JP2018192131A - Mouth piece auxiliary tool and mouth piece assembly - Google Patents

Abstract

To provide a mouth piece auxiliary tool that has a flange part constituted separately from a mouth piece and can be retrofitted to an existing mouth piece, and to provide a mouthpiece assembly in which a mouth piece is attached with such the mouth piece auxiliary tool.SOLUTION: A mouthpiece auxiliary tool 1 includes a flange part 5. The flange part 5 is formed with a hole part 3 into which a mouthpiece 11 configured cylindrically can be inserted and widened in an outer peripheral direction of the hole part.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a mouthpiece auxiliary tool used by being attached to a mouthpiece, and a mouthpiece assembly including the mouthpiece auxiliary tool.

  2. Description of the Related Art Conventionally, in a mouthpiece that a subject puts in his / her mouth in a respiratory function test or the like, exhalation or inspiration (hereinafter, both referred to as breath) leaks from the gap between the outer peripheral surface of the cylindrical mouthpiece and the subject's lips. ing. Thus, for example, Patent Document 1 discloses that the mouthpiece is configured such that the diameter is reduced in the vicinity of the distance I from one end of the mouthpiece, and the cross-section expands from this portion toward the end. Yes. In that case, if a test subject bites a part with a reduced diameter with teeth, the part with the expanded cross section hits the lips, and the leakage of breath can be suppressed to some extent.

JP 2007-44291 A

  However, even in the mouthpiece described in Patent Document 1, it is not easy for the subject to bring the lips into close contact with the outer peripheral surface of the mouthpiece configured so that the cross-sectional shape is circular or oval, and breathing is sufficiently performed. It may not be possible to suppress it.

  Therefore, one aspect of the present disclosure provides a mouthpiece assisting device that can suppress breath leakage even with an existing mouthpiece, and a mouthpiece assembly in which the mouthpiece assisting device is mounted on the mouthpiece. The purpose is to do.

  An auxiliary tool for a mouthpiece as one aspect of the present disclosure is configured separately from the mouthpiece (11) configured in a cylindrical shape, and has a hole (3) into which the mouthpiece can be inserted, and A flange (5) extending in the outer peripheral direction of the hole is provided.

  For this reason, according to the present disclosure, when the mouthpiece is inserted into the hole, a mouthpiece assembly having the same configuration as that of the mouthpiece with the hook is completed. That is, the buttocks can be retrofitted to an existing mouthpiece. If the buttock is placed in the oral vestibule created between the mucous membrane inside the lips and the upper and lower teeth, the lip adheres to the inner mucous membrane of the lips, and the lips adhere to the outer peripheral surface of the mouthpiece. Even if not, it is possible to suppress breath leakage.

  In addition, the code | symbol in the parenthesis described in this column and a claim shows the correspondence with the specific means as described in embodiment mentioned later as one aspect, Comprising: The technical scope of this invention is shown. It is not limited.

It is a front view showing the auxiliary tool for mouthpieces of 1st Embodiment. It is a side view showing the mouthpiece assembly using the auxiliary tool for mouthpieces. It is a cutting end view showing the mouthpiece auxiliary tool in the mouthpiece assembly. It is a side view showing the usage method of the mouthpiece assembly. It is a front view showing the usage method of the mouthpiece assembly. It is sectional drawing showing the modification of the said mouthpiece assembly. It is a front view showing the structure of the sealing part in the mouthpiece assembly. It is the cutting | disconnection end elevation showing the other modification of the said mouthpiece assembly. It is a front view showing the auxiliary tool for mouthpieces of 2nd Embodiment. It is a front view showing the auxiliary tool for mouthpieces of 3rd Embodiment. It is a side view showing the mouthpiece assembly using the auxiliary tool for mouthpieces.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Structure of auxiliary tool for mouthpiece]
As shown in FIG. 1, the mouthpiece auxiliary tool 1 according to the first embodiment is, for example, a collar portion 5 in which a hole portion 3 into which a mouthpiece 11 configured in a cylindrical shape can be inserted as shown in FIG. 2 is formed. It has. The flange portion 5 is formed in a planar shape extending in the outer peripheral direction of the hole portion 3 by a thick paper having a water-repellent finish on the surface, and the outer periphery and the inner periphery of the hole portion 3 are formed in an elliptical shape.

  A plurality of cuts 7 are formed radially around the hole 3. The hole 3 is formed to have a slightly smaller diameter than the outer periphery of the mouthpiece 11. In addition, the cuts 7 are formed such that an ellipse connecting the ends of the cuts 7 has a slightly larger diameter than the outer periphery of the mouthpiece 11. In addition, the outer periphery of the mouthpiece 11 is an outer periphery in the cross section orthogonal to the axis | shaft of the cylinder which the said mouthpiece 11 comprises. This outer periphery also has an elliptical shape similar to the hole 3. For this reason, the portion sandwiched between the pair of adjacent cuts 7 in the flange portion 5 is configured as the following return portion 5A.

[1-2. Composition of mouthpiece assembly]
The mouthpiece assembly 10 shown in FIGS. 2 and 3 includes two mouthpiece assisting devices 1 described above (hereinafter referred to as mouthpiece assisting devices 1A and 1B, respectively, if necessary), A single mouthpiece 11 is used.

  The mouthpiece 11 is inserted into the hole portion 3 from the one end 11 </ b> A side of the mouthpiece 11 in the mouthpiece auxiliary tool 1 </ b> A. Then, the return portion 5 </ b> A in the mouthpiece auxiliary tool 1 </ b> A is folded along the insertion direction of the mouthpiece 11. For this reason, the return portion 5A allows the movement of the mouthpiece 11 in the insertion direction with respect to the hole 3 (that is, the right direction in FIGS. 2 and 3), and what is the insertion direction with respect to the hole 3? The movement of the mouthpiece 11 in the reverse direction (that is, the left direction in FIGS. 2 and 3) is suppressed. FIG. 3 shows a state after the mouthpiece 11 is inserted as the mouthpiece auxiliary tools 1A and 1B on the III-III line cut end surface of the mouthpiece auxiliary tool 1 shown in FIG.

  On the other hand, the mouthpiece 11 is inserted into the hole 3 from the other end 11 </ b> B side of the mouthpiece 11 in the mouthpiece auxiliary tool 1 </ b> B. Then, the return portion 5 </ b> A in the mouthpiece auxiliary tool 1 </ b> B is folded along the insertion direction of the mouthpiece 11. Therefore, the return portion 5A allows the movement of the mouthpiece 11 in the insertion direction with respect to the hole 3 (that is, the left direction in FIGS. 2 and 3), and what is the insertion direction with respect to the hole 3? The movement of the mouthpiece 11 in the reverse direction (that is, the right direction in FIGS. 2 and 3) is suppressed.

  For this reason, when the planar eaves 5 in each mouthpiece auxiliary tool 1A, 1B overlap each other as shown in FIG. 2 and FIG. 3, the pair of mouthpiece auxiliary tools 1A, 1B are in either direction. It doesn't move. Thus, the mouthpiece assembly 10 of this embodiment is comprised by retrofitting the mouthpiece auxiliary tools 1A and 1B to the existing mouthpiece 11 in this way.

  In addition, each collar part 5 in auxiliary tools 1A and 1B for mouthpieces may just be piled up, and may be adhere | attached with an adhesive agent etc. Further, when one end 11A of the mouthpiece 11 is the side to be applied to the subject, the mouthpiece assisting devices 1A and 1B are placed on the side closer to the one end 11A than the other end 11B, as shown in FIGS. The parts 5 are preferably overlapped with each other.

  4 and 5, the mouthpiece assembly 10 configured in this way is inserted into the oral cavity from the one end 11 </ b> A by the subject 90, and the buttocks 5 are inserted into the mucous membrane inside the lips 91 and the upper and lower teeth 92. Used in the vestibule of the oral cavity created between the two.

[1-3. effect]
According to the first embodiment described in detail above, the following effects are obtained.
(1A) The mouthpiece assembly 10 of the present embodiment is used with the buttocks 5 in the oral vestibule as described above. Thereby, since the buttocks 5 are in close contact with the inner mucous membrane of the lips 91, even if the lips 91 are not in close contact with the outer peripheral surface of the mouthpiece 11, the gap between the lips 91 and the mouthpiece 11 (for example, the corner of the mouth). It is possible to suppress the leakage of breath.

  (1B) According to the present embodiment, when the mouthpiece 11 is inserted into each hole 3 in each mouthpiece auxiliary tool 1A, 1B, the same configuration as the mouthpiece with a hook integrally molded with resin or the like The mouthpiece assembly 10 having the above is completed. That is, in order to provide the collar part on the outer peripheral surface of the mouthpiece, if the collar part is molded integrally with the mouthpiece with a resin or the like, the manufacturing cost of the mouthpiece with the collar increases. 5 can be retrofitted to the existing mouthpiece 11.

  Moreover, since the cheap thing made from paper can be used as the mouthpiece 11, and the auxiliary tool 1 for mouthpieces is also made from paper, since it only costs about 20 yen, the auxiliary tool 1 for mouthpieces of this embodiment and The mouthpiece assembly 10 can be disposable in a medical institution or the like. That is, when using a mouthpiece with a brace integrally molded with a resin or the like as described above, in a medical institution or the like, the mouthpiece with a brace cannot be made disposable like an existing mouthpiece, It will be washed and reused. On the other hand, in this embodiment, the increase in the management cost of the mouthpiece in a medical institution etc. can be suppressed by making it disposable as mentioned above.

  (1C) In the mouthpiece auxiliary tool 1 of the present embodiment, the surface of the paper constituting the collar portion 5 is water-repellent. For this reason, with respect to the respiratory function test in which one test time is 5 to 10 minutes, sufficient strength can be secured during at least one test.

  (1D) The return portion 5A of the mouthpiece assisting tool 1 allows the movement of the mouthpiece 11 in the insertion direction by being folded along the insertion direction of the mouthpiece 11, and what is the insertion direction? The movement of the mouthpiece 11 in the reverse direction is suppressed. For this reason, the movement of the mouthpiece 11 with respect to the buttocks 5 can be restricted with a simple configuration, and it is also easy to suppress only the mouthpiece 11 from jumping out of the mouth of the subject 90 or the like during a respiratory function test or the like. Can do.

  (1E) Furthermore, in the mouthpiece assembly 10, the mouthpiece auxiliary tools 1A and 1B are inserted from the end portions 11A and 11B opposite to the mouthpiece 11, and the mouthpiece 5 overlaps the mouthpiece. 11 is positioned. For this reason, the position of the collar part 5 with respect to the mouthpiece 11 can be stably positioned with a simple configuration.

  (1F) Moreover, in the said embodiment, since the outer periphery of the heel part 5 is an ellipse, the said heel part 5 can be inserted in the said oral vestibule part more easily, and it is one layer in the oral cavity front yard part. It can be easily adhered. For this reason, it is possible to better suppress the leakage of breath as described above.

  (1G) Moreover, in this embodiment, the inner periphery of the hole 3 is elliptical. For this reason, the mouthpiece assembly 10 can be assembled by inserting the mouthpiece 11 having an elliptical outer periphery into the hole 3. The mouthpiece 11 having an elliptical outer periphery is easier for the subject 90 to hold and the lips 91 are in close contact with the outer peripheral surface of the mouthpiece 11 than the mouthpiece having a circular outer periphery. For this reason, in the present embodiment, it is possible to more satisfactorily prevent the breath from leaking and the mouthpiece 11 from jumping out of the mouth.

[1-4. Modification Example of Mouthpiece Assembly Using Mouthpiece Auxiliary Tool of First Embodiment]
In the said embodiment, although each collar part 5 in auxiliary tools 1A and 1B for mouthpieces has overlapped, it is not limited to this. For example, like a mouthpiece assembly 10A shown in FIG. 6, a resin or rubber sealing portion that suppresses air from leaking between the flange portions 5 of the mouthpiece auxiliary tools 1A and 1B. 13 may be inserted.

  In the example shown in FIG. 6, the sealing portion 13 has an annular, rubber band-like structure whose cross section cut in the radial direction is a substantially square. Further, as shown in FIG. 7, the sealing portion 13 has an inner peripheral surface on the outer peripheral side with respect to the inner peripheral surface of the hole portion 3, and an inner peripheral side with respect to an ellipse connecting the ends of the cuts 7 The size and arrangement are defined so as to exist. Note that FIG. 6 is a cross-sectional view taken along line VI-VI of the mouthpiece assisting tool 1 and the sealing portion 13 shown in FIG. 7 after the mouthpiece 11 is inserted as the mouthpiece assisting tool 1A, 1B. Represents a state.

  In the mouthpiece assembly 10A configured as described above, the leakage of air from between the flanges 5 of the mouthpiece auxiliary tools 1A and 1B is suppressed by the sealing portion 13, and the respiratory function test is performed as described above. It is possible to better suppress the leakage of breath. Further, the mouthpiece auxiliary tools 1 </ b> A and 1 </ b> B can be prevented from being displaced from the mouthpiece 11. In addition, the structure of a sealing part is not limited to this, For example, a more planar shape may be sufficient.

  Moreover, even if each heel part 5 in the mouthpiece auxiliary tools 1A and 1B overlaps, like the mouthpiece assembly 10B shown in FIG. 8, the return part 5A and the mouthpiece 11 of each heel part 5 respectively. An annular member 15 made of resin or rubber may be sandwiched between the two. In the example of FIG. 8, the annular member 15 is configured in an annular shape that is in close contact with the outer peripheral surface of the mouthpiece 11. The return portions 5A of the mouthpiece auxiliary tools 1A and 1B are in close contact with the outer peripheral surface of the annular member 15. For this reason, the annular member 15 suppresses air from leaking from between the flanges 5 and the mouthpieces 11. Accordingly, in this case as well, it is possible to more effectively suppress the leakage of breath during the respiratory function test as described above.

  In this case, the annular member 15 and the mouthpiece auxiliary tools 1A and 1B may be combined with each other as shown in FIG. Alternatively, the mouthpiece 11 may be attached to the mouthpiece 11 first, and the mouthpiece auxiliary tools 1A and 1B may be attached to the mouthpiece 11 from both ends 11A and 11B of the mouthpiece 11.

[2. Second Embodiment]
[2-1. Difference from the first embodiment]
Since the basic configuration of the second embodiment is the same as that of the first embodiment, differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  In the mouthpiece auxiliary tool 1 of the first embodiment described above, the outer periphery of the collar portion 5 is configured in an elliptical shape having a certain major axis and minor axis. On the other hand, the mouthpiece auxiliary tool 21 of the second embodiment is different in that it is configured so that the diameter of the collar portion 5 can be reduced as necessary, as described below. As shown in FIG. 9, two cut lines 5 </ b> B (that is, perforations) configured in an elliptical shape having different sizes are formed on the collar portion 5 of the mouthpiece auxiliary tool 21. The inner cut line 5B includes the hole 3, the outer cut line 5B includes the inner cut line 5B, and is configured to be arranged and sized to be included on the outer periphery of the flange 5. . By cutting the flange portion 5 with any one of the cut lines 5B, the outer peripheral portion of the flange portion 5 can be removed from the cut line 5B.

[2-2. effect]
According to 2nd Embodiment described above, there exist the effect (1A)-(1G) of 1st Embodiment mentioned above, and also there exist the following effects.

  (2A) As an average size of the mouth circumference of a Japanese adult male, it is known that the cleft width is about 50 mm and the vertical width of the oral vestibule is about 35 mm. Therefore, it is desirable that the shape of the flange portion 5 is an elliptical shape having a major axis of 60 mm and a minor axis of about 40 mm. However, females have a short cleft width of about 46 mm. Further, the older the elderly, the wider the fissure width is about 56 mm. In the present embodiment, the cut line 5B can be formed at an appropriate position according to such an age difference or sex difference. In that case, it is possible to select an appropriate cut line 5B according to the age and sex of the subject 90, and to remove the buttocks 5 on the outer peripheral side. By doing so, regardless of the age and sex of the subject 90, it is possible to more reliably perform the suppression of breath leakage as described above.

  For children and large races, it is necessary to prepare larger or smaller ones, and conventional silicone mouthpieces provide multiple parts for adults and children. On the other hand, since the mouthpiece auxiliary tool 21 is made of paper, it is possible to adjust the collar 5 to a desired size by forming a plurality of cut lines 5B. For example, the heel part 5 may be formed into a maximum size (for example, 60 mm × 40 mm or more), and cut into the various sizes according to the subject 90 to be used.

