Folding bed frame

Information

  • Patent Grant
  • 6553586
  • Patent Number
    6,553,586
  • Date Filed
    Wednesday, December 26, 2001
    23 years ago
  • Date Issued
    Tuesday, April 29, 2003
    21 years ago
  • Inventors
  • Examiners
    • Santos; Robert G.
Abstract
A folding bed frame has a pair of support tubes, two pairs of connection tubes, three pairs of leg sets, a plurality of positioning devices, a plurality of connection bars, a plurality of angle plates, and a plurality of T-shaped plates. Each leg set has a generally S-shaped rod, the generally S-shaped rod having a lower portion, a middle portion and an upper portion, a curved rod disposed on the middle portion of the generally S-shaped rod, a leg rod having an upper end disposed on a bottom of the middle portion of the generally S-shaped rod, and two of the connection bars connected to one of the curved rods, one of the generally S-shaped rods, and one of the leg rods. Two angle plates are connected to one curved rod and one connection tube. Two T-shaped plates are connected to one curved rod and two connection tubes. Each positioning device is disposed in the corresponding connection tube to position the corresponding connection tube and the corresponding support tube.
Description




BACKGROUND OF THE INVENTION




The present invention relates to a folding bed frame. More particularly, the present invention relates to a folding bed frame which has a positioning device to be operated easily.




A conventional folding bed frame has a pair of X-shaped leg sets. When a user sits on the conventional folding bed frame, the X-shaped leg sets will be extended to the utmost. The conventional folding bed frame has a plurality of connecting tubes having positioning devices to position the connecting tubes. However, the positioning devices cannot be contracted so that it is difficult to assemble the connecting tubes.




SUMMARY OF THE INVENTION




An object of the present invention is to provide a folding bed frame which has a generally S-shaped rod, a curved rod disposed on the generally S-shaped rod, and a leg rod disposed on a bottom of the generally S-shaped rod to form two generally U-shaped configurations so that a leg set will be extended stably.




Another object of the present invention is to provide a folding bed frame which has a positioning device to be operated easily so that a support tube and a connection tube are assembled easily.




Accordingly, a folding bed frame comprises a plurality of support tubes, a plurality of connection tubes, a plurality of leg sets, a plurality of positioning devices, a plurality of connection bars, a plurality of angle plates, and a plurality of T-shaped plates. Each of the leg sets has a generally S-shaped rod, the generally S-shaped rod having a lower portion, a middle portion and an upper portion, a curved rod disposed on the middle portion of the generally S-shaped rod, a leg rod having an upper end disposed on a bottom of the middle portion of the generally S-shaped rod, and two of the connection bars connected to one of the curved rods, one of the generally S-shaped rods, and one of the leg rods. Two of the angle plates are connected to one of the curved rods and one of the connection tubes. Two of the T-shaped plates are connected to one of the curved rods and two of the connection tubes. Each of the connection tubes has an end opening. Each of the positioning devices is disposed in the corresponding connection tube to position the corresponding connection tube and the corresponding support tube.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a perspective assembly view of a folding bed frame of a preferred embodiment in accordance with the present invention;





FIG. 2

is a perspective exploded view of a folding bed frame of a preferred embodiment in accordance with the present invention;





FIG. 2A

is a perspective exploded view of a positioning device and a connection tube;





FIG. 3

is an elevational schematic view illustrating a folding bed frame of a preferred embodiment is extended;





FIG. 4

is an elevational schematic view illustrating a leg set of a folding bed frame of a preferred embodiment is folded;





FIG. 5

is an elevational schematic view illustrating a folding bed frame of a preferred embodiment is folded;





FIG. 6

is a schematic view illustrating a folding bed frame of a preferred embodiment is folded into a compact configuration;





FIG. 7

is an elevational view of a folding bed frame of a preferred embodiment in accordance with the present invention; and





FIG. 7A

is a partially sectional view of a folding bed frame of a preferred embodiment in accordance with the present invention.











DETAILED DESCRIPTION OF THE INVENTION




Referring to

FIGS. 1

to


7


A, a folding bed frame


1


comprises a pair of support tubes


30


, two pairs of connection tubes


20


, three pairs of leg sets


10


, a plurality of positioning devices


23


, a plurality of connection bars


50


, a plurality of angle plates


60


, and a plurality of T-shaped plates


70


.




Each of the leg sets


10


has a generally S-shaped rod


11


, the generally S-shaped rod


11


having a lower portion


112


, a middle portion


113


and an upper portion


111


, a curved rod


12


disposed on the middle portion


113


of the generally S-shaped rod


1


, a leg rod


122


having an upper end


124


disposed on a bottom of the middle portion


113


of the generally S-shaped rod


11


, and two of the connection bars


50


connected to one of the curved rods


12


, one of the generally S-shaped rods


11


, and one of the leg rods


122


.




Two of the angle plates


60


are connected to one of the curved rods


12


and one of the connection tubes


20


.




Two of the T-shaped plates


70


are connected to one of the curved rods


12


and two of the connection tubes


20


.




Each of the connection tubes


20


has an oblong slot


21


and an end opening


22


.




Each of the positioning devices


23


is disposed in the corresponding connection tube


20


to position the corresponding connection tube


20


and the corresponding support tube


30


.




Each of the support tubes


30


has a pair of circular holes


31


, and each of the circular holes


31


receives the corresponding positioning device


23


.




Each of the positioning devices


23


has a square tube


24


inserted in the corresponding connection tube


20


, a round pipe


25


inserted in the square tube


24


, a pin


27


having a pair of threaded apertures


271


, a spring


26


enclosing the pin


27


, the spring


26


and the pin


27


inserted in the round pipe


25


, and a cover block


28


covering the end opening


22


of the corresponding connection tube


20


.




The cover block


28


has a through hole


281


.




The pin


27


is inserted through the through hole


281


of the cover block


28


.




A button


29


has a pair of through apertures


291


.




Two screws Q pass through the through apertures


291


of the button


29


, the oblong slot


21


of the connection tube


20


, and the threaded apertures


271


of the pin


27


.




The curved rod


12


has an upper part


121


and a lower part


123


.




A plurality of first rivets P fasten two of the connection bars


50


, one of the curved rods


12


, one of the generally S-shaped rod


11


, and one of the leg rod


122


together.




A plurality of second rivets P fasten two of the angle plates


60


, one of the curved rods


12


, and one of the connection tubes


20


together.




A plurality of third rivets P fasten two of the T-shaped plates


70


, one of the curved rods


12


, and two of the connection tubes


20


together.




A fabric


40


has a plurality of periphery holes


41


to receive the support rods


30


and the connection rods


20


.




The generally S-shaped rod


11


, the curved rod


12


, and the leg rod


122


will form two generally U-shaped configurations so that the leg set


10


will be extended stably.




When the button


29


is moved along the oblong slot


21


of the connection tube


20


, the pin


27


is moved also.




When the pin


27


is moved inward, the support rod


30


is detached from the connection rod


20


.




The invention is not limited to the above embodiment but various modification thereof may be made. Further, various changes in form and detail may be made without departing from the scope of the invention.



Claims
  • 1. A folding bed frame comprises:a plurality of support tubes, a plurality of connection tubes, a plurality of leg sets, a plurality of positioning devices, a plurality of connection bars, a plurality of angle plates, and a plurality of T-shaped plates, each of the leg sets having a generally S-shaped rod, the generally S-shaped rod having a lower portion, a middle portion and an upper portion, a curved rod disposed on the middle portion of the generally S-shaped rod, a leg rod having an upper end disposed on a bottom of the middle portion of the generally S-shaped rod, and two of the connection bars connected to one of the curved rods, one of the generally S-shaped rods, and one of the leg rods, two of the angle plates connected to one of the curved rods and one of the connection tubes, two of the T-shaped plates connected to one of the curved rods and two of the connection tubes, each of the connection tubes having an end opening, and each of the positioning devices disposed in the corresponding connection tube to position the corresponding connection tube and the corresponding support tube.
  • 2. The folding bed frame as claimed in claim 1, wherein each of the support tubes has a pair of circular holes, and each of the circular holes receives the corresponding positioning device.
  • 3. The folding bed frame as claimed in claim 1, wherein each of the connection tubes further has an oblong slot.
  • 4. The folding bed frame as claimed in claim 3, wherein each of the positioning devices has a square tube inserted in the corresponding connection tube, a round pipe inserted in the square tube, a pin having a pair of threaded apertures, a spring enclosing the pin, the spring and the pin inserted in the round pipe, and a cover block covering the end opening of the corresponding connection tube, the cover block has a through hole, the pin is inserted through the through hole of the cover block, a button has a pair of through apertures, and two screws pass through the through apertures of the button, the oblong slot of the connection tube, and the threaded apertures of the pin.
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