A sinusoidal breathing waveform simulation device

Abstract

The utility model discloses a sinusoidal breathing waveform simulation device, including a cylinder, a slide, a cam mechanism and a driving mechanism, wherein the cylinder includes an air inlet and an air outlet for connecting a ventilator, the slide is connected to the piston rod of the cylinder; the cam mechanism is connected to the slide, and the cam mechanism drives the slide to move back and forth to drive the piston rod to move back and forth; the driving mechanism is connected to the cam mechanism in a transmission manner to drive the cam mechanism to rotate. The sinusoidal breathing waveform simulation device disclosed in the utility model embodiment has a simple structure and is easy to operate. The cam mechanism and the slide are matched to drive the piston rod to move back and forth. Compared with the crank rocker mechanism, the dead point is eliminated, and the stability and reliability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment detection, in particular to a sinusoidal breathing waveform simulation device. Background Art

[0002] In the ventilator detection, there is a test item that simulates the change pattern of the volume of breathing gas is a sine wave. The existing breathing simulation device produces a breathing airflow through the crank rocker mechanism and the piston rod of the cylinder. The breathing airflow is a sine wave, but there is a dead point in the transmission process of the crank rocker mechanism, resulting in poor working reliability.

[0003] Therefore, how to design a sinusoidal breathing waveform simulation device to improve working reliability is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a sinusoidal breathing waveform simulation device to improve the reliability of the work.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sinusoidal breathing waveform simulation device, comprising:

[0007] A gas cylinder, the gas cylinder including an inlet and an outlet for connecting to a ventilator;

[0008] A slide table, which is connected to the piston rod of the cylinder;

[0009] A cam mechanism, the cam mechanism is connected to the slide, and the cam mechanism drives the slide to move back and forth, thereby driving the piston rod to move back and forth;

[0010] The driving mechanism is connected with the cam mechanism in driving connection to drive the cam mechanism to rotate.

[0011] Optionally, in the above-mentioned sinusoidal breathing waveform simulation device, the cam mechanism includes:

[0012] Turntable support;

[0013] The turntable is arranged on a turntable support, and the driving mechanism is connected to the turntable to drive the turntable to rotate;

[0014] A sliding member bracket, the sliding member bracket is arranged on the turntable;

[0015] The sliding unit is fixed on the sliding bracket and is slidably matched with the sliding table.

[0016] Optionally, in the above-mentioned sinusoidal breathing waveform simulation device, the slide includes a hollow cavity, the hollow cavity is provided with a first slide rail, and the sliding member unit is slidably matched with the first slide rail.

[0017] Optionally, in the above-mentioned sinusoidal breathing waveform simulation device, it also includes a second slide rail and a support member, one end of the second slide rail is fixed on the cylinder, and the other end is fixed on the support member, the slide table includes a slide cavity, the second slide rail is passed through the slide cavity, and the extension direction of the first slide rail is perpendicular to the extension direction of the second slide rail.

[0018] Optionally, in the above-mentioned sinusoidal breathing waveform simulation device, the slide also includes a plug-in portion for inserting the piston rod, and the plug-in portion is provided with a hollow portion, and the hollow portion is used to place a connecting piece, and the connecting piece is fixedly connected to the piston rod.

[0019] Optionally, the above-mentioned sinusoidal breathing waveform simulation device further includes a turntable cover, which is arranged on the turntable. The turntable is provided with a rotating shaft, and the other end of the rotating shaft is fixed on the turntable cover. The sliding member bracket is arranged on the turntable cover.

[0020] Optionally, in the above-mentioned sinusoidal breathing waveform simulation device, the driving mechanism includes:

[0021] Drive motor;

[0022] A driving wheel, the driving wheel is fixedly connected to the output shaft of the driving motor;

[0023] A transmission belt is connected to the driving wheel and the turntable.

[0024] Optionally, the above-mentioned sinusoidal breathing waveform simulation device further includes a control module, and the control module is electrically connected to the drive motor.

[0025] Optionally, in the above-mentioned sinusoidal breathing waveform simulation device, a position detection component is further included, the position detection component is electrically connected to the control module, and the position detection component includes:

[0026] A position checking limit switch is arranged on the first end cover of the cylinder;

[0027] A grating encoding disk, wherein the grating encoding disk is arranged on the rotating shaft;

[0028] The encoder reader is arranged on the turntable support.

[0029] Optionally, the above-mentioned sinusoidal breathing waveform simulation device also includes a base plate and an outer shell, the cylinder, turntable support and driving mechanism are all arranged on the base plate, the outer shell cover is arranged on the outside of the cylinder, slide, cam mechanism and driving mechanism, and a control screen is arranged on the outer shell, which is connected to the control module.

[0030] The sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model has a simple structure and is easy to operate. It adopts a cam mechanism and a slide to drive the piston rod to move back and forth. Compared with the crank rocker mechanism, it eliminates the dead point and improves the working stability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the internal structure of a sinusoidal breathing waveform simulation device disclosed in an embodiment of the utility model;

[0033] Figure 2 It is a schematic diagram of the assembly of the cylinder disclosed in the embodiment of the utility model;

[0034] Figure 3 It is a schematic diagram of the assembly of the slide and cam mechanism disclosed in the embodiment of the utility model;

[0035] Figure 4 It is a schematic diagram of the assembly of the driving mechanism disclosed in the embodiment of the utility model;

[0036] Figure 5 This is a schematic diagram of the external structure of the sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model;

[0037] Figure 6 This is a schematic diagram of a sine wave disclosed in an embodiment of the utility model.

[0038] Figure 1-Figure 6 The meanings of the reference numerals in the figure are as follows:

[0039] 100 is a cylinder, 101 is a piston rod, 102 is a first end cover, 103 is a cylinder body, 104 is a piston, 105 is a second end cover, 106 is a piston ring, 107 is a third sealing ring, 108 is a first sealing ring, 109 is an air inlet and outlet, 110 is a second sealing ring, 111 is a cylinder connecting rod, 112 is a first fastener, 113 is a first bearing, 114 is a first wave spring, 115 is a first retaining ring, 116 is a connecting piece, 117 is a gasket, and 118 is a nut;

[0040] 200 is a cam mechanism, 210 is a turntable support, 220 is a turntable, 230 is a sliding member bracket, 240 is a sliding member unit, 250 is a turntable cover, 260 is a rotating shaft, 270a is a third bearing, 270b is a third retaining ring, 270c is a third fastener, 270d is a fourth retaining ring, 270e is a fourth bearing, 270f is a rotating shaft bearing, 270g is a fifth bearing, and 270h is a fourth fastener;

[0041] 300 is a driving mechanism, 310 is a driving motor, 320 is a driving wheel, 330 is a transmission belt, 340 is a motor support, 350 is a fifth fastener, 360 is a key, 370 is a driver, and 380 is a power module;

[0042] 400 is a slide table, 410 is a hollow cavity, 411 is a first slide rail, 420 is a slide cavity, and 430 is a plug-in portion;

[0043] 500 is a position detection component, 510 is a position check limit switch, 520 is a grating encoder disk, and 530 is an encoder reader;

[0044] 600 is a base plate, 610 is a base bolt, 620a is a sixth fastener, and 620b is a seventh fastener;

[0045] 700 is a housing, and 710 is a control screen;

[0046] 800 is a second slide rail, 810a is a second fastener, 810b is a second circlip retaining ring, 810c is a second wave spring, 810d is a second bearing;

[0047] 900 is a supporting member. DETAILED DESCRIPTION

[0048] With the development of ventilators and the improvement and standardization of ventilator technical index inspection requirements, the specialization and standardization of ventilator testing equipment is particularly important. According to the standard "YY 9706.270-2021 Medical Electrical Equipment" Part 2-70 "Special requirements for basic safety and basic performance of sleep apnea therapy equipment", the equipment requirements are 500mL output tidal volume; 1:1 breathing ratio; sine wave breathing state of gas; breathing rate of 10 times per minute, 15 times per minute and 20 times per minute.

[0049] In the ventilator detection, one of the detection items is that the change pattern of the volume of gas simulated by breathing is a sine wave. At present, most of the breathing simulation devices on the market are designed based on a screw or crank rocker mechanism to push the piston. In addition to the problems mentioned in the background technology, the following problems also exist in the prior art: (1) When using a screw method, the rotation direction of the motor needs to be changed during operation, and the motor speed needs to be changed at any time. Once a fault occurs or the device is out of control, the output waveform trend will change, or the device will be damaged, and the reliability is not high; (2) When using a crank rocker mechanism, if the motor works at a uniform speed, the sinusoidal wave shape of the output cannot be symmetrical. When the motor drives the disk to rotate, the swing arm connection point on the disk rotates in a circle with a radius of R. The length of the swing arm is LR, and the movement trend of the piston on the Y axis (the Y axis direction is parallel to the movement direction of the piston along the cylinder) is , from the formula, it can be concluded that the waveform is a non-standard sine wave. If the motor moves at a variable speed, the requirements for the motor will be relatively increased and the reliability will decrease.

[0050] The core of the utility model is to provide a sinusoidal breathing waveform simulation device to improve the working reliability.

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] like Figure 1 As shown, an embodiment of the utility model discloses a sinusoidal breathing waveform simulation device, including a cylinder 100, a slide 400, a cam mechanism 200 and a driving mechanism 300.

[0053] like Figure 2 As shown, the cylinder 100 includes a cylinder body 103, a piston rod 101, a piston 104, a piston ring 106, a first end cover 102 and a second end cover 105. The first end cover 102 and the second end cover 105 are respectively arranged at the two ends of the cylinder body 103. The second end cover 105 is provided with an air inlet and outlet 109. A first sealing ring 108 is arranged between the second end cover 105 and the air inlet and outlet 109. The air inlet and outlet 109 is used to connect an external pipeline. In this application, it is used to connect a ventilator, and a 22mm tapered connection port matching the size of the ventilator pipeline is used. It should be noted that the specific size of the air inlet and outlet 109 is not limited to the above structure and value. In order to reduce resistance, a hole connected to the air is provided on the first end cover 102.

[0054] In order to ensure sealing, a second sealing ring 110 is provided at the connection between the first end cover 102 and the cylinder body 103, and a third sealing ring 107 is provided at the connection between the second end cover 105 and the cylinder body 103, and the two are connected by a cylinder connecting rod 111, and the cylinder connecting rod 111 is fixed to the first end cover 102 and the second end cover 105 by a first fastener 112. The piston ring 106 is fixed on the piston 104, and the piston 104 is fixed to one end of the piston rod 101 by a nut 118 and a gasket 117. The other end of the piston rod 101 extends out of the first end cover 102, and the extended end is provided with a connecting piece 116. In order to reduce friction, a first bearing 113 is provided between the piston rod 101 and the first end cover 102. In order to prevent the first bearing 113 from slipping off the first end cover 102, a first retaining ring 115 is provided between the first bearing 113 and the first end cover 102. In order to avoid relative sliding between the first bearing 113 and the first retaining ring 115, a first wave spring 114 is provided between the first retaining ring 115 and the first bearing 113.

[0055] The cam mechanism 200 is connected to the slide 400, and the slide 400 is connected to the piston rod 101 of the cylinder 100. Specifically, a detachable connection method is adopted, which can be a threaded connection method or a pin connection method. The specific connection method is not specifically limited.

[0056] The driving mechanism 300 is connected to the cam mechanism 200 in transmission connection, driving the cam mechanism 200 to rotate. The rotation of the cam mechanism 200 drives the slide 400 to move back and forth, the slide 400 drives the piston rod 101 to move back and forth, and the piston rod 101 drives the piston 104 to move back and forth, thereby changing the volume of the cylinder body 103 and generating a breathing airflow, which flows out from the air inlet 109.

[0057] The sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model has a simple structure and is easy to operate. It adopts the cooperation mode of the slide 400 and the cam mechanism 200. Compared with the crank rocker mechanism, there is no dead point problem, which can improve the working reliability of the device.

[0058] like Figure 3As shown, the sine curve breathing waveform simulation device disclosed in the embodiment of the utility model, the cam mechanism 200 includes a turntable support 210, a turntable 220, a sliding member bracket 230 and a sliding member unit 240. Among them, the turntable support 210 is fixedly arranged to support the turntable 220, the turntable 220 is arranged on the turntable support 210, and the driving mechanism 300 is connected to the turntable 220 by transmission to drive the turntable 220 to rotate. In order to reduce the friction force when the turntable 220 rotates around the turntable support 242, a third bearing 270a and a fourth bearing 270e are arranged on the turntable support 210. In order to fix the turntable support 242 and the third bearing 270a and the fourth bearing 270e, a fourth retaining ring 270d is also provided.

[0059] The slide bracket 230 is disposed on the turntable 220, the slide unit 240 is fixed on the slide bracket 230, and the slide unit 240 is slidably matched with the slide table 400. When in use, the driving mechanism 300 drives the turntable 220 to rotate, and when the turntable 220 rotates, the slide bracket 230 drives the slide unit 240 to rotate, thereby pushing the slide table 400 to reciprocate, thereby driving the piston rod 101 to reciprocate.

[0060] On the basis of the above embodiment, the slide 400 includes a hollow cavity 410, the hollow cavity 410 is provided with a first slide rail 411, and the slide unit 240 slides with the first slide rail 411. Specifically, the first slide rail 411 is provided on the side wall of the hollow cavity 410. The slide unit 240 includes at least one slide, and the slide is in contact with the first slide rail 411 located on the two side walls of the hollow cavity 410. In a specific embodiment of the utility model, as shown in FIG. Figure 1 and Figure 3 As shown, the sliding member unit includes four sliding bearings, and the sliding bearings are provided with grooves that slide with the first slide rail 411 . The four sliding bearings are arranged in a rectangular shape, abutting against each other and respectively abutting against the first slide rail 411 .

[0061] In order to guide the reciprocating sliding of the slide 400, Figure 1 and Figure 3As shown, in a specific embodiment of the utility model, a second slide rail 800 and a support member 900 are also included. The support member 900 is arranged opposite to the cylinder 100 and supports the second slide rail 800. One end of the second slide rail 800 is fixed to the cylinder 100, and the other end is fixed to the support member 900. The extension direction of the second slide rail 800 is perpendicular to the extension direction of the first slide rail 411. Specifically, the second slide rail 800 is fixed to the first end cover 102 and the support member 900 by a second fastener 810a, and the second fastener 810a can be a top screw. In order to reduce friction, a second bearing 810d is arranged between the second slide rail 800 and the sliding cavity 420. Specifically, the second bearing 810d is a linear bearing. In order to prevent the second bearing 810d from axial movement, a second retaining ring 810b and a second wave spring 810c are arranged between the second bearing 810d and the sliding cavity 420.

[0062] In the sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model, when the turntable 220 rotates, it drives the sliding unit 240 fixed on the top to move around the circle with the axis of the turntable 220 as the center O and L as the radius. The value of the radius L needs to be calculated according to the value V of the output tidal volume (referring to the volume of air inhaled or exhaled each time during calm breathing), and the calculation is performed using the following formula:

[0063] (1)

[0064] Wherein, L is the distance from the center of the sliding unit 240 to the axis of the rotating disk 220, cm;

[0065] V is tidal volume, mL;

[0066] r is the inner wall radius of the cylinder body 103, cm;

[0067] The value of π is 3.14.

[0068] The sliding unit 240 pushes the slide 400 to reciprocate along the second slide rail 800, and at the same time drives the piston rod 101 to move. The movement of the piston rod 101 drives the piston 104 fixed at the other end to reciprocate in the cylinder body 103 to change the gas volume in the cylinder body 103. The connection and contact of the whole process are rigid connections, so the change rate and change trend of the gas are the same as the change rate and change trend of the projection of the sliding unit 240 on the Y-axis (the Y-axis direction is parallel to the movement direction of the piston rod 101 along the cylinder 100), or the same as the change trend of the Y-axis component of the movement of the sliding unit 240.

[0069] The projection of the slider unit 240 on the Y axis or the motion component on the Y axis is expressed and calculated as follows: According to mathematical theory, a sine wave can be represented by the projection of a point on a circle in a coordinate system. Specifically, a sine wave can be regarded as the projection of a point moving around a circle in the Y axis direction. Figure 6 The graph of the sine function and the function expression formula are as follows:

[0070] (2)

[0071] In the formula, is the rotation angle of the turntable 220 that changes with time.

[0072] The absolute value of the peak length of the unit circle's projection on the Y-axis is equal to the radius of the circle. If the radius of the circle is different, the peak value of the sine waveform will also change. The formula can be transformed into the following formula, introducing the amplitude of the sine wave.

[0073] (3)

[0074] Where A is the amplitude of the sine wave.

[0075] According to the above formula and the projection and change trend of the sliding unit 240 rotating around the turntable 220 on the Y axis, the change trend of the gas in the cylinder 100 is the same as the change trend of the sliding unit 240. Therefore, the change trend of the gas in the cylinder 100 is a sinusoidal function. The amplitude A is equal to the distance L from the center of the sliding unit 240 to the axis of the turntable 220. The distance L can be calculated based on the output tidal volume.

[0076] like Figure 2 and Figure 3 As shown, the slide 400 further includes a plug-in portion 430 for inserting the piston rod 101, and the plug-in portion 430 is provided with a hollow portion, and the hollow portion is used to place the connecting piece 116, and the connecting piece 116 is fixedly connected to the piston rod 101. That is, when connecting the piston rod 101 and the slide 400, the piston rod 101 is inserted into the plug-in portion, and then the connecting piece 116 is placed at the hollow portion position and fastened to the piston rod 101, so as to realize the connection between the piston rod 101 and the slide 400, and the setting of the plug-in portion 430 can ensure the firmness of the connection between the two.

[0077] like Figure 3As shown, in a specific embodiment of the utility model, a turntable cover 250 is further included. The turntable cover 250 is arranged on the turntable 220. Specifically, the turntable cover 250 is fixed to the turntable 220 by a third fastener 270c. A rotating shaft 260 is arranged on the turntable support 210. A rotating shaft bearing 270f is arranged on the turntable support 210. The other end of the rotating shaft 260 is fixed to the center of the turntable cover 250. The turntable cover 250 rotates synchronously with the rotating shaft 260. The sliding member bracket 230 is connected to the turntable cover 250 through the fifth bearing 270g. In order to fix the fifth bearing 270g and the turntable cover 250 and the sliding member bracket 230 and the fifth bearing 270g, a third retaining ring 270b is also arranged. The sliding member unit 240 is fixed to the sliding member bracket 230. Specifically, the sliding member unit 240 is fixed to the sliding member bracket 230 by a fourth fastener 270h. The fourth fastener 270h may be a nut. The sliding member bracket 230 is provided with a bolt. The bolt and the nut are threadedly matched to achieve the fixing of the sliding member unit 240. It should be noted that the distance L between the connection point of the sliding member bracket 230 and the turntable cover 250 and the axis of the turntable cover 250 is calculated and determined according to the formula (1) described above.

[0078] When the turntable 220 rotates, the turntable cover 250 is driven to rotate at the same time. When the turntable cover 250 rotates, the sliding member bracket 230 moves in a circle with the axis of the turntable cover 250 as the center and L as the radius. The sliding member unit 240 slides along the first slide rail 411, pushing the slide table 400 to slide back and forth along the second slide rail 800, thereby driving the piston rod 101 to move back and forth.

[0079] like Figure 4 As shown, in a specific embodiment of the utility model, the driving mechanism 300 includes a driving motor 310, a driving wheel 320 and a transmission belt 330, wherein the driving motor 310 is fixed to the motor support 340 by a fifth fastener 350, and the driving wheel 320 is fixedly connected to the output shaft of the driving motor 310. Specifically, the driving wheel 320 and the transmission belt 330 are connected by a key 360, and the transmission belt 330 is transmission-connected to the driving wheel 320 and the turntable 220. In order to facilitate the transmission connection between the turntable 220 and the transmission belt 330, the turntable 220 includes a transmission belt connecting portion and a turntable cover connecting portion, and the edge of the transmission belt connecting portion extends outward and protrudes from the turntable cover connecting portion.

[0080] In a specific embodiment, the speed ratio of the driving wheel 320 to the turntable 220 is 6:1, that is, the driving wheel 320 rotates six times and the turntable 220 rotates once. It should be noted that the speed ratio of the driving wheel 320 to the turntable 220 can also be other values, such as 1:1~15:1, which can be specifically set according to actual needs. The driving mechanism 300 also includes a driver 370 and a power module 380 that drive the driving motor 310 to work. The power module 380 supplies power to the driving motor 310. In order to detect the temperature of the power module 380, the driving motor 310 and the driver 370, a temperature measuring element is also provided.

[0081] The sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model only needs to keep the drive motor 310 running at a constant speed during operation, and the consistency of gas output is higher. The direction of the drive motor does not need to be changed during operation, which can improve the reliability of operation. If the drive motor 310 fails or loses control and cannot be stopped, the cylinder 100 will not be damaged, and the output gas change trend will still follow the law of the sine function.

[0082] In order to realize automatic control, the sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model further includes a control module, and the control module is electrically connected to the driving motor 310 , specifically, the control module is electrically connected to the driver 370 .

[0083] In order to detect the sliding position of the slide 400 and the rotation angle of the turntable cover 250, the sinusoidal breathing waveform simulation device disclosed in the embodiment of the utility model also includes a position detection component 500, and the position detection component 500 is electrically connected to the control module. Specifically, the position detection component 500 includes a position check limit switch 510, a grating code disk 520 and an encoder reader 530, and the position detection component 500 is arranged on the first end cover 102 of the cylinder 100, for checking whether the slide 400 slides to the position of the end, and the grating code disk 520 is arranged on the rotating shaft 260, for detecting the rotation angle and rotation speed of the turntable cover 250, and the rotation angle of the turntable cover 250 can be used to judge whether the sinusoidal breathing waveform simulation device is in an exhalation state or an inhalation state. The encoder reader 530 is arranged on the turntable support 210, and specifically, the encoder reader 530 can be fixed by studs and screws, and the data measured by the grating code disk 520 can be read by the encoder reader 530.

[0084] like Figure 4 and Figure 5As shown, in a specific embodiment of the utility model, a base plate 600 and a housing 700 are also included. The cylinder 100, the turntable support 210 and the driving mechanism 300 are all arranged on the base plate 600. In order to improve the stability of the device placement, a foot 610 is arranged on the base plate 600. Specifically, the motor support 340 is fixed to the base plate 600 by the sixth fastener 620a, and the driver 370 is fixed to the base plate 600 by the seventh fastener 620b. The base plate 600 is provided with a first mounting hole adapted to the turntable 342 and a second mounting hole adapted to the driving wheel 320. The housing 700 is arranged outside the cylinder 100, the slide 400, the cam mechanism 200 and the driving mechanism 300 to play a protective role. A control screen 710 is arranged on the housing 700, and the control screen 710 is connected to the control module.

[0085] When in use, the operator sets the required information through the control screen 710, and the control screen 710 transmits the control signal to the driver 270, and the driver 370 controls the operation of the drive motor 310. During operation, the position check limit switch 510 detects the position of the slide 400, the grating encoder disk 520 and the encoder reader 530 cooperate to detect the rotation angle of the turntable 220, and feeds back the detected position and angle signals to the control screen 710, and the temperature measurement element detects the temperature of the power module 380, the drive motor 310 and the driver 370, and feeds back the temperature signal to the control screen 710. The control screen 710 adjusts the control system according to the feedback data, and displays the feedback data and the operation status on the control screen 710.

[0086] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0087] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0088] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0089] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A sinusoidal breathing waveform simulation device, characterized in that: include: A cylinder (100), the cylinder (100) comprising an air inlet and an air outlet (109) for connecting to a ventilator; A slide table (400), wherein the slide table (400) is connected to the piston rod (101) of the cylinder (100); A cam mechanism (200), the cam mechanism (200) being connected to the slide table (400), the cam mechanism (200) driving the slide table (400) to move back and forth, thereby driving the piston rod (101) to move back and forth; A driving mechanism (300), the driving mechanism (300) being transmission-connected to the cam mechanism (200) to drive the cam mechanism (200) to rotate.

2. The sinusoidal breathing waveform simulation device according to claim 1, characterized in that: The cam mechanism (200) comprises: Turntable support (210); a turntable (220), the turntable (220) being arranged on the turntable support (210), the driving mechanism (300) being in driving connection with the turntable (220) so as to drive the turntable (220) to rotate; A sliding member bracket (230), wherein the sliding member bracket (230) is arranged on the rotating disk (220); A sliding member unit (240), wherein the sliding member unit (240) is fixed on the sliding member bracket (230), and the sliding member unit (240) is slidably matched with the sliding platform (400).

3. The sinusoidal breathing waveform simulation device according to claim 2, characterized in that: The slide table (400) comprises a hollow cavity (410), the hollow cavity (410) is provided with a first slide rail (411), and the slide unit (240) is slidably matched with the first slide rail (411).

4. The sinusoidal breathing waveform simulation device according to claim 3, characterized in that: It also includes a second slide rail (800) and a support member (900), one end of the second slide rail (800) is fixed to the cylinder (100), and the other end is fixed to the support member (900), the slide table (400) includes a slide cavity (420) arranged therein, the second slide rail (800) passes through the slide cavity (420), and the extension direction of the first slide rail (411) is perpendicular to the extension direction of the second slide rail (800).

5. The sinusoidal breathing waveform simulation device according to claim 4, characterized in that: The slide (400) further comprises an inserting portion (430) for the piston rod (101) to be inserted, the inserting portion (430) being provided with a hollow portion, the hollow portion being used for accommodating a connecting piece (116), the connecting piece (116) being fixedly connected to the piston rod (101).

6. The sinusoidal breathing waveform simulation device according to claim 2, characterized in that: It also comprises a turntable cover (250), the turntable cover (250) being arranged on the turntable (220), the turntable (220) being provided with a rotating shaft (260), the other end of the rotating shaft (260) being fixed on the turntable cover (250), and the sliding member bracket (230) being arranged on the turntable cover (250).

7. The sinusoidal breathing waveform simulation device according to claim 6, characterized in that: The driving mechanism (300) comprises: Drive motor (310); A driving wheel (320), the driving wheel (320) being fixedly connected to an output shaft of the driving motor (310); A transmission belt (330), the transmission belt (330) being transmission-connected to the driving wheel (320) and the rotating disk (220).

8. The sinusoidal breathing waveform simulation device according to claim 7, characterized in that: It also includes a control module, which is electrically connected to the drive motor (310).

9. The sinusoidal breathing waveform simulation device according to claim 8, characterized in that: It also includes a position detection component (500), the position detection component (500) is electrically connected to the control module, and the position detection component (500) includes: A position checking limit switch (510) is arranged on the first end cover (102) of the cylinder (100); a grating encoding disk (520), wherein the grating encoding disk (520) is arranged on the rotating shaft (260); The encoder reading head (530) is arranged on the turntable support (210).

10. The sinusoidal breathing waveform simulation device according to claim 8, characterized in that: The invention also comprises a bottom plate (600) and a housing (700), wherein the cylinder (100), the turntable support (210) and the driving mechanism (300) are all arranged on the bottom plate (600), and the housing (700) covers the outside of the cylinder (100), the slide table (400), the cam mechanism (200) and the driving mechanism (300), and an operating screen (710) is arranged on the housing (700), and the operating screen (710) is connected to the control module.

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