A portable device comprising: an exterior member comprising a front exterior surface, a back exterior surface, and an inner surface configured to define a hollow interior; a plurality of support parts provided in the hollow interior of the exterior member, wherein each of the plurality of support parts extends in a direction perpendicular to the front exterior surface or the back exterior surface of the exterior member; an inner member provided in the hollow interior of the exterior member; and a plurality of buffer members, wherein each of the plurality of buffer members is provided around a corresponding one of the plurality of support parts, wherein the plurality of buffer members are configured to buffer the inner member from being in contact with the exterior member, characterized in that the each of the plurality of buffer members comprises: - a main part provided around the corresponding one of the plurality of support parts, wherein the main part has a shape conforming to a corresponding portion of the inner surface of the exterior member perpendicular to the front exterior surface or the back exterior surface of the exterior member, and wherein the main part is in elastic contact with the corresponding portion of the inner surface of the exterior member; and - a protrusion extending from the main part in a direction following another corresponding portion of the inner surface of the exterior member perpendicular to the front exterior surface or the back exterior surface of the exterior member, and wherein the protrusion is in additionally elastic contact with the another corresponding portion of the inner surface of the exterior member. an exterior member comprising a front exterior surface, a back exterior surface, and an inner surface configured to define a hollow interior; a plurality of support parts provided in the hollow interior of the exterior member, wherein each of the plurality of support parts extends in a direction perpendicular to the front exterior surface or the back exterior surface of the exterior member; an inner member provided in the hollow interior of the exterior member; and a plurality of buffer members, wherein each of the plurality of buffer members is provided around a corresponding one of the plurality of support parts, wherein the plurality of buffer members are configured to buffer the inner member from being in contact with the exterior member, characterized in that the each of the plurality of buffer members comprises: - a main part provided around the corresponding one of the plurality of support parts, wherein the main part has a shape conforming to a corresponding portion of the inner surface of the exterior member perpendicular to the front exterior surface or the back exterior surface of the exterior member, and wherein the main part is in elastic contact with the corresponding portion of the inner surface of the exterior member; and - a protrusion extending from the main part in a direction following another corresponding portion of the inner surface of the exterior member perpendicular to the front exterior surface or the back exterior surface of the exterior member, and wherein the protrusion is in additionally elastic contact with the another corresponding portion of the inner surface of the exterior member. - a main part provided around the corresponding one of the plurality of support parts, wherein the main part has a shape conforming to a corresponding portion of the inner surface of the exterior member perpendicular to the front exterior surface or the back exterior surface of the exterior member, and wherein the main part is in elastic contact with the corresponding portion of the inner surface of the exterior member; and - a protrusion extending from the main part in a direction following another corresponding portion of the inner surface of the exterior member perpendicular to the front exterior surface or the back exterior surface of the exterior member, and wherein the protrusion is in additionally elastic contact with the another corresponding portion of the inner surface of the exterior member.