CN104307073A - Sliding bush type needle head protection device and safety syringe - Google Patents
Sliding bush type needle head protection device and safety syringe Download PDFInfo
- Publication number
- CN104307073A CN104307073A CN201410541893.0A CN201410541893A CN104307073A CN 104307073 A CN104307073 A CN 104307073A CN 201410541893 A CN201410541893 A CN 201410541893A CN 104307073 A CN104307073 A CN 104307073A
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- Prior art keywords
- sliding sleeve
- neck ring
- flange
- needle
- projection
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 description 10
- 210000000078 claw Anatomy 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 206010011409 Cross infection Diseases 0.000 description 2
- 102000004877 Insulin Human genes 0.000 description 2
- 108090001061 Insulin Proteins 0.000 description 2
- 206010029803 Nosocomial infection Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229940125396 insulin Drugs 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000217377 Amblema plicata Species 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 206010069803 Injury associated with device Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 206010012601 diabetes mellitus Diseases 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3202—Devices for protection of the needle before use, e.g. caps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Environmental & Geological Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a sliding bush type needle head protection device and a safety syringe using the same. The sliding bush type needle head protection device is simple in structure and low in cost and is capable of preventing accidental thorn damage during use and after use and preventing a used needle head from being repeatedly used. The needle head protection device comprises a neck ring and a sliding bush, wherein the neck ring fixedly sleeves a needle base, is barrel-shaped, is provided with an upper end part (22) and a lower end part (2), can sleeve the neck ring and can slide between a retraction position and an stretching position along the external surface of a boss; the external surface of the neck ring (1) and the internal surface of the lower end part (23) of the sliding bush (2) are respectively provided with latching mechanisms which are matched with each other; when in the stretching position, the sliding bush (2) can be inseparably latched to the neck ring (1).
Description
The divisional application that the application is the applying date is on 09 28th, 2012, application number is 201210379716.8, invention and created name is the patent application of " sleeve type needle guard mechanisms and safety injector ".
Technical field
The present invention relates to a kind of needle guard mechanisms, the syringe needle that especially can prevent the medical apparatus and instruments such as syringe and hemostix from using meets accident the needle guard mechanisms of stabbing, and has the safety needle assembly safety injector in other words of this needle guard mechanisms.
Background technology
In medical practice, the medical apparatus and instruments with sharp-pointed syringe needle uses widely, such as syringe, hemostix etc.These medical apparatus and instruments are not only and are used by professional in medical institutions and process, but also are usually used in the family by layman and process, such as diabetes patient's self administer insulin.
Due to the medical apparatus and instruments such as syringe after a procedure its syringe needle be exposed, be easy to stab related personnel, give collect process cause very large difficulty.This stabbing also can cause bacteria infection.And, when the syringe needle after using is used again, also there is the risk of cross infection.
In order to prevent the generation of accidental puncture and cross infection, there has been proposed the disposable syringe that after using, syringe needle can be retracted.But this syringe construction is complicated, and cost is high.And, the syringe that this syringe needle can be retracted in use complete medicinal liquid to extract after when transferring to another place from a place, syringe needle remains exposure, still there is the risk of accidental puncture.
Summary of the invention
Correspondingly, in order to prevent accidental needle sticks with simple structure, cheap cost and reuse, the invention provides the safety needle assembly of a kind of needle guard mechanisms and this needle guard mechanisms of use.
Needle guard mechanisms of the present invention for comprise needle stand and the syringe needle of pin that is arranged on needle stand is combined, comprise neck ring and sliding sleeve.Described neck ring is the tubular with longitudinal axis, can be enclosed within needle stand in a fixed manner, sliding sleeve is tubular, there is upper end and bottom, can to be enclosed within described neck ring and to slide between retracted position and extended position along described neck ring, at described retracted position, the upper end of described sliding sleeve is nested with on described neck ring, at described extended position, the bottom of described sliding sleeve is nested with on described neck ring, wherein, the inner surface of the outer surface of described neck ring and the bottom of described sliding sleeve forms the latching device cooperatively interacted respectively, when described slide over described extended position time can latch on described neck ring in inseparable mode.
Preferably, described latching device on the outer surface of described neck ring, is formed with one or more boss along the extension of described longitudinal axis direction and on the inner surface of the bottom of described sliding sleeve, is formed with at least one draw-in groove, when described slide over described extended position rotate relative to described neck ring time, boss described at least one can be held in draw-in groove described at least one in inseparable mode.
Further preferably, described latching device is made up of the circle flange on one of described neck ring outer surface and described sliding sleeve inner surface and at least one pair of projection on another, and described a pair projection is not less than the height of described flange along the distance in described longitudinal axis direction.
The outer surface of preferred boss described at least one is formed with the longitudinally guiding groove extended along described longitudinal axis direction, what the region that the inner surface of described sliding sleeve do not form described draw-in groove was formed with that at least one extends between described upper end and described bottom can along the guiding rib slided in described longitudinal axis direction in described longitudinally guiding groove, described guiding rib and described longitudinally guiding groove are constructed to when described sliding sleeve rotates relative to described neck ring, and described guiding rib can depart from from described longitudinally guiding groove.
Or the region not forming described draw-in groove on the inner surface of described sliding sleeve is formed with at least one longitudinally guiding groove extended between described upper end and described bottom, the outer surface of boss described at least one is formed extend along described longitudinal axis direction can along the guiding rib slided in described longitudinal axis direction in described longitudinally guiding groove, described guiding rib and described longitudinally guiding groove are constructed to when described sliding sleeve rotates relative to described neck ring, and described guiding rib can depart from from described longitudinally guiding groove.
Preferably on one of the inner surface of described sliding sleeve and the outer surface of described boss, be formed with protruding point, the inner surface of described sliding sleeve and the outer surface of described boss another on be formed with pit, when described sliding sleeve slides into described extended position, described protruding point can be held in described pit in a detachable fashion.
Certainly, also the protruding point of more protruding than other parts of this guiding rib can be formed with on described guiding rib, the pit darker than these other parts of longitudinally guiding groove is formed in described longitudinally guiding groove, when described sliding sleeve slides into described extended position, described protruding point can be held in described pit in a detachable fashion.Be less than the circumferential gathering sill of described pit in the position of the described pit degree of depth be formed circumferentially, when described slide over described extended position rotate relative to described neck ring time, can slide in described protruding point in described circumferential gathering sill.
According to an optimal technical scheme of the present invention, one of the inner surface of sliding sleeve and the outer surface of boss are formed with protruding point, the inner surface of described sliding sleeve and the outer surface of described boss another on be formed with pit, when sliding sleeve slides into extended position, protruding point can be held in pit in a detachable fashion.
According to an optimal technical scheme of the present invention, the inner surface of the upper end of sliding sleeve is formed with multiple projection, the outer surface of boss is formed with circumferential recess, when described slide over retracted position time, described projection is held in circumferential recess in a detachable fashion.
According to an optimal technical scheme of the present invention, the inner surface of the upper end of sliding sleeve is formed with circumferential recess, and at least one boss forms the projection that oriented outside is protruded, and when sliding over retracted position, projection is held in circumferential recess in a detachable fashion.
According to an optimal technical scheme of the present invention, the inner surface of the upper end of sliding sleeve is formed with the upper flange internally protruded; The upper end of the boss of neck ring reaches outside the outer surface of neck ring along the longitudinal; When sliding sleeve is positioned at retracted position, upper flange is resisted against on the upper surface of the upper end of boss, in case anti-skid sheath falls.
According to an optimal technical scheme of the present invention, the inner surface of the bottom of sliding sleeve is formed with the lower flange internally protruded, and when described sliding sleeve is positioned at extended position, lower flange is bonded on the bottom of neck ring, in case anti-skid sheath is pulled away from neck ring by from extended position.
According to an optimal technical scheme of the present invention, the inner surface of sliding sleeve bottom is formed radial bump, when sliding sleeve is positioned at extended position, forms interference fit by the outer surface of radial bump and neck ring, make sliding sleeve be fixed on extended position in a detachable fashion.
According to an optimal technical scheme of the present invention, radial bump is formed with draw-in groove.
According to an optimal technical scheme of the present invention, the boss of neck ring and the cross sectional shape of draw-in groove are the one in dovetail, T-shaped, rectangle, square, profile of tooth.
According to an optimal technical scheme of the present invention, the circumferential outer edge of draw-in groove is inclined-plane, so that boss enters in draw-in groove.
According to an optimal technical scheme of the present invention, the axis direction along sliding sleeve on the inner surface of sliding sleeve is formed with guiding rib, forms radial bump in the bottom of guiding rib.
According to an optimal technical scheme of the present invention, the boss of guiding rib and neck ring is constructed to guide sliding sleeve along neck ring slip and anti-anti-skid sheath rotates relative to neck ring.
According to an optimal technical scheme of the present invention, also comprise the card cap of the upper end that can be enclosed within sliding sleeve, this card cap comprises: upper surface, and this upper surface is formed with centre bore, and this centre bore can allow pin to extend through and make upper surface can be resisted against the top of sliding sleeve; With the lower end at card cap stretch out formed flange; Wherein, be formed with claw at the outer surface of the upper end of sliding sleeve, this claw can be fastened togather with the flange of card cap, and card cap is connected to the upper end of sliding sleeve.
According to an optimal technical scheme of the present invention, the end wall of neck ring is formed with one or more cavity, the position of this one or more cavity corresponds to one or more boss of neck ring.
According to an optimal technical scheme of the present invention, be formed with on-slip salient point at the inner surface of sliding sleeve and/or the outer surface of neck ring, being used for anti-anti-skid sheath in a detachable fashion moves relative to neck ring.
According to an optimal technical scheme of the present invention, latching device is made up of the circle flange on one of neck ring outer surface and sliding sleeve inner surface and at least one pair of projection on another, this a pair projection distance is along the longitudinal axis not less than the height of flange, when sliding sleeve slides to extended position from retracted position, flange crosses one in described a pair projection, is stuck between described a pair projection.
According to an optimal technical scheme of the present invention, the direction of described a pair projection axis along the longitudinal sees staggered 90 degree.
According to an optimal technical scheme of the present invention, described is wedge shape by the projection of crossing.
According to an optimal technical scheme of the present invention, the inner surface of the upper end of sliding sleeve is formed with the upper flange internally protruded, and when sliding sleeve is positioned at retracted position, upper flange can be resisted against the upper end of neck ring, in case anti-skid sheath falls.
According to an optimal technical scheme of the present invention, the outer surface of neck ring is formed a circle flange, the inner surface of sliding sleeve is also formed with one or more projection below upper flange, and when sliding sleeve is positioned at retracted position, the projection formed below upper flange can against the flange lower on neck ring outer surface.
According to an optimal technical scheme of the present invention, fixed by interference fit between neck ring and needle stand.
According to an optimal technical scheme of the present invention, neck ring inner surface is formed a circle protrusion and hub outer surface are formed one enclose recesses fit and formed fixing.
Safety injector provided by the invention in other words safety needle assembly comprises needle stand and is arranged on the pin on needle stand, and this safety needle assembly comprises needle guard mechanisms of the present invention.
According to an optimal technical scheme of the present invention, safety needle assembly also comprises the helmet for being encapsulated in by pin wherein, and the upper end of described helmet is closed, and underpart opening also can be enclosed within the outer surface of the upper end of sliding sleeve.
According to an optimal technical scheme of the present invention, the outer surface of the upper end of sliding sleeve is formed with external flange outwardly, and the bottom of described helmet can be resisted against on this external flange.
Needle guard mechanisms of the present invention and safety needle assembly; structure is simple, cost is low; can prevent from meeting accident with medical apparatus and instruments such as the syringe of syringe needle and hemostixes and stabbing in use with after use, and be used again after can preventing these medical apparatus and instruments from using.
Accompanying drawing explanation
Fig. 1 be one embodiment of the present invention safety needle assembly before use state time sectional view.
Sectional view when Fig. 2 is safety needle assembly shown in Fig. 1 taking off helmet, sliding sleeve is positioned at retracted position.
Fig. 3 is the sectional view of safety needle assembly shown in Fig. 1 when sliding sleeve is positioned at extended position.
Fig. 4 is the axonometric chart in A-A cross section in reflection Fig. 3.
Fig. 5 is the sectional view of safety needle assembly shown in Fig. 1 when inject state.
