A quick-locking tourniquet

Abstract

This invention relates to a rapid-locking tourniquet, belonging to the field of medical device technology. It includes a bonding substrate with an arc-shaped contact surface and a locking groove; a locking base frame mounted on the back of the bonding substrate; a tension restraint band passing through the locking groove and applying tension through a tension adjustment component; a sustained-release module for adjusting the tension; and a covering band that, together with the tension restraint band, forms a ring-shaped hemostatic space. The sustained-release module includes: a sustained-release airbag assembly for providing air pressure buffering and intelligent sustained release; or a lifting distance assembly for mechanically adjusting the tension height. This invention, through the combination of multiple precision mechanical structures and intelligent electronic control, achieves rapid and precise tourniquet tensioning, intelligent pressure sustained release, real-time physiological parameter monitoring, and multi-dimensional safety assurance, significantly improving hemostatic effect, patient comfort, and clinical operation efficiency, while reducing the risk of tissue damage.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a quick-locking tourniquet. Background Technology

[0002] Tourniquets, as an important medical emergency and clinical instrument, play an irreplaceable role in various fields such as trauma hemostasis, surgery, and emergency resuscitation. Their basic principle is to apply circumferential pressure to the proximal end of the limb to block blood flow and thus control bleeding. From the earliest simple binding to the modern inflatable tourniquet, its design and application have undergone a long development process.

[0003] However, traditional tourniquets, whether manually applied or mechanically tightened, still face numerous challenges in practical use. For example, while manually applying a tourniquet is simple, the pressure applied is often difficult to control precisely. Too loose a tourniquet may fail to stop bleeding effectively, while too tight a tourniquet may cause damage to nerves and muscles in distal limbs, or even serious complications such as ischemia-reperfusion injury. Furthermore, prolonged, single-application pressure may increase the risk of tissue necrosis, requiring medical staff to periodically loosen the tourniquet to relieve pressure. This not only increases the complexity of the procedure but also places higher demands on the experience and judgment of medical personnel.

[0004] While some mechanically tightened tourniquets improve ease of operation to some extent, they generally lack a sophisticated control mechanism for pressure release, making it impossible to achieve a smooth and controllable pressure release. Once the tourniquet needs to be loosened, the pressure is often released completely in an instant, which may also cause shock to the patient.

[0005] How to solve the above-mentioned technical problems is the challenge facing this invention. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a rationally designed, safe, and reliable quick-locking tourniquet. Through the combination of multiple precision mechanical structures and intelligent electronic control, it achieves rapid and precise tourniquet tensioning, intelligent pressure release, real-time physiological parameter monitoring, and multi-dimensional safety assurance. This significantly improves hemostasis, patient comfort, and clinical operation efficiency, while reducing the risk of tissue damage.

[0007] The technical solution adopted by the present invention to solve its technical problem is: a quick-locking tourniquet, comprising: a bonding substrate, the outer surface of which is provided with an arc-shaped contact surface that fits the patient's skin, and the bonding arc plate is symmetrically provided with locking grooves;

[0008] A locking base frame is installed on the side of the bonding substrate away from the bonding arc surface;

[0009] The tensioning restraint band has its two ends respectively inserted into the two locking slots of the bonding substrate. It is installed on the locking base frame by a tension adjustment assembly, which serves as an adjustment component for applying and adjusting the tension of the tensioning restraint band.

[0010] The slow-release module works in conjunction with the tension adjustment component and is used to adjust the tension force applied by the tension adjustment component to the tension constraint band.

[0011] The covering band has a width greater than that of the tension restraint band, and its two ends are fixedly connected to the two ends of the tension restraint band by connecting units; wherein the covering band and the tension restraint band together form an annular hemostatic space for accommodating the patient's limb.

[0012] Two preferred structural designs for the tension adjustment components are provided, as follows:

[0013] In the first structure, the tension adjustment component includes:

[0014] Adjustable base frame, installed on the locking base frame;

[0015] The adjusting drum has two ends that are rotatably connected to the adjusting base frame, and it is provided with an adjusting groove.

[0016] The adjusting component has its output end passing through the adjusting base frame and fixedly connected to one end of the adjusting cylinder;

[0017] And a self-locking unit is provided at the other end of the adjusting drum to prevent the adjusting drum from accidentally loosening after adjustment;

[0018] The tensioning constraint band is provided at one time, and the tensioning constraint band passes through the regulating groove and is wrapped around the regulating drum.

[0019] Furthermore, the self-locking unit includes:

[0020] A ratchet is fixed to one end of the adjusting cylinder and is provided with ring teeth;

[0021] A pawl is pivotally connected to the adjusting base and engages with the teeth of the ratchet to prevent the adjusting drum from rotating in the opposite direction;

[0022] A pawl return spring is used to provide force to keep the pawl engaged with the ratchet.

[0023] And a release element, which is linked to the pawl, such that when the release mechanism is operated, the pawl disengages from the ratchet, thereby allowing the adjusting drum to rotate.

[0024] In the second structure, the tension adjustment component includes:

[0025] The tensioning base frame is installed on the locking base frame;

[0026] The first roller has both ends rotatably connected to the tensioning base frame, and a first gear is provided at one end of it;

[0027] The second roller has both ends rotatably connected to the tensioning frame, and one end of it is provided with a second gear that meshes with the first gear.

[0028] A reversing adjustment unit is mounted on the locking base frame and is used to reverse the rotation direction of the first roller and the second roller and to rotate them synchronously.

[0029] The tension control has its output end passing through the tension base frame and fixedly connected to the other end of the first or second roller;

[0030] And a locking unit, which is provided on the tensioning base frame and is used to prevent the first roll and the second roll from accidentally loosening after adjustment;

[0031] The tensioning constraint band is provided in two parts, and the two tensioning constraint bands respectively pass through the locking groove, and the two tensioning constraint bands are respectively fixedly connected to the first roller and the second roller.

[0032] Furthermore, the inversion adjustment unit includes:

[0033] The first bevel gear is disposed at one end of the first roller;

[0034] The second bevel gear is disposed at one end of the second roller and has the same tooth profile as the first bevel gear;

[0035] And an intermediate bevel gear, pivotally connected to the locking base frame, and simultaneously meshing with the first bevel gear and the second bevel gear to achieve the reverse synchronous rotation of the first roller and the second roller.

[0036] More preferably, the sustained-release module includes a sustained-release airbag assembly, which is mounted on the arc-shaped contact surface side of the substrate and located below the action path of the tension restraint band, for providing air pressure buffering before the tension force is transmitted to the patient's skin;

[0037] The sustained-release airbag assembly includes:

[0038] The airbag unit is mounted on the bonding substrate;

[0039] A pneumatic adjustment unit is mounted on the locking base and is connected to the airbag unit via an adjustment hose;

[0040] The monitoring unit, mounted on the bonding substrate, is used to monitor the patient's condition and the pressure of the balloon unit;

[0041] It also includes an intermittent control unit, which is electrically connected to the pneumatic adjustment unit and uses built-in logic preset in the intermittent control unit to control the airbag.

[0042] Furthermore, the release module includes a lifting gap component, which is disposed between the locking base and the tension adjustment component to control the height position of the tension adjustment component relative to the bonding substrate, thereby indirectly adjusting the pressure applied to the limb by the tension restraint strap.

[0043] The lifting distance component includes:

[0044] Two lifting base slots are vertically opened on both sides of the locking base frame, and the tension adjustment assembly slides with the locking base frame through the lifting base slots;

[0045] A spacing support unit is installed in the lifting base groove and connected to the tension adjustment assembly;

[0046] And a spacing control unit, which is installed on the locking base and is linked with the spacing support unit to change the vertical spacing between the tension adjustment component and the bonding substrate, thereby indirectly adjusting the tightness of the tension constraint band.

[0047] More preferably, the connection unit includes:

[0048] The first hook surface or the first ring surface is set at both ends of the tensioning restraint band;

[0049] The second annular surface or the second hook surface covers a large area of ​​the back of the covering tape and works in conjunction with the first hook surface or the first annular surface to bond over a large area.

[0050] Two tightening straps are respectively positioned at both ends of the tensioning restraint strap;

[0051] And two sets of locking rings, symmetrically arranged on both sides of the covering tape, and respectively connected and engaged with two tightening straps.

[0052] Preferably, two sets of stable rotating frames that cooperate with the locking groove are symmetrically provided at the bottom end of the locking base frame. Each stable rotating frame is provided with a stable rotating cylinder that cooperates with the tensioning constraint band. Each set of stable rotating frames includes two stable rotating frames symmetrically located on both sides of the locking groove.

[0053] Preferably, the locking base is provided with a protective buckle cover that cooperates with the locking base, and the protective buckle cover is provided with a control panel slot that cooperates with the slow-release module.

[0054] This invention significantly improves the pressure application efficiency of tourniquets through an innovative tension adjustment component. For example, in the first structure, the adjusting drum, in conjunction with a reduction gear set, allows medical personnel to achieve precise tightening of the tension restraint band with less operating force, elevating the precision of tension adjustment to a new level. Once the preset pressure is reached, the self-locking unit automatically locks immediately to prevent accidental loosening, ensuring the immediacy and durability of the hemostatic effect. In the second structure, the coordinated operation of the double rollers and the reverse adjustment unit ensures that the two tension restraint bands tighten synchronously and evenly, avoiding the skewing or localized stress concentration that may occur with traditional tourniquets, thereby improving the stability and reliability of the overall hemostatic effect.

[0055] This invention utilizes a sustained-release airbag assembly positioned between the adhesive substrate and the limb. Its multiple independent air chambers and miniature pressure-limiting valves enable flexible pressure buffering and precise local adjustment, significantly reducing the risk of tissue damage caused by traditional rigid compression. More importantly, the pneumatic adjustment unit, monitoring unit, and intermittent control unit work together to monitor hemostatic pressure and the patient's limb physiological state in real time, and intelligently perform intermittent or gradient pressure release based on preset logic or real-time feedback. This not only effectively prolongs safe hemostasis time but also maximizes the protection of nerve and muscle tissue, avoiding ischemia-reperfusion injury.

[0056] The lifting distance component in this invention serves as another pressure regulation mechanism. By changing the vertical height of the tension adjustment component, it indirectly regulates the pressure, providing the system with fine mechanical adjustment capabilities. It complements or links with the airbag component, further enhancing the flexibility and safety of pressure management.

[0057] The curved contact surface of the substrate and the wider covering band design in this invention effectively disperse the linear pressure of the tension restraint band into planar pressure, greatly improving patient comfort. The pressure buffering effect provided by the sustained-release airbag assembly fundamentally improves the problem of rigid compression in traditional tourniquets. Furthermore, the dual protection mechanism of the miniature pressure-limiting valve and the safety relief valve effectively prevents local or overall overpressure of the airbag. Real-time monitoring of physiological parameters by the monitoring unit provides an early warning function, enabling medical personnel to promptly detect and intervene in potential tissue ischemia, pushing the safety of the hemostasis process to a new level.

[0058] The protective cap in this invention not only protects the internal precision components, but its control panel slot also provides an integrated operating interface for the sustained-release module. The anti-slip texture of the adjustment knob and the quick-connect unit between the tightening strap and the locking ring make the installation, tensioning, adjustment, and release of the tourniquet more efficient and convenient, even in emergency situations. Furthermore, the design of the smooth rotating frame and rotating cylinder effectively reduces friction, ensuring smooth operation. The two tension adjustment components and two sustained-release modules provided by this invention demonstrate the modularity and versatility of the design, enabling flexible adaptation to different clinical needs and application scenarios. Attached Figure Description

[0059] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0060] Figure 2 This is a three-dimensional structural diagram of the present invention with the protective buckle cover removed;

[0061] Figure 3 This is an exploded view of the present invention with the protective buckle cover removed;

[0062] Figure 4 This is a first-view schematic diagram of the bonding substrate, locking frame, and tension adjustment assembly of the present invention;

[0063] Figure 5 This is a second-view schematic diagram of the bonding substrate, locking frame, and tension adjustment assembly of the present invention.

[0064] Figure 6 This is a schematic diagram showing the assembly of the tension adjustment component, tension restraint belt, and covering belt body of the present invention.

[0065] Figure 7 This is a schematic diagram of the first structure of the tension adjustment component of the present invention;

[0066] Figure 8 This is a schematic diagram of a second structure of the tension adjustment component of the present invention.

[0067] The reference numerals in the attached drawings are as follows: 100, bonding substrate; 110, arc-shaped contact surface; 120, locking groove; 130, smooth rotating drum; 140, protective buckle cover; 200, locking base frame; 300, tensioning restraint band; 400, tension adjustment assembly; 411, adjusting base frame; 412, adjusting rotating drum; 413, regulating through groove; 414, adjusting rotating part; 415, self-locking unit; 416, ratchet; 417, release part; 421, tensioning base frame; 422, first roller; 423, first gear; 424, second roller; 425, second gear. 426. Reverse adjustment unit; 427. Tension control; 428. Locking unit; 500. Covering belt body; 600. Connecting unit; 610. First hook surface; 620. First annular surface; 630. Second annular surface; 640. Tightening strap; 650. Locking ring; 640. Second hook surface; 700. Sustained release module; 800. Sustained release airbag assembly; 810. Airbag unit; 820. Pneumatic adjustment unit; 900. Intermittent control unit; 900. Lifting gap assembly; 910. Lifting base groove; 920. Gap support unit; 930. Gap control unit. Detailed Implementation

[0068] See Figures 1 to 8 As shown, a quick-locking tourniquet includes: a conforming base plate 100, the outer surface of which is provided with an arc-shaped contact surface 110 that conforms to the patient's skin. The arc-shaped contact surface 110 is designed to better conform to the physiological curvature of the human limb, improve wearing comfort and ensure uniform pressure transmission, and avoid excessive local pressure that could cause tissue damage. The conforming arc plate is symmetrically provided with locking grooves 120, which are used to guide and fix the passage path of the tension restraint band 300, ensuring that it can stably apply pressure to the limb when tightened.

[0069] The locking base 200 is installed on the side of the bonding substrate 100 away from the bonding arc surface; the locking base 200 is the main support structure of the entire tension adjustment and release system, bearing the various functional components and fixing them firmly to the patient;

[0070] The tension restraint band 300 has its two ends respectively inserted into the two locking grooves 120 of the bonding substrate 100. During the tensioning process, the tension restraint band 300 can smoothly and effectively wrap around the limb through the guiding effect of the locking grooves 120, and as the main force-bearing component, it transmits the force applied by the tension adjustment component 400 to the covering band 500. The covering band 500 is installed on the locking base 200 through the tension adjustment component 400, and the tension adjustment component 400 serves as an adjustment component for applying and adjusting the tension force of the tension restraint band 300.

[0071] The sustained-release module 700, in conjunction with the tension adjustment component 400, has the core function of achieving safe and controllable release of hemostatic pressure, avoiding secondary injury to the patient due to sudden pressure drop, while allowing intermittent or gradient pressure management to prolong hemostasis time and reduce the risk of complications. It is also used to adjust the tension force applied by the tension adjustment component 400 to the tension restraint band 300.

[0072] The covering band 500 is wider than the tension restraint band 300. The covering band 500 serves as the main pressure-bearing surface, aiming to disperse the linear pressure of the tension restraint band 300 into planar pressure, thereby reducing the patient's local pressure and distributing the hemostatic pressure more evenly, improving the hemostatic effect and comfort. Its two ends are fixedly connected to the two ends of the tension restraint band 300 through connecting units 600. The covering band 500 and the tension restraint band 300 together form an annular hemostatic space for accommodating the patient's limb.

[0073] Preferably, two sets of smooth rotating frames that cooperate with the locking groove 120 are symmetrically arranged at the bottom end of the locking base frame 200. Each smooth rotating frame is equipped with a smooth rotating cylinder 130 that cooperates with the tensioning restraint band 300. Each set of smooth rotating frames includes two smooth rotating frames symmetrically located on both sides of the locking groove 120. The arrangement of these smooth rotating frames and rotating cylinders effectively reduces friction between the tensioning restraint band 300 and the base plate and the edge of the locking groove 120 when the tensioning restraint band 300 passes through it, ensuring smooth tensioning and extending the service life of the tensioning restraint band 300.

[0074] Preferably, the locking base 200 is provided with a protective cover 140 that mates with the locking base, and the protective cover 140 is provided with a control panel slot that mates with the sustained-release module 700. The protective cover 140 effectively protects the internal precision mechanical parts and electronic components from external impacts, dust, and liquid corrosion, improving the durability and reliability of the tourniquet; while the control panel slot provides integrated space for the user interface of the sustained-release module 700, facilitating operator observation and control.

[0075] Two preferred structural designs for the tension adjustment assembly 400 are provided, as follows:

[0076] In the first structure, the tension adjustment assembly 400 includes:

[0077] The adjusting base frame 411 is installed on the locking base frame 200 and serves as a support frame for the adjusting drum 412 and the self-locking unit 415 to ensure their stable operation.

[0078] The adjusting drum 412 is rotatably connected to the adjusting base frame 411 at both ends. The adjusting drum 412 is the core component for achieving tension. By winding the tension restraint band 300, its linear stretching is converted into rotational motion, thereby applying tension force to the tourniquet. The adjusting drum 412 is provided with an adjustment groove 413, which is used to guide the tension restraint band 300 into and fix it on the adjusting drum 412 to prevent it from slipping off during use.

[0079] The adjusting component 414 has its output end passing through the adjusting base frame 411 and fixedly connected to one end of the adjusting drum 412. The adjusting component 414 is the interface for direct operation by the user. By rotating this component, the adjusting drum 412 can be driven to rotate, thereby tightening or loosening the tension constraint belt 300.

[0080] And a self-locking unit 415 is provided at the other end of the adjusting cylinder 412. The self-locking unit 415 is the key to maintaining the tourniquet in a stable tension state. Its working principle is that once the tension reaches the preset value, or the user stops operating, the unit automatically locks the adjusting cylinder 412 to prevent it from loosening in the opposite direction, thus ensuring the continuity of the hemostatic effect; and it is also used to prevent the adjusting cylinder 412 from accidentally loosening after adjustment.

[0081] The tensioning constraint band 300 is provided at one time, and the tensioning constraint band 300 passes through the regulating groove 413 and is wrapped around the regulating drum 412.

[0082] Furthermore, the self-locking unit 415 includes:

[0083] A ratchet 416 is fixed to one end of the adjusting cylinder 412 and is provided with annular teeth;

[0084] A pawl is pivotally connected to the adjusting base 411 and meshes with the teeth of the ratchet 416 to prevent the adjusting drum 412 from rotating in the opposite direction;

[0085] A pawl return spring is used to provide force to keep the pawl engaged with the ratchet 416;

[0086] And a release element 417, which is linked to the pawl, when the release mechanism is operated, the pawl disengages from the ratchet 416, thereby allowing the adjusting drum 412 to rotate.

[0087] Specifically, the release element 417 can be configured as a release lever or a button structure.

[0088] Furthermore, this self-locking structure can also be consistent with the structure of the locking unit 428 in the second structure described below.

[0089] Furthermore, the tensioning component is configured as an adjustment knob, its outer surface is provided with anti-slip texture, and its inner wall is fixedly connected to one end of the adjustment cylinder 412.

[0090] Furthermore, the tensioning mechanism also includes a reduction gear set disposed between the adjusting knob and the adjusting drum 412. This gear set adjusts the speed ratio between the rotation of the adjusting knob and the rotation of the adjusting drum 412, thereby improving the accuracy of tension adjustment. The reduction gear set can convert a large rotation angle by the operator into a small rotation angle by the adjusting drum 412, making the tension adjustment more precise and controllable, and preventing over-tensioning.

[0091] It is worth noting that the structure of the adjusting component 414 corresponds to the structure of the tensioning control 427 described below, and the two can be identical in structure.

[0092] In the second structure, the tension adjustment assembly 400 includes:

[0093] The tensioning base frame 421, mounted on the locking base frame 200, provides a stable mounting platform for the first winding roller 422, the second winding roller 424, and the reversing adjustment unit 426.

[0094] The first roller 422 is rotatably connected to the tensioning base frame 421 at both ends. The roller is used to wind and tighten one of the tensioning constraint belts 300. It is one of the execution components for achieving bidirectional synchronous tensioning, and a first gear 423 is provided at one end of it.

[0095] The second roller 424 is rotatably connected to the tensioning base frame 421 at both ends. This roller works in cooperation with the first roller 422 to wind and tighten another tensioning constraint belt 300, together ensuring uniform tension at both ends of the covering belt 500; and a second gear 425 is provided at one end of it to mesh with the first gear 423.

[0096] The reversing adjustment unit 426 is mounted on the locking base 200. This unit is key to achieving synchronous and reverse tightening of the two tensioning restraint bands 300. Its working principle is to decompose and transmit the single operating force to the two rollers, ensuring that they rotate at the same speed but in opposite directions, so that the tourniquet remains balanced when tightening, avoiding skewing and local stress concentration; and it is used to reverse the rotation direction of the first roller 422 and the second roller 424 and rotate them synchronously.

[0097] The tension control 427 has its output end passing through the tension base 421 and fixedly connected to the other end of the first roller 422 or the second roller 424. As an interface for user operation, by operating the tension control 427, the first roller 422 and the second roller 424 can be driven synchronously to achieve fast and balanced tensioning.

[0098] And a locking unit 428 is disposed on the tensioning base 421. The locking unit 428 is designed to precisely fix the position of the first roller 422 and the second roller 424 to ensure that the tension can be stably maintained after adjustment, prevent accidental loosening, thereby maintaining an effective hemostatic effect; and to prevent the first roller 422 and the second roller 424 from accidentally loosening after adjustment.

[0099] Two tensioning constraint bands 300 are provided, and the two tensioning constraint bands 300 pass through the locking groove 120 respectively, and the two tensioning constraint bands 300 are fixedly connected to the first roller 422 and the second roller 424 respectively.

[0100] Based on this second structure, two preferred structural designs for the inverted adjustment unit 426 are provided, as follows:

[0101] Firstly, the inverted adjustment unit 426 includes:

[0102] The first bevel gear is disposed at one end of the first roller 422;

[0103] The second bevel gear is located at one end of the second roller 424 and has the same tooth profile as the first bevel gear.

[0104] And an intermediate bevel gear, which is pivotally connected to the locking base 200 and simultaneously meshes with the first bevel gear and the second bevel gear to achieve the reverse synchronous rotation of the first roller 422 and the second roller 424.

[0105] When the first roller 422 or the second roller 424 rotates via the tension control 427, the intermediate bevel gear drives the other roller to rotate in the opposite direction, thereby achieving synchronous rotation of the two rollers in opposite directions. This mechanism can effectively ensure the synchronicity of the two rollers and reduce uneven tension caused by asynchrony.

[0106] Secondly, the inversion adjustment unit 426 includes:

[0107] The first pulley is fixed to one end of the first roller 422;

[0108] The second pulley is fixed to one end of the second roller 424, and its diameter is the same as that of the first pulley;

[0109] And a cross drive belt, which winds and connects the first pulley and the second pulley in a cross manner to achieve the reverse synchronous rotation of the first roller 422 and the second roller 424.

[0110] Specifically, pulleys are respectively installed on the first roller 422 and the second roller 424. A drive belt is wound around the two pulleys in a crisscross pattern. When one roller rotates, the other roller will rotate in the opposite direction due to the pull of the drive belt. This structure provides smooth transmission and low noise, but it requires a certain level of tension in the drive belt.

[0111] The locking unit 428 includes:

[0112] The brake pad is movably mounted on the tensioning base 421 and can selectively contact the side of the first roller 422 and / or the second roller 424.

[0113] A resilient reset member is used to separate the brake pad from the roller in a non-operating state; and

[0114] And an operating lever or pressing device for driving the brake pad to press the first roller 422 and / or the second roller 424, thereby preventing their rotation by friction.

[0115] Specifically, one or more brake pads are mounted on the tensioning base 421 and can be pressed against the sides or shaft ends of the first roller 422 and / or the second roller 424 by an operating lever or pressing device. The brake pads are typically made of a high-friction material to ensure sufficient locking force. To release the lock, simply release the operating lever.

[0116] More preferably, the sustained-release module 700 includes a sustained-release airbag assembly 800, which is mounted on the arcuate contact surface 110 side of the substrate 100 and located below the action path of the tension restraint band 300, for providing air pressure buffering before the tension force is transmitted to the patient's skin.

[0117] The sustained-release airbag assembly 800 includes:

[0118] The airbag unit 810 is mounted on the bonding substrate 100. The airbag unit 810 is a buffer layer that comes into direct contact with the patient's limb. By changing the internal air pressure, it can dynamically adjust and slowly release the blood pressure-relieving force, thereby reducing the risk of vascular injury and improving patient comfort.

[0119] The pneumatic adjustment unit 820 is installed on the locking base 200 and is connected to the airbag unit 810 through the adjustment hose. This unit is responsible for precisely controlling the inflation and deflation process of the airbag unit 810. It is the actuator for realizing the slow release function, and its response speed and accuracy directly affect the slow release effect.

[0120] The monitoring unit, installed on the bonding substrate 100, is used to monitor the patient's condition and the pressure of the balloon unit 810. The monitoring unit is the brain of the sustained-release system, which acquires key physiological data and pressure data in real time, provides decision-making basis for the intermittent control unit, and ensures the safety and effectiveness of hemostasis.

[0121] And an intermittent control unit, electrically connected to the pneumatic adjustment unit 820, and through the built-in logic preset in the intermittent control unit, to control the airbag; the intermittent control unit is the core intelligent control center of the slow-release module 700. It receives monitoring data, makes judgments according to preset algorithms, and outputs commands to control the pneumatic adjustment unit 820 to achieve intermittent or gradient pressure management.

[0122] Furthermore, the airbag unit 810 includes:

[0123] Several independent air chambers are bonded and fixed to the arc-shaped contact surface 110 of the bonding substrate 100 in a parallel arrangement. The design of independent air chambers allows the airbag to better adapt to the complex shape of the limb and avoid uneven local pressure caused by the inflation and deflation of the overall airbag, thereby improving the uniformity of pressure and comfort.

[0124] It also includes several miniature pressure-limiting valves, which are located between the independent air chambers and the regulating hoses to control the inflation pressure of each air chamber and prevent local overpressure of the airbag from damaging the patient's skin. The introduction of miniature pressure-limiting valves further enhances safety, effectively limiting the pressure of a single air chamber and protecting the patient's tissues even in the event of system control failure or abnormal local pressure.

[0125] The independent air chambers are made of high-molecular elastic material and are equipped with anti-explosion ribs to maintain structural stability under abnormal conditions. Furthermore, by controlling the inflation level of different air chambers, the pressure at different locations can be adjusted in stages, improving the adaptability and comfort of the hemostatic device.

[0126] Furthermore, the pneumatic adjustment unit 820 includes:

[0127] A miniature electric air pump is mounted on the locking base 200 and located directly below the tension adjustment assembly 400. As an air source, the miniature electric air pump is responsible for quickly providing the required air pressure. Its small size and fast response are key characteristics of portable medical devices.

[0128] Several safety relief valves are provided, each corresponding to one of the independent air chambers, and are installed on the independent air chambers to automatically release pressure when the airbag pressure exceeds a preset safety threshold. The independent setting of the safety relief valves further enhances the safety redundancy of the system, ensuring that even if an abnormally high pressure occurs in a certain air chamber, it can be released in time to avoid local pressure injury.

[0129] Furthermore, the monitoring unit includes:

[0130] A flexible pressure sensor is attached to the buffer area between the covering tape 500 and the bonding substrate 100 to detect the surface pressure of the slow-release airbag in real time. The flexible pressure sensor can accurately and non-invasively monitor the actual pressure of the airbag in contact with the limb, providing accurate feedback data for subsequent intelligent control.

[0131] Physiological parameter sensors, such as skin temperature sensors, pulse sensors, or blood oxygen sensors, are disposed on the arc-shaped contact surface 110 of the bonding substrate 100 to monitor the physiological parameters of the patient's compressed limb in real time and transmit the monitoring data to the intermittent control unit. The introduction of physiological parameter sensors enables the tourniquet to monitor the patient's vital signs in real time, and can promptly detect and warn of potential tissue ischemia or damage, thereby achieving a higher level of safety assurance.

[0132] Furthermore, the intermittent control unit includes:

[0133] The microcontroller, with its internal preset control logic and algorithms, receives data from the monitoring unit and outputs control signals to the pneumatic adjustment unit 820. Thus, it can automatically control the inflation and deflation of the airbag according to preset hemostasis time and pressure thresholds, achieving intermittent or gradient pressure release. Simultaneously, it should have a data storage module for recording pressure and physiological parameters, as well as a communication interface for convenient data export or remote upgrades, such as Bluetooth or USB.

[0134] The power management module provides a stable power supply for the microcontroller, the pneumatic regulating unit 820, and the monitoring unit.

[0135] It also includes a user interaction module, including a display screen and operation buttons, for displaying airbag pressure, patient physiological parameters, setting a slow-release mode, or manually triggering release.

[0136] Furthermore, the release module 700 includes a lifting gap component 900, which is disposed between the locking base frame 200 and the tension adjustment component 400. It is used to control the height position of the tension adjustment component 400 relative to the bonding substrate 100, thereby indirectly adjusting the pressure applied to the limb by the tension restraint strap 300.

[0137] The lifting distance component 900 includes:

[0138] Two lifting base slots 910 are vertically opened on both sides of the locking base frame, and the tension adjustment assembly slides with the locking base frame 200 through the lifting base slots 910;

[0139] The spacing support unit 920 is installed in the lifting base groove 910 and connected to the tension adjustment assembly 400. The spacing support unit 920 is the core execution structure for realizing the lifting of the tension adjustment assembly 400. Through its own movement, it directly changes the effective arm length of the tension force applied, thereby precisely adjusting the pressure on the limb.

[0140] The spacing control unit 930 is installed on the locking base 200 and is linked with the spacing support unit 920 to change the vertical spacing between the tension adjustment component 400 and the bonding substrate 100, thereby indirectly adjusting the tightness of the tension constraint band 300. The spacing control unit 930 is the power and control source for driving the spacing support unit 920 to achieve precise vertical displacement. Its accuracy and stability directly affect the final pressure adjustment effect.

[0141] Specifically, the lifting base groove 910 serves as a guide rail for the vertical movement of the tension adjustment assembly 400. It can be designed as a dovetail groove, T-groove, or U-groove structure, with its internal surface precision-machined or coated with a low-friction material to ensure smooth, jam-free sliding of the tension adjustment assembly 400. The depth and length of the lifting base groove 910 should be sufficient to provide the required lifting range for effective pressure regulation. To increase strength and durability, the lifting base groove 910 can be made of high-strength engineering plastics or lightweight metal alloys.

[0142] In addition, the lifting base 910 can also be configured as a linear rolling guide to provide higher motion accuracy and load-bearing capacity.

[0143] Furthermore, the spacing support unit 920 includes:

[0144] The pitch screw has one end connected to the drive shaft of the pitch control unit 930, and its nut part is fixedly connected to the bottom of the tension adjustment assembly 400 to achieve low friction and high precision vertical movement. The pitch screw converts rotational motion into highly precise linear displacement through threaded transmission, making it an ideal choice for achieving fine pressure adjustment.

[0145] The anti-deflection guide column slides in conjunction with the tension adjustment assembly 400 to further ensure the stability of the tension adjustment assembly 400 during the lifting and lowering process and prevent tilting. The anti-deflection guide column effectively avoids the shaking or jamming that may occur during the lifting and lowering process of the tension adjustment assembly 400, ensuring the smoothness and reliability of the movement.

[0146] Specifically, the nut portion of the pitch screw is connected to the adjusting base frame 411 or the tensioning base frame 421, and the anti-deflection guide column is in sliding engagement with the adjusting base frame 411 or the tensioning base frame 421.

[0147] Meanwhile, the spacing support unit 920 can also be configured as a scissor linkage mechanism, which realizes lifting and lowering movement through multiple cross-connected links, and changes the vertical height of the tension adjustment component 400 by driving the extension or rotation of one of the links through the spacing control unit 930; the scissor linkage mechanism can provide a larger lifting range and better load-bearing capacity, and is suitable for scenarios that require a larger pressure adjustment range.

[0148] In addition, the spacing support unit 920 can also be configured as a gear and rack transmission mechanism, wherein the rack is fixed to the side of the tension adjustment component 400, and the gear is connected to the drive shaft of the spacing control unit 930. The rotation of the gear drives the rack to move in the vertical direction. The gear and rack mechanism has a simple structure and reliable transmission, and is suitable for lifting applications that require high rigidity and fast response.

[0149] Furthermore, the spacing control unit 930 includes:

[0150] A miniature stepper motor, whose output shaft is connected to the drive component of the spacing support unit 920 via a precision reduction gear structure, such as a lead screw or gear, is used to precisely control the lifting and lowering displacement of the spacing support unit 920.

[0151] A position encoder is used to monitor the vertical position of the spacing support unit 920 in real time and feed the position data back to the control module;

[0152] The control module is located outside the locking base 200 and is used by the user to manually input spacing adjustment commands to control the height position of the tension adjustment component 400 relative to the bonding substrate 100.

[0153] It is worth noting that the lifting spacing component 900 and the sustained-release airbag component 800 can be linked together. The position encoder in the spacing control unit 930 is electrically connected to the aforementioned intermittent control unit, and the control module is linked to the aforementioned intermittent control unit. This linkage design enables the synergistic operation of the two sustained-release mechanisms, providing a more flexible, precise, and safer pressure management solution. For example, in the event of insufficient airbag pressure or abnormalities, the lifting spacing component 900 can serve as an auxiliary adjustment or backup safety mechanism.

[0154] More preferably, the connection unit 600 includes:

[0155] The first hook surface 610 or the first annular surface 620 is set at both ends of the tensioning restraint belt 300;

[0156] The second annular surface 630 or the second hook surface 660 covers a large area of ​​the back of the covering tape 500 and works in conjunction with the first hook surface 610 or the first annular surface 620 to achieve large-area adhesion.

[0157] Two tightening straps 640 are respectively set at both ends of the tensioning restraint strap 300;

[0158] And two sets of locking rings 650 are symmetrically arranged on both sides of the covering tape 500, and are respectively connected and cooperated with two tightening straps 640.

[0159] The first hook surface 610 and the second annular surface 630, as well as the first annular surface 620 and the second annular surface 630, all constitute a Velcro connection method, which has good reusability. Even after multiple applications of sticking and unsticking, it maintains strong adhesion, reducing usage costs. Furthermore, the Velcro connection method is simple to operate, requiring no additional tools, allowing medical personnel to quickly install and adjust the tourniquet.

[0160] Two tightening straps 640 and a locking ring 650 make the connection and disassembly process more convenient and quick. Medical staff can quickly adjust the tightness of the tourniquet according to the actual situation to improve the hemostasis effect.

[0161] The technical features of this invention not described can be implemented by or using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this invention, and this invention is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this invention should also be within the protection scope of this invention.

Claims

1. A quick-locking tourniquet, characterized in that, include: The bonding substrate (100) has an arc-shaped contact surface (110) on its outer surface that fits the patient's skin, and the bonding substrate (100) has symmetrically opened locking grooves (120). A locking base frame (200) is installed on the side of the bonding substrate (100) away from the bonding arc surface; The tension restraint band (300) has its two ends respectively inserted into the two locking grooves (120) of the bonding substrate (100). It is mounted on the locking base frame (200) by a tension adjustment assembly (400), and the tension adjustment assembly (400) is used as an adjustment component to apply and adjust the tension force of the tension restraint band (300). The slow-release module (700) is linked to the tension adjustment component (400) and is used to adjust the tension force applied by the tension adjustment component (400) to the tension restraint band (300); The covering band (500) is wider than the tension restraint band (300), and its two ends are fixedly connected to the two ends of the tension restraint band (300) by connecting units (600); wherein the covering band (500) and the tension restraint band (300) together form an annular hemostatic space for accommodating the patient's limb. The sustained-release module (700) includes a sustained-release airbag assembly (800), which is installed on the arc-shaped contact surface (110) side of the bonding substrate (100) and located below the action path of the tension restraint band (300) to provide air pressure buffer before the tension force is transmitted to the patient's skin; the sustained-release module (700) includes a lifting gap assembly (900), which is disposed between the locking base frame (200) and the tension adjustment assembly (400) to control the height position of the tension adjustment assembly (400) relative to the bonding substrate (100), thereby indirectly adjusting the pressure applied to the limb by the tension restraint band (300); Furthermore, the position encoder in the lifting distance assembly (900) is electrically connected to and linked with the control unit of the sustained-release airbag assembly (800); when the airbag pressure is abnormal or the adjustment is limited, the lifting distance assembly (900) intervenes as an auxiliary adjustment or backup safety mechanism. The lifting distance assembly (900) includes: Two lifting base slots (910) are vertically opened on both sides of the locking base frame, and the tension adjustment assembly slides with the locking base frame (200) through the lifting base slots (910); The spacing support unit (920) is installed in the lifting base groove (910) and connected to the tension adjustment assembly (400); And a spacing control unit (930) is installed on the locking base (200) and is linked with the spacing support unit (920) to change the vertical spacing between the tension adjustment component (400) and the bonding substrate (100) to indirectly adjust the tightness of the tension constraint band (300).

2. The quick-locking tourniquet as described in claim 1, characterized in that, The tension adjustment assembly (400) includes: Adjustable base frame (411) is mounted on the locking base frame (200); The adjusting drum (412) is rotatably connected to the adjusting base frame (411) at both ends, and an adjusting through groove (413) is provided on it. The output end of the adjusting rotating component (414) passes through the adjusting base frame (411) and is fixedly connected to one end of the adjusting rotating cylinder (412); And a self-locking unit (415) is provided at the other end of the adjusting cylinder (412) to prevent the adjusting cylinder (412) from accidentally loosening after adjustment; The tensioning constraint band (300) is provided at one time, and the tensioning constraint band (300) passes through the regulating groove (413) and is wrapped around the regulating drum (412).

3. The quick-locking tourniquet as described in claim 2, characterized in that, The self-locking unit (415) includes: A ratchet (416) is fixed to one end of the adjusting cylinder (412) and is provided with annular teeth; The pawl is pivotally connected to the adjusting base (411) and engages with the teeth of the ratchet (416) to prevent the adjusting drum (412) from rotating in the opposite direction; A pawl return spring is used to provide force to keep the pawl engaged with the ratchet (416); And a release element (417), which is linked to the pawl, when the release element is operated, the pawl disengages from the ratchet (416), thereby allowing the adjusting drum (412) to rotate.

4. A quick-locking tourniquet as described in claim 1, characterized in that, The tension adjustment assembly (400) includes: The tensioning base frame (421) is installed on the locking base frame (200); The first roller (422) is rotatably connected to the tensioning base frame (421) at both ends, and a first gear (423) is provided at one end. The second roller (424) is rotatably connected to the tensioning base frame (421) at both ends, and a second gear (425) is provided at one end to mesh with the first gear (423). A reversing adjustment unit (426) is provided on the locking base (200) and is used to reverse the rotation direction of the first roller (422) and the second roller (424) and rotate synchronously. The tension control (427) has its output end passing through the tension base frame (421) and is fixedly connected to the other end of the first roller (422) or the second roller (424); And a locking unit (428) is provided on the tensioning base (421) to prevent the first roller (422) and the second roller (424) from accidentally loosening after adjustment; Two tensioning constraint bands (300) are provided, and the two tensioning constraint bands (300) pass through the locking groove (120) respectively, and the two tensioning constraint bands (300) are fixedly connected to the first roller (422) and the second roller (424) respectively.

5. A quick-locking tourniquet as described in claim 4, characterized in that, The inverting adjustment unit (426) includes: The first bevel gear is disposed at one end of the first roller (422); The second bevel gear is disposed at one end of the second roller (424) and has the same tooth profile as the first bevel gear; And an intermediate bevel gear, pivotally connected to the locking base (200), and simultaneously meshing with the first bevel gear and the second bevel gear to achieve the reverse synchronous rotation of the first roller (422) and the second roller (424).

6. A quick-locking tourniquet as described in claim 1, characterized in that, The sustained-release airbag assembly (800) includes: An airbag unit (810) is mounted on the bonding substrate (100); A pneumatic adjustment unit (820) is mounted on the locking base (200) and is connected to the airbag unit (810) via an adjustment hose; A monitoring unit, mounted on the bonding substrate (100), is used to monitor the patient's condition and the pressure of the balloon unit (810); And an intermittent control unit, electrically connected to the pneumatic adjustment unit (820), and through the built-in logic preset in the intermittent control unit, to control the airbag.

7. A quick-locking tourniquet as described in claim 1, characterized in that, The connection unit (600) includes: The first hook surface (610) or the first annular surface (620) is set at both ends of the tensioning restraint band (300); The second annular surface (630) or the second hook surface (660) covers a large area of ​​the back of the covering tape (500) and works in conjunction with the first hook surface (610) or the first annular surface (620) to bond over a large area. Two tightening straps (640) are respectively located at both ends of the tensioning restraint strap (300); And two sets of locking rings (650) are symmetrically arranged on both sides of the covering tape (500) and are respectively connected and cooperated with two tightening straps (640).

8. A quick-locking tourniquet as described in claim 1, characterized in that, Two sets of smooth rotating frames that cooperate with the locking groove (120) are symmetrically provided at the bottom end of the locking base frame (200). The smooth rotating frame is provided with a smooth rotating cylinder (130) that cooperates with the tensioning restraint belt (300). Each set of smooth rotating frames includes two smooth rotating frames symmetrically located on both sides of the locking groove (120).

9. A quick-locking tourniquet as described in claim 1, characterized in that, The locking base (200) is provided with a protective buckle cover (140) that cooperates with the locking base, and the protective buckle cover (140) is provided with a control panel slot that cooperates with the slow-release module (700).

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