JP6683764B2 - school bag - Google Patents

Description

  The present invention relates to a school bag.

  Conventionally, there is a school bag called a learning school type. In this school-type school bag, the gusset portion of the accommodating portion for accommodating a textbook or the like has a side wall portion that surrounds the accommodating space of the accommodating portion and an overhanging portion that projects outward from the side wall portion. The projecting portion is connected to the back portion of the accommodating portion. This learning school type school bag is described in, for example, Utility Model Registration No. 3078744 (Patent Document 1).

Utility model registration No. 3078744

  In the learning school type school bag described above, since the projecting portion projects outward from the side wall portion, the outer shape of the back portion is larger than that of the side wall portion. Therefore, when the accommodation space surrounded by the side wall portion becomes large, the outer shape of the back portion also becomes large, so that the accommodation portion becomes large. Therefore, it is difficult to increase the size of the storage space while suppressing the size of the storage unit from increasing. Further, the overhang portion plays a role of reinforcing the accommodation portion. Therefore, it is difficult to secure the strength of the accommodating portion unless the overhanging portion is provided in order to prevent the accommodating portion from increasing in size.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a school bag that can increase the size of the accommodation space while suppressing the size of the accommodation part and can secure the strength of the accommodation part. That is.

The school bag of the present invention includes a housing portion provided with an opening portion, a lid portion connected to the housing portion such that the opening portion can be opened and closed, and a pair of back belts connected to the housing portion. The housing portion includes a back portion to which one end of each of the pair of backpack belts is connected and a lid portion is connected, and a gusset portion connected to an outer edge portion of the back portion. The gusset portion includes a surface material, a core having a higher bending rigidity than the surface material and arranged inside the surface material, and an inner core having a higher bending rigidity than the surface material and arranged inside the center material. Only one of the inner core and the inner core includes a main body portion and a protruding portion that protrudes from the main body portion to the side opposite to the outer surface. The body and the protrusion are supported by the back. The inner core includes a protrusion. The bent portion of the inner core is in contact with the inner surface of the back portion, and the inner core is pierced straight against the inner surface of the back portion.

  According to the school bag of the present invention, one of the inner core and the inner core includes a protruding portion that protrudes from the main body portion to the side opposite to the outer surface. For this reason, the protruding portion does not protrude outward from the outer material. Therefore, since the outer shape of the back portion does not become larger than that of the gusset portion, the accommodation space can be increased while maintaining the size of the back portion. Therefore, it is possible to increase the size of the storage space while suppressing the size of the storage unit from increasing. Further, the gusset portion includes a center core and an inner core. Therefore, the strength of the housing portion can be secured by both the inner core and the inner core. Further, the main body portion and the protruding portion are supported by the back portion. Therefore, the strength of the accommodating portion can be ensured by the main body portion and the protruding portion.

It is a schematic perspective view of the school bag in the embodiment of the present invention. It is a disassembled perspective view of the back part and gusset part of the school bag shown in FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. FIG. 3 is a development view of a center core and an inner core of the gusset portion shown in FIG. 2. FIG. 3 is a development view of the outer material of the gusset portion shown in FIG. 2. It is a development view of a gusset part and a reinforcing member shown in FIG. It is a figure for demonstrating arrangement | positioning of the back part and gusset part shown in FIG. It is a schematic perspective view of the school bag in a comparative example. It is sectional drawing which follows the XX line of FIG. It is sectional drawing which follows the XI-XI line of FIG. FIG. 9 is a cross-sectional view of a school bag of a modified example 1 according to an embodiment of the present invention at a position corresponding to FIG. 3. FIG. 9 is a cross-sectional view of a school bag of modification 1 according to an embodiment of the present invention at a position corresponding to FIG. 4. FIG. 9 is a cross-sectional view of a school bag of a modified example 2 according to an embodiment of the present invention at a position corresponding to FIG. 3. FIG. 16 is a cross-sectional view of a school bag of a modified example 2 according to an embodiment of the present invention at a position corresponding to FIG. 4.

  An embodiment of the present invention will be described below with reference to the drawings. In the following drawings, the same or corresponding parts will be denoted by the same reference numerals, and the overlapping description will not be repeated.

First, the structure of the school bag according to the embodiment of the present invention will be described.
With reference to FIG. 1 and FIG. 2, the school bag 100 in the present embodiment mainly includes a housing portion 1, a lid portion 2, a pair of backpack belts 3, a connecting member 4, and a reinforcing member 5. ing.

  The accommodating part 1 has a back part 11, a gusset part 12, and a front part 13. The accommodation portion 1 is provided with an opening OP. The housing 1 has an opening OP at the upper end. The housing portion 1 has a housing space IS communicating with the opening OP. The accommodation space IS is a space surrounded by the inner peripheral surfaces of the back portion 11, the gusset portion 12, and the front portion 13. The accommodation section 1 is configured to be able to accommodate a textbook or the like in the accommodation space IS through the opening OP.

  One end of each of the pair of backpack belts 3 is connected to the back portion 11. The lid portion 2 is connected to the back portion 11. The connecting member 4 is attached to the back portion 11. Each of the pair of backpack belts 3 is connected to the back portion 11 via a connecting member 4. A reinforcing member 5 is attached to the back portion 11 and the gusset portion 12.

  The gusset portion 12 is connected to the outer edge portion 11 a of the back portion 11. The gusset portion 12 is connected to the outer edge portion 11 a of the upper portion of the back portion 11 excluding the central portion. That is, the gusset portion 12 is connected to the outer edge portion 11 a of the back portion 11 in a U shape.

  The gusset portion 12 has a pair of side portions 121 and a bottom portion 122. The pair of side portions 121 are arranged so as to face each other with the bottom portion 122 interposed therebetween. Each of the pair of side portions 121 is configured to rise from both ends of the bottom portion 122. The bottom portion 122 is arranged so as to face the opening OP.

  The lid portion 2 is connected to the housing portion 1 such that the opening OP can be opened and closed. Specifically, the lid part 2 is connected to the upper end of the back part 11 of the housing part 1, and the opening OP can be opened and closed with the upper end of the back part 11 as the base end. The lid portion 2 is configured to be able to cover the opening OP and the front surface portion 13 of the housing portion 1 in the closed state shown in FIG. 1. Further, the lid portion 2 is configured to be able to expose the opening OP and the front portion 13 of the housing portion 1 in the opened state.

  The pair of backpack belts 3 are connected to the accommodating portion 1. Specifically, one end of each of the pair of backpack belts 3 is connected to the upper end of the back portion 11 via the connecting member 4. In FIG. 1, for convenience of explanation, the pair of backpack belts 3 are shown only around one end of each, and not shown around the one end. The other end of each of the pair of back belts 3 is connected to the bottom portion 122 of the gusset portion 12 via a connecting member (not shown). The pair of backpack belts 3 are provided one on each side. The pair of backpack belts 3 are configured to be worn on both shoulders of the user when the user carries the school bag 100 on his back.

  The reinforcing member 5 is arranged in the lower portion of the housing portion 1 at a corner on the back 11 side of the housing portion 1. The reinforcing member 5 extends over the pair of side portions 121 along the lower end portion of the back portion 11. The reinforcing member 5 extends from the lower end portion of the back portion 11 so as to rise upward along each of the pair of side portions 121. The reinforcing member 5 is arranged over the back portion 11 and each of the pair of side portions 121, and is arranged over the back portion 11 and the bottom portion 122.

Subsequently, the configurations of the back portion 11 and the gusset portion 12 will be described in detail.
2 and 3, the gusset portion 12 includes a dress material 12a, a center core 12b, and an inner core 12c. The outer material 12a, the center core 12b, and the inner core 12c are overlapped with each other. The outer material 12a, the center core 12b, and the inner core 12c are arranged in this order from the outside to the inside.

  The outer material 12 a constitutes the outer surface of the gusset portion 12. The material of the outer material 12a is, for example, artificial leather or cow leather. The center core 12b has higher bending rigidity than the outer material 12a. The core 12b is made of a material different from that of the outer material 12a. The material of the core 12b is, for example, a resin, and specifically, may be a foamed resin in which polyethylene terephthalate fiber and polyester resin are mixed as main components. The center core 12b is arranged inside the dress material 12a. The inner core 12c has higher bending rigidity than the outer material 12a. The inner core 12c is made of a material different from that of the outer material 12a. The material of the inner core 12c is, for example, a resin, and specifically, may be a foamed resin in which polyethylene terephthalate fiber and polyester resin are mixed as main components. Further, specifically, the material of the inner core 12c may be a laminate of a resin in which pulp and an acrylic resin are mixed as main components and the foamed resin. The inner core 12c is arranged inside the middle core 12b.

  The core 12b may have bending rigidity equivalent to that of the inner core 12c. The inner core 12b may be made of the same material as the inner core 12c or may have the same thickness as the inner core 12c. Further, the core 12b preferably has a higher bending rigidity than the inner core 12c. In this case, the inner core 12b may be made of a material different from that of the inner core 12c, and may have a thickness larger than that of the inner core 12c.

  Either the inner core 12b or the inner core 12c includes a main body P1 and a protrusion P2. In the present embodiment, the inner core 12c includes the main body portion P1 and the protruding portion P2. The protruding portion P2 is configured to protrude from the main body portion P1 to the side opposite to the outer surface 12a. The protrusion P2 is arranged at the end of the main body P1 on the back 11 side. That is, a bent portion that is bent inward is provided on the rear side of the inner core 12c. The body portion P1 and the protruding portion P2 are supported by the back portion 11. That is, the bent portion of the inner core 12c is in contact with the inner surface of the back portion 11. Further, in the present embodiment, the center core 12b is straightly butted against the inner surface of the back portion 11.

  The outer material 12a, the center core 12b, and the inner core 12c are sewn together in a state of being overlaid on each other. That is, the outer material 12a, the center core 12b, and the inner core 12c are sewn so that the threads pass through each other in a state of being overlapped with each other.

  Specifically, the outer material 12a has a bent back portion P3. The bent portion P3 is superposed on the outer surface of the outer edge portion 11a of the back portion 11. The outer edge portion 11a of the back portion 11 is sandwiched by the bent portion P3 of the outer material 12a and the protruding portion P2 of the inner core 12c. With the outer edge portion 11a of the back portion 11 sandwiched by the bent portion P3 of the outer material 12a and the protruding portion P2 of the inner core 12c, the bent portion P3 of the outer material 12a, the outer edge portion 11a of the back material 11, and the inner core 12c. The projecting portion P2 is sewn integrally with the thread 6. The outer material 12 a, the center core 12 b, and the main body P 1 of the inner core 12 c are integrally sewn with the thread 7.

  With reference to FIG. 4, the reinforcing member 5 is arranged at the corner on the back 11 side of the housing 1 so as to cover the outer material 12a from the outside. The bent portion P3 of the dress material 12a is sandwiched by the reinforcing member 5 and the back portion 11. With the reinforcing member 5 and the protruding portion P2 of the inner core 12c sandwiching the bent portion P3 of the outer material 12a and the outer edge portion 11a of the back portion 11, the reinforcing member 5, the bent portion P3 of the outer material 12a, and the back portion. The outer edge portion 11a of 11 and the protruding portion P2 of the inner core 12c are integrally sewn with the thread 6. Further, the reinforcing member 5, the outer material 12 a, the center core 12 b, and the main body P 1 of the inner core 12 c are integrally sewn with the thread 7.

  The arrangement of the back portion 11 and the gusset portion 12 will be described in more detail with reference to FIGS. 5 to 8. For convenience of description, FIGS. 5 to 8 illustrate a state in which the gusset portion 12 is expanded. With reference to FIG. 5, the inner core 12b is laid on the inner core 12c along a boundary line between the main body portion P1 and the protruding portion P2 of the inner core 12c. The outer shape of the middle core 12b is smaller than the outer shape of the inner core 12c. A projecting portion P2 is arranged at one end in the lateral direction of the inner core 12c so as to extend in the longitudinal direction. The inner core 12c has a cutout portion 20. The cutout portion 20 is provided at the edge of the protrusion P2 extending in the longitudinal direction. Two notches 20 are provided at the central portion of the protrusion P2 in the longitudinal direction. The cutout portion 20 is formed in a sawtooth shape. The notch 20 facilitates bending of the protruding portion P2 of the inner core 12c.

  With reference to FIG. 6, a bent portion P3 is arranged at one end in the lateral direction of the outer material 12a so as to extend in the longitudinal direction. Referring to FIG. 7, outer material 12a, center core 12b, and inner core 12c are overlaid on each other. Further, the reinforcing member 5 is overlaid on the outer material 12a from the side opposite to the center core 12b. The reinforcing member 5 is arranged in the central portion of the dress material 12 a in the longitudinal direction, and is arranged so as to overlap the cutout portion 20. Referring to FIG. 8, the back portion 11 is positioned on the gusset portion 12 such that the bent portion P3 of the dress material 12a is located at the outer edge portion 11a of the back portion 11. The back portion 11 is positioned on the gusset portion 12 so that the corners of the lower end of the back portion 11 overlap the cutout portion 20.

  Next, the function and effect of the school bag 100 in the present embodiment will be described in comparison with a comparative example.

  With reference to FIG. 9, the school bag 100 in the comparative example is a so-called learning school school bag 100. In the school bag 100 of the comparative example, the gusset portion 12 has a side wall portion 123 that surrounds the housing space IS of the housing portion 1 and a projecting portion 124 that projects outward from the side wall portion 123. The overhanging portion 124 is connected to the outer edge portion 11 a of the back portion 11 of the housing portion 1. The overhanging portion 124 and the outer edge portion 11 a are covered with the corner material 8 from the outside.

  With reference to FIGS. 10 and 11, the overhanging portion 124 includes a first overhanging member 124a and a second overhanging member 124b. The outer material 12a has a first overhang member 124a. The first overhanging member 124a is arranged at an end portion on the back portion 11 side of the outer material 12a. The center core 12b has a second overhang member 124b. The second projecting member 124b is arranged at the end of the core 12b on the back 11 side. The first overhanging member 124a and the second overhanging member 124b are configured to overhang on the side opposite to the inner core 12c.

  Referring to FIGS. 9 to 11, in the school bag 100 of the comparative example, since the projecting portion 124 projects outward from the side wall portion 123, the outer shape of the back portion 11 is larger than that of the side wall portion 123. Therefore, when the accommodation space IS surrounded by the side wall portion 123 becomes large, the outer shape of the back portion 11 also becomes large, so that the accommodation portion 1 becomes large. Therefore, it is difficult to increase the accommodation space IS while suppressing the accommodation portion 1 from increasing in size. Further, the overhanging portion 124 plays a role of reinforcing the housing portion 1. Therefore, it is difficult to secure the strength of the housing portion 1 unless the projecting portion 124 is provided in order to prevent the housing portion 1 from becoming large.

  On the other hand, according to the school bag 100 in the present embodiment, as shown in FIGS. 1 and 3, one of the center core 12b and the inner core 12c protrudes from the main body P1 to the side opposite to the outer surface 12a. It includes a protruding portion P2. Therefore, the protruding portion P2 does not protrude from the outer surface 12a to the outside. Therefore, since the outer shape of the back portion 11 is not larger than that of the gusset portion 12, the accommodation space IS can be increased while maintaining the size of the back portion 11. Therefore, it is possible to increase the accommodation space IS while suppressing the accommodation portion 1 from increasing in size. In addition, the gusset portion 12 includes a center core 12b and an inner core 12c. Therefore, the strength of the housing portion 1 can be ensured by both the inner core 12b and the inner core 12c. Further, the main body portion P1 and the protruding portion P2 are supported by the back portion 11. Therefore, the strength of the accommodating portion 1 can be ensured by the main body portion P1 and the protruding portion P2.

  In addition, the gusset portion 12 includes a center core 12b and an inner core 12c. Therefore, the strength of the inner core 12b and the inner core 12c can be adjusted separately. Therefore, the strength of the housing portion 1 can be easily adjusted.

  Further, according to the school bag 100 of the present embodiment, since the back portion 11 is sandwiched by the bent portion P3 and the protruding portion P2 of the outer material 12a, the corner material 8 of the comparative example is not necessary. Since the corner material 8 which is a member different from the outer material 12a is unnecessary, the number of members can be reduced. Therefore, productivity can be improved.

  In addition, referring to FIGS. 1 and 4, school bag 100 in the present embodiment includes a reinforcing member 5. Therefore, the reinforcing member 5 can further secure the strength of the housing portion 1.

  Referring to FIGS. 1 and 3, according to school bag 100 in the present embodiment, inner core 12c includes a protrusion P2. For this reason, it becomes easy to sandwich the inner core 12b between the inner core 12c and the outer material 12a and sew each other.

  According to the school bag 100 in the present embodiment, the core 12b may have a higher bending rigidity than the inner core 12c. This makes it easy to secure the strength of the housing portion 1 by the core 12b.

  Next, the school bags 100 of Modification 1 and Modification 2 of the present embodiment will be described.

  With reference to FIGS. 12 and 13, a school bag 100 according to a first modification of the present embodiment will be described. In the school bag 100 of the first modification of the present embodiment, the configurations of the core 12b and the inner core 12c are mainly different from those of the school bag 100 of the present embodiment described above.

  In the school bag 100 of the first modification of the present embodiment, the center core 12b includes a main body portion P1 and a protruding portion P2. The protruding portion P2 is configured to protrude from the main body portion P1 to the side opposite to the outer material 12a beyond the inner core 12c. A bent portion is provided on the rear side of the center core 12b. The bent portion of the center core 12b is in contact with the inner surface of the back portion 11. The inner core 12c is supported by the protruding portion P2 of the middle core 12b. The inner core 12c is pierced straight against the inner surface of the protrusion P2. That is, the inner core 12c does not include the protruding portion P2.

  Referring to FIG. 12, the outer edge portion 11a of the back portion 11 is sandwiched by the bent portion P3 of the outer material 12a and the protruding portion P2 of the center core 12b. With the outer edge portion 11a of the back portion 11 sandwiched by the bent portion P3 of the outer material 12a and the protruding portion P2 of the inner core 12b, the outer edge portion 11a of the outer material portion 12a, the outer edge portion 11a of the outer material 11a, and the inner core portion 12b. The projecting portion P2 is sewn integrally with the thread 6. The outer material 12 a, the main body P 1 of the core 12 b, and the inner core 12 c are integrally sewn with the thread 7.

  With reference to FIG. 13, the reinforcing member 5 and the protruding portion P2 of the center core 12b sandwich the bent portion P3 of the outer material 12a and the outer edge portion 11a of the back portion 11 with the reinforcing member 5 and the outer material 12a. The bent portion P3, the outer edge portion 11a of the back portion 11, and the protruding portion P2 of the inner core 12c are integrally sewn with the thread 6. The reinforcing member 5, the outer material 12 a, the main body P 1 of the center core 12 b, and the inner core 12 c are integrally sewn with the thread 7.

  According to the school bag 100 of the first modification of the present embodiment, the core 12b includes the protrusion P2. For this reason, it is possible to prevent the center core 12b from coming off from the inner surface of the back portion 11 to the outside and entering between the back portion 11 and the dress material 12a. Thereby, the strength of the housing portion 1 can be secured. Further, the inner core 12c is supported by the protruding portion P2 of the middle core 12b. Therefore, the inner core 12c can prevent the main body P1 and the protruding portion P2 of the center core 12b from being deformed so as to approach each other. Thereby, the strength of the housing portion 1 can be secured.

  With reference to FIGS. 14 and 15, a school bag 100 according to a second modification of the present embodiment will be described. The school bag 100 of the second modification of the present embodiment mainly differs from the school bag 100 of the present embodiment described above in that it is provided with a lining 30.

  The backpack 100 of the second modification of the present embodiment includes a lining 30. The lining 30 is arranged inside the inner core 12c. The lining 30 covers the inner core 12c. The lining 30 covers the threads 6 and 7. The lining 30 is not sewn with the threads 6 and 7. Further, the lining 30 is arranged inside the back portion 11. The lining 30 covers the inner surface of the back portion 11.

  The school bag 100 of the modification 1 in this Embodiment is further provided with the lining arrange | positioned inside the inner core 12c. Therefore, it is possible to prevent the inner core 12c from being damaged by the textbook or the like accommodated in the accommodating portion 1 coming into contact with the inner core 12c. Thereby, the strength of the housing portion 1 can be secured.

  The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

  1 housing part, 2 lid part, 3 belt, 4 connecting member, 5 reinforcing member, 6,7 thread, 11 back part, 11a outer edge part, 12 gusset part, 12a outer material, 12b middle core, 12c inner core, 13 front part, 30 lining, 100 school bag, 121 side part, 122 bottom part, 123 side wall part, 124 overhang part, IS accommodating space, OP opening part, P1 main body part, P2 protruding part, P3 bent part.

Claims (3)

A housing portion provided with an opening,
A lid part connected to the accommodation part so that the opening part can be opened and closed,
A pair of backpack belts connected to the accommodating portion,
The housing portion includes a back portion to which one end of each of the pair of backpack belts is connected and the lid portion is connected, and a gusset portion connected to an outer edge portion of the back portion,
The gusset portion is a surface material, a core having a higher bending rigidity than the surface material and arranged inside the surface material, and an inner core having a bending rigidity higher than the surface material and arranged inside the center material. Including,
Only one of the inner core and the inner core includes a main body portion, and a protruding portion that protrudes from the main body portion to the opposite side of the front material,
The main body portion and the protruding portion are supported by the back portion ,
The inner core includes the protrusion,
The school bag in which the bent portion of the inner core is in contact with the inner surface of the back portion, and the inner core is straightly butted against the inner surface of the back portion . The school bag according to claim 1, wherein the middle core has a higher bending rigidity than the inner core. The school bag according to claim 1 or 2 , further comprising a lining arranged inside the inner core.

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