A delicate pulsating pump

Abstract

The present invention relates to a delicate pulsating pump, belonging to the field of medical teaching instruments. A delicate pulsating pump includes a squeezing mechanism, a heart model and a control box. The squeezing mechanism includes a driving motor, a base, a connecting plate, a slider and a swing rod. The driving motor is installed and fixed on the base through the threaded hole at its tail. The connecting plate is fixed on the axial end face of the driving motor. The slider is installed on the motor shaft and moves up and down as the motor shaft rotates forward and backward. There are several swing rods in the whole device. There are two branches at the tail of the swing rod, and these two branches are respectively connected to the connecting plate and the slider. The synchronous swing of each swing rod is driven by the movement of the slider. The heart model is surrounded by all the swing rods and fixed on the swing rods.

Description

Technical Field

[0001] The present invention relates to the technical field of medical teaching instruments, and more specifically, to a delicate pulsating pump. Background Art

[0002] Therefore, it is particularly important to study effective treatment methods for cardiovascular diseases and the formation mechanism of cardiovascular diseases, so as to effectively reduce the incidence probability. Therefore, it is necessary to deeply analyze and study the cardiovascular fluid characteristics and the pathogenesis of cardiovascular diseases. To facilitate clinicians' understanding of the human blood circulation law, it is necessary to develop a pulsating device that can simulate the blood flow in blood vessels. Summary of the Invention

[0003] Generally, the way to simulate the pulsating effect of the heart is to reciprocally fill and extract liquid into and out of the heart model through a specific device and an external pipeline, so as to achieve the pulsating effect. Such pulsating devices are often relatively large in size. The real heart realizes the blood return and pumping through the contraction and relaxation of its own muscles. In order to make the operation process of the pulsating device more in line with the heart work principle and further reduce the device volume, a delicate pulsating pump is proposed.

[0004] To achieve the above object, the present invention provides the following technical solutions, mainly including:

[0005] A delicate pulsating pump includes an extrusion mechanism, a heart model, and a control box. The extrusion mechanism includes a driving motor, a base, a connecting plate, a slider, and a swing rod. The driving motor is installed and fixed on the base through the threaded hole at its tail. The connecting plate is fixed on the axial end face of the driving motor. The slider is installed on the motor shaft and moves up and down as the motor shaft rotates forward and backward. There are several swing rods in the whole device. The tail of the swing rod has two branches, which are respectively connected to the connecting plate and the slider. The movement of the slider drives each swing rod to swing synchronously. The heart model is surrounded by all the swing rods and fixed on the swing rods.

[0006] Preferably, the base is made of stainless steel or aluminum alloy, and is an overall square plate with a thickness of not less than 5 mm. Holes are opened on the base for installing and fixing the driving motor.

[0007] Preferably, the driving motor can be selected from one of an AC asynchronous motor, a DC permanent magnet synchronous motor, or a DC stepping motor.

[0008] Preferably, the driving motor is a DC stepping motor. The transmission shaft of the motor is a threaded shaft, and the pitch is in the range of 6 mm - 10 mm. The stepping motor is a two-phase hybrid type, the step angle is 1.8°, the rated torque of the motor is not less than 3 N·m, and the rated speed is 1500 rpm.

[0009] Preferably, the connecting plate is processed from a metal material. The connecting plate is of a circular structure as a whole, with a hole in the middle of the circle to facilitate the motor shaft to pass through it, and screw holes are processed around the hole for fixing the connecting plate to the motor end face.

[0010] Preferably, the slider and the motor shaft are matched in a threaded manner. A threaded internal thread is processed in the middle of the slider, and the pitch of the threaded internal thread on the slider is the same as that of the motor shaft.

[0011] Preferably, there are 4 - 6 swing rods in the overall device. The single overall length of each swing rod covers the entire heart model, and the overall shape is a long strip that can fit the outer wall of the heart model. There are two branches at the tail of the swing rod, which are respectively used to connect with the slider and the connecting plate.

[0012] Preferably, the heart model can be made of soft materials such as polyurethane or silica gel.

[0013] Preferably, the heart model is made of silica gel material with a hardness of 20 degrees. When the silica gel heart model is fixedly placed on the swing rod, their relative positions are similar to placing a set of extrusion mechanisms directly below the human heart. Then, the position where the heart model and the swing rod are in contact is coated with AB - component adhesive glue for reliable fixation. In this way, as the swing rod swings back and forth, the heart model will synchronously contract and relax accordingly.

[0014] Preferably, the control box is connected to the driving motor through a communication cable. The control box includes a power supply, a controller, a touch screen, buttons, and various interaction interfaces, etc.; the controller in the control box selects a motion control card containing a 32 - bit single - chip microcomputer chip; in the control program, at least the motion parameters of two motors can be programmed: the number of turns of the motor rotation determines the amplitude of the chamber contraction and relaxation actions, and the rotation speed of the motor determines the frequency of the chamber contraction and relaxation actions. Therefore, the heart rate and stroke volume are independent variables for this device. By segmenting the number of turns of the motor rotation in the program and assigning corresponding running speeds to each segment of displacement, a simple hemodynamic physiological waveform simulation can be achieved.

