초록 ▼

Disclosed is a folding chair comprising a frame and a seat sheet, which has means for protecting a user's vertebral column and means for expanding the seat to improve its seating comfort and stability. The expanding means are connected to both sides of the seat, and the protecting means is coupled a

Disclosed is a folding chair comprising a frame and a seat sheet, which has means for protecting a user's vertebral column and means for expanding the seat to improve its seating comfort and stability. The expanding means are connected to both sides of the seat, and the protecting means is coupled at its opposite ends to armrests, upper portions of frame elements or the expanding means. The expanding means are hanged on projections formed by bending upper portions of the front frame elements. The protecting means is held at a certain height on a back rest of the chair but being allowed to be laterally moved by holding means, thereby enabling length of the protecting means to be adjusted. The folding chair may have one or more means for protecting a user's vertebral column.

대표청구항 ▼

1. A folding chair including a frame constructed by a plurality of frame elements including front frame elements, and a seat unit held on the frame by means of holding means and having a seat portion and a back rest portion which are integrally formed, comprising:means connected to both sides of the

1. A folding chair including a frame constructed by a plurality of frame elements including front frame elements, and a seat unit held on the frame by means of holding means and having a seat portion and a back rest portion which are integrally formed, comprising:means connected to both sides of the seat portion for outwardly expanding the seat portion; a pair of arm rests held on upper portions of the front frame elements, with an arm rest on each of two opposite sides of said chair; and means coupled at its opposite ends to the arm rests for protecting a user's vertebral column by supporting the back rest portion. 2. A folding chair including a frame constructed by a plurality of frame elements, and a seat unit held on the frame by means of holding means and having a seat portion and a back rest portion which are integrally formed, comprising:means connected to both sides of the seat portion for outwardly expanding the seat portion; a pair of arm rests held on upper portions of front frame elements, with an arm rest on each of two opposite sides of said chair; and means coupled at its opposite ends to the arm rests for protecting a user's vertebral column by supporting the back rest portion; wherein the expanding means is made by stitching portions extended from both sides of the seat portion to form pockets of predetermined width each having a hole, and support hangers, which are formed by rearwardly bending upper ends of the front frame elements, are inserted in the holes of the pockets, whereby the seat portion can be expanded by extending motions of support hangers of the frame elements. 3. The folding chair as set forth in claim 2, wherein the upper ends of the frame elements are provided at their upper surfaces or lower surfaces with additional arm rest hangers for supporting arm rests.4. The folding chair as set forth in claim 2, wherein the frame elements are rearwardly bent at their upper portion to form the support hangers and then outwardly bent at their upper ends to form the arm rest hangers.5. The folding chair as set forth in claim 2 or 3, wherein the seat portion is provided at its front sides with extending straps each having a hole, and the front frame elements are provided with slide pads having holes into which the front frame elements are inserted and which have connecting pins adapted to be coupled to the extending straps.6. The folding chair as set forth in claim 2 or 3, wherein the vertebral column-protecting means is coupled to the expanding pockets or the upper bent ends of the front frame elements.7. The folding chair as set forth in claim 2, wherein the vertebral column-protecting means is coupled at its opposite ends to upper ends of the front frame elements by which the arm rests are supported.8. The folding chair as set forth in claim 2 or 7, wherein the vertebral column-protecting means comprises a band body having a predetermined length and a predetermined width.9. The folding chair as set forth in claim 8, wherein the band body is provided at its middle portion with an additional enlarged supporting member fixed thereto, and the enlarged supporting member is increased in its width toward its middle portion to form an approximately elliptical shape.10. The folding chair as set forth in claim 8, wherein the band body is provided at its middle portion with an additional enlarged rectangular supporting member adapted to slide therealong, and the rectangular supporting member is formed with slits through which the band body passes, so that the rectangular supporting member is moved along the band body from side to side by a user.11. The folding chair as set forth in claim 8, wherein the band body constituting the vertebral column-protecting means is disposed to be in contact with a rear surface of the back rest, and the rear surface of the back rest is vertically provided at its both sides with a pair of holding bands, each of the holding bands being stitched at its upper and lower ends to form a passage therebetween, so that the holding bands slidably confined in the holding bands are disposed at a user's vertebral column and stably support the user's vertebral column when the user sits down on the seat portion.12. The folding chair as set forth in claim 8, wherein the back rest portion is provided at a lower portion of its rear surface with one of a hook or loop fastener fixedly attached thereto, and the band body is provided with a correspondingly mating loop or hook fastener, so that the band body is detachably attached to the back rest portion.13. The folding chair as set forth in claim 8, wherein the band body is provided at its opposite ends with eyelets which are inserted over the front frame elements during assembly of the folding chair.14. The folding chair as set forth in claim 8, wherein the band body is provided at its opposite ends with ring-shaped straps which are made by stitching ends of the band and which are inserted over the front frame elements during assembly of the folding chair.15. The folding chair as set forth in claim 8, wherein the vertebral column-protecting means is provided at its opposite ends with hooks and the arm rest is provided with a plurality of eyelets so that the vertebral column-protecting means is adjusted in its length depending on body type of a user by connecting the hooks of the vertebral column-protecting means to desired eyelets of the eyelets.16. The folding chair as set forth in claim 15, wherein the arm rest is longitudinally provided at its lower surface with a plurality of rings attached thereto, and the hooks of the vertebral column-protecting means are coupled to the rings.17. The folding chair as set forth in claim 8, wherein the folding chair is adapted to accommodate two or three persons, and thus the corresponding number of vertebral column-protecting means are prepared therein and coupled at their opposite ends to upper ends of the front frame elements, wherein the vertebral column-protecting means pass through slots formed at the back rest portion such that the vertebral column-protecting means are disposed at a lower portion of the back rest portion.18. The folding chair as set forth in claim 2, wherein the vertebral column-protecting means is coupled at its opposite ends to the arm rest by stitching.19. The folding chair as set forth in claim 2 or 7, wherein the vertebral column-protecting means is provided with means for adjusting length of the vertebral column-protecting means to allow the vertebral column-protecting means to be easily shortened or lengthened depending on body type of a user.20. The folding chair as set forth in claim 2, wherein a plurality of tension springs are coupled to a corner portion of the seat unit corresponding to a boundary between the seat portion and the back rest portion so as to support body weight of a user when the user sits down on the seat unit.