CN219001600U

CN219001600U - Respiratory mask and ventilation device

Info

Publication number: CN219001600U
Application number: CN202221674113.6U
Authority: CN
Inventors: 马国辉; 王亚杰
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: 2023-05-12
Anticipated expiration: 2032-06-30

Abstract

The embodiment of the application provides a respirator and ventilation equipment, relates to ventilation equipment technical field. The breathing mask comprises an interface component, a head belt pipe and a strap; the interface component is used for being worn on the face of a user to be communicated with the breathing airway of the user; the head band pipe comprises a head band part and a connecting part, the head band part is at least partially worn on the top of the head of a user, the connecting part is communicated with the interface assembly, the head band part is communicated with the connecting part through a first bending part positioned on the left side of the head of the user and a second bending part positioned on the right side of the head of the user, and the bending angles of the first bending part and the second bending part face to the back of the head of the user; the strap is used for being worn behind the head of a user, the first end of the strap is connected to the first bending part, and the second end of the strap is connected to the second bending part; the length of the binding band is adjusted to adjust the bending angles of the first bending part and the second bending part and the front and back positions of the first bending part and the second bending part on the head of the user.

Description

Respiratory mask and ventilation device

Technical Field

The embodiment of the application relates to the technical field of ventilation equipment, in particular to a breathing mask and ventilation equipment.

Background

Ventilation devices typically include a respiratory mask for wearing on the face of a user and a ventilator in communication with the respiratory mask through tubing such that gas generated by the ventilator is provided to the user through the respiratory mask.

Some respiratory masks include a headgear tube that partially encircles the user's head when the respiratory mask is worn. However, the size of the head of the user is different, when the size of the head of the user is large, the head band is worn more tightly, and when the size of the head of the user is small, the head band is worn more loosely. That is, a mismatch in the size of the user's head and the size of the headgear tube may result in a poor wearing experience of the respiratory mask.

Disclosure of Invention

The embodiment of the application provides a breathing mask and ventilation equipment for solve the relatively poor problem of wearing experience of breathing mask that leads to when user's size and bandeau pipe size mismatch.

In a first aspect, the present application provides a respiratory mask comprising an interface assembly, a headgear tube, and a strap; the interface assembly is adapted to be worn on the face of a user to communicate with the respiratory airways of the user; the head band tube comprises a head band part and a connecting part, wherein the head band part is at least partially worn on the top of the head of a user, the connecting part is communicated with the interface assembly, the head band part is communicated with the connecting part through a first bending part positioned on the left side of the head of the user and a second bending part positioned on the right side of the head of the user, and the bending angles of the first bending part and the second bending part face to the back of the head of the user; the first end of the strap is connected to the first bending part, and the second end of the strap is connected to the second bending part; the length of the binding band is adjusted so as to adjust the bending angles of the first bending part and the second bending part and the front and back positions of the heads of the users.

Optionally, the first bending portion and/or the second bending portion includes a bending tube, a side of the bending tube facing the head of the user is provided with a concave structure concave toward the inside of the bending tube, and a side of the bending tube facing the back of the head of the user is not provided with the concave structure.

Optionally, a plurality of concave structures are arranged on one side of the bending tube facing the front of the user, and each concave structure is arranged at intervals along the length direction of the bending tube.

Optionally, the bending modulus of the side of the bending tube facing the front of the user is smaller than the bending modulus of the side of the bending tube facing the back of the user's head.

Optionally, the first bending portion and/or the second bending portion comprises an articulated joint.

Optionally, the hinged joint comprises a first connecting pipe and a second connecting pipe, and the first connecting pipe is rotatably sleeved on the outer wall of the second connecting pipe; the first connecting pipe is communicated with the head band part, and the second connecting pipe is communicated with the connecting part; alternatively, the first connection pipe communicates with the connection portion, and the second connection pipe communicates with the headband portion.

Optionally, the belt is an elastic belt.

Optionally, a protruding piece is arranged on one side of the first bending part and/or one side of the second bending part, which faces to the rear of the user, and the strap is connected to the protruding piece.

