JPH023354Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a suction pipe that is stretchable and can be used in a stable extended state when drinking beverages or the like.

[Prior art] Conventionally, there has been a telescopic suction device that can be shortened when not in use and can be stretched to a length convenient for suctioning when it is in use because it is attached to the outside surface of a beverage container or is portable, etc. pipe is known.

For example, as shown in FIG. 4, it is composed of a large-diameter pipe 11 and a small-diameter pipe 12 slidably inserted into the large-diameter pipe 11. With this configuration, when not in use, the small-diameter pipe 12 is deeply inserted into the large-diameter pipe 11 to shorten the overall length of the pipe, making it easy to store, carry, or attach to a beverage container. It's like this. When in use, the small diameter pipe 12 is stretched out from the large diameter pipe 11 to facilitate suction. Such telescopic suction pipes may be stretched too far and fall out. Therefore, the suction pipe shown in FIG. 4 has a stopper part 1 at the tip of the large diameter pipe 11.
1a, and a convex part 12a is provided on the small diameter pipe 12 to prevent the small diameter pipe 12 from slipping out from the large diameter pipe 11 when the small diameter pipe 12 is stretched. However, if you let go of your hand during use, or if there is too much of a difference between the outside diameter of the protrusion 12a and the inside diameter of the large diameter pipe 11, the pipe will fall under its own weight and the overall length of the pipe will become shorter. There are drawbacks to this.

As an improvement to the conventional telescopic suction pipe that prevents the overall length of the pipe from shortening due to falls, Utility Model Application No. 58-48482 and Utility Model Application No. 58-
The one described in Publication No. 45483 is known.

The former of these conventional improvements is shown in FIG. 5, in which a recess 11'a of an annular or other shape is provided at an appropriate position on the inner wall of a large diameter pipe 11'.
Even if the small diameter pipe 12' falls, the recess 1
1'a, and the total length of the pipe is set not to be shorter than a predetermined length, but when the fingers are released, the pipe is shortened to a predetermined length.

The latter conventional improved example has the shape shown in FIG. The tip of a pushes against the inner wall of the large diameter pipe 11'' to prevent it from falling easily. For example, the pipe will not fall due to its own weight, and the total length of the pipe will not be shortened. Therefore, the structure is such that when the pipe is stretched, it stops at any position so that the total length of the pipe can be made arbitrary and the length can be maintained.

However, in this conventional example, the force with which the enlarged portion 12''a of the small diameter pipe 12'' presses against the large diameter pipe 11'' is such that the pipe does not fall under its own weight.

It is difficult to adjust the degree of expansion of this expansion part, and if it is too small, there will be the problem mentioned above, as well as liquid leakage and air suction during suction. If you push too hard,
Rather than causing deformation in the larger diameter pipe due to the wrapper-like shape, the edge of the widened portion of the wrapper-like shape tends to deform inward into a wave shape, making it difficult to achieve the original purpose.

Japanese Patent Laid-Open No. 59-82813 discloses a suction pipe that solves the above-mentioned drawbacks and is provided with a locking part to prevent the pipe from shortening again after it has been stretched during use to make its total length longer. Publication, Utility Model 59-
It is also disclosed in Publication No. 21284. Typical of these are those with the configuration shown in Figures 7 and 8, which include a small diameter pipe with a hopper-shaped expansion part 22 that widens at the rear end, and a hopper near the front end. It consists of a large diameter pipe 23 having a shaped part 25 and a locking part 24 behind it.

This suction pipe is a combination of large and small pipes as shown in FIG. 24 prevents the small diameter pipe from returning and does not shorten the pipe.

However, in this conventional example, when the diameter of the hopper-shaped portion becomes too large when going from the state shown in FIG. 8 to the state shown in FIG. 7, or even in the state shown in FIG. As mentioned above, the rear end of this small diameter pipe deforms abnormally when passing through the stop 24 or due to the nature of the hopper shape itself as described above, and this problem has not been solved. .

[The problem that the idea attempts to solve]

In view of the above problems, the present invention is a telescopic suction pipe consisting of a large-diameter pipe and a small-diameter pipe, which is difficult to shorten after the small-diameter pipe is stretched to make the overall length longer. Another object of the present invention is to provide a suction pipe that does not cause air or liquid leakage when sucking a beverage.

[Means to solve the problem]

The suction pipe of the present invention was developed to solve the above-mentioned problems, and its gist consists of a large-diameter pipe made of thermoplastic resin and a small-diameter pipe made of thermoplastic resin inserted into the pipe. The large-diameter pipe has a narrow tip and is in close contact with the small-diameter pipe all around the circumference, and the large-diameter part near the narrowed part has a narrow tip. A locking recess that gradually extends toward the bent portion and in the direction of the central axis of the pipe, and the diameter of the inscribed circle is larger than the outer diameter of the small-diameter pipe is provided in a dot-like or annular shape, and At the rear end of the large diameter pipe, stretch the small diameter pipe in the direction of the tapered part of the large diameter pipe, and after the entire pipe has completely passed through the recess, A locking enlarged diameter portion is provided in close contact with the inner surface of the large diameter pipe to prevent further stretching by the bent tip and to make it difficult to move in the opposite direction by the locking receiving recess. In the suction pipe, the enlarged diameter portion for locking is formed in the shape of a rigid brim.

The content of the present invention will be explained in detail below.

The present invention is manufactured from conventionally known thermoplastic resins such as high-density polyethylene and polypropylene, and consists of a large-diameter pipe and a small-diameter pipe inserted into the large-diameter pipe. The inner diameter of the tip is formed close to the outer diameter of the small-diameter pipe to stabilize the position of the small-diameter pipe within the large-diameter pipe, and the large-diameter pipe has a dotted or annular shape near the narrow diameter. The concave portion extends in the circumferential direction, and the concave portion is formed to have a direction toward the narrow diameter portion and extend in the direction of the central axis of the large diameter pipe. This recess is easily formed by applying pressure under heat from the outside of a large diameter pipe.

Furthermore, if the depth of the recess, that is, the diameter of the virtual circle inscribed in the recess, is smaller than the outer diameter of the small diameter pipe, movement of the small diameter pipe will be hindered. On the other hand, the rear end of the small diameter pipe moves forward (elongates) after the entire large and small diameter pipes are stretched and the rear end of the small diameter pipe passes through the recess of the large diameter pipe.
cannot be done because it collides with the narrow diameter part of the large diameter pipe, and it seems difficult to retreat (shorten) because it collides with the front surface of the recess (locking receiving recess) of the large diameter pipe. There is a widening part for locking.

The invention of the present application is characterized by this expanding part for locking, and it has a hopper shape like the conventional one.
Rather, it is formed into a rigid flange shape that is difficult to deform.

This flange shape is a circular ring that is centered on the central axis of the small-diameter pipe and extends outward from the outer surface of the small-diameter pipe at right angles and concentrically with the pipe. The cross section of the ring can be selected from various shapes such as right angled quadrilateral, semicircle, triangle, etc.
Although not particularly limited, it must not be deformed by stress in the direction of the central axis that is applied by a large diameter pipe.

Such a shape resembling the brim of a sword can be easily formed by pressing the end of a small-diameter pipe against a heating plate while heating.

Embodiments of the present invention will be described below based on the drawings.

〔Example〕

FIG. 1 is a sectional view of the first embodiment of the suction pipe of the present invention, in which 1 is a large-diameter pipe made of thermoplastic resin that extends toward its tip (from right to left in the drawing). The pipe 1 has at least one concave portion 1a that tapers gradually toward the center axis of the pipe 1. 2
is a small-diameter pipe made of thermoplastic resin that is slidably inserted into the large-diameter pipe 1, and at one end of the small-diameter pipe 2 there is a flange-shaped convex portion that extends outward from the pipe. 2a is formed. As shown in the figure, the tip of the large-diameter pipe 1 is smaller in diameter than the rest, and the tip of the large-diameter pipe 1 is smaller in diameter than the other pipes.
It is structured in such a way that it cannot escape.

In the first embodiment having such a structure, during storage, etc., the small diameter pipe 2 is deeply inserted into the large diameter pipe 1, as shown by the chain line in FIG. The overall length of the pipe is becoming shorter. When in use, the smaller diameter pipe 2 is pulled out from the larger diameter pipe 1 to lengthen the entire length of the pipe.

If you try to stretch the small diameter pipe 2 to its full extent, when the brim-shaped convex part 2a of the small diameter pipe 2 reaches the concave part 1a of the large diameter pipe 1, the convex part 2a
has rigidity and hardly deforms, but the concave part of the large diameter pipe is the flexible wall of the pipe itself and is oriented diagonally, so the convex part 2a of the small diameter pipe 2 is flexible. It moves so as to open the concave portion 1a, and comes to the position shown by the solid line. At this point, the tip of the large diameter pipe 1 becomes tapered, so stop.
In other words, the entire length of the pipe has become the longest. It is used for suction in this state.

During use, the small diameter pipe 1 moves from the left side to the right side in Figure 1 due to its own weight or due to the application of force (in reality, it is used vertically, so the large diameter pipe or small diameter pipe moves vertically). ) If you try to move, the tip convex part 2 of the small diameter pipe 2
a is prevented from moving by the lock receiving recess 1a of the large diameter pipe 1. Therefore, the pipe does not shorten after it reaches a length suitable for use.

In this way, in the pipe of this embodiment, when a small diameter pipe moves in one direction (the direction in which the length of the pipe increases) in the flexible tapered recess, the recess deforms and moves. However, if the pipe reaches its longest state and then attempts to move in the opposite direction (in the direction in which the length of the pipe becomes smaller), the concave portion is difficult to deform, so it is difficult to move as a result. However, since the concave portion is considerably more flexible than the convex portion of a small-diameter pipe, it does not return to its original shape at all, so it can be shortened when not in use.

FIG. 2 shows a modification of the first embodiment, in which the shape of the tapered convex portion is different.

FIG. 3 is a sectional view of another second embodiment of the suction pipe of the present invention. This embodiment is an example in which the recess is a flexible rod-shaped member. In other words, as shown in the figure, one or more rod-shaped flexible recesses 1'a are provided near the tip of a large-diameter pipe 1' and are oriented toward the center axis of the pipe toward the tip (leftward in the drawing). It is something that That is, it is a rod-shaped recess extending diagonally inward from the wall surface of the large-diameter pipe 1', and has a flexible recess whose angles θ and θ' satisfy the relationship θ<90° and θ′>90°, respectively.

Also in this embodiment, when the small-diameter pipe moves from right to left, the collar of the small-diameter pipe does not deform, and only the concave portion of the large-diameter pipe can bend and move. Moreover, after the small-diameter pipe has moved the most and the entire length of the pipe has become the longest, even if the small-diameter pipe tries to move in the opposite direction, it will not only be blocked by the locking recess, but also The flange is in close contact with the inner surface of the large diameter pipe without being deformed.

In other words, since the flange is not deformed, there is always a portion in close contact between the large diameter pipe and the small diameter pipe, and suction performance is maintained.

Note that the above-mentioned recess is not limited to an annular shape, and at least one dot-shaped recess may be provided on the inner wall of the large-diameter pipe.
The above-mentioned annular recess may be used, but in that case, the bending will be reduced and a larger force will be required when stretching a small diameter pipe.

[Effect of idea]

In the telescopic suction pipe of the present invention, the large diameter pipe is provided with, for example, a tapered recess, but the small diameter pipe end is formed into a rigid brim shape, so that when the small diameter pipe is expanded or contracted, the small diameter pipe is The product does not deform and remains in airtight and liquid-tight contact with the inner surface of the large-diameter pipe all around even after passing through the recess of the large-diameter pipe, so there are no problems when sucking drinks, etc. .

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a first embodiment of the suction pipe of the present invention, Fig. 2 is a cross-sectional view of a modification of the first embodiment, and Fig. 3 is a cross-sectional view of a second embodiment of the suction pipe of the present invention. The cross-sectional view of the embodiment and FIGS. 4 to 6 are all cross-sectional views of a conventional suction pipe, and FIGS. 7 and 8 are cross-sectional views and side views of other conventional examples. 1... Large diameter pipe, 1a... Concave portion, 2... Small diameter pipe, 2a... Flange-shaped protrusion.

Claims (1)

[Scope of utility model registration request] A telescopic suction pipe consisting of a large-diameter pipe made of thermoplastic resin and a small-diameter pipe made of thermoplastic resin inserted into the large-diameter pipe, and the large-diameter pipe has a thin tip. , is in close contact with the small diameter pipe over the entire circumference, and has a large diameter part near the narrowed part that gradually extends toward the narrowed part and in the direction of the center axis of the pipe, and has an inscribed circle. A locking recess having a diameter larger than the outer diameter of the small diameter pipe is provided in a dotted or annular shape, and the small diameter pipe is connected to the large diameter pipe at the rear end of the large diameter pipe. After the pipe is stretched in the direction of the tapered portion and the entire pipe passes completely through the recess, further stretching is prevented by the tapered tip of the large diameter pipe, and the locking receiving recess prevents further stretching. In the suction pipe, the enlarged diameter part for locking is provided in close contact with the inner surface of the large diameter pipe to make it difficult to move in the opposite direction, and the enlarged diameter part for locking has a rigid flange shape. A suction pipe characterized by being formed.