Tourniquet with automatic fault switching function

Abstract

The invention relates to the technical field of medical instruments, in particular to a tourniquet with an automatic fault switching function, which comprises a shell, a driving box is fixedly connected to the inner bottom wall of the shell, a telescopic part is fixedly connected to the inner side wall of the driving box, a sliding plate is fixedly connected to an output shaft of the telescopic part, and the sliding plate is in transverse sliding fit with the inner side wall of the driving box; the inner bottom wall of the shell is rotationally matched with a rotating column, and a transmission assembly is arranged on one side of the driving box. A hemostasis air bag is transversely matched below the shell in a sliding mode, and an inflation assembly is arranged on the shell. An emergency assembly is arranged on the top wall in the shell, and a tightening assembly is arranged at the bottom end of the rotating column. When power is not cut off, the hemostasis air bag is inflated through the inflation assembly to be expanded, and pneumatic compression hemostasis is achieved; when power is off, driving force is provided for the rotating column through the emergency assembly, so that the rotating column drives the tightening assembly to operate, the hemostasis air bag is further tightened, and a fault prompt is sent to a user through tightening of the hemostasis air bag.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a tourniquet with automatic fault switching function. BACKGROUND

[0002] In modern war injury rescue, effectively controlling massive hemorrhage is the key link to reduce the casualty rate and gain time for evacuation. At present, the army generally uses a rotary tourniquet as an emergency equipment for limb hemostasis under field conditions. The standard operation process is as follows: a nylon strap is wrapped around the limb near the wound of the wounded person, the buckle is tightened, then the strap is mechanically tightened by manually rotating the winding rod until the wound stops bleeding, and finally the winding rod is fixed and the use time is recorded. Although this device can achieve hemostasis, it has simple structure, but in actual application, especially in intense and complex battlefield environment, it has obvious limitations: first, its hemostatic efficiency completely depends on the manual operation and physical strength of the rescuer or the wounded person, if the winding rod is damaged, the buckle slips, or the wounded person is exhausted due to blood loss and has no one to assist, the hemostatic operation may not be completed or the effect is insufficient; second, the process of manual tightening lacks objective and consistent pressure control standard, which is easy to cause insufficient or excessive compression due to the experience difference of the rescuer, resulting in hemostatic failure or limb injury.

[0003] To overcome the shortcomings of traditional tourniquets, some improved patents have appeared in the prior art. For example, some designs (such as CN115778473A) use compressed gas cylinders to achieve rapid inflation and pressurization, simplifying the operation steps; another scheme (such as CN116439775A) integrates a pressure sensor and a display unit, aiming to realize real-time monitoring and manual adjustment of the compression force. However, these improvements are still essentially designed for regular and stable medical or civilian first aid environments, and the premise of their effective operation is that the equipment itself is in good condition, the energy supply is stable, and the operating environment is relatively controllable. This type of hemostatic device does not fully consider the extreme conditions faced by joint logistics support troops in field combat: the equipment may be in standby or use state for a long time and cannot obtain charging supply, resulting in power depletion; it may also be damaged due to impact, vibration, moisture, dust and other factors on the battlefield, resulting in mechanical structure failure, circuit damage or sensor malfunction.

[0004] In this case, the hemostatic device relying on a single working mode (whether mechanical, electric or pneumatic) faces the risk of interruption of the entire rescue process if its core function fails due to one of the above reasons, thus putting the wounded person in danger. Therefore, the existing technical solutions have obvious shortcomings in "continuous reliability" and "environmental adaptability", and it is difficult to meet the requirements of intelligence, high reliability and toughness of rescue equipment on future battlefields.

[0005] In summary, the field of field first aid urgently needs a tourniquet that can adapt to harsh environments, has intelligent control capabilities, and can automatically and seamlessly switch to a backup working mode (such as a mechanical emergency mode) when the main working mode (such as an electric mode) fails due to power failure or component failure. This dual-mode or redundant design concept is a key technical breakthrough direction to ensure uninterrupted tourniquet support in complex and unpredictable battlefield conditions. SUMMARY

[0006] To solve the above problems, the present application provides a field tourniquet with automatic fault switching function. Under normal power supply conditions, the tourniquet inflates the tourniquet air bag through the inflation assembly to make it expand, achieving rapid and uniform pneumatic compression hemostasis; when the device detects power interruption or main air path failure, it can automatically switch to emergency mechanical mode. In this mode, the emergency assembly will provide driving force to the rotating column to drive the tightening assembly to mechanically tighten the tourniquet air bag, so that reliable hemostatic pressure can still be maintained in the event of power failure. At the same time, the mechanical tightening action of the tourniquet air bag itself can serve as an intuitive tactile signal to alert the rescuer that the device has entered a backup working state, serving both as a fault warning and a continuous support.

[0007] To achieve the above purpose, the technical scheme of the present application is as follows: a tourniquet with automatic fault switching function, comprising a controller and a housing, the inner bottom wall of the housing is fixedly connected with a drive box, the inner side wall of the drive box is fixedly connected with an extension piece, the controller is used for controlling the opening and closing of the extension piece, the output shaft of the extension piece is fixedly connected with a sliding plate, and the sliding plate is in transverse sliding cooperation with the inner side wall of the drive box. The inner bottom wall of the housing is rotatably connected with a rotating column, and one side of the drive box is provided with a transmission assembly for driving the rotating column to rotate. A tourniquet air bag is transversely slidably connected below the housing, and the housing is provided with an inflation assembly for inflating the tourniquet air bag. The inner top wall of the housing is provided with an emergency assembly for driving the rotating column to rotate in the event of power failure, and the bottom end of the rotating column is provided with a tightening assembly for tightening the tourniquet air bag in the event of power failure.

