Syringe

Abstract

The utility model discloses an injector, and relates to the technical field of medical equipment, the injector comprises a needle cylinder, a needle head and a fixing assembly, the needle cylinder comprises an empty cylinder and a nipple, and the nipple is convexly arranged on one side of the empty cylinder; the needle head is connected to the outer side wall of the nipple in a sleeving mode. The fixing assembly comprises a first fixing piece and a connecting piece, the first fixing piece is arranged on the outer side wall of the empty cylinder, one end of the connecting piece is connected to the needle head, and the other end of the connecting piece is connected to the first fixing piece in a clamped mode. According to the scheme, the needle head of the injector can be prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a syringe. Background Art

[0002] Before culturing chromosome cells, the specimen needs to be inoculated with a syringe. The syringe includes a syringe and a needle. The syringe includes an empty barrel and a nipple. The nipple is convexly arranged on one side of the empty barrel, and the needle is sleeved on the outer wall of the nipple. This connection method makes it easy for the needle to fall off from the nipple of the syringe. If the needle falls off, the specimen in the syringe will spill out, causing contamination of the experimental area, thus posing certain safety hazards. Utility Model Content

[0003] The main purpose of the utility model is to provide a syringe, aiming to reinforce the needle connection of the syringe to prevent the needle from falling off the nipple of the syringe barrel, thereby avoiding safety hazards.

[0004] To achieve the above-mentioned purpose, the utility model proposes a syringe, which includes a syringe barrel, a needle and a fixing assembly, wherein the syringe barrel includes a hollow barrel and a nipple, wherein the nipple is convexly arranged on one side of the hollow barrel; the needle is sleeved on the outer side wall of the nipple; the fixing assembly includes a first fixing member and a connecting member, wherein the first fixing member is arranged on the outer side wall of the hollow barrel, one end of the connecting member is connected to the needle, and the other end is clamped to the first fixing member.

[0005] In one embodiment, a groove is formed on one side of the first fixing member facing the connecting member, the groove extends along the length direction of the hollow cylinder, a buckle arm is convexly formed on the groove wall, a buckle groove is concavely formed on the circumferential side of one end of the connecting member close to the first fixing member, one end of the connecting member is inserted into the groove, and the buckle arm is snap-connected to the buckle groove.

[0006] In one embodiment, there are multiple snap-in arms, and the multiple snap-in arms are circumferentially spaced apart on the side wall of the groove; there are multiple snap-in grooves, and the multiple snap-in grooves are circumferentially spaced apart on one end of the connecting member close to the first fixing member; and one snap-in arm is snap-connected to one snap-in groove.

[0007] In one embodiment, a guide groove is recessed in the groove wall of the groove, the guide groove and the snap-on arm are circumferentially spaced and extend along the groove depth direction of the groove, a guide portion is convexly provided on the circumferential side of the connecting piece, the guide portion and the snap-on arm are circumferentially spaced, and the guide portion is inserted and limited to the guide groove.

[0008] In one embodiment, the guide grooves are provided in plurality and are circumferentially spaced apart on the side wall of the groove, the guide portions are provided in plurality and are circumferentially spaced apart on the circumferential side of the connector, and one guide portion is inserted and limited to one guide groove.

[0009] In one embodiment, a limiting groove is recessed on the outer wall of the needle, and a fixing ring is provided at one end of the connector close to the needle, and the fixing ring is sleeved in the limiting groove.

[0010] In one embodiment, the first fixing member and the hollow cylinder are provided as an integrated structure.

[0011] In one embodiment, the connecting member is a rod structure, and the syringe also includes a falling-off assembly, which includes a second fixing member and a sliding member, the second fixing member is arranged on the outer side wall of the empty cylinder, and is spaced apart from the first fixing member along the length direction of the empty cylinder, the sliding member is slidably connected to the second fixing member along the length direction of the empty cylinder, and the sliding member is provided with a pushing portion protruding from one side of the connecting member, and the pushing portion and one end of the connecting member are pressed and fitted to move the connecting member as a whole in a direction away from the second fixing member.

[0012] In one embodiment, a sliding groove is provided on a side of the second fixing member facing the first fixing member, the sliding member is slidably arranged in the sliding groove, and a toggle portion is convexly provided on a side of the sliding member away from the empty tube, and the toggle portion is moved toward the connecting member by toggling the toggle portion so that the pushing portion is pressed against one end of the connecting member.

[0013] In one embodiment, a plurality of anti-slip stripes are convexly provided on the outer surface of the shifting portion, and the plurality of anti-slip stripes are arranged at intervals along the length direction of the hollow cylinder.

[0014] In the technical solution of the utility model, the needle is sleeved on the outer wall of the syringe nipple, and a first fixing part and a connecting part are additionally provided. One end of the connecting part is connected to the needle, and the other end is buckled to the first fixing part, thereby reinforcing the connection of the needle, which is beneficial to prevent the needle from falling off from the syringe nipple, avoid the injection liquid from overflowing from the liquid storage cavity of the empty barrel, and improve the operating experience of the staff.

[0015] In addition, when removing the needle, since one end of the connecting piece is buckled to the first fixing piece, after loosening the connecting piece and the fixing piece, the needle can be removed from the nipple by pulling one end of the connecting piece up and down, thereby avoiding the safety hazards caused by directly removing the needle by hand, which is conducive to further improving the operating experience of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of a syringe provided by the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the structure of the needle and syringe;

[0019] Figure 3 for Figure 1 A schematic diagram of a partial structure of an embodiment of a first fixing member;

[0020] Figure 4 for Figure 1 A schematic diagram of the top view of the structure of an embodiment of a middle sliding member

[0021] Figure 5 This is a structural schematic diagram of an embodiment of a storage device provided by the utility model.

[0022] Description of Figure Numbers:

[0023] 10. Syringe; 1. Syringe; 11. Empty cylinder; 111. Liquid storage chamber; 13. Nipple; 15. Push rod; 151. Pumping and pressing part; 153. Rod body; 3. Needle; 31. Needle plug; 33. Tube body; 5. Fixing assembly; 51. First fixing part; 511. Groove; 513. Guide groove; 53. Connecting part; 531. Fixing ring; 7. Dropping assembly; 71. Second fixing part; 73. Sliding part; 731. Toggle part; 7311. Anti-slip stripe; 733. Pushing part; 8. Storage device; 81. Storage box; 82. Inclined plate; 83. Conveying plate; 84. Rotating shaft; 85. Baffle.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0028] Before culturing chromosome cells, the specimen needs to be inoculated with a syringe. The syringe includes a syringe and a needle. The syringe includes an empty barrel and a nipple. The nipple is convexly arranged on one side of the empty barrel, and the needle is sleeved on the outer wall of the nipple. This connection method makes it easy for the needle to fall off from the nipple of the syringe. If the needle falls off, the specimen in the syringe will spill out, causing contamination of the experimental area, thus posing certain safety hazards.

[0029] In order to solve the above problems, the present invention proposes a syringe 10, which aims to reinforce the connection of the needle 3 of the syringe 10 to prevent the needle 3 from falling off the nipple 13 of the syringe 1, thereby avoiding safety hazards.

[0030] Reference Figures 1 to 3 In one embodiment of the utility model, the syringe 10 includes a syringe 1, a needle 3 and a fixing assembly 5, the syringe 1 includes an empty barrel 11 and a nipple 13, the nipple 13 is protruding on one side of the empty barrel 11; the needle 3 is sleeved on the outer wall of the nipple 13; the fixing assembly 5 includes a first fixing member 51 and a connecting member 53, the first fixing member 51 is arranged on the outer wall of the empty barrel 11, one end of the connecting member 53 is connected to the needle 3, and the other end is clamped to the first fixing member 51.

[0031] The syringe 10 can be used in medical fields such as specimen inoculation, etc. The syringe 1 also includes a push rod 15. Driven by the rod body 153, the pumping and pressing part 151 reciprocates along the depth direction of the liquid storage cavity 111, thereby realizing the operation of pumping and discharging liquid from the syringe 1.

[0032] The needle 3 includes a needle plug 31 and a tube body 33 . The tube body 33 is inserted through one end of the needle plug 31 and is sleeved and connected to the outside of the nipple 13 of the syringe 1 through the other end of the needle plug 31 .

[0033] In the technical solution of the present utility model, the needle 3 is sleeved on the outer wall of the nipple 13 of the syringe 1, and a first fixing member 51 and a connecting member 53 are additionally provided. One end of the connecting member 53 is connected to the needle 3, and the other end is buckled to the first fixing member 51, thereby reinforcing the connection of the needle 3, which is beneficial to prevent the needle 3 from falling off from the nipple 13 of the syringe 1, avoiding the injection liquid from overflowing from the liquid storage cavity 111 of the empty barrel 11, and improving the operating experience of the staff.

[0034] In addition, when removing the needle 3, since one end of the connecting piece 53 is buckled on the first fixing piece 51, after loosening the connecting piece 53 and the fixing piece, the needle 3 can be removed from the nipple 13 by pulling one end of the connecting piece 53 up and down, thereby avoiding the safety hazard caused by directly removing the needle 3 by hand, which is conducive to further improving the operating experience of the staff.

[0035] Optionally, in order to achieve the overall disassembly of the fixing assembly 5, the first fixing member 51 is connected to the side wall of the empty barrel 11 by bonding, and the syringe 10 also includes a cutter assembly, which is spaced apart from the first fixing member 51 along the length direction of the empty barrel 11. The cutter assembly is provided with a reciprocating cutter portion, and the cutter portion is attached to the side wall of the empty barrel 11. By cutting the cutter portion toward the bonding surface between the first fixing member 51 and the empty barrel 11, the first fixing member 51 can be fallen off from the side wall of the empty barrel 11 as a whole, thereby facilitating the subsequent further disassembly of the needle 3.

[0036] Reference Figures 1 to 3 In one embodiment of the utility model, a groove 511 is formed on one side of the first fixing member 51 facing the connecting member 53, and the groove 511 extends along the length direction of the hollow cylinder 11. A buckle arm is convexly formed on the groove wall of the groove 511. A buckle groove is concavely formed on the circumferential side of one end of the connecting member 53 close to the first fixing member 51. One end of the connecting member 53 is inserted into the groove 511, and the buckle arm is snap-connected to the buckle groove.

[0037] In this embodiment, when one end of the connecting member 53 is inserted along the groove depth direction of the groove 511, the buckle groove of the connecting member 53 and the buckle arm of the groove wall of the groove 511 are buckled and matched, thereby realizing the buckle connection between the connecting member 53 and the first fixing member 51. For example, similar to the buckle connection method of the backpack strap, by pressing the buckle arm formed on the side wall of the groove 511, the first fixing member 51 and the connecting member 53 can be easily assembled and disassembled.

[0038] Reference Figures 1 to 3 In one embodiment of the utility model, there are multiple snap-in arms, and the multiple snap-in arms are circumferentially spaced apart on the side wall of the groove 511; there are multiple snap-in grooves, and the multiple snap-in grooves are circumferentially spaced apart on one end of the connecting member 53 close to the first fixing member 51; and one snap-in arm is snap-connected to one snap-in groove.

[0039] In this embodiment, by increasing the number of surrounding sides of the snap-in groove of the connecting piece 53 and the snap-in arm of the groove wall of the groove 511 respectively, and making a snap-in arm snap-connected to a snap-in groove, it is helpful to increase the connection strength between the snap-in arm and the snap-in groove, thereby further preventing the needle 3 from falling off.

[0040] Optionally, a plurality of snap-in grooves and snap-in arms are provided along the length direction of the hollow cylinder 11, so that the connector 53 can be snapped into the groove 511 at different insertion depths, which is beneficial for the groove 511 to adapt to different lengths of the connector 53, thereby ensuring that one end of the connector 53 pulls and fixes the needle 3 within a certain range of travel.

[0041] Reference Figures 1 to 3 In one embodiment of the utility model, a guide groove 513 is recessed in the groove wall of the groove 511, and the guide groove 513 and the snap-on arm are circumferentially spaced and extend along the groove depth direction of the groove 511. A guide portion is convexly provided on the circumferential side of the connecting piece 53, and the guide portion and the snap-on arm are circumferentially spaced, and the guide portion is inserted and limited to the guide groove 513.

[0042] In this embodiment, when the connecting member 53 is inserted along the groove 511, the guide portion of the connecting member 53 and the guide groove 513 of the groove 511 are limited and matched, thereby playing a guiding role for the end of the connecting member 53 inserted into the groove 511, facilitating the alignment and snap connection of the connecting member 53 and the first fixing member 51, and improving the assembly efficiency of the connecting member 53 and the first fixing member 51.

[0043] Reference Figures 1 to 3In one embodiment of the utility model, there are multiple guide grooves 513, and multiple guide grooves 513 are circumferentially spaced apart on the side wall of the groove 511; there are multiple guide portions, and multiple guide portions are circumferentially spaced apart on the circumferential side of the connecting member 53; and one guide portion is inserted and limited to one guide groove 513.

[0044] In this embodiment, by increasing the number of the circumferential sides of the guide groove 513 and the guide portion respectively, and making a guide portion and a guide groove 513 limitedly cooperate along the length direction of the hollow cylinder 11, it is further facilitated to further facilitate the alignment and snap connection of the connecting member 53 and the first fixing member 51, and further improve the assembly efficiency of the connecting member 53 and the first fixing member 51.

[0045] Reference Figures 1 to 3 In one embodiment of the utility model, a limiting groove is recessed on the outer wall of the needle 3, and a fixing ring 531 is provided at one end of the connecting member 53 close to the needle 3, and the fixing ring 531 is sleeved in the limiting groove.

[0046] The fixing ring 531 may be an elastic ring, and one end of the connecting member 53 is elastically sleeved in the limiting groove through elastic extrusion of the elastic ring.

[0047] In this embodiment, one end of the connecting member 53 is sleeved in the limiting groove of the needle 3 through the fixing ring 531, and the two opposite groove walls of the limiting groove can play an axial limiting role on the fixing ring 531, which is helpful to prevent one end of the connecting member 53 from moving downward, thereby avoiding the needle 3 from falling off.

[0048] Reference Figures 1 to 3 In one embodiment of the present invention, the first fixing member 51 and the empty cylinder 11 are arranged as an integrated structure.

[0049] In this embodiment, the first fixing member 51 and the empty cylinder 11 are integrally formed, which is beneficial to enhance the overall connection strength between the first fixing member 51 and the empty cylinder 11, reduce the assembly steps of the first fixing member 51 and the empty cylinder 11, and prevent the first fixing member 51 from falling off due to multiple buckling of the first fixing member 51 with the connecting member 53.

[0050] Reference Figures 1 to 4In one embodiment of the utility model, the connecting member 53 is a rod body 153 structure, and the syringe 10 also includes a falling-off assembly 7, which includes a second fixing member 71 and a sliding member 73. The second fixing member 71 is arranged on the outer side wall of the empty cylinder 11, and is spaced apart from the first fixing member 51 along the length direction of the empty cylinder 11. The sliding member 73 is slidably connected to the second fixing member 71 along the length direction of the empty cylinder 11. The sliding member 73 is convexly provided with a pushing portion 733 toward one side of the connecting member 53. The pushing portion 733 and one end of the connecting member 53 are pressed and matched to make the connecting member 53 move as a whole in a direction away from the second fixing member 71.

[0051] In this embodiment, since the connecting member 53 is integrally slidably arranged on the second fixing member 71, the connecting member 53 can be pushed to slide manually or by driving, so that the pushing portion 733 of the sliding member 73 pushes the connecting member 53 as a whole, so that the connecting member 53 is first disengaged from the groove 511, and then the connecting member 53 moves in the opposite direction of the groove depth of the groove 511, so that the end of the connecting member 53 connected to the needle 3 is dropped, thereby facilitating the removal of the needle 3 and avoiding the safety hazard caused by directly manually removing the needle 3.

[0052] In an embodiment of a sliding fit structure, the second fixing member 71 is a convex strip formed by a protruding projection on the outer wall of the hollow cylinder 11, and the boss extends along the length direction of the hollow cylinder 11. The outer wall of the sliding member 73 is recessed with a sliding groove. By inserting the convex strip into the sliding groove of the sliding member 73, the sliding member 73 can slide along the length direction of the hollow cylinder 11, and the connecting member 53 can be pushed by the pushing portion 733.

[0053] Reference Figures 1 to 4 In one embodiment of the utility model, a sliding groove is provided on the side of the second fixing member 71 facing the first fixing member 51, and the sliding member 73 is slidably arranged in the sliding groove. A toggle portion 731 is convexly provided on the side of the sliding member 73 away from the empty cylinder 11, and the toggle portion 731 is moved toward the direction close to the connecting member 53 by toggling the toggle portion 731 so that the pushing portion 733 is pressed against one end of the connecting member 53.

[0054] In this embodiment, the sliding member 73 is directly driven to slide by manual pushing, and the pushing portion 733 of the sliding member 73 pushes one end of the connecting member 53, so that the connecting member 53 drives the needle 3 to fall off, without the aid of other auxiliary tools, which facilitates the disassembly of the needle 3 and is beneficial to the disassembly efficiency.

[0055] Reference Figures 1 to 4In one embodiment of the utility model, a plurality of anti-slip stripes 7311 are convexly provided on the outer surface of the shifting portion 731 , and the plurality of anti-slip stripes 7311 are arranged at intervals along the length direction of the empty tube 11 .

[0056] In this embodiment, when the outer surface of the toggle part 731 is pressed and pushed by the fingers, in order to prevent the fingers from being too smooth and making it impossible to push the toggle part 731 normally, a plurality of anti-slip stripes 7311 are convexly provided on the outer surface of the toggle part 731. The anti-slip stripes 7311 increase the sliding friction between the fingers and the outer surface of the toggle part 731, thereby ensuring the normal toggle drive of the sliding member 73, thereby realizing the normal disassembly of the needle 3 of the syringe 10.

[0057] Reference Figure 5 The utility model further proposes a storage device 8, which is used for storing and taking out syringes 10. The storage device 8 includes a storage box 81, an inclined plate 82, a conveying plate 83, a rotating shaft 84 and a baffle 85. The inclined plates 82 are arranged in two groups, and the two groups of inclined plates 82 are arranged inside the storage box 81, and the two groups of inclined plates 82 are arranged obliquely, and the two groups of inclined plates 82 are arranged symmetrically, and the two groups of inclined plates 82 are fixedly connected to the inner side wall of the storage box 81. The conveying plates 83 are arranged in two groups, and the two groups of conveying plates 83 are arranged inside the storage box 81, and one end of the two groups of conveying plates 83 is respectively fixedly connected to the lower end of the two groups of inclined plates 82, and the two groups of conveying plates 83 are arranged obliquely, and the two groups of conveying plates 83 are parallel to each other, and the two groups of conveying plates 83 are fixedly connected to the inner side wall of the storage box 81.

[0058] The rotating shaft 84 is arranged inside the storage box 81, and an opening is opened on one side of the storage box 81. The rotating shaft 84 is arranged on one side of the opening, and both ends of the rotating shaft 84 are fixedly connected to the inner side wall of the storage box 81. The baffle 85 is sleeved on the rotating shaft 84, and the baffle 85 is rotatably connected to the rotating shaft 84. One end of the baffle 85 is arranged inside the storage box 81, and the other end of the baffle 85 is arranged outside the storage box 81, and the end of the baffle 85 located inside the storage box 81 is in contact with one end of the lower group of the two groups of inclined plates 82.

[0059] In any of the above schemes, it is preferred that a pressure block is provided below one end of the baffle 85 located inside the storage box 81, and the pressure block is fixedly connected to the bottom end of the baffle 85, and a limiting plate is provided on one end of the baffle 85 located outside the storage box 81, and the limiting plate is fixedly connected to the top surface of the baffle 85, and the limiting plate is vertically arranged to the baffle 85.

[0060] In any of the above schemes, it is preferred that the storage device 8 also includes a needle 3 storage box 81 and an alcohol cotton pad storage box 81, and an installation port is opened on the side wall of the storage box 81, and the installation port is arranged in two groups, and the two groups of the installation ports are arranged below the two groups of the conveying plates 83, and the needle 3 storage box 81 and the alcohol cotton pad storage box 81 are respectively arranged inside the two groups of the installation ports.

[0061] In summary, in the syringe 10 of the embodiment of the utility model, the needle 3 is reinforced by the connection of the connecting piece 53, which is conducive to preventing the needle 3 from falling off. In addition, to facilitate the removal of the needle 3, the shedding component 7 pushes one end of the connecting piece 53, so that the connecting piece 53 moves downward as a whole, and drives the needle 3 to fall off downward, thereby facilitating the removal of the needle 3. Therefore, the needle 3 of the syringe 10 of the embodiment of the utility model is not easy to fall off, and the needle 3 is relatively simple to disassemble, which is conducive to meeting the use needs of the staff.

[0062] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A syringe, characterized in that: The syringe comprises: A syringe, comprising a hollow barrel and a nipple, wherein the nipple is convexly arranged on one side of the hollow barrel; A needle, the needle being sleeved on the outer wall of the nipple; and The fixing assembly comprises a first fixing member and a connecting member, wherein the first fixing member is arranged on the outer side wall of the hollow cylinder, one end of the connecting member is connected to the needle, and the other end is clamped to the first fixing member.

2. The syringe according to claim 1, characterized in that A groove is provided on one side of the first fixing member toward the connecting member, and the groove extends along the length direction of the hollow cylinder. A buckle arm is convexly provided on the groove wall of the groove. A buckle groove is concavely provided on the circumferential side of one end of the connecting member close to the first fixing member. One end of the connecting member is inserted into the groove, and the buckle arm is snap-connected to the buckle groove.

3. The syringe according to claim 2, characterized in that There are multiple snap-in arms, which are circumferentially spaced apart on the side wall of the groove; there are multiple snap-in grooves, which are circumferentially spaced apart on one end of the connecting member close to the first fixing member; and one snap-in arm is snap-connected to one snap-in groove.

4. The syringe according to claim 2, characterized in that A guide groove is recessed on the groove wall of the groove, and the guide groove and the snap-on arm are circumferentially spaced and extend along the groove depth direction of the groove. A guide portion is convexly provided on the circumferential side of the connecting piece, and the guide portion and the snap-on arm are circumferentially spaced, and the guide portion is inserted and limited to the guide groove.

5. The syringe according to claim 4, characterized in that There are multiple guide grooves, which are circumferentially spaced apart on the side wall of the groove; there are multiple guide parts, which are circumferentially spaced apart on the circumferential side of the connecting piece; and one guide part is inserted and limited to one guide groove.

6. The syringe according to any one of claims 1 to 5, characterized in that The outer wall of the needle head is concavely provided with a limiting groove, and the end of the connecting piece close to the needle head is provided with a fixing ring, and the fixing ring is sleeved in the limiting groove.

7. The syringe according to any one of claims 1 to 5, characterized in that The first fixing member and the empty cylinder are arranged as an integrated structure.

8. The syringe according to any one of claims 2 to 5, characterized in that The connecting piece is a rod structure, and the syringe also includes a falling-off assembly, which includes a second fixing piece and a sliding piece. The second fixing piece is arranged on the outer side wall of the empty cylinder and is spaced apart from the first fixing piece along the length direction of the empty cylinder. The sliding piece is slidably connected to the second fixing piece along the length direction of the empty cylinder. The sliding piece is protruded with a pushing part on one side of the connecting piece, and the pushing part is pressed and fitted with one end of the connecting piece to move the connecting piece as a whole in a direction away from the second fixing piece.

9. The syringe according to claim 8, characterized in that The second fixing member is provided with a sliding groove on one side facing the first fixing member, the sliding member is slidably arranged in the sliding groove, and the sliding member is provided with a toggle portion on one side away from the empty tube, and the toggle portion is moved toward the connecting member by toggling the toggle portion so that the pushing portion is pressed against one end of the connecting member.

10. The syringe according to claim 9, characterized in that The outer surface of the shifting part is convexly provided with a plurality of anti-slip stripes, and the plurality of anti-slip stripes are arranged at intervals along the length direction of the empty tube.

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