1. An image reading apparatus comprising:
a reading unit which reads an original on a platen from a lower side of the platen;
a guide extending in a scanning direction of said reading unit;
a moving unit on which said reading unit is mounted and which slides on said guide;
a rack extending in the scanning direction; and
a driving unit which is mounted on said moving unit and includes a pinion gear meshing with said rack,
wherein said rack is disposed between said pinion gear and said guide,
a slide contact portion between said guide and said moving unit includes a first slide contact portion on the rack side and a second slide contact portion spaced more apart from said rack than said first slide contact portion,
said first slide contact portion includes a first surface with one of said guide and said moving unit, said first surface being inclined so as to displace said moving unit toward said rack, and
said second slide contact portion includes a second surface with one of said guide and said moving unit, said second surface preventing said moving unit from being displaced toward said rack.
2. The apparatus according to claim 1, further comprising a biasing member which is provided on said moving unit and biases said reading unit against the platen side,
wherein said moving unit is biased toward the guide side by a reactive force of said biasing member.
3. The apparatus according to claim 1, wherein a slide contract portion between said guide and said moving unit comprises only said first contact slide portion and said second slide contact portion.
4. The apparatus according to claim 1, wherein said first slide contact portions and said second contact portions each are provided at two positions so as to be spaced apart from each other in the scanning direction.
5. The apparatus according to claim 4, wherein said second slide contact portions at the two positions are positioned such that a pressure angle direction at a meshing point between said pinion gear and said rack passes through said second slide contact portions at the two positions.
6. The apparatus according to claim 1, wherein said guide includes an upper surface, a first side surface on the rack side, a second side surface on a side opposite to said first side surface in a direction orthogonal to the scanning direction, and a curved surface connecting said upper surface to said first side surface,
said moving unit includes said first surface, with said curved surfaced of said guide slidely contacting said first surface, and
said second side surface of said guide includes said second surface, with said moving unit including a protruding portion slidely contacting said second surface.
7. A driving apparatus comprising:
a guide extending in a predetermined direction;
a moving unit which slides on said guide;
a rack extending in a direction in which said moving unit slides; and
a driving unit which is mounted on said moving unit and comprises a pinion gear meshing with said rack,
wherein said rack is disposed between said pinion gear and said guide,
a slide contact portion between said guide and said moving unit includes a first slide contact portion on the rack side and a second slide contact portion spaced more apart from said rack than said first slide contact portion,
said first slide contact portion includes a first surface with one of said guide and said moving unit, said first surface being inclined so as to displace said moving unit toward said rack, and
said second slide contact portion includes a second surface with one of said guide and said moving unit, said second surface preventing said moving unit from being displaced toward said rack.
8. The apparatus according to claim 1, wherein said second surface forms a vertical plane.
9. The apparatus according to claim 7, wherein said second surface forms a vertical plane.
10. A driving apparatus comprising:
a guide extending in a first direction;
a moving unit which moves along said guide;
a member having teeth extending in the first direction;
a driving unit having a motor and a gear meshing with said teeth to move said moving unit;
a first slide contact portion of said guide and said moving unit, having a first surface with one of said guide and said moving unit, the first surface being inclined with respect a second direction which is perpendicular to the first direction; and
a second slide contact portion of said guide and said moving unit, having a second surface with one of said guide and said moving unit, said second surface forming a vertical plane which is perpendicular to the second direction.
11. The apparatus according to claim 10, wherein said guide includes side surfaces and a curved surface on an upper side, and
said moving unit has the first surface slidely contacting with the curved surface of said guide, and said moving unit has a protruding portion slidably contacting with one of the side surfaces of said guide.
12. The apparatus according to claim 11, wherein said guide and said member are integrally formed as one component and said driving unit is provided on the moving unit.
13. The apparatus according to claim 10, wherein contact at said first slide contact portion causes a biased force at said second slide contact portion to suppress displacement of said moving unit away from said guide in the second direction.
14. The apparatus according to claim 10, wherein said moving unit mounts an image sensor to read an original placed on a platen.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. Mobile, raised planting bed comprising a base portion comprising supporting wheels, a shell portion, and a shell insert, said shell insert adapted to contain growing plants and having drainage in the bottom thereof, said shell adapted to receive said shell insert and to receive water draining therefrom, and said shell also having a controlled water drainage system permitting said shell to be drained at the will of the user.