Abstract: Disclosed herein is a removable device case in which a plurality of rails formed in a main body thereof is assembled to a sliding coupling member such that the case can be completely combined. The removable device case can easily hold a device by coupling a rail part formed on one surface of the main body to a separate coupling member. In addition, disclosed herein is a case coupling structure that enables the external design of the device to be easily changed according to users' preferences and enables the device to be stably enclosed and protected so as not to be easily separated from the case even through severe vibration and impact are applied to the device from the outside.

Abstract: A flip-type protection case for portable electronic device of the present invention has a flexibility and thus provides improved grip feeling, and end portions of the protection case do not cause soreness to a hand and thus the protection case is convenient is to be used. The flip-type protection case for portable electronic device of the present invention includes a rear cover part (100) covering a rear face of the portable electronic device; and a front cover part (300) connected to the rear cover part (100) by a connection part (200) and covering a front face of the portable electronic device, wherein a core material (430) is embedded between a pair of skins (410, 420) at least in the front cover part (300) of the rear cover part (100) and the front cover part (300), and wherein the core material (430) is a sheet formed of rubber or thermoplastic elastomer.