CA2454299A1 - Safety fluid injecting/sampling apparatus - Google Patents
Safety fluid injecting/sampling apparatus Download PDFInfo
- Publication number
- CA2454299A1 CA2454299A1 CA002454299A CA2454299A CA2454299A1 CA 2454299 A1 CA2454299 A1 CA 2454299A1 CA 002454299 A CA002454299 A CA 002454299A CA 2454299 A CA2454299 A CA 2454299A CA 2454299 A1 CA2454299 A1 CA 2454299A1
- Authority
- CA
- Canada
- Prior art keywords
- inner barrel
- sampling apparatus
- barrel
- fluid injecting
- needle holder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 38
- 238000005070 sampling Methods 0.000 title claims abstract description 29
- 238000003780 insertion Methods 0.000 claims abstract description 14
- 230000037431 insertion Effects 0.000 claims abstract description 14
- 239000008280 blood Substances 0.000 claims description 21
- 210000004369 blood Anatomy 0.000 claims description 21
- 210000003811 finger Anatomy 0.000 description 3
- 210000003813 thumb Anatomy 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
A safety fluid injecting/sampling apparatus connectable with a needle cannula, the apparatus includes an inner barrel having a receiving hole, an elastically bendable retaining strip with an inwardly protruded engagement tooth disposed at one end, and a retaining hole disposed at the other end, an outer barrel having an axially extended receiving hole adapted to receive the inner barrel, a finger flange extended around the periphery, and an elastically deformable retaining element having an engagement block engageable into the retaining hole of the inner barrel; a needle holds axially slidably inserted into the receiving hole of the inner barrel, the needle holder having a locating groove extended around the periphery and adapted to receive the engagement tooth of the inner barrel for positioning, and an insertion member inserted into the receiving hole of the inns barrel for operation by hand to move the outer barrel backwards relative to the inner barrel.
Description
SAFETY FLUID INJECTING/SAMPLING APPARATUS
BACKGROUND OF T>fl~ INVENTION
1. Field of tire Iws~n The present invention relates generally to safety hypodermic syringes and, more particularly, to a safety fluid injecting/sampling apparatus, which enables the needle holder with the needle cannula to be conveniently pulled back and received inside the apparatus after the service of the apparatus.
BACKGROUND OF T>fl~ INVENTION
1. Field of tire Iws~n The present invention relates generally to safety hypodermic syringes and, more particularly, to a safety fluid injecting/sampling apparatus, which enables the needle holder with the needle cannula to be conveniently pulled back and received inside the apparatus after the service of the apparatus.
2. Dac~ip~r of tie Art In order to prevent contamination, a hypodermic syringe or blood sampler has the needle cannula made r~ractable or to be pulled back after the service of the apparatus. However, conventional safety hypodermic syringes or blood samples are commonly complicated, not easy to fabrication. Further, there are simple designs of safety hypodermic syringes and blood samplers suitable for mass production.
However, these simple designs of safety hypodertric syringes and blood samplers are not practical in use, unable to attract medical persons to use.
Therefore, it is desirable to provide a safety fluid injecting/sampling apparatus that eliminates the aforesaid drawbacks.
StfMMARY OF THE INVENTION
The present invention has been accomplished under the circumstancxs in view It is the main object of the present invention to provide a safely fluid injecting/sampling apparatus, which enables the needle holder with the needle cannula to be pulled back and received on the inside after the service of the apparatus. It is another object of the present invention to provide a safely fluid injeding/sampling apparatus, which can conveniently be operated to control positioningldisplacement of the needle holder with _._~_._..... _. ...__ __. _ .____ . . _ _ .. __.._~ 02454299 2003-12-29 ___."_._.. ..._.,._._..._.._..r_.w . .. ...._....._.
the needle cannula. It is still another object of the present invention to provide a safety fluid injec~inglsampling apparatus, which has a simple struchue for normal functioning.
To achieve these and other objects of the present invention, the safety fluid injectinglsampling apparatus comprises an inner barrel, the inner barrel comprising a cylindrical body defuung a longitudinally exuded receiving hole, an ~astically bendable retaining strip extended from a front end of the cylindrical body of the inner barrel and terminating in an inwardly protruded engagement tooth, a retaining hole formed in the periphery of a rear end of the cylindrical body of the inner barrel remote from the retaining strip; an outer banret, the outer barrel comprising a cylindrical body defining an axially extended receiving hole adapted to reeve the cylindrical body of said inner barrel, a finger flange extended around the periphery of the cylindrical body of the outer barrel, and a retaining element elastically deformably formed on the cylindrical body of the outer barrel, the retaining elennent having an engagt block ~gageable into the retaining hole of the inner barrel; a needle hold, the needle holder comprising a holder body axially slidably inserted into the receiving hole of the inner barrel, and a locating groove extended around the periphery of the holds body and adapted to receive the engagement tooth of the inner barrel; and an insertion her inserted into the receiving hole of the inner barrel for operation by hand to move the outs barrel backwards relative to the inner barrel. Preferably, the insertion member is a plunger so that the safety fluid injecting/sampling apparatus can function as a hypodermic syringe. The insertion member can be a blood collection tube so that the safety fluid injec~inglseunpling apparatus can fia~ction as a blood sample:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of a saf~y fluid injecting/sampling apparatus according to one embodimait of the present invention.
FIG. 2 is a sectional assanbly view of the embodiment shown in FIG. 1, showing the status of the safety fluid injecting/sampling apparatus before injection.
FIG. 3 is similar to FIG. 2 but showing the engagement status betwe~ the plunger and the noodle hoidec FIG. 4 is similar to FIG. 3 but showing the backward pulling status of the outer barrel.
FIG. 5 is similar to FIG. 4 but showing the outer barrel pulled to the back side.
FIG. 6 is similar to FIG. 5 but showing the needle holder disengaged from the constraint of the inner barrel.
FIG. 7 is similar to FIG. 6 but showing the needle holder pulled backwards arid received inside of the inner barrel and assumed the br~ioing status of the plunger.
FIG. 8 illustrates a different arrangement of the needle holder with the needle cannula according to the preset invention.
FIG. 9 is a sectional assembly view of an alternate form of the present invention, showing the safety fluid injecting/sampling apparatus made in the form of a blood sampler FIG. 10 is an end view of the inner barrel of the blood sampler shown in FIG.
9.
FIG. 11 is an exploded view of another alternate form of the present invention, showing the safety fluid injecting/sampling apparatus made in the form of a hypodermic FIG. 12 is a side view in section of the hypod~ric syringe shown in FIG. 11.
FIG. 13 shows the needle holder of the hypodermic syringe of FIG. 12 pulled back and received inside the inner barrel.
However, these simple designs of safety hypodertric syringes and blood samplers are not practical in use, unable to attract medical persons to use.
Therefore, it is desirable to provide a safety fluid injecting/sampling apparatus that eliminates the aforesaid drawbacks.
StfMMARY OF THE INVENTION
The present invention has been accomplished under the circumstancxs in view It is the main object of the present invention to provide a safely fluid injecting/sampling apparatus, which enables the needle holder with the needle cannula to be pulled back and received on the inside after the service of the apparatus. It is another object of the present invention to provide a safely fluid injeding/sampling apparatus, which can conveniently be operated to control positioningldisplacement of the needle holder with _._~_._..... _. ...__ __. _ .____ . . _ _ .. __.._~ 02454299 2003-12-29 ___."_._.. ..._.,._._..._.._..r_.w . .. ...._....._.
the needle cannula. It is still another object of the present invention to provide a safety fluid injec~inglsampling apparatus, which has a simple struchue for normal functioning.
To achieve these and other objects of the present invention, the safety fluid injectinglsampling apparatus comprises an inner barrel, the inner barrel comprising a cylindrical body defuung a longitudinally exuded receiving hole, an ~astically bendable retaining strip extended from a front end of the cylindrical body of the inner barrel and terminating in an inwardly protruded engagement tooth, a retaining hole formed in the periphery of a rear end of the cylindrical body of the inner barrel remote from the retaining strip; an outer banret, the outer barrel comprising a cylindrical body defining an axially extended receiving hole adapted to reeve the cylindrical body of said inner barrel, a finger flange extended around the periphery of the cylindrical body of the outer barrel, and a retaining element elastically deformably formed on the cylindrical body of the outer barrel, the retaining elennent having an engagt block ~gageable into the retaining hole of the inner barrel; a needle hold, the needle holder comprising a holder body axially slidably inserted into the receiving hole of the inner barrel, and a locating groove extended around the periphery of the holds body and adapted to receive the engagement tooth of the inner barrel; and an insertion her inserted into the receiving hole of the inner barrel for operation by hand to move the outs barrel backwards relative to the inner barrel. Preferably, the insertion member is a plunger so that the safety fluid injecting/sampling apparatus can function as a hypodermic syringe. The insertion member can be a blood collection tube so that the safety fluid injec~inglseunpling apparatus can fia~ction as a blood sample:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an exploded view of a saf~y fluid injecting/sampling apparatus according to one embodimait of the present invention.
