WO1997006052A1

WO1997006052A1 - Breathing hose for a diving breathing device

Info

Publication number: WO1997006052A1
Application number: PCT/JP1995/001560
Authority: WO
Inventors: Mitsuyoshi Tanaka
Original assignee: Grand Bleu Inc.
Priority date: 1995-08-03
Filing date: 1995-08-03
Publication date: 1997-02-20
Also published as: AU3191395A; EP0784009A1; KR970706167A

Abstract

When viewed in a cross section taken along an axial direction (50a), a breathing hose (50) for a diving breathing device comprises a circumferential wall (51) constituted by an outwardly projecting thicker portions (52) flat on an internal circumferential surface thereof and thinner portions (53) bent inwardly at a small curvature which are disposed in an alternate fashion. Since the internal circumferential surface (51a) is practically a flat surface, there is no risk of causing a sanitary problem as is encountered with a bellows hose where dirty matters accumulate in recessed portions to permet propagation of various germs. In addition, thinner portions provide flexibility required for a breathing hose.

Description

Description Name of Invention

Diving hoses for dive respirators Technical Field ''

The present invention relates to an improvement in a flexible breathing hose used in a diving breathing apparatus. Background art

Diving respirators are generally classified into two types: open respirators and closed or semi-closed respirators. In an open-type breathing apparatus, all gas once breathed is discharged out of the apparatus, and in a closed-type or semi-closed-type respiratory apparatus, a device that can rebreath the breathed gas is built in. ing.

When diving with open respirators, the same volume of gas is breathed, regardless of ambient pressure or depth. Therefore, the consumption of respiratory gas increases as the ambient pressure increases. If a gas cylinder is used, that is, if the amount of breathable gas is limited, the dive time will decrease as the depth increases.

In contrast, closed and semi-closed respirators use compressed gas as the respiratory source, as in the open type, but the same weight of gas is breathed regardless of the ambient pressure. Therefore, in the closed type and semi-closed type, the consumption of breathing gas is constant regardless of the depth. For this reason, the amount of respiratory gas to be carried is significantly smaller than that of the open type, and by changing the mixing ratio of the respiratory gas, it is possible to dive for a long time to a depth that is not possible with the open type. it can. In this way, closed or semi-closed respirators have the advantage of being lighter in weight and capable of deep diving for a longer time than open respirators. However, conventional closed and semi-closed respirators have been developed for special diving and military purposes, so they have only minimal safety mechanisms and are relatively prone to emergencies. There is no mechanism to deal with the situation. For this reason, the use of these devices required considerable thorough training, and leisure divers could not use them easily.

However, with the increasing number of diving enthusiasts, there has been a demand for diving using such closed or semi-closed respirators without much need for complicated operations and skills. I'm getting high. Here, carbon dioxide adsorbents used in closed and semi-closed respirators can be significantly degraded by water intrusion. Therefore, these closed and semi-closed respirators have so far been used by military personnel and professionals, and considerable training has been given to keeping water out of the manually openable mouthpiece. Was needed. However, in order for leisure divers to use them easily and without mistake, according to a manufacturer, it is said that the training time required by conventional manual methods is at least 40 hours. Took too much training time. Of course, training costs will also increase.

Here, closed respirators are equipped with oxygen concentration sensors, etc., and considerable training is required in their handling, control, monitoring, etc. In contrast, semi-closed respirators do not have such equipment and, therefore, do not require training to operate them, making them relatively easy for non-experts to handle.

Therefore, it would be very convenient if this semi-closed respirator could be used more easily than before, but easily and without operational errors. In order to make it easy to use, the applicant can first easily control the supply of intake gas from a gas cylinder in Japanese Patent Application No. 5 _ 2 7 4 843. In addition, when the mouthpiece comes out of the diver's mouth, a semi-closed respirator that can automatically shut off the passage of exhalation gas and automatically prevent water from entering the inside of the device is provided. is suggesting.

The configuration of the semi-closed respirator will be described with reference to FIGS. 9 to 13.

As shown in FIG. 9, the semi-closed breathing apparatus 1 includes a hollow housing 2, and device components to be described later are built in the hollow housing 2. One side of this hollow housing 2 is a backing surface 2a that contacts the back of a diver, and an opening for exchanging breathing gas cylinders is formed in the center of the opposite surface. 2b is installed. At the upper end of the hollow housing 2, a container 3 with a built-in carbon dioxide adsorption device is horizontally mounted. This container has a cylindrical shape as a whole, and a flexible expiratory tube 4 and an inspiratory tube 5 are connected to outer peripheral portions on both sides thereof. The distal ends of the expiratory tube 4 and the inspiratory tube 5 are connected to a mouthpiece unit 6.

As can be seen from FIG. 10, the respiratory air circulation chamber 61 in the mouthpiece unit 6 communicates with the expiratory tube 4 and the inspiratory tube 5. The other end of the exhalation tube 4 and the other end of the inhalation tube 5 communicate with both side portions of the cylindrical container 3 in which the carbon dioxide adsorption device 7 is built. That is, a carbon dioxide adsorbing device 7 having an annular cross section is built in the center of the container 3, and an exhalation passage 31 and an inhalation passage 32 are formed on both sides thereof. In the hollow housing 2 below the container 3 in which the carbon dioxide adsorbing device 7 is built, a breathing gas cylinder 8 is arranged in the center in the vertical direction. Intake air bar Tag 1 1 is arranged. The exhalation air bag 9 communicates with the exhalation passage 3 1 of the container 3, and the inhalation air bag 1 1 communicates with the inhalation passage 3 of the container 3.

Communicates with 2.

The breathing gas cylinder 8 is disposed such that its gas discharge port 81 is located at the lower end, and this gas discharge port 81 is connected to a regulator 83 via an on-off valve 82. 8 3

Reduce the pressure to about 7 kilograms Z square centimeters. Regille

Three gas supply pipes are connected to 3, three of which are for the residual pressure indicator, for the BC jacket, and for the oct path (not shown). The remaining one is branched into three on the way, and one of the gas supply pipes 84 passes through the intake passage 3 2 and the intake pipe 5 of the container 3 with built-in carbon dioxide adsorption device, It extends into the sunit. An orifice 84a for flow adjustment is inserted in the middle position, through which the flow rate is adjusted to 4 to 5 liters in terms of atmospheric pressure, and the mouthpiece unit is adjusted. To be supplied to the customer. Already

One gas supply pipe 85 is a gas supply pipe for purging used for draining water from the mouthpiece unit 6, and is the same as the gas supply pipe 84 described above. Extending into the interior. The remaining one gas supply pipe 86 is for supplying intake air in an emergency, and its tip is located in the intake passage 32 of the container 3.

An auto-valve mechanism is provided at the intake side end of the container 3 with a built-in carbon dioxide adsorption device.

1 2 are installed. The mechanism 12 controls the opening and closing of the gas supply pipe 86 and the automatic discharge control of excess gas.

The overall gas flow is as follows. Expiration from the mouthpiece 6 2 of the mouthpiece unit 6 is stored in the expiration airbag 9 via the expiration tube 4 and the expiration passage 31. During the inhalation operation, the exhaled air stored here is cleaned by removing carbon dioxide through the carbon dioxide adsorption device 7. And flows into the intake passage 32. The purified expiration is stored in an intake air bag 11 and is supplied into the mouse unit 6 via an intake pipe 5 for inhalation. A constant amount of new intake gas is constantly introduced into the mouthpiece unit 6 from the cylinder 8 via the gas supply pipe 84, and the mixed gas is supplied as the intake gas.

