JP5216374B2 - Portable chopsticks - Google Patents

Description

  The present invention relates to portable chopsticks. More specifically, the length of the chopsticks can be shortened when being carried, and the length of the chopsticks can be made long when used, which is very convenient for carrying. In addition, it is very easy to change the length of the chopsticks and extend or retract the chopsticks. Also, when using the chopsticks, the length of the chopsticks suddenly shortens and shrinks. It is about a very reliable, easy-to-use portable chopsticks that has nothing.

  In general, when you eat at home, you have your own chopsticks and it is easy to hygienically manage chopsticks, but when you eat at restaurants and cafeterias on the go, you should manage hygiene of chopsticks. Because it is not possible to do it by itself, restaurants and cafeterias often have wooden disposable chopsticks. In addition, wooden chopsticks are attached to lunch boxes sold at stores. Therefore, there is a problem that deforestation progresses and nature is destroyed by disposing such disposable chopsticks.

  Moreover, since disposable chopsticks after use are incinerated as garbage, there is a problem that carbon dioxide gas is generated thereby polluting the atmosphere.

  As a means for solving such a conventional problem, resin chopsticks are repeatedly used in restaurants and canteens in order to reduce the disposable use of wooden disposable chopsticks. However, there is a problem that eating in a restaurant or canteen using chopsticks used by many strangers is not preferable.

  Therefore, various types of portable chopsticks have been conventionally proposed from the viewpoint that each individual carries his / her own chopsticks.

Portable chopsticks disclosed in Patent Document 1 below is a telescopic, respectively chopsticks of the pair of chopsticks, a long cylindrical chopsticks upper half, and is housed in the interior of this thin chopsticks It has a chopstick lower half with a tip, and when carrying chopsticks, the chopstick lower half is housed in a long cylindrical chopstick upper half, and when using chopsticks, the lower chopstick lower half is on the cylindrical chopsticks. Swinged out from the half, the portable chopsticks were made longer as a whole.

When the chopsticks are used, the outer peripheral length of the lower end connection part of the upper half of the cylindrical chopsticks is short, and conversely, the upper end connection part of the lower half of the chopsticks is longer. In the half part, the upper end connection part of the lower half part of the chopsticks was caught by the lower end connection part of the upper half part of the cylindrical chopsticks, and both connection parts were stopped by the friction of the chopstick material.
JP 2006-271554 A

  However, according to the conventional portable chopsticks described in Patent Document 1, when the chopsticks are used, the upper end connecting portion of the lower half of the chopsticks is connected to the lower end of the upper half of the cylindrical chopsticks. Since both the connection parts are simply stopped by friction of the chopstick material, when using the chopsticks, for example, if the chopsticks are pressed down strongly, the chopstick material will be disengaged and the chopsticks will be disengaged. There is a problem that the half part enters the upper half part of the cylindrical chopsticks and the chopsticks length may suddenly become shorter and shrink.

  Also, for example, if liquid that reduces friction, such as oil contained in food dishes, has permeated into the connection between the upper half of the cylindrical chopsticks and the lower half of the chopsticks, The upper end connection part of the half cannot be stopped by friction of the chopstick material, and therefore, there is a problem that it is inferior in reliability and in some cases it is not easy to use.

  The object of the present invention is to solve the above-mentioned problems of the prior art, and is very convenient to carry, and further, the operation of extending and retracting the chopsticks by changing the length of the chopsticks can be performed very easily, The object is to provide a highly reliable and easy-to-use portable chopstick that does not cause any trouble that the length of the chopstick suddenly shortens and shrinks when using chopsticks.

