CN1057006A

CN1057006A - Automatically make the syringe of subcutaneous injection needle harmless after use

Info

Publication number: CN1057006A
Application number: CN 90104069
Authority: CN
Inventors: 佳泰诺·南西; 卡尔拉·南西
Original assignee: GAETANO NACCI AND CARLA NACCI NEE TAGLIAFERRI; GAETANO NACCI AND CARLA NACCI
Current assignee: GAETANO NACCI AND CARLA NACCI NEE TAGLIAFERRI; GAETANO NACCI AND CARLA NACCI
Priority date: 1990-06-02
Filing date: 1990-06-02
Publication date: 1991-12-18
Anticipated expiration: 2005-06-02
Also published as: CN1030688C

Abstract

The objective of the invention is to eliminate that hypodermic syringe damages is dangerous and in fact they can only be used once.According to the present invention, entry needle (a) (referred to herein as the stylet of perforation) has the uncinus (k) of a concavity; The piston rod that a hydrostatic column (m) inserts syringe coaxially (v), and can be connected with entry needle (a) with cylindrical coil expander (q) with a protruding clasp joint formula clamp (n) and supporting mass (o) thereof.

Description

Automatically make the syringe of subcutaneous injection needle harmless after use

The present invention relates to a kind of machinery that is connected with piston that is used for syringe, hypodermic needle after the use automatically of this syringe does not damage, and said machinery can be eliminated the danger that damages and hypodermic syringe can not be used again.

Be referred to as nonrecoverable syringe on the current market and have only a faint protector, and user can be ignored warning and the repeatedly use of writing " can only use once " in the face of unexpected injury.

Also be not enough to protection even insert a medicated cap,, stay the entry needle of exposure, and may damage, also can constitute the dangerous or harm of potential injury even put the pin medicated cap because all unquestionable meeting of the reason of anything unexpected causes it to throw off.More well-known inventions are that whole syringe is changed, and rely on user and finish, and they want to be designed to protect syringe in a kind of definite mode.

Such one type syringe is arranged, use the back by operator's operated piston entry needle to be withdrawn in the needle tubing, this operation is required great effort, and is automatic in no instance.Entry needle keeps floating in needle tubing, and short of people mobile piston from cylinder exposes pin, and it just can not injure anyone.The type that has relates to the complex operations that entry needle is not exposed and keep sealing, yet, always to change and improve whole syringe construction.From the viewpoint of industry, the viewpoint of user, and complicated usability and unimpeachable safety, these systems all relate to innovation all sidedly and all adjust frame for movement.

Main purpose of the present invention is on the basis that keeps the form do not change traditional syringe and use, provide and be beneficial to the probability that commercial production just increases the syringe of cost slightly, so that allow user realize injection by operational approach in the past, and guarantee that syringe can unexpectedly not stab self and other people after usefulness, perhaps reuse in any occasion.

Above-mentioned purpose is realized by syringe of the present invention, this syringe comprises a cylinder, the piston that can in said cylinder, slide, a hollow entry needle, it is characterized in that: said entry needle has the uncinus of a spill, in said piston, insert a hydrostatic column coaxially, this container comprises a clasp joint clamp that has the protrusion of supporting mass, this supporting mass is operably connected on the pulling force helical spring that is fixed on hydrostatic column, and described clamp is operably connected on the said spill uncinus, so that said entry needle is retracted and takes at said hydrostatic column.

In most preferred embodiment, said syringe comprises the hydrostatic column of a both ends open, it is inserted in the intracavity that exists in the usually said piston rod coaxially, flange in its head has the groove of a medicated cap that can be contained in said piston, said hollow stylet or entry needle have a recessed uncinus, the seal washer that entry needle is passed in the base supports slidably and is connected on the said cylinder with the device that can cut off, the pulling force helical spring is contained in the said hydrostatic column in user mode with extending, and be fixed on the bottom of hydrostatic column with a connecting device, the other end of spring links to each other with the supporting mass that clamp is housed, the dowel fixes of the material system that said supporting mass can be cut off by a usefulness at least is to said hydrostatic column, in use, said clamp and supporting mass thereof are inserted between the top and the groove in the said medicated cap of said hydrostatic column, and said groove closes with the cap seal of the material system that is easy to bore a hole.Utilizing clamp to make under the situation that entry needle returns automatically,, allow all liq discharge by entry needle facing to the cylinder pushing piston.This automatic operation is contained in the stylet hollow in the syringe or the mode of entry needle, and than realizing that by medical personnel and user oneself danger is littler and more simple, for example they need to plug protective sleeve themselves at present, to protect themselves and others.

Consider the medicine hobby person's of outdoor use syringe miserable situation, they can be for last drops physic liquor being expelled in the own body and the piston of push injection device up hill and dale, this is certain to priming mechanism of the present invention, thereby entry needle is withdrawn in the cylinder, makes the syringe can not reuse.Therefore, these user can abandon exhausted syringe naturally undoubtedly.

Other advantage of the present invention is that structure and assembling are all very simple, and cost only has increase slightly than general syringe, keeps and uses the consistent impression of conventional syringe, guarantee that successfully syringe only uses once after, entry needle for good and all no longer exposes.

These advantages, improvement and functional character by below in conjunction with the explanation of accompanying drawing 1-9 to an embodiment (being not limited thereto), will have further understanding for the technical staff of this professional skill field to the present invention.

Fig. 1 to shown in Figure 5 be some parts according to syringe of the present invention;

Fig. 6 represents the syringe that is ready to use;

Syringe when Fig. 7 represents the entry needle withdrawal;

Fig. 8 is illustrated in the entry needle under the user mode and almost is in the enlarged drawing of the piston of stroke terminal;

Fig. 9 represents that clamp and entry needle hook the situation of moment.

