TWM488317U - Male luer connector that prevents leakage of liquid medicine - Google Patents

Description

Male luer connector for preventing leakage of liquid medicine

This creation is about a male luer connector, especially a male luer connector that can prevent leakage of liquid medicine.

The male luer connector is a liquid chemical injector that is coupled to a female luer connector to form an infusion into the interior of the male luer connector and the interior of the female luer connector. The flow channel can provide the circulation of the drug solution, so that the drug solution can be smoothly injected into the patient.

The prior art male luer connector, as shown in FIG. 15 and FIG. 16, is the invention patent No. 7,645,274, which is provided with a resilient valve 81 and a moving member 82 on a connecting base 80. The elastic valve 81 is provided with a slit 811 which is in a normally closed state. The moving member 82 has a hollow rod body 821. One end of the rod body 821 is a closed end, and the other end is an open end, and the rod body 821 is closed. A through hole 822 is formed in the side wall of the end, the open end of the rod body 821 corresponds to the slit 811 of the elastic valve 81, and the outer side of the rod body 821 is formed with a ring side wall 823, and a sleeve 83 is sleeved on the elastic valve 81 and The outer side of the moving member 82 is fixed to the connecting seat 80. The sleeve 83 has an outer tube 831. The outer tube 831 has a hollow duct 832 formed therein. The duct 832 has an outer opening 833 and an inner opening 834. The rod 821 of the moving member 82 is received in the duct 832 of the sleeve 83. The end of the closed end of the rod 821 is engaged in the opening 833 outside the duct 832, so that the outer opening 833 is closed, and the moving member 82 is closed. The ring side wall 823 is received between the tube 831 and the conduit 832 outside the sleeve 83.

Referring to FIG. 17, the prior art male luer connector is used to thread the female luer connector 90 into the outer tube 831 of the sleeve 83 to push against the ring side wall 823 of the moving member 82. The moving member 82 is moved relative to the sleeve 83, so that the end of the closed end of the rod 821 of the moving member 82 will be away from the opening 833 outside the duct 832 of the sleeve 83, thereby making the outer opening 833 open, and the elastic valve 81 is compressed and deformed by the pushing of the moving member 82, and the rod 821 of the moving member 82 is inserted into the slit 811 of the elastic valve 81, so that the slit 811 is opened, whereby the inside and the mother of the male luer connector The inside of the Luer connector 90 is formed with an infusion flow path through which the medical fluid can flow; when the female luer connector 90 is detached from the male luer connector, the elastic valve 81 is provided with a recovery elastic force to push the top. The moving member 82 resets the moving member 82, so that the rod 821 of the moving member 82 will be away from the slit 811 of the elastic valve 81, and the slit 811 can be returned to the closed state by itself. Finally, the closed end of the rod 821 of the moving member 82 is closed. The end portion will be engaged with the opening 833 outside the conduit 832 of the sleeve 83, so that the outer opening 833 is returned. Closed state.

However, the above-mentioned male luer connector has the following disadvantages in practical use:

1. When the end of the closed end of the rod 821 of the moving member 82 returns to the opening 833 outside the duct 832 of the sleeve 83, the end of the closed end of the rod 821 will remain inside the duct 832 of the sleeve 83. The liquid is pushed to the outside of the catheter 832 of the sleeve 83, causing a loss of leakage of the liquid.

2. When the connecting base 80 is connected to the syringe, if the syringe is slightly pressed against the connecting seat 80, the slit 811 of the elastic valve 81 is likely to be opened, and the chemical liquid is leaked.

In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a male luer connector for preventing leakage of a liquid medicine. By designing two elastic valves, a sealing effect can be separately provided, thereby effectively preventing leakage of the liquid medicine.

In order to achieve the above-mentioned creative purpose, the male luer connector designed to prevent leakage of liquid medicine includes a connecting seat, a first elastic valve, a moving member, a second elastic valve and a sleeve. Wherein: the connecting seat is provided with a hollow protrusion, the inside of the protruding post is formed with a cavity, the side wall of the stud is inserted through a through hole, the perforation is communicated with the chamber; the first elastic valve is in a compressible middle An empty tube body, one end of the first elastic valve is sleeved on the outer side of the protruding post of the connecting seat, so that the perforation of the protruding post is closed; the moving member is a hollow body, and one end of the moving member is inserted into the first elastic valve One end; the second elastic valve is a hollow tube body, the second elastic valve has an open end at one end, and the other end of the second elastic valve is a closed end and is provided with a slit, the slit is in a normally closed state, the first The two elastic valve sleeves are tightly sleeved on the other end of the moving member; the sleeve is sleeved on the outer side of the first elastic valve, the moving member and the second elastic valve and is connected to the connecting seat.

The male luer connector for preventing leakage of the liquid medicine, wherein: the first elastic valve is sequentially formed with a wave segment, a ring segment and a straight pipe segment, and the wave segment is sleeved on the protruding post of the connecting seat An outer side; a protruding tube protrudes from one end of the moving member, and a connecting tube protrudes from the other end, the inside of the connecting tube communicates with the inside of the connecting tube and forms a passage, and the moving member is inserted into the cannula provided The inner portion of the straight pipe section of the elastic valve; the second elastic valve sleeve is sleeved on the outer side of the connecting piece of the moving member, so that the slit of the second elastic valve corresponds to the passage of the moving member.

The male luer connector for preventing leakage of a liquid medicine, wherein the sleeve has an outer tube, and a hollow tube is formed inside the outer tube, the tube has an outer opening and an inner opening in the inner tube a ring groove is formed on the side of the sleeve; a limiting tube is formed on the outer circumference of the connecting portion of the moving member, the limiting tube is accommodated between the tube and the tube outside the sleeve; and a ring is protruded from the outer side of the second elastic valve The second elastic valve is received in the conduit of the sleeve, the ring system of the second elastic valve is received in the annular groove of the conduit, and the closed end of the second elastic valve is engaged in the opening outside the conduit, so that The outer opening is closed.

The male luer connector for preventing leakage of the liquid medicine, wherein one end of the connecting seat protrudes from a hollow sleeve, and the other end protrudes from the protruding post, and a through hole is formed in the sleeve, the protruding post One end of the chamber is an open end and communicates with the through hole, and a ring side wall is formed on the outer periphery of the stud. A space is formed between the side wall of the ring and the stud, and the first elastic valve is disposed in the space. In the slot.

The male luer connector for preventing leakage of the liquid medicine, wherein: a ring groove is formed on an outer circumference of the side wall of the ring of the connecting seat, and a ring hook portion is protruded from the groove wall of the ring groove; The tube is formed with a looping portion, and the sleeve is fastened to the loop hook portion of the ring groove of the connecting seat by the looping portion.

The male luer connector for preventing leakage of the liquid medicine, wherein: the outer side surface of the ring side wall of the connecting seat is recessed with an annular outer ring groove, and the inner side surface of the ring side wall is concavely provided with a ring shape. The inner ring groove; an outer ring protrusion protruding from the inner side surface of the outer tube of the sleeve; an inner tube is formed inside the outer tube of the sleeve, and an outer surface of the inner tube protrudes and has a ring shape The inner ring protrusions are respectively sleeved by the outer ring protrusions and the inner ring protrusions to be engaged with the outer ring groove and the inner ring groove of the connecting seat.

The male luer connector for preventing leakage of the liquid medicine, wherein: the outer side surface of the ring side wall of the connecting seat is concavely provided with two axial grooves; the inner side of the outer tube of the sleeve protrudes with six axial directions The sleeve is formed by two axial grooves in which the two axial projections are correspondingly buckled to the connecting seat.

The advantages and enhancements that can be obtained from the public luer connector provided by this creation to prevent leakage of liquid medicine include at least:

1. When the female luer connector is detached from the male luer connector, the negative pressure suction generated inside the male luer connector allows the liquid medicine remaining inside the sleeve of the sleeve to flow through the slit of the second elastic valve. The inside of the male luer connector, so that the second elastic valve does not push the liquid to the outside of the sleeve, and when the insert of the female luer connector exits the slit of the second elastic valve, the two slits The side will scrape the liquid on the outer side of the insert of the female luer connector, thereby effectively preventing the leakage of the liquid.

2. Since the first elastic valve can surely cover the boss of the connecting seat to close the perforation of the stud, when the connecting rod is connected to the syringe, if the syringe is slightly pressed against the connecting seat, the stud is not caused. The perforations are open, thereby preventing leakage of the liquid medicine.

Referring to FIG. 1 to FIG. 3, the male luer connector for preventing leakage of the liquid medicine comprises a connecting base 10, a first elastic valve 20, a moving member 30 and a second elastic valve. 40 and a sleeve 50, wherein:

The connecting seat 10 is a hollow body having a hollow sleeve 11 at one end and a hollow boss 12 at the other end. The sleeve 11 is internally formed with a through hole 111, and a cavity is formed inside the sleeve 12. The chamber 121 has one end of the chamber 121 as an open end and communicates with the through hole 111. The other end of the chamber 121 is a closed end. A through hole is formed in the side wall of the stud 12 and at the closed end of the chamber 121. 122, the through hole 122 is connected to the chamber 121, and a ring sidewall 13 is formed on the outer periphery of the stud 12, and a recess 14 is formed between the ring sidewall 13 and the stud 12;

The first elastic valve 20 is a compressible hollow tube body, which is formed with a wave segment 21, a ring segment 22 and a straight pipe segment 23 in sequence. The radial thickness of the wave segment 21 is larger than the diameter of the ring segment 22. The first elastic valve 20 is disposed in the cavity 14 between the stud 12 and the ring sidewall 13 of the connecting seat 10, and the wave segment 21 is sleeved on the outer side of the stud 12 of the connecting base 10. The perforation 122 of the stud 12 is closed;

The moving member 30 is a hollow body having a cannula 31 protruding at one end and a connecting tube 32 protruding from the other end. The inside of the cannula 31 communicates with the inside of the connecting tube 32 to form a channel 33, and the cannula 31 A recess 311 is defined in the recess of the tube wall, and a limiting tube 34 is formed on the outer periphery of the connecting tube 32. The tube wall of the limiting tube 34 is recessed with at least one axial limiting slot 341, and the moving member 30 is The cannula 31 is inserted into the inner portion of the straight pipe section 23 of the first elastic valve 20 such that the notch 311 of the cannula 31 is located inside the annular segment 22 of the first elastic valve 20;

The second elastic valve 40 is a hollow tubular body having an open end at one end and a closed end at the other end and a slit 41. The slit 41 is in a normally closed state, outside the open end of the second elastic valve 40. a second body valve 40 is tightly sleeved on the outer side of the connecting piece 32 of the moving member 30, so that the slit 41 of the second elastic valve 40 corresponds to the passage 33 of the moving member 30;

The sleeve 50 has an outer tube 51. One end of the outer tube 51 is formed with an internal thread 511. A hollow conduit 52 is formed in the interior of the outer tube 51 adjacent to the internal thread 511. The conduit 52 has an outer opening 521. And an inner opening 522, a ring groove 523 is defined in the inner side surface of the duct 52 adjacent to the inner opening 522, and the axial height of the ring groove 523 is greater than the axial height of the ring body 42 of the second elastic valve 40. At least one limiting block (not shown) is disposed between the outer tube 51 and the conduit 52, and an inner tube 53 is formed at the inner portion of the inner portion of the outer tube 51. The sleeve 50 is sleeved on the connecting base 10. The outer side of the ring side wall 13, the first elastic valve 20, the moving member 30 and the second elastic valve 40, the end edge of the ring side wall 13 of the connecting seat 10 is accommodated between the tube 51 and the inner tube 53 outside the sleeve 50. The second elastic valve 40 is received in the conduit 52 of the sleeve 50. The ring body 42 of the second elastic valve 40 is received in the annular groove 523 of the conduit 52 and abuts against a groove end surface of the annular groove 523, and The closed end of the second elastic valve 40 is engaged with the outer opening 521 of the conduit 52, so that the outer opening 521 is closed, and the limiting tube 34 of the moving member 30 is received outside the sleeve 50. Between the catheter 52 and sleeve 50 of the stopper block is accommodated in a corresponding groove 341 limiting movement of the member 30, thereby limiting movement of member 30 relative to the sleeve 50 can only be displaced axially;

Preferably, the connecting seat 10, the moving member 30 and the sleeve 50 are made of a rigid material, and the first elastic valve 20 and the second elastic valve 30 are made of silicone rubber, and the first elastic valve 20 and the second elastic valve 30 are 30. It can be deformed by external force and restored to its original state after the external force disappears.

Referring to FIG. 3 and FIG. 6, the male luer connector of the present invention is used to couple the external thread of the female luer connector 60 to the inner thread 511 of the tube 51 outside the sleeve 50. To move the moving member 30 axially relative to the sleeve 50, the movable moving member 30 drives the second elastic valve 40 to make the second The closed end of the elastic valve 40 is away from the outer opening 521 of the duct 52 of the sleeve 50, so that the outer opening 521 is in an open state, and the second elastic valve 40 is continuously driven until the ring body 42 of the second elastic valve 40 abuts against The other end face of the ring groove 523 of the sleeve 52 of the sleeve 50, and the moving moving member 30 will also force the ring segment 22 of the first elastic valve 20 to compress and deform. Please refer to FIG. 5 and FIG. The connector 60 continues to rotate in a threaded engagement with respect to the sleeve 50, so that the insert 61 of the female luer connector 60 is inserted into the sleeve 52 of the sleeve 50 from the outer opening 521 and inserted into the slit 41 of the second elastic valve 40 to cut The slit 41 is in an open state, and the moving member 30 that continuously moves forces the ring segment 22 of the first elastic valve 20 to continuously compress and deform to make the wave The segment 21 is also compressed and deformed. Since the compressed wave segment 21 is no longer wrapped around the outer side of the stud 12 of the connecting base 10, the perforation 122 of the stud 12 is opened, whereby the stud of the connecting seat 10 is The chamber 121 of the 12 can communicate with the passage 33 of the moving member 30 through the through hole 122. The passage 33 of the moving member 30 can communicate with the inside of the insert 61 of the female luer connector 60 through the slit 41 of the second elastic valve 40. The inside of the connector and the inside of the female luer connector 60 are formed with an infusion flow path through which the drug solution can flow. The specific embodiment shown in the figure is in the through hole 111 of the sleeve 11 of the connector 10. A syringe 70 is inserted, and the liquid medicine in the syringe 70 can be sequentially injected into the patient through the male luer connector, the female luer connector 60, and the infusion tube (not shown) connected to the female luer connector 60. in vivo.

When the female luer connector 60 is detached from the male luer connector, the wave section 21 of the first elastic valve 20 is provided with a resilient force to be self-extending and re-wrapped to the stud of the connecting base 10. The outer side of the 12, the perforation 122 of the stud 12 of the connecting base 10 is returned to the closed state, and the female luer connector 60 is detached from the male luer connector, and the insert 61 is withdrawn from the second elastic valve 40. The slit 41 of the second elastic valve 40 can be returned to the closed state by itself, and the elastic force of the first elastic valve 20 pushes the moving member 30 to reverse the movement of the moving member 30, and the moving member 30 that moves in the opposite direction will The second elastic valve 40 is driven to engage the closed end of the second elastic valve 40 in the outer opening 521 of the duct 52 of the sleeve 50, thereby closing the outer opening 521.

