WO2022041524A1 - 针管结构及具有其的注射器 - Google Patents

针管结构及具有其的注射器 Download PDF

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Publication number
WO2022041524A1
WO2022041524A1 PCT/CN2020/131499 CN2020131499W WO2022041524A1 WO 2022041524 A1 WO2022041524 A1 WO 2022041524A1 CN 2020131499 W CN2020131499 W CN 2020131499W WO 2022041524 A1 WO2022041524 A1 WO 2022041524A1
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WO
WIPO (PCT)
Prior art keywords
liquid
needle
push rod
needle tube
sealing member
Prior art date
Application number
PCT/CN2020/131499
Other languages
English (en)
French (fr)
Inventor
杨德怡
Original Assignee
汕头华尔怡医疗器械有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 汕头华尔怡医疗器械有限公司 filed Critical 汕头华尔怡医疗器械有限公司
Publication of WO2022041524A1 publication Critical patent/WO2022041524A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/3129—Syringe barrels
    • A61M5/3134—Syringe barrels characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M2005/5006—Having means for destroying the syringe barrel, e.g. by cutting or piercing

Definitions

  • the present application relates to the field of medical devices, in particular, to a needle tube structure and a syringe having the same.
  • Syringe is one of the most basic medical devices. In order to reduce the spread of blood-borne diseases among patients, countries around the world have legislated to promote the use of disposable safety syringes.
  • common disposable syringes generally have defects such as being reusable, having no safety device, and exposing the needle after injection. On the one hand, it is easy to be used by criminals or drug addicts. Repeated use can easily cause virus spread and cross infection.
  • the needles of the syringes are easy to stab medical staff during the collection and processing process, which in turn leads to the spread of hepatitis B, hepatitis C, AIDS and other diseases and causes the infection of medical staff. exposed and stabbed.
  • the main purpose of the present application is to provide a needle tube structure and a syringe having the same, so as to solve the problem that the exposed needle of the syringe in the prior art easily stabs the staff.
  • a needle tube structure comprising: a casing, the casing has an injection cavity; a push rod, the push rod has an escape channel, and the push rod is movably disposed in the injection cavity; a sealing At least part of the seal is installed in the avoidance channel; wherein, the housing is provided with a connecting part for detachably connecting with the needle structure of the syringe, the seal has a connecting head located outside the avoidance channel, and the connecting head is used for connecting with the needle
  • the liquid-through core of the structure is connected to drive the liquid-through core to be retracted into the avoidance channel.
  • the seal has an initial state and a retracted state.
  • the seal When the seal is in the initial state, the seal is positioned on the push rod, and the connecting head is located outside the escape channel; when the seal is in the retracted state, the seal and the pass
  • the liquid core is located in the avoidance channel; the inner wall of the avoidance channel is provided with a stop flange, and the seal is provided with a limit part matched with the stop flange, so as to pass the limit between the stop flange and the limit part.
  • the position fit locates the seal in the initial state, and moves the seal to the retracted state after the limiting portion overcomes the blocking effect of the stop flange under the action of external force.
  • stopper flange protrudes from the inner wall surface of the main channel of the avoidance channel, and the stopper flange extends along the extension direction of the avoidance channel.
  • the needle tube structure also includes: an elastic member, a stop step is arranged in the avoidance channel, when the sealing member is in the initial state, one end of the elastic member is in contact with the stop step, and the other end of the elastic member and the limiting portion are close to the needle head.
  • One side of the structure abuts; and/or a sealing ring, the sealing ring is sleeved on the push rod and located between the push rod and the casing, so as to seal the gap between the push rod and the casing.
  • the stop flange has a stop surface
  • the stop part has a stop surface
  • the stop surface contacts the stop surface; wherein, the stop surface is a part of the surface of the sphere structure, and the stop surface is in contact with the stop surface.
  • the blocking surface is matched with the limiting surface.
  • the needle tube structure further includes: a positioning seat, the positioning seat is arranged on the push rod, the positioning seat is provided with a first clamping portion, and the sealing member is provided with a second clamping portion; the sealing member and the needle structure are retracted to avoid After entering the channel, the first clamping part and the second clamping part are clamped to position the seal.
  • one of the first clamping portion and the second clamping portion is a clamping groove
  • the other of the first clamping portion and the second clamping portion is a buckle matched with the clamping groove
  • the sealing member is provided with a positioning hole
  • the positioning seat is provided with a positioning plug; after the sealing member and the liquid-passing core are retracted into the escape channel, the positioning plug is inserted into the positioning hole.
  • the first clamping part is a clamping slot
  • the clamping slot is arranged on one side of the positioning plug
  • the second clamping part is a buckle matched with the clamping slot
  • at least part of the buckle is located in the positioning hole
  • the buckle is an elastic sheet structure, one end of the elastic sheet structure is connected with the main body of the seal, and the other end of the elastic sheet structure is used to be clamped into the clamping groove; and/or the clamping groove is an annular groove, and the buckles are multiple , a plurality of clips are arranged around the clip slot to be respectively clipped into the clip slot.
  • the outer surface of the connecting head is at least a part of a spherical surface; and/or the connecting portion is a threaded hole or an external thread, so that the housing and the needle structure are threadedly connected; and/or the push rod has a pushing portion, and the pushing portion is arranged on the push portion.
  • One end of the rod close to the needle structure is used to push the liquid-proof member of the needle structure outside the liquid-passing core to move through the pushing part, so that the liquid-passing core is separated from the mounting seat of the needle structure.
  • a syringe including a needle structure and a needle tube structure, the needle tube structure and the needle tube structure are detachably connected, and the needle tube structure is the above-mentioned needle tube structure.
  • the needle structure includes: a mounting seat, which is provided with a mounting seat, and the mounting seat is detachably connected with the casing of the syringe; ; Liquid-proof part, the liquid-proof part is arranged between the inner wall of the mounting seat and the outer wall of the liquid-passing core, so as to seal between the mounting seat and the liquid-passing core through the liquid-proof part; wherein, the liquid-proof part and the liquid-passing core limit Position matching, so that the liquid-through core is positioned on the mounting seat through the liquid-proof part, and the liquid-through core is disengaged from the liquid-proof part and the mounting seat under the action of external force, so that the needle is retracted into the escape channel of the push rod of the needle tube structure .
  • the technical solution of the present application is applied, including: a casing, the casing has an injection cavity; a push rod, the push rod has an avoidance channel, and the push rod is movably arranged in the injection cavity; a seal, the seal is installed in the avoidance channel; wherein,
  • the casing is provided with a connecting portion for detachably connecting with the needle structure of the syringe, the sealing member has a connecting head located outside the avoidance channel, and the connecting head is used for connecting with the liquid-through core of the needle structure to drive the liquid-through core to retract to the
  • the avoidance channel solves the problem that the needle of the syringe easily stabs the medical staff during the collection and processing process, which in turn leads to the spread of hepatitis B, hepatitis C, AIDS and other diseases and causes the infection of medical staff.
  • FIG. 1 shows a schematic structural diagram of an embodiment of the syringe of the present application
  • FIG. 2 shows a schematic structural diagram of the sealing member of the needle tube structure of the syringe of the present application in a retracted state
  • FIG. 3 shows a schematic structural diagram of the seal of the needle tube structure of the syringe of the present application in an initial state
  • FIG. 4 shows a schematic structural diagram of an embodiment of the sealing member of the needle tube structure of the present application
  • FIG. 5 shows a schematic structural diagram of an embodiment of the housing of the needle tube structure of the present application
  • Figure 6 shows a bottom view of the housing of the needle structure in Figure 5;
  • FIG. 7 shows a schematic structural diagram of an embodiment of the push rod of the needle tube structure of the present application.
  • Fig. 8 shows the top view of the push rod of the needle tube structure in Fig. 7;
  • FIG. 9 shows a schematic structural diagram of an embodiment of the positioning seat of the needle tube structure of the present application.
  • FIG. 10 shows a schematic structural diagram of an embodiment of the needle structure of the syringe of the present application
  • FIG. 11 shows a schematic structural diagram of an embodiment of the mounting seat of the needle structure of the syringe of the present application
  • Figure 12 shows the internal structure diagram of the mounting seat of the needle structure in Figure 11;
  • FIG. 13 shows a schematic structural diagram of an embodiment of the liquid-passing wick of the needle structure of the syringe of the present application.
  • FIG. 14 shows the internal structure diagram of the fluid-passing wick of the needle structure in FIG. 13 .
  • Needle structure 11. Mounting seat; 111. Mounting cavity; 2. Shell; 21. Connecting part; 22. Injection cavity; 3. Liquid core; 31. First locking part; 321. Locking groove; 33, fluid channel; 35, first core body segment; 36, second core body segment; 37, third core body segment; 371, elastic groove; 4, liquid-proof part; 5, push rod; 51, avoidance channel; 52, stop flange; 521, stop surface; 53, stop step; 54, push part; 6, seal; 61, connector; 62, limit part; 621, limit surface; 63, second Snap part; 64, positioning hole; 65, limit protrusion; 66, step; 7, sealing ring; 8, elastic part; 9, positioning seat; 91, first snap part; 92, positioning plug; 10, Needle structure.
  • the present application provides a needle tube structure, comprising: a housing 2, the housing 2 has an injection cavity 22; a push rod 5, the push rod 5 has an escape channel 51, and the push rod 5 is movably disposed in the injection cavity 22; a seal 6. At least part of the sealing member 6 is installed in the avoidance channel 51; wherein, the housing 2 is provided with a connecting portion 21 for detachably connecting with the needle structure 1 of the syringe, and the sealing member 6 has a connecting head located outside the avoidance channel 51 61.
  • the connector 61 is used to connect with the liquid-passing core 3 of the needle structure 1, so as to drive the liquid-passing core 3 to retract into the avoidance channel 51, which solves the problem that the needle of the syringe is easy to stab medical staff during the collection and processing process, thereby causing The spread of hepatitis B, hepatitis C, AIDS and other diseases has caused the problem of medical staff infection.
  • a push rod 5 is installed in the housing 2 of the needle tube structure 10 of the present application, and an injection cavity 22 is provided inside the housing 2 , and the injection cavity 22 is used for accommodating the desired injection.
  • the function of the push rod 5 is to push the injection liquid in the injection cavity 22 out of the injection cavity 22 to complete the injection.
  • the push rod 5 is a shell structure.
  • an escape channel 51 is formed inside the push rod 5, and a seal 6 is installed in the escape channel 51. At least part of the seal 6 is installed in the escape channel 51, and is sealed The piece 6 can slide in the escape channel 51 .
  • a connecting portion 21 is provided at the outlet of the housing 2 for connecting with the needle structure 1 .
  • the connecting portion is an internal thread formed in the inner wall of the housing 2
  • the needle structure 1 is provided with an external thread matching the internal thread on the inner wall of the housing 2 .
  • the connector 61 on the seal 6 takes the liquid-passing core 3 connected to it away from the needle structure 1 and retracts into the avoidance channel 51 At this time, the needle installed in the liquid-through core is also retracted into the avoidance channel 51 along with the liquid-through core 3, and the needle retracted into the avoidance channel 51 is no longer exposed to the outside of the syringe.
  • the sealing member 6 in the needle tube structure 10 of the present embodiment has an initial state and a retracted state.
  • the sealing member 6 When the sealing member 6 is in the initial state, the sealing member 6 is positioned on the push rod 5 , and the connecting head 61 It is located on the outside of the avoidance channel 51; when the seal 6 is in the retracted state, the seal 6 and the liquid-passing core 3 are located in the avoidance channel 51; the inner wall of the avoidance channel 51 is provided with a stop flange 52, and the seal 6 is provided with There is a limit portion 62 matched with the stop flange 52, so that the sealing member 6 can be positioned in the initial state through the limit cooperation between the stop flange 52 and the limit portion 62, and the external force is applied to the limit portion 62. After overcoming the blocking effect of the blocking flange 52 under the action of the sealing element 6, the sealing member 6 is moved to the retracted state.
  • the sealing member 6 of the needle tube structure 10 of this embodiment has an initial state and a retracted state.
  • the initial state as shown in FIGS. 1 and 3 , the sealing member 6 is positioned on the push rod 5 , and the connecting head 61 is positioned in the avoidance channel 51 .
  • This structure allows the connector 61 to fully protrude from the push rod 5, so as to be combined with the liquid-through core 3 in the needle structure 1, and the connection head 61 and the liquid-through core will not be affected by the structure of the push rod 5 itself.
  • the connection of 3 causes interference.
  • the sealing member 6 and the liquid-passing core 3 are located in the avoidance channel 51 , and the sealing member 6 and the liquid-passing core 3 are retracted and avoided in the avoidance channel 51 .
  • the needle in 3 is retracted into the syringe and will not be exposed outside the syringe, because the length of the needle is set according to different injection needs.
  • the sealing member 6 and the liquid-passing core 3 need to be located in the avoidance channel 51 to avoid leakage. Guarantees the retraction stroke of the needle.
  • a stop flange 52 is provided on the inner wall of the avoidance channel 51, and the seal 6 is provided with The stop flange 52 is matched with the limit portion 62 , and the limit match between the stop flange 52 and the limit portion 62 is matched.
  • the stop flange 52 is positioned in the initial state by limiting the cooperation with the limiting portion 62 , thereby limiting the tendency of the sealing member 6 to move into the avoidance channel 51 .
  • the resistance received is smaller than that of the stop flange 52 restricting the seal 6 from retracting into the avoidance channel 51.
  • the resistance generated in cooperation with the limiting portion 62 ensures that the sealing member 6 is always in the initial state before the connection head 61 of the sealing member 6 is connected with the liquid-passing core 3 of the needle structure 1 .
  • the stop flange 52 protrudes from the inner wall surface of the main channel of the avoidance channel 51 , and the stop flange 52 is along the extension direction of the avoidance channel 51 . extend.
  • the stopper flange 52 is arranged to protrude from the inner wall surface of the main channel of the avoidance channel 51, and the structure extending along the extension direction of the avoidance channel 51 can position the seal 6 at the initial position through the limit cooperation with the limit part 62. In the state, a narrower channel section of the avoidance channel 51 is formed at the stop flange 52 . When the seal 6 is retracted into the avoidance channel 51 and passes through the stop flange 52, the stop flange 52 can further limit the position of the seal 6 to the other end of the stop flange 52, thereby restricting the seal 6 in the limit and avoidance channel 51.
  • the needle tube structure 10 further includes: an elastic member 8 , a stop step 53 is provided in the avoidance channel 51 , when the sealing member 6 is in the initial state, the elastic member 8 One end of the elastic member 8 is in contact with the stop step 53, and the other end of the elastic member 8 is in contact with the side of the limiting portion 62 close to the needle structure 1; and/or the sealing ring 7, the sealing ring 7 is sleeved on the push rod 5 and located at between the push rod 5 and the casing 2 to seal the gap between the push rod 5 and the casing 2 .
  • an elastic member 8 is provided.
  • one end of the elastic member 8 abuts against the stopper step 53
  • the other end of the elastic member 8 abuts against the side of the limiting portion 62 close to the needle structure 1 .
