JP5228399B2 - One-touch opening carton - Google Patents

Description

  The present invention relates to a carton having a lid portion connected to a box through a hinge.

2. Description of the Related Art Conventionally, a carton 10 having a pivotable (openable and closable) lid 1 connected to a box 2 via a hinge H is known. For example, as shown in FIG. 21, a lid 1 is formed so as to cover an opening K of a box 2 containing contents, and the carton 10 for taking out the contents by lifting the lid 1 upward. Is mentioned.
When such a carton 10 is opened, the carton 10 is opened by directly picking up the tip of the lid 1 and lifting it upward. After taking out the contents, the lid 1 is moved downward again. The carton 10 is opened and closed by a series of closing operations (for example, Patent Document 1).

JP 2000-142665 A

  However, the opening and closing operation of this kind of carton 10 has become common sense that the operation of opening and closing the lid 1 by picking up the lid 1 by hand, and the opening operation of the carton 10 is not fun and innovative. There is something lacking. For this reason, when opening the cover part 1, the device inside the cover part 1 pops out, etc., and the device which pursues a novel idea for opening operation of the cover part 1 is made | formed.

  In the present invention, by fundamentally reviewing the opening mechanism of the lid 1 of the carton 10, it is novel as compared with the conventional method of opening the lid 1, and furthermore, the lid is opened by a simple pushing operation. It is an object to provide a one-touch opening carton 10 capable of opening one.

Accordingly, in order to solve these problems, the invention according to claim 1 of the present invention is a carton in which a rear surface and a lid portion are connected to a box body via a hinge, and the upper surface of the box body from the lid portion. A movable surface is extended over a position overlapping with the back surface side, and a convex flap that can be raised from a lower surface of the box via a broken line is provided, and the convex flap includes the movable surface. A carton in which a substantially seesaw-shaped insulator composed of the movable surface and the fulcrum is formed by forming a fulcrum that contacts the center of a portion of the box that overlaps the back side of the upper surface of the box, and the movable By depressing one end portion of the surface, the other end portion of the movable surface is raised through the fulcrum, and the lid portion is lifted from the hinge side as the other end portion of the movable surface rises. The hinge The lid portion is rotated in, characterized by opening the lid, a one-touch opening carton.

According to a second aspect of the present invention, by engaging the movable surface and the convex flap of the box at the fulcrum, the fulcrum of the movable surface is fixed and the lid portion is reliably opened and closed. It is a one-touch opening carton characterized by performing.

The invention of claim 3, wherein the at the fulcrum, the engagement between the convex flaps of the box body and the movable surface is to engage holes formed in the movable surface, the convex portion formed on the convex flap It is a one-touch opening carton characterized by inserting and engaging.

  The invention according to claim 4 is a one-touch opening carton characterized by having a latching portion capable of reclosing the lid portion to the box.

  According to a fifth aspect of the present invention, the latching portion comprises a latching groove formed on the movable surface and a latching piece formed on the lid, and the latching groove is the movable surface. The one-touch opening carton is characterized in that when the lid portion is formed, the lid portion is automatically unlocked when the lid portion is opened.

  The invention according to claim 6 is the one-touch opening carton, wherein the carton is composed of one sheet.

According to the first aspect of the present invention, in the carton in which the rear surface and the lid portion are connected to the box body via the hinge, the carton extends from the lid portion to a position overlapping the back surface side of the upper surface of the box body. The movable surface is extended, and a convex flap that can be raised from a lower surface of the box via a broken line is provided, and the convex flap has a back surface side of the upper surface of the box among the movable surfaces A carton in which a substantially seesaw-shaped insulator is formed by the movable surface and the fulcrum by forming a fulcrum that makes contact with the center of the portion that overlaps with the center, and depresses one end portion of the movable surface Thus, the other end portion of the movable surface is raised through the fulcrum, and the lid portion is lifted from the hinge side as the other end portion of the movable surface is raised, so that the lid is pivoted about the hinge. The part rotates and the lid part Because characterized by sealing, by pressing a portion of the carton, a configuration in which the lid portion is opened by rotating upward. Therefore, unlike a conventional carton configuration in which the lid is pinched by hand, it is possible to provide a carton that can be opened with one touch by pressing a push button.

According to a second aspect of the present invention, by engaging the movable surface and the convex flap of the box at the fulcrum, the fulcrum of the movable surface is fixed and the lid portion is reliably opened and closed. It is possible to do.

The invention of claim 3, wherein the at the fulcrum, the engagement between the convex flaps of the box body and the movable surface is to engage holes formed in the movable surface, the convex portion formed on the convex flap With the simple structure characterized by inserting and engaging, the fulcrum of the movable surface can be fixed and the lid can be opened and closed reliably.

  In addition, the invention according to claim 4 is characterized in that the lid portion has a latching portion that can be reclosed to the box, so that the lid portion can be opened with one touch by pressing the push button. In addition, it is possible to provide a one-touch opening carton capable of reclosing the lid portion into a box.

  According to a fifth aspect of the present invention, the latching portion comprises a latching groove formed on the movable surface and a latching piece formed on the lid, and the latching groove is the movable surface. It is possible to automatically unlock the lid by only opening the lid.

  Further, the invention according to claim 6 is characterized in that the carton is composed of a single sheet, so that a carton capable of opening the lid portion with one touch can be formed from a single sheet without using a plurality of parts. It is possible to provide.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1A, a carton 10 as an example of the one-touch opening carton 10 (carton 10) of the present invention is in a sealed state in which the lid portion 1 of the carton 10 covers the opening K of the carton box 2. Then, when the push button 3 of the carton 10 is pushed, as shown in FIG. 1 (b), the lid 1 rotates around the hinge H to be opened.

  Therefore, unlike the conventional carton that lifts and opens the lid portion 1 while being held, the lid portion 1 is suddenly lifted and opened by the operation of pressing the push button 3 formed on a part of the carton 10. It can give consumers surprise and novelty. Further, the carton 10 can be opened with one touch by a simple operation by simply pressing the button 3.

The configuration of the carton 10 of the present invention will be described below.
As an example of the carton 10 according to the present invention, as shown in FIG. 2, a flat blank 20 made of a single sheet is folded and bonded, which will be described later, to form a lid made of a box 2 and a lid 1. It is possible to form a carton 10 that can open the part 1 with one touch. It should be noted that the hatched portion shown in the blank 20 indicates a bonding location, and the dotted hatched portion indicates a bonding location on the back surface.

First, in detail, in the blank 20, the upper and lower front and rear surfaces (11, 13, 12, and 14) that form the box 2 of the carton 10 are connected in a vertical row, and among these , the upper and lower three surfaces Side flaps 15 are further provided from left to right, and convex flaps 30 are provided from left to right from the bottom . The upper surface 11 is formed with a substantially rectangular opening K for taking out contents, and a circular hole P is formed in the upper portion (front portion) of the upper surface 11 from the upper surface 11 to the front surface 12. Has been. Further, a hinge bonding surface 16 is extended from a lower part (rear part) of the upper surface 11 via a crease.

In particular, the substantially central portion of the convex flap 30 which is continuously provided from the left and right sides of the lower surface 13 is formed in a convex shape 32 (projecting portions 32), the convex portion 32 of the convex flap 30 as a fulcrum T, The insulator which consists of a seesaw shape in which one end and the other end of the movable surface 50C, which will be described later, alternately move up and down, is formed.

Next, the cover part 1 of the carton 10 and the movable surface 50 for opening the cover part 1 in the blank 20 will be described.
A lid surface 19 is further extended from the rear surface 14 of the blank 20 constituting the box 2. A movable surface 50 composed of a plurality of surfaces is further extended from the tip of the lid surface 19.
The movable surface 50 includes a lid movable surface 50A (movable surface 50A) that is bonded to the back side of the lid surface 19, a hinge movable surface 50B (movable surface 50B) that is connected to the movable surface 50A, and the movable surface. A box movable surface 50C (movable surface 50C) further provided continuously from 50B extends vertically in a line.

A hole P having substantially the same shape as the circular hole P formed in the box is formed at a location where the movable surface 50A and the lid surface 19 are in contact with each other.
Further, the movable surface 50C is formed with an opening K having substantially the same shape as the opening K formed on the upper surface 11 of the box 2, and flaps 52 are provided on the left and right sides and the upper side of the movable surface 50C, respectively. Has been.

  From such a blank 20, a carton box 2 and a lid 1 covering the box 2, which will be described later, are formed, and the lid 1 can be opened with one touch by the movable surface. It is possible.

Next, a method and a structure for forming the three-dimensional carton 10 that can be opened with a single touch by folding each surface of the blank 20 and bonding them at predetermined locations will be described.
First, as shown in FIG. 3A, the movable surface 50A of the blank 20 is folded to the back side of the lid surface 19 along the crease, and the lid surface 19 and the movable surface 50A are bonded together to cover the lid portion. 1 is formed.