FIG. 2 is a sectional assanbly view of the embodiment shown in FIG. 1, showing the status of the safety fluid injecting/sampling apparatus before injection.
FIG. 3 is similar to FIG. 2 but showing the engagement status betwe~ the plunger and the noodle hoidec FIG. 4 is similar to FIG. 3 but showing the backward pulling status of the outer barrel.
FIG. 5 is similar to FIG. 4 but showing the outer barrel pulled to the back side.
FIG. 6 is similar to FIG. 5 but showing the needle holder disengaged from the constraint of the inner barrel.
FIG. 7 is similar to FIG. 6 but showing the needle holder pulled backwards arid received inside of the inner barrel and assumed the br~ioing status of the plunger.
FIG. 8 illustrates a different arrangement of the needle holder with the needle cannula according to the preset invention.
FIG. 9 is a sectional assembly view of an alternate form of the present invention, showing the safety fluid injecting/sampling apparatus made in the form of a blood sampler FIG. 10 is an end view of the inner barrel of the blood sampler shown in FIG.
9.
FIG. 11 is an exploded view of another alternate form of the present invention, showing the safety fluid injecting/sampling apparatus made in the form of a hypodermic FIG. 12 is a side view in section of the hypod~ric syringe shown in FIG. 11.
FIG. 13 shows the needle holder of the hypodermic syringe of FIG. 12 pulled back and received inside the inner barrel.
FIG. 14 is an exploded view of still another alternate form of the present invention, showing the safety fluid injecting/sampling apparatus made in the form of a blood sampler:
FIG. 15 is a side view in section of the blood sampler shown in FIG. 14.
FIG. 16 illustrates the needle holder of the blood sampler of FIG. 15 set in the received status atler service.
DETAILED DESCRIIf'fION OF THE INVENTION
Referring to FIGS. 1 and 2, a safety fluid injecting/sampling apparatus acxording to the first emboditr~ant of the present invention is a hypodermic syringe mounted with a needle cannula 60. The hypodermic syringe comprises an inner barre110, an outer barrel Z0, a needle holder 30, a plunger 40, and a stopper 50.
The inner barrel 10 comprises a cylindrical body 11 defining a longitudinally extended receiving hole 12, two elastically bendable retaining strips 13 bilaterally extended from one end, namely, the front end of the cylindrical body 11 in reversed to the extending direction of the needle cannula 60 and terminating in a respectively inwardly protruded engagement tooth 14, two retaining holes 1S bilaterally formed in the periphery of the other end, namely, the rear end of the cylindrical body 11 remote from the raining strips 13, and an end stop portion 16 formed in the rear end of the cylindrical body 11.
The outer barrel 20 comprises a cylindrical body 21 defining an axially extended receiving hole 22 adapted to receive the cylindrical body 11 of the inns barrel 10, a constraint portion 23 formed in the front end of the cylindrical body 21 and adapted to constrain the retaining strips 13 of the inner barrel 10, a finger flange ?,4 extended around the periphery of the cylindrical body 21, and two retaining elts 25 elastically deformably formed integral with the cylindrical body Zi. The raining elements 25 each have an engagement block 26 insertable through the locating holes 15 into the inside of the receiving hole 12 of the cylindrical body 11 of the inner barrel 10.
The needle holder 30 comprises a holds body 31 axially slidably inserted into the receiving hole 12 of the inner barrel 10, an annular groove 32 extended around the periphery of the holder body 31 and mounted with an O-ring 70, which is disposed in close contact with the inside wall of the inner barrel 10, a plug hole 33 axially extended from the center of rear end of the hoide~r body 31, a female engagem~t portion formed in the plug hole 33, and a locating groove 37 extended around the periphery of the hol~r body 31 and adapted to receive the rexaining strips 13 of the inner barrel 10.
