JPH02502255A - Single-use disposable syringe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Single-use disposable syringe Technical field The present invention is a single-use disposable syringe, particularly having a fixed needle and a plunger in place. Locking requires cycling the plunger only once through interaction with the associated moving parts. The syringe can be reused by being equipped with a hard flute or disc that can Concerning a substantially rigid syringe that makes it impossible to use.

Background technology Standard disposable syringes are intended for single use but are constructed for reuse. ing. Accurate single use, destruction and disposal of syringes is generally done in a controlled environment We require strict compliance from the users below.

Disposable syringes should not be used in environments without proper controls, i.e. outside of hospitals or clinics. For example, for injecting illegal drugs or for injecting multiple people. Used syringes are in the hands of people who use them without proper sterilization during use. .

Diversion of used disposable syringes from legal sources for the administration of illegal and dangerous drugs. In addition, such syringes that are not properly sterilized can carry the HIV virus. virus) and hepatitis B, etc.

One method proposed to prevent reuse of syringes is to use self-destructive, collapsible syringes. Packaging drugs in single-dose containers, drug doses can be compressed and destroyed. Ru.

However, not all drugs are suitable for use in single dose delivery methods. be The drug is highly economical and desirable to disassemble into multiple dose containers. Therefore , these drugs can be delivered in single-use, disposable syringes or multiple-use, sterilizable syringes. It will be administered by

Conventional equipment to solve the problem of reusable syringes in one form or another No. 2,618,263, Lakso et al., Nov. 1952. There is a patent on the 18th of the month. This patent requires a pre-measurement into an ampoule adjacent to the inner end of the needle. Discloses the drugs used. This needle works by pressurizing the ampoule. enter the building and dispense drugs. The entire device is then discarded.

Cuun Ingham, U.S. Pat. No. 4.013, issued March 22, 1977. In No. 073, when the inside of a collapsible wall is pressurized from both walls and the drug is poured out, both walls collapse. Collapsible, single-use devices designed to lock together and make it impossible to reuse the device syringe is disclosed.

+Iilleman et al. U.S. Pat. No. 4.022.2, issued May 10, 1977. No. 06 is an apparatus for storing and dispensing lyophilized vaccines in single-dose prepackaging systems. However, there is no provision for a unit that cannot be reused.

Chiquiar-Arias U.S. Pat. No. 4.39, issued July 5, 1983. No. 1.273 is attached to the piston that enters the bottom wall of the cylinder at the end of the injection. A rigid type syringe with an attached bottle is disclosed. Also, this patent Advance the cylinder but recirculate the piston or reuse the syringe A knife for cutting the side wall of the cylinder is disclosed.

U.S. Patent No. 4.548.601, issued October 22, 1985, The inner and outer packaging parts are flexible so that the inner and outer packaging parts are destroyed by air pressure once the injection is completed. A pre-packaged pharmaceutical combination is disclosed.

Disclosure of invention The present invention relates to single-use syringes that are mechanically impossible to reuse.

The purpose of the present invention is to provide a single-use note that is simple in structure, inexpensive, and automatically prevents reuse. The aim is to provide a shooting weapon.

Another object of the invention is to provide a standard plastic disposable syringe plunger shaft. A single retraction movement that loads the syringe when placed on top and administers the drug Place the plunger in a position that allows for a single forward movement but prevents its use again. The object of the present invention is to provide an inexpensive locking flute or disc.

Another object of the invention is to provide an inexpensive means of eliminating syringes that fail after the first dose. It is about providing.

Another object of the invention is to prevent syringes of the same capacity from containing or conveying different quantities. To provide a means of reducing the need for off-sized syringes by preventing be.

Brief description of the drawing FIG. 4 is an illustration showing a typical syringe utilizing the present invention.

FIG. 2 shows a plunger/system with the single-use disc 0 of the present invention in place. FIG. 3 is an exploded perspective view of the cylinder assembly.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 1 showing the disc in a predetermined position before the syringe is used. Ru.

Figure 4 is a cross-sectional view similar to Figure 3 showing a syringe with a measuring tube containing a drug; It is.

Figure 5 shows the device with the cylinder locked at the end of the measuring tube after drug administration. FIG. 3 is a cross-sectional view similar to FIG. 3;

Figure 6 is a cross-sectional view of the plunger and disc to illustrate the interaction of the various elements. It is.

