CN107638182A - Fluid delivery system with retractable needles - Google Patents
Fluid delivery system with retractable needles Download PDFInfo
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- CN107638182A CN107638182A CN201710791643.6A CN201710791643A CN107638182A CN 107638182 A CN107638182 A CN 107638182A CN 201710791643 A CN201710791643 A CN 201710791643A CN 107638182 A CN107638182 A CN 107638182A
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- shifting block
- needle
- fluid delivery
- sticking department
- delivery system
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- 239000012530 fluid Substances 0.000 title claims abstract description 96
- 230000004888 barrier function Effects 0.000 claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 20
- 210000002421 cell wall Anatomy 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims description 4
- 208000002925 dental caries Diseases 0.000 claims 1
- 230000000712 assembly Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001467 acupuncture Methods 0.000 description 2
- 238000010241 blood sampling Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention provides a kind of fluid delivery system with retractable needles, belongs to fluid delivery system field, including needle construction, fluid delivery tube and needle guard, and the needle guard includes the cavity for accommodating the syringe needle；The strip guide groove axially extended is offered in the cavity wall of the cavity, the shifting block that can be slided in the strip guide groove is provided with the outer wall of the fluid supplying passage；The guide groove sticking department, the sticking department can accommodate the shifting block, the guide part forms in oriented groove the elastic barrier structure extended on the cell wall of described sticking department one end, and the elastic barrier structure can stop that the shifting block is deviate from from the sticking department after shifting block enters sticking department.The present invention is not only able to prevent used syringe needle from accidentally injuring other people, additionally it is possible to which the effective syringe needle that prevents ensures that the disposable limitation of the present apparatus obtains definite execution by secondary use.
Description
Technical field
The present invention relates to a kind of can input fluid to export the fluid delivery system of fluid into the human body or out of human body,
More particularly to a kind of fluid delivery system with retractable needles.
Background technology
Needle cap is typically carried applied to the conventional needle group that decoction or blood sampling are inputted into human body, its effect is to prevent pin group
Using preceding or using stabbing operator after complete, while buffer action is also played to syringe needle, ensure the syringe needle before use not by
Pollute, and the residue on the syringe needle after will not be traveled in air.
But needle cap has often used the rear situation lost in syringe needle in actual use, the syringe needle of needle cap is lost
It is exposed greatly to improve the risk that operator is pierced by mistake in atmosphere, and decoction, tissue, micro- life are remained on syringe needle
The multiple pollutants such as thing, these pollutants are easily traveled in air in the case of no quarantine measures.In addition, in needle cap not
In the case of loss, operation needle cap recovered again on syringe needle is also breakneck, in fact, in this course by pin
The operator that head is stabbed is not within minority.
For above-mentioned the deficiencies in the prior art, document number is that CN107073242A patent document discloses a kind of sealing
Retractable needles component, it includes：Needle assemblies, the needle assemblies are made up of needle stand with the pin for being fixedly coupled to the needle stand；Can
The actuator arm of elastic deflection, the actuator arm extend from the needle stand and pressed with the actuating formed on the actuator arm
Button；Cylinder, the cylinder has proximally and distally and passage, the passage extend between the near-end and the distal end,
Wherein, the needle assemblies can be slidably arranged in the passage, and the needle assemblies and the actuator arm can be relative
In the cylinder distally position and proximal position axial movement, at the distal position, the pin distad extends over
The distal end of the cylinder, at the proximal position, the pin is completely contained in the cylinder, and wherein, it is described
Cylinder defines aperture, and the aperture extends through the cylinder, when the needle stand is in the distal position, the aperture
The actuating button is engaged, and when the actuator arm is elastically deflected, the actuating button departs from the aperture；Spring,
The spring is arranged in the cylinder, for when the actuator arm is deflected and the actuating button and the aperture depart from
When the needle assemblies are pushed in the proximal position；Barrier film, the barrier film are assemblied in the distal end of the cylinder, its
In, when the pin is in the distal position, the pin extends through the barrier film, and wherein, when the pin is located at institute
When stating proximal position, cylinder described in the diaphragm seal.After use, displacement actuation arm, it can allow under the action of the spring
Needle assemblies are retracted to the near-end of cylinder, and needle assemblies are integrally incorporated in cylinder, exposed aerial so as to avoid syringe needle
Situation；And user avoids operation without being shot back close to syringe needle, syringe needle under elastic force effect in cylinder in operating process
Person is pierced by mistake because of installation needle cap.
As the requirement to sanitary condition is constantly strengthened, existing blood sampling or transfusion, injection needle group are generally disposable
Articles for use.However, in above-mentioned technical proposal after needle assemblies are retracted in cylinder, displacement actuation arm, promotes pin group to sleeve again
Distal end be moved to a certain degree after, actuator arm can again with the aperture engaging on cylinder, so as to which syringe needle is released into sleeve again
Outside so that pin has the risk for stabbing other people, while also provides possibility for reusing for syringe needle.Thus, above-mentioned technical side
Case can not ensure the disposable limitation of syringe needle by definite execution from structure.
