TWI606852B - Needle free medical connector - Google Patents

Description

Needle-free medical connector

The present invention relates to a needle-free medical connector, and more particularly to a needle-free medical connector that is easily deformed by bending.

In order to prevent the patient from repeatedly suffering from the pain of the needle piercing the skin during the injection, and at the same time, it is convenient for the medical staff to add the medicine to the patient more easily and efficiently, so the general drip device will be on the pipeline or the upper cover of the measuring cylinder. With the needle-free medical connector, the patient only needs to receive a single application, and the medical staff can add medicine to the patient through the needle-free medical connector, avoiding the trouble of repeated application and reducing the pain of the patient. Very convenient and ideal.

A conventional needle-free medical connector includes a cover, a joint, and an elastomer. The cover body forms a chamber and an upper opening. The joint is detachably disposed at the bottom of the cover and has a first-class track. The elastomer is disposed in the chamber and has a bottom end that abuts the joint. When the syringe containing the liquid medicine is inserted into the upper opening of the cover body, the syringe has one needle holder at one end thereof, and the needle holder presses the top of the elastic body to bend the elastic body, and is located in the syringe at this time. The liquid medicine is passed through the chamber of the cover body and then flows into the flow path of the joint to be drained into the patient.

However, the overall thickness of the elastomer of the conventional needle-free medical connector is too thick to be easily deformed by bending. The user has to apply a large amount of force to completely deform the elastomer, which is very laborious.

Moreover, the bottom of the elastomer of the conventional needle-free medical connector is not fixed, so the elastic body will be disengaged from the joint.

In view of this, how to provide a needle-free medical connector whose elastic body is easily bent and deformed without being detached from the joint is a problem to be overcome by those skilled in the art.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a needle-free medical connector in which the elastomer is easily bent and deformed without detaching from the joint.

In order to achieve the foregoing objects, the present invention provides a needle-free medical connector including a cover, a joint, and an elastomer.

The cover body surrounds a chamber and has a first end and a second end. The first end forms a socket, and the second end forms a connection port.

The joint includes a joint portion and a plug portion. The joint portion is connected to the joint port of the cover body. The plug portion forms a plug groove, and the joint portion forms a first-class passage, and the flow passage communicates with the chamber.

The elastic body comprises a head, a shoulder, a body and a base, the head is located at the first end of the cover, and a recess is formed in the interior thereof, the shoulder is from the outside of the head The wall extends laterally, and the outer side wall of the shoulder abuts against the inner side wall of the cover body, and the top end of the shoulder portion forms an annular recess. The body portion is disposed in the cavity and surrounds a hollow space, and the hollow space is connected. In the recess, the base is disposed at a bottom end of the body and abuts against a combined portion of the joint.

According to a preferred embodiment, the cover body includes a plurality of pressing blocks protruding from the side wall of the housing of the cover body, and a bottom end of each of the pressing blocks protrudes downwardly from a convex portion, and the base extends laterally. The top of the ring protrusion forms a ring groove, and the convex portion of the pressure block is disposed in the ring groove.

According to a preferred embodiment, the top end of the joint portion of the joint forms a ring groove, and the bottom of the base of the elastic body protrudes downwardly from a protrusion, and the protrusion is disposed in the ring groove.

The effect of the present invention is that when the body of the elastic body is squeezed, it can be easily bent and deformed from the folded edge. Furthermore, the base of the elastomer is pressed by the compact of the cover and the bump at the bottom is solid The ring groove of the joint portion of the joint has a good fixing effect and does not deviate from the joint portion of the joint.

1‧‧‧Syringe

2‧‧‧ piston rod

10‧‧‧ cover

11‧‧ ‧ room

13‧‧‧ first end

131‧‧‧ jack

15‧‧‧second end

151‧‧‧Connecting port

17‧‧‧Clamps

171‧‧‧Drainage space

173‧‧‧ convex

20, 20’, 20” ‧ ‧ joints

21, 21" ‧ ‧ combination department

211‧‧‧ Ring groove

213‧‧‧ Airway

215‧‧‧ Groove

217‧‧‧Bump

2171‧‧ ‧ gap

23‧‧‧ Sockets

231, 231"‧‧‧ Socket slots

25‧‧‧ catheter

27, 27" ‧ ‧ flow path

271, 271', 271" ‧ ‧ first channel

271”‧‧1 vertical channel

271”‧‧‧2 horizontal channels

273, 273" ‧ ‧ second channel

30, 30’, 30”‧‧‧ Elastomers

31, 31" ‧ ‧ head

311, 311"‧‧‧ recessed holes

33, 33', 33'''‧‧‧ shoulders

331‧‧ ‧ class

333‧‧‧

335‧‧‧ fillet

35, 35’, 35”, 35'''‧‧‧ Body

351‧‧‧ hollow space

352, 352', 352'''‧‧‧ concave curved surface

353, 353'''‧‧‧ smooth surface

354, 354', 354'''‧‧‧ hem

357', 357'''‧‧‧ convex curved surface

37‧‧‧Base

371‧‧‧ ring convex

3711‧‧‧Circle

373‧‧‧Bumps

39‧‧‧ annular gap

L1~L4‧‧‧ axis

1 is a perspective view of a first embodiment of a needle-free medical connector of the present invention.

2 is an exploded view of the first embodiment of the needle-free medical connector of the present invention.

2A is a perspective view of the elastomer of the first embodiment of the needle-free medical connector of the present invention.

Figure 3 is a cross-sectional view taken along line III-III of Figure 1.

Figure 4 is a cross-sectional view taken along line IV-IV of Figure 1.

Fig. 5 is a schematic view showing the elastic body of the first embodiment of the needle-free medical connector of the present invention pressed against deformation by a syringe.

Figure 6 is a cross-sectional view showing a second embodiment of the needle-free medical connector of the present invention.

Fig. 7 is a schematic view showing the elastic body of the second embodiment of the needle-free medical connector of the present invention pressed against deformation by a syringe.

Figure 8 is a perspective view of the high flow joint of the third embodiment of the needleless medical connector of the present invention.

Figure 9 is a schematic view showing the elastic body of the third embodiment of the needle-free medical connector of the present invention pressed against deformation by a syringe.

Figure 10 is a perspective view of an elastomer of a fourth embodiment of the needle-free medical connector of the present invention.

Figure 11 is a cross-sectional view showing an elastic body of a fourth embodiment of the needle-free medical connector of the present invention.

Figure 12 is a cross-sectional view showing the elastic body of the fifth embodiment of the needle-free medical connector of the present invention.

Figure 13 is a perspective view of an elastic body of a sixth embodiment of the needle-free medical connector of the present invention.

Figure 14 is a cross-sectional view showing an elastic body of a sixth embodiment of the needle-free medical connector of the present invention.

Figure 15 is a cross-sectional view showing a seventh embodiment of the needle-free medical connector of the present invention.

Figure 16 is a cross-sectional view showing an eighth embodiment of the needle-free medical connector of the present invention.

Figure 17 is a cross-sectional view showing a ninth embodiment of the needle-free medical connector of the present invention.

Figure 18 is a cross-sectional view showing a tenth embodiment of the needle-free medical connector of the present invention.

Figure 19 is a cross-sectional view showing an eleventh embodiment of the needle-free medical connector of the present invention.

Figure 20 is a cross-sectional view showing a twelfth embodiment of the needle-free medical connector of the present invention.

Figure 21 is a cross-sectional view showing a thirteenth embodiment of the needle-free medical connector of the present invention.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

1 to FIG. 4, FIG. 1 is a perspective view of a first embodiment of a needle-free medical connector of the present invention; FIG. 2 is an exploded view of the first embodiment of the needle-free medical connector of the present invention; 3 is a perspective view of the elastic body of the first embodiment of the needle-free medical connector of the present invention; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1; and FIG. 4 is taken along line IV-IV of FIG. Intercepted section view. The present invention provides a needle-free medical connector comprising a cover 10, a joint 20 and an elastomer 30.

The cover 10 encloses a chamber 11 and has a first end 13 and a second end 15. The inside of the first end 13 defines an insertion hole 131, and the outer side wall of the first end 13 forms an external thread. The second end 15 forms a connection port 151. The chamber 11 is interposed between the insertion hole 131 and the connection port 151. The cover body 10 includes a plurality of pressure blocks 17 protruding from the side walls of the chamber 11 of the cover body 10 and arranged equidistantly. Thereby, a drainage space 171 is formed between each of the two pressure blocks 17, and the drainage spaces 17 communicate with the chamber 11. Each of the pressure blocks 17 has a wedge shape, and one end is flat and the other end is flat, as shown in FIGS. 3 and 4. More specifically, each of the pressing blocks 17 has a pointed end and a top end thereof, and each of the pressing blocks 17 has a flat end and a bottom end thereof. A front end edge of each of the pressure blocks 17 protrudes downward from a convex portion 173.

