Foldable bed frame with limit mechanism

Abstract

A foldable bed frame structure with a limit mechanism includes a bed frame, legs connected to a bottom of the bed frame, and support poles connected between the bed frame and the legs. The limit mechanism comprises a locking member connected to one of the legs and a limit member adapted to limit movement of a bed sheet. The limit member is connected to the locking member. The limit mechanism is used to limit movement of the bed sheet. The mattress won't be moved easily by using the opening of the bed sheet to be confined to the limit member.

I claim: 
     
         1 . A foldable bed frame with a limit mechanism, comprising a bed frame, legs connected to a bottom of the bed frame, and support poles connected between the bed frame and the legs, characterized by: the limit mechanism comprising a locking member connected to one of the legs and a limit member adapted to limit movement of a bed sheet, the limit member being connected to the locking member. 
     
     
         2 . The foldable bed frame with a limit mechanism as claimed in  claim 1 , wherein the locking member comprises a first holding plate, a second holding plate, and a connecting plate connected between the first holding plate and the second holding plate, the locking member further comprising an adjustment bolt to adjust the distance between the first holding plate and the second holding plate, the adjustment bolt penetrating through the first holding plate and the second holding plate, the first holding plate, the connecting plate, the second holding plate, and the adjustment bolt jointly forming an accommodation space to accommodate a respective one of the legs. 
     
     
         3 . The foldable bed frame with a limit mechanism as claimed in  claim 2 , wherein the accommodation space is provided with ribs to limit movement of the locking member relative to the corresponding leg, the ribs comprising a first rib formed on the first holding plate and a second rib formed on the second holding plate. 
     
     
         4 . The foldable bed frame with a limit mechanism as claimed in  claim 1 , wherein the limit member is a curved pipe, the curved pipe having a first straight pipe portion, a second straight pipe portion, and a curved pipe portion connected between the first straight pipe portion and the second straight pipe portion, one end of the first straight pipe portion being fixed to the locking member through a connecting pipe, another end of the first straight pipe portion being connected with one end of the curved pipe portion, one end of the second straight pipe portion being connected with another end of the curved pipe portion, another end of the second straight pipe portion being a free end. 
     
     
         5 . The foldable bed frame with a limit mechanism as claimed in  claim 4 , further comprising a medium member fixed on the second straight pipe portion, the medium member being formed with an installation hole for locking a backrest. 
     
     
         6 . The foldable bed frame with a limit mechanism as claimed in  claim 1 , wherein the legs comprise a middle leg and four outer legs disposed at corners of the bed frame, the limit mechanism further comprising a guide member disposed on the middle leg, the guide member comprising a fixing member connected to the middle leg and a support pipe connected to the fixing member, the support pipe being disposed in an upright direction. 
     
     
         7 . The foldable bed frame with a limit mechanism as claimed in  claim 1 , wherein the legs each is provided with a reinforcement transverse pole, the reinforcement transverse pole being provided with a fixing plate, the fixing plate being formed with a notch, one end of the support pole is hinged to the bottom of the bed frame, another end of the support pole being connected to the notch through a bolt assembly.