Blocking valve and lung function detector

Abstract

The utility model provides a blocking valve and a lung function detector, the blocking valve is used for the lung function detector, the blocking valve comprises a valve seat and a blocking device, the valve seat is provided with a hollow cavity, and one end of the valve seat is used for being connected with a collecting device of the lung function detector; the plugging device comprises a fixing seat and a plugging assembly, and the plugging assembly is connected with the fixing seat. The fixed seat is connected with the other end of the valve seat, and the plugging assembly is movably arranged in the hollow cavity; at least part of the fixed seat extends into the hollow cavity; a locking hole is formed in one of the outer wall of the fixing base and the inner wall of the valve seat, an elastic structure is arranged on the other one of the outer wall of the fixing base and the inner wall of the valve seat, and the elastic structure is used for being elastically clamped with the locking hole. According to the blocking valve and the lung function detector provided by the invention, interruption of a lung function test caused by misoperation of a user can be reduced, so that the test efficiency of the lung function detection of the user can be improved.

Description

Technical Field

[0001] This application belongs to the field of pulmonary function testing technology, and in particular relates to a blocking valve and a pulmonary function testing instrument. Background Technology

[0002] With the increasing prevalence of pulmonary function testing devices, the requirements for these devices are becoming more stringent. Currently available pulmonary function testing devices typically employ a linear plug-and-play structure between the occlusion device and the valve seat. This means the occlusion device is inserted into the valve seat in a straight line for assembly and can be pulled out in the same straight line for disassembly. Since users need to apply a certain amount of force to hold the pulmonary function testing device during testing, this linear plug-and-play structure is prone to user error. Users may accidentally pull the valve seat connected to the sampling device out of the entire pulmonary function testing device during the test, interrupting the test and affecting the efficiency of the user's pulmonary function testing. Utility Model Content

[0003] To address the shortcomings of existing technologies, this application provides a blocking valve and a pulmonary function testing instrument. Users cannot easily pull the fixing seat of the blocking valve and the sealing component connected to the fixing seat from the valve seat of the blocking valve, which can reduce the interruption of pulmonary function testing due to user misoperation, thereby improving the testing efficiency of users in conducting pulmonary function tests.

[0004] On one hand, this application provides a blocking valve for a pulmonary function testing device, the blocking valve comprising:

[0005] A valve seat having a hollow cavity, one end of which is used for connection to the data acquisition device of the pulmonary function testing instrument; and

[0006] A plugging device includes a fixed base and a plugging assembly, the plugging assembly being connected to the fixed base; the fixed base is connected to the other end of the valve seat, and the plugging assembly is movably disposed in the hollow cavity;

[0007] At least a portion of the fixing seat extends into the hollow cavity; one of the outer wall of the fixing seat and the inner wall of the valve seat is provided with a locking hole, and the other of the outer wall of the fixing seat and the inner wall of the valve seat is provided with an elastic structure, which is used to elastically engage with the locking hole.

[0008] In one possible implementation, the locking hole is disposed on the outer wall of the fixed seat, and the elastic structure is disposed on the inner wall of the valve seat; the elastic structure includes a movable member and an elastic member; one end of the elastic member is fixedly connected to the inner wall of the valve seat, and the other end of the elastic member is fixedly connected to the movable member, and the movable member is used to engage with the locking hole under the elastic action of the elastic member.

[0009] In one possible implementation, the elastic structure further includes a mounting member embedded in the inner wall of the valve seat; the mounting member has a receiving cavity communicating with the hollow cavity, the elastic member is movably disposed in the receiving cavity, one end of the elastic member is fixedly connected to the inner wall of the mounting member, and at least a portion of the movable member is received within the receiving cavity.

[0010] In one possible implementation, the outer wall of the fixed seat is provided with a first guide portion, and the inner wall of the valve seat is provided with a second guide portion; one of the first guide portion and the second guide portion is a guide slider, and the other of the first guide portion and the second guide portion is a guide groove, and the guide slider can be slidably received in the guide groove.

[0011] In one possible implementation, the first guide portion is a guide slider, and the second guide portion is a guide groove; the guide groove includes a first guide groove and a second guide groove that are connected to each other, the first guide groove extends axially along the valve seat and passes through the end face of the valve seat connected to the fixed seat; the second guide groove extends circumferentially along the valve seat and is spaced apart from the end face of the valve seat connected to the fixed seat; when the guide slider is located in the second guide groove, the elastic structure cooperates with the locking hole.

[0012] In one possible implementation, the guide slider includes a limiting portion and a guiding portion connected circumferentially along the fixed base. When the guide slider is located in the first guide groove, the limiting portion faces away from the second guide groove, and the guiding portion faces the second guide groove. From the end of the guiding portion facing away from the limiting portion to the end of the guiding portion connected to the limiting portion, the cross-sectional size of the guiding portion gradually increases.

[0013] In one possible implementation, there are multiple guide sliders, which are evenly arranged on the outer wall of the fixed seat along the circumference of the fixed seat; there are multiple guide grooves, which are evenly arranged on the inner wall of the valve seat along the circumference of the valve seat; each guide slider can be slidably received in one guide groove.