The content of the invention
Therefore, the technical problem to be solved in the present invention is to overcome the anti-acupuncture effect of retractable needles component of the prior art
It is poor and the defects of syringe needle is only capable of making a one-time use only can not be ensured, so as to provide a kind of anti-acupuncture effect preferably and syringe needle is contracting
The fluid delivery system with retractable needles that can not be reused after returning.
The technical scheme that present invention takes for this is as follows：
A kind of fluid delivery system with retractable needles, including：
Needle construction, including the syringe needle with needle point；
Fluid delivery tube, can be communicatively affixed with the one end of the needle construction away from the needle point, and with the needle construction
The fluid supplying passage for being available for fluid to circulate is formed together；
Needle guard, including set body, and be formed in the set body, the cavity of the syringe needle, the chamber can be accommodated completely
Body has an opening portion for being available for the syringe needle to stretch out；
The strip guide groove axially extended is offered in the cavity wall of the cavity, on the outer wall of the fluid supplying passage
It is provided with the shifting block that can be slided in the strip guide groove；The guide groove includes the guide part and sticking department interconnected, institute
State sticking department be arranged at the guide groove the remote opening portion one end and the shifting block can be accommodated, the guide part is close to institute
The elastic barrier structure for being formed in oriented groove and being extended on the cell wall of sticking department one end is stated, the elastic barrier structure can be in institute
State and be extruded when shifting block slips into the sticking department by the guide part and the shifting block is entered the sticking department, and into institute
Stop that the shifting block is deviate from from the sticking department when stating the shifting block reverse slide in sticking department.
As a kind of perferred technical scheme, the guide groove is the groove for radially breaking through the cavity wall.
As a kind of perferred technical scheme, minimum slot width of the guide groove at the elastic barrier structure is less than described
Thickness of the shifting block on the guide groove groove width direction.
As a kind of perferred technical scheme, the elastic barrier structure includes being arranged at an at least side channel for the guide groove
Elastic block piece on wall, the elastic block piece form close to the side of the guide groove and slip into the sticking department suitable for the shifting block
Lead-in chamfered, and the lead-in chamfered is from one end away from the sticking department to close to leading corresponding to one end of the sticking department
Groove groove width is gradually reduced.
As a kind of perferred technical scheme, the elastic block piece is elastic projection, and the elastic projection is close to be locked
The blocking surface that the one end in portion is deviate from formed with the stop shifting block from the sticking department.
As a kind of perferred technical scheme, the elastic block piece is elastic arm, and the elastic arm is close to the cell wall
There is gap between side and the cell wall.
As a kind of perferred technical scheme, the needle construction also includes needle stand, and the syringe needle passes through with fluid delivery tube
The needle stand can be communicatively affixed, and the shifting block is arranged on the needle stand.
As a kind of perferred technical scheme, in addition to it is suitable to when the syringe needle is stretched out outside the opening portion to the pin
The relative position of head and the needle guard enters line-locked latch-up structure.
As a kind of perferred technical scheme, in addition to be arranged at the cavity close to described opening portion one end cavity wall with
Bias piece between the shifting block, the bias piece is applied to the shifting block one, and it is moved to the sticking department direction inclined
Pressure.
As a kind of perferred technical scheme, the latch-up structure include can the syringe needle stretch out the opening portion when with
The shifting block coordinates enters line-locked swing arm to the relative position of the syringe needle and the needle guard；One end of the swing arm is be hinged
Hinged end on the needle guard, the other end are the free end that can be rotated around the hinged place of the swing arm and needle guard.
As a kind of perferred technical scheme, formed with the stopper slot that can house the shifting block, the limit in the swing arm
The cell wall for being at least distally from the opening portion of position groove, suitable for when the syringe needle stretches out the opening portion and in the stopper slot
The shifting block offsets.
As a kind of perferred technical scheme, the hinged end of the swing arm is arranged at being opened away from described for the needle guard
One end of oral area, the hinged end are suitable to when the syringe needle stretches out the opening portion with the shifting block away from the opening portion
One end offsets.
As a kind of perferred technical scheme, formed with the contact with the shifting block suitable for the swing arm on the shifting block
The anticreep groove for disposing into and preventing the contact position to depart from the shifting block.
