WO1996015820A1 - Injecteur - Google Patents

Injecteur Download PDF

Info

Publication number
WO1996015820A1
WO1996015820A1 PCT/JP1995/000825 JP9500825W WO9615820A1 WO 1996015820 A1 WO1996015820 A1 WO 1996015820A1 JP 9500825 W JP9500825 W JP 9500825W WO 9615820 A1 WO9615820 A1 WO 9615820A1
Authority
WO
WIPO (PCT)
Prior art keywords
syringe
hub
small
diameter
plunger
Prior art date
Application number
PCT/JP1995/000825
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Hirota
Original Assignee
Tokita, Hiroshi
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
Application filed by Tokita, Hiroshi filed Critical Tokita, Hiroshi
Priority to AU23521/95A priority Critical patent/AU2352195A/en
Publication of WO1996015820A1 publication Critical patent/WO1996015820A1/fr

Links

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    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston

Definitions

  • the present invention relates to a syringe mainly used for medical use.
  • the present invention has been made in view of the above-described circumstances, and has been made with a view to providing a syringe that can eliminate these disadvantages.
  • a cylindrical syringe, and a syringe that can be freely inserted into and retracted from the syringe A plunger to be inserted, a hub into which the needle is physically incorporated, and a hub which is inserted into a small-diameter cylindrical portion formed at the distal end of the syringe.
  • the hub and the plunger are integrated by inserting into and engaging with the engaging recess provided in the housing, and the hub is housed in the syringe together with the needle in conjunction with pulling out the plunger from the syringe.
  • a small-diameter locking step portion is provided on the outer peripheral surface of the hub, while the syringe small-diameter cylindrical portion is Is locked to the locking step And a staff i is provided to prevent the hub from tipping.
  • the injection needle can be housed in the syringe by this configuration, but the syringe can be stored without increasing the number of parts.
  • the syringe needle can be attached to and detached from the device.
  • FIG. 1 is a cross-sectional view of the syringe
  • Fig. 2 is a cutaway section of the syringe showing the state before the engagement projection is forced into the engagement recess
  • Fig. 3 is the engagement of the engagement projection into the engagement recess.
  • FIG. 4 is a cross-sectional view of the syringe showing a state in which the hub is housed in the syringe.
  • FIG. 4 is a partial cross-sectional view of the syringe showing a state in which the hub is assembled.
  • FIG. 6 is a view of the syringe.
  • : 8 is a side view of the hub
  • FIG. 10 is a partial cross-sectional view of a syringe showing a cap mounted state of the second embodiment.
  • FIG. 10 is a partial cross-sectional view of a syringe showing a cap mounted state of the third embodiment.
  • FIG. It is a perspective view which shows the syringe of 4th Example.
  • reference numeral 1 denotes a syringe
  • a syringe 2 into which a drug solution of the syringe 1 is injected is made of a thermoplastic resin material such as polypropylene and is integrally formed in a cylindrical shape, and is injected with the drug solution.
  • a large-diameter cylindrical portion 2a and a small-diameter cylindrical portion 2b formed at the distal end thereof via an inclined cylindrical portion 2c are formed concentrically.
  • a support piece 2d for supporting a finger when using the syringe 1 is formed on the base end side of the large-diameter cylindrical portion 2a so as to protrude in a flange shape in an outer diameter direction.
  • a convex ridge 2e which protrudes toward the core side is formed in a ring shape.
  • the small-diameter cylindrical portion 2b includes: As will be described later, a hub 4 into which the injection needle 3 is physically incorporated is inserted and inserted from the distal end side of the small-diameter cylindrical portion 2b.
  • the tip of the small-diameter cylindrical portion 2b is formed into a slit 2j with a predetermined width in the circumferential direction, and is divided into a plurality (in the present embodiment, divided into four at the same intervals).
  • a crack 2 g is formed on the inner peripheral surface of the tip of the crack 2 ⁇ .
  • the tapered insertion guide surface 2h is formed so as to gradually project from the distal end toward the proximal end toward the inner diameter side.
  • an arc-shaped ridge 2i projecting in the axial direction is formed in a ring shape:
  • the hub 4 which is inserted into the small-diameter cylindrical portion 2b from the distal end side, is formed using a thermoplastic resin material such as polyethylene.
  • a through-hole 4 a for supporting through-hole is formed so as to penetrate from the base end to the tip.
  • the hub 4 has a large-diameter portion 4b whose base end ⁇ has the same outer diameter as the inner diameter of the small-diameter cylindrical portion 2b, and a smaller-diameter portion 4 whose distal end has a smaller diameter.
  • c and a locking step portion 4d formed between the two diameter portions 4b and 4c.
  • the base end portion that is, the large-diameter portion 4b is pushed into the small-diameter tube portion 2b with the large-diameter portion 4b pressed against the hub large-diameter portion 4b.
  • the base end is pressed against the insertion guide surface 2 h of the dovetail 2 g, whereby the tip crack 2 f is elastically deformed and spreads to the outer diameter side.
  • the hub 4 is smoothly inserted into the small-diameter cylinder 32b, and the hub 4 is set by pushing the hub 4 until the engaging claw 2g is engaged with the locking step ⁇ 4d.
  • the tip of the hub 4 is set so that it can be attached to the tip ⁇ of the hub 4 in a state where it cannot be pulled out.
  • the small groove 2 e is formed on the inner peripheral surface of the small-diameter cylindrical part 2D.
  • the hub thereby It is set to ensure watertightness between the ridge and the syringe 2.
  • the two grooves between the ridge 2i and the ridge 2i are formed by forming the concave groove 4e into a V-shaped groove. A contact portion is formed.
  • the base end of the through hole 4a formed in the hub 4 is formed in a dovetail shape in which the end of the hole has a small diameter and the back side of the hole has a large diameter. d is forcibly inserted, but the inner part of the hole is formed by a through-hole 4 f penetrating the large-diameter part 4 b in the radial direction. 4 g.
  • reference numeral 5 denotes a plunger which can be inserted into and retracted from the syringe 2.
  • the plunger 5 is formed of a thermoplastic resin material such as polyethylene or the like.
  • a and a disk portion 5b formed integrally with the distal end portion of the spindle portion 5a in a state having the same diameter as the inner diameter of the large-diameter cylindrical portion 2a of the syringe 2;
  • a damper retaining portion 5c for retaining the damper 6 for securing water tightness with the syringe 2 is provided on the tip side surface of the disk portion 5b, and the damper retaining portion 5c is further provided.
  • the knob 4 is forcibly inserted into the syringe 2, and the injection needle 3 is stored in the syringe 2.
  • the tip surface of the damper 6 has an inclined surface that is gentler than the inclination of the syringe inclined cylinder 2c: At the end of the injection, as shown in FIG. It is set so that the outer peripheral portion of the damper S before the 5d is forcibly fitted into the engagement recess 4g can be pressed against the inclined cylindrical portion 2c in a resilient manner.
  • a notch 4 h is formed at the end of the hole of the engaging concave portion 4 L: formed in the hub 4 for communicating the deep portion of the hole and the syringe 2.
  • the spindles 5a and 6 of the plunger 5 have cutouts ".e” formed at positions exposed from the syringe 2 when the syringe needle 3 is pulled out to a state where it is housed in the syringe 2; After the syringe needle 3 is accommodated in the syringe 2, the plunger 5 is cut out so that the plunger 5 can be bent at the position 5 e: 5 f is located at the base end of the support shaft ⁇ a. It is a flange-shaped pressing piece integrally formed.
  • Reference numeral 7 denotes a tube which is integrally formed of a thermoplastic resin such as polypropylene and is detachably attached to an outer peripheral portion of the hub 4 to cover the injection needle 3. Meanwhile r locking projection 7 h have been made form the the inner peripheral surface of Natsuta base end portion 7 a large ⁇ , the outer peripheral surface of the hub the small diameter portion 4 c is the engagement recess 4 i the shape The formed rib 4j is formed corresponding to the slit 2j, and the cap 7 is moved to a position where the locking projection 7b comes into contact with the locking recess 4i.
  • a thermoplastic resin such as polypropylene
  • the syringe 1 is capable of storing the injection needle 3 in the syringe 2 by integrating the plunger 5 and the hub 4 as described above after the injection is completed.
  • the hub 4 in which the injection needle 3 is physically incorporated for injection is incorporated into the syringe 2
  • the hub 4 is assembled from the distal end side of the syringe 2, not from the proximal end side.
  • the insertion and assembling is performed by pushing the large-diameter hub portion 4 b from the distal end of the small-diameter cylindrical portion 2 b of the syringe, and thus preventing the hub 4 inserted and assembled from the distal end from the distal end.
  • the locking is performed by locking the 2 g to the locking step 4 d.
  • the insertion work of the hub 4 is facilitated by the guidance by the tapered insertion surface 2h formed at the tip of the front cracked portion 4f. Can be done.
  • the hub 4 is assembled to the syringe 2 while the cap 7 is still attached, but in the second case, the hub 4 is engaged with the locking projection 7. Since the movement to the back of the cap is restricted by contacting the recess 4 g, the load at the time of mounting the hub moves the hub 4 to the back of the cap; 7 Do not protrude from the tip side
  • a dovetail-shaped engaging recess 4 g is formed in the hub 4 formed by molding, and the large-diameter hole of the engaging recess 4 g has a hub large diameter. Because it is formed by a through hole 4 f penetrating the portion 4 b in the radial direction. It is not necessary to make the mold for forming the deep portion of the hole into a reverse tapered state. It is ensured that the hole end of the engagement concave portion 4 g does not expand and the function of preventing the engagement with the engagement protrusion 5 d from being impaired is impaired.
  • the? A notch 4 h is formed to allow the inner part of the syringe 2 to communicate with the inner part. Therefore, when the ⁇ joint ⁇ 5 d is forcibly fitted to the engagement recess 4 g , the engagement projection 5 But the engagement recess 4 g? Deeply penetrates into the engagement recess 4 g while closing the communication hole 4 a communicating at the back t.
  • the projection 5d can be easily fitted: it is needless to say that the present invention is not limited to the above-mentioned embodiment.
  • the hub small-diameter portion 4c. May be free of ribs.
  • the rib 4j provided on the hub small-diameter portion 4c is provided with a carrier.
  • This function is also used to support Sop 7), so this function can be provided only on the cap 7 side.That is, the hub 4 (7; the small diameter portion 4c and the large diameter portion 4b)
  • the locking rib portion 7 (: which is formed on the interlocking step i) is formed, but a certain i is a hub small diameter portion 4 as shown in FIG. ⁇ stop at the tip of c
  • the hub ( There is no need to assemble, and the operation of measuring the hub is simplified. This is because the slit formed in the small-diameter cylindrical portion 2b of the syringe does not require a gap to avoid ribs as in the first and second embodiments. As in the fourth embodiment shown in FIG. 2, a cut with a depth of about 2 k is sufficient.
  • the slit may be any as long as the syringe small-diameter cylindrical portion expands when the hub is forcibly fitted. For this reason, the number, size, and the like may be appropriately set as necessary. Of course, it is not limited to the above embodiment.
  • the used syringe is drawn into the syringe with the hub integrated with the plunger, and the syringe needle can be stored in the syringe.
  • the locking of the small-diameter cylindrical portion of the syringe is stopped by the locking step of the hub.
  • H The hook is pulled out toward the tip of the hub. Therefore, the operation of assembling the hub into the syringe is simplified, and it is not necessary to use a special retaining member as in the past to prevent the hub from being detached. As a result, the number of parts is minimized. In spite of this, it is possible to select the needle itself and inventory management is easy:

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Cette invention se rapporte à un injecteur, dont l'aiguille est rangée dans la seringue après utilisation, un manchon d'aiguille étant conçu comme faisant partie intégrante dudit injecteur, l'aiguille pouvant être montée du côté de l'extrémité en pointe de la seringue. Cet injecteur est construit pour qu'une partie fendue (2f), comportant des fentes (2g), est formée sur une extrémité en pointe d'une partie de petit diamètre de la seringue (2), dans laquelle est adapté le manchon d'aiguille (4); des crochets d'engagement (2g) sont formés sur une extrémité en pointe de la partie fendue (2f); et un gradin d'engagement (4d) est prévu sur une surface périphérique externe du manchon d'aiguille (4), lequel, après introduction avec son extrémité pointue la première, est empêché d'atteindre le côté de l'extrémité en pointe de la seringue (2) grâce au gradin d'engagement (4d) qui vient s'engager dans les crochets d'engagement (2g) en raison d'une déformation élastique de la partie (2f).
PCT/JP1995/000825 1994-11-22 1995-04-26 Injecteur WO1996015820A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23521/95A AU2352195A (en) 1994-11-22 1995-04-26 Injector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6312791A JPH08141082A (ja) 1994-11-22 1994-11-22 注射器
JP6/312791 1994-11-22

