Lung function instrument

Abstract

The invention discloses a lung function instrument which comprises a shell, a through hole is formed in the shell, and a pressure difference measuring airway or a muscle force measuring airway can penetrate through the through hole; a soft layer is further arranged in the shell, and when the pressure difference measuring air channel is installed in the through hole, the pressure difference measuring air channel presses the soft layer and is communicated with the soft layer, so that the pressure difference measuring air channel can be used for detecting the expiration pressure difference and / or the inspiration pressure difference; when the muscle force measuring air channel is installed in the through hole, the muscle force measuring air channel presses the soft layer and is communicated with the soft layer, and therefore the muscle force measuring air channel is used for detecting muscle force. When the pressure difference measuring airway / muscle force measuring airway is inserted into the through hole in the shell, the soft layer is extruded, so that the pressure difference measuring airway or the muscle force measuring airway is in interference fit with the soft layer and is more and more tightly pressed, and therefore, tight attachment can be ensured, errors in the assembly and disassembly processes are reduced, the overall assembly precision is improved, and the production cost is reduced. The stability and accuracy of mechanical parts in the operation process are ensured, the operation stability of mechanical equipment is improved, and the sealing effect can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a pulmonary function meter. Background Art

[0002] A spirometer is a medical device used to measure the volume of air inhaled and exhaled by the lungs. It can perform lung function tests and track lung health. It can measure common lung function test parameters including FVC (forced vital capacity), FEV1 (forced vital capacity in one second), FEV1 / FVC (one-second rate), and the ratio of forceful vital capacity in one second to forced vital capacity.

[0003] The spirometry can measure vital capacity, expiratory flow rate, airway resistance and other indicators to help assess whether the patient's respiratory function is normal. It can also detect the age of the lungs, minute ventilation and maximum ventilation, and provide doctors with detailed lung function data. Through the detection of the spirometry, doctors can promptly detect lung diseases or injuries, such as asthma, chronic obstructive pulmonary disease, etc., and understand the development of the disease, providing important reference for doctors, helping to formulate and adjust treatment plans, and monitor treatment effects.

[0004] However, the pulmonary function meter in the prior art has poor stability and accuracy due to the insufficient sealing between the airway components. Summary of the invention

[0005] The embodiment of the present application provides a pulmonary function meter, which solves the technical problem that the pulmonary function meter in the prior art has poor stability and accuracy due to insufficient sealing between airway components.

[0006] In order to solve the above technical problems, an embodiment of the present application provides a pulmonary function instrument, including a shell, wherein a perforation is formed on the shell, and the perforation can be penetrated by a pressure difference measurement airway or a muscle strength measurement airway;

[0007] A soft layer is also provided in the housing. When the pressure difference measuring airway is installed in the perforation, the pressure difference measuring airway presses the soft layer and communicates with the soft layer, so that it can be used to detect the expiratory pressure difference and / or the inspiratory pressure difference.

[0008] When the muscle force measurement airway is installed in the perforation, the muscle force measurement airway compresses the soft layer and communicates with the soft layer, so as to be used for detecting muscle force.

[0009] Furthermore, a transfer seat is provided in the housing, and the soft layer is provided on the transfer seat;

[0010] When the pressure difference measuring airway or the muscle strength measuring airway is inserted into the perforation and in place, the pressure difference measuring airway or the muscle strength measuring airway squeezes the soft layer and communicates with the adapter through the soft layer.

[0011] Furthermore, a pressure sensor, a muscle force sensor and a microprocessor are also provided in the housing;

[0012] When the pressure difference measuring airway is inserted into the perforation and in place, the pressure difference measuring airway is connected to the microprocessor via the soft layer, the adapter, and the pressure sensor, the pressure sensor acquires pressure data, and the microprocessor calculates the expiratory pressure difference and / or the inspiratory pressure difference according to the pressure data;

[0013] When the muscle force measurement airway is inserted into the perforation and is in place, the muscle force measurement airway is connected to the microprocessor via the soft layer, the adapter, and the muscle force sensor, the muscle force sensor acquires muscle force data, and the microprocessor calculates the muscle force size based on the muscle force data.

[0014] Furthermore, locking jaws are provided on the outer circumferences of the pressure difference measurement airway and the muscle strength measurement airway, and fixing grooves are correspondingly provided on the inner walls of the perforations;

[0015] After the pressure difference measuring airway or the muscle strength measuring airway is inserted into the through hole, the locking jaw is clamped into the corresponding fixing groove, and the pressure difference measuring airway or the muscle strength measuring airway is positioned in the through hole.

[0016] Furthermore, the housing is provided with an adapter column, and the pulmonary function instrument further comprises a decorative fixed rotating cover that can be fastened on the adapter column;

[0017] When the decorative fixed rotating cover is screwed onto the adapter post, the centers of the decorative fixed rotating cover and the adapter post can be passed through by the differential pressure measuring airway or the muscle strength measuring airway; at the same time, the decorative fixed rotating cover can limit the differential pressure measuring airway or the muscle strength measuring airway in the through hole.

[0018] Furthermore, a plurality of connection undercuts are arranged on the outer peripheral wall of the adapter column at axial intervals around the through hole;

[0019] The rear end surface of the decorative fixed rotating cover is provided with limiting grooves corresponding to the locking fixtures, and the limiting grooves are provided with lock buckles;

[0020] When the decorative fixed rotating cover is screwed onto the adapter column, the locking fixture is fixed with the locking buckle in the limiting groove.

[0021] Furthermore, the pressure difference measuring airway and the muscle strength measuring airway are respectively provided with shaft shoulders; the inner wall of the rear end of the perforation is provided with a step contact surface; and the inner wall of the decorative fixed rotating cover is provided with an airway limit block;

[0022] After the pressure difference measuring airway or the muscle strength measuring airway is inserted into the through hole, the decorative fixed rotating cover is fixed on the adapter column, the airway limit block is in contact with the front end surface of the shoulder, and the rear end surface of the shoulder is in contact with the step contact surface, and the pressure difference measuring airway or the muscle strength measuring airway is fixed between the step contact surface and the airway limit block.

[0023] Furthermore, a first collection tube and a second collection tube are respectively provided on one side outside the differential pressure measurement airway, both of which are connected and communicated with the differential pressure measurement airway, a filter mesh is provided in the differential pressure measurement airway, and the first collection tube and the second collection tube are respectively located at the front side and the rear side of the filter mesh;

[0024] A third collection tube connected to and in communication with the muscle strength measurement airway is provided on one side outside the muscle strength measurement airway;

[0025] The adapter seat is provided with a first adapter tube, a third adapter tube and a second adapter tube in sequence from front to back;

[0026] The soft layer is respectively provided with a first through hole sleeved on the first transfer tube, a second through hole sleeved on the second transfer tube, and a third through hole sleeved on the third transfer tube;

[0027] When the soft layer is not under pressure, the first through hole is higher than the upper end of the first transfer tube, the second through hole is higher than the upper end of the second transfer tube, and the third through hole is higher than the upper end of the third transfer tube;

[0028] After the pressure difference measurement airway or the muscle strength measurement airway is installed in place in the perforation, the first collection tube and the second collection tube will pass through the first through hole and the second through hole respectively and be aligned with and connected to the first transfer tube and the second transfer tube respectively; or, the third collection tube will pass through the third through hole and be aligned with and connected to the third transfer tube.

[0029] Furthermore, the lower end surfaces of the first collection tube, the second collection tube and the third collection tube are respectively first inclined surfaces;

[0030] The upper end surfaces of the first through hole, the second through hole and the third through hole are second inclined surfaces that can be closely attached to the first inclined surface.

[0031] Furthermore, the lower end of the first transfer tube is connected to the first pressure sensor through a first connecting tube; the lower end of the second transfer tube is connected to the second pressure sensor through a second connecting tube; and the lower end of the third transfer tube is connected to the muscle force sensor through a third connecting tube.

[0032] Furthermore, a guide groove is provided on the inner wall of the perforation for guiding the first and second collection tubes into the perforation when the pressure difference measurement airway penetrates into the perforation, or for guiding the third collection tube into the perforation when the muscle strength measurement airway penetrates into the perforation;

[0033] The guide groove extends along the axial direction of the through hole, and the front end of the guide groove is open to allow the first collection tube and the second collection tube, or the third collection tube to enter the guide groove.

[0034] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0035] (1) The pulmonary function meter described in the embodiment of the present application uses a soft layer to connect and communicate the temporarily inserted pressure difference measurement airway / muscle strength measurement airway with other components inside the shell. When the pressure difference measurement airway / muscle strength measurement airway is inserted into the perforation on the shell, the soft layer will be squeezed, so that the pressure difference measurement airway or the muscle strength measurement airway will have an interference fit with the soft layer, and the pressure will become tighter and tighter. In this way, a close fit can be ensured, errors in the assembly and disassembly process can be reduced, and the overall assembly accuracy can be improved. The installation problem of the components can be effectively solved, the stability and accuracy of the mechanical parts during operation can be ensured, the running stability of the mechanical equipment can be improved, and the sealing effect can be significantly improved.

