Front end fixing structure of needleless pre-encapsulation emitter

Abstract

The invention relates to the technical field of medical instruments, and mainly discloses a plug-in locking mechanism and a needle-free pre-encapsulation emitter front end fixing structure, the plug-in locking mechanism comprises a central clamping piece, a central sliding sleeve and a rotating clamping piece, the rotating clamping piece rotates along the outer wall of the central sliding sleeve in the circumferential direction; the guide ring is movably arranged in the central sliding sleeve, and a limiting column is arranged on the outer wall of the guide ring; the central sliding sleeve is movably sleeved with the lock sleeve, and a sliding groove is formed in the lock sleeve; the butt joint assembly comprises a shell, a central sliding sleeve, a rotary clamping piece, a guide ring and a lock sleeve, and the shell is fixedly sleeved with the shell; the transmitting end of the transmitter is provided with a connector, the guide ring is movably installed outside the connector, and the central sliding sleeve is fixedly connected outside the connector; the medicine tube assembly comprises an outer tube and an inner core fixed in the outer tube, and the outer tube is installed and fixed in the middle of the center sliding sleeve and communicated with the emitter through a connector; the needle-free pre-encapsulation emitter solves the problem that an existing needle-free pre-encapsulation emitter and a pre-encapsulation medicine core are inconvenient to disassemble and assemble.

Description

Technical Field

[0001] The invention relates to the field of medical devices, in particular to a front end fixing structure of a needle-free prefilled transmitter. 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 front-end fixing structure of a needle-free prefilled launcher, which is characterized by: comprising an outer tube; a central sliding sleeve, one end of which is provided with a plurality of groups of clamping blocks, and the outer tube is covered in a clamping space opened in the clamping block; a guide ring and a locking sleeve are respectively provided inside and outside the central sliding sleeve; wherein the guide ring is pushed by the outer tube and is interlocked and fixed with the locking sleeve, and the locking sleeve is covered outside the clamping block.

[0006] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: it also includes: a center clamp, the center clamp includes a center sleeve and a rotating clamp that rotates circumferentially along its outer wall; a guide ring, the guide ring is movably arranged in the center sleeve, and a limiting column is arranged on its outer wall; wherein, the rotating clamp is blocked and arranged in the displacement direction of the limiting column, and the limiting column can pass through the limiting groove provided on the center sleeve and slide into the clamping groove provided on the rotating clamp, and drive the rotating clamp to rotate, and; a locking sleeve, the locking sleeve is movably sleeved outside the center sleeve, and a sliding groove is provided on it; wherein, at least part of the space in the sliding groove can accommodate the sliding column connected to the rotating clamp to rotate circumferentially therein, and the remaining space in the sliding groove can accommodate the sliding column to slide horizontally therein.

[0007] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: it also includes: a docking assembly, including an outer shell, a central sleeve, a rotating clamp, a guide ring and a locking sleeve, and the outer shell is fixedly sleeved outside the outer shell; a launcher, the launch end of the launcher is provided with a connector, the guide ring is movably installed outside the connector, and the central sleeve is fixedly connected to the outside of the connector; a medicine tube assembly, including an outer tube and an inner core fixed inside it, and the outer tube is installed and fixed in the middle of the central sleeve and is connected to the launcher through the connector.

[0008] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher of the present invention: the central sliding sleeve includes a docking sleeve and sliding sleeves and spring plates fixed at both ends thereof, and the spring plates are distributed in a circumferential direction in a plurality of groups; a buffer gap is formed between the spring plates, and a stabilizing column is symmetrically fixedly connected to the outer wall of the sliding sleeve; a clamping block and a retaining ring are fixedly connected to the other end of the spring plate in sequence, and a conical clamping groove is provided on the inner wall of the clamping block, and a plurality of groups of the conical clamping grooves distributed in a circumferential direction are combined to form a clamping space.

[0009] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher of the present invention: the limit groove is symmetrically arranged on a circumferentially arranged spring plate; a guide ring is also fixedly connected to the connection between the spring plate and the docking sleeve, a stabilizing groove is formed between the guide ring and the sliding sleeve, and the outer wall of the docking sleeve is the bottom of the stabilizing groove.

[0010] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: the rotating clamp is arranged axially symmetrically, an oblique groove is provided on the edge of one end of the rotating clamp, the groove is obliquely provided in the middle of the rotating clamp, and the slide column is fixedly connected to the outer wall of the other end of the rotating clamp; a guide rail groove is provided on the inner wall of the rotating clamp, and the guide rail ring is slidably inserted into the guide rail groove; a buckle slider is fixedly connected to the inner wall of the end of the rotating clamp away from the slot, and the buckle slider is slidably engaged in the stabilizing groove.

[0011] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: the connector includes a connecting tube, an inner ring and an outer ring, the outer diameter of the inner ring is smaller than the outer diameter of the outer ring, and the two are fixedly sleeved on the outer wall near one end of the connecting tube in a stepped manner; the sliding sleeve is fixedly sleeved on the outside of the inner ring; the inner ring and the outer ring are fixedly connected with a first spring and a second spring respectively at the ends near the other end of the connecting tube.

[0012] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: the limiting column is symmetrically fixedly connected to the outer wall of one end of the guide ring, the inner wall of the other end of the guide ring is fixedly connected to an inner pressure ring, the outer wall of the inner pressure ring away from the guide ring is also fixedly connected to a sealing cone ring, the outer wall of the sealing cone ring is combined with the conical groove to form abutment with the inner wall of the clamping space; the connecting tube is slidably inserted into the guide ring and abuts against the inner pressure ring, and the first spring is connected to the end of the guide ring away from the sealing cone ring.

[0013] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: the slide groove is symmetrically opened on the outer wall of the locking sleeve in an axially central manner, and the outer shell is fixedly sleeved on the outside of the locking sleeve; the slide groove includes a sliding section and a clamping section connected and arranged on one side thereof, and the sliding section and the limit groove are located on the same direction line; the outer wall of the locking sleeve is also symmetrically opened with a stabilizing slot, and the stabilizing slot and the sliding section divide one end of the locking sleeve into four equal parts, and the stabilizing column is slidably inserted into the stabilizing slot; a retaining ring is fixedly connected to the inner wall of one end of the locking sleeve away from the opening of the sliding section.

[0014] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher described in the present invention: the locking sleeve is also provided with an insert ring at one end where a sliding groove and a stabilizing slot are provided, and the insert ring includes a docking ring body and an insert block, and the insert block is symmetrically fixedly connected to one end of the docking ring body, and the insert block can be slidably clamped to the opening of the sliding section; the end of the docking ring body away from the insert block is connected to the second spring.

[0015] In a preferred embodiment of the front end fixing structure of the needle-free prefilled launcher of the present invention: the outer wall of the outer tube close to the protruding end of the inner core is fixedly connected with a cone block, and the outer wall of the outer tube away from the protruding end of the inner core is also fixedly connected with a limiting ring; the outer tube can be inserted into the sealing cone ring, and the cone block can be clamped into the clamping space.

[0016] The beneficial effects of the present invention are:

[0017] The present invention realizes simultaneous limit locking of the guide ring and the lock sleeve by rotating the rotating clamp. The guide ring, the lock sleeve and the rotating clamp influence each other. The structure is simple, but relatively complex unlocking conditions are created, thus preventing the mechanism from being easily unlocked after being locked.

[0018] By applying the plug-in locking mechanism, the medicine tube assembly can be quickly installed, which improves the installation efficiency and reduces the difficulty of disassembly and assembly of the medicine tube assembly. While meeting the function of rapid disassembly and assembly, it can also avoid leakage of drugs in the medicine tube assembly and cause waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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 described below only relate to some embodiments of the present invention, but are not intended to limit the present invention. Among them:

[0020] Figure 1 A connection diagram of the plug-in locking mechanism is shown;

[0021] Figure 2 A schematic diagram showing the distribution of the limit slots, the locking slots and the sliding slots of the plug-in locking mechanism is shown;

[0022] Figure 3 An exploded view of the plug-in locking mechanism is shown;

[0023] Figure 4 An external schematic diagram of the front-end fixing structure of the needle-free prefilled transmitter is shown;

[0024] Figure 5 A cross-sectional view showing the front end fixing structure of the needle-free prefilled transmitter;

[0025] Figure 6 A schematic diagram of the central sliding sleeve structure of the front end fixing structure of the needle-free prefilled transmitter is shown;

[0026] Figure 7 A cross-sectional view of the center sleeve of the front end fixing structure of the needle-free prefilled launcher is shown;

[0027] Figure 8 A diagram showing the structure of the rotating clamp of the front-end fixing structure of the needle-free prefilled transmitter is shown;

[0028] Fig. 9 A schematic diagram of the connector structure of the front-end fixing structure of the needle-free prefilled transmitter is shown;

[0029] Fig.10 A schematic diagram of the locking sleeve structure of the front end fixing structure of the needle-free prefilled transmitter is shown;

[0030] Fig.11 A schematic diagram showing the installation of a locking sleeve of the front-end fixing structure of the needle-free prefilled transmitter is shown;

[0031] Fig.12 A cross-sectional view of the docking assembly of the front end fixing structure of the needle-free prefilled transmitter is shown. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] Reference Figures 1 to 12 This embodiment provides a plug-in locking mechanism and a front-end fixing structure of a needle-free prefilled launcher, which includes an outer tube 601, and a core structure filled with liquid medicine is installed in the outer tube 601.

[0035] The central sleeve 101 has a plurality of clamping blocks 101d at one end thereof, and the outer tube 601 is wrapped in a clamping space J opened in the clamping blocks 101d.

[0036] A guide ring 200 and a locking sleeve 300 are respectively arranged inside and outside the central sliding sleeve 101 .

[0037] The guide ring 200 is pushed by the outer tube 601 and is interlocked and fixed with the locking sleeve 300, and the locking sleeve 300 is covered outside the clamping block 101d.

[0038] Specifically, the central clamping member 100 includes a central sliding sleeve 101 and a rotating clamping member 102 that rotates circumferentially along the outer wall thereof.

[0039] The central sleeve 101 is a circular tubular structure, and the rotating clamp 102 is also an annular structure, which is coaxially sleeved on the outer wall of the central sleeve 101 and can only rotate circumferentially along the outer wall of the central sleeve 101 but cannot move axially.

[0040] The guide ring 200 is movably arranged in the center sleeve 101, and a limiting column 201 is arranged on its outer wall. The guide ring 200 is also a columnar tube structure, which is inserted into the center sleeve 101 and moves axially in the internal cavity of the center sleeve 101, but cannot rotate circumferentially.

[0041] The rotating clamp 102 is blocked in the displacement direction of the limiting column 201 , and the limiting column 201 can slide through the limiting groove A opened on the central sleeve 101 to the groove B opened on the rotating clamp 102 , and drive the rotating clamp 102 to rotate.

[0042] Furthermore, the card slot B deviates from the straight line where the limiting slot A is located, and is obliquely opened on the outer wall of the rotating clamp 102, and the plane where the card slot B is located and the plane where the limiting slot A is located form an angle.

[0043] Specifically, the starting position of the limiting column 201 is located in the slot opening on the left side of the limiting slot A that is not covered by the rotating clamp 102 , and the starting opening at the left end of the clamping slot B coincides with the slot opening of the limiting slot A.

[0044] Reference Figure 2 , with the direction from the starting opening at the left end of the slot B to the terminal end on the right side of the slot B as the first direction line, and the direction from the starting opening at the left end of the slot B to the slot opening on the right side of the limit slot A covered by the rotating clamp 102 as the second direction line, wherein the starting opening at the left end of the slot B is taken as the vertex to construct an acute angle.

[0045] The locking sleeve 300 is movably mounted outside the central sliding sleeve 101 and has a sliding groove C formed thereon.

[0046] Among them, at least part of the space of the slide groove C can accommodate the slide column D connected to the rotating clamp 102 to rotate circumferentially therein, and the remaining space of the slide groove C can accommodate the slide column D to slide horizontally therein.

[0047] During use, refer to Figure 2 , the central sliding sleeve 101 is always in a stationary state, the guide ring 200 and the locking sleeve 300 are both subjected to a force acting to the left, the difference is that, referring to Figure 2 , the final state of the guide ring 200 being subjected to the left force and the initial state of the locking sleeve 300 being subjected to the left force are shown.

[0048] Further, the guide ring 200 is pushed to the right, and the limit column 201 moves to the right accordingly until it reaches the left end opening of the slot B. The guide ring 200 is further pushed, and the limit column 201 enters the inclined slot B. During this process, the limit column 201 controls the circumferential rotation of the rotating clamp 102 by pushing the slot wall at the lower right side of the slot B. The slide column D rotates out from the side slide groove C and enters the slide groove C area overlapping with the limit groove A.

[0049] Because the lock sleeve 300 is subjected to the left-direction force, the lock sleeve 300 is no longer limited by the slide column D and will move to the left. Finally, the limit column 201 is located at the right end of the slot B, and the inner slide column D is located at the right end of the slot C. If the lock sleeve 300 is no longer pushed to the right, the rotating clamp 102 will not rotate actively, and the guide ring 200 will be released from the center sleeve 101, thereby achieving the purpose of interlocking and limiting.

[0050] Furthermore, the docking assembly 400 includes a shell 401 , a central sliding sleeve 101 , a rotating clamp 102 , a guide ring 200 and a locking sleeve 300 , and the shell 401 is fixedly sleeved outside the shell 401 .

[0051] The outer shell 401 is a protective structure for the internal components, providing a gripping position for the staff, and an anti-skid component may be fixed to the outside thereof, and the anti-skid component may be an anti-skid pattern or an anti-skid bump.

[0052] The transmitter 500 has a connector 501 at its transmitting end, the guide ring 200 is movably mounted outside the connector 501 , and the center sliding sleeve 101 is fixedly connected outside the connector 501 .

[0053] Among them, a convex column structure is set at the center of the transmitting end of the transmitter 500, and the connector 501 can be fixedly sleeved on the outside of the convex column structure by interference fit, or a thread is opened on the outside of the convex column structure, and the connector 501 is fixedly connected to the convex column structure by thread.

[0054] The drug tube assembly 600 includes an outer tube 601 and an inner core 602 fixed therein. The outer tube 601 is installed and fixed in the middle of the central sleeve 101 and communicates with the transmitter 500 through the connector 501.

[0055] The inner core 602 is an existing structure, in which liquid medicine is stored. A nut is threadedly fixed on one side of the outer tube 601 away from the protruding end of the inner core 602 to prevent the liquid medicine from spilling out.

[0056] During use, the internal pressurization structure of the transmitter 500 can be connected to the inner core 602 through the internal chamber of the connector 501, pressurizing the internal space of the inner core 602, and opening the nut, the liquid medicine inside the inner core 602 can be sprayed out.

[0057] As an optional embodiment, the central sliding sleeve 101 includes a docking sleeve 101a and sliding sleeves 101b and spring plates 101c fixed at both ends thereof, and the spring plates 101c are distributed in a circumferential direction in a plurality of groups; a buffer gap X is formed between the spring plates 101c, and a stabilizing column 101b-1 is symmetrically fixedly connected to the outer wall of the sliding sleeve 101b.

[0058] Specifically, the central sleeve 101 is made of plastic or metal as a whole, and the spring plates 101c have a certain degree of ductility. When the center of the circumferentially arranged spring plates 101c is subjected to an outward thrust, the spring plates 101c can slightly expand outward, and the buffer gap X shrinks at this time until the two adjacent sets of spring plates 101c fit closely together.

[0059] The other end of the spring plate 101c is fixedly connected with a clamping block 101d and a retaining ring 101e in sequence. A conical clamping groove 101d-1 is opened on the inner wall of the clamping block 101d. A plurality of groups of conical clamping grooves 101d-1 distributed circumferentially are combined to form a clamping space J.

[0060] Among them, the inner diameter of the bottom of the conical groove 101d-1 is smaller than the inner diameter of the opening of the clamping space J on both sides, and the outer tube 601 is fixedly clamped in the clamping space J.

[0061] The limiting grooves A are symmetrically arranged on the spring plate 101c arranged in the circumferential direction, and the limiting grooves A are straight groove structures.

