Multifunctional tourniquet for controlling bleeding in boundary area under field conditions

Abstract

The present application relates to the technical field of tourniquet, in particular to a multifunctional tourniquet for controlling bleeding in the junctional area under field conditions, comprising a tourniquet assembly. The present application ingeniously locks the tourniquet body and the human body limb by setting two groups of anti-skid mechanisms comprising fixing belts, positioning plates, clamping blocks and device sleeves. When the clamping blocks are precisely inserted into the clamping grooves on both sides of the device sleeve under the action of the spring restoring force, a rigid closed structure surrounding the limb is formed. This structure can effectively resist the axial shear force generated by the movement of the wounded, the change of body position or the contraction of limb muscles. At the same time, the linkage system composed of the device sleeve and the positioning belt can disperse the local stress. Even if there is sweat or blood on the surface to cause lubrication, the mechanical self-locking design of the multi-point clamping can also prevent the overall tourniquet from sliding or twisting, so as to maintain constant ring pressure and position in the dynamic jolt environment of field evacuation, greatly reducing the risk of tourniquet failure and secondary bleeding caused by instrument displacement.

Description

Technical Field

[0001] This invention relates to the field of tourniquet technology, specifically a multifunctional tourniquet for controlling bleeding in border areas under field conditions. Background Technology

[0002] The multi-functional tourniquet for controlling bleeding in border areas under field conditions is a modular hemostatic device specifically designed for the complex battlefield environment. It is primarily used to treat fatal hemorrhages at the junction of limbs and torso (such as the groin, armpit, and neck / shoulder areas, where traditional tourniquets are difficult to apply pressure effectively). This type of bleeding is often caused by shrapnel from explosions or bullets, and is rapid and a leading cause of preventable death on the battlefield. Its core function is to quickly control bleeding in special areas that conventional tourniquets cannot handle within the golden rescue time, buying precious time for the evacuation of the wounded. It typically employs a composite design, integrating inflatable airbags, high-strength bandages, and locking devices. In use, the operator wraps the main band around the torso and inflates the specially shaped airbag manually or with a pneumatic pump, applying directional, adjustable annular pressure to deep wounds and severed blood vessels, effectively closing blood vessels without relying on encircling compression of the limb bones. Some models also feature pressure indicators and short-term stability maintenance functions to ensure hemostasis. This equipment significantly enhances the frontline's ability to provide first aid for complex injuries and is a key tool for reducing the mortality rate of seriously wounded soldiers. Its portability, speed, and efficiency make it an important piece of equipment in modern individual and tactical medical kits.

[0003] However, due to the special nature of the environment, existing multi-functional tourniquets are prone to displacement or loosening during the movement and evacuation of the injured person, as well as changes in body position, sweat, blood lubrication, and muscle contraction, thus losing their hemostatic effect. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional tourniquet for controlling bleeding in border areas under field conditions. It solves the problem that due to the special nature of the environment, the tourniquet is prone to displacement or loosening and lose its hemostatic effect during the movement and evacuation of the wounded, due to changes in body position, sweat, blood lubrication, and muscle contraction.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A multifunctional tourniquet for controlling bleeding in border areas under field conditions, comprising: A tourniquet assembly, wherein a pressure airbag assembly is installed on the outer surface of the tourniquet body, a connecting strap is installed on the back of the tourniquet body, a collar is provided on the back of the tourniquet body, the connecting strap passes through the collar away from the tourniquet body, an insert is installed at the end of the connecting strap away from the tourniquet body, and a retainer is installed on the outer surface of the collar. An anti-slip mechanism is used to prevent the tourniquet body from slipping off the body. The anti-slip mechanism includes a positioning plate, one end of which is fixedly connected to a locking block. A device sleeve is provided below the tourniquet body, and the device sleeve has locking grooves on both sides.

[0006] Furthermore, the anti-slip mechanism also includes: The fixing strap is fixedly connected to the top of the tourniquet body at one end, and a fixing plate is fixedly connected to the end of the fixing strap away from the tourniquet body. A rotating rod is rotatably connected to the top of the fixing plate, and the circumferential surface of the rotating rod is fixedly connected to the end of the positioning plate away from the locking block. A fixing rod is fixedly connected to the top of the fixing plate, and a spring is fixedly connected to one side of the fixing rod. A positioning belt is fixedly connected to the bottom of the tourniquet body.

[0007] Furthermore, the anti-slip mechanism is provided in two sets, respectively located on both sides of the vertical central axis of the tourniquet body, and the end of the spring away from the fixing rod is fixedly connected to one side of the positioning plate.

[0008] Furthermore, it also includes an adjustment mechanism for adjusting the tightness of the anti-slip mechanism; The adjustment mechanism includes: A rectangular plate, one end of which is fixedly connected to the top of the device sleeve, a connecting rod A is fixedly connected to one side of the rectangular plate, a stop bar is fixedly connected to the end of the positioning belt away from the hemostat body, and a limit sleeve is slidably sleeved on the outer surface of the positioning belt. Limiting plates are set on both sides of the positioning belt. A connecting rod B is fixedly connected to the side of the limiting plate closest to the positioning belt, and a connecting rod C is fixedly connected to the end of the limiting plate closest to the connecting rod B.

[0009] Furthermore, there is a gap between the connecting rod A and the device sleeve; The end of the positioning band away from the tourniquet body passes through the gap; The end of the positioning band near the stop bar passes through the limiting sleeve and is slidably connected to the limiting sleeve.

[0010] Furthermore, the two connecting rods B are symmetrical to each other along the horizontal central axis of the limiting plate; The connecting rod C is located between the two connecting rods B; There is a gap between connecting rod B and connecting rod C.

[0011] Furthermore, the end of the positioning band away from the tourniquet body passes through the gap, and the limiting sleeve is located on the displacement trajectory of the stop bar.

[0012] Furthermore, the number of the card blocks is four, arranged in pairs, and symmetrical to each other along the vertical central axis of the tourniquet body; The top of the card block is provided with a slope; The bottom of the device sleeve is located on the displacement trajectory of the inclined surface of the card block.

[0013] Furthermore, the slot is located on the displacement trajectory of the card block, and the card block is engaged with the device through the slot.

[0014] Furthermore, it also includes a pressure monitoring module for real-time monitoring of the inflation pressure of the airbag assembly; The pressure monitoring module includes a pressure sensor, a main control unit, a display unit, an early warning unit, a power supply unit, and operation buttons; The signal output terminal of the pressure sensor is electrically connected to the main control unit; the display unit, early warning unit, power supply unit, and operation buttons are all electrically connected to the main control unit.

[0015] By employing the above technical solution, this invention provides a multifunctional tourniquet for controlling bleeding in border areas under field conditions. It possesses at least the following beneficial effects: This invention cleverly and securely locks the tourniquet body to the human limb by setting two sets of anti-slip mechanisms, each including a fixing strap, positioning plate, locking blocks, and a device sleeve. When the locking blocks precisely engage with the slots on both sides of the device sleeve under the action of spring return force, a rigid closed structure encircling the limb is formed. This structure effectively resists axial shear forces generated by the movement of the wounded, changes in body position, or muscle contraction of the limb. Simultaneously, the linkage system formed by the device sleeve and positioning strap disperses local stress. Even if there is sweat or blood on the body surface causing lubrication, its multi-point locking mechanical self-locking design prevents the tourniquet from sliding or twisting as a whole, thus maintaining constant circumferential pressure and position in the dynamic and bumpy environment of field evacuation, greatly reducing the risk of hemostasis failure and secondary bleeding due to instrument displacement. This invention achieves rapid, stepless, and stable adjustment of the tourniquet's circumference through the synergistic action of a positioning band, connecting rod, limiting sleeve, and stop bar. The user simply pulls the free end of the positioning band to easily tighten it. After wrapping it around the connecting rod, the mechanical anti-reverse mechanism formed by the limiting sleeve and stop bar automatically locks the positioning band, preventing it from retracting and loosening. This process requires no complex operation or additional tools and can be completed with one hand, making it particularly suitable for tense battlefield environments or self-rescue and mutual aid scenarios. This design, which ensures sufficient locking force to prevent slippage while also providing convenient adjustability, ensures that the tourniquet can quickly adapt to wounded soldiers of different body sizes and changes in limb swelling, maintaining a long-lasting and effective pressure hemostasis. This invention achieves multiple uses with a single strap through the combination of an adhesive base and a modular fixing strap. The adhesive backing design allows for immediate fixation, buying time for subsequent inflation and pressurization. The manual inflation design is especially convenient for injured persons to perform self-rescue in adverse environments. The digital pressure display and intelligent alarm system ensure the effectiveness and safety of blood pressure control, minimizing complications caused by improper pressure, ensuring the stability of the device during strenuous exercise and long-distance transport, and preventing secondary bleeding. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention, form part of this application: Figure 1 This is a schematic diagram of a multifunctional tourniquet for controlling bleeding in border areas under field conditions, according to the present invention. Figure 2 This is a rear-view three-dimensional structural diagram of the tourniquet body in this invention; Figure 3 This is a three-dimensional structural diagram of the positioning strip in this invention; Figure 4 This is a three-dimensional cross-sectional structural diagram of connecting rod A in this invention; Figure 5 In this invention Figure 2 A 3D magnified view of A in the middle; Figure 6 In this invention Figure 1 A 3D magnified view of B in the image; Figure 7 The structural block diagram of the pressure monitoring module provided by the present invention.

[0017] In the diagram: 1. Tourniquet assembly; 101. Tourniquet body; 102. Pressure cuff assembly; 103. Connecting strap; 104. Loop; 105. Clip; 106. Insert block; 2. Anti-slip mechanism; 201. Fixing strap; 202. Fixing plate; 203. Rotating rod; 204. Positioning plate; 205. Locking block; 206. Fixing rod; 207. Spring; 208. Positioning strap; 209. Device sleeve; 210. Slot; 3. Adjustment mechanism; 301. Rectangular plate; 302. Connecting rod A; 303. Stop bar; 304. Limiting sleeve; 305. Limiting plate; 306. Connecting rod B; 307. Connecting rod C; 4. Pressure monitoring module; 401. Pressure sensor; 402. Main control unit; 403. Display unit; 404. Early warning unit; 405. Power supply unit; 406. Operation buttons. Detailed Implementation

[0018] 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.

[0019] Please refer to Figures 1-6In one embodiment of the present invention, a multifunctional tourniquet for controlling bleeding in the border area under field conditions is provided, including a tourniquet assembly 1. The tourniquet assembly 1 includes a tourniquet body 101. A pressure airbag assembly 102 is installed on the outer surface of the tourniquet body 101. A connecting strap 103 is installed on the back of the tourniquet body 101. A collar 104 is provided on the back of the tourniquet body 101. The connecting strap 103 passes through the collar 104 away from the tourniquet body 101. An insert 106 is installed at one end of the connecting strap 103 away from the tourniquet body 101. A retainer 105 is installed on the outer surface of the collar 104. Furthermore, the present invention also includes an anti-slip mechanism 2 for preventing the tourniquet body 101 from slipping off the body; specifically, the anti-slip mechanism 2 in this embodiment includes a positioning plate 204, one end of which is fixedly connected to a locking block 205, and a device sleeve 209 is provided below the tourniquet body 101, with locking grooves 210 on both sides of the device sleeve 209; the anti-slip mechanism 2 also includes a fixing strap 201, one end of which is fixedly connected to the top of the tourniquet body 101, and the end of the fixing strap 201 away from the tourniquet body 101 is fixedly connected to a fixing... Plate 202, fixed plate 202 has a rotating rod 203 rotatably connected to the top of the plate. The circumferential surface of the rotating rod 203 is fixedly connected to the end of the positioning plate 204 away from the locking block 205. Fixed plate 202 has a fixed rod 206 fixedly connected to the top of the plate. Fixed rod 206 has a spring 207 fixedly connected to one side of the fixed rod 206. The tourniquet body 101 has a positioning belt 208 fixedly connected to the bottom. The above design is conducive to the fixed connection between the rotating rod 203 and the positioning plate 204 away from the locking block 205, so that when the rotating rod 203 rotates, it can drive the positioning plate 204 to perform circumferential motion.

[0020] In one implementation, the anti-slip mechanism 2 of the present invention is provided in two sets, respectively located on both sides of the vertical central axis of the tourniquet body 101. The end of the spring 207 away from the fixing rod 206 is fixedly connected to one side of the positioning plate 204. The above design is advantageous because the fixed connection between the spring 207 and the positioning plate 204 enables the positioning plate 204 to be pushed by the restoring property of the spring 207 after the locking block 205 is aligned with the locking groove 210, thereby driving the locking block 205 to be embedded into the locking groove 210 on the device sleeve 209.

[0021] For further details, please refer to [link / reference]. Figures 1-6The tourniquet of this embodiment also includes an adjustment mechanism 3, which is used to adjust the tightness of the anti-slip mechanism 2. The adjustment mechanism 3 includes a rectangular plate 301, one end of which is fixedly connected to the top of the device sleeve 209. A connecting rod A302 is fixedly connected to one side of the rectangular plate 301. A stop rod 303 is fixedly connected to one end of the positioning band 208 away from the tourniquet body 101. A limiting sleeve 304 is slidably sleeved on the outer surface of the positioning band 208. Limiting plates 305 are provided on both sides of the positioning band 208. A connecting rod B306 is fixedly connected to one side of the limiting plate 305 near the positioning band 208. A connecting rod C307 is fixedly connected to one end of the limiting plate 305 near the connecting rod B306. The above design is beneficial to positioning the device sleeve 209 by fixing the rectangular plate 301 to the device sleeve 209.

