CN209195660U - A kind of passive valve type sphygmomanometer of microminiature fills exhaust apparatus - Google Patents

Abstract

The utility model relates to a kind of passive valve type sphygmomanometers of microminiature to fill exhaust apparatus, it include: lower case, piezoelectric vibrator, inlet valve, outlet valve, characterized by further comprising upper housing, exhaust end, diaphragms, in which: the lower case, piezoelectric vibrator, inlet valve, outlet valve and upper housing lower end constitute the air charging system of electronic sphygmomanometer；The upper housing upper end, diaphragm and exhaust end constitute the exhaust apparatus of electronic sphygmomanometer.The utility model relates to a kind of microminiature sphygmomanometer fill exhaust apparatus may be implemented be powered inflation with power-off be vented, the device is using piezoelectric vibrator as driving element simultaneously, with tradition have many advantages, such as check valve fill exhaust apparatus compared with, have structure simply, be easy to be miniaturized.

Description

A kind of passive valve type sphygmomanometer of microminiature fills exhaust apparatus

Technical field

The utility model belongs to sphygmomanometer accessory, and in particular to a kind of passive valve type sphygmomanometer of microminiature fills exhaust apparatus.

Background technique

Electronic sphygmomanometer used at present mainly uses electromagnetic diaphragmpump principle to pressurize, and used diaphragm pump is at least Including reciprocating diaphragm, motor or electromagnet, as the major mechanical driving part of sphygmomanometer, during miniaturization It has difficulties.With the appearance of the portable wrist strap sphygmomanometer of the third generation, air charging system, which is difficult to minimize, has become limit product The main problem of development and user experience.

Summary of the invention

It is difficult to minimize to solve the problems, such as that current electronic sphygmomanometer fills exhaust apparatus, it is passive to propose a kind of microminiature Valve type sphygmomanometer fills exhaust apparatus, this, which fills exhaust apparatus, may be implemented be powered inflation and the function of powering off exhaust, utilizes piezoresistive material The Piezoelectric Driving diaphragm constituted is expected as power source, by gas from gas distribution channel sucking and from row under the action of Piezoelectric Driving power Stomata extrudes.The device, as driving element, combines to form gas pumpability, phase with import and export valve using piezoelectric vibrator Compare and piezoelectric vibrator and special flow passage is combined to realize the device of gas pumpability, has output pressure high, compare more traditional tool Have check valve fill exhaust apparatus with structure it is simple, be easy to be miniaturized, can better meet the small of third generation sphygmomanometer Type demand.

To achieve the goals above, the utility model uses following technical scheme:

A kind of passive valve type sphygmomanometer of microminiature of the utility model fills exhaust apparatus, comprising: lower case, enters piezoelectric vibrator Mouth valve, outlet valve, it is characterised in that further include upper housing, exhaust end, diaphragm, in which: the first circle is disposed in the lower case Shape deep gouge is disposed with the second round deep gouge on the first round deep gouge bottom surface, is disposed on the described second round deep gouge bottom surface Venthole and venthole, the piezoelectric vibrator are pasted on circular substrate that constitute and be arranged in first round heavy by piezoelectric ceramic piece At slot, the inlet valve and outlet valve are arranged at venthole and venthole, and the upper housing lower surface arrangement has and side Wall surface is connected to the inlet channel of rectangle deep gouge and the flow channels of round deep gouge, and arrangement is with circle on the top surface of the upper housing The diaphragm deep gouge of deep gouge, gas distribution channel of the arrangement with round deep gouge, the gas distribution channel and mistake on diaphragm deep gouge bottom surface The side arrangement of circulation road connection, the upper housing is connected to the transfer port of boss and with gas distribution channel, the inlet channel Opposite with the inlet valve on venthole, the flow channels are opposite with the outlet valve on venthole, the lower case and upper housing Lower end seal installation, the diaphragm with vent is arranged in the diaphragm deep gouge, and the decompression bore dia is much smaller than Remaining each overflow section makes its two sides have apparent pressure difference, discharge chamber of the arrangement with round deep gouge, institute on the exhaust end The disposed inboard for stating discharge chamber has the gas vent of boss, and the upper end of the upper housing and exhaust end sealing are installed.

When work, transfer port is connect with air bag.Apply alternating voltage at the two poles of the earth of piezoelectric vibrator, so that piezoelectric vibrator generates Periodic bending deformation, when piezoelectric vibrator is downward, the pump chamber volume that the second round deep gouge is constituted with piezoelectric vibrator becomes larger, and pumps Chamber air pressure reduces, and gas enters venthole by inlet channel, so that inlet valve is opened, gas enters pump chamber；Work as piezoelectric vibrator When upward, pump chamber volume becomes smaller, and pump intracavity gas is compressed, and air pressure increases, so that outlet valve is opened.When piezoelectric vibrator is powered When, gas is discharged from outlet valve, and due to the effect of vent, diaphragm and the inflation cavity pressure that gas distribution channel is constituted are big, discharge chamber Pressure is small, and under the action of pressure difference, diaphragm blocks gas vent, and gas flows through gas distribution channel, into transfer port, to electronic sphygmomanometer Air bag inflation；When piezoelectric vibrator stops applying voltage, air pressure is reduced in pump chamber, and outlet valve is closed, in air bag and inflatable chamber Remaining gas enters discharge chamber by vent, and under the action of pressure difference, there are gap, blood pressures for the end face of diaphragm and gas vent The gas counted in air bag is discharged by gas vent.

Detailed description of the invention

Fig. 1 is that a kind of passive valve type sphygmomanometer of microminiature of the utility model fills exhaust apparatus diagrammatic cross-section.

Fig. 2 is the section signal that a kind of passive valve type sphygmomanometer of microminiature of the utility model fills upper housing in exhaust apparatus Figure.

Fig. 3 is that a kind of passive valve type sphygmomanometer of microminiature of the utility model fills exhaust apparatus 3-D view.

Specific embodiment

Referring to FIG. 1, FIG. 2 and FIG. 3, a kind of passive valve type sphygmomanometer of microminiature of the present invention fills exhaust apparatus, comprising: lower case 1, piezoelectric vibrator 2, inlet valve 3, outlet valve 4, it is characterised in that further include upper housing 5, exhaust end 6, diaphragm 7, in which: under described It is disposed with the first round deep gouge 10 on shell 1, the second round deep gouge 11 is disposed on the described first 10 bottom surface of round deep gouge, it is described It is disposed with venthole 12 and venthole 13 on second 11 bottom surface of round deep gouge, the piezoelectric vibrator 2 is pasted by piezoelectric ceramic piece 22 It constitutes and is arranged at the first round deep gouge 10 on circular substrate 21, the inlet valve 3 and outlet valve 4 are arranged in ventilation At hole 12 and venthole 13,5 lower surface arrangement of upper housing has the inlet channel 51 that rectangle deep gouge is connected to side wall surface and circle The flow channels 52 of shape deep gouge, diaphragm deep gouge 54 of the arrangement with round deep gouge, the diaphragm are heavy on the top surface of the upper housing 5 Gas distribution channel 53 of the arrangement with round deep gouge, the gas distribution channel 53 are connected to flow channels 52 on 54 bottom surface of slot, it is described on The side arrangement of shell 5 has the transfer port 55 of boss and is connected to gas distribution channel 53, the inlet channel 51 and venthole 12 On inlet valve 3 it is opposite, the flow channels 52 are opposite with the outlet valve 4 on venthole 13, the lower case 1 and upper housing 5 Lower end seal installation, the diaphragm 7 with vent 71 is arranged in the diaphragm deep gouge 54, cloth on the exhaust end 6 The discharge chamber 61 with round deep gouge is set, the disposed inboard of the discharge chamber 61 has the gas vent 62 of boss, the upper housing 5 Upper end and exhaust end 6 sealing install.

When work, transfer port 55 is connect with air bag.Apply alternating voltage at the two poles of the earth of piezoelectric vibrator 2, so that piezoelectric vibrator 2 Periodic bending deformation is generated, when piezoelectric vibrator 2 is downward, the pump housing of the second round deep gouge 11 and the composition of piezoelectric vibrator 2 Product becomes larger, and pump chamber air pressure reduces, and gas enters venthole 12 by inlet channel 51, so that inlet valve 3 is opened, gas enters pump Chamber；When piezoelectric vibrator 2 is upward, pump chamber volume becomes smaller, and pump intracavity gas is compressed, and air pressure increases, so that outlet valve 4 is beaten It opens.When piezoelectric vibrator 2 is powered, gas is discharged from outlet valve 4, due to the effect of vent 71, diaphragm 7 and 53 structure of gas distribution channel At inflation cavity pressure it is big, 61 pressure of discharge chamber is small, and under the action of pressure difference, diaphragm 7 blocks gas vent 62, and gas flows through gas transmission It is inflated into transfer port 55 to the air bag of electronic sphygmomanometer in channel 53；When piezoelectric vibrator 2 stops applying voltage, gas in pump chamber Pressure drop is low, and outlet valve 4 is closed, and in air bag and the remaining gas of inflatable chamber passes through vent 71 and enters discharge chamber 61, in pressure difference Under effect, there are gap, the gas in air bag of sphygmomanometer is discharged by gas vent 62 for the end face of diaphragm 7 and gas vent 62.

Claims (1)

1. a kind of passive valve type sphygmomanometer of microminiature fills exhaust apparatus, comprising: lower case (1), piezoelectric vibrator (2), inlet valve (3), outlet valve (4), it is characterised in that further include upper housing (5), exhaust end (6), diaphragm (7), in which: the lower case (1) On be disposed with the first round deep gouge (10), the second round deep gouge (11), institute are disposed on described first round deep gouge (10) bottom surface It states and is disposed with venthole (12) and venthole (13) on second round deep gouge (11) bottom surface, the piezoelectric vibrator (2) is made pottery by piezoelectricity Tile (22), which is pasted onto, to be constituted and is arranged on circular substrate (21) at the first round deep gouge (10), the inlet valve (3) and out Mouth valve (4) is arranged at venthole (12) and venthole (13), and upper housing (5) lower surface arrangement has and side wall surface connects Lead to the inlet channel (51) of rectangle deep gouge and the flow channels (52) of round deep gouge, arranges band on the top surface of the upper housing (5) There is the diaphragm deep gouge (54) of round deep gouge, gas distribution channel of the arrangement with round deep gouge on diaphragm deep gouge (54) bottom surface (53), the gas distribution channel (53) is connected to flow channels (52), and the side arrangement of the upper housing (5) has the gas transmission of boss It hole (55) and is connected to gas distribution channel (53), the inlet valve (3) on the inlet channel (51) and venthole (12) is relatively, described Relatively, the lower end of the lower case (1) and upper housing (5) seals outlet valve (4) in flow channels (52) and venthole (13) Installation, the diaphragm (7) with vent (71) are arranged in the diaphragm deep gouge (54), arrange on the exhaust end (6) Discharge chamber (61) with round deep gouge, the disposed inboard of the discharge chamber (61) have a gas vent (62) of boss, it is described on The upper end of shell (5) and exhaust end (6) sealing are installed.