Position detection device

A position detection device that detects a plurality of five positions of an operating unit, the position detection device comprising:

• a detection target unit displaceable along with the operating unit between the plurality of five positions;
• a first detection system and a second detection system that are distinct from each other, the first and second detection systems are powered by one or more power supply systems, and the first and second detection systems are stationary relative to the operating unit and the detection target unit;
• and
• wherein the first detection system includes a first detector, a second detector, and a third detector, the first, second, and third detectors each have a detection function with one bit having a first value and a second value, each of the first, second, and third detectors are configured to output one of the first value or the second value in accordance with a positional relationship of the first, second, and third detectors, respectively, relative to the detection target unit, and the first detection system is configured to output a plurality of first detection patterns with three digits, each one of the plurality of first detection patterns is in accordance with one of the plurality of five positions, each one of the plurality of first detection patterns is based on the first or second values output by the first, second, and third detectors, respectively, when the detection target unit and the operating unit are in one of the plurality of five positions,
• wherein the second detection system includes a fourth detector, a fifth detector, and a sixth detector, the fourth, fifth, and sixth detectors each have a detection function with one bit having the first value and the second value, each of the fourth, fifth, and sixth detectors are configured to output one of the first value or the second value in accordance with a positional relationship of the fourth, fifth, and sixth detectors, respectively, relative to the detection target unit, and the second detection system is configured to output a plurality of second detection patterns with three digits, each one the plurality of second detection patterns is in accordance with one of the plurality of five positions, each one of the plurality of second detection patterns is based on the first or second values output by the fourth, fifth, and sixth detectors, respectively, when the operating unit and the detection target unit are in one of the plurality of five positions,
• wherein three predetermined positions among the plurality of five positions are common to the first detection system and the second detection system, in each of the three predetermined positions of the plurality of five positions one digit is set to be different from two other digits among the three digits in three respective first detection patterns of the plurality of first detection patterns, each one of the three respective first detection patterns of the plurality of first detection patterns corresponds to one of the three predetermined positions, and each one of the three respective first detection patterns of the plurality of first detection patterns is different from others of the three respective first detection patterns of the plurality of first detection patterns corresponding to the three predetermined positions, respectively,
• wherein in each of the three predetermined positions among the plurality of five positions one digit is set to be different from two other digits among the three digits in three respective second detection patterns of the plurality of second detection patterns, each one of the three respective second detection patterns of the plurality of second detection patterns corresponds to one of the three predetermined positions, and each one of the three respective second detection patterns of the plurality of second detection patterns is different from others of the three respective second detection patterns of the plurality of second detection patterns corresponding to the three predetermined positions, respectively,
• wherein two remaining predetermined positions among the plurality of five positions are common to the first detection system and the second detection system among the plurality of five positions, in each of the two remaining predetermined positions of the plurality of five positions the three digits of the plurality of first detection patterns are set to be identical to each other, each one of the two respective first detection patterns of the plurality of first detection patterns corresponds to one of the two remaining predetermined positions of the plurality of five positions, and the two respective first detection patterns of the plurality of first detection patterns corresponding to the two remaining predetermined positions are different from each other,
• wherein in each of the two remaining predetermined positions among the plurality of five positions the three digits of two respective second detection patterns of the plurality of second detection patterns are set to be identical to each other, each one of the two respective second detection patterns of the plurality of second detection patterns corresponds to one of the two remaining predetermined positions of the plurality of five positions, and the two respective second detection patterns of the plurality of second detection patterns corresponding to the two remaining predetermined positions are different from each other, and
• wherein in any of the two remaining predetermined positions of the plurality of five positions, a corresponding first detection pattern of the two respective first detection patterns of the plurality of first detection patterns is different from a corresponding second detection pattern of the two respective second detection patterns of the plurality of second detection patterns.