A drainage positioning device for thoracic surgery

Abstract

The present invention discloses an intracavitary drainage positioning device for extrathoracic surgery, comprising an intracavitary positioning component, the intracavitary positioning component comprising a positioning catheter, the positioning catheter being connected to a thickened tube, a miniature camera being installed in the thickened tube, and a protective member for protecting the miniature camera being installed on the outer side of the miniature camera. The intracavitary positioning component positions the positioning catheter intracavitarily through the action of the miniature camera. This intracavitary drainage positioning device for extrathoracic surgery, by being provided with the intracavitary positioning component, solves the problem in the prior art that postoperative patients or patients who do not require surgery need CT or puncture positioning when simply extracting pleural effusion, resulting in troublesome operation.

Description

Technical Field

[0001] The present invention relates to the technical field of intracavitary drainage positioning devices, in particular to an intracavitary drainage positioning device for thoracic surgery. Background Art

[0002] In clinical medical treatment, thoracic surgery leaves a large cavity after removing part or all of the organs, which is prone to bleeding and infection. If pericardial effusion progresses rapidly and accumulates a lot, it can cause pericardial tamponade and endanger the patient's life. Therefore, it is necessary to extract the fluid in the patient's chest cavity.

[0003] Currently, closed thoracic and abdominal drainage is a widely used technique in surgery, oncology, and critical care medicine. It is an effective method for treating pleural and abdominal effusions. However, due to the long course of treatment for the underlying cause and the rapid accumulation of effusions, patients with moderate or larger effusions often require multiple drainages. During this drainage process, the position of the drainage tube must be accurately located. Common methods for this are CT scans and punctures. However, due to the high number of drainages required, these methods are cumbersome and painful for the patient, hindering treatment. To address this issue, we propose a drainage positioning device for intracavitary thoracic surgery. Summary of the Invention

[0004] The purpose of the present invention is to provide a drainage positioning device for extrathoracic surgery to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intracavitary drainage positioning device for extrathoracic surgery, comprising an intracavitary positioning component, the intracavitary positioning component comprising a positioning catheter, the positioning catheter being connected to a thickened tube, a miniature camera being installed in the thickened tube, a protective member for protecting the miniature camera being installed on the outside of the miniature camera, the intracavitary positioning component positions the positioning catheter intracavitarily through the action of the miniature camera; an extracavitary positioning component, the extracavitary positioning component comprising a suction cup, the extracavitary positioning component positions the positioning catheter extracavitarily through the action of the suction cup, the extracavitary positioning component further comprising a stretching member installed on the outside of the suction cup, the stretching member being used to stretch the patient's skin, which is conducive to positioning the patient's intracavitary and extracavitary.

[0006] Preferably, the protective part includes a protective cover installed in the thickened tube and located outside the miniature camera, and both sides of the top of the protective cover are fixedly connected to connecting blocks, the connecting block is rotatably connected to a rotating column, the rotating column is fixedly connected to a rotating block, the rotating block is fixedly connected to a sealing plate, the sealing plate is fixedly connected to a connecting column, the connecting column is fixedly connected to an elastic rope, one end of the elastic rope is fixedly connected to a fixed column fixedly connected to the protective cover, and the miniature camera is connected to a pneumatic part for pushing the miniature camera to move, which is beneficial to protecting the miniature camera and avoiding contamination that may cause unclear visualization of the fluid accumulation in the patient's chest cavity.

[0007] Preferably, the pneumatic part includes an air supply pipe connected to the protective cover and a piston plate fixedly connected to the miniature camera, the piston plate is slidably connected to the protective cover, and one end of the air supply pipe extends to the top position of the positioning catheter and is connected to a bellows, and a first reset spring is installed in the bellows, which is conducive to driving the miniature camera to move, thereby facilitating viewing the internal situation of the chest cavity.

[0008] Preferably, the extracavitary positioning assembly includes an outer shell, a pressure tube connected to the suction cup is installed in the outer shell, a limiting strip is fixedly connected to the inner wall of the pressure tube, a threaded sleeve slidably connected to the limiting strip is slidably connected to the pressure tube, a movable block is fixedly connected to the bottom end of the threaded sleeve, and a threaded rod is threadedly connected to the threaded sleeve, the top end of the threaded rod is fixedly connected to a turning handle, and a through hole is provided at the top end of the pressure tube, and a fixing part for fixing the positioning catheter is connected to the turning handle, and the positioning catheter passes through the turning handle, the threaded rod and the suction cup, so as to facilitate positioning of the positioning catheter.

[0009] Preferably, the fixing member includes a threaded sleeve fixedly connected to the handle and installed on the outside of the positioning catheter, the top of the threaded sleeve is fixedly connected to a fixing plate, and the threaded sleeve is threadedly connected to a threaded block, and a conical groove is provided in the threaded block, which is conducive to fixing the positioning catheter.

[0010] Preferably, the stretching member includes multiple groups of sliders slidably connected to the shell, the bottom end of the slider is fixedly connected to a connecting rod slidably connected to the shell, one end of the connecting rod is fixedly connected to an anti-sliding block, and one side of the slider is fixedly connected to a second spring fixedly connected to the shell, and the slider is connected to a sliding member connected to the threaded rod, which is conducive to stretching the patient's skin and making the skin fit tightly with the suction cup.

[0011] Preferably, the sliding member includes a connecting ring fixedly connected to the threaded rod, a connecting rod fixedly connected to the connecting ring, a fixing ring fixedly connected to the top of the connecting rod, a plurality of sets of columns fixedly connected to the fixing ring, a connecting seat fixedly connected to the bottom end of the column, an extrusion plate fixedly connected to the connecting seat, a rotating rod rotatably connected to the slider is installed on one side of the extrusion plate, which is conducive to driving the anti-sliding block to slide, thereby promoting skin stretching.

[0012] Preferably, the outer surfaces of the turning handle and the threaded block are provided with anti-slip grooves to increase the friction during rotation, thereby facilitating the rotation of the turning handle and the threaded block.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention is provided with an intracavitary positioning component. Therefore, when the patient is drained, the positioning catheter is inserted into the patient's chest cavity. During the operation, the bellows is pressed, so that the air pressure in the bellows is squeezed into the protective cover through the air supply pipe. Therefore, the piston plate is pushed to move by the action of the air pressure, thereby driving the miniature camera to move. Therefore, the miniature camera will push the sealing plate open, so that the miniature camera extends out of the protective cover, thereby observing the environment in the chest cavity, thereby facilitating the positioning of the insertion position of the positioning catheter. After the insertion position of the positioning catheter is determined, the bellows is released, so that the miniature camera is pushed out of the protective cover. The action of a spring resets the bellows, and the air pressure in the protective cover is sucked back into the bellows through the action of the air supply pipe, thereby driving the piston plate to move in the opposite direction and reset, thereby driving the micro camera to reset, thereby causing the micro camera to retract into the protective cover. During the retraction of the micro camera, the two sets of sealing plates will reset and seal the protective cover through the action of the elastic rope, thereby protecting the micro camera to avoid contamination affecting viewing. Therefore, the problem in the prior art that postoperative patients or patients who do not require surgery need CT or puncture positioning when simply extracting the effusion in the pleural cavity, which causes operational inconvenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the structure of the intracavity positioning component of the present invention;

[0017] Figure 3 For the present invention Figure 2 Schematic diagram of the structure of the middle A area;

[0018] Figure 4 This is a schematic diagram of the partial structure of the intracavitary positioning component of the present invention;

[0019] Figure 5For the present invention Figure 4 Schematic diagram of the structure of the middle B area;

[0020] Figure 6 This is a schematic diagram of the structure of the extracavitary positioning assembly of the present invention;

[0021] Figure 7 This is a schematic diagram of the partial structure of the extracavitary positioning assembly of the present invention;

[0022] Figure 8 For the present invention Figure 7 Schematic diagram of the structure of the middle C area;

[0023] Figure 9 This is a schematic diagram of the disassembled structure of the threaded rod, threaded sleeve and pressure pipe connected to each other in the present invention;

[0024] Figure 10 This is a schematic diagram of the internal structure of the housing of the present invention;

[0025] Figure 11 For the present invention Figure 10 Schematic diagram of the structure of the middle D area;

[0026] Figure 12 For the present invention Figure 10 Schematic diagram of the structure from above;

[0027] Figure 13 This is a schematic diagram of the connection structure between the positioning catheter, the turning handle, the threaded rod and the suction cup of the present invention.

[0028] In the figure: 1-intracavitary positioning assembly; 2-extracavitary positioning assembly; 3-positioning catheter; 4-thickening tube; 5-micro camera; 6-protective element; 7-bellows; 8-suction cup; 9-tension member; 10-protective cover; 11-connecting block; 12-rotating column; 13-rotating block; 14-sealing plate; 15-connecting column; 16-elastic rope; 17-fixing column; 18-pneumatic element; 19-air supply pipe; 20-piston plate; 21-first spring; 22-housing; 23-pressure Tube; 24-limiting bar; 25-movable block; 26-threaded sleeve; 27-threaded rod; 28-turn handle; 29-through hole; 30-fixing piece; 31-threaded sleeve; 32-fixing plate; 33-threaded block; 34-tapered groove; 35-slider; 36-connecting rod; 37-second spring; 38-anti-slider; 39-sliding piece; 40-connecting ring; 41-connecting rod; 42-fixing ring; 43-column; 44-connecting seat; 45-extrusion plate; 46-rotating rod. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-13 The present invention provides a technical solution: a device for positioning intracavitary drainage during extrathoracic surgery, comprising an intracavitary positioning component 1, wherein the intracavitary positioning component 1 includes a positioning catheter 3, the positioning catheter 3 is connected to a thickened tube 4, a miniature camera 5 is installed in the thickened tube 4, and a protective member 6 for protecting the miniature camera 5 is installed on the outside of the miniature camera 5, the intracavitary positioning component 1 positions the positioning catheter 3 intracavitarily through the action of the miniature camera 5; an extracavitary positioning component 2, the extracavitary positioning component 2 includes a suction cup 8, the extracavitary positioning component 2 positions the positioning catheter 3 extracavitarily through the action of the suction cup 8, the extracavitary positioning component 2 also includes a stretching member 9 installed on the outside of the suction cup 8, the stretching member 9 is used to stretch the patient's skin, and the action of the intracavitary positioning component 1 facilitates observation of the situation in the patient's chest cavity, thereby facilitating the insertion of the positioning catheter 3 into a suitable position, thereby positioning the positioning catheter 3 intracavitarily, and after the intracavitary positioning is completed, the positioning catheter 3 outside the chest cavity is positioned and fixed by the action of the extracavitary positioning component 2.

[0031] The protective member 6 includes a protective cover 10 installed in the thickened tube 4 and located outside the miniature camera 5. Both sides of the top of the protective cover 10 are fixedly connected to a connecting block 11. A rotating column 12 is rotatably connected to the connecting block 11. A rotating block 13 is fixedly connected to the rotating column 12. A sealing plate 14 is fixedly connected to the rotating block 13. A connecting column 15 is fixedly connected to the sealing plate 14. An elastic rope 16 is fixedly connected to the connecting column 15. One end of the elastic rope 16 is fixedly connected to a fixing column 17 fixedly connected to the protective cover 10. The miniature camera 5 is connected to a useful The pneumatic part 18 that drives the micro camera 5 to move protects the micro camera 5 through the action of the protective cover 10 to prevent the effusion in the chest cavity from contaminating the micro camera 5 during drainage, causing the micro camera 5 to be unable to watch. The micro camera 5 is driven to move by the pneumatic part 18, so when the micro camera 5 moves, it will push the two sets of sealing plates 14 to rotate open, so that the micro camera 5 extends out of the protective cover 10 to observe the environment in the chest cavity, and after the observation, the micro camera 5 is reset. At this time, the two sets of sealing plates 14 are reset through the action of the elastic rope 16, thereby protecting the micro camera 5.

[0032] The pneumatic part 18 includes an air pipe 19 connected to the protective cover 10 and a piston plate 20 fixedly connected to the micro camera 5. The piston plate 20 is slidably connected to the protective cover 10, and one end of the air pipe 19 extends to the top position of the positioning catheter 3 and is connected to the bellows 7. A reset first spring 21 is installed in the bellows 7. When the micro camera 5 is needed to observe the environment inside the chest cavity, the bellows 7 is pressed at this time, so that the gas in the bellows 7 is squeezed into the protective cover 10 through the air pipe 19, thereby driving the piston plate 20 to move through the action of air pressure, thereby driving the micro camera 5 to move.

[0033] The extracavitary positioning assembly 2 includes an outer shell 22, in which a pressure tube 23 connected to the suction cup 8 is installed. A limiting strip 24 is fixedly connected to the inner wall of the pressure tube 23, and a threaded sleeve 26 slidably connected to the limiting strip 24 is slidably connected to the pressure tube 23. The bottom end of the threaded sleeve 26 is fixedly connected to a movable block 25, and a threaded rod 27 is threadedly connected to the threaded sleeve 26. The top of the threaded rod 27 is fixedly connected to a turning handle 28, and a through hole 29 is provided at the top of the pressure tube 23, and a fixing part 30 for fixing the positioning catheter 3 is connected to the turning handle 28, and the positioning catheter 3 passes through the turning handle 28, the threaded rod 27 and the suction cup 8. By rotating the turning handle 28, the turning handle 28 drives the threaded rod 27 to rotate, and then drives the threaded sleeve 26 to move, and then drives the movable block 25 to move, thereby sucking away the air in the suction cup 8, so that the suction cup 8 is closely fitted to the patient's skin through the principle of atmospheric pressure, thereby fixing the positioning catheter 3.

[0034] The fixing member 30 includes a threaded sleeve 31 fixedly connected to the turning handle 28 and installed on the outside of the positioning catheter 3. The top of the threaded sleeve 31 is fixedly connected to a fixing plate 32, and a threaded block 33 is threadedly connected to the threaded sleeve 31. A tapered groove 34 is provided in the threaded block 33. After the position of the positioning catheter 3 is determined and the suction cup 8 is firmly adsorbed, the threaded block 33 is rotated at this time, so that the fixing plate 32 is squeezed by the action of the tapered groove 34 provided in the threaded block 33, so that the fixing plate 32 squeezes the positioning catheter 3, thereby fixing the positioning catheter 3.

[0035] The stretching member 9 includes multiple groups of sliders 35 slidably connected to the shell 22, the bottom end of the slider 35 is fixedly connected to a connecting rod 36 slidably connected to the shell 22, one end of the connecting rod 36 is fixedly connected to an anti-sliding block 38, and one side of the slider 35 is fixedly connected to a second spring 37 fixedly connected to the shell 22, and a sliding member 39 connected to the threaded rod 27 is connected to the slider 35. When the threaded rod 27 rotates, the sliding member 39 will be driven to run, thereby driving the slider 35 to move, thereby driving the connecting rod 36 to move, and thereby driving the anti-sliding block 38 to move. Therefore, the movement of the anti-sliding block 38 pushes the patient's skin to spread outward, thereby flattening the patient's skin, which is conducive to stable and firm adsorption of the suction cup 8.

[0036] The sliding member 39 includes a connecting ring 40 fixedly connected to the threaded rod 27, a connecting rod 41 fixedly connected to the connecting ring 40, a fixing ring 42 fixedly connected to the top of the connecting rod 41, a plurality of sets of columns 43 fixedly connected to the fixing ring 42, a connecting seat 44 fixedly connected to the connecting seat 44, an extrusion plate 45 fixedly connected to the connecting seat 44, and a rotating rod 46 rotatably connected to the slider 35 is installed on one side of the extrusion plate 45. When the threaded rod 27 rotates, the connecting ring 40 will be driven to rotate, thereby driving the connecting rod 41 to rotate, thereby driving the fixing ring 42 to rotate, thereby driving the column 43 to rotate, thereby driving the connecting seat 44 to rotate, and thereby driving the extrusion plate 45 to rotate. Therefore, the rotating rod 46 is squeezed by the action of the extrusion plate 45, thereby driving the rotating rod 46 to move, thereby driving the slider 35 to move.

