JP3113450U - Disposable safety syringe - Google Patents

Abstract

Disclosed is a disposable safety syringe capable of pulling a needle base into a syringe barrel by a simple operation and storing it at an angle.
A disposable safety syringe including a needle base, a joint portion, a syringe barrel, and a plunger, the joint portion being fixed to a front end portion of the syringe barrel, and a needle base. Is an exterior type or an interior type, and is fitted on the front end surface of the joint portion 20, and a pivot piece 24 is provided on the rear end surface 23 of the joint portion 20. Then, the connecting piece 25 becomes the pivot of the pivot piece 24, and the pivot piece 24 can be bonded to the rear end surface 23 of the joint portion 20, or the pivot piece 24 can be opened with the connection piece 25 as the pivot. After completion of the injection, the fitting base 45 of the front end surface 42 of the plunger 40 is passed through the through hole 26 of the joint portion 20, the hook portion 44 is engaged, and the needle 40 is pulled diagonally and safely. It can be accommodated in the syringe barrel 30.
[Selection] Figure 14

Description

  The present invention relates to a disposable safety syringe, and more particularly, to a disposable safety syringe capable of pulling a needle base into a syringe barrel by a simple operation after completing injection and simultaneously storing it at an angle.

Syringes are medical devices that are used in large quantities, mainly composed of needle bases, syringe barrels and plungers, etc., and are generally discarded after use in consideration of hygiene and safety. Various designs have been made. There is a design that destroys the injection needle and the piston with a plunger after being drawn into the container (for example, Patent Document 1).
In general, syringes are classified into an external type and an internal type, and the external type needle base is a needle base that is fitted outside the head end of the syringe barrel. The needle base can be changed easily according to the internal needle base. Insert the needle base from the syringe barrel tail end opening (plunger insertion end) and push it to the top of the syringe barrel to fix it, exposing the syringe needle to the outside. However, it is impossible or difficult to change the needle base during use.
The structure of disposable safety syringes according to the prior art is complicated and disadvantageous for mass production, and it affects the simplicity of the destruction operation after use, such as drawing the needle base into the syringe barrel or breaking the injection needle. The needle base used is usually limited to either the exterior type or the interior type, and cannot be used in common, increasing the manufacturing cost.
JP-A-8-168529

The main purpose of the present invention is composed of a needle base, a joint, a syringe barrel, and a plunger, and the joint is installed at the front end inside the syringe barrel to form a stop end for the chemical solution. A tube body is provided on the front end face, and a needle base is fitted therein. A pivot piece having an appropriate thickness is integrally provided on the rear end face, and there is no side between the pivot piece and the joint body. Connected by the connecting piece at the edge, the connecting piece becomes a pivot, and the pivot piece can be attached to the rear end face of the joint or opened, and a circular penetration with an appropriate diameter is provided at the center of the pivot piece. A hole is provided, and a convex column corresponding to the through hole in the center of the pivot piece is provided on the front end surface of the plunger, and a fitting cone provided with a hook portion is provided on the upper end of the convex column. The jar can be pushed further to allow the fitting cone to enter the through hole and engage the hook with the through hole. When pulled, the pivot piece separates from the rear end surface and is in an inclined state first. Further, the connecting piece can be moved from one side to the rear side by the connecting piece to be pulled back into the syringe barrel. An object of the present invention is to provide a single-use safety syringe that is safe because the part and the needle base are accommodated obliquely inside the syringe barrel.
Another object of the present invention is a structure in which the joint is pushed into the front end inside the syringe barrel and fixed, and a tubular body is provided on the front end face of the joint so that the needle base is fitted. Accordingly, it is an object of the present invention to provide a disposable safety syringe in which the joint portion can correspond to an exterior type and an interior type needle base, and the convenience and use range of the safety syringe can be expanded.

  In order to solve the above-mentioned problem, the device of claim 1 is a disposable safety syringe including a needle base, a joint, a syringe barrel, and a plunger, and the needle base includes an injection needle and a base. The base is fitted on the annular support on the front end surface of the joint, and the joint is fixed to the front end inside the syringe barrel and is integrally molded with a flow path inside. An annular support base having a small diameter is formed, a needle base is fitted, one or more annular grooves are formed on the outer peripheral surface, a gasket is fitted, and an appropriate thickness is formed on the rear end surface. The pivot piece is connected to the rear end surface of the joint using the connection piece at the edge thereof, and the pivot piece pivot is formed on the connection piece. Can be pasted to the rear end of the joint, or the connection piece can be opened as a pivot. The plunger is reciprocated in the syringe barrel, an annular groove is provided on the outer edge surface of the front end portion, a gasket is fitted, and the front end is A convex column corresponding to the through hole in the center of the pivot piece is provided on the surface, the convex column has an appropriate height, a fitting cone provided with a hook portion is provided at the upper end, and the plunger is When the fitting cone on the convex column reaches the through hole by being pushed forward, the plunger can be further pushed in so that the fitting cone can enter the through hole, and the hook portion is engaged with the through hole. Thus, when the plunger is pulled, the pivot piece is separated from the rear end surface to be inclined first, and the connecting portion and the upper needle base are moved to the rear portion by the connecting piece and pulled into the syringe barrel. It is a disposable safety syringe characterized by being capable of.

  In the invention of claim 2, the needle base is first fitted on the annular support on the front end surface of the joint, and then inserted into the syringe barrel from the rear end port of the syringe barrel, and the joint portion is a front end portion inside the syringe barrel. 2. The disposable safety syringe according to claim 1, wherein the injection needle is exposed to the outside of the front end opening of the syringe barrel when positioned in the position.

  According to the third aspect of the present invention, the joint portion is inserted into the inside from the rear end port of the syringe barrel and is pushed into the front end portion inside the syringe barrel and fixed, and the needle base is tubular from the front end port of the syringe barrel to the front end surface of the joint portion. 2. The disposable safety syringe according to claim 1, wherein the disposable safety syringe is fitted to the support base and the injection needle is exposed to the outside of the front end opening of the syringe barrel.

  The invention of claim 4 is characterized in that when the pivot piece is bonded onto the rear end surface of the joint, it is best that the outer surface of the pivot piece and the rear end surface form a flat surface. The disposable safety syringe according to Item 1.

  According to the disposable safety syringe of the present invention, the front end surface of the plunger is provided with a convex column corresponding to the through-hole, and the upper end thereof is provided with a fitting cone provided with a hook portion. When it is pushed and the fitting cone reaches the through-hole of the pivot piece and the injection is completed and the pre-disposal of the syringe is performed, the plunger is further pushed in and the fitting cone is further advanced into the through-hole to hook. When the plunger is pulled by allowing the hook part to fully penetrate the through hole and then the hook part being engaged with the through hole, the pivot piece is separated from the rear end surface and is first inclined, and the connection piece The joint portion and the needle base can be moved rearward to be drawn into the syringe barrel, and the syringe needle can be prevented from being exposed to the outside. At this time, the plunger can be cut by the cutting portion provided in the plunger rod, and the plunger can be prevented from being exposed again by being pushed again.

A preferred embodiment of the disposable safety syringe of the present invention will be described with reference to the drawings.
As shown in FIGS. 1, 2, 3, and 4, the disposable safety syringe 1 according to the present embodiment includes a needle base 10, a joint portion 20, a syringe barrel 30, and a plunger 40. It is installed and fixed at the front end portion 31 inside the syringe barrel 30 to form a stop end of the chemical solution. The needle base 10 is a general needle base and includes an injection needle 11 and a base 12. The needle base 10 is first fitted on the annular support base 21 on the front end surface of the joint 20, and then the inside of the syringe barrel 30 through the rear end port 32. When the joint portion 20 is inserted and positioned at the front end portion 31 inside the syringe barrel 30, the syringe needle 11 is exposed to the outside of the front end port 33 of the syringe barrel 30, and is a needle base 10 generally called an interior type. The needle base 10 is not replaced after assembly or use.
The plunger 40 reciprocates inside the syringe barrel 30. An annular groove 41 is provided on the outer edge surface of the front end portion, and the gasket 3 is fitted therein to form a rear stop end of the chemical liquid. At the time of use, as shown in FIG. 11, the plunger 40 is pulled to introduce the chemical solution 4 in the chemical bottle into the syringe barrel 30, and the plunger 40 is pushed as shown in FIG. And injection is performed by releasing from the needle base 10.

