JP5716125B1 - School bag - Google Patents

Abstract

An object of the present invention is to make the volume flexible so that it can be compact when it is not carried on the back, and to protect the back of the child from an accident when the child falls. A frame including a connecting portion connecting a support column and a support column, and a bottom plate connected to the support column while connecting the support column at a lower portion, and a front plate mounted on the bottom plate and fixed to the front plate. 4, a main body 2 having a gusset 5 connecting the left and right ends of the front plate 3 and the back plate 4 and having an opening 8 in the upper part, a lid 15 for opening and closing the upper opening of the main part, and an upper end side It has a shoulder belt 16 that is connected to the upper part of the frame or the main body part and whose lower end is connected to the lower part of the frame or the main body part. It is composed of a free other side bottom plate 13b, the lid is extendable, the base end side is connected to the upper side of the back plate, the front end side is a free end and can be locked to the bottom plate, and the backpack belt is Telescopic. [Selection] Figure 1

Description

  The present invention relates to a school bag, and more particularly, to a school bag in which the capacity of a storage portion can be freely changed.

  A school bag represented by a school bag is generally attached to the body composed of a bottom plate and a large gusset that is connected to both ends of the bottom plate in the upward direction, and the back side of the body. Consists of a back plate and a front plate attached to the front side of the trunk, and includes a main housing portion having an opening in the upper portion, the main housing portion is provided with a lid for opening and closing the upper opening, A pair of shoulder belts are attached to the back plate.

  That is, FIG. 5 is a perspective view showing a general school bag 31, in which 33 is a trunk. The body portion 33 is composed of a bottom plate 34 and large gusset portions 35 connected to both ends of the bottom plate 34 in an upward direction. A back plate 36 is provided on the back side of the body portion 33. A front plate 37 is attached to the front side of the body portion 33, thereby constituting a main housing portion 32 having an upper portion as an opening.

  Further, a middle gusset portion 39 having a bottom portion is attached to the front side of the main housing portion 32, and a front plate 40 is attached to the front side of the middle gusset portion 39. The front plate 40 constitutes a front cylinder accommodating portion 38 having an upper portion as an opening.

  On the other hand, the main housing portion 32 is arranged so as to be openable and closable so as to cover from the upper opening of the main housing portion 32 to the upper opening of the torso front housing portion 38, and the lid 41 on the back plate 36 side. The proximal end is attached.

  A pair of shoulder belts 42 is attached to the back plate 36. That is, each of the pair of shoulder belts 42 has an upper end attached to the back plate 36 by a back ring 44 attached to an upper center portion of the back plate 36, and a lower end portion attached to the bottom plate 34, respectively. The lower belt 43 is rotatably attached to a so-called “daruma ring” (not shown).

JP 2001-286316 A

  By the way, in the conventional school bag comprised as mentioned above, since the magnitude | size of the main accommodating part was fixed and therefore the capacity | capacitance of the main accommodating part was not able to be changed, when there are few things to contain There was a problem that it was difficult to carry.

  That is, when there are few items such as textbooks, it has been pointed out that the textbooks swing in the school bag, making it difficult to carry the school bag. Especially in the lower grades of elementary school, less textbooks are used due to the less number of classes, so textbooks etc. often sway in the school bag. The school bag as a whole is larger than the size of the body, so if the textbooks swing in the school bag, the school bag becomes more difficult to carry and the burden on the child increases. .

  In addition, school bags are generally stored in predetermined shelves in the classroom, but it is pointed out that it is difficult to put school bags because these shelves have a smaller storage space than school bags. . In particular, in recent years, since elementary school began using A4 flat files, the school bag has become large enough to accommodate A4 flat files. It gets in the way and is hard to put in.

  Furthermore, with conventional school bags, the belt length is the same whether it is carried on the shoulder or removed from the shoulder and cannot be easily changed, and the belt is carried even after the school bag is removed from the shoulder. Since this is the same form as that of the case, it is pointed out that this also takes time to store.

