CN202777324U - Safe self-destructing type syringe capable of changing needle - Google Patents
Safe self-destructing type syringe capable of changing needle Download PDFInfo
- Publication number
- CN202777324U CN202777324U CN 201220071196 CN201220071196U CN202777324U CN 202777324 U CN202777324 U CN 202777324U CN 201220071196 CN201220071196 CN 201220071196 CN 201220071196 U CN201220071196 U CN 201220071196U CN 202777324 U CN202777324 U CN 202777324U
- Authority
- CN
- China
- Prior art keywords
- needle
- ring
- assembly
- changing
- department
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a safe self-destructing type syringe capable of changing a needle, wherein a replaceable needle assembling part is formed at an upper part of the inner needle seat body, an elastic seal limiting part is formed at a lower part of the needle seat body, the replaceable needle assembling part and the elastic seal limiting part form an integrated type single body structure, the surface of the elastic seal limiting part is provided with an annular buffering interval, an annular seal limiting clamping par is formed on an outer wall of the elastic seal limiting part outside the annular buffering interval, the outer wall of the elastic seal limiting part is provided with a side rotation-proof convex rib, and an end art of a core rod is provided with a locking member which is an asymmetric pullback locking member. When the needle seat is pulled back in the syringe cylindrical body, the injection needle is inclined to one side of the inner wall of the cylindrical body in an approximate 45 degree angle direction in an asymmetric applied force bearing environment, the needle head is locked by the neck part of the cylindrical body when the injection needle completely returns into the cylindrical body, consequently the injection needle and the needle seat cannot be pushed out of the cylindrical body again, and secondary damage caused by a needle head which is pushed out again can be effectively prevented.
Description
Technical field
This utility model relates to the technical field of medical apparatus and instruments, specifically a kind of safety self-destruction type syringe capable of changing needle, particularly its mechanical connecting structure.
Background technology
Documents one, the patent No.: ZL200710047077.4, the applying date: 2007.10.16, notification number: CN101411908, patentee: Shanghai DingJianTang biochemistry Science Co., Ltd, this case discloses " a kind of safe self-destruction type vaccine injector ", comprise cylindrical shell, be provided with core bar in the cylindrical shell, core bar is provided with plug near the place, end, be provided with syringe needle in the cylinder neck of cylindrical shell, the syringe needle place is provided with needle tubing, it is characterized in that: the body of rod sidewall of described core bar end is provided with horizontal cut, vertical breach at horizontal cut and body of rod place, core bar end links, horizontal cut matches with vertical breach, syringe needle is socketed to form by upper needle stand and lower needle stand, lower needle stand inner chamber hollow, lower needle stand becomes tubular structure, lower needle stand is provided with lower needle holder convex tendon with respect to the other end opening part inwall of installing needle holder, the core bar end is provided with the elastomer that is formed with vertical breach UNICOM by horizontal cut, the core bar body of rod herein has certain elasticity, wherein vertically breach is up-narrow and down-wide shape, and horizontal cut outside opening place upper core club shaft outer wall protrudes from lower core club shaft outer wall herein, horizontal cut can be high outside and low outside shape, it is circular-arc that the core bar end becomes, upper needle stand becomes bar shape, upper needle stand outer wall epimere is provided with the reinforcement fin, upper needle stand outer wall hypomere is provided with fixedly bulge loop of needle stand, upper needle stand fixedly the overall diameter of bulge loop greater than upper needle stand outer diameter 0.05mm-0.3mm, described lower needle stand becomes bar shape, its inner chamber hollow, lower needle stand cavity inner wall place is provided with lower needle holder annular fixed groove, lower needle holder annular fixed groove can with upper needle stand fixedly bulge loop match, the internal diameter of lower needle holder annular fixed groove upper chamber is less than the fixing external wall external diameter of the bulge loop upper bar 0.1mm-0.35mm of upper needle stand, the internal diameter of lower needle holder annular fixed groove lower cavity≤upper needle stand is the external wall external diameter of bulge loop lower pole fixedly, lower needle stand is provided with lower needle holder annular convex rib with respect to the place, other end outer wall end of lower needle holder bulge loop, the cylinder neck inwall place of described cylindrical shell is provided with respectively a neck upper limit ring and cylinder neck lower limit ring, distance between cylinder neck upper limit ring and the cylinder neck lower limit ring is 0.3mm-1.5mm, cylinder neck upper limit ring protrudes from inwall 0.1mm-0.6mm between a neck upper limit ring and the cylinder neck lower limit ring, cylinder neck lower limit ring protrudes from inwall 0.02mm-0.25mm between a neck upper limit ring and the cylinder neck lower limit ring, the internal diameter of cylinder lumen between the internal diameter of cylinder neck upper limit ring top cylinder lumen 〉=cylinder neck upper limit ring and the cylinder neck lower limit ring, the internal diameter of the internal diameter of cylinder lumen≤cylinder neck lower limit ring bottom cylinder lumen between cylinder neck upper limit ring and the cylinder neck lower limit ring, the internal diameter of cylinder lumen is less than lower needle holder annular convex rib external diameter 0.1mm-0.5mm between cylinder neck upper limit ring and the cylinder neck lower limit ring, cylinder lumen is provided with the cylindrical shell limit rib with respect to the other end inwall place of cylinder neck, the cylindrical shell limit rib can be linear annular muscle, many the annular muscle that perpendicular muscle consists of,, a perpendicular muscle, the annular muscle that a plurality of raised points consist of, the cylinder inboard wall place of cylindrical shell limit rib bottom is provided with the cylindrical shell inner convex rib, the thickness of the distance between cylindrical shell limit rib and the cylindrical shell inner convex rib 〉=annular stop sheet, the internal diameter at cylindrical shell limit rib place is less than the diameter of annular stop sheet.
The function of utilizing barbed body to realize needle retractable is arranged in the existing safety injector structure, realize safety injection.General barbed body is metalwork or working of plastics.Metalwork need to be processed and cooperate with core bar or assemble, complex manufacturing technology, difficulty is large and stability is not good, has not only increased manufacturing procedure and manufacturing cost, and metalwork itself and assembling process thereof can increase the uncertainties such as hidden danger of product aspect safety and product quality.Structurally still there is defective in existing plastics barb member or incomplete place is arranged, and therefore causes product in use to have potential safety hazard or security breaches.The design of existing plastics back-off spare though can realize the syringe needle function of pulling back, in use, still is in normal trace after syringe needle is pulled back, and syringe needle might be released again causes user by the risk of secondary damage.
In addition, all there are a same difficult problem in existing single needle seat pumpback formula safety self-destructing syringe or safety injector, are exactly how to solve to engage stable between interior needle stand and the cylindrical shell and reach certain intensity to meet stability requirement; Simultaneously, required pulling force can not use with convenient too greatly when the pumpback needle stand.Although rigid fit structure can reach the stable locking effect of interior needle stand and cylinder inboard wall, be difficult to or even can't reach simultaneously the convenient demand of using.The unstability that plastic material itself exists and the characteristic that is subject to variation of ambient temperature can cause the product stability extreme difference of hard fit structure, and quality and precision all are difficult to control in the production process, almost can't realize batch production.
In sum, still need the core bar structure of existing pulling type syringe and the latch-up structure between interior needle stand and the cylindrical shell are further improved, further to improve product safety and stability in use, reach simultaneously the simplification manufacturing procedure, reduce the purpose of manufacturing cost.
Summary of the invention
The purpose of this utility model is to provide a kind of safety self-destruction type syringe capable of changing needle, mutually locks by the elastic buffer snap fastener between needle stand and the injector cartridge in its syringe.The buffer gap at ingenious utilization engaging position and the plasticity of engaging part, perfect locking and the disengaging effect that realizes both.This elastic buffer snap fastener can be arranged at interior needle stand place, also can be arranged at the cylinder inboard wall place; No matter adopt which kind of mode, as long as form corresponding and snap fastener that cooperatively interact at interior needle stand or cylinder inboard wall place simultaneously.The core bar end is provided with the asymmetric locking piece with spring function, and this locking piece can lock by engaging mode mutually with the syringe needle inner chamber.When needle stand was pulled back to the injector cartridge, under the strength effect of Asymmetric Elasticity structure, needle stand can stressed taking advantage of a situation turn to a lateral deviation; Therefore entry needle also can swing to cylinder inboard wall one side to nearly 45 angular direction; After entry needle is return cylindrical shell fully, syringe needle can be locked by the cylindrical shell cervical region, cause thus entry needle and needle stand again to be released outside the cylindrical shell, prevent that effectively syringe needle from being released the secondary damage cause again, realize the safety self-destruct operation of syringe, overcome the shortcoming and defect that exists in the prior art.
To achieve these goals, the technical solution of the utility model is: a kind of safety self-destruction type syringe capable of changing needle, it comprises cylindrical shell, be provided with interior needle stand body in the cylinder neck of the end of described cylindrical shell, interior needle stand body lower end offers the latch well of pulling back, be provided with core bar in the cylindrical shell, core bar is socketed with plug near the place, end, it is characterized in that: the capable of changing needle department of assembly is formed at the top of described interior needle stand body, the elastic packing limiting section is formed at the bottom of needle stand body, capable of changing needle department of assembly and elastic packing limiting section are integral the formula monomer structure, elastic packing limiting section surface offers the ring-type buffer gap, the elastic packing limiting section outer wall place in the outside, ring-type buffer gap forms the spacing holding section of annular seal, elastic packing limiting section outer wall place is provided with anti-sidespin convex tendon, place, capable of changing needle department of assembly forms external spiral stricture of vagina department of assembly, and the end of core bar is provided with locking piece.
In another embodiment of this utility model, a kind of safety self-destruction type syringe capable of changing needle, it comprises cylindrical shell, be provided with interior needle stand body in the cylinder neck of the end of described cylindrical shell, interior needle stand body lower end offers the latch well of pulling back, be provided with core bar in the cylindrical shell, core bar is socketed with plug near the place, end, it is characterized in that: the capable of changing needle department of assembly is formed at the top of described interior needle stand body, the elastic packing limiting section is formed at the bottom of needle stand body, the capable of changing needle department of assembly becomes split type assembly structure with the elastic packing limiting section, elastic packing limiting section surface offers the ring-type buffer gap, and the elastic packing limiting section outer wall place in the outside, ring-type buffer gap forms the spacing holding section of annular seal, and elastic packing limiting section outer wall place is provided with anti-sidespin convex tendon, place, capable of changing needle department of assembly forms external spiral stricture of vagina department of assembly, and the end of core bar is provided with locking piece.
The utility model discloses a kind of safety self-destruction type syringe capable of changing needle, the end of its syringe core rod is provided with the asymmetric locking piece of pulling back with spring function; The design of asymmetry respective outer side edges spring function can be guaranteed that this locking piece can insert the needle stand inner chamber smoothly, and utilize the function of its elastic dilatation, and realization asymmetric holding section, both sides engages and locking with the needle stand inner chamber.When needle stand was pulled back to the injector cartridge, under the force environment of asymmetric active force, needle stand can stressedly turn to a lateral deviation, and therefore entry needle can swing to cylinder inboard wall one side to nearly 45 angular direction; After entry needle was return cylindrical shell fully, syringe needle can be locked by the cylindrical shell cervical region, caused thus entry needle and needle stand again to be released outside the cylindrical shell, prevented from effectively that syringe needle from being released again to cause secondary damage, really realized the safety self-destruct operation of syringe.Needle stand outer wall place forms anti-sidespin convex tendon, prevents that effectively needle stand section from sidespin occuring.When this utility model implementation, the described Asymmetric Elasticity locking piece of pulling back is integral type steel coupler body.This steel coupler body adopts the design principle of asymmetry and the ingenious cooperation of elastomer structure, uses specific angle and size design, so that the steel coupler body possesses the elastic buffer lock function.The pull back snap lock effect of part and needle stand inner chamber of the Asymmetric Elasticity of core bar end is splendid, and the product reasonable integral structure is skillfully constructed, and operation is used simple, and stable working state is easy to apply.Compare existing product design and technology, have significant technical breakthrough in the design, and have outstanding safety and practicality characteristics.
Description of drawings
Fig. 1 is this utility model structural representation.
Fig. 2 is this utility model capable of changing needle holder structure sketch map.
Fig. 3 is this utility model first step user mode figure.
Fig. 4 is this utility model second step user mode figure.
Fig. 5 is this utility model third step user mode figure.
Fig. 6 is this utility model the 4th step user mode figure.
Fig. 7 is this utility model the 5th step user mode figure.
Fig. 8 is this utility model the 6th step user mode figure.
The specific embodiment
With reference to the accompanying drawings, this utility model further is described.
This utility model is a kind of safety self-destruction type syringe capable of changing needle, it comprises cylindrical shell 1, be provided with interior needle stand body 3 in the cylinder neck 2 of the end of described cylindrical shell 1, interior needle stand body 3 lower ends offer the latch well 4 of pulling back, be provided with core bar 5 in the cylindrical shell 1, core bar 5 is socketed with plug 6 near the place, end, it is different from prior art and is: capable of changing needle department of assembly 7 is formed at the top of described interior needle stand body 3, elastic packing limiting section 8 is formed at the bottom of interior needle stand body 3, capable of changing needle department of assembly 7 and elastic packing limiting section 8 are integral the formula monomer structure, elastic packing limiting section 8 surfaces offer ring-type buffer gap 9, the elastic packing limiting section 8 outer wall places in 9 outsides, ring-type buffer gap form the spacing holding section 10 of annular seal, elastic packing limiting section 8 outer wall places are provided with anti-sidespin convex tendon 15,2 ones on the neck of cylinder of cylindrical shell 1 is provided with the oppositely anti-sidespin convex tendon that matches with anti-sidespin convex tendon 15, after both cooperate, can effectively prevent interior needle stand body 3 sidespins, 7 places, capable of changing needle department of assembly form external spiral stricture of vagina department of assembly 11, the end of core bar 5 is provided with locking piece 12, and cylinder neck 2 outer cover of cylindrical shell 1 are connected to sheath 23.
In another embodiment of this utility model, a kind of safety self-destruction type syringe capable of changing needle, it comprises cylindrical shell 1, be provided with interior needle stand body 3 in the cylinder neck 2 of the end of described cylindrical shell 1, interior needle stand body 3 lower ends offer the latch well 4 of pulling back, be provided with core bar 5 in the cylindrical shell 1, core bar 5 is socketed with plug 6 near the place, end, it is characterized in that: capable of changing needle department of assembly 7 is formed at the top of described interior needle stand body 3, elastic packing limiting section 8 is formed at the bottom of interior needle stand body 3, the 8 one-tenth split type assembly structures in capable of changing needle department of assembly 7 and elastic packing limiting section, elastic packing limiting section 8 surfaces offer ring-type buffer gap 9, the elastic packing limiting section 8 outer wall places in 9 outsides, ring-type buffer gap form the spacing holding section 10 of annular seal, elastic packing limiting section 8 outer wall places are provided with anti-sidespin convex tendon 15,2 ones on the neck of cylinder of cylindrical shell 1 is provided with the oppositely anti-sidespin convex tendon that matches with anti-sidespin convex tendon 15, after both cooperate, can effectively prevent interior needle stand body 3 sidespins, 7 places, capable of changing needle department of assembly form external spiral stricture of vagina department of assembly 11, the end of core bar 5 is provided with locking piece 12, and cylinder neck 2 outer cover of cylindrical shell 1 are connected to sheath 23.
In the specific implementation, the rotation of 7 places, described capable of changing needle department of assembly is connected to interchangeable needle stand 13, interchangeable needle stand 13 upper ends are provided with needle tubing 14, both spin by screw thread, 7 tops, described capable of changing needle department of assembly are circular cone shape, its tapering is 6:100, capable of changing needle department of assembly 7 outer walls are provided with external spiral stricture of vagina department of assembly 16, the column cavity 25 of interchangeable needle stand 13 interior formation and needle tubing 14 UNICOMs, interchangeable needle stand 13 interior cavity wall places form screw-internal thread fit section 26, column cavity 25 tops are the Rotary-table shape, the tapering of Rotary-table is 6:100, and described interchangeable needle stand 13 outer walls vertically are provided with at least two reinforcements 26, and capable of changing needle department of assembly 7 and interchangeable needle stand 13 are by spiral assembly structure, cooperate the assembling of 6:100 tapering, can realize good sealing effectiveness.
In the specific implementation, described elastic packing limiting section 8 outer wall places evenly are provided with ring-shaped distributed anti-sidespin convex tendon 15, and the end of anti-sidespin convex tendon 15 is semicircle arcuation or taper.
In the specific implementation, excessive place formation circular step 17 or the ring-type between described capable of changing needle department of assembly 7 and the elastic packing limiting section 8 is domatic.
In the specific implementation, described ring-type buffer gap 9 is ring channel structures, its notch to the height of bottom land is 0.05mm-4mm, the width of ring-type buffer gap 9 is 0.05mm-4mm, the distance on 10 surperficial cambered surface arc tops, the spacing holding section of ring-type buffer gap 9 outside cell walls and annular seal is 0.1mm-6mm, distance between cell wall notch place, 9 outside, ring-type buffer gap and the spacing holding section of annular seal 10 outer walls is 0.1mm-6mm, distance between cell wall bottom land place, 9 outside, ring-type buffer gap and the spacing holding section of annular seal 10 outer walls is 0.1mm-6mm, the surface of the spacing holding section 10 of annular seal becomes arc surfaced, the spacing holding section of annular seal 10 arcing surfaces push up to the distance of cambered surface top edge and push up to the distance of cambered surface lower limb less than arc, and the elastic packing limiting section 8 outer wall places of 10 bottoms, the spacing holding section of described annular seal form annular recess 18.
In the specific implementation, the bottom land of described annular recess 18 and ring-type buffer gap 9 is positioned at the same level face or is higher than the bottom land of ring-type buffer gap 9.
In the specific implementation, the 7 outer wall places, capable of changing needle department of assembly on described circular step 17 tops form annular seal ring assembling groove 19, are socketed with " O " shape O-ring seal 20 in the annular seal ring assembling groove 19.
In the specific implementation, described elastic packing limiting section 8 upper surfaces or lower surface offer ring-type buffer gap 9.
In the specific implementation, described elastic packing limiting section 8 is arranged at place, 7 bottom, capable of changing needle department of assembly or middle section or place, top, and both form integral type monomer structure or split type assembly structure.
In the specific implementation, 10 places, the spacing holding section of described annular seal vertically form some breach or cut off line.
In the specific implementation, the upper end of described core bar 5 forms locking piece pedestal department of assembly 21, the lower end of locking piece pedestal 22 is positioned at locking piece pedestal department of assembly 21, locking piece pedestal 22 places are provided with locking piece 12, locking piece pedestal 22 outer walls form ring-type banking stop 24, described locking piece 12 is the metallic steel hook, it has fine locking effect, inserting can be firmly locked with it behind the latch well 4 of pulling back again, and has the side direction guiding function, realize that interior needle stand body 3 enters the backward lateral deviation of cylinder lumen and turns, depart from normal movement locus, realize the self-destroying function of syringe.
Fig. 3-Fig. 8 is this utility model user mode figure, Fig. 3 is the initial shape figure of syringe, needle stand body is fastened on the cylinder neck inner chamber of cylindrical shell in it, the spacing holding section of the annular seal of interior needle stand body is fastened in the ring-type stopper slot of a neck inwall, just match with the cell wall of ring-type stopper slot in surface, the spacing holding section of annular seal, both fit tightly, and, the spacing holding section of annular seal that is arranged so that of ring-type buffer gap possesses elastic buffer function, under opposition, the spacing holding section of annular seal and ring-type stopper slot to engage sealing effectiveness better, as shown in Figure 4, interchangeable needle stand is rotatably connected in interior needle stand body end, finished the assembling procedure of whole syringe, as shown in Figure 5, pluck the needle stand sheath of interchangeable needle stand outside, prepare start injection, as shown in Figure 6, be syringe imbibition state, as shown in Figure 7, state when pushing away liquid and finish for syringe, at this moment, the locking piece of core bar end has been pushed in the latch well of pulling back, and with it cavity inner wall interlock, as shown in Figure 8, pull back core bar, the point of locking piece (metallic steel hook or plastics barb) is under the pulling force effect, the pull back cavity inner wall of latch well of oblique insertion, both complete interlocks, continue to pull back core bar, because the lower limb of the spacing holding section of annular seal forms guiding radian (being convenient to downward slippage), and the spacing holding section of annular seal possesses again elastic buffer function, so the spacing holding section of annular seal skids off the ring-type stopper slot downwards under the pulling force effect, continue pulling core bar downwards, until whole needle section enters cylinder lumen fully, at this moment, under the effect of locking piece deflection directed force, whole needle section turns to a lateral deviation, so that needle section departs from the proper motion track fully, can't again be assembled into a neck inside, realize the safety self-destruct operation of whole syringe.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that this utility model implementation is confined to above-mentioned these explanations.For this utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (17)
1. safety self-destruction type syringe capable of changing needle, it comprises cylindrical shell (1), be provided with interior needle stand body (3) in the cylinder neck (2) of the end of described cylindrical shell (1), interior needle stand body (3) lower end offers the latch well of pulling back (4), be provided with core bar (5) in the cylindrical shell (1), core bar (5) is socketed with plug (6) near the place, end, it is characterized in that: capable of changing needle department of assembly (7) is formed at the top of described interior needle stand body (3), elastic packing limiting section (8) is formed at the bottom of interior needle stand body (3), capable of changing needle department of assembly (7) and elastic packing limiting section (8) are integral the formula monomer structure, elastic packing limiting section (8) surface offers ring-type buffer gap (9), elastic packing limiting section (8) the outer wall place in the outside, ring-type buffer gap (9) forms the spacing holding section of annular seal (10), elastic packing limiting section (8) outer wall place is provided with anti-sidespin convex tendon (15), capable of changing needle department of assembly (7) locates to form external spiral stricture of vagina department of assembly (11), and the end of core bar (5) is provided with locking piece (12).
2. safety self-destruction type syringe capable of changing needle, it comprises cylindrical shell (1), be provided with interior needle stand body (3) in the cylinder neck (2) of the end of described cylindrical shell (1), interior needle stand body (3) lower end offers the latch well of pulling back (4), be provided with core bar (5) in the cylindrical shell (1), core bar (5) is socketed with plug (6) near the place, end, it is characterized in that: capable of changing needle department of assembly (7) is formed at the top of described interior needle stand body (3), elastic packing limiting section (8) is formed at the bottom of interior needle stand body (3), capable of changing needle department of assembly (7) becomes split type assembly structure with elastic packing limiting section (8), elastic packing limiting section (8) surface offers ring-type buffer gap (9), elastic packing limiting section (8) the outer wall place in the outside, ring-type buffer gap (9) forms the spacing holding section of annular seal (10), elastic packing limiting section (8) outer wall place is provided with anti-sidespin convex tendon (15), capable of changing needle department of assembly (7) locates to form external spiral stricture of vagina department of assembly (11), and the end of core bar (5) is provided with locking piece (12).
3. a kind of safety self-destruction type syringe capable of changing needle according to claim 1 is characterized in that: described capable of changing needle department of assembly (7) locates rotation and is connected to interchangeable needle stand (13), and interchangeable needle stand (13) upper end is provided with needle tubing (14).
4. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: described elastic packing limiting section (8) outer wall place evenly is provided with ring-shaped distributed anti-sidespin convex tendon (15), and the end of anti-sidespin convex tendon (15) is semicircle arcuation or taper.
5. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: top, described capable of changing needle department of assembly (7) is circular cone shape, and its tapering is 6:100, and capable of changing needle department of assembly (7) outer wall is provided with external spiral stricture of vagina department of assembly (16).
6. a kind of safety self-destruction type syringe capable of changing needle according to claim 1 is characterized in that: the excessive place between described capable of changing needle department of assembly (7) and the elastic packing limiting section (8) form circular step (17) or ring-type domatic.
7. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: described ring-type buffer gap (9) is ring channel structures, its notch to the height of bottom land is 0.05mm-4mm, the width of ring-type buffer gap (9) is 0.05mm-4mm, the distance on ring-type buffer gap (9) outside cell wall and the spacing holding section of annular seal (10) surperficial cambered surface arc top is 0.1mm-6mm, distance between cell wall notch place, the outside, ring-type buffer gap (9) and the spacing holding section of annular seal (10) outer wall is 0.1mm-6mm, distance between cell wall bottom land place, the outside, ring-type buffer gap (9) and the spacing holding section of annular seal (10) outer wall is 0.1mm-6mm, the surface of the spacing holding section of annular seal (10) becomes arc surfaced, the spacing holding section of annular seal (10) arcing surface pushes up to the distance of cambered surface top edge and pushes up to the distance of cambered surface lower limb less than arc, and elastic packing limiting section (8) the outer wall place of bottom, the spacing holding section of described annular seal (10) forms annular recess (18).
8. a kind of safety self-destruction type syringe capable of changing needle according to claim 7 is characterized in that: the bottom land of described annular recess (18) and ring-type buffer gap (9) is positioned at the same level face or is higher than the bottom land of ring-type buffer gap (9).
9. a kind of safety self-destruction type syringe capable of changing needle according to claim 6, it is characterized in that: the outer wall place, capable of changing needle department of assembly (7) on described circular step (17) top forms annular seal ring assembling groove (19), is socketed with " O " shape O-ring seal (20) in the annular seal ring assembling groove (19).
10. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: described elastic packing limiting section (8) upper surface or lower surface offer ring-type buffer gap (9).
11. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: described elastic packing limiting section (8) is arranged at place, bottom, capable of changing needle department of assembly (7) or middle section or place, top, and both form integral type monomer structure or split type assembly structure.
12. a kind of safety self-destruction type syringe capable of changing needle according to claim 1 is characterized in that: the spacing holding section of described annular seal (10) is located vertically to form some breach or is cut off line.
13. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: the upper end of described core bar (5) forms locking piece pedestal department of assembly (21), the lower end of locking piece pedestal (22) is positioned at locking piece pedestal department of assembly (21), locking piece pedestal (22) locates to be provided with locking piece (12), and locking piece pedestal (22) outer wall forms ring-type banking stop (24).
14. a kind of safety self-destruction type syringe capable of changing needle according to claim 13 is characterized in that: described locking piece (12) is the metallic steel hook.
15. a kind of safety self-destruction type syringe capable of changing needle according to claim 1, it is characterized in that: form the column cavity (25) with needle tubing (14) UNICOM in the described interchangeable needle stand (13), the interior cavity wall of interchangeable needle stand (13) place forms screw-internal thread fit section (26), column cavity (25) top is the Rotary-table shape, and the tapering of Rotary-table is 6:100.
16. a kind of safety self-destruction type syringe capable of changing needle according to claim 15 is characterized in that: described interchangeable needle stand (13) outer wall vertically is provided with at least two reinforcements (26).
17. a kind of safety self-destruction type syringe capable of changing needle according to claim 1 is characterized in that: cylinder neck (2) outer cover of described cylindrical shell (1) is connected to sheath (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220071196 CN202777324U (en) | 2012-02-29 | 2012-02-29 | Safe self-destructing type syringe capable of changing needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220071196 CN202777324U (en) | 2012-02-29 | 2012-02-29 | Safe self-destructing type syringe capable of changing needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202777324U true CN202777324U (en) | 2013-03-13 |
Family
ID=47804681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220071196 Expired - Lifetime CN202777324U (en) | 2012-02-29 | 2012-02-29 | Safe self-destructing type syringe capable of changing needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202777324U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206188A (en) * | 2015-02-19 | 2017-09-26 | 亚历山大李 | dental syringe with detachable needle stabilizer |
-
2012
- 2012-02-29 CN CN 201220071196 patent/CN202777324U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107206188A (en) * | 2015-02-19 | 2017-09-26 | 亚历山大李 | dental syringe with detachable needle stabilizer |
| CN107206188B (en) * | 2015-02-19 | 2020-10-16 | 亚历山大李 | Dental syringe with detachable needle stabilizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202892570U (en) | A need-pullback-type needle-replaceable safe self-destruction syringe | |
| CN202569090U (en) | Needle-pulling-back safe self-destructive syringe | |
| CN202236663U (en) | Safety self-destruction type syringe capable of changing needle | |
| CN201744031U (en) | Disposable retractable syringe | |
| CN202569091U (en) | Sleeve-type pullback locking assembly for pullback safety self-destruction syringe | |
| CN103285464B (en) | Needle head pull-back type needle-replaceable safe self-destruction syringe | |
| CN203620013U (en) | Inner needle base structure used for pull-back safe self-destruction syringes capable of replacing needles | |
| CN203634589U (en) | Pullback type fixing needle safety auto-disable syringe | |
| CN202777324U (en) | Safe self-destructing type syringe capable of changing needle | |
| CN202161645U (en) | Needle-changeable internal needle base structure for safety self-destruction type syringe | |
| CN203620007U (en) | Needle base structure used for pull-back safe self-destruction syringes with fixed needles | |
| CN202777315U (en) | Replaceable needle inner needle seat structure for safe self-destructing type syringe | |
| CN103372250B (en) | Back-pulling type safety self-locking self-destroying syringe | |
| CN102886089A (en) | Safe self-destroying syringe with changeable needle | |
| CN202376562U (en) | Cylinder structure used for safe self-destruction type syringe | |
| CN103285466B (en) | Needle head pull-back type safe self-destruction syringe | |
| CN202569092U (en) | Needle seat structure used for safety self-destruction syringe | |
| CN202569093U (en) | Inner needle seat structure for replaceable needle for safety self-destruction syringe | |
| CN202777314U (en) | Core rod structure used for pullback type safe self-destructing type syringe | |
| CN102813981A (en) | Barrel structure for safety auto-destruct syringe | |
| CN203408310U (en) | Inner needle seat structure for retractable safety auto-disable syringe | |
| CN203829420U (en) | Syringe needle pull-back type safety self-destruction injection syringe | |
| CN203539808U (en) | Core rod structure for drawing-back safe self-destruction type syringe | |
| CN103285465A (en) | Core rod structure for pullback-type safe self-destructive syringe | |
| CN201791195U (en) | Safe self-destructive type syringe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |