TWI722812B - Blood pressure measurement module - Google Patents

Abstract

A blood pressure measurement module is disclosed and comprises a base, a valve plate, a cover, a miniature pump, a driving circuit board and a pressure sensor. The valve plate is disposed between the base and the cover. The miniature pump is located inside the base. The pressure sensor is disposed on the driving circuit board. An inlet channel of the cover and the pressure sensor are both in communication with an airbag. The miniature pump is driven to pump the airbag, so that the airbag is inflated to press the skin of the user, and the pressure sensor monitors the variety of pressure inside the airbag, thereby to detect the blood pressure of the user.

Description

Blood pressure measurement module

This case relates to a blood pressure measurement module, especially an ultra-thin blood pressure measurement module used in combination with wearable electronic devices or mobile devices.

In recent years, the awareness of personal health care has gradually risen. Therefore, it is hoped that the physical condition of oneself can be detected on a regular basis. However, most of the instruments for detecting physical condition are fixed, and almost all people have to go to a fixed medical service station or It is a hospital. Even if it has home-use testing equipment, it is too large and difficult to carry. In the current society that requires fast speed, it is difficult to meet the needs of users.

Among them, the blood pressure that best reflects the physical condition is none other than blood pressure. Everyone’s blood vessels spread all over the body like a road, and blood pressure is like a road. It is able to understand the state of blood transport. Therefore, if any condition occurs in the body, the blood pressure is the most important. clear.

In view of this, how to provide a device that can accurately measure blood pressure at any time, and can be combined with wearable devices or portable electronic devices, so that users can quickly confirm the blood pressure status anytime, anywhere, is the current need to solve problem.

The main purpose of this case is to provide a blood pressure measurement module to be combined with a portable electronic device or a wearable electronic device, which is convenient for users to carry, and can complete blood pressure measurement without time and location restrictions.

A broad implementation aspect of this case is a blood pressure measurement module, including: a base with a valve bearing area, a accommodating groove area, an air inlet and a through hole, wherein the valve bearing area and the The accommodating groove areas are respectively provided on different surfaces, and the air inlet hole and the penetration hole communicate with the accommodating groove area, and the valve bearing area is provided with a first recessed cavity, and the first recessed cavity penetrates A plurality of first through holes are provided and a first protruding structure is arranged protrudingly, and a gas collecting chamber is recessed in the containing groove area to communicate with the first through holes; a valve plate is provided and carried on the valve Above the load-bearing area, there is a valve hole corresponding to the position of the first protruding structure; a top cover is provided with an air inlet channel and an exhaust hole, which are spaced apart from each other, and the top cover has a set of configuration Surface, cover the valve plate, and recess an intake chamber on the assembly surface corresponding to the intake passage, communicate with the intake passage, and recess on the assembly surface corresponding to the exhaust hole. The exhaust chamber is in communication with the exhaust hole, a communication passage is provided between the intake chamber and the exhaust chamber, and a second protruding structure is protrudingly provided in the exhaust chamber, and The vent hole is located at the center of the second protruding structure, so that the valve plate and the second protruding structure normally abut against each other to form a pre-force action, and the vent hole is closed, and the air inlet channel and blood pressure measurement An airbag connection; a micro pump arranged in the accommodating groove area to cover the air collection chamber; a driving circuit board to cover the accommodating groove area to provide the driving signal of the micro pump for control The driving operation of the micro pump; and a pressure sensor, which is arranged on the driving circuit board and electrically connected, and correspondingly penetrates the through hole of the base, and connects with the gas through the top cover to make gas Pressure detection; wherein, the micro pump is controlled and driven by the drive circuit board to form a gas transmission, allowing the outside air of the base to be introduced into the accommodating tank area from the air inlet hole, and continue to be introduced through the micro pump The gas collection chamber is concentrated, and the gas can push the valve hole of the valve plate to disengage from the first protruding structure. At this time, the gas can pass through the valve hole and be continuously introduced into the air inlet channel of the top cover, Gather into the airbag, make the air The bladder inflates and compresses the user's skin, and the user's blood pressure is detected through the pressure sensor.

1: pedestal

11: Valve bearing area

11a: The first recessed cavity

11b: first through hole

11c: The first protruding structure

11d: convex column

11e: The second recessed cavity

11f: second through hole

12: Housing tank area

12a: Gas collecting chamber

13: Air intake

14: Piercing holes

15: first surface

16: second surface

2: Valve piece

21: Valve hole

22: Positioning perforation

3: top cover

31: intake channel

31a: intake chamber

32: Vent

32a: exhaust chamber

32b: The second protruding structure

33: assembly surface

34: Connecting channel

35: positioning hole

36: shared channel

36a: connecting end

4: Micro pump

41: intake plate

411: Vent

412: Busbar Slot

413: Confluence Chamber

42: Resonance film

421: Hollow Hole

422: movable part

423: fixed part

43: Piezo Actuator

431: Suspended Board

432: Outer Frame

433: Bracket

434: Piezoelectric element

435: gap

436: Convex

44: The first insulating sheet

45: conductive sheet

46: second insulating sheet

47: Chamber space

4a: MEMS pump

41a: First substrate

411a: Inflow hole

412a: The first surface of the substrate

413a: The second surface of the substrate

42a: first oxide layer

421a: Confluence channel

422a: Confluence chamber

43a: second substrate

431a: Silicon wafer layer

4311a: Actuation Department

4312a: Peripheral

4313a: connecting part

4314a: fluid channel

432a: second oxide layer

4321a: Vibration chamber

433a: Silicon layer

4331a: perforation

4332a: Vibration Department

4333a: Fixed part

4334a: third surface

4335a: fourth surface

44a: Piezoelectric component

441a: Lower electrode layer

442a: Piezo layer

443a: insulating layer

444a: upper electrode layer

5: Drive circuit board

6: Pressure sensor

7: Microprocessor

8: Communicator

9: External device

10: Airbag

10a: Balloon catheter

Figure 1 is a three-dimensional schematic diagram of the blood pressure measurement module of the present case.

Figure 2A is an exploded schematic diagram of the blood pressure measurement module of this case.

Figure 2B is an exploded schematic diagram of the blood pressure measurement module of the present invention from another perspective.

Figure 3 is a schematic diagram of the pressure sensor of the blood pressure measurement module set on the drive circuit board in this case.

Figure 4 is a schematic diagram of the valve plate of the blood pressure measurement module set on the base of this case.

Figure 5 is a schematic diagram of the blood pressure measurement module connected to the airbag in this case.

Figure 6A is an exploded schematic diagram of the micro pump of the gas detection module in this case.

Figure 6B is an exploded schematic view of the micro pump of the gas detection module of the present invention from another angle.

Figure 7A is a schematic cross-sectional view of the micro pump of the gas detection module of the present invention.

Figure 7B is a schematic cross-sectional view of another embodiment of the gas detection module of the present invention.

Figures 7C to 7E are schematic diagrams of the operation of the micro pump.

Figure SA is a schematic cross-sectional view of the MEMS pump.

Figure 8B is an exploded schematic diagram of the MEMS pump.

Figures 9A to 9C are schematic diagrams of the action of the MEMS pump.

Figure 10 is a schematic top view of the blood pressure measurement module of this case.

Figure 11 is a schematic cross-sectional view taken along the line AA in Figure 10.

Figure 12 is a schematic cross-sectional view taken along the line BB of Figure 10.

Figure 13 is a schematic cross-sectional view of the CC section line of Figure 10.

Figures 14A and 14B are schematic diagrams of the air intake of the blood pressure measurement module of the present case.

Figure 15 is a schematic diagram of the deflation of the blood pressure measurement module.

Figure 16 is a schematic diagram of another embodiment of the blood pressure measurement module.

Figure 17A is a schematic diagram of the top cover of another embodiment of the blood pressure measurement module.

Fig. 17B is a schematic diagram of another angle of the top cover of another embodiment of the blood pressure measurement module.

Figure 18 is a schematic cross-sectional view of another embodiment of the blood pressure measurement module.

Figure 19 is a schematic diagram of the air intake of another embodiment of the blood pressure measurement module.

Figure 20 is a schematic diagram of another embodiment of the blood pressure measurement module for deflation.

Figure 21 is a schematic diagram of the blood pressure measurement module connected to an external device.

Some typical embodiments embodying the features and advantages of this case will be described in detail in the following description. It should be understood that this case can have various changes in different aspects, all of which do not depart from the scope of the case, and the descriptions and diagrams therein are essentially for illustrative purposes, rather than limiting the case.

Please refer to Figures 1A to 2B. This case provides a blood pressure measurement module, including a base 1, a valve plate 2, a top cover 3, a micro pump 4, a driving circuit board 5 and a pressure Sensor 6.

The base 1 includes a valve bearing area 11, a receiving groove area 12, an air inlet 13, a through hole 14, a first surface 15 and a second surface 16, the first surface 15 and the second surface 16 They are two opposite surfaces, the valve bearing area 11 is located on the first surface 15, the containing groove area 12 is located on the second surface 16, the air inlet 13 and the penetration hole 14 respectively penetrate from the first surface 15 to the second surface 16 and Connected to the accommodating groove area 12, wherein the first valve bearing area 11 has a first recessed cavity 11a, a plurality of first through holes 11b, a first protruding structure 11c, and a plurality of protruding pillars 11d. The cavity 11a is formed recessed from the valve bearing area 11, and a first protruding structure 11c is protrudingly provided in the center of the first recessed cavity 11a, and the first through holes 11b surround the first protruding structure 11c and penetrate to the accommodating groove area 12. The protruding posts 11d are respectively adjacent to the corners of the valve bearing area 11. In addition, the receiving groove area 12 is recessed with a gas collecting chamber 12a, and the gas collecting chamber 12a is communicated with the first through holes 11b.

In addition, the valve bearing area 11 further includes a second recessed cavity 11e, the second recessed cavity 11e is spaced apart from the first recessed cavity 11a, and the second recessed cavity 11e penetrates at least one second through hole 11f, so that the second recessed cavity 11e is spaced apart from the first recessed cavity 11a. The two recessed cavities 11e are connected to the gas collecting chamber 12a through the second through hole 11f, and the passage between the gas collecting chamber 12a and the valve bearing area 11 is increased to accelerate the gas in the gas collecting chamber 12a to the valve bearing area 11 speed.

