WO2022011874A1

WO2022011874A1 - Mechanical two-way valve, air pump, and electronic sphygmomanometer

Info

Publication number: WO2022011874A1
Application number: PCT/CN2020/122829
Authority: WO
Inventors: 王利明
Original assignee: 深圳市捷美瑞科技有限公司
Priority date: 2020-07-16
Filing date: 2020-10-22
Publication date: 2022-01-20
Also published as: CN111853279A

Abstract

A mechanical two-way valve, comprising a first housing (1), a second housing (2), and an elastic piece (3). An exhaust hole (11) and a first vent hole (12) are respectively formed in the first housing (1); an air inlet hole (21) is formed in the second housing (2); the first housing (1) and the second housing (2) enclose to form an accommodation cavity; and the elastic piece (3) is mounted in the accommodation cavity. Further disclosed are an air pump comprising the mechanical two-way valve, and an electronic sphygmomanometer comprising the air pump.

Description

Mechanical two-way valve, air pump and electronic sphygmomanometer

This application claims the priority of the Chinese patent application with the application number of 202010686027.6 and the invention-creation title of "Mechanical Two-way Valve, Air Pump and Electronic Sphygmomanometer", which was filed in the China Patent Office on July 16, 2020, the entire contents of which are Incorporated herein by reference.

technical field

The present application relates to the technical field of electronic sphygmomanometers, in particular to a mechanical two-way valve, an air pump and an electronic sphygmomanometer.

Background technique

The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

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. The current electronic sphygmomanometer usually uses a solenoid-type solenoid valve for exhaust. However, the solenoid valve consumes a lot of power, which will reduce the service life of the electronic sphygmomanometer powered by dry batteries; moreover, the solenoid valve needs more wires to connect, resulting in the large volume of the electronic sphygmomanometer, complex structure.

technical problem

One of the purposes of the embodiments of the present application is to provide a mechanical two-way valve, an air pump and an electronic sphygmomanometer, which aims to solve the problems of the electronic sphygmomanometer's large power consumption, large volume and complex structure.

technical solutions

In order to solve the above-mentioned technical problems, the technical solutions adopted in the embodiments of the present application are:

Provided is a mechanical two-way valve, comprising: a first casing, on which an exhaust hole and a first ventilation hole are respectively opened; a second casing, connected with the first casing, The second casing is provided with an air inlet hole, the first casing and the second casing enclose an accommodating cavity, the exhaust hole, the first ventilation hole and the air inlet The holes are respectively communicated with the accommodating cavity; the elastic piece is installed in the accommodating cavity, and the elastic piece is used to block the exhaust hole when it is deformed by external pressure, so as to connect the air intake hole to the accommodating cavity. The first vent hole communicates with the first vent hole, and is used to block the air intake hole when returning to the original state under the action of an elastic force, so as to communicate the exhaust hole with the first vent hole.

beneficial effect

In the present application, the first ventilation hole is communicated with 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 in the direction of the exhaust hole under the atmospheric pressure of the intake hole, thereby blocking the exhaust hole. At this time, the intake hole is communicated with the first vent hole. 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, which can block the air inlet hole, and the air outlet hole is connected to the first air hole at this time, and the gas in the cuff can be discharged . Therefore, the electronic sphygmomanometer does not need to adopt the traditional solenoid-type solenoid valve structure, and can realize mechanical air intake and exhaust, with low power consumption, small size and simple structure.

Description of drawings

FIG. 1 is a schematic structural diagram 1 of a mechanical two-way valve in Embodiment 1 of the application;

FIG. 2 is a second structural schematic diagram of the mechanical two-way valve in the first embodiment of the application;

3 is a schematic cross-sectional view of the mechanical two-way valve in the first embodiment of the application when it is in an exhaust state;

4 is a schematic cross-sectional view of the mechanical two-way valve in the first embodiment of the application when it is in a gas supply state;

FIG. 5 is a schematic structural diagram 1 of the mechanical two-way valve in the second embodiment of the application;

FIG. 6 is a second structural schematic diagram of the mechanical two-way valve in the second embodiment of the application;

7 is a schematic cross-sectional view of the mechanical two-way valve in the second embodiment of the application when it is in an exhaust state;

8 is a schematic cross-sectional view of the mechanical two-way valve in the second embodiment of the application when it is in a gas supply state;

9 is a schematic structural diagram 1 of a mechanical two-way valve in Embodiment 3 of the present application;

10 is a second structural schematic diagram of the mechanical two-way valve in the third embodiment of the application;

11 is a schematic cross-sectional view of the mechanical two-way valve in the third embodiment of the application when it is in an exhaust state;

12 is a schematic cross-sectional view of the mechanical two-way valve in the third embodiment of the application when it is in a gas supply state;

FIG. 13 is a schematic diagram 1 of an exploded view of the air pump in the first embodiment of the application;

14 is a second exploded schematic view of the air pump in the first embodiment of the application;

15 is a schematic cross-sectional view of the air pump in the first embodiment of the application when the air pump is in an exhaust state;

16 is a schematic cross-sectional view of the air pump in the first embodiment of the application when the air pump is in an air supply state;

17 is a schematic cross-sectional view of the mechanical two-way valve in the electronic sphygmomanometer in the first embodiment of the application when it is in an exhaust state;

18 is a schematic cross-sectional view of the mechanical two-way valve in the electronic sphygmomanometer in the first embodiment of the application when it is in a gas supply state;

FIG. 19 is an equivalent schematic diagram of the electronic sphygmomanometer in the first embodiment of the application.

Embodiments of the present invention

Referring to FIG. 3 and FIG. 4 , the mechanical two-way valve provided in the first embodiment of the present application will now be described. The mechanical two-way valve includes a first casing 1 , a second casing 2 and an elastic member 3 installed between the first casing 1 and the second casing 2 . The connection between the first shell 1 and the second shell 2 is sealed, and an accommodation cavity (not shown) is enclosed between the first shell 1 and the second shell 2 , and the elastic member 3 is surrounded by the first shell 1 And the second shell 2 is clamped and fixed in the accommodating cavity. The first shell 1 is provided with an exhaust hole 11 and a first ventilation hole 12 respectively, and the exhaust hole 11 and the first ventilation hole 12 are respectively communicated with the accommodating cavity; the second shell 2 is provided with an intake hole 21, The air inlet hole 21 communicates with the accommodating cavity. In the initial position state, the elastic member 3 is not deformed. At this time, the elastic member 3 blocks the air inlet hole 21 , and the exhaust hole 11 communicates with the first ventilation hole 12 . When supplying air to the air intake hole 21 , the elastic member 3 is deformed in the direction of the exhaust hole 11 under the action of the pressure of the high pressure air supplied from the air intake hole 21 , and the deformed elastic member 3 seals the exhaust hole 11 at this time. The air inlet hole 21 is connected with the first ventilation hole 12 to realize the air supply of the mechanical two-way valve. When the air supply to the air intake hole 21 is stopped, 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 intake hole 21, and the exhaust hole 11 communicates with the first ventilation hole 12. Realize mechanical exhaust of mechanical two-way valve.

Please refer to FIG. 3 and FIG. 4 , the elastic member 3 is in the shape of a cup, a first air chamber (not shown) is enclosed between the elastic member 3 and the first housing 1 , the exhaust hole 11 and the first ventilation hole 12 are respectively Connected with the first air chamber; a second air chamber (not marked in the figure) is enclosed between the elastic member 3 and the second housing 2 , and the air inlet 21 is communicated with the second air chamber; the second housing 2 is also provided with 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 hole 21, and the pressure in the second air chamber is higher than that in the first air chamber, the elastic member 3 will face the direction of the air outlet hole 11 under the action of the pressure. At this time, the elastic member 3 blocks the exhaust hole 11, the second air 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 second air chamber through the second air hole 22. In a vent hole 12, the air supply of the mechanical two-way valve is realized. When the air supply to the second air chamber is stopped, 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 the initial position under the action of its own elastic force, and the elastic member 3 will inhale the air. The hole 21 is blocked, and the second vent hole 22 disconnects the first air chamber from the second air chamber. At this time, the vent hole 11 communicates with the first vent hole 12 to realize the exhaust of the mechanical two-way valve.

Referring to FIGS. 1 and 2 , a plurality of positioning rods 23 are installed at intervals on the side of the second housing 2 facing the elastic member 3 , and the elastic member 3 correspondingly defines a blind hole 30 through which each positioning rod 23 extends. With this structure, through the cooperation between the positioning rod 23 and the blind hole 30, the rapid positioning and disassembly of the elastic member 3 can be realized, and the disassembly and assembly efficiency thereof can be improved.

Referring to FIG. 13 and FIG. 14 , Embodiment 1 of the present application further provides an air pump 7 . The air pump 7 includes the above-mentioned mechanical two-way valve, one-way valve assembly 4 , piston assembly 5 and driving assembly 6 . 13 and FIG. 15 , the one-way valve assembly 4 includes a one-way valve support seat 41 connected to the second housing 2 , and an intake air intake mounted on the one-way valve support seat 41 and used for intake air, respectively. The umbrella valve 42 and the gas outlet umbrella valve 43 for gas outlet, the gas outlet umbrella valve 43 communicates with the air inlet hole 21 of the mechanical two-way valve, and is used for supplying gas to the mechanical two-way valve.

Please refer to 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 mounted on the piston support seat 51 , the two piston bodies 52 are respectively connected to the intake umbrella The valve 42 and the air outlet umbrella valve 43 are arranged opposite to each other. 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 intake umbrella valve 42 to inhale. The piston support seat 51 is provided with a first through hole 50 which communicates the intake umbrella valve 42 with the outside air. The air intake umbrella valve 42 can inhale the external air through the first through hole 50 , so as to realize the intake and exhaust of the piston assembly 5 . Among them, the two piston bodies 52 can be integrally formed, which is easy to manufacture and has high efficiency. The drive assembly 6 is connected with the piston assembly 5, and is used to drive the two piston bodies 52 in the piston assembly 5 to reciprocate up and down alternately, so that the air outlet umbrella valve 43 supplies air to the mechanical two-way valve, and the air inlet umbrella valve 42 supplies air to the outside world. Inhale. Wherein, the drive assembly 6 can adopt any power structure in the existing air pump structure.

13 and 15 , the drive assembly 6 may include a motor 61 , an eccentric rotor 62 connected with the output shaft of the motor 61 , a connecting shaft 63 mounted on the eccentric rotor 62 at one end, and a transmission vane 64 . The other end of the connecting shaft 63 is connected to the middle position of the transmission blade 64 , and the two ends of the transmission blade 64 are respectively connected to the two piston bodies 52 . With this structure, when the motor 61 works, the motor 61 drives the eccentric rotor 62 to rotate, and the eccentric rotor 62 drives the two ends of the transmission fins 64 to reciprocate up and down alternately through the connecting shaft 63, thereby realizing the alternate up and down reciprocating motion of the two piston bodies 52. . Specifically, when the piston body 52 moves downward, the air inlet umbrella valve 42 of the one-way valve assembly 4 is opened, and the air outlet umbrella valve 43 is closed. At this time, the one-way valve assembly 4 inhales air through the first through hole 50; the piston body 52 moves upward. During movement, the air inlet umbrella valve 42 of the one-way valve assembly 4 is closed, and the air outlet umbrella valve 43 is opened. At this time, the one-way valve assembly 4 compresses air into the mechanical two-way valve through the air inlet hole 21 .

14 and 16, the air pump 7 further includes a motor support base 65 supporting the piston support base 51. The motor support base 65 is provided with a second through hole 650 that communicates with the first through hole 50; the motor support base 65 is connected to the motor The eccentric rotor 62 , the connecting shaft 63 and the transmission blade 64 are arranged in the space enclosed by the piston support base 51 and the motor support base 65 . The motor support base 65 is connected and fixed to the motor 61 through screws 66 . With this structure, the piston support base 51 is supported by the motor support base 65 , so that the movement stability of the piston assembly 5 can be improved. Disposing the eccentric rotor 62 , the connecting shaft 63 and the transmission fins 64 in the space enclosed by the piston support base 51 and the motor support base 65 can improve the working stability of the drive assembly 6 and reduce the volume.

Please refer to FIG. 17 to FIG. 19 , the first embodiment of the present application further 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 outer casing to form the first casing 1, thereby reducing the electronic sphygmomanometer's volume, simplifying the structural design.