[0036] (2) The embodiment of the present application uses a sloped pressure-collecting pipe to connect with the soft layer, which has better sealing performance.

[0037] (3) The embodiment of the present application uses a decorative fixed rotating cover to seal the airway. The decorative fixed rotating cover uses a rotating lock to lock the seal, which can effectively improve the sealing effect of the airway. The friction coefficient is small, and the transmission efficiency of the rotating lock is higher, which can reduce energy loss and wear. The structural design is reasonable, the more it is pressed, the tighter it is, and it has higher mechanical properties and a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 The explosion of a part of the structure of a pulmonary function instrument in one embodiment of the present invention Figure 1 ;

[0040] Figure 2 It is a schematic diagram of the overall structure of a pulmonary function instrument when a pressure difference measurement airway is installed in one embodiment of the present invention;

[0041] Figure 3 A side view of a pulmonary function instrument in an embodiment of the present invention when a pressure difference measurement airway is installed;

[0042] Figure 4 A front view of a pulmonary function instrument in an embodiment of the present invention when a pressure difference measurement airway is installed;

[0043] Figure 5 It is a partial structural schematic diagram of a pulmonary function instrument when a pressure difference measurement airway is installed in one embodiment of the present invention;

[0044] Figure 6 A cross-sectional view of a pulmonary function instrument in an embodiment of the present invention when a pressure difference measurement airway is installed;

[0045] Figure 7 It is a partial structural schematic diagram of a pulmonary function instrument when a muscle strength measurement airway is installed in one embodiment of the present invention;

[0046] Figure 8 A cross-sectional view of a pulmonary function instrument in an embodiment of the present invention when a muscle strength measurement airway is installed;

[0047] Fig. 9 The explosion of a part of the structure of a pulmonary function instrument in one embodiment of the present invention Figure 2 . DETAILED DESCRIPTION

[0048] The embodiment of the present application provides a pulmonary function meter, which solves the technical problem that the pulmonary function meter in the prior art has poor stability and accuracy due to insufficient sealing between airway components.

[0049] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] like Figures 1 to 4 As shown, one or more embodiments of the present application provide a pulmonary function meter, which includes a shell, and the shell includes a rear cover 1 and a handle cover 2 that are snapped together. The rear cover 1 and the handle cover 2 are snapped together to form a whole and enclose an inner cavity of the shell, and the shell can protect the internal components.

[0051] like Figure 2As shown, based on the direction of the pulmonary function instrument in use, a through hole 29 is provided at the upper end of the shell, and the through hole 29 passes through the handle cover 2 and the rear cover 1 horizontally (i.e., in the front-to-back direction from the handle cover 2 to the rear cover 1), and the through hole 29 is used to penetrate the pressure difference measurement airway 3 or the muscle strength measurement airway 21.

[0052] like Figures 2 to 6 As shown, the differential pressure measuring airway 3 is in the shape of a hollow cylindrical tube. The differential pressure measuring airway 3 is used to detect the expiratory pressure difference and the inspiratory pressure difference. The differential pressure measuring airway 3 is connected at both ends along the front-to-back direction, and the front end forms a first exhalation port a1, and the rear end forms a first air outlet b1. The differential pressure measuring airway 3 is provided with a filter mesh 33 extending along its own cross section. The differential pressure measuring airway 3 is fixed with a first collection tube 10 and a second collection tube 23 on the front and rear sides of the filter mesh 33. The first collection tube 10 and the second collection tube 23 both extend along the radial direction of the differential pressure measuring airway 3, and the upper end of the first collection tube 10 is connected to the filter mesh 33. The pressure differential measuring airway 3 on the front side of the sheet 33 is connected, and the upper end of the second collection tube 23 is connected to the pressure differential measuring airway 3 on the rear side of the filter mesh 33, that is, the first collection tube 10 is adjacent to the first exhalation port a1, and the second collection tube 23 is adjacent to the first air outlet b1. The lower end of the first collection tube 10 is used to connect to the first connecting tube 11 described below, and the lower end of the second collection tube 23 is used to connect to the second connecting tube 34 described below. Since the filter mesh 33 is arranged in the pressure differential measuring airway 3, when the gas passes through the filter mesh 33, it is blocked by the filter mesh 33, and the gas will form a pressure difference on the front and back sides of the filter mesh 33.

[0053] like Figures 7-8 As shown, the muscle strength measurement airway 21 is in the shape of a hollow tube, and the muscle strength measurement airway 21 is used to detect the muscle strength value. Specifically, the inspiratory muscle strength refers to the maximum force that the inspiratory muscle can generate during the breathing process, and is one of the important indicators of respiratory muscle function. The muscle strength measurement airway 21 is connected at both ends along the front-to-back direction, and the front end forms a second exhalation port a2, and the rear end forms a second air outlet b2. The outer wall of the pressure difference measurement airway 3 is fixedly provided with a third collection tube 24 extending along its own radial direction. The upper end of the third collection tube 24 is connected to the muscle strength measurement airway 21, and the lower end is used to connect to the third connecting tube described below.

[0054] The housing (i.e., the inner cavity of the housing, the same below) is provided with an adapter seat 7, which can be fixed in the rear cover 1. For example, a frame is provided in the inner cavity of the housing, and the adapter seat 7 is mounted on the frame. The adapter seat 7 is provided with a first adapter tube 35, a third adapter tube 37, and a second adapter tube 36 which are vertically connected from front to back.

[0055] Wherein: the first collection tube 10 is connected to the upper end of the first transfer tube 35, and the lower end of the first transfer tube 35 is connected to the first pressure sensor 12 through the first connecting tube 11 to detect the gas pressure. The second collection tube 23 is connected to the upper end of the second transfer tube 36, and the lower end of the second transfer tube 36 is connected to the second pressure sensor through the second connecting tube 34 to detect the gas pressure. The third collection tube 24 is connected to the upper end of the third transfer tube 37, and the lower end of the third transfer tube 37 is connected to the muscle force sensor 22 through the third connecting tube to detect the muscle force. Wherein, the first pressure sensor 12, the second pressure sensor and the muscle force sensor 22 are respectively connected to the microprocessor 14, and the first pressure sensor 12, the second pressure sensor, the muscle force sensor 22 and the microprocessor 14 are all arranged in the inner cavity of the shell, and the microprocessor 14 receives and processes the data detected by the first pressure sensor 12, the second pressure sensor and the muscle force sensor 22, and calculates the expiratory pressure difference, the inspiratory pressure difference or the muscle force.

[0056] Of course, the first pressure sensor 12 and the second pressure sensor can be replaced by a differential pressure sensor. In this case, the first connecting tube 11 and the second connecting tube 34 are respectively connected to two detection ends of the same differential pressure sensor.

[0057] In addition, if Figure 5 , 7 As shown, the input end of the microprocessor 14 is electrically connected to the energy supply battery 13, the output end of the microprocessor 14 is fixedly connected to the wiring terminal 15, the front end of the wiring terminal 15 is fixedly connected to a plurality of control buttons 6, and the control button 6 is fixedly connected to the outer wall of the lower side of the handle cover 2, and the control button 6 can be used to control the microprocessor 14, the first pressure sensor 12, the second pressure sensor, the muscle force sensor 22 and other components to work or shut down. In addition, different control buttons 6 correspond to different detection functions and can be selected and used according to the required detection data. For example, in one embodiment of the present application, the control button 6 includes three, one of which is a pressure difference measurement button for controlling the first pressure sensor 12 and the second pressure sensor to work, another is a muscle force measurement button for controlling the muscle force sensor 22 to work, and another can be a switch button.

[0058] Further, such as Figure 2 , 4 As shown, a display screen 5 is fixedly connected to an outer wall of one side of the handle cover 2, and the display screen 5 is connected to the microprocessor 14 for visually displaying the calculation and analysis results of the microprocessor 14, so as to facilitate the user to obtain the detection information.

[0059] Therefore, when it is necessary to detect the expiratory pressure difference and / or the inspiratory pressure difference, the pressure difference measuring airway 3 is inserted into the perforation 29. When detecting the expiratory pressure difference, the user presses the pressure difference measuring button, and then blows air toward the first exhalation port a1. A part of the blown air passes through the first collection tube 10 and the first connecting tube 11 to the first pressure sensor 12, another part passes through the filter mesh 33 and then passes through the second collection tube 23 and the second connecting tube 34 to the second pressure sensor, and another part is directly discharged from the first air outlet b1. The first pressure sensor 12 and the second pressure sensor respectively send the acquired pressure data to the microprocessor 14, and the microprocessor 14 calculates the expiratory pressure difference according to the pressure data and displays it on the display screen 5. When detecting the inhalation pressure difference, the user inhales through the first exhalation port a1, and after the air enters the pressure difference measurement airway 3 through the first air outlet b1, a part of the air enters the user's body through the first exhalation port a1 for breathing, a part of the air passes through the second collection tube 23 and the second connecting tube 34 to the second pressure sensor, and a part of the air passes through the filter mesh 33 and then passes through the first collection tube 10 and the first connecting tube 11 to the first pressure sensor 12. The first pressure sensor 12 and the second pressure sensor respectively send the acquired pressure data to the microprocessor 14, and the microprocessor 14 calculates the inhalation pressure difference according to the pressure data and displays it on the display screen 5.

[0060] When muscle strength needs to be measured, the muscle strength measurement airway 21 is inserted into the perforation 29, the user presses the muscle strength measurement button, and blows air through the second exhalation port a2, a part of the exhaled air is discharged from the second air outlet b2, and the other part is led to the muscle strength sensor 22 through the third collection tube 24 and the third connecting tube. The muscle strength sensor 22 obtains the muscle strength data and transmits it to the microprocessor 14. The microprocessor 14 calculates the user's muscle strength based on the muscle strength data and displays it on the display screen 5.

[0061] Of course, it should be noted that after the pressure difference measurement airway 3 or the muscle strength measurement airway 21 is inserted into the perforation 29, the perforation 29 has a channel for the first collection tube 10, the second collection tube 23, or the third collection tube 24 to be inserted and extended into the shell.

[0062] In the above embodiment, the pressure difference measurement airway 3 and the muscle strength measurement airway 21 are temporarily assembled during use and are not fixedly arranged in the inner cavity of the shell. Therefore, it is necessary to ensure that the pressure difference measurement airway 3 or the muscle strength measurement airway 21 is fixed in the perforation 29.

[0063] like Figure 5 , 7As shown, the pressure difference measuring airway 3 and the muscle strength measuring airway 21 are coaxially provided with shoulders 30, 31, respectively, and the outer peripheral surfaces of the shoulders 30, 31 are provided with multiple (for example, not less than 3) locking jaws 8 along their own circumferential intervals, and a fixing groove can be correspondingly provided on the inner wall of the through-hole 29. After the pressure difference measuring airway 3 or the muscle strength measuring airway 21 is inserted into the through-hole 29, the locking jaw 8 is correspondingly inserted into the fixing groove, thereby realizing the fixation of the pressure difference measuring airway 3 or the muscle strength measuring airway 21 in the through-hole 29.

[0064] Specifically, the locking jaw 8 is a convex block protruding from the outer peripheral surface of the shaft shoulders 30 , 31 , and the front end surface 38 of the locking jaw 8 is an inclined surface to facilitate withdrawal from the through hole 29 .

[0065] In addition, when assembling the pressure difference measurement airway 3, it is necessary to ensure that the first collection tube 10 and the second collection tube 23 are aligned with the first adapter tube 35 and the second adapter tube 36 on the adapter seat 7, respectively, and to ensure the airtightness of the connection to avoid air leakage and affect the measurement accuracy. Similarly, when assembling the muscle strength measurement airway 21, it is necessary to ensure that the third collection tube 24 is aligned with the third adapter tube 37, and to ensure the tightness of the connection between the third collection tube 24 and the third adapter tube 37 to avoid air leakage and affect the measurement accuracy.

[0066] To this end, in one embodiment of the present application, Figure 1 , 9 As shown, the front end of the handle cover 2 is provided with an adapter column 19 sleeved outside the through hole 29, and the adapter column 19 can be integrally arranged with the handle cover 2 body, and the adapter column 19 is in the shape of a ring coaxially arranged with the through hole 29, and the outer peripheral wall of the front end of the adapter column 19 is provided with a plurality of connecting undercuts 20 (for example, no less than 3 connecting undercuts 20 can be provided) arranged in a circle around its own axial interval, and the connecting undercuts 20 protrude radially outward from the through hole 29, and the outer peripheral surface of the connecting undercut 20 is provided with a buckle 39 recessed radially inwardly. The pulmonary function instrument also includes a decorative fixed rotating cover 4 that can be fastened on the adapter column 19 to position the pressure difference measurement airway 3 or the muscle strength measurement airway 21 in the through hole 29.

[0067] like Figure 1 , 6 As shown in , 8 and 9, the decorative fixed rotating cover 4 is in a circular ring shape and can be coaxially mounted on the adapter column 19. The center of the decorative fixed rotating cover 4 and the center of the adapter column 19 can be passed through by the differential pressure measuring airway 3 or the muscle strength measuring airway 21.

[0068] The rear end surface of the decorative fixed rotating cover 4 is provided with an embedding groove 40 for the adapter column 19 and the connecting undercut 20 thereon to be embedded, and the rear end surface of the decorative fixed rotating cover 4 is provided with a limiting groove 17 corresponding to the connecting undercut 20, and a lock buckle 18 is provided in the limiting groove, and the lock buckle 18 protrudes radially toward the center. The embedding groove 40 is aligned with the adapter column 19 and the connecting undercut 20 thereon, so that the decorative fixed rotating cover 4 is rotated on the adapter column 19, and then the decorative fixed rotating cover 4 is continuously rotated relative to the handle cover 2, so that the connecting undercut 20 is respectively close to the corresponding limiting groove 17, until the clamping head of the lock buckle 18 in the limiting groove 17 is just aligned with the buckle 39 on the connecting undercut 20 in the radial direction and is clamped into the corresponding buckle 39, thereby realizing the fixing of the decorative fixed rotating cover 4 on the handle cover 2.

[0069] like Figure 1 , 5 As shown in Figures 8 to 9, a plurality of airway stoppers 16 are arranged in a circle on the inner wall of the decorative fixed rotating cover 4 along its own circumferential direction. Correspondingly, a step contact surface 32 is arranged on the inner wall of the rear end of the through hole 29.

[0070] After the pressure differential measuring airway 3 or the muscle strength measuring airway 21 is inserted into the through hole 29, the decorative fixed rotating cover 4 is then fixed on the adapter column 19, and the airway stop block 16 is abutted against the front end faces of the shaft shoulders 30, 31 by screwing the decorative fixed rotating cover 4 on the handle cover 2, and the rear end faces of the shaft shoulders 30, 31 are abutted against the step abutting surface 32, so that the pressure differential measuring airway 3 or the muscle strength measuring airway 21 is fixed between the step abutting surface 32 and the airway stop block 16, and the pressure differential measuring airway 3 or the muscle strength measuring airway 21 is positioned in the through hole 29. At this time, the first collection tube 10 on the pressure differential measuring airway 3 is aligned with the first connecting tube 11 and sealed and connected, and the second collection tube 23 is aligned with the second connecting tube 34 and sealed and connected; or the third collection tube 24 on the muscle strength measuring airway 21 is aligned with the third connecting tube and sealed and connected, ensuring the sealing of the airway connection.

[0071] In addition, the decorative fixed rotating cover uses a rotating lock to lock the seal, which can effectively improve the sealing effect of the airway. It has a small friction coefficient and a higher transmission efficiency of the rotating lock, which can reduce energy loss and wear. The structural design is reasonable, the more it is pressed, the tighter it becomes, and it has higher mechanical properties and a longer service life.

[0072] Furthermore, a soft layer 9 is provided on the surface of the adapter 7 facing the pressure difference measurement airway 3 and the muscle strength measurement airway 21. For example, the soft layer 9 can be a silicone pad, and the soft layer 9 is respectively provided with a first through hole 25 mounted on the first adapter tube 35, a second through hole 36 mounted on the second adapter tube 36, and a third through hole 27 mounted on the third adapter tube 37. When the soft layer 9 is not under pressure, the first through hole 25 is higher than the upper end of the first adapter tube 35, the second through hole 26 is higher than the upper end of the second adapter tube 36, and the third through hole 27 is higher than the upper end of the third adapter tube 37. In this way, after the pressure difference measurement airway 3 or the muscle strength measurement airway 21 is installed in place in the perforation 29, the first collection tube 10 and the second collection tube 23 will pass through the first through hole 25 and the second through hole 26 respectively and dock with the first transfer tube 35 and the second transfer tube 36; or, the third collection tube 24 will pass through the third through hole 27 and align with the third transfer tube 37 and connect. In this way, the soft layer 9 is squeezed, so that the first collection tube 10 and the second collection tube 23 on the pressure difference measurement airway 3 or the third collection tube 24 on the muscle strength measurement airway 21 are interference fit with the soft layer 9, and the more they are pressed, the tighter they are. In this way, a close fit can be ensured, errors in the assembly and disassembly process can be reduced, and the overall assembly accuracy can be improved. The installation problem of components can be effectively solved, the stability and accuracy of mechanical parts during operation can be ensured, the running stability of mechanical equipment can be improved, and the sealing effect can be significantly improved.

