Patent ID: 7937012

Claim:
An angle adjusting device configured to support an operations panel so that up and down rotation of the operations panel against an apparatus main body can be made in a designated angle range and configured to adjust a rotational angle of the operations panel in up and down directions against the apparatus main body, the angle adjusting device comprising: a fixing member fixed to the apparatus main body; a rotation member where the operations panel is provided, the rotation member being provided to the fixing member so as to be rotated with respect to a designated rotation shaft in the designated angle range; a lock mechanism configured to lock rotation of the rotation member against the fixing member with respect to the rotation shaft, at one or more parts in the designated angle range, by using a force other than a frictional force between the fixing member and the rotation member; and a setting mechanism configured to set a lock-on state and lock-off state of the lock mechanism, wherein the setting mechanism includes a lock-off lever moving in a designated direction and a slide lever moving connected with movement of the lock-off lever; the lock mechanism includes a lock pin provided at the slide lever and a plate member where a plurality of lock holes is arranged; the lock holes face the lock pin; and the lock pin is engaged with the lock holes along a circumference of a circle whose center is a center of the rotation shaft.