[3. Third Embodiment]
[3-1. Difference from the first embodiment]
Since the basic configuration of the third embodiment is the same as that of the first embodiment, differences will be described below. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  In the mouthpiece auxiliary tool 1 of the first embodiment described above, the outer periphery of the collar portion 5 is configured in a simple elliptical shape. On the other hand, the mouthpiece auxiliary tool 31 of the third embodiment is such that a pair of rectangular engaging portions 51 protrude from both ends of the short diameter direction of the collar portion 5 as shown in FIG. Become. Note that the pair of engaging portions 51 are configured by thick paper that is integral with the flange portion 5. A folding line 53 is set at each engaging portion 51 at a position closer to the base of the flange portion 5 than the tip thereof. The fold line 53 is set in parallel with the major axis direction of the flange portion 5. Further, a linear fold line 54 is set on the root of the flange portion 5, that is, on an elliptical extension line constituting most of the outer periphery of the flange portion 5.

  The mouthpiece assembly 30 shown in FIG. 11 includes a mouthpiece auxiliary tool 31 from one end 11A of the mouthpiece 11 and a mouthpiece auxiliary tool 1 of the first embodiment from the other end 11B of the mouthpiece 11, respectively. It is configured to be inserted along. Similar to the mouthpiece assembly 10 of the first embodiment, after the heel part 5 of the mouthpiece assisting tool 1 and the heel part 5 of the mouthpiece assisting tool 31 are overlapped, the engaging parts 51 are formed by folding lines 53 and 54. Is folded. Then, the front end of the engaging part 51 reaches the back side of the collar part 5 in the mouthpiece auxiliary tool 1 (that is, the surface opposite to the mouthpiece auxiliary tool 31), and the engaging part 51 is the mouthpiece auxiliary tool. 1 is engaged with the flange 5.

[3-2. effect]
According to 3rd Embodiment described above, there exist the effect (1A)-(1G) of 1st Embodiment mentioned above, and also there exist the following effects.

  (3A) In this embodiment, the engaging part 51 in the mouthpiece auxiliary tool 31 is engaged with the collar part 5 in the mouthpiece auxiliary tool 1. For this reason, the collar parts 5 in each auxiliary tool 1 for mouthpieces 1 and 31 can be hold | maintained more stably in the state which mutually overlapped. Therefore, in the present embodiment, the occurrence of the breath leak can be more effectively suppressed.

  (3B) In addition, the mouthpiece auxiliary tools 1, 31 can be held in the mouthpiece 11 by stably holding the heel portions 5 of the mouthpiece auxiliary tools 1, 31 in an overlapping state. It is possible to further suppress the deviation from the above.

[4. Other Embodiments]
As mentioned above, although the form for implementing this indication was demonstrated, this indication is not limited to the above-mentioned embodiment, and can carry out various modifications.

  (4A) Although the mouthpiece auxiliary tools 1, 21 and 31 of each of the above embodiments are made of paper, they are not limited to this. For example, you may comprise the same mouthpiece auxiliary tool with resin, such as silicone, and rubber | gum. In that case, the hole portion may be formed smaller than the outer diameter of the mouthpiece and elastically deformed at the time of insertion of the mouthpiece, so that the cut and return portions may be omitted.

  (4B) Moreover, you may cut and raise a part of paper which comprises a collar part, and may provide the part which bites with a tooth | gear. In this case, the subject can hold the mouthpiece assembly in the oral cavity by biting the portion.

  (4C) Moreover, although the outer periphery of the collar part 5 was comprised in the ellipse shape in each said embodiment, it is not limited to this. For example, the shape of the outer periphery of the collar portion may be a rhombus or a hexagon. Also, the shape of the inner periphery of the hole can be various shapes according to the shape of the mouthpiece to be inserted, such as a perfect circle or other shapes.

  (4D) Moreover, in each said embodiment, although the return part 5A was folded along the insertion direction of the mouthpiece 11, it is not limited to this. For example, the return portion may be alternately folded in advance in the insertion direction and the opposite direction. Further, the mouthpiece auxiliary tools 1A and 1B may be inserted with the mouthpiece in an integrated state in advance. However, the insertion of the mouthpiece may be easier in the configuration in which the return portion is folded back in the insertion direction as the mouthpiece is inserted as described above.

  (4E) Moreover, in each said embodiment, although a pair of mouthpiece auxiliary tool was inserted from both ends 11A, 11B of the mouthpiece 11, it is not limited to this. For example, only one mouthpiece auxiliary tool 1 of the first embodiment may be inserted into the mouthpiece 11.

  (4F) A plurality of functions of one constituent element in the embodiment may be realized by a plurality of constituent elements, or a single function of one constituent element may be realized by a plurality of constituent elements. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified only by the wording described in the claim are embodiment of this invention.

DESCRIPTION OF SYMBOLS 1, 1A, 1B, 21, 31 ... Mouthpiece auxiliary tool 3 ... Hole part 5 ... Gutter part 5A ... Return part 5B ... Cut-off line 7 ... Notch 10, 10A, 10B, 30 ... Mouthpiece assembly 11 ... Mouthpiece 13 ... sealing part 15 ... annular member 51 ... engagement part

Claims (14)

A mouthpiece (5) that is formed separately from the mouthpiece (11) configured in a cylindrical shape, has a hole (3) into which the mouthpiece can be inserted, and that extends in the outer circumferential direction of the hole. ,
A mouthpiece accessory provided. The auxiliary tool for a mouthpiece according to claim 1,
The buttock is a mouthpiece auxiliary tool made of paper. The mouthpiece assisting device according to claim 1 or 2,
The hole is formed with a smaller diameter than the outer periphery of the mouthpiece,
A plurality of cuts (7) formed radially from the periphery of the hole in the flange around the hole;
The mouse in the insertion direction with respect to the hole by being folded along the insertion direction of the mouthpiece with respect to the hole by being formed by the flanges sandwiched between a pair of adjacent cuts formed A return portion (5A) configured to allow movement of a piece and to suppress movement of the mouthpiece in a direction opposite to the insertion direction with respect to the hole;
An auxiliary tool for a mouthpiece further comprising: It is an auxiliary tool for mouthpieces according to any one of claims 1 to 3,
An auxiliary tool for a mouthpiece, wherein the outer periphery of the buttocks is elliptical. The mouthpiece assisting device according to any one of claims 1 to 4,
An auxiliary tool for a mouthpiece, wherein the inner periphery of the hole is elliptical. The mouthpiece assisting device according to any one of claims 1 to 5,
A tear line (5B) formed on the collar and configured to be able to reduce the diameter of the collar by removing the outer peripheral part of the collar,
An auxiliary tool for a mouthpiece further provided. The mouthpiece assisting device according to any one of claims 1 to 6,
An engaging portion (51) that is formed on the collar and engages with the collar in the other mouthpiece assist when the collar is overlapped with the collar in the other mouthpiece assist.
An auxiliary tool for a mouthpiece further provided. A mouthpiece auxiliary tool (1) having a hole (3) into which a mouthpiece (11) configured in a cylindrical shape can be inserted and having a flange (5) extending in the outer peripheral direction of the hole. , 21, 31),
A mouthpiece (11) configured in the tubular shape and inserted into the hole;
Mouthpiece assembly with. The mouthpiece assembly according to claim 8,
The hole is formed with a smaller diameter than the outer periphery of the mouthpiece,
A plurality of cuts (7) formed radially from the periphery of the hole in the flange around the hole;
The mouse in the insertion direction with respect to the hole by being folded along the insertion direction of the mouthpiece with respect to the hole by being formed by the flanges sandwiched between a pair of adjacent cuts formed A return portion (5A) configured to allow movement of a piece and to suppress movement of the mouthpiece in a direction opposite to the insertion direction with respect to the hole;
A mouthpiece assembly further comprising: The mouthpiece assembly according to claim 9,
Two mouthpiece auxiliary tools (1, 21, 31) are provided, and any one of the flanges (5) is configured in a plane,
Since the insertion direction of the mouthpiece into the hole with respect to each of the mouthpiece auxiliary tools is different, the return portion provided in each of the mouthpiece auxiliary tools is on the side away from the other collar portion. Folded mouthpiece assembly. The mouthpiece assembly according to claim 10,
A mouthpiece assembly in which the collars overlap. The mouthpiece assembly according to claim 10,
A mouthpiece assembly in which a sealing part (13) made of resin or rubber that suppresses air from leaking between the collar parts is sandwiched between the collar parts. The mouthpiece assembly according to any one of claims 10 to 12,
A mouthpiece assembly in which at least one of the collars is provided with an engagement part (51) engaged with the other collar. The mouthpiece assembly according to any one of claims 9 to 13,
A mouthpiece assembly in which an annular member (15) made of resin or rubber that suppresses air leakage from between the flange and the mouthpiece is sandwiched between the return portion and the mouthpiece.