CN219208561U

CN219208561U - Headgear tube, mask system, and ventilation device

Info

Publication number: CN219208561U
Application number: CN202221673940.3U
Authority: CN
Inventors: 马国辉; 王亚杰; 周明钊; 庄志
Original assignee: BMC Tianjin Medical Co Ltd
Current assignee: BMC Tianjin Medical Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2023-06-20
Anticipated expiration: 2032-06-30

Abstract

The embodiment of the application provides a bandeau pipe, a mask system and ventilation equipment, relates to ventilation treatment equipment technical field. A plurality of first bulges are arranged on the inner wall of the head belt pipe according to the array, a first gap is arranged between two adjacent first bulges, and a plurality of first gaps are connected into a first airflow channel extending longitudinally along the head belt pipe.

Description

Headgear tube, mask system, and ventilation device

Technical Field

The embodiment of the application relates to the technical field of ventilation treatment equipment, in particular to a headband tube, a mask system and ventilation equipment.

Background

When a patient is undergoing ventilation therapy, it is often necessary to wear a mask that communicates with the ventilator through a headgear tube so that the ventilator can provide positive pressure gas to the patient through the headgear tube.

However, during ventilation therapy, patients often squeeze or twist the headgear tube, causing the inner walls of the headgear tube to fit together, blocking the flow of air, affecting the ventilation therapy.

Disclosure of Invention

The embodiment of the application provides a bandeau pipe, mask system and ventilation equipment for solve bandeau pipe's inner wall and laminate together technical problem easily.

In a first aspect, the present application provides a headgear tube, be equipped with a plurality of first archs according to the array arrangement on the headgear tube inner wall, adjacent two be equipped with first clearance between the first arch, a plurality of first clearance is connected into along headgear tube longitudinal extension's first air current passageway.

Optionally, the inner wall of bandeau pipe includes relative first inner wall and second inner wall, first protruding setting is in on the first inner wall, be equipped with a plurality of second archs according to the array arrangement on the second inner wall, the bellied height of second is less than the bellied height of first.

Optionally, a second gap is arranged between two adjacent second protrusions; the projection of the second bulge on the first inner wall is smaller than or equal to the projection of the first gap on the first inner wall; the projection of the first bulge on the second inner wall is smaller than or equal to the projection of the second gap on the second inner wall.

Optionally, the inner wall of the headband pipe comprises a first inner wall and a second inner wall which are opposite, the first protrusions are arranged on the first inner wall, a plurality of third protrusions which are arranged according to an array are arranged on the second inner wall, and a third gap is arranged between every two adjacent third protrusions; the projection of the third bulge on the first inner wall is smaller than the projection of the first gap on the first inner wall; the projection of the first bulge on the second inner wall is smaller than the projection of the third gap on the second inner wall.

Optionally, the height of the third protrusion is equal to the height of the first protrusion.

Optionally, the inner wall of the headband pipe comprises a first inner wall and a second inner wall which are opposite, the first protrusions are arranged on the first inner wall, a plurality of fourth protrusions which are arranged according to an array are arranged on the second inner wall, and a fourth gap is arranged between every two adjacent fourth protrusions; the projection of the fourth protrusion on the first inner wall is larger than the projection of the first gap on the first inner wall, and/or the projection of the first protrusion on the second inner wall is larger than the projection of the fourth gap on the second inner wall.

Optionally, a plurality of the fourth gaps are connected into a second air flow channel extending longitudinally along the headgear tube.

Optionally, the projections of the first protrusion and the fourth protrusion on the inner wall of the headband tube are diamond, and the projections of the fourth protrusion on the first inner wall overlap with the projections of at least three first protrusions on the first inner wall.

Optionally, the first protrusion is disposed on the first inner wall, and a projection of the first protrusion on the first inner wall is polygonal, circular or elliptical.

Optionally, when projected as a polygon, a first side of the polygon is parallel to an axis of the headband tube, and the first sides of two polygons adjacent in a longitudinal direction of the headband tube are collinear.

