CN115054294A - Hepatobiliary surgery is with operation auxiliary device - Google Patents

Abstract

The invention discloses an operation auxiliary device for hepatobiliary surgery, which comprises a driving bin, two expansion arms and two expansion plates, wherein the driving bin is arranged on an operating bed and can be adjusted in height, a power source in the driving bin drives the expansion arms to pull the expansion plates to expand gaps between sternums, one end of each expansion arm is inserted into the driving bin, and the expansion plates are arranged at the other ends of the corresponding expansion arms; further comprising: the driving rod is positioned in the driving bin. In the sternum expanding process of the improved auxiliary device, once the pushing force of the expanding plate on the sternum is too large, the limiting rod can automatically lock the expanding arm to stop the expanding operation of the sternum, the elastic pull rope is rolled up by the driving rod in the process of pushing the expanding arm to pull the other end of the expanding arm, the stress difference at two ends of the driving arm is reduced when the driving rod pushes the expanding arm to move, and the device is simple to operate.

Description

Hepatobiliary surgery is with operation auxiliary device

Technical Field

The invention relates to the technical field of medical instruments, in particular to an operation auxiliary device for hepatobiliary surgery.

Background

Liver and gall surgery mainly studies hepatocellular carcinoma, hepatobiliary calculus, posthepatitic cirrhosis and acute liver failure caused by severe hepatitis are major diseases seriously threatening the health of Chinese people. Generally, in clinical practice, when a hepatobiliary surgery is performed on a patient, an open cavity surgery is generally adopted, and after the open cavity surgery is performed, superficial tissues or other tissues of the cavity are required to be pulled open to open the thoracic cavity of the human body, so that the surgical operation is facilitated.

The supplementary surgical device for hepatobiliary surgery with publication number CN110897662A comprises a machine body, wherein a driving bin is arranged inside the machine body, an opening is arranged on a side wall of the machine body corresponding to the driving bin, a driving mechanism is arranged inside the driving bin, two expanding components are arranged on one side of the driving mechanism, one end of each expanding component is driven by the driving mechanism, and the other end of each expanding component penetrates through the opening to extend to the outside of the machine body and acts on a sternal incision. The rack is driven to move forwards by pulling the rod, the rack is meshed with the first bevel gear when moving, the first bevel gear rotates to drive the second bevel gear to rotate, the second bevel gear drives the screw rod to rotate, two opposite external threads on the outer wall of the screw rod drive the two sliding blocks to move towards two sides simultaneously, sternum expansion is achieved, and the pull rod is adopted to drive the whole device to perform expansion work.

In the operation process of the device, due to the fact that the physique of each patient is different, the gap between the sternums is different, the optimal operation visual field size is fixed, the sternum can be damaged once the force of the device exceeds the bearing capacity of the sternum in the sternum expanding process, the two ends of the expanding arm are subjected to overlarge force difference due to the fact that the device drives the expanding arm to move on a single side, the expanding arm is prone to being bent or inclined, the expanding effect of the device on the sternum is affected, and finally the device is very troublesome to use.

We have proposed an operation aid for hepatobiliary surgery in order to solve the problems set forth above.

Disclosure of Invention

The invention aims to provide an operation auxiliary device for hepatobiliary surgery, which aims to solve the problems that the sternum is damaged due to the fact that the force of the device exceeds the bearing capacity of the sternum during the sternum expansion process of the operation auxiliary device in the market proposed by the background technology, and the use of the device is influenced due to the fact that the expansion arm is bent or inclined as the device drives the expansion arm to move on a single side.