Fig. 6 is sectional view when rotating sliding sleeve after safety needle assembly shown in Fig. 1 completes injection.
Fig. 7 is the axonometric chart in B-B cross section in reflection Fig. 6.
Fig. 8 is the axonometric chart of the neck ring of safety needle assembly shown in Fig. 1.
Fig. 9 is the front view of neck ring shown in Fig. 8.
Figure 10 is the top view of neck ring shown in Fig. 9.
Figure 11 is the sectional view intercepted along C-C line in Figure 10.
Figure 12 is the sectional view intercepted along D-D line in Figure 11.
Figure 13 is the axonometric chart of the sliding sleeve of safety needle assembly shown in Fig. 1.
Figure 14 is the front view of sliding sleeve shown in Figure 13.
Figure 15 is the sectional view eliminated after external flange intercepted along E-E line in Figure 14.
Figure 16 is the sectional view eliminated after external flange intercepted along F-F line in Figure 15.
Figure 17 is the sectional view intercepted along G-G line in Figure 15.
Figure 18 is the sectional view intercepted along H-H line in Figure 15.
Figure 19 is the axonometric chart of the syringe of safety needle assembly shown in Fig. 1.
Figure 20 is the front view of syringe shown in Figure 19.
Figure 21 is the top view of syringe shown in Figure 19.
Figure 22 is the sectional view intercepted along I-I line in Figure 21.
Figure 23 is the axonometric chart of the helmet of safety needle assembly shown in Fig. 1.
Figure 24 is the front view of helmet shown in Figure 23.
Figure 25 is the top view of helmet shown in Figure 23.
Figure 26 is the profile intercepted along J-J line in Figure 25.
Figure 27 is the sectional view of safety needle assembly when having injected of another embodiment of the present invention.
Figure 28 is the sectional view of the pull-up sliding sleeve after having injected of safety needle assembly shown in Figure 27.
Figure 29 is pull-up the sectional view after rotating sliding sleeve after having injected of safety needle assembly shown in Figure 27.
Figure 30 is the sectional view intercepted along K-K line in Figure 28.
Figure 31 is the sectional view intercepted along L-L line in Figure 29.
Figure 32 is the axonometric chart of the neck ring of safety needle assembly shown in Figure 27.
Figure 33 is the top view of neck ring shown in Figure 32.
Figure 34 is the axonometric chart of the sliding sleeve of safety needle assembly shown in Figure 27.
Figure 35 is the top view of sliding sleeve shown in Figure 34.
Figure 36 is the sectional view intercepted along M-M line in Figure 35.
Figure 37 is the axonometric chart of the card cap of safety needle assembly shown in Figure 27.
Figure 38 is the sectional view of the cap of card shown in Figure 37.
Figure 39 shows another embodiment of the invention, is wherein stamped helmet.
Figure 40 is view when sliding sleeve is positioned at extended position in Figure 39 illustrated embodiment.
Figure 41 is the longitudinal sectional view of sliding sleeve.
Figure 42 is the sectional view of the position of sliding sleeve shown in Figure 41 after longitudinal axis half-twist.
Figure 43 shows the present invention for the sectional view on the syringe of plastic wrapper.
Figure 44 is another state diagram of the present invention shown in Figure 43.
Figure 45 be the present invention for another kind with the sectional view on the syringe of plastic wrapper.
Figure 46 is the view of the sliding sleeve of the present invention shown in Figure 45 when being positioned at extended position.
Detailed description of the invention
Describe needle guard mechanisms of the present invention with reference to the accompanying drawings in detail and employ the preferred implementation of safety needle assembly of this needle guard mechanisms.
The safety needle assembly of one embodiment of the present invention when Fig. 1 shows state before use.This safety needle assembly comprises needle stand 8, the pin 6 be arranged on needle stand 8, the sliding sleeve 2 that is fixed on the neck ring 1 on needle stand 8 and is slidably enclosed within neck ring 1.Wherein, needle stand 8 and pin 6 constitute syringe needle, and neck ring 1 and sliding sleeve 2 constitute needle guard mechanisms of the present invention.Safety needle assembly shown in Fig. 1 also comprises syringe 4, push rod 5 and is fixed on the plug 3 of push rod 5 upper end.Syringe 4, push rod 5 and plug 3 can be the ingredients of syringe well known in the art, repeat no more in this description.
In this application, needle stand 8 can be the independent parts that can be arranged on syringe 4, also can be integrally formed (as shown in Figure 1) as a part for syringe 4 and syringe 4.
In this application, " on ", D score etc. represents that the term in orientation is the drawing for accompanying drawing place, and nisi orientation.
Safety needle assembly also comprises the helmet 7 for being encapsulated in by pin 6 wherein.Helmet 7 can have various suitable construction known in the art.Such as, refer to Figure 23 ~ Figure 26, the top 71 of helmet 7 is closed, and bottom 74 is open simultaneously.Upper end 72 and bottom 73 between top 71 and bottom 74.Upper end 73 can have certain tapering, its outer surface can be formed with along the vertical direction multiple reinforcements that (namely longitudinal) extends.Bottom 73 can be enclosed within the outer surface of the upper end of sliding sleeve 2.
Contact with the top 71 of helmet to reliably prevent assembling hour hands 6, a step 76 can be formed between upper end 72 and bottom 73, make the inner surface of step 76 against the upper surface 18 (simultaneously see Fig. 8,9,11) of sliding sleeve 2, to form predetermined space between pin 6 and the top 71 of helmet.Alternatively, or on the basis of said structure, outwardly external flange 29 (simultaneously see Figure 13 and 14) can be formed on the outer surface of the upper end of sliding sleeve 2, the edge of the bottom 74 of helmet 7 is resisted against on external flange 29.Be appreciated that at this moment, the inner surface of step 76 can not contact the upper surface of sliding sleeve 2.In addition, as shown in Figs. 13 and 14, can also on the outer surface of sliding sleeve 2, above external flange 29 longitudinally the direction of axis 21 form multiple rib 30, be used for increase and helmet 7 bottom 73 inner surface between frictional force, prevent helmet 7 from rotating or unexpectedly coming off along the longitudinal axis.
Referring to Fig. 8 ~ Figure 12, a kind of embodiment of the neck ring in needle guard mechanisms of the present invention is described.In this example embodiment, neck ring 1 is for having the tubular of longitudinal axis 10.Although in illustrated example, neck ring 1 is roughly cylindrical shape, the present invention is not limited thereto, if be suitable for pin 6 by and can be enclosed within needle stand 8, as long as in other words with the form fit of needle stand 8.
Neck ring 1 can use various structure well known in the art to be fixedly mounted on needle stand 8.Such as, simultaneously see Figure 20 ~ Figure 22, the outer surface of needle stand 8 can be formed with the rib 81 of multiple longitudinal extension, on rib 81, such as, in the upper end of rib 81, form outwardly projection 82.Correspondingly, see Fig. 8 and Figure 11, the rib groove 19 that the direction that the inner surface of neck ring 1 is formed longitudinally axis 10 extends, is formed with pit 20 (simultaneously see Figure 12) in the such as upper end of rib groove 19.When being installed on needle stand 8 by neck ring 1, rib 81 slides until protruding 82 are held in pit 20 along rib groove 19, neck ring 1 can not be rotated relative to needle stand 8, can not relatively longitudinally slide by needle stand 8, thus neck ring 1 is enclosed within needle stand 8 regularly.Neck ring 1 also can be enclosed within needle stand 8 by interference fit, or be stuck in the circle recess formed on needle stand 8 outer surface fixing by the circle protrusion on the inner surface of neck ring 1, described protrusion and recess can be any suitable shapes, preferably inverted cone, thus easily load but difficult drop-off when neck ring is installed on needle stand.
As shown in Fig. 8,9,10,12, the boss 12 that the direction that the outer surface 11 of neck ring 1 is formed multiple longitudinally axis 10 extends.There is shown four symmetrical boss 12, but should be appreciated that, the present invention is not limited thereto.Boss 12 preferably with the integrally moulded formation of outer surface 11 of neck ring.
Boss 12 can extend on the whole longitudinal length of neck ring 1, and its upper end can reach the outside of neck ring 1, and forms upper surface 18; The lower end of boss 12 can be concordant with the lower end of neck ring 1, and forms lower surface 17 (simultaneously see Figure 11).When sliding sleeve 2 is positioned at retracted position, see Fig. 1,2,5, the upper flange 24 (Figure 14 ~ Figure 16) in sliding sleeve 2 is resisted against on upper surface 18, in case anti-skid sheath 2 falls.When sliding sleeve 2 is positioned at extended position, see Fig. 3 and Fig. 6, the lower surface 17 of neck ring can against or engage the lower flange 25 (Figure 14 ~ Figure 16) of sliding sleeve, be pulled away from neck ring 1 with reliably anti-anti-skid sheath 2 by from extended position.
Figure 13 ~ Figure 18 shows a kind of embodiment of the sliding sleeve in needle guard mechanisms of the present invention, wherein, in the sectional view shown in Figure 15 ~ 18, does not show the external flange 29 in Figure 13 and 14.
Sliding sleeve 2 is also tubular, but is not limited to circular cross section, as long as can be enclosed within neck ring 1.Sliding sleeve 2 has longitudinal axis 21.When sliding sleeve 2 is enclosed within neck ring 1, preferably, the longitudinal axis 21 of sliding sleeve 2 overlaps with the longitudinal axis 10 of neck ring.
Sliding sleeve 2 is enclosed within neck ring 1, is more particularly to be enclosed within the boss 12 on the outer surface of neck ring 1, and can slide between retracted position and extended position along the outer surface of boss 12.See Fig. 1,2,5, when sliding sleeve 2 is at retracted position, the upper end 22 of sliding sleeve 2 is nested with on neck ring 1, and at this moment, pin 6 is exposed on the outside of sliding sleeve 2; See Fig. 3 and 6, when sliding sleeve 2 is at extended position, the bottom 23 of sliding sleeve 2 is nested with on neck ring 1, and at this moment, pin 6 is housed in the inside of sliding sleeve 2.
Should be appreciated that, sliding sleeve 2 is divided into upper end 22 and bottom 23 and is only used to describe object easily, upper end 22 substantially corresponds to sliding sleeve 2 and is nested with the part on neck ring 1 when retracted position, and bottom 23 substantially corresponds to sliding sleeve 2 and is nested with the part on neck ring 1 when extended position.
As one preferred embodiment, longitudinal sliding motion guiding mechanism can be formed between the inner surface of sliding sleeve 2 and the outer surface of boss 12.See Figure 15 ~ 17, the guiding rib 26 that the direction that the inner surface of sliding sleeve 2 is formed longitudinally axis 21 between upper flange 24 and lower flange 25 extends.Show two symmetrical guiding ribs 26 in figure, but the present invention is not limited thereto.See Fig. 8,9,10,12, on the outer surface of boss 12, the direction of axis 10 is formed with longitudinally guiding groove 16 along the longitudinal.Guiding rib 26 can in longitudinally guiding groove 16 along the longitudinal the direction of axis 10 or 21 slide, constitute longitudinal sliding motion guiding mechanism, guide sliding sleeve 2 relative to the longitudinal sliding motion of boss 12.
The section shape and size matched of guiding rib 26 and longitudinally guiding groove 16 is set to when sliding sleeve 2 rotates relative to neck ring 1, and guiding rib 26 can depart from from longitudinally guiding groove 16.In other words, guiding rib 26 and longitudinally guiding groove 16 are the joints of separable mode in circumference.
Although the boss of four shown in figure 12 is all formed with longitudinally guiding groove 16, also only can form longitudinally guiding groove 16 on two boss 12 accordingly with guiding rib 26.
As mentioned above, in order to sliding sleeve 2 is temporarily remained on the retracted position shown in Fig. 1,2,5, the inner surface of the upper end 22 of sliding sleeve 2 is formed with one or more protruding 31.As shown in Figure 15,16 and 18, in the illustrated embodiment, the projection 31 that four symmetrical is had.Wherein, two projections 31 are respectively formed at the upper end of two guiding ribs 26.But, the present invention is not limited thereto.With protruding 31 accordingly, be formed with circumferential recess 15 (Fig. 8 and 9) in the upper end of each boss 12 of neck ring 1.When sliding sleeve 2 is positioned at retracted position, each protruding 31 are held in circumferential recess 15 in a detachable fashion, thus sliding sleeve 2 is temporarily remained on retracted position.
