An automatic inflation tourniquet

Abstract

This application discloses an automatic inflatable tourniquet, comprising: a compression band defining a receiving cavity, the receiving cavity having an air inlet located outside the compression band; a cover structure covering the air inlet; a sealing plate slidably mounted on the cover structure, the sealing plate having a control valve capable of closing the air inlet; a drive structure mounted on the cover structure and connected to the sealing plate; a sensing structure mounted inside the compression band, the sensing structure being electrically connected to the drive structure; a filling structure configured to be compressed and filled within the receiving cavity; and a locking band for tightening the compression band. The drive structure drives the sealing plate to slide according to the sensing signal from the sensing structure, causing the control valve to be misaligned with the air inlet, allowing the receiving cavity to communicate with the atmosphere through the air inlet, thereby causing the filling structure to expand and apply pressure to the inside of the compression band. This automatic inflatable tourniquet does not require an air pump, is simple to operate, provides good compression, and can be operated with one hand, making it suitable for emergency hemostasis in field or battlefield environments.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an automatic inflatable tourniquet. Background Technology

[0002] A tourniquet is a medical device that blocks blood flow by compressing blood vessels proximal to the heart in the limbs. Commonly used types include rotary tourniquets and pneumatic tourniquets: Pneumatic tourniquets are effective in controlling traumatic bleeding in the limbs and are often used in orthopedic surgery; however, because they require an air pump, they are not suitable for field or battlefield environments. Rotary tourniquets do not require an air pump and are suitable for emergency hemostasis; however, their compression effect is limited, and when used by untrained personnel, the procedure is time-consuming, the hemostatic effect is poor, and improper operation may cause tissue damage. Summary of the Invention

[0003] To address the aforementioned technical problems, this application proposes an automatic inflatable tourniquet that does not require an air pump, is simple to operate, provides good compression, and can be operated with one hand, making it suitable for emergency hemostasis in field or battlefield environments.

[0004] The automatic inflatable tourniquet according to an embodiment of this application includes: A compression band defines a receiving cavity, the receiving cavity being provided with an air inlet, the air inlet being located on the outside of the compression band; A cover plate structure is provided over the air inlet; A sealing plate is slidably mounted on the cover plate structure, and the sealing plate is equipped with a control valve that can close the air inlet. A drive structure is installed on the cover plate structure and connected to the sealing plate; A sensing structure is installed inside the compression belt, and the sensing structure is electrically connected to the driving structure; A filling structure configured to be compressed and filled within the receiving cavity; A locking strap, connected to the compression strap, is used to tighten the compression strap; The controller is electrically connected to the sensing structure and the driving structure; the controller acquires the sensing signal of the sensing structure and controls the driving structure to drive the sealing plate to slide, so that the control valve is misaligned with the air inlet, the receiving cavity is connected to the atmosphere through the air inlet, and then the filling structure expands to apply pressure to the inside of the compression band.

[0005] The automatic inflatable tourniquet according to the embodiments of this application has at least the following beneficial effects: Once the locking strap tightens to the set pressure, the sensing structure sends a signal to automatically activate the drive structure to open the air inlet. This causes the filling structure to automatically expand and compress to stop the bleeding. The operator only needs to operate the locking strap at one locking position without performing any other actions. The operation is simple and convenient. Operators do not need professional training to use it accurately and achieve good hemostasis. Because the action is simple, there is no need to use an air pump. It can be operated with one hand and is suitable for rapid hemostasis in complex environments such as the field or battlefield, significantly improving the survival rate of injured personnel.

[0006] In some embodiments of this application, the sealing plate is provided with a first air hole and a second air hole, the control valve is installed in the first air hole to control the opening and closing of the first air hole, and a filter screen is installed in the second air hole. The sealing plate has a first position and a second position, and the driving structure drives the sealing plate to slide so as to switch the sealing plate from the first position to the second position; When the sealing plate is in the first position, the first air hole is aligned with the air inlet; when the sealing plate is in the second position, the second air hole is aligned with the air inlet.

[0007] In some embodiments of this application, the cover plate structure has a central hole that penetrates the cover plate structure, the wall of the first air hole extends upward and passes through the central hole, and the control valve is installed at the end of the first air hole; the central hole limits the travel end point of the sealing plate.

[0008] In some embodiments of this application, the receiving cavity is further provided with an exhaust port, and the sealing plate is equipped with a sealing structure; The sealing plate in the first position has its sealing structure aligned with the exhaust port; the sealing plate in the second position has its first vent aligned with the exhaust port.

[0009] In some embodiments of this application, the cover plate structure is provided with a receiving groove, and the air intake mask is disposed in the receiving groove; the side wall of the receiving groove is provided with a through hole penetrating the side wall.

[0010] In some embodiments of this application, the bottom of the receiving groove is provided with a sliding groove, and the sealing plate is slidably installed in the sliding groove; The drive structure includes a drive component and a winding rod. The winding rod is rotatably mounted on the cover plate structure about its own axis. The drive component drives the winding rod to rotate about its own axis. The winding rod is connected to the sealing plate through a first connecting rope.

[0011] In some embodiments of this application, the air inlet is fitted with a sealing plate to close the air inlet, and the sealing plate is connected to the winding rod via a second connecting rope.

[0012] In some embodiments of this application, the filling structure includes a first filling layer and a second filling layer, and the inner side of the compression band is provided with a receiving portion. The second filling layer and the sensing structure are both installed in the receiving portion, and the second filling layer is disposed between the sensing structure and the first filling layer. The expansion coefficient of the second filling layer is less than that of the first filling layer, and the cover plate structure is configured correspondingly to the second filling layer.

[0013] In some embodiments of this application, the cover plate structure is equipped with a display and a timing switch. The timing switch is installed on the sliding path of the sealing plate. When the sealing plate switches from a first position to a second position, the timing switch is turned on so as to display the timing on the display. The display is mounted on the side of the cover structure facing away from the sealing plate.

[0014] In some embodiments of this application, the locking band and the compression band are connected by a quick-release structure, and the locking band is equipped with a tightening knob for tightening the locking band.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a front view of the usage state of an embodiment of this application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Axial view of the middle cover plate structure; Figure 4 for Figure 1 A schematic diagram of the internal structure of the middle cover plate; Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0017] Icon labels: Compression belt 100, receiving cavity 110, air inlet 111, exhaust port 112, sealing plate 120, second connecting rope 121, receiving part 130, sensing structure 131; Cover structure 200, center hole 210, receiving groove 220, through hole 221, slide 230, display 240, timing switch 241; Sealing plate 300, first air hole 310, control valve 311, second air hole 320, filter screen 321, sealing structure 330; Drive structure 400, drive component 410, winding rod 420, first connecting rope 430; Filling structure 500, first filling layer 510, second filling layer 520; Locking band 600, tightening knob 610. Detailed Implementation

[0018] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0019] In the description of this application, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0020] In the description of this application, "multiple" refers to two or more. If "first" or "second" is used, it is only for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0021] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. The embodiments of this application may omit unnecessary detailed descriptions. For example, detailed descriptions of well-known matters and repeated descriptions of actually identical structures may be omitted. This is to avoid making the following description unnecessarily lengthy and to facilitate understanding by those skilled in the art.

[0023] In this application, the technical features described in an open-ended manner include both closed technical solutions consisting of the listed features and open technical solutions that include the listed features.

[0024] Reference Figures 1 to 5 This application discloses an automatic inflatable tourniquet, whose core design goal is to achieve simplified operation and efficient hemostasis, especially suitable for rapid emergency treatment in complex environments. The tourniquet is mainly composed of components such as a compression band 100, a cover plate structure 200, a sealing plate 300, a drive structure 400, a sensing structure 131, a filling structure 500, and a locking band 600.

[0025] The compression belt 100 serves as the main component, and its interior defines a receiving cavity 110 for accommodating the filling structure 500. The receiving cavity 110 has an air inlet 111, which is located on the outside of the compression belt 100 to provide a channel for gas to enter.

[0026] The cover structure 200 is installed above the air inlet 111, which not only protects the air inlet 111, but also provides a mounting base for other components.

[0027] The sealing plate 300 is slidably mounted on the cover plate structure 200, and a control valve 311 that can close the air inlet 111 is mounted on it; by sliding the sealing plate 300, the relative position of the control valve 311 and the air inlet 111 can be adjusted.

[0028] The drive structure 400 is also installed on the cover structure 200 and is directly connected to the sealing plate 300, undertaking the function of driving the sealing plate 300 to slide.

[0029] The sensing structure 131 is installed inside the compression band 100 and is in direct contact with the human body to sense the pressure applied by the compression band 100 to the human body. This structure is electrically connected to the drive structure 400, forming a key link between pressure feedback and automatic control. The tourniquet of this application is also equipped with a controller and a battery. The battery powers the controller, drive structure 400, sensing structure 131, and other modules. The sensing structure 131 is electrically connected to the drive structure 400 through the controller; that is, after the pressure signal is fed back to the controller, the controller outputs a drive signal to the drive structure 400 to execute the drive action. In this embodiment, the sensing structure 131 is a pressure sensor.

[0030] The filling structure 500 is filled into the receiving cavity 110 in a compressed state. After the outside gas enters, the filling structure 500 expands to exert a compressive effect.

[0031] The locking band 600 is connected to the compression band 100 and is the direct operating component for the operator to manually tighten the compression band 100.

[0032] The working principle of the automatic inflatable tourniquet in this embodiment is as follows: When the locking band 600 tightens the compression band 100 to the set pressure threshold, the controller obtains the pressure signal of the sensing structure 131, and then controls the driving structure 400 to drive the sealing plate 300 to slide, so that the control valve 311 and the air inlet 111 are misaligned; at this time, the receiving cavity 110 is connected to the atmosphere through the air inlet 111, and the outside gas enters the receiving cavity 110, and the filling structure 500 expands accordingly, thereby applying uniform and continuous pressure to the inside of the compression band 100 to achieve automatic hemostasis.

[0033] The operator only needs to tighten the compression band 100 to the preset locking position using the locking band 600. When the pressure reaches the preset value, the sensing structure 131 automatically sends a signal, triggering the drive structure 400 to open the air inlet 111. The filling structure 500 then automatically expands and applies pressure to stop the bleeding. Throughout the process, the operator does not need to perform any additional actions; the operation is simple and convenient. This demonstrates that even untrained personnel can accurately and quickly use the tourniquet and achieve good hemostasis. Furthermore, due to the single operation and the absence of the need for additional air pumps or other equipment, this tourniquet can be operated with one hand, making it ideal for complex and emergency environments such as field exploration and battlefield first aid, significantly improving the efficiency of on-site treatment and the survival rate of injured personnel.

[0034] In some embodiments of this application, reference is made to Figure 3 , Figure 4 As shown, the sealing plate 300 is provided with a first air hole 310 and a second air hole 320; the control valve 311 is installed in the first air hole 310 for precise control of the opening and closing of the first air hole 310; the second air hole 320 is equipped with a filter screen 321 to filter impurities in the air entering the receiving cavity 110, ensuring the cleanliness and service life of the filling structure 500.

[0035] The sealing plate 300 is designed with two working states: a first position and a second position. The driving structure 400 switches between the first and second positions by driving the sealing plate 300 to slide. When the sealing plate 300 is in the first position, the first vent 310 is aligned with the air inlet 111, and the control valve 311 is closed to prevent gas from entering. When the sealing plate 300 switches to the second position, the second vent 320 is aligned with the air inlet 111, and the gas filtered by the filter screen 321 can smoothly enter the receiving cavity 110 through the second vent 320 and the air inlet 111, providing a gas source for the expansion of the filling structure 500.

[0036] In some embodiments of this application, to achieve a more precise and human-fitting compression effect, reference is made to... Figure 1As shown, the filling structure 500 adopts a layered design, specifically including a first filling layer 510 and a second filling layer 520. A dedicated receiving portion 130 is provided on the inner side of the compression belt 100. Both the second filling layer 520 and the sensing structure 131 are installed within this receiving portion 130, and the second filling layer 520 is disposed between the sensing structure 131 and the first filling layer 510. The coefficient of expansion of the second filling layer 520 is smaller than that of the first filling layer 510.

[0037] Specifically, both the first filling layer 510 and the second filling layer 520 are preferably made of materials such as high-resilience sponge. Such materials not only possess excellent resilience, ensuring shape retention and pressure continuity after expansion, but also have high indentation hardness to guarantee compressive force. The expansion coefficient of the second filling layer 520 mentioned here is smaller than that of the first filling layer 510; specifically, the resilience of the second filling layer 520 is slightly lower than that of the first filling layer 510, while its indentation hardness is greater than that of the first filling layer 510. The advantage of this design is that when the filling structure 500 expands, the harder second filling layer 520 can first contact the injured area and apply effective pressure, while the first filling layer 510 provides subsequent elastic support and pressure buffering, thereby ensuring that the compression band 100 generates sufficient and appropriate compressive force on the hemostatic position.

[0038] Furthermore, the receiving portion 130 and the second filling layer 520 are designed to protrude slightly from the inner surface of the compression band 100. Considering that the location of human compression hemostasis is usually the torso, and the human torso is not a regular cylinder, this protruding design allows the compression band 100 to better conform to the contour of the human torso after tightening and expanding, especially at joints or curved surfaces, thereby achieving a more precise and effective compression hemostasis effect.

[0039] In some embodiments of this application, to facilitate monitoring of hemostasis time and prevent irreversible damage such as ischemic necrosis of limb tissue due to prolonged compression, a display 240 and a timing switch 241 are also installed on the cover structure 200. (See reference...) Figure 4 , Figure 5 As shown, the timing switch 241 is installed on the sliding path of the sealing plate 300. When the sealing plate 300 switches from the first position to the second position (i.e., the air inlet 111 starts to intake air and the filling structure 500 starts to expand), the sealing plate 300 will touch the timing switch 241 and turn it on. At this time, the display 240 will automatically start timing and display the duration of compression hemostasis.

[0040] Reference Figure 3As shown, the display 240 is mounted on the side of the cover structure 200 facing away from the sealing plate 300 (i.e., the side facing the operator), allowing the operator to view it at any time. This design enables the operator to intuitively understand the duration of compression, so that the compressed position can be relaxed at the appropriate time according to medical guidelines to avoid complications. The linkage design between the timing switch 241 and the sliding path of the sealing plate 300 ensures that the timing is automatically started the moment air enters from the receiving cavity 110, without the need for additional manual operation. This simplifies the process and ensures the accuracy and timeliness of the timing.

[0041] In some embodiments of this application, reference is made to Figure 3 , Figure 4 As shown, to effectively limit the sliding stroke of the sealing plate 300 and optimize the installation of the control valve 311, the cover plate structure 200 is provided with a central hole 210 that penetrates its thickness. The wall of the first vent 310 on the sealing plate 300 extends upward and passes through the central hole 210, and the control valve 311 is installed at the end of the first vent 310 that extends out of the central hole 210. The central hole 210 serves to limit the sliding stroke of the sealing plate 300. Specifically, the central hole 210 is designed as a strip-shaped hole. When the sealing plate 300 is in the first position, the wall of the first vent 310 extending upward fits against the first end wall of the central hole 210 along its length; when the sealing plate 300 slides to the second position, the wall of the first vent 310 fits against the second end wall of the central hole 210 along its length. This structure not only achieves precise control of the sliding range of the sealing plate 300, but also provides space for the installation and operation of the control valve 311.

[0042] In some embodiments of this application, reference is made to Figure 1 , Figure 4 As shown, to achieve active adjustment of the pressure and venting function, the receiving cavity 110 is also provided with an exhaust port 112, and a sealing structure 330 that cooperates with the exhaust port 112 is installed on the sealing plate 300. When the sealing plate 300 is in the first position, the sealing structure 330 is exactly aligned with the exhaust port 112, thereby sealing the exhaust port 112 and preventing gas leakage; when the sealing plate is switched to the second position, the first vent 310 is aligned with the exhaust port 112, and the opening and closing of the exhaust port 112 can be controlled by operating the control valve 311 on the first vent 310.

[0043] The control valve 311 is preferably operated manually. After the operator confirms via the display 240 that the compression time has reached the set value, they can manually open the control valve 311, allowing some of the gas in the receiving cavity 110 to be discharged through the first vent 310 and the exhaust port 112, thereby appropriately relieving the compressed area. The set time can be set to 1 hour or 30 minutes, with the specific duration determined according to the actual situation. The sealing structure 330 is preferably a structure with good elasticity and sealing performance, such as a sealing ring.

[0044] It should be noted that although loosening the locking band 600 can also relieve pressure on the compressed area, the control valve 311 is smaller and has higher adjustment precision, enabling finer pressure adjustments. Furthermore, as mentioned above, the filling structure 500 is preferably sponge, and the resilience of the sponge may be affected by factors such as ambient temperature and humidity, resulting in slight differences in the pressure effect of the filling structure 500 on the human body at different times of the day. By making minor adjustments through the control valve 311, these differences can be compensated for in a timely manner, improving the comfort of the compressed area and preventing excessively tight or loose pressure from affecting hemostasis or causing discomfort.

[0045] It should be noted that one-way valves are preferably installed at both the air inlet 111 and the exhaust port 112. The one-way valve at the air inlet 111 ensures that gas can only enter the receiving cavity 110 in one direction, preventing backflow; the one-way valve at the exhaust port 112 ensures that gas is only discharged through the control valve 311 when needed.

[0046] In some embodiments of this application, to further protect the air intake 111 and increase the air intake speed, refer to Figure 4 As shown, the cover plate structure 200 is provided with a receiving groove 220, and the air inlet 111 is covered within the receiving groove 220. A through hole 221 is also provided on the side wall of the receiving groove 220. The cover plate structure 200 effectively prevents the air inlet 111 from being directly blocked by external debris, ensuring unobstructed air intake. The through hole 221 works in conjunction with the second air hole 320 on the sealing plate 300: when the sealing plate 300 is in the second position, air can not only directly enter the air inlet 111 through the second air hole 320, but also enter the receiving groove 220 through the through hole 221 on the side wall of the receiving groove 220, and then enter the receiving cavity 110 through the second air hole 320 and the air inlet 111. This design significantly increases the air intake area and helps to increase the air intake speed of the air inlet 111, thereby achieving rapid air intake and expansion of the filling structure 500, buying valuable time for emergency hemostasis.

[0047] In some embodiments of this application, reference is made to Figure 4 , Figure 5 As shown, in order to optimize the sliding guidance and driving method of the sealing plate 300, the bottom of the receiving groove 220 is provided with a sliding groove 230, and the sealing plate 300 is slidably installed in the sliding groove 230. The sliding groove 230 provides stable guidance for the sliding of the sealing plate 300.

[0048] Reference Figure 4 , Figure 5As shown, the drive structure 400 includes a drive member 410 and a winding rod 420. The winding rod 420 is rotatably mounted on the cover plate structure 200 about its own axis, and the drive member 410 drives the winding rod 420 to rotate about its own axis. The drive member 410 employs a micro motor or electromagnetic drive device. The winding rod 420 is connected to the sealing plate 300 via a first connecting rope 430. When the drive member 410 drives the winding rod 420 to rotate forward, the winding rod 420 winds up the first connecting rope 430, thereby pulling the sealing plate 300 to slide from a first position to a second position.

[0049] The sealing plate 300 is driven by the winding rod 420 winding the first connecting rope 430. This allows both the cover structure 200 and the sealing plate 300 to be made of a flexible material, giving the entire tourniquet some bending and elastic deformation capabilities. This makes it easier to conform to the curves of different parts of the body, improving usability and ease of storage. Meanwhile, the driving component 410 only needs to drive the winding rod 420 to rotate. Compared to directly driving the sealing plate 300 to slide, this significantly reduces the size and power required by the driving component 410, facilitating the overall miniaturization and lightweight design of the automatic inflatable tourniquet.

[0050] In some embodiments of this application, to prevent the control valve 311 from accidentally opening due to misoperation when the sealing plate 300 is in the first position, causing the air inlet 111 to open and the filling structure 500 to expand prematurely, thereby resulting in tourniquet failure or material waste, a sealing plate 120 is additionally installed at the air inlet 111 to initially close the air inlet 111. (See also...) Figure 1 , Figure 2 As shown, the sealing plate 120 is connected to the winding rod 420 via the second connecting rope 121. When the winding rod 420 performs a winding action under the drive of the drive unit 410, it will simultaneously wind up the first connecting rope 430 and the second connecting rope 121. By winding up the first connecting rope 430, the winding rod 420 pulls the sealing plate 300 from the first position to the second position; at the same time, by winding up the second connecting rope 121, it pulls out the sealing plate 120 that originally blocked the air inlet 111, so that the air inlet channel is fully opened. The setting of the sealing plate 120 forms a double insurance mechanism, which can ensure that when the automatic inflatable tourniquet of this embodiment is not locked (i.e., the sealing plate 300 is not switched to the second position), even if the control valve 311 is opened due to accidental contact, the air inlet 111 can still be reliably closed by the sealing plate 120, and gas cannot enter, thereby effectively improving the safety of tourniquet use and reducing product waste and usage risks caused by misoperation.

[0051] In some embodiments of this application, to facilitate the quick donning and disassembly of the tourniquet and ensure the convenience and reliability of the tightening operation, the locking band 600 is preferably connected to the compression band 100 via a quick-release structure. The specific form of the quick-release structure can be designed according to actual needs, such as buckles, Velcro, snap fasteners, etc. This embodiment does not specifically limit this, but the connection must be secure and the operation convenient. A tightening knob 610 is installed on the locking band 600 for precisely controlling the tightening degree of the locking band 600.

[0052] Specifically, the locking band 600 may include a first locking band and a second locking band, and the tightening knob 610 typically has a ratchet or worm gear-like structure inside. By rotating the tightening knob 610, the first and second locking bands can move relative to each other and tighten, thereby causing the compression band 100 to tighten at the injured area of ​​the body. This design allows the operator to easily and quickly adjust the initial tightening force of the compression band 100 until the set pressure triggered by the sensing structure 131 for automatic inflation is reached.

[0053] Throughout this specification, references to "implementation method," "partial implementation method," "one implementation method," "another method," "specific method," or "partial method" mean that at least one implementation method or embodiment in this application includes the specific features, structures, materials, or characteristics described in that implementation method or embodiment.

[0054] In this application, numerical ranges are involved. Unless otherwise specified, the numerical ranges mentioned above are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Any lower limit can be combined with any upper limit to form a range not explicitly stated; any lower limit can be combined with other lower limits to form a range not explicitly stated, and similarly, any upper limit can be combined with any other upper limit to form a range not explicitly stated. Furthermore, each individually disclosed point or single value can itself serve as a lower or upper limit and be combined with any other point or single value or with other lower or upper limits to form a range not explicitly stated.

[0055] Although illustrative embodiments have been demonstrated and described, those skilled in the art should understand that the above embodiments should not be construed as limiting the present application, and that changes, substitutions and modifications can be made to the embodiments without departing from the spirit, principles and scope of the present application.

Claims

1. An automatic inflatable tourniquet, characterized in that, include: A compression band defines a receiving cavity, the receiving cavity being provided with an air inlet, the air inlet being located on the outside of the compression band; A cover plate structure is provided over the air inlet; A sealing plate is slidably mounted on the cover plate structure, and the sealing plate is equipped with a control valve that can close the air inlet. A drive structure is installed on the cover plate structure and connected to the sealing plate; A sensing structure is installed inside the compression belt, and the sensing structure is electrically connected to the driving structure; A filling structure configured to be compressed and filled within the receiving cavity; A locking strap, connected to the compression strap, is used to tighten the compression strap; The controller is electrically connected to the sensing structure and the driving structure; the controller acquires the sensing signal of the sensing structure and controls the driving structure to drive the sealing plate to slide, so that the control valve is misaligned with the air inlet, the receiving cavity is connected to the atmosphere through the air inlet, and then the filling structure expands to apply pressure to the inside of the compression band.

2. The automatic inflatable tourniquet according to claim 1, characterized in that, The sealing plate is provided with a first air hole and a second air hole. The control valve is installed in the first air hole to control the opening and closing of the first air hole. The second air hole is equipped with a filter screen. The sealing plate has a first position and a second position, and the driving structure drives the sealing plate to slide so as to switch the sealing plate from the first position to the second position; When the sealing plate is in the first position, the first air hole is aligned with the air inlet. When the sealing plate is in the second position, the second air hole is aligned with the air inlet.

3. The automatic inflatable tourniquet according to claim 2, characterized in that, The cover plate structure has a central hole that penetrates the cover plate structure. The wall of the first air hole extends upward and passes through the central hole. The control valve is installed at the end of the first air hole. The central hole limits the travel end point of the sealing plate.

4. The automatic inflatable tourniquet according to claim 2, characterized in that, The receiving cavity is also provided with an exhaust port, and the sealing plate is equipped with a sealing structure; The sealing plate in the first position has its sealing structure aligned with the exhaust port; the sealing plate in the second position has its first vent aligned with the exhaust port.

5. The automatic inflatable tourniquet according to claim 1, characterized in that, The cover plate structure is provided with a receiving groove, and the air intake mask is placed in the receiving groove; the side wall of the receiving groove is provided with a through hole penetrating the side wall.

6. The automatic inflatable tourniquet according to claim 5, characterized in that, The bottom of the receiving groove is provided with a sliding groove, and the sealing plate is slidably installed in the sliding groove; The drive structure includes a drive component and a winding rod. The winding rod is rotatably mounted on the cover plate structure about its own axis. The drive component drives the winding rod to rotate about its own axis. The winding rod is connected to the sealing plate through a first connecting rope.

7. The automatic inflatable tourniquet according to claim 6, characterized in that, The air inlet is equipped with a sealing plate to close the air inlet, and the sealing plate is connected to the winding rod via a second connecting rope.

8. The automatic inflatable tourniquet according to claim 1, characterized in that, The filling structure includes a first filling layer and a second filling layer. The inner side of the compression band is provided with a receiving portion. The second filling layer and the sensing structure are both installed in the receiving portion. The second filling layer is disposed between the sensing structure and the first filling layer. The expansion coefficient of the second filling layer is less than that of the first filling layer, and the cover plate structure is configured correspondingly to the second filling layer.

9. The automatic inflatable tourniquet according to claim 1, characterized in that, The cover plate structure is equipped with a display and a timing switch. The timing switch is installed on the sliding path of the sealing plate. When the sealing plate switches from the first position to the second position, the timing switch is turned on so that the timing is displayed on the display. The display is mounted on the side of the cover structure facing away from the sealing plate.

10. The automatic inflatable tourniquet according to claim 1, characterized in that, The locking band and the compression band are connected by a quick-release structure, and the locking band is equipped with a tightening knob for tightening the locking band.

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