CN1251771C - Self-destruction and blockage integrated syringe - Google Patents
Self-destruction and blockage integrated syringe Download PDFInfo
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- CN1251771C CN1251771C CN 03131871 CN03131871A CN1251771C CN 1251771 C CN1251771 C CN 1251771C CN 03131871 CN03131871 CN 03131871 CN 03131871 A CN03131871 A CN 03131871A CN 1251771 C CN1251771 C CN 1251771C
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- head
- core bar
- piston
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- chamber
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Abstract
The present invention relates to a self-ruin blocking type integrated injector which comprises a cylinder body, a core bar, a piston and an elastic plugging cap, wherein a needle is inserted in the front end of the cylinder body; the core bar is composed of a head and a bar body; the piston is sheathed on the head of the core bar and is provided with an axial central through hole; the elastic plugging cap is sheathed on the head of the piston. To reach the goal, the inner wall of the chamber at the front of the cylinder body is provided with an annular lug boss, the external diameter of the lower part of the elastic plugging cap is larger than the inner diameter of the annular lug boss, and an air passage is formed between the piston and the head of the core bar. The present invention has the advantages of safe and reliable performance and simple structure because the piston is provided with the elastic plugging cap, the air passage is formed between the head of the core bar and the piston, and the measure that the front part is blocked and air enters the injector from the back part is adopted. The needle and the cylinder body of the present invention are integrated, which prevents the needle from being repeatedly used. The arrangement of a limiting member can prevent false operation.
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 injecting liquid drug finishes, resilient sleeve passes completely through annular boss, as pull back core bar, resilient sleeve is subjected to the prevention of annular boss, can't withdraw from, and resilient sleeve gets lodged in and reaches the purpose that syringe can't reuse in the cone head hole.The syringe needle of above-mentioned disposable syringe and syringe are isolating, have the reusable possibility of syringe needle possibility; In addition 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, has the fraction medicinal liquid to be inhaled into cone head hole by the gap between resilient sleeve and conehead hole wall and enters in the mantle cavity.
Summary of the invention
The objective of the invention is to propose a kind of self-destruction obstruction type combined syringe that syringe is promptly wracked after injection is finished.
The present invention includes core bar that front end is inserted with the cylindrical shell of syringe needle, is made up of 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 anterior cavity wall of cylindrical shell is provided with annular boss, the lower outer diameter of elasticity blocking cap is provided with air flue greater than the internal diameter of annular boss between the head of piston and core bar.
The inwall in the anterior chamber of described cylindrical shell is provided with the axial diversion groove or is provided with the axial diversion groove on the outer surface of elasticity blocking cap.
The anterior chamber of described cylindrical shell is round table-like chamber, and then the gap between the chamber wall in the anterior chamber of elasticity blocking cap and cylindrical shell forms dynamic water conservancy diversion crack.
Above-mentioned core bar is a cross fin core bar, and the rear end of a fin is provided with banking stop therein.
The bottom of above-mentioned elasticity blocking cap is arranged with two breach.
Can be provided with 1～2 and connect head and arrive the axial gap of shaft end face by cervical region on the head of core bar, this breach is an air flue.
Can be provided with the axial hole that connects head on the head of core bar, be provided with the radial hole that communicates with the axial hole on cervical region, this axial hole and radial hole are combined into 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 respectively be provided with groove on the end face of the inwall of piston lumen, side, bottom surface, these three grooves connect and are combined into air flue.
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.Syringe needle of the present invention and cylindrical shell one prevent the repeated use of syringe needle; The setting of locating part can prevent maloperation.
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 the C-C profile of Fig. 1;
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 club head configuration diagram of embodiment 3;
Figure 10 is that the F of Fig. 9 is to view;
Figure 11 is the piston diagrammatic sketch of embodiment 4;
Figure 12 is a kind of elasticity blocking cap diagrammatic sketch;
Figure 13 is another kind of elasticity blocking cap diagrammatic sketch;
Figure 14 is embodiment 5 configuration diagram;
Figure 15 is the M-M profile of Figure 14;
Figure 16 is the N-N profile of Figure 14;
Figure 17 is embodiment 6 configuration diagram;
Figure 18 is the G-G profile of Figure 17;
Figure 19 is the H-H profile of Figure 17;
Figure 20 is the core bar head diagrammatic sketch of embodiment 7;
Figure 21 is that the I of Figure 20 is to view;
Figure 22 is embodiment 8 configuration diagram;
Figure 23 is the J-J profile of Figure 22;
Figure 24 is embodiment 9 configuration diagram;
Figure 25 is for pulling back the core bar state diagram.