Referring to FIG. 19 , the electronic sphygmomanometer includes the above-mentioned air pump 7 , an air pressure sensor 8 communicating with the air outlet 71 of the air pump 7 and a cuff 9 , and the cuff 9 communicates with 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 air outlet 72, the air outlet 71 is the first vent hole 12 in the mechanical two-way valve, and the air outlet 72 is the air outlet 11 in the mechanical two-way valve. When the electronic sphygmomanometer is used for measurement, the air pump 7 works, the elastic member 3 is compressed and deformed to block the exhaust hole 11 (ie the exhaust port 72 of the air pump 7 ), and the first ventilation hole 12 communicates with the air inlet hole 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 air fills the cuff 9 through the air inlet 21 and the first air hole 12 to realize air supply. . When the air pump 7 stops supplying air, the elastic member 3 returns to its original state under the action of the elastic force. At this time, the elastic member 3 blocks the air inlet hole 21, the air outlet hole 11 is communicated with the first air hole 12, and the gas in the cuff 9 can be released. Exhaust through the first vent hole 12 and the exhaust hole 11 to realize mechanical exhaust, without using the traditional solenoid valve structure, low power consumption and small volume.

Referring to FIG. 7 and FIG. 8 , the mechanical two-way valve provided in the second embodiment of the present application will now be 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 above-mentioned first embodiment is that the first housing 1 is further provided with a third vent hole 13 that communicates with the first vent hole 12 . In this structure, the third vent hole 13 is used for connecting with the air pressure sensor 8 for measuring the blood pressure value.

Referring to FIG. 11 and FIG. 12 , the mechanical two-way valve provided in the third embodiment of the present application will now be 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 above-mentioned second embodiment is that the elastic member 3 is in the shape of a sheet, the elastic member 3 is provided with a fourth ventilation hole 31, and the second shell The body 2 is provided with a boss 24 at the position facing 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 as to realize the blockage of the exhaust hole by the elastic member 3 11. The first vent hole 12 is communicated with the air intake hole 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 as to realize that the elastic member 3 blocks the air intake hole 21, the first The vent hole 12 communicates with the exhaust hole 11 . In this structure, the elastic member 3 can divide the accommodating cavity into the first cavity and the second cavity, the exhaust hole 11 and the first ventilation hole 12 are respectively communicated with the first cavity, and the air intake hole 21 and the second cavity are respectively Connected. In the initial position, the elastic member 3 is not deformed. At this time, the fourth ventilation hole 31 is in close contact with the boss 24, and the first chamber and the second chamber are in a disconnected state. 21 is blocked, the exhaust hole 11 is communicated with the first ventilation hole 12, and the exhaust of the mechanical two-way valve can be realized. When air is supplied to the accommodating cavity through the air inlet hole 21, and the air pressure in the second chamber is greater than the air pressure in the first chamber, the elastic member 3 is deformed in the direction of the exhaust hole 11, and the elastic member 3 exhausts the air. The hole 11 is blocked. At this time, the fourth ventilation hole 31 is separated from the boss 24. The fourth ventilation hole 31 connects the first chamber with the second chamber, so that the air inlet hole 21 can be communicated with the first ventilation hole 12. It can realize the air supply of mechanical two-way valve. Moreover, the fourth ventilation hole 31 can be gradually opened as the pressure increases, thereby improving the ventilation efficiency.

Please refer to FIG. 9 and FIG. 11 , the first housing 1 is provided with a first groove 14 at a position facing the boss 24 , the first groove 14 is spaced from the boss 24 , and the fourth ventilation hole 31 is provided on the boss 24 and the first groove 14 . In this structure, the first groove 14 can provide enough space for the deformation of the elastic member 3 , thereby facilitating the separation of the fourth vent hole 31 from the boss 24 and realizing the communication between the first chamber and the second chamber.

Please refer to FIG. 9 and FIG. 11 , the side of the first housing 1 facing the second housing 2 is provided with a second groove 15 , and a second groove 15 is installed in the second groove 15 for abutting with the elastic member 3 to block the exhaust gas The ring 16 of the 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 . The elastic member 3 can be a rigid film sheet, and the ring 16 can be an elastic plastic member.

Claims

A mechanical two-way valve, characterized in that it includes:

a first casing, the first casing is respectively provided with an exhaust hole and a first ventilation hole;

The second casing is connected to the first casing, the second casing is provided with an air inlet hole, the first casing and the second casing enclose an accommodating cavity, and the row The air hole, the first air hole and the air intake hole are respectively communicated with the accommodating cavity;

An elastic piece is installed in the accommodating cavity, the elastic piece is used to block the exhaust hole when deformed by external pressure, so as to communicate the air inlet hole with the first ventilation hole, and use When returning to the original state under the action of elastic force, the air inlet hole is blocked, so as to communicate the exhaust hole with the first air hole.
The mechanical two-way valve according to claim 1, wherein the elastic member is in the shape of a cup, and a first air chamber is enclosed between the elastic member and the first housing, and the exhaust gas The hole and the first ventilation hole are respectively communicated with the first air chamber; a second air chamber is enclosed between the elastic member and the second housing, and the air inlet hole and the second air chamber The second housing is also provided with a second vent hole, and the second vent hole is used to control the communication and disconnection between the first air chamber and the second air chamber.
The mechanical two-way valve according to claim 1, wherein a plurality of positioning rods are installed at intervals on the side of the second housing facing the elastic member, and the elastic member is correspondingly provided with a The blind hole into which the positioning rod extends.
The mechanical two-way valve according to claim 1, wherein a third vent hole communicated with the first vent hole is further opened on the first housing.
The mechanical two-way valve of claim 1, wherein the elastic member is in the shape of a sheet, a fourth ventilation hole is formed on the elastic member, and the second housing is opposite to the fourth ventilation hole. The position of the vent hole is provided with a boss; the boss is used to separate from the fourth vent hole when the elastic member is deformed by external pressure, so as to realize that the elastic member blocks the exhaust hole, and the The first ventilation hole is communicated with the air inlet hole, and is used to block the fourth ventilation hole when the elastic member returns to the original state under the action of elastic force, so as to realize that the elastic member blocks the air inlet hole, The first ventilation hole communicates with the exhaust hole.
The mechanical two-way valve according to claim 5, wherein a first groove is formed on the first casing at a position facing the boss, and the first groove is connected to the boss. The fourth ventilation holes are arranged between the bosses and the first grooves.
The mechanical two-way valve according to claim 5, wherein a second groove is opened on the side of the first casing facing the second casing, and a second groove is installed in the second groove. a ring ring abutting with the elastic piece to block the exhaust hole; one end of the exhaust hole is arranged on the bottom surface of the second groove.
The mechanical two-way valve according to claim 7, wherein the elastic member is a rigid film sheet, and the ring is an elastic plastic member.
An air pump, characterized in that it includes:

The mechanical two-way valve according to any one of claims 1-8;

a one-way valve assembly, connected with the mechanical two-way valve, the one-way valve assembly includes a one-way valve support seat, and an air inlet umbrella valve and an air outlet umbrella valve respectively installed on the one-way valve support seat, the air outlet umbrella valve communicates with the air inlet hole of the mechanical two-way valve;

A piston assembly, the piston assembly includes 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 connected to the intake umbrella valve It is arranged opposite to the air outlet umbrella valve, and the piston support seat is provided with a first through hole that communicates the air inlet umbrella valve with the outside air;

The driving assembly is connected with the piston assembly, and is used for driving the two piston bodies to alternately reciprocate, so that the air outlet umbrella valve supplies air and the air inlet umbrella valve inhales air.
The air pump according to claim 9, wherein the two piston bodies are integrally formed.
The air pump of claim 9, wherein the drive assembly comprises:

transmission fins, two ends of the transmission fins are respectively connected with the two piston bodies;

a connecting shaft, one end of which is connected to the middle of the transmission fin;

an eccentric rotor, connected with the other end of the connecting shaft;

The motor is connected with the eccentric rotor and is used for driving the eccentric rotor to rotate.
The air pump according to claim 11, wherein the driving assembly further comprises a motor support base supporting the piston support base, and a second through hole communicated with the first through hole is opened on the motor support base. The motor support seat is connected with the motor, and the eccentric rotor, the connecting shaft and the transmission fin are arranged in the space enclosed by the piston support seat and the motor support seat.
An electronic sphygmomanometer, characterized in that it includes:

The air pump of any one of claims 9-12;

an air pressure sensor, communicated with the air outlet of the air pump;

The cuff is respectively communicated with the air outlet of the air pump and the air pressure sensor.