| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of enlarging rotation type encoder in the direction of the rotational axis since the common pattern 57a and cord pattern 57b are arranged in parallel in the direction of the rotational axis on the outer circumference of rotational body 55. SOLUTION: In the rotation type encoder, a code pattern 9b is arranged on the circumference face of the rotational body 8 and a common pattern 9a electrically connected to the code pattern 9b is arranged in the end face 8e of the rotational body 8.
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