JP3205007U - Back closure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back opening / closing tool that requires both opening and closing depending on the use situation and where both sides are required. In an opening / closing device for a bag-like bag 30 in which an opening 32 is opened by separating a pair of parallel edges 33, each edge 33 can be attached and detached by elastic deformation. When the opening / closing tool 1 with a magnet to be gripped is mounted and the pair of edge portions 33 are brought close to each other, the two opening / closing tools 1 are brought into close contact with each other by the attractive force between the magnets 5 and the opening 32 is closed. A back opening / closing tool characterized in that when the pair of edge portions 33 are separated from each other against the suction force between the two opening / closing devices, the two opening / closing tools 1 are released from contact with each other and the opening 32 is opened. is there. [Selection] Figure 2

Description

  The present invention relates to an opening / closing tool that is attached to various bag-like bags such as a shopping bag, a container bag, or a handbag or a shoulder bag in which an opening is opened by separating a pair of parallel edges.

  The size of the bag-shaped bag varies widely, but the general manufacturing process for bag-shaped bags is to make two sides of a sheet, such as two pieces of cloth or leather, in close contact with each other. Are joined to each other by sewing or the like, and an opening for taking in and out the article is formed at the remaining edge of one side. The opening is a portion where the edges of the two planar bodies are opened in parallel. In the case where the bottom is a circular, elliptical or trapezoidal bag, the peripheral edge is joined in accordance with each shape, but the shape of the opening is the same as that of the square bag.

  Conventional open / close tools that are conventionally attached to the bag include a zipper, fastener, button, or knot. These opening / closing tools are mounted in advance during the manufacturing process of the bag. However, there are many bags that are not equipped with an opening / closing tool from the beginning, for example, bags that prioritize convenience such as shopping bags and baggage bags.

  As described above, a bag that has not been equipped with an opening / closing tool from the beginning may require the opening / closing tool depending on the state of use. For example, when it is used with the opening being opened in order to prioritize the convenience of taking in and out, it is clear that there is no opening / closing tool that obstructs the taking in and out of objects. However, an opening that is closed by an opening / closing tool is preferable when it is necessary to transport the vehicle far away using a railway or other transportation means with an object in the bag, or when articles are likely to overflow from the bag. .

  However, a bag that is detachably mounted with a simple opening / closing tool that can quickly cope with such double-sided usage has not been known. Therefore, in order to solve such a problem, the present invention has an object to provide a bag equipped with a detachable and easy-to-use opening / closing tool.

In the bag-like bag in which the opening is opened by separating the pair of parallel edges,
Each edge is equipped with an opening / closing tool with a magnet for detachably holding the edge by elastic deformation,
When the pair of edges are brought close to each other, the two opening / closing tools are brought into close contact with each other by the attractive force between the magnets and the opening is closed, and when the pair of edges are separated from each other against the attractive force between the magnets from that state A back opening / closing tool characterized in that the two opening / closing tools are released from close contact and the opening is opened (Claim 1).

According to a second aspect of the present invention, in the first aspect of the present invention, the opening / closing tool has an elongated upper surface, an elastic vertical surface that is bent from one end portion in the width direction of the upper surface and extends at a right angle, and the width direction of the upper surface. An elastic inclined surface that is bent from the end and inclined in the direction of the vertical surface,
The front end portion of the elastic vertical surface and the front end portion of the elastic inclined surface are each bent outward, and are configured to detachably grip the edge of the back by elastic deformation between each bent portion. A magnet is attached (claim 2).

According to a third aspect of the present invention, in the first aspect of the present invention, the opening / closing tool includes a receiving portion and a slide portion provided inside the receiving portion, and the receiving portion approaches the upper surface and both ends in the width direction thereof. A pair of elastic inclined surfaces that are bent and extended, and each elastic inclined surface can be deformed in a direction away from each other by elasticity between each other, and a notch claw protruding inward is formed at each tip portion A magnet is attached to the outer surface of one elastic inclined surface,
The slide portion has a flat upper surface and a pair of elastic detachable portions that are bent and extended from both ends thereof, and a bulge that bulges outward at an intermediate portion from the upper surface side to the distal end portion side of each elastic detachable portion. Each of the elastic attachment / detachment portions is formed with an elongated guide hole from the bulging portion toward the distal end side, and the notch claw is guided by the guide hole. The part is formed with a detachable claw folded back inside,
When the notch claw of the receiving part is guided by the guide hole of the elastic attaching / detaching part, the slide part moves so that the upper surface of the sliding part approaches the upper surface of the receiving part. Each bulging part is configured to press each elastic inclined surface in the receiving part to separate each other, and by the reaction, the pair of attaching and detaching claws approach each other and press and hold the edge of the back from both sides. (Claim 3).

  According to a fourth aspect of the present invention, in the first aspect, the opening / closing tool includes an elastic disk body, and a half-moon-shaped kerf having an outer periphery around the periphery of the elastic disk body is formed inside the elastic disk body, A magnet is arranged inside the elastic disc body portion where no kerf is formed, and when the edge of the back is inserted into the kerf, both inner surfaces of the kerf are backed by the pressing force due to elastic deformation of the elastic disc body. It is comprised so that both surfaces of the edge part of this may be hold | gripped (Claim 4).

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, an insertion groove is formed in a portion of the elastic disk body where the kerf is not formed, and a magnet is disposed from the outside through the insertion groove inside the elastic disk body. It is comprised so that it can do (Claim 5).

  The first device is configured so that an opening / closing tool with a magnet can be detachably mounted. Since the opening / closing operation of the opening is only performed using the attractive force between the magnets provided on the opening / closing tool, the structure is simple, the size can be reduced, and the cost is advantageous. And according to the use condition in the bag which is not equipped with an opening / closing tool from the beginning, an opening / closing tool can be quickly and easily attached and used in a suitable state.

  The opening / closing tool in the second device is an elongated upper surface, an elastic vertical surface that is bent from one end portion in the width direction of the upper surface and extends at a right angle, and is bent from the other end portion in the width direction of the upper surface and is inclined in the vertical surface direction. An elastic inclined surface is provided, and the tip portion of the elastic vertical surface and the tip portion of the elastic inclined surface are each bent outward, and the edge of the back is detachably gripped by elastic deformation between the bent portions. The magnet is attached to the elastic vertical surface.

  The opening / closing tool configured as described above has a simple structure and can be easily attached / detached due to a gap expanding effect by the bent portion. Furthermore, when a gap is provided between the end of the elastic vertical surface and the end of the elastic inclined surface in the longitudinal direction of the upper surface, the gap is provided when the opening / closing tool is mounted on the edge of the opening of the back. The elastic vertical surface and the end portion of the elastic inclined surface which are formed are brought into contact with the edge of the back, and can be slid and mounted while being pushed obliquely from the edge. On the other hand, when detaching, it may be slid while being pulled out in the opposite direction. By adopting such a slide method, it is not necessary to apply an excessive force when attaching and detaching.

  The opening / closing tool in the third device is configured such that the upper surface of the slide portion approaches the upper surface of the receiving portion while the notch claw of the receiving portion is guided by the guide hole of the elastic attaching / detaching portion by inserting between the attaching / detaching claws into the edge of the back. At that time, each bulging part presses each elastic inclined surface in the receiving part to separate each other, and the reaction causes the detachable claws to approach each other and press the edge of the back from both sides. It is comprised so that it may hold | grip.

  If comprised in this way, an opening / closing tool will be automatically mounted | worn by the opening / closing part of a back | bag only by inserting between attachment / detachment nail | claws in the edge part of a back | bag from the direction perpendicular | vertical to the longitudinal direction. Further, when detaching, the opening / closing tool is automatically detached from the opening / closing portion of the bag by simply pulling the gap between the attaching / detaching claws from the edge of the bag in the direction perpendicular to the longitudinal direction.

