JPH0515876U - Drinking straws - Google Patents

Abstract

(57) [Summary] [Purpose] When using a straw for beverages with the inner tube inserted into the outer tube so that it can be pulled out, the overlap length of the inner and outer tubes is shortened as much as possible to reduce the actual utilization rate of the straw. Increase. [Structure] In a drinking straw in which a plastic inner tube is inserted into a plastic outer tube so as to be able to be drawn out, an inner collar 2 is provided at the front end of the outer tube 1, and a collar is provided at the rear end of the inner tube 3. While forming the receiving groove 4, the outer diameter d2 of the inner pipe 3 is set slightly smaller than the inner diameter d1 of the outer pipe 1, and the outer diameter d3 of the collar receiving groove 4 of the inner pipe 3 and the inner diameter of the outer pipe 1 Inner diameter d4
And are set to be substantially equal to each other, the pull-out amount of the inner pipe 3 drawn out from the rear opening edge 1a through the inner flange 2 into the outer pipe 1 is determined by the relationship between the flange receiving groove 4 of the inner pipe 3 and the inner flange 2. In addition, the inner tube 3 was prevented from retrograde to the outer tube 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a plastic beverage straw in which an inner tube is inserted into an outer tube and used for withdrawal.

[0002]

[Prior Art]

 As a straw of this type, for example, the one described in Japanese Patent Publication No. 60-10721 has been known. This conventional technique is a beverage straw in which an inner tube is slidably mounted in an outer tube, and the outer tube has a funnel shape in which a front end portion thereof is composed of a tube portion and a mortar-shaped body, and A divergent opening at the rear end of the funnel-shaped body is integrally provided so as to communicate with the front end opening of the outer tube body having a locking portion at the front end, and the inner tube has a rear end opening. It is formed in a hopper shape that widens toward the inner peripheral surface of the mortar-shaped body, and the rear end opening peripheral edge of the rear end is formed so as to slidably contact the inner peripheral surface of the outer tube body. The outer peripheral surface of the inner tube body is formed so as to slidably contact the inner peripheral surface of the tube body, and when the inner tube is pulled out from the outer tube and formed into a use state, The tube is locked to the outer tube without being retrograde, and the inner tube is not airtight and laterally displaced. A drinking straw, characterized in that it is held in the outer tube.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional technique is to prevent water leakage and air leakage when the inner pipe is drawn out and used, and to prevent lateral blurring of the inner pipe, by the pipe body portion provided at the front end of the hopper-shaped portion of the outer pipe. However, this pipe part is a long piece that is useless when it is not used before pulling out the inner pipe from the outer pipe, which is a waste of resources and is uneconomical. Due to the above-mentioned tubular body, a large proportion has a short total length, resulting in a low effective utilization rate as a straw.

In order to eliminate the above-mentioned problems, the present invention has an outer locking collar part for keeping the liquid tightness and airtightness between the outer pipe and the inner pipe and preventing the lateral movement of the inner pipe and the removal thereof. The purpose is to reduce the overlap length of the inner and outer pipes and increase the effective utilization rate as a straw by forming them at the ends of the pipe and the inner pipe.

[0005]

[Means for Solving the Problems]

 The object of the present invention described above is to construct a drinking straw in which a plastic inner tube is also insertably inserted into a plastic outer tube, in which an inner collar is provided at the front end portion of the outer tube. A flange receiving groove is formed at the rear end of the pipe, the outer diameter of the inner pipe is set to be slightly smaller than the inner diameter of the outer pipe, and the outer diameter of the flange receiving groove of the inner pipe and the inner flange inner diameter of the outer pipe are set. And are set to be substantially equal to each other, the pull-out amount of the inner pipe drawn out from the rear opening edge into the outer pipe through the inner flange is restricted by the engagement of the flange receiving groove of the inner pipe with the inner flange, and This can be achieved by preventing the retrograde movement of the inner tube with respect to the tube.

[0006]

[Action]

 Since the inner diameter of the outer pipe and the outer diameter of the outer flange of the inner pipe are set to be approximately the same, and the outer diameter of the inner pipe is set to be substantially the same as the inner diameter of the inner flange of the outer pipe, the inner pipe inside the outer pipe is Since the flange is in sliding contact with the inner peripheral surface of the outer tube, and the inner flange of the outer tube is in sliding contact with the outer peripheral surface of the inner tube, when the inner tube is pulled out from the outer tube, the inner tube is pulled out smoothly without jerking. be able to.

In the vicinity of the end point of this drawer, the inner flange of the outer pipe rides over the flange receiving protrusion of the inner pipe via its slope, and contacts the outer flange of the inner pipe to lock the inner pipe to the outer pipe. The inner tube cannot be pulled out from the outer tube because the pull-out size of the inner tube can be limited, and the inner tube does not fall into the outer tube during use due to its flange receiving protrusion.

[0008]

【Example】

 Examples will be described with reference to the drawings. First, as shown in FIG. 2, the basic structure of the present invention is as shown in FIGS. 4 and 5 in which an inner pipe 3 made of plastic such as polyethylene or polypropylene has an inner pipe 3 made of plastic as shown in FIG. When constructing a beverage straw inserted so that it can be pulled out, the inner pipe 2 is provided at the front end of the outer pipe 1 as shown in FIGS. 2 and 6, and the rear end of the inner pipe 3 is shown in FIG. As shown in 6, a flange receiving groove 4 is formed.

Further, as shown in FIG. 1, the outer diameter d2 of the inner tube 3 is set slightly smaller than the inner diameter d1 of the outer tube 1, and the outer diameter d3 of the flange receiving groove 4 of the inner tube 3 and the outer tube The inner flange inner diameter d4 of 1 is set to be almost equal.

Then, as shown in FIGS. 1 and 4, the front portion of the inner pipe 3 inserted into the outer pipe 1 from the rear opening edge 1a is led out through the inner flange 2 as shown in FIG. As shown in FIGS. 8 and 9, the amount of pulling out the inner pipe 3 that has been drawn out is limited by the elastic engagement of the flange receiving groove 4 of the inner pipe 3 with the inner flange 2 as shown in FIGS. It can be used as a long beverage straw by blocking the retrograde movement of the inner tube 3 with respect to the outer tube 1.

That is, in order to change the unused state of the straw shown in FIGS. 4 and 6 to the used state of the inner tube drawer as shown in FIG. 5, first, the inner tube 3 is pushed into the outer tube 1 and the front end of the inner tube is pushed. As shown by the chain lines in Fig. 6, the inner pipe 3 is slightly inside and outside while the inner pipe 2 of the outer pipe 1 is shown as an arrow in Fig. 7 while the inner pipe 3 is outside of the inner pipe 2 of the outer pipe 1. It can be pushed out and pulled out. As the pulling operation is continued, the inner collar 2 of the outer tube 1 elastically engages with the collar receiving groove 4 of the inner tube 3 near the end point thereof to engage the outer tube 1 as shown in FIGS. It is possible to restrict the pull-out amount of the inner pipe 3 that is to be pulled and to prevent the inner pipe 3 from moving backward.

As shown in FIGS. 1 and 7, the inner flange 3 of the outer tube 1 slides in contact with the inner tube 3 of the outer tube 1 while the inner tube 3 of the outer tube 1 is slightly slackened while the outer tube 1 is being pulled out. Since the inner pipe 3 is slidably contacted with the inner pipe 3, the inner pipe 3 can be smoothly pulled out without jerking when the inner pipe 3 is pulled out from the outer pipe 1.

If the front end portion of the inner pipe 3 is formed in a slightly tapered shape in advance, the inner pipe 3 easily passes through the inner flange 2 of the outer pipe 1.

Further, the cross-sectional shapes of the inner collar 2 and the collar receiving groove 4 are, for example, semicircular, semicylindrical, triangular mountain-shaped or sawtooth-shaped, in addition to the square shape having the small dimension as described above. One of these cross-sectional shapes may be provided on the outer peripheral surface of the inner pipe 3 in a broken line shape.

