A flat swing-arm chest compression machine

Abstract

The present invention discloses a flat swing-arm chest compression machine, comprising a main unit, which is flat as a whole; a curved turntable, which is arranged at the inner bottom of the main unit, and one side of the curved turntable is evenly provided with a plurality of curved protrusions extending along the axial direction of the curved turntable toward the top of the main unit; a power drive assembly, which is arranged between the upper side of the curved turntable and the top of the main unit and at least partially located in the space between the curved protrusions; a swing member, which is symmetrically arranged on both sides of the curved turntable, and the swing member is rotationally connected to the main unit at a rotation point, the part of the swing member close to the curved turntable extends to a position corresponding to the edge curved surface on the curved protrusion, and the end of the swing member away from the curved turntable is used to be connected to a strap, and when the curved turntable rotates, the swing member cooperates with the edge curved surface of the curved protrusion to cause the swing member to swing. The present invention solves the problems of complex internal structure and low space utilization of existing swing-arm chest compression machines.

Description

Technical Field

[0001] The present invention relates to the technical field of chest compression machines, in particular to a flat swing-arm chest compression machine. Background Art

[0002] At present, in actual clinical operations, the manual compression depth of medical staff in CPR (cardiopulmonary resuscitation) is often insufficient, and cannot be pressed to the depth specified by the AHA guidelines, which will lead to poor cardiopulmonary resuscitation results. In addition, it consumes a lot of physical energy for medical staff, and they cannot perform compressions for a long time. Therefore, many hospitals are now equipped with chest compression devices to replace manual compressions by medical staff. Existing chest compression devices generally have a compression head that only presses the chest downward, can only achieve single-point compression, and cannot deform the entire chest contour. Therefore, swing-arm chest compression devices and strap-type telescopic chest compression devices have also appeared. A device is proposed to solve the technical problems of the existing single-point compression chest compression device, such as the patent with publication number CN307633514S. The swing-arm chest compression device uses a driving component inside the chest compression machine main unit to drive the swing arms on both sides to move synchronously, thereby tightening the straps. The tightening of the straps also realizes the downward pressure of the main unit. The chest is squeezed by the tightening of the straps and the downward pressure of the main unit as a whole. However, its internal structure is relatively complex. It can be seen from the patent that the height of the main unit is relatively high, and its space utilization rate is obviously not high. Summary of the Invention

[0003] The present invention provides a flat swing-arm chest compression machine with a simple structure, which solves the problems of complex internal structure and low space utilization of existing swing-arm chest compression machines.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flat swing-arm chest compression machine, comprising a main unit, which is flat as a whole; a curved turntable, which is arranged at the inner bottom of the main unit, and one side of the curved turntable is evenly provided with a plurality of curved protrusions extending along the axial direction of the curved turntable toward the top of the main unit; a power drive assembly, which is arranged between the upper side of the curved turntable and the top of the main unit and is at least partially located in the space between the curved protrusions to drive the curved turntable to rotate; a swinging member, which is symmetrically arranged on both sides of the curved turntable, and the swinging member rotates around the main unit. The rotating point on the curved turntable rotates, the part of the swinging member close to the curved turntable extends to a position corresponding to the edge curved surface on the curved raised portion, and the end of the swinging member away from the center of the curved turntable is used to be connected to the strap. When the curved turntable rotates, the swinging member cooperates with the edge curved surface of the curved raised portion to move relative to each other, so that the swinging member swings, thereby tightening and loosening the strap. The space on the upper side of the curved turntable is used to set the power drive component, which can effectively reduce the height of the main unit, and the curved turntable can be supported by the bottom surface of the main unit, which is more stable when rotating.

[0005] Preferably, the power drive assembly includes a motor and a reducer arranged between the motor and the curved turntable, and the reducer is arranged in the space between the curved raised portions.

[0006] Preferably, the motor is arranged close to the top of the main unit, which can reduce the overall height of the main unit; and the motor is connected to the main unit through a fixed flange on its lower side, and the reducer is connected to the lower side of the fixed flange. The reducer and the motor can be firmly connected through the fixed flange, and the motor and the main unit can be stably connected at the same time, which can reduce the vibration generated when the motor is running.

[0007] Preferably, the swinging member includes a swinging arm located outside the main unit, and a follower is installed on the swinging arm, which extends to the inside of the main unit and contacts the edge surface of the curved protrusion. The two ends of the swinging arm are connected to the main unit through a rotating member located at the rotation point, and the swinging of the swinging arm can be controlled by the edge surface of the curved protrusion through the follower.

[0008] Preferably, the shape of the swing arm matches the main unit and is arranged close to the outer wall of the main unit, which can reduce the external space of the main unit occupied by the swing arm when it swings and improve the safety of the swing arm when it swings. The swing arm is semicircular and the outer wall of the main unit is an arc surface that matches the swing arm.

[0009] Preferably, a connecting seat extending outward is provided in the middle of the swing arm, and a strap connector for connecting a strap is provided on the connecting seat. The strap is connected by the outward extending structure, which facilitates the quick installation of the strap.

[0010] Preferably, a movable joint is installed on the connecting seat, and the strap connector is connected to the movable joint, so that the strap can automatically move within a certain range after being connected to the strap connector, so that the strap can adapt to different human body shapes when fixed, and the strap is close to the human body and the host is also close to the human body.

[0011] Preferably, a rotating connecting seat is protrudingly provided on the outer side wall of the main unit at positions corresponding to the two ends of the swing arm, and a rotating part is installed inside the rotating connecting seat. The ends of the swing arms on both sides of the main unit extend into the rotating connecting seat and are connected to the rotating part. The rotating connecting seat can protect the rotating part and also improve the strength of the main unit, and effectively protect the end rotating structure of the swing arm.

[0012] Preferably, a plane bearing is provided between the bottom of the curved turntable and the bottom plate of the main machine, which can effectively support the rotation of the curved turntable and reduce the resistance encountered by the curved turntable during rotation.

[0013] Preferably, the edge curved surface of the curved raised portion includes a first curved portion and a second curved portion symmetrically arranged on both sides of the curved raised portion, and a first transition portion connecting the first curved portion and the second curved portion is provided on the top of the curved raised portion, and a second transition portion is formed between adjacent curved raised portions.

[0014] Preferably, the curvatures of the first curved surface portion and the second curved surface portion are different, so that the speed of tightening the strap is slower than the speed of loosening the strap, which makes the pressing more efficient and reasonable.

[0015] Preferably, a covering component is provided on the outside of the main unit to cover the main unit and the swinging part. The strap has an opening to connect the strap to the main unit to form an openable closed loop structure. The main unit and the swinging part are covered by the covering component to form an integral backpack, which not only protects the swinging of the swinging part when the chest compression machine is in use, but also allows the entire chest compression machine to be carried diagonally or on one shoulder on the back or chest using the strap, making it convenient to carry the chest compression machine outside, which has positive significance for out-of-hospital emergency treatment.

[0016] Preferably, the covering component includes an outer layer located on the upper side of the main unit and an inner layer located on the lower side of the main unit, and the outer layer is connected to the edge of the inner layer.

[0017] Preferably, the opening is closed by a Velcro, which allows the strap to be quickly closed, making it easier to carry the chest compression machine.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The structure is simple, the transmission structure is simple, and there are few parts, which can reduce the probability of failure. The space on the upper side of the curved turntable is used to set the power drive component, which can effectively reduce the height of the main unit. The curved turntable can be supported by the bottom surface of the main unit. In addition, this solution has few parts and high assembly efficiency. After the main unit, motor, fixed flange, reducer, plane bearing, and curved turntable are all installed in place, the swing arm can be inserted and the fixed pin shaft can be locked, making the installation of the swing arm convenient. Compared with similar products, the structural complexity is greatly reduced and the reliability is improved. Moreover, the outer side of the flat main unit can be provided with a covering component to form a backpack-like manner that can be carried on the body, which is convenient for carrying outside, and has positive significance for outpatient emergency treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the host of the present invention;

[0022] Figure 3 This is a three-dimensional structural diagram of the host of the present invention with the upper cover removed;

[0023] Figure 4 This is a first-view stereoscopic structural diagram of the curved turntable of the present invention;

[0024] Figure 5 This is a second-view perspective structural diagram of the curved turntable of the present invention;

[0025] Figure 6 This is a schematic diagram of the present invention in use;

[0026] Figure 7 This is a side structural diagram of the present invention in use;

[0027] Figure 8 is a perspective schematic diagram of a chest compression machine with a covering component according to the present invention;

[0028] Figure 9 is a schematic diagram of the interior of a chest compression machine with a covering component according to the present invention;

[0029] Figure 10 This is a schematic diagram of the chest compression machine with a covering component in a carrying state according to the present invention.

[0030] Reference numerals:

[0031] 1. Main unit, 11. Quick-connect buckle, 12. Reducer, 13. Plane bearing, 14. Rotating part, 15. Movable joint part, 16. Curved raised part, 17. Outer layer, 18. Opening part, 19. Inner layer, 2. Swinging part, 20. Covering part, 21. Swing arm, 22. Velcro, 3. Strap connector, 4. Strap, 5. Rotating connecting seat, 6. Motor, 7. Fixed flange, 8. Connecting seat, 9. Follower, 91. Cylindrical part, 92. Connecting shaft, 10. Curved turntable, T1. First curved surface part, T2. Third curved surface part, T3. First transition part, T4. Second transition part. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] like Figure 1-10As shown, the present invention is provided to solve the problems of the existing swing-arm chest compression machine with complex internal structure, low space utilization and unstable operation of the main unit. The present invention provides the following technical solutions: A flat swing-arm chest compression machine, comprising a main unit 1, which is flat as a whole; a curved turntable 10, arranged at the inner bottom of the main unit 1, and one side of the curved turntable 10 is evenly provided with a plurality of curved protrusions 16 extending axially along the curved turntable 10 toward the top of the main unit 1; a power drive component, arranged between the upper side of the curved turntable 10 and the top of the main unit 1 and at least partially located in the space between the curved protrusions 16, so as to drive the curved turntable 10 to rotate; a swinging member 2, symmetrically arranged on both sides of the curved turntable 10, the swinging member 2 rotates around the rotation point on the main unit 1, the part of the swinging member 2 close to the curved turntable 10 extends to a position corresponding to the edge curved surface on the curved protrusion 16, and the end of the swinging member 2 away from the center of the curved turntable 10 is used to rotate with The main frame 1 is connected to the main frame 4. When the curved turntable 10 rotates, the swinging member 2 cooperates with the edge curve of the curved protrusion 16 to move relative to each other, so that the swinging member 2 swings, thereby tightening and loosening the strap 4. The space on the upper side of the curved turntable 10 is used to set the power drive component, which can effectively reduce the height of the main frame 1, and the curved turntable 10 can be supported by the bottom surface of the main frame 1, which is more stable when rotating. Specifically, when the curved turntable 10 rotates, the edge curve of the curved protrusion 16 can be used to make the swinging members 2 on both sides swing as the contact point with the edge curve moves up and down. The number of curved protrusions 16 can be two or four, which can be adjusted according to the pressing frequency. The curved turntable 10 as a whole includes a bottom plate and a curved protrusion 16 arranged along the edge of the bottom plate. Therefore, the space between the curved protrusions 16 is vacant, so this space can be used to install the power drive component, so that the curved turntable 10 occupies very little internal space of the main frame 1. The strap 4 is a wide strap with a relatively large force-bearing area, which can firmly fix the patient. The strap 4 can be of various types and connection methods. It can be an external accessory or sold in conjunction with the host 1.

[0034] The main unit 1 may be composed of an upper cover and a bottom cover connected up and down, and both of the upper cover and the bottom cover may be disassembled to facilitate installation of internal components, which is very convenient.

[0035] The power drive assembly may include a motor 6 and a reducer 12 disposed between the motor 6 and the curved turntable 10. The reducer 12 is disposed in the space between the curved raised portions 16. The reducer 12 can utilize the internal space of the curved turntable 10 for installation, resulting in a more compact structure. The motor 6 may be a high-torque flat brushless DC motor, which is relatively small, low in height, and has a low center of gravity. The reducer 12 can convert the high speed of the motor into the required low speed, resulting in a more stable transmission. The motor 6 may be disposed close to the top of the host 1, thereby reducing the overall height of the host 1.

[0036] In this embodiment, if Figure 5 As shown, a plane bearing 13 is provided between the bottom of the curved turntable 10 and the bottom plate of the host 1 , which can effectively support the rotation of the curved turntable 10 and reduce the resistance encountered by the curved turntable 10 during rotation.