[0037] The outer surfaces of the turning handle 28 and the threaded block 33 are both provided with anti-slip grooves to increase the friction during rotation, thereby facilitating the rotation of the turning handle 28 and the threaded block 33 .

[0038] When the patient is draining, the positioning catheter 3 is inserted into the affected chest cavity. During the operation, the bellows 7 is pressed, so that the air pressure in the bellows 7 is squeezed into the protective cover 10 through the air supply pipe 19. Therefore, the piston plate 20 is pushed to move by the air pressure, thereby driving the micro camera 5 to move. Therefore, the micro camera 5 will push the sealing plate 14 open, so that the micro camera 5 extends out of the protective cover 10, so as to observe the environment in the chest cavity, thereby facilitating the positioning of the insertion position of the positioning catheter 3. After the insertion position of the positioning catheter 3 is determined, the bellows 7 is released, so that the bellows 7 is reset by the action of the first spring 21, so it will The air pressure in the protective cover 10 is sucked back into the bellows 7 through the action of the air supply pipe 19, thereby driving the piston plate 20 to move in the opposite direction and reset, thereby driving the micro camera 5 to reset, so that the micro camera 5 is retracted into the protective cover 10. During the retraction of the micro camera 5, the two sets of sealing plates 14 will reset and seal the protective cover 10 through the action of the elastic rope 16, thereby protecting the micro camera 5 to avoid contamination affecting the viewing. The lowest liquid level of the effusion can be observed through the action of the micro camera 5, and then the drainage tube can be connected to drain the effusion. The situation inside the patient's chest cavity can be observed through the action of the micro camera 5 to determine whether the tube can be removed. Therefore, the operation is convenient and can be carried out at a fixed time. After the position is completed, the suction cup 8 is made to fit the patient's skin by pressing the shell 22. At this time, the handle 28 is rotated to drive the threaded rod 27 to rotate, and then the threaded sleeve 26 is driven to move, and then the movable block 25 is driven to move, so that the air in the suction cup 8 is sucked away, and the suction cup 8 is closely fitted to the patient's skin through the principle of atmospheric pressure. In this process, the rotation of the threaded rod 27 will drive the connecting ring 40 to rotate, and then the connecting rod 41 is driven to rotate, and then the fixing ring 42 is driven to rotate, and then the column 43 is driven to rotate, and then the connecting seat 44 is driven to rotate, and then the squeezing plate 45 is driven to rotate. Therefore, the rotating rod 46 is squeezed by the action of the squeezing plate 45, thereby driving the rotating rod 46 to move The movement of the anti-slider 38 pushes the patient's skin outward, thereby flattening the patient's skin, which is conducive to the stable and firm adsorption of the suction cup 8, thereby positioning and fixing the positioning catheter 3. After this operation is completed, the threaded block 33 is twisted, thereby squeezing the fixing plate 32 through the action of the tapered groove 34, so that the fixing plate 32 is tightly fitted into the positioning catheter 3, thereby fixing the positioning catheter 3. (Due to the action of the second spring 37, when the threaded rod 27 is reversed, the squeezing plate will be driven to move in the opposite direction, so the slider 35 is gradually reset by the action of the second spring 37).

