Mechanical external counterpulsation device and system thereof

Abstract

The mechanical external counterpulsation device is high in pressure control precision and small in size, the mechanical external counterpulsation device comprises a binding belt and a supporting plate arranged below the binding belt, a steel cable is fixed on the supporting plate and connected with a motor through a reversing mechanism, the reversing mechanism is higher than the highest position of the stroke of the supporting plate, and the reversing mechanism is connected with the motor. The motor rotates forwards to wind the steel cable to drive the supporting plate to extrude the binding belt upwards to reduce the restraining area or rotates backwards to release the steel cable to increase the restraining area of the binding belt. Compared with a traditional air bag inflation pressurization mode for controlling the extrusion force, the motor control precision is higher, response is more timely, and the external counterpulsation effect is ensured. Due to the arrangement of the reversing mechanism, the arrangement of all the mechanisms is more flexible, and the whole device is small in occupied area, light in weight and convenient to move and carry.

Description

Technical Field

[0001] The utility model relates to the technical field of external counterpulsation equipment, in particular to a mechanical external counterpulsation device and a system thereof. Background Art

[0002] EECP is a method of non-invasively pressing the lower body externally to relieve and eliminate angina symptoms and improve the hypoxic-ischemic state of important organs of the body. It is also a medical device used to prevent and treat cardiovascular and cerebrovascular diseases. Traditional EECP devices use air bags wrapped around the limbs and buttocks to inflate and pressurize the air bags during the diastole of the heart, prompting blood from the limb arteries and veins to return to the heart, significantly increasing diastolic pressure, improving blood perfusion of important organs such as the heart and brain, and reducing cardiac afterload; during the systole of the heart, the air bags are quickly deflated, the pressure is relieved, and the systolic pressure in the aorta is reduced, minimizing the resistance of the heart's ejection phase, and accelerating the blood flow to the distal end, thereby achieving the counterpulsation effect.

[0003] However, the traditional airbag inflation and pressurization method does not accurately control the extrusion force and has a slow speed response. Specifically, the airbag inflation and pressurization process is a gas compression transfer process, that is, the movement of gas in the gas path is a pressure equalization process under the condition of pressure difference. Compared with contact-type mechanical extrusion, this process has a slower response speed; at the same time, since the gas path pressure change is nonlinear, the control is more complicated. Utility Model Content

[0004] One purpose of the utility model is to provide a mechanical external counterpulsation device with high pressure control accuracy and small size.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a mechanical extracorporeal counterpulsation device, including a strap and a support plate arranged below the strap, a steel cable is fixed on the support plate, the steel cable is connected to the motor through a reversing mechanism, the reversing mechanism is higher than the highest point of the support plate stroke, the motor rotates forward to wind the steel cable to drive the support plate to squeeze the strap upward to reduce the area of ​​the constraint zone or reverse to release the steel cable to increase the area of ​​the constraint zone of the strap.

[0006] The support plate is located directly below the binding belt and is in the shape of an arc plate as a whole. The contour of the arc plate coincides with the bottom contour of the binding belt in its natural state. The length of the support plate is consistent with the length of the binding belt, and the arc length in the width direction is less than half of the outer circumference of the binding belt. The highest point of the support plate's travel is lower than the center line of the binding belt in its natural state. A fixing hole column for fixing the steel cable is provided on the lower plate surface of the support plate.

[0007] The arc length of the support plate in the width direction is 1 / 4 of the outer circumference of the binding belt.

[0008] A chassis is arranged below the support plate, and a notch is arranged on the upper part of the chassis for placing the binding belt and the support plate. The reversing mechanism is arranged inside the chassis and adjacent to the binding belt. One end of the steel cable is fixed in the fixed hole column, the middle section bypasses the reversing mechanism, and the other end is fixed on the rotating shaft of the motor. The motor rotates to wind or release the steel cable to adjust the position of the support plate in the vertical direction.

[0009] The reversing mechanism includes a support fixed on the chassis, a first fixed pulley is arranged on the support, a wheel core of the first fixed pulley is consistent with the length direction of the support plate, and the wheel groove and the hole core of the fixed hole column are located in the same vertical plane, a second fixed pulley and a third fixed pulley of equal height are arranged at the oblique upper position of the first fixed pulley, the wheel cores of the second fixed pulley and the third fixed pulley are parallel and arranged at an angle to the horizontal direction, a constraint cavity formed by the wheel grooves on the adjacent sides of the second fixed pulley and the third fixed pulley are located in the same vertical plane, and a fourth fixed pulley is also arranged on the side of the third fixed pulley, the wheel core of the fourth fixed pulley is located in the horizontal direction and is perpendicular to the wheel core of the first fixed pulley, after the steel cable enters the constraint cavity on the adjacent sides of the second fixed pulley and the third fixed pulley from the wheel groove of the first fixed pulley, and is connected to the motor after reversing by the fourth fixed pulley.

[0010] The wheel cores of the second fixed pulley and the third fixed pulley are parallel and the angle between them and the horizontal direction is 45 degrees. The top of the wheel groove of the fourth fixed pulley is arranged at the same height as the top of the wheel groove of the third fixed pulley.

[0011] The motor is fixed on the chassis, and the motor shaft passes through the chassis and protrudes into the chassis. The motor shaft is connected to a winding shaft, which is arranged just below the reversing mechanism. The winding shaft is provided with a through hole for the steel cable to pass through. One end of the steel cable is fixed on the winding shaft, and a retaining ring is also provided at the end of the winding shaft.

[0012] Fixed hole columns and steel cables are provided at the four corners of the lower plate surface of the pallet. The two fixed hole columns on the same side are arranged symmetrically with respect to the center of the pallet. The two fixed hole columns at the same end are located in the same vertical plane and share the same steel cable. Four groups of reversing mechanisms are also provided accordingly. The two steel cables on the same side are fixed to the winding shaft on the same motor, and the two groups of reversing mechanisms are arranged symmetrically with respect to the winding shaft.

[0013] The binding strap comprises an inner airbag and an outer binding strap, the binding strap is made of a non-compliant material, and the two sides of the binding strap are fixed on the top of the chassis and separated into an upper half and a lower half, wherein the upper half is provided with an opening and fixed with Velcro, and a notch is also provided at the corresponding position of the airbag and the Velcro.

[0014] Another object of the utility model is to provide a mechanical external counterpulsation system with high pressure control accuracy and small size.

[0015] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a mechanical external counterpulsation system, the airbag is connected to the air pump through a pipeline, the control system adjusts the pre-charge volume of the airbag according to the thickness of the patient's limbs, the pressure sensor collects the pressure of the airbag on the limbs and feeds it back to the control system, and the control system controls the motor to transmit push-up signal, hold signal and release signal to the motor in sequence within a cardiac pacing cycle.

[0016] In the above scheme, when in use, the limb is inserted into the restraint area of ​​the binding belt, and then the motor winds the steel cable, the support plate moves upward due to the pulling force, the binding belt is deformed due to the squeezing force, and the restraint area is reduced, thereby squeezing the limb, the motor releases the steel cable, the support plate moves downward, the squeezing force on the binding belt is removed, and the shape of the restraint area is restored, and the cycle repeats, sequentially squeezing the limb, thereby achieving the purpose of counterpulsation. Compared with the traditional method of controlling the squeezing force by inflating and pressurizing the airbag, the motor control accuracy is higher and the response is more timely, ensuring the effect of extracorporeal counterpulsation. Due to the setting of the reversing mechanism, the layout of each mechanism is more flexible, the entire device occupies a smaller area, is lighter in weight, and is easy to move and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a stereoscopic diagram of an external counterpulsation device;

[0018] Figure 2 for Figure 1 The structural diagram in which the chassis is removed;

[0019] Figure 3 for Figure 2 The schematic diagram of the structure in which the motor is removed;

[0020] Figure 4 for Figure 1 sectional view of;

[0021] Figure 5 , Figure 6 It is the overall diagram of the steering mechanism;

[0022] Figure 7 This is a schematic diagram of the structure of the fixed pulley block and steel cable inside the steering mechanism. DETAILED DESCRIPTION

[0023] Combine the following Figure 1-Figure 7 The utility model is further described in detail.

[0024] A mechanical external counterpulsation device includes a strap 10 and a support plate 20 arranged below the strap 10, a steel cable 30 is fixed to the support plate 20, and the steel cable 30 is connected to a motor 50 through a reversing mechanism 40. The reversing mechanism 40 is higher than the highest point of the travel of the support plate 20. The motor 50 rotates forward to wind the steel cable 30 and drive the support plate 20 to squeeze the strap 10 upward to reduce the area of ​​the restraint zone, or reverses to release the steel cable 30 to increase the area of ​​the restraint zone of the strap 10.

