JP5952791B2 - Chemical liquid leakage prevention type needleless infusion connector - Google Patents

Description

  The present invention relates to an infusion connector that can prevent leakage of a chemical solution.

A syringe is a device used to inject a drug solution into a patient. Conventional syringes insert a needle into a patient and inject a medical solution into the body. However, since there is a risk of needle stick accidents, needleless syringes were subsequently developed.
When using this needleless syringe, combine the needleless infusion connector with the medicinal fluid injector, and form the infusate channel inside the needleless infusion connector and the medicinal fluid injector, so that the medicinal solution is passed through the infusible channel. Inject into the patient's body.

U.S. Pat. No. 7,645,274 U.S. Pat. No. 7,815,614

  However, since existing needle-less infusion connectors are inferior in adhesiveness, there is a risk that the chemical solution may leak when removed from the chemical solution injector after injection.

In order to solve the above-described problems, the liquid leakage prevention type needleless infusion connector according to the present invention, an outer cylinder portion, provided inside the outer cylinder portion, and a convex edge on the inner peripheral surface near the bottom end. A tube comprising a conduit to be provided;
A movable member having a hollow shape, movably attached to the inside of the tube, and provided around the conduit;
The lower compression pipe, the columnar part, and the upper compression pipe are sequentially installed inside the tube so as to be compressible, and a lower bar is provided inside the lower compression pipe, and the columnar part At least one through hole for communicating the inside of the lower compression pipe with the inside of the upper compression pipe, and the lower compression pipe is in close contact with the outer peripheral surface of the conduit of the tube, A rod is inserted into the conduit of the tube, a passage is formed between the lower rod and the conduit so as not to communicate with the inside of the upper compression tube, and the outer peripheral surface of the bottom end of the lower rod is the conduit An elastic member in which the opening at the bottom end of the conduit is sealed by being in contact with the convex edge of
A cap attached to the upper end of the tube and exhibiting a hollow shape;
The elastic member is in contact with the cap and the moving member, and an upper bar is installed inside the upper compression tube so that the through hole of the columnar portion does not communicate with the inside of the cap. is there.

In such a liquid leakage prevention type needleless infusion connector, an annular portion is provided between the outer tube portion and the conduit in the tube, and a plurality of positioning holes are formed in the annular portion,
Preferably, the moving member includes a ring, and a plurality of positioning ribs are provided on the bottom surface of the ring, and the positioning ribs are inserted so as to correspond to the positioning holes of the annular portion of the tube. .

  In such a chemical liquid leakage prevention type needleless infusion connector, the cap may be provided with a connecting pipe at the upper end and an annular block inserted into the upper end of the outer tube portion of the tube at the bottom end. preferable.

In such a chemical liquid leakage prevention type needleless infusion connector, a through-hole is formed in the columnar portion of the elastic member, and the upper end of the lower rod is connected to the inner peripheral surface of the lower end of the through-hole. A plurality of recesses are provided in the peripheral surface, the bottom ends of these recesses penetrate the inside of the lower compression pipe, and a passage formed between the lower bar and the conduit communicates with the recesses,
An upper bar extends downward in the annular block of the cap, and a plurality of grooves are recessed in the outer peripheral surface of the upper bar, and an upper end of the groove communicates with the inside of the connecting pipe. It is preferable that the outer peripheral surface of the bottom end of the elastic member is in contact with the inner peripheral surface of the through hole of the columnar portion of the elastic member, and the inside of the upper compression tube does not communicate with the through hole of the columnar portion.

  In such a chemical liquid leakage prevention type needleless infusion connector, of the four members of the tube, the moving member, the elastic member, and the cap, the lower compression tube, the columnar portion, and the upper compression tube of the elastic member It is preferable that the lower bar, the connecting pipe in the cap, the annular block, and the upper bar are integrally formed.

  In such a chemical liquid leakage prevention type needleless infusion connector, a lower bar extends downward on the bottom surface of the columnar portion of the elastic member, and an upper bar extends upward on the upper surface of the columnar portion, A plurality of through holes are formed in the columnar portion around the lower bar and the upper bar, and a flange is formed at the upper end of a passage formed between the lower bar and the conduit on the outer peripheral surface of the upper end of the lower bar. The passage does not communicate with the through hole, and an enlarged portion is provided at the upper end of the upper bar. The outer peripheral surface of the enlarged portion is in close contact with the inner peripheral surface of the annular block of the cap. It is preferable that the inside of the upper compression tube does not communicate with the inside of the cap.

  In such a chemical liquid leakage prevention type needleless infusion connector, of the four members of the tube, the moving member, the elastic member, and the cap, the lower compression tube, the columnar portion, and the upper compression tube of the elastic member The lower bar and the upper bar are preferably formed integrally.

In such a chemical liquid leakage prevention type needleless infusion connector, a lower bar extends downward on the bottom surface of the columnar portion of the elastic member, and an upper bar extends upward on the upper surface of the columnar portion, A plurality of through holes are formed around the lower bar 34 and the upper bar 37 in the columnar portion, and an upper end of a passage formed between the lower bar and the conduit on the outer peripheral surface of the upper end of the lower bar A flange is provided, the passage does not communicate with the through-holes, and an enlarged portion is provided at the upper end of the upper bar,
It is preferable that an edge protrusion protrudes from the inner peripheral surface of the annular block of the cap, the outer peripheral surface of the enlarged portion of the upper bar is in close contact with the edge protrusion, and the inside of the upper compression tube does not communicate with the cap.

  In the connector for infusion without a liquid of this type that prevents leakage of chemical liquid, the lower compression tube and the columnar portion of the elastic member among the five members of the tube, the moving member, the elastic member, the upper bar, and the cap, The upper compression tube and the lower bar are preferably formed integrally.

In such a chemical liquid leakage prevention type needleless infusion connector, each of the lower compression tube and the upper compression tube of the elastic member is provided with a plate at the upper end, a hole is formed in the plate, and a lower bar is formed on the bottom surface of the columnar portion. Is extended downward, an upper bar is extended upward on the upper surface of the columnar part, and a plurality of through holes are formed around the lower bar and the upper bar in the columnar part,
The upper end of the conduit of the tube is in close contact with the plate of the lower compression tube, and the plate is in contact with the columnar portion to seal the through hole, and is formed between the lower bar and the conduit. The passage does not communicate with the through hole,
An enlarged portion is provided at the upper end of the upper bar, the outer peripheral surface of the enlarged portion is in close contact with the inner peripheral surface of the hole of the plate of the upper compression tube, and the inside of the upper compression tube does not communicate with the inside of the cap It is preferable.

  In the connector for infusion of needleless liquid medicine of such a chemical liquid leakage prevention type, the lower bar and the upper bar among the six members of the tube, the moving member, the lower compression tube, the columnar portion, the upper compression tube, and the cap. Is preferably formed integrally with the columnar portion.

  The needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention has the above-described configuration, so that when removing it from the chemical liquid injector, a negative pressure is generated inside the needle-less infusion connector, and suction force is generated. In addition, the compression tube is stretched by its own elastic force and returns to its original shape and seals the infusion passage, thereby preventing leakage of the chemical solution.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a first embodiment of a chemical liquid leakage prevention type needleless infusion connector according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a first embodiment of a needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention. 1 is a partial cross-sectional exploded perspective view of a first embodiment of a needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention. It is sectional drawing of the 1st Example of the connector for infusion solutions of a chemical | medical solution leak prevention type which concerns on this invention. It is sectional drawing which shows the use condition of the 1st Example of the chemical | medical solution leakage prevention type needleless infusion connector which concerns on this invention. It is a perspective view which shows the operation | movement attached to a syringe in the 1st Example of the connector for infusion solutions of a chemical | medical solution leak prevention type which concerns on this invention. It is a perspective view which shows the chemical | medical solution injection device attached to the connector for needleless infusion of the chemical | medical solution leak prevention type couple | bonded with the syringe. It is sectional drawing which shows the use condition attached to a syringe and a chemical | medical solution injector in the 1st Example of the connector for needleless infusion of the chemical | medical solution leak prevention type which concerns on this invention. It is sectional drawing which shows the use condition attached to a syringe and a chemical | medical solution injector in the 1st Example of the connector for needleless infusion of the chemical | medical solution leak prevention type which concerns on this invention. It is sectional drawing which shows the use condition attached to a syringe and a chemical | medical solution injector in the 1st Example of the connector for needleless infusion of the chemical | medical solution leak prevention type which concerns on this invention. FIG. 6 is a perspective view of a second embodiment of the needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention. It is a partial cross-section disassembled perspective view of the second embodiment of the needleless infusion connector of the chemical liquid leakage prevention type according to the present invention. It is sectional drawing of the 2nd Example of the chemical | medical solution leakage prevention type needleless infusion connector which concerns on this invention. It is sectional drawing which shows the use condition of the 2nd Example of the chemical | medical solution leakage prevention type needleless infusion connector which concerns on this invention. It is sectional drawing which shows the use condition attached to a syringe and a chemical | medical solution injector in the 2nd Example of the connector for infusion solutions without a needle | hook based on this invention. It is sectional drawing which shows the use condition attached to a syringe and a chemical | medical solution injector in the 2nd Example of the connector for infusion solutions without a needle | hook based on this invention. It is sectional drawing which shows the use condition attached to a syringe and a chemical | medical solution injector in the 2nd Example of the connector for infusion solutions without a needle | hook based on this invention. It is a perspective view of the 3rd Example of the connector for liquid injection preventions of the chemical | medical solution leak prevention type which concerns on this invention. It is a partial cross-section disassembled perspective view of the third embodiment of the needleless infusion connector of the chemical liquid leakage prevention type according to the present invention. It is sectional drawing of the 3rd Example of the chemical | medical solution leakage prevention type needleless infusion connector which concerns on this invention. It is sectional drawing which shows the use condition of the 3rd Example of the chemical | medical solution leakage prevention type needleless infusion connector which concerns on this invention. It is a disassembled perspective view of 4th Example of the chemical | medical solution leak prevention type needleless infusion connector which concerns on this invention. FIG. 9 is a partial cross-sectional exploded perspective view of a fourth embodiment of the needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention. It is sectional drawing of 4th Example of the chemical | medical solution leak prevention type needleless infusion connector which concerns on this invention. It is sectional drawing which shows the use condition of 4th Example of the chemical | medical solution leakage prevention type needleless infusion connector which concerns on this invention. FIG. 3 is a perspective view showing an example in which the upper compression tube and the lower compression tube have spherical walls in the first embodiment of the needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention. FIG. 7 is a perspective view showing an example in which the upper compression tube and the lower compression tube are provided with spherical walls in the second embodiment of the needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention. FIG. 10 is a perspective view showing an example in which the upper compression tube and the lower compression tube have spherical walls in the third embodiment of the needle-free infusion connector of the chemical liquid leakage prevention type according to the present invention. FIG. 10 is a perspective view showing an example in which the upper compression tube and the lower compression tube are provided with spherical walls in the fourth embodiment of the needle leakage infusion connector of the chemical liquid leakage prevention type according to the present invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described in detail with reference to the accompanying drawings.

  As shown in FIGS. 1 to 4, the chemical liquid leakage prevention type needleless infusion connector according to the present invention includes a tube 10, a moving member 20, an elastic member 30, and a cap 40.

  The tube 10 includes an outer cylinder part 11, an inner screw 111 is formed at the bottom end of the outer cylinder part 11, and a conduit 12 is provided inside the outer cylinder part 11 and in the vicinity of the inner screw 111, A convex edge 121 is provided on the inner peripheral surface near the bottom end of the conduit 12, an annular portion 13 is provided between the outer cylinder portion 11 and the conduit 12, and a plurality of positioning holes 131 are spaced from the annular portion 13. Formed. The positioning holes 131 are formed along the axial direction of the tube 10.

  The moving member 20 has a hollow shape and includes a ring 21, a first annular groove 211 is recessed in the upper surface of the ring 21, and a plurality of positioning ribs 22 extend at intervals on the bottom surface of the ring 21. Is done. Each of the positioning ribs 22 is inserted so as to correspond to the positioning hole 131 of the annular portion 13.

  The moving member 20 is movably attached to the inside of the tube 10, and a ring 21 is provided around the conduit 12 of the tube 10 so as to be positioned above the annular portion 13. The positioning rib 22 is inserted into the hole 131. According to this structure, the moving member 20 can move only in the axial direction with respect to the tube 10.

  The elastic member 30 includes a lower compression tube 31, a columnar portion 32, and an upper compression tube 33 in order from the bottom to the top. Among them, the lower compression tube 31 and the upper compression tube 33 are deformed when receiving an external force, When released from an external force, it has the property of recovering to its original shape. On the other hand, at least one through hole 321 is formed in the columnar portion 32 along the axial direction, and the inside of the lower compression pipe 31 by the through hole 321 communicates with the inside of the upper compression pipe 33, and further, the lower compression pipe A lower bar 34 having an outer diameter smaller than the inner diameter of the conduit 12 is provided inside the pipe 31.

  The elastic member 30 is disposed inside the tube 10 so as to be compressible so as to be positioned above the moving member 20, and the lower compression tube 31 is in close contact with the outer peripheral surface of the conduit 12 of the tube 10. The bottom end is in close contact with the first annular groove 211 of the ring 21 of the moving member 20, and the upper end outer peripheral surface of the conduit 12 is in close contact with the upper end inner peripheral surface of the lower compression pipe 31. According to this configuration, the space 35 between the lower compression pipe 31 and the conduit 12 does not communicate with the through hole 321 of the columnar part 32.

  When the lower rod 34 is inserted into the conduit 12 of the tube 10, a passage 36 is formed between the lower rod 34 and the conduit 12 so as not to communicate with the inside of the upper compression tube 33. Since the outer peripheral surface of the bottom end of the bar 34 is in contact with the convex edge 121 of the conduit 12, the opening at the bottom end of the conduit 12 is in a sealed state.

  The cap 40 has a hollow shape, a connection pipe 41 is provided at the upper end, an annular block 42 is provided at the bottom end, and an external screw 411 is provided on the outer peripheral surface of the connection pipe 41. The cap 40 is attached to the upper end of the tube 10, and the annular block 42 is inserted inside the upper end of the outer cylinder portion 11 of the tube 10, so that the upper end of the elastic member 30 is the annular block of the cap 40. The through hole 321 of the lower compression pipe 31 of the elastic member 30 is configured not to communicate with the inside of the cap 40.

1 to 5 show a first embodiment according to the present invention.
In this embodiment, an annular engagement ring 112 is provided in the vicinity of the upper end of the inner peripheral surface of the outer cylinder portion 11 in the tube 10, and a plurality of engagement ribs 113 are provided on the inner peripheral surface of the outer cylinder portion 11. Protruding along the direction.

  A lower bar 34 extends downward at the center of the bottom surface of the columnar portion 32 of the elastic member 30, and an upper bar 37 extends upward at the center of the upper surface, and is spaced from the columnar portion 32. In addition, a plurality of through holes 321 are formed around the lower bar 34 and the upper bar 37, the outer peripheral surface of the upper end of the lower bar 34, and the upper end of the passage 36 formed between the lower bar 34 and the conduit 12. Is provided with a flange 341. Therefore, the passage 36 does not communicate with the through hole 321.

The upper bar 37 is located inside the upper compression tube 33 and has an enlarged portion 371 at the upper end. The outer peripheral surface of the enlarged portion 371 is in close contact with the inner peripheral surface of the bottom end of the annular block 42 of the cap 40. Therefore, the inside of the upper compression tube 33 does not communicate with the inside of the cap 40.
The upper compression tube 33 and the lower compression tube 31 may have a wavy wall, and the upper compression tube 330 and the lower compression tube 310 may have a spherical wall as shown in FIG. Good.

  A second annular groove 421 is recessed in the bottom surface of the annular block 42 of the cap 40, and the upper end of the upper compression pipe 33 of the elastic member 30 is brought into contact with the second annular groove 421, and the outer peripheral surface of the annular block 42 Since the annular engaging groove 422 is recessed in the outer peripheral surface of the annular block 42 and the plurality of engaging recessed portions 423 are recessed along the axial direction, the outer cylindrical portion 11 of the tube 10 is engaged. The ring 112 is engaged with the engagement groove 422, and the engagement rib 113 of the outer cylinder portion 11 of the tube 10 is engaged with the engagement recess 423 so that the cap 40 does not fall off. And it is firmly attached to the tube 10 so as not to rotate.

  The first embodiment according to the present invention includes a tube 10, a moving member 20, an elastic member 30, and a cap 40. Among them, the elastic member 30 includes a lower compression tube 31, a columnar portion 32, The upper compression pipe 33, the lower bar 34, and the upper bar 37 are formed integrally.

  As shown in FIG. 6, in the first embodiment, when the chemical liquid leakage prevention type needleless infusion connector according to the present invention is used, first, the cap 40 is formed by screwing the outer screw 411 to the tip of the syringe 50. Install. As shown in FIG. 7, the chemical injectors 60, 60 </ b> A, 60 </ b> B are coupled to the outer cylinder portion 11 of the tube 10 and used according to actual demand.

  As shown in FIGS. 5 to 8, the chemical injector 60 will be described as an example. When the chemical injector 60 is coupled to the tube 10, the chemical injector 60 pushes the positioning rib 22 of the moving member 20 to move the moving member 20. When 20 is moved into the tube 10 and the moving member 20 moves upward with respect to the tube 10, the upper compression tube 33 and the lower compression tube 31 of the elastic member 30 are compressed and deformed. At this time, the bottom end of the lower bar 34 of the elastic member 30 is separated from the convex edge 121 of the conduit 12 of the tube 10, the opening at the bottom end of the conduit 12 is opened, and the flange 341 at the upper end of the lower bar 34 is connected to the lower bar 34. And the passage 36 communicates with the through hole 321 of the columnar portion 32, and the enlarged portion 371 of the upper bar 37 is the inner periphery of the annular block 42 of the cap 40. The interior of the upper compression tube 33 communicates with the interior of the cap 40 away from the surface.

  Further, when the chemical solution injector 60 is screwed into the tube 10, the elastic valve 61 is pushed by inserting the conduit 12 of the tube 10 into the chemical solution injector 60, so that the opening at the bottom end of the conduit 12 is injected with the chemical solution. An infusion path is formed in the inside of the chemical solution leakage prevention type needleless infusion connector and in the inside of the chemical solution injector 60. According to this configuration, as shown in FIG. 9, the medical solution 70 inside the syringe 50 is sequentially connected to the chemical liquid leakage prevention type needleless infusion connector, the chemical solution injector 60, and the chemical solution injector 60. It can be injected through the tube 80 into the patient's body.

As shown in FIGS. 4 and 10, when the injection of the liquid medicine to the patient is completed, the upper liquid compression pipe 33 and the lower compression pipe of the elastic member 30 can be obtained by removing the liquid leakage prevention type needleless infusion connector from the liquid medicine injector 60. Since the upper end of the upper compression pipe 33 is blocked by the cap 40 when the pipe 31 expands by its own elastic force and returns to its original shape, it has the following three adhesion effects.
First, the bottom end of the lower bar 34 of the elastic member 30 is repositioned so as to contact the convex edge 121 of the conduit 12 of the tube 10 to seal the opening at the bottom end of the conduit 12.
Second, the flange 341 at the upper end of the lower bar 34 is repositioned so as to be inserted into the upper end of the passage 36 formed between the lower bar 34 and the conduit 12.
3. Reposition so that the enlarged portion 371 of the upper bar 37 is in close contact with the inner peripheral surface of the annular block 42 of the cap 40.
On the other hand, when the connector for infusion without needle of chemical liquid leakage type is removed from the liquid injector 60, a negative pressure is generated in the elastic member 30 and suction force is generated. Since the chemical solution outside the connector is sucked into the connector, leakage of the chemical solution can be prevented by the three contact structures described above.

11 to 14 show a second embodiment according to the present invention.
A through hole 321A is formed at the center of the lower bar 34A of the elastic member 30A, the upper end of the lower bar 34A is connected to the inner peripheral surface of the lower end of the through hole 321A, and the inner peripheral surface of the through hole 321A is A plurality of recesses 322A whose bottom ends pass through the inside of the lower compression pipe 31A are provided at intervals, and a passage 36A formed between the lower bar 34A and the conduit 12A communicates with these recesses 322A. . Note that the upper compression tube 33A and the lower compression tube 31A may include a wavy wall, and the upper compression tube 330A and the lower compression tube 310A may include a spherical wall as shown in FIG.

  A second annular groove 421A is recessed in the bottom surface of the annular block 42A of the cap 40A, and the upper end of the upper compression tube 33A of the elastic member 30A is brought into contact with the second annular groove 421A, and the inside of the annular block 42A is lowered. The upper bar 43A extends toward the upper surface, and a plurality of groove parts 431A are recessed along the axial direction at intervals on the outer peripheral surface of the upper bar 43A. The groove parts 431A are arranged in an annular shape and have an upper end. Is formed so as to communicate with the inside of the connecting pipe 41A. Further, the upper bar 43A is inserted into the upper compression tube 33A of the elastic member 30A, and the outer peripheral surface of the bottom end of the upper bar 43A is the inner end of the through hole 321A of the columnar portion 32A of the elastic member 30A. In contact with the peripheral surface, according to this configuration, the inside of the upper compression tube 33A does not communicate with the through hole 321A of the columnar portion 32A.

  The second embodiment according to the present invention includes a tube 10A, a moving member 20A, an elastic member 30A, and a cap 40A. Among them, the elastic member 30A includes a lower compression tube 31A, a columnar portion 32A, and an upper portion. The compression pipe 33A and the lower bar 34A are formed integrally, and the cap 40A includes a connecting pipe 41A, an annular block 42A, and an upper bar 43A, which are formed integrally.

  As shown in FIG. 7, in the second embodiment, when the chemical liquid leakage prevention type needleless infusion connector according to the present invention is used, the syringe 50 is used by being coupled to the chemical liquid injectors 60, 60A, 60B. .

  As shown in FIGS. 14 and 15, the chemical injector 60 will be described as an example. When the chemical injector 60 is coupled to the tube 10A, the chemical injector 60 pushes the moving member 20A and moves relative to the tube 10A. The upper compression tube 33A and the lower compression tube 31A of the elastic member 30A are compressed by the moving member 20A. At this time, the bottom end of the lower bar 34A of the elastic member 30A is separated from the convex edge 121A of the conduit 12A of the tube 10A, and the opening of the bottom end of the conduit 12A is opened to communicate with the inside of the chemical injector 60. Further, the outer peripheral surface of the bottom end of the upper rod 43A of the cap 40A is separated from the inner peripheral surface of the through hole 321A of the columnar portion 32A of the elastic member 30A, and the inside of the upper compression tube 33A is columnar via the groove portion 431A of the upper rod 43A. It comes to communicate with the through hole 321A of the portion 32A. According to this configuration, since the infusion passage in the chemical liquid leakage prevention type needleless infusion connector and the inside of the medicinal solution injector 60 communicate with each other, as shown in FIG. It can be injected into the patient's body through a connector for infusion without needle of chemical liquid leakage type, a chemical liquid injector 60, and an infusion pipe 80 connected to the chemical liquid injector 60.

As shown in FIG. 13 and FIG. 17, when the injection of the chemical liquid into the patient is completed, the upper compression tube 33 </ b> A and the lower compression of the elastic member 30 </ b> A can be obtained by removing the liquid leakage prevention type needleless infusion connector from the chemical liquid injector 60. Since the upper end of the upper compression pipe 33A is blocked by the cap 40A when the pipe 31A expands by its own elastic force and returns to its original shape, the following three adhesion effects are obtained.
First, the bottom end of the lower bar 34A of the elastic member 30A is repositioned so as to contact the convex edge 121 of the conduit 12A of the tube 10A, and the opening at the bottom end of the conduit 12A is sealed.
Second, the inner peripheral surface of the lower compression tube 31A of the elastic member 30A is restored while being in close contact with the outer peripheral surface of the conduit 12A.
Third, the bottom end of the upper bar 43A of the cap 40A is repositioned so as to be in close contact with the inner peripheral surface of the through hole 321A of the columnar portion 32A of the elastic member 30A.
In addition, the liquid leakage prevention type needleless infusion connector generates a suction force due to the negative pressure generated inside, so the liquid outside the chemical liquid leakage prevention type needleless infusion connector is sucked into the inside. Therefore, the chemical solution can be prevented from leaking by the three contact structures described above.

18 to 21 show a third embodiment according to the present invention.
A lower bar 34B extends in the center of the bottom surface of the columnar part 32B of the elastic member 30B, and a plurality of through holes 321B are formed in the columnar part 32B and around the lower bar 34B at intervals, the lower bar 34B. A flange 341B is provided on the outer peripheral surface of the upper end of the pipe, and the flange 341B is inserted into the upper end of a passage 36B formed between the lower bar 34B and the conduit 12B. The passage 36B communicates with the through hole 321B. It has a configuration that does not.

  In addition, an upper bar 37B is attached upward to the center of the upper surface of the columnar part 32B. The upper bar 37B is located inside the upper compression tube 33B, and an enlarged part 371B is provided at the upper end. Note that the upper compression tube 33B and the lower compression tube 31B may have a wave-like wall, and the upper compression tubes 330B and 310B may have a spherical wall as shown in FIG.

  A second annular groove 421B is recessed in the bottom surface of the annular block 42B of the cap 40B, and the upper end of the upper compression pipe 33B of the elastic member 30B is abutted against the second annular groove 421B, and the inner peripheral surface of the annular block 42B. An edge protrusion 424B is projected from the bottom end of the upper portion of the upper bar 37B. According to this configuration, the outer peripheral surface of the enlarged portion 371B of the upper bar 37B is in close contact with the edge protrusion 424B. Do not communicate.

  The third embodiment according to the present invention includes a tube 10B, a moving member 20B, an elastic member 30, an upper bar 37B, and a cap 40B, of which a lower compression tube 31B in the elastic member 30B and a columnar shape. The portion 32B, the upper compression tube 33B, and the lower bar 34B are integrally formed.

  As shown in FIG. 7, the third embodiment of the needle-less infusion connector of the chemical liquid leakage prevention type according to the present invention uses the syringe 50 coupled to the chemical liquid injectors 60, 60A, 60B when used.

  As illustrated in FIG. 21, the chemical injector 60 will be described as an example. When the chemical injector 60 is coupled to the tube 10B, the chemical injector 60 pushes the moving member 20B and moves relative to the tube 10B. The upper compression tube 33B and the lower compression tube 31B of the elastic member 30B are compressed by the member 20B. At this time, the bottom end of the lower bar 34B of the elastic member 30B is separated from the convex edge 121B of the conduit 12B of the tube 10B, and the opening at the bottom end of the conduit 12B is opened to communicate with the inside of the chemical solution injector 60. The flange 341B at the upper end of the lower bar 34B is separated from the upper end of the passage 36B formed between the lower bar 34B and the conduit 12B, and the passage 36B communicates with the through hole 321B of the columnar portion 32B. The enlarged portion 371B of 37B is separated from the edge protrusion 424B of the annular block 42B of the cap 40B, so that the inside of the upper compression tube 33B communicates with the inside of the cap 40B. According to this configuration, since the infusion passage is in communication with the inside of the chemical liquid leakage prevention type needleless infusion connector and the inside of the chemical injector 60, a passage for injecting the chemical is formed.

As shown in FIG. 20, when the injection of the liquid medicine into the patient is completed, the liquid leakage prevention type needleless infusion connector is removed from the liquid injector 60, and at this time, the upper compression pipe 33B and the lower compression pipe of the elastic member 30B are removed. Since 31B expands by its own elastic force and returns to its original shape, the upper end of the upper compression tube 33B is blocked by the cap 40B, and thus has the following three adhesion effects.
First, the bottom end of the lower bar 34B of the elastic member 30B is repositioned so as to contact the convex edge 121 of the conduit 12B of the tube 10B, and the opening at the bottom end of the conduit 12A is sealed.
Second, the flange 341B at the upper end of the lower bar 34B is repositioned so as to be inserted into the upper end of the passage 36B formed between the lower bar 34B and the conduit 12B.
Third, the enlarged portion 371B of the upper bar 37B is repositioned so as to be in close contact with the edge protrusion 424B of the annular block 42B of the cap 40B.
In addition, the chemical leakage prevention type needleless infusion connector generates a negative pressure inside it and generates a suction force, so the chemical solution outside the chemical leakage prevention type needleless infusion connector is sucked into the inside. The leakage of the chemical solution can be prevented by the three close contact structures described above.

22 to 23 show a fourth embodiment according to the present invention.
The lower compression tube 31C in the elastic member 30C is installed between the moving member 20C and the columnar portion 32C, and the upper compression tube 33C is installed between the columnar portion 32C and the cap 40C, and the lower compression tube 31C. A plate 311C is provided at the upper end of the plate, a hole 312C is formed at the center of the plate 311C, a plate 331C is provided at the upper end of the upper compression tube 33C, and a hole 332C is formed at the center of the plate 331C. A lower bar 34C extends downward in the center of the bottom of the columnar part 32C, and an upper bar 37C extends upward in the center of the upper surface of the columnar part 32C. A plurality of through holes 321C are formed around 34C and upper bar 37C at intervals.

The upper end of the conduit 12 of the tube 10 is in close contact with the bottom surface of the plate 311C of the lower compression pipe 31C, and the plate 311C is in contact with the columnar portion 32C to seal the bottom end of the through hole 321C. A passage 36C formed between the lower bar 34C and the conduit 12 does not communicate with the through hole 321C.
The upper bar 37C is located inside the upper compression tube 33C, and an enlarged portion 371C is provided at the upper end, and the outer peripheral surface of the enlarged portion 371C is on the inner peripheral surface of the hole 332C of the plate 331C of the upper compression tube 33C. Since the contact is made while abutting, the inside of the upper compression tube 33C does not communicate with the inside of the cap 40C.

  Note that the upper compression tube 33C and the lower compression tube 31C may have a wavy wall, and the upper compression tube 330C and the lower compression tube 310C may have a spherical wall as shown in FIG.

  The fourth embodiment according to the present invention includes a tube 10C, a moving member 20C, a lower compression tube 31C, a columnar portion 32C, an upper compression tube 33C, and a cap 40C, of which a lower bar 34C and The upper bar 37C is formed integrally with the columnar portion 32C.

  As shown in FIG. 7, in the fourth embodiment of the chemical liquid leakage prevention type needleless infusion connector according to the present invention, the syringe 50 is used by being connected to the chemical liquid injectors 60, 60A, 60B when used.

  As shown in FIG. 25, the chemical injector 60 will be described as an example. When the chemical injector 60 is coupled to the tube 10C, the chemical injector 60 pushes the moving member 20C and moves relative to the tube 10C. The upper compression tube 33C and the lower compression tube 31C of the elastic member 30C are compressed by the moving member 20C. At this time, the bottom end of the lower bar 34C of the elastic member 30C is separated from the convex edge 121C of the conduit 12C of the tube 10C, and the opening of the bottom end of the conduit 12C is opened to communicate with the inside of the chemical solution injector 60. The upper end of the conduit 12 of the tube 10 is separated from the plate 311C of the lower compression tube 31C, and a passage 36C formed between the lower bar 34C and the conduit 12C is a columnar portion via the hole 312C of the plate 311C of the lower compression tube 31C. In addition, the enlarged portion 371C of the upper rod 37C is separated from the inner peripheral surface of the hole 332C of the plate 331C of the upper compression tube 33C, and the inside of the upper compression tube 33C is connected to the cap 40C. According to this configuration, the inside of the chemical liquid leakage prevention type needleless infusion connector and the inside of the chemical solution injector 60 are communicated. Since passage communicating passage for injecting a drug solution is formed.

As shown in FIG. 24, when the injection of the liquid medicine into the patient is completed, the liquid leakage prevention type needleless infusion connector is removed from the liquid injector 60, and at this time, the upper compression pipe 33C and the lower compression pipe of the elastic member 30C are removed. Since 31C expands by its own elastic force and returns to its original shape and the upper end of its upper compression pipe 33C is blocked by the cap 40C, it has the following three adhesion effects.
First, the bottom end of the lower bar 34C of the elastic member 30C is repositioned so as to contact the bottom end of the conduit 12C of the tube 10C, and the opening at the bottom end of the conduit 12C is sealed.
Second, the upper end of the conduit 12C is restored while contacting the plate 311C of the lower compression tube 31C.
3. The enlarged portion 371C of the upper bar 37C is restored while contacting the inner peripheral surface of the hole 332C of the plate 331C of the upper compression tube 33C.
In addition, since negative pressure is generated inside the connector for infusionless needles of the chemical solution leakage prevention type and suction force is generated, the chemical solution outside the connector for infusionless needles of the chemical solution leakage prevention type is sucked into the inside. The leakage of the chemical solution can be prevented by the three close contact structures.

  As described above, in the chemical liquid leakage prevention type needleless infusion connector according to the present invention, it is possible to prevent the needle stick accident of the syringe and also solve the problem of chemical liquid leakage. Are better.

DESCRIPTION OF SYMBOLS 10 Tube 11 Outer cylinder part 12 Conduit 121 Convex edge 20 Moving member 30 Elastic member 31 Lower compression pipe 32 Columnar part 321 Through-hole 33 Upper compression pipe 34 Lower bar 36 Passage 37 Upper bar 40 Cap

Claims (7)

A tube comprising an outer cylinder part and a conduit provided inside the outer cylinder part and having a convex edge on the inner peripheral surface near the bottom end;
A movable member having a hollow shape, movably attached to the inside of the tube, and provided around the conduit;
The lower compression pipe, the columnar part, and the upper compression pipe are sequentially installed inside the tube so as to be compressible, and a lower bar is provided inside the lower compression pipe, and the columnar part At least one through hole for communicating the inside of the lower compression pipe with the inside of the upper compression pipe, and the lower compression pipe is in close contact with the outer peripheral surface of the conduit of the tube, A rod is inserted into the conduit of the tube, a passage is formed between the lower rod and the conduit so as not to communicate with the inside of the upper compression tube, and the outer peripheral surface of the bottom end of the lower rod is the conduit An elastic member in which the opening at the bottom end of the conduit is sealed by being in contact with the convex edge of
A cap attached to the upper end of the tube and exhibiting a hollow shape;
The elastic member is in contact with the cap and the moving member, respectively, and an upper bar is installed inside the upper compression tube so that the through hole of the columnar portion does not communicate with the inside of the cap .
An annular portion is provided between the outer cylinder portion and the conduit in the tube, and a plurality of positioning holes are formed in the annular portion,
The moving member includes a ring, and a plurality of positioning ribs are extended on the bottom surface of the ring, and the positioning ribs are inserted so as to correspond to the positioning holes of the annular portion of the tube,
The cap is provided with a connecting pipe at the upper end, and at the bottom end is provided with an annular block inserted into the upper end of the outer tube portion of the tube,
An enlarged portion is provided at the upper end of the upper bar, the outer peripheral surface of the enlarged portion is in close contact with the inner peripheral surface of the annular block of the cap, and the interior of the upper compression tube does not communicate with the interior of the cap,
The lower compression tube, the columnar portion, the upper compression tube, and the lower bar in the elastic member are integrally formed,
A first annular groove is recessed on the upper surface of the ring, and the bottom end of the lower compression tube is in close contact with the first annular groove of the ring of the moving member,
Second annular groove is recessed into the bottom surface of the annular block of said cap, said second annular groove in the elastic chemical leakproof type needleless infusion upper end of the upper compression tube, characterized in Rukoto the abutment member Connector. A through hole is formed in the columnar portion of the elastic member, the upper end of the lower rod is connected to the inner peripheral surface of the lower end of the through hole, and a plurality of recesses are formed in the inner peripheral surface of the through hole. A bottom end of the recess penetrates the inside of the lower compression pipe, and a passage formed between the lower bar and the conduit communicates with the recess;
An upper bar extends downward in the annular block of the cap, and a plurality of grooves are recessed in the outer peripheral surface of the upper bar, and an upper end of the groove communicates with the inside of the connecting pipe. the outer peripheral surface of the end bottom in contact with the inner peripheral surface of the through hole of the columnar portion of the elastic member, according to claim 1, characterized in that the interior of the upper compression tube does not penetrate hole communicating with the columnar portion of the A connector for needle-free infusions that prevents chemical leakage. Of the four members, the tube, the moving member, the elastic member, and the cap, the lower compression tube, the columnar portion, the upper compression tube, the lower bar, and the connecting tube of the cap, in the elastic member, The annular block and the upper bar are formed integrally with each other, and the liquid leakage prevention type needleless infusion connector according to claim 2 . A lower bar extends downward on the bottom surface of the columnar portion of the elastic member, an upper bar extends upward on the upper surface of the columnar portion, and the lower rod and the upper rod in the columnar portion are A plurality of through holes are formed around the flange, and a flange is provided at an upper end of a passage formed between the lower rod and the conduit on an outer peripheral surface of the upper end of the lower rod, and the passage communicates with the through hole. Further, an enlarged portion is provided at the upper end of the upper bar, the outer peripheral surface of the enlarged portion is in close contact with the inner peripheral surface of the annular block of the cap, and the inside of the upper compression tube communicates with the inside of the cap. The chemical liquid leakage prevention type needleless infusion connector according to claim 1 , wherein Of the four members of the tube, the moving member, the elastic member, and the cap, the lower compression tube, the columnar portion, the upper compression tube, the lower bar, and the upper bar of the elastic member are integrated. 5. The medical fluid leakage prevention type needleless infusion connector according to claim 4 , which is molded. A lower bar extends downward on the bottom surface of the columnar part of the elastic member, and an upper bar extends upward on the upper surface of the columnar part. The lower bar 34 and the upper bar in the columnar part. A plurality of through holes are formed around 37, and a flange is provided at an upper end of a passage formed between the lower rod and the conduit on the outer peripheral surface of the upper end of the lower rod, and the passage passes through the through holes. It does not communicate with the hole, and is further provided with an enlarged portion at the upper end of the upper bar,
An edge protrusion protrudes from the inner peripheral surface of the annular block of the cap, the outer peripheral surface of the enlarged portion of the upper bar is in close contact with the edge protrusion, and the inside of the upper compression tube does not communicate with the cap. The medical liquid leakage prevention type needleless infusion connector according to claim 1 . Each of the lower compression tube and the upper compression tube of the elastic member is provided with plates at the upper ends, holes are formed in the plates, and a lower bar extends downward from the bottom surface of the columnar portion. An upper bar extends upward on the upper surface, and a plurality of through holes are formed around the lower bar and the upper bar in the columnar portion,
The upper end of the conduit of the tube is in close contact with the plate of the lower compression tube, and the plate is in contact with the columnar portion to seal the through hole, and is formed between the lower bar and the conduit. 2. The needleless infusion connector according to claim 1 , wherein the passage does not communicate with the through hole.

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