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

Abstract

The invention 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 a clamping groove is formed in the outer wall of the guide ring; 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 charging pipe comprises an outer pipe and a medicine core fixed in the outer pipe, the 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 invention relates to the field of medical devices, in particular to a quick-insertion structure and a device for connecting a needle-free prefilled emitter and a prefilled medicine core. Background Art

[0002] In the field of medical injections, traditional needle injections have many drawbacks. Needlestick injuries can easily lead to occupational exposure of medical staff and increase the risk of blood-borne diseases; patients' fear of needles often leads to poor injection compliance. Although prefilled syringes have optimized the drug storage and injection process to a certain extent, the needle design still cannot overcome the above problems.

[0003] Needle-free injection technology came into being. It uses high-pressure airflow and other methods to push drugs through tiny apertures to form high-speed jets for subcutaneous or intramuscular injection. However, existing needle-free injection devices have shortcomings in connecting with prefilled drug cores. For example, unreliable connections can easily lead to drug leakage, and complex operations affect ease of use. To solve these problems, researchers are committed to improving the connection technology between needle-free prefilled launchers and prefilled drug cores. Related patent research and development focuses on how to achieve a stable, convenient and well-sealed connection method to improve the safety and effectiveness of needle-free injections. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that it is inconvenient to disassemble and assemble the needle-free prefilled emitter and the prefilled medicine core.

[0005] The above technical problems are solved by the following technical solutions: The present invention proposes a quick-insertion structure, which includes a guide ring, which can move along its axis and the outer wall of the guide ring is provided with a clamping groove; a center ring, which is sleeved on the outside of the guide ring, and the side wall of the center ring is provided with a clamping through hole, and a clamping piece is arranged in the clamping through hole, and a locking sleeve, which is sleeved on the outside of the center ring, and the inner wall of the locking sleeve is provided with a limiting groove; wherein the clamping groove and the limiting groove are located on both sides of the moving direction of the clamping piece.

[0006] In a preferred embodiment of the quick-insert structure of the present invention: the slots are completely formed on the circumferential outer wall of the guide ring, or / and a plurality of groups of slots are formed on the circumferential outer wall of the guide ring, and the distances between adjacent slots are equal.

[0007] In a preferred embodiment of the quick-insert structure of the present invention: the axial cross-sectional shape of the slot is asymmetric; wherein the two ends of the slot-shaped cross-sectional shape of the slot are blocking surfaces and release surfaces, and the clamping piece can move from the release surface to the outer wall of the guide ring along the bottom of the slot.

[0008] In a preferred embodiment of the quick-insertion structure of the present invention: the snap-in through holes are circumferentially opened in several groups on the outer wall of the center ring, and a portion of the snap-in piece is always placed in the snap-in through holes; when the snap-in through holes correspond to the slots, the snap-in piece can be placed in both the snap-in through holes and the slots at the same time; when the snap-in through holes correspond to the limiting grooves, the snap-in piece can be placed in both the snap-in through holes and the limiting grooves at the same time.

[0009] In a preferred embodiment of the quick-insertion structure of the present invention: the limiting grooves are completely formed on the circumferential outer wall of the lock sleeve, or / and a plurality of groups of limiting grooves are formed on the circumferential outer wall of the lock sleeve, and the distances between adjacent limiting grooves are equal.

[0010] In a preferred embodiment of the quick-insertion structure of the present invention: the axial cross-sectional shape of the limiting groove is a symmetrical shape; wherein, the two ends of the groove cross-sectional shape of the limiting groove are symmetrically distributed removal surfaces, and the clamping member can move from the removal surfaces on both sides along the bottom of the limiting groove to the inner wall of the locking sleeve.

[0011] The above technical problems are also solved by the following technical solutions: a needle-free prefilled launcher and prefilled medicine core connection device, which is based on the above-mentioned quick-insert structure, including a launcher, and the launch end of the launcher is provided with an adapter; a connecting shell, the connecting shell includes an outer shell, a locking sleeve, a center ring and a guide ring which are layered and sleeved inwardly, and the adapter is inserted into the guide ring; a medicine charging tube, the medicine charging tube includes an outer tube and a medicine core fixed therein, and the medicine charging tube is inserted into the center ring.