As shown in FIGS. 5, 6, 7, and 8, the joint portion 20 is integrally formed with a flow path inside, and an annular support base 21 with a small diameter is formed on the front end surface so that the needle base 10 One or more annular grooves 22 are formed on the outer peripheral surface of the gasket 3 and the gasket 3 is fitted. The front end of the syringe barrel 30 is matched to the diameter of the syringe barrel 30. A pivot piece 24 having an appropriate thickness is provided on the rear end face of the pivot piece 24 and is connected to the rear end face 23 of the joint portion 20 by a connecting piece 25 on its edge. The connecting piece 25 becomes the pivot of the pivot piece 24, and the pivot piece 24 is bonded to the rear end face 23 of the joint portion 20 as shown in FIGS. 5 and 6, or as shown in FIGS. The pivot piece 24 can be opened with the piece 25 as a pivot. As shown in FIGS. 5 and 6, when the pivot piece 24 is bonded onto the rear end face 23 of the joint portion 20, the outer surfaces of the pivot piece 24 and the rear end face 23 form a flat surface. Is the best.
The connecting piece 25 can be designed to have elasticity, and as shown in FIGS. 9 and 10, the connecting piece 25 can have a V-shaped cross section to increase its elasticity, and the pivot piece 24 has elasticity. Thus, it is possible to have a structure that is bonded onto the rear end surface 23 of the joint portion 20 and does not fall off unless pulled apart by an external force. In addition, a circular through hole 26 having an appropriate diameter is provided in the center of the pivot piece 24 and penetrates the flow path space of the connecting portion 20.

  As shown in FIGS. 3 and 4, a convex column 43 corresponding to the through hole 26 is provided on the front end surface 42 of the plunger 40, and the convex column 43 has an appropriate height, and a hook portion 44 is formed at the upper end thereof. The fitting cone 45 is provided, and the size of the fitting cone 45 is set in accordance with the through hole 26, and the plunger 40 is pushed forward so that the fitting cone 45 is inserted into the through hole 26 of the pivot piece 24. When the injection is completed, most of the fitting cone 45 is penetrated into the through hole 26. However, as shown in FIG. 1, when the processing before disposal is performed, as shown in FIG. 13, the plunger 40 is further pushed in, the fitting cone 45 is further advanced into the through hole, and the hook portion 44 is completely penetrated into the through hole 26. Thereafter, the hook portion 44 is engaged with the through hole 26 to thereby 7, 8, and 14, the pivot piece 24 is first separated from the rear end surface 23 to be inclined as shown in FIGS. 7, 8, and 14, and as shown in FIG. The needle base 10 can be moved rearward to be drawn into the syringe barrel 30, and the syringe needle 11 can be prevented from being exposed to the outside. Further, at this time, as shown in FIG. 16, the plunger 40 can be cut by the cutting portion 47 provided on the plunger rod 46, and the plunger 40 is pushed again to prevent the needle base 10 from being exposed again. it can.

  Since the connecting piece 25 between the pivot piece 24 and the rear end face 23 of the joint portion 20 is located in the vicinity of the edge portion, the direction in which the connecting piece 25 pulls the joint portion 20 is a force from the edge toward the central axis portion. When the torque is formed on the joint portion 20 and the joint portion 20 is pulled into the syringe barrel 30, the joint portion 20 is inclined obliquely, and a needle fitted to the front end of the joint portion 20 as shown in FIG. The base 10 is also drawn into the syringe barrel 30 obliquely. At this time, the plunger rod 46 is not cut yet, and the plunger 40 is first pushed in, and the tip of the inclined injection needle 11 is placed on the convex edge in the injection cylinder 30 such as the inner convex edge of the front end portion 31. 15, as shown in FIG. 15, force is applied to the injection needle 11 to bend it in the syringe barrel 30, destroy the injection needle 11 to make it safe, and then the plunger rod 46 is cut by the cutting portion 47. Can do.

As shown in FIGS. 17, 18, 19, 20, and 21, the disposable safety syringe 2 has substantially the same members and structures as the disposable safety syringe 1 and can achieve the same effects as shown in FIGS. 20 and 21. However, the difference between the two is that the syringe barrel 30a of the disposable safety syringe 2 is provided with a front end port 34, the diameter of which is larger than the diameter of the front end port 33 of the syringe barrel 30 of the disposable safety syringe 1, At the time of assembly, the joint portion 20 is inserted and fixed from the rear end port 32 of the syringe barrel 30a to the front end portion 31 inside the syringe barrel 30a to form a front stop end of the liquid medicine, and the needle base 10 is in front of the syringe barrel 30a. It is fitted on the tubular support 21 at the front end surface of the joint portion 20 from the end port 34, and the injection needle 11 can be exposed to the outside of the front end port 34 of the syringe barrel 30a, and a generally called external needle base is formed. After assembly or use Easy-to-replace the needle hub, if sometimes necessary.
Needless to say, the present invention is not limited to the above-described embodiments as long as the features of the present invention are not impaired.