Publications (1)

Publication Number Publication Date
WO1996015820A1 true WO1996015820A1 (fr) 1996-05-30

Family

ID=18033454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1995/000825 WO1996015820A1 (fr) 1994-11-22 1995-04-26 Injecteur

Country Status (3)

Country Link
JP (1) JPH08141082A (fr)
AU (1) AU2352195A (fr)
WO (1) WO1996015820A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818209A1 (fr) * 1995-08-22 1998-01-14 Long-Hsiung Chen Seringue hypodermique de sécurité pour petits dosages
EP0818210A1 (fr) * 1996-07-10 1998-01-14 Long-Hsiung Chen Seringue de sécurité à aiguille rétractable et précontrainte pour injections intraveineuses sans bague de blocage
EP0818211A1 (fr) * 1996-07-10 1998-01-14 Long-Hsiung Chen Seringue de sécurité à aiguille rétractable et précontrainte et à piston, simplifiés
EP0824924A1 (fr) * 1996-08-21 1998-02-25 Long-Hsiung Chen Seringue hypodermique de sécurité
US6196997B1 (en) 1997-04-25 2001-03-06 Yoshikuni Saito Syringe
US6536534B1 (en) 1998-01-09 2003-03-25 Marioff Corporation Oy Holder for mounting a spray head
GB2387116A (en) * 2002-04-05 2003-10-08 Wu-Shun Huang Safety syringe
EP1429828B1 (fr) * 2001-09-26 2009-01-14 B. Braun Melsungen Ag Bride de securite a ressort pour aiguille

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000245840A (ja) 1999-03-03 2000-09-12 Mitsubishi Pencil Co Ltd 注射針
JP5936814B2 (ja) * 2010-10-21 2016-06-22 株式会社吉野工業所 注射器の針カバー
JP6573761B2 (ja) * 2015-01-06 2019-09-11 小林製薬株式会社 押出器具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05502186A (ja) * 1990-10-04 1993-04-22 リトラックス・インコーポレーテッド リトラクタブル注射器
JPH0657358U (ja) * 1993-01-12 1994-08-09 永豊 洪 ディスポーザブル注射器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05502186A (ja) * 1990-10-04 1993-04-22 リトラックス・インコーポレーテッド リトラクタブル注射器
JPH0657358U (ja) * 1993-01-12 1994-08-09 永豊 洪 ディスポーザブル注射器

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0818209A1 (fr) * 1995-08-22 1998-01-14 Long-Hsiung Chen Seringue hypodermique de sécurité pour petits dosages
EP0818210A1 (fr) * 1996-07-10 1998-01-14 Long-Hsiung Chen Seringue de sécurité à aiguille rétractable et précontrainte pour injections intraveineuses sans bague de blocage
EP0818211A1 (fr) * 1996-07-10 1998-01-14 Long-Hsiung Chen Seringue de sécurité à aiguille rétractable et précontrainte et à piston, simplifiés
EP0824924A1 (fr) * 1996-08-21 1998-02-25 Long-Hsiung Chen Seringue hypodermique de sécurité
US6196997B1 (en) 1997-04-25 2001-03-06 Yoshikuni Saito Syringe
US6536534B1 (en) 1998-01-09 2003-03-25 Marioff Corporation Oy Holder for mounting a spray head
EP1429828B1 (fr) * 2001-09-26 2009-01-14 B. Braun Melsungen Ag Bride de securite a ressort pour aiguille
GB2387116A (en) * 2002-04-05 2003-10-08 Wu-Shun Huang Safety syringe

Also Published As

Publication number Publication date
JPH08141082A (ja) 1996-06-04
AU2352195A (en) 1996-06-17

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