When the female luer connector 60 is detached from the male luer connector, the inside of the male luer connector generates a vacuum suction force, so that the liquid medicine outside the male luer connector flows to the inside, and the female luer connector 60 At the moment of detachment from the male luer connector, the liquid medicine in the chamber 121 of the stud 12 of the connecting seat 10 can flow into the passage 33 of the moving member 30 through the through hole 122 of the stud 12 and the notch 311 of the moving member 30. When the wave section 21 of the first elastic valve 20 is re-covered on the outer side of the stud 12 of the connecting seat 10, the through hole 122 of the stud 12 will be surely closed, and the negative pressure suction generated inside the male luer connector can be The chemical liquid remaining inside the duct 52 of the sleeve 50 flows into the inside of the male luer connector through the slit 41 of the second elastic valve 40, so that the second elastic valve 40 does not push the liquid to the outside of the sleeve 50. In other words, when the insert 61 of the female luer connector 60 is withdrawn from the slit 41 of the second elastic valve 40, the liquid medicine on the outer side of the insert 61 is scraped off on both sides of the slit 41, thereby effectively preventing leakage of the liquid medicine.

There are various embodiments for the combination of the connector 10 and the sleeve 50 of the present invention. Referring to the embodiment shown in FIGS. 1 to 3, a ring groove is formed on the outer periphery of the ring side wall 13 of the connector 10. A ring hook portion 15 is formed on the groove wall of the groove. The outer tube 51 of the sleeve 50 is formed with a buckle portion 512 at the other end of the tube 51 opposite to the internal thread 511. The sleeve 50 utilizes the buckle portion 512. a hook portion 15 that is fastened to the ring groove of the connecting seat 10;

Referring to the embodiment shown in FIG. 9 to FIG. 11 , the outer side surface of the ring side wall 13A of the connecting seat 10A is recessed with an annular outer ring groove 131A. The inner side surface of the ring side wall 13A is concavely formed in a ring shape. The inner ring groove 132A has an annular outer ring protrusion 512A protruding from the inner side surface of the outer tube 51A of the sleeve 50A, and an annular inner ring protrusion is protruded from the outer side surface of the inner tube 53A of the sleeve 50A. In the block 531A, the sleeve 50A is sleeved on the outer ring groove 131A and the inner ring groove 132A of the connecting seat 10A by the outer ring protrusion 512A and the inner ring protrusion 531A.

Referring to the embodiment shown in FIG. 12 to FIG. 14 , the outer side surface of the ring side wall 13B of the connecting seat 10B is recessed with two axial grooves 131B, and the inner side of the outer tube 51B of the sleeve 50B protrudes with six axes. To the bump 512B, the sleeve 50B utilizes two axial grooves 131B in which the two axial projections 512B are correspondingly engaged with the connecting seat 10B.

10, 10A, 10B‧‧‧ connectors
11‧‧‧ casing
111‧‧‧through hole
12‧‧‧Bump
121‧‧ ‧ room
122‧‧‧Perforation
13, 13A, 13B‧‧‧ ring side wall
131A‧‧‧outer ring groove
132A‧‧‧ Inner ring groove
131B‧‧‧ axial groove
14‧‧‧ 容容
15‧‧‧ring hook
20‧‧‧First elastic valve
21‧‧‧ wave segment
22‧‧‧ ring segment
23‧‧‧ Straight pipe section
30‧‧‧Mobile parts
31‧‧‧Intubation
311‧‧‧ gap
32‧‧‧ take over
33‧‧‧ channel
34‧‧‧Limited tube
341‧‧‧ Limit slot
40‧‧‧Second elastic valve
41‧‧‧ slitting
42‧‧‧Act
50, 50A, 50B‧‧ ‧ sleeve
51, 51A, 51B‧‧‧ outside management
511‧‧‧ internal thread
512‧‧‧ buckle department
512A‧‧‧outer ring bumps
512B‧‧‧Axial bumps
52‧‧‧ catheter
521‧‧‧Outside
Opening within 522‧‧
523‧‧‧ Ring groove
53, 53A‧‧‧ inner management
531A‧‧‧ Inner ring bumps
60‧‧‧Female Luer connector
61‧‧‧plugin
70‧‧‧Syringe
80‧‧‧Connecting Block
81‧‧‧Elastic valve
811‧‧‧ slitting
82‧‧‧Mobile parts
821‧‧‧ rod body
822‧‧‧Perforation
823‧‧‧ ring side wall
83‧‧‧ sleeve
831‧‧‧External management
832‧‧‧ catheter
833‧‧‧Outside opening
Opening in 834‧‧
90‧‧‧Female Luer Connector

Figure 1 is a perspective view of the first embodiment of the present creation. Figure 2 is an exploded view of the first embodiment of the present creation. Figure 3 is a cross-sectional view showing the first embodiment of the present creation. 4 and 5 are schematic cross-sectional views showing the state of use of the first embodiment of the present invention. 6 to 8 are schematic cross-sectional views showing the state of use of the first embodiment of the present invention with a female luer connector and a syringe. Figure 9 is a perspective view of the second embodiment of the present invention. Figure 10 is an exploded view of the second embodiment of the present creation. Figure 11 is a cross-sectional view showing a second embodiment of the present creation. Figure 12 is a perspective view of the third embodiment of the present creation. Figure 13 is an exploded view of a third embodiment of the present creation. Figure 14 is a cross-sectional view showing a third embodiment of the present creation. Figure 15 is an exploded view of the prior art. Figure 16 is a cross-sectional view of the prior art. Figure 17 is a schematic cross-sectional view showing the state of use of the prior art combined with the female luer connector.

10‧‧‧Connecting Block

11‧‧‧ casing

111‧‧‧through hole

12‧‧‧Bump

121‧‧ ‧ room

122‧‧‧Perforation

13‧‧‧ ring side wall

14‧‧‧ 容容

15‧‧‧ring hook

20‧‧‧First elastic valve

21‧‧‧ wave segment

22‧‧‧ ring segment

23‧‧‧ Straight pipe section

30‧‧‧Mobile parts

31‧‧‧Intubation

311‧‧‧ gap

32‧‧‧ take over

33‧‧‧ channel

34‧‧‧Limited tube

40‧‧‧Second elastic valve

41‧‧‧ slitting

42‧‧‧Act

50‧‧‧ sleeve

51‧‧‧External management

511‧‧‧ internal thread

512‧‧‧ buckle department

52‧‧‧ catheter

521‧‧‧Outside

Opening within 522‧‧

523‧‧‧ Ring groove

53‧‧‧Inside

Claims (9)

A male luer connector for preventing leakage of a liquid medicine, comprising a connecting seat, a first elastic valve, a moving member, a second elastic valve and a sleeve, wherein: the connecting seat is provided with a hollow protruding column a cavity is formed in the inner portion of the protruding post, and a through hole is formed in the sidewall of the protruding column, the through hole is communicated with the cavity; the first elastic valve is a compressible hollow pipe body, and one end of the first elastic valve is Nested on the outer side of the stud of the connecting seat, the perforation of the stud is closed; the moving member is a hollow body, one end of the moving member is inserted into the other end of the first elastic valve; the second elastic valve is hollow a tubular body, one end of the second elastic valve is an open end, and the other end of the second elastic valve is a closed end and is provided with a slit, the slit is in a normally closed state, and the second elastic valve is tightly sleeved on the moving part The other end; the sleeve is sleeved on the outer side of the first elastic valve, the moving member and the second elastic valve and is connected to the connecting seat. The male luer connector for preventing leakage of the liquid medicine according to claim 1, wherein: the first elastic valve is sequentially formed with a wave segment, a ring segment and a straight pipe segment, and the wave segment is sleeved on the connecting seat. The moving member has a cannula protruding at one end and a connecting tube at the other end, the inside of the cannula communicates with the inside of the connecting tube and forms a passage, and the moving member is provided with the same The cannula is inserted into the inner portion of the straight pipe section of the first elastic valve; the second elastic valve sleeve is sleeved on the outer side of the connecting piece of the moving member, so that the slit of the second elastic valve corresponds to the passage of the moving member. The male luer connector for preventing leakage of a liquid medicine according to claim 2, wherein: the sleeve has an outer tube, and a hollow duct is formed inside the outer tube, the duct has an outer opening and an inner opening, a ring groove is defined in the inner side of the conduit; a limiting tube is formed on the outer circumference of the connecting portion of the moving member, and the limiting tube is accommodated between the tube and the tube outside the sleeve; the outer side of the second elastic valve A ring body is protruded, the second elastic valve is received in the conduit of the sleeve, the ring system of the second elastic valve is received in the annular groove of the conduit, and the closed end of the second elastic valve is engaged outside the conduit In the opening, the outer opening is closed. The male luer connector for preventing leakage of a liquid medicine according to claim 1, wherein one end of the connecting seat protrudes from a hollow sleeve, and the other end protrudes from the protruding post, and a through hole is formed in the sleeve. One end of the cavity of the stud is an open end and communicates with the through hole, and a ring side wall is formed around the outer periphery of the stud, and a groove is formed between the side wall of the ring and the stud, the first elastic valve system Set in the pocket. The male luer connector for preventing leakage of the liquid medicine according to claim 2, wherein one end of the connecting seat protrudes from a hollow sleeve, and the other end protrudes from the protruding post, and a through hole is formed in the sleeve. One end of the cavity of the stud is an open end and communicates with the through hole, and a ring side wall is formed around the outer periphery of the stud, and a groove is formed between the side wall of the ring and the stud, the first elastic valve system Set in the pocket. The male luer connector for preventing leakage of the liquid medicine according to claim 3, wherein one end of the connecting seat protrudes from a hollow sleeve, and the other end protrudes from the protruding post, and a through hole is formed in the sleeve. One end of the cavity of the stud is an open end and communicates with the through hole, and a ring side wall is formed around the outer periphery of the stud, and a groove is formed between the side wall of the ring and the stud, the first elastic valve system Set in the pocket. The male luer connector for preventing leakage of the liquid medicine according to claim 6, wherein: the outer periphery of the ring side wall of the connecting seat is formed with a ring groove, and a ring hook portion is protruded from the groove wall of the ring groove; The outer tube of the sleeve is formed with a looping portion, and the sleeve is fastened to the loop hook portion of the ring groove of the connecting seat by the loop portion. The male luer connector for preventing leakage of the liquid medicine according to claim 6, wherein: the outer side surface of the ring side wall of the connecting seat is recessed with an annular outer ring groove, and the inner side surface of the ring side wall is concavely disposed. An annular inner ring groove; an annular outer ring protrusion protrudes from an inner side surface of the outer tube of the sleeve, and an inner tube is formed inside the outer tube of the sleeve, and the outer side surface of the inner tube protrudes The inner ring has a ring-shaped inner ring protrusion, and the outer ring protrusion and the inner ring protrusion are respectively sleeved to the outer ring groove and the inner ring groove. The male luer connector for preventing leakage of the liquid medicine according to claim 6, wherein: the outer side surface of the ring side wall of the connecting seat is recessed with two axial grooves; the inner side of the outer tube of the sleeve protrudes There are six axial projections, wherein the sleeve utilizes two axial grooves in which the two axial projections are correspondingly buckled to the connecting seat.