So-called " separable mode " namely mutually holds or the parts that are bonded together can be separated from one another under the External Force Acting be applicable to.
In order to sliding sleeve 2 is temporarily remained on the extended position shown in Fig. 3 and 6, see Figure 15 and 16, can on guiding rib 26, preferably, in the lower end of guiding rib 26, form the protruding point 27 of more protruding than other parts of guiding rib 26, such as hemispherical, raindrop shape etc.Correspondingly, in the longitudinally guiding groove 16 of boss 12, Formation Depth is greater than the pit 13 (Fig. 8 and 9) of other parts of longitudinally guiding groove 16.When sliding sleeve 2 is positioned at extended position, protruding point 27 is held in pit 13 in a detachable fashion, thus sliding sleeve 2 is temporarily remained on extended position, also prevent the locked of the sliding sleeve caused due to sliding sleeve unintentional rotation simultaneously.
Although in illustrated embodiment, the longitudinally guiding groove 16 of each boss 12 has a pit 13, each guiding rib 26 has a protruding point 27, but, as long as have at least the protruding point 27 of a pair correspondence and pit 13 namely can realize object of the present invention, although preferably two to above corresponding protruding point 27 and pit 13 circumferentially symmetrical.
Should be appreciated that, not necessarily, therefore, with regard to maintenance extended position, protruding point 27/ pit 13 can be arranged without any relation with longitudinally guiding groove 16 and guiding rib 26 for longitudinally guiding groove 16 and guiding rib 26.
The inner surface of the bottom 23 of sliding sleeve 2 is formed at least one draw-in groove 28, there is shown two symmetrical draw-in grooves 28.Illustrate as Figure 17 and 18 is the clearest, draw-in groove 28 can be roughly barb-like ridge 32 and limits by forming a ring cross-section on the inner surface of sleeve 2.In the illustrated embodiment in which, draw-in groove 28 is surrounded by three ridges 32 and lower flange 25.Draw-in groove 28 is configured to when sliding sleeve 2 slides between retracted position and extended position, and draw-in groove 28 can not interfere the boss 12 of neck ring 1; When sliding sleeve 2 rotates relative to neck ring 1 at extended position, boss 12 is held in draw-in groove 28 in inseparable mode.
So-called " inseparable mode " refers to if by the isolation of components held or be bonded together, very large external force will be needed to realize, even realizing in inseparable process, causing permanent damage to the parts held or be bonded together.
In order to guide sliding sleeve 2 relative to the rotation of boss 12, circumferential sliding guide mechanism can be formed between the inner surface of sliding sleeve 2 and the outer surface of boss 12.As shown in Figure 8 and Figure 9, on boss 12, the position of pit 13 forms circumferential gathering sill 14, and the degree of depth of pit 13 is also greater than circumferential gathering sill 14.Can circumferentially slide by gathering sill 14 in protruding point 27 on the inner surface of sliding sleeve 2, guide sliding sleeve 2 relative to the rotation of boss 12, form circumferential sliding guide mechanism.
The using method with the safety needle assembly of needle guard mechanisms of the present invention is described referring to Fig. 1 ~ Fig. 7.
Figure 1 shows that safety needle assembly of the present invention state before use, push rod 5 is accommodated in syringe 4 completely, and neck ring 1 is fixed on needle stand 8, and sliding sleeve 2 is maintained at retracted position, and helmet 7 is enclosed within sliding sleeve 2 to encapsulate pin 6.
During use, remove helmet 7, be held in the circumferential recess 15 of neck ring boss by the projection 31 on sliding sleeve 2 inner surface, sliding sleeve 2 temporarily can be held in retracted position, to slide interventional operations to avoid sliding sleeve 2.At this moment, pull down push rod 5 and extract medicinal liquid, as shown in Figure 2.
In medical practice, often need by extract medicinal liquid safety needle assembly from a position transfer to another position, or may extract medicinal liquid after not inject immediately.In order to protect pin 6 and prevent accidental puncture after this process; can upwards boost sliding sleeve 2 as shown in Figure 3; be held in the pit 13 of neck ring boss 12 in a detachable fashion by the protruding point 27 on sliding sleeve 2 inner surface; sliding sleeve 2 temporarily can be remained on extended position, thus pin 6 is covered in sliding sleeve 2.When sliding sleeve 2 temporarily remains on extended position, the boss 12 on neck ring 1 is positioned at the outside of the draw-in groove 28 of sliding sleeve 2, see Fig. 4.
Fig. 5 is inject state.When injecting, by suitably exerting oneself, sliding sleeve 2 can be pushed back retracted position, and temporarily remain on retracted position, in case anti-skid sheath 2 may slide and interfere injection in the circumferential recess 15 being held in neck ring boss by the projection 31 on sliding sleeve 2 inner surface.
Fig. 6 is the state after having injected.Sliding sleeve 2 is slided into extended position again, then sliding sleeve 2 is made to rotate relative to neck ring 1, make the boss 12 of neck ring 1 be held in the draw-in groove 28 of sliding sleeve 2 in inseparable mode, see Fig. 7, thus prevent safety needle assembly to be used again while preventing from pin 6 from meeting accident stabbing.
It should be appreciated by those skilled in the art that specific descriptions are above only citing character.Have benefited from instruction of the present invention, those skilled in the art can make various modification, amendment or replacement to above-mentioned specifically described embodiment as the case may be.
Such as, the guiding rib 26 on the inner surface of sliding sleeve 2 and the longitudinally guiding groove 16 on neck ring boss 12 can exchange, and namely guiding rib can be formed on the outer surface of boss 12, and longitudinally guiding groove can be formed on the inner surface of sliding sleeve 2.Similarly, the protruding point 27 on the inner surface of sliding sleeve 2 and the pit 13 on boss 12, and the projection 31 on the inner surface of sliding sleeve 2 and the circumferential recess 14 on boss, also can exchange.
For another example, although employ protruding point 27/ pit 13 and sliding sleeve 2 is temporarily remained on extended position and retracted position by protruding 31/ circumferential recess 14, this structure is not necessarily.Such as, the degree of depth due to longitudinally guiding groove 16 is less than pit 13, so the frictional force between protruding point 27 and longitudinally guiding groove 16 is enough to sliding sleeve 2 temporarily to remain on extended position and retracted position in some cases.Even if there is no the situation of protruding point, the temporary transient maintenance of extended position and retracted position also can realized by the frictional force between design sliding sleeve 2 and boss 12.
Figure 28 ~ 38 show the safety needle assembly of another embodiment of the present invention.Although do not illustrate helmet, the safety needle assembly of present embodiment can have the helmet identical with helmet shown in Figure 23 ~ 25, or is anyly suitable for the helmet being enclosed within sliding sleeve top.Except needle guard mechanisms, the safety needle assembly of present embodiment can have the structure identical with Fig. 1 ~ 27, or any suitable construction known in the art.Below, only the needle guard mechanisms in present embodiment is described.
Figure 27,28,29 is after safety needle assembly completes injection, and pull-up sliding sleeve also rotates the schematic cross sectional views of sliding sleeve.In the needle guard mechanisms of present embodiment, neck ring 100 is fixed on needle stand, and sliding sleeve 200 can slide up and down along neck ring 100, and is positioned at extended position or retracted position.
Figure 32 and 33 shows the neck ring 100 in the safety needle assembly of present embodiment.Neck ring 100 is substantially the cylinder of hollow, such as cylinder, is included in the rib 130 that its inner surface is formed and the boss 110 formed on its outer surface 140.Rib 130 is positioned between the rib 81 (see Figure 20 and 22) in hub outer surface, neck ring can be guided when mounted to be enclosed within needle stand and prevent neck ring from rotating relative to needle stand.Boss 110 can stick in the draw-in groove 223 on sliding sleeve 200 inner surface, see Figure 30 and 31 (hereafter will describe in detail), makes sliding sleeve 200 be fixed on the position shown in Figure 29.Boss 110 can also slide between boss 110 for guiding the guiding rib 220 (hereafter will describe in detail) on sliding sleeve 200 inner surface, and anti-anti-skid sheath 200 rotates relative to neck ring 100.
In a preferred embodiment, chamber 120 can be formed on the end wall 150 of neck ring 100.The position in chamber 120 corresponds to the boss 110 on outer surface 140.The existence in chamber 120 makes boss 110 radially can produce elastic displacement to a certain degree, is conducive to boss 110 and snaps in (see Figure 30 and 31) in the draw-in groove 223 of sliding sleeve 200.
Sliding sleeve 200 in present embodiment is described referring to Figure 34 ~ 36.Sliding sleeve 200 is roughly tubular, such as cylinder.The inner surface of sliding sleeve 200 is formed with guiding rib 220 along the axis direction of sliding sleeve.Guiding rib 220 can take various forms, as long as can slide between the boss 110 on the outer surface 140 of neck ring 100.
Those skilled in the art should understand that, to slide along neck ring 100 with regard to guiding sliding sleeve 200 and with regard to anti-anti-skid sheath 200 rotates relative to neck ring 100, both can be that at least one boss 110 is arranged between two or more guiding rib 220, also can be that at least one guiding rib 220 is arranged between two or more boss 110.
Radial bump 221 is formed at the bottom of guiding rib 220.The distance that radial bump 221 radially-inwardly protrudes is designed to, when sliding sleeve 200 is pulled up (see Figure 28), interfere by radial bump 221 with the outer surface 140 of neck ring 100 or form interference fit, making sliding sleeve 200 be fixed on extended position in a detachable fashion.The size of interference, can select according to factors such as the material of part, weight, or be selected by test, make when radial bump 221 contacts with the outer surface 140 of neck ring 100, sliding sleeve 200 is fixed on the extended position shown in Figure 28; And when pushing away downwards or draw sliding sleeve 200, sliding sleeve 200 can be pulled or push back the retracted position shown in Figure 27, and namely sliding sleeve 200 is fixed on the position be pulled up shown in Figure 28 in a detachable fashion.In the use procedure of safety needle assembly, if need transfer to extract the safety needle assembly (see Fig. 3) of medicinal liquid, then can be fixed on extended position in a detachable fashion by sliding sleeve 200, in transfer process, protect pin not to be touched.
When being pulled upwardly sliding sleeve 200, in order to prevent firmly transition from making sliding sleeve 200 depart from from neck ring 100, as Figure 28,29, shown in 35 and 36, a lower flange 211 protruded towards center can be formed in sliding sleeve 200 lower end.The internal diameter of lower flange 211 is less than the external diameter of the outer surface 140 of neck ring 100, thus lower flange 211 can be resisted against on the end wall 150 of neck ring 100, stops sliding sleeve 200 to be pulled up further.
See Figure 30,31 and 36.A draw-in groove 223 is formed in the bottom of radial bump 221.The boss 110 of neck ring 100 is held in draw-in groove 223 in inseparable mode.The cross sectional shape of boss 110 and draw-in groove 223 can be rectangle, square, profile of tooth, dovetail and T-shaped one, or any structure that can prevent boss 110 from can depart from draw-in groove 223 known in the art.
To rotate relative to neck ring 100 for the ease of sliding sleeve 200 thus boss 110 snapped in draw-in groove 223, as Figure 30,31, shown in 35 and 36, the circumferential outer edge 222 of draw-in groove 223 can be formed as inclined-plane.
See Figure 36, on-slip salient point 240 can be formed on the top of the inner surface of sliding sleeve 200.On-slip salient point 240 can be any shape, includes but not limited to spherical, square, cuboid, cone etc.On-slip salient point 240 can be arranged on guiding rib 220, also can be arranged on the sliding sleeve inner surface outside guiding rib.On-slip salient point can have individual arbitrarily, is distributed in the position of any hope in top of the inner surface of sliding sleeve 200.On-slip salient point on diverse location can have different shapes.On-slip salient point 240 is designed to when sliding sleeve 200 is in the position shown in Figure 27, by interfering or interference fit with the outer surface 140 and/or boss 110 of neck ring 100, engage with the outer surface 140 of neck ring 100 and/or boss 110 in a detachable fashion, thus anti-anti-skid sheath 200 moves relative to neck ring 100, particularly in injection process when needle point down time, can surprisingly slide towards the direction of needle point by anti-anti-skid sheath 200, normally carrying out of interference injection.
It should be appreciated by those skilled in the art that on-slip salient point also can be arranged on neck ring, or be arranged on neck ring and sliding sleeve simultaneously.
