Cuff and blood pressure measuring instrument
By designing a cuff with different elasticity between the inner and outer shells and a multi-cavity structure, the problem of inaccurate measurement and discomfort caused by the fixed size of traditional cuffs is solved, achieving adaptive adjustment and improving the accuracy and comfort of blood pressure measurement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional cuffs have fixed sizes and cannot be precisely adjusted according to the user's arm size, resulting in inaccurate measurements or discomfort to the user, and they are difficult to meet the needs of different groups of people.
Design an annular shell comprising an inner shell and an outer shell, with the inner shell having greater elasticity than the outer shell. A sealed cavity is connected through an air tube. The inner shell deforms and expands first when the air pressure increases, adapting to different arm circumferences. Combined with multiple sub-cavities and friction coefficient design, it ensures that the cuff fits the arm tightly.
It achieves adaptive adjustment of the cuff, improves measurement accuracy and user comfort, expands the applicable population, and simplifies the wearing process.
Smart Images
Figure CN224055989U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of medical device technology, and in particular to a cuff and blood pressure measuring device. Background Technology
[0002] A blood pressure monitor is an instrument for measuring blood pressure. Blood pressure monitors come in three types: upper arm, wrist, and finger. Upper arm and wrist blood pressure monitors typically include a cuff for securing the monitor to the user's arm.
[0003] Traditional cuffs typically offer only a few fixed sizes, making precise and flexible adjustments based on the user's arm size impossible. This leads to several issues: if the cuff is too large, it won't fit snugly against the arm, resulting in uneven pressure distribution during blood pressure measurement. This significantly affects the accuracy of the readings, potentially misleading health assessments. Conversely, if the cuff is too small, it will cause excessive pressure on the user's arm, causing discomfort and potentially affecting blood circulation over time. This also interferes with the accuracy of blood pressure measurements, failing to accurately reflect the individual's blood pressure level. Furthermore, given the significant differences in arm size among individuals, from children to obese individuals, fixed-size cuffs cannot meet the diverse needs of a wide range of users, greatly limiting the applicability of blood pressure monitors and reducing their versatility and practicality. Utility Model Content
[0004] Therefore, it is necessary to provide an adjustable cuff and blood pressure monitor to address the aforementioned technical problems.
[0005] An embodiment of the first aspect of this application provides a cuff including an annular shell and an air tube. The annular shell surrounds to form an annular cavity. The annular shell includes an inner shell and an outer shell that are sealed to each other. The inner shell is located on the side of the outer shell facing the annular cavity, and a sealed cavity is formed between the inner shell and the outer shell. The elasticity of the inner shell is greater than that of the outer shell. The air tube communicates with the sealed cavity.
[0006] In one embodiment, the sealing cavity includes a plurality of mutually sealing sub-cavities arranged around the annular cavity.
[0007] In one embodiment, the trachea includes a main tube and multiple branch tubes connected to the main tube, with each branch tube corresponding to a sub-cavity.
[0008] In one embodiment, the coefficient of friction of the inner shell is greater than that of the outer shell.
[0009] In one embodiment, the outer casing is provided with an air nozzle that connects the inside and outside of the sealed cavity, and the air pipe is connected to the air nozzle.
[0010] In one embodiment, the outer casing has an opening that connects the inside and outside of the sealed cavity, and the air pipe is sealed to the opening.
[0011] In one embodiment, the inner shell is made of thermoplastic polyurethane elastomer, and the outer shell is made of composite fabric.
[0012] An embodiment of the second aspect of this application provides a blood pressure measuring device, including a processor and a cuff as described in any of the above embodiments, the cuff being connected to the processor.
[0013] In one embodiment, an inflation mechanism is also included, which is connected to an air tube.
[0014] In one embodiment, a detection mechanism is also included, which may be a stethoscope and / or a pressure sensor, and the detection mechanism is connected to the processor.
[0015] The cuff provided in this application includes an annular shell and an air tube. The annular shell surrounds and forms an annular cavity. The annular shell includes an inner shell and an outer shell that are sealed together. The inner shell is located on the side of the outer shell facing the annular cavity, forming a sealed cavity between the inner shell and the outer shell. The elasticity of the inner shell is greater than that of the outer shell. The air tube communicates with the sealed cavity. By providing an air tube that communicates with the sealed cavity, this application allows air to be introduced into or expelled from the sealed cavity via the air tube. By making the annular shell surrounding and forming the annular cavity include an inner shell and an outer shell, and the elasticity of the inner shell is greater than that of the outer shell, when the air pressure in the sealed cavity increases and compresses the annular shell, the inner shell deforms first and expands towards the annular cavity, reducing the diameter of the annular cavity until it covers the arm inside the annular cavity. This meets the measurement needs of users with various arm circumferences and simplifies the wearing process of the cuff. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is one of the side view structural diagrams of the cuffs in some embodiments of this application.
[0018] Figure 2 An example is shown. Figure 1 One of the schematic diagrams of the cross-sectional structure of the cuff in the image from the AA perspective.
[0019] Figure 3 An example is shown. Figure 1 The second schematic diagram of the cross-sectional structure of the cuff from the AA perspective.
[0020] Figure 4 An example is shown. Figure 1 The third schematic diagram of the cross-sectional structure of the cuff from the AA perspective.
[0021] Figure 5 This is the second schematic diagram of the side view structure of an example cuff.
[0022] Figure label:
[0023] 10. Cuff; 11. Circular cavity;
[0024] 100. Annular shell; 110. Inner shell; 120. Outer shell; 130. Sealed cavity; 131. Sub-cavity;
[0025] 200. Trachea; 210. Main tube;
[0026] 300. Air valve. Detailed Implementation
[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.
[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.
[0033] The cuff provided in the embodiments of this application will now be described with reference to the accompanying drawings. In the drawings, for ease of drawing, the dimensions shown are not necessarily proportional to the actual dimensions.
[0034] Please refer to Figures 1 to 3 , Figure 1 This is one of the side view structural diagrams of the cuffs in some embodiments of this application. Figure 2 An example is shown. Figure 1 One of the schematic diagrams of the cross-sectional structure of the cuff in the image from the AA perspective. Figure 3 An example is shown. Figure 1 The second schematic diagram of the cross-sectional structure of the cuff from the AA perspective. Figure 2 The cuffs are in their initial state. Figure 3 The cuffs are in a deformed state.
[0035] like Figures 1 to 3As shown, this application provides a cuff 10, including an annular housing 100 and an air tube 200. The annular housing 100 surrounds to form an annular cavity 11. The annular housing 100 includes an inner shell 110 and an outer shell 120 that are sealed to each other. The inner shell 110 is located on the side of the outer shell 120 facing the annular cavity 11, and a sealed cavity 130 is formed between the inner shell 110 and the outer shell 120. The elasticity of the inner shell 110 is greater than that of the outer shell 120. The air tube 200 communicates with the sealed cavity 130.
[0036] The cuff 10 has an initial state and a deformed state. When the cuff 10 is in the initial state, the air pressure in the sealing cavity 130 is less than a preset threshold, and neither the inner shell 110 nor the outer shell 120 deforms. When the cuff 10 is in use, the user first inserts their arm into the annular cavity 11, and then air is introduced into the sealing cavity 130 through the air tube 200 to raise the air pressure in the sealing cavity 130 to a level greater than or equal to the preset threshold. The air pressure in the sealing cavity 130 then compresses the annular shell 100. Because the elasticity of the inner shell 110 is greater than that of the outer shell 120, the inner shell 110 undergoes elastic deformation first and expands in the direction of the annular cavity 11, causing the diameter of the annular cavity 11 to ( Figure 2 , Figure 3 When the size L in the middle becomes smaller, the cuff 10 is in a deformed state.
[0037] Optionally, when the cuff 10 is in a deformed state, as the air pressure inside the sealing cavity 130 gradually increases, the diameter of the annular cavity 11 gradually decreases until the inner shell 110 is blocked by an external force and stops deforming, for example, the inner shell 110 has already covered the user's arm, and then the air tube 200 stops inflating the sealing cavity 130.
[0038] Optionally, when the sealed cavity 130 is not ventilated, the diameter of the sealed cavity 130 is larger to accommodate users with thicker arms for blood pressure measurement. At the same time, since the inner shell 110 can expand towards the annular cavity 11 as the pressure inside the sealed cavity 130 increases, the diameter of the annular cavity 11 becomes smaller, and the cuff 10 can still accommodate users with thinner arms for blood pressure measurement.
[0039] Optionally, the rigidity of the outer shell 120 is much greater than that of the inner shell 110, so that when the air pressure inside the sealed cavity 130 increases, the inner shell 110 preferentially undergoes elastic deformation, while the outer shell 120 maintains its original shape as much as possible. That is, the outer diameter of the annular shell 100 remains as constant as possible, while the inner diameter (the diameter L of the annular cavity 11) can be changed by adjusting the air pressure in the sealed cavity 130. Preferably, the material of the inner shell 110 is thermoplastic polyurethane elastomer (TPU), and the material of the outer shell 120 is a composite fabric, such as carbon fiber-resin composite fabric, glass fiber-resin composite fabric, or high molecular weight polyethylene-resin composite fabric.
[0040] The cuff 10 of this embodiment includes an annular housing 100 and an air tube 200. The annular housing 100 surrounds to form an annular cavity 11. The annular housing 100 includes an inner shell 110 and an outer shell 120 that are sealed to each other. The inner shell 110 is located on the side of the outer shell 120 facing the annular cavity 11, and a sealed cavity 130 is formed between the inner shell 110 and the outer shell 120. The elasticity of the inner shell 110 is greater than that of the outer shell 120. The air tube 200 communicates with the sealed cavity 130. By providing the air tube 200 to communicate with the sealed cavity 130, this application allows air to be introduced into or discharged from the sealed cavity 130 via the air tube 200. By making the annular shell 100 surrounding the annular cavity 11 include an inner shell 110 and an outer shell 120, and the elasticity of the inner shell 110 is greater than that of the outer shell 120, when the air pressure in the sealed cavity 130 increases and squeezes the annular shell 100, the inner shell 110 deforms first and expands towards the annular cavity 11, making the diameter of the annular cavity 11 smaller until it covers the arm inside the annular cavity 11, thereby meeting the measurement needs of users with various arm circumferences and simplifying the wearing process of the cuff 10.
[0041] Please refer to Figure 4 , Figure 4 An example is shown. Figure 1 The third schematic diagram of the cross-sectional structure of the cuff from the AA perspective. Figure 4 The cuffs are in a deformed state.
[0042] like Figure 4 As shown, in some embodiments, the sealing cavity 130 includes a plurality of mutually sealing sub-cavities 131 arranged around the annular cavity 11.
[0043] Optionally, the trachea 200 includes a main tube 210 and multiple branch tubes (not shown) connected to the main tube 210, with each branch tube corresponding to a sub-cavity 131. When the cuff 10 is in a deformed state, gas is introduced into multiple sub-cavities 131 through the multiple branch tubes, increasing the air pressure in each sub-cavity 131 and collectively compressing the inner shell 110 to expand it. The inflation rate of each branch tube to the sub-cavities 131 is the same.
[0044] In this embodiment, when the cuff 10 is in a deformed state, the cross-sectional shape of the annular cavity 11 may not be circular, but the cross-sectional area of the annular cavity 11 will still decrease as the sub-cavity 131 expands, thereby achieving the coverage of the user's arm.
[0045] Optionally, the inner shell 110 and the outer shell 120 can be sealed independently between each sub-cavity 131 by means of adhesive bonding, welding or other methods.
[0046] The cuff 10 of this embodiment includes multiple sub-cavities 131 arranged around the annular cavity 11 within the sealed cavity 130. This ensures that the expansion rate of the inner shell 110 is similar at various positions during expansion, improving the centering of the arm relative to the cuff 10 when it covers the user's arm, thereby improving the accuracy of blood pressure measurement. Furthermore, since each sub-cavity 131 is independently sealed, the cuff 10 can still partially cover the arm even when some sub-cavities 131 leak air, thus extending the service life of the cuff 10.
[0047] In some embodiments, the coefficient of friction of the inner shell 110 is greater than that of the outer shell 120.
[0048] Optionally, the housing 120 includes a first surface (not shown) facing the sealing cavity 130 and a second surface (not shown) facing the annular cavity 11. The coefficient of friction of the second surface is greater than that of the housing 120, and the coefficient of friction of the second surface is greater than that of the first surface. Specifically, the second surface can be roughened by processes such as sandblasting or surface etching after the housing 120 is formed, so that the coefficient of friction of the second surface is greater than that of the first surface.
[0049] The cuff 10 of this application embodiment has a large coefficient of friction on the second surface. Even when the user's arm passes through the cuff 10 and the sealing cavity 130 is not yet inflated, a portion of the inner shell 110 can still contact the arm to generate friction. This reduces the risk of the cuff 10 slipping off before it covers the arm, simplifies the wearing process of the cuff 10, and enables the user to wear it independently.
[0050] In some embodiments, the housing 120 is provided with an air nozzle 300 that connects the inside and outside of the sealed cavity 130, and the air pipe 200 is connected to the air nozzle 300.
[0051] Please refer to Figure 5 , Figure 5 This is the second schematic diagram of the side view structure of an example cuff.
[0052] like Figure 5 As shown, in some other embodiments, the outer casing 120 has an opening (not shown) communicating with the inside and outside of the sealed cavity 130, and the air pipe 200 is sealed to the opening. The sealing connection can be achieved by laser welding.
[0053] In addition, this application also provides a blood pressure measuring device, including a processor (not shown) and a cuff 10 as provided in any of the above embodiments. The processor includes an inflation mechanism connected to an air tube 200, and the inflation mechanism can be a manual inflation valve or an electric air pump.
[0054] Optionally, the processor also includes a detection mechanism connected to the processor. The detection mechanism can be a stethoscope and / or a pressure sensor. The stethoscope is suitable for measuring blood pressure using the Korotkoff sound method, and the pressure sensor is suitable for measuring blood pressure using the oscillometric method. The probe of the detection mechanism is located on the side of the inner shell 110 facing the annular cavity 11 and is used to receive signals.
[0055] Optionally, the detection mechanism may also include an electrocardiogram detector, an ambulatory blood pressure detector, and a pulse wave detector, with the probes of each detector located on the side of the inner shell 110 facing the annular cavity 11, thereby increasing the functionality of the blood pressure monitor and improving its practicality.
[0056] Optionally, the processor also includes a display connected to the pressure sensor for displaying the subject's blood pressure data.
[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.
[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.
Claims
1. A cuff characterized in that, The application relates to a cuff for blood pressure measurement, comprising: a ring-shaped shell, which surrounds a ring-shaped cavity, the ring-shaped shell comprising an inner shell and an outer shell connected to each other in a sealed manner, the inner shell being located on the side of the outer shell facing the ring-shaped cavity, a sealed cavity being formed between the inner shell and the outer shell, the elasticity of the inner shell being greater than that of the outer shell; an air pipe, which is in communication with the sealed cavity.
2. The cuff of claim 1, wherein, The sealed cavity comprises a plurality of sub-cavities connected to each other in a sealed manner, and the plurality of sub-cavities are arranged around the ring-shaped cavity.
3. The cuff of claim 2, wherein, The air pipe comprises a main pipe and a plurality of branch pipes in communication with the main pipe, and the branch pipes are in one-to-one communication with the sub-cavities.
4. The cuff of claim 1, wherein, The friction coefficient of the inner shell is greater than that of the outer shell.
5. The cuff of claim 1, wherein, An air nozzle is arranged on the outer shell and is in communication with the inside and outside of the sealed cavity, and the air pipe is in communication with the air nozzle.
6. The cuff of claim 1, wherein, An opening is arranged on the outer shell and is in communication with the inside and outside of the sealed cavity, and the air pipe is in sealed connection with the opening.
7. The cuff of claim 1, wherein, The material of the inner shell is thermoplastic polyurethane elastomer, and the material of the outer shell is composite cloth.
8. A blood pressure measuring instrument, characterized by, The application further relates to a blood pressure measurement device, comprising a processor and the cuff as claimed in any one of claims 1 to 7, and the processor is connected to the cuff.
9. The blood pressure measuring instrument according to claim 8, characterized in that, The application further relates to a blood pressure measurement device, comprising: an inflation mechanism, which is in communication with the air pipe.
10. The blood pressure measuring instrument according to claim 8, characterized in that, The application further relates to a blood pressure measurement device, comprising: a detection mechanism, which can be a stethoscope and / or a pressure sensor, and the detection mechanism is connected to the processor.