[0022] Preferably, there is a gap between the connecting rod A302 and the device sleeve 209 of the present invention. The end of the positioning band 208 away from the tourniquet body 101 passes through the gap, and the end of the positioning band 208 near the stop bar 303 passes through the limiting sleeve 304 and is slidably connected to the limiting sleeve 304. The above design is beneficial to the fact that by passing the positioning band 208 through the gap between the connecting rod A302 and the device sleeve 209, it is easy to pull the end of the positioning band 208 near the stop bar 303 to achieve the function of adjusting the length of the positioning band 208.

[0023] In one implementation, the present invention has two connecting rods B306, which are symmetrical to each other along the horizontal central axis of the limiting plate 305. The connecting rod C307 is located between the two connecting rods B306, and there is a gap between the connecting rods B306 and C307. The above design facilitates the positioning band 208 to be wrapped around the outer surface of the connecting rod C307 through the two connecting rods B306.

[0024] Furthermore, the end of the positioning band 208 away from the tourniquet body 101 passes through the gap, and the limiting sleeve 304 is located on the displacement trajectory of the stop bar 303. The above design is beneficial to limit the positioning band 208 by the limiting sleeve 304 being located on the displacement trajectory of the stop bar 303, thereby preventing the positioning band 208 from falling off.

[0025] In addition, the present invention has four locking blocks 205, arranged in pairs and symmetrical to each other along the vertical central axis of the tourniquet body 101. The top of the locking block 205 is provided with an inclined surface, and the bottom of the device sleeve 209 is located on the displacement trajectory of the inclined surface of the locking block 205. The above design is advantageous for inserting the four locking blocks 205 into the slots 210 in the device sleeve 209, thereby connecting the fixing band 201 and the positioning band 208.

[0026] The slot 210 is located on the displacement trajectory of the block 205. The block 205 is engaged with the device sleeve 209 through the slot 210. The above design facilitates the use of the block 205 to engage with the device sleeve 209, and then the human arm is passed through the connected fixing strap 201 and positioning strap 208 to fix the human body and prevent the tourniquet assembly 1 from slipping off the patient.

[0027] Furthermore, the present invention also includes a pressure monitoring module 4, which is used to monitor the inflation pressure of the pressurized airbag assembly 102 in real time, control the hemostasis ligation pressure, and trigger multi-mode early warning when the pressure is abnormal, thereby improving the hemostasis effectiveness and operational safety under field conditions.

[0028] The pressure monitoring module includes a pressure sensor 401, a main control unit 402, a display unit 403, an early warning unit 404, a power supply unit 405, and operation buttons 406.

[0029] The pressure sensor 401 is an impact-resistant piezoresistive pressure sensor. The detection end of the pressure sensor 401 is connected to the inflation chamber of the inflatable airbag assembly 102 via a medical-grade sealed connector, or connected in series in the manual inflation line of the inflatable airbag assembly 102, to collect real-time air pressure values ​​inside the airbag. Its signal output end is electrically connected to the main control unit 402 via a flexible waterproof flat wire. The sensor as a whole undergoes IPX7 waterproof sealing treatment, which can withstand immersion in blood and sweat and impacts during field operations, making it suitable for complex battlefield environments. The main control unit 402 is an MCU microcontroller, soldered onto a rigid PCB board. The PCB board is fully encapsulated with epoxy waterproof adhesive and can be detachably fixed to the outer surface of the tourniquet body 101 and the side of the pressure bag assembly 102 using medical-grade Velcro or snap-on structures. The main control unit 402 has built-in preset thresholds for combat injury first aid standards, such as a safe hemostasis range of 250-350 mmHg for the upper limbs and a safe hemostasis range of 400-600 mmHg for the lower limbs / junctional areas. It can receive real-time pressure signals from the pressure sensor 401 and complete data processing, threshold comparison, and command output. The display unit 403 is electrically connected to the main control unit 402. It uses an LCD screen and is covered with a scratch-resistant and wear-resistant polycarbonate waterproof lens. It is embedded in the sealed housing surface of the main control unit 402 and is used to display the current airbag pressure value, remaining battery power and working mode in real time. The warning unit 404 is electrically connected to the main control unit 402 and integrates a high sound pressure level waterproof buzzer, a red / green dual-color LED warning light and a micro vibration motor. All components share a sealed housing with the main control unit 402 and are simultaneously treated with IPX7 waterproof level. The power supply unit 405 uses a disposable medical lithium manganese button battery pack, which is encapsulated inside the sealed housing of the main control unit 402 to power the entire pressure monitoring module.

