WO2003047661A1 - A self destructive single use syringe - Google Patents

A self destructive single use syringe Download PDF

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Publication number
WO2003047661A1
WO2003047661A1 PCT/CN2002/000814 CN0200814W WO03047661A1 WO 2003047661 A1 WO2003047661 A1 WO 2003047661A1 CN 0200814 W CN0200814 W CN 0200814W WO 03047661 A1 WO03047661 A1 WO 03047661A1
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WO
Grant status
Application
Patent type
Prior art keywords
groove
self
thimble
shoulder
destruct
Prior art date
Application number
PCT/CN2002/000814
Other languages
French (fr)
Chinese (zh)
Inventor
Qingfeng Wu
Original Assignee
Qingfeng Wu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/508Means for preventing re-use by disrupting the piston seal, e.g. by puncturing

Abstract

The present invention relates to a self destructive single use syringe, which includes a core rod (1), an outer sleeve (2) and a transpiercing system (3). The said transpiercing system (3) is inserted a concave groove (21) which is formed on the front end of the said core rod (2) and extends backward along axial direction, and the said transpiercing system (3) includes a rod portion (32) and a needle portion (33). A stop part (4) for limiting the movement range of the said transpiercing system is formed on the front end of the said concave grove (21). The front portion (321) of the said rod portion (32) of the transpiercing system is inserted into a close fitting groove (11) of the said outer sleeve (1). The said needle portion (33) is matched with the leg portion (323) of the said rod portion (32).

Description

Auto-disable disposable syringes

FIELD

The present invention relates to a medical device, in particular, the present invention relates to a self-destruction may be disposable syringes. Background technique

In the self-destroying disposable syringe of the prior art in order to avoid self-destruction apparatus previously nip assembly and self-destruct during transport, often you need to set a belay the core rod, the core rod with respect to the fixed position of the jacket back cover so that the stem can not be fitted in the end, result in residual air before the pumping-filled syringe. Such a disposable syringe construction is relatively complex, inconvenient to use, but not for blood. SUMMARY

In order to avoid the above-described deficiencies of the prior art, the present invention provides a simple, easy to use, and can be made self-destructive system puncture disposable syringes of standard parts. The system is applicable not only to pierce slightly larger capacity syringe, and the syringe 1 milliliter for a small capacity, is also very suitable.

In the present invention, disposable syringes self-destruct system to pierceable with a groove and the core rod and vent syringes self-destruct role played together, and this vent with a recess and the stem is now art does not have.

The object of the present invention can be achieved by the following technical solution:

Preclude the use of an improved self-destroying disposable syringe, which comprises an outer syringe and the core rod, the core rod has a front end and a rearwardly axially extending grooves with the grooves across the bottom wall of the radial acknowledgment to the present vent holes, the groove system accommodated punctured, the puncture system comprises a ram and a thimble; the groove front end stopper for limiting the range of motion of the piercing system;

Said thimble comprises a tip and a trailing end of the barbed middle;

The plunger includes a tight fit back into the casing groove portion of the front, central and leg portions limiting shoulder, the front portion of the groove with a tight fit interference fit, comprising a leg portion protruding outwardly from front to back and back footer end of the inner side;

When assembled, the front portion is inserted into the jack jacket tight fit slot; the plunger and plunger leg fit, barbs which is located above the top mast foot.

In the self-destructive disposable syringe, the stopper member is an annular sleeve, the outer sleeve may have a shoulder wall; Further, the annular sleeve may be injection molded integrally with the thimble, and groove cooperates with the wall of the recess.

Of course, the above-described annular sleeve and the thimble described above may be separately formed, and cooperate with the wall of the recess barb.

Further, in the above-described self-destructive disposable syringe, the plunger inside of the leg can have a shoulder, the shoulder can not, when assembled, the shoulder of the front end of the ejector ram located on the shoulder above, which is located between the barbs of the shoulder and the top jack foot.

In the self-destroying disposable syringe according to the present invention, the retainer may be integrally injection-molded with the core rod.

In the self-destroying disposable syringe according to the present invention, the barrier between the upper surface of the stem groove and said radial vent grooves formed in the bottom wall, the thickness of the bottom wall is preferably more than 0.5 mm.

