Original reading unit, image forming apparatus and image scanner
First Claim
1. An original reading unit comprising:
- a unit base;
a transparent original support plate attached to the unit base; and
multiple sensor assemblies arranged, in a zigzag pattern, to form on the unit base a first array, extended in a main scanning direction, for performing the first reading of an original, and a second array, also extended in the main scanning direction, for reading the original following the first array, wherein each of the sensor assemblies includes a sensor holder, which, as a fulcrum, can be pivoted at a single rotation center, along a wall of the unit base, to a predetermined position and fixed to the wall, a line sensor, which is held, relative to the sensor holder, so as not to be shifted in the main scanning direction or in the sub-scanning direction and which is movable, in an approaching or a separating direction, so as to be brought into contact with and separated from the wall and the original support plate, and a focus setup unit, which moves the line sensor in the approaching or separating direction and which positions the line sensor at a location whereat focus can be adjusted.
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Accused Products
Abstract
According to the present invention, between a unit base and a transparent original support plate, multiple sensor assemblies are arranged, to form a zigzag pattern, as a first array for reading an original and a second array for reading the original following the first array. Each of the sensor assemblies includes a sensor holder, a line sensor and a focus setup unit. Each of the sensor holders, which serve as fulcrums, are rotatable at a single pivot (a rotation center), along the wall of a unit base that is parallel to the original support plate. When the sensor holders are rotated and positioned at predetermined locations, they are fixed to the wall. The line sensors 51 are held, relative to the sensor holders, in the main scanning direction and in the sub-scanning direction, and are moved in an approaching or separating direction in which the line sensors approach or are separated from the wall and the original support plate. The focus setup units, each of which includes coil springs and spacers, move the line sensors 51 in the approaching or separating direction, and position the line sensors 51 at locations whereat focuses are adjusted.
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Citations
9 Claims
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1. An original reading unit comprising:
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a unit base;
a transparent original support plate attached to the unit base; and
multiple sensor assemblies arranged, in a zigzag pattern, to form on the unit base a first array, extended in a main scanning direction, for performing the first reading of an original, and a second array, also extended in the main scanning direction, for reading the original following the first array, wherein each of the sensor assemblies includes a sensor holder, which, as a fulcrum, can be pivoted at a single rotation center, along a wall of the unit base, to a predetermined position and fixed to the wall, a line sensor, which is held, relative to the sensor holder, so as not to be shifted in the main scanning direction or in the sub-scanning direction and which is movable, in an approaching or a separating direction, so as to be brought into contact with and separated from the wall and the original support plate, and a focus setup unit, which moves the line sensor in the approaching or separating direction and which positions the line sensor at a location whereat focus can be adjusted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification