CN114470410A

CN114470410A - Anti-blocking vein indwelling needle for children

Info

Publication number: CN114470410A
Application number: CN202210094927.0A
Authority: CN
Inventors: 孙勤; 唐炜
Original assignee: Affiliated Hospital of Jiangsu University
Current assignee: Affiliated Hospital of Jiangsu University
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2022-05-13
Anticipated expiration: 2042-01-26
Also published as: CN114470410B

Abstract

The invention discloses an anti-blocking vein children indwelling needle, and relates to the technical field of indwelling needles, in particular to a needle sleeve and a friction plate, wherein a needle head is arranged inside the needle sleeve, a transparent tee joint shell is arranged at the left end of the needle head, a transparent tee joint is fixedly arranged at the local part inside the transparent tee joint shell, a limiting slide way is arranged outside the transparent tee joint, a linking sleeve plate is rotatably arranged outside the limiting slide way, the upper end of the linking sleeve plate is connected with a linking handle, and the friction plate is positioned on the outer surface of the linking handle. This prevent stifled vein children and keep somewhere needle, through the design of the inside built-in screw thread lid of heparin cap, can connect when being connected at heparin cap and malleation, the design of usable heparin cap carries out the screw thread installation from the outside that the malleation connects, and the inside built-in screw thread lid of usable heparin cap carries out screw thread installation once more from the inside that the malleation connects simultaneously, effectively reduces the bacterium and gets into to the inside possibility of malleation joint, and simple structure, and convenient to use person installs fast.

Description

Anti-blocking vein indwelling needle for children

Technical Field

The invention relates to the technical field of indwelling needles, in particular to an anti-blocking vein children indwelling needle.

Background

The use of the indwelling needle can reduce the pain of the sick children caused by repeated venipuncture and the fear of injection, lighten the anxiety of parents, facilitate clinical medication, help the critical patients to take medicine for emergency treatment, lighten the workload of nurses and reduce the pain of the sick children, thereby the intravenous indwelling needle is widely applied clinically.

The existing indwelling needle has the problems that a doctor cannot conveniently store the heparin cap according to the use requirement in the use process, and the linking handle cannot be conveniently rotated at a proper angle according to the puncture use habit.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an anti-blocking vein children indwelling needle, which solves the problems in the background technology.

In order to achieve the purpose, the invention is realized by the following technical scheme: the anti-blocking vein indwelling needle for children comprises a needle sleeve and a friction plate, wherein a needle head is arranged in the needle sleeve, a transparent tee joint shell is arranged at the left end of the needle head, a transparent tee joint is locally and fixedly arranged in the transparent tee joint shell, a limiting slide way is arranged outside the transparent tee joint, a linking sleeve plate is rotatably arranged outside the limiting slide way, a linking sleeve plate is connected to the upper end of the linking sleeve plate, a linking and holding handle is arranged at the upper end of the linking sleeve plate, the friction plate is positioned on the outer surface of the linking and holding handle, an extending sleeve is connected to the left end of the linking and holding handle, a rubber pipe is arranged at one end, close to the needle head, of the lower end of the transparent tee joint, a connecting hose is arranged at the lower end of the rubber pipe, a blood stopping ring is arranged outside the connecting hose, a positive pressure joint is arranged at the end of the connecting hose, a heparin cap is arranged on the external thread of the positive pressure joint, and a linking cap body is arranged at the upper end of the heparin cap, the right-hand member that the malleation connects is provided with the side and puts the extension pipe, and the outside of just side putting the extension pipe is provided with the end cap.

Furthermore, the middle part of the heparin cap is provided with a built-in thread cover, the central axis of the heparin cap coincides with the central axis of the built-in thread cover, and the diameter of the built-in thread cover is smaller than that of the heparin cap.

Further, the inside of linking up the cap body is provided with and is used for carrying out sterile auxiliary assembly to linking up the cap body and heparin cap outside, and auxiliary assembly is including linking up the chamber, built-in block, linking up needle and built-in groove block, the inside that links up the chamber is provided with built-in block, and the inside fixed mounting of built-in block has a linking up needle, the outside one end of keeping away from built-in block of linking up the needle is provided with built-in groove block.

Furthermore, the shape of the built-in groove block is an isosceles trapezoid structure, the interior of the built-in groove block is a hollow structure, and the shape structure of the interior of the built-in groove block is matched with the shape structure of the exterior of the connecting pin.

Furthermore, the linking cavity is annularly distributed about the center of the linking cap body, and the inside of the linking cavity is of a hollow structure.

Further, the inside of hemostasis ring is provided with first limiting plate, the switching cylinder is all installed at the inside upper and lower both ends of hemostasis ring, and the switching cylinder is provided with two.

Furthermore, the auxiliary plate is installed to the one end that switching cylinder was kept away from to the hemostasis ring, the one end that first limiting plate was kept away from to the hemostasis ring is provided with the second limiting plate, and second limiting plate and first limiting plate are located same axis, the inside of second limiting plate is provided with integrative ring.

Further, the inside of auxiliary disc is provided with the hemostasis subassembly that is used for stanching, and the hemostasis subassembly includes built-in cell body, links up cylinder, external groove and rubber pad, the lower extreme of built-in cell body is installed and is linked up the cylinder, and links up the externally mounted of cylinder and have external groove, the both ends of external inslot portion all are connected with the rubber pad.

Furthermore, the interior of the built-in groove body is of a hollow cylindrical structure, the built-in groove body and the connection cylinder body are of an integrated structure, and the shape structure of the outside of the connection cylinder body is matched with the shape structure of the inside of the external groove body.

Furthermore, the upper end and the lower end inside the hemostasis ring are both provided with elastic belts, and the connecting blocks are installed at the left end and the right end outside the elastic belts, and are connected with the hemostasis ring in a clamping mode.

The invention provides an anti-blocking vein indwelling needle for children, which has the following beneficial effects:

children indwelling needle can carry out nimble position adjustment to the turned angle that links up and hold the handle according to doctor's puncture use custom in the use, can make linking up and hold the handle and laminate through rotatory and skin surface after the puncture is ended in being favorable to improving the vein puncture success rate, effectively avoid linking up and hold the handle and be in with skin non-laminating state after the puncture is ended, need hold the syringe needle that the handle is connected through rotating and linking and carry out pivoted problem in the vein, and can stanch the processing fast, can follow the adjustment that carries out fast according to position and length, it is nimble to use, before taking out the use to the heparin cap, can carry out the disinfection processing of disinfecting to the subassembly that is connected with the heparin cap from the outside, reduce the bacterium and get into the inside problem of heparin cap, and the design of heparin cap and malleation joint double thread connection can effectively improve above-mentioned between the two while can also can be inside to reducing outside bacterium entering malleation joint when the sealed degree between the two Can and can accomodate the heparin cap after the indwelling needle puncture is used, need not doctor user's rubber bag and fix.

1. According to the anti-blocking vein indwelling needle for children, a proper rotating space can be provided for the connecting and holding handle through a gap between the transparent tee shell and the transparent tee, the transparent tee can be protected by the design of the transparent tee shell, the connecting and holding handle can rotate by the interaction of the connecting sleeve plate and the limiting slide way, the rotation of the connecting and holding handle is beneficial to performing vein puncture on a child patient according to the using habit of a doctor, the success rate of vein puncture is improved, the connecting and holding handle can be attached to the surface of the skin through rotation after the puncture is finished, and the problem that the connecting and holding handle is not attached to the skin after the puncture is finished and a needle head connected with the connecting and holding handle needs to rotate in a vein through rotation is effectively avoided;

2. according to the anti-blocking vein children indwelling needle, due to the design of the internal thread cover of the heparin cap, when the heparin cap is connected with the positive pressure connector, the thread installation can be carried out from the outside of the positive pressure connector by utilizing the design of the heparin cap, and the thread installation can be carried out again from the inside of the positive pressure connector by utilizing the internal thread cover in the heparin cap, so that the possibility that bacteria enter the inside of the positive pressure connector is effectively reduced, the structure is simple, and the installation is convenient for a user to carry out quickly;

3. the anti-blocking vein indwelling needle for children can apply force to a linking cavity made of PVC material through a fingertip part before a heparin cap is used, so that the linking needle in a built-in block body in the linking cavity applies force to an built-in groove block, the linking cavity can be punctured, medical alcohol placed in the built-in block body in advance overflows due to the rupture of the linking cavity, the outer surface of the heparin cap and the outer surface of a linking cap body can be sterilized and disinfected, the heparin cap and the linking cap body can be taken away for use after sterilization and disinfection are finished, the possibility of entering of bacteria is further reduced, and multiple groups of linking cavities are arranged, so that a user can selectively puncture according to the using times of the indwelling needle;

4. the anti-blocking vein indwelling needle for children can place the connecting hose in the first limiting plate and the second limiting plate in the hemostasis ring, so that when hemostasis treatment is needed, the built-in groove body in the integrated ring can be pressed to enable the built-in groove body to be quickly clamped in the external groove, the connecting hose penetrating into the limiting plate can be positioned by utilizing the design of downward pressing of the built-in groove body, so that internal liquid is not circulated, hemostasis is realized, the structure is simple, a user can quickly operate the anti-blocking vein indwelling needle, the user can draw out a part of the connecting hose from the hemostasis ring according to the requirement of the hemostasis position, and then the operation can be repeated to perform hemostasis treatment, and meanwhile, the whole hemostasis ring can be bent to enable the first limiting plate to be clamped into one side of the second limiting plate, so that dual hemostasis treatment can be realized for the connecting hose, the hemostatic mode is various, so that the hemostatic treatment can be conveniently carried out by a user according to actual needs, the problem of tube blockage can be reduced, and the tube sealing effect can be improved;

5. this prevent stifled vein children and keep somewhere needle, can keep somewhere the needle and use after the user can penetrate the heparin cap to the hemostasis ring in, thereby can utilize the design of hemostasis ring to carry out spacing processing to the heparin cap, it is fixed to avoid the user to use medical sticky tape to paste the heparin cap, reduce the problem that the sticky tape weakens when using for a long time, be convenient for accomodate the heparin cap and place, and can utilize the design of hemostasis ring internal part elastic webbing to carry out the spacing processing of elasticity to the heparin cap, reduce and break away from, can make whole hemostasis ring break away from keeping somewhere the needle after keeping somewhere the needle and using the design of elastic tape after finishing simultaneously, be convenient for children wear as the bracelet as the toy, reduce infant and doctor direct nervous sense.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic top view of the joining cap of the present invention;

FIG. 3 is a schematic view of the internal structure of the heparin cap according to the present invention;

FIG. 4 is a rear view of the hemostatic ring of the present invention;

FIG. 5 is a schematic perspective view of an integral ring according to the present invention;

FIG. 6 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 7 is an enlarged view of the structure at B in FIG. 4 according to the present invention.

In the figure: 1. a needle sleeve; 2. a needle head; 3. a transparent three-way housing; 4. connecting the holding handle; 5. a friction plate; 6. an extension sleeve; 7. a rubber tube; 8. a hemostatic ring; 9. a connecting hose; 10. a positive pressure joint; 11. a side extension pipe; 12. an end cap; 13. a heparin cap; 14. joining the cap body; 15. an auxiliary component; 1501. an engagement cavity; 1502. a block is arranged inside; 1503. a connecting pin; 1504. a groove block is arranged inside; 16. a screw cap is arranged inside; 17. transferring the column; 18. a first limit plate; 19. an auxiliary disc; 20. a second limiting plate; 21. a hemostatic assembly; 2101. a groove body is arranged inside; 2102. connecting the columns; 2103. an external groove; 2104. a rubber pad; 22. connecting the sleeve plates; 23. a limiting slide way; 24. a transparent tee joint; 25. an elastic band; 26. connecting blocks; 27. a ring is integrated.

Detailed Description

Referring to fig. 1 to 7, the present invention provides a technical solution: the anti-blocking vein indwelling needle for children comprises a needle sleeve 1, a needle head 2, a transparent tee joint shell 3, a linking handle 4, a friction plate 5, an extension sleeve 6, a rubber tube 7, a hemostasis ring 8, a connecting hose 9, a positive pressure connector 10, a side extension tube 11, an end cap 12, a heparin cap 13, a linking cap body 14, an auxiliary component 15, a linking cavity 1501, a built-in block 1502, a linking needle 1503, a built-in groove block 1504, a built-in thread cover 16, a switching cylinder 17, a first limiting plate 18, an auxiliary disc 19, a second limiting plate 20, a hemostasis component 21, a built-in groove body 2101, a linking cylinder 2102, an external groove 2103, a rubber pad 2104, a linking sleeve plate 22, a limiting slideway 23, a transparent tee joint 24, an elastic band 25, a connecting block 26 and an integrated ring 27, wherein the needle head 2 is arranged inside the needle sleeve 1, the transparent tee joint shell 3 is installed at the left end of the needle head 2, the transparent tee joint shell 3 is locally and the transparent tee joint 24 is fixedly arranged inside the transparent tee joint shell 3, a limiting slide way 23 is arranged outside a transparent tee joint 24, a connecting sleeve plate 22 is rotatably arranged outside the limiting slide way 23, the upper end of the connecting sleeve plate 22 is connected with a connecting handle 4, a friction plate 5 is positioned on the outer surface of the connecting handle 4, the left end of the connecting handle 4 is connected with an extending sleeve 6, one end of the lower end of the transparent tee joint 24, which is close to a needle 2, is provided with a rubber tube 7, the lower end of the rubber tube 7 is provided with a connecting hose 9, the outside of the connecting hose 9 is provided with a blood stopping ring 8, the end part of the connecting hose 9 is provided with a positive pressure joint 10, the external thread of the positive pressure joint 10 is provided with a heparin cap 13, the upper end of the heparin cap 13 is provided with a connecting cap body 14, the right end of the positive pressure joint 10 is provided with a side extending pipe 11, and the outside of the side extending pipe 11 is provided with an end cap 12;

the operation is as follows specifically, can also utilize transparent tee bend 24 to protect transparent tee bend 24 for linking up when holding handle 4 and providing suitable rotation space through transparent tee bend shell 3 and the clearance that transparent tee bend 24 exists, linking up and holding handle 4 and can utilizing linking lagging 22 and spacing slide 23 interact to rotate, be favorable to carrying out the venipuncture to the infant according to doctor's use custom through the rotation of holding handle 4 to linking up, can make linking up after the puncture finishes and hold handle 4 and laminate through rotatory and skin surface, effectively avoid linking up and hold handle 4 and be in with skin non-laminating state after the puncture finishes, need hold the syringe needle 2 that handle 4 is connected and carry out the pivoted problem in the vein through rotating and linking up.

As shown in fig. 1 and 3, a built-in thread cover 16 is arranged in the middle of the heparin cap 13, the central axis of the heparin cap 13 coincides with the central axis of the built-in thread cover 16, and the diameter of the built-in thread cover 16 is smaller than that of the heparin cap 13;

through the design of the inside built-in screw cap 16 of heparin cap 13, can connect 10 when being connected at heparin cap 13 and malleation, the design of usable heparin cap 13 carries out the screw thread installation from the outside that malleation connects 10, the screw thread installation once more is carried out from the inside that malleation connects 10 to the inside built-in screw cap 16 of usable heparin cap 13 inside simultaneously, effectively reduce the bacterium and get into to the inside possibility of malleation joint 10, and simple structure, convenient to use person installs fast.

As shown in fig. 1 and 2, an auxiliary assembly 15 for sterilizing the outside of the engagement cap 14 and the outside of the heparin cap 13 is arranged inside the engagement cap 14, the auxiliary assembly 15 includes an engagement cavity 1501, a built-in block 1502, an engagement needle 1503 and a built-in slot block 1504, the built-in block 1502 is arranged inside the engagement cavity 1501, the engagement needle 1503 is fixedly arranged inside the built-in block 1502, the built-in slot block 1504 is arranged at one end of the outside of the engagement needle 1503, which is far away from the built-in block 1502, the built-in slot block 1504 is in an isosceles trapezoid structure, the inside of the built-in slot block 1504 is in a hollow structure, the shape structure of the inside of the built-in slot block 1504 is matched with the shape result of the outside of the engagement needle 1503, the engagement cavity 1501 is annularly distributed about the center of the engagement cap 14, and the inside of the engagement cavity 1501 is in a hollow structure;

before using heparin cap 13, the accessible fingertip position exerts the effect of power to linking chamber 1501 that the material is the PVC material, thereby link up linking needle 1503 in the inside built-in block 1502 of chamber 1501 and exert the effect of power to built-in groove piece 1504, it can be punctured to link up chamber 1501, thereby place in advance that the inside medical alcohol of built-in block 1502 can spill over because of linking two of rupture of chamber 1501, can show to heparin cap 13 and linking cap body 14 outside and carry out the disinfection processing of disinfecting, thereby can take away the use to heparin cap 13 and linking cap body 14 after the disinfection is over again, further reduce the possibility that the bacterium got into, and link up the chamber 1501 and be provided with the multiunit, thereby the user can be according to the number of times of use selectivity of keeping somewhere the needle and puncture the processing.

As shown in fig. 1, 4 and 5, a first limiting plate 18 is arranged inside the hemostasis ring 8, two adapter cylinders 17 are arranged at the upper end and the lower end inside the hemostasis ring 8, an auxiliary disc 19 is arranged at the end, far away from the adapter cylinders 17, of the hemostasis ring 8, a second limiting plate 20 is arranged at the end, far away from the first limiting plate 18, of the hemostasis ring 8, the second limiting plate 20 and the first limiting plate 18 are located on the same central axis, an integrated ring 27 is arranged inside the second limiting plate 20, a hemostasis assembly 21 for hemostasis is arranged inside the auxiliary disc 19, the hemostasis assembly 21 comprises an inner groove body 2101, an engagement cylinder 2102, an outer groove 2104 3 and a rubber pad, the lower end of the inner groove body 2101 is provided with the engagement 2102, the outer groove 2103 is arranged outside the cylinder body 2102, two ends inside the outer groove 2103 are both connected with the rubber pad 2104, the inner portion of the inner groove body 2101 is of a hollow cylindrical structure, the inner trough 2101 and the connecting cylinder 2102 are of an integrated structure, and the shape structure of the outer part of the connecting cylinder 2102 is matched with the shape structure of the inner part of the outer trough 2103;

the connecting hose 9 can be placed in the first limiting plate 18 and the second limiting plate 20 in the hemostasis ring 8, when hemostasis treatment is needed, the built-in groove body 2101 in the integrated ring 27 can be pressed, the built-in groove body 2101 can be quickly clamped in the built-in groove 2103, the connecting hose 9 penetrating into the limiting plates can be positioned by the aid of the downward pressing design of the built-in groove body 2101, internal liquid cannot circulate, hemostasis is achieved, the structure is simple, a user can operate the hemostasis device quickly, the user can draw out a part of the connecting hose 9 from the hemostasis ring 8 according to the requirement of the hemostasis position, the hemostasis treatment can be repeated again, meanwhile, the whole hemostasis ring 8 can be bent, and the first limiting plate 18 is clamped in one side of the second limiting plate 20, with this can realize dual hemostasis to coupling hose 9 and handle, the hemostasis mode is various, and convenient to use person handles according to actual required hemostasis, can also reduce stifled pipe problem simultaneously, improves the tube sealing effect.

As shown in fig. 1 and 7, the upper and lower ends inside the hemostatic ring 8 are provided with elastic bands 25, and the left and right ends outside the elastic bands 25 are provided with connecting blocks 26, and the connecting blocks 26 are connected with the hemostatic ring 8 in a clamping manner;

can pass heparin cap 13 to the well of hemostasis ring 8 after keeping somewhere the needle and using the end, thereby can utilize the design of hemostasis ring 8 to carry out spacing processing to heparin cap 13, it is fixed to avoid the user to use medical sticky tape to paste heparin cap 13, reduce the problem that the sticky tape weakens when using for a long time, be convenient for accomodate the placement to heparin cap 13, and can utilize the design of the inside elastic webbing 25 of hemostasis ring 8 to carry out the spacing processing of elasticity to heparin cap 13, reduce and break away from, can utilize the design of elastic webbing 25 to make whole hemostasis ring 8 break away from keeping somewhere the needle after keeping somewhere the needle and using the end simultaneously, be convenient for children wear as the bracelet as the toy, reduce infant and the direct nervous sense of doctor.

In conclusion, when the anti-blocking intravenous children indwelling needle is used, firstly, through the design of the internal thread cover 16 of the heparin cap 13, when the heparin cap 13 is connected with the positive pressure joint 10, the external thread installation can be carried out from the positive pressure joint 10 by using the design of the heparin cap 13, meanwhile, the internal thread cover 16 in the heparin cap 13 can be used for carrying out the thread installation again from the internal part of the positive pressure joint 10, the possibility that bacteria enter the internal part of the positive pressure joint 10 is effectively reduced, then, a proper rotating space can be provided for the connection holding handle 4 through the gap between the transparent tee joint shell 3 and the transparent tee joint 24, meanwhile, the transparent tee joint shell 3 can be protected by using the design of the transparent tee joint shell 3, the connection holding handle 4 can rotate by using the interaction of the connection sleeve plate 22 and the limit slide way 23, the vein puncture can be favorably carried out on children according to the using habits of doctors by rotating the connection holding handle 4, the connecting handle 4 can be attached to the surface of the skin through rotation after the puncture is finished, the problem that the connecting handle 4 is not attached to the skin after the puncture is finished and the needle 2 connected with the connecting handle 4 needs to rotate in the vein through rotation is effectively solved, after the puncture is finished and the heparin cap 13 needs to be used again, before the heparin cap 13 is used, a force can be applied to the connecting cavity 1501 made of PVC material through the fingertip part, so that the connecting needle 1503 in the built-in block 1502 in the connecting cavity 1501 applies force to the built-in groove block 1504, the connecting cavity 1501 can be punctured, medical alcohol placed in the built-in block 1501 in advance overflows due to the fracture of the connecting cavity 1501, sterilization treatment can be performed on the outer surfaces of the heparin cap 13 and the connecting cap body 1502, therefore, the heparin cap 13 and the linking cap body 14 can be taken away for use after sterilization and disinfection are finished, the possibility of bacteria entering is further reduced, and the linking cavity 1501 is provided with a plurality of groups, so that a user can selectively puncture the indwelling needle according to the use times of the indwelling needle, then the connecting hose 9 can be placed in the connecting hose through the design of the first limiting plate 18 and the second limiting plate 20 inside the hemostatic ring 8, when the hemostatic treatment is required, the internal groove body 2101 inside the integrated ring 27 can be quickly clamped inside the external groove 2103 by pressing the internal groove body 2101, so that the connecting hose 9 penetrating into the limiting plate can be positioned by utilizing the downward pressing design of the internal groove body 2101, the internal liquid cannot flow, the hemostasis is realized, the structure is simple, the operation is convenient for the user to quickly carry out, and the user can draw out a part of the connecting hose 9 from the hemostatic ring 8 according to the hemostatic position, then the operation can be repeated again to perform hemostasis treatment, and simultaneously the whole hemostasis ring 8 can be bent to ensure that the first limiting plate 18 is clamped at one side of the second limiting plate 20, so that the double hemostasis treatment can be realized on the connecting hose 9, the tube sealing effect is improved, finally, a user can penetrate the heparin cap 13 into the hemostasis ring 8 after the use of the indwelling needle is finished, so that the heparin cap 13 can be limited by utilizing the design of the hemostasis ring 8, the problem that the heparin cap 13 is stuck and fixed by using a medical adhesive tape by the user is avoided, the problem that the viscosity is weakened when the adhesive tape is used for a long time is reduced, the heparin cap 13 is convenient to store and place, the heparin cap 13 can be elastically limited by utilizing the design of the elastic tape 25 in the hemostasis ring 8, the separation is reduced, and simultaneously, the whole hemostasis ring 8 can be separated from the indwelling needle by utilizing the design of the elastic tape 25 after the use of the indwelling needle is finished, the child can conveniently wear as a toy as a bracelet.