[0062] A guide ring 101c-1 is fixedly connected to the connection between the spring plate 101c and the docking sleeve 101a. A stable groove 101a-1 is formed between the guide ring 101c-1 and the sliding sleeve 101b. The outer wall of the docking sleeve 101a is the bottom of the stable groove 101a-1.

[0063] The rotating clamp 102 is axially symmetrically arranged. An inclined groove 102a is provided on the edge of one end of the rotating clamp 102. The groove B is obliquely provided in the middle of the rotating clamp 102. The sliding column D is fixedly connected to the outer wall of the other end of the rotating clamp 102.

[0064] A guide rail groove 102b is formed on the inner wall of the rotating clamp 102, and the guide rail ring 101c-1 is slidably inserted into the guide rail groove 102b.

[0065] During use, two sets of relatively independent rotating clamps 102 are respectively arranged on the opposite outer walls of the docking sleeve 101a. At this time, the sliding column D is correspondingly slidably placed in the sliding groove C. The two sets of rotating clamps 102 are relatively independent, but rotate at the same time.

[0066] A buckle slider 102d is fixedly connected to the inner wall of one end of the rotating clamp 102 away from the clamping slot B. The buckle slider 102d is slidably engaged in the stable slot 101a-1. The function of the buckle slider is to assist the rotating clamp 102 to rotate smoothly.

[0067] The connector 501 includes a connecting tube 501a, an inner ring 501b and an outer ring 501c. The outer diameter of the inner ring 501b is smaller than that of the outer ring 501c, and the two are fixedly sleeved on the outer wall of one end of the connecting tube 501a in a stepped manner.

[0068] Specifically, the cross-sectional shape of the inner supporting ring 501b and the outer supporting ring 501c is a "convex" shape.

[0069] The sliding sleeve 101b is fixedly sleeved on the outside of the inner annular ring 501b, the inner diameter of the sliding sleeve 101b is equal to the outer diameter of the inner annular ring 501b, and the outer diameter of the sliding sleeve 101b is equal to the outer diameter of the sliding sleeve 101b.

[0070] The inner and outer abutment rings 501b and 501c are respectively fixedly connected with a first spring T1 and a second spring T2 near the other end of the connecting tube 501a.

[0071] Specifically, an installation groove is provided at one end of the outer ring 501c close to the inner ring 501b to facilitate the storage and installation of the second spring T2.

[0072] The limiting column 201 is symmetrically fixedly connected to the outer wall of one end of the guide ring 200, and the inner wall of the other end of the guide ring 200 is fixedly connected to the inner pressure ring 202. The outer wall of the inner pressure ring 202 away from the guide ring 200 is also fixedly connected to a sealing cone ring 203. The outer wall of the sealing cone ring 203 is combined with the conical groove 101d-1 to form a clamping space J that abuts against the inner wall.

[0073] The connecting pipe 501 a is slidably inserted into the guide ring 200 and abuts against the inner pressure ring 202 . The first spring T1 is connected to one end of the guide ring 200 away from the sealing cone ring 203 .

[0074] Reference Fig.12 Specifically, the inner pressure ring 202 converges the left end opening of the guide ring 200 to form a small-mouthed and large-bellied accommodating space, and the sealing cone ring 203 is seamlessly connected to the end of the inner pressure ring 202.

[0075] During use, the sealing cone ring 203 is inserted into the right opening of the clamping space J. The clamping space J is connected with the internal space of the guide ring 200 through the sealing cone ring 203 and the center hole of the inner pressure ring 202, and then connected with the interior of the launcher 500 through the connecting pipe 501a.

[0076] The slide groove C is axially and centrally symmetrically provided on the outer wall of the lock sleeve 300 , and the outer shell 401 is fixedly sleeved on the outside of the lock sleeve 300 .

[0077] The slide groove C includes a sliding section C1 and a clamping section C2 which is connected and arranged on one side thereof. The sliding section C1 and the limiting groove A are located on the same direction line.

[0078] Specifically, the clamping section C2 and the sliding section C1 form an "L"-shaped sliding groove C. The clamping section C2 accommodates the sliding column D to rotate circumferentially therein, and the sliding section C1 accommodates the sliding column D to slide horizontally therein.

