Integrally formed base arrangement of an office chair

• US 20100187882A1
• Filed: 01/23/2009
• Published: 07/29/2010
• Est. Priority Date: 01/23/2009
• Status: Active Grant

• Current Assignee: Yung-Hua Chen
• Original Assignee: Yung-Hua Chen
• Inventors: Chen, Yung-Hua
• Granted Patent: US 7,887,138 B2
• Time in Patent Office: Days
• US Class Current: 297/285
• CPC Class Codes: A47C 3/00 Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats A47C1/00, A47C4/00 take precedence
• CPC Class Codes: A47C 4/02 Dismountable chairs
• CPC Class Codes: A47C 4/028 Upholstered chairs, e.g. metal, plastic or wooden chairs

Abstract

An integrally formed base arrangement of an office chair, and more particularly, a base arrangement integrally made by plastic material, comprising: a) a middle axle seat; b) a first U-shaped pivotal seat perpendicular to the middle axle seat; c) a claw member having a plurality of arched supporting arms extending in the shape of claws from the external rim of the middle axle seat upward; d) a base frame disposed at the top of the supporting arms of the claw member, an annular groove being positioned at the surface of the base frame; e) two second U-shaped pivotal seats symmetrically formed at both sides of the bottom of the base frame; and f) two hand rest supports extended from both sides of the base frame and the claw member outward, thereby creating a connection surface directed upward at the external end thereof. In this way, a convenient and rapid assembly of components of the office chair is ensured. Moreover, a stable structure is achieved.

Claims

1. An integrally formed base arrangement of an office chair, and more particularly, a base arrangement integrally made by plastic material, comprising:

a) a middle axle seat having a conic axle hole in longitudinal direction;

b) a first U-shaped pivotal seat perpendicular to the middle axle seat, the first U-shaped pivotal seat having an opening directed aback, the first U-shaped pivotal seat being provided with longitudinal grooves at both internal walls thereof, a locating portion being formed at the bottom of the longitudinal grooves;

c) a claw member having a plurality of arched supporting arms extending in the shape of claws from the external rim of the middle axle seat upward;

d) a base frame disposed at the top of the supporting arms of the claw member, an annular groove being positioned at the surface of the base frame;

e) two second U-shaped pivotal seats symmetrically formed at both sides of the bottom of the base frame with openings directed aback and positioned parallel to the first U-shaped pivotal seat, the second U-shaped pivotal seat having a through hole extended laterally at both sides thereof; and

f) two hand rest supports extended from both sides of the base frame and the claw member outward, thereby creating a connection surface directed upward at the external end thereof.

2. The integrally formed base arrangement of an office chair as recited in claim 1 wherein the axle hole of the middle axle seat is provided for the insertion of a foot seat middle tube of an office chair from bottom to top in place.

3. The integrally formed base arrangement of an office chair as recited in claim 1 wherein the first U-shaped pivotal seat is provided for the connection of the bottom of an elasticity adjuster of the office chair, and wherein a lateral projection at the bottom of the elasticity adjuster is supported by the locating portion at the bottom of the longitudinal grooves in a pivotal manner.

4. The integrally formed base arrangement of an office chair as recited in claim 1 wherein a seat pad of the office chair is mounted on the surface of the base frame by means that a flange at the bottom of the seat pad fits into the annular groove.

5. The integrally formed base arrangement of an office chair as recited in claim 1 wherein the second U-shaped pivotal seat is provided for the connection of a connection rod at the bottom of a seat back of the office chair, and wherein a locking element fits into the through hole in such a manner that the end portion of the connection rod is brought into a position of pivotal connection.

6. The integrally formed base arrangement of an office chair as recited in claim 1 wherein the connection surface of the hand rest support is provided with positioning holes for the attachment of hand rests to the connection surface.