JPH0930492A - Snorkel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a communicating pipe member from pivoting about and falling off from a base pipe member in a snorkel. SOLUTION: In a snorkel having a fitted part 7 of a communicating pipe member 2 fitted in a fit part 5 of a base pipe member 1, the fit part 5 is formed inside the pipe wall with a radial through hole 10 and peripheral groove 11. A projection 15 extending radially outward from the pipe wall of the fit part 5 and a bulging part 16 extending circumferentially of the pipe wall are fitted in the through hole 10 and groove 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to underwater sports such as swimming and scuba diving, and also relates to a snorkel for breathing under the water during work while diving.

[0002]

2. Description of the Related Art Conventionally, a snorkel in which a communication pipe member is connected to a base pipe member including a mouthpiece portion and a curved pipe portion is well known. Further, a technique is also known in which one end portion of a communicating pipe member formed of a hard synthetic resin is press-fitted inside one end portion of a curved pipe portion formed of a soft synthetic resin having elasticity to connect the both pipe members. Or well known. Such a technique is disclosed in, for example, Japanese Utility Model Publication No. 49-33039.

[0003]

When the snorkel is used, an upper portion of the communicating pipe member which is located above the water surface is formed by a straight pipe which constitutes a lower portion of the pipe member and extends straight upward. When the vent is formed upwards like the mouthpiece opening at the tip, or when the upper part bends gently with respect to the straight lower part,
The vent may be formed laterally. In the latter case, by making the vent sideways, it is possible to effectively prevent water from entering from a specific direction. However, if the communication pipe member is simply press-fitted to the base pipe member, both pipe members may move relatively, and the ventilation port may be displaced from a desired direction. In addition, for a person who is unfamiliar with the use of the snorkel, once the communication pipe member is removed, it may be difficult to determine in which direction the ventilation port should be directed when it is next fitted.

In view of the above, the present invention has an object to provide a positioning means for connecting the base pipe member and the communication pipe member to each other so that the direction of the vent hole can always be kept constant. .

[0005]

In order to solve the above-mentioned problems, the present invention has a base in which a mouthpiece portion is formed at one end of a bending tube portion and a fitting portion is formed at an opposite end portion of the one end portion. It is premised on a snorkel consisting of a pipe member and a communicating pipe member in which a vent is formed at one end and a fitted portion formed at an end facing the one end is watertightly fitted to the fitting portion. , A required number of engaging projections that extend in the radial direction toward the other pipe wall are formed on the pipe wall of either the fitting portion or the fitted portion, and the projection is formed on the other pipe wall. It is a feature of the present invention that an engaged recessed portion corresponding to the radial direction is formed and the projection is fitted in the recessed portion.

In a preferred embodiment of the invention,
The projection is a projection having a circular cross section formed on the outside of the pipe wall of the fitted portion, and the recess is formed of a blind hole formed inside the pipe wall of the fitting portion and a through hole extending to the outside of the pipe wall. In any one of the above, the fitted portion is inside the fitting portion.

In another preferred embodiment of the present invention, a protrusion extending in the circumferential direction is formed on the outside of the pipe wall of the fitted portion while the inside of the pipe wall of the fitting portion is formed. A groove extending in the circumferential direction is formed, and the protrusion is fitted in the groove.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the snorkel according to the present invention will be described below with reference to the accompanying drawings.

The snorkel shown in FIG. 1 comprises a base pipe member 1 formed of a soft synthetic resin having elasticity and a communicating pipe member 2 formed of a hard synthetic resin. Base pipe member 1
Includes a curved tube portion 3, a mouthpiece portion 4 formed at one end portion of the tube portion 3, and a fitting portion 5 formed at the other end portion. The mouthpiece portion 4 has an upward opening 4A. The communicating pipe member 2 has a fitted portion 7 at the lower end thereof which is press-fitted into the fitting portion 5 from the inside, an upper portion 8 located above the water surface S when the snorkel is used, and both portions 7,
It is composed of a straight intermediate portion 9 interposed between 8. The upper portion 8 is gently bent with respect to the intermediate portion 9, and a ventilation port 8A is opened obliquely upward at the tip thereof.

In a main portion of the base pipe member 1 and the communicating pipe member 2 in the unfitted state shown in FIG. 2, the fitting portion 5 of the base pipe member 1 has a pair of transparent members penetrating the pipe wall in the radial direction. Hole 10 and
There is a groove 11 that is located inside the tube wall and that extends in the circumferential direction and that is located below the through hole 10. The line connecting the centers of the pair of through holes 10 coincides with the diameter of the fitting portion 5. The fitted portion 7 of the communication pipe member 2 has a pair of columnar projections 15 that extend in the radial direction outside the pipe wall, and has a flange-shaped projecting portion 16 that extends in the circumferential direction at the lower end portion. A pair of protrusions 1
The line connecting the centers of 5 coincides with the diameter of the fitted portion 7.

In the base pipe member 1 and the communication pipe member 2, the fitted portion 7 has an outer diameter dimension capable of being press-fitted inside the fitting portion 5. The fitting portion 5 is elastically deformed during press fitting, and after press fitting, the inner surface of the fitting portion 5 and the outer surface of the fitted portion 7 are brought into close contact with each other in a watertight state. Further, the projection 15 and the projecting portion 16 of the fitted portion 7 are fitted into the through hole 10 and the groove 11 of the fitting portion 5, respectively. By fitting into the through hole 10 and the groove 11, the communicating pipe member 2 is always accommodated in the fitting portion 5 for a required length, is securely fixed to the base pipe member 1 and can rotate in the circumferential direction, It does not come off. Therefore, in this snorkel, the relative positional relationship between the mouthpiece portion 4 and the vent hole 8A can be always kept constant.

In the snorkel according to the present invention, the number of the protrusions 15 of the fitted portion 7 may be one, but preferably two.
Make one or more. When the number of the protrusions 15 is two as in the illustrated example, a round bar having a required diameter is passed to the fitted part 7 so as to cross the diameter, and both ends of the round bar extend from the pipe wall. Can also be used as the protrusion 15. In the fitting part 5,
In addition to forming the through hole 10 corresponding to the protrusion 15, a blind hole may be formed inside the pipe wall instead of the through hole 10.
The overhanging portion 16 of the fitted portion 7 has the protrusion 1 as in the illustrated example.
It is sufficient if it is below 5, but it can also be formed in a plurality of lines or can be formed above and below the protrusions 15, respectively. In addition, the protrusion 15 and the overhanging portion 1 are formed on the inner surface of the fitting portion 5.
6 may be formed, and the through hole 10 and the groove 11 may be formed on the outer side surface of the fitted portion 7. In that case, it is preferable that the fitting portion 5 is made of hard synthetic resin and the fitted portion 7 is made of soft synthetic resin. The present invention can also be carried out such that the fitted portion 7 fits outside the fitting portion 5.

[0013]

In the snorkel according to the present invention, when the base pipe member and the communicating pipe member are connected, the projection extending radially outward from the pipe wall of the one pipe member is the pipe of the other pipe member. Since the communication pipe member is fitted in the through hole or blind hole formed in the wall, the communication pipe member does not rotate with respect to the base pipe member, and the direction of the vent hole is constant. In the aspect in which the circumferential overhanging portion formed on one pipe member is fitted into the circumferential groove formed on the other pipe member, the communication pipe member can be reliably prevented from being pulled out from the base pipe member.

[Brief description of drawings]

FIG. 1 is a perspective view of a snorkel.

FIG. 2 is a perspective view of essential parts of a base pipe member and a communication pipe member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base pipe member 2 Communication pipe member 3 Curved pipe part 4 Mouthpiece part 5 Fitting part 7 Fitted part 10 Through hole 15 Protrusion 16 Overhanging part

Claims (3)

[Claims] 1. A base tube member having a mouthpiece portion formed at one end portion of a curved tube portion, and a fitting portion formed at an end portion opposite to the one end portion, and a vent hole formed at the one end portion. Is a snorkel comprising a fitting pipe formed at an end facing the fitting part and a communicating pipe member fitting in a watertight manner in the fitting part, wherein either one of the fitting part and the fitted part is a snorkel. A required number of engaging projections that extend in the radial direction toward the other tube wall are formed on the tube wall, and an engaged recessed portion that corresponds to the projection and that is recessed in the radial direction is formed on the other tube wall. The snorkel, wherein the protrusion is fitted in the recess. 2. The projection is a projection having a circular cross section formed on the outside of the pipe wall of the fitting portion, and the recess is formed on the blind hole and the outside of the pipe wall formed inside the pipe wall of the fitting portion. The snorkel according to claim 1, wherein the fitted portion is inside the fitting portion in any of the through holes extending to the fitting portion. 3. A ridge extending in the circumferential direction is formed on the outside of the pipe wall of the fitted portion, and a ridge groove extending in the circumferential direction is formed on the inside of the pipe wall of the fitting portion, The snorkel according to claim 2, wherein the protrusion is fitted in the groove.