Pediatric cardio-pulmonary resuscitation auxiliary pressing device

Abstract

The invention discloses a pediatric cardiopulmonary resuscitation auxiliary pressing device, and relates to the technical field of pediatric cardiopulmonary resuscitation. The device comprises a shell, a gear switching mechanism is arranged on the shell, the gear switching mechanism synchronously changes along with the number of pressing times, an image detector is installed on the inner wall of the shell and detects the number of changing times of the gear switching mechanism, and a data display screen is arranged on the outer wall of the shell. Through the arrangement of the gear switching mechanism, the image detector and the data display screen, in the emergency cardio-pulmonary resuscitation process of a patient, the gear switching mechanism and the image detector are used for recording the number of pressing times, and when the number of pressing times is reached, the data display screen is used for displaying the number of pressing times. And the data display screen analyzes and processes the frequency change and then gives an alarm, and an operator hears an alarm prompt and then breathes the patient, so that the cardio-pulmonary resuscitation effect of the patient is improved.

Description

Technical Field

[0001] This invention relates to the field of pediatric cardiopulmonary resuscitation technology, specifically to a pediatric cardiopulmonary resuscitation auxiliary compression device. Background Technology

[0002] Cardiopulmonary resuscitation (CPR) is the core method for rescuing children from cardiac arrest, and timely and standardized chest compressions and ventilation can significantly improve the survival rate of children. However, there are fundamental differences between the chest structure and spinal development of children (especially infants aged 0-10 years and preschool children) and adults; Existing cardiopulmonary resuscitation (CPR) for children typically requires a compression-to-ventilation ratio of 30:2 for single-person and 15:2 for two-person. However, existing devices generally lack compression counting, mode switching, and alarm prompts. In emergency situations, rescuers may cause delays in ventilation due to counting errors or rhythm confusion, or reduce the quality of resuscitation due to prolonged interruptions in compressions. To address the aforementioned problems, the inventors proposed a pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device. Summary of the Invention

[0003] In order to address the problem that existing devices generally lack compression counting, mode switching, and alarm prompt functions, the purpose of this invention is to provide a pediatric cardiopulmonary resuscitation auxiliary compression device.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a pediatric cardiopulmonary resuscitation auxiliary compression device, comprising a housing, wherein L-shaped support arms are fixedly connected to the outer walls on both sides of the housing, and a base plate is slidably connected to the bottom of the L-shaped support arms; A drive mechanism is installed on the top of the housing. A circular opening is provided on the outer wall of the top of the housing. A cam mechanism is provided inside the circular opening. The cam mechanism is inserted into the drive mechanism through the circular opening. A limit mechanism is provided on the outer wall of the housing. The limit mechanism limits and fixes the cam mechanism. The inner wall of the housing is provided with a sliding groove, and a pressing mechanism is slidably connected to the inner wall of the sliding groove. The cam mechanism drives the pressing mechanism to press down. A compression spring is provided on the inner wall of the sliding groove, and the compression spring is used to reset the pressing mechanism. The housing is provided with a gear switching mechanism, which is driven by a drive mechanism. The gear switching mechanism changes synchronously with the number of presses. An image detector is installed on the inner wall of the housing to detect the number of changes in the gear switching mechanism. A data display screen is provided on the outer wall of the housing to display the number of changes.

[0005] Preferably, the drive mechanism includes a drive motor, a rotating shaft, and a single tooth. The drive motor is mounted on the outer wall of the housing, the rotating shaft is connected to the output shaft of the drive motor, and the single tooth is fixedly connected to the outer wall of the rotating shaft.

[0006] Preferably, the cam mechanism includes a cam, a T-shaped connecting rod, and a closed disk. One side of the cam is inserted into the interior of the rotating shaft, the T-shaped connecting rod is connected to the other side of the cam, and the closed disk is rotatably connected to the outer wall of the T-shaped connecting rod.

[0007] Preferably, two protrusions are fixedly connected to the outer wall of the closed disk. The limiting mechanism includes a limiting shell, a return spring, and a limiting block. The limiting shell is fixedly connected to the outer wall of the shell, and the limiting block is slidably connected to the inner wall of the limiting shell. The return spring is disposed inside the limiting shell and is used to reset the limiting block. Limiting holes are formed on the outer wall of the protrusions.

[0008] Preferably, the pressing mechanism includes a transmission frame, with both sides of the transmission frame slidably connected to the inner wall of the slide groove of the housing, and the top of the transmission frame is configured as an arc-shaped structure. The transmission frame is engaged with the cam for transmission.

[0009] Preferably, an extension block is fixedly connected to the bottom outer wall of the transmission frame, and two second connecting arms are rotatably connected to the bottom of the transmission frame. A first connecting arm is slidably connected to one end of each second connecting arm. A tension spring is provided inside the second connecting arm. An arc-shaped plate is rotatably connected to the bottom end of the first connecting arm. The two arc-shaped plates are connected by a hinge. A telescopic plate is slidably connected to the inner wall of the arc-shaped plate to extend the pressure range of the arc-shaped plate.

[0010] Preferably, connecting blocks are rotatably connected to the outer walls of the two second connecting arms, and a bidirectional screw is threaded between the two connecting blocks.

[0011] Preferably, the end of the arc-shaped plate near the transmission frame is made of hard rubber, the bottom end of the arc-shaped plate is made of soft rubber, and a miniature pressure sensor is provided on the lower surface of the arc-shaped plate.

[0012] Preferably, the gear switching mechanism includes a cylinder, a pinion, a connecting frame, and a large gear. The cylinder is mounted on the outer wall of the housing, and the output end of the cylinder extends into the interior of the housing. The connecting frame is fixedly connected to the output end of the cylinder. The two ends of the connecting frame are rotatably connected to the pinion and the large gear, respectively. The pinion and the large gear are located on both sides of a single tooth and are staggered. The single tooth meshes with the pinion and the large gear successively.

[0013] Preferably, both the pinion and the gear have bar markings on the outer wall of the side closest to the image detector, and the two image detectors detect the bar markings on the pinion and the gear respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, through the setting of a gear switching mechanism, an image detector, and a data display screen, records the number of compressions during emergency cardiopulmonary resuscitation (CPR). When the required number of compressions is reached, the data display screen analyzes and processes the change in the number of compressions and then issues an alarm. Upon hearing the alarm, the operator then begins to breathe into the patient, thereby improving the effectiveness of CPR.

[0015] 2. The present invention, through the setting of the gear switching mechanism, allows the press-to-breathe mode to be recorded and then switched, making the operation more convenient and practical.

[0016] 3. The present invention uses an arc-shaped plate to fit the patient's chest cavity. By rotating the bidirectional screw, the arc-shaped plate can be adjusted to fit the width of the patient's chest cavity, thus improving its adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the base plate structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention.

[0021] Figure 4 This is a schematic diagram of the pressing mechanism of the present invention.

[0022] Figure 5 This is a schematic diagram of the compression spring structure of the present invention.

[0023] Figure 6 For the present invention Figure 5 A schematic diagram of the structure at point B.

[0024] Figure 7 This is a schematic diagram of the cam mechanism and gear switching mechanism of the present invention.

[0025] Figure 8 This is a schematic diagram of the cam mechanism and drive mechanism of the present invention.

[0026] In the diagram: 1. Housing; 2. Drive mechanism; 21. Drive motor; 22. Rotating shaft; 23. Single tooth; 3. Data display screen; 4. Limiting mechanism; 41. Limiting shell; 42. Return spring; 43. Limiting block; 5. Base plate; 6. Gear switching mechanism; 61. Cylinder; 62. Pinion; 63. Connecting frame; 64. Large gear; 7. Pressing mechanism; 71. Transmission frame; 72. Arc plate; 73. Telescopic plate; 74. Extension block; 75. First connecting arm; 76. Second connecting arm; 77. Tension spring; 78. Connecting block; 79. Bidirectional screw; 8. Cam mechanism; 81. Cam; 82. T-shaped connecting rod; 83. Enclosed disc; 9. Image detector; 10. Compression spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figure 1 - Figure 8 As shown, the present invention provides a pediatric cardiopulmonary resuscitation auxiliary compression device, including a housing 1, with L-shaped support arms fixedly connected to the outer walls on both sides of the housing 1, and a base plate 5 slidably connected to the bottom of the L-shaped support arms. A drive mechanism 2 is installed on the top of the housing 1. A circular opening is provided on the outer wall of the top of the housing 1. A cam mechanism 8 is provided inside the circular opening. The cam mechanism 8 is inserted into the drive mechanism 2 through the circular opening. A limit mechanism 4 is provided on the outer wall of the housing 1. The limit mechanism 4 limits and fixes the cam mechanism 8. A sliding groove is provided on the inner wall of the housing 1, and a pressing mechanism 7 is slidably connected on the inner wall of the sliding groove. A cam mechanism 8 drives the pressing mechanism 7 to press down. A compression spring 10 is provided on the inner wall of the sliding groove, and the compression spring 10 is used to reset the pressing mechanism 7. A gear switching mechanism 6 is provided on the housing 1, and a drive mechanism 2 drives the gear switching mechanism 6. The gear switching mechanism 6 changes synchronously with the number of presses. An image detector 9 is installed on the inner wall of the housing 1. The image detector 9 detects the number of changes of the gear switching mechanism 6. A data display screen 3 is provided on the outer wall of the housing 1. The data display screen 3 is used to display the number of changes.

[0029] The drive mechanism 2 includes a drive motor 21, a rotating shaft 22, and a single tooth 23. The drive motor 21 is mounted on the outer wall of the housing 1, the rotating shaft 22 is connected to the output shaft of the drive motor 21, and the single tooth 23 is fixedly connected to the outer wall of the rotating shaft 22. The purpose of this configuration is to drive the output shaft of the drive motor 21 to rotate, thereby driving the rotating shaft 22 and the single tooth 23 on the outer wall of the rotating shaft 22 to rotate, which is used to drive the gear switching mechanism 6 and the cam mechanism 8 and provide power.

[0030] The cam mechanism 8 includes a cam 81, a T-shaped connecting rod 82, and a closed disk 83. One side of the cam 81 is inserted into the interior of the rotating shaft 22, the T-shaped connecting rod 82 is connected to the other side of the cam 81, and the closed disk 83 is rotatably connected to the outer wall of the T-shaped connecting rod 82. The purpose of this design is that when the rotating shaft 22 rotates, it drives the cam 81 and the T-shaped connecting rod 82. The T-shaped connecting rod 82 rotates relative to the closed disc 83. The cam 81 is replaced by a plug-in connection, which facilitates the replacement of the cam 81. The cam 81 is available in different sizes with radii of 4cm, 5cm, 6cm, and 7cm. For the infant group, R=4cm (the cam 81 protrusion is more rounded), for the toddler group, R=5cm, for the preschool group, R=6cm, and for the school-age group, R=7cm (the cam 81 protrusion is flatter). This allows it to be adapted to children and infants of different ages for CPR.

[0031] Two protrusions are fixedly connected to the outer wall of the closed disk 83. The limiting mechanism 4 includes a limiting shell 41, a return spring 42, and a limiting block 43. The limiting shell 41 is fixedly connected to the outer wall of the housing 1. The limiting block 43 is slidably connected to the inner wall of the limiting shell 41. The return spring 42 is disposed inside the limiting shell 41 and is used to reset the limiting block 43. Limiting holes are provided on the outer wall of the protrusions. The purpose of this arrangement is that after the cam 81 is inserted into the rotating shaft 22, the tension of the return spring 42 supports the limiting block 43, allowing the limiting block 43 to engage with the limiting hole of the protrusion of the closed disk 83, thereby limiting and fixing the closed disk 83 and preventing the cam 81 and the T-shaped connecting rod 82 from disengaging from the rotating shaft 22 during rotation.

[0032] The pressing mechanism 7 includes a transmission frame 71, with both sides of the transmission frame 71 slidably connected to the inner wall of the slide groove of the housing 1. The top of the transmission frame 71 is set with an arc-shaped structure, and the transmission frame 71 is engaged with the cam 81 for transmission. The purpose of this arrangement is to enable the transmission frame 71 to engage with the cam 81 in a transmission process. During the rotation of the cam 81, the transmission frame 71 is pushed downward once for each rotation. During this period, the compression spring 10 maintains tension and reset function on the transmission frame 71, allowing the transmission frame 71 to intermittently reciprocate up and down movement.

[0033] An extension block 74 is fixedly connected to the bottom outer wall of the transmission frame 71. Two second connecting arms 76 are rotatably connected to the bottom of the transmission frame 71. A first connecting arm 75 is slidably connected to one end of the second connecting arm 76. A tension spring 77 is provided inside the second connecting arm 76. An arc plate 72 is rotatably connected to the bottom end of the first connecting arm 75. The two arc plates 72 are connected by a hinge. A telescopic plate 73 is slidably connected to the inner wall of the arc plate 72 to extend the pressure range of the arc plate 72. The purpose of this design is to extend the block 74, increase the pressure range of the bottom of the transmission frame 71, and make the pressure point rectangular, close to the range of pressure applied by both hands, to apply pressure to the middle of the patient's chest cavity. The two arc-shaped plates 72 are hinged to each other. The arc shape of the arc-shaped plates 72 is used to fit the patient's chest cavity. The first connecting arm 75 and the second connecting arm 76 extend, retract, and rotate between the transmission frame 71 and the arc-shaped plates 72 to adjust the angle between the two arc-shaped plates 72 to adapt to the chest cavity width of different patients. The tension spring 77 is used to provide a certain buffer at the beginning of the pressure application process of the arc-shaped plates 72.

[0034] Two connecting arms 76 are rotatably connected to the outer walls of the two second connecting arms 76, and a bidirectional screw 79 is threaded between the two connecting arms 78. The purpose of this configuration is to drive the two connecting blocks 78 by rotating the bidirectional screw 79, thereby changing the distance between the two connecting blocks 78 and the two second connecting arms 76, changing the included angle between the two second connecting arms 76 and the two arc plates 72, and simultaneously serving as a thread limiter.

[0035] The end of the arc plate 72 near the transmission frame 71 is made of hard rubber, the bottom end of the arc plate 72 is made of soft rubber, and a miniature pressure sensor is provided on the lower surface of the arc plate 72. The purpose of this design is that the end of the arc-shaped plate 72 closest to the transmission frame 71 is made of hard rubber, which is suitable for applying pressure to the middle of the patient's chest cavity. The bottom end of the arc-shaped plate 72 is made of soft rubber, which is used to conform to the patient's body and not to apply pressure. A miniature pressure sensor is provided on the lower surface of the arc-shaped plate 72. During the process of the arc-shaped plate 72 applying pressure to the patient's chest cavity, the miniature pressure sensor obtains the pressure data and transmits the data to the data display screen 3. The data display screen 3 analyzes the pressure data obtained by the miniature pressure sensor to help the operator determine whether the compression is effective.

[0036] The gear switching mechanism 6 includes a cylinder 61, a pinion 62, a connecting frame 63, and a large gear 64. The cylinder 61 is mounted on the outer wall of the housing 1, and the output end of the cylinder 61 extends into the interior of the housing 1. The connecting frame 63 is fixedly connected to the output end of the cylinder 61. The two ends of the connecting frame 63 are rotatably connected to the pinion 62 and the large gear 64, respectively. The pinion 62 and the large gear 64 are located on both sides of the single tooth 23, and the pinion 62 and the large gear 64 are staggered. The single tooth 23 meshes with the pinion 62 and the large gear 64 in sequence.

[0037] Both the small gear 62 and the large gear 64 have bar marks on the outer wall of the side closest to the image detector 9. The two image detectors 9 detect the bar marks of the small gear 62 and the large gear 64 respectively. The purpose of this arrangement is that the single tooth 23 is engaged with one of the pinion 62 and the large gear 64 for transmission. The pinion 62 has 15 teeth and the large gear 64 has 30 teeth. The rotating shaft 22 drives the single tooth 23 to rotate once, driving the pinion 62 or the large gear 64 by one tooth. The image detector 9 monitors the movement of the bar marks on the pinion 62 and the large gear 64. For every rotation of the shaft 22 and the single tooth 23, the cam 81 rotates once, and the transmission frame 71 and the arc plate 72 press down once. When the pinion 62 moves 15 teeth, the transmission frame 71 and the arc plate 72 press down 15 times. The data from the image detector 9 is transmitted to the data display screen 3. The data display screen 3 prompts the operator that 15 presses have been made and the patient has been given 2 breaths. The pinion 62 is equivalent to the two-person mode, and the large gear 64 is equivalent to the single-person mode. The method described above is only a best implementation method. In actual application, technicians can make actual adjustments.

[0038] Working principle: During use, the base plate 5 is placed under the patient, and then the device is slidably installed on top of the base plate 5, with the patient positioned between the base plate 5 and the device; The specifications of the cam 81 are selected according to the patient's age, height, and physique. The cam 81 is available in different specifications with radii of 4cm, 5cm, 6cm, and 7cm. For the infant group, R=4cm (the cam 81 protrusion is more rounded), for the toddler group, R=5cm, for the preschool group, R=6cm, and for the school-age group, R=7cm (the cam 81 protrusion is flatter). This allows it to be adapted to children and infants of different ages for CPR. To replace or install the cam 81, simply insert the cam 81 into the rotating shaft 22, and then use the tension of the return spring 42 to support the limiting block 43, allowing the limiting block 43 to engage with the limiting hole of the protrusion on the closed disc 83, thus limiting and fixing the closed disc 83. The installation is relatively quick and convenient. Then, simply rotate the bidirectional screw 79 to drive the two connecting blocks 78, thereby changing the distance between the two connecting blocks 78 and the two second connecting arms 76, and changing the included angle between the two second connecting arms 76 and the two arc plates 72 to adapt to the chest cavity width of different patients. The above two steps are simple and quick. The specifications of cam 81 are marked on the outer wall of cam 81. When using it, you only need to find and select it. The output shaft of the drive motor 21 rotates, driving the rotating shaft 22 and the single tooth 23 on the outer wall of the rotating shaft 22 to rotate. When the rotating shaft 22 rotates, the rotating shaft 22 drives the cam 81 and the T-shaped connecting rod 82. The T-shaped connecting rod 82 rotates relative to the closed disk 83, providing power. The transmission frame 71 is engaged with the cam 81. During the rotation of the cam 81, the transmission frame 71 is pushed downward once for each rotation. During this period, the compression spring 10 keeps the transmission frame 71 taut and reset, allowing the transmission frame 71 to move up and down intermittently. The extension block 74 increases the pressure range of the bottom of the transmission frame 71, making the pressure point rectangular, close to the range of two-handed pressure, applying pressure to the middle of the patient's chest cavity for cardiopulmonary resuscitation. The two arc plates 72 are hinged to each other. The arc shape of the arc plates 72 is used to fit the patient's chest cavity. The first connecting arm 75 and the second connecting arm 76 extend, retract, and rotate between the transmission frame 71 and the arc plates 72 to adjust the angle between the two arc plates 72 to adapt to different patients' chest cavity widths. The tension spring 77 is used to provide a certain buffer at the beginning of the pressure application process of the arc plates 72. The single tooth 23 meshes with one of the pinion 62 and the large gear 64. The pinion 62 has 15 teeth and the large gear 64 has 30 teeth. The rotating shaft 22 drives the single tooth 23 to rotate once, driving the pinion 62 or the large gear 64 by one tooth. The image detector 9 monitors the movement of the bar marks on the pinion 62 and the large gear 64. For each rotation of the shaft 22 and the single tooth 23, the cam 81 rotates once, and the transmission frame 71 and the arc plate 72 press down once. When the pinion 62 moves 15 teeth, the transmission frame 71 and the arc plate 72 press down 15 times. The data from the image detector 9 is transmitted to the data display screen 3. The data display screen 3 prompts the operator that 15 presses have been made and the patient has been given 2 breaths, thus facilitating the operator's use. The structure and configuration of this device can be appropriately adjusted by those skilled in the art after actual use, or before use, based on the scheme of this application, to make it suitable for actual use. Based on this device, a cardiopulmonary resuscitation recommendation is proposed: 1. Traditional cardiopulmonary resuscitation (chest compressions + breathing / ventilation) should be provided to infants and children who have suffered cardiac arrest.

[0039] 2. For infants and children who have suffered cardiac arrest, interruptions in cardiopulmonary resuscitation should be minimized. The pause time for chest compressions should be less than 10 seconds, and the chest should be allowed to fully recoil after each compression.

[0040] 3. If lay rescuers are unable or unwilling to perform artificial respiration on an infant or child who has suffered cardiac arrest, it is reasonable to provide chest compressions alone for cardiopulmonary resuscitation. The appropriate chest compression rate for infants and children is 100 to 120 times per minute.

[0041] 4. The depth of chest compressions should be at least 1 / 3 of the anteroposterior diameter of the chest, which is about 4 cm for infants and about 5 cm for children.

[0042] 5. For professional medical staff, heart rhythm should be checked every 2 minutes, and the duration should not exceed 10 seconds.

[0043] 6. It is appropriate to use 100% oxygen ventilation during CPR.

[0044] 7. When performing CPR without an advanced airway, the compression-to-ventilation ratio is: 30:2 for single rescuers and 15:2 for two / multiple rescuers.

[0045] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the drawings in the specification. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0046] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device, comprising a housing (1), characterized in that: L-shaped support arms are fixedly connected to the outer walls of both sides of the housing (1), and a base plate (5) is slidably connected to the bottom of the L-shaped support arms. A drive mechanism (2) is installed on the top of the housing (1). A circular opening is provided on the outer wall of the top of the housing (1). A cam mechanism (8) is provided on the inner side of the circular opening. The cam mechanism (8) is inserted into the drive mechanism (2) through the circular opening. A limiting mechanism (4) is provided on the outer wall of the housing (1). The limiting mechanism (4) limits and fixes the cam mechanism (8). A sliding groove is provided on the inner wall of the housing (1), and a pressing mechanism (7) is slidably connected on the inner wall of the sliding groove. The cam mechanism (8) drives the pressing mechanism (7) to press down. A compression spring (10) is provided on the inner wall of the sliding groove, and the compression spring (10) is used to reset the pressing mechanism (7). The housing (1) is provided with a gear switching mechanism (6), and the driving mechanism (2) drives the gear switching mechanism (6). The gear switching mechanism (6) changes synchronously with the number of presses. An image detector (9) is installed on the inner wall of the housing (1). The image detector (9) detects the number of changes of the gear switching mechanism (6). A data display screen (3) is provided on the outer wall of the housing (1). The data display screen (3) is used to display the number of changes.

2. The pediatric cardiopulmonary resuscitation auxiliary compression device as described in claim 1, characterized in that, The drive mechanism (2) includes a drive motor (21), a rotating shaft (22) and a single tooth (23). The drive motor (21) is mounted on the outer wall of the housing (1). The rotating shaft (22) is connected to the output shaft of the drive motor (21). The single tooth (23) is fixedly connected to the outer wall of the rotating shaft (22).

3. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 2, characterized in that, The cam mechanism (8) includes a cam (81), a T-shaped connecting rod (82) and a closed disk (83). One side of the cam (81) is inserted into the inside of the rotating shaft (22), the T-shaped connecting rod (82) is connected to the other side of the cam (81), and the closed disk (83) is rotatably connected to the outer wall of the T-shaped connecting rod (82).

4. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 3, characterized in that, Two protrusions are fixedly connected to the outer wall of the closed disk (83). The limiting mechanism (4) includes a limiting shell (41), a reset spring (42), and a limiting block (43). The limiting shell (41) is fixedly connected to the outer wall of the housing (1). The limiting block (43) is slidably connected to the inner wall of the limiting shell (41). The reset spring (42) is located inside the limiting shell (41) and is used to reset the limiting block (43). Limiting holes are opened on the outer wall of the protrusions.

5. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 4, characterized in that, The pressing mechanism (7) includes a transmission frame (71), the two sides of which are slidably connected to the inner wall of the groove of the housing (1), the top of the transmission frame (71) is set as an arc structure, and the transmission frame (71) is engaged with the cam (81) for transmission.

6. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 5, characterized in that, An extension block (74) is fixedly connected to the bottom outer wall of the transmission frame (71). Two second connecting arms (76) are rotatably connected to the bottom of the transmission frame (71). A first connecting arm (75) is slidably connected to one end of the second connecting arm (76). A tension spring (77) is provided inside the second connecting arm (76). An arc plate (72) is rotatably connected to the bottom end of the first connecting arm (75). The two arc plates (72) are connected by a hinge. A telescopic plate (73) is slidably connected to the inner wall of the arc plate (72) to extend the pressure range of the arc plate (72).

7. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 6, characterized in that, Connecting blocks (78) are rotatably connected to the outer walls of the two second connecting arms (76), and a bidirectional screw (79) is threaded between the two connecting blocks (78).

8. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 7, characterized in that, The end of the arc plate (72) near the transmission frame (71) is made of hard rubber, the bottom end of the arc plate (72) is made of soft rubber, and a miniature pressure sensor is provided on the lower surface of the arc plate (72).

9. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 8, characterized in that, The gear switching mechanism (6) includes a cylinder (61), a pinion (62), a connecting frame (63), and a large gear (64). The cylinder (61) is mounted on the outer wall of the housing (1). The output end of the cylinder (61) extends into the interior of the housing (1). The connecting frame (63) is fixedly connected to the output end of the cylinder (61). The two ends of the connecting frame (63) are rotatably connected to the pinion (62) and the large gear (64). The pinion (62) and the large gear (64) are located on both sides of a single tooth (23). The pinion (62) and the large gear (64) are staggered. The single tooth (23) meshes with the pinion (62) and the large gear (64) in turn.

10. A pediatric cardiopulmonary resuscitation (CPR) auxiliary compression device as described in claim 9, characterized in that, Both the small gear (62) and the large gear (64) have bar marks on the outer wall of the side closest to the image detector (9). The two image detectors (9) detect the bar marks of the small gear (62) and the large gear (64) respectively.

Images