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A drainage positioning device for thoracic surgery, characterized in that: include: An intracavitary positioning component (1), the intracavitary positioning component (1) comprising a positioning catheter (3), the positioning catheter (3) being connected to a thickened tube (4), a micro camera (5) being installed in the thickened tube (4), a protective member (6) for protecting the micro camera (5) being installed on the outer side of the micro camera (5), and the intracavitary positioning component (1) positioning the positioning catheter (3) intracavitarily through the action of the micro camera (5); An extracavitary positioning assembly (2) includes a housing (22), and a fixing member (30) for fixing a positioning catheter (3) is provided on the positioning assembly (2), the fixing member (30) includes a threaded sleeve (31) fixedly connected to a turning handle (28) and installed on the outside of the positioning catheter (3), a fixing plate (32) is fixedly connected to the top of the threaded sleeve (31), and a threaded block (33) is threadedly connected to the threaded sleeve (31), and a tapered groove (34) is provided in the threaded block (33), the extracavitary positioning assembly (2) includes a suction cup (8), and the extracavitary positioning assembly (2) fixes the positioning catheter (3) through the action of the suction cup (8). For extracavitary positioning, the extracavitary positioning assembly (2) further includes a stretching member (9) mounted on the outside of the suction cup (8), the stretching member (9) being used to stretch the patient's skin, the stretching member (9) including a plurality of sliders (35) slidably connected to the housing (22), the bottom end of the slider (35) being fixedly connected to a connecting rod (36) slidably connected to the housing (22), one end of the connecting rod (36) being fixedly connected to an anti-sliding member (38), and one side of the slider (35) being fixedly connected to a second spring (37) fixedly connected to the housing (22), and the slider (35) being connected to a sliding member (39) connected to the threaded rod (27).

2. The intracavitary drainage positioning device for thoracic surgery according to claim 1, characterized in that: The protective member (6) comprises a protective cover (10) installed in the thickened tube (4) and located outside the micro camera (5), the top of the protective cover (10) is fixedly connected to a connecting block (11) on both sides, the connecting block (11) is rotatably connected to a rotating column (12), the rotating column (12) is fixedly connected to a rotating block (13), the rotating block (13) is fixedly connected to a sealing plate (14), the sealing plate (14) is fixedly connected to a connecting column (15), the connecting column (15) is fixedly connected to an elastic rope (16), one end of the elastic rope (16) is fixedly connected to a fixed column (17) fixedly connected to the protective cover (10), and the micro camera (5) is connected to a pneumatic member (18) for pushing the micro camera (5) to move.

3. The intracavitary drainage positioning device for thoracic surgery according to claim 2, characterized in that: The pneumatic part (18) includes an air supply pipe (19) connected to the protective cover (10) and a piston plate (20) fixedly connected to the micro camera (5), wherein the piston plate (20) is slidably connected to the protective cover (10), and one end of the air supply pipe (19) extends to the top position of the positioning catheter (3) and is connected to a bellows (7), wherein a first reset spring (21) is installed in the bellows (7).

4. The intracavitary drainage positioning device for thoracic surgery according to claim 1, characterized in that: A pressure tube (23) connected to the suction cup (8) is installed in the shell (22), a limit strip (24) is fixedly connected to the inner wall of the pressure tube (23), a threaded sleeve (26) slidably connected to the limit strip (24) is slidably connected to the pressure tube (23), a movable block (25) is fixedly connected to the bottom end of the threaded sleeve (26), and a threaded rod (27) is threadedly connected to the threaded sleeve (26), a top end of the threaded rod (27) is fixedly connected to a turning handle (28), and a through hole (29) is opened at the top end of the pressure tube (23), a fixing member (30) is connected to the turning handle (28) for fixing the positioning catheter (3), and the positioning catheter (3) passes through the turning handle (28), the threaded rod (27) and the suction cup (8).

5. The intracavitary drainage positioning device for thoracic surgery according to claim 1, characterized in that: The sliding member (39) includes a connecting ring (40) fixedly connected to the threaded rod (27), a connecting rod (41) fixedly connected to the connecting ring (40), a fixing ring (42) fixedly connected to the top of the connecting rod (41), a plurality of sets of columns (43) fixedly connected to the fixing ring (42), a connecting seat (44) fixedly connected to the bottom end of the column (43), an extrusion plate (45) fixedly connected to the connecting seat (44), and a rotating rod (46) rotatably connected to the sliding block (35) installed on one side of the extrusion plate (45).

6. The intracavitary drainage positioning device for thoracic surgery according to claim 5, characterized in that: Anti-slip grooves are provided on the outer surfaces of the turning handle (28) and the threaded block (33).

Images