JP3247004B2 - Syringe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a syringe. More particularly, it relates to a simple and safe syringe having a retractable self-tilting injection needle.

[0002]

BACKGROUND OF THE INVENTION U.S. Pat. No. 5,232,458 entitled "Safe Syringe with Telescopic Self-Inclination Needle", issued to the present inventor, is embedded in the front of the syringe and secured in the stopper 13. Needle having a needle head at the rear portion thereof, and an oblique hole having a recess at the front of a plunger (rod piston) to be slidably provided in the syringe so as to engage with the needle head for the injection needle inclined in the syringe. A plunger having a socket (receptacle) is described. When the plunger and the injection needle are retracted into the syringe, the plunger prevents the telescopic injection needle from protruding to the outside and prevents damage to the outside. Have been.

However, the stopper 13 should be attached to the front of the syringe 1 with the stopper 13 holding the injection needle 2 so that it is usually located at the front of the syringe 1 for injection.

In order to reduce material costs and to increase the efficiency of such a secure syringe assembly, the stopper 13 should be eliminated, the needle 2 is simpler to assemble and
It should have been attached directly to the front of the syringe 1 to reduce its cost.

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to solve the above problems and to provide a safe syringe which can be easily assembled.

[0006]

SUMMARY OF THE INVENTION The present invention generally comprises a hollow needle held at the front of a syringe, a plunger movably held within a syringe cylinder, and a conical longitudinal axis inclined from the needle axis. A secure member comprising a connecting member held on a plunger to engage at least one angled female fitting with a recess in the rear of the hollow needle, typically having a sloped female fitting formed as a cone. The present invention relates to a syringe, and according to the present invention, when the injection needle is fixed to a syringe having a syringe needle axis so as to be aligned with a syringe axis formed vertically at the center of the syringe, after the injection is completed, the connecting member is connected. When the plunger is pressed against the injection needle part so as to be inserted into the inclined female fitting part, the inclined female fitting part and the connecting member are connected. After that, when the plunger and the injection needle are retracted into the syringe cylinder, the inclined female type is inserted. Fitting Parts and the connecting member is returned to the original is the connecting member and the plunger by meshing smoothly, the injection needle is prevented from automatically inclined to protrude into the syringe, whereby it is possible to prevent the protrusion of the external.

As shown in the drawings, the syringe of the present invention comprises an injector 1, an injection needle device 2, and a plunger means 3.
Consists of Here, in the syringe, the front where the injection needle is located, the rear where the plunger handle is located,
The front-back direction is vertical.

The syringe 1 includes the following members: a hollow portion 10 formed in the syringe cylinder 11 for filling the syringe cylinder 11 with the drug solution 4 and a syringe shaft extending vertically in the center of the syringe cylinder 11. Syringe cylinder 11 having 100;
A through-hole 1 formed at the front of the syringe cylinder 11, which is reduced forward from the syringe cylinder 11 and communicates with the syringe cylinder.
A sleeve portion 12 having a portion 21; a branch portion 122 formed at a rear portion of the sleeve portion 12 adjacent to the syringe cylinder 11; an annular groove 12 having an annular recess at a front portion of the sleeve portion 12;
0: syringe handle 1 formed at the rear end of syringe cylinder 11
4; a sealing ring 15 formed annularly at the rear end of the sleeve 12 between the through hole 121 of the sleeve 12 and the hollow portion 10 of the syringe cylinder 11; and an annular limit projection 16 formed annularly at the rear of the syringe cylinder 11.

The injection needle device 2 includes the following members: an injection needle portion 21 having an injection needle tip 211 formed at the front end of the injection needle portion 21; held in the sleeve portion 12 so as to engage with the annular groove 120. An annular packing ring 26 provided around the shank portion 22; a branched elongated groove 25 having a depression extending forward from the rear end of the injection needle provided in the longitudinal direction at the rear of the leg 22; At least one inclined female fitting 27 formed conically at the rear of the part 22 and having a recess from the rear end 230 of the needle forward;
In the center of the injection needle device 2, a needle shaft 200 along the longitudinal axis, and a leg 2 made of a resilient plastic material
2 and needle back end 230. The inclined female type fitting portion 27 such as a socket is not limited in the present invention, but is provided with two sockets 2 having a recess in parallel with the rear portion of the injection needle device 2.
A plurality of sockets such as 7, 27a may be used.

[0010] The injection needle shaft 200 is usually aligned with the syringe cylinder shaft 100 when the injection device 2 is attached to the injector 1 sleeve 12 during an injection.

Each inclined female fitting 27 is generally conical and includes the following members: conical bottom 271;
Conical apex 272 tapering forward from 71; here the longitudinal conical axis 270 is straight with the conical apex 272, perpendicular to the conical bottom 271 and tilted away from the injection needle axis 200 of the injection device 2; A sharp angle A is defined between 200 and the longitudinal conical axis 270 of the inclined female fitting 27. The inclined female-type fitting portion 27 is connected to the plunger means 3 after the injection, and is male-type such as an arrowhead of the plunger means 3 for inclining the injection needle device 2 when pulled into the syringe cylinder 11. It fits tightly with fitting part 301.

The plunger means 3 includes the following members: a plunger 31 movably held on the syringe cylinder 11 of the injector 1; a slanted female fitting 27 provided on the injection needle device 2; A coupling member 30 having a male fitting portion 301 formed at the front end of the insertable coupling member 30 and held in the conical recess 34 of the plunger 31; a male fitting inserted into the inclined female fitting portion 27. When the injection needle rear end 230 confined in the branch portion 122 formed at the rear end of the injector 1 sleeve portion 12 by the joint portion 301, the injection needle rear end 2
Holding socket 32 provided concentrically around a male fitting portion 301 so as to connect the plungers 30
A plan having a plunger handle 37 extending rearward from the plunger 31 to engage an annular limit projection 16 formed at the rear end of the syringe cylinder 11 with an annular recess 311 of the plunger 31 to limit backward movement. Jar stick 35. The plunger shaft 300 defined by the vertical axis in the center of the injector 1 is usually the needle shaft 20 of the needle device 2.
0 and in line with the syringe axis 100 of the injector 1.

The connecting member 30 includes the following members: a conical shape, which is connected to the conically inclined socket 27 of the needle device 2 and, as shown in FIG. A barbed portion 301 having a barbed portion apex 301a which is linear with the plunger shaft 300, the injection needle shaft 200 and the syringe shaft 100, and a neck portion 30 connected to the barbed portion 301.
2; and a conical base 303 embedded in the conical recess 34 of the plunger 31 to show sufficient sealing force and having an annular projection 304 formed around the conical surface.
Then, the plunger rod 35 of the plunger means 3 was attached to the conical base 303.

[0014]

When using the syringe of the present invention as shown in FIG. 1, the plunger 31 is pushed forward to inject the medicine in the syringe cylinder 11 through the injection needle device 2 to the patient.

The male fitting portion 301 of the connecting member 30 is forcibly inserted and pushed into the inclined female fitting portion 27 of the injection needle device 2 so as to store the elastic potential energy of the branched rear portion of the injection needle. When the rear end 230 of the second injection needle 230 is inflated and branched, the connecting member 30 and the injection needle device 2 are connected as shown in FIGS.

After the injection needle device 2 connected to the plunger 31 is drawn into the hollow portion 19 of the syringe cylinder 11 as shown in FIG. 3, a male fitting portion 301 is formed as shown in FIGS.
When the female fitting 27 is firmly connected to the inclined female
The inclined female fitting portion 27 returns to its original position in a state where it is fully connected to the male fitting portion 301 of the connecting member 30 of the plunger means 3 by releasing the elastic force accumulated at the rear end 230 of the injection needle. , Plunger 31 as shown in FIGS.
The injection needle device 2 combined with the is tilted. When the injection needle device 2 is pushed outward again, the needle tip 211 becomes the syringe cylinder 11.
It is obstructed by a sealing ring 15 formed at the front, whereby the injection needle 2 bends and is prevented from protruding outside, and furthermore damage and pollution to the environment are prevented.

