A skin tinea sampling and inspection device

Abstract

The present invention relates to the technical field of medical devices, and specifically relates to a skin tinea sampling and inspection device, which includes a handheld frame. Clamping plates are relatively installed on the handheld frame. One side of the clamping plate is an arc surface. Different from the prior art, medical staff can drive the overall device to move horizontally at the affected area of the patient by moving the handheld frame. During this process, the steel wire rope is always in close contact with the affected area of the patient and scraping is performed, resulting in a better sampling effect. Under the action of the resistance increasing mechanism, while the steel wire rope is closely attached to the patient's skin, the length required for the movement of the steel wire rope can be released according to the patient's body type, making the device applicable to patients of different body types. Under the action of the negative pressure suction mechanism and the synchronous linkage mechanism, there is always a certain distance between the air nozzle and the affected area, avoiding contact between the air nozzle and the affected area, and automatically collecting the tinea sample, which is convenient for subsequent inspection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a skin tinea sampling and inspection device. Background Art

[0002] As a common skin disease, the acquisition of tinea samples is of great significance for subsequent pathological analysis, disease identification, and treatment plan selection. However, there are many deficiencies in traditional skin tinea sampling methods.

[0003] Traditionally, when sampling, doctors or medical workers mainly rely on a scraper to scrape, and then use tweezers to pick up the scraped tinea tissue and put it into a test tube for collection. Although this method is simple and direct, it has significant limitations in the actual operation process.

[0004] First of all, since some tinea are contagious, manual operations using a scraper and tweezers increase the risk of infection for medical staff. Especially when the operation is not standardized or the protective measures are not in place, this risk is more prominent. At the same time, after scraping the skin, medical staff need to pick up and place multiple times, with low efficiency.

[0005] For example, the Chinese Patent Network Publication No. CN113974699A proposes a dermatology tinea sampling and inspection device. It senses that the distance between the first distance sensor and the first support frame reaches a preset value, so that the output shaft of the reduction motor rotates to drive the second rotating shaft and the gear to rotate, thereby making the scraper move inward to scrape tinea, achieving the effect of automatic scraping and saving manpower. However, the shape of its scraper is fixed, while the position of the patient's tinea is not fixed. Especially for the limbs, the limbs themselves have a large arc, and the scraper cannot adapt well. At the same time, even if the tinea is scraped, the scraped sample cannot be collected, with obvious drawbacks. Therefore, we propose a sampling and inspection device that can automatically scrape and collect skin tinea. Summary of the Invention

[0006] To solve the above technical problems, the present invention provides a skin tinea sampling and inspection device, including a handheld frame, on which clamping plates are relatively installed. One side of the clamping plate is an arc surface, and further includes:

[0007] A strong elastic bandage, which is installed on the clamping plate and fixed to the clamping plate at both ends respectively;

[0008] Arc-shaped blocks, there are several of them, and all are penetrated by the strong elastic bandage. Ball bearings are provided on both the clamping plate and the arc-shaped blocks, and there are several ball bearings;

[0009] Synchronous moving mechanism, the synchronous moving mechanism is installed on the arc-shaped block and connected to the handheld frame. The synchronous moving mechanism keeps the strong elastic bandage and the arc-shaped block always in the same horizontal plane as the handheld frame and does not restrict the stretching of the strong elastic bandage;

[0010] Fixed seat, the fixed seat is installed on the handheld frame;

[0011] Winch, the winch is installed on the fixed seat, a steel wire rope is wound around the winch, one end of the steel wire rope is fixed to the winch, and the other end is fixed to the handheld frame;

[0012] Resistance increasing mechanism, the resistance increasing mechanism is installed on the fixed seat and connected to the winch. When the steel wire rope drives the winch to rotate during the release process, the resistance increasing mechanism controls the friction force received by the winch during rotation;

[0013] Limit mechanism, the limit mechanism is installed on the handheld frame and connected to the resistance increasing mechanism, and the limit mechanism restricts the position of the resistance increasing mechanism;

[0014] Collection tube, the collection tube is cylindrical and has a small inner diameter at the bottom, and sterile cotton is placed inside the collection tube;

[0015] Negative pressure suction mechanism, the negative pressure suction mechanism is installed on the handheld frame and connected to the collection tube. The negative pressure suction mechanism collects the psoriasis scraped off by the steel wire rope into the collection tube through negative pressure;

[0016] Synchronous linkage mechanism, the synchronous linkage mechanism is installed on the handheld frame and connected to the winch and the negative pressure suction mechanism. When the steel wire rope on the winch is released, the synchronous linkage mechanism synchronously drives the negative pressure suction mechanism to move away from the patient's limb.

[0017] In some embodiments, the synchronous moving mechanism includes sliding rails oppositely installed on one side of the arc-shaped block. A support rod is installed on the other side of the arc-shaped block, and a sliding column is installed at the top of the support rod. The sliding column penetrates through the sliding rail, and the same setting is made between the arc-shaped blocks and the handheld frame on both sides.

[0018] In some embodiments, a torsion block is coaxially fixed on one side of the winch, and a rubber sheet is installed between the torsion block and the fixed seat.

[0019] In some embodiments, the resistance increasing mechanism includes an outer cover installed on the fixed seat. A screw rod is penetrated through the outer cover, a screw groove corresponding to the screw rod is opened on the outer cover, and a resistance increasing piece is installed at the top of the screw rod.

[0020] In some embodiments, the limit mechanism includes a polygonal block sleeved on the screw rod. A chute one is opened on the handheld frame, and a U-shaped frame is installed in the chute one. The U-shaped frame clamps the polygonal block.

[0021] In some embodiments, the negative pressure suction mechanism includes a support frame fixed on the hand-held frame. A micro air pump is installed on the support frame. A telescopic tube is conductively connected to the air inlet of the micro air pump. A connector that can be docked with the collection tube is installed on the air outlet of the micro air pump. The top end of the telescopic tube is conductively connected to a nozzle.

[0022] In some embodiments, the synchronous linkage mechanism includes a first groove opened on the hand-held frame and the support frame. A gear reduction box is installed in the first groove. An input gear and an output gear are respectively arranged on the gear reduction box. A transmission gear is sleeved on the winch. The transmission gear meshes with the input gear. A second groove is opened on the gear reduction box. A slider is installed in the second groove. A rack is fixed on the slider. The rack meshes with the output gear. A telescopic column is installed on the support frame. A second rod is fixed on the rack. The second rod penetrates through the telescopic column. A collar is installed at the top end of the second rod. The telescopic tube penetrates through the collar.

[0023] In some embodiments, a hose is relatively sleeved on the steel wire rope.

[0024] In some embodiments, a knob is installed on the screw rod. An arrow mark is set on the knob. Digital identifications are set on the outer cover. There are several digital identifications, which are distributed in a ring shape.

[0025] In some embodiments, a second groove is opened on the arc-shaped block. A roller penetrated by a shaft is arranged on the second groove. The roller is in contact with the steel wire rope.

[0026] The present invention has at least the following beneficial effects:

[0027] 1. Under the action of the hand-held frame and the synchronous moving mechanism, by moving the hand-held frame, medical staff can drive the whole device to move horizontally at the affected part of the patient. During this process, the steel wire rope scrapes the tinea corporis. Due to its own certain deformation ability, the steel wire rope can closely fit the affected part of the patient, and the sampling effect is better;

[0028] 2. Since the limbs of the human body, whether it is the arm or the leg, are generally from thin to thick, under the action of the resistance increasing mechanism, while the steel wire rope is closely attached to the patient's skin, the length required for the steel wire rope to release during the moving process can be released according to the patient's body type, so that the device is applicable to patients of different body types;

[0029] 3. Under the action of the negative pressure suction mechanism and the synchronous linkage mechanism, as the device continuously moves upward at the patient's limb, the nozzle moves synchronously in a small amplitude. There is always a certain distance between the nozzle and the affected part, avoiding contact between the nozzle and the affected part, and automatically collecting the tinea corporis sample at the same time, which is convenient for subsequent inspection;

[0030] 4. During the sampling process, medical staff's hands always maintain a certain distance from the affected area to prevent the risk of infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in it;

[0033] Figure 3 For the present invention Figure 1 Schematic diagram of the structure at B in it;

[0034] Figure 4 It is a schematic diagram of the bottom view structure of the present invention;

[0035] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the present invention;

[0036] Figure 6 For the present invention Figure 5 Schematic diagram of the structure at C in it;

[0037] Figure 7 It is a schematic diagram of the synchronous linkage mechanism structure of the present invention;

[0038] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at D in it;

[0039] Figure 9 It is a schematic diagram of the cross-section of the outer cover of the present invention.

[0040] In the figure: 1. Handheld frame; 11. Clamping plate; 12. Strong elastic bandage; 13. Arc-shaped block; 14. Ball; 2. Synchronous moving mechanism; 21. Slide rail; 22. Support rod; 23. Slide column; 3. Fixed seat; 4. Winch; 41. Steel wire rope; 42. Torsion block; 43. Rubber sheet; 44. Hose; 45. Second groove; 46. Roller; 5. Resistance increasing mechanism; 51. Outer cover; 52. Screw rod; 53. Resistance increasing sheet; 54. Knob; 55. Arrow mark; 56. Digital identifier; 6. Limiting mechanism; 61. Polygonal block; 62. First chute; 63. U-shaped frame; 7. Collection tube; 71. Sterile cotton; 8. Negative pressure suction mechanism; 81. Support frame; 82. Micro air pump; 83. Telescopic tube; 84. Air nozzle; 9. Synchronous linkage mechanism; 91. First groove; 92. Gear reduction box; 93. Input gear; 94. Output gear; 95. Transmission gear; 96. Second chute; 97. Slide block; 98. Rack; 99. Telescopic column; 910. Second rod; 911. Collar. DETAILED DESCRIPTION OF THE INVENTION

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1:

[0042] Please refer to Figures 1-9 , the present invention provides a technical solution: a skin tinea sampling and inspection device, including a hand-held frame 1, clamping plates 11 are oppositely installed on the hand-held frame 1, one side of the clamping plate 11 is an arc surface, and further includes:

[0043] A strong elastic bandage 12, the strong elastic bandage 12 is installed on the clamping plate 11, and both ends are respectively fixed to the clamping plate 11;

[0044] Arc-shaped blocks 13, there are several arc-shaped blocks 13, and all are penetrated by the strong elastic bandage 12. Ball bearings 14 are provided on both the clamping plate 11 and the arc-shaped blocks 13, and there are several ball bearings 14;

[0045] A synchronous moving mechanism 2, the synchronous moving mechanism 2 is installed on the arc-shaped block 13 and is connected to the hand-held frame 1. The synchronous moving mechanism 2 keeps the strong elastic bandage 12 and the arc-shaped block 13 always in the same horizontal plane as the hand-held frame 1, and does not limit the stretching of the strong elastic bandage 12;

[0046] A fixed seat 3, the fixed seat 3 is installed on the hand-held frame 1;

[0047] A winch 4, the winch 4 is installed on the fixed seat 3, a steel wire rope 41 is wound around the winch 4, one end of the steel wire rope 41 is fixed to the winch 4, and the other end is fixed to the hand-held frame 1;

[0048] A resistance increasing mechanism 5, the resistance increasing mechanism 5 is installed on the fixed seat 3 and is connected to the winch 4. When the steel wire rope 41 drives the winch 4 to rotate during the release process, the resistance increasing mechanism 5 adjusts the friction force received by the winch 4 during rotation;

[0049] A limiting mechanism 6, the limiting mechanism 6 is installed on the hand-held frame 1 and is connected to the resistance increasing mechanism 5. The limiting mechanism 6 limits the position of the resistance increasing mechanism 5;

[0050] A collection tube 7, the collection tube 7 is cylindrical, and the inner diameter of the bottom is small. Sterile cotton 71 is placed in the collection tube 7;

[0051] A negative pressure suction mechanism 8, the negative pressure suction mechanism 8 is installed on the hand-held frame 1 and is connected to the collection tube 7. The negative pressure suction mechanism 8 uses negative pressure to collect the tinea scraped off by the steel wire rope 41 into the collection tube 7;

[0052] The synchronous linkage mechanism 9 is installed on the handheld frame 1 and is connected to the winch 4 and the negative pressure suction mechanism 8. When the steel wire rope 41 on the winch 4 is released, the synchronous linkage mechanism 9 synchronously drives the negative pressure suction mechanism 8 to move away from the patient's limb.

[0053] The synchronous moving mechanism 2 includes slide rails 21 oppositely installed on one side of the arc-shaped block 13. A support rod 22 is installed on the other side of the arc-shaped block 13. A sliding column 23 is installed at the top of the support rod 22, and the sliding column 23 penetrates through the slide rail 21. The same setting is made between the arc-shaped blocks 13 and the handheld frame 1 on both sides.

[0054] During the process of the device sliding on the patient's limb, due to joints or other obstacles, one side of the strong elastic bandage 12 may shift. However, the slide rail 21 and the sliding column 23 are always on the same horizontal plane as the handheld frame 1. Under their restriction, all the arc-shaped blocks 13 are always on the same horizontal plane as the handheld frame 1, avoiding this phenomenon. Moreover, when wearing the device on the patient, under the action of the strong elastic bandage 12, the arc-shaped blocks 13 can be bent at different angles. At this time, the sliding column 23 moves within the slide rail 21 to compensate for the rotation angle of the arc-shaped block 13. Finally, with the cooperation of the steel wire rope 41, the arc-shaped block 13 closely adheres to the patient's skin. The balls 14 on the inner walls of the handheld frame 1 and the arc-shaped block 13 can reduce the friction when the overall device slides on the patient's limb. While facilitating the stable movement of the device, the balls 14 can relax the muscles at the limb and delay the patient's nervousness during sampling.

[0055] A torsion block 42 is coaxially fixed on one side of the winch 4, and a rubber sheet 43 is installed between the torsion block 42 and the fixed seat 3.

[0056] The medical staff first relaxes the steel wire rope 41 to a certain extent, and then enables the patient to pass the sampled limb through between the strong elastic bandage 12 and the steel wire rope 41 and stops when the steel wire rope 41 is below the affected area. At this time, the torsion block 42 is rotated, and the torsion block 42 drives the winch 4 to rotate. The winch 4 retrieves the steel wire rope 41 and stops after the steel wire rope 41 fits the patient's skin. Since the rubber sheet 43 has an anti-slip effect, it plays a pre-positioning role to prevent the patient's movement from causing the steel wire rope 41 to become loose.

[0057] The resistance increasing mechanism 5 includes an outer cover 51 installed on the fixed seat 3. A screw rod 52 is installed through the outer cover 51. A screw groove corresponding to the screw rod 52 is opened on the outer cover 51, and a resistance increasing piece 53 is installed at the top of the screw rod 52.

[0058] After the wire rope 41 and the arc-shaped block 13 on the strong elastic bandage 12 initially clamp the patient's limb, at this time, the medical staff observes the body shape of the patient's limb and rotates the knob 54 according to the actual situation. The knob 54 drives the resistance-increasing piece 53 through the screw rod 52 to squeeze one side of the winch 4, increasing the friction required for the winch 4 to rotate. At this time, when the medical staff moves the handheld frame 1, since the winch 4 needs a certain amount of friction to rotate, during the movement, the wire rope 41 always clings to the patient's skin and scrapes the affected area. After using it for a period of time, the wire rope 41 will cause a certain amount of wear to the resistance-increasing piece 53, reducing the influence of the resistance-increasing piece 53 on the winch 4. At this time, only the rotation force of the screw rod 52 needs to be increased to make up for it. At the same time, if some patients have well-developed limb muscles, such as fitness enthusiasts, whose arm and leg muscles bulge and the limb circumference span is relatively large, the screw rod 52 can be appropriately loosened, and the wire rope 41 can smoothly adapt to the patient's body shape during the movement, reducing the pain of the patient while scraping.

[0059] The limiting mechanism 6 includes a polygonal block 61 sleeved on the screw rod 52. A first chute 62 is opened on the handheld frame 1, and a U-shaped frame 63 is installed in the first chute 62, and the U-shaped frame 63 clamps the polygonal block 61.

