Portable lever-type cardiopulmonary resuscitation device and hospital bed equipped with the device

Abstract

A lightweight lever-type cardiopulmonary resuscitation (CPR) device includes a compression head, a compression lever, and a connecting seat for connecting to a bed edge component. The compression lever has a pivot shaft, and the pivot shaft is fitted with a bearing seat. The pivot shaft is rotatably mounted on the bearing seat, which is mounted on the connecting seat. A slider is located in the middle section of the compression lever, and the slider also has a locking component. A hinge shaft connects the compression head and the slider. The lower part of the connecting seat has a hook, which connects the connecting seat to the bed edge component. The bearing seat on the connecting seat can swing left and right relative to the bed edge component. After the hook of the connecting seat engages with the bed edge component, the entire CPR device forms three synergistically functioning movable joints. This invention utilizes the lever principle to achieve effortless compression and allows the compression head to maintain a simple vertical movement during compression, while being compact and lightweight. This invention also provides a hospital bed.

Description

Technical Field

[0001] This utility model belongs to the technical field of medical equipment, specifically relating to a lightweight lever-type cardiopulmonary resuscitation device and a hospital bed equipped with the cardiopulmonary resuscitation device. Background Technology

[0002] The term "hospital bed" as used in this application includes hospital beds in various departments, mobile beds that can be moved within the hospital to transfer patients, and ambulance gurneys used in ambulances; ambulance gurneys and mobile beds within the hospital, which have the function of transferring patients, are collectively referred to as medical transport beds. Hospital beds all have a bed frame and a bed board. The part of the bed frame located at the edge of the bed is called the bed edge frame. In most fixed hospital beds, the horizontal projection of the bed edge frame is close to the bed board. The legs of ambulance gurneys can usually be rotated and folded. When placed on an ambulance, the legs are folded into a horizontal position; when dragged from the ambulance to the ground, the legs automatically extend to an upright position.

[0003] Critically ill patients may experience cardiac arrest in their hospital beds, especially in ambulances and emergency rooms. It is crucial to begin chest compressions as quickly as possible; otherwise, the patient may suffer irreversible damage to the brain and other vital organs due to ischemia. Every second earlier compressions begin increases the patient's chances of survival. A compression depth of approximately 6 centimeters is required to generate sufficient pressure to deliver blood to the brain. However, manual chest compressions are strenuous; most people feel exhausted after only one or two minutes. Therefore, mechanical chest compression devices (also known as cardiopulmonary resuscitation devices) were designed for use in hospital beds. These devices have compression heads. During compressions, it is essential to avoid breaking the ribs on either side of the sternum. The compression head should be kept as horizontal and in close contact with the sternum as possible, avoiding tilting, to ensure even pressure on both sides of the ribs.

[0004] From the perspective of installation method, mechanical chest compression devices used in hospital beds can be classified into three categories. The first category is electric compression devices that are strapped to the patient's torso. These devices are expensive, often costing hundreds of thousands of yuan, making widespread adoption difficult. The second category is chest compression devices where the base is placed under the patient's torso, requiring the patient's torso to compress the base during use. Because this requires the patient torso to compress the base, it means the patient needs to be lifted onto the base, making it inconvenient and hindering timely resuscitation efforts; therefore, it has not been widely adopted. The third category is chest compression devices where the base is installed on the edge of the bed frame. For Class III mechanical chest compression devices, the primary challenge is securing the base to the bed frame. The common structure utilizes a horizontal clamping groove and tightening bolts for fixation, as disclosed in patent documents such as CN205964435U, CN2853063Y, CN87206988, CN215081965U, CN218391616U, CN219783135U, CN215460055U, CN209450909U, and CN204636945U. As mentioned earlier, the inner side of most fixed hospital beds is adjacent to the bed board, making it difficult for the groove wall to pass vertically between the frame and the board. Therefore, the groove opening faces horizontally, hence the name "horizontal clamping groove." Figure 1 , Figure 2 , Figure 3 The shown fixing structure is a clamping and fixing structure consisting of a horizontal clamping groove and a clamping bolt. The clamping bolt 72 passes through the lower wall of the horizontal clamping groove 73. After the clamping bolt 72 is tightened, its end face presses tightly against the bed edge frame 70. The bed edge frame 70 is clamped by the clamping bolt 72 and the upper wall of the horizontal clamping groove 73, generating significant friction between the end face of the clamping bolt 72 and the bed edge frame 70, thus preventing the horizontal clamping groove 73 from slipping along the surface of the bed edge frame 70. The essence of this clamping and fixing structure is to achieve fastening through strong clamping force and friction. The clamping bolt 72 must maintain a strong pressure on the bed edge frame 70 at all times. The clamping bolt 72 must be tightened forcefully, and the horizontal clamping groove 73 and the bed edge frame 70 must be absolutely stable, without any loosening. Even slight loosening will cause the pressure to gradually weaken and cannot recover on its own, ultimately leading to the complete failure of the fixing structure. The above-mentioned compression device generally requires two people to complete the installation. The first person holds the swing end of the compression lever on the first side of the bed, and the second person on the second side of the bed fastens the horizontal clamp into the bed frame and tightens it.

[0005] More importantly, the above structure has the following problem for lever-type CPR devices that can reduce effort by about half: If the pressing head 1 is fixedly connected to the pressing lever 2 during the swinging motion of the pressing head 1 along with the pressing lever 2, the bottom surface of the pressing head 1 will tilt synchronously with the axial direction of the pressing lever 2, such as... Figure 1 As shown, this creates an imbalance of force on the chest, which can easily lead to the fracture of ribs next to the sternum. Furthermore, the degree of tilt of the compression head is solely determined by the swing angle of the compression lever, and is forcibly caused. (The above...) Figure 1 Even if the bottom surface of the pressing head 1 is changed to an arc shape, the actual force-bearing part is only changed to a tangent point with a small area. Moreover, the tangent point continuously migrates and changes along the arc surface during the pressing process. The lateral coordinate position of the tangent point is not fixed, and the goal of synchronous and uniform force distribution cannot be achieved.

[0006] To solve the above problems, a hinge shaft 10 was added between the pressing head 1 and the pressing lever 2 so that the bottom surface of the pressing head 1 would not be forced to remain parallel to the axis of the pressing lever 2; however, new problems arose, such as Figure 2 As shown, during the downward pressing process, as the tilt of the pressing lever 2 changes, the horizontal lateral distance between the hinge axis 10 and the swing axis 3 will change according to a trigonometric function relationship, and the lateral position of the hinge axis 10 will change (e.g., Figure 2 In the process of the pressing lever 2 in the above figure swinging downwards until it becomes the state shown in the lower figure, the lateral coordinate position of the hinge shaft 10 moves to the left, and the hinge shaft 10 will then pull the upper part of the pressing head 1 to tilt to the left. However, there is a large horizontal static friction between the bottom surface of the plastic pressing head and the sternum, so it cannot move laterally. Therefore, the pressing head 1 tilts and rotates, and the pivot point of rotation is the side end point located at the bottom of the pressing head (e.g., Figure 2 (Point A in the lower left corner of the press head), therefore in Figure 2 In the state shown in the image below, the pressure from compression head 1 is concentrated on one side of the chest, and the pressure point cannot be evenly distributed across the entire bottom surface of the compression head. In severe cases, there is even a possibility that compression head 1 may completely tip over. Figure 3 As shown ( Figure 2 If this trend continues, then... Figure 3 (As shown in the diagram). For a specific lever-type CPR device, the aforementioned issue of the compression head tilting is also caused by the inherent structure of the CPR device itself, and the degree of compression head tilting and the swing angle of the compression lever also exhibit a unique and definite functional relationship.

[0007] Due to the aforementioned problems, some lever-type cardiopulmonary resuscitation devices can only maximize the vertical distance between the hinge shaft 10 and the bottom surface of the compression head 1. Figure 2 (mid-distance h), for example, the mid-distance h) Figure 2The mid-distance h is designed to be more than 50 cm, which reduces the tilt angle of the pressing head caused by the lateral movement of the hinge shaft 10. However, this only alleviates the tilt problem and cannot fundamentally solve it. Moreover, this will greatly increase the size of the cardiopulmonary resuscitation device, making it less portable and inconvenient to store, install, and use.

[0008] In existing lever-type cardiopulmonary resuscitation devices, to fundamentally solve the tilting problem, a vertical guide hole mechanism must be added to the compression head. This is the structure disclosed in devices such as CN205964435U, CN222055899U, CN215230117U, CN215081966U, CN115813739A, CN107550712A, and CN210812463U. The basic structure of the vertical guide hole mechanism is as follows: Figure 4 As shown: The pressing head 1 itself has a vertical guide rod 11, which passes through a vertical guide hole 110. The horizontal cross-section of the vertical guide rod 11 matches the horizontal cross-section of the vertical guide hole 110, thus limiting the vertical guide rod 11 and the pressing head 1 to only perform vertical movement. Under this structural condition, since the pressing head maintains a vertical movement of 6 cm, the top of the pressing head 1 and the pressing lever 2 cannot be directly connected by a hinge shaft, nor can they be fixed as one piece. Instead, they need to be able to slide relatively left and right (sliding as...). Figure 4 (As shown by the double-headed arrow). In addition, the prerequisite for the above-mentioned vertical guide hole mechanism to function is that the position and posture of the vertical guide hole 110 are absolutely fixed relative to the hospital bed. For this reason, it is necessary to add other auxiliary connection and positioning frame structures between the hospital bed and the vertical guide hole 110. This also makes the entire compression device complex in structure, shape, size, weight, inconvenient to store and carry, and difficult to install.

[0009] In summary, even with a hinged shaft, existing lever-type CPR devices cannot fundamentally solve the problem of the compression head tilting due to the device structure, and cannot achieve the goal of maintaining a basic vertical movement of the compression head during compression. In existing technologies, lightweight lever-type CPR devices, in order to solve the problem of the compression head's tilting bottom surface, invariably have to abandon the hinged shaft structure and adopt a bulky and complex vertical guide hole mechanism for guidance.

[0010] Furthermore, existing lever-type mechanical chest compression devices are difficult to adapt to the specialized ambulance stretchers due to their complex structure. This is because the ambulance compartment is narrow, and medical personnel can only be positioned on one side of the bed (where a seat is located). It is difficult to screw a lever-type manual chest compression device onto the bed frame on the opposite side of the seat within the compartment. In other words, it is difficult to equip ambulances with existing lever-type mechanical chest compression devices. If a patient experiences cardiac arrest during transport and requires chest compressions, manual chest compressions must be performed, which presents significant difficulties, drawbacks, and risks: Firstly, the interior width of the ambulance compartment is narrow, such as... Figure 5 As shown, the lateral width of the passage between the transfer bed 7 and the seat 92 is too narrow to accommodate medical staff kneeling down, forcing them to operate in a semi-squatting, semi-standing position. This uncomfortable posture severely affects the normal operation of medical staff. Secondly, the bumps and swaying generated during the high-speed travel of the ambulance make it difficult to control the pressure and depth of chest compressions. More seriously, if there is an emergency stop, sharp turn, or sudden bump, the medical staff performing chest compressions are likely to fall, posing a significant risk.

[0011] Similarly, the installation structure of the aforementioned lever-type manual mechanical chest compression device is not suitable for medical transport beds within hospitals. This is because when a patient experiences cardiac arrest during transport within the hospital, the transport bed must be moved quickly to reach the emergency room as soon as possible. However, due to the cumbersome movement and installation of the lever-type manual mechanical chest compression device, it is impossible to wait for the installation of the heavy compression device during transport in order to save every second for the patient. Medical staff must bravely jump onto the rapidly moving transport bed and perform chest compressions on the patient. Although this scene is touching and commendable, there is a risk of medical staff falling off due to the swaying, turning, and narrowness of the transport bed (vehicle). In addition, the narrowness of the transport bed also restricts the compression posture of the rescuers, making it difficult to standardize the compression movements and resulting in poor compression quality. Utility Model Content

[0012] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a lightweight lever-type cardiopulmonary resuscitation device and a hospital bed equipped with the cardiopulmonary resuscitation device. It can make pressing effortless by using the lever principle, and avoid the forced left and right tilting of the pressing head caused by the structure of the cardiopulmonary resuscitation device itself. It can keep the pressing head basically vertical during the pressing process without tilting left and right. It is also small and lightweight, and easy and quick to install.

[0013] The lightweight lever-type cardiopulmonary resuscitation device of this utility model is achieved by the following scheme: A lightweight lever-type cardiopulmonary resuscitation device includes a compression head, a compression lever, and a connecting seat for connecting to the edge of a hospital bed. The compression lever is provided with a swing shaft, and the swing shaft is fitted with a bearing seat. The swing shaft is rotatably mounted on the bearing seat, and the swing shaft extends longitudinally. The bearing seat of the swing shaft is mounted on the connecting seat. The device is characterized in that the middle section of the compression lever is provided with a slider that can slide along the axial direction of the compression lever. The slider is also provided with a locking component for locking the relative position of the slider and the compression lever during compression. A hinge shaft is provided between the compression head and the slider, and the compression head is suspended below the slider by the hinge shaft. The lower part of the connecting seat is provided with a hook, the hook opening facing upwards, and the connecting seat utilizes... The hook connects to the bed edge component; this cardiopulmonary resuscitation device does not have a vertical guide hole mechanism to limit the compression head to vertical movement only; the connecting seat does not have a locking mechanism to fix the lateral position of the bearing seat relative to the bed edge component, and the bearing seat on the connecting seat can swing left and right relative to the bed edge component; after the hook of the connecting seat hooks onto the bed edge component, the entire cardiopulmonary resuscitation device forms the following three synergistic movable joints: the first movable joint is formed by the compression head swinging left and right relative to the slider and the compression lever around the hinge axis; the second movable joint is formed by the compression lever swinging around the central axis of the swing axis relative to the bearing seat; the third movable joint is formed by the bearing seat swinging left and right relative to the bed edge component above the bed edge component.

[0014] The hook of the connecting seat does not have a clamping bolt for pressing the bed edge component. After the hook hooks onto the bed edge component, the connecting seat can swing left and right around the bed edge component. The third movable joint is a movable joint formed by the connecting seat swinging left and right around the bed edge component.

[0015] The bed edge component is the guardrail of the hospital bed.

[0016] The connector is provided with a lug that protrudes longitudinally; it is also equipped with a clamp for clamping onto the bed edge component and preventing the lug from falling off; when the clamp is clamped onto the bed edge component, part of the space of the clamp is located below the lug.

[0017] The hook and the bed edge component are magnetically attracted to each other.

[0018] The bed in question is a medical transport bed.

[0019] When the hook is attached to the edge of the first horizontal side of the medical transport bed and the vertical distance between the lower end of the pressing head and the bed surface is 20 cm, the horizontal projection of the end of the pressing lever is exposed outside the second horizontal side of the medical transport bed, and the horizontal dimension of the pressing lever part exposed outside the edge of the second horizontal side of the medical transport bed is greater than 10 cm.

[0020] The length of the pressing lever is extendable. In this case, when determining the lateral dimension of the part of the pressing lever that protrudes beyond the second lateral edge of the medical transport bed, the pressing lever should be in its maximum extended state.

[0021] The medical transport bed is a special trolley for ambulances.

[0022] The hinge axis between the press head and the slider can be a universal hinge axis.

[0023] The hospital bed of this utility model is implemented by the following scheme: a hospital bed, wherein the lateral edge of the hospital bed is provided with a bed edge component; characterized in that the bed edge component is also connected to the above-mentioned lightweight lever-type cardiopulmonary resuscitation device.

[0024] When this utility model is in use, the patient lies on the hospital bed, and the rescuer's posture is not parallel to the patient's; for example, the rescuer may be positioned beside the patient's chest and facing the patient's chest. Therefore, the patient's left-right direction may correspond to the rescuer's front-back direction. In this application, the horizontal and vertical directions of the product are defined based on the patient's orientation when the product is in use. The horizontal direction, i.e., the left-right direction, refers to the direction of the patient's body width (i.e., chest width). The vertical direction refers to the length of the hospital bed, i.e., the direction of the patient's height when lying down, i.e., the front-back direction. The vertical direction refers to the direction of the patient's chest thickness.

[0025] Bedside components refer to components located on the left or right edge of a hospital bed. They can be the frame strips along the edge of the bed (referred to as bedside frame strips), the bed rails, or other components located on the left or right edge of the bed.

[0026] The term "first horizontal side" refers to either the left or right side; when the first horizontal side refers to the left side, the second horizontal side refers to the right side; when the first horizontal side refers to the right side, the second horizontal side refers to the left side.

[0027] The reason for describing the relationship between the compression lever and the medical transport bed as "the vertical distance between the lower end of the compression head and the surface of the medical transport bed is that when in use, the patient lies on the surface of the medical transport bed, and the average chest thickness of an ordinary person is about 20 centimeters. Therefore, "the vertical distance between the lower end of the compression head and the surface of the medical transport bed is 20 centimeters" is equivalent to the situation where the compression head is pressed on the chest of an ordinary patient.

[0028] As long as a portion of the clamp is located below the lug, the lug can be prevented from falling down; the entire clamp does not need to be located below the lug. Therefore, this application uses the description "at least a portion of the clamp's spatial position is located below the lug".

[0029] This utility model has the following advantages and effects: I. This utility model allows the pivot seat of the swing shaft to flexibly change position to passively adapt to the positional changes of the compression head. The positional changes of the compression head dominate the lateral positional changes of the swing shaft (pivot seat), and the sternal surface dominates the posture of the compression head. It utilizes horizontal static friction to control the horizontal position of the compression head. This is contrary to traditional structures and concepts, ensuring that the compression head remains essentially tilted and does not shift during compression, maintaining a essentially vertical movement. Specifically: Before compression, the compression head is freely suspended below the slider using a hinge axis. Under the action of the compression head's own weight, the central axis of the compression head (a straight line passing through the center point of the compression head's center of gravity and the center point of the bottom surface of the compression head) is basically kept in a vertical position. If the bottom surface of the compression head is simplified as a plane, then this plane is basically in a horizontal state. Therefore, during the positioning preparation process before the actual compression, when the compression head has not yet contacted but is about to contact the patient's sternum, the bottom surface of the compression head can be in a horizontal position and balanced left and right. Throughout the compression process, although the lateral distance between the compression head and the swing shaft changes with the tilt of the compression lever, the swing shaft itself can flexibly change its lateral position because the pivot seat can swing left and right above the bed frame, and there is almost no resistance in the process of changing the lateral position of the pivot seat and the swing shaft. On the other hand, there is a large pressure and a large contact area between the compression head and the chest, and the compression head is generally made of non-metallic material (such as plastic) with strong anti-slip properties, resulting in a large horizontal static friction between the compression head and the chest. The frictional resistance that causes the compression head to shift laterally relative to the chest is much greater than the resistance that causes the swing shaft to move laterally. In other words, the lateral position of the compression head is not pulled by the swing shaft but is translated. The compression head is clamped between the hinge shaft and the sternum, and both the sternum and the bottom surface of the compression head have a lateral width of several centimeters. The resistance torque of the compression head tilting and turning relative to the sternum (with the pivot point located at the lower corner of the compression head) is also much greater than the resistance torque of the left and right swaying of the bearing seat (including the swing shaft) (even with a weak magnetic or frictional force, the resistance torque of the left and right swaying of the swing shaft is very small). The final result of this competition and cooperation is that the clamping force keeps the bottom of the compression head pressed against the chest, preventing the compression head from tilting due to the swing shaft. The swing shaft and its seat accommodate the compression head, causing the seat to sway left and right relative to the bed frame. This changes the lateral position of the swing shaft. Once the lateral position of the swing shaft has adapted, it will not exert lateral tension or thrust on the compression head (hinged shaft) through the compression lever. The compression lever will not exert lateral tension or thrust on the compression head due to changes in its horizontal projection length. Therefore, because there is no forced lateral force caused by the geometric relationship of the compression device's structure itself, the compression head remains stable. The compression head is only subjected to the downward pressure of the hinge shaft and the vertical upward elastic force of the sternum. Therefore, the posture of the bottom surface of the compression head is mainly determined by the orientation of the chest surface. The chest surface can play an important guiding role in the posture of the bottom surface of the compression head (in traditional techniques, the forced thrust caused by the geometry of the instrument is too strong, and the posture of the chest surface does not have a guiding role in the posture of the bottom surface of the compression head). Therefore, the posture of the compression head can basically remain in close contact with the chest, the compression head can basically remain without tilting left or right, and the contact position of the compression head on the patient's chest can remain unchanged. In summary, the three movable joints of this invention support and cooperate with each other functionally. After the first and second movable joints rotate due to the tilting of the pressing lever, the third movable joint will be forced to rotate. The effect of the three movable joints working together is that during the up-and-down movement of the pressing head, the bottom surface of the pressing head can always remain in contact with the chest, and the pressing head basically maintains a vertical posture without tilting to the left or right or shifting to the right. The combined result of the unchanged position and posture is that the pressing head can maintain a relatively pure vertical up-and-down movement, applying force to the chest evenly and stably with a large contact area.

[0030] Second, furthermore, this utility model utilizes the aforementioned mechanism to ensure that the pressing head remains essentially tilt-free. Therefore, it eliminates the need for a vertical guide hole mechanism to limit the vertical movement of the pressing head. The presence of a vertical guide hole mechanism does not increase the overall size, number of components, or weight of the pressing device, making the entire pressing device compact, easy to install, and achievable by a single person, requiring only a few seconds to begin pressing. In use, simply attach the hook to the bed edge component (i.e., the bed edge component enters the hook's opening) and you can immediately begin pressing downwards. This saves valuable time (in contrast to traditional techniques, where bolts must be tightened forcefully and confirmed to be secure before pressing can begin). Additionally, the rescuer of this utility model does not need to walk to the opposite side of the bed to tighten the bolts. Throughout the compression process, because the hook faces upward and is constantly under upward tension, it prevents the hook from slipping off the bed frame. During the downward pressing phase, the hook is naturally under upward tension. During the upward recovery phase, the patient's chest, due to its elasticity, is in a recovery phase of upward elastic bulging. During this phase, the patient's chest exerts upward pressure on the compression head and the compression lever. This upward force is sufficient to overcome the hook's own slight weight and prevent it from slipping off.

[0031] Third, the hook of this utility model can be installed on the bed rail. Since the rail protrudes above the bed, the installation is more convenient. It can also reduce the vertical size of the entire compression device, making the compression device more compact. In addition, the hook is always exposed in the line of sight of the person performing the compression during the compression process, which is convenient for the person performing the compression to install, control and observe.

[0032] IV. Because this utility model is very easy to install, it only requires a movable hook or slight clamping of the bed edge components, without the need for tightly tightened bolts. The equipment can be installed during the movement of the transport bed, making it particularly suitable for emergency transport procedures. In the preferred embodiment, when the lateral dimension of the pressing lever protruding beyond the second lateral edge of the medical transport bed is greater than 10 cm, medical personnel can quickly follow the transport bed forward while holding the end of the pressing lever with both hands and swinging it up and down to perform chest compressions. During this process, the medical personnel's body orientation can be the same as the direction of the transport bed's movement, making the compression posture quite relaxed and natural. This allows for high-quality chest compressions during intra-hospital transport, eliminating the need for medical personnel to risk jumping onto the transport bed for low-quality compressions.

[0033] Fifth, this utility model is very easy to install. There is no need to move to the other side of the hospital bed to tighten the clamps. One person can install the device. Therefore, it is particularly suitable for ambulance trolleys. Furthermore, the swing end of the pressing lever of the ambulance trolley is close to the seat, allowing paramedics to sit comfortably and easily in the seat of the speeding ambulance to press on the patient without the risk of falling or getting injured. Furthermore, since the length of the compression lever is extendable, it can be temporarily shortened to fit the confined space of an ambulance during chest compressions. When the ambulance is moved from the ambulance to the ground, the lever can be extended, protruding beyond the edge of the transport bed. Medical personnel can then perform chest compressions while walking alongside the transport bed, gripping the end of the lever with both hands. This means that compressions can be performed continuously before and after disembarking (while in existing technologies, manual chest compressions are difficult both before and after disembarking, resulting in few cardiac arrest patients transported by ambulance receiving timely chest compressions). Therefore, this invention will significantly improve the success rate of resuscitation for cardiac arrest patients, saving many lives and benefiting society.

[0034] VI. The presser of this utility model is small in size and simple in shape, which can save more than half of the pressing force, and is easy to carry and store. It can be stored under the hospital bed when not in use.

[0035] VII. In some embodiments of this utility model, it is also possible to use a slight clamping force or magnetic force to assist in positioning the hook. The main purpose is to prevent the hook from falling off and accidentally detaching from the bed edge component during paused pressing. The magnetic force or slight clamping force will not significantly hinder the rotation of the connecting seat relative to the bed edge component. Similarly, a clamp can be used to prevent the lug of the connecting seat from falling off. However, the elastic clamping force of the clamp is not to counteract the upward pulling force and its decomposition force generated during the pressing process of the pressing head on the hook, but only to overcome the weight of the pressing device. Therefore, the required elastic force is very small, and the installation process is easy and time-saving. Attached Figure Description

[0036] Figure 1 This is a schematic diagram illustrating the changes during use of a traditional lever-type cardiopulmonary resuscitation device without a hinged joint on the compression head.

[0037] Figure 2 This is a schematic diagram illustrating the changes in the use of a traditional lever-type cardiopulmonary resuscitation device with a hinged head.

[0038] Figure 3 yes Figure 2 A schematic diagram showing the state of the middle pressing head tilting over.

[0039] Figure 4 This is a schematic diagram of the basic structure of the vertical guide hole mechanism of a lever-type cardiopulmonary resuscitation device.

[0040] Figure 5 This is a schematic diagram of the internal structure of an ambulance compartment and the manual chest compression method.

[0041] Figure 6 This is a three-dimensional structural diagram of the lightweight lever-type cardiopulmonary resuscitation device of Embodiment 1.

[0042] Figure 7 yes Figure 6 The diagram shows the front view of the cardiopulmonary resuscitation device.

[0043] Figure 8 yes Figure 6 A three-dimensional structural diagram of the connecting seat.

[0044] Figure 9 This is a three-dimensional structural diagram of the hospital bed in Example 1.

[0045] Figure 10 This is a schematic diagram illustrating the changes of the cardiopulmonary resuscitation device in use during the implementation of Example 1.

[0046] Figure 11 This is a three-dimensional structural diagram of the lightweight lever-type cardiopulmonary resuscitation device in Embodiment 2.

[0047] Figure 12 This is a front view of the hospital bed in Example 2.

[0048] Figure 13 yes Figure 12 A magnified view of part of D.

[0049] Figure 14 This is a cross-sectional schematic diagram of the connection structure between the bed rail and the cardiopulmonary resuscitation device in Embodiment 2.

[0050] Figure 15 yes Figure 14 A magnified view of part of E in the diagram.

[0051] Figure 16 yes Figure 15 Schematic diagram of the FF section.

[0052] Figure 17 This is a schematic diagram of another installation method for the clip in Embodiment 2.

[0053] Figure 18 This is a three-dimensional structural diagram of the lightweight lever-type cardiopulmonary resuscitation device of Embodiment 3.

[0054] Figure 19 yes Figure 18 The diagram shows the front view of a lightweight lever-type cardiopulmonary resuscitation device.

[0055] Figure 20 This is a front view of the hospital bed in Example 3.

[0056] Figure 21 yes Figure 20 A magnified schematic diagram of part of G.

[0057] Figure 22 This is a schematic diagram illustrating how the hospital bed is used inside an ambulance, as shown in Example 3.

[0058] Figure 23 This is a schematic diagram illustrating how the hospital bed in Example 3 is used during its movement.

[0059] Figure 24 This is a schematic diagram of the bed usage status in Example 4. Detailed Implementation Example 1

[0060] Example 1 is a lightweight lever-type cardiopulmonary resuscitation device and a hospital bed equipped with the lightweight lever-type cardiopulmonary resuscitation device.

[0061] Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the portable lever-type cardiopulmonary resuscitation device of Embodiment 1 includes a compression head 1, a compression lever 2, and a connecting seat 5 for connecting to the edge component of the hospital bed (specifically, the guardrail 71 above the hospital bed frame). The lower part of the connecting seat 5 has a hook 52, with the hook opening of the hook 52 facing upwards (e.g., ...). Figure 7 and Figure 19 (As shown by the middle arrow) Connecting seat 5 connects to guardrail 71 via hook 52. Connecting seat 5 also has a horizontal folding plate 54. Pressing swing rod 2 has a swing shaft 3. Pressing swing rod 2 swings around the central axis of the swing shaft. The swing shaft 3 is located above the hook opening of hook 52. The swing shaft 3 of pressing swing rod is equipped with a bearing seat 4. The swing shaft 3 is rotatably mounted on the bearing seat 4. The extension direction of the swing shaft 3 is longitudinal. The bearing seat 4 of the swing shaft is mounted on connecting seat 5, specifically fixedly welded to the horizontal folding plate 54. The middle section of pressing swing rod 2 has a slider 20. The slider 20 can slide along the axial direction of pressing swing rod 2 to adjust the lateral position. The slider 20 is also equipped with a locking bolt 23 for locking the relative position of slider 20 and pressing swing rod 2 during pressing. A hinge shaft 10 is provided between pressing head 1 and slider 20. Pressing head 1 is suspended below slider 20 by hinge shaft 10. Pressing head 1 is driven up and down by pressing swing rod 2 through slider 20. This cardiopulmonary resuscitation device does not have a vertical guide hole mechanism to limit the compression head to only vertical movement; the hook 52 does not have a clamping bolt for pressing the guardrail 71; the connecting seat does not have a locking mechanism to fix the lateral position of the swing shaft 3 and the bearing seat 4 relative to the guardrail 71; the connecting seat 5 can swing left and right around the guardrail 71; the swinging back and forth of the connecting seat 5 around the guardrail 71 causes the bearing seat 4 on the connecting seat 5 to sway left and right relative to the guardrail 71; after the hook 52 of the connecting seat hooks onto the guardrail 71, the entire cardiopulmonary resuscitation device forms the following three synergistic movable joints: the first movable joint is the movable joint formed by the left and right swing of the compression head 1 around the hinge shaft 10 relative to the slider 20 and the compression swing arm 2; the second movable joint is the movable joint formed by the swinging of the compression swing arm 2 around the central axis of the swing shaft relative to the bearing seat 4; the third movable joint is the movable joint formed by the left and right swing of the connecting seat 5 around the guardrail 71, that is, the movable joint formed by the left and right swaying of the bearing seat 4 above the guardrail 71 relative to the guardrail 71.

[0062] The bed in Embodiment 1 is a fixed bed 7 in a general ward. The fixed bed 7 has guardrails 71 along its lateral edge. The guardrails 71 are also connected to the lightweight lever-type cardiopulmonary resuscitation device of Embodiment 1. When in use, hooks 52 hook onto the guardrails 71 along the edge of the bed. Figure 9 As shown; when not in use, hook 52 detaches from the guardrail 71 of the hospital bed.

[0063] The working process and principle of the above embodiment 1 are as follows: When a patient experiences cardiac arrest in the hospital bed, hook 52 is hooked onto the guardrail 71 of the fixed hospital bed, and the lateral position of the pressing head 1 is adjusted by the slider 20 so that the pressing head 1 is aligned with the patient's sternum 8. Then, the slider 20 and the pressing lever 2 are locked together by the locking bolt 23, that is, the end face of the bolt is used to press the outer circumferential surface of the pressing lever 2, so that the pressing can begin. Before pressing, due to the weight of the pressing head 1 itself, the central axis of the pressing head 1 (such as...) Figure 10 As shown in the BC line, the compression lever 2 should remain in a vertical position (left-right balance). Therefore, during the positioning preparation process, when the compression lever 2 swings downward until the compression head 1 just touches the patient's sternum, the bottom surface of the compression head 1 should be in a horizontal position (achieving left-right balance). Figure 10 As shown in the image above; During compression, the compression head 1 maintains a vertical movement. Although changes in the tilt of the compression lever 2 will alter the lateral distance between the swing shaft 3 and the compression head 1 (including the hinge shaft 10), this only causes the connecting seat 5 to swing left and right around the guardrail 71 (causing the lateral position of the swing shaft 3 to constantly change back and forth), without generating lateral pulling or pushing forces on the slider 20 and the hinge shaft 10. It will neither pull the compression head 1 to rotate around its lower left corner nor force the lateral translation of the compression head 1's coordinate position. The contact position of the compression head 1 on the patient's chest remains unchanged due to the presence of horizontal static friction. Furthermore, the posture of the compression head 1 is not affected by the tilt of the compression lever 2; therefore, the bottom surface of the compression head 1 always maintains a horizontal posture in contact with the sternum 8. Figure 10 As shown. In Figure 10 The diagram from the top to the bottom shows the changes in the pressing process of the lever 2 and the pressing head 1. During this process, the lateral position and posture of the pressing head 1 remain unchanged, while the connecting seat 5 is forced to swing counterclockwise around the guardrail 71, causing the swing shaft 3 and the shaft seat 4 to move to the left. Example 2

[0064] Example 2 is a lightweight lever-type cardiopulmonary resuscitation device and a medical transport bed equipped with the lightweight lever-type cardiopulmonary resuscitation device.

[0065] The difference between the portable lever-type CPR device of Embodiment 2 and the portable lever-type CPR device of Embodiment 1 is mainly that the connecting seat 5 of Embodiment 2 has a longitudinally protruding lug 55, which connects the front and rear sides of the connecting seat 5. Figure 11 , Figure 12 , Figure 13 As shown, a clamp 6 is also provided for clamping onto the guardrail 71 and preventing the lug from falling off. The clamp has a clamping shaft 60. When the clamp 6 is clamped onto the guardrail 71, the longitudinal position of the clamp 6 coincides with the longitudinal position of the lug 55 of the connecting seat 5, and a portion of the space of the clamp 6 is located below the lug 55, as shown. Figure 14 , Figure 15 , Figure 16 As shown.

[0066] The lightweight lever-type cardiopulmonary resuscitation device of Embodiment 2 has the same structure as the lightweight lever-type cardiopulmonary resuscitation device of Embodiment 1, such as... Figure 11 , Figure 12 , Figure 13 As shown.

[0067] The second embodiment of the hospital bed is a medical transport bed 7 capable of transferring patients within a hospital. The medical transport bed 7 has a guardrail 71 along its lateral edge. The guardrail 71 is also connected to the lightweight lever-type cardiopulmonary resuscitation device of the second embodiment. During use, the hook 52 hooks onto the guardrail 71 along the edge of the bed, and the clip 6 is clamped onto the guardrail 71. The longitudinal position of the clip 6 coincides with the longitudinal position of the lug 55 of the connecting seat 5. A portion of the clip 6 is located below the lug 55, therefore the entire connecting seat 5 (including the lug 55) will not fall off during the intervals between compressions. Figure 14 , Figure 15 , Figure 16 As shown. By Figure 15 , Figure 16 It is evident that the elastic clamping force of clip 6 is not intended to counteract the upward pulling force and its decomposition force generated by the lever mechanism during the downward pressing of the pressing head 1 on the connecting seat 5. Therefore, clip 6 does not need to directly clamp the lug 55; it only needs to utilize the spatial position of clip 6 itself to form spatial interference with the downward trajectory of lug 55. Thus, the required elastic force is very small, and the installation process is easy and time-saving (in contrast, in traditional technology, the function of the tightening bolt is to directly counteract the decomposition force of the upward pulling force generated by the lever mechanism during the downward pressing of the pressing head on the horizontal clamping groove. Therefore, the tightening bolt in traditional technology must be tightened very tightly, meaning that the tightening process is laborious and time-consuming). Of course, even if clip 6 clamps lug 55, the frictional force generated by the small elastic force of ordinary clips is not enough to prevent the connecting seat 5 from rotating around the guardrail 71. In addition, in the hospital bed of embodiment two, after clip 6 is clamped on the guardrail 71, it can also be changed so that the entire spatial position of clip 6 is located below lug 55, such as... Figure 17 As shown.

[0068] In the above embodiment 2, the length of the pressing lever 2 can be increased so that when the vertical distance between the lower end of the pressing head 1 and the bed surface of the medical transfer bed 7 is 20 cm, the horizontal projection position of the end of the pressing lever 2 is exposed outside the right side of the medical transfer bed 7, and the lateral dimension of the pressing lever part exposed outside the right side of the medical transfer bed 7 is 20 cm (of course, this length value can also be changed to 11 cm or 30 cm). Example 3

[0069] Example 3 is a lightweight lever-type cardiopulmonary resuscitation device and an ambulance-specific stretcher equipped with the lightweight lever-type cardiopulmonary resuscitation device.

[0070] The differences between the portable lever-type CPR device in Example 3 and the portable lever-type CPR device in Example 1 lie in the following four aspects, such as... Figure 18 , Figure 19 , Figure 20 , Figure 21 , Figure 22 As shown: 1. In Embodiment 3, the connecting seat 5 of the portable lever-type cardiopulmonary resuscitation device is modified to connect to the bed frame 70 of the ambulance trolley. The hook does not have a clamping bolt for pressing the bed frame 70. After the hook 52 of the connecting seat 5 hooks the bed frame 70, the connecting seat 5 can swing left and right around the bottom end of the bed frame 70. When the connecting seat 5 swings back and forth around the bed frame 70, it causes the shaft seat 4 on the connecting seat to sway left and right relative to the bed frame 70. Since the vertical position of the bed frame 70 of the ambulance trolley is lower than the guardrail, the vertical dimension of the connecting seat 5 in Embodiment 3 is larger than that of the connecting seat 5 in Embodiment 1. The vertical distance between the hook 52 and the swing shaft 3 in Embodiment 3 is larger than that in Embodiment 1. The connecting seat 5 in Embodiment 3 does not have a horizontal folding plate. The shaft seat 4 in Embodiment 3 is directly welded to the upper side of the connecting seat 5. II. In Embodiment 3, the bottom of the hook of the portable lever-type cardiopulmonary resuscitation device contains a magnet 61. This magnet 61 and the iron bed frame 70 form a magnetic attraction, equivalent to the hook 52 and the bed frame 70 forming a magnetic attraction. Figure 20 , Figure 21 , Figure 19 As shown; III. The length of the pressing lever 2 in Embodiment 3 is telescopic; the pressing lever 2 is composed of two hollow rods (inner core section 21 and outer sleeve section 22) that are slidably connected, such as... Figure 19 , Figure 20 , Figure 18 As shown, when the outer sleeve 22 slides to the right, the length of the pressing swing arm 2 extends; conversely, it retracts. Figure 20 As shown, when the hook 52 hooks onto the left side of the ambulance trolley 7, the length of the pressing lever 2 is extended to its maximum, and the vertical distance between the lower end of the pressing head 1 and the surface of the ambulance trolley 7 (i.e., Figure 20 When the distance between MN and the center is 20 cm, the horizontal projection of the end of the pressing lever 2 protrudes outside the right side of the ambulance trolley. The lateral dimension of the pressing lever part protruding outside the right edge of the ambulance trolley (i.e., Figure 20 The distance between the RS and the center is 30 centimeters (of course, this length can also be changed to 11 centimeters or 40 centimeters). IV. In Embodiment 3, the middle part of the connecting seat 5 arches outward laterally, as shown in the following figure. Figure 21 Point Q in the diagram arches to the left relative to points U and P, so that when the pendulum axis 3 is directly above the bed edge frame 70, the corner point of the bed edge frame 70 (e.g.) Figure 21 The W point in the diagram will not impede the normal wobbling range of the connecting seat 5.

[0071] The remaining structural aspects of the lightweight lever-type cardiopulmonary resuscitation device in Embodiment 3 are the same as those in Embodiment 1.

[0072] The hospital bed in Embodiment 3 is a special ambulance trolley 7. The ambulance trolley 7 has a side frame 70 along its transverse edge, and the side frame 70 is also connected to the lightweight lever-type cardiopulmonary resuscitation device of Embodiment 3. In use, the hook 52 of the cardiopulmonary resuscitation device hooks onto the side frame 70 of the ambulance trolley, and the magnet 61 of the hook magnetically engages with the side frame 70 of the ambulance trolley. Figure 20 , Figure 21 As shown, the magnetic attraction only generates a weak frictional force, which is insufficient to prevent the connecting seat 5 from swinging left and right around the bottom end of the bed frame 70.

[0073] In Example 3, when used on the ambulance compartment 9, the bed leg 74 is in a horizontal position, and the length of the compression lever 2 can be retracted (because the lateral space of the ambulance compartment is limited, the compression lever needs to be shortened). Medical personnel can sit on the seat 92 to perform compressions, such as... Figure 22 As shown; when the patient is lying on the medical transport bed 7 and being transported to the ambulance, or when the patient is being pushed off the ambulance and into the hospital emergency room, the bed legs 74 are raised to an upright position, allowing the compression lever 2 to extend and protrude beyond the second lateral edge of the ambulance 7. Medical personnel can then quickly follow the ambulance 7 forward while simultaneously grasping the end of the compression lever 2 with both hands and swinging it up and down to perform chest compressions. Figure 23 As shown. In Embodiment 3, the pressing depth can also be controlled by utilizing the cooperation of the floating upright 24 with the right side of the bed edge when necessary, such as... Figure 23 As shown. Example 4

[0074] Example 4 is a fixed hospital bed 7 for use in a ward. The fixed hospital bed 7 has a side frame 70 along its lateral edge, and a lightweight lever-type cardiopulmonary resuscitation device is connected to the side frame 70. The main difference between Example 4 and Example 1 is that the side frame 70 of Example 4 is circular, with a bed board 75 adjacent to it, and the diameter of the side frame 70 is only 0.6 cm larger than the thickness of the bed board. In this case, the cardiopulmonary resuscitation device can still be hooked onto the side frame 70 using the hook 52 with the hook facing upwards and applied pressure. Figure 24 As shown. Embodiment 4 mainly illustrates two issues. First, the hook 52 of the cardiopulmonary resuscitation device of this utility model only needs to slightly hook onto the bed edge component, so it can be applied to most existing hospital beds, meaning that most existing hospital beds can be equipped with the cardiopulmonary resuscitation device of this utility model without modification; Second, the slot of the clamp of the traditional cardiopulmonary resuscitation device cannot face upwards, while the hook of the cardiopulmonary resuscitation device of this utility model can face upwards.

[0075] The structure of the fixed hospital bed in Example 4 is the same as that in Example 1.

[0076] The principle of keeping the pressing head vertical during the use of the above-mentioned Embodiments 2, 3, and 4 is the same as that of Embodiment 1.

[0077] In the above embodiments, the hinge shaft 10 between the pressing head and the slider can be a hinge shaft that rotates around a single axis (commonly known as a straight shaft); of course, the hinge shaft between the pressing head and the slider can also be a universal hinge shaft, which can also allow the pressing head to swing left and right relative to the slider.

Claims

1. A lightweight lever-type cardiopulmonary resuscitation device, comprising a compression head, a compression lever, and a connecting seat for connecting to a bed edge component, wherein the compression lever is provided with a pivot shaft, the pivot shaft is fitted with a bearing seat, the pivot shaft is rotatably mounted on the bearing seat, the pivot shaft extends longitudinally, and the bearing seat of the pivot shaft is mounted on the connecting seat; characterized in that, The middle section of the pressing lever has a slider that can slide along the axis of the pressing lever. The slider also has a locking component to lock the relative position of the slider and the pressing lever during pressing. A hinge shaft is provided between the pressing head and the slider, and the pressing head is suspended below the slider by the hinge shaft. The lower part of the connecting seat has a hook with the hook facing upward. The connecting seat is connected to the bed edge component by the hook. This cardiopulmonary resuscitation device does not have a vertical guide hole mechanism to limit the pressing head to only vertical movement. The connecting seat does not have a locking mechanism to fix the lateral position of the bearing relative to the bed edge component. The bearing on the connecting seat can swing left and right relative to the bed edge component. After the hook of the connecting seat hooks onto the bed edge component, the entire cardiopulmonary resuscitation device forms the following three synergistic movable joints: the first movable joint is formed by the left and right swing of the pressing head relative to the slider and the pressing lever around the hinge shaft; the second movable joint is formed by the swing of the pressing lever relative to the bearing around the central axis of the pivot shaft; the third movable joint is formed by the left and right swing of the bearing above the bed edge component relative to the bed edge component.

2. The portable lever-type cardiopulmonary resuscitation device according to claim 1, characterized in that: The hook of the connecting seat does not have a clamping bolt for pressing the bed edge component. After the hook hooks onto the bed edge component, the connecting seat can swing left and right around the bed edge component. The third movable joint is a movable joint formed by the connecting seat swinging left and right around the bed edge component.

3. A portable lever-type cardiopulmonary resuscitation device according to claim 1, characterized in that: The bed edge component is the guardrail of the hospital bed.

4. A lightweight lever-type cardiopulmonary resuscitation device according to claim 1, 2 or 3, characterized in that: The connector is provided with a lug that protrudes longitudinally; it is also equipped with a clamp for clamping onto the bed edge component and preventing the lug from falling off; when the clamp is clamped onto the bed edge component, part of the space of the clamp is located below the lug.

5. A lightweight lever-type cardiopulmonary resuscitation device according to claim 1, 2 or 3, characterized in that: The hook and the bed edge component form a magnetic attraction.

6. A lightweight lever-type cardiopulmonary resuscitation device according to claim 1, 2 or 3, characterized in that: The bed in question is a medical transport bed.

7. A portable lever-type cardiopulmonary resuscitation device according to claim 6, characterized in that: When the hook is attached to the edge of the first horizontal side of the medical transport bed and the vertical distance between the lower end of the pressing head and the bed surface is 20 cm, the horizontal projection of the end of the pressing lever is exposed outside the second horizontal side of the medical transport bed, and the horizontal dimension of the pressing lever part exposed outside the edge of the second horizontal side of the medical transport bed is greater than 10 cm.

8. A portable lever-type cardiopulmonary resuscitation device according to claim 7, characterized in that: The length of the lever can be extended or retracted by pressing it.

9. A portable lever-type cardiopulmonary resuscitation device according to claim 8, characterized in that: The medical transport bed is a special trolley for ambulances.

10. A lightweight lever-type cardiopulmonary resuscitation device according to claim 1, 2 or 3, characterized in that: The hinge axis between the press head and the slider is a universal hinge axis.

11. A hospital bed, wherein the transverse edges of the bed are provided with bed edge components; characterized in that: The bed frame is also connected to a lightweight lever-type cardiopulmonary resuscitation device as described in any one of claims 1 to 10.

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