Among the figure, letter (a) hollow stylet of expression or entry needle, (k) be the spill uncinus, (c) base of the hollow stylet of expression, (b) being the cervical region of syringe, (d) is seal washer (preferably seeing Fig. 8), (w) is plastic diaphragms, it is fixed to entry needle (a) on the cylinder (u), and can be broken by predetermined pulling force.

Letter (e) expression piston rod (medicated cap v), and a lid that is easy to pierce through (f) is arranged on the crown of center, medicated cap (e) can be made by elasticity (spring) material; (g) being hole or the groove that entangles clasp joint formula clamp (n), (h) is the groove for flange (i) insertion of hydrostatic column (m).

The enough length of hydrostatic column (m) is so that pass piston rod (v) and expose, so that flange (i) firmly inserts in the groove (h) of medicated cap (e).Hydrostatic column (m) has two holes on its wall, in order to pack into by two pins (l) of easily cutting off material system, these two pins are inserted in the ad hoc groove (p) of supporting mass (o), so that it is fixed in the same container (m).

The protruding clasp joint formula clamp with supporting mass (o) one represented in letter (n), (q) is on the supporting structure (o) that is contained in clamp (n) and the spiral stretching spring on the connecting device (r).Other clamp (z, x) is separately positioned on the outside (Fig. 2) of the cervical region (b) of pedestal (c) inboard and cylinder (u), they can make same pedestal (c) keep stable, and keep entry needle (a) and its uncinus (k) to be in correct position.

Utilization acts on the piston rod (elasticity of final pressure of v) going up and crown (e), clamp (n) can stretch out along the center of medicated cap, penetrate the water sealed layer that constitutes by the lid that pierces through (f) that is covered with hole (g), so that discharging whole liquid from needle tubing when, clamp (n) can for good and all be hooked in the hollow uncinus (k) of perforation lanes pin or entry needle (a).

After plastic diaphragms (w) disconnected, the metal stylet of perforation or entry needle (a) can slide in base (c) with in the watertightness seal washer (d) that is connected or welded on the base (c), and in the cervical region of retraction hypodermic syringe (b).

Above-mentioned pressure will be inserted in hydrostatic column (m) and be connected between the supporting mass (o) of the clamp (n) on the extension spring (q) and constitute the pin (l) that connects, made by easy shearing material therebetween and cut off (supporting mass (o) is arranged on Connection Block device (r) with respect to hydrostatic column (m) opposite side).

Spring (q) is in case discharge, just pull open plastic diaphragms (w), it will be withdrawn in the cylindrical container (m) tightly, meanwhile the supporting mass (o) of clasp joint clamp (n) will insert in the hollow uncinus (k) of the stylet (a) of boring a hole, then also pin (a) is drawn in the hydrostatic column (m), make it for good and all do not have the injury and can not reuse.

In fact, above-mentioned implementation detail can be come change with the layout of the method that is equal to, form, parts or order and employed material property, and these can not exceed design of the present invention and protection domain.

Claims

1, a kind of syringe that hypodermic needle is not damaged, comprise a cylinder (u), the piston that can slide in said cylinder (v), the entry needle that can bore a hole or stylet (a), it is characterized in that: said entry needle (a) has the uncinus (k) of a spill, at said piston (v), inserted a hydrostatic column (m) coaxially, this container holds the have supporting mass clasp joint formula clamp (n) of protrusion of (o), this supporting mass is operably connected on the pulling force helical spring (q) that is fixed on hydrostatic column (m), and described clamp is operably connected on the said recessed uncinus (k), so that said syringe is retracted and takes in the said hydrostatic column (m).

2, require 1 described syringe according to power power, it is characterized in that: said hydrostatic column (m) is at both ends open, this hydrostatic column is inserted in the piston (intracavity that is obtained in the piston rod v) coaxially, and the head of hydrostatic column has can be contained in the said piston (flange (i) in the groove (h) of medicated cap v) (e), the entry needle of said perforation or stylet (a) have a recessed uncinus (k), it is supported slidably by the seal washer (d) on base (c), and be connected on the said cylinder (u) with the device that can cut off (w), said pulling force helical spring (q) is contained in the said hydrostatic column (m) when user mode with extending, and be fixed on the bottom of hydrostatic column with a connecting device (r), the other end of spring (q) is connected on the supporting mass (o) of said clamp (n), said supporting mass is fixed on the said hydrostatic column (m) with at least one pin by the material system that can cut off (l), in user mode, said clamp (n) and supporting mass (o) thereof are inserted between the groove (g) in said hydrostatic column (m) top and the said medicated cap (e), and said groove (g) is lid (f) sealing of being made by the material that is easy to bore a hole.

3, according to the described syringe of claim 2, it is characterized in that: the head of said medicated cap (e) has competent elasticity, promote piston (v) the time with box lunch to the roof of cylinder (u), it is deformed, thereby make clamp (n) pass the said lid that is easy to bore a hole (f) and in the recessed uncinus (k) that is inserted into entry needle (a).

4, according to the described syringe of claim 2, it is characterized in that: the base of said entry needle (c) comprises a seal washer (d), yet when entry needle was contracted, it can make same entry needle slide.

5, according to the described entry needle of claim 2, it is characterized in that: said at least one pin that can bore a hole (l) inserts through hydrostatic column (m) in the respective grooves (p) of supporting mass (o) of said clamp (n), this pin (l) can be cut off by the final pressure that acts on the piston rod, thereby entry needle (a) is bounced back with clamp (n) and supporting mass (o) thereof and the spring (q) that shrinks and takes in the hydrostatic column (m).