Cardio-pulmonary resuscitation device

Abstract

The embodiment of the utility model provides a cardio-pulmonary resuscitation device. The cardio-pulmonary resuscitation device comprises a motor assembly, a lead screw, a nut, a push rod assembly, a first bearing, a guide sleeve and a connecting structure, the push rod assembly comprises a push rod body and a pressing structure, the push rod body is connected with the nut, and the push rod body sleeves the periphery of the lead screw; the first bearing surrounds the periphery of the connecting structure and is located on the side, facing the pressing structure, of the rotor in the axial direction. The guide sleeve sleeves the periphery of the push rod main body; the push rod assembly has an initial contraction position, at the initial contraction position, the orthographic projection of the nut and the orthographic projection of the stator on any plane parallel to the axial direction at least partially coincide, and the orthographic projection of the first bearing and the orthographic projection of the guide sleeve on any plane parallel to the axial direction at least partially coincide. According to the embodiment of the invention, the cardio-pulmonary resuscitation device can have a smaller size in the direction perpendicular to the axial direction of the lead screw and can also have a smaller size in the axial direction, and the overall miniaturization of the cardio-pulmonary resuscitation device is facilitated.

Description

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202411053593.8, filed on July 31, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of medical device technology, and in particular to a cardiopulmonary resuscitation device. Background Technology

[0004] Cardiopulmonary resuscitation (CPR) devices are a type of equipment that uses machinery to replace human labor in performing life support operations such as chest compressions. Their main function is to control the compression structure to alternately perform compression and release operations on the patient's sternum.

[0005] In related technologies, the motor is located on the lateral side of the push rod assembly (i.e., perpendicular to the direction of movement of the push rod), and the motor and push rod are driven by a synchronous belt pulley assembly. This solution has a series of problems. For example, the cardiopulmonary resuscitation machine is large, occupies a lot of space, and is heavy. It is not convenient to carry or transport it inside or outside medical institutions or during transportation. Its size not only affects the user experience of the operator dedicated to emergency care, but also requires operating space when other resuscitation measures are combined during chest compressions. In addition, the power output of the motor needs to be transmitted through the synchronous belt pulley, which has low transmission efficiency. Furthermore, the motor itself generates a lot of heat, resulting in poor heat dissipation performance of the whole machine. Utility Model Content

[0006] Based on the technical problems existing in the background art, this application provides an improved cardiopulmonary resuscitation device to achieve overall miniaturization of the cardiopulmonary resuscitation device, while improving transmission efficiency and heat dissipation performance.

[0007] This application provides a cardiopulmonary resuscitation device, including:

[0008] An electric motor assembly includes a stator and a rotor, the rotor having an annular structure defining a hollow region, and the stator being disposed on the outer periphery of the rotor;

[0009] A lead screw, which is coaxially arranged with the rotor;

[0010] A connecting structure that connects the rotor and the lead screw;

[0011] A nut, which is sleeved on the outer periphery of the lead screw and engages with the lead screw;

[0012] A push rod assembly for performing chest compressions on a target, the push rod assembly including a push rod body and a compression structure, the compression structure being disposed at the end of the push rod body away from the motor assembly, and the other end of the push rod body near the motor assembly being connected to a lead screw nut, the push rod body being sleeved on the outer periphery of the lead screw; wherein, the rotor drives the lead screw to rotate through the connecting structure, the lead screw being used to drive the lead screw nut to move linearly along the axial direction during rotation, thereby driving the push rod assembly to move linearly along the axial direction through the lead screw nut;

[0013] A first bearing is used to simultaneously support the rotation of the rotor and the linear movement of the push rod assembly. The first bearing surrounds the outer periphery of the connecting structure and is located axially on the side of the rotor facing the pressing structure.

[0014] A guide sleeve is used to guide the push rod assembly to move linearly along the axial direction, and the guide sleeve is sleeved on the outer periphery of the push rod body;

[0015] The push rod assembly has an initial retracted position in which the orthographic projection of the nut and the stator on any plane parallel to the axial direction at least partially coincides, and the orthographic projection of the first bearing and the guide sleeve on any plane parallel to the axial direction at least partially coincides.

[0016] In this embodiment, the lead screw and rotor are arranged coaxially, allowing the motor assembly to be positioned at one end of the lead screw along its axial direction. This helps reduce the size of the CPR device in any direction perpendicular to the axial direction, thus improving the device's structural compactness. Furthermore, since the orthographic projections of the lead screw nut and stator on any plane parallel to the axial direction at least partially coincide in the initial contracted position, and the orthographic projections of the first bearing and guide sleeve on any plane parallel to the axial direction also at least partially coincide, this helps reduce the axial size of the CPR device. In other words, the CPR device can have a smaller size both perpendicular to the lead screw axis and in the axial direction, facilitating overall miniaturization. The rotor directly drives the lead screw through the connecting structure, improving the motor's kinetic energy utilization and transmission efficiency. Because intermediate transmission components such as pulleys are not required, heat generation is less severe, and heat dissipation is better.

[0017] This application provides a cardiopulmonary resuscitation device, including:

[0018] An electric motor assembly includes a stator and a rotor, the rotor having an annular structure defining a hollow region, and the stator being disposed on the outer periphery of the rotor;

[0019] A lead screw, which is coaxially arranged with the rotor;

[0020] A nut, which is sleeved on the outer periphery of the lead screw and engages with the lead screw;

[0021] A push rod assembly for performing chest compressions on a target, the push rod assembly including a push rod body and a compression structure, the compression structure being disposed at the end of the push rod body away from the motor assembly, the other end of the push rod body being close to the motor assembly being connected to the lead screw nut, and the push rod body being sleeved on the outer periphery of the lead screw;

[0022] A connecting structure connects the rotor and the lead screw. The connecting structure includes a connecting end and a connecting cylinder. The connecting cylinder is hollow and has an opening at one end facing the pressing structure. The connecting end is located at the end of the connecting cylinder away from the opening. The connecting end passes through or is housed in the hollow region of the rotor. The end of the lead screw near the rotor passes through or is housed in the connecting end. The rotor drives the lead screw to rotate via the connecting structure. The lead screw drives the lead screw nut to move linearly along the axial direction during rotation, thereby driving the push rod assembly to move linearly along the axial direction via the lead screw nut.

[0023] A guide sleeve is used to guide the push rod body to move linearly along the axial direction, and the guide sleeve is sleeved on the outer periphery of the push rod body;

[0024] The push rod assembly has an initial retracted position, in which the nut and the guide sleeve are inserted into the connecting cylinder through the opening of the connecting structure.

[0025] In this embodiment, the lead screw and rotor are arranged coaxially, allowing the motor assembly to be positioned at one end of the lead screw along its axial direction. This helps reduce the size of the CPR device in any direction perpendicular to the axial direction, thus improving the device's structural compactness. Furthermore, since the nut and guide sleeve are inserted into the connecting cylinder through the opening in the connecting structure at the initial contraction position, it helps reduce the size of the CPR device along the lead screw's axial direction. In other words, the CPR device can have a smaller size both perpendicular to and axially, facilitating overall miniaturization. The rotor directly drives the lead screw through the connecting structure, improving the motor's kinetic energy utilization and transmission efficiency. Because intermediate transmission components such as pulleys are not required, heat generation is less severe, and heat dissipation is better.

[0026] In some embodiments, the cardiopulmonary resuscitation device further includes a first bearing for simultaneously supporting the rotation of the rotor and the linear movement of the push rod assembly, the first bearing surrounding the outer periphery of the connecting cylinder and located axially on the side of the rotor facing the pressing structure.

[0027] This application provides a cardiopulmonary resuscitation device, including:

[0028] Motor assembly, including stator and rotor;

[0029] A lead screw, which is coaxially arranged with the rotor;

[0030] A connecting structure that connects the rotor and the lead screw;

[0031] A nut, which is sleeved on the outer periphery of the lead screw and engages with the lead screw;

[0032] A push rod assembly for performing chest compressions on a target, the push rod assembly including a push rod body and a compression structure, the compression structure being disposed at the end of the push rod body away from the motor assembly, and the other end of the push rod body near the motor assembly being connected to a lead screw nut, the push rod body being sleeved on the outer periphery of the lead screw; wherein, the rotor drives the lead screw to rotate through the connecting structure, the lead screw being used to drive the lead screw nut to move linearly along the axial direction during rotation, thereby driving the push rod assembly to move linearly along the axial direction through the lead screw nut;

[0033] A first bearing is used to simultaneously support the rotation of the rotor and the linear movement of the push rod assembly. The first bearing surrounds the outer periphery of the connecting structure and is located axially on the side of the rotor facing the pressing structure. The first bearing has a first shaft end face on the side facing the pressing structure.

[0034] A guide sleeve is used to guide the push rod body to move linearly along the axial direction, and the guide sleeve is sleeved on the outer periphery of the push rod body;

[0035] The push rod assembly has an initial retracted position in which at least a portion of the nut extends beyond the first shaft end face in an axial direction away from the pressing structure, and the first bearing and the guide sleeve at least partially coincide in orthographic projection on any plane parallel to the axial direction.

[0036] In this embodiment, the lead screw and rotor are arranged coaxially, allowing the motor assembly to be positioned at one end of the lead screw along its axial direction. This helps reduce the size of the CPR device in any direction perpendicular to the axial direction, thus improving the device's structural compactness. Furthermore, since at least a portion of the lead screw nut extends beyond the first shaft end face along the axial direction away from the pressing structure in the initial contracted position, and the orthographic projections of the first bearing and the guide sleeve on any plane parallel to the axial direction at least partially coincide, this helps reduce the axial size of the CPR device. In other words, the CPR device can have a smaller size both perpendicular to the lead screw axis and in the axial direction, facilitating overall miniaturization. The rotor directly drives the lead screw through the connecting structure, improving the motor's kinetic energy utilization and transmission efficiency. Because intermediate transmission components such as pulleys are not required, heat generation is less severe, and heat dissipation is better.

[0037] In some embodiments, the rotor has an annular structure and defines a hollow region, and the stator is disposed on the outer periphery of the rotor.

[0038] In some embodiments, at the initial contraction position, the nut and the rotor at least partially coincide in orthogonal projection on any plane parallel to the axial direction, or the nut is located axially on the side of the rotor facing the pressing structure.

[0039] In some embodiments, the shaft end of the lead screw near the motor assembly passes axially through or is housed in the hollow region of the rotor.

[0040] In some embodiments, a portion of the connecting structure passes through or is housed within the hollow region of the rotor.

[0041] In some embodiments, the connecting structure includes a connecting end and a connecting cylinder portion, the connecting cylinder portion having an opening at one end facing the pressing structure, the connecting end being disposed at the end of the cylinder portion away from the opening, the connecting end passing through or being accommodated in the hollow region of the rotor, and the end of the lead screw near the rotor passing through or being accommodated in the connecting end;

[0042] At the initial contraction position, the nut and the guide sleeve are inserted into the connecting cylinder through the opening of the connecting structure.

[0043] In some embodiments, the motor assembly further includes a housing, within which the stator and the rotor are disposed;

[0044] The first bearing is disposed outside the housing and is located axially on the side of the housing facing the pressing structure; or, the first bearing is at least partially disposed inside the housing and is radially disposed between the connecting structure and the housing.

[0045] In some embodiments, the first bearing has a first shaft end face on the side facing the pressing structure, and in the initial contracted position, at least a portion of the nut extends beyond the first shaft end face in an axial direction away from the pressing structure.

[0046] In some embodiments, at the initial contraction position, the orthographic projections of the nut, the first bearing, and the guide sleeve on any plane parallel to the axial direction at least partially coincide; or...

[0047] The first bearing has a second shaft end face on the side away from the pressing structure, and in the initial contracted position, the entire nut extends beyond the second shaft end face in an axial direction away from the pressing structure.

[0048] In some embodiments, the motor assembly further includes a housing, within which the stator and the rotor are disposed;

[0049] The nut is disposed on the outside of the housing and is located axially on the side of the housing facing the pressing structure; or, the nut is at least partially disposed inside the housing.

[0050] In some embodiments, the cardiopulmonary resuscitation device further includes a sleeve fitted around the outer periphery of the guide sleeve and fixed relative to the stator, with the push rod body at least partially located inside the sleeve; the first bearing and the sleeve at least partially coincide in orthographic projection on any plane parallel to the axial direction.

[0051] In some embodiments, the cardiopulmonary resuscitation device further includes a sleeve, which is fitted around the outer periphery of the guide sleeve and fixed relative to the stator, with the push rod body at least partially located inside the sleeve; the sleeve is inserted into the connecting sleeve portion through the opening of the connecting structure.