[0008] The technical principle of the above scheme is as follows: The user moves the tourniquet to the predetermined hemostatic position, controls the extension piece to start through the controller, makes the extension piece output shaft drive the sliding plate to move transversely, inflates the tourniquet air bag through the inflation assembly to make it expand, and performs annular compression hemostasis on the user's limb. At the same time, the extension piece output shaft also drives the transmission assembly to operate, so that it drives the rotating column to rotate and stores energy for the emergency assembly. When power failure occurs, the emergency assembly operates, which drives the rotating column to rotate and drives the tightening assembly to operate through the rotating column to tighten the tourniquet air bag.

[0009] The above scheme has the following beneficial effects: 1. The application inflates the hemostatic air bag through the inflation assembly to make it expand when there is no power failure, realizing pneumatic compression hemostasis; when there is power failure, the emergency assembly provides driving force for the rotating column to drive the tightening assembly to operate, further tightening the hemostatic air bag, and prompting the user of failure through the tightening of the hemostatic air bag.

[0010] 2. The application realizes annular compression of the user's limbs through pneumatic compression of the hemostatic air bag, making the pressure distribution more uniform and reducing the local pressure difference caused by uneven binding of the existing tourniquet.

[0011] 3. The hemostatic air bag of the application inflates to compress the user's limbs without contacting the user's wound, reducing the user's risk of infection, and also reducing the adjustment of the binding position of the tourniquet, thereby reducing secondary injury to the user caused by adjustment of the binding position.

[0012] Further, the transmission assembly includes a transmission plate laterally slidingly fitted to the inner side wall of the drive box, the drive box is provided with a concave transmission frame on one side, the transmission frame extends through the side wall of the drive box to the inside of the drive box at one end and is fixedly connected with the transmission plate, a rack is fixedly connected to one side of the inner side wall of the transmission frame, and a transmission gear is fixedly connected to the rotating column, the rack and the transmission gear are in mesh.

[0013] Beneficial effect: the design that the rack in the inner side wall of the transmission frame is in mesh with the transmission gear makes the transmission gear located inside the transmission frame, so that it can be limited by the transmission frame during rotation, reducing the deviation of the transmission gear during rotation and improving its rotation stability.

[0014] Further, the inflation assembly includes a first air inlet one-way valve, a second air inlet one-way valve, a normally open electromagnetic valve and an inflation pipe connected to the drive box, the controller is used to control the normally open electromagnetic valve to remain closed in the powered state, the inflation pipe is communicated with an air outlet one-way valve at the communication part with the drive box, and the end of the inflation pipe away from the drive box extends through the bottom wall of the shell to below the shell and is communicated with the hemostatic air bag. A pressure sensor and a buzzer are fixedly connected to the hemostatic air bag, the controller is used to receive the pressure signal collected by the pressure sensor and control the opening and closing of the buzzer based on the pressure signal.

[0015] Beneficial effect: the use of the normally open electromagnetic valve makes it remain closed when powered, which can pressurize the gap between the sliding plate and the transmission plate, so that the transmission plate moves laterally and drives the transmission frame to move laterally. When there is power failure, the normally open electromagnetic valve is opened, and the gas in the gap between the sliding plate and the transmission plate escapes from it, so that the transmission frame can move towards its initial position.

[0016] Furthermore, the rotating column is equipped with a manual hemostasis assembly for manual hemostasis in the event of a power outage. The manual hemostasis assembly includes a hemostasis column coaxially fixedly connected to the top of the rotating column, and the hemostasis column extends through the top of the housing and is fixedly connected to a hemostasis rod outside the housing.

[0017] Beneficial effects: The design of the hemostatic column and hemostatic rod allows the user to further adjust the tightness of the hemostatic airbag by rotating the hemostatic rod even in the event of a power outage, thereby ensuring the hemostatic effect of the device.

[0018] Furthermore, the tightening assembly includes a tightening shaft that penetrates the bottom wall of the housing and rotatably engages with it. An upper tightening wheel and a lower tightening wheel are coaxially and fixedly connected to the upper and lower parts of the tightening shaft, respectively. The upper tightening wheel is located inside the housing, and the lower tightening wheel is located below the housing. A meshing wheel is coaxially and fixedly connected to the lower part of the rotating column. Gear plates are symmetrically and slidably fitted at the bottom of the housing, each meshing with the lower tightening wheel and fixedly connected to one end of its adjacent hemostatic airbag. Electromagnets are fixedly connected to the bottom of the upper tightening wheel and the inner bottom wall of the housing. A controller is used to control the opening and closing of the electromagnets; adjacent electromagnets attract each other when energized. Permanent magnets are fixedly connected to the top of the lower tightening wheel and the bottom of the housing; adjacent permanent magnets attract each other. The attractive force generated by the electromagnets when energized is greater than the attractive force between the permanent magnets. When the device is energized, the upper tightening wheel and the meshing wheel are located on different planes; when the device is de-energized, the upper tightening wheel and the meshing wheel are located on the same plane, and the upper tightening wheel meshes with the meshing wheel.

[0019] Beneficial effects: By engaging the toothed plate with the lower tightening wheel, the lower tightening wheel rotates and causes the toothed plates to move closer together. This, in turn, causes the two ends of the hemostatic airbag to move closer together, thus tightening the hemostatic airbag. The combination of the electromagnet and permanent magnet ensures that when the device is energized, the upper tightening wheel and the engaging wheel are on different planes; when the power is off, the upper tightening wheel engages with the engaging wheel, thereby achieving mode switching.

[0020] Furthermore, the tightening assembly includes a tightening shaft that penetrates the bottom wall of the housing and rotatably engages with it. An upper tightening wheel and a tightening block are coaxially and fixedly connected to the upper and lower parts of the tightening shaft, respectively. The upper tightening wheel is located inside the housing, and the tightening block is located below the housing. A meshing wheel is coaxially and fixedly connected to the lower part of the rotating column. Both ends of the hemostatic airbag are fixedly connected to and communicate with tightening airbags, with the ends of the tightening airbags furthest from the hemostatic airbag fixedly connected to the tightening block. Electromagnets are fixedly connected to the bottom of the upper tightening wheel and the bottom wall of the housing. A controller is used to control the opening and closing of the electromagnets; adjacent electromagnets attract each other when energized. Permanent magnets are fixedly connected to the top of the tightening block and the bottom of the housing; adjacent permanent magnets attract each other. The attractive force generated by the electromagnets when energized is greater than the attractive force between the permanent magnets. When the device is energized, the upper tightening wheel and the meshing wheel are located on different planes; when the device is de-energized, the upper tightening wheel and the meshing wheel are located on the same plane, and the upper tightening wheel meshes with the meshing wheel.

[0021] Beneficial effects: By fixing the tightening airbag to the tightening block and connecting its other end to the hemostatic airbag, the tightening block can roll up the tightening airbag when it rotates, thereby causing the two ends of the hemostatic airbag to come closer together, thus achieving the tightening operation of the hemostatic airbag.

[0022] Furthermore, the tightening assembly includes a tightening shaft that penetrates the bottom wall of the housing and rotatably engages with it. An upper tightening wheel and a lower tightening wheel are coaxially and fixedly connected to the upper and lower parts of the tightening shaft, respectively. The upper tightening wheel is located inside the housing, and the lower tightening wheel is located below the housing. A meshing wheel is coaxially and fixedly connected to the lower part of the rotating column. Gear plates are symmetrically and slidably fitted at the bottom of the housing, each meshing with the lower tightening wheel and fixedly connected to one end of its adjacent hemostatic airbag. A tightening plate is coaxially and rotatably fitted to the top of the lower tightening wheel. Electromagnets are fixedly connected to the top of the tightening plate and the bottom of the housing. A controller is used to control the opening and closing of the electromagnets; adjacent electromagnets repel each other when energized. Several springs are fixedly connected to the top of the tightening plate, with the ends of the springs furthest from the tightening plate fixedly connected to the bottom of the housing. The repulsive force generated when the electromagnets are energized is greater than the traction force of the springs. When the device is powered on, the upper tensioning wheel and the meshing wheel are located on different planes; when the device is powered off, the upper tensioning wheel and the meshing wheel are located on the same plane, and the upper tensioning wheel and the meshing wheel are engaged.

[0023] Beneficial effects: By using a combination of spring and electromagnet, when energized, the spring can be stretched under the repulsive force of the electromagnet. When de-energized, the spring moves back to its initial position under the action of its restoring force, causing the upper tensioning wheel to engage with the meshing wheel.

[0024] Furthermore, the emergency component includes a support rod fixedly connected to the top wall inside the housing, an elastic band fixedly connected to the support rod, an emergency drive cylinder fixedly connected to the upper part of the rotating column, and the end of the elastic band away from the support rod fixedly connected to the outer wall of the emergency drive cylinder.

[0025] Beneficial effects: When the emergency drive cylinder is driven to rotate by the rotating column, it can stretch the elastic band and store it inside the emergency drive cylinder. At this time, the elastic band generates elastic potential energy after being stretched. When the power is off, the elastic potential energy generated by the stretching of the elastic band can be used as a driving force to drive the emergency storage cylinder and the rotating column to rotate, so that the device can still operate in the power-off state.

[0026] Furthermore, the top of the housing is provided with a locking assembly for locking the hemostatic rod. The locking assembly includes a "U"-shaped locking rod. The top of the housing has a fixing hole and several locking holes. One end of the locking rod is detachably connected to the fixing hole, and the other end of the locking rod is detachably connected to one of the locking holes.

[0027] Beneficial effects: By setting a locking rod and several locking holes in different positions, the user can fix both ends of the locking rod in the fixing hole and the locking hole respectively after rotating the hemostatic rod, thereby limiting the hemostatic rod and reducing the decrease in hemostatic pressure caused by the loosening of the hemostatic rod.

[0028] Furthermore, a limiting plate is fixedly connected to the side of the toothed plate away from the hemostatic airbag.

[0029] Beneficial effects: When the toothed plate moves laterally, the limiting plate can restrict its range of movement, reducing sudden changes in hemostatic pressure caused by excessive displacement of the toothed plate, thus protecting the user.

[0030] Additional aspects and advantages of the invention 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 the invention. Attached Figure Description

[0031] Figure 1 This is an isometric view of an embodiment of the tourniquet with automatic fault switching function according to Embodiment 1 of the present invention; Figure 2 This is an isometric schematic diagram of the transmission component of the tourniquet embodiment with automatic fault switching function in Embodiment 1 of the present invention; Figure 3 This is a side sectional view of an embodiment of the tourniquet with automatic fault switching function according to Embodiment 1 of the present invention; Figure 4 This is a bottom view of the casing of the tourniquet embodiment with automatic fault switching function in Embodiment 1 of the present invention; Figure 5 for Figure 3 An enlarged schematic diagram of part A in the middle; Figure 6 This is a side sectional view of the tightening component in the tourniquet with automatic fault switching function embodiment 1 of the present invention; Figure 7 This is a side sectional view of the tightening component in the tourniquet embodiment with automatic fault switching function of Embodiment 2 of the present invention; Figure 8 This is a side cross-sectional view of the tightening component in the tourniquet embodiment with automatic fault switching function in Embodiment 3 of the present invention.

[0032] The reference numerals in the accompanying drawings of the instruction manual include: 1. Housing; 2. Drive box; 3. Sliding plate; 4. Electric telescopic rod; 5. Rotating column; 6. Transmission plate; 7. Transmission frame; 8. Rack; 9. Transmission gear; 10. Hemostatic airbag; 11. First air inlet check valve; 12. Second air inlet check valve; 13. Normally open solenoid valve; 14. Inflation pipe; 15. Air outlet check valve; 16. Pressure sensor; 17. Buzzer; 18. Elastic band; 19. Emergency drive cylinder; 20. Tightening shaft; 21. Upper tightening wheel; 22. Lower tightening wheel; 23. Meshing wheel; 24. Gear plate; 25. Limiting plate; 26. Electromagnet; 27. Permanent magnet; 28. Hemostatic rod; 29. ​​Locking rod; 30. Tightening block; 31. Tightening airbag; 32. Spring; 33. Tightening plate. Detailed Implementation

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The following detailed description illustrates the specific implementation method: Example 1: As attached Figure 1 , Figure 2 and Figure 5As shown: A tourniquet with automatic fault switching function includes a controller and a housing 1. A drive box 2 is welded to the bottom wall of the inner wall of the housing 1. A telescopic component is fixedly connected to the inner side wall of the drive box 2 with screws. The controller is used to control the opening and closing of the telescopic component. A sliding plate 3 is fixedly connected to the output shaft of the telescopic component with screws. The sliding plate 3 slides laterally with the inner side wall of the drive box 2. In this embodiment, an electric telescopic rod 4 is selected as the telescopic component.

[0037] A rotating column 5 is rotatably fitted onto the bottom wall of the housing 1, and a transmission assembly for driving the rotating column 5 to rotate is provided on one side of the drive box 2. A hemostatic airbag 10 is laterally slidably fitted onto the lower part of the housing 1, and an inflation assembly for inflating the hemostatic airbag 10 is provided on the housing 1. In this embodiment, as shown... Figure 1 and Figure 3 As shown, the shell 1 and the hemostatic airbag 10 form a ring structure.

[0038] like Figure 2 and Figure 5 As shown, the transmission assembly includes a transmission plate 6 that slides laterally against the inner wall of the drive box 2. A concave transmission frame 7 is provided on one side of the drive box 2. One end of the transmission frame 7 extends through the side wall of the drive box 2 and into the drive box 2, where it is welded to the transmission plate 6. A rack 8 is integrally formed on one side of the inner wall of the transmission frame 7. A transmission gear 9 is coaxially fixedly engaged on the rotating column 5. The rack 8 meshes with the transmission gear 9.

[0039] like Figure 2 and Figure 5 As shown, the inflation assembly includes a first intake check valve 11, a second intake check valve 12, a normally open solenoid valve 13, and an inflation pipe 14, all connected to the drive housing 2. The controller keeps the normally open solenoid valve 13 closed when energized. An outlet check valve 15 connects the inflation pipe 14 to the drive housing 2. One end of the inflation pipe 14, away from the drive housing 2, extends through the bottom wall of the housing 1 and connects to the hemostatic airbag 10 below the housing 1. In this embodiment, the normally open solenoid valve 13 is preferably a DF-A normally open solenoid valve.

[0040] like Figure 1 As shown, a pressure sensor 16 and a buzzer 17 are fixedly bonded to the hemostatic airbag 10. The controller receives the pressure signal collected by the pressure sensor 16 and controls the opening and closing of the buzzer 17 based on the pressure signal. In this embodiment, the flow direction of the first air inlet check valve 11 and the second air inlet check valve 12 is unidirectional from the outside of the drive box 2 to the inside of the drive box 2, and the flow direction of the outlet check valve 15 is unidirectional from the inside of the drive box 2 to the outside of the drive box 2. Figure 2 and Figure 5 As shown, the first intake check valve 11 and the exhaust check valve 15 are both located on one side of the sliding plate 3, and the second intake check valve 12 and the normally open solenoid valve 13 are both located between the transmission plate 6 and the sliding plate 3.

[0041] Specifically, the user moves the injured limb through the annular structure consisting of the hemostatic airbag 10 and the housing 1 to the predetermined hemostasis position. Then, the controller keeps the normally open solenoid valve 13 energized, keeping it in a closed state, and simultaneously controls the output shaft of the electric telescopic rod 4 to reciprocate. This causes the output shaft of the electric telescopic rod 4 to drive the sliding plate 3, which is fixed to it with screws, to slide laterally back and forth in the drive box 2. The first air inlet check valve 11 draws the gas outside the drive box 2 into the drive box 2, and then the gas in the drive box 2 is delivered to the hemostatic airbag 10 through the air outlet check valve 15 and the inflation tube 14, causing the hemostatic airbag 10 to inflate and expand, thus applying pressure to stop the bleeding of the injured limb.

[0042] During this process, the user sets the pressure threshold, and the controller monitors the pressure signal of the hemostatic airbag 10 on the injured limb in real time through the pressure sensor 16. When the pressure signal reaches the pressure threshold, the controller controls the electric telescopic rod 4 to stop running; when the pressure signal exceeds the pressure threshold, the controller activates the buzzer 17 to issue an alarm to the user.

[0043] like Figure 2 and Figure 5 As shown, when the sliding plate 3 reciprocates laterally, the gas outside the drive box 2 also enters the drive box 2 through the second intake check valve 12, which inflates the gap between the sliding plate 3 and the transmission plate 6 to increase the air pressure between them. As the air pressure increases, the transmission plate 6 moves laterally within the drive box 2. Since the transmission frame 7 is welded to the transmission plate 6 and the rack 8 is integrally formed with the transmission frame 7, when the transmission plate 6 moves laterally, it can sequentially drive the transmission frame 7 and the rack 8 to move laterally, causing the rack 8 to drive the transmission gear 9 meshing with it to rotate, which in turn drives the rotating column 5 to rotate through the transmission gear 9.