Piercing system of the invention may be mounted on either the two-piece jacket and core rods, but also may be mounted on the outer ring, the stem, and "0" of the three-piece type composition; same time, with piercing piece or three-piece system according to the present invention, the nose cone may be either in the home, and may be biased. When said casing cone center, tight fit within the first groove is the tapered bore; when said casing cone biased interference fit with the outer groove has a central axis.

Compared with the prior art, advantages of the present invention:

1, easier to use.

2, the cost is more economical. BRIEF DESCRIPTION

FIG 1 is an exploded view of the embodiment of piercing system of Example 1 of the present invention;

FIG 2 is a core of the present invention in Example 1 is a schematic view of the lever;

3 is a schematic view of Example 1 of the present embodiment of the invention assembled;

FIG 4 is a schematic diagram of embodiments of the present invention is drawn to an instant drug;

FIG 5 is a schematic view of the embodiment of the process of the present invention, the drug pump;

FIG 6 is a schematic diagram of an embodiment of the injection has been completed the present invention.

FIG 7 is an exploded view of the embodiment of piercing system of Example 2 of the present invention;

FIG 8 is a schematic view of a rod core of the Example 2 embodiment of the present invention;

FIG 9 is a schematic view of Example 2 of the present embodiment of the invention assembled;

FIG 10 is a schematic diagram of the instant embodiment of the present invention, the drug pumping Example 2;

Example 2 FIG. 11 is a schematic view of the embodiment of the process of the present invention, the drug pump;

FIG 12 is a schematic view of the embodiment of Example 2 of the present invention, the injection is almost complete;

FIG 13 is a embodiment of the present invention Example 2 injection has been completed, the syringe 33 has been pierced thimble schematic view of the bottom wall 21 closing the recess 211 of the core rod; DETAILED DESCRIPTION

DRAWINGS using the preferred embodiment of the present invention will be further described.

Example 1

Example 1 of the present invention shown in FIG. 1 to 3, comprising a jacket 1 and the core rod 2, the front end of the core rod 2 has a recess 21 extending axially rearward, the inner wall of the groove 21 has a groove 24, the said recess 21 accommodates a puncture system 3, and the tire 3 includes a jack system 32 and thimble 33. The groove 21 has a front end stopper pierceable system for limiting the range of movement 4 3; 4 of the stopper member is an annular sleeve, the outer wall of the sleeve shoulder 41, the bushing body 33 with the thimble injection molding.

The thimble 33 comprises barbs 332 and trailing end 333 of the central tip. The jack insert 32 includes an outer sleeve 321 back tight fit portion 11 of the front, middle stop shoulder 322 and leg 323, the front portion of the plunger 321 and the engaging groove 11 a tight interference fit, the leg 323 front to back top projection includes an outer leg and the rear end of the inside 326 324, refers to the inner mating face of the jack 32 and the thimble 33, the outer side of the inside of the back.

When assembled, the front portion 32 of the jack 321 is inserted into the jacket tightly fitting groove 111; and an annular shoulder 41 of the sleeve is embedded in the groove 2 in the stem 24; 33 and the thimble 32 of the jack the inner leg 323 with its barbs 332 located above the top jack 32 326 feet.

At the moment of pumping the drug, shown in Figure 4, the front outer sleeve portion 321 is tightly fitted in the groove 32 of the plunger jammed 111, the outer wall of the sleeve 4 against the shoulder 41 on the edge of the core rod 2 wall of the trench 24 , driven by the same thimble 33 from 2- pull out the core rod, so that the sleeve 4 and the thimble 33 is pulled to the top end portion of the pin jack 32 632 with respect to the backward movement of the plunger 32, ejector 33 in the middle of barbs 332 after that. When the sleeve 4 is pulled against the projection 32 of the leg portion 324, shown in Figure 5, the sleeve 4 driven rearward movement of the plunger 32, the front portion 32 of the jack 321 from a tight fitting groove 11.

Injection, push the stem 2 moves forward; near the end of injection, the end portion 32 of the jack 326 against the top leg 33 of barbs 332 central thimble. Etc. When the syringe is completely full liquid injection, shown in Figure 6, the front portion 321 of the plunger 32 into the outer sleeve 111 is a tight fitting groove, the end tip 333 of the core 33 thimble rod recess 21 of the bottom 2 punctured wall 211, in order to achieve self-destruction of the syringes.