FIG. 7 is a plan view showing another embodiment of the disk of the present invention.

FIG. 8 is a partial view showing a second embodiment of the present invention in which a flute is installed within the syringe.

FIG. 9 is an elevational view of the flute of the present invention outside the syringe.

FIG. 10 is a bottom view of the flute of the invention shown in FIG. 8.

FIG. 11 is a partially sectional perspective view of the flute of FIGS. 8-10 in the operating position.

FIG. 12 shows a wire connected to the plunger body for achieving the object of the present invention. FIG. 2 is a perspective view of the device.

FIG. 13 is a view taken along line 13-13 in FIG. 12.

FIG. 14 is a side view of FIG. 12.

FIG. 15 is an explanatory diagram of another device that meets the purpose of the present invention, and FIG. FIG. 3 is a side view of the device.

BEST MODE FOR CARRYING OUT THE INVENTION As is clear from FIG. 1, the outer periphery of the main cylinder 2 facilitates drug administration. An upper disk portion 4 extending outwardly to serve as the external light end of the plunger as described below. Hard plastic injection with a cap 6 and a dosing element 8 protruding from the nose 7 Consists of vessels.

In FIG. 2, the cap 6 shown at the lower end is connected to the plunger 10. or integrated. The plunger 10 has a leg 12 and a cylindrical central connecting member 14. It has a generally X-shaped cross section. Piston member 16 includes a sealing element 18 , the opposite end of the plunger is connected to the cap 6.

In this figure, a part of the cylinder 2 and the disc of the present invention are located approximately in the middle of the plunger. 20. As detailed below, the disk 20 is connected to the cylindrical member 14. a central opening 22 for receiving the leg 12, a radial elongated hole 24 for receiving the leg 12, an outwardly projecting tip or has a dart portion 26. The internal elements 22 and 24 are connected to the plunger 10 and the sixth As is clear from the figure, the movement of these two consecutive elements in one direction is virtually without resistance. and movement in the opposite direction moves the disk 20 into the shaft of the cylinder. contact diagonally so as to embed it in the Similarly, the outwardly projecting dart portion or top portion 26 moves easily in one direction along the inner wall of cylinder 2, but with respect to movement in the opposite direction. Any attempt to do so will cause the dart 26 to collide with the inner wall of the cylinder 2.

The above-mentioned consistent behavior is achieved by using materials such as rigid stainless steel with memory. Use a plastic material for the syringe itself as well as for the above disc. It can be caused by The relative stiffness between two materials is It is possible to react to the relative movement of the two consecutive elements of the screen 20 and prevent further movement. prevent movement.

In FIG. 3, the device of the invention is shown in cross-section without a needle. here The syringe is empty and ready for use. The piston member 16 is attached to the nose 7. Adjacent, a disc 20 is set at a predetermined distance behind the cavity, and retraction to this point causes a predetermined amount of the administered drug to be introduced into the cylinder. There is. Since the dart 26 is locked to the inner wall of the cylinder, the ring moves backward. is prevented. However, the plunger is free to move in this direction.

The device of the present invention allows for easy adjustment of the syringe volume depending on the initial settings.

FIG. 4 shows the piston member 16 retracted into a position adjacent to the disc 20. 1 shows a syringe of the present invention having a syringe of the present invention. The cylinder is filled with drug and also has a disk 20 Its retreat is restricted by the cylinder 2, and its tip collides with the inner wall of the cylinder 2.

In FIG. 5, the drug is supplied into the syringe, and the plunger 10 is moved upward. Move the disc 20 to the frontmost position and move the piston 16 to the front of the cylinder 2. Lock it. The disk is advanced in cooperation with the plunger. After the plunger Attempts to withdraw cause the tip of the plate to collide with the inner wall of cylinder 2. Therefore, further movement in the opposite direction is restricted.

Next, FIG. 6 will be explained. In this figure, the disc according to the invention is a syringe. a plunger shaft 1 having an inner wall of a cylinder 2 and a leg and a cylindrical portion 14; It is shown fixed between 0 and 0. As is clear from this figure, the upper plane The upwardly protruding dart or top portion 26 which is the end portion of the surface portion 28 coincides with the bending line 29. , forming an upwardly projecting body element 30, the opposite side of which contacts the plunger member. ing.

Referring to FIG. 7, the disc of the present invention is shown in plan view, with tip elements 26, 28 Connected via arcuate elements 32 to reduce the weight of this ring and at the same time provide flexibility. increase. As can be seen from the right side of FIG. A ring is provided to facilitate assembly of the ring within the plunger.

Sections 8.9.10 and 11 are based on the invention using hard flutes instead of discs. Other aspects are shown. This embodiment simplifies assembly during or after manufacture of standard disposable syringes. Simply do it. This embodiment also uses the plug to draw fluid to a predetermined amount into the syringe. the plunger to extend and retract and to allow the plunger to eject fluid and to Similarly to the above, the object of the present invention to prevent the second expansion and contraction is achieved.

FIG. 9 shows a number in the form of a thin metal flute comprising legs 30.32 with a narrow body 34. FIG. 2 shows plan views of two embodiments. The leg continues to the bottom with a sharply reduced arch in the upper part Separated by slot 40.

FIG. 10 shows chisels 36 arranged at right angles to each other, flared outwards, and were sharp at their upper ends. FIG. 3 shows an end view of the flute showing the legs 30 and 32 having iron hooks 38 at the tip.

As is clear from FIGS. 8 and 11, each flute is located within the leg 12 of the plunger. , but the associated movement in the other direction actually collides with itself. The above plunger is In this way, the flute is moved into the cylinder and the piston 16 shown in Fig. 2 is further moved outward. This is prevented by causing the flute to collide with the side wall of the cylinder 2. injection During the process, the chisel of the flute 36 impinges on the plunger leg 12 and the plunger The flute moves down with the shutter shaft until it ejects. Then the flute Retraction of the plunger is prevented by iron hook means 380, which iron hook means is attached to the cylinder 2. Re-embed it into the side wall.

Referring to FIG. 12, further embodiments of the present invention are shown. This embodiment has a base member 50 The base member is generally in the form of a curved U-shaped wire, and the base member is located on the side of the plunger. forming a generally V-shape within the wall and having a pair of upwardly outwardly flaring arm members 52, each arm The arm member forms the tip of the chisel and is connected to the inner wall of the cylinder and the plan of the piston. When installed in place between the It works in the same way as a default.

Figures 15 and 16 further illustrate another embodiment of the invention, which forms a syringe. It is preferable that the plastic material be made of a harder plastic material than the stomach. Generally, this restraint device is used in the same manner as above and in a clover-shaped configuration. The cloverleaf arc is formed by a thin flexible band 60 with an integral reinforcing projection. The cross-cups are connected via a diamond-shaped engagement member 62 having an opening 64. Each projection has a triangular sidewall 66. The diamond engagement member 62 is attached to the plastic plate. Any bending moments that occur when moving the plunger relative to the side wall resist and push the tip of the diamond engagement member 62 into the cylinder and/or the Collision against the inner wall of the plunger.

As mentioned above, the present invention modifies a standard single-use syringe so that it can be used only once. provide an inexpensive way to Further, the use of the present invention allows a syringe of predetermined dimensions to be inserted into the device described above. It is useful to limit the administration of different volumes by changing the position of the.

FIG. IQ international search report -h--＾--+w--5PCT/υS 8710240B International Search Report υS 8702408 S^　19072

Claims (8)

[Claims] 1. an elongated hollow cylindrical body, a plunger hand axially movably mounted within the body; a stage, nozzle means closing one end of the body, and closing the body at the opposite end of the nozzle means; a rod means integral with the plunger means extending upright and mounted within the body; a controller that allows one complete circulation of the plunger and limits further movement. A single-use disposable syringe characterized in that it consists of a troll means. 2. The syringe of claim 1, wherein said nozzle means is a syringe needle. 3. The control means is installed on the plunger and is related only in one direction. Elasticity that allows movement and contacts the interior of the fuselage to allow associated movement in only one direction. The syringe of claim 1, comprising a disc or flute. 4. A device for use with plastic syringes that can selectively adjust the volume, , an insert provided between the plunger and the side wall of a standard syringe; is made of a harder material than that of the syringe and when in place Preventing the plunger from elongating and ensuring proper placement of the insert determines the volume of the syringe. A device that has a shape that allows it to be 5. 5. The device of claim 4, wherein the insert is in the form of a flute. 6. 5. The device of claim 4, wherein the insert is in the form of a bent wire. 7. 5. The device of claim 4, wherein the insert is in the form of a disc. 8. the insert is in the form of a plurality of interconnected diamond-shaped devices; 5. The device of claim 4.