Linear motion guide unit

A linear motion guide unit comprising:

• a guide rail having a first lengthwise raceway groove thereon, and a slider having a carriage made therein with a second raceway groove in opposition to the first raceway groove, the slider being allowed to move lengthwise of the guide rail by virtue of a plurality of rolling elements,
• wherein the carriage includes a tubular member having a return passage which allows the rolling element to roll through the return passage,
• a cartridge having a cellular structure which forms a lubricant reservoir that maintains a lubricant therein which oozes through the cartridge into a leading member,
• wherein the tubular member has a cellular structure adapted to be impregnated with the lubricant which is sequentially applied to the tubular member to lubricate the rolling members, and
• wherein the leading member serves to move the lubricant directly from the lubricant reservoir to the tubular member,
• wherein the cartridge of the lubricant reservoir is made of a sintered resin shaped in a tubular construction,
• wherein the leading member is constituted with a sintered resin of cellular structure and abuts against the outside surface of the cartridge and the outside surface of the tubular member so as to be spaced apart from the rolling elements, and
• wherein the carriage has holes to respectively receive the tubular member, lubricant reservoir and leading member.