Example 2

Example 2 shown in FIG. 7-9 of the present invention, including an outer sleeve 2 and the core rod, the core rod 2 has a distal end 21 an axially rearwardly extending recess, said recess 21 accommodates a puncture system 3, the system 3 comprises a pierced jack 32 and thimble 33; the front end 21 of the groove 3 for limiting the range of motion of the piercing member 4 limits the system, the restricting member is a separate sleeve 4, the outer wall of the sleeve projection shoulder 41, with barbs 22 21 with the recess wall.

The thimble 33 includes a front shoulder 331, undercut 332 and the trailing end of the central tip 333 ο 32 comprises a plunger into the casing 1 back tight fit groove 11 the front portion 321, the shoulder 322 and the central leg stopper 323, front portion 321 of the jack with the tight fit groove 11 an interference fit, to the rear leg portion 323 includes an outer front projection 324, the inner projection and the rear end of the top leg 326 325 inside of the inner means jack mating surface 32 and the thimble 33, the outer side of the inside of the back.

When assembled, the front portion 32 of the jack 321 is inserted into the outer tank 1 in tight-fitting 11; leg portion 32 of the thimble 33 and the jack 323 is bonded to the inside, a shoulder 331 located on the distal end thereof a shoulder 32 of the jack 325 above, barbs 332 located between the shoulder 325 and the top leg 326 of the jack 32.

At the moment of pumping the drug, 10, the front jacket portion 321 is tightly fitted in the groove 32 of the jack 111 stuck, the sleeve shoulder 41 of the outer wall 4 is an inner wall of the stem 2 is stuck to drive barbs 22 2- thimble 33 with the core rod is pulled out from outwardly to the sleeve 4 and the thimble 33 is pulled after the top end portion of the pin jack 32 632 with respect to the rearward movement of plunger 32, ejector 33 barbs 332 middle. However, because the front end of the shoulder 33 of the thimble 32 jack 331 is stuck side shoulder 325, the thimble 33 without departing from the jack 32; 32 of the mandrel sleeve 4 is stuck outside the projection 324, so that the jack 32 does not disengage from the sleeve 4. When the sleeve 4 is pulled against the protrusion 32432 jack legs, 11, the drive sleeve 4 backward movement of the plunger 32, so that the jack 32 from the front portion 321 of the tight fitting groove 11. ·

Injection, push the stem 2 moves forward; injection near the end 12, the foot end of the jack 32 against the central portion 326 of barbs 332 thimble 33. Etc. When all the liquid medicine in the syringe injection finished, 13, the front portion 321 of the plunger 32 into the clamping groove 11 of the outer sleeve 1, the end tip 333 of the core 33 thimble rod recess 21 of the bottom 2 punctured wall 211, in order to achieve self-destruction of the syringes.

In the present invention, the stopper 4 may be injection molded stem 2- body.

2 or FIG. 8, the present invention is immediately below the stem 2 the recess 21 of the bottom wall 211 of radial holes 23, the bottom wall thickness of 0.5 211 or less bile. Industrial Applicability

In the self-destroying disposable syringe according to the present invention, the self-destruct device without prior nip assembly and self-destruct during transport, and thus there is no need belay rod disposed in the core, or other extraneous materials, a simple structure, the end of the injection syringe unknowingly to achieve self-destruction, particularly convenient to use. This technology is not only suitable for large-capacity syringe, it is also very suitable for small capacity syringe. Self-destruction performance of the invention in conjunction with no residual design, especially for low dose injection, such as vaccines, vaccination and the like.

Claims

Rights request
A disposable self-destructive syringe comprising outer sleeve (1) and the core rod (2), characterized in that:
The injector system further includes a pierced (3), the piercing system (3) embedded in said stem (2) a recess (21) extending axially rearwardly of the leading end of the pierced system (3) comprises a top rod (32) and a thimble (33), the groove (21) for limiting distal piercing system (3) range of motion limiting member (4);
Said thimble (33) comprises barbs (332) and the trailing end of the central tip (333); said jack (32) comprises an insert housing (1) back tight fit groove (11) of the front portion (321), central stop shoulder (322) and legs (323), said front portion (321) with a tight fitting groove (11) for the interference fit, the leg (323) includes an outer front to rear projection (324) and the rear end of the top foot inner side (326);
When assembled, the front portion of the jack (32) (321) into the casing (1) is a close fit within the groove (11); a thimble (33) and the ram (32) of the leg portion (323) with which barbs (332) positioned mandrel (32) over a top pin (326).
2, disposable syringes self-destruct as claimed in claim 1, wherein: the retainer (4) is a ring-shaped boss, the outer wall of the hub shoulder (41).
3, disposable syringes self-destruct as claimed in claim 2, wherein: said annular sleeve and the thimble (33) - an injection molded body, with the recess groove (21) wall (24) with . 4, disposable syringes self-destruct as claimed in claim 2, wherein: said annular sleeve and the thimble (33) separately formed, with the recess (21) wall of the undercut (22).
5, disposable syringes self-destruct as claimed in claim 4, wherein: said plunger (32) of the leg (323) has inner shoulder (325), the front end of the thimble (33) are a shoulder (331), when assembled, the ΰ shoulder (331) located on mandrel (32) of the shoulder
Above (325), which undercut (332) located in the shoulder ram (32) (325) and a top leg
Between (326).
6, disposable syringes self-destruct as claimed in claim 1, wherein: the retainer (4) and the stem (2) - an injection molded body.
7, disposable syringes self-destruct as claimed in claim 1, wherein: said stem immediately (2) a bottom wall of the recess (21) (211) below a radial bore (23).
8, disposable syringes self-destruct as claimed in claim 7, wherein: said groove bottom wall (211) in a thickness of 0.5 below the surface.
9, disposable syringes self-destruct as claimed in claim 1, wherein: said housing (1) facing the cone bore, the tight fitting groove (11) is the cone bore. 10, disposable self-destructive syringe as claimed in claim 1, wherein: said tapered bore offset head housing (1), the tight fit groove (11) and the housing (1) having the same center axis.
PCT/CN2002/000814 2001-12-05 2002-11-18 A self destructive single use syringe WO2003047661A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN01258513.0 2001-12-05
CN 01258513 CN2501515Y (en) 2001-12-05 2001-12-05 Self-destroyable disposable syringe
CN02272920.8 2002-08-29
CN 02272920 CN2574701Y (en) 2002-08-29 2002-08-29 Medical oxygen humidifier

Publications (1)

Publication Number Publication Date
WO2003047661A1 true true WO2003047661A1 (en) 2003-06-12

Family

ID=25740959

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2002/000814 WO2003047661A1 (en) 2001-12-05 2002-11-18 A self destructive single use syringe

Country Status (1)

Country Link
WO (1) WO2003047661A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991008011A1 (en) * 1989-11-23 1991-06-13 Patrice Elfandi Injection material (syringe and needle) unusable after a single use
CN1055487A (en) * 1990-04-13 1991-10-23 阿兰·哈玛米 Once used hypodermic syringe
WO1994020162A1 (en) * 1993-03-03 1994-09-15 New Applications In Plastic, S.L. New disposable hypodermic syringe
WO1994028955A2 (en) * 1993-06-03 1994-12-22 Daniel Delannoy Self destructive single use medical syringe
US5382235A (en) * 1993-07-07 1995-01-17 R.M.S. Safety, Inc. Device for capturing and retracting the needle cannula of a disposable syringe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991008011A1 (en) * 1989-11-23 1991-06-13 Patrice Elfandi Injection material (syringe and needle) unusable after a single use
CN1055487A (en) * 1990-04-13 1991-10-23 阿兰·哈玛米 Once used hypodermic syringe
WO1994020162A1 (en) * 1993-03-03 1994-09-15 New Applications In Plastic, S.L. New disposable hypodermic syringe
WO1994028955A2 (en) * 1993-06-03 1994-12-22 Daniel Delannoy Self destructive single use medical syringe
US5382235A (en) * 1993-07-07 1995-01-17 R.M.S. Safety, Inc. Device for capturing and retracting the needle cannula of a disposable syringe

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