Airbag of an electronic sphygmomanometer and electronic sphygmomanometer

Abstract

The present application provides an airbag for an electronic sphygmomanometer. The airbag includes an outer wall and at least one connecting wall; the outer wall includes a first wall, a peripheral side wall, and a second wall; the first wall and the second wall are disposed opposite to each other; the peripheral side wall connects the periphery of the first wall and the periphery of the second wall, and the first wall, the side wall, and the second wall enclose an air cavity; at least one connecting wall is located in the air cavity, and each connecting wall is connected to at least two of the peripheral side wall, the first wall, and the second wall, and each connecting wall is tensioned when the airbag is in an inflated state. The present application also provides an electronic sphygmomanometer including the airbag. The solution of the present application can improve the accuracy of blood pressure measurement.

Description

Technical Field

[0001] This application relates to the field of medical devices, and particularly to an airbag and an electronic sphygmomanometer for an electronic sphygmomanometer. Background Art

[0002] An electronic sphygmomanometer is a medical device that uses electronic technology and the indirect blood pressure measurement principle to measure blood pressure. The miniaturization of electronic sphygmomanometers increases the portability of the products, making electronic sphygmomanometers suitable for home use and meeting the daily blood pressure measurement needs of families. However, the blood pressure measurement accuracy of miniaturized electronic sphygmomanometers is not high. Summary of the Invention

[0003] This application provides an airbag and an electronic sphygmomanometer for an electronic sphygmomanometer, which can improve the blood pressure measurement accuracy.

[0004] In a first aspect, this application provides an airbag for an electronic sphygmomanometer. The airbag includes an outer wall and at least one connecting wall; the outer wall includes a first wall, a peripheral side wall, and a second wall; the first wall and the second wall are arranged opposite to each other; the peripheral side wall connects the periphery of the first wall and the periphery of the second wall, and the first wall, the peripheral side wall, and the second wall enclose an air chamber; the at least one connecting wall is located in the air chamber, and each connecting wall connects at least two of the peripheral side wall, the first wall, and the second wall, and each connecting wall is tensioned when the airbag is in an inflated state.

[0005] The electronic device may include a processing module, an air pump, and a pressure sensor. Both the air pump and the pressure sensor are communicated with the airbag. The air pump is used to inflate the airbag, and the pressure sensor is used to collect the air pressure in the airbag. The blood pressure measurement principle may be: the air pump inflates the airbag to make the airbag expand and compress the blood vessel. When the airbag expands to a certain extent, it will compress and close the blood vessel, blocking blood flow. When the blood flow is completely blocked, then control the airbag to deflate. At this time, the blood vessel will generate a vibration waveform. This vibration waveform can cause the gas in the airbag to oscillate, and the oscillation waveform of the gas is related to the vibration waveform of the blood vessel. The pressure sensor communicated with the airbag can collect the oscillation waveform signal of the gas and send it to the processing module. The processing module processes the oscillation waveform signal according to the built-in algorithm and can calculate the blood pressure value.

[0006] In a natural state, the airbag can be approximately a flat strip-shaped bag, and the airbag can be wound around the human skin to form an annular area with a certain width. The airbag has a length direction, a width direction, and a thickness direction. When the airbag is wound around the human skin, the contour originally extending along the length direction of the airbag will surround the human skin; the width direction is the width direction of this annular area; the thickness direction is the direction from the human skin to the airbag and the opposite direction. The airbag can be made of a material that is soft and easy to deform but not easy to stretch.

[0007] The first wall and the second wall are respectively located at opposite ends in the thickness direction. When in use, the second wall of the airbag can face the human skin, and the first wall can face away from the human skin. The peripheral side wall can be separated from the first wall or the second wall. When forming the airbag, the peripheral side wall is "stitched" with the first wall and the second wall, and there is a "stitching line" between the peripheral side wall and the first wall and the second wall; alternatively, the peripheral side wall can be integrally connected with the first wall and the second wall, and the peripheral side wall and the first wall and the second wall are smoothly transitioned without a "stitching line". There is at least one connecting wall. A single connecting wall can be connected between the first wall and the second wall, between the first wall and the peripheral side wall, between the second wall and the peripheral side wall, or connect the first wall, the peripheral side wall and the second wall simultaneously. The connecting positions of different connecting walls can be the same or different.

[0008] When the airbag is in an inflated state, the outer wall of the airbag and all the connecting walls are tensioned. Since the connecting wall can pull the corresponding outer wall of the airbag inward when tensioned, reducing or avoiding the outward bulge of the corresponding outer wall, the contour shape of the airbag after inflation can be optimized. This can make more gas in the airbag press against the second wall, acting on the blood vessel more concentratedly, increasing the effective compression area of the airbag on the blood vessel, thereby improving the degree of compression and closure of the blood vessel, and further improving the blood pressure measurement accuracy.

[0009] In one implementation, the peripheral side wall includes opposite first side wall and second side wall; the at least one connecting wall includes a first connecting wall and a second connecting wall; the first connecting wall connects the first side wall and the first wall; one end of the second connecting wall connects the second side wall, and the opposite end connects the first wall or the second side wall.

[0010] The first side wall and the second side wall can be respectively located at opposite ends in the width direction, and both connect the periphery of the first wall and the periphery of the second wall. The first side wall and the second side wall can also be respectively located at opposite ends in the length direction. When the airbag is in the inflated state, since the first side wall is pulled by the first connecting wall, the outward convexity of the first side wall is suppressed. Similarly, the second side wall is pulled by the second connecting wall, so the outward convexity of the second side wall is suppressed. The first wall can be pulled by both the first connecting wall and the second connecting wall, so the outward convexity of the first wall is suppressed; or the first wall is pulled by the first connecting wall and the second wall is pulled by the second connecting wall, so the outward convexities of the first wall and the second wall are suppressed. This structure makes the gas in the airbag press more towards the second wall, acting on the blood vessel more concentratedly, increasing the effective compression area of the airbag on the blood vessel, thereby improving the compression and closing degree of the blood vessel, and further improving the blood pressure measurement accuracy. Moreover, after the airbag deflates, the first side wall at one end in the width direction (or length direction) of the airbag is pulled inwards by the first connecting wall, and the second side wall at the other end in the width direction (or length direction) of the airbag is pulled inwards by the second connecting wall, so that the first side wall and the second side wall will not elongate. Therefore, the airbag will not be extruded outwards, will not affect the aesthetics of the product, nor will it affect the user experience.

[0011] In one implementation, the peripheral side wall includes opposite first and second side walls; the at least one connecting wall includes a first connecting wall and a second connecting wall; the first connecting wall connects the first side wall and the first wall; the second connecting wall connects the first side wall and the second wall. Since the first side wall, the first wall and the second wall are pulled and limited, the blood pressure measurement accuracy can be improved, and the first side wall will not elongate after the airbag deflates, so that the airbag will not be extruded outwards, avoiding affecting the aesthetics of the product and the user experience.

[0012] In one implementation, the at least one connecting wall includes a third connecting wall and a fourth connecting wall; the third connecting wall connects the first side wall and the second wall; the fourth connecting wall connects the second side wall and the second wall. This airbag structure can improve the blood pressure measurement accuracy, and will not elongate after the airbag deflates, so that the airbag will not be extruded outwards, avoiding affecting the aesthetics of the product and the user experience.

[0013] In one implementation, each connecting wall has a first end, a middle part and a second end, and the middle part is located between the first end and the second end; the first end is connected to the first wall, the middle part is connected to the peripheral side wall, and the second end is connected to the second wall. This connecting wall connects the first wall, the peripheral side wall and the second wall at the same time, and can achieve the technical effects of improving the blood pressure measurement accuracy and ensuring that the airbag will not elongate after deflation with a simple structure. This airbag design is simple, easy to manufacture and mass-produce.

[0014] In one implementation, each of the connecting walls has folds, and when the connecting wall is tensioned, the folds are in a stretched state. The fold structure can provide sufficient deformation margin, and can better realize the switching of the first connecting wall between the relaxed state and the tensioned state.

[0015] In one implementation, the at least one connecting wall and the outer wall enclose different chambers, and the adjacent chambers are connected. This design enables gas to flow between the chambers, ensuring normal inflation and deflation of the airbag to meet work needs.

[0016] In one implementation, the periphery of each of the connecting walls is connected to the outer wall; each of the connecting walls is provided with a vent, and the adjacent chambers are connected through the vent. The periphery of each connecting wall is connected to the outer wall of the airbag. This structure can enhance the structural strength of the connecting wall, ensure the pulling force of the connecting wall, and help optimize the contour of the airbag after inflation, thereby improving the accuracy of blood pressure measurement. This design allows each connecting wall to separate the air cavity, so the provision of vents can achieve interconnection between the various chambers of the air cavity, ensuring normal inflation and deflation of the airbag.

[0017] In one implementation, each of the connecting walls is connected to the middle of the first wall or the middle of the second wall. When the connecting wall is connected to the first wall, the connecting wall is connected to the middle of the first wall. Alternatively, when the connecting wall is connected to the second wall, the connecting wall is connected to the middle of the second wall. The center of the first wall or the second wall can be determined. The area between the two sides of the center along the width direction can be called the middle of the first wall or the second wall in the width direction. The area between the two sides can be mirror-symmetric about the center. By connecting the connecting wall to the middle of the first wall or the second wall, a pulling force can be applied at the position where the first wall or the second wall can produce the maximum bulge, ensuring that the first wall or the second wall will basically not bulge, so that the gas in the airbag is pressed more toward the second wall, and the pressure is more concentrated on the blood vessel, increasing the effective compression area of the airbag on the blood vessel, thereby improving the degree of compression and closure of the blood vessel, and then improving the accuracy of blood pressure measurement.

[0018] In a second aspect, the present application provides an electronic sphygmomanometer, comprising an air pump, an air pressure sensor and the airbag; the airbag has an air nozzle connected to the air cavity, and the air pump and the air pressure sensor are both connected to the air cavity through the air nozzle. The air nozzle can be arranged on any of the above-mentioned outer walls. Since the connecting wall of the airbag can pull the corresponding outer wall of the airbag inward when tensioned, the gas in the airbag is pressed more toward the second wall, and the pressure is more concentrated on the blood vessel, increasing the effective compression area of the airbag on the blood vessel, thereby improving the compression and closure degree of the blood vessel. Therefore, the electronic sphygmomanometer with the airbag can measure blood pressure more accurately.

[0019] In one implementation, the air nozzle includes an intake air nozzle and a measurement air nozzle. The air pump is connected to the air chamber through the intake air nozzle, and the air pressure sensor is connected to the air chamber through the measurement air nozzle. By separately providing two air nozzles for inflation and measurement, it is possible to ensure that the various systems of the electronic sphygmomanometer operate without interference, thereby ensuring the working reliability of the electronic sphygmomanometer.

[0020] In one implementation, the electronic sphygmomanometer is an upper arm sphygmomanometer, a wrist sphygmomanometer, or a wearable sphygmomanometer. Such an electronic sphygmomanometer is convenient to carry and suitable for home use. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the scenario of measuring blood pressure with an upper arm sphygmomanometer in an embodiment;

[0022] Figure 2 is a schematic diagram of the scenario of measuring blood pressure with a wrist sphygmomanometer in another embodiment;

[0023] Figure 3 is a three-dimensional structural schematic diagram of a blood pressure watch in another embodiment;

[0024] Figure 4 is a three-dimensional sectional structural schematic diagram of the airbag of the electronic sphygmomanometer in Embodiment 1 when not inflated;

[0025] Figure 5 is Figure 4 a top view structural schematic diagram of the airbag in;

[0026] Figure 6 is Figure 4 a side view structural schematic diagram of the airbag in;

[0027] Figure 7 is a top view structural schematic diagram of the airbag in another embodiment;

[0028] Figure 8 is a top view structural schematic diagram of the airbag in another embodiment;

[0029] Figure 9 is Figure 4 a three-dimensional sectional structural schematic diagram of the airbag after inflation and expansion in;

[0030] Figure 10 is Figure 9 a side view structural schematic diagram of the airbag in;

[0031] Figure 11 is a schematic diagram of the principle of a conventional airbag compressing blood vessels;

[0032] Figure 12 is a schematic diagram of the shape change of a conventional airbag from the inflated state to the deflated state;

[0033] Figure 13 It is a schematic diagram of the principle of the airbag compressing blood vessels in the first embodiment;

[0034] Figure 14 It is a schematic side view structure diagram of the airbag in the second embodiment when not inflated;

[0035] Figure 15 It is Figure 14 a schematic diagram of the principle of the airbag compressing blood vessels after inflation and expansion;

[0036] Figure 16 It is a schematic side view structure diagram of the airbag in the third embodiment when not inflated;

[0037] Figure 17 It is Figure 16 a schematic side view structure diagram of the airbag after inflation and expansion;

[0038] Figure 18 It is a schematic side view structure diagram of the airbag in the fourth embodiment when not inflated;

[0039] Figure 19 It is Figure 18 a schematic side view structure diagram of the airbag after inflation and expansion;

[0040] Figure 20 It is a schematic three - dimensional sectional view structure diagram of the airbag of the electronic sphygmomanometer in the fifth embodiment when not inflated;

[0041] Figure 21 It is Figure 20 a schematic side view structure diagram of the airbag in

[0042] Figure 22 It is Figure 20 a schematic three - dimensional sectional view structure diagram of the airbag after inflation and expansion in

[0043] Figure 23 It is Figure 22 a schematic side view structure diagram of the airbag in

[0044] Figure 24 It is a schematic three - dimensional sectional view structure diagram of the airbag of the electronic sphygmomanometer in the sixth embodiment when not inflated;

[0045] Figure 25 It is Figure 24 a schematic top view structure diagram of the airbag in

[0046] Figure 26 It is Figure 24 a schematic side view structure diagram of the airbag in

[0047] Figure 27 It is Figure 24 a schematic three - dimensional structure diagram of the airbag after inflation and expansion in

[0048] Figure 28 is Figure 27 a schematic side view structure diagram of the airbag in Specific embodiments

[0049] The following embodiments of the present application provide an electronic sphygmomanometer, including but not limited to Figure 1 the arm-type sphygmomanometer 10 shown in Figure 2 the wrist-type sphygmomanometer 20 shown in Figure 3 or the blood pressure watch 30 shown in . The following will be described in detail.

[0050] As Figure 1 shown, the arm-type sphygmomanometer 10 may include a main unit 11, a trachea 12, and a cuff 13. The trachea 12 connects the main unit 11 and the cuff 13. The main unit 11 may include a processing module, a display screen, an air pump, and a barometric pressure sensor. The cuff 13 can be wound and bound around a human arm, and an airbag is encapsulated in the cuff 13. The air pump can inflate the airbag through the trachea 12 to make the airbag expand and compress the blood vessel. When the airbag expands to a certain extent, it will compress and close the blood vessel, blocking blood flow. When the blood flow is completely blocked, then control the airbag to deflate. At this time, the blood vessel will generate a vibration waveform. This vibration waveform can cause the gas in the airbag to oscillate, and the oscillation waveform of the gas is related to the vibration waveform of the blood vessel. The barometric pressure sensor connected to the airbag can collect the oscillation waveform signal of the gas and send it to the processing module. The processing module processes the oscillation waveform signal according to a built-in algorithm (the built-in algorithm includes, for example, the amplitude coefficient method), and can calculate the blood pressure value. The processing module can also control the display screen to display the blood pressure value.

[0051] Figure 2 Schematically shows the main unit 21 and the wristband 23 of the wrist-type sphygmomanometer 20. The wristband 23 can be wound and bound around a human wrist, and an airbag is encapsulated in the wristband 23. The main unit 21 may include a processing module, a display screen, an air pump, and a barometric pressure sensor. Both the air pump and the barometric pressure sensor are connected to the airbag. The blood pressure measurement principle of the wrist-type sphygmomanometer 20 is the same as above, and will not be repeated here.

[0052] Figure 3 Schematically shows the main unit 31 and the watchband 33 of the blood pressure watch 30. The watchband 33 can be wound and bound around a human wrist, and an airbag is encapsulated in the watchband 33. The main unit 31 may include a processing module, a display screen, an air pump, and a barometric pressure sensor. Both the air pump and the barometric pressure sensor are connected to the airbag. The blood pressure measurement principle of the blood pressure watch 30 is the same as above, and will not be repeated here. In other embodiments, in addition to the blood pressure watch 30, the electronic sphygmomanometer may also be other wearable blood pressure monitors (portable blood pressure monitors suitable for long-term wear), such as blood pressure bracelets.

[0053] The airbag structure of the electronic device will be described in detail below.

[0054] As Figure 4 shown, in the first embodiment, in the natural state, the airbag 34 can be approximated as a flat strip-shaped bag, and the airbag 34 can be wound around the arm or wrist to form an annular region with a certain width. The airbag 34 has a length direction, a width direction, and a thickness direction. When the airbag 34 is wound around the arm or wrist, the contour originally extending along the length direction of the airbag 34 will surround the arm or wrist; the width direction is the width direction of the annular region; the thickness direction is the direction from the human skin to the airbag 34 and the opposite direction (for example, in Figure 6 the perspective, the thickness direction is the vertical direction). The airbag can be made of a material that is soft and easily deformable but not easily extensible, such as thermoplastic polyurethane elastomer rubber (TPU) or polyvinyl chloride (PVC).

[0055] As Figures 4 - 6 shown, the airbag 34 has an outer wall, and the outer wall can include a first wall 37, a second wall 40, a first side wall 351, and a second side wall 352. The airbag 34 can also include a first connecting wall 392 and a second connecting wall 391.

[0056] The first wall 37 and the second wall 40 are disposed opposite to each other, and the two are respectively located at opposite ends in the thickness direction. In use, the second wall 40 of the airbag 34 can face the human skin, and the first wall 37 can face away from the human skin. The shapes of the first wall 37 and the second wall 40 are not limited, for example, they can be approximately strip-shaped. An air inlet nozzle 36 and a measurement nozzle 38 can be provided on the first wall 37. The air pump is communicated with the air inlet nozzle 36, and the pressure sensor is communicated with the measurement nozzle 38.

[0057] In other embodiments, the air inlet nozzle 36 and the measurement nozzle 38 are independent of each other, and their respective positions can be determined according to the product requirements. The two are not limited to being provided on the same wall. For example, one of the air inlet nozzle 36 and the measurement nozzle 38 can be provided on the first side wall 351 described below, and the other can be provided on the second side wall 352 described below; or, both the air inlet nozzle 36 and the measurement nozzle 38 can be provided on the first side wall 351 or the second side wall 352. Or, only one nozzle can be provided on the first wall 37, and both the air pump and the pressure sensor are communicated with the nozzle. Or, the nozzle can also be provided at other positions, such as the peripheral side wall described below. The pressure sensor can also be provided at the measurement nozzle 38 or the nozzle, rather than being included in the main body.

[0058] The first side wall 351 and the second side wall 352 are disposed opposite to each other, and the first side wall 351 and the second side wall 352 are respectively located at opposite ends in the width direction. The first side wall 351 and the second side wall 352 are both connected to the peripheries of the first wall 37 and the second wall 40.

[0059] As Figure 5As shown, the airbag 34 may further include a side wall 41 at one end in the length direction, and a side wall opposite to the side wall 41 and at the other end in the length direction (in Figure 5 this side wall is cut off by the cross-section and not shown). The side wall 41 and this side wall are also connected to the peripheries of the first wall 37 and the second wall 40. The side wall 41, the first side wall 351, this side wall, and the second side wall 352 are connected end to end to form the peripheral side wall of the airbag 34. This peripheral side wall may be separated from the first wall 37 or the second wall 40, and when forming the airbag 34, this peripheral side wall is "stitched" to the first wall 37 and the second wall 40, and there is a "stitching line" between this peripheral side wall and the first wall 37 and the second wall 40; alternatively, this peripheral side wall may be integrally connected with the first wall 37 and the second wall 40, and there is a smooth transition between this peripheral side wall and the first wall 37 and the second wall 40, without a "stitching line".

[0060] Refer to Figure 4 and Figure 6 As shown, the first wall 37, the peripheral side wall, and the second wall 40 enclose an air chamber S. The intake nozzle 36 is communicated with this air chamber S so that an air pump can inflate this air chamber S. The measurement nozzle 38 is also communicated with this air chamber S so that a pressure sensor can collect the oscillating waveform signal of the gas in the airbag 34.

