (a7) is provided with a receiving groove (a9), and the sliding rod (a8) It is slidingly connected with the receiving groove (a9), the upper end of the sliding rod (a8) is provided with a sliding seat (a10), the connecting arm (a6) is slidingly connected with the sliding seat (a10), and the connecting arm ( a6) is provided with a buckle (a11), the base (a7) is provided with a buckle groove (a12), and the buckle (a11) and the buckle groove (a12) are buckled together, The base (a7) is provided with a first locking assembly (b1), and the first locking assembly (b1) is used to control the height of the sliding rod (a8). 2. A pulling device for hepatobiliary surgery that is convenient for adjusting the size of the opening according to claim 1, characterized in that: the connecting arm (a6) is provided with a second through groove (a17), and the fastening member (a11) includes a mounting rod (a18) and a flange (a19), the mounting rod (a18) is slidingly connected to the second through groove (a17), and the flange (a19) is engaged with the buckle groove (a12), The telescoping rod (a4) is extended to one side of the connecting arm (a6) and provided with a connecting plate (a20), and the connecting plate (a20) is used for receiving the flange (a19). 3. A retracting device for hepatobiliary surgery according to claim 2, characterized in that: the first locking assembly (b1) includes a limiting plate (b2) and a latch (b3), the The inner arm of the receiving groove (a9) is provided with an axial first installation groove (b4), the first installation groove (b4) is provided with a first spring member (b5), and the limit plate (b2) passes through The first spring member (b5) is elastically connected to the first installation groove (b4), there is a bounce gap (b6) between the limiting plate (b2) and the first installation groove (b4), and the base (a7) A third through-slot (b7) is provided on the outer wall, and the third through-slot (b7) communicates with the first installation groove (b4), and the latch (b3) is slidingly connected with the third through-slot (b7). The bolt (b3) includes a handle (b8) protruding from one end of the third through slot (b7). The bolt (b3) is inserted into the bounce gap (b6) to limit the bounce of the limiting plate (b2). When the positioning plates (b2) conflict with each other, the limiting plate (b2) limits the sliding of the sliding rod (a8), A first tooth block (b9) is arranged on the outer peripheral wall of the sliding rod (a8), and several second tooth blocks ( b10), the first tooth block (b9) meshes with several second tooth blocks (b10), when the sliding rod (a8) slides up and down, the first tooth block (b9) is on the adjacent second tooth Bounce between blocks (b10). 4. A traction device for hepatobiliary surgery that facilitates the adjustment of the size of the opening according to claim 3, characterized in that: the lower end of the buckle groove (a12) is provided with a first through groove (b11) communicating with it, the first through groove (b11) A second locking component is arranged in a through groove (b11), and the second locking component is used to limit the sliding of the buckle (a11), and the buckle (a11) is set toward the side of the first through groove (b11) There is a groove (b12), the groove (b12) is inserted into the second locking assembly, the second locking assembly is slidingly connected with the first through groove (b11), and the second locking assembly is connected with the first locking assembly ( b1) mutual linkage, The second locking assembly includes a plunger (b13), which slides in the first through groove (b11), and the latch (b3) is provided with a linkage block (b14), and the linkage block (b14 ) is set at the lower end of the insertion rod (b13). When the latch pin (b3) is inserted into the bounce gap (b6), the linkage block (b14) drives the insertion rod (b13) to slide to the buckle groove (a12) and insert into the groove (b12 ), The second locking assembly also includes a second spring member (b15) and a mounting plate (b16), one end of the second spring member (b15) is connected to the mounting plate (b16), and the other end is connected to the insertion rod (b13), the The mounting plate (b16) is arranged on the upper end of the linkage block (b14) to be in contact with it, and the end of the insertion rod (b13) close to the buckle groove (a12) is provided with a third slope (b17), and the third slope (b17) faces the buckle groove ( a12) One side of the opening (c4). 5. A pulling device for hepatobiliary surgery that is convenient for adjusting the size of the opening according to claim 4, characterized in that: the sliding seat (a10) is provided with a first chute (b18), and the connecting arm ( a6) A slider (b19) is arranged axially on the outer peripheral wall, and the slider (b19) is slidably connected to the first slide groove (b18), and the slider (b19) is hinged to the connecting arm (a6). 6. A pulling device for hepatobiliary surgery that facilitates adjustment of the opening size according to claim 5, characterized in that: the base (a7) is provided with a snap-in groove (b20), and the snap-in slot (b20) Used to fasten the handle (b8), the engaging groove (b20) is arranged vertically to the first through groove (b11), and the engaging groove (b20) communicates with the first through groove (b11). 7. A pulling device for hepatobiliary surgery that is convenient for adjusting the size of the opening according to claim 1, characterized in that: the gripper (a5) is threadedly connected to the connecting arm (a6), and the gripper (a5) It includes an upper hook plate (a13) and a lower hook plate (a14) bent downward, the upper hook plate (a13) and the lower hook plate (a14) are clamped mutually, and the upper hook plate (a13) and the lower hook plate A torsion spring (a15) is arranged between (a14), the upper hook plate (a13) and the lower hook plate (a14) are hinged by the torsion spring (a15), and the lower hook plate (a14) and the upper hook plate (a13) Snap together when clamped closed.