Handheld pulmonary function instrument

Abstract

The utility model relates to the field of medical instruments, and provides a handheld pulmonary function instrument which comprises a shell, a lengthened sleeve, a connector assembly and an airflow pipeline. The lengthened sleeve is provided with a detection port, an air outlet and an air inlet; the connector assembly is provided with an air chamber, and the lengthened sleeve, the connector assembly and the airflow pipeline are communicated in sequence and form an air inlet channel; one end of the airflow pipeline away from the joint assembly is connected with the detection assembly. Air flow firstly enters from the detection port, then enters the air chamber through the air inlet, and then is guided into the detection assembly through the air flow pipeline. The air chamber can buffer airflow when entering the airflow pipeline, the air chamber can slow down airflow fluctuation even if the handheld pulmonary function instrument shakes, and when the handheld pulmonary function instrument is used, the air chamber is in a relatively closed state, the conditions of leakage and unstable air pressure can be effectively avoided, so that the air chamber can relieve the interference effect of external impact on the airflow, and the service life of the handheld pulmonary function instrument is prolonged. Therefore, the use stability of the handheld lung function instrument is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a handheld pulmonary function instrument. Background Art

[0002] Pulmonary function tests are a commonly used examination method in respiratory medicine. They are helpful for early detection and prevention of lung diseases, assessment of the severity of lung diseases, prediction and assessment of prognosis, and assessment of subject tolerance. They are widely used in clinical practice. With the gradual popularization of pulmonary function tests, miniaturized and handheld pulmonary function meters are increasingly used to more conveniently monitor the progression of lung diseases and diversify testing scenarios.

[0003] The characteristics of handheld pulmonary function devices are that they are small, portable, convenient and fast, and the testing scenarios are relatively flexible, which greatly facilitates users. However, it also leads to the fact that the testing equipment is not fixed during the test. Therefore, how to improve the stability of the structure and internal air pressure of handheld pulmonary function products during use is a key issue that needs to be solved at present. Utility Model Content

[0004] The utility model provides a handheld pulmonary function meter, which is used to solve the problems of insufficient structure and internal air pressure stability of the handheld pulmonary function meter in the prior art during use.

[0005] The utility model provides a handheld pulmonary function instrument, comprising: a shell, an extended sleeve, a joint assembly and an airflow pipeline;

[0006] The extended sleeve is arranged on the shell, an installation space is arranged in the shell, and the joint assembly and the air flow duct are arranged in the installation space;

[0007] The extended sleeve is provided with a detection port, an air outlet and an air inlet, wherein the detection port is provided at one end of the extended sleeve, the air outlet is provided at the other end of the extended sleeve, and the air inlet is provided at the side wall of the extended sleeve;

[0008] The joint assembly is provided with an air chamber, the extension sleeve is connected to the air chamber through the air inlet, and the air chamber is connected to the air flow duct, so that the extension sleeve, the joint assembly and the air flow duct are connected in sequence to form an air inlet channel; the end of the air flow duct away from the joint assembly is used to connect the detection assembly.

[0009] According to a handheld pulmonary function meter provided by the utility model, the extended sleeve comprises: an outer sleeve and an inner sleeve, at least part of the inner sleeve is inserted into one end of the outer sleeve; the outer sleeve is detachably connected to the inner sleeve;

[0010] The end of the inner sleeve away from the outer sleeve is formed as the detection port; the air inlet is arranged on the side wall of the outer sleeve and the inner sleeve on the side close to the joint assembly; wherein a screen is also arranged in the extended sleeve;

[0011] The joint assembly comprises: a first joint assembly and a second joint assembly, wherein the first joint assembly and the second joint assembly are arranged in the installation space at intervals along the axial direction of the extension sleeve;

[0012] The screen is arranged between the first joint assembly and the second joint assembly.

[0013] According to a handheld pulmonary function meter provided by the utility model, the shell includes a handheld part and a support part, the support part is arranged above the handheld part, the extended sleeve is arranged on the support part, and the installation space is arranged in the handheld part.

[0014] According to a handheld pulmonary function meter provided by the utility model, the air inlet includes: a first air inlet and a second air inlet; the first air inlet is arranged on a side of the extended sleeve close to the first joint assembly, and the second air inlet is arranged on a side of the extended sleeve close to the second joint assembly; the first air inlet is connected to the first joint assembly, and the second air inlet is connected to the second joint assembly.

[0015] According to a handheld pulmonary function meter provided by the utility model, the joint assembly comprises: a ventilation joint, a joint sleeve and the air chamber;

[0016] The tail end of the vent joint is provided with a first connection portion, and the first connection portion is arranged through the air inlet; the circumferential side of the vent joint is also provided with a first extension portion, and the first extension portion is arranged between the first connection portion and the top end of the vent joint;

[0017] The joint sleeve has a second extension portion at one end close to the vent joint, and the first extension portion abuts against the second extension portion; a receiving space is provided inside the joint sleeve, and the top end of the vent joint is provided in the receiving space; the joint sleeve has a second connection portion at one end away from the first extension portion, and the second connection portion is connected to the airflow duct;

[0018] The air chamber is formed at the top of the vent joint, the bottom of the joint sleeve and the inner wall of the joint sleeve.

