Linear encoder
First Claim
1. A linear encoder comprising:
- a plate-type scale with graduations formed on a surface of the scale so as to be arranged along a longitudinal direction of the scale; and
a head configured to move along the longitudinal direction of the scale, the head having a reading part configured to detect an amount of a relative movement of the head with respect to the scale by reading the graduations formed on the scale, whereinthe head includes a spacer configured to maintain a distance between the scale and the head by abutting against a surface of the scale,the scale includes a plate member interposed between the reading part and the graduations,the spacer is situated on the head so as to abut against a surface of the plate member, andthe graduations are in direct contact with the plate member.
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Accused Products
Abstract
A linear encoder includes a plate-type scale and a head which moves along the longitudinal direction of the scale. The scale has graduations formed on a surface of the scale and arranged along the longitudinal direction of the scale. The head includes a reading part which detects an amount of a relative movement of the head with respect to the scale by reading graduations formed on the scale. The head includes four bearings each having a rotation axis extending along the transverse direction of the scale. Each of the bearings is situated on the head so as to abut against a surface of the scale, to function as a spacer to maintain a distance between the scale and the head. The scale acts as a plate member interposed between the reading part and the graduations.
14 Citations
6 Claims
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1. A linear encoder comprising:
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a plate-type scale with graduations formed on a surface of the scale so as to be arranged along a longitudinal direction of the scale; and a head configured to move along the longitudinal direction of the scale, the head having a reading part configured to detect an amount of a relative movement of the head with respect to the scale by reading the graduations formed on the scale, wherein the head includes a spacer configured to maintain a distance between the scale and the head by abutting against a surface of the scale, the scale includes a plate member interposed between the reading part and the graduations, the spacer is situated on the head so as to abut against a surface of the plate member, and the graduations are in direct contact with the plate member. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification