Abstrict A Half-disposable syringe barrel including a barrel syringe and
a cap member as two stages. A plunger is fitted in the syringe barrel.
An emulsion ring is disposed in the cap member. The emulsion ring
is formed with a membrane and is made of highly flexible material.
A lubricant is overlaid on the emulsion ring and the membrane thereof.
The cap member is fitted with the front end of the syringe barrel.
When pulling the plunger backward to suck a medicine, the highly
flexible membrane of the emulsion ring is extended and sucked to
attach to the wall of the syringe barrel. Therefore, the medicine
is enclosed by the emulsion ring and the membrane and isolated from
the wall of the syringe barrel. Therefore, the syringe barrel and
the plunger are not contaminated by the medicine and the flowing
back blood. After the cap member is removed, the syringe barrel
can be recovered for reuse.
Claims What is claimed is:
1. A half-disposable syringe barrel comprising: a syringe barrel
which is a hollow tubular body in which a plunger is fitted; a cap
member in which an emulsion ring, a ventilation ring and an O-ring
are disposed, the emulsion ring being formed with a membrane, the
cap member being detachably fitted with front end of the syringe
barrel, whereby when sucking a medicine, the emulsion ring and the
membrane thereof form a protective film covering the wall of the
syringe barrel to isolate the medicine and the wall of the syringe
barrel, after used, the cap member being detached from the syringe
barrel and discarded, while the syringe barrel and the plunger being
recovered; and wherein the peripheral wall of the ventilation ring
is formed with multiple vents through which the air in the syringe
barrel escapes.
2. The half-disposable syringe barrel as claimed in claim 1 wherein
the syringe barrel and the cap member have cooperative conic profiles
for filing with each other by means of the coning.
3. The half-disposable syringe barrel as claimed in claim 1 wherein
the syringe barrel and the cap member are formed with corresponding
annular rib and annular groove for engaging with each other.
4. The half-disposable syringe barrel as claimed in 1 wherein
the rear ends of the syringe barrel and the plunger are formed with
corresponding notch and protuberance, whereby the protuberance is
aligned with the notch, the syringe barrel can be separated from
the cap member.
5. The half-disposable syringe barrel as claimed in claim 1 wherein
the emulsion ring and the membrane thereof are made of highly flexible
material.
6. The half-disposable syringe barrel as claimed in claim 1 wherein
a lubricant is overlaid on the emulsion ring and the membrane thereof.
7. The half-disposable syringe barrel as claimed in claim 1 wherein
the opening of the cap member is sealed by a sealing layer.
Description BACKGROUND OF THE INVENTION
The present invention relates to a half-disposable syringe barrel
which is able to isolate the syringe barrel from the medicine and
the flowing back blood and prevent the syringe barrel from being
contaminated thereby. The syringe barrel is applicable to the injection
syringes used in various hospitals and clinics.
In the existent hospitals or clinics, injections are taken quite
frequently during therapy. Some of the syringe barrels are discarded
after used. However, some syringe barrels are made of glass. After
injection, the needle is extracted and the glass syringe barrel
is sterilized for re-use. Although the amount of medical waste can
be reduced by such procedure, the sterilization may be incomplete
to lead to infection.
In order to ensure that the patient is protected from being injected
with the infected glass syringe barrel, the plastic-made syringe
barrel is used instead of the glass-made one. The plastic syringe
barrel is discarded after used without repeated use. This ensures
the safety of the patient. However, a great amount of medical wastes
are produced due to the disposable syringe barrel. It is troublesome
to treat these medical wastes and resource is wasted. In fact, the
needle of the syringe, which is surely contaminated, should be detached
from the syringe barrel and discarded without further use, while
the syringe barrel which is not contaminated can be recovered and
the material can be used for reproduction to save resource.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide
a half-disposable syringe barrel which is able to isolate the syringe
barrel from the medicine and the flowing back blood and prevent
the syringe barrel from being contaminated thereby.
It is a further object of the present invention to provide the
above half-disposable syringe barrel which permits effective recovery
of medical resource and reduces the amount of medical waste.
According to the above objects, the half-disposable syringe barrel
of the present invention includes a barrel syringe and a cap member
as two stages. A plunger is fitted in the syringe barrel. An emulsion
ring is disposed in the cap member. The emulsion ring is formed
with a membrane and is made of highly flexible material. A lubricant
is overlaid on the emulsion ring and the membrane thereof. The cap
member is fitted with the front end of the syringe barrel. When
pulling the plunger backward to suck a medicine, the highly flexible
membrane of the emulsion ring is extended and sucked to attach to
the wall of the syringe barrel. Therefore, the medicine is enclosed
by the emulsion ring and the membrane and isolated from the wall
of the syringe barrel. Therefore, the syringe barrel and the plunger
are not contaminated by the medicine and the flowing back blood.
After the cap member is removed, the syringe barrel can be recovered
for reuse.
The present invention can be best understood through the following
description and accompanying drawings wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective assembled view of the present invention;
FIG. 2 is a perspective exploded view of the present invention;
FIG. 3 is a sectional view of the present invention;
FIG. 4 is a sectional view showing the use of the present invention;
and
FIG. 5 is a sectional view showing that the cap member is separated
from the syringe barrel.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Please refer to FIG. 1. The half-disposable syringe barrel of the
present invention is composed of a syringe barrel 10 and a cap member
20.
Referring to FIG. 2 the syringe barrel 10 is a hollow tubular
body. The front end thereof is a conic opening section 11. The outer
circumference of the opening section 11 is formed with an annular
rib 14. The rear end of the syringe barrel 10 is formed with a notch
15. A plunger 12 is fitted into the syringe barrel 10. The front
end of the plunger 12 is disposed with a rubber ring 13. The rear
end of the plunger 12 is formed with a protuberance 16.
The opening 22 of the cap member 20 is slightly larger than the
base thereof so that the cap member 20 as a whole has a substantially
conic profile. The inner wall face of the cap member 22 is formed
with an annular groove 28. The base of the cap member 20 is formed
with a needle holder 21 for fitting with an injection needle 30.
An emulsion ring 23 integrally formed with a membrane 24 is fitted
onto the base of the cap member 20. The emulsion ring 23 is made
of highly flexible material. A layer of lubricant 25 is overlaid
on the emulsion ring 23 and the membrane 24. A ventilation ring
26 is further placed onto the emulsion ring 23 and the membrane
24. The peripheral wall of the ventilation ring 26 is formed with
multiple vents 27. An O-ring 29 is further fitted onto rear side
of the ventilation ring 26. When packed, the opening 22 of the cap
member 20 is sealed by a sealing layer.
Referring to FIGS. 3 and 4 in use, the sealing layer of the cap
member 20 is first torn away and the opening section 11 of the syringe
barrel 10 is directly placed into the cap member 20. At this time,
the annular rib 14 of the opening section 11 is engaged into the
annular groove 28 of the inner wall face of the opening 22 of the
cap member 20 whereby the front end of the syringe barrel 10 tightly
abuts against the O-ring 29 ventilation ring 26 and emulsion ring
23. Accordingly, the syringe barrel 10 is connected with the cap
member 20 not only by means of the coning, but also by means of
the annular rib and annular groove. Therefore, the syringe barrel
10 and the cap member 20 are double firmly engaged with each other
to reduce void.
During the connection of the syringe barrel 10 and the cap member
20 in the case that air is contained in the syringe barrel 10
the plunger 12 is pressed to the bottom so as to make the air escape
through the vents 27 of the ventilation ring 26 and vacuumize the
space between the rubber ring 13 and the emulsion ring 23. After
the injection needle 30 is thrust into the medicine bottle, the
plunger 12 is pulled backward. At this time, the rubber ring 13
is lubricated by the lubricant 25 and can be easily pulled or pushed.
In addition, the membrane 24 of the emulsion ring 23 has high flexibility
so that when the plunger 12 and the rubber ring 13 are pulled backward,
the membrane 24 is extended and sucked to attach to the wall of
the syringe barrel 10. After the medicine 40 is guided into syringe
barrel 10 through the injection needle 30 the medicine is enclosed
by the emulsion ring 23 and the membrane 24 and isolated from the
wall of the syringe barrel 10 and the rubber ring 13. Therefore,
the syringe barrel 10 and the plunger rubber ring 13 are totally
not contaminated by the medicine 40.
Referring to FIG. 5 after the injection is completed, since the
injection needle 30 has contacted with the patient and the emulsion
ring 23 and membrane 24 in the cap member 20 have been contaminated
by the medicine, the cap member 20 needs to be separated and discarded.
At this time, a user only needs to rotate the plunger 12 to align
the protuberance 16 thereof with the notch 15 of the rear end of
the syringe barrel 10 and then press the plunger 12 to the bottom
to make the rubber ring 13 forcedly push the O-ring 29. At this
time, the annular rib 14 of the front end of the syringe barrel
10 is disengaged from the annular groove 28 of the inner wall face
of the opening 22 of the cap member 20. Under such circumstance,
the cap member 20 can be separated from the syringe barrel 10. The
syringe barrel 10 and the plunger 12 which are not contaminated
by the medicine 40 can be sterilized and recovered for reuse so
as to reduce the amount of medical waste.
According to the above arrangement, the half-disposable syringe
barrel of the present invention can ensure the safety in use of
the injection syringe as well as apparently reduce the amount of
medical waste.
The above embodiment is only used to illustrate the present invention
not intended to limit the scope thereof. Many modifications of the
above embodiment can be made without departing from the spirit of
the present invention. |