WO2023123928A1

WO2023123928A1 - Reciprocating telescopic mechanism, and external chest compression device having same

Info

Publication number: WO2023123928A1
Application number: PCT/CN2022/100608
Authority: WO
Inventors: 孔伟方; 章军辉; 李宁
Original assignee: 苏州尚领医疗科技有限公司
Priority date: 2021-12-28
Filing date: 2022-06-23
Publication date: 2023-07-06
Also published as: CN114129427A

Abstract

A reciprocating telescopic mechanism, comprising a rotation assembly (10), a compression assembly (20), a driver (30), and a working assembly (40). The working assembly (40) is mounted at a lower end of the compression assembly (20), and is configured to compress the chest of a patient. A drive input position of the rotation assembly (10) is connected to the driver (30), a sliding area of the rotation assembly (10) is coupled to the compression assembly (20), and the rotation assembly (10) is configured to convert rotational motion of the driver (30) into linear motion of the compression assembly (20). The drive input position is located between the sliding area and the working assembly (40). In the reciprocating telescopic mechanism, the position of the driver (30) is lowered, such that the center of gravity of the overall mechanism moves downwards, and the swaying of the mechanism can be reduced during compression.

Description

Reciprocating telescopic mechanism and chest compression device with same

This application claims the priority of the Chinese patent application submitted to the State Intellectual Property Office on December 28, 2021, the application number is 202111623557.7, and the invention title is "reciprocating telescopic mechanism and chest compression device with it", the entire content of which has been passed References are incorporated in this application.

technical field

The invention relates to the field of medical technology, in particular to a reciprocating telescopic mechanism and a chest compression device having the same.

Background technique

In the process of cardiopulmonary resuscitation, chest compression is an important link, which directly affects whether the patient recovers spontaneous circulation and ultimately survives. Today's chest compressions are mainly divided into two compression theories: heart pump theory mechanism and chest pump theory mechanism. The main principle of the heart pump theory is to apply compressions directly on the sternum on the outside of the heart to achieve the effect of compressing the heart at a single point, causing the heart to pump blood. The main principle of the thoracic pump theory is to squeeze the patient's entire thorax to achieve heart pumping through the internal compression of the thorax. The mechanism of 3D chest compression is a combination of heart pump theory and thoracic pump theory, which includes both single-point compression and chest compression.

Chest compressions are divided into two types: manual compressions and mechanical compressions. For mechanical chest compressions, in the prior art, the cardiopulmonary resuscitation instrument is a structure that performs compressions (ie, the host of the cardiopulmonary resuscitation instrument), and the compression head is controlled by a motor to reciprocate Telescopic movement, in which the output shaft of the motor is facing upward, and the position of the motor is also placed upward, so that the center of gravity of the chest compression device is concentrated on the upper part of the entire assembly, and it is easy to shake when pressing, and even cause the interruption of the compression. It directly affects the compression effect and reduces the recovery success rate.

Contents of the invention

The object of the present invention is to provide a reciprocating telescopic mechanism and a chest compression device with it, so as to solve the above technical problems.

To achieve the above object, the present invention provides the following technical solutions:

In the first aspect, a reciprocating telescopic mechanism includes a rotating assembly, a pressing assembly, a driver and a working assembly.

The working assembly is installed at the lower end of the pressing assembly, and is used for pressing the patient's chest.

The driving input position of the rotating assembly is connected to the driver, the sliding area of the rotating assembly is coupled to the pressing assembly, and the rotating assembly is used to convert the rotating motion of the driver into the linear motion of the pressing assembly.

The drive input location is between the sliding region and the working assembly.

Further, the drive input position is located at the lower part of the rotating assembly or near the lower end.

Further, the sliding area is the range between the upper part of the rotating assembly or a position close to the upper end and the driving input position.

Further, an accommodating chamber is provided inside the pressing assembly, and at least a part of the rotating assembly is located in the accommodating chamber.

The pressing assembly is also provided with an avoidance channel, and the avoidance channel communicates with the accommodating cavity and the outside world.

The reciprocating telescopic structure further includes a transmission assembly, the transmission assembly connects the rotation assembly and the driver through the avoidance channel; the driver drives the rotation assembly to rotate through the transmission assembly.

Further, the rotating assembly includes a rotating rod; the pressing assembly includes a sliding block and a pressing piece, the inner center of the pressing piece is an accommodating cavity, the upper end of the pressing piece is fixedly connected with the sliding block, and the rotating At least one part of the rod is located in the accommodating cavity, and the sliding block is coupled with the rotating rod located outside the accommodating cavity.

Further, the transmission assembly includes a first synchronous wheel, a second synchronous wheel and a synchronous belt, the first synchronous wheel is fixedly installed on the output shaft of the driver, and the second synchronous wheel is fixedly installed on the rotating At the drive input position of the rod, the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt.

Further, the pressing member is surrounded by a plurality of pressing pieces, the inner central positions of the plurality of pressing pieces are the accommodating cavity, and the gaps between adjacent pressing pieces form the avoidance channel.

Further, the lower end of the driver is higher than the lower end of the rotating assembly.

Further, the reciprocating telescopic mechanism further includes a fixed plate, and the rotating rod is rotatably mounted on the fixed plate.

Further, the rotating rod is mounted on the fixing plate through a connecting piece, the connecting piece passes through the avoidance channel, the fixing plate is fixedly connected to the connecting piece, and the rotating rod is rotatably installed on the the connectors described above.

Further, the connecting member installs the rotating rod through a bearing, and the bearing is located in the accommodation cavity.

Further, the reciprocating telescopic mechanism further includes an anti-rotation assembly, which prevents the pressing assembly from being offset and does not rotate along its central axis during the reciprocating telescopic movement.

Further, the anti-rotation assembly includes a guide plate and a follower, the guide plate has a guide groove in the same direction as the working assembly, the follower is arranged on the upper end of the pressing assembly, and the follower The device is embedded in the guide groove and slides up and down inside it.

Further, an upper retaining ring and a lower retaining ring are provided on the rotating rod.

The upper retaining ring is arranged on the upper end of the rotating rod.

The lower retaining ring is arranged at the lower part of the rotating rod or near the lower end for fixing the bearing.

Further, the fixing plate is provided with a sleeve located on the periphery of the pressing member.

Further, the reciprocating telescopic mechanism also includes an induction assembly, the induction assembly includes a vertical plate, a photoelectric sensor and a pointer, the vertical plate is fixedly installed on the fixed plate and arranged parallel to the pressing piece, the vertical plate The photoelectric sensor is installed on the upper end, and the pointer is fixedly arranged on the sliding block.

Further, a plurality of hooks are symmetrically arranged on the fixing plate.

Further, the rotating rod is a screw rod, and the sliding block is a screw nut used in cooperation with the rotating rod.

Further, the output shaft of the driver is arranged downward.

In a second aspect, a chest compression device includes any one of the reciprocating telescopic mechanisms described above.

The beneficial effects of the present invention are:

The present application adopts the cooperation method of the screw rod and the screw nut, and the pressing piece is fixedly arranged on the screw nut and located at the periphery of the screw rod, so that the structure is compact and the overall size is reduced;

In this application, the driving input position of the driver and the screw rod is set at the lower part of the screw rod or near the lower end, and the position of the driver is lowered without reducing the stroke of the working component, so that the center of gravity of the whole mechanism moves down, and the mechanism is in the Reduce shaking or no shaking when the working components are extruded;

The lower end of the driver in the present application is higher than the lower end of the rotating assembly. When the reciprocating telescopic mechanism is in any state, it is ensured that the driver does not interfere with the working components, the structure is stable, and the center of gravity of the reciprocating telescopic mechanism can be shifted downward;

In the present application, by adjusting the installation position of the upper retaining ring, the stroke range of the sliding block can be positioned and adjusted to ensure the effective working stroke of the working assembly, that is, to ensure the effective extrusion of the patient.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the present invention;

Fig. 2 is a structural schematic diagram of the connection between the driver and the rotating assembly of the present invention;

Fig. 3 is a structural schematic diagram of a rotating assembly of the present invention;

Fig. 4 is a structural schematic diagram of the pressing assembly of the present invention;

Fig. 5 is a side view of the present invention;

Fig. 6 is the sectional view of Fig. 5;

Fig. 7 is a structural schematic diagram of the anti-rotation component and the sensing component of the present invention;

Fig. 8 is a schematic structural view of the fixing plate and pressing assembly of the present invention;

Fig. 9 is a structural schematic diagram of the fixing plate and the mounting plate of the present invention.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the first aspect, please refer to FIG. 1, a reciprocating telescopic mechanism, including a rotating assembly 10, a pressing assembly 20, a driver 30 and a working assembly 40,

The working assembly 40 is a compression head, and the working assembly 40 is installed at the lower end of the pressing assembly 20 for squeezing the patient's chest.

