Tactile sensing airbag component specially used for wearable blood pressure measurement and preparation method

Abstract

The present application discloses a tactile sensing airbag assembly and preparation process specially used for wearable blood pressure watches. It includes an airbag and an air nozzle installed on the airbag. The airbag is formed by melting and pressing at least two layers of substrates with different elastic moduli, and an air chamber is formed between the two adjacent layers of substrates; the tactile sensor is a flexible pressure sensor, which is arranged on a substrate on the side relatively close to the wrist, and the elastic modulus of the substrate relatively close to the wrist is smaller than the elastic modulus of the substrate far from the wrist, forming a modulus combination that is most conducive to improving the signal-to-noise ratio of the blood pressure signal; the airbag also includes accessories to facilitate the fastening of the airbag to the strap; the airbag may also include a reinforcing sheet. The airbag can be rolled into a ring structure to be mounted on the wrist of the user, and at the same time, the intelligent sensing airbag and the special snap-on accessories constitute an airbag assembly, and the airbag assembly can be detachably assembled with the sphygmomanometer body. The tactile sensing airbag assembly has the advantages of high signal-to-noise ratio and easy disassembly.

Description

Technical Field

[0001] The present application relates to the technical field of wearable blood pressure measurement, and in particular to a tactile sensing airbag component specially used for wearable blood pressure measurement and a preparation method thereof. Background Art

[0002] The watch-type blood pressure monitor is a new type of smart wearable device in the field of health testing. It has a convenient and fast use experience and is favored by consumers. However, when solving the contradictory relationship between the medical accuracy, miniaturization and comfort of the watch-type blood pressure monitor, it is often interfered by various factors and causes measurement errors, which makes it difficult to meet the FD / CFD standards. One of the problems is that the thickness, morphology and even fat layer thickness of different people's wrists are inconsistent, but the tightness adjustment of the strap is not continuous, and different people have different wearing habits. As a result, the same model of watch-type blood pressure monitor has different airbag-wrist gaps for different people, which will cause non-constant baseline drift of the blood pressure curve, resulting in different measurement errors for blood pressure measurement for different people.

[0003] To solve this problem, Omron uses multiple airbags to achieve consistent initial tightness for blood pressure measurement. Its HertGuide uses a three-airbag solution, with airbag 1 near the wrist of the watch case and airbag 2 on the strap. These two airbags are inflated by a piezoelectric pump. When they touch the wrist, the pressure inside the airbags rises rapidly. The pressure rise curves of airbags 1 and 2 are detected by the air pressure sensor. The same initial pressure value is used for each person to ensure that the contact pressure on each person's wrist is equal. After the contact pressure is equal, the solenoid valve closes the air path of airbags 1 and 2, and starts to inflate blood pressure detection airbag 3, thereby measuring blood pressure based on the boost method.

[0004] Huawei's solution is to achieve high-precision blood pressure measurement through a single airbag solution and PPG blood pressure compensation. The principle is that the strap it designs has a certain electrical impedance, and the tightness of different people wearing it has a certain linear correlation with the electrical impedance, that is, when the watch buckle is inserted into different strap holes, the strap has different impedances. The tightness of the watch is determined by the measured impedance, and then the blood pressure compensation and PPG compensation preset at different tightness levels are used to achieve high-precision blood pressure measurement.

[0005] The above two solutions are the current mainstream solutions, which we call multi-airbag structural solutions and single-airbag compensation solutions. The multi-airbag structural solution has a continuous range of high precision, because even if different people have different wrist thicknesses and wear different tightness, the initial contact pressure measured by airbag three can be guaranteed to be consistent when airbag one and airbag two are inflated, so it has a better initial contact pressure in a larger continuous range. However, its disadvantages are also very obvious. The numerous airbags cause the product to have a large volume. The inflation of multiple airbags causes a long single measurement time and greater power consumption. In order to reduce the coupling error between the flexible bodies of multiple airbags, the auxiliary airbag two and the blood pressure measurement airbag three must be isolated with a high-hardness isolation plate, resulting in a very low configuration comfort. Therefore, this solution is difficult to popularize. Currently, it is only adopted by Omron and Yanhe Intelligent Technology (Hangzhou) Co., Ltd., which is not conducive to large-scale popularization.

[0006] The single-airbag compensation solution has a smaller size, better comfort, and lower power consumption. However, the drawback of this solution is that the discontinuity of the buckle holes of the strap leads to inconsistent tightness for different people, which causes discontinuous impedance. The use of compensation pressure under discontinuous impedance conditions requires a large amount of data measurement and algorithm optimization, which requires a large amount of MCU storage and computing space. At the same time, the PPG algorithm needs to be used to further improve the accuracy of blood pressure measurement. It is very difficult and has low universality, especially for people with special wrist circumferences and specific non-statistical people.

[0007] In order to solve the above problems, the present invention proposes an airbag component solution with tactile perception based on a single airbag solution. Summary of the invention

[0008] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the following detailed description. The content of this application is not intended to identify the key features of the technical solution claimed.

[0009] Some embodiments of the present application propose tactile sensing airbags to solve the technical problems mentioned in the above background technology section.

[0010] As a first aspect of the present application, some embodiments of the present application provide a tactile sensing airbag assembly specifically for wearable blood pressure measurement, comprising an airbag and an air nozzle mounted on the airbag, wherein the airbag is formed by melting and pressing at least two layers of substrates with different elastic moduli, and an air chamber is formed between the two adjacent layers of substrates;

[0011] The tactile sensor is a flexible pressure sensor, which is arranged on a substrate on a side relatively close to the wrist, and the elastic modulus of the substrate relatively close to the wrist is smaller than the elastic modulus of the substrate far from the wrist.

[0012] Furthermore, the airbag has at least two layers of air chambers that are interconnected to form a multi-layer spring-type air chamber, and adjacent air chambers are interconnected.

[0013] Furthermore, the tactile sensor includes at least one of a resistive film pressure sensor or a capacitive film pressure sensor, and the tactile sensor is arranged on the inner wall or outer wall of the substrate near the wrist side to achieve tactile perception.

[0014] Furthermore, the tactile sensing airbag assembly also includes a spring pin, which contacts the contact point of the built-in tactile sensor so that the tactile sensor can communicate with the internal circuit of the sphygmomanometer body.

[0015] Furthermore, the airbag also includes a reinforcing sheet, which is bonded to the substrate on the side relatively far from the wrist, so that the overall elastic modulus of the substrate on the side close to the wrist in the same air chamber is smaller than the elastic modulus of the substrate on the side far from the wrist.

[0016] Furthermore, the tactile sensing airbag component also includes: an attachment, and the attachment and the substrate are fused and pressed together.

[0017] As a second aspect of the present application, some embodiments of the present application provide a preparation method for preparing the aforementioned tactile sensing airbag component dedicated to wearable blood pressure measurement, comprising the following steps:

[0018] Substrate die cutting;

[0019] The accessories, air nozzles, and tactile sensors are melt-pressed onto different substrates respectively;

[0020] Melting and pressing the substrate on which the accessories, air nozzle, and tactile sensor have been melted and pressed to form an air bag;

[0021] Die cutting and trimming;

[0022] The airbag is thermally bent to keep a specific curvature;

[0023] Assemble the components, including the spring ejector pins.

[0024] Furthermore, for the substrate close to the wrist side, which has a relatively low elastic modulus, if the elastic modulus of the substrate is insufficient, the substrate with the side air chamber is reinforced, and the reinforcing sheet is hot-melt composited with the substrate.

[0025] Furthermore, the tactile sensor can be attached to the inner surface or outer surface of the substrate near the wrist by bonding or welding. If attached to the outer surface, an additional layer of ultra-thin substrate is required for outer coating.