[0015] It can be seen from the above - mentioned technical solutions that, compared with the prior art, different from the conventional liquid - filled passive pulsation device in the ventricle, this device is an active pulsation generating device. The claws can be compared to the myocardium, and it directly acts on the ventricle; from a system perspective, the ventricle is the power source of the whole vascular model and can be consistent with the working principle of the real heart. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0017] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0018] Figure 2 It is a three-dimensional structure schematic diagram of the extrusion mechanism of the present invention.

[0019] Explanation of reference numerals: A - driving motor, B - base, C - connecting plate, D - slider, E - swing rod, F - heart model, G - control box. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0021] Embodiment 1

[0022] The present invention provides a set of delicate pulsating pump devices, which are generally composed of a driving motor A, a base B, a connecting plate C, a slider D, a swing rod E, a heart model F and a control box G. Among them, the driving motor A is installed and fixed on the base B through the threaded hole at its tail, the connecting plate C is fixed on the axial end face of the driving motor A, the slider D is installed on the motor shaft, and moves up and down as the motor shaft rotates forward and backward. There are several swing rods E in the whole device. The tail of the swing rod E has two branches, which are respectively connected to the connecting plate C and the slider D. The movement of the slider D drives each swing rod E to swing synchronously. The heart model F is surrounded by all the swing rods E and fixed on the swing rods E. Therefore, the rotation of the motor drives the swing rods E to swing, and the swinging action of the swing rods E will produce an inward extrusion or an outward pulling effect on the heart model F. In this way, the size of the liquid volume in the chamber of the heart model F can be periodically changed to simulate the work process of the heart.

[0023] The control box G is connected to the driving motor A through a communication cable. The control box G includes a power supply, a controller, a touch screen, buttons and various interaction interfaces, etc.

[0024] The base B bears a relatively large weight load, so it is made of stainless steel or aluminum alloy. It is an overall square plate with a thickness of not less than 5 mm. Openings are made on the base B for installing and fixing the drive motor A.

[0025] The whole set of mechanism is driven by a rotary motor. As for the motor, an AC asynchronous motor, a DC permanent magnet synchronous motor or a DC stepper motor can be selected. Considering comprehensively from aspects such as the motor response characteristics and control accuracy, a DC stepper motor is preferably selected. The transmission shaft of the motor is a threaded shaft, and the pitch ranges from 6 mm to 10 mm. The stepper motor is a two-phase hybrid type with a step angle of 1.8°. The rated torque of the motor is not less than 3 N·m, and the rated speed is 1500 rpm.

[0026] The function of the connecting plate C is to connect the rotating shaft part of the swing rod E and the motor end face. Therefore, the connecting plate C is required to have sufficient rigidity. The connecting plate C is made of metal materials. The connecting plate C is an overall circular structure, with an opening in the middle of the circle to facilitate the motor shaft to pass through. Screw holes are machined around the opening to fix the connecting plate C to the motor end face.

[0027] The slider D and the motor shaft are matched in a threaded manner. Threaded internal threads are machined in the middle of the slider D, and the pitch of the threaded internal threads on the slider D is the same as that of the motor shaft.

[0028] The swing rod E is used to apply periodic extrusion and pulling forces to the model. There are 4 - 6 swing rods E in the system. The single overall length of it covers the entire heart model F. The overall shape is a long strip that can fit the outer wall of the heart model F. There are two branches at the tail of the swing rod E, which are respectively used to connect with the slider D and the connecting plate C. The swing rod E is connected to the slider D and the connecting plate C through roller bearings. Driven by the motor rotating shaft, the slider D drives the swing rod E to make a certain amplitude of swinging motion with the connection point between the swing rod E and the connecting plate C as the center of the circle. All the swing rods E are connected and fixed to the slider D and the connecting plate C in the same way. Therefore, when the motor rotates, all the swing rods E swing synchronously with the same amplitude and angular velocity.

[0029] The heart model F can be made of soft materials such as polyurethane or silicone. It is preferably made of silicone material with a hardness of 20 degrees. When the silicone heart model F is fixedly placed on the swing rod E, their relative positions are similar to placing a set of extrusion mechanisms directly below the human heart. Then, the positions where the heart model F and the swing rod E are in contact with each other are coated with AB-component adhesive glue for reliable fixation. In this way, as the swing rod E swings back and forth, the heart model F will synchronously contract and relax accordingly.

