Abstract:
A size-adjustable detachable portable garbage bag rack for holding a garbage bag to collect garbage is constructed to include an adjustable top frame unit formed of four main frame bars and four auxiliary frame bars, an adjustable bottom frame unit formed of four main frame bars and four auxiliary frame bars, and a support frame unit formed of four detachable support frame bars selectively connected between the top frame unit and the bottom frame unit subject to the set size of the top frame unit and the bottom frame unit.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a garbage bag rack adapted to hold a garbage bag for collecting garbage and, more particularly, to a size-adjustable detachable portable garbage bag rack that can be adjusted to fit different garbage bags of different sizes. When not in use, the size-adjustable detachable portable garbage bag rack can be arranged in a detached manner and carried in a carton or carrying bag. 
     Regular dustbins or garbage bag racks are commonly made in a unitary piece. These dustbins or garbage bag racks occupy much storage space when not in use because they are not detachable. Further, regular dustbins or garbage bag racks fit a particular size of garbage bags only. Different sizes of garbage bags shall be used with different sizes of dustbins or garbage bag racks. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a garbage bag rack, which can be adjusted horizontally as well as vertically to fit different sizes of garbage bags. It is another object of the present invention to provide a garbage bag rack, which is detachable. It is still another object of the present invention to provide a garbage bag rack, which has hanger means for hanging a garbage bag for collecting garbage. It is still another object of the present invention to provide a garbage bag rack, which has clamp means for securing a garbage bag for collecting garbage. According to one aspect of the present invention, the size-adjustable detachable portable garbage bag rack comprises an adjustable top frame unit formed of four main frame bars and four auxiliary frame bars, an adjustable bottom frame unit formed of four main frame bars and four auxiliary frame bars, and a support frame unit formed of four detachable support frame bars selectively connected between the top frame unit and the bottom frame unit subject to the set size of the top frame unit and the bottom frame unit. According to another aspect of the present invention, the auxiliary frame bars of the top frame unit can be respectively axially moved in the main frame bars of top frame unit to adjust the size of the top frame unit and then set in the adjusted position, the auxiliary frame bars of the bottom frame unit can be respectively axially moved in the main frame bars of top frame unit to adjust the size of the bottom frame unit and then set in the adjusted position, and the support frame bars of the support frame unit can be selectively connected between bottom screw rods of the top frame unit and top screw rods of the bottom frame unit subject to the set size of the top frame unit and the bottom frame unit. According to another aspect of the present invention, the main frame bars of the top frame unit have hanging hooks for hanging a garbage bag. According to still another aspect of the present invention, C-shaped clamps are provided for securing a garbage bag to the support frame bars of the support frame unit. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an exploded view of a garbage bag rack according to the present invention. 
     FIGS. 2A,  2 B and  2 C are sectional views showing the actions of the connection between the main frame bar and the auxiliary frame bar according to the present invention. 
     FIG. 3 is an elevational view of the garbage bag rack according to the present invention. 
     FIG. 4A illustrates the auxiliary frame bar of the bottom frame unit inserted into the corresponding main frame bar according to the present invention. 
     FIG. 4B is similar to FIG. 4A but showing the stop block of the auxiliary frame bar stopped at the inner close end of the sliding slot of the main frame bar. 
     FIG. 5A shows the garbage bag rack set in one operative status. 
     FIG. 5B shows the garbage bag rack set in another operative status. 
     FIG. 6 is an elevational view of a C-shaped garbage bag clamp according to the present invention. 
     FIG. 7A shows the garbage bag rack detached and packed in a carton according to the present invention. 
     FIG. 7B shows the garbage bag rack detached and packed in a carrying bag according to the present invention. 
     FIG. 8A illustrates the relationship between the coupling rod of one auxiliary frame bar of the top frame unit and the T-shaped coupling groove of one main frame bar of the top frame unit according to the present invention. 
     FIG. 8B is similar to FIG. 8A but showing the coupling rod of the auxiliary frame bar engaged into the T-shaped coupling groove of the main frame bar. 
     FIG. 9A shows an application example of the present invention. 
     FIG. 9B shows another application example of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to FIG. 1 m  a garbage bag rack in accordance with the present invention is comprised of a top frame unit  10 , a bottom frame unit  30 , and a support frame unit  20  connected between the top frame unit  10  and the bottom frame unit  30 . 
     The top frame unit  10  is comprised of four main frame bars  11  and four auxiliary frame bars  12 . The mainframe bars  11  each comprise a plug hole  110  axially disposed at one end thereof, a sliding slot  111  in one sidewall of the plug hole  110 , a T-shaped coupling hole  112  disposed in one side of the other end thereof, two bottom screw rods  113  respectively perpendicularly extended from the bottom sidewall thereof near the two distal ends, a plurality of hanging hooks  114  provided at one peripheral sidewall, and a plurality, for example, four longitudinally spaced locating holes  115 . The auxiliary frame bars  12  each comprise a coupling rod  120  of T-shaped profile axially extended from one end thereof and adapted to engage the plug hole  112  of one main frame bar  11 , a stop block  121  disposed at one end adjacent to the coupling rod  120  for sliding in the sliding slot  111  of one main frame bar  11 , and a springy strip  122  cut from a part of one sidewall thereof remote from the coupling rod  120 . The spring strip  122  has a fixed end formed integral with the respective auxiliary frame bars  12 , and a free end terminating in a raised retaining portion  123  for positioning in one of the locating holes  115  of one main frame bar  11 . 
     The support frame unit  20  is comprised of four support frame bars, each support frame bar comprised of a first frame tube  21 , a second frame tube  22 , and a third frame tube  23 . The first frame tube  21  has a screw hole  210  in one end thereof for threading onto one bottom screw rod  113  of one main frame bar  11  of the top frame unit  10 , and a plug hole  211  in the other end thereof for the mounting of the second frame tube  22 . The second frame tube  22  has a split coupling rod  220  axially extended from one end thereof for press-fitting into the plug hole  211  of the first frame tube  21 , and a plug hole  222  in the other end thereof. The split coupling rod  220  has a longitudinal split  221 . The third frame tube  23  has a split coupling rod  230  axially extended from one end thereof for press-fitting into the plug hole  222  of the second frame tube  22 , and a screw hole  232  in the other end thereof. The split coupling rod  230  has a longitudinal split  231 . 
     The bottom frame unit  30  is comprised of four main frame bars  31  and four auxiliary frame bars  32 . The main frame bars  31  each comprise a plug hole  310  axially disposed at one end thereof, a sliding slot  311  in one sidewall of the plug hole  310 , a T-shaped coupling hole  312  disposed in one side of the other end thereof, three top screw rods  313  respectively perpendicularly extended from the top sidewall thereof, and four locating holes  314  longitudinally spaced at the back sidewall thereof. The auxiliary frame bars  32  each comprise a coupling rod  320  axially extended from one end thereof and adapted to engage the plug hole  312  of one main frame bar  31 , a stop block  321  disposed at one end adjacent to the coupling rod  320  for sliding in the sliding slot  311  of one main frame bar  31 , and a springy strip  322  cut from a part of one sidewall thereof remote from the coupling rod 320 . The spring strip  322  has a fixed end formed integral with the respective auxiliary frame bars  32 , and a free end terminating in a raised retaining portion  323  for positioning in one of the locating holes  314  of one main frame bar  31 . 
     The connection between the respective screw rods  113 ; 313  and the respective screw holes  210 ; 232 , the connection between the respective coupling rods  120 ; 320  and the respective T-shaped coupling holes  112 ; 312 , the connection between the respective raised retaining portions  123 ; 323  of the respective sp 5 ringy strips  122 ; 322  and the respective locating holes  114 ; 314 , and the coupling between the respective stop blocks  121 ; 321  and the respective sliding slots  111 ; 311  set up the garbage bag rack. 
     The connection between the main frame bar  11  and the corresponding auxiliary frame bar  12  of the top frame unit  10  is outlined hereinafter with reference to FIGS. 2A,  2 B, and  2 C. Before the insertion of the auxiliary frame bar  12  into the plug hole  110  of the main frame bar  11 , the springy strip  122  is suspended in the respective sidewall of the auxiliary frame bar  12 . When inserting the auxiliary frame bar  12  into the plug hole  110  of the main frame bar  11 , as shown in FIG. 2B, the springy strip  122  is forced inwards by the inside wall of the main frame bar  11 . After the auxiliary frame bar  12  has been inserted into the plug hole  110  of the main frame bar  11  and set into position, as shown in FIG. 2C, the raised retaining portion  123  of the springy strip  122  is forced into engagement with one locating hole  115  of the main frame bar  11 . The combined length of the main frame bar  11  and the auxiliary frame bar  12  can be adjusted by shifting the engagement position of the raised retaining portion  123  of the springy strip  122  from one locating hole  115  of the main frame bar  11  to another. FIG. 3 shows the top frame unit  10  set in the maximum dimensions. Further, the connection between the main frame bar  31  and the corresponding auxiliary frame bar  32  of the bottom frame unit  30  is similar to the top frame unit  10 . 
     Referring to FIGS. 4A and 4B, when receiving the auxiliary frame bar  32  in the main frame bar  31 , the stop block  321  of the auxiliary frame bar  32  is forced into the sliding slot  311  of the main frame bar  31  and then stopped at the inner close end of the sliding slot  311 . Through the stop block  321 , the auxiliary frame bar  32  can easily be pulled out of the main frame bar  31 . 
     Referring to FIGS. 5A and 5B and FIG. 1 again, the support frame unit  20  can be selectively fastened to the bottom screw rods  113  of the main frame bars  11  of the top frame unit  10  and the top screw rods  313  of the main frame bars  31  of the bottom frame unit  30  subject to the size of the garbage bag rack to be set. 
     Referring to FIGS. 8A and 8B and FIG. 1 again, the coupling rod  120  of the auxiliary frame bar  12  is forced into engagement with the T-shaped coupling hole  112  of the main frame bar  11 . This engagement enables the top frame unit  10  to bear a heavy load. 
     Referring to FIG.  6  and FIGS. 1 and 5A again, C-shaped garbage bag clamps  40  are respectively fastened to the support frame unit  20  and adapted to hold a garbage bag in the garbage bag rack. The C-shaped garbage bag clamps  40  each have a grained inner engagement wall  41  adapted to secure a garbage bag to the first frame tube  21  of each support frame bar of the support frame unit  20 . 
     Referring to FIG.  9 A and FIG. 1 again, the open side of the garbage bag can be hung on the hanging hooks  114  of the main frame bars  11  of the top frame unit  10 . 
     Referring to FIGS. 7A and 7B, when detached, the detached parts of the garbage bag rack can be packed in a carton  50  as shown in FIG. 7A, or a carrying bag  60  as shown in FIG.  7 B. 
     A prototype of garbage bag rack has been constructed with the features of FIGS.  1 ˜ 9 . The garbage bag rack functions smoothly to provide all of the features discussed earlier. 
     Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.