CN204995929U - Take insulin injection needle of needle point protection - Google Patents

Abstract

The utility model relates to a take insulin injection needle of needle point protection, including needle body, needle file, the main casing body, oversheath, characterized by: the injection section of needle body before internal trigger tube, preceding sleeve pipe and the spring of being equipped with of main casing, trigger tube are used for protecting and use, the effective injection section of protecting use back needle body of protheca. Before the use, the trigger tube stretches out and is in protection needle body state from the main casing body, and that preceding sleeve pipe lies in the main casing is internal, use the back, it is internal that the trigger tube lies in the main casing, and preceding sleeve pipe stretches out and be in protection needle body state from the main casing body. The utility model discloses get up trigger tube and preceding sheathed tube unblock with the state relevance whether injection needle gets ready to inject, utilize tail -hood and needle file to trigger trigger tube and preceding sleeve pipe unblock during the installation, improved the security and the convenience that use.

Description

With the injection of insulin syringe needle of needle point protection

Technical field

This utility model relates to medical injection of insulin instrument, particularly a kind of single use and band needle point protection safe injection of insulin syringe needle.This injection needle and novopen support the use and can be used for automedication or other people administration, and wherein novopen is reusable, and injection needle is single use syringe needle.

Background technology

The metabolic disease of diabetes to be a kind of with hyperglycemia be feature, there is no the method for radical cure at present, but gives patient's insulin injection can effective symptom management.

The injection tool of insulin is varied; wherein injection of insulin syringe needle described in the utility model is a kind of and the matching used injection tool of novopen; wherein novopen carries the insulin fluid medicine of ormal weight; reusable, and injection needle is a kind of single use syringe needle with safety guard.

Chinese patent CN101563124A discloses the application for a patent for invention that a kind of name is called " needle protection with distally and proximal needle protector "; US Patent No. 2011/0288491A1 discloses the application for a patent for invention that a kind of name is called " safety needle assembly ".These two patent applications all relate to injection of insulin syringe needle, and its basic structure includes:

1. for the needle body of insulin injection and the needle stand of fixing needle body;

2. be used for the main casing be connected with novopen;

3. the sleeve pipe of safety before and after using for the protection of needle body;

4. for the spring of mobile sleeve pipe;

5., for the protection of the oversheath of injection needle entirety, this oversheath does not embody in the accompanying drawing of above-mentioned two pieces patent, but can see in actual product, and indispensable under normal circumstances.

In above-mentioned existing injection needle, from the operator guards of needle body, the former injection needle is provided with front-end protection structure and rear end operator guards, and the latter's injection needle is only provided with front-end protection structure.This utility model, from the safety used and convenience angle, designs the injection of insulin syringe needle of the band needle point protection of a new structure.

Summary of the invention

The injection of insulin syringe needle that this utility model provides a kind of band needle point of new structure to protect, is intended to enrich injection of insulin syringe needle product form, improves injection of insulin syringe needle properties of product.

For achieving the above object, the first technical scheme that this utility model adopts is (the needle point protection of band front-end and back-end): a kind of injection of insulin syringe needle with needle point protection, comprising:

Needle body, this needle body has the injection portion of a forward end direction extension, the linkage section of a direction extension to the back-end and a canned paragraph between injection portion and linkage section;

Needle stand, this needle stand is used for fixing needle body, and the canned paragraph of described needle body is fixed on needle stand, and the injection portion of needle body is stretched out from needle stand front end, and the linkage section of needle body stretches out from needle stand rear end;

Main casing, this main casing is tube structure, and needle stand and needle body are positioned at main casing in the assembled condition, and the rear end of main casing is for connecting novopen;

Its innovation is:

Described needle stand is made up of attic base and seat bar, and seat bar is positioned at attic base front end and is fixedly connected with attic base; Attic base is provided with two slots to make way, the outer rim of attic base matches with the inner edge of main casing, corresponding attic base outer rim is interval with the first position location and the second position location vertically on main casing inner edge, be installed in the process of described novopen at described injection needle, utilize novopen head to force attic base to move forward to the second position location vertically from the first position location in main casing to the axial thrust that needle stand produces, thus make the annexation forming location of sliding between needle stand and main casing; On the first position location, the outer rim of attic base is coordinated by the first location structure with the inner edge of main casing, and on the second position location, the outer rim of attic base is coordinated by the second location structure with the inner edge of main casing; Described first location structure adopts concavo-convex location structure, elastic positioning structure or friction location structure; Described second location structure adopts concavo-convex location structure, elastic positioning structure, friction location structure, card lock bit architecture or end face against location structure;

Be provided with the first trip step in the middle part of described main casing cylinder inboard wall, main casing cylinder inboard wall front end is provided with the second trip step, and main casing cylinder inboard wall rear portion is provided with the 3rd trip step, and main casing cylinder inboard wall front portion is provided with anti-back slot;

Tail-hood, anterior cannula, trigger tube and spring is provided with in described main casing;

Described tail-hood is made up of a block and two forelegs, block is end cap or ring bodies, the central authorities of block are provided with the pin hole that allows only supplying needle body linkage section to intert, allow pin hole axis and main casing axis being parallel, two forelegs are fixedly connected on block front end, and to allow pin hole axis arrange for reference symmetry, the inner side of each foreleg is provided with inclined-plane on root position, medium position is provided with the block extended internally, terminal position is provided with haptic element hook; The outside of each foreleg is provided with wedge angle trip on medium position;

The agent structure of described anterior cannula is body, and the leading inside of anterior cannula is provided with inner face; The rear end of anterior cannula is provided with the elastic latch extended back and the elasticity empennage extended back, and elastic latch and elasticity empennage are staggeredly arranged in anterior cannula circumference; Be provided with outward extending projection outside the middle part of anterior cannula, projection and elastic latch are in anterior cannula circumferential position correspondence, and protruding elastic latch side of leaning on is provided with inclined plane;

