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An electronic device storage case for use in storing a substrate therein, includes a hollow box-shaped case body. The case body includes an open surface with an opening, a bottom surface opposite to the opening and a sidewall extending upright from the peripheral edge of the bottom surface, wherein

An electronic device storage case for use in storing a substrate therein, includes a hollow box-shaped case body. The case body includes an open surface with an opening, a bottom surface opposite to the opening and a sidewall extending upright from the peripheral edge of the bottom surface, wherein the sidewall of the case body including a plurality of deformable ribs each having a slant surface inclined inwards toward the bottom surface, and wherein the substrate is introduced into the case body through the opening and slidingly moves along the slant surface of each of the deformable ribs to make pressure contact with the slant surface.

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1. An electronic device storage case for use in storing a substrate therein, comprising: a hollow box-shaped case body including an open surface with an opening, a bottom surface positioned opposite to the opening and a sidewall extending from a peripheral edge of the bottom surface, anda hollow box

1. An electronic device storage case for use in storing a substrate therein, comprising: a hollow box-shaped case body including an open surface with an opening, a bottom surface positioned opposite to the opening and a sidewall extending from a peripheral edge of the bottom surface, anda hollow box-shaped case cover detachably attached to the case body, the case cover including a panel portion, a sidewall extending from a peripheral edge of the panel portion, and a push rib protruded from the panel portion,wherein the case body further includes;a locking projection portion protruded from an outer surface of the sidewall of the case body, the locking projection portion including a slant surface inclined outwards and a locking surface formed between an outer end of the slant surface and the sidewall of the case body, anda fitting jut portion formed on the locking surface and inclined outwards and having a slant surface extending from the outer surface of the sidewall to the locking surface,wherein the case cover includes a locking hole portion formed through the sidewall of the case cover, the locking projection portion being inserted into and engaged with the locking hole portion when the case cover is attached to the case body, andwherein an inner surface of the locking hole portion is configured to slidingly move on the slant surface of the fitting jut portion when attaching the case cover to the case body and the slant surface of the fitting jut portion is configured to be pressed and crushed by an inner surface of the locking hole portion in a state where the case cover is attached to the case body, whereby a gap between the locking projection portion and the locking hole portion is filled with the fitting jut portion,wherein the slant surface of the fitting jut portion is continuously slanted from the outer surface of the sidewall to the locking surface, andwherein the fitting jut portion has a generally triangular cross-sectional shape. 2. The case of claim 1, wherein the case body further includes a support rib protruded from the bottom surface to support the substrate. 3. The case of claim 2, wherein the push rib is configured to be positioned opposite to the support rib when the case cover is attached to the case body. 4. The case of claim 1, wherein the push rib is configured to make contact with the substrate when the case cover is attached to the case body. 5. The case of claim 2, wherein the push rib is configured to make contact with the substrate when the case cover is attached to the case body. 6. The case of claim 1, wherein the sidewall of the case body includes a plurality of deformable ribs each having a slant surface inclined inwards toward the bottom surface, and wherein the substrate is introduced into the case body through the opening and slidingly moves along the slant surface of each of the deformable ribs to make pressure contact with the slant surface. 7. The case of claim 2, wherein the sidewall of the case body includes a plurality of deformable ribs each having a slant surface inclined inwards toward the bottom surface, and wherein the substrate is introduced into the case body through the opening and slidingly moves along the slant surface of each of the deformable ribs to make pressure contact with the slant surface. 8. The case of claim 3, wherein the sidewall of the case body includes a plurality of deformable ribs each having a slant surface inclined inwards toward the bottom surface, and wherein the substrate is introduced into the case body through the opening and slidingly moves along the slant surface of each of the deformable ribs to make pressure contact with the slant surface. 9. The case of claim 4, wherein the sidewall of the case body includes a plurality of deformable ribs each having a slant surface inclined inwards toward the bottom surface, and wherein the substrate is introduced into the case body through the opening and slidingly moves along the slant surface of each of the deformable ribs to make pressure contact with the slant surface. 10. The case of claim 1, wherein the locking projection portion has a substantially triangular cross-sectional shape.