Annular air bag and sphygmomanometer

Abstract

The invention relates to an annular air bag and a sphygmomanometer, and the annular air bag comprises an inner ring, an outer ring, a supporting sheet and a sensor. The inner ring and the outer ring are sealed to form an annular air bag with a cavity and a hollow part, the inner ring and the outer ring are attached when the annular air bag is not inflated, the perimeter of the outer ring changes within a first preset range and the perimeter of the inner ring changes within a second preset range when the annular air bag is inflated, and wrinkles are formed on the surface of the inner ring. The multiple supporting pieces are arranged on the inner ring in parallel in different rows in the circumferential direction of the inner ring in a staggered mode, so that when the annular air bag is in an inflated state, wrinkles formed on the surface of the inner ring are regularly distributed and cannot be vertically through. Through the arrangement of the supporting pieces, up-down through wrinkles consistent with the blood flow direction of the upper arm cannot be formed on the inner ring, it is ensured that the contact area of the inner ring and the upper arm is an effective pressurization area, blood flow can be normally blocked, and a real and accurate blood pressure value can be obtained.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to an annular airbag and a sphygmomanometer. Background Art

[0002] The electronic sphygmomanometer based on Korotkoff sounds measures blood pressure through the sound of blood impacting blood vessels. During the measurement process, the cuff is wrapped around the upper arm, and the airbag in the cuff is inflated by an external inflation device. The airbag continues to expand as it is inflated, and continues to apply pressure to the upper arm until the blood vessels are compressed and the blood flow is blocked. After determining that the blood flow is blocked, the airbag is deflated to reduce pressure until the blood flow in the artery rushes through the compressed blood vessels again to produce a pulsating blood flow. The pressure in the airbag corresponding to the first Korotkoff sound and the last Korotkoff sound during the decompression process of the airbag is determined as the systolic pressure and diastolic pressure. However, the inventors have found that for arm-tube sphygmomanometers, inaccurate blood pressure measurements may occur, especially the phenomenon that the diastolic pressure measurement value is too high. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a ring-shaped airbag and a sphygmomanometer.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided an annular airbag for blood pressure measurement, the annular airbag comprising an inner ring, an outer ring, a support sheet and a sensor; the inner ring and the outer ring are sealed to form an annular airbag having a cavity and a hollow portion, and when the annular airbag is not inflated, the inner ring and the outer ring fit together, and 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, and wrinkles are formed on the surface of the inner ring, wherein the first preset range is smaller than the second preset range; there are a plurality of support sheets, and the plurality of support sheets are arranged in parallel in different rows along the circumference of the inner ring and are staggered on the inner ring, so that the wrinkles formed on the surface of the inner ring when the annular airbag is inflated are regularly distributed and cannot penetrate up and down; the sensor is arranged 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 in contact with the strip-shaped soft plastic sheet is greater than the hardness of the inner ring.

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

[0007] In some embodiments, the plurality of support plates include at least a first row of support plates, a second row of support plates, and a third row of support plates that are staggered and parallel to the end edges of the inner ring, the first row of support plates being arranged on the upper side of a circumferential centerline of the inner ring, the second row of support plates being symmetrically arranged at positions adapted to the sensors, and the third row of support plates being arranged on the lower side of the circumferential centerline of the inner ring, wherein the first row of support plates, the second row of support plates, and the third row of support plates are staggered in the longitudinal direction of the inner ring.

[0008] In some embodiments, the wrinkles formed on the surface of the inner ring when the annular airbag is inflated are regularly distributed and cannot penetrate each other up and down, including: when the annular airbag is inflated, the formation position of the wrinkles is limited by two adjacent supporting sheets and any two wrinkles cannot penetrate each other in the longitudinal direction parallel to the axial direction of the inner ring.

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

[0010] In some embodiments, the upper and lower edges of the annular airbag are respectively staggered with a plurality of equal numbers of pleat positioning portions, and the plurality of pleat positioning portions are staggered with adjacent support sheets, wherein when the annular airbag is inflated, two adjacent pleat positioning portions and an adjacent support sheet form an inflatable bulge area in the cavity, and the plurality of inflatable bulge areas are symmetrically and staggeredly distributed along the circumferential midline, so that the pleats are formed between two adjacent inflatable bulge areas, and any two of the pleats cannot be penetrated in the longitudinal direction parallel to the axial direction of the inner ring.

[0011] In some embodiments, the pleat positioning portion is a structure that fits the end edge of the inner ring symmetrically with the end edge of the outer ring.

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

[0013] In some embodiments, the annular airbag includes a plurality of air ports, the plurality of air ports are evenly spaced in the outer ring and connected to the cavity to form an air path for inflating and deflating the annular airbag.

[0014] In some embodiments, the annular airbag is formed by folding a flexible sheet along the wide side and hot pressing, and the first long side of the flexible sheet is folded along the first surface of the flexible sheet toward the second long side of the flexible sheet, and the second long side is folded and hot pressed together with the first long side to form a first annular groove on the upper end edge of the annular airbag, and a second annular groove on the lower end edge of the annular airbag; wherein, 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, the end surface of the first flexible sheet and the end surface of the second flexible sheet are connected through 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 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 an embodiment of the present disclosure, there is provided a sphygmomanometer comprising the annular airbag according to any one of the first aspects above.

[0017] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the support sheet is arranged on the inner ring, so that when the annular airbag is inflated, wrinkles will not appear in the area where the support sheet is arranged on the inner ring, and the area where wrinkles appear is located between any two support sheets. By arranging multiple support sheets in parallel and staggered in different rows along the circumference of the inner ring, the wrinkles of the inner ring are staggered in the axial direction of the inner ring, that is, the wrinkles formed on the surface of the inner ring are regularly distributed and cannot be connected vertically. Since it is impossible to form vertically connected wrinkles on the inner ring that are consistent with the blood flow direction of the upper arm, the areas where the inner ring contacts the upper arm are all effective pressurized areas, which can block the blood flow normally to obtain a true and accurate blood pressure value. Moreover, another embodiment of the present disclosure has a plurality of pleat locating portions of equal number offsetly disposed on two end edges of the annular airbag, which is further defined as an inflation bulge area when the annular airbag is inflated by the pleat locating portions and the supporting sheet, and offset pleats are formed between two adjacent inflation bulge areas, so that it is impossible for the annular airbag to have pleats that run through the upper and lower parts in the longitudinal direction consistent with the blood flow direction of the upper arm. In other words, it is impossible for any two pleats to form a straight line in the longitudinal direction, thereby ensuring that the blood flow during measurement is normally blocked by the inflated annular airbag, thereby improving the accuracy of the arm-cuff type sphygmomanometer in measuring blood pressure based on the Korotkoff sound method.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a schematic structural diagram of a ring-shaped airbag in a non-inflated state according to an exemplary embodiment.

[0021] Figure 2 The figure is a schematic diagram showing the position of a support sheet in an annular airbag according to an exemplary embodiment.

[0022] Figure 3 It is a schematic diagram showing the arrangement of support sheets in an annular airbag according to an exemplary embodiment.

[0023] Figure 4 yes Figure 3 Top view of the arrangement of the middle support plates.

[0024] Figure 5 It is a schematic structural diagram of a ring-shaped airbag in an inflated state according to an exemplary embodiment.

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

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

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

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

[0029] Fig.10 FIG. 4 is a front view of a first surface of a flexible sheet according to an exemplary embodiment.

[0030] Fig.11 The figure is a front view of a second surface of a flexible sheet according to an exemplary embodiment. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the attached claims.

[0032] In the related art, the annular airbag of the arm tube type sphygmomanometer is fixed in the arm tube, and the outer ring of the annular airbag is fixed by the arm tube. When measuring blood pressure, the upper arm is inserted into the arm tube so that the inner ring of the annular airbag is sleeved on the upper arm. When the annular airbag is inflated, the annular airbag expands so that the inner ring is close to the upper arm and applies pressure. At this time, 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. Due to the inconsistency of the circumference of the inner and outer rings, wrinkles may form in some areas of the inner ring during the inflation process. The wrinkles located in the inner ring may penetrate up and down along the longitudinal direction of the inner ring. Among them, the phenomenon that the wrinkles penetrate up and down along the longitudinal direction of the inner ring can be understood as the wrinkles penetrating the two ends of the annular airbag along the axial direction of the annular airbag. When the wrinkles penetrate the two ends of the annular airbag along the axial direction of the annular airbag, the area of ​​the wrinkles cannot contact the upper arm, resulting in the blood vessels corresponding to the area that does not contact the upper arm being unable to be compressed and blocked to block blood flow. In order to compress and block the blood flow of the blood vessels corresponding to the untouched upper arm area, the inflation pressure of the annular airbag needs to be continuously increased to increase the volume of the inflated bulge area on both sides of the fold, shrink the fold, and then compress and block the blood flow of the blood vessels corresponding to the area. However, by increasing the inflation pressure of the annular airbag, the systolic and diastolic pressures obtained during the decompression process of the annular airbag will be higher overall, resulting in inaccurate blood pressure measurement.

[0033] In order to solve the above technical problems, the present disclosure provides an annular airbag and a sphygmomanometer. The annular airbag sets a plurality of support sheets on the inner circle to limit the positions where the folds are formed, so that the folds on the inner circle are regularly distributed and cannot be passed through from top to bottom, thereby making the inner circle of the annular airbag effectively fit the upper arm and effectively block the blood flow, so as to improve the accuracy of blood pressure measurement and obtain a true and reliable blood pressure value.

[0034] Figure 1 1 is a schematic structural diagram of a ring-shaped airbag 10 in a non-inflated state according to an exemplary embodiment. Figure 2 1 is a schematic diagram showing the position of a support sheet 3 in a ring-shaped airbag 10 according to an exemplary embodiment. Figure 5 1 is a schematic structural diagram of a ring-shaped airbag 10 in an inflated state according to an exemplary embodiment. Figure 6 1 is a top view of a ring-shaped airbag 10 in an inflated state according to an exemplary embodiment. Figure 7 FIG. 1 is a cross-sectional view of a toroidal 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 sheet 3 and a sensor 4. The inner ring 1 and the outer ring 2 are sealed to form an annular airbag 10 having a cavity and a hollow part. The outer ring 2 surrounds the outer side of the inner ring 1, and the formed cavity is located between the inner ring 1 and the outer ring 2. The cavity is used to inflate the annular airbag 10. The hollow part is the hollow area surrounded by the inner ring 1, and the hollow part is used to insert the upper arm.

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

[0036] like Figure 1 and Figure 2 As shown, when the annular airbag 10 is not inflated, the inner ring 1 and the outer ring 2 fit together.

[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, and the circumference of the inner ring 1 varies within a second preset range.

[0038] It is understandable that the inner ring 1 and the outer ring 2 are made of soft materials. When the annular airbag 10 is not inflated, the outer ring 2 fits the inner ring 1, that is, 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, that is, the circumference of the outer ring 2 increases, and the inner ring 1 expands inward, that is, 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 ductility. During the inflation process 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, but due to the ductility limitation of the outer ring 2, the circumference of the outer ring 2 does not continue to increase after it increases to L2. At this time, since the inner ring 1 located inside the outer ring 2 can form wrinkles 62, after the circumference of the outer ring 2 increases to L2, the inner ring 1 can continue to expand inward until the inner ring 1 is close to the upper arm, and the circumference of the inner ring 1 reaches P2. Therefore, when the inner ring 1 and the outer ring 2 have the same ductility, or the arm tube fixes the outer ring 2 of the annular airbag 10, the difference between L2 and L must be smaller than the difference between L and P2, that is, the first preset range is smaller than the second preset range.

[0040] In the disclosed embodiment, the support sheet 3 is arranged on the inner ring 1 so that the area covered by the support sheet 3 on the inner ring 1 will not form wrinkles 62. There are multiple support sheets 3 so that the wrinkles 62 formed on the inner ring 1 are located between any two support sheets 3.

[0041] Among them, the length direction of the plurality of support sheets 3 is the same as the circumferential direction of the inner ring 1, and they are respectively located in different circumferential directions of the inner ring 1. When the annular airbag 10 is inflated, the folds 62 located between any two support sheets 3 can be located in different axial directions of the inner ring 1, which will not affect the squeezing of the blood vessels. In addition, in the axial direction of the inner ring 1, the support sheets 3 are mutually staggered, 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 penetrated from top to bottom. In other words, the two adjacent support sheets 3 limit the formation position of the folds 62, and any two folds 62 formed cannot be penetrated in a direction parallel to the axial direction of the inner ring 1. By making the folds 62 formed on the inner ring 1 staggered in the axial direction of the annular airbag 10, that is, the folds 62 that are consistent with the blood flow direction of the upper arm cannot be formed on the inner ring 1, it is ensured that the areas where the inner ring 1 contacts the upper arm are all effective pressurized areas, and the folds 62 that are not in contact with the upper arm cannot provide flow space for blood flow. Therefore, the annular airbag 10 of the embodiment of the present disclosure can block the blood flow normally to obtain a true and accurate blood pressure value.

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

[0043] In the disclosed embodiment, 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 to ensure that wrinkles 62 are not formed in the area covered by the support sheet 3 on the inner ring 1.

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

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

[0046] In some embodiments, a plurality of support sheets 3 are respectively arranged on the side of the inner ring 1 away from the cavity, and on the side of the inner ring 1 facing the cavity. A plurality of support sheets 3 may be arranged opposite to each other in pairs, wherein two oppositely arranged support sheets 3 are respectively located on both sides of the inner ring 1, so as to improve the hardness of the area covered by the support sheets 3 on the inner ring 1, and avoid the formation of wrinkles 62 in the area covered by the support sheets 3. Alternatively, a plurality of support sheets 3 may be staggered and distributed on both sides of the inner ring 1, and the wrinkles formed by the limit cannot be passed through in the direction parallel to the axial direction of the annular airbag 10.

[0047] Figure 3 Schematic diagram of the arrangement of the support sheet 3 in a ring-shaped airbag 10 according to an exemplary embodiment. Figure 4 yes Figure 3 A top view of the arrangement of the middle support sheet 3. Figures 2 to 4 As shown, in the embodiment of the present disclosure, the plurality of support sheets 3 at least include a plurality of rows of support sheets 3 that are staggered and parallel to the end edges of the inner ring 1. The plurality of rows of support sheets 3, for example, include three rows of support sheets, respectively referred to as the first row of support sheets 31, the second row of support sheets 32, and the third row of support sheets 33.

[0048] The first row of support sheets 31 is arranged on the upper side of the circumferential median line of the inner ring 1, the second row of support sheets 32 is symmetrically arranged at a position adapted to the sensor 4, and the third row of support sheets 33 is arranged on the lower side of the circumferential median line of the inner ring 1, that is, the first row of support sheets 31 and the third row of support sheets 33 are respectively located on both sides of the circumferential median line of the inner ring 1. The circumferential median line of the inner ring 1 is equidistant from the upper edge of the inner ring 1 and the lower edge of the inner ring 1, and the upper edge of the inner ring 1 and the lower edge of the inner ring 1 are respectively the two ends of the inner ring 1 that are opposite to each other in the axial direction. Figure 2As shown, the first annular groove 52 and the second annular groove 51 are respectively formed by two closed end edges of the inner ring 1 and the outer ring 2, the upper end edge is the first annular groove 52, and the lower end edge is the second annular groove 51. In other words, the first row of support sheets 31 is arranged close to the upper end edge of the inner ring 1, the second row of support sheets 32 is arranged close to the middle of the inner ring 1, and the third row of support sheets 33 is arranged close to the lower end edge of the inner ring 1.

[0049] The first row of support sheets 31, the second row of support sheets 32 and the third row of support sheets 33 are arranged in the longitudinal direction of the inner ring 1 (i.e. Figure 4 In one example, when the annular airbag 10 is not inflated, in the axial direction of the annular airbag 10, the projections of the first row of support sheets 31, the second row of support sheets 32, and the third row of support sheets 33 are in a closed ring shape to avoid the formation of through wrinkles 62 in the longitudinal direction of the inner ring 1.

[0050] In the embodiments of the present disclosure, Figure 5 and Figure 6 As shown, the upper and lower edges of the annular airbag 10 are staggered with a plurality of equal fold positioning portions 6. The fold positioning portions 6 are used to control the positions where the folds 62 on the inner ring 1 are formed, and the plurality of fold positioning portions 6 are staggered with the adjacent support sheets 3. When the annular airbag 10 is inflated, two adjacent fold positioning portions 6 and one support sheet 3 at corresponding positions on the inner ring 1 can form an inflatable bulge area 61, so that the folds 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 pleat positioning portions 6, and any two adjacent pleat positioning portions 6 are spaced at equal intervals. The lower edge of the annular airbag 10 is provided with the same number of pleat positioning portions 6 at equal intervals, and the pleat positioning portions 6 located at the upper edge of the annular airbag 10 are staggered 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 the embodiment disclosed herein, when the annular airbag 10 is inflated, two adjacent pleat positioning portions 6 and an adjacent support sheet 3 form an inflatable bulge area 61 in the cavity, and the 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, and any two pleats 62 cannot be penetrated 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 pleat positioning parts 6, which are staggered with the four first-row support sheets 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 pleat positioning parts 6, which are staggered with the two second-row support sheets 32 and the two third-row support sheets 33 to form four inflatable bulge areas 61 near the lower edge of the annular airbag 10. Among them, the four inflatable bulge areas 61 near the upper edge of the annular airbag 10 are symmetrical and staggered with the four inflatable bulge areas 61 near the lower edge of the annular airbag 10 along the circumferential median line of the inner ring 1, so that the pleats 62 between any two inflatable bulge areas 61 cannot form a penetration in the longitudinal direction parallel to the axial direction of the inner ring 1.

[0054] In the embodiment of the present disclosure, the end edge of the inner ring 1 is bonded to the symmetrical position of the end edge of the outer ring 2 to form the fold positioning portion 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 bonded by hot pressing to form the fold positioning portion 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, and the two side walls of the annular grooves at the corresponding positions of the upper and lower edges of the annular airbag 10 are fitted and fixed to form the pleated positioning portion 6. By limiting the expansion range of the annular groove at the position of the pleated positioning portion 6, the pleated positioning portion 6 can limit the distance between the inner ring 1 and the outer ring 2 when the annular airbag 10 is inflated.

[0056] In the embodiment of the present 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 sheet 3 is provided at a symmetrical position of each sensor 4. That is, a support sheet 3 is provided at the position of each sensor 4, wherein the sensor 4 and the corresponding support sheet 3 are respectively 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 sheet 3 is located on the side of the inner ring 1 facing the cavity.

[0058] In some embodiments, the support sheet 3 corresponding to the sensor 4 has a curved structure for avoiding the sensor 4 to prevent the support sheet 3 having a certain hardness from supporting the sensor 4 and affecting the measurement accuracy of the sensor 4 .

[0059] For example, the second row of support sheets 32 are symmetrically arranged at positions adapted to the sensors 4 , and the middle portion of the second row of support sheets 32 is in an Ω shape for avoiding the sensors 4 .

[0060] In the embodiment of the present disclosure, the annular airbag 10 further includes an air port 21 , which is disposed on the outer ring 2 and communicated with the cavity, and is used to inflate and deflate the cavity of the annular airbag 10 .

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

[0062] In some embodiments, the air port 21 matches the support sheet 3. When the annular airbag 10 is inflated, two adjacent pleat positioning portions 6 and an adjacent support sheet 3 form an inflatable bulge area 61 in the cavity. By arranging the air ports 21 and the support sheet 3 in correspondence, when the air ports 21 inflate the cavity, when each air port 21 inflates the cavity, the cavity of the annular airbag 10 forms an inflatable bulge area 61 that is symmetrical and staggered in distribution, so as to improve the uniformity of the expansion of the inner ring 1.

[0063] In some embodiments, the air ports 21 are disposed in one-to-one correspondence with the first row of support sheets 31 .

[0064] In the disclosed embodiment, the annular airbag 10 is formed by folding and hot pressing a piece of flexible sheet to form the inner ring 1, the outer ring 2, the upper edge of the annular airbag 10 and the lower edge of the annular airbag 10. Alternatively, the annular airbag 10 is formed by splicing a plurality of flexible sheets to form the inner ring 1, the outer ring 2, the upper edge of the annular airbag 10 and the lower edge of the annular airbag 10.

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

[0066] Fig.10 FIG. 1 is a front view of a first surface of a flexible sheet 7 according to an exemplary embodiment. Fig.11 FIG. 2 is a front view of the second side of a flexible sheet 7 according to an exemplary embodiment. Fig.10 and Fig.11 As shown, in one embodiment of the present disclosure, the annular airbag 10 is formed by folding and hot pressing a rectangular flexible sheet 7. The annular airbag 10 is formed by folding and hot pressing a flexible sheet 7 along the wide side 75, and the first long side 71 of the flexible sheet 7 is folded along the first surface of the flexible sheet 7 toward the second long side 72 of the flexible sheet 7, and the second long side 72 is folded and hot pressed with the first long side 71. The first long side 71 of the flexible sheet 7 is folded and hot pressed with the second long side 72 to form the inner ring 1 and the outer ring 2. The wide side 75 of the flexible sheet 7 is correspondingly hot pressed to form the annular airbag 10.

[0067] The upper end of the annular airbag 10 forms a first annular groove 52 , and the lower end of the annular airbag 10 forms a second annular groove 51 . Figure 8 is a cross-sectional view of the first annular groove 52 according to an exemplary embodiment. Fig. 9 FIG. 5 is a cross-sectional view of the second annular groove 51 according to an exemplary embodiment. Figure 8 and Fig. 9 As shown, the first annular groove 52 and the second annular groove 51 are both V-shaped structures, which are convenient for fitting and unfolding. The first annular groove 52 and the second annular groove 51 are respectively in a fitted state when the annular airbag 10 is not inflated, and are respectively in an extended state when the annular airbag 10 is inflated.

[0068] For example, if Fig.10 and Fig.11 As shown, a first cutting line 73 and a second cutting line 74 are respectively 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 respectively constructed at a first equal interval on both sides of the first cutting line 73, and a third auxiliary line 741 and a fourth auxiliary line 742 are respectively constructed at a second equal interval on both sides of the second cutting line 74. The first long side 71 of the flexible sheet 7 is folded along the direction of the first surface toward the direction of the second long side 72 to the third auxiliary line 741, and the first folding line formed by the folding is the first cutting 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, wherein the first groove bottom 521 is formed by pressing down along the first crease line toward the cavity and hot pressing the flexible sheet 7 on both sides of the first crease line. The first groove edge 522 is formed by folding along the first auxiliary line 731 and hot pressing the flexible sheet 7 on both sides of the first auxiliary line 731. The second groove edge 523 is formed by folding along the second auxiliary line 732 and hot pressing the flexible sheet 7 on both sides of the second auxiliary line 732. Fig. 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 toward the cavity to form a second crease line, and the flexible sheet 7 on both sides of the second crease line is hot pressed. The third groove edge 513 is formed by folding along the third auxiliary line 741, and the flexible sheet 7 on both sides of the third auxiliary line 741 is hot pressed. The fourth groove edge 512 is formed by hot pressing the first long side 71 and the second long side 72 that are aligned and bonded. The two wide sides 75 of the flexible sheet 7 are then connected by hot pressing to form the annular airbag 10.

[0069] In some embodiments, the midline between the second auxiliary line 732 and the third auxiliary line 741 is the inflation balance positioning line, and the flexible sheet 7 on both sides of the inflation balance positioning line is hot pressed to form an inflation bulge area 61 on both sides of the inflation balance positioning line when the annular airbag 10 is inflated. The inflation balance positioning line coincides with the circumferential midline of the inner ring 1.

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

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

[0072] Based on the same inventive concept, the present disclosure also provides a sphygmomanometer, comprising the annular airbag 10 involved in any of the above embodiments.

[0073] The sphygmomanometer of the disclosed embodiment is used for blood pressure measurement. The inner ring 1 of the annular airbag 10 is put on the upper arm, and gas is added to the cavity of the annular airbag 10 through the air port 21 to pressurize the annular airbag 10, so that the annular airbag 10 expands. During the inflation process of the annular airbag 10, the inner ring 1 expands and applies pressure to the upper arm, so that the corresponding blood vessels in the upper arm are compressed and the blood flow is blocked. The inner ring 1 is provided with a plurality of support sheets 3, which are used to control the position of the folds 62 formed on the inner ring 1 when the inner ring 1 expands. By staggering the plurality of support sheets 3 in the axial direction of the inner ring 1, the folds 62 formed between any two support sheets 3 are arranged in a staggered manner in the axial direction of the inner ring 1. When the annular airbag 10 is inflated, the wrinkles 62 formed on the surface of the inner ring 1 are regularly distributed and cannot penetrate vertically, and the wrinkles 62 that penetrate vertically and are consistent with the blood flow direction of the upper arm cannot be formed on the inner ring 1, ensuring that the areas where the inner ring 1 contacts the upper arm are all effective pressurized areas, and the wrinkles 62 that are not in contact with the upper arm cannot provide flow space for blood flow. At this time, the sensor 4 can obtain a true and accurate blood pressure value.