[0044] like Figure 2 and Figure 3 As shown, the inner top wall of the housing 1 is provided with an emergency assembly for rotating the rotating column 5 in the event of a power outage. The emergency assembly includes a support rod welded to the inner top wall of the housing 1, an elastic band 18 fixedly bonded to the support rod, an emergency drive cylinder 19 integrally formed on the upper part of the rotating column 5, and the end of the elastic band 18 away from the support rod being fixedly bonded to the outer wall of the emergency drive cylinder 19.

[0045] Specifically, when the rotating column 5 rotates, it can drive the emergency drive cylinder 19, which is integrally formed with it, to rotate, so that the emergency drive cylinder 19 stretches the elastic band 18 that is bonded to it, and at the same time winds up the stretched elastic band 18.

[0046] In the event of a power outage, the normally open solenoid valve 13 opens, allowing gas to escape between the transmission plate 6 and the sliding plate 3. This causes a drop in air pressure between them. When the transmission plate 6, transmission frame 7, and rack 8 are subjected to external force, they can move laterally towards their initial positions. At this time, because the elastic band 18 possesses elastic potential energy after stretching, it can sequentially drive the emergency drive cylinder 19 and the transmission gear 9 to rotate. The transmission gear 9 then sequentially drives the rack 8, transmission frame 7, and transmission plate 6 to move towards their initial positions.

[0047] like Figure 3 and Figure 6 As shown, the bottom end of the rotating column 5 is provided with a tightening assembly for tightening the hemostatic airbag 10 when the power is off. The tightening assembly includes a tightening shaft 20 that penetrates the bottom wall of the housing 1 and rotates with the bottom wall of the housing 1. The upper and lower parts of the tightening shaft 20 are respectively coaxially fixedly connected to an upper tightening wheel 21 and a lower tightening wheel 22. The upper tightening wheel 21 is located inside the housing 1, and the lower tightening wheel 22 is located below the housing 1. The lower part of the rotating column 5 is coaxially fixedly connected to a meshing wheel 23. The bottom of the housing 1 is symmetrically slidably fitted with toothed plates 24. Each toothed plate 24 meshes with the lower tightening wheel 22. Each toothed plate 24 is fixedly bonded to one end of its adjacent hemostatic airbag 10. The side of the toothed plate 24 away from the hemostatic airbag 10 is integrally formed with a limiting plate 25, such as... Figure 4 As shown.

[0048] Electromagnets 26 are embedded in the bottom of the upper tensioning wheel 21 and the inner bottom wall of the housing 1. The controller is used to control the opening and closing of the electromagnets 26. Adjacent electromagnets 26 attract each other when energized. Permanent magnets 27 are embedded in the top of the lower tensioning wheel 22 and the bottom of the housing 1. Adjacent permanent magnets 27 attract each other. The attractive force generated by the electromagnets 26 when energized is greater than the attractive force between the permanent magnets 27.

[0049] When the device is powered on, the upper tensioning wheel 21 and the meshing wheel 23 are located on different planes; when the device is powered off, the upper tensioning wheel 21 and the meshing wheel 23 are located on the same plane, and the upper tensioning wheel 21 and the meshing wheel 23 are engaged.

[0050] Specifically, when the rotating column 5 rotates, it drives the meshing wheel 23, which is fixedly engaged with it, to rotate. During the inflation of the hemostatic airbag 10, the controller controls the electromagnet 26 to remain energized, at which time adjacent electromagnets 26 attract each other. Since the attractive force of the electromagnet 26 when energized is greater than the attractive force between the permanent magnets 27, the upper tightening wheel 21 can fit against the inner bottom wall of the housing 1. At this time, the upper tightening wheel 21 and the meshing wheel 23 are located on different horizontal planes, and their movements do not interfere with each other.

[0051] When the power is off, the adjacent electromagnets 26 no longer attract each other, and the permanent magnets 27 attract each other, causing the lower tightening wheel 22 and the bottom of the housing 1 to attract each other and fit together. At this time, the tightening shaft 20 moves upward, driving the upper tightening wheel 21, which is fixedly engaged with it, to move upward. At this time, the upper tightening wheel 21 engages with the meshing wheel 23. Therefore, when the meshing wheel 23 rotates, it can drive the upper tightening wheel 21 to rotate. The upper tightening wheel 21 drives the tightening shaft 20 and the lower tightening wheel 22 to rotate in sequence. Then, the lower tightening wheel 22 drives the toothed plate 24, which is engaged with it, to move laterally, so that the adjacent toothed plates 24 move closer to each other. At this time, the two ends of the hemostatic airbag 10 move closer to each other and tighten.

[0052] like Figure 1 and Figure 2 As shown, the rotating column 5 is equipped with a manual hemostasis component for manual hemostasis when the power is off. The manual hemostasis component includes a hemostasis column coaxially integrally formed on the top of the rotating column 5, and a hemostasis rod 28 integrally formed on the outside of the housing 1 extending through the top of the housing 1.

[0053] Specifically, when the power is off, if the user needs to adjust the tightness of the hemostatic airbag 10, the hemostatic rod 28 can be rotated to drive the hemostatic column and the rotating column 5 to rotate in sequence, thereby adjusting the relative position of the two ends of the hemostatic airbag 10.

[0054] like Figure 1 As shown, the top of the housing 1 is provided with a locking assembly for locking the hemostatic rod 28. The locking assembly includes a "U"-shaped locking rod 29. The top of the housing 1 has a fixing hole and several locking holes. One end of the locking rod 29 is detachably engaged with the fixing hole, and the other end of the locking rod 29 is detachably engaged with one of the locking holes.

[0055] Specifically, after rotating the hemostatic rod 28, it can drive the rotating column 5 to rotate via the hemostatic column. Therefore, the rotating column 5 will drive the emergency drive cylinder 19 to rotate during the rotation, thereby stretching and winding the elastic band 18. At this time, in order to ensure that the hemostatic rod 28 is not driven to rotate by the elastic potential energy of the elastic band 18, the user locks the two ends of the locking rod 29 into the fixing hole and one of the locking holes respectively to limit the hemostatic rod 28.

[0056] When the power is not interrupted, the present invention can inflate the hemostatic airbag 10 through the inflation component to expand it and perform pneumatic compression hemostasis on the user's limb; when the power is interrupted, the emergency component provides driving force to the rotating column 5, which drives the tightening component to operate and further tighten the hemostatic airbag 10, and issues a fault prompt to the user through the tightening of the hemostatic airbag 10.

[0057] Example 2: The main difference between this embodiment and Embodiment 1 lies in the structure of the tightening component. Since the tightening component is used to tighten the hemostatic airbag 10 in the power-off state, in addition to the tightening component of Embodiment 1, the tightening component can also be as follows: Figure 7 As shown. Specifically, the tightening assembly includes a tightening shaft 20 that penetrates the bottom wall of the housing 1 and rotatably engages with the bottom wall of the housing 1. The upper and lower parts of the tightening shaft 20 are respectively coaxially fixedly connected to an upper tightening wheel 21 and a tightening block 30. The upper tightening wheel 21 is located inside the housing 1, and the tightening block 30 is located below the housing 1. The lower part of the rotating column 5 is coaxially fixedly connected to a meshing wheel 23. Both ends of the hemostatic airbag 10 are integrally formed and connected to a tightening airbag 31. The end of the tightening airbag 31 away from the hemostatic airbag 10 is fixedly bonded to the tightening block 30.

[0058] Electromagnets 26 are embedded in the bottom of the upper tensioning wheel 21 and the inner bottom wall of the housing 1. The controller is used to control the opening and closing of the electromagnets 26. Adjacent electromagnets 26 attract each other when energized. Permanent magnets 27 are embedded in the top of the tensioning block 30 and the bottom of the housing 1. Adjacent permanent magnets 27 attract each other. The attractive force generated by the electromagnets 26 when energized is greater than the attractive force between the permanent magnets 27.

[0059] When the device is powered on, the upper tensioning wheel 21 and the meshing wheel 23 are located on different planes; when the device is powered off, the upper tensioning wheel 21 and the meshing wheel 23 are located on the same plane, and the upper tensioning wheel 21 and the meshing wheel 23 are engaged. The rest of the structure is the same as in Embodiment 1.

[0060] Specifically, in this embodiment, when inflating the hemostatic airbag 10, the controller keeps the electromagnet 26 energized. At this time, adjacent electromagnets 26 attract each other when energized, and the attraction between adjacent electromagnets 26 is greater than that between adjacent permanent magnets 27, causing the upper tightening wheel 21 to attract and adhere to the inner bottom wall of the housing 1. At this time, the upper tightening wheel 21 and the meshing wheel 23 are located on different planes, and their movements do not interfere with each other.

[0061] When the power is off, the adjacent electromagnets 26 no longer attract each other. At this time, the tightening block 30 and the bottom of the housing 1 are attracted to each other by the adjacent permanent magnets 27, so that the tightening block 30 drives the tightening shaft 20 and the upper tightening wheel 21 to move upward in sequence. At this time, the upper tightening wheel 21 engages with the meshing wheel 23. When the meshing wheel 23 rotates, it can drive the upper tightening wheel 21, the tightening shaft 20 and the tightening block 30 to rotate in sequence. Then, the tightening block 30 rolls up the tightening airbag 31 that is attached to it, so that the two ends of the hemostatic airbag 10 come together and complete the tightening.

[0062] Example 3: The main difference between this embodiment and Embodiments 1 and 2 lies in the structure of the tightening component. Since the tightening component is used to tighten the hemostatic airbag 10 in the power-off state, in addition to the tightening components of Embodiments 1 and 2, the tightening component can also be as follows: Figure 8 As shown. Specifically, the tightening assembly includes a tightening shaft 20 that penetrates the bottom wall of the housing 1 and rotatably engages with the bottom wall of the housing 1. The upper and lower parts of the tightening shaft 20 are respectively coaxially fixedly connected to an upper tightening wheel 21 and a lower tightening wheel 22. The upper tightening wheel 21 is located inside the housing 1, and the lower tightening wheel 22 is located below the housing 1. The lower part of the rotating column 5 is coaxially fixedly connected to a meshing wheel 23. The bottom of the housing 1 is symmetrically slidably fitted with toothed plates 24. The toothed plates 24 are all meshed with the lower tightening wheels 22. The toothed plates 24 are all fixedly bonded to one end of the adjacent hemostatic airbag 10. The side of the toothed plates 24 away from the hemostatic airbag 10 is integrally formed with a limiting plate 25.

[0063] The top of the lower tensioning wheel 22 is coaxially fitted with a tensioning plate 33. Electromagnets 26 are embedded in the top of the tensioning plate 33 and the bottom of the housing 1. The controller is used to control the opening and closing of the electromagnets 26. Adjacent electromagnets 26 repel each other when energized. Several springs 32 are welded to the top of the tensioning plate 33. The ends of the springs 32 away from the tensioning plate 33 are welded to the bottom of the housing 1. The repulsive force generated by the electromagnets 26 when energized is greater than the traction force of the springs 32.

[0064] When the device is powered on, the upper tensioning wheel 21 and the meshing wheel 23 are located on different planes; when the device is powered off, the upper tensioning wheel 21 and the meshing wheel 23 are located on the same plane, and the upper tensioning wheel 21 and the meshing wheel 23 are engaged. The rest of the structure is the same as in Embodiment 1.

[0065] Specifically, in this embodiment, when the hemostatic airbag 10 is inflated, the controller keeps the electromagnet 26 energized. At this time, because adjacent electromagnets 26 repel each other when energized, and the repulsive force of the electromagnets 26 when energized is greater than the traction force of the spring 32, the tightening plate 33 can drive the lower tightening wheel 22 to move downwards until the upper tightening wheel 21 is in contact with the inner bottom wall of the housing 1. At this time, the spring 32 is stretched, and the upper tightening wheel 21 and the meshing wheel 23 are located on different planes, so their movements do not interfere with each other.

[0066] When the power is off, the adjacent electromagnets 26 no longer repel each other. Under the action of its restoring force, the spring 32 drives the tightening plate 33 to move upward. Then, through the tightening plate 33, the lower tightening wheel 22, the tightening shaft 20 and the upper tightening wheel 21 are driven upward in sequence. At this time, the upper tightening wheel 21 meshes with the meshing wheel 23. When the meshing wheel 23 rotates, it can drive the upper tightening wheel 21, the tightening shaft 20 and the lower tightening wheel 22 to rotate in sequence. Through the lower tightening wheel 22, the toothed plate 24 is driven to rotate, so that the adjacent toothed plates 24 move closer to each other. Then, through the toothed plates 24, the two ends of the hemostatic airbag 10 move closer to each other, thereby tightening the hemostatic airbag 10.

[0067] It should be noted that, regardless of the type of tightening component used in this application, as long as the hemostatic airbag 10 can be tightened, the overall structure of such a tightening component is within the scope of protection of this application.

[0068] Scope of Protection: The core inventive point of this invention lies in "automatic operation when powered on, applying pressure to the injured limb to stop bleeding; switching operating modes when powered off to tighten the hemostatic airbag 10, while also having a manual adjustment function to adjust the tightness of the hemostatic airbag 10." Its scope of protection specifically includes: 1. Transmission mechanism: Any structure that can inflate the hemostatic airbag 10 while driving the rotating column 5 to rotate is considered an equivalent replacement.

[0069] 2. Mode switching mechanism: Any structure that can switch the operating mode of the device when the power is off is considered an equivalent replacement.

[0070] 3. Tightening mechanism: Any structure that can tighten the hemostatic airbag 10 when the power is off is considered an equivalent replacement.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A tourniquet with automatic fault switching function, comprising a shell (1), a drive box (2) is fixedly connected to the inner bottom wall of the shell (1), characterized in that, The controller is used for controlling the opening and closing of the telescopic part, the output shaft of the telescopic part is fixedly connected with a sliding plate (3), and the sliding plate (3) is in transverse sliding cooperation with the inner side wall of the driving box (2); A rotating column (5) is in rotating cooperation with the inner bottom wall of the shell (1), and one side of the driving box (2) is provided with a transmission assembly for driving the rotating column (5) to rotate; a hemostasis air bag (10) is in transverse sliding cooperation below the shell (1), and the shell (1) is provided with an inflation assembly for inflating the hemostasis air bag (10); The inner top wall of the shell (1) and the bottom end of the rotating column (5) are respectively provided with an emergency assembly for driving the rotating column (5) to rotate when power failure occurs and a tightening assembly for tightening the hemostasis air bag (10).

2. The tourniquet with automatic fail-safe function according to claim 1, characterized in that, The transmission assembly comprises a transmission plate (6) which is in transverse sliding cooperation with the inner side wall of the driving box (2), one side of the driving box (2) is provided with a concave transmission frame (7), one end of the transmission frame (7) extends to the inside of the driving box (2) through the side wall of the driving box (2) and is fixedly connected with the transmission plate (6), the inner side wall of the transmission frame (7) is fixedly connected with a rack (8), and the rotating column (5) is fixedly connected with a transmission gear (9); the rack (8) is in meshing cooperation with the transmission gear (9).

3. The tourniquet with automatic fail-safe function according to claim 2, characterized in that, The inflation assembly comprises a first air inlet one-way valve (11), a second air inlet one-way valve (12), a normally open electromagnetic valve (13) and an inflation pipe (14) which are communicated with the driving box (2), the controller is used for controlling the normally open electromagnetic valve (13) to keep closed in the power-on state, the communication position of the inflation pipe (14) and the driving box (2) is communicated with an air outlet one-way valve (15), and one end of the inflation pipe (14) away from the driving box (2) extends to below the shell (1) and is communicated with the hemostasis air bag (10) through the bottom wall of the shell (1); The hemostasis air bag (10) is fixedly connected with a pressure sensor (16) and a buzzer (17), the controller is used for receiving a pressure signal collected by the pressure sensor (16) and controlling the opening and closing of the buzzer (17) based on the pressure signal.

4. The tourniquet with automatic fail-safe function according to claim 3, characterized in that, The rotating column (5) is provided with a manual hemostasis assembly for manually stopping hemostasis when power failure occurs, the manual hemostasis assembly comprises a hemostasis column which is coaxially fixedly connected to the top end of the rotating column (5), and the hemostasis column extends to the outside of the shell (1) through the top of the shell (1) and is fixedly connected with a hemostasis rod (28).

