A pressure regulating structure and a medical device

Abstract

The present invention discloses a pneumatic pressure regulating structure and a medical device. The pneumatic pressure regulating structure includes a gas path component and a regulating component. Among them, the regulating component is rotatably arranged on the gas path component. The upstream section of the air inlet channel of the gas path component is communicated with the downstream section of the air inlet channel of the gas path component through the first communication channel of the regulating component. The upstream section of the air return channel of the gas path component is communicated with the downstream section of the air return channel of the gas path component through the second communication channel of the regulating component. The flow cross-sectional area between the upstream section and the downstream section of the air inlet channel and / or the flow cross-sectional area between the upstream section and the downstream section of the air return channel changes with the rotation of the regulating component. The above pneumatic pressure regulating structure is simple and compact and can be directly used for the handheld part of the medical device. In this way, the user does not need to leave the operation position to adjust the input working air pressure of the gas source device. Just rotate the regulating component directly, which is convenient and fast to operate and helps to reduce the waiting time of the patient.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic medical devices, and particularly relates to a pneumatic pressure regulating structure and a medical device. Background Art

[0002] During the actual use of pneumatic medical devices in some dental fields, due to the different oral conditions of different patients and possible differences in usage scenarios, it often occurs that the same device with the same parameters is used for different patients or in different scenarios, and the patient experience varies greatly. In order to make the experience of all patients better in different usage scenarios as much as possible, dentists can only leave the patient's location and adjust the input working pressure of the gas source device to change its output power to match different patients or usage scenarios. However, this adjustment method is inconvenient to operate and increases the waiting time of patients. Summary of the Invention

[0003] In view of this, the first object of the present invention is to provide a pneumatic pressure regulating structure, so that users can conveniently and quickly adjust the pneumatic pressure.

[0004] The second object of the present invention is to provide a medical device based on the above pneumatic pressure regulating structure.

[0005] To achieve the above objects, the present invention provides the following technical solutions:

[0006] A pneumatic pressure regulating structure includes a gas path component and an adjusting component. The adjusting component is rotatably arranged on the gas path component. The upstream section of the intake passage of the gas path component is communicated with the downstream section of the intake passage of the gas path component through the first communication passage of the adjusting component. The upstream section of the return air passage of the gas path component is communicated with the downstream section of the return air passage of the gas path component through the second communication passage of the adjusting component. The flow cross-sectional area between the upstream section and the downstream section of the intake passage and / or the flow cross-sectional area between the upstream section and the downstream section of the return air passage changes with the rotation of the adjusting component.

[0007] Preferably, the gas path component includes two split components. The upstream section of the intake passage and the downstream section of the return air passage are arranged on one of the two split components. The downstream section of the intake passage and the upstream end of the return air passage are arranged on the other of the two split components. The two split components are detachably connected.

[0008] Preferably, it further includes a screw sleeve for connecting the two split components. One of the two split components is provided with an external thread adapted to the internal thread of the screw sleeve;

[0009] The outer wall of the other of the two split components is provided with an annular rib, the annular rib has a through groove penetrating through the two end faces of the annular rib, the inner wall of the screw sleeve is provided with a boss that can pass through the through groove, and the boss passes through the through groove and cooperates with the end face of the annular rib, and the two split components are pressed and fixed as the screw sleeve is screwed and cooperated with the external thread.

[0010] Preferably, a plurality of the through grooves are circumferentially arranged on the annular rib in a non-uniform distribution, and a plurality of the bosses are correspondingly arranged on the inner wall of the screw sleeve in a non-uniform circumferential distribution.

[0011] Preferably, the adjusting member includes a regulating valve and an operating member coaxially arranged, the first communication channel and the second communication channel are both arranged on the regulating valve, the regulating valve is rotatably arranged in the gas path member, the operating member is arranged outside the gas path member, the side wall of the gas path member is provided with a rotation limiting groove, and the connection structure between the regulating valve and the operating member is reciprocally slidably arranged in the rotation limiting groove.

[0012] Preferably, the operating member is an annular knob coaxially arranged with the regulating valve, and the annular knob is sleeved outside the gas path member.

[0013] Preferably, the adjusting member further includes a valve seat, the valve seat is detachably arranged in the gas path member, and the regulating valve is rotatably matched with the valve seat.

[0014] Preferably, one of the first communication channel and the second communication channel penetrates through the adjusting member coaxially with the rotation axis of the adjusting member, and the other of the first communication channel and the second communication channel penetrates through the adjusting member deviating from the rotation axis of the adjusting member.

[0015] Preferably, the first communication channel penetrates through the adjusting member coaxially with the rotation axis of the adjusting member, the upstream section of the intake channel includes a communicating section and an inlet section that are communicated with each other, the communicating section and the inlet section are arranged in parallel and offset, one end of the communicating section away from the inlet section is butted against the first communication channel, one end of the inlet section away from the communicating section serves as the intake end of the intake channel, and the downstream section of the intake channel is coaxially arranged with the first communication channel.

[0016] Preferably, an air outlet pipe coaxial with the first communication channel is arranged on one side of the adjusting member away from the upstream section of the intake channel, and the lumen of the air outlet pipe serves as the downstream section of the intake channel.

[0017] Preferably, an inlet channel is further included. The inlet channel includes an inlet section and an outlet pipe. The inlet section is disposed on the gas path component, and an assembly connection hole coaxial with and communicating with the communication section is provided at the end of the inlet section. One end of the outlet pipe sequentially passes through the outlet gas pipe, the first communication channel, and the communication section and is inserted and matched with the assembly connection hole.

[0018] Preferably, the second communication channel penetrates through the adjustment member deviating from the rotation axis of the adjustment member, and the cross-sectional shape of the second communication channel includes one of a linear waist shape, an arc waist shape, a circular shape, an elliptical shape, and a polygonal shape.

[0019] Preferably, the cross-sectional shape of the second communication channel is an arc waist shape, and the shape of the end of one of the upstream section and the downstream section of the return air channel that is docked with the second communication channel is an arc waist shape that is the same as the cross-sectional shape of the second communication channel.

[0020] A medical device includes the air pressure adjustment structure as described in any one of the above.

[0021] To achieve the above object, the present invention provides an air pressure adjustment structure. The air pressure adjustment structure includes a gas path component and an adjustment member. Among them, the adjustment member is rotatably disposed on the gas path component. The upstream section of the intake channel of the gas path component is communicated with the downstream section of the intake channel of the gas path component through the first communication channel of the adjustment member, and the upstream section of the return air channel of the gas path component is communicated with the downstream section of the return air channel of the gas path component through the second communication channel of the adjustment member. The flow cross-sectional area between the upstream section and the downstream section of the intake channel and / or the flow cross-sectional area between the upstream section and the downstream section of the return air channel changes with the rotation of the adjustment member; the above air pressure adjustment structure is simple and compact and can be directly installed on the handheld part of the medical device. In this way, the user does not need to leave the operation position to adjust the input working air pressure of the gas source device, and directly rotates the adjustment member to adjust the flow cross-sectional area of the intake channel and / or the return air channel, which is convenient and fast to operate and helps to reduce the waiting time of the patient.

[0022] The present invention also provides a medical device based on the above air pressure adjustment structure. Since the medical device adopts the above air pressure adjustment structure, the medical device has the beneficial effects of the above air pressure adjustment structure and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Schematic diagram of the air pressure regulating structure provided by the embodiment of the present invention from one perspective;

[0025] Figure 2 The air pressure regulating structure provided by the embodiment of the present invention is from Figure 1 Schematic diagram of the structure from another perspective after rotating 90°;

[0026] Figure 3 is Figure 1 Cross-sectional view;

[0027] Figure 4 Exploded view of a split member and a screw sleeve in the air pressure regulating structure provided by the embodiment of the present invention;

[0028] Figure 5 Top view of the screw sleeve in the air pressure regulating structure provided by the embodiment of the present invention;

[0029] Figure 6 Cross-sectional view of two split members connected by a screw sleeve in the air pressure regulating structure provided by the embodiment of the present invention;

[0030] Figure 7 Schematic diagram of the air path direction of the air pressure regulating structure provided by the embodiment of the present invention;

[0031] Figure 8 is Figure 2 Cross-sectional view;

[0032] Figure 9 Schematic diagram of the regulating valve of the air pressure regulating structure provided by the embodiment of the present invention;

[0033] Figure 10 Top view of the regulating valve of the air pressure regulating structure provided by the embodiment of the present invention;

[0034] Figure 11 Schematic diagram of one of the split members of the air pressure regulating structure provided by the embodiment of the present invention;

[0035] Figure 12 is Figure 11 Bottom view;

[0036] Figure 13 Schematic diagram of the working member used in conjunction with the air pressure regulating structure provided by the embodiment of the present invention;

[0037] Figure 14 Schematic diagram of the assembled structure of the air pressure regulating structure and the working member provided by the embodiment of the present invention.

[0038] In the figure:

[0039] 1 is a pneumatic pressure regulating structure; 110 is the first split member; 111 is the air intake connection pipe; 112 is the air return connection pipe; 113 is the water inlet connection pipe; 114 is the upstream section of the air intake passage; 1141 is the inlet section; 1142 is the connection section; 115 is the downstream section of the air return passage; 116 is the annular rib; 117 is the through slot; 118 is the water inlet section; 120 is the second split member; 121 is the upstream section of the air return passage; 130 is the screw sleeve; 131 is the boss; 140 is the regulating member; 141 is the regulating valve; 142 is the annular knob; 143 is the connection structure; 144 is the valve seat; 145 is the first communication passage; 146 is the second communication passage; 150 is the water outlet pipe; 160 is the air outlet pipe; 2 is the working member. Detailed implementation manners

[0040] One of the cores of the present invention is to provide a pneumatic pressure regulating structure, and the structural design of the pneumatic pressure regulating structure enables users to conveniently and quickly adjust the air pressure.

[0041] Another core of the present invention is to provide a medical device based on the above pneumatic pressure regulating structure.

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] Please refer to Figures 1-3 , Figure 1 which is a schematic structural diagram of the pneumatic pressure regulating structure provided by the embodiment of the present invention from one perspective, Figure 2 and Figure 1 is a schematic structural diagram of the pneumatic pressure regulating structure provided by the embodiment of the present invention from another perspective after rotating 90° from Figure 3 and Figure 1 is a cross-sectional view of

[0044] A pneumatic pressure regulating structure 1 provided by the embodiment of the present invention, and the pneumatic pressure regulating structure 1 includes a gas path member and a regulating member 140.

[0045] Among them, the adjusting member 140 is rotatably arranged on the air path member. The upstream section 114 of the intake air passage of the air path member is communicated with the downstream section of the intake air passage of the air path member through the first communication passage 145 of the adjusting member 140. The upstream section 121 of the air return passage of the air path member is communicated with the downstream section 115 of the air return passage of the air path member through the second communication passage 146 of the adjusting member 140. The flow cross-sectional area between the upstream section 114 and the downstream section of the intake air passage and / or the flow cross-sectional area between the upstream section 121 and the downstream section of the air return passage changes with the rotation of the adjusting member 140. That is, the working air pressure can be adjusted only by adjusting the flow cross-sectional area of the intake air passage, or the working air pressure can be adjusted only by adjusting the flow cross-sectional area of the air return passage, or the flow cross-sectional areas of the intake air passage and the air return passage can be adjusted simultaneously to realize the adjustment of the working air pressure. When the intake air passage and the air return passage are adjusted simultaneously, one adjustment method is that the flow cross-sectional areas of both increase or decrease simultaneously, and the other adjustment method is that the flow cross-sectional area of one increases and the other decreases.

[0046] Compared with the prior art, the air pressure adjusting structure 1 provided by the embodiment of the present invention is simple and compact, and can be directly installed on the handheld part of the medical device. In this way, the user does not need to leave the operation position to adjust the input working air pressure of the air source device, and directly rotates the adjusting member 140 to adjust the flow cross-sectional area of the intake air passage and / or the air return passage, which is convenient and fast to operate, and helps to reduce the waiting time of the patient.

[0047] The above-mentioned air path member can adopt an integral structure or a split structure. In the embodiment of the present invention, as Figures 1-3 shown, the air path member includes two split members. The upstream section 114 of the intake air passage and the downstream section 115 of the air return passage are arranged on one of the two split members, and the downstream section of the intake air passage and the upstream end of the air return passage are arranged on the other of the two split members. The two split members are detachably connected, and the two split members can be detachably connected in various ways, such as being snap-connected to each other or connected by fasteners, etc.

[0048] In a specific embodiment of the present invention, the two split members are connected by a screw sleeve 130. As Figures 4-6 shown, the air pressure adjusting structure 1 further includes a screw sleeve 130 for connecting the two split members. One of the two split members is provided with an external thread adapted to the internal thread of the screw sleeve 130; an annular rib 116 is arranged on the outer wall of the other of the two split members, and the annular rib 116 has a through groove 117 penetrating through the two end faces of the annular rib 116. The through groove 117 can be as Figure 4The straight groove perpendicular to the end faces of both ends of the annular rib 116 shown may also be an inclined groove not perpendicular to the end faces of both ends of the annular rib 116, or may be a special-shaped groove. A boss 131 capable of passing through the through groove 117 is provided on the inner wall of the screw sleeve 130. The boss 131 passes through the through groove 117 and cooperates with the end face of the annular rib 116, and presses and fixes the two split components as the screw sleeve 130 is screwed and fitted with the external thread.

[0049] Specifically, in the embodiment of the present invention, the first split component 110 is provided with an annular rib 116. The upstream section 114 of the intake passage and the downstream section 115 of the return passage are arranged on the first split component 110. The second split component 120 is provided with an external thread. The downstream section of the intake passage and the upstream section 121 of the return passage are arranged on the second split component 120. In application, first, the end of the screw sleeve 130 that is used to dock with the second split component 110 is sleeved, so that the boss 131 on the screw sleeve 130 passes through the through groove 117. Then, the screw sleeve 130 is fitted with the external thread of the second split component 120. During the tightening process, the boss 131 on the screw sleeve 130 acts on the end face of the annular rib away from the second split component 120 to pull the first split component 110 and the second split component 120 closer until they are pressed and docked and fixed.

[0050] It should be noted that the above annular rib 116 may also be arranged inside the screw sleeve 130, and then the boss 131 is arranged on the outer wall of the first split component 110. The principle of the two is the same and will not be elaborated.

[0051] One pair or multiple pairs of the above through grooves 117 and bosses 131 may be provided. In an embodiment of the present invention, a plurality of unevenly distributed through grooves 117 are arranged in the circumferential direction of the annular rib 116, and a plurality of bosses 131 that are unevenly distributed along the circumferential direction are correspondingly arranged on the inner wall of the screw sleeve 130, as Figure 5 shown. This uneven distribution method can reduce the probability that all the bosses 131 and the through grooves 117 are opposite after the screw sleeve 130 is screwed and fitted with the external thread, so as to better realize the connection of the two split components.

[0052] Further optimize the above technical solution. The adjusting member 140 includes a regulating valve 141 and an operating member coaxially arranged. The first communication channel 145 and the second communication channel 146 are both arranged in the regulating valve 141. The regulating valve 141 is rotatably arranged in the gas path member, and the operating member is arranged outside the gas path member for easy user operation. A rotation limiting groove is arranged on the side wall of the gas path member, and the rotation limiting groove is used to limit the rotation amplitude of the adjusting member 140. The connection structure 143 between the regulating valve 141 and the operating member is slidably arranged in the rotation limiting groove. The regulating valve 141, the operating member and the connection structure 143 can be of a split structure, or at least two of them can be of an integral structure. The above operating member can adopt various forms, such as a push rod shape, a button shape, etc.

[0053] In an embodiment of the present invention, the above operating member is an annular knob 142 coaxially arranged with the regulating valve 141, and the annular knob 142 is sleeved outside the gas path member.

[0054] Further optimize the above technical solution, such as Figure 3 As shown, the adjusting member 140 further includes a valve seat 144. The valve seat 144 is detachably arranged in the gas path member. The regulating valve 141 is rotatably matched with the valve seat 144. The valve seat 144 serves as a fixing structure of the adjusting member 140 and can be used to connect other components, such as the following air outlet pipe 160. At the same time, the gap between the valve seat 144 and the gas path member can be used as a part of the air return channel.

[0055] In an embodiment of the present invention, a method of adjusting the working air pressure by only adjusting the flow cross-sectional area of one of the intake channel and the air return channel is adopted. Therefore, one of the first communication channel 145 and the second communication channel 146 penetrates the adjusting member 140 coaxially with the rotation axis of the adjusting member 140. In this way, no matter how the adjusting member 140 rotates, it can be ensured that the communication channel penetrating along the rotation axis of the adjusting member 140 is not affected. The other of the first communication channel 145 and the second communication channel 146 penetrates the adjusting member 140 deviating from the rotation axis of the adjusting member 140.

[0056] Specifically, as Figure 7 shown, the first communication channel 145 penetrates the adjusting member 140 coaxially with the rotation axis of the adjusting member 140. The upstream section 114 of the intake channel includes a communication section 1142 and an inlet section 1141. The communication section 1142 and the inlet section 1141 are communicated with each other and arranged in parallel and offset. One end of the communication section 1142 far from the inlet section 1141 is butted against the first communication channel 145. One end of the inlet section 1141 far from the communication section 1142 serves as the intake end of the intake channel. The downstream section of the intake channel is coaxially arranged with the first communication channel 145.

[0057] As Figure 3 andFigure 7 As shown in the figure, on one side of the adjusting member 140 away from the upstream section 114 of the intake passage, there is an air outlet pipe 160 coaxial with the first communication passage 145. The lumen of the air outlet pipe 160 serves as the downstream section of the intake passage. The air outlet pipe 160 is inserted and matched with the valve seat 144, and a sealing structure is provided between the two. The sealing structure is composed of two sealing rings.

[0058] As Figure 8 shown, the above-mentioned air pressure regulating structure 1 further includes a water inlet passage. The water inlet passage includes a water inlet section 118 and a water outlet pipe 150. The water inlet section 118 is arranged on the air path member, and at the end of the water inlet section 118, there is an assembly connection hole coaxial and communicating with the communication section 1142. One end of the water outlet pipe 150 sequentially passes through the air outlet pipe 160, the first communication passage 145, and the communication section 1142 and is inserted and matched with the assembly connection hole, so that the water outlet end and the air outlet end of the air pressure regulating structure 1 are coaxially arranged.

[0059] Corresponding to the first communication passage 145 that penetrates through the regulating valve 141 along the rotation axis of the regulating valve 141, the second communication passage 146 penetrates through the regulating member 140 deviating from the rotation axis of the regulating member 140. The cross-sectional shape of the second communication passage 146 includes one of a linear waist shape, an arc waist shape, a circular shape, an elliptical shape, and a polygon. The polygon includes but is not limited to a triangle, a quadrilateral, a trapezoid, etc.

[0060] Specifically, as Figure 9 and Figure 10 shown, the cross-sectional shape of the second communication passage 146 is an arc waist shape. The shape of the end of one of the upstream section 121 and the downstream section of the air return passage that is docked with the second communication passage 146 is an arc waist shape that is the same as the cross-sectional shape of the second communication passage 146. As Figure 11 and Figure 12 shown, the shape of the end of the downstream section 115 of the air return passage of the first split member 110 that is docked with the second communication passage 146 is an arc waist shape.

[0061] A water inlet connection pipe 113 is provided at the water inlet end of the above-mentioned water inlet passage, an air inlet connection pipe 111 is provided at the air inlet end of the above-mentioned intake passage, and an air return connection pipe 112 is provided at the air return end of the above-mentioned air return passage. The distribution of the water inlet connection pipe 113, the air inlet connection pipe 111, and the air return connection pipe 112 corresponds to the four-hole connector of a standard dental handpiece for easy docking.

[0062] In the above-mentioned embodiment, sealing structures are respectively provided between the first split member 110 and the second split member 120, between the regulating valve 141 and the first split member 110, and between the regulating valve 141 and the second split member 120. The sealing structure can at least seal the joint between the intake passage and the air return passage.

[0063] An embodiment of the present invention further provides a medical device, which includes the air pressure adjusting structure 1 as described in the above embodiment. Since the medical device adopts the above air pressure adjusting structure 1, the technical effects of the medical device can be referred to the above embodiment.

[0064] Further, as Figure 13 shown, the medical device further includes a working member 2, and the working member 2 is detachably connected and combined with one end of the above air pressure adjusting structure 1.