[0025] When in use, the limb is inserted into the restraint area of ​​the binding belt 10, and then the motor 50 winds the steel cable 30, the support plate 20 moves upward under the pulling force, the binding belt 10 is deformed by the squeezing force, the restraint area is reduced, thereby achieving the squeezing of the limb, the motor 50 releases the steel cable 30, the support plate 20 moves downward, the squeezing force on the binding belt 10 is removed, and the shape of the restraint area is restored, and the cycle is repeated to sequentially squeeze the limb, thereby achieving the purpose of counterpulsation.

[0026] Compared with the traditional airbag inflation and pressurization method to control the squeezing force, the motor control accuracy is higher and the response is more timely, ensuring the effect of external counterpulsation. In addition, the air pump, complex solenoid valve and connecting pipeline are eliminated, the entire system structure is simple and the working noise is low. Due to the setting of the reversing mechanism 40, the arrangement of each mechanism is more flexible, the entire device occupies a small area, and is easy to move and carry.

[0027] As a preferred solution of the utility model, the support plate 20 is located directly below the binding belt 10, and is in the shape of an arc plate as a whole. The contour of the arc plate is consistent with the bottom contour of the binding belt 10 in the natural state. The length of the support plate 20 is consistent with the length of the binding belt 10, and the arc length in the width direction is less than half of the outer circumference of the binding belt 10. The highest point of the travel of the support plate 20 is lower than the center line of the binding belt 10 in the natural state. A fixing hole column 21 for fixing the steel cable 30 is provided on the lower plate surface of the support plate 20. In other words, the length of the support plate 20 is substantially equal to the axial length of the binding belt 10, or slightly less than the axial length of the binding belt 10. In order to ensure that the support plate 20 can be subjected to the upward pulling force of the steel cable 30 throughout the entire travel from the lowest position to the highest position, the width of the arc plate should be reasonably designed and should be much less than half of the outer circumference of the binding belt 10.

[0028] Preferably, the arc length of the support plate 20 in the width direction is 1 / 4 of the outer circumference of the binding belt 10. When the arc length of the support plate 20 is 1 / 4 of the outer circumference of the binding belt 10, it can satisfy that the position of the support plate 20 in the entire stroke is lower than the reversing mechanism 40, and at the same time, the area of ​​the support plate 20 can be increased as much as possible, the contact area between the support plate 20 and the binding belt 10 is increased, and the binding belt 10 is squeezed more evenly.

[0029] A chassis 60 is disposed below the support plate 20, and a notch is disposed on the upper portion of the chassis 60 for placing the binding belt 10 and the support plate 20. The reversing mechanism 40 is disposed inside the chassis 60 and adjacent to the binding belt 10. The configuration of the chassis 60 can, on the one hand, prevent the influence of external impurities on the reversing mechanism 40, and on the other hand, reduce the noise generated by the reversing mechanism 40 during operation; Figure 2-Figure 4 As shown, the reversing mechanism 40 is arranged directly below the fixing point between the binding belt 10 and the chassis 60, and is adjacent to the outer surface of the binding belt 10, with a compact structure and reasonable spatial layout, which reduces the volume of the entire device. One end of the steel cable 30 is fixed in the fixing hole column 21, the middle section bypasses the reversing mechanism 40, and the other end is fixed on the rotating shaft of the motor 50. The motor 50 rotates to wind or release the steel cable 30 to adjust the position of the support plate 20 in the vertical direction.

