Chair Having Swing Motion Function and Swing Module for Use Therein

Abstract

The present invention provides a chair having a swing motion function and a swing module for use therein, the chair comprising: a leg module formed to be supported on the floor; a seat module disposed above the leg module and formed to support the body of a user; and a swing module configured to connect the leg module and the seat module and swing the seat module to both sides of the user with reference to the leg module as the user sitting on the seat module moves from side to side, wherein the swing module comprises: a lower fixed unit coupled to the leg module; an upper moving unit coupled to the seat module; and a link unit having a lower connection end rotatably connected to the lower fixed unit and an upper connection end rotatably connected to the upper moving unit so as to allow the upper moving unit to swing about the lower fixed unit.

What is claimed is: 
     
         1 . A chair having a swing motion function, comprising:
 a leg module configured to be supported on a floor;   a seat module disposed on the leg module and configured to support a user's body; and   a swing module configured to connect the leg module and the seat module and swing the seat module to both sides of the user with respect to the leg module according to side-to-side movement of the user sitting on the seat module,   wherein the swing module comprises:   a lower fixed unit coupled to the leg module;   an upper movable unit coupled to the seat module; and   a link unit having a lower connection end rotatably connected to the lower fixed unit and an upper connection end rotatably connected to the upper movable unit, the link unit allowing the upper movable unit to perform a swing operation about the lower fixed unit.   
     
     
         2 . The chair of  claim 1 , wherein the lower connection end is positioned closer to the seat module than the upper connection end, such that the upper movable unit is raised as the upper movable unit moves away from the leg module during the swing operation. 
     
     
         3 . The chair of  claim 1 , wherein the link unit comprises a pair of sub-links arranged parallel to each other, the link unit allowing the upper movable unit to remain in a horizontal position during the swing operation. 
     
     
         4 . The chair of  claim 1 , wherein the upper movable unit comprises:
 an upper base coupled with the seat module; and   a wing extending from the upper base so as to bend,   wherein the upper connection end is connected to the wing.   
     
     
         5 . The chair of  claim 4 , wherein the wing comprises a pair of sub-wings opposed to each other,
 wherein the link unit comprises:   a pair of first sub-links arranged to face one of the pair of sub-wings; and   a pair of second sub-links disposed to face the other one of the pair of sub-wings.   
     
     
         6 . The chair of  claim 5 , wherein the lower fixed unit comprises:
 a lower base coupled to the leg module; and   a pivot rod fixed to the lower base and rotatably connected to one of the pair of first sub-links and one of the pair of second sub-links.   
     
     
         7 . The chair of  claim 4 , wherein the link unit further comprises:
 a thrust bearing arranged for rotatable connection between the wing and the upper connection end.   
     
     
         8 . The chair of  claim 1 , wherein the swing module further comprises:
 a stop unit configured to stop the swing operation between the upper movable unit and the lower fixed unit.   
     
     
         9 . The chair of  claim 8 , wherein the stop unit comprises:
 an operation lever installed on the lower fixed unit and configured to be rotated;   an engagement piece provided to the operation lever and having an engagement portion; and   a catch piece provided to the upper movable unit and engaged with the engagement portion as the operating lever is rotated.   
     
     
         10 . The chair of  claim 1 , wherein the swing module further comprises:
 a restriction unit configured to limit a range of the swing operation between the upper movable unit and the lower fixed unit.   
     
     
         11 . The chair of  claim 10 , wherein the restriction unit comprises:
 a first catch piece provided to the lower fixed unit; and   a second catch piece provided to the upper movable unit so as to be positioned on a movement trajectory of the first catch piece according to the swing operation, the second catch piece being engaged with the first catch piece during the swing operation.   
     
     
         12 . The chair of  claim 1 , wherein the seat module comprises:
 a hip seat coupled to the upper movable unit to support hips of the user; and   an armrest disposed at a side of the hip seat and installed on the lower fixed unit.   
     
     
         13 . The chair of  claim 1 , wherein the seat module comprises:
 a back seat having a tension bar protruding downward and configured to support the user's back,   wherein the upper movable unit comprises:   a fixing bracket coupled to the tension bar to support tilting of the back seat.   
     
     
         14 . A swing module used in a chair having a swing motion function, the swing module comprising:
 a lower fixed unit configured to be coupled to a leg module of the chair;   an upper movable unit configured to be coupled to a seat module of the chair; and   a link unit having a lower connection end rotatably connected to the lower fixed unit and an upper connection end rotatably connected to the upper movable unit, the link unit allowing the upper movable unit to perform a swing operation about the lower fixed unit,   wherein the lower connection end is positioned farther from the leg module than the upper connection end, and   wherein the link unit comprises a pair of sub-links arranged parallel to each other, the link unit allowing the upper movable unit to remain in a horizontal position during the swing operation.   
     
     
         15 . The swing module of  claim 14 , wherein the upper movable unit comprises:
 an upper base coupled to the seat module; and   a pair of sub-wings extending from the upper base so as to bend, the sub-wings being opposed to each other,   wherein the link unit comprises:   a pair of first sub-links arranged to face one of the pair of sub-wings; and   a pair of second sub-links disposed to face another one of the pair of sub-wings,   wherein each of upper connection ends of the pair of first sub-links is connected to one of the pair of wings, and each of upper connection ends of the pair of second sub-links is connected to the other one of the pair of wings.