  In order to achieve the above object, the present invention provides a pair of portable chopsticks, each chopstick having a predetermined length of a cylindrical chopstick upper half, and a tapered chopstick accommodated in the upper half. It consists of a lower half and a stopper that covers the upper end of the upper half of the cylindrical chopsticks. When using chopsticks, the lower half of the chopsticks are swung out from the upper half of the cylindrical chopsticks, and they are joined together. In a portable chopstick in which one long chopstick is formed, the upper end of the tapered chopstick lower half has an outer diameter slightly smaller than the inner diameter of the lower end of the cylindrical chopstick upper half. A large-diameter portion for connection is provided, and a spiral groove in the right-hand or left-hand screw direction is provided on the outer peripheral surface of the large-diameter portion for connection, and the depth of the bottom wall of the spiral groove is below the lower edge of the large-diameter portion for connection. It gradually becomes shallower from the start end to the end, and spirals on the inner surface near the lower end of the upper half of the cylindrical chopsticks. When using chopsticks, the lower half of the chopsticks are swung downward with respect to the upper half of the cylindrical chopsticks, and the portion near the lower end of the upper half of the cylindrical chopsticks. The inward protrusion of the upper half of the lower half of the chopsticks hits the step of the lower edge of the large connecting diameter, and then the upper half of the chopsticks and / or the lower half of the chopsticks are rotated clockwise or counterclockwise, The inward protrusion of the upper half of the chopstick enters the spiral groove from its starting end, and further, the inward protrusion of the upper half of the chopstick and / or the lower half of the chopstick is rotated in the same direction so Finally, the tip of the inward protrusion is engaged with the bottom wall near the end of the groove, and the upper and lower chopsticks are joined together. By rotating the body and / or the lower half of the chopsticks in the opposite direction, the tip of the inward protrusion and the bottom wall of the spiral groove are disengaged, and the inward protrusion is screwed. Proceeding in the opposite direction to the above in the groove, finally the inward protrusion protrudes from the groove start end, and the lower chopstick half is placed inside the upper half of the cylindrical chopsticks. It is said.

  The portable chopsticks according to the present invention are provided with a connecting large diameter portion having an outer diameter slightly smaller than the inner diameter of the lower end portion of the cylindrical chopstick upper half at the upper end portion of the tapered chopstick lower half of each chopstick. The outer circumferential surface of the large diameter portion is provided with a spiral groove in the direction of right or left thread, and the depth of the bottom wall of the spiral groove is from the start end opened downward from the lower edge of the large connection diameter portion to the end portion. The inner surface of the upper half of the cylindrical chopsticks is closer to the lower end of the cylindrical chopsticks, and an inward projection that fits into the spiral groove is provided. On the other hand, the lower half of the chopsticks are swung downwards, and the inward protrusion of the lower end of the upper half of the cylindrical chopsticks hits the step on the lower edge of the large connecting diameter at the upper end of the lower chopsticks. Rotate the upper half of the chopsticks and / or the lower half of the chopsticks clockwise or counterclockwise so that the inward protrusion of the upper half of the chopsticks is placed in the spiral groove. Entering from the beginning, and further rotating the upper half of the chopsticks and / or the lower half of the chopsticks in the same direction, the inward protrusion advances in the spiral groove, and finally the tip of the inward protrusion is the end of the groove. The upper half of the chopsticks and the lower half of the chopsticks are joined together, and the upper half of the chopsticks and / or the lower half of the chopsticks are placed in the opposite direction after use. By rotating, the engagement between the tip of the inward protrusion and the bottom wall of the spiral groove is disengaged, and the inward protrusion advances in the spiral groove in the opposite direction, and finally the inward protrusion is the groove. The lower half of the chopsticks comes out from the starting end and is accommodated in the upper half of the cylindrical chopsticks. According to the portable chopsticks of the present invention, the chopsticks are very convenient for carrying. The operation of extending and contracting chopsticks by changing the length of the chopsticks can be done very easily, and when using chopsticks, the length of the chopsticks suddenly shortens and shrinks There is no such thing as causing troubles, an effect that is very reliable.

  In addition, the portable chopsticks of the present invention can gently lower the chopstick lower half by its own weight when the tapered chopstick lower half is put in and out of the cylindrical chopstick upper half, The operation of putting in and out of the tapered chopsticks lower half is very elegant, so it is pleasant and satisfying for users of portable chopsticks, and is very easy to use. There is an effect that there is.

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

In this specification, the upper and lower sides are based on FIG. 5, the upper side is the upper side of FIG. 5, the lower side is the lower side, and the left and right sides are downward.

  Note that since a pair of portable chopsticks have the same structure, only one of the chopsticks is shown in the drawing.

  FIG. 1 is a perspective view showing an embodiment of a portable chopstick according to the present invention. FIG. 2 is a longitudinal sectional view showing a state where the tapered chopstick lower half is housed inside the cylindrical chopstick upper half of the embodiment of the portable chopsticks of the present invention.

  Referring to FIGS. 1 and 2, a pair of portable chopsticks is made of, for example, aluminum, and each chopstick is housed in a cylindrical upper chopsticks half (1) having a required length and the inside thereof. It consists of a tapered chopstick lower half (2) and a stopper (3) that covers the upper end (1a) of the cylindrical chopstick upper half (1).

  First, as shown in FIG. 1, a tapered chopstick lower half (2) is inserted from an upper end (1a) of a cylindrical upper chopstick upper half (1) from its tapered end (2b), The cylindrical chopstick upper half (1) is housed inside, and then the stopper (3) is secured to the upper end (1a) of the cylindrical chopstick upper half (1).

  As shown in FIG. 2, the portable chopsticks according to the present invention are carried with the chopstick lower half (2) placed inside the cylindrical chopstick upper half (1).

  The upper end (2a) of the tapered chopstick lower half (2) of the portable chopsticks of the present invention has an outer diameter slightly smaller than the inner diameter of the lower end (1b) of the cylindrical chopstick upper half (1). A large-diameter portion (4) is provided, and a spiral groove (5) in the right-hand screw direction is provided on the outer peripheral surface of the large-diameter portion for connection (4). The depth of the bottom wall (6) of the spiral groove (5) is downward from the lower edge of the connecting large diameter portion (4) as shown in the developed view of FIG. 7 and the developed sectional view of FIG. The depth gradually becomes shallower from the opening start end (5a) to the end end (5b).

  On the other hand, an inward protrusion (10) that fits in the spiral groove (5) is provided on the inner surface of the upper half of the cylindrical chopsticks (1) near the lower end. Moreover, the internal thread part (11) is provided in the inner surface of the upper end part (1a) of a cylindrical chopstick upper half (1).

  The plug (3) has an outer diameter substantially the same as the outer diameter of the upper end (1a) of the cylindrical chopstick upper half (1), and a knurled portion is provided on the outer peripheral surface of the plug (3). The plug body (3) has an insertion part (13) to be inserted into the upper half of the upper half of the chopsticks (1a), and the insertion part (13) is provided with a male screw part (14). .

  The upper half of the cylindrical chopsticks (1) is threaded into the female thread (11) on the inner surface of the upper end of the cylindrical chopsticks, and the male thread (14) of the insertion part (13) of the plug (3) is screwed into the upper half of the cylindrical chopsticks. The stopper (3) is covered with the upper end (1a) of (1).

  When the portable chopsticks according to the present invention are used, the cylindrical chopstick upper half (1) is inserted into the cylindrical chopstick upper half (1) shown in FIG. ) Is held with one hand (right hand), for example, and the tapered end (2b) of the lower chopsticks half (2) is directed downward. Then, as shown in FIG. 3, the chopstick lower half (2) descends quickly and gently due to its own weight, and the upper end of the chopstick lower half (2) has a large connecting diameter (4) lower edge. The step portion (4a) of the upper portion of the cylindrical chopstick upper half (1) is in contact with the inward protrusion (10) of the portion near the lower end.

  In this case, the lowering speed of the lower chopsticks half (2) is relatively slow. When the portable chopsticks according to the present invention are made of, for example, aluminum, the lowering of the chopsticks lower half (2) is from the start to the end. Takes about 0.8 seconds.

  As shown in FIG. 2, when the tapered chopstick lower half (2) is placed inside the cylindrical chopstick upper half (1), the upper end of the tapered chopstick lower half (2) Since there is no space between the plug (3) and the distal end of the insertion part (13), the tapered chopstick lower half (2) is formed larger as the chopstick lower half (2) is lowered. ) The space between the upper end and the plug (3) tip of the plug (3) has a so-called negative pressure. In order to compensate for this pressure difference, air (from a slight gap between the inner peripheral surface of the upper half of the cylindrical chopsticks (1) and the large connecting diameter (4) at the upper end of the lower chopsticks (2) ( Outside air) flows in. Therefore, even if the cylindrical chopstick upper half (1) is held with one hand (right hand) and the tapered end (2b) of the chopstick lower half (2) is directed downward, the lower chopstick half ( 2) does not fall at a stretch.

  Next, while holding the tapered end (2b) of the chopstick lower half (2) thus shaken with the other hand (left hand), the upper chopstick half (1) as shown in FIG. When slowly turning counterclockwise from the top (counterclockwise direction), the inward protrusion (10) of the upper half of the chopsticks (1) is inserted into the spiral groove (5) from its starting end (5a). Then, by rotating the upper half of the chopsticks (1) in the same direction, the inward protrusion (10) advances in the spiral groove (5), and finally the tip of the inward protrusion (10) The bottom half (6) close to the groove end (5b) is pressed against and engaged, and the upper half of chopsticks (1) and the lower half of chopsticks (2) are joined together to form one long chopstick. Is formed.

  In FIG. 5, the tip of the inward protrusion (10) of the upper chopsticks (1) is engaged with the bottom wall (6) of the spiral groove (5) of the lower chopsticks (2), It is a principal part expanded vertical sectional view which shows the use condition of the chopsticks with which the upper half (1) and the lower chopsticks half (2) were combined. FIG. 6 shows that the tip of the inward protrusion (10) of the upper half of chopsticks (1) in FIG. 5 is engaged with the bottom wall (6) of the spiral groove (5) of the lower half of chopsticks (2). FIG.

  FIG. 7 is an enlarged development view of the spiral groove (5) of the chopstick lower half (2). When the upper chopstick upper half (1) and the chopstick lower half (2) are joined together, the upper chopstick upper half is shown. The position of the inward protrusion (10) of the body (1) is shown together. FIG. 8 is an enlarged development view of the spiral groove (5) of the chopstick lower half (2) along the line AA in FIG.

  FIG. 9 is an enlarged longitudinal sectional view showing a portion where the stopper (3) is attached to the upper end (1a) of the upper chopsticks half (1) in FIG.

  Then, after using the chopsticks, for example, the upper half of the chopsticks (1) is rotated in the opposite direction (clockwise direction), so that the tip of the inward protrusion (10) and the spiral groove (5) Is disengaged from the bottom wall (6), and the inward protrusion (10) advances in the spiral groove (5) in the opposite direction to the above, and finally the inward protrusion (10) is the groove start end. Exit from (5a).

  From this state, this time the chopstick lower half (2) is directed upward with respect to the cylindrical chopstick upper half (1). Then, the chopstick lower half (2) descends quickly and gently by its own weight, enters the cylindrical chopstick upper half (1), and enters the storage state shown in FIG. . Also in this case, the lowering speed of the lower chopsticks half (2) is relatively gentle. When the portable chopsticks according to the present invention are made of aluminum, for example, from the start to the end of the lower chopsticks lower half (2). Takes about 0.9 seconds.

  This is because when the lower half of the chopsticks (2) is directed upward with respect to the upper half of the cylindrical chopsticks (1), the connecting diameter large portion (4) on the tapered chopsticks lower half (2) side There is a large space between the tip and the insertion part (13) tip of the plug (3) on the cylindrical chopstick upper half (1) side, and the lower chopstick half (2) is lowered. When pressing, the lower half of the chopsticks (2) does not descend in the upper half of the cylindrical chopsticks (1) in order to descend while pressing the air in the space. Pressed by the lower chopsticks half (2) and slightly between the inner circumferential surface of the cylindrical upper chopsticks (1) and the large connecting diameter (4) at the upper end of the chopsticks lower half (2) The chopstick lower half (2) is finally stored inside the cylindrical chopstick upper half (1) by its own weight.

  Since the rotation of the upper chopsticks (1) and the lower chopsticks (2) is relative, when using the chopsticks, the cylindrical chopsticks upper half (1) to the tapered lower chopsticks half. In the state of swinging out (2), the inward protrusion (10) of the upper half of the chopsticks (1) is placed in the spiral groove (5) of the large connecting diameter (4) of the lower half of the chopsticks (2). In order to enter, one or both of the upper half (1) and the lower half (2) of the chopsticks may be rotated clockwise or counterclockwise.

  That is, as shown in FIG. 4, for example, with the right hand, one cylindrical chopstick upper half (1) may be slowly turned counterclockwise (counterclockwise) as viewed from above, With the left hand, the other tapered chopstick lower half (2) may be slowly turned clockwise (clockwise) when viewed from above. Alternatively, both of these operations may be performed simultaneously with the right hand and the left hand.

  Similarly, after using the chopsticks, by rotating one or both of the upper chopsticks half (1) and the lower chopsticks half (2) in the opposite direction to the above case, The engagement between the tip of the inward protrusion (10) and the bottom wall (6) of the spiral groove (5) is released, and the inward protrusion (10) advances in the spiral groove (5) in the reverse direction. Finally, the inward protrusion (10) protrudes downward from the groove start end (5a), and the chopstick lower half (2) can be placed inside the cylindrical chopstick upper half (1).

  In the embodiment of the present invention described above, the spiral groove (5) of the large connecting diameter portion (4) of the lower chopstick half (2) is illustrated as having a so-called right-handed spiral shape. The spiral groove (5) may have a so-called left-handed spiral shape, in which case the lower chopstick half (2) relative to the cylindrical upper chopstick half (1) when the chopsticks are used. ), The rotation direction of the upper half of the chopsticks (1) and / or the lower half of the chopsticks (2) may be reversed from that in the above embodiment.

  In the above embodiment of the present invention, for example, the length of the cylindrical upper half of chopsticks (1) is 115 mm, the outer diameter is 8 mm, and the wall thickness is 0.5 mm.

  On the other hand, the length of the upper half (1) of the cylindrical chopsticks (1) and the lower half (2) of the tapered chopsticks accommodated in the upper half (2a) of the upper end (2a) is 4 mm. ) Has an outer diameter of 6.9 mm, which is slightly smaller than the inner diameter of the lower end portion (1b) of the cylindrical chopstick upper half (1). The length (height) of the connecting large diameter portion (4) is 10 mm.

  And the width | variety of the spiral groove (5) of the right-handed screw direction provided in the outer peripheral surface of this large diameter part for connection (4) is 2 mm, and the step part (4a) of the large diameter part for connection (4) lower end The width of the groove start end portion (5a) opened in FIG. 2 is about twice as wide as the groove width in the circumferential direction of the large connecting diameter portion (4). ) When the lower half of chopsticks (2) is swung out and one or both of them is rotated while pulling both, the inward protrusion (10) of the upper half of chopsticks (1) It is possible to easily enter the spiral groove (5) from the groove start end (5a).

  The diameter of the inward protrusion (10) on the cylindrical chopstick upper half (1) side is 1.2 mm, and the height of the inward protrusion (10) from the inner surface of the cylindrical chopstick upper half (1) is About 0.5 mm. The inward protrusion (10) is provided in an inward protruding shape by press molding at a position 6 mm from the lower end of the cylindrical chopstick upper half (1).

  The depth of the spiral groove (5) is deeper than the height of the inward protrusion (10) at the groove start end (5a), and the depth at which the inward protrusion (10) can enter the spiral groove (5). It is. The depth of the spiral groove (5) gradually becomes shallower in accordance with the rotational direction of the spiral groove, and finally the depth of the bottom wall (6) is made zero at the groove end portion (5b). That is, it is flush with the outer peripheral surface of the large connecting diameter portion (4).

  The tip of the inward protrusion (10) is brought into press contact with the bottom wall (6) near the terminal end (5b) of the spiral groove (5), and the inward protrusion (10) is stopped. It is what

  Further, the outer diameter of the plug (3) that is put on the upper end of the cylindrical chopstick upper half (1) is 8 mm, the same as the outer diameter of the cylindrical chopstick upper half (1).

  Note that the above-described dimensions of the portable chopsticks according to the embodiment of the present invention are only one example, and the size and size of the portable chopsticks according to the present invention can be calculated by using the upper half of the cylindrical chopsticks (1 In contrast, the lowering speed when the tapered chopstick lower half (2) is lowered by its own weight and put in and out is not limited to the above.

  The cylindrical chopsticks upper half (1) constituting the portable chopsticks of the present invention of the above embodiment has a lower end portion of the cylindrical chopsticks upper half (1) by cutting, for example, a metal pipe into a required length. It can be manufactured by providing the inner protrusion (10) on the inner surface of (1b) so as to protrude inward by press formation. The other tapered chopsticks lower half (2), the connecting diameter large portion (4) of the upper end portion (2a), and the spiral groove (5) on the outer peripheral surface of the connecting large diameter portion (4) are: For example, the metal cutting by computer control can be manufactured with extremely high productivity, and the portable chopsticks of the present invention can be provided to the market at a low cost.

  The portable chopsticks of the present invention of the above embodiment are made of aluminum, but this may be made of other metals or materials such as plastic, wood, bamboo and the like.

  Also, the structure of the plug (3) that is put on the upper end (1a) of the cylindrical chopstick upper half (1) is not limited to that of the above embodiment.

  Thus, according to the portable chopsticks of the present invention, it is very convenient to carry, and the operation of extending and contracting the chopsticks by changing the length of the chopsticks can be performed very easily.

  In addition, for example, when using chopsticks, the tapered end of the chopsticks tapered chopsticks half (2) abuts against a dish (not shown), and as shown in FIGS. 2) When the force in the direction of the arrow (A) is applied to the upper half of the cylindrical chopsticks (1), the inward protrusion (10) is formed in the spiral groove (5). The lower chopsticks half (2) is not pushed into the cylindrical upper chopsticks half (1) in order to hit the lower wall portion (7) and therefore the chopstick length is suddenly shortened. It does not cause any trouble that shrinks and is very reliable.

  Also, it is easy to use.

  When the portable chopsticks according to the present invention are used, the cylindrical chopstick upper half (1) is removed from the state in which the tapered chopstick lower half (2) is placed inside the cylindrical chopstick upper half (1). For example, hold it with one hand (right hand) and point the tapered end (2b) of the chopstick lower half (2) downward. Then, the chopstick lower half (2) is quickly and gently lowered by its own weight, and the chopstick lower half (2) is shaken out. Next, in this state, the upper half of the chopsticks (1) is slowly turned, for example, counterclockwise, and the inward protrusion (10) of the upper half of the chopsticks (1) is placed in the spiral groove (5). The tip of the inward protrusion (10) is brought into pressure contact with the bottom wall (6) close to the groove end portion (5b) and engaged, and the upper chopstick half (1) and the lower chopstick half (2) Is a long chopstick that is joined together.

  In addition, after using the chopsticks, first, the upper half of the chopsticks (1) is rotated in the opposite direction (clockwise direction) to the tip of the inward protrusion (10) and the spiral groove (5). Is disengaged from the bottom wall (6), and the inward protrusion (10) advances in the spiral groove (5) in the opposite direction to the above, and finally the inward protrusion (10) is the groove start end. Exit from (5a).

  Next, from this state, it is only necessary to turn the lower chopstick half (2) upward with respect to the cylindrical upper chopstick upper half (1). As a result, the lower chopsticks half (2) is quickly and gently lowered by its own weight, enters the upper half of the chopsticks (1), and enters the retracted state. Also in this case, the lowering speed of the chopstick lower half (2) is relatively gentle.

  Thus, the portable chopsticks of the present invention are not lowered by the weight of the lower chopsticks half (2) when the chopsticks lower half (2) is put in and out of the cylindrical chopsticks upper half (1). It is laid-back, very elegant, and enjoyable and satisfying for the user of portable chopsticks, and is very easy to use.

  Furthermore, according to the portable chopsticks of the present invention, for example, liquids that reduce friction such as oil contained in meals of cooking are used for upper chopsticks (1) and lower chopsticks (2). Even if it enters into the connecting part (connecting part) to the chopstick upper half (1), the chopstick lower half (2) does not enter into the inside at all.

  This is because, as described above, the force in the direction of the arrow (A) shown in FIGS. 5 and 6 that pushes the chopstick lower half (2) into the upper chopstick upper half (1). Even when it acts, the inward protrusion (10) hits and engages with the lower side wall (7) of the spiral groove (5) in the vicinity of the stop point, so that the lower chopstick half (2) is cylindrical chopsticks. Liquid that does not get pushed into the upper half (1) and therefore reduces friction, such as oil, is applied to the upper chopsticks (1) and lower chopsticks (2). Even when it enters into the connecting part (connecting part), the chopsticks length does not suddenly shorten and shrink.

  On the other hand, according to conventional portable chopsticks, when using chopsticks, the upper end connection part of the lower half of the chopsticks and the lower end connection part of the upper half of the cylindrical chopsticks are simply stopped by friction of the chopsticks material. For example, if the taper end of the lower half of the chopsticks hits the cooking plate, and the force that pushes it into the upper half of the cylindrical chopsticks acts on the lower half of the chopsticks, There is a risk that the material will be disengaged due to friction and the lower half of the chopsticks will enter the upper half of the cylindrical chopsticks, causing the chopsticks length to suddenly shorten and shrink.

  In addition, according to conventional portable chopsticks, for example, liquid that reduces friction, such as oil contained in meals, oozes into the connection between the upper half of the cylindrical chopsticks and the lower half of the chopsticks. In such a case, the upper end connection part of the lower half of the chopsticks cannot be stopped by the friction of the chopsticks material, which is inconvenient.

It is a disassembled perspective view which shows embodiment of the portable chopsticks of this invention. It is a longitudinal cross-sectional view which shows the state by which the taper-shaped chopstick lower half was stored in the cylindrical chopstick upper half of the embodiment of the portable chopsticks of this invention. It is a perspective view which shows the state of the beginning stage which swung out the taper-shaped chopstick lower half from the inside of the cylindrical chopstick upper half of embodiment of the portable chopsticks of this invention. The perspective view shows a state where the upper half of the chopsticks is rotated counterclockwise in the final stage where the tapered lower chopsticks are swung out from the inside of the upper half of the cylindrical chopsticks. In the embodiment of the portable chopsticks of the present invention, the tip of the inward protrusion of the upper half of the chopstick is engaged with the bottom wall of the spiral groove of the lower chopstick half, so that the upper half of the chopstick and the lower half of the chopstick are 1 It is a principal part expanded vertical sectional view which shows the use condition of the chopsticks couple | bonded with the book. FIG. 6 is a partially enlarged longitudinal sectional view showing a part where the tip of the inward protrusion of the upper chopsticks half in FIG. 5 is engaged with the bottom wall of the spiral groove of the lower chopsticks half. The enlarged development of the spiral groove of the lower chopsticks shows the position of the inward projection of the upper chopsticks when the upper and lower chopsticks are joined together. . FIG. 8 is an enlarged longitudinal sectional view taken along line AA in FIG. 7. FIG. 6 is an enlarged longitudinal sectional view showing a part where a stopper is attached to the upper end of the upper half of the chopsticks in FIG. 5.

Explanation of symbols

1: Cylindrical chopstick upper half 1a: upper end 1b: lower end 2: tapered chopstick lower half 2a: upper end 2b: tapered end 3: plug body 4: large diameter for connection 4a: step 5: Spiral groove 5a: groove start end 5b: groove end 6: bottom wall 7: lower wall 10: inward protrusion

Claims (1)

  A pair of portable chopsticks, each chopstick having a cylindrical upper chopstick half (1) having a required length, a tapered lower chopstick half (2) accommodated therein, and a cylindrical shape It consists of a stopper (3) that covers the upper end (1a) of the upper chopsticks (1), and when the chopsticks are used, the lower chopsticks (2) is swung from the upper chopsticks half (1). In the portable chopsticks that are taken out and joined together to form one long chopstick, a cylindrical chopstick is placed on the upper end (2a) of the tapered lower chopstick half (2). A large connecting diameter portion (4) having an outer diameter slightly smaller than the inner diameter of the lower end portion (1b) of the upper half body (1) is provided, and a right-hand screw or a left-hand screw is provided on the outer peripheral surface of the large connecting diameter portion (4). A spiral groove (5) in the direction is provided, and the depth of the bottom wall (6) of the spiral groove (5) is from the start end (5a) opened downward from the lower edge of the connecting large diameter portion (4). The inner protrusion (10) that fits into the spiral groove (5) is provided on the inner surface of the cylindrical chopstick upper half (1) near the lower end, gradually becoming shallower toward the end (5b). When using chopsticks, the lower half of chopsticks (2) is swung downward with respect to the upper half of cylindrical chopsticks (1), and the inside of the portion near the lower end of the upper half of cylindrical chopsticks (1) The protrusion (10) hits the lower chopstick lower half (2) and the upper diameter connecting portion (4) lower edge step (4a), then the upper chopstick half (1) and / or chopstick lower By rotating the half (2) clockwise or counterclockwise, the inward protrusion (10) of the upper half of the chopsticks (1) enters the spiral groove (5) from its starting end (5a), and By rotating the chopstick upper half (1) and / or the chopstick lower half (2) in the same direction, the inward protrusion (10) advances in the spiral groove (5), and finally the inward protrusion Start 10) The tip of chopsticks is engaged with the bottom wall (6) close to the groove end (5b), and the upper half of chopsticks (1) and the lower half of chopsticks (2) are joined together. By rotating the upper half of the chopsticks (1) and / or the lower half of the chopsticks (2) in the opposite direction, the tip of the inward protrusion (10) and the bottom wall (6) of the spiral groove (5) ), The inward protrusion (10) advances in the spiral groove (5) in the opposite direction to the above, and finally the inward protrusion (10) protrudes from the groove start end (5a). The portable chopsticks are characterized in that the lower half of chopsticks (2) is placed inside the upper half of cylindrical chopsticks (1).

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