Next, as shown in FIG. 3 (b), the front face 12 of the box body 2, folding along the Orikei in contact with the lower surface 13, a hinge lamination surface 16 formed on the upper surface 11, the lid surface 19 Pasted to the part directly above the hinge H.

Next, as shown in FIG. 4 (a), the upper and lower front and rear surfaces (11, 13 , 12 , 14) of the box 2 are raised upward, and the cylindrical shape is changed as shown in FIG. 4 (b). after forming, the convex flap 30 continuously provided on the lower surface 13 fold is raised upward, then folding the flaps 52 provided continuously to the left and right movable surface 50C downward.

  Finally, as shown in FIG. 5 (a), the side flaps 15 connected to the left and right sides of the front surface 12 and the rear surface 14 of the box 2 are folded inward, and then the upper surface 11 of the box 2 is The side flaps 15 connected to the left and right are folded downward, and the side flaps 15 of the upper surface 11 are bonded to the side flaps 15 of the front surface 12 and the rear surface 14. In this way, as shown in FIG. 5B, the carton 10 of the present invention can be formed.

The carton 10 formed in this way has an opening K for taking out the contents on the upper surface 11 of the box 2 of the carton 10, and at a location that coincides with the opening K of the upper surface 11, It is formed so that the opening K is located.
Further, a circular hole P is formed in front of the box body 2 from the front surface 12 and the upper surface 11, and a part of the movable surface 50 </ b> C is exposed from the hole P. The exposed movable surface 50C portion is particularly referred to as a push button 3. The push button 3 has a configuration in which the push button 3 is lowered when the lid 1 is opened, and the push button 3 is lifted upward when the lid 1 is closed.

  Next, an opening mechanism of the lid 1 will be described in which the lid 1 is rotated about the hinge H to be opened by pressing the push button 3 of the carton 10.

First, when the lid 1 of the carton 10 is closed, the movable surface 50 inside the carton is inclined diagonally from the push button 3 in front of the movable surface 50C to the rear as shown in FIGS. 6 (a) and 6 (b). It is in a tilted state. That is, the movable surface 50C in the rear portion is inclined along the inclined portion of the convex flap 30 from the convex portion 32 of the convex flap 30 in contact with the substantially central portion of the movable surface 50C. The push button 3 is exposed from the hole P of the box body 2 with the movable surface 50 </ b> C forward from the portion 32 rising.
Therefore, the lid 1 is in a closed state, and the state in which the lid is thus closed is defined as an initial state. Hereafter, FIG. 6B to FIG. 8B show “A cut surface-B direction view” in the carton of FIG.

Then, when one end (push button 3) of the movable surface 50C is pressed downward from this initial state (sealed state), as shown in FIGS. In addition to being in contact with the convex portion 32 of the convex flap 30, the rear portion (the other end) of the movable surface 50C is lifted upward with the convex portion 32 as a fulcrum T.
That is, a lever is formed with the convex portion 32 of the convex flap 30 as a fulcrum, the push button 3 of the movable surface C as a force point, and the rear portion of the movable surface C as an action point.
Therefore, it is possible to lift the rear part by pushing down the front part of the movable surface C using the principle of the lever.

Furthermore, the rear portion of the rising movable surface C and the lid portion 1 are connected via the hinge movable surface 50B. In particular, the hinge movable surface B is slightly smaller than the hinge portion of the lid portion 1. It extends from above.
Therefore, as the movable surface C rises, the hinge movable surface B is lifted, and the hinge movable surface B pushes up a slightly upper part of the hinge of the lid.
Therefore, the lid portion 1 is rotated about the hinge when the upper portion of the hinge H is pushed up.

  Then, as shown in FIGS. 8A and 8B, as the push button 3 is further pressed, the rear portion of the movable surface 50C is further raised with the convex portion 32 of the convex flap 30 as a fulcrum, and the movable surface 50B is By pushing up above the hinge H of the lid 1 via the lid 1, the lid 1 rotates around the hinge H and opens.

In this way, a part of the movable surface 50C and the convex portion 32 (fulcrum T) of the convex flap 30 are in contact with each other to form a seesaw-shaped insulator,
(1) Press one end (push button 3) of the movable surface 50C.
(2) The other end of the movable surface 50C rises with the convex portion 32 of the convex flap 30 as a fulcrum T.
(3) The hinge upper portion of the lid portion 1 is lifted through the movable surface 50B that connects the other end of the movable surface 50C and the hinge upper portion of the lid portion.
(4) The lid 1 rotates around the hinge H.
By these steps, it is possible to open the carton with one touch.

  That is, the carton of the present invention uses the lever principle to change the downward movement (pressing the push button) to the upward movement through the fulcrum T, and further to the upward movement. It is the structure which unseal | opens the cover part 1 by changing into a rotational motion via a rotating shaft (hinge).

  Further, using a simple model, as shown in FIG. 9, first, one end (push button 3) of the movable surface 50C is pressed downward (F1), so that the substantially central portion of the movable surface C is convex. The fulcrum T (convex portion 32) of the flap 30 is in contact with the movable surface C and the fulcrum T to form a seesaw-shaped insulator.

Then, as shown in FIG. 10, by pressing one end (push button 3) of the movable surface 50C further downward (F1), the convex portion 32 of the convex flap 30 is the fulcrum T, and the other end of the movable surface 50C. (Hinge H direction) rises. That is, the relational expression of F1 · R1 = F2 · R2 is established according to the principle of the lever, and a force (F2 = F1 · R2 / R1) for pushing the other end of the movable surface C upward is generated. Then, the force F2 that pushes up the other end of the movable surface C pushes up the portion separated from the hinge H of the lid portion by the distance R3 via the movable surface 50B.
Therefore, a rotational moment G = R3 · F2 that rotates the lid 1 about the hinge H as a rotation axis is generated at a position where the movable surface 50B and the lid 1 are in contact with each other, and the lid 1 rotates around the hinge portion H as the rotation axis. Will move.

  Then, as shown in FIG. 11, as the push button 3 is further pressed (F1), the movable surface B is pushed up via the fulcrum T (F2), and the movable surface B pushes up the hinge upper portion of the lid 1. Thus, the rotational moment G is generated in the lid 1 around the hinge H as the rotation axis, and the lid 1 is opened.

  As described above, the one-touch opening carton of the present invention can be easily opened by rotating the lid 1 through the movable surface 50 by a simple one-touch operation of pressing the push button 3. is there. That is, using the lever principle formed by the movable surface C and the fulcrum T, it is possible to change the vertical motion of the movable surface 50C to the rotational motion of the lid 1 about the hinge H. With a very simple configuration, the lid 1 of the carton 10 can be opened with one touch.

Below, the Example as an example of the one-touch opening carton 10 of this invention is described.
Example 1
In addition to the above configuration, the one-touch opening carton 10 of the present invention may be provided with a hooking portion that can hook the lid portion 1 to the box body 2, and the lid portion 1 of the carton can be reclosed.

  In this case, as shown in FIG. 12, the blank 70 of the carton 10 is extended from the latching groove 6 in which one end portion of the movable surface 50C is cut out and the hole P between the lid surface 19 and the movable surface 50A. The latching portions 6 and 7 including the latching pieces 7 are formed. As a result, the latching piece 7 of the lid 1 of the carton, which will be described later, is latched on the latching groove 6 of the box 2 and the lid 1 is locked to the box 2 (reclosed). It is possible.

Further, while extending the engagement piece 17 formed on the side surface flaps 15 extended in the right and left of the upper surface 11 of a substantially rhombic shape, the engaging groove fold line located between the lower surface 13 and a convex flap 30 18 When the carton is assembled as will be described later, the three-dimensional box 2 can be assembled without applying glue or the like by engaging the engaging piece 17 with the engaging groove 18. .

Below, the method of forming the one-touch opening carton 10 which can reclose the cover part 1 from such a blank 70 is demonstrated.
First, as shown in FIG. 13A, the movable surface 50A of the blank 20 is folded into the back side of the lid surface 19 along the folding line. And as shown in FIG.13 (b), the front surface 12 of the box 2 is folded above the movable surface 50C, and the hinge bonding surface 16 extended from the upper surface 11 is affixed on the part directly above the hinge H. Match.

Next, as shown in FIG. 14 (a), the upper and lower front and rear surfaces (11, 13 , 12 , 14) of the box 2 are respectively raised upward, and as shown in FIG. after forming the sleeve, the convex flap 30 continuously provided on the lower surface 13 fold is raised upward, folding the flaps 52 provided continuously to the left and right movable surface 50C downward.

  Finally, as shown in FIG. 15 (a), the side flaps 15 connected to the left and right sides of the front surface 12 and the rear surface 14 of the box 2 are folded inward, and then the upper surface 11 of the box 2 is The side flaps 15 provided to the left and right are folded downward and the engagement pieces 17 are folded, and the engagement pieces 17 are inserted into the engagement grooves 18 formed in the convex flaps.

  In this way, as shown in FIG. 15B, the carton 10 of the present invention can be formed. When the lid 1 is closed, the carton 10 hooks the latching piece 7 formed at the tip of the lid onto the latching groove 6 formed on the upper surface of the push button 3 of the box 2. By stopping, it is possible to lock the lid 1 to the box 2 as shown in FIG.

  In particular, by forming the locking groove 6 in the push button 3, the latch piece 7 of the lid portion is gradually exposed as the push button 3 is depressed, and the lock of the lid portion 1 is released. . Therefore, it is possible to automatically unlock the lid 1 only by opening the lid 1. Further, since the latching piece 7 is maintained in a folded state, and the lid 7 is automatically inserted into the latching groove 6 when the lid is closed, the lid 1 is automatically locked. Is possible.

  As described above, the one-touch opening carton 10 of the present invention can easily open the lid portion 1 as shown in FIG. 17A by a simple one-touch operation of pressing the push button 3. Furthermore, the lid 1 is reclosed to the box 2 as shown in FIG. 17 (b) by a simple configuration in which the hooks 6 and 7 are formed on the lid 1 and the box 2. Is possible. Furthermore, the lid 1 can be unlocked only by opening the lid 1 and the lid can be automatically locked when the lid is closed.

(Example 2)
In the one-touch opening carton 10 according to the present invention, the fulcrum portion T of the movable surface 50C and the convex flap 30 may be engaged with each other in order to more reliably move the movable surface up and down, thereby opening and closing the lid 1. Accordingly, it is possible to prevent the fulcrum portion T between the movable surface 50C and the convex flap 30 from being displaced, and to move the movable surface 50C up and down constantly and reliably.

As an example of the blank 70 in this case, as shown in FIG. 18, a vertically long engagement hole 31 is formed at a position where the movable surface 50 </ b> C and the flaps 52 connected to the left and right of the movable surface 50 </ b> C contact each other. A convex portion 32 (fulcrum) having a further protruding shape is formed on the convex flap 30 at a location which is a blank and is in contact with the engagement hole 31.
Thereby, since the fulcrum portion T between the movable surface 50C and the convex flap 30 is fixed by inserting and engaging the convex portion 32 into the engagement hole 31, which will be described later, the movable surface and the convex flap. And the vertical movement of the movable surface 50C can be reliably performed.

Then, such a blank 70 is folded and pasted to form a sleeve-like carton as shown in FIG. 19 (a), and then the convex flap 30 is folded as shown in FIG. 19 (b). The convex portion 32 of the convex flap 30 is inserted into the engagement hole 31 of the movable surface 50C, and the movable surface 50C and the convex flap 30 are engaged with each other.
And it is possible to form the carton 10 of the present invention by folding the side flaps 15 and 15 together.

  In particular, by engaging and fixing the fulcrum portion T between the movable surface 50C and the convex flap 30, the fulcrum T is pivoted as shown in FIGS. 20A and 20B when the lid 1 is opened and closed. As described above, the vertical movement of the movable surface can be reliably performed, and further, the wear of the convex portion 32 of the convex flap 30 and the position of the fulcrum T can be prevented from being displaced due to multiple opening and closing. Is possible. Therefore, even if the carton is formed from a paper-based blank, it is possible to form the one-touch opening carton 10 having high strength that can withstand multiple uses.

  As described above, the one-touch opening carton 10 according to the present invention can easily open the lid 1 by a simple one-touch operation of pressing the push button 3, and further, the movable surface 50C and the convex By fixing the fulcrum T with the flap 30, it is possible to reliably move the movable surface 50C up and down.

  In the above example, the one-touch opening carton 10 of the present invention has shown an example in which a carton is formed from one blank, but the lid 1, the box 2, the movable surface 50, and the fulcrum T are different parts. It may be formed in combination, if there is a configuration that can move up and down the one end and the other end of the movable surface by the principle of leverage, and a configuration that can rotate the lid portion through the hinge up and down movement of the movable surface, The configuration and formation method of the carton are not limited.

  Furthermore, since the one-touch opening carton of the present invention can be formed from one sheet, the one-touch opening carton can be easily formed at low cost.

  The one-touch opening carton of the present invention is not limited to a paper sheet, and a film such as a polypropylene film, a polyester film, a polyamide film, or a polycarbonate film may be used.

  As described above, in the one-touch opening carton 10 according to the present invention, the downward force F1 for pressing the push button 3 is changed to the upward force F2 via the convex portion (fulcrum T) of the convex flap. After this, the upward force F2 is further changed to a rotational force G through the hinge H of the lid, so that the lid 1 can be opened with one touch. .

It is a figure which shows the one-touch opening carton of this invention. (A) It is a figure which shows the time of sealing. (B) It is a figure which shows the time of opening. It is a top view which shows the blank of the carton of this invention. (A) (b) It is explanatory drawing which shows a mode that the carton of this invention is assembled. (A) (b) It is explanatory drawing which shows a mode that the carton of this invention is assembled. (A) (b) It is explanatory drawing which shows a mode that the carton of this invention is assembled. (A) (b) It is explanatory drawing which shows the opening mechanism of a cover part. (A) (b) It is explanatory drawing which shows the opening mechanism of a cover part. (A) (b) It is explanatory drawing which shows the opening mechanism of a cover part. It is a model figure which shows the opening mechanism of a cover part. It is a model figure which shows the opening mechanism of a cover part. It is a model figure which shows the opening mechanism of a cover part. It is a blank figure which shows another example of the carton of this invention. (A) (b) It is explanatory drawing which shows a mode that the carton of this invention is assembled. (A) (b) It is explanatory drawing which shows a mode that the carton of this invention is assembled. (A) (b) It is explanatory drawing which shows a mode that the carton of this invention is assembled. (A) (b) It is explanatory drawing which shows the case where the cover part of a carton is locked to the box. It is a figure which shows the carton of this invention. (A) It is a figure which shows the time of opening of a carton. (B) It is a figure which shows the time of sealing of a carton. It is a blank figure which shows another example of the carton of this invention. (A) (b) It is explanatory drawing which shows an example which assembles the carton of this invention. (A) (b) It is explanatory drawing which shows the opening / closing seal | sticker of a cover part. It is a figure which shows the conventional carton.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover part 2 Box 3 Push button 6 Latch groove 7 Latch piece 10 One-touch opening carton (carton)
DESCRIPTION OF SYMBOLS 11 Upper surface 12 Front surface 13 Lower surface 14 Rear surface 15 Side flap 16 Hinge bonding part 17 Engagement piece 18 Engagement groove 19 Cover surface 20 Blank 30 Convex flap 31 Engagement hole 32 Convex part (fulcrum)
50 Movable surface 50A Lid movable surface (movable surface)
50B Hinge movable surface (movable surface)
50C Box movable surface (movable surface)
52 flap 70 blank K opening P hole H hinge (rotating shaft)
T fulcrum

Claims (6)

In a carton in which a rear surface and a lid are connected to a box via a hinge, a movable surface extends from the lid to a position overlapping the back side of the upper surface of the box, and the lower surface of the box convex flap that can launch via a line provided from the convex flap abutting fulcrum in the center portion having a position overlapping the rear surface side of the upper surface of the box body of said movable surface A carton in which a substantially seesaw-shaped insulator composed of the movable surface and the fulcrum is formed, and by pressing one end of the movable surface, the other of the movable surface is interposed via the fulcrum. The end portion is raised, and the lid portion is lifted from the hinge side with the rise of the other end portion of the movable surface, whereby the lid portion rotates around the hinge to open the lid portion. One-touch feature Sealed carton. 2. The lid portion is reliably opened and closed by engaging the movable surface and the convex flap of the box at the fulcrum to fix the fulcrum of the movable surface. One-touch opening carton described. In the fulcrum, the engagement between the convex flaps of the box body and the movable surface, characterized in that to the engagement holes formed in the movable surface, engaged by inserting the convex portion formed on the convex flap The one-touch opening carton according to claim 2.   The one-touch opening carton according to any one of claims 1 to 3, further comprising a latching portion capable of reclosing the lid portion to the box.   The latching portion is composed of a latching groove formed on the movable surface and a latching piece formed on the lid, and the latching groove is formed at a pressed position of the movable surface, The one-touch opening carton according to claim 4, wherein the lid is automatically unlocked as the lid is opened.   The one-touch opening carton according to any one of claims 1 to 5, wherein the carton is composed of one sheet.

Images