A vital capacity training device

Abstract

The present invention provides a lung capacity training device, comprising a shell, an air inlet and an air outlet are provided on the shell, a mounting shaft is rotatably provided on the shell, a plurality of groups of air guides are provided on the mounting shaft, and a shifting block is provided on the outer circumferential surface of the mounting shaft; a vibration plate is provided on the shell, and the vibration plate is shifted by the shifting block to vibrate and make a sound during the rotation of the mounting shaft; an adjustment frame is slidably provided on the shell, and the adjustment frame is sleeved on the vibration plate; a linkage mechanism connected to the mounting shaft and the adjustment frame is provided on the shell, and the linkage mechanism controls the adjustment frame to slide along the axis of the vibration plate to adjust the vibration length of the vibration plate during the rotation of the mounting shaft. The training device can improve the user's enthusiasm for actively exercising lung capacity, and at the same time, the user can intuitively judge the size of his own lung capacity according to the tone of the sound emitted by the vibration plate, so as to know the training effect.

Description

Technical Field

[0001] The present invention particularly relates to a lung capacity training device. Background Art

[0002] People have the largest lung capacity when they are in their prime, and it gradually decreases with age, but people who exercise regularly can still maintain a large lung capacity. Generally, the healthier the person, the greater the lung capacity. People with large lung capacity breathe more deeply and their lungs can breathe in and out more completely, which is conducive to better gas exchange inside and outside the body and is beneficial to health.

[0003] Patients with diseases such as upper respiratory tract infection and acute bronchitis will experience a significant decrease in lung capacity after surgical treatment. In order to improve the lung capacity of these patients, relevant equipment is needed to train their lung capacity.

[0004] For example, the Chinese invention patent with patent number 202010091615.5 provides a respiratory medicine vital capacity training device. Through the cooperation of the sliding mechanism and the monitoring mechanism of the device, the patient's exhaled air volume can be trained, and then the patient's exhaled air volume can be enhanced through the adjustment mechanism to adjust the training intensity. However, the training process of traditional vital capacity training equipment is relatively boring, and it is difficult to arouse the user's interest in independent training, which leads to a decrease in the efficiency of vital capacity training. At the same time, it is not convenient for users to know the results of vital capacity training more intuitively. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a vital capacity training device to solve the technical problem raised in the above background technology that traditional vital capacity training equipment cannot attract users to independently improve their enthusiasm for training vital capacity, thereby resulting in a decrease in the efficiency of vital capacity training, and at the same time it is not convenient for users to know the effectiveness of vital capacity training more intuitively.

[0006] To achieve the above object, the present invention provides the following technical solution, a lung capacity training device, comprising:

[0007] A shell, wherein an air inlet and an air outlet are provided on the shell;

[0008] A mounting shaft is rotatably arranged on the housing, a plurality of groups of air guides are arranged at intervals on the circumference of the mounting shaft, the air guides are arranged between the air flow channels formed by the air inlet and the air outlet, the air flows between the flow channels through the air guides to drive the mounting shaft to rotate, and a shifting block is arranged on the outer circumferential surface of the mounting shaft;

[0009] A vibration plate, one end of which is fixedly connected to the housing, and during the rotation of the mounting shaft, the vibration plate is moved by the shifting block to make it vibrate and produce sound;

[0010] Adjusting frame, slidably arranged on the housing along the axis direction of the vibrating piece and sleeved on the vibrating piece; and

[0011] Linkage mechanism, arranged on the housing and connected to the mounting shaft and the adjusting frame to control the adjusting frame to slide along the axis of the vibrating piece to adjust the vibrating length of the vibrating piece during the rotation of the mounting shaft.

[0012] Furthermore, the linkage mechanism includes a transmission component and a connecting rod component, and the transmission component includes:

[0013] First gear, arranged at one end of the mounting shaft and coaxial with the mounting shaft;

[0014] Second gear, rotatably arranged on the housing along its axis, the first gear meshes with the second gear, the number of teeth of the second gear is greater than that of the first gear, and the connecting rod component is connected to the second gear and the adjusting frame to convert the rotation of the second gear into driving the adjusting frame to slide.

[0015] Furthermore, the connecting rod component includes a transmission rod, an installation column is eccentrically arranged on the second gear, one end of the transmission rod is hinged to the installation column, and the other end is hinged to the adjusting frame.

[0016] Furthermore, a reset component is arranged at one end of the mounting shaft to control the reset of the rotated mounting shaft through the reset component.

[0017] Furthermore, the reset component includes a scroll spring, a fixed seat is arranged on the housing, and both ends of the scroll spring are respectively connected to the mounting shaft and the fixed seat.

[0018] Furthermore, a shielding shell is arranged on the housing, the linkage mechanism is arranged in the shielding shell, and a sounding groove is opened on the shielding shell.

[0019] Furthermore, an installation groove is arranged on the housing, and a resistance adjusting mechanism for adjusting the rotation resistance of the mounting shaft is arranged in the installation groove. The resistance adjusting mechanism includes:

[0020] Brake shell, rotatably arranged in the installation groove and coaxially connected to the other end of the mounting shaft;

[0021] Movable block, arranged in the brake shell;

[0022] Brake frame, arranged at one end of the movable block and slidably connected to the movable block along its axis. An elastic member is arranged between the brake frame and the movable block. A friction plate is arranged at one end of the brake frame, and the friction plate contacts the inner side surface of the brake shell; and

[0023] A control component is arranged in the installation groove to control the sliding of the movable block.

[0024] Furthermore, the control component includes:

[0025] A shielding cover is fixedly arranged at the opening of the installation groove. A sliding groove is formed in the shielding cover. A positioning slider is arranged on the movable block, and the positioning slider is slidably clamped in the sliding groove along the extending direction of the sliding groove.

[0026] A control disk is rotatably arranged in the brake housing along its axis. An inclined groove is eccentrically formed in the control disk. A control column is arranged on the movable block, and the control column is slidably clamped in the inclined groove along the extending direction of the inclined groove.

[0027] A control knob is arranged outside the shielding cover and is coaxially connected to the control disk.

[0028] Furthermore, a clamping block is arranged on the control knob on the side opposite to the shielding cover. A plurality of groups of annularly spaced card slots are formed in the shielding cover on the side opposite to the control knob, and the clamping block is clamped in one of the card slots.

[0029] Furthermore, a detachable breathing mask is arranged on the air inlet. A saliva filter element is arranged in the breathing mask. A detachable dust-proof net is arranged on the air outlet.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. When the vital capacity training device is in use, breathing is carried out through the air inlet. When exhaling, the airflow flows in the housing and drives the installation shaft to rotate through a plurality of groups of air guiding members. During the rotation of the installation shaft, the vibration piece is vibrated to generate sound by the dialing block. And during the rotation of the installation shaft, the adjustment frame is driven to move along the axis direction of the vibration piece through the linkage mechanism, so that the vibration length of the vibration piece is gradually reduced, so that the pitch of the sound emitted by the vibration piece becomes higher and higher. The user can gradually increase the breathing intensity through the guidance of the sound during the training process, so as to improve the enthusiasm of the user for actively exercising the vital capacity and improve the efficiency of training the vital capacity. At the same time, the user can intuitively judge the size of his own vital capacity according to the pitch of the sound emitted by the vibration piece, so as to know the training effect.

[0032] 2. When the vital capacity training device is in use, the control knob can be rotated to drive the control disk to rotate. Since the movable block can only translate along the chute, the control disk can drive the movable block to move through the cooperation of the inclined chute and the control column during the rotation process. During the movement of the movable block, the elastic member is squeezed, so that the resistance between the friction plate on one side of the brake frame and the brake housing increases, thereby increasing the resistance during the breathing process and adjusting the intensity of training the vital capacity of the user. Moreover, the block on one side of the control knob can be clamped in the card slots at different positions to fix the position of the control knob, thereby grading and adjusting the friction force received by the brake housing, which is convenient for users with different needs to perform vital capacity training. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. In all the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0034] Figure 1 Schematic three-dimensional structure diagram of a vital capacity training device provided by the present invention;

[0035] Figure 2 Schematic structure diagram of a disassembled vital capacity training device of the present invention;

[0036] Figure 3 Schematic structure diagram of a resistance adjusting mechanism in a vital capacity training device of the present invention;

[0037] Figure 4 For Figure 3 Enlarged schematic diagram of area a in

[0038] Figure 5 Schematic structure diagram of a mounting shaft in a vital capacity training device of the present invention;

[0039] Figure 6 Schematic structure diagram of a driving mechanism in a vital capacity training device of the present invention;

[0040] Figure 7 Schematic structure diagram of a housing in a vital capacity training device of the present invention;

[0041] Figure 8 Schematic structure diagram of a transmission disk in a vital capacity training device of the present invention;

[0042] Figure 9 Schematic structure diagram of a mounting cover in a vital capacity training device of the present invention.

[0043] Reference numerals:

[0044] 101. Housing; 102. Air inlet; 103. Air outlet; 104. Installation groove; 105. Saliva filter element; 106. Respiratory mask; 107. Dust-proof net;

[0045] 201. Shielding shell; 202. Sound slot;

[0046] 301. Installation shaft; 302. Windshield; 303. Brake housing; 304. First gear; 305. Pusher block;

[0047] 401. Second gear; 402. Installation post; 403. Transmission rod; 404. Adjustment frame; 405. Slide rail; 406. Vibration piece;

[0048] 501. Volute spring; 502. Fixed seat;

[0049] 601. Movable block; 602. Brake frame; 603. Friction plate; 604. Control column; 605. Positioning slider; 606. Elastic member;

[0050] 701. Shielding cover; 702. Chute; 703. Card slot;

[0051] 801. Control disk; 802. Inclined slot; 803. Control knob; 804. Locking block. Detailed implementation mode

[0052] Hereinafter, embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0053] Embodiment:

[0054] As Figure 1 , 2 , as shown in FIGS. 3, the present invention provides a vital capacity training device, including a housing 101, an air inlet 102 and an air outlet 103 are formed on the housing 101, an installation shaft 301 rotatable along its axis is arranged on the housing 101, and a plurality of groups of air guiding members are circumferentially arranged at intervals on the installation shaft 301. The air guiding members include a windshield 302, and the windshield 302 is arranged between the air flow channels formed by the air inlet 102 and the air outlet 103. A detachable respiratory mask 106 is arranged on the air inlet 102, a saliva filter element 105 is arranged in the respiratory mask 106, and a detachable dust-proof net 107 is arranged on the air outlet 103.

[0055] When the device is in use, the patient can breathe through the breathing mask 106. During the breathing process, the patient seals the gap between the patient's mouth and the device through the breathing mask 106, thereby preventing gas leakage and improving the training effect. During the breathing process, the patient filters the moisture and saliva in the patient's exhaled gas through the saliva filter 105, and the dustproof net 107 prevents external dust from entering the patient's lungs, thereby improving the safety during the training process. In addition, during the breathing process, the patient's air flow flows between the air inlet 102 and the air outlet 103, and during the flow of gas, the windshield 302 drives the installation shaft 301 to rotate.

[0056] like Figure 5 , 6 As shown in Figures 7 and 8, in the present embodiment, one end of the mounting shaft 301 passes through the shell 101 and extends outward, and a shift block 305 is provided on the outer circumferential surface of the end of the mounting shaft 301 passing through the outside of the shell 101, and one end of the vibration plate 406 is fixedly connected to the outer side of the shell 101. During the rotation of the mounting shaft 301, the vibration plate 406 is shifted by the shift block 305 to make it vibrate and make a sound, and an adjustment frame 404 is provided on the shell 101 to slide along the axial direction of the vibration plate 406, and the adjustment frame 404 is sleeved on the vibration plate 406. A linkage mechanism connected with the mounting shaft 301 and the adjustment frame 404 is provided on the shell 101, and the vibration length of the vibration plate 406 is adjusted by controlling the adjustment frame 404 to slide along the axial direction of the vibration plate 406 during the rotation of the mounting shaft 301 through the linkage mechanism.

[0057] The linkage mechanism includes a transmission assembly and a connecting rod assembly. The transmission assembly includes a first gear 304 which is coaxially arranged at one end of the mounting shaft 301. A second gear 401 which can rotate along its axis is arranged on the housing 101. The second gear 401 is meshed with the first gear 304. The first gear 304 is meshed with the second gear 401. The number of teeth of the second gear 401 is greater than the number of teeth of the first gear 304. The connecting rod assembly is connected to the second gear 401 and the adjustment frame 404 to convert the rotation of the second gear 401 into driving the adjustment frame 404 to slide. The connecting rod assembly includes a transmission rod 403. A mounting column 402 is eccentrically arranged on the second gear 401. One end of the transmission rod 403 is hinged to the mounting column 402, and the other end is hinged to the adjustment frame 404.

[0058] When the patient controls the installation shaft 301 to rotate during exhalation, the first gear 304 at one end of the installation shaft 301 rotates. Since the number of teeth of the second gear 401 is greater than that of the first gear 304, the first gear 304 causes the second gear 401 to rotate slowly during the rotation, thereby driving the installation column 402 on the second gear 401 to move.

[0059] Moreover, since the sliding rail 405 extending along the axis direction of the vibrating piece 406 is provided on the housing 101, the adjusting frame 404 is slidably arranged on the sliding rail 405 along the extending direction of the sliding rail 405. During the movement of the mounting post 402, the adjusting frame 404 can be driven to move linearly along the sliding rail 405 through the transmission rod 403, so that the vibrating length of the vibrating piece 406 changes, and the pitch of the sound emitted during the vibration of the vibrating piece 406 changes. During exhalation, the pitch of the sound emitted by the vibrating piece 406 becomes higher and higher, and during inhalation, the pitch of the sound emitted by the vibrating piece 406 becomes lower and lower. The user can gradually increase the intensity of breathing through the guidance of the sound during training, thereby effectively attracting the patient to increase the breathing force, improving the patient's enthusiasm for vital capacity training, and improving the effect of the patient's vital capacity training. At the same time, the patient can also timely, accurately and intuitively know the training intensity and training effect according to the change of the pitch, improving the practicability of the vital capacity training device.

[0060] In addition, in some embodiments, the transmission component in the linkage mechanism can also control the movement of the mounting post 402 by using a pulley and a transmission belt, and the position of the mounting post 402 can be selected according to the specific use scenario.

[0061] As Figure 6 shown, in this embodiment, one end of the mounting shaft 301 is connected with a reset component for resetting. The reset component includes a volute spring 501. A fixed seat 502 is provided on the housing 101, and one end of the volute spring 501 is fixedly connected with the fixed seat 502. During the process that the patient controls the rotation of the mounting shaft 301 during breathing, the volute spring 501 is deformed. After the training stops, the mounting shaft 301 can be controlled to reset under the reset ability of the volute spring 501, so that the second gear 401 and the adjusting frame 404 are reset for the next breathing training.

[0062] As Figure 2 shown, in this embodiment, a shielding shell 201 is provided on the housing 101. The linkage mechanism is arranged in the shielding shell 201, and a sound emitting groove 202 is opened on the shielding shell 201. The shielding shell 201 shields the linkage mechanism to prevent external objects from interfering with the movement of the linkage mechanism, and at the same time improves the service life of the device. Moreover, during the sound emission of the vibrating piece 406, the sound can be transmitted to the patient through the sound emitting groove 202, enabling the patient to more intuitively know the training situation.

[0063] As Figure 3 、 4As shown, in this embodiment, an installation groove 104 is provided on the housing 101. The installation groove 104 is provided with a resistance adjustment mechanism for adjusting the rotation resistance of the installation shaft 301. The resistance adjustment mechanism includes a brake housing 303 rotatably arranged in the installation groove 104. The brake housing 303 is coaxially connected to the other end of the installation shaft 301. During the process of the patient controlling the rotation of the installation shaft 301 during breathing, the brake housing 303 can be driven to rotate in the installation groove 104.

[0064] An active block 601 is arranged in the brake housing 303. One end of the active block 601 is provided with a brake frame 602. The brake frame 602 is slidably connected to the active block 601 along its axis. An elastic member 606 is arranged between the brake frame 602 and the active block 601. One end of the brake frame 602 is provided with a friction plate 603. The friction plate 603 contacts the inner side surface of the brake housing 303.

[0065] During the rotation of the brake housing 303, the brake frame 602 makes the friction plate 603 contact the inner side surface of the brake housing 303 under the action of the elastic member 606, so as to increase the resistance received by the brake housing 303 during rotation through the friction plate 603, in order to increase the resistance generated during the patient's breathing process during training. It can be understood that in some embodiments, the elastic member 606 can be selected from elastic objects such as springs, elastic columns, and elastic blocks, and the friction plate 603 can be made of materials with relatively large friction such as rubber.

[0066] As Figure 2 、 4 As shown in Figures 8 and 9, in this embodiment, a control component is provided on the shielding cover 701. The active block 601 is controlled to slide along the sliding groove 702 through the control component. The control component includes a control disk 801 arranged in the brake housing 303. An inclined groove 802 is eccentrically opened on the control disk 801. A control column 604 is arranged on the active block 601. The control column 604 is slidably clamped in the inclined groove 802 along the extending direction of the inclined groove 802. A control knob 803 is arranged outside the shielding cover 701. The control knob 803 is coaxially connected to the control disk 801. The shielding cover 701 is fixedly arranged at the opening of the installation groove 104. A sliding groove 702 is opened on the shielding cover 701. A positioning slider 605 is arranged on the active block 601. The positioning slider 605 is slidably clamped in the sliding groove 702 along the extending direction of the sliding groove 702.

[0067] The control knob 803 can be rotated to drive the control disk 801 to rotate, and since the movement of the movable block 601 is affected by the coordinated movement of the slide groove 702 and the positioning slider 605, it can only slide along the extension direction of the slide groove 702. During the rotation process, the control disk 801 can drive the movable block 601 to translate through the coordinated movement of the inclined groove 802 and the control column 604, so that the distance between the movable block 601 and the brake frame 602 is reduced to squeeze the elastic member 606. After being squeezed, one end of the elastic member 606 generates a certain thrust on the brake frame 602, thereby increasing the friction between the friction plate 603 and the brake housing 303 to increase the intensity of the training.

[0068] like Figure 8 , 9 As shown, in some embodiments, a block 804 is provided on the side of the control knob 803 opposite to the shielding cover 701, and a plurality of groups of slots 703 spaced and distributed circumferentially are provided on the side of the shielding cover 701 opposite to the control knob 803, and the block 804 is inserted into one of the slots 703. The intensity of training can be adjusted in stages by rotating the control knob 803 so as to adapt to the use of patients with different training needs.

[0069] Specific usage and beneficial effects of the present invention:

[0070] When the vital capacity training device is in use, the patient can breathe through the air inlet 102. When exhaling, the airflow flows between the air inlet 102 and the air outlet 103, thereby driving the installation shaft 301 to rotate through the multiple wind shields 302. During the rotation of the installation shaft 301, the vibration plate 406 is moved by the shift block 305 to vibrate and make a sound. During the rotation of the installation shaft 301, the first gear 304 is driven to rotate. The first gear 304 controls the movement of the eccentrically arranged installation column 402 on the second gear 401 by meshing with the second gear 401. During the movement, the column 402 drives the adjustment frame 404 to move along the axis direction of the vibration plate 406 on the slide rail 405 through the transmission rod 403, so that the vibration length of the vibration plate 406 gradually decreases, so that the tone of the sound emitted by the vibration plate 406 becomes higher and higher. Similarly, when the patient inhales, the tone of the sound emitted by the vibration plate 406 becomes lower and lower. The user can gradually increase the intensity of breathing through the guidance of sound during the training process, thereby increasing the user's enthusiasm for actively exercising lung capacity and improving the efficiency of lung capacity training. At the same time, the user can intuitively judge the size of his own lung capacity according to the tone of the sound emitted by the vibration plate 406, so as to know the training effect.

[0071] When the vital capacity training device is in use, the control knob 803 can be rotated to drive the control disk 801 to rotate. Since the movable block 601 can only translate along the chute 702, the control disk 801 can drive the movable block 601 to move through the cooperation of the inclined groove 802 and the control column 604 during the rotation process. During the movement of the movable block 601, the elastic member 606 is squeezed, so that the resistance between the friction plate 603 on one side of the brake frame 602 and the brake housing 303 is increased, thereby increasing the resistance received during the breathing training, so as to adjust the intensity of training the vital capacity of the user. Moreover, the block 804 on one side of the control knob 803 can be clamped in the card slots 703 at different positions to fix the position of the control knob 803, thereby performing a hierarchical adjustment of the friction force received by the brake housing 303, which is convenient for users with different needs to perform vital capacity training.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments.

Claims

1. A vital capacity training device, characterized in that, Included are: A housing (101), wherein the housing (101) is provided with an air inlet (102) and an air outlet (103); A mounting shaft (301) is rotatably arranged on the housing (101); a plurality of groups of air guides are arranged at intervals on the circumference of the mounting shaft (301); the air guides are arranged between air flow channels formed by the air inlet (102) and the air outlet (103); air flows between the flow channels through the air guides to drive the mounting shaft (301) to rotate; and a shifting block (305) is arranged on the outer circumferential surface of the mounting shaft (301); A vibration plate (406) having one end fixedly connected to the housing (101), and the vibration plate (406) is moved by the shifting block (305) during the rotation of the installation shaft (301) to vibrate and generate sound; An adjustment frame (404) is slidably disposed on the housing (101) along the axial direction of the vibration sheet (406) and sleeved on the vibration sheet (406); and A linkage mechanism is arranged on the housing (101) and connected to the mounting shaft (301) and the adjustment frame (404) so ​​as to control the adjustment frame (404) to slide along the axis of the vibration plate (406) during the rotation of the mounting shaft (301) to adjust the vibration length of the vibration plate (406).

2. The vital capacity training device according to claim 1, characterized in that, The linkage mechanism includes a transmission assembly and a connecting rod assembly, and the transmission assembly includes: A first gear (304) is disposed at one end of the installation shaft (301) and is coaxial with the installation shaft (301); The second gear (401) is rotatably arranged on the housing (101) along its axis, the first gear (304) is meshed with the second gear (401), the number of teeth of the second gear (401) is greater than the number of teeth of the first gear (304), and the connecting rod assembly is connected to the second gear (401) and the adjustment frame (404) to convert the rotation of the second gear (401) into driving the adjustment frame (404) to slide.

3. The vital capacity training device according to claim 2, characterized in that: The connecting rod assembly comprises a transmission rod (403), a mounting column (402) is eccentrically arranged on the second gear (401), one end of the transmission rod (403) is hinged to the mounting column (402), and the other end is hinged to the adjustment frame (404).

4. A vital capacity training device according to claim 1, characterized in that: A reset component is provided at one end of the installation shaft (301), and the reset component is used to control the installation shaft (301) to reset after rotation.

5. The vital capacity training device according to claim 4, characterized in that: The reset assembly comprises a spiral spring (501), a fixing seat (502) is provided on the housing (101), and two ends of the spiral spring (501) are respectively connected to the mounting shaft (301) and the fixing seat (502).

6. The vital capacity training device according to claim 1, wherein: A shielding shell (201) is provided on the housing (101), the linkage mechanism is arranged inside the shielding shell (201), and a sound-generating groove (202) is provided on the shielding shell (201).

7. A vital capacity training device according to claim 1, characterized in that: The housing (101) is provided with a mounting groove (104), and the mounting groove (104) is provided with a resistance adjustment mechanism for adjusting the rotation resistance of the mounting shaft (301), and the resistance adjustment mechanism comprises: The brake housing (303) is rotatably arranged in the installation groove (104) and is coaxially connected to the other end of the installation shaft (301); The movable block (601) is arranged in the brake housing (303); The brake frame (602) is arranged at one end of the movable block (601) and is slidably connected to the movable block (601) along its axis. An elastic member (606) is arranged between the brake frame (602) and the movable block (601). A friction plate (603) is arranged at one end of the brake frame (602), and the friction plate (603) contacts the inner side surface of the brake housing (303); and The control assembly is arranged in the installation groove (104) to control the sliding of the movable block (601).

8. A vital capacity training device according to claim 7, wherein, The control assembly includes: The shielding cover (701) is fixedly arranged at the opening of the installation groove (104). A sliding groove (702) is formed in the shielding cover (701). A positioning slider (605) is arranged on the movable block (601), and the positioning slider (605) is slidably clamped in the sliding groove (702) along the extending direction of the sliding groove (702); The control disk (801) is rotatably arranged in the brake housing (303) along its axis. An inclined groove (802) is eccentrically formed in the control disk (801). A control column (604) is arranged on the movable block (601), and the control column (604) is slidably clamped in the inclined groove (802) along the extending direction of the inclined groove (802); The control knob (803) is arranged outside the shielding cover (701) and is coaxially connected to the control disk (801).

9. A vital capacity training device according to claim 8, characterized in that: A clamping block (804) is arranged on the control knob (803) on the side opposite to the shielding cover (701). A plurality of groups of annularly spaced card slots (703) are formed in the shielding cover (701) on the side opposite to the control knob (803), and the clamping block (804) is clamped in one of the card slots (703); 10. A vital capacity training device according to claim 1, characterized in that: A detachable breathing cover (106) is arranged on the air inlet (102). A saliva filter element (105) is arranged in the breathing cover (106). A detachable dust-proof net (107) is arranged on the air outlet (103).

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