Front end fixing structure of needleless pre-encapsulation emitter

Abstract

The utility model 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, which comprise a central clamping piece, a central sliding sleeve and a rotating clamping piece rotating along the circumferential direction of the outer wall of the central sliding sleeve; 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 utility model relates to the field of medical instrument especially a needleless pre-filled launcher front end fixed structure. BACKGROUND

[0002] In the field of medical injection, the traditional needle injection method has many drawbacks. Needle stick injury can easily cause occupational exposure of medical staff and increase 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 as the times require. It 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 that can easily cause drug leakage and complex operation that affects 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 needle-free pre-filled launcher front end fixed structure, characterized by: including an outer tube; a center sleeve having a plurality of clamping blocks at one end; the outer tube is covered and arranged in the clamping space opened in the clamping block; a guide ring and a lock sleeve are respectively arranged inside and outside the center sleeve; wherein the guide ring is pushed by the outer tube and is connected and fixed with the lock sleeve, and the lock sleeve is covered outside the clamping block.

[0006] In one preferred embodiment of the needle-free pre-filled launcher front end fixed structure described in the utility model: it further includes a center clamping piece, the center clamping piece includes a center sleeve and a rotating clamping piece rotating along the outer wall thereof; a guide ring movably arranged in the center sleeve has a limiting column on its outer wall; wherein the rotating clamping piece is arranged in the displacement direction of the limiting column, and the limiting column can slide into the clamping groove on the rotating clamping piece through the limiting groove on the center sleeve and drive the rotating clamping piece to rotate; and a lock sleeve movably sleeved outside the center sleeve has a sliding groove on it; wherein at least part of the space of the sliding groove can accommodate the sliding column connected to the rotating clamping piece to rotate inside it, and the remaining space of the sliding groove can accommodate the sliding column to slide horizontally inside it.

[0007] In a preferred embodiment of the needle-free pre-filled launcher front end fixing structure, the docking assembly comprises a shell, a center sliding sleeve, a rotating clamping piece, a guide ring and a locking sleeve, the shell is fixedly sleeved on the shell; the launcher is provided with a connector at the launcher emitting end, the guide ring is movably installed outside the connector, and the center sliding sleeve is fixedly connected outside the connector; the medicine tube assembly comprises an outer tube and an inner core fixedly arranged in the outer tube, the outer tube is fixedly installed in the middle part of the center sliding sleeve and is communicated with the launcher through the connector.

[0008] In a preferred embodiment of the needle-free pre-filled launcher front end fixing structure, the center sliding sleeve comprises a docking sleeve and sliding sleeves and clamping spring plates fixedly arranged at both ends of the docking sleeve, the clamping spring plates are circumferentially distributed; the clamping spring plates are formed with buffer gaps therebetween, and the outer wall of the sliding sleeve is symmetrically fixedly connected with stabilizing columns; the other end of the clamping spring plate is fixedly connected with a clamping block and a resisting ring in sequence, the inner wall of the clamping block is provided with a tapered clamping groove, and a plurality of groups of the tapered clamping grooves are circumferentially distributed and combined to form a clamping space.

[0009] In a preferred embodiment of the needle-free pre-filled launcher front end fixing structure, the limiting grooves are symmetrically arranged on the circumferentially arranged clamping spring plates; the connecting part of the clamping spring plate and the docking sleeve is further fixedly connected with a guide rail ring, a stabilizing groove is formed between the guide rail ring and the sliding sleeve, and the outer wall of the docking sleeve is the groove bottom of the stabilizing groove.

[0010] In a preferred embodiment of the needle-free pre-filled launcher front end fixing structure, the rotating clamping piece is arranged in axial central symmetry, an inclined groove is arranged at the edge of one end of the rotating clamping piece, a clamping groove is obliquely arranged in the middle part of the rotating clamping piece, and a sliding column is fixedly connected to the outer wall of the other end of the rotating clamping piece; a guide rail groove is arranged in the inner wall of the rotating clamping piece, the guide rail ring is slidably inserted into the guide rail groove; a lower buckle sliding block is fixedly connected to the inner wall of the end of the rotating clamping piece away from the clamping groove, and the lower buckle sliding block is slidably clamped in the stabilizing groove.

