A cardiopulmonary resuscitation (CPR) auxiliary device and its usage method

Abstract

This invention discloses a cardiopulmonary resuscitation (CPR) auxiliary device and its usage method, belonging to the field of medical devices. The device includes a fixed plate connected to a mounting bracket and a telescopic sleeve that movably inserts therein. The mounting bracket is connected to a drive device and a reciprocating drive assembly. The drive device drives the telescopic sleeve to reciprocate vertically via the reciprocating drive assembly. A locking assembly and a pressing rod are disposed within the telescopic sleeve. A pressing head is fixedly connected to the lower end of the pressing rod. The locking assembly locks the pressing rod, causing the telescopic sleeve to drive the pressing rod synchronously for pressing. When the locking assembly releases the locking of the pressing rod, the vertical position of the pressing rod can be adjusted. Simultaneously, by controlling the locking and releasing of the pressing rod by the locking assembly, the vertical position of the pressing rod can be flexibly adjusted, effectively improving the convenience of adjusting the height of the pressing head and thus improving rescue efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to a cardiopulmonary resuscitation (CPR) aid device and its usage method. Background Technology

[0002] Cardiopulmonary resuscitation (CPR) devices are a type of equipment that uses machinery to replace human labor in performing chest compressions. Their main function is to control the reciprocating motion of the compression structure, enabling alternating compression and release operations on the patient's sternum.

[0003] Currently, cardiopulmonary resuscitation (CPR) equipment is mainly driven in two ways: pneumatic (using compressed gas to push a piston for compression) and electric (using a motor to drive a robotic arm or pressure plate to complete compression). In terms of transmission, based on the force application mechanism, it can be divided into "piston type" and "bandage type".

[0004] In cardiopulmonary resuscitation (CPR), precise control of compression depth directly determines the resuscitation outcome. The recommended depth for chest compressions in adults is 5–6 cm, or one-third of the anteroposterior diameter of the chest. However, chest wall thickness varies significantly among patients: adult chest wall thickness can range from approximately 10 cm to over 25 cm.

[0005] Existing equipment typically requires medical personnel to adjust the height of the compression head using complex mechanical structures (such as multiple locking bolts, rack and pinion clips, or an integrated lifting platform) to ensure the compression head fits against the patient's chest wall. This process is not only cumbersome and time-consuming, but it can also severely delay the best opportunity for rescue in a race against time.

[0006] Moreover, it is difficult to achieve stepless and precise adjustment. Once the initial position of the compression head fails to precisely match the thickness of the patient's chest, the subsequent mechanically driven compression depth will deviate significantly from the clinically recommended value (5-6 cm for adults). If the initial position is too high, it will result in insufficient compression depth, making it impossible to establish effective artificial circulation, thus seriously affecting the rescue effect. Summary of the Invention

[0007] This invention provides a cardiopulmonary resuscitation (CPR) auxiliary device and its usage method. By connecting a locking component inside a telescopic sleeve, the locking component can lock and release the compression rod, enabling flexible adjustment of the vertical position of the compression rod. This solves the problems in the prior art where the height adjustment of the compression head is inconvenient and the position is difficult to accurately match the patient's chest cavity height, which affects the efficiency and effectiveness of rescue.

[0008] A cardiopulmonary resuscitation (CPR) auxiliary device includes a fixed plate, a mounting bracket fixedly connected to the fixed plate, and a telescopic sleeve that is movably inserted therethrough. The mounting bracket is connected to a drive device and a reciprocating drive assembly. The drive device drives the telescopic sleeve to reciprocate vertically through the reciprocating drive assembly. A locking assembly and a pressing rod are provided inside the telescopic sleeve. A pressing head is fixedly connected to the lower end of the pressing rod. The pressing rod is locked by the locking assembly, so that the telescopic sleeve drives the pressing rod to move synchronously to achieve pressing. When the locking assembly releases the locking state of the pressing rod, the vertical position of the pressing rod can be adjusted. As a preferred embodiment of the present invention, the locking assembly includes a retaining sleeve, the side wall of which has a plurality of retaining holes, and ball bearings are installed in the retaining holes; the pressing rod is sleeved inside the retaining sleeve, and the lower end of the telescopic sleeve has a flared structure with a gradually increasing inner diameter. By adjusting the assembly, the retaining sleeve is driven to move axially relative to the telescopic sleeve, and the inclined surface of the flared structure pushes the ball bearings, so that the ball bearings clamp the pressing rod, thereby locking the pressing rod.

[0009] As a preferred embodiment of the present invention, the inner wall of the telescopic sleeve has a stepped portion, the outer wall of the retaining bushing is fitted with an elastic element, and the upper end of the retaining bushing has a flange, with the lower end of the elastic element abutting against the stepped portion and the upper end abutting against the flange. By pushing the retaining bushing upward by the elastic element, the ball is kept in a clamping state against the pressing rod.

[0010] As a preferred embodiment of the present invention, the pressing rod is provided with an arc-shaped groove that mates with the ball bearing in the axial direction; the inclined surface of the flared structure is provided with a limiting groove that mates with the ball bearing.

[0011] As a preferred embodiment of the present invention, the adjustment assembly includes a support frame fixedly connected to the mounting bracket, the support frame being connected to a plurality of connecting rods, and an annular plate corresponding to the position of the retaining sleeve being connected through the connecting rods; a plurality of electromagnets are fixedly connected to the lower surface of the annular plate, and a permanent magnet opposite to the position of the electromagnets is fixedly connected to the upper end face of the retaining sleeve, and when the electromagnets are in the pass, they repel the magnetic poles of the permanent magnets, driving the retaining sleeve to move downward, thereby releasing the locking state of the pressing rod.

[0012] As a preferred embodiment of the present invention, the reciprocating drive assembly includes an end face cam rotatably connected to the mounting bracket, a connecting shaft is fixedly connected to the side wall of the telescopic sleeve, the connecting shaft is rotatably connected to a roller that abuts against the working surface of the end face cam, and a compression spring is installed between the connecting shaft and the fixed plate. The end face cam rotates and pushes the telescopic sleeve to move axially through the roller, and the compression spring is used to reset the telescopic sleeve.

[0013] As a preferred embodiment of the present invention, the driving device includes a drive motor fixedly connected to the mounting bracket and a driven wheel fixedly connected to the end face cam, and the output end of the drive motor is fixedly connected to a driving wheel that is drivenly connected to the driven wheel.

[0014] As a preferred embodiment of the present invention, the end face cam has two push stroke sections and two return stroke sections, and the push stroke sections and return stroke sections are spaced apart from each other and evenly distributed along the circumferential direction of the end face cam.

[0015] As a preferred embodiment of the present invention, there are two connecting shafts, which are symmetrically arranged relative to the telescopic sleeve; a number of connecting columns are fixedly connected between the mounting bracket and the fixing plate, and two connecting columns are corresponding to the position of the connecting shaft, and both of these connecting columns are fitted with compression springs; one end of the connecting shaft is connected to a connecting plate, and the connecting plate and the connecting column are movably interlocked, and the upper end of the compression spring abuts against the connecting plate.

[0016] The method of using cardiopulmonary resuscitation (CPR) assistive devices, applied to the aforementioned CPR assistive devices, includes the following steps: Step 1: Install the equipment. Secure the cardiopulmonary resuscitation (CPR) aid to the upper part of the chest of the patient who is lying flat, ensuring that the compression head is directly above the compression point. Step 2: Adjust the starting height of the compression head. Drive the retaining sleeve downward by adjusting the component to release the locking state of the compression lever. Pull down the compression head so that it contacts the patient's chest compression point. Step 3: Start chest compressions. Activate the drive mechanism to drive the telescopic sleeve in a vertical reciprocating motion. The telescopic sleeve drives the compression rod to move synchronously, and the compression head is used to perform chest compressions on the patient. The present invention has the following beneficial effects: 1. This invention features a locking assembly and a pressing rod within a telescopic sleeve. By controlling the locking assembly to lock and release the pressing rod, the vertical position of the pressing rod can be flexibly adjusted, effectively improving the convenience of adjusting the height of the pressing head and thus enhancing rescue efficiency. Furthermore, the height of the pressing head can be adjusted by pulling, allowing it to be positioned close to the compression point on the patient's chest cavity. This ensures the height of the pressing head precisely matches the patient's chest cavity height, effectively guaranteeing compression depth and improving rescue effectiveness.

[0017] 2. The present invention drives the end face cam to rotate through a driving device. The working surface of the end face cam abuts against the roller connected to the telescopic sleeve. The rotation of the end face cam pushes the telescopic sleeve to move axially. Compared with the crank-slider mechanism, the structure of the present invention is more compact and the overall volume can be effectively reduced, which is conducive to portable use. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a cardiopulmonary resuscitation (CPR) auxiliary device provided by the present invention; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 2 The front view; Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 Sectional view at point AA; Figure 6 for Figure 4 Sectional view at point BB; Figure 7 Exploded view of the support frame, telescopic sleeve, locking assembly, and pressing rod; Figure 8 A schematic diagram of the structure for mounting brackets and end face cams; Figure 9 A schematic diagram of the telescopic sleeve, locking assembly, and pressing rod; Figure 10 This is an exploded view of the telescopic sleeve structure; Figure 11 This is an exploded view of the locking assembly. Figure 12 This is a schematic diagram of the structure when adjusting the length of the pressure rod; Figure 13 for Figure 12 A half-section view; Figure 14 for Figure 12 A schematic diagram of the structure when the middle pressing lever is pressed; Figure 15 A schematic diagram of the structure of a cardiopulmonary resuscitation (CPR) auxiliary device after the addition of a cover. Explanation of reference numerals in the attached figures: 1-Fixed plate, 2-Mounting bracket, 3-Telescopic sleeve, 4-Locking assembly, 5-Pressing rod, 6-End face cam, 101-Connecting column, 102-Cover, 201-Support frame, 202-Connecting rod, 203-Annular plate, 204-Electromagnet, 205-Drive motor, 206-Driving wheel, 301-Flare structure, 302-Step section, 303-Limiting groove, 304-Connecting shaft, 305-Roller, 306-Compression spring, 307-Connecting plate, 401-Retaining bushing, 402-Ball, 403-Elastic element, 404-Flange, 405-Permanent magnet, 501-Pressing head, 502-Arc-shaped groove, 601-Driven wheel, 602-Push section, 603-Return section. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] To address the aforementioned technical problems, this invention provides a cardiopulmonary resuscitation (CPR) auxiliary device and its usage method. The technical solution of this invention will be described in detail below with reference to the accompanying drawings and specific embodiments. like Figures 1 to 4 As shown, an embodiment of the present invention provides a cardiopulmonary resuscitation (CPR) auxiliary device, including a fixation plate 1, a back plate, and two side plates. In use, the back plate is placed on the patient's back, and the lower ends of the two side plates are connected to the back plate, while the upper ends are connected to both ends of the fixation plate 1 (the back plate and side plates are existing technologies, and the specific connection method and usage method can be referred to the Lucas CPR machine, which will not be described in detail in this embodiment).

[0021] Unlike existing technologies, the core design concept of this invention is to set the reciprocating motion component (telescopic sleeve 3) that provides the pressing power and the execution component (pressing rod 5 and pressing head 501) that directly contact the patient as a split structure that can slide and lock relative to each other, thereby allowing the initial height of the pressing head 501 to be adjusted independently and quickly without changing the position of the main unit of the device.

[0022] Specifically, the fixed plate 1 is fixedly connected to the mounting bracket 2, which provides support for the core transmission components of the equipment. To ensure the stability and rigidity of the equipment operation, two to six connecting columns 101 are fixedly connected between the mounting bracket 2 and the fixed plate 1. These connecting columns 101 not only firmly support the mounting bracket 2 above the fixed plate 1, forming a stable frame structure, but also provide a mounting and positioning foundation for the subsequent return spring assembly.

[0023] A through hole is provided on the fixed plate 1, and a telescopic sleeve 3 is movably inserted into the through hole. The telescopic sleeve 3 can reciprocate vertically within the through hole. A drive device and a reciprocating drive assembly are integrated on the mounting bracket 2. The drive device provides power, and the reciprocating drive assembly converts the rotational motion into the vertical reciprocating motion of the telescopic sleeve 3, thereby simulating the action of manual chest compressions.

[0024] Existing cardiopulmonary resuscitation (CPR) equipment typically uses crank-slider or complex linkage mechanisms for transmission, which can achieve reciprocating motion. However, the above structures result in bulky equipment with poor portability. Furthermore, the poor dynamic balance of these structures can lead to significant vibration of the equipment during use, affecting its stability.

[0025] To achieve a more compact structure and improved stability in the use of cardiopulmonary resuscitation (CPR) equipment, this invention employs a compact end-face cam 6-speed transmission scheme. This reduces the equipment's size, making it easier to carry and deploy on-site. The specific implementation method is as follows: like Figure 3 and Figure 8 As shown, the reciprocating drive assembly includes an end face cam 6 rotatably connected to the mounting bracket 2. The end face cam 6 is rotatably connected to the mounting bracket 2 via a bearing. The drive device includes a drive motor 205 fixedly connected to the mounting bracket 2, and a drive wheel 206 is fixedly attached to the output end of the drive motor 205. A driven wheel 601 is coaxially fixedly connected to the outer wall of the end face cam 6. The drive wheel 206 and the driven wheel 601 are connected by gear transmission, or by belt or chain transmission. When the drive motor 205 rotates, it drives the end face cam 6 to rotate, thereby driving the telescopic sleeve 3 to move axially using the working surface of the end face cam 6. Compared with the traditional crank-slider mechanism, this transmission method of end face cam 6 and roller 305 results in a shorter transmission chain and a more compact structural layout, effectively reducing the space occupied by the equipment in the vertical and horizontal directions and significantly improving the portability of the equipment.

[0026] However, in the above scheme, if the working surface of the end face cam 6 directly drives the end face of the telescopic sleeve 3 to contact, the friction between the end face cam 6 and the telescopic sleeve 3 will be large during rotation, which will lead to increased wear and affect the overall service life. To address this, a connecting shaft 304 is fixedly connected to the side wall of the telescopic sleeve 3, and a roller 305 is rotatably connected to the end of the connecting shaft 304. The roller 305 can be a rolling bearing, and it abuts against the working surface of the end face cam 6, thereby changing sliding friction into rolling friction and ensuring the overall service life.

[0027] In addition, if the end face cam 6 mentioned above has only one push stroke section, the force on the end face cam 6 and the telescopic sleeve 3 will always deviate from the rotation center, resulting in an imbalance of force on the end face cam 6 and the telescopic sleeve 3. This may lead to abnormal wear caused by deformation or uneven force during long-term use.

[0028] like Figure 8 As shown, in order to improve the force balance of the end face cam 6 and the telescopic sleeve 3 during operation, and to ensure the smooth movement and uniform force distribution of the telescopic sleeve 3 when subjected to lateral force, the working surface of the end face cam 6 is designed to have two push stroke sections 602 and two return stroke sections 603. The two push stroke sections 602 and the two return stroke sections 603 are spaced apart from each other and are evenly distributed along the circumference of the end face cam 6.

[0029] At the same time, such as Figure 7 , Figure 12 and 14As shown, the number of connecting shafts 304 is preferably two, and they are symmetrically arranged relative to the axis of the telescopic sleeve 3. With the above structural design, during the rotation of the end face cam 6, the two push sections 602 simultaneously drive the rollers 305 on the connecting shafts 304 on both sides of the telescopic sleeve 3. As the end face cam 6 rotates, the rollers 305 simultaneously enter the return section 603 of the end face cam 6, so that the connecting shafts 304 on both sides of the telescopic sleeve 3 are always subjected to synchronous force. Thus, this symmetrical force application structural design effectively avoids uneven wear and jamming of the telescopic sleeve 3 during movement, and improves the reliability and durability of the mechanical transmission.

[0030] As for the extension frequency of the telescopic sleeve 3, it can be adjusted by increasing the number of push sections 602 and return sections 603, or by matching the transmission ratio of the drive wheel 206 and the driven wheel 601 with the speed of the drive motor 205, so as to meet the compression frequency during cardiopulmonary resuscitation.

[0031] The above-described embodiments enable the telescopic sleeve 3 to perform smooth reciprocating motion driven by the end face cam 6. However, after the telescopic sleeve 3 is driven to move axially by the end face cam 6, the telescopic sleeve 3 needs to be able to automatically reset, and the roller 305 needs to always be in contact with the working surface of the end face cam 6.

[0032] like Figure 6 , Figure 9 and Figure 10 As shown, in this embodiment, a compression spring 306 is installed between the connecting shaft 304 and the fixing plate 1, and the elastic force of the compression spring 306 is used to make the telescopic sleeve 3 automatically reset.

[0033] Specifically, the positions of the two connecting posts 101 below the mounting bracket 2 correspond to the two connecting shafts 304. A connecting plate 307 is fixedly connected to one end of the connecting shaft 304. The connecting plate 307 is movably sleeved on the corresponding connecting post 101, and the compression spring 306 is sleeved on the connecting post 101, with its upper end abutting against the lower surface of the connecting plate 307.

[0034] To facilitate installation, the connecting plate 307 is connected to a bushing structure, which connects to the connecting shaft 304. The connecting plate 307 is also equipped with a linear bearing, which cooperates with the connecting column 101 to prevent wear between the connecting plate 307 and the connecting column 101.

[0035] like Figure 14As shown, the working surface of the push section 602 of the end face cam 6 presses the roller 305 downward, thereby pushing the telescopic sleeve 3, which is fixedly connected to the connecting shaft 304, to move downward against the elastic force of the compression spring 306 and perform a pressing action. At this time, the compression spring 306 is compressed. When the end face cam 6 rotates to the point where the roller 305 is in the return section 603, the compression spring 306 releases its elastic force and pushes the telescopic sleeve 3 upward to reset, thereby realizing the automatic reset of the telescopic sleeve 3 and completing one pressing cycle.

[0036] Existing equipment typically requires medical staff to adjust the height of the compression head using complex mechanical structures (such as multiple locking bolts, rack and pinion clips, or an integrated lifting platform) to ensure the compression head fits against the patient's chest wall. This process is not only cumbersome and time-consuming, but also makes it difficult to achieve stepless and precise adjustments.

[0037] To address the issue of adjusting the position of the pressing rod 5 in existing technologies, a pressing head 501 is fixedly connected to the lower end of the pressing rod 5. The pressing rod 5 is locked by the locking assembly 4, causing the telescopic sleeve 3 to move synchronously with the pressing rod 5, thus achieving pressing. Furthermore, when the locking assembly 4 releases the locking state of the pressing rod 5, the vertical position of the pressing rod 5 can be adjusted. The specific solution is as follows: like Figures 5-7 and Figures 9-11 As shown, the telescopic sleeve 3 is equipped with a locking assembly 4 and a pressing rod 5. The locking assembly 4 is built into the internal cavity of the telescopic sleeve 3. Specifically, the locking assembly 4 includes a retaining bushing 401. The retaining bushing 401 has several (e.g., 3 or 4) retaining holes distributed circumferentially on its side wall. A ball bearing 402 is movably installed in each retaining hole. The pressing rod 5 is slidably sleeved inside the retaining bushing 401. The lower inner wall of the telescopic sleeve 3 is machined into a flared structure 301 with an inner diameter that gradually increases from top to bottom.

[0038] This invention achieves locking and releasing of the pressing rod 5 by changing the radial degree of freedom of the ball bearing 402, solving the inconvenience of adjusting the height in the prior art that requires tools or the cooperation of both hands. When the pressing rod 5 needs to be locked, the bushing 401 tends to move upward under the thrust of the elastic element 403. At this time, the inclined surface of the flared structure 301 will push the ball bearing 402 inward. After being subjected to force, the ball bearing 402 presses tightly against the outer wall of the pressing rod 5, generating a huge frictional force, thereby combining the pressing rod 5 and the telescopic sleeve 3 into a whole, realizing the rigid transmission of pressing force. When the telescopic sleeve 3 moves downward during the pressing process, it drives the locking component 4 and the pressing rod 5 to move downward simultaneously. When the pressing rod 5 is subjected to upward resistance, it will generate an upward force on the locking component 4 through the ball bearing 402. This will cause the inclined surface of the flared structure 301 to push the ball bearing 402 further inward, so that the ball bearing 402 will further clamp the pressing rod 5, thereby achieving a self-locking effect and ensuring the smooth progress of the pressing action.

[0039] When the height of the pressure head 501 needs to be adjusted, i.e., the vertical position of the pressure lever 5 needs to be adjusted, the external adjustment component drives the retaining sleeve 401 to move downwards. The ball bearing 402 moves downwards and enters a wider area of ​​the flared structure 301. At this time, the squeezing force of the ball bearing 402 on the pressure lever 5 disappears, and the pressure lever 5 can freely extend and retract under gravity or manual pulling. This structural design allows medical staff to complete the height adjustment by pulling the pressure head with only one hand, achieving a balance between ease of operation and precise positioning.

[0040] like Figure 5 and Figure 11 As shown, to ensure the self-locking reliability of the locking assembly 4 in the locked state of the pressing rod 5, another preferred embodiment of this application is that the inner wall of the telescopic sleeve 3 has a stepped portion 302. An elastic element 403 (preferably a compression spring) is fitted on the outer wall of the retaining sleeve 401, and the upper end of the retaining sleeve 401 has an outwardly extending flange 404. The lower end of the elastic element 403 abuts against the stepped portion 302, and the upper end abuts against the lower surface of the flange 404.

[0041] In its natural state, the elastic element 403 always applies an upward thrust to the retaining sleeve 401, keeping the ball 402 constantly compressed by the flared structure 301, thus maintaining the clamped and locked state of the pressing lever 5. This "normally closed" locking design ensures that even in the event of an accidental power outage or electromagnet failure, the pressing lever 5 remains firmly locked in the set position, avoiding the risk of sudden depth changes due to locking failure during pressing, and greatly improving the safety of the equipment.

[0042] Since the above solution uses a ball bearing 402 to clamp the pressing rod 5, the overall load-bearing capacity is limited because the contact point between the ball bearing 402 and the pressing rod 5 is point contact. Furthermore, the positioning of the locking assembly 4 and the pressing rod 5 in the circumferential direction is insufficient. To further enhance the axial load-bearing capacity and circumferential positioning accuracy during locking, this application further improves the solution based on the above implementation method, specifically as follows: like Figure 7 and Figure 10As shown, the axial surface of the pressing rod 5 has an arc-shaped groove 502 that matches the shape and position of the ball 402. When the ball 402 is squeezed and clamped, part of the ball will be embedded in the arc-shaped groove 502. At the same time, a limiting groove 303 that matches the ball 402 is also provided on the inclined surface of the flared structure 301. The technical effects of this improvement are: on the one hand, the cooperation between the ball and the arc-shaped groove 502 can increase the contact area, which not only provides friction but also provides positive mechanical limiting, preventing the pressing rod 5 from axially slipping when subjected to a large load pressing reaction force; on the other hand, the limiting groove 303 plays a circumferential positioning role for the ball 402, preventing the ball 402 from rolling and deviating randomly during the squeezing process, and ensuring the consistency and stability of the locking action.

[0043] The above-described design allows the pressing action of the pressing rod 5 to be driven by the telescopic sleeve 3, and the vertical position of the pressing rod 5 to be flexibly adjusted. However, the above design uses an elastic element 403 to always apply an upward thrust to the "normally closed" locking design of the retaining sleeve 401, which may affect the convenience of adjustment. In order to ensure that the locking component 4 can release the pressing rod 5 with simple operation to meet the purpose of quick adjustment, this application also provides an adjustment component, which drives the locking component 4 to move to release the pressing rod 5.

[0044] Specifically, such as Figure 2 , Figures 6-8 and Figure 13 As shown, the adjustment assembly includes a support frame 201 fixedly connected to the mounting bracket 2. The support frame 201 is connected to the mounting bracket 2 via a connecting column. The support frame 201 is connected to two to four connecting rods 202. The lower end of the connecting rod 202 extends into the telescopic sleeve 3 and is connected to an annular plate 203 by welding or screws. The annular plate 203 corresponds to the position of the retaining bushing 401.

[0045] One way to move the locking assembly 4 is as follows: the connecting rod 202 and the support frame 201 are interlocked. By pressing down on the connecting rod 202, the annular plate 203 presses down on the retaining sleeve 401, driving the retaining sleeve 401 to move downward a short distance. The downward movement of the retaining sleeve 401 causes the ball bearing 402 to move downward as well, escaping the squeezing restraint of the inclined surface of the flared structure 301, thereby instantly releasing the locking state of the pressing rod 5.

[0046] Another embodiment of the drive locking component 4 in this application is that four electromagnets 204 are fixedly connected to the lower surface of the annular plate 203, and a permanent magnet 405 opposite to the position of the electromagnets 204 is fixedly connected to the upper end face of the retaining sleeve 401.

[0047] When height adjustment is required, medical staff energize the electromagnet 204 via a control switch. At this time, the magnetic field generated by the electromagnet 204 has opposite polarity to the magnetic field of the permanent magnet 405, producing a repulsive electromagnetic force. This repulsive force is sufficient to overcome the thrust of the elastic element 403, driving the retaining sleeve 401 to move downwards a short distance. The downward movement of the retaining sleeve 401 causes the ball bearing 402 to move downwards as well, disengaging from the squeezing restraint of the inclined surface of the flared structure 301, thus instantly releasing the locking state of the pressing lever 5. At this point, medical staff only need to gently pull down the pressing head 501 to extend it unimpeded to the position where it contacts the patient's chest wall. After releasing the pressing head 501 and disconnecting the power supply to the electromagnet 204, the elastic element 403 resets, pushing the retaining sleeve 401 upwards, and the ball bearing 402 is once again squeezed and locked onto the pressing lever 5, completing the height adjustment.

[0048] This non-contact unlocking technology, which uses electromagnetic repulsion, not only avoids the complex design and wear problems of mechanical linkages, but also has a fast response speed and flexible control method. It can be easily integrated with wired or wireless control buttons, making it convenient to operate in the tense environment of an emergency scene.

[0049] After the height adjustment is completed, the pressing rod 5 and the telescopic sleeve 3 become a rigid whole again. After the drive motor 205 is started, the end face cam 6 pushes the telescopic sleeve 3 downward. At this time, the locking assembly 4 transmits power to the pressing rod 5 without loss, and finally performs precise compression on the patient's chest cavity through the pressing head 501.

[0050] And, as Figure 3 and Figure 6 As shown, to adapt to harsh environments outside the hospital or during transport, an end cap 503 is fixedly connected to the lower end of the telescopic sleeve 3. The end cap 503 slides with the pressing rod 5, allowing the pressing rod 5 to pass through the end cap 503. A retractable dust cover (such as an accordion cover) is installed between the end cap 503 and the pressing head 501. This design effectively prevents external dust and liquids from splashing into the telescopic sleeve 3, protecting the precision locking components 4 and improving the durability and reliability of the equipment in complex environments.

[0051] In addition, such as Figure 15 As shown, a cover 102 can be installed on the outside of the entire drive unit and reciprocating drive assembly. The cover 102 is fixed to the fixing plate 1 with screws, which serves to protect the internal transmission components and reduce noise.

[0052] This invention also provides a method for using the aforementioned cardiopulmonary resuscitation (CPR) resuscitation aid, which perfectly embodies the design intent of this invention—to quickly and accurately adjust the position of the compression head 501. Based on the specific implementation of the aforementioned CPR resuscitation aid, the method includes the following steps: Step 1: Install the device. Place the device above the chest cavity of the patient lying flat, and adjust the position of the device so that the compression head 501 is directly aligned with the standard compression point on the lower half of the sternum on a horizontal plane. In this step, since the height of the compression head 501 has not yet been adjusted, there is a large gap between the compression head 501 and the patient's chest cavity.

[0053] Step 2: Adjust the starting height of the pressing head 501. The operator presses the control button on the equipment or the unlock button on the remote control, so that the electromagnet 204 in the adjustment component is energized, generating a repulsive force to drive the retaining sleeve 401 to move down, instantly releasing the locking state of the pressing rod 5.

[0054] While keeping the unlock button pressed, the operator uses their other hand to pinch the compression head 501 and pull it downwards. Since the locking component has been released, the compression lever 5 can be easily and smoothly pulled out of the telescopic sleeve 3 until the lower surface of the compression head 501 just lightly touches the patient's chest compression point.

[0055] At this point, releasing the unlock button or pressing the button again de-energizes the electromagnet 204, causing the elastic element 403 to push the retaining sleeve 401 back to its original position, and the ball bearing 402 to lock the pressing lever 5 securely again. This technical step solves the problems of cumbersome adjustment and inaccurate positioning in existing equipment. Through extremely simple operation of "one-button unlock, one-handed pull, and release to lock," it achieves a "zero-gap" precise match between the pressing head and the patient's chest cavity thickness, laying a decisive foundation for subsequent precise control of the compression depth.

[0056] Step 3: Initiate chest compressions. After confirming the device is securely fixed and the compression head 501 is in the correct starting position, start the drive motor 205. The drive unit drives the telescopic sleeve 3 to reciprocate vertically via the reciprocating drive assembly. Since the compression lever 5 is now locked onto the telescopic sleeve 3 by the locking assembly 4, the precise stroke of the telescopic sleeve 3 (e.g., 5-6 cm) is transmitted to the compression head 501 without loss, thereby performing standard chest compressions with constant depth and uniform force on the patient's chest cavity. Because the initial height is precisely aligned with the chest wall, the depth of each compression can accurately reach the preset value, preventing insufficient compression due to initial gaps and excessive compression due to over-pre-compression, significantly improving the success rate of cardiopulmonary resuscitation.

[0057] In summary, compared with existing technologies, the cardiopulmonary resuscitation (CPR) auxiliary device and method provided by this invention, through its innovative split-type compression lever 5 design and electromagnetic unlocking and locking assembly 4 based on ball bearings 402 and a flared bevel 302, achieves rapid, stepless adjustment and precise matching of the compression start height with one hand. Simultaneously, the use of a symmetrical double-stroke end-face cam 6 ensures efficient and stable high-frequency compressions while maintaining a compact structure and portability. This invention improves existing CPR devices in multiple dimensions, including deployment efficiency, ease of operation, compression accuracy, and device portability, demonstrating significant convenience and practicality.

[0058] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A cardiopulmonary resuscitation (CPR) auxiliary device, characterized in that, It includes a fixed plate (1), which is fixedly connected to a mounting bracket (2), and a telescopic sleeve (3) that is movably inserted; The mounting bracket (2) is connected to a drive device and a reciprocating drive assembly. The drive device drives the telescopic sleeve (3) to reciprocate in the vertical direction through the reciprocating drive assembly. The telescopic sleeve (3) is provided with a locking assembly (4) and a pressing rod (5). The lower end of the pressing rod (5) is fixedly connected to a pressing head (501). The pressing rod (5) is locked by the locking assembly (4), so that the telescopic sleeve (3) drives the pressing rod (5) to move synchronously and press. When the locking assembly (4) releases the locking state of the pressing rod (5), the vertical position of the pressing rod (5) can be adjusted.

2. The cardiopulmonary resuscitation auxiliary device as described in claim 1, characterized in that, The locking assembly (4) includes a retaining bushing (401), the side wall of which is provided with a plurality of retaining holes, and ball bearings (402) are installed in the retaining holes. The pressing rod (5) is sleeved inside the retaining sleeve (401). The lower end of the telescopic sleeve (3) has a flared structure (301) with a gradually increasing inner diameter. The retaining sleeve (401) is driven to move axially relative to the telescopic sleeve (3) by the adjusting component. The inclined surface of the flared structure (301) pushes the ball (402) so that the ball (402) clamps the pressing rod (5) and locks the pressing rod (5).

3. The cardiopulmonary resuscitation auxiliary device as described in claim 2, characterized in that, The inner wall of the telescopic sleeve (3) has a stepped portion (302), the outer wall of the retaining bushing (401) is fitted with an elastic element (403), and the upper end of the retaining bushing (401) has a flange (404). The lower end of the elastic element (403) abuts against the stepped portion (302), and the upper end abuts against the flange (404). By pushing the retaining bushing (401) upward by the elastic element (403), the ball (402) is kept in a clamping state against the pressing rod (5).

4. The cardiopulmonary resuscitation auxiliary device as described in claim 2 or 3, characterized in that, The pressing rod (5) has an arc-shaped groove (502) axially formed to cooperate with the ball (402); the inclined surface of the flared structure (301) has a limiting groove (303) that cooperates with the ball (402). The lower end of the telescopic sleeve (3) is fixedly connected to an end cap (503) that is compatible with the pressing rod (5), and a dust cover is installed between the end cap (503) and the pressing head (501).

5. The cardiopulmonary resuscitation auxiliary device as described in claim 2 or 3, characterized in that, The adjustment assembly includes a support frame (201) fixedly connected to the mounting bracket (2), the support frame (201) is connected to a plurality of connecting rods (202), and an annular plate (203) corresponding to the position of the retaining bushing (401) is connected through the connecting rods (202). A number of electromagnets (204) are fixedly connected to the lower surface of the annular plate (203). A permanent magnet (405) opposite to the position of the electromagnet (204) is fixedly connected to the upper end face of the retaining sleeve (401). When the electromagnet (204) is in the passage, it repels the magnetic pole of the permanent magnet (405), driving the retaining sleeve (401) to move down, thereby releasing the locking state of the pressing rod (5).

6. The cardiopulmonary resuscitation auxiliary device as described in claim 1, characterized in that, The reciprocating drive assembly includes an end face cam (6) rotatably connected to the mounting bracket (2). A connecting shaft (304) is fixedly connected to the side wall of the telescopic sleeve (3). A roller (305) that abuts against the working surface of the end face cam (6) is rotatably connected to the connecting shaft (304). A compression spring (306) is installed between the connecting shaft (304) and the fixing plate (1). The end face cam (6) rotates and pushes the telescopic sleeve (3) axially through the roller (305), and the compression spring (306) is used to reset the telescopic sleeve (3).

7. The cardiopulmonary resuscitation auxiliary device as described in claim 6, characterized in that, The drive device includes a drive motor (205) fixedly connected to the mounting bracket (2) and a driven wheel (601) fixedly connected to the end face cam (6). The output end of the drive motor (205) is fixedly connected to a drive wheel (206) that is connected to the driven wheel (601) for transmission.

8. The cardiopulmonary resuscitation auxiliary device as described in claim 6 or 7, characterized in that, The end face cam (6) has two push stroke sections (602) and two return stroke sections (603), and the push stroke sections (602) and return stroke sections (603) are spaced apart from each other and are evenly distributed along the circumference of the end face cam (6).

9. The cardiopulmonary resuscitation auxiliary device as described in claim 8, characterized in that, There are two connecting shafts (304), which are symmetrically arranged relative to the telescopic sleeve (3); a number of connecting columns (101) are fixedly connected between the mounting bracket (2) and the fixing plate (1), and two connecting columns (101) are corresponding to the connecting shafts (304), and both of these connecting columns (101) are fitted with compression springs (306). One end of the connecting shaft (304) is connected to a connecting plate (307), the connecting plate (307) and the connecting column (101) are movably interlocked, and the upper end of the compression spring (306) abuts against the connecting plate (307).

10. The method of using cardiopulmonary resuscitation (CPR) auxiliary equipment, characterized in that, The device applied to the cardiopulmonary resuscitation (CPR) assistive device as described in any one of claims 1-9 includes the following steps: Step 1: Install the equipment. Fix the cardiopulmonary resuscitation (CPR) aid above the chest cavity of the patient who is lying flat, and make sure that the compression head (501) is directly above the compression point. Step 2: Adjust the starting height of the compression head (501), drive the retaining sleeve (401) downward by adjusting the component, release the locking state of the compression rod (5), and pull down the compression head (501) so that the compression head (501) contacts the patient's chest compression point; Step 3: Start pressing, start the drive device, use the drive component to drive the telescopic sleeve (3) to perform vertical reciprocating motion, drive the pressing rod (5) to move synchronously through the telescopic sleeve (3), and use the pressing head (501) to press and rescue the patient.

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