Optionally, the cross section of the headband tube is elliptical, racetrack-shaped or D-shaped.

In a second aspect, the present application provides a ventilation apparatus comprising a respiratory mask as described.

The utility model provides a respirator and ventilation equipment through adjustment band length for bandeau portion and connecting portion can take place relative bending through first kink and second kink, thereby adjust bandeau pipe at the fixed position of user's head and bandeau portion and the contained angle between two parts of connecting portion, satisfy different head size users' wearing travelling comfort and experience sense, guarantee interface assembly and user face contact's leakproofness simultaneously, guarantee respirator's result of use. When the size of the user's head is large, the binding band can be relatively elongated, so that the first bending part and the second bending part are positioned relatively in front of the side surface of the user's head, and the bending angle is large, and therefore the interface assembly and the head band tube can be tightly connected to the user's head. When the size of the user's head is smaller, the binding band can be contracted relatively, so that the first bending part and the second bending part are positioned at the positions of the side surfaces of the user's head relatively rearwards, and the bending angle is smaller, thereby keeping the interface assembly and the head band tube tightly connected to the user's head.

Drawings

FIG. 1 is a simplified illustration of an embodiment of a respiratory mask provided herein after being worn;

FIG. 2 is a simplified diagram of a second embodiment of a respiratory mask provided herein after being worn;

FIG. 3 is an isometric view of a respiratory mask according to a first embodiment;

FIG. 4 is a front view of a respiratory mask according to an embodiment I;

FIG. 5 is a left side view of a respiratory mask according to an embodiment;

FIG. 6 is a schematic illustration of a safety valve seat in an embodiment of a respiratory mask according to the present application;

FIG. 7 is a schematic diagram II of a safety valve seat in an embodiment of a respiratory mask provided herein;

FIG. 8 is a schematic illustration of a first articulation joint of a respiratory mask according to the second embodiment;

FIG. 9 is a schematic illustration of a second hinged joint of the respiratory mask of the second embodiment;

fig. 10 is a cross-sectional view of an articulation joint of a respiratory mask in accordance with a second embodiment.

Reference numerals:

11-a headband portion; 12-connecting part; 13-a recessed structure; 14-tabs; 15-through holes; 16-a hinged joint; 16 a-a first take-over; 16 b-a second take-over;

a 20-interface assembly;

30-a safety valve seat; 31-snap connection; 32-mounting holes; 33-valve cavity; 34-connection port; 35-vent holes;

40-bending the pipe; 41-middleware.

Detailed Description

Non-invasive positive airway pressure therapy is widely used in the adjuvant treatment of obstructive sleep apnea, chronic obstructive emphysema, etc. conditions, which does not require surgical insertion of a tube into the patient's airway, but instead communicates the ventilator to the patient's respiratory airway through a respiratory mask worn on the patient's face, thereby delivering a continuous or variable pressure ventilation (e.g., bi-level pressure that varies with the patient's respiratory cycle, or automatically regulated ventilation that varies with patient monitoring conditions) to the patient's airway using the ventilator. Such non-invasive positive airway pressure therapy is also commonly used for obstructive sleep hypopnea, upper airway resistance syndrome, congestive heart failure, or the like.

The ventilation devices provided herein may include a respiratory mask and a ventilator that may provide ventilation therapy to a user, such as the non-invasive positive pressure ventilation therapy described above. When the breathing mask is used, the breathing mask is worn on the face of a user, and the breathing machine is communicated with the breathing mask through the connecting pipeline, so that gas generated by the breathing machine is conveyed to the user through the connecting pipeline and the breathing mask.

The ventilator and the connecting pipeline for connecting the ventilator and the breathing mask can refer to the content in the prior art, and the application is not limited to the content, so long as the gas with preset pressure and flow can be generated according to the actual use requirement, and the gas can be conveyed to the breathing mask through the connecting pipeline.

The respiratory mask may include a headgear tube that partially encircles the user's head when the respiratory mask is worn by the user. For example, the headband tube is bent into a U-shape, the bent portion of the U is sleeved on the top of the user's head, one leg of the U is located on the left side of the user's face, and the other leg is located on the right side of the user's face.

During application, it was found that the length of the headband tubes of the prior art was constant, and the size of the head of the different users was different. This results in a tighter headband when the size of the user's head is larger and a looser headband when the size of the user's head is smaller. That is, mismatch in the size of the user's head and the size of the headgear tube can result in a poor wearing experience for the respiratory mask, and can affect the tightness between the interface assembly user's face, particularly when the headgear tube is worn loosely, thereby affecting the performance of the respiratory mask.

In view of this, in this embodiment of the present application, the headband pipe includes a headband portion and a connection portion, the headband portion is worn at least partially on the top of the user's head, the connection portion is communicated with the interface assembly, and the headband portion is communicated with the connection portion through a first bending portion located on the left side of the user's head and a second bending portion located on the right side of the user's head, where the bending angles of the first bending portion and the second bending portion face the back of the user's head.

The respirator also comprises a strap, wherein the strap is used for being worn behind the head of the user, the first end of the strap is connected with the first bending part, and the second end of the strap is connected with the second bending part. The length of the binding belt can be adjusted to adjust the bending angles of the first bending part and the second bending part and the front and back positions of the first bending part and the second bending part on the head of the user.

Fig. 1 is a simplified diagram of a first embodiment of a respiratory mask provided herein after being worn, and fig. 2 is a simplified diagram of a second embodiment of a respiratory mask provided herein after being worn. Wherein the size of the user's head is larger in fig. 1 and smaller in fig. 2. As shown in fig. 1 and 2, the position of the user's face for wearing the interface module is simplified to point a, the position of the head band 11 for wearing the headband tube on the top of the user's head is simplified to point B, the position of the user's back for wearing the band is simplified to point C, the interface module at point a, the head band at point B, and the band at point C are connected by a first bending portion at the left side of the user's head, which is simplified to point O in fig. 1, which is simplified to point O 'in fig. 2, the portion at the left side of the user's head is simplified to line segment AO (AO '), and the portion at the left side of the user's head is simplified to line segment BO (BO '), and in addition, the interface module at point a, the head band at point B, and the band at point C are also connected by a second bending portion at the right side of the user's head, which are not shown in fig. 1 and 2, for the sake of a simplified view.

As shown in fig. 1, when the size of the user's head is larger, the linear distance between the point a and the point B is larger, and when the position of the point O is located in the position shown in fig. 1 by the telescopic adjustment of the strap, that is, when the line segment AO and the line segment BO form a certain included angle, the interface assembly 20 can be tightly connected to the point a and the headband portion can be tightly connected to the point B. As shown in fig. 2, when the size of the user's head is smaller, the linear distance between the point a and the point B is smaller, and because the sizes of the line segment AO and the line segment BO are fixed, in order to tightly connect the interface component to the point a and the headband portion to the point B, the tightening of the strap is required, so that the first bending portion moves from the point O in fig. 1 toward the back of the user's head to the point O ' in fig. 2, and at this time, the included angle between the selected segment AO and the line segment BO is reduced.

For example, the first and second bends may be located between the crown and the ear. For example, the connection portion extends from the lower end of the nose portion, through the face portion, to between the ear and the crown of the head, and the headband portion extends from the crown of the head in a generally downward direction to between the ear and the crown of the head, and then is connected by the first bending portion and the second bending portion. The position between the head top and the ear is larger in the front-rear direction, after the first bending part and the second bending part are arranged between the head top and the ear, the first bending part and the second bending part can move greatly along the front-rear direction, so that the bending angle range between the head band part and the connecting part is improved, and the range of the head size of a user to which the breathing mask can be adapted is larger.

The utility model provides a respirator, through adjustment band length for bandeau portion and connecting portion can take place relative bending through first kink and second kink, thereby adjust bandeau pipe at the fixed position of user's head and bandeau portion and the contained angle between two parts of connecting portion, satisfy different head size users' wearing travelling comfort and experience sense, guarantee interface assembly and user face contact's leakproofness simultaneously, guarantee respirator's result of use. When the size of the user's head is large, the binding band can be relatively elongated, so that the first bending part and the second bending part are positioned relatively forward on the side surface of the user's head, and the bending angle is large, thereby keeping the interface assembly and the head band tube tightly connected to the user's head. When the size of the user's head is smaller, the binding band can be contracted relatively, so that the first bending part and the second bending part are positioned at the positions of the side surfaces of the user's head, which are relatively back, and the bending angle is smaller, thereby the interface component and the head band tube can be tightly connected to the user's head.

The respiratory mask provided by the present application is described in detail below with reference to specific examples.

Example 1

Fig. 3 is an isometric view of a respiratory mask in accordance with an embodiment one, fig. 4 is a front view of a respiratory mask in accordance with an embodiment one, and fig. 5 is a left side view of a respiratory mask in accordance with an embodiment one. As shown in fig. 3-5, the respiratory mask includes an interface assembly 20, headgear straps, and a harness (not shown). The headband pipe comprises a headband part 11 and a connecting part 12, the headband part 11 is at least partially worn on the top of the head of a user, the connecting part 12 is communicated with the interface assembly 20, the headband part 11 and the connecting part 12 are connected through a first bending part positioned on the left side of the head of the user and a second bending part positioned on the right side of the head of the user, and the bending angles of the first bending part and the second bending part face to the back of the head of the user.

Wherein, first kink and second kink can include the kink pipe, and the one side of kink pipe towards the user is equipped with towards the inside sunken concave structure 13 of kink pipe, and the one side of kink pipe towards the user behind the head does not be equipped with concave structure 13.

The bent tube is bent at the recess 13. Illustratively, the concave structures 13 may be V-shaped with the two sidewalls of the V-shape being relatively close when bent. Of course, the recess structure 13 may be circular arc-shaped, and the shape of the recess structure 13 is not limited in the present application.

The side of the bent tube facing the back of the user is not in contact with the concave structure 13 when bent, so as to prevent the ventilation area in the bent tube from being reduced or even blocked.

One side of the bending tube facing the front of the user can be provided with a plurality of concave structures 13, and the plurality of concave structures 13 can be arranged at intervals along the length direction of the headband tube. The bending tube has different maximum bending angles according to the structure of the concave structure 13, for example, when the concave structure 13 is V-shaped, the maximum bending angle of the bending tube is the included angle of the V-shape. After the bending angle of the bending tube reaches the maximum bending angle, the bending tube cannot continue to bend, for example, after the two side walls of the V-shaped concave structure 13 contact. After the plurality of concave structures 13 are arranged, the bending angle of the bending tube can be the sum of the maximum bending angles of the plurality of concave structures 13, so that the maximum bending angle of the bending tube is increased, and the adjustment of the headband tube is more flexible.

Illustratively, the plurality of concave structures 13 may be closely arranged and corrugated throughout.

The bending modulus of the side of the bending tube facing the front of the user is smaller than the bending modulus of the side of the bending tube facing the back of the user's head. The bending modulus is smaller and easier to bend, and the bending modulus of the bending tube on the side facing the front of the user is smaller, so that the bending tube can be more easily bent. The bending modulus of the bending tube towards the side behind the user is set to be larger, so that the bending tube can be kept in shape, and the air flow channel inside the bending tube is prevented from being blocked due to the fact that the bending tube is bent towards the side behind the user.

Of course, the bending modulus of the front and rear sides of the bent tube may be the same for ease of processing.

The cross-section of the headband tube may be oval, racetrack or D-shaped to increase the comfort of the user's wear. The width of the portion of the headgear tube adjacent the interface assembly 20 may be made smaller to position the headgear tube to block the user's view and enhance the user's wearing experience. The width of the head band tube near the top of the head can be set larger to increase the contact area of the head band tube and the head, thereby improving wearing comfort.

The headband tube may be made of a flexible material, such as silicone, fabric, or the like.

The header pipe communicates with the connecting line, for example, the header part 11 in the header pipe communicates with the connecting line. Wherein the header pipe can be connected with the communication pipeline through the bent pipe 40. The bent pipe 40 and the head pipe may be integrally formed or may be separately formed. When the bent pipe 40 and the head pipe are in a split structure, the bent pipe 40 is connected with the head pipe through the intermediate piece 41.

The material of the intermediate member 41 may be PP, PC, or the like. The mating surface of the elbow 40 and the intermediate piece 41 may be a cylindrical surface (the cylindrical surface may have a certain inclination), or may be a spherical surface, so as to implement the relative rotation of the elbow 40 and the intermediate piece 41. When the matching surface is a spherical surface, the bent pipe 40 is provided with a ball head, and when the matching surface is a spherical surface, the degree of freedom of the bent pipe 40 is larger. The middle piece 41 and the headband tube can be in a detachable structure or can be integrally formed. If the integrated forming mode is adopted, a hole can be formed in the middle piece 41, and the matched bent pipe 40 is also provided with a hole or a groove, and when the middle piece 41 is extruded or twisted, the hole of the middle piece 41 and the hole or the groove of the bent pipe 40 are always overlapped, namely, a gas passage is ensured, and further the treatment effect is ensured.

The material of the elbow 40 may be, but is not limited to, PP, PC, etc. The bent tube 40 is provided with a buckling position for connecting a standard connector of 22 mm. Of course, the connector is not limited to a 22mm connector, and can be a conical connector with smaller diameter, and can be of other customized or irregular shapes on the premise of ensuring the air passage. Vent holes may also be provided in the elbow 40.

The strap is used for being worn behind the user's head, and the first end of strap is connected at first kink, and the second end of strap is connected at the second kink. Specifically, in this embodiment, the first end of the strap is connected to the left side of the user's head and the second end of the strap is connected to the right side of the user's head, such that the strap, headband portion 11, and interface assembly 20 form three points of connection to each other, securing the respiratory mask to the user's head.

The length of the binding belt is adjusted to adjust the bending angles of the first bending part and the second bending part and the front and back positions of the first bending part and the second bending part on the head of the user. Specifically, in this embodiment, the strap may be telescopically adjusted to adjust the bending angle of the bending tube and the bending tube is located at the front and rear positions of the user's head. For example, when the size of the user's head is large, the strap is relatively elongated, causing the bending tube to approach the front of the user and the bending angle to increase; when the size of the user's head is small, the binding band is relatively contracted, so that the bending tube is close to the rear of the user and the bending angle is reduced.

The strap can be an elastic strap, and the strap can automatically stretch and retract according to the size of the head of a user through the elasticity of the strap, so that the bending angles and positions of the first bending part and the second bending part can be automatically adjusted. For example, the belt comprises a rubber material or a fabric material that is highly elastic.

Of course, the belt can also be manually stretched by means of a buckle or a magic tape.

The first bending part and the second bending part are provided with a protruding piece 14 at one side facing the rear of the user, and the binding belt is connected to the protruding piece 14. Illustratively, the side of the bending tube facing the rear of the user is provided with a protruding piece 14, the protruding piece 14 is in a sheet shape, a through hole 15 is formed on the protruding piece, and the binding band is connected with the protruding piece 14 through the through hole 15. The connection between the harness and the headband tube is facilitated by the tab 14.

Wherein the tab 14 and the bent tube may be integrally formed to reduce the number of parts.

The interface assembly 20 is adapted to be worn on the face of a user to communicate with the respiratory airways of the user. The breathing airways refer to the mouth or nose of a user, and the breathing masks may be classified as nasal masks, oral-nasal masks, etc., depending on the communication of the interface assembly 20 with the mouth and nose of the user. The interface assembly 20 is also in communication with the headgear tube.

The interface assembly 20 may include a frame and a cushion. The frame may be a rigid housing that is secured to the user's face (e.g., by straps) that, together with the user's face, encloses a cavity that communicates with the user's respiratory airways. A cushion is positioned between the user's face and the frame to increase the tightness between the frame and the user'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 the user's face. The material of the pad may be silica gel, PP, PC, etc.

Fig. 6 is a schematic diagram of a first safety valve seat 30 in an embodiment of a respiratory mask provided in the present application, and fig. 7 is a schematic diagram of a second safety valve seat 30 in an embodiment of a respiratory mask provided in the present application. As shown in fig. 6 and 7, the interface assembly 20 may further include safety valve seats 30 attached to the frame, and the number of safety valve seats 30 may be 2, 3, 4, etc. The safety valve seat 30 may be connected to the frame by a removable connection (e.g., a snap connection) or by a non-removable connection (e.g., an ultrasonic connection, an adhesive connection, etc.).

The safety valve seat 30 may be made of a rigid material, such as PP, PC, etc. The safety valve seat 30 is internally provided with a valve cavity 33, and the valve cavity 33 is communicated with a cavity surrounded by the frame. The safety valve seat 30 may further be provided with a connection port 34 communicating with the valve chamber 33, the connection port 34 being connected with the connection portion 12 of the head pipe to achieve communication of the head pipe with the frame chamber. The head belt pipe and the safety valve can be detachably connected or non-detachably connected.

The safety valve seat 30 may be provided with a snap connection 31. For example, two safety valve seats 30 are attached to the frame, and the harness further includes third and fourth ends that connect to a snap connection 31 to provide a tighter connection of the interface module 20 to the user's face. The strap and the snap connection portion 31 may be snap connection, so as to implement quick installation or release of the safety valve seat 30 and the strap.

The safety valve seat 30 may further be provided with a mounting hole 32 and a vent hole 35, and a valve plate is installed in the mounting hole 32. When the breathing machine outputs gas, the valve plate covers the vent hole 35; when the respirator is not in operation, the valve plate is moved away from the vent hole 35, and the vent hole 35 is opened, so that the valve cavity 33 is communicated with the external space, and the occurrence of repeated respiration of carbon dioxide is reduced. Illustratively, the valve plate does not cover the vent hole 35 in its natural state, and the valve chamber 33 communicates with the external space. When the ventilator outputs gas, the valve plate is blown to the position of the vent hole 35 by the gas entering the safety valve seat 30, thereby covering the vent hole 35 to isolate the valve cavity 33 from the external space.

The valve plate can be made of flexible materials such as silica gel or rigid materials such as plastic. The connecting position of the valve plate and the safety valve seat 30 forms a rotating shaft, and the valve plate rotates around the rotation during operation, so that the ventilation holes 35 are blocked and released.

The exhaust hole can be arranged on the valve plate, the interface assembly or the bent pipe, and the noise can be reduced and the airflow can be avoided to blow people by adjusting the position of the exhaust hole.

Example two

The main difference between this embodiment and the first embodiment is that the first bending portion and the second bending portion may include the hinge joint 16, and the relative bending of the headband portion 11 and the connecting portion 12 is achieved by the hinge joint 16. Wherein, the inside of the articulated joint 16 is provided with an air flow channel which is communicated with the headband portion 11 and the connecting portion 12.

Fig. 8 is a schematic view of one hinge joint 16 of the respiratory mask of the second embodiment, fig. 9 is a schematic view of one hinge joint 16 of the respiratory mask of the second embodiment, and fig. 10 is a cross-sectional view of one hinge joint 16 of the respiratory mask of the second embodiment.

As shown in fig. 8 to 10, the hinge joint 16 may include a first connection pipe 16a and a second connection pipe 16b, the first connection pipe 16a rotatably sleeved on an outer wall of the second connection pipe 16 b; the first connection pipe 16a communicates with the headband portion 11, and the second connection pipe 16b communicates with the connecting portion 12; alternatively, the first connection pipe 16a communicates with the connection portion 12, and the second connection pipe 16b communicates with the headband portion 11. The first connecting pipe 16a and the second connecting pipe 16b are rotatably sleeved, so that the rotatable angle of the first connecting pipe 16a and the second connecting pipe 16b is larger, and the breathing mask is more flexible to adjust.

Illustratively, the first adapter 16a is integrally formed with the headband portion 11, and the second adapter 16b is integrally formed with the connecting portion 12; alternatively, the second connection pipe 16b is integrally formed with the headband portion 11, and the first connection pipe 16a is integrally formed with the connecting portion 12. This can reduce the number of parts.

Of course, the first connection pipe 16a and the second connection pipe 16b may be separate structures from the headband pipe.

The articulation joint 16 may also be a ball joint, as may a bendable connection of the headband portion 11 and the connection portion 12. Correspondingly, an air flow channel is also arranged in the ball joint, and the air flow channel is communicated with the head belt part 11 and the connecting part 12.

The first and second embodiments may be combined. For example, the first bend comprises a bent tube and the second bend comprises an articulation joint 16; alternatively, the first bend includes an articulation joint 16 and the second bend includes a bent tube.

In addition, in order to allow the breathing mask to be adapted to different head sizes of users, some of the related art breathing masks provide a head harness tube in a telescopic structure. For example, the headband tube in the related art is provided in a bellows structure corresponding to a portion of the headband portion in the present application. When the breathing mask is worn to a user with a large head size, the bellows is lengthened, and when the breathing mask is worn to a user with a small head size, the bellows is shortened, so that the head size of different users can be adapted through the expansion and the contraction of the bellows.

During the expansion and contraction of the bellows, the headband may bend to a small extent due to the softness of the headband itself and the bellows structure. It should be noted that this small range of bending is only intended to accommodate the shape of the user's head during expansion and contraction of the headband tube. In other words, the small-scale bending that occurs with bellows is passive bending during telescoping. The principle of the head tube is that the head tube can be telescopic.

Unlike the related art, in the present application, the relative bending between the headband portion and the connection portion is achieved through the first bending portion and the second bending portion, so that the distance between the point of contact between the headband portion and the user and the distance between the point of contact between the interface component and the user are changed, and the bending between the headband portion and the connection portion is active bending, so that the active adjustment is adapted to the head sizes of different users.

Through setting up buckling pipe, articulated joint etc. in this application, can realize buckling of wide-angle to satisfy different head size user's actual wearing travelling comfort demand, and respiratory mask's leakproofness demand.

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. A respiratory mask is characterized by comprising an interface component, a head belt tube and a strap;

the interface assembly is adapted to be worn on the face of a user to communicate with the respiratory airways of the user;

the head band tube comprises a head band part and a connecting part, wherein the head band part is at least partially worn on the top of the head of a user, the connecting part is communicated with the interface assembly, the head band part is communicated with the connecting part through a first bending part positioned on the left side of the head of the user and a second bending part positioned on the right side of the head of the user, and the bending angles of the first bending part and the second bending part face to the back of the head of the user;

the first end of the strap is connected to the first bending part, and the second end of the strap is connected to the second bending part;

the length of the binding band is adjusted so as to adjust the bending angles of the first bending part and the second bending part and the front and back positions of the heads of the users.

2. The respiratory mask of claim 1 wherein the first and/or second bend comprises a bend tube, a side of the bend tube facing the front of the user is provided with a concave structure concave toward the inside of the bend tube, and a side of the bend tube facing the back of the user is not provided with the concave structure.

3. The respiratory mask of claim 2 wherein a side of the tube that faces the front of the user is provided with a plurality of concave structures, each of the concave structures being spaced apart along the length of the tube.

4. A respiratory mask according to claim 3, wherein the bending modulus of the side of the bending tube facing forward of the user is less than the bending modulus of the side of the bending tube facing rearward of the user's head.

5. The respiratory mask of claim 1 wherein the first bend and/or the second bend comprises an articulating joint.

6. The respiratory mask of claim 5 wherein the hinged joint comprises a first adapter tube and a second adapter tube, the first adapter tube rotatably sleeved on an outer wall of the second adapter tube;

the first connecting pipe is communicated with the head band part, and the second connecting pipe is communicated with the connecting part; alternatively, the first connection pipe communicates with the connection portion, and the second connection pipe communicates with the headband portion.

7. The respiratory mask of claim 1 wherein the strap is an elastic strap.

8. The respiratory mask of claim 1 wherein a side of the first and/or second fold toward the back of the user is provided with a tab to which the strap is attached.

9. The respiratory mask of claim 1 wherein the cross-section of the headgear tube is oval, racetrack or D-shaped.

10. A ventilation device comprising a respiratory mask as claimed in any one of claims 1 to 9.