CN2664691Y - Self-destruct block type syringe - Google Patents
Self-destruct block type syringe Download PDFInfo
- Publication number
- CN2664691Y CN2664691Y CN 03222665 CN03222665U CN2664691Y CN 2664691 Y CN2664691 Y CN 2664691Y CN 03222665 CN03222665 CN 03222665 CN 03222665 U CN03222665 U CN 03222665U CN 2664691 Y CN2664691 Y CN 2664691Y
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- China
- Prior art keywords
- head
- hole
- piston
- core bar
- self
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- Expired - Lifetime
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Abstract
A self-destruction plugging syringe comprises a cone head, a core pin composed of a head and a rod, an outer jacket, a piston jacketed on the head of the core pin and provided with an axial centre via, and a flexible plug cap jacketed on the piston head. The cone head hole is composed of the small front hole and the big rear hole. The wall of the big rear hole end is provided with an annular lug boss. The outer diameter of the lower part of the flexible plug cap is larger than the inner diameter of the annular lug boss. The front part of the piston can be extended into the big rear hole of the cone head hole. An airway is arranged between the piston and the head of the core pin. In the utility model, a flexible plug cap is arranged on the piston, and an airway is arranged between the core pin head and the piston. The measures of the front plugging and the rear air inflow are taken, so that the performance is safe and reliable with simple structure. The hot melting and bonding of the needle stand with the needle on the cone head is adopted in the utility model to prevent the reuse of the needles. Through the arrangement of the stopper, the incorrect manipulation can be prevented. The utility model is more appropriate for the syringes with large specifications.
Description
Technical field
This utility model 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, this moment, resilient sleeve passed 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.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 part 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.
The utility model content
The purpose of this utility model is to propose a kind of self-destruction obstruction type syringe that syringe is promptly wracked after injection is finished.
The core bar that this utility model comprises conehead, overcoat, be 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, above-mentioned cone head hole is made up of preceding aperture and back macropore, has annular boss on the terminal hole wall of back macropore, the external diameter of elasticity blocking cap bottom is greater than the internal diameter of annular boss, the front portion of piston can be stretched in the back macropore of cone head hole, for achieving the above object, this utility model is taked to be provided with air flue between the head of piston and core bar.
The back macropore of described cone head hole is round table-like or cylindric, and the back macropore hole wall of cone head hole is provided with the axial diversion groove or is provided with the axial diversion groove on the outer surface of elasticity blocking cap.
The back macropore of described cone head hole is round table-like, the dynamic water conservancy diversion crack that forms between the round table-like back macropore of elasticity blocking cap and cone head hole.
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 preceding aperture of cone head hole.
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 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, these three grooves connect into 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 the core bar of head bottom, 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.
This utility model 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.This utility model is taked 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.The relatively more suitable bigger syringe of specification of this utility model.
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 embodiment 6 core bar head diagrammatic sketch;
Figure 21 is that the I of Figure 20 is to view;
Figure 22 is embodiment 7 configuration diagram;
Figure 23 is the J-J profile of Figure 22;
Figure 24 is for pulling back the core bar state diagram.
The specific embodiment
See Fig. 1～6 and Figure 12, the core bar 4 that embodiment 1 comprises conehead 1, overcoat 5, be made up of head 4-1, cervical region 4-3 and shaft 4-2, be nested with on the core bar head 4-1 and have axial central through hole 3-1 piston 3, be nested with the elasticity blocking cap 2 on piston 3 heads.Above-mentioned cone head hole is made up of preceding aperture 1-1 and round table-like back macropore 1-2; has annular boss 1-3 on the terminal hole wall of round table-like back macropore 1-2; 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; make the bottom of elasticity blocking cap 2 can be with spatial size of living in; inwardly draw in or outwards open; inwardly drew in its underpart when core bar 4 promoted elasticity blocking caps 2 and advances the annular boss 1-3 of after by cone head hole macropore 1-2; after passing through the annular boss 1-3 of macropore 1-2 behind the cone head hole by force; outwards open elasticity blocking cap 2 bottoms; because annular boss 1-3 stops that elasticity blocking cap 2 is trapped in the cone head hole.The front portion of piston 3 can be stretched in the back macropore 1-2 of cone head hole, is provided with 1 axial gap 4-1-1 that connects head 4-1 by cervical region 4-3 arrival shaft 4-2 end face at the head 4-1 of core bar 4, and this breach is air flue.Because of the back macropore 1-2 of cone head hole is round table-like, the profile of elasticity blocking cap 2 is also similar round table-like, elasticity blocking cap 2 is not in shifting cone head hole 1 onto the time, and there is the gap between the round table-like back macropore 1-2, this gap can become the water conservancy diversion crack, along with round table-like elasticity blocking cap 2 advances, the gap narrows down gradually, so be referred to as dynamic water conservancy diversion crack.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, therein-rear end of fin has banking stop 8, 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 was pushed ahead, the head 4-1 end face of core bar 4 contacted with the front of piston 3 lumens, because piston 3 heads overlap flexible blocking cap 2, core bar 2 is released liquid medicine.Piston is in progradation, and last medicinal liquid can enter cone head hole 1 by the round table-like dynamic water conservancy diversion crack that afterwards forms between the macropore 1-2 of elasticity blocking cap 2 and cone head hole, 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 2 is shifted the end onto, elasticity blocking cap 2 gets lodged in the cone head hole, as elasticity blocking cap 2 and cooperating of cone head hole not being very tight, (seeing Figure 20) sucks liquid medicine when pulling back core bar 2 attempts, 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 by the axial gap 4-1-1 of axial central through hole 3-1, the core bar head 4-1 of piston 3, mantle cavity can't form negative pressure cavity, and liquid medicine can't suck.
Above-mentioned elasticity blocking cap 2 can adopt medical plastic or rustless steel to make, and other part all adopts the material of country or industry pertinent regulations.
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 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 Fig. 9～10, air flue between the piston 3 of present embodiment and the head 4-1 of core bar 4 takes to be provided with an axial hole 4-1-5 who 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 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 substantially the same manner as Example 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 these three grooves connect into air flue.All the other are identical with embodiment 1.
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 cone head hole 1 by the axial diversion groove 2-1 on the elasticity blocking cap 2, and all the other are identical with embodiment 1.
Embodiment 6
See Figure 17～21, present embodiment 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, be nested with the elasticity blocking cap 2 on piston 3 heads, above-mentioned cone head hole is made up of preceding aperture 1-1 and back macropore 1-2, back macropore 1-2 is cylindric, has annular boss 1-3 on the terminal hole wall of back macropore 1-2, 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, the front portion of piston 3 can be stretched in the back macropore 1-2 of cone head hole, be provided with 2 axial gap 4-1-1 that connect head 4-1 at the head 4-1 of core bar 4, this breach is air flue, the outer surface of elasticity blocking cap 2 is provided with axial diversion groove 2-1, and last medicinal liquid can enter cone head hole 1 by the axial diversion groove 2-1 on the elasticity blocking cap 2.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, and the rear end of a fin has banking stop 8 therein.
See Figure 22～23, be provided with axial diversion groove 1-4 on the back macropore 1-2 hole wall of cone head hole, last medicinal liquid can enter cone head hole 1 by the axial diversion groove 1-4 on the back macropore 1-2 hole wall of cone head hole.All the other are identical with embodiment 6.
Other embodiment can change the air flue setting on the basis of embodiment 6 or 7, air flue is provided with reference to embodiment 1,2 or 3.
The elasticity blocking cap 2 of above-mentioned all embodiment can adopt non-notch elasticity blocking cap shown in Figure 13.
Claims (11)
1, a kind of self-destruction obstruction type syringe, comprise conehead (1), overcoat (5), 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), be nested with the elasticity blocking cap (2) on piston (3) head, above-mentioned cone head hole is made up of preceding aperture (1-1) and back macropore (1-2), has annular boss (1-3) on the terminal hole wall of back macropore (1-2), the external diameter of elasticity blocking cap (2) bottom is greater than the internal diameter of annular boss (1-3), the front portion of piston (3) can be stretched in the back macropore (1-2) of cone head hole, it is characterized in that: be provided with air flue between the head (4-1) of piston (3) and core bar (4).
2, self-destruction obstruction type syringe according to claim 1, it is characterized in that: the back macropore (1-2) of described cone head hole is for round table-like or cylindric, and back macropore (1-2) hole wall of cone head hole 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 syringe according to claim 1 is characterized in that: the back macropore (1-2) of described cone head hole is round table-like, the dynamic water conservancy diversion crack that forms between the round table-like back macropore (1-2) of elasticity blocking cap (2) and cone head hole.
4, according to claim 2 or 3 described self-destruction obstruction type syringes, it is characterized in that: conehead (1) is gone up hot melt or the bonding needle stand (7) that has syringe needle.
5, self-destruction obstruction type syringe according to claim 4 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 preceding aperture (1-1) of cone head hole.
6, self-destruction obstruction type syringe according to claim 5, 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.
7, self-destruction obstruction type syringe according to claim 6, it is characterized in that: the bottom of elasticity blocking cap (2) is arranged with two breach (2-2).
8, 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 (4-1-1) that connects head (4-1), and this breach is air flue.
9, 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, these three grooves connect into air flue.
10, 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 of core bar (4), this axial hole (4-1-5) is combined into air flue with radial hole (4-1-6).
11, 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, these three grooves connect into air flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03222665 CN2664691Y (en) | 2003-06-13 | 2003-06-13 | Self-destruct block type syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03222665 CN2664691Y (en) | 2003-06-13 | 2003-06-13 | Self-destruct block type syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2664691Y true CN2664691Y (en) | 2004-12-22 |
Family
ID=34325940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03222665 Expired - Lifetime CN2664691Y (en) | 2003-06-13 | 2003-06-13 | Self-destruct block type syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2664691Y (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 03222665 patent/CN2664691Y/en not_active Expired - Lifetime
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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060628 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |