Mechanical two-way valve, air pump and electronic blood pressure monitor

Abstract

The present application provides a mechanical two-way valve, an air pump and an electronic sphygmomanometer, wherein the mechanical two-way valve comprises a first shell, a second shell and an elastic member installed between the first shell and the second shell. An exhaust hole and a first vent hole are respectively provided on the first shell; an air inlet hole is provided on the second shell. The first vent hole is connected to the cuff by connecting the air outlet of the air pump with the air inlet hole of the mechanical two-way valve. When the air pump supplies air to the mechanical two-way valve, the elastic member deforms toward the exhaust hole under the atmospheric pressure of the air inlet hole, blocks the exhaust hole, and connects the air inlet hole with the first vent hole, so that the cuff can be inflated; when the air pump stops supplying air, the elastic member returns to its original state under the action of elastic force, blocks the air inlet hole, and connects the exhaust hole with the first vent hole, so that the gas in the cuff can be discharged. The electronic sphygmomanometer does not need to adopt the traditional solenoid-type electromagnetic valve structure, can realize mechanical air intake and exhaust, consumes less power, has a small size and a simple structure.

Description

Technical Field

[0001] The present application belongs to the field of electronic sphygmomanometers, and more specifically, to a mechanical two-way valve, an air pump using the mechanical two-way valve, and an electronic sphygmomanometer using the air pump. Background Art

[0002] When using an electronic sphygmomanometer to measure blood pressure, after the measurement is completed, the compressed gas in the air bag of the cuff or wristband needs to be quickly discharged. In current electronic sphygmomanometers, a solenoid-type electromagnetic valve is usually used for exhaust. However, the solenoid-type electromagnetic valve consumes a lot of power, which will reduce the service life of the electronic sphygmomanometer powered by a dry cell battery; moreover, the electromagnetic valve requires a large number of wires for connection, resulting in a large size and complex structure of the electronic sphygmomanometer. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a mechanical two-way valve, an air pump and an electronic sphygmomanometer to solve the problems in the related art that the electronic sphygmomanometer using a solenoid valve has high power consumption, large size and complex structure.

[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0005] On the one hand, a mechanical two-way valve is provided, comprising:

[0006] A first shell, wherein the first shell is provided with an exhaust hole and a first vent hole;

[0007] A second shell is connected to the first shell, an air inlet hole is provided on the second shell, the first shell and the second shell enclose a containing cavity, and the exhaust hole, the first vent hole and the air inlet hole are respectively connected to the containing cavity;

[0008] An elastic member is installed in the accommodating cavity, and is used to block the exhaust hole when deformed by external pressure to connect the air inlet hole with the first air vent, and to block the air inlet hole when restored to its original state under the action of elastic force to connect the exhaust hole with the first air vent.

[0009] In one embodiment, the elastic member is in a bowl-cup shape, and a first air chamber is enclosed between the elastic member and the first shell, and the exhaust hole and the first vent hole are respectively connected to the first air chamber; a second air chamber is enclosed between the elastic member and the second shell, and the air inlet hole is connected to the second air chamber; a second vent hole is also provided on the second shell, and the second vent hole is used to control the connection and disconnection between the first air chamber and the second air chamber.

[0010] In another embodiment, a third vent hole communicating with the first vent hole is further formed on the first shell.

[0011] In another embodiment, the elastic member is in the form of a sheet, a fourth air vent is formed on the elastic member, and a boss is formed on the second shell at a position corresponding to the fourth air vent; the boss is used to separate from the fourth air vent when the elastic member is deformed by external pressure, so that the elastic member can block the exhaust hole, and the first air hole is connected to the air inlet hole, and to block the fourth air vent when the elastic member returns to its original state under the action of elastic force, so that the elastic member can block the air inlet hole, and the first air hole is connected to the exhaust hole.

[0012] In yet another embodiment, a first groove is formed on the first shell at a position corresponding to the boss, the first groove is spaced apart from the boss, and the fourth vent hole is disposed between the boss and the first groove.

[0013] In another embodiment, a second groove is formed on the side of the first shell facing the second shell, and a ring is installed in the second groove for abutting against the elastic member to block the exhaust hole; one end of the exhaust hole is arranged on the bottom surface of the second groove.

[0014] In another aspect, an air pump is provided, comprising:

[0015] The above mechanical two-way valve;

[0016] a one-way valve assembly connected to the mechanical two-way valve, the one-way valve assembly comprising a one-way valve support seat, and an air inlet umbrella valve and an air outlet umbrella valve respectively mounted on the one-way valve support seat, the air outlet umbrella valve being connected to the air inlet hole of the mechanical two-way valve;

[0017] A piston assembly, the piston assembly comprising a piston support seat connected to the one-way valve support seat and two piston bodies mounted on the piston support seat, the two piston bodies are respectively arranged opposite to the air inlet umbrella valve and the air outlet umbrella valve, and a first through hole for connecting the air inlet umbrella valve with external air is opened on the piston support seat;

[0018] The driving assembly is connected to the piston assembly and is used to drive the two piston bodies to alternately reciprocate so that the air outlet umbrella valve supplies air and the air inlet umbrella valve inhales air.

[0019] In one embodiment, the drive assembly comprises:

[0020] A transmission wing, the two ends of which are respectively connected to the two piston bodies;

[0021] A connecting shaft, one end of which is connected to the middle portion of the transmission wing;

[0022] An eccentric rotor connected to the other end of the connecting shaft;

[0023] The motor is connected to the eccentric rotor and is used for driving the eccentric rotor to rotate.

[0024] In one embodiment, the drive assembly also includes a motor support seat supporting the piston support seat, and the motor support seat is provided with a second through hole connected to the first through hole; the motor support seat is connected to the motor, and the eccentric rotor, the connecting shaft and the transmission wing are arranged in the space enclosed by the piston support seat and the motor support seat.

[0025] In another aspect, an electronic blood pressure monitor is provided, comprising:

[0026] The above-mentioned air pump;

[0027] An air pressure sensor connected to the air outlet of the air pump;

[0028] The cuff is connected to the air outlet of the air pump and the air pressure sensor respectively.

[0029] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects: the present application connects the first vent hole to the cuff by connecting the air outlet of the air pump to the air inlet of the mechanical two-way valve. When the air pump supplies air to the mechanical two-way valve, the elastic member deforms toward the exhaust hole under the atmospheric pressure of the air inlet, thereby blocking the exhaust hole. At this time, the air inlet is connected to the first vent hole, and the cuff can be inflated; when the air pump stops supplying air, the elastic member returns to its original state under the action of elastic force, and the air inlet is blocked. At this time, the exhaust hole is connected to the first vent hole, and the gas in the cuff can be discharged. Therefore, the electronic sphygmomanometer does not need to adopt the traditional solenoid-type electromagnetic valve structure, and can realize mechanical air intake and exhaust, with low power consumption, small size, and simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of the mechanical two-way valve provided in Example 1 of the present application Figure 1 ;

[0032] Figure 2 A schematic diagram of the structure of the mechanical two-way valve provided in Example 1 of the present application Figure 2 ;

[0033] Figure 3 A cross-sectional schematic diagram of the mechanical two-way valve provided in the first embodiment of the present application in an exhaust state;

[0034] Figure 4 A cross-sectional schematic diagram of the mechanical two-way valve provided in Example 1 of the present application when in a gas supply state;

[0035] Figure 5 The structure of the mechanical two-way valve provided in the second embodiment of the present application is shown in FIG. Figure 1 ;

[0036] Figure 6 The structure of the mechanical two-way valve provided in the second embodiment of the present application is shown in FIG. Figure 2 ;

[0037] Figure 7 A cross-sectional schematic diagram of the mechanical two-way valve provided in the second embodiment of the present application when in an exhaust state;

[0038] Figure 8 A cross-sectional schematic diagram of the mechanical two-way valve provided in the second embodiment of the present application when in a gas supply state;

[0039] Fig. 9 The structure of the mechanical two-way valve provided in the third embodiment of the present application is shown in FIG. Figure 1 ;

[0040] Fig.10 The structure of the mechanical two-way valve provided in the third embodiment of the present application is shown in FIG. Figure 2 ;

[0041] Fig.11 A cross-sectional schematic diagram of the mechanical two-way valve provided in the third embodiment of the present application when in an exhaust state;

[0042] Fig.12 A cross-sectional schematic diagram of the mechanical two-way valve provided in the third embodiment of the present application when in a gas supply state;

[0043] Fig.13 Schematic diagram of the air pump provided in Example 1 of the present application Figure 1 ;

[0044] Fig.14 Schematic diagram of the air pump provided in Example 1 of the present application Figure 2 ;

[0045] Fig.15 A cross-sectional schematic diagram of the air pump provided in Example 1 of the present application when in an exhaust state;

[0046] Fig.16 A cross-sectional schematic diagram of the air pump provided in Example 1 of the present application when in an air supply state;

[0047] Fig.17 A cross-sectional schematic diagram of the mechanical two-way valve in the electronic sphygmomanometer provided in Example 1 of the present application when in an exhaust state;

[0048] Fig.18 A cross-sectional schematic diagram of the mechanical two-way valve in the electronic sphygmomanometer provided in Example 1 of the present application when in a gas supply state;

[0049] Fig.19 This is an equivalent schematic diagram of the electronic sphygmomanometer provided in Example 1 of the present application.

[0050] Among them, the main marks of the drawings in the figure are:

[0051] 1-first shell; 11-exhaust hole; 12-first vent hole; 13-third vent hole; 14-first groove; 15-second groove; 16-ring;

[0052] 2-second housing; 21-air inlet; 22-second vent hole; 23-positioning rod; 24-boss;

[0053] 3-elastic member; 30-blind hole; 31-fourth vent hole;

[0054] 4- one-way valve assembly; 41- one-way valve support seat; 42- air inlet umbrella valve; 43- air outlet umbrella valve;

[0055] 5-piston assembly; 50-first through hole; 51-piston support seat; 52-piston body;

[0056] 6-driving assembly; 61-motor; 62-eccentric rotor; 63-connecting shaft; 64-transmission wing; 65-motor support seat; 650-second through hole; 66-screw;

[0057] 7-air pump; 71-air outlet; 72-exhaust port;

[0058] 8-Air pressure sensor; 9-Cuff. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0061] In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0062] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0065] It should be noted that the direction indicated by the arrow in the figure is the direction of air flow.

[0066] Embodiment 1:

[0067] See also Figure 3 and Figure 4, the mechanical two-way valve provided in the first embodiment of the present application is now described. The mechanical two-way valve includes a first shell 1, a second shell 2 and an elastic member 3 installed between the first shell 1 and the second shell 2. The first shell 1 and the second shell 2 are connected and sealed, and a receiving cavity (not marked in the figure) is enclosed between the first shell 1 and the second shell 2. The elastic member 3 is clamped and fixed in the receiving cavity by the first shell 1 and the second shell 2. The first shell 1 is respectively provided with an exhaust hole 11 and a first air vent 12, and the exhaust hole 11 and the first air vent 12 are respectively connected to the receiving cavity; the second shell 2 is provided with an air inlet 21, and the air inlet 21 is connected to the receiving cavity. In the initial position state, the elastic member 3 is not deformed. At this time, the elastic member 3 blocks the air inlet 21, and the exhaust hole 11 is connected to the first air vent 12. When air is supplied to the air inlet 21, the elastic member 3 is deformed toward the exhaust hole 11 by the pressure of the high-pressure air supplied from the air inlet 21. At this time, the deformed elastic member 3 blocks the exhaust hole 11, and the air inlet 21 is connected to the first vent hole 12, thereby realizing the air supply of the mechanical two-way valve. When the air supply to the air inlet 21 stops, the elastic member 3 returns to the initial position under the action of its own elastic force. At this time, the elastic member 3 blocks the air inlet 21, and the exhaust hole 11 is connected to the first vent hole 12, thereby realizing the mechanical exhaust of the mechanical two-way valve.

[0068] In one embodiment, see Figure 3 and Figure 4 As a specific implementation of the mechanical two-way valve provided in the first embodiment of the present application, the elastic member 3 is in the shape of a bowl, and the elastic member 3 and the first shell 1 enclose a first air chamber (not marked in the figure), and the exhaust hole 11 and the first vent hole 12 are respectively connected to the first air chamber; the elastic member 3 and the second shell 2 enclose a second air chamber (not marked in the figure), and the air inlet 21 is connected to the second air chamber; the second shell 2 is also provided with a second vent hole 22, and the second vent hole 22 is used to control the connection and disconnection between the first air chamber and the second air chamber. In this structure, when air is supplied to the second air chamber through the air inlet 21, and the pressure in the second air chamber is greater than the pressure in the first air chamber, the elastic member 3 is deformed toward the exhaust hole 11 under the action of pressure, and at this time, the elastic member 3 blocks the exhaust hole 11, and the second vent hole 22 can connect the first air chamber with the second air chamber, and the gas in the second air chamber can be discharged into the first vent hole 12 through the second vent hole 22, so as to realize the air supply of the mechanical two-way valve. When the air supply to the second air chamber stops and the pressure in the second air chamber is less than or equal to the pressure in the first air chamber, the elastic member 3 returns to its initial position under the action of its own elastic force, the elastic member 3 blocks the air inlet 21, and the second air vent 22 disconnects the first air chamber from the second air chamber. At this time, the exhaust hole 11 is connected to the first air vent 12, thereby realizing the exhaust of the mechanical two-way valve.

[0069] In one embodiment, see Figure 1 and Figure 2A plurality of positioning rods 23 are installed at intervals on the side of the second housing 2 facing the elastic member 3, and a blind hole 30 is correspondingly provided on the elastic member 3 for each positioning rod 23 to extend into. This structure can realize the rapid positioning and disassembly of the elastic member 3 through the cooperation between the positioning rod 23 and the blind hole 30, thereby improving its disassembly and assembly efficiency.

[0070] See also Fig.13 and Fig.14 , the first embodiment of the present application also provides an air pump 7. The air pump 7 includes the above-mentioned mechanical two-way valve, a one-way valve assembly 4, a piston assembly 5 and a drive assembly 6. Fig.13 and Fig.15 The one-way valve assembly 4 includes a one-way valve support seat 41 connected to the second shell 2, and an air inlet umbrella valve 42 for air inlet and an air outlet umbrella valve 43 for air outlet, which are respectively installed on the one-way valve support seat 41. The air outlet umbrella valve 43 is connected to the air inlet hole 21 of the mechanical two-way valve for supplying gas to the mechanical two-way valve.

[0071] See also Fig.13 and Fig.15 The piston assembly 5 includes a piston support seat 51 connected to the one-way valve support seat 41 and two piston bodies 52 installed on the piston support seat 51. The two piston bodies 52 are respectively arranged opposite to the air inlet umbrella valve 42 and the air outlet umbrella valve 43. One piston body 52 is used for gas to enter the air outlet umbrella valve 43 to supply air to the mechanical two-way valve, and the other piston body 52 is used for the air inlet umbrella valve 42 to inhale air. A first through hole 50 is provided on the piston support seat 51 to connect the air inlet umbrella valve 42 with the external air. The air inlet umbrella valve 42 can inhale external air through the first through hole 50, thereby realizing the air intake and exhaust of the piston assembly 5. Among them, the two piston bodies 52 can be integrally formed, which is convenient for processing and manufacturing and has high efficiency.