[0014] In one possible implementation, the inner wall of the valve seat is provided with an annular step extending circumferentially along the valve seat; the sealing assembly is used to seal the annular step to block the acquisition device of the pulmonary function testing instrument.

[0015] In one possible implementation, the sealing assembly includes a drive member and a plug. The drive member is fixed to the fixed base, and the plug is connected to the output end of the drive member. The drive member is used to drive the plug to seal the annular step. The drive member includes a magnetic body and a coil. The magnetic body is movably disposed within the fixed base, and the coil is fixed within the fixed base and wound around the magnetic body. The coil is used to drive the magnetic body to move axially along the valve seat after energization, thereby causing the plug to move axially along the valve seat toward or away from the annular step. And / or, a pressure relief hole is provided on the outer wall of the valve seat, and the pressure relief hole communicates with the hollow cavity. The pressure relief hole is configured such that when the plug seals the annular step, the pressure relief hole is isolated from the acquisition device of the pulmonary function testing instrument; when the plug is spaced from the annular step, the pressure relief hole communicates with the acquisition device of the pulmonary function testing instrument.

[0016] On the other hand, this application also provides a lung function testing device, including:

[0017] The aforementioned shut-off valve; and

[0018] A data acquisition device is installed at one end of the valve seat of the blocking valve and is connected to the hollow cavity.

[0019] The blocking valve and pulmonary function testing instrument provided in this application are connected to the valve seat via a fixing seat of a blocking device. The blocking component of the blocking device is movably disposed within the hollow cavity of the valve seat, allowing it to block the acquisition device of the pulmonary function testing instrument, thus enabling the instrument to perform pulmonary function testing. Furthermore, at least a portion of the fixing seat extends into the hollow cavity. One of the outer wall of the fixing seat and the inner wall of the valve seat has a locking hole, and the other has an elastic structure. When the fixing seat and the valve seat are connected, the elastic structure and the locking hole elastically engage, making the connection between the fixing seat and the valve seat more stable and secure. At this time, the user cannot easily pull the fixing seat and the blocking component connected to it from the valve seat, reducing the risk of pulmonary function testing interruption due to user error and thus improving the efficiency of pulmonary function testing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some implementation methods provided by the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an assembly diagram of a lung function testing device provided in one embodiment of this application;

[0022] Figure 2 This is a cross-sectional view of a lung function testing device provided in one embodiment of this application;

[0023] Figure 3 This is an exploded view of a lung function testing device provided in one embodiment of this application;

[0024] Figure 4 This is an assembly drawing of a shut-off valve provided in one embodiment of this application;

[0025] Figure 5 This is an exploded view of a shut-off valve provided in one embodiment of this application;

[0026] Figure 6 This is an assembly drawing of a valve seat and an elastic structure provided in one embodiment of this application;

[0027] Figure 7 This is a structural diagram of a fixing base provided in one embodiment of this application;

[0028] Figure 8 This is a cross-sectional view of an elastic structure provided in an embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or it can be in a component in between. When a component is described as "mounted to" another component, it can be directly on the other component or it can be in a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or it can be in a component in between.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. Directional terms mentioned in the description of this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "top surface," "side surface," "bottom surface," "top wall," "side wall," "bottom wall," "inner wall," "outer wall," "axial," "radial," "circumferential," "length direction," "width direction," "height direction," etc., are merely for reference to the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of this application, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the application. In the description of this application, terms such as "first," "second," "third," "fourth," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0032] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] Please see Figures 1 to 3 , Figure 1 This is an assembly drawing of a lung function testing device according to an embodiment of this application. Figure 2 This is a cross-sectional view of a lung function testing device provided in one embodiment of this application. Figure 3 This is an exploded view of a lung function testing device provided in one embodiment of this application.

[0034] The pulmonary function testing device 1000 provided in this application includes a shut-off valve 100 and a data acquisition device 300. The shut-off valve 100 is detachably mounted on the data acquisition device 300, which includes an airway 301 for collecting gases produced by the user's breathing. The shut-off valve 100 is used to block one end of the airway 301 of the data acquisition device 300, so that the pulmonary function testing device 1000 can perform pulmonary function testing.

[0035] Please see Figures 2 to 5 , Figure 4 This is an assembly drawing of a shut-off valve provided in one embodiment of this application. Figure 5 This is an exploded view of a shut-off valve provided in one embodiment of this application.

[0036] The blocking valve 100 provided in this application includes a valve seat 20 and a blocking device 40, the blocking device 40 being mounted on the valve seat 20. At least a portion of the blocking device 40 is movable relative to the valve seat 20 to block the acquisition device 300. The valve seat 20 includes a first end 20a and a second end 20b disposed opposite to each other. The valve seat 20 has a hollow cavity 21, which extends through the first end 20a and the second end 20b of the valve seat 20. The first end 20a of the valve seat 20 is connected to the acquisition device 300 of the pulmonary function testing instrument 1000, so that the hollow cavity 21 of the valve seat 20 is in communication with the acquisition device 300 of the pulmonary function testing instrument 1000. The second end 20b of the valve seat 20 is connected to the blocking device 40, and at least a portion of the blocking device 40 extends into the hollow cavity 21 of the valve seat 20. The blocking device 40 includes a fixing seat 41 and a blocking assembly 42, the fixing seat 41 being connected to the blocking assembly 42. The fixing seat 41 is connected to the second end 20b of the valve seat 20. At least a portion of the fixing seat 41 is inserted into the hollow cavity 21 of the valve seat 20, with the outer wall of the hollow cavity 21 of the valve seat 20 in contact with the inner wall of the hollow cavity 21 of the second end 20b of the valve seat 20. At least a portion of the sealing assembly 42 is movably disposed in the hollow cavity 21 of the valve seat 20 along the direction from the first end 20a to the second end 20b of the valve seat 20 or along the direction from the second end 20b to the first end 20a of the valve seat 20. The sealing assembly 42 can seal the acquisition device 300 of the pulmonary function testing instrument 1000, so that the pulmonary function testing instrument 1000 can perform pulmonary function testing. The fixing seat 41 extends into the outer wall of the hollow cavity 21 of the valve seat 20 and the inner wall of the second end 20b of the valve seat 20, one having a locking hole 61 and the other having an elastic structure 62. When the fixed seat 41 extends into the hollow cavity 21 of the valve seat 20, the elastic structure 62 engages elastically with the locking hole 61 to prevent the fixed seat 41 from falling off from the second end 20b of the valve seat 20.

[0037] The blocking valve 100 provided in this application is connected to the valve seat 20 via a fixing seat 41 of a blocking device 40, and the blocking component 42 of the blocking device 40 is movably disposed within the hollow cavity 21 of the valve seat 20, so that the blocking component 42 of the blocking device 40 can block the acquisition device 300 of the pulmonary function testing instrument 1000, enabling the pulmonary function testing instrument 1000 to perform pulmonary function testing. Furthermore, with at least a portion of the fixing seat 41 extending into the hollow cavity 21, one of the outer wall of the fixing seat 41 and the inner wall of the valve seat 20 is provided with a locking hole 61, and the other with an elastic structure 62. When the fixing seat 41 is connected to the valve seat 20, the elastic structure 62 elastically engages with the locking hole 61, making the connection between the fixing seat 41 and the valve seat 20 more stable and secure. At this time, the user cannot easily pull the fixing seat 41 and the blocking component 42 connected to the fixing seat 41 from the valve seat 20, which can reduce the interruption of pulmonary function testing due to user misoperation, thereby improving the efficiency of pulmonary function testing.

[0038] Please see Figure 4 and Figure 5 In one specific embodiment, both the fixing seat 41 and the valve seat 20 are made of metal. The fixing seat 41 and the valve seat 20 made of metal can improve the tensile strength after the fixing seat 41 and the valve seat 20 are connected, which is conducive to further improving the stability of the connection between the fixing seat 41 and the valve seat 20.

[0039] Please see Figures 5 to 7 , Figure 6 This is an assembly drawing of a valve seat and an elastic structure according to an embodiment of this application. Figure 7 This is a structural diagram of a fixing seat provided in an embodiment of this application.

[0040] In one specific embodiment, the locking hole 61 is disposed on the outer wall of the fixed seat 41, and the elastic structure 62 is disposed on the inner wall of the valve seat 20. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the elastic structure 62 is elastically compressed by the outer wall of the fixed seat 41, allowing the fixed seat 41 to smoothly extend into the second end 20b of the valve seat 20. After the fixed seat 41 extends from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the elastic structure 62 on the inner wall of the valve seat 20 is positioned opposite to the locking hole 61 on the outer wall of the fixed seat 41. Under the action of its own elastic restoring force, the elastic structure 62 elastically engages within the locking hole 61, thereby preventing the fixed seat 41 from falling off from the second end 20b of the valve seat 20.

[0041] Understandably, in some other embodiments, the locking hole 61 may be disposed on the inner wall of the valve seat 20, and the elastic structure 62 may be disposed on the outer wall of the fixed seat 41. This application does not limit this. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the elastic structure 62 is elastically compressed by the inner wall of the second end 20b of the valve seat 20, so that the fixed seat 41 can smoothly extend into the second end 20b of the valve seat 20. After the fixed seat 41 extends from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the elastic structure 62 on the outer wall of the fixed seat 41 is positioned opposite to the locking hole 61 on the inner wall of the valve seat 20. Under the action of its own elastic restoring force, the elastic structure 62 elastically engages within the locking hole 61, thereby preventing the fixed seat 41 from falling off from the second end 20b of the valve seat 20.

[0042] Please see Figures 5 to 7In this embodiment, there are three elastic structures 62, which are evenly arranged circumferentially along the inner wall of the valve seat 20. There are also three locking holes 61, which are evenly arranged circumferentially along the outer wall of the fixing seat 41. When the fixing seat 41 extends from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the three elastic structures 62 on the inner wall of the valve seat 20 and the three locking holes 61 on the outer wall of the fixing seat 41 are positioned opposite each other. Each elastic structure 62 elastically engages with its corresponding locking hole 61 under its own elastic restoring force, thus preventing the fixing seat 41 from falling off the second end 20b of the valve seat 20. It is understood that in some other embodiments, the number of elastic structures 62 may include, but is not limited to, one, two, four, etc., and the number of locking holes 61 may include, but is not limited to, one, two, four, etc. It is only necessary to ensure that the number of elastic structures 62 is greater than or equal to the number of locking holes 61; this application does not impose any restrictions on this.

[0043] Please see Figures 5 to 8 , Figure 8 This is a cross-sectional view of an elastic structure provided in an embodiment of this application.

[0044] In a more specific embodiment, the elastic structure 62 includes a movable member 621, an elastic member 622, and a mounting member 623. The mounting member 623 is embedded in the inner wall of the second end 20b of the valve seat 20, and has a receiving cavity 624 communicating with the hollow cavity 21 of the valve seat 20. The elastic member 622 is movably disposed within the receiving cavity 624, with one end connected to the inner wall of the mounting member 623 and the other end connected to the movable member 621. Part of the movable member 621 is received within the receiving cavity 624, while another part of the movable member 621 protrudes from the receiving cavity 624 and is located within the hollow cavity 21 of the valve seat 20. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the movable member 621 is squeezed by the outer wall of the fixed seat 41, causing the elastic member 622 to elastically contract. The movable member 621 can be completely accommodated in the receiving cavity 624, so that the fixed seat 41 can smoothly extend into the second end 20b of the valve seat 20. After the fixed seat 41 extends from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the opening of the receiving cavity 624 is positioned opposite to the locking hole 61 of the fixed seat 41. Under the elastic force of the elastic member 622, the movable member 621 enters into the locking hole 61, so that the elastic structure 62 elastically engages with the locking hole 61. Thus, the fixed seat 41 can be disengaged from the second end 20b of the valve seat 20. The blocking valve 100 provided in this embodiment, when the fixed seat 41 extends into the second end 20b of the valve seat 20, is elastically engaged with the locking hole 61 by the movable part 621 of the elastic structure 62, so that the detachable connection between the fixed seat 41 and the valve seat 20 is more secure and stable, which can reduce the interruption of lung function test due to user misoperation, and thus help improve the test efficiency of lung function test.

[0045] Understandably, in some other embodiments, the elastic structure 62 may only include a movable member 621 and an elastic member 622, and a recess may be provided on the inner wall of the valve seat 20 to form a receiving cavity 624 for the mounting member 623. This application does not limit this. One end of the elastic member 622 is fixedly connected to the inner wall of the recess in the valve seat 20 forming the receiving cavity 624 of the mounting member 623, and the other end of the elastic member 622 is fixedly connected to the movable member 621. The movable member 621 is used to engage with the locking hole 61 under the elastic action of the elastic member 622. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the movable member 621 is squeezed by the outer wall of the fixed seat 41, causing the elastic member 622 to elastically contract. The movable member 621 can be completely accommodated within the receiving cavity 624 formed by the recess in the inner wall of the valve seat 20, so that the fixed seat 41 can smoothly extend into the second end 20b of the valve seat 20. When the fixed seat 41 extends from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the opening of the receiving cavity 624 formed by the inner wall of the valve seat 20 is positioned opposite to the locking hole 61 of the fixed seat 41. The movable member 621 enters into the locking hole 61 under the elastic force of the elastic member 622, so that the elastic structure 62 is elastically engaged with the locking hole 61. Thus, the fixed seat 41 can be detached from the second end 20b of the valve seat 20. In the shut-off valve 100 provided in this embodiment, the elastic structure 62 omits the mounting member 623, making the structure of the elastic structure 62 and the shut-off valve 100 simpler and helping to reduce the manufacturing cost of the elastic structure 62 and the shut-off valve 100.

[0046] Understandably, in some embodiments, the movable member 621 is spherical, and the accommodating cavity 624 includes a movable cavity and a limiting cavity. The movable cavity and the limiting cavity are connected, and the opening of the movable cavity away from the limiting cavity is connected to the hollow cavity 21 of the valve seat 20. The movable member 621 is movably disposed within the movable cavity. The size of the opening of the limiting cavity away from the movable cavity is smaller than the size of the movable cavity, and the size of the opening of the limiting cavity away from the movable cavity is smaller than the diameter of the movable member 621. By ensuring that the size of the opening of the limiting cavity away from the movable cavity is smaller than the size of the movable cavity, and the size of the opening of the limiting cavity away from the movable cavity is smaller than the diameter of the movable member 621, the spherical movable member 621 is prevented from completely detaching from the accommodating cavity 624 under the action of the elastic member 622. This avoids the phenomenon that the movable member 621 cannot enter the locking hole 61 during the process of the fixed seat 41 extending into the valve seat 20, which is beneficial to improving the reliability of the connection between the fixed seat 41 and the valve seat 20, and improving the reliability of the elastic engagement between the elastic structure 62 and the locking hole 61.

[0047] Please see Figures 4 to 7In one specific embodiment, the outer wall of the fixed seat 41 extending into the second end 20b of the valve seat 20 is provided with a first guide portion 411, and the inner wall of the second end 20b of the valve seat 20 is provided with a second guide portion 22. The first guide portion 411 and the second guide portion 22 cooperate to guide the fixed seat 41 into the second end 20b of the valve seat 20. This facilitates the opposite arrangement of the locking hole 61 on the outer wall of the fixed seat 41 and the elastic structure 62 on the inner wall of the valve seat 20, which helps to improve the accuracy of the elastic engagement between the elastic structure 62 and the locking hole 61. One of the first guide portion 411 and the second guide portion 22 is a guide slider, and the other is a guide groove. The guide slider can be slidably received in the guide groove, making the process of the fixed seat 41 extending into the second end 20b of the valve seat 20 smoother.

[0048] Please see Figures 4 to 7 In this embodiment, the first guide portion 411 is a guide slider, which protrudes from the outer wall of the second end 20b of the fixed seat 41 that extends into the valve seat 20. The second guide portion 22 is a guide groove, which is recessed into the inner wall of the valve seat 20. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the guide slider on the fixed seat 41 slides within the guide groove on the valve seat 20 to guide the fixed seat 41 into the hollow cavity 21 of the valve seat 20.

[0049] Understandably, in some other embodiments, the first guide portion 411 can be a guide groove, which is recessed on the outer wall of the second end 20b of the fixed seat 41 extending into the valve seat 20. The second guide portion 22 can be a guide slider, which protrudes from the inner wall of the valve seat 20; this application does not limit this. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the guide slider on the valve seat 20 slides within the guide groove on the fixed seat 41 to guide the fixed seat 41 into the hollow cavity 21 of the valve seat 20.

[0050] Please see Figures 4 to 7In a more specific embodiment, the guide groove includes a first guide groove 221 and a second guide groove 222 that are connected. The first guide groove 221 extends along the axial direction of the valve seat 20 (from the second end 20b to the first end 20a of the valve seat 20) and passes through the end face of the end of the valve seat 20 connected to the fixing seat 41. The second guide groove 222 extends circumferentially along the valve seat 20 and is spaced apart from the end face of the end of the valve seat 20 connected to the fixing seat 41 (the second end 20b of the valve seat 20). As the fixing seat 41 extends from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, the guide slider is first driven into the first guide groove 221, and the guide slider slides along the extending direction of the first guide groove 221 (from the second end 20b to the first end 20a of the valve seat 20) until the guide slider is located at the communication point between the second guide groove 222 and the first guide groove 221. Then, the guide slider is driven to rotate around the second end 20b of the valve seat 20 to the first end 20a of the valve seat 20, so that the guide slider enters the second guide groove 222. When the guide slider is located in the second guide groove 222, the elastic structure 62 is positioned opposite to the locking hole 61, thereby causing the elastic structure 62 to elastically engage with the locking hole 61.

[0051] The shut-off valve 100 provided in this embodiment includes a first guide groove 221 and a second guide groove 222 that are connected by a guide slide. The first guide groove 221 extends axially along the valve seat 20 and passes through the end face of one end of the valve seat 20 connected to the fixed seat 41. The second guide groove 222 extends circumferentially along the valve seat 20 and is spaced apart from the end face of one end of the valve seat 20 connected to the fixed seat 41. During the connection process between the fixed seat 41 and the valve seat 20, the fixed seat 41 first extends axially into the second end 20b of the valve seat 20, and then rotates circumferentially along the valve seat 20 so that the guide slider of the fixed seat 41 is received in the second guide groove 222 and the elastic structure 62 is elastically engaged with the locking hole 61, thereby realizing the connection between the fixed seat 41 and the valve seat 20. Therefore, when the user applies opposing forces along the axial direction of the valve seat 20 to both the fixed seat 41 and the valve seat 20, the fixed seat 41 cannot detach from the valve seat 20 due to the restriction of the guide slider by the second guide groove 222. This improves the stability of the connection between the fixed seat 41 and the valve seat 20, reduces the interruption of the lung function test due to user error, and thus improves the efficiency of the user's lung function test. Moreover, when the user applies opposing forces along the circumference of the valve seat 20 to both the fixed seat 41 and the valve seat 20, the connection between the fixed seat 41 and the valve seat 20 is strong and stable due to the elastic engagement of the elastic structure 62 and the locking hole 61. The user cannot easily pull the fixed seat 41 off the valve seat 20, which reduces the interruption of the lung function test due to user error and thus improves the efficiency of the user's lung function test.

[0052] Understandably, in some other embodiments, the guide groove may only include a first guide groove 221 extending along the axial direction of the valve seat 20 (from the second end 20b of the valve seat 20 to the first end 20a of the valve seat 20), the first guide groove 221 penetrating the end face of the valve seat 20 connected to the fixed seat 41, and this application does not limit this. During the process of the fixed seat 41 extending from the second end 20b of the valve seat 20 into the hollow cavity 21 of the valve seat 20, only the guide slider is driven into the first guide groove 221, and the guide slider slides along the extension direction of the first guide groove 221 (from the second end 20b of the valve seat 20 to the first end 20a of the valve seat 20) until the guide slider is located on the inner wall of the first guide groove 221 facing away from the second end 20b of the valve seat 20, the elastic structure 62 is disposed opposite to the locking hole 61, and the elastic structure 62 and the locking hole 61 are elastically engaged.

[0053] Please see Figures 4 to 7 In a more specific embodiment, the guide slide includes a first guide groove 221 and a second guide groove 222 that are connected. The first guide groove 221 extends axially along the valve seat 20 and passes through the end face of one end of the valve seat 20 connected to the fixing base 41. The second guide groove 222 extends circumferentially along the valve seat 20 and is spaced apart from the end face of one end of the valve seat 20 connected to the fixing base 41. The guide slider includes a limiting portion 4111 and a guiding portion 4112 connected circumferentially along the fixing base 41. When the guide slider is located in the first guide groove 221, the limiting portion 4111 faces away from the second guide groove 222, and the guiding portion 4112 faces the second guide groove 222. From the end of the guiding portion 4112 facing away from the limiting portion 4111 to the end of the guiding portion 4112 connected to the limiting portion 4111, the cross-sectional size of the guiding portion 4112 gradually increases. When the guide slider is located at the junction of the first guide groove 221 and the second guide groove 222, the guide slider continues to rotate circumferentially around the valve seat 20. The guide part 4112 enters the second guide groove 222 before the limiting part 4111. Since the cross-sectional size of the guide part 4112 gradually increases from the end of the guide part 4112 away from the limiting part 4111 to the end of the guide part 4112 connected to the limiting part 4111, the guide part 4112 will not abut against the opening of the first guide groove 221 when it enters the second guide groove 222. This facilitates the guide part 4112 to guide the limiting part 4111 and the entire guide slider into the second guide groove 222, which helps to improve the smoothness of the connection between the fixed seat 41 and the valve seat 20. Furthermore, at the connection point between the guide portion 4112 and the limiting portion 4111, it is preferable that the cross-sectional dimensions of the guide portion 4112 and the limiting portion 4111 are equal. This can prevent the connection point between the guide portion 4112 and the limiting portion 4111 from abutting against the opening of the first guide groove 221 connected to the second guide groove 222, which is beneficial to further improve the smoothness of the connection between the fixed seat 41 and the valve seat 20.

[0054] Please see Figure 2 and Figures 4 to 7 In a more specific embodiment, the guide groove includes a first guide groove 221 and a second guide groove 222 that are connected. The first guide groove 221 extends axially along the valve seat 20 and passes through the end face of the end of the valve seat 20 connected to the fixed seat 41. The second guide groove 222 extends circumferentially along the valve seat 20 and is spaced apart from the end face of the end of the valve seat 20 connected to the fixed seat 41. Multiple guide sliders are evenly arranged on the outer wall of the fixed seat 41 circumferentially. Multiple guide grooves are evenly arranged on the inner wall of the valve seat 20 circumferentially. Each guide slider can be slidably received within a guide groove. The arrangement of multiple guide sliders and multiple guide grooves makes the guidance more stable during the insertion of the fixed seat 41 into the valve seat 20. Simultaneously, it can also prevent the fixed seat 41 from tilting relative to the valve seat 20, which is beneficial to improving the sealing effect of the sealing assembly 42 connected to the fixed seat 41 on the acquisition device 300 of the lung function tester 1000. It is understood that the number of guide grooves and guide sliders can be 2, 3, 4 or 5, etc., and this application does not limit this.

[0055] Please see Figure 2 and Figures 4 to 7In one specific embodiment, the inner wall of the valve seat 20 is provided with an annular step 23 extending circumferentially along the valve seat 20. The sealing assembly 42 is used to seal the annular step 23 to block the acquisition device 300 of the lung function testing instrument 1000. Specifically, the hollow cavity 21 of the valve seat 20 includes a first cavity 211 and a second cavity 212, which are connected. The inner diameter of the first cavity 211 is smaller than the inner diameter of the second cavity 212. The first cavity 211 is the cavity formed by the annular step 23. The first cavity 211 is located at the first end 20a of the valve seat 20, and the second cavity 212 is located at the second end 20b of the valve seat 20. The first cavity 211 is used to communicate with the acquisition device 300 of the lung function testing instrument 1000, and the second cavity 212 is used to connect with the fixed base 41. The second cavity 212 is also used for the sealing assembly 42 to be movably positioned. When the blocking component 42 blocks the annular step 23, the first cavity 211 and the second cavity 212 are separated and not connected to each other. At this time, the user can perform lung function testing through the acquisition device 300 of the lung function tester 1000. By blocking the side of the annular step 23 facing the second cavity 212 with the blocking component 42 of the blocking device 40, it is possible to prevent the blocking component 42 from contacting the acquisition device 300 of the lung function tester 1000, prevent the blocking component 42 from exerting force on the acquisition device 300 of the lung function tester 1000, and prevent the acquisition device 300 of the lung function tester 1000 from falling off the blocking valve 100 of the lung function tester 1000, thus preventing the test from being interrupted. This helps to improve the efficiency of the user's lung function testing through the lung function tester 1000.

[0056] Please see Figure 2 and Figures 4 to 7 In a more specific embodiment, the blocking assembly 42 includes a drive member 421, a connecting rod 422, and a plug 423. The drive member 421 is fixed to the fixing base 41. One end of the connecting rod 422 is connected to the output end of the drive member 421, and the other end of the connecting rod 422 is connected to the plug 423. The drive member 421 is used to drive the connecting rod 422 to move the plug 423 within the second cavity 212. When the plug 423 seals the annular step 23, the blocking valve 100 of the pulmonary function testing instrument 1000 blocks the acquisition device 300 of the pulmonary function testing instrument 1000. At this time, the user can perform pulmonary function testing through the acquisition device 300 of the pulmonary function testing instrument 1000. The driving component 421 includes a magnetic body and a coil. The magnetic body is movably disposed in the fixed base 41 and is connected to the end of the connecting rod 422 away from the plug 423. The coil is fixed in the fixed base 41 and wound around the magnetic body. The coil is used to drive the magnetic body to move along the axial direction of the valve seat 20 after being energized, thereby driving the connecting rod 422 and the plug 423 to move along the axial direction of the valve seat 20 toward or away from the annular step 23, so that the plug 423 is sealed or spaced from the annular step 23.

[0057] Traditional rotary motors use an output shaft to drive a plug 423 to seal the data acquisition device 300. Since the plug 423 needs to seal the device through linear motion, the rotation of the rotary motor's output shaft must be converted into linear motion via a transmission structure. During this process, the effective thrust of the rotary motor on the plug 423 decreases, easily leading to poor sealing of the plug 423 against the data acquisition device 300, and in severe cases, failure of the plug 423 to seal the device 300. However, selecting a rotary motor with higher torque increases its size and cost, further increasing the overall size and cost of the lung function testing instrument 1000. In this embodiment, however, the connecting rod 422 and the plug 423 reciprocate within the second cavity 212 via electromagnetic drive, eliminating the need for a transmission structure to convert the plug 423 into linear motion. Therefore, the effective thrust of the driving component 421 on the connecting rod 422 and the plug 423 is higher, resulting in better sealing of the plug 423 against the data acquisition device 300. Moreover, the drive unit 421 is small in size and low in cost.

[0058] Please see Figures 4 to 7 In a more specific embodiment, the plug 423 comprises a flexible material, and an annular protrusion 231 is provided on the wall surface of the annular step 23 facing the fixed seat 41 (the wall surface of the annular step 23 facing the second cavity 212). The plug 423 is used to flexibly contact the annular protrusion 231 to seal the annular step 23. The plug 423, made of flexible material, contacts the annular step 23 to achieve sealing. The plug 423, made of flexible material, can undergo extrusion deformation, which helps to improve the sealing effect between the plug 423 and the annular step 23. Simultaneously, the annular protrusion 231 on the wall surface of the annular step 23 facing the second cavity 212, and the plug 423's contact with the annular protrusion 231 to achieve sealing, can further increase the deformation of the plug 423, which is beneficial to further improving the sealing effect of the plug 423 on the annular step 23.

[0059] Please see Figure 2 and Figures 4 to 6In a more specific embodiment, a pressure relief hole 24 is provided on the outer wall of the valve seat 20, and the pressure relief hole 24 communicates with the hollow cavity 21. The pressure relief hole 24 is configured such that when the plug 423 seals the annular step 23, the pressure relief hole 24 is isolated from the data acquisition device 300 of the pulmonary function testing instrument 1000; when the plug 423 is spaced apart from the annular step 23, the pressure relief hole 24 is connected to the data acquisition device 300 of the pulmonary function testing instrument 1000. In other words, the pressure relief hole 24 is located on the outer wall of the second cavity 212 of the valve seat 20 near the first cavity 211. When the plug 423 seals the annular step 23, the pressure relief hole 24 is isolated from the first cavity 211. When the plug 423 is spaced apart from the annular boss, the pressure relief hole 24, the second cavity 212, and the first cavity 211 are connected in sequence. By setting the pressure relief hole 24, the user can achieve pressure relief by controlling the position of the plug 423 during lung function testing. That is, by controlling the plug 423 to be spaced apart from the annular step 23, the user's exhaled air can be discharged to the outside of the lung function tester 1000 through the first chamber 211, the second chamber 212 and the pressure relief hole 24, which can avoid the phenomenon of suffocation and achieve effective pressure relief function, which helps to improve the user's experience during lung function testing.

