CN100467077C - Syringe with back-suction - Google Patents
Syringe with back-suction Download PDFInfo
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- CN100467077C CN100467077C CNB2005101039404A CN200510103940A CN100467077C CN 100467077 C CN100467077 C CN 100467077C CN B2005101039404 A CNB2005101039404 A CN B2005101039404A CN 200510103940 A CN200510103940 A CN 200510103940A CN 100467077 C CN100467077 C CN 100467077C
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- needle stand
- syringe
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- pillar
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Abstract
The present invention relates to a syringe with back-drawing force. Said syringe is formed from the following several portions: a syringe tube; a needle seat set; a spacing component; a pushing rod; and a back-drawing device. Said invention also provides the concrete structure of the above-mentioned every portion and the working principle of said syringe.
Description
[technical field]
The present invention relates to a kind of syringe, but particularly relate to the syringe with back-suction of a kind of pumpback and hiding needle body.
[background technology]
Syringe after the general injection must be dealt carefully with sharp-pointed needle body, avoids needle body to stab human body, even is remained in the blood infection that has the source of infection on the needle body.Though conventional syringe includes the pin lid that coats needle body, but the situation of losing, dropping is often arranged, and because the pin lid can be quite limited for the aperture that needle body places, so, user must carefully be done back the action of trocar lid after finishing injection, if careless slightly or be subjected to the external force effect, the acupuncture incident is just easily arranged, so the disappearance on the safety is arranged in use.
Therefore, in order to improve above-mentioned syringe cylinder disappearance in the use, previous researched and developed and in No. 93112143 " syringe " application for a patent for invention case of TaiWan, China application with back-suction, mainly be after injection is finished, utilize the design of power-assisted or ultromotivity drawing back needling body and hiding needle body, avoid stabbing personnel, the injury of exempting the daily use syringe cylinder of medical personnel is with frightened, importantly, No. 93112143 application for a patent for invention case of this TaiWan, China can be by the spatial design of a wide section of putting, remove the fixing state of this needle stand, the smoothness when promoting this needle stand of pumpback.
Yet even No. 93112143 application for a patent for invention case of this TaiWan, China dwindled at the caliber that do not increase under the situation of caliber, the smoothness during its needle stand pumpback still has the space that can promote.
[summary of the invention]
The object of the present invention is to provide a kind of syringe with back-suction that can make syringe caliber minimization.
In order to achieve the above object, the invention provides a kind of syringe, it is characterized in that: include with back-suction:
One syringe has around an axis and define a macropore and a surrounding wall in a little duct, and this syringe surrounding wall has oppositely and in abutting connection with the port of export in this little duct and in abutting connection with an arrival end of this macropore;
One needle stand group has a pillar, hollow and runs through a needle stand of this pillar, and a needle body, this pillar and this needle stand be fixing between the large and small duct of this syringe, this needle body is fixed and pass this syringe with this needle stand;
One locating part, be airtight fixing in the macropore of this syringe, and have along this axis direction run through and with the localized perforation of this needle stand group fit;
One push rod is can slide against in the macropore of this syringe, and passes this locating part towards this syringe port of export displacement, and removes the positioning relation with this needle stand group, and this push rod also has around this axis and defines a tube wall of a tube chamber; And
One pumpback device, have a spigot and and reply part, this spigot is the end face of detachable this putter face of liftoff sealing to this locating part, and can link with the needle stand of this needle stand group, this answer part is to be contained in this tube chamber, and can after this spigot unloads this push rod, produce back-suction, and drive that this spigot drives this needle stand and this needle body is moved to this pusher tube intracavity along this pillar.
