Hand-cranking driving device and ECMO device

Abstract

The utility model discloses a hand-cranking driving device and an ECMO device, the hand-cranking driving device comprises a first transmission assembly, a second transmission assembly and a hand-cranking assembly which are connected in sequence, the second transmission assembly is used for transmitting torque input by the hand-cranking assembly to the first transmission assembly, and the first transmission assembly is used for transmitting torque input by the hand-cranking assembly to the second transmission assembly. The first transmission assembly is used for bearing the blood pump and driving the blood pump to operate; and the digital display assembly is used for detecting and displaying the rotating speed output by the hand-cranking driving device. The hand-cranking driving device provided by the embodiment of the utility model does not need power dependence, and is simple and compact in structure, portable, light and convenient to maintain; meanwhile, the hand-cranking driving device is provided with a digital display assembly, the real-time rotating speed can be visually displayed and corresponds to the corresponding blood flow speed, an operator can directly adjust the driving rotating speed according to the displayed rotating speed, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of medical devices for extracorporeal life support, and particularly to a hand-driven device. Background Art

[0002] Extracorporeal Membrane Oxygenation (ECMO) is a device that continuously provides extracorporeal respiration and blood oxygen circulation for patients to maintain their lives. The core parts of ECMO are the oxygenator (artificial lung) and the blood pump (artificial heart), which can provide long-term cardiopulmonary support for patients with severe cardiopulmonary failure and win precious time for the rescue of critically ill patients. The oxygenator and the blood pump often need to operate under the drive of a driving mechanism. However, in certain situations, a manual driving device may be required to provide driving force to the blood pump. For example, when the ECMO device fails (such as the failure of the electric pump, power interruption, etc.) or during the waiting period for repair and replacement, the manual driving device can be used as a temporary emergency device to ensure the continuous circulation of blood. During some surgical procedures, especially in cases involving cardiac surgery and already connected to ECMO, unexpected situations may occur where the electric pump needs to be temporarily stopped (such as avoiding electromagnetic interference during electro-surgery); in medical education and training of medical staff, the hand-crank driving device can be used to simulate a simple model of the ECMO system; when a patient needs to be transferred from one medical institution to another, especially during the transfer without continuous power supply (such as in a helicopter, ambulance), the hand-crank driving device can be used as an alternative driving method, etc. Summary of the Utility Model

[0003] The technical problem to be solved by the embodiments of the utility model is to provide a hand-crank driving device and an ECMO device, which can output driving force to the blood pump in the absence of power supply and can display the input or output rotational speed in real time.

[0004] To solve the above technical problem, the utility model provides a hand-crank driving device, which includes: a first transmission component, a second transmission component, and a hand-crank component connected in sequence, wherein the second transmission component is used to transmit the torque input by the hand-crank component to the first transmission component, and the first transmission component is used to carry the blood pump and drive the blood pump to operate; and a digital display component is further included, which is used to detect and display the rotational speed output by the hand-crank driving device.

[0005] In a feasible implementation manner, the first transmission component is connected to the hand-crank component in a one-way transmission manner.

[0006] In a feasible implementation manner, the second transmission assembly is connected to the hand-crank assembly through a one-way transmission assembly. The one-way transmission assembly includes a driving gear and a one-way gearbox. The driving gear is fixedly connected to the hand-crank assembly. The driving gear is disposed inside the one-way gearbox, and the one-way gearbox rotates unidirectionally under the drive of the driving gear.

[0007] In a feasible implementation manner, the first transmission assembly includes a driving turntable, a first fixing member, and a first housing. Among them, the first fixing member is disposed above the first housing, and the first fixing member is used for carrying and fixing the blood pump. A chamber is formed between the first housing and the first fixing member. The driving turntable is disposed inside the chamber below the first fixing member, and the driving turntable is used for driving the blood pump to operate.

[0008] In a feasible implementation manner, the first transmission assembly further includes a first connecting shaft, and the first connecting shaft coaxially connects the driving turntable and the second transmission assembly.

[0009] In a feasible implementation manner, the driving turntable is in non-contact connection with the rotor assembly, and the non-contact connection is magnetic coupling or electromagnetic coupling. The rotor assembly has a magnetic body, and the driving turntable is provided with a magnetic body corresponding to the magnetic body of the rotor assembly. The magnetic body of the driving turntable and the magnetic body of the rotor assembly generate magnetic coupling.

[0010] In a feasible implementation manner, the first transmission assembly further includes a limiting member. A limiting hole is provided on the first fixing member, and the limiting member passes through the limiting hole and is connected to the first fixing member. One end of the limiting member abuts against the blood pump.

[0011] In a feasible implementation manner, the second transmission assembly includes a transmission shaft. One end of the transmission shaft is connected to the hand-crank assembly, and the other end is connected to the driving turntable of the first transmission assembly.

[0012] In a feasible implementation manner, the digital display assembly includes a rotational speed sensor and an electronic display screen. The output end of the rotational speed sensor is connected to the electronic display screen.

[0013] Correspondingly, the present utility model further provides an ECMO device, including the hand-crank driving device described in any one of the above and a blood pump. The blood pump is detachably connected to the first transmission assembly.

[0014] Implementing the present utility model has the following beneficial effects:

[0015] The hand-cranked driving device provided by the embodiments of the present application does not rely on electricity. It drives the internal mechanical structure to work through the hand-cranking component without the need for an external power supply. Moreover, the hand-cranked driving device has a simple and compact structure, is portable and lightweight, and is also easy to maintain. At the same time, the hand-cranked driving device is equipped with a digital display component that can intuitively display the real-time rotation speed. The operator can directly adjust the driving speed according to the displayed rotation speed, and the usage method is easy to master.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application and do not constitute an improper limitation to the present application.

[0018] Figure 1 is an exemplary three-dimensional structural schematic diagram of a hand-cranked driving device and a blood pump shown in some embodiments of the present application;

[0019] Figure 2 is Figure 1 an exploded view of;

[0020] Figure 3 is Figure 1 a side view of;

[0021] Figure 4 is Figure 3 a cross-sectional view taken along A-A.

[0022] Reference numerals in the drawings: 100 - hand-cranked driving device; 110 - first transmission component, 111 - driving turntable, 112 - first fixing member, 113 - first housing, 1131 - limiting hole, 1132 - notch, 114 - first connecting shaft, 115 - magnetic body, 116 - limiting member, 120 - second transmission component, 121 - transmission shaft, 122 - second connecting shaft, 123 - coupling, 130 - hand-cranking component, 131 - handle, 132 - hand-cranking shaft, 140 - digital display component, 141 - rotation speed sensor, 142 - electronic display screen, 143 - synchronous belt, 150 - one-way transmission component, 151 - driving gear, 152 - one-way gearbox, 160 - second housing, 161 - window;

[0023] 200 - blood pump, 210 - rotor assembly, 220 - blood output pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following describes the specific embodiments of the present utility model in detail with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present utility model, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood not to include the present number, and above, below, within, etc. are understood to include the present number. If the first and second are described only for the purpose of distinguishing technical features, they cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0027] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0028] In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0029] The embodiment of the present application provides a hand-crank driving device 100. Please refer to Figures 1 to 4。The hand-crank drive device 100 is used to provide power to the blood pump 200 of the ECMO. The hand-crank drive device 100 includes: a first transmission assembly 110, a second transmission assembly 120, a hand-crank assembly 130, and a digital display assembly 140. Among them, the first transmission assembly 110, the second transmission assembly 120, and the hand-crank assembly 130 are connected in sequence. The second transmission assembly 120 is used to transmit the torque input by the hand-crank assembly 130 to the first transmission assembly 110. The first transmission assembly 110 is used to carry the blood pump 200 and drive the blood pump 200 to operate. The digital display assembly 140 is used to detect and display the rotational speed output by the hand-crank drive device 100.

[0030] The hand-crank drive device 100 provided by the embodiment of the present application does not rely on electricity. It drives the internal mechanical structure to work through the hand-crank assembly 130 without external power supply. The hand-crank drive device 100 does not consume electric energy or fuel, and the operating cost is almost zero. Portable and lightweight: The hand-crank drive device 100 is designed compactly with a moderate weight, making it easy to carry and move. Simple operation: The hand-crank drive device 100 has a digital display assembly 140, which can intuitively display the real-time rotational speed and the corresponding blood flow rate. The operator can directly adjust the driving speed according to the displayed rotational speed. The usage method is easy to master without complex technical training, and even non-professionals can quickly get started, ensuring that blood circulation can be delivered quickly and effectively when needed. The structure of the hand-crank drive device 100 is relatively simple with fewer components, and its maintenance work is easy. Common inspections, cleaning, lubrication, etc. can often be completed by the user himself, reducing the dependence on professional maintenance services and extending the service life of the equipment at the same time. Since it does not involve electric operation, the hand-crank drive device 100 eliminates the risk of electric shock and is safer during use.

[0031] In a feasible implementation manner, the first transmission assembly 110, the second transmission assembly 120, and the hand-crank assembly 130 can be connected by gear transmission and / or coupling transmission. Gear transmission has the advantages of large power transmission, high efficiency, constant ratio transmission, and compact structure; coupling transmission has the advantages of simple structure, convenient installation, and high reliability. Through such a connection method, the driving force of the rotation input on the hand-crank assembly 130 can be stably and reliably transmitted to the first transmission assembly 110 and output the driving force to the blood pump 200 to drive the blood pump 200 to operate.

[0032] In a feasible implementation manner, the first transmission component 110 is unidirectionally connected to the hand-cranked component 130. For example, the first transmission component 110 may be unidirectionally connected to the second transmission component 120. Another example is that the second transmission component 120 may be unidirectionally connected to the hand-cranked component 130. It may also be that both the connection between the first transmission component 110 and the second transmission component 120 and the connection between the second transmission component 120 and the hand-cranked component 130 are unidirectional. As long as the unidirectional connection between the first transmission component 110 and the hand-cranked component 130 can be achieved. The unidirectional connection can avoid reverse driving and the adverse effects caused by misoperation.

[0033] In a feasible implementation manner, the second transmission component 120 is unidirectionally connected to the hand-cranked component 130. The unidirectional connection between the second transmission component 120 and the hand-cranked component 130 makes the driving force transmitted by the second transmission component 120 to the first transmission component 110 also unidirectional. Consequently, the driving force output to the blood pump 200 is also unidirectional rotation. The unidirectional connection can avoid reverse driving and the adverse effects caused by misoperation.

[0034] In a feasible implementation manner, the second transmission component 120 and the hand-cranked component 130 are connected through a unidirectional transmission component 150. The unidirectional transmission component 150 includes a driving gear 151 and a one-way gearbox 152. The driving gear 151 is fixedly connected to the hand-cranked component 130, the one-way gearbox 152 is connected to the second transmission component 120, the driving gear 151 is disposed inside the one-way gearbox 152, and the one-way gearbox 152 rotates unidirectionally under the drive of the driving gear 151.

[0035] In a feasible implementation manner, the first transmission component 110 includes a driving turntable 111, a first fixing member 112, a first housing 113, and a first connecting shaft 114. Among them, the first fixing member 112 is disposed above the first housing 113, and the first fixing member 112 is used to carry and fix the blood pump 200. A chamber is formed between the first housing 113 and the first fixing member 112, and the driving turntable 111 is disposed in the chamber below the first fixing member 112. The first connecting shaft 114 coaxially connects the driving turntable 111 and the second transmission component 120. The driving turntable 111 is used to drive the rotor assembly 210 of the blood pump 200 to rotate, and the driving turntable 111 is coaxially connected to the rotor assembly 210.

[0036] In a feasible implementation, the driving turntable 111 is non - contact connected to the rotor assembly 210, and the non - contact connection is magnetic coupling or electromagnetic coupling. The rotor assembly 210 has a magnetic body. The driving turntable 111 is provided with a magnetic body 115 corresponding to the magnetic body of the rotor assembly 210. The magnetic body 115 of the driving turntable 111 and the magnetic body of the driving part generate magnetic coupling. Magnetic coupling or electromagnetic coupling is non - contact, which can provide excellent electrical isolation, greatly improve the safety of the system, and effectively avoid the risk of short - circuit and the harm of electric sparks. Secondly, no physical contact means no wear and no frictional loss, so higher efficiency can be achieved in energy transmission and mechanical drive, with low maintenance cost and relatively long service life. Thirdly, magnetic coupling can achieve an effective transmission distance from a few centimeters to several meters and is not restricted by the requirement of shaft alignment. For the situation of relative movement or radial displacement between different axes, it can adapt to different specifications of the blood pump 200, so that the hand - crank driving device 100 can be adapted to a variety of specifications of the blood pump 200. Finally, magnetic coupling can avoid pollution and damage caused by direct contact, protect sensitive electronic components from external factors, and also avoid cross - contamination. It should be noted that the rotor assembly 210 of the blood pump 200 has a magnetic body and the driving turntable 111 also has a magnetic body 115, and the two are magnetic coupling or electromagnetic coupling, which is prior art and its function is to drive the rotation of the rotor assembly 210 through non - contact connection, so it will not be elaborated here.

[0037] In a feasible implementation, the first transmission assembly 110 further includes a limiting member 116. A limiting hole 1131 is provided on the first housing 113. The limiting member 116 passes through the limiting hole 1131 and is connected to the first housing 113. One end of the limiting member 116 abuts against the blood pump 200. Further, the limiting member 116 can be a knob plunger. The knob plunger can ensure the firm and reliable connection between components through the fastening function of the knob and will not loosen easily. Secondly, the operation mode of the knob plunger is relatively simple. Only by manually rotating the knob can the insertion, extraction and fastening of the plunger be completed. Compared with other complex fastening methods, it is easier to perform quick installation and disassembly, and the distance can also be adjusted according to different blood pumps 200, so that the hand - crank driving device 100 is applicable to different specifications of the blood pump 200. At the same time, the knob plunger has a simple and compact structure, which can also simplify the structure of the hand - crank driving device 100 and is convenient for daily maintenance.

[0038] In a feasible implementation, the first housing 113 has a notch 1132, and the blood pump 200 has a blood output tube 220. The blood output tube 220 passes out through the notch 1132. This can adapt to the structure of the blood pump 200, better ensure the connection stability between the blood pump 200 and the hand - crank driving device 100, and can also play a certain limiting role on the blood pump 200.

[0039] In a feasible implementation, the second transmission assembly 120 includes a transmission shaft 121. One end of the transmission shaft 121 is connected to the hand-cranking assembly 130, and the other end is connected to the driving turntable 111 of the first transmission assembly 110. In this way, the transmission strength of the second transmission assembly 120 can be ensured, and further the structural stability of the hand-cranking driving device 100 can be ensured.

[0040] Furthermore, the length of the transmission shaft 121 is (). In this way, not only the best transmission strength can be achieved, but also the structure of the hand-cranking driving device 100 can be made compact and convenient for holding.

[0041] In a feasible implementation, one end of the transmission shaft 121 is connected to the input end of the driving turntable 111 of the first transmission assembly 110 through a coupling 123. The other end of the transmission shaft 121 is connected to the one-way gearbox 152 of the one-way transmission assembly 150 through a second connecting shaft 122. Furthermore, the end of the second connecting shaft 122 connected to the one-way gearbox 152 can also have a gear structure. In this way, the one-way transmission function can also be achieved.

[0042] In a feasible implementation,

[0043] In a feasible implementation, the digital display assembly 140 includes a rotational speed sensor 141 and an electronic display screen 142. The detection end of the rotational speed sensor 141 is connected to the output end (transmission shaft 121) of the second transmission assembly 120 through a synchronous belt 143. The rotational speed output by the output end of the second transmission assembly 120 is also the rotational speed output by the hand-cranking driving device. The output end of the rotational speed sensor 141 is connected to the electronic display screen 142. The synchronous belt 143 transmission can accurately transmit power. Since its meshing method is similar to gear transmission, the transmission ratio is constant and there is no slipping. Therefore, when the rotational speed sensor 141 is connected to the second transmission assembly 120 through the synchronous belt 143, the sensor can very accurately monitor the real-time rotational speed output by the hand-cranking driving device; the stable transmission characteristics of the synchronous belt 143 make the data collected by the sensor more reliable and will not cause signal distortion or inaccurate reading due to the slipping phenomenon of the belt transmission; at the same time, the synchronous belt 143 transmission has good vibration damping performance, can absorb part of the vibration from the transmission assembly, and also helps to simplify the configuration of the entire transmission system.

[0044] In a feasible implementation, the digital display assembly 140 further includes a power driving device, and the power driving device is used to supply power to the digital display assembly 140.

[0045] In a feasible implementation, the rotational speed sensor 141 includes a generator for supplying power to the rotational speed sensor 141 and the electronic display screen 142. Specifically, the hand-cranking assembly 130 drives the second transmission assembly 120 to drive the generator to generate direct current for supplying power to the rotational speed sensor 141 and the electronic display screen 142. In this way, it can operate without an external power supply, saving energy consumption and simplifying the structure. It also makes the overall volume of the hand-cranking driving device 100 smaller and lighter, facilitating portability and storage. At the same time, such a passive rotational speed sensor 141 is also less susceptible to electromagnetic interference, and the detection result is accurate.

[0046] The hand-cranking driving device 100 further includes a second housing 160. The second housing 160 has a hollow structure, and the one-way transmission assembly 150 and the first transmission assembly 110 are disposed inside the second housing 160. The digital display assembly 140 is fixed to the second housing 160 assembly. A window 161 is provided on the second housing 160, and the display screen of the digital display assembly 140 is displayed outside the second housing 160 through the window 161, and the remaining components of the digital display assembly 140 are accommodated inside the second housing 160. Further, the second housing 160 can also be used for holding. When an operator holds the handle 131 of the hand-cranking assembly 130 with one hand, the other hand can hold the second housing 160. In this way, it is convenient for the operator to apply a driving force to the hand-cranking driving device 100.

[0047] In a feasible implementation, the hand-cranking assembly 130 includes a handle 131 and a hand-cranking shaft 132 connected to the handle 131. The handle 131 is provided with an ergonomic gripping portion. The hand-cranking shaft 132 is connected to a gear transmission mechanism for converting the rotational movement of the handle 131 into a high torque output to the second transmission assembly 120. In a feasible implementation manner, the gear transmission mechanism is a one-way transmission assembly 150. One end of the driving gear 151 is connected to the one-way gearbox 152, and the other end is connected to the hand-cranking shaft 132. In this way, the best transmission strength can be achieved, the structure of the hand-cranking driving device 100 can be made compact, and it is also convenient for the operator to apply a driving force.

[0048] In a feasible implementation, the handle 131 is provided with anti-slip patterns or covered with anti-slip materials to increase the holding stability. Further, an anti-slip sleeve is sleeved on the handle 131. The anti-slip sleeve is made of wear-resistant rubber material, with anti-slip patterns on its surface, and the shape of the sleeve body fits the handle 131 to ensure comfortable and stable holding. The anti-slip sleeve is usually made of materials such as rubber and silica gel with a relatively high coefficient of friction, and the surface can also be provided with textures or concave-convex structures, which can increase the friction between the hand and the handle 131, prevent the hand from slipping during operation, and effectively ensure the user's stable holding of the handle 131, avoiding slipping due to a slippery hand. The anti-slip sleeve can also provide a soft and buffered contact surface, reducing the pressure and discomfort caused by the direct contact between the hand and the hard handle 131. Especially in the case of requiring strong hand cranking or long-term continuous operation, it can reduce hand fatigue and improve the user's operation experience. In addition, the anti-slip sleeve can be customized with a suitable thickness and shape to adapt to the palm sizes and holding habits of different people, further enhancing the holding comfort. The anti-slip sleeve can also play a role in protecting the surface of the handle 131, preventing surface damage of the handle 131 caused by long-term use, wear or chemical erosion, and extending the service life of the handle 131. The anti-slip sleeve can be designed in various colors, patterns or printed with brand logos, which can not only beautify the appearance of the handle 131, improve the overall visual effect of the device, but also enhance the brand recognition, which is beneficial to the product market promotion and user recognition.

[0049] Correspondingly, an ECMO device is provided in an embodiment of the present application. The ECMO device includes the aforementioned hand-crank drive device and a blood pump, and the blood pump is detachably connected to the first transmission component of the hand-crank drive device.

[0050] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0051] The above-described embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A hand-cranked drive device, characterized in that: The hand-cranked drive device comprises: a first transmission assembly, a second transmission assembly and a hand-cranked assembly connected in sequence, wherein: The second transmission assembly is used to transmit the torque input by the hand crank assembly to the first transmission assembly. The first transmission assembly is used to carry the blood pump and drive the blood pump to operate; It also includes a digital display component for detecting and displaying the rotation speed output by the hand-cranked drive device; The first transmission assembly is connected to the hand crank assembly in a one-way transmission manner; The second transmission assembly is connected to the hand-crank assembly through a one-way transmission assembly, the one-way transmission assembly includes a driving gear and a one-way gear box, the driving gear is fixedly connected to the hand-crank assembly, the driving gear is arranged in the one-way gear box, and the one-way gear box rotates in one direction under the drive of the driving gear; the first transmission assembly includes a driving turntable, a first fixing member and a first housing; wherein, The first fixing member is disposed above the first housing, and the first fixing member is used to carry and fix the blood pump; A chamber is formed between the first housing and the first fixing member, and the driving turntable is arranged in the chamber below the first fixing member. The driving turntable is used to drive the rotor assembly of the blood pump to rotate; The first transmission assembly further comprises a first connecting shaft, and the first connecting shaft coaxially connects the driving turntable with the second transmission assembly; The driving turntable is non-contactly connected to the rotor assembly, and the non-contact connection is magnetic coupling or electromagnetic coupling; The rotor assembly has a magnetic body, and the driving turntable is provided with a magnetic body corresponding to the magnetic body of the rotor assembly, and the magnetic body of the driving turntable and the magnetic body of the rotor assembly generate magnetic coupling; the first transmission assembly also includes a limit member, and the first fixing member is provided with a limit hole, the limit member passes through the limit hole and is connected to the first fixing member, and one end of the limit member abuts against the blood pump.

2. The hand-cranked drive device according to claim 1, characterized in that: The second transmission assembly includes a transmission shaft, one end of which is connected to the hand-crank assembly, and the other end of which is connected to the driving turntable of the first transmission assembly.

3. The hand-cranked driving device according to claim 1, characterized in that: The digital display assembly includes a rotation speed sensor and an electronic display screen, and the output end of the rotation speed sensor is connected to the electronic display screen.

4. An ECMO device, characterized in that: It comprises a hand-cranked drive device as described in any one of claims 1 to 3 and a blood pump, wherein the blood pump is detachably connected to the first transmission assembly.

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