Cuff and sphygmomanometer

Abstract

The present disclosure relates to a ring-shaped air bag and a sphygmomanometer, wherein the ring-shaped air bag comprises an inner ring, an outer ring, support pieces and a sensor. The inner ring and the outer ring seal to form a ring-shaped air bag with a cavity and a hollow part. In the deflated state of the ring-shaped air bag, the inner ring and the outer ring are in close contact. In the inflated state of the ring-shaped air bag, the circumference of the outer ring changes within a first preset range, the circumference of the inner ring changes within a second preset range, and wrinkles are formed on the surface of the inner ring. The support pieces are multiple, and the multiple support pieces are arranged in parallel and staggered on the inner ring along the circumference of the inner ring, so that the wrinkles formed on the surface of the inner ring are regularly distributed and cannot pass through up and down in the inflated state of the ring-shaped air bag. By arranging the support pieces, the wrinkles passing through up and down on the inner ring in the same direction as the blood flow of the upper arm part cannot be formed, the area of the inner ring in contact with the upper arm part is ensured to be an effective pressurization area, the blood flow can be normally blocked, and a true and accurate blood pressure value can be obtained.

Description

Technical Field

[0001] This disclosure relates to the field of medical device technology, and in particular to a ring-shaped airbag and a blood pressure monitor. Background Technology

[0002] Electronic blood pressure monitors based on Korotkoff sounds measure blood pressure by the sound of blood hitting blood vessels. During measurement, a cuff is wrapped around the upper arm, and an external inflation device inflates the bladder inside the cuff. As the bladder inflates, it continuously applies pressure to the upper arm until the blood vessels are compressed and blood flow is blocked. Once blood flow is confirmed to be blocked, the bladder is deflated until blood flow resumes through the compressed blood vessel, producing a pulsating flow. The pressure inside the bladder corresponding to the first and last Korotkoff sounds during the decompression process is defined as systolic and diastolic blood pressure, respectively. However, the inventors discovered that for arm-type blood pressure monitors, inaccurate blood pressure measurements, especially with diastolic blood pressure readings being too high, can occur. Summary of the Invention

[0003] To overcome the problems existing in the related technologies, this disclosure provides a ring-shaped airbag and a blood pressure monitor.

[0004] According to a first aspect of the present disclosure, an annular airbag is provided for blood pressure measurement. The annular airbag includes an inner ring, an outer ring, support plates, and a sensor. The inner ring and the outer ring are sealed to form an annular airbag having a cavity and a hollow portion. When the annular airbag is not inflated, the inner ring and the outer ring are in contact. When the annular airbag is inflated, the circumference of the outer ring varies within a first preset range, and the circumference of the inner ring varies within a second preset range, forming wrinkles on the surface of the inner ring. The first preset range is smaller than the second preset range. There are multiple support plates, which are parallel and staggered along the circumference of the inner ring, such that the wrinkles formed on the surface of the inner ring when the annular airbag is inflated are regularly distributed and cannot be vertically continuous. The sensor is disposed on the side of the inner ring facing the hollow portion.

[0005] In some embodiments, the support sheet is a strip-shaped soft plastic sheet, and the sum of the hardness of the strip-shaped soft plastic sheet and the hardness of the inner ring that contacts the strip-shaped soft plastic sheet is greater than the hardness of the inner ring.

[0006] In some embodiments, the support piece is disposed on the side of the inner ring facing and / or away from the cavity.

[0007] In some embodiments, the plurality of support pieces include at least a first row of support pieces, a second row of support pieces, and a third row of support pieces that are staggered and parallel to the end edge of the inner ring. The first row of support pieces is disposed above the circumferential center line of the inner ring, the second row of support pieces is symmetrically disposed at a position adapted to the sensor, and the third row of support pieces is disposed below the circumferential center line of the inner ring. The first row of support pieces, the second row of support pieces, and the third row of support pieces are staggered in the longitudinal direction of the inner ring.

[0008] In some embodiments, the step of making the folds formed on the surface of the inner ring when the annular airbag is inflated regularly distributed and not vertically connected includes: when the annular airbag is inflated, the formation position of the folds is limited by two adjacent support pieces and any two folds cannot be connected in a longitudinal direction parallel to the axial direction of the inner ring.

[0009] In some embodiments, the circumferential center line of the inner ring is equidistant from the upper edge and the lower edge of the inner ring.

[0010] In some embodiments, the upper and lower edges of the annular airbag are respectively provided with an equal number of pleated positioning parts, and the multiple pleated positioning parts are misaligned with the adjacent support pieces. When the annular airbag is inflated, two adjacent pleated positioning parts and one adjacent support piece form an inflatable bulge area in the cavity. The multiple inflatable bulge areas are symmetrically and misaligned along the circumferential midline, so that pleats are formed between two adjacent inflatable bulge areas. No two pleats can be connected in a longitudinal direction parallel to the axial direction of the inner ring.

[0011] In some embodiments, the pleat positioning part is a structure that fits the end edge of the inner ring with the end edge of the outer ring at symmetrical positions.

[0012] In some embodiments, there are two sensors, and the support plate arranged symmetrically at each sensor includes a curved structure for avoiding the sensor.

[0013] In some embodiments, the annular airbag includes multiple air ports, which are equally spaced on the outer ring and communicate with the cavity to form an air passage for inflating and deflating the annular airbag.

[0014] In some embodiments, the annular airbag is formed by folding and hot-pressing a flexible sheet along its wide side, and folding the first long side of the flexible sheet along the first surface of the flexible sheet towards the second long side of the flexible sheet, and then pressing the second long side together with the first long side. A first annular groove is formed on the upper edge of the annular airbag, and a second annular groove is formed on the lower edge of the annular airbag. The first annular groove and the second annular groove are respectively in a fitted state when the annular airbag is not inflated, and are respectively in an extended state when the annular airbag is inflated.

[0015] In some embodiments, the annular airbag includes a first flexible sheet, a second flexible sheet, and a third flexible sheet. The first flexible sheet and the second flexible sheet are stacked, and the end faces of the first flexible sheet and the second flexible sheet are connected by the third flexible sheet to form a first annular groove and a second annular groove, respectively. The first flexible sheet, the second flexible sheet, and the third flexible sheet form a cavity for inflation. The first annular groove and the second annular groove are respectively in a fitted state when the annular airbag is not inflated, and are respectively in an extended state when the annular airbag is inflated.

[0016] According to a second aspect of the present disclosure, a blood pressure monitor is provided, comprising the annular airbag described in any one of the first aspects above.

[0017] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: Support plates are disposed on the inner ring, so that when the annular airbag is inflated, no wrinkles appear in the area of ​​the inner ring where the support plates are located, and the areas where wrinkles appear are located between any two support plates. By displacing and arranging multiple support plates parallel to each other along the circumference of the inner ring, the wrinkles of the inner ring are offset axially, meaning that the wrinkles formed on the surface of the inner ring are regularly distributed and cannot extend vertically. Since vertically extending wrinkles consistent with the blood flow direction of the upper arm cannot be formed on the inner ring, the area where the inner ring contacts the upper arm is an effective pressure area, allowing blood flow to be normally blocked to obtain a true and accurate blood pressure value. Furthermore, in another embodiment of this disclosure, multiple pleated positioning parts of equal number are provided at offsets on the two ends of the annular airbag. The pleated positioning parts and the support plate further define the inflation bulge area when the annular airbag is inflated. The pleats are staggered between two adjacent inflation bulge areas, so that the annular airbag cannot have vertically continuous pleats in the longitudinal direction consistent with the blood flow direction of the upper arm. In other words, no two pleats can form a straight line in the longitudinal direction, which ensures that the blood flow is normally blocked by the inflated annular airbag during measurement, thereby improving the accuracy of blood pressure measurement based on Korotkoff sound method of arm-type blood pressure monitor.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0020] Figure 1 This is a schematic diagram of the structure of an annular airbag in an uninflated state according to an exemplary embodiment.

[0021] Figure 2 This is a schematic diagram illustrating the position of a support piece in an annular airbag according to an exemplary embodiment.

[0022] Figure 3 This is a schematic diagram illustrating the arrangement of support plates in an annular airbag according to an exemplary embodiment.

[0023] Figure 4 yes Figure 3 A top view showing the arrangement of the central support plates.

[0024] Figure 5 This is a schematic diagram of the structure of an annular airbag in an inflated state according to an exemplary embodiment.

[0025] Figure 6 This is a top view of an annular airbag in an inflated state, according to an exemplary embodiment.

[0026] Figure 7 This is a cross-sectional view of an annular airbag in an inflated state, according to an exemplary embodiment.

[0027] Figure 8 This is a cross-sectional view of the first annular groove according to an exemplary embodiment.

[0028] Figure 9 This is a cross-sectional view of the second annular groove according to an exemplary embodiment.

[0029] Figure 10 This is a front view of the first side of a flexible sheet according to an exemplary embodiment.