The specific embodiment
See Fig. 1～6; Figure 12; present embodiment comprises cylindrical shell 1; core bar 4; cylindrical shell 1 front end is inserted with syringe needle 5; cylinder chamber is divided into anterior chamber 1-2 and rear chamber 1-1; anterior chamber 1-2 is round table-like chamber; core bar 4 is by head 4-1; cervical region 4-3 and shaft 4-2 form; be equipped with piston 3 on the core bar head 4-1 with axial central through hole 3-1; cylindrical shell 1 anterior cavity wall is provided with annular boss 1-3; the front portion of piston 3 can be stretched in the anterior chamber 1-2 of cylindrical shell 1; be equipped with elasticity blocking cap 2 on piston 3 heads; the lower outer diameter of elasticity blocking cap 2 is greater than the internal diameter of annular boss 1-3; be provided with two breach 2-2 in the bottom of elasticity blocking cap 2, the bottom of elasticity blocking cap 2 can be with spatial size of living in, inwardly draws in or outwards opens; core bar 4 promotes elasticity blocking cap 2 by piston 3 and advances; inwardly draw in its underpart when the annular boss 1-3 by the anterior chamber 1-2 of cylindrical shell, and by behind the annular boss 1-3 of cylindrical shell, outwards open elasticity blocking cap 2 bottoms by force; because annular boss 1-3 stops that elasticity blocking cap 2 is trapped in the anterior chamber 1-2.Be provided with 1 axial gap 4-1-1 that connects head 4-1 by cervical region 4-3 arrival shaft end face at the head 4-1 of core bar 4, this breach is air flue.Elasticity blocking cap 2 is in the hole of not shifting conehead 1 onto the time, and has the gap between the round table-like back macropore 1-2, and this gap can become the water conservancy diversion crack, and along with the propelling of piston 3, elasticity blocking cap 2 narrows down gradually with 1-2 gap, the anterior chamber of cylindrical shell, so be referred to as dynamic water conservancy diversion crack.The shaft 4-2 of core bar 4 is a cross fin core bar, the rear end of a fin is provided with banking stop 8 therein, banking stop 8 and shaft one, the maloperation that prevents to need to twitch core bar 4 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, because piston 3 heads overlap flexible blocking cap 2, core bar 4 is released liquid medicine, piston is in progradation, last medicinal liquid can be by elasticity blocking cap 2 and cylindrical shell 1 the chamber wall of anterior chamber 1-2 between dynamic water conservancy diversion crack enter syringe needle, 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 preceding aperture 1-1 of cone head hole, to reduce medicinal liquid residual flow amount.When core bar 4 on earth the time, elasticity blocking cap 2 gets lodged in the anterior chamber 1-2 of cylindrical shell, as elasticity blocking cap 2 and cooperating of cone head hole not being very tight, (seeing Figure 25) is when pulling back core bar 4 attempt suction liquid medicine, form gas channel by gap 6 to the cylinder chamber between the end face of the bottom surface of the air flue 4-1-1 of axial central through hole 3-1, the core bar head 4-1 of piston 3, piston 3 and shaft 4-2, cylinder chamber can't form negative pressure cavity, and liquid medicine can't suck.
See Fig. 7～8, air flue between the piston 3 of present embodiment and the head 4-1 of 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 cervical region 4-3, 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 Fig. 9～10, 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 piston 3 of present embodiment and the head 4-1 of 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 Figure 11, the air flue between the piston 3 of present embodiment and the head 4-1 of core bar 4 is arranged on the piston 3, respectively is provided with groove 3-2,3-3,3-4 on the end face of the inwall of piston 3 lumens, side, bottom surface, and three grooves connect into air flue.All the other with
See Figure 14～16, present embodiment is provided with axial diversion groove 2-1 on the outer surface of elasticity blocking cap 2, and piston is in progradation, and last medicinal liquid can enter syringe needle by the axial diversion groove 2-1 on elasticity blocking cap 2 outer surfaces, and all the other are identical with embodiment 1.
Embodiment 6
See Figure 17～19, present embodiment comprises cylindrical shell 1, core bar 4, cylindrical shell 1 front end is inserted with syringe needle 5, cylinder chamber is divided into anterior chamber 1-2 and rear chamber 1-1, anterior chamber 1-2 is cylindric chamber, core bar 4 is by head 4-1, cervical region 4-3 and shaft 4-2 form, be equipped with piston 3 on the core bar head 4-1 with axial central through hole 3-1, the anterior chamber of cylindrical shell 2-1 wall is provided with annular boss 1-3, the front portion of piston 3 can be stretched in the anterior chamber 1-2 of cylindrical shell 1, be equipped with elasticity blocking cap 2 on piston 3 heads, the external diameter of elasticity blocking cap 2 bottoms is greater than the internal diameter of annular boss 1-3, be provided with two breach 2-2 in the bottom of elasticity blocking cap 2, be provided with 1 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, this breach is air flue, and the outer surface of elasticity blocking cap 2 is provided with axial diversion groove 2-1.The shaft 4-2 of core bar 4 is a cross fin core bar, and the rear end of a fin has banking stop 8 therein.
