Unit and optical device
AssigneeCanon Kabushiki Kaisha
InventorShunsuke KUBOYAMA
Life of this patent
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Abstract
A unit includes a first component and a second component. One of the first component and the second component is movable with respect to the other of the first component and the second component. A lubricant is provided between the first component and the second component. A first surface of the first component includes a first region, a second region, and a third region. The first region is slidable on the second component with the lubricant therebetween. The second region is provided between the first region and the third region along the first surface. The second region has a concavo-convex structure. An arithmetic mean roughness of the third region at a sampling length of 700 μm is 0.01 μm or more and 0.55 μm or less.
Claims18
A unit comprising a first component and a second component,
- wherein one of the first component and the second component is movable with respect to the other of the first component and the second component,
- wherein a lubricant is provided between the first component and the second component,
- wherein a first surface of the first component includes a first region, a second region, and a third region,
- wherein the first region is slidable on the second component with the lubricant therebetween,
- wherein the second region is provided between the first region and the third region along the first surface,
- wherein the second region has a concavo-convex structure including a plurality of protrusions and/or a plurality of recesses,
- wherein a distance between two adjacent protrusions in the plurality of protrusions and/or a distance between two adjacent recesses in the plurality of recesses is 80 μm or less,
- wherein a height of each of the plurality of protrusions and/or a depth of each of the plurality of recesses in the concavo-convex structure is 1 μm or more,
- wherein a width of each of the plurality of protrusions and/or a width of each of the plurality of recesses in the concavo-convex structure is 100 μm or less, and
- wherein an arithmetic mean roughness of the third region at a sampling length of 700 μm is 0.01 μm or more and 0.55 μm or less.
A unit comprising a first component and a second component,
- wherein one of the first component and the second component is movable with respect to the other of the first component and the second component,
- wherein a lubricant is provided between the first component and the second component,
- wherein a first surface of the first component includes a first region, a second region, a third region, and a fourth region,
- wherein the first region is slidable on the second component with the lubricant therebetween,
- wherein along the first surface, the second region is provided between the first region and the third region, and the fourth region is provided between the first region and the second region,
- wherein the second region has a concavo-convex structure including a plurality of protrusions and/or a plurality of recesses,
- wherein an arithmetic mean roughness of the third region at a sampling length of 700 μm is smaller than an arithmetic mean roughness of the second region at a sampling length of 700 μm, and
- wherein an arithmetic mean roughness of the fourth region at a sampling length of 700 μm is smaller than the arithmetic mean roughness of the second region and larger than an arithmetic mean roughness of the first region at a sampling length of 700 μm.
Dependencies are inferred from the claim text.