Figures 11, 12, and 13 show the mouthpiece unit. The mouthpiece unit 6 is composed of a breathing air circulation chamber 61 formed in a case 63 having a rectangular parallelepiped shape as a whole, and a mouthpiece 62 attached to an opening 63 opened on one side of the case 63. It is configured. The left and right sides of the case 63 are provided with an expiration opening 64 and an intake opening 65, respectively. The exhalation tube 4 is connected to the exhalation opening 64 via a check valve 66 that allows only fluid to pass to the side of the exhalation tube 4. Similarly, the intake opening 65 is connected to the intake pipe 5 via a check valve 67 that permits only the passage of fluid from the intake pipe 5. In addition, two gas supply pipes 84, 85 disposed therein extend through the intake opening 65 into the respiratory air circulation chamber 61 in the mouthpiece unit. As shown in FIG. 7, in the respiratory air circulation chamber 61, on-off valves 611 and 612 are attached to the inner peripheral surface of the end wall 61a. A gas supply pipe 84 is connected to the on-off valve 6 11, and a gas supply pipe 85 is connected to the on-off valve 6 12. By pushing in the working ports 6 11 a and 6 12 a of these on-off valves 6 1 1 and 6 1 2, they open, and gas is supplied into the respiratory air flow chamber 61. ing.

The lower end of a revolving plate 613 for moving the opening 611a of the opening / closing valve 611a for supplying the gas for intake is in contact with the tip of the opening 611a. The revolving plate 6 13 is supported by a rotating shaft 6 14 at a central position in the vertical direction. This rotating shaft 6 1 4 is It is hung between the side walls 61b and 61c in a rotatable manner. The upper end of the revolving plate 613 is rotatably connected to the base end of the horizontal moving plate 615. The horizontal moving member 615 is arranged at the position of the height of the opening 163a, and the cylindrical projection 615a on the tip side penetrates the case end wall 161a to the outside. It is protruding. A disk-shaped push button 616 is attached to this protruding portion. The horizontal moving member 6 15 is always provided with elastic force toward the end wall 61 a by a spring member (not shown). Therefore, the push button 6 16 It is in contact with the bush button stop 6 16a attached to the case end wall 6 1a.

On the other hand, to the base end of the horizontal moving plate 6 15, the base ends of a pair of tuning pieces 6 17 are connected. The tip end side of this tuning piece 6 17 protrudes to the position of the outer surface of mouthpiece 62 through opening 63 a. This protruding part is formed thick so that a diver can easily hold it with his teeth.

Next, as can be seen from FIGS. 12 (B) and 13, an expiratory tube closing valve 6 21 is attached to a portion of the rotating shaft 6 14 on the side of the expiratory tube. Below the exhalation tube opening / closing valve 6 21, an opening 6 2 3 of the exhalation passage 6 22 connected to the exhalation opening 6 4 is located. A spring member 624 is stretched between the valve 621 and the inside of the opening 623. Therefore, in a normal state, the opening 6 23 is closed by the valve 6 21 by the spring force of the spring member and the spring force of the spring member biasing the revolving plate 6 13. I have. However, when the above-mentioned bush button 6 16 is depressed, the rotation shaft 6 14 rotates, and in conjunction with this rotation, the exhalation-tube on-off valve 6 21 turns upward to open the exhalation passage opening 6 2 3 Opens, and it is in a state of communicating with the respiratory airflow passage 61 in the mouthpiece unit. The operation of the intake gas supply control mechanism thus configured will be described. In a normal state where the push button 616 is not pushed, the on-off valve 611 attached to the tip of the intake gas supply pipe 84 is in the closed state. The opening 6 23 of the exhalation passage 62 2 is also closed by the valve 62 1. In this state, when the push button 616 is staked into the elastic force and pushed in, the horizontal moving plate 615 moves to the mouthpiece 62 side, and the tuning piece connected to the original end thereof is moved. 6 17 is projected from the mouse piece 62 to the outside. In addition, the pivoting plate 613 rotates in the direction of the arrow shown in Fig. 12 (A) around the rotating shaft 614 by the base end of the horizontal moving plate 615, and the operating rod is rotated by the lower end. 6 1 1 Press a. As a result, the valve 611 is opened, and the supply of the intake gas is started. Here, the push button and the horizontal moving plate 6 15 try to move to the original state by the elastic force, but the diver engages the tuning piece 6 17 projecting from the mouthpiece 62 with the teeth. When the mouthpiece 62 is inserted into the mouth and the mouth is closed, such a state is maintained. Therefore, the supply of intake gas at a constant flow rate is continuously performed.

