CN209237058U - A kind of disposable safety self-breaking injector that needle stand is self-locking - Google Patents
A kind of disposable safety self-breaking injector that needle stand is self-locking Download PDFInfo
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- CN209237058U CN209237058U CN201822049545.8U CN201822049545U CN209237058U CN 209237058 U CN209237058 U CN 209237058U CN 201822049545 U CN201822049545 U CN 201822049545U CN 209237058 U CN209237058 U CN 209237058U
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- needle stand
- self
- locking
- syringe
- stop bit
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Abstract
The utility model discloses a kind of disposable safety self-breaking injector that needle stand is self-locking, including syringe, needle stand and core bar, syringe inner hole upper oral part is equipped with an installation hole section, and an annular position-arresting groove is equipped with below installation hole section；The top of stop bit support claw or elastic blade of the needle stand outer wall bottom equipped with inverted several circumferentially spaced settings, each stop bit support claw or elastic blade offsets with the annular position-arresting groove top surface to be connect；The Non-return ring being made of elastic material is provided with below needle stand, the outer wall sealing of Non-return ring is located on syringe inner hole wall；Syringe inner hole lower part is provided with the locking structure being made of upper locking projections and lower locking projections；Stop bit support claw or elastic blade on needle stand can cross upper locking projections after in place by core bar post-tensioning in needle stand and realize upper locking stop bit.The needle stand of the utility model Design Orientation needle point is redesigned, and is realized locking when self-destruction using needle stand, is brought convenience to the installation of core bar, while also can effectively avoid the self-destruction phenomenon in advance of syringe.
Description
Technical field
The present invention relates to disposable safety self-breaking injector, the specially a kind of disposable safety self-breaking that needle stand is self-locking injection
Device.
Background technique
During modern medical service, syringe is a kind of most common utensil of doctor, to avoid the occurrence of the peace such as cross-infection
Full medical treatment hidden danger, existing syringe all use Disposable, self-destroying structure, i.e., just realize self-destruction after use of the syringe, make its nothing
The secondary reuse of method.
Currently, there are many self-destruction syringe type on the market, wherein the self-distruction structure for having a kind of syringe is to pass through
Pulling-pushing rod is realized after manually, syringe tail portion is provided with the engaging slot that upper and lower locking projections are constituted, in core bar head outer wall
Snap fit tabs are provided with, once post-tensioning core bar, which makes snap fit tabs cross locking, protrudes out into engaging slot i.e. realization core bar
Locked, core bar can not move forward and can not also retreat at this time, and needle point completely in be reduced to it is not exposed inside syringe, realize syringe from
It ruins.
The snap lock self-distruction structure of the above core bar and syringe has the disadvantage that 1, is rear-loading type structure because of core bar, on
The setting of lower locking projections will install to core bar and bring difficulty, core bar head must be made to pass through by an assembly set in assembly upper
Lower locking projections position and enter inside syringe；Once 2, pull is excessive during drawing liquid, the card on core bar will lead to
It closes protrusion to cross locking projections and lead to self-destruction in advance, causes the unnecessary loss of medical fluid and syringe.
Summary of the invention
In view of the above-mentioned problems, the present invention devises a kind of disposable safety self-breaking injector that needle stand is self-locking, to positioning
The needle stand of needle point is redesigned, and when core bar post-tensioning drives needle stand to move down, the engaging by needle stand with syringe is realized certainly
Lock, to eliminate the snap-in structure between core bar and syringe, brings convenience to the installation of core bar, while also can be effective
The self-destruction phenomenon in advance of syringe is avoided to occur.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of disposable safety self-breaking injector that needle stand is self-locking, including syringe, needle stand and core bar, the needle stand positioning peace
Mounted in the inner hole front end of syringe, core bar is installed in the inner hole of syringe, it is characterised in that: the syringe inner hole upper oral part is equipped with one
Hole section is installed, an annular position-arresting groove is equipped with below installation hole section；Installation hole section cooperation on the middle and upper part and syringe of the needle stand
Connection, needle stand outer wall bottom are equipped with the stop bit support claw or elasticity blade of inverted several circumferentially spaced settings, each stop bit
The top of support claw or elastic blade offsets with the annular position-arresting groove top surface and connect；It is provided with below needle stand and is made of elastic material
Non-return ring, Non-return ring outer wall sealing is located on syringe inner hole wall；The core bar front end is provided with engaging head, and injection finishes
Being pushed forward for core bar separates Non-return ring with syringe outer wall afterwards, and engaging head is made to engage company with needle stand after the centre bore of Non-return ring
It is connected in one；Syringe inner hole lower part is provided with the locking structure being made of upper locking projections and lower locking projections, upper locking
The internal diameter of protrusion is greater than the internal diameter of lower locking projections；Stop bit support claw or elastic blade on the needle stand are in needle stand by core bar post-tensioning
Locking projections can be crossed after in place and realize locking stop bit.
Further, above-mentioned needle stand bottom is recessed a bottom inclined-plane toward center, and entire needle stand includes that bottom is mutually connected in one
The stop bit support claw or elastic blade is arranged in its outer wall bottom in the outer circle portion and tapered centre portion risen, the outer circle portion, outside
The connection screw thread of needle point seat is arranged in its inner wall for circle portion；Infusion channel up and down is equipped in the tapered centre portion, it is defeated
Liquid channel is sequentially divided into hole section, middle hole section and lower hole section from top to bottom, wherein upper hole section aperture is minimum and mesoporous hole diameter most
Greatly, upper hole section and middle hole section junction are provided with engaging boss, are arranged to tapered slope on the downside of engaging boss.
Further, above-mentioned stop bit support claw or the lateral wall of elastic blade are arranged to downward inclined inclined-plane in the diagonal.
Further, above-mentioned Non-return ring is made of central part and connection bottom；Wherein central part top is equipped with outward flange, outside
Flange is passed through and is slidably connected after hole section with the sealing of middle hole section under needle stand；Central part is provided centrally with centre bore up and down；Institute
The outer wall for stating connection bottom is provided with protrusion and engages sealed connection, or the outer wall of connection bottom with the locating slot on syringe inner hole wall
Directly on syringe inner hole wall locating slot or installation base engage sealed connection；The bottom of bottom inside and needle stand is connected after assembly
There are free gaps between inclined-plane.
Further, the annular groove for increasing its deformation performance is provided on above-mentioned Non-return ring connection bottom.
Further, the thickness of above-mentioned Non-return ring connection bottom from being gradually reduced inside outside.
Further, above-mentioned core bar be sequentially divided into from front to back engaging head, link rod part, interconnecting piece, stop bit seat, easy breakpoint,
Push rod portion and pressing board；The outer diameter of the interconnecting piece is greater than link rod part and forms a block machine in the junction of the two, leads on interconnecting piece
It crosses block tongue and the rubber plug that one length is less than itself is installed, rubber plug is biased to setting above interconnecting piece and makes rubber plug bottom and stop bit after assembly
There are movement clearances between seat, Non-return ring can be pushed to move up when core bar is pushed forward and pushes Non-return ring using block machine and eliminate the work
Dynamic gap, while rubber plug glides along interconnecting piece under Non-return ring reaction force acts and eliminates the movement clearance；The stop bit
The outer diameter of seat is less than the upper locking projections internal diameter and is greater than the lower locking projections internal diameter.
Further, the upper end of above-mentioned stop bit seat, which is equipped with, facilitates the circular arc chamfering that lower locking projections are crossed when its assembly.
Further, it is arranged to inclined-plane, upper locking projections downside between above-mentioned upper locking convex upper side and syringe inner hole wall
It is arranged to right-angle surface between syringe inner hole wall.
Further, above-mentioned lower locking projections are class circular arc protrusion.
Needle stand of the present invention realizes its upper position-arresting on syringe inner hole by each stop bit support claw thereon or elastic blade, together
When by Non-return ring realize that installation of the needle stand in syringe inner hole positions.
In use, when injecting liquid drug finishes, rubber plug encounters Non-return ring and engages head and enter after Non-return ring centre bore
In the middle hole section of needle stand.Continue to press on core bar later, at this time rubber plug forward ends thereof Non-return ring and push Non-return ring central part to move up,
It will gradually eliminate the free gap between Non-return ring connection bottom and needle stand bottom inclined-plane, while rubber plug is under reaction force acts
It glides to eliminating until movement clearance along interconnecting piece and offset with stop bit seat, in the process, Non-return ring central part constantly moves up, will
Make connect bottom constantly deform inside contract and on syringe locating slot or installation base separate, make the pact between Non-return ring and syringe
Beam releases, and continuing above to push away and engaging boss with described and be connected together for head is engaged on core bar, makes needle stand, Non-return ring and core bar shape
It is into a single integrated structure.Pull core bar backward later, drive the needle stand with needle point, Non-return ring and core bar synchronize move back, the process until
Stop bit support claw or elastic blade on needle stand outer wall cross locking projections, and the stop bit support claw or elastic blade resetted at this time struts
It offsets with upper locking projections locked, move up needle stand can not, while the stop bit seat of core bar and lower locking projections are stuck, realize core bar
Lower position-arresting it is locked, finally realize the complete self-destruction of syringe from the easy breakpoint of the core bar core bar that fractures, make the needle stand with needle point
It is reduced in syringe in completely, i.e., cannot move forward can not retreat.
The syringe that the present invention designs, mainly passes through the inversion type stop bit support claw on needle stand outer wall or elastic blade combines
Core bar upper position-arresting seat realizes the locked self-destruction with syringe.Here, needle stand is installed as muzzle-loading structure, from the upper of syringe inner hole
Oral area is installed, and will not be in contact with the locking projections up and down of syringe inner hole tail portion in installation process, there is no can not assemble
The problem of.The stop bit seat on core bar, outer diameter are less than the upper locking projections internal diameter and are greater than in the lower locking projections simultaneously
Diameter in assembly only needs that dress can be completed by lower locking projections in the way of squeezing firmly by the circular arc chamfering of its front end
Match, the installation that can conveniently and efficiently realize each component of syringe by any tool is not needed in entire assembling process, simultaneously
It will not be because of excessive the phenomenon that the leading to self-destruction in advance generation of the post-tensioning of core bar in use.
Detailed description of the invention
Fig. 1, planar structure cross-sectional view of the invention；
The planar structure cross-sectional view of Fig. 2, syringe of the present invention；
The planar structure cross-sectional view of Fig. 3, needle stand of the present invention；
The planar structure cross-sectional view of elastic support claw is arranged in Fig. 4, needle stand of the present invention；
The planar structure cross-sectional view of Fig. 5, Non-return ring of the present invention；
The partial enlarged view that Fig. 6, Non-return ring of the present invention and syringe are connected together；
The partial enlarged view for second of structure that Fig. 7, Non-return ring of the present invention and syringe are connected together；
The partial enlarged view for the third structure that Fig. 8, Non-return ring of the present invention and syringe are connected together；
Second of structural schematic diagram of Fig. 9, Non-return ring of the present invention；
The third structural schematic diagram of Figure 10, Non-return ring of the present invention；
The planar structure schematic diagram of Figure 11, core bar of the present invention；
Figure 12, present invention injection finish the planar structure cross-sectional view of hour hands portions position；
The structural schematic diagram that Figure 13, the engaging head of core bar of the present invention and needle stand are connected together；
The structural schematic diagram that Figure 14, core bar of the present invention drive Non-return ring, needle stand post-tensioning locked；
Figure 15, core bar of the present invention from easy breakpoint fracture after structural schematic diagram.
Specific embodiment
As shown in Figure 1, a kind of disposable safety self-breaking injector that needle stand is self-locking, including syringe 1, needle stand 2 and core bar 3,
2 location and installation of needle stand is installed in the inner hole 11 of syringe 1 in 11 front end of inner hole of syringe 1, core bar 3.
As shown in Fig. 2, 11 upper oral part of syringe inner hole is equipped with an installation hole section 111, installation 111 internal diameter of hole section compares inner hole
11 internal diameter is smaller, installs and is equipped with an annular position-arresting groove 112 below hole section 111.11 lower part of syringe inner hole be provided with by
The internal diameter of the locking structure that upper locking projections 113 and lower locking projections 114 are constituted, the upper locking projections 113 is greater than lower locking
The internal diameter of protrusion 114.It is arranged to inclined-plane 1131 between 113 upside of upper locking projections and syringe inner hole wall, under upper locking projections 113
It is arranged to right-angle surface 1132 between side and syringe inner hole wall.The lower locking projections 114 are class circular arc protrusion.
As shown in figure 3, the installation hole section 111 on the middle and upper part of the needle stand 2 and syringe 1 is cooperatively connected, 2 outer wall bottom of needle stand
Portion is equipped with the stop bit support claw 21 of several inverted circumferentially spaced settings or elastic blade 25, this diagram use stop bit support claw
21 structures, the top of each stop bit support claw 21 offsets with 112 top surface of the annular position-arresting groove and connect, and the structure of elastic blade 25 is such as
Shown in Fig. 4, top offsets with 112 top surface of the annular position-arresting groove and connect, with upper position-arresting support claw 21 or elastic blade 25 in reality
It can arbitrarily be selected in border, the two is in the technical effect and there is no essential differences.
2 bottom of needle stand is recessed a bottom inclined-plane 22 toward center, and entire needle stand 2 includes the outer circle portion that bottom is connected together
The stop bit support claw 21 or elastic blade 25 is arranged in its outer wall bottom in 2a and tapered centre portion 2b, the outer circle portion 2a, outside
The connection screw thread 24 of needle point seat is arranged in its inner wall by circle portion 2a.The infusion being equipped in the tapered centre portion 2b up and down is logical
Road, infusion channel are sequentially divided into hole section 231, middle hole section 232 and lower hole section 233 from top to bottom, wherein upper 231 aperture of hole section is most
Small and middle 232 aperture of hole section is maximum, and upper hole section 231 and 232 junction of middle hole section are provided with engaging boss 234, engages boss
234 downsides are arranged to tapered slope 2341.
In assembly, open entire needle stand 2 from syringe inner hole 11 after stop bit support claw 21 or elastic blade 25 are collapsed
Mouth insertion, the process pass through the installation hole section 111 of entire syringe inner hole 11 until stop bit support claw 21 or elastic blade 25, stop at this time
Position support claw 21 or elastic blade 25 reset and hold top offseting with 112 top surface of the annular position-arresting groove and connect.Here,
Gathering for convenience of upper position-arresting support claw 21 or elastic blade 25 is glided, and 21 lateral wall of stop bit support claw is provided with oblique tilted
Inclined-plane 211, elastic 25 lateral wall of blade is provided with inclined inclined-plane 251 in the diagonal, and effect is gathered in contraction when being pushed with being formed
Fruit.
The Non-return ring 4 being made of highly elastic material is provided with below place needle stand 2, the outer wall sealing of Non-return ring 4 is located in
On 11 wall of syringe inner hole.As shown in figs. 1 and 4, the Non-return ring 4 is made of central part 41 and connection bottom 42.Wherein central part
41 tops are equipped with outward flange 411, and outward flange 411 is passed through and is slidably connected after hole section 233 with the sealing of middle hole section 232 under needle stand.Center
Portion 41 is provided centrally with centre bore 412 up and down.The outer wall of the connection bottom 42 is directly determined on syringe inner hole wall
Position slot 115 engaging be tightly connected, structure as shown in fig. 6, or connection bottom 42 outer wall directly with the peace on syringe inner hole wall
Fill boss 116 engaging be tightly connected, structure as shown in fig. 7, or connection bottom 42 outer wall by setting protrusion 421 and needle
Locating slot 117 on cylinder inner hole wall 1, which engages, to be tightly connected, and structure is as shown in figure 8, here, above protrusion 421 and locating slot
117 position can be interchanged, i.e., protrusion is arranged on syringe inner hole wall, and locating slot setting is connected bottom 42 in Non-return ring
Outer wall on.
There are free gaps 5 between 42 inside of connection bottom and the bottom inclined-plane 22 of needle stand 2 of Non-return ring 4 after assembly.
Here, the connection bottom 42 of the Non-return ring 4 is equipped with annular groove for the self-deformation performance of enhancing Non-return ring 4
422, structure as shown in figure 5, this diagram intermediate annular groove 422 be arranged in connection bottom 42 upper surface, in practice may be used
Annular groove 422 is arranged in the lower surface of connection bottom 42.In addition, the thickness of Non-return ring connection bottom 42 can also be used from outer past
Interior diminishing structure is illustrated as shown in 9 or 10.
As shown in figure 11, the core bar 3 is sequentially divided into engaging head 31, link rod part 32, interconnecting piece 33, stop bit seat from front to back
34, easy breakpoint 35, push rod portion 36 and pressing board 37.Being pushed forward for core bar 3 will make Non-return ring 4 and 1 inner hole wall of syringe point after injection
From, and so that engaging head 31 is connected together after the centre bore 412 of Non-return ring 4 with needle stand 2 and be integrated.
The outer diameter of the interconnecting piece 33 is greater than link rod part 32 and forms a block machine 33a, interconnecting piece 33 in the junction of the two
Upper that the rubber plug 38 that a length is less than itself is installed by block tongue 331, rubber plug 38 is biased to be arranged and make above interconnecting piece 33 after assembly
There are movement clearances 6 between 38 bottom of rubber plug and stop bit seat 34.It can be pushed away when core bar 3 is pushed forward and pushes Non-return ring 4 using block machine 33a
Dynamic Non-return ring 4 moves up and eliminates the free gap 5, at the same rubber plug 38 under 4 reaction force acts of Non-return ring along interconnecting piece 33
It glides and eliminates the movement clearance 6.
The outer diameter of the stop bit seat 34 is less than upper 113 internal diameter of locking projections and is greater than in the lower locking projections 114
Diameter, the upper end of stop bit seat 34, which is equipped with, facilitates the circular arc chamfering 341 that lower locking projections are crossed when its assembly.
Stop bit support claw 21 or elastic blade 25 on the needle stand 2 can cross locking after in place by 3 post-tensioning of core bar in needle stand 2
Fixed protrusion 113 and realize needle stand 2 move up locking stop bit.
In the above structure, needle stand 2 of the present invention realizes it in needle by each stop bit support claw 21 thereon or elastic blade 25
Upper position-arresting on cylinder inner hole 11, while installation positioning of the needle stand 2 in syringe inner hole 11 is realized by Non-return ring 4.
In use, when injecting liquid drug finishes, the block machine 33a of 33 front end of rubber plug 38 and core bar interconnecting piece encounters retaining at this time
Circle 4, engaging head 31 enter in the middle hole section 232 of needle stand 2 after passing through Non-return ring centre bore 412, and structure is as shown in figure 12.
Core bar 3 is continued to press on later, is pushed Non-return ring central part 41 to move up using block machine 33a, will be gradually eliminated retaining
Free gap 5 between circle connection bottom 42 and needle stand bottom inclined-plane 22, while rubber plug 38 is in 4 reaction force acts lower edge of Non-return ring
Interconnecting piece 33 glides to eliminating until movement clearance 6 and offset with stop bit seat 34, in the process, on Non-return ring central part 41 is continuous
Move, will make connect bottom 42 constantly deformation inside contract and on syringe inner hole 11 locating slot 115 or installation base 116 separate,
Make the constraint release between Non-return ring 4 and syringe inner hole 11, and on core bar 3 engage head 31 continue above to push away by with institute on needle stand 2
It states engaging boss 234 to be connected together, so that needle stand 2, Non-return ring 4 and core bar 3 be made to form integral structure, structure such as Figure 13 institute
Show.
Pull core bar 3 backward later, will drive the needle stand 2 with needle point 7, Non-return ring 4 and core bar 3 synchronize move back, the mistake
Journey crosses upper locking projections 113 until the stop bit support claw 21 on 2 outer wall of needle stand, and the stop bit support claw 21 resetted at this time struts and locks
The downside right-angle surface of protrusion 113 offsets locked calmly, move up needle stand 2 can not, while the stop bit seat 34 of core bar 3 is by lower locking projections
114 is stuck, realizes that the lower position-arresting of core bar 2 is locked, and structure is as shown in figure 14, finally fractures from the easy breakpoint 35 of core bar 3 i.e. real
The complete self-destruction of existing syringe, structure is as shown in figure 15, makes the needle stand 2 with needle point 7 is completely interior to be reduced in syringe 1, i.e., cannot
Forward can not retreat.
To sum up, the syringe that the present invention designs mainly passes through inversion type stop bit support claw 21 or elasticity on 2 outer wall of needle stand
Blade 25 combines 3 upper position-arresting seat 34 of core bar to realize the locked self-destruction with syringe 1.Here, needle stand 2 is installed as muzzle-loading structure,
It is installed from the upper oral part of syringe inner hole 11, will not be with the locking projections up and down of 11 tail portion of syringe inner hole in installation process
113, it 114 is in contact, there is no can not assemble.The stop bit seat 34 on core bar 3, outer diameter are less than the upper locking simultaneously
Raised 113 internal diameters and be greater than lower 114 internal diameter of locking projections, the circular arc chamfering 341 using its front end is only needed in assembly
Assembly can be completed by lower locking projections 114 by way of squeezing firmly, do not needed in entire assembling process by any work
Tool can conveniently and efficiently realize the installation of each component of syringe, while will not cause because the post-tensioning of core bar 3 is excessive in use
Occur the phenomenon that self-destruction in advance.
The above is only better embodiment of the invention, not makes any form of restriction to invention, it is all according to
According to technical principle any simple modification, equivalent variations or modification made to the above embodiment of the invention, the present invention is still fallen within
In the range of technical solution.
Claims (10)
1. a kind of disposable safety self-breaking injector that needle stand is self-locking, including syringe, needle stand and core bar, the needle stand location and installation
In the inner hole front end of syringe, core bar is installed in the inner hole of syringe, it is characterised in that: the syringe inner hole upper oral part is equipped with a peace
Hole section is filled, an annular position-arresting groove is equipped with below installation hole section；Installation hole section on the middle and upper part and syringe of the needle stand, which cooperates, to be connected
It connects, needle stand outer wall bottom is equipped with the stop bit support claw of inverted several circumferentially spaced settings or elastic blade, each stop bit support
The top of pawl or elastic blade offsets with the annular position-arresting groove top surface and connect；It is provided with below the needle stand by elastic material structure
At Non-return ring, Non-return ring outer wall sealing is located on syringe inner hole wall；The core bar front end is provided with engaging head, has injected
Being pushed forward for core bar separates Non-return ring with syringe outer wall after finishing, and engages engaging head after the centre bore of Non-return ring with needle stand
It is connected as one；Syringe inner hole lower part is provided with the locking structure being made of upper locking projections and lower locking projections, locking
The internal diameter of fixed protrusion is greater than the internal diameter of lower locking projections；Stop bit support claw or elastic blade on the needle stand is after needle stand is by core bar
It can cross locking projections after drawing in place and realize locking stop bit.
2. a kind of disposable safety self-breaking injector that needle stand is self-locking as described in claim 1, it is characterised in that: the needle stand
Bottom is recessed a bottom inclined-plane toward center, and entire needle stand includes the outer circle portion and tapered centre portion that bottom is connected together, institute
It states outer circle portion and the stop bit support claw or elastic blade is set in its outer wall bottom, needle point seat is arranged in its inner wall in outer circle portion
Connection screw thread；Infusion channel up and down is equipped in the tapered centre portion, infusion channel is sequentially divided into hole from top to bottom
Section, middle hole section and lower hole section, wherein going up hole section aperture minimum and mesoporous hole diameter maximum, upper hole section and middle hole section junction are set
It is equipped with engaging boss, is arranged to tapered slope on the downside of engaging boss.
3. a kind of disposable safety self-breaking injector that needle stand is self-locking as claimed in claim 1 or 2, it is characterised in that: described
Stop bit support claw or the lateral wall of elastic blade are provided with inclined inclined-plane in the diagonal.
4. a kind of disposable safety self-breaking injector that needle stand is self-locking as claimed in claim 2, it is characterised in that: the retaining
Circle is made of central part and connection bottom；Wherein central part top is equipped with outward flange, and outward flange is after hole section under needle stand in
Hole section sealing is slidably connected；Central part is provided centrally with centre bore up and down；The outer wall of the connection bottom is provided with convex
Rise and engage sealed connection with the locating slot on syringe inner hole wall, or connect the outer wall of bottom directly with the positioning on syringe inner hole wall
Slot or installation base engaging are tightly connected；There are free gaps between connection bottom inside and the bottom inclined-plane of needle stand after assembly.
5. a kind of disposable safety self-breaking injector that needle stand is self-locking as claimed in claim 4, it is characterised in that: the retaining
Circle connection is provided with the annular groove for increasing its deformation performance on bottom.
6. a kind of disposable safety self-breaking injector that needle stand is self-locking as described in claim 4 or 5, it is characterised in that: described
The thickness of Non-return ring connection bottom from being gradually reduced inside outside.
7. a kind of disposable safety self-breaking injector that needle stand is self-locking as described in claim 4 or 5, it is characterised in that: described
Core bar is sequentially divided into engaging head, link rod part, interconnecting piece, stop bit seat, easy breakpoint, push rod portion and pressing board from front to back；The connection
The outer diameter in portion is greater than link rod part and forms a block machine in the junction of the two, installs a length by block tongue on interconnecting piece and is less than certainly
The rubber plug of body, rubber plug is biased to setting above interconnecting piece and is made between rubber plug bottom and stop bit seat there are movement clearance after assembly,
Core bar is pushed forward can push Non-return ring to move up and eliminate the free gap when pushing Non-return ring using block machine, while rubber plug is in retaining
It glides along interconnecting piece under circle reaction force acts and eliminates the movement clearance；The outer diameter of the stop bit seat is less than the upper locking
Raised internal diameter and be greater than the lower locking projections internal diameter.
8. a kind of disposable safety self-breaking injector that needle stand is self-locking as claimed in claim 7, it is characterised in that: the stop bit
The upper end of seat, which is equipped with, facilitates the circular arc chamfering that lower locking projections are crossed when its assembly.
9. a kind of disposable safety self-breaking injector that needle stand is self-locking as described in claim 1, it is characterised in that: the locking
Determine to be arranged to inclined-plane between convex upper side and syringe inner hole wall, is arranged to right angle between syringe inner hole wall on the downside of upper locking projections
Face.
10. a kind of disposable safety self-breaking injector that needle stand is self-locking as described in claim 1, it is characterised in that: under described
Locking projections are class circular arc protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049545.8U CN209237058U (en) | 2018-12-07 | 2018-12-07 | A kind of disposable safety self-breaking injector that needle stand is self-locking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049545.8U CN209237058U (en) | 2018-12-07 | 2018-12-07 | A kind of disposable safety self-breaking injector that needle stand is self-locking |
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| Publication Number | Publication Date |
|---|---|
| CN209237058U true CN209237058U (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109350805A (en) * | 2018-12-07 | 2019-02-19 | 河南曙光汇知康生物科技股份有限公司 | A kind of disposable safety self-breaking injector that needle stand is self-locking |
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2018
- 2018-12-07 CN CN201822049545.8U patent/CN209237058U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109350805A (en) * | 2018-12-07 | 2019-02-19 | 河南曙光汇知康生物科技股份有限公司 | A kind of disposable safety self-breaking injector that needle stand is self-locking |
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