Arm support for blood sampling in medical examination center

Abstract

The application discloses an arm support for blood sampling in a physical examination center, which comprises a tightening assembly and a holding assembly. The tightening assembly comprises a mounting frame, and gears are symmetrically arranged on the left and right sides of the inside of the mounting frame and are connected through pivots. An annular plate is arranged between the two adjacent gears. A rack is arranged on the outside of the annular plate, and the rack is engaged with the two adjacent gears. A ring-shaped groove is formed in the side wall surface of the annular plate. A plurality of arc-shaped blocks are slidably connected in the ring-shaped groove. The arc-shaped blocks are fixedly connected to the surface of the mounting frame through connecting blocks. The device has the effects of automatically tightening the rubber tube at the elbow of the examinee, applying iodophor on the skin surface and freely adjusting the position of the arm support through the cooperation of the adjusting assembly, the tightening assembly, the applying assembly, the arm support assembly, the holding assembly and other structures.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to an arm support for blood collection in a health checkup center. Background Technology

[0002] A physical examination is a medical examination that examines a person’s body using medical means and methods. It is a diagnostic step in medical care and a means of examining symptoms or diseases and their related factors. The procedure for a health check-up is usually to have blood drawn on an empty stomach. In the blood test, the examinee usually places their arm on the blood collection arm holder before the medical staff draws the blood.

[0003] However, the existing structure still has some shortcomings. First, the current arm support structure for blood collection during physical examinations is relatively simple in design and has a limited function. Before blood collection, the doctor needs to use a rubber tube to tighten around the examinee's elbow and have the examinee clench their fist so that the veins in the arm can bulge and provide sufficient blood pressure. These steps currently require the doctor's guidance and manual operation. If there are many people coming for physical examinations, the doctor's workload will be very heavy, and it is not conducive to improving efficiency and saving time. Second, after the median cubital vein in the examinee's arm bulges, the doctor needs to apply iodine to the skin for sterilization and disinfection. Prepare the needles and blood collection tubes. If the device can automatically pick up iodine-soaked cotton and apply it to the skin, the doctor can complete the subsequent preparations during this time, thus greatly shortening the blood collection time. This reduces the doctor's workload and allows examinees to avoid long queues. Some existing devices have automatic disinfection functions, but the disinfection tools need to be used multiple times and cannot be replaced after one use. Finally, because examinees have different body shapes, some are tall and some are short, and sometimes the armrest is too high, it is difficult for some people to put their arms on the armrest. The existing structure cannot flexibly and easily adjust the position of the armrest.

[0004] Therefore, it is necessary to design an arm support for blood collection in a health checkup center to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an arm support for blood collection in a physical examination center. By setting up an adjustment component, a tightening component, an application component, an arm support component, a gripping component, and other structures to cooperate with each other, the device can automatically tighten a rubber tube at the elbow of the examinee, apply iodine to the skin surface, and freely adjust the position of the arm support.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an arm support for blood collection in a physical examination center, comprising: a clamping component and a gripping component. The clamping component includes a mounting frame. Gears are symmetrically connected to the left and right sides of the mounting frame via rotating shafts. An annular plate is provided between two adjacent gears. A rack is provided on the outer side of the annular plate, and the rack meshes with the two adjacent gears. An annular groove is formed on one side wall surface of the annular plate. Several arc-shaped blocks are slidably connected inside the annular groove. The arc-shaped blocks are fixedly connected to the surface of the mounting frame via connecting blocks. One end of each of the four gear shafts passes through the surface of the mounting frame and is connected to a motor. The top of the annular plate is configured as an open structure. First clamping plates are fixedly connected to one side wall surface of each of the two annular plates. A screw is rotatably connected to the wall surface, and a second clamping plate is threaded onto the external surface of the screw. A rubber tube is provided between the second clamping plate and the first clamping plate. The two sets of first clamping plates and second clamping plates are arranged obliquely symmetrically. A second arm support is provided on one side of the fastening assembly. Fixed blocks are rotatably connected to the two side wall surfaces of the second arm support. A second sliding frame is slidably connected to the fixed blocks. A circular plate is fixedly connected to the top of the second sliding frame via a connecting rod. Several second sliding grooves are evenly distributed around the axis on the relatively close side surfaces of the two circular plates. A gripping plate is slidably connected inside the second sliding groove. The surface of the gripping plate is set as an arc surface. A second spring is fixedly connected between the gripping plate and the inner wall of the second sliding groove. A first spring is fixedly connected between the second sliding frame and the side wall of the second arm support.

[0007] As a further improvement of the present invention, an arm support assembly is provided on one side of the fastening assembly, and a fixing rod is symmetrically fixedly connected to the side wall surface of the second arm support near the fastening assembly. A first arm support is slidably connected to the surface of the fixing rod. Both the first and second arm supports have arc-shaped grooves on their surfaces. An external elastic pad can be adhered to the surface of the arc-shaped grooves. The first arm support is connected to the mounting bracket by bolt threads.

[0008] As a further improvement of the present invention, an adjustment component is provided on one side of the first arm support. The adjustment component includes a fixed plate. The fixed plate has first sliding grooves symmetrically opened on the left and right sides of one side wall surface of the first arm support. A first slider is slidably connected inside the first sliding groove. A first telescopic cylinder is connected to the top of the first slider. The surface of the first telescopic cylinder is fixedly connected to the surface of the fixed plate. A movable plate is fixedly connected between the two first sliders.

[0009] As a further improvement of the present invention, a double-ended screw is rotatably connected to the surface of the movable plate, and threaded sleeves are threadedly connected to both sides of the double-ended screw. Limiting rods are fixedly connected to the surfaces of the movable plate located on the upper and lower sides of the double-ended screw. Side plates are fixedly connected to the surfaces of the two threaded sleeves. One end of the side plate is slidably connected to the surface of the limiting rod. Adjusting plates are connected to the surfaces of the four side plates through connecting rods and shafts. The adjusting plates are threadedly connected to the side wall of the first arm support by bolts.

[0010] As a further improvement of the present invention, an application component is provided above the adjustment component. The application component includes a horizontal plate with a stepped groove on its surface. The horizontal groove is higher at one end near the second arm support than at the end near the fastening component. An installation plate is slidably connected inside the stepped groove. A first sliding frame is fixedly connected to the top of the installation plate. A second telescopic cylinder is fixedly connected to one side wall of the horizontal plate. The output end of the second telescopic cylinder is slidably connected to the first sliding frame.

[0011] As a further improvement of the present invention, a connecting frame is fixedly connected to the bottom of the mounting plate, a base plate is fixedly connected to the bottom of the connecting frame, a sliding rod is slidably connected inside the base plate, a third spring is fixedly connected between the top of the sliding rod and the bottom inner wall of the mounting plate, a third telescopic cylinder is fixedly connected to the bottom of the sliding rod, a moving block is fixedly connected to the output end of the third telescopic cylinder, adjusting blocks are rotatably connected to both side walls of the moving block, a clamping plate is rotatably connected to one end of the adjusting block, a cylindrical clamping block is fixedly connected to one end of the clamping plate relative to the adjusting block, a limit frame is connected between the two clamping plates and the side wall of the third telescopic cylinder, and the limit frame is rotatably connected to the rotating shaft of the clamping plate.

[0012] As a further improvement of the present invention, a placement plate is fixedly connected to the surface of the adjustment plate by a connecting rod, and the surface of the placement plate is provided with a plurality of evenly distributed placement grooves, and the placement plate is located on the upper side of the second arm support.

[0013] As a further improvement of the present invention, a mounting base is fixedly connected to the bottom of the fixing plate, and a supporting inclined plate is symmetrically connected to the top of the mounting base and one side wall of the fixing plate by bolts. Fastening bolts are threadedly connected to the four corners of the surface of the mounting base.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. In this invention, before using the device, the various components are connected together using bolts or other structures, and the device is fixed to the workbench of the usage site using the fastening bolts on the mounting base. At this time, the first arm support and the second arm support will be suspended outside the workbench, which makes it convenient for doctors to adjust the height and position of the device according to the height of the examinee. When adjusting the height, the doctor can activate the switches of the two first telescopic cylinders to drive the first sliders inside the two first slides to move longitudinally. At this time, the moving plate between the two first sliders will drive the first arm support and the second arm support and other structures to move synchronously. Then, the device can be moved horizontally as needed. Specifically, the external rotary motor drives the double-headed screw to rotate. The two threaded sleeves on the double-headed screw are restricted by the limit rods on both sides and push the adjustment plate on one side to move horizontally, so that the first arm support and the second arm support are at a suitable height and will not make the examinee feel uncomfortable.

[0016] 2. In this invention, after adjustment, the examinee needs to make the median cubital vein on the arm protrude to generate sufficient blood pressure so that the doctor can complete the blood collection. At this time, the examinee grips the multiple grip plates arranged around the axis of the circular plate and exerts force with all five fingers. Under the action of the second slide and the second spring, the grip plates are forced to contract inward, so that the vein on the examinee's arm can be better raised. This grip component can effectively guide and assist the examinee in cooperating, and the height and angle of the grip component can be adjusted by the second sliding frame to facilitate use by people of different body types.

[0017] 3. In this invention, after the examinee's arm is placed on the first armrest and the second armrest, the doctor can adjust the distance between the first armrest and the second armrest using a fixing rod, so that the examinee's elbow crease is located between the two annular plates. When the above operation is completed, the two ends of the rubber tube are clamped between the two clamping mechanisms by the cooperation of the first clamping plate and the second clamping plate. Then, the switches of multiple motors are turned on to drive the two annular plates to rotate clockwise and counterclockwise. The rubber tubes on the two annular plates will pass around the top of the arm from both sides and rotate, thereby tightening the examinee's elbow crease so that the veins in the arm can provide sufficient blood pressure. During this process, the doctor can place multiple cotton swabs soaked in iodine into the placement slots on the placement plate.

[0018] 4. In this invention, after the doctor completes the above steps, the second telescopic cylinder can be activated to push the mounting plate to a higher position in the groove. At this time, the bottom of the application component is located above the placement plate. Then, the third telescopic cylinder drives the bottom moving block to move upward. With the cooperation of the adjusting block and the limiting frame, the ends of the two clamping plates with columnar clamping blocks will gradually move closer together and clamp the disinfectant cotton cloth soaked in iodine in the placement groove. The surface of the columnar clamping block is relatively smooth and will not cause damage to the user's skin.

[0019] 5. In this invention, the second telescopic cylinder is then activated to move back until the mounting plate reaches the lower end of the stepped groove. At this time, the two cylindrical clamping blocks at the bottom of the application component will be located on the skin of the examinee's arm. Since people of different body types have different builds and the skin is elastic, a third spring is connected between the sliding rod and the mounting plate. Thus, when the second telescopic cylinder drives the mounting plate to move back and forth horizontally at the lower position of the stepped groove, the height of the clamping plate can be adjusted so that the iodine-soaked disinfectant cotton cloth can evenly apply the iodine to the examinee's skin. During this time, the doctor can prepare the needle and blood collection tube, thus saving time. When the disinfectant cotton cloth is used up, it can be placed on the placement plate through the cooperation of the second telescopic cylinder and the stepped groove, and a new disinfectant cotton cloth can be clamped by the clamping plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 .

[0023] Figure 4 This is a schematic diagram of the adjustment component of the present invention.

[0024] Figure 5 This is a schematic diagram of the armrest assembly of the present invention.

[0025] Figure 6 Schematic diagram of the fastening component of the present invention Figure 1 .

[0026] Figure 7 Schematic diagram of the fastening component of the present invention Figure 2 .

[0027] Figure 8 This is a schematic diagram of the application component of the present invention.

[0028] Figure 9This is a schematic diagram of the structure at point A of the present invention.

[0029] Figure 10 This is a schematic diagram of the structure at point B of the present invention.

[0030] In the diagram: 1. Mounting base; 2. Adjustment assembly; 3. Fastening assembly; 4. Application assembly; 5. Arm support assembly; 6. Grip assembly; 7. First sliding frame; 8. Stepped groove; 9. First slider; 10. Placement plate; 11. Supporting inclined plate; 12. Mounting plate; 13. First sliding groove; 14. First telescopic cylinder; 15. Moving plate; 16. Threaded sleeve; 17. Adjustment plate; 18. Limiting rod; 19. Double-ended screw; 20. Side plate; 21. Fixing plate; 22. First arm support; 23. Fixing rod; 24. Second arm support; 25. Second sliding frame; 26. Circular plate; 27. 28. First spring; 29. ​​Grip plate; 30. Second slide groove; 31. Second spring; 32. Mounting bracket; 33. Arc block; 34. Annular groove; 35. Annular plate; 36. Gear; 37. Motor; 38. Rack; 49. Rubber tube; 40. First clamping plate; 41. Second clamping plate; 42. Second telescopic cylinder; 43. Horizontal plate; 44. Connecting bracket; 45. Third spring; 46. Base plate; 47. Third telescopic cylinder; 48. Moving block; 49. Columnar clamping block; 50. Clamping plate; 51. Adjusting block; 52. Limiting bracket; 53. Sliding rod; 54. Screw. Detailed Implementation