[0030] Figure 11 This is a second front view of a flexible sheet according to an exemplary embodiment. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0032] In related technologies, the annular bladder of an arm-type blood pressure monitor is fixed inside the arm tube, and the arm tube secures the outer ring of the annular bladder. During blood pressure measurement, the upper arm is inserted into the arm tube, allowing the inner ring of the annular bladder to fit over the upper arm. When the annular bladder is inflated, the expansion causes the inner ring to press tightly against the upper arm, applying pressure. The circumference of the inner ring depends on the thickness of the upper arm; the thinner the upper arm, the smaller the circumference of the inner ring. Because the inner and outer rings have different circumferences, some areas within the inner ring may form wrinkles during inflation. These wrinkles may extend vertically along the inner ring's longitudinal direction. This vertical extension of the wrinkles can be understood as the wrinkles extending axially through both ends of the annular bladder. When the wrinkles extend axially through both ends of the annular bladder, the wrinkled area cannot contact the upper arm, preventing the corresponding blood vessels from being compressed and blocked. To compress and block blood flow to the blood vessels corresponding to the area not in contact with the upper arm, the inflation pressure of the circular airbag needs to be continuously increased to increase the volume of the inflated areas on both sides of the fold, thereby reducing the size of the fold and ultimately compressing and blocking the blood flow to the corresponding blood vessels. However, increasing the inflation pressure of the circular airbag can lead to an overall higher systolic and diastolic blood pressure reading during the deflation process, resulting in inaccurate blood pressure measurements.

[0033] To address the aforementioned technical problems, this disclosure provides a ring-shaped airbag and a blood pressure monitor. The ring-shaped airbag, by setting multiple support plates in its inner ring to limit the positions of the folds, ensures that the folds on the inner ring are regularly distributed and not vertically continuous. This allows the inner ring of the airbag to effectively fit the upper arm and effectively block blood flow, thereby improving the accuracy of blood pressure measurement and obtaining a true and reliable blood pressure value.

[0034] Figure 1 This is a schematic diagram of the structure of an annular airbag 10 in an uninflated state according to an exemplary embodiment. Figure 2 This is a schematic diagram showing the position of the support piece 3 in an annular airbag 10 according to an exemplary embodiment. Figure 5 This is a schematic diagram of the structure of an annular airbag 10 in an inflated state according to an exemplary embodiment. Figure 6 This is a top view of an annular airbag 10 in an inflated state, according to an exemplary embodiment. Figure 7 This is a cross-sectional view of an annular airbag 10 in an inflated state, according to an exemplary embodiment. Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 As shown, the annular airbag 10 includes an inner ring 1, an outer ring 2, a support plate 3, and a sensor 4. The inner ring 1 and the outer ring 2 are sealed to form an annular airbag 10 with a cavity and a hollow portion. The outer ring 2 surrounds the outer side of the inner ring 1, and the cavity formed is located between the inner ring 1 and the outer ring 2. The cavity is used for inflation to inflate the annular airbag 10. The hollow portion is the hollow area enclosed by the inner ring 1, and the hollow portion is used for insertion of the upper arm.

[0035] In this embodiment, after the upper arm is inserted into the hollow part, the inner ring 1 wraps around the upper arm when the annular airbag 10 is inflated. The sensor 4 located on the side of the inner ring 1 facing the hollow part can be attached to the upper arm and obtain the blood pressure value.

[0036] like Figure 1 and Figure 2 As shown, in the uninflated state of the annular airbag 10, the inner ring 1 and the outer ring 2 are in contact.

[0037] like Figures 5 to 7 As shown, when the annular airbag 10 is inflated, the circumference of the outer ring 2 varies within a first preset range. The circumference of the inner ring 1 varies within a second preset range.

[0038] Understandably, the inner ring 1 and outer ring 2 are made of soft material. When the annular airbag 10 is not inflated, the outer ring 2 fits snugly against the inner ring 1, meaning that the circumference of the outer ring 2 is equal to that of the inner ring when the annular airbag 10 is not inflated. When the annular airbag 10 is inflated, since the outer ring 2 is outside the inner ring 1, the outer ring 2 expands outward, meaning that the circumference of the outer ring 2 increases, while the inner ring 1 expands inward, meaning that the circumference of the inner ring 1 decreases.

[0039] For example, the first preset range is the difference between L2 and L, where L2 is the circumference of the outer ring 2 when the annular airbag 10 is inflated, and L is the circumference of the outer ring 2 when the annular airbag 10 is not inflated. The second preset range is the difference between L and P2, where L is the circumference of the inner ring 1 when the annular airbag 10 is not inflated, and P2 is the circumference of the inner ring 1 when the annular airbag 10 is inflated. The inner ring 1 and the outer ring 2 are made of the same material, that is, the inner ring 1 and the outer ring 2 have the same extensibility. During the inflation of the annular airbag 10, the outer ring 2 gradually expands outward, and the circumference of the outer ring 2 increases from L to L2. However, due to the limitation of the extensibility of the outer ring 2, the circumference of the outer ring 2 does not continue to increase after reaching L2. At this point, since the inner ring 1, located inside the outer ring 2, can form folds 62, after the circumference of the outer ring 2 increases to L2, the inner ring 1 can continue to expand inward until it fits tightly against the upper arm, at which point the circumference of the inner ring 1 reaches P2. Therefore, when the inner ring 1 and the outer ring 2 have the same extensibility, or when the arm cylinder fixes the outer ring 2 of the annular airbag 10, the difference between L2 and L is necessarily less than the difference between L and P2, that is, the first preset range is less than the second preset range.

