An oscillating arm chest compression machine

Abstract

The application discloses a swing arm type chest compression machine, which comprises a machine body, a bandage arranged outside the machine body, a motor installed on the machine body, a curved surface turntable arranged inside the machine body, a plurality of curved surface convex parts arranged on one side of the curved surface turntable and extending along the axial direction of the curved surface turntable, and a swing piece arranged on the two sides of the curved surface turntable, wherein the central rotating shaft of the swing piece is connected with the machine body, the first end of the swing piece is always in contact with the edge curved surface on the curved surface convex part, the second end of the swing piece is connected with the end of the bandage, and the swing piece swings through the relative movement between the curved surface convex part and the swing piece when the curved surface turntable rotates, so that the bandage is tightened and loosened. The application solves the problems of single-point compression, low cardiopulmonary resuscitation efficiency and high overall gravity center of the existing external chest compression device.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a swing-arm type chest compression machine. Background Technology

[0002] Maintaining blood circulation during CPR (cardiopulmonary resuscitation) consists of basic elements such as chest compressions, relaxation, and ventilation, any of which can affect the generation of forward blood flow (reperfusion). During CPR, the kinetic energy of chest compressions by the rescuer is converted into an increase in intrathoracic pressure in the patient, generating forward blood flow with the assistance of cardiovascular valves. The efficiency of forward blood flow generated by chest compressions is determined by the frequency and force of chest compressions, as well as the proportion of chest compression duration to the total compression-relaxation time. Forward blood flow during CPR is achieved through the phasic relationship of intrathoracic pressure; chest compressions cause a uniform increase in pressure within the intrathoracic arterial and venous vascular system. Compression force is the main factor affecting blood flow generation. Increased compression force results in higher intrathoracic pressure and consequently increased forward blood flow; however, excessive compression can lead to trauma, chest contour deformation, and excessively high intrathoracic pressure, negatively impacting clinical outcomes.

[0003] In actual clinical practice, the manual compression depth of medical staff during CPR is often insufficient to achieve the goal of squeezing the chest cavity. Moreover, it is physically demanding for medical staff and cannot be performed for extended periods. Therefore, many hospitals are now equipped with cardiopulmonary resuscitation (CPR) devices to replace manual compression by medical staff. However, existing chest compression devices generally have a compression head that only presses down on the chest cavity, achieving only single-point compression and failing to deform the entire chest cavity contour. This makes CPR inefficient, and single-point compression can easily cause injury to the patient's chest.

[0004] In addition, current chest compression devices are generally quite tall. For example, the chest compression devices disclosed in the appearance design with publication number CN304758845S and the utility model with publication number CN209286115U both have a pressing rod extending from the lower end of the main unit. After the pressing rod extends, it is used to press the patient's chest cavity, and the main unit is passively raised. However, the mass of a main unit is generally quite large. If the main unit is passively raised, the center of gravity of the entire compression machine will rise, and then the equipment will become unstable and shake, affecting the stability of the chest compression device during use. Summary of the Invention

[0005] This invention provides a swing-arm chest compression machine with a simple structure, which solves the problems of existing chest compression devices that only have single-point compression, low cardiopulmonary resuscitation efficiency, and high overall center of gravity.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a swing-arm chest compression machine, comprising a body; a strap, disposed on the outside of the body; a motor, mounted on the body; a curved turntable, disposed inside the body, wherein one side of the curved turntable has a plurality of curved protrusions extending axially along the turntable; and swinging components, disposed opposite each other on both sides of the curved turntable, wherein the central axis of the swinging components is connected to the body, and the first end of the swinging components is always in contact with the edge curved surface on the curved protrusions; the second end of the swinging components... The end is connected to the end of the strap. When the curved turntable rotates, the relative movement between the curved protrusion and the swinging component causes the swinging component to swing, thereby tightening and loosening the strap. The curved turntable acts as the driving component of the swinging component. The curved protrusion enables the continuous swinging of the swinging component. The curved protrusion mainly pushes the first end of the swinging component downward, causing the second end of the swinging component to tilt upward. This is a lever principle. When the second end of the swinging component tilts upward, it pulls both ends of the strap closer to the body. In this way, the strap can compress the patient's chest cavity and deform the chest cavity contour.

[0007] Preferably, the edge surface of the curved protrusion includes a first curved surface and a second curved surface symmetrically arranged on both sides of the curved protrusion. The top of the curved protrusion is provided with a third curved surface connecting the first and second curved surfaces. A fourth curved surface is formed between adjacent curved protrusions. The first and second curved surfaces can guide the first end of the swinging member to swing up and down, so that it can withstand greater force when swinging. The third and fourth curved surfaces allow the first end of the swinging member to stay in these two positions for a certain period of time. In particular, at the position of the third curved surface, the strap can be kept in a tight state for a certain period of time, which improves the effect of cardiopulmonary resuscitation.

[0008] Preferably, the swinging component includes a swing arm with one end connected to both ends of a central rotating shaft and a connecting block mounted on the central rotating shaft. A follower extending towards the curved protrusion is mounted on one side of the connecting block. The follower is always in contact with the edge surface of the curved protrusion. The second end of the swing arm is connected to a strap. The central rotating shaft serves as the center of rotation and the fulcrum of the lever. The follower is an extended component that achieves eccentric contact between the curved protrusion and the central rotating shaft. Thus, when the follower moves, it can drive the connecting block and the central rotating shaft to rotate.

[0009] Preferably, the follower includes a cylindrical part and a connecting shaft connected to one end of the cylindrical part. The connecting shaft is connected to a connecting hole on the connecting block. The cylindrical part facilitates the contact between the follower and the curved protrusion. The connecting screw allows the follower to be removed from the connecting block.

[0010] Preferably, the follower includes a roller and a support screw disposed at one end of the roller's axial direction. The support screw is connected to a threaded hole on the connecting block. The contact between the roller and the curved protrusion can reduce the friction between the follower and the curved protrusion, reduce noise, and make the press machine run more smoothly.

[0011] Preferably, the follower and the edge surface of the curved protrusion are always in surface contact, which can reduce wear.

[0012] Preferably, the number of the curved protrusions is even, so that the two swinging parts on both sides can always maintain synchronous movement, thereby improving the efficiency of cardiopulmonary resuscitation.

[0013] Preferably, a connecting shaft is installed between the second ends of the swing arm. The connecting shaft can be connected to the strap to facilitate the installation of the strap and make the use of the strap more flexible.

[0014] Preferably, the first end of the strap is sleeved on the connecting shaft, and the second end of the strap is connected to a hook. The hook is hooked to the connecting shaft. At the same time, the hook can quickly remove the strap from the patient and can also quickly fix the compression machine to the patient, which is very convenient.

[0015] Preferably, the swing arm is located on the outside of the machine body, which helps to make the machine body smaller and reduce its height. Furthermore, the two ends of the machine body are provided with baffles to cover the swing arm. The baffles can cover the swing arm, which not only prevents the swing arm from getting caught on other objects when it rotates, but also improves the overall aesthetics of the press machine.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] With a simple structure and transmission mechanism and fewer parts, the probability of failure is reduced. Utilizing the linkage between the curved turntable and the swinging component, the swinging component rotates, causing the two ends of the strap to rise and tighten. This upward lifting and overall tightening of the strap allows for chest compression, resulting in high CPR efficiency and addressing the problems of existing chest compression devices that only offer single-point compression, leading to low CPR efficiency and the risk of chest injury from single-point compressions. Furthermore, during the tightening of the strap and the downward pressure on the main unit, the main unit effectively compresses the chest cavity. Throughout this process, the main unit's center of gravity does not shift upwards; it remains in contact with the chest cavity, reducing swaying and ensuring stability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2This is a front sectional view of the present invention;

[0020] Figure 3 This is a side sectional view of the present invention;

[0021] Figure 4 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 5 This is a three-dimensional structural diagram of the curved surface turntable of the present invention;

[0023] Figure 6 This is a coordinate graph showing the relationship between compression depth and time.