The driving input position of the rotating assembly 10 is connected to the driver 30, the sliding area of the rotating assembly 10 is coupled to the pressing assembly 20, and the rotating assembly 10 is used to convert the rotating motion of the driver 30 into the pressing Linear motion of assembly 20.

The drive input location is located between the sliding area and the working assembly 40 .

In a specific embodiment, the driver 30 of the present application drives the rotating assembly 10 to perform a rotating movement, and the rotating assembly 10 drives the pressing assembly 20 coupled in its sliding area to perform lifting movement, and the lifting stroke of the pressing assembly 20 is According to the length of the sliding area of the rotating assembly 10, the pressing assembly 20 drives the working assembly 40 at its lower end to also move up and down, thereby squeezing the patient's chest.

Further, the drive input position is located at the lower part of the rotating assembly 10 or near the lower end.

Further, the sliding area is a range between the upper part of the rotating assembly 10 or a position close to the upper end and the driving input position.

During specific implementation, the driving input position of the present application is located between the sliding area and the working assembly 40, so that the installation position of the driver is moved from the top of the rotating assembly 10 in the prior art to the bottom of the rotating assembly 10 or close to it. The position of the lower end moves the overall center of gravity of the reciprocating telescopic mechanism downwards, and the reciprocating telescopic mechanism reduces shaking during pressing work to ensure effective extrusion of the patient.

In actual implementation, compared with the prior art, the sliding area and the driving input position of the present application are adjusted, the driving input position is located at the lower part of the rotating assembly 10 or near the lower end, and the sliding area of the pressing assembly 20 is at the On the upper part of the rotating assembly 10, the center of gravity of the reciprocating telescopic mechanism of the present application is shifted downward, so that the overall reciprocating telescopic mechanism operates stably and greatly reduces the volume of the entire reciprocating telescopic mechanism.

Further, please refer to FIG. 2 and FIG. 4 , an accommodating chamber 26 is provided inside the pressing assembly 20 , and at least a part of the rotating assembly 10 is located in the accommodating chamber 26 .

In practice, when the pressing assembly reciprocates, the setting of the accommodation cavity 26 prevents the rotation assembly from interfering with the pressing assembly, that is, the accommodation cavity 26 gives the rotation assembly a space to move.

The pressing assembly 20 is also provided with an avoidance channel 23 , and the avoidance channel 23 communicates with the accommodating chamber 26 and the outside world.

The reciprocating telescopic structure also includes a transmission assembly 31, the transmission assembly 31 connects the rotation assembly 10 and the driver 30 through the escape channel 23, and the driver 30 drives the rotation assembly 10 through the transmission assembly 31 to perform Rotational movement.

In practice, when the pressing component moves back and forth, the setting of the avoidance channel prevents the transmission component from interfering with the pressing component, that is, the avoiding channel gives the transmission component a space for movement.

It should be noted that the connection position between the transmission assembly 31 and the rotation assembly 10 is the drive input location on the rotation assembly 10 .

During specific implementation, the driver 30 of the present application may be a motor.

Further, please refer to FIGS. 3-6 , the rotating assembly 10 includes a rotating rod 11 . The pressing assembly 20 includes a sliding block 21 and a pressing member 22 , and the inner center of the pressing member 22 is provided with an accommodating cavity 26 . The upper end of the pressing member 22 is fixedly connected with the sliding block 21 , at least a part of the rotating rod 11 is located in the receiving chamber 26 , and the sliding block 21 is coupled with the rotating rod 11 located outside the receiving chamber 26 .

