Chair folding structure

• US 20030025361A1
• Filed: 07/31/2001
• Published: 02/06/2003
• Est. Priority Date: 07/31/2001
• Status: Abandoned Application

• Current Assignee: Lausan Chung-Hsin Liu
• Original Assignee: Lausan Chung-Hsin Liu
• Inventors: Liu, Lausan Chung-Hsin
• Application Number:
  US09/917,838
• Publication Number:
  US 20030025361A1
• Time in Patent Office: Days
• US Class Current: 297/16.2
• CPC Class Codes: A47C 4/286 foldable side to side and front to back, e.g. umbrella type
• CPC Class Codes: A47C 4/44 with legs pivotably connected to seat or underframe

Abstract

A chair folding structure comprises two handles being divided into two pivotal sections for being assembled with two front and rear chair legs; each of the rear chair leg being firmly secured to a first and a second axial connecting portion; a first shaft being axially connected to the axial covers connected with two connecting rods and sliding covers movable along the rear leg; a third axial connecting portion is installed on the sliding covers adjacent to the axial connecting covers; a back frame being assembled between the two handles; the back frame having two lateral rods assembled to the third axial connecting portion and a first joint rod set connected to the lateral rods. A force is applied to the first joint rod set to drive the two lateral rods to push the third axial connecting portion. Thereby, the sliding cover moves along the rear leg. Meanwhile, by the front leg, the driven rod is rotatable to drive the front chair leg by pivotally connecting the second axial means to move toward the rear leg. The front and rear legs are drawn close to each other by the pivotal sections in the handle. Therefore, the object of folding the chair at the four sides is achieved.

Claims

1. A chair folding structure comprising:

two handles being divided into two pivotal sections for being assembled with two front and rear chair legs;

each of the rear chair leg being firmly secured to a first and a second axial connecting portion;

a first shaft being axially connected to the axial covers connected with two connecting rods and sliding covers movable along the rear leg;

a third axial connecting portion is installed on the sliding covers adjacent to the axial connecting covers;

a back frame being assembled between the two handles;

the back frame having two lateral rods to the third axial connecting portion and a first joint rod set connected to the lateral rods;

wherein a force is applied to the first joint rod set to drive the two lateral rods to push the third axial connecting portion, thereby, the sliding cover moves along the rear leg;

meanwhile;

by the front leg, the driven rod rotates to drive the front chair leg by pivotally connecting the second axial means to move toward the rear leg;

the front and rear legs are drawn close to each other by the pivotal sections in the handle, therefore, the object of folding the chair at the four sides is achieved.

2. The chair folding structure as claimed in claim 1, wherein the first joint rod set includes at least two first movable rods pivotally connected to the lateral rods and a first connecting rods pivotally connected to the first movable rods.

3. The chair folding structure as claimed in claim 1, wherein a joint rod set is installed between the two front legs;

the rod set includes at least two second movable rods pivotally connected to the front legs and a second connecting rods pivotally connected to the second movable rods;

two ends of the second movable rod have second wings disposed across the second movable rods.

4. The chair folding structure as claimed in claim 2, wherein the first connecting rod is installed with a holding cover for being held by hands.

5. The chair folding structure as claimed in claim 3, wherein the second connecting rod is installed with a holding cover for being held by hands.

6. The chair folding structure as claimed in claim 1, wherein a fourth axial connecting cover is installed on the sliding covers;

the fourth axial connecting portion is assembled with an auxiliary driven rod axially connected through a second axial device.

7. The chair folding structure as claimed in claim 1, wherein any of the lateral rods of the frame is installed with a safety buckle which is separated from the stud buckle installed on the rear leg with respect to the safety buckle.