Foldable chair

A foldable chair comprising:

• a support unit including a pivot base, a main support rod that is pivotally connected to and that extends through said pivot base, and at least two auxiliary support rods that are pivotally connected to and that extends trough said pivot base;
• a sliding base slidably sleeved on said main support rod;
• and
• a seat unit including
• a seating subunit that is pivotally connected to said sliding base, and
• a linkage subunit that includes a first linkage rod pivotally connected to said pivot base and pivotally connected to said seating subunit, said first linkage rod having an end that is opposite to said pivot base, said linkage subunit further including a second linkage rod having opposite ends that are respectively and pivotally connected to said first linkage rod and said sliding base, and a resilient member disposed between said pivot base and said first linkage rod;
• wherein via pivot movement between said seating subunit and said sliding base, pivot movement between said first linkage rod and said pivot base, pivot movement between said first linkage rod and said seating subunit, and sliding movement of said sliding base relative to said main support rod, said seating subunit is convertible between a folded state, where said seating subunit is folded to be substantially parallel to said main support rod, and where said first and second linkage rods are substantially parallel to said main support rod, and an expanded state, where said seating subunit is expanded to be transverse to said main support rod, and where said first linkage rod supports said seating subunit thereon for positioning said seating subunit relative to said main support rod;
• and
• wherein said resilient member is disposed for biasing said end of said first linkage rod away from said main support rod.