[0030] The control box G has the following functions: providing power for the mechanism, facilitating user operation, running control programs to control the movement of the swing rod E, etc. The control box G contains a power supply, a controller, a touch screen, buttons, and various interaction interfaces, etc. Among them, the controller preferably uses a motion control card containing a 32-bit single-chip microcomputer chip. In the control program, at least the motion parameters of two motors can be programmed: the number of turns of the motor rotation determines the amplitude of the chamber contraction and relaxation actions, and the rotation speed of the motor determines the frequency of the chamber contraction and relaxation actions. Therefore, the heart rate and stroke volume are independent variables for this device. By segmenting the number of turns of the motor rotation in the program and assigning corresponding running speeds to each segment of displacement, a simple hemodynamic physiological waveform simulation can be achieved.

[0031] Embodiment 2

[0032] Make a silicone heart model F with a hardness of 20 degrees. At the same time, leave two passages in the model, which are the liquid inlet and outlet respectively. Install a one-way valve on the inlet and outlet according to the liquid flow direction to achieve the one-way flow of the liquid. Fix the silicone heart model F with the one-way valve on the swing rod E with adhesive glue, and connect the model to the water tank with a pipe. In the program, set the reciprocating period of the swing rod E to 0.8 s, that is, the heart beating period is also 0.8 s, and set the swing angle amplitude of the swing rod E to 30°. After setting, start the pulsating pump on the control box G, and the heart will beat at a speed of 75 BPM, and at the same time generate an output flow corresponding to the swing amplitude of the swing rod E.

[0033] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A delicate pulsating pump, characterized in that, It includes an extrusion mechanism, a heart model and a control box. The extrusion mechanism includes a driving motor, a base, a connecting plate, a slider and a swing rod. The driving motor is installed and fixed on the base through the threaded hole at its tail. The connecting plate is fixed on the axial end face of the driving motor. The slider is installed on the motor shaft and moves up and down as the motor shaft rotates forward and backward. There are several swing rods in the whole device. The tail of the swing rod has two branches, which are respectively connected to the connecting plate and the slider. The movement of the slider drives each swing rod to swing synchronously. The heart model is surrounded by all the swing rods and fixed on the swing rods. The control box is connected to the driving motor through a communication cable. The control box includes a power supply, a controller, a touch screen, buttons and various interaction interfaces. The controller in the control box selects a motion control card containing a 32-bit single-chip microcomputer chip. In the control program, at least two motor motion parameters can be programmed: the number of turns of the motor rotation determines the amplitude of the chamber contraction and relaxation actions, and the rotation speed of the motor determines the frequency of the chamber contraction and relaxation actions. Therefore, the heart rate and stroke volume are independent variables for this device. By segmenting the number of turns of the motor rotation in the program and assigning corresponding running speeds to each segment of displacement, a simple hemodynamic physiological waveform simulation can be achieved.

2. The delicate pulsating pump according to claim 1, wherein The base is made of stainless steel or aluminum alloy. It is a square plate with a thickness of not less than 5 mm. Holes are drilled in the base for installing and fixing the driving motor.

3. The delicate pulsating pump according to claim 1, characterized in that, The driving motor can be selected from an AC asynchronous motor, a DC permanent magnet synchronous motor or a DC stepper motor.

4. The delicate pulsating pump according to claim 3, characterized in that, The driving motor is selected as a DC stepper motor. The transmission shaft of the motor is a threaded shaft with a pitch in the range of 6 mm - 10 mm. The stepper motor is a two-phase hybrid type with a step angle of 1.8°. The rated torque of the motor is not less than 3 N·m, and the rated speed is 1500 rpm.

5. The delicate pulsating pump according to claim 1, wherein The connecting plate is made of metal material. The connecting plate is a circular structure with a hole in the middle to facilitate the motor shaft to pass through. Screw holes are machined around the hole to fix the connecting plate on the motor end face.

6. The delicate pulsating pump according to claim 1, characterized in that, The slider and the motor shaft are matched in a threaded manner. The middle of the slider is machined with internal threads, and the pitch of the internal threads on the slider is the same as the pitch of the motor shaft.

7. An exquisite pulsating pump according to claim 1, characterized in that, There are 4 - 6 swing rods in the whole device. The single overall length of each swing rod covers the whole heart model. The overall shape is a long strip that can fit the outer wall of the heart model. The tail of the swing rod has two branches, which are respectively used to connect to the slider and the connecting plate.

8. The control system of a delicate pulsating pump according to claim 1, characterized in that, The heart model can be made of soft materials such as polyurethane or silicone.

9. The control system of a delicate pulsating pump according to claim 8, characterized in that, The heart model is made of silicone material with a hardness of 20 degrees. When the silicone heart model is fixed on the swing rod, their relative position is that a set of extrusion mechanism is placed directly below the human heart. Then, the position where the heart model and the swing rod are in contact is smeared with AB-component adhesive glue for reliable fixation. In this way, as the swing rod swings back and forth, the heart model will synchronously contract and relax.

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