Quick insertion structure and needle-free pre-encapsulation emitter and pre-encapsulation medicine core connecting device

Abstract

The utility model relates to the technical field of medical instruments, and mainly discloses a quick insertion structure and a needle-free pre-encapsulation emitter and pre-encapsulation medicine core connecting device, the quick insertion structure comprises a guide ring, the guide ring can move along the axis of the guide ring, and the outer wall of the guide ring is provided with a clamping groove; the guide ring is sleeved with the center ring, a clamping through hole is formed in the side wall of the center ring, and a clamping piece is arranged in the clamping through hole; the central ring is sleeved with the lock sleeve, and a limiting groove is formed in the inner wall of the lock sleeve; the clamping groove and the limiting groove are located in the moving direction of the two sides of the clamping piece. An adapter is arranged at the transmitting end of the transmitter; the connecting shell comprises an outer shell, a lock sleeve, a center ring and a guide ring which are arranged in a layer-by-layer inward sleeving mode, and the adapter is inserted into the guide ring; the explosive charging pipe comprises an outer pipe and an explosive core fixed in the outer pipe, the explosive charging pipe is inserted into the center ring, and the problem that an existing connecting structure is inconvenient to disassemble and assemble is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical instrument especially, a kind of fast insertion structure and needle-free pre-filled launcher and pre-filled drug core connecting device. BACKGROUND

[0002] In the medical injection field, the traditional needle injection method has many drawbacks. Needle stick injury can easily cause occupational exposure of medical staff, increasing the risk of blood-borne disease infection. Patients' fear of needles often leads to poor injection compliance. Although pre-filled syringes optimize drug storage and injection processes to some extent, the needle design still cannot overcome the above problems.

[0003] Needle-free injection technology has emerged, which uses high-pressure airflow to push the drug through a small aperture to form a high-speed jet, achieving subcutaneous or intramuscular injection. However, existing needle-free injection devices have deficiencies in connecting with pre-filled drug cores, such as unreliable connection leading to drug leakage and complex operation affecting convenience. To solve these problems, researchers are committed to improving the connection technology between needle-free pre-filled launchers and pre-filled drug cores, focusing on how to achieve a stable, convenient, and well-sealed connection method to improve the safety and effectiveness of needle-free injection. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is the inconvenience of disassembly between the needle-free pre-filled launcher and the pre-filled drug core.

[0005] The above technical problem is solved by the following technical solution: the utility model provides a fast insertion structure, which includes a guide ring that can move along its axis and has a clamping groove on its outer wall, a center ring that is sleeved outside the guide ring and has a clamping hole in its side wall, a clamping piece inside the clamping hole, and a lock sleeve that is sleeved outside the center ring and has a limiting groove on its inner wall. The clamping groove and the limiting groove are located on both sides of the clamping piece in the moving direction.

[0006] In a preferred embodiment of the fast insertion structure of the utility model: the clamping groove is completely opened on the circumferential outer wall of the guide ring, or / and the clamping groove is circumferentially opened on the outer wall of the guide ring in several groups, and the distance between adjacent clamping grooves is equal.

[0007] In a preferred embodiment of the fast insertion structure of the utility model: the clamping groove has an asymmetric shape in axial cross-section; wherein the two ends of the clamping groove are barrier surfaces and release surfaces, and the clamping piece can move from the release surface to the outer wall of the guide ring along the groove bottom of the clamping groove.

[0008] In a preferred embodiment of the quick plug structure, the plurality of sets of the clamping perforations are circumferentially arranged on the outer wall of the center ring, and a part of the clamping member is always placed in the clamping perforation; when the clamping perforation corresponds to the clamping groove, the clamping member can be placed in the clamping perforation and the clamping groove at the same time; when the clamping perforation corresponds to the limiting groove, the clamping member can be placed in the clamping perforation and the limiting groove at the same time.

[0009] In a preferred embodiment of the quick plug structure, the limiting groove is completely arranged on the circumferential outer wall of the lock sleeve, or / and, a plurality of sets of the limiting grooves are circumferentially arranged on the outer wall of the lock sleeve, and the distance between adjacent limiting grooves is equal.

[0010] In a preferred embodiment of the quick plug structure, the limiting groove has a symmetrical shape in the axial cross section; wherein the two ends of the groove type cross section of the limiting groove are symmetrically distributed moving-out surfaces, and the clamping member can be moved from the two sides of the moving-out surfaces to the inner wall of the lock sleeve along the groove bottom of the limiting groove.

[0011] The above technical problems are also solved by the following technical scheme: a needle-free pre-filled launcher and pre-filled drug core connecting device, which is based on the above quick plug structure, comprising a launcher, the launcher is provided with an adapter at the emitting end; a connecting shell, the connecting shell comprises an outer shell, a lock sleeve, a center ring and a guide ring which are nested one inside another, the adapter is inserted into the guide ring; a charging pipe, the charging pipe comprises an outer pipe and a drug core fixed in the inner part thereof, and the charging pipe is inserted into the center ring.

[0012] In a preferred embodiment of the needle-free pre-filled launcher and pre-filled drug core connecting device, the adapter comprises a center connecting pipe, an inner push ring and an outer push ring which are sleeved on the outer wall of one end thereof, the inner push ring can be slidably inserted into the center ring, and the outer push ring can be slidably inserted into the outer shell; the end of the inner push ring and the outer push ring away from the launcher is respectively sleeved with a first spring and a second spring.

[0013] In a preferred embodiment of the needle-free pre-filled launcher and pre-filled drug core connecting device, the guide ring is slidably sleeved on the outer wall of the center connecting pipe, the two ends of the first spring are respectively in abutment with the guide ring and the inner push ring; the inner wall of the end of the guide ring away from the first spring is fixedly connected with an inner ring, and the end of the guide ring is also fixedly connected with a tapered ring.

[0014] In the preferred embodiment of the needle-free pre-filled launcher and pre-filled drug core connecting device, the center ring comprises a sliding sleeve and elastic clamps fixed at one end of the sliding sleeve, the elastic clamps are connected on the sliding sleeve in a circumferential distribution, and an adaptive gap is formed between adjacent elastic clamps; the elastic clamp comprises an elastic plate and a clamping block fixed at one end of the elastic plate, and the other end of the elastic plate is fixedly connected with the sliding sleeve; an inner groove is formed in the inner wall of the clamping block, and the inner grooves in the clamping block are circumferentially arranged to form a clamping groove, and the outer wall of the conical ring abuts against the inner wall of the clamping block.

[0015] In the preferred embodiment of the needle-free pre-filled launcher and pre-filled drug core connecting device, the lock sleeve is slidably connected outside the sliding sleeve, and the second spring abuts against the lock sleeve and the outer push ring at two ends; a pressure ring is fixedly connected to the inner wall of the end of the lock sleeve away from the second spring, and the outer wall of the clamping block abuts against the pressure ring.

[0016] In the preferred embodiment of the needle-free pre-filled launcher and pre-filled drug core connecting device, the outer tube is fixedly connected with an outer convex conical block at one end, the outer convex conical block can be clamped in the clamping groove, and the outer wall of the outer tube abuts against the inner wall of the conical ring; the drug core can be slidably inserted into the center connecting pipe.

[0017] The utility model discloses a beneficial effect lies in:

[0018] The utility model discloses the connecting shell is fixedly arranged at the launcher end part, and through the cartridge pipe insertion and clamping to the connecting shell, realizes the quick butt joint of launcher and cartridge pipe, in the operation process, need not consider the insertion angle of cartridge pipe, has reduced the installation difficulty, and the center ring and the guide ring cooperate with each other, and seal the drug core in the adapter, avoids the leakage of the liquid medicine.

[0019] And when need to detach the cartridge pipe that has emptied, just push the connecting shell in reverse, and the cartridge pipe can automatically pop out, can realize one -handed operation. ACCURACY OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be to the utility model embodiment of the drawings briefly introduced. Obviously, the drawings in the following description only relate to some embodiments of the utility model, and not limit the utility model. Among them:

[0021] Figure 1 The overall connection cross-sectional view of the quick insertion structure is shown;

[0022] Figure 2 The guide ring structure schematic diagram of the quick insertion structure is shown;

[0023] Figure 3 The center ring structure schematic diagram of the quick insertion structure is shown;

[0024] Figure 4 The schematic diagram of the lock sleeve structure of the quick insertion structure is shown.

