JP3230066U - school bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a school bag for preventing failure or damage of an electronic device by absorbing an impact force or an external pressure applied from the outside to the electronic device stored in the device storage portion of the school bag. SOLUTION: The school bag body 2 has a main storage room 3 and a sub storage room 5 for accommodating various teaching materials such as textbooks and notebooks, and a front pocket portion 7, and a lid plate 9 for opening and closing the upper part of the school bag body. In the school bag 1, a lightweight and durable partition plate 11 is attached in the substantially central width direction of the sub-accommodation chamber 5, and an equipment storage unit for storing electronic devices and the like in and out between the partition plate and the partition portion of the main accommodation chamber 3. 20 is provided, and a teaching material storage unit 30 for storing various teaching materials is provided between the partition plate 11 and the front pocket portion 7. [Selection diagram] Fig. 1

Description

The present invention relates to the improvement of school bags for school children.

Conventionally, a school bag for school children is composed of a school bag body formed of leather or synthetic leather, a lid plate to cover the school bag body, and a backpack belt carrying the school bag body, and the school bag body mainly stores textbooks and notebooks. It is formed by attaching a storage room, a sub-storage room for accommodating various teaching materials, and a front pocket for accommodating small items.

In the main containment room of school bags, prints and notices given at school are printed in A4 size these days, and the printed matter is often housed in a clear file and handed over. Therefore, the main storage room of the school bag is formed wide so that the A4 version clear file can be stored without bending.

On the other hand, in recent years, due to the evolution of information technology, information education and ICT utilization education will be carried out from 2020 as shown in the new course of study of the Ministry of Education, Culture, Sports, Science and Technology. Therefore, school children will take classes on a daily basis using electronic devices equipped with display panels such as laptop computers or tablet terminals. Therefore, school children must store the electronic device in a school bag and carry it when they go to and leave school.

Therefore, the school bag requires a storage space for accommodating the electronic device, and as the storage space, a bag-shaped accommodating body for accommodating the electronic device is attached to the sub accommodating chamber side in the main accommodating chamber. It is widely known that the accommodating body is provided with a detachable portion made of a hook or the like, and the detachable portion and the detachable portion formed of a hook or the like provided above the main accommodating chamber are attached and used so as to be connectable (Patent Documents). 1).

Alternatively, there is also a school bag characterized in that the electronic device is stored in the sub-storage section, and a formed body having a suede surface on the panel side of the electronic device and an opening for inserting and removing the electronic device is provided on the upper surface. It is widely known (Patent Document 2).

Practical No. 3210939 Practical No. 3180954

However, in Document 1, when an electronic device having a weight (500 g or more) is accommodated in the main accommodation chamber, the storage space of the main accommodation chamber becomes narrow because the main accommodation chamber stores a large number of textbooks and notebooks. In addition, school children who carry school bags on their backs may come off because their behavior is rough and the containment is only hooked. Or, as in Document 2, since the opening of the forming body that stores the electronic device remains open, the school bag may be turned over by play or mischief by school children who are going to and from school. In that case, the school bag is stored in the forming body. There is a problem that the electronic device may fall out from the opening, which may cause damage or failure of the electronic device.

Therefore, in the present invention, by providing a space for storing the electronic device in the sub-containment chamber, which has a relatively small number of stored items and the manufacturing process is easy, the stored electronic device is damaged by the violent behavior of school children or a strong impact from the outside. Another issue is that by preventing breakdowns and storing electronic devices in a stable manner, it is possible to reduce the fatigue of school children who carry school bags when going to and from school, and to be able to use the electronic devices in class with peace of mind. Is to be.

