Input device attachment techniques are described. In one or more implementations, a device includes a portion (e.g., an input portion or cover) is configured to be positioned over a display device of a computing device to cover the display device. The device also includes a spine (e.g., a mid-spine) that is physically attached to the portion in a manner that supports rotational movement of the portion in relation to the display device. The physical attachment of the spine is configured to be removable using a magnetic coupling between the spine and a surface of the computing device that includes the display device.

A hinge assembly includes a fixed frame, a shaft, a rotatable frame and a cover. The shaft is rotatably disposed on the fixed frame. The rotatable frame is fixed to the shaft, and the rotatable frame has a first positioning structure. The cover is at least partially located between the rotatable frame and the fixed frame and sleeved on the shaft. The fixed frame or the cover has at least one second positioning structure, and the first positioning structure and the at least one second positioning structure are cooperated with each other so as to limit a rotatable range of the rotatable frame.

A hinge assembly includes a fixed frame, a shaft, a rotatable frame and a cover. The shaft is rotatably disposed on the fixed frame. The rotatable frame is fixed to the shaft, and the rotatable frame has a first positioning structure. The cover is at least partially located between the rotatable frame and the fixed frame and sleeved on the shaft. The fixed frame or the cover has at least one second positioning structure, and the first positioning structure and the at least one second positioning structure are cooperated with each other so as to limit a rotatable range of the rotatable frame.