An inflatable tourniquet for blood drawing

Abstract

This invention discloses an inflatable pulse-pressure device for blood drawing, relating to the field of medical devices. It includes a support member with a mounting cavity at its bottom. Two adjusting blocks are slidably mounted on the support member. An adjusting member is fixed at both ends to opposite sides of the two adjusting blocks. An inflatable component is sleeved on the outside of the adjusting member, with both ends fixed to opposite sides of the two adjusting blocks. A first rack plate is fixed to the bottom of each of the two adjusting blocks. The two first rack plates mesh with a first gear rotatably mounted within the mounting cavity. The first gear is positioned between the two first rack plates and connected to a drive member. By adjusting the diameter of the inflatable component to fit the patient's arm, gas is injected into the inflatable component, causing it to expand and fill with blood, making the vein visible. This device is painless and suitable for people with different arm circumferences.

Description

Technical Field

[0001] This invention relates to the field of medical devices, specifically to an inflatable pulse pressure device for blood drawing. Background Technology

[0002] Blood is the main pathway for the body's metabolism and the function of various biomolecules; most diseases will cause changes in the blood.

[0003] Blood tests such as routine blood tests, serum antibody tests, serum antigen tests, etiological examinations, serum creatinine tests, serum transaminase tests, and serum albumin tests can guide doctors in making a preliminary diagnosis and can provide a basis for planning further tests based on the results.

[0004] During blood draws, nurses typically use a tourniquet to tighten a rubber tube while locating a vein for infusion or blood collection. This tube is called a tourniquet or hemostatic tourniquet. When tightening the tourniquet over the patient's upper arm, the arm needs to be secured and pulled taut. Since the patient's arm is usually unclothed during blood draws, this tightening can cause pain and discomfort. Furthermore, in some health checkup departments where there are many people getting blood drawn, using a tourniquet can somewhat reduce work efficiency.

[0005] Therefore, we propose an inflatable pulse pressure device for blood drawing. Summary of the Invention

[0006] The purpose of this invention is to provide an inflatable pulse pressure device for blood drawing to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an inflatable pulse-pressure device for blood drawing, comprising:

[0008] A support member, wherein a mounting cavity is provided at the bottom of the support member, and two adjusting blocks are slidably mounted on the support member;

[0009] An adjusting component is provided, with its two ends fixed to opposite sides of the two adjusting blocks respectively. An inflatable component is sleeved on the outside of the adjusting component, with its two ends fixed to opposite sides of the two adjusting blocks. A first rack plate is fixed to the bottom of each of the two adjusting blocks. The two first rack plates mesh with a first gear rotatably installed in the mounting cavity. The first gear is located between the two first rack plates and is connected to a driving component.

[0010] An air pump, the output end of which is connected to the inflation component via a delivery pipe.

[0011] Preferably, the inflatable component is fitted with a protective shell that is fixed to the support component, and a plurality of elastic bands are fixed on the inner wall of the protective shell. The elastic bands are fixed to a positioning component that is slidably installed on the outside of the inflatable component.

[0012] Preferably, a receiving plate is fixed inside the mounting cavity, a driving disc is rotatably mounted on the receiving plate, and a driven disc that cooperates with and is coaxially fixed to the first gear is mounted on one side of the driving disc;

[0013] A second transmission rod is rotatably mounted on the receiving plate. The second transmission rod passes through one side of the support member. A driving torque is coaxially fixed at the end of the second transmission rod. The second transmission rod is connected to the rotating shaft of the drive disc through a bevel gear set.

[0014] Preferably, a transmission cylinder is sleeved on the outer side of the second transmission rod, and multiple transmission grooves are equally spaced on the inner circumference of the transmission cylinder. The transmission grooves are slidably engaged with the transmission bar that is circumferentially fixed to the outer side of the second transmission rod, and the driving torque is coaxially fixed to the end of the transmission cylinder.

[0015] A limiting ring is fixed to the outer side of the end of the transmission cylinder away from the driving torque, and the limiting ring cooperates with an elastic limiting member fixed to the receiving plate;

[0016] The receiving plate has an assembly slot, and an elastic trigger switch is installed in the assembly slot. The elastic trigger switch is connected to the air pump through a wire, and the elastic trigger switch cooperates with the limiting ring.

[0017] Preferably, the end of the second transmission rod away from the driving torque is coaxially fixed to the first transmission rod, and the first transmission rod is coaxially fixed to the second gear;

[0018] A second rack plate that meshes with the second gear is slidably mounted on the inner wall of the support member. A spring is fixed to one end of the second rack plate, and the end of the spring away from the second rack plate is fixed to the inner wall of the support member. A positioning structure is provided on the opposite side of the drive torque and the support member.

[0019] Preferably, the positioning structure includes a limiting protrusion fixedly installed on the support member facing the drive torque side, the limiting protrusion being circumferentially equidistant, and the drive torque having a plurality of positioning holes circumferentially equidistantly opened on the support member side that cooperate with the limiting protrusion.

[0020] Preferably, the adjusting member is spirally arranged, and the starting end and the ending end of the adjusting member are coplanar;

[0021] The adjusting component is made of high-toughness steel.

[0022] Preferably, a support plate is fixedly installed on the support member away from the driving torsion side, and the support plate is provided with an even arc surface, and a sponge pad is removably provided inside the arc surface.

[0023] Preferably, a rubber storage component is fixedly installed at the bottom of the positioning structure, and a pumping pipe connected to both sides of the rubber storage component is fixed thereto. A one-way valve is fixed inside each of the two pumping pipes. The two one-way valves are in the same direction, and a nozzle is detachably installed at the pumping end facing the side of the tray.

[0024] Compared with the prior art, the beneficial effects of the present invention are: by adjusting the diameter of the inflatable part to fit the patient's arm, and then by injecting gas into the inflatable part, the blood volume is filled and the veins are visible through the inflation of the inflatable part, which is painless and can be used by people with different arm circumferences.

[0025] Secondly, this device can quickly return to its initial state after completing a single task, ready for the next patient to use, further improving the device's working efficiency.

[0026] This application has a relatively simple structure, relatively low production cost, and high practicality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the protective shell in this invention;

[0029] Figure 3 for Figure 2 Partial structural decomposition diagram;

[0030] Figure 4 This is a schematic diagram of the internal structure of the mounting cavity in this invention;

[0031] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0032] Figure 6 for Figure 4 Another structural diagram from another angle;

[0033] Figure 7 for Figure 6 Enlarged view of point B in the middle;

[0034] Figure 8 This is a schematic diagram of the elastic trigger switch in this invention;

[0035] Figure 9 for Figure 8 Enlarged view of point C in the middle;

[0036] Figure 10 This is a schematic diagram of the structure of the active disk and the driven disk in this invention;

[0037] Figure 11 This is a partial structural diagram of the mounting cavity in this invention;

[0038] Figure 12 This is a schematic diagram of the structure of the rubber storage component and the nozzle in this invention.

[0039] In the diagram: 1. Support plate; 2. Protective shell; 3. Support component; 4. Drive torque; 5. Inlet; 6. Inflation component; 7. Adjusting block; 8. Positioning structure; 9. Elastic band; 10. Delivery pipe; 11. Air pump; 12. First rack plate; 13. Adjusting component; 14. Limiting protrusion; 15. Transmission cylinder; 16. Driving disc; 17. Driven disc; 18. First gear; 19. Second rack plate; 20. Guide groove; 21. Second gear; 22. First transmission rod; 23. Spring; 24. Second transmission rod; 25. Limiting ring; 26. Elastic limiting component; 27. Bevel gear set; 28. Elastic trigger switch; 29. ​​Rubber temporary storage component; 30. Nozzle. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1-12 The present invention provides a technical solution: an inflatable pulse pressure device for blood drawing, including a support member 3, the bottom of the support member 3 is provided with an installation cavity, and two adjusting blocks 7 are slidably installed on the support member 3;

[0042] An adjusting member 13 is provided, with its two ends fixed to opposite sides of the two adjusting blocks 7. An inflatable member 6 is sleeved on the outside of the adjusting member 13, with its two ends fixed to opposite sides of the two adjusting blocks 7. A first rack plate 12 is fixed to the bottom of each of the two adjusting blocks 7. The two first rack plates 12 mesh with a first gear 18 rotatably installed in the mounting cavity. The first gear 18 is located between the two first rack plates 12 and is connected to a driving member.

[0043] The adjusting member 13 is arranged in a spiral shape, and the starting end and the ending end of the adjusting member 13 are coplanar. The adjusting member 13 is made of high-toughness steel.

[0044] Furthermore, high-strength and high-toughness steel is not easily broken.

[0045] An air pump 11, the output end of which is connected to the inflation component 6 via a delivery pipe 10.

[0046] Furthermore, the support member 3 is provided with a cross-shaped limiting groove, and the bottom of the adjusting block 7 is provided with a limiting block. The limiting block and the cross-shaped limiting groove are slidably engaged. The sliding engagement between the cross-shaped limiting groove and the limiting block limits and guides the adjusting block 7.

[0047] The first gear 18 is driven to rotate clockwise or counterclockwise by the driving component. When the first gear 18 rotates, it meshes with the two first rack plates 12, causing the two first rack plates 12 to move relative to or in opposite directions. When the two first rack plates 12 move relative to or in opposite directions, they drive the two adjusting blocks 7 to move relative to or in opposite directions. When the two first rack plates 12 move in opposite directions, they pull the two ends of the adjusting component 13 to move in opposite directions, thereby reducing the internal diameter of the adjusting component 13. Similarly, when the two adjusting blocks 7 move relative to each other, they drive the internal diameter of the adjusting component 13 to increase, so as to accommodate people with different arm circumferences.

[0048] When the adjusting member 13 adjusts its internal diameter, it will drive the inflating member 6 to adjust accordingly. When the adjusting member 13 is adjusted to fit the patient's arm, the air pump 11 is driven to work. When the air pump 11 works, it injects gas into the inflating member 6 through the delivery tube 10, so that the inflating member 6 goes from a deflated state to a full state. At this time, because the adjusting member 13 fits the patient's arm, the inflating member 6 is also in a fitted state. When it expands, it squeezes the patient's arm to achieve the effect of a tourniquet.

[0049] In this embodiment, the inflatable component 6 is made of an airtight fabric composite material.

[0050] The inflatable component 6 is fitted with a protective shell 2 that is fixed to the support component 3. Multiple elastic bands 9 are fixed on the inner wall of the protective shell 2. The elastic bands 9 are fixed to the positioning component 8 that is slidably installed on the outside of the inflatable component 6.

[0051] Furthermore, to prevent the adjustment component 13 and the inflatable component 6 from dispersing during adjustment, a positioning component 8 is used for limiting their position. When the diameter of the inflatable component 6 and the adjustment component 13 decreases, the positioning component 8 will be driven to descend vertically. When the positioning component 8 descends, it pulls the elastic band 9 and stores a certain amount of elastic potential energy. The elastic potential energy of the elastic band 9 limits the position of the positioning component 8. When the diameter of the inflatable component 6 and the adjustment component 13 increases, the elastic potential energy of the elastic band 9 is released, causing the positioning component 8 to rise vertically.

[0052] The protective shell 2 has an opening 5.

[0053] A receiving plate is fixed inside the mounting cavity, and a driving disk 17 is rotatably mounted on the receiving plate. A driven disk 16 that cooperates with the driving disk 17 and is coaxially fixed with the first gear 18 is mounted on one side of the driving disk 17.

[0054] A second transmission rod 24 is rotatably mounted on the receiving plate. The second transmission rod 24 passes through one side of the support member 3. A drive torque 4 is coaxially fixed at the end of the second transmission rod 24. The second transmission rod 24 is connected to the rotating shaft of the drive disc 17 through a bevel gear set 27.

[0055] Furthermore, the drive torque 4 is rotated by an external force. When the drive torque 4 rotates, it drives the second transmission rod 24 to rotate. When the second transmission rod 24 rotates, it drives the drive disc 17 to rotate through the bevel gear set 27. When the drive disc 17 rotates one revolution, it drives the driven disc 16 to rotate one-quarter of the way. When there is no transmission relationship between the drive disc 17 and the driven disc 16, the drive disc 17 applies a self-locking mechanism to the driven disc 16. When the driven disc 16 rotates, it drives the first gear 18 to rotate accordingly.

[0056] In this embodiment, the driven disc 16 and the driving disc 17 adopt the Maltese cross movement of the prior art, which will not be elaborated on here.

[0057] A transmission cylinder 15 is sleeved on the outer side of the second transmission rod 24. Multiple transmission grooves are equally spaced on the inner circumference of the transmission cylinder 15. The transmission grooves slide in cooperation with the transmission bar that is fixed to the outer side of the second transmission rod 24. The drive torque 4 is coaxially fixed to the end of the transmission cylinder 15.

[0058] A limiting ring 25 is fixed to the outer side of the end of the transmission cylinder 15 away from the driving torque 4, and the limiting ring 25 cooperates with the elastic limiting member 26 fixed on the receiving plate.

[0059] The receiving plate has an assembly slot, and an elastic trigger switch 28 is installed in the assembly slot. The elastic trigger switch 28 is connected to the air pump 11 through a wire, and the elastic trigger switch 28 cooperates with the limiting ring 25.

[0060] Furthermore, the drive torque 4 is driven to rotate by an external force. When the drive torque 4 rotates, the transmission cylinder 15 rotates accordingly. When the transmission cylinder 15 rotates, the second transmission rod 24 rotates through the cooperation of the transmission groove and the transmission bar. When the second transmission rod 24 rotates, the drive disc 17 rotates through the bevel gear set 27. After the bevel gear set 27 is driven to rotate, the internal diameter of the adjusting member 13 is adjusted. When it is adjusted to a suitable state, the drive torque 4 is pushed to move radially along the transmission cylinder 15 so that the transmission cylinder 15 can follow the movement through the drive torque 4. When the transmission cylinder 15 moves to the end, the two elastic limiting members 26 are driven to move in opposite directions through the limiting ring 25 to make way. When the limiting ring 25 is reset by the elastic limiting members 26, the limiting ring 25 is limited.

[0061] When the transmission cylinder 15 moves radially, it also triggers the elastic trigger switch 28 through the limit ring 25. When the elastic trigger switch 28 is triggered, it drives the air pump 11 to work. The elastic trigger switch 28 is elastically hinged and is only triggered when pressed by external force. When the external force disappears, the triggering state stops.

[0062] The drive knob 4 is provided with a gripping groove and an anti-slip strip;

[0063] It should also be noted that the second transmission rod 24 in this embodiment includes two meshing bevel gears, which are coaxially fixed with the second transmission rod 24 and the drive disc 17 respectively, and the limiting member 26 is elastically set.

[0064] The second transmission rod 24 is coaxially fixed to the end away from the driving torque 4 with the first transmission rod 22, and the first transmission rod 22 is coaxially fixed with the second gear 21.

[0065] A second rack plate 19 that meshes with the second gear 21 is slidably installed on the inner wall of the support member 3. A spring 23 is fixed at one end of the second rack plate 19. The end of the spring 23 away from the second rack plate 19 is fixed to the inner wall of the support member 3. A positioning structure is provided on the opposite side of the drive torque 4 and the support member 3.

[0066] The positioning structure includes a limiting protrusion 14 fixedly installed on the side of the support member 3 facing the driving torque 4. The limiting protrusion 14 is equidistantly arranged in a circle. The driving torque 4 has a plurality of positioning holes equidistantly arranged in a circle on the side of the support member 3 that cooperate with the limiting protrusion 14.

[0067] Furthermore, when a limit is required, the drive torque 4 is pushed to move radially by an external force. When the drive torque 4 moves to the end, the limit protrusion 14 is inserted into the positioning hole to limit the drive torque 4, so that the drive torque 4 cannot rotate.

[0068] When the limit is released, the drive torque 4 is pulled away from the support member 3 by external force, so that the limit protrusion 14 is disengaged from the positioning groove and the limit is released.

[0069] Furthermore, when the drive torque 4 is driven by external force, the first drive rod 22 is rotated through the second drive rod 24. When the first drive rod 22 rotates, it drives the second gear 21, which is fixed on the same axis, to rotate as well. When the second gear 21 rotates, it meshes with the second rack plate 19, causing the second rack plate 19 to move horizontally and to stretch or compress the spring 23, so that the spring 23 stores a certain amount of elastic potential energy. Finally, the drive torque 4 is limited by the positioning structure. After the blood draw is completed, the limitation of the positioning structure is released. When the limitation is released, the elastic potential energy stored in the spring 23 is released to drive the second rack plate 19 to reset, so as to drive the second gear 21 to rotate in the opposite direction. The second gear 21 rotates in the opposite direction, which drives the transmission cylinder 15 to rotate in the opposite direction. The effect is that when the limitation is released, the second drive rod 24 is immediately driven to rotate in the opposite direction, which increases the internal diameter of the adjusting part 13. This makes it convenient for the patient to remove the arm, and at the same time, it resets the device to the ready-to-work state.

[0070] A T-shaped block integrally formed therewith is provided on one side of the second rack plate 19, and the prime number T-shaped block slides in conjunction with the guide groove 20 opened in the mounting cavity.

[0071] The support member 3 is fixedly installed with a support plate 1 on the side away from the drive torque 4. The support plate 1 is provided with an even arc surface, and a sponge pad is removable inside the arc surface.

[0072] Furthermore, the support plate 1 and the cotton pad can support the patient's arm, making the blood draw more comfortable.

[0073] Please refer to body 12. A rubber storage component 29 is fixedly installed at the bottom of the positioning structure 8. Both sides of the rubber storage component 29 are fixed with a pumping pipe communicating with it. One-way valves are fixed inside the two pumping pipes. The two one-way valves are in the same direction, and a nozzle 30 is detachably installed at the pumping end facing the side of the tray 1.

[0074] Furthermore, the end without the nozzle 30 is connected to a storage box fixed inside the protective shell 2. The storage box contains disinfectant alcohol. When the inflator 6 is close to the patient's skin, the rubber storage component 29 is not compressed when it is not inflated. When inflating, squeezing the rubber storage component 29 causes the disinfectant alcohol inside to be sprayed onto the patient's arm through the delivery tube and the nozzle 30. After the blood draw is completed and the patient's arm is withdrawn, the rubber storage component 29 naturally rebounds. Due to the suction generated during the over-inflation of the rubber storage component 29, the disinfectant alcohol is drawn back into the rubber storage component 29 for the next use.

[0075] In summary, this application adjusts the internal diameter of the inflatable component 6 to fit the patient's arm, and then injects gas into the inflatable component 6. The inflation of the inflatable component 6 causes the blood volume to fill and the veins to become visible. This method is painless and can be used by people with different arm circumferences.

[0076] Secondly, this device can quickly return to its initial state after completing a single task, ready for the next patient to use, further improving the device's working efficiency.

[0077] This application has a relatively simple structure, relatively low production cost, and high practicality.

[0078] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0079] 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. A pneumatic pulse-compression device for blood drawing, characterized in that, include: Support member (3), the bottom of the support member (3) is provided with an installation cavity, and two adjusting blocks (7) are slidably installed on the support member (3); Adjusting component (13), the adjusting component (13) is spiral-shaped and made of high toughness steel, and the starting end and the end end of the adjusting component (13) are coplanar. The two ends of the adjusting component (13) are respectively fixed to the opposite side of the two adjusting blocks (7). An inflatable component (6) is sleeved on the outside of the adjusting component (13). The two ends of the inflatable component (6) are fixed to the opposite side of the two adjusting blocks (7). The bottom of each of the two adjusting blocks (7) is fixed with a first rack plate (12). The two first rack plates (12) mesh with a first gear (18) rotatably installed in the mounting cavity. The first gear (18) is located between the two first rack plates (12) and is connected to a driving component. A receiving plate is fixed inside the mounting cavity. A drive disc (17) is rotatably mounted on the receiving plate. A driven disc (16) that cooperates with the drive disc (17) and is coaxially fixed with the first gear (18) is mounted on one side of the drive disc (17). A second transmission rod (24) is rotatably mounted on the receiving plate. The second transmission rod (24) passes through one side of the support member (3). A drive torque (4) is coaxially fixed at the end of the second transmission rod (24). The second transmission rod (24) is connected to the shaft of the drive disc (17) through a bevel gear set (27). The second transmission rod (24) is fitted with a transmission cylinder (15) on the outside. Multiple transmission grooves are equidistantly opened on the inner circumference of the transmission cylinder (15). The transmission grooves are slidably engaged with the transmission bar fixed equidistantly on the outside of the second transmission rod (24). The driving torque (4) is coaxially fixed to the end of the transmission cylinder (15). A limit ring (25) is fixed on the outer side of the end of the transmission cylinder (15) away from the drive torque (4). The limit ring (25) cooperates with two elastic limit pieces (26) fixed on the receiving plate. An assembly groove is provided on the receiving plate. An elastic trigger switch (28) is installed in the assembly groove. The elastic trigger switch (28) is connected to the air pump (11) through a wire. The elastic trigger switch (28) cooperates with the limit ring (25). An air pump (11) is connected to the inflation component (6) via a delivery pipe (10) at its output end.

2. The pneumatic pulse-compression device for blood drawing according to claim 1, characterized in that: The outer side of the inflatable component (6) is fitted with a protective shell (2) that is fixed to the support (3). Multiple elastic bands (9) are fixed on the inner wall of the protective shell (2). The elastic bands (9) are fixed to the positioning component (8) that is slidably installed on the outer side of the inflatable component (6).

3. The pneumatic pulse-compression device for blood drawing according to claim 1, characterized in that: The second transmission rod (24) is coaxially fixed to the end away from the driving torque (4) with the first transmission rod (22), and the first transmission rod (22) is coaxially fixed with the second gear (21); the inner wall of the support member (3) is slidably installed with the second rack plate (19) meshing with the second gear (21), and the second rack plate (19) is fixed with a spring (23) at one end. The end of the spring (23) away from the second rack plate (19) is fixed to the inner wall of the support member (3). The driving torque (4) and the support member (3) are provided with a positioning structure on opposite sides.

4. The pneumatic pulse-compression device for blood drawing according to claim 3, characterized in that: The positioning structure includes a limiting protrusion (14) fixedly installed on the support member (3) on the side facing the drive torque (4). The limiting protrusion (14) is equidistantly arranged in a circle. The drive torque (4) on the side facing the support member (3) has a plurality of positioning holes that cooperate with the limiting protrusion (14).

5. The pneumatic pulse-compression device for blood drawing according to claim 2, characterized in that: The support member (3) is fixedly installed with a tray (1) on the side away from the drive torque (4). The tray (1) has an arc-shaped surface and a sponge pad that can be detached inside the arc-shaped surface.

6. The pneumatic pulse-compression device for blood drawing according to claim 5, characterized in that: The bottom of the positioning component (8) is fixedly installed with a rubber storage component (29). Both sides of the rubber storage component (29) are fixed with a pumping pipe connected to it. Both pumping pipes are fixed with a one-way valve. The two one-way valves are in the same direction. The pumping pipe end facing the tray (1) is detachably installed with a nozzle (30).

Images