[0030] As a preferred embodiment of the utility model, the reversing mechanism 40 includes a support 41 fixed on the chassis 60, a first fixed pulley 42 is arranged on the support 41, the wheel core of the first fixed pulley 42 is consistent with the length direction of the support plate 20, and the wheel groove and the hole core of the fixed hole column 21 are located in the same vertical plane, and the first fixed pulley 42 is provided with a second fixed pulley 43 and a third fixed pulley 44 of equal height at the upper oblique direction position, and the wheel cores of the second fixed pulley 43 and the third fixed pulley 44 are parallel and sandwiched with the horizontal direction. The second fixed pulley 43 and the third fixed pulley 44 are arranged in an angled manner, and the constraint cavity formed by the wheel grooves on the adjacent sides of the second fixed pulley 43 and the third fixed pulley 44 is located in the same vertical plane as the wheel groove of the first fixed pulley 42. A fourth fixed pulley 45 is also arranged beside the third fixed pulley 44, and the wheel core of the fourth fixed pulley 45 is located in the horizontal direction and is perpendicular to the wheel core of the first fixed pulley 42. After the steel cable 30 enters the constraint cavity on the adjacent sides of the second fixed pulley 43 and the third fixed pulley 44 from the wheel groove of the first fixed pulley 42, it is connected to the motor 50 after being changed by the fourth fixed pulley 45. In this embodiment, the steering structure of the fixed pulley group is adopted to convert the rotation force of the motor 50 into the upward pulling force of the steel cable 30 on the support plate 20. Of course, the implementation method is not limited to this, and a ball combination matching method (not shown in the figure) can also be adopted, which can also achieve the purpose of reducing the volume of the counterpulsation device while achieving the steering effect.

[0031] Preferably, the wheel cores of the second fixed pulley 43 and the third fixed pulley 44 are parallel and the angle between them and the horizontal direction is 45°, and the top of the wheel groove of the fourth fixed pulley 45 is set at the same height as the top of the wheel groove of the third fixed pulley 44, so as to ensure smooth transition and steering.

[0032] The motor 50 is fixed on the chassis 60, the motor shaft passes through the chassis 60 and protrudes into the chassis 10, the motor shaft is connected with a winding shaft 51, the winding shaft 51 is arranged directly below the reversing mechanism 40, a through hole 511 is provided on the winding shaft 51 for the steel cable 30 to pass through, one end of the steel cable 30 is fixed on the winding shaft 51, and a retaining ring 52 is also arranged at the end of the winding shaft 51. When the motor 50 drives the winding shaft 51 to rotate forward, the steel cable 30 is wound on the winding shaft 51, the length of the steel cable 30 becomes shorter, the support plate 20 is lifted upward, and then the binding belt 10 is squeezed; when the motor 50 drives the winding shaft 51 to rotate reversely, the steel cable 30 on the winding shaft 51 is released, the length of the steel cable 30 becomes longer, the support plate 20 is released downward, and the squeezing force on the binding belt 10 is removed. Here, the winding shaft 51 is arranged directly below the reversing mechanism 40, and all the mechanisms are arranged in an upper and lower position, thereby reducing the volume of the chassis 60 and further reducing the volume of the entire counterpulsation device.

[0033] In order to ensure the stability of the support plate 20 in the up and down directions, fixed hole columns 21 and steel cables 30 are provided at the four corners of the lower plate surface of the support plate 20, which support the support plate 20 from all sides respectively. The two fixed hole columns 21 on the same side are arranged symmetrically with respect to the center of the support plate 20, and the two fixed hole columns 21 at the same end are located in the same vertical plane and share the same steel cable 30. Four groups of reversing mechanisms 40 are also provided accordingly. The two steel cables on the same side are fixed to the winding shaft 51 on the same motor 50, and the two groups of reversing mechanisms 40 are arranged symmetrically with respect to the winding shaft 51. That is to say, a total of 4 fixed hole columns 21, 4 sets of reversing mechanisms 40 and two motors 50 are arranged. The steel cables 30 can be four separate ones or two (that is, two fixed hole columns 21 in the same section share one steel cable 30), and the two steel cables 30 on the same side are fixed to the winding shaft 51 of the same motor 50 after being reversing by their respective reversing mechanisms 40. At this time, the winding shaft 51 is located in the center position directly below the two reversing mechanisms 40 as a whole, ensuring that the winding shaft 51 is wound around the two steel cables 30 The amount is equal when it rotates, thereby ensuring that the pallet 20 is lifted smoothly and stably. It should be noted that the “two sets of reversing mechanisms 40 are symmetrically arranged relative to the winding shaft 51” here has two meanings. On the one hand, the winding shaft 51 is at the midline position of the two reversing mechanisms 40. On the other hand, the two sets of reversing mechanisms 40 are mirror-symmetrical, that is, the structures are the same, but the arrangement / arrangement directions of the pulleys are opposite. In this way, the two fourth fixed pulleys 45 are arranged adjacent to each other, and the steel cable 30 wound on the fourth fixed pulley 45 is at the closest state to the winding shaft 51, which can improve the utilization efficiency of the torque of the motor 50.

[0034] The binding belt 10 includes an inner air bag 11 and an outer bandage 12. The function of the binding belt 10 is to wrap around the patient's limbs. As the inner layer of the binding belt 10 directly acts on the patient's limbs, it uses a medical air bag 11, which can prevent long-term friction from causing abrasions to the skin of the patient's limbs, or reduce other unexpected situations that cause direct compression of the patient's limbs; in addition, by setting the medical air bag 11 with flexible characteristics, it also helps to make the pressure on the patient's legs uniform and improve the counterpulsation treatment effect; the bandage 12 is made of non-compliant material, has no elasticity, and can better restrain the limbs. The two sides of the bandage 12 are fixed on the top of the chassis 60 and are separated into an upper half and a lower half, wherein the upper half is provided with an opening and fixed with Velcro, and a notch a is also provided at the corresponding position of the air bag 11 and the Velcro. The setting of the notch a and the Velcro facilitates the insertion of the limbs into the restraint area. The lower half of the strap 12 is directly in contact with the support plate 20, and the upper half can ensure that when the airbag 11 is squeezed upward, the overall upward movement of the airbag 11 is restricted, thereby achieving the purpose of synchronously squeezing the airbag 11 from top to bottom, ensuring the uniformity of the squeezing force of the airbag 11 on the limbs.

[0035] A mechanical external counterpulsation system, wherein the airbag 11 is connected to an air pump through a pipeline, and the control system adjusts the pre-charge volume of the airbag 11 according to the thickness of the patient's limbs. The pressure sensor collects the pressure of the airbag 311 on the limbs and feeds it back to the control system. The control system controls the motor 50 to transmit a push signal, a hold signal and a release signal to the motor 50 in sequence within a cardiac pacing cycle.

[0036] When the ECG signal sensor detects the arrival of the R wave, the control system sends a winding signal to the controller of the motor 50, and the pressure sensor measures the pressure of the airbag 11 on the limbs in real time. When the pressure reaches the specified pressure value, the control system sends the holding signal to the controller of the motor 50. After the pressure is maintained for a certain period of time, the control system sends a release signal to the controller of the motor 50, and the external counterpulsation is realized in a cycle. It should be particularly noted that before counterpulsation, the pre-charge amount of the airbag 11 is adjusted according to the thickness of the patient's limbs to ensure that the initial pressure for different patients is consistent. The precise squeezing of the limbs can be achieved by setting the rising stroke of the support plate 20, and the real-time monitoring of the pressure sensor can be coordinated to further improve the counterpulsation effect.

[0037] from Figure 1 It can be seen that the volume of the counterpulsation device in the present invention is almost the same as that of the binding belt 10. Compared with other mechanical external counterpulsation devices, the volume and weight are greatly reduced.

[0038] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. In addition, the various different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of ​​the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A mechanical external counterpulsation device, comprising a binding belt (10) and a support plate (20) arranged below the binding belt (10), characterized in that: A steel cable (30) is fixed on the support plate (20), and the steel cable (30) is connected to the motor (50) via a reversing mechanism (40). The reversing mechanism (40) is arranged above the highest point of the travel of the support plate (20). The motor (50) rotates forward to wind up the steel cable (30) to drive the support plate (20) to press the binding belt (10) upward to reduce the area of ​​the restraining zone, or reverses to release the steel cable (30) to increase the area of ​​the restraining zone of the binding belt (10).

2. The mechanical external counterpulsation device according to claim 1, characterized in that: The support plate (20) is located directly below the binding belt (10) and is in the shape of an arc plate as a whole. The contour of the arc plate matches the bottom contour of the binding belt (10) in a natural state. The length of the support plate (20) is consistent with the length of the binding belt (10), and the arc length in the width direction is less than half of the outer circumference of the binding belt (10). The highest point of the travel of the support plate (20) is lower than the center line of the binding belt (10) in a natural state. A fixing hole column (21) for fixing the steel cable (30) is provided on the lower plate surface of the support plate (20).

3. The mechanical external counterpulsation device according to claim 2, characterized in that: The arc length of the support plate (20) in the width direction is 1 / 4 of the outer circumference of the binding belt (10).

4. The mechanical external counterpulsation device according to claim 2, characterized in that: A chassis (60) is arranged below the support plate (20), and a notch for placing the binding belt (10) and the support plate (20) is arranged on the upper part of the chassis (60). The reversing mechanism (40) is arranged inside the chassis (60) and adjacent to the binding belt (10). One end of the steel cable (30) is fixed in the fixing hole column (21), the middle section bypasses the reversing mechanism (40), and the other end is fixed on the rotating shaft of the motor (50). The motor (50) rotates to wind or release the steel cable (30) to adjust the position of the support plate (20) in the vertical direction.

5. The mechanical external counterpulsation device according to claim 4, characterized in that: The reversing mechanism (40) comprises a support (41) fixed on the chassis (60), a first fixed pulley (42) being arranged on the support (41), a wheel core of the first fixed pulley (42) being consistent with the length direction of the support plate (20), and a wheel groove and a hole core of the fixed hole column (21) being located in the same vertical plane, a second fixed pulley (43) and a third fixed pulley (44) being arranged at the same height in the oblique upper direction of the first fixed pulley (42), the wheel cores of the second fixed pulley (43) and the third fixed pulley (44) being parallel and arranged at an angle to the horizontal direction, and the second fixed pulley (43) and the third fixed pulley (44) being arranged at the same height in the oblique upper direction of the first fixed pulley (42). The constraint cavity formed by the wheel grooves on the adjacent sides of the pulley (43) and the third fixed pulley (44) is located in the same vertical plane as the wheel groove of the first fixed pulley (42). A fourth fixed pulley (45) is further arranged beside the third fixed pulley (44). The wheel core of the fourth fixed pulley (45) is located in the horizontal direction and is perpendicular to the wheel core of the first fixed pulley (42). The steel cable (30) enters the constraint cavity on the adjacent sides of the second fixed pulley (43) and the third fixed pulley (44) from the wheel groove of the first fixed pulley (42), and then is connected to the motor (50) after being reversed by the fourth fixed pulley (45).

6. The mechanical external counterpulsation device according to claim 5, characterized in that: The wheel cores of the second fixed pulley (43) and the third fixed pulley (44) are parallel and the angle between them and the horizontal direction is 45 degrees, and the top of the wheel groove of the fourth fixed pulley (45) is arranged at the same height as the top of the wheel groove of the third fixed pulley (44).

7. The mechanical external counterpulsation device according to claim 4, characterized in that: The motor (50) is fixed on the chassis (60), the motor shaft passes through the chassis (60) and protrudes into the chassis (60), the motor shaft is connected to a winding shaft (51), the winding shaft (51) is arranged directly below the reversing mechanism (40), the winding shaft (51) is provided with a through hole (511) for the steel cable (30) to pass through, one end of the steel cable (30) is fixed on the winding shaft (51), and a retaining ring (52) is further provided at the end of the winding shaft (51).

8. The mechanical external counterpulsation device according to claim 4, characterized in that: Four corners of the lower plate surface of the support plate (20) are provided with fixing hole columns (21) and steel cables (30); two fixing hole columns (21) on the same side are symmetrically arranged relative to the center of the support plate (20); two fixing hole columns (21) at the same end are located in the same vertical plane and share the same steel cable (30); four groups of reversing mechanisms (40) are also provided accordingly; two steel cables on the same side are fixed to a winding shaft (51) on the same motor (50); and two groups of reversing mechanisms (40) are symmetrically arranged relative to the winding shaft (51).

9. The mechanical external counterpulsation device according to claim 1, characterized in that: The binding belt (10) comprises an inner airbag (11) and an outer binding belt (12), wherein the binding belt (12) is made of a non-compliant material, and the two sides of the binding belt (12) are fixed to the top of the chassis (60) to be separated into an upper half and a lower half, wherein the upper half is provided with an opening and is fixed with Velcro, and a notch (a) is also provided at a position corresponding to the airbag (11) and the Velcro.

10. A mechanical external counterpulsation system, comprising the mechanical external counterpulsation device according to any one of claims 1 to 9, characterized in that: The airbag (11) is connected to the air pump via a pipeline, the control system adjusts the pre-filling amount of the airbag (11) according to the thickness of the patient's limbs, the pressure sensor collects the pressure of the airbag (311) on the limbs and feeds it back to the control system, and the control system controls the motor (50) to transmit a push-up signal, a hold signal, and a release signal to the motor (50) in sequence within a cardiac pacing cycle.

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