CN118846344A - Nasal catheter fixing band - Google Patents

Abstract

The invention discloses a nasal catheter fixing band, which relates to the technical field of medical care and is used for fixing a nasal catheter on the head of a user so as to facilitate oxygen therapy to the user. The nasal catheter fixing strap comprises a connecting strap, a first air bag strap, a second air bag strap and a gas conversion structure; the connecting belt is fixedly connected to the nasal catheter; the ends of the first air bag belt and the second air bag belt are fixedly connected with the ends of the connecting belt to form a closed loop structure; the gas conversion structure is communicated with the first air bag belt and the second air bag belt and is used for converting gas inside the first air bag belt and the second air bag belt. According to the invention, the contact positions of the first air bag belt and the second air bag belt with a user are replaced through the driving of the air conversion structure, so that discomfort caused by long-time contact is avoided, the contact area is increased through fixing the air bag, and the comfort level is increased in the use process.

Description

Nasal catheter fixing band

Technical Field

The invention relates to the technical field of medical care, in particular to a nasal catheter fixing band.

Background

The nasal catheter is an introduction structure which is used for providing oxygen for a plurality of reasons such as clinical operation treatment, long-term incapacity of eating and the like; the existing medical nasal catheter is only a smooth hose without a connecting belt, clinically, the phenomenon that the catheter slides in and slides out is prevented for facilitating the movement of patients, and particularly, the nasal catheter is required to be fixed for preventing the patients with disturbance of consciousness and agitation from pulling out the nasal catheter.

In order to solve the problem of fixing the nasal catheter, most medical staff use a binding belt or an adhesive tape to fix the nasal catheter. The binding belt has rough surface and is easy to damage skin; and have elasticity, it is difficult to control suitable elasticity when using, even the bundling strap bindes the elasticity suitable, bindes for a long time and also can cause the face to be uncomfortable, needs incessantly the adjustment position.

Disclosure of Invention

In order to solve the technical problems, the invention provides a nasal catheter fixing strap, which comprises a connecting strap, a first air bag strap, a second air bag strap and a gas conversion structure;

The connecting belt is used for fixedly connecting the nasal catheter;

The end parts of the first air bag belt and the second air bag belt can be fixedly connected with the end parts of the connecting belts to form a closed loop structure; the gas conversion structure is communicated with the first air bag belt and the second air bag belt and is used for converting gas inside the first air bag belt and the second air bag belt.

Preferably: the connecting belt is connected with the first air bag belt and the second air bag belt through a tightness adjusting structure, and the tightness adjusting structure is used for adjusting the circumferences of the connecting belt, the first air bag belt and the second air bag belt to form a closed loop structure.

Preferably: the tightness adjusting structure comprises a fixing piece, a buckle and a corrugated belt, the end part of the connecting belt is fixedly connected with the corrugated belt, the corrugated belt slides through the fixing piece, the fixing piece is fixedly connected with the end parts of the first air bag belt and the second air bag belt, the buckle is arranged in the fixing piece and is used for being fixedly connected with the corrugated belt in a clamping mode.

Preferably: the buckle include button, spring, lever, fixture block, the lever rotates the inside that sets up the stationary blade, the one end fixedly connected with fixture block of lever, the other end of lever is connected with the button, the non-link of button stretches out the stationary blade, the spring is connected with the lever and makes the fixture block card accomplish the fixed of ripple area in the inside of ripple area.

Preferably: the gas conversion structure comprises a first inflation bag, a second inflation bag and a gas exchange tube, wherein the first inflation bag and the second inflation bag are communicated through the gas exchange tube, the first inflation bag and the second inflation bag are respectively communicated with a first air bag belt and a second air bag belt through connecting pipes, a control valve is arranged in the gas exchange tube and used for limiting gas with a difference lower than a preset pressure to pass through and allowing gas with a difference higher than or equal to the preset pressure to pass through.

Preferably: the first inflation bag and the second inflation bag are fixedly connected through a connecting pad, and the ventilation pipe is buried in the connecting pad.

Preferably: the control valve comprises a mounting tube, mounting rings, limiting pieces and ring plugs, wherein the control valve is communicated with the ventilation tube, a ring of mounting rings are fixedly arranged on the inner wall of the mounting tube, two limiting pieces are fixedly arranged in the mounting tube, the limiting pieces are positioned on two sides of the mounting rings, and the ring plugs are slidably arranged in the mounting rings.

Preferably: the ring plug is connected with the limiting piece through the elastic piece.

Preferably: a guide rod is fixedly connected between the two limiting pieces and penetrates through the ring plug in a sliding mode.

Preferably: the control valve is detachably connected with the ventilation pipe.

Preferably: the first air bag belt and the second air bag belt are communicated with a chin belt, and the chin belt is tied at the chin position of a user; the telescopic adjusting piece is arranged between the first air bag belt, the second air bag belt and the chin belt and used for accommodating the first air bag belt, the second air bag belt and the chin belt and buffering in the using process.

Preferably: the telescopic adjusting piece comprises a folding buffer structure, a rotating rod and a storage roll, the rotating rod is rotatably arranged in a cavity formed in the fixing piece, the storage rolls are arranged in two and are coaxially and fixedly connected to the rotating rod, and the first air bag belt, the chin belt, the second air bag belt and the chin belt are respectively rolled on the two storage rolls and extend out from the opposite directions of the fixing piece; the folding and unfolding buffering structure is at least provided with one or two, of course, can be connected to the end part of the rotating rod and is used for folding and unfolding and fixing the first air bag belt, the second air bag belt and the chin belt and for carrying out elastic buffering on the fixed first air bag belt, the fixed second air bag belt and the fixed chin belt.

Preferably: the retractable buffer structure comprises a pressing head, a nested rod, a first spring, a limit ring and a second spring, wherein one end of the pressing head is slidably embedded into the fixing sheet, the nested rod is arranged in the fixing sheet, one end of the nested rod rotates and can be slidably embedded into the embedded end of the pressing head, the end part of the rotating rod rotates to be provided with the limit ring, the other end of the nested rod rotates and can be slidably penetrated through the limit ring and is embedded into the rotating rod, the first spring is nested on the nested rod, the two ends of the first spring are fixedly connected with the pressing head and the limit ring respectively, the second spring is nested on the rotating rod, the two ends of the second spring are fixedly connected with the limit ring and the rotating rod respectively, and the two ends of the nested rod are provided with limit structures with the pressing head and the limit ring respectively, so that the nested rod is prevented from sliding out of the pressing head and the limit ring; the inner circumference of the pressing head is fixedly provided with a plurality of first cards, the first cards are positioned on the inner wall of the embedded end of the pressing head, the corresponding end part of the nesting rod is fixedly provided with at least one first guide piece, the pressing head is far away from the rotating rod and slides towards the extending fixing piece under the action of the first spring, the first guide piece is meshed with the first cards, and the pressing head and the nesting rod are coaxially fixed relatively. The inner wall circumference of spacing collar is fixed and is provided with a plurality of second cards, the inner wall circumference of dwang is fixed and is provided with a plurality of third cards, the fixed at least second guide piece that is provided with in corresponding position of nested pole, the dwang is kept away from to nested pole under the effect of first spring, second guide piece and second card meshing, the spacing collar can not rotate relative nested pole, and the dwang can rotate relative nested pole this moment, when the pressure is received to the pressing head, second guide piece and second card, third card mesh simultaneously, the spacing collar, the dwang can not rotate relative nested pole.

The invention has the technical effects and advantages that: through the gas conversion structure drive, the inside gas of first gasbag area enters into the inside of second gasbag area, and first gasbag area is flat and the second gasbag area of this moment is swelled, and first gasbag area is flat back and the user's breaking away from, and second gasbag area is swelled and thickness increases, and the inboard of second gasbag area is contacted with the user to can change user's contact position. In the process of using the bandage, most of the positions of the bandage are contacted with the face and the head, the first air bag belt and the second air bag belt are contacted with the face for a long time to cause discomfort, and the contact positions are changed, so that the discomfort caused by long-time contact is avoided, the contact area is increased by fixing the bandage in an air bag mode, and the comfort level is increased in the use process.

Drawings

Fig. 1 is a schematic view illustrating the use of an embodiment 1 of a nasal catheter fixing strip according to the present invention.