The front end of the holder body 31 of the needle holder 30 is provided for the mounting of the needle cannula 60 in any of a variety of conventional mounting The plunger 40 comprises an elongated plunger body 41, a stop flange 42 extended around the periphery of the plunger body 41, a stopper retainer 43 forwardly extended from the front end of the plunger body 41, an male engagement portion forwardly extended from the front end of the stopper retainer 43 and adapted to engage the female engagement portion 34 of the needle holder 30, and a thumb rest 47 formed on the rear axl of the plunger body 41 for the rest of the thumb.
The stopper 50 is fastened to the stopper retainer 43 and supported on the front end of the plunger body 41 and peripherally disposed in close contact with the inside wall (the periphaal wall of the receiving hole 12) of the inner barrel 10.
The operation of the present invention is outlinexi hereinafter. FIG. 2 is an assembly view of the safety fluid injectinglsampling apparatus before use. The status shown in FIG. 2 is similar to the status of use of the safety fluid injeding/sam~ling apparatus to draw in medicine, or the status of use of the saf~y fluid injectinglsampling apparatus to inject medicine. Further, when pulling the plunger 40 backwards, mediane is drawn into the inner barrel 10 through the needle cannula f0. At this time, the needle holder 30 is stopped in position inside the front end of the inner barrel 10, the constraint portion 23 of the outer barrel 20 holds down the retaining strips 13 of the inner barrel 10 in engagement with the locating groove 37 of the needle holder 30, and therefore the needle holder 30 is firmed secured in position against vibration, ensuring safety use of the safety fluid injedinglsampting apparatus.
After injection as shown in FIG. 3, the male engagement portion 44 of the plunge 40 is forced into engagt with the finale engagement portion 34 of the needle holder 30. At this time, the needle holder 30 is movable with the plunger 40.
When wishing to pull the outer barrel 20 backwards from the inner barrel 10 as shown in FIG. 4, hold the thumb rest 47 and then pull the finger flange 24 to move the outer barrel 20 backwards relative to the inner barrel 10, causing the retaining elerna~ts 25 to curve outwards.
FIG. 5 shows the outer barrel 20 moved to the rear limit position where the constraint portion 23 of the outer barrel 20 is disengaged from the raining strips 13, and the engagem~t blocks 26 of the raining elements 25 are respectively stopped at the aid stop portion 16 of the inrasf barrel 10.
FIG. 6 shows the operation of pulling back the needle holder 30. When pushing the outer barrel 20 forwards after the plunger 40 has been pulled back, the locating groove 37 of the needle holder 30 is disengaged from the engag~nent teeth 14 of the retaining strips 13 of the inns barrel 10 and the raining strips 13 are respectively craved outwards, and therefore the needle holder 30 can be moved backwards with the plunger 40.
FIG. 7 shows the plunger 40 pulled the needle holder 30 backwards to the inside of the inner barrel 10, the stop flange 42 stopped at the engagement blocks 26 of the retaining elements 25 of the outer barrel 20. At this time, the user can bend the plunger 40 to break the elongated plunger body 41 at the stop flange 42, keying the front part of the plunger 40, the needle holder 30 and the needle cannula 60 remained inside the receiving hole 12 of the inner barrel 10.
FIG. 8 shows the needle holds adapted to hold a standard detachable needle cannula.
FIGS. 9 and 10 show an alternate form of the safety fluid injecting/sampling apparatus according to the present invention. According to this embodiment, the safely fluid injectinglsampling apparatus is a blood sampler comprising an inner barrel 10A, an outer barrel 20A, a needle holder 30A, and a blood collection tube 40A.
The retaining strips 13A of the inner barrel 10A extend forwards (reversed to the backward extending design of the retaining strips of the inner barrel of the aforesaid first embodiment of the present invention, each having an inwardly protruded engagement tooth 14. The inner barrel 10A further comprises two locating grooves 18A
forming a retaining portion The outer barrel 20A has an engagement block 26A, which is not protruded into the inside of the recaving hole of the inner barrel 10A, and the blood collection tube 40A can be inserted and pulled out to the receiving hole of the inner barrel smoothly.
The needle holder 30A comprises a holder body 31A, and two positioning portions 38A respectively movably coupled to the locating grooves ibA. The positioning portions 38A can be stopped at one end of each of the locating grooves 18A.
The needle cannula has a first pointed tip 61A for insertion into the patient's blood vessel, and a seed pointed tip b1B for insertion into the blood collection tube 40A.
The blood collection tube 40A has a female engagt portion 44A disposed in the front end and adapted to receive a male engagement portion 34A at the rear end of the needle holder 30A.
The operation of this blood satt~ler is substantially similar to the aforesaid first embodiment of the present invention, and therefore no further detailed description in this regard is needed.
FIGS. 1113 show another alternate form of the safely fluid injenting/sampling apparatus. According to this ernbodim~t, the safety fluid injecting/sampling apparatus is a safety hypodermic syringe with a retractable needle cannula. This embodiment has different features as outlined hereinaftea:
The hypodermic syringe further comQrises a spring member 80 mounted in between the inner barrel and the needle holder; the plunge has a receiving hole 48 axially extended to the front end; the stopper has a breaking portion 52 aimed at the receiving hole 48 of the plunger. The breaking portion 52 can be broken by the needle cannula and forced backwards into the inside of the receiving hole 48 of the plunger by the spring merrier 80. The plunger further comprises a stop flange 49 extended around the periphery. During forward stroke of the plunger, the stop flange 49 will be stopped by a part of the inner barrel. D,rring backward stroke after operation, the stop flange 49 will be stopped at the engagement blocks of the outer barrel.
FIGS. 1416 show the safety fluid injecting/sarnpling apparatus made in the form of a blood sampler.
As indicated above, the invention has the following d~aract~istics:
1. By means of moving the outer barrel axially, the positioning or displacement of the needle holder is conveniently controlled.
2. The needle holder engagement control is a simple push-and-pull operation, s W111C~'11S eBS~ t0 8~C111eY8.
3. The combination of the outer barrel and the inner barrel is a simple arrangem~t for conve~nia~t operation
FIG. 15 is a side view in section of the blood sampler shown in FIG. 14.
FIG. 16 illustrates the needle holder of the blood sampler of FIG. 15 set in the received status atler service.
DETAILED DESCRIIf'fION OF THE INVENTION
Referring to FIGS. 1 and 2, a safety fluid injecting/sampling apparatus acxording to the first emboditr~ant of the present invention is a hypodermic syringe mounted with a needle cannula 60. The hypodermic syringe comprises an inner barre110, an outer barrel Z0, a needle holder 30, a plunger 40, and a stopper 50.
The inner barrel 10 comprises a cylindrical body 11 defining a longitudinally extended receiving hole 12, two elastically bendable retaining strips 13 bilaterally extended from one end, namely, the front end of the cylindrical body 11 in reversed to the extending direction of the needle cannula 60 and terminating in a respectively inwardly protruded engagement tooth 14, two retaining holes 1S bilaterally formed in the periphery of the other end, namely, the rear end of the cylindrical body 11 remote from the raining strips 13, and an end stop portion 16 formed in the rear end of the cylindrical body 11.
The outer barrel 20 comprises a cylindrical body 21 defining an axially extended receiving hole 22 adapted to receive the cylindrical body 11 of the inns barrel 10, a constraint portion 23 formed in the front end of the cylindrical body 21 and adapted to constrain the retaining strips 13 of the inner barrel 10, a finger flange ?,4 extended around the periphery of the cylindrical body 21, and two retaining elts 25 elastically deformably formed integral with the cylindrical body Zi. The raining elements 25 each have an engagement block 26 insertable through the locating holes 15 into the inside of the receiving hole 12 of the cylindrical body 11 of the inner barrel 10.
The needle holder 30 comprises a holds body 31 axially slidably inserted into the receiving hole 12 of the inner barrel 10, an annular groove 32 extended around the periphery of the holder body 31 and mounted with an O-ring 70, which is disposed in close contact with the inside wall of the inner barrel 10, a plug hole 33 axially extended from the center of rear end of the hoide~r body 31, a female engagem~t portion formed in the plug hole 33, and a locating groove 37 extended around the periphery of the hol~r body 31 and adapted to receive the rexaining strips 13 of the inner barrel 10.
The front end of the holder body 31 of the needle holder 30 is provided for the mounting of the needle cannula 60 in any of a variety of conventional mounting The plunger 40 comprises an elongated plunger body 41, a stop flange 42 extended around the periphery of the plunger body 41, a stopper retainer 43 forwardly extended from the front end of the plunger body 41, an male engagement portion forwardly extended from the front end of the stopper retainer 43 and adapted to engage the female engagement portion 34 of the needle holder 30, and a thumb rest 47 formed on the rear axl of the plunger body 41 for the rest of the thumb.
The stopper 50 is fastened to the stopper retainer 43 and supported on the front end of the plunger body 41 and peripherally disposed in close contact with the inside wall (the periphaal wall of the receiving hole 12) of the inner barrel 10.
The operation of the present invention is outlinexi hereinafter. FIG. 2 is an assembly view of the safety fluid injectinglsampling apparatus before use. The status shown in FIG. 2 is similar to the status of use of the safety fluid injeding/sam~ling apparatus to draw in medicine, or the status of use of the saf~y fluid injectinglsampling apparatus to inject medicine. Further, when pulling the plunger 40 backwards, mediane is drawn into the inner barrel 10 through the needle cannula f0. At this time, the needle holder 30 is stopped in position inside the front end of the inner barrel 10, the constraint portion 23 of the outer barrel 20 holds down the retaining strips 13 of the inner barrel 10 in engagement with the locating groove 37 of the needle holder 30, and therefore the needle holder 30 is firmed secured in position against vibration, ensuring safety use of the safety fluid injedinglsampting apparatus.
After injection as shown in FIG. 3, the male engagement portion 44 of the plunge 40 is forced into engagt with the finale engagement portion 34 of the needle holder 30. At this time, the needle holder 30 is movable with the plunger 40.
When wishing to pull the outer barrel 20 backwards from the inner barrel 10 as shown in FIG. 4, hold the thumb rest 47 and then pull the finger flange 24 to move the outer barrel 20 backwards relative to the inner barrel 10, causing the retaining elerna~ts 25 to curve outwards.
FIG. 5 shows the outer barrel 20 moved to the rear limit position where the constraint portion 23 of the outer barrel 20 is disengaged from the raining strips 13, and the engagem~t blocks 26 of the raining elements 25 are respectively stopped at the aid stop portion 16 of the inrasf barrel 10.
FIG. 6 shows the operation of pulling back the needle holder 30. When pushing the outer barrel 20 forwards after the plunger 40 has been pulled back, the locating groove 37 of the needle holder 30 is disengaged from the engag~nent teeth 14 of the retaining strips 13 of the inns barrel 10 and the raining strips 13 are respectively craved outwards, and therefore the needle holder 30 can be moved backwards with the plunger 40.
FIG. 7 shows the plunger 40 pulled the needle holder 30 backwards to the inside of the inner barrel 10, the stop flange 42 stopped at the engagement blocks 26 of the retaining elements 25 of the outer barrel 20. At this time, the user can bend the plunger 40 to break the elongated plunger body 41 at the stop flange 42, keying the front part of the plunger 40, the needle holder 30 and the needle cannula 60 remained inside the receiving hole 12 of the inner barrel 10.
FIG. 8 shows the needle holds adapted to hold a standard detachable needle cannula.
FIGS. 9 and 10 show an alternate form of the safety fluid injecting/sampling apparatus according to the present invention. According to this embodiment, the safely fluid injectinglsampling apparatus is a blood sampler comprising an inner barrel 10A, an outer barrel 20A, a needle holder 30A, and a blood collection tube 40A.
The retaining strips 13A of the inner barrel 10A extend forwards (reversed to the backward extending design of the retaining strips of the inner barrel of the aforesaid first embodiment of the present invention, each having an inwardly protruded engagement tooth 14. The inner barrel 10A further comprises two locating grooves 18A
forming a retaining portion The outer barrel 20A has an engagement block 26A, which is not protruded into the inside of the recaving hole of the inner barrel 10A, and the blood collection tube 40A can be inserted and pulled out to the receiving hole of the inner barrel smoothly.
The needle holder 30A comprises a holder body 31A, and two positioning portions 38A respectively movably coupled to the locating grooves ibA. The positioning portions 38A can be stopped at one end of each of the locating grooves 18A.
The needle cannula has a first pointed tip 61A for insertion into the patient's blood vessel, and a seed pointed tip b1B for insertion into the blood collection tube 40A.
The blood collection tube 40A has a female engagt portion 44A disposed in the front end and adapted to receive a male engagement portion 34A at the rear end of the needle holder 30A.
The operation of this blood satt~ler is substantially similar to the aforesaid first embodiment of the present invention, and therefore no further detailed description in this regard is needed.
FIGS. 1113 show another alternate form of the safely fluid injenting/sampling apparatus. According to this ernbodim~t, the safety fluid injecting/sampling apparatus is a safety hypodermic syringe with a retractable needle cannula. This embodiment has different features as outlined hereinaftea:
The hypodermic syringe further comQrises a spring member 80 mounted in between the inner barrel and the needle holder; the plunge has a receiving hole 48 axially extended to the front end; the stopper has a breaking portion 52 aimed at the receiving hole 48 of the plunger. The breaking portion 52 can be broken by the needle cannula and forced backwards into the inside of the receiving hole 48 of the plunger by the spring merrier 80. The plunger further comprises a stop flange 49 extended around the periphery. During forward stroke of the plunger, the stop flange 49 will be stopped by a part of the inner barrel. D,rring backward stroke after operation, the stop flange 49 will be stopped at the engagement blocks of the outer barrel.
FIGS. 1416 show the safety fluid injecting/sarnpling apparatus made in the form of a blood sampler.
As indicated above, the invention has the following d~aract~istics:
1. By means of moving the outer barrel axially, the positioning or displacement of the needle holder is conveniently controlled.
2. The needle holder engagement control is a simple push-and-pull operation, s W111C~'11S eBS~ t0 8~C111eY8.
3. The combination of the outer barrel and the inner barrel is a simple arrangem~t for conve~nia~t operation
Claims (10)
1. A safety fluid injecting/sampling apparatus comprising:
an inner barrel, said inner barrel comprising a cylindrical body defining a longitudinally extended receiving hole, an elastically bendable retaining strip extended from a front end of the cylindrical body of said inner barrel and terminating in an inwardly protruded engagement tooth, a retaining hole formed in the periphery of a rear end of the cylindrical body of said inner barrel remote from said retaining strip;
an outs barrel, said outer barred comprising a cylindrical body defining an axially extended receiving hole adapted to receive the cylindrical body of said inner barrel, a finger flange extended around the periphery of the cylindrical body of said outer barrel, and a raining element elastically deformably formed on the cylindrical body of said outer barrel, said retaining element having an engagement block engageable into the retaining hole of said inner barrel;
a needle holder, said needle holder comprising a holds body axially slidably inserted into the receiving hole of said inner barrel, and a locating groove extended around the periphery of said holder body and adapted to receive the engagement tooth of said inner barrel; and an insertion member inserted into the receiving hole of said inner barrel for operation by hand to move said outer barrel backwards relative to said inner barrel.
an inner barrel, said inner barrel comprising a cylindrical body defining a longitudinally extended receiving hole, an elastically bendable retaining strip extended from a front end of the cylindrical body of said inner barrel and terminating in an inwardly protruded engagement tooth, a retaining hole formed in the periphery of a rear end of the cylindrical body of said inner barrel remote from said retaining strip;
an outs barrel, said outer barred comprising a cylindrical body defining an axially extended receiving hole adapted to receive the cylindrical body of said inner barrel, a finger flange extended around the periphery of the cylindrical body of said outer barrel, and a raining element elastically deformably formed on the cylindrical body of said outer barrel, said retaining element having an engagement block engageable into the retaining hole of said inner barrel;
a needle holder, said needle holder comprising a holds body axially slidably inserted into the receiving hole of said inner barrel, and a locating groove extended around the periphery of said holder body and adapted to receive the engagement tooth of said inner barrel; and an insertion member inserted into the receiving hole of said inner barrel for operation by hand to move said outer barrel backwards relative to said inner barrel.
2. The safety fluid injecting/sampling apparatus as claimed in claim 1, wherein said insertion member is a plunger, and said needle holder holds a needle cannula for enabling the safety fluid injecting/sampling apparatus to function as a hypodermic syringe.
3. The safety fluid injecting/sampling apparatus as claimed in claim 2, wherein said plunger has a receiving hole axially extended to a front end thereof and adapted to receive said needle holder.
4. The safety fluid injecting/sampling apparatus as claimed in claim 1, wherein said insertion member is a blood collection tube, and said needle holder is mounted with a blood sailing needle, for enabling the safety fluid injecting/sampling apparatus to function as a blood sampler.
5. The safety fluid injecting/sampling apparatus as claimed in claim 1, wherein said insertion member is adapted to pull said needle holder backwards to the inside of said inner barrel.
6. The safely fluid injecting/sampling apparatus as claimed in claim 5, wherein said insertion member comprises an engagement portion, and said needle holder comprises an engagement portion adapted to receive the engagement portion for enabling said needle holder to be pulled backwards with said insertion member into the inside of said inner barrel.
7. The safety fluid injecting/sampling apparatus as claimed in claim 1, wherein said needle holder is automatically retractable.
8. The safety fluid injecting/sampling apparatus as claimed in claim 1, wherein said inner barrel comprises a locating groove, said needle holder comprises a positioning portion adapted to engage the locating groove of said inner barrel.
9. The safety fluid injecting/sampling apparatus as claimed in claim 1, wherein the engagement block of said outer barrel projects into the receiving hole of the cylindrical body of said inner barrel at a distance.
10, The safety fluid injecting/sampling apparatus as claimed in claim 9, wherein said insertion member comprises a stop flange adapted to stop said insertion member inside said outer barrel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02294498.2 | 2002-12-31 | ||
| CN 02294498 CN2589962Y (en) | 2002-12-31 | 2002-12-31 | Liquid injection/taking device with self-retractable needle seat |
| CN02294490.7 | 2002-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2454299A1 true CA2454299A1 (en) | 2004-06-30 |
Family
ID=29430003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002454299A Abandoned CA2454299A1 (en) | 2002-12-31 | 2003-12-29 | Safety fluid injecting/sampling apparatus |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN2589962Y (en) |
| CA (1) | CA2454299A1 (en) |
| IT (1) | ITMI20030610U1 (en) |
| ZA (1) | ZA200309927B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991505A (en) * | 2017-12-21 | 2018-05-04 | 睿科仪器（厦门）有限公司 | A kind of auto spring puncture needle sampling structure |
| CN118362354A (en) * | 2024-06-18 | 2024-07-19 | 宝鸡市盟泰石油机械有限公司 | Portable acquisition and detection device and detection method for petrochemical industry |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102106735A (en) * | 2010-11-29 | 2011-06-29 | 张蔚楠 | Pen type safety blood taking needle |
| MX339740B (en) * | 2011-05-18 | 2016-06-07 | Becton Dickinson Co | Injection device. |
| CN105596013A (en) * | 2016-02-06 | 2016-05-25 | 湛江健力源医疗用品有限公司 | Shrinkage safety blood collecting needle |
-
2002
- 2002-12-31 CN CN 02294498 patent/CN2589962Y/en not_active Expired - Fee Related
-
2003
- 2003-12-22 ZA ZA200309927A patent/ZA200309927B/en unknown
- 2003-12-23 IT ITMI20030610 patent/ITMI20030610U1/en unknown
- 2003-12-29 CA CA002454299A patent/CA2454299A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991505A (en) * | 2017-12-21 | 2018-05-04 | 睿科仪器（厦门）有限公司 | A kind of auto spring puncture needle sampling structure |
| CN118362354A (en) * | 2024-06-18 | 2024-07-19 | 宝鸡市盟泰石油机械有限公司 | Portable acquisition and detection device and detection method for petrochemical industry |
| CN118362354B (en) * | 2024-06-18 | 2024-08-16 | 宝鸡市盟泰石油机械有限公司 | Portable acquisition and detection device and detection method for petrochemical industry |
Also Published As
| Publication number | Publication date |
|---|---|
| ITMI20030610U1 (en) | 2004-07-01 |
| CN2589962Y (en) | 2003-12-03 |
| ZA200309927B (en) | 2004-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20071231 |