US20020077602A1 - Needle holder positioning structure for a safety syringe - Google Patents
Needle holder positioning structure for a safety syringe Download PDFInfo
- Publication number
- US20020077602A1 US20020077602A1 US09/738,997 US73899700A US2002077602A1 US 20020077602 A1 US20020077602 A1 US 20020077602A1 US 73899700 A US73899700 A US 73899700A US 2002077602 A1 US2002077602 A1 US 2002077602A1
- Authority
- US
- United States
- Prior art keywords
- needle holder
- needle
- syringe
- hook members
- neck portion
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/34—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub
- A61M5/348—Constructions for connecting the needle, e.g. to syringe nozzle or needle hub snap lock, i.e. upon axial displacement of needle assembly
Definitions
- the positioning projecting ring 12 serves to position a needle sleeve 3 .
- the front end of a piston head 41 of a piston 4 is provided with a coupling member 42 corresponding to the flared hole 22 and the enlarged opening 23 of the needle holder 2 so as to permit retraction of the needle holder 2 with the needle 21 .
- a coupling member 42 corresponding to the flared hole 22 and the enlarged opening 23 of the needle holder 2 so as to permit retraction of the needle holder 2 with the needle 21 .
- the outer edge of the needle sleeve 3 is provided with recesses 31 corresponding to the hook members 14 .
Abstract
A needle holder positioning structure for a safety syringe includes a syringe with a neck portion having a top end forming a positioning projecting ring, an inner edge of a lower end of the neck portion upwardly and integrally formed with a forked elastic sleeve, with a rear end inwardly forming hook members, a bottom end of a needle holder for receiving a needle being inwardly provided with a flared hole having a rear end forming an enlarged opening, the bottom end of the needle holder being outwardly provided with a guide face, and an outer side formed with depressions corresponding to the hook members.
Description
- (a) Field of the Invention
- The invention relates to a needle holder positioning structure for a safety syringe, more particularly to a low-cost structure that allows precise positioning.
- (b) Description of the Prior Art
- R.O.C. Patent Publication No. 332433 discloses an improved safety syringe structure having a needle holder positioning structure as shown in FIGS.5 to 9. A rear end of a
needle holder 5 is provided with a flaredhole 51 which is enlarged to form an arrow-shaped cavity 52 for receiving an arrow-shaped coupling member 62 provided at the front end of apiston head 61 of apiston 6. After injection, thecoupling member 62 and thecavity 52 are coupled integrally. Therefore, when thepiston 6 is pulled back, the needle holder 5 together with theneedle 53 is disengaged from theneck portion 71 of thesyringe 7 to pull the needle 63 into the interior of thesyringe body 72 of thesyringe 7 so as not to expose on the outside to ensure safety. - Further, since in that patent the
needle holder 5 is disposed in theneck portion 71 of thesyringe 7, in order that theneedle holder 5 can be smoothly pulled back, theneedle holder 5 must be formed from elastic rubber material instead of the conventionally used plastic material. However, as rubber is much more expensive than plastic, and the elastic characteristic of rubber may affect the positioning of theneedle 53, that patent has the disadvantages of high costs and improper positioning. - There are other related prior art patents, which include U.S. Pat. Nos. 4,932,939, 5,163,907, 5,910,130, 5,879,339, 5,902,277, 5,902,271, 5,902,270, 5,902,269, 5,395,346, 4,737,144, 5,344,403, and 5,569,203.
- The primary object of the present invention is to provide a needle holder positioning structure for a safety syringe, which is inexpensive to manufacture.
- Another object of the present invention is to provide a needle holder positioning structure for a safety syringe, which permits precise positioning of the needle.
- In order to achieve the above objects, the present invention is characterized in that the inner edge of a lower end of a neck portion of a syringe is upwardly and integrally formed with a forked elastic sleeve and hook members, and a needle holder is corresponding provided with depressions so as to couple the needle holder to the neck portion of the syringe by means of hooking and elastic retention, and the needle holder together with the needle can be pulled back into the interior of the syringe. Furthermore, the needle holder can be made of plastic material. Plastic needle holders are low-cost and permit precise positioning as compared with rubber needle holders.
- The foregoing and other features and advantages of the present invention will be more clearly understood from the following detailed description and the accompanying drawings, in which,
- FIG. 1 is a sectional view of the structure of the embodiment of this invention prior to coupling;
- FIG. 2 is a sectional view of the structure of the embodiment of this invention after coupling;
- FIG. 3 is a schematic view showing the embodiment of this invention assembled to a safety injection syringe;
- FIG. 4 is a schematic view illustrating pulling back of the embodiment of this invention;
- FIG. 5 is a schematic view illustrating reverse fitting of a needle sleeve of the embodiment of this invention;
- FIG. 6 is a schematic view showing a needle holder positioning structure of Publication No. 332433;
- FIG. 7 is a schematic view showing the process of reverse pulling of the needle holder of Publication No. 332433;
- FIG. 8 is another schematic view showing the process of reverse pulling of the needle holder of Publication No. 332433;
- FIG. 9 is a further schematic view showing the process of reverse pulling of the needle holder of Publication No. 332433; and
- FIG. 10 is still another schematic view showing the process of reverse pulling of the needle holder of Publication No. 332433.
- With reference to FIGS. 1 and 2, the invention includes a
syringe 1 having aneck portion 11 that forms apositioning projecting ring 12 at a top end. The inner edge of the lower end of theneck portion 11 upwardly and integrally forms a forkedelastic sleeve 13, andhook members 14 are formed inwardly at the rear end. The rear end of aneedle holder 2 for receiving aneedle 21 is inwardly provided with a flaredhole 22 with a distal end forming an enlargedopening 23. The bottom end of theneedle holder 2 is outwardly formed with aguide face 24, withdepressions 25 formed in the outer side to correspond to thehook members 14. - With reference to FIG. 3, the
positioning projecting ring 12 serves to position aneedle sleeve 3. The front end of apiston head 41 of apiston 4 is provided with acoupling member 42 corresponding to theflared hole 22 and the enlargedopening 23 of theneedle holder 2 so as to permit retraction of theneedle holder 2 with theneedle 21. However, as such a structure is not the subject matter of this invention, it will not be described in detail herein. Referring to FIGS. 3 and 5, the outer edge of theneedle sleeve 3 is provided withrecesses 31 corresponding to thehook members 14. When theneedle 21 is pulled back to the interior of asyringe body 15, theneedle sleeve 3 is fitted in a reverse direction to cause therecesses 31 and thehook members 14 to come to a retained state, thereby preventing extension of the needle and leakage of possible residual blood in thesyringe 1 to ensure safety. - Based on the above construction, the
flared hole 22 of theneedle holder 2 is configured to be able to retract inwardly and elastically, the guide face 24 guides into theneck portion 11 of thesyringe 1, thedepressions 25 retain thehook members 14 of thesyringe 1, and theelastic sleeve 13 positions the needle holder 2 firmly with its inward retaining force (see FIG. 2). In addition, after injection, when thepiston 4 is pulled back (the relationship between thepiston 4 and theneedle holder 2 being described hereinabove), the back pulling force may offset the inward retaining force of theelastic sleeve 13 to cause theneedle 21 to be pulled back into the interior of thesyringe body 15. Therefore, this invention employs hooking and elastic retaining force to couple theneedle holder 2 to theneck portion 1 1 of thesyringe 1, and is directly formed by plastic injection molding, without the need to use rubber material as in the prior art. This not only reduces costs, the plastic needle holder allows more precise positioning of theneedle 21. - Although the present invention has been illustrated and described with reference to the preferred embodiment thereof, it should be understood that it is in no way limited to the details of such embodiment but is capable of numerous modifications within the scope of the appended claims.
Claims (2)
1. A needle holder positioning structure for a safety syringe, comprising a syringe with a neck portion having a top end forming a positioning projecting ring, an inner edge of a lower end of said neck portion upwardly and integrally formed with a forked elastic sleeve, with a rear end inwardly forming hook members, a bottom end of a needle holder for receiving a needle being inwardly provided with a flared hole having a rear end forming an enlarged opening, the bottom end of said needle holder being outwardly provided with a guide face, and an outer side formed with depressions corresponding to said hook members.
2. The needle holder positioning structure for a safety syringe of claim 1 , wherein said needle sleeve fitted on said positioning projecting ring has an outer edge provided with recesses corresponding to said hook members.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/738,997 US6436076B1 (en) | 2000-12-19 | 2000-12-19 | Needle holder positioning structure for a safety syringe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/738,997 US6436076B1 (en) | 2000-12-19 | 2000-12-19 | Needle holder positioning structure for a safety syringe |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020077602A1 true US20020077602A1 (en) | 2002-06-20 |
US6436076B1 US6436076B1 (en) | 2002-08-20 |
Family
ID=24970382
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/738,997 Expired - Fee Related US6436076B1 (en) | 2000-12-19 | 2000-12-19 | Needle holder positioning structure for a safety syringe |
Country Status (1)
Country | Link |
---|---|
US (1) | US6436076B1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030153878A1 (en) * | 2002-02-08 | 2003-08-14 | Chin-Shu Huang | Safety syringe having needle holder capable of fixing secured and easy to drawback |
EP1369138A1 (en) * | 2002-06-03 | 2003-12-10 | Fu-Yu Hsu | Needle holder positioning structure for a safety syringe |
US20070135824A1 (en) * | 2005-12-09 | 2007-06-14 | O'brien Todd | Suture needle retention device |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7217258B2 (en) * | 2003-05-02 | 2007-05-15 | Becton, Dickinson And Company | Controlled release structure for attaching medical devices |
US7115114B2 (en) * | 2003-05-02 | 2006-10-03 | Becton, Dickinson And Company | Medical device having releasable retainer |
US20070123830A1 (en) * | 2005-11-29 | 2007-05-31 | Addino B.V. | Safety syringe |
DE102005062220B3 (en) * | 2005-12-20 | 2007-02-15 | Primojex Gmbh | System for needle-free or needle injection of fluid, e.g. medicament, comprises injection device connectable to needle attachment separable into cannula and adapter parts, allowing changing of needles |
US8012132B2 (en) * | 2009-02-24 | 2011-09-06 | Becton, Dickinson And Company | Luer-snap connection and luer-snap syringe |
US8915890B2 (en) | 2009-07-30 | 2014-12-23 | Becton, Dickinson And Company | Medical device assembly |
NZ600456A (en) * | 2009-11-11 | 2014-06-27 | Unitract Syringe Pty Ltd | Vaccination syringe |
EP2491971A1 (en) * | 2011-02-23 | 2012-08-29 | Sanofi-Aventis Deutschland GmbH | Needle adapter |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5188599A (en) * | 1989-07-11 | 1993-02-23 | Med-Design, Inc. | Retractable needle system |
EP0493456B1 (en) * | 1989-09-18 | 1996-01-10 | Robb Pascal Patent Pty. Ltd. | Syringe |
DE69218592T2 (en) * | 1991-04-17 | 1997-10-02 | Ryles | SYRINGE |
US5328475A (en) * | 1993-12-16 | 1994-07-12 | Chen Long Hsiung | Simplified safety syringe with retractable self-biased needle |
US5405327A (en) * | 1994-07-29 | 1995-04-11 | Chen; Long-Hsiung | Simplified safety syringe with retractable self-biased needle and minimized plunger |
-
2000
- 2000-12-19 US US09/738,997 patent/US6436076B1/en not_active Expired - Fee Related
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030153878A1 (en) * | 2002-02-08 | 2003-08-14 | Chin-Shu Huang | Safety syringe having needle holder capable of fixing secured and easy to drawback |
US6761707B2 (en) * | 2002-02-08 | 2004-07-13 | Taiject Medical Device Co., Ltd. | Safety syringe having needle holder capable of fixing secured and easy to drawback |
EP1369138A1 (en) * | 2002-06-03 | 2003-12-10 | Fu-Yu Hsu | Needle holder positioning structure for a safety syringe |
US20070135824A1 (en) * | 2005-12-09 | 2007-06-14 | O'brien Todd | Suture needle retention device |
US7763038B2 (en) * | 2005-12-09 | 2010-07-27 | O'brien Todd | Suture needle retention device |
Also Published As
Publication number | Publication date |
---|---|
US6436076B1 (en) | 2002-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6436076B1 (en) | Needle holder positioning structure for a safety syringe | |
US5263934A (en) | Stroke limiting syringe with retractable needle | |
US5201710A (en) | Syringe fitted with a clamping device for the needle and with means to enable the needle to be automatically retractable into the syringe body at the end of an injection | |
US6126644A (en) | Holder for a syringe and an injection device using the holder | |
US5431631A (en) | Safety syringe with externally connectable and internally retractable self-biased needle | |
EP1576977A1 (en) | Syringe with retractable needle | |
KR20090023543A (en) | Indwelling needle with wings | |
US5752936A (en) | Safety vacuum syringe with two opposite needles for blood sampling | |
US6752784B2 (en) | Labor efficient safety syringe | |
US20050240149A1 (en) | Self-destructive syringe | |
US7211064B2 (en) | Disposable syringe | |
EP1369138A1 (en) | Needle holder positioning structure for a safety syringe | |
US20030153877A1 (en) | Safety syringe of easy to pull out the plunger | |
WO2003041771A1 (en) | Injection needle retractable injector | |
HUT66838A (en) | Simplified safety syringe | |
US4630454A (en) | Device for holding interim crochet stitches against unravelling | |
AU781725B2 (en) | Needle holder positioning structure for a safety syringe | |
CA2388875A1 (en) | Needle holder positioning structure for a safety syringe | |
US20070250015A1 (en) | Safety syringe with a retractable needle hub | |
JP2003205035A (en) | Injection needle retractable injector | |
JP2766628B2 (en) | Syringe with externally attachable, internally retractable, self-tilting needle | |
US20030153878A1 (en) | Safety syringe having needle holder capable of fixing secured and easy to drawback | |
JPH11342200A (en) | Throw-away type injector | |
KR20030095558A (en) | Needle holder positioning structure for a safety syringe | |
JP2004016334A (en) | Injection needle shank positioning structure of safe injection needle cylinder |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20060820 |