Described syringe with back-suction, it is characterized in that, this syringe also has a terrace edge that is formed between this macropore and this little duct, the length of this needle stand group pillar is to be shorter than this needle stand, and have a front end rigion that is resisted against this terrace edge, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
Described syringe with back-suction, it is characterized in that, this syringe also has around this axis and is formed on a plurality of spacer fins between this large and small duct, aforementioned spacer fin has the ora terminalis towards this macropore, and be formed on a protuberance of this ora terminalis, and the length of this needle stand group pillar is to be shorter than this needle stand, and has the front end rigion of fixing at aforementioned fin protuberance, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
Described syringe with back-suction, it is characterized in that, this syringe aperture road has a locating hole section in abutting connection with this macropore, is slightly larger than a wide section of putting of this locating hole section in abutting connection with this locating hole section and aperture, in abutting connection with this wide section of putting and this port of export and aperture less than a pin hole section of this wide section of putting, and be formed on this wide section of putting and the intersegmental shoulder of this pin hole, the needle stand of this needle stand group has a front end rigion that is positioned at this locating hole section, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
Described syringe with back-suction is characterized in that, the pillar of this needle stand group has and places a front end rigion that is positioned at this little duct of syringe, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
Described syringe with back-suction, it is characterized in that, this syringe aperture road has a locating hole section in abutting connection with this macropore, in abutting connection with this locating hole section and this port of export and aperture less than a pin hole section of this locating hole section, and be formed on this locating hole section and the intersegmental shoulder of this pin hole, the front end rigion of this needle stand group pillar is to be resisted against this syringe shoulder, this needle stand have place spacing in this pillar and and this shoulder between be formed with a front end rigion of a start-up space, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
Described syringe with back-suction, it is characterized in that, the needle stand of this needle stand group also has a perforation that is formed on this rear end section, this locating part also have along this axis direction be communicated with this perforation and the aperture greater than a reaming of this perforation, this needle stand perforation is emerging in this reaming.
Described syringe with back-suction is characterized in that, this locating part also has and is formed in this reaming and a plurality of folder ribs of spacing this needle stand rear end section.
Described syringe with back-suction is characterized in that, aforementioned folder rib has a rearward end that is formed with a closely spaced leading section, spacing this needle stand rear end section with this needle stand respectively, and a card of this needle stand rear end section of block ends rib.
Described syringe with back-suction, it is characterized in that, this needle stand group has also that external diameter and this needle stand internal diameter are urgent to be cooperated and a endless tube that inner chamber can ccontaining this needle body, this endless tube is to be contained in advance in this needle stand, after supplying this needle body to place, be filled between this needle stand and this endless tube and this needle body with viscose glue, this needle body and this endless tube and this needle stand are bonded as one.
Described syringe with back-suction is characterized in that, this pillar and this needle stand are a kind of tubular structures of hard thin-walled.
Described syringe with back-suction is characterized in that, this pillar and this needle stand can be respectively that metal, carbon fiber, engineering plastic are wherein a kind of.
In sum, the invention is characterized in: this syringe with back-suction comprises a syringe, a needle stand group, a locating part, a push rod and a pumpback device.This syringe has around an axis and define a macropore and a surrounding wall in a little duct, and this syringe surrounding wall has oppositely and in abutting connection with the port of export in this little duct and in abutting connection with an arrival end of this macropore.This needle stand group has a pillar, hollow and runs through a needle stand of this pillar, and a needle body, this pillar and this needle stand be fixing between the large and small duct of this syringe, this needle body is fixed and pass this syringe with this needle stand.This locating part be airtight fixing in the macropore of this syringe, and have along this axis direction run through and with the localized perforation of this needle stand group fit.This push rod is can slide against in the macropore of this syringe, and passes this locating part towards this syringe port of export displacement, and removes the positioning relation with this needle stand group, and this push rod also has around this axis and defines a tube wall of a tube chamber.This pumpback device has a spigot and and replys part, this spigot is the end face of detachable this putter face of liftoff sealing to this locating part, and can link with the needle stand of this needle stand group, this answer part is to be contained in this tube chamber, and can after this spigot unloads this push rod, produce back-suction, and drive that this spigot drives this needle stand and this needle body is moved to this pusher tube intracavity along this pillar.Effect of the present invention is the syringe that can be applicable to minimum caliber, and smoothness and convenience can promote needle stand and needle body pumpback the time.
Syringe with back-suction of the present invention has following advantage and effect:
Since the pillar of this needle stand group and the material that needle stand can be hard thin-walled make, therefore, the caliber of this needle stand group can contract to minimum, relative, this push rod also just can cooperate with the caliber of this syringe and dwindles, so, when this syringe during as the medicament injector of minimum dosage (as 1CC), can extend suitable length, unit capacity scale (as the 0.01cc) spacing that is formed on this syringe 1 is strengthened, whereby, the injected dose that medical personnel can more accurate control medicine promotes the practicality that injection uses and the safety of treatment.