Optionally, the polygon includes a diamond, a rectangle, and a triangle.

In a second aspect, the present application provides a mask system comprising the headgear tube.

In a third aspect, the present application provides a ventilation device comprising the mask system.

The utility model provides a bandeau pipe, face guard system and ventilation equipment, bandeau pipe takes place elastic deformation when the bandeau pipe receives the extrusion, makes the opposite both sides of bandeau pipe inner wall be close to gradually. Because be equipped with a plurality of first archs on the inner wall, when the inner wall contacted first bellied top surface, first arch supported the inner wall to prevent bandeau pipe inner wall relative both sides and continue to be close to, prevent bandeau pipe inner wall laminating. And form the first air current passageway that extends along bandeau pipe longitudinal direction between a plurality of first archs, make the positive pressure air current can pass through bandeau pipe extrusion's region along first air current passageway, solved bandeau pipe extrusion and blocked the problem of positive pressure air current.

Drawings

FIG. 1 is a schematic illustration of an embodiment of a headgear tube according to the present application, prior to deformation;

FIG. 2 is a schematic view of the headband tube of FIG. 1 after deformation;

FIG. 3 is a schematic illustration of an embodiment of a headgear tube according to the present application after compression deformation;

FIG. 4 is a schematic view of the headband tube of FIG. 3 after torsional deformation;

FIG. 5 is a schematic view of a headgear tube embodiment according to the present application after torsional deformation;

FIG. 6 is a schematic view of a portion of a headgear tube embodiment provided herein;

FIG. 7 is an expanded view of the headgear tube shown in FIG. 6;

FIG. 8 is a schematic view of one arrangement of the first and third projections after torsional deformation of the headband tube;

FIG. 9 is a schematic view of a headgear tube according to the present application;

FIG. 10 is a schematic view of a portion of the headgear tube shown in FIG. 9;

FIG. 11 is a schematic view of a portion of the headgear tube shown in FIG. 9;

FIG. 12 is an expanded view of the headgear tube shown in FIG. 9;

FIG. 13 is an enlarged view of a portion of FIG. 12;

fig. 14 is a schematic view showing one arrangement of the first protrusion and the fourth protrusion after the headband tube shown in fig. 9 is torsionally deformed.

Reference numerals:

10-a first inner wall; 20-a second inner wall;

11-a first bump; 11 a-a first gap;

21-a second bump; 22-a third protrusion; 23-fourth bump.

Detailed Description

The ventilation device provided by the application refers to a device which can perform ventilation treatment on a patient, such as a device which performs ventilation treatment by adopting a non-invasive positive pressure ventilation mode or a device which performs ventilation treatment by adopting an invasive positive pressure ventilation mode. For convenience of description, the following will be given by way of example only in which the ventilation therapy apparatus is an apparatus for performing ventilation therapy by means of non-invasive positive pressure ventilation.

Non-invasive positive airway pressure is widely used in the adjuvant treatment of obstructive sleep apnea, chronic obstructive emphysema, etc. conditions, which do not require surgical insertion of a tube into the airway of a patient, but rather use a blower to deliver a continuous or variable pressure airway (e.g., bi-level pressure that varies with the patient's respiratory cycle, or automatic pressure regulation that varies with patient monitoring conditions) to the patient's airway via tubing and patient interface devices. Such pressure-supported therapies are also commonly used for obstructive sleep hypopnea, upper airway resistance syndrome, congestive heart failure, or the like.

The ventilation device includes a mask system and a blower device. The mask system may include a respiratory mask (e.g., nasal mask, oral-nasal mask, nasal pillow mask, full face mask, etc.) that is worn on the face of the patient and communicates with the patient's airways, and a headgear tube that communicates with the respiratory mask and the blower device. In the treatment process, the blower device outputs a positive pressure air flow, and the positive pressure air flow is sequentially conveyed into the airway of the patient through the head belt tube and the breathing mask.

Among other things, respiratory masks generally include a frame, a cushion, and an elbow. The frame may be a rigid shell that is secured to the patient's face by a headgear. A cushion is positioned between the patient's face and the frame to increase the seal between the frame and the patient's face. The cushion may be internally provided with a cavity to increase the amount of elastic deformation of the cushion, improving the comfort of wear while improving the tightness of the frame and patient's face. The bent pipe is connected with one end of the head band pipe so that the space enclosed by the frame and the face of the patient is communicated with the head band pipe. The other end of the headband tube may be connected to the blower device through an intermediate piece, elbow, or manifold.

During ventilation treatment, the patient can easily squeeze or twist the headgear tube when moving, which causes the inner walls of the headgear tube to fit together, thereby blocking positive pressure air flow. Particularly, when a patient performs ventilation treatment during sleeping, the patient turns over or arms are carried on the head belt tube, so that the head belt tube is extruded or twisted.

In view of this, the present application provides a ventilation apparatus, as shown in fig. 1 to 14, in which a plurality of first protrusions 11 arranged in an array are provided on an inner wall of a headband pipe in the ventilation apparatus, a first gap 11a is provided between two adjacent first protrusions 11, and the plurality of first gaps 11a are connected to form a first air flow channel extending longitudinally along the headband pipe.

The headband tube can be made of flexible materials, such as silica gel, foam, fabric and the like, can elastically deform when the headband tube is subjected to external force, and can recover when the external force is eliminated. The headband tube may also be made of a water vapor impermeable material to prevent condensation of a large amount of water droplets within the headband tube.

The first protrusion 11 is a protrusion facing the inside of the headband tube, and the material of the first protrusion 11 may be the same as or different from the material of the inner wall, and may be flexibly selected according to the processing technology, the use environment, etc. during practical application. The first protrusions 11 may be formed by die cutting, ultrasonic cutting, thermoforming, or the like.

When the headband tube is extruded, the headband tube is elastically deformed, so that two opposite sides of the inner wall of the headband tube are gradually close to each other. Because be equipped with a plurality of first archs 11 on the inner wall, when the inner wall contacted the top surface of first arch 11, first arch 11 supported the inner wall to prevent bandeau intraductal wall relative both sides and continue to be close to, prevent bandeau intraductal wall laminating. And the first air flow channels extending longitudinally along the head band pipe are formed among the first bulges 11, so that positive pressure air flow can pass through the extruded area of the head band pipe along the first air flow channels, and the problem that the head band pipe is extruded to block the positive pressure air flow is solved.

It should be noted that, the first air flow channel extends along the longitudinal direction of the headband tube means that the first air flow channel extends along the longitudinal direction of the headband tube, and part or all of the first air flow channel may form an included angle with the longitudinal direction of the headband tube.

As shown in fig. 1 and 2, the inner wall of the headband tube may include opposite first and second

inner walls

10 and 20, with first protrusions 11 provided on the first inner wall 10. The first inner wall 10 and the second inner wall 20 may be an integral structure, for example, a circular tube formed integrally with the headband tube, and a virtual plane coplanar with the central axis of the headband tube divides the circular tube into the first inner wall 10 and the second inner wall 20 opposite to each other. The first inner wall 10 and the second inner wall 20 may be of a split structure before the headband pipe is manufactured, for example, the first inner wall 10 and the second inner wall 20 are in a sheet shape, one side of the first inner wall 10 is connected with one side of the second inner wall 20, and the other side of the first inner wall 10 is connected with the other side of the second inner wall 20, so that the headband pipe is manufactured. The structure and the molding method of the first inner wall 10 and the second inner wall 20 are not limited in this application.

In order to increase the ventilation area when the headband pipe is extruded and deformed and reduce the flow resistance of positive pressure air flow, protrusions may be provided on the second inner wall 20, and when the headband pipe is extruded and deformed, the first protrusions 11 are in contact with the protrusions on the second inner wall 20, so that the interval between the first inner wall 10 and the second inner wall 20 may be increased. However, the headband tube is deformed by being pressed by an external force during use, and is deformed by being twisted by an external force in some cases. Fig. 3 is a schematic view of an embodiment of a headband tube according to the present application after being deformed by compression, wherein the direction of the arrow is the direction of movement of the protrusion on the second inner wall 20. Fig. 4 is a schematic view of the headband tube of fig. 3 after torsional deformation. As shown in fig. 3 and 4, the first inner wall 10 and the second inner wall 20 are relatively translated during torsion, so that the protrusions on the second inner wall 20 are embedded into the first gaps 11a, and the protrusions on the first protrusions 11 and the second inner wall 20 are staggered with each other, that is, the protrusions on the second inner wall 20 are embedded into the first air flow channel, so that the first air flow channel is blocked.

In view of this, the arrangement, structure, and size of the protrusions on the first protrusion 11 and the second inner wall 20 are set to solve the problem of the first air flow channel blocking when the headband pipe is torsionally deformed. The headgear tube of the present application will be described in detail with reference to the following different scenarios.

Scene one

FIG. 3 is a schematic illustration of an embodiment of a headgear tube according to the present application after compression deformation; FIG. 4 is a schematic view of the headband tube of FIG. 3 after torsional deformation; fig. 5 is a schematic view of an embodiment of a headgear tube according to the present application after torsional deformation. As shown in fig. 3 to 5, the headband tube includes a first inner wall 10 and a second inner wall 20 opposite to each other, a plurality of first protrusions 11 are arranged on the first inner wall 10 in an array, a first gap 11a is provided between two adjacent first protrusions 11, and the plurality of first gaps 11a are connected to form a first air flow channel extending longitudinally along the headband tube. The second inner wall 20 is provided with a plurality of second bulges 21 which are arrayed, and a second gap is arranged between two adjacent second bulges 21. The height of the second protrusions 21 is smaller than the height of the first protrusions 11.

The second protrusion 21 is a protrusion facing the inner portion of the headband tube, and the material of the second protrusion 21 may be the same as or different from the material of the second inner wall 20, and may be flexibly selected according to the processing technology, the use environment, and the like in practical application.

Since the height of the second protrusion 21 is smaller than the height of the first protrusion 11, the second protrusion 21 cannot contact the first inner wall 10, so that a gap is left between the top surface of the second protrusion 21 and the first inner wall 10, allowing the positive pressure air flow to pass through.

The height difference between the first protrusion 11 and the second protrusion 21 may be flexibly set according to the size of the headband pipe and the actual ventilation amount, for example, when the diameter of the headband pipe is large, the height difference between the first protrusion 11 and the second protrusion 21 is large, and when the diameter of the headband pipe is small, the height difference between the first protrusion 11 and the second protrusion 21 is small.

Since the heights of the first protrusion 11 and the second protrusion 21 are different, it is possible to process the first protrusion 11 on the first inner wall 10, process the second protrusion 21 on the second inner wall 20, and then connect the first inner wall 10 and the second inner wall 20 into a headband tube, for example, by heat fusion or bonding. Thus, the processing difficulty of the headband tube can be reduced. Wherein the first protrusions 11 and the second protrusions 21 may be formed by die cutting, ultrasonic cutting, thermoforming, or the like.

In some embodiments, the projection of the second protrusion 21 on the first inner wall 10 may be less than or equal to the projection of the first gap 11a on the first inner wall 10, and the projection of the first protrusion 11 on the second inner wall 20 may be less than or equal to the projection of the second gap on the second inner wall 20.

The projection of the second protrusion 21 on the first inner wall 10 refers to the projection of the second protrusion 21 on the first inner wall 10 after the deformation of the ribbon tube. For example, the deformed first inner wall 10 and the second inner wall 20 are parallel, and the projection of the second protrusion 21 on the first inner wall 10 is equal to the cross section of the second protrusion 21.

The projection of the second protrusion 21 on the first inner wall 10 is smaller than or equal to the projection of the first gap 11a on the first inner wall 10, which means that the projection contour of the second protrusion 21 is completely contained in the projection contour of the first gap 11a, and is not a size relationship of single-finger projection areas.

The projection of the second projection 21 is smaller than or equal to the projection of the first gap 11a, that is, the second projection 21 may be embedded in the first gap 11 a. Similarly, the first protrusions 11 may be embedded in the second gap. Thus, the first protrusion 11 and the second protrusion 21 can be inserted into each other, and the first inner wall 10 and the second inner wall 20 can be prevented from being further displaced after the headband pipe is deformed.

The headband pipe may be deformed by being pressed by an external force or may be deformed by being twisted, and thus the headband pipe includes a pressed state and a twisted state. The first inner wall 10 and the second inner wall 20 are close together in the extrusion deformation state, and the first inner wall 10 and the second inner wall 20 are close together and staggered in the torsion deformation state. The first protrusions 11 and the second protrusions 21 may be aligned in the press-deformed state and staggered in the twist-deformed state. Of course, the first protrusions 11 and the second protrusions 21 may be staggered in the press-deformed state and aligned in the twist-deformed state. For convenience of description, only the first protrusions 11 and protrusions on the second inner wall 20 are explained by way of example while being staggered in a twisted state.

Fig. 5 is a schematic view of an embodiment of a headgear tube according to the present application after torsional deformation. As shown in fig. 5, the projections of the first protrusions 11 and the second protrusions 21 are rectangular with the same size, and the array arrangement of the first protrusions 11 and the second protrusions 21 is the same, and the first protrusions 11 and the second protrusions 21 are staggered one by one in the torsional deformation state.

Of course, the projections of the first protrusions 11 and the second protrusions 21 may be diamond, square, triangle, or other polygons. When the projections of the first protrusions 11 and the second protrusions 21 are polygonal, the shapes are more regular, and the processing difficulty is reduced. The projections of the first projection 11 and the second projection 21 may also be circular, elliptical, etc. The first protrusion 11 and the second protrusion 21 may have the same shape or may have different shapes.

When the projection of the first projection 11 and/or the second projection 21 is a polygon, the first sides of the polygons are parallel to the axis of the headband tube, and the first sides of two polygons adjacent in the longitudinal direction of the headband tube are collinear. The first gas flow channel is formed by the connection of the first gaps 11a, so that the direction of extension of the first gaps 11a determines the direction of flow of the gas in the first gas flow channel. When the first sides of the polygons are parallel to the axis of the headband tube, the extending direction of the first gaps 11a formed by the two adjacent first protrusions 11 is also parallel to the axis of the headband tube, so that the resistance of airflow is reduced. When the first sides of the two polygons adjacent to each other in the longitudinal direction of the headband pipe are collinear, the first gaps 11a adjacent to each other in the longitudinal direction of the headband pipe are collinear, and thus the airflow resistance is reduced.

Scene two

FIG. 6 is a schematic view of a portion of a headgear tube embodiment provided herein; FIG. 7 is an expanded view of the headgear tube shown in FIG. 6; fig. 8 is a schematic view showing an arrangement of the first protrusion and the third protrusion after the headband tube is torsionally deformed. As shown in fig. 6 to 8, the headband tube includes a first inner wall 10 and a second inner wall 20 opposite to each other, a plurality of first protrusions 11 are arranged on the first inner wall 10 in an array, a first gap 11a is provided between two adjacent first protrusions 11, and the plurality of first gaps 11a are connected to form a first air flow channel extending longitudinally along the headband tube. The second inner wall 20 is provided with a plurality of third protrusions 22 arranged in an array, and a third gap is arranged between two adjacent third protrusions 22. The projection of the third protrusion 22 on the first inner wall 10 is smaller than the projection of the first gap 11a on the first inner wall 10, and the projection of the first protrusion 11 on the second inner wall 20 is smaller than the projection of the third gap on the second inner wall 20.

The third protrusion 22 is a protrusion facing the inner portion of the headband tube, and the material of the third protrusion 22 may be the same as or different from the material of the second inner wall 20, and may be flexibly selected according to the processing technology, the use environment, and the like in practical application.

The projection of the third protrusion 22 on the first inner wall 10 refers to the projection of the third protrusion 22 on the first inner wall 10 after the deformation of the ribbon tube. For example, after deformation, the first inner wall 10 and the second inner wall 20 are parallel, and the projection of the third protrusion 22 on the first inner wall 10 is equal to the cross section of the third protrusion 22.

The projection of the third protrusion 22 on the first inner wall 10 is smaller than the projection of the first gap 11a on the first inner wall 10, which means that the projection contour of the third protrusion 22 is completely contained in the projection contour of the first gap 11a, and is not a size relationship of single-finger projection areas.

The projection of the third protrusion 22 is smaller than the projection of the first gap 11a, that is, the third protrusion 22 may be embedded in the first gap 11a or the first air flow channel, and the first gap 11a or the first air flow channel is not completely filled, and a gap remains so that the positive pressure air flow can pass through the gap.

The projection of the third protrusion 22 in this scenario is smaller than the projection of the first gap 11a, which means that the projection of the third protrusion 22 is far smaller than the projection of the first gap 11a, so that after the space of the first gap 11a is occupied by the third protrusion 22, the remaining space can still meet the ventilation requirement of the headband tube, that is, the first gap 11a is larger. Similarly, the third gap is also set larger.

In addition, because the first gap 11a and the third gap are larger, the number of the first protrusions 11 and the third protrusions 22 is reduced, the processing difficulty is reduced, and the gas flow resistance when the headband pipe is not deformed is reduced.

The height of the fourth protrusion 23 may be equal to the height of the first protrusion 11. Thus, when the headband pipe is in a torsion deformation state, the top surface of the first protrusion 11 is supported on the second inner wall 20, and the top surface of the third protrusion 22 is supported on the first inner wall 10, so that the structure of the headband pipe in the torsion deformation state is more stable, the capability of resisting external force deformation is increased, and the first inner wall 10 and the second inner wall 20 are not easy to continuously approach.

As shown in fig. 6, the first protrusions 11 and the third protrusions 22 are oval with the same size, and the array arrangement modes of the first protrusions 11 and the third protrusions 22 are the same, after the headband tube is deformed, the first protrusions 11 and the third protrusions 22 are staggered, gaps are formed between the first protrusions 11 and the third protrusions 22, and positive pressure airflow can flow in the gaps.

Of course, the first protrusion 11 and the third protrusion 22 may be circular, or may be polygonal such as triangle, rectangle, diamond, etc. The first protrusion 11 and the third protrusion 22 may have the same shape or may have different shapes.

When the projection of the first projection 11 and/or the third projection 22 is a polygon, the first sides of the polygons are parallel to the axis of the headband tube, and the first sides of two polygons adjacent in the longitudinal direction of the headband tube are collinear. The first protrusion 11 and the third protrusion 22 together enclose a channel through which the gas flow passes, so that the direction of extension of the edges of the first protrusion 11 and the second protrusion 21 determines the direction of flow of the gas. When the first edge of the polygon is parallel to the axis of the headband pipe, the extending direction of the airflow channel is also parallel to the axis of the headband pipe, so that the resistance of airflow is reduced. When the first sides of the two polygons adjacent to each other in the longitudinal direction of the headband pipe are collinear, the first gaps 11a adjacent to each other in the longitudinal direction of the headband pipe are collinear, and thus the airflow resistance is reduced.

Scene three

FIG. 9 is a schematic view of a headgear tube according to the present application; FIG. 10 is a schematic view of a portion of the headgear tube shown in FIG. 9; FIG. 11 is a schematic view of a portion of the headgear tube shown in FIG. 9; FIG. 12 is an expanded view of the headgear tube shown in FIG. 9; FIG. 13 is an enlarged view of a portion of FIG. 12; fig. 14 is a schematic view showing one arrangement of the first protrusion and the fourth protrusion after the headband tube shown in fig. 9 is torsionally deformed. As shown in fig. 9 to 14, the headband tube includes a first inner wall 10 and a second inner wall 20 opposite to each other, a plurality of first protrusions 11 are arranged on the first inner wall 10 in an array, a first gap 11a is provided between two adjacent first protrusions 11, and the plurality of first gaps 11a are connected to form a first air flow channel extending longitudinally along the headband tube. The second inner wall 20 is provided with a plurality of fourth bulges 23 which are arrayed, and fourth gaps are arranged between two adjacent fourth bulges 23. The projection of the fourth protrusion 23 on the first inner wall 10 is larger than the projection of the first gap 11a on the first inner wall 10 and/or the projection of the first protrusion 11 on the second inner wall 20 is larger than the projection of the fourth gap on the second inner wall 20.

The fourth protrusion 23 is a protrusion facing the inside of the headband tube, and the material of the fourth protrusion 23 may be the same as or different from the material of the second inner wall 20, and may be flexibly selected according to the processing technology, the use environment, and the like in practical application.

The projection of the fourth protrusion 23 on the first inner wall 10 refers to the projection of the fourth protrusion 23 on the first inner wall 10 after the deformation of the ribbon tube. For example, the deformed first inner wall 10 and the second inner wall 20 are parallel, and the projection of the fourth protrusion 23 on the first inner wall 10 is equal to the cross section of the fourth protrusion 23.

The projection of the fourth protrusion 23 on the first inner wall 10 is larger than the projection of the first gap 11a on the first inner wall 10, which means that the projection contour of the fourth protrusion 23 at least partially protrudes from the projection contour of the first gap 11a, that is, the fourth protrusion 23 cannot be embedded in the first gap 11a, and does not refer to the size relationship of the projection area alone. The projection of the first protrusion 11 on the second inner wall 20 being larger than the projection of the fourth gap on the second inner wall 20 means that the projection profile of the first protrusion 11 at least partially protrudes beyond the projection profile of the fourth gap, i.e. the first protrusion 11 cannot fit into the fourth gap. Thus, after the headband tube is deformed, the top surface of the first protrusion 11 is in contact with the top surface of the fourth protrusion 23.

Since the fourth protrusion 23 cannot be fitted into the first gap 11a, the ventilation area of the first air flow passage connected by the first gap 11a is not affected, and positive pressure air flow can flow through the first air flow passage.

The first gap 11a cannot be set too small to prevent the ventilation requirement from being satisfied. The utility model can be flexibly arranged according to the ventilation and the size of the head band pipe channel in practical application.

The fourth plurality of gaps may be connected to a second airflow path extending longitudinally along the headgear tube. After the headband tube deforms, the first airflow channel and the second airflow channel jointly bear the function of ventilation, so that the ventilation area is increased, and the airflow resistance is reduced.

The structures and array arrangements of the first and fourth protrusions 11 and 23 may be the same. Thus, the complexity of the structure can be reduced, and the processing difficulty is reduced.

Fig. 9 to 14 show the case where the first protrusions 11 and the fourth protrusions 23 are diamond-shaped, but of course, the first protrusions 11 and the fourth protrusions 23 may be triangular, rectangular, or other polygons.

When projected as a polygon, the first sides of the polygons are parallel to the axis of the headband tube, and the first sides of two polygons adjacent in the longitudinal direction of the headband tube are collinear.

The first gas flow channel is formed by the connection of the first gaps 11a, so that the direction of extension of the first gaps 11a determines the direction of flow of the gas in the first gas flow channel. When the first sides of the polygons are parallel to the axis of the headband tube, the extending direction of the first gaps 11a formed by the two adjacent first protrusions 11 is also parallel to the axis of the headband tube, so that the resistance of airflow is reduced. When the first sides of the two polygons adjacent to each other in the longitudinal direction of the headband pipe are collinear, the first gaps 11a adjacent to each other in the longitudinal direction of the headband pipe are collinear, and thus the airflow resistance is reduced.

Similarly, the second air flow channel is formed by connecting the fourth gaps, and when the projected first sides of the fourth protrusions 23 are parallel to the axis of the headband tube and the first sides of the two polygons adjacent to each other in the longitudinal direction of the headband tube are collinear, the air flow resistance can be reduced.

Wherein, when the projections of the first protrusion 11 and the fourth protrusion 23 on the inner wall of the headband tube are diamond-shaped, the projections of the fourth protrusion 23 on the first inner wall 10 may overlap with the projections of at least three first protrusions 11 on the first inner wall 10. That is, the fourth protrusion 23 is supported by at least three first protrusions 11. The three first protrusions 11 support the fourth protrusion 23 together, making the fourth protrusion 23 more stable.

As shown in fig. 14, each of the fourth projections 23 is supported by four first projections 11.

It is understood that the first protrusion 11 and the fourth protrusion 23 may also be circular, oval, etc. The shapes of the first protrusion 11 and the fourth protrusion 23 may be the same or different.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or terminal device comprising the element.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The head band tube is characterized in that a plurality of first bulges are arranged on the inner wall of the head band tube in an array manner, a first gap is arranged between two adjacent first bulges, and the first gaps are connected into a first airflow channel extending longitudinally along the head band tube.

2. The headgear tube of claim 1, wherein the inner wall of the headgear tube comprises opposing first and second inner walls, the first protrusion being disposed on the first inner wall, the second inner wall being provided with a plurality of second protrusions arranged in an array, the second protrusions having a height that is less than the height of the first protrusions.

3. The headgear tube of claim 2, wherein a second gap is provided between two adjacent second projections;

the projection of the second bulge on the first inner wall is smaller than or equal to the projection of the first gap on the first inner wall; the projection of the first bulge on the second inner wall is smaller than or equal to the projection of the second gap on the second inner wall.

4. The headband tube of claim 1, wherein the inner wall of the headband tube comprises a first inner wall and a second inner wall which are opposite, the first protrusion is arranged on the first inner wall, a plurality of third protrusions arranged in an array are arranged on the second inner wall, and a third gap is arranged between two adjacent third protrusions;

the projection of the third bulge on the first inner wall is smaller than the projection of the first gap on the first inner wall; the projection of the first bulge on the second inner wall is smaller than the projection of the third gap on the second inner wall.

5. The headgear tube of claim 4, wherein the third projection has a height equal to the height of the first projection.

6. The headband tube of claim 1, wherein the inner wall of the headband tube comprises a first inner wall and a second inner wall which are opposite, the first protrusion is arranged on the first inner wall, a plurality of fourth protrusions arranged in an array are arranged on the second inner wall, and a fourth gap is arranged between two adjacent fourth protrusions;

the projection of the fourth protrusion on the first inner wall is larger than the projection of the first gap on the first inner wall, and/or the projection of the first protrusion on the second inner wall is larger than the projection of the fourth gap on the second inner wall.

7. The headgear tube of claim 6, wherein a plurality of the fourth gaps are connected to form a second air flow channel extending longitudinally along the headgear tube.

8. The headgear tube of claim 6, wherein the projections of the first projection and the fourth projection on the inner wall of the headgear tube are diamond shaped and the projections of the fourth projection on the first inner wall overlap at least three projections of the first projection on the first inner wall.

9. The headgear tube of claim 2, wherein the first projection is disposed on the first inner wall, and wherein a projection of the first projection on the first inner wall is polygonal, circular, or elliptical.

10. The headgear tube of claim 9, wherein a first edge of the polygon is parallel to an axis of the headgear tube when projected as a polygon, and the first edges of two adjacent polygons along a longitudinal direction of the headgear tube are collinear.

11. The headgear tube of claim 9, wherein the polygons comprise diamonds, rectangles, and triangles.

12. A mask system comprising the headgear tube of any one of claims 1-11.

13. A ventilation device comprising the mask system of claim 12.