[0060] Furthermore, there are multiple pressure relief holes 24, which are evenly distributed on the outer wall of the second cavity 212 of the valve seat 20 near the first cavity 211. Each pressure relief hole 24 is configured such that when the plug 423 seals the annular step 23, each pressure relief hole 24 is isolated from the first cavity 211. When the plug 423 is spaced from the annular boss, the multiple pressure relief holes 24, the second cavity 212, and the first cavity 211 are sequentially connected. The arrangement of multiple pressure relief holes 24 improves the pressure relief effect and enhances the user's experience during lung function testing.

[0061] It is understandable that the number of pressure relief holes 24 may include, but is not limited to, 2, 3, 4, 5, etc., and this application does not impose any restrictions on this.

[0062] The above are some embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A shut-off valve, characterized in that, For use in a pulmonary function testing device, the shut-off valve includes: A valve seat having a hollow cavity, one end of which is used for connection to the data acquisition device of the pulmonary function testing instrument; and A plugging device includes a fixed base and a plugging assembly, the plugging assembly being connected to the fixed base; the fixed base is connected to the other end of the valve seat, and the plugging assembly is movably disposed in the hollow cavity; At least a portion of the fixing seat extends into the hollow cavity; one of the outer wall of the fixing seat and the inner wall of the valve seat is provided with a locking hole, and the other of the outer wall of the fixing seat and the inner wall of the valve seat is provided with an elastic structure, which is used to elastically engage with the locking hole.

2. The shut-off valve as described in claim 1, characterized in that, The locking hole is disposed on the outer wall of the fixed base, and the elastic structure is disposed on the inner wall of the valve seat; The elastic structure includes a movable component and an elastic component; one end of the elastic component is fixedly connected to the inner wall of the valve seat, and the other end of the elastic component is fixedly connected to the movable component. The movable component is used to engage with the locking hole under the elastic action of the elastic component.

3. The shut-off valve as described in claim 2, characterized in that, The elastic structure further includes a mounting member, which is embedded in the inner wall of the valve seat; the mounting member has a receiving cavity communicating with the hollow cavity, the elastic member is movably disposed in the receiving cavity, one end of the elastic member is fixedly connected to the inner wall of the mounting member, and at least a portion of the movable member is received in the receiving cavity.

4. The shut-off valve as described in claim 1, characterized in that, The outer wall of the fixed seat is provided with a first guide portion, and the inner wall of the valve seat is provided with a second guide portion; one of the first guide portion and the second guide portion is a guide slider, and the other of the first guide portion and the second guide portion is a guide groove, and the guide slider can be slidably received in the guide groove.

5. The shut-off valve as described in claim 4, characterized in that, The first guide part is a guide slider, and the second guide part is a guide groove; The guide groove includes a first guide groove and a second guide groove that are connected to each other. The first guide groove extends along the axial direction of the valve seat and passes through the end face of the valve seat that is connected to the fixed seat. The second guide groove extends along the circumference of the valve seat and is spaced apart from the end face of the valve seat that is connected to the fixed seat. When the guide slider is located in the second guide groove, the elastic structure cooperates with the locking hole.

6. The shut-off valve as described in claim 5, characterized in that, The guide slider includes a limiting part and a guiding part connected circumferentially along the fixed base. When the guide slider is located in the first guide groove, the limiting part faces away from the second guide groove, and the guiding part faces the second guide groove. From the end of the guiding part facing away from the limiting part to the end of the guiding part connected to the limiting part, the cross-sectional size of the guiding part gradually increases.

7. The shut-off valve as described in claim 5, characterized in that, The number of guide sliders is multiple, and the multiple guide sliders are evenly arranged on the outer wall of the fixed seat along the circumference of the fixed seat; the number of guide grooves is multiple, and the multiple guide grooves are evenly arranged on the inner wall of the valve seat along the circumference of the valve seat; each guide slider can be slidably received in one guide groove.

8. The shut-off valve as claimed in claim 1, characterized in that, The inner wall of the valve seat is provided with an annular step extending circumferentially along the valve seat; the sealing assembly is used to seal the annular step to block the acquisition device of the lung function tester.

9. The shut-off valve as described in claim 8, characterized in that, The sealing assembly includes a drive component and a plug. The drive component is fixed to the fixed base, and the plug is connected to the output end of the drive component. The drive component is used to drive the plug to seal the annular step. The drive component includes a magnetic body and a coil. The magnetic body is movably disposed within the fixed base, and the coil is fixed within the fixed base and wound around the magnetic body. The coil is used to drive the magnetic body to move along the axial direction of the valve seat after being energized, thereby causing the plug to move along the axial direction of the valve seat toward or away from the annular step. And / or, a pressure relief hole is provided on the outer wall of the valve seat, and the pressure relief hole communicates with the hollow cavity; the pressure relief hole is configured such that when the sealing assembly seals the annular step, the pressure relief hole is isolated from the acquisition device of the pulmonary function tester, and when the plug is spaced apart from the annular step, the pressure relief hole communicates with the acquisition device of the pulmonary function tester.

10. A lung function testing device, characterized in that, include: The shut-off valve as described in any one of claims 1 to 9; as well as A data acquisition device is installed at one end of the valve seat of the blocking valve and is connected to the hollow cavity.

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