Fig. 2 is a schematic structural view of a driving structure in a nasal catheter fixing band according to the present invention.

Fig. 3 is a schematic structural view of a control valve in a nasal catheter fixing band according to the present invention.

Fig. 4 is a schematic structural view of a driving structure in a nasal catheter fixing band according to the present invention.

Fig. 5 is a schematic view of a nasal catheter fixing strip according to embodiment 2 of the present invention.

Fig. 6 is a schematic view of the internal structure of the telescopic adjuster in the nasal catheter fixing band according to the present invention.

Fig. 7 is a schematic internal perspective view of a telescopic adjuster in a nasal catheter fixing band according to the present invention.

Fig. 8 is an enlarged schematic view of the structure of fig. 6 a.

Fig. 9 is an enlarged schematic view of the structure B in fig. 6.

Reference numerals illustrate: the nasal catheter 1, the connecting band 2, the first balloon band 3, the second balloon band 4, the gas converting structure 5, the corrugated band 6, the fixing piece 7, the buckle 8, the first balloon 9, the connecting tube 10, the second balloon 11, the ventilation tube 12, the control valve 13, the mounting tube 14, the mounting ring 15, the limiting piece 16, the ring plug 17, the chin strap 18, the telescopic adjusting piece 19, the pressing head 20, the nesting rod 21, the first spring 22, the limiting ring 23, the second spring 24, the rotating rod 25, the storage roll 26, the first card 27, the first guide piece 28, the second guide piece 29, the second card 30 and the third card 31.

Detailed Description

The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Example 1

Referring to fig. 1, in this embodiment, a nasal catheter fixing band is provided for fixing a nasal catheter 1 on a head of a user, so as to facilitate oxygen therapy for the user, the nasal catheter fixing band may include a connecting band 2, a first air skirt band 3, a second air bag band 4 and a gas conversion structure 5, and the connecting band 2 may be fixedly connected to the nasal catheter 1, which is not, of course, excluded from being used for fixing a mask or the like, and details thereof will not be repeated herein. The nasal cannula 1 is in communication with an oxygen supply device, which supplies oxygen into the nasal cannula 1, which is known in the art and will not be described in detail herein. The connection belt 2 and the nasal catheter 1 may also be detachably connected, such as a clamping connection, etc., which is specifically in the prior art, and will not be described herein. The connecting band 2 can be of a strip-shaped structure, the middle part of the connecting band 2 can be connected to the nasal catheter 1, and the nasal catheter 1 can be attached to the upper lip of a user, so that oxygen in the nasal catheter 1 can enter the nose of the user conveniently. In order to increase the comfort of use, the corresponding positions of the first airbag belt 3 and the second airbag belt 4 may also be arranged in a sheet shape or in a plurality of alternate compositions to increase the contact area. When the gas inside the first air bag belt 3 or the second air bag belt 4 is insufficient, the first air bag belt 3 or the second air bag belt 4 is not supported by gas, the air bag belt is in a shrunken shape, the volume is increased after the air bag belt is filled with the gas, the thickness of the section is increased simultaneously, and the prior art is not repeated here. The ends of the first and second balloon bands 3 and 4 are fixedly connected to the ends of the connecting band 2 so that a closed loop structure can be formed to be easily wrapped around the head of the user, thereby completing the fixation of the nasal catheter 1. The first and second air bag belts 3,4 are fixed with the connecting belt 2 in a dislocation manner so as to have different connecting points, thereby having different contact positions between the first and second air bag belts 3,4 and the user. The gas conversion structure 5 is communicated with the first airbag belt 3 and the second airbag belt 4, the gas conversion structure 5 is used for converting the gas in the first airbag belt 3 and the second airbag belt 4, the gas in the first airbag belt 3 enters the second airbag belt 4 through the driving of the gas conversion structure 5, the first airbag belt 3 is shrunken and the second airbag belt 4 is expanded, the first airbag belt 3 is separated from a user after being shrunken, the second airbag belt 4 is expanded and the thickness is increased, the inner side of the second airbag belt 4 is contacted with the user, and therefore the contact position of the user can be changed. In the process of using the binding belt, most of the binding belt is in contact with the face and the head, the first air bag belt 3 and the second air bag belt 4 are in contact with the face for a long time to cause discomfort, and the contact position is changed, so that the discomfort caused by long-time contact is avoided, the contact area is increased by fixing the binding belt in an air bag mode, and the comfort level is increased in the use process. The first air bag belt 3 and the second air bag belt 4 can be fixedly connected through the connecting sheets, so that the first air bag belt 3 or the second air bag belt 4 in a bulged state supports the first air bag belt 3 and the second air bag belt 4 which are shrunken, and the scattering is avoided, so that the attractiveness is improved.

The connecting band 2 and the first airbag band 3, the second airbag band 4 can be connected through the elasticity adjustment structure, can adjust the circumference that connecting band 2, first airbag band 3, second airbag band 4 formed the closed loop structure through the elasticity adjustment structure to can be applicable to the user of various size head girth, the elasticity adjustment structure can include stationary blade 7, buckle 8 and ripple area 6, the tip fixedly connected with ripple area 6 of connecting band 2, the ripple area 6 slides and passes stationary blade 7, stationary blade 7 fixed connection is at the tip of first airbag band 3 and second airbag band 4, the inside of stationary blade 7 is provided with buckle 8, buckle 8 is used for fixing with ripple area 6 joint. The buckle 8 can comprise a button, a spring, a lever and a clamping block (the structural drawing is not shown), the lever rotates to set the inside of the fixing piece 7, one end of the lever is fixedly connected with the clamping block, the other end of the lever is connected with the button, the non-connecting end of the button extends out of the fixing piece 7, the spring is connected with the lever and enables the clamping block to clamp the inside of the corrugated belt 6 to fix the corrugated belt 6, and pressing the button can enable the lever to rotate, so that the clamping block is separated from the corrugated belt 6, and tightness adjustment can be completed. Of course, the tightness adjusting structure may be other structures, for example, fastened by a buckle, a deformation force, etc., which will not be described herein.

Referring to fig. 2, the gas conversion structure 5 may include a first balloon 9, a second balloon 11, and a ventilation tube 12, the first balloon 9 and the second balloon 11 being communicated through the ventilation tube 12, the first balloon 9 and the second balloon 11 being respectively communicated with the first balloon belt 3 and the second balloon belt 4 through connection tubes 10, the inside of the ventilation tube 12 being provided with a control valve 13, the control valve 13 being for restricting the passage of a gas having a difference lower than a preset pressure and allowing the passage of a gas having a difference higher than or equal to the preset pressure. Referring to fig. 4, the first and second cuffs 9 and 11 are on both sides of the head when the nasal catheter fixing band is in use. When the user needs to change the fixing positions of the first air bag belt 3 and the second air bag belt 4, the user rotates the head, the head presses the second inflation bag 11, the pressure difference between the second inflation bag 11 and the first fixing bag 9 is larger than the preset pressure, the gas in the second inflation bag 11 enters the first inflation bag 9 and the first air bag belt 3, the head returns to the initial position, and then the first air bag belt 3 is inflated and the second air bag belt 4 is deflated. The user reversely rotates the head, the head extrudes the first inflation bladder 9, the pressure difference between the first inflation bladder 9 and the second inflation bladder 11 is larger than the preset pressure, the gas in the first inflation bladder 9 enters the second inflation bladder 11 and the second air bladder belt 4, the head returns to the initial position, the second air bladder belt 4 bulges, and the first air bladder belt 3 is shrunken, so that the fixed position is switched. Such operation requires setting an appropriate pressure difference of the control valve 13, which is not described in detail herein. Of course, the gas conversion structure 5 can be completed by combining the air pump and the exhaust valve, and of course, the gas conversion structure can also be driven by a manual unidirectional balloon to be matched with the exhaust valve, and the specific structure is not described herein. The first and second inflatable bladders 9, 11 may be buried in a cushion like pillow to facilitate and increase comfort for the user. Of course, the first inflation bladder 9 and the second inflation bladder 11 can be fixedly connected through the connecting pad, the ventilation pipe 12 can be buried in the connecting pad, the connecting pad is matched with the first inflation bladder 9 and the second inflation bladder 11 to form the radian of the head of a user, so that the comfort level of the user is improved, and the human body structure is met. The first and second inflation bags 9 and 11 can be provided with air inlet nozzles and exhaust valves respectively, and the air inlet nozzles are internally provided with one-way air valves, so that air can be blown into the first inflation bag 9 or the second inflation bag 11 through the air inlet nozzles. When the redundant gas is required to be discharged or the conduit connecting belt is required to be retracted, the exhaust valve is opened to discharge the gas in the conduit connecting belt, and the exhaust valve can be a quantitative exhaust valve.

Referring to fig. 3, the control valve 13 may include a mounting tube 14, a mounting ring 15, a limiting member 16 and a ring plug 17, where the control valve 13 is in communication with the ventilation tube 12, and the control valve 13 may be detachably connected to the ventilation tube 12, and the detachment may be a threaded connection, a nested fixed connection, etc., which are not described herein in detail. The inner wall of the installation tube 14 is fixedly provided with a circle of installation ring 15, the section of the installation ring 15 can be of a trapezoid structure to form a cross-section shrinkage structure of the installation tube 14, two limiting pieces 16 are fixedly arranged in the installation tube 14, the limiting pieces 16 are positioned on two sides of the installation ring 15, a ring plug 17 is slidably arranged in the installation ring 15, the ring plug 17 can be connected with the limiting pieces 16 through elastic pieces, the ring plug 17 is positioned in the installation ring 15 to form a closed structure, when the pressure difference on two sides of the control valve 13 is increased to a preset pressure difference, the elastic pieces stretch to enable the ring plug 17 to slide out of the installation ring 15 when the pressure difference is increased, and therefore gas circulation of the first bulge cell 9 and the second bulge cell 11 is facilitated. When the pressure difference is smaller than this preset pressure difference, the grommet stopper 17 reenters the inside of the mounting grommet 15 to complete the closure. The elastic member may be a spring, an elastic rope, etc., and is not described in detail herein. The elastic member is exemplified by springs, and the difference f=2kx between the preset pressures is the same, where x is the length of the ring plug 17, and the ring plug 17 is located in the middle of the mounting ring 15 and is communicated with the narrowest channel of the mounting ring 15, which is only an applicable condition and is not limited. A guide rod is fixedly connected between the two limiting pieces 16, and the guide rod slides through the ring plug 17, so that the position of the ring plug 17 is conveniently limited. Of course, the limiting piece 16 and the ring plug 17 may also be magnets, and both limiting pieces 16 have the same poles as the corresponding ring plug 17, and limit the ring plug 17 through the repulsive force of the magnets, which is not described in detail herein. Of course, the control valve 13 may have other structures, which will not be described in detail herein. Of course, when the structure is operated, the pressure difference is enough, and the restraint piece 16 is matched with the ring plug 17, so that the discomfort caused by large binding force due to overlarge pressure of the first air bag belt 3 or the second air bag belt 4 (playing a role in fixation) in the use process can be avoided. Specifically, when the pressure difference is too large under the condition that the first and second inflation bags 9 and 11 have no pressure, the ring plug 17 can reversely move under the action of the pressure difference to uniformly distribute the pressure.

Example 2

Referring to fig. 5, the first airbag belt 3 and the second airbag belt 4 are both connected with a chin belt 18, and the chin belt 18 and the first airbag belt 3 and the second airbag belt 4 are made of the same material, specifically in the prior art, and are not described in detail herein. The chin strap 18 can be tied at the chin position of a user, so that the nasal catheter 1 is fixed and stable, the first air bag strap 3 and the second air bag strap 4 are communicated with the chin strap 18, and the chin strap 18 at the moment is two and is respectively communicated with the first air bag strap 3 and the second air bag strap 4. The gas in the first and second balloon bands 3, 4 may enter the interior of the chin strap 18, and will not be described in detail herein. The telescopic adjusting piece 19 is arranged between the first air bag belt 3, the second air bag belt 4 and the chin belt 18, the telescopic adjusting piece 19 is used for accommodating the first air bag belt 3, the second air bag belt 4 and the chin belt 18 and buffering in the using process, and the telescopic adjusting piece 19 can be installed inside the fixing piece 7.

Referring to fig. 6 to fig. 7, the specific structure may be that the expansion adjusting member 19 includes a retraction buffer structure, a rotating rod 25 and a storage roll 26, the rotating rod 25 is rotatably disposed in a cavity formed in the fixing piece 7, the storage roll 26 may be disposed in two and coaxially and fixedly connected to the rotating rod 25, and the first air bag strap 3, the chin strap 18, the second air bag strap 4 and the chin strap 18 are respectively rolled up on the two storage rolls 26 and extend from opposite directions of the fixing piece 7, which is not described herein in detail. The retraction buffer structure is provided with at least one, but of course, two may be provided, and two are taken as an example here, connected to the end of the rotation rod 25, for retracting and fixing the first and second air bag straps 3 and 4 and the chin strap 18, and for performing elastic buffer on the fixed first and second air bag straps 3 and 4 and the chin strap 18. The buffer structure of receiving and releasing can include the press head 20, the loop bar 21, first spring 22, spacing collar 23 and second spring 24, the inside of stationary blade 7 is embedded to the gliding one end of press head 20, press head 20 this moment can be the polygon prism structure and cooperate the nestification, loop bar 21 sets up in the inside of stationary blade 7, the one end of loop bar 21 rotates and slidable embeds the embedded end of press head 20, the tip rotation of loop bar 25 is provided with spacing collar 23, the other end of loop bar 21 rotates and slidable passes spacing collar 23 and embeds the inside of loop bar 25, first spring 22 nestification is on loop bar 21 and both ends are fixed connection respectively on press head 20 and spacing collar 23, the nestification has second spring 24 on the loop bar 25, and the both ends of second spring 24 are fixed connection spacing collar 23 and dwang 25 respectively, the both ends of loop bar 21 are provided with limit structure with press head 20, spacing collar 23 respectively, avoid loop bar 21 to slide out press head 20, spacing collar 23, limit structure can be the protruding structure of each other, specifically do not doing this in the prior art.

Referring to fig. 8, a plurality of first cards 27 are fixedly arranged in the inner circumference of the pressing head 20, the first cards 27 are positioned on the inner wall of the embedded end of the pressing head 20, at least one first guide piece 28 is fixed at the corresponding end of the embedded rod 21, the pressing head 20 is far away from the rotating rod 25 and slides towards the extending fixing piece 7 under the action of the first spring 22, the first guide piece 28 is meshed with the first cards 27, and the pressing head 20 and the embedded rod 21 are coaxially fixed relatively. Referring to fig. 9, a plurality of second cards 30 are fixedly disposed on the inner wall of the limit ring 23 in the circumferential direction, a plurality of third cards 31 are fixedly disposed on the inner wall of the rotating rod 25 in the circumferential direction, at least one second guide piece 29 is fixedly disposed at a corresponding position of the sleeve rod 21, the sleeve rod 21 is far away from the rotating rod 25 under the action of the first spring 22 (the sleeve rod 21 has the stretching and torsion effects at the same time, the sleeve rod 21 is far away under the action of the limiting structure), the second guide piece 29 is meshed with the second cards 30, the limit ring 23 cannot rotate relative to the sleeve rod 21, and at the moment, the rotating rod 25 can rotate relative to the sleeve rod 21, and when the pressing head 20 is pressed, the second guide piece 29 can be meshed with the second cards 30 and the third cards 31 at the same time, and the limit ring 23 and the rotating rod 25 cannot rotate relative to the sleeve rod 21. When the device is used, the pressing head 20 is pressed, the pressing head 20 is close to the rotating rod 25 under the action of pressure, at the moment, the first guide piece 28 is separated from the first card 27, the second guide piece 29 is simultaneously meshed with the second card 30 and the third card 31, at the moment, the rotating rod 25, the storage roll 26 and the nesting rod 21 can be regarded as an integral structure, the inside of the integral structure can not rotate relatively, under the action of the nesting rod 21, the integral structure can rotate, the first air bag belt 3, the second air bag belt 4 and the chin belt 18 can be wound, the first air bag belt 3, the second air bag belt 4 and the chin belt 18 are pulled to release, when the lengths of the first air bag belt 3, the second air bag belt 4 and the chin belt 18 are adjusted, the pressing head 20 is loosened, the pressing head 20 is far away from the rotating rod 25 under the action of the first spring 22, at the moment, the second guide piece 29 is separated from the third card 31 and meshed with the second card 30, the limit ring 23 can not rotate relatively to the pressing head 20, namely the first spring 22 is separated from the third card 31, the second spring 24 can not rotate relatively, and the torsion force can be reduced to the second air bag belt 25 under the action of the second spring 24, and the torsion can be reduced to the torsion of the torsion can not be reduced to the torsion, or reduced to the torsion of the first air bag belt 25. The structure is limited, the first air bag belt 3, the second air bag belt 4 and the chin belt 18 are in a closed loop structure which is communicated, one telescopic adjusting piece 19 is arranged, and the air circulation is not limited by the telescopic adjusting piece 19.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims (10)

1. The nasal catheter fixing band is characterized by comprising a connecting band, a first air bag band, a second air bag band and a gas conversion structure;

The connecting belt is used for fixedly connecting the nasal catheter;

The first air bag belt and the second air bag belt are fixedly connected with the connecting belt to form a closed loop structure; the gas conversion structure is communicated with the first air bag belt and the second air bag belt and is used for converting the gas inside the first air bag belt and the second air bag belt to change the contact position with a user.

2. The nasal catheter fixation strap of claim 1, wherein the connection strap is connected to the first and second balloon straps by a slack adjustment mechanism for adjusting the circumference of the connection strap and the first and second balloon straps to form a closed loop.

3. The nasal catheter fixation strap of claim 2, wherein the tightness adjustment structure comprises a fixation plate, a buckle and a corrugated strap, the end of the connection strap is fixedly connected with the corrugated strap, the corrugated strap slides through the fixation plate, the fixation plate is connected to the first and second balloon straps, the buckle is arranged inside the fixation plate, and the buckle is used for being clamped and fixed with the corrugated strap.

4. A nasal catheter fixation strap according to claim 1 wherein the gas switching structure comprises a first inflatable bladder, a second inflatable bladder and a ventilation tube, the first inflatable bladder and the second inflatable bladder being in communication via the ventilation tube, the first inflatable bladder and the second inflatable bladder being in communication with the first bladder strap and the second bladder strap, respectively, via a connecting tube, the interior of the ventilation tube being provided with a control valve for restricting the passage of gas below a predetermined pressure difference and allowing the passage of gas above or equal to the predetermined pressure difference.

5. The nasal catheter fixation strap of claim 4, wherein the first and second cuffs are fixedly connected by a connection pad, and wherein the ventilation tube is embedded within the connection pad.

6. The nasal catheter fixation strap of claim 4, wherein the control valve comprises a mounting tube, a mounting ring, limiting pieces and a ring plug, the control valve is used for being communicated with the ventilation tube, a ring of mounting ring is fixedly arranged on the inner wall of the mounting tube, two limiting pieces are fixedly arranged in the mounting tube, the limiting pieces are positioned on two sides of the mounting ring, and the ring plug is slidably arranged in the mounting ring.

7. The nasal catheter fixation strap of claim 1, wherein the first and second balloon straps each communicate with a chin strap.

8. The nasal catheter fixation strap of claim 7, wherein a telescoping adjustment member is disposed between the first and second balloon straps and the chin strap, the telescoping adjustment member being configured to receive and cushion the first and second balloon straps and the chin strap during use.

9. The nasal catheter fixation strap of claim 7, wherein the telescoping adjustment comprises a retraction buffer structure, a rotating rod and a receiving roll, the rotating rod is rotatably disposed in a cavity formed in the fixing piece, the receiving roll is provided with two receiving rolls and is coaxially and fixedly connected to the rotating rod, and the first air bag strap, the chin strap, the second air bag strap and the chin strap are respectively rolled on the two receiving rolls and extend from opposite directions of the fixing piece; the folding buffer structure is at least provided with one and is connected to the end part of the rotating rod, and is used for folding, unfolding and fixing the first air bag belt, the second air bag belt and the chin belt and for carrying out elastic buffer on the fixed first air bag belt, the fixed second air bag belt and the fixed chin belt.

10. The nasal catheter fixation strap of claim 5, wherein the control valve is removably coupled to the ventilation tube.