Patent ID: 8064971

Claim:
A mobile phone in which a first substrate and a second substrate are connected relatively movably to each other, comprising: a first casing removably fitted to said first substrate; a second casing separated from said first casing and removably fitted to said second substrate; and a slip-off prevention section for fixing said first casing to said first substrate, and fixing said second casing to said second substrate, wherein said slip-off prevention section further comprises, a first locking pawl provided retractably in said first substrate, a first spring section supporting said first locking pawl, a second locking pawl provided retractably in said second substrate, and a second spring section supporting said second locking pawl; and a first locking hole, in which said first locking pawl engages, is formed in said first casing, and a second locking hole, in which said second locking pawl engages, is formed in said second casing, such that when compressed by said first casing, said first locking pawl retracts while elastically deforming said first spring section, said first casing being supported by said first locking pawl advancing into said first locking hole through decompression of said first spring section, and when compressed by said second casing, said second locking pawl retracts while elastically deforming said second spring section, said second casing being supported by said second locking pawl advancing into said second locking hole through decompression of said second spring section.