The agent structure of described trigger tube is body, and the rear end of trigger tube is provided with two plugs extended back, and plug is provided with barb, and between trigger tube body and seat bar, side is provided with recess, and opposite side is provided with protuberance, and recess is stuck on protuberance and forms the 3rd location;

Before use under confined state, described attic base is in the first position location in main casing, tail-hood is positioned at main casing rear end, and the block on tail-hood is positioned at the linkage section of attic base rear for the protection of needle body, and two forelegs on tail-hood stretch to front through two slots to make way on attic base; Described anterior cannula is positioned at main casing, and on the first trip step on a main housing of the elastic latch card in anterior cannula, the relative main casing of restriction anterior cannula travels forward, and the haptic element hook simultaneously on tail-hood two forelegs hooks in the elastic latch of anterior cannula; Described trigger tube is positioned at main casing front end and extends to outside front end, for the protection of the injection portion of needle body, trigger tube is provided with relative to main casing move forward spacing, the rear sleeve of trigger tube is contained on the seat bar of needle stand, the rear portion of trigger tube is positioned at anterior cannula, trigger tube is on the 3rd position location, and now, the relative main casing of the attic base on needle stand is on the first position location; Described spring one end is resisted against on the block of tail-hood two forelegs, and the other end is resisted against on the inner face of anterior cannula;

In use, when described injection needle is installed to described novopen, the head of novopen promotes tail-hood and moves forward, the haptic element hook of tail-hood is by the inclined plane jack-up in anterior cannula projection, cross projection afterwards, the inclined-plane compressing elastic latch of tail-hood curves inwardly simultaneously, elastic latch and the first trip step is finally forced to break off relations, remove anterior cannula proal spacing in main casing, now under the promotion of spring, anterior cannula moves forward, until projection tackled by haptic element hook and stop mobile and to anterior cannula travel forward carry out spacing; Then, block on tail-hood against needle stand attic base and promote attic base and move forward to the second position location from the first position location, now because trigger tube is subject to moving forward spacing restriction, when needle stand moves forward, trigger tube and seat bar are removed the 3rd and are located, and formation is slidably connected; Then, as front end and the contact human skin of trigger tube, trigger tube moves backward, block on plug jack-up tail-hood now on trigger tube, forces the haptic element hook of tail-hood to be gradually separated with the projection of anterior cannula, until be completely separated after under the promotion of spring anterior cannula move forward, and stretch out main casing front end, the front end face of anterior cannula is hampered by human body skin, concordant with trigger tube front end face and together with move, until pin starts insulin injection after entering human body skin completely;

When extracting described injection needle from human body skin after a procedure, anterior cannula is released main casing front end by spring, until projection in anterior cannula is stopped stretching out forward by the second trip step interception on main casing, now anterior cannula is used for protecting the injection portion of needle body; Simultaneously the elasticity empennage of anterior cannula snaps in the anti-back slot of main casing after stretching and forms the spacing of anterior cannula movement backward, prevents anterior cannula rollback;

When removing described injection needle from described novopen head after a procedure, tail-hood moves backward under spring promotes, two blocks simultaneously on tail-hood clamp the plug on trigger tube, and drive trigger tube to move backward, stop until seat bar front end on needle stand is low by trigger tube inner front end face; Then; wedge angle trip on tail-hood fall into main casing the 3rd trip step formed tail-hood move forward spacing; and the barb of trigger tube plug coordinates with two blocks; be used for limiting tail-hood to move backward in main casing rear end; now tail-hood is used for protecting the linkage section of needle body, prevents described injection needle from being used by secondary simultaneously.

For achieving the above object, the second technical scheme that this utility model adopts is (being only with forward tip protection): a kind of injection of insulin syringe needle with needle point protection, comprising:

Needle body, this needle body has the injection portion of a forward end direction extension, the linkage section of a direction extension to the back-end and a canned paragraph between injection portion and linkage section;

Needle stand, this needle stand is used for fixing needle body, and the canned paragraph of described needle body is fixed on needle stand, and the injection portion of needle body is stretched out from needle stand front end, and the linkage section of needle body stretches out from needle stand rear end;

Main casing, this main casing is tube structure, and needle stand and needle body are positioned at main casing in the assembled condition, and the rear end of main casing is for connecting novopen;

Its innovation is:

Described needle stand is made up of attic base, seat bar and two forelegs, seat bar is positioned at attic base front end and is fixedly connected with attic base, two forelegs bar lateral symmetry of being present is arranged, the root of two forelegs is fixedly connected with attic base respectively, the inner side of each foreleg is provided with inclined-plane on root position, medium position is provided with the block extended internally, terminal position is provided with haptic element hook; The outer rim of attic base matches with the inner edge of main casing, corresponding attic base outer rim is interval with the first position location and the second position location vertically on main casing inner edge, be installed in the process of described novopen at described injection needle, utilize novopen head to force attic base to move forward to the second position location vertically from the first position location in main casing to the axial thrust that needle stand produces, thus make the annexation forming location of sliding between needle stand and main casing; On the first position location, the outer rim of attic base is coordinated by the first location structure with the inner edge of main casing, and on the second position location, the outer rim of attic base is coordinated by the second location structure with the inner edge of main casing; Described first location structure adopts concavo-convex location structure, elastic positioning structure or friction location structure; Described second location structure adopts concavo-convex location structure, elastic positioning structure, friction location structure, card lock bit architecture or end face against location structure;

Be provided with the first trip step in the middle part of described main casing cylinder inboard wall, main casing cylinder inboard wall front end is provided with