See Figure 27.As a preferred embodiment, the upper end of sliding sleeve 200 can link together with card cap 300.The lower end of card cap 300 is formed with outward extending flange 340.Refer to Figure 27,34 and 36 simultaneously, be formed with claw 230 in the upper end of the outer surface 210 of sliding sleeve 200.Claw 230 can as shown be the claw of annular, also can be the discrete claw formed in some positions.The flange 340 of card cap 300 can snap in claw 230, thus card cap 300 and sliding sleeve 200 is linked together.
As shown in figs. 37 and 38, card cap 300 is tubular, and its interior shape can mate with the upper end outer surface of sliding sleeve 200, makes card cap 300 can be enclosed within the upper end outer surface of sliding sleeve 200.The upper surface 330 of card cap 300 extends from the upper end of card cap 300 to center, and forms a centre bore 310.Centre bore 310 can allow the top of pin or needle stand to extend through, and the diameter of centre bore 310 is less than the external diameter of sliding sleeve 200 simultaneously, preferably, is less than the internal diameter of sliding sleeve 200.So upper surface 330 can be resisted against the top of sliding sleeve 200.
Because card cap 300 and sliding sleeve 200 link together, upper surface 330 can be resisted against the top of sliding sleeve 200, so under the state shown in Figure 27, even without above-mentioned on-slip salient point, sliding sleeve 200 also can not slide downward and departing from neck ring 100.
Safety needle assembly shown in Figure 28 ~ 38 has substantially identical mode of operation with the safety needle assembly shown in Fig. 1 ~ 27, repeats no more here.
Figure 39 ~ 46 show another kind of embodiment of the present invention.Wherein identical Reference numeral represents identical parts.As shown in figure 39, neck ring 1 is enclosed within needle stand 8.Fixing between neck ring 1 and needle stand 8 can be undertaken by aforementioned manner.Be be stuck in the circle recess that needle stand 8 outer surface is formed fixing by the circle protrusion 101 on the inner surface of neck ring 1, described protrusion and recess are preferably inverted cone, thus easily load and be not easy to come off when neck ring is installed on needle stand herein.Sliding sleeve 2 is enclosed within outside neck ring 1, can slide up and down.
Neck ring 1 outer surface forms a circle flange 102, at least one pair of projection 201 and 201 ' is formed at the inner surface of sliding sleeve 2 bottom, wherein a pair projection is not less than the height of described flange 102 along the distance in the longitudinal axis direction of sliding sleeve, thus when sliding sleeve is positioned at the extended position shown in Figure 40, described flange 102 crosses one in a pair projection, thus be stuck in this between projection, enable sliding sleeve be locked in extended position.Preferred employing two pairs of projections, as shown in figs. 41 and 42, projection 201 and 201 ' forms a pair, and the direction along sliding sleeve longitudinal axis sees staggered 90 degree, arranges another respectively to projection diametrically opposedly.Conveniently sliding sleeve slides from retracted position to extended position, needs can be made wedge shape by the projection of crossing.Certainly, vice versa, namely also can form at least one pair of projection at neck ring 1 outer surface, forms a circle flange at sliding sleeve inner surface.The relative position of described projection can be selected arbitrarily, as long as sliding sleeve can be latched in extended position.
As shown in figures 39 and 40, the inner surface of the upper end of sliding sleeve is formed with the upper flange 202 internally protruded, and when sliding sleeve is positioned at described retracted position, described upper flange can be resisted against the upper end of described neck ring, falls to prevent described sliding sleeve.This upper flange can be made into integration with sliding sleeve, also can be enclosed within the upper end of sliding sleeve as independent part.
As shown in figure 39, the outer surface of neck ring 1 is formed a circle flange 102, the inner surface of described sliding sleeve is also formed with one or more projection 203 below flange 202 thereon, and a projection described here can refer to the projection of a local, also can refer to a circle projection.When sliding sleeve is positioned at described retracted position, described projection can against flange 102 bottom on described neck ring outer surface, thus axial restraint when enabling sliding sleeve be positioned at retracted position, this is not necessary certainly.Here rising height is less, can be separated thus leave retracted position between sliding sleeve with neck ring.
Other details are identical with embodiment above, repeat no more.
In addition, needle guard mechanisms of the present invention also may be used on existing glass syringe.As shown in Figure 43 ~ 46.A plastic wrapper 400 on cover outside existing glass syringe 600, this plastic wrapper extends along whole syringe length, certain elastic lower block 401 can be had by one between bottom and push rod and be stuck in syringe bottom, or syringe lower end can be fixed on by pressing, as shown in figure 45.The top of plastic wrapper 400 can hold pin thus play the effect of needle stand, as shown in Figure 43 and 44, also can not hold pin, just extend to the position of needle stand, as shown in Figure 45 and 46.Neck ring is enclosed within the top of plastic wrapper in a fixed manner, and sliding sleeve to be enclosed within described neck ring and to slide between retracted position and extended position along described neck ring.
Therefore the needle stand mentioned when describing of the present invention also can refer to the top of playing the plastic wrapper of syringe effect be enclosed within outside syringe.The above-mentioned description for needle stand is also suitable for this plastic wrapper here.This structure especially may be used on the product of pre-fill (filling), as pre-fill insulin syringe.
In this embodiment, helmet not only can be enclosed within the outer surface of sliding sleeve, also can be contained in the inside of plastic wrapper, as shown in figure 45.
Above with reference to accompanying drawing to invention has been concrete description.But, it should be appreciated by those skilled in the art that specific descriptions are above only citing character, for illustration of the object of property, be not used to limit the scope of the invention.Have benefited from instruction of the present invention; those skilled in the art can make various modification, amendment or replacement to above-mentioned specifically described embodiment as the case may be when not exceeding scope, and these modification, amendment or replacement fall into protection scope of the present invention.