2. and this needle stand when being pushed, this needle stand one front end rigion can enter the looser wide section of putting by friction tight locating hole section, whereby, can make the needle stand that is urgent positioning states, in the process that is pushed, have an activity effect, so the resistance when lowering this needle stand and detaching this locating hole section, the simplification in the time of promoting this needle stand and this needle body pumpback.
Moreover, the present invention can utilize this pillar to connect and expand this locating part and this piston, and intercept this needle stand and contact, and the frictional resistance can significantly reduce this needle stand displacement time the, and then the smoothness when promoting this needle stand and this needle body pumpback with this locating part and this piston.
4. can be and between this needle body and this needle stand, and can promote the efficient of bonding processing procedure between this needle stand and this needle body by this endless tube as agglutinating media, and promote the degree of stability of this needle body when fixed.
[description of drawings]
The present invention is described in detail below in conjunction with drawings and Examples.
Fig. 1 is a cutaway view, illustrates that the present invention one has first preferred embodiment of the syringe of back-suction.
Fig. 2 is an exploded view, and a needle stand group in this first preferred embodiment is described.
Fig. 3 is a part of cutaway view, illustrates in this first preferred embodiment when injection is finished that a spigot plants in the locating part.
Fig. 4 is a part of cutaway view, illustrates that a push rod is pushed this needle stand one front end rigion in this first preferred embodiment to enter in the wide section of putting.
Fig. 5 is a part of cutaway view, illustrates that this spigot engages with a needle stand in this first preferred embodiment, reaches this locating part and a piston ring and covers a pillar periphery.
Fig. 6 is a cutaway view, and this this needle stand of first preferred embodiment pumpback and needle body is described.
Fig. 7 is a cutaway view, illustrates that the present invention one has second preferred embodiment of the syringe of back-suction.
Fig. 8 is a cutaway view, and this second preferred embodiment pumpback, one needle stand and needle body is described.
Fig. 9 is a cutaway view, illustrates that the present invention one has the 3rd preferred embodiment of the syringe of back-suction.
Figure 10 is a cutaway view, and the 3rd preferred embodiment pumpback one needle stand and a needle body are described.
Figure 11 is a cutaway view, is the 4th preferred embodiment of the syringe of the present invention one with back-suction, illustrates that a pillar fixes an ora terminalis that is positioned at most spacer fins.
Figure 12 is a cutaway view, is the 5th preferred embodiment of the syringe of the present invention one with back-suction, illustrate that a pin base fastener terminates in a reaming of a locating part, and a pillar is to be resisted against on the terrace edge of a syringe with a front end rigion.
Figure 13 be among Figure 12 along the cutaway view of straight line 13-13 direction, the positioning relation of a locating part and a needle stand is described.
Figure 14 is a cutaway view, is the 6th preferred embodiment of the syringe of the present invention one with back-suction, and explanation one pin base fastener terminates in a reaming of a locating part, and a pillar is the ora terminalis that is resisted against most spacer fins with the enlarging of a front end rigion.
Figure 15 is a cutaway view, is the 7th preferred embodiment of the syringe of the present invention one with back-suction, illustrate that a pillar is to be resisted against on the shoulder with a front end rigion, and a front end rigion of a needle stand is to be set in this pillar.
Figure 16 is a cutaway view, illustrates that this needle stand is pushed and is moved to this front end rigion in the 7th preferred embodiment to be resisted against on this shoulder.
[specific embodiment]
Before the present invention is described in detail, be noted that in the following description content similar elements is to represent with identical numbering.
Consult Fig. 1, Fig. 2 and Fig. 3, first preferred embodiment that the present invention has the syringe of back-suction comprises: a syringe 1, a needle stand group 2, a locating part 3, a push rod 4 and a pumpback device 5.
This syringe 1 have around an axis X and define a macropore 11 and an aperture road 12 a surrounding wall 13, be connected the camber taper seat 14 in this macropore 11 and this aperture road 12, and be formed on this camber taper seat 14 and give prominence in this large and small duct a plurality of spacer fins 15 of 11,12, and by this surrounding wall 13 give prominence to this macropore 11 in and contiguous this hole, trail 12 one encircle rib 16.This surrounding wall 13 has a reverse port of export 131 and an arrival end 132.This aperture road 12 has a locating hole section 121 in abutting connection with this camber taper seat 14 and aforementioned spacer fin 15, is slightly larger than a wide section of putting 122 of this locating hole section 121 in abutting connection with this locating hole section 121 and aperture, in abutting connection with this wide section of putting 122 and this port of export 131 and aperture less than a pin hole section 123 of this wide section of putting 122, be formed on a shoulder 124 of 123 of this wide section of putting 122 and this pin hole sections, and be formed on a terrace edge 125 of 121 of this camber taper seat 14 and this locating hole sections.Aforementioned spacer fin 15 has the ora terminalis 151 towards this macropore 11.
