CN219700747U

CN219700747U - Nasal oxygen mask for assisting oxygenation

Info

Publication number: CN219700747U
Application number: CN202320579189.9U
Authority: CN
Inventors: 嵇君伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-09-19
Anticipated expiration: 2033-03-22

Abstract

The utility model relates to the technical field of clinical medical equipment, in particular to a nose oxygen mask for assisting in oxygenation. The utility model relates to a nasal oxygen mask for assisting oxygenation, which is used for clamping and fixing a nasal oxygen tube, and comprises the following components: the nose pad is used for being attached to the air outlet of the nostril, and a first clamping groove is formed in the upper side of the nose pad; the outer nose cover body is provided with an oxygenation groove capable of accommodating the outer nose, the outer nose cover body is connected with the upper end of the nose attaching seat in a clamping mode, the outer nose cover body is provided with a second clamping groove, and the second clamping groove is matched with the first clamping groove to clamp and fix the nasal oxygen tube. The nasal oxygen mask for assisting in oxygen increasing can clamp and fix the nasal oxygen tube without adopting a butt joint mode, so that the problem that oxygen cannot be supplied due to falling of the nasal oxygen tube is avoided, the discomfort caused by the fact that the mouth of the nasal oxygen tube stimulates the nostril or the interior of the nasal cavity is reduced, the contact loss of oxygen and outside air can be effectively prevented by the outer nasal mask body, a local oxygen increasing environment can be formed outside the nostril of a patient, and the comfort of breathing and oxygen supplying is better.

Description

Nasal oxygen mask for assisting oxygenation

Technical Field

The utility model relates to the technical field of clinical medical equipment, in particular to a nose oxygen mask for assisting in oxygenation.

Background

The main function of clinical oxygen therapy is to increase the arterial oxygen partial pressure, improve the oxygen supply of human body, and relieve the respiratory and circulatory burden increased by compensating for hypoxia, and the final aim is to improve the hypoxia state of the organism.

At present, common clinical oxygen therapy modes mainly comprise nasal catheter oxygen therapy, mask atomization oxygen supply, oxygen hood and oxygen tent; the nasal catheter is an economical and effective common oxygen supply mode, the orifice or the nasal inlet pipe of the nasal catheter is generally placed into the inner side of a nostril, and local high-oxygen environment oxygen supply is formed under the cooperation of the inner structure of the nostril; however, since the orifice of the nasal catheter or the nasal inlet tube extends into the nostril, the nasal cavity is stimulated to generate mucus or nasal discharge, and the nostril is easily blocked; secondly, for patients with allergic rhinitis, the symptoms of the patients with allergic rhinitis are aggravated by the stimulation of the orifice or the nasal feeding tube, and especially the stimulation can cause the patients to sneeze to cause discomfort, and nasal catheters are easy to fall off to cause the patients to fail to normally deliver oxygen.

In the prior art, as CN202121330979.0 and CN202121273310.2 respectively disclose mask type and nasal mask type oxygen supply structures, although the mask type oxygen supply structures can cover the nose to form an oxygen increasing environment, the mask type oxygen supply structures also need to cover the mouth, so that the tension emotion of a patient can be aggravated, and the intra-operative hypoxia is easy to generate; although the nose cover is only used for covering the outer nose of a patient, a single/double pair of interfaces for conveying oxygen are arranged on the nose cover and are in butt joint with the oxygen conveying pipe, so that oxygen conveying is carried out, the risk that the oxygen conveying is impossible due to the falling of the butt joint exists, and the oxygen conveying device is not suitable for oxygenation of the conventional ear-hanging type nose oxygen pipe.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a nose oxygen mask for assisting in oxygenation. The auxiliary oxygen-increasing nasal oxygen mask provided by the utility model can fix a conventional nasal oxygen tube, does not need to adopt a butt joint mode for oxygen therapy, has a good oxygen-increasing environment effect at the nostril opening, can be suitable for patients with allergic rhinitis, and reduces discomfort caused by nasal catheter nasal irritation.

The technical scheme for solving the technical problems is as follows:

the utility model aims to provide a nose oxygen mask for assisting oxygenation.

According to the utility model, the nasal oxygen mask for assisting oxygenation is used for clamping and fixing a nasal oxygen tube, and comprises:

the nose pad is used for being attached to the air outlet of the nostril, and a first clamping groove is formed in the upper side of the nose pad;

the outer nose cover body is provided with an oxygenation groove capable of accommodating an outer nose, the outer nose cover body is connected with the upper end of the nose pad in a clamping mode, a second clamping groove is formed in the outer nose cover body, and the second clamping groove is matched with the first clamping groove to clamp and fix the nose oxygen tube.

According to the nasal oxygen mask for assisting in oxygenation provided by the specific embodiment of the utility model, the nasal tip limiting piece is arranged in the oxygenation groove, and one end of the nasal tip limiting piece is fixedly connected with the inner side wall of the oxygenation groove.

According to the nasal oxygen mask for assisting in oxygenation provided by the specific embodiment of the utility model, the nasal bridge support piece is arranged in the oxygenation groove, and one end of the nasal bridge support piece is fixedly connected with the inner side wall of the oxygenation groove.

According to the nasal oxygen mask for assisting in oxygenation provided by the specific embodiment of the utility model, the opposite sides of the outer nasal mask body are respectively provided with a fixing belt, and one end of each fixing belt is fixedly connected with the outer nasal mask body.

According to the nasal oxygen mask for assisting in oxygen increasing provided by the specific embodiment of the utility model, each fixing strap is provided with a buckling strap and a magic sub-patch, one end of the buckling strap is fixedly connected with the fixing strap, and the other end of the buckling strap is provided with a magic mother patch matched with the magic sub-patch.

According to the nasal oxygen mask for assisting oxygenation provided by the specific embodiment of the utility model, the nasal mask comprises:

nose pads;

the baffle is connected with the nose patch at one side;

the side pieces are arranged at two ends of the baffle piece, and each side piece is provided with a first clamping groove.

According to the nasal oxygen mask for assisting in oxygenation, which is provided by the specific embodiment of the utility model, the first clamping groove and the second clamping groove are semicircular.

According to the nasal oxygen mask for assisting in oxygenation, which is provided by the specific embodiment of the utility model, the nose patch is arc-shaped.

According to the nasal oxygen mask for assisting in oxygenation, provided by the specific embodiment of the utility model, the side pieces are connected with the outer nasal mask body through the clamping assembly.

According to the nasal oxygen mask for assisting oxygenation provided by the specific embodiment of the utility model, the clamping assembly comprises:

one end of the fixing piece is fixedly connected with the side piece, and the other end of the fixing piece is provided with a clamping protrusion;

the clamping part is arranged on the inner side of the outer nose cover body, and a clamping groove matched with the clamping protrusion is formed in the clamping part.

Explanation of the related terms of the present utility model:

oxygenation: in the case of the nasal-entering nasal catheter, the orifice of the nasal catheter is arranged at the inner side of the nostril, so that the orifice and the inner side wall of the nostril are limited by the blocking effect, and local oxygenation is formed in the nasal cavity; in the utility model, the orifice of the nasal catheter cannot be placed in the nostril, and under the condition that the nasal catheter can be continuously used, the orifice of the nasal catheter is placed at the outer side opposite to the nostril, and the concentration of oxygen discharged by the orifice is easy to be reduced due to the fact that the oxygen is easily contacted with external air, so that the outer nasal mask body is required to be arranged, the difficulty of contact between the oxygen and the external air is increased, and the gas oxygen therapy with higher oxygen content is ensured to be formed at the outer side of the nostril, and therefore, the outer nasal mask body is not required to be completely sealed for the outer nose of a patient.

Compared with the prior art, the utility model has the beneficial effects that:

1. the nasal oxygen mask for assisting in oxygen increasing can clamp and fix the nasal oxygen tube without adopting a butt joint mode, so that the problem that oxygen cannot be supplied due to falling of the nasal oxygen tube is avoided.

2. The nasal oxygen mask for assisting in oxygenation can place the orifice of the nasal oxygen tube outside the nostril of a patient, can reduce the stimulation of the orifice of the nasal oxygen tube to the nostril or the inside of the nasal cavity, and brings uncomfortable feeling to the patient; the outer nose cover body can effectively prevent the contact loss of oxygen and outside air, so that a local oxygenation environment can be formed outside the nostrils of a patient, and the comfort of breathing and oxygen therapy is better.

3. According to the nasal oxygen mask for assisting in oxygenation, the nasal tip limiting piece and the nose bridge supporting piece are arranged in the oxygenation groove of the outer nasal mask body, so that on one hand, the outer nasal mask body can be limited, and on the other hand, the nasal tip limiting piece is increased to be contacted with the outer nose, so that the pressing effect of the outer nasal mask body on the face of a patient is reduced; the nose bridge support piece enables the surface of the oxygenation groove to be spaced from the outer nose, and particularly enables the top edge of the outer nose cover body to be spaced from the outer nose, so that oxygenation and respiration are facilitated.

4. The nose oxygen mask for assisting oxygen increasing is provided with the buckling belts on the fixing belts, so that the nose oxygen tube can be fixed and restrained, particularly the ear-hanging nose oxygen tube is often extended to the oxygen supply system after bypassing ears, the nose oxygen tube is easy to be unhooked, the nose oxygen tube can be fixed, tidied and restrained by adopting the buckling belts, and particularly, the effect of fixing the nose oxygen tube by arranging two buckling belts on each fixing belt is optimal.

5. The auxiliary oxygenation nose oxygen mask has the advantages that the clamping mode of the nose attaching seat and the outer nose mask body is simple, and the auxiliary oxygenation nose oxygen mask can be quickly installed and used.

Drawings

FIG. 1 is a cross-sectional view of a nasal oxygen mask for assisting in oxygenation according to an embodiment of the utility model;

fig. 2 is a schematic view of a three-dimensional structure of a nose pad according to an embodiment of the present utility model;

FIG. 3 is a front view of the structure of a nasal oxygen mask for assisting in oxygenation according to an embodiment of the utility model;

fig. 4 is a schematic structural diagram of a clamping assembly according to an embodiment of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. a nose pad; 11. nose pads; 12. a baffle; 13. a side panel; 14. a first clamping groove; 15. a clamping assembly; 151. a fixing piece; 152. a clamping part; 153. a clamping protrusion; 154. a clamping groove; 2. an outer nasal mask body; 21. an oxygenation tank; 22. nose tip limiting sheets; 23. a nose bridge support; 24. a second clamping groove; 3. a nasal oxygen cannula; 4. a fixing belt; 5. a buckle belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, based on the examples herein, which are within the scope of the utility model as defined by the claims, will be within the scope of the utility model as defined by the claims.

Examples

Based on fig. 1-4, this embodiment provides a nose oxygen mask of supplementary oxygenation, and the nose oxygen mask is used for centre gripping fixed nose oxygen pipe 3, and the nose oxygen mask includes:

a nose pad 1 for attaching to the nostril air outlet, a first clamping groove 14 is arranged on the upper side of the nose pad 1;

the outer nose cover body 2, the outer nose cover body 2 has the oxygenation groove 21 that can hold outer nose, and outer nose cover body 2 and the upper end joint of nose pad 1 are provided with second clamp groove 24 on the outer nose cover body 2, and second clamp groove 24 cooperates the fixed nose oxygen pipe 3 of centre gripping with first clamp groove 14.

It should be noted that, in this embodiment, the nose oxygen tube 3 that is clamped and fixed is a conventional ear-hanging nose oxygen tube 3, two tube orifices or nasal plugs that can extend into the nostrils are provided on the ear-hanging nose oxygen tube 3 corresponding to the nostrils, also called a double-nose oxygen tube 3, and a portion of the nose oxygen tube 3 that is in contact with the skin at the front side of the nostrils and is provided with the tube orifices or nasal plugs is generally called a nose catheter; in this embodiment, when the nasal oxygen mask for assisting in oxygenation is applied, a part of the pipe orifice or the nasal plug on the nasal catheter can be cut off to reserve an oxygen outlet, then the nasal catheter is placed in a clamping groove of the nasal catheter 1, the oxygen outlet reserved by the nasal catheter is exposed, after the nasal catheter 1 is clamped and fixed with the outer nasal mask body 2, the nasal catheter 1 is attached to the front side of the outer nose, and the outer nasal mask body 2 is covered on the outer side of the outer nose, so that an oxygenation environment is formed, and the nasal oxygen catheter 3 can be rapidly matched for use.

It should be further noted that, the outer nose mask body 2 is set to be curved according to the shape characteristics of the outer nose on the face, in order to ensure oxygen supply to the nasal oxygen tube 3 and form an oxygenation environment outside the nostril, the side surface of the outer nose mask body 2 extends upwards along the nasolabial folds and is abutted with the surface of the nasolabial folds to form a certain sealing effect; then, the edge of the outer nose mask body 2 extends toward the nose bridge and is open without contacting the nose bridge; the upper end of the outer nose mask body 2 extends up to the root of the nose (the bridge between the eyes) of the nose.

In some examples, a nose tip limiting piece 22 is arranged in the oxygenation groove 21, and one end of the nose tip limiting piece 22 is fixedly connected with the inner side wall of the oxygenation groove 21.

It should be noted that, thereby the one end of nose tip spacing piece 22 can be with the nose tip butt of outer nose plays spacing effect to the nose oxygen cover, prevents that nose oxygen cover body 2 from upwards moving, prevents that the oxygen outlet of nose pipe from being blocked by outer nose surface skin, guarantees the oxygen outlet of nose pipe and goes out oxygen normally, guarantees the oxygen uptake of patient normal simultaneously.

It should be noted that, the nose tip limiting piece 22 is obliquely arranged in the oxygen increasing groove 21, when the nose oxygen mask is used for a long time, the nose tip limiting piece 22 is not required to be abutted with the nose tip of the outer nose all the time, and the purpose of arranging the nose tip limiting piece 22 is to ensure that a sufficient space is formed between the nose oxygen mask and the nostril outlet so as to ensure that the formed oxygen increasing environment is stable.

In some examples, nose bridge support 23 is disposed within oxygenation slots 21.

It should be noted that, the nose bridge support piece 23 is disposed at the top of the outer nose mask body 2, the nose bridge support piece 23 may be Y-shaped, one end of the nose bridge support piece is fixedly connected with the inner side wall of the oxygenation groove 21, the other end of the nose bridge support piece contacts with the nose bridge of the outer nose, and the top end of the outer nose mask body 2 has a supporting effect, so that the use safety of the nasal oxygen mask is ensured.

In some examples, the opposite sides of the outer nasal mask body 2 are each provided with a securing strap 4, one end of the securing strap 4 being fixedly connected to the outer nasal mask body 2.

The fixing band 4 may be fixed by tying a knot from the face to the hindbrain, or may be fixed by a lock catch.

In some examples, each fixing strap 4 is provided with a buckle strap 5 and a magic sub-patch, one end of the buckle strap 5 is fixedly connected with the fixing strap 4, and the other end of the buckle strap 5 is provided with a magic female patch matched with the magic sub-patch.

It should be noted that, in this embodiment, the nose catheter of the nose oxygen tube 3 is fixed by adopting the outer wall cover body and the nose pad 1 to cooperate and clamp, the nose oxygen tube 3 is also kept with a certain length, but the nose oxygen tube 3 can be wound around the ear, however, the situation that the hanging ear falls off due to the swinging of the head of the patient still exists, the nose oxygen tube 3 needs to be restrained and tidied, the buckle belt 5 is arranged on the fixing belt 4, the nose oxygen tube 3 after the hanging ear can be restrained, and of course, the buckle belt 5 is arranged on the surface of one side of the fixing belt 4, which is far away from the facial skin.

In some examples, the nosepiece 1 comprises: a nose patch 11; a baffle 12, wherein the baffle 12 is connected with the nose pad 11 at one side; side pieces 13 provided at both ends of the baffle 12, and each side piece 13 is provided with a first clamping groove 14.

It should be noted that, the included angle between the nose pad 11 and the baffle 12 is 90 °, and the side pads 13 disposed at two ends of the baffle 12 are integrally connected with the nose pad 11, so as to form a space for accommodating the nasal catheter; it can be understood that the outer nose cover 2 is provided with a notch for accommodating the nose pad 1 near the front side of the nostril, and after the outer nose cover 2 is clamped with the nose pad 1, the edges of the baffle 12 and the side pieces 13 are abutted with the surface of the notch of the outer nose cover 2, so that the sealing ring effect is better.

In some examples, the first clip groove 14 and the second clip groove 24 are each semi-circular.

It should be noted that, the radii of the first clamping groove 14 and the second clamping groove 24 are smaller than the radii of the two ends of the nasal catheter of the nasal oxygen cannula 3, and the radii of the first clamping groove 14 and the second clamping groove 24 are equal to the radius of the nasal oxygen cannula 3 connected with the nasal catheter, so as to limit the nasal catheter between the two side pieces 13; of course, in order to avoid that the nasal catheter is axially rotated so that the oxygen outlet on the nasal catheter cannot face the nostril, the radius of the first clamping groove 14 and the second clamping groove 24 can be properly smaller than the radius of the nasal oxygen cannula 3 body to increase the clamping force and thus the resistance of the nasal catheter to axial rotation.

In some examples, the nose piece 11 is arcuate.

In some examples, the side panels 13 are connected to the outer nasal mask body 2 by a snap assembly 15.

It should be noted that, two clamping assemblies 15 are disposed on each side piece 13, and the two clamping assemblies 15 are located at two sides of the first clamping groove 14 of the side piece 13, so that the two side pieces 13 are clamped with the outer nose mask body 2 through the four clamping assemblies 15 in total, and stability is better.

In some examples, the snap-in assembly 15 includes:

a fixing plate 151, one end of the fixing plate 151 is fixedly connected with the side plate 13, and the other end of the fixing plate 151 is provided with a clamping protrusion 153;

the clamping part 152, the clamping part 152 is arranged on the inner side of the outer nose cover body 2, and the clamping part 152 is provided with a clamping groove 154 matched with the clamping convex 153.

It should be noted that, the cross section of the slot 154 may be square, or may be semicircular, and of course, square is better; the cross section of the clamping convex 153 is triangular, square or semicircular, and particularly, the right angle or the obtuse angle triangle is preferable, and the clamping convex 153 with the obtuse angle triangle is clamped into the square clamping groove 154, so that the anti-falling effect is better.

The application method of the nasal oxygen mask for assisting oxygenation comprises the following steps: when the conventional ear-hanging type nasal oxygen tube 3 needs external oxygenation, the nasal oxygen mask is used for clamping and fixing the ear-hanging type nasal oxygen tube 3; firstly, cutting off a part of a pipe orifice on the nasal catheter, so that the whole width of the reserved convex part and the external nasal catheter does not exceed the width of the nose patch 11; then the nasal catheter part is placed in the first clamping groove 14 of the nose pad 1, and the oxygen outlet is adjusted; the outer nose cover body 2 is clamped and fixed with the nose pad 1, and the nose catheter is clamped and fixed; the outer nose cover body 2 is covered outside the outer wall of the patient, the position is adjusted, and the outer nose cover body is fixed by the fixing belt 4; starting an oxygen supply system to perform oxygen therapy; the fastening belt 5 is used for fixing and restraining the hanging lug part of the nasal oxygen cannula 3, namely the nasal oxygen mask for auxiliary oxygenation is installed and used.

The oxygen-increasing principle of the nose oxygen mask for assisting oxygen increasing is as follows: in order to put the orifice of the nasal oxygen tube 3 into the nostril, the stimulation is easy to cause, the orifice of the nasal oxygen tube 3 is externally arranged, and oxygen is easy to mix with the external air, but the oxygen content of oxygen inhalation of a patient is insufficient, the outer nasal mask body 2 is adopted, and local oxygenation is formed at the outer side of the nostril, so that the risk of oxygen reduction caused by contact with the external air is also reduced; the outer nose cover body 2 forms a space with the outer nose of the patient, on the one hand, part of air can be inhaled by the patient in the process of inhaling; on the other hand, during exhalation, a portion of the gas may be expelled through the gaps.

In the description of the present utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the system or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. A nasal oxygen mask for assisting oxygenation, characterized in that the nasal oxygen mask is used for clamping and fixing a nasal oxygen tube (3), and the nasal oxygen mask comprises:

the nose pad (1) is used for being attached to the air outlet of the nostril, and a first clamping groove (14) is formed in the upper side of the nose pad (1);

the nose mask comprises an outer nose mask body (2), wherein the outer nose mask body (2) is provided with an oxygenation groove (21) capable of accommodating an outer nose, the outer nose mask body (2) is connected with the upper end of a nose pad (1) in a clamping mode, a second clamping groove (24) is formed in the outer nose mask body (2), and the second clamping groove (24) is matched with the first clamping groove (14) to clamp and fix a nose oxygen tube (3).

2. The nasal oxygen mask for assisting in oxygenation according to claim 1, wherein a nasal tip limiting piece (22) is arranged in the oxygenation groove (21), and one end of the nasal tip limiting piece (22) is fixedly connected with the inner side wall of the oxygenation groove (21).

3. The oxygen mask for assisting in oxygen increasing according to claim 1, wherein a nose bridge support (23) is arranged in the oxygen increasing groove (21), and one end of the nose bridge support (23) is fixedly connected with the inner side wall of the oxygen increasing groove (21).

4. The oxygen-increasing assisting nose mask according to claim 1, wherein the opposite sides of the outer nose mask body (2) are provided with fixing belts (4), and one end of each fixing belt (4) is fixedly connected with the outer nose mask body (2).

5. The oxygen mask for assisting in oxygenation according to claim 4, wherein each fixing strap (4) is provided with a buckling strap (5) and a magic sub-patch, one end of the buckling strap (5) is fixedly connected with the fixing strap (4), and the other end of the buckling strap (5) is provided with a magic female patch matched with the magic sub-patch.

6. The oxygen mask for assisting in oxygenation according to any one of claims 1-5, wherein the nose pad (1) comprises:

a nose patch (11);

the baffle (12) is connected with the nose pad (11) at one side;

the side pieces (13) are arranged at two ends of the baffle piece (12), and the first clamping grooves (14) are formed in each side piece (13).

7. The oxygen-enhanced nasal mask of claim 6, wherein the first clip groove (14) and the second clip groove (24) are each semi-circular.

8. The oxygen-enhanced nasal mask according to claim 6, wherein the nose pad (11) is arc-shaped.

9. The oxygen-enhanced nasal mask according to claim 6, wherein the side pieces (13) are connected to the outer nasal mask body (2) by a clamping assembly (15).

10. The oxygen-enhanced nasal mask of claim 9, wherein the snap-fit assembly (15) comprises:

a fixing piece (151), wherein one end of the fixing piece (151) is fixedly connected with the side piece (13), and a clamping protrusion (153) is arranged at the other end of the fixing piece (151);

the clamping part (152), the clamping part (152) is arranged on the inner side of the outer nose cover body (2), and the clamping part (152) is provided with a clamping groove (154) matched with the clamping protrusion (153).