Claims (11)
1. a sleeve type needle guard mechanisms, for being combined with syringe needle, syringe needle comprises needle stand and is arranged on the pin on needle stand, and it is characterized in that, described needle guard mechanisms comprises:
Neck ring (1), described neck ring (1), for having the tubular of longitudinal axis (10), can be enclosed within needle stand (8) in a fixed manner,
Sliding sleeve (2), described sliding sleeve is tubular, there are upper end (22) and bottom (23), described neck ring (1) can be enclosed within go up and slide between retracted position and extended position along described neck ring (1), at described retracted position, the upper end (22) of described sliding sleeve is nested with on described neck ring (1), at described extended position, the bottom (23) of described sliding sleeve is nested with on described neck ring (1)
Wherein, the inner surface of the outer surface of described neck ring (1) and the bottom (23) of described sliding sleeve (2) forms the latching device cooperatively interacted respectively, described sliding sleeve (2) is latched on described neck ring (1) in inseparable mode when described extended position
Wherein, described latching device is made up of the circle flange on one of described neck ring outer surface and described sliding sleeve inner surface and at least one pair of projection on another, described a pair projection is not less than the height of described flange along the distance in described longitudinal axis direction, when sliding sleeve slides to extended position from retracted position, described flange crosses one in described a pair projection, is stuck between described a pair projection.
2. needle guard mechanisms as claimed in claim 1, it is characterized in that, described a pair projection sees staggered 90 degree along the direction of described longitudinal axis.
3. needle guard mechanisms as claimed in claim 1, it is characterized in that, described is wedge shape by the projection of crossing.
4. needle guard mechanisms as claimed in claim 1; it is characterized in that; the inner surface of the upper end of described sliding sleeve is formed with the upper flange internally protruded, and when sliding sleeve is positioned at described retracted position, described upper flange can be resisted against the upper end of described neck ring, falls to prevent described sliding sleeve.
5. needle guard mechanisms as claimed in claim 4; it is characterized in that; the outer surface of described neck ring is formed a circle flange; the inner surface of described sliding sleeve is also formed with one or more projection below described upper flange; when sliding sleeve is positioned at described retracted position, the described projection formed below described upper flange can against the flange lower on described neck ring outer surface.
6. needle guard mechanisms as claimed in claim 1, be is characterized in that, fixed between described neck ring and needle stand by interference fit.
7. needle guard mechanisms as claimed in claim 1, is characterized in that, described neck ring inner surface is formed a circle protrusion and described hub outer surface are formed one enclose recesses fit and formed fixing.
8. needle guard mechanisms as claimed in claim 1; it is characterized in that; the inner surface of the bottom of described sliding sleeve (2) is formed with the lower flange (25) internally protruded; when described sliding sleeve is positioned at extended position, described lower flange (25) is bonded on the bottom of described neck ring (1), is pulled away from described neck ring (1) to prevent described sliding sleeve (2) by from described extended position.
9. a safety injector, comprise needle stand and be arranged on the pin on needle stand, it is characterized in that, described safety injector also comprises the needle guard mechanisms according to any one of claim 1 to 8.
10. safety injector as claimed in claim 9, it is characterized in that, described safety injector also comprises the helmet (7) for being encapsulated in by pin wherein, the upper end of described helmet is closed, and underpart opening also can be enclosed within the outer surface of the upper end of described sliding sleeve (2).
11. safety injectors as claimed in claim 10, it is characterized in that, the outer surface of the upper end of described sliding sleeve (2) is formed with external flange (29) outwardly, and the bottom of described helmet (7) can be resisted against on described external flange (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541893.0A CN104307073B (en) | 2012-09-28 | 2012-09-28 | Sliding bush type needle head protection device and safety syringe |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210379716.8A CN102974009B (en) | 2012-09-28 | 2012-09-28 | Pin head protective device and safety pin assembly |
| CN201410541893.0A CN104307073B (en) | 2012-09-28 | 2012-09-28 | Sliding bush type needle head protection device and safety syringe |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210379716.8A Division CN102974009B (en) | 2012-09-28 | 2012-09-28 | Pin head protective device and safety pin assembly |
Publications (2)
| Publication Number | Publication Date |
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| CN104307073A true CN104307073A (en) | 2015-01-28 |
| CN104307073B CN104307073B (en) | 2017-02-22 |
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| CN201410541893.0A Expired - Fee Related CN104307073B (en) | 2012-09-28 | 2012-09-28 | Sliding bush type needle head protection device and safety syringe |
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| CN (1) | CN104307073B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735129A (en) * | 2015-06-15 | 2018-02-23 | 格雷斯海姆雷根斯堡股份有限公司 | Safety device for syringe |
| CN113426157A (en) * | 2021-08-02 | 2021-09-24 | 珠海市供水有限公司 | Intelligent automatic liquid-liquid extraction device and use method thereof |
| WO2021233201A1 (en) * | 2020-05-22 | 2021-11-25 | 普昂(杭州)医疗科技股份有限公司 | Needle protection device and safety syringe |
| CN117180560A (en) * | 2023-08-25 | 2023-12-08 | 上海新耀湃科医疗科技股份有限公司 | Protective cover for prefilled syringe |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4966592A (en) * | 1989-05-05 | 1990-10-30 | Burns Cameron A | Protective sleeve for hypodermic needle |
| US5295975A (en) * | 1992-10-28 | 1994-03-22 | Lockwood Jr Hanford N | Hypodermic needle safety device with sliding outer cover |
| CN2620549Y (en) * | 2003-04-15 | 2004-06-16 | 邱丽丝 | Syringe with safety device |
| CN101797409A (en) * | 2009-02-09 | 2010-08-11 | 王希平 | Safety syringe |
-
2012
- 2012-09-28 CN CN201410541893.0A patent/CN104307073B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107735129A (en) * | 2015-06-15 | 2018-02-23 | 格雷斯海姆雷根斯堡股份有限公司 | Safety device for syringe |
| CN107735129B (en) * | 2015-06-15 | 2020-07-28 | 格雷斯海姆雷根斯堡股份有限公司 | Safety device for syringe |
| WO2021233201A1 (en) * | 2020-05-22 | 2021-11-25 | 普昂(杭州)医疗科技股份有限公司 | Needle protection device and safety syringe |
| CN113426157A (en) * | 2021-08-02 | 2021-09-24 | 珠海市供水有限公司 | Intelligent automatic liquid-liquid extraction device and use method thereof |
| CN117180560A (en) * | 2023-08-25 | 2023-12-08 | 上海新耀湃科医疗科技股份有限公司 | Protective cover for prefilled syringe |
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|---|---|
| CN104307073B (en) | 2017-02-22 |
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