A variable-diameter casing system with a drive structure and its usage method

Abstract

The present invention discloses a variable-diameter cannula system with a drive structure and a usage method in the technical field of surgical instruments, including a first sealing shell, a second sealing shell and a thin film tube sleeve. It further includes three arc-shaped tube sleeves which are radially slidably arranged at the lower end of the second sealing shell and coaxial with the through hole, and the three arc-shaped tube sleeves are jointly sleeved with the thin film tube sleeve; a steering mechanism which is arranged at the upper end of the arc-shaped tube sleeve; a disassembly mechanism which is arranged in the second sealing shell and is used for quickly disassembling and assembling the arc-shaped tube sleeve; and a drive mechanism which is used for controlling the radial movement of the arc-shaped tube sleeve and serving as the steering mechanism. Through controlling the radial movement of the three arc-shaped tube sleeves and cooperating with the thin film tube sleeve to seal the gaps between the three arc-shaped tube sleeves, the device of the present invention can adapt to surgeries with different requirements, and at the same time, can also make appropriate inner diameter adjustments according to the surgical conditions, making the surgery more flexible.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical instruments, and particularly to a variable-diameter cannula system with a drive structure and a usage method thereof. Background Art

[0002] A trocar is a surgical instrument used to establish an artificial passage into the body cavity during minimally invasive surgery; it usually consists of a cannula assembly and a trocar needle; its general clinical usage method is: first make a small incision on the patient's skin, then penetrate the trocar needle through the cannula assembly, and then penetrate the abdominal wall through the skin opening together; once inside the body cavity, the trocar needle is removed, leaving the cannula assembly as the passage for the instrument to enter and exit the body cavity.

[0003] After the traditional variable-diameter cannula is used, since the cannula cannot be removed and due to the slender characteristics of the cannula, it is not easy to clean and disinfect the cannula, which further increases the workload of medical staff for cleaning and disinfecting the equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a variable-diameter cannula system with a drive structure and a usage method thereof, so as to solve the problem that after the traditional variable-diameter cannula is used, due to the inability to remove the cannula and the slender characteristics of the cannula, it is not easy to clean and disinfect the cannula, which further increases the workload of medical staff for cleaning and disinfecting the equipment as mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A variable-diameter cannula system with a drive structure, including a first sealing shell, a second sealing shell and a thin film tube sleeve. The first sealing shell is fixedly connected to the upper end of the second sealing shell. A through hole is provided at the axial center position of the first sealing shell and the second sealing shell. The through hole is the access channel for surgical instruments. A sealing mechanism is externally connected to the through hole in the first sealing shell. The sealing mechanism is used to seal the through hole. The thin film tube sleeve can be hermetically connected to the lower end of the second sealing shell. It also includes three arc-shaped tube sleeves. The three arc-shaped tube sleeves are radially slidably arranged at the lower end of the second sealing shell and are coaxial with the through hole. The three arc-shaped tube sleeves are jointly sleeved with the thin film tube sleeve. The three arc-shaped tube sleeves and the thin film tube sleeve jointly form a channel for surgical instruments to enter and exit;

[0006] A steering mechanism is arranged at the upper end of the arc-shaped tube sleeve. The steering mechanism is used to make the arc-shaped tube sleeve rotate around one side as the axis;

[0007] A disassembly mechanism is arranged inside the second sealing shell. The disassembly mechanism is used to quickly disassemble and assemble the arc-shaped tube sleeve;

[0008] A drive mechanism is used to control the radial movement of the arc-shaped tube sleeve and provide driving force for the steering mechanism.

[0009] As a further solution of the present invention, the driving mechanism includes three sliders respectively connected to the upper end of the arc-shaped pipe sleeve. First installation grooves are respectively formed at the lower end of the second sealing shell corresponding to the position of the arc-shaped pipe sleeve. First track plates and second track plates are respectively arranged on both side walls of the first installation groove. The sliders are respectively slidably connected to the corresponding first track plates and second track plates along the radial direction of the through hole. Second installation grooves are vertically penetrated through the bottom of the inner wall of the second sealing shell corresponding to the position of the first installation groove. First sliding rods are vertically and fixedly connected to the upper ends of the sliders. The first sliding rods all enter the interior of the second sealing shell through the second installation grooves. Trigger plates are respectively arranged at the bottom of the interior of the second sealing shell corresponding to the positions of the first sliding rods. The trigger plates are respectively rotatably connected to the second sealing shell with the through hole as the axis. Arc-shaped rods are fixedly connected between adjacent trigger plates. The arc-shaped rods are fixedly connected to a rotating ring. A driving device is externally connected to the rotating ring. The driving device is used to drive the rotating ring to rotate. First sliding grooves are vertically penetrated through the trigger plates. The first sliding grooves are composed of a first sliding groove section and a second sliding groove section. The trajectory of the first sliding groove section gradually approaches the through hole in the clockwise direction. The trajectory of the second sliding groove section is an arc concentric with the through hole. The first sliding rod is slidably connected to the first sliding groove.

[0010] As a further solution of the present invention, a sealing sleeve is fixedly connected to the upper end of the film pipe sleeve. A sealing groove is vertically formed at the lower end of the second sealing shell outside the first installation groove. The sealing sleeve can be hermetically and fixedly connected to the sealing groove.

[0011] As a further solution of the present invention, the steering mechanism includes three second sliding grooves respectively formed on the three trigger plates. The second sliding grooves are composed of a third sliding groove section and a fourth sliding groove section. The third sliding groove section corresponds to one end of the first sliding groove section and is parallel to the first sliding groove section. The fourth sliding groove section corresponds to the second sliding groove section and gradually approaches the through hole. First rotating shafts and second rotating shafts are respectively fixedly connected to the upper ends of the arc-shaped pipe sleeve. The first rotating shaft is rotatably connected to the slider. The second rotating shaft is rotatably connected to a connecting rod. The connecting rod is slidably connected to the upper end of the slider. A second sliding rod is vertically and fixedly connected to the upper end of the connecting rod. The second sliding rod is slidably connected to the second sliding groove. When the first sliding rod is located at the junction of the first sliding groove section and the second sliding groove section, the corresponding second sliding rod is located at the junction of the third sliding groove section and the fourth sliding groove section.

[0012] As a further solution of the present invention, the disassembly mechanism includes a third installation groove opened on the side of the first installation groove located on the side of the second track plate. The first track plate is fixed, and the second track plate is slidably connected to the third installation groove. An elastic telescopic rod is fixedly connected between the second track plate and the side wall of the third installation groove. On the side of the first track plate and the second track plate close to the slider, there are both upper flat and lower inclined clamping strips. Corresponding to the positions of the clamping strips, the slider is provided with clamping grooves, and the clamping strips and the clamping grooves are engaged with each other. The part of the upper end of the second track plate located in the second installation groove is fixedly connected with a trigger block. An installation ring is vertically and elastically slidably connected to the inner wall of the second sealing shell. A limiting rod is fixedly connected to the inner wall of the installation ring, and the limiting rod is fixedly connected with a trigger ring. Above the trigger block, the trigger ring is fixedly connected with a first wedge block, and the first wedge block is used to squeeze the trigger block into the third installation groove. Two symmetrical avoidance grooves are opened on the side wall of the second sealing shell, and installation blocks are fixedly connected to the outer wall of the second sealing shell at the positions of the avoidance grooves. A second wedge block is elastically slidably connected to the installation block, and a button is fixedly connected to one end of the second wedge block away from the second sealing shell. The second wedge block is used to squeeze the installation ring downward, and a limiting mechanism is arranged in the second sealing shell; the limiting mechanism is used to enable the first wedge block to vertically press down only when the slider is in a fixed position.

[0013] As a further solution of the present invention, the limiting mechanism includes a limiting ring, the limiting ring is fixedly connected to the upper end of the rotating ring, and the limiting ring is provided with a through groove for accommodating the limiting rod.

[0014] A method for using a variable-diameter sleeve with a driving structure is as follows:

[0015] S1. During operation, first, control the three arc-shaped sleeves to rotate around an axis with one side as the axis through the steering mechanism, so as to facilitate the sleeving of the film sleeve on the outer walls of the three arc-shaped sleeves.

[0016] S2. Then, sleeved the film sleeve on the outer walls of the three arc-shaped sleeves and make the upper end of the film sleeve be hermetically connected to the lower end of the second sealing shell.

[0017] S3. Then, insert the device sleeved with the film sleeve into the patient's body, and according to the surgical requirements, change the cross-sectional area size of the channel jointly formed by the three arc-shaped sleeves.

[0018] S4. When the operation is completed, first remove the film sleeve, and then quickly disassemble the arc-shaped sleeve from the lower end of the second sealing shell for cleaning and disinfection; after cleaning, reinstall the arc-shaped sleeve on the device for the next use.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The present invention controls the radial movement of three arc-shaped tube sleeves and cooperates with a thin film tube sleeve to seal the gaps between the three arc-shaped tube sleeves, enabling the device to adapt to surgeries with different requirements. At the same time, it can also adjust the inner diameter appropriately according to the surgical situation, making the surgery more flexible.

[0021] The present invention sets a limiting mechanism to enable the disassembly of the arc-shaped tube sleeve to be carried out more stably, avoiding the arc-shaped tube sleeve from detaching during use.

[0022] When the first sliding rod moves to the end of the second chute section in the present invention, the trigger ring can drive the first wedge block to move downward. The corresponding slider is located at the ends of the first track plate and the second track plate, so that the alignment of the limiting rod with the through groove is carried out through the end of the second chute section. The positioning between the first sliding rod and the second sliding rod on the slider and the trigger plate is carried out through the ends of the first track plate and the second track plate, enabling the device to have a stable positioning method for disassembly and assembly, and making the use of the device more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the front cross-sectional structure of the present invention;

[0025] Figure 3 is Figure 2 an enlarged schematic diagram of the structure at A in

[0026] Figure 4 is a top view schematic diagram after removing the first sealing shell and the thin film tube sleeve;

[0027] Figure 5 is Figure 4 an enlarged schematic diagram of the structure at B in

[0028] Figure 6 is Figure 5 a schematic diagram of the structure after removing the mounting ring, the limiting rod, the trigger ring and the first wedge block;

[0029] Figure 7 is Figure 6 an enlarged schematic diagram of the structure at C in

[0030] Figure 8 is Figure 6 a half-sectional schematic diagram after removing the trigger plate, the arc-shaped rod and the rotating ring;

[0031] Figure 9 is a schematic diagram of the method flow of the present invention.

[0032] In the drawings, the list of components represented by each reference numeral is as follows:

[0033] The first sealing shell 11, the second sealing shell 12, the thin film sleeve 13, the arc-shaped sleeve 14, the slider 21, the first installation groove 22, the first track plate 23, the second track plate 24, the second installation groove 25, the first sliding rod 26, the trigger plate 27, the arc-shaped rod 28, the rotating ring 29, the first chute 210, the first chute section 2101, the second chute section 2102, the sealing sleeve 31, the sealing groove 32, the first rotating shaft 41, the second rotating shaft 42, the second chute 43, the third chute section 431, the fourth chute section 432, the connecting rod 44, the second sliding rod 45, the third installation groove 51, the elastic telescopic rod 52, the trigger block 53, the installation ring 54, the limiting rod 55, the trigger ring 56, the first wedge-shaped block 57, the avoidance groove, the installation block 59, the second wedge-shaped block 510, the button 511, the limiting ring 61, the through groove 62. Detailed implementation manners

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0035] Please refer to Figures 1 - 9 , the present invention provides a technical solution: a variable-diameter sleeve system with a driving structure, including a first sealing shell 11, a second sealing shell 12 and a thin film sleeve 13. The first sealing shell 11 is fixedly connected to the upper end of the second sealing shell 12. A through hole is provided at the axial center position of the first sealing shell 11 and the second sealing shell 12, and the through hole is a passage for surgical instruments to enter and exit. The through hole in the first sealing shell 11 is externally connected with a sealing mechanism, and the sealing mechanism is used to seal the through hole. The thin film sleeve 13 can be hermetically connected to the lower end of the second sealing shell 12. It further includes three arc-shaped sleeves 14. The three arc-shaped sleeves 14 are radially slidably arranged at the lower end of the second sealing shell 12 and are coaxial with the through hole. The three arc-shaped sleeves 14 are jointly sleeved with the thin film sleeve 13. The three arc-shaped sleeves 14 and the thin film sleeve 13 jointly form a passage for surgical instruments to enter and exit;

[0036] A steering mechanism is arranged at the upper end of the arc-shaped sleeve 14, and the steering mechanism is used to rotate the arc-shaped sleeve 14 around one side as the axis;

[0037] A disassembly mechanism is arranged in the second sealing shell 12, and the disassembly mechanism is used for quickly disassembling and assembling the arc-shaped sleeve 14;

[0038] A driving mechanism is used to control the radial movement of the arc-shaped sleeve 14 and provide driving force for the steering mechanism.

[0039] First, control the three arc-shaped tube sleeves 14 to rotate around an axis with one side as the center through the steering mechanism, so as to contract the cross-sectional area formed by the three arc-shaped tube sleeves 14 together, facilitating the sleeving of the thin film tube sleeve 13 on the outer walls of the three arc-shaped tube sleeves 14; then sleeve the thin film tube sleeve 13 on the outer walls of the three arc-shaped tube sleeves 14 and seal the upper end of the thin film tube sleeve 13 with the lower end of the second sealing shell 12; then insert the device sleeved with the thin film tube sleeve 13 into the patient's body, and according to the surgical requirements, control the three arc-shaped tube sleeves 14 to move radially through the driving mechanism to change the cross-sectional area of the channel formed by the three arc-shaped tube sleeves 14 together; when the operation is completed, first remove the thin film tube sleeve 13, and then quickly disassemble the arc-shaped tube sleeve 14 from the lower end of the second sealing shell 12 through the disassembly mechanism to facilitate the cleaning and disinfection of the arc-shaped tube sleeve 14; after cleaning, reinstall the arc-shaped tube sleeve 14 on the device for the next use.

[0040] In the present invention, by controlling the three arc-shaped tube sleeves 14 to move radially and cooperating with the thin film tube sleeve 13 to seal the gaps between the three arc-shaped tube sleeves 14, the device can adapt to surgeries with different requirements, and at the same time, the inner diameter can be adjusted appropriately according to the surgical situation, making the surgery more flexible.

[0041] As a further solution of the present invention, the driving mechanism includes three sliders 21 respectively connected to the upper ends of the arc-shaped tube sleeves 14. At the positions corresponding to the arc-shaped tube sleeves 14 at the lower end of the second sealing shell 12, first installation grooves 22 are respectively opened. On both side walls of the first installation groove 22, a first track plate 23 and a second track plate 24 are respectively arranged. The sliders 21 are respectively slidably connected to the corresponding first track plate 23 and second track plate 24 along the radial direction of the through hole. At the positions corresponding to the first installation grooves 22 at the bottom of the inner wall of the second sealing shell 12, second installation grooves 25 are vertically and penetratingly opened. The upper ends of the sliders 21 are vertically and fixedly connected with first sliding rods 26. The first sliding rods 26 all enter the inside of the second sealing shell 12 through the second installation grooves 25. Trigger plates 27 are respectively arranged at the positions corresponding to the first sliding rods 26 at the bottom inside the second sealing shell 12. The trigger plates 27 are respectively rotatably connected to the second sealing shell 12 with the through hole as the axis. Arc-shaped rods 28 are fixedly connected between adjacent trigger plates 27. The arc-shaped rods 28 are fixedly connected with a rotating ring 29. The rotating ring 29 is externally connected with a driving device for driving the rotating ring 29 to rotate. The trigger plates 27 are vertically and penetratingly opened with first sliding grooves 210. The first sliding grooves 210 are composed of a first sliding groove section 2101 and a second sliding groove section 2102. The trajectory of the first sliding groove section 2101 gradually approaches the through hole in the clockwise direction, and the trajectory of the second sliding groove section 2102 is an arc concentric with the through hole; the first sliding rods 26 are slidably connected with the first sliding grooves 210.

[0042] The driving device controls the rotary ring 29 to rotate clockwise or counterclockwise, driving the trigger plate 27 to rotate correspondingly. Further, the first sliding rod 26 moves away from or closer to the through-hole in the first chute section 2101. Further still, the first sliding rod 26 drives the arc-shaped sleeve 14 to move radially away from or closer to the through-hole through the slider 21.

[0043] As a further aspect of the present invention, a sealing sleeve 31 is fixedly connected to the upper end of the film sleeve 13. A sealing groove 32 is vertically formed outside the first installation groove 22 at the lower end of the second sealing shell 12. The sealing sleeve 31 can be fixedly and sealingly connected to the sealing groove 32.

[0044] During the process of sleeving the film sleeve 13 on the outer wall of the arc-shaped sleeve 14, the sealing sleeve 31 is fixedly and sealingly connected to the sealing groove 32, so that the gap between the lower end of the second sealing shell 12 and the arc-shaped sleeve 14 is sealed by the sealing sleeve 31 and the film sleeve 13.

[0045] As a further aspect of the present invention, the steering mechanism includes three second chutes 43 respectively formed on the three trigger plates 27. The second chute 43 is composed of a third chute section 431 and a fourth chute section 432. The third chute section 431 corresponds to one end of the first chute section 2101 and is parallel to the first chute section 2101. The fourth chute section 432 corresponds to the second chute section 2102 and gradually approaches the through-hole. The upper ends of the arc-shaped sleeves 14 are fixedly connected with a first rotating shaft 41 and a second rotating shaft 42 respectively. The first rotating shaft 41 is rotatably connected with the slider 21. The second rotating shaft 42 is rotatably connected with a connecting rod 44. The connecting rod 44 is slidably connected with the upper end of the slider 21. The upper end of the connecting rod 44 is vertically fixedly connected with a second sliding rod 45. The second sliding rod 45 is slidably connected with the second chute 43. When the first sliding rod 26 is located at the junction of the first chute section 2101 and the second chute section 2102, the corresponding second sliding rod 45 is located at the junction of the third chute section 431 and the fourth chute section 432.

[0046] When the first sliding rod 26 is in the first chute section 2101, the corresponding second sliding rod 45 is in the third chute section 431. During this process, since the third chute section 431 is parallel to the first chute section 2101, the first sliding rod 26 and the second sliding rod 45 are relatively stationary. When the first sliding rod 26 moves to the second chute section 2102, at this time the first sliding rod 26 is closest to the through-hole. Correspondingly, the three arc-shaped sleeves 14 are tightened. At this time, as the rotary ring 29 rotates clockwise, the second sliding rod 45 moves clockwise along the fourth chute section 432. The second sliding rod 45 gradually approaches the through-hole. Further, the second sliding rod 45 drives the second rotating shaft 42 to move towards the axis direction of the through-hole through the connecting rod 44, causing the arc-shaped sleeve 14 to rotate, and further reducing the cross-sectional area of the three arc-shaped sleeves 14, making it easier to sleeve the film sleeve 13 on the outer walls of the three arc-shaped sleeves 14.

[0047] As a further solution of the present invention, the disassembly mechanism includes a third installation groove 51 opened on the side of the first installation groove 22 located on the side of the second track plate 24, the first track plate 23 is fixed, the second track plate 24 is slidably connected to the third installation groove 51, and an elastic telescopic rod 52 is fixedly connected between the side wall of the second track plate 24 and the third installation groove 51. On the side of the first track plate 23 and the second track plate 24 close to the slider 21, there are both upper flat and lower inclined clamping strips, and the slider 21 is provided with clamping grooves corresponding to the positions of the clamping strips, and the clamping strips and the clamping grooves are mutually clamped. A trigger block 53 is fixedly connected to the upper end of the second track plate 24 located in the second installation groove 25. An installation ring 54 is vertically elastically slidably connected to the inner wall of the second sealing shell 12. A limiting rod 55 is fixedly connected to the inner wall of the installation ring 54, and a trigger ring 56 is fixedly connected to the limiting rod 55. First wedge-shaped blocks 57 are fixedly connected above the trigger ring 56 and the trigger block 53. The first wedge-shaped blocks 57 are used to squeeze the trigger block 53 into the third installation groove 51. Two symmetrical avoidance grooves are opened on the side wall of the second sealing shell 12, and installation blocks 59 are fixedly connected to the outer wall of the second sealing shell 12 at the positions of the avoidance grooves. Second wedge-shaped blocks 510 are elastically slidably connected to the installation blocks 59, and buttons 511 are fixedly connected to the ends of the second wedge-shaped blocks 510 away from the second sealing shell 12. The second wedge-shaped blocks 510 are used to squeeze the installation ring 54 downward, and a limiting mechanism is arranged in the second sealing shell 12; the limiting mechanism is used to enable the first wedge-shaped blocks 57 to vertically press down only when the slider 21 is in a fixed position.

[0048] After the slider 21 moves to a fixed position, the two buttons 511 are squeezed towards the second sealing shell 12, so that the second wedge-shaped blocks 510 move into the second sealing shell 12, and then the second wedge-shaped blocks 510 squeeze the installation ring 54 downward. The installation ring 54 drives the trigger ring 56 to move downward. Further, the trigger ring 56 drives the first wedge-shaped blocks 57 to move downward. The first wedge-shaped blocks 57 squeeze the second track plate 24 into the third installation groove 51 through the trigger block 53, so that the second track plate 24 is disengaged from the clamping with the slider 21, and then the slider 21 and the arc-shaped pipe sleeve 14 can be taken off from the lower end of the second sealing shell 12. Then, after the arc-shaped pipe sleeve 14 is cleaned, the slider 21 is directly inserted between the first track plate 23 and the second track plate 24. Using the inclined surface at the lower end of the clamping strip on the second track plate 24, the slider 21 is inserted between the first track plate 23 and the second track plate 24, so that the clamping groove on the slider 21 is re-clamped with the clamping strips on the first track plate 23 and the second track plate 24.

[0049] By setting the limiting mechanism in the present invention, the disassembly of the arc-shaped pipe sleeve 14 can be carried out more stably, and the arc-shaped pipe sleeve 14 is prevented from detaching during use.

[0050] As a further solution of the present invention, the limiting mechanism includes a limiting ring 61, which is fixedly connected to the upper end of the rotating ring 29. The limiting ring 61 is provided with a through groove 62 for accommodating the limiting rod 55.

[0051] When the first sliding rod 26 moves to the end of the second chute section 2102, the corresponding limiting rod 55 is aligned with the through groove 62. At this time, the limiting rod 55 can move downward and enter the through groove 62. Further, the mounting ring 54 and the trigger ring 56 connected to the limiting rod 55 can move downward. At this time, press the button 511, so that the mounting ring 54 drives the first wedge block 57 to move downward through the trigger ring 56, and the second track plate 24 enters the third mounting groove 51, completing the disassembly of the slider 21 and the arc-shaped sleeve 14.

[0052] In the present invention, when the first sliding rod 26 moves to the end of the second chute section 2102, the trigger ring 56 can drive the first wedge block 57 to move downward. The corresponding slider 21 is located at the ends of the first track plate 23 and the second track plate 24. The positioning of the limiting rod 55 and the through groove 62 is carried out through the end of the second chute section 2102. The positioning between the first sliding rod 26 and the second sliding rod 45 on the slider 21 and the trigger plate 27 is carried out through the ends of the first track plate 23 and the second track plate 24, so that both the disassembly and assembly of the device have a stable positioning method, making the use of the device more stable.

[0053] A method for using a variable-diameter sleeve with a drive structure is as follows:

[0054] S1. During operation, first, control the three arc-shaped sleeves 14 to rotate around an axis on one side through the steering mechanism, facilitating the sleeving of the film sleeve 13 on the outer walls of the three arc-shaped sleeves 14.

[0055] S2. Then, sleev the film sleeve 13 on the outer walls of the three arc-shaped sleeves 14 and seal the upper end of the film sleeve 13 with the lower end of the second sealing shell 12.

[0056] S3. Then, insert the device sleeved with the film sleeve 13 into the patient's body, and change the cross-sectional area of the channel jointly formed by the three arc-shaped sleeves 14 according to the surgical requirements.

[0057] S4. When the operation is completed, first remove the film sleeve 13, and then quickly disassemble the arc-shaped sleeve 14 from the lower end of the second sealing shell 12 for cleaning and disinfection; after cleaning, reinstall the arc-shaped sleeve 14 on the device for the next use.

Claims

1. A variable diameter sleeve system with a driving structure, comprising a first sealing shell (11), a second sealing shell (12) and a thin film sleeve (13), wherein the first sealing shell (11) is fixedly connected to the upper end of the second sealing shell (12), through holes are arranged at the axial positions of the first sealing shell (11) and the second sealing shell (12), the through holes are inlet and outlet passages of surgical instruments, the through holes in the first sealing shell (11) are externally connected to a sealing mechanism, the sealing mechanism is used to seal the through holes, the thin film sleeve (13) can be sealed and connected to the lower end of the second sealing shell (12), and is characterized in that: It also comprises three arc-shaped tube sleeves (14), the three arc-shaped tube sleeves (14) are radially slidably arranged at the lower end of the second sealing shell (12) and are coaxial with the through hole, the three arc-shaped tube sleeves (14) are sleeved together with the thin film tube sleeve (13), and the three arc-shaped tube sleeves (14) and the thin film tube sleeve (13) together form a passage for surgical instruments to enter and exit; A steering mechanism, the steering mechanism being arranged at the upper end of the arc-shaped tube sleeve (14), the steering mechanism being used to cause the arc-shaped tube sleeve (14) to rotate with one side as the axial axis; A disassembly mechanism, the disassembly mechanism being arranged in the second sealing shell (12), the disassembly mechanism being used for quickly disassembling and assembling the arc-shaped pipe sleeve (14); A driving mechanism, the driving mechanism being used to control the radial movement of the arc-shaped sleeve (14) and to provide a driving force for the steering mechanism; The driving mechanism comprises three sliders (21) respectively connected to the upper ends of the arc-shaped tube sleeves (14); a first mounting groove (22) is provided at the lower end of the second sealing shell (12) at a position corresponding to the arc-shaped tube sleeves (14); a first track plate (23) and a second track plate (24) are respectively provided on the two side walls of the first mounting groove (22); the sliders (21) are respectively connected to the corresponding first track plate (23) and the second track plate (24) in a radially sliding manner along the through hole; a second mounting groove (25) is vertically penetrated at the bottom of the inner wall of the second sealing shell (12) at a position corresponding to the first mounting groove (22); a first sliding rod (26) is vertically fixedly connected to the upper ends of the sliders (21); the first sliding rod (26) enters the interior of the second sealing shell (12) through the second mounting groove (25); the bottom of the second sealing shell (12) corresponds to the first sliding rod. A trigger plate (27) is provided at the position of the rod (26), and the trigger plate (27) is rotatably connected to the second sealing shell (12) with the through hole as the axis. An arc rod (28) is fixedly connected between adjacent trigger plates (27), and the arc rod (28) is fixedly connected to a rotating ring (29). The rotating ring (29) is externally connected to a driving device, and the driving device is used to drive the rotating ring (29) to rotate. The trigger plates (27) are vertically penetrated by a first sliding groove (210), and the first sliding groove (210) is composed of a first sliding groove section (2101) and a second sliding groove section (2102). The trajectory of the first sliding groove section (2101) gradually approaches the through hole in a clockwise direction, and the trajectory of the second sliding groove section (2102) is a circular arc concentric with the through hole; the first sliding rod (26) is slidably connected to the first sliding groove (210); The upper end of the film tube sleeve (13) is fixedly connected to a sealing sleeve (31); the lower end of the second sealing shell (12) is vertically provided with a sealing groove (32) outside the first installation groove (22); and the sealing sleeve (31) can be fixedly connected to the sealing groove (32) in a sealing manner; The steering mechanism comprises three second slide grooves (43) respectively provided on three trigger plates (27), the second slide groove (43) being composed of a third slide groove section (431) and a fourth slide groove section (432), the third slide groove section (431) corresponding to one end of the first slide groove section (2101) and being parallel to the first slide groove section (2101), the fourth slide groove section (432) corresponding to the second slide groove section (2102) and gradually approaching the through hole, the upper end of the arc-shaped pipe sleeve (14) being fixedly connected to the first rotating shaft (41) and the second rotating shaft (42), the first rotating shaft (41) and the second rotating shaft (42) being arranged on the upper end of the arc-shaped pipe sleeve (14), The shaft (41) is rotatably connected to the slider (21); the second rotating shaft (42) is rotatably connected to a connecting rod (44); the connecting rod (44) is slidably connected to the upper end of the slider (21); the upper end of the connecting rod (44) is vertically fixedly connected to a second sliding rod (45); the second sliding rod (45) is slidably connected to the second sliding groove (43); when the first sliding rod (26) is located at the junction of the first sliding groove section (2101) and the second sliding groove section (2102), the corresponding second sliding rod (45) is located at the junction of the third sliding groove section (431) and the fourth sliding groove section (432).