[0065] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts among the various embodiments can be referred to each other.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pneumatic pressure regulating structure, characterized in that, it includes a gas path component and a regulating component. The regulating component is rotatably arranged on the gas path component. The upstream section of the intake passage of the gas path component is communicated with the downstream section of the intake passage of the gas path component through the first communication passage of the regulating component. The upstream section of the return air passage of the gas path component is communicated with the downstream section of the return air passage of the gas path component through the second communication passage of the regulating component. The flow cross-sectional area between the upstream section and the downstream section of the intake passage and / or the flow cross-sectional area between the upstream section and the downstream section of the return air passage changes with the rotation of the regulating component; the gas path component includes two split components. The upstream section of the intake passage and the downstream section of the return air passage are arranged on one of the two split components. The downstream section of the intake passage and the upstream end of the return air passage are arranged on the other of the two split components. The two split components are detachably connected; it further includes a screw sleeve for connecting the two split components. One of the two split components is provided with an external thread adapted to the internal thread of the screw sleeve; the outer wall of the other of the two split components is provided with an annular rib. The annular rib has a through groove penetrating through the two end faces of the annular rib. The inner wall of the screw sleeve is provided with a convex platform that can pass through the through groove. The convex platform passes through the through groove and cooperates with the end face of the annular rib, and presses and fixes the two split components as the screw sleeve is screwed and fitted with the external thread.

2. The pneumatic pressure regulating structure according to claim 1, characterized in that, a plurality of unevenly distributed through grooves are circumferentially arranged on the annular rib, and a plurality of convex platforms that are unevenly distributed along the circumference are correspondingly arranged on the inner wall of the screw sleeve.

3. The pneumatic pressure regulating structure according to claim 1 or 2, characterized in that, the regulating component includes a regulating valve and an operating member arranged coaxially. The first communication passage and the second communication passage are both arranged on the regulating valve. The regulating valve is rotatably arranged in the gas path component. The operating member is arranged outside the gas path component. The side wall of the gas path component is provided with a rotation limiting groove. The connection structure between the regulating valve and the operating member is reciprocally slidably arranged in the rotation limiting groove.

4. The pneumatic pressure regulating structure according to claim 3, characterized in that, the operating member is an annular knob arranged coaxially with the regulating valve. The annular knob is sleeved outside the gas path component.

5. The pneumatic pressure regulating structure according to claim 3, characterized in that, the regulating component further includes a valve seat. The valve seat is detachably arranged in the gas path component. The regulating valve and the valve seat are rotatably matched.

6. The pneumatic pressure regulating structure according to any one of claims 1-2 and 4-5, characterized in that, One of the first communication channel and the second communication channel penetrates the adjusting member coaxially with the rotation axis of the adjusting member, and the other of the first communication channel and the second communication channel penetrates the adjusting member deviating from the rotation axis of the adjusting member.

7. The air pressure adjusting structure according to claim 6, wherein, The first communication channel penetrates the adjusting member coaxially with the rotation axis of the adjusting member. The upstream section of the air intake channel includes a communicating section and an inlet section that are communicated with each other. The communicating section and the inlet section are arranged in parallel and offset. One end of the communicating section far from the inlet section is butted with the first communication channel. One end of the inlet section far from the communicating section serves as the air intake end of the air intake channel. The downstream section of the air intake channel is arranged coaxially with the first communication channel.

8. The air pressure adjusting structure according to claim 7, wherein, An air outlet pipe coaxial with the first communication channel is arranged on one side of the adjusting member far from the upstream section of the air intake channel. The lumen of the air outlet pipe serves as the downstream section of the air intake channel.

9. The air pressure adjusting structure according to claim 8, wherein, It further includes a water inlet channel, which includes a water inlet section and an air outlet pipe. The water inlet section is arranged on the air path member, and an assembly connection hole coaxial and communicated with the communicating section is arranged at the end of the water inlet section. One end of the air outlet pipe sequentially passes through the air outlet pipe, the first communication channel and the communicating section and is inserted and matched with the assembly connection hole.

10. The air pressure adjusting structure according to any one of claims 7-9, wherein, The second communication channel penetrates the adjusting member deviating from the rotation axis of the adjusting member. The cross-sectional shape of the second communication channel includes one of a straight waist shape, an arc waist shape, a circular shape, an elliptical shape and a polygonal shape.

11. The air pressure adjusting structure according to claim 10, wherein, The cross-sectional shape of the second communication channel is an arc waist shape. One of the upstream section and the downstream section of the air return channel has an end shape butt-jointed with the second communication channel that is the same as the cross-sectional shape of the second communication channel, i.e., an arc waist shape.

12. A medical device, wherein, It includes the air pressure adjusting structure according to any one of claims 1-11.

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