In order to achieve the purpose, the invention provides the following technical scheme: an operation auxiliary device for hepatobiliary surgery comprises a driving bin, two expansion arms and two expansion plates, wherein the driving bin is installed on an operating bed and can be adjusted in height, a power source in the driving bin drives the expansion arms to pull the expansion plates to expand gaps between sternums, one ends of the expansion arms are inserted into the driving bin, and the expansion plates are installed at the other ends of the corresponding expansion arms; further comprising: the driving rod is positioned in the driving bin, two ends of the driving rod are rotatably connected with the bin wall of the driving bin, through holes are formed in the driving rod, the driving rod penetrates through the two through holes, and a limiting assembly is arranged in the through holes; the fixed block, the fixed block is fixed wears to locate in the bulkhead in drive storehouse, the standing groove has been seted up in the fixed block, be equipped with locating component in the standing groove.

By adopting the technical scheme, in the process of expanding the gap between the sternums by using the device, when the force applied to the expansion plate exceeds a set value, the position of the expansion arm is automatically locked by the limiting component, so that the expansion plate is not expanded continuously, then the driving rod is limited by the positioning component so that the driving rod cannot rotate continuously, and the expansion effect of the device on the sternums is stabilized.

Preferably, the driving rod is formed by integrally pouring a first threaded shaft, a second threaded shaft, two round rods and a connecting rod, and the external threads of the first threaded shaft and the external threads of the second threaded shaft are symmetrically arranged.

Through adopting above-mentioned technical scheme, through the setting of first threaded shaft and second threaded shaft for the actuating lever can drive two expansion arms simultaneously and move in opposite directions or opposite directions.

Preferably, the part of the connecting rod, which is close to the placing groove, is inserted into the placing groove, a motor is arranged in the placing groove, the motor drives the driving rod to rotate through a belt, a first belt pulley and a second belt pulley, and the diameter of the second belt pulley is larger than that of the first belt pulley.

Through adopting above-mentioned technical scheme, slow down the slew velocity that the motor drove the actuating lever through two belt pulleys that differ in size, the belt can slide each other with first belt pulley and second belt pulley simultaneously for the expansion arm can not die the motor card when the card is dead.

Preferably, two elastic pull ropes are arranged between the part, outside the driving bin, of the two expansion arms and the two round rods, one ends of the elastic pull ropes are fixedly connected with the corresponding expansion arms, and the other ends of the elastic pull ropes are inserted into the driving bin and fixedly connected with the peripheral wall of the corresponding round rods.

Through adopting above-mentioned technical scheme, when the actuating lever promoted expansion arm one end and removed, roll up the elasticity stay cord, shorten the length of elasticity stay cord, and then carry on spacingly to the other end of expansion arm, prevent to make expansion arm produce deformation or inclination because of expansion plate atress.

Preferably, the two limiting assemblies respectively comprise a pushing block, the pushing block is respectively sleeved on the outer peripheral side of the first threaded shaft and the outer peripheral side of the second threaded shaft in a threaded manner, each pushing block is located in the corresponding through hole, the pushing block is connected with the inner wall of the corresponding through hole in a sliding manner, a first spring is arranged between the pushing block and the inner wall of the corresponding through hole, and two ends of the first spring are respectively fixedly connected with the inner wall of the corresponding through hole and the corresponding pushing block.

Through adopting above-mentioned technical scheme, when the atress of expansion arm surpassed the elasticity of first spring, the ejector pad slides in the through-hole, and then makes the drive shaft can not continue to promote the expansion arm and remove, sets up the atress threshold value on the expansion arm.

Preferably, the interior bulkhead of drive storehouse is gone up the relative division and is equipped with two constant head tanks, the spout has been seted up to the one end that the expansion arm is located the drive storehouse, and the spout communicates with each other with the through-hole that corresponds, it wears to be equipped with the gag lever post to slide in the spout, the gag lever post is located the one end that corresponds in the through-hole and contacts with the ejector pad that corresponds, be equipped with the second spring between the inner wall of gag lever post and the corresponding spout, and the both ends of second spring respectively with the inner wall that corresponds the spout and the gag lever post fixed connection that corresponds.

Through adopting above-mentioned technical scheme, along with the slip of ejector pad in the through-hole, the ejector pad promotes the gag lever post and inserts the spacing inslot, and gag lever post and spacing groove block prevent that the ejector pad from continuing to drive the expansion arm and remove after compressing first spring at the position in drive storehouse.

Preferably, the positioning assembly comprises a fixed cylinder: the fixed section of thick bamboo is fixed wear to establish with the standing groove in, the fixed section of thick bamboo is worn to be equipped with knob and square piece relatively, the knob rotates with the section of thick bamboo wall of fixed section of thick bamboo to be connected, and the inner wall sliding connection of square piece and fixed section of thick bamboo, the part of knob inserts in the square piece, and knob and square piece threaded connection, one side that the square piece is located the fixed section of thick bamboo outside and the one end that the actuating lever is located the standing groove all fixedly are equipped with a plurality of hemispheric pieces.

Through adopting above-mentioned technical scheme, rotate the knob and promote square piece and remove to the actuating lever direction to make a plurality of hemisphere piece block be in the same place, and then through the block of square piece and solid fixed cylinder inner wall, carry on spacingly to the rotation of screw shaft, die the screw shaft lock.

Preferably, a semi-cylindrical semi-transparent cover is fixedly arranged on the top side of the driving bin in a penetrating mode, two indicating rods are fixedly arranged in the semi-transparent cover in a penetrating mode, one end, located outside the semi-transparent cover, of each indicating rod is fixedly connected with the corresponding expansion arm, and indicating scales are arranged on the outer peripheral wall of the semi-transparent cover in a penetrating mode.

By adopting the technical scheme, the indication rod moves along with the movement of the expansion arm, and the indication rod and the plurality of indication scales on the semitransparent groove are compared, so that an operator can determine the movement distance of the expansion arm in a plurality of directions.

Preferably, the cover is equipped with soft cover on the periphery wall of round bar, and the storehouse wall fixed connection in periphery wall and the drive storehouse of soft cover, the inner wall of soft cover and the inner wall interference fit who corresponds the round bar.

Through adopting above-mentioned technical scheme, increase the frictional force between actuating lever and the drive storehouse inner wall through soft cover, prevent that the threaded spindle from rotating by oneself under the condition that does not receive external force.

Compared with the prior art, the invention has the beneficial effects that: in the sternum expanding process of the device, once the pushing force of the expanding plate on the sternum is too large, the limiting rod can automatically lock the expanding arm to stop the expanding operation of the sternum, the driving rod rolls up the elastic pull rope in the process of pushing the expanding arm to pull the other end of the expanding arm, and the stress difference at the two ends of the driving arm when the driving rod pushes the expanding arm to move is reduced;

1. the expansion arm, the elastic pull rope and the push block are arranged, the starting motor drives the first belt pulley to rotate, the first belt pulley, the second belt pulley and the belt drive the driving rod to slowly rotate, the elastic pull rope is wound up to pull one end of the expansion arm, the push block is matched with the push rod to push the other end of the expansion arm, and the two expansion arms are driven from the two ends of the expansion arm to simultaneously and reversely move in the driving bin along a specific track, so that the expansion arm cannot generate an inclination angle in the moving process, and the stress of the two ends cannot be greatly different;

2. be provided with first spring, ejector pad and gag lever post, when expansion plate atress exceeded the setting value, make the ejector pad slide in the through-hole, and then released the gag lever post from the spout and make the gag lever post insert the spacing inslot, with the position lock of spacing groove block with expansion arm in the drive storehouse extremely for the thrust of expansion plate to the sternum can not be too big.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the driving chamber of the present invention;

FIG. 3 is an enlarged view of the structure of FIG. 2 at A according to the present invention;

FIG. 4 is a schematic view of the internal structure of the expanding arm according to the present invention;

FIG. 5 is a schematic view of the internal structure of the fixing block of the present invention;

FIG. 6 is a schematic view showing the internal structure of the fixing cylinder according to the present invention;

fig. 7 is a schematic view of the overall structure of the driving rod of the present invention.