In practice, since at least a part of the rotating rod 11 is located in the accommodation cavity 26, the volume of the reciprocating telescopic mechanism of the present application is greatly reduced, and the structure is more compact.

Still further, the rotating rod 11 is a screw rod, and the sliding block 21 is a screw nut used in conjunction with the rotating rod 11 .

In a specific implementation, the screw converts the rotational motion of the driver 30 into the linear motion of the screw nut, and the pressing member 22 fixed on the screw nut drives the working assembly 40 to move downward in a straight line.

Further, please refer to FIG. 4 , the pressing member 22 is surrounded by a plurality of pressing pieces 221, and the inner central position of the plurality of pressing pieces 221 is the accommodating cavity 26, and one of the adjacent pressing pieces The gap between them forms the avoidance channel 23 for the timing belt 313 to pass through.

In specific implementation, the pressing piece 22 of the present application is composed of a plurality of pressing pieces, the pressing pieces are arc-shaped plates, and the plurality of pressing pieces are combined into a cylindrical shape, and the interior of the multiple pressing pieces forms an accommodating cavity 26, Its accommodating chamber 26 is used for installing at least a part of the rotating rod 11 . The pressing pieces of the present application are arc-shaped plates but not limited to arc-shaped plates, as long as a plurality of pressing pieces are formed and the structure forming the accommodating cavity 26 inside is within the scope of protection of the present application.

Further, please refer to FIG. 2, FIG. 5, and FIG. On the output shaft of the driver 30 , the second synchronous wheel 312 is fixedly installed at the driving input position of the rotary rod 11 , and the first synchronous wheel 311 and the second synchronous wheel 312 are connected by a synchronous belt 313 .

During specific implementation, the synchronous belt 313 passes through the avoidance channel 23 to connect the first synchronous wheel 311 and the second synchronous wheel 312 to ensure that the first synchronous wheel 311 and the second synchronous wheel 311 are synchronized. The rotation of the wheels 312 is synchronized.

Further, please refer to FIG. 2 , the lower end of the driver 30 is higher than the lower end of the rotating assembly 10 .

During specific implementation, it is worth noting that, in the embodiment of the present application, the drive input position is located near the lower end of the screw rod, and the driver 30 is installed in an upside-down manner, with the output shaft of the driver 30 placed downward.

Preferably, the driver 30 can also have multiple installation methods. The purpose of the installation of the driver 30 is that the lower end of the driver 30 is not lower than the lower end of the rotary assembly 10, and the installation method can be placed horizontally or placed upwards. Way.

When the driver 30 is placed horizontally, the drive input position is not limited by the height direction of the driver 30; when the driver 30 is placed upward, the drive input position is located at the bottom of the screw rod or near the middle ; The driver 30 can choose one of the upright, upside-down and horizontal placement methods.

More specifically, the driver further includes a controller, and the controller is arranged outside the driver 30 and is electrically connected to the driver 30 .

More specifically, a reducer is installed at the output end of the driver 30 , and the first synchronous wheel 311 is installed at the output end of the reducer.

More specifically, the driver also includes an encoder connected to the controller.

More specifically, the driver also includes a power supply, and the power supply can be a battery module that provides power to the driver 30, and the power supply can also be a wire that provides power to the driver 30, and the two power supply methods can also be Exist at the same time, choose according to the environment and requirements of use.

Further, please refer to FIG. 3 , the reciprocating telescopic mechanism further includes a fixing plate 50 , and the fixing plate 50 installs the rotating rod 11 through a bearing 51 .

For specific implementation, please refer to FIG. 8 , the reciprocating telescopic mechanism further includes a fixed plate 50 , and the rotating rod 11 is rotatably mounted on the fixed plate 50 .

Further, the rotating rod 11 is installed on the fixing plate 50 through a connecting piece 52, the connecting piece 52 passes through the avoidance channel 23, the fixing plate 50 is fixedly connected with the connecting piece 52, the rotating The rod 11 is rotatably mounted on the connecting member 52 .

Still further, the connecting member 52 installs the rotating rod 11 through a bearing 51 , and the bearing 51 is located in the accommodating cavity 26 .

In the actual implementation of the present application, the way of fixed connection between the connecting piece and the fixing plate includes integral connection, and the two can also be fixed to each other; the connecting piece can also be formed by a part protruding from the fixing plate.