2. A reducer sleeve system with a driving structure according to claim 1, characterized in that: The disassembly mechanism comprises a third mounting groove (51) provided in the first mounting groove (22) and located on the side of the second track plate (24); the first track plate (23) is fixed; the second track plate (24) is slidably connected to the third mounting groove (51); an elastic telescopic rod (52) is fixedly connected between the side walls of the second track plate (24) and the third mounting groove (51); a clamping strip which is flat on the top and inclined on the bottom is provided on the side of the first track plate (23) and the second track plate (24) close to the slider (21); a clamping groove is provided at the position of the slider (21) corresponding to the clamping strip; the clamping strip and the clamping groove are mutually engaged; a portion of the upper end of the second track plate (24) located in the second mounting groove (25) is fixedly connected to a trigger block (53); a mounting ring (54) is vertically elastically slidably connected to the inner wall of the second sealing shell (12); a limiting rod (55) is fixedly connected to the inner wall of the mounting ring (54); the limiting rod (55) is fixedly connected to the inner wall of the limiting rod (55); The positioning rod (55) is fixedly connected to a trigger ring (56); the trigger ring (56) is located above the trigger block (53) and is fixedly connected to a first wedge block (57); the first wedge block (57) is used to press the trigger block (53) into the third mounting groove (51); the side wall of the second sealing shell (12) is provided with two symmetrical avoidance grooves; the outer wall of the second sealing shell (12) is fixedly connected to a mounting block (59) located at the avoidance grooves; the mounting block (59) is elastically slidably connected to a second wedge block (510); one end of the second wedge block (510) away from the second sealing shell (12) is fixedly connected to a button (511); the second wedge block (510) is used to press the mounting ring (54) downward; a limiting mechanism is provided in the second sealing shell (12); the limiting mechanism is used to enable the first wedge block (57) to be pressed vertically downward only when the slider (21) is in a fixed position.

3. The reducer sleeve system with a driving structure according to claim 2, characterized in that: The limiting mechanism comprises a limiting ring (61), the limiting ring (61) is fixedly connected to the upper end of the rotating ring (29), and the limiting ring (61) is provided with a through groove (62), and the through groove (62) is used to accommodate the limiting rod (55).

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