[0079] The outer wall of the lock sleeve 300 is symmetrically provided with a stabilizing slot 301 . The stabilizing slot 301 and the sliding section C1 divide one end of the lock sleeve 300 into four equal parts. The stabilizing column 101 b - 1 is slidably inserted into the stabilizing slot 301 .

[0080] During use, the stabilizing column 101b - 1 can be slidably inserted into the stabilizing slot 301 to limit the circumferential rotation of the central sliding sleeve 101 .

[0081] A retaining ring 302 is fixedly connected to the inner wall of one end of the locking sleeve 300 away from the opening of the sliding section C1 .

[0082] The locking sleeve 300 is also provided with an insert ring 303 at one end where the sliding groove C and the stabilizing slot 301 are opened. The insert ring 303 includes a docking ring body 303a and an insert block 303b. The insert block 303b is symmetrically fixedly connected to one end of the docking ring body 303a, and the insert block 303b can be slidably clamped into the opening of the sliding section C1.

[0083] The insert block 303b is inserted into the opening of the sliding section C1 by interference fit.

[0084] One end of the docking ring body 303a away from the plug block 303b is connected to the second spring T2, and the second spring T2 applies a leftward force to the locking sleeve 300 through the plug ring 303.

[0085] The outer wall of the outer tube 601 close to the extended end of the inner core 602 is fixedly connected with a cone block 601a, and the outer wall of the outer tube 601 on the side of the cone block 601a away from the extended end of the inner core 602 is also fixedly connected with a limiting ring 601b.

[0086] The outer tube 601 can be inserted into the sealing cone ring 203, and the clamping cone block 601a can be clamped into the clamping space J.

[0087] In summary, refer to Fig.12 During use, the guide ring 200 in the initial state is pushed to the left by the first spring T1, so that the sealing cone ring 203 is inserted into the right opening of the clamping space J, the limiting column 201 is located at the starting position of the left end of the limiting groove A, the sliding column D is located in the clamping section C2, and the locking sleeve 300 is restricted by the sliding column D, so that the second spring T2 is compressed, and the locking sleeve 300 has a sliding tendency to the left.

[0088] Furthermore, if the launcher 500 is to be clamped and fixed, first align one end of the outer tube 601 connected to the cone block 601a with the left opening of the clamping space J, and further push the outer tube 601 to the right. The cone block 601a props up the surrounding blocks 101d to the outside, and the block 101d drives the spring plate 101c to be propped up, and the right opening of the clamping space J is expanded, and finally the cone block 601a enters the clamping space J.

[0089] Furthermore, the outer tube 601 pushes the sealing cone ring 203 to move, pushing it out of the right opening of the clamping space J, and the first spring T1 is compressed to the left.

[0090] Furthermore, the limiting column 201 moves to the left and enters the slot B, and drives the rotating clamp 102 to rotate circumferentially by pushing the oblique side wall of the slot B. The sliding column D rotates to the connection point between the clamping section C2 and the sliding section C1. At this time, the locking sleeve 300 is no longer limited by the clamping section C2, and the second spring T2 is released and straightened, pushing the locking sleeve 300 to move to the left, and the sliding column D is inserted into the sliding section C1. At this time, the sliding column D can rotate circumferentially through the sliding column D.

[0091] Furthermore, the leftward moving locking sleeve 300 drives the outer shell 401 to move leftward until the push ring 101e abuts against the right end of the retaining ring connected to the inner wall of the left end of the locking sleeve 300. At this time, the push ring 101e is received in the left end opening of the outer shell 401. Since the outer shell 401 and the retaining ring are completely covered by the push ring 101e and the clamping block 101d, they can no longer expand outward, thereby achieving the tight clamping of the clamping space J on the clamping cone block 601a.

[0092] To remove the fixed transmitter 500, first pull the outer shell 401 to the right, the second spring T2 is squeezed and contracted, and at the same time the first spring T1 gives a leftward thrust to the end of the outer tube 601 through the locking sleeve 300. When the left end of the rightwardly moved outer shell 401 slides out of the coverage of the push ring 101e and the block 101d, the sealing cone ring 203 pushes the cone block 601a on the outer tube 601 out of the clamping space J.

[0093] During this process, the locking sleeve 300 moves to the left, and the sliding column D moves to the connection point between the clamping section C2 and the sliding section C1. The limiting column 201 pushes the inner wall of the left side of the clamping slot B. At this time, the rotating clamp 102 rotates in the opposite direction, and the sliding column D re-enters the clamping section C2 and returns to its initial state, thereby realizing the automatic ejection of the drug tube assembly 600.

[0094] 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 front-end fixing structure of a needle-free prefilled transmitter, characterized in that: include, Outer tube (601); A central sliding sleeve (101), wherein one end of the central sliding sleeve (101) is provided with a plurality of groups of clamping blocks (101d), and the outer tube (601) is covered and arranged in a clamping space (J) opened in the clamping block (101d); The central sliding sleeve (101) is provided with a guide ring (200) and a locking sleeve (300) inside and outside respectively; The guide ring (200) is pushed by the outer tube (601) and is interlocked and fixed with the locking sleeve (300), and the locking sleeve (300) is covered outside the clamping block (101d).

2. The front end fixing structure of the needle-free prefilled transmitter according to claim 1 is characterized in that: It also includes a central clamping member (100), wherein the central clamping member (100) includes a central sliding sleeve (101) and a rotating clamping member (102) that rotates circumferentially along the outer wall thereof; The guide ring (200) is movably arranged in the central sliding sleeve (101), and a limiting column (201) is arranged on the outer wall of the guide ring; The rotating clamp (102) is blocked and arranged in the displacement direction of the limiting column (201), and the limiting column (201) can pass through the limiting groove (A) provided on the central sliding sleeve (101) and slide into the groove (B) provided on the rotating clamp (102), thereby driving the rotating clamp (102) to rotate, and; A locking sleeve (300), wherein the locking sleeve (300) is movably mounted outside the central sliding sleeve (101) and is provided with a sliding groove (C); Among them, at least part of the space of the slide groove (C) can accommodate the slide column (D) connected to the rotating clamp (102) to rotate circumferentially therein, and the remaining space of the slide groove (C) can accommodate the slide column (D) to slide horizontally therein.

3. The front end fixing structure of the needle-free prefilled transmitter according to claim 2 is characterized in that: Also includes, The docking assembly (400) comprises a housing (401), a central sliding sleeve (101), a rotating clamp (102), a guide ring (200) and a locking sleeve (300), wherein the housing (401) is fixedly sleeved outside the housing (401); A transmitter (500), wherein a transmitting end of the transmitter (500) is provided with a connector (501), the guide ring (200) is movably mounted outside the connector (501), and the central sliding sleeve (101) is fixedly connected outside the connector (501); The medicine tube assembly (600) comprises an outer tube (601) and an inner core (602) fixed therein. The outer tube (601) is installed and fixed in the middle of the central sliding sleeve (101) and is connected to the transmitter (500) through a connector (501).

4. The front end fixing structure of the needle-free prefilled transmitter according to claim 3 is characterized in that: The central sliding sleeve (101) comprises a docking sleeve (101a) and sliding sleeves (101b) and spring plates (101c) fixed at two ends thereof, wherein the spring plates (101c) are arranged in a plurality of groups distributed in a circumferential direction; a buffer gap (X) is formed between the spring plates (101c); and a stabilizing column (101b-1) is symmetrically fixedly connected to the outer wall of the sliding sleeve (101b); The other end of the spring plate (101c) is fixedly connected in sequence with a clamping block (101d) and a retaining ring (101e); a conical clamping groove (101d-1) is provided on the inner wall of the clamping block (101d); and a plurality of groups of the conical clamping grooves (101d-1) distributed in a circumferential direction are combined to form a clamping space (J).

5. The front end fixing structure of the needle-free prefilled transmitter according to claim 4 is characterized in that: The limiting groove (A) is symmetrically arranged on the spring-locking plate (101c) arranged in the circumferential direction; A guide rail ring (101c-1) is also fixedly connected at the connection point between the spring plate (101c) and the docking sleeve (101a); a stable groove (101a-1) is formed between the guide rail ring (101c-1) and the sliding sleeve (101b); and the outer wall of the docking sleeve (101a) is the bottom of the stable groove (101a-1).