  In other words, the conventional school bag is almost the same as the case of carrying the belt in a rounded shape after removing it from the shoulder. Since it must be put in the shelf while holding it down, it takes time to store it. When the shoulder belt is forcibly pushed into the shelf at the time of storage, the shoulder belt is damaged or the hanging tool attached to the shoulder belt is broken, and the repair is required. In particular, when the shoulder bag is attached to the school bag with the shoulder belt facing upward, the school bag cannot be stored in the shelf if it is not inserted properly. It is also conceivable that the connecting part between the back plate and the back plate will be broken.

  Also, when the school bag is placed on the floor, etc., it is the same as when the belt is carried in a rounded circle, so this belt part occupies more space than necessary. It was pointed out that the problem was.

  In addition, in the conventional school bag, there is no means to protect the back of the child carrying the child. There was also a situation that sometimes caused whiplash. In recent years, the number of falls that have been hit by bicycles has increased, so immediate measures are required, but no effective measures have been proposed in the past.

  Therefore, the present invention makes the volume variable according to the amount of the contents, and makes it compact when not carrying it, thereby facilitating storage on a shelf and occupying more space than necessary. In addition, it is an object of the present invention to provide a school bag that can prevent the child's back of the head from an unexpected accident when the child falls.

The school bag of the present invention
A frame comprising a pair of struts, a connecting portion that connects the pair of struts, and a bottom plate that is connected to one side of the strut while connecting the pair of struts at the lower portion;
A front plate, a back plate, and a pair of accordion-like gusset portions that connect the left and right end portions of the front plate and the back plate, mounted and fixed on the bottom plate of the frame, A main body having an opening;
A lid for opening and closing the upper opening of the main body,
The upper end side is connected to the upper part of the frame or the body part, the lower end side comprises a pair of shoulder belts connected to the lower part of the frame or the body part,
The gusset part is stretchable, the gusset width expands by applying force to the extension side, and the normal width is restored by releasing this force, while the gusset width is reduced by applying force to the contraction side, Restoring this force restores the normal width,
The bottom plate is composed of one side bottom plate and the other side bottom plate slidably connected to the one side bottom plate,
The lid is extendable and stretched by pulling out the tip, and restored to its original shape by releasing the pulling force, the base end side is connected to the upper side of the back plate, and the tip side is a free end It can be locked to the front plate or the bottom plate in an extended state, and when no force is applied, the upper opening of the main body is opened, and the main body is extended by pulling out the tip side. The upper opening of the part is to be closed,
The back belt is made of an elastic material such as rubber so that it can expand and contract, and is in contact with the back plate when no force is applied.

  In the school bag of the present invention, the gusset portion can be expanded and contracted, whereby the gusset width can be expanded and contracted, and the capacity of the main storage portion can be changed in accordance with the amount of the stored items. For this reason, it is possible to solve the problem that textbooks swing in the school bag when there are few items to be held, which makes it difficult to carry the school bag. Since it can be made compact, it can be easily stored on a shelf or the like.

  In addition, the back belt is made of elastic material such as rubber so that it can be extended and retracted. When no force is applied, the back belt is in contact with the back plate. There is no need to fold the bag with your hand, and you can save time and effort, and the belt on your back does not occupy more space when you are not carrying it.

  Furthermore, since the school bag of the present invention has a frame having a pair of struts and a connecting portion connecting the pair of struts, a child carrying the back falls by attaching a net to the frame. In some cases it is possible to protect the child's back of the head.

It is a perspective view of the Example of the school bag of this invention. It is an exploded view of the Example of the school bag of this invention. It is a figure for demonstrating the attachment method of the backpack belt in the Example of the school bag of this invention. It is a figure for demonstrating the baseplate in the Example of the school bag of this invention. It is a figure for demonstrating the conventional school bag.

  The school bag of the present invention has a frame, and the main body is placed and fixed on the frame. The frame has a pair of struts, a connecting portion that connects the pair of struts, and a bottom plate that is connected to one side of the strut while connecting the pair of struts at the lower portion. It comprises a side bottom plate and the other side bottom plate slidably connected to the one side bottom plate.

  Further, the main body is placed and fixed on the bottom plate of the frame, and the main body has a pair of accordion-like shapes that connect the front plate, the back plate, and the left and right end portions of the front plate and the back plate. It has a gusset part and has an opening in the upper part.

  And the gusset part which constitutes the main body part can be expanded and contracted, the gusset width is widened by applying a force to the extension side, the normal width is restored by releasing this force, while the force is applied to the contracting side In addition, the gusset width is reduced, and the normal width is restored by releasing this force.

  In addition, the school bag of the present invention has an extendable lid that opens and closes the opening at the top of the main body, and this lid extends when the tip is pulled out, and the original shape is released by releasing the pulling force. The base end side is connected to the upper side of the back plate, the front end side is a free end, and can be locked to the front plate or the bottom plate in an extended state. When no force is applied, the upper opening of the main body is opened, and when the distal end is pulled out and extended, the upper opening of the main body is closed.

  Furthermore, the school bag of the present invention has a pair of backpack belts, each of which has an upper end connected to the upper part of the frame or the main body, and a lower end of the lower part of the column in the frame. Or it is connected to the lower part of the main body. The shoulder belt is made of an elastic material such as rubber so that it can expand and contract, and abuts against the back plate when no force is applied.

  Here, the lid side connecting portion is provided at the front end portion of the lid, the body side connecting portion is connectable to the front plate or the bottom plate, and the lid side connecting portion is connected to the body side connecting portion. By doing so, the front end side of the lid may be locked to the front plate or the bottom plate. At this time, the lid side connecting portion is provided with a magnet or a magnetic body, and the main body side connecting portion is provided with a magnet provided with the lid side connecting portion or It is better to provide a magnet or magnetic body that can be attracted to the magnetic body, and to connect the lid side connecting portion and the main body side connecting portion by magnetic force, so that the front end side of the lid can be easily attached to the front plate or the bottom plate. It becomes possible to lock.

  Further, the connecting portion for connecting the pair of struts may be constituted by an upper connecting portion that connects the pair of struts at the upper portion and a lower connecting portion that connects the pair of struts at the lower portion. It can be firmly connected.

  At this time, it is preferable to provide a net in the upper connecting portion, so that when the child falls to the rear side carrying the school bag, the rear head of the child can be protected by the net.

  Furthermore, it is preferable that each of the pair of struts can be extended in the vertical direction. By extending the struts according to the growth of the child, the child's back of the head can be protected more reliably and the size of the frame can be increased. It is also possible to make the size suitable for the child's body shape.

  Furthermore, the upper portions of the pair of support columns may be foldable, and the storage can be facilitated by folding the upper portions of the support columns during storage.

  An embodiment of the school bag of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the front side of the school bag of the present embodiment, and FIG. 2 is one of members constituting the school bag of the present embodiment. FIG. 1 is an exploded view of a part, in which 1 is a school bag of the present embodiment.

  And the school bag 1 of a present Example has a main-body part, A textbook, a notebook, a pencil case, etc. can be accommodated in this main-body part. That is, in FIG. 2, reference numeral 2 denotes a main body. In this embodiment, the main body 2 includes a front plate 3, a back plate 4 having substantially the same shape and dimensions as the front plate 3, and the front plate 3 and the back plate. 4 is provided with a gusset portion 5 in which end portions on the left and right sides are connected to each other, and an opening 8 for taking in and out textbooks and the like is provided at the upper portion.

  In addition, the gusset portion 5 is accordion-shaped and is extendable. As a result, the gusseted portion expands the gusset width by applying a force toward the expansion side relative to the normal width when no force is applied, and is restored to the normal gusset width by releasing this force. On the other hand, the gusset width is reduced by applying a force to the shrinking side, and the normal gusset width is restored by releasing this force.

  In addition, the material of the said front board 3, the back board 4, and the gusset part 5 is not specifically limited, As long as it is a material which does not break easily, such as leather, synthetic leather, resin, cardboard, or these combination, any material But it ’s okay.

  Further, in this embodiment, the gusset portion 5 has a normal width of about 10 cm when no force is applied, and a maximum width of about 30 cm when the gusset width is widened by applying force to the extension side, The minimum width when the width of the gusset is reduced by applying a force to the side to be reduced is about several cm to 5 cm. However, it is not necessarily limited to this width. Therefore, the gusset width is widened by applying a force toward the expansion side with respect to the normal width when no force is applied, and the normal gusset width is restored by releasing this force, while the fold width is reduced. Any width may be used as long as the gusset width is reduced by applying force and the normal gusset width is restored by releasing the force.

  Next, 6 is a backrest part in the figure. That is, the school bag 1 of the present embodiment has a backrest portion 6 that has substantially the same shape and size as the back plate 4 and incorporates a cushion material such as sponge. The backrest 6 is attached to the outside of the back plate 4 and constitutes a part of the main body 2. However, the backrest portion 6 is not always necessary and may not be provided.

  In FIG. 1, 7 is a front tightening. That is, the school bag 1 of the present embodiment has a band-like front fastening 7 formed of an elastic material such as rubber, and the front fastening 7 is provided with a gusset portion on one side, a front plate, and the other side. The gusset portion is attached to the main body portion 2 so as to prevent the gusset width of the gusset portion 5 from extending more or less than necessary in the extension direction.

  Next, 9 is a frame in the figure. That is, the school bag 1 of the present embodiment has a frame 9, and the main body 2 is placed and fixed on the frame 9.

  Here, the frame 9 will be described. In the present embodiment, the frame 9 has a pair of support columns 10, each of which is a pipe made of a material such as metal, aluminum, or resin. It is composed.

  The upper portion of the support column 10 is provided with an upper connecting portion 11 that connects the support column 10 on the upper side in three upper and lower stages, and the upper connecting portion 11 includes an upper-side upper connecting portion 1101, The middle stage side upper coupling part 1102 and the lower stage side upper coupling part 1103 are configured. On the other hand, the lower part of the column is provided with a lower coupling part 12 that couples the column 10 on the lower side.

  Further, each of the columns 10 is extendable at two locations, and is between the upper stage upper connection part 1101 and the middle stage upper connection part 1102 and between the middle stage upper connection part 1102 and the lower stage upper connection part 1103. Accordingly, only the upper-stage upper coupling part 1101 and both the upper-stage upper coupling part 1101 and the middle-stage upper coupling part 1102 can be moved in the vertical direction at the same time. However, it is not always necessary to make the support column 10 telescopic.

  Further, instead of making the support column 10 extendable and retractable, both the upper stage upper connection part 1101 and the middle stage upper connection part 1102 and between the middle stage upper connection part 1102 and the lower stage side upper connection part 1103, or the upper stage The upper portion of the support column 10 may be foldable between the side upper connection part 1101 and the middle stage upper connection part 1102 and between the middle stage side upper connection part 1102 and the lower stage side upper connection part 1103.

  Next, the frame 9 has a bottom plate, and the main body 2 is placed and fixed on the bottom plate. That is, in the figure, reference numeral 13 denotes a bottom plate. In this embodiment, the bottom plate 13 is composed of one side bottom plate 13a and the other side bottom plate 13b, and the other side bottom plate 13b is slidably connected to the one side bottom plate 13a. Has been.

  Here, FIG. 4 is an exploded perspective view of the bottom plate 13. In the figure, one side bottom plate 13a has an insertion space 13c formed on the lower surface, while the other side bottom plate 13b can be inserted into the insertion space 13c. The other side bottom plate 13b is slidably inserted into the insertion space 13c, whereby the other side bottom plate 13b is slidably connected to the one side bottom plate 13a.

  The one-side bottom plate 13a is connected to the support column 10 in such a manner that the pair of support columns 10 are connected to each other at the lower portion. As a result, the frame 9 has a side surface shape of L by the support column 10 and the bottom plate 13. It has a letter shape.

  The main body 2 is mounted on the bottom plate 13, and the back plate 4 is fixed to the one side bottom plate 13a and the front plate 3 is fixed to the other side bottom plate 13b by an L-shaped metal fitting or the like. Thus, the main body 2 and the frame 9 are integrated. And thereby, the said baseplate 13 is making the length of the front-back direction changeable in the form linked with expansion and contraction of the gusset part 5.

  Next, in the figure, 13d is a handle. That is, in the school bag 1 of the present embodiment, the other side bottom plate 13c has a handle 13d. The handle 13d penetrates the front plate 3 and protrudes to the front side of the main body portion 2, and this handle 13d. By pulling out the gusset portion 5, the gusset width of the gusset portion 5 is widened, and by pushing the handle 13 d, the gusset width of the gusset portion 5 can be reduced. However, in the present invention, the handle 13c is not necessarily required and may not be provided.