When the push button is pushed in, the exhalation-tube closing valve 6 21 also turns in the direction of the arrow to open the opening 6 2 3 of the exhalation passage 6 22. As a result, the exhalation tube 4 is in communication with the respiratory air flow chamber 61 of the mouthpiece unit via the check valve 66. Therefore, it is possible to perform a breathing motion. When the mouthpiece 62 is removed from the mouth after diving, each part returns to its original state due to elastic force, and the supply of intake gas stops.

Here, if the diver accidentally removes the mouthpiece 62 from his / her mouth, water enters through the mouthpiece 62. Since the check valve 67 is attached to the connection portion of the intake pipe 5, it is possible to prevent water from entering the intake pipe 5, but water may enter the expiration pipe 4. However, the expiratory tract closure valve 6 2 1 linked to the push button 6 1 6 In such a state, the respiratory tract closing valve 6 21 returns to its original state by the elastic force, and closes the opening 6 2 3 of the exhalation passage 6 22. Therefore, it is possible to prevent water from entering the expiratory tube 4.

As described above, the supply of the intake gas can be started by a simple operation of pushing the push button 616 and inserting the chining piece 617 with the teeth. Also, when the mouthpiece is removed from the mouth, the supply of gas for inhalation stops automatically. Therefore, the supply of the suction gas can be controlled without any complicated operation. When the mouthpiece is removed from the mouth, the expiratory tract can be automatically closed in conjunction with the mouthpiece, thereby preventing water from entering the inside through the expiratory tract.

Here, as described above, the mouthpiece 62 communicates with the exhalation passage 31 and the intake passage 32 via the exhalation tube 4 and the inhalation tube 5. The expiratory tube 4 and the inspiratory tube 5 need to be able to freely bend and have a certain degree of elasticity so as to follow the movement of the diver's head. For this purpose, a bellows hose 40 as shown in FIGS. 3 and 4 is generally used.

However, in the bellows hose 40, since the inner peripheral surface 40a has many curved folds 40b, dirt and water easily accumulate in this portion. For this reason, there is a problem that germs propagate in these parts, which is not preferable for hygiene.

To solve this problem, it is conceivable to form the inner peripheral surface flat as shown in Fig.5. However, with such a cross-sectional shape, the flexibility and elasticity required for a breathing hose cannot be secured. For this reason, it is not practical to follow the diver's head movement freely.

An object of the present invention is to provide a breathing hose for a diving respirator which does not accumulate dirt and the like on the inner peripheral surface and has required flexibility and the like. It is to be. Disclosure of the invention

The breathing hose of the diving breathing apparatus according to the present invention has, when viewed in an axial direction, a thick wall portion having a flat inner surface and protruding outward, and a thin wall curved inward with a small curvature. It has a peripheral wall having a cross-sectional shape alternately formed with a portion, and the inner peripheral surface is substantially flat.

Here, it is preferable that the breathing hose is made of ether polyurethane rubber. In addition, it is preferable to mold by an injection molding method. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a plan view showing a breathing hose according to an embodiment of the present invention in a half sectional state.

FIG. 2 is a partially enlarged cross-sectional view showing a cross section of the hose of FIG.

FIG. 3 is a partial plan view showing a bellows hose.

FIG. 4 is a partially enlarged cross-sectional view showing a portion of the hose of FIG. 3 that is circled.

FIG. 5 is a sectional view showing another example of a breathing hose.

