Linear guideway, sliding module thereof, and circulation seat thereof

A sliding module of a linear guideway, comprising:

• a slider including a base portion and two lateral portions that extend from the base portion;
• and
• two circulation seats respectively assembled to the two lateral portions, wherein each of the two circulation seats has two rolling channels and including:
• two turning segments respectively protruding from two assembling end surfaces of the slider, wherein any one of the two turning segments has two outer arced sub-segments and two inner arced sub-segments that are respectively connected to the two outer arced sub-segments, and wherein each of the outer arced sub-segments has a first radius, and each of the inner arced sub-segments has a second radius that is within a range from 90% to 110% of the first radius;
• two outer rail segments inserted into the corresponding lateral portion of the slider, wherein two ends of each of the two outer rail segments are respectively connected to two of the outer arced sub-segments that respectively belong to two of the turning segments;
• and
• two inner rail segments located between the two lateral portions of the slider, wherein two ends of each of the two inner rail segments are respectively connected to two of the inner arced sub-segments that respectively belong to two of the turning segments;
• wherein, in each of the two circulation seats, each of the two outer rail segments is in spatial communication with one of the two inner rail segments through the two turning segments so as to jointly define one of the rolling channels.

A circulation seat of a linear guideway for being assembled to a slider and having two rolling channels, the circulation seat comprising:

• two turning segments each having two outer arced sub-segments and two inner arced sub-segments that are respectively connected to the two outer arced sub-segments, wherein each of the outer arced sub-segments has a first radius, and each of the inner arced sub-segments has a second radius that is within a range from 90% to 110% of the first radius;
• two outer rail segments each having two ends respectively connected to two of the outer arced sub-segments that respectively belong to two of the turning segments;
• and
• two inner rail segments each having two ends respectively connected to two of the inner arced sub-segments that respectively belong to two of the turning segments;
• wherein each of the two outer rail segments is in spatial communication with one of the two inner rail segments through the two turning segments so as to jointly define one of the rolling channels.