[0060] Slide the U-shaped frame 63 to separate the U-shaped frame 63 from the polygonal block 61, adjust the screw rod 52. After the adjustment is completed, re-clamp the U-shaped frame 63 and the polygonal block 61 to limit the rotation of the screw rod 52, avoiding the winch 4 driving the screw rod 52 to rotate through the resistance-increasing piece 53 when the friction between the resistance-increasing piece 53 and the winch 4 is relatively large.

[0061] The negative pressure suction mechanism 8 includes a support frame 81 fixed on the handheld frame 1. A micro air pump 82 is installed on the support frame 81. A telescopic tube 83 is conductively connected to the air inlet of the micro air pump 82. A connector that can be docked with the collection tube 7 is installed on the air outlet of the micro air pump 82. The top of the telescopic tube 83 is conductively connected to an air nozzle 84.

[0062] After the device is worn on the patient's limb, dock the collection tube 7 with the air outlet of the micro air pump 82, turn on the micro air pump 82, and the micro air pump 82 generates negative pressure below the air nozzle 84 through the telescopic tube 83. After the wire rope 41 scrapes the tinea sample, the sample enters the collection tube 7 through the air nozzle 84 and the telescopic tube 83. Blocked by the sterile cotton 71 in the collection tube 7, the gas flows out from the bottom of the collection tube 7, and the sample is automatically collected in the collection tube 7.

[0063] The synchronous linkage mechanism 9 includes a first groove 91 formed in the handheld frame 1 and the support frame 81. A gear reduction box 92 is installed in the first groove 91. An input gear 93 and an output gear 94 are respectively arranged on the gear reduction box 92. A transmission gear 95 is sleeved on the winch 4. The transmission gear 95 meshes with the input gear 93. A second groove 96 is formed in the gear reduction box 92. A slider 97 is installed in the second groove 96. A rack 98 is fixed on the slider 97. The rack 98 meshes with the output gear 94. A telescopic column 99 is installed on the support frame 81. A second rod 910 is fixed on the rack 98. The second rod 910 penetrates through the telescopic column 99. A collar 911 is installed at the top of the second rod 910. The telescopic tube 83 penetrates through the collar 911.

[0064] If the air nozzle 84 always remains in the same position, during the sampling process, it is very likely that the air nozzle 84 will touch the affected area. On the one hand, it is not easy to collect the sample. On the other hand, the skin after scraping is relatively sensitive and may cause discomfort to the patient.

[0065] When the device moves on the patient's limb, due to the change in the limb circumference, the steel wire rope 41 will drive the winch 4 to rotate. The rotation of the winch 4 drives the transmission gear 95 to rotate. The transmission gear 95 drives the input gear 93 to rotate. After being converted by the gear reduction box 92, the input gear 93 drives the output gear 94 to rotate slowly. The gear reduction box 92 is a prior art. The output gear 94 drives the rack 98 to move. The rack 98 drives the telescopic tube 83 to drive the air nozzle 84 to retract upward through the collar 911 at the top of the second rod 910, so that the air nozzle 84 always has a certain distance from the patient's skin. The telescopic column 99 makes the movement track of the second rod 910 more stable. For some special patients, such as those with a limb distribution of "thin [1]-thick [2]-thin [3]", after sampling in the first half, the device can be raised to the thin [3] position, then rotate the knob 42 to tighten the steel wire rope again, and then move in the reverse direction for sampling.

[0066] The working principle of the present invention is as follows: First, the medical staff relax the steel wire rope 41 to a certain extent, and then let the patient pass the sampled limb through between the strong elastic bandage 12 and the steel wire rope 41, and stop when the steel wire rope 41 is below the affected area. At this time, rotate the torsion block 42, and the torsion block 42 drives the winch 4 to rotate. The winch 4 recovers the steel wire rope 41, and stops after the steel wire rope 41 fits with the patient's skin. Slide the U-shaped frame 63 to separate the U-shaped frame 63 from the polygonal block 61. The medical staff observes the body shape of the patient's limb, rotates the screw rod 52 according to the actual situation, and drives the resistance-increasing piece 53 to squeeze one side of the winch 4 by the screw rod 52. After the adjustment is completed, re-engage the U-shaped frame 63 and the polygonal block 61 to limit the rotation of the screw rod 52, and avoid the winch 4 driving the screw rod 52 to rotate through the resistance-increasing piece 53 when the friction between the resistance-increasing piece 53 and the winch 4 is large. Turn on the micro air pump 82. The micro air pump 82 generates negative pressure below the air nozzle 84 through the telescopic tube 83. When the device moves on the patient's limb, due to the change in the limb circumference, the steel wire rope 41 will drive the winch 4 to rotate. The rotation of the winch 4 drives the transmission gear 95 to rotate. The transmission rack 98 drives the output gear 94 to rotate slowly through the input gear 93 and the gear reduction box 92. The gear reduction box 92 is a prior art. The output gear 94 drives the rack 98 to move. The rack 98 drives the telescopic tube 83 to drive the air nozzle 84 to retract upward through the collar 911 at the top of the rod two 910. At the same time, the steel wire rope 41 scrapes the tinea sample. Blocked by the sterile cotton 71 in the collection tube 7, the gas flows out from the bottom of the collection tube 7, and the sample is automatically collected into the collection tube 7. Embodiment 2:

[0067] On the basis of Embodiment 1, the present solution is further optimized:

[0068] A hose 44 is relatively sleeved on the steel wire rope 41.

[0069] When sampling tinea, since not too much sample is needed, on the one hand, the hose 44 limits the amount of sampling, and at the same time reduces the scraping area of the part of the steel wire rope 41 on the patient's skin, reducing the patient's pain.

[0070] A knob 54 is installed on the screw rod 52. An arrow mark 55 is set on the knob 54. A digital identifier 56 is set on the outer cover 51. There are several digital identifiers 56, which are distributed in a ring.

[0071] The digital identifier 56 and the arrow mark 55 can more intuitively show the magnitude of the friction force applied to the rotation of the winch 4, which is convenient for medical staff to adjust according to the patient's body shape and the usage time of the device, reducing the overall operation difficulty.

[0072] A second groove 45 is formed on the arc-shaped block 13. A roller 46 penetrated by a shaft is arranged on the second groove 45. The roller 46 is in contact with the steel wire rope 41.

[0073] For some thin patients, after the device is worn on the patient's limb, the roller 46 acts as a fixed pulley, reducing the wear between the steel wire rope 41 of the winch 4 and the hand-held frame 1. At the same time, when the steel wire rope 41 is released, the roller 46 rotates synchronously, making the device operate more stably.

[0074] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0075] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A skin psoriasis sampling and testing device, comprising a handheld frame (1), a clamping plate (11) being mounted on the handheld frame (1) opposite to the handheld frame, one side of the clamping plate (11) being a curved surface, characterized in that: Also includes: A strong elastic bandage (12), wherein the strong elastic bandage (12) is mounted on the clamping plate (11), and both ends of the strong elastic bandage (12) are respectively fixed to the clamping plate (11); Arc blocks (13), there are a plurality of arc blocks (13), all of which are penetrated by a strong elastic bandage (12), and balls (14) are provided on the clamping plate (11) and the arc blocks (13), and there are a plurality of balls (14); A synchronous moving mechanism (2), the synchronous moving mechanism (2) being mounted on the arc block (13) and connected to the handheld frame (1), the synchronous moving mechanism (2) enabling the strong elastic bandage (12) and the arc block (13) to always be in the same horizontal plane as the handheld frame (1) and not restricting the extension and retraction of the strong elastic bandage (12); The synchronous movement mechanism (2) comprises a slide rail (21) mounted relatively to one side of the arc block (13); a support rod (22) is mounted on the other side of the arc block (13); a slide column (23) is mounted on the top of the support rod (22); the slide column (23) penetrates the slide rail (21); the positions and connection relationships between the arc block (13) and the hand-held frame (1) on both sides of the strong elastic bandage (12) are the same; A fixing seat (3), wherein the fixing seat (3) is mounted on the handheld frame (1); A winch (4), the winch (4) being mounted on a fixing seat (3), a steel wire rope (41) being wound around the winch (4), one end of the steel wire rope (41) being fixed to the winch (4), and the other end of the steel wire rope (41) being fixed to the handheld frame (1); a resistance increasing mechanism (5), the resistance increasing mechanism (5) being mounted on the fixing seat (3) and connected to the winch (4); when the steel wire rope (41) drives the winch (4) to rotate during the release process, the resistance increasing mechanism (5) controls the friction force exerted on the winch (4) during the rotation; a limiting mechanism (6), the limiting mechanism (6) being mounted on the handheld frame (1) and connected to the resistance increasing mechanism (5), the limiting mechanism (6) limiting the position of the resistance increasing mechanism (5); A collecting tube (7), the collecting tube (7) being cylindrical and having a small inner diameter at the bottom, and a sterile cotton pad (71) being placed in the collecting tube (7); A negative pressure suction mechanism (8) is mounted on the handheld frame (1) and connected to the collection tube (7). The negative pressure suction mechanism (8) collects the psoriasis scraped off by the steel wire rope (41) into the collection tube (7) through negative pressure.

