Abstract: A battery pack provided with a battery block (3), a case (2), and a circuit board (4). The battery block (3) has a plurality of batteries (1) lined up in a horizontal row with the same orientation, and lead plates (5) connect to terminals of those batteries (1) to form a parallel unit (6). A plurality of parallel units (6) are stacked in the vertical direction with a different orientation, and battery terminals are connected by lead plates (5) in the vertical direction to connect parallel units (6) in series. Lead plates (5) have projections (10) which protrude horizontally beyond the confines of the battery block (3) and connect with the circuit board (4), and the battery block (3) and circuit board (4) are connected as a unit.

Abstract: The battery pack is provided with a battery block, a case, and a circuit board. The battery block has a plurality of batteries lined up in a horizontal row with the same orientation, and lead plates connect to terminals of those batteries to form a parallel unit. A plurality of parallel units are stacked in the vertical direction with different orientation, and battery terminals are connected by lead plates in the vertical direction to connect parallel units in series. Lead plates have projections which protrude horizontally beyond the confines of the battery block and connect with the circuit board, and the battery block and circuit board are connected as a unit.

Abstract: An electrophotographic copying machine includes a paper feeding tray and a paper discharging tray respectively attached to both end surfaces of a body, each of which has a first, a second and a third tray plates which are rotatably connected to each other. When the machine is not used, the first, second and third tray plates are contained in the body in a state where the same are collapsed and folded over each other and, when the machine is used, the first, second and third tray plates are withdrawn and developed. A plurality of ribs which are extended in a paper feeding direction are on one upper surface of the first plate attached to the body in a rotatable manner, and a plurality of through holes, or slits, which receive the ribs when the first, second and third tray plates are collapsed are formed on the second and third tray plates.