This needle stand group 2 has a pillar 21, the hollow of a needle body 20, hollow and runs through a needle stand 22 of this pillar 21, and external diameter and these needle stand 22 internal diameters are urgent cooperates and a endless tube 23 that inner chamber can ccontaining this needle body 20.This needle body 20 has one flat mouthful of reverse section 201 and one needle point section 202.The length of this pillar 21 is to be shorter than this needle stand 22, and ring protects in this needle stand 22 peripheries, and this pillar 21 is that a kind of hard thin layer tube wall is (as metal, carbon fiber, engineering plastic with this needle stand 22 ... Deng) tubular structure, and have respectively and be resisted against this syringe 1 terrace edge 125 and a urgent front end rigion 211,221 that is positioned at this locating hole section 121, and be set in the rear end section 212,222 in this macropore 11.This endless tube 23 is to be contained in this needle stand 22, after being set in this endless tube 23 for 20 flat mouthfuls of sections 201 of this needle body, be filled to 201 of this needle stand 22 and this endless tube 23 and 20 flat mouthfuls of sections of this needle body with viscose glue, 20 flat mouthfuls of sections 201 of this needle body are bonded as one with this endless tube 23 and this needle stand 22, and make these needle body 20 needle point sections 202 pass this syringe 1 by these syringe 2 ports of export 131.
This locating part 3 is in the airtight macropore 11 that is packed in this syringe 1, and engage the location with this ring rib 16, this locating part 3 and have along this axis X direction run through and with the reaming 32 of this pillar 21, the localized perforation 31 of these needle stand 22 rear end section 212,222 airtight fits, aperture greater than this perforation 31, and be formed on a stop ring 34 of this perforation 31 and 32 of this reamings and these needle stand 2 rear end section 222 of block.
This push rod 4 is can slide against in the macropore 11 of this syringe 1, and has around this axis X and define a tube wall 42, a piston 43 of a tube chamber 41, and an end cap 44.This tube wall 42 has towards a front end face 421 of this locating part 3 and open this tube chamber 41, is in reverse to a rear end face 422 of this front end face 421 and open this tube chamber 41, in abutting connection with the tubule footpath section 423 of this front end face 421, in abutting connection with a big caliber section 424 of this tubule footpath section 423, in abutting connection with an enlarged cavity section 425 of this big caliber section 424 and this rear end face 422, and be formed on the shoulder 426 of 424,423 of this large and small caliber sections.This piston 43 is to be nested with at this tube wall 42 tubules footpath section 423 and this front end face 421, and with these syringe 1 surrounding wall 13 airtight contacts.This end cap 44 is these tube wall 42 rear end faces 422 of sealing.
This pumpback device 5 has a spigot 51 and and replys part, and this answer part is an extension formula spring 52 at present embodiment, and is compressed in the tube chamber 41 of these push rod 4 big caliber sections 424.This spigot 51 be detachable liftoff fixing in the tube chamber 41 of these push rod 4 large and small caliber sections 424,423, and seal this tube wall 42 front end faces 421, and have a front end rigion 511 that passes these tube wall 42 front end faces 421.This spring 52 has a reverse pushing and withstanding end 521 and a positioning end 522, and this pushing and withstanding end 521 is fixed with this spigot 51, and this positioning end 522 is to be positioned on the shoulder 426 of this tube wall 42.
Consult Fig. 3, when this push rod 4 is passed to the injection stroke terminal point, and after finishing the injection purposes, this push rod 4 can contact with locating part 3 with this piston 43, and place in the reaming 33 of this locating part 3 with these spigot 51 1 front end rigions 511, at this moment, user need only continue to pass this push rod 4, just can be in the process of these syringe 1 port of export 131 displacements at this push rod 4, the needle stand 22 of pushing this locating part 3 and engaging with this locating part 3.
Consult Fig. 4, when this needle stand 22 is pushed, can be along this pillar 21 towards these syringe 1 port of export 131 displacements, these needle stand 22 front end rigions 221 can enter this wide section of putting 122 to being hampered by this shoulder 124, whereby, can make and this locating hole section 121, and aforementioned spacer fin 15 is the needle stand 22 of urgent positioning states, in the process that is pushed, have an activity effect, and then the resistance when lowering this needle stand 22 and detaching this locating hole section 121, at this moment, because the front end rigion 211 of this pillar 21 is hampered by the terrace edge 125 of this syringe 1, further displacement, therefore, the locating part 3 that pushed by this push rod 4 can these port of export 131 displacements Zhou Dynasty outside these pillar 21 rear end section 212.
Consult Fig. 5, this push rod that continues to advance 4 can make this spigot 51 front end rigions 511 urgent rear end section 222 that plug together this needle stand 22, and the interlock state that formation fixes, and make this spigot 51 be subjected to this needle stand 22 oppositions, and remove the fixing state of this spigot 51 and this tube wall 42, and unload the large and small caliber section 424,423 of this tube wall 42, at the same time, this locating part 3 can continue displacement along these pillar 21 peripheries, to the ora terminalis 151 that is limited to aforementioned spacer fin 15, and the rear end section 212 of this pillar 21 can be gone in the tube chamber 41 of push rod 4 tubules footpath section 423 in plant.
Consult Fig. 6, whereby, this spring 52 can start bullet and open and discharge back stretch, and with these pushing and withstanding end 521 these spigots 51 of drive, this needle stand 22 and this needle body 20, at this moment, because this pillar 21 can connect and expand the perforation 31 of this locating part 3, and this piston 43, and intercept contacting of this needle stand 22 and this locating part 3 and this piston 43, simultaneously, by this pillar 21 and 22 level and smooth fits of hard rigid material tubing string of this needle stand, most less characteristics of friction system, the smoothness when promoting these needle stand 22 pumpback slippages, make this needle stand 22 with this needle body 20 by this spigot 51 swimmingly along these pillar 21 slippages, and towards these push rod 4 tube chambers 41 intrinsic displacements, and this needle stand 22 is retained in the tube chamber 41 of this push rod 4 with this needle body 20.Make the syringe 1 that abandons to isolate this needle body 20 with this surrounding wall 13 and the tube wall 42 of this push rod 4, after the release medical personnel use conventional syringes, contact with needle body, cause danger injured, that infect because tidying up the syringe needle group.
What deserves to be mentioned is, because being materials of hard thin-walled, the pillar 21 and the needle stand 22 of this needle stand group 2 make (as metal, carbon fiber, engineering plastic ... Deng), therefore, this pillar 21 can contract to minimum with the caliber of this needle stand 22, relative, this push rod 4 also just can cooperate with the caliber of this syringe 1 and dwindles, so, when this syringe 1 as Fig. 1 during to the medicament injector as minimum capacity (as 1cc) shown in Figure 6, be to extend suitable length along this axis X direction, unit capacity (as the 0.01cc) scale spacing that is indicated on this syringe 1 is strengthened, and whereby, medical personnel can more accurate control drug injection amount.
Consulting Fig. 7, Fig. 8, is the present invention's second preferred embodiment, and this second preferred embodiment is the syringe (as the syringe of capacity 1CC) that is applied in minimum capacity equally, and itself and first preferred embodiment are roughly the same, difference be in:
This pumpback device 5 has a spigot 53 and and replys part, and this answer part is a kind of compression spring 54 at present embodiment, and is positioned at by tension in the tube chamber 41 of this push rod 4.When the fixing state of this spigot 53 and push rod 4 tube walls 42 is disengaged, it is elastic-restoring force by this spring 54, this spigot 53 of pumpback in the process of elastic shrinkage, make these spigot 53 these needle stands 22 of drive and this needle body 20 towards these push rod 4 tube chambers 41 intrinsic displacements, and then this needle stand 22 is retained in these push rod 4 tube chambers 41 with this needle body 20.
Consulting Fig. 9, Figure 10, is the present invention's the 3rd preferred embodiment, and the 3rd preferred embodiment is the syringe (as the syringe of capacity 1CC) that is applied in minimum capacity equally, and itself and first, second preferred embodiment is roughly the same, difference be in:
This pumpback device 5 also have be nested with on this spigot 55 and with these tube wall 42 big caliber section 424 airtight corks 56 that contact, making this answer part is a kind of utmost point low pressure that is formed in these push rod 4 tube chambers 41.When the fixing state of this spigot 55 and these push rod 4 tube walls 42 is disengaged, can makes air pressure flow to this extremely hypobaric tube chamber 41 and produce back-suction, and can and be accommodated in the tube chamber 41 of push rod 4 this needle stand 22 and these needle body 20 pumpbacks by the external world.
Consulting Figure 11, is the present invention's the 4th preferred embodiment, and the 4th preferred embodiment is the syringe (as the syringe of capacity 1CC) that is applied in minimum capacity equally, and itself and first, second and third preferred embodiment is roughly the same, difference be in:
The front end rigion 211 of these needle stand group 2 pillars 21 is to form an enlarging, and solid with protuberance 152 covers of aforementioned spacer fin 15 ora terminalis 151, makes these pillar 21 front end rigions 211 obtain the location.
Whereby, this pillar 21 can connect and expand perforation 31 and this piston 43 of this locating part 3 equally, and intercept this needle stand 22 and contact with this locating part 3 and this piston 43, frictional resistance when significantly reducing these needle stand 22 pumpback displacements makes this needle stand 22 can be moved in the tube chamber 41 of this push rod 4 along these pillar 21 pumpbacks by aforementioned respectively this spigot swimmingly with this needle body 20.
Consulting Figure 12, Figure 13, is the present invention's the 5th preferred embodiment, and the 5th preferred embodiment is the syringe (as the syringe of capacity 1CC) that is applied in minimum capacity equally, and itself and first, second and third preferred embodiment is roughly the same, difference be in:
The needle stand 22 of this needle stand group 2 also has at least one perforation 223 that is formed on this rear end section 222.And these needle stand 22 rear end section 222 are to extend to be set in the reaming 32 of this locating part 3 at present embodiment.
This locating part 3 also has a plurality of folder ribs 33 that are formed in this reaming 32.Aforementioned folder rib 33 has a rearward end 332 that is formed with a closely spaced leading section 331, spacing these needle stand 22 rear end section 222 with this needle stand 22 respectively, and a card of these needle stand 2 rear end section 222 of block ends rib 333.
Whereby, when this push rod 41 is passed extremely near the injection stroke terminal point, these spigot 51 front end rigions 511 are progressively fashionable with these needle stand 22 rear end section 222 covers, be contained in the medicament of 3 of this piston 43 and this locating parts, can be by the space of 33 in these locating part 3 aforementioned folder ribs, gap through 22 of aforementioned folder rib 33 leading sections 331 and this needle stands, and the perforation 223 of these needle stand 22 rear end section 222 enters in this needle body 20, and the whole injections of medicament can be finished, and make this syringe 1 after finishing injection, become the state that to re-use immediately.At this moment, user need only continue to pass this push rod 4 towards these syringe 1 port of export 131 displacements, and this needle stand 22 is moved in these push rod 4 tube chambers 41 along these pillar 21 pumpbacks by aforementioned respectively this spigot swimmingly with this needle body 20.
Consult Figure 14, it is the present invention's the 6th preferred embodiment, the 6th preferred embodiment is the syringe (as the syringe of capacity 1CC) that is applied in minimum capacity equally, itself and the 5th preferred embodiment are roughly the same, these needle stand 22 rear end section 222 are to extend to be set in the reaming 32 of this locating part 3 at present embodiment equally, and has an at least one perforation 223 that is formed on this rear end section 222, difference be in: this pillar 21 is identical with aforementioned the 4th preferred embodiment, be the protuberance 152 that is resisted against these aforementioned spacer fin 15 ora terminalis 151 with these front end rigion 211 enlargings, and obtain the location.
Whereby, be contained in the medicament of 3 of this piston 43 and this locating parts, equally can be by the space of 33 in these locating part 3 aforementioned folder ribs, gap through 22 of aforementioned folder rib 33 leading sections 331 and this needle stands, and the perforation 223 of these needle stand 22 rear end section 222 enters in this needle body 20, and the whole injections of medicament can be finished, and make this syringe 1 after finishing injection, become the state that to re-use immediately.And user need only continue to pass this push rod 4 towards these syringe 1 port of export 131 displacements, and this needle stand 22 is moved in these push rod 4 tube chambers 41 along these pillar 21 pumpbacks by aforementioned respectively this spigot swimmingly with this needle body 20.
Consulting Figure 15, Figure 16, is the present invention's the 7th preferred embodiment, and the 7th preferred embodiment can be applied in the syringe (as the syringe of capacity 1CC) of minimum capacity equally, itself and first, second and third, five preferred embodiments are roughly the same, difference be in:
The locating hole section 121 of this syringe 1 is can be along parallel this axis X direction extension and respectively in abutting connection with this camber taper seat 14 and this shoulder 124.
These pillar 21 front end rigions 211 are to place the locating hole section 121 that is positioned at this syringe 1 aperture road 12, and are resisted against the shoulder 124 of this syringe 1.These pillar 21 rear end section 212 are that fit is positioned in the perforation 31 of this locating part 3.
These needle stand 22 front end rigions 221 be place spacing in this pillar 21 and and 124 of this shoulders be formed with a start-up space 224.These needle stand 22 rear end section 222 are to pass this pillar 21 and fit is positioned in the perforation 31 of this locating part 3.Whereby, protect these needle stand 22 front end rigions 221 of fixing with these pillar 21 rings respectively, and, make this needle stand 22 obtain the location with these needle stand 22 rear end section 222 of these locating part 3 fixings.
When this needle stand 22 is pushed, can be along this pillar 21 towards these syringe 1 port of export 131 displacements, these needle stand 22 front end rigions 221 can enter this start-up space 224 to being hampered by this shoulder 124, whereby, can make and be urgent positioning states with locating part 3 perforations 31 and be set in needle stand 22 in this pillar 21, in the process that is pushed, have an activity effect equally, and then the resistance when lowering this needle stand 22 and detaching this locating part 3 with this pillar 21.
According to the above as can be known, the syringe with back-suction of the present invention has following advantage and effect:
1. because the pillar 21 of this needle stand group 2 and needle stand 22 can be the materials of hard thin-walled makes, therefore, the caliber of this needle stand group 2 can contract to minimum, relative, this push rod 4 also just can cooperate with the caliber of this syringe 1 and dwindles, so, when this syringe 1 during as the medicament injector of minimum dosage (as 1CC), can extend suitable length, unit capacity scale (as the 0.01cc) spacing that is formed on this syringe 1 is strengthened, whereby, the injected dose that medical personnel can more accurate control medicine promotes the practicality that injection uses and the safety of treatment.
2. and this needle stand 22 when being pushed, these needle stand 22 1 front end rigions 221 can enter the looser wide section of putting 122 by friction tight locating hole section 121, whereby, can make the needle stand 22 that is urgent positioning states, in the process that is pushed, have an activity effect, so the resistance when lowering this needle stand 22 and detaching this locating hole section 212, the simplification in the time of promoting this needle stand 22 with these needle body 20 pumpbacks.
Moreover, the present invention can utilize this pillar 21 to connect and expand this locating part 3 and this piston 43, and intercept this needle stand 22 and contact, and the frictional resistance can significantly reduce these needle stand 22 displacements time the, and then the smoothness when promoting this needle stand 22 with these needle body 20 pumpbacks with this locating part 3 and this piston 43.
4. and 22 of this needle body 20 and this needle stands can be by this endless tube 23 as agglutinating media, and can promote the efficient of this needle stand 22 and 20 bonding processing procedures of this needle body, and promote this needle body 20 degree of stability when fixed.
Claims (12)
1. syringe with back-suction is characterized in that: include:
One syringe has the axis of centering on and defines a macropore and a surrounding wall in a little duct, and this syringe surrounding wall has a reverse port of export and an arrival end, and this port of export is in abutting connection with this little duct, and this arrival end is in abutting connection with this macropore;
One needle stand group has a pillar, hollow and runs through a needle stand of this pillar, and a needle body, and this pillar and the fixing of this needle stand are between the large and small duct of this syringe, and this needle body and this needle stand are fixed and pass this syringe;
One locating part, airtight fixing in the macropore of this syringe, and have along this axis direction run through and with the localized perforation of this needle stand group fit;
One push rod can slide against in the macropore of this syringe, and passes this locating part towards this syringe port of export displacement, thereby removes the positioning relation of this locating part and this needle stand group, and this push rod also has around this axis and defines a tube wall of a tube chamber; And
One pumpback device, have a spigot and and reply part, this spigot is enclosed in the end face of this putter face to this locating part, and be used for linking with the needle stand of this needle stand group, this answer part is contained in this tube chamber, and after this spigot unloads this push rod, produce back-suction, and drive that this spigot drives this needle stand and this needle body is moved to this pusher tube intracavity along this pillar.
2. the syringe with back-suction as claimed in claim 1, it is characterized in that, this syringe also has a terrace edge that is formed between this macropore and this little duct, this needle stand group pillar be shorter in length than this needle stand, and have a front end rigion that is resisted against this terrace edge, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
3. the syringe with back-suction as claimed in claim 1, it is characterized in that, this syringe also has around this axis and is formed on a plurality of spacer fins between this large and small duct, aforementioned spacer fin has the ora terminalis towards this macropore, and be formed on a protuberance of this ora terminalis, and this needle stand group pillar be shorter in length than this needle stand, and have the front end rigion of fixing at aforementioned fin protuberance, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
4. as claim 2 or 3 described syringes with back-suction, it is characterized in that, this syringe aperture road has a locating hole section in abutting connection with this macropore, in abutting connection with this locating hole section and aperture greater than a wide section of putting of this locating hole section, in abutting connection with this wide section of putting and this port of export and aperture less than a pin hole section of this wide section of putting, and be formed on this wide section of putting and the intersegmental shoulder of this pin hole, the needle stand of this needle stand group has a front end rigion that is positioned at this locating hole section, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
5. the syringe with back-suction as claimed in claim 1 is characterized in that, the pillar of this needle stand group has and places a front end rigion that is positioned at this little duct of syringe, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
6. the syringe with back-suction as claimed in claim 5, it is characterized in that, this syringe aperture road has a locating hole section in abutting connection with this macropore, in abutting connection with this locating hole section and this port of export and aperture less than a pin hole section of this locating hole section, and be formed on this locating hole section and the intersegmental shoulder of this pin hole, the front end rigion of this needle stand group pillar is resisted against this syringe shoulder, this needle stand have place spacing in this pillar and and this shoulder between be formed with a front end rigion of a start-up space, and be set in this macropore and with the localized rear end section of this locating part perforation fit.
7. as claim 2 or 3 or 6 described syringes with back-suction, it is characterized in that, the needle stand of this needle stand group also has a perforation of the rear end section that is formed on this needle stand, this locating part also have along this axis direction be communicated with this perforation and the aperture greater than a reaming of this perforation, this needle stand perforation is emerging in this reaming.
8. the syringe with back-suction as claimed in claim 7 is characterized in that, this locating part also has and is formed in this reaming and a plurality of folder ribs of spacing this needle stand rear end section.
9. the syringe with back-suction as claimed in claim 8 is characterized in that, aforementioned folder rib has a rearward end that is formed with a closely spaced leading section, spacing this needle stand rear end section with this needle stand respectively, and a card of this needle stand rear end section of block ends rib.
10. the syringe with back-suction as claimed in claim 1, it is characterized in that, this needle stand group has also that external diameter and this needle stand internal diameter are urgent to be cooperated and a endless tube that inner chamber can ccontaining this needle body, this endless tube is contained in this needle stand in advance, after supplying this needle body to place, be filled between this needle stand and this endless tube and this needle body with viscose glue, this needle body and this endless tube and this needle stand are bonded as one.
11. the syringe with back-suction as claimed in claim 1 is characterized in that, this pillar and this needle stand are a kind of tubular structures of hard thin-walled.
12. the syringe with back-suction as claimed in claim 11 is characterized in that, the material of this pillar and this needle stand can be that metal, carbon fiber, engineering plastic are wherein a kind of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101039404A CN100467077C (en) | 2005-09-19 | 2005-09-19 | Syringe with back-suction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101039404A CN100467077C (en) | 2005-09-19 | 2005-09-19 | Syringe with back-suction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1935281A CN1935281A (en) | 2007-03-28 |
| CN100467077C true CN100467077C (en) | 2009-03-11 |
Family
ID=37953134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101039404A Expired - Fee Related CN100467077C (en) | 2005-09-19 | 2005-09-19 | Syringe with back-suction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100467077C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433741B (en) * | 2007-11-12 | 2011-04-27 | 许明正 | Pre-filling type injection syringe capable of drawing back needling body |
-
2005
- 2005-09-19 CN CNB2005101039404A patent/CN100467077C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1935281A (en) | 2007-03-28 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20090311 Termination date: 20091019 |