5. The tourniquet with automatic fail-safe function according to claim 4, characterized in that, The tightening assembly comprises a tightening shaft (20) which penetrates through the bottom wall of the shell (1) and is in rotating cooperation with the bottom wall of the shell (1), the upper part and the lower part of the tightening shaft (20) are coaxially fixedly connected with an upper tightening wheel (21) and a lower tightening wheel (22) respectively, the upper tightening wheel (21) is located in the shell (1), the lower tightening wheel (22) is located below the shell (1), and the lower part of the rotating column (5) is coaxially fixedly connected with an engaging wheel (23); the bottom of the shell (1) is symmetrically and slidingly connected with a toothed plate (24), the toothed plate (24) is in meshing cooperation with the lower tightening wheel (22), and the toothed plate (24) is fixedly connected with one end of the hemostasis air bag (10) adjacent thereto; The electromagnet (26) is fixedly connected to the bottom of the upper tightening wheel (21) and the inner bottom wall of the shell (1), the controller is used for controlling the opening and closing of the electromagnet (26), and adjacent electromagnets (26) are attracted to each other when powered on; the permanent magnet (27) is fixedly connected to the top of the lower tightening wheel (22) and the bottom of the shell (1), and adjacent permanent magnets (27) are attracted to each other; the attractive force generated by the electromagnet (26) when powered on is greater than the attractive force between the permanent magnets (27); When the device is powered on, the upper tightening wheel (21) and the meshing wheel (23) are located in different planes; when the device is powered off, the upper tightening wheel (21) and the meshing wheel (23) are located in the same plane, and the upper tightening wheel (21) is engaged with the meshing wheel (23).

6. The tourniquet with automatic fail-safe function according to claim 5, characterized in that, The tightening assembly comprises a tightening shaft (20) penetrating through the bottom wall of the shell (1) and in rotational cooperation with the bottom wall of the shell (1), the upper part and the lower part of the tightening shaft (20) are fixedly connected with the upper tightening wheel (21) and the tightening block (30) coaxially, respectively, the upper tightening wheel (21) is located in the shell (1), the tightening block (30) is located below the shell (1), and the lower part of the rotating column (5) is fixedly connected with the meshing wheel (23) coaxially; the two ends of the hemostatic air bag (10) are fixedly connected and communicated with the tightening air bag (31), and the end of the tightening air bag (31) away from the hemostatic air bag (10) is fixedly connected with the tightening block (30); The electromagnet (26) is fixedly connected to the bottom of the upper tightening wheel (21) and the inner bottom wall of the shell (1), the controller is used for controlling the opening and closing of the electromagnet (26), and adjacent electromagnets (26) are attracted to each other when powered on; the permanent magnet (27) is fixedly connected to the top of the lower tightening wheel (22) and the bottom of the shell (1), and adjacent permanent magnets (27) are attracted to each other; the attractive force generated by the electromagnet (26) when powered on is greater than the attractive force between the permanent magnets (27); When the device is powered on, the upper tightening wheel (21) and the meshing wheel (23) are located in different planes; when the device is powered off, the upper tightening wheel (21) and the meshing wheel (23) are located in the same plane, and the upper tightening wheel (21) is engaged with the meshing wheel (23).

7. The tourniquet with automatic fail-safe function according to claim 6, characterized in that, The tightening assembly comprises a tightening shaft (20) penetrating through the bottom wall of the shell (1) and in rotational cooperation with the bottom wall of the shell (1), the upper part and the lower part of the tightening shaft (20) are fixedly connected with the upper tightening wheel (21) and the lower tightening wheel (22) coaxially, respectively, the upper tightening wheel (21) is located in the shell (1), the lower tightening wheel (22) is located below the shell (1), and the lower part of the rotating column (5) is fixedly connected with the meshing wheel (23) coaxially; the bottom of the shell (1) is symmetrically and slidably fitted with the toothed plate (24), the toothed plate (24) is engaged with the lower tightening wheel (22), and the toothed plate (24) is fixedly connected with one end of the hemostatic air bag (10) adjacent thereto; The lower tightening wheel (22) is coaxially and rotatably connected with a tightening plate (33) at the top thereof, and the top of the tightening plate (33) and the bottom of the shell (1) are fixedly connected with electromagnets (26), and a controller is used for controlling the opening and closing of the electromagnets (26), and the adjacent electromagnets (26) repel each other when energized; the top of the tightening plate (33) is fixedly connected with a plurality of springs (32), and the ends of the springs (32) away from the tightening plate (33) are fixedly connected with the bottom of the shell (1), and the repulsion force generated by the electromagnets (26) when energized is greater than the traction force of the springs (32); When the device is energized, the upper tightening wheel (21) and the meshing wheel (23) are located in different planes; when the device is de-energized, the upper tightening wheel (21) and the meshing wheel (23) are located in the same plane, and the upper tightening wheel (21) is engaged with the meshing wheel (23).

8. The tourniquet with automatic fail-safe function according to claim 7, characterized in that, The emergency assembly includes a support rod fixedly connected to the inner top wall of the shell (1), and an elastic belt (18) fixedly connected to the support rod, and an emergency driving cylinder (19) fixedly connected to the upper part of the rotating column (5), and the end of the elastic belt (18) away from the support rod is fixedly connected to the outer side wall of the emergency driving cylinder (19).

9. The tourniquet with automatic fail-safe function according to claim 8, characterized in that, The top of the shell (1) is provided with a locking assembly for locking the hemostatic rod (28), and the locking assembly includes a "L"-shaped locking rod (29), and the top of the shell (1) is provided with a fixing hole and a plurality of locking holes, and one end of the locking rod (29) is detachably connected with the fixing hole, and the other end of the locking rod (29) is detachably connected with one of the locking holes.

10. The tourniquet with automatic fail-safe function according to claim 5 and claim 7, characterized in that, The side of the toothed plate (24) away from the hemostatic air bag (10) is fixedly connected with a limiting plate (25).

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