[0012] In a preferred embodiment of the device for connecting a needle-free prefilled launcher and a prefilled medicine core of the present invention: the adapter includes a central connecting tube and an inner push ring and an outer push ring fixedly sleeved on the outer wall of one end thereof, the inner push ring can be slidably inserted into the central ring, and the outer push ring can be slidably inserted into the outer shell; the ends of the inner push ring and the outer push ring away from the launcher are respectively sleeved with a first spring and a second spring.

[0013] In a preferred embodiment of the device for connecting a needle-free prefilled launcher and a prefilled medicine core of the present invention: the guide ring is slidably sleeved on the outside of the central connecting tube, and the two ends of the first spring are respectively abutted against the guide ring and the inner push ring; the inner wall of one end of the guide ring away from the first spring is fixedly connected with an inner ring, and this end of the guide ring is also fixedly connected with a cone ring.

[0014] In a preferred embodiment of the device for connecting a needle-free prefilled launcher and a prefilled medicine core of the present invention: the center ring includes a sliding sleeve and an elastic claw fixed at one end thereof, the elastic claws are circumferentially distributed and connected to the sliding sleeve, and an adaptation gap is formed between adjacent elastic claws; the elastic claws include an elastic plate and a clamping block fixed at one end thereof, the other end of the elastic plate is fixedly connected to the sliding sleeve; an inner groove is provided on the inner wall of the clamping block, and the inner grooves arranged circumferentially in the clamping block are combined to form a clamping groove, and the outer wall of the cone ring abuts against the inner wall of the clamping block.

[0015] In a preferred embodiment of the device for connecting a needle-free prefilled launcher and a prefilled medicine core of the present invention: the locking sleeve is slidably sleeved on the outside of the sliding sleeve, and the two ends of the second spring are respectively abutted against the locking sleeve and the outer push ring; a pressure ring is fixedly connected to the inner wall of one end of the locking sleeve away from the second spring, and the outer wall of the clamping block is abutted against the pressure ring.

[0016] In a preferred embodiment of the device for connecting a needle-free prefilled launcher and a prefilled medicine core of the present invention: an outer wall at one end of the outer tube is fixedly connected with an outer convex cone block, the outer convex cone block can be fitted and snapped into the clamping groove, and the outer wall of the outer tube abuts against the inner wall of the cone ring; the medicine core can be fitted and slidably inserted into the central connecting tube.

[0017] The beneficial effects of the present invention are:

[0018] The present invention fixes the connection shell at the end of the launcher, and plugs and snaps the charge tube into the connection shell to achieve rapid docking of the launcher and the charge tube. During operation, there is no need to consider the insertion angle of the charge tube, which reduces the difficulty of installation. The center ring and the guide ring cooperate with each other to seal the drug core in the adapter, thereby avoiding leakage of the drug solution.

[0019] And when it is necessary to remove the emptied charging tube, just push the connecting shell backwards and the charging tube will pop out automatically, which can be operated with one hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention. Among them:

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

[0022] Figure 2 A schematic diagram of the guide ring structure of the quick-insert structure is shown;

[0023] Figure 3 A schematic diagram of the central ring structure of the quick-insert structure is shown;

[0024] Figure 4 A schematic diagram of the lock sleeve structure of the quick-insert structure is shown;

[0025] Figure 5 A schematic diagram of the external structure of the needle-free prefilled emitter and the prefilled medicine core connection device is shown;

[0026] Figure 6 An overall cross-sectional view of a needle-free prefilled transmitter and a prefilled drug core connection device is shown;

[0027] Figure 7 A cross-sectional view showing the connection between the guide ring, center ring, locking sleeve and adapter of the needle-free prefilled transmitter and the prefilled medicine core connection device;

[0028] Figure 8 A schematic diagram of the central ring structure of the needle-free prefilled emitter and the prefilled medicine core connection device is shown;

[0029] Fig. 9 A center ring cross-sectional view of a needle-free prefilled transmitter and a prefilled drug core connection device is shown;

[0030] Fig.10 The figure shows the connection principle diagram of the needle-free prefilled transmitter and the prefilled medicine core connection device. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation methods and drawings.

[0032] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present invention.

[0033] Reference Figure 1 to Figure 4 The present embodiment provides a quick-insertion structure, which includes a guide ring 100. The guide ring 100 can move along its axis, and a slot A is provided on the outer wall of the guide ring 100.

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

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

[0036] Among them, the card slot A and the limit slot D are located on both sides of the moving direction of the card C. During the action, the card slot A can move toward the card C. When the position of the card slot A corresponds to the card C, the card C will be stored in the card slot A and the card connection through hole B at the same time.

[0037] As an optional embodiment, the card slots A are completely opened on the circumferential outer wall of the guide ring 100, or / and a plurality of groups of card slots A are opened circumferentially on the outer wall of the guide ring 100, and the distances between adjacent card slots A are equal.

[0038] Reference Figure 2 If the slot A is circumferentially opened on the outer wall of the guide ring 100, then after the guide ring 100 is connected to the center ring 200, it cannot rotate circumferentially. The advantage is that it can ensure that the guide ring 100 and the center ring 200 are in a stable state to prevent arbitrary rotation and cause leakage of the liquid medicine; the disadvantage is that it requires higher installation accuracy.

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

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

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

[0042] Furthermore, if the cross-sectional shape of the slot A is a right-angled trapezoid, then the release surface A2 is the hypotenuse of the right-angled trapezoid, and the shorter upper base of the right-angled trapezoid is the bottom of the slot A.

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

[0044] A plurality of groups of clamping through holes B are circumferentially opened on the outer wall of the center ring 200 , and a portion of the clamping member C is always placed in the clamping through holes B.

[0045] When the card-jointing through hole B corresponds to the card slot A, the card member C can be placed in the card-jointing through hole B and the card slot A at the same time.

[0046] During use, the guide ring 100 is slidably inserted into the center ring 200, and the two are fixed by the clamp C.

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

[0048] During use, the locking sleeve 300 is slidably sleeved on the outer wall of the center ring 200, and the two are also fixed by the clamping piece C.

[0049] The limiting grooves D are completely formed on the circumferential outer wall of the lock sleeve 300 , or / and a plurality of groups of limiting grooves D are formed on the circumferential outer wall of the lock sleeve 300 , and the distances between adjacent limiting grooves D are equal.

[0050] Referring to the opening manner of the slot A on the outer wall of the guide ring 100 , if the lock sleeve 300 also adopts a distribution manner of opening a plurality of groups in the circumferential direction, then the number and position of the openings need to correspond to the slot A.

[0051] The axial cross-section shape of the limiting groove D is a symmetrical shape.

[0052] The two ends of the groove section of the limiting groove D are symmetrically distributed removal surfaces D1, and the clamping member C can move along the groove bottom of the limiting groove D from the removal surfaces D1 on both sides to the inner wall of the locking sleeve 300.

[0053] Furthermore, the clamping member C may be a spherical ball, or a regular sliding block with a hexagonal cross-section.

[0054] Reference Figure 3 If the clamping member C is a spherical ball, the clamping member C can roll freely in the rectangular or circular clamping through hole B and move up and down in the clamping through hole B during use.

[0055] If the clamping member C is a regular slider with a hexagonal cross-sectional shape, then the clamping through hole B is preferably a rectangular hole used in conjunction therewith, so as to ensure that the clamping member C can slide up and down in the clamping through hole B more smoothly.

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

[0057] Furthermore, at this time, the locking sleeve 300 cannot move to the left or right. If you want to release the locking state of the locking sleeve 300 and the center ring 200, you only need to push the guide ring 100 to the right. At this time, the slot A moves to the corresponding position of the card C, and then push the locking sleeve 300 to the left. The limit slot D can push the card C to the slot A. At this time, the locking sleeve 300 can move freely outside the center ring 200.