That is, the inner flange 2 of the outer tube does not have to be provided on the entire circumference of the inner peripheral surface of the outer tube, and the inner flange projections may be partially projected at three or more locations at equal intervals.

[0016]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. As for the inner tube 3 in the outer tube 1, its flange receiving groove 4 is in sliding contact with the inner peripheral surface of the outer tube 1, and the inner flange 2 of the outer tube 1 is in sliding contact with the outer peripheral surface of the inner tube 3 as shown in FIG. Therefore, when the inner pipe 3 is pulled out from the outer pipe 1, the inner pipe 3 can be pulled out smoothly without jerking even if the overlap length with the outer pipe 1 is short, and when used, the inner pipe 3 and the outer pipe 3 can be pulled out. Since the overall length can be increased despite the short overlap length with tube 1, the first effect is that it has a high effective utilization rate as a straw and is resource-saving.

Further, near the end of the withdrawal of the inner pipe 3, the inner flange 2 of the outer pipe 1 rides over the flange receiving projection 5 of the inner pipe 3 via its inclined surface and engages with the flange receiving groove 4 of the inner pipe 3. Since the inner pipe 3 can be locked to the outer pipe 1 and the withdrawal dimension of the inner pipe 3 can be limited, the inner pipe 3 does not pull out from the outer pipe 1 and the inner pipe 3 is not pulled out. The second effect is that the tube 3 does not deviate and goes backwards so that it does not become shorter and can be used easily and reliably for withdrawal.

According to the second aspect, it is possible to add the effect that the inner pipe 3 can be more easily started to be pulled out from the outer pipe 1.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view showing an example of dimensions of essential parts of an outer tube and an inner tube of a straw according to the present invention.

FIG. 2 is a side view of an outer tube forming the straw of the present invention.

FIG. 3 is a side view of the inner pipe.

FIG. 4 is a side view of the straw according to the present invention in an unused state in which the inner tube of the straw is housed in the outer tube.

FIG. 5 is a side view of a state of use in which the inner tube is also inserted into the outer tube.

FIG. 6 is an enlarged cross-sectional view of an essential part showing a state when the inner tube of the straw according to the present invention is pulled out from the outer tube.

FIG. 7 is an enlarged cross-sectional view showing a state immediately before the inner flange of the outer tube is engaged with the flange receiving groove of the inner tube of the straw.

FIG. 8 is an enlarged cross-sectional view showing a state in which the inner flange of the outer pipe is also engaged with the flange receiving groove of the inner pipe.

FIG. 9 is a partial cross-sectional view further enlarging an essential part of the same.

[Explanation of symbols]

 1 Outer tube 2 Inner collar 1a Rear opening edge 3 Inner tube 4 Collar receiving groove d1 Outer tube inner diameter d2 Inner tube outer diameter d3 Groove outer diameter d4 Inner collar inner diameter

Claims (2)

[Scope of utility model registration request] 1. A beverage straw in which a plastic inner tube is also inserted in a plastic outer tube so as to be able to be drawn out, an inner tube 2 is provided at a front end portion of the outer tube 1, and an inner tube 3 is provided.
A flange receiving groove 4 is formed at the rear end portion, the outer diameter d2 of the inner tube 3 is set slightly smaller than the inner diameter d1 of the outer tube 1, and the outer diameter d3 of the flange receiving groove 4 of the inner tube 3 is set. And the inner flange inner diameter d4 of the outer tube 1 are set to be substantially equal to each other so that the withdrawal amount of the inner tube 3 derived from the rear opening edge 1a through the inner flange 2 into the outer tube 1 with respect to the inner flange 2 A drinking straw which is restricted by the engagement of the flange receiving groove 4 of the tube 3 and prevents the inner tube 3 from moving backward with respect to the outer tube 1. 2. The drinking straw according to claim 1, wherein the front end of the inner tube 3 is slightly tapered.