[0052] In some embodiments, the cardiopulmonary resuscitation device further includes a sleeve fitted around the outer periphery of the guide sleeve and fixed relative to the stator, wherein the push rod body is at least partially located inside the sleeve.

[0053] In some embodiments, at the initial contraction position, the guide sleeve is at least partially located within the sleeve;

[0054] The push rod assembly also has an extreme extension position, in which the guide sleeve extends out of the sleeve.

[0055] In some embodiments, anti-rotation structures are respectively provided between the push rod body and the guide sleeve, and between the guide sleeve and the sleeve, and the guide sleeve is capable of linear axial movement relative to the sleeve.

[0056] In some embodiments, the guide sleeve is movably connected to the push rod assembly so that the guide sleeve can move linearly along the axial direction relative to the push rod assembly.

[0057] In some embodiments, the guide sleeve is provided with a first stop structure and a second stop structure, wherein the first stop structure is located on the side of the second stop structure that is axially close to the pressing structure;

[0058] The cardiopulmonary resuscitation device further includes a connector disposed on the outer periphery of the push rod assembly. The connector extends into the gap region between the first stop structure and the second stop structure, and the connector is capable of linear axial movement within the gap region.

[0059] In some embodiments, the sidewall of the guide sleeve is provided with a guide groove, the guide groove extends axially, the connector extends into the guide groove, and is able to move linearly axially within the guide groove;

[0060] The guide groove wall on the side closer to the pressing structure forms at least a part of the first stop structure, and the guide groove wall on the side away from the pressing structure forms at least a part of the second stop structure.

[0061] In some embodiments, at the initial contracted position, the second stop structure abuts against the connector on the side axially away from the pressing structure, so that the connector bears at least a portion of the weight of the guide sleeve.

[0062] In some embodiments, a first limiting structure is provided on the outer peripheral surface of the guide sleeve, and the cardiopulmonary resuscitation device further includes a second limiting structure that cooperates with the first limiting structure. The first limiting structure and the second limiting structure are used to limit the distance of linear movement of the guide sleeve in the sleeve along the axial direction towards the side of the pressing structure.

[0063] In some embodiments, the first limiting structure is a stepped surface formed on the outer peripheral surface of the guide sleeve, the stepped surface being located on the side of the guide sleeve near the pressing structure, and the second limiting structure is a protruding structure that protrudes radially inward from the inner peripheral surface of the sleeve.

[0064] In some embodiments, the first limiting structure is a stepped surface formed on the outer peripheral surface of the guide sleeve, the stepped surface being located on the side of the guide sleeve near the pressing structure; the cardiopulmonary resuscitation device further includes an end cap, the end cap being disposed at one end of the sleeve near the pressing structure, the push rod body passing through the end cap, and the second limiting structure being a protrusion structure that protrudes radially inward from the inner peripheral surface of the end cap.

[0065] In some embodiments, the motor assembly further includes a housing, and the sleeve and the housing are integrally formed.

[0066] In some embodiments, the motor assembly is located axially at one end of the sleeve away from the pressing structure, and the motor assembly further includes a housing, the sleeve being integrally disposed outside the housing and located axially on the side of the housing facing the pressing structure.

[0067] In some embodiments, the motor assembly further includes a housing, and a portion of the sleeve is disposed inside the housing;

[0068] The sleeve and the rotor at least partially coincide in orthographic projection on any plane parallel to the axial direction; or, the sleeve is located axially on the side of the rotor facing the pressing structure.

[0069] In some embodiments, the cardiopulmonary resuscitation device further includes a sleeve, which is fitted around the outer periphery of the guide sleeve and fixed relative to the stator, and the push rod body is at least partially located inside the sleeve;

[0070] The sleeve is provided with a flange on the outer periphery of one end near the motor assembly, and the flange extends radially outward;

[0071] The motor assembly includes a housing, and the flange is disposed on the outside of the housing and is located axially on the side of the housing facing the pressing structure;

[0072] The outer shell is directly or indirectly connected to the flange.

[0073] In some embodiments, the first bearing is disposed outside the housing and is located axially on the side of the housing facing the pressing structure, the first bearing being axially disposed between the housing and the flange.

[0074] In some embodiments, the cardiopulmonary resuscitation device includes a connecting post connected to the housing, the connecting post extending axially from the housing toward the pressing structure, the connecting post connecting the housing and the flange.

[0075] In some embodiments, the cardiopulmonary resuscitation device further includes a bearing housing, wherein the first bearing is disposed in the bearing housing, and the cardiopulmonary resuscitation device includes a connecting post connected to the housing, the connecting post extending axially from the housing toward the pressing structure, the connecting post connecting the housing and the bearing housing.

[0076] In some embodiments, the first bearing includes a bearing housing, the first bearing is disposed in the bearing housing, and the bearing housing is directly connected to the flange and the housing.

[0077] In some embodiments, the housing is directly connected to the flange, and the first bearing is disposed inside the housing and radially disposed between the housing and the connecting structure.

[0078] In some embodiments, the rotor and the connecting structure are an integral structure, or the rotor and the connecting structure are separate structures.

[0079] In some embodiments, the cardiopulmonary resuscitation device further includes a detection structure for detecting the rotation angle of at least one of the rotor, the connecting structure, and the lead screw.

[0080] In some embodiments, the detection structure is at least partially located radially inside the stator and is sleeved on the outer periphery of the connecting structure; or, the detection structure is located axially on the side of the stator away from the pressing structure.

[0081] In some embodiments, the cardiopulmonary resuscitation device further includes a second bearing disposed on the outer periphery of the connecting structure or on the outer periphery of the lead screw near the end of the motor assembly, and the second bearing is axially located on the side of the rotor away from the first bearing, and the first bearing and the second bearing are coaxially arranged. Attached Figure Description

[0082] Figure 1 This is a schematic diagram of the structure of a cardiopulmonary resuscitation device according to an embodiment of this application, wherein the push rod assembly is in the initial contracted position;

[0083] Figure 2 for Figure 1 A partially exploded diagram of the structure shown.

[0084] Figure 3 for Figure 2 A further exploded diagram of the structure shown;

[0085] Figure 4 for Figure 1 A schematic diagram of the push rod assembly in its maximum extended position;

[0086] Figure 5 for Figure 1 The structure shown is a cross-sectional view of the first cutting plane, which passes through the centerline of the lead screw, the first limiting structure, and the second limiting structure.

[0087] Figure 6 for Figure 1 The structure shown is a cross-sectional view of the second section, which passes through the centerline of the lead screw and the connector;

[0088] Figure 7 for Figure 6 The diagram shown is a schematic representation of the push rod assembly and guide sleeve moving to their extreme positions relative to the sleeve's axial movement.

[0089] Figure 8 for Figure 7 A schematic diagram of the structure from the perspective shown;

[0090] Figure 9 for Figure 5 The diagram shown illustrates the push rod assembly at its maximum extension position from the indicated perspective.

[0091] Figure 10 for Figure 6 The diagram shown illustrates the push rod assembly at its maximum extension position from the indicated perspective.

[0092] Figure 11 This is a cross-sectional view of the cardiopulmonary resuscitation device according to the second embodiment of this application;

[0093] Figure 12 for Figure 11 The diagram shown illustrates the push rod assembly at its maximum extension position from the perspective of the structure shown.

[0094] Figure 13 This is a cross-sectional view of a portion of the structure of the cardiopulmonary resuscitation device according to the third embodiment of this application;

[0095] Figure 14 for Figure 13 The diagram shows the push rod assembly at its maximum extension position from the perspective shown.

[0096] Explanation of reference numerals in the attached figures

[0097] 10. Motor assembly; 11. Rotor; 12. Stator; 13. Housing; 20. Push rod assembly; 21. Push rod body; 22. Pressing structure; 23. Connecting piece; 30. Lead screw; 35. Lead nut; 40. Connecting structure; 41. Connecting cylinder; 41a. Opening; 42. Connecting end; 50. Sleeve; 51. Flange; 52. Second limiting structure; 53. End cap; 54. Connecting post; 60. Guide sleeve; 60a. Guide groove; 61. First stop structure; 62. Second stop structure; 63. First limiting structure; 64. Clearance structure; 71. First bearing; 71a. First shaft end face; 71b. Second shaft end face; 72. Bearing seat; 73. Second bearing; 80. Detection structure. Detailed Implementation

[0098] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0099] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0100] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0101] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0102] This application provides cardiopulmonary resuscitation (CPR) devices with various embodiments. Based on the concept of improving the transmission efficiency and heat dissipation performance of the CPR device, and the compact structure with small dimensions in both the axial and perpendicular directions, the device achieves a compact design by rationally arranging the lead screw 30, rotor 11, first bearing 71, guide sleeve 60, and sleeve 50. This allows the motor assembly 10 to be positioned at one end of the lead screw 30 in the axial direction, resulting in higher space utilization in the radial direction of the lead screw 30. This helps reduce the dimensions of the CPR device in all directions perpendicular to the axial direction (i.e., the radial direction of the lead screw 30), thus improving the structural compactness of the CPR device. Furthermore, in the initial contraction state, since the nut 35 can pass through the first bearing 71 and / or enter the interior of the motor assembly 10, the pressing height utilization of the push rod assembly 20 is high. This also helps reduce the axial dimension of the CPR device in the initial contraction position. In other words, the CPR device can have small dimensions in all directions perpendicular to the axial direction of the lead screw 30, as well as a small axial dimension, which is beneficial for achieving overall miniaturization of the CPR device. Furthermore, using a rotor to directly drive the lead screw 30 through a connecting structure helps improve the kinetic energy utilization of the motor and increase transmission efficiency; since there is no need to use intermediate transmission components such as pulleys, the heat generation is not too severe, and the heat dissipation effect is also better.

[0103] This application provides a cardiopulmonary resuscitation device; please refer to [link / reference]. Figure 3 , Figure 5 , Figure 11 as well as Figure 13 It includes a motor assembly 10, a lead screw 30, a connecting structure 40, a lead screw nut 35, and a push rod assembly 20.

[0104] Please see Figure 5 The motor assembly 10 includes a stator 12 and a rotor 11, with the stator 12 disposed on the outer periphery of the rotor 11. That is, the motor assembly 10 is an internal rotor motor. The rotor 11 has a ring-shaped structure and defines a hollow region, which is the area enclosed by the ring-shaped structure.

[0105] The lead screw 30 is coaxially arranged with the rotor 11, and the rotation axis of the lead screw 30 and the rotation axis of the rotor 11 are approximately coincident, and they rotate around the same axis. That is to say, the motor assembly 10 and the lead screw 30 are arranged coaxially.

[0106] The connecting structure 40 connects the rotor 11 and the lead screw 30. The rotor 11 drives the lead screw 30 to rotate through the connecting structure 40.

[0107] It should be noted that the connection relationship between the connecting structure 40, the lead screw 30, and the rotor 11 is not limited. For example, the connecting structure 40 and the rotor 11 can be integrally formed, meaning they are manufactured together as a single component. Alternatively, the connecting structure 40 and the lead screw 30 can be integrally formed, meaning they are manufactured together as a single component. Or, the connecting structure 40 can be a separate component, connected to the rotor 11 via methods such as welding, bonding, or screws, and connected to the lead screw 30 via methods such as welding, bonding, or screws. In short, the connecting structure 40 only needs to be able to transmit the torque of the rotor 11 to the lead screw 30.

[0108] The nut 35 is sleeved on the outer periphery of the lead screw 30 and engages with it. When the lead screw 30 rotates, the nut 35 does not rotate, but under the action of the lead screw 30, the nut 35 moves linearly along the axial direction of the lead screw 30. For example, when the lead screw 30 rotates clockwise, the nut 35 moves linearly towards the pressing structure 22; when the lead screw 30 rotates counterclockwise, the nut 35 moves linearly away from the pressing structure 22. It should be noted that clockwise and counterclockwise rotations are only used to express that two directions are opposite and do not specifically refer to any particular direction.

[0109] The type of fit between the lead screw 30 and the lead nut 35 is not limited; for example, it can be a threaded fit or a ball fit. Of course, the lead screw 30 and the lead nut 35 can also have other types of fits, which are not restricted here.

[0110] The push rod assembly 20 is used to perform chest compressions on the target. The push rod assembly 20 includes a push rod body 21 and a compression structure 22, which is located at the end of the push rod body 21 away from the motor assembly 10. The push rod assembly 20 acts on the chest cavity of the target through the compression structure 22.

