CN115868951A - Airbag and wearable device - Google Patents

Abstract

Embodiments of the present disclosure relate to airbags and wearable devices. The airbag includes: a capsule, the capsule comprising: a first bladder portion having a first outer periphery; a second bladder portion spaced from the first bladder portion and having a second outer periphery; and a third bladder portion disposed between the first and second bladder portions, one end of the third bladder portion being coupled to the first outer periphery and the other end of the third bladder portion being coupled to the second outer periphery, the first, second and third bladder portions together enclosing an inflatable chamber; at least one longitudinal tie disposed in the inflatable chamber, each longitudinal tie having two ends coupled to the first and second bladder portions, respectively; and an air tap disposed on one of the first and second bladder portions and in fluid communication with the inflatable chamber. The present disclosure provides an airbag having a stable shape and high detection accuracy.

Description

Airbag and wearable device

Technical Field

Embodiments of the present disclosure generally relate to the field of medical devices or wearable devices, and in particular to balloons for detecting blood pressure.

Background

With the increasing development of society, people pay more attention to health in daily life. At present, cardiovascular and cerebrovascular diseases are the first of four chronic disease mortality rates, and hypertension is an important evaluation standard for diagnosis and prevention of cardiovascular and cerebrovascular diseases. Therefore, the blood pressure detection technology and the device which are accurate, continuous, simple and convenient have important value for the early prevention and early treatment jig for the cardiovascular and cerebrovascular diseases. Wearable equipment of integrated blood pressure measurement function will can satisfy user to blood pressure detection's real-time nature, continuity requirement, and wearable equipment measures the commonly used method of blood pressure and includes the oscillography, and at the in-process that adopts the oscillography to measure blood pressure, the gasbag is essential important part, plays the key effect to the precision of measuring blood pressure.

Conventional bladders have primarily included silicone bladders and thermoplastic polyurethane elastomer (TPU) bladders. The silica gel air bag needs to be formed by a mould, the wall thickness of a finished product is large, and the silica gel air bag is difficult to form into a complex air bag shape. The TPU airbag is mainly prepared by welding the peripheries of two film layers together by a high-frequency process. The thickness of the wall of the air bag is thin, the size of the air bag is small, but in the process of inflating and measuring the blood pressure, the problems that the effective measurement size is reduced due to the olive-shaped protrusion, the measurement is inaccurate due to the sudden change of the side edge of the air bag, the measurement is inaccurate due to the curling of the inner layer membrane of the air bag and the like can occur.

Disclosure of Invention

Embodiments of the present application aim to provide an airbag to at least partially address the foregoing and other potential technical problems.

In a first aspect of the present disclosure, an airbag is provided. The airbag includes: a capsule comprising: a first bladder portion having a first outer periphery; a second bladder portion spaced opposite the first bladder portion and having a second outer periphery; and a third bladder portion enclosed between the first and second bladder portions, one end of the third bladder portion being coupled to the first outer periphery and the other end of the third bladder portion being coupled to the second outer periphery, the first, second and third bladder portions enclosing an inflatable chamber together; at least one longitudinal tie disposed in the inflatable chamber in a longitudinal direction, each longitudinal tie having two ends coupled to the first and second bladder portions, respectively; and an air tap disposed at the first bladder portion and in fluid communication with the inflatable chamber. Through vertical lacing wire, can avoid the gasbag to appear olive dress arch when aerifing, this has increased effective measurement size, has improved measurement accuracy.

In some embodiments, the airbag further comprises at least one transverse tie disposed in the inflatable chamber in a transverse direction, an outer periphery of each transverse tie coupled to the third bladder portion. The transverse lacing wire can reduce the problem that the side edge protrudes outwards, and the measuring accuracy is further improved.

In some embodiments, each transverse tie bar is provided with an opening at a location corresponding to at least one longitudinal tie bar, and the at least one longitudinal tie bar is coupled to the first and second bladder portions through the respective openings. The openings can realize fluid communication in the chamber and provide arrangement space for the longitudinal lacing wires.

In some embodiments, the third bladder portion comprises at least one connection, each connection being recessed towards the interior of the inflatable chamber and each connection being coupled to a respective transverse tie. The connecting portion can reduce the problem of side edge protrusion.

In some embodiments, a cross-section of each connecting portion taken along a plane defined by the longitudinal direction is V-shaped, and a tip of the V-shaped connecting portion is coupled to a respective transverse lacing wire. The V-shaped connecting portion allows the airbag to have a small storage volume, thereby enabling the airbag to be applied to a miniaturized device. And the V-shaped connecting part can further reduce the problem that the side edge protrudes outwards.

In some embodiments, at least one connection is interposed between the first and second bladder portions. Thus, the airbag can have a small storage volume.

In some embodiments, the balloon further comprises at least one support rod disposed in the inflatable chamber. When the part of the air bag close to the human body is curled, the support rod can ensure the uniformity and consistency of the air pressure in the air bag chamber, and the measurement accuracy is improved.

In some embodiments, each support rod is attached to the first or second bladder portion.

In some embodiments, the area of the first bladder portion is greater than or equal to the area of the second bladder portion. With such an arrangement, it is advantageous to increase the effective measurement size.

In a second aspect of the disclosure, a wearable device is provided. The wearable device includes: a band for attaching the wearable device to a human body; an airbag according to a first aspect of the present disclosure, disposed on the loop; a pump in fluid communication with the air tap of the air bag to inflate the inflatable chamber; and a controller for determining the blood pressure of the person wearing the device by controlling the pump to inflate the air bags. The wearable device comprises an airbag according to the first aspect of the present disclosure, and thus can provide the advantages as described above as well.

In some embodiments, the second bladder portion is coupled with a circumferential band, and the first bladder portion is adapted to rest against a wrist of a person wearing the device.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:

fig. 1 shows a schematic diagram of a scenario in which a wearable device may be applied, according to some embodiments of the present disclosure;

fig. 2 to 3 respectively show a cross-sectional view of a conventional airbag structure;

FIG. 4 shows a schematic structural view of a bladder, according to some embodiments of the present disclosure;

FIG. 5 showsbase:Sub>A cross-sectional view of the balloon of FIG. 4 along line A-A;

FIG. 6 illustrates a cross-sectional view of a bladder according to further embodiments of the present disclosure;

FIG. 7 illustrates a cross-sectional view of a bladder according to further embodiments of the present disclosure;

FIG. 8 illustrates a schematic structural view of a balloon in accordance with some embodiments of the present disclosure, with a portion of the balloon shown in cross-section;

FIG. 9 illustrates a cross-sectional view of a balloon according to some embodiments of the present disclosure; and

fig. 10-17 illustrate a process of making an airbag according to some embodiments of the present disclosure.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

In describing embodiments of the present disclosure, the terms "include" and its derivatives should be interpreted as being inclusive, i.e., "including but not limited to. The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

Fig. 1 shows a schematic diagram of a scenario in which a wearable device may be applied, according to some embodiments of the present disclosure. A person may wear the wearable device 100, for example, may be worn at a wrist. An air bag may be provided in the wearable device 100 for detecting the blood pressure of the wearer.

Fig. 2 to 3 respectively show schematic cross-sectional views of conventional airbag structures. As shown in fig. 2, the air bag comprises two films 29' and 29' with edges bonded together, the air bag is in contact with a human body (such as the wrist 10 '), when the air bag is inflated to measure the blood pressure, olive bulge occurs, and the effective measurement dimension W ' is far smaller than the total length L ' of the air bag; in addition, the side edges of the air bag are easily deformed by projection, which may cause inaccuracy in blood pressure measurement. Further, as shown in fig. 3, the balloon includes a chamber 20', an outer membrane coupled to a band 30', and an inner membrane in contact with a human body (e.g., wrist 10 '). During inflation of the balloon to measure blood pressure, the inner membrane of the balloon may curl, forming a protrusion 24 'that extends into the chamber 20'. The protrusions 24' divide the chamber 20' into sub-chambers 21', 22', 23', which may be isolated from each other due to the wearable membrane material, resulting in different air pressures between the sub-chambers, which may lead to inaccurate blood pressure measurements.

The present disclosure proposes an airbag that can be used for measuring blood pressure, for example, for blood pressure measurement devices and smart wearable devices (e.g., smart watches or bracelets) applied in the medical field. The air bag provided by the embodiment of the disclosure can solve the problems of air bag deformation, side edge mutation, curling of inner membrane materials and the like in the process of blood pressure measurement, is stable in shape after inflation, and can ensure the accuracy of blood pressure measurement.

Fig. 4 illustrates a schematic structural view of an airbag according to some embodiments of the present disclosure. As shown in fig. 4, the balloon 100 includes a balloon body H. The bladder H comprises a first bladder portion 10, a second bladder portion 20, a third bladder portion 30 and an air tap 60. The air tap 60 is provided on one of the first and second bladder portions 10 and 20, for example the air tap 60 is provided on the first bladder portion 10.

Figure 5 showsbase:Sub>A cross-sectional view of the balloon of figure 4 along linebase:Sub>A-base:Sub>A. As shown in fig. 5, the first bladder portion 10 includes a first outer periphery 11, the second bladder portion 20 is spaced opposite the first bladder portion 10, and the second bladder portion 20 has a second outer periphery 21. In some embodiments, the first and second bladder portions 10 and 20 may be arranged substantially in parallel. In some embodiments, the first and second bladder portions 10 and 20 may have substantially the same area.

As shown in fig. 4 and 5, the third balloon portion 30 is enclosed between the first and second balloon portions 10,20, and the third balloon portion 30 has one end 31 coupled to the first outer circumference 11 and another end 33 coupled to the second outer circumference 21. Thus, the first, second and third bladder portions 10,20, 30 together enclose an inflatable chamber C. Air cap 60 is in fluid communication with inflatable chamber C of airbag 100. For clarity of illustration, the airbag is shown in FIG. 5 in an at least partially inflated condition, it being understood that when there is no gas in the inflatable chamber C, the airbag 100 will contract and have a reduced volume.

The airbag 100 includes at least one longitudinal tie 40. In some embodiments, as shown in fig. 5, the airbag 100 includes a longitudinal tie 40. The longitudinal tie 40 is disposed in the inflatable chamber C in the longitudinal direction. The longitudinal tie 40 has two ends 41, 42 coupled to the first and second bladder portions 10,20 respectively. In some embodiments, the ends 41 and 42 of the longitudinal tie 40 may be formed with a kink to increase the strength of the connection of the longitudinal tie 40 to the first and second bladder portions 10 and 20, respectively.

In some embodiments, as shown in fig. 4 and 5, the longitudinal tie 40 may extend along the thickness direction (i.e., Z direction) of the airbag 100 in an XYZ rectangular coordinate system.

In some embodiments, as shown in fig. 5, the airbag 100 may include two transverse tendons 50 disposed in the inflatable chamber C. The outer periphery of each transverse tie rib 50 is coupled to the third bladder portion 30. The transverse lacing wire 50 can avoid the problem of the airbag 100 protruding out sideways when inflated, thereby improving the accuracy of the measurement.

According to the embodiment of the present disclosure, the airbag 100 may be provided with only the transverse tie 50, only the longitudinal tie 40, or both. And the number of the lateral lacing wires 40 and/or the longitudinal lacing wires 50 can be flexibly adjusted according to the size of the airbag 100. When the air bag 100 is inflated, the existence of the lacing wire structure can prevent the upper surface and the lower surface of the air bag 100 from generating olive-shaped failure and lateral convex failure deformation.

In some embodiments, the third bladder portion 30 may include at least one connection. As shown in fig. 5, the third capsule portion 30 comprises two connecting portions 311, 312. Each connecting portion 311, 312 is recessed towards the interior of the inflatable chamber C, and each connecting portion 311, 312 is coupled to a respective transverse tie bar 50. In some embodiments, the two connections 311, 312 are superposed. The presence of the connecting portion can reduce the likelihood of the airbag 100 protruding sideways outward when inflated.

In some embodiments, each connecting portion 311, 312 can be V-shaped in cross-section, and the tip of the V-shaped connecting portion 311, 312 is coupled to the corresponding transverse lacing wire 50. The V-shaped cross-sectional connection facilitates a more neat and compact appearance of the airbag 100 when deflated, enabling the airbag 100 to be used on miniaturized wearable devices. The transverse lacing wire 50 can avoid the problem of the airbag 100 protruding out sideways when inflated, thereby improving the accuracy of the measurement.

The number of the V-shaped connecting parts can be freely adjusted according to the specific use scene of the air bag. The V-shaped connecting part of the air bag has the effect of convenient folding and storage, namely the effect of convenient storage after the air bag exhausts can be realized. In addition, the problem that the side edge protrudes outwards when the air bag is inflated can be solved by combining the transverse lacing wire.

FIG. 6 illustrates a cross-sectional view of a bladder according to further embodiments of the present disclosure. As shown in fig. 6, the first bladder portion 10 includes a first outer periphery 11 and the second bladder portion 20 is spaced from the first bladder portion 10 and has a second outer periphery 21. In some embodiments, the first and second bladder portions 10 and 20 may be arranged substantially in parallel. In some embodiments, the first and second bladder portions 10 and 20 may have substantially the same area.

As shown in fig. 6, the third bladder portion 30 is disposed between the first and second bladder portions 10,20, and one end 31 of the third bladder portion 30 is coupled to the first outer rim 11 and the other end 33 is coupled to the second outer rim 21. Thus, the first, second and third bladder portions 10,20, 30 together enclose an inflatable chamber C. For clarity of illustration, the airbag is shown in FIG. 6 in an at least partially inflated condition, it being understood that when there is no gas in the inflatable chamber C, the airbag 100 will contract and have a reduced volume.

The airbag 100 includes two longitudinal tie bars 40. Two longitudinal tie bars 40 are provided in the inflatable chamber C. Each longitudinal tie wire 40 has two ends 41, 42 coupled to the first and second bladder portions 10,20, respectively. In some embodiments, the two ends 41 and 42 of each longitudinal tie 40 may be formed with a kink to increase the strength of the connection of the longitudinal tie 40 to the first and second bladder portions 10 and 20, respectively. By means of the longitudinal lacing wire 40, the inflatable chamber C can be prevented from evolving into an olive shape when inflated, which is beneficial for improving the effective measurement size.

In some embodiments, as shown in fig. 6, each longitudinal tie 40 may extend in the thickness direction (i.e., Z direction) of the airbag 100 in an XYZ rectangular coordinate system.

There are longitudinal tie bars inside the airbag 100 and the number of longitudinal tie bars is selected according to the specific size of the airbag. During the inflation process of the airbag 100, the airbag 100 is inflated by gas pressure, and due to the existence of the longitudinal lacing wires, the swelling deformation of the upper surface and the lower surface of the airbag is limited by the lacing wires, so that the problem of olive-shaped failure on the first bag body part 5363 and the second bag body part 10,20 of the airbag can be solved.

In some embodiments, as shown in fig. 6, the airbag 100 may further include two transverse tendons 50 disposed in the inflatable chamber C. The outer periphery of each transverse tie rib 50 is coupled to the third bladder portion 30. The transverse lacing wire can avoid the problem that the side edge of the air bag 100 protrudes outwards when the air bag is inflated, so that the measurement accuracy can be improved.

The lacing wire structure is arranged in the air bag 100, the lacing wires can be formed by simultaneously arranging a longitudinal lacing wire and a transverse lacing wire, and the number of the lacing wires can also be flexibly adjusted according to the size of the air bag, so that the problem of failure of olive-shaped deformation of the upper surface and the lower surface of the air bag and failure of outward protruding deformation of the side surface of the air bag are solved.

In some embodiments, as shown in fig. 6, the third bladder portion 30 includes two connections 311, 312. Each connection portion 311, 312 is recessed towards the interior of the inflatable chamber C, and each connection portion 311, 312 is coupled to a respective transverse tie bar 50. In some embodiments, the two connections 311, 312 are superposed. The presence of the connecting portion can reduce the likelihood of the airbag 100 protruding sideways outward when inflated.

