초록 ▼

A frame structure for a foldable chair comprises a front interconnecting supporting unit, a rear interconnecting supporting unit, a lateral interconnecting supporting unit, an armrest unit, a seat supporting unit, an armrest unit, and a transverse supporting rod. The front interconnecting supporting

A frame structure for a foldable chair comprises a front interconnecting supporting unit, a rear interconnecting supporting unit, a lateral interconnecting supporting unit, an armrest unit, a seat supporting unit, an armrest unit, and a transverse supporting rod. The front interconnecting supporting unit is installed with a front leg unit, a crisscrossed supporting unit. The rear interconnecting supporting unit comprises a rear leg unit, an arc-shaped supporting unit of which one end of each section is curved in shape. Each of the lateral interconnecting supporting unit includes two board members pivotally crisscrossed connected with each other between the front and rear leg unit. Beneath the armrest unit, a gliding rod is extending along thereof and a connecting joint is protruding there from. The transverse supporting rod is formed with a connecting plate, a rod and a connecting joint.

대표청구항 ▼

I claim: 1. A frame structure for a foldable chair comprising: an front interconnecting supporting unit having a front leg unit, a crisscrossed supporting unit installed thereon, wherein each of said front leg unit is composed of a upper portion of said front leg unit, a lower portion of said front

I claim: 1. A frame structure for a foldable chair comprising: an front interconnecting supporting unit having a front leg unit, a crisscrossed supporting unit installed thereon, wherein each of said front leg unit is composed of a upper portion of said front leg unit, a lower portion of said front leg unit, a front base cap, receiving joint and a front gliding sleeve; a rear interconnecting supporting unit being installed with a rear leg unit, an arc-shaped supporting unit, wherein each of said rear leg unit is installed with a rear base cap, a first rear gliding sleeve, a second rear gliding sleeve, a rod-bracket track, and a rear leg rod; wherein said front leg unit and said rear leg unit are parallel to each other and perpendicular to the ground where it is allowed to be folded and extended longitudinally; a lateral interconnecting supporting unit being composed of two board members pivotally connected with each other between said front leg unit and said rear leg unit; a transverse supporting rod having a connecting plate, a rod and a connecting joint installed thereon; a seat supporting unit and an armrest unit being installed between said front and rear leg unit respectively, wherein said seat supporting unit is provided for a seat unit to engage through; wherein said seat supporting unit is composed of a curved front portion and straight rear portion engaged with said second rear gliding sleeve positioned on said rear leg unit; wherein each of said receiving joint of said front leg unit is suitably engaged with the front portion of said seat supporting unit allowing said seat supporting unit being positioned between said front leg unit and said rear leg unit; beneath said armrest unit, a connecting member protruding there from and a gliding rod extending along the bottom of said armrest unit which can be pivotally engaged with said receiving joint of said front leg and sliding through said rod-bracket track respectively allowing said armrest unit being positioned on the top of said seat supporting unit. 2. A frame structure for a foldable chair as claimed in claim 1, wherein said rod-bracket track is in semi-cylinder shape and installed on the top of said rear gliding sleeve allowing to be rotated forward and backward. 3. A frame structure for a foldable chair as claimed in claim 1, wherein one end of said armrest unit arises along with said receiving joint of said front leg unit, and another end of said armrest unit simultaneously rotates upward against rod-bracket track during folding process. 4. A frame structure for a foldable chair as claimed in claim 1, wherein said front leg unit, armrest unit, rod-bracket track and a suitable length of said upper portion of said front leg unit and said rear leg unit are allowed to be eliminated so as to form a foldable chair without armrest unit.