CN215780621U

CN215780621U - Auxiliary fixing device for needle head of insulin injection pen

Info

Publication number: CN215780621U
Application number: CN202122196546.7U
Authority: CN
Inventors: 张菊; 王玉冰
Original assignee: Nanjing Childrens Hospital of Nanjing Medical University
Current assignee: Nanjing Childrens Hospital of Nanjing Medical University
Priority date: 2021-09-10
Filing date: 2021-09-10
Publication date: 2022-02-11
Anticipated expiration: 2031-09-10

Abstract

The application discloses supplementary fixing device of insulin injection pen needle, including pen tube, end, display window, external screw thread, thread bush, protective sheath, connecting axle, flange, spacing ring, needle file, syringe needle, needle tubing, movable sleeve, spout, slider, opening, buckle, briquetting, gag lever post, wedge, spring, draw-in groove and recess. The auxiliary fixing device for the insulin pen needle can fix the needle when the insulin pen is used, the thread sleeve is connected with the pen tube, the needle can be protected, the depth of the needle tube penetrating into skin can be adjusted, and the injection stability is improved; the movable sleeve can be quickly fixed along with the placement of the needle head, so that the needle head is convenient to mount, and the needle head can be automatically taken out by taking down the auxiliary device; can replace original needle guard cap, can not stab the finger when taking off the syringe needle, also can change at every turn, and small and exquisite can replace needle guard cap to exert a function simultaneously and avoid appearing the infection.

Description

Auxiliary fixing device for needle head of insulin injection pen

Technical Field

The application relates to the technical field of insulin pen application, in particular to an auxiliary fixing device for a needle head of an insulin injection pen.

Background

The insulin pen is a pen for insulin injection, and the insulin pen can remove the loaded down with trivial details process of extracting insulin in the insulin medicine bottle with the syringe from the sick friend, can remove the embarrassment of sick friend's insulin injection in public occasion from, and the sick friend who is blind even for the eyesight injects insulin and brings convenience, repeatedly usable's insulin pen: after the pen core is used up, the pen core is replaced for reuse, the insulin pen can be used for many years, even for the whole life, the convenience is realized, the tedious process that a patient uses an injector to extract insulin from an insulin medicine bottle is avoided, the patient does not need to take a large pile of articles such as the injector, the insulin medicine bottle and sterilized absorbent cotton when going out, the insulin injection process is simpler and more concealed, the insulin dosage is more accurate, and the insulin dosage can be adjusted by 1 unit. The syringe is generally accurate to 2 units at the minimum, is basically painless, has a thinner needle than that of a special insulin syringe, and is considered to be basically painless by some patients after use.

When children, particularly infants with type 1 diabetes mellitus are injected with insulin, the body is involuntarily twisted due to fear of injection operation or the injection is tense by parents of new hands, so that the injection needle head moves subcutaneously after being punctured into the skin, the pain of the infants is aggravated, and the probability or risk of needle breakage and needle bending is increased. Therefore, the auxiliary fixing device for the needle head of the insulin injection pen is provided for solving the problems.

Disclosure of Invention

The insulin injection pen needle auxiliary fixing device is provided in the embodiment and used for solving the problem that an insulin pen needle in the prior art is not easy to fix.

According to one aspect of the application, an auxiliary fixing device for a needle head of an insulin injection pen is provided and comprises a pen tube, a tip, a threaded sleeve, a protective sleeve, a needle seat and a movable sleeve;

the utility model discloses a writing brush, including pen tube, threaded sleeve, protective sheath, end, needle file, buckle, movable sleeve, draw-in groove, the pen tube top is equipped with or the fixedly connected with end, the inside protective sheath activity of thread bush cup joints, the protective sheath top is equipped with the flange, flange fixed surface is connected with the spacing ring, end top fixedly connected with needle file, the needle file bottom is equipped with or is connected with the buckle, be equipped with the movable sleeve between needle file and the protective sheath, the inside spout of having seted up of movable sleeve, inside and the slider sliding connection of spout, slider and protective sheath inner wall fixed connection, the inside and the gag lever post that run through of movable sleeve peg graft, gag lever post tip fixedly connected with wedge, the wedge passes through spring and the inside fixed connection of movable sleeve, the draw-in groove has been seted up to the movable sleeve bottom, the inside and the buckle joint of draw-in groove.

Furthermore, an external thread is formed in the top end of the end head and is in threaded connection with the threaded sleeve, and a display window is fixedly connected to the surface of the end head.

Furthermore, the edge of the bottom end of the protective sleeve is provided with or fixedly connected with a connecting shaft, the connecting shaft is connected with the inner part of the top end of the threaded sleeve in an embedded mode, and the connecting shaft is rotatably connected with the threaded sleeve.

Further, the protective sheath cup joints with the activity of end surface, the protective sheath external diameter is less than the flange external diameter, the inside slider that is equipped with two symmetric distributions of protective sheath.

Further, the movable sleeve is connected with the inner wall of the protective sleeve and the outer wall of the needle seat in a sliding mode, two symmetrically distributed sliding grooves are formed in two sides of the movable sleeve, the cross section of each sliding groove is of a T-shaped structure, and a sliding block of the T-shaped structure is arranged inside each sliding groove.

Further, the needle file is located end top middle part, needle file and the inside intercommunication of end, the needle file is inside to cup joint with the syringe needle activity, syringe needle tip fixedly connected with needle tubing.

Furthermore, two openings which are symmetrically distributed are formed in the top end of the needle base, the openings are connected with the pressing block in a sliding mode, the pressing block is fixedly connected with the inner wall of the top end of the movable sleeve, and the pressing block is in contact with the two ends of the needle head.

Furthermore, the outer surface of the movable sleeve is connected with the wedge-shaped block in an embedded mode, two ends of the movable sleeve are connected with the limiting rod in a sliding mode, and the limiting rod is in contact with the top end of the needle head.

Further, wedge one end is equipped with the inclined plane, the wedge is connected with protective sheath inner wall gomphosis, the recess has been seted up on the protective sheath top, inside and the wedge sliding connection of recess.

Furthermore, the top end of the pressing block corresponds to a limiting rod, the number of the pressing blocks and the number of the wedge-shaped blocks are two, and the two pressing blocks and the two wedge-shaped blocks are respectively located on the periphery of the movable sleeve.

Through the above-mentioned embodiment of this application, the auxiliary fixture of insulin pen syringe needle has been adopted, the difficult fixed problem of syringe needle in the insulin pen use has been solved, adopt the thread bush to be connected with the pen tube, can realize the protection to the syringe needle, fixing device can play fixed syringe needle and hidden needle function, take off the syringe needle in the meantime for protecting the needle cap, the original material consumption who protects the needle cap has been reduced, it avoids appearing the infection to run out the change at every turn, adopt fixing device to carry out the fixed of syringe needle, can make things convenient for taking off of syringe needle simultaneously, avoid direct touching and lead to the finger to prick easily, also can change at every turn, small and exquisite cleanness can replace the needle cap of protecting and exert the effect simultaneously, reduce raw and other materials and use.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is an overall perspective view of an embodiment of the present application;

FIG. 2 is a schematic front view of an embodiment of the present application;

FIG. 3 is a schematic side view of an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 2 according to an embodiment of the present disclosure;

FIG. 5 is a schematic external elevation view of an embodiment of the present application;

fig. 6 is a schematic top view of an embodiment of the present application.

In the figure: 1. the pen tube comprises a pen tube body, 2, an end socket, 3, a display window, 4, external threads, 5, a threaded sleeve, 6, a protective sleeve, 7, a connecting shaft, 8, a flange, 9, a limiting ring, 10, a needle seat, 11, a needle head, 12, a needle tube, 13, a movable sleeve, 14, a sliding groove, 15, a sliding block, 16, an opening, 17, a buckle, 18, a pressing block, 19, a limiting rod, 20, a wedge-shaped block, 21, a spring, 22, a clamping groove, 23 and a groove.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The auxiliary fixture in this embodiment can be applied to various auxiliary fixtures, for example, the following insulin pen needle is provided in this embodiment, and the auxiliary fixture in this embodiment can be used for the following insulin pen needle.

The insulin injection device comprises a needle base and a needle tube assembly base arranged on the needle base, wherein the needle tube assembly base is provided with a needle tube, the needle tube assembly base is arranged at the center of one end of the needle base, and the other end of the needle base is provided with an insulin pen assembly part matched with an insulin injection device; the outer side wall of the needle seat close to the needle tube assembling base end is also provided with at least one raised clamping column; the needle base is sleeved with a needle tube, the needle tube is sleeved with a trigger protector, the trigger protector is sleeve-shaped, two ends of the trigger protector are respectively an open machine end and a patient end far away from the machine end, a through hole for the needle tube to penetrate out is formed in the patient end, at least one guide groove matched with the needle tube on the needle base is formed in the side wall of the trigger protector, the guide groove is at least provided with an initial fixing part and a tail end fixing part, the initial fixing part is close to the patient end, the tail end fixing part is far away from the patient end, when the needle tube is located at the initial fixing part, the needle tube extends out of the trigger protector from the through hole, and when the needle tube is located at the tail end fixing part, the needle tube is located in the trigger protector; the spring is arranged between the needle seat and the trigger protector, and the direction of the elastic force of the spring is the same as the axial direction of the trigger protector; the clamping column on the needle seat is embedded in the guide groove on the trigger protector so as to movably connect the needle seat with the trigger protector. Furthermore, a clamping piece is arranged outside the needle base, and the clamping piece is provided with an elastic claw which can be matched with the trigger protector; when the card post is located during the initial fixed part, jack catch chucking cooperation is on the outer wall at trigger protector machine end top position, works as when the card post is located terminal fixed part, the jack catch is located trigger protector machine end bottom below or with trigger protector machine end bottom edge chucking cooperation. Further, the guide groove comprises a first guide section, a second guide section and a transition section connected between the first guide section and the second guide section, wherein the starting end of the first guide section is an initial fixing part, the tail end of the first guide section is connected to the starting end of the transition section, the tail end of the transition section is connected to the starting end of the second guide section, and the tail end of the second guide section is a tail end fixing part; the first guide section starting end is further from the patient end than the first guide section end, and the second guide section end is closer to the machine end than the second guide section starting end. Further, at least one of the initial fixing part and the end fixing part is provided with a one-way access structure. Furthermore, the one-way access structure is a locking mechanism or an elastic tongue piece. Furthermore, an annular cavity is arranged between the needle tube assembly base and the side wall of the needle seat, a boss extending downwards is arranged inside the patient end of the trigger protector, one end of the spring is arranged in the annular cavity on the needle seat, and the other end of the spring is arranged on the boss inside the patient end of the trigger protector. Furthermore, an included angle between the central axis direction of the transition section of the guide groove and the axis direction of the trigger protector is not more than 45 degrees. Furthermore, still include the shell, the shell is the cover barrel-shaped, locates needle file and trigger protector outside, one end is sealed and is equipped with the sleeve pipe that inwards extends and is used for protecting the needle tubing in inside. Furthermore, the clamping and fixing piece is provided with an installation base matched with the assembling part of the needle stand insulin pen, and the elastic clamping claws are arranged on the installation base; the outer side surface of the mounting base is provided with uniformly distributed raised lines or embedded grooves, and the inner side surface of the opening end of the shell is provided with embedded ports or raised lines matched with the raised lines or embedded grooves. Further, the housing is mounted on the mounting base of the fastener, and a sealing paper/film is arranged at the opening end to be adhered or sealed with the housing.

Of course, the present embodiment can also be used for auxiliary fixing devices of other structures. Here, description is not repeated, and the auxiliary fixing device according to the embodiment of the present application is described below.

Referring to fig. 1-6, the auxiliary fixing device for the needle of the insulin injection pen includes a pen tube 1, a tip 2, a threaded sleeve 5, a protective sleeve 6, a needle base 10 and a movable sleeve 13;

the top end of the pen tube 1 is provided with or fixedly connected with an end head 2, the interior of the threaded sleeve 5 is connected with a movable sleeve 13 of the protective sleeve 6, the top end of the protective sleeve 6 is provided with a flange 8, the surface of the flange 8 is fixedly connected with a limiting ring 9, the top end of the end head 2 is fixedly connected with a needle seat 10, the bottom end of the needle seat 10 is provided with or connected with a buckle 17, a movable sleeve 13 is arranged between the needle stand 10 and the protective sleeve 6, a sliding groove 14 is arranged inside the movable sleeve 13, the inside of the sliding chute 14 is connected with a sliding block 15 in a sliding way, the sliding block 15 is fixedly connected with the inner wall of the protective sleeve 6, the inner part of the movable sleeve 13 is inserted with a limiting rod 19 in a penetrating way, the end part of the limiting rod 19 is fixedly connected with a wedge-shaped block 20, the wedge-shaped block 20 is fixedly connected with the inside of the movable sleeve 13 through a spring 21, a clamping groove 22 is formed in the bottom of the movable sleeve 13, and the inside of the clamping groove 22 is clamped with the buckle 17.

The top end of the end head 2 is provided with an external thread 4, the external thread 4 is in threaded connection with a threaded sleeve 5, the surface of the end head 2 is fixedly connected with a display window 3, and the display window 3 is used for displaying the injection metering; the edge of the bottom end of the protective sleeve 6 is provided with or fixedly connected with a connecting shaft 7, the connecting shaft 7 is connected with the inside of the top end of the threaded sleeve 5 in an embedded mode, the connecting shaft 7 is rotatably connected with the threaded sleeve 5, and the connecting shaft 7 is used for connecting the threaded sleeve 5 and the protective sleeve 6 to realize relative rotation; the protective sleeve 6 is connected with a movable sleeve 13 on the surface of the end head 2, the outer diameter of the protective sleeve 6 is smaller than that of the flange 8, two symmetrically distributed sliding blocks 15 are arranged inside the protective sleeve 6, and the protective sleeve 6 is used for protecting a needle head 11 and can realize a needle hiding function; the movable sleeve 13 is connected with the inner wall of the protective sleeve 6 and the outer wall of the needle base 10 in a sliding manner, two symmetrically distributed sliding grooves 14 are formed in two sides of the movable sleeve 13, the cross section of each sliding groove 14 is of a T-shaped structure, a sliding block 15 of the T-shaped structure is arranged inside each sliding groove 14, and the movable sleeve 13 can move due to the matching of the sliding block 15 and the sliding groove 14, so that the needle taking function is realized; the needle seat 10 is positioned in the middle of the top end of the end head 2, the needle seat 10 is communicated with the interior of the end head 2, the interior of the needle seat 10 is connected with a movable sleeve 13 of the needle 11, the end part of the needle 11 is fixedly connected with a needle tube 12, and the needle seat 10 is used for installing the needle 11 so as to realize each replacement of the needle 11; the top end of the needle base 10 is provided with two symmetrically distributed openings 16, the inside of each opening 16 is in sliding connection with a pressing block 18, the pressing blocks 18 are fixedly connected with the inner wall of the top end of the movable sleeve 13, the pressing blocks 18 are in contact with the two ends of the needle head 11, and the openings 16 are used for stable movement of the pressing blocks 18, so that the needle head 11 is fixed; the outer surface of the movable sleeve 13 is connected with the wedge-shaped block 20 in an embedded mode, two ends of the movable sleeve 13 are connected with the limiting rod 19 in a sliding mode, the limiting rod 19 is in contact with the top end of the needle 11, and the wedge-shaped block 20 is used for pushing the limiting rod 19 to move so that the needle 11 can be taken down after the needle 11 is abutted; an inclined surface is arranged at one end of the wedge-shaped block 20, the wedge-shaped block 20 is connected with the inner wall of the protective sleeve 6 in an embedded mode, a groove 23 is formed in the top end of the protective sleeve 6, the inner portion of the groove 23 is connected with the wedge-shaped block 20 in a sliding mode, the limiting rod 19 can retract after the needle head 11 is fixed, and the needle head 11 can be ejected through movement of the limiting rod 19 after injection; the top end of the pressing block 18 corresponds to the limiting rod 19, the number of the pressing blocks 18 and the number of the wedge-shaped blocks 20 are two, the two pressing blocks 18 and the two wedge-shaped blocks 20 are respectively located on the periphery of the movable sleeve 13, and the needle 11 can be fixed by the pressing blocks 18.

When the utility model is used, a needle 11 is placed in a needle seat 10, a threaded sleeve 5 is connected on an external thread 4 in a threaded manner, the threaded sleeve 5 drives a protective sleeve 6 to move when rotating, so that the protective sleeve is sleeved on the surface of an end head 2, the movement of the protective sleeve 6 is realized through a connecting shaft 7, a needle tube 12 at one end of the needle 11 extends out of a limiting ring 9, a movable sleeve 13 is moved to a position between the protective sleeve 6 and the needle seat 10, a press block 18 at the top of the movable sleeve 13 moves to an opening 16 and supports against the needle 11, the protective sleeve 6 continues to move downwards, a slide block 15 moves in a sliding groove 14, when the slide block 15 moves to the bottom end of the sliding groove 14, the protective sleeve 6 drives the movable sleeve 13 to sleeve the needle seat 10 through the slide block 15, a clamping groove 22 is clamped in a clamping buckle 17, the limiting of the movable sleeve 13 is realized, the wedge block 20 moves to a groove 23 at the time, the press block 18 supports against the needle seat 11 to realize the sealing and the fixing between the needle 11 and the needle seat 10, during injection, the movable block moves due to the matching of the buckle 17 and the clamping groove 22, the threaded sleeve 5 is rotated to drive the protective sleeve 6 to move, the length of the needle 11 outside the limiting ring 9 is adjusted, the needle can be fixed on subcutaneous tissue of an injection part after the needle tube 12 is pricked into skin, the needle tube 12 can be prevented from moving subcutaneously during injection, the pain of a child patient is aggravated, and the probability and risk of needle breakage and needle bending are increased; after the injection is accomplished, continue to rotate thread bush 5, thread bush 5 promotes protective sheath 6 and removes, wedge 20 contact this moment removes and contacts protective sheath 6 inner wall from recess 23, make protective sheath 6 promote inside wedge 20 embedding movable sleeve 13, in spring 21 takes place the compression process, promote gag lever post 19 and remove and support syringe needle 11 department, when continuing to remove protective sheath 6, make slider 15 remove to the topmost of spout 14, the removal of protective sheath 6 this moment drives slider 15 and supports movable sleeve 13, and promote its removal, make behind buckle 17 and the separation of draw-in groove 22, drive movable sleeve 13 and remove simultaneously, movable sleeve 13 realizes taking out of syringe needle 11 through gag lever post 19, realize taking off of syringe needle 11 along with taking off of thread bush 5, conveniently carry out fast operation.

The application has the advantages that:

1. the auxiliary fixing device for the insulin pen needle can fix the needle when the insulin pen is used, the needle is connected with the pen tube through the threaded sleeve, the needle can be protected, the depth of the needle tube penetrating into the skin can be adjusted, the needle tube can be kept in the injection process, and the injection stability is improved;

2. the movable sleeve can be quickly fixed along with the placement of the needle head, so that the needle head is convenient to mount, the use convenience is improved, the needle head can be automatically taken out through the taking-off of the auxiliary device after the injection is finished, and the operation is convenient;

3. this application can replace original needle guard cap, can not stab the finger when taking off the syringe needle, also can change at every turn, and small and exquisite simultaneously can replace needle guard cap to play a role, reduces raw and other materials and uses, avoids appearing the infection.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Insulin injection pen needle auxiliary fixture, its characterized in that: comprises a pen tube (1), an end (2), a threaded sleeve (5), a protective sleeve (6), a needle seat (10) and a movable sleeve (13);

the pen tube is characterized in that the top end of the pen tube (1) is provided with or fixedly connected with an end socket (2), the interior of the thread bush (5) is connected with a movable sleeve (13) of the protective sleeve (6), the top end of the protective sleeve (6) is provided with a flange (8), the surface of the flange (8) is fixedly connected with a limiting ring (9), the top end of the end socket (2) is fixedly connected with a needle seat (10), the bottom end of the needle seat (10) is provided with or connected with a buckle (17), the movable sleeve (13) is arranged between the needle seat (10) and the protective sleeve (6), a sliding groove (14) is formed in the movable sleeve (13), the interior of the sliding groove (14) is in sliding connection with a sliding block (15), the sliding block (15) is fixedly connected with the inner wall of the protective sleeve (6), the interior of the movable sleeve (13) is in penetrating and inserting connection with a limiting rod (19), and the end part of the limiting rod (19) is fixedly connected with a wedge block (20), wedge block (20) pass through spring (21) and the inside fixed connection of movable sleeve (13), draw-in groove (22) have been seted up to movable sleeve (13) bottom, draw-in groove (22) inside and buckle (17) joint.

2. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: external screw thread (4) have been seted up on end (2) top, external screw thread (4) and thread bush (5) threaded connection, end (2) fixed surface is connected with display window (3).

3. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: the edge of the bottom end of the protective sleeve (6) is provided with or fixedly connected with a connecting shaft (7), the connecting shaft (7) is connected with the inner portion of the top end of the threaded sleeve (5) in an embedded mode, and the connecting shaft (7) is rotatably connected with the threaded sleeve (5).

4. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: protective sheath (6) and end (2) surface movable sleeve (13) connect, protective sheath (6) external diameter is less than flange (8) external diameter, inside slider (15) that are equipped with two symmetric distributions of protective sheath (6).

5. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: the needle holder is characterized in that the movable sleeve (13) is connected with the inner wall of the protective sleeve (6) and the outer wall of the needle seat (10) in a sliding mode, two symmetrically distributed sliding grooves (14) are formed in two sides of the movable sleeve (13), the cross section of each sliding groove (14) is of a T-shaped structure, and a sliding block (15) of the T-shaped structure is arranged inside each sliding groove (14).

6. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: needle file (10) are located end (2) top middle part, needle file (10) and end (2) inside intercommunication, needle file (10) inside and syringe needle (11) movable sleeve (13) connect, syringe needle (11) tip fixedly connected with needle tubing (12).

7. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: two symmetrically distributed openings (16) are formed in the top end of the needle base (10), the inside of each opening (16) is in sliding connection with a pressing block (18), the pressing blocks (18) are fixedly connected with the inner wall of the top end of the movable sleeve (13), and the pressing blocks (18) are in contact with the two ends of the needle head (11).

8. The auxiliary fixing device for the needle of the insulin injection pen according to claim 1, wherein: the outer surface of the movable sleeve (13) is connected with the wedge-shaped block (20) in an embedded mode, two ends of the movable sleeve (13) are connected with the limiting rod (19) in a sliding mode, and the limiting rod (19) is in contact with the top end of the needle head (11).

9. The auxiliary fixing device for the needle of the insulin injection pen according to claim 8, wherein: wedge (20) one end is equipped with the inclined plane, wedge (20) are connected with protective sheath (6) inner wall gomphosis, protective sheath (6) top is seted up flutedly (23), inside and wedge (20) sliding connection of flutedly (23).

10. The auxiliary fixing device for the needle of the insulin injection pen according to claim 7, wherein: the top end of the pressing block (18) corresponds to a limiting rod (19), the number of the pressing block (18) and the number of the wedge-shaped blocks (20) are two, and the two pressing blocks (18) and the two wedge-shaped blocks (20) are respectively located on the periphery of the movable sleeve (13).