The invention of claim 1 is a main storage room 3 for accommodating various teaching materials such as textbooks and notebooks, a school bag body 2 having a sub storage room 5 and a front pocket portion 7, and a lid plate that covers the upper part of the school bag body so as to be openable and closable. In the school bag 1 composed of 9, a partition plate 11 is attached in the substantially central width direction of the sub-accommodation chamber 5, and electronic devices X and the like can be taken in and out between the partition plate and the partition portion 4 of the main accommodation chamber 3. A device storage section 20 for storing is provided, a teaching material storage section 30 for storing various teaching materials is provided between the partition plate 11 and the front pocket section 7, and a lid cloth 25 can be opened and closed in the opening 21 of the device storage section 20. It is characterized by being attached to. Further, the sub-accommodation chamber 5 is provided with a plurality of folds 6 and 6 that can expand and contract the front-rear width (gusset width) according to the amount of stored items, and the folds 6 and the folds in the sub-accommodation chamber 5 are provided. The partition plate 11 is attached between the portions 6, and an equipment storage portion 20 for storing electronic devices X and the like so as to be able to be taken in and out is provided between the partition plate and the partition portion 4, and the partition plate 11 and the front pocket portion 7 are provided. A teaching material storage unit 30 for storing various teaching materials is provided between the two, and a lid cloth 25 is attached to the opening 21 of the equipment storage unit 20 so as to be openable and closable. Further, the partition plate 11 is characterized in that a gusset stopper 13 formed by projecting the left and right sides and the three sides of the bottom together with the gussets and the bottom surface of the sub-containment chamber 5 is sewn and fixed. To do. Further, the lid cloth 25 attached to the opening 21 of the equipment storage portion 20 has one side attached to the wall surface of the partition portion 4, and the other side covers the opening 21 of the equipment storage portion 20 to cover the partition plate 11. It is characterized in that it is detachably attached to an adhesive portion 26 provided on a front side wall surface (teaching material accommodating portion side). Further, the lid cloth 25 is characterized in that it is formed to have a width of about two-thirds of the width of the opening 21 provided above the device storage portion 20. Further, the partition wall portion 4 and the partition plate 11 constituting the device storage portion 20 are sponges that absorb and mitigate external impacts on the opposing surfaces of the core plates 4a and 11a made of lightweight and durable non-woven fabric plates. It is characterized in that the buffer portions 4b and 11b made of a foamed synthetic resin material such as urethane and the epidermis portions 4c and 11c made of a synthetic leather material are polymerized.

Therefore, the device storage section 20 in which the partition plate 11 is mounted in the sub-storage chamber 5 in the width direction to allow the electronic device X and the like to be taken in and out on one side, and the teaching material storage section 30 for storing various teaching materials on the other side, respectively. The lid cloth 25 is operably attached to the opening 21 of the device storage portion 20 so as to prevent the electronic device X housed from falling off. Further, by locating the device storage portion 20 substantially in the center of the school bag, it is possible to protect the electronic device by mitigating the impact from the front-back direction of the school bag without being directly transmitted. Further, the partition plate 11 is externally fixed by sewing and fixing a gusset stopper 13 provided so that the left and right sides and the three sides of the bottom are projected together with the gussets 5a and the bottom surface 5b on both sides of the sub-containment chamber 5. Since it is possible to prevent the sub-accommodation chamber 5 from being deformed by the pressing force from the device, the electronic device X accommodated in the device accommodating portion 20 can be safely protected. Furthermore, in the equipment storage chamber 20, the partition portions 4 and the partition plates 11 are made of lightweight and durable non-woven fabric plates, and the facing surfaces of the core plates 4a and 11a are respectively opposed to the buffer portions 4b and 11b to absorb and mitigate the impact from the outside. By polymerizing the skin portions 4c and 11c to form a strong structure, it is possible to absorb and mitigate external impacts, especially impacts from the main storage chamber 3 side and the front pocket portion 7 side, resulting in damage to the electronic device X and damage. It is possible to prevent failures such as malfunctions. Further, since the width of the lid cloth 25 is formed to be about two-thirds of the width of the opening 21 provided in the equipment storage portion 20, even a lower grade school child can easily peel and open the lid cloth 25.

The invention of claim 7 is a main storage room 3 for accommodating various teaching materials such as textbooks and notebooks, a school bag body 2 having a sub storage room 5 and a front pocket portion 7, and a lid plate that covers the upper part of the school bag body so as to be openable and closable. In the school bag 1 composed of 9, the sub-containment chamber 5 is provided with a plurality of folds 6 and 6 that allow the width of the gusset to be expanded and contracted according to the amount of stored items, and the folds 6 are provided in the sub-accommodation chamber 5. A gusset stopper 13 formed by projecting the left and right sides and the bottom three sides of the lightweight and durable partition plate 11 together with the gussets and the bottom surface of the sub-containment chamber 5 is sewn and fixed between the fold portion 6 and the fold portion 6. A device storage unit 20 is provided on one side (main room side) for storing the electronic device X and the like so that the electronic device X and the like can be taken in and out, and various teaching materials are placed on the other side (front pocket side). A teaching material storage unit 30 for storing is provided, and the opening 21 of the equipment storage unit 20 is covered with a lid cloth 25 formed to be two-thirds of the width of the opening so as to be openable and closable, and one side of the lid cloth is covered with the partition. It is attached to the wall surface of the portion 4, and the other side is detachably attached to the adhesive portion 26 provided on the front side wall surface (teaching material accommodating portion side) of the partition plate 11, and the partition portion 4 and the partition plate constituting the device storage portion 20 are attached. Reference numeral 11 denotes a foam synthetic resin material such as a sponge or urethane that absorbs and absorbs an impact from the outside on the facing surfaces of the core plates 4a and 11a made of a lightweight and durable non-woven fabric plate, and the cushioning portions 4b and 11b and synthetic leather. It is characterized in that it is formed by polymerizing the skin portions 4c and 11c, respectively.

Therefore, there is a partition between the folds 6 and the folds 6 in the sub-accommodation chamber 5 provided with a plurality of folds 6 and 6 that can expand and contract the front-rear width (gusset width) depending on the amount of stored items. A device storage unit 20 is formed on one side of the partition plate to which the plate 11 is attached and electronic devices X and the like can be taken in and out, and a teaching material storage unit 30 for storing various teaching materials is formed on the other side. By locating 20 at the substantially center of the school bag, it is possible to absorb and mitigate the impact from the front-back direction of the school bag. Further, the partition plate 11 is sewn and fixed to both sides of the sub-accommodation chamber 5 by sewing and fixing gusset stoppers 13 provided by projecting the left and right sides and the three sides of the bottom together with the gussets and the bottom surface of the sub-accommodation chamber 5. It is possible to reinforce the strength of the gusset portion and the bottom surface portion, prevent the sub-accommodation chamber 5 from being deformed by a pressing force from the outside, and protect the electronic device X accommodated in the equipment storage portion 20. Further, the partition portion 4 and the partition plate 11 constituting the equipment storage chamber 20 are combined with the shock absorbing materials 4b and 10b on the surfaces of the core plates 4a and 11a made of a lightweight and durable non-woven fabric plate facing each other. By polymerizing the skin parts 4C and 11c made of leather, it is possible to absorb and mitigate the impact from the outside, especially the impact from the main storage chamber 3 side and the front pocket portion 7 side, and damage the electronic device X or damage. It is possible to prevent failures such as malfunctions. Furthermore, by forming the width of the lid cloth 25 to about two-thirds of the width of the opening 21 provided in the equipment storage portion 20, the adhesive force of the adhesive portion 26 is reduced and the lid fabric 25 is adhered by an external impact. Although the part 26 is not peeled off, it has an adhesive force that can be easily peeled off and opened / closed by the power of a lower grade school child.

It is a perspective view of the school bag with the lid plate open. It is a side view of a school bag body. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. It is an enlarged cross-sectional view of the one-dot chain line circle part of FIG. It is an enlarged sectional view of the main part which shows the gusset stop part of a partition plate.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a school bag with the lid plate open, FIG. 2 is a side view of the school bag body, and FIG. 3 is a sectional view taken along line AA of FIG. , FIG. 4 is a cross-sectional view taken along the line BB of FIG. 3, and FIG. 5 is an enlarged cross-sectional view of the one-dot chain line circle portion of FIG. The school bag 1 is composed of a school bag main body 2 made of leather or synthetic leather, a lid plate 9 that covers the entire opening portion at the upper part of the school bag main body 2, and a backpack belt (not shown) on which a school child carries the school bag 1 on his back. There is.

As shown in FIG. 1, the school bag main body 2 separately stores teaching materials such as textbooks, notebooks, and pencil cases, and has a main storage room 3 with an open top and a sub-storage with an open top for other learning tools. A chamber 5 and a bag-shaped front pocket portion 7 whose upper surface can be opened and closed with a zipper are continuously provided.

Of course, the sub-accommodation chamber 5 may be a normal type sub-accommodation chamber in which the width of the gusset does not expand and contract, but as shown in FIG. 2, the sub-accommodation chamber 5 of the school bag main body 2 has a front-back width ( A sub-containment chamber 5 having a shape provided with a plurality of folds 6 and 6 that can expand and contract the gusset width) is used. A partition plate 11 is attached to the intermediate portion between the fold portion 6 and the fold portion 6 in the sub-accommodation chamber 5, and the electronic device X and the like can be taken in and out on one side of the partition (main accommodation chamber side). 20 is formed, and a teaching material storage unit 30 for storing various teaching materials is provided on the other side (front pocket portion side).

In the partition plate 11, the three sides of both sides and the bottom are integrally projected from the inside to the outside of the gussets on both sides and the bottom of the sub-containment chamber 5 to form a gusset stop 13, and the gussets are respectively formed. Sew and fix. By projecting the peripheral edge of the partition plate 11 and sewing and fixing it with the gusset stopper 13, the peripheral edge and the gusset portion of the partition plate 11 of the sub-accommodation chamber 5 can be firmly reinforced. Therefore, since the force for holding the entire sub-accommodation chamber 5 acts on the gusset stopper 13, it is possible to prevent the equipment accommodating portion 20 from being deformed not only by an external impact but also by an external pressing force.

Further, since the equipment storage portion 20 is located on the main storage chamber 3 side of the sub storage chamber 5, the equipment storage portion 20 is located substantially in the center of the school bag 1, so that the impact from the front-rear direction of the school bag 1 is direct. Since it can be mitigated without being transmitted to the electronic device X, it is possible to prevent failure or damage of the electronic device X.

A lid cloth 25 for preventing the electronic device X housed therein from falling off is attached to the upper opening 21 of the device storage section 20 so as to be openable and closable. One of the lid cloth 25 is attached to the wall surface of the partition portion 4 on the main storage chamber 3 side, and can be attached to and detached from the adhesive portion 26 provided on the front side wall surface (teaching material storage portion side) of the partition plate 11 so as to cover the opening 21. It is attached to.

The lid fabric 25 is made of a lightweight and durable synthetic fiber fabric material such as nylon or polyester, and the adhesive portion 26 attached to the lid fabric 25 is a well-known adhesive member and is a lightweight and sewn synthetic fiber fabric material. Using an easy male-female pair type hook-and-loop fastener, one female adhesive portion 26a is attached in the wall surface width direction of the front side wall surface (teaching material accommodating portion side) of the partition plate 11, and the other male adhesive portion 26b is attached to the back side of the lid cloth 25. It is formed so that it can be attached and detached by attaching it to the entire tip width direction.

Therefore, the adhesive portion 26 does not peel off even if it is turned over due to the violent behavior of a school child who goes to and from school with the school bag 10 on his back. Therefore, it is possible to prevent the electronic device X from inadvertently escaping by covering the opening 21 of the device storage section 20 with the lid cloth 25 so as to be openable and closable.

The lid cloth 25 does not cover the entire opening 21 of the device storage portion 20, but is formed to have a width of about two-thirds of the opening width. By making the width of the lid cloth 25 shorter than the width of the opening, the adhesive force between the adhesive portion 26b attached to the entire tip width direction of the lid fabric and the female adhesive portion 26a provided on the front side wall surface of the partition plate 11 is accommodated. Although it has an adhesive force that prevents the adhesive portion 26 of the lid cloth 25 from peeling off due to the impact force when the electronic device X is moved by an impact, it can be easily peeled off and opened / closed by the force of a lower grade school child. It is formed with an adhesive force that can be achieved.

As shown in FIG. 5, the partition portion 4 and the partition plate 11 constituting the equipment storage portion 20 are on the outer wall surface side of the core plate 4a made of a lightweight, durable, and easily sewn non-woven fabric plate constituting the partition portion 4. A sponge that absorbs and mitigates external impacts on the inner wall surface side of the core plate 11a of the partition plate 11 made of a non-woven fabric plate that is also lightweight, durable, and easy to sew, and prevents the electronic device X from failing or being damaged. , Cushioning parts 4b and 11b made of foamed synthetic resin material such as urethane are adhered to each other, and epidermis parts 4c and 11c made of synthetic leather protecting the cushioning parts 4b and 11b are attached to the outside of the cushioning parts 4b and 11b, respectively. It is formed by wearing it. The skin portion 4c attached to the partition wall portion 4 is formed so as to be attached not only to the device storage portion 20 side but also to the inner main storage chamber 3 side so as to prevent damage to teaching materials and the like to be stored inside. is there.

Therefore, the device storage section 20 is formed by firmly fixing the partition section 4 and both sides and the bottom of the partition plate 11 with the gusset stopper 13 to store various electronic devices X having a weight of 500 g or more. However, it is possible to prevent the device storage portion 20 from being deformed or damaged by the weight of the electronic device X.

Further, as described above, the device storage portion 20 is sewn by reinforcing the three sides of the left and right sides and the bottom side with the gusset stop portion 13 provided so as to project together with the gusset portions 5a and the bottom surface portion 5b of the sub-accommodation chamber 5. By fixing the clothes, it is possible to prevent the sub-accommodation chamber 5 from being deformed by a pressing force from the outside, so that the electronic device X accommodated in the device accommodating portion 20 can be protected.

