Inflation and deflation integrated pump and sphygmomanometer

Abstract

The utility model relates to an inflation and deflation integrated pump which comprises an upper shell, an elastic piece, a lower shell and a support, the elastic piece is located between the upper shell and the lower shell, a first air chamber is defined between the upper shell and the elastic piece, a second air chamber is defined between the elastic piece and the lower shell, and the support is located between the upper shell and the lower shell. The support is arranged at the bottom of the lower shell, and a leather cup is arranged between the support and the lower shell. The non-return elastic piece is arranged in the third air guide hole of the elastic piece to be matched with the air suction hole, the continuous air inflation function of the air pump is achieved, the number and the size of components are reduced, and the pure mechanical structure of the air pump is beneficial to saving energy.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an inflation and deflation integrated pump and a sphygmomanometer. Background Art

[0002] In the prior art, before a user measures blood pressure using an electronic sphygmomanometer, it is necessary to inflate the airbag in the cuff or wristband to provide a measurement pressure. After the blood pressure measurement is completed, it is necessary to exhaust the compressed gas in the airbag of the cuff or wristband. Currently, electronic sphygmomanometers mainly achieve the inflation and deflation of the cuff or wristband through the cooperation of an inflation pump and a solenoid valve. However, such a design has some defects: First, the inflation pump and the solenoid valve are relatively large in volume, which increases the overall volume and manufacturing cost of the sphygmomanometer; Second, both the inflation pump and the solenoid valve consume electrical energy during operation. The solenoid valve is closed when energized and opened when de-energized, increasing the user's usage cost; Finally, the glue on the valve core of the solenoid valve is prone to falling off, resulting in the solenoid valve being unable to open or close normally, which will affect the performance and safety of the device.

[0003] In the prior art, a patent document with the publication number CN103767695A proposed a deflation valve, an integrated air pump and an electronic sphygmomanometer. Although this deflation valve can realize the opening and closing of a normally open one-way valve and a normally closed one-way valve, thereby realizing the functions of air intake and deflation, such functions rely on the elastic deformation of an elastomer. The elastomer needs to play the roles of opening and closing the deflation port and the ventilation hole successively, which requires precise control of the deformation area and the sequence of deformation of the elastomer. This not only increases the difficulty of the product manufacturing process, but also increases the working load of the elastomer and reduces its service life.

[0004] In addition, on the one hand, there are differences in the understanding of those skilled in the art; on the other hand, although the inventor studied a large number of documents and patents when making this utility model, due to space limitations, all details and contents are not listed in detail. However, this does not mean that this utility model does not possess the features of these prior arts. On the contrary, this utility model already possesses all the features of the prior arts, and the applicant reserves the right to add relevant prior arts in the background art. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, this application proposes an inflation and deflation integrated pump and a sphygmomanometer, especially an integrated pump applicable to an electronic sphygmomanometer and integrated with an inflatable and deflatable gas path structure, aiming to solve one or more technical problems in the prior art.

[0006] In the prior art, the inflation and deflation of an electronic sphygmomanometer are usually achieved by the cooperation between an air pump and a solenoid valve. However, such a setting method not only increases the overall volume and manufacturing cost of the sphygmomanometer, but also increases the user's usage cost because both the air pump and the solenoid valve consume electrical energy during operation. Moreover, it will also affect the performance and safety of the device because the glue on the valve core of the solenoid valve is prone to loosen and fall off. In the prior art, there have been technical solutions that attempt to reduce the cost of the sphygmomanometer by eliminating the solenoid valve. For example, the patent document with the publication number CN212360134U discloses a quick pressure relief integrated diaphragm pump. This technical solution considers the size of the air pressure and the acting area, and uses the pressure difference between the lower surface of the first central piece and the upper surface of the second central piece to control the opening and closing of the pressure relief hole. However, the lower surface of the second central piece and the upper surface of the first central piece in this technical solution need to be attached together in the natural state, resulting in a significantly different diaphragm acting method in the specific inflation and deflation process compared with the existing technical means. When this technical solution stops inflating, it is necessary to reduce the air pressure on the lower surface of the first central piece to the atmospheric pressure through an additionally provided pressure reduction microchannel, so that the device can perform the pressure relief process.

[0007] To achieve the above object, the present utility model adopts the following technical solution: An inflation and deflation integrated pump, comprising a driving member for generating gas and a gas path structure for gas circulation, wherein the gas path structure includes: an upper housing, an elastic member, a lower housing and a support;

[0008] The elastic member is located between the upper housing and the lower housing, a first air chamber is defined between the upper housing and the elastic member, and a second air chamber is defined between the elastic member and the lower housing;

[0009] A sunken cavity is formed on the upper surface of the lower housing, a slot is formed on the outside of the sunken cavity, a first air guide cavity is arranged on one side in the sunken cavity, a first annular protrusion is arranged in the first air guide cavity, the center of the first annular protrusion is a cavity structure, an air inlet hole is arranged at the center of the sunken cavity, a second air guide cavity and a third air guide cavity are symmetrically arranged on the upper and lower sides of the air inlet hole, a first convex column is arranged in the second air guide cavity, a second convex column is arranged in the third air guide cavity, a vertical groove is arranged on the circumferential surface of the second convex column, the height of the second convex column is higher than the upper surface of the lower housing, and the second air guide cavity and the third air guide cavity are respectively communicated with the first air guide cavity through a first air guide groove;

[0010] The lower surface of the lower housing is provided with three disc-shaped protrusions. The three disc-shaped protrusions are symmetrically arranged along the air inlet hole. Each disc-shaped protrusion is provided with a notch at its edge, and the notch extends to form a notch cavity. An arc-shaped cavity is opened outside each notch cavity. A gap cavity is provided in the gap between three adjacent disc-shaped protrusions. The gap cavity is communicated with the arc-shaped cavity. The depth of the gap cavity is greater than the depth of the arc-shaped cavity. Three cylinders are evenly arranged at the edge of the lower surface of the lower housing;

[0011] The upper housing is provided with an exhaust hole that penetrates its surface and is externally connected to a gas storage device, and a vent hole that communicates with the outside atmosphere. A vent cavity is provided at the bottom of the upper housing corresponding to the vent hole. The vent hole is arranged in the vent cavity. A convex rib is arranged on the outside of the upper housing. The convex rib is matched with the slot and can be connected by plugging;

[0012] The support is arranged at the bottom of the lower housing. Through holes are arranged at the positions of the disc-shaped protrusions corresponding to the support. Second anti-backflow elastic piece concave cavities that match the second anti-backflow elastic pieces are arranged between adjacent through holes. A top column is arranged in the second anti-backflow elastic piece concave cavities. Perforations are arranged at the positions of the cylinders corresponding to the support. Support ribs are arranged outside the perforations. A leather cup is arranged between the support and the lower housing.

[0013] Further, a positioning block for positioning the elastic member is arranged at the left edge of the lower housing. A semi-circular groove is opened on one side of the positioning block facing the elastic member. A protruding portion for positioning the elastic member is arranged on the slot.

[0014] Further, an airbag capable of undergoing elastic deformation is arranged at the positions of the elastic member corresponding to the first air guide cavity and the vent cavity. The airbag with a larger elastic deformation amount than the elastic member can expand to block the vent cavity when the second air chamber is filled with gas, and can recover under the elastic action to open the vent cavity when the second air chamber is not filled with gas.

[0015] Further, a circular concave cavity is arranged at the position of the elastic member corresponding to the second air guide cavity. A first air guide hole is arranged in the circular concave cavity. A second air guide hole is arranged at the position of the elastic member corresponding to the third air guide cavity. A third air guide hole is arranged on the right side of the first air guide hole and the second air guide hole. A first anti-backflow elastic piece is arranged in the third air guide hole.

[0016] Further, a first accommodation cavity is arranged at the position of the circular concave cavity corresponding to the upper housing. A second accommodation cavity is arranged at the position of the second air guide hole corresponding to the upper housing. A third accommodation cavity is arranged at the position of the third air guide hole corresponding to the upper housing. The first accommodation cavity is communicated with the air inlet hole. The second accommodation cavity is communicated with the air inlet hole. The vent cavity is communicated with the air inlet hole. The third accommodation cavity is communicated with the second accommodation cavity.

[0017] Further, the third air guide hole is an arched semi-circular structure, and the first check spring piece is an arched semi-circular structure.

[0018] Further, sealing lines are provided on the outer sides of the second air guide hole and the third air guide hole, and they are connected through the sealing lines.

[0019] Further, a bellows cavity capable of undergoing elastic deformation is provided at the position of the bellows corresponding to the through hole, and a second check spring piece is provided at the position of the bellows corresponding to the concave cavity of the second check spring piece.

[0020] Further, the elastic member has elasticity at least in the area near the first air guide hole provided thereon, so that the hole wall of the first air guide hole fits the side wall of the first convex post in a manner adapted to the shape and size of the first convex post.

[0021] A sphygmomanometer includes an air pump, a pressure sensor, and a cuff or a wristband.

[0022] The utility model has the following beneficial effects:

[0023] 1. By providing components such as an upper housing, an elastic member, a lower housing, a bellows, and a support, the utility model realizes the continuous inflation function of the air pump, reduces the number of components and the volume, not only improves the inflation effect of the integrated pump but also improves the deflation effect, and its pure mechanical structure is beneficial to energy saving.

[0024] 2. The utility model cancels the use of a solenoid valve to control the operation of the inflation pump, reduces the power consumption, thereby reducing the user's usage cost, and ensures the performance and safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the upper surface structure of the lower housing proposed by the utility model;

[0026] Figure 2 It is a schematic diagram of the lower surface structure of the lower housing proposed by the utility model;

[0027] Figure 3 It is a schematic diagram of the upper surface structure of the upper housing proposed by the utility model;

[0028] Figure 4 It is a schematic diagram of the lower surface structure of the upper housing proposed by the utility model;

[0029] Figure 5 It is a schematic diagram of the elastic member structure proposed by the utility model;

[0030] Figure 6 It is a schematic diagram of the structure of the support and the bellows part proposed by the utility model;

[0031] Figure 7 Schematic cross-sectional view of a partial structure proposed by the present utility model;

[0032] Figure 8 Schematic diagram of the vertical groove structure proposed by the present utility model.

[0033] Legend:

[0034] 100: upper housing; 110: first air chamber; 120: exhaust hole; 130: air leakage hole; 150: air leakage cavity; 160: first accommodation cavity; 170: second accommodation cavity; 180: third accommodation cavity; 190: convex rib; 200: lower housing; 201: sunken cavity; 202: slot; 203: gap cavity; 204: notch; 205: notch cavity; 206: arc cavity; 207: disc protrusion; 208: cylinder; 209: positioning block; 210: first annular protrusion; 220: first convex column; 221: second convex column; 222: vertical groove; 230: second air chamber; 240: air inlet hole; 250: first air guide groove; 260: third air guide cavity; 270: second air guide cavity; 280: first positioning protrusion; 290: first air guide cavity; 300: elastic member; 320: second air guide hole; 330: airbag; 340: circular concave cavity; 350: first check valve elastic piece; 360: sealing line; 370: first air guide hole; 380: third air guide hole; 400: leather cup; 410: leather cup cavity; 420: second check valve elastic piece; 500: support; 510: through hole; 520: top column; 530: second check valve elastic piece concave cavity; 540: support rib; 550: perforation. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0036] The utility model relates to an inflation and deflation integrated pump for inflating and deflating a gas storage device, which comprises a driving member for generating gas and a gas path structure for gas circulation. When the gas storage device needs to be inflated, the driving member can pressurize and pump the gas in the external atmosphere into the gas path structure, and the gas flows through the gas path structure and finally enters the gas storage device to complete the inflation of the gas storage device; when the gas storage device needs to be deflated, the driving member stops pumping gas into the gas path structure, and the pressurized gas in the gas storage device flows back into the gas path structure and flows out from the air release hole communicating with the external atmosphere in the gas path structure to complete the deflation of the gas storage device. Specifically, the driving member can be selected to include a piston and a driving motor gas generating device, and the piston can reciprocate under the push of the driving motor, thereby continuously generating gas. During the inflation of the gas storage device, the gas will enter from the air inlet 210 connected to the driving member and finally flow out from the air outlet 120 connected to the gas storage device. As Figures 1 - 8 shown, the gas path structure includes an upper housing 100, an elastic member 300, a lower housing 200 and a support 500; the upper housing 100 is provided with an air outlet 120 penetrating its surface and externally connected to the gas storage device and an air release hole 130 communicating with the external atmosphere, and a deflation chamber 150 is arranged at the bottom of the upper housing 100 corresponding to the air release hole 130, and the air release hole 130 is arranged in the deflation chamber 150; wherein, the air outlet 120 can be connected to a gas storage device (not shown in the figure), and the air release hole 130 is communicated with the external atmosphere. A convex rib 190 is arranged on the outer side of the upper housing 100, and the convex rib 190 matches with the slot and can be connected by plugging. Preferably, the gas storage device can be selected from an air bag in a wristband or cuff connected to an electronic sphygmomanometer.

[0037] The elastic member 300 is located between the upper housing 100 and the lower housing 200. A first gas chamber 110 is defined between the upper housing 100 and the elastic member 300, and the air outlet 120 and the air release hole 130 are arranged in the first gas chamber 110. A second gas chamber 230 is defined between the elastic member 300 and the lower housing 200, and an air inlet 240 is arranged in the second gas chamber 230, and the air inlet 240 is connected to a driving member (not shown in the figure).

[0038] A sunken cavity 201 is formed on the upper surface of the lower housing 200. A slot 202 is formed outside the sunken cavity 201. A first air guide cavity 290 is arranged on one side inside the sunken cavity 201. A first annular protrusion 210 is arranged inside the first air guide cavity 290. The center of the first annular protrusion 210 has a cavity structure. An air inlet hole 240 is arranged at the center of the sunken cavity. A second air guide cavity 270 and a third air guide cavity 260 are symmetrically arranged on the upper and lower sides of the air inlet hole 240. A first convex column 220 is arranged inside the second air guide cavity 270. A second convex column 221 is arranged inside the third air guide cavity 260. A vertical groove 222 is formed on the peripheral surface of the second convex column 221. The height of the second convex column 221 is higher than the upper surface of the lower housing 200. The second air guide cavity 270 and the third air guide cavity 260 are respectively communicated with the first air guide cavity 290 through a first air guide groove 250. Three disc protrusions 207 are arranged on the lower surface of the lower housing 200. The three disc protrusions 207 are symmetrically arranged along the air inlet hole 240. A notch 204 is formed at the edge of each disc protrusion 207. The notch 204 extends to form a notch cavity 205. An arc cavity 206 is formed outside each notch cavity 205. A gap cavity 203 is arranged at the gap between three adjacent disc protrusions 207. The gap cavity 203 is communicated with the arc cavity 206. The depth of the gap cavity 203 is greater than the depth of the arc cavity 206. Three cylinders 208 are evenly arranged at the edge of the lower surface of the lower housing 200.

[0039] When the gas generated by the driving member flows into the second air chamber 230 from the air inlet hole 240, the integrated pump is in the charging stage. The airbag 330 provided on the top surface of the elastic member 300 can elastically deform (i.e., expand) towards the direction of the top surface of the upper housing 100 and block the air vent hole 130. At this time, the position of the elastic member 300 where the airbag 330 is in the expanded state is the first predetermined position. The gas entering the first air chamber 110 from the second air guiding cavity 270 and the third air guiding cavity 260 cannot be discharged from the air vent hole 130 and can only flow through the exhaust hole 120 and enter the gas storage device. In this way, the integrated pump completes the charging of the gas storage device. When the driving member stops generating gas, the integrated pump is in the deflating stage. The airbag 330 resumes deformation (i.e., contracts) to open the air vent hole 130, so that the gas in the gas storage device can flow through the exhaust hole 120 and flow out from the air vent hole 130 to complete deflation. At this time, the position of the elastic member 300 where the airbag 330 is in the contracted state is the second predetermined position. That is to say, the first predetermined position and the second predetermined position only differ at the airbag 330 of the elastic member 300, and the relative positions of the remaining areas of the elastic member 300 and the second air guiding cavity 270 and the third air guiding cavity 260 remain unchanged. With such a setting, the second air guiding cavity 270 and the third air guiding cavity 260 not only play a role in establishing a passage between the first air chamber 110 and the second air chamber 230, but also limit the relative positions of the remaining areas of the elastic member 300 except the airbag 330, avoiding problems such as the airbag 330 not being able to block the air vent hole 130 or not being able to completely leave the air vent hole 130 during expansion and contraction under the same deformation amount due to the change of the predetermined position of the elastic member 300 itself, and ensuring the charging and deflating efficiency.

[0040] The support 500 is arranged at the bottom of the lower housing 200. The disk protrusion 207 is provided with a through hole 510 corresponding to the position of the support 500. A second check spring concave cavity 530 matching the second check spring piece 420 is arranged between adjacent through holes 510. A top column 520 is arranged in the second check spring concave cavity 530. The cylinder body 208 is provided with a through hole 550 corresponding to the position of the support 500. A support rib 540 is arranged outside the through hole 550. A leather cup 400 is arranged between the support 500 and the lower housing 200.

[0041] Specifically, a positioning block 209 for positioning the elastic member 300 is arranged at the left edge of the lower housing 200. A semi-circular groove is formed on one side of the positioning block 209 facing the elastic member 300. A protruding portion 280 for positioning the elastic member 300 is arranged on the slot 202.

[0042] The cooperation between the positioning block 209 and the protrusion 280 can define the installation direction of the elastic member 300, enabling the elastic member 300 to be quickly and correctly installed on the lower housing 200, improving the installation efficiency and the connection stability between components.

[0043] Specifically, the elastic member 300 is provided with an airbag 330 capable of elastic deformation at positions corresponding to the first air guide chamber 290 and the air release chamber 150. The airbag 330 with a larger elastic deformation amount than the elastic member 300 can expand to block the air release chamber 150 when the second air chamber 230 is filled with gas, and can recover under elastic action to open the air release chamber 150 when the second air chamber 230 is not filled with gas.

[0044] Specifically, the elastic member 300 is provided with a circular concave cavity 340 at a position corresponding to the second air guide chamber 270. A first air guide hole 370 is provided in the circular concave cavity 340. The elastic member 300 is provided with a second air guide hole 320 at a position corresponding to the third air guide chamber 260. A third air guide hole 380 is provided on the right side of the first air guide hole 370 and the second air guide hole 320. A first check valve elastic piece 350 is provided in the third air guide hole 380.

[0045] The top of the airbag 330 is closed, and a notch with a surface parallel to the plane where the orifice of the air release hole 130 is located is provided. The surface area of the notch is larger than the cross-sectional area of the air release hole 130. When the airbag 330 expands, the notch will contact the bottom of the air release hole 130 instead of the surface of the airbag 330 with curvature around it. The relatively flat notch structure can improve the tightness of the seal with the air release hole 130, thereby avoiding air leakage due to the arc existing on the top surface of the airbag 330 resulting in imperfect sealing of the air release hole 130.

[0046] Specifically, a first accommodation cavity 160 is provided at a position corresponding to the upper housing 100 in the circular concave cavity 340. A second accommodation cavity 170 is provided at a position corresponding to the upper housing 100 in the second air guide hole 320. A third accommodation cavity 180 is provided at a position corresponding to the upper housing 100 in the third air guide hole 380. The first accommodation cavity 160 is communicated with the air inlet hole 240. The second accommodation cavity 170 is communicated with the air inlet hole 240. The air release chamber 150 is communicated with the air inlet hole 240. The third accommodation cavity 180 is communicated with the second accommodation cavity 170.

[0047] Specifically, the third air guide hole 380 is in an arched semi-circular structure, and the first check valve elastic piece 350 is in an arched semi-circular structure.

[0048] Specifically, sealing lines 360 are provided on the outer sides of the second air guide hole 320 and the third air guide hole 380, and they are connected through the sealing lines 360.

[0049] The sealing line 360 is arranged so that there is a gap between the surfaces of the first boss 220 and the second boss 221 that at least partially pass through the elastic member and the elastic member to allow air flow to pass through, wherein a throttling area between the two air chambers is formed by arranging bosses in the two air chambers for guiding the elastic deformation of the elastic member and by arranging vertical grooves on the circumferential surface of the bosses, and the throttling area can be used to keep the elastic member at a predetermined position in the two air chambers.

[0050] Specifically, a leather cup cavity 410 capable of generating elastic deformation is disposed at a position of the leather cup 400 corresponding to the through hole 510 , and a second anti-return spring piece 420 is disposed at a position of the leather cup 400 corresponding to the second anti-return spring piece concave cavity 530 .

[0051] When the gas generated by the driving member flows in from the air channel at the bottom of the support 500 to expand the non-return spring plate of the leather cup, the gas passes over the non-return spring plate on the leather cup and enters another air channel next to it and flows into the air inlet hole of the lower shell, and enters the second air chamber through the air inlet hole of the lower shell. The airbag deforms to block the air leakage hole, and the gas enters the first air chamber from the position of the convex column to complete the inflation of the gas storage device; when the driving member stops generating gas, the elastic member restores its deformation to open the air leakage hole, and the gas in the gas storage device can flow out from the air leakage hole to complete the deflation.

[0052] Specifically, the elastic member 300 has elastic force at least in the vicinity of the first air guide hole 370 provided thereon, so that the hole wall of the first air guide hole 370 fits with the side wall of the first protruding column 220 in a manner adapted to the shape and size of the first protruding column 220 .

[0053] When the integrated pump needs to inflate the gas storage device, in order to increase the air pressure in the second air chamber 230, a driving member (not shown in the figure) externally connected to the air inlet 210 operates and continuously generates gas. The gas enters the second air guide chamber 270 and the third air guide chamber 260 through the air inlet 240, and is communicated with the first air guide chamber 290 through the first air guide groove 250 connected to the second air guide chamber 270 and the third air guide chamber 260, and gradually fills the entire second air chamber 230. As the amount of gas entering the second air chamber 230 gradually increases, the air pressure in the second air chamber 230 increases. A small amount of gas enters the first air chamber 110 through the first air guide hole 370 and the second air guide hole 320, while most of the gas still remains in the second air chamber 230 and causes the airbag 330 on the elastic member 300 to expand. The top notch of the continuously expanding airbag 330 will finally block the air leakage hole 130 in the upper housing 100. At this time, the expansion of the airbag 330 reaches the maximum extent, and the gas generated by the driving member will all enter the first air chamber 110 through the first air guide hole 370 and the second air guide hole 320. Since the air leakage hole 130 is blocked, the gas entering the first air chamber 110 will enter the gas storage device through the exhaust hole 120 of the housing 100, for example, enter the airbag in the wrist strap or cuff of the electronic sphygmomanometer for subsequent blood pressure measurement work.

[0054] When the integrated pump needs to deflate the gas storage device, in order to reduce the air pressure in the second air chamber 230, the driving member stops generating gas, which causes the air inlet 240 to be blocked by the check valve piece 350 that resumes deformation due to the lack of air flow impact. At this time, the gas in the gas storage device with a relatively higher air pressure than that in the second air chamber 230 will flow backward toward the first air chamber 110 and increase the air pressure in the first air chamber 110, which causes the inflated airbag 330 to gradually contract and exposes the air leakage hole 130. The gas in the first air chamber 110 will be discharged through the air leakage hole 130 to achieve the purpose of rapid deflation.

[0055] A sphygmomanometer includes an air pump, a pressure sensor, and a cuff or a wrist strap.

[0056] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An air charging and discharging integrated pump, comprising a driving member for generating gas and a gas path structure for gas flow, characterized in that, The gas path structure includes: an upper housing (100), an elastic member (300), a lower housing (200), and a support (500); The elastic member (300) is located between the upper housing (100) and the lower housing (200). A first gas chamber (110) is defined between the upper housing (100) and the elastic member (300), and a second gas chamber (230) is defined between the elastic member (300) and the lower housing (200); On the upper surface of the lower housing (200), a sunken cavity (201) is provided. A slot (202) is provided outside the sunken cavity (201). On one side inside the sunken cavity (201), a first air guide cavity (290) is provided. A first annular protrusion (210) is provided in the first air guide cavity (290). The center of the first annular protrusion (210) has a cavity structure. An air inlet hole (240) is provided at the center of the sunken cavity (201). A second air guide cavity (270) and a third air guide cavity (260) are symmetrically provided on the upper and lower sides of the air inlet hole (240). A first convex post (220) is provided in the second air guide cavity (270). A second convex post (221) is provided in the third air guide cavity (260). A vertical groove (222) is provided on the circumferential surface of the second convex post (221). The height of the second convex post (221) is higher than the upper surface of the lower housing (200). The second air guide cavity (270) and the third air guide cavity (260) are respectively connected to the first air guide cavity (290) through a first air guide groove (250); On the lower surface of the lower housing (200), three disc-shaped protrusions (207) are provided. The three disc-shaped protrusions (207) are symmetrically arranged along the air inlet hole (240). A notch (204) is provided at the edge of each disc-shaped protrusion (207). The notch (204) extends to form a notch cavity (205). An arc-shaped cavity (206) is provided outside each notch cavity (205). A gap cavity (203) is provided at the gap between adjacent three disc-shaped protrusions (207). The gap cavity (203) is connected to the arc-shaped cavity (206). The depth of the gap cavity (203) is greater than the depth of the arc-shaped cavity (206). Three cylinders (208) are evenly provided at the edge of the lower surface of the lower housing (200); The upper housing (100) is provided with an exhaust hole (120) that penetrates its surface and is externally connected to a gas storage device, and a vent hole (130) that communicates with the outside atmosphere. A venting cavity (150) is provided at the bottom of the upper housing (100) corresponding to the vent hole (130). The vent hole (130) is provided in the venting cavity (150). A convex rib (190) is provided on the outside of the upper housing (100). The convex rib (190) is matched with the slot (202) and can be connected by plugging; The support (500) is arranged at the bottom of the lower housing (200). A through hole (510) is provided at the position of the disc protrusion (207) corresponding to the support (500). A second anti-reverse spring piece cavity (530) matching the second anti-reverse spring piece (420) is provided between adjacent through holes (510). A top column (520) is arranged in the second anti-reverse spring piece cavity (530). A perforation (550) is provided at the position of the cylinder body (208) corresponding to the support (500). A support rib (540) is provided outside the perforation (550). A leather cup (400) is provided between the support (500) and the lower housing (200).

2. The inflatable and deflatable integrated pump according to claim 1, characterized in that: A positioning block (209) for positioning the elastic member (300) is provided at the left edge of the lower housing (200). A semi-circular groove is formed on the side of the positioning block (209) facing the elastic member (300). A protruding portion (280) for positioning the elastic member (300) is provided on the slot (202).

3. The air charging / discharging integrated pump according to claim 2, characterized in that: An airbag (330) capable of elastic deformation is provided at the positions of the elastic member (300) corresponding to the first air guide cavity (290) and the air release cavity (150). The airbag (330) with a larger elastic deformation amount than the elastic member (300) can expand to block the air release cavity (150) when the second air chamber (230) is filled with gas, and can recover under the elastic action to open the air release cavity (150) when the second air chamber (230) is not filled with gas.

4. The air charging and discharging integrated pump according to claim 1, characterized in that: A circular cavity (340) is provided at the position of the elastic member (300) corresponding to the second air guide cavity (270). A first air guide hole (370) is arranged in the circular cavity (340). A second air guide hole (320) is provided at the position of the elastic member (300) corresponding to the third air guide cavity (260). A third air guide hole (380) is provided on the right side of the first air guide hole (370) and the second air guide hole (320). A first anti-reverse spring piece (350) is arranged in the third air guide hole (380).

5. The air charging and discharging integrated pump according to claim 4, wherein: A first accommodation cavity (160) is provided at the position of the circular cavity (340) corresponding to the upper housing (100). A second accommodation cavity (170) is provided at the position of the second air guide hole (320) corresponding to the upper housing (100). A third accommodation cavity (180) is provided at the position of the third air guide hole (380) corresponding to the upper housing (100). The first accommodation cavity (160) is communicated with the air inlet hole (240). The second accommodation cavity (170) is communicated with the air inlet hole (240). The air release cavity (150) is communicated with the air inlet hole (240). The third accommodation cavity (180) is communicated with the second accommodation cavity (170).

6. The inflatable and deflatable integrated pump according to claim 4, wherein: The third air guide hole (380) is of an arched semi-circular structure. The first anti-reverse spring piece (350) is of an arched semi-circular structure.

7. The air charging and discharging integrated pump according to claim 4, characterized in that: Sealing lines (360) are provided outside both the second air guide hole (320) and the third air guide hole (380), and they are connected through the sealing lines (360).

8. The air charging and discharging integrated pump according to claim 2, wherein: A leather cup cavity (410) capable of undergoing elastic deformation is provided at a position of the leather cup (400) corresponding to the through hole (510), and a second check spring piece (420) is provided at a position of the leather cup (400) corresponding to the second check spring piece concave cavity (530).

9. The air charging and discharging integrated pump according to claim 4, wherein: The elastic member (300) has elasticity at least in a region near the first air guide hole (370) provided thereon, so that the hole wall of the first air guide hole (370) fits against the side wall of the first convex post (220) in a manner adapted to the shape and size of the first convex post (220).

10. A sphygmomanometer having an integrated inflation and deflation pump as described in one of the preceding claims, characterized in that, It includes an air pump, a pressure sensor, and a cuff or a wristband.

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