In the figure: 1. a driving bin; 2. an expansion arm; 3. an expansion plate; 4. a drive rod; 41. a first threaded shaft; 42. a second threaded shaft; 43. a round bar; 44. a connecting rod; 5. a through hole; 6. a limiting component; 61. a push block; 62. a first spring; 63. positioning a groove; 64. a chute; 65. a limiting rod; 66. a second spring; 7. a fixed block; 8. a positioning assembly; 81. a fixed cylinder; 82. a knob; 83. a square block; 84. a hemispherical block; 9. a placement groove; 10. a belt 11, a first pulley; 12. a second pulley; 13. an elastic pull rope; 14 a translucent cover; 15. an indicator bar; 16. a soft sleeve; 17. an electric motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: the utility model provides a hepatobiliary surgery is with operation auxiliary device, includes drive storehouse 1, two expansion arms 2 and two expansion plates 3, and drive storehouse 1 is installed on the operation table and can have more needs height-adjusting, and the power supply in the drive storehouse 1 drives 2 pulling expansion plates 3 of expansion arm and struts the clearance between the sternum, and the one end of expansion arm 2 inserts in drive storehouse 1, and expansion plates 3 installs the other end at corresponding expansion arm 2. A semi-cylindrical semi-transparent cover 14 is fixedly arranged on the top side of the driving bin 1 in a penetrating mode, two indicating rods 15 are fixedly arranged in the semi-transparent cover 14 in a penetrating mode, one end, located outside the semi-transparent cover 14, of each indicating rod 15 is fixedly connected with the corresponding expansion arm 2, and indicating scales are arranged on the outer peripheral wall of the semi-transparent cover 14. The indication rod 15 moves along with the movement of the expansion arm 2, and the moving distance of the expansion arm 2 can be determined by comparing the indication rod 15 with a plurality of indication scales on the semitransparent groove from a plurality of directions.

Referring to fig. 2 and 5, the method further includes: and the driving rod 4 is positioned in the driving bin 1, and two ends of the driving rod 4 are rotatably connected with the bin wall of the driving bin 1. The driving rod 4 is formed by integrally casting a first threaded shaft 41, a second threaded shaft 42, two round rods 43 and a connecting rod 44, wherein the round rods 43 are arranged in an I-shaped shape in front view. The part of the connecting rod 44 close to the placing groove 9 is inserted into the placing groove 9, the motor 17 is arranged in the placing groove 9, the motor 17 drives the driving rod 4 to rotate through the belt 10, the first belt 10 wheel and the second belt 10 wheel, the first belt 10 wheel is provided with a support for limiting the position of the first belt 10 wheel, and the diameter of the second belt 10 wheel is far larger than that of the first belt 10 wheel under the condition that the rotation of the first belt 10 wheel to the second belt 10 wheel is not influenced. Slow down the slew velocity that motor 17 drove actuating lever 4 through two belt 10 wheels not of uniform size, belt 10 simultaneously can slide each other with first belt 10 wheel and second belt 10 wheel for expansion arm 2 can not be dead transship with motor 17 card when the card is dead.

Referring to fig. 2 and 3, the outer peripheral wall of the round rod 43 is sleeved with the soft sleeve 16, the outer peripheral wall of the soft sleeve 16 is fixedly connected with the bin wall of the driving bin 1, and the inner wall of the soft sleeve 16 is in interference fit with the inner wall of the corresponding round rod 43. The friction force between the driving rod 4 and the inner wall of the driving cabin 1 is increased by the soft sleeve 16.

Referring to fig. 2 and 7, the external thread of the first threaded shaft 41 is arranged symmetrically to the external thread of the second threaded shaft 42. The first and second threaded shafts 41 and 42 are arranged so that the driving rod 4 can simultaneously move the two expansion arms 2 towards or away from each other.