  Further, as described above, in the present embodiment, the one side bottom plate 13a is connected to the support column 10 in such a manner that the pair of support columns 10 are connected to each other at the lower part, so that the support column 10 is connected at the lower part. The lower connecting portion 12 is not necessarily required, and the lower connecting portion 12 may not be provided.

  Next, there are 14 nets in the figure. That is, in the school bag 1 according to the present embodiment, the stretchable net 14 is stretched between the upper-stage upper coupling portion 1101 and the middle-stage upper coupling portion 1102, thereby the child carrying the school bag 1. This makes it possible to protect the back of the head when it falls to the rear, preventing children from being injured.

  That is, as described above, in the conventional school bag, there is no means for protecting the back of the child carrying the child's back. This could lead to injury or whiplash.

  However, in the school bag 1 of this embodiment, the net 14 is stretched at a location corresponding to the back of the head of the child when carrying it, so that the back of the head of the child can be protected when the child falls backward, It is possible to prevent injury.

  At this time, as described above, in the school bag 1 according to the present embodiment, the support column 10 is arranged between the upper-side upper connection part 1101 and the middle-stage upper connection part 1102 and between the middle-stage upper connection part 1102 and the lower-stage upper part. It is possible to expand and contract between the connecting portions 1103, and thereby, only the upper-stage upper connecting portion 1101 and both the upper-stage upper connecting portion 1101 and the middle-stage upper connecting portion 1102 can be moved in the vertical direction simultaneously. Therefore, by adjusting the positions of the upper side upper connecting part 1101 and the middle stage upper connecting part 1102, the position of the net 14 can be surely set to the position of the back of the child. And, this effect is that both the upper-stage upper connection part 1101 and the middle-stage upper connection part 1102 and between the middle-stage upper connection part 1102 and the lower-stage upper connection part 1103, instead of making the column 10 extendable and retractable, Or, when the upper part of the column 10 is foldable between the upper stage upper coupling part 1101 and the middle stage upper coupling part 1102 and between the middle stage upper coupling part 1102 and the lower stage upper coupling part 1103. But the same is true.

  In the present embodiment, the material of the frame 9 is not particularly limited, and may be made of metal as described above, or may be made of aluminum or resin. The material of the net 14 is not particularly limited, and any material can be used as long as it can protect the back of the child carrying the school bag 1, and it is more preferable that the net 14 can be stretched.

  Next, in the figure, 15 is a lid. That is, the school bag 1 of this embodiment has a lid 15, and the lid 15 opens and closes the opening at the top of the main body 2.

  Here, the lid 15 will be described. In FIG. 2, the lid 15 includes a sheet-like lid body 1501 that opens and closes the upper opening 8 of the body portion 2, and a support portion that supports the base end side of the lid body 1501. 1502. And by attaching the support part 1502 to the upper part of the back surface of the back plate 4, the base end side is connected to the upper side of the back plate 4, and the front end part of the lid body 1501 is a free end.

  Further, in this embodiment, the lid body 1501 is extendable and retractable, expands by pulling out the tip, and restores the original shape by releasing the pulling force. When no force is applied, the upper opening 8 of the main body 2 is opened, and the upper opening 8 of the main body 2 can be closed by pulling and extending the tip side.

  Furthermore, the front end side of the lid main body 1501 as a free end can be locked to the bottom plate 13 in a state where the lid main body 1501 is extended. That is, in this embodiment, a lid side connecting portion 1503 is provided on the distal end side of the lid main body 1501, and a magnet 1504 is attached to the lid side connecting portion 1503.

  On the other hand, a lower surface of the bottom plate 13 is provided with a main body side connecting portion, and the main body side connecting portion includes a magnet or a magnetic body that can be attracted to a magnet 1504 attached to the lid side connecting portion 1503. After the lid main body 1501 is extended to a position where the magnet 1504 provided in the lid side connecting portion 1503 can be attracted to the magnet or magnetic body provided in the main body side connecting portion, the magnet 1504 provided in the lid side connecting portion 1503 is connected to the main body side. By adsorbing to the magnet or magnetic body provided in the part, the front end side of the lid main body 1501 as a free end can be locked to the bottom plate 13.

  The main body side connecting portion is not necessarily provided on the bottom plate 13, and may be provided on the front plate 3, whereby the front end side of the lid main body 1501 may be locked to the front plate 3. Further, a magnetic body may be attached to the lid side connecting portion 1503 and a magnet may be attached to the main body side connecting portion. Furthermore, the method of locking the front end side of the lid main body 1501 to the bottom plate 13 or the front plate 3 is not particularly limited to a magnet, and any method may be used. For example, the front end side of the lid main body 1501 may be secured by a hook or the like. The bottom plate 13 or the front plate 3 may be locked.

  Further, the method for making the lid body 1501 extendable is not particularly limited. For example, a method in which the lid body is made of an elastic material such as rubber can be considered. In this embodiment, the lid body 1501 is made of a roll sheet. Yes. That is, bearing parts 1505 are provided at both ends of the support part 1502, a shaft is attached between the bearing parts 1505, and a winder is configured by the bearing part 1505 and the shaft. Is wound around the shaft while being fixed to the shaft. And the lid body 1501 is made of a shape memory material that stores the form of the wound state, and is drawn out and extended into a sheet shape by pulling out the leading end side, thereby releasing the pulling force. It is supposed to be restored to a roll.

  Next, reference numeral 16 in FIG. 1 denotes a backpack belt. That is, in the school bag 1 of the present embodiment, the shoulder belt 16 is attached to the backrest portion 6, thereby making it possible to carry the main body portion 2 integrated with the frame 9.

  Here, the backpack 16 will be described. In the present embodiment, the backpack 16 is made of an elastic material such as rubber, and is therefore extensible. And after connecting the upper end side to the back ring 17 attached above the backrest portion 6 and winding the lower stage side upper connection portion 1103, the lower end side is attached to the lower part of the column 10. It is attached to the piece 18.

  The shoulder belt 16 has a length that abuts against the backrest portion 6 when no force is applied. Therefore, in the present embodiment, the shoulder belt 16 is in contact with the backrest portion 6 when the school bag 1 is not carried, and can be extended and carried by pulling, so that the school carrying the back. By removing the bag from the shoulder, the bag is restored to its original shape and brought into contact with the backrest 6.

  At this time, a storage groove in which the shoulder belt 16 is fitted when the school bag 1 is not carried may be formed in the backrest portion 6, so that when the school bag 1 is not carried, the shoulder belt 16. Can be prevented from fitting into the storage groove and protruding from the surface of the backrest.

  FIG. 3 is a view showing a connecting structure of the upper end portion of the shoulder belt 16, and in the figure, 17 is a back ring. The back ring 17 has a main body portion 1701 similar to a back ring generally used for a school bag, and the main body portion 1701 is attached above the backrest portion 6. In addition, a pair of oscillating arms 1702 are attached to the main body 1701 so that the upper part protrudes upward from the main body 1701 and can be rotated in the left-right direction, and connected to the upper end of the oscillating arm 16. A ring 1703 is connected, and the upper end side of the shoulder belt 16 is attached to the connection ring 1703. However, the connection method of the shoulder belt 16 is not particularly limited, and any method may be used as long as it can be connected to the upper portion of the backrest portion 6.

  Further, in the present invention, the attachment location on the upper end side of the shoulder belt 16 is not necessarily limited to the backrest portion 6, and the upper end side may be connected to the lower stage upper connection portion 1103, You may make it movable to the left-right side with respect to the lower stage side upper connection part 1103. FIG.

  Furthermore, the lower end side of the shoulder belt 16 does not necessarily have to be attached to the lower portion of the support column 10 via the connecting piece 18, and may be attached to the lower portion of the backrest portion 6 or the bottom plate 13.

  Next, the operation of the school bag 1 of the present embodiment configured as described above will be described. The school bag 1 of the present embodiment is not carried on the back, and there is no textbook or the like in the main body 2. Further, when the opening 8 at the top of the main body 2 is closed by locking the front end side of the lid main body 1501 as a free end to the bottom plate 13, the gusset width of the gusset 5 is applied with any force. If not close to the normal width.

  In this state, the substantially normal gusset width of the gusset portion 5 is maintained by the tightening by the front tightening 7 and the restoring force of the lid main body 1501 to return to the original form. In cooperation, the other side bottom plate 13b slides to the one side bottom plate 13a side until the length in the front-rear direction of the bottom plate 13 becomes substantially equal to the gusset width, whereby the capacity of the main body 2 is normal. Capacity.

  In this state, when pressure is applied to the main body portion 2 in the direction in which the gusset portion 5 is contracted, the gusset portion 5 is contracted, and in cooperation therewith, the other side bottom plate 13b slides toward the one side bottom plate 13a, thereby The distance between the front and rear of the bottom plate 13 is also shortened, the capacity of the main body 2 is minimized, and the gusset 5 is restored to the normal gusset width by releasing the force applied in the shrinking direction. Therefore, the school bag 1 of the present embodiment can be made compact as a whole, and the school bag 1 can be easily stored on a shelf or the like by making it compact.

  Moreover, in the state which is not carried on the back, the backpack belt 16 has a normal length when no force is applied, and is in a state of being in contact with the backrest portion 6, so that the school bag 1 is placed on a shelf or the like. The backpack 16 does not get in the way of storage, the backpack 16 is not damaged when stored in a shelf or the like, and the backpack 16 does not occupy more space than necessary. At this time, when the storage groove into which the backpack belt 16 is fitted is formed in the backrest portion 6, the backpack belt 16 is fitted into the storage groove, so that the backpack belt 16 protrudes from the surface of the backrest portion 6. There is nothing, and it is easier to store on a shelf.

  Next, the upper end 8 of the main body 2 is closed by locking the front end side of the lid main body 1501 to the bottom plate 13, and the lid 2 is closed in a state where the capacity of the main body 2 is a normal capacity. When the connection between the side connection portion 1503 and the main body side connection portion is released, the lid main body 1501 is wound around the shaft of the winder and restored into a roll shape, whereby the upper opening 8 of the main body portion 2 is opened, and the textbook Etc. can be accommodated.

  And if textbooks etc. are put in the main-body part 2, and the accommodation amount of textbooks etc. exceeds the normal accommodation amount of the main-body part 2, the gusset part 5 will expand and a gusset width will be expanded, In cooperation, the other side bottom plate 13b slides with respect to the one side bottom plate 13a side until the front and rear lengths of the bottom plate 13 are substantially the same as the gusset width, whereby the accommodation amount of the main body 2 is accommodated. It becomes the capacity according to the capacity of textbooks. In this state, the lid body 1501 is pulled out and extended, and the lid-side connecting portion 1503 is connected to the body-side connecting portion, so that the opening 9 at the top of the body portion 2 can be closed again by the lid 15. it can.

  Further, when the amount of the textbook or the like exceeds the normal amount of the main body 2, the force to return the normal width of the gusset portion 5, the tightening by the front tightening 7, and the lid main body 1501 The gusset portion 5 is tightened by the force to restore the shape of the main body 2, the size of the main body portion 2 can be maintained at a size corresponding to the contents, and the amount of textbooks and the like can be maintained. Even if the amount is less than the normal capacity, the gusset portion 5 is tightened by the force that the lid main body 1501 tries to restore to the original shape, and the size of the main body portion 2 is made to correspond to the size of the contents. This can eliminate the problem that the textbook or the like swings in the school bag 1 and makes it difficult to carry the school bag 1 on its back.

  Next, when the backpack 16 is pulled to carry the school bag 1, the backpack 16 extends and it is possible to put the arm on the shoulder. After carrying the school bag 1, the carrying belt 16 tries to shrink again, so the carrying belt 16 fits to the body, there is no gap between the school bag 1, and the main body 2 falls to the rear side. The problem that it is difficult to carry can be eliminated.

  Further, when a child carrying the school bag 1 falls backward, the net 14 can prevent the child's head from falling backward and the back of the head from hitting the ground. The back of the head can be protected and whiplash can be prevented.

  As described above, the school bag 1 of the present embodiment can change the capacity of the school bag according to the amount of the stored items, so that the textbook etc. swings in the school bag when the stored items are small. Thus, it is possible to prevent the backpack from becoming difficult to carry, and it is possible to make the whole compact and easy to store in a shelf or the like when it is not carried on the back.

  In addition, the backpack belt can be extended and retracted so that the backpack belt abuts against the back plate when it is not on the backboard, so there is no need to fold and hold the backpack belt by hand when storing it on a shelf, etc. This saves time and prevents the carrying belt from taking up more space than necessary when not carrying it.

  In addition, the main body is placed and fixed on the frame. Since the net is stretched on the frame, the child's back head is protected by the net when a child carrying a school bag falls. It is possible.

  The school bag of the present invention can be stored in a shelf or the like by making the volume variable according to the amount of contents and compact when not carrying it, and when the child falls, the back of the child's head Can be protected from unforeseen accidents, and can be applied to backpacks such as school bags.

DESCRIPTION OF SYMBOLS 1 School bag 2 Main body part 3 Front board 4 Back board 5 Machi part 6 Back rest part 7 Front fastening 8 Opening of upper part of main body part 9 Frame 10 Support | pillar 11 Upper connection part 1101 Upper stage side upper connection part 1102 Middle stage side upper connection part 1103 Lower stage upper connecting part 12 Lower connecting part 13 Bottom plate 14 Net 15 Lid 1501 Lid body 1502 Supporting part 1503 Lid side connecting part 1504 Magnet 16 Back belt 17 Back ring 18 Connecting piece

Claims (7)

A pair of struts (10), a connecting portion connecting the pair of struts (10), and a bottom plate (13) connected to one side of the strut (10) while connecting the pair of struts (10) at the lower portion. And a frame (9) comprising:
The front plate (3), the back plate (4), and the left and right ends of the front plate (3) and the back plate (4) mounted on the bottom plate (13) of the frame (9). A pair of accordion-like gussets (5), and a body (2) having an opening (8) at the top;
A lid (15) for opening and closing the upper opening (8) of the main body (2);
A pair of shoulder belts (16) having an upper end connected to an upper portion of the frame (9) or the main body (2) and a lower end connected to a lower portion of the frame (9) or the main body (2); And
The gusset part (5) can be expanded and contracted to widen the gusset width by applying a force to the expansion side, and to restore the normal width by releasing this force, while by applying a force to the contraction side, the gusset width Shrinks, and by releasing this force,
The bottom plate (13) is composed of one side bottom plate (13a) and the other side bottom plate (13b) slidably connected to the one side bottom plate (13a),
The lid (15) is extendable and retractable, is extended by pulling out the tip, is restored to its original shape by releasing the pulling force, and the base end side is connected to the upper side of the back plate (4). The front end side is a free end and can be locked to the front plate (3) or the bottom plate (13) in an extended state. When no force is applied, the top side of the main body (2) is In the state where the opening (8) is opened and the tip side is pulled out and extended, the upper opening (8) of the main body (2) is closed.
The back belt (16) is made of an elastic material such as rubber so as to be stretchable, and is in contact with the back plate (4) when no force is applied. bag.   A lid side connecting portion (1503) is provided at the tip of the lid (15), and a main body side connecting portion to which the lid side connecting portion (1503) can be connected to the front plate (3) or the bottom plate (13). And the front end side of the lid (15) is locked to the front plate (3) or the bottom plate (13) by connecting the lid side connecting portion (1503) to the main body connecting portion. Item 1. The school bag according to item 1.   The lid-side connecting portion (1503) includes a magnet or a magnetic body (1504), and the main body-side connecting portion includes a magnet or magnetic body that can be attracted to the magnet or magnetic body (1504) provided with the lid-side connecting portion (1503). The school bag according to claim 2, further comprising a body, wherein the lid side connecting portion (1503) and the main body side connecting portion are connected by magnetic force.   The connecting portion that connects the pair of struts (10) includes an upper connecting portion (11) that connects the pair of struts (10) at an upper portion, and a lower connection that connects the pair of struts (10) at a lower portion. The school bag according to claim 1, further comprising a portion (12).   The school bag according to claim 4, wherein the upper connecting part (11) is provided with a net (14).   The school bag according to any one of claims 1 to 5, wherein each of the pair of struts (10) is vertically extendable.   The school bag according to any one of claims 1 to 5, wherein each of the pair of struts (10) has an upper portion that can be folded.

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