[0072] See also Fig.13 The driving assembly 6 is connected to the piston assembly 5 and is used to drive the two piston bodies 52 in the piston assembly 5 to alternately reciprocate up and down, so that the air outlet umbrella valve 43 supplies air to the mechanical two-way valve, and the air inlet umbrella valve 42 inhales air to the outside. The driving assembly 6 can adopt any power structure in the existing air pump structure.

[0073] In one embodiment, see Fig.13 and Fig.15As a specific implementation of the mechanical two-way valve provided in the first embodiment of the present application, the driving assembly 6 may include a motor 61, an eccentric rotor 62 connected to the output shaft of the motor 61, a connecting shaft 63 with one end mounted on the eccentric rotor 62, and a transmission wing 64. The other end of the connecting shaft 63 is connected to the middle position of the transmission wing 64, and the two ends of the transmission wing 64 are respectively connected to the two piston bodies 52. In this structure, when the motor 61 is working, the motor 61 drives the eccentric rotor 62 to rotate, and the eccentric rotor 62 drives the two ends of the transmission wing 64 to make alternating up and down reciprocating motions through the connecting shaft 63, thereby realizing the alternating up and down reciprocating motions of the two piston bodies 52. Specifically, when the piston body 52 moves downward, the air inlet parachute valve 42 of the one-way valve assembly 4 opens, and the air outlet parachute valve 43 closes. At this time, the one-way valve assembly 4 inhales air through the first through hole 50; when the piston body 52 moves upward, the air inlet parachute valve 42 of the one-way valve assembly 4 closes, and the air outlet parachute valve 43 opens. At this time, the one-way valve assembly 4 compresses the air into the mechanical two-way valve through the air inlet hole 21.

[0074] In one embodiment, see Fig.14 and Fig.16 As a specific implementation of the mechanical two-way valve provided in Example 1 of the present application, the air pump 7 also includes a motor support seat 65 supporting the piston support seat 51, and a second through hole 650 communicating with the first through hole 50 is provided on the motor support seat 65; the motor support seat 65 is connected to the motor 61, and the eccentric rotor 62, the connecting shaft 63 and the transmission fin 64 are arranged in the space enclosed by the piston support seat 51 and the motor support seat 65. Among them, the motor support seat 65 is connected and fixed to the motor 61 by screws 66. This structure supports the piston support seat 51 through the motor support seat 65, which can improve the stability of the movement of the piston assembly 5. The eccentric rotor 62, the connecting shaft 63 and the transmission fin 64 are arranged in the space enclosed by the piston support seat 51 and the motor support seat 65, which can improve the working stability of the drive assembly 6 and reduce the volume.

[0075] See also Figures 17 to 19 The first embodiment of the present application also provides an electronic sphygmomanometer. The electronic sphygmomanometer includes the mechanical two-way valve described in the first embodiment. The electronic sphygmomanometer integrates the exhaust hole 11 and the first vent hole 12 on the shell to form a first shell 1, thereby reducing the volume of the electronic sphygmomanometer and simplifying the structural design.

[0076] See also Fig.19The electronic sphygmomanometer comprises the above-mentioned air pump 7, an air pressure sensor 8 and a cuff 9 connected to the air outlet 71 of the air pump 7, and the cuff 9 is connected to the air outlet 71 of the air pump 7 and the air pressure sensor 8, respectively. The air pump 7 has an air outlet 71 and an exhaust port 72, wherein the air outlet 71 is the first air vent 12 in the mechanical two-way valve, and the exhaust port 72 is the exhaust port 11 in the mechanical two-way valve. When the electronic sphygmomanometer is used for measurement, the air pump 7 works, and the elastic member 3 is compressed and deformed to block the exhaust port 11 (i.e., the exhaust port 72 of the air pump 7), and the first air vent 12 is connected to the air inlet 21. The air pump 7 supplies air to the air inlet 21 of the mechanical two-way valve through the driving assembly 6, the piston assembly 5 and the one-way valve assembly 4, and the gas fills the cuff 9 through the air inlet 21 and the first air vent 12 to achieve air supply. When the air pump 7 stops supplying air, the elastic member 3 returns to its original state under the action of elastic force. At this time, the elastic member 3 blocks the air inlet 21, and the exhaust hole 11 is connected to the first air hole 12. The gas in the cuff 9 can be discharged through the first air hole 12 and the exhaust hole 11, realizing mechanical exhaust without the need to adopt a traditional solenoid-type electromagnetic valve structure, with low power consumption and small size.

[0077] Embodiment 2:

[0078] See also Figure 7 and Figure 8 , the mechanical two-way valve provided in the second embodiment of the present application is now described. The difference between the mechanical two-way valve provided in the second embodiment of the present application and the mechanical two-way valve provided in the first embodiment is that a third vent hole 13 connected to the first vent hole 12 is also provided on the first housing 1. In this structure, the third vent hole 13 is used to connect to the air pressure sensor 8 for measuring the blood pressure value.

[0079] The other structures of the mechanical two-way valve provided in the second embodiment of the present application are the same as the corresponding structures of the mechanical two-way valve provided in the above-mentioned first embodiment, and will not be described in detail here.

[0080] Embodiment three:

[0081] See also Fig.11 and Fig.12, the mechanical two-way valve provided in the third embodiment of the present application is now described. The difference between the mechanical two-way valve provided in the third embodiment of the present application and the mechanical two-way valve provided in the second embodiment is that: the elastic member 3 is in the form of a sheet, a fourth vent hole 31 is provided on the elastic member 3, and a boss 24 is provided on the second shell 2 at a position corresponding to the fourth vent hole 31; the boss 24 is used to separate from the fourth vent hole 31 when the elastic member 3 is deformed by external pressure, so that the elastic member 3 blocks the exhaust hole 11, and the first vent hole 12 is connected to the air inlet 21, and is used to block the fourth vent hole 31 when the elastic member 3 returns to its original state under the action of elastic force, so that the elastic member 3 blocks the air inlet 21, and the first vent hole 12 is connected to the exhaust hole 11. In this structure, the elastic member 3 can separate the accommodating cavity into a first chamber and a second chamber, the exhaust hole 11 and the first vent hole 12 are respectively connected to the first chamber, and the air inlet 21 is connected to the second chamber. In the initial position state, the elastic member 3 does not deform. At this time, the fourth vent 31 is in close contact with the boss 24, the first chamber and the second chamber are in a disconnected state, the elastic member 3 blocks the air inlet 21, and the exhaust hole 11 is connected to the first vent 12, so that the exhaust of the mechanical two-way valve can be achieved. When air is supplied to the accommodating chamber through the air inlet 21, and the air pressure in the second chamber is greater than the air pressure in the first chamber, the elastic member 3 deforms in the direction of the exhaust hole 11, and the elastic member 3 blocks the exhaust hole 11. At this time, the fourth vent 31 is separated from the boss 24, and the fourth vent 31 connects the first chamber with the second chamber, so that the air inlet 21 can be connected to the first vent 12, so that the air supply of the mechanical two-way valve can be achieved. Moreover, the fourth vent 31 can gradually open with the increase of pressure, thereby improving the ventilation efficiency.

[0082] In one embodiment, see Fig. 9 and Fig.11 As a specific implementation of the mechanical two-way valve provided in the third embodiment of the present application, a first groove 14 is provided on the first housing 1 at a position corresponding to the boss 24, the first groove 14 is spaced apart from the boss 24, and the fourth vent 31 is provided between the boss 24 and the first groove 14. In this structure, the first groove 14 can provide sufficient space for the deformation of the elastic member 3, thereby facilitating the separation of the fourth vent 31 from the boss 24, and realizing the communication between the first chamber and the second chamber.

[0083] In one embodiment, see Fig. 9 and Fig.11As a specific implementation of the mechanical two-way valve provided in the third embodiment of the present application, a second groove 15 is provided on the side of the first housing 1 facing the second housing 2, and a ring 16 is installed in the second groove 15 for abutting against the elastic member 3 to block the exhaust hole 11; one end of the exhaust hole 11 is arranged on the bottom surface of the second groove 15. With this structure, when the elastic member 3 is deformed by force, the elastic member 3 can abut against the ring 16, thereby improving the sealing performance of the elastic member 3 to the exhaust hole 11. Among them, the elastic member 3 can be a hard film, and the ring 16 can be an elastic plastic member.

[0084] The other structures of the mechanical two-way valve provided in the third embodiment of the present application are the same as the corresponding structures of the mechanical two-way valve provided in the above-mentioned second embodiment, and will not be described one by one here.

[0085] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. Mechanical two-way valve, characterized in that: include: A first shell, wherein the first shell is provided with an exhaust hole and a first vent hole; A second shell is connected to the first shell, an air inlet hole is provided on the second shell, the first shell and the second shell enclose a containing cavity, and the exhaust hole, the first vent hole and the air inlet hole are respectively connected to the containing cavity; an elastic member installed in the accommodating cavity, the elastic member being used to block the exhaust hole when deformed by external pressure so as to connect the air inlet hole with the first air vent, and to block the air inlet hole when restored to its original shape under the action of elastic force so as to connect the exhaust hole with the first air vent; The elastic member is in a bowl-cup shape, and a first air chamber is enclosed between the elastic member and the first shell, and the exhaust hole and the first vent hole are respectively connected to the first air chamber; a second air chamber is enclosed between the elastic member and the second shell, and the air inlet hole is connected to the second air chamber; a second vent hole is also provided on the second shell, and the second vent hole is used to control the connection and disconnection between the first air chamber and the second air chamber; A plurality of positioning rods are installed at intervals on the side surface of the second shell facing the elastic member, and a blind hole for each positioning rod to extend into is correspondingly opened on the elastic member.

2. The mechanical two-way valve according to claim 1, characterized in that: The first shell is also provided with a third vent hole which is in communication with the first vent hole.

3. An air pump, characterized in that: include: The mechanical two-way valve according to any one of claims 1 to 2; a one-way valve assembly connected to the mechanical two-way valve, the one-way valve assembly comprising a one-way valve support seat, and an air inlet umbrella valve and an air outlet umbrella valve respectively mounted on the one-way valve support seat, the air outlet umbrella valve being connected to the air inlet hole of the mechanical two-way valve; A piston assembly, the piston assembly comprising a piston support seat connected to the one-way valve support seat and two piston bodies mounted on the piston support seat, the two piston bodies are respectively arranged opposite to the air inlet umbrella valve and the air outlet umbrella valve, and a first through hole for connecting the air inlet umbrella valve with external air is opened on the piston support seat; The driving assembly is connected to the piston assembly and is used to drive the two piston bodies to alternately reciprocate so that the air outlet umbrella valve supplies air and the air inlet umbrella valve inhales air.

4. The air pump according to claim 3, characterized in that The drive assembly comprises: A transmission wing, the two ends of which are respectively connected to the two piston bodies; A connecting shaft, one end of which is connected to the middle portion of the transmission wing; An eccentric rotor connected to the other end of the connecting shaft; The motor is connected to the eccentric rotor and is used for driving the eccentric rotor to rotate.

5. The air pump according to claim 4, characterized in that: The driving assembly also includes a motor support seat supporting the piston support seat, and the motor support seat is provided with a second through hole connected to the first through hole; the motor support seat is connected to the motor, and the eccentric rotor, the connecting shaft and the transmission wing are arranged in the space enclosed by the piston support seat and the motor support seat.

6. An electronic blood pressure monitor, characterized in that: include: The air pump according to any one of claims 3 to 5; An air pressure sensor connected to the air outlet of the air pump; The cuff is connected to the air outlet of the air pump and the air pressure sensor respectively.

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