  • the push rod 5 is forced to push the connector 61 on the seal 6 to connect with the liquid-through core in the needle structure 1
  • the stop flange 52 pushes the seal 6 to squeeze the elastic piece 8 against the stop step 53 and the limit In the portion 62, the elastic member 8 is compressed to generate a resilient force.
  • the resilient member 8 releases the resilient force to push back the sealing member 6 to avoid the escape channel 51 , so that the sealing member 6 reach the retracted state.
  • the needle tube structure 10 of this embodiment is provided with a sealing ring 7 , which is sleeved on the push rod 5 and located between the push rod 5 and the casing 2 .
  • the stopper flange 52 has a stopper surface 521
  • the stopper portion 62 has a stopper surface 621 .
  • the stop surface 521 is in contact with the stop surface 621 ;
  • the stop surface 621 is a part of the surface of the spherical structure, and the stop surface 521 is matched with the stop surface 621 .
  • the stop flange 52 has a stop surface 521
  • the limiting portion 62 has a stop surface 621.
  • the stop surface 521 is in contact with the stop surface 621, so that the seal 6 is in contact with the stop surface 621. 6 for positioning.
  • the limit surface 621 is a part of the surface of the sphere structure, and the stop surface 521 cooperates with the limit surface 621.
  • the contact area and contact angle between the part surface of the sphere of the limit surface 621 and the stop surface 521 can be adjusted to achieve Adjust the resistance between the limiting portion 62 and the stop flange 52 to ensure that when the connecting head 61 on the sealing member 6 is connected with the liquid-through core 3 of the needle structure 1 through thrust force, the resistance received is less than that of the stop flange 52 restricts the resistance of the seal 6 to retract to the avoidance channel 51 and cooperate with the limit portion 62 to ensure that the seal 6 is always in the initial state before the connection head 61 of the seal 6 is connected with the liquid-through core 3 of the needle structure 1. state, and the limiting portion 62 can press the elastic member 8 to provide the elastic member 8 with a resilience.
  • the needle tube structure 10 further includes: a positioning seat 9 , the positioning seat 9 is arranged on the push rod 5 , and a first A snap portion 91, the seal 6 is provided with a second snap portion 63; after the seal 6 and the needle structure 1 are retracted into the escape channel 51, the first snap portion 91 and the second snap portion 63 snap together , to position the seal 6.
  • a positioning seat 9 is provided.
  • One end of the locating seat 9 is provided with a first clamping portion 91, and the sealing member 6 is provided with a second clamping portion 63.
  • the first clamping portion 91 is engaged with the second engaging portion 63 .
  • the sealing member 6 can be positioned by cooperating with the positioning seat 9 , thereby positioning the needle installed in the liquid-passing core 3 and making it in a safe position.
  • one of the first clamping portion 91 and the second clamping portion 63 is a clamping groove
  • the other one of the first clamping portion 91 and the second clamping portion 63 is a clamping groove. Snaps that match the slots.
  • One of the first snap portion 91 and the second snap portion 63 is a snap slot, and the other of the first snap portion 91 and the second snap portion 63 is a snap fit with the snap slot,
  • Such a structure is simple and easy to implement, and can ensure the fixation of the sealing member 6 in the avoidance channel 51 .
  • the sealing member 6 is provided with a positioning hole 64
  • the positioning seat 9 is provided with a positioning plug 92 ; After the 6 and the liquid-passing core 3 are retracted into the avoidance channel 51 , the positioning plug 92 is inserted into the positioning hole 64 .
  • the sealing member 6 is provided with a positioning hole 64 , and the positioning seat 9 is provided with a positioning plug 92 ; This arrangement enables the sealing member 6 to cooperate with the positioning seat 9 more smoothly under the action of thrust.
  • the first clamping portion 91 is a clamping groove, and the clamping groove is provided on one side of the positioning plug 92 .
  • the second snap portion 63 is a snap fit with the snap slot. At least part of the snap is located in the positioning hole 64 , so that when the positioning plug 92 is inserted into the positioning hole 64 , the snap is locked in the snap slot.
  • the first clamping portion 91 is a clamping groove, and the clamping groove is provided on one side of the positioning plug 92, and the second clamping portion 91 is a clamping groove.
  • the clip portion 63 is a clip matched with the clip slot. At least part of the clip is located in the positioning hole 64 , so that when the positioning plug 92 is inserted into the positioning hole 64 , the clip is locked in the clip slot. Referring to FIGS.
  • the buckle can be configured as a structure with a narrow top and a wide bottom, so that the positioning plug 92 can be smoothly inserted into the positioning hole 64 , and at the same time after the positioning plug 92 is inserted into the positioning hole 64 , the buckle can fix the positioning plug 92 therein through the card slot.
  • the buckle is an elastic sheet structure, one end of the elastic sheet structure is connected to the main body of the sealing member 6, and the other end of the elastic sheet structure is used to be clamped into the clamping groove; and/or
  • the clamping groove is an annular groove, there are a plurality of clamping buckles, and the plurality of clamping buckles are arranged around the clamping groove to be respectively clamped into the clamping groove.
  • the buckle is set as an elastic sheet structure, one end (fixed end) of the elastic sheet structure is connected to the main body of the seal 6, and the other end (free end) of the elastic sheet structure is used to be clamped into the clamping groove, using The resilient force of the shrapnel structure fastens the positioning plug 92 .
  • the clamping groove is an annular groove, there are a plurality of clamping buckles, and the plurality of clamping buckles are arranged around the clamping groove to be respectively clamped into the clamping groove.
  • the clamping grooves are annular grooves, and a plurality of buckles are arranged around the clamping grooves to be respectively inserted into the clamping grooves, which makes the fixing more reliable. .
  • the outer surface of the connecting head 61 is at least part of a spherical surface; and/or the connecting portion 21 is a threaded hole or an external thread, so that the housing 2 and the needle structure 1 are threadedly connected; and/or a push rod 5 has a push portion 54, and the push portion 54 is arranged at one end of the push rod 5 close to the needle structure 1, so as to push the liquid-proof member 4 of the needle structure 1 on the outside of the liquid-through core 3 to move through the push portion 54, so that the liquid-through core is moved. 3. Disengage the mounting seat 11 of the needle structure 1.
  • connection head 61 Setting the outer surface of the connecting head 61 to be at least part of the spherical surface can make the connecting head 61 enter the liquid-passing core 3 more smoothly so as to be connected with the liquid-passing core 3 .
  • the connecting part 21 is a threaded hole or an external thread, so that the housing 2 and the needle structure 1 are threadedly connected, so that the needle structure 1 and the housing 2 can be screwed together.
  • This structure is simple and detachable, and the housing 2 and the needle The sealed connection of the structure to meet its injection function.
  • a push portion 54 is provided on the push rod 5, and the push portion 54 is arranged at the end of the push rod 5 close to the needle structure 1.
  • the connector 61 When moving toward the needle structure 1, the connector 61 is connected with the liquid-passing core 3, and at the same time, the pusher 54 pushes the liquid-proof member 4 located outside the liquid-passing core 3 to move, so as to disengage the liquid-proof member 4.
  • the liquid-passing core 3 The outer side of the liquid-proof member 4 loses the limiting function of the liquid-proof member 4 , and the sealing member 6 can more easily drive the liquid-through core 3 to bounce back into the avoidance channel 51 .
  • the present application also provides a syringe, comprising a needle structure 1 and a needle tube structure 10 , the needle tube structure 10 is detachably connected to the needle head structure 1 , and the needle tube structure 10 is the above-mentioned needle tube structure 10 .
  • the syringe of this embodiment includes: a mounting seat 11 , a mounting cavity 111 is provided on the mounting seat 11 , and the mounting seat 11 is detachably connected to the casing 2 of the syringe;
  • the liquid-passing core 3 is used to install the needle, and the liquid-passing core 3 is penetrated in the installation cavity 111;
  • the liquid-proof member 4, the liquid-proof member 4 is arranged between the inner wall of the installation cavity 111 and the outer wall of the liquid-passing core 3, so as to prevent The liquid part 4 seals between the mounting seat 11 and the liquid-passing core 3; wherein, the liquid-proof part 4 cooperates with the liquid-passing core 3 in a limited position, so that the liquid-passing core 3 is positioned on the mounting seat 11 by the liquid-proof part 4,
  • the liquid-passing core 3 is separated from the liquid-proof member 4 and the mounting seat 11 under the action of external force, so that the needle is retracted into the escape channel 51 of the push
  • the mounting seat 11 is connected to the housing 2 , and the mounting seat 11 is configured as a structure with a cavity inside to form the mounting seat 11 ;
  • a liquid-proof member 4 is arranged between the inner wall of the mounting cavity 111 of the seat 11 and the outer wall of the liquid-passing core 3 . The function of the liquid-proof member 4 is to fix the liquid-passing core 3 on the mounting seat 11 and prevent the liquid in the needle tube from penetrating into the mounting seat 11 .
  • the liquid-passing core 3 when the liquid-passing core 3 is acted by an external force and moves to the outside of the mounting seat 11 along the axial direction of the housing, the liquid-passing core 3 can be separated from the liquid-proof member 4, so that the needle can be retracted into the push rod 5 of the needle tube structure 10. Avoid the inside of the channel 51 .
  • the mounting seat 11 is connected with the shell 2 by threads, the liquid-passing core 3 is inserted into the mounting seat 11, and the liquid-proof member 4 is fixed on the inner wall of the mounting seat 11, and the liquid-proof member 4 is annular.
  • the parts 4 are limited and matched to position the liquid-passing core 3 in the mounting seat 11; when the liquid-passing core 3 is driven by the connecting head 61 to be separated from the liquid-proof member 4, the pushing part 54 pushes the liquid-proof member 4 to disengage the liquid-proof member 4.
  • the core 3 is inserted so that the liquid core 3 is retracted toward the interior of the housing 2, and a needle is installed in the liquid core 3 for outputting the liquid in the needle tube into the human body.
  • a ball-shaped first locking portion 31 is arranged on the liquid-passing core 3, and a connector 61 is arranged on the sealing member 6 to be locked and fitted with the ball-shaped first locking portion 31; in the initial state, the first locking portion 31 and the connecting head 61 are in a separated state.
  • the connecting head 61 on the sealing member 6 moves toward the needle structure 1 through the action of external force and contacts the liquid-passing core 3, and is connected with the first locking part in the liquid-passing core 3.
  • the liquid core 3 drives the needle to retract into the housing 2 .
  • the liquid-passing core 3 includes a first core segment 35 , a second core segment 36 , a third core segment 37 , and a third core segment 37 connected in sequence.
  • the body segment 37 is provided with an elastic groove 371 , and the elastic groove 371 extends from the free end of the third core segment 37 toward the second core segment 36 .
  • the spherical connector 61 is pressed into the locking groove 321 provided in the liquid wick 3 .
  • the pushing portion 54 on the push rod 5 pushes the liquid-proof member 4 on the outside of the liquid-passing core 3 to separate from the liquid-passing core 3, and the stop flange 52 pushes the limiting portion 62 to squeeze the elastic member 8 (here the elastic member is selected as a spring) between the limiting portion 62 and the stop step 53 .
  • the push rod 5 cannot continue to move in the injection cavity 22 due to the limiting effect of the housing 2, and the pushing force of the push rod 5 is further increased, so that the limiting portion 62 overcomes the contact with the stop flange 52.
  • the limit fit enters the narrow section of the avoidance channel 51 in the stop flange 52.
  • the squeezed elastic member 8 releases the rebound force and pushes the seal 6 through the stop flange 52 to continue to retract and set in the push.
  • the positioning seat 9 in the rod 5 is in contact, and the positioning plug 92 provided on the positioning seat 9 is inserted into the sealing member 6 from the positioning hole 64 provided on the sealing member 6.
  • the bottom of the positioning plug 92 is provided with a slot that matches the buckle. After the positioning plug 92 passes through the buckle, the slot at the lower end of the positioning plug 92 is locked with the buckle, so that the seal 6 and the positioning seat 9 form an interference fit. Position the seal 6 on the positioning seat 9 .
  • the locking groove 321 of the liquid-passing core 3 is locked and matched with the connecting head 61 on the sealing member 6 .
  • the sealing member 6 retracts into the escape channel 51 along with the push rod 5 , and the first locking portion 31 is locked and matched with the connecting head 61 .
  • the liquid-passing core 3 is driven away from the liquid-proof member 4 and retracted into the avoidance channel 51 together.
  • the needle is fixed on the liquid-passing core 3 and retracted to the positioning seat 9 along with the liquid-passing core 3 for positioning.
  • the sealing member 6 is installed on the end of the push rod 5 close to the needle structure 1, and is provided with a number of limiting protrusions 65 and steps 66, so that the liquid will not be separated when the high pressure is generated.
  • the positioning hole 64 at the rear end of the sealing member 6 is set in a hemispherical structure to prevent the syringe from being damaged due to collision due to excessive resilience of the sealing member 6 .
  • the present application provides a needle tube structure and a syringe having the same.
  • the needle tube structure includes: a housing 2, the housing 2 has an injection cavity 22; Inside the cavity 22; the sealing member 6, the sealing member 6 is detachably installed in the avoidance channel 51; wherein, the housing 2 is provided with a connecting portion 21 for detachably connecting with the needle structure 1 of the syringe, and the sealing member 6 has a
  • the connecting head 61 on the outside of the avoidance channel 51 is used to connect with the liquid-through core 3 of the needle structure 1 to drive the liquid-through core 3 to retract into the avoidance channel 51, which solves the problem that the needle of the syringe is easy to collect and process. Stabbing medical staff, which in turn leads to the spread of hepatitis B, hepatitis C, AIDS and other diseases, which leads to the problem of medical staff infection.

