Abstract: According to one embodiment, an electronic apparatus includes a first casing, a second casing, and a hinge which couples them rotatably from a first state to a second state. The hinge includes a first shaft, a first rotation engaging portion, a second shaft, a second rotation engaging portion, a housing, and a transmission unit. The transmission unit links the first engaging portion and the second engaging portion and rotates them with respect to a rotation angle of the housing from the first state to the second state.

Abstract: According to one embodiment, an electronic apparatus includes a first casing, a second casing, and a hinge which couples them rotatably from a first state to a second state. The hinge includes a first shaft, a first rotation engaging portion, a second shaft, a second rotation engaging portion, a housing, and a transmission unit. The transmission unit links the first engaging portion and the second engaging portion and rotates them with respect to a rotation angle of the housing from the first state to the second state.

Abstract: According to one embodiment, an electronic apparatus includes a first casing, a second casing, and a hinge which couples them rotatably from a first state to a second state. The hinge includes a first shaft, a first rotation engaging portion, a second shaft, a second rotation engaging portion, a housing, and a transmission unit. The transmission unit links the first engaging portion and the second engaging portion and rotates them with respect to a rotation angle of the housing from the first state to the second state.

Abstract: According to one embodiment, an electronic device includes a device body which includes a main system unit and an option unit detachably connected to the main system unit. The main system unit includes a first housing including a first connection side surface and a first engagement portion at the first connection side surface, and a main control circuit board in the first housing. The option unit includes a second housing including a second connection side surface opposing to the first connection side surface of the first housing and a second engagement portion at the second connection side surface, an option device at the second housing, and a lock mechanism configured to lock the second housing, and a release member configured to release from locking.

Abstract: A brake lever connected to a brake system of a bicycle includes a metal arm having a pivoted end connected to the brake system and a handle portion with a distal end. A rigid plastic coating layer fully covers the handle portion, the coating layer having a first thick portion adjacent to the pivoted end, and a thin portion. A shoulder is formed between the thick and thin portions. A flexible plastic coating layer covers the thin portion and is flush with the thick portion of the rigid plastic coating layer.