JPH07215284A - Respiration hose of respiration device for diving - Google Patents

Abstract

PURPOSE:To propose a respiration hose of respiration device which has a flat inner peripheral surface having no recess liable to stay a dirt and the like, while maintaining necessary properties such as a flexibility. CONSTITUTION:A respiration hose 10 of a respiration device for diving has a peripheral wall 11 in which a thick wall part 12 where the inner peripheral surface is flat and projects to the outer side; and a thin wall part 13 curved to the inner side in a small curvature; are formed alternatively, in the observation when the hose 10 is cut in the axial direction. Since the inner peripheral surface is actually a flat surface, dart and the like staying in recesses of a bellows hose do not increase such various germs, etc., that a sanitary trouble is caused. The necessary properties for the respiration hose such as flexibility and the like are obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in flexible breathing hoses used in diving breathing apparatus.

[0002]

2. Description of the Related Art In a breathing apparatus for diving, in order to exchange breathing gas between the body of the apparatus in which the breathing gas cylinder, etc. carried by the diver, and the mouthpiece held by the diver. , These are connected with a breathing hose.

This breathing hose is required to be able to flex freely so as to follow the movement of the head of the diving person and to have a certain degree of elasticity.
For this purpose, a bellows hose 1 as shown in FIGS. 3 and 4 is generally used.

[0004]

[Problems to be Solved by the Invention] However, the bellows hose 1
In the above, since there are a large number of curved folds 1b on the inner peripheral surface 1a, dirt and water easily accumulate in this portion. Therefore, there is a problem that various bacteria are propagated in these parts and are not preferable in terms of hygiene.

In order to solve this problem, it is conceivable to form the inner peripheral surface in a flat state as shown in FIG. However, such a cross-sectional shape cannot ensure the flexibility and stretchability required for a breathing hose.
For this reason, it is not practical to follow the movement of the head of the diver.

An object of the present invention is to propose a breathing hose for a dive breathing apparatus which does not collect dirt on its inner peripheral surface and which has required flexibility and the like.

[0007]

The breathing hose of the diving breathing apparatus of the present invention has a thick portion which is a flat surface on the inside and protrudes to the outside when viewed in the axial direction when cut. It has a peripheral wall having a cross-sectional shape in which thin portions curved with a small curvature toward each other are alternately formed, and the inner peripheral surface is characterized by being substantially flat.

Here, it is preferable that the breathing hose is made of ether type urethane rubber. Moreover, it is preferable to mold by an injection molding method.

[0009]

1 and 2, there is shown a breathing hose constructed in accordance with the present invention. The breathing hose 10 of this example is made of an ether type urethane rubber and is a molded product manufactured by an injection molding method.

As shown in the enlarged view of FIG. 2, the peripheral wall 11 of the breathing hose 10 of this embodiment includes a thick portion 12 protruding outward and a thin portion 13 curved inward with a small curvature. Has a cross-sectional shape formed by turns. The inner peripheral surface 12a of the thick portion 12 is a flat surface when viewed in the direction of the hose axis 10a, and the inner peripheral surface 13a of the thin portion 13 continuous to this is also slightly It is only curved inward. Therefore, the inner peripheral surface 11a of the hose of this example is substantially flat.

The breathing hose 1 of the present example thus constructed
0 is a thin portion 1 that is curved inward with a small curvature
3 is formed, the bending of these parts causes
The hose as a whole has good flexibility. Further, due to the expansion and contraction of these curved portions, the hose as a whole also has the necessary elasticity. Further, the inner peripheral surface 11a is substantially flat. Therefore, when the hose of this example is used, it is possible to freely follow the movement of the head of the diving person, and further, dirt and the like do not accumulate on the inner peripheral surface to cause various bacteria. According to experiments conducted by the present inventors, it was confirmed that when the hose of this example was used, there was no feeling of pulling, and the hose for breathing was good.

On the other hand, since the hose 10 of this example is made of ether urethane rubber, it is excellent in tear strength and the like. Further, instead of the conventional method such as a baking mold for manufacturing the bellows hose, an injection molding method having high productivity can be adopted.

In the hose of this example, an antifungal agent may be added in order to prevent the growth of bacteria such as mold.

[0014]

As described above, the breathing hose of the diving breathing apparatus of the present invention is composed of a thick portion having a flat inner side and protruding outward and a thin portion curved inward with a small curvature. It is a peripheral wall having a cross-sectional shape. Therefore, the inner peripheral surface can be made substantially flat while maintaining the required flexibility, etc., and there is no dent such as a bellows hose that easily accumulates dirt, etc., preventing the growth of mold etc. it can.

[Brief description of drawings]

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

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

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

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

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

[Explanation of Codes] 10 ... Breathing hose 10a ... Hose axis 11 ... Peripheral wall 11a ... Inner peripheral surface 12 ... Thick wall portion 12a ... Inner peripheral surface of thick wall portion 13. ..Thin portion 13a ... Inner surface of thin portion

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[Procedure amendment]

[Submission date] August 19, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

Claims (3)

[Claims] 1. A flexible breathing hose for forming a supply path for a breathing gas in a diving breathing apparatus, the breathing hose being cut in the axial direction when viewed. It has a peripheral wall with a cross-sectional shape in which a thick part that is flat on the inside and protrudes toward the outside and a thin part that curves toward the inside with a small curvature are alternately formed, and the inner peripheral surface is substantially A breathing hose for a diving breathing apparatus, which is in a flat state. 2. A breathing hose for a diving breathing apparatus according to claim 1, wherein the breathing hose is made of ether urethane rubber. 3. The breathing hose of a breathing apparatus for diving according to claim 2, which is molded by an injection molding method.