  The opening / closing tool in the fourth device is provided with an elastic disk body, a half-moon-shaped kerf having an outer periphery around the periphery of the elastic disk body is formed inside the elastic disk body, and an elastic disk body part having no kerf formed therein. A magnet is arranged inside, and when the edge of the back is inserted into the groove, the inner surface of the groove is configured to grip both sides of the edge of the back by the pressing force due to elastic deformation of the elastic disc body. It is characterized by.

  If comprised in this way, an opening / closing tool will be automatically mounted | worn by the opening / closing part of a back | bag only by inserting a kerf into the edge part of a back | bag from the direction perpendicular | vertical to the longitudinal direction. Further, when detaching, the opening / closing tool is automatically detached from the opening / closing portion of the bag by simply pulling the gap between the attaching / detaching claws from the edge of the bag in the direction perpendicular to the longitudinal direction.

  According to a fifth aspect of the present invention, there is provided an opening / closing tool including the above-described elastic disk body, wherein an insertion groove is formed in a portion of the elastic disk body where the cut groove is not formed, and the magnet is externally inserted through the insertion groove. It is configured so that it can be placed inside the body.

  Forming the insertion groove facilitates magnet placement inside the elastic disk. In addition, when a through hole that penetrates the elastic disk body in a direction perpendicular to the surface is formed in the portion of the elastic disk body where the kerf is formed, the attachment / detachment direction of the opening / closing tool is clear by the formation of the through hole. become. Specifically, a portion close to the through-hole on the entire circumference of the elastic disk body is a portion to be brought close to the edge of the opening of the back when being attached or detached.

The perspective view (A) and sectional drawing (B) which show 1st Embodiment of the opening / closing tool attached or detached to the back | bag of this invention. The fragmentary perspective view of the back | bag which mounted | wore with the opening / closing tool shown in FIG. The perspective view (A) and sectional view (B) which show a 2nd embodiment of the opening-and-closing tool attached to and removed from the back of the present invention, and the partial sectional view (C) showing the state where it is attached to the back. The perspective view (A) which shows 3rd Embodiment of the opening / closing tool attached to the back of this invention, sectional drawing (B), and the fragmentary sectional view (C) which shows the state with which the back was mounted | worn.

  Next, based on the drawings, an optimal embodiment of a bag for detachably mounting an opening / closing tool in the present invention will be described. 1 and 2 show a first embodiment of the present invention. FIG. 1 (A) is a perspective view showing a pair of opening and closing tools, and FIG. 1 (B) is a cross-sectional view taken along line BB in FIG. 1 (A). FIG. 2 and FIG. 2 are partial perspective views showing an example of a bag equipped with the opening / closing tool shown in FIG.

  In FIG. 1 (A), a pair of opening / closing tool 1 has a symmetrical structure on the drawing. Each opening / closing tool 1 includes an elongated upper surface 2, an elastic vertical surface (vertical surface having elasticity) 3 that is bent from one end portion in the width direction on the upper surface and extends perpendicularly, and the other end portion in the width direction on the upper surface 2. And an elastic inclined surface (an inclined surface having elasticity) 4 that is bent from the vertical direction and has an elongated shape with a triangular cross section.

  The upper surface 2, the elastic vertical surface 3 and the elastic inclined surface 4 are integrally formed from, for example, an elastic plastic plate, metal plate or the like by molding or molding. The term “elasticity” in the present invention refers to the characteristic of bending like a leaf spring when stress is applied from the outside and returning to its original state when the stress is released (the same applies to other embodiments described later). .

  As shown in FIG. 1 (A), the front end of the elastic vertical surface 3 and the front end of the elastic inclined surface 4 are each bent outward, and the edge of the back 30 described later between the bent lines in the bent portions 3a and 4a. When the portion 33 enters, the distance between the pair of bending lines is deformed and expanded by the stress, and the edge portion 33 of the back 30 is detachably gripped from both outer surfaces by the elastic force generated between them. ing. Two magnets 5 are attached to the outer surface of each elastic vertical surface 3. The magnet 5 is composed of a disk-like permanent magnet, and can be fixed to the outer surface of the elastic vertical surface 3 with the magnet 5 fixed to the adhesive sheet 5a in advance, for example, as shown in the figure. The magnetic force and the number of magnets 5 are selected based on the balance between the required attraction force at the back and the attraction force specific to the magnet 5.

A gap is provided between the end of the elastic vertical surface 3 and the end of the elastic inclined surface 4 in the longitudinal direction of the upper surface 2 (longitudinal direction of the elongated upper surface 2 in FIG. 1A). In the example of FIG. 1 (A), the end of the elastic inclined surface 4 on the front side in the longitudinal direction of the opening / closing tool 1 shown on the left side is shorter than the elastic vertical surface 3, and the rear side of the opening / closing tool 1 shown on the right side in the longitudinal direction. The end of the elastic sloping surface 4 on the side is formed shorter than the elastic vertical surface 3, and a gap is formed due to the difference in length. If comprised in this way, when installing the opening / closing tool 1 in the edge 33 of the opening part 32 of the back | bag 30, as mentioned above, the edge part of the said elastic perpendicular | vertical surface 3 and the elastic inclined surface 4 in which the clearance gap was provided is provided. The portion can be attached by sliding it in contact with the edge 33 of the back 30 and pushing it in an oblique direction from the edge 33. On the other hand, when detaching, it may be slid while being pulled out in the opposite direction.
In FIG. 1A, the gap is provided only at the end portions on the same side of the elastic vertical surface 3 and the elastic inclined surface 4, but a gap may be provided at each of both end portions. In order to allow the opening / closing tool to slide, it is preferable to provide a gap, but it is not necessary to provide it.

  FIG. 1B shows a state in which one opening / closing tool 1 and the other opening / closing tool 1 (shown by a chain line) are brought into close contact with each other by the magnetic action of the magnet 5. When the pair of opening / closing tools 1 are brought into close contact with each other in this way, the two elastic vertical surfaces 3 are in a vertical state, and the two elastic inclined surfaces 4 are in an inclined state. Since the vertical state and the inclined state are the same even when the edge portion 31 of the back 30 is inserted between the two elastic vertical surfaces 3, the back 30 sandwiched between the two elastic vertical surfaces 3 in the vertical state. Both outer surfaces of the edge portion 33 are stably held in the vertical direction.

  FIG. 2 is a partial perspective view of the bag 30 equipped with the opening / closing tool 1 shown in FIG. The back 30 shown in the figure has two sheets of fabrics, leathers and other planar bodies 31 in close contact with each other, and the edges of the three sides are joined to each other by sewing or adhering, and the remaining one edge is opened. This is part 32. The opening 32 is a portion in which edges (strip-like strips having a width from the upper end to the dotted line) 33 of the two planar bodies 31 are opened in parallel to each other, and articles are put in and out of the opening 32.

  In the example of FIG. 2, loop-like hanging bands 34 are attached to the respective edge portions 33 of the opening 32 of the back 30, and the pair of opening / closing tools 1 can be attached to and detached from the intermediate portions of the respective hanging bands 34. It is attached to. In order to attach the opening / closing tool 1 to each edge portion 33, the lengths of the elastic vertical surface 3 and the elastic inclined surface 4 are set to each other with the two elastic vertical surfaces 3 to which the magnet 5 is fixed facing each other. A different part is brought into contact with the edge 33 of the back 30 and is slid in the direction of arrow S in FIG. When detaching, slide while pulling in the opposite direction.

  As shown in FIG. 2, the edge portion 33 of the back 30 on which the pair of opening / closing tools 1 are mounted is brought into close contact with each other by the mutual attractive force of the magnets 5 of the opening / closing tools 1 and closed. When opening the opening 32 from this state, the two edge portions 33 may be separated from each other against the attractive force of the magnet 5.

  FIG. 3 shows a second embodiment of the present invention. FIG. 3 (A) is a perspective view of the opening / closing tool 1, FIG. 3 (B) is a sectional view taken along the line BB in FIG. 3 (A), FIG. 3C is a cross-sectional view showing a state in which the opening / closing tool 1 of FIG.

  In FIG. 3 (A), a pair of opening / closing tool 1 is comprised left-right symmetrically on drawing, and is provided with the receiving part 6 and the slide part 7 provided in the inside, respectively. The receiving portion 6 has a flat upper surface 2 and a pair of elastic inclined surfaces 4 which are bent and extended in directions approaching each other from both ends thereof. Each elastic inclined surface 4 can be deformed in the outward direction away from each other by elasticity between each other, and two notch claws 8 projecting inward are formed at the respective tip portions, and the outer surface of one elastic inclined surface 4 The magnet 5 is attached to. Note that “inner side” means the inner side of the inner surface of the U-shaped cross section shown in FIG. 3A, and “outer side” means the outer side of the outer surface of the U-shaped cross section.

  As shown in FIG. 3B, the slide portion 7 has a flat upper surface 2 and a pair of elastic attachment / detachment portions 9 that are bent and extended from both ends in the width direction, and the upper surface 2 side of each elastic attachment / detachment portion 9. A bulging portion 10 that bulges outward is formed at an intermediate portion from the bulging portion 10 of each elastic detachable portion 9 toward the distal end portion side (the distal end portion side below the drawing in FIG. 3A). Two long and straight guide holes 11 are formed in parallel to each other, and the elastic attaching / detaching portion 9 is guided in a state where the notch claw 8 is inserted into the guide hole 11. Further, an attachment / detachment claw 12 that is folded inward is formed at the tip of each elastic attachment / detachment portion 9.

  FIG. 3B shows a state in which one opening / closing tool 1 and the other opening / closing tool 1 (shown by a chain line) are brought into close contact with each other by the magnetic action of the magnet 5. Thus, in a state where the pair of opening and closing tools 1 are in close contact with each other, the opposing elastic inclined surfaces 4 on the close contact side are in a vertical state. Such a state is the same even when the edge portion 33 of the back 30 is inserted between the two elastic inclined surfaces 4. Therefore, the edge portion 33 of the back 30 sandwiched between the two elastic inclined surfaces 4 in the vertical state. Both outer surfaces of are stably gripped in the vertical direction.

  Next, based on FIG.3 (C), the effect | action of each part at the time of mounting | wearing the edge part 33 of the bag 30 with the opening / closing tool 1 shown to FIG. 3 (A) is demonstrated. First, as in the case of FIG. 2 described above, the opening / closing tool 1 is lowered until it comes in contact with the tip of the edge 33 vertically from above as shown in the left side of FIG. As a result, the tip of the edge 33 passes between the pair of attachment / detachment claws 12.

  When the tip of the edge 33 reaches the inner surface of the upper surface 2 of the slide portion 7 and further presses the upper surface 2 from below, the slide portion 7 rises while sliding into the receiving portion 6 of the opening / closing tool 1. At that time, the two notch claws 8 of the receiving part 6 are respectively guided in the two guide holes 11 of the elastic attaching / detaching part 9. On the other hand, the outer surface of the bulging portion 10 formed on each elastic attaching / detaching portion 9 gradually expands while pressing the inner surface of the elastic inclined surface 4 of the receiving portion 6 in proportion to the slide distance. Then, each elastic attaching / detaching portion 9 is pushed back inward by the reaction, and thereby, the pair of attaching / detaching claws 12 formed at the distal end portion of each elastic attaching / detaching portion 9 is pressed from the outside toward the inside.

  Finally, the slide is completed in a state where the upper surface 2 of the slide portion 7 is in contact with the upper surface 2 of the receiving portion 6 as shown on the right side of FIG. In this state, both outer surfaces of the edge portion 33 of the back 30 are strongly pressed from the outside by the pair of attaching / detaching claws 12 to maintain a stable mounting state.

  When the opening / closing tool 1 is detached from the edge 33 from the state in which the opening / closing tool 1 is mounted on the edge 33 of the back 30 as shown in the right side of FIG. 3C, the receiving portion 6 of the opening / closing tool 1 is simply used. It is only necessary to pull upward. That is, when the receiving portion 6 is pulled away from the edge portion 33, the receiving portion 6 slides upward on the outside of the slide portion 7. Then, the state returns to the state shown on the left side of FIG. 3C, and the distance between the pair of attachment / detachment claws 12 that press the tip of the edge 33 from both outer surfaces is widened. You can leave.

  FIG. 4 is a view showing a third embodiment of the opening / closing tool to be attached to and detached from the bag according to the present invention. FIG. 4 (A) is a perspective view, FIG. 4 (B) is a sectional view, and FIG. FIG. 6 is a partial cross-sectional view showing a state in which the is mounted on the back 30.

  4A and 4B, each of the pair of opening / closing tools 1 includes a disk body having elasticity as a whole, that is, an elastic disk body 20 as a basic element. The elastic disc body 20 is made by molding, for example, an elastic rubber material or an elastic plastic material having a relatively high hardness.

  A cut groove 21 having flat inner surfaces is formed inside the elastic disk body 20. The kerf 21 is formed in a half-moon shape with a part of the peripheral edge of the elastic disk body as an outer periphery, and the linear portion 21a formed on the inner side becomes a receiving portion that receives the tip of the edge portion 33 in the back 30 to be inserted. A rectangular insertion groove 22 is formed on the opposite side of the cut groove 21 formed in the elastic disk body 20 in the radial direction, that is, on a part of the outer peripheral portion where the cut groove 21 is not formed. The insertion groove 22 is formed to insert the magnet 5 through the opening and place the magnet 5 at a predetermined position of the elastic disc body 20. The magnet 5 is fixed to the inner surface of the insertion groove 22 with an adhesive or the like attached to the surface thereof.

  A through hole 23 that penetrates in a direction perpendicular to the surface of the elastic disk body 20 is formed in a portion of the elastic disk body 20 where the kerf 21 is formed. The through-hole 23 is formed as necessary, and is used, for example, to clarify the attaching / detaching direction of the opening / closing tool 1 with respect to the edge 33 of the back 30. Specifically, a portion close to the through-hole 23 on the entire circumference of the elastic disc body 20 is a portion to be brought close to the edge portion 33 of the opening 32 of the back 30 when attaching and detaching. When molding the elastic disc body 20, the respective parts such as the cut groove 21, the insertion groove 22, and the through hole 23 can be integrally formed.

  FIG. 4B shows a state in which one opening / closing tool 1 and the other opening / closing tool 1 (shown by a chain line) are brought into close contact with each other by the magnetic force action of the magnet 5. Thus, in a state where the pair of opening / closing tools 1 are in close contact with each other, the two outer surfaces on the close contact side are in a vertical state. As shown in FIG. 4C, such a vertical state is the same even when both outer surfaces of the edge portion 33 of the back 30 are inserted between the two outer surfaces, and therefore, sandwiched between the two outer surfaces in the vertical state. Both outer surfaces of the edge portion 33 of the back 30 are stably held in the vertical direction.

  The opening / closing tool of the bag according to the present invention can be used as a bag requiring both sides when the opening / closing tool is not required and when required.

DESCRIPTION OF SYMBOLS 1 Opening / closing tool 2 Upper surface 3 Elastic vertical surface 3a Bending part 4 Elastic inclination surface 4a Bending part 5 Magnet 5a Adhesive sheet

6 receiving portion 7 slide portion 8 notch claw 9 elastic attaching / detaching portion 10 bulging portion 11 guide hole 12 attaching / detaching claw 20 elastic disc body

21 Cut groove 21a Straight line portion 22 Insertion groove 23 Through hole 30 Back 31 Planar body 32 Opening portion 33 Edge portion 34 Suspension band

Claims (5)

In the bag-like back (30) in which the opening (32) is opened by separating the pair of parallel edges (33),
Each edge (33) is equipped with an opening / closing tool (1) with a magnet for detachably holding the edge (33) by elastic deformation,
When the pair of edges (33) are brought close to each other, the two opening / closing tools (1) are brought into close contact with each other by the attractive force between the magnets (5), and the opening (32) is closed. The back of the bag is characterized in that when the pair of edges (33) are separated from each other against the suction force, the two opening / closing tools (1) are released from close contact and the opening (32) is opened. Opening and closing tool. The opening / closing tool (1) has an elongated upper surface (2), an elastic vertical surface (3) which is bent at one end in the width direction of the upper surface (2) and extends at a right angle, and the other end in the width direction of the upper surface (2). An elastic inclined surface (4) which is bent from the portion and is inclined in the vertical surface direction,
The front end portion of the elastic vertical surface (3) and the front end portion of the elastic inclined surface (4) are bent outward, and the edge of the back (30) is elastically deformed between the bent portions (3a) and (4a). The back opening / closing tool according to claim 1, characterized in that (33) is detachably gripped, and a magnet (5) is attached to the elastic vertical surface (3). The opening / closing tool (1) includes a receiving portion (6) and a slide portion (7) provided on the inside thereof.
The receiving part (6) has an upper surface (2) and a pair of elastic inclined surfaces (4) that are bent and extended in directions approaching from both ends in the width direction, and each elastic inclined surface (4) is Not only can they be deformed in directions away from each other due to the elasticity between each other, but a notch claw (8) projecting inward is formed at each tip, and a magnet (on the outer surface of one elastic inclined surface (4) 5) is attached,
The slide portion (7) has a flat upper surface (2) and a pair of elastic attachment / detachment portions (9) that are bent and extended from both ends thereof, and the distal end from the upper surface (2) side of each elastic attachment / detachment portion (9). A bulging portion (10) that bulges outward is formed in the intermediate portion toward the portion side, and an elongated guide hole (11) extends from the bulging portion (10) of each elastic detachable portion (9) toward the distal end portion side. The notch claw (8) is configured to be guided by the guide hole (11), and an attachment / detachment claw (12) folded inward is provided at the tip of each elastic attachment / detachment portion (9). Formed,
The notch claw (8) of the receiving part (6) is guided by the guide hole (11) of the elastic attaching / detaching part (9) by inserting between the attaching / detaching claw (12) into the edge part (33) of the back (30). However, the upper surface (2) of the slide portion (7) moves so as to approach the upper surface (2) of the receiving portion (6), and at this time, each bulging portion (10) is elastically inclined in the receiving portion (6). The surface (4) is pressed and separated from each other, and by the reaction, the pair of attachment / detachment claws (12) approach each other and press and hold the edge (33) of the back (30) from both sides. The back opening / closing tool according to claim 1, wherein:   The opening / closing tool (1) is provided with an elastic disc body (20), and a half-moon-shaped cut groove (21) having an outer periphery around the periphery of the elastic disc body (20) is formed inside the elastic disc body (20). When the magnet (5) is arranged inside the elastic disc body (20) portion where the groove (21) is not formed, and the edge (33) of the back (30) is inserted into the cut groove (21), The inner surface of the kerf (21) is configured to hold both surfaces of the edge (33) of the back (30) by a pressing force generated by elastic deformation of the elastic disk (20). The opening / closing tool of the back according to 1.   An insertion groove (22) is formed in a portion of the elastic disk body (20) where the cut groove (21) is not formed, and the magnet (5) is externally passed through the insertion groove (22) from the inside of the elastic disk body (20). The back opening / closing tool according to claim 4, wherein the back opening / closing tool is configured so as to be disposed on the back.

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