[0073] Specifically, the adapter 7 provides a foundation for installing the soft layer 9 and upward support.

[0074] Furthermore, the lower end faces of the first collection tube 10, the second collection tube 23 and the third collection tube 24 are first inclined surfaces (i.e., sloped), and correspondingly, the upper end faces of the first through hole 25, the second through hole 26 and the third through hole 27 are second inclined surfaces (i.e., sloped) that can be tightly attached to the first inclined surfaces. Compared with the interference fit between planes, the interference fit between inclined surfaces is easier to seal and avoid air leakage, thereby further enhancing the sealing of the connection.

[0075] It should be noted that the embodiment of the present application adopts a sloped pressure collection tube (i.e., the first collection tube 10, the second collection tube 23 and the third collection tube 24) to connect with the soft layer 9, and uses a decorative fixed rotating cover 4 to seal the airway. The rotary lock is used to lock the seal, which can effectively improve the sealing effect of the airway. The friction coefficient is small, and the transmission efficiency of the rotary lock is higher, which can reduce energy loss and wear. The structural design is reasonable, the more pressure is pressed, the tighter it is, and it has higher mechanical properties and a longer service life.

[0076] Furthermore, the first connecting tube 11, the second connecting tube 34 and the third connecting tube are all flexible tubes, and thus can be bent and arranged in the cavity of the shell.

[0077] The first pressure sensor 12 and the second pressure sensor are both the aforementioned pressure sensors.

[0078] Further, such as Figure 1 As shown, a guide groove 41 is provided on the inner wall of the through hole 29 for guiding the first collection tube 10 and the second collection tube 23 into the through hole 29 when the pressure difference measurement airway 3 penetrates into the through hole 29, or for guiding the third collection tube 24 into the through hole 29 when the muscle strength measurement airway 21 penetrates into the through hole 29. The guide groove 41 extends along the axial direction of the through hole 29, and the front end of the guide groove 41 is open to allow the first collection tube 10 and the second collection tube 23, or the third collection tube 24 to enter the guide groove 41.

[0079] It should be understood that although the terms "first", "second", etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are used only to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit without departing from the scope of the exemplary embodiments.

[0080] The directional terms such as outer, middle, inner, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0081] The above is only a preferred embodiment of the present application, and is not any formal or substantial limitation to the present application. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present application, and these improvements and supplements should also be regarded as the protection scope of the present invention. Any technician familiar with this profession, without departing from the spirit and scope of the present application, can make some changes, modifications and evolutions of the technical content disclosed above, which are equivalent embodiments of the present application; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the substantial technology of the present application are still within the scope of the technical solution of the present application.

Claims

1. A pulmonary function instrument, characterized in that: It comprises a shell, the shell is formed with a through hole, and the through hole can be penetrated to set a pressure difference measurement airway or a muscle strength measurement airway; A soft layer is also provided in the housing. When the pressure difference measuring airway is installed in the perforation, the pressure difference measuring airway presses the soft layer and communicates with the soft layer, so that it can be used to detect the expiratory pressure difference and / or the inspiratory pressure difference. When the muscle force measurement airway is installed in the perforation, the muscle force measurement airway compresses the soft layer and communicates with the soft layer, so as to be used for detecting muscle force.

2. A pulmonary function instrument as claimed in claim 1, characterized in that: A transfer seat is also provided in the shell, and the soft layer is provided on the transfer seat; When the pressure difference measuring airway or the muscle strength measuring airway is inserted into the perforation and in place, the pressure difference measuring airway or the muscle strength measuring airway squeezes the soft layer and communicates with the adapter through the soft layer.

3. A pulmonary function instrument as claimed in claim 2, characterized in that: The housing is also provided with a pressure sensor, a muscle force sensor and a microprocessor; When the pressure difference measuring airway is inserted into the perforation and in place, the pressure difference measuring airway is connected to the microprocessor via the soft layer, the adapter, and the pressure sensor, the pressure sensor acquires pressure data, and the microprocessor calculates the expiratory pressure difference and / or the inspiratory pressure difference according to the pressure data; When the muscle force measurement airway is inserted into the perforation and is in place, the muscle force measurement airway is connected to the microprocessor via the soft layer, the adapter, and the muscle force sensor, the muscle force sensor acquires muscle force data, and the microprocessor calculates the muscle force size based on the muscle force data.

