CN202336113U - Needle-free connector module - Google Patents

Abstract

A needle-free connector module comprises a needle-free nut, an elastic valve, an elastic bracket assembled on the elastic valve and a dosing cap; wherein, the medicine adding cap is provided with a hollow cavity, the medicine adding cap is mutually connected with the needle-free screw cap, and the elastic valve and the elastic bracket are accommodated in the hollow cavity; the elastic valve is provided with an upper valve body and a hollow lower valve body, and the upper valve body is provided with a longitudinal slit; the elastic support is provided with a support body and a plurality of elastic support ribs. The utility model discloses a exempt from needle connector module when the elasticity valve does not receive external force and maintains when predetermineeing the shape, goes up the slit of valve body and is airtight confined state, can effectively block the entering of outside air or medicament, and the elasticity valves is equipped with elastic support, can effectively control the deformation and the answer location of elasticity valve.

Description

Pinless Connector Module

technical field

The utility model relates to a needle-free connector module, in particular to a needle-free connector module used in medical tools, blood transfusion or transfusion.

Background technique

Existing syringes and syringes are common medicament administration devices. However, syringes and syringes are dangerous, so they need to be recycled, resulting in increased medical costs. In addition, because the needle is a sharp structure, when the medical personnel use the existing needle syringe, they may accidentally be stabbed by the needle, and if the needle is not clean, it will cause infection. The dosing tube that can be filled with medicine can avoid the chance of medical staff being infected and increase the safety of use, and the used needle must be discarded, which increases the cost burden. Later, a needle-free injection connector and a needle-free syringe were developed to administer medicine. This kind of device has low risk, can be reused, and can avoid the high cost caused by mass recycling. However, there are a lot of gaps inside the existing needle injection connector, and the airtight effect is not good, resulting in a large amount of air or medicine remaining in it, and medicine and blood are not properly flowed back and remain in the other inside, when the next injection When injecting medicine, air or residual medicine will be pumped into the patient's body in a positive pressure manner, resulting in improper expansion of blood vessels and causing pain to the patient. When the injection is completed and the syringe is withdrawn, the blood and medicine will also flow back in a negative pressure manner. Back into the injection connector, such reciprocating operation will generate air backflow pressure, causing the patient to bear the pain caused by the positive pressure expansion of the blood vessel when injecting the medicine for no reason. May cause superinfection.

Therefore, the utility model proposes a needle-free connector module with a reasonable design and which effectively improves the above defects.

Contents of the invention

The main purpose of the present utility model is to provide a needle-free connector module, which has a good airtight effect and can avoid air or medicine residue and backflow of medicine or blood.

In order to achieve the above-mentioned purpose, the utility model provides a needle-free connector module for connecting an injection syringe and a guide tube, which includes a needle-free nut, an elastic valve, and a valve assembled on the elastic valve. Elastic support and a medicine-adding cap. The needle-free nut is provided with a liquid medicine inflow pipe and a surrounding wall, a partition is formed between the liquid medicine inflow pipe and the surrounding wall, and the liquid medicine inflow pipe is connected to the guide tube; the dosing cap and the needle-free nut Assembled with each other, the dosing cap has an opening for the injection syringe to be inserted and a hollow cavity communicating with the opening; the elastic valve is arranged on the needle-free nut and accommodated in the hollow cavity, and the elastic valve has a An upper valve body and a hollow lower valve body, the upper valve body includes a top valve part, a middle valve part and a bottom valve part, the hollow lower valve body communicates with the liquid medicine inflow pipe, the upper valve body corresponds to the injection needle The barrel is provided with a longitudinal slit, which extends from the top valve part through the middle valve part and enters the bottom valve part; the elastic support is arranged on the needle-free nut and accommodated in the hollow cavity, and the elastic support has a The bracket body and multiple elastic support ribs.

In an embodiment of the present invention, a plurality of elastic supporting ribs are integrally formed with the bracket body, and the elastic bracket leans against the cavity wall of the hollow cavity.

In one embodiment of the present invention, the bracket body has a hollow cylinder and at least one positioning body, the hollow lower valve body is penetrated through the hollow cylinder, and each elastic support rib extends obliquely from the hollow cylinder to at least one positioning body , at least one positioning body leans against the cavity wall of the hollow cavity, and the hollow cylinder corresponds to the liquid medicine inflow tube.