Preferably, the bearing is arranged in the accommodation chamber 26 , the structure is compact, and the center of gravity moves downward, and the avoidance channel prevents the pressing member from interfering with the fixing plate or the connecting member when the pressing member moves back and forth.

During the actual implementation of the present application, the fixing plate 50 is installed at or near the lower end of the rotating rod 11 to lower the center of gravity of the overall reciprocating telescopic mechanism.

During specific implementation, please refer to FIG. 9 , the lower end of the bearing 51 is fixedly mounted with a flange 53, and the outer edge of the flange 53 is evenly distributed with a plurality of outwardly extending mounting seats 531, and the mounting seats 531 and The connecting piece 52 is fixed by bolts, screws and the like.

More specifically, the driver 30 is fixedly installed on the fixing plate 50 .

Further, please refer to FIG. 6 , the first synchronous wheel 311 , the second synchronous wheel 312 and the synchronous belt 313 are disposed under the fixing plate 50 .

Further, please refer to FIG. 1 , FIG. 2 and FIG. 7 , the reciprocating telescopic mechanism further includes an anti-rotation assembly 60 , which is used to prevent the pressing assembly 20 from shifting during the reciprocating telescopic movement and Does not rotate about its central axis.

Still further, the anti-rotation assembly 60 includes a guide plate 61 and a follower 62, the guide plate 61 has a guide groove 63 in the same direction as the working assembly 40, and the follower 62 is arranged on the slide The upper end of the block 21, the follower 62 is embedded in the guide groove 63 and slides up and down inside it.

Still further, the guide plate 61 is vertically and fixedly installed on the fixed plate 50 , the follower 62 includes a follower installation seat 621 fixedly installed on the sliding block 21 , and the follower installation seat 621 passes a roller 622 . The roller 622 is embedded in the guide groove 63.

In specific implementation, the guide groove 63 is set in the vertical direction, and the roller 622 is embedded in the guide groove 63 and displaced in the vertical direction, and the roller 622 is fixedly installed on the sliding block 21 to ensure sliding The displacement of the block 21 in the vertical direction will not cause offset phenomenon, nor will the sliding block 21 rotate around the rotating rod 11 .

Further, please refer to FIG. 3 and FIG. 6 , the upper retaining ring 12 and the lower retaining ring 13 are provided on the rotating rod 11 .

The upper retaining ring 12 is arranged on the upper end of the rotating rod 11; the upper retaining ring 12 is composed of two upper half rings, and the two upper half rings are fixed by a snap spring.

In specific implementation, the upper retaining ring 12 has the function of limiting and stopping, which is used to limit the rising position of the sliding block 21 and prevent the sliding block 21 from slipping out of the upper end of the rotating rod 11; more specifically, by adjusting the The position of the upper retaining ring 12 is used to adjust the range of the sliding area to ensure the effective working stroke of the working assembly 40 .

The lower retaining ring 13 is disposed on the lower part of the rotating rod 11 or close to the lower end for fixing the bearing 51 .

In a specific implementation, the lower retaining ring 13 is arranged below the bearing, and the lower retaining ring 13 is composed of two lower half rings, and the two lower half rings are fixed by a snap spring.

Further, please refer to FIG. 1 , the fixing plate 50 is provided with a sleeve 70 located on the periphery of the pressing member 22 .

In a specific implementation, the sleeve 70 is composed of a plurality of tube plates, and the shape of the tube plates is the same as that of the pressing member 22 . The sleeve is used for supporting, and has the function of isolating oil dirt and sundries.

Further, please refer to Fig. 2 and Fig. 7, the reciprocating telescopic mechanism also includes an induction assembly 80, the induction assembly 80 includes a riser 81, a photoelectric sensor 82 and a pointer 83, and the riser 81 is fixedly installed on the fixed plate 50 and parallel to the pressing member 22 , the photoelectric sensor 82 is installed on the upper end of the riser 81 , and the pointer 83 is fixedly arranged on the sliding block 21 .

In specific implementation, the photoelectric sensor is used in conjunction with the pointer, the photoelectric sensor determines the position of the working component through the position of the pointer, and transmits the information to the controller, and the controller returns the working component to its original position by controlling the motor, or the controller Control the length of the forward and reverse rotation of the motor to make the working components start to work in the sliding area.

The sleeve 70 is provided with a sliding hole, and the pointer 83 slides in the sliding hole.

Further, referring to FIG. 1 and FIG. 8 , a plurality of hooks 90 are symmetrically arranged on the fixing plate 50 .

During specific implementation, the hook is used to fix the strap.

Further, the central axes of the rotating rod 11 , the pressing member 22 and the sleeve 70 are the same.

When the present application is implemented, please refer to Fig. 8 and Fig. 9, the upper and lower ends of the plurality of pressing members 22 are fixed by the upper plate 24 and the lower plate 25, and the upper end surface of the upper plate 24 is fixedly equipped with a sliding block 21. A working component 40 is fixedly installed on the lower end surface of the lower plate 25 .

The output shaft of the driver 30 of the present application drives the first synchronous wheel 311 to rotate, and the synchronous belt 313 keeps the second synchronous wheel 312 and the first synchronous wheel 311 to rotate synchronously, and the second synchronous wheel 312 makes the The rotary rod 11 performs a rotary motion, and the rotary rod 11 converts the rotary motion of the driver 30 into the linear motion required by the sliding block 21, and the linear motion of the sliding block 21 drives the fixed The pressing part 22 and the working assembly 40 make a linear motion.

In a second aspect, the embodiment of the present application further provides a chest compression device, including any one of the reciprocating telescopic mechanisms described above.

The present application adopts the cooperation mode of the screw rod and the screw nut, and the pressing piece is fixedly arranged on the screw nut and located at the periphery of the screw rod, so that the structure is compact and the overall size is reduced.

In this application, the driving input position of the driver and the screw rod is set at the lower part of the screw rod or near the lower end, and the position of the driver is lowered without reducing the stroke of the working component, so that the center of gravity of the whole mechanism moves down, and the mechanism is in the Reduce shaking when pressing.

The lower end of the driver in this application is higher than the lower end of the rotating assembly. When the reciprocating telescopic mechanism is in any state, it is guaranteed that the driver does not interfere with the working components, the structure is stable, and the center of gravity of the reciprocating telescopic mechanism can be shifted downward.

In the present application, by adjusting the installation position of the upper retaining ring, the stroke range of the sliding block can be positioned and adjusted to ensure the effective working stroke of the working components, that is, to ensure the effective extrusion of the patient.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims

A reciprocating telescopic mechanism, characterized in that it comprises a rotating assembly (10), a pressing assembly (20), a driver (30) and a working assembly (40),

The working assembly is installed at the lower end of the pressing assembly (20) for pressing the patient's chest;

The driving input position of the rotating assembly (10) is connected to the driver (30), the sliding area of the rotating assembly (10) is coupled to the pressing assembly (20), and the rotating assembly (10) is used for The rotary motion of the driver (30) is converted into the linear motion of the pressing assembly (20);

The drive input location is located between the sliding region and the working assembly (40).
The reciprocating telescopic mechanism according to claim 1, characterized in that, the drive input position is located at the lower part of the rotating assembly (10) or near the lower end.
The reciprocating telescopic mechanism according to claim 1, characterized in that, the sliding area is a range between the upper part of the rotating assembly (10) or a position close to the upper end and a driving input position.
The reciprocating telescopic mechanism according to claim 1, characterized in that, an accommodating chamber (26) is provided inside the pressing assembly (20), and at least a part of the rotating assembly (10) is located in the accommodating chamber (26) Inside;

The pressing assembly (20) is also provided with an avoidance channel (23), and the avoidance channel (23) communicates the accommodation cavity (26) with the outside world;

The reciprocating telescopic structure also includes a transmission assembly (31), and the transmission assembly (31) passes through the avoidance channel (23) to connect the rotation assembly (10) and the driver (30); the driver (30 ) drives the rotating assembly (10) to perform rotational movement through the transmission assembly (31).
The reciprocating telescopic mechanism according to claim 4, characterized in that, the rotating assembly (10) includes a rotating rod (11); the pressing assembly (20) includes a sliding block (21) and a pressing piece (22), the The inner center of the pressing piece (22) is a housing chamber (26), the upper end of the pressing piece (22) is fixedly connected with the sliding block (21), and at least a part of the rotating rod (11) is located in the housing chamber (26), and the sliding block (21) is coupled with the rotating rod (11) outside the accommodating cavity (26).
The reciprocating telescopic mechanism according to claim 5, characterized in that, the transmission assembly (31) comprises a first synchronous wheel (311), a second synchronous wheel (312) and a synchronous belt (313), and the first synchronous The wheel (311) is fixedly installed on the output shaft of the driver (30), the second synchronous wheel (312) is fixedly installed at the drive input position of the rotary rod (11), and the first synchronous wheel ( 311) and the second synchronous wheel (312) are connected through a synchronous belt (313).
The reciprocating telescopic mechanism according to claim 5, characterized in that, the pressing member (22) is surrounded by a plurality of pressing pieces (221), and the inner central positions of the plurality of pressing pieces (221) are the accommodating cavity (26), and the gap between adjacent pressing pieces (221) forms the avoidance channel (23).
The reciprocating telescopic mechanism according to claim 1, characterized in that, the lower end of the driver (30) is higher than the lower end of the rotating assembly (10).
The reciprocating telescopic mechanism according to claim 5, characterized in that: the reciprocating telescopic mechanism further comprises a fixed plate (50), and the rotating rod (11) is rotatably mounted on the fixed plate (50).
The reciprocating telescopic mechanism according to claim 9, characterized in that: the rotating rod (11) is installed on the fixed plate (50) through a connecting piece (52), and the connecting piece (52) passes through the avoiding The channel (23), the fixed plate (50) is fixedly connected with the connecting piece (52), and the rotating rod (11) is rotatably installed on the connecting piece (52).
The reciprocating telescopic mechanism according to claim 10, characterized in that: the connecting piece (52) installs the rotating rod (11) through a bearing (51), and the bearing (51) is located in the accommodating cavity (26) middle.
The reciprocating telescopic mechanism according to claim 5, characterized in that, the reciprocating telescopic mechanism further comprises an anti-rotation assembly (60), and the anti-rotation assembly (60) enables the pressing assembly (20) to Not offset and not rotated about its central axis.
The reciprocating telescopic mechanism according to claim 12, characterized in that, the anti-rotation assembly (60) includes a guide plate (61) and a follower (62), and the guide plate (61) has a ), the guide groove (63) with the same direction of movement, the follower (62) is arranged on the upper end of the pressing assembly (20), the follower (62) is embedded in the guide groove (63) and Swipe up and down inside it.
The reciprocating telescopic mechanism according to claim 11, characterized in that an upper retaining ring (12) and a lower retaining ring (13) are provided on the rotating rod (11);

The upper retaining ring (12) is arranged on the upper end of the rotating rod (11);

The lower retaining ring (13) is arranged at the lower part of the rotating rod (11) or near the lower end for fixing the bearing (51).
The reciprocating telescopic mechanism according to claim 9, characterized in that, the fixing plate (50) is provided with a sleeve (70) located on the periphery of the pressing member (22).
The reciprocating telescopic mechanism according to claim 9, characterized in that, the reciprocating telescopic mechanism further comprises an induction assembly (80), and the induction assembly (80) includes a riser (81), a photoelectric sensor (82) and a pointer (83), the vertical plate (81) is fixedly installed on the fixed plate (50) and arranged in parallel with the pressing member (22), and the photoelectric sensor (82) is installed on the upper end of the vertical plate (81) ), the pointer (83) is fixedly arranged on the slider (21).
The reciprocating telescopic mechanism according to claim 9, characterized in that a plurality of hooks (90) are arranged symmetrically on the fixing plate (50).
The reciprocating telescopic mechanism according to claim 5, characterized in that, the rotating rod (11) is a screw rod, and the sliding block (21) is a screw nut used in conjunction with the rotating rod (11).
The reciprocating telescopic mechanism according to claim 8, characterized in that the output shaft of the driver (30) is arranged downward.
A chest compression device, characterized by comprising the reciprocating telescopic mechanism described in any one of claims 1-19.