Embodiment 7
See Figure 20～21, 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 6.
Embodiment 8
See Figure 22～23, the anterior chamber of cylindrical shell 2-1 wall is provided with axial diversion groove 1-4, and piston is in progradation, and last medicinal liquid can enter syringe needle by the axial diversion groove 1-4 on the 2-1 wall of simplified anterior chamber, and all the other are identical with embodiment 6.
Embodiment 9
See Figure 24, present embodiment comprises cylindrical shell 1, core bar 4, cylindrical shell 1 front end is inserted with syringe needle 5, and cylinder chamber is the system chamber, and the cylinder chamber front walls is provided with annular boss 1-3, be equipped with elasticity blocking cap 2 on piston 3 heads, the external diameter of elasticity blocking cap 2 bottoms is provided with two breach 2-2 greater than the internal diameter of annular boss 1-3 in the bottom of elasticity blocking cap 2, be provided with 1 axial gap 4-1-1 that connects head 4-1 at the head 4-1 of core bar 4, this breach is air flue, and the outer surface of elasticity blocking cap 2 is provided with axial diversion groove 2-1.The shaft 4-2 of core bar 4 is a cross fin core bar, and the rear end of a fin has banking stop 8 therein.
Other embodiment can change the air flue setting on the basis of embodiment 6 or embodiment 9.Air flue setting can reference example 2,3,4.
The elasticity blocking cap 2 of above-mentioned all embodiment can adopt non-notch elasticity blocking cap shown in Figure 13.
Claims (9)
1, a kind of self-destruction obstruction type combined syringe, comprise that front end is inserted with the cylindrical shell of syringe needle (5) (1), by head (4-1), the core bar (4) that cervical region (4-3) and shaft (4-2) are formed, be nested with the piston (3) of going up and having axial central through hole (3-1) at core bar head (4-1), and be nested with elasticity blocking cap (2) on piston (3) head, it is characterized in that: the anterior cavity wall of cylindrical shell (1) is provided with annular boss (1-3), the lower outer diameter of elasticity blocking cap (2) is provided with air flue greater than the internal diameter of annular boss (1-3) between the head (4-1) of piston (3) and core bar (4).
2, self-destruction obstruction type combined syringe according to claim 1, it is characterized in that: the anterior chamber of described cylindrical shell (1) (1-2) is round table-like chamber or cylindric chamber, and forwardly the inwall of chamber (1-2) is provided with axial diversion groove (1-4) or is provided with axial diversion groove (2-1) on the outer surface of elasticity blocking cap (2).
3, self-destruction obstruction type combined syringe according to claim 1, it is characterized in that: the anterior chamber (1-2) of described cylindrical shell (1) is round table-like chamber, and then the gap between the chamber wall in the anterior chamber (1-2) of elasticity blocking cap (2) and cylindrical shell (1) forms dynamic water conservancy diversion crack.
4, according to claim 2 or 3 described self-destruction obstruction type combined syringes, it is characterized in that: core bar (4) is a cross fin core bar, and the rear end of a fin is provided with banking stop (8) therein.
5, self-destruction obstruction type combined syringe according to claim 4, it is characterized in that: the bottom of elasticity blocking cap (2) is arranged with two breach (2-2).
6, self-destruction obstruction type combined syringe according to claim 1, it is characterized in that: the head (4-1) in core bar (4) is provided with 1～2 and connects head (4-1) and pass through the axial gap (4-1-1) that cervical region (4-3) arrives shaft (4-2) end face, and this breach (4-1-1) is an air flue.
7, self-destruction obstruction type combined 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 cervical region (4-3), this axial hole (4-1-5) is combined into air flue with radial hole (4-1-6).
8, self-destruction obstruction type combined 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.
9, self-destruction obstruction type combined 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, these three grooves connect and are combined into air flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131871 CN1251771C (en) | 2003-06-13 | 2003-06-13 | Self-destruction and blockage integrated syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131871 CN1251771C (en) | 2003-06-13 | 2003-06-13 | Self-destruction and blockage integrated syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1565659A CN1565659A (en) | 2005-01-19 |
| CN1251771C true CN1251771C (en) | 2006-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03131871 Expired - Fee Related CN1251771C (en) | 2003-06-13 | 2003-06-13 | Self-destruction and blockage integrated syringe |
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| Country | Link |
|---|---|
| CN (1) | CN1251771C (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 03131871 patent/CN1251771C/en not_active Expired - Fee Related
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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| Publication number | Publication date |
|---|---|
| CN1565659A (en) | 2005-01-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |