Thickness-adjustable soft tissue surface and interface skin graft cutting machine

Abstract

The invention discloses a thickness-adjustable soft tissue surface interface skin graft cutting machine which comprises a U-shaped frame, a handle is arranged at the rear end of the U-shaped frame, a roller shaft is arranged at the front end of the U-shaped frame, a roller is arranged on the roller shaft, a spiral linear groove is formed in one side of the roller, a first connecting rod and a second connecting rod are slidably connected to the roller shaft on the two sides of the roller, and a set screw is arranged at the top of the first connecting rod. A rolling shaft is further arranged on the first connecting rod and inserted into the spiral linear groove, the front ends of the first connecting rod and the second connecting rod are connected through two connecting rod shafts, a knife rest is slidably connected to the connecting rod shafts, a knife rest handle is arranged at the top of the knife rest, a blade pressing plate is detachably connected to the knife rest, and a blade is arranged between the knife rest and the blade pressing plate. Through the design of the set screw, the spiral linear groove and the rolling shaft, equal-thickness skin grafts, variable-thickness skin grafts, high-quality small skin grafts and small-width skin grafts can be cut, so that the requirements of scientific research and medical treatment are met.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to a soft tissue surface skin grafting machine with adjustable thickness. Background Art

[0002] Skin graft quality is a key factor affecting skin transplantation surgery and is the main carrier for studying the changes in different soft tissues of humans and animals caused by various factors such as force, chemistry, light, heat, radiation, etc. Existing soft tissue surface interface skin is mainly harvested with the help of traditional special skin harvesting instruments, such as drum skin harvesters or roller skin harvesters. These skin harvesting instruments can only cut a large area of ​​a certain thickness of the entire surface skin or medium-thick skin according to the calibrated value. The thickness of the skin is fixed, and it is impossible to cut a skin with variable thickness. It cannot be used for skin harvesting from small animal surfaces and irregular soft tissue surfaces. Only large-area skin grafts have good quality, and small skin grafts are of poor quality, and even cannot be cut when the skin width is small.

[0003] According to market surveys of medical research institutions, medical institutions, and plastic surgery, there is an urgent need for a machine that can cut soft tissue surface skin grafts with constant or variable thickness and ensure good skin graft quality for use in medical research such as studying animal soft tissue surface tissue growth, clinical skin transplantation, and studying skin lesions. Summary of the invention

[0004] The purpose of the present invention is to provide a soft tissue surface skin grafting machine with adjustable thickness, and to ensure good skin graft quality, so as to solve the problems of poor quality of small-area skin grafts taken by existing traditional skin grafting instruments, inability to cut skin grafts with variable thickness, inability to cut skin grafts with smaller widths, etc., so as to meet the needs of clinical use and medical scientific research.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A thickness-adjustable soft tissue surface skin flap cutting machine comprises a U-shaped frame, wherein the rear end of the U-shaped frame is fastened with a handle, the front end of the U-shaped frame is provided with a roller shaft, a roller is rotatably connected to the roller shaft, a spiral groove is provided on the side of the roller, a first connecting rod and a second connecting rod are respectively provided at both ends of the roller shaft, the rear ends of the first connecting rod and the second connecting rod are both provided with a straight groove, the roller shaft passes through the straight groove and is slidably connected to the first connecting rod and the second connecting rod, the first connecting rod is located on one side of the roller with the spiral groove, the top of the straight groove of the first connecting rod is provided with a plurality of tightening threaded holes penetrating into the straight groove, a tightening screw is provided on the tightening threaded hole, and is tightly attached to the first connecting rod A roller pressure plate is arranged on the outside, one end of the roller pressure plate is provided with an elliptical hole, and the other end is provided with a semicircular notch, the roller pressure plate is fastened to the first connecting rod by a pressure plate screw, the pressure plate screw is arranged in the elliptical hole, a roller is vertically arranged in the semicircular notch, the front end of the roller is inserted into the spiral groove, and the rear end is provided with an annular groove, and the annular groove is engaged with the semicircular notch, the front ends of the first connecting rod and the second connecting rod are connected by at least two connecting rod shafts, a tool holder is slidably connected to the connecting rod shaft, a tool holder handle is fastened to the top of the tool holder, a blade pressure plate is detachably connected to the tool holder, and a blade is arranged between the blade pressure plate and the tool holder.

[0007] Preferably, a scale arranged in an arc is provided on the side of the roller, the scale is located on the second connecting rod side, and the arc radian of the scale is the same as the arc radian of the spiral linear groove, the scale division value is 0.1mm, and a pointer is fixed on the second connecting rod, and the pointer points to the scale.

[0008] The arc of the scale is set to be the same as the arc of the spiral groove. The scale indicated by the pointer is the thickness of the skin graft to be cut. By setting the scale and the pointer, the thickness of the skin graft to be cut can be controlled more accurately. The extremely small graduation value improves the accuracy of skin graft cutting, and skin grafts of corresponding thickness can be cut according to experimental or surgical requirements.

[0009] Preferably, in order to facilitate disassembly, the scale is engraved on a scale plate, and the scale plate is fixed on the roller.

[0010] Preferably, the middle part of the roller shaft is a cylindrical section, and the two ends are threaded sections, a flat section is provided between the cylindrical section and the threaded section, the first connecting rod and the second connecting rod are arranged on the flat section, and a nut is arranged on the threaded section. The flat section is provided on the roller shaft, and the straight grooves on the first connecting rod and the second connecting rod slide on the flat section, which reduces the connection gap, enables the first connecting rod and the second connecting rod to slide on the roller shaft more smoothly, and improves the accuracy of thickness control.

[0011] Preferably, a bearing is provided at the center of the roller. Providing the bearing can reduce the friction between the roller and the roller shaft, converting the sliding friction into rolling friction, making the rolling smoother.

[0012] Preferably, the connection method between the tool holder, the blade pressure plate and the blade is: circular holes are provided on the tool holder, the blade pressure plate and the blade, and the tool holder, the blade and the blade pressure plate are connected by screws, and the screws pass through the circular holes on the blade pressure plate, the blade and the tool holder in turn.

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

[0014] The present invention can realize the cutting of skin flaps of equal thickness and variable thickness through the design of set screws, spiral grooves and rollers, and adopts a smaller width roller to replace the traditional larger width roller, so as to realize the cutting of high-quality small skin flaps and skin flaps of smaller width, and better meet the needs of medical scientific research such as studying the growth of animal soft tissue surface interface tissue, clinical skin transplantation, and skin lesions; and the present invention is a manually operated instrument with a simple structure and low manufacturing cost, but the cut skin flaps are of higher quality and have a higher cost performance; and the present invention is provided with a dial, the scales are arranged in a circular arc, and the arc radian of the scales is the same as the arc radian of the spiral groove, and the scale division value is set to 0.1mm, which improves the accuracy of the present invention and can accurately adjust the thickness of the skin flap as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention at a first viewing angle;

[0016] Figure 2 is a schematic diagram of the structure of an embodiment of the present invention under a second viewing angle;

[0017] Figure 3 This is a schematic diagram of the explosion structure of an embodiment of the present invention;

[0018] Figure 4 It is a schematic diagram of the structure of the roller shaft in an embodiment of the present invention;

[0019] Figure 5 is a schematic structural diagram of a first connecting rod in an embodiment of the present invention;

[0020] Figure 6 is a schematic structural diagram of a roller in an embodiment of the present invention;

[0021] Figure 7 It is a structural schematic diagram of a roller pressure plate in an embodiment of the present invention;

[0022] Figure numerals: 1, U-shaped frame; 2, handle; 3, roller; 3-1, spiral groove; 4, bearing; 5, roller shaft; 5-1, cylindrical section; 5-2, flat section; 5-3, threaded section; 6, first connecting rod; 6-1, straight groove; 6-2, tightening threaded hole; 6-3, roller mounting hole; 7, second connecting rod; 8, tightening screw; 9, connecting rod shaft; 10, roller; 10-1, annular groove; 11, roller pressure plate; 11-1, elliptical hole; 11-2, semicircular notch; 12, pressure plate screw; 13, tool holder; 14, blade; 15, blade pressure plate; 16 tool holder handle; 17, spring washer; 18, dial; 19, pointer. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 7 As shown, a thickness-adjustable soft tissue surface skin flap cutting machine includes a U-shaped frame 1, a handle 2, a roller 3, a bearing 4, a roller shaft 5, a first connecting rod 6, a second connecting rod 7, a set screw 8, a connecting rod shaft 9, a roller 10, a roller pressure plate 11, a pressure plate screw 12, a tool holder 13, a blade 14, a blade pressure plate 15, and a tool holder handle 16.

[0025] In this embodiment, the handle 2 is provided with a thread, and the handle 2 is fixedly connected to the rear end of the U-shaped frame 1 by the thread, and a spring washer 17 is provided between the handle 2 and the U-shaped frame 1; the roller 3 is a hollow cylinder with a circular hole in the center, and a bearing 4 is installed in the circular hole in the center of the roller 3. A spiral groove 3-1 is provided on one side of the roller 3, and the roller 3 has a diameter of 32mm and a width of 10mm; the middle part of the roller shaft 5 is set as a cylindrical section 5-1, and the two sides of the cylindrical section 5-1 are milled into flat sections 5-2, and the two ends of the roller shaft 5 are threaded sections 5-3, and the threaded section 5-3 is provided with a thread and the diameter of the threaded section 5-3 is smaller than the diameter of the cylindrical section 5-1, and the roller 3 is assembled on the cylindrical section 5-1 of the roller shaft 5 with the bearing 4, and the bearing 4 and the roller shaft 5 are interference fit; the U-shaped frame 1 is provided with A circular hole, both ends of the roller shaft 5 are installed on the U-shaped frame 1 through the circular hole and fastened with nuts, and the nuts are screwed on the threaded section 5-3; the flat sections 5-2 at both ends of the roller shaft 5 are respectively equipped with a first connecting rod 6 and a second connecting rod 7, wherein the first connecting rod 6 is arranged on one side of the spiral groove 3-1, and the first connecting rod 6 and the second connecting rod 7 are both parallel to the side plane of the roller 3, and the rear ends of the first connecting rod 6 and the second connecting rod 7 are both provided with a straight groove 6-1, that is, a rectangular groove with arcs at both ends, the straight groove 6-1 passes through the flat section 5-2 of the roller shaft 5 and is slidably connected with the flat section 5-2, and the top of the straight groove 6-1 of the first connecting rod 6 is provided with four fixing threaded holes 6-2 that pass through the straight groove, and a fixing screw 8 is provided on the four fixing threaded holes 6-2, and the fixing screw 8 can be assembled in any fixing threaded hole 6-2.

[0026] A long strip of roller pressure plate 11 is installed on the outer side of the first connecting rod 6, one end of the roller pressure plate 11 is provided with an elliptical hole 11-1, and the other end is provided with a semicircular notch 11-2. The first connecting rod 6 is also provided with a corresponding threaded hole for installing a pressure plate screw 12. The roller pressure plate 11 is connected to the first connecting rod 6 through the pressure plate screw 12. The pressure plate screw 12 is installed in the elliptical hole 11-1, and the roller 10 is cylindrical; the first connecting rod 6 is provided with a roller mounting hole 6-3 for mounting the roller 10, the front end of the roller 10 passes through the roller mounting hole 6-3 and is inserted into the spiral groove 3-1 of the roller 3, and the rear end of the roller 10 is provided with an annular groove 10-1, which is engaged with the semicircular notch 11-2 on the roller pressure plate 11.

[0027] The front ends of the first connecting rod 6 and the second connecting rod 7 are connected by two connecting rod shafts 9, and a tool holder 13 is slidably connected to the connecting rod shaft 9. A tool holder handle 16 is fastened to the top of the tool holder 13 by screws. A blade pressing plate 15 is detachably connected to the tool holder 13, and a blade 14 is arranged between the blade pressing plate 15 and the tool holder 13, wherein circular holes are arranged on the tool holder 13, the blade pressing plate 15 and the blade 14, and the tool holder 13, the blade 14 and the blade pressing plate 15 are connected by screws, and the screws pass through the circular holes on the blade pressing plate 15, the blade 14 and the tool holder 13 in sequence.

[0028] A dial 18 is arranged on the cylindrical section 5-1 of the roller shaft 5 on one side of the second connecting rod 7, close to the side plane of the roller 3. The dial 18 is provided with scales, and the scales are arranged in a circular arc. The arc of the scale is the same as the arc of the spiral groove 3-1 on the roller 3, and the graduation value of the scale is set to 0.1mm. A pointer 19 is fixed on the second connecting rod 7. The scale pointed by the pointer 19 is the distance between the blade 14 and the circular arc surface of the roller 3, which is equal to the thickness of the cut skin.

[0029] The invention uses the following principles or methods:

[0030] 1) When the position of the roller 10 in the spiral groove 3-1 of the roller 3 is farthest from the center of the roller 3, the distance between the blade 14 and the arc surface of the roller 3 is the largest, and the cut skin slice is the thickest; when the position of the roller 10 in the spiral groove 3-1 of the roller is closest to the center of the roller 3, the distance between the blade 14 and the arc surface of the roller 3 is the smallest, and the cut skin slice is the thinnest.

[0031] 2) When in use, stick the biological soft tissue interface on the arc surface of the roller 3 with double-sided tape, hold the handle 2 with the left hand, hold the knife holder handle 16 with the right hand, push the handle 2 with the left hand to make the roller 3 roll forward, and while the roller 3 rolls, the soft tissue surface interface stuck with the double-sided tape is lifted. At this time, pull the knife holder handle 16 with the right hand, and the knife holder handle 16 drives the knife holder 13 to slide on the connecting rod shaft 9, thereby driving the blade 14 to move back and forth, cutting the soft tissue stuck with the double-sided tape on the arc surface of the roller 3, separating it from the matrix, and realizing skin grafting.

[0032] 3) Operation method for cutting leather flaps of equal thickness: first loosen the set screw 8 so that the roller shaft 5 can slide in the straight groove 6-1 on the first connecting rod 6 and the second connecting rod 7; slide the roller 10 in the spiral groove 3-1, and when the pointer 19 points to the target scale, tighten the set screw 8 to fix the first connecting rod 6 on the flat section 5-2 of the roller shaft 5, and then loosen the pressure plate screw 12, and use the elliptical hole 11-1 on the roller pressure plate 11 to make the roller pressure plate 11 slide horizontally, and make the semicircular notch 11-2 on the roller pressure plate 11 disengage from the annular groove 10-1 on the roller 10, then the roller 10 can be withdrawn from the spiral groove 3-1, and leather flaps of equal thickness can be cut, and the scale indicated by the pointer 19 is equal to the thickness of the skin flap to be cut.

[0033] 4) Operation method for cutting gradually thinning leather slices: ensure that the front end of the roller 10 is inserted into the spiral groove 3-1 of the roller 3, and the rear end is engaged with the semicircular notch 11-2 on the roller pressure plate 11, and the roller pressure plate 11 is fixed to the first connecting rod 6 with the pressure plate screw 12, and the set screw 8 is loosened. When the roller 10 slides from the spiral groove 3-1 position farthest from the center of the roller 3 to the spiral groove 3-1 position closest to the center of the roller 3, the roller 10 will drive the first connecting rod 6, the second connecting rod 7 and the tool holder 13 to make circular motion, and the roller shaft 5 can slide in the straight groove 6-1 on the first connecting rod 6 and the second connecting rod 7 to realize the radial movement of the tool holder 13, so as to realize the cutting of gradually thinning leather slices.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thickness-adjustable soft tissue surface skin graft cutting machine, characterized in that: It comprises a U-shaped frame, the rear end of the U-shaped frame is fastened with a handle, the front end of the U-shaped frame is provided with a roller shaft, the roller shaft is rotatably connected to the roller, the side of the roller is provided with a spiral groove, the two ends of the roller shaft are respectively provided with a first connecting rod and a second connecting rod, the rear ends of the first connecting rod and the second connecting rod are both provided with a straight groove, the roller shaft passes through the straight groove and is slidably connected to the first connecting rod and the second connecting rod, the first connecting rod is located on one side of the roller with the spiral groove, the top of the straight groove of the first connecting rod is provided with a plurality of tightening threaded holes penetrating the straight groove, the tightening threaded holes are provided with tightening screws, and a roller pressure plate is provided close to the outer side of the first connecting rod. , an elliptical hole is provided at one end of the roller pressure plate, and a semicircular notch is provided at the other end. The roller pressure plate is fastened to the first connecting rod by a pressure plate screw, and the pressure plate screw is arranged in the elliptical hole. A roller is vertically arranged in the semicircular notch. The front end of the roller is inserted into the spiral groove, and the rear end is provided with an annular groove, and the annular groove is engaged with the semicircular notch. The front ends of the first connecting rod and the second connecting rod are connected by at least two connecting rod shafts, and a tool holder is slidably connected to the connecting rod shaft, and a tool holder handle is fastened to the top of the tool holder, and a blade pressure plate is detachably connected to the tool holder, and a blade is arranged between the blade pressure plate and the tool holder.

2. The thickness-adjustable soft tissue surface skin graft cutting machine according to claim 1, characterized in that: The roller side is provided with a scale arranged in an arc shape, the scale is located on the second connecting rod side, and the arc of the scale is the same as the arc of the spiral groove, the scale division value is 0.1mm, and a pointer is fixed on the second connecting rod, and the pointer points to the scale.

3. The thickness-adjustable soft tissue surface skin graft cutting machine according to claim 2, characterized in that: The scale is engraved on a scale plate, and the scale plate is fixed on the roller.

4. The thickness-adjustable soft tissue surface skin graft cutting machine according to claim 1, characterized in that: The middle part of the roller shaft is a cylindrical section, and both ends are threaded sections. A flat section is provided between the cylindrical section and the threaded section. The first connecting rod and the second connecting rod are provided on the flat section, and a nut is provided on the threaded section.

5. The thickness-adjustable soft tissue surface skin graft cutting machine according to claim 1, characterized in that: A bearing is arranged at the center of the roller.

6. The thickness-adjustable soft tissue surface skin graft cutting machine according to claim 1, characterized in that: The tool holder, the blade pressing plate and the blade are all provided with round holes, and the tool holder, the blade and the blade pressing plate are connected by screws, and the screws pass through the round holes on the blade pressing plate, the blade and the tool holder in sequence.

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