[0026] Furthermore, the preparation method of the tactile sensor includes:

[0027] Spin coating the graphene-polyurethane elastomer liquid on the substrate;

[0028] The spin-coated liquid is subjected to photolithography, curing and etching to form a pressure-sensitive array on the substrate to form a sensitive layer;

[0029] The silver paste is screen-printed on another substrate with high precision in a comb-like structure to form an electrode layer;

[0030] The step layers are screen-printed and photocured on both sides or around the pressure-sensitive array to form a hollow structure between the sensitive layer and the electrode layer; the sensitive layer and the electrode layer are packaged based on adhesion to form a tactile sensor with an initial response point.

[0031] The beneficial effect of this application is that the design idea of ​​this scheme is to design the wrist-side air chamber of the airbag based on specific materials and process routes to have a tactile perception function, and the air pressure inside the airbag corresponding to the specific micro-pressure (between the skin and the tactile sensor) based on tactile perception is used as the initial value of effective data statistics, thereby realizing the drift correction of the pulse wave curve and avoiding the measurement error caused by different wearing tightness. This scheme reduces the volume and power consumption of the watch-type blood pressure monitor, while improving the wearing comfort, and has higher continuous measurement accuracy and universality among the population. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0033] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0034] In the attached picture:

[0035] Figure 1 is an overall schematic diagram of a tactile sensing airbag dedicated to wearable blood pressure measurement according to an embodiment of the present application;

[0036] Figure 2 yes Figure 1 Exploded view in ;

[0037] Figure 3 is an exploded view of a tactile sensing airbag according to an embodiment of the present application (with the first slice and the second slice added);

[0038] Figure 4 is a perspective view of a tactile sensor according to an embodiment of the present application;

[0039] Figure 5is a cross-sectional view of a tactile sensor according to an embodiment of the present application;

[0040] Figure 6 is an exploded view of a tactile sensing airbag according to another embodiment of the present application;

[0041] Figure 7 is a flow chart of the tactile sensor fabrication of the present application;

[0042] Figure 8 It is a flow chart of the tactile sensing airbag manufacturing of the present application;

[0043] The reference numerals in the figure are:

[0044] 1. airbag; 11. first substrate; 111. first slice; 112. first incision; 12. second substrate; 121. second slice; 122. second incision; 14. reinforcing sheet; 15. buckle;

[0045] 2. Gas nozzle;

[0046] 3. Attachments;

[0047] 4. Spring ejector pin;

[0048] 51. electrode substrate; 52. electrode layer; 53. sensitive layer; 54. sensitive substrate; 55. supporting layer; DETAILED DESCRIPTION

[0049] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0050] It should also be noted that, for ease of description, only the parts related to the present application are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0051] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0052] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0053] refer to Figure 1 to Figure 2, a tactile sensing airbag assembly specially used for wearable blood pressure measurement, comprising an airbag 1, an air nozzle 2, an accessory 3, the air nozzle 2, a spring ejector pin 4, and a tactile sensor;

[0054] The airbag 1 is formed by melting and pressing at least two layers of substrates with different elastic moduli, and the edge portions of the two layers of substrates are bonded to each other, thereby forming an air chamber between the two layers of substrates; and the substrates also have a certain curvature, so that the airbag 1 formed by the base layer is curved.

[0055] In order to distinguish the two layers of substrates, the substrate forming the inner wall of the lower end of the air chamber is defined as the first substrate 11, and the substrate forming the inner wall of the upper end of the air chamber is defined as the second substrate 12; thus, when the tactile sensing airbag 1 component dedicated to wearable blood pressure measurement provided by the present application is assembled on the cuff of the electronic blood pressure meter, the first substrate 11 is the substrate close to the wrist side, and the second substrate 12 is the substrate away from the wrist side. At the same time, a buckle 15 is bonded to the second substrate 12, and the buckle 15 can be connected to the cuff.

[0056] To this end, the tactile sensor is arranged on the first substrate 11 (close to the wrist side), and the elastic modulus of the first substrate 11 and the second substrate 12 are different. In this embodiment, the elastic modulus of the first substrate 11 is set to be smaller than that of the second substrate 12. In essence, the elastic modulus of the substrate close to the wrist side needs to be smaller than that of the substrate far from the wrist side; wherein the tactile sensor is a flexible sensor; in this way, the tactile sensor can form a sensor with the airbag 2 to determine whether the airbag is completely worn on the user's wrist.

[0057] When the above solution is used to measure blood pressure, the airbag 1 is assembled on the cuff of the electronic blood pressure meter, the cuff is wrapped around the wrist of the user, the second substrate 12 is fitted with the cuff of the electronic blood pressure meter, the first substrate 11 is fitted with the wrist of the user, and gas is injected into the air chamber. After the airbag 1 starts to expand, the first substrate 11 provided with the tactile sensor will deform, and then fit the wrist of the user to a state without a gap.

[0058] At the same time, the substrate provided with the tactile sensor will be deformed because it fits the user's wrist, and then the tactile sensor can generate a corresponding signal according to the deformation. This design can directly measure whether the airbag and the user's wrist are in a tight fit. Compared with judging whether the airbag fits the wrist by the change of the air bag pressure, the flexible tactile sensor can form a sensing area on the surface of the airbag. When this sensing area is deformed by contact with the wrist, it can judge whether the airbag fits the user's wrist.

[0059] The first substrate 11 and the second substrate 12 are configured to have two elastic moduli, so that when the tactile sensor is deformed, the first substrate 11 where the tactile sensor is located deforms more, while the second substrate 12 deforms less. Therefore, the tactile sensor can form a signal-to-noise ratio that is most favorable for reflecting the blood pressure signal.

[0060] Moreover, the initial value obtained through data statistics can be used to determine whether the airbag 1 is in close contact with the wearer's wrist through the signal change detected by the tactile sensor. After determining the value of the close contact between the airbag 1 and the wearer's wrist, the drift correction of the pulse wave curve is achieved to avoid measurement errors caused by different wearing tightness.

[0061] That is, the technical solution provided by the present application, by using a substrate with a difference in elastic modulus to form an air chamber, can then determine through data statistics that the airbag 1 is expanded to an initial state in which it fits seamlessly against the wearer's wrist, thereby reducing the measurement error caused by the gap between the airbag 1 and the wrist in traditional blood pressure detection methods.

[0062] In a more specific scheme, the periphery of the first substrate 11 and the second substrate 12 is formed into an air chamber by high-frequency melting, the first substrate 11 is melted and pressed onto the attachment 3, a hole is set on the second substrate 12, the air nozzle 2 passes through the above-mentioned hole, and the air nozzle 2 is connected to the airbag 1 formed by the first substrate 11 and the second substrate 12, and the inlet of the air nozzle 2 forms a connecting hole of the air chamber; then, gas can be filled into the air chamber through the air nozzle 2.

[0063] Furthermore, the present application uses the difference in elastic modulus between the first substrate 11 and the second substrate 12 to enable the tactile sensor to obtain a better signal-to-noise ratio during operation. Therefore, in order to ensure that there is a better difference in elastic modulus between the first substrate 11 and the second substrate 12, a reinforcement sheet 14 is attached to the second substrate 12, thereby ensuring that the elastic modulus of the substrate away from the wearer's wrist is greater than the elastic modulus of the substrate close to the wearer's wrist.

[0064] The present application provides a reinforcing sheet 14 to allow the second substrate 12 and the first substrate 11 to have a sufficient difference in elastic modulus, compared to the solution where the airbag is attached to the cuff and the cuff transmits the restraining force to the airbag; because there is an initial gap between the airbag and the cuff, the restraining ability of the cuff is different when the airbag is expanded to different degrees. For this reason, the difference in elastic modulus provided by the present application can effectively prevent the airbag from expanding in a direction away from the user's wrist, resulting in measurement errors caused by the pressure after the airbag is expanded not being fully applied to the user's wrist.

[0065] In a more specific solution, in order to allow the first substrate 11 and the second substrate 12 to form an air chamber with an initial volume and form an air chamber with a multi-layer spring structure, the present application also provides the following structure.

[0066] In a more specific embodiment, a first slice 111 is also attached to the first substrate 11, and a first cutout 112 is provided on the first slice 111; thus, after the first slice 111 and the first substrate 11 are attached to each other, a structure with an upper groove can be formed, and the upper groove can form an independent air chamber;

[0067] A second slice 121 is attached to the second substrate 12, and a second cutout 122 is provided on the second slice 121. After the second substrate 12 and the second slice 121 are fused with each other, a structure with a lower groove can be formed, so that the lower groove can form an independent air chamber;

[0068] After the first substrate 11 with the first slice 111 is bonded to the second substrate 12 with the second slice 121, the lower groove and the upper groove can be connected to each other, and the upper groove is smaller than the lower groove, so that the lower groove and the upper groove can form a multi-layer spring air chamber after bonding.

[0069] In an actual setting, because only the first substrate 11 is directly attached to the wearer's wrist, there is no restriction on the number of first slices 111 and second slices 121; in the setting, the substrate attached with the tactile sensor can be defined as the first substrate 11 (close to the wearer's wrist), and the remaining substrates and slices can be defined as the second substrate 12 (away from the wearer's wrist).

[0070] In a more specific solution, the air chamber formed by the airbag 1 needs to be formed into a multi-layer spring-type air chamber, so that the bottom inner wall of the air chamber (the inner wall containing the tactile receptor) and the top inner wall of the air chamber can have a sufficient difference in elastic modulus;

[0071] The touch sensor is a resistive thin film pressure sensor or a capacitive thin film pressure sensor.

[0072] In a more specific embodiment, the tactile sensor is disposed on the inner wall of the first substrate 11 (the inner side of the air chamber); of course, in the remaining embodiments, reference is made to Figure 6 The tactile sensing airbag 1 can also be arranged on the outer wall of the first substrate 11 (the outside of the air chamber).

[0073] During use, the detection signal generated by the tactile sensor needs to be transmitted, and for this purpose, the spring ejector pin 4 and the contact point of the tactile sensor are in contact with each other.

[0074] The structure of the tactile sensor:

[0075] The tactile sensor includes an electrode substrate 51, an electrode layer 52, a sensitive layer 53, and a sensitive substrate 54; wherein the electrode layer 52 covers the electrode substrate 51, the sensitive layer 53 covers the electrode layer 52, and the sensitive substrate 54 covers the sensitive layer 53; and a support layer 55 is further provided at the edges of the sensitive layer 53 and the electrode layer 52, and the upper end and the lower end of the support layer 55 are fixedly connected to the electrode substrate 51 and the sensitive substrate 54 respectively, so that the electrode substrate 51, the sensitive substrate 54 and the support layer 55 will wrap the motor layer and the electrode substrate 51;

[0076] Reference image:

[0077] The electrode substrate 51 is attached to the upper end surface of the first substrate 11, and the tactile sensor will be arranged inside the air chamber;

[0078] Reference image:

[0079] The sensitive substrate is attached to the lower end surface of the first substrate 11, and the tactile sensor is then arranged outside the air chamber.

[0080] Regardless of how the sensitive layer and the electrode layer 52 are arranged, the area of ​​the sensitive layer is smaller than the area of ​​the electrode layer 52, and the area of ​​the sensitive layer forms the main area for the tactile sensor to sense pressure changes. After the electrode layer 52 extends to the area of ​​the attachment 3, holes are arranged on the sensitive substrate or the electrode substrate 51 to form contacts of the tactile sensor.

[0081] That is: the end of the tactile sensor is melted and pressed to expose the contact (FPC copper / silver pad) to achieve circuit interconnection between the sensor and the sphygmomanometer body based on a micro-elastic conductive mechanism.

[0082] In order to better illustrate the airbag provided by the present application, the method for making the airbag is described below:

[0083] The preparation method comprises the following steps:

[0084] S1: substrate die cutting;

[0085] The TPU or PVC raw material is die-cut into multiple substrates with a thickness of 0.15mm~0.3mm; multiple substrates can be die-cut according to needs, and through holes can be cut on the substrate as slices.

[0086] S2: melt-press the accessory 3, the air nozzle 2, and the tactile sensor onto different substrates respectively; specifically, melt-press the accessory 3 onto the first substrate, melt-press the tactile sensor onto the first substrate, melt-press the air nozzle 2 onto the second substrate, and let the end of the air nozzle 2 face the first substrate.

[0087] S3: Melt and press the above-mentioned accessory 3, air nozzle 2, and tactile sensor melt-pressed substrate to form an air bag; that is, the periphery of the first substrate 11 and the second substrate 12 is melt-pressed by high frequency to form an air bag with an initial air chamber, wherein the air nozzle 2 is connected to the air chamber, and the opening of the air nozzle 2 forms a connecting hole of the air chamber;

[0088] When it is necessary to form an air chamber with an initial cavity, the slice with the cutout can be melt-pressed into an airbag intermediate, and then the first substrate 11 and the second substrate 12 are melt-pressed on both sides of the airbag intermediate.

[0089] S4: Die cutting and trimming: trimming the edge of the substrate after molten pressing.

[0090] S5: performing thermal bending forming on the airbag so that the airbag 1 maintains a specific bending curvature;

[0091] S6: Assemble the assembly, the assembly includes the spring ejector pin 4; assemble the spring ejector pin 4 to the buckle 15 so that the spring ejector pin 4 and the contact point of the tactile sensor contact each other. The above processes do not necessarily need to be performed in the order listed, and can be replaced according to needs.

[0092] Furthermore, the substrate close to the wearer's wrist needs to select a substrate with a low elastic modulus to ensure that there is a sufficient elastic modulus difference between the substrate close to the wearer's wrist and the substrate away from the wearer's wrist; when it is necessary to strengthen the elastic modulus difference between the upper inner wall and the lower inner wall of the air chamber, the substrate away from the wearer's wrist can be reinforced, that is, the reinforcing sheet and the substrate are hot-melt-bonded, and the reinforcing sheet can be selected to be stainless steel.

[0093] In a more specific embodiment, the tactile sensor and the near-wrist substrate may also be bonded together; if the tactile sensor is disposed outside the air chamber, an ultra-thin substrate needs to be bonded or welded to the tactile sensor for coating.

[0094] Furthermore,

[0095] The method for preparing the tactile sensor comprises:

[0096] The graphene-polyurethane elastomer liquid is spin-coated on the substrate, and the spin-coated liquid is subjected to photolithography, curing and etching to form a pressure-sensitive array on the substrate to form a sensitive layer;

[0097] The silver paste is screen-printed on another substrate with high precision in a comb-like structure to form an electrode layer; the step layer is screen-printed and photocured on both sides or around the pressure sensitive array to form a hollow structure between the sensitive layer and the electrode layer; specifically, the substrate is dried, and then the conductive silver paste is screen-printed on the substrate with a comb-like structure, and the electrode layer is dried, coated, photocured, etched, stripped, and dried to form an electrode layer, and then the step layer is screen-printed and photocured on both sides or around the pressure sensitive array.

[0098] The sensitive layer and the electrode layer are packaged based on adhesion to form a tactile sensor with an initial response point.

[0099] During the setting, the tactile sensor can be set on the substrate by melting, pressing or bonding after it is manufactured. Of course, the sensitive layer or the electrode layer can also be directly manufactured on the substrate.

[0100] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure.

Claims

1. A tactile sensing airbag assembly specially used for wearable blood pressure measurement, comprising an airbag and an air nozzle mounted on the airbag, characterized in that: The airbag is formed by melting and pressing at least two layers of substrates with different elastic moduli, and an air chamber is formed between two adjacent layers of substrates; A first slice is also attached to the first substrate, and a first cutout is provided on the first slice; after the first slice and the first substrate are attached to each other, a structure with an upper groove can be formed, and the upper groove can form an independent air chamber; The second substrate is attached with a second slice, and a second incision is provided on the second slice. After the second substrate and the second slice are fused with each other, a structure with a lower groove can be formed, so that the lower groove can form an independent air chamber; After the first substrate with the first slice attached thereto is attached thereto and the second substrate with the second slice attached thereto is attached thereto, the lower groove and the upper groove can be connected to each other, and the upper groove is smaller than the lower groove, and the lower groove and the upper groove can form a multi-layer spring-type air chamber after being attached thereto; The tactile sensor is a flexible pressure sensor, which is arranged on a substrate on a side relatively close to the wrist, and the elastic modulus of the substrate relatively close to the wrist is smaller than the elastic modulus of the substrate far from the wrist.

2. The tactile sensing airbag assembly dedicated to wearable blood pressure measurement according to claim 1 is characterized in that: The tactile sensor includes at least one of a resistive film pressure sensor and a capacitive film pressure sensor. The tactile sensor is arranged on the inner wall or outer wall of the substrate close to the wrist side to achieve tactile perception.

3. The tactile sensing airbag assembly dedicated to wearable blood pressure measurement according to claim 1 is characterized in that: The tactile sensing airbag assembly also includes a spring thimble, which contacts the contact point of the built-in tactile sensor so that the tactile sensor can communicate with the internal circuit of the sphygmomanometer body.

4. The tactile sensing airbag assembly dedicated to wearable blood pressure measurement according to claim 1, characterized in that: The airbag also includes a reinforcing sheet, which is attached to the substrate on the side relatively far from the wrist, so that the overall elastic modulus of the substrate on the side close to the wrist in the same air chamber is smaller than the elastic modulus of the substrate on the side far from the wrist.

5. The tactile sensing airbag assembly dedicated to wearable blood pressure measurement according to claim 1, characterized in that: The tactile sensing airbag component also includes an attachment, which is fused and pressed with the substrate.

6. A preparation method for preparing a tactile sensing airbag assembly for wearable blood pressure measurement as claimed in any one of claims 1 to 5, characterized in that: The steps include: Substrate die cutting; The accessories, air nozzles, and tactile sensors are melt-pressed onto different substrates respectively; The base material on which the accessories, air nozzle and tactile sensor have been melted and pressed is melted to form an air bag; Die cutting and trimming; The airbag is thermally bent to keep a specific curvature; Assemble the components, including the spring ejector pins.

7. The preparation method according to claim 6, characterized in that: The substrate close to the wrist side has a relatively low elastic modulus. If the difference in elastic modulus between the substrates is not enough, the substrate with the side air chamber is reinforced, and the reinforcing sheet is hot-melt composited with the substrate.

8. The preparation method according to claim 6, characterized in that: The tactile sensor can be attached to the inner surface or outer surface of the substrate near the wrist by bonding or welding. If it is attached to the outer surface, an additional layer of ultra-thin substrate is required for outer coating.

9. The preparation method according to claim 6, characterized in that: The method for preparing the tactile sensor comprises: Spin coating the graphene-polyurethane elastomer liquid on the substrate; The spin-coated liquid is subjected to photolithography, curing and etching to form a pressure-sensitive array on the substrate to form a sensitive layer; The silver paste is screen-printed on another substrate with high precision in a comb-like structure to form an electrode layer; Screen printing and photocuring step layers on both sides or around the pressure sensitive array to form a hollow structure between the sensitive layer and the electrode layer; The sensitive layer and the electrode layer are packaged based on adhesion to form a tactile sensor with an initial response point.

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