Please refer to Figures 2A and 4, the valve plate 2 is arranged in the valve bearing area 11, the valve plate 2 has a valve hole 21 and a plurality of positioning perforations 22, the valve hole 21 and the first protruding structure 11c of the valve bearing area 11 Corresponding vertically, the positioning holes 22 respectively correspond to the protrusions 11d and are sleeved on the protrusions 11d.

As shown in Figures 17A and 17B, the top cover 3 has an intake passage 31, an exhaust hole 32, a set of matching surfaces 33, a communication passage 34 and a plurality of positioning holes 35, the intake passage 31 and the row The air holes 32 are arranged at intervals, the assembling surface 33 is covered on the valve plate 2, and the assembling surface 33 is recessed on the periphery of the air inlet passage 31, an air inlet chamber 31a communicating with the air inlet passage 31, and an air inlet chamber 31a in the air outlet 32 The exhaust chamber 32a communicating with the exhaust hole 32 is recessed on the periphery, and a communicating passage 34 is recessed between the intake chamber 31a and the exhaust chamber 32a to connect the intake chamber 31a and the exhaust chamber 32a. In addition, a second protruding structure 32b is protrudingly provided at the edge of the exhaust chamber 32a and the exhaust hole 32; please refer to Figure 12, the valve plate 2 is carried on the valve carrying area 11 and sandwiched between the base 1 and The positioning between the top covers 3 is not offset. At this time, the vent hole 32 is located at the center of the second protruding structure 32b. The second protruding structure 32b will press against the valve plate 2 and close the vent hole 32. Under normal conditions, Form a pre-force effect.

Please refer to Fig. 2A, Fig. 2B and Fig. 11, the positioning holes 35 are respectively located at the four corners of the assembly surface 33 and correspond to the protruding posts 11d of the valve bearing area 11, and are provided for The convex post 11d is sleeved therein.

Please refer to Figures 2B and 5, the top cover 3 also includes a common channel 36, the common channel 36 communicates with the air inlet channel 31 and is integrated, and one end of the common channel 36 extends to the pressure sensor 6 and And the pressure sensor 6 is covered (as shown in Figure 13), and the other end is a connecting end 36a (as shown in Figure 10), which is connected to the airbag 10 to promote the pressure sensor 6 to communicate through the common channel 36 The airbag 10 performs gas pressure detection for further blood pressure measurement.

Please continue to refer to FIG. 2B. The micro pump 4 is disposed in the accommodating groove area 12 and covers the gas collecting chamber 12a, and the driving circuit board 5 covers the accommodating groove area 12, and the driving circuit board 5 is electrically connected to the micro The pump 4 provides a driving signal of the micro pump 4 to control the driving and operation of the micro pump 4. In addition, the pressure sensor 6 is electrically connected to the driving circuit board 5, and correspondingly penetrates the through hole 14 of the base 1, and one end of the pressure sensor 6 penetrates through the top cover 3 and is connected to the airbag 10 Connect (as shown in Figure 5).

Please refer to FIGS. 6A and 6B. The micro pump 4 includes an air inlet plate 41, a resonance sheet 42, a piezoelectric actuator 43, a first insulating sheet 44, a conductive sheet 45, and a second insulating sheet. The structure of the sheet 46 and the like, in which the piezoelectric actuator 43 is arranged corresponding to the resonant sheet 42, and the intake plate 41, the resonant sheet 42, the piezoelectric actuator 43, the first insulating sheet 44, the conductive sheet 45 and the second The insulating sheet 46 and the like are stacked in sequence.

The air inlet plate 41 has at least one vent hole 411, at least one busbar groove 412, and a confluence chamber 413. In this embodiment, the number of vent holes 411 is preferably four, but is not limited thereto. The vent hole 411 penetrates the air inlet plate 41 to allow gas to flow into the micropump 4 from the vent hole 411 under the action of atmospheric pressure. The air inlet plate 41 has at least one busbar groove 412, the number and position of which correspond to the air holes 411 on the other surface of the air inlet plate 41. The number of air holes 411 in this embodiment is 4, which corresponds to the busbar The number of grooves 412 is also four; the confluence chamber 413 is located at the center of the air inlet plate 41, one end of the aforementioned four busbar grooves 412 is connected to the corresponding vent hole 411, and the other end is connected to the air inlet plate 41 The confluence chamber 413 at the center of the vent hole 411 can guide the gas entering the confluence groove 412 from the vent 411 and converge and concentrate to the confluence chamber 413. In this embodiment, the air intake plate 41 has a vent hole 411, a bus bar groove 412 and a bus chamber 413 that are integrally formed.

In some embodiments, the material of the air intake plate 41 can be made of stainless steel, but it is not limited to this. In other embodiments, the depth of the bus chamber 413 is the same as the depth of the bus groove 412, but it is not limited thereto.

The resonant plate 42 is made of a flexible material, but not limited to this, and there is a hollow hole 421 on the resonant plate 42 corresponding to the confluence chamber 413 of the inlet plate 41 and is provided for the gas to pass through . In other embodiments, the resonant sheet 42 may be made of a copper material, but it is not limited to this.

The piezoelectric actuator 43 is assembled by a suspension plate 431, an outer frame 432, at least one bracket 433, and a piezoelectric element 434; the suspension plate 431 has a square shape and can be bent and vibrated. 432 is arranged around the suspension plate 431. At least one bracket 433 is connected between the suspension plate 431 and the outer frame 432 to provide elastic support. The piezoelectric element 434 is also in a square shape and is attached to a surface of the suspension plate 431. Deformation is generated by an applied voltage to drive the suspension plate 431 to bend and vibrate, and the side length of the piezoelectric element 434 is less than or equal to the side length of the suspension plate 431; wherein there are a plurality of gaps 435 between the suspension plate 431, the outer frame 432 and the bracket 433 , The gap 435 is for air to pass through; in addition, the piezoelectric actuator 43 further includes a protrusion 436, which is disposed on the other surface of the suspension plate 431, and is disposed on both surfaces of the suspension plate 431 opposite to the piezoelectric element 434 .

As shown in Figure 7A, the air intake plate 41, the resonant sheet 42, the piezoelectric actuator 43, the first insulating sheet 44, the conductive sheet 45, and the second insulating sheet 46 are stacked in sequence, and the piezoelectric actuator 43 The thickness of the floating plate 431 is less than the thickness of the outer frame 432. When the resonant sheet 42 is stacked on the piezoelectric actuator 43, a gap can be formed between the floating plate 431, the outer frame 432, and the resonant sheet 42 of the piezoelectric actuator 43. Chamber space 47.

Please refer to Figure 7B again. Figure 7B shows another embodiment of the micropump 4. Its components are the same as those of the previous embodiment (Figure 6A). The suspension plate 431 of the electric actuator 43 extends in a direction away from the resonant plate 42 in a stamping manner, and is not connected The outer frame 432 is located at the same level, and its extension distance can be adjusted by the bracket 433, and the bracket 433 and the suspension plate 431 are non-parallel, so that the piezoelectric actuator 43 is convex.

In order to understand the above-mentioned micropump 4 to provide gas transmission output operation mode, please continue to refer to Figure 7C to Figure 7E, please refer to Figure 7C first, after the piezoelectric element 434 of the piezoelectric actuator 43 is applied with a driving voltage The deformation causes the suspension plate 431 to move upwards. At this time, the volume of the chamber space 47 increases, and a negative pressure is formed in the chamber space 47. The gas in the confluence chamber 413 is drawn into the chamber space 47, and the resonance plate 42 Affected by the resonance principle, it is simultaneously driven upwards, which increases the volume of the confluence chamber 413, and because the gas in the confluence chamber 413 enters the chamber space 47, the confluence chamber 413 is also in a negative pressure state. The gas is sucked into the confluence chamber 413 through the vent hole 411 and the bus bar groove 412. Please refer to Fig. 7D again. The piezoelectric element 434 drives the suspension plate 431 to move downward, compressing the chamber space 47. Similarly, the resonant plate 42 is displaced downward by the suspension plate 431 due to resonance, and simultaneously pushes into the chamber space 47. The gas is transported downward through the gap 435 and upward, and the gas is discharged by the micro pump 4. Finally, please refer to Figure 7E. When the suspension plate 431 returns to its original position, the resonance plate 42 is still displaced downward due to inertia. At this time, the resonance plate 42 will cause the gas in the compression chamber space 47 to move to the gap 435 and lift. The volume in the confluence chamber 413 allows the gas to continuously pass through the vent 411 and the confluence groove 412 to converge in the confluence chamber 413, and the gas can be supplied by continuously repeating the micro pumps shown in Figures 7C to 7E above The transmission actuation step enables the micropump to continuously enter the gas from the vent 411 into the flow path formed by the inlet plate 41 and the resonance plate 42 to generate a pressure gradient, and then transport it upward through the gap 435, so that the gas flows at a high speed to reach the micropump 4 for gas transmission. Effect.

Another embodiment of the micropump 4 in this case can be a microelectromechanical pump 4a. Please refer to FIGS. 8A and 8B. The microelectromechanical pump 4a includes a first substrate 41a, a first oxide layer 42a, and a first substrate 41a. Two substrates 43a and a piezoelectric component 44a. The MEMS pump 4a of this embodiment is through semiconductor The epitaxy, deposition, lithography, and etching processes in the process are integrally formed, which should not be disassembled. In order to detail the internal structure, the exploded view shown in Figure 8B is used to describe it in detail.

The first substrate 41a is a silicon wafer (Si wafer) with a thickness ranging from 150 to 400 microns (μm). The first substrate 41a has a plurality of inflow holes 411a, and a first surface 412a of a substrate is finally a second surface of a substrate. 413a. In this embodiment, the number of the inflow holes 411a is four, but it is not limited to this, and each inflow hole 411a penetrates from the second surface 413a to the first surface 412a of the substrate, and the inflow hole 411a In order to improve the inflow effect, the inflow hole 411a is tapered from the second surface 413a to the first surface 412a of the substrate.

The first oxide layer 42a is a silicon dioxide (SiO2) film with a thickness between 10 and 20 microns (μm). The first oxide layer 42a is laminated on the first surface 412a of the first substrate 41a. The oxide layer 42a has a plurality of bus channels 421a and a bus chamber 422a, and the number and positions of the bus channels 421a and the inflow holes 411a of the first substrate 41a correspond to each other. In this embodiment, the number of the confluence channels 421a is also four. One ends of the four confluence channels 421a are respectively connected to the four inflow holes 411a of the first substrate 41a, and the other ends of the four confluence channels 421a are connected to the confluence. In the chamber 422a, after allowing the gas to enter through the inflow holes 411a, the gas flows through the corresponding confluence channel 421a and then converges into the confluence chamber 422a.

The second substrate 43a is a silicon-on-insulating silicon wafer (SOI wafer), which includes a silicon wafer layer 431a, a second oxide layer 432a, and a silicon material layer 433a. The thickness of the silicon wafer layer 431a is between 10 and 20 microns (μm), and has an actuating portion 4311a, an outer peripheral portion 4312a, a plurality of connecting portions 4313a, and a plurality of fluid channels 4314a. The actuating portion 4311a is circular. The outer peripheral portion 4312a has a hollow ring shape and surrounds the periphery of the actuating portion 4311a. A plurality of connecting portions 4313a are respectively located between the actuating portion 4311a and the outer peripheral portion 4312a, and connect the two to provide the function of elastic support. A plurality of fluid channels 4314a are formed around the periphery of the actuating portion 2311a, and are respectively located between the plurality of connecting portions 4313a.

The second oxide layer 432a is a silicon oxide layer with a thickness ranging from 0.5 to 2 micrometers (μm). It is formed on the silicon wafer layer 431a in a hollow ring shape and defines a vibration chamber 4321a with the silicon wafer layer 431a. The silicon material layer 433a has a circular shape and is located on the second oxide layer 432a and is bonded to the first oxide layer 42a. The silicon material layer 433a is a silicon dioxide (SiO2) film with a thickness between 2 and 5 microns (μm). A through hole 4331a, a vibrating portion 4332a, a fixing portion 4333a, a third surface 4334a, and a fourth surface 4335a. The through hole 4331a is formed in the center of the silicon material layer 433a, the vibrating part 4332a is located in the peripheral area of the through hole 4331a, and corresponds to the vibration chamber 4321a perpendicularly, and the fixing part 4333a is the peripheral area of the silicon material layer 433a and is fixed to the second part by the fixing part 4333a. The second oxide layer 432a, the third surface 4334a and the second oxide layer 432a are joined, and the fourth surface 4335a is joined to the first oxide layer 42a; the piezoelectric element 44a is stacked on the actuating portion 4311a of the silicon wafer layer 431a.

The piezoelectric element 44a has a circular shape and includes a lower electrode layer 441a, a piezoelectric layer 442a, an insulating layer 443a, and an upper electrode layer 444a. The lower electrode layer 441a is stacked on the actuating portion 4311a of the silicon wafer layer 431a, and the piezoelectric layer 442a is stacked on the lower electrode layer 441a, and the two are electrically connected through the contact area. In addition, the width of the piezoelectric layer 442a is smaller than the width of the lower electrode layer 441a, so that the piezoelectric layer 442a cannot completely cover the lower electrode layer 441a The insulating layer 443a is stacked on a partial area of the piezoelectric layer 442a and the area of the lower electrode layer 441a that is not shielded by the piezoelectric layer 442a, and finally the insulating layer 443a and the area of the piezoelectric layer 442a that is not shielded by the insulating layer 443a The upper electrode layer 444a is stacked on top to allow the upper electrode layer 444a to contact the piezoelectric layer 442a for electrical connection. At the same time, the insulating layer 443a is used to block the upper electrode layer 444a and the lower electrode layer 441a to avoid direct contact between the two and cause short circuits. .

Please refer to Figures 9A to 9C. Figures 9A to 9C are schematic diagrams of the operation of the microelectromechanical pump 4a. Please refer to FIG. 9A first, when the lower electrode layer 441a and the upper electrode layer 444a of the piezoelectric element 44a receive the driving voltage and the driving signal (not shown) transmitted by the driving circuit board 5, they will be transmitted to the piezoelectric layer 442a After the piezoelectric layer 442a receives the driving voltage and the driving signal, due to the influence of the inverse piezoelectric effect When the sound begins to deform, it will drive the actuating portion 4311a of the silicon wafer layer 431a to start to move. When the piezoelectric element 44a drives the actuating portion 4311a to move upwards to open the distance between the second oxide layer 432a and the second oxide layer 432a. The volume of the vibrating chamber 4321a of the layer 432a will increase, so that a negative pressure is formed in the vibrating chamber 4321a for sucking the gas in the confluence chamber 422a of the first oxide layer 42a through the perforation 4331a. Please continue to refer to Figure 9B. When the actuating portion 4311a is pulled upward by the piezoelectric element 44a, the vibrating portion 4332a of the silicon material layer 433a will move upward due to the principle of resonance. When the vibrating portion 4332a moves upward, it will compress The space of the vibration chamber 4321a and push the gas in the vibration chamber 4321a to move to the fluid channel 4314a of the silicon wafer layer 431a, so that the gas can be discharged upward through the fluid channel 4314a, and the vibration part 4332a moves upward to compress the vibration chamber 4321a. , The volume of the confluence chamber 422a is increased due to the displacement of the vibrating part 4332a, and a negative pressure is formed inside the confluence chamber 422a, which sucks the gas outside the microelectromechanical pump 4a into it through the inflow hole 411a. Finally, as shown in Figure 9C, when the piezoelectric element 44a drives the actuating portion 4311a of the silicon wafer layer 431a to move downward, it pushes the gas in the vibrating chamber 4321a to the fluid channel 4314a and discharges the gas, and the silicon material layer 433a The vibrating portion 4332a is also driven by the actuating portion 4311a to move downward, and the gas in the synchronous compression confluence chamber 422a moves to the vibrating chamber 4321a through the perforation 4331a, and then the piezoelectric component 44a drives the actuating portion 4311a to move upward, The volume of the vibrating chamber 4321a will be greatly increased, and there will be a higher suction force to suck gas into the vibrating chamber 4321a, and then repeat the above actions, so that the piezoelectric component 44a continuously drives the actuating portion 4311a to move up and down and move in conjunction The vibrating part 4332a moves up and down, and by changing the internal pressure of the MEMS pump 4a, it continuously draws and discharges gas, thereby completing the action of the MEMS pump 4a.

Please refer to Figure 14A, the micropump 4 starts to operate, the gas starts to enter from the vent 411 of the micropump 4, and the gas is continuously guided to the gas collection chamber 12a. Please refer to Figure 14B, the gas is continuously delivered to the collection chamber 12a. After the gas chamber 12a, the gas enters the first recessed cavity through the first through hole 11b 11a, it also enters the second recessed cavity 11e through the second through hole 11f, and the gas entering the first recessed cavity 11a and the second recessed cavity 11e will push the valve plate 2 upward and move it toward the top cover 3. Approaching, at this time, the valve plate 2 will abut against the second protruding structure 32b of the exhaust chamber 32a, and at the same time, the exhaust hole 32 will be closed, and at the same time the valve plate 2 will be separated from the first protruding structure of the first recessed cavity 11a 11c, the gas in the second recessed cavity 11e and the first recessed cavity 11a can enter the intake chamber 31a through the valve hole 21, and after the gas enters the intake chamber 31a, it is introduced into the intake passage 31, and finally converges to the airbag 10 (as shown in Figure 5). In this embodiment, after the gas enters the intake passage 31, it first passes through the common passage 36, and then enters the airbag 10 at the connecting end 36a, and then starts to inflate and expand the airbag 10 so that the airbag 10 can be close to the subject. The pressure change of the airbag 10 is detected by the pressure sensor 6 to perform blood pressure measurement.

As shown in Figure 15, after the blood pressure measurement is completed, the micro pump 4 stops operating, so the air pressure in the airbag 10 is higher than the air pressure in the intake chamber 31a, and the air starts to be guided from the airbag 10 to the intake chamber through the intake passage 31 In the chamber 31a, when the gas is delivered to the intake chamber 31a, the valve plate 2 is pushed down, and the valve hole 21 is closed by the first protruding structure 11c. The gas will pass through the communication channel 34 and flow from the intake chamber 31a to The exhaust chamber 32a flows. In addition, when the gas pushes the valve plate 2 downwards, the valve plate 2 separates from the second protruding structure 32b, and is pushed close to fall into the second recessed cavity 11e, and the exhaust chamber 32a It is connected to the exhaust hole 32. After the gas enters the exhaust chamber 32a, it can be discharged from the exhaust hole 32 to release the gas in the airbag 10 to complete the rapid pressure relief operation of the airbag 10.

Please refer to Figure 16. Figure 16 is another embodiment of the blood pressure measurement module in this case. Most of the components in this embodiment are the same as those in the previous embodiment, so it will not be repeated here. The difference lies in the top cover 3. This embodiment The top cover 3 is not provided with a common channel 36; then refer to Figure 18, in the case where the common channel 36 is not provided, the balloon 10 of this embodiment has a balloon catheter 10a, and the balloon catheter 10a communicates with the balloon 10, and Connected to the intake passage 31 of the top cover 3 and cover the pressure sensor 6, the micro pump 4 starts to act, and the gas begins to enter the intake passage 31 (as in the first 19), after the gas passes through the intake passage 31, it enters the balloon 10 through the balloon catheter 10a, causing the balloon 10 to inflate and expand, compress the user’s skin, and confirm the balloon 10 by the balloon catheter 10a through the pressure sensor 6 The internal air pressure changes to detect the user’s blood pressure. After the detection is over, the micropump 4 stops operating, and the gas is guided back to the intake passage 31 from the balloon catheter 10a, and finally discharged from the exhaust hole 32 (as shown in Figure 20). Show), to achieve the effect of rapid deflation and pressure relief.

Finally, please refer to Figure 1. The length of the blood pressure measurement module in this case is between 4mm and 30mm, the width is between 2mm and 16mm, and the height is between 1mm and 8mm, so that the blood pressure measurement module can be Combine with portable electronic devices. In addition, in order to integrate the blood pressure measurement module with a smart watch, its length can be between 24mm and 30mm, the width can be between 14mm and 16mm, and the thickness can be between 6mm and 8mm.

As shown in Fig. 21, the blood pressure measurement module may further include a microprocessor 7 and a communicator 8, which are disposed on the driving circuit board 5. The microprocessor 7 is used to receive the pressure sensor 6 The measurement signal is calculated and converted into information data, and the data data is communicated through the communicator and transmitted to an external device 9 for storage and processing application. The communication transmission is at least one of a wired transmission and a wireless transmission. The device is at least one of a cloud system, a portable device, and a computer system.

To sum up, the blood pressure measurement module seat provided in this case can achieve the effect of rapid exhaust and rapid air intake of the airbag through the base, valve plate and top cover, and the micro-pump can greatly reduce the pumping capacity. The volume allows the blood pressure measurement module to be installed on wearable devices such as smart watches, which is highly industrially usable and progressive.

1: pedestal

3: top cover

5: Drive circuit board

Claims (18)

A blood pressure measurement module includes: A base has a valve bearing area, an accommodating groove area, an air inlet and a through hole, wherein the valve bearing area and the accommodating groove area are respectively provided on different surfaces, and the air inlet and the The through hole communicates with the accommodating groove area, and the valve bearing area is provided with a first recessed cavity, and a plurality of first through holes and a protruding first protruding structure are provided in the first recessed cavity , And a gas collecting chamber is recessed in the accommodating groove area to communicate with the first through holes; A valve plate is arranged and carried on the valve bearing area and is provided with a valve hole corresponding to the position of the first protruding structure; A top cover is provided with an intake passage and an exhaust hole, which are separated from each other, and the top cover has a set of matching surfaces to cover the valve plate, and the matching surface corresponds to the recess at the intake passage An intake chamber communicates with the intake passage, and the assembly surface corresponds to the exhaust hole where an exhaust chamber is recessed, communicates with the exhaust hole, and the intake chamber and the exhaust A communication passage is provided between the chambers, and a second protruding structure is protrudingly provided in the exhaust chamber, and the exhaust hole is located at the center of the second protruding structure to promote the valve plate and the second protruding structure. The protruding structure normally pushes against the top to form a pre-force effect, and closes the exhaust hole, and the air intake channel is connected to an airbag for blood pressure measurement; A micro pump is arranged in the accommodating groove area to cover the gas collection chamber; A driving circuit board, covering the accommodating groove area, providing the driving signal of the micro pump to control the driving operation of the micro pump; and A pressure sensor arranged on the driving circuit board for electrical connection, corresponding to the penetration hole of the base, and connected to the airbag through the top cover; Wherein, the micro pump is driven and operated under the control of the driving circuit board to form a gas transmission, allowing the outside air of the base to be introduced into the accommodating groove area from the air inlet, and continuously introduced into the gas collecting cavity through the micro pump The chamber is concentrated, and the gas can push the valve hole of the valve plate to disengage from the first protruding structure. At this time, the gas can pass through the valve hole and be continuously introduced into the air inlet channel of the top cover, and is collected into the airbag In the process, the airbag is inflated and compressed and the user's skin is compressed, and the user's blood pressure is detected through the pressure sensor. The blood pressure measurement module according to claim 1, wherein the valve bearing area of the base further includes a plurality of protrusions, and the valve plate is provided with a positioning hole corresponding to the positions of the plurality of protrusions, for The corresponding sleeve is placed on the protruding column of the valve bearing area, so that the valve plate is supported on the valve bearing area and positioned without deviation, ensuring that the valve hole corresponds to the position of the first protruding structure. The blood pressure measurement module according to claim 2, wherein the assembly surface of the top cover is further provided with a positioning hole corresponding to a plurality of the protruding post positions, for corresponding to the protruding hole placed in the valve bearing area On the column, the valve sheet is carried on the valve bearing area, and is clamped between the base and the top cover to be positioned without deviation. The blood pressure measurement module according to claim 1, wherein the valve bearing area of the base further includes a second recessed cavity, and at least one second through hole penetrates through the second recessed cavity for It is connected with the gas collection chamber to accelerate the introduction of the gas collected in the gas collection chamber through the valve hole, and then continue to be introduced into the air inlet passage of the top cover to be collected in the airbag. For the blood pressure measurement module described in claim 4, when the micropump stops its driving operation, the gas pressure of the gas collected in the airbag is greater than the gas pressure of the gas collection chamber, and the gas collected in the airbag can be controlled by the inlet The air passage is led out, and pushes the valve hole of the valve plate to keep in conflict with the first protruding structure, and closes the valve hole, and the gas is introduced into the exhaust chamber through the communication passage, and at the same time the gas is introduced to push the valve plate It disengages from the second protruding structure, opens the vent hole, and promotes the gas accumulated in the airbag to be discharged from the top cover through the vent hole, so as to complete the rapid pressure relief operation of the airbag. The blood pressure measurement module according to claim 5, wherein when the rapid pressure relief operation of the airbag is carried out, the valve plate can be pushed close to fall into the second recessed cavity, thereby urging the valve plate and the second convex cavity After the structure is separated, the distance is increased, and the vent hole is opened. The blood pressure measurement module according to claim 1, wherein a common channel is provided on the top cover for communicating with the air inlet channel to form an integral body, and the common channel extends and covers the pressure sensor, and the common channel The channel has a connecting end for connecting with the airbag, and urges the pressure sensor to communicate with the airbag through the common channel for gas pressure detection. The blood pressure measurement module according to claim 1, which further includes a microprocessor and a communicator, arranged on the driving circuit board, and the microprocessor is used for receiving the signal measured by the pressure sensor for calculation It is converted into information data, and the data data is communicated through the communicator and transmitted to an external device for storage, processing and application. The blood pressure measurement module according to claim 8, wherein the communication transmission is at least one of a wired transmission and a wireless transmission. The blood pressure measurement module according to claim 8, wherein the external device is at least one of a cloud system, a portable device, and a computer system. The blood pressure measurement module according to claim 1, wherein the micro pump includes: An air inlet plate having at least one vent hole, at least one busbar groove corresponding to the position of the vent hole, and a bus chamber, the vent hole is used for introducing gas, and the busbar groove is used for guiding the gas introduced from the vent hole to The confluence chamber; A resonance plate having a hollow hole corresponding to the position of the confluence chamber and a movable part around it; and A piezoelectric actuator, which is arranged corresponding to the position of the resonant sheet; Wherein, the air inlet plate, the resonant sheet, and the piezoelectric actuator are stacked in sequence, and a cavity space is formed between the resonant sheet and the piezoelectric actuator for the piezoelectric actuator When the actuator is driven, the gas is introduced from the vent hole of the inlet plate, collected into the confluence chamber through the bus bar groove, and then passed through the hollow hole of the resonance plate, so that the piezoelectric actuator resonates with the The movable part of the sheet resonates to transmit gas. The blood pressure measurement module according to claim 11, wherein the piezoelectric actuator includes: A suspended board, with a square shape, and can be flexurally vibrated; An outer frame arranged around the outer side of the suspension board; At least one bracket is connected between the suspension board and the outer frame to provide elastic support; and A piezoelectric element has a side length that is less than or equal to the side length of the suspension plate, and the piezoelectric element is attached to a surface of the suspension plate to receive a voltage to drive the suspension plate to flexurally vibrate . The blood pressure measurement module according to claim 11, wherein the piezoelectric actuator includes: A suspended board, with a square shape, and can be flexurally vibrated; An outer frame arranged around the outer side of the suspension board; At least one bracket is connected between the suspension board and the outer frame to elastically support the suspension board, and make a surface of the suspension board and a surface of the outer frame form a non-coplanar structure, and make the suspension board A surface maintains a cavity space with the resonance plate; and A piezoelectric element has a side length that is less than or equal to the side length of a suspension plate of the suspension plate, and the piezoelectric element is attached to a surface of the suspension plate for applying a voltage to drive the suspension plate to bend vibration. The blood pressure measurement module according to claim 11, wherein the micro pump further includes a first insulating sheet, a conductive sheet, and a second insulating sheet, wherein the air inlet plate, the resonance sheet, and the piezoelectric actuator The device, the first insulating sheet, the conductive sheet and the second insulating sheet are stacked in sequence. The blood pressure measurement module according to claim 1, wherein the micro pump is a micro-electromechanical pump, including: A first substrate having a plurality of inflow holes, the inflow holes are tapered; A first oxide layer on which the first substrate is stacked; the first oxide layer has a plurality of confluence channels and a confluence chamber, and the confluence channels are connected between the confluence chamber and the inflow holes; A second substrate, coupled to the first substrate, includes: A silicon wafer layer with: The actuating part is round; A peripheral part, in a hollow ring shape, surrounding the periphery of the actuating part; A plurality of connecting parts are respectively connected between the actuating part and the outer peripheral part; and A plurality of fluid channels surround the periphery of the actuating portion and are located between the connecting portions; A second oxide layer formed on the silicon wafer layer, in a hollow ring shape, and defining a vibration chamber with the silicon wafer layer; and A silicon material layer, in a circular shape, located on the second oxide layer and bonded to the first oxide layer, has: A through hole formed in the center of the silicon material layer; A vibrating part located in the peripheral area of the perforation; A fixing part located in the peripheral area of the silicon material layer; and A piezoelectric component is circular and is stacked on the actuating part of the silicon wafer layer. The blood pressure measurement module according to claim 15, wherein the piezoelectric component includes: Lower electrode layer A piezoelectric layer stacked on the bottom electrode layer; An insulating layer laid on part of the surface of the piezoelectric layer and part of the surface of the lower electrode layer; and An upper electrode layer is stacked on the insulating layer and the remaining surface of the piezoelectric layer without the insulating layer for electrical connection with the piezoelectric layer. The blood pressure measurement module described in claim 1 has a length between 4mm and 30mm, a width between 2mm and 16mm, and a height between 1mm and 8mm. The blood pressure measurement module according to claim 17 has a length between 24 mm and 30 mm, a width between 14 mm and 16 mm, and a height between 6 mm and 8 mm.

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