[0074] It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

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

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

[0077] It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

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

[0079] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

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

Claims

1. A ring-shaped airbag for blood pressure measurement, characterized in that: The annular airbag comprises an inner ring, an outer ring, a support sheet and a sensor; The inner ring and the outer ring are sealed to form an annular airbag having a cavity and a hollow part. When the annular airbag is not inflated, the inner ring and the outer ring are in contact with each other. When the annular airbag is inflated, the circumference of the outer ring changes within a first preset range, and the circumference of the inner ring changes within a second preset range, and wrinkles are formed on the surface of the inner ring, wherein the first preset range is smaller than the second preset range. There are multiple support sheets, and the multiple support sheets are arranged in parallel and staggered on the inner ring in different rows along the circumference of the inner ring, so that the wrinkles formed on the surface of the inner ring when the annular airbag is inflated are regularly distributed and cannot penetrate up and down; The sensor is arranged on a side of the inner ring facing the hollow portion.

2. The annular airbag according to claim 1, characterized in that: 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 annular airbag according to claim 1, characterized in that: The support sheet is arranged on a side of the inner ring facing toward and / or away from the cavity.

4. The annular airbag according to claim 1, characterized in that: The multiple support plates include at least a first row of support plates, a second row of support plates and a third row of support plates which are staggered and parallel to the end edges of the inner ring, the first row of support plates are arranged on the upper side of the circumferential center line of the inner ring, the second row of support plates are symmetrically arranged at positions adapted to the sensors, and the third row of support plates are arranged on the lower side of the circumferential center line of the inner ring, wherein the first row of support plates, the second row of support plates and the third row of support plates are staggered in the longitudinal direction of the inner ring.

5. The annular airbag according to claim 4, characterized in that: The method of making the wrinkles formed on the surface of the inner ring when the annular airbag is inflated be regularly distributed and unable to penetrate each other up and down includes: when the annular airbag is inflated, the formation position of the wrinkles is limited by two adjacent supporting sheets and any two wrinkles cannot penetrate each other in the longitudinal direction parallel to the axial direction of the inner ring.

6. The annular airbag according to claim 4, characterized in that: The circumferential median line of the inner ring is equidistant from the upper edge of the inner ring and the lower edge of the inner ring.

7. The annular airbag according to any one of claims 1 to 6, characterized in that: The upper and lower ends of the annular airbag are respectively staggered with a plurality of pleat positioning portions of equal number, and the plurality of pleat positioning portions are staggered with adjacent support sheets, wherein when the annular airbag is inflated, two adjacent pleat positioning portions and an adjacent support sheet form an inflatable bulge area in the cavity, and the plurality of inflatable bulge areas are symmetrically and staggeredly distributed along the circumferential midline, so that the pleats are formed between two adjacent inflatable bulge areas, and any two of the pleats cannot be penetrated in the longitudinal direction parallel to the axial direction of the inner ring.

8. The annular airbag according to claim 7, characterized in that: The pleat positioning portion is a structure that fits the end edge of the inner ring symmetrically with the end edge of the outer ring.

9. The annular airbag according to claim 7, characterized in that: There are two sensors, and the support sheet arranged at a symmetrical position of each sensor includes a curved structure for avoiding the sensor.

10. The annular airbag according to claim 7, characterized in that: The annular airbag comprises a plurality of air ports, which are arranged at equal intervals in the outer ring and communicated with the cavity to form an air path for inflating and deflating the annular airbag.

11. The annular airbag according to claim 7, characterized in that: The annular airbag is formed by folding a flexible sheet along the wide side and hot pressing, and the first long side of the flexible sheet is folded along the first surface of the flexible sheet toward the second long side of the flexible sheet, and the second long side is folded and hot pressed together with the first long side, the upper end edge of the annular airbag forms a first annular groove, and the lower end edge of the annular airbag forms a second annular groove; wherein, 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.

12. The annular airbag according to claim 7, characterized in that: 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, the end surface of the first flexible sheet and the end surface of the second flexible sheet are connected through 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; wherein, 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.

13. A sphygmomanometer, characterized in that: The invention comprises the annular airbag as described in any one of claims 1 to 12.

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