KR100894342B1 - A syringe - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a syringe which can prevent blood and medicament from remaining in a cylinder after injection, and which can easily and easily inject a needle of a used syringe into a plunger for drug promotion. There is. According to the present invention, a cylindrical cylinder (20) having an injection hole (232) and an injection hole (231) opened substantially opposite in the axial direction, and inserted into the cylinder from the injection hole (232) and along the axial direction. In a syringe having a sliding rod-like plunger 50 and a needle means 40 which is slidably disposed near the spout 231 in the cylinder, the cylinder 20 A first inner convex edge 24 is formed on an inner circumferential surface near the spout in the cylinder, and an annular needle holding means 30 is detachably coupled to the first inner convex edge 24. In addition, the needle means 40 is inserted into the annular portion of the annular needle holding means, and has one end portion 413 coupled thereto so as to be able to pass through further, and the seal. Tube-shaped needle fixing port 41 having the other end 411 detachably coupled to the spout in the furnace, and one end 421 as a hollow body is fixed to the needle fixing hole 41, and the other end. 422 consists of a needle 42 which is exposed out of the cylinder by inserting the spout 231 and seals the plunger 50 to one end 541 inserted into the cylinder of the plunger 50. And a plug means 56 which is detachably installed to maintain the inside of the plunger at a pressure lower than atmospheric pressure.

Description

Syringe {A SYRINGE}

The present invention relates to a syringe, and more particularly, to a syringe that can accommodate a needle of a used syringe in a plunger for drug promotion.

As shown in Figs. 1 and 2, the syringe 10 disclosed in US Pat. No. 5,176,640 is mainly provided with one end portion with the spout 111 and the other with the inlet 112 almost opposite in the axial direction thereof. A cylindrical cylinder 11 having an end portion, a holder 12 provided only outside the spout 111, and a holder 132 while being held by the holder 12, the cylinder 11 A hollow needle inserted into the cylinder 13 and inserted into the cylinder 11 from the injection hole 112 with the other end 133 exposed to the outside of the holder 12; A plunger 14 for chemical propulsion is provided. In addition, the rubber ring 16 which seals the plunger 14 at one end 141 inserted into the cylinder 11 of the plunger 14 and maintains the inside of the plunger l4 in a vacuum state, The plug 15 fitted to the rubber ring 16 is provided. In addition, a piston 17 having a connecting rod 172 inserted into the plug 15 and the ring of the rubber ring 16 along the axial direction thereof is provided in the plunger 14 so as to be slidable. have. In addition, a coupling rib 171 is formed on an inner surface of the connecting rod 172, and a recess 131 is formed at one end 132 of the needle 13 to engage the coupling rib 171. .

As such, after the injection of the medicine in the cylinder 11 is completed by pressing the plunger 14, the rubber ring is pressed at one end 132 of the needle 13 by pushing the plunger 14 toward the needle. After puncture (16), the groove 131 of the needle 13 is coupled to the coupling rib 171 of the piston 17. In this case, since the pressure in the plunger is smaller than the outside air, the needle 13 coupled to the piston 17 is sucked because the piston 17 is sucked further inward in the plunger due to the pressure difference in and out of the plunger. It may be introduced into the plunger together with the piston 17. In this way, the used syringe 10 accommodates the needle 13 in the plunger 14, and can prevent infection by the needle stabbing. However, such a syringe 10 is just before the completion of the injection, but when the injection is not yet complete, since the needle 13 has already passed the rubber ring 16 through the needle 13, the medicine or the blood in the cylinder 11 There is a flaw in it. In addition, when the needle 13 is held in the holder 12 too closely, the needle 13 is coupled to the piston 17 by the combination of the rib 171 and the groove 131. There is a possibility not to be introduced into the plunger 14 together. On the contrary, when the holding | maintenance of the holder 13 with respect to the needle 13 is not enough, for example, when there is a clearance gap between the needle 13 and the holder 12, during the injection, the needle 13 ) May be introduced into the cylinder 11 or may be far from the holder 12.

In view of the above, it is an object of the present invention to provide a syringe which can prevent blood and medicament from remaining in a cylinder after injection, and which can easily and smoothly inhale the used needle into the plunger.

In order to achieve the above object, the present invention provides a cylindrical cylinder having an injection port and an injection port that are substantially opposite in the axial direction, and a hollow rod shape inserted into the cylinder from the injection port and sliding along the axial direction. A syringe provided with a plunger for propelling a drug and a needle means which is slidably provided near a spout in the cylinder, wherein the cylinder has a first internal convex edge on an inner circumferential surface near the spout in the cylinder. An annular needle holding means that is formed and is detachably coupled to the first internal convex edge, and the needle is inserted into the ring of the annular needle holding means, and furthermore, passes through One end coupled therein, and in the cylinder A needle on the tube having a second end that is detachably coupled to an ejection outlet, and a needle which is a hollow body, one end of which is fixed to the needle fixing port, and the other end passes through the ejection outlet and is exposed out of the cylinder. The plug means which seals the plunger at one end inserted into the cylinder of the plunger and keeps the inside of the plunger at a pressure lower than atmospheric pressure is provided detachably.

The syringe constituted as described above moves the needle holding means with the plunger while engaging the plug means with the needle fixing hole by pushing the plunger toward the ejection outlet after the injection of the medicine in the cylinder is completed. The pressure of the plunger is pushed toward the ejection outlet, thereby advancing the needle fixing port, passing through the annular portion of the needle holding means, releasing the engagement with the needle holding means, and pulling the plug means out of the plunger. Since the pressure is smaller than the external pressure, the needle means can be sucked into the plunger like the plug means. In this manner, even after the injection of the medicine in the cylinder is completed, the needle means can be sucked into the plunger unless the plunger is pushed toward the ejection outlet and the plug means is not integrally engaged with the needle fixing port. Since the drug in the cylinder can be completely extruded, the drug and blood can be prevented from remaining in the cylinder.

Further, the other end of the needle fixing port is detachably coupled to an ejection outlet in the cylinder, and one end of the needle fixing port is inserted into the ring of the needle holding means, thereby engaging the first internal convex edge in the cylinder. Therefore, the needle can be prevented from being immersed in the cylinder or away from the needle holding means during scanning. The plunger pushes the needle holding means toward the ejection outlet to advance the needle fixing hole, penetrates into the annular portion of the needle holding means, and releases the plug means from the needle holding means. By pulling out from the plunger, the needle means can be smoothly sucked into the plunger together with the plug means.

EXAMPLE

Hereinafter, a preferred embodiment of the syringe of the present invention will be described with reference to the drawings. First, a first embodiment of a syringe according to the present invention will be described with reference to FIGS. 3 and 4. As shown, the syringe in the present embodiment mainly includes a cylindrical cylinder 20 in which an injection port 232 and an injection port 231 which are substantially opposed in the axial direction thereof are opened, and the injection hole 232. The needle means which is inserted in the cylinder 20 from the side, and is provided in the hollow rod-shaped plunger 50 which slides along the said axial direction, and is slidable in the vicinity of the ejection opening 231 in the said cylinder 20. 40 is provided.

In addition, the cylinder 20 includes a large diameter portion 22 in which the injection hole 232 is opened, and a small diameter portion 21 in which the injection hole 231 is opened. The small diameter portion 21 is added from the beginning of the first section 212 so that the first section 212 extends gradually tapering from the large diameter portion 22 and the spout 231 is headed. It consists of a second section 211 extending almost uniformly. In addition, a shoulder 213 is formed on an inner surface between the first section 212 and the second section 211. Further, a first internal convex edge 24 is formed on the inner circumferential surface near the spout in the large diameter portion 22. Then, a plurality of ribs 234 are provided along the axial direction on the inner circumferential surface of the small diameter portion 21 in the vicinity of the spout, respectively, forming a gap 236 for communicating the outside air and the cylinder 20 therebetween. have. In addition, a plurality of coupling ribs 235 are formed on the outer circumferential surface of the small diameter portion 21 so as to extend in the axial direction.

The large diameter portion 22 is provided with an annular needle holding means 30 that is detachably coupled to the first internal convex edge 24. The annular needle holding means 30 includes a first side face 33 facing the spout 231 and a second side face 34 facing the plunger 50 and the first and second side faces 33. , Between the inner and outer two main surfaces 36 and 35 interposed therebetween, and the outer peripheral surface 35 is formed with a first annular groove 350 engaged with the first inner convex edge 24. A second annular groove 32 is formed on the inner circumferential surface 36.

Further, the needle means 40 is inserted into the annular portion of the annular needle holding means, and has one end portion 413 coupled thereto so as to penetrate further and penetrate therethrough, and the main portion of the cylinder 20. Tube-shaped needle fixing port 41 having the other end 411 detachably coupled to the outlet 231, and a hollow body and one end 421 is fixed to the needle fixing hole 41, and the other end. The small diameter portion 21 penetrates the spout 231 and covers the needle 42 exposed outside the cylinder 20 and the needle 42 exposed outside the spout 231. The cover 43 is coupled to the outside of the). The outer peripheral surface of the needle fixing port 41 is formed with a flange 414 engaged in the second annular groove 32. In addition, the inner circumferential surface of the cover 43 is provided with a plurality of coupling ribs 235 of the small diameter portion 21 and a plurality of ribs 431 engaged with each other along the axial direction. In addition, when one end portion 413 of the needle fixing port 41 in the needle means 40 moves forward and penetrates the needle holding means 30, the needle holding means 30 is used for the penetration. An annular groove 39 is formed in the first side face 33 of the needle holding means 30 so as to be easily deformed.

In addition, the plunger 50 is a first tube 51 having one end portion 541 inserted into the cylinder 20 and a second tube diameter larger than the first tube 51 in the front-rear order. It consists of the tube body 52 and the 3rd tube body 53 which has a tube diameter larger than the tube diameter of the large diameter part 22 of the said cylinder 20. A shoulder 55 is formed between the first tube 51 and the second tube 52 in the plunger 50. Then, the plunger 50 is sealed at the head of the first tubular body 51, that is, at one end 541 inserted into the cylinder 20 of the plunger 50, so that the pressure inside the plunger 50 is lower than atmospheric pressure. The plug means 56 held by the holder is detachably installed.

In this embodiment, the plug means 56 has a bell shape in which a central portion is recessed, and the plug means 56 is provided at the head of the first tube 51 so that the recessed portion 561 faces the spout 231. Although inserted and coupled, as shown in FIGS. 20 and 21, the plug means 56 may be blocked in the tube of the first tube 51. Further, a stepped portion 563 is formed at the open end edge 564 of the recessed portion 561 to receive and hold the one end 413 of the needle fixing port 41, and the stepped portion 563 is provided. An annular groove 565 is formed on the inner surface of the needle fixing port 41 in contact with the one end portion 413 of the needle. One end 413 of the needle fixing port 41 is provided with a protrusion 412 inserted into the plug means 56, and a protrusion coupled to the annular groove 565 on the protrusion 412. 415 is formed (see FIG. 5).

The annular hook 546 and the protruding edge 547 are formed on the outer circumferential surface 544 of the one end 541 of the first tube 51 of the plunger 50. A cylinder 59 slidable along the axial direction in the large diameter portion 22 of the cylinder 20 by the annular hook 546 and the protruding edge 547 of the outer peripheral surface 544 of the first tube. It is coupled to the outside. In addition, a protruding body 58 inclined and stretched to gradually approach the third tube body 53 is formed near the third tube body 53 on the inner circumferential surface of the second tube body 52. A coupling protrusion edge 545 is formed near the third tube body 53 on the outer circumferential surface of the second tube body 52, and the coupling protrusion edge 545 is located near the injection port 232 in the cylinder 20. A second inner convex edge 25 is formed which stops. In addition, a cap 57, which is screwed with the outer circumferential surface of the third tube body 53, is provided at the other end 542 of the plunger 50.

When the drug is to be injected, the plunger 50 is pushed to slide in the cylinder 20 toward the needle holding means 30 in the axial direction, thereby extruding the drug in the cylinder 20 to give the needle 42 Can also be injected via). 4 and 5, when the seal ring 59 of the plunger 50 comes into contact with the second side face 34 of the needle holding means 30, the second tubular body 52. It can be seen that the injection of the medicament is completed by the engaging protruding edge 545 at the outer circumferential surface of the halting stop at the second inner convex edge 25 in the cylinder. At the same time, as shown in FIGS. 5 and 6, the plunger 50 is pushed forward toward the spout 231 to be inserted into the protrusion 412 of the needle fixing port 41, and the protrusion By engaging the projection 415 on the sieve 412 to the annular groove 565, the needle holding means in the plunger 50 while integrally engaging the plug means 50 with the needle fixing port 41 Press 30 toward the ejection outlet 231 to advance the needle fixation port 41 to penetrate the inner ring of the needle retaining means 30, and the needle retaining means 30 is removed from the cylinder 20; 1 By pulling out from the internal convex edge 24 and the flange 414 of the needle fixing port 41, the coupling between the needle holding means 30 and the needle fixing port 41 is released, and 41 press the plug means 56 to the wire of the plunger 50. Subtracted from within the plunger. In this case, since the pressure in the plunger is less than the external pressure, as shown in FIG. The sphere 41 and the needle 42 can be sucked into the plunger until they are stopped by the shoulder 55 or the protrusion 58 in the second tube body 52. In this way, the used syringe can accommodate the needle 42 in the plunger 50, and can prevent infection by the incorrect insertion of the needle.