[0011] In a preferred embodiment of the needle-free pre-filled launcher front end fixing structure, the connector comprises a communication pipe, an inner resisting ring and an outer resisting ring, the outer diameter of the inner resisting ring is smaller than that of the outer resisting ring, and the two are fixedly sleeved on the outer wall of one end close to the communication pipe in a stepped manner; the sliding sleeve is fixedly sleeved on the outer resisting ring; the inner resisting ring and the outer resisting ring are respectively fixedly connected with a first spring and a second spring close to the other end of the communication pipe.

[0012] In a preferred embodiment of the needle-free pre-filled emitter front end fixing structure, the limiting column is symmetrically fixed and connected to the outer wall of one end of the guide ring, the other end of the guide ring is fixed and connected with an inner pressure ring, the inner pressure ring is further fixed and connected with a sealing cone ring away from the outer wall of one end of the guide ring, and the outer wall of the sealing cone ring and the tapered clamping groove are combined to form the inner wall of the clamping space.

[0013] In a preferred embodiment of the needle-free pre-filled emitter front end fixing structure, the sliding groove is axially centrally symmetrically arranged on the outer wall of the lock sleeve, and the outer shell is fixedly sleeved on the lock sleeve; the sliding groove comprises a sliding section and a clamping section arranged on one side of the sliding section in communication, and the sliding section is located on the same direction line as the limiting groove; the outer wall of the lock sleeve is further symmetrically provided with a stable insertion groove, the stable insertion groove and the sliding section divide one end of the lock sleeve into four equal parts, and the stable column is slidably inserted into the stable insertion groove; the inner wall of one end of the lock sleeve away from the opening of the sliding section is fixedly connected with a blocking ring.

[0014] In a preferred embodiment of the needle-free pre-filled emitter front end fixing structure, the lock sleeve is further provided with an insertion ring at one end provided with the sliding groove and the stable insertion groove, the insertion ring comprises a butt joint ring body and a butt joint block, the butt joint block is symmetrically fixed and connected to one end of the butt joint ring body, and the butt joint block can be slidably clamped into the opening of the sliding section; one end of the butt joint ring body away from the butt joint block is connected with the second spring.

[0015] In a preferred embodiment of the needle-free pre-filled emitter front end fixing structure, the outer wall of the outer tube close to the extension end of the inner core is fixedly connected with a clamping cone block, and the outer wall of the outer tube away from one side of the extension end of the inner core is further fixedly connected with a limiting ring; the outer tube can be inserted into the sealing cone ring in cooperation, and the clamping cone block can be clamped into the clamping space in cooperation.

[0016] The utility model discloses the beneficial effect lies in:

[0017] The utility model discloses the rotation of rotating fastener realizes the simultaneous position limiting locking of guide ring and lock sleeve, and guide ring, lock sleeve and rotating fastener influence each other, and the structure is simple, but creates the relatively complicated unlocking condition, avoids the easy unlocking after mechanism locking.

[0018] Through the application of the plug-in locking mechanism, the quick installation of the medicine pipe assembly can be realized, the installation efficiency is improved, the disassembly and assembly difficulty of the medicine pipe assembly is reduced, the medicine leakage in the medicine pipe assembly is avoided while meeting the quick disassembly and assembly function, and resource waste is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described in the following are only related to some embodiments of the present application, and are not a limitation on the present application. Among them:

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

[0021] Figure 2 The distribution schematic diagram of the limiting groove, the clamping groove and the sliding groove of the plug-in locking mechanism is shown;

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

[0023] Figure 4 The external schematic diagram of the needle-free pre-filled emitter front end fixing structure is shown;

[0024] Figure 5 The sectional view of the needle-free pre-filled emitter front end fixing structure is shown;

[0025] Figure 6 The center sliding sleeve structure schematic diagram of the needle-free pre-filled emitter front end fixing structure is shown;

[0026] Figure 7 The center sliding sleeve sectional view of the needle-free pre-filled emitter front end fixing structure is shown;

[0027] Figure 8 The rotating clamping piece structure diagram of the needle-free pre-filled emitter front end fixing structure is shown;

[0028] Figure 9 The connector structure schematic diagram of the needle-free pre-filled emitter front end fixing structure is shown;

[0029] Figure 10 The lock sleeve structure schematic diagram of the needle-free pre-filled emitter front end fixing structure is shown;

[0030] Figure 11 The lock sleeve installation schematic diagram of the needle-free pre-filled emitter front end fixing structure is shown;

[0031] Figure 12 The butt joint assembly sectional view of the needle-free pre-filled emitter front end fixing structure is shown. DETAILED DESCRIPTION

[0032] In order to make the skilled in the art better understand the present application, the present application will be further described in detail below in combination with specific embodiments and drawings.

[0033] The terms used in the present utility model are those general terms currently widely used in the art in consideration of the functions of the present utility model, but the terms can be changed according to the intention, precedent or new technology of those skilled in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present utility model. Therefore, the terms used in the specification should not be understood as mere names, but based on the meaning of the terms and the overall description of the present utility model.

[0034] Referring to Figures 1-12 The embodiment provides a plug-in locking mechanism and a needle-free pre-filled syringe front end fixing structure, which comprises an outer tube 601, and a medicine core structure filled with medicine liquid is arranged in the outer tube 601.

[0035] The center sliding sleeve 101 is provided with a plurality of sets of clamping blocks 101d at one end, and the outer tube 601 is arranged in the clamping space J formed in the clamping blocks 101d.

[0036] The center sliding sleeve 101 is provided with a guide ring 200 and a lock sleeve 300.

[0037] The guide ring 200 is pushed by the outer tube 601 and is connected and fixed with the lock sleeve 300, and the lock sleeve 300 is arranged outside the clamping blocks 101d.

[0038] Specifically, the center clamping piece 100 comprises the center sliding sleeve 101 and the rotating clamping piece 102 which rotates in the circumferential direction of the outer wall of the center sliding sleeve 101.

[0039] The center sliding sleeve 101 is a circular tubular structure, and the rotating clamping piece 102 is also a ring structure and is coaxially connected to the outer wall of the center sliding sleeve 101, can only rotate in the circumferential direction of the outer wall of the center sliding sleeve 101 and cannot move axially.

[0040] The guide ring 200 is movably arranged in the center sliding sleeve 101, and the outer wall of the guide ring 200 is provided with a limiting column 201; the guide ring 200 is also a columnar pipe structure, is inserted into the center sliding sleeve 101 and moves axially in the inner cavity of the center sliding sleeve 101 and cannot rotate circumferentially.

[0041] The rotating clamping piece 102 is arranged in the displacement direction of the limiting column 201, and the limiting column 201 can slide through the limiting groove A formed in the center sliding sleeve 101 into the clamping groove B formed in the rotating clamping piece 102 and drive the rotating clamping piece 102 to rotate.

[0042] Further, the clamping groove B is inclined and formed on the outer wall of the rotating clamping piece 102 and deviates from the straight line where the limiting groove A is located, and the plane where the groove line of the clamping groove B is located and the plane where the groove line of the limiting groove A is located form an angle.

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

[0044] Referring to Figure 2 , the starting opening at the left end of the clamping slot B is taken as the vertex, and an acute angle is constructed.

[0045] The lock sleeve 300 is movably sleeved on the center sleeve 101, and a sliding groove C is formed on the lock sleeve 300.

[0046] At least part of the space of the sliding groove C can accommodate the circumferential rotation of the sliding column D connected to the rotating clamp 102 inside, and the remaining space of the sliding groove C can accommodate the horizontal sliding of the sliding column D inside.

[0047] In use, referring to Figure 2 , the center sleeve 101 is always in a stationary state, and the guide ring 200 and the lock sleeve 300 are subjected to leftward force, the difference lies in that, referring to Figure 2 , the final state of the guide ring 200 subjected to the leftward force and the initial state of the lock sleeve 300 subjected to the leftward force are shown.

[0048] Further, the guide ring 200 is pushed to the right, and the limiting column 201 moves to the right until it reaches the left end opening of the clamping slot B, and the guide ring 200 is further pushed, and the limiting column 201 enters the inclined clamping slot B, in this process, the limiting column 201 pushes the right lower slot wall of the clamping slot B, thereby controlling the circumferential rotation of the rotating clamp 102, and the sliding column D rotates out of the sliding groove C from the side and enters the sliding groove C area coinciding with the limiting slot A.