[0031] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0032] Example 1

[0033] like Figures 1 to 10As shown, a blood collection arm support for a physical examination center includes a clamping component 3 and a gripping component 6. The clamping component 3 includes a mounting frame 31. Gears 35 are symmetrically connected to the left and right sides of the mounting frame 31 via rotating shafts. An annular plate 34 is provided between two adjacent gears 35. A rack 37 is provided on the outer side of the annular plate 34, and the rack 37 meshes with the two adjacent gears 35. An annular groove 33 is formed on one side wall surface of the annular plate 34. Several arc-shaped blocks 32 are slidably connected inside the annular groove 33. The arc-shaped blocks 32 are fixedly connected to the surface of the mounting frame 31 via connecting blocks. One end of the rotating shaft of the four gears 35 passes through the surface of the mounting frame 31 and is connected to a motor 36. The top of the annular plate 34 is set as an open structure. A first clamping plate 39 is fixedly connected to one side wall surface of each of the two annular plates 34. A screw is rotatably connected to one side wall surface of the first clamping plate 39. 53. The screw 53 is externally threaded with a second clamping plate 40. A rubber tube 38 is provided between the second clamping plate 40 and the first clamping plate 39. The two sets of first clamping plates 39 and second clamping plates 40 are obliquely symmetrically arranged. A second arm support 24 is provided on one side of the fastening assembly 3. Fixed blocks are rotatably connected to the two side walls of the second arm support 24. The fixed blocks are slidably connected to a second sliding frame 25. A circular plate 26 is fixedly connected to the top of the second sliding frame 25 through a connecting rod. Several second sliding grooves 29 are evenly distributed around the axis on the relatively close side surface of the two circular plates 26. A gripping plate 28 is slidably connected inside the second sliding groove 29. The surface of the gripping plate 28 is set as an arc surface. A second spring 30 is fixedly connected between the gripping plate 28 and the inner wall of the second sliding groove 29. A first spring 27 is fixedly connected between the second sliding frame 25 and the side wall of the second arm support 24.

[0034] In this embodiment, during operation: the examinee needs to make the median cubital vein on their arm bulge, generating sufficient blood pressure so that the doctor can draw blood. The examinee then grips multiple gripping plates 28 arranged around the axis of the circular plate 26, applying force with all five fingers. Under the action of the second slide groove 29 and the second spring 30, the gripping plates 28 contract inward, allowing the vein on the examinee's arm to better protrude. This gripping assembly 6 effectively guides and assists the examinee in cooperating, and the height and angle of the gripping assembly 6 can be adjusted via the second sliding frame 25 to accommodate people of different body types. When the examinee's arm is placed... After the first armrest 22 and the second armrest 24 are in place, the doctor can adjust the distance between the first armrest 22 and the second armrest 24 through the fixing rod 23, so that the elbow crease of the examinee can be located between the two annular plates 34. When the above operation is completed, the two ends of the rubber tube 38 are clamped between the two sets of clamping mechanisms by the cooperation of the first clamping plate 39 and the second clamping plate 40. Then, the switches of multiple motors 36 are turned on to drive the two annular plates 34 to rotate clockwise and counterclockwise. The rubber tubes 38 on the two annular plates 34 will pass around the top of the arm from both sides and rotate, thereby tightening the elbow crease of the examinee so that the veins in the arm can provide sufficient blood pressure.

[0035] Example 2

[0036] An arm support assembly 5 is provided on one side of the fastening assembly 3. A fixing rod 23 is symmetrically fixed to the front and back of the side wall surface of the second arm support 24 near the fastening assembly 3. A first arm support 22 is slidably connected to the surface of the fixing rod 23. Both the surface of the first arm support 22 and the second arm support 24 are provided with arc-shaped grooves. An external elastic pad can be glued to the surface of the arc-shaped grooves. The first arm support 22 is connected to the mounting bracket 31 by bolt threads.

[0037] In this embodiment, the arc-shaped grooves on the surfaces of the first armrest 22 and the second armrest 24 are ergonomic, making it convenient for the examinee to place their arms. By setting external elastic pads, the arms will not feel cold or uncomfortable when they come into contact with the surfaces of the first armrest 22 and the second armrest 24. The first armrest 22 and the second armrest 24 can be extended and retracted laterally by the fixing rod 23. This allows the user's elbow to be placed inside the two annular plates 34 by adjustment, which makes it convenient for the fastening component 3 to fasten the user's elbow.

[0038] An adjustment component 2 is provided on one side of the first arm support 22. The adjustment component 2 includes a fixed plate 21. The fixed plate 21 has first sliding grooves 13 symmetrically opened on the left and right sides of one side wall surface of the first arm support 22. A first slider 9 is slidably connected inside the first sliding groove 13. A first telescopic cylinder 14 is connected to the top of the first slider 9. The surface of the first telescopic cylinder 14 is fixedly connected to the surface of the fixed plate 21. A movable plate 15 is fixedly connected between the two first sliders 9.

[0039] In this embodiment, when adjusting the height, the doctor can activate the switches of the two first telescopic cylinders 14 to drive the first sliders 9 inside the two first slide grooves 13 to move longitudinally. At this time, the moving plate 15 between the two first sliders 9 will drive the first arm support 22 and the second arm support 24 and other structures to move synchronously.

[0040] A double-ended screw 19 is rotatably connected to the surface of the movable plate 15. Threaded sleeves 16 are threadedly connected to both sides of the double-ended screw 19. Limiting rods 18 are fixedly connected to the surfaces of the movable plate 15 located on the upper and lower sides of the double-ended screw 19. Side plates 20 are fixedly connected to the surfaces of the two threaded sleeves 16. One end of the side plate 20 is slidably connected to the surface of the limiting rod 18. Adjusting plates 17 are connected to the surfaces of the four side plates 20 through connecting rod shafts. The adjusting plates 17 are threadedly connected to the side wall of the first arm support 22 by bolts.

[0041] In this embodiment, when in operation, the doctor can move the device horizontally as needed. Specifically, the external rotary motor drives the double-headed screw 19 to rotate. The two threaded sleeves 16 on the double-headed screw 19 are restricted by the limit rods 18 on both sides, which pushes the adjustment plate 17 on one side to move horizontally, so that the first arm support 22 and the second arm support 24 are at a suitable height, so that the examinee will not feel uncomfortable.

[0042] An applicator 4 is located above the adjustment component 2. The applicator 4 includes a horizontal plate 42. A stepped groove 8 is formed on the surface of the horizontal plate 42. The horizontal height of the end of the stepped groove 8 near the second arm support 24 is higher than that of the end near the fastening component 3. A mounting plate 12 is slidably connected inside the stepped groove 8. A first sliding frame 7 is fixedly connected to the top of the mounting plate 12. A second telescopic cylinder 41 is fixedly connected to one side wall of the horizontal plate 42. The output end of the second telescopic cylinder 41 is slidably connected to the first sliding frame 7.

[0043] In this embodiment, when the second telescopic cylinder 41 moves the mounting plate 12 to a higher position in the groove 8, the clamping plate 49 at the bottom of the mounting plate 12 will be above the placement plate 10. In this way, the doctor can use the cylindrical clamping block 48 to clamp the sterile cotton cloth on the placement plate 10. When the mounting plate 12 moves to a lower position in the groove 8, the two cylindrical clamping blocks 48 will come into contact with the arm, so that the user's skin can be evenly coated with iodine.

[0044] A connecting frame 43 is fixedly connected to the bottom of the mounting plate 12. A base plate 45 is fixedly connected to the bottom of the connecting frame 43. A sliding rod 52 is slidably connected inside the base plate 45. A third spring 44 is fixedly connected between the top of the sliding rod 52 and the bottom inner wall of the mounting plate 12. A third telescopic cylinder 46 is fixedly connected to the bottom of the sliding rod 52. A moving block 47 is fixedly connected to the output end of the third telescopic cylinder 46. An adjusting block 50 is rotatably connected to both sides of the moving block 47. A clamping plate 49 is rotatably connected to one end of the adjusting block 50. A cylindrical clamping block 48 is fixedly connected to one end of the clamping plate 49 relative to the adjusting block 50. A limit frame 51 is connected between the two clamping plates 49 and the side wall of the third telescopic cylinder 46. The limit frame 51 is rotatably connected to the rotating shaft of the clamping plate 49.

[0045] In this embodiment, during operation: the doctor can activate the second telescopic cylinder 41 to push the mounting plate 12 to a higher position in the stepped groove 8. At this time, the bottom of the application component 4 is above the placement plate 10. Then, the third telescopic cylinder 46 drives the bottom moving block 47 to move upward. With the cooperation of the adjusting block 50 and the limiting frame 51, the ends of the two clamping plates 49 with cylindrical clamping blocks 48 will gradually move closer together, clamping the disinfectant cotton cloth soaked in iodine in the placement groove. The surface of the cylindrical clamping block 48 is relatively smooth and will not cause damage to the user's skin. Afterward, the second telescopic cylinder 41 is activated to move back until the mounting plate 12 reaches the lower end of the stepped groove 8. At this time, the two cylindrical clamping blocks 48 at the bottom of the application component 4... 8 will be located on the skin of the examinee's arm. Since people of different body types have different body sizes and the skin is elastic, a third spring 44 is connected between the sliding rod 52 and the mounting plate 12. When the second telescopic cylinder 41 drives the mounting plate 12 to move back and forth horizontally at the lower position of the stepped groove 8, the height of the clamping plate 49 can be adjusted so that the iodine-soaked disinfectant cotton cloth can be evenly applied to the examinee's skin. During this time, the doctor can prepare the needle and blood collection tube, thus saving time. When the disinfectant cotton cloth is used up, it can be placed on the placement plate 10 through the cooperation of the second telescopic cylinder 41 and the stepped groove 8, and a new disinfectant cotton cloth can be clamped by the clamping plate 49.

[0046] The surface of the adjusting plate 17 is fixedly connected to the placement plate 10 by a connecting rod. The surface of the placement plate 10 has several evenly distributed placement slots. The placement plate 10 is located on the upper side of the second arm support 24.

[0047] In this embodiment, the placement slot on the placement plate 10 is used to place the disinfectant cotton cloth soaked in iodine solution, and the disinfectant cotton cloth can be put back into the placement slot after use, so as to facilitate the doctor's recycling.

[0048] The bottom of the fixed plate 21 is fixedly connected to the mounting base 1. The top of the mounting base 1 and one side wall of the fixed plate 21 are symmetrically connected to the supporting inclined plate 11 by bolts. The four corners of the surface of the mounting base 1 are threaded with fastening bolts.

[0049] In this embodiment, before using the device, the various components are connected together by bolts or other structures, and the device is fixed to the workbench of the site by the fastening bolts on the mounting base 1. At this time, the first arm support 22 and the second arm support 24 will be suspended outside the workbench, which makes it convenient for doctors to adjust the height and position of the device according to the height of the examinee.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An arm support for blood collection in a health checkup center, characterized in that, The device includes a fastening assembly and a gripping assembly. The fastening assembly includes a mounting frame. Gears are symmetrically connected to the left and right sides of the mounting frame via rotating shafts. An annular plate is positioned between adjacent gears. A rack is positioned on the outer side of the annular plate, meshing with the adjacent gears. An annular groove is formed on one side wall of the annular plate, and several arc-shaped blocks are slidably connected inside the annular groove. The arc-shaped blocks are fixedly connected to the surface of the mounting frame via connecting blocks. One end of each of the four gear shafts passes through the surface of the mounting frame and is connected to a motor. The top of the annular plate is open. First clamping plates are fixedly connected to one side wall of each of the two annular plates. A screw is rotatably connected to one side wall of each first clamping plate. A second clamping plate is threadedly connected to the first clamping plate. A rubber tube is provided between the second clamping plate and the first clamping plate. The two sets of first clamping plates and second clamping plates are arranged obliquely symmetrically. A second arm support is provided on one side of the fastening assembly. Fixed blocks are rotatably connected to the two side walls of the second arm support. The fixed blocks are slidably connected to a second sliding frame. A circular plate is fixedly connected to the top of the second sliding frame through a connecting rod. Several second sliding grooves are evenly distributed around the axis on the relatively close side surface of the two circular plates. A gripping plate is slidably connected inside the second sliding groove. The surface of the gripping plate is set as an arc surface. A second spring is fixedly connected between the gripping plate and the inner wall of the second sliding groove. A first spring is fixedly connected between the second sliding frame and the side wall of the second arm support.

2. The arm support for blood collection in a physical examination center according to claim 1, characterized in that: An arm support assembly is provided on one side of the fastening assembly. A fixing rod is symmetrically fixed to the front and back of the side wall surface of the second arm support near the fastening assembly. A first arm support is slidably connected to the surface of the fixing rod. Both the first and second arm supports have arc-shaped grooves on their surfaces. An external elastic pad can be adhered to the surface of the arc-shaped grooves. The first arm support is connected to the mounting bracket by bolt threads.

3. The arm support for blood collection in a physical examination center according to claim 2, characterized in that: An adjustment assembly is provided on one side of the first arm support. The adjustment assembly includes a fixed plate. The fixed plate has first sliding grooves symmetrically opened on the left and right sides of one side wall surface of the first arm support. A first slider is slidably connected inside the first sliding groove. A first telescopic cylinder is connected to the top of the first slider. The surface of the first telescopic cylinder is fixedly connected to the surface of the fixed plate. A movable plate is fixedly connected between the two first sliders.

4. The arm support for blood collection in a physical examination center according to claim 3, characterized in that: The surface of the movable plate is rotatably connected to a double-ended screw. Both sides of the double-ended screw are threaded with threaded sleeves. Limiting rods are fixedly connected to the surfaces of the movable plate located on the upper and lower sides of the double-ended screw. Side plates are fixedly connected to the surfaces of the two threaded sleeves. One end of the side plate is slidably connected to the surface of the limiting rod. Adjusting plates are connected to the surfaces of the four side plates through connecting rods and shafts. The adjusting plates are threadedly connected to the side wall of the first arm support by bolts.

5. The arm support for blood collection in a physical examination center according to claim 4, characterized in that: An applicator is provided above the adjustment component. The applicator includes a horizontal plate with stepped grooves on its surface. The horizontal grooves are higher at the end near the second arm support than at the end near the fastening component. An installation plate is slidably connected inside the stepped grooves. A first sliding frame is fixedly connected to the top of the installation plate. A second telescopic cylinder is fixedly connected to one side wall of the horizontal plate. The output end of the second telescopic cylinder is slidably connected to the first sliding frame.

6. The arm support for blood collection in a physical examination center according to claim 5, characterized in that: A connecting frame is fixedly connected to the bottom of the mounting plate, and a base plate is fixedly connected to the bottom of the connecting frame. A sliding rod is slidably connected inside the base plate. A third spring is fixedly connected between the top of the sliding rod and the bottom inner wall of the mounting plate. A third telescopic cylinder is fixedly connected to the bottom of the sliding rod. A moving block is fixedly connected to the output end of the third telescopic cylinder. Adjusting blocks are rotatably connected to both sides of the moving block. A clamping plate is rotatably connected to one end of the adjusting block. A cylindrical clamping block is fixedly connected to one end of the clamping plate relative to the adjusting block. Limiting frames are connected between the two clamping plates and the side walls of the third telescopic cylinder. The limiting frames are rotatably connected to the rotating shafts of the clamping plates.

7. The arm support for blood collection in a physical examination center according to claim 6, characterized in that: The surface of the adjustment plate is fixedly connected to a placement plate by a connecting rod. The surface of the placement plate has several evenly distributed placement slots, and the placement plate is located on the upper side of the second arm support.

8. The arm support for blood collection in a physical examination center according to claim 7, characterized in that: The bottom of the fixed plate is fixedly connected to a mounting base, and the top of the mounting base and one side wall of the fixed plate are symmetrically connected to supporting inclined plates by bolts. Fastening bolts are threadedly connected to the four corners of the surface of the mounting base.

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