6. The front end fixing structure of the needle-free prefilled transmitter according to claim 5, characterized in that: The rotating clamp (102) is arranged symmetrically about the axis, an oblique groove (102a) is provided on the edge of one end of the rotating clamp (102), the groove (B) is obliquely provided in the middle of the rotating clamp (102), and the slide column (D) is fixedly connected to the outer wall of the other end of the rotating clamp (102); The inner wall of the rotating clamp (102) is provided with a guide rail groove (102b), and the guide rail ring (101c-1) is slidably inserted into the guide rail groove (102b); A buckling slider (102d) is fixedly connected to the inner wall of one end of the rotating clamp (102) away from the clamping groove (B), and the buckling slider (102d) is slidably engaged in the stable groove (101a-1).

7. The front end fixing structure of the needle-free prefilled transmitter according to any one of claims 4 to 6, characterized in that: The connector (501) comprises a connecting pipe (501a), an inner abutment ring (501b) and an outer abutment ring (501c); the outer diameter of the inner abutment ring (501b) is smaller than the outer diameter of the outer abutment ring (501c), and the two are fixedly sleeved on the outer wall of one end of the connecting pipe (501a) in a stepped shape; The sliding sleeve (101b) is fixedly sleeved on the outside of the inner abutment ring (501b); The inner abutment ring (501b) and the outer abutment ring (501c) are respectively fixedly connected with a first spring (T1) and a second spring (T2) at the ends close to the other end of the connecting pipe (501a).

8. The front end fixing structure of the needle-free prefilled transmitter according to claim 7, characterized in that: The limiting column (201) is symmetrically fixedly connected to the outer wall of one end of the guide ring (200), the inner wall of the other end of the guide ring (200) is fixedly connected to an inner pressure ring (202), and the outer wall of the inner pressure ring (202) away from the guide ring (200) is also fixedly connected to a sealing cone ring (203), and the outer wall of the sealing cone ring (203) is combined with the conical groove (101d-1) to form an inner wall of the clamping space (J) for abutment; The connecting pipe (501a) is slidably inserted into the guide ring (200) and abuts against the inner pressure ring (202), and the first spring (T1) is connected to an end of the guide ring (200) away from the sealing cone ring (203).

9. The front end fixing structure of the needle-free prefilled transmitter according to claim 8, characterized in that: The slide groove (C) is axially and centrally symmetrically arranged on the outer wall of the lock sleeve (300), and the outer shell (401) is fixedly sleeved outside the lock sleeve (300); The slide groove (C) comprises a sliding section (C1) and a clamping section (C2) which is arranged on one side thereof and is in communication therewith, and the sliding section (C1) and the limiting groove (A) are located on the same direction line; The outer wall of the lock sleeve (300) is also symmetrically provided with a stabilizing slot (301), the stabilizing slot (301) and the sliding section (C1) divide one end of the lock sleeve (300) into four equal parts, and the stabilizing column (101b-1) is slidably inserted into the stabilizing slot (301); A retaining ring (302) is fixedly connected to the inner wall of one end of the locking sleeve (300) away from the opening of the sliding section (C1).

10. The front end fixing structure of the needle-free prefilled transmitter according to claim 8 or 9, characterized in that: The locking sleeve (300) is also provided with an insert ring (303) at one end provided with the sliding groove (C) and the stabilizing slot (301), the insert ring (303) comprising a docking ring body (303a) and an insert block (303b), the insert block (303b) being symmetrically fixedly connected to one end of the docking ring body (303a), and the insert block (303b) can be slidably clamped into the opening of the sliding section (C1); One end of the docking ring body (303a) away from the plug-in block (303b) is connected to the second spring (T2).

11. The front end fixing structure of the needle-free prefilled transmitter according to claim 10, characterized in that: The outer wall of the outer tube (601) close to the protruding end of the inner core (602) is fixedly connected to a cone block (601a), and the outer wall of the outer tube (601) on the side of the cone block (601a) away from the protruding end of the inner core (602) is also fixedly connected to a limiting ring (601b); The outer tube (601) can be inserted into the sealing cone ring (203) and the clamping cone block (601a) can be clamped into the clamping space (J).

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