Display unit attachment device

A portable apparatus comprising:

• a base unit including a front upper surface and a rear portion having a socket attaching portion, a socket storing surface and a shaft attaching portion;
• a socket attached to the socket attaching portion, the socket including an inner portion and a side wall having a socket shaft hole;
• a shaft device including a rotational shaft having a first end, a middle portion, a second end having a first engaging portion, and a shaft supporter fixed to the shaft attaching portion so as to pivotally support the first end such that the second end projects into the socket inner portion and the middle portion is in pivotal supporting contact with the socket shaft hole;
• a display unit including a display and a leg removably attached to the socket inner portion, the leg having a second engaging portion engaging the first engaging portion whenever the leg is disposed within the socket inner portion, the display being rotatable between a closed position for covering the front upper surface and an open position for viewing the display, the rotation of the display unit causing rotation of the rotational shaft;
• and
• a coil spring wound around the rotational shaft so as to generate a biasing force for biasing the display unit toward the open position whenever the display unit is in the closed position, the biasing force being applied directly to the leg through the rotational shaft and indirectly to the socket through the leg portion.

A portable apparatus comprising:

• a base unit including a front portion having a keyboard and a rear portion having a socket storing surface an a socket attaching portion;
• a socket pivotally attached to the socket attaching portion;
• a display unit including a leg portion removably attached to the socket, the display unit being rotatable between a closed position for covering the keyboard and an open position for operating the apparatus when the leg portion is attached to the socket;
• a biasing means connected to the base unit for generating a biasing force for biasing the display unit toward the open position;
• and
• transmitting means for directly transmitting the biasing force to the leg portion and indirectly transmitting the biasing force to the socket through the leg portion when the leg portion is attached to the socket, the biasing force acting on the socket being released by removing the leg portion from the socket.