TWM469076U - Needle-free connector module - Google Patents

Description

Needleless connector module (3)

The invention belongs to an injection connector, in particular to a needleless connector module (3) without positive and negative pressure, which has good airtight effect, can avoid air residue and counterflow of medicament.

Conventional syringe syringes are common medicinal devices, however, syringe syringes are dangerous and therefore require recycling, resulting in increased medical costs. Therefore, a needleless injection connector has been developed in combination with a needleless syringe for the application of a medicament which is low in risk, can be reused, and avoids the high cost caused by mass recovery.

However, the existing needle-type injection connector has a large amount of voids left inside, and the sealing effect is not good, causing a considerable amount of medicament to remain therein. When the next application of the medicament, the air or the residual medicament is collectively beaten in a positive pressure manner. Into the patient's body, causing improper expansion of the blood vessels, causing pain in the patient, and when the syringe is pumped back, the blood and the medicament will flow back to the injection connector in a negative pressure manner, so that the reciprocating operation causes the patient to bear the application endlessly. When the medicine is applied, the pain caused by the expansion of the blood vessel by the positive pressure, and the return of the blood or body fluid back to the patient's body may also cause repeated infection.

The reason is that the creator feels that the above-mentioned deficiency can be improved, carefully observed and studied, and in conjunction with the application of the theory, proposes a creation that is reasonable in design and effective in improving the above-mentioned deficiency.

The purpose of this creation is to provide a needleless connector module (3), the knot The structure is simple, the cost is low, the airtight leakproof effect is good, and the relative displacement between the elastic valve and the needle-free nut can be avoided at the same time.

In order to achieve the above purpose, the present invention provides a needle-free connector module (3) for connecting an injection syringe and a guiding tube. The needle-free connector module (3) comprises: a needle-free screw The cap includes a partition and at least one positioning convex portion, the partition having an upper surface and a lower surface, the upper surface forming the at least one positioning convex portion, the lower surface forming a medical liquid flow connecting the guiding tube a chemical liquid flow inlet is formed at the intersection of the partition and the chemical liquid inflow tube; an elastic valve is disposed on the needle-free nut, and a cavity is formed inside the elastic valve, and the top of the elastic valve is opposite a slit is formed above the chemical liquid inflow pipe, and a bottom surface of the elastic valve is concavely formed with a positioning groove matching the at least one positioning convex portion, the positioning groove has a specific thickness between the cavity; and a plus The medicine cap is sleeved outside the elastic valve and is assembled with the needle-free nut. The medicating cap has an opening for inserting the injection syringe and a hollow cavity communicating with the opening.

The creation has the following effects: the creation of the needle-free connector module (3) through the positioning convex portion of the needle-free nut and the positioning groove of the elastic valve, so that the injection cylinder squeezes the elastic valve, the elastic valve and the needle-free screw There is no relative displacement between the caps to ensure that the drug solution smoothly enters the body through the drug solution into the tube. In addition, the creation of the needle-free connector module (3) has the advantages of simple assembly steps, clear assembly orientation and easy assembly and disassembly, and only has three components of needle-free nut, elastic valve and dosing cap. Significantly reduce production and maintenance costs, which is extremely economical.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only for reference and explanation, and are not intended to limit the creation.

The detailed description and technical content of the present invention will be described below in conjunction with the drawings, but the drawings are for illustrative purposes only and are not intended to limit the present invention.

[First Embodiment]

Please refer to FIG. 1 to FIG. 4 together. The present invention provides a needle-free connector module (3) for connecting an injection syringe S (FIG. 4) and a guiding tube (not shown). The connector module (3) 1 includes: a needle-free nut 10, an elastic valve 20, and a medicating cap 30; wherein the needle-free nut 10 is assembled with the medicating cap 30 to make the elastic valve 20 It is accommodated in the space formed between the needle-free nut 10 and the medicated cap 30, more specifically, as shown in FIG. 2, since the medicated cap 30 has a needle for inserting the syringe S The opening 301 and a hollow cavity 302 communicating with the opening 301, the elastic valve 20 is assembled in the needle-free nut 10 and received in the hollow cavity 302.

The needle-free nut 10 includes a partition plate 101, at least one positioning convex portion 102 and a chemical liquid inflow pipe 103. The partition plate 101 has an opposite upper surface and a lower surface, and at least one surface is disposed on the upper surface of the partition plate 101. Positioning the convex portion 102, and the chemical liquid inflow pipe 103 connecting the guiding tube is disposed on the lower surface of the partition plate 101; wherein the chemical vapor inflow port 103a is formed at the intersection of the partition plate 101 and the chemical liquid inflow pipe 103, For the liquid to flow into the guiding tube.

A longitudinally perpendicular cavity 201 is formed in the elastic valve 20, and a longitudinal slit SL is defined in the top of the elastic valve 20 above the corresponding chemical liquid inflow pipe 103, and the slit SL has a sealed state and a distracted state. When the elastic valve 20 is maintained in a predetermined shape without an external force, the slit SL can be in a hermetically sealed state, so that the entry of the external air or the medicament can be effectively prevented. The joint module (3) 1 is used to maintain the sterility of the elastomeric valve 20. It is to be noted that, as shown in FIG. 2, since the bottom of the elastic valve 20 is recessed inwardly to form the positioning groove 202 of the at least one positioning protrusion 102 of the needle-free nut 10, the elastic valve 20 is required to be assembled. In the case of the nut 10, at least one positioning protrusion 102 of the needle-free nut 10 is fitted to the positioning groove 202 of the elastic valve 20, so that the elastic valve 20 and the needle-free nut 10 are firmly assembled with each other, and The cavity opening 201a of the cavity 201 is accurately positioned corresponding to the drug solution inlet 103a.

In the present embodiment, when the injection syringe S (Fig. 4) presses the elastic valve 20, the elastic valve 20 is flexibly deformed in the cavity 302 of the needle-free nut 10, at this time, since the needle-free nut 10 is removed. The at least one positioning protrusion 102 can firmly position the elastic valve 20 on the partition 101 of the needle-free nut 10, so that no relative displacement occurs between the elastic valve 20 and the needle-free nut 10, so the capacity of the elastic valve 20 The chamber 201 can accurately correspond vertically and communicate with the drug solution inlet 103a, and the drug solution can smoothly enter the body through the drug solution into the tube 103. In addition, when the needle-free connector module (3) of the present invention is to be assembled, the positioning protrusion 102 of the needle-free nut 10 can be inserted through the positioning groove 202 of the elastic valve 20, and then the medicated cap 30. Combined, the creation of the needle-free connector module (3) has the advantages of simple assembly steps, clear assembly orientation and effective man-hour saving. In addition, the creation of the needle-free connector module (3) has only three components of the needle-free nut 10, the elastic valve 20, and the dosing cap 30, so that the manufacturing and maintenance costs can be greatly reduced, and the economical efficiency is extremely high.

On the other hand, as shown in FIG. 1 , FIG. 2 and FIG. 4 , since the positioning groove 202 of the elastic valve 20 and the cavity 201 have a specific thickness W, the positioning protrusion 102 is inserted into the corresponding positioning concave. The groove 202, so when the elastic valve 20 is deformed by being squeezed by the injection syringe S, the positioning convex portion 102 can be The force of the rigid support of the cavity of the cavity 201 is provided to maintain the internal space of the cavity 201. In other words, the amount of deformation of the internal space of the cavity 201 depends on the length of the positioning protrusion 102 and the depth of the positioning groove 202; for example It is said that if each positioning groove 202 is defined to have a closed end 202b and an open end 202a, the top end of the positioning protrusion 102 is accessed by the open end 202a of the positioning groove 202, and close to the closed end 202b of the positioning groove 202. Therefore, when the elastic valve 20 is pressed by the injection syringe S, the portion of the elastic valve 20 above the closed end 202b of the positioning groove 202 can be pressed by the injection syringe S to deform downward and outward, and the elastic valve The portion of the portion 20 below the closed end 202b of the positioning groove 202 allows the partial cavity 201 to maintain almost the original size space due to the support of the positioning convex portion 102, thereby allowing the liquid medicine to pass through the cavity 201 unimpeded. The chemical liquid flows into the tube 103. In short, the length of the positioning protrusion 102 and the depth of the positioning groove 202 determine the amount of deformation of the inner space of the cavity 201, and the positioning protrusion 102 can provide a part of the cavity wall of the cavity 201 with excellent pressure resistance.

On the other hand, since the contour of the elastic valve 20 is equal to the inner wall profile of the needle-free nut 10, the airtightness and the leakage prevention effect can be effectively increased; and, in addition, the elastic valve 20 and the inner wall of the medicated cap 30 are opposite. The elastic restoring force of the pressure and elastic valve 20 itself can effectively cause the elastic valve 20 to obtain a forward pressure in order to achieve the effect of reducing back flow.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described in detail. Referring to FIG. 1 to FIG. 4, FIG. 1 is an exploded perspective view of the needle-free connector module (3), and FIG. 2 is a needle-free connector module. 3) The three-dimensional exploded view of the other angle, Figure 3 is a three-dimensional combination diagram of the creation of the needle-free connector module (3), and Figure 4 is a schematic diagram of the use of the creation of the needle-free connector (3). The needle-free nut 10 of the present needle-free connector module (3) can be a hard plastic molded type, and the partition 101 thereof The upper and lower surfaces are respectively formed with at least one positioning convex portion 102 and the chemical liquid inflow pipe 103. As can be seen from FIG. 1, the partition plate 101 is a flat top surface of the needle-free nut 10; wherein at least one positioning convex portion 102 Formed on the upper surface of the partition 101 and extending upward, and the chemical liquid inflow tube 103 is formed on the lower surface of the partition 101 and extends downward; the outer diameter of the chemical liquid inflow tube 103 corresponds to the guide tube The inner diameter causes the guide tube to be tightly placed at the mouth of the liquid chemical inflow tube 103.

The at least one positioning protrusion 102 of the needle-free nut 10 is matched with the size and position of the corresponding positioning groove 202. Preferably, the positioning protrusion 102 and the spacer 101 of the needle-free nut 10 are perpendicular to each other. And the positioning protrusions 102 are circumferentially and equidistantly disposed around the chemical liquid inlet 103a. In the present embodiment, as shown in FIG. 1 and FIG. 2, the positioning convex portion 102 has a fixing portion 102a and a self-fixing portion 102a extending toward the slit SL in a free portion 102b, and the positioning convex portion 102. The corresponding positioning groove 202 is a docking space in which at least one positioning convex portion 102 is located, so that the positioning convex portion 102 is positioned and inserted into the docking space, so that the free portion 102b of the positioning convex portion 102 is close to the positioning concave portion. When the closed end 202b of the groove 202 and the fixing portion 102a of the positioning protrusion 102 abut against the open end 202a of the positioning groove 202, the elastic valve 20 can be firmly placed on the needle-free nut 10 without being easily shaken. The number and shape of the positioning protrusions 102 are not limited, and the number of the positioning protrusions 102 may be one, two or more, and the sectional shape of the positioning protrusions 102 may be triangular, diamond, rectangular, polygonal or curved, etc.; For example, the positioning protrusions 102 can be two elastic arms (FIG. 2) or arcuate protrusions (not shown) disposed opposite to the periphery of the drug solution inlet 103a, and thus are familiar to those skilled in the relevant art. The change of the positioning convex portion 102 should belong to the application scope of the present creation.

It is to be noted that since the chemical liquid inlet 103a of the needle-free nut 10 has a ring slope 103b which is tapered from the outside and the inside, and the maximum outer diameter of the ring slope 103b is equal to the inner diameter of the cavity 201, the elastic valve 20 The cavity 201 can be completely and seamlessly sleeved over the liquid chemical inflow pipe 103. Therefore, when the liquid in the injection syringe SS (Fig. 5) passes through the cavity 201, it can smoothly along the ring slope 103b. Slide into the drug solution into the tube 103 without leaking.

The elastic valve 20 can be made of soft plastic, silicone or rubber material, but not limited thereto, and the outer surface of the elastic valve 20 is formed with a vertical section 205, a tapered section 206 connecting the vertical section 205, and a connecting cone section 206. Abutting portion 207, the bottom surface of the abutting portion 207 is concavely formed with a positioning groove 202; preferably, the lower edge of the abutting portion 207 of the elastic valve 20 is further extended outward to form a disc-like structure 208, and dosing The bottom of the cap 30 forms an annular sleeve 303 that can be sleeved on the disc-shaped structure 208. Therefore, when the elastic valve 20 is positioned and inserted by the positioning protrusion 102 and is assembled on the needle-free nut 10, the elastic valve 20 is assembled. 20 can be securely assembled between the dosing cap 30 and the needle-free nut 10. Further, as shown in FIG. 1 and FIG. 2, the annular sleeve 303 at the bottom of the medicated cap 30 has a first edge 303a and a second edge 303b which is connected in a fold to the first edge 303a, and An edge 303a abuts against the upper surface of the disc-shaped structure 208, and the second edge 303b abuts against the ring sidewall of the disc-shaped structure 208, so that the disc-shaped structure 208 can be simultaneously gripped from the medicated cap 30 and the needle-free nut 10 The force is further ensured that when the elastic valve 20 is squeezed, the rotation or movement of the elastic valve 20 relative to the medicated cap 30 and the needle-free nut 10 is not caused, which increases the practicality. On the other hand, the outer diameter of the disc-like structure 208 is slightly smaller than the outer diameter of the partition 101 (i.e., the contour of the disc-like structure 208 is slightly smaller than the contour of the partition 101), so that the disc-like structure 208 can be added to the abutment section 207. Bottom area, and The elastic valve 20 is stably stood on the partition 101 by the disk-like structure 208.

The medicating cap 30 is molded of a hard plastic material. As is clear from FIG. 4, the contour of the upper half of the inner wall of the medicating cap 30 corresponds to the tapered section 206 and the abutting section 207 of the elastic valve 20. The contours are used to increase the airtightness and leakage prevention. Further, since the outer surface of the elastic valve 20 has a trapezoidal structure, the trapezoidal structure can provide a space for elastic deformation when the elastic valve 20 is pushed and elastically deformed. Further, since the outer wall of the elastic valve 20 abuts against the inner wall of the applicator cap 30, the trapezoidal structure is designed to facilitate the squeezing movement of a small amount of gas existing between the outer wall of the elastic valve 20 and the inner wall of the applicator cap 30. Space.

Please refer to FIG. 4, and the operation principle of the creation of the needle-free connector module (3) will be described below. When the present invention is used, when the syringe S of the needleless seat is pressed down the elastic valve 20, the elastic valve 20 is forced to compress downward, and the needle will abut against the slit SL. After that, the medical staff pushes the push rod of the injection syringe SS to pass the fluid (drug or nutrient) through the cavity 201, and then flows into the chemical solution into the tube 103 due to the gravity of the fluid itself, and then enters the guiding tube. Then flow into the patient. When the injection syringe S leaves the opening 301 of the dispensing cap 30, since the slit SL at the top of the elastic valve 20 is in a hermetically sealed state, it can effectively block the re-entry of external air or medicine, and avoid the medicine and blood in the patient's body. In addition, since the elastic valve 20 is provided with the elastic positioning protrusion 102, the elastic valve 20 can be effectively prevented from increasing the back pressure due to the rebound, thereby reducing the pain of the patient.

[Second embodiment]

Please refer to FIG. 5A to FIG. 5C together, FIG. 5A is an exploded perspective view of another embodiment of the creation of the needle-free connector module (3), and FIG. The connector module (3) is another perspective view of another embodiment, and FIG. 5C is a schematic view of another embodiment of the creation of the needle-free connector module (3); wherein the needle-free nut 10 is provided The structure of the medicated cap 30 is as described in the first embodiment, and therefore will not be described herein. The difference between the embodiment of FIGS. 5A and 5C is that the inner side wall of the elastic valve 20 is further provided with at least one thick portion 203 at an appropriate position, and the cavity 201 is at least one thick portion. The 203 is separated to form a first content chamber 201b and a second content chamber 201c; wherein the slit SL is radially connected to the first content chamber 201b and the second content chamber 201c, so that the first content chamber 201b and the second content chamber 201c are vertically connected to each other.

As shown in FIG. 5A to FIG. 5C, in the embodiment, the inner side wall of the elastic valve 20 is adjacent to the inner portion of the cavity 201 to form a pair of opposite meat thickness portions 203. The two flesh portions 203 may be inwardly convex, so that a through hole (not labeled) having a small diameter is formed between the two flesh portions 203. When the liquid passes through the through hole, since the liquid is not easily flowed back from the through hole to the first content chamber 201b, each of the second content chambers 201c can be kept clean, effectively increasing the effect of the needle-free near zero negative pressure, and when being compressed When the elastic valve 20 rebounds due to the elastic restoring force, the air return pressure can be prevented from being increased too quickly by the rebound, and the pain of the patient can be alleviated.

It is to be noted that, as shown in FIG. 5C, since the free portion 102b of the positioning convex portion 102 of the needle-free nut 10 extends toward the slit SL direction to at least one meat thick portion 203, when the injection syringe S is pressed elastically When the valve 20 flexes and deforms the elastic valve 20 in the hollow cavity 302, the tapered portion 206 of the elastic valve 20 abuts against the inner wall of the cavity 302 in the charging cap 30 because the two positioning convex portions 102 are distracted. When the two positioning protrusions 102 can effectively apply a reaction force to the fleshy portion 203 of the elastic valve 20, the elastic valve 20 is positively The pressure is increased to achieve the effect of zero needle-free negative pressure. In other words, the two positioning projections 102 provide a function of controlling the deformation and return positioning of the elastic valve 20.

[Third embodiment]

Please refer to FIG. 6A to FIG. 6C together. FIG. 6A is an exploded perspective view of another embodiment of the creation of the needle-free connector module (3), and FIG. 6B is another embodiment of the creation of the needle-free connector module (3). An exploded perspective view of another angle, and FIG. 6C is a schematic view showing the use of the needle-free connector module (3) in another embodiment; wherein the needle-free nut 10 and the medicated cap 30 have the same structure as the second It is described in the embodiment, so it will not be described here. The difference between the embodiment of FIGS. 6A and 6C is that the outer side wall of the elastic valve 20 is further provided with an auxiliary convex portion 204 corresponding to at least one thick portion 203; more specifically, the elastic valve 20 The auxiliary convex portion 204 is formed to extend outwardly at a position corresponding to the at least one thick portion 203 of the outer side wall such that the auxiliary convex portion 204 is interposed between the elastic valve 20 and the dosing cap 30. The shape and number of the auxiliary convex portions 204 are not limited. In the specific embodiment, the auxiliary convex portions 204 may be two elastic lugs having a ring shape and a certain thickness.

It is to be noted that, as shown in FIG. 6C, since the free portion 102b of the positioning convex portion 102 of the needle-free nut 10 extends toward the slit SL to at least one of the thick portion 203 and the auxiliary convex portion 204, When the injection syringe S presses the elastic valve 20 to flexure the elastic valve 20 in the hollow cavity 302, since the auxiliary convex portion 204 shortens the distance between the elastic valve 20 and the inner side wall of the medicating cap 30, the positioning convex portion is positioned. 102 is only slightly extended to abut the auxiliary convex portion 204 against the inner wall of the cavity 302 in the medicated cap 30. In other words, the auxiliary convex portion 204 limits the lateral displacement of the elastic valve 20, that is, effectively limits the thickness of the second meat portion The extent to which the through hole (not numbered) is expanded between 203. With this, The auxiliary convex portion 204 can effectively increase the reaction force of the two positioning convex portions 102 applied to the elastic valve 20, so that the effect of the needle-free zero negative pressure can be achieved.

In summary, this creation has the following beneficial effects:

1. The needle-free connector module (3) of the present invention is matched with the positioning groove of the elastic valve through the positioning convex portion of the needle-free nut, so that the assembly step is simple, the assembly direction is clear, and the working time is saved effectively. Etc.

Second, the creation of the needle-free connector module (3), which has only three components, such as a needle-free nut, an elastic valve, and a dosing cap, can greatly reduce the manufacturing and maintenance costs, and is extremely economical.

3. The needle-free connector module (3) of the present invention is matched with the positioning groove of the elastic valve through the positioning convex portion of the needle-free nut, so that the elastic valve can stably stand on the needle-free nut, so that The elastic valve and the needle-free nut do not produce relative displacement.

4. The needle-free connector module (3) of the present invention has a disc-shaped structure of the elastic valve sandwiched between the needle-free nut and the medicated cap, thereby ensuring the elastic valve relative to the medicated cap and the needle-free snail The cap does not rotate or move.

5. The needle-free connector module (3) of the present invention has at least one thick portion inside the elastic valve, and the positioning convex portion of the needle-free nut extends to the thick portion of the needle, so that the needle-free proximity is effectively increased. The effect of negative pressure can avoid the increase of reflux pressure due to rebound too fast, thereby reducing the pain of the patient.

6. The needle-free connector module (3) of the present invention has at least one thick portion and an auxiliary convex portion corresponding to the thick portion of the elastic valve inside and outside, so that the reaction force applied to the elastic valve can be additionally provided. It also achieves the effect of zero needle and negative pressure.

The above description is only a preferred and feasible embodiment of the present invention, and thus does not limit the scope of the patent of the creation, so the use of the present specification and the drawings The equivalent structural changes of the contents are all included in the scope of this creation and are combined with Chen Ming.

1‧‧‧ Needle-free connector module (3)

10‧‧‧ Needle-free nut

101‧‧‧Baffle

102‧‧‧ positioning convex

102a‧‧‧Fixed Department

102b‧‧Free Department

103‧‧‧Drug flow into the tube

103a‧‧‧ drug solution inlet

103b‧‧‧ring bevel

20‧‧‧Elastic valve

201‧‧‧容容

201a‧‧‧ cavity opening

201b‧‧‧The first content cavity

201c‧‧‧Second content cavity

202‧‧‧ positioning groove

202a‧‧‧Open end

202b‧‧‧closed end

203‧‧‧ meat thick

204‧‧‧Auxiliary convex

205‧‧‧ vertical section

206‧‧‧Cone section

207‧‧‧Reward

208‧‧‧Disc structure

30‧‧‧Adding Cap

301‧‧‧ openings

302‧‧‧ hollow cavity

303‧‧‧ ring set

303a‧‧‧ first edge

303b‧‧‧ second edge

S‧‧‧injection syringe

SL‧‧‧Slit

W‧‧‧thickness

Figure 1 is an exploded perspective view of the needle-free connector module (3) of the present invention; Figure 2 is an exploded perspective view of another angle of the needle-free connector module (3); Figure 3 is a needle-free connector The three-dimensional combination diagram of the module (3); FIG. 4 is a schematic diagram of the use of the creation of the needle-free connector module (3); FIG. 5A is an exploded perspective view of another embodiment of the creation of the needle-free connector module (3) FIG. 5B is a perspective exploded view of another embodiment of the creation of the needle-free connector module (3); FIG. 5C is a schematic view showing another embodiment of the creation of the needle-free connector module (3); 6A is an exploded perspective view of another embodiment of the creation of the needle-free connector module (3); FIG. 6B is an exploded perspective view of another embodiment of the creation of the needle-free connector module (3); 6C is a schematic diagram of the use of the creation of the needle-free connector module (3).

1‧‧‧ Needle-free connector module (3)

10‧‧‧ Needle-free nut

101‧‧‧Baffle

102‧‧‧ positioning convex

102a‧‧‧Fixed Department

102b‧‧Free Department

103‧‧‧Drug flow into the tube

103a‧‧‧ drug solution inlet

103b‧‧‧ring bevel

20‧‧‧Elastic valve

201‧‧‧容容

201a‧‧‧ cavity opening

202‧‧‧ positioning groove

202a‧‧‧Open end

202b‧‧‧closed end

205‧‧‧ vertical section

206‧‧‧Cone section

207‧‧‧Reward

208‧‧‧Disc structure

30‧‧‧Adding Cap

301‧‧‧ openings

SL‧‧‧Slit

W‧‧‧thickness

Claims (15)

A needle-free connector module (3) is connected to an injection syringe and a guiding tube, comprising: a needle-free nut, comprising a partition and at least one positioning protrusion, the partition having an upper a surface and a lower surface, the upper surface forming the at least one positioning convex portion, the lower surface forming a chemical liquid inflow pipe connecting the guiding tube, and forming a medical liquid flow at a junction with the chemical liquid inflow pipe An elastic valve disposed on the needle-free nut, the elastic valve having a cavity formed therein, the cavity having a cavity opening corresponding to the liquid flow inlet, the top of the elastic valve correspondingly a slit is formed above the chemical liquid inflow pipe, and a bottom surface of the elastic valve is concavely formed to form a positioning groove matching the at least one positioning convex portion, the positioning groove has a specific thickness between the cavity; and a dosing a cap disposed outside the elastic valve and assembled with the needle-free nut, the medicating cap having an opening for inserting the syringe and a hollow cavity communicating with the opening; thereby The at least one positioning protrusion cooperates with the positioning groove to make the elastic valve The needle-free nut is combined, when the injection syringe is inserted into the opening and the elastic valve is pressed, the elastic valve is flexibly deformed in the hollow cavity, and there is no relative relationship between the elastic valve and the needle-free nut Displacement. The needle-free connector module (3) of claim 1, wherein the at least one positioning protrusion and the corresponding positioning groove have a size and a position to cooperate with each other. The needle-free connector module (3) of claim 2, wherein the at least one positioning protrusion is disposed at a periphery of the medical fluid inlet. The needle-free connector module (3) of claim 3, wherein the at least one positioning protrusion has a fixing portion and a free portion extending toward the slit direction, and the at least one positioning protrusion Correspondingly, the positioning groove is a docking space in which the at least one positioning protrusion is located, and the at least one positioning protrusion is positioned and inserted into the docking space. The needle-free connector module (3) of claim 4, wherein the inner side wall of the elastic valve is provided with at least one thick portion at an appropriate position, the at least one thick portion separating the cavity Forming a first content cavity and a second content cavity, the slit being radially connected to the first content cavity and the second content cavity. The needle-free connector module (3) of claim 5, wherein the free portion of the positioning protrusion extends toward the slit to the at least one meat thick portion. The needle-free connector module (3) of claim 5, wherein the outer side wall of the elastic valve is provided with an auxiliary protrusion corresponding to the at least one thick portion. The needle-free connector module (3) of claim 7, wherein the free portion of the positioning protrusion extends toward the slit to between the at least one meat thick portion and the auxiliary convex portion. The needle-free connector module (3) of claim 4, 5 or 7, wherein the at least one positioning protrusion is a plurality of elastic arms, and the elastic arms are spaced and equidistantly disposed on the The periphery of the drug solution inlet. The needle-free connector module (3) according to claim 4, 5 or 7, wherein the at least one positioning protrusion is a plurality of arc-shaped protrusions, and the arc-shaped protrusions are spaced and equidistant. The ground is located at the periphery of the chemical liquid inlet. The needle-free connector module (3) according to claim 1, wherein the drug solution inlet has a ring-shaped inclined surface which is tapered from the outside, and the maximum outer diameter of the ring slope is equal to the second content. The inner diameter of the cavity. The needle-free connector module (3) according to claim 11, wherein an outer surface of the elastic valve forms a vertical section, a tapered section connecting the vertical section, and an escaping connecting the tapered section a positioning section, the positioning groove is concavely formed in a bottom surface of the abutting section. The needle-free connector module (3) of claim 12, wherein a partial contour of an inner wall of the medicating cap corresponds to the tapered section and the abutting section, and the elastic valve is externally The diameter is smaller than the inner diameter of the dosing cap to cause the elastic valve to flex and deform within the hollow cavity. The needle-free connector module (3) according to claim 13, wherein the bottom of the medicating cap forms an annular sleeve, and the lower edge of the abutting section extends outward to form a disc-shaped structure, the ring The sleeve abuts against the disc-shaped structure, and the outer diameter of the disc-shaped structure is slightly smaller than the outer diameter of the partition. The needle-free connector module (3) of claim 14, wherein the ring sleeve has a first edge and a second edge, and the second edge is connected to the first edge in a folded manner. An edge abuts against the upper surface of the disc-shaped structure, and the second edge abuts against the side wall of the ring of the disc-shaped structure.