Referring to fig. 1, 2, 3 and 7, two elastic ropes 13 are disposed between the portions of the two expansion arms 2 outside the driving compartment 1 and the two round rods 43, one end of each elastic rope 13 is fixedly connected to the corresponding expansion arm 2, and the other end of each elastic rope 13 is inserted into the driving compartment 1 and is fixedly connected to the outer peripheral wall of the corresponding round rod 43. When the driving rod 4 pushes one end of the expansion arm 2 to move, the elastic pull rope 13 is rolled up, the length of the elastic pull rope 13 is shortened, and the other end of the expansion arm 2 is limited.

Referring to fig. 2 and 4, a through hole 5 is formed in the driving rod 4, the driving rod 4 is inserted into the two through holes 5, and a limiting assembly 6 is arranged in the through hole 5. Two spacing subassemblies 6 all include ejector pad 61, the corner of ejector pad 61 is the arc setting, the periphery side of first threaded shaft 41 and the periphery side of second threaded shaft 42 are located to two ejector pads 61 respectively the thread bush, and every ejector pad 61 all is located corresponding through-hole 5, ejector pad 61 and the inner wall sliding connection who corresponds through-hole 5, be equipped with first spring 62 between ejector pad 61 and the inner wall that corresponds through-hole 5, and the both ends of first spring 62 respectively with the inner wall that corresponds through-hole 5 and the ejector pad 61 fixed connection that corresponds, first spring 62 is the hardening spring. When the force applied to the expansion arm 2 exceeds the elastic force of the first spring 62, the push block 61 slides in the through hole 5, so that the driving shaft does not push the expansion arm 2 to move.

Referring to fig. 2 and 4, two positioning grooves 63 are oppositely formed on the inner wall of the driving chamber 1, a sliding groove 64 is formed in one end of the expansion arm 2 located in the driving chamber 1, the sliding groove 64 is communicated with the corresponding through hole 5, a limiting rod 65 is slidably inserted in the sliding groove 64, one end of the limiting rod 65 located in the corresponding through hole 5 is in contact with the corresponding push block 61, two ends of the limiting rod 65 are arranged in a hemispherical shape, and a second spring 66 is arranged between the limiting rod 65 and the inner wall of the corresponding sliding groove 64. Along with the sliding of the pushing block 61 in the through hole 5, the pushing block 61 pushes the limiting rod 65 to be inserted into the limiting groove, the limiting rod 65 is clamped with the limiting groove, and the position of the expansion arm 2 in the driving bin 1 is fixed.

Referring to fig. 2, 5 and 6, the fixing block 7 is fixed by bolts to penetrate through the wall of the driving chamber 1, a placing groove 9 is formed in the fixing block 7, and a positioning assembly 8 is arranged in the placing groove 9. The positioning assembly 8 comprises a fixed cylinder 81: fixed section of thick bamboo 81 is fixed wear to establish with standing groove 9 in, fixed section of thick bamboo 81 facial make-up is equipped with the lid, fixed section of thick bamboo 81 wears to be equipped with knob 82 and square piece 83 relatively, knob 82 rotates with the section of thick bamboo wall of fixed section of thick bamboo 81 to be connected, and the inner wall sliding connection of square piece 83 and fixed section of thick bamboo 81, the part of knob 82 inserts in the square piece 83, and knob 82 and square piece 83 threaded connection, one side that square piece 83 is located outside the fixed section of thick bamboo 81 and the one end that actuating lever 4 is located standing groove 9 are all fixed and are equipped with a plurality of hemisphere pieces 84. The rotating knob 82 pushes the square block 83 to move towards the direction of the driving rod 4, and the plurality of hemispherical blocks 84 are clamped together, so that the rotation of the threaded shaft is limited through the clamping of the square block 83 and the inner wall of the fixed barrel 81, and the threaded shaft is locked.

In summary, during the sternum gap expansion process using the device, when the force of the expansion plate 3 exceeds the set value, the position limiting assembly 6 automatically locks the position of the expansion arm 2, so that the expansion plate 3 is not expanded continuously, and then the positioning assembly 8 is used to limit the drive rod 4 so that the drive rod 4 does not rotate continuously, thereby stabilizing the sternum expansion of the device.

The first embodiment is as follows: as shown in fig. 1, fig. 2, fig. 3 and fig. 7, the starting motor 17 drives the first belt 10 to rotate, and drives the driving rod 4 to rotate slowly together with the second belt 10 and the belt 10, and winds up the elastic pulling rope 13 to pull one end of the expansion arm 2, and cooperates with the pushing block 61 to push the other end of the expansion arm 2, so as to drive the two expansion arms 2 from the two ends of the expansion arm 2 to move reversely along a specific track in the driving bin 1, and drive the indicating rod 15 to move together while the expansion arm 2 moves, so as to change the position of the indicating rod 15 in the semitransparent groove, and the moving distance of the expansion arm 2 is determined by comparing the indicating rod 15 with the indicating scale.

Example two: as shown in fig. 1, 2, 4 and 7, when the stress on the expansion plate 3 exceeds a predetermined value, the pushing force of the driving wheel on the pushing block 61 exceeds the elastic force of the first spring 62 on the pushing block 61, so that the pushing block 61 slides in the through hole 5, at this time, the driving wheel does not continue to drive the expansion arm 2 to move, and at the same time, the pushing block 61 pushes the limiting rod 65 out of the sliding groove 64 and inserts the limiting rod 65 into the limiting groove, and the limiting rod is engaged with the limiting groove to lock the position of the expansion arm 2 in the driving compartment 1, at this time, the belt 10 slips on the first belt 10 wheel and the second belt 10 wheel, and the motor 17 does not rotate when the driving rod 4 is driven and the motor 17 is not overloaded due to the stop rotation of the driving rod 4.

Example three: as shown in fig. 2, 5 and 6, the rotating knob 82 pushes the square block 83 to slide out from the placing groove 9, so that the plurality of hemispherical blocks 84 are clamped together, the square block 83 is connected with the driving shaft into a whole, the driving rod 4 is locked through the clamping between the square block 83 and the inner wall of the fixed cylinder 81, and at this time, the operation of the motor 17 can be stopped.

The working principle is as follows: when the device is used, the driving cabin 1 is installed at a proper position on the operating table, the expansion plate 3 is positioned at a proper position on the corresponding sternum of the patient, the device is operated according to the first embodiment, the expansion plate 3 is driven to expand the gap between the sternums, after the expansion of the gap between the sternums is completed, the driving rod 4 is driven according to the third embodiment, and if the pushing force of the expansion plate 3 on the sternum exceeds a set value in the process of expanding the gap between the sternums of the device, the limiting rod 65 locks the expansion arm 2 as in the second embodiment, and the expansion plate 3 cannot continuously expand the gap between the sternums.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (9)

1. An operation auxiliary device for hepatobiliary surgery comprises a driving bin (1), two expansion arms (2) and two expansion plates (3), wherein the driving bin (1) is installed on an operating bed and can be adjusted in height, a power source in the driving bin (1) drives the expansion arms (2) to pull the expansion plates (3) to expand gaps between sternums, one end of each expansion arm (2) is inserted into the driving bin (1), and each expansion plate (3) is installed at the other end corresponding to each expansion arm (2);

it is characterized by also comprising:

the driving rod (4) is positioned in the driving bin (1), two ends of the driving rod (4) are rotatably connected with the bin wall of the driving bin (1), a through hole (5) is formed in the driving rod (4), the driving rod (4) penetrates through the two through holes (5), and a limiting assembly (6) is arranged in the through hole (5);

the device comprises a fixing block (7), wherein the fixing block (7) is fixedly arranged in a bin wall of the driving bin (1) in a penetrating mode, a placing groove (9) is formed in the fixing block (7), and a positioning assembly (8) is arranged in the placing groove (9).

2. The surgical aid for hepatobiliary surgery according to claim 1, wherein: the driving rod (4) is formed by integrally pouring a first threaded shaft (41), a second threaded shaft (42), two round rods (43) and a connecting rod (44), and the external threads of the first threaded shaft (41) and the external threads of the second threaded shaft (42) are symmetrically arranged.

3. An operation assisting device for hepatobiliary surgery according to claim 2, wherein: the connecting rod (44) is close to the part of the placing groove (9) and is inserted into the placing groove (9), a motor (17) is arranged in the placing groove (9), the motor (17) drives the driving rod (4) to rotate through a belt (10), a first belt pulley (11) and a second belt pulley (12), and the diameter of the second belt pulley (12) is larger than that of the first belt pulley (11).

4. A surgical assistant apparatus for hepatobiliary surgery according to claim 3, wherein: two it is equipped with two elasticity stay cords (13) to expand arm (2) and be located between drive storehouse (1) outer part and two round bars (43), the one end and the expansion arm (2) fixed connection that correspond of elasticity stay cord (13), and the other end of elasticity stay cord (13) insert in drive storehouse (1) and with the periphery wall fixed connection that corresponds round bar (43).

5. An operation assisting device for hepatobiliary surgery according to claim 1, wherein: two spacing subassembly (6) all include ejector pad (61), two ejector pad (61) respectively the periphery side of first threaded spindle (41) and the periphery side of second threaded spindle (42) are located to screw thread cover, and every ejector pad (61) all is located corresponding through-hole (5), ejector pad (61) and the inner wall sliding connection who corresponds through-hole (5), be equipped with first spring (62) between ejector pad (61) and the inner wall that corresponds through-hole (5), and the both ends of first spring (62) respectively with the inner wall that corresponds through-hole (5) and ejector pad (61) fixed connection that corresponds.

6. The surgical assistant apparatus for hepatobiliary surgery of claim 5, wherein: the utility model discloses a drive storehouse, including drive storehouse (1), expansion arm (2), spout (64) have been seted up to the one end that expansion arm (2) are located drive storehouse (1), and spout (64) communicate with each other with corresponding through-hole (5), slide in spout (64) and wear to be equipped with gag lever post (65), gag lever post (65) are located the one end that corresponds in through-hole (5) and are contacted with ejector pad (61) that correspond, be equipped with second spring (66) between gag lever post (65) and the inner wall that corresponds spout (64), and the both ends of second spring (66 respectively with the inner wall that corresponds spout (64) and gag lever post (65) fixed connection that corresponds.

7. A surgical aid for hepatobiliary surgery according to claim 3, characterized in that the positioning assembly comprises a fixed cylinder (81): fixed section of thick bamboo (81) are fixed wear to establish with standing groove (9) in, fixed section of thick bamboo (81) wear to be equipped with knob (82) and square piece (83) relatively, knob (82) rotate with the section of thick bamboo wall of fixed section of thick bamboo (81) to be connected, and the inner wall sliding connection of square piece (83) and fixed section of thick bamboo (81), the part of knob (82) inserts in square piece (83), and knob (82) and square piece (83) threaded connection, square piece (83) lie in fixed section of thick bamboo (81) outer one side and actuating lever (4) lie in one end of standing groove (9) and all fixedly be equipped with a plurality of hemisphere pieces (84).

8. An operation assisting device for hepatobiliary surgery according to claim 4, wherein: the top side of drive storehouse (1) is fixed to wear to be equipped with shape for semi-cylindrical translucent cover (14), translucent cover (14) internal fixation is worn to be equipped with two and is instructed stick (15), and every instructs stick (15) to be located translucent cover (14) outer one end and corresponding expansion arm (2) fixed connection, the periphery wall facial make-up of translucent cover (14) is equipped with the indication scale.

9. An operation assisting device for hepatobiliary surgery according to claim 2, wherein: the cover is equipped with soft cover (16) on the periphery wall of round bar (43), and the storehouse wall fixed connection in periphery wall and the drive storehouse (1) of soft cover (16), the inner wall of soft cover (16) and the inner wall interference fit who corresponds round bar (43).

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