[0037] In order to improve the installation stability of the motor 6 and the reducer 12, as Figure 2-3 As shown, the motor 6 is connected to the main machine 1 through the fixing flange 7 on its lower side, and the reducer 12 is connected to the lower side of the fixing flange 7. The reducer 12 and the motor 6 can be firmly connected through the fixing flange 7, and the motor 6 and the main machine 1 can be stably connected, which can reduce the vibration generated when the motor 6 is running. The fixing flange 7 can be disc-shaped, and a groove matching the shape of the motor 6 is provided on its upper end, which can position the motor 6 and clamp the motor 6 between the fixing flange 7 and the top of the main machine 1, which is firm and reliable. At the same time, a through hole is opened in the middle, and the main shaft of the motor 6 can pass through the through hole to be connected to the reducer 12. The reducer 12 and the fixing flange 7 are connected by fasteners, so that the motor 6, the fixing flange 7 and the reducer 12 are connected into a whole.

[0038] In order to reduce the height and weight, the host 1 may not be equipped with a battery, and an external power supply may be used to power the entire host 1, such as a civilian 220V power supply or an external mobile power supply.

[0039] In this embodiment, if Figure 4As shown, the edge curved surface of the curved protrusion 16 includes a first curved surface portion T1 and a second curved surface portion T2 symmetrically arranged on both sides of the curved protrusion 16. The top of the curved protrusion 16 is provided with a first transition portion T3 connecting the first curved surface portion T1 and the second curved surface portion T2. ​​A second transition portion T4 is formed between adjacent curved protrusions 16. The first curved surface portion T1 and the second curved surface portion T2 can guide the up and down swinging of the swing member 2, so that it can withstand greater force when swinging. The curved turntable 10 rotates clockwise. When the swing member 2 moves up along the second curved surface portion T2, it is the process of the swing member 2 lifting up. When the swing member 2 lifts up, the strap 4 tightens. At the same time, the host 1 also has a tendency to press down, and together with the strap 4, it compresses the chest cavity. This is the positive swing of the swing member 2. When the swing member 2 moves along the first curved surface portion T1, the strap 4 is loosened, that is, the swing member 2 is in the descending stage. This is the reverse swing of the swing member 2.

[0040] When the bandage 4 is loosened, under the action of the chest restoring force, the first curved surface T1 of the curved protrusion 16 also plays a role, limiting the rebound speed, causing the swinging member to swing in the opposite direction. The first transition portion T3 and the second transition portion T4 allow the swinging member 2 to stay in these two positions for a certain period of time. In particular, at the first transition portion T3, which corresponds to the deepest chest compression, the short stay facilitates the full outflow of blood from the heart. The second transition portion T4 corresponds to the most relaxed chest position, which facilitates the return of blood to the heart. Furthermore, the different curvatures of the first curved surface T1 and the second curved surface T2 allow the bandage 4 to be quickly relaxed and slightly slower when tightened. This avoids excessive compression and damage to the body when compressing the chest cavity. At the same time, the bandage is relaxed relatively quickly, which facilitates the return of blood, resulting in a more efficient and reasonable compression.

[0041] like Figure 1-3As shown, in this embodiment, the swing member 2 includes a swing arm 21 located on the outside of the main unit 1, and a follower 9 is installed on the swing arm 21, which extends to the inside of the main unit 1 and contacts the edge curved surface of the curved protrusion 16. The two ends of the swing arm 21 are connected to the main unit 1 through a rotating member 14 located at the rotation point. The swing of the swing arm 21 can be controlled by the edge curved surface of the curved protrusion 16 through the follower 9. Among them, as a first specific embodiment of the follower 9, the follower 9 can include a cylindrical member 91 and a connecting shaft 92 connected to one end of the cylindrical member 91, and the connecting shaft 92 is connected to the connecting hole on the swing arm 21. The cylindrical member 91 is conducive to the matching contact between the follower 9 and the curved protrusion 16. The connecting shaft 92 allows the follower 9 to be removed from the swing arm 21. The surface of the cylindrical member 91 is smooth, and it can be fixedly connected to the connecting shaft 92 or rotatably connected. The connecting shaft 92 can also be an integrated structure with the cylindrical member, and the connecting shaft 92 can be fixedly connected to the swing arm 21 or rotatably connected. As a second specific embodiment of the follower 9, the follower 9 includes a roller and a support screw arranged at one axial end of the roller. The support screw is connected to the threaded hole on the swing arm 21. The contact between the roller and the curved protrusion 16 can reduce the friction between the follower 9 and the curved protrusion 16, reduce noise, and make the operation of the press smoother. The roller can be a rubber roller or a metal roller, and the support screw serves as the central rotating shaft of the roller.

[0042] As an arrangement of the swing arm 21, Figure 1 As shown, the shape of the swing arm 21 matches the main unit 1 and is arranged close to the outer wall of the main unit 1. This can reduce the external space of the main unit 1 occupied by the swing arm 21 when it swings, and improve the safety of the swing arm 21 when it swings. Specifically, the swing arm 21 can be semicircular, and the outer wall of the main unit 1 is an arc surface that matches the swing arm 21.

[0043] In order to facilitate the connection between the swing arm 21 and the strap 4, an outwardly extending connecting seat 8 is provided in the middle of the swing arm 21, and a strap connector 3 for connecting the strap 4 is provided on the connecting seat 8. The strap 4 is connected through the outward extending structure, which facilitates the quick installation of the strap 4.

[0044] Since the ends of the existing straps 4 are mostly connected to the main unit 1 by a crossbar, the crossbar and the main unit 1 cannot be swung to adjust the angle. However, since the shape of the human chest is not a standard cylinder, the straps cannot match the body shape of everyone when they are fixed. If they do not fit the human body when they are tied, the straps will not be tied tightly to the human body in some places, causing them to become loose during the pressing process. Therefore, in this embodiment, if Figure 3As shown, a movable joint part 15 is installed on the connecting seat 8, and the strap connector 3 is connected to the movable joint part 15, so that the strap 4 can automatically move within a certain range after being connected to the strap connector 3, so that the strap can adapt to different human body shapes when fixed, the strap is close to the human body and the host is also close to the human body. The movable joint part 15 here can be a joint bearing, which includes an outer ring and a ball head located in the center, and the ball head can be universally rotated relative to the outer ring.

[0045] The quick-connect buckle 11 at the end of the strap 4 is as shown Figure 1 As shown, the quick-connect buckle 11 encases the strap connector 6, preventing it from coming out and allowing it to rotate freely. Furthermore, the other end of the quick-connect buckle 11 is provided with a slot for threading the strap 4, facilitating the removal and installation of the strap 4 from the quick-connect buckle 11.

[0046] In order to protect the rotation of the swing arm 21, Figure 1 As shown, a rotating connecting seat 5 is protruded on the outer wall of the host 1 at positions corresponding to the two ends of the swing arm 21, and a rotating part 14 is installed inside the rotating connecting seat 5. The ends of the swing arms 21 on both sides of the host 1 extend into the rotating connecting seat 5 and are connected to the rotating part 14. The rotating connecting seat 5 can protect the rotating part 14 and also improve the strength of the host 1, and effectively protect the end rotating structure of the swing arm 21.

[0047] In order to make the use of chest compression machine more convenient and easier to install, Figure 8-10 As shown, the outer side of the host 1 is provided with a covering part 20 that covers the host 1 and the swinging part 2. The strap 4 has an opening part 18 to connect the strap 4 to the host 1 to form an openable closed loop structure. The host 1 and the swinging part 2 are covered by the covering part 20 to form an integral backpack, which can not only protect the swinging of the swinging part 2 when the chest compression machine is in use and prevent foreign objects from getting stuck and affecting the work, but also prevent the operator's fingers from getting stuck and getting injured during swinging for safety reasons. When in use, the strap 4 can also be used to carry the entire chest compression machine diagonally across or on one shoulder on the back or chest, which is convenient for carrying the chest compression machine outside, and has positive significance for out-of-hospital emergency treatment.

[0048] As an embodiment of the covering component 20, the covering component 20 can be made of elastic material, and at least part of the two ends of the strap 4 are located on the inner side of the covering component 20. The covering component 20 includes an outer layer 17 located on the upper side of the main unit 1 and an inner layer 19 located on the lower side of the main unit 1. The outer layer 17 is connected to the edge of the inner layer 19.

[0049] For ease of use, the opening 18 is closed by a Velcro 22, which can quickly close the strap 4 and facilitate carrying the chest compression machine.

[0050] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being described. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A flat swing arm chest compression machine, characterized in that: include: The main unit (1) is flat in shape; A curved turntable (10) is arranged at the inner bottom of the main machine (1), and a plurality of curved protrusions (16) are evenly arranged on one side of the curved turntable (10) and extend along the axial direction of the curved turntable (10) toward the top of the main machine (1); A power drive assembly is arranged between the upper side of the curved turntable (10) and the top of the main machine (1) and is at least partially located in the space between the curved raised portions (16) to drive the curved turntable (10) to rotate; The swinging member (2) is symmetrically arranged on both sides of the curved turntable (10), and the swinging member (2) rotates around the rotation point on the main unit (1). The portion of the swinging member (2) close to the curved turntable (10) extends to a position corresponding to the edge curved surface on the curved raised portion (16). The end of the swinging member (2) away from the center of the curved turntable (10) is used to be connected to the strap (4). When the curved turntable (10) rotates, the swinging member (2) and the edge curved surface of the curved raised portion (16) cooperate to move relative to each other, thereby causing the swinging member (2) to swing, thereby achieving tightening and loosening of the strap (4); The swing member (2) includes a swing arm (21) located outside the main unit (1), and a follower (9) is installed on the swing arm (21) and extends to the inside of the main unit (1) and contacts the edge curved surface of the curved surface protrusion (16). Both ends of the swing arm (21) are connected to the main unit (1) through a rotating member (14) located at a rotation point. The edge curved surface of the curved surface raised portion (16) includes a first curved surface portion (T1) and a second curved surface portion (T2) symmetrically arranged on both sides of the curved surface raised portion (16); a first transition portion (T3) connecting the first curved surface portion (T1) and the second curved surface portion (T2) is provided at the top of the curved surface raised portion (16); and a second transition portion (T4) is formed between adjacent curved surface raised portions (16).

2. The flat swing arm chest compression machine according to claim 1, characterized in that: The power drive assembly comprises a motor (6) and a reducer (12) arranged between the motor (6) and the curved turntable (10), wherein the reducer (12) is arranged in the space between the curved raised portions (16).

3. The flat swing arm chest compression machine according to claim 2, characterized in that: The motor (6) is arranged close to the top of the main machine (1), and the motor (6) is connected to the main machine (1) through the fixing flange (7) on the lower side thereof, and the reducer (12) is connected to the lower side of the fixing flange (7).

4. The flat swing arm chest compression machine according to claim 1, characterized in that: The swing arm (21) is semicircular, and the outer side wall of the main machine (1) is an arc surface matching the swing arm (21).

5. The flat swing arm chest compression machine according to claim 1, characterized in that: A connecting seat (8) extending outward is provided in the middle of the swing arm (21), and a strap connector (3) for connecting the strap (4) is provided on the connecting seat (8).

6. The flat swing arm chest compression machine according to claim 5, characterized in that: A movable joint component (15) is installed on the connecting seat (8), and the strap connecting component (3) is connected to the movable joint component (15).

7. The flat swing arm chest compression machine according to claim 1, characterized in that: A rotating connection seat (5) is protruded from the outer wall of the main unit (1) at positions corresponding to the two ends of the swing arm (21), a rotating member (14) is installed inside the rotating connection seat (5), and the ends of the swing arms (21) on both sides of the main unit (1) extend into the rotating connection seat (5) and are connected to the rotating member (14).

8. The flat swing arm chest compression machine according to claim 1, characterized in that: A plane bearing (13) is provided between the bottom of the curved turntable (10) and the bottom plate of the main machine (1).

9. The flat swing arm chest compression machine according to claim 1, characterized in that: The first curved surface portion (T1) and the second curved surface portion (T2) have different curvatures.

10. The flat swing arm chest compression machine according to claim 1, characterized in that: The outer side of the main unit (1) is provided with a covering component (20) covering the main unit (1) and the swinging member (2), and the strap (4) has an opening (18) to connect the strap (4) and the main unit (1) to form an openable closed loop structure.

11. The flat swing arm chest compression machine according to claim 10, characterized in that: The covering component (20) comprises an outer layer (17) located on the upper side of the main machine (1) and an inner layer (19) located on the lower side of the main machine (1), and the outer layer (17) is connected to the edge of the inner layer (19).

12. The flat swing arm chest compression machine according to claim 10, characterized in that: The opening (18) is closed by a Velcro (22).

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