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  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
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  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种针管结构(10)及具有其的注射器，针管结构(10)包括：外壳(2)，外壳(2)具有注射腔体(22)；推杆(5)，推杆(5)具有避让通道(51)，推杆(5)可移动地设置在注射腔体(22)内；密封件(6)，密封件(6)安装在避让通道(51)内；其中，外壳(2)上设置有用于与注射器的针头结构(1)可拆卸地连接的连接部(21)，密封件(6)具有位于避让通道(51)外侧的连接头(61)，连接头(61)用于与针头结构(1)的通液芯(3)连接，以带动通液芯(3)缩入至避让通道(51)内。该针管结构(10)解决了注射器的针头在收集处理过程中容易刺伤医护人员，进而导致乙肝、丙肝、艾滋病等疾病的传播而引发医护人员感染的问题。

Description

针管结构及具有其的注射器
本申请要求于2020年08月27日提交至中国国家知识产权局、申请号为202010880024.6、发明名称为“针管结构及具有其的注射器”的专利申请的优先权。
技术领域
本申请涉及医疗器械领域，具体而言，涉及一种针管结构及具有其的注射器。
背景技术
注射器是一种最基本的医疗器械，为了减少血源性疾病在病人中的传播，世界各国纷纷立法强制推广使用一次性安全注射器。
现阶段，常见的一次性注射器普遍存在可以重复使用及没有安全装置，注射后针管外露等缺陷，一方面易被不法分子或毒瘾君子所利用，另一方面将原本只可一次性使用的注射器重复使用，极易造成病毒传播和交叉感染。
在一次性注射器的使用后，注射器的针头在收集处理过程中容易刺伤医护人员，进而导致乙肝、丙肝、艾滋病等疾病的传播而引发医护人员感染，各国护士及收废人员都存在被注射器针头外露而被刺伤的情况。
发明内容
本申请的主要目的在于提供一种针管结构及具有其的注射器，以解决现有技术中的注射器的针头外露容易刺伤工作人员的问题。
为了实现上述目的，根据本申请的一个方面，提供了一种针管结构，包括：外壳，外壳具有注射腔体；推杆，推杆具有避让通道，推杆可移动地设置在注射腔体内；密封件，密封件的至少部分安装在避让通道内；其中，外壳上设置有用于与注射器的针头结构可拆卸地连接的连接部，密封件具有位于避让通道外侧的连接头，连接头用于与针头结构的通液芯连接，以带动通液芯缩入至避让通道内。
进一步地，密封件具有初始状态和缩入状态，当密封件位于初始状态时，密封件定位在推杆上，连接头位于避让通道的外侧；当密封件位于缩入状态时，密封件和通液芯位于避让通道内；避让通道的内壁上设置有止挡凸缘，密封件上设置有与止挡凸缘相配合的限位部，以通过止挡凸缘与限位部之间的限位配合将密封件定位在初始状态，并在限位部在外力的作用下克服止挡凸缘的止挡作用后，使密封件运动至缩入状态。
进一步地，止挡凸缘凸出于避让通道的主通道的内壁面，止挡凸缘沿避让通道的延伸方向延伸。
进一步地，针管结构还包括：弹性件，避让通道内设置有止挡台阶，当密封件位于初始状态时，弹性件的一端与止挡台阶抵接，弹性件的另一端与限位部靠近针头结构的一侧抵接；和/或密封圈，密封圈套设在推杆上并位于推杆与外壳之间，以对推杆与外壳之间的间隙进行密封。
进一步地，止挡凸缘具有止挡面，限位部具有限位面，当密封件处于初始状态时，止挡面与限位面接触；其中，限位面为球体结构的部分表面，止挡面与限位面相配合。
进一步地，针管结构还包括：定位座，定位座设置在推杆上，定位座上设置有第一卡接部，密封件上设置有第二卡接部；在密封件和针头结构缩入避让通道内后，第一卡接部和第二卡接部卡接，以对密封件进行定位。
进一步地，第一卡接部和第二卡接部中的一个为卡接槽，第一卡接部和第二卡接部中的另一个为与卡接槽相配合的卡扣。
进一步地，密封件上设置有定位孔，定位座上设置有定位插头；在密封件和通液芯缩入避让通道内后，定位插头插设在定位孔内。
进一步地，第一卡接部为卡接槽，卡接槽设置在定位插头的一侧，第二卡接部为与卡接槽相配合的卡扣，卡扣的至少部分位于定位孔内，以在定位插头插设在定位孔内时，卡扣卡设在卡接槽内。
进一步地，卡扣为弹片结构，弹片结构的一端与密封件的主体部连接，弹片结构的另一端用于卡入卡接槽内；和/或卡接槽为环形槽，卡扣为多个，多个卡扣环绕卡接槽设置以分别卡入卡接槽内。
进一步地，连接头的外表面为球形面的至少部分；和/或连接部为螺纹孔或外螺纹，以使外壳与针头结构螺纹连接；和/或推杆具有推动部，推动部设置在推杆的靠近针头结构的一端，以通过推动部推动针头结构的位于通液芯外侧的防液件运动，以使通液芯脱离针头结构的安装座。
根据本申请的另一方面，提供了一种注射器，包括针头结构和针管结构，针管结构与针头结构可拆卸地连接，针管结构为上述的针管结构。
进一步地，针头结构包括：安装座，安装座上设置有安装座，安装座与注射器的外壳可拆卸地连接；通液芯，通液芯用于安装针头，通液芯穿设在安装座内；防液件，防液件设置在安装座的内壁和通液芯的外壁之间，以通过防液件对安装座和通液芯之间进行密封；其中，防液件与通液芯限位配合，以通过防液件将通液芯定位在安装座上，并使通液芯在外力的作用下与防液件和安装座脱离以使针头缩入针管结构的推杆的避让通道内。
应用本申请的技术方案，包括：外壳，外壳具有注射腔体；推杆，推杆具有避让通道，推杆可移动地设置在注射腔体内；密封件，密封件安装在避让通道内；其中，外壳上设置有用于与注射器的针头结构可拆卸地连接的连接部，密封件具有位于避让通道外侧的连接头， 连接头用于与针头结构的通液芯连接，以带动通液芯缩入至避让通道内，解决了注射器的针头在收集处理过程中容易刺伤医护人员，进而导致乙肝、丙肝、艾滋病等疾病的传播而引发医护人员感染的问题。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了本申请的注射器的实施例的结构示意图；
图2示出了本申请的注射器的针管结构的密封件处于缩入状态的结构示意图；
图3示出了本申请的注射器的针管结构的密封件处于初始状态的结构示意图；
图4示出了本申请的针管结构的密封件的实施例的结构示意图；
图5示出了本申请的针管结构的外壳的实施例的结构示意图；
图6示出了图5中的针管结构的外壳的仰视图；
图7示出了本申请的针管结构的推杆的实施例的结构示意图；
图8示出了图7中的针管结构的推杆的俯视图；
图9示出了本申请的针管结构的定位座的实施例的结构示意图；
图10示出了本申请的注射器的针头结构的实施例的结构示意图；
图11示出了本申请的注射器的针头结构的安装座的实施例的结构示意图；
图12示出了图11中的针头结构的安装座的内部结构图；
图13示出了本申请的注射器的针头结构的通液芯的实施例的结构示意图；以及
图14示出了图13中的针头结构的通液芯的内部结构图。
其中，上述附图包括以下附图标记：
1、针头结构；11、安装座；111、安装腔；2、外壳；21、连接部；22、注射腔体；3、通液芯；31、第一锁紧部；321、锁紧槽；33、流体通道；35、第一芯体段；36、第二芯体段；37、第三芯体段；371、弹性槽；4、防液件；5、推杆；51、避让通道；52、止挡凸缘；521、止挡面；53、止挡台阶；54、推动部；6、密封件；61、连接头；62、限位部；621、限位面；63、第二卡接部；64、定位孔；65、限位凸起；66、台阶；7、密封圈；8、弹性件；9、定位座；91、第一卡接部；92、定位插头；10、针管结构。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
本申请提供了一种针管结构，包括：外壳2，外壳2具有注射腔体22；推杆5，推杆5具有避让通道51，推杆5可移动地设置在注射腔体22内；密封件6，密封件6的至少部分安装在避让通道51内；其中，外壳2上设置有用于与注射器的针头结构1可拆卸地连接的连接部21，密封件6具有位于避让通道51外侧的连接头61，连接头61用于与针头结构1的通液芯3连接，以带动通液芯3缩入至避让通道51内，解决了注射器的针头在收集处理过程中容易刺伤医护人员，进而导致乙肝、丙肝、艾滋病等疾病的传播而引发医护人员感染的问题。
具体的，如图1至图10所示，本申请的针管结构10的外壳2内安装有推杆5，外壳2内部设有注射腔体22，注射腔体22用于容纳所需注射的注射液，推杆5的作用是将注射腔体22中的注射液推出注射腔体22以完成注射。推杆5为壳体结构，如图7所示，推杆5的内部形成有避让通道51，避让通道51内安装有密封件6，密封件6的至少部分安装在避让通道51内，并且密封件6可以在避让通道51内滑动。
外壳2的出口位置处设置有连接部21，用于与针头结构1连接。可选地，连接部为开设在外壳2内壁中的内螺纹，相应地，针头结构1上设有与外壳2内壁上的内螺纹相配合的外螺纹。
如图3、图4所示，密封件6上设置有连接头61，密封件6安装在避让通道51中，连接头61朝向避让通道51的外侧(即朝向针头结构1的一侧)，连接头61的作用是与针头结构1中的通液芯3连接。当密封件6受外力作用在避让通道51中滑动并远离针头结构1时，密封件6上的连接头61将连接于其上的通液芯3带离针头结构1缩入至避让通道51内，此时安装于通液芯中的针头也跟随通液芯3一起回缩至避让通道51内，缩入至避让通道51内的针头不再外露于注射器外，在针头的收集处理过程中便不会刺伤医护人员，解决了注射器的针头在收集处理过程中容易刺伤医护人员，进而导致乙肝、丙肝、艾滋病等疾病的传播而引发医护人员感染的问题。
如图1至图3所示，本实施例的针管结构10中密封件6具有初始状态和缩入状态，当密封件6位于初始状态时，密封件6定位在推杆5上，连接头61位于避让通道51的外侧；当密封件6位于缩入状态时，密封件6和通液芯3位于避让通道51内；避让通道51的内壁上设置有止挡凸缘52，密封件6上设置有与止挡凸缘52相配合的限位部62，以通过止挡凸缘52与限位部62之间的限位配合将密封件6定位在初始状态，并在限位部62在外力的作用下克服止挡凸缘52的止挡作用后，使密封件6运动至缩入状态。
本实施例的针管结构10的密封件6具有初始状态和缩入状态，在初始状态时，如图1和图3所示，密封件6定位在推杆5上，连接头61位于避让通道51的外侧，此种结构，可以让连接头61充分凸出于推杆5，以便与针头结构1中的通液芯3结合，不会因为推杆5自身的结构对连接头61与通液芯3的连接造成干涉。
在缩入状态时，如图2所示，密封件6和通液芯3位于避让通道51内，将密封件6和通液芯3缩回避让通道51内，目的是将安装于通液芯3中的针头缩回注射器中并且不会外露于注射器外，因为针头的长度是根据不同的注射需求所设置的。当针头很长时，为了保证连接头61将通液芯3中的针头完全缩入避让通道51并不外漏于针头结构1，密封件6和通液芯3需位于避让通道51内，以保证针头的回缩行程。
为了确保密封件6的初始状态，使密封件6在不受外力作用时不会在避让通道51内自由滑动，避让通道51的内壁上设置有止挡凸缘52，密封件6上设置有与止挡凸缘52相配合的限位部62，止挡凸缘52与限位部62之间的限位配合。当密封件6不受外力作用时，止挡凸缘52通过与限位部62的限位配合，从而限制了密封件6向避让通道51内运动的趋势，从而被定位在初始状态。
需要说明的是，当密封件6上的连接头61与针头结构1的通液芯3通过推力连接时，所受的阻力要小于止挡凸缘52限制密封件6向避让通道51缩入而与限位部62配合产生的阻力，以确保密封件6的连接头61在与针头结构1的通液芯3完成连接之前密封件6一直处于初始状态。
如图1、图2、图3所示，本实施例的针管结构中，止挡凸缘52凸出于避让通道51的主通道的内壁面，止挡凸缘52沿避让通道51的延伸方向延伸。
将止挡凸缘52设置为凸出于避让通道51的主通道的内壁面，沿避让通道51的延伸方向延伸的结构，可以通过与限位部62的限位配合将密封件6定位在初始状态，止挡凸缘52处形成了一段避让通道51较狭窄通道段。当密封件6向避让通道51内缩入并穿过止挡凸缘52时，止挡凸缘52可以进一步地将密封件6的位置限制在止挡凸缘52的另一端，从而将密封件6限位与避让通道51中。
本实施例的针头结构中，如图1至图3所示，针管结构10还包括：弹性件8，避让通道51内设置有止挡台阶53，当密封件6位于初始状态时，弹性件8的一端与止挡台阶53抵接，弹性件8的另一端与限位部62靠近针头结构1的一侧抵接；和/或密封圈7，密封圈7套设在推杆5上并位于推杆5与外壳2之间，以对推杆5与外壳2之间的间隙进行密封。
为了推动密封件6穿过止挡凸缘52以使密封件6从初始状态达到缩入状态，设置弹性件8，当密封件6位于初始状态时，弹性件8的一端与止挡台阶53抵接，弹性件8的另一端与限位部62靠近针头结构1的一侧抵接。当推杆5受力推动密封件6上的连接头61与针头结构1中的通液芯连接后，止挡凸缘52推动密封件6将弹性件8挤压在止挡台阶53和限位部62之中，弹性件8受到压缩产生回弹力。当弹性件8产生的回弹力大于止挡凸缘52与限位部62限位配合的阻力时，弹性件8释放回弹力将密封件6反推缩回避让通道51中，以使密封件6达到缩回状态。
为了以对推杆5与外壳2之间的间隙进行密封，本实施例的针管结构10中设置密封圈7，密封圈7套设在推杆5上并位于推杆5与外壳2之间。
如图1、图2、图3、图4、图7所示，本实施例的针管结构10中，止挡凸缘52具有止挡面521，限位部62具有限位面621，当密封件6处于初始状态时，止挡面521与限位面621接触；其中，限位面621为球体结构的部分表面，止挡面521与限位面621相配合。
本实施例中，止挡凸缘52具有止挡面521，限位部62具有限位面621，当密封件6处于初始状态时，止挡面521与限位面621接触，以对密封件6进行定位。限位面621为球体结构的部分表面，止挡面521与限位面621相配合，如此设置，可以通过调整限位面621的球体的部分表面与止挡面521接触面积和接触角度，以调整限位部62与止挡凸缘52之间的阻力，以保证当密封件6上的连接头61与针头结构1的通液芯3通过推力连接时所受的阻力要小于止挡凸缘52限制密封件6向避让通道51缩回而与限位部62配合产生的阻力，以确保密封件6的连接头61在与针头结构1的通液芯3完成连接之前密封件6一直处于初始状态，并且能够使限位部62挤压弹性件8以为弹性件8提供回弹力。
本实施例中，如图1、图2、图3、图4、图9所示，针管结构10还包括：定位座9，定位座9设置在推杆5上，定位座9上设置有第一卡接部91，密封件6上设置有第二卡接部63；在密封件6和针头结构1缩入避让通道51内后，第一卡接部91和第二卡接部63卡接，以对密封件6进行定位。
当密封件6处于缩回状态后，为了对密封件6进行定位，如图1至图3、图4和图9所示，设置定位座9，定位座9设置在推杆5远离针头结构1的一端，定位座9上设置有第一卡接部91，密封件6上设置有第二卡接部63，在密封件6和针头结构1缩入避让通道51内后，第一卡接部91和第二卡接部63卡接。如此，当密封件6缩入避让通道51后，通过与定位座9配合，可以将密封件6进行定位，从而定位安装在通液芯3中的针头，使其处于安全位置。
本实施例的针管结构10中，第一卡接部91和第二卡接部63中的一个为卡接槽，第一卡接部91和第二卡接部63中的另一个为与卡接槽相配合的卡扣。
将第一卡接部91和第二卡接部63中的一个为卡接槽，第一卡接部91和第二卡接部63中的另一个为与卡接槽相配合的卡扣，此种结构简单易实现，可以保证密封件6在避让通道51中的固定。
如图1、图2、图3、图4、图9所示，本实施例的针管结构10中，密封件6上设置有定位孔64，定位座9上设置有定位插头92；在密封件6和通液芯3缩入避让通道51内后，定位插头92插设在定位孔64内。
将密封件6上设置有定位孔64，定位座9上设置有定位插头92；在密封件6和通液芯3缩入避让通道51内后，定位插头92插设在定位孔64内。如此设置，使密封件6在推力的作用下，更顺利地与定位座9配合。
如图1、图2、图3、图4、图9所示，本实施例的针管结构10中，第一卡接部91为卡接槽，卡接槽设置在定位插头92的一侧，第二卡接部63为与卡接槽相配合的卡扣，卡扣的至少部分位于定位孔64内，以在定位插头92插设在定位孔64内时，卡扣卡设在卡接槽内。
在密封件6与定位座9连接后，为了达到将密封件6固定于定位座9的目的，第一卡接部91为卡接槽，卡接槽设置在定位插头92的一侧，第二卡接部63为与卡接槽相配合的卡扣，卡扣的至少部分位于定位孔64内，以在定位插头92插设在定位孔64内时，卡扣卡设在卡接槽内。参照图1、图2、图3、图4以及图9，卡扣可以设置为上窄下宽的结构，以使定位插头92顺利地插入定位孔64，同时在定位插头92插入定位孔64后，卡扣可以通过卡槽将定位插头92固定其中。
本实施例的针管结构中，如图4所示，卡扣为弹片结构，弹片结构的一端与密封件6的主体部连接，弹片结构的另一端用于卡入卡接槽内；和/或卡接槽为环形槽，卡扣为多个，多个卡扣环绕卡接槽设置以分别卡入卡接槽内。
如图4所示，将卡扣设为弹片结构，弹片结构的一端(固定端)与密封件6的主体部连接，弹片结构的另一端(自由端)用于卡入卡接槽内，利用弹片结构的回弹力，将定位插头92紧固。更优地，卡接槽为环形槽，卡扣为多个，多个卡扣环绕卡接槽设置以分别卡入卡接槽内。将卡扣设为多个，增加了卡扣对卡槽的夹紧力，卡接槽为环形槽，多个卡扣环绕卡接槽设置以分别卡入卡接槽内，使固定更为可靠。
本实施例的针管结构中，连接头61的外表面为球形面的至少部分；和/或连接部21为螺纹孔或外螺纹，以使外壳2与针头结构1螺纹连接；和/或推杆5具有推动部54，推动部54设置在推杆5的靠近针头结构1的一端，以通过推动部54推动针头结构1的位于通液芯3外侧的防液件4运动，以使通液芯3脱离针头结构1的安装座11。
将连接头61的外表面设置为球型面的至少部分，可以使连接头61更为顺利的进入通液芯3中以使其与通液芯3连接。
将连接部21为螺纹孔或外螺纹，以使外壳2与针头结构1螺纹连接，这样针头结构1和外壳2便可螺接在一起，此种结构简单、可拆卸，并且使外壳2与针头结构的密封连接，以满足其注射功能。
为了使通液芯3脱离针头结构1的安装座11，在推杆5上设置推动部54，推动部54设置在推杆5的靠近针头结构1的一端，当推杆5与其中的密封件6朝向针头结构1运动时，连接头61与通液芯3连接，同时推动部54推动位于通液芯3外侧的防液件4运动，以使防液件4脱离，此时通液芯3的外侧失去了防液件4的限位作用，密封件6可以更加容易地带动通液芯3回弹入避让通道51。
本申请还提供了一种注射器，包括针头结构1和针管结构10，针管结构10与针头结构1可拆卸地连接，针管结构10为上述的针管结构10。
本实施例的注射器中，如图1至图14所示，包括：安装座11，安装座11上设置有安装腔111，安装座11与注射器的外壳2可拆卸地连接；通液芯3，通液芯3用于安装针头，通液芯3穿设在安装腔111内；防液件4，防液件4设置在安装腔111的内壁和通液芯3的外壁之间，以通过防液件4对安装座11和通液芯3之间进行密封；其中，防液件4与通液芯3限位 配合，以通过防液件4将通液芯3定位在安装座11上，并使通液芯3在外力的作用下与防液件4和安装座11脱离，以使针头缩入针管结构10的推杆5的避让通道51内。
如图1、图2、图3、图10所示，安装座11连接于外壳2上，安装座11设置为内部带空腔的结构以构成安装座11；安装座的安装腔111中穿设有通液芯3，通液芯3用于安装针头，通液芯3中设有流体通道33，针管中的液体可以通过通液芯3的流体通道33输入到针头中，以完成注射；安装座11的安装腔111内壁与通液芯3的外壁之间设置有防液件4，防液件4固定安装于安装座11内壁，并与通液芯3限位配合。防液件4的作用是可以将通液芯3固定在安装座11上，并且防止针管内的液体渗入安装座11中。
另外，当通液芯3受到外力的作用，向安装座11外侧沿着外壳的轴向移动时，通液芯3可以脱离防液件4，以使针头缩入针管结构10的推杆5的避让通道51内。
下面，就本申请的一种优选实施例进行说明：
安装座11与外壳2通过螺纹连接，通液芯3穿设于安装座11中，安装座11的内壁上固定有防液件4，防液件4为环状，通液芯3与防液件4限位配合，以将通液芯3定位在安装座11中；在通液芯3收到连接头61的带动与防液件4脱离时，推动部54推动防液件4脱离通液芯3，以使所通液芯3朝向外壳2的内部缩入，通液芯3中安装有针头，用于将针管内的液体输出到人体中。
通液芯3上设置球头状的第一锁紧部31，密封件6上设置与球头状的第一锁紧部31锁紧配合的连接头61；初始状态时，第一锁紧部31和连接头61处于分离状态，当进行注射时，密封件6上的连接头61通过外力的作用向着针头结构1运动并接触通液芯3，与通液芯3中的第一锁紧部31锁紧配合，锁紧配合后的通液芯3可随着连接头61在外力的作用下向着避让通道51移动，使通液芯3可以挣脱防液件4的限位作用，从而完成通液芯3带动针头缩回外壳2内。
如图13、图14所示，沿通液芯3的缩回方向，通液芯3包括依次连接的第一芯体段35第二芯体段36和第三芯体段37，第三芯体段37上设置有弹性槽371，弹性槽371由第三芯体段37的自由端朝向第二芯体段36延伸。当医护人员进行注射时，推杆5挤压注射腔体22中的注射液，使注射液通过通液芯3进入针头以完成注射，在注射的过程中，连接头61在外力的作用下压向通液芯3的流体通道33中，球头状的连接头61被压入设置在通液芯3中的锁紧槽321。推杆5上的推动部54推动通液芯3外侧的防液件4脱离通液芯3，止挡凸缘52推动限位部62将弹性件8(此处弹性件选为弹簧)挤压在限位部62与止挡台阶53之间。
当医护人员完成输液后，推杆5受到外壳2的限位作用无法在注射腔体22中继续移动，推杆5的推动力进一步增大，使限位部62克服了与止挡凸缘52的限位配合进入了止挡凸缘52中的避让通道51的狭窄段，此时被挤压的弹性件8释放回弹力推动密封件6穿过止挡凸缘52继续回缩与设置在推杆5中的定位座9接触，定位座9上设置的定位插头92从设置于密封件6上的定位孔64插入密封件6，密封件6中设置有弹片结构的卡扣，定位座9的定位插头 92的下方设置有与卡扣相配合的卡槽，定位插头92穿过卡扣后定位插头92下端的卡槽与卡扣卡紧，使密封件6与定位座9形成过盈配合，将密封件6定位在定位座9上。
通液芯3的锁紧槽321与密封件6上的连接头61锁紧配合，密封件6随着推杆5缩入避让通道51，与连接头61锁紧配合的第一锁紧部31带动通液芯3脱离防液件4一起向避让通道51内缩回，针头固定在通液芯3上并随着通液芯3一同缩入至定位座9处定位。
另外，在本申请的注射器的另一个实施例中，如图1至图4所示：
密封件6安装于推杆5靠近针头结构1的一端，设置若干限位凸起65及台阶66，提供液体产生高压时不会脱离。密封件6后端的定位孔64设置为半球型结构，以防密封件6的回弹力过大发生碰撞从而损坏注射器。
从以上的描述中，可以看出，本申请上述的实施例实现了如下技术效果：
本申请提供了一种针管结构与具有其的注射器，针管结构包括：外壳2，外壳2具有注射腔体22；推杆5，推杆5具有避让通道51，推杆5可移动地设置在注射腔体22内；密封件6，密封件6可拆卸地安装在避让通道51内；其中，外壳2上设置有用于与注射器的针头结构1可拆卸地连接的连接部21，密封件6具有位于避让通道51外侧的连接头61，连接头61用于与针头结构1的通液芯3连接，以带动通液芯3缩入至避让通道51内，解决了注射器的针头在收集处理过程中容易刺伤医护人员，进而导致乙肝、丙肝、艾滋病等疾病的传播而引发医护人员感染的问题。
以上仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内

Claims (13)

  1. 一种针管结构，其特征在于，包括：
    外壳(2)，所述外壳(2)具有注射腔体(22)；
    推杆(5)，所述推杆(5)具有避让通道(51)，所述推杆(5)可移动地设置在所述注射腔体(22)内；
    密封件(6)，所述密封件(6)的至少部分安装在所述避让通道(51)内；
    其中，所述外壳(2)上设置有用于与注射器的针头结构(1)可拆卸地连接的连接部(21)，所述密封件(6)具有位于所述避让通道(51)外侧的连接头(61)，所述连接头(61)用于与所述针头结构(1)的通液芯(3)连接，以带动所述通液芯(3)缩入至所述避让通道(51)内。
  2. 根据权利要求1所述的针管结构，其特征在于，
    所述密封件(6)具有初始状态和缩入状态，当所述密封件(6)位于所述初始状态时，所述密封件(6)定位在所述推杆(5)上，所述连接头(61)位于所述避让通道(51)的外侧；当所述密封件(6)位于缩入状态时，所述密封件(6)和所述通液芯(3)位于所述避让通道(51)内；
    所述避让通道(51)的内壁上设置有止挡凸缘(52)，所述密封件(6)上设置有与所述止挡凸缘(52)相配合的限位部(62)，以通过所述止挡凸缘(52)与所述限位部(62)之间的限位配合将所述密封件(6)定位在所述初始状态，并在所述限位部(62)在外力的作用下克服所述止挡凸缘(52)的止挡作用后，使所述密封件(6)运动至所述缩入状态。
  3. 根据权利要求2所述的针管结构，其特征在于，所述止挡凸缘(52)凸出于所述避让通道(51)的主通道的内壁面，所述止挡凸缘(52)沿所述避让通道(51)的延伸方向延伸。
  4. 根据权利要求2所述的针管结构，其特征在于，所述针管结构还包括：
    弹性件(8)，所述避让通道(51)内设置有止挡台阶(53)，当所述密封件(6)位于所述初始状态时，所述弹性件(8)的一端与所述止挡台阶(53)抵接，所述弹性件(8)的另一端与所述限位部(62)靠近所述针头结构(1)的一侧抵接；和/或
    密封圈(7)，所述密封圈(7)套设在所述推杆(5)上并位于所述推杆(5)与所述外壳(2)之间，以对所述推杆(5)与所述外壳(2)之间的间隙进行密封。
  5. 根据权利要求2所述的针管结构，其特征在于，所述止挡凸缘(52)具有止挡面(521)，所述限位部(62)具有限位面(621)，当所述密封件(6)处于所述初始状态时，所述止挡面(521)与所述限位面(621)接触；其中，所述限位面(621)为球体结构的部分表面，所述止挡面(521)与所述限位面(621)相配合。
  6. 根据权利要求1所述的针管结构，其特征在于，所述针管结构还包括：
    定位座(9)，所述定位座(9)设置在所述推杆(5)上，所述定位座(9)上设置有第一卡接部(91)，所述密封件(6)上设置有第二卡接部(63)；在所述密封件(6)和所述针头结构(1)缩入所述避让通道(51)内后，所述第一卡接部(91)和所述第二卡接部(63)卡接，以对所述密封件(6)进行定位。
  7. 根据权利要求6所述的针管结构，其特征在于，所述第一卡接部(91)和所述第二卡接部(63)中的一个为卡接槽，所述第一卡接部(91)和所述第二卡接部(63)中的另一个为与所述卡接槽相配合的卡扣。
  8. 根据权利要求6所述的针管结构，其特征在于，所述密封件(6)上设置有定位孔(64)，所述定位座(9)上设置有定位插头(92)；在所述密封件(6)和所述通液芯(3)缩入所述避让通道(51)内后，所述定位插头(92)插设在所述定位孔(64)内。
  9. 根据权利要求8所述的针管结构，其特征在于，所述第一卡接部(91)为卡接槽，所述卡接槽设置在所述定位插头(92)的一侧，所述第二卡接部(63)为与所述卡接槽相配合的卡扣，所述卡扣的至少部分位于所述定位孔(64)内，以在所述定位插头(92)插设在所述定位孔(64)内时，所述卡扣卡设在所述卡接槽内。
  10. 根据权利要求7或9所述的针管结构，其特征在于，
    所述卡扣为弹片结构，所述弹片结构的一端与所述密封件(6)的主体部连接，所述弹片结构的另一端用于卡入所述卡接槽内；和/或
    所述卡接槽为环形槽，所述卡扣为多个，多个所述卡扣环绕所述卡接槽设置以分别卡入所述卡接槽内。
  11. 根据权利要求1所述的针管结构，其特征在于，
    所述连接头(61)的外表面为球形面的至少部分；和/或
    所述连接部(21)为螺纹孔或外螺纹，以使所述外壳(2)与所述针头结构(1)螺纹连接；和/或
    所述推杆(5)具有推动部(54)，所述推动部(54)设置在所述推杆(5)的靠近所述针头结构(1)的一端，以通过所述推动部(54)推动所述针头结构(1)的位于所述通液芯(3)外侧的防液件(4)运动，以使所述通液芯(3)脱离所述针头结构(1)的安装座(11)。
  12. 一种注射器，包括针头结构(1)和针管结构(10)，其特征在于，所述针管结构(10)与所述针头结构(1)可拆卸地连接，所述针管结构(10)为权利要求1至11中任一项所述的针管结构(10)。
  13. 根据权利要求12所述的注射器，其特征在于，所述针头结构(1)包括：
    安装座(11)，所述安装座(11)上设置有安装腔(111)，所述安装座(11)与注射器的外壳(2)可拆卸地连接；
    通液芯(3)，所述通液芯(3)用于安装针头，所述通液芯(3)穿设在所述安装腔(111)内；
    防液件(4)，所述防液件(4)设置在所述安装腔(111)的内壁和所述通液芯(3)的外壁之间，以通过所述防液件(4)对所述安装座(11)和所述通液芯(3)之间进行密封；
    其中，所述防液件(4)与所述通液芯(3)限位配合，以通过所述防液件(4)将所述通液芯(3)定位在所述安装座(11)上，并使所述通液芯(3)在外力的作用下与所述防液件(4)和所述安装座(11)脱离，以使所述针头缩入所述针管结构(10)的推杆(5)的避让通道(51)内。
PCT/CN2020/131499 2020-08-27 2020-11-25 针管结构及具有其的注射器 WO2022041524A1 (zh)

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