[0030] The operation button 406 is embedded in the surface of the sealed housing and is electrically connected to the main control unit 402; The pressure monitoring module 4 provided by this invention realizes the visualization, controllability and active early warning of abnormal tourniquet pressure, and solves the problems of uncontrollable tourniquet pressure, unreliable hemostasis effect and high risk of complications under field conditions.

[0031] In use, the first step is rapid circumduction and initial fixation. The operator wraps the tourniquet body 101 of the tourniquet assembly 1 around the proximal end of the bleeding point on the injured limb. By passing the insert 106 of the free end of the connecting strap 103 through the loop 104 and inserting it into the clamp 105, the basic circumduction and fastening are completed, just like a traditional tourniquet. At this time, the operator presses the operation button 406 of the pressure monitoring module 4 to turn it on. According to the bleeding site of the injured, the operator switches the pressure threshold mode corresponding to the upper limb / lower limb (junction area) by pressing the button. The display unit 403 lights up and displays the initial pressure value of the pressure bag assembly 102 in real time, completing the monitoring preparation. Secondly, the core anti-slip mechanism 2 is activated and rigidly locked. After initial fixation, the two sets of anti-slip mechanisms 2 built into the device begin to play a key role. The fixing band 201 located above the tourniquet body 101 and its end fixing plate 202, together with the positioning band 208 located below, form a preliminary secondary fixing ring. When it is necessary to enhance the anti-slip performance, the operator pulls out the free end of the positioning band 208, so that it passes through the gap formed between the connecting rod A302 on one side of the rectangular plate 301 and the top of the device sleeve 209. The key is that the rotating rod 203 located on the fixing plate 202 can drive the positioning plate 208. 04 and its end locking block 205 rotate. When the locking block 205 aligns with the slots 210 on both sides of the device sleeve 209 connected to the positioning belt 208, the positioning plate 204 quickly resets under the push of the spring 207's return force, causing the two pairs of locking blocks 205 to precisely embed into the corresponding slots 210. This is equivalent to adding a multi-point, self-locking "pin-socket" type rigid connection at the soft webbing connection, firmly locking the upper and lower straps together to form a closed, reinforcing ring that is not easily loosened due to changes in body shape. Finally, there is the tension adjustment. During the fine-tuning and final locking phase, after the anti-slip mechanism 2 closes, the circumference of the entire device may not yet reach optimal tightness. At this time, the adjusting mechanism 3 comes into play, and the operator can continue to pull the end of the positioning band 208 that passes through the device sleeve 209. The stop bar 303 on it moves accordingly, limiting its position through the friction between the materials of the positioning band 208. When the ideal tightness is achieved and the redundant gap between the tourniquet and the limb skin is completely eliminated, the limiting sleeve 304 slides along the positioning band 208 until it abuts against the stop bar 303. The limiting sleeve 304 and the stop bar 303 constitute a simple mechanical check valve. The valve prevents the positioning band 208 from sliding back into the gap under tension, thus firmly locking the adjusted length. The inclined surface design on the top of the locking block 205 allows it to slide smoothly into the slot 210 even if the device sleeve 209 and the locking block 205 are not fully aligned during the closing process, improving the fault tolerance and speed of operation. It not only provides initial hemostatic pressure, but also actively counteracts the displacement trend caused by movement, lubrication and muscle volume changes during the delivery process through a unique anti-slip locking design, thus achieving stable maintenance of hemostatic effect under dynamic field conditions. In addition, during the entire process of the subsequent transfer of the injured, the pressure monitoring module 4 continuously monitors the airbag pressure in real time: when the pressure is lower than the lower limit of the safety threshold due to factors such as slow air leakage of the airbag, changes in limb swelling, and changes in body position, the main control unit 402 immediately triggers the early warning unit 404, which reminds the rescuer to replenish the air pressure in time through a multi-mode early warning system, including flashing red lights, intermittent beeping of the buzzer, and synchronous vibration of the vibration motor, so as to avoid the failure of hemostasis and secondary bleeding due to insufficient pressure.

[0032] 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 a process, method, article, or apparatus.

[0033] 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 multifunctional tourniquet for controlling bleeding in border areas under field conditions, characterized in that, include: A tourniquet assembly (1) is provided with a pressure airbag assembly (102) installed on the outer surface of the tourniquet body (101) of the tourniquet assembly (1), a connecting strap (103) installed on the back of the tourniquet body (101), a collar (104) provided on the back of the tourniquet body (101), the connecting strap (103) passing through the collar (104) away from the tourniquet body (101), an insert (106) installed at the end of the connecting strap (103) away from the tourniquet body (101), and a retainer (105) installed on the outer surface of the collar (104). The anti-slip mechanism (2) is used to prevent the tourniquet body (101) from slipping off the body. The anti-slip mechanism (2) includes a positioning plate (204), one end of which is fixedly connected to a locking block (205). A device sleeve (209) is provided below the tourniquet body (101), and slots (210) are provided on both sides of the device sleeve (209).

2. The multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 1, characterized in that, The anti-slip mechanism (2) also includes: A fixing strap (201) is fixedly connected at one end to the top of the tourniquet body (101). A fixing plate (202) is fixedly connected at the end of the fixing strap (201) away from the tourniquet body (101). A rotating rod (203) is rotatably connected to the top of the fixing plate (202). The circumferential surface of the rotating rod (203) is fixedly connected to the end of the positioning plate (204) away from the locking block (205). A fixing rod (206) is fixedly connected to the top of the fixing plate (202). A spring (207) is fixedly connected to one side of the fixing rod (206). A positioning belt (208) is fixedly connected to the bottom of the tourniquet body (101).

3. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 2, characterized in that, The anti-slip mechanism (2) is provided in two sets, which are respectively set on both sides of the vertical central axis of the tourniquet body (101). The end of the spring (207) away from the fixing rod (206) is fixedly connected to one side of the positioning plate (204).

4. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 2, characterized in that, It also includes an adjustment mechanism (3) for adjusting the tightness of the anti-slip mechanism (2); The adjustment mechanism (3) includes: A rectangular plate (301) is fixedly connected at one end to the top of the device sleeve (209). A connecting rod A (302) is fixedly connected to one side of the rectangular plate (301). A stop bar (303) is fixedly connected to the end of the positioning band (208) away from the tourniquet body (101). A limit sleeve (304) is slidably sleeved on the outer surface of the positioning band (208). Limiting plate (305), two limiting plates (305) are set on both sides of positioning belt (208), a connecting rod B (306) is fixedly connected to the side of the limiting plate (305) near the positioning belt (208), and a connecting rod C (307) is fixedly connected to the end of the limiting plate (305) near the connecting rod B (306).

5. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 4, characterized in that, There is a gap between the connecting rod A (302) and the device sleeve (209); The end of the positioning band (208) away from the tourniquet body (101) passes through the gap; The end of the positioning band (208) near the stop bar (303) passes through the limiting sleeve (304) and is slidably connected to the limiting sleeve (304).

6. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 4, characterized in that, The two connecting rods B (306) are symmetrical to each other along the horizontal central axis of the limiting plate (305); The connecting rod C (307) is located between the two connecting rods B (306); There is a gap between the connecting rod B (306) and the connecting rod C (307).

7. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 4, characterized in that, The end of the positioning band (208) away from the tourniquet body (101) passes through the gap, and the limiting sleeve (304) is located on the displacement trajectory of the stop bar (303).

8. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 2, characterized in that, The number of the card blocks (205) is four, in pairs, and symmetrical to each other along the vertical central axis of the tourniquet body (101); The top of the card block (205) is provided with a slope; The bottom of the device sleeve (209) is located on the displacement trajectory of the inclined surface of the card block (205).

9. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 2, characterized in that, The slot (210) is located on the displacement trajectory of the block (205), and the block (205) is engaged with the device sleeve (209) through the slot (210).

10. A multifunctional tourniquet for controlling bleeding in border areas under field conditions according to claim 9, characterized in that, It also includes a pressure monitoring module (4) for real-time monitoring of the inflation pressure of the pressurized airbag assembly (102); The pressure monitoring module (4) includes a pressure sensor (401), a main control unit (402), a display unit (403), an early warning unit (404), a power supply unit (405), and operation buttons (406). The signal output terminal of the pressure sensor (401) is electrically connected to the main control unit (402); the display unit (403), the early warning unit (404), the power supply unit (405) and the operation button (406) are all electrically connected to the main control unit (402).

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