4. A pulmonary function instrument as claimed in claim 1, characterized in that: The outer circumferences of the pressure difference measurement airway and the muscle strength measurement airway are both provided with locking clamps, and the inner walls of the perforations are correspondingly provided with fixing grooves; After the pressure difference measuring airway or the muscle strength measuring airway is inserted into the through hole, the locking jaw is clamped into the corresponding fixing groove, and the pressure difference measuring airway or the muscle strength measuring airway is positioned in the through hole.

5. A pulmonary function instrument as claimed in claim 1 or 4, characterized in that: The housing is provided with an adapter column, and the pulmonary function instrument further comprises a decorative fixed rotating cover that can be fastened on the adapter column; When the decorative fixed rotating cover is screwed onto the adapter post, the centers of the decorative fixed rotating cover and the adapter post can be passed through by the differential pressure measuring airway or the muscle strength measuring airway; at the same time, the decorative fixed rotating cover can limit the differential pressure measuring airway or the muscle strength measuring airway in the through hole.

6. A pulmonary function instrument as claimed in claim 5, characterized in that: A plurality of connection undercuts are arranged on the outer peripheral wall of the adapter column at axial intervals around the through hole; Limiting grooves are respectively arranged on the rear end surface of the decorative fixed rotating cover corresponding to the connecting undercuts, and locking buckles are arranged in the limiting grooves; When the decorative fixed rotating cover is screwed onto the adapter column, the connecting undercut is fixed with the lock buckle in the limiting groove.

7. A pulmonary function instrument as claimed in claim 5 or 6, characterized in that: The pressure difference measuring airway and the muscle strength measuring airway are respectively provided with shaft shoulders; the inner wall of the rear end of the perforation is provided with a step contact surface; the inner wall of the decorative fixed rotating cover is provided with an airway limit block; After the pressure difference measuring airway or the muscle strength measuring airway is inserted into the through hole, the decorative fixed rotating cover is fixed on the adapter column, the airway limit block is in contact with the front end surface of the shoulder, and the rear end surface of the shoulder is in contact with the step contact surface, and the pressure difference measuring airway or the muscle strength measuring airway is fixed between the step contact surface and the airway limit block.

8. A pulmonary function instrument as claimed in claim 3, characterized in that: A first collection tube and a second collection tube are respectively provided on one side outside the differential pressure measurement airway, both of which are connected and communicated with the differential pressure measurement airway. A filter mesh is provided in the differential pressure measurement airway, and the first collection tube and the second collection tube are respectively located at the front side and the rear side of the filter mesh; A third collection tube connected to and in communication with the muscle strength measurement airway is provided on one side outside the muscle strength measurement airway; The adapter seat is provided with a first adapter tube, a third adapter tube and a second adapter tube in sequence from front to back; The soft layer is respectively provided with a first through hole sleeved on the first transfer tube, a second through hole sleeved on the second transfer tube, and a third through hole sleeved on the third transfer tube; When the soft layer is not under pressure, the first through hole is higher than the upper end of the first transfer tube, the second through hole is higher than the upper end of the second transfer tube, and the third through hole is higher than the upper end of the third transfer tube; After the pressure difference measurement airway or the muscle strength measurement airway is installed in place in the perforation, the first collection tube and the second collection tube will pass through the first through hole and the second through hole respectively and be aligned with and connected to the first transfer tube and the second transfer tube respectively; or, the third collection tube will pass through the third through hole and be aligned with and connected to the third transfer tube.

9. A pulmonary function instrument as claimed in claim 8, characterized in that: The lower end surfaces of the first collection tube, the second collection tube and the third collection tube are respectively first inclined surfaces; The upper end surfaces of the first through hole, the second through hole and the third through hole are second inclined surfaces that can be closely attached to the first inclined surface.

10. A pulmonary function instrument as claimed in claim 8, characterized in that: The inner wall of the perforation is provided with a guide groove for guiding the first and second collection tubes into the perforation when the pressure difference measurement airway penetrates into the perforation, or for guiding the third collection tube into the perforation when the muscle strength measurement airway penetrates into the perforation; The guide groove extends along the axial direction of the through hole, and the front end of the guide groove is open to allow the first collection tube and the second collection tube, or the third collection tube to enter the guide groove.

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