[0058] It should be noted that in this solution, the card slot A is only allowed to move from the card connection through hole B to the left side of the card connection through hole B, so the card member C needs to be carded with the blocking surface A1 to play the role of blocking the guide ring 100.

[0059] Furthermore, when the guide ring 100 and the center ring 200 are fixed to each other under the action of the clamp C, the locking sleeve 300 can move freely outside the center ring 200 .

[0060] Reference Figures 1 to 10 In order to better apply the above-mentioned quick-insert structure, the present invention provides the following technical solution: a needle-free prefilled transmitter and a prefilled medicine core connection device, which is based on the above-mentioned quick-insert structure, including a transmitter 400, and a transmission end of the transmitter 400 is provided with an adapter 401.

[0061] The connecting shell 500 includes an outer shell 501 , a locking sleeve 300 , a center ring 200 and a guide ring 100 which are sleeved inwardly in layers, and the adapter 401 is inserted into the guide ring 100 .

[0062] The charge tube 600 comprises an outer tube 601 and a core 602 fixed therein. The charge tube 600 is inserted into the center ring 200 .

[0063] During use, the charge tube 600 is fixed by the clamping of the connecting shell 500 and connected to the launcher 400. At this time, the launcher 400 works to eject the medicine inside the medicine core 602. After the medicine core 602 is emptied, the outer shell 501 is slid to unlock the clamping lock of the center ring 200 on the outer tube 601, and the charge tube 600 can be pushed out by the guide ring 100.

[0064] The adapter 401 includes a central connecting tube 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 central ring 200, and the outer push ring 401c can be slidably inserted into the outer shell 501.

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

[0066] Reference Figure 7 The inner push ring 401b and the outer push ring 401c are fixedly sleeved on the outside of the central connecting tube 401a in a stepped manner. A liquid passage is opened on the axis of the central connecting tube 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. An annular groove is formed on the stepped surface of the inner push ring 401b and the outer push ring 401c near one end of the connecting shell 500. The first spring T1 and the second spring T2 are respectively installed in the annular groove.

[0068] 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 are respectively in contact 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 central connecting tube 401 a , and the first spring T1 applies a leftward thrust to the guide ring 100 .

[0070] An inner ring 101 is fixedly connected to the inner wall of one end of the guide ring 100 away from the first spring T1 , and a cone ring 102 is also fixedly connected to the end of the guide ring 100 .

[0071] The inner diameter of the inner ring 101 is smaller than that of the guide ring 100 and is the same as the inner diameter of the central connecting tube 401 a , so as to facilitate the docking of the inner ring 101 and the central connecting tube 401 a .

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

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

[0074] Furthermore, during use, when the inner wall of the clamping block 202b is pushed to expand outward, the clamping block 202b can push the elastic plate 202a to tilt outward.

[0075] An inner groove 202b-1 is formed on the inner wall of the clamp block 202b, and the inner grooves 202b-1 arranged circumferentially in the clamp block 202b are combined to form a clamp groove J, and the outer wall of the cone ring 102 abuts against the inner wall of the clamp block 202b.

[0076] Furthermore, the inclined outer wall of the cone ring 102 is tightly fitted with the right inner wall of the clamping block 202b.

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

[0078] A pressure ring 301 is fixedly connected to the inner wall of one end of the locking sleeve 300 away from the second spring T2 , and the outer wall of the clamping block 202 b abuts against the pressure ring 301 .

[0079] The outer wall of one end of the outer tube 601 is fixedly connected with an outer convex cone block 601a, which can be clamped 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.

[0080] In summary, reference Fig.10During use, the guide ring 100 and the locking sleeve 300 are located at the starting position under the push of the first spring T1 and the second spring T2. At this time, the clamp C extends outward and is partially located in the limit groove D. The cone ring 102 is inserted into the clamp groove J hole formed by the clamp block 202b, and the left end of the inner ring 101 is in contact with the right end of the clamp block 202b.

[0081] Furthermore, the charge tube 600 is installed, and the core 602 first enters the clamping groove J, and then the convex cone block 601a contacts the inclined surface of the inner wall of the left end of the clamping block 202b, and pushes the clamping blocks 202b around it outward until the convex cone block 601a completely enters the clamping groove J, and the shape of the inner wall of the clamping groove J complements the shape of the outer wall of the convex cone block 601a.

[0082] Furthermore, since the charging tube 600 applies a thrust to the right, it first pushes the cone ring 102, driving the guide ring 100 to move to the right, and the first spring T1 contracts until the slot A in the guide ring 100 reaches the corresponding position of the engaging through hole B. At this time, the convex cone block 601a is just completely wrapped and clamped by the clamping groove J and can no longer move to the right.

[0083] Furthermore, in the started state, the second spring T2 gives the lock sleeve 300 a leftward thrust. At this time, the lock sleeve 300 will move to the left, and the moving surface D1 will obliquely push the card C in the limit groove D, push it out of the limit groove D, and enter the card groove A, and the limit groove D is no longer blocked by the card C. The second spring T2 returns to its original position and straightens, pushing the lock sleeve 300 to the left. The inner wall of the lock sleeve 300 limits the card C in the card slot A, and the left end of the pressure ring 301 in the left-moving lock sleeve 300 abuts against the external limit ring set on the outer wall of the left end of the clamping block 202b, and at this time, the external limit ring abuts against the outer wall and fits the inner wall of the shell 501.

[0084] In this state, the elastic plate 202a and the clamping block 202b cannot open outward, which also means that the clamping groove J is always in a state of covering and clamping the convex cone block 601a, ensuring that the charge tube 600 and the center ring 200 are firmly connected.

[0085] Furthermore, if one wants to unlock the charging tube 600, one only needs to pull the outer shell 501 to the right, and the outer shell 501 drives the locking sleeve 300 to move to the right until the limit groove D on the locking sleeve 300 corresponds to the position of the engaging through hole B. At this time, the first spring T1 in the compressed state releases the pressure and pushes the guide ring 100 to the left. The card C originally located in the card slot A moves along the release surface A2 to the outside of the card slot A. At this time, the card C moves to the limit groove D under the limiting action of the outer wall of the guide ring 100.

[0086] During this process, the outer shell 501 and the locking sleeve 300 move to the right, and the clamping block 202b and the external limit ring set on the outer wall of its left end are no longer restricted by the outer shell 501 and can expand outward. The guide ring 100 pushes the outer tube 601 to the left, pushing the convex cone block 601a out of the clamping groove J. At this time, the charging tube 600 is ejected as a whole to the outside of the connecting shell 500.

[0087] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A quick-insert structure, characterized in that: include, A guide ring (100), the guide ring (100) being movable along its axis, and a slot (A) being provided on an outer wall of the guide ring (100); A center ring (200), the center ring (200) is sleeved outside the guide ring (100), a side wall of the center ring (200) is provided with a clamping through hole (B), a clamping piece (C) is arranged in the clamping through hole (B), and; A locking sleeve (300), wherein the locking sleeve (300) is sleeved outside the center ring (200), and a limiting groove (D) is provided on the inner wall of the locking sleeve (300); Wherein, the clamping slot (A) and the limiting slot (D) are located on both sides of the moving direction of the clamping member (C).

2. The quick-insertion structure according to claim 1, characterized in that: The clamping groove (A) is completely formed on the circumferential outer wall of the guide ring (100), or / and, The clamping grooves (A) are arranged in a plurality of groups on the outer wall of the guide ring (100) in a circumferential direction, and the distances between adjacent clamping grooves (A) are equal.

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

4. The quick-insertion structure according to claim 2, characterized in that: The clamping through holes (B) are provided in a plurality of groups on the outer wall of the center ring (200) in a circumferential direction, and the clamping member (C) is always partially placed in the clamping through holes (B); When the engaging through hole (B) corresponds to the card slot (A), the engaging member (C) can be placed in the engaging through hole (B) and the card slot (A) at the same time; When the snap-fitting through hole (B) corresponds to the limiting groove (D), the snap-fitting component (C) can be placed in the snap-fitting through hole (B) and the limiting groove (D) at the same time.

5. The quick-insertion structure according to any one of claims 1, 2 and 4, characterized in that: The limiting groove (D) is completely formed on the circumferential outer wall of the lock sleeve (300), or / and, The limiting grooves (D) are arranged in a plurality of groups on the outer wall of the lock sleeve (300) in a circumferential direction, and the distances between adjacent limiting grooves (D) are equal.

6. The quick-insertion structure according to claim 5, characterized in that: The axial cross-section shape of the limiting groove (D) is a symmetrical shape; Wherein, the two ends of the groove section of the limiting groove (D) are symmetrically distributed removal surfaces (D1), and the clamping member (C) can move along the groove bottom of the limiting groove (D) from the removal surfaces (D1) on both sides to the inner wall of the locking sleeve (300).

7. A device for connecting a needle-free prefilled emitter and a prefilled drug core, characterized in that: Based on the quick-insertion structure according to any one of claims 1 to 6, comprising: A transmitter (400), wherein a transmitting end of the transmitter (400) is provided with an adapter (401); A connecting shell (500), the connecting shell (500) comprising an outer shell (501) which is sleeved inwardly in layers, a locking sleeve (300), a center ring (200) and a guide ring (100), and the adapter (401) is inserted into the guide ring (100); A charge tube (600), comprising an outer tube (601) and a core (602) fixed inside the outer tube, and the charge tube (600) is inserted into a center ring (200).

8. The needle-free prefilled emitter and prefilled drug core connection device according to claim 7, characterized in that: The adapter (401) comprises a central connecting tube (401a) and an inner push ring (401b) and an outer push ring (401c) fixedly sleeved on the outer wall of one end thereof, wherein the inner push ring (401b) can be inserted into the central ring (200) by sliding, and the outer push ring (401c) can be inserted into the outer shell (501) by sliding; The ends of the inner push ring (401b) and the outer push ring (401c) away from the emitter (400) are respectively sleeved with a first spring (T1) and a second spring (T2).

9. The needle-free prefilled emitter and prefilled drug core connection device according to claim 8, characterized in that: The guide ring (100) is slidably sleeved outside the central connecting tube (401a), and the two ends of the first spring (T1) are respectively in contact with the guide ring (100) and the inner push ring (401b); An inner ring (101) is fixedly connected to the inner wall of one end of the guide ring (100) away from the first spring (T1), and a cone ring (102) is also fixedly connected to the end of the guide ring (100).

10. The needle-free prefilled emitter and prefilled drug core connection device according to claim 9, characterized in that: The center ring (200) comprises a sliding sleeve (201) and an elastic claw (202) fixed at one end thereof, wherein the elastic claws (202) are connected to the sliding sleeve (201) in a circumferentially distributed manner, and an adaption gap (X) is formed between adjacent elastic claws (202); The elastic claw (202) comprises an elastic plate (202a) and a clamping block (202b) fixed at one end thereof, and the other end of the elastic plate (202a) is fixedly connected to the sliding sleeve (201); An inner groove (202b-1) is provided on the inner wall of the clamp block (202b), and the inner grooves (202b-1) arranged in a circumferential direction in the clamp block (202b) are combined to form a clamp groove (J), and the outer wall of the cone ring (102) abuts against the inner wall of the clamp block (202b).

11. The needle-free prefilled emitter and prefilled drug core connection device according to claim 10, characterized in that: The locking sleeve (300) is slidably sleeved outside the sliding sleeve (201), and two ends of the second spring (T2) are respectively in contact with the locking sleeve (300) and the outer push ring (401c); A pressure ring (301) is fixedly connected to the inner wall of one end of the locking sleeve (300) away from the second spring (T2), and the outer wall of the clamping block (202b) is in contact with the pressure ring (301).

12. The needle-free prefilled emitter and prefilled drug core connection device according to claim 7, 8 or 10, characterized in that: An outer convex cone block (601a) is fixedly connected to the outer wall of one end of the outer tube (601), and the outer convex 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 medicine core (602) can be inserted into the central connecting tube (401a) by sliding.

Images