JPH0156762B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to an improvement in a sliding telescoping straw consisting of an inner straw and an outer straw.

(Prior Art) It is desirable that a straw attached to a beverage container be longer than the depth of the beverage container so that the straw does not fall into the container during drinking. However, since a straw of a length that is not inconvenient for drinking is longer than the beverage container itself, it is difficult to attach it to the beverage container.
Therefore, it becomes necessary to attach a retractable straw that is in a contracted state when attached and expands when drinking. This retractable straw has a double structure consisting of an inner straw and an outer straw, and the diameter of the end of the outer straw is simply reduced and the diameter of the end of the inner straw is expanded at the joint. This has previously caused the following problems.

In other words, a retractable straw is extended and inserted into a beverage container to drink.When extending the straw, if the inner straw is extended in the normal extension direction, that is, toward the tip, it can be handled correctly. However, if the inner straw were to be stretched in the opposite direction, the inner straw would slip out of the outer straw.Furthermore, the conventional straws had no means for reliably maintaining the extended state. That is, since there was no means to prevent the straw from easily contracting again, there was a risk that the user would push the straw and contract it while drinking, causing the straw to fall into the container.

In the past, in view of the above points, the inner straw was designed to prevent the inner straw from easily slipping out from the outer straw, and to maintain the extended state without easily contracting once the straw has been extended. The proximal end of the straw is expanded in diameter to form an enlarged diameter part, the tip of the outer straw is reduced in diameter to form a reduced diameter part,
When the inner and outer straws are stretched, the proximal end of the inner straw and the tip of the outer straw are engaged, and the inner straw is pulled into a position near the tip of the outer straw, for example, at the boundary between the outer straw body and the reduced diameter portion. A retractable straw has been developed and is well known, in which an inward stopper is formed to prevent this, and a diameter-reduced portion is also formed at the proximal end of an outer straw to prevent the inner straw from slipping out.

(Problems to be Solved by the Invention) This known telescopic straw is very good in that the inner straw does not come out and the inner straw does not enter the outer straw and contract in the extended state. Since the stopper is formed as a simple inward V-shaped protrusion, when the inner straw is pulled out from the outer straw and extended, the enlarged diameter portion of the proximal end of the inner straw is difficult to overcome the stopper. In some cases, the inner straw may be used without smooth engagement to prevent retraction, or the stopper at the proximal end of the inner straw may not be able to move over smoothly. There was a problem in that the inner straw was pulled so strongly that it even exceeded the reduced diameter portion at the tip of the outer straw. Furthermore, when the enlarged diameter portion of the proximal end of the inner straw passes over the stopper by strongly pulling the inner straw, the pointed portion at the inner end of the stopper breaks and breaks due to the inward V-shape of the stopper.
There was also the problem that air leaked from the torn part, making it impractical.

Furthermore, in conventionally known telescopic straws, the surface contact between the inner surface of the tapered part of the outer straw and the outer surface of the inner straw, or the inclination angle of the reduced diameter part at the tip of the outer straw,
The angle of inclination of the enlarged diameter part at the rear end of the inner straw is made to match the angle of inclination, and air leakage, that is, airtightness is ensured by surface contact between these inclined surfaces when the straw is extended. In the case of face-to-face contact between surfaces, it is extremely difficult to maintain that contact reliably, and it must be produced without any dimensional errors during production. There was a problem with the lack of sex.

In view of the above-mentioned problems, this invention prevents the inner straw from easily slipping out from the outer straw, and also prevents the inner straw from easily contracting once it has been extended. The enlarged diameter part of the proximal end can smoothly pass over the inward stopper of the outer straw, and even if there are some errors in dimensions, sufficient airtightness is ensured, and it is sufficiently practical even in mass production. The purpose of this invention is to provide a new retractable straw that can be used for.

(Means for Solving the Problems) For this purpose, in this invention, the base end of the inner straw is expanded in diameter to form the enlarged diameter part, the tip of the outer straw is reduced in diameter to form the reduced diameter part, and the tip of the outer straw is further reduced in diameter to form the reduced diameter part. Has a tapered part,
When the inner and outer straws are extended, the enlarged diameter part on the proximal end of the inner straw and the reduced diameter part at the tip of the outer straw are engaged, and an inward stopper is located near the tip of the outer straw to prevent the inner straw from being drawn in. It is a retractable straw formed by
The inward stopper is formed across the reduced diameter part of the outer straw and the outer straw body, and the innermost point O of this inward stopper is formed into a curved surface, and the reduced diameter part on the proximal end of the outer straw inner diameter A,
Inner diameter B of the outer straw main body, inner diameter C at the innermost point O of the inward stopper, inner diameter D at the starting point P at the position of the reduced diameter part of the inward stopper, inner diameter E of the tip of the tapered part, and inner diameter of the tip of the enlarged diameter part of the inner straw. The mutual relationship between the outer diameter F and the outer diameter G of the inner straw body, and the mutual relationship between the inclination angle θ1 of the reduced diameter portion of the outer straw and the inclination angle θ2 of the enlarged diameter portion of the inner straw, are “B≧
F>D>E≧G,” “F>C≧G,” “F>A” and “θ1>θ2,” and the outer straw is made of a softer material than the inner straw. Furthermore, the inward stopper is characterized in that the distal end thereof is steeply sloped, the proximal end thereof is sloped gently, and the inward stopper is formed in a vertically elongated shape.

(Example) The details of the present invention will be explained below with reference to preferred embodiments shown in the drawings.

As shown, the retractable straw is the inner straw 1.
and an outer straw 3. The tip of the inner straw 1 is cut off diagonally to form a beveled end 5, which allows the straw to be inserted into a beverage container;
The work of inserting the inner straw 1 into the outer straw 3 and assembling the telescopic straw is made easy. And the base end of the inner straw 1,
That is, the end portion on the side where the outer straw 3 is connected is expanded in diameter to form the expanded diameter portion 2 . Expanded diameter part 2 shown in the drawing
Although the example shown in FIG. It may also have a shape that extends forward as a diameter.

The end of the outer straw 3 on the joint side with the inner straw 1 is reduced in diameter to form a reduced diameter part 4, and the end of the reduced diameter part 4 is connected to the inner straw 1.
The tapered portion 6 is formed by extending an appropriate length in the direction of extension. The shape of the tapered portion 6 may be cylindrical with the same diameter, may be slightly tapered to be slightly tapered, or may be a combination thereof. The inner diameter of this tapered portion 6 is set to such an extent that sliding of the inner straw 1 is not hindered.
It is made to approximately match the outer diameter of. Therefore, due to the engagement between the enlarged diameter part 2 of the inner straw 1 and the reduced diameter part 4 of the outer straw 3, the inner straw 1 does not fall off from the outer straw 3 when the straw is extended, and the inner straw 1 is prevented from falling off the outer straw 3. Tapered part 6 of 3
These inner and outer straws 1 and 3
does not bend at the joint.

An inward stopper 7 for preventing the inner straw 1 in an extended state from being pulled in is formed near the tip of the outer straw and at a position spanning the reduced diameter portion 4 and the outer straw body 3. That is, the starting end point P of the inward stopper 7 is located at an intermediate position of the reduced diameter portion 4, and the terminal end point Q of the inward stopper 7 is located at an appropriate position on the outer straw body 3. Further, in the present invention, the innermost end point 0 of this inward stopper 7 is not formed into a sharp shape but is formed as a curved surface. Further, a reduced diameter portion 8 is formed at the base end of the outer straw 3 to prevent the inner straw once inserted from coming out unnecessarily.

The present invention is also characterized in that the slope 9 on the proximal side forming the inward stopper 7 of the outer straw 3 is a gentle slope, and the slope 10 on the distal side is steep. In the embodiment shown in FIG. 4, the gentle slope 9 is formed into a gentle curved shape.
In the embodiment shown in the figure, the gentle slope 9 is a two-step slope, and each slope is linear.

In the illustrated embodiment, the inward stopper 7
is formed by three inward protrusions, but the number may be less than or greater than three, and the shape of the inward stopper may be a ring-shaped stopper along the peripheral wall of the outer straw.

Further, in this invention, the dimensions and angles of each part of the inner and outer straws are as follows. In other words, the inner diameter A of the reduced diameter portion on the proximal end side of the outer straw, and the outer straw main body portion 3.
Inner diameter B of the inward stopper, inner diameter C of the innermost end O point, inner diameter D of the starting end P point of the inward stopper diameter reduction part 4 position, inner diameter E of the tip of the tapered part 6, outside of the inner straw widened diameter part 2 tip. The mutual relationship between the diameter F and the outer diameter G of the inner straw body 1, and the mutual relationship between the inclination angle θ1 of the reduced diameter part 4 of the outer straw 3 and the inclination angle θ2 of the enlarged diameter part 2 of the inner straw 1, “B≧
"F>D>E≧G", "F>C≧G", "F>A", and "θ1>θ2". Among these, the feature of the present invention is that F>D and θ1＞
θ2. Coupled with this dimensional feature,
Another feature is that the outer straw 3 is made of a softer material than the inner straw 1.

The telescopic straw of the present invention configured as described above is in a state in which the tip of the inner straw 1 is slightly pulled out from the tip of the outer straw 3 (first and second straws).
(as shown). Therefore, when the tip of the inner straw 1 that has been pulled out is pinched and pulled out, the enlarged diameter portion 2 of the proximal end of the inner straw 1 passes through the inward stopper 7 near the tip of the outer straw, and the diameter of the tip of the outer straw is reduced. and is in an extended state. Then, in an attempt to retract the inner straw 1 and contract it,
Even if an attempt is made to push it in with a normal weak force, the enlarged diameter portion 2 of the inner straw 1 is locked by the inward stopper of the outer straw 3, and the inner straw is prevented from being pulled in. Therefore, the extended state of the straw is maintained,
There is no fear that this will shrink unnecessarily.

In particular, in the present invention, since the O point position at the innermost end of the inward stopper 7 is formed by a curved surface, when the enlarged diameter portion 2 of the inner straw 1 passes,
The passage can be carried out smoothly, and there is no risk of damaging this innermost position.

In addition, the dimensional relationship between the outer diameter F at the tip of the inner straw's enlarged diameter part 2 and the inner diameter D at the starting end P at the position of the diameter reduced part 4 of the inward stopper is F>D, and the inclination angle of the outer straw's reduced diameter part 4 is Since the mutual relationship between θ1 and the inclination angle θ2 of the enlarged diameter portion 2 of the inner straw is θ1>θ2, and the outer straw is made of a softer material than the inner straw, the inner and outer straws are pulled out, and the enlarged diameter portion 2 of the inner straw is pulled out. When engaged with the reduced diameter part 4 of the straw and prevented from returning by the inward stopper 7, the enlarged diameter part 2 of the inner straw pushes the reduced diameter part 4 of the outer straw outward, as shown in FIG. In particular, the pressure is expanded in the direction (from the dotted line position to the solid line position in the figure) to ensure pressure contact between the most extreme edge of the enlarged diameter portion 2 and the inner circumferential edge at the above-mentioned point P position, and to reliably maintain an airtight state.

Further, in the present invention, the inward stopper 7
Since the proximal end slope 9 that formed the slope is a gentle slope, and the distal side slope 10 is a steep slope, the inner straw is extended so that the enlarged diameter portion 2 at the base end becomes the inward stopper 7.
When getting over the straw, the straw gets over smoothly by the gentle slope, and once it gets over, it is locked by the steep slope 10 on the tip side and the extended state is surely maintained without fear of the inner straw being easily drawn in. You can also do it.

(Effects of the Invention) As described above, according to the telescopic straw of the present invention, at the engagement portion between the inner straw and the outer straw, the enlarged diameter portion of the inner straw expands the starting edge of the reduced diameter portion of the outer straw outward. It was possible to reliably maintain a close contact state by pressing, and to ensure an airtight state. By making the inner end of the inward facing stopper a curved surface, tearing and damage in this part are minimized,
Air leakage from this part can also be well prevented. In particular, the present invention has the great effect that, due to its dimensional characteristics, it can sufficiently ensure airtightness even if there are some errors that occur during production, making it suitable for mass production.