Explaining the operation of the embodiment according to the present invention, the school bag 1 is formed by providing a plurality of folds 6 and 6 in the sub-storage chamber 5 constituting the school bag main body 2 so as to be expandable and contractible according to the storage capacity. A partition plate 11 is attached in the width direction of the sub-accommodation chamber 5 to divide the inside into two, and an equipment storage unit 20 is provided on one side and a teaching material storage unit 30 is provided on the other side, and the electronic device X can be stored in the equipment storage unit so that it can be taken in and out. A lid cloth 25 that can be opened and closed to prevent the electronic device X from falling off is attached to the upper opening 21.

Therefore, the equipment storage section 20 provided in the sub-containment chamber 5 is approximately in the center of the school bag 1, that is, outside the main storage chamber 3 (sub-containment chamber), and inside the front pocket portion 7 and the teaching material storage section 30 (secondary storage). By being located in the room), it is possible to prevent a strong impact force from the front-rear direction of the school bag 1 from being directly transmitted to the device storage unit 20, and to prevent failure or damage of the electronic device X housed inside.

The equipment storage portion 20 is partitioned by a partition portion 4 and a partition plate 11, and has three sides of both sides and a bottom of the partition plate 11 and three sides of a gusset and a bottom of both sides of the sub-accommodation chamber 5 from the inside. The gusset stopper 13 formed by integrally projecting so as to wrap around the outside is sewn and fixed to reinforce it, and the device storage portion 20 is firmly formed to increase the impact from the gusset side and the bottom side and the weight of the teaching material. It is possible to prevent the device storage unit 20 from being deformed due to an impact caused by movement or the like.

Further, the partition portion 4 and the partition plate 11 are shock absorbing materials that absorb and mitigate the impact from the outside on the core plates 4a and 11a of the surfaces facing each other and prevent the electronic device X housed inside from being damaged or damaged. The buffer portions 4b and 11b made of a foamed synthetic resin material such as sponge and urethane are polymerized, respectively, and the epidermis portions 4c and 11c made of synthetic leather that protect the buffer portion are attached to the outside of the buffer portions 4b and 11b, respectively. Is formed. Therefore, it is possible to prevent the impact from the outside from being directly transmitted to the electronic device X, so that the electronic device X can be sufficiently protected.

Further, the lid cloth 25 attached to the opening 21 of the device storage portion 20 so as to be openable and closable has a width narrower than the opening width (about two-thirds) of the lid cloth 25. It has an adhesive force that prevents the electronic device X that stores the adhesive force of the adhesive portion 26 attached to the entire tip width direction from escaping from the device storage portion 20 due to an external impact, but it is easy for even lower grade school children to use S. It has an adhesive force that can be peeled off and opened and closed. Further, the adhesive portion 26 has an adhesive strength so that the lid cloth 26 attached to the opening 21 does not come off even if the school bag 10 is turned over due to play or mischief while the school child goes to and from school. Therefore, even if a strong impact is received from the outside, there is no possibility that the electronic device X in the device storage unit 20 will pop out, which is safe.

As described above, by attaching the equipment storage unit 20 to the main storage room 3 side of the sub storage unit 5 and locating it at the center of the school bag 1, the outside due to play or mischief during school children who handle the school bag 1 roughly. Since the impact from the device can be absorbed and softened without being directly transmitted to the device storage unit 20, it is possible to prevent a failure such as damage or malfunction of the electronic device X that is vulnerable to the impact. Therefore, it is very economical because it is possible to prevent the breakdown of the expensive electronic device X lent to each school child.

Further, the equipment storage portion 20 is formed to be sturdy by the partition wall portion 4, the partition plate 11, and the gusset stop portion 13 provided on the partition plate, and the partition wall portion 4 and the partition plate constituting the equipment storage portion 20 are formed. By including the cushioning portions 4b and 11b in the entire interior of the 15th, the strong impact force transmitted from the main storage chamber 3 side or the front pocket portion 7 side of the school bag is directly transmitted to the precision equipment X in the equipment storage portion 20. It is possible to prevent and protect the electronic device X that is vulnerable to impact.

