| CPC A61B 5/02125 (2013.01) [A61B 5/02233 (2013.01); A61B 5/0235 (2013.01); A61B 5/681 (2013.01); A61B 5/02416 (2013.01); A61B 2562/0247 (2013.01)] | 11 Claims |
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1. A blood pressure device, provided for measuring a blood pressure of a cardiovascular system of a user, the blood pressure device comprising:
a first blood pressure measuring device having a first expander and a first sensor, wherein the first expander is capable of being worn on a first position of a wrist of the user and close-fitting the skin of the user in a non-invasive way, so that the first sensor against the skin of the user to obtain a first blood pressure information of the first position;
a second blood pressure measuring device having a second expander and a second sensor, wherein the second expander is capable of being worn on a second position of the wrist of the user and close-fitting the skin of the user in a non-invasive way, so that the second sensor against the skin of the user to obtain a second blood pressure information of the second position; and
a controller electrically coupled to the first blood pressure measuring device and the second blood pressure measuring device so as to control the first expander to adjust tightness between the first expander and the skin of the user and to control the second expander to adjust tightness between the second expander and the skin of the user, and wherein the controller obtains a pulse transit time from the first blood pressure information and the second blood pressure information, and the controller generates at least one blood pressure value based on the pulse transit time;
wherein the first expander and the second expander respectively comprise an actuator, and wherein the actuator of the first expander controls the first expander to be inflated and expanded, and the actuator of the second expander controls the second expander to be inflated and expanded;
wherein each of the actuators comprise a valve device and at least one gas transmission device, and wherein the at least one gas transmission device is disposed on one side of the valve device:
wherein the gas transmission device is a micro pump, comprising:
an inlet plate having at least one inlet hole, at least one convergence channel, and a convergence chamber, wherein the at least one inlet hole is configured to introduce the gas into the micro pump, and wherein the at least one inlet hole correspondingly penetrates the inlet plate and is in communication with the at least one convergence channel, and the at least one convergence channel is in communication with the convergence chamber, so that the gas introduced by the at least one inlet hole is converged at the convergence chamber;
a resonance sheet attached to the inlet plate, wherein the resonance sheet has a perforation, a movable portion, and a fixed portion, and wherein the perforation is disposed at a center portion of the resonance sheet and corresponds to the convergence chamber of the inlet plate, the movable portion is disposed around a periphery of the perforation and corresponds to the convergence chamber, and the fixed portion is disposed around a periphery of the resonance sheet and is attached to the inlet plate; and
a piezoelectric actuator attached to the resonance sheet, wherein the piezoelectric actuator is correspondingly disposed to the resonance sheet;
wherein a chamber space is formed between the resonance sheet and the piezoelectric actuator, so that when the piezoelectric actuator is driven, the gas is guided into the micro pump through the at least one inlet hole of the inlet plate, is converged at the convergence chamber via the at least one convergence channel, flowed through the perforation of the resonance sheet, and then transmitted owing to a resonance effect between the piezoelectric actuator and the movable portion of the resonance sheet.
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