It is a perspective view of the disposable safety syringe of one Example of this invention. It is an exploded view which shows the syringe of FIG. It is sectional drawing which shows the injection device of FIG. It is sectional drawing which shows the state which the plunger of FIG. 3 reached | attained the junction part. It is a perspective view which shows the state which the pivot piece of the junction part of this invention is not open. It is sectional drawing which shows the junction part of FIG. It is a perspective view which shows the state which the pivot piece of the junction part of FIG. 5 opened. It is sectional drawing which shows the junction part of FIG. It is a perspective view of another Example of the connection piece of the junction part of this invention. It is sectional drawing which shows the junction part of FIG. It is sectional drawing which shows the state in which the syringe of FIG. 3 inhales a chemical | medical solution. It is sectional drawing which shows the state which the syringe of this invention injects a chemical | medical solution. It is sectional drawing which shows the connection of the plunger of this invention, and a pivot piece. It is sectional drawing which shows the state which retracted the junction part of this invention in the syringe barrel. It is sectional drawing which shows the state which destroyed the injection needle of FIG. It is sectional drawing which shows the state which cut | disconnected the plunger of FIG. It is an exploded view which shows the disposable safety syringe of another Example of this invention. It is sectional drawing which shows a mode that the needle base of FIG. 17 is mounted | worn. It is sectional drawing which shows the state after the assembly of FIG. FIG. 19 is a cross-sectional view showing a state where the joint portion of FIG. It is sectional drawing which shows the state which destroyed the injection needle of FIG.

Explanation of symbols

1, 2 Disposable safety syringe 3 Gasket 4 Chemical liquid 10 Needle base 11 Injection needle 12 Base 20 Joint 21 Tubular support 22 Annular groove 23 Rear end surface 24 Pivoting piece 25 Connection piece 26 Through-hole 30, 30a Syringe 31 Front end portion 32 Rear end ports 33, 34 Front end port 40 Plunger 41 Annular groove 42 Front end surface 43 Projection column 44 Hook portion 45 Fitting cone 46 Plunger rod 47 Cutting portion

Claims (4)

A disposable safety syringe comprising a needle base, a joint, a syringe barrel, and a plunger,
The needle base includes an injection needle and a base, and the base is fitted on an annular support base on the front end surface of the joint,
The joint portion is fixed to the front end portion inside the syringe barrel and is integrally formed with a flow path inside, and an annular support base having a small diameter is formed on the front end surface, and a needle base is fitted, One or more annular concave grooves are formed on the outer peripheral surface and a gasket is fitted therein, and a pivot piece having an appropriate thickness is provided on the rear end surface. The connecting piece is connected to the rear end surface of the joint, and the connecting piece is formed with a pivot of the pivot piece. The pivot piece is bonded to the rear end face of the joint or the connection piece is pivoted. The center of the pivot piece is provided with a circular through hole with an appropriate diameter and penetrates the flow path space inside the joint.
The plunger reciprocates inside the syringe barrel, an annular groove is provided on the outer edge surface of the front end portion, a gasket is fitted, and a convex column corresponding to the through hole in the center of the pivot piece is provided on the front end surface. Provided, the convex column has an appropriate height, and a fitting cone provided with a hook portion is provided at an upper end thereof,
When the plunger is pushed forward and the fitting cone on the convex column reaches the through hole, the plunger can be pushed further into the fitting hole and the hook portion can be inserted into the through hole. When the plunger is pulled by being engaged, the pivot piece is separated from the rear end face to be inclined first, and the connecting piece and the needle base on the upper part thereof are moved to the rear portion by the connecting piece, and the syringe barrel is moved. A disposable safety syringe characterized by being retractable inside.   The needle base is first fitted on the annular support base of the joint front end surface, and then inserted into the syringe barrel from the rear end port of the syringe barrel, and when the joint portion is localized at the front end portion inside the syringe barrel, The disposable safety syringe according to claim 1, wherein the injection needle is exposed to the outside of the front end opening of the syringe barrel.   The joint is inserted into the inside from the rear end of the syringe barrel and is pushed into the front end of the syringe barrel to be fixed. The needle base is fitted from the front end of the syringe barrel to the tubular support on the front end surface of the joint. The disposable safety syringe according to claim 1, wherein the injection needle is exposed outside the front end of the syringe barrel. The disposable safety according to claim 1, wherein when the pivot piece is bonded onto the rear end surface of the joint, it is best that the outer surface of the pivot piece and the rear end surface form a flat surface. Syringe.

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