The joint 20 includes a combined portion 21, a plug portion 23 and a conduit 25. The combination portion 21 is connected to the connection port 151 of the second end 15 of the cover 10. Wherein the top end of the combination portion 21 forms a ring Slot 211. The plug portion 23 forms a plug slot 231. In this embodiment, the inner wall surface ring of the insertion groove 231 is provided with an internal thread. The combination portion 21 defines an air passage 213 that penetrates the top and bottom ends of the combination portion 21 and communicates with the insertion slot 231 . Thereby, the joint 20 is a positive pressure joint. The duct 25 extends downward from the bottom end of the assembly portion 21 through the insertion slot 231. The joint 20 forms a flow path 27 including a first passage 271 and a second passage 273. The first passage 271 extends transversely through the two sides of the combination portion 21. The second passage 273 extends longitudinally through the conduit 25 and communicates with the first passage 271.

The material of the elastic body 30 may be silicone rubber, or may be other materials that are elastic and have the ability to be deformed and restored to their original shape. The elastic body 30 includes a head 31, a shoulder portion 33, a body portion 35 and a base 37. The head 31 is located in the insertion hole 131 of the first end 13 of the cover 10, and a recessed hole 311 is formed in the inside. The thickness of the wall surface of the portion of the head portion 31 surrounding the recessed hole 311 is uniform, that is, the wall surface of the portion of the head portion 31 surrounding the recessed hole 311 is not thicker and thinner. Preferably, the head portion 31 has a cylindrical shape, and the recessed hole 311 is a circular hole. Therefore, the wall surface of the portion of the head portion 31 surrounding the recessed hole 311 is a ring wall having a uniform thickness, that is, The inner and outer wall surfaces of the annular wall have a common center. The shoulder 33 extends laterally from the outer side wall of the head 31. The outer side wall of the shoulder 33 forms a level 331 which abuts against the inner side wall of the cover 10. Thereby, the jack 131 and the chamber 11 are not in communication with each other. The top end of the shoulder portion 33 defines an annular recess 333 which is located adjacent the junction of the shoulder portion 33 and the head portion 31. A fillet 335 is formed at the junction of the class 331 and the top end of the shoulder 33. The body portion 35 is disposed in the chamber 10 and surrounds a hollow space 351. The hollow space 351 communicates with the recessed hole 311 and the air passage 213. The outer side wall of the body portion 35 forms a concave curved surface 352 near the bottom end of the body portion 35. The outer side wall of the body portion 35 forms a smooth curved surface 353 near the shoulder portion 33. The smooth curved surface 353 is connected thereto. The outer side wall of the shoulder portion 33 and the concave curved surface 352 of the outer side wall of the body portion 35. The inner side wall of the body portion 35 corresponds to a smooth curved surface 353 and a concave curved surface 352 of the outer side wall of the body portion 35 as a smooth curved surface. The concave arc of the outer side wall of the body 35 The thickness of the face 352 and the minimum spacing of the inner side walls of the body 35 is less than the thickness of the remainder of the body 35 to form a flange 354, that is, the flange 354 is the thinnest portion of the body. The thickness of the flange 354 is between one-half and one-fifth of the thickness of the thickest portion of the body portion 35. Wherein the distance between the flange 354 and the top end of the body portion 35 is between one-half and four-fifth of the distance between the top and bottom ends of the body portion 35 (that is, the total length of the body portion 35). . Preferably, the distance between the flange 354 and the top end of the body portion 35 is seven tenths of the distance between the top and bottom ends of the body portion 35. The base 37 is disposed at a bottom end of the body portion 35 and extends laterally to form a ring protrusion 371. The ring protrusion 371 and the inner side wall of the cover body 10 are maintained at an appropriate distance to form an annular gap 39. The annular gap is formed. 39 is connected between the drainage space 171 and the first passage 271 of the flow passage 27. A ring groove 3711 is formed at the top of the ring protrusion 371, and the convex portion 173 of the pressure block 17 is disposed in the ring groove 3711. A protrusion 373 (shown in FIG. 2A ) protrudes from the bottom of the base 37 , and the protrusion 373 is disposed on the ring groove 211 .

The mode of use of the present invention will be described below in conjunction with the drawings. Please refer to FIG. 5 , which is a schematic view showing the elastic body of the first embodiment of the needle-free medical connector of the present invention pressed against deformation by a syringe. First, a pipe (not shown) is screwed into the insertion groove 231, and the pipe 25 is inserted into the pipe. The syringe 1 filled with the drug solution is inserted into the insertion hole 131, and the syringe 1 is pressed against the head 31 of the elastic body 30 to deform the head 31 of the elastic body 30 until the head 31 of the elastic body 30 is deformed. To the limit. Next, the syringe 1 is continuously pressed against the head portion 31 of the elastic body 30, so that the body portion 35 of the elastic body 30 starts to be deformed by the pressing of the head portion 31 of the elastic body 30. The body portion 35 of the elastic body 30 is bent inward from one side of the flange 354, and the other side is bent outward. Thereby, the level 331 of the shoulder portion 33 of the elastic body 30 is away from the inner side wall of the cover body 10, so that the insertion hole 131 communicates with the chamber 11. After the syringe 1 passes through the insertion hole 131, it enters the chamber 11. A piston rod 2 is pushed to inject the liquid medicine inside the syringe 1 into the chamber 11. The chemical solution flows through the drainage space 171, the annular slit 39, and the first and second passages 271 and 272 of the flow passage 27, and then enters the conduit. What is important is that during the deformation of the elastic body 30, the concave hole 311 of the head 31 and the air in the hollow space 351 of the body portion 35 are squeezed. The air passage 213 flows from the insertion groove 231. After the syringe 1 is removed from the insertion hole 131, the elastic body 30 is restored to its original shape by its own elastic force, so that the chamber 11 and the insertion hole 131 are restored to be in a mutually disconnected state, as shown in FIG. 3 and FIG. 4 is shown.

Please refer to FIG. 6 and FIG. 7. FIG. 6 is a cross-sectional view showing a second embodiment of the needle-free medical connector of the present invention; FIG. 7 is a second embodiment of the needle-free medical connector of the present invention. Schematic diagram of the deformation. The second embodiment of the present invention is substantially the same as the structure of the first embodiment, with the difference that the structure of the joint 20' is slightly different. More specifically, the first passage 271' penetrates the one side of the combined portion 21 to communicate with the annular slit 39. Thereby, the joint 20' becomes another type of positive pressure joint.

Please refer to FIG. 8 , which is a perspective view of a high flow joint of a third embodiment of the needle-free medical connector of the present invention. The third embodiment of the present invention is substantially the same as the first embodiment except that the joint 20" is a high flow negative pressure joint. More specifically, the combined portion 21" does not have the annular groove 211 and the The air passage 213 is formed with a recess 215, and the bottom of the recess 215 protrudes upward from the plurality of studs 217. The second passage 273" extends longitudinally through the bottom of the recess 215 and communicates with the insertion slot 231". The protrusions 217 surround the opening of the second channel 273" on the bottom side of the groove 215, and a notch 2171 is formed between each of the two protrusions 217. The first channel 271" includes a plurality of longitudinal channels 271"1 And multiple horizontal channels 271"2. The longitudinal channels 271"1 are formed on the inner side wall of the recess 215. The lateral channels 271"2 are formed at the bottom of the recess 215, and one end thereof communicates with one of the longitudinal channels 271"1, and the other end extends to The bottom of one of the notches 2171 is in communication with the second channel 271"2. When the piston rod 2 is pushed to inject the liquid medicine inside the syringe 1 into the chamber 11, the liquid medicine flows through the chamber 11, the drainage space 171, the annular gap 39, and the flow path 27" first. After the longitudinal channel 271"1 and the lateral channel 271"2, the groove 215, the notch 2171 and the second channel 273" of the channel 271", the pipe (not shown) is entered, as shown in Fig. 9. It is important that The hollow space 351 of the body 35 communicates with the recess 215 and the second passage 273" of the flow passage 27". Thereby, the elastic body 30 is During the deformation, the concave hole 311 of the head 31 and the air in the hollow space 351 of the body portion 35 are squeezed to enter the insertion through the groove 215 and the second passage 273" of the flow passage 27" Slot 231".

Please refer to FIG. 10 and FIG. 11. FIG. 10 is a perspective view of an elastic body of a fourth embodiment of the needle-free medical connector of the present invention; FIG. 11 is an elastic body of a fourth embodiment of the needle-free medical connector of the present invention. Sectional view. The fourth embodiment of the present invention is substantially the same as the structure of the first embodiment except that the structure of the elastic body 30' is slightly different. More specifically, the outer side wall of the body 35' of the elastic body 30' forms a convex curved surface 357' near the shoulder portion 33', and the convex curved surface 357' is connected to the outer side wall of the shoulder portion 33'. Between the concave curved surfaces 352' of the outer side wall of the body 35'. Thereby, the outer side wall of the body portion 35' of the elastic body 30' is S-shaped. A portion of the inner side wall of the body portion 35' corresponding to the convex curved surface 357' of the outer side wall of the body portion 35' and a concave curved surface 352' of the outer side wall of the body portion 35' is a concave curved surface, the body portion 35 The inner side wall of the 'inwardly protrudes slightly inwardly from the bottom end of the body portion 35' and is convexly curved. The flange 354' is located at the junction of the convex curved surface 357' of the outer side wall of the body portion 35' and the concave curved surface 352' of the outer side wall of the body portion 35'. In the present embodiment, the distance between the flange 354' and the tip end of the body portion 35' is seven tenths of the distance between the top and bottom ends of the body portion 35'. The thickness of the convex curved surface 357' of the outer side wall of the body portion 35' and the inner side wall of the body portion 35' is equal to the concave curved surface 352' of the outer side wall of the body portion 35' and the body portion 35. 'The thickness of the maximum spacing of the inner sidewalls. Preferably, the thickness of the flange 354' is one third of the thickness of the thickest portion of the body 35', that is, the thickness of the flange 354' is sufficiently thicker than the thickness of the body. The thickness is two-thirds less.

12 is a cross-sectional view showing an elastic body of a fifth embodiment of the needle-free medical connector of the present invention. The fifth embodiment of the present invention is substantially the same as the first embodiment except that the structure of the elastic body 30" is slightly different. More specifically, the outer side wall of the body 35" of the elastic body 30" is not With the concave curved surface, the axis L1 of the concave hole 311" of the head 31" of the elastic body 30" and the axis L2 of the head 31" of the elastic body 30" are parallel to each other but do not overlap each other, the elastic body 30" The axis L3 of the hollow space 351" of the body 35" and the axis L4 of the body 35" of the elastic body 30" are parallel to each other but Do not overlap. In other words, the axis L1 is maintained at a distance from the axis L2 which is at a distance from the axis L4. Thereby, the thickness of the wall surface of the head portion 31" of the elastic body 30" forming the recessed hole 311" is gradually reduced from one side to the other side, and the thickness of the body portion 35" of the elastic body 30" is from the side thereof The other side is gradually smaller. Preferably, the axis L3 of the hollow space 351" of the body 35" of the elastic body 30" overlaps with the axis L1 of the recessed hole 311", and the body 35" of the elastic body 30" The axis L4 overlaps with the axis L2 of the head 31" of the elastic body 30". Thereby, the head 31" of the elastic body 30" forms a direction in which the thickness of the wall surface of the recessed hole 311" is gradually smaller and the elastic body 30" The thickness of the body 35" is gradually smaller in the same direction. In other embodiments, the direction in which the thickness of the wall surface of the head portion 31" of the elastic body 30" is formed into the recessed hole 311" is smaller than the direction in which the thickness of the body portion 35" of the elastic body 30" is gradually smaller, and there is no No.

13 and FIG. 14, FIG. 13 is a perspective view of an elastic body of a sixth embodiment of the needle-free medical connector of the present invention; FIG. 14 is an elastic body of a sixth embodiment of the needle-free medical connector of the present invention. Sectional view. The sixth embodiment of the present invention is substantially the same as the fourth embodiment except that the structure of the elastic body 30"' is slightly different. More specifically, the outer side wall of the body 35 ′′′ of the elastic body 30 ′′′ forms a convex curved surface 357 ′′′ and a smooth curved surface 35 ′′′ near the shoulder 33 ′′′. A convex curved surface 357"" is coupled between the outer side wall of the shoulder 33"" and the concave curved surface 352"" of the outer side wall of the body 35"". Thereby, half of the outer side wall of the body 35"' of the elastic body 30"" is S-shaped and the other half is circular. The inner side wall of the body 35"' corresponds to the convex curved surface 357"' of the outer side wall of the body 35"' and the portion of the concave curved surface 352'" of the outer side wall of the body 35"" For a concave curved surface, the inner side wall of the body 35"" protrudes slightly inwardly from the bottom end of the body 35"" and is convexly curved. Wherein the flange 354"" is located at the junction of the convex curved surface 357"' of the outer side wall of the body 35"' with the concave curved surface 352"' of the outer side wall of the body 35"". Wherein the thickness of the convex curved surface 357 ′′′ of the outer side wall of the body 35 ′′′ and the inner side wall of the body 35 ′′′ is equal to the concave arc of the outer side wall of the body 35 ′′′ The thickness of the curved surface 352"" and the maximum spacing of the inner side walls of the body 35'.

15 is a cross-sectional view showing a seventh embodiment of the needle-free medical connector of the present invention. The seventh embodiment of the present invention is substantially the same as the first embodiment except that the bottom of the base 37 is a flat surface and therefore does not have the bump 373. At the same time, the top end of the combined portion forms a flat surface, so the annular groove 211 is not provided.

Please refer to FIG. 16, which is a cross-sectional view showing an eighth embodiment of the needle-free medical connector of the present invention. The eighth embodiment of the present invention is substantially the same as the second embodiment except that the structure of the cover 10, the joint 20 and the elastic body 30 are slightly different. More specifically, the inner side wall of the cover body 10 does not have the same pressure block 17, the ring groove 211 of the top end of the joint portion 21 of the joint 20 has a relatively deep depth, and the base 37 of the elastic body 30 does not extend laterally. The ring protrusion 371, but extending downward, and the entire ring groove 211 inserted into the top end of the combination portion 21 is assembled, so that the bottom portion of the base 37 of the elastic body 30 does not have or need to be the protrusion 373.

17 is a cross-sectional view showing a ninth embodiment of the needle-free medical connector of the present invention. The ninth embodiment of the present invention is substantially the same as the fourth embodiment except that the structure of the cover, the joint, and the elastic body 30' is slightly different. More specifically, the structure of the cover and the joint is the same as that of the cover and the joint of the eighth embodiment, and thus is not shown. The base 37' of the elastic body 30' does not extend laterally to form the annular projection 371, but extends downward, and the entire annular groove 211 inserted into the top end of the combined portion 21 is assembled, so that the base 37 of the elastic body 30' The bottom of the ' does not have or need to be the bump 373.

18 is a cross-sectional view showing a tenth embodiment of the needle-free medical connector of the present invention. The tenth embodiment of the present invention is substantially the same as the fifth embodiment except that the structure of the cover, the joint and the elastic body 30" is slightly different. More specifically, the cover body and the structure of the joint The cover body and the joint of the eighth embodiment are the same, and thus the figure is not shown. The base 37" of the elastic body 30" does not extend laterally to form the ring protrusion 371, but extends downward, and is entirely inserted into the combination portion 21. The top ring groove 211 is assembled, so that the bottom of the base 37" of the elastic body 30" does not have or need to be the bump 373.

19 is a cross-sectional view showing an eleventh embodiment of the needle-free medical connector of the present invention. The eleventh embodiment of the present invention is substantially the same as the sixth embodiment except that the structure of the cover, the joint, and the elastic body 30"" are slightly different. More specifically, the structure of the cover and the joint is the same as that of the cover and the joint of the eighth embodiment, and thus is not shown. The base 37 ′′′ of the elastic body 30 ′′′ is not laterally extended to form the annular protrusion 371 , but extends downward, and the entire annular groove 211 inserted into the top end of the combined portion 21 is assembled to complete the assembly, and thus the elastic body 30 The bottom of the ''' base 37''' does not have or need to be the bump 373.

20 is a cross-sectional view showing a twelfth embodiment of the needle-free medical connector of the present invention. The twelfth embodiment of the present invention is substantially the same as the fourth embodiment except that the distance between the folded edge 354' and the top end of the body portion 35' is the distance between the top and bottom ends of the body portion 35'. One of the points.

21 is a cross-sectional view showing a thirteenth embodiment of the needle-free medical connector of the present invention. The thirteenth embodiment of the present invention is substantially the same as the structure of the twelfth embodiment, except that the structure of the cover, the joint, and the elastic body 30' is slightly different. More specifically, the structure of the cover and the joint is the same as that of the cover and the joint of the eighth embodiment, and thus is not shown. The base 37' of the elastic body 30' does not extend laterally to form the annular projection 371, but extends downward, and the entire annular groove 211 inserted into the top end of the combined portion 21 is assembled, so that the base 37 of the elastic body 30' The bottom of the ' does not have or need to be the bump 373.

The achievable effects of the present invention are as follows:

1. The annular recess 333 at the top end of the shoulders 33, 33' of the elastomer 30, 30' enables the head 31 of the elastomer 30, 30' to be easily bent and deformed. In particular, when the annular recess 333 is located close to the joint of the shoulder portion 33, 33' and the head portion 31, the head portion 31 of the elastic body 30, 30' is more easily deformed by bending.

2. The flanges 354, 354' are the thinnest portions of the body portions 35, 35' of the elastomers 30, 30'. Thereby, when the body portions 35, 35' of the elastic bodies 30, 30' are pressed, they can be easily bent and deformed from the folded edges 354, 354'. In particular, the thickness of the flange 354, 354' is between one-half and one-fifth of the thickness of the thickest portion of the body 35, 35' and the flange 354, 354' and the body When the distance between the tips of the portions 35, 35' is between one-half and four-fifth of the distance between the top and bottom ends of the body portions 35, 35', the body 35 of the elastic body 30, 30', 35' can be more easily deformed from the flanges 354, 354'. When the thickness of the folded edge 354, 354' is one third of the thickness of the thickest portion of the body portion 35, 35' and the distance between the folded edge 354, 354' and the top end of the body portion 35, 35' is When the distance between the top and bottom ends of the body portions 35, 35' is seven tenths, the body portions 35, 35' of the elastic body 30, 30' are more easily bent and deformed from the folded edges 354, 354'.

3. The thickness of the wall surface of the portion of the head portion 31 of the elastic body 30 that surrounds the recessed hole 311 is uniform. Thereby, the head 31 of the elastic body 30 can be easily bent and deformed.

4. The level 331 of the shoulders 33, 33' of the elastomer 30, 30' abuts against the inner side wall of the cover 10. Thereby, the elastic body 30, 30' completely closes the opening between the insertion hole 131 and the chamber 11, thereby achieving the effect of two-way waterproofing.

5. The base 37 of the elastomer 30, 30' is firmly pressed by the pressing block 17 of the cover 10, and the bump 373 at the bottom thereof is tightly fixed to the combined portion 21 of the joint 20, 20'. The ring groove 211 has a good fixing effect, so that the elastic bodies 30, 30' do not come off the joint portion 21 of the joints 20, 20'.

6. When the joints 20, 20' are positive pressure joints and the piston rod 2 in the syringe 1 is pulled, the pressure of the chamber 11 and the flow passage 27 does not change. Thereby, the liquid remaining in the cover body 10, the joints 20, 20' and the elastic body 30, 30' continues to flow into the pipeline connecting the joints 20, 20', and further from the pipeline It flows into the blood vessel of the patient and does not flow back into the syringe 1. Furthermore, since the hollow space 351 of the body 35, 35' of the elastic body 30, 30' is not in communication with the chamber 11 and the flow path 27, the elastic body 30, 30' does not have any dead space ( Dead space, dead Space), after the addition, the outer side walls of the elastomer 30, 30' are more easily rinsed by the rinsing liquid (e.g., saline). Further, the present invention can perform the blood drawing action by the characteristics of the technical features without causing hemolysis (hemolysis).

7. When the joint 20" is a high flow negative pressure joint and the piston rod 2 in the syringe 1 is pulled, the chamber 11 and the flow passage 27" during the recovery of the shape of the elastic body 30, 30' The pressure will be affected and varied, causing the liquid to flow back into the hollow space 351 of the body 35, 35' of the elastomer 30, 30'. Therefore, after the addition, the amount of the rinsing liquid (e.g., saline) must be used more than the positive pressure joint to completely clean the elastomer 30, 30'. Furthermore, the joint 20" is not suitable for blood drawing. However, the joint 20" has an advantage in that the flow rate of the liquid to be supplied is large.

8. The fifth embodiment and the tenth embodiment of the present invention are because the wall surface of the head portion 31" of the elastic body 30" is formed with the recessed hole 311" and the thickness of the body portion 35" of the elastic body 30" are all in the same direction. The thickness of the elastic body 30" and the body portion 35" are easily bent and deformed from the thinner side.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

10‧‧‧ cover

11‧‧ ‧ room

13‧‧‧ first end

131‧‧‧ jack

15‧‧‧second end

151‧‧‧Connecting port

17‧‧‧Clamps

171‧‧‧Drainage space

173‧‧‧ convex

21‧‧‧Combination Department

211‧‧‧ Ring groove

213‧‧‧ Airway

23‧‧‧ Sockets

231‧‧‧ Socket slot

25‧‧‧ catheter

27‧‧‧ flow path

271‧‧‧First Passage

273‧‧‧second channel

31‧‧‧ head

311‧‧‧ recessed hole

33‧‧‧ shoulder

331‧‧ ‧ class

333‧‧‧

335‧‧‧ fillet

35‧‧‧ Body

351‧‧‧ hollow space

352‧‧‧ concave curved surface

353‧‧‧Smooth surface

354‧‧‧Folding

37‧‧‧Base

371‧‧‧ ring convex

3711‧‧‧Circle

373‧‧‧Bumps

39‧‧‧ annular gap

Claims (9)

A needle-free medical connector includes: a cover body surrounding a chamber and having a first end and a second end, the first end forming a socket, the second end forming a connection port, the cover body The utility model comprises a plurality of pressure blocks protruding from the side walls of the chamber of the cover body and arranged equidistantly, and a drainage space is formed between each two pressure blocks, the drainage spaces are connected to the chamber, and the pressure blocks are a wedge shape, one end of which is flat and the other end is flat and thick, and each of the pressing blocks has a pointed end with its top end, and each of the pressing blocks has a flat end with its bottom end, and the bottom end of each pressing piece protrudes downward with a convex portion; A joint includes a joint portion, a plug portion and a conduit, the joint portion being connected to the joint of the cover body, the plug portion forming a plug groove extending downward from the bottom end of the assembly portion Passing through the insertion slot, the joint forms a first-class passage, the flow passage includes a first passage and a second passage, the first passage transversely penetrates two sides of the combined portion, the second passage longitudinally runs through the conduit and The first passage is in communication; and an elastic body includes a head, a shoulder, a body and a body a socket having a recess at a first end of the cover and a recess formed therein, the shoulder extending laterally from the outer sidewall of the head, and the outer sidewall of the shoulder abutting the cover The inner side wall of the body, and the top end of the shoulder portion forms a ring recess, the body is disposed in the cavity and encloses a hollow space, the hollow space is connected to the recessed hole, and the base is disposed at the bottom end of the body and Abutting against the joint portion of the joint, the base extends laterally with a ring protrusion, and an outer distance between the outer side wall of the ring protrusion and the inner side wall of the cover body forms an annular gap, and the annular gap communicates with the drainage Between the space and the first channel, the top of the ring protrusion forms a ring groove, and the convex portion of the pressure block Provided in the annular groove, the top end of the joint portion of the joint abuts against the bottom of the base of the elastic body, and the top end of the joint portion of the joint protrudes from the bottom of the base of the elastic body by a bump, and the other A ring groove is formed, and the protrusion is disposed in the ring groove. The needle-free medical connector of claim 1, wherein the outer side wall of the body forms a concave curved surface near the bottom end of the body, the concave curved surface and the inner side wall of the body being the smallest The thickness of the spacer is less than the thickness of the remainder of the body to form a hem. The needle-free medical connector of claim 2, wherein the outer side wall of the body forms a convex curved surface near the shoulder, the convex curved surface is connected to the outer side wall of the shoulder and the concave arc Between the curved surfaces, the inner side wall of the body corresponds to the convex curved surface of the outer side wall of the body and the concave curved surface of the outer side wall of the body is a concave curved surface. The needle-free medical connector of claim 3, wherein the flange is located at a junction of a convex curved surface of the outer side wall of the body and a concave curved surface of the outer side wall of the body, the body The thickness of the convex arc curved surface of the outer side wall and the maximum spacing of the inner side walls of the body is equal to the thickness of the concave arc curved surface of the outer side wall of the body and the maximum spacing of the inner side walls of the body. The needle-free medical connector of claim 2, wherein the outer side wall of the body forms a smooth curved surface near the shoulder, the smooth curved surface is connected to the outer side wall of the shoulder and the concave curved surface The inner side wall of the body is a smooth curved surface corresponding to the smooth curved surface and the concave curved surface of the outer side wall of the body. The needle-free medical connector of claim 2, wherein the outer side wall of the body forms a convex curved surface and a smooth curved surface near the shoulder, the convex arc The curved surface is connected between the outer side wall of the shoulder and the concave curved surface, and the inner side wall of the body corresponds to a convex curved surface of the outer side wall of the body and a concave curved surface portion of the outer side wall of the body is a concave surface The curved surface, the inner side wall of the body corresponds to a smooth curved surface of the outer side wall of the body. The needle-free medical connector of claim 1, wherein the annular recess is located adjacent the junction of the shoulder and the head. The needle-free medical connector of claim 1, wherein the outer side wall of the shoulder of the elastomer forms a class that abuts against the inner side wall of the cover. The needle-free medical connector of claim 1, wherein an axis of the hollow space of the body of the elastic body and an axis of the body of the elastic body are parallel to each other but do not overlap, the axis of the concave hole and the axis The axes of the heads of the elastomers are parallel to each other but do not overlap.