1 School bag 2 School bag body 3 Main storage room 4 Partition part 4a Core plate 4b Buffer part 4c Skin part 5 Sub-storage room 7 Front pocket part 9 Lid plate 11 Partition plate 11a Core plate 11b Buffer part 11c Skin part 13 Machi stop 20 Equipment Storage 21 Opening 25 Lid cloth 26 Adhesive part 26a Female adhesive part 26b Male adhesive part 30 Teaching material storage part X Electronic device

Claims (7)

A school bag body (2) having a main storage room (3), a sub storage room (5), and a front pocket (7) for storing various teaching materials such as textbooks and notebooks, and a lid that covers the upper part of the school bag body so as to be openable and closable. In a school bag (1) composed of a plate (9), a partition plate (11) is attached in a substantially central width direction of the sub-containment chamber (5), and a partition portion (4) between the partition plate and the main accommodation chamber (3) is attached. A device storage unit (20) for storing electronic devices (X) and the like so that they can be taken in and out, and a teaching material storage unit (7) for storing various teaching materials between the partition plate (11) and the front pocket portion (7). A school bag characterized in that (30) is provided and a lid cloth (25) is openably and closably attached to an opening (21) of the device storage portion (20). The sub-accommodation chamber (5) is provided with a plurality of folds (6, 6) that can expand and contract the front-rear width (gusset width) according to the amount of stored items, and the creases in the sub-accommodation chamber (5). Equipment storage in which the partition plate (11) is attached between (6) and the fold portion (6), and an electronic device (X) or the like can be taken in and out between the partition plate and the partition portion (4). A part (20) is provided, a teaching material storage part (30) for storing various teaching materials is provided between the partition plate (11) and the front pocket part (7), and an opening (21) of the device storage part (20) is provided. The school bag according to claim 1, wherein the lid cloth (25) is attached to the cloth (25) so as to be openable and closable. The partition plate (11) is formed by sewing and fixing a gusset stopper (13) formed by projecting the left and right sides and the three sides of the bottom together with the gussets and the bottom surface of the sub-containment chamber (5). The school bag according to claim 1 or 2. The lid cloth (25) attached to the opening (21) of the equipment storage portion (20) has one side attached to the wall surface of the partition (4) and the other side covering the opening (21) to cover the partition plate (21). The school bag according to claim 1 or 2, wherein the school bag is detachably attached to an adhesive portion (26) provided on a front side wall surface (teaching material accommodating portion side) of 11). The first or fourth aspect of the present invention, wherein the lid cloth (25) is formed to have a width of about two-thirds of the width of the opening (21) provided above the device storage portion (20). school bag. The partition portion (4) and the partition plate (11) constituting the device storage portion (20) absorb external impacts on the opposing surfaces of the core plate (4a, 11a) made of a lightweight and durable non-woven fabric plate. The first or second claim, wherein the cushioning portion (4b, 11b) made of a foamed synthetic resin material such as a sponge or urethane for relaxation and the epidermis portion (4c, 11c) made of a synthetic leather material are polymerized. School bag. A school bag body (2) having a main storage room (3), a sub storage room (5), and a front pocket (7) for storing various teaching materials such as textbooks and notebooks, and a lid that can open and close the upper part of the school bag body. In the school bag (1) composed of the plate (9), the sub-accommodation chamber (5) is provided with a plurality of folds (6, 6) that can expand and contract the gusset width according to the amount of stored items. In the containment chamber (5), between the folds (6) and the folds (6), the left and right sides of the lightweight and durable partition plate (11) and the three sides of the bottom are both sides of the sub-containment chamber (5). A gusset stopper (13) formed by projecting together with a gusset portion and a bottom portion is sewn and fixed to form, and an electronic device (X) or the like is formed on one side (main room side) partitioned by the partition plate (11). A device storage section (20) for storing the device in and out is provided, a teaching material storage section (30) for storing various teaching materials is formed on the other side (front pocket section side), and an opening (20) of the device storage section (20) is formed. 21) is covered with a lid cloth (25) formed in a width of two-thirds of the opening width so as to be openable and closable, one side of the cover cloth is attached to the wall surface of the partition portion (4), and the other side is a partition plate. The partition portion (4) and the partition plate (11) that are detachably attached to the adhesive portion (26) provided on the front side wall surface (teaching material accommodating portion side) of (11) and constitute the device accommodating portion (20) are , Sponge that absorbs and absorbs external impact on the opposite surfaces of the core plate (4a, 11a) made of lightweight and durable non-woven fabric, from foamed synthetic resin material such as urethane, cushioning part (4b, 11b) and synthetic leather A school bag characterized by being formed by polymerizing the epidermis portions (4c, 11c) made of the same.

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