[0040] In this embodiment, a support piece 3 is provided on the inner ring 1 so that wrinkles 62 will not form in the area covered by the support piece 3 on the inner ring 1. Furthermore, there are multiple support pieces 3, such that any wrinkles 62 formed on the inner ring 1 are located between any two support pieces 3.

[0041] In this design, the length direction of multiple support plates 3 is the same as the circumferential direction of the inner ring 1, and they are located in different circumferential directions of the inner ring 1. When the annular airbag 10 is inflated, the folds 62 between any two support plates 3 can be located in different axial directions of the inner ring 1 without affecting the compression of blood vessels. Furthermore, in the axial direction of the inner ring 1, the support plates 3 are staggered relative to each other, so that when the annular airbag 10 is inflated, the folds 62 formed on the surface of the inner ring 1 are regularly distributed and cannot be vertically connected. That is, two adjacent support plates 3 limit the formation position of the folds 62, and any two folds 62 formed cannot be connected in a direction parallel to the axial direction of the inner ring 1. By staggering the arrangement of the folds 62 formed on the inner ring 1 in the axial direction of the annular airbag 10, i.e., preventing the formation of vertically connected folds 62 on the inner ring 1 that are consistent with the blood flow direction of the upper arm, it is ensured that the area of ​​the inner ring 1 in contact with the upper arm is an effective pressure area, and the folds 62 not in contact with the upper arm cannot provide flow space for blood flow. Therefore, the annular airbag 10 of this embodiment can normally block blood flow to obtain a true and accurate blood pressure value.

[0042] In this embodiment, the support sheet 3 is a strip-shaped soft plastic sheet. The support sheet 3 is made of a relatively soft material, which facilitates the formation of the inflatable bulge area 61 and has a certain degree of wrinkle resistance.

[0043] In this embodiment of the disclosure, the sum of the hardness of the strip soft plastic sheet and the hardness of the inner ring 1 in contact with the strip soft plastic sheet is greater than the hardness of the inner ring 1, so as to ensure that wrinkles 62 will not form in the area covered by the support sheet 3 on the inner ring 1.

[0044] In this embodiment, the support piece 3 is disposed on the side of the inner ring 1 facing the cavity to ensure that the support piece 3 will not directly contact the upper arm during the inflation of the annular airbag 10, thereby improving user comfort.

[0045] In some embodiments, the support piece 3 is disposed on the side of the inner ring 1 away from the cavity, that is, the support piece 3 does not need to be disposed inside the cavity, and the support piece 3 can be directly attached to the surface of the inner ring 1, which is convenient for processing and preparation.

[0046] In some embodiments, multiple support pieces 3 are respectively disposed on the side of the inner ring 1 away from the cavity and on the side of the inner ring 1 facing the cavity. The multiple support pieces 3 can be arranged in pairs opposite each other, with the two opposite support pieces 3 located on opposite sides of the inner ring 1, to increase the rigidity of the area covered by the support pieces 3 on the inner ring 1 and prevent wrinkles 62 from forming in the area covered by the support pieces 3. Alternatively, the multiple support pieces 3 can be staggered and distributed on both sides of the inner ring 1, so that wrinkles formed by the limiting cannot penetrate vertically in a direction parallel to the axial direction of the annular airbag 10.

[0047] Figure 3 This is a schematic diagram illustrating the arrangement of support pieces 3 in an annular airbag 10 according to an exemplary embodiment. Figure 4 yes Figure 3 A top view showing the arrangement of the three support plates in the middle. (See attached image.) Figures 2 to 4 As shown in the embodiments of this disclosure, the plurality of support pieces 3 include at least a plurality of rows of support pieces 3 that are staggered and parallel to the end edges of the inner ring 1. For example, the plurality of rows of support pieces 3 may include three rows of support pieces, referred to as the first row of support pieces 31, the second row of support pieces 32, and the third row of support pieces 33, respectively.

[0048] The first row of support pieces 31 is positioned above the circumferential center line of the inner ring 1. The second row of support pieces 32 are symmetrically positioned to mate with the sensor 4. The third row of support pieces 33 is positioned below the circumferential center line of the inner ring 1. In other words, the first row of support pieces 31 and the third row of support pieces 33 are located on opposite sides of the circumferential center line of the inner ring 1. The distance between the circumferential center line of the inner ring 1 and its upper and lower edges is equal. The upper and lower edges of the inner ring 1 are opposite ends of the inner ring 1 in the axial direction. Figure 2As shown, the first annular groove 52 and the second annular groove 51 are formed by the two sealed ends of the inner ring 1 and the outer ring 2, respectively, with the upper end being the first annular groove 52 and the lower end being the second annular groove 51. That is to say, the first row of support pieces 31 is set near the upper end of the inner ring 1, the second row of support pieces 32 is set near the middle of the inner ring 1, and the third row of support pieces 33 is set near the lower end of the inner ring 1.

[0049] Among them, the first row of support pieces 31, the second row of support pieces 32, and the third row of support pieces 33 are in the longitudinal direction of the inner ring 1 (i.e., Figure 4 (From a visual perspective) misalignment setting. In one example, when the annular airbag 10 is not inflated, the projections of the first row of support plates 31, the second row of support plates 32, and the third row of support plates 33 in the axial direction of the annular airbag 10 form a closed ring shape to avoid the formation of a through fold 62 in the longitudinal direction of the inner ring 1.

[0050] In the embodiments disclosed herein, such as Figure 5 and Figure 6 As shown, the upper and lower edges of the annular airbag 10 are respectively provided with an equal number of pleated positioning parts 6 at offsets. The pleated positioning parts 6 are used to control the position of the pleats 62 formed on the inner ring 1, and the multiple pleated positioning parts 6 are offset from the adjacent support pieces 3. When the annular airbag 10 is inflated, the corresponding positions of two adjacent pleated positioning parts 6 and one support piece 3 on the inner ring 1 can form an inflatable bulge area 61, so that the pleats 62 are located between any two inflatable bulge areas 61.

[0051] In some embodiments, the upper edge of the annular airbag 10 is provided with a plurality of pleated positioning portions 6, and the distance between any two adjacent pleated positioning portions 6 is equal. The lower edge of the annular airbag 10 is provided with the same number of pleated positioning portions 6 at equal intervals, and these pleated positioning portions 6 are offset from the pleated positioning portions 6 located on the upper edge of the annular airbag 10 in the axial direction of the annular airbag 10, to ensure that any two pleats 62 are not on the same straight line in the longitudinal direction of the inner ring 1.

[0052] In this embodiment of the disclosure, when the annular airbag 10 is inflated, two adjacent pleated positioning parts 6 and an adjacent support piece 3 form an inflatable bulge area 61 in the cavity. Multiple inflatable bulge areas 61 are symmetrically and staggeredly distributed along the circumferential midline, so that pleats 62 are formed between two adjacent inflatable bulge areas 61. Any two pleats 62 cannot form a through connection in the longitudinal direction parallel to the axial direction of the inner ring 1.

[0053] For example, the upper edge of the annular airbag 10 is provided with four pleated positioning parts 6. These four pleated positioning parts 6 are staggered with the four first row support pieces 31 near the upper edge of the inner ring 1 to form four inflatable bulge areas 61 near the upper edge of the annular airbag 10. The lower edge of the annular airbag 10 is provided with four pleated positioning parts 6. These four pleated positioning parts 6 are staggered with the two second row support pieces 32 and the two third row support pieces 33 to form four inflatable bulge areas 61 near the lower edge of the annular airbag 10. The four inflatable bulge areas 61 near the upper edge of the annular airbag 10 are symmetrically and staggered with the four inflatable bulge areas 61 near the lower edge of the annular airbag 10 along the circumferential midline of the inner ring 1, so that the pleats 62 between any two inflatable bulge areas 61 cannot form a through-flow in the longitudinal direction parallel to the axial direction of the inner ring 1.

[0054] In this embodiment, the end edge of the inner ring 1 and the end edge of the outer ring 2 are symmetrically attached to form a pleated positioning part 6. That is, when the annular airbag 10 is not inflated, the inner ring 1 and the outer ring 2 are stacked, and the inner ring 1 and the outer ring 2 at a preset position are attached by heat pressing to form the pleated positioning part 6, wherein the preset position is located at the end of the annular airbag 10.

[0055] In other embodiments, the upper and lower edges of the annular airbag 10 are respectively annular grooves. By fitting and fixing the side walls of the annular grooves at corresponding positions on the upper and lower edges of the annular airbag 10, a pleated positioning part 6 is formed. By limiting the expansion range of the annular grooves at the position of the pleated positioning part 6, the pleated positioning part 6 can limit the distance between the inner ring 1 and the outer ring 2 when the annular airbag 10 is inflated.

[0056] In this embodiment of the disclosure, there are multiple sensors 4 to improve the accuracy of blood pressure measurement.

[0057] In some embodiments, there are two sensors 4, and a support plate 3 is provided at a symmetrical position for each sensor 4. That is, a support plate 3 is provided at the position of each sensor 4, wherein the sensor 4 and the corresponding support plate 3 are located on opposite sides of the inner ring 1, the sensor 4 is located on the side of the inner ring 1 facing the hollow part, and the support plate 3 is located on the side of the inner ring 1 facing the cavity.

[0058] In some embodiments, the support plate 3 corresponding to the sensor 4 has a curved structure to avoid the sensor 4, so as to prevent the support plate 3 with a certain degree of rigidity from supporting the sensor 4 and affecting the measurement accuracy of the sensor 4.

[0059] For example, the second row of support plates 32 are symmetrically arranged at the position adapted to the sensor 4, and the middle part of the second row of support plates 32 is Ω-shaped to avoid the sensor 4.

[0060] In this embodiment of the disclosure, the annular airbag 10 further includes an air inlet 21, which is disposed on the outer ring 2 and communicates with the cavity, for inflating and deflating the cavity of the annular airbag 10.

[0061] In some embodiments, there are multiple air ports 21. The multiple air ports 21 are equally spaced on the outer ring 2 and arranged circumferentially along the outer ring 2, so that the inner ring 1 expands more evenly during the inflation of the annular airbag 10, thereby avoiding excessive local deformation of the inner ring 1 and insufficient pressure on the upper arm.

[0062] In some embodiments, the air vent 21 is matched with the support plate 3. When the annular airbag 10 is inflated, two adjacent pleated positioning parts 6 and an adjacent support plate 3 form an inflatable bulge area 61 in the cavity. By correspondingly setting the air vent 21 with the support plate 3, when the air vent 21 inflates the cavity, the cavity of the annular airbag 10 forms an inflatable bulge area 61 that is symmetrically distributed vertically and staggeredly, so as to improve the uniformity of the expansion of the inner ring 1.

[0063] In some embodiments, the air vents 21 are provided in a one-to-one correspondence with the first row of support pieces 31.

[0064] In this embodiment of the disclosure, the annular airbag 10 is formed by pressing and hot-pressing a flexible sheet to form an inner ring 1, an outer ring 2, an upper edge of the annular airbag 10, and a lower edge of the annular airbag 10. Alternatively, the annular airbag 10 is formed by splicing multiple flexible sheets to form an inner ring 1, an outer ring 2, an upper edge of the annular airbag 10, and a lower edge of the annular airbag 10.

[0065] In some embodiments, the flexible sheet is made of thermoplastic polyurethane (TPU) elastomer rubber.

[0066] Figure 10 This is a front view of a first side of a flexible sheet 7 according to an exemplary embodiment. Figure 11 This is a second front view of a flexible sheet 7 according to an exemplary embodiment. Figure 10 and Figure 11 As shown, in one embodiment of this disclosure, the annular airbag 10 is formed by pressing and folding a rectangular flexible sheet 7. The annular airbag 10 is formed by pressing and folding the flexible sheet 7 along its wide side 75, and by folding the first long side 71 of the flexible sheet 7 along its first surface towards the second long side 72, and then pressing and folding the second long side 72 together with the first long side 71. The first long side 71 of the flexible sheet 7, after being folded and pressed with the second long side 72, is used to form the inner ring 1 and the outer ring 2. The wide side 75 of the flexible sheet 7 is correspondingly pressed and folded to form the annular airbag 10.

[0067] The upper edge of the annular airbag 10 forms a first annular groove 52, and the lower edge of the annular airbag 10 forms a second annular groove 51. Figure 8 This is a cross-sectional view of the first annular groove 52 shown according to an exemplary embodiment. Figure 9 This is a cross-sectional view of the second annular groove 51 according to an exemplary embodiment. Figure 8 and Figure 9 As shown, both the first annular groove 52 and the second annular groove 51 have a V-shaped structure, which facilitates fitting and unfolding. The first annular groove 52 and the second annular groove 51 are in a fitted state when the annular airbag 10 is not inflated, and in an extended state when the annular airbag 10 is inflated.

[0068] For example, such as Figure 10 and Figure 11 As shown, a first dividing line 73 and a second dividing line 74 are constructed on the first surface of the flexible sheet 7 from the first long side 71 to the second long side 72. A first auxiliary line 731 and a second auxiliary line 732 are constructed on both sides of the first dividing line 73 at equal intervals. A third auxiliary line 741 and a fourth auxiliary line 742 are constructed on both sides of the second dividing line 74 at equal intervals. The first long side 71 of the flexible sheet 7 is folded along the first surface towards the second long side 72 to the third auxiliary line 741, and the first crease formed by the folding is the first dividing line 73. Figure 8 As shown, the first annular groove 52 includes a first groove bottom 521, a first groove edge 522, and a second groove edge 523. The first groove bottom 521 is formed by pressing down along a first crease line towards the cavity and hot-pressing the flexible sheets 7 on both sides of the first crease line. The first groove edge 522 is formed by pressing along a first auxiliary line 731 and hot-pressing the flexible sheets 7 on both sides of the first auxiliary line 731. The second groove edge 523 is formed by pressing along a second auxiliary line 732 and hot-pressing the flexible sheets 7 on both sides of the second auxiliary line 732. Figure 9 As shown, the second annular groove 51 includes a second groove bottom 511, a third groove edge 513, and a fourth groove edge 512. The second groove bottom 511 is formed by pressing down along the second dividing line 74 towards the cavity to create a second crease line, and then hot-pressing the flexible sheets 7 on both sides of the second crease line. The third groove edge 513 is formed by pressing along the third auxiliary line 741, and then hot-pressing the flexible sheets 7 on both sides of the third auxiliary line 741. The fourth groove edge 512 is formed by hot-pressing the aligned and fitted first long edge 71 and second long edge 72. Then, hot-pressing connects the two wide edges 75 of the flexible sheet 7 to form the annular airbag 10.

[0069] In some embodiments, the center line between the second auxiliary line 732 and the third auxiliary line 741 is the inflation equalization positioning line. By hot-pressing the flexible sheets 7 on both sides of the inflation equalization positioning line, it is easy to form an inflation bulge area 61 on both sides of the inflation equalization positioning line when the annular airbag 10 is inflated. The inflation equalization positioning line coincides with the circumferential center line of the inner ring 1.

[0070] In another embodiment of this disclosure, the annular airbag 10 is formed by splicing together multiple flexible sheets. For example, the annular airbag 10 includes a first flexible sheet, a second flexible sheet, and a third flexible sheet. The first and second flexible sheets are both rectangular, and are used to prepare the inner ring 1 and outer ring 2, respectively. The third flexible sheet is annular, and there are two third flexible sheets, which are used to prepare the upper edge and lower edge of the annular airbag 10, respectively.

[0071] The first flexible sheet and the second flexible sheet are stacked together. The end faces of the first and second flexible sheets are connected by a third flexible sheet to form a first annular groove 52 and a second annular groove 51, respectively. The two long sides of the first flexible sheet are heat-pressed to the inner rings of the two third flexible sheets, making the first flexible sheet annular and connecting its two wide sides to form an inner ring 1. The two long sides of the second flexible sheet are heat-pressed to the outer rings of the two third flexible sheets, making the second flexible sheet annular and connecting its two wide sides to form an outer ring 2. The first annular groove 52 and the second annular groove 51 are formed by heat pressing in the middle of the two third flexible sheets. Thus, the first, second, and third flexible sheets form a cavity for inflation. The first annular groove 52 and the second annular groove 51 are in a fitted state when the annular airbag 10 is not inflated, and in an extended state when the annular airbag 10 is inflated.

[0072] Based on the same inventive concept, this disclosure also provides a blood pressure monitor, including the annular airbag 10 involved in any of the above embodiments.

[0073] This embodiment of the blood pressure monitor is used for blood pressure measurement. The inner ring 1 of the annular air bladder 10 is fitted onto the upper arm. Gas is introduced into the cavity of the annular air bladder 10 through the air port 21 to pressurize it, causing the annular air bladder 10 to inflate. During the inflation of the annular air bladder 10, the expansion of the inner ring 1 applies pressure to the upper arm, thereby compressing and blocking blood flow to the corresponding blood vessels in the upper arm. The inner ring 1 is provided with multiple support plates 3, which are used to control the position of the folds 62 formed on the inner ring 1 when it inflates. By staggering the multiple support plates 3 in the axial direction of the inner ring 1, the folds 62 formed between any two support plates 3 are staggered in the axial direction of the inner ring 1. This design ensures that when the annular airbag 10 is inflated, the folds 62 formed on the surface of the inner ring 1 are regularly distributed and not vertically continuous. This prevents the formation of vertically continuous folds 62 on the inner ring 1 that align with the blood flow direction in the upper arm. This ensures that the area of ​​the inner ring 1 in contact with the upper arm is an effective pressurization area, while the folds 62 not in contact with the upper arm cannot provide space for blood flow. At this time, the sensor 4 can obtain a true and accurate blood pressure value.

[0074] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0075] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0076] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation.

[0077] It can be further understood that, unless otherwise specified, "connection" includes both direct connections where no other components exist between the two parties and indirect connections where other components exist between them.