Technical solution of the present invention, have the following advantages that：
1st, in technical scheme provided by the invention, including needle construction, fluid delivery tube and needle guard, the needle construction include tool
There is the syringe needle of needle point；The fluid delivery tube can be communicatively affixed with the one end of the needle construction away from the needle point, and with institute
State needle construction and form the fluid supplying passage for being available for fluid to circulate together；The needle guard includes set body, and is formed at the set
Body is interior, can accommodate the cavity of the syringe needle completely, and the cavity has an opening portion for being available for the syringe needle to stretch out；It is described
The strip guide groove axially extended is offered in the cavity wall of cavity, being provided with the outer wall of the fluid supplying passage can be in institute
State the shifting block slided in strip guide groove；The guide groove includes the guide part and sticking department interconnected, and the sticking department is set
In one end of the remote opening portion of the guide groove and the shifting block can be accommodated, the guide part is close to described sticking department one end
Cell wall on form in oriented groove the elastic barrier structure extended, the elastic barrier structure can be in the shifting block by described
Guide part is extruded when slipping into the sticking department and the shifting block is entered the sticking department, and in the sticking department is entered
Stop that the shifting block is deviate from from the sticking department during shifting block reverse slide.When the fluid delivery system used with
Afterwards, that is, from patient's body abjection after, in order to prevent syringe needle from accidentally injuring other people, shifting block can be stirred along guide groove, make shifting block to
Position away from needle guard cavity hatch portion is moved, and now shifting block can be driven in syringe needle retraction cavity, and syringe needle is played using needle guard
Protective effect is so as to preventing syringe needle from accidentally injuring other people.Shifting block is continued to press on, shifting block, which can extrude elastic barrier structure, enters shifting block
The locking to shifting block is realized in sticking department.Because the elastic extrusion structure is only capable of allowing the shifting block to enter the locking part
Interior, the shifting block is difficult to deviate from the sticking department, and syringe needle is difficult to stretch out again outside the cavity of needle guard after locking part is entered, because
This this fluid delivery system is not only able to prevent used syringe needle from accidentally injuring other people, additionally it is possible to which it is secondary effectively to prevent syringe needle
Use, ensure that the disposable limitation of the present apparatus obtains definite execution.
2nd, in technical scheme provided by the invention, the guide groove is the groove for radially breaking through the cavity wall.Inside and outside insertion
Guide groove for shifting block stretch out needle guard outside provide simplest architecture basics, shifting block can be stretched out needle guard by lengthening shifting block
Outside, therefore said structure can be such that the structure of the present invention simplifies enough, all simpler during manufacture and use and convenient.
3rd, in technical scheme provided by the invention, minimum slot width of the guide groove at the elastic barrier structure is less than institute
State thickness of the shifting block on the guide groove groove width direction.Said structure can make shifting block during sticking department is entered in guide groove
Guide effect under, elastic barrier structure is effectively extruded, make elastic barrier structure produce deformation, ensure elastic barrier
Structure provides enough resistances when sticking department can be left for shifting block.
4th, in technical scheme provided by the invention, the elastic barrier structure includes being arranged at least side of the guide groove
Elastic block piece on cell wall, the elastic block piece form close to the side of the guide groove and slip into the sticking department suitable for the shifting block
Lead-in chamfered, and the lead-in chamfered from away from the sticking department one end to close to the sticking department one end corresponding to
Guide groove groove width is gradually reduced.When shifting block enters line slip to sticking department inside, the lead-in chamfered can guide shifting block to keep off elasticity
Part is extruded, and makes the resistance of shifting block into locking part cumulative, and due to one of the lead-in chamfered certainly away from the sticking department
Hold to close to the guide groove groove width corresponding to one end of the sticking department and be gradually reduced, the guide groove can be caused close to the locking
One end groove width in portion is minimum, so that being difficult into the shifting block in the sticking department by the guide groove from the sticking department
Abjection.Thus, said structure can not only make shifting block for operator provide one it is cumulative by FORCE FEEDBACK, make the locking of shifting block
Journey feel becomes smooth, improves the operability of fluid delivery system, can also effectively prevent from entering in the sticking department
The shifting block is deviate from from the sticking department.
5th, in technical scheme provided by the invention, the elastic block piece is elastic arm, and the elastic arm is close to the cell wall
Side and the cell wall between there is gap.On the one hand the design method of elastic arm is more prone to the deformation of elastic block piece,
When shifting block slides in the guide groove to the sticking department, elastic arm can enable shifting block to the curving with gap
It is enough that sticking department is entered with smaller resistance；On the other hand, when shifting block wants to depart from sticking department, elastic arm can be to away from gap
Side is bent, so that the resistance that shifting block is subject to gradually increases, until the width of whole guide groove is thoroughly blocked, is removed
Otherwise non-demolition elastic arm can not make shifting block deviate from sticking department again.Thus, on the one hand said structure can make fluid defeated
Send the locking of device more convenient and easy to operation, on the other hand can be more appropriate ensure the disposable of fluid delivery system
Performed using limitation.
6th, in technical scheme provided by the invention, the needle construction also includes needle stand, and the syringe needle leads to fluid delivery tube
Crossing the needle stand can be communicatively affixed, and the shifting block is arranged on the needle stand.In view of fluid delivery tube compared to syringe needle one
As it is relatively thick, in order to avoid syringe needle to be mounted directly into caused process complexity on fluid delivery tube, present invention includes
Needle stand, the simpler convenience of installation between syringe needle and fluid delivery tube and reliable, while needle stand can be ensured using needle stand
More suitable architecture basics are provided for the installation carrier of shifting block, shifting block and needle stand need to be only integrally formed.Therefore, on
The assembling of fluid delivery system can be made, using all more convenient by stating structure, while the use of fluid delivery system more may be used
Lean on.
7th, in technical scheme provided by the invention, in addition to it is suitable to when the syringe needle is stretched out outside the opening portion to described
The relative position of syringe needle and the needle guard enters line-locked latch-up structure.When syringe needle is stretched out outside needle guard, the locking device is utilized
The relative position of syringe needle and needle guard can be fixed, medical worker can hold needle guard and syringe needle is pierced into human body, and this measure is big
Improve the convenience of fluid delivery system when in use greatly.
8th, in technical scheme provided by the invention, in addition to it is arranged at cavity wall of the cavity close to described opening portion one end
With the bias piece between the shifting block, the bias piece, which is applied to the shifting block one, makes what it was moved to the sticking department direction
Biasing force.After locking device is opened, under the pressure of the bias piece, shifting block can be made to be moved to the sticking department of guide groove.This
On the one hand it can be that biasing force is provided in syringe needle retraction needle guard to lift, make the use of fluid delivery system more laborsaving；On the other hand,
When guide groove is designed as the situation of blind hole, shifting block is in inside needle guard, and finger can not directly touch shifting block and provide power for shifting block,
The now presence of bias piece can ensure that shifting block is driven in the retraction needle guard of syringe needle active, be promoted without human hand.
9th, in technical scheme provided by the invention, the latch-up structure includes can be when the syringe needle stretches out the opening portion
Coordinate with the shifting block and line-locked swing arm is entered to the relative position of the syringe needle and the needle guard；One end of the swing arm is hinge
The hinged end being connected on the needle guard, the other end are the free end that can be rotated around the hinged place of the swing arm and needle guard.Will locking
After structure design is the form of swing arm, either the opening of latch-up structure and block action can rely on the rotation of swing arm successfully
Complete, this measure provides a kind of operation format being easiest to for latch-up structure, makes the property easy to use of whole fluid delivery system
It is further improved.
10th, in technical scheme provided by the invention, formed with suitable for the swing arm and the shifting block on the shifting block
Insert and prevent the anticreep groove that the contact position departs from the shifting block in contact position.After swing arm abuts with shifting block, swing arm is inserted anti-
In de- groove.Now make if necessary to open swing arm in syringe needle retraction needle guard, it is necessary to overcome resistance of the anticreep groove to swing arm first.Cause
This, this measure can effectively avoid opening of the swing arm by mistake in the case of unnecessary, and then influence fluid delivery system
Normal use, the reliability of the present invention is set further to be lifted.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The required accompanying drawing used is briefly described in embodiment or description of the prior art, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is solid of the fluid delivery system provided in the first embodiment of the present invention under syringe needle stretching state
Figure；
Fig. 2 is the sectional view of the fluid delivery system shown in Fig. 1；
Fig. 3 is the explosive view of the fluid delivery system shown in Fig. 1；
Fig. 4 is solid of the fluid delivery system provided in the first embodiment of the present invention under syringe needle retracted mode
Figure；
Fig. 5 is the sectional view of the fluid delivery system shown in Fig. 4；
Fig. 6 is solid of the fluid delivery system provided in second of embodiment of the present invention under syringe needle stretching state
Figure；
Fig. 7 is the sectional view of the fluid delivery system shown in Fig. 6；
Fig. 8 is the explosive view of the fluid delivery system shown in Fig. 6；
Fig. 9 is solid of the fluid delivery system provided in second of embodiment of the present invention under syringe needle retracted mode
Figure；
Figure 10 is the sectional view of the fluid delivery system shown in Fig. 9；
Figure 11 is that the fluid delivery system provided in the third embodiment of the present invention is vertical under syringe needle stretching state
Body figure；
Figure 12 is the sectional view of the fluid delivery system shown in Figure 11；
Figure 13 is the explosive view of the fluid delivery system shown in Figure 11；
Figure 14 is that the fluid delivery system provided in the third embodiment of the present invention is vertical under syringe needle retracted mode
Body figure；
Figure 15 is the sectional view of the fluid delivery system shown in Figure 14；
Description of reference numerals：
1- needle constructions, 11- syringe needles, 12- needle stands, 2- fluid delivery tubes, 3- needle guards, 31- opening portions, 32- guide grooves, 321-
Elastic barrier structure, 322- sticking departments, 4- shifting blocks, 41- anticreep grooves, 5- swing arms, 51- bullet wings, 6- bias pieces.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than instruction or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It is be combined with each other into conflict can.
Embodiment 1：
It is embodiments of the invention 1 as shown in Fig. 1 to Figure 15.Present embodiments provide a kind of stream with retractable needles
Body conveying device, the fluid delivery system can be used for decoction is taken a blood sample or conveyed into human body out of human body.The device includes
Needle construction 1, fluid delivery tube 2 and needle guard 3, the needle construction 1 include the syringe needle 11 with needle point；The fluid delivery tube 2 with
The described one end of needle construction 1 away from the needle point can be communicatively affixed, and is formed together with the needle construction 1 and be available for fluid to circulate
Fluid supplying passage；The needle guard 3 includes set body, and is formed in the set body, can accommodate the syringe needle 11 completely
Cavity, the cavity has an opening portion 31 for being available for the syringe needle 11 to stretch out；Edge is offered in the cavity wall of the cavity
Axially extending strip guide groove 32, it is provided with and can be slided in the strip guide groove 32 on the outer wall of the fluid supplying passage
Dynamic shifting block 4；The guide groove 32 includes the guide part and sticking department 322 interconnected, and the sticking department 322 is arranged at described
One end of the remote opening portion 31 of guide groove 32 simultaneously can accommodate the shifting block 4, and the guide part is close to the sticking department 322
The elastic barrier structure 321 extended is formed in oriented groove on the cell wall of one end, and the elastic barrier structure 321 can be described
Shifting block 4 is extruded when slipping into the sticking department 322 by the guide part and makes the shifting block 4 into the sticking department 322, and
Stop that the shifting block 4 is deviate from from the sticking department 322 during into 4 reverse slide of shifting block in the sticking department 322.
After the fluid delivery system has used, that is, after patient's body abjection, in order to prevent syringe needle 11 from missing
Hinder other people, shifting block 4 can be stirred along guide groove 32, shifting block 4 is moved to the position away from the cavity hatch portion 31 of needle guard 3, now
Shifting block 4 can be driven in the retraction cavity of syringe needle 11, syringe needle 11 is played a protective role using needle guard 3 so as to prevent syringe needle 11 from accidentally injuring it
Other people.Shifting block 4 is continued to press on, shifting block 4, which can extrude elastic barrier structure 321, makes shifting block 4 enter the interior realization of sticking department 322 to shifting block
4 locking.Because the elastic extrusion structure is only capable of allowing the shifting block 4 to enter in the locking part, the shifting block 4 is difficult to take off
Go out the sticking department 322, syringe needle 11 is difficult to stretch out again outside the cavity of needle guard 3 after locking part is entered, therefore this fluid is defeated
Send device to be not only able to prevent used syringe needle 11 from accidentally injuring other people, additionally it is possible to the effective syringe needle 11 that prevents by secondary use,
Ensure that the disposable limitation of the present apparatus obtains definite execution.
As a kind of embodiment of guide groove 32, the guide groove 32 is the groove for radially breaking through the cavity wall.It is interior
The guide groove 32 of outer insertion is to provide simplest architecture basics outside the stretching needle guard 3 of shifting block 4, will can be dialled by lengthening shifting block 4
Block 4 is stretched out outside needle guard 3, therefore said structure can be such that the structure of the present invention simplifies enough, during manufacture and use all more
Add simple and convenient.
As a kind of embodiment of guide groove 32, minimum of the guide groove 32 at the elastic barrier structure 321
Groove width is less than thickness of the shifting block 4 on the groove width direction of guide groove 32.Said structure can make shifting block 4 into sticking department
During 322 under the guide effect of guide groove 32, elastic barrier structure 321 is effectively extruded, makes elastic barrier knot
Structure 321 produces deformation, ensures to provide enough resistances when elastic construction can leave sticking department 322 for shifting block 4.
As a kind of embodiment of elastic barrier structure 321, the elastic barrier structure 321 includes being arranged at
Elastic block piece at least side cell wall of the guide groove 32, the elastic block piece is formed close to the side of the guide groove 32 to be suitable to
The shifting block 4 slips into the lead-in chamfered of the sticking department 322, and one end of the certainly remote sticking department 322 of the lead-in chamfered
It is gradually reduced to close to the groove width of guide groove 32 corresponding to one end of the sticking department 322.When shifting block 4 is to entering inside sticking department 322
During line slip, the lead-in chamfered can guide shifting block 4 to extrude elastic block piece, shifting block 4 is entered the resistance of locking part gradually
Increase, and due to the lead-in chamfered from one end away from the sticking department 322 to close to corresponding to one end of the sticking department 322
The groove width of guide groove 32 be gradually reduced, can make it that the guide groove 32 is minimum in one end groove width close to the sticking department 322 so that
It is difficult to from the sticking department 322 deviate from by the guide groove 32 into the shifting block 4 in the sticking department 322.Thus, it is above-mentioned
Structure can not only make shifting block 4 for operator provide one it is cumulative by FORCE FEEDBACK, the locking process feel of shifting block 4 is become suitable
It is sliding, the operability of fluid delivery system is improved, can also effectively prevent the shifting block 4 entered in the sticking department 322
Deviate from from the sticking department 322.
As shown in Fig. 6 to Figure 15, as a kind of embodiment of elastic block piece, the elastic block piece is convex for elasticity
Block, the elastic projection are deviate from close to one end of institute's sticking department 322 formed with the stop shifting block 4 from the sticking department 322
Blocking surface.Can be that shifting block 4 departs from the offer resistance of sticking department 322 using blocking surface after shifting block 4 enters sticking department 322, from
And prevent that the syringe needle 11 of used fluid delivery system from being deviate from and can not ensured disposable again.
As shown in Figures 1 to 5, a kind of variant embodiment as elastic block piece, the elastic block piece are elastic arm, institute
State elastic arm has gap between the side of the cell wall and the cell wall.On the one hand the design method of elastic arm makes elasticity
The deformation of block piece is more prone to, and when shifting block 4 is by gap between the elastic block piece and the side wall of guide groove 32, elastic arm can be to
Curving with gap, shifting block 4 is set to enter sticking department 322 with smaller resistance；On the other hand, when shifting block 4 is wanted
When departing from sticking department 322, elastic arm can be bent to the side away from gap, so that the resistance that shifting block 4 receives gradually increases
Greatly, until the width of whole guide groove 32 is thoroughly blocked, except otherwise non-demolition elastic arm can not make shifting block 4 deviate from lock again
Determine portion 322.Thus, on the one hand said structure can make the locking of fluid delivery system more convenient and easy to operation, separately
On the one hand the disposable limitation for ensuring fluid delivery system that can be more appropriate is performed.
In order that the manufacture and use of the present invention are more convenient, needle construction 1 described in the present embodiment also includes needle stand 12, institute
Stating syringe needle 11 can be communicatively affixed by the needle stand 12 with fluid delivery tube 2, and the shifting block 4 is arranged on the needle stand 12.
It is general compared to syringe needle 11 relatively thick in view of fluid delivery tube 2, in order to avoid syringe needle 11 to be mounted directly on fluid delivery tube 2
Caused process complexity, present invention includes needle stand 12, can ensure syringe needle 11 and fluid delivery tube using needle stand 12
The simpler convenience of installation between 2 and reliable, while needle stand 12 also provides more suitable knot for the installation carrier of shifting block 4
Structure basis, shifting block 4 and needle stand 12 need to be only integrally formed.Therefore, said structure can make fluid delivery system assembling,
Using all more convenient, while make the use of fluid delivery system relatively reliable.
A kind of as fluid delivery system improves embodiment, in addition to suitable for stretching out the opening when the syringe needle 11
Line-locked latch-up structure is entered to the relative position of the syringe needle 11 and the needle guard 3 when portion 31 is outer.When syringe needle 11 stretches out needle guard 3
When outer, the relative position of syringe needle 11 and needle guard 3 can be fixed using the locking device, medical worker can hold needle guard
Syringe needle 11 is pierced into human body by 3, and this measure substantially increases the convenience of fluid delivery system when in use.
A kind of as fluid delivery system improves embodiment, in addition to is arranged at the cavity close to the opening portion
Bias piece 6 between the cavity wall of 31 one end and the shifting block 4, the bias piece 6, which is applied to the shifting block 4 one, makes it to described
The biasing force of the direction of sticking department 322 motion.After locking device is opened, under the pressure of the bias piece 6, shifting block 4 can be made
Moved to the sticking department 322 of guide groove 32.On the one hand this measure can be to provide biasing force in the retraction needle guard 3 of syringe needle 11, make fluid defeated
Send the use of device more laborsaving；On the other hand, when guide groove 32 is designed as the situation of blind hole, shifting block 4 is in inside needle guard 3,
Finger can not directly touch shifting block 4 and provide power for shifting block 4, and the now presence of bias piece 6 can ensure that shifting block 4 drives syringe needle
In the retraction needle guard 3 of 11 actives, promoted without human hand.Bias piece 6 described in the present embodiment is specially to be sleeved on needle stand
Spring between 12 and needle guard 3.
As shown in Figures 1 to 10, a kind of embodiment as latch-up structure, the latch-up structure includes can be in institute
State and coordinate to enter the relative position of the syringe needle 11 and the needle guard 3 with the shifting block 4 when syringe needle 11 stretches out the opening portion 31
Line-locked swing arm 51；One end of the swing arm 51 is the hinged end being articulated with the needle guard 3, and the other end is can be around the pendulum
The free end that the hinged place of arm 51 and needle guard 3 rotates.After latch-up structure to be designed as to the form of swing arm 51, either latch-up structure
Opening and block action can rely on swing arm 51 rotation favorably accomplish, this measure provides one kind for latch-up structure and is easiest to
Operation format, the property easy to use of whole fluid delivery system is further improved.
As shown in Figures 1 to 5, a kind of embodiment as swing arm 51, being at least distally from for the stopper slot are described
The cell wall of opening portion 31, suitable for when the syringe needle 11 stretches out the opening portion 31 with the phase of the shifting block 4 in the stopper slot
Support.Acted on during use by the hook of swing arm 51 to prevent the shifting block 4 from being moved to the direction away from shown opening portion 31.
As shown in Fig. 6 to Figure 10, as another variant embodiment of swing arm 51, the described of the swing arm 51 is hinged
End is arranged at one end of the remote opening portion 31 of the needle guard 3, and the hinged end is described suitable for being stretched out in the syringe needle 11
Offseted during opening portion 31 with the one end of the shifting block 4 away from the opening portion 31.In use, withstood by the termination of swing arm 51
Shown shifting block 4 come prevent shown shifting block 4 to away from the opening portion 31 one end move.
As shown in Figure 11 to Figure 15, as a kind of variant embodiment of latch-up structure, the latch-up structure includes setting
Some bullet wings 51 on needle stand 12, are provided with and play the slotted eye that wing 51 is engaged on needle guard 3, and bullet wing 51 stretches into slotted eye during use
Inside come prevent needle stand 12 drive syringe needle 11 to away from opening portion 31 direction move.Need to contract when fluid delivery system use finishes
Back stitching it is first 11 when, fingertip depression bullet wing 51, after bullet wing 51 is departed from slotted eye, needle stand 12 is under the drive of bias piece 6 to away from institute
The direction of opening portion 31 is stated to move.
As shown in figures 3 and 8, embodiment is improved as a kind of of shifting block 4, formed with suitable for described on the shifting block 4
The anticreep groove 41 that the contact position departs from the shifting block 4 is inserted and prevented in swing arm 51 with the contact position of the shifting block 4.Pendulum
After arm 51 abuts with shifting block 4, swing arm 51 is inserted in anticreep groove 41.Now make the retraction needle guard of syringe needle 11 if necessary to open swing arm 51
In 3, it is necessary to resistance of the customer service anticreep groove 41 to swing arm 51 first.Therefore, this measure can effectively avoid swing arm 51 unnecessary
In the case of by mistake opening, and then influence fluid delivery system normal use, make the present invention reliability obtain into one
Step lifting.
Obviously, above-described embodiment is only intended to clearly illustrate example, and is not the restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (13)
1. a kind of fluid delivery system with retractable needles, including：
Needle construction (1), including the syringe needle (11) with needle point；
Fluid delivery tube (2), can be communicatively affixed away from one end of the needle point with the needle construction (1), and with the pin knot
Structure (1) forms the fluid supplying passage for being available for fluid to circulate together；
Needle guard (3), including set body, and be formed in the set body, the cavitys of the syringe needle (11) can be accommodated completely, it is described
Cavity has an opening portion (31) for being available for the syringe needle (11) to stretch out；
It is characterized in that：
The strip guide groove (32) axially extended is offered in the cavity wall of the cavity, on the outer wall of the fluid supplying passage
It is provided with the shifting block (4) that can be slided in the strip guide groove (32)；The guide groove (32) includes the guide part interconnected
With sticking department (322), the sticking department (322) is arranged at one end of the remote opening portion (31) of the guide groove (32) and can
The shifting block (4) is accommodated, the guide part is formed in oriented groove on the cell wall of the sticking department (322) one end and extended
Elastic barrier structure (321), the elastic barrier structure (321) can be slipped into by the guide part described in the shifting block (4)
It is extruded during sticking department (322) and the shifting block (4) is entered the sticking department (322), and is entering the sticking department (322)
In the shifting block (4) reverse slide when stop that the shifting block (4) is deviate from from the sticking department (322).
2. the fluid delivery system according to claim 1 with retractable needles, it is characterised in that：The guide groove (32) is
Radially break through the groove of the cavity wall.
3. the fluid delivery system according to claim 1 or 2 with retractable needles, it is characterised in that：The guide groove
(32) minimum slot width at elastic barrier structure (321) place is less than the shifting block (4) in the guide groove (32) groove width direction
On thickness.
4. the fluid delivery system according to claim 3 with retractable needles, it is characterised in that：The elastic barrier knot
Structure (321) includes the elastic block piece being arranged at least side cell wall of the guide groove (32), and the elastic block piece is close to described
The side of guide groove (32), which is formed, is suitable to the lead-in chamfered that the shifting block (4) slips into the sticking department (322), and the lead-in chamfered
From away from the sticking department (322) one end to close to the sticking department (322) one end corresponding to guide groove (32) groove width by
It is decrescence small.
5. the fluid delivery system according to claim 4 with retractable needles, it is characterised in that：The elastic block piece is
Elastic projection, the elastic projection is close to one end of institute's sticking department (322) formed with stopping the shifting block (4) from the sticking department
(322) blocking surface of abjection in.
6. the fluid delivery system according to claim 4 with retractable needles, it is characterised in that：The elastic block piece is
Elastic arm, the elastic arm have gap between the side of the cell wall and the cell wall.
7. the fluid delivery system with retractable needles according to any one of claim 1-6, it is characterised in that：It is described
Needle construction (1) also includes needle stand (12), and the syringe needle (11) can communicatively be consolidated with fluid delivery tube (2) by the needle stand (12)
Connect, the shifting block (4) is arranged on the needle stand (12).
8. the fluid delivery system with retractable needles according to any one of claim 1-7, it is characterised in that：Also wrap
Include and be suitable to when the syringe needle (11) the stretching opening portion (31) is outer to the relative position of the syringe needle (11) and the needle guard (3)
Put into line-locked latch-up structure.
9. the fluid delivery system according to claim 8 with retractable needles, it is characterised in that：Also include being arranged at institute
State bias piece (6) of the cavity between the cavity wall of the opening portion (31) one end and the shifting block (4), the bias piece (6)
It is applied to the biasing force that the shifting block (4) one makes it be moved to the sticking department (322) direction.
10. the fluid delivery system according to claim 8 with retractable needles, it is characterised in that：The latch-up structure
Including can the syringe needle (11) stretch out opening portion (31) when with the shifting block (4) cooperation to the syringe needle (11) with it is described
The relative position of needle guard (3) enters line-locked swing arm (5)；One end of the swing arm (5) is the hinge being articulated with the needle guard (3)
End is connect, the other end is the free end that can be rotated around the hinged place of the swing arm (5) and needle guard (3).
11. the fluid delivery system according to claim 10 with retractable needles, it is characterised in that：The swing arm (5)
On formed with the stopper slot that can house the shifting block (4), the cell wall for being at least distally from the opening portion (31) of the stopper slot, fit
Offseted when in the syringe needle (11) stretching opening portion (31) with the shifting block (4) in the stopper slot.
12. the fluid delivery system according to claim 10 with retractable needles, it is characterised in that：The swing arm (5)
The hinged end be arranged at the needle guard (3) the remote opening portion (31) one end, the hinged end be suitable to described
Offseted when syringe needle (11) stretches out opening portion (31) with the one end of the shifting block (4) away from the opening portion (31).
13. the fluid delivery system with retractable needles according to any one of claim 10-12, it is characterised in that：
Inserted formed with the contact position suitable for the swing arm (5) and the shifting block (4) on the shifting block (4) and prevent the contact
The anticreep groove (41) that place departs from the shifting block (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710791643.6A CN107638182A (en) | 2017-09-05 | 2017-09-05 | Fluid delivery system with retractable needles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710791643.6A CN107638182A (en) | 2017-09-05 | 2017-09-05 | Fluid delivery system with retractable needles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107638182A true CN107638182A (en) | 2018-01-30 |
Family
ID=61111352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710791643.6A Pending CN107638182A (en) | 2017-09-05 | 2017-09-05 | Fluid delivery system with retractable needles |
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| Country | Link |
|---|---|
| CN (1) | CN107638182A (en) |
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| CN1220612A (en) * | 1996-02-27 | 1999-06-23 | 英杰克蒂姆梅德公司 | Needle tip guard for hypodermic needle |
| US20040147875A1 (en) * | 2001-03-14 | 2004-07-29 | Wallace Bruce Ingram | Non-reusable syringe |
| CN202569071U (en) * | 2012-04-01 | 2012-12-05 | 浙江康德莱医疗器械股份有限公司 | Safe transfusion needle |
| CN202761834U (en) * | 2012-08-27 | 2013-03-06 | 河南曙光健士医疗器械集团股份有限公司 | Outer sleeve type injection needle cover |
| CN204050549U (en) * | 2014-07-24 | 2014-12-31 | 安徽宏宇五洲医用器材有限公司 | A kind of infusion needle protector |
| CN106421982A (en) * | 2016-09-05 | 2017-02-22 | 郑万章 | Safe needle guard and safe blood taking needle cylinder |
| CN106474592A (en) * | 2015-08-27 | 2017-03-08 | 王祖扬 | A kind of needle automatic retracting formula safe vein blood taking needle |
| CN208910274U (en) * | 2017-09-05 | 2019-05-31 | 汪贤宗 | Fluid delivery system with retractable needles |
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2017
- 2017-09-05 CN CN201710791643.6A patent/CN107638182A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220612A (en) * | 1996-02-27 | 1999-06-23 | 英杰克蒂姆梅德公司 | Needle tip guard for hypodermic needle |
| US20040147875A1 (en) * | 2001-03-14 | 2004-07-29 | Wallace Bruce Ingram | Non-reusable syringe |
| CN202569071U (en) * | 2012-04-01 | 2012-12-05 | 浙江康德莱医疗器械股份有限公司 | Safe transfusion needle |
| CN202761834U (en) * | 2012-08-27 | 2013-03-06 | 河南曙光健士医疗器械集团股份有限公司 | Outer sleeve type injection needle cover |
| CN204050549U (en) * | 2014-07-24 | 2014-12-31 | 安徽宏宇五洲医用器材有限公司 | A kind of infusion needle protector |
| CN106474592A (en) * | 2015-08-27 | 2017-03-08 | 王祖扬 | A kind of needle automatic retracting formula safe vein blood taking needle |
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| CN208910274U (en) * | 2017-09-05 | 2019-05-31 | 汪贤宗 | Fluid delivery system with retractable needles |
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Application publication date: 20180130 |