8 and 9 show a second embodiment of the present invention. As shown, the difference from the first embodiment of the syringe in this embodiment is that one end 62 in the second section 211 is compressed to the other end 411 of the needle fixing port 41. It is at the point that the elastic pressing member 60 which the other end 61 contacts the said spout 231 vicinity is provided, and presses. Since the other structure of the syringe in this embodiment is the same as that of the first embodiment, the same reference numerals are used and the description thereof is omitted.

Thereby, after the injection is completed, the plunger 50 pushes the syringe holder means 30 toward the spout 231 to advance the needle holder 41 to annular the needle holder means 30. Penetrates the inside, releases the coupling between the needle holding means 30 and the needle fixing port 41, and pulls out the plug means 56 from the head of the plunger 50 into the plunger, The compression of the member 60 is also released. In this case, the elastic pressing member 60 not only presses the needle fixing port 41 toward the injection hole 232 with its elastic recovery force, but also because the pressure in the plunger 50 is smaller than the outside, the elastic recovery force and the Due to the pressure difference in and out of the plunger 50, the plug means 56 is sucked further into the plunger 50 and the needle fixing port 41 and the needle 42 are introduced into the plunger 50. I can accept it.

10, 11, and 12 show a third embodiment of the present invention. As shown, the difference from the first embodiment of the syringe in this embodiment is the space P between the inner wall of the cylinder 20 and the needle holding means 30 and the needle fixing port 41. Space for compressing the fluid for compression and receiving the fluid for compression against the other end 411 of the needle fixing port 41 in the shoulder 213 in the second section 211. ) Is provided with a sealing material 70 hermetically sealed, and a cutout portion 416 communicating with the space P around the needle 42 of the other end 411 of the needle fixing port 41. ) Is formed. The seal member 70 is formed of an elastic packing piece 71 and a ring 72 in which through holes 711 and 712 through which the other end 421 of the needle 42 passes. In addition, the inner circumferential edge side portion 391 of the groove 39 is formed to extend the outer circumferential surface of the needle fixing port 41 so as to widen the area surrounding the outer circumferential surface of the needle fixing hole 41 of the needle holding means 30. I'm drawing along. In this way, even after releasing the coupling between the needle holding means 30 and the parking needle fixing port 41, the space P in the inner peripheral edge side portion 391 of the ring 72 and the groove 39 is released. ) Can be kept confidential. In addition, since the other structure of the syringe in a present Example is the same as that of the said 1st Example, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

Thereby, after the scanning is completed, the needle holding means 30 is pushed toward the ejection outlet 231 by the plunger 50 to advance the needle fixing port 41 to annular the needle holding means 30. After penetrating the inside and releasing the coupling between the needle holding means 30 and the needle fixing port 41, the plunger 50 moves the needle holding means 30 to the ejection outlet 231. By pressing in the direction of, the needle holding means 30 compresses the space P, and simultaneously pulls out the plug means 56 from the head of the plunger 50 into the plunger. In this case, since the pressure in the plunger 50 is smaller than the outside, the pressure in the compressed space P increases, so that the plug means 56 is moved by the pressure difference between the plunger and the pressure in the space. The needle fixation port 41 and the needle 42 may be introduced into and accommodated in the plunger 50 at the same time as suctioning further inward in the chamber 50.