[0049] Because the lock sleeve 300 is subjected to the leftward force, the lock sleeve 300 is no longer subjected to the clamping and limiting of the sliding column D, and will move to the left, and finally the limiting column 201 is located at the right end termination of the clamping slot B, and the inner sliding column D is located at the right end termination of the sliding groove C, if the lock sleeve 300 is not pushed to the right, the rotating clamp 102 will not rotate actively, the guide ring 200 is released from the center sleeve 101, thereby achieving the purpose of interlocking and limiting.

[0050] Further, the docking assembly 400 includes the shell 401, the center sleeve 101, the rotating clamp 102, and the guide ring 200 and the lock sleeve 300, and the shell 401 is fixedly sleeved outside the shell 401.

[0051] The shell 401 is a protective structure for internal components and provides a holding position for workers, and the outer portion can be fixed with anti-slip components such as anti-slip patterns or anti-slip bumps.

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

[0053] The transmitter 500 has a protruding post structure at the center of the transmitter end. The connector 501 can be interference-fitted onto the outside of the protruding post structure, or a thread can be opened on the outside of the protruding post structure, and the connector 501 is threadedly fixed to the protruding post structure.

[0054] The drug delivery assembly 600 includes an outer tube 601 and an inner core 602 fixed inside it. The outer tube 601 is mounted and fixed in the middle of the central sliding sleeve 101 and is connected to the transmitter 500 via a connector 501.

[0055] The inner core 602 is an existing structure, which stores the medicine inside. The outer tube 601 is threaded with a nut on the side away from the protruding end of the inner core 602 to prevent the medicine from spilling out.

[0056] During use, the internal pressurization structure of the transmitter 500 can communicate with the inner core 602 through the internal chamber of the connector 501 to pressurize the internal space of the inner core 602. When the nut is opened, the liquid inside the inner core 602 can be sprayed out.

[0057] As an optional embodiment, the central sliding sleeve 101 includes a mating sleeve 101a and sliding sleeves 101b and spring plates 101c fixed at its two ends. Several groups of spring plates 101c are distributed circumferentially. A buffer gap X is formed between the spring plates 101c. A stabilizing column 101b-1 is symmetrically fixedly connected to the outer wall of the sliding sleeve 101b.

[0058] Specifically, the central sliding sleeve 101 is made of plastic or metal, and the spring plate 101c has a certain degree of extensibility. When the center of the circumferentially arranged spring plate 101c is subjected to an outward thrust, the spring plate 101c can expand slightly outward. At this time, the buffer gap X contracts until the two adjacent sets of spring plates 101c fit tightly together.

[0059] The other end of the snap plate 101c is fixedly connected to the snap block 101d and the abutment ring 101e. The inner wall of the snap block 101d is provided with a conical snap groove 101d-1. Several sets of conical snap grooves 101d-1 distributed in a circumferential direction are combined to form a clamping space J.

[0060] Among them, the inner diameter of the bottom of the tapered 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 groove A is symmetrically opened on the circumferentially arranged snap plate 101c, and the limiting groove A has a straight groove structure.

[0062] The connecting sleeve 101a is further fixedly connected with a guide rail ring 101c-1 at the connection position with the clamping plate 101c, and 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 connecting sleeve 101a is the groove bottom of the stable groove 101a-1.

[0063] The rotating clamping piece 102 is arranged in axial central symmetry, and a slant groove 102a is formed at one end edge of the rotating clamping piece 102, and a clamping groove B is formed in the middle of the rotating clamping piece 102, and a sliding column D is fixedly connected to the outer wall of the other end of the rotating clamping piece 102.

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

[0065] In use, two groups of relatively independent rotating clamping pieces 102 are arranged on the opposite outer walls of the connecting sleeve 101a, at this time the sliding column D is correspondingly and slidably placed in the sliding groove C, and the two groups of rotating clamping pieces 102 are relatively independent but are simultaneously rotated.

[0066] The inner wall of one end of the rotating clamping piece 102 away from the clamping groove B is fixedly connected with a lower buckle sliding block 102d, and the lower buckle sliding block 102d is slidably connected in the stable groove 101a-1, and the lower buckle sliding block functions to assist the stable rotation of the rotating clamping piece 102.

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

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

[0069] The sliding sleeve 101b is fixedly sleeved outside the inner abutting ring 501b, the inner diameter of the sliding sleeve 101b is equal to the outer diameter of the inner abutting 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 abutting ring 501b and the outer abutting ring 501c are respectively fixedly connected with a first spring T1 and a second spring T2 near the other end of the communication pipe 501a.

[0071] Specifically, the outer abutting ring 501c is provided with a mounting groove at one end near the inner abutting ring 501b, facilitating storage and installation of the second spring T2.

[0072] The limiting column 201 is symmetrically fixed and connected to the outer wall of one end of the guide ring 200, the inner pressure ring 202 is fixed and connected to the inner wall of the other end of the guide ring 200, and the sealing cone ring 203 is further fixed and connected to the outer wall of the inner pressure ring 202 away from the outer wall of one end of the guide ring 200, and the outer wall of the sealing cone ring 203 and the tapered clamping groove 101d-1 form the inner wall of the clamping space J.

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

[0074] Referring to Figure 12 Specifically, the inner pressure ring 202 narrows the opening of the left end of the guide ring 200 to form a large-belly small-mouth accommodating space, and the sealing cone ring 203 seamlessly connects with the end of the inner pressure ring 202.

[0075] In use, the sealing cone ring 203 is fitted and inserted into the right opening of the clamping space J, the clamping space J is in communication with the inner space of the guide ring 200 through the central hole of the sealing cone ring 203 and the inner pressure ring 202, and then is in communication with the inner part of the transmitter 500 through the communication pipe 501a.

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

[0077] The sliding groove C includes a sliding section C1 and a clamping section C2 arranged on one side of the sliding section C1, and the sliding section C1 is located on the same direction line as the limiting groove A.

[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 in the inner circumference thereof, and the sliding section C1 accommodates the sliding column D to slide horizontally in the inner part thereof.

[0079] The outer wall of the lock sleeve 300 is also symmetrically provided with a stable insertion groove 301, the stable insertion groove 301 and the sliding section C1 divide the one end of the lock sleeve 300 into four equal parts, and the stable column 101b-1 is slidingly inserted into the stable insertion groove 301.

[0080] In use, the stable column 101b-1 can be slidingly inserted into the stable insertion groove 301 to limit the circumferential rotation of the central sliding sleeve 101.

[0081] The inner wall of the other end of the lock sleeve 300 away from the opening of the sliding section C1 is fixedly connected with a blocking ring 302.

[0082] The one end of the lock sleeve 300 provided with the sliding groove C and the stable insertion groove 301 is further provided with an insertion ring 303, the insertion ring 303 includes a butt joint ring body 303a and a plug-in block 303b, the plug-in block 303b is symmetrically fixed and connected to one end of the butt joint ring body 303a, and the plug-in block 303b can be slidingly clamped to the opening of the sliding section C1.

[0083] The plug-in block 303b is inserted into the opening of the sliding section C1.

[0084] The end of the abutting ring body 303a away from the plug-in block 303b is connected with the second spring T2, and the second spring T2 gives the leftward force to the lock sleeve 300 through the plug ring 303.

[0085] The outer wall of the outer tube 601 near the extension end of the inner core 602 is fixedly connected with a clamping cone block 601a, and the outer wall of the outer tube 601 away from the extension end of the inner core 602 is further 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, referring to Figure 12 In use, the guide ring 200 in the initial state is pushed leftward 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 left end starting position of the limiting groove A, the sliding column D is located in the clamping section C2, the lock sleeve 300 is limited by the sliding column D, so that the second spring T2 is compressed, and the lock sleeve 300 has a left sliding trend.

[0088] Further, in order to clamp and fix the transmitter 500, first, the end of the outer tube 601 connected with the clamping cone block 601a is aligned with the left opening of the clamping space J, and the outer tube 601 is further pushed rightward, the clamping cone block 601a props up the clamping blocks 101d around the outside, the clamping blocks 101d drive the clamping elastic plates 101c to be propped up, the right opening of the clamping space J is enlarged, and finally the clamping cone block 601a enters the clamping space J.

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

[0090] Further, the limiting column 201 moves leftward and enters the clamping groove B, and by pushing the inclined side wall of the clamping groove B, the rotating clamping piece 102 is driven to rotate circumferentially, and the sliding column D rotates to the connecting point of the clamping section C2 and the sliding section C1, at this time the lock sleeve 300 is not limited by the clamping section C2, the second spring T2 releases and extends straight, pushes the lock sleeve 300 to move leftward, 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] Further, the leftward movement of the lock sleeve 300 drives the shell 401 to move leftward until the right end of the abutting ring 101e abuts against the inner wall of the left end of the lock sleeve 300, at which time the abutting ring 101e is accommodated in the opening of the left end of the shell 401. Since the shell 401 and the abutting ring completely cover the abutting ring 101e and the clamping block 101d, the abutting ring 101e cannot expand outward, and thus the clamping space J tightly clamps the clamping cone block 601a.

[0092] If the fixed emitter 500 is to be removed, the shell 401 is first moved rightward, the second spring T2 is compressed and shrunk, and the first spring T1 gives the end of the outer tube 601 a leftward thrust through the lock sleeve 300. When the left end of the rightward moving shell 401 slides out of the covering range of the abutting ring 101e and the clamping block 101d, the sealing cone ring 203 pushes the clamping cone block 601a on the outer tube 601 out of the clamping space J.

[0093] In this process, the lock sleeve 300 moves leftward, the slide column D moves to the joint point of the clamping section C2 and the sliding section C1, the limiting column 201 pushes the left inner wall of the clamping groove B, at which time the rotating clamping piece 102 reversely rotates, the slide column D reenters the clamping section C2, and returns to the initial state, and thus the automatic ejection of the medicine tube assembly 600 is realized.

[0094] Finally, it should be pointed out that the above detailed description of the method and the device 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 needle-free pre-filled syringe front end fixed structure, characterized by: Comprising, outer tube (601); The center sleeve (101) is provided with a plurality of sets of clamping blocks (101d) at one end, and the outer tube (601) is covered and arranged in the clamping space (J) opened in the clamping block (101d); The center sleeve (101) is provided with a guide ring (200) and a lock sleeve (300) respectively; Wherein, the guide ring (200) is pushed by the outer tube (601), and is connected and locked with the lock sleeve (300), and the lock sleeve (300) is covered outside the clamping block (101d).

2. The needle-free pre-filled launcher front end fixed structure of claim 1, wherein: It also includes a center clamping piece (100), which comprises a center sleeve (101) and a rotating clamping piece (102) rotating along the outer wall thereof; The guide ring (200) is movably arranged in the center sleeve (101), and the outer wall thereof is provided with a limiting column (201); Wherein, the rotating clamping piece (102) is arranged in the displacement direction of the limiting column (201), and the limiting column (201) can slide through the limiting groove (A) opened on the center sleeve (101) into the clamping groove (B) opened on the rotating clamping piece (102), and drive the rotating clamping piece (102) to rotate, and; The lock sleeve (300) is movably sleeved outside the center sleeve (101), and the sliding groove (C) is opened thereon; Wherein, at least part of the space of the sliding groove (C) can accommodate the sliding column (D) connected to the rotating clamping piece (102) to rotate circumferentially inside, and the remaining space of the sliding groove (C) can accommodate the sliding column (D) to slide horizontally inside.

3. The needle-free pre-filled launcher front end fixation structure of claim 2, wherein: It also includes, The docking assembly (400) comprises an outer shell (401), a center sleeve (101), a rotating clamping piece (102), a guide ring (200) and a lock sleeve (300), and the outer shell (401) is fixedly sleeved outside the outer shell (401); The transmitter (500) is provided with a connector (501) at the emitting end, the guide ring (200) is movably mounted outside the connector (501), and the center 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 inside, the outer tube (601) is mounted and fixed in the middle of the center sleeve (101), and communicates with the transmitter (500) through the connector (501).

4. The needle-free pre-filled launcher front end fixation structure of claim 3, wherein: The center sleeve (101) comprises a docking sleeve (101a) and sliding sleeves (101b) and clamping elastic plates (101c) fixed at both ends thereof, the clamping elastic plates (101c) are circumferentially distributed; The buffer gap (X) is formed between the clamping elastic plates (101c), and the sliding sleeves (101b) are symmetrically fixedly connected with stabilizing columns (101b-1) on the outer wall thereof; The other end of the clamping elastic plate (101c) is sequentially fixedly connected with a clamping block (101d) and a resisting ring (101e), a tapered clamping groove (101d-1) is opened in the inner wall of the clamping block (101d), and a plurality of sets of the tapered clamping grooves (101d-1) are circumferentially distributed.

5. The needle-free pre-filled launcher front end fixture of claim 4, wherein: The limiting groove (A) is symmetrically arranged on the clamping plate (101c) arranged in the circumferential direction; The clamping plate (101c) is further fixedly connected with the guide rail ring (101c-1) at the connection with the butt joint sleeve (101a), the guide rail ring (101c-1) and the sliding sleeve (101b) form a stable groove (101a-1), and the outer wall of the butt joint sleeve (101a) is the groove bottom of the stable groove (101a-1).

6. The needle-free pre-filled launcher front end fixture of claim 5, wherein: The rotating clamping piece (102) is arranged in axial central symmetry, an oblique groove (102a) is arranged at one end edge of the rotating clamping piece (102), the clamping groove (B) is arranged in the middle of the rotating clamping piece (102), and the sliding column (D) is fixedly connected to the outer wall of the other end of the rotating clamping piece (102); The inner wall of the rotating clamping piece (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); The inner wall of the other end of the rotating clamping piece (102) away from the clamping groove (B) is fixedly connected with a lower buckle sliding block (102d), and the lower buckle sliding block (102d) is slidably connected in the stable groove (101a-1).

7. The needleless pre-filled syringe front end fixed structure according to any one of claims 4 to 6, characterized in that: The connector (501) comprises a communication pipe (501a), an inner abutting ring (501b) and an outer abutting ring (501c), the outer diameter of the inner abutting ring (501b) is smaller than that of the outer abutting ring (501c), and the two are fixedly sleeved on the outer wall of one end of the communication pipe (501a) in a stepped manner; The sliding sleeve (101b) is fixedly sleeved on the outer wall of the inner abutting ring (501b); The inner abutting ring (501b) and the outer abutting ring (501c) are respectively fixedly connected with a first spring (T1) and a second spring (T2) near the other end of the communication pipe (501a).

8. The needle-free pre-filled launcher front end fixture of claim 7, wherein: The limiting column (201) is symmetrically fixedly connected to the outer wall of one end of the guide ring (200), the inner pressure ring (202) is fixedly connected to the inner wall of the other end of the guide ring (200), the outer wall of the sealing cone ring (203) away from the guide ring (200) is further fixedly connected with the sealing cone ring (203), and the outer wall of the sealing cone ring (203) and the tapered clamping groove (101d-1) form the inner wall abutment of the clamping space (J); The communication 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 the end of the guide ring (200) away from the sealing cone ring (203).

9. The needle-free pre-filled launcher front end fixture of claim 8, wherein: The sliding groove (C) is symmetrically arranged on the outer wall of the lock sleeve (300) in axial central symmetry, and the outer shell (401) is fixedly sleeved on the lock sleeve (300). The sliding groove (C) comprises a sliding section (C1) and a clamping section (C2) arranged on one side thereof, 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 further symmetrically provided with a stable insertion groove (301), the stable insertion groove (301) and the sliding section (C1) divide one end of the lock sleeve (300) into four equal parts, and the stable column (101b-1) is slidably inserted into the stable insertion groove (301). The lock sleeve (300) is fixedly connected with a blocking ring (302) on the inner wall of the end away from the opening of the sliding section (C1).

10. The needle-free pre-filled launcher front end fixture of claim 8 or 9, wherein: The lock sleeve (300) is further provided with an insertion ring (303) at the end provided with the sliding groove (C) and the stable insertion groove (301), the insertion ring (303) comprises a butt joint ring body (303a) and a counter-insertion block (303b), the counter-insertion block (303b) is symmetrically fixedly connected at one end of the butt joint ring body (303a), and the counter-insertion block (303b) can be matched and slidably connected to the opening of the sliding section (C1). The end of the butt joint ring body (303a) away from the counter-insertion block (303b) is connected with the second spring (T2).

11. The needle-free pre-filled launcher front end fixture of claim 10, wherein: The outer tube (601) is fixedly connected with a clamping cone block (601a) on the outer wall close to the extension end of the inner core (602), and the outer wall of the outer tube (601) away from the side of the extension end of the inner core (602) is further fixedly connected with a limiting ring (601b). The outer tube (601) can be matched and inserted into the sealing cone ring (203), and the clamping cone block (601a) can be matched and clamped into the clamping space (J).

Images