[0024] Figure 7 A schematic diagram illustrating the change in the center of gravity during the compression process of an existing chest compression machine;

[0025] Figure 8 This is a schematic diagram illustrating the change in the center of gravity during the chest compression process of the chest compression device of the present invention.

[0026] Figure label:

[0027] 1. Body, 11. Central pivot, 13. Connecting shaft, 2. Motor, 3. Enclosure, 4. Straps, 6. Swing arm, 7. Hook, 8. Curved turntable, 81. Curved protrusion, 9. Follower, 10. Connecting block, 1. First curved surface, 2. Third curved surface, 3. Second curved surface, 4. Fourth curved surface. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] like Figure 1-6As shown in Figure 8, this invention provides a technical solution to address the problems of existing chest compression devices, such as single-point compression, low cardiopulmonary resuscitation efficiency, and high overall center of gravity. The invention provides a swing-arm chest compression machine, comprising a body 1; a strap 4 disposed on the outside of the body 1; a motor 2 mounted on the body 1; a curved turntable 8 disposed inside the body 1, wherein a plurality of curved protrusions 81 extending axially along the side of the curved turntable 8 are evenly distributed; and swinging components disposed opposite each other on both sides of the curved turntable 8, wherein the central axis 11 of the swinging components is connected to the body 1, the first end of the swinging components is always in contact with the edge curved surface of the curved protrusions 81, and the second end of the swinging components is connected to the end of the strap 4. When the curved turntable 8 rotates, the relative movement between the curved protrusions 81 and the swinging components... The swinging component is made to swing, so that the binding strap 4 is tightened while its two ends are raised. The curved turntable 8 is the driving component of the swinging component. The curved protrusion 81 can realize the continuous swinging of the swinging component. The curved protrusion 81 mainly pushes the first end of the swinging component downward, so that the second end of the swinging component is raised. It is a lever principle. When the second end of the swinging component is raised, the two ends of the binding strap 4 are raised and pulled closer to the machine body 1 at the same time. In this way, the two ends of the binding strap 4 are raised and moved inward. On the one hand, the patient's chest is contracted, and on the other hand, the main machine 1 is forced to press down, which plays the role of chest compression and deforms the chest cavity contour. At the same time, the undulating shape of the curved protrusion 81 can realize the loosening of the binding strap 4. Therefore, the unidirectional rotation of the curved turntable 8 can realize the repeated swinging of the swinging rod, realizing the alternating loosening and tightening of the binding strap 4.

[0030] Specifically, the strap 4 is a wide band with a large force-bearing area, which can firmly fix the patient. The motor 2 can be a high-torque flat DC brushless motor, which is small in size, low in height, and low in center of gravity. It can be installed on the upper part of the machine body 1. The lower end of the main shaft of the motor 2 is connected to the center of the curved turntable 8. Alternatively, a reducer can be set between the main shaft of the motor 2 and the curved turntable 8 to realize the speed change transmission between the motor 2 and the curved turntable 8. The curved turntable 8 is frustum-shaped. Its curved protrusion 81 can be machined from the side wall of the curved turntable 8 or it can be machined as a whole from its lower end face. The curved protrusion 81 can form a continuous wavy edge surface. The structure of the swinging component can be of many kinds, as long as it can produce a lever drive effect. The rotation support point is connected to the machine body 1.

[0031] In this embodiment, as Figure 5As shown, as a specific structure of the curved protrusion 81, the edge surface of the curved protrusion 81 includes a first curved surface T1 and a second curved surface T3 symmetrically arranged on both sides of the curved protrusion 81. The top of the curved protrusion 81 is provided with a third curved surface T2 connecting the first curved surface T1 and the second curved surface T3. A fourth curved surface T4 is formed between adjacent curved protrusions 81. The first curved surface T1 and the second curved surface T3 can guide the first end of the swing member to swing up and down, so that it can withstand greater force when swinging. At the same time, when the strap 4 is loosened, under the action of the chest cavity restoring force, the second curved surface T3 of the curved protrusion 81 also plays a role in limiting the rebound speed, and the swing member swings in the opposite direction. The third curved face T2 and the fourth curved face T4 allow the first end of the swinging component to remain in these two positions for a certain period of time. Especially at the third curved face T2 position, which corresponds to the deepest compression of the chest cavity, holding the position for a while helps to fully pump blood out of the heart. The fourth curved face T4 corresponds to the most relaxed position of the chest cavity, holding the position for a while helps to facilitate blood return to the heart. Corresponding to... Figure 6 It can be seen that the brief pause between T2 and T4 can be displayed as a plateau on the waveform of the compression, and this plateau period is good for the compression effect.

[0032] For example, the curved protrusion 81 is formed on the side wall of the curved turntable 8. The interior of the curved turntable 8 is hollowed out. The first curved surface T1 and the second curved surface T3 extend to the inner top surface of the curved turntable 8. The fourth curved surface T4 is also located on the inner top surface of the curved turntable 8. The number of the curved protrusions 81 is even. An even number of curved protrusions 81 allows the swinging parts on both sides to always maintain synchronous movement, thereby improving the efficiency of cardiopulmonary resuscitation. The number of curved protrusions 81 is preferably 2 or 4, which can be adjusted as needed.

[0033] like Figure 6 As shown, the first end of the swinging member moves with the four curved surfaces formed by the edge surface of the curved protrusion 81 to form a pressing cycle, and this cycle is repeated.

[0034] In this embodiment, as Figure 2-4As shown, the swinging component includes a swing arm 6 with its first end connected to both ends of the central rotating shaft 11 and a connecting block 10 mounted on the central rotating shaft 11. A follower 9 extending towards the curved protrusion 81 is mounted on one side of the connecting block 10. The follower 9 is always in contact with the edge surface of the curved protrusion 81. The second end of the swing arm 6 is connected to the strap 4. The central rotating shaft 11 serves as the rotation center and the fulcrum of the lever. The follower 9 is an extended component that achieves eccentric contact between the curved protrusion 81 and the central rotating shaft 11. Thus, when the follower 9 moves, it can drive the connecting block 10 and the central rotating shaft 11 to rotate. The central rotating shaft 11 and the connecting block 10 can be connected by a spline.

[0035] As a first specific embodiment of the follower 9, the follower 9 includes a cylindrical part and a connecting shaft connected to one end of the cylindrical part. The connecting shaft is connected to a connecting hole on the connecting block 10. The cylindrical part facilitates the contact between the follower 9 and the curved protrusion 81. The connecting screw allows the follower 9 to be removed from the connecting block 10. The surface of the cylindrical part is smooth. It can be fixedly connected to the connecting shaft or rotatably connected. The connecting shaft can also be an integral structure with the cylindrical part. The connecting shaft can be fixedly connected to the connecting block 10 or rotatably connected.

[0036] As a second specific embodiment of the follower 9, the follower 9 includes a roller and a support screw disposed at one end of the roller's axial direction. The support screw is connected to a threaded hole on the connecting block 10. The contact between the roller and the curved protrusion 81 can reduce the friction between the follower 9 and the curved protrusion 81, reduce noise, and make the press machine run more smoothly. The roller can be a rubber roller or a metal roller, while the support screw acts as the central axis of the roller.

[0037] In addition, the follower 9 and the edge surface of the curved protrusion 81 are always in surface contact. Surface contact can reduce wear, so the inclination of the cross section of the edge surface of the curved protrusion 81 will change in real time, so that when the follower 9 swings, the follower 9 and the curved protrusion 81 can also be in surface contact.

[0038] For convenience, a connecting shaft 13 is installed between the second ends of the swing arm 6. The connecting shaft 13 facilitates the installation of the strap 4, making its use more flexible. Simultaneously, the first end of the strap 4 is fitted onto the connecting shaft 13, and the second end of the strap 4 is connected to a hook 7. The hook 7 is hooked onto the connecting shaft 13, allowing for quick removal of the strap 4 from the patient and rapid attachment of the compression device to the patient, which is very convenient.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. An oscillating arm chest compression machine characterized by, The utility model relates to a chest compression device, which comprises: a machine body (1); a motor (2) mounted on the machine body (1); a curved surface turntable (8) arranged inside the machine body (1), one side of the curved surface turntable (8) being uniformly provided with a plurality of curved surface protruding parts (81) extending along the axial direction of the curved surface turntable (8); a swing member oppositely arranged on both sides of the curved surface turntable (8), the central rotating shaft (11) of the swing member being connected with the machine body (1), the first end of the swing member extending to a position corresponding to the edge curved surface on the curved surface protruding part (81), and the second end of the swing member being used for being connected with a bandage (4), the first end of the swing member being relatively moved with the edge curved surface of the curved surface protruding part (81) when the curved surface turntable (8) rotates, so that the swing member swings, and the tightening and loosening of the bandage (4) are realized; the edge curved surface of the curved surface protruding part (81) comprises a first curved surface part (T1) and a second curved surface part (T3) symmetrically arranged on both sides of the curved surface protruding part (81), and the top of the curved surface protruding part (81) is provided with a third curved surface part (T2) connecting the first curved surface part (T1) and the second curved surface part (T3), and a fourth curved surface part (T4) is formed between adjacent curved surface protruding parts (81); the swing member comprises a swing arm (6) connected at both ends of the central rotating shaft (11) and a connecting block (10) mounted on the central rotating shaft (11), one side of the connecting block (10) being mounted with a follower (9) extending towards the curved surface protruding part (81), the follower (9) being always in contact with the edge curved surface of the curved surface protruding part (81), and the second end of the swing arm (6) being used for being connected with the bandage (4).

2. The swing arm chest compression machine of claim 1, wherein: the first end of the swing member is always in contact with the edge curved surface on the curved surface protruding part (81).

3. The swing-arm chest compression machine of claim 1, wherein: the utility model further comprises the bandage (4), the bandage (4) being located outside the machine body (1), and both ends of the bandage (4) being connected with the swing arm type chest compression device to form a closed loop structure.

4. The swing-arm chest compression machine of claim 1, wherein: the follower (9) comprises a cylindrical member and a connecting shaft connected at one end of the cylindrical member, and the connecting shaft is connected with a connecting hole on the connecting block (10).

5. The swing-arm chest compression machine of claim 1, wherein: the follower (9) comprises a roller and a supporting screw rod arranged at one end of the roller in the axial direction, and the supporting screw rod is connected with a threaded hole on the connecting block (10).

6. The swing-arm chest compression machine of claim 1, wherein: the follower (9) is always in surface contact with the edge curved surface of the curved surface protruding part (81).

7. The swing-arm chest compression machine of claim 1, wherein: the number of the curved surface protruding parts (81) is even.

8. The swing-arm chest compression machine of claim 1, wherein: a connecting shaft (13) is mounted between the second ends of the swing arms (6).

9. The swing-arm chest compression machine of claim 8, wherein: the first end of the bandage (4) is sleeved on the connecting shaft (13), the second end of the bandage (4) is connected with a hook member (7), and the hook member (7) is hooked with the connecting shaft (13).

10. The swing-arm chest compression machine of claim 1, wherein: the swing arms (6) are located outside the machine body (1), and the machine body (1) is provided with a surrounding baffle (3) covering the swing arms (6) at both ends.

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