[0019] According to a handheld pulmonary function meter provided by the utility model, the ventilation joint is provided with a first air intake passage, the joint sleeve is provided with a second air intake passage, the first air intake passage and the second air intake passage are coaxially arranged; the air chamber is arranged between the first air intake passage and the second air intake passage.

[0020] According to a handheld pulmonary function meter provided by the utility model, a sealing partition is provided between the handheld part and the supporting part, and the handheld part and the sealing partition form the installation space;

[0021] The extended sleeve and the sealing baffle are spaced apart along the extending direction of the handheld portion, and the joint assembly is passed through the sealing baffle.

[0022] According to a handheld pulmonary function meter provided by the utility model, the elongated sleeve is connected to the support portion through a buckle and a slot, and the elongated sleeve is adapted to the shape of the support portion.

[0023] According to a handheld pulmonary function meter provided by the utility model, the sealing baffle comprises: an upper plate and a lower plate, a first convex stopper is provided on a side of the upper plate close to the lower plate, a first concave stopper is provided on a side of the lower plate close to the upper plate, and the first convex stopper is adapted to the first concave stopper;

[0024] The handheld part comprises: a front shell and a rear shell, wherein the front shell and the rear shell enclose the installation space;

[0025] A second convex stop is provided on the circumferential side of the front shell, and a second concave stop is provided on the circumferential side of the rear shell, and the second convex stop is adapted to the second concave stop.

[0026] According to a handheld pulmonary function meter provided by the utility model, a power supply rack is provided in the installation space, the power supply rack is hollowed out, and a battery assembly is provided in the power supply rack;

[0027] Wherein, a limiting portion is provided on the outer side of the power supply rack, and the airflow duct is embedded in the limiting portion.

[0028] The handheld pulmonary function meter provided by the utility model has an airflow that first enters from the detection port, then enters the air chamber through the air inlet, and then is introduced into the detection component through the airflow duct. The air chamber can buffer the airflow when it enters the airflow duct. Even if the handheld pulmonary function meter shakes, the air chamber can slow down the airflow fluctuation. When in use, the air chamber is in a relatively closed state, which can effectively avoid leakage and unstable air pressure. Therefore, the air chamber can alleviate the interference of external impact on the airflow, thereby increasing the stability of the handheld pulmonary function meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is one of the structural schematic diagrams of the handheld pulmonary function instrument provided by the utility model;

[0031] Figure 2 This is the second structural schematic diagram of the handheld pulmonary function instrument provided by the utility model;

[0032] Figure 3 It is an exploded schematic diagram of the handheld pulmonary function instrument provided by the utility model;

[0033] Figure 4 This is one of the cross-sectional views of the handheld pulmonary function instrument provided by the utility model;

[0034] Figure 5 The utility model provides Figure 4 A partial enlarged schematic diagram of the middle A part;

[0035] Figure 6 This is the second cross-sectional view of the handheld pulmonary function instrument provided by the utility model;

[0036] Figure 7 It is a partial cross-sectional view of the support portion provided by the utility model;

[0037] Figure 8 It is a structural schematic diagram of the outer sleeve provided by the utility model;

[0038] Fig. 9 This is one of the partial cross-sectional views of the handheld pulmonary function instrument provided by the utility model;

[0039] Fig.10 It is a structural schematic diagram of the battery rack provided by the utility model;

[0040] Fig.11 It is a schematic diagram of the structure of the probe provided by the utility model;

[0041] Fig.12 It is a structural schematic diagram of the plug provided by the utility model;

[0042] Fig.13 This is one of the structural schematic diagrams of the socket provided by the utility model;

[0043] Fig.14 It is a structural schematic diagram of the needle cavity provided by the utility model;

[0044] Fig.15 This is the second structural schematic diagram of the socket provided by the utility model;

[0045] Fig.16 It is a structural schematic diagram of the key provided by the utility model;

[0046] Fig.17 It is a schematic diagram of the bottom structure of the handheld pulmonary function instrument provided by the utility model;

[0047] Fig.18 This is the second partial cross-sectional view of the handheld pulmonary function instrument provided by the utility model.

[0048] Reference numerals:

[0049] 100, housing; 110, hand-held part; 111, installation space; 112, front housing; 1121, second convex stopper; 113, rear housing; 1131, second concave stopper; 120, support part; 121, support space; 122, buckle; 130, sealing partition; 131, upper plate; 132, lower plate; 140, display screen; 150, button; 160, protective foam;

[0050] 200, extended sleeve; 210, detection port; 220, outer sleeve; 221, slot; 230, inner sleeve; 231, screen; 232, first part; 233, second part;

[0051] 300, joint assembly; 301, first joint assembly; 302, second joint assembly; 310, air chamber; 320, ventilation joint; 321, first air inlet passage; 322, first connecting portion; 323, first extension portion; 330, joint sleeve; 331, second air inlet passage; 332, second extension portion; 333, second connecting portion; 340, sealing ring;

[0052] 410, a first airflow duct; 420, a second airflow duct;

[0053] 500, detection component;

[0054] 600, power supply rack; 610, battery assembly; 620, limiter;

[0055] 701, socket; 702, plug; 710, probe; 711, protrusion; 712, groove; 720, needle cavity; 730, positioning groove; 740, vent; 750, data line;

[0056] 810. Waterproof rubber plug; 820. Screw rubber plug. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are 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.

[0058] The term "first" or "second" in the specification and claims of the present invention may include one or more of the features explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects.

[0059] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "bottom" and "head end" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "assembly", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The spirometer based on differential pressure sensing has high sensitivity and volatility, so the more stable it is during use, the more accurate the test results will be. However, handheld spirometers need to be used on the move, so it is difficult to ensure the stability of the structure and internal air pressure of the handheld spirometer, which affects the test results.

[0062] In order to solve the above problems, Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the handheld pulmonary function meter of the embodiment of the utility model comprises: a housing 100, an extension sleeve 200, a joint assembly 300 and an airflow duct; the extension sleeve 200 is arranged on the housing 100, an installation space 111 is arranged in the housing 100, and the joint assembly 300 and the airflow duct are arranged in the installation space 111. The extension sleeve 200 is provided with a detection port 210, an air outlet and an air inlet, the detection port 210 is arranged at one end of the extension sleeve 200, the air outlet is arranged at the other end of the extension sleeve 200, and the air inlet is arranged on the side wall of the extension sleeve 200.

[0063] Specifically, the detection port 210 is used for the user to blow air. In order to improve the hygiene and safety of the handheld spirometer during use, the detection port 210 can be equipped with a disposable mouthpiece for use. The air inlet is arranged on the side wall of the extended sleeve 200 and is close to the handheld part 110, so that the internal structure of the handheld spirometer is more closed.

[0064] In actual use, if the internal environment of the handheld spirometer is not sealed enough, it will cause unstable air pressure, which will affect the accuracy of the test and make the use of the handheld spirometer unstable.

[0065] To solve the above problems, the joint assembly 300 is provided with an air chamber 310, the extended sleeve 200 is connected to the air chamber 310 through the air inlet, and the air chamber 310 is connected to the air flow duct, so that the extended sleeve 200, the joint assembly 300 and the air flow duct are connected in sequence to form an air inlet channel; the end of the air flow duct away from the joint assembly 300 is used to connect the detection assembly 500.

[0066] Specifically, when the user blows air into the detection port 210, the airflow enters the extension sleeve 200 from the detection port 210, and then enters the airflow pipeline through the air chamber 310, and the tail end of the airflow pipeline is connected to the detection component 500, so the air inlet channel forms a relatively sealed environment, thereby preventing airflow leakage, increasing the stability of air pressure, and thus improving the accuracy of the detection result. In addition, since the air chamber 310 has a large space, it can buffer the airflow, further improving the stability of the airflow inside the handheld spirometer.

[0067] It is understandable that when the airflow is introduced into the air chamber 310 from the detection port 210, the airflow that enters first can be buffered to a certain extent in the air chamber 310, and the buffered airflow then enters the airflow duct. Because the volume of the air chamber 310 is relatively large, the airflow duct can further reduce the fluctuation of the airflow, thereby improving the accuracy of the handheld spirometer detection. That is, the airflow is connected in sequence through the air inlet and the air chamber 310, and the air inlet channel formed by the extended sleeve 200, the air chamber 310, and the airflow duct is finally introduced into the detection component 500. Compared with the setting method on the market where the airflow duct is directly connected to the air inlet, the structure with the joint component 300 is more stable. Among them, the detection component 500 can be a temperature and humidity sensor, a differential pressure sensor, an atmospheric pressure sensor, etc.

[0068] In addition, the handheld pulmonary function meter also has a real-time data transmission function, which can be uploaded to a terminal, such as a computer, host, etc., through a wireless network, or the data can be transmitted to the terminal through a data cable 750 connection method, but the traditional data cable 750 connection method has the problem of loose connection and easy to fall off.

[0069] like Figure 2 , Fig.11 , Fig.12 , Fig.13 , Fig.14 and Fig.15 As shown, in order to solve the above problems, the embodiment of the utility model is also provided with a connection assembly, which includes: a socket 701, a plug 702, a probe 710 and a needle cavity 720; the probe 710 is arranged in the socket 701, and the needle cavity 720 is arranged in the plug 702.

[0070] Exemplarily, the probe 710 and the needle cavity 720 can be made of brass, the overall length of the probe 710 can be 16.8 mm, and the length of the needle cavity 720 can be 13.5 mm, which increases the contact area between the probe 710 and the needle cavity 720, thereby improving the stability of the connection. The needle cavity 720 is directly injection molded in the plug 702, and the plug-in is stable and safe. The opening where the needle cavity 720 connects to the probe 710 has a certain elasticity. When the probe 710 is inserted into the needle cavity 720, the opening of the needle cavity 720 will expand. Because the opening is elastic, the needle cavity 720 can tightly wrap the probe 710, thereby further improving the reliability of the connection between the probe 710 and the needle cavity 720.

[0071] The plug 702 is provided with a protrusion 711, and the socket 701 is provided with a groove 712, so that the plug 702 can be firmly fixed in the socket 701. In addition, the connection between the socket 701 and the plug 702 also has a positioning groove 730 and a protrusion 711, a small hole and a bump structure, so that the connection is tighter. When the socket 701 and the plug 702 are connected, they are positioned by the positioning groove 730, so that the plugging of the socket 701 and the plug 702 is more accurate. This connection method is stable and strong, and can withstand great force dragging and shaking, so that the handheld spirometer is not easy to disconnect when connected in real time, avoiding the situation where the data line 750 falls off during the use of the handheld spirometer, resulting in invalid testing.

[0072] In the embodiment of the utility model, the airflow first enters from the detection port 210, then enters the air chamber 310 through the air inlet, and then is introduced into the detection component 500 through the airflow duct. The air chamber 310 can buffer the airflow when it enters the airflow duct. Even if the handheld spirometer shakes, the air chamber 310 can slow down the airflow fluctuation. When in use, the air chamber 310 is in a relatively closed state, which can effectively avoid leakage and unstable air pressure. Therefore, the air chamber 310 can alleviate the interference of external impact on the airflow, thereby increasing the stability of the handheld spirometer.

[0073] In an optional embodiment, if Figure 1 and Figure 3 As shown, the housing 100 includes a hand-held portion 110 and a support portion 120 . The support portion 120 is disposed above the hand-held portion 110 . The extended sleeve 200 is disposed on the support portion 120 . An installation space 111 is disposed in the hand-held portion 110 .

[0074] In order to facilitate the user to better hold the handheld spirometer, an anti-slip layer can be provided on the handheld portion 110 to prevent the handheld spirometer from slipping from the user's hand, thereby affecting the test. Secondly, a display screen 140 and a button 150 can also be provided on the handheld portion 110 to facilitate the setting of various functions of the handheld spirometer, and the test results can be viewed through the display screen 140, thereby improving the convenience of using the handheld spirometer.

[0075] Among them, Figure 7 As shown, the support portion 120 is provided with a support space 121 adapted to the extended sleeve 200 . For example, when the extended sleeve 200 is cylindrical, the support space 121 is cylindrical.

[0076] In an optional embodiment, if Figure 2 and Figure 3 As shown, the extended sleeve 200 includes: an outer sleeve 220 and an inner sleeve 230, at least a portion of the inner sleeve 230 is inserted into one end of the outer sleeve 220; the outer sleeve 220 and the inner sleeve 230 are detachably connected.

[0077] The end of the inner sleeve 230 away from the outer sleeve 220 is formed as a detection port 210; the air inlet is arranged on the side wall of the outer sleeve 220 and the inner sleeve 230 near the joint assembly 300; wherein a screen 231 is also arranged in the inner sleeve 230. The screen 231 is arranged between the detection port 210 and the air outlet.

[0078] Specifically, the outer sleeve 220 is used to fix the inner sleeve 230, and the detection port 210 is actually arranged at the head end of the inner sleeve 230. In order to facilitate the user to blow air into the detection port 210, the length of the inner sleeve 230 can be greater than the length of the outer sleeve 220. The inner sleeve 230 is sleeved in the outer sleeve 220, which can prevent the inner sleeve 230 from breaking from the outer sleeve 220 when the handheld spirometer falls, thereby enhancing the reliability of the structure. In order to further improve the airtightness between the outer sleeve 220 and the inner sleeve 230, a sealing member can be arranged on the outer wall of the inner sleeve 230.

[0079] like Figure 6 As shown, the joint assembly 300 includes: a first joint assembly 301 and a second joint assembly 302, which are arranged in the installation space 111 along the axial direction of the extension sleeve 200. The screen 231 is arranged between the first joint assembly 301 and the second joint assembly 302.

[0080] When the handheld pulmonary function meter adopts a differential pressure measurement method, the detection component 500 may be provided with a differential pressure sensor, and the tail end of the airflow pipeline is connected to the differential pressure sensor. In order to obtain the differential pressure value of the detected airflow, the handheld pulmonary function meter is provided with a first joint component 301 and a second joint component 302, and a screen 231 is provided in the inner sleeve 230. In order to facilitate monitoring of the differential pressure of the airflow, the screen 231 is provided between the first joint component 301 and the second joint component 302.

[0081] For example, Figure 6 As shown, the first joint assembly 301 is connected to the head end of the first airflow duct 410, and the second joint assembly 302 is connected to the head end of the second airflow duct 420, wherein the tail ends of the first airflow duct 410 and the second airflow duct 420 are both connected to the differential pressure sensor.

[0082] Specifically, when the detection airflow enters from the detection port 210, a part of the airflow flows directly from the inner sleeve 230 into the first joint assembly 301, and then flows into the first airflow duct 410. At this time, the pressure difference sensor obtains a first set of pressure data for the detection airflow from the first airflow duct 410; another part of the airflow passes through the screen 231, flows into the second joint assembly 302, and then flows into the second airflow duct 420. At this time, the pressure difference sensor obtains a second set of pressure data for the detection airflow from the second airflow duct 420. The pressure difference sensor calculates the pressure difference based on the first set of pressure data and the second set of pressure data. After the pressure difference data passes through the internal algorithm, the lung function test results are obtained, and the test results are displayed on the display screen 140 or other terminal devices.

[0083] In addition, if Figure 2 and Figure 3 As shown, in order to facilitate cleaning of the inner sleeve 230 and the screen 231, the inner sleeve 230 can be pulled out from the outer sleeve 220, and the inner sleeve 230 can be provided with a first part 232 and a second part 233, the first part 232 and the second part 233 are connected by a spiral connection, and the screen 231 is arranged at the connection between the first part 232 and the second part 233, therefore, the screen 231 can be conveniently cleaned by only unscrewing the first part 232 and the second part 233.

[0084] In an optional embodiment, if Figure 1 and Figure 3 As shown, the housing 100 includes a hand-held portion 110 and a support portion 120 . The support portion 120 is disposed above the hand-held portion 110 . The extended sleeve 200 is disposed on the support portion 120 . An installation space 111 is disposed in the hand-held portion 110 .

[0085] In order to facilitate the user to better hold the handheld spirometer, an anti-slip layer can be provided on the handheld portion 110 to prevent the handheld spirometer from slipping from the user's hand, thereby affecting the test. Secondly, a display screen 140 and a button 150 can also be provided on the handheld portion 110 to facilitate the setting of various functions of the handheld spirometer, and the test results can be viewed through the display screen 140, thereby improving the convenience of using the handheld spirometer.

[0086] Among them, Figure 7 As shown, the support portion 120 is provided with a support space 121 adapted to the extended sleeve 200 . For example, when the extended sleeve 200 is cylindrical, the support space 121 is cylindrical.

[0087] In an optional embodiment, the air inlet includes: a first air inlet and a second air inlet; the first air inlet is arranged on a side of the extended sleeve 200 close to the first joint assembly 301, and the second air inlet is arranged on a side of the extended sleeve 200 close to the second joint assembly 302; the first air inlet is connected to the first joint assembly 301, and the second air inlet is connected to the second joint assembly 302.

[0088] Among them, because the inner sleeve 230 is sleeved in the outer sleeve 220 , in order to allow the airflow to enter the air chamber 310 from the detection port 210 , the first air inlet and the second air inlet penetrate the outer sleeve 220 and the inner sleeve 230 .

[0089] Specifically, when the detection airflow enters from the detection port 210, a part of the airflow flows into the first joint assembly 301 through the first air inlet, and then flows into the first airflow duct 410. At this time, the pressure difference sensor obtains a first set of pressure data for the detection airflow from the first airflow duct 410; another part of the airflow passes through the screen 231, flows into the second joint assembly 302 through the second air inlet, and then flows into the second airflow duct 420. At this time, the pressure difference sensor obtains a second set of pressure data for the detection airflow from the second airflow duct 420, and then the pressure difference sensor obtains its pressure difference. After the pressure difference data is processed by the internal algorithm, the lung function test result is obtained.

[0090] In an optional embodiment, if Figure 5 As shown, the joint assembly 300 includes a vent joint 320 , a joint sleeve 330 and an air chamber 310 .

[0091] A first connection portion 322 is provided at the tail end of the ventilation joint 320, and the first connection portion 322 is inserted into the air inlet; a first extension portion 323 is also provided on the circumferential side of the ventilation joint 320, and the first extension portion 323 is provided between the first connection portion 322 and the top end of the ventilation joint 320; a second extension portion 332 is provided at one end of the joint sleeve 330 close to the ventilation joint 320, and the first extension portion 323 abuts against the second extension portion 332; an accommodating space is provided inside the joint sleeve 330, and the top end of the ventilation joint 320 is provided in the accommodating space; a second connection portion 333 is provided at one end of the joint sleeve 330 away from the first extension portion 323, and the second connection portion 333 is connected to the airflow duct.

[0092] The top of the vent joint 320, the bottom of the joint sleeve 330 and the inner wall of the joint sleeve 330 form an air chamber 310. That is, the volume of the air chamber 310 can be determined by the distance between the vent joint 320 and the bottom of the joint sleeve 330. The closer the vent joint 320 is to the bottom of the joint sleeve 330, the smaller the volume of the air chamber 310; the farther the vent joint 320 is from the bottom of the joint sleeve 330, the larger the volume of the air chamber 310.

[0093] It should be noted that, in order to avoid the airflow leakage caused by the gap between the vent joint 320 and the joint sleeve 330, the shapes of the vent joint 320 and the joint sleeve 330 are adapted, for example, the vent joint 320 is similar to a "convex" shape, and the joint sleeve 330 is a "concave" shape. From the top of the vent joint 320 to the first extension part 323, its side wall is tightly fitted with the inner wall of the accommodating space of the joint sleeve 330. In addition, the vent joint 320 is also provided with a sealing ring 340, which is close to the first connecting part 322 and the second connecting part 333 and fits with the inner wall of the joint sleeve 330.

[0094] Specifically, the first connection part 322 of the ventilation joint 320 is used to connect to the air inlet. In order to disassemble the ventilation joint 320, the first connection part 322 is detachably connected to the air inlet. For example, the outer side of the first connection part 322 is provided with a thread, the air inlet is provided with a thread groove, and a seal is added at the connection between them to improve the sealing of the structure; similarly, the second connection part 333 of the joint sleeve 330 is detachably connected to the airflow duct. Since the airflow duct itself has a certain elasticity, the second connection part 333 can be sleeved in the airflow duct to avoid airflow leakage.

[0095] In an optional embodiment, if Figure 5 As shown, the ventilation joint 320 is provided with a first air intake passage 321 , the joint sleeve 330 is provided with a second air intake passage 331 , and the first air intake passage 321 and the second air intake passage 331 are coaxially arranged; the air chamber 310 is arranged between the first air intake passage 321 and the second air intake passage 331 .

[0096] In order to allow the airflow to smoothly flow from the first air intake passage 321 into the air chamber 310, and then flow from the air chamber 310 into the second air intake passage 331, the first air intake passage 321 and the second air intake passage 331 are coaxially arranged. In order to further improve the sealing performance of the structure, the second air intake passage 331 is partially arranged inside the airflow duct to prevent airflow leakage.

[0097] In addition, in order to enable the air chamber 310 to buffer the airflow entering from the first air intake passage 321, the diameter of the first air intake passage 321 can be larger than the diameter of the air inlet; in order to maintain the stability of the air pressure and avoid leakage of the airflow when the airflow enters the airflow duct from the second air intake passage 331, the diameter of the second air intake passage 331 can be smaller than the diameter of the airflow duct.

[0098] In an optional embodiment, if Figure 7As shown, a sealing partition 130 is provided between the handheld portion 110 and the support portion 120, and an installation space 111 is formed between the handheld portion 110 and the sealing partition 130. The extension sleeve 200 and the sealing partition 130 are spaced apart along the extending direction of the handheld portion 110, and the joint assembly 300 is penetrated through the sealing partition 130.

[0099] Specifically, the sealing baffle 130 is disposed between the bottom of the extension sleeve 200 and the support portion 120. The sealing baffle 130 can increase the airtightness inside the handheld spirometer and can play a certain waterproof role. For example, when cleaning the handheld spirometer, the sealing baffle 130 can prevent splashing, that is, prevent liquid and stains from entering the installation space 111, thereby increasing the service life of the handheld spirometer.

[0100] Since the first joint assembly 301 and the second joint assembly 302 are connected to the first air inlet and the second air inlet respectively, in the case of the sealing baffle 130, the first joint assembly 301 and the second joint assembly 302 are arranged in the sealing baffle 130 at intervals along the axial direction of the extension sleeve 200. In other words, the vent joint 320 is partially arranged on one side of the sealing baffle 130 close to the first air inlet and the second air inlet, and the joint sleeve 330 is arranged on the other side of the sealing baffle 130. Among them, the outer surface of the joint assembly 300 is adapted to the sealing baffle 130, and a sealant can be used to fill the gap between the joint assembly 300 and the sealing baffle 130 to improve the sealing effect.

[0101] The sealing baffle 130 may be of an integrated design, which can improve the reliability of the structure; or the sealing baffle 130 may be spliced ​​together for easy disassembly.

[0102] In an optional embodiment, if Figure 7 and Figure 8 As shown, the extension sleeve 200 is connected to the support portion 120 via a buckle 122 and a slot 221 , and the shapes of the extension sleeve 200 and the support portion 120 are adapted.

[0103] Illustratively, a buckle 122 can be provided on the outer wall of the outer sleeve 220, and a slot 221 can be provided on the inner side of the support portion 120. The buckle 122 can be rotated into the slot 221 and locked with each other, thereby increasing the reliability of the structure and avoiding the outer sleeve 220 and the support portion 120 from being separated when the handheld spirometer falls. At the same time, when the handheld spirometer is finished using, the inner sleeve 230 needs to be pulled out of the outer sleeve 220 for cleaning. After the inner sleeve 230 is cleaned, the inner sleeve 230 needs to be inserted into the outer sleeve 220 again. Therefore, the structure of the buckle 122 and the slot 221 can also avoid the outer sleeve 220 from twisting or loosening when the inner sleeve 230 is pulled out of the outer sleeve 220, thereby further increasing the stability of the connection between the outer sleeve 220 and the support portion 120.

[0104] In order to further increase the reliability of the handheld spirometer structure, the shape of the extension sleeve 200 is adapted to the shape of the support portion 120. For example, when the extension sleeve 200 is cylindrical, the shape of the support portion 120 can be an arc shape that matches it. The larger the curvature of the arc, the larger the contact area between the support portion 120 and the extension sleeve 200, and the more stable the connection between the support portion 120 and the extension sleeve 200.

[0105] In addition, in the case of a sealing baffle 130, the ventilation joint 320 is partially arranged on one side of the sealing baffle 130 close to the air inlet, and the joint sleeve 330 is arranged on the other side of the sealing baffle 130. The air inlet is arranged in the extension sleeve 200, so the extension sleeve 200 can also be connected to the support part 120 through the joint assembly 300. That is, the extension sleeve 200 increases the reliability of the connection with the support part 120 through the buckle 122, the slot 221 and the joint assembly 300.

[0106] In an optional embodiment, if Fig. 9 As shown, when the sealing partition 130 is spliced, the sealing partition 130 includes: an upper plate 131 and a lower plate 132, a first convex stopper is provided on a side of the upper plate 131 close to the lower plate 132, and a first concave stopper is provided on a side of the lower plate 132 close to the upper plate 131, and the first convex stopper is matched with the first concave stopper. That is, the sealing partition 130 adopts a stopper structure, which increases the waterproof performance of the sealing partition 130.

[0107] like Figure 1 , Figure 3 and Fig.17 As shown, the handheld part 110 includes: a front shell 112 and a rear shell 113, which enclose an installation space 111; a second convex stop 1121 is provided on the circumferential side of the front shell 112, and a second concave stop 1131 is provided on the circumferential side of the rear shell 113, and the second convex stop 1121 and the second concave stop 1131 are adapted to each other.

[0108] The handheld part 110 is provided with a front shell 112 and a rear shell 113, so that the handheld part 110 can be easily disassembled and repaired. In order to prevent liquid from entering the inside of the handheld part 110 during use of the handheld spirometer, a second convex stopper 1121 is provided on the circumference of the front shell 112, and a second concave stopper 1131 is provided on the circumference of the rear shell 113. That is, the handheld part 110 also adopts a stopper structure to improve the overall waterproof performance of the handheld spirometer.

[0109] like Fig.18 As shown, the vent hole 740 is arranged at the bottom of the handheld part 110 near the detection component 500. In order to prevent external impurities from entering the vent hole 740, a waterproof film is used at the vent hole 740 for waterproofing. Therefore, when the detection component 500 is provided with a temperature sensor, a humidity sensor and an atmospheric pressure sensor, the waterproof film is only breathable but not water-permeable, which is convenient for monitoring the temperature sensor, the humidity sensor and the atmospheric pressure sensor.

[0110] In addition, in order to further enhance the waterproof performance of the handheld spirometer, Figure 3 As shown, a protective foam 160 is provided behind the display screen 140 and is bonded to the handheld part 110 with 3M glue for waterproofing; Figure 3 and Fig.16 As shown, the button 150 can be made of soft rubber material, and when the button 150 is pressed, compression deformation and waterproofing are generated. In addition, a waterproof rubber plug 810 is provided at the connection hole of the data line 750. The waterproof rubber plug 810 adopts soft rubber interference waterproofing to improve the waterproof effect. A waterproof film is also used at the sound hole of the speaker to prevent external liquids or dust and other debris from entering the installation space 111. In addition, as Figure 6 and Fig.18 As shown, a plurality of screw plugs 820 are further provided on the rear shell 113 to improve the waterproof performance of the rear shell 113 and further improve the service life of the handheld spirometer.

[0111] In an optional embodiment, if Figure 4 and Fig.10 As shown, a power supply rack 600 is provided in the installation space 111 . The power supply rack 600 is hollowed out, and a battery assembly 610 is provided in the power supply rack 600 .

[0112] A limiting portion 620 is disposed on the outer side of the power supply rack 600, and the airflow duct is embedded in the limiting portion 620. The limiting portion 620 may be a limiting groove or a limiting hole.

[0113] Specifically, when the battery assembly 610 is provided, the handheld pulmonary function meter can be portable and more convenient for users to use. The middle part of the power supply rack 600 is hollowed out, which is conducive to the heat dissipation of the battery assembly 610 and also convenient for viewing the information label of the battery assembly 610. Elastic foam bonding is also provided between the two ends of the power supply rack 600 and the battery assembly 610. The power supply rack 600 can be fixed in the installation space 111 by screws, ensuring the stability of the battery assembly 610.

