Pull rod-type foldable chair structure comprising a front chair leg, a rear chair leg, a seat, a back, two pull rods, two support boards and ground-contacting blocks, wherein:
- the bottom transverse beam of the front chair leg is provided with ground-contacting blocks and ground-contacting block seat bodies coupled with the ground-contacting blocks, via a pivot member, an inner side of middle section of the front chair leg being pivotally connected with a pivot hole near a middle section of the support board, one side of upper section of the front chair leg being formed with engaging holes for engaging with the back, via a pivot member, an outer side of the front chair leg between the pivot member and the back being pivotally connected with the pull rod inserted in a top section of the rear chair leg;
- the pull rod is telescopically inserted in the top end of the rear chair leg, the pull rod being pivotally connected with the front chair leg, the bottom transverse beam of the rear chair leg being provided with ground-contacting blocks and ground-contacting block seat bodies coupled with the ground-contacting blocks, the rear chair leg being provided with a pivot board which via a pivot member is pivotally connected with a pivot hole of the rear section of the support board assembled with the seat;
- the bottom of two sides of the seat is formed with insertion grooves, the insertion hooks of the two lateral support boards being inserted in the insertion grooves, the lateral walls of the support boards being formed with through holes, fixing members being passed through the through holes to fix the support boards with the seat;
- an inner edge of bottom wall of the support board is bent to form an insertion wall for inserting into the insertion groove of the seat, the support board being formed with two through holes for fixing the seat and a pivot hole for pivotally connecting with the front chair leg and a pivot hole for pivotally connecting with the pivot board of the rear chair leg;
- two sides of the back are formed with assembling cavities for two lateral leg rods of the front chair leg to insert therein, a resilient engaging member being disposed in each assembling cavity, the engaging member being engaged in the engaging hole of the leg rod of the front chair leg, whereby the back can be quickly and easily assembled with the front chair leg;
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- the upper end of the pull rod is a pivot head formed with a pivot hole for pivotally connecting with the pivot member of the front chair leg, a front lower edge of the pivot head being formed with a locating recess, a rear end of the pivot head being formed with a locating projecting block, whereby the locating projecting block of the pivot head of the pull rod of one foldable chair can be placed and located in the locating recess of the pivot head of the pull rod of another foldable chair.