[0111] Please see Figures 5 to 7 , Figures 9 to 14 The push rod body 21 is connected to the lead screw nut 35 at the other end near the motor assembly 10, and the push rod body 21 is sleeved on the outer periphery of the lead screw 30. The rotor 11 drives the lead screw 30 to rotate through the connecting structure 40. The lead screw 30 is used to drive the lead screw nut 35 to move linearly along the axial direction during rotation, and then drives the push rod assembly 20 to move linearly along the axial direction through the lead screw nut 35.

[0112] For example, when the rotor 11 of the motor assembly 10 rotates forward, it drives the lead screw 30 to rotate forward via the connecting structure 40. When the lead screw 30 rotates forward, it drives the lead screw nut 35 to move linearly towards the compression structure 22 (i.e., away from the rotor 11). The lead screw nut 35 drives the push rod body 21 to move synchronously, and the push rod body 21 drives the compression structure 22 towards the patient, thereby performing chest compressions on the patient's chest cavity. Afterward, when the rotor 11 rotates in reverse, it drives the lead screw 30 to rotate in reverse via the connecting structure 40. When the lead screw 30 rotates in reverse, it drives the lead screw nut 35 to move linearly away from the compression structure 22 (i.e., towards the rotor 11). The lead screw nut 35 drives the push rod body 21 to move synchronously, and the push rod body 21 drives the compression structure 22 away from the patient, releasing the patient's chest cavity. The rotor 11 alternately rotates forward and in reverse, enabling the compression structure 22 to alternately perform compressions and releases on the patient.

[0113] In this embodiment, the push rod body 21 and the nut 35 are two independent components. Therefore, only the part where the nut 35 mates with the lead screw 30 needs to be processed. Further processing of the push rod body 21 to mate with the lead screw 30 is unnecessary (e.g., machining threads on the push rod body 21 to mate with the lead screw 30). In other words, the structure of the push rod body 21 in this embodiment does not require special customization, reducing processing costs and time, and thus lowering the cost of the cardiopulmonary resuscitation device. In some related technologies, threads are machined on the push rod body to mate with the lead screw (i.e., eliminating the nut in this embodiment). Since the lead screw and threads need to transmit torque, the push rod body needs to be made of a high-quality metal, and machining threads on it is difficult and requires specialized cutting tools, resulting in high costs and complex processing.

[0114] In some embodiments, when the cardiopulmonary resuscitation device is in use, the lead screw 30 and the push rod body 21 are arranged generally in a vertical direction, and the motor assembly 10 is located above the push rod body 21. Here, "vertical direction" can be understood as... Figure 4 The up and down directions in the middle.

[0115] The cardiopulmonary resuscitation device also includes a first bearing 71, which simultaneously supports the rotation of the rotor 11 and the linear movement of the push rod assembly 20. The first bearing 71 surrounds the outer periphery of the connecting structure 40 and is axially located on the side of the rotor 11 facing the pressing structure 22. On one hand, the first bearing 71 provides radial positioning for the connecting structure 40, improving the smoothness and stability of its rotation. On the other hand, it also bears the weight of the connecting structure 40 and its load, providing gravitational support. Specifically, since the connecting structure 40 is connected to the rotor 11, the first bearing 71 supports the connecting structure 40 while simultaneously providing axial and radial support to the rotor 11 through the connecting structure 40, maintaining the radial positioning and axial support of the rotor 11. Furthermore, the weight of the lead screw 30 and the push rod assembly 20 is borne by the connecting structure 40; therefore, the first bearing 71 provides axial support and radial positioning to the lead screw 30 and the push rod assembly 20 through the connecting structure 40.

[0116] Please see Figures 5 to 14 The cardiopulmonary resuscitation device also includes a guide sleeve 60, which guides the push rod assembly 20 to move linearly along the axial direction. The guide sleeve 60 is fitted around the outer periphery of the push rod body 21, i.e., the push rod body 21 and the guide sleeve 60 are nested together. The guide sleeve 60 helps to improve the reliability and stability of the push rod assembly 20's movement.

[0117] Please see Figure 5 , Figure 6 as well as Figure 13 The push rod assembly 20 has an initial retracted position. In this position, the orthographic projections of the nut 35 and the stator 12 on any plane parallel to the axial direction at least partially overlap. That is, in the initial retracted position, both the nut 35 and the lead screw 30 can extend into the motor assembly 10. In this embodiment, due to the hollow shape of the stator 12 and the rotor 11, and the stator 12 surrounding the outer periphery of the rotor 11, the overall structure formed by the stator 12 and the rotor 11 occupies a relatively small space in the axial direction. Furthermore, the nut 35 and the lead screw 30 can fully utilize the hollow space of the stator 12, which is beneficial for further reducing the axial dimensions of the cardiopulmonary resuscitation device. Also, the orthographic projections of the first bearing 71 and the guide sleeve 60 on any plane parallel to the axial direction at least partially overlap. It should be noted that since the first bearing 71 is sleeved on the outer periphery of the connecting structure 40, and the connecting structure 40 and the first bearing 71 do not move relative to each other along the axial direction, the end of the guide sleeve 60 extends into the interior of the connecting structure 40 in the initial contracted position. In this way, the internal space of the connecting structure 40 can be fully utilized, which is beneficial to reducing the axial size of the cardiopulmonary resuscitation device.

[0118] The initial retracted position refers to the extreme position of the push rod assembly 20 when it moves to the side closest to the motor assembly 10, as designed in the product. When the cardiopulmonary resuscitation device is not in use, such as during manufacturing, transportation, or storage, the push rod assembly 20 is in the initial retracted position. Therefore, the relative positional relationship of the various components of the push rod assembly 20 in the initial retracted position determines the overall size of the cardiopulmonary resuscitation device.

[0119] In this embodiment, the lead screw 30 and rotor 11 are arranged coaxially, allowing the motor assembly 10 to have one axial end of the lead screw 30. This results in higher space utilization in the radial direction of the lead screw 30, which helps reduce the dimensions of the cardiopulmonary resuscitation device in all directions perpendicular to the axial direction (i.e., the radial direction of the lead screw 30), thus improving the structural compactness of the cardiopulmonary resuscitation device. Furthermore, since the orthographic projections of the nut 35 and stator 12 on any plane parallel to the axial direction at the initial contraction position are at least partially coincident, and the orthographic projections of the first bearing 71 and guide sleeve 60 on any plane parallel to the axial direction are at least partially coincident, this helps reduce the axial dimensions of the cardiopulmonary resuscitation device. Due to the hollow shape of the stator 12 and rotor 11, and the stator 12 surrounding the outer periphery of the rotor 11, the nut 35 can pass through the first bearing 71 and enter the interior of the motor assembly 10, resulting in higher utilization of the pressing height of the push rod assembly 20. In other words, the cardiopulmonary resuscitation device can have a small size in all directions perpendicular to the axis of the lead screw 30, as well as a small size in the axial direction, which is conducive to the overall miniaturization of the cardiopulmonary resuscitation device.

[0120] In this embodiment, the rotor 11 directly drives the lead screw 30 to rotate through the connecting structure, which is beneficial to improve the kinetic energy utilization of the motor and improve the transmission efficiency. Since there is no need to use intermediate transmission components such as pulleys, the heat generation is not too serious and the heat dissipation effect is better.

[0121] It should be noted that in the embodiments of this application, the axial direction of the first bearing 71, the axial direction of the rotor 11, the axial direction of the lead screw 30, and the axial direction of the cardiopulmonary resuscitation device refer to the same direction.

[0122] Based on the compact design of the cardiopulmonary resuscitation (CPR) device, this application also provides a CPR device. Please refer to [link to relevant documentation]. Figure 3 , Figure 5 , Figure 11 as well as Figure 13 It includes a motor assembly 10, a lead screw 30, a connecting structure 40, a lead screw nut 35, and a push rod assembly 20.

[0123] The motor assembly 10 includes a stator 12 and a rotor 11. The rotor 11 has an annular structure and defines a hollow region. The stator 12 is disposed on the outer periphery of the rotor 11.

[0124] The lead screw 30 and the rotor 11 are coaxially arranged. The structure of the lead screw 30 and the rotor 11 can adopt any of the above and below embodiments of this application, and will not be described again here.

[0125] The nut 35 is sleeved on the outer periphery of the lead screw 30 and is engaged with the lead screw 30.

[0126] The push rod assembly 20 is used to perform chest compressions on the target. The push rod assembly 20 includes a push rod body 21 and a pressing structure 22. The pressing structure 22 is located at the end of the push rod body 21 away from the motor assembly 10. The other end of the push rod body 21 near the motor assembly 10 is connected to the lead screw 35, and the push rod body 21 is sleeved on the outer periphery of the lead screw 30.

[0127] The structure of the nut 35 and the push rod assembly 20 can adopt the nut 35 and the push rod assembly 20 of any of the above and below embodiments, and will not be described again here.

[0128] Connection structure 40 connects rotor 11 and lead screw 30. (See also...) Figure 8 and Figure 14 The connecting structure 40 includes a connecting end 42 and a connecting cylindrical portion 41. The connecting cylindrical portion 41 is hollow and has an opening 41a at one end facing the pressing structure 22. The connecting end 42 is located at the end of the connecting cylindrical portion 41 away from the opening 41a. Please refer to [link to relevant documentation]. Figures 5 to 14 The connecting end 42 passes through or is housed in the hollow region of the rotor 11. One end of the lead screw 30 near the rotor 11 passes through or is housed in the connecting end 42. The rotor 11 drives the lead screw 30 to rotate through the connecting structure 40. The lead screw 30 drives the lead screw nut 35 to move linearly along the axial direction during rotation, and then drives the push rod assembly 20 to move linearly along the axial direction through the lead screw nut 35.

[0129] "Connecting end 42 passing through the hollow region of rotor 11" means that, in the axial direction away from push rod assembly 20, connecting end 42 extends beyond the axial end face of rotor 11 away from push rod assembly 20. "Connecting end 42 being accommodated in the hollow region of rotor 11" means that connecting end 42 extends into the hollow region, and connecting end 42 does not exceed the axial end face of rotor 11 away from push rod assembly 20.

[0130] "The end of the lead screw 30 near the rotor 11 passes through the connecting end 42" means that the shaft end of the lead screw 30 extends beyond the end face of the connecting end 42 away from the connecting cylinder 41. "The end of the lead screw 30 near the rotor 11 is housed in the connecting end 42" means that the shaft end of the lead screw 30 extends into the connecting end 42 but does not extend beyond the end face of the connecting end 42 away from the connecting cylinder 41.

[0131] The guide sleeve 60 is used to guide the linear movement of the push rod body 21 along the axial direction. The guide sleeve 60 is sleeved on the outer periphery of the push rod body 21. The guide sleeve 60 helps to improve the reliability and stability of the movement of the push rod assembly 20.

[0132] Please see Figure 5 , Figure 6 , Figure 11 as well as Figure 13 The push rod assembly 20 has an initial retracted position, in which the nut 35 and guide sleeve 60 are inserted into the connecting cylinder 41 through the opening 41a of the connecting structure 40.

[0133] In this embodiment, the lead screw 30 and rotor 11 are arranged coaxially, allowing the motor assembly 10 to be positioned at one axial end of the lead screw 30. This results in higher space utilization in the radial direction of the lead screw 30, which helps reduce the dimensions of the cardiopulmonary resuscitation (CPR) device in all directions perpendicular to the axial direction (i.e., the radial direction of the lead screw 30), thus improving the structural compactness of the CPR device. Furthermore, since the nut 35 and guide sleeve 60 are inserted into the connecting cylinder portion 41 through the opening 41a of the connecting structure 40 in the initial contracted position, it helps reduce the axial dimension of the CPR device. In other words, the CPR device can have smaller dimensions in all directions perpendicular to the axial direction, as well as a smaller axial dimension, which facilitates the overall miniaturization of the CPR device.

[0134] In this embodiment, the rotor 11 directly drives the lead screw 30 to rotate through the connecting structure, which is beneficial to improve the kinetic energy utilization of the motor and improve the transmission efficiency. Since there is no need to use intermediate transmission components such as pulleys, the heat generation is not too serious and the heat dissipation effect is better.

[0135] For example, the cardiopulmonary resuscitation device also includes a first bearing 71 for simultaneously supporting the rotation of the rotor 11 and the linear movement of the push rod assembly 20. The first bearing 71 surrounds the outer periphery of the connecting cylinder portion 41 and is located axially on the side of the rotor 11 facing the pressing structure 22.

[0136] The supporting principle and supporting function of the first bearing 71 for the rotor 11 and push rod assembly 20 can be found in the above and below embodiments, and will not be repeated here.

[0137] Based on the compact design of the cardiopulmonary resuscitation (CPR) device, this application also provides another CPR device; please refer to [link to relevant documentation]. Figure 3 , Figure 5 , Figure 11 as well as Figure 13 It includes a motor assembly 10, a lead screw 30, a connecting structure 40, a lead nut 35, a guide sleeve 60, and a push rod assembly 20.

[0138] The motor assembly 10 includes a stator 12 and a rotor 11.

[0139] The lead screw 30 is coaxially arranged with the rotor 11.

[0140] The connecting structure 40 connects the rotor 11 and the lead screw 30. The structure of the lead screw 30 and the rotor 11 can adopt any of the above embodiments, and will not be described in detail here.

[0141] The nut 35 is sleeved on the outer periphery of the lead screw 30 and is engaged with the lead screw 30.

[0142] The push rod assembly 20 is used to perform chest compressions on the target. The push rod assembly 20 includes a push rod body 21 and a pressing structure 22. The pressing structure 22 is located at the end of the push rod body 21 away from the motor assembly 10. The other end of the push rod body 21, which is close to the motor assembly 10, is connected to the lead screw 35. The push rod body 21 is sleeved on the outer periphery of the lead screw 30. The rotor 11 drives the lead screw 30 to rotate through the connecting structure 40. The lead screw 30 drives the lead screw 35 to move linearly along the axial direction during rotation, thereby driving the push rod assembly 20 to move linearly along the axial direction through the lead screw 35.

[0143] The structure of the nut 35 and the push rod assembly 20 can adopt any of the above and below embodiments of the nut 35 and the push rod assembly 20, which will not be described in detail here.

[0144] The first bearing 71 is used to simultaneously support the rotation of the rotor 11 and the linear movement of the push rod assembly 20. The first bearing 71 surrounds the outer periphery of the connecting structure 40 and is located axially on the side of the rotor 11 facing the pressing structure 22. The supporting principle and supporting function of the first bearing 71 for the rotor 11 and the push rod assembly 20 can be found in the principle and function of the first bearing 71 in the above and following embodiments, and will not be repeated here.

[0145] The first bearing 71 has a first shaft end face 71a on the side facing the pressing structure 22.

[0146] The guide sleeve 60 is used to guide the linear movement of the push rod body 21 along the axial direction. The guide sleeve 60 is sleeved on the outer periphery of the push rod body 21. The guide sleeve 60 helps to improve the reliability and stability of the movement of the push rod assembly 20.

[0147] Please see Figure 5 , Figure 6 , Figure 11 as well as Figure 13 The push rod assembly 20 has an initial retracted position in which at least a portion of the nut 35 extends beyond the first shaft end face 71a in an axial direction away from the pressing structure 22, and the first bearing 71 and the guide sleeve 60 at least partially coincide in orthographic projection on any plane parallel to the axial direction.

[0148] In this embodiment, the lead screw 30 and rotor 11 are arranged coaxially, allowing the motor assembly 10 to be positioned at one axial end of the lead screw 30. This results in higher space utilization in the radial direction of the lead screw 30, which helps reduce the dimensions of the cardiopulmonary resuscitation (CPR) device in all directions perpendicular to the axial direction of the lead screw 30 (i.e., the radial direction of the lead screw 30), thus improving the structural compactness of the CPR device. Furthermore, since at least a portion of the nut 35 extends beyond the first shaft end face 71a along the axial direction and away from the pressing structure 22 in the initial contracted position, and the orthogonal projections of the first bearing 71 and the guide sleeve 60 on any plane parallel to the axial direction at least partially coincide, this helps reduce the axial dimension of the CPR device. In other words, the CPR device can have smaller dimensions in all directions perpendicular to the axial direction of the lead screw 30, as well as a smaller axial dimension, which is beneficial for achieving overall miniaturization of the CPR device.

[0149] In this embodiment, the rotor 11 directly drives the lead screw 30 to rotate through the connecting structure, which is beneficial to improve the kinetic energy utilization of the motor and improve the transmission efficiency. Since there is no need to use intermediate transmission components such as pulleys, the heat generation is not too serious and the heat dissipation effect is better.

[0150] For example, the rotor 11 has an annular structure and defines a hollow region, and the stator 12 is disposed on the outer periphery of the rotor 11. That is, in this embodiment, the motor assembly 10 is an internal rotor motor.

[0151] Without contradiction, the various technical solutions in the embodiments of this application can be applied to the embodiments of any of the above-described technical concepts.

[0152] By way of example, the motor assembly 10 also includes a housing 13, in which the stator 12 and the rotor 11 are disposed. The housing 13 provides protection for the stator 12 and the rotor 11.

[0153] In some embodiments, the stator 12 and rotor 11 form at least part of a frameless motor, which can be a commercially available frameless motor. The frameless motor is housed within a housing 13, which serves to mount and support the stator 12. The housing 13 can be designed according to the overall structural requirements of the cardiopulmonary resuscitation device. Thus, even if the housing 13 has special requirements, only the structure of the housing 13 needs to be designed, while the frameless motor can be purchased without customization, which also helps reduce production costs.

[0154] Furthermore, the frameless motor offers advantages such as light weight, compact design, low inertia, precise control, rapid dynamic response, and frictionless commutation, which enhance the operator's experience when using the CPR device and improve the pressing performance of the push rod assembly 20. The frameless motor's rotor directly drives the lead screw 30 through a connecting structure, improving the motor's kinetic energy utilization and transmission efficiency. Since it eliminates the need for intermediate transmission components like pulleys, heat generation is less severe, resulting in better heat dissipation. The frameless motor can be positioned at one end of the lead screw 30's axial direction, maximizing space utilization in the radial direction. Because the nut 35 and lead screw 30 can be installed inside the frameless motor, and the nut 35 can pass through the first bearing 71 into the motor assembly 10, the pressing height utilization of the push rod assembly 20 is further enhanced.

[0155] In some embodiments, please refer to Figure 13 In the initial retracted position, the orthographic projection of the nut 35 and the rotor 11 on any plane parallel to the axial direction at least partially overlaps. That is, the nut 35 extends into the hollow region of the rotor 11, resulting in a large overlap length between the motor assembly 10 and the nut 35 in the axial direction. Thus, while maintaining the same push rod length, this embodiment can further reduce the axial dimensions of the cardiopulmonary resuscitation device, making the structure more compact. Alternatively, please refer to... Figure 5 and Figure 11 The nut 35 is located on the side of the rotor 11 facing the pressing structure 22 in the axial direction, that is, the orthogonal projection of the nut 35 and the rotor 11 on any plane parallel to the axial direction does not coincide.

[0156] In some embodiments, please refer to Figures 5 to 14 The end of the lead screw 30 near the motor assembly 10 passes through or is housed in the hollow region of the rotor 11 along the axial direction.

[0157] The rotor 11 has a first end face and a second end face on opposite sides in the axial direction, wherein the first end face faces the side where the push rod assembly 20 is located, and the second end face is opposite to the first end face.

[0158] It should be noted that when the axial end of the lead screw 30 near the motor assembly 10 passes through the hollow region of the rotor 11, it means that the axial end of the lead screw 30 extends into the hollow region of the rotor 11 and exceeds the second end face of the rotor 11. When the axial end of the lead screw 30 near the motor assembly 10 is axially housed in the hollow region of the rotor 11, it means that the axial end of the lead screw 30 extends into the hollow region of the rotor 11 and does not exceed the second end face of the rotor 11.

[0159] In this embodiment, regardless of whether the shaft end of the lead screw 30 exceeds the second end face of the rotor 11, the orthogonal projections of the lead screw 30 and the rotor 11 on any plane parallel to the axial direction at least partially overlap. Thus, while keeping the dimensions of the motor assembly 10 and the lead screw 30 unchanged, the axial space occupied by the rotor 11 and the lead screw 30 after assembly can be reduced, which is beneficial to reducing the axial dimensions of the cardiopulmonary resuscitation device and to the miniaturization design of the cardiopulmonary resuscitation device.

[0160] In some embodiments, please refer to Figures 5 to 14 A portion of the connecting structure 40 passes through or is housed in the hollow region of the rotor 11.

[0161] It should be noted that "a portion of the connecting structure 40 passes through the hollow region of the rotor 11" means that a portion of the connecting structure 40 extends axially into the hollow region of the rotor 11 and exceeds the second end face of the rotor 11. "A portion of the connecting structure 40 is housed within the hollow region of the rotor 11" means that a portion of the connecting structure 40 extends axially into the hollow region of the rotor 11 and does not exceed the second end face.

[0162] Regardless of whether the shaft end of rotor 11 extends beyond the second end face of rotor 11, in this embodiment, the orthogonal projection of connecting structure 40 and rotor 11 on any plane parallel to the axial direction has an overlapping area. Thus, while keeping the dimensions of motor assembly 10, lead screw 30, push rod assembly 20, etc., unchanged, the axial space occupied by rotor 11 and connecting structure 40 after assembly can be reduced, which is beneficial to reducing the axial size of cardiopulmonary resuscitation device and to miniaturizing the design of cardiopulmonary resuscitation device.

[0163] In some embodiments, the connecting structure 40 includes a connecting end 42 and a connecting cylinder 41. The connecting cylinder 41 has an opening 41a at one end facing the pressing structure 22. The connecting end 42 is located at the end of the cylinder away from the opening 41a. The connecting end 42 passes through or is accommodated in the hollow region of the rotor 11. The end of the lead screw 30 near the rotor 11 passes through or is accommodated in the connecting end 42. In the initial retracted position, the nut 35 and the guide sleeve 60 are inserted into the connecting cylinder 41 through the opening 41a of the connecting structure 40.

[0164] "Connecting end 42 passing through the hollow region of rotor 11" means that, in the axial direction away from push rod assembly 20, connecting end 42 extends beyond the axial end face of rotor 11 away from push rod assembly 20. "Connecting end 42 being accommodated in the hollow region of rotor 11" means that connecting end 42 extends into the hollow region, and connecting end 42 does not exceed the axial end face of rotor 11 away from push rod assembly 20.

[0165] "The end of the lead screw 30 near the rotor 11 passes through the connecting end 42" means that the shaft end of the lead screw 30 extends beyond the end face of the connecting end 42 away from the connecting cylinder 41. "The end of the lead screw 30 near the rotor 11 is housed in the connecting end 42" means that the shaft end of the lead screw 30 extends into the connecting end 42 but does not extend beyond the end face of the connecting end 42 away from the connecting cylinder 41.

[0166] In this embodiment, the construction of the connecting structure 40 is beneficial to protecting the push rod assembly 20, the lead screw 30, and the guide sleeve 60. Specifically, in the initial contraction position, the connecting cylinder 41 provides radial limiting for the guide sleeve 60 and the lead screw nut 35, and in turn provides radial limiting for the push rod assembly 20, reducing the possibility of radial deflection.

[0167] In this embodiment, at the initial retracted position, the orthographic projections of the connecting structure 40 and the rotor 11 on any plane parallel to the axial direction coincide, and the orthographic projections of the lead screw 30 and the connecting end 42 on any plane parallel to the axial direction coincide, the orthographic projections of the lead nut 35 and the connecting cylinder 41 on any plane parallel to the axial direction coincide, and the orthographic projections of the guide sleeve 60 and the connecting cylinder 41 on any plane parallel to the axial direction also coincide. In this way, the axial space can be fully utilized, and the axial space occupied by the rotor 11, connecting structure 40, lead screw 30, guide sleeve 60, lead nut 35, etc. after assembly can be reduced. This is beneficial to reducing the axial size of the cardiopulmonary resuscitation device and is conducive to the miniaturization design of the cardiopulmonary resuscitation device.

[0168] The first bearing 71 includes an inner ring, an outer ring, and rolling elements. The outer ring is disposed around the outer periphery of the inner ring, and the rolling elements are radially disposed between the inner and outer rings, allowing the inner and outer rings to rotate relative to each other. The inner ring is fitted around the outer periphery of the connecting structure 40, and the inner ring and the connecting structure 40 are relatively fixed, meaning they will not rotate relative to each other. The outer ring is fixed to some mounting structure that does not require movement, such as the housing 13 of the motor assembly 10, the sleeve 50 mentioned below, the bearing seat 72 mentioned below, etc. Any structure that does not require movement can be used to fix the outer ring.

[0169] Please see Figure 8 The first bearing 71 has a first shaft end face 71a on the side facing the pressing structure 22, and a second shaft end face 71b on the side away from the pressing structure 22, that is, the first shaft end face 71a and the second shaft end face 71b are opposite to each other.

[0170] In some embodiments, please refer to Figures 11 to 13 The first bearing 71 is located on the outside of the housing 13 and is axially located on the side of the housing 13 facing the pressing structure 22. In other words, the first bearing 71 does not occupy the internal space of the housing 13.

[0171] In other embodiments, please refer to Figures 5 to 10 The first bearing 71 is at least partially disposed inside the housing 13 and radially disposed between the connecting structure 40 and the housing 13. For example, the inner ring of the first bearing 71 is fixed to the connecting structure 40, and the outer ring is fixed to the housing 13 of the motor assembly 10. In this embodiment, the first bearing 71 can make full use of the internal space of the housing 13, reduce the impact of the first bearing 71 on the axial dimension of the cardiopulmonary resuscitation device, and help reduce the axial dimension of the cardiopulmonary resuscitation device.

[0172] The nut 35 has a first axial surface and a second axial surface at both ends along the axial direction, wherein the first axial surface is located on the side of the nut 35 facing the pressing structure, and the second axial surface is opposite to the first axial surface.

[0173] In some embodiments, please refer to Figure 5 , Figure 11 as well as Figure 13 In the initial contracted position, at least a portion of the nut 35 extends beyond the first shaft end face 71a in an axial direction away from the pressing structure 22. That is, in the initial contracted position, the second shaft surface of the nut 35 extends beyond the first shaft end face 71a of the first bearing 71 in an axial direction away from the pressing structure 22. It should be noted that in this embodiment, there is no restriction on whether the second shaft surface of the nut 35 exceeds the second shaft end face 71b. That is, in the initial contracted position, the orthographic projections of the nut 35 and the first bearing 71 on any plane parallel to the axial direction can at least partially coincide in the axial direction. For example, the second shaft surface of the nut 35 does not exceed the second shaft end face 71b of the first bearing 71, or both the first and second shaft surfaces of the nut 35 exceed the first shaft end face 71a of the first bearing 71, but the first shaft surface of the nut 35 does not exceed the second shaft end face 71b of the first bearing 71, or the first shaft surface of the nut 35 does not exceed the first shaft end face 71a of the first bearing 71, or in the initial contracted position, the orthographic projections of the nut 35 and the first bearing 71 on any plane parallel to the axial direction can also not coincide in the axial direction and the nut 35 is located on the side of the first bearing 71 away from the pressing structure 22 in the axial direction, that is, the first shaft surface of the nut 35 also exceeds the second shaft end face 71b of the first bearing 71.

[0174] Specifically, when the nut 35 and the push rod assembly 20 move from the extreme extension position to the initial retracted position, the nut 35 gradually approaches the first bearing 71, and the second shaft surface extends beyond the first shaft end face 71a along the direction of movement. In this way, the nut 35 and the push rod assembly 20 can make full use of the axial space of the first bearing 71, which is beneficial to reducing the axial size of the cardiopulmonary resuscitation device.

[0175] It should be noted that the nut 35 does not interfere with the first bearing 71 during its movement.

[0176] It should be noted that in the above embodiments, when the nut 35 and the push rod assembly 20 move to the initial contraction position, the second shaft surface of the nut 35 may or may not exceed the second shaft end face 71b.

[0177] In some embodiments, please refer to Figure 5 and Figure 11 At the initial contraction position, the orthographic projections of the nut 35, the first bearing 71, and the guide sleeve 60 on any plane parallel to the axial direction at least partially overlap.

[0178] In other embodiments, please refer to Figure 13 In the initial contracted position, the entire nut 35 extends beyond the second shaft end face 71b of the first bearing 71 along the axial direction and away from the pressing structure 22. That is, the first shaft surface of the nut 35 extends beyond the second shaft end face 71b of the first bearing 71 along the axial direction and away from the pressing structure 22. In other words, the orthographic projections of the nut 35 and the first bearing 71 on any plane parallel to the axial direction do not coincide. Thus, the nut 35 is closer to the rotor 11 in the axial direction, which helps to reduce the axial size of the cardiopulmonary resuscitation device and facilitates the miniaturization design of the cardiopulmonary resuscitation device.

[0179] In some embodiments, please refer to Figure 11 and Figure 12 The nut 35 is disposed on the outside of the housing 13 and is located axially on the side of the housing 13 facing the pressing structure 22. That is, within the axial movement range of the nut 35, the nut 35 is always located axially on the side of the housing 13 facing the pressing structure 22, that is, the nut 35 will never move into the interior of the housing 13.

[0180] In other embodiments, please refer to Figure 5 and Figure 13 In the initial retracted position, the nut 35 extends into the interior of the motor assembly 10. For example, for the orthographic projection of the nut 35, housing 13, rotor 11, and stator 12 onto any plane parallel to the axial direction, at least a portion of the nut 35 may coincide only with a portion of the housing 13, but not with the rotor 11 or the stator 12. As another example, for the orthographic projection of the nut 35, housing 13, rotor 11, and stator 12 onto any plane parallel to the axial direction, at least a portion of the nut 35 may coincide not only with a portion of the housing 13, but also with the stator 12, but not with the rotor 11. Yet another example, for the orthographic projection of the nut 35, housing 13, rotor 11, and stator 12 onto any plane parallel to the axial direction, at least a portion of the nut 35 may coincide not only with a portion of the housing 13, but also with the stator 12 and the rotor 11.

[0181] In some embodiments, the cardiopulmonary resuscitation device further includes a sleeve 50, which is fitted around the outer periphery of the guide sleeve 60 and fixed relative to the stator 12. That is, the sleeve 50 and the stator 12 will not move relative to each other, nor will the sleeve 50 and the housing 13 of the motor assembly 10 move relative to each other. In other words, the sleeve 50 will not move during the movement of the push rod assembly 20. The push rod body 21 is at least partially located within the sleeve 50, meaning that regardless of the position to which the push rod body 21 moves, a portion of the push rod body 21 is always located within the sleeve 50.

[0182] On the one hand, the sleeve 50 helps to provide radial positioning for the guide sleeve 60 and the push rod body 21 during the movement of the push rod body 21, reducing the probability of radial deflection of the guide sleeve 60 and the push rod body 21. On the other hand, the sleeve 50, guide sleeve 60 and push rod body 21 are arranged in a layered configuration, which helps to reduce the radial dimension of the assembled sleeve 50, guide sleeve 60 and push rod body 21, and facilitates the miniaturization of the cardiopulmonary resuscitation device along the radial dimension.

[0183] It should be noted that the cross-sectional shapes of the sleeve 50, guide sleeve 60, and push rod body 21 can be the same or different in a cross-section perpendicular to the axial direction. When the cross-sectional shapes of the sleeve 50, guide sleeve 60, and push rod body 21 are the same, for example, they are all circular or polygonal, the radial dimension can be further reduced.

[0184] For example, please refer to Figures 5 to 14 The first bearing 71 and the sleeve 50 have at least partial overlap in their orthogonal projections on any plane parallel to the axial direction. In this embodiment, the sleeve 50 and the first bearing 71 can share a portion of the installation space in the axial direction, which is beneficial for reducing the axial size of the cardiopulmonary resuscitation device and for miniaturizing the design of the cardiopulmonary resuscitation device.

[0185] For example, please refer to Figures 5 to 14 The sleeve 50 is inserted into the connecting cylinder portion 41 through the opening 41a of the connecting structure 40. In this embodiment, on the one hand, the sleeve 50 and the connecting cylinder portion 41 can share a portion of the installation space in the axial direction, which is beneficial to reducing the axial size of the cardiopulmonary resuscitation device and facilitating its miniaturization design. On the other hand, the connecting end 42 acts as a shield for the end of the sleeve 50, reducing the entry of dust, parts, and other accidental objects into the sleeve 50. The sleeve 50, the connecting structure 40, and the push rod body 21 form a relatively enclosed space, allowing the lead screw 30 to reside within this relatively enclosed space. This reduces the probability of the lead screw 30 being exposed to the external environment and the likelihood of corrosion caused by contact with moisture, dust, and other impurities, thus extending the service life of the lead screw 30.

[0186] For example, please refer to Figure 5 , Figure 11 as well as Figure 13In the initial contracted position, the guide sleeve 60 is at least partially located within the sleeve 50; see also Figure 9 , Figure 10 , Figure 12 and Figure 14 The push rod assembly 20 also has a limit extension position, in which the guide sleeve 60 extends partially out of the sleeve 50. That is, the guide sleeve 60 can move axially relative to the sleeve 50.

[0187] The extreme extension position refers to the position where the guide sleeve 60, the nut 35, and the push rod body 21 move away from the first bearing 71 (i.e., towards the pressing structure 22) to the extreme position designed for the product.

[0188] In this embodiment, at the extreme extension position, the guide sleeve 60 extends out of the sleeve 50. Since the guide sleeve 60 is fitted around the outer periphery of the push rod body 21, the part of the guide sleeve 60 extending out of the sleeve 50 can continue to guide the movement and provide radial positioning for the push rod body 21, reducing the cantilever length of the push rod body 21 when it is at the extreme extension position, increasing the lateral stiffness of the push rod body 21, reducing the possibility of lateral sway of the push rod body 21, and improving the movement stability of the push rod body 21.

[0189] It should be noted that if the guide sleeve 60 is not provided, the distance between the end of the push rod body 21 connected to the pressing structure 22 and the end of the sleeve 50 near the pressing structure 22 is the cantilever length. If the guide sleeve 60 is provided, the distance between the end of the push rod body 21 connected to the pressing structure 22 and the end of the guide sleeve 60 near the pressing structure 22 is the cantilever length.

[0190] Therefore, in the embodiment where the guide sleeve 60 is provided, the cantilever length of the push rod body 21 at the extreme extension position can be effectively reduced, the force conditions of the push rod body 21 can be improved, and the motion stability of the push rod body 21 can be enhanced.

[0191] For example, in the initial contraction position, the end of the guide sleeve 60 near the pressing structure 22 can be completely located inside the sleeve 50. In this way, the guide sleeve 60 does not affect the distance between the pressing structure 22 and the end of the sleeve 50 near the pressing structure 22. This is beneficial for the pressing structure 22 to be as close as possible to the end of the sleeve 50 in the initial contraction position, thereby minimizing the axial size of the cardiopulmonary resuscitation device and facilitating the miniaturization design of the cardiopulmonary resuscitation device.

[0192] For example, anti-rotation structures are provided between the push rod body 21 and the guide sleeve 60, and between the guide sleeve 60 and the sleeve 50, respectively. That is, there is no relative rotation between the push rod body 21 and the guide sleeve 60, and there is no relative rotation between the guide sleeve 60 and the sleeve 50. It should be noted that the anti-rotation structure refers to the general term for structures that prevent relative rotation between two components, and the anti-rotation structure does not specifically limit the relative movement of the two components along the axial direction.

[0193] The specific structure of the anti-rotation structure is not limited; any existing structure capable of preventing rotation can be used. For example, in some embodiments, two components are radially connected by screws or other connectors. In this case, the two components can prevent rotation both circumferentially and axially (i.e., there is no relative axial movement). In other embodiments, the mating parts of the two components use non-circular shapes to prevent relative rotation. In still other embodiments, anti-rotation can be achieved through mating methods such as flat keys or keyways.

[0194] In some embodiments, the guide sleeve 60 can move linearly along the axial direction relative to the sleeve 50. That is, although the guide sleeve 60 and the sleeve 50 cannot rotate relative to each other, they can move relative to each other along the axial direction. This facilitates the guide sleeve 60 extending axially out of the sleeve 50, which is convenient for guiding the movement and radially positioning the push rod body 21.

[0195] In some embodiments, the guide sleeve 60 is movably connected to the push rod assembly 20, allowing the guide sleeve 60 to move linearly along the axial direction relative to the push rod assembly 20. That is, although the guide sleeve 60 and the push rod assembly 20 cannot rotate relative to each other, they can move relative to each other along the axial direction. This relative axial movement ensures that, in the initial retracted position, the guide sleeve 60 and the push rod assembly 20 occupy a shorter axial space. In the extreme extended position, the movement of the guide sleeve 60 ensures the lateral stiffness of the push rod assembly 20, allowing it to extend a longer distance from the sleeve 50, resulting in a longer stroke and a shorter cantilever length, thus improving the smoothness of the push rod assembly 20's movement.

[0196] For example, please refer to Figure 3 The guide sleeve 60 is provided with a first stop structure 61 and a second stop structure 62. The first stop structure 61 is located on the side of the second stop structure 62 that is axially closer to the pressing structure 22. That is, the first stop structure 61 and the second stop structure 62 are arranged at intervals along the axial direction. It should be noted that the orthographic projections of the first stop structure 61 and the second stop structure 62 on a plane perpendicular to the axial direction of the guide sleeve 60 can at least partially coincide, or they can be staggered.

[0197] Please see Figure 3The cardiopulmonary resuscitation device also includes a connector 23, which is disposed on the outer periphery of the push rod assembly 20. (See also...) Figure 6 , Figure 7 , Figure 8 The connector 23 extends into the gap region between the first stop structure 61 and the second stop structure 62, and the connector 23 is capable of linear axial movement within the gap region. In this embodiment, the axial movement distance of the connector 23 within the gap region is the axial relative movement distance between the guide sleeve 60 and the push rod assembly 20. It should be noted that the axial length of the gap region can be greater than or equal to the axial movement distance of the connector 23 within the gap region.

[0198] In some embodiments, please refer to Figure 6 In the initial contracted position, the second stop structure 62 abuts against the connector 23 on the axial side away from the pressing structure 22, so that the connector 23 bears at least part of the weight of the guide sleeve 60. That is, in the initial contracted position, the guide sleeve 60 is hooked onto the connector 23 by the second stop structure 62, and the connector 23 achieves axial positioning of the guide sleeve 60.

[0199] Specifically, please refer to the description of the state of the guide sleeve 60 and the push rod assembly 20 in the initial retracted position. Figure 6 When rotor 11 starts to rotate forward, rotor 11 drives lead screw 30 to rotate forward through connecting structure 40. Nut 35 drives push rod assembly 20 to move away from rotor 11. As push rod assembly 20 moves, guide sleeve 60 also moves away from rotor 11 under its own weight. When guide sleeve 60 moves to its limit position within sleeve 50 (…),… Figure 7 (as shown in the image), that is, from Figure 6 Move to the position shown Figure 7 At the position shown, the guide sleeve 60 can no longer move further away from the rotor 11, and the connecting piece 23 continues to move away from the rotor 11 along with the push rod assembly 20, separating from the second stop structure 62. The connecting piece 23 continues to move away from the rotor 11 along with the push rod assembly 20, and the push rod assembly 20 moves relative to the guide sleeve 60. Figure 7 Move to the position shown Figure 9 The indicated limit extension position.

[0200] In some embodiments, when the push rod assembly 20 moves to the point where the connecting member 23 contacts the first stop structure 61, the first stop structure 61 prevents the connecting member 23 from moving further downward, thereby preventing the push rod assembly 20 from moving further downward. This position is the limit extension position of the push rod assembly 20. In other embodiments, the maximum angle of rotation of the rotor 11 can be controlled (one rotation is 360°, N rotations equal N*360°). When the rotor 11 reaches the maximum angle, it stops rotating, and the push rod assembly 20 moves to its limit extension position. At this point, the connecting member 23 may not yet be in contact with the first stop structure 61, or it may just be in contact with it. In still other embodiments, other stop structures can be provided. When either the nut 35 or the push rod assembly 20 moves downward to contact the stop structure, the push rod assembly 20 moves to its limit extension position.

[0201] For example, the push rod assembly 20 from Figure 9 The indicated limit extension position is moved to Figure 5 and Figure 6 The process of the initial contraction position shown is as follows: the rotor 11 reverses, which drives the lead screw 30 to reverse through the connecting structure 40. The lead screw 30 drives the lead screw nut 35 and the push rod assembly 20 to move linearly in the direction close to the rotor 11. The connecting member 23 moves between the first stop structure 61 and the second stop structure 62. When the connecting member 23 moves to contact the second stop structure 62, the connecting member 23 drives the guide sleeve 60 to move in the direction close to the rotor 11 until it moves to the position shown. Figure 5 and Figure 6 The initial contraction position is shown.

[0202] In other embodiments, at the initial retracted position, the connector 23 may not be in contact with the second stop structure 62, or the second stop structure 62 may not be provided, and the bottom end of the guide sleeve 60 (the end closer to the pressing structure 22) may be supported on the pressing structure 22. Specifically, when the push rod assembly 20 begins to retract from its extreme extension position, when it moves to the point where the pressing structure 22 contacts the bottom end of the guide sleeve 60, the pressing structure 22 drives the guide sleeve 60 to move towards the motor assembly 10 until it reaches the initial retracted position.

[0203] In some embodiments, please refer to Figure 3 , Figure 6 and Figure 7 The guide sleeve 60 has a guide groove 60a on its side wall, which extends axially. The connector 23 extends into the guide groove 60a and can move linearly axially within it. The groove wall of the guide groove 60a near the pressing structure 22 forms at least a portion of the first stop structure 61, and the groove wall of the guide groove 60a away from the pressing structure 22 forms at least a portion of the second stop structure 62.

[0204] In this embodiment, the guide groove 60a does not affect the radial dimension of the guide sleeve 60, therefore, it does not affect the fit between the inner circumferential surface of the guide sleeve 60 and the outer circumferential surface of the push rod body 21, and the structure is simple. Furthermore, the connector 23 extending into the guide groove 60a also achieves an anti-rotation effect between the guide sleeve 60 and the push rod body 21, preventing relative rotation between them. In other words, the guide groove 60a and the connector 23 are equivalent to the aforementioned anti-rotation structure. Moreover, the fit between the connector 23 and the guide groove 60a also provides axial guidance. That is, the fit between the guide groove 60a and the connector 23 simultaneously provides axial stopping, circumferential anti-rotation, and axial movement guidance.

[0205] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 11 , Figure 13 The guide sleeve 60 has a first limiting structure 63 on its outer peripheral surface. The cardiopulmonary resuscitation device also includes a second limiting structure 52 that cooperates with the first limiting structure 63. The first limiting structure 63 and the second limiting structure 52 are used to limit the distance of linear movement of the guide sleeve 60 along the axial direction towards the side close to the pressing structure 22 within the sleeve 50. Specifically, when the guide sleeve 60 moves towards the side close to the pressing structure 22, when it moves to the point where the first limiting structure 63 contacts the second limiting structure 52, the second limiting structure 52 prevents the guide sleeve 60 from continuing to move. At this time, the guide sleeve 60 moves to its limit position relative to the sleeve 50.

[0206] The specific implementation of the first limiting structure 63 and the second limiting structure 52 is not limited.

[0207] In some embodiments, the first limiting structure 63 is a stepped surface formed on the outer peripheral surface of the guide sleeve 60, the stepped surface being located on the side of the guide sleeve 60 near the pressing structure 22, and the second limiting structure 52 is a protrusion extending radially inward from the inner peripheral surface of the sleeve 50. It is understood that the stepped surface can be a continuous annular stepped surface surrounding the outer periphery of the guide sleeve 60, or it can be discontinuous in the circumferential direction of the guide sleeve 60.

[0208] It should be noted that the second limiting structure 52 is a protrusion that protrudes radially inward from the inner circumferential surface of the sleeve 50. This means that the orthographic projection of the second limiting structure 52 on the plane perpendicular to the axial direction of the sleeve 50 extends radially inward beyond the orthographic projection of the inner circumferential surface of the sleeve 50 on the plane perpendicular to the axial direction of the sleeve 50.

[0209] In some embodiments, please refer to Figure 3 , Figure 5 , Figure 11 as well as Figure 13The cardiopulmonary resuscitation device includes an end cap 53 disposed at one end of the sleeve 50 near the pressing structure 22, through which the push rod body 20 passes. Exemplarily, a portion of the inner circumference of the end cap 53 extends radially beyond the inner circumferential surface of the sleeve 50, thereby forming the aforementioned second limiting structure 52.

[0210] In some embodiments, the end cap 53 and the sleeve 50 are separate structures that are connected to each other, meaning that they are independent components.

[0211] In other implementations, at least part of the structure of the end cap 53 and the sleeve 50 is an integral structure.

[0212] It should be noted that you should refer to [link / reference]. Figure 3 and Figure 4 The outer circumferential surface of the guide sleeve 60 is also provided with a clearance structure 64 to avoid the second limiting structure 52. In this way, before the first limiting structure 63 and the second limiting structure 52 come into contact, the second limiting structure 52 cooperates with the clearance structure 64 to prevent the second limiting structure 52 from interfering with the guide sleeve 60.

[0213] For example, the guide sleeve 60 is generally cylindrical in shape, and a portion of the outer surface of the cylindrical structure is scraped off on the side near the pressing structure 22, forming a clearance structure 64 after the scraped portion; at the end axially close to the motor assembly 10, a first limiting structure 63 is formed at the junction of the scraped portion and the unscraped portion.

[0214] The cooperation of the second limiting structure 52 and the avoidance structure 64 can also play a role in preventing rotation, preventing relative rotation between the guide sleeve 60 and the sleeve 50. In other words, the second limiting structure 52 and the avoidance structure 64 are equivalent to the anti-rotation structure between the guide sleeve 60 and the sleeve 50 mentioned above.

[0215] In some embodiments, the sleeve 50 and the outer shell 13 are an integral structure. For example, they are integrally injection molded.

[0216] In other embodiments, the sleeve 50 and the outer shell 13 are separate structures, that is, they are independent components.

[0217] In some embodiments, please refer to Figure 11 and Figure 12 The motor assembly 10 is located axially at the end of the sleeve 50 away from the pressing structure 22. The sleeve 50 is integrally disposed outside the housing 13 and is located axially on the side of the housing 13 facing the pressing structure 22. In this way, the radial dimension of the sleeve 50 does not affect the size of the housing 13 of the motor assembly 10, which is beneficial to maintaining the overall miniaturization of the motor assembly 10.

[0218] In other embodiments, please refer to Figure 13 and Figure 14A portion of the sleeve 50 is disposed inside the housing 13, and the sleeve 50 at least partially overlaps with the orthographic projection of the rotor 11 on any plane parallel to the axial direction. In this embodiment, the sleeve 50 extends into the hollow region of the rotor 11, which helps to reduce the axial dimension of the cardiopulmonary resuscitation device.

[0219] In some other embodiments, please refer to Figures 5 to 10 A portion of the sleeve 50 is disposed inside the housing 13, and the entire sleeve 50 is located axially on the side of the rotor 11 facing the pressing structure 22. That is to say, the sleeve 50 does not extend into the rotor 11, and the size of the sleeve 50 does not affect the size of the rotor 11, which is conducive to maintaining the miniaturization of the rotor 11. In addition, since a portion of the sleeve 50 is disposed inside the housing 13, the axial size of the cardiopulmonary resuscitation device can also be reduced to a certain extent.

[0220] In some embodiments, a flange 51 is provided on the outer periphery of the sleeve 50 near the end of the motor assembly 10, and the flange 51 extends radially outward. The flange 51 and the sleeve 50 can be an integral structure, such as an integral plastic part; or they can be separate structures connected together.

[0221] In some embodiments, the flange 51 is disposed on the outside of the housing 13 and is located axially on the side of the housing 13 facing the pressing structure 22; the housing 13 is directly or indirectly connected to the flange 51. The weight of the motor assembly 10 can be directly or indirectly transmitted through the housing 13 to the flange 51, and then to the sleeve 50, that is, the sleeve 50 can provide mounting support for the motor assembly 10.

[0222] In some embodiments, please refer to Figures 11 to 14 The first bearing 71 is located outside the housing 13 and axially toward the pressing structure 22. The first bearing 71 is axially disposed between the housing 13 and the flange 51. That is, in this embodiment, the first bearing 71 does not extend into the motor assembly 10.

[0223] In some embodiments, the cardiopulmonary resuscitation device includes a connecting post connected to the housing 13. The connecting post extends axially from the housing 13 toward the pressing structure 22, and connects the housing 13 and the flange 51. In this embodiment, the weight of the motor assembly 10 is transferred to the flange 51 via the connecting post. It should be noted that the connecting post needs to avoid the first bearing 71 disposed between the housing 13 and the flange 51. Furthermore, in this embodiment, some structures can be provided on the flange 51 to facilitate the fixing of the outer ring of the first bearing 71. For example, while connecting the housing 13 and the flange 51 via the connecting post, the outer ring of the first bearing 71 can also be fixed via the connecting post. Of course, other structures can also be added to fix the outer ring of the first bearing 71.

[0224] In some embodiments, please refer to Figures 11 to 14The cardiopulmonary resuscitation device also includes a bearing housing 72, with a first bearing 71 disposed in the bearing housing 72, and the bearing housing 72 providing mounting support for the first bearing 71.

[0225] In some embodiments, please refer to Figure 11 and Figure 12 The cardiopulmonary resuscitation device includes a connecting post 54 connected to the housing 13. The connecting post 54 extends axially from the housing 13 toward the pressing structure 22 and connects the housing 13 and the bearing seat 72. In this embodiment, the weight of the motor assembly 10 is transferred to the bearing seat 72 via the connecting post 54, and then to the flange 51 via the bearing seat 72.

[0226] In other embodiments, please refer to Figure 13 and Figure 14 The bearing housing 72 is directly connected to the flange 51 and the housing 13. That is to say, in this embodiment, the connecting post 54 mentioned above can be eliminated, and the weight of the motor assembly 10 is directly transferred to the bearing housing 72 through the housing 13, and then transferred to the flange 51 through the bearing housing 72.

[0227] In some embodiments, please refer to Figures 4 to 10 The housing 13 is directly connected to the flange 51, and the first bearing 71 is disposed inside the housing 13 and radially between the housing 13 and the connecting structure 40. In this embodiment, the weight of the motor assembly 10 is directly transmitted to the flange 51 through the housing 13. This further reduces the axial size of the cardiopulmonary resuscitation device, facilitating its miniaturization design.

[0228] In some embodiments, the rotor 11 and the connecting structure 40 are an integral structure; or, the rotor 11 and the connecting structure 40 are separate structures connected together, for example, by means of screws, bolts, welding, etc., which is not limited here.

[0229] In some embodiments, the cardiopulmonary resuscitation device further includes a detection structure 80, which is used to detect the rotation angle of at least one of the rotor 11, connecting structure 40, and lead screw 30. It should be noted that the rotation angles of the rotor 11, connecting structure 40, and lead screw 30 are synchronized and identical, and the rotation angle has a definite relationship with the travel distance of the push rod assembly 20. Therefore, by detecting the rotation angle, the travel distance of the push rod assembly 20 can be determined, and by controlling the angle of the rotor 11, the travel distance of the push rod assembly 20 can also be controlled. For example, the compression depth of the compression structure 22 differs for children and adults; therefore, by detecting the angle information of the structure 80, the rotation angle of the rotor 11 can be controlled, thereby controlling the compression distance of the compression structure 22.

[0230] The specific type of the detection structure 80 is not limited; for example, it can be an encoder.

[0231] In some embodiments, please refer to Figures 5 to 10 The detection structure 80 is at least partially located radially inside the stator 12, and is fitted around the outer periphery of the connecting structure 40. In this embodiment, the detection structure 80 is hollow, for example, it can be a hollow encoder, and at least a portion of the connector 23 extends into the detection structure 80. Specifically, in some embodiments, when the connecting structure 40, stator 12, rotor 11, and housing 13 are assembled together, there will still be a portion of unused space between the radially inside the stator 12 and the outer periphery of the connecting structure 40. This space can accommodate the detection structure 80, thus saving the axial installation space required for the detection structure 80 and rotor 11, which is beneficial for reducing the axial dimensions of the cardiopulmonary resuscitation device.

[0232] In other embodiments, the detection structure 80 is located axially on the side of the stator 12 away from the pressing structure 22. For example, the detection structure 80 may be located inside the housing 13 or outside the housing 13. Specifically, a protective shell may be added to the outside of the housing 13, and the protective shell may be connected to the housing 13 to house the detection structure 80 inside the protective shell.

[0233] In some embodiments, the cardiopulmonary resuscitation device further includes a second bearing 73, which is disposed on the outer periphery of the connecting structure 40 or on the outer periphery of the end of the lead screw 30 near the motor assembly 10, and the second bearing 73 is axially located on the side of the rotor 11 away from the first bearing 71, and the first bearing 71 and the second bearing 73 are coaxially arranged.

[0234] In this embodiment, the first bearing 71 and the second bearing 73 can enhance the stability of the lead screw 30 and reduce the probability of the lead screw 30 swaying.

[0235] In this embodiment, two bearings (first bearing 71 and second bearing 73) provide support for both the rotation of the rotor 11 and the rotation of the lead screw 30 and push rod assembly 20. Generally, a rotor with a hollow region (which can be understood as the rotor of a frameless motor) requires two bearings, and a transmission system consisting of a lead screw and push rod assembly requires one bearing. That is, applying a frameless motor to a transmission system consisting of a lead screw and push rod assembly generally requires at least three bearings in total. However, the embodiment of this application, through clever design, uses the first bearing 71 and the second bearing 72 to jointly support the connecting structure 40, the rotor 11, the lead screw 30, and the push rod assembly 20, reducing the number of bearings, simplifying the structure, and reducing the axial dimension of the cardiopulmonary resuscitation device, which is beneficial for achieving overall miniaturization of the cardiopulmonary resuscitation device.

[0236] Please see Figure 5The first bearing 71 and the second bearing 73 are both located on the outer periphery of the connecting structure 40. That is, the first bearing 71 and the second bearing 73 are assembled on the same structure, which is beneficial to control the assembly accuracy and coaxiality, and also helps to improve the stability of the rotor 11 rotation, thereby improving the overall stability of the cardiopulmonary resuscitation device.

[0237] The following is a brief description of three specific embodiments of this application with reference to the accompanying drawings. Other structures are described above and will not be repeated here.

[0238] First Embodiment

[0239] Please see Figure 1-10 .

[0240] The end of the sleeve 50 away from the pressing structure 22 extends into the housing 13 of the motor assembly 10, and extends into the connecting sleeve 41 from the opening 41a of the connecting sleeve 41.

[0241] The housing 13 is directly connected to the flange 51. The weight of the motor assembly 10 can be directly transferred to the flange 51 through the housing 13.

[0242] The first bearing 71 is located inside the housing 13 and is located radially between the housing 13 and the connecting cylinder 41.

[0243] The end of the lead screw 30 away from the pressing structure 22 passes through the hollow region of the rotor 11, and the second bearing 73 is sleeved on the outer periphery of the portion of the connecting structure 40 that extends axially beyond the rotor 11. Specifically, the inner ring of the first bearing 71 is fixed to the outer periphery of the connecting cylinder portion 41, and the inner ring of the second bearing 73 is fixed to the outer periphery of the connecting end 42. That is to say, both the first bearing 71 and the second bearing 73 are sleeved on the outer periphery of the connecting structure 40.

[0244] The connecting end 42 of the connecting structure 40 passes through the hollow region of the rotor 11.

[0245] In the initial contracted position, the nut 35 and the guide sleeve 60 extend into the connecting cylinder 41 from the opening 41a of the connecting cylinder 41.

[0246] The detection structure 80 is located inside the housing 13 and on the side of the rotor 11 away from the push rod assembly 20. Specifically, the detection structure 80 is located between the radially inner side of the stator 12 and the outer periphery of the connecting end 42.

[0247] In this embodiment, it is not necessary to configure a bearing housing 72 for the first bearing 71.

[0248] Second Embodiment

[0249] Please see Figure 11 and Figure 12The first bearing 71 is located outside the housing 13 and between the housing 13 and the flange 51. The first bearing 71 is disposed in the bearing housing 72, and the housing 13 and the bearing housing 72 are connected by the connecting post 54. The second bearing 73 surrounds the outer periphery of the connecting end 42.

[0250] The end of the sleeve 50 away from the pressing structure 22 is located outside the housing 13, meaning that their orthogonal projections in any plane parallel to the axial direction do not coincide. The sleeve 50 passes through the first bearing 71 axially, meaning that the first bearing 71 surrounds the outer periphery of the sleeve 50.

[0251] The nut 35, guide sleeve 60, and push rod assembly 20 are all located outside the housing 13, on the side of the housing 13 facing the pressing structure 22. In orthographic projection onto any plane parallel to the axial direction, the sleeve 50 does not coincide with the motor assembly 10. In the initial retracted position, the guide sleeve 60 and the motor assembly 10 do not coincide, and the nut 35 does not coincide with the motor assembly 10, but the nut 35 partially coincides with the first bearing 71.

[0252] The connecting end 42 passes through the hollow region of the rotor 11, and the end of the lead screw 30 is accommodated in the connecting end 42.

[0253] Third Embodiment

[0254] Please see Figure 13 and Figure 14 The sleeve 50 extends into the housing 13 of the motor assembly 10 at one end away from the pressing structure 22, and extends into the connecting sleeve 41 from the opening 41a of the connecting sleeve 41.

[0255] The first bearing 71 is located outside the housing 13 and between the housing 13 and the flange 51. The first bearing 71 is disposed in the bearing housing 72, the housing 13 is connected to the bearing housing 72, and the bearing housing 72 is connected to the flange 51. The weight of the motor assembly 10 can be transferred from the housing 13 to the bearing housing 72 and from the bearing housing 72 to the flange 51.

[0256] The connecting end 42 of the connecting structure 40 passes through the hollow region of the rotor 11.

[0257] In the initial contracted position, the end of the sleeve 50, the nut 35, and the guide sleeve 60 away from the pressing structure 22 extends into the housing 13 of the motor assembly 10 and into the hollow area of ​​the rotor 11. That is to say, in any plane parallel to the axial direction, the guide sleeve 60, the nut 35, and the sleeve 50 all coincide with the rotor 11.

[0258] As can be seen from the above embodiments, the cardiopulmonary resuscitation device of this application, through the reasonable arrangement of the lead screw 30, rotor 11, first bearing 71, guide sleeve 60, sleeve 50, and other structures, allows the motor assembly 10 to be located at one end of the lead screw 30 along its axial direction. This helps to reduce the size of the cardiopulmonary resuscitation device in all directions perpendicular to the axial direction (i.e., the radial direction of the lead screw 30), and improves the structural compactness of the cardiopulmonary resuscitation device. Furthermore, it also helps to reduce the axial size of the cardiopulmonary resuscitation device at the initial contraction position. In other words, the cardiopulmonary resuscitation device can have a smaller size in all directions perpendicular to the axial direction of the lead screw 30, and also a smaller size in the axial direction, which is beneficial for achieving overall miniaturization of the cardiopulmonary resuscitation device. Furthermore, the frameless motor design allows the rotor to directly drive the lead screw 30 through a connecting structure, which improves the kinetic energy utilization and transmission efficiency of the motor. Since intermediate transmission components such as pulleys are not required, heat generation is less severe, and heat dissipation is better. The frameless motor can be positioned at one end of the lead screw 30's axial direction, resulting in higher space utilization in the radial direction. In some embodiments, since the nut 35 and the lead screw 30 can be installed inside the frameless motor, the nut 35 can pass through the first bearing 71 and enter the motor assembly 10, further increasing the pressing height utilization of the push rod assembly 20.

[0259] In the description of this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.

[0260] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A cardiopulmonary resuscitation device, characterized by, include: An electric motor assembly includes a stator and a rotor, the rotor having an annular structure defining a hollow region, and the stator being disposed on the outer periphery of the rotor; A lead screw, which is coaxially arranged with the rotor; A connecting structure that connects the rotor and the lead screw; A nut, which is sleeved on the outer periphery of the lead screw and engages with the lead screw; A push rod assembly for performing chest compressions on a target, the push rod assembly including a push rod body and a compression structure, the compression structure being disposed at the end of the push rod body away from the motor assembly, and the other end of the push rod body near the motor assembly being connected to a lead screw nut, the push rod body being sleeved on the outer periphery of the lead screw; wherein, the rotor drives the lead screw to rotate through the connecting structure, the lead screw being used to drive the lead screw nut to move linearly along the axial direction during rotation, thereby driving the push rod assembly to move linearly along the axial direction through the lead screw nut; A first bearing is used to simultaneously support the rotation of the rotor and the linear movement of the push rod assembly. The first bearing surrounds the outer periphery of the connecting structure and is located axially on the side of the rotor facing the pressing structure. A guide sleeve is used to guide the push rod assembly to move linearly along the axial direction, and the guide sleeve is sleeved on the outer periphery of the push rod body; The push rod assembly has an initial retracted position in which the orthographic projection of the nut and the stator on any plane parallel to the axial direction at least partially coincides, and the orthographic projection of the first bearing and the guide sleeve on any plane parallel to the axial direction at least partially coincides.

2. A cardiopulmonary resuscitation device, characterized by include: An electric motor assembly includes a stator and a rotor, the rotor having an annular structure defining a hollow region, and the stator being disposed on the outer periphery of the rotor; A lead screw, which is coaxially arranged with the rotor; A nut, which is sleeved on the outer periphery of the lead screw and engages with the lead screw; A push rod assembly for performing chest compressions on a target, the push rod assembly including a push rod body and a compression structure, the compression structure being disposed at the end of the push rod body away from the motor assembly, the other end of the push rod body being close to the motor assembly being connected to the lead screw nut, and the push rod body being sleeved on the outer periphery of the lead screw; A connecting structure connects the rotor and the lead screw. The connecting structure includes a connecting end and a connecting cylinder. The connecting cylinder is hollow and has an opening at one end facing the pressing structure. The connecting end is located at the end of the connecting cylinder away from the opening. The connecting end passes through or is housed in the hollow region of the rotor. The end of the lead screw near the rotor passes through or is housed in the connecting end. The rotor drives the lead screw to rotate via the connecting structure. The lead screw drives the lead screw nut to move linearly along the axial direction during rotation, thereby driving the push rod assembly to move linearly along the axial direction via the lead screw nut. A guide sleeve is used to guide the push rod body to move linearly along the axial direction, and the guide sleeve is sleeved on the outer periphery of the push rod body; The push rod assembly has an initial retracted position, in which the nut and the guide sleeve are inserted into the connecting cylinder through the opening of the connecting structure.

3. The cardiopulmonary resuscitation apparatus of claim 2, wherein, The cardiopulmonary resuscitation device further includes a first bearing for simultaneously supporting the rotation of the rotor and the linear movement of the push rod assembly. The first bearing surrounds the outer periphery of the connecting cylinder and is axially located on the side of the rotor facing the pressing structure.

4. A cardiopulmonary resuscitation device, characterized by include: Motor assembly, including stator and rotor; A lead screw, which is coaxially arranged with the rotor; A connecting structure that connects the rotor and the lead screw; A nut, which is sleeved on the outer periphery of the lead screw and engages with the lead screw; A push rod assembly for performing chest compressions on a target, the push rod assembly including a push rod body and a compression structure, the compression structure being disposed at the end of the push rod body away from the motor assembly, and the other end of the push rod body near the motor assembly being connected to a lead screw nut, the push rod body being sleeved on the outer periphery of the lead screw; wherein, the rotor drives the lead screw to rotate through the connecting structure, the lead screw being used to drive the lead screw nut to move linearly along the axial direction during rotation, thereby driving the push rod assembly to move linearly along the axial direction through the lead screw nut; A first bearing is used to simultaneously support the rotation of the rotor and the linear movement of the push rod assembly. The first bearing surrounds the outer periphery of the connecting structure and is located axially on the side of the rotor facing the pressing structure. The first bearing has a first shaft end face on the side facing the pressing structure. A guide sleeve is used to guide the push rod body to move linearly along the axial direction, and the guide sleeve is sleeved on the outer periphery of the push rod body; The push rod assembly has an initial retracted position in which at least a portion of the nut extends beyond the first shaft end face in an axial direction away from the pressing structure, and the first bearing and the guide sleeve at least partially coincide in orthographic projection on any plane parallel to the axial direction.

5. The cardiopulmonary resuscitation apparatus of claim 4, wherein, The rotor has a ring-shaped structure and defines a hollow region, and the stator is disposed on the outer periphery of the rotor.

6. The cardiopulmonary resuscitation apparatus according to any one of claims 1 to 5, characterized in that, In the initial contraction position, the nut and the rotor at least partially coincide in orthogonal projection on any plane parallel to the axial direction, or the nut is located axially on the side of the rotor facing the pressing structure.

7. The cardiopulmonary resuscitation apparatus according to any one of claims 1, 2, 3, 5, wherein The end of the lead screw near the motor assembly passes axially through or is housed in the hollow region of the rotor.

8. The cardiopulmonary resuscitation apparatus of claim 1 or 5, wherein, A portion of the connecting structure passes through or is housed within the hollow region of the rotor.

9. The cardiopulmonary resuscitation apparatus of claim 8, wherein, The connecting structure includes a connecting end and a connecting cylinder. The connecting cylinder has an opening at one end facing the pressing structure. The connecting end is located at the end of the cylinder away from the opening. The connecting end passes through or is accommodated in the hollow region of the rotor. The end of the lead screw near the rotor passes through or is accommodated in the connecting end. At the initial contraction position, the nut and the guide sleeve are inserted into the connecting cylinder through the opening of the connecting structure.

10. The cardiopulmonary resuscitation apparatus of any one of claims 1, 3, 4, 5, wherein, The motor assembly also includes a housing, within which the stator and the rotor are disposed; The first bearing is disposed outside the housing and is axially located on the side of the housing facing the pressing structure; or, The first bearing is at least partially disposed inside the housing and is radially disposed between the connecting structure and the housing.

11. The cardiopulmonary resuscitation apparatus of claim 1 or 3, wherein The first bearing has a first shaft end face on the side facing the pressing structure, and in the initial contracted position, at least a portion of the nut extends beyond the first shaft end face in an axial direction away from the pressing structure.

12. The cardiopulmonary resuscitation apparatus of any one of claims 1, 3, 4, 5, wherein, At the initial contraction position, the orthographic projections of the nut, the first bearing, and the guide sleeve on any plane parallel to the axial direction at least partially coincide; or, The first bearing has a second shaft end face on the side away from the pressing structure, and in the initial contracted position, the entire nut extends beyond the second shaft end face in an axial direction away from the pressing structure.

13. The cardiopulmonary resuscitation apparatus of any one of claims 2-5, wherein, The motor assembly also includes a housing, within which the stator and the rotor are disposed; The nut is disposed on the outside of the housing and is located axially on the side of the housing facing the pressing structure; or, the nut is at least partially disposed inside the housing.

14. The cardiopulmonary resuscitation apparatus of any one of claims 1, 3, 4, 5, wherein, The cardiopulmonary resuscitation device further includes a sleeve, which is fitted around the outer periphery of the guide sleeve and fixed relative to the stator, and the push rod body is at least partially located inside the sleeve; the first bearing and the sleeve at least partially coincide in orthographic projection on any plane parallel to the axial direction.

15. The cardiopulmonary resuscitation apparatus of claim 2 or 9, wherein, The cardiopulmonary resuscitation device further includes a sleeve, which is fitted around the outer periphery of the guide sleeve and fixed relative to the stator, with at least a portion of the push rod body located inside the sleeve; the sleeve is inserted into the connecting cylinder portion through the opening of the connecting structure.

16. The cardiopulmonary resuscitation apparatus of any one of claims 1-5, wherein, The cardiopulmonary resuscitation device further includes a sleeve, which is fitted around the outer periphery of the guide sleeve and fixed relative to the stator, with the push rod body at least partially located inside the sleeve.

17. The cardiopulmonary resuscitation apparatus of claim 16, wherein, At the initial contraction position, the guide sleeve is at least partially located within the sleeve; The push rod assembly also has an extreme extension position, in which the guide sleeve extends out of the sleeve.

18. The cardiopulmonary resuscitation device according to claim 17, characterized in that, Anti-rotation structures are respectively provided between the push rod body and the guide sleeve, and between the guide sleeve and the sleeve, and the guide sleeve can move linearly along the axial direction relative to the sleeve.

19. The cardiopulmonary resuscitation apparatus of any one of claims 1-5, wherein, The guide sleeve is movably connected to the push rod assembly so that the guide sleeve can move linearly along the axial direction relative to the push rod assembly.

20. The cardiopulmonary resuscitation apparatus of claim 19, wherein, The guide sleeve is provided with a first stop structure and a second stop structure, wherein the first stop structure is located on the side of the second stop structure that is axially closer to the pressing structure; The cardiopulmonary resuscitation device further includes a connector disposed on the outer periphery of the push rod assembly. The connector extends into the gap region between the first stop structure and the second stop structure, and the connector is capable of linear axial movement within the gap region.

21. The cardiopulmonary resuscitation apparatus of claim 20, wherein, The guide sleeve has a guide groove on its side wall, the guide groove extends axially, the connector extends into the guide groove, and can move linearly axially within the guide groove; The guide groove wall on the side closer to the pressing structure forms at least a part of the first stop structure, and the guide groove wall on the side away from the pressing structure forms at least a part of the second stop structure.

22. The cardiopulmonary resuscitation apparatus of claim 20, wherein, In the initial contracted position, the second stop structure abuts against the connector on the side axially away from the pressing structure, so that the connector bears at least a portion of the weight of the guide sleeve.

23. The cardiopulmonary resuscitation apparatus of claim 16, wherein, The outer circumferential surface of the guide sleeve is provided with a first limiting structure, and the cardiopulmonary resuscitation device further includes a second limiting structure that cooperates with the first limiting structure. The first limiting structure and the second limiting structure are used to limit the distance of linear movement of the guide sleeve in the sleeve along the axial direction towards the side of the pressing structure.

24. The cardiopulmonary resuscitation apparatus of claim 23, wherein, The first limiting structure is a stepped surface formed on the outer peripheral surface of the guide sleeve, the stepped surface being located on the side of the guide sleeve close to the pressing structure, and the second limiting structure is a protruding structure that protrudes radially inward from the inner peripheral surface of the sleeve.

25. The cardiopulmonary resuscitation device according to claim 23, characterized in that, The first limiting structure is a stepped surface formed on the outer peripheral surface of the guide sleeve, and the stepped surface is located on the side of the guide sleeve close to the pressing structure; the cardiopulmonary resuscitation device also includes an end cap, which is disposed at one end of the sleeve close to the pressing structure, and the push rod body passes through the end cap; the second limiting structure is a protruding structure that protrudes radially inward from the inner peripheral surface of the end cap.

26. The cardiopulmonary resuscitation apparatus of claim 17, wherein, The motor assembly also includes a housing, and the sleeve and the housing are an integral structure.

27. The cardiopulmonary resuscitation apparatus of claim 17, wherein, The motor assembly is located axially at the end of the sleeve away from the pressing structure. The motor assembly also includes a housing. The sleeve is integrally disposed outside the housing and is located axially on the side of the housing facing the pressing structure.

28. The cardiopulmonary resuscitation apparatus of claim 17, wherein, The motor assembly also includes a housing, and a portion of the sleeve is disposed inside the housing; The sleeve and the rotor at least partially overlap in orthographic projection on any plane parallel to the axial direction; Alternatively, the sleeve may be axially positioned on the side of the rotor facing the pressing structure.

29. The cardiopulmonary resuscitation device according to any one of claims 1, 3, 4, and 5, characterized in that, The cardiopulmonary resuscitation device further includes a sleeve, which is fitted around the outer periphery of the guide sleeve and fixed relative to the stator, with the push rod body at least partially located inside the sleeve. The sleeve is provided with a flange on the outer periphery of one end near the motor assembly, and the flange extends radially outward; The motor assembly includes a housing, and the flange is disposed on the outside of the housing and is located axially on the side of the housing facing the pressing structure; The outer shell is directly or indirectly connected to the flange.

30. The cardiopulmonary resuscitation apparatus of claim 29, wherein, The first bearing is disposed outside the housing and is located axially on the side of the housing facing the pressing structure. The first bearing is axially disposed between the housing and the flange.

31. The cardiopulmonary resuscitation apparatus of claim 30, wherein, The cardiopulmonary resuscitation device includes a connecting post connected to the housing, the connecting post extending axially from the housing toward the pressing structure, and the connecting post connecting the housing and the flange.

32. The cardiopulmonary resuscitation apparatus of claim 30, wherein, The cardiopulmonary resuscitation device further includes a bearing housing, the first bearing is disposed in the bearing housing, and the cardiopulmonary resuscitation device includes a connecting post connected to the housing, the connecting post extending axially from the housing toward the pressing structure, and the connecting post connecting the housing and the bearing housing.

33. The cardiopulmonary resuscitation apparatus of claim 30, wherein, The first bearing includes a bearing housing, the first bearing is disposed in the bearing housing, and the bearing housing is directly connected to the flange and the housing.

34. The cardiopulmonary resuscitation apparatus of claim 29, wherein, The outer shell is directly connected to the flange, and the first bearing is disposed inside the outer shell and radially disposed between the outer shell and the connecting structure.

35. The cardiopulmonary resuscitation apparatus of any one of claims 1-5, wherein, The rotor and the connecting structure are either an integral structure or separate structures.

36. The cardiopulmonary resuscitation apparatus of any one of claims 1-5, wherein, The cardiopulmonary resuscitation device further includes a detection structure for detecting the rotation angle of at least one of the rotor, the connecting structure, and the lead screw.

37. The cardiopulmonary resuscitation apparatus of claim 36, wherein, The detection structure is at least partially located radially inside the stator, and the detection structure is sleeved on the outer periphery of the connecting structure; or, the detection structure is located axially on the side of the stator away from the pressing structure.

38. The cardiopulmonary resuscitation apparatus of any one of claims 1, 3, 4, 5, wherein, The cardiopulmonary resuscitation device further includes a second bearing, which is disposed on the outer periphery of the connecting structure or on the outer periphery of the end of the lead screw near the motor assembly, and the second bearing is located axially on the side of the rotor away from the first bearing, and the first bearing and the second bearing are coaxially arranged.

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