[0114] Since the volume of the battery assembly 610 is relatively large compared to other components in the installation space 111 and occupies more space, the airflow duct has less space available. In order not to affect the flow of air in the airflow duct, a limiter 620 is provided on the outside of the power supply rack 600 to provide space for the airflow duct. The airflow duct is embedded in the limiter 620 to ensure that the airflow duct is smooth, so that the battery assembly 610 and the airflow duct will not squeeze each other, which is conducive to the passage of airflow. Such a setting not only fixes the airflow duct, but also effectively alleviates the airflow fluctuation caused by the shaking of the handheld spirometer.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A handheld pulmonary function meter, characterized in that: include: Housing, extension sleeve, connector assembly and air flow duct; The extended sleeve is arranged on the shell, an installation space is arranged in the shell, and the joint assembly and the air flow duct are arranged in the installation space; The extended sleeve is provided with a detection port, an air outlet and an air inlet, wherein the detection port is provided at one end of the extended sleeve, the air outlet is provided at the other end of the extended sleeve, and the air inlet is provided at the side wall of the extended sleeve; The joint assembly is provided with an air chamber, the extension sleeve is connected to the air chamber through the air inlet, and the air chamber is connected to the air flow duct, so that the extension sleeve, the joint assembly and the air flow duct are connected in sequence to form an air inlet channel; the end of the air flow duct away from the joint assembly is used to connect the detection assembly.

2. The handheld pulmonary function meter according to claim 1, characterized in that: The extended sleeve comprises: an outer sleeve and an inner sleeve, at least part of the inner sleeve is inserted into one end of the outer sleeve; the outer sleeve is detachably connected to the inner sleeve; The end of the inner sleeve away from the outer sleeve is formed as the detection port; the air inlet is arranged on the side wall of the outer sleeve and the inner sleeve on the side close to the joint assembly; wherein a screen is also arranged in the extended sleeve; The joint assembly comprises: a first joint assembly and a second joint assembly, wherein the first joint assembly and the second joint assembly are arranged in the installation space at intervals along the axial direction of the extension sleeve; The screen is arranged between the first joint assembly and the second joint assembly.

3. The handheld pulmonary function meter according to claim 1, characterized in that: The shell comprises a hand-held portion and a support portion, wherein the support portion is arranged above the hand-held portion, the extended sleeve is arranged on the support portion, and the installation space is arranged inside the hand-held portion.

4. The handheld pulmonary function meter according to claim 2, characterized in that: The air inlet includes: a first air inlet and a second air inlet; the first air inlet is arranged on a side of the extension sleeve close to the first joint assembly, and the second air inlet is arranged on a side of the extension sleeve close to the second joint assembly; the first air inlet is connected to the first joint assembly, and the second air inlet is connected to the second joint assembly.

5. The handheld pulmonary function meter according to claim 1, characterized in that: The joint assembly comprises: a vent joint, a joint sleeve and the air chamber; The tail end of the vent joint is provided with a first connection portion, and the first connection portion is arranged through the air inlet; the circumferential side of the vent joint is also provided with a first extension portion, and the first extension portion is arranged between the first connection portion and the top end of the vent joint; The joint sleeve has a second extension portion at one end close to the vent joint, and the first extension portion abuts against the second extension portion; a receiving space is provided inside the joint sleeve, and the top end of the vent joint is provided in the receiving space; the joint sleeve has a second connection portion at one end away from the first extension portion, and the second connection portion is connected to the airflow duct; The air chamber is formed at the top of the vent joint, the bottom of the joint sleeve and the inner wall of the joint sleeve.

6. The handheld pulmonary function meter according to claim 5, characterized in that: The ventilation joint is provided with a first air intake passage, the joint sleeve is provided with a second air intake passage, the first air intake passage and the second air intake passage are coaxially arranged; the air chamber is arranged between the first air intake passage and the second air intake passage.

7. The handheld pulmonary function meter according to claim 3, characterized in that: A sealing partition is provided between the hand-held portion and the support portion, and the hand-held portion and the sealing partition form the installation space; The extended sleeve and the sealing baffle are spaced apart along the extending direction of the handheld portion, and the joint assembly is passed through the sealing baffle.

8. The handheld pulmonary function meter according to claim 3, characterized in that: The extended sleeve is connected to the support portion through a buckle and a slot, and the shape of the extended sleeve is adapted to that of the support portion.

9. The handheld pulmonary function meter according to claim 7, characterized in that: The sealing baffle comprises: an upper plate and a lower plate, wherein a first convex stop is provided on a side of the upper plate close to the lower plate, and a first concave stop is provided on a side of the lower plate close to the upper plate, and the first convex stop is matched with the first concave stop; The handheld part includes: a front shell and a rear shell, the front shell and the rear shell enclose the installation space; a second convex stop is provided on the circumferential side of the front shell, and a second concave stop is provided on the circumferential side of the rear shell, and the second convex stop is adapted to the second concave stop.

10. The handheld pulmonary function meter according to claim 1, characterized in that: A power supply rack is provided in the installation space, the power supply rack is hollowed out, and a battery assembly is provided in the power supply rack; Wherein, a limiting portion is provided on the outer side of the power supply rack, and the airflow duct is embedded in the limiting portion.

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