[0017]

The syringe of the present invention has an effect that the plug (corresponding to the plug 13 of the above-mentioned US Pat. No. 5,232,458) is removed, and the price is low and the assembly is easy.

On the other hand, since the used needle device 2 can be removed from the sleeve portion 12 and replaced, the new needle can be inserted from the open end of the sleeve portion 12 into the sleeve portion.

[Brief description of the drawings]

FIG. 1 is an illustration showing an embodiment of the syringe of the present invention ready for injection.

FIG. 2 is an explanatory view showing one embodiment of the syringe of the present invention when the injection of the drug solution is completed.

FIG. 3 is an explanatory view showing one embodiment of the syringe of the present invention in which the injection needle is pulled into the syringe.

FIG. 4 is an explanatory view showing one embodiment of the syringe of the present invention in which the injection needle is bent in the syringe.

FIG. 5 is a partially cutaway explanatory view showing an injection needle used in the present invention.

FIG. 6 is a partially broken explanatory view showing a connecting member connected to the rear part of the injection needle according to the present invention.

FIG. 7 is a partially cutaway illustration showing an inclined injection needle retracted into the syringe of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 2 ... Injection needle device 3 ... Plunger means 11 ... Syringe cylinder 12 ... Sleeve part 16 ... Annular protrusion 21 ... Injection needle part 22 ... Leg part 25 ... Elongated groove 26 ... Annular packing ring 27 ... Female fitting part 30 ... Connection Member 31 Plunger 32 Holding socket 34 Conical recess 35 Plunger rod 37 Plunger handle 120 Annular groove 211 Needle tip 230 Injection needle rear end 231 Guide port 271 Conical bottom 272 Conical apex 300: Plunger shaft 301: Male fitting 302: Neck 303: Conical base 304: Annular projection 311: Annular depression

Claims (4)

(57) [Claims] 1. An injector including a syringe cylinder and a sleeve portion provided at a front portion of the syringe cylinder and having a through hole communicating with the syringe cylinder; fixed to a leg portion provided at the sleeve portion and provided at a rear portion thereof. inclined female篏合portion having a cone axis forming an acute angle with the needle axis in line with the syringe axis and at least one organic and previously
A hollow injection needle portion having a needle tip formed at an end; the injection needle;
Around the sleeve so as to engage with the annular groove of the sleeve.
A leg having an annular packing ring provided on the enclosure, said leg
Formed along the longitudinal axis at the rear, and from the rear end of the injection needle
A bifurcated elongated groove having a recess toward the front, the leg
Formed at the rear and forward from the rear end of the syringe
At least one of the inclined female molds communicating with a recessed guide port
A needle device having a fitting ; a plunger slidably held in the syringe cylinder and a front end embedded in the plunger and connectable with the inclined female fitting; A syringe comprising plunger means including a coupling member having a male fitting. 2. The inclined female-type fitting portion 27 has a conical bottom 271.
And syringe according to claim 1 comprising a conical apex 272 tapers forward from the conical bottom 271. 3. The plunger means 3 is slidably held in the syringe cylinder 11; the plunger 31 is held in a conical recess 34 and inserted into the inclined female fitting portion 27. A connecting member 30 which is possible and has a male fitting portion 301 provided at the front end;
A retaining socket 32 engageable with the male fitting 301 and concentrically disposed around the male fitting portion 301; the plan having an annular recess 311 that engages with the annular limiting projection 16 formed at the rear of the syringe cylinder 11; A plunger rod (35 ) having a jar (31) and a plunger handle (37) projecting rearward of the plunger (31 ).
Item 3. The syringe according to Item 2 . 4. The connecting member 30 is conical and has a barbed portion 301a apex which engages with the inclined female fitting portion 27; a neck portion 302 connected to the barbed portion; and a conical recess 34. syringe according to any one of claims 1 to 3 having a conical base portion 303 having an annular projection 304 which is formed around the conical surface be embedded.