Claims

1. Prevent stifled vein children and keep somewhere needle, its characterized in that, including needle cover (1) and friction plate (5), the inside of needle cover (1) is provided with syringe needle (2), and the left end of syringe needle (2) installs transparent tee bend shell (3), the inside local fixed transparent tee bend (24) that is provided with of transparent tee bend shell (3), and the outside of transparent tee bend (24) is provided with spacing slide (23), the outside rotation of spacing slide (23) is installed and is linked up lagging (22), the upper end of linking lagging (22) is connected with the linking and holds handle (4), friction plate (5) are located the linking and hold the outside surface of handle (4), the left end that the handle (4) was held in the linking is connected with and extends cover (6), rubber tube (7) are installed to the one end that transparent tee bend (24) lower extreme is close to syringe needle (2), and the lower extreme of rubber tube (7) is provided with coupling hose (9), the outside of coupling hose (9) is provided with hemostasis ring (8), malleation joint (10) are installed to the tip of coupling hose (9), and the outside screw thread of malleation joint (10) is provided with heparin cap (13), the linking cap body (14) is installed to the upper end of heparin cap (13), the right-hand member of malleation joint (10) is provided with side extension pipe (11), and the outside of side extension pipe (11) is provided with end cap (12).

2. The child anti-clogging intravenous indwelling needle according to claim 1, wherein the heparin cap (13) is provided at the middle with a built-in thread cap (16), and the central axis of the heparin cap (13) coincides with the central axis of the built-in thread cap (16), and the diameter of the built-in thread cap (16) is smaller than the diameter of the heparin cap (13).

3. The anti-blocking vein children indwelling needle according to claim 1, wherein an auxiliary assembly (15) for sterilizing the outside of the engagement cap (14) and the heparin cap (13) is arranged inside the engagement cap (14), the auxiliary assembly (15) comprises an engagement cavity (1501), a built-in block (1502), an engagement needle (1503) and a built-in slot block (1504), the built-in block (1502) is arranged inside the engagement cavity (1501), the engagement needle (1503) is fixedly installed inside the built-in block (1502), and the built-in slot block (1504) is arranged at one end of the outside of the engagement needle (1503) far away from the built-in block (1502).

4. The child anti-clogging intravenous indwelling needle according to claim 3, wherein the shape of the built-in notch block (1504) is an isosceles trapezoid structure, the inside of the built-in notch block (1504) is a hollow structure, and the shape structure of the inside of the built-in notch block (1504) matches the shape structure of the outside of the engaging needle (1503).

5. The child anti-blocking intravenous indwelling needle according to claim 3, wherein the engaging cavity (1501) is annularly distributed about the center of the engaging cap (14), and the inside of the engaging cavity (1501) is a hollow structure.

6. The anti-blocking vein children indwelling needle according to claim 1, wherein a first limiting plate (18) is arranged inside the hemostasis ring (8), two adapting cylinders (17) are arranged at the upper end and the lower end inside the hemostasis ring (8), and the number of the adapting cylinders (17) is two.

7. The anti-blocking vein children indwelling needle according to claim 1, wherein an auxiliary disc (19) is installed at one end of the hemostasis ring (8) far away from the adapter cylinder (17), a second limiting plate (20) is arranged at one end of the hemostasis ring (8) far away from the first limiting plate (18), the second limiting plate (20) and the first limiting plate (18) are located on the same central axis, and an integrated ring (27) is arranged inside the second limiting plate (20).

8. The anti-blocking intravenous children indwelling needle according to claim 7, wherein a hemostatic assembly (21) for hemostasis is arranged inside the auxiliary disc (19), the hemostatic assembly (21) comprises an internal groove body (2101), a linking cylinder (2102), an external groove (2103) and a rubber pad (2104), the linking cylinder (2102) is installed at the lower end of the internal groove body (2101), the external groove (2103) is installed outside the linking cylinder (2102), and the rubber pad (2104) is connected to both ends inside the external groove (2103).

9. The anti-blocking vein children indwelling needle according to claim 8, wherein the inside of the built-in groove body (2101) is of a hollow cylindrical structure, the built-in groove body (2101) and the engagement cylinder (2102) are of an integrated structure, and the shape structure of the outside of the engagement cylinder (2102) is matched with the shape structure of the inside of the external groove (2103).

10. The anti-blocking vein children indwelling needle according to claim 1, wherein the upper and lower ends of the inside of the hemostasis ring (8) are provided with elastic bands (25), the left and right ends of the outside of the elastic bands (25) are provided with connecting blocks (26), and the connecting blocks (26) are connected with the hemostasis ring (8) in a clamping manner.