In an embodiment of the present invention, the top end of the hollow cylinder has at least one tapered notch.

In an embodiment of the utility model, the partition is further provided with a ring wall, the elastic bracket leans against the ring wall, and the hollow lower valve body leans against the partition of the needle-free nut.

In an embodiment of the present invention, the top valve part is further provided with a fixed cover, the top valve part protrudes from the opening, and the fixed cover is assembled on the opening.

In one embodiment of the present invention, the inner side wall of the hollow lower valve body and the bottom valve part define a housing cavity, the housing cavity has a cavity opening, and the liquid medicine inflow tube is set on the cavity opening and communicates with the cavity , the stent body has a body opening corresponding to the cavity opening.

In an embodiment of the present invention, the opening of the medicine feeding cap is provided with a plurality of protrusions, and the top valve part is provided with a plurality of perforations corresponding to the plurality of protrusions.

In an embodiment of the present invention, the cross-section of the middle valve part is smaller than the cross-section of the top valve part and smaller than the cross-section of the bottom valve part. The utility model has the following beneficial effects:

1. In the needle-free connector module of the present invention, when the elastic valve is maintained in a preset shape without external force, the slit of the upper valve body is airtightly closed, which can effectively block the entry of external air or medicine.

2. In the needle-free connector module of the present invention, the elastic valve is assembled with an elastic bracket, which can effectively control the deformation and return positioning of the elastic valve.

In order to further understand the characteristics and technical content of this creation, please refer to the following detailed description and drawings of the utility model. However, the drawings are only for reference and illustration, and are not used to limit the utility model.

Description of drawings

Fig. 1 is a three-dimensional exploded view of the needle-free connector module of the present invention;

Fig. 2 is a three-dimensional exploded view of another viewing angle of the needle-free connector module of the present invention;

Fig. 3 is a three-dimensional sectional view of the needle-free connector module of the present invention;

Fig. 4 is a three-dimensional cross-sectional view of another angle of view of the needle-free connector module of the present invention

Fig. 5 is a three-dimensional combination diagram of the needle-free connector module of the present invention;

FIG. 6A is a schematic diagram (1) of the operation of the needle-free connector module of the present invention; and

FIG. 6B is a schematic diagram (2) of the operation of the needle-free connector module of the present invention.

Wherein, the reference signs are explained as follows:

100 Pinless Connector Module

10 needle-free nuts

101 Liquid medicine inflow tube

102 fence

103 Partition

104 ring wall

20 elastic valve

201 upper valve body

201a Top valve part

201b Valve Department

201c Bottom valve part

201d perforation

202 hollow lower valve body

202a inner wall

203 Accommodating cavity

203a cavity opening

30 elastic bracket

301 bracket body

301a hollow cylinder

301b positioning body

301c body opening

301d notch

302 elastic support rib

40 dosing cap

401 opening

401a bump

402 hollow cavity

402a Upper half

402b Lower half

403 cavity wall

50 fixed cover

SY Syringes

TU guide tube

SL slit

MD fluid

Cross section of TCS top valve

Cross section of valve part in MCS

Cross section of BCS bottom valve

Detailed ways

Please refer to FIG. 1 to FIG. 5 , the utility model provides a needle-free connector module 100 for connecting an injection syringe (as shown in FIG. 6A ) and a guide tube (as shown in FIG. 6A ). The needle-free connector module 100 It includes a needle-free nut 10 , an elastic valve 20 , an elastic bracket 30 assembled on the elastic valve 20 and a medicine-feeding cap 40 . As shown in Figure 1 and Figure 5, the needle-free nut 10 and the dosing cap 40 are assembled with each other, and the elastic valve 20 and the elastic bracket 30 are both accommodated between the needle-free nut 10 and the dosing cap 40; , the elastic valve 20 has an upper valve body 201 and a hollow lower valve body 202, since the upper valve body 201 has a longitudinal slit SL, and the slit SL has a closed state and a stretched state, when the elastic valve 20 is not When the preset shape is maintained by an external force, the slit SL can be in an airtight closed state, thus effectively preventing external air or medicine from entering the needle-free connector module 100 to maintain a sterile state in the elastic valve 20 . As shown in Figure 2, since the elastic bracket 30 is assembled on the elastic valve 20, and the elastic bracket 30 abuts against and is accommodated in the hollow cavity 402 of the dosing cap 40, when the injection syringe enters the elastic valve 20, the elastic bracket 30 is pressed against the elastic valve 20, so that the elastic valve 20 is pressed against the injection syringe, and the elastic bracket 30 can effectively increase the pressure on the elastic valve 20, so that the elastic valve 20 can get a positive pressure in order to achieve needle-free zero negative pressure effect, and the elastic bracket 30 can control the deformation and return positioning of the elastic valve 20 . Specific embodiments of the invention will be described in detail below.

Please refer to FIG. 1 to FIG. 5 again. FIG. 1 is a three-dimensional exploded view of the needle-free connector module of the present invention, and FIG. 2 is a three-dimensional exploded view of the needle-free connector module of the present invention from another perspective. As shown in Figures 1 and 2, the needle-free connector module 100 of the present invention consists of a needle-free nut 10, an elastic valve 20, an elastic bracket 30 assembled on the elastic valve 20, a dosing cap 40 and a The fixed cover 50 is composed of; wherein, the needle-free nut 10 can be provided with a liquid medicine inflow pipe 101 and a surrounding wall 102, and a partition 103 is formed between the liquid medicine inflow pipe 101 and the surrounding wall 102, and the liquid medicine inflow pipe 101 The two ends of each can respectively protrude from the opposite sides of the partition 103, and the partition 103 can be further provided with a ring wall 104; wherein, the diameters of the two ends of the above-mentioned liquid medicine inflow pipe 101 can be different, and the medicine liquid inflow pipe 101 can be different in diameter. One end of 101 can be used to sleeve a guide tube (as shown in FIG. 6A ), and the elastic valve 20 can be against the ring wall 104 (as shown in FIG. 4 ). The above-mentioned needle-free nut 10 can be molded from hard plastic, but not limited thereto.

The dosing cap 40 is assembled with the needle-free nut 10, and the dosing cap 40 has an opening 401 for inserting the injection syringe SY (as shown in FIG. 6A ) and a hollow cavity 402 communicating with the opening 401, and the elastic The valve 20 and the elastic bracket 30 can be accommodated in the hollow cavity 402 (as shown in FIG. 4 ). Please refer to FIG. 4, which is a three-dimensional cross-sectional view of another perspective of the needle-free connector module of the present invention. It can be clearly seen from FIG. The inner diameter of the lower half 402b of 402 is larger than the volume of the hollow lower valve body 202, so when the elastic valve 20 is squeezed and deformed, the dosing cap 40 can provide a space for the elastic valve 20 to elastically deform.

The elastic valve 20 is arranged on the needle-free nut 10, and the elastic valve 20 has an upper valve body 201 and a hollow lower valve body 202 connected to the upper valve body 201 and sleeved on the liquid medicine inflow pipe 101, so that the hollow lower valve body 202 communicates with the liquid medicine inflow pipe 101 . Please refer to FIG. 3 and FIG. 4 together. FIG. 3 is a three-dimensional sectional view of the needle-free connector module of the present invention, and FIG. 4 is a three-dimensional sectional view of the needle-free connector module of the present invention from another perspective; the upper valve body of the elastic valve 20 201 includes a top valve portion 201a, a middle valve portion 201b and a bottom valve portion 201c, and a slightly tapered accommodation chamber 203 is formed inside the hollow lower valve body 202. In this embodiment, due to the accommodation The cavity 203 has a cavity opening 203a, so the liquid medicine inflow tube 101 can be sleeved on the cavity opening 203a to communicate with the accommodating cavity 203 . As shown in Figure 3, the upper valve body 201 of the elastic valve 20 is provided with a longitudinal slit SL, and the slit SL extends from the top valve part 201a through the middle valve part 201b and enters the bottom valve part 201c, and the slit SL corresponds to the capacity Set cavity 203. The slit SL is usually in a closed state by default, and can be stretched to form a hole (as shown in Figure 6B). Therefore, when the slit SL is in the stretched state, the slit SL can flow in with the accommodating cavity 203 and the liquid medicine. Tube 101 is connected.

It should be noted that, as shown in FIG. 1 , the opening of the dosing cap 40 is provided with a plurality of protrusions 401a, and the top valve portion 201a of the elastic valve 20 is provided with a plurality of perforations 201d corresponding to the plurality of protrusions 401a. , so the elastic valve 20 can be sleeved on the opening 401 of the dosing cap 40 through the plurality of perforations 201d. In this embodiment, the plurality of protrusions 401a are equidistantly arranged around the opening 401; in addition, The top valve part 201a can be further provided with a fixed cover 50. When the elastic valve 20 is sleeved on the opening 401 of the dosing cap 40, the fixed cover 50 can affix the top valve part 201a to the dosing cap 40 by means of ultrasonic welding; The top valve part 201a is fixedly connected to the opening 401 of the dosing cap 40 through the fixed cover 50, and the hollow lower valve body 202 is against the partition plate 103, so when the injection syringe SY (as shown in FIG. 6A ) is inserted into the elastic valve 20 , the rotation or vertical displacement of the elastic valve 20 relative to the dosing cap 40 and the needle-free nut 10 will not be caused, which increases the practicability. The above-mentioned elastic valve 20 can be made of soft plastic, rubber or silicone, but not limited thereto. In this embodiment, the elastic valve 20 is made of soft silicone material, so that the elastic valve 20 has elasticity and can be The external force deforms and returns to its original shape after the external force disappears.

As shown in Figures 1 and 2, the elastic bracket 30 has a bracket body 301 and a plurality of elastic support ribs 302; wherein, the bracket body 301 has a hollow cylinder 301a and at least one positioning body 301b, and the plurality of elastic supports The rib 302 is integrally formed with the bracket body 301 , and the hollow lower valve body 202 of the elastic valve 20 is passed through the hollow cylinder 301 a, and the hollow cylinder 301 a corresponds to the liquid medicine inflow tube 101 . In this specific embodiment, the elastic bracket 30 has two ring-shaped positioning bodies 301b symmetrically arranged at both ends of the bracket body 301 up and down, while the hollow cylinder 301a is composed of two symmetrical arc-shaped structures (not labeled), and the An appropriate space is formed between the two arc-shaped structures for the hollow lower valve body 202 to pass through the space, and the two arc-shaped structures can respectively butt against opposite side walls (not labeled) of the hollow lower valve body 202 left and right.

It is worth noting that the top end of the hollow cylinder 301a of the elastic support 30 has a tapered notch 301d. When the injection syringe SY (as shown in FIG. 6A ) is inserted into the elastic valve 20, the notch 301d can guide the injection syringe SY is smoothly guided into the hollow cylinder 301a of the elastic support 30, so that the hollow cylinder 301a clamps the injection syringe SY (as shown in FIG. 6A ). In addition, because the bracket body 301 has a body opening 301c, and the body opening 301c corresponds to the cavity opening 203a of the accommodating cavity 203, and the area of the body opening 301c is larger than the opening area of the cavity opening 203a, so when the elastic bracket 30 and the elastic valve 20 During assembly, the medical solution inflow tube 101 is sheathed on the chamber opening 203 a, so that the medical solution inflow tube 101 communicates with the accommodating cavity 203 . The aforementioned elastic bracket 30 is made of elastic material. In this embodiment, the elastic supporting rib 302 of the elastic bracket 30 is a plastic elastic sheet.

Please refer to Fig. 2 and Fig. 5 together. Fig. 5 is a three-dimensional combination diagram of the needle-free connector module of the present invention. When assembling the needle-free connector module 100 of this invention, firstly, the elastic valve 20 can be passed through the dosing cap 40 Then it is combined with the elastic bracket 30. At this time, the hollow lower valve body 202 of the elastic valve 20 is installed in the hollow cylinder 301a of the elastic bracket 30. At this time, the two positioning bodies 301b of the bracket body 301 can respectively abut against each other up and down. on the cavity wall 403 of the hollow cavity 402 of the dosing cap 40 . Then, the dosing cap 40 is assembled to the needle-free nut 10, so that one of the positioning bodies 301b of the bracket body 301 abuts against the ring wall 104 of the needle-free nut 10 (as shown in Figure 4), and the hollow bottom The valve body 202 leans against the partition 103 of the needle-free nut 10; the liquid medicine inflow pipe 101 passes through the body opening 301c of the bracket body 301 and is sleeved on the cavity opening 203a of the accommodating chamber 203, so that the liquid medicine flows into the pipe 101 It communicates with the accommodating cavity 203, and finally, the fixed cover 50 is assembled to the dosing cap 40 to complete the assembly of the needle-free connector module 100. Therefore, the needle-free connector module 100 of the present invention has simple assembly steps and easy assembly directions. It has the advantages of clear sex and effective saving of man-hours. In addition, since the cost of the elastic valve 20 and the elastic support 30 are low and easy to disassemble, the production and maintenance costs can be greatly reduced, which is highly economical. The actual operation of the needle-free connector module 100 of the present invention will be described in detail as follows.

Please refer to Fig. 6A and Fig. 6B, Fig. 6A is the operation diagram (1) of the needle-free connector module of the present invention, and Fig. 6B is the operation diagram (2) of the needle-free connector module of the present invention; Fig. 6A and As shown in Fig. 6B, when the needle-free connector module 100 of the present invention is to be used, the injection syringe SY can be inserted from the opening 401 of the dosing cap 40 and assembled with the dosing cap 40, while the guide tube TU is The medical solution inflow tube 101 assembled in the needle-free nut 10 . As shown in Figure 6A, when the injection syringe SY has not been inserted into the opening 401 of the dosing cap 40, the hollow cylinder 301a of the elastic bracket 30 is pre-pressed on the hollow lower valve body 202 of the elastic valve 20, so that the elastic valve 20 is firmly placed In the elastic bracket 30; as shown in FIG. 6B, when the injection syringe SY is inserted into the opening 401 of the dosing cap 40 and presses the elastic valve 20 downward, the injection syringe SY passes through the top and bottom along the slit SL. The top valve part 201a, the middle valve part 201b and the bottom valve part 201c of the valve body 201 reach the hollow lower valve body 202. At this time, the elastic valve 20 flexes and deforms in the hollow cavity 402, so that the top valve part 201a, the middle valve part 201b The bottom valve portion 201c and part of the inner side wall 202a of the hollow lower valve body 202 are tightly attached to the injection syringe SY. At this time, the injection syringe SY squeezes the elastic valve 20 and exerts a force on the elastic bracket 30, and The elastic bracket 30 exerts a reaction force from the cavity wall 403 of the hollow cavity 402 on the elastic valve 20 through the elastic supporting rib 302. Therefore, when the injection syringe SY squeezes the elastic valve 20, due to the deformation of the elastic bracket 30, During the injection process, positive pressure can be provided to allow the fluid to apply positive pressure directly to the patient, so it can improve the occurrence of negative pressure backflow and achieve the effect of zero negative pressure without needles.

It should be noted that, please refer to Fig. 4, Fig. 6A and Fig. 6B together, because the cross-section MCS of the middle valve part 201b is smaller than the cross-section TCS of the top valve part 201a, and the cross-section MCS of the middle valve part 201b is smaller than the bottom valve part 201c cross-section BCS, which is similar to the H-shaped design, so that the upper valve body 201 has excellent compression resistance; in addition, because the plurality of elastic support ribs 302 of the bracket body 301 are obliquely and symmetrically formed from the hollow cylinder 301a Extending to the positioning body 301b against the cavity wall 403, the bracket body 301 can provide uniform rigid support for the elastic valve 20. When the elastic valve 20 is vertically compressed and deformed by an external force, the elastic bracket 30 can effectively reduce the overall pressure of the elastic valve 20. The up and down deformation caused by the extrusion of the injection syringe SY prolongs the service life of the elastic valve 20; moreover, since the top valve part 201a of the elastic valve 20 is fixedly connected to the opening 401 of the dosing cap 40 through the fixed cover 50, Therefore, when the injection syringe SY squeezes the top valve part 201a, the top valve part 201a only deforms left and right, and will not be pushed down into the accommodating cavity 203 along with the injection syringe SY, thereby affecting the injection syringe. The state of the fluid MD (such as medicine) in SY entering the medicine liquid inflow tube 101, such as the flow rate and so on. When the injection syringe SY leaves the opening 401 of the dosing cap 40, since the slit SL of the upper valve body 201 is airtightly closed, it can effectively block the re-entry of external air or medicine, and prevent the medicine and blood in the patient's body from being separated. Backflow; In addition, since the elastic valve 20 is assembled with an elastic bracket 30, it can effectively prevent the elastic valve 20 from increasing the air backflow pressure due to excessive rebound and reduce the pain of the patient.

To sum up, the needle-free connector module of this creation has the following advantages:

1. For the needle-free connector module of the present utility model, when the elastic valve is not subjected to external force and is maintained in a preset shape, the slit of the upper valve body is airtightly closed, which can effectively prevent the entry of external air or medicine and the patient's body. Backflow of medicine and blood.

2. The needle-free connector module of the utility model, since the elastic valve is assembled with an elastic bracket, it can effectively make the elastic valve obtain positive pressure to achieve the effect of zero negative pressure without needles, and can control the deformation and return positioning of the elastic valve , which can avoid increasing the air return pressure due to too fast rebound and reduce the patient's pain.

3. The needle-free connector module of the present invention can utilize the deformation of the elastic bracket to provide positive pressure during the injection process so that the fluid can directly apply positive pressure towards the patient, thereby improving the occurrence of negative pressure reflux.

4. The structure design of the needle-free connector module of the utility model, whose elastic valve is assembled on the dosing cap and the needle-free nut, will not cause the elastic valve to rotate or move up and down when the injection syringe is inserted into the elastic valve.

5. The bracket body of the needle-free connector module of the present utility model can provide uniform and rigid support for the elastic valve, so it can prevent the elastic valve from entering the accommodating cavity due to being squeezed by the injection syringe, affecting the flow rate of the medicine entering .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the scope of the claims of the present utility model. Therefore, all equivalent changes made by using the content of this creation manual and accompanying drawings are all included in this utility model in the same way. within the scope of the claims of the novelty.

Claims (9)

1. A needle-free connector module, which connects an injection syringe and a guide tube, is characterized in that it comprises: A needle-free nut, which has a liquid medicine inflow tube and a surrounding wall, a partition is formed between the liquid medicine inflow tube and the surrounding wall, and the liquid medicine inflow tube is connected to the guide tube; A dosing cap, which is assembled with the needle-free nut, the dosing cap has an opening for the injection syringe to be inserted and a hollow cavity communicating with the opening; An elastic valve, which is arranged on the needle-free nut and accommodated in the hollow cavity, the elastic valve has an upper valve body and a hollow lower valve body, the upper valve body includes a top valve part, a middle valve part and a bottom valve part, the hollow lower valve body communicates with the liquid medicine inflow pipe, the upper valve body is provided with a longitudinal slit, and the slit extends from the top valve part through the middle valve part and enters the bottom valve Department; and An elastic bracket assembled on the elastic valve is arranged on the needle-free nut and accommodated in the hollow cavity. The elastic bracket has a bracket body and a plurality of elastic supporting ribs. 2 . The needle-free connector module according to claim 1 , wherein the plurality of elastic support ribs are integrally formed with the bracket body, and the elastic bracket leans against the cavity wall of the hollow cavity. 3 . 3. The needle-free connector module according to claim 2, wherein the bracket body has a hollow cylinder and at least one positioning body, the hollow lower valve body is passed through the hollow cylinder, and each of the elastic The supporting rib extends obliquely from the hollow cylinder to the at least one positioning body, the at least one positioning body is against the cavity wall of the hollow cavity, and the hollow cylinder corresponds to the liquid medicine inflow tube. 4. The needle-free connector module as claimed in claim 3, wherein the top of the hollow cylinder has at least one tapered notch. 5. The needle-free connector module according to claim 3, wherein a ring wall protrudes from the partition, the elastic bracket leans against the ring wall, and the hollow lower valve body leans against the needle-free connector module. the spacer on the nut. 6 . The needle-free connector module as claimed in claim 1 , wherein the top valve part is further provided with a fixing cover, the top valve part protrudes from the opening, and the fixing cover is assembled on the opening. 7. The needle-free connector module according to claim 1, characterized in that: the inner side wall of the hollow lower valve body and the bottom valve part define a storage cavity, the storage cavity has a cavity opening, and the medicine The liquid inflow tube is sleeved on the cavity opening and communicated with the accommodating cavity, and the bracket body has a body opening corresponding to the cavity opening. 8. The needle-free connector module according to claim 1, wherein the opening of the dosing cap is provided with a plurality of protrusions, and the top valve part is provided with a plurality of protrusions corresponding to the plurality of protrusions. perforation. 9. The needle-free connector module as claimed in claim 1, wherein the cross-section of the middle valve portion is smaller than the cross-section of the top valve portion and smaller than the cross-section of the bottom valve portion. the

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