Exhaust control mechanism and blood pressure measurement device

Abstract

The invention discloses an exhaust control mechanism and a blood pressure measurement device. The exhaust control mechanism comprises a first cylinder, a division body and a valve core. The division body is arranged in the first cylinder and divides the first cylinder into an upper chamber and a lower chamber. A first air inlet and an exhaust outlet both communicated with the upper chamber are arranged at the upper end of the first cylinder. A second air inlet is arranged at the lower end of the first cylinder. External pressure gases enter the lower chamber through the second air inlet. The valve core is located above the division body, is opposite to the first air inlet, and can move up and down along with the division body. The first air inlet is a counter bore. The diameter of the counter bore is increased along the downward movement of the valve core. In the counter bore, the valve core moves upwardly to block the first air inlet, and moves downwardly to open the first air inlet.The exhaust control mechanism has the advantages that the air outlet is set in the shape of the counter bore, variation of the movement of the valve core to through-flow section can be reduced, and accordingly, an airbag can exhaust the gases stably and evenly by the exhaust control mechanism.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to an exhaust control mechanism and a blood pressure measuring device with the exhaust control mechanism. Background technique [0002] Blood pressure measuring devices (eg, sphygmomanometers) are widely used, and are equipped in hospitals and homes. The use of a blood pressure measuring device to detect blood pressure enables patients to keep abreast of their own blood pressure conditions to guide medication or seek medical treatment. [0003] A blood pressure measuring device in the prior art generally includes a cuff, a booster pump, a controller, a pressure sensor and an exhaust valve. The cuff is used to bind the patient's upper arm, which is equipped with an air bag, the pressurizing pump is connected with the air bag inlet to inflate the air bag, and the exhaust exhaust is connected with the air bag exhaust port to selectively discharge the air bag. Air, the pre...

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Problems solved by technology

[0009] Since the outlet end of the air inlet is a plane, the valve core can only affect the gas flow section in a small stroke (the distance between the valve core and the outlet end determines the gas flow rate), when the pressure in the airbag fluctuates, or the power When the gas pressure provided by the mechanism fluctuates, the valve core can be forced to move, and even a small displacement of the valve core will greatly affect the gas flow section. That is to say, the spool of the exhaust valve with the above structure has poor stability in the face of gas pressure fluctuations, and the ability to restore a proper position is also poor.

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