A needle-free introduction device component with adjustable dosage

Abstract

The invention discloses a needle-free introduction instrument component with adjustable dosage, comprising an introduction instrument, a pressure applicator, and an ampoule. The introduction instrument comprises a stroke shell and an introduction shell, wherein the introduction shell is installed in a stroke inner cavity of the stroke shell; a stroke limit cylinder is fixed to one end of the stroke inner cavity away from the introduction shell, the interior of the introduction shell is an installation cavity, a guide cylinder is fixed in the installation cavity, a pressure guide hole and a switch guide groove are provided on the guide cylinder, the pressure guide hole is assembled with a pressure shaft, one end of the pressure shaft is installed in the pressure guide hole provided with the switch guide groove, a first pressure spring installation column is assembled and fixed to one end of the pressure spring, the other end of the pressure spring is assembled and fixed to the second pressure spring installation column, the second pressure spring installation column is fixed on the end face of the pressure ring close to the pressure spring; a switch plate is installed in the switch guide groove, and a pressure limit groove is provided on the side of the switch guide groove close to one end of the pressure shaft; the pressure limit head is assembled with the pressure limit groove; and the locking rod is installed in the stop groove.

Description

Technical Field

[0001] The invention relates to a needle-free introduction instrument, in particular to a needle-free introduction instrument component with adjustable dosage. Background Art

[0002] The needle-free introduction device is also called a needle-free syringe. It uses instantaneous pulse pressure to introduce drugs into the epidermis through the pores, so that the skin absorbs the drugs. The whole process does not require acupuncture, so it can reduce the pain of patients. In addition, since there is no needle puncture, the probability of cross infection is also greatly reduced. Currently, the needle-free introduction device has been widely used for human injection and animal injection.

[0003] The current needle-free introduction device generally cannot accurately control the dosage. It mainly infers the amount of medicine introduced by the reduction of the medicine in the ampoule after the medicine is inhaled. This method is more convenient in occasions where the dosage requirement is not high, but it is obviously not used in occasions where the dosage of the introduced medicine is required. Because the amount of medicine in the ampoule may be reduced or too little, the main reason is that the control of the medicine push rod stroke is not enough.

[0004] Therefore, the applicant proposes a dosage-adjustable needle-free introduction instrument assembly, which can control the introduced dosage by controlling the stroke of the medicine pushing rod, thereby avoiding excessive or insufficient introduction. Summary of the invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a needle-free introduction instrument component with adjustable dosage.

[0006] To achieve the above object, the present invention provides a dose-adjustable needle-free introduction instrument assembly, comprising an introduction instrument, a pressure applicator, and an ampoule, wherein the introduction instrument comprises a travel housing and an introduction housing, wherein the introduction housing is installed in a travel inner cavity of the travel housing, and the outer wall of the introduction housing is screwed together with the inner wall of the travel housing by means of a thread;

[0007] A travel limit cylinder is fixed to the end of the stroke inner cavity away from the introduction shell, the interior of the introduction shell is a mounting cavity, a guide cylinder is fixed in the mounting cavity, a pressure guide hole is provided on the end of the guide cylinder close to the stroke shell, a switch guide groove, a second through groove, and a stop groove are provided on the part away from the stroke shell, the pressure guide hole is assembled with the pressure shaft, one end of the pressure shaft is inserted into the pressure guide hole with the switch guide groove, and a first pressure spring mounting column is fixed on the end surface of this end, the first pressure spring mounting column is assembled and fixed with one end of the pressure spring, the other end of the pressure spring is assembled and fixed with the second pressure spring mounting column, and the second pressure spring mounting column is fixed on the end surface of the pressure ring close to the pressure spring;

[0008] A switch plate is installed in the switch guide groove, and a pressure limiting groove is arranged on the side of the switch guide groove close to one end of the pressure shaft. A release inclined surface is arranged at one end of the switch plate, and the other end passes through the switch guide groove and is assembled and fixed with the switch ring; the pressure limiting head is assembled with the pressure limiting groove;

[0009] The pressure ring is also provided with a pressure locking hole and a pressure fixing hole, a pressure fixing block is installed in the pressure locking hole, and the pressure screw passes through the pressure fixing hole and is assembled and fixed with the pressure fixing block;

[0010] The side surface of the pressure fixing block is assembled and fixed with one end of the locking spring, the other end of the locking spring is assembled and fixed with one end of the locking rod installed in the pressure locking hole, and the other end of the locking rod is installed in the back-stop groove.

[0011] Preferably, the stroke limiting cylinder is hollow inside, and an ampoule mounting cylinder is fixed to the inner side of one end of the stroke limiting cylinder away from the introduction shell, and the inner wall of the ampoule mounting cylinder is screwed and assembled with the outer wall of the screw-on cylinder through a thread.

[0012] Preferably, a pressure fitting hole is provided at one end of the pressure shaft close to the stroke limiting cylinder.

[0013] Preferably, a matching pressure hole is provided on the end surface of the pressure ring away from the pressure spring.

[0014] Preferably, the pressure limiting groove comprises a pressure limiting surface perpendicular to the axis line of the pressure shaft and a pressure introduction inclined surface inclined to the axis line of the pressure shaft;

[0015] The side surface of the pressure limiting head is in close contact with the pressure limiting surface, and the pressure limiting head is installed in the pressure mounting hole, and the pressure mounting hole is arranged on the pressure shaft;

[0016] A first limit mounting column is provided on one end of the pressure limit head that is inserted into the pressure mounting hole. The first limit mounting column is assembled and fixed to one end of the limit spring. The other end of the limit spring is assembled and fixed to the second limit mounting column. The second limit mounting column is fixed to the limit connecting block. The limit screw passes through the limit fixing screw hole set on the pressure shaft and is assembled and fixed to the limit connecting block.

[0017] Preferably, the anti-retreat groove includes an anti-retreat locking surface and an anti-retreat introduction surface, the anti-retreat locking surface is parallel to the axis of the locking rod, and the anti-retreat introduction surface is inclined from the outside to the inside and toward the pressure axis.

[0018] Preferably, the ampoule comprises a drug storage cylinder, wherein the interior of the drug storage cylinder is a drug storage inner cylinder, and one end of the drug storage inner cylinder is sealed and assembled with a piston, and the piston is assembled and fixed with one end of a drug pushing rod;

[0019] The two ends of the drug storage barrel are respectively provided with a first limiting end and a second limiting end, and a screw-on barrel is fixed on one end of the second limiting end away from the drug storage barrel, and the screw-on barrel is screwed and fixed to the inner side of the ampoule installation barrel by screwing;

[0020] The other end of the medicine pushing rod passes through the second limiting end and the screw-on cylinder 470 and is then inserted into the press-fit hole and is in close contact with the end surface of the press-fit hole;

[0021] An introduction protrusion is fixed on the outer side of the first limiting end. The introduction protrusion is hollow inside and is connected with the medicine storage inner cylinder through a connecting hole arranged on the first limiting end.

[0022] Preferably, a switch spring is sleeved on the switch plate between the locking rod and the switch ring, and the switch spring is used to generate an elastic force for the switch ring to move away from the pressure ring.

[0023] Preferably, a pressure ring is provided on one end of the introduction housing close to the switch ring; the pressure applicator comprises a pressure base, a pressure connecting plate, a first pressure plate, and a second pressure plate, and the pressure base is provided with a placement groove, a pressure partition plate, and a base hinge plate;

[0024] One end of the pressure connection plate is inserted between the two base hinge plates, and the first rotating shaft passes through the pressure connection plate and the two base hinge plates, and the two ends are respectively assembled and fixed to the two base hinge plates;

[0025] One end of the first pressure plate is provided with two first pressure hinge plates, and the other end is provided with two second pressure hinge plates. The other end of the pressure connecting plate is installed between the two first pressure hinge plates. The second rotating shaft passes through the two first pressure hinge plates and the pressure connecting plate, and the two ends are respectively assembled and fixed with the two first pressure hinge plates.

[0026] A pressure shaft block is also installed between the two first pressure hinge plates. After the third shaft passes through the pressure shaft block, both ends are respectively assembled with the two first pressure hinge plates; the pressure shaft block is assembled and fixed with one end of the pressure push rod, and the other end of the pressure push rod is an open end.

[0027] Preferably, a third pressure hinge plate is provided on the second pressure plate, the third pressure hinge plate is installed between the two second pressure hinge plates, the third rotating shaft passes through the third pressure hinge plate, and both ends are respectively assembled with the second pressure hinge plates.

[0028] Preferably, it also includes an extended base, the pressure base is provided with a placement groove, one end of which is inserted into the extended groove of the extended base, and a limited pressure plate is fixed to one end of the extended groove away from the placement groove;

[0029] The outer side of the pressure partition is assembled and fixed with the positioning fixing plate, the positioning fixing plate is assembled and fixed with one end of the positioning screw, and the other end of the positioning screw is installed in the second screw-in sleeve of the second pull rope knob and is screwed and assembled with it through a thread;

[0030] The second rotary sleeve is assembled and fixed to one end of the pull rope, and the other end of the pull rope is assembled and fixed to the tightening stud and wrapped around the tightening stud. One end of the tightening stud is fixed to the side of the extended base, and the other end is assembled to the inside of the first rotary sleeve through a threaded screw. The end face of the first rotary sleeve is pressed tightly against the pull rope wrapped around the tightening stud; the first rotary sleeve is arranged on the first pull rope knob.

[0031] Preferably, the drawstring is a soft nylon rope.

[0032] The beneficial effects of the present invention are as follows: the present invention adjusts the stroke of the medicine pushing rod by adjusting the assembly of the stroke housing and the introduction housing, thereby achieving the purpose of controlling the amount of medicine introduced, has a simple structure, and enables the operator to introduce a sufficient amount of medicine at one time, which can greatly improve efficiency and prevent overdose. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the introduction instrument.

[0034] Figure 2 yes Figure 1 Enlarged view of F1 in the middle.

[0035] Figure 3 yes Figure 1 Enlarged view of F2 in the middle.

[0036] Figure 4 It is a cross-sectional view of the pressure axis.

[0037] Figure 5 This is an exploded view of the parts of the pressure applicator.

[0038] Figure 6 This is an exploded view of the parts of the pressure applicator.

[0039] Figure 7 It is a structural schematic diagram of a pressure applicator.

[0040] Figure 8 It is a structural schematic diagram of a pressure applicator.

[0041] Fig. 9 It is a structural schematic diagram of a pressure applicator.

[0042] Fig.10 It is a structural schematic diagram of a pressure applicator.

[0043] Fig.11 It is a schematic diagram of the improved structure of the pressure applicator.

[0044] Fig.12 It is a schematic diagram of the improved structure of the pressure applicator.

[0045] Fig.13 It is a schematic diagram of the first pull rope knob, the second pull rope knob and the pull rope structure of the pressure applicator. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0047] See also Figure 1-Figure 4 A dose-adjustable needle-free introduction instrument assembly includes an introduction instrument, a pressure applicator, and an ampoule. The introduction instrument includes a stroke housing 110 and an introduction housing 210. The introduction housing 210 is installed in a stroke inner cavity 111 of the stroke housing 110, and the outer wall of the introduction housing 210 is screwed together with the inner wall of the stroke housing 110 by threads.

[0048] A travel limit cylinder 120 is fixed to the end of the travel inner cavity 111 away from the introduction shell 210. The travel limit cylinder 120 is hollow inside, and an ampoule installation cylinder 130 is fixed to the inner side of the end of the travel limit cylinder 120 away from the introduction shell 210. The inner wall of the ampoule installation cylinder 130 is screwed and assembled with the outer wall of the screw-on cylinder through a thread.

[0049] The interior of the introduction housing 210 is a mounting cavity 211, in which a guide cylinder 220 is fixed, and a pressure guide hole 222 is provided on the end of the guide cylinder 220 close to the stroke housing 110, and a switch guide groove 224, a second through groove 221, and a stop groove 226 are provided on the part away from the stroke housing 110. The pressure guide hole 222 is assembled with the pressure shaft 510, and the pressure shaft 510 can move in the axial direction of the pressure guide hole 222. The pressure shaft 510 is close to the stroke limit A pressure fitting hole 511 is provided at one end of the cylinder 120, one end of the pressure shaft 510 is inserted into the pressure guide hole 222 provided with the switch guide groove 224, and a first pressure spring mounting column 520 is fixed on the end surface of this end, the first pressure spring mounting column 520 is assembled and fixed with one end of the pressure spring 530, and the other end of the pressure spring 530 is assembled and fixed with the second pressure spring mounting column 550, and the second pressure spring mounting column 550 is fixed on the end surface of the pressure ring 540 close to the pressure spring 530;

[0050] A matching pressure hole 543 is provided on the end surface of the pressure ring 540 away from the pressure spring 530, a switch plate 720 is installed in the switch guide groove 224, and a pressure limiting groove 225 is provided on the side of the switch guide groove 224 close to one end of the pressure shaft 510, a release inclined surface 721 is provided at one end of the switch plate 720, and the other end passes through the switch guide groove 224 and is assembled and fixed with the switch ring 710;

[0051] The pressure limiting groove 225 includes a pressure limiting surface 2251 perpendicular to the axis of the pressure shaft 510 and a pressure introduction inclined surface 2252 inclined to the axis of the pressure shaft 510, and the pressure limiting groove 225 is assembled with the pressure limiting head 810, the side of the pressure limiting head 810 is tightly attached to the pressure limiting surface 2251, and the pressure limiting head 810 is installed in the pressure installation hole 513, and the pressure installation hole 513 is set on the pressure shaft 510;

[0052] A first limiting mounting column 811 is provided on one end of the pressure limiting head 810 that is inserted into the pressure mounting hole 513. The first limiting mounting column 811 is assembled and fixed to one end of the limiting spring 820. The other end of the limiting spring 820 is assembled and fixed to the second limiting mounting column 831. The second limiting mounting column 831 is fixed on the limiting connecting block 830. The limiting screw 320 passes through the limiting fixing screw hole 512 set on the pressure shaft 510 and is assembled and fixed to the limiting connecting block 830, thereby fixing the limiting connecting block 830 in the pressure mounting hole 513.

[0053] When in use, since the pressure limiting head 810 is in close contact with the pressure limiting surface 2251, the pressure limiting head 810 cannot pass through the pressure limiting surface 2251, but the pressure limiting head 810 can pass through the pressure introduction inclined surface 2252, so that the pressure limiting head 810 fixes the pressure shaft 510 in the axial direction, so that the pressure shaft 810 cannot move toward the ampoule in the axial direction;

[0054] When the release slope 721 moves toward the ampoule, the release slope 721 presses the pressure limit head 810 into the pressure mounting hole 513, so that the pressure limit head 810 completely enters the pressure mounting hole 513, thereby releasing the axial restriction on the pressure shaft. At this time, the pressure shaft applies axial pressure to the medicine pushing rod under the elastic force of the pressure spring.

[0055] The pressure ring 540 is also provided with a pressure locking hole 541 and a pressure fixing hole 542. A pressure fixing block 860 is installed in the pressure locking hole 541. The pressure screw 330 passes through the pressure fixing hole 542 and is assembled and fixed with the pressure fixing block 860, thereby fixing the pressure fixing block 860 in the pressure locking hole 541.

[0056] The side of the pressure fixing block 860 is assembled and fixed with one end of the locking spring 850, and the other end of the locking spring 850 is assembled and fixed with one end of the locking rod 840 inserted into the pressure locking hole 541, and the other end of the locking rod 840 is inserted into the backstop groove 226;

[0057] The stop groove 226 includes a stop locking surface 2262 and a stop introduction surface 2261. The stop locking surface 2262 is parallel to the axis of the locking rod 840, and the stop introduction surface 2261 is inclined from outside to inside toward the pressure shaft 510. Therefore, when the pressure ring 540 moves toward the pressure shaft 510, the stop introduction surface 2261 presses the locking rod 840 into the pressure locking hole 541, so that the pressure ring 540 moves in the axial direction to compress the pressure spring, but the pressure ring 540 cannot move in the reverse direction because the stop locking surface 2262 is in close contact with the side of the locking rod 840, so that the locking rod 840 cannot be compressed and retracted. This design can store the elastic force of the pressure spring.

[0058] Also included is an ampoule, which includes a drug storage cylinder 410, wherein the interior of the drug storage cylinder 410 is a drug storage inner cylinder 411, and one end of the drug storage inner cylinder 411 is sealed and assembled with a piston 440, and the piston 440 is assembled and fixed with one end of a drug pushing rod 450;

[0059] The two ends of the drug storage cartridge 410 are respectively provided with a first limiting end 420 and a second limiting end 460. A screw-on cylinder 470 is fixed to one end of the second limiting end 460 away from the drug storage cartridge 410. The screw-on cylinder 470 is screwed and fixed to the inner side of the ampoule mounting cylinder 130 by screwing. At this time, the second limiting end 460 is used to limit the maximum distance of the screw-on cylinder 470 into the ampoule mounting cylinder 130.

[0060] The other end of the medicine pushing rod 450 passes through the second limiting end 460 and the screwing cylinder 470 and is inserted into the press-fitting hole 511 and is tightly attached to the end surface of the press-fitting hole 511;

[0061] An introduction protrusion 430 is fixed on the outer side of the first limiting end 420 . The introduction protrusion 430 is hollow inside and is connected to the medicine storage inner cylinder 411 through a connecting hole 421 provided on the first limiting end 420 .

[0062] In the initial state, the pressure spring is not compressed, and the pressure ring 540 is located at the rightmost stop groove, and the switch plate 720 is located at the maximum displacement from the stroke housing 110.

[0063] When in use, firstly, pressure is applied to the pressure ring 540, so that the locking rod 840 is clamped with the stop groove close to the pressure spring. At this time, the pressure spring is compressed and stores elastic force.

[0064] Then, the introduction protrusion 430 of the ampoule is immersed in the medicine or nutrient solution to be introduced, and then the piston 440 is pulled to move toward the second limit end 460 by the medicine pushing rod until the medicine in the medicine storage inner cylinder 411 reaches the required amount, and then the screwing cylinder 470 is screwed into the ampoule mounting hole 114 through the thread until the medicine pushing rod 450 is installed in the pressure-fitting hole 511 and is tightly attached to the inner end surface of the pressure-fitting hole 511;

[0065] Finally, the introduction protrusion 430 is pressed tightly against the skin to be introduced, and the switch ring 710 is pushed toward the pressure shaft 510, so that the release slope 721 presses the pressure limit head 810 into the pressure limit hole 513, so that the pressure of the pressure spring is instantly released to the pressure shaft, and the pressure shaft transmits the pressure to the medicine pushing rod 450. Finally, the pressure of the pressure spring directly acts on the medicine in the medicine storage inner tube 411, and the medicine obtains instantaneous pulse pressure, and enters the pores and is introduced into the skin through this pressure.

[0066] When in use, the distance between the pressure shaft 510 and the travel limit cylinder 120 can be adjusted by rotating the travel housing 110, thereby adjusting the travel of the medicine pushing rod driven by the pressure shaft, and thus adjusting the amount of medicine introduced.

[0067] Scales can be set on the outer walls of the stroke housing 110 and the introduction housing 210 respectively. The distance between the pressure shaft 510 and the stroke limit cylinder 120 can be directly read through the scales, and the total amount of the introduced medicine can be calculated. The specific scale setting method can refer to the existing micrometer.

[0068] Preferably, the introduction housing 210 is provided with a first through slot 212 corresponding to the second through slot 221 , and the limiting pin 320 passes through the first through slot 212 and the second through slot 221 and is assembled and fixed with the switch plate 720 , thereby preventing the switch plate 720 from being pulled out of the switch guide slot 224 .

[0069] Preferably, a pressure ring 213 is provided on one end of the introduction housing 210 close to the switch ring 710, and the pressure ring 213 is used to fix the introduction housing 210 when a pressure applicator is used to apply pressure to the pressure ring.

[0070] Preferably, a switch spring 730 is sheathed on the switch plate 720 between the locking rod 840 and the switch ring 710, and the switch spring 730 is used to generate an elastic force to move the switch ring 710 away from the pressure ring, so that the switch plate can automatically reset after triggering the pressure limit head 810.

[0071] See also Figure 5-Figure 10 The pressure applicator includes a pressure base A100, a pressure connecting plate A200, a first pressure plate A300, and a second pressure plate A400. The pressure base A100 is provided with a placement groove A102, a pressure partition A110, and a base hinge plate A120;

[0072] One end of the pressure connection plate A200 is inserted between the two base hinge plates A120, and the first rotation axis A611 passes through the pressure connection plate A200 and the two base hinge plates A120, and the two ends are respectively assembled and fixed to the two base hinge plates A120, so that the pressure connection plate A200 can rotate relative to the pressure base A100 around the first rotation axis A611;

[0073] The first pressure plate A300 is provided with two first pressure hinged plates A310 at one end and two second pressure hinged plates A320 at the other end. The other end of the pressure connecting plate A200 is inserted between the two first pressure hinged plates A310. The second rotating shaft A612 passes through the two first pressure hinged plates A310 and the pressure connecting plate A200 and is respectively assembled and fixed with the two first pressure hinged plates A310 at both ends, so that the first pressure plate A300 can rotate relative to the pressure connecting plate A200 through the second rotating shaft A612.

[0074] A pressure shaft block A510 is also installed between the two first pressure hinge plates A310. After the third shaft A613 passes through the pressure shaft block A510, both ends are respectively assembled with the two first pressure hinge plates A310, so that the pressure shaft block A510 can rotate relative to the first pressure plate A300 around the third shaft A613;

[0075] The pressure shaft block A510 is assembled and fixed to one end of the pressure push rod A520, and the other end of the pressure push rod A520 is an open end;

[0076] The second pressure plate A400 is provided with a third pressure hinge plate A410, which is inserted between two second pressure hinge plates A320. The third rotating shaft A614 passes through the third pressure hinge plate A410 and is respectively assembled with the second pressure hinge plates A320 at both ends, so that the second pressure plate A400 can rotate relative to the first pressure plate A300 with the fourth rotating shaft A614 as the center.

[0077] In the initial state, the second pressure plate A400 is folded above the first pressure plate A300. This method can first increase the pressure applied to the pressure ring, and secondly, under the premise of applying the same pressure to the pressure spring, it will be more labor-saving to open the second pressure plate A400.

[0078] When in use, first place the introduction housing 210 in the placement groove A101, then place the pressure ring 213 close to one end of the travel housing 110 and the pressure partition A110 close to one end of the pressure connecting plate A200; then pass the pressure push rod A520 through the switch ring and assemble it with the matching pressure hole 543;

[0079] Finally, the first pressure plate A300 is rotated toward the pressure base A100 with the second rotating shaft as the center, so that the pressure push rod A520 pushes the pressure ring 540 to press the pressure spring until the stop groove and the locking rod 840 engage in the assembly interface;

[0080] See also Fig.10When the resistance is large when applying pressure through the first pressure plate A300, the second pressure plate can be rotated away from the first pressure plate A300 around the fourth axis A614, and then the first pressure plate A300 can be driven by the second pressure plate A400 to rotate toward the pressure base around the second axis to apply pressure.

[0081] See also Figure 11-13 Since the pressure spring is pressed only by clamping the pressure ring 213 and the pressure partition A110 to limit the movement of the introduction housing, a large stress concentration will be generated at the pressure ring 213, which makes the pressure ring 213 easy to be damaged. Therefore, the applicant makes the following improvements:

[0082] An extended base A710 is added, and the pressure base A100 is provided with a placement groove A101, one end of which is inserted into the extension groove A711 of the extended base A710, and a limited pressure plate A720 is fixed at one end of the extension groove A711 away from the placement groove A101;

[0083] The outer side of the pressure partition A110 is assembled and fixed with the positioning fixing plate A740, and the positioning fixing plate A740 is assembled and fixed with one end of the positioning screw A750. The other end of the positioning screw A750 is installed in the second screw-on sleeve A821 of the second pull rope knob A820 and is screwed and assembled with it through a thread.

[0084] The second rotating sleeve A821 is assembled and fixed to one end of the pull rope A910, and the other end of the pull rope A910 is assembled and fixed to the tensioning stud A730 and wrapped around the tensioning stud A730. One end of the tensioning stud A730 is fixed to the side of the extension base A710, and the other end is assembled with the inside of the first rotating sleeve A811 through a threaded screw. The end face of the first rotating sleeve A811 is pressed against the pull rope A910 wrapped around the tensioning stud A730; the first rotating sleeve A811 is arranged on the first pull rope knob A810.

[0085] When in use, clamp the limit pressure plate A720 and the end face of the travel housing 111 on which the ampoule is installed, and then clamp the pressure ring 213 and the pressure partition A110, and then apply pressure, which can greatly reduce the stress concentration at the pressure ring 213.

[0086] Considering that the distance between the stroke housing and the pressurizing ring 213 will change with the dosage of the medicine to be introduced, the relative position of the extension base A710 and the pressurizing base A100 also needs to be relatively changed. Therefore, the applicant adopts a method of connecting the extension base A710 and the positioning fixing plate A740 through a pull rope A910. When in use, the distance between the tensioning stud A730 and the positioning screw A750 can be adjusted by winding or releasing the pull rope on the tensioning stud A730, and the distance between the limiting pressure plate A720 and the pressure partition A110 can be adjusted, thereby achieving adaptation to different distances between the stroke housing and the pressurizing ring 213;

[0087] The second rotating sleeve A821 can also be rotated to wind the drawstring A910, which is used to fine-tune the length of the drawstring. The drawstring A910 is made of soft nylon.

[0088] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

[0089] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A dose-adjustable needle-free introduction device assembly, comprising: The introduction instrument, pressure applicator and ampoule are characterized in that: the introduction instrument comprises a travel shell and an introduction shell, and the introduction shell is installed in the travel inner cavity of the travel shell; A travel limit cylinder is fixed to the end of the stroke inner cavity away from the introduction shell, the interior of the introduction shell is a mounting cavity, a guide cylinder is fixed in the mounting cavity, a pressure guide hole is provided on the end of the guide cylinder close to the stroke shell, a switch guide groove, a second through groove, and a stop groove are provided on the part away from the stroke shell, the pressure guide hole is assembled with the pressure shaft, one end of the pressure shaft is inserted into the pressure guide hole with the switch guide groove, and a first pressure spring mounting column is fixed on the end surface of this end, the first pressure spring mounting column is assembled and fixed with one end of the pressure spring, the other end of the pressure spring is assembled and fixed with the second pressure spring mounting column, and the second pressure spring mounting column is fixed on the end surface of the pressure ring close to the pressure spring; A switch plate is installed in the switch guide groove, and a pressure limiting groove is arranged on the side of the switch guide groove close to one end of the pressure shaft. A release inclined surface is arranged at one end of the switch plate, and the other end passes through the switch guide groove and is assembled and fixed with the switch ring; the pressure limiting head is assembled with the pressure limiting groove; The pressure ring is also provided with a pressure locking hole and a pressure fixing hole, a pressure fixing block is installed in the pressure locking hole, and the pressure screw passes through the pressure fixing hole and is assembled and fixed with the pressure fixing block; The side surface of the pressure fixing block is assembled and fixed with one end of the locking spring, the other end of the locking spring is assembled and fixed with one end of the locking rod installed in the pressure locking hole, and the other end of the locking rod is installed in the backstop groove; The pressure limiting groove includes a pressure limiting surface perpendicular to the axis of the pressure shaft and a pressure introduction inclined surface inclined to the axis of the pressure shaft; The side surface of the pressure limiting head is in close contact with the pressure limiting surface, and the pressure limiting head is installed in the pressure mounting hole, and the pressure mounting hole is arranged on the pressure shaft; A first limit mounting column is arranged on one end of the pressure limit head which is inserted into the pressure mounting hole, the first limit mounting column is assembled and fixed with one end of the limit spring, the other end of the limit spring is assembled and fixed with the second limit mounting column, the second limit mounting column is fixed on the limit connecting block, and the limit screw passes through the limit fixing screw hole arranged on the pressure shaft and is assembled and fixed with the limit connecting block; The anti-retraction groove includes an anti-retraction locking surface and an anti-retraction introduction surface, the anti-retraction locking surface is parallel to the axis of the locking rod, and the anti-retraction introduction surface is inclined from the outside to the inside toward the pressure axis; A switch spring is sleeved on the switch plate between the locking rod and the switch ring, and the switch spring is used to generate an elastic force for the switch ring to move away from the pressure ring; A pressure ring is arranged on one end of the introduction housing close to the switch ring; the pressure applicator comprises a pressure base, a pressure connecting plate, a first pressure plate, and a second pressure plate, and the pressure base is provided with a placement groove, a pressure partition plate, and a base hinge plate; One end of the pressure connection plate is inserted between the two base hinge plates, and the first rotating shaft passes through the pressure connection plate and the two base hinge plates, and the two ends are respectively assembled and fixed to the two base hinge plates; One end of the first pressure plate is provided with two first pressure hinge plates, and the other end is provided with two second pressure hinge plates. The other end of the pressure connecting plate is installed between the two first pressure hinge plates. The second rotating shaft passes through the two first pressure hinge plates and the pressure connecting plate, and the two ends are respectively assembled and fixed with the two first pressure hinge plates. A pressure shaft block is also installed between the two first pressure hinge plates. After the third shaft passes through the pressure shaft block, both ends are respectively assembled with the two first pressure hinge plates; the pressure shaft block is assembled and fixed with one end of the pressure push rod, and the other end of the pressure push rod is an open end.

2. The adjustable dose needle-free introduction device assembly according to claim 1, characterized in that: The interior of the stroke limiting cylinder is hollow, and an ampoule mounting cylinder is fixed to the inner side of one end of the stroke limiting cylinder away from the introduction shell, and the inner wall of the ampoule mounting cylinder is screwed and assembled with the outer wall of the screwing cylinder through a thread.

3. The adjustable dose needle-free introduction device assembly according to claim 1, characterized in that: The pressure shaft is provided with a pressure fitting hole at one end close to the stroke limiting cylinder.

4. The adjustable dose needle-free introduction device assembly according to claim 1, characterized in that: A matching pressure hole is arranged on the end surface of the pressure ring away from the pressure spring.

5. The adjustable dose needle-free introduction device assembly according to claim 1, characterized in that: the ampoule, It includes a medicine storage cartridge, wherein the interior of the medicine storage cartridge is a medicine storage inner cartridge, and one end of the medicine storage inner cartridge is sealed and assembled with a piston, and the piston is assembled and fixed with one end of a medicine pushing rod; The two ends of the drug storage barrel are respectively provided with a first limiting end and a second limiting end, and a screw-on barrel is fixed on one end of the second limiting end away from the drug storage barrel, and the screw-on barrel is screwed and fixed to the inner side of the ampoule installation barrel by screwing; The other end of the medicine pushing rod passes through the second limiting end and the screw-on cylinder and is then inserted into the pressure-matching hole and is in close contact with the end surface of the pressure-matching hole; An introduction protrusion is fixed on the outer side of the first limiting end. The introduction protrusion is hollow inside and is connected with the medicine storage inner cylinder through a connecting hole arranged on the first limiting end.

6. The adjustable dose needle-free introduction device assembly according to claim 5, characterized in that: The second pressure plate is provided with a third pressure hinge plate, which is installed between two second pressure hinge plates. The third rotating shaft passes through the third pressure hinge plate, and both ends are respectively assembled with the second pressure hinge plates.

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