[0078] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0079] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0080] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A circular airbag for blood pressure measurement, characterized in that, The annular air bag comprises an inner ring, an outer ring, a support sheet and a sensor. The inner ring and the outer ring seal to form an annular air bag with a cavity and a hollow part, when the annular air bag is not inflated, the inner ring and the outer ring are in close contact, when the annular air bag is inflated, the circumference of the outer ring changes within a first preset range, the circumference of the inner ring changes within a second preset range, and a wrinkle is formed on the surface of the inner ring, wherein the first preset range is smaller than the second preset range. The support sheet is a plurality of support sheets, and the plurality of support sheets are arranged in different rows along the circumference of the inner ring and are parallel and staggered on the inner ring, so that the wrinkles formed on the surface of the inner ring are regularly distributed and cannot be connected from top to bottom, the formation position of the wrinkles is limited by the two adjacent support sheets, and any two wrinkles cannot be connected in the longitudinal direction parallel to the axial direction of the inner ring. The sensor is arranged on one side of the inner ring facing the hollow part.

2. The toroidal-shaped airbag of claim 1, wherein, The support sheet is a strip-shaped soft plastic sheet, and the sum of the hardness of the strip-shaped soft plastic sheet and the hardness of the inner ring in contact with the strip-shaped soft plastic sheet is greater than the hardness of the inner ring.

3. The toroidal-shaped airbag of claim 1, wherein, The support sheet is arranged on one side of the inner ring facing and / or away from the cavity.

4. The toroidal-shaped airbag of claim 1, wherein, The plurality of support sheets at least include a first row of support sheets, a second row of support sheets and a third row of support sheets which are staggered and parallel to the end edges of the inner ring, the first row of support sheets is arranged on the upper side of the circumferential center line of the inner ring, the second row of support sheets is symmetrically arranged at a position adapted to the sensor, and the third row of support sheets is arranged on the lower side of the circumferential center line of the inner ring, wherein the first row of support sheets, the second row of support sheets and the third row of support sheets are staggered in the longitudinal direction of the inner ring.

5. The toroidal-shaped airbag of claim 4, wherein, The circumferential center line of the inner ring is equal in distance to the upper end edge of the inner ring and the lower end edge of the inner ring.

6. The toroidal-shaped airbag of any of claims 1-5, wherein, The upper end edge and the lower end edge of the annular air bag are respectively staggered with an equal number of wrinkle positioning portions, and the plurality of wrinkle positioning portions are staggered with the adjacent support sheets, wherein when the annular air bag is inflated, two adjacent wrinkle positioning portions and an adjacent support sheet form an inflated bulging area in the cavity, a plurality of inflated bulging areas are symmetrically and staggered distributed along the circumferential center line, so that two adjacent inflated bulging areas form the wrinkles, and any two wrinkles cannot be connected in the longitudinal direction parallel to the axial direction of the inner ring.

7. The toroidal-shaped airbag of claim 6, wherein, The wrinkle positioning portion is a structure that fits the symmetrical position of the end edge of the inner ring and the end edge of the outer ring.

8. The toroidal-shaped airbag of claim 6, wherein, The sensor is two, and the support sheet arranged at the symmetrical position of each sensor comprises a curved structure for avoiding the sensor.

9. The toroidal-shaped airbag of claim 6, wherein, The annular air bag comprises a gas port, and the gas port is a plurality of gas ports which are arranged at equal intervals on the outer ring and are in communication with the cavity to form a gas path for inflating and deflating the annular air bag.

10. The toroidal-shaped airbag of claim 6, wherein, The annular airbag is formed by hot-pressing a flexible sheet along the wide edges, and hot-pressing a first long edge of the flexible sheet to a second long edge of the flexible sheet in a direction from a first face of the flexible sheet to a second face of the flexible sheet after folding the first long edge to the second long edge, wherein an upper end of the annular airbag forms a first annular groove, and a lower end of the annular airbag forms a second annular groove, and wherein the first annular groove and the second annular groove are in a conforming state when the annular airbag is not inflated, and are in an extended state when the annular airbag is inflated.

11. The toroidal-shaped airbag of claim 6, wherein, The annular airbag comprises a first flexible sheet, a second flexible sheet and a third flexible sheet, the first flexible sheet and the second flexible sheet are arranged in a stack, and end faces of the first flexible sheet and the second flexible sheet are connected by the third flexible sheet to form a first annular groove and a second annular groove, respectively, and the first flexible sheet, the second flexible sheet and the third flexible sheet form a cavity for inflation, wherein the first annular groove and the second annular groove are in a conforming state when the annular airbag is not inflated, and are in an extended state when the annular airbag is inflated.

12. A sphygmomanometer, characterized by An annular airbag according to any one of claims 1-11.

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