| 摘要 |
A SMALL-SIZED MOTOR INCLUDES A CYLINDRICAL BOTTOMED CASING (10), A BEARING MEMBER (22) ATTACHED ON A BOTTOM PORTION OF THE CASING, A ROTARY SHAFT (24) ROTATABLY SUPPORTED BY THE BEARING MEMBER; AND AN ARMATURE (41) WHICH ROTATES TOGETHER WITH THE ROTARY SHAFT, WHEREIN THE CASING INCLUDING A FIRST BOTTOM PORTION (11) HAVING A MOTOR MOUNT SURFACE (12) WHICH ABUTS ON AN APPARATUS WHEN THE SMALL-SIZED MOTOR IS MOUNTED ON THE APPARATUS, AND A SECOND BOTTOM PORTION (15) HAVING A BEARING MEMBER HOLDING PORTION (20) FOR HOLDING THE BEARING MEMBER THEREON AND POSITIONED MORE INSIDE IN A RADIAL DIRECTION OF THE CASING WITH RESPECT TO THE FIRST BOTTOM PORTION, THE SECOND BOTTOM PORTION BEING FORMED SO AS TO BE SUNKEN TOWARD THE ARMATURE THAN THE FIRST BOTTOM WITH A STEP PORTION (18) AS A BOUNDARY BETWEEN THE FIRST AND SECOND BOTTOM PORTIONS.
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