13 and 14 show the fourth embodiment of the present invention. As shown in the drawing, the syringe in this embodiment is configured almost the same as in the third embodiment, but differs from the third embodiment in that the one end portion 62 in the second section 211 is provided. An elastic pressing member 60 is provided in which the other end portion 61 abuts against the spout 231 while being compressed and pressed by the packing piece of the sealing material 70. In addition, since the other structure of the syringe in a present Example is the same as that of the said 3rd Example, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Thereby, after the injection is completed, the needle holding means 30 is pushed toward the ejection outlet 231 by the plunger 50 to advance the needle fixing port 41 to be in the annular portion of the needle holding means 30. After passing through and releasing the coupling between the injection holding means 30 and the needle fixing port 41, not only the pressure difference inside and outside the plunger, but also the pressure and the elastic pressing member 60 as in the third embodiment. By means of the elastic recovery force, the plug means 56 can be sucked further in the plunger 50 and the needle fixation port 41 and the needle 42 can be introduced into the plunger 50 and accommodated therein.

15, 16, 17 and 18 are the fifth, sixth, seventh and eighth embodiments of the present invention, respectively. The cylinders 20 and needles in these embodiments are configured in the same manner as the first, second, third and fourth embodiments in this embodiment, but for application to extremely small syringes having an injection volume of 1 cc, for example. The dimensions of the holding means 30, the needle 40, the plunger 50, the elastic pressing means 60, and the seal member 70 are larger than those of the first, second, third and fourth embodiments. Becomes smaller. In addition, instead of the cylinder 59, a plurality of annular flanges 541 protrude in the radial direction on the outer circumferential surface 544 of the plunger 50. As such, the annular flange 5441 can be hermetically slid along the inner tube wall of the large diameter portion 22 of the cylinder 20.

19 is a ninth embodiment of the present invention. The difference from the fifth embodiment of the syringe in this embodiment is that the one end 541 of the plunger 50 and the needle holding means 30 are connected to the second side face 34 of the needle holding means 30. An annular convex edge 341 inserted into a gap formed therebetween is formed to protrude. In this way, the drug can be prevented from remaining between the plunger 50 and the needle holding means 30.

As described above, the syringe according to the present invention, after completing the injection of the medicament in the cylinder, and proceeds by pressing the plunger toward the ejection outlet, the plug means is integrally coupled with the needle fixing hole while the needle with the plunger Press the retaining means toward the ejection port to advance the needle fixation port, penetrate the annular portion of the needle retaining means, release the engagement with the needle retaining means, and simultaneously insert the plug means from the head of the plunger into the plunger By pulling out, since the pressure of the said plunger is less than an external pressure, it can suck in the said plug means further inward, and can carry the said needle means into the said plunger. In this way, even after the injection of the medicine in the cylinder is completed, the needle means cannot be sucked into the plunger unless the plunger is pushed toward the ejection outlet and the plug means is integrally engaged with the needle fixing port. By completely extruding the drug in the cylinder, the drug and the blood can be prevented from remaining in the cylinder.

Further, the other end of the needle fixing port is detachably coupled to an ejection port in the cylinder, and one end of the needle fixing port is inserted into the annular portion of the needle holding means, whereby the first internal convex edge in the cylinder. Since the needle is coupled to the needle, it is possible to prevent the needle from being introduced into the cylinder or leaving the needle holding means during scanning. The plunger pushes the needle holding means toward the ejection outlet to advance the needle fixing hole, penetrates into the annular portion of the needle holding means, and releases the plug means from the needle holding means. By taking out the plunger from the head of the plunger, the needle means can be sucked into the plunger together with the plug means.

1 is a cross-sectional view showing a state of use of a conventional syringe,

2 is a cross-sectional view showing a state in which the needle in the conventional syringe is sucked into the plunger;

3 is an exploded view showing a syringe in a first embodiment of the present invention;

4 is a cross-sectional view showing a state of use of the syringe in the first embodiment;

Fig. 5 is a partial sectional view showing a state in which the plug means and the needle means are integrally coupled in the first embodiment;

Fig. 6 is a partial sectional view showing a state in which the needle holding means and the needle fixing port in the first embodiment are released;

Fig. 7 is a cross-sectional view showing a state in which the plug means and the needle means are sucked into the plunger in the first embodiment.

8 is a cross-sectional view showing a syringe in a second embodiment of the present invention;

9 is a cross-sectional view showing a state in which the plug means and the needle means are sucked into the plunger in the second embodiment;

10 is a cross-sectional view showing a syringe in a third embodiment of the present invention;

11 is a cross-sectional view showing a state where the needle holding means is pressed by the plunger in the third embodiment;

Fig. 12 is a sectional view showing a state in which the plug means and the needle means are sucked into the plunger in the third embodiment;

13 is a sectional view showing a syringe in a fourth embodiment of the present invention;

14 is a cross-sectional view showing a state in which the plug means and the needle means are sucked into the plunger in the fourth embodiment;

15 is a cross-sectional view showing a syringe in a fifth embodiment of the present invention;

16 is a partial cross-sectional view showing a syringe in a sixth embodiment of the present invention;

17 is a partial cross-sectional view showing a syringe in a seventh embodiment of the present invention;

18 is a partial cross-sectional view showing a syringe in an eighth embodiment of the present invention;

19 is a cross-sectional view showing a syringe in a ninth embodiment of the present invention;

20 is a cross sectional view showing a modification of the first embodiment;

Fig. 21 is a cross-sectional view showing a state in which the plug means and the needle needle are sucked into the plunger in the modification.

Explanation of symbols for the main parts of the drawings

20: cylinder 21: small diameter portion

22: large diameter portion 24: first internal convex edge

25 second internal convex edge 30 needle holding means

39: groove 40: needle means

41: needle fixing hole 42: needle

43: cover 50: plunger

56: plug means 57: cap

211: first section 212: first section

231: inlet 232: inlet

411: the other end 413: one end

421: one end of the needle 422: the other end of the needle

545: protruding edge for joining 546: hook

Claims (17)

A cylindrical cylinder 20 having an injection port 232 and an injection port 231 generally opposed in the axial direction thereof, and inserted into the cylinder 20 from the injection port 232 along the axial direction; In the syringe provided with the slide-type hollow rod-type chemical | medical agent propulsion plunger 50, and the injection needle means 40 provided so that sliding is possible near the spout 231 in the said cylinder 20, The cylinder 20 has an annular shape in which a first inner convex edge 24 is formed on an inner circumferential surface near the spout 231 in the cylinder 20 and detachably coupled to the first inner convex edge 24. Needle holding means 30 is provided, In addition, the needle means 40 is inserted into the annular portion of the annular needle holding means 30, and has one end portion 413 coupled thereto so as to penetrate further and penetrate the cylinder 20. The tubular needle fixing port 41 having the other end 411 detachably coupled to the spout 231 in the inner portion thereof, and one end 421 as a hollow body is fixed to the needle fixing hole 41, , The other end 422 is composed of a needle 42 that penetrates the spout 231 and is exposed out of the cylinder 231, The plug means 56 that seals the plunger 50 at one end 541 inserted into the cylinder 20 of the plunger 50 and maintains the inside of the plunger 50 at a pressure lower than atmospheric pressure is detachable. Syringe characterized in that it is installed. The method of claim 1, The cylinder is composed of a large diameter portion 22 in which the injection hole 232 is open, and a small diameter portion 21 in which the injection port 231 is open, The small diameter portion 21 has a first section 212 extending from the large diameter portion 22 so as to be tapered gradually, and the head of the first section 212 so as to make the spout 231 the first. A second section 211 extending substantially uniformly from the second surface, and a shoulder 213 is formed on an inner surface between the first section 212 and the second section 211, The annular needle holding means 30 is provided in the large diameter portion 22 and has a first side face 33 facing the spout 231 and a second side face facing the plunger 50 ( 34 and the inner and outer two major surfaces 36 and 35 interposed between the first and second side surfaces, and the outer peripheral surface 35 has a first annular groove (40) which engages with the first inner convex edge 24 ( 350 is formed, a second annular groove 32 is formed on the inner circumferential surface 36, And a flange (414) coupled to the second annular groove (32) on an outer circumferential surface of the needle fixing port (41). The method of claim 2, The compression fluid is accommodated in the space P between the inner wall of the cylinder 20 and the needle holding means 30 and the needle fixing port 41. A sealing material hermetically sealing the space P containing the fluid for compression in contact with the other end 411 of the needle fixing port 41 in the shoulder 213 in the second section 211 ( 70) is installed, A cutout portion (416) communicating with the space (P) is formed around the needle (42) of the other end (411) of the needle fixing port (41). The method of claim 3, wherein The sealing material (70) is a syringe, characterized in that the through hole (711, 721) through which the other end (422) of the needle (42) is opened. The method of claim 2, One end portion 62 of the second section 211 is pressed against the other end portion 411 of the needle fixing port 41 while the other end portion 61 abuts against the outlet port 231. A syringe, characterized in that the elastic pressing member 60 is provided. The method of claim 3, wherein One end portion 62 of the second section 211 is compressed by the seal member 70 and pressurized, while the other end portion 61 is in contact with the spout 231 near the elastic pressing member 60. Syringe which is installed. The method of claim 2, When one end portion 413 of the needle fixing port 41 in the needle means advances and penetrates the needle holding means 30, the needle holding means 30 is easily deformed along the penetration. A syringe, characterized in that an annular groove (39) is formed in the first side face (33) of the needle holding means (30). The method of claim 3, wherein The portion 31 on the inner circumferential edge side of the groove 39 is extended along the outer circumferential surface of the needle fixing port 41 so as to widen the area surrounding the outer circumferential surface of the needle fixing port 41 of the needle holding means. Syringe, characterized in that there is. The method of claim 1, The plunger 50 has a first tube 51 having one end portion 541 inserted into the cylinder 20 and a second tube body having a tube diameter larger than that of the first tube 51. 52 and a third tube body 53 having a tube diameter larger than the tube diameter of the large diameter portion 22 of the cylinder 20, the first tube body 51 in the plunger 50 and the The shoulder 55 is formed between the 2nd tubular bodies 52, The plug means 56 has a bell shape in which a central portion is recessed, and the recessed portion 561 is inserted into and coupled to the head tube of the first tube 51 so that the recessed portion 561 faces the outlet port 231. A stepped portion 563 is formed at the open end edge 564 of the recessed portion to receive and hold the one end 413 of the needle fixing port 41, and the needle fixing hole of the step portion 563 is formed. An annular groove 565 is formed on an inner surface of the one end portion 413 of the 41 that is in contact with the surroundings. One end 413 of the needle fixing port 41 is provided with a protrusion 412 inserted into the plug means 56, and a protrusion coupled to the annular groove 565 on the protrusion 412. A syringe, characterized in that 415 is formed. The method of claim 9, An annular hook 546 and a protruding edge 547 are formed on the outer circumferential surface 544 of one end 541 of the first tube 51 of the plunger 50, and the annular hook 546 and the protrusion are formed. A cylinder 59 which is slidable along the axial direction in the large diameter portion 22 of the cylinder 20 by the edge 547 is coupled to and fixed to the outside of the outer circumferential surface 544 of the first tube 51. Syringe, characterized in that there is. The method of claim 9, A syringe according to claim 3, wherein obliquely elongated protrusions (58) are formed in the third tube (53) in the vicinity of the third tube (53) on the inner circumferential surface of the second tube (52). The method of claim 9, Coupling edge 545 is formed in the vicinity of the third tube body 53 on the outer circumferential surface of the second tube body 20, and the coupling protrusion edge 545 near the injection port 232 in the cylinder 20. A syringe, characterized in that a second inner convex edge (25) is formed which stops. The method of claim 1, A plurality of ribs 234 are provided along the axial direction on the inner circumferential surface near the spout 231 of the small diameter portion 21 to form a gap 236 between the outside and the cylinder 20. Syringe, characterized in that there is. The method of claim 2, A plurality of coupling ribs 235 are formed on the outer circumferential surface of the small diameter portion 21 so as to extend in the axial direction. The needle means 40 has a cover 43 which is coupled to the outside of the small diameter portion 21 so as to cover the needle 42 exposed outside the spout 231, A syringe, characterized in that the inner circumferential surface of the cover (430) is provided with a plurality of ribs (431) for engaging with the engaging rib (235) of the small diameter portion (21). The method of claim 9, And a cap (57) screwed to an outer circumferential surface of the third tube (53) on the other end (542) of the plunger (50). The method of claim 1, A syringe, characterized in that a plurality of annular flanges (5441) extend in the radial direction on the outer peripheral surface (544) of the plunger (50). The method of claim 2, On the second side face 34 of the needle holding means 30, an annular convex edge 341 inserted into a gap formed between one end 541 of the plunger 50 and the needle holding means 30 protrudes. A syringe, characterized in that it is configured to.