Structure of dust bin

A dust bin of the type comprising a container having a top opening covered with a removable cover, wherein said container has a flat, hollow chamber separately vertically disposed at the inside for receiving said cover when said cover is not in use, and two bolts at two opposite locations for releasably mounting said cover through hooked-joint permitting said cover to be rotated on said two bolts to close or open said top opening. A chemical case which has aromatic compounds or deodorant contained therein is attached to the container to fit flush with the bottom edge of the bottom projection which projecting from the bottom of the container.

BACKGROUND OF THE INVENTION: 
The present invention relates to dust bins and relates more particularly to 
a dust bin which has a separated chamber therein for receiving the cover 
thereof when the cover is not in use. 
A dust bin generally has a cover, either of fixed or removable type, to 
cover the top opening thereof, so as to prohibit insects from entering the 
dust bin and simultaneously mask the offensive-smelling of the dust and 
rubbish contained therein. One disadvantage of conventional dust bins is 
that a cover may be unable to tightly close the top opening of a dust bin. 
Another disadvantage of the conventional dust bins is that a cover may be 
carelessly disposed of, just like a dust itself, when it is not in use, 
causing pollution problem. 
SUMMARY OF THE INVENTION 
The present invention has been accomplished to eliminate the aforesaid 
problems. It is therefore an object of the present invention to provide a 
structure of dust bin which has a separate chamber therein for receiving 
the cover, which is used to cover the top opening of the dust bin, without 
occupying extra floor space. 
It is another object of the present invention to provide a structure of 
dust bin which has rubber packing covered on the top edge thereof so that 
the top opening thereof can be tightly closed by a cover. 
It is still another object of the present invention to provide a structure 
of dust bin which has a movable cover attached thereto to cover the top 
opening thereof, which movable cover has a retaining projecting at the 
front end thereof to engage with the rubber packing on the top edge of the 
dust bin so as to firmly secure the movable cover in position when the 
movable cover is covered on the dust bin. 
It is still another object of the present invention to provide a structure 
of dust bin which has a movable cover for covering the top opening 
thereof, which movable cover can be conveniently drawn out from a chamber 
therein to tightly close the top opening thereof or pushed back to become 
concealed inside said chamber. 
It is a yet further object of the present invention to provide a structure 
of dust bin which has holder means on the bottom of the cover thereof as 
well as at the inside for holding camphor balls or other deodorants to 
remove and mask the bad odor of the dust and rubbish contained in the dust 
bin.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring to FIGS. 1 and 2, a dust bin in accordance with the present 
invention is generally comprised of a body 1 for collecting dust, rubbish, 
etc., and a cover 11 covering over said body 1 at the top. A flat, hollow 
chamber 10 is vertically defined inside the body 1 at the back for 
receiving the cover 11 when the cover 11 is not in use. A rubber packing 
14 is mounted on the top edge of the body 1 so that the body 1 can be 
completely enclosed by the cover 11. The cover 11 has a retaining 
projection 110 at the front end thereof which is engaged in the top front 
edge of the body 1 to secure the cover 11 in place when the cover 11 is 
covered on the body 1 at the top, a hooked portion 111 at the rear end 
thererof which is pivotably hooked on two bolts 12 which are bilaterally 
fastened on the body 1 into the chamber 10, and a holder plate 13 at the 
center of the bottom surface thereof for holding a camphor box which 
contains camphor balls to repel insects, prevent and destroy undesired 
odors. Inside the body 1, there is also provided a holder plate 112 for 
holding a camphor box 113. The body 1 further comprises a projecting 
bottom edge 16 at the bottom. A substantially loop-shaped chemical case 15 
is attached the body 1 at the bottom to fit flush with the projecting 
bottom edge 16. The chemical case 15 defines therein a plurality of 
compartments for holding aromatic compounds. 
Referring to FIGS. 3, 4 and 5, by pulling the retaining projection 110, the 
cover 11 is drawn out of the chamber 10 causing the hooked portion 111 
thereof to be hooked on the two bolts 12. As soon as the hooked portion 
111 hooks on the two bolts 12, the cover 11 is rotated downwards on the 
two bolts 12 to cover on the body 1 at the top. By engaging the retaining 
projection 110 (which is made of resilient material) with the body 1, the 
cover 11 is firmly retained in a horizontal position tightly covering over 
the rubber packing 14. When not in use, the cover 1 is lifted from a 
horizontal position to a vertical position and then, moved back into the 
chamber 10 (as shown in FIGS. 6 and 7). 
Referring to FIG. 8, when the cover 1 covers on the body 1 at the top, the 
camphor balls in the camphor box 113 which is set in the holder plate 13 
on the bottom surface of the cover 11 as well as the camphor balls in the 
camphor box 113 in the holder plate 112 inside the body 1 simultaneously 
produce a strong, characteristic odor to repel insects. At the same time, 
the aromatic compounds in the chemical case 15 produce aromatic smell to 
please one's nostrils. As shown in FIG. 9, the substantially loop-shaped 
chemical case 15 has a higher top edge around the inner diameter thereof 
and a relatively lower top edge around the outer diameter thereof. 
Therefore, when the chemical case 15 is attached to the body 1 at the 
bottom, a gap is maintained between the bottom surface of the body 1 and 
the top edge of the chemical case 15 around the outer diameter thereof, 
through which gap the aromatic smell from the aromatic compounds in the 
chemical case 15 is diffused. Further, the cheimcal case 15 has a small 
drain hole 150 at the bottom for drawing off water. 
Referring to FIG. 10, there is illustrated an alternate form of chemical 
case 15 according to the present invention which can be conveniently 
fastened in the hand-hold of any of a variety of dust bins. 
As indicated, the present invention is to provide such a structure of dust 
bin which has means for holding camphor balls or aromatic compounds to 
repel insects and destroy undesired odors. Further, when the cover is not 
in use, it can be conveniently received inside the body of the dust bin 
without causing any pollution problem.