[0061] As Figures 4 - 6 shown, the first connecting wall 392 may be approximately in the shape of a long strip. The first connecting wall 392 is located in this air chamber S and is connected between the first side wall 351 and the first wall 37. The opposite ends of the first connecting wall 392 in the length direction are also respectively connected to the side wall 41 and this side wall. That is, the periphery of the first connecting wall 392 is connected to the outer wall of the airbag 34.

[0062] The connection positions of the first connecting wall 392 on each outer wall may be located in the middle of the corresponding outer wall. As Figure 4 and Figure 6 shown, the first connecting wall 392 may be connected to the middle of the first side wall 351 in the thickness direction. The center of the first side wall 351 can be determined. The area between the two sides of this center in the thickness direction can be called the middle in the thickness direction. The two side areas can be mirror-symmetrical about this center, and the width of each side area can be set as needed. The first connecting wall 392 may be connected to the middle of the first wall 37 in the width direction. Similarly, the center of the first wall 37 can be determined. The area between the two sides of this center in the width direction can be called the middle in the width direction. The two side areas can be mirror-symmetrical about this center, and the width of each side area can be set as needed. In other embodiments, the connection positions of the first connecting wall 392 on each outer wall can be determined according to the product requirements, not limited to the middle of the corresponding outer wall.

[0063] The periphery of the first connecting wall 392 is connected to the outer wall of the airbag 34 to divide the air chamber S into different chambers. For exampleFigure 6 As shown, the first connecting wall 392 can divide a chamber S1 from the air chamber S.

[0064] As Figures 4 - 6 shown, the second connecting wall 391 can be approximately strip-shaped. The second connecting wall 391 is located in the air chamber S and is connected between the second side wall 352 and the first wall 37. The opposite ends of the second connecting wall 391 in the length direction are also respectively connected to the side wall 41 and the side wall. That is, the periphery of the second connecting wall 391 is connected to the outer wall of the airbag 34.

[0065] The connecting positions of the second connecting wall 391 on each outer wall can be located in the middle of the corresponding outer wall. For example Figure 6 shown, the second connecting wall 391 can be connected to the middle of the second side wall 352 in the thickness direction, and the second connecting wall 391 can be connected to the middle of the first wall 37 in the width direction. In other embodiments, the connecting positions of the second connecting wall 391 on each outer wall can be determined according to the product requirements, not limited to the middle of the corresponding outer wall.

[0066] The periphery of the second connecting wall 391 is connected to the outer wall of the airbag 34, dividing the air chamber S into different chambers. For example Figure 6 shown, the second connecting wall 391 can divide a chamber S3 from the air chamber S, and the second connecting wall 391 and the first connecting wall 392 can divide a chamber S2 from the air chamber S. That is, by designing the first connecting wall 392 and the second connecting wall 391, the air chamber S can be divided into chamber S1, chamber S2 and chamber S3.

[0067] Combined with Figures 4 - 6 shown, in order to connect different chambers so that the airbag 34 can be fully inflated when inflated, a plurality of ventilation holes 39a can be opened on both the first connecting wall 392 and the second connecting wall 391, and the ventilation holes 39a are all through holes. The ventilation holes 39a on the first connecting wall 392 connect chamber S1 and chamber S2, and the ventilation holes 39a on the second connecting wall 391 connect chamber S2 and chamber S3. The shape and number of the ventilation holes 39a are not limited and can be designed according to the product requirements.

[0068] Combined with Figure 4 and Figure 7 shown, in another embodiment, different from the first embodiment: the first connecting wall 392 is connected between the first wall 37 and the first side wall 351, but the opposite ends of the first connecting wall 392 in the length direction are not connected to the peripheral side wall of the airbag 34, but are both spaced from the peripheral side wall by a distance G. For example Figure 7As shown, the right end of the first connecting wall 392 along the length direction is not connected to the side wall 41 of the peripheral side wall, but maintains a gap G with the side wall 41. That is, only a part of the edge area of the first connecting wall 392 is connected to the outer wall of the airbag 34. Since the first connecting wall 392 does not separate the air cavity, the first connecting wall 392 does not need to be provided with a vent hole.

[0069] Combination Figure 4 and Figure 7 As shown, in another embodiment, the second connecting wall 391 is connected between the first wall 37 and the second side wall 352, but the two opposite ends of the second connecting wall 391 along the length direction are not connected to the side of the airbag 34, but are spaced apart from the peripheral side wall by a gap G. Figure 7 As shown, the right end of the second connecting wall 391 along the length direction is not connected to the side wall 41 of the peripheral side wall, but maintains a gap G with the side wall 41. That is, only a part of the edge area of the second connecting wall 391 is connected to the outer wall of the airbag 34. The second connecting wall 391 may also be provided with no ventilation holes.

[0070] Or in another embodiment, Figure 8 As shown, there may be a plurality of first connecting walls 392 (for example, 3), and the plurality of first connecting walls 392 are arranged side by side, with a gap G between each two adjacent first connecting walls 392. Each first connecting wall 392 is connected between the first wall 37 and the first side wall 351, but at least one end along the length direction is not connected to the peripheral side wall of the airbag 34. For example, the right end of a first connecting wall 392 at the left end is not connected to the peripheral side wall of the airbag 34, the left end of a first connecting wall 392 at the right end is not connected to the peripheral side wall of the airbag 34, and both the left and right ends of the middle first connecting wall 392 are not connected to the peripheral side wall of the airbag 34. Of course Figure 8 The figure is only an example, for example, the opposite ends of each first connecting wall 392 may not be connected to the peripheral side wall of the airbag 34. Since such first connecting wall 392 does not separate the air cavity, the first connecting wall 392 may not be provided with a vent hole.

[0071] In another embodiment, if Figure 8 As shown, there may be several (for example, 3) second connecting walls 391, and the several second connecting walls 391 are arranged side by side, with a gap G between each two adjacent second connecting walls 391. Each second connecting wall 391 is connected between the first wall 37 and the second side wall 352, but at least one end along the length direction is not connected to the peripheral side wall of the airbag 34. For example, the right end of a second connecting wall 391 at the left end is not connected to the peripheral side wall of the airbag 34, the left end of a second connecting wall 391 at the right end is not connected to the peripheral side wall of the airbag 34, and both the left and right ends of the middle second connecting wall 391 are not connected to the peripheral side wall of the airbag 34. Of course Figure 8The above is only an example. For example, the opposite ends of each second connecting wall 391 may not be connected to the peripheral side wall of the airbag 34. Since such a second connecting wall 391 does not partition the air chamber, ventilation holes may not be provided on the first connecting wall 392.

[0072] Figures 4 - 8 The airbag 34 in is not inflated, and the above-mentioned outer walls of the airbag 34, the first connecting wall 392, and the second connecting wall 391 are all in a relaxed state. As Figure 9 and Figure 10 shown, when the airbag 34 is inflated and expanded, the above-mentioned outer walls, the first connecting wall 392, and the second connecting wall 391 will all be tensioned. This tension is to be tightened to form a certain shape and will not easily bend and deform. Since the first side wall 351 is pulled by the first connecting wall 392, and the connecting position of the first connecting wall 392 on the first side wall 351 is located in the middle of the first side wall 351, the first side wall 351 will basically not bulge outward. Similarly, the second side wall 352 is pulled by the second connecting wall 391, and the connecting position of the second connecting wall 391 on the second side wall 352 is located in the middle of the second side wall 352, so the second side wall 352 will basically not bulge outward. The first wall 37 is simultaneously pulled by the first connecting wall 392 and the second connecting wall 391, and the connecting position of the first connecting wall 392 on the first wall 37 and the connecting position of the second connecting wall 391 on the first wall 37 are both located in the middle of the first wall 37, so the first wall 37 will also basically not bulge outward. Since the second wall 40 is not pulled, it can bulge outward slightly.

[0073] Figure 11 FIG. is a schematic diagram of the principle of a conventional airbag 100 pressing on a blood vessel 300 in a human tissue 200 during inflation. Since the conventional airbag 100 only has an outer wall, in the inflated state, the conventional airbag 100 will form an elliptical cross-section, and the lower wall close to the human skin bulges outward to form an arc. Such a geometric structure results in that the effective compression length X1 (the length of the part of the blood vessel 300 that is compressed and closed) of the blood vessel 300 is much smaller than the width X0 of the conventional airbag 100, so that the pressure exerted by the conventional airbag 100 on the blood vessel 300 is limited and the blood vessel 300 cannot be fully compressed and closed, thereby causing a decrease in the measurement accuracy of blood pressure.

[0074] And as Figure 12 shown, after the conventional airbag 100 deflates, the opposite ends in its width direction will relax and elongate, which will cause the conventional airbag 100 to squeeze the cuff, wristband or watchband, affecting both the aesthetics of the product and causing discomfort to the user.

[0075] On the contrary, as Figure 13As shown, since the airbag 34 of the first embodiment has the first connecting wall 392 and the second connecting wall 391, it can optimize the outer contour of the airbag 34 after inflation, restrict the gas in the airbag 34 from flowing towards the first wall 37, the first side wall 351 and the second side wall 352, and enable the gas to press more towards the second wall 40, so that the pressure acts more concentratedly on the blood vessel 300. In comparison Figure 13 with Figure 11 it can be seen that Figure 13 the effective compression length X2 of the blood vessel 300 in Figure 11 is greater than the effective compression length X1 in Figure 6 . Since the pressure exerted by the airbag 34 on the blood vessel 300 is increased, the compression closure degree of the blood vessel 300 can be improved, and thus the measurement accuracy of blood pressure can be enhanced. Moreover, as shown in

[0076] After the airbag 34 of the first embodiment deflates, the first side wall 351 at one end in the width direction of the airbag 34 is pulled inward by the first connecting wall 392, and the second side wall 352 at the other end in the width direction of the airbag 34 is pulled inward by the second connecting wall 391, so that the first side wall 351 and the second side wall 352 will not elongate. Therefore, the airbag 34 will not squeeze the cuff, wristband or watchband, will not affect the aesthetics of the product, nor will it affect the user experience.

[0077] In other embodiments, the first connecting wall 392 can connect the first side wall 351 and the second wall 40, and / or the second connecting wall 391 connects the second side wall 352 and the second wall 40. Or, there can be only one of the first connecting wall 392 and the second connecting wall 391, and the first connecting wall 392 or the second connecting wall 391 can connect any two outer walls of the airbag.

[0077] As shown in Figure 14 and Figure 15 , in the second embodiment, different from the above first embodiment, one end of the second connecting wall 391 is connected to the second side wall 352 and the other end is connected to the second wall 40. Since the second wall 40 is also pulled by the second connecting wall 391, the outward convexity of the second wall 40 during inflation of the airbag 34 can be suppressed, making the second wall 40 flatter, so that the effective compression length X3 of the blood vessel 300 can be increased (the effective compression length X3 can be greater than the above effective compression length X2), and the compression area of the airbag 34 can be increased. Therefore, the pressure exerted by the airbag 34 on the blood vessel 300 can be further increased, making the compression closure of the blood vessel 300 more sufficient, thereby enhancing the blood pressure measurement accuracy.

[0078] As shown in Figure 16 and Figure 17As shown, in the third embodiment, different from the above first embodiment, the first connecting wall 392 is connected between the first wall 37 and the first side wall 351, and the second connecting wall 391 is connected between the first side wall 351 and the second wall 40. One end of the first connecting wall 392 and one end of the second connecting wall 391 may meet on the first side wall 351 or may be separated. Since the first wall 37, the first side wall 351, and the second wall 40 are all pulled and limited, the outward convexity of the three is restricted when the airbag 34 expands. The second side wall 352 is not connected to the first connecting wall 392 and the second connecting wall 391, and the second side wall 352 can slightly protrude outward. However, according to the principle described above, the airbag 34 can still generally make the gas press more towards the second wall 40, so as to concentrate the pressure on the blood vessel more, improve the compression and closing degree of the blood vessel, and thus improve the measurement accuracy of blood pressure. Moreover, the first side wall 351 will not slacken and elongate when the airbag 34 deflates, so the first side wall 351 will not squeeze the cuff, wristband or watchband, and will not affect the aesthetics of the product.

[0079] As Figure 18 and Figure 19 shown, in the fourth embodiment, based on the solution of the above first embodiment, the airbag 34 may further include a third connecting wall 393. The third connecting wall 393 is connected between the first side wall 351 and the second wall 40. One end of the third connecting wall 393 and one end of the first connecting wall 392 may meet on the first side wall 351 or may be separated. Since the first wall 37, the second side wall 352, the second wall 40, and the first side wall 351 are all pulled and limited, the outer contour of the airbag 34 after expansion is further optimized, so that the gas can press more towards the second wall 40, concentrate the pressure on the blood vessel more, thereby further improving the compression and closing degree of the blood vessel and further improving the measurement accuracy of blood pressure. Moreover, the first side wall 351 and the second side wall 352 will not elongate when the airbag 34 deflates, so the airbag 34 will not squeeze the cuff, wristband or watchband, and can ensure the aesthetics of the product and the user experience.

[0080] As Figure 20 and Figure 21 shown, in the fifth embodiment, based on the solution of the above fourth embodiment, the airbag 34 may further include a fourth connecting wall 394. The fourth connecting wall 394 is connected between the second side wall 352 and the second wall 40. One end of the fourth connecting wall 394 and one end of the second connecting wall 391 may meet on the second side wall 352 or may be separated. The other end of the fourth connecting wall 394 and one end of the third connecting wall 393 may be separated or may meet on the second wall 40.

[0081] As Figure 22 and Figure 23As shown, when the airbag 34 is inflated, since the first wall 37, the second side walls 352, the second wall 40, and the first side wall 351 are all pulled and limited, the outer contour of the airbag 34 after inflation is greatly optimized, enabling more gas to be pressed against the second wall 40, concentrating the pressure more on the blood vessel, thereby further improving the degree of compression and closure of the blood vessel and further enhancing the measurement accuracy of blood pressure. Moreover, when the airbag 34 deflates, the first side wall 351 and the second side wall 352 will not elongate, so the airbag 34 will not squeeze the cuff, wristband, or watchband, ensuring the aesthetics of the product and the user experience.

[0082] As Figures 24 - 26 shown, in the sixth embodiment, different from the above embodiments, the first connecting wall 392 of the airbag 34 connects the first wall 37, the first side wall 351, and the second wall 40, and the second connecting wall 391 of the airbag 34 connects the first wall 37, the second side wall 352, and the second wall 40. The following will be described in detail.

[0083] As Figure 26 shown, the first connecting wall 392 may have a number of folds (similar to the fan surface of a folding fan). The first connecting wall 392 may have a first end 392a, a middle portion 392b, and a second end 392c, and the middle portion 392b is connected between the first end 392a and the second end 392c. The first end 392a is connected to the first wall 37, the middle portion 392b is connected to the first side wall 351, and the second end 392c is connected to the second wall 40. The second connecting wall 391 may also have a number of folds. The second connecting wall 391 may have a first end 391a, a middle portion 391b, and a second end 391c, and the middle portion 391b is connected between the first end 391a and the second end 391c. The first end 391a is connected to the first wall 37, the middle portion 391b is connected to the second side wall 352, and the second end 391c is connected to the second wall 40. In other embodiments, at least one of the first connecting wall 392 and the second wall 40 may only connect the first wall 37 and the second wall 40.

[0084] As Figure 26 shown, by providing the first connecting wall 392 and the second connecting wall 391 in the air chamber of the airbag 34, the air chamber can be divided into chambers S4, S5, S6, S7, and S8. To communicate the chambers S4 to S8 with each other, ventilation holes may be provided in the regions of the first connecting wall 392 between the first end 392a and the middle portion 392b, the regions of the first connecting wall 392 between the middle portion 392b and the second end 392c, the regions of the second connecting wall 391 between the first end 391a and the middle portion 391b, and the regions of the second connecting wall 391 between the middle portion 391b and the second end 391c.

[0085] Similarly to the above description, in other embodiments, the first connecting wall 392 may be one or a plurality of them arranged side by side at intervals. At least one end of the single first connecting wall 392 in the length direction may be spaced from the peripheral side wall of the airbag 34, that is, at least a partial edge region of the first connecting wall 392 is not connected to the outer wall of the airbag 34. Since such a first connecting wall 392 does not partition the air chamber, vent holes may not be provided on the first connecting wall 392. The second connecting wall 391 may have a design similar to that of the first connecting wall 392, and vent holes may not be provided on the second connecting wall 391 either.

[0086] As Figure 27 and Figure 28 shown, when the airbag 34 is inflated and expanded, the folds on the first connecting wall 392 and the second connecting wall 391 will unfold, causing the first connecting wall 392 and the second connecting wall 391 to be tensioned. The fold structure can provide sufficient deformation margin and can better achieve the switching between the relaxed state and the tensioned state of the first connecting wall 392. In other embodiments, the folds are not necessary. For example, when the airbag 34 deflates, the first connecting wall 392 and the second connecting wall 391 can curl naturally.

[0087] Since the first wall 37, the second side wall 352, the second wall 40, and the first side wall 351 are all pulled and limited, the outer contour of the airbag 34 after expansion is greatly optimized, enabling more gas to be pressed against the second wall 40 and concentrating the pressure more on the blood vessel 300, thereby further improving the compression and closing degree of the blood vessel 300 and further enhancing the measurement accuracy of blood pressure. Moreover, when the airbag 34 deflates, the first side wall 351 and the second side wall 352 will not elongate, so the airbag 34 will not squeeze the cuff, wristband, or watchband, ensuring the aesthetics and user experience of the product.

[0088] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claimed rights.

Claims

1. An airbag of an electronic sphygmomanometer, characterized in that the airbag includes an outer wall and at least one connecting wall; the outer wall includes a first wall, a peripheral side wall and a second wall; the first wall and the second wall are arranged opposite to each other, and the second wall is used for contacting the skin; the peripheral side wall connects the periphery of the first wall and the periphery of the second wall, and the first wall, the peripheral side wall and the second wall enclose an air chamber; the at least one connecting wall is located in the air chamber, each connecting wall is connected to the peripheral side wall, and is connected to at least one of the first wall and the second wall, and each connecting wall is tensioned when the airbag is in an inflated state.

2. The airbag according to claim 1, characterized in that the peripheral side wall includes a first side wall and a second side wall that are opposite to each other; the at least one connecting wall includes a first connecting wall and a second connecting wall; the first connecting wall connects the first side wall and the first wall; one end of the second connecting wall is connected to the second side wall, and the opposite end is connected to the first wall or the second wall.

3. The airbag according to claim 1, characterized in that the peripheral side wall includes a first side wall and a second side wall that are opposite to each other; the at least one connecting wall includes a first connecting wall and a second connecting wall; the first connecting wall connects the first side wall and the first wall; the second connecting wall connects the first side wall and the second wall.

4. The airbag according to claim 3, characterized in that the at least one connecting wall includes a third connecting wall and a fourth connecting wall; the third connecting wall connects the first side wall and the second wall; the fourth connecting wall connects the second side wall and the second wall.

5. The airbag according to claim 1, characterized in that each connecting wall has a first end, a middle part and a second end, and the middle part is located between the first end and the second end; the first end is connected to the first wall, the middle part is connected to the peripheral side wall, and the second end is connected to the second wall.

6. The airbag according to claim 5, characterized in that each connecting wall has a fold, and the fold is in a stretched state when the connecting wall is tensioned.

7. The airbag according to any one of claims 1-6, characterized in that the at least one connecting wall and the outer wall enclose different chambers, and adjacent chambers communicate with each other.

8. The airbag according to claim 7, characterized in that the periphery of each connecting wall is connected to the outer wall; each connecting wall is provided with a ventilation hole, and adjacent chambers communicate through the ventilation hole.

9. The airbag according to any one of claims 1-8, characterized in that each connecting wall is connected to the middle part of the first wall or the middle part of the second wall.

10. An electronic sphygmomanometer, characterized in that it includes an air pump, a pressure sensor and the airbag according to any one of claims 1-9; the airbag has a nozzle communicating with the air chamber, and both the air pump and the pressure sensor communicate with the air chamber through the nozzle.

11. The electronic sphygmomanometer according to claim 10, characterized in that The nozzle includes an intake nozzle and a measurement nozzle. The air pump is communicated with the air cavity through the intake nozzle, and the air pressure sensor is communicated with the air cavity through the measurement nozzle.

12. The electronic sphygmomanometer according to claim 10 or 11, characterized in that The electronic sphygmomanometer is an upper arm sphygmomanometer, a wrist sphygmomanometer or a wearable sphygmomanometer.

Images