JP2013500762A - Telescopic device and manufacturing method thereof - Google Patents

Abstract

  The telescopic device comprises a base and a main body formed from a sheet material having a first surface and a second surface, the main body being arranged to be continuously wound around the base, One point on one surface is fixed to one point on the second surface at one starting point. A method for manufacturing the telescopic device is also disclosed.

Description

The present invention relates to a telescopic device and a method for manufacturing the telescopic device. The telescopic instruments are, for example, telescopic chopsticks that are usually used in pairs and used together with the other chopsticks.
However, the telescopic device may be another type of telescopic device, such as a knife, fork or spoon.

  Today, a variety of dining utensils are on the market and have existed for centuries. For example, common eating utensils include knives, forks, spoons and chopsticks. Meal utensils are both reusable and disposable. Chopsticks are usually made of bamboo or plastic, but may be made of metal, bone, ivory or various types of wood. In particular, wood and plastic are most often used for disposable chopsticks such as those used for take-out dishes. Bamboo and wooden chopsticks are relatively inexpensive, but there are environmental problems due to the raw materials. A similar problem applies to plastic chopsticks, causing environmental impact and recycling problems.

  Some people think that such instruments are inconvenient to carry because they require length.

  The features of the invention are set forth in the independent claims. Optional features of the invention are set out in the dependent claims.

  The implementation of the technology disclosed herein provides a telescopic device that is “pocket-sized”, which allows the user to carry the telescopic device much more conveniently than before.

  For example, travelers can carry these devices with backpacks particularly easily. Due to their small size, these instruments can be carried, for example, in the user's pocket as they are or in a small container.

The present invention will be described by way of example with reference to the accompanying drawings.
It is a layout diagram of an extendable instrument. FIG. 3 is a representative view of a telescopic device in a closed state, a partially extended state, and an extended state. It is a typical figure which shows the structure of the edge part of the main body (or tape part) of an expansion-contraction instrument. It is a typical figure which shows a mode that an expansion-contraction instrument is used with a 1st cap. FIG. 5 is a layout diagram of the first cap of FIG. 4. It is a layout figure which shows the chopsticks by injection molding which is one technique which shape | molds an expansion-contraction instrument. It is a figure which shows the 2nd chopsticks. It is a layout figure which shows the attachment technique to the elastic device of a restraint tool. It is a figure which shows a mode that the restraint tool of FIG. 8 is accommodated in an expansion-contraction apparatus.

Referring first to FIG. 1, a telescopic device, generally designated 100, is shown. The instrument 100 shown in this figure is a chopstick that is not the final form.
FIG. 1 shows a body 104 having a base 102 and, if made of sheet material, a first surface 106 (surface 106 shown in FIG. 1) and a second surface 108 (the “back surface of the first surface 106 in FIG. 1a)”. A telescopic instrument (chopsticks) 100 comprising: FIG. 1b is a view as seen from the direction of the arrow “A” in FIG. 1a.

  1a and 1b show a telescopic chopstick in an “unrolled form”. FIG. 1 c schematically shows a “rolled configuration” telescopic device 100 as will be described in detail below. In order to wind the telescopic device 100 in a form that can be used by the user, the body 104 of the telescopic device 100 is continuously wound around the base 102, and the point 110 on the first surface 106 ends at the end of the winding. Fixed to a point 112 on the two surfaces 108 at a starting point. One turn indicates that the circumference of the base 102 is completely wound by 360 °. In FIG. 1b, it can be seen that the spacing between successive rounds around the base 102 of the body 104 is shown exaggerated for clarity. As will be apparent from the following description, it is desirable that the continuous winding of the main body 104 around the base portion 102 be performed closely to each other so that there is no or substantially no gap 114 in one turn.

  In the embodiment of FIG. 1, the tip 116 of the chopstick 100 is a portion used by a user to grip food when used with the other pair of chopsticks (not shown). In an embodiment, the tip 116 is formed as an elongated body, generally designated 118, having a circular cross-section (shown in FIGS. 1b and 1c), and the body 104 is continuously wrapped around the base 102. In order to facilitate this, the overall shape is cylindrical. However, the base 102 may be any other elongated shape including, for example, a rectangular, triangular, square, or elliptical cross section. In the embodiment of FIG. 1, the base 102 has a length 120 of 3.7 cm, and the first end 122 (the lower portion of the base 102 in FIG. 1) has a cross-sectional diameter of 0.4 cm. Tapered to a diameter of 0.3 cm toward the end 123 of 116. Of course, other dimensions are possible. The tip 116 extends beyond the width 124 of the body portion 104. That is, as shown in the drawing, the length 120 of the base 102 is larger than the width 124 of the main body 104, and the main body 104 is arranged to wrap around the base 102, and in this case, the first end 122 ( The lower end of the tip is aligned with the first side (lower edge 126a) of the tape / body 104. In some embodiments, a hole is provided in the base 102 to accommodate the end of the restraint, details of which are described in detail in FIG.

In FIG. 1a, the base 102 is shown adjacent to the body 104 of the chopsticks 100, which is formed from sheet material. In the embodiment of FIG. 1, the body comprises a generally rectangular strip of tape defined by sides 126a, 126b, 126c, 126d. In the embodiment of FIG. 1, the tape length 128 is 60 cm, the width 124 is 2.5 cm, and the thickness is 0.05 to 0.1 cm. The tape has first and second major surfaces 106,108. In FIG. 1 b, the “upper” surface in the figure is the first surface 106, and the “lower” surface is the second surface 108. The base 102 has an elongated shape, and includes a first base portion 125 arranged so that the main body 104 is wound around the base 102 and a second base portion (tip) 116 extending beyond the wound base 125. In the embodiment of FIG. 1 a, the second base portion has at least one tapered portion 132.
Alternatively, the tip 116 may be provided without a tapered portion.

  The base 102 and the main body 104 may be integrally provided and formed by an injection molding process, as will be described in more detail with reference to FIG. Alternatively, as described with reference to FIGS. 6 and 7, they may be provided and assembled as individual components.

  In one embodiment, one or both of the base 102 and the body 104 are comprised of environmentally friendly products such as corn and / or yam, which greatly reduces the material cost of the part and in the injection molding process Includes corn starch / yammo starch that is easy to manufacture. In some embodiments, the material used is a recycled material. Due to the use of inexpensive materials and / or manufacturing processes, the telescopic device can also be considered disposable, and can thus be provided with take-out food and / or, for example, instant noodles or other fast food packs. is there. Alternatively, the telescopic device can be made from other plants and / or polymers, thermoplastic polymers (eg polyethylene, polypropylene), which do not emit toxic chemicals. Alternatively, metals such as stainless steel, aluminum or any other metal alloy can be used. However, it should be appreciated that the base 102 and / or body 104 can be made from other suitable materials including, for example, paper / cardboard, PVC and acrylic.

  The telescopic device disclosed herein is reusable or disposable. For example, the reusable telescopic device may be made of plastic with or without fasteners and with or without a cap, such as a silicon cap. The use of fixtures and caps will be described below.

  As described above, as shown in FIG. 1c, the body 104 is wrapped around the base 102 to form the telescoping chopsticks 100, thereby causing the first surface 106 (or “upper side” seen below FIG. 1b). Is wrapped around a curved surface 102a (circumferential) on the outside of the cylindrical base 102. When the body 104 is wound one turn around the base 102 and the curved surface 102a of the base portion 125 of the base 102 is adjacent / aligned to the body 104, the base portion 125 of the base 102 is completely covered by the body 104. In other words, the first surface 106 of the main body 104 contacts the second surface 108 of the main body 104 in the first rotation to the base 102. The wrapping process continues until the full length 128 of the body 104 is wrapped around the base 102 where the end 130 of the body 104 is secured as shown in FIG. 1c. At this time, one point 110 (substantially becoming the last rounded end) of the first surface 106 at the end 130 of the main body 104 is a point 112 on the second surface 108 immediately below, ie, the main body. 104 is fixed at the last round start point. The body 104 is secured at the end 130 over its entire width 124 for further stability, but at a minimum a single point 110, 112 is secured to hold it around.

  The tape is secured by any suitable means such as an adhesive (preferably approved for use by the Food and Drug Administration) or other suitable securing means.

  Of course, the tip 116 of the base 102 of the telescoping chopsticks 100 may be replaced with a suitable knife, fork or spoon part, and other types of telescopic instruments such as knives, forks and spoons may be provided. it can. Additionally or alternatively, a knife, fork or spoon part may be provided to be added to the tip 116, respectively.

  Next, referring to FIG. 2, three states of the telescopic chopsticks 200 are shown in an assembled state, that is, in a state where they can be used by the user. From the left side to the right side of FIG. 2, the three drawings (a), (b), and (c) show the chopsticks closed (or not expanded), respectively (state 1: original state), chopsticks Shows a partially expanded form (state 2: halfway state) and a chopsticks expanded form (state 3: maximum extended state).

  As shown in the leftmost figure (a), the body 104 is completely wrapped around the base 102 and its tapered upper end 116 projects from the wound body 104. In order to extend the chopsticks 200 from the closed configuration shown in FIG. 1A to the extended configuration shown in FIG. The user holds the lower portion 202 (shown in FIG. 2) of the chopsticks 200, holds the upper portion of the chopsticks 200, eg, the tip 116, and pulls it away from the lower portion 202. As a result, the user brings the telescopic chopsticks to the “state 2” in FIG. 2B, that is, the partially extended (or halfway) state. (Of course, to obtain this same effect, ie, as long as relative movement between the tip 116 and the lower portion 202 is obtained, the user can hold the upper portion 116 stationary and pull the lower portion 202.) As can be seen from “state 2” in FIG. 5B, the length of the chopsticks 200 is extended by the force pulled by the user. When the end of the body 104 is fixed as described in FIG. 1, the other rotations are free to move with respect to each other, and the “twisting” motion causes the rotation to be effectively spiral or helical. , The chopsticks are extended along the central axis 201 of the base 102 as shown in state 2 of FIG. To facilitate stretching, the user can assist in the natural twisting of the tape, and can also provide a “twisting” movement and stretch itself. For example, the user twists the hand holding the portion 116 in one direction of rotation about the shaft 201 and rotates the hand holding the lower portion 202 in the opposite direction about the shaft 201. Natural torsion can be facilitated or assisted. To reach “state 3”, which is the fully extended state shown in FIG. (C), the user simply pulls on the tip and the chopsticks are comfortable to the user, eg 15-20 cm. It only needs to be stretched to length or limited by the length of the body portion 104. Alternatively, it may be limited by other methods as described in detail below.

  When the telescoping chopsticks are gradually extended as shown in FIG. 2, a relative motion is provided between the base 102 and the lower portion 202 of the body 204 to hollow out the volume defined by the helical rotation. A portion 208 is formed.

  The chopsticks 200 are provided with a display 204 that indicates that the maximum length “safe” for the user has been reached. When the user tries to extend the chopsticks beyond this length, there is no overlapping portion between the spiral of the spiral rotation shown in FIG. 2 and the next round. For this reason, they are not mechanically integrated, and the chopsticks can be easily disassembled and loosened, or returned to a half-taped tape. For example, the display unit 204 is hidden on the second (outer) surface 108 of the main body portion 104 so that the chopsticks are not visible to the user in the “state 1” of FIG. It is provided in any manner, such as having a printed portion that is visible when the chopsticks are stretched toward the head. Thereby, the telescopic device can be extended in the direction of the axis 201 of the base 102, and the telescopic device includes a display unit 204 that indicates a predetermined maximum length of expansion of the telescopic device to the user. This is a visual display that prevents the user from extending the chopsticks beyond the “safe” extension length. That is, the display unit 204 is exposed on the second surface 108 of the main body 104 so that the display unit 204 is exposed to the user when the telescopic device is extended in the direction of the axis 201 of the base 102. It is a display part in the position.

  Referring to FIG. 3, various other structures of the end 300 of the distal base 102 of the body 104 are shown. In the chopsticks of FIG. 1, the main body 104 is generally rectangular, and has four sides 126a, 126b, 126c, and 126d that appropriately contact each other at right angles (90 degrees) and define the rectangle. The end portions 130 of the main body 104 in FIG. 3 (which can also be seen in “state 1” of the chopsticks in FIG. 2 but are not described there) all have a “tapered” shape, and the end of the main body 104 is rectangular There is a notch that does not have a right angle corner. As shown in the first three views (a), (b), and (c) of FIG. 3, in the simplest form, the taper is simply a triangular notch 302 at the end 130 and is tapered. Thus, tapered edges 300a, 300b, and 300c are formed. The advantage is that the entire tapered end 300a, 300b, 300c is secured to the first side 106 on the inside of the body 104 when the end portion 130 of the body 104 is wrapped around the immediately following turn. It is to increase the strength. When this structure is provided, a holding force is obtained around the curved outer surface of the chopsticks, and the fixing area on the circumference of the cylindrical chopsticks as a whole increases. This improves the mechanical strength.

  In the embodiment of FIG. (A), the cut portion of the notch is a simple straight cut portion that defines the straight line 300a. In the embodiment of FIGS. 3 (a) and 3 (b), the “ablation” edge details 300b and 300c can improve the impression in terms of appearance and function to the user.

  In FIG. 3 (d), the taper is an effective “V” -shaped bi-directional taper 300d that is cut off at the end of the tape. Due to the increased strength of this design, chopsticks without a cap, described in more detail with reference to FIGS. 4 and 5, will also have a high mechanical strength. This is because the additional mechanical strength is provided with an additional grip. The grip is equally provided on the top and bottom surfaces. As other details, the grip surface is emphasized at the bottom edge.

  As can be seen in all figures of FIG. 3, the end views of the telescopic chopsticks are the same regardless of the “final” state of the edge 300.

  With continued reference to FIG. 4, telescoping chopsticks 400 are shown with and without a cap (right and left views (a) and (b), respectively). In FIG. 4, the cap 402 is on the lower portion 404 of the telescoping chopsticks 400. That is, the cap 402 is provided to cover the outer surface 405 of the main body 104 when the main body 104 is wound around the base 102. The cap 402 plays at least one auxiliary role of the two. In the first beneficial structure, the cap 402 provides additional mechanical strength. The cylindrical shape in the stretched state, that is, the cylindrical shape when the upper part of the chopstick is moved relative to the lower part of the chopstick (the end closest to the user's hand when in use) The “hollow part” (described with reference to FIG. 2) of the lower part of the chopsticks formed by movement is more firmly held because it is less likely to be crushed by the cap 402. Further, if the user wishes to return the chopsticks to “state 1” of FIG. 2 by pushing the tip 116 back toward the first cap (with or without twisting in the opposite direction), a cap 402 is provided. This prevents the user from drawing the chopsticks 400 too much and prevents the base 102 from being pushed out in the opposite direction 408 through the bottom 406 of the chopsticks 400.

  The cap may be formed from various materials including silicon, metal, rubber and plastic.

  The stainless steel telescopic instrument can use a removable cap made of silicon or metal.

  Subsequently, referring to FIG. 5, the cap 402 of FIG. 4 is shown in more detail in elevation and plan views. The cap 402 is formed by a main body of a hollow cylindrical 410 as a whole. Of course, the body only needs to be partially hollow 410 to receive the base 102 and body 104 to be assembled and wrapped. Although the diameter of the cap of FIG. 5 is 1.0 cm, the dimensions of the cap 402 should be selected to match the dimensions of the telescopic device. The cap can assist in storage or, conversely, limit excessive storage where the chopsticks exceed the closure “state 1” of FIG.

  Although not shown, the chopsticks include a second portion to cover the base portion (ie, tip portion 116) that extends beyond the width 124 of the tape 104 in a fully wound form (eg, FIG. 2 (a)). The cap may be provided. In some embodiments, the second cap interacts with the first cap, wherein the chopsticks are placed or covered in a closed configuration (“State 1” in FIG. 2, FIG. (B)). Designed as such.

  FIG. 6 shows how the base 602 and the main body 604 shown in FIG. 6 (c) are coupled to each other, and are formed integrally with each other in the course of the injection molding process or individually. After being formed, they are fixed to each other. In the injection molding process, the body 604 is effectively coupled to the base 602 at a tangential plane 606 of a curved surface 608 that is cylindrically shaped as a whole of the base 602. This is best shown in the top cross-sectional view (a) of FIG. Alternatively, the body 604 is coupled to the base 602 at any other suitable angle. For example, in the view shown in cross-sectional view (b), body 604 is coupled to base 602 at a coplanar angle with radius 610 of generally cylindrical base 602.

  Of these two, in the arrangement on the tangential plane of FIG. 1A, at the point 612 where the main body 604 is coupled to the base portion 602, the angle of the circumference of the main body 604 at the start of the winding process is not so steep. Therefore, smooth winding around the base portion 602 of the main body 604 is facilitated, so that the tape can be wound more smoothly around the tip, and winding disturbance due to a sudden angle change is reduced. The use of a tip having a generally cylindrical, curved shape allows for a smoother winding.

  In the injection molding process, corn and / or yam (starch) liquid is injected into the mold, and then a typical injection molding process for manufacturing the base 602 and the main body 604 as described above is performed.

  Alternatively, a body 604 formed separately from the base 602 is coupled to the base 602 at any suitable point, for example, a point 614 that defines the entrance of the groove 616 in the base 602 shown in FIG. In this structure, the groove 616 is provided in the base 602 to receive the edge 618 of the body 604. Subsequently, the body 604 is mechanically fixed in the groove using, for example, an adhesive approved by the Food and Drug Administration, a pivot or a nail. In FIG. 6 (e), the base 602 is configured to perform a clip function in order to clip or hold the body 604 in place. As before, the body 602 includes an inlet 614 in the form of a groove 616 to receive the edge 618 of the body 604. In this embodiment, the main body portion 602 has a C shape including a portion 620 that can be elastically deformed to perform a tightening function of the main body 604. That is, the C shape can be provided so as to have an urging function for tightening the main body 604. Other types of clip structures can be considered, such as other nail clamps and other mechanical fastening structures. Of course, an adhesive may be used.

  Another exemplary embodiment of a telescoping chopstick in which the tip and tape are formed separately is shown in FIG. As shown in the figure, the chopstick tape 704 in FIG. 7 is made of a transparent PVC sheet having a length of 50 cm. The width 706 at one end (leftmost in FIG. 7) is 2.5 cm, and on the bottom side 708 of the tape (as viewed in FIG. 7), the tape has a step 710. As a result, the tape width 712 increases to 2.8 cm from about three-quarters of the total length of the tape. Naturally, the structure in which the width shown in FIG. 7 is enlarged is exemplary, and a structure in which another width of a taper shape or a flare shape is enlarged is also conceivable.

  In this embodiment, the base 702 is made of an acrylic tube having a diameter of 4 mm and a length of 3.5 cm. The tube 702 is provided with two holes 714a, 714b, which are provided by a drill, a punch or the like, or provided in the molding process.

  Prior to assembling the chopsticks of FIG. 7, the PVC tape can optionally be colored, for example painted / sprayed. Preferably, the chopsticks are coated so that the final result is sufficient to meet Food and Drug Administration standards. The tape is secured to the tip by any suitable means. In the embodiment of FIG. 7, holes 716 are provided in the tape as shown, and the tape is secured to the tip by a string (not shown). In particular, as described above with reference to FIGS. 1, 2, and 3, the tape is wound around the tip and fixed.

  With continued reference to FIG. 8, another method of manufacturing the telescoping chopsticks 800 is described. As described above, the telescopic chopsticks 800 includes a base 102 and a main body 104. Similar to that previously described, the base 102 has a tip 116 that extends beyond the width of the body 104. In order to avoid excessive stretching of the telescopic chopstick 800, the chopstick 800 includes a restraining tool 802 attached to the first part of the telescopic instrument and the second part of the telescopic instrument. In the embodiment of FIG. 8, the first part of the telescopic device is the base 102 and the second part of the telescopic device is the main body 104. These limit the extension of the telescopic device beyond a predetermined maximum extension length. Restraint 802 is attached to base 102 at 804 by means such as stitching or adhesion. The point 804 is provided at a “central portion” 807 in the length of the main body 104. The point 804 need not be the exact center point in the length of the body 104, but it is desirable that the point 804 be somewhere in the central section 807 to obtain satisfactory results. Thereby, the fixed restraint 802 described above limits excessive relative movement between the base 102 and the point 806 of the body 104. The restraining device 802 can be selectively fixed to an end portion in the length of the main body 104. That is, the restraint 802 is fixed to the main body 104 at the second point 808 in order to improve mechanical integrity. Of course, the restraint 802 is only shown schematically, and the components shown in this figure (or other figures) are not shown to scale.

  In another configuration, the first and second parts of the telescopic device are both on the body 104, preferably adjacent to the base 102, on different parts of the central portion 807 or the end portion 809 of the body 104. Exists. In the case where the restraining tool 802 is not fixed to the base portion 102, the base portion 102 is preferably fixed to the main body 104 or molded together therewith. Further, the restraining tool may be attached to the cap 810.

  In yet another configuration, the cap 810 may be the second part of the telescopic device, and the first part may be either the base 102 or the body 104. When in the body 104, the restraint is preferably secured to a portion adjacent to the base.

  In order to secure the restraint 802 to the telescopic chopsticks 800, the restraint 802 is first attached to the base 102 at point 804 as described above. Subsequently, the main body 104 is partially wound around the base 102, and the restraint 802 is held without being wound by the protruding portion (projecting from the point 804). When the wrapping process reaches or approaches point 806, the wrapping is halted and the restraint is stopped prior to a continuation and subsequent fixation with the restraint 802 at end portion 809, eg, point 808. 802 is secured to the body 104 at a central portion 807, eg, point 806.

  In another configuration shown in FIG. 8 (b), the restraint 802 is attached to the cap 810 at a point 808. As previously described with reference to FIG. 4, the cap 810 is provided to cover the outer surface of the body for mechanical integrity and user confidence when wound around the base.

  Of course, other fasteners can be provided on the telescopic device. The restraint 802 is made of any suitable material, such as cotton or an industrial material such as nylon or steel wire to facilitate cleaning. The restraining tool is arranged to extend along the inner wall portion of the hollow outer shell of the telescopic device when extended. When housed in the hollow shell, the restraint is arranged in a coil.

  FIG. 9 illustrates how the restraining tool 802 can be received within the hollow portion 804 of the chopsticks 800 during relative movement between the tip 116 and the base 202 or cap 808. Again, this figure is exemplary and shows that the length of the restraint 802 is longer than the length of the telescopic chopsticks 800 fully extended, and is not limiting.

  The instrument (chopsticks) is shown by way of example only and, of course, various modifications can be made to the techniques described herein without departing from the spirit and scope of the appended claims. Features described in connection with one aspect may be combined with features related to other aspects. If the instrument is not a chopstick but a fork, knife or spoon, for example, the fork tip, spoon body or knife blade is naturally provided at the telescopic part of the instrument at the head of the instrument.

Claims (27)

  A telescopic device comprising a base and a main body formed of a sheet material having a first surface and a second surface, the main body being arranged to be continuously wound around the base and having a single end A telescopic device, wherein one point on the first surface of the part is fixed to one point on the second surface at the starting point of the one turn.   The body is wound around the base so that the length of the base is greater than the width of the body and the first end of the base is aligned with the first side of the body. The telescopic instrument according to claim 1.   The telescopic device according to claim 1 or 2, wherein the base has an elongated shape having a first base portion around which the main body is wound and a second base portion extending beyond the wound base.   The telescopic device according to claim 3, wherein the second base portion has at least a tapered portion.   5. The device according to claim 1, wherein the telescopic device is extendable in the axial direction of the base, and the telescopic device includes a display unit for indicating a predetermined maximum extension length of the telescopic device to a user. The telescopic device described in 1.   The display unit includes a display unit at a position on the second surface of the main body that is exposed so that the display unit is visible to the user when the telescopic device is extended in the axial direction of the base. The telescopic instrument according to claim 5.   The telescopic device further comprises a restraint attached to a first part of the telescopic device and a second part of the telescopic device that restricts extending beyond a predetermined maximum extension length. The telescopic instrument according to any one of the above.   The telescopic device according to claim 7, wherein the one part of the telescopic device is the base, and the second component of the telescopic device is the main body.   The telescopic device according to claim 8, wherein the second part is a central portion in the length of the main body.   The telescopic device according to any one of claims 7 to 9, wherein the restraint is attached to an end portion of the main body in length.   The telescopic device according to any one of claims 8 to 10, wherein the restraint is attached to a cap, and the cap covers an outer surface of the main body when the main body is wound around the base.   The telescopic device according to any one of claims 1 to 10, further comprising a cap that covers an outer surface of the main body when wound around the base.   The telescopic device according to any one of claims 1 to 12, wherein the base includes a clip for fastening to the main body.   The telescopic device according to any one of claims 1 to 12, wherein the base and the main body are integrally formed with each other by an injection molding process.   The telescopic device according to any one of claims 1 to 14, wherein the base portion has a cylindrical shape as a whole.   The telescopic device according to claim 1, wherein at least a part of the device is made of corn or yam.   A method for manufacturing an elastic device, comprising the step of continuously winding a body formed of a sheet material around a base, the body having a first surface and a second surface, Fixing one point on the first surface of the section to one point on the second surface at the one-time starting point.   The length of the base is greater than the width of the body, and the method comprises the step of aligning a first end of the base with a first side of the body and wrapping the body around the base; The method of claim 17.   19. A method according to claim 17 or 18, further comprising covering the outer surface of the body wrapped around the base with a cap.   The telescopic device is extendable in the axial direction of the base, and the method further comprises the step of providing the telescopic device with a display for indicating a user a predetermined maximum extension length of the telescopic device. Item 20. The method according to any one of Items 17 to 19.   A step of providing the display unit, which is exposed so that the display unit can be seen by a user, at a position on the second surface of the main body when the telescopic device is extended in the axial direction of the base unit; 21. A method according to any of claims 17-20.   Attaching the restraint to the first part of the telescopic device; and attaching the restraint to the second part of the telescopic device, wherein the restraint has a predetermined maximum extension length. The method according to any one of claims 17 to 21, wherein the stretching beyond the limit is restricted.   23. The method of claim 22, wherein the first part of the telescopic device is the base and the second part of the telescopic device is the body.   24. A method according to claim 22 or 23, wherein the second part is a central portion in the length of the body.   25. A method according to any of claims 22 to 24, comprising attaching the restraint to an end portion in the length of the body.   26. A method according to any of claims 22-25, further comprising attaching the restraint to a cap that covers an outer surface when the body is wrapped around the base.   27. A method according to any of claims 17 to 26, further comprising the step of covering the outer surface of the body disposed around the base with a cap.

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