2. The skin psoriasis sampling and testing device according to claim 1, characterized in that: A torsion block (42) is coaxially fixed to one side of the winch (4), and a rubber sheet (43) is installed between the torsion block (42) and the fixing seat (3).

3. The skin psoriasis sampling and testing device according to claim 2, characterized in that: The resistance increasing mechanism (5) comprises an outer cover (51) mounted on a fixing seat (3), a screw rod (52) being installed through the outer cover (51), a screw groove corresponding to the screw rod (52) being formed on the outer cover (51), and a resistance increasing sheet (53) being installed at the top end of the screw rod (52).

4. The skin psoriasis sampling and testing device according to claim 3, characterized in that: The limiting mechanism (6) comprises a polygonal block (61) sleeved on a screw rod (52); a slide groove (62) is provided on the handheld frame (1); a U-shaped frame (63) is installed in the slide groove (62); and the U-shaped frame (63) clamps the polygonal block (61).

5. The skin psoriasis sampling and testing device according to claim 4, characterized in that: The negative pressure suction mechanism (8) comprises a support frame (81) fixed on the handheld frame (1), a micro air pump (82) is mounted on the support frame (81), an air inlet of the micro air pump (82) is conductively connected to a telescopic tube (83), an air outlet of the micro air pump (82) is mounted with a joint that can be docked with a collection tube (7), and a top end of the telescopic tube (83) is conductively connected to an air nozzle (84); A synchronous linkage mechanism (9) is installed on the handheld frame (1), and the synchronous linkage mechanism (9) is connected to the winch (4) and the negative pressure suction mechanism (8). When the steel wire rope (41) on the winch (4) is released, the synchronous linkage mechanism (9) synchronously drives the negative pressure suction mechanism (8) to move in a direction away from the patient's limbs.

6. The skin psoriasis sampling and testing device according to claim 5, characterized in that: The synchronous linkage mechanism (9) comprises a groove one (91) installed on the handheld frame (1) and the support frame (81), a gear reduction box (92) is installed in the groove one (91), an input gear (93) and an output gear (94) are respectively provided on the gear reduction box (92), a transmission gear (95) is sleeved on the capstan (4), the transmission gear (95) is meshed with the input gear (93), and a slide groove two (96) is provided on the gear reduction box (92). A slider (97) is installed in the second slide groove (96), a rack (98) is fixed on the slider (97), the rack (98) and the output gear (94) are meshed with each other, a telescopic column (99) is installed on the support frame (81), a rod (910) is fixed on the rack (98), the rod (910) penetrates the telescopic column (99), a ring (911) is installed on the top of the rod (910), and the ring (911) is penetrated by the telescopic tube (83).

7. The skin psoriasis sampling and testing device according to claim 6, characterized in that: A hose (44) is sleeved on the steel wire rope (41).

8. The skin psoriasis sampling and testing device according to claim 7, characterized in that: The screw rod (52) is provided with a knob (54), and an arrow mark (55) is provided on the knob (54). The outer cover (51) is provided with a number mark (56), and there are a plurality of number marks (56) distributed in a ring shape.

9. The skin psoriasis sampling and testing device according to claim 8, characterized in that: The arc block (13) is provided with a second groove (45), and a roller (46) penetrated by a shaft is provided on the second groove (45), and the roller (46) is fitted with the steel wire rope (41).

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