CN1565658A - Self-destruction and blockage type syringe - Google Patents
Self-destruction and blockage type syringe Download PDFInfo
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- CN1565658A CN1565658A CN 03131870 CN03131870A CN1565658A CN 1565658 A CN1565658 A CN 1565658A CN 03131870 CN03131870 CN 03131870 CN 03131870 A CN03131870 A CN 03131870A CN 1565658 A CN1565658 A CN 1565658A
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- head
- core bar
- self
- type syringe
- hole
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Abstract
A self damaging blocked type injector comprising a cone head, a core bar comprsing a head part and a bar body, an outer case, a plunger with a axial center through hole mounted on the core bar head, an elastic block cap on the plunger head. The invention sets a circular boss on the inner wall of the outer case, the out diameter of the elastic block cap low part is bigger than the inner diameter of the circular boss, and an air channel is set between the plunger and the core bar. The invention sets an elastic block cap on the plunger, an air channel between the core bar head and plunger and takes measures of anterior-blocking and rear air feeding. As a result being safe and reliable in its performance, in addition it has simple structure. The invention can avoid the repeat use of the injector needle by heat melting or sticking the injector base with needles on the cone head. The set of the movement limiting member can prevent maloperation. The invention set the block part inside the outer case of the injector and is preferably suitable for the injector with comparatively smaller size.
Description
Technical field
The present invention relates to a kind of syringe.
Background technology
The utility model patent description that China Patent No. is 00267037.2, name is called " obstruction type disposable syringe " discloses a kind of syringe, this syringe has conehead, overcoat, core bar, piston, wherein cone head hole is pre-small post-large stepped bore, the terminal hole wall of cone head hole is provided with annular boss, the head of core bar is in the middle intracavity of piston, piston has axial central through hole, and piston crown is provided with resilient sleeve, and the external diameter of resilient sleeve is greater than the internal diameter of annular boss.Said syringe in use, piston enters the conehead stepped bore through annular boss under core bar promotes, when resilient sleeve touches cascaded surface, injecting liquid drug finishes, this moment, resilient sleeve passed completely through annular boss, as pulled back core bar, and resilient sleeve is subjected to the prevention of annular boss, can't withdraw from, resilient sleeve gets lodged in and reaches the purpose that syringe can't reuse in the cone head hole.Above-mentioned utility model relatively is applicable to the syringe that specification is bigger, and in actual use, find the not exclusively obstruction after injecting of above-mentioned utility model, as carrying out imbibition by force again, still can suck the part medicinal liquid, though this is because resilient sleeve gets lodged in the cone head hole, but in pulling back the core bar process by force, gap between the back bottom surface of core bar head and piston lumen base ring face is more and more littler, when the back bottom surface of core bar head contacts closely with the base ring face of piston lumen, continue the pulling core bar, because of air can't enter in the mantle cavity, gradually form negative pressure in the mantle cavity, and resilient sleeve is not very tight with cooperating of cone head hole, under atmospheric effect, there is the part medicinal liquid to be inhaled into cone head hole and enters in the mantle cavity by the gap between resilient sleeve and conehead hole wall.The block part of above-mentioned obstruction type disposable syringe is in conehead, so the relatively more suitable bigger syringe of specification.
Summary of the invention
The objective of the invention is to propose a kind of self-destruction obstruction type syringe that syringe is promptly wracked after injection is finished.
The core bar that the present invention includes conehead, overcoat, forms by head and shaft, be nested with on the core bar head and have the piston of axial central through hole and be nested with elasticity blocking cap on piston crown, for achieving the above object, the present invention takes to be provided with annular boss on the overcoat front inner wall, the internal diameter of annular boss is provided with air flue less than the external diameter of elasticity blocking cap bottom between the head of piston and core bar.
Hot melt or the bonding needle stand that has syringe needle on the above-mentioned conehead.
Top at above-mentioned elasticity blocking cap is provided with push rod, and push rod can insert in the cone head hole.
Be arranged with two breach in the bottom of above-mentioned elasticity blocking cap.
Above-mentioned core bar is a cross fin core bar, and the rear end of a fin has banking stop therein.
Can be provided with 1～2 axial gap that connects head at the head of core bar, this breach is air flue.
Can respectively be provided with groove on the end face of the head of core bar, side, bottom surface, three grooves connect into air flue.
Can on the head of core bar, be provided with the axial hole that connects head, core bar cervical region on be provided with the radial hole that communicates with the axial hole, this axial hole and radial hole are combined into air flue.
Can respectively be provided with groove on the end face of the inwall of piston lumen, side, bottom surface, three grooves connect into air flue.
Described overcoat front inner wall is provided with the axial diversion groove or is provided with the axial diversion groove on the outer surface of elasticity blocking cap.
The present invention has air flue owing to be provided with the elasticity blocking cap on piston between core bar head and piston, the measure of stifled back air inlet before having taked is so safe and reliable and simple in structure on performance.The present invention takes to have the needle stand hot melt of syringe needle or be bonded on the conehead, prevents the repeated use of syringe needle; The setting of locating part can prevent maloperation.Block part of the present invention is arranged in the overcoat of syringe, the relatively more suitable less syringe of specification.
Description of drawings
Fig. 1 is embodiment 1 configuration diagram;
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is the B-B profile of Fig. 1;
Fig. 4 is a kind of elasticity blocking cap diagrammatic sketch;
Fig. 5 is the core bar head diagrammatic sketch of embodiment 1;
Fig. 6 is that the D of Fig. 5 is to view;
Fig. 7 is the core bar head diagrammatic sketch of embodiment 2;
Fig. 8 is that the E of Fig. 7 is to view;
Fig. 9 is the core bar head configuration diagram of embodiment 3;
Figure 10 is that the F of Fig. 9 is to view;
Figure 11 is the core bar head configuration diagram of embodiment 4;
Figure 12 is that the I of Figure 11 is to view;
Figure 13 is the piston diagrammatic sketch of embodiment 5;
Figure 14 is another kind of elasticity blocking cap diagrammatic sketch;
The configuration diagram of Figure 15 embodiment 6;
Figure 16 is the H-H profile of Figure 15;
Figure 17 is for pulling back the core bar state diagram.
The specific embodiment
See Fig. 1～6; embodiment 1 comprises conehead 1; by head 4-1; the core bar 4 that cervical region 4-3 and shaft 4-2 form; overcoat 5; be nested with on core bar head 4-1 and have the piston 3 of axial central through hole 3-1; and be nested with elasticity blocking cap 2 on piston 3 heads; overcoat 5 front inner wall are provided with annular boss 1-3; the internal diameter of annular boss 1-3 is less than the external diameter of elasticity blocking cap 2 bottoms; be provided with two breach 2-2 in the bottom of elasticity blocking cap 2; make the bottom of elasticity blocking cap 2 can be with spatial size of living in; inwardly draw in or outwards open; core bar 4 promotes elasticity blocking caps 2 its underpart of advancing by the annular boss 1-3 on overcoat 5 front inner wall time and inwardly draws in; after passing through the annular boss 1-3 of overcoat by force; outwards open elasticity blocking cap 2 bottoms; because annular boss 1-3 stops that elasticity blocking cap 2 is trapped in the ante-chamber 1-2.Be provided with an axial gap 4-1-1 who connects head 4-1 by cervical region 4-3 arrival shaft 4-2 end face on the head 4-1 of core bar 4, this breach is air flue.Hot melt or the bonding needle stand 7 that has syringe needle on the conehead 1.The shaft 4-2 of core bar 4 is a cross fin core bar, the rear end of a fin has banking stop 8 therein, the maloperation that prevents to need to twitch core 4 bars in assembling or injection set-up procedure and cause core bar 4 to shift the end onto takes place, junction at fin and banking stop 8 is provided with breach 4-2-1, be convenient to banking stop 8 after finishing injection preparation or in injection process with banking stop 8 opisthotonos or fracture.
When core bar 4 is pushed ahead, the head 4-1 end face of core bar 4 contacts with the front of piston 3 lumens, the breach of core bar 4 is blocked by piston 3, core bar 2 is released liquid medicine, piston 3 is in progradation, last medicinal liquid can enter in the hole of conehead 1 by the axial diversion groove 2-1 on the outer surface of elasticity blocking cap 2, to guarantee the seriality of medicinal liquid.Be provided with push rod 2-3 at the top of elasticity blocking cap 2, push rod 2-3 can insert in the cone head hole 1-1, to reduce medicinal liquid residual flow amount.
When core bar 4 on earth the time, elasticity blocking cap 2 is blocked cone head hole.As elasticity blocking cap 2 and cooperating of cone head hole 1 not being very tight, suck liquid medicine when pulling back core bar 4 attempts, (seeing Figure 17) air-flow can be by piston 3 the axial gap 4-1-1 of axial central through hole 3-1, core bar head 4-1 be that gap 6 to mantle cavity between the end face of the bottom surface of air flue, piston 3 and shaft 4-2 forms gas channel, mantle cavity can't form negative pressure cavity, and liquid medicine can't suck.
See Fig. 7～8, respectively be provided with groove 4-1-2,4-1-3,4-1-4 on the end face of the head 4-1 that the air flue between the head 4-1 of piston 3 and core bar 4 is taked at core bar 4, side, the bottom surface, three grooves connect into air flue.All the other are identical with embodiment 1.
See Fig. 9～10, air flue between the head 4-1 of piston 3 and core bar 4 takes to be provided with 1 axial hole 4-1-5 that connects head 4-1 on the head 4-1 of core bar 4, be provided with the radial hole 4-1-6 that communicates with axial hole 4-1-5 on the cervical region 4-3 of core bar 4, this axial hole 4-1-5 and radial hole 4-1-6 are combined into air flue.All the other are identical with embodiment 1.
See Figure 11～12, be provided with 2 at the head 4-1 of core bar 4 and connect head 4-1 and pass through the axial gap 4-1-1 that cervical region 4-3 arrives the shaft end face that this breach is air flue.All the other are identical with embodiment 1.
See Figure 13, the air flue between the head 4-1 of piston 3 and core bar 4 is arranged on the piston 3, respectively is provided with axial groove 3-2,3-3,3-4 on the end face of the inwall of piston 3 lumens, side, bottom surface, and these three grooves connect into air flue.All the other with
See Figure 15～16, the wall of overcoat ante-chamber 1-2 is provided with axial diversion groove 5-1, and piston 3 is in progradation, and last medicinal liquid can enter in the hole of conehead 1 by the axial diversion groove 5-1 on the wall of overcoat ante-chamber 1-2, and all the other are identical with embodiment 1.
The elasticity blocking cap 2 of above-mentioned all embodiment can adopt non-notch elasticity blocking cap shown in Figure 14.
Claims (10)
1, a kind of self-destruction obstruction type syringe, the core bar (4) that comprises conehead (1), overcoat (5), forms by head (4-1), cervical region (4-3) and shaft (4-2), be nested with on core bar head (4-1) and have the piston (3) of axial central through hole (3-1) and be nested with elasticity blocking cap (2) on piston (3) head, it is characterized in that: overcoat (5) front inner wall is provided with annular boss (1-3), the internal diameter of annular boss (1-3) is provided with air flue less than the external diameter of elasticity blocking cap (2) bottom between the head (4-1) of piston (3) and core bar (4).
2, a kind of self-destruction obstruction type syringe according to claim 1 is characterized in that: conehead (1) is gone up hot melt or the bonding needle stand (7) that has syringe needle.
3, a kind of self-destruction obstruction type syringe according to claim 2, it is characterized in that: be provided with push rod (2-3) at the top of elasticity blocking cap (2), push rod (2-3) can insert in the hole of conehead (1).
4, a kind of self-destruction obstruction type syringe according to claim 3 is characterized in that: be arranged with two in the bottom of elasticity blocking cap (2) and lack (2-2).
5, a kind of self-destruction obstruction type syringe according to claim 4, it is characterized in that: core bar (4) is a cross fin core bar, and the rear end of a fin has banking stop (8) therein.
6, a kind of self-destruction obstruction type syringe according to claim 1 is characterized in that: the head (4-1) in core bar (4) is provided with 1～2 axial gap (4-1-4) that connects head (4-1), and this breach is air flue.
7, self-destruction obstruction type syringe according to claim 1 is characterized in that: respectively be provided with groove (4-1-2,4-1-3,4-1-4) on the end face of the head (4-1) of core bar (4), side, bottom surface, three grooves connect into air flue.
8, a kind of self-destruction obstruction type syringe according to claim 1, it is characterized in that: on the head (4-1) of core bar (4), be provided with the axial hole (4-1-5) that connects head (4-1), be provided with the radial hole (4-1-6) that communicates with axial hole (4-1-5) on the cervical region (4-3) of core bar (4), this axial hole (4-1-5) is combined into air flue with radial hole (4-1-6).
9, a kind of self-destruction obstruction type syringe according to claim 1 is characterized in that: respectively be provided with groove (3-2,3-3,3-4) on the end face of the inwall of piston (3) lumen, side, bottom surface, three grooves connect and are combined into air flue.
10, according to the described a kind of self-destruction obstruction type syringe of one of claim 1 to 8, it is characterized in that: described overcoat (5) front inner wall is provided with axial diversion groove (5-1) or is provided with axial diversion groove (2-1) on the outer surface of elasticity blocking cap (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131870 CN1565658A (en) | 2003-06-13 | 2003-06-13 | Self-destruction and blockage type syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131870 CN1565658A (en) | 2003-06-13 | 2003-06-13 | Self-destruction and blockage type syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1565658A true CN1565658A (en) | 2005-01-19 |
Family
ID=34469793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03131870 Pending CN1565658A (en) | 2003-06-13 | 2003-06-13 | Self-destruction and blockage type syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1565658A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011075961A1 (en) * | 2009-12-23 | 2011-06-30 | Chang Shu-Ming | Improved structure for self-destruction injector |
-
2003
- 2003-06-13 CN CN 03131870 patent/CN1565658A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011075961A1 (en) * | 2009-12-23 | 2011-06-30 | Chang Shu-Ming | Improved structure for self-destruction injector |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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