Electronic device comprising key for supporting haptic reaction

An electronic device comprising:

• a housing,
• a plurality of keys disposed at least partially in the housing and respectively comprising key caps configured to move in a stroke direction during a stroke,
• a first haptic actuator configured to generate vibration when at least one of the plurality of keys is stroked, and
• a haptic plate configured to be vibrated by the first haptic actuator and to vibrate the key cap of the at least one stroked key of the plurality of keys,
• wherein the key cap comprises:
• a base part,
• a side part connected to a peripheral portion of the base part, the side part comprising an external surface positioned at an outermost periphery of the key cap, and
• a recessed part formed in the external surface of the side part, and
• wherein the recessed part comprises a guide surface configured to guide the haptic plate and a seat surface connected to a top end of the guide surface,
• wherein the guide surface and the seat surface are configured to be separated from the haptic plate before the at least one key is stroked and the seat surface is configured to come in contact with at least a portion of the haptic plate when the at least one key is stroked.