FIG. 6 is an explanatory view showing the variable mouthpiece, (a) is an explanatory view showing a state in which the tuning piece is projected, and (b) is an explanatory view showing a state in which the chewing piece is retracted to the retracted position. .

FIG. 7 is a diagram showing the chewing piece of FIG. 6, (a) is a plan view thereof, and (b) is a side view thereof.

8 is a view showing the mass piece of FIG. 6, (a) is a half sectional plan view thereof, (b) is a half sectional side view thereof, and (c) is a front view thereof. -1 o-

FIG. 9 is an external view of a semi-closed respirator.

FIG. 10 is a diagram showing the internal structure of the device of FIG.

FIG. 11 is a schematic configuration diagram showing the mouthpiece unit of the apparatus of FIG. 9 with its upper wall removed.

Fig. 12 is a cross-sectional view of the mouthpiece unit of Fig. 11 (A) is a schematic cross-sectional view taken along line A-A, and (B) is a cross-sectional view taken along line B-B. It is a schematic sectional drawing of the part which did.

FIG. 13 is an explanatory view showing the main structure of the upper half of the mouthpiece unit of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

1 and 2 show a breathing hose formed in accordance with the present invention. The breathing hose 50 of this example is made of an ether-based urethane rubber, and is a molded product by an injection molding method.

As shown in FIG. 2 in an enlarged manner, the peripheral wall 51 of the breathing hose 50 of this example has a thick portion 52 protruding outward and a thin portion curved with a small curvature inward. 5 and 3 have a cross-sectional shape formed alternately. The inner peripheral surface 52 a of the thick portion 52 is a flat surface when cut in the direction of the hose axis 50 a, and the thin portion 53 continuous with this The inner peripheral surface 53a is also only slightly curved inward. Therefore, the inner peripheral surface 51a of the hose of this example is substantially flat.

In the breathing hose 50 of this example configured as described above, the thin-walled portion 53 that is curved with a small curvature toward the inside is formed. It has good flexibility. Also, due to the expansion and contraction of these curved portions, the hose as a whole has the necessary elasticity. Further, the inner peripheral surface 51a is substantially flat. did Therefore, when the hose of this example is used, it is possible to freely follow the movement of the diver's head, and moreover, there is no possibility that dirt or the like accumulates on the inner peripheral surface to cause germs. Further, the thick portion 52 also functions as a buckling preventing portion for preventing the hose 50 from bending and increasing the ventilation resistance.

According to experiments by the present inventors, it was confirmed that when the hose of this example was used, there was no pulling feeling or the like, and the hose was good as a breathing hose.

On the other hand, since the hose 50 of this example is made of ether urethane rubber, it is excellent in terms of tear strength and the like. In addition, the use of an ether-based material has the advantage that deterioration of physical properties such as decomposition of water is less likely to occur than that of a urethane-based material. In addition, instead of the conventional method of manufacturing a bellows hose using a baking mold or the like, a highly productive injection molding method can be adopted.

In addition, a fungicide may be added to the hose of the present example in order to prevent the growth of fungi and other germs.

On the other hand, the material of the hose 50 in this example is, instead of ether-based urethane, for example, soft polyethylene, vinyl acetate ethylene copolymer resin, soft vinyl chloride, elastomer resin, and various resins. It is also possible to use various materials such as corn rubber and rubber.

(Variable type)

Next, in the semi-closed respirator proposed by the present applicant shown in FIGS. 9 to 13, as described above, the tuning piece is manually protruded from the mouthpiece, By sandwiching the gas between the upper and lower teeth and holding it in that state, the supply of inhalation gas with a constant mass flow rate from the gas cylinder side can be started, and the expiratory tube can be kept open. Therefore, supply of gas for intake by simple operation If the mouthpiece comes out of the diver's mouth while diving, the chewing piece returns to its retracted position, and in conjunction with this, the expiratory tube is closed, so that water intrusion is automatically performed. Can be prevented.

Here, the above-mentioned mouthpiece and chewing piece are generally set in a shape and size according to the average shape and size of the gums of a Japanese person from an anatomical point of view. However, the shape of the gums varies from person to person.

Therefore, it is desirable to adopt a variable mouthpiece that can be worn properly in the mouth of each diver and that can reliably perform tuning.

This variable mouthpiece may have the following configuration. That is, the mouthpiece unit has: an expiratory tube connection portion communicating with an exhalation tube through which exhaled air flows, an inspiratory tube connection portion communicating with an inspiratory tube through which inspiratory gas flows, and an external opening communicating with the outside. A respiratory gas circulation chamber; a gas supply port for supplying a new inspiratory gas having a constant mass flow rate supplied from the respiratory gas cylinder into the respiratory gas circulation chamber; a mouse piece attached to the external opening; A check valve disposed only in the portion and permitting only fluid passage from the respiratory air flow chamber to the expiratory tube; and a fluid flow from the inspiratory tube to the respiratory air flow chamber disposed in the inspiratory tube connection portion A check valve for permitting only the opening and closing means attached to the gas supply port; an urging means for applying an elastic force for holding the opening and closing means in a closed state; an elastic force by the urging means Pile on A manual operation member capable of switching the opening / closing means to an open state; and a tuning piece that moves from a retracted position in the mouthpiece to a position protruding to the outside in conjunction with the manual operation member. can do.

Further, in the mouthpiece described above, a hinge portion which is easily bent is formed on the outer peripheral wall of the distal end portion, and the distal end portion is located closer to the distal end than this hinge portion. The tip at is deformable according to the size and shape of the wearer's gums. Furthermore, the above-mentioned tuning piece is configured so as to be integrally deformed and connected to the tip end of the mouthpiece.

Since the tip of the mouthpiece is easily bent, it is suitable for both dives larger than Japanese with average gum size, and conversely for small dives. Can be installed. In addition, at this time, the chewing piece is deformed together with the mouse piece, so that it can be securely inserted between the teeth in an appropriate state. Hereinafter, a specific structure of the variable mouthpiece will be described with reference to FIGS. This mouse piece is an example in which the present invention is applied to the mouse piece of the semi-closed type respirator shown in FIGS. 9 to 13 described above, and corresponding parts are denoted by the same reference numerals. , Their explanation is omitted.

As shown in FIGS. 6 and 8, the mouthpiece 62A of the present example is formed from an elastomer material, and has a cylindrical base end 62a having an oval cross section. It is formed from a front end portion 62b formed on the front end side of the portion. The distal end portion 62b expands toward the distal end side, and the distal end edge has a contour shape similar to the shape of a human gum. Here, a thin portion is formed at the boundary between the base end portion 62a and the distal end portion 62b. As shown in FIG. 6 (b), the tip portion 62b can be bent very easily inward and outward around this point. That is, this thin portion functions as the hinge portion 62.

On the other hand, as shown in FIGS. 6 and 7, the tuning piece 6 17 of the present example has a connecting member 6 17 b against a supporting plate 6 17 a attached to the upper end of the revolving plate 6 13. Mounted through. The tuning piece 617 is formed from urethane material and is connected to the connecting member 617 b. The distal end portion 6 1, which extends along the inner peripheral surface of the distal end portion 6 2 b of the mouthpiece 6 2, sandwiching the attached base end portion 6 17 c and the constricted portion 6 17 d formed at the distal end. 7 e. Therefore, as shown in FIG. 6 (b), the tuning piece 617 can be easily bent inward and outward around the constricted portion 617d. In addition, the tip 6 17 e has a squeezed portion 6 17 f protruded from the inner surface in the horizontal direction by the upper and lower teeth, and the squeezed portion 6 17 On the inner edge of f, there is formed a 6 17 g portion that hits the back gum.

Here, a pair of left and right connection holes 62 d is formed at the distal end 62 d of the mouthpiece 62 a having the above configuration. As shown in FIGS. 6 and 8, the connection hole 62 d is a stepped hole having a small diameter on the inside and a large diameter on the outside. On the other hand, on the side of the chewing piece 6 17, a connecting projection 6 17 h is formed from the outer surface of the tip 6 17 e. The projection 617 h is formed of a conical portion on the distal end side and a small-diameter neck portion on the proximal end side. Then, as shown in FIG. 6, the connection protrusions 617 h penetrate through the connection holes 62 d on the side of the mouthpiece 62, and protrude outward. The protrusion and the hole are engaged with each other so that the protrusion does not come out of the hole. The protrusion 617 h is thereafter cut along the outer shape of the mouthpiece 62 (see FIG. 6).

Next, in the present example, the maximum movable amount of the above-mentioned tuning piece 6 17 is set to about 5 mm. The maximum displacement should be determined from the anatomical point of view based on the average human model gum shape. In addition, the shape and size of the tip edge of the mouthpiece 62 described above are also determined based on the shape and size of the average human gum.

In the variable mass piece of the present embodiment configured as described above, the hinge It can be very easily bent inward and outward about the part 62c. Therefore, even when the shape and size of the gums are different, it is possible to bend in a state corresponding to the shape and size, and it is possible to wear it while fitting it in the mouth of the wearer.

In addition, in a state where the expiratory tract is closed and the supply of inhaled air is stopped, that is, in a state where the chewing piece 61 is retracted, as shown in FIG. As a result, the mouthpiece 62 is pulled inward, and is deformed inward around the hinge. In this state, the tip of the deformed mouthpiece is in the way, and the chewing piece 6 17 cannot be inserted. In this state, when the push button 6 16 is pushed in and the tuning piece 6 17 is pushed out, in conjunction with this, the tip of the mouthpiece 62 is also opened outward, as shown in Fig. 6 (a). In addition, it becomes possible to insert the tuning piece 6 17.

On the other hand, in this example, since the mouthpiece 62 is formed of an elastomer material, it is durable, harmless to the human body, and feels good. In addition, since the chewing piece is made of urethane material, it is hard to be damaged even if it is strongly pressed, and it has a good feel. Of course, these parts may be formed from other resins. For example, it can be formed from soft vinyl chloride resin, polyethylene resin, rubber, silicone, various kinds of resin such as elastomer.

In addition, the mouthpiece of the above configuration can be similarly applied to other types of diving respirators such as a closed respirator.

As described above, the variable mouthpiece 62A has a structure in which the distal end portion is easily bent inward and outward in conjunction with the tuning piece. Therefore, it can be worn in an appropriate state even for divers with different gum shapes and dimensions. Also, do not line up the intake In the state, the tip side of the mouthpiece is inwardly curved by the tuning piece in the retracted position, and the tip side of the tuning piece is covered, so that it is possible to set the state in which the tuning piece cannot be seen. Industrial applicability

As described above, the breathing hose of the diving breathing apparatus according to the present invention has a peripheral wall having a cross-sectional shape including a thick portion that is flat on the inside and protrudes outward, and a thin portion that curves inward with a small curvature. It has become. Therefore, the inner peripheral surface can be substantially flattened while maintaining the required flexibility and the like, and there is no dent such as a bellows hose where dirt or the like easily accumulates. Breeding can be prevented.

Claims

The scope of the claims

1. A flexible breathing hose for forming a supply path for breathing gas in a diving breathing apparatus, and the inside of the breathing hose when cut in the axial direction is seen. It has a peripheral wall with a cross-sectional shape in which a thick part protruding outward and a thin part curved with a small curvature inward are formed alternately, and the inner peripheral surface is substantially flat. A breathing hose for a dive respirator, which is characterized as being in a state.

2. The breathing hose for a dive respirator according to claim 1, wherein the breathing hose is made of ether urethane rubber.

3. The breathing hose for a dive respirator according to claim 2, wherein the hose is formed by an injection molding method.