Sliding table

A sliding table, comprising:

• two main rigid rails extending along a lengthwise direction of the sliding table and parallel with each other;
• a screw rod extending along the lengthwise direction and disposed between said two main rigid rails;
• and
• a sliding seat including:
• a seat body made from a first material and disposed between said two main rigid rails, said seat body having a driving hole through which said screw rod extends, two opposite sides of the seat body, respectively, formed with rail recesses, wherein each of said rail recesses opens, respectively, toward a corresponding one of said two main rigid rails, and two inner cyclic track holes, wherein each of said two inner cyclic track holes is disposed between said driving hole and a corresponding one of said rail recesses;
• two seat body rigid rails, wherein each of said two seat body rigid rails is made from a second material harder than the first material, and each of said two seat body rigid rails being, respectively, fixed in a corresponding one of said rail recesses to, respectively, face a corresponding one of said two main rigid rails;
• two cyclic track members overmolded to said seat body, each of said two cyclic track members having an outer track section extending along a corresponding one of said rail recesses and further having an inner track section, each inner track section extending within a corresponding one of said two inner cyclic track holes, and two turnaround sections, respectively, disposed at two opposite ends of said outer track section of each of said two cyclic track members, each of said two turnaround sections connecting between one of said two opposite ends of said outer track section and a corresponding one of two opposite ends of said inner track section of each of said two cyclic track members;
• and
• two roller belt modules, each of said two roller belt modules is, respectively, arranged in a corresponding one of said two cyclic track members, each of said two roller belt modules including a belt made of a flexible material and a plurality of rollers held by said belt at predetermined intervals;
• wherein, when said seat body moves along said two main rigid rails, each of said two roller belt modules circulates along a corresponding one of said two cyclic track members by sequentially passing a corresponding outer track section, a corresponding one of said two turnaround sections, a corresponding inner track section, and a corresponding one of the other one of said two turnaround sections of a corresponding one of said two cyclic track members;
• wherein said rollers of each of said two roller belt modules roll between a corresponding one of said two main rigid rails and a corresponding one of said two seat body rigid rails, and said belt of each of said two roller belt modules slides along said outer track section of a corresponding one of said two cyclic track members;
• wherein each of said two cyclic track members is made from a plastic material;
• wherein said outer track section of each of said two cyclic track members has a top engagement bar and a bottom engagement bar, said top engagement bar and said bottom engagement bar being, respectively, formed at an upper side and a lower side of a corresponding one of said rail recesses, each of said top and bottom engagement bars being connected between said respective two turnaround sections, wherein each one of said two seat body rigid rails is exposed between said respective top and bottom engagement bars, and said belt of each of said two roller belt modules being in sliding engagement with said top and bottom engagement bars of said outer track section of a corresponding one of said two cyclic track members;
• and
• wherein each of said two seat body rigid rails has two first chamfered surfaces, respectively, adjacent to said two turnaround sections of a corresponding one of said two cyclic track members, and wherein each of said two turnaround sections of each of said two cyclic track members has a second chamfered surface cooperating with a corresponding one of said two first chamfered surfaces of one of said two seat body rigid rails to thereby form a contiguous smoothly-curved surface.