Abstract: An image forming apparatus includes a case formed with a front face and a top face, a first accommodating portion formed in the case, an imaging unit that forms an image on a recording medium; the imaging unit being accommodated in the first accommodating portion detachably, and a front cover provided at the front face, the front cover being movable between a first position to open the accommodating portion and a second position to close the accommodating portion, the imaging unit being attached to and removed from the accommodating portion when the front cover is at the first position. The front cover is formed with a round portion.

Abstract: An image forming apparatus includes: an image forming unit that forms an image on a recording sheet; an image reading unit provided above the image forming unit so as to open and close with respect to the image forming unit; an automatic document feeder provided above the image reading unit so as to open and close with respect to the image reading unit; and an open-close regulation mechanism that regulates opening and closing movements of the automatic document feeder so that when the image reading unit is closed with respect to the image forming unit, the automatic document feeder is capable of opening with respect to the image reading unit, and when the image reading unit is opened with respect to the image forming unit, the automatic document feeder is prevented to open with respect to the image reading unit.

Abstract: A tape cassette has a prohibiting member which prevents the tape cassette from being loaded into a tape printing device without a mode appropriate for the tape cassette. When an operator tries to load the tape cassette into a printing device without a mode for the tape cassette, a prohibiting member provided on the main body of the tape cassette abuts an installation member of the tape printing device thus preventing improper loading. The prohibiting member also has a function as a reinforcement member and a positioning member for reinforcing the cassette case and ensuring proper loading in the device.