In some embodiments, each connection portion 311, 312 may be V-shaped in cross-section, and the tip of the V-shaped connection portion 311, 312 is coupled to the corresponding transverse lacing wire 50. The V-shaped cross-sectional connection portion facilitates a more neat and compact appearance of the airbag 100 when deflated, enabling the airbag 100 to be used in miniaturized wearable devices. The transverse lacing wire 50 can avoid the problem of the airbag 100 protruding out of the side edge when being inflated, thereby improving the accuracy of measurement.

The number of the V-shaped connecting parts can be freely adjusted according to the specific use scene of the air bag. The V-shaped connecting part of the air bag has the effect of convenient folding and storage, namely the effect of convenient storage after the air bag is exhausted can be realized. In addition, the problem that the side edge protrudes outwards when the air bag is inflated can be solved by combining the transverse lacing wire.

The third body portion 30 of the airbag side is a structure that facilitates folding, such as a V-shaped connection or a stack of V-shaped connections. When the air bag 100 is inflated, the first bag part 10 and the second bag part 20 are unfolded away from each other, and the third bag part 30 is elastically deformed from the contracted state to the expanded state, so that the stability of the inflation of the air bag 100 is ensured. When the air bag is deflated, the third bag body part 30 is restored from the elastic deformation state, and can drive the air bag 100 to be restored to the uninflated state, so that the air bag 100 can be freely folded and unfolded. The third bladder portion 30, in combination with the transverse lacing wire structure, may further prevent failure of the outwardly protruding deformation of the sides.

It should be understood that in embodiments according to the present disclosure, instead of one or two longitudinal tendons 40, more longitudinal tendons 40 may be provided in the airbag 100, such as three, four, five, or more, as may be determined by specific design and cost requirements. Similarly, in embodiments according to the present disclosure, instead of two transverse lacing wires 50, more or fewer transverse lacing wires 50 may be provided in the airbag 100, such as one, three, four, five, or more. Further, although two connection portions are shown in fig. 5 and 6, the number of connection portions may be one or three or more according to a practical application scenario of the airbag 100.

FIG. 7 shows a cross-sectional view of a balloon according to further embodiments of the present disclosure. The airbag 100 shown in fig. 7 has a similar structure to the airbag 100 shown in fig. 5. Only the differences between the two will be described in detail herein, and the description of the same parts will be omitted.

Referring to fig. 7, in some embodiments, the area of the bladder portion (e.g., the first bladder portion 10) of the first and second bladder portions 10 and 20 in which the air nozzles 60 are provided is greater than the area of the other bladder portion (e.g., the second bladder portion 20) of the first and second bladder portions 10 and 20. Thus, the larger size of the first bladder portion 10 for contact with the human body facilitates an increase in the effective measurement size and thus accuracy of the measurement. For example, the air tap 60 is coupled with the first capsule portion 10 and the second capsule portion 20 is coupled with the band 101 of the wearable device, and the area of the first capsule portion 10 is larger than the area of the second capsule portion 20.

In other embodiments, the air tap 60 may be coupled with the second capsule portion 20, and the first capsule portion 10 is coupled with the band 101 of the wearable device, and the area of the second capsule portion 20 is larger than the area of the first capsule portion 20.

In other embodiments, the air tap 60 may be coupled with the second capsule portion 20, and the second capsule portion 20 is coupled with the band 101 of the wearable device, and the area of the first capsule portion 10 is larger than the area of the second capsule portion 20.

Thus, certain embodiments of the present disclosure provide an airbag that is asymmetric in the up-down direction. In wearable devices that integrate blood pressure detection functionality (such as smart watches), the bladder needs to be secured in conjunction with the band. The upper and lower asymmetric balloons can be effectively combined with the strap and also maximize the effective measurement width of the balloon. In addition, the combination of the air bag and the belt is beautiful and meets the wearing requirements of users.

In some embodiments, referring to fig. 7, the first and second balloon portions 10 and 20 have the same dimension in the length direction (Y direction) of the balloon. In some embodiments, in the width direction (X direction) of the airbag 100, the first bladder portion 10 has a width W1, the second bladder portion 20 has a width W2, and W1 is greater than W2. Therefore, the airbag 100 can be applied to a miniaturized wearable device, and the first capsule portion 10 for contacting with the human body is large in size, which is beneficial to improving the effective measurement size, thereby improving the measurement accuracy.

Under the condition that the requirement on the width of a watchband of the wearable device is as small as possible, the asymmetric air bag can utilize the width of the watchband to the maximum extent, the size of the second bag body part 20 of the air bag 100 is the same as that of the watchband, and meanwhile, the first bag body part 10 of the air bag 100 is fixed on the watchband in a concealed mode, so that the wearing comfort of a user is improved.

In some embodiments, balloon 100 is a balloon for detecting blood pressure. For example, the airbag 100 may be mounted to a smart wristwatch.

FIG. 8 illustrates a schematic structural view of a balloon, with a portion of the balloon shown in cross-section, according to some embodiments of the present disclosure. Referring to fig. 8, in some embodiments, each transverse tie bar 50 is provided with an opening 51 at a location corresponding to at least one longitudinal tie bar 40. At least one longitudinal tie wire 40 is coupled to the first and second bladder portions 10 and 20, respectively, through a respective opening 51.

FIG. 9 illustrates a cross-sectional view of a balloon according to some embodiments of the present disclosure, further showing an enlarged view of a portion of the structure. In some embodiments, the second bladder portion 20 of the bladder 100 is attached to the circumferential band 101 of the wearable device, and the first bladder portion 10 of the bladder 100 contacts the human body (e.g., the wrist 10') to measure blood pressure. The airbag 100 may include at least one support rod 70, the support rod 70 being disposed in the inflatable chamber C. Upon inflation, the first bladder portion 10 of the balloon 100 may curl to form a protuberance 10, resulting in inaccurate measurements. Due to the presence of the support rod 70, the first capsule portion 10 does not completely conform to the second capsule portion 20, and therefore, no separate gas compartments are formed in the inflatable chamber C, through which gas can circulate in the direction V shown in the figures.

In some embodiments, the airbag 100 may include two support rods 70, one of which is coupled to the first bladder portion 10 and the other of which is coupled to the second bladder portion 20.

In some embodiments, the support rod 70 may be a flexible rod. The flexible rods are placed inside the air bag 100 along the circumferential direction of the wrist, so that the problems that chambers are separated independently and are not ventilated when the air bag is folded along the circumferential direction can be solved. The flexible rod material is generally plastic, such as PA.

Referring again to fig. 5-8, due to the presence of the two transverse tie bars 50, in some embodiments, the inflatable chamber C may be partitioned into sub-chambers 2a,2b,2c that are in fluid communication. The sub-chambers 2a,2b,2c may be in fluid communication with each other through openings 51 or through holes provided in the transverse lacing wire 50. The airbag 100 may include three support rods 70, each of which may be coupled to the transverse tie bars 50 of a respective sub-chamber 2a,2b,3c, or to a respective first or second bladder portion 10, 20. It should be understood that the number of the support rods 70 may be one, two or more.

When the balloon 100 is applied to a belt, the flexible rod 70 is placed inside the balloon 100, and the flexible rod 70 has flexibility in the length direction and can be circumferentially bent along with the balloon 100. For example, when worn on a human wrist, flexible rods 70 bend circumferentially with balloon 100, the circumferential band to conform to the curve of the wrist. The flexible rod 70 may be made of plastics, such as PA, ABS, PE, etc., or other flexible materials. When the first body portion 10 of the airbag 100 is folded along the circumferential direction, due to the existence of the flexible rod 70, the flexible rod 70 is located between the first body portion 10 and the second body portion 20 of the airbag at the folded position, so that a gap is created between the first body portion 10 and the second body portion 20, and the gas in the airbag 100 is communicated into a whole through the gap, so that the internal gas pressure of the inflatable chamber 2 tends to be balanced and consistent, and the problem of airbag fold air trapping is solved.

Referring again to fig. 1 and 7, the wearable device includes: a cuff 101 for attaching the wearable device to the human body, the air bag 100 described earlier, a pump and a processor. The bladder 100 is disposed on the cuff 101 and the pump is in fluid communication with the bladder air cap 60 to inflate the inflatable chamber C. The processor is for determining the blood pressure of the person wearing the device by controlling the pump to inflate the bladder.

In some embodiments, the second bladder portion 20 is coupled with the circumferential band 101 and the first bladder portion 10 is adapted to rest against the wrist of the person wearing the device.

In some embodiments, bladder H of bladder 100 is made of thermoplastic polyurethane elastomer rubber (TPU).

Fig. 10-17 illustrate a process of making an airbag according to some embodiments of the present disclosure. The manufacturing process of the airbag will be described by taking the airbag having the third body portion 30 with two connecting portions, two transverse tie bars and two longitudinal tie bars as an example, wherein fig. 10 is an exploded view of the airbag, and fig. 11 to 17 are schematic views of the high frequency welding process of the airbag.

In fig. 10 to 17: 1 denotes a first part of the airbag; 2.1 indicating a first folding edge film material; 2.3 indicating a second folded edge film material; 3.1 indicating a third folded edge film material; 3.3 indicating a fourth folded edge film material; 4 indicates the second part; 5 indicates the third part; and 6 indicates the second part and the third part in combination.

As shown in fig. 11, the first bag body portion 10 and the air nozzle 60 are welded together by one-time high-frequency welding to form the first portion 1 of the air bag.

As shown in fig. 12, the first folded edge film 2.1, the transverse tie bar 50, and the second folded edge film 2.3 are aligned and welded together by one-time high-frequency welding to form the connecting portion 311. In some embodiments, the folded edge membrane material one 2.1 and the folded edge membrane material two 2.3 are funnel-shaped, and the bottoms of the two funnels are welded together with the transverse tie 50. In some embodiments, two openings may be formed in the transverse tie bar 50.

As shown in fig. 13, the third folded edge film 3.1, the transverse tie bar 50, and the fourth folded edge film 3.3 are aligned and welded together by one-time high-frequency welding to form a connecting portion 312. In some embodiments, the folded edge membrane three 3.1 and the folded edge membrane four 3.3 are funnel shaped, with the two funnel bottoms welded together with the transverse tie 50. In some embodiments, two openings may be formed in the transverse tie bar 50.

The transverse lacing wire 50 is arranged in the air bag 100, the periphery of the transverse lacing wire 50 and the third bag body part 30 of the air bag 100 are welded into a whole by high frequency, meanwhile, the transverse lacing wire 50 is provided with a plurality of vent holes or vent groove characteristics, and the quantity of the transverse lacing wire 50 is selected according to the specific size of the air bag. During the inflation and expansion of the airbag 100, since the transverse tie bar 50 is welded to the third bag body portion 30 (for example, to the V-shaped connection portion), the outward bulging deformation of the third bag body portion 30 is limited by the transverse tie bar 50, so that the failure problem of the outward bulging deformation of the side surface does not occur.

As shown in fig. 14, the longitudinal tie bars 40 (e.g., two longitudinal tie bars 40) are aligned with the second body portion 20 and then welded together by a high cycle welding process to form the second portion 4 of the balloon.

As shown in fig. 15, the connecting portion 311 and the connecting portion 312 are aligned and stacked, and are integrally connected by one-time high-frequency welding, so as to form the third portion 5 of the airbag, and the third portion 5 forms the third bag body portion 30.

As shown in FIG. 16, the third portion 5 of the airbag is aligned with the second portion 4 of the airbag, wherein the longitudinal tie 40 is integrally connected by one high cycle welding through the opening of the transverse tie 50 to form the second and third portion assemblies 6 of the airbag. The outer periphery of the second capsule part of the second portion 4 is welded integrally to one end of the third portion 5.

As shown in fig. 17, after the second and third portions 6 of the airbag are aligned with the first portion 1 of the airbag, the longitudinal tie bar 40 is welded to the first body portion 10, and then the outer periphery of the first body portion 10 is welded to the other end of the third portion 5, so that the whole airbag is welded.

According to the airbag provided by the embodiment of the disclosure, as the side surface of the airbag is the V-shaped folding edge, when the airbag is inflated, the folding edge is elastically deformed and unfolded upwards, so that the stability of inflation and expansion of the airbag is ensured; when the air bag exhausts, the folded edge is restored from the elastic deformation state, and the air bag can be driven to be restored to the non-inflated state, so that the air bag can be folded and unfolded freely. The folding edge is combined with a transverse lacing wire structure, and the problem of convex deformation failure of the side surface can be effectively prevented.

It should be understood that although two connection portions are shown in fig. 10 to 17, the number of connection portions may be one or three or more depending on the practical application scenario of the airbag 100. Also, although two longitudinal tie bars are shown, the number of longitudinal tie bars may be set as desired. Although two transverse lacing wires are shown in the figures, the number of transverse lacing wires may be one or three or more depending on the actual application scenario of the airbag 100.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims (11)

1. An airbag, comprising:

a capsule (H) comprising:

a first bladder portion (10) having a first outer periphery (11);

a second bladder portion (20) disposed opposite and spaced from the first bladder portion (10) and having a second outer peripheral edge (21); and

a third bladder portion (30) enclosed between the first and second bladder portions (10, 20), the third bladder portion (30) having one end coupled to the first outer periphery (11) and the third bladder portion (30) having another end coupled to the second outer periphery (21), the first, second and third bladder portions (10, 20, 30) together enclosing an inflatable chamber (C);

at least one longitudinal tie wire (40) disposed in the inflatable chamber (C) along a longitudinal direction, each longitudinal tie wire (40) having two ends (41, 42) coupled to the first and second capsule portions (10, 20), respectively; and

an air tap (60) provided at said first bladder portion (10) and in fluid communication with said inflatable chamber (C).

2. The airbag of claim 1 further comprising at least one transverse tie (50) disposed in the inflatable chamber (C) in a transverse direction, an outer periphery of each transverse tie (50) being coupled to the third bladder portion (30).

3. An airbag according to claim 2 wherein each transverse tie (50) is provided with an opening (51) at a location corresponding to the at least one longitudinal tie (40), and the at least one longitudinal tie (40) is coupled to the first and second bladder portions (10, 20) through the respective opening (51).

4. An airbag according to claim 2 wherein the third bladder portion (30) comprises at least one connecting portion (311, 312), each connecting portion (311, 312) being recessed towards the interior of the inflatable chamber (C), and each connecting portion (311, 312) being coupled to a respective transverse tie-bar (50).

5. The airbag according to claim 4, characterized in that the cross section of each connecting portion (311, 312) in the longitudinal direction is V-shaped, and the tip of the V-shaped connecting portion (311, 312) is coupled to the corresponding transverse lacing wire (50).

6. The airbag of claim 4 or 5, wherein the at least one connection (311, 312) is interposed between the first and second bladder portions (10, 20).

7. An airbag according to any of claims 1 to 6, further comprising at least one support rod (70) arranged in the inflatable chamber (C).

8. The balloon according to claim 7, wherein each support rod (70) is attached to the first or second capsule portion (10, 20).

9. An air-bag according to any one of claims 1 to 8, wherein the area of the first bladder portion (10) is greater than or equal to the area of the second bladder portion (20).

10. A wearable device, comprising:

a circumferential band (101) for attaching the wearable device to a human body;

the balloon according to any of claims 1-9, provided on the circumferential band (101);

a pump in fluid communication with said air tap (60) of said air bag to inflate into said inflatable chamber (C); and

a controller for determining the blood pressure of the person wearing the device by controlling the pump to inflate the bladder.

11. Device according to claim 10, characterized in that said second capsule portion (20) is coupled with said cuff (101) and said first capsule portion (10) is adapted to rest on the wrist of the person wearing the device.

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