[Brief explanation of drawings]

The drawings show a preferred embodiment of the present invention; FIG. 1 is a front view of the contracted state, FIG. 2 is an enlarged longitudinal sectional view with a portion omitted, FIG. 3 is an enlarged sectional view of the inner straw, and FIG. is an enlarged cross-sectional view of the main part of the outer straw, taken along the upper line in FIG.
FIG. 6 is an enlarged sectional view of a main part of another embodiment of the outer straw, and FIG. 7 is an enlarged sectional view illustrating the engaged state of the inner straw and the outer straw. 1... Inner straw, 2... Expanded diameter part, 3... Outer straw, 4... Reduced diameter part, 7... Inward stopper, 8... Reduced diameter part, 9... Gentle slope on base end side, 10
... Steep slope on the tip side, A ... Inner diameter of the reduced diameter part on the proximal end of the outer straw, B ... Inner diameter of the outer straw main body, C ... Inner diameter of the innermost end of the inward stopper O point,
D...Inner diameter of starting point P at position 4 of reduced diameter part of inward stopper, E...Inner diameter of tip of tapered part 6, F
...Outer diameter of the tip of the enlarged diameter part 2 of the inner straw, G...Outer diameter of the inner straw body 1, θ1...Inclination angle of the reduced diameter part 4 of the outer straw, θ2...Inclination of the enlarged diameter part 2 of the inner straw corner.

Claims (1)

[Claims] 1. The base end of the inner straw 1 is expanded in diameter to form an enlarged diameter portion 2, the tip of the outer straw 3 is reduced in diameter to form a reduced diameter portion 4, and the tip further has a tapered portion 6. When the inner and outer straws 1 and 3 are stretched, the enlarged diameter portion 2 on the proximal end side of the inner straw and the reduced diameter portion 4 at the tip of the outer straw are engaged, and the inner straw 1 is arranged near the tip of the outer straw. A retractable straw formed with an inward stopper 7 for preventing retraction, the inward stopper 7 being formed across the reduced diameter portion 4 of the outer straw and the outer straw body 3,
The innermost point O of this inward stopper 7 is formed into a curved surface, and the inner diameter A of the outer straw proximal side reduced diameter part, the inner diameter B of the outer straw body 3, and the innermost point O of the inward stopper 7. , the inner diameter D of the starting end P at the reduced diameter part 4 position of the inward stopper, the inner diameter E of the tip of the tapered part 6, the outer diameter F of the tip of the inner straw enlarged diameter part 2, and the outer diameter G of the inner straw body 1. and the mutual relationship between the inclination angle θ1 of the reduced diameter portion 4 of the outer straw 3 and the inclination angle θ2 of the enlarged diameter portion 2 of the inner straw 1 are “B≧F>D>E≧G”, “F>C≧G”, “F
>A" and "θ1 >θ2", and the outer straw is made of a softer material than the inner straw. 2 The base end of the inner straw 1 is enlarged in diameter to form an enlarged diameter part 2, the tip of the outer straw 3 is reduced in diameter to form a reduced diameter part 4, and the tip further has a tapered part 6, and these inner and outer straws 1, 3, the proximal enlarged diameter portion 2 of the inner straw and the reduced diameter portion 4 at the tip of the outer straw engage with each other, and the inner straw 1 is placed near the tip of the outer straw to prevent the inner straw 1 from being drawn in. A telescopic straw formed with a stopper 7, wherein the inward stopper 7 is formed across the reduced diameter portion 4 of the outer straw and the outer straw body 3,
The innermost point O of this inward stopper 7 is formed into a curved surface, the tip side of this inward stopper 7 has a steep slope 10, the base end side has a gentle slope 9, and the inward stopper 7 is vertically long. The inner diameter A of the reduced diameter part on the proximal end of the outer straw, the inner diameter B of the outer straw body 3, the inner diameter C of the innermost point O of the inward stopper, and the 4th position of the reduced diameter part of the inward stopper. The mutual relationship among the inner diameter D at the starting point P, the inner diameter E at the tip of the tapered part 6, the outer diameter F at the tip of the inner straw enlarged diameter part 2, and the outer diameter G of the inner straw body 1, and the reduced diameter part 4 of the outer straw 3 The mutual relationship between the inclination angle θ1 of
>A" and "θ1 >θ2", and the outer straw is made of a softer material than the inner straw.