[0025] Figure 5 The schematic diagram of the external structure of the needle-free pre-filled syringe and the pre-filled drug core connecting device is shown.

[0026] Figure 6 The overall sectional view of the needle-free pre-filled syringe and the pre-filled drug core connecting device is shown.

[0027] Figure 7 The connecting sectional view of the guide ring, the center ring, the lock sleeve and the adapter of the needle-free pre-filled syringe and the pre-filled drug core connecting device is shown.

[0028] Figure 8 The schematic diagram of the center ring structure of the needle-free pre-filled syringe and the pre-filled drug core connecting device is shown.

[0029] Figure 9 The sectional view of the center ring of the needle-free pre-filled syringe and the pre-filled drug core connecting device is shown.

[0030] Figure 10 The connection principle diagram of the needle-free pre-filled syringe and the pre-filled drug core connecting device is shown. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0032] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions regarding the present application, but the terms can be changed according to the intention of those skilled in the art, precedents or new technologies in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meanings thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as mere names, but based on the meanings of the terms and the overall description of the present application.

[0033] Referring to Figures 1-4 The present embodiment provides a quick insertion structure, which comprises a guide ring 100, the guide ring 100 is capable of moving along its axis, and a clamping groove A is formed in the outer wall of the guide ring 100.

[0034] A center ring 200 is sleeved on the outer wall of the guide ring 100, a clamping through hole B is formed in the side wall of the center ring 200, and a clamping piece C is arranged in the clamping through hole B.

[0035] The locking sleeve 300 is sleeved outside the center ring 200, and a limiting groove D is formed in the inner wall of the locking sleeve 300.

[0036] The card slot A and the limiting groove D are located on both sides of the card piece C in the moving direction, and in the action process, the card slot A can move towards the card piece C, and when the position of the card slot A corresponds to the card piece C, the card piece C can be simultaneously stored in the card slot A and the card joint perforation B.

[0037] As an optional embodiment, the card slot A is completely formed on the circumferential outer wall of the guide ring 100, or / and the card slot A is circumferentially formed in several groups on the outer wall of the guide ring 100, and the distance between adjacent card slots A is equal.

[0038] Referring to Figure 2 , if the card slot A is circumferentially formed on the outer wall of the guide ring 100, then after the guide ring 100 is connected with the center ring 200, the guide ring 100 cannot be circumferentially rotated, which has the advantages of being able to ensure that the guide ring 100 and the center ring 200 are in a stable state and preventing accidental rotation and causing liquid leakage, and the disadvantage is that higher installation accuracy is required.

[0039] The axial cross-sectional shape of the card slot A is asymmetric.

[0040] Specifically, referring to Figure 2 , the two ends of the slot type cross section of the card slot A are a blocking surface A1 and a release surface A2, and the card piece C can move from the release surface A2 to the outer wall of the guide ring 100 along the bottom of the card slot A.

[0041] Further, the blocking surface A1 plays a blocking role to block the card piece C from moving out from the left side of the card slot A, and the release surface A2 plays a guiding role to guide the card piece C to move from the card slot A to the outer wall of the guide ring 100.

[0042] Further, if the cross-sectional shape of the card slot A is a right trapezoid, then the release surface A2 is the hypotenuse of the right trapezoid, and at this time, the upper base of the right trapezoid, which is shorter, is the bottom of the card slot A.

[0043] If the cross-sectional shape of the card slot A is a quarter of a circle, then the release surface A2 is an arc surface of the entire quarter of a circle.

[0044] The card joint perforation B is circumferentially formed in several groups on the outer wall of the center ring 200, and the card piece C is always partially placed in the card joint perforation B.

[0045] When the card joint perforation B corresponds to the card slot A, the card piece C can be simultaneously placed in the card joint perforation B and the card slot A.

[0046] In the use process, the guide ring 100 is slidably inserted into the center ring 200, and the two are fixed by the card piece C.

[0047] When the clamping hole B corresponds to the limiting groove D, the clamping piece C can be placed in the clamping hole B and the limiting groove D at the same time.

[0048] In use, the lock sleeve 300 is sleeved on the outer wall of the center ring 200, and the two are clamped and fixed by the clamping piece C.

[0049] The limiting groove D is completely opened on the circumferential outer wall of the lock sleeve 300, or / and the limiting groove D is circumferentially opened in several groups on the outer wall of the lock sleeve 300, and the distance between adjacent limiting grooves D is equal.

[0050] Referring to the opening mode of the clamping groove A on the outer wall of the guide ring 100, if the lock sleeve 300 also adopts the distribution mode of circumferentially opening several groups, the number and position of openings need to correspond to the clamping groove A.

[0051] The limiting groove D is symmetrically shaped in axial section.

[0052] Among them, the groove type section of the limiting groove D is symmetrically distributed from both ends of the moving surface D1, and the clamping piece C can move from both sides of the moving surface D1 to the inner wall of the lock sleeve 300 along the groove bottom of the limiting groove D.

[0053] Further, the clamping piece C can be a spherical ball, or a regular slider with a hexagonal cross section.

[0054] Referring to Figure 3 , if the clamping piece C is a spherical ball, the clamping piece C can roll randomly in the rectangular or circular hole-shaped clamping hole B and move up and down in the clamping hole B during use.

[0055] If the clamping piece C is a regular slider with a hexagonal cross section, the clamping hole B is preferably a rectangular hole for matching use, so that the clamping piece C can slide up and down more stably in the clamping hole B.

[0056] Referring to 1, in use, the center ring 200 is stationary, the guide ring 100 slides inside the center ring 200, and the lock sleeve 300 slides outside the center ring 200, at this time the clamping piece C is located in the clamping hole B and the limiting groove D.

[0057] Further, at this time the lock sleeve 300 cannot move to the left and right, if you want to contact the locking state of the lock sleeve 300 and the center ring 200, you only need to push the guide ring 100 to the right, at this time the clamping groove A moves to the corresponding position of the clamping piece C, and then push the lock sleeve 300 to the left, the limiting groove D can push the clamping piece C to the clamping groove A, at this time the lock sleeve 300 can move randomly outside the center ring 200.

[0058] It should be noted that in the present scheme, only the card slot A is allowed to move from the card joint hole B to the left side of the card joint hole B, so the card C needs to be carded with the blocking surface A1 to block the guide ring 100.

[0059] Further, when the guide ring 100 and the center ring 200 are fixed with each other under the action of the card C, the lock sleeve 300 can be moved at will outside the center ring 200.

[0060] Referring to Figures 1-10 In order to better apply the above quick plug structure, the utility model provides the following technical scheme: a needle-free pre-filled launcher and pre-filled drug core connecting device based on the above quick plug structure, comprising a launcher 400, and the launcher 400 is provided with an adapter 401 at the launching end.

[0061] A connecting shell 500, the connecting shell 500 comprises a housing 501, a lock sleeve 300, a center ring 200 and a guide ring 100 which are nested one inside another, and the adapter 401 is inserted into the guide ring 100.

[0062] A charging pipe 600, the charging pipe 600 comprises an outer pipe 601 and a drug core 602 fixed inside the outer pipe 601, and the charging pipe 600 is inserted into the center ring 200.

[0063] In the use process, the charging pipe 600 is clamped and fixed through the connecting shell 500 and communicates with the launcher 400, at this time the launcher 400 works to eject the liquid medicine inside the drug core 602, after the drug core 602 is emptied, the housing 501 is slid to unlock the clamping and locking of the center ring 200 to the outer pipe 601, and the charging pipe 600 can be pushed out by the guide ring 100.

[0064] The adapter 401 comprises a center connecting pipe 401a and an inner push ring 401b and an outer push ring 401c fixedly sleeved on the outer wall of one end thereof, the inner push ring 401b can be slidably inserted into the center ring 200 in cooperation, and the outer push ring 401c can be slidably inserted into the housing 501 in cooperation.

[0065] The end of the inner push ring 401b and the outer push ring 401c away from the launcher 400 is respectively sleeved with a first spring T1 and a second spring T2.

[0066] Referring to Figure 7 The inner push ring 401b and the outer push ring 401c are fixedly sleeved on the center connecting pipe 401a in steps, a liquid passage is formed on the axis of the center connecting pipe 401a for the flow of liquid medicine.

[0067] The outer diameter of the inner push ring 401b is smaller than that of the outer push ring 401c, annular grooves are formed on the stepped surfaces of the ends of the inner push ring 401b and the outer push ring 401c close to the connecting shell 500, and the first spring T1 and the second spring T2 are respectively installed in the annular grooves.

[0068] The guide ring 100 is slidingly sleeved outside the center connecting pipe 401a, and the two ends of the first spring T1 are respectively in abutment with the guide ring 100 and the inner push ring 401b.

[0069] The inner chamber of the guide ring 100 is in flow communication with the liquid medicine in the center connecting pipe 401a, and the first spring T1 gives the guide ring 100 a leftward pushing force.

[0070] The inner wall of the end of the guide ring 100 away from the first spring T1 is fixedly connected with the inner ring 101, and the end of the guide ring 100 is also fixedly connected with the taper ring 102.

[0071] The inner diameter of the inner ring 101 is smaller than the inner diameter of the guide ring 100 and is the same as the inner diameter of the center connecting pipe 401a, so as to facilitate the butt joint of the inner ring 101 and the center connecting pipe 401a.

[0072] The center ring 200 comprises a sliding sleeve 201 and an elastic claw 202 fixed to one end of the sliding sleeve 201, the elastic claw 202 is circumferentially distributed and connected to the sliding sleeve 201, and an adaptive gap X is formed between adjacent elastic claws 202.

[0073] The elastic claw 202 comprises an elastic plate 202a and a clamping block 202b fixed to one end of the elastic plate 202a, and the other end of the elastic plate 202a is fixedly connected with the sliding sleeve 201.

[0074] Further, when the inner wall of the clamping block 202b is subjected to an outward expansion pushing force in the use process, the clamping block 202b can push the elastic plate 202a to be raised outward.

[0075] The inner wall of the clamping block 202b is provided with an inner groove 202b-1, and the inner grooves 202b-1 in the clamping block 202b are circumferentially arranged to form a clamping groove J, and the outer wall of the taper ring 102 is in abutment with the inner wall of the clamping block 202b.

[0076] Further, the inclined outer wall of the taper ring 102 is tightly combined with the right inner wall of the clamping block 202b.

[0077] The lock sleeve 300 is slidingly sleeved outside the sliding sleeve 201, and the two ends of the second spring T2 are respectively in abutment with the lock sleeve 300 and the outer push ring 401c.

[0078] The inner wall of the end of the lock sleeve 300 away from the second spring T2 is fixedly connected with a pressure ring 301, and the outer wall of the clamping block 202b is in abutment with the pressure ring 301.

[0079] The outer wall of one end of the outer pipe 601 is fixedly connected with an outer convex taper block 601a, the outer convex taper block 601a can be matched and clamped in the clamping groove J, and the outer wall of the outer pipe 601 is in abutment with the inner wall of the taper ring 102; the medicine core 602 can be slidingly inserted into the center connecting pipe 401a.

[0080] In summary, with reference toFigure 10 In use, the guide ring 100 and the lock sleeve 300 are located at the starting position under the pushing of the first spring T1 and the second spring T2, at which time the clamping piece C is partially located in the limiting groove D, the tapered ring 102 is inserted into the clamping groove J formed by the clamping block 202b, and the left end of the inner ring 101 abuts against the right end of the clamping block 202b.

[0081] Further, the charge pipe 600 is installed, the core 602 first enters the clamping groove J, then the outer convex tapered block 601a contacts the left end inner wall inclined surface of the clamping block 202b, and pushes the clamping block 202b around outward until the outer convex tapered block 601a is completely inserted into the clamping groove J, and the inner wall shape of the clamping groove J and the outer wall shape of the outer convex tapered block 601a are complementary and abut.

[0082] Further, since the charge pipe 600 applies a pushing force to the right, the tapered ring 102 is first pushed, the guide ring 100 is moved to the right, the first spring T1 is contracted, until the clamping groove A in the guide ring 100 reaches the corresponding position of the clamping perforation B, at which time the outer convex tapered block 601a is just completely wrapped and clamped by the clamping groove J and cannot move to the right any more.

[0083] Further, in the starting state, the second spring T2 gives a pushing force to the left to the lock sleeve 300, at which time the lock sleeve 300 moves to the left, moves out of the surface D1 and pushes the clamping piece C in the limiting groove D to the clamping groove A, and the limiting groove D is no longer blocked by the clamping piece C, the second spring T2 is reset and stretched to the left to push the lock sleeve 300 to the left, the inner wall of the lock sleeve 300 limits the clamping piece C in the clamping perforation B and the clamping groove A, the left end of the pressing ring 301 in the lock sleeve 300 abuts against the outer limiting ring arranged on the left end outer wall of the clamping block 202b, and at this time, the abutting outer limiting ring abuts against the inner wall of the outer shell 501.

[0084] In this state, the elastic plate 202a and the clamping block 202b cannot be opened outward, which means that the clamping groove J is always in the state of wrapping and clamping the outer convex tapered block 601a, and the connection between the charge pipe 600 and the center ring 200 is stable.

[0085] Further, if it is desired to unlock the charge pipe 600, the outer shell 501 is only needed to be pulled to the right, the outer shell 501 drives the lock sleeve 300 to move to the right until the limiting groove D on the lock sleeve 300 corresponds to the position of the clamping perforation B, at which time the first spring T1 in the compressed state releases the pressure, pushes the guide ring 100 to the left, and the clamping piece C originally located in the clamping groove A moves to the outside of the clamping groove A along the release surface A2, at which time the clamping piece C moves to the limiting groove D under the limiting action of the outer wall of the guide ring 100.

[0086] In this process, the shell 501 and the lock sleeve 300 move right, the clamping block 202b and the outer limiting ring arranged at the left end outer wall thereof abut against no longer being limited by the shell 501, and can expand outward, the guide ring 100 pushes the outer tube 601 left, and the outer convex conical block 601a is pushed out from the clamping groove J, at this time, the charging pipe 600 is popped out to the outside of the connecting shell 500 as a whole.

[0087] Finally, it should be pointed out that the above detailed description of the method and equipment is only an embodiment, and those skilled in the art can modify the embodiment in different ways without departing from the scope of the present application.

Claims

1. A quick-connect structure, characterized in that: include, A guide ring (100) is movable along its axis, and a groove (A) is provided on the outer wall of the guide ring (100); A central ring (200) is sleeved on the outside of a guide ring (100). A snap-fit ​​hole (B) is provided on the side wall of the central ring (200). A snap-fit ​​piece (C) is provided in the snap-fit ​​hole (B). A locking sleeve (300) is fitted onto the outside of a central ring (200), and a limiting groove (D) is formed on the inner wall of the locking sleeve (300); The card slot (A) and the limiting slot (D) are located on both sides of the card (C) in the moving direction.

2. The quick-connect structure according to claim 1, characterized in that: The slot (A) is fully formed on the circumferential outer wall of the guide ring (100), or / and, The slots (A) are arranged in a circumferential manner on the outer wall of the guide ring (100), and the distance between adjacent slots (A) is equal.

3. The quick-connect structure according to claim 1 or 2, characterized in that: The axial cross-sectional shape of the slot (A) is asymmetrical; The slot (A) has a groove-shaped cross-section with a blocking surface (A1) and a release surface (A2) at both ends, and the card (C) can move along the bottom of the slot (A) from the release surface (A2) to the outer wall of the guide ring (100).

4. The quick-connect structure according to claim 2, characterized in that: The snap-fit ​​holes (B) are provided in several groups circumferentially on the outer wall of the central ring (200), and the snap-fit ​​piece (C) is always partially placed in the snap-fit ​​holes (B); When the snap-fit ​​hole (B) corresponds to the card slot (A), the card (C) can be placed in both the snap-fit ​​hole (B) and the card slot (A) at the same time; When the snap-fit ​​hole (B) corresponds to the limiting groove (D), the snap-fit ​​piece (C) can be placed in both the snap-fit ​​hole (B) and the limiting groove (D) at the same time.

5. The quick-connect structure according to any one of claims 1, 2 and 4, characterized in that: The limiting groove (D) is completely formed on the outer circumferential wall of the locking sleeve (300), or / and, The limiting grooves (D) are provided in several groups circumferentially on the outer wall of the lock sleeve (300), and the distance between adjacent limiting grooves (D) is equal.

6. The quick-connect structure according to claim 5, characterized in that: The axial cross-sectional shape of the limiting groove (D) is symmetrical; The limiting groove (D) has symmetrically distributed exit surfaces (D1) at both ends of its groove cross-section, and the locking piece (C) can move along the bottom of the limiting groove (D) from both exit surfaces (D1) to the inner wall of the locking sleeve (300).

7. A needle-free pre-filled transmitter and a pre-filled drug core connection device, characterized in that: Based on the quick-connect structure as described in any one of claims 1 to 6, including, A transmitter (400) is provided with an adapter (401) at its transmitting end; A connecting shell (500) includes an outer shell (501), a locking sleeve (300), a central ring (200), and a guide ring (100) that are nested inwards in layers, and the adapter (401) is inserted into the guide ring (100); The drug loading tube (600) includes an outer tube (601) and a drug core (602) fixed inside it, and the drug loading tube (600) is inserted into a central ring (200).

8. The needle-free pre-filled emitter and pre-filled drug core connection device according to claim 7, characterized in that: The adapter (401) includes a central connecting pipe (401a) and an inner push ring (401b) and an outer push ring (401c) fixedly sleeved on the outer wall of one end. The inner push ring (401b) can be slidably inserted into the central ring (200), and the outer push ring (401c) can be slidably inserted into the outer shell (501). The inner push ring (401b) and the outer push ring (401c) are respectively fitted with a first spring (T1) and a second spring (T2) at the ends away from the transmitter (400).

9. The needleless pre-filled emitter and pre-filled drug core connection device according to claim 8, characterized in that: The guide ring (100) is slidably sleeved on the outside of the central connecting tube (401a), and the two ends of the first spring (T1) abut against the guide ring (100) and the inner push ring (401b) respectively. An inner ring (101) is fixedly connected to the inner wall of the end of the guide ring (100) away from the first spring (T1), and a conical ring (102) is also fixedly connected to this end of the guide ring (100).

10. The needleless pre-filled emitter and pre-filled drug core connection device according to claim 9, characterized in that: The central ring (200) includes a sliding sleeve (201) and an elastic claw (202) fixed at one end thereto. The elastic claws (202) are circumferentially distributed and connected to the sliding sleeve (201), and an adaptive gap (X) is formed between adjacent elastic claws (202). The elastic claw (202) includes an elastic plate (202a) and a clamping block (202b) fixed at one end thereto, and the other end of the elastic plate (202a) is fixedly connected to the sliding sleeve (201); The inner wall of the clamping block (202b) is provided with an inner groove (202b-1), and the inner grooves (202b-1) arranged in a circumferential direction are combined to form a clamping groove (J). The outer wall of the cone ring (102) abuts against the inner wall of the clamping block (202b).

11. The needleless pre-filled emitter and pre-filled drug core connection device according to claim 10, characterized in that: The locking sleeve (300) is slidably sleeved on the outside of the sliding sleeve (201), and the two ends of the second spring (T2) abut against the locking sleeve (300) and the outer push ring (401c) respectively; A pressure ring (301) is fixedly connected to the inner wall of the end of the lock sleeve (300) away from the second spring (T2), and the outer wall of the clamping block (202b) abuts against the pressure ring (301).

12. The needleless pre-filled emitter and pre-filled drug core connection device according to claim 7, 8 or 10, characterized in that: An externally protruding cone block (601a) is fixedly connected to the outer wall of one end of the outer tube (601). The externally protruding cone block (601a) can be engaged in the clamping groove (J), and the outer wall of the outer tube (601) abuts against the inner wall of the cone ring (102). The core (602) can be slidably inserted into the central connecting tube (401a).

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