TW201641127A - Needleless medication dispenser - Google Patents

Abstract

A needleless medication dispenser comprises a base, a cover, and an elastic valve. The base comprises a first end, a second end, a protrusion, and a catheter. The first end is formed as a groove. The protrusion and the side wall of the groove define a slot. The catheter is disposed at the second end and formed with a passage linearly penetrating the catheter and the groove bottom. The cover comprises a large-diameter section, a small-diameter section, and a shoulder, wherein the large-diameter section is disposed at the first end; the small-diameter section constitutes a through hole; the shoulder is disposed between the large-diameter section and the small-diameter section; and, the large-diameter section and the shoulder constitute a receiving space. The elastic valve comprises a valve plug and a support structure, wherein the valve plug is coaxial with the passage. The valve plug comprises a head and a base, wherein the head is disposed in the through hole and the base is abutted against the shoulder. The support structure is extended from the base and located on one side of the axis of the valve plug, moreover, it is inserted in the slot with its outer side and the large-diameter section of the cover define a margin space, while its inner side and the base constitute an opened groove.

Description

Needleless dosing device

The present invention relates to a needleless dosing device, and more particularly to a needleless applicator for elastically closing a cover by an elastic valve.

The most common type of injection is a disposable syringe with a needle that is used to puncture the needle into the patient and then push the agent into the patient. However, some critically ill patients need to constantly apply drugs, and must endure the pain of being constantly stabbed by the needle. In order to reduce the suffering of patients, the most common solution at present is to add a dosing device on the infusion tube of the drip bottle or on the upper cover of the measuring cylinder. The patient only needs to take the needle once, and then the medical staff can continuously add the medicine from the doser, so that the medicine can still be continuously sent to the patient's body.

Conventional needleless dispensers include a base, a cover and an elastomeric valve. A hollow groove is formed in the inner portion of the elastic valve, and at least one perforation is formed on the surface thereof. The hollow groove communicates with the passage of the base, and the through hole communicates with the accommodation space of the cover body and the hollow groove. When the medicine is added, the needle-free syringe enters the through hole of the cover body, and then the elastic valve is pressed downward to deform the elastic valve, so as to flow through the housing space of the cover body and the elastic valve after the medicine flows out from the syringe. After the perforation and the passage of the hollow trough and the pedestal, the infusion tube is entered, and finally enters the patient from the infusion tube. After the dosing action is completed, the syringe can be removed and the elastic valve returned to its original shape to reclose the cover to prevent the blood in the medicament or blood vessel from flowing back due to pressure changes.

However, when the elastic valve of the conventional needleless dosing device is deformed, the hole diameter of the perforation is affected and becomes small. It should be noted that the smaller pore diameter of the perforation means that the unit area through which the drug can pass is reduced, so that the flow rate of the drug through the perforation per unit time becomes small, and the rate of all the drugs entering the patient is too slow and the time is too long.

Moreover, the elastic valve of the conventional needleless dosing device often cannot completely seal the cover when the shape is restored, so that the medicament or blood flowing back from the cover body flows out from the cover body, which jeopardizes the health of the medical staff and the surrounding area. surroundings.

The main object of the present invention is to provide a needleless dosing device, wherein the elastic valve support structure extends from the base side of the valve plug and is inserted into the slot, and the elastic valve does not affect the flow of the drug through the elastic valve when the elastic valve is deformed. The flow rate, the total amount of the drug entering the patient's body is stable and the time is shortened, and there is no blocking feeling.

Another object of the present invention is to provide a needleless dispenser in which the passage of the base is linear and the concave hole of the base of the valve plug faces the passage, and when the elastic valve returns to the shape, the countercurrent medicament or blood directly from the base The passage rushes out and strikes the wall of the recess, and the valve plug can completely close the cover by the countercurrent medicament or the force of the blood impact, preventing the backflow of the medicament or blood from flowing out of the cover.

In order to achieve the foregoing objects, the present invention provides a needleless dosing device comprising a base, a cover and an elastic valve.

The base includes a first end portion, a second end portion, a protruding portion and a conduit, the first end portion forming a groove protruding from the bottom surface of the groove, and A slot is defined between the sidewalls of the recess, the conduit is disposed at the second end and defines a passage that extends linearly through the conduit and the bottom surface of the recess.

The cover body includes a large diameter section, a small diameter section and a shoulder portion. The large diameter section is disposed at the first end of the base, and the small diameter section surrounds the consistent hole, and the shoulder is disposed on the large Between the small diameter segments, the large diameter segment and the shoulder portion together define an accommodating space, and the groove communicates between the accommodating space and the channel.

The elastic valve includes a valve plug and a support structure, the valve plug is coaxial with the passage, the valve plug includes a head portion and a base portion, the head portion is disposed at the through hole, and an outer surface of the base portion abuts against the shoulder The inner wall surface of the portion is such that the accommodating space is not in communication with the through hole, the support structure extends from one side of the base portion and is located at one side of the axis of the valve plug, and is inserted into the slot, the support structure The outer side surface and the inner side surface of the large diameter section of the cover body are spaced apart to define a margin space, and the inner side surface of the support structure and the bottom of the base portion of the valve plug respectively define a slot, the slotted The accommodating space is in communication with the channel.

Wherein, when the head of the valve plug of the elastic valve is pressed downward, the support structure is bent toward the margin space, and the head is separated from the through hole to enter the accommodating space, and the valve plug of the elastic valve The base is separated from the shoulder, and the through hole communicates with the accommodating space, and the slot remains in communication with the accommodating space and the channel.

According to a preferred embodiment, the bottom of the base of the valve plug of the resilient valve defines a recess that faces the passage. Wherein, the concave surface of the concave hole is a curved surface. Wherein, the inner side surface of the support structure of the elastic valve forms a concave arc portion, and the concave arc portion is connected to the concave surface of the concave hole and the curvature of the concave arc portion is equal to the curvature of the wall surface of the concave hole. Wherein, the outer surface of the base of the valve plug of the elastic valve is a spherical surface or a tapered surface.

According to a preferred embodiment, the protruding portion is annular around the opening of the channel on one side of the groove and surrounds a slot, and the through slot communicates between the channel and the slot. Preferably, the protruding portion defines at least one longitudinal groove, and the longitudinal groove communicates with the through groove. Wherein, the bottom surface of the groove forms at least one oblique groove extending from the side wall of the groove toward the channel and extending through the bottom of the longitudinal groove to communicate with the channel.

According to a preferred embodiment, the interior of the valve plug of the elastic valve forms an eccentric longitudinal groove, the eccentric longitudinal groove passes through the head and the base, the axis of the eccentric longitudinal groove and the support structure are located at the axis of the valve plug On the same side, the wall surface on one side of the head of the valve plug is spaced from the axis of the valve plug by a greater distance from the wall surface of the other side than the axis of the valve plug.

According to a preferred embodiment, the outer surface of the head of the valve plug forms a notch, and the notch and the supporting structure are located on the same side of the axis of the valve plug, so that the wall surface of the head of the valve plug is The distance of the axis of the plug is greater than the distance of the wall of the other side from the axis of the plug.

The effect of the present invention is that when the elastic valve is deformed, it can be bent in place and provide a large liquid flow space (i.e., the groove). Thereby, the flow rate of the medicine flowing through the elastic valve in a unit time is not reduced, and the speed of all the medicines entering the patient body is more stable and the time is shortened, and there is no blocking feeling at all. Furthermore, the recessed hole can concentrate the countercurrent medicament or blood impact force, so that the outer surface of the base of the valve plug obtains a force to clamp with the inner side of the shoulder, and the function of the valve plug is sealed to prevent the backflow. The returned medicament or blood flows out from the through hole of the cover.

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 is a perspective view of a first embodiment of the present invention, FIG. 2 is an exploded view of a first embodiment of the present invention, and FIG. 3 is another angular decomposition of the first embodiment of the present invention. 4 is a cross-sectional view of the first embodiment of the present invention taken along line AA, and FIG. 5 is a cross-sectional view of the first embodiment of the present invention taken along line BB. The present invention provides a needleless dosing device comprising a base 10, a cover 20 and an elastic valve 30.

The base 10 includes a first end portion 11, a second end portion 12, a projection portion 13, and a conduit 14. The first end portion 11 has a cylindrical shape and defines a groove 111. The second end portion 12 has a cylindrical shape and defines a screw hole 121 for screwing an infusion tube (not shown). The protrusion 13 protrudes from the bottom surface of the groove 111 and defines a slot 15 between the side wall of the groove 111. The catheter 14 extends downward from the top of the screw hole 121 and forms a channel 141 and is inserted into the infusion tube. The passage 141 extends straight through the conduit 14 and the bottom surface of the recess 111. More specifically, the protruding portion 13 is annular around the opening of the channel 141 on the side of the groove 111 and surrounds a through slot 131. The protruding portion 13 defines four longitudinal slots 132 that communicate with the through slots 131. The projection 13 is divided into four sector blocks 133 by its four longitudinal grooves. The thickness of each of the segments 133 is gradually thinner from the bottom surface of the groove 111, and the inner side of each of the segments 133 is perpendicular to the bottom surface of the groove 111 and radially concavely forms a concave curved surface. The outer diameter of the outer side of each of the sector blocks 133 near the bottom surface of the groove 111 is larger than the outer diameter of the outer side of each of the sector blocks 133 away from the bottom surface of the groove 111. Therefore, from the appearance thereof, the angle between the outer side surface of each of the sector blocks 133 and the bottom surface of the groove 111 is an obtuse angle greater than ninety degrees. The sidewall of the groove 111 includes a large diameter section 1111, a small diameter section 1112, and a shoulder 1113. The small diameter section 1112 is adjacent to the bottom surface of the groove 111 and defines the slot 15 with the protrusion 13 . The shoulder portion 1113 is disposed between the large and small diameter segments 1111 and 1112, and an inner diameter thereof gradually increases from the small diameter portion 1112 to the large diameter portion 1111. In addition, a top portion of the first end portion 11 defines a first joint portion 112 which is in the shape of a column. The bottom surface of the recess 111 defines four oblique grooves 1114 extending downward from the small diameter section 1112 of the sidewall of the recess 111 toward the channel 141 and extending through the longitudinal direction. The bottom of the slot 132 is in communication with the channel 141.

The cover 20 includes a large diameter section 21, a small diameter section 22 and a shoulder portion 23. A second joint portion 211 is formed at the bottom of the large diameter portion 21 . The second joint portion 211 is in a class shape corresponding to the first joint portion 112 , and the second joint portion 211 is coupled to the first joint portion 112 . The outer side surface of the small diameter section 22 is formed with a thread, and the inner side surface of the small diameter section 22 surrounds the constant hole 221. The shoulder portion 23 is disposed between the large and small diameter segments 21, 22, and the inner side surface of the shoulder portion 23 is tapered from the large diameter portion 21 toward the small diameter portion 22 and has an arc shape. The large-diameter section 21 and the shoulder 23 together define an accommodating space 24, and the accommodating space 24 communicates with the recess 111.

The elastic valve 30 includes a valve plug 31 and a support structure 32. The valve plug 31 includes a head portion 311 and a base portion 312. The head portion 311 has a first sealing portion 3111 formed at the top end thereof. The head portion 311 is disposed in the through hole 221, and the first sealing portion 3111 abuts against the hole of the through hole 221 to close the through hole. Hole 221, as shown in FIG. In the present embodiment, the inside of the valve plug 31 forms an eccentric longitudinal groove 313. The eccentric longitudinal groove 313 passes through the head portion 311 and the base portion 312 but does not penetrate the top end of the head portion 311. The axis 314 of the valve plug 31 is coaxial with the axis 1411 of the passage 141. The axis 3131 of the eccentric longitudinal groove 313 does not overlap the axis 314 of the valve plug 31, but is located on one side thereof, so that the wall surface of one side of the head 311 of the valve plug 31 and the axis 314 of the valve plug 31 The distance is greater than the distance between the wall of the other side and the axis of the valve plug 31. As seen from Fig. 4, the wall of one side of the head portion 311 of the valve plug 31 is thinner in the cross-sectional view taken along line A-A of Fig. 1, and the wall on the other side is thicker. Wherein, the eccentric longitudinal groove has a semicircular cross section. The outer surface of the base portion 312 is a spherical surface and abuts against the inner side surface of the shoulder portion 23, so that the accommodating space 24 is not in communication with the through hole 221 . In other embodiments, the outer surface of the base 312 can also be a tapered surface. A recessed hole 3121 is formed in the middle of the bottom of the base portion 312, and the recessed hole 3121. faces the through slot 131 and the passage 141. Preferably, the wall surface of the recessed hole 3121 is a curved surface. The arc center of the recessed hole 3121 is located on the axis 314 of the valve plug 31. The eccentric longitudinal groove 313 communicates with the recessed hole 3121, and the cross-sectional area of the eccentric longitudinal groove 312 is larger than the cross-sectional area of the recessed hole 3121. small. The support structure 32 extends from the bottom end side of the base portion 312 to be located on one side of the axis 314 of the valve plug 31 and is located on the same side as the eccentric longitudinal groove 313. More specifically, the support structure 32 includes a connecting section 321 , an extended section 322 , and a fixed section 323 . The connecting portion 321 is connected to the bottom end side of the base portion 312, and a concave arc portion 3211 is formed on the inner side surface thereof. The concave arc portion 3211 is a longitudinally curved arc surface and is connected to the wall surface of the recessed hole 3121. The curvature thereof is equal to the curvature of the wall surface of the recessed hole 3121. In other words, the concave arc portion 3211 and the wall surface of the recessed hole 3112 are a curved continuous surface. The outer side surface of the connecting portion 321 forms a convex arc portion 3212. The convex arc portion 3212 is connected to the outer side surface of the base portion 312, and the curvature of the convex arc portion 3212 is equal to the curvature of the spherical surface of the outer side surface of the base portion 312. In other words, the convex portion 3212 and the outer side surface of the base portion 312 are a curved continuous surface. Preferably, the curvature of the wall surface of the recessed hole 3121 is equal to the curvature of the spherical surface of the outer side surface of the base portion 312, and the curvature of the concave arc portion 3211 is equal to the curvature of the convex arc portion 3212. The extension 322 is disposed between the connecting section 321 and the fixing section 323 , and the extending direction of the extending section 322 is parallel to the axis 314 of the valve plug 31 . A margin space 40 is defined by a distance between the outer side of the extension 322 and the inner side of the large diameter section 21 of the cover 20. The fixing section 323 is inserted into the slot 15 and is slightly inclined with respect to the extending section 322, and the inclination thereof corresponds to the inclination of the outer side surface of the sector block 133 of the protruding portion 13 with respect to the bottom of the groove 111. degree. Through the above technical features, the overall appearance of the support structure 32 is arcuate. In addition, the inner side surface of the extending portion 322 is a laterally curved curved surface whose bending direction is different from the curved direction of the concave curved portion 3211, so that the two are not a curved continuous surface. The inner side surface of the fixing section 323 is a laterally curved lower width and a narrower tapered surface, and the curvature of the inner side surface of the fixing section 323 is equal to the curvature of the outer side surface of each of the sector blocks 133 of the protruding portion 13, The inner side surface of the fixing portion 322 corresponds to the outer side surface of each of the sector blocks 133 of the projection portion 13. Thereby, the inner side surface of the fixing portion 323 abuts against the outer side surface of the sector block 133 of the protruding portion 13. It should be noted that although the bending direction and curvature of the inner side surface of the fixing section 323 are the same as the inner side surface of the extending section 322, since the extending direction of the extending section 322 is parallel to the axis 314 of the valve plug 31, The fixing section 323 is slightly inclined with respect to the axis 314 of the valve plug 31, so that the inner side surface of the extending section 322 and the inner side surface of the fixing section 323 are not a continuous surface. The inner side of the support structure 32 and the bottom of the base 312 of the valve plug 31 together define a slot 33, the slot 33 communicates with the receiving space 24, and the slot 131 communicates with the channel 141 and the opening Between the slots 33.

Referring to Fig. 6, there is shown a schematic view of the elastic valve 30 of the first embodiment of the present invention being pressed and deformed by the syringe 50. When the user adds the medicine, a syringe 50 containing the medicament is firstly inserted into the through hole 221 of the small diameter section 22 of the cover body 20 to press the head 311 of the valve plug 31 of the elastic valve 30 downward. The thinner side of the wall surface of the head portion 311 of the valve plug 31 is bent inwardly, the thicker side of the wall surface is bent outwardly and abuts against the inner side surface of the shoulder portion 23, and the head of the valve plug 31 The first sealing portion 3111 of the portion 311 is inclined at an angle of 45 degrees with respect to the axis of the lid body 20. The connecting portion 321 of the supporting structure 32 is bent inward and downward, and the extending portion 322 of the supporting structure 32 is bent toward the margin space 40, and the outer side of the bottom portion of the fixing portion 323 of the supporting structure 32 is slightly upwardly lifted, so that the The head portion 311 of the valve plug 31 is separated from the through hole 221 of the small diameter portion 22 of the cover body 20 and enters the accommodating space 24, and the base portion 312 of the valve plug 31 is separated from the shoulder portion 23. The through hole 221 is in communication with the receiving portion 24 , and the opening 33 is kept in communication with the through slot 131 and the receiving space 24 . The medicament can smoothly flow from the syringe 50 through the accommodating space 24, the slot 23, the oblique grooves 1114, the longitudinal grooves 132 and the through slots 131 into the channel 141, and further from the channel 141. Flow into the infusion tube and eventually into the patient.

When the syringe 50 is removed from the through hole 221, the support structure 32 of the elastic valve 30 is restored from the bent state to the upright state, and the head 311 of the valve plug 31 of the elastic valve 30 is similarly bent. The state is restored to an upright state. The outer surface of the base portion 312 of the valve plug 31 of the elastic valve 30 is again abutted against the inner side surface of the shoulder portion 23, and the head portion 311 is again located in the through hole 221. Thereby, the valve plug 31 of the elastic valve 30 closes the through hole 221, so that the through hole 221 is no longer connected to the accommodating space 24. It is important to refer to FIG. 4. If the medicament or the patient's blood is reversely flown into the present invention due to pressure changes, the medicament or blood will linearly pass through the passage 141 as indicated by the arrow. The groove 131 and the groove 33 are penetrated and directly impact the wall surface of the recessed hole 3121. The outer surface of the base portion 312 of the valve plug 31 is more tightly engaged with the inner side surface of the shoulder portion 23 of the cover body 20 by the impact force. Thereby, the medicine or blood which is prevented from coming back to flow back is ejected from the through hole 221.

7 to 10, FIG. 7 is an exploded perspective view of a second embodiment of the present invention, FIG. 8 is another angular exploded view of the second embodiment of the present invention, and FIG. 9 is a second embodiment of the present invention. A line AA of Fig. 1 is a cross-sectional view of a corresponding position, and Fig. 10 is a cross-sectional view of the second embodiment of the present invention taken along line BB of Fig. 1. The second embodiment of the present invention is substantially the same as the first embodiment. The difference is that the head 311 of the valve plug 31 does not have the eccentric longitudinal groove, and the outer surface of the head 311 of the valve plug 31 forms a notch 3112. The notch 3112 is located on one side of the axis 314 of the valve plug 31 and is on the same side as the support structure 32 such that the wall surface of one side of the head 311 of the valve plug 31 is greater than the axis 314 of the valve plug 31. The wall of the other side is at a distance from the axis 314 of the valve plug 31. As seen from Fig. 9, the wall surface of one side of the head portion 311 of the valve plug 31 is thinner at a corresponding position taken at line A-A of Fig. 1, and the wall surface on the other side is thicker. In addition, the head portion 311 of the valve plug 31 includes a second sealing portion 3113 protruding from the outer side surface of the head portion 311 of the valve plug 31 and below the first sealing portion 3111. The second sealing portion 3113 abuts against the aperture of the through hole 221, and the through hole 221 is closed more thoroughly with a plurality of protective measures.

Referring to Figure 11, there is shown a schematic view of the elastic valve 30 of the second embodiment of the present invention being pressed and deformed by the syringe 50. When the user adds the medicine, the syringe 50 containing the medicine is firstly inserted into the through hole 221 of the small diameter section 22 of the cover body 20, and the head 311 of the valve plug 31 of the elastic valve 30 is pressed downward to make the The thinner side of the wall surface of the head 311 of the valve plug 31 is bent inwardly, the thicker side of the wall is bent outwardly and abuts against the inner side of the shoulder 23, and the head 311 of the valve plug 31 The first closure portion 3111 is inclined at an angle of 45 degrees with respect to the axis of the lid body 20. The connecting section 321 of the supporting structure 32 is bent downwardly, and the extending portion 322 of the supporting structure 32 is bent toward the margin space 40. The outer side of the bottom of the fixing section 323 of the supporting structure 32 is slightly upwardly lifted, so that the The head portion 311 of the valve plug 31 is separated from the through hole 221 of the small diameter portion 22 of the cover body 20 and enters the accommodating space 24, and the base portion 312 of the valve plug 31 is separated from the shoulder portion 23. The through hole 221 is in communication with the receiving portion 24 , and the opening 33 is kept in communication with the through slot 131 and the receiving space 24 . The medicament can smoothly flow from the syringe 50 through the accommodating space 24, the slot 23, the oblique grooves 1114, the longitudinal grooves 132 and the through slots 131 into the channel 141, and further from the channel 141. Flow into the infusion tube and eventually into the patient.

When the syringe 50 is removed from the through hole 221, the support structure 32 of the elastic valve 30 is restored from the bent state to the upright state, and the head 311 of the valve plug 31 of the elastic valve 30 is similarly bent. The state is restored to an upright state. The outer surface of the base portion 312 of the valve plug 31 of the elastic valve 30 is again abutted against the inner side surface of the shoulder portion 23, and the head portion 311 is again located in the through hole 221. Thereby, the valve plug 31 of the elastic valve 30 closes the through hole 221, so that the through hole 221 is no longer connected to the accommodating space 24. What is important is that, in this embodiment, since the head 311 of the valve plug 31 does not have the eccentric longitudinal groove, the medicament or blood returned in the counterflow does not have local medicament or blood flowing into the eccentric longitudinal groove, so that the flow is reversed. All impact forces of the medicament or blood are concentrated on the wall of the recessed hole 3121. Thereby, the outer surface of the base portion 312 of the valve plug 31 of the present embodiment and the inner side surface of the shoulder portion 23 of the cover body 20 are tighter than those of the first embodiment, and the medicament or blood that is prevented from flowing back is prevented from passing therethrough. The effect of the hole 221 being ejected is better.

Referring to FIG. 12 to FIG. 15, FIG. 12 is an exploded perspective view of a third embodiment of the present invention, FIG. 13 is another exploded perspective view of the third embodiment of the present invention, and FIG. 14 is a third embodiment of the present invention. A line AA of Fig. 1 is a cross-sectional view of a corresponding position, and Fig. 15 is a cross-sectional view of the third embodiment of the present invention taken along line BB of Fig. 1. The third embodiment of the present invention is substantially the same as the foregoing second embodiment, except that the head portion 311 of the valve plug 31 has only the first sealing portion 3111 and does not have the second sealing portion. It is the same as the second embodiment in use, so it is not mentioned here.

The effects that can be achieved by the present invention are:

1. The present invention is based on the support structure 32 of the elastic valve 30 extending from the bottom end side of the base portion 312 of the valve plug 31 of the elastic valve 30 on one side of the axis 314 of the valve plug 31, and the support structure 32 The fixed section 323 is inserted into the slot 15. Therefore, when the elastic valve 30 is deformed, the fixing portion 323 of the supporting structure 32 of the elastic valve 30 is restricted by the slot 15, so that the extending portion 322 of the supporting structure 32 of the elastic valve 30 can lean against the protruding portion. One of the segments 133 of the portion 13 causes the support structure 32 of the elastic valve 30 to be bent in place and provides sufficient liquid flow space (i.e., the slot 33) for the medicament to circulate, so that the medicament is in the unit The flow rate through the elastic valve 30 is not reduced during the time, and the speed of all the medicaments entering the patient is more stable and the time is shortened, and there is no blocking feeling at all.

2. The passage 141 linearly penetrates the bottom surface of the duct 14 and the recess 111, and the valve plug 31 is coaxial with the passage 141. Thereby, the impact force of the counter-current medicament or blood directly hits the bottom of the base 312 of the valve plug 31, so that the outer surface of the base 312 of the valve plug 31 is lifted upward by a force, and the shoulder 23 is The inner side is clamped to lift the effect that the valve plug 31 seals the cover 20.

3. The bottom of the base portion 312 of the valve plug 31 of the elastic valve 30 forms the recessed hole 3121, and the recessed hole 3121 faces the passage 141. Thereby, the recessed hole 3121 can concentrate the impact force of the counter-flowing medicament or blood, so that the outer surface of the base portion 312 of the valve plug 31 obtains a large force, and the inner side of the shoulder portion 23 is stuck. More tightly, the effect of sealing the valve plug 31 to the cover 20 is better. In particular, when the wall surface of the recessed hole 3121. is a curved surface, the effect of concentrating the force is better, and the outer surface of the base portion 312 of the valve plug 31 obtains more force, and the inner side of the shoulder portion 23 is engaged with the inner side of the shoulder portion 23. A little tighter, the effect of sealing the valve plug 31 to the cover 20 is even better. If the arc center of the recessed hole 3121 is located on the axis 314 of the valve plug 31, the recessed hole 3121 is located at the center of the bottom of the base portion 312 of the valve plug 31, and the effect of the concentrated force reaches a higher level. The outer surface of the base portion 312 of the valve plug 31 obtains a greater force, and the inner side of the shoulder portion 23 is more tightly clamped, so that the valve plug 31 seals the cover body 20 better. status. It is to be noted that the protruding portion 13 is annular around the opening of the channel 14 on the side of the groove 111, and surrounds the through slot 131, and the through slot 131 communicates with the channel 14 Between the slot 33 and the slot 33. Thereby, the protruding portion 13 has the effect of guiding the backflowing medicine or blood concentrated toward the concave hole 3121, maximizing the effect of the concentrated force, and maximizing the outer surface of the base portion 312 of the valve plug 31. The card is tightly sealed to the inner side of the shoulder 23, and the effect of the valve plug 31 sealing the cover 20 is optimal.

4. The inner side surface of the connecting portion 321 of the supporting structure 32 of the elastic valve 30 forms the concave arc portion 3211, and the concave arc portion 3211 is connected to the wall surface of the recessed hole 3121. The curvature of the concave arc portion 3211 is The curvature of the wall surface of the recessed hole 3121 is equal. Thereby, the connecting section 321 of the support structure 32 of the elastic valve 30 is relatively easy to bend inward and downward.

5. When the outer side of the connecting portion 321 of the support structure 32 of the elastic valve 30 forms the convex portion 3212, the convex portion 3212 is connected to the outer side surface of the base portion 312, and the curvature of the convex portion 3212 and the base portion When the curvature of the spherical surface of the outer side surface of 312 is equal, the connecting section 321 of the support structure 32 of the elastic valve 30 can maintain a certain thickness. Thereby, the connecting section 321 of the support structure 32 of the elastic valve 30 maintains a certain elasticity when bent, and is not easily broken.

6. The fixing section 323 of the support structure 32 of the elastic valve 30 is slightly inclined with respect to the extending section 322, and the inclination thereof is inclined to the inclination of the outer side surface of the sector block 133 of the protruding portion 13 with respect to the bottom of the groove 111. And the extending direction of the extending portion 322 is parallel to the axis 314 of the valve plug 31, and is combined with the foregoing fourth and fifth technical features. Thereby, the support structure 32 of the elastic valve 30 has an arcuate shape, and thus has a back pressure angle, so that the elastic valve 30 can quickly return from the deformed state to the upright state, and facilitates the anti-bow shape to support the elastic valve 30. The valve plug 31 is configured such that the head 311 of the valve plug 31 abuts against the wall surface of the through hole 221 and the outer surface of the base portion 312 of the valve plug 31 closely abuts against the inner side surface of the shoulder portion 23 .

7. When the outer surface of the base portion 312 of the valve plug 31 of the elastic valve 30 is a spherical surface or a tapered surface, the outer surface of the base portion 312 has a larger area that abuts against the inner side surface of the shoulder portion 23. Thereby, the base 312 has a better effect of sealing the cover 20. In particular, when the inner side surface of the shoulder portion 23 is also curved, the base portion 312 is more effective in sealing the lid body 20.

8. The protruding portion 13 defines four longitudinal slots 132 , and the longitudinal slots 132 communicate with the through slots 131 . Thereby, the medicament in the accommodating space 24 can enter not only the slot 131 of the protruding portion 13 from the slot 33 of the elastic valve 30, but also the slot 131 from the longitudinal slot 132 to lift the medicament. Enter the speed of the slot 131.

9. When the elastic valve 30 is deformed, the bottom of the fixing portion 323 of the support structure 32 is upwardly bent so as to create a gap with the bottom surface of the groove, and the medicament remaining in the gap can follow the The oblique groove 1114 flows into the channel. Thereby, when the fixing portion 323 of the supporting structure 32 of the elastic valve 30 is reset downwardly against the bottom surface of the groove 111, no chemical remains in the fixing portion 323 of the supporting structure 32 of the elastic valve 30. At the bottom, the needle-free dosing device of this creation is contaminated with residual chemicals.

10. In the first embodiment, the axis 3131 of the eccentric longitudinal groove 313 inside the valve plug 31 of the elastic valve 30 and the support structure 32 are located on the same side of the axis 314 of the valve plug 31. Thereby, when the elastic valve 30 is deformed, the thinner side of the wall surface of the head 311 of the valve plug 31 is ensured to be bent inward, and the thicker side of the wall is bent outward and abuts against the shoulder. The inner side of the 23, and the first sealing portion 3111 of the head 311 of the valve plug 31 is inclined at an angle of 45 degrees with respect to the axis of the cover 20, so as to provide a large space for the medicament to flow into the accommodating space 24. Moreover, it is also ensured that the head portion 311 of the valve plug 31 can enter the through hole 221 accurately and quickly when the elastic valve 30 is restored to the upright shape.

11. In the second and third embodiments, the outer surface of the head portion 311 of the valve plug 31 forms the notch 3112, and the notch 3112 and the support structure 32 are located on the same side of the axis 314 of the valve plug 31. Thereby, the second embodiment can achieve the aforementioned ninth effect under the technical feature without the eccentric longitudinal groove 313, and the base portion 312 of the valve plug 31 when the elastic valve 30 is restored to the upright shape. The outer surface and the inner side surface of the shoulder portion 23 of the lid body 20 are tighter than those of the first embodiment, and the effect of preventing the backflowing medicament or blood from being ejected from the through hole 221 is better than that of the first embodiment.

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

10‧‧‧ Pedestal
11‧‧‧ First end
111‧‧‧ Groove
1111‧‧‧ Large diameter section
1112‧‧‧Small path
1113‧‧‧ Shoulder
1114‧‧‧ oblique groove
112‧‧‧First joint
12‧‧‧ second end
121‧‧‧ screw holes
13‧‧‧Protruding
131‧‧‧through slot
132‧‧‧Longitudinal slot
133‧‧‧ sector block
14‧‧‧ catheter
141‧‧‧ channel
1411‧‧‧ axis
15‧‧‧Slot
20‧‧‧ cover
21‧‧‧ Large diameter section
211‧‧‧Second joint
22‧‧‧Small path
221‧‧‧through holes
23‧‧‧ Shoulder
24‧‧‧ accommodating space
30‧‧‧Elastic valve
31‧‧‧ Valve plug
311‧‧‧ head
3111‧‧‧First closure
3112‧‧‧ gap
3113‧‧‧ Second sealing department
312‧‧‧ base
3121‧‧‧ recessed hole
313‧‧‧Eccentric longitudinal groove
3131‧‧‧ axis
314‧‧‧ axis
32‧‧‧Support structure
321‧‧‧Links
3211‧‧‧ concave arc
3212‧‧‧ convex arc
322‧‧‧Extension
323‧‧‧fixed section
33‧‧‧ slotting
40‧‧‧ margin space
50‧‧‧Syringe

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a first embodiment of the present invention. Figure 2 is an exploded view of the first embodiment of the present invention. Figure 3 is another angular exploded view of the first embodiment of the present invention. Figure 4 is a cross-sectional view of the first embodiment of the present invention taken along line A-A of Figure 1. Figure 5 is a cross-sectional view of the first embodiment of the present invention taken along line B-B of Figure 1. Figure 6 is a schematic view showing the elastic valve of the first embodiment of the present invention being pressed and deformed by a syringe. Figure 7 is an exploded view of a second embodiment of the present invention. Figure 8 is another perspective exploded view of a second embodiment of the present invention. Figure 9 is a cross-sectional view showing a corresponding position taken along line A-A of Figure 1 of the second embodiment of the present invention. Figure 10 is a cross-sectional view of the second embodiment of the present invention taken along line B-B of Figure 1 at a corresponding position. Figure 11 is a schematic view showing the elastic valve of the second embodiment of the present invention being pressed and deformed by a syringe. Figure 12 is an exploded view of a third embodiment of the present invention. Figure 13 is another perspective exploded view of a third embodiment of the present invention. Figure 14 is a cross-sectional view showing a corresponding position taken along line A-A of Figure 1 of the third embodiment of the present invention. Figure 15 is a cross-sectional view showing a corresponding position taken along line B-B of Figure 1 in a third embodiment of the present invention.

1114‧‧‧ oblique groove

131‧‧‧through slot

133‧‧‧ sector block

141‧‧‧ channel

21‧‧‧ Large diameter section

221‧‧‧through holes

23‧‧‧ Shoulder

24‧‧‧ accommodating space

31‧‧‧ Valve plug

311‧‧‧ head

312‧‧‧ base

3121‧‧‧ recessed hole

313‧‧‧Eccentric longitudinal groove

3211‧‧‧ concave arc

322‧‧‧Extension

323‧‧‧fixed section

33‧‧‧ slotting

40‧‧‧ margin space

50‧‧‧Syringe

Claims (10)

A needleless dosing device comprising: a base comprising a first end portion, a second end portion, a protruding portion and a conduit, the first end portion forming a groove, the protruding portion protruding Forming a slot between the bottom surface of the recess and the side wall of the recess, the duct is disposed at the second end portion, and forms a passage that linearly penetrates the bottom surface of the duct and the recess; a cover body comprising a large diameter section, a small diameter section and a shoulder portion, the large diameter section being disposed at the first end of the base, the small diameter section enclosing a consistent hole, the shoulder being disposed at the large Between the small diameter segments, the large diameter segment and the shoulder portion together define an accommodating space, the groove is communicated between the accommodating space and the channel; and an elastic valve includes a valve plug and a support The valve plug is coaxial with the passage. The valve plug includes a head portion and a base portion. The head portion is disposed at the through hole, and an outer surface of the base portion abuts against an inner wall surface of the shoulder portion to allow the receiving space Not communicating with the through hole, the support structure extends from one side of the base and is located at one side of the axis of the valve plug, and is inserted into the slot, the support The outer side surface of the structure and the inner side surface of the large diameter section of the cover body are spaced apart to define a margin space, and the inner side surface of the support structure and the bottom of the base portion of the valve plug respectively define a slot, the opening The slot is in communication with the accommodating space and the passage, wherein when the head of the valve plug of the elastic valve is pressed downward, the support structure is bent toward the margin space, and the head is separated from the through hole and enters the slot The accommodating space, the base of the valve plug of the elastic valve is separated from the shoulder, and the through hole communicates with the accommodating space, and the sluice is kept in communication with the accommodating space and the passage. The needleless applicator of claim 1, wherein the bottom of the base of the valve plug of the elastic valve forms a recessed hole, the recessed hole facing the passage. The needle-free dosing device of claim 2, wherein the concave surface of the concave hole is a curved surface. The needle-free dosing device of claim 3, wherein the inner side of the support structure of the elastic valve forms a concave arc portion, and the concave arc portion is connected to the concave surface of the concave hole and the concave arc portion The curvature is equal to the curvature of the wall of the recess. The needleless applicator according to any one of claims 1 to 4, wherein the outer surface of the base of the valve plug of the elastic valve is a spherical surface or a tapered surface. The needle-free dosing device of claim 1, wherein the protruding portion is annular around the opening of the channel on one side of the groove and is surrounded by a groove, the groove is connected Between the channel and the slot. The needle-free dosing device of claim 6, wherein the protruding portion defines at least one longitudinal groove, and the longitudinal groove communicates with the through groove. The needleless applicator of claim 7, wherein the bottom surface of the groove forms at least one oblique groove extending from the side wall of the groove toward the channel and extending through The bottom of the longitudinal slot is in communication with the passage. The needleless dosing device of claim 1, wherein the inside of the valve plug of the elastic valve forms an eccentric longitudinal groove, the eccentric longitudinal groove passes through the head and the base, and the axis of the eccentric longitudinal groove The support structure is located on the same side of the axis of the valve plug such that the wall surface of one side of the head of the valve plug is at a greater distance from the axis of the valve plug than the wall surface of the other side is from the axis of the valve plug. The needle-free dosing device of claim 1, wherein the outer surface of the head of the valve plug forms a notch, the notch and the supporting structure being located on the same side of the axis of the valve plug, so that the valve plug The wall of one side of the head is at a greater distance from the axis of the plug than the wall of the other side is from the axis of the plug.