Motor-driven external counterpulsation device and system thereof

Abstract

The motor-driven external counterpulsation device and the motor-driven external counterpulsation system are timely in response and high in pressure control precision, the motor-driven external counterpulsation device comprises a binding belt and a supporting plate arranged below the binding belt, and a lifting mechanism drives the supporting plate to move up and down to extrude the binding belt so as to reduce the area of a constraint area or release the binding belt so as to increase the area of the constraint area. The lifting mechanism comprises two motors arranged on the two sides of the supporting plate respectively, motor shafts of the motors are arranged in the vertical direction, the motors are connected with the supporting plate through a conversion assembly, and the conversion assembly converts rotary motion of the motors into linear motion of the supporting plate in the vertical direction. 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.

Description

Technical Field

[0001] The utility model relates to the technical field of external counterpulsation equipment, in particular to a motor-driven 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 motor-driven external counterpulsation device with timely response and high pressure control accuracy.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a motor-driven extracorporeal counterpulsation device, including a binding belt and a support plate arranged below the binding belt, a lifting mechanism drives the support plate to move up and down to squeeze the binding belt to reduce the area of ​​the constraint zone or release the binding belt to increase the area of ​​the constraint zone, the lifting mechanism includes two motors arranged on both sides of the support plate, the motor shaft of the motor is arranged in the vertical direction, the motor is connected to the support plate through a conversion assembly, and the conversion assembly converts the rotational motion of the motor into linear motion of the support plate in the vertical direction.

[0006] The lifting mechanism is arranged in a chassis, and a notch is opened in the middle of the chassis for placing the binding belt and the support plate. The support plate is made of hard material and is in the shape of a U-shaped groove plate with an opening upward. The groove length is parallel to the axial direction of the binding belt. A flange is provided at the notch of the U-shaped groove, and the plate surface of the flange is arranged in the horizontal direction. The motors on both sides synchronously drive the two flanges to move linearly in the vertical direction.

[0007] The conversion assembly includes a ball screw, the lower end of the ball screw is axially limited and circumferentially rotated with the motor shaft and the upper end with the top of the chassis through a coupling, a ball nut is fixed on the flange, and the ball screw passes through the ball nut to form a transmission pair. The motor drives the ball screw to rotate, driving the ball nut and the support plate to move linearly in the vertical direction.

[0008] A guide column is also provided in the chassis. The guide column is arranged in the vertical direction. The lower end of the guide column is fixed to the bottom of the chassis, and the upper end is fixed to the top of the chassis. The guide hole opened on the flange through which the guide column passes constitutes a guide fit.

[0009] The motor is located in the middle of the chassis, and one guide column is arranged at each of the four corners of the support plate.

[0010] A guide sleeve is fixed to the bottom of the flange, the hole core of the guide sleeve coincides with the hole core of the guide hole, and a guide column is placed in the guide sleeve to form a guide fit. A position sensor is provided on one of the guide columns, and the position sensor collects the position information of the pallet and feeds it back to the control unit.

[0011] 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.

[0012] The support plate is provided with a plurality of hollow parts at intervals in the length direction thereof, and the flange is also provided with hollow parts.

[0013] The outer surface of the chassis is evenly and densely covered with heat dissipation holes.

[0014] Another object of the utility model is to provide a motor-driven external counterpulsation system with timely response and high pressure control accuracy.

[0015] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a motor-driven 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 lifting mechanism drives the support plate to move upward. The binding belt is deformed by the upward squeezing force, and the restraint area is reduced, thereby squeezing the limb. The driving mechanism drives the support plate to move downward, the squeezing force on the binding belt is removed, and the shape of the restraint area is restored. This 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 has higher precision and more timely response, ensuring the effect of external counterpulsation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the external counterpulsation device;

[0018] Figure 2 , Figure 3 for Figure 1 A cross-sectional view of

[0019] Figure 4 It is a schematic diagram of the internal structure of the external counterpulsation device;

[0020] Figure 5 It is a schematic diagram of the structure of the pallet. DETAILED DESCRIPTION

[0021] Combine the following Figure 1-Figure 5 The utility model is further discussed in detail.

[0022] A motor-driven external counterpulsation device includes a binding belt 10 and a support plate 20 arranged below the binding belt 10. A lifting mechanism 30 drives the support plate 20 to move up and down to squeeze the binding belt 10 to reduce the area of ​​the restraint zone or release the binding belt 10 to increase the area of ​​the restraint zone. The lifting mechanism 30 includes two motors 31 arranged on both sides of the support plate 20. The motor shaft 311 of the motor 31 is arranged in the vertical direction. The motor 31 is connected to the support plate 20 through a conversion component 32. The conversion component 32 converts the rotational motion of the motor 31 into linear motion of the support plate 20 in the vertical direction.

[0023] When in use, the limb is inserted into the restraint area of ​​the strap 10, and then the lifting mechanism 30 drives the support plate 20 to move upward. The strap 10 is deformed by the upward squeezing force, and the restraint area is reduced, thereby squeezing the limb. The lifting mechanism 30 drives the support plate 20 to move downward, the squeezing force on the strap 10 is removed, and the shape of the restraint area is restored. This cycle is repeated to sequentially squeeze the limb, thereby achieving the purpose of counterpulsation.

[0024] Compared with the traditional method of controlling the squeezing force by inflating and pressurizing the airbag, the motor control has higher precision and more timely response, ensuring the effect of extracorporeal counterpulsation. In addition, the air pump, complex solenoid valve and connecting pipelines are eliminated, the entire system structure is simple and the working noise is low. The lifting mechanism 30 is located below the support plate 20, and the entire device occupies a small area; the two motors 31 of the lifting mechanism 30 apply force to the support plate 20 synchronously on both sides of the support plate 20, so that the movement of the support plate 20 is more stable and the counterpulsation effect is good.

[0025] In order to prevent external impurities from affecting the precise movement of the lifting mechanism 30, the lifting mechanism 30 is arranged in a chassis 40. A notch is provided in the middle of the chassis 40 for placing the binding belt 10 and the support plate 20. The entire device is small in size and easy to move. The support plate 20 is made of a hard material and is in the shape of a U-shaped groove plate with an opening facing upward. The length of the groove is parallel to the axial direction of the binding belt 10. A flange 21 is provided at the notch of the U-shaped groove. The plate surface of the flange 21 is arranged in the horizontal direction. The motors 31 on both sides synchronously drive the two flanges 21 to move linearly in the vertical direction. The chassis 40 can support the limbs, and at the same time, the chassis 40 can also reduce the noise problem caused by the operation of the device.

[0026] As a preferred embodiment of the present utility model, the conversion assembly 32 includes a ball screw 321, the lower end of the ball screw 321 is axially limited and circumferentially rotated with the motor shaft 311 through a coupling 322, and the upper end is connected to the top of the chassis 40, a ball nut 323 is fixed on the flange 21, and the ball screw 321 passes through the ball nut 323 to form a transmission pair, and the motor 31 drives the ball screw 321 to rotate, driving the ball nut 323 and the support plate 20 to move linearly in the vertical direction. The ball screw transmission mechanism has at least the following advantages: (1) High precision. It uses rolling elements such as balls and steel balls, which improves the movement mode based on the sliding type screw, thereby greatly improving the transmission efficiency and reducing the sliding problem; (2) Large load-bearing capacity. Balls or other rolling elements are introduced into the internal structure. This structure can not only improve the force transmission effect, but also absorb larger impact loads and torques. Therefore, the ball screw can withstand a larger load; (3) Smooth movement. The ball screw has smoother movement and less friction, thereby generating less shock and vibration during work; (4) Long life. The ball screw uses rolling elements such as balls. Since it is smoother than the sliding process, the corresponding mechanical loss is also smaller, so the ball screw has a longer service life.

[0027] Due to the heavy load, in order to improve the stability of the operation of the pallet 20, a guide column 33 is further provided in the chassis 40. The guide column 33 is arranged in the vertical direction, and the lower end of the guide column 33 is fixed to the bottom of the chassis 40, and the upper end is fixed to the top of the chassis 40. The guide hole 211 opened on the flange 21 through which the guide column 33 passes constitutes a guiding fit.

[0028] Furthermore, the motor 31 is located in the middle of the chassis 40, and a guide column 33 is provided at each of the four corners of the support plate 20. That is to say, a guide column 33 is provided at each end of the flange 21 on both sides of the support plate 20, and a total of four guide columns 33 are provided. The motor 31 corresponds to the middle position of the flange 21, so that the entire support plate 20 is evenly stressed and moves smoothly. The support plate 20 exerts even pressure on the binding belt 10, and the counter-pulsation effect is good.

[0029] Furthermore, a guide sleeve 331 is fixed to the bottom of the flange 21, and the hole core of the guide sleeve 331 coincides with the hole core of the guide hole 211. The guide column 33 is placed in the guide sleeve 331 to form a guide fit. Since the guide sleeve 331 has a certain length in the vertical direction, it can ensure that the pallet 20 must move up and down in the vertical direction. A position sensor 332 is provided on one of the guide columns 33. The position sensor 332 collects the position information of the pallet 20 and feeds it back to the control unit to monitor the stroke of the pallet 20. The position sensor 332 and the motor controller cooperate with each other to ensure the accuracy of the running position of the pallet 20, high precision of extrusion force control, and good counter-pulsation effect.

[0030] The binding belt 10 includes an inner airbag 11 and an outer bandage 12. The bandage 12 is made of a non-compliant material. 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 airbag 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 airbag 11 with flexible characteristics, it also helps to make the pressure on the patient's legs uniform and improve the counterpulsation treatment effect; the outer bandage 12 is a non-compliant material, inelastic, and can better restrain the limbs. The two sides of the bandage 12 are fixed on the top of the chassis 40 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 airbag 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.

[0031] In order to reduce the weight of the support plate 20 and the power of the motor 31, so as to achieve the purpose of light weight, small volume and low cost of the whole system, the support plate 20 is provided with a plurality of hollow parts at intervals in the length direction thereof, and the flange 21 is also provided with a hollow part, which ensures a uniform squeezing force on the binding belt 10 and reduces the weight of the whole device.

[0032] The motor 31 will generate a large amount of heat during operation. In order to ensure overall safe operation, the outer surface of the chassis 40 is evenly covered with heat dissipation holes to dissipate the heat generated by the motor 31 in a timely manner, while preventing impurities in the external environment from entering the chassis 40, avoiding affecting the normal function of the power system and improving the service life of the entire device.

[0033] A motor-driven 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 11 on the limbs and feeds it back to the control system. The control system controls the motor 31 to transmit a push signal, a hold signal and a release signal to the motor 31 in sequence within a cardiac pacing cycle.

[0034] When the ECG signal sensor detects the arrival of the R wave, the control system sends an ascending signal to the controller of the motor 20, 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 20. After the pressure is maintained for a certain period of time, the control system sends a descending signal to the controller of the motor 20, and the external counterpulsation is realized repeatedly. It should be noted that the pre-charge amount of the airbag 32 is adjusted according to the thickness of the patient's limbs before counterpulsation to ensure that the initial pressure for different patients is consistent. The precise squeezing of the limbs can be achieved by setting the ascending stroke of the support plate 20, and the real-time monitoring of the pressure sensor can be coordinated to further improve the counterpulsation effect.

[0035] 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 motor-driven external counterpulsation device, comprising a binding belt (10) and a support plate (20) arranged below the binding belt (10), wherein a lifting mechanism (30) drives the support plate (20) to move up and down to squeeze the binding belt (10) to reduce the area of ​​the restrained zone or release the binding belt (10) to increase the area of ​​the restrained zone, characterized in that: The lifting mechanism (30) comprises two motors (31) disposed on both sides of the support plate (20), the motor shafts (311) of the motors (31) being arranged in the vertical direction, the motors (31) being connected to the support plate (20) via a conversion assembly (32), and the conversion assembly (32) converting the rotational motion of the motor (31) into the linear motion of the support plate (20) in the vertical direction.

2. The motor-driven external counterpulsation device according to claim 1, characterized in that: The lifting mechanism (30) is arranged in a chassis (40). A notch is provided in the middle of the chassis (40) for placing the binding belt (10) and the support plate (20). The support plate (20) is made of a hard material and is in the shape of a U-shaped groove plate with an opening facing upward. The length of the groove is parallel to the axial direction of the binding belt (10). A flange (21) is provided at the notch of the U-shaped groove. The plate surface of the flange (21) is arranged in the horizontal direction. The motors (31) on both sides synchronously drive the two flanges (21) to move linearly in the vertical direction.

3. The motor-driven external counterpulsation device according to claim 2, characterized in that: The conversion assembly (32) comprises a ball screw (321), the lower end of the ball screw (321) is connected to the motor shaft (311) through a coupling (322), and the upper end is connected to the top of the chassis (40) to form an axial limit and circumferential rotation cooperation, a ball nut (323) is fixed on the flange (21), and the ball screw (321) passes through the ball nut (323) to form a transmission pair, and the motor (31) drives the ball screw (321) to rotate, driving the ball nut (323) and the support plate (20) to move linearly in the vertical direction.

4. The motor-driven external counterpulsation device according to claim 2, characterized in that: A guide post (33) is also provided in the chassis (40). The guide post (33) is arranged in a vertical direction. The lower end of the guide post (33) is fixed to the bottom of the chassis (40), and the upper end is fixed to the top of the chassis (40). The guide hole (211) formed on the flange (21) through which the guide post (33) passes constitutes a guide fit.

5. The motor-driven external counterpulsation device according to claim 4, characterized in that: The motor (31) is located in the middle of the chassis (40), and one guide column (33) is provided at each of the four corners of the support plate (20).

6. The motor-driven external counterpulsation device according to claim 4, characterized in that: A guide sleeve (331) is fixed to the bottom of the flange (21); the core of the guide sleeve (331) coincides with the core of the guide hole (211); a guide post (33) is placed in the guide sleeve (331) to form a guide fit; a position sensor (332) is provided on one of the guide posts (33); the position sensor (332) collects position information of the support plate (20) and feeds it back to the control unit.

7. The motor-driven external counterpulsation device according to claim 2, 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 (40) 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.

8. The motor-driven external counterpulsation device according to claim 2, characterized in that: The support plate (20) is provided with a plurality of hollow portions at intervals in the length direction thereof, and the flange (21) is also provided with a hollow portion.

9. The motor-driven external counterpulsation device according to claim 4, characterized in that: The outer surface of the chassis (40) is evenly and densely covered with heat dissipation holes.

10. A motor-driven external counterpulsation system, comprising the motor-driven 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 volume of the airbag (11) according to the thickness of the patient's limbs, the pressure sensor collects the pressure of the airbag (11) on the limbs and feeds it back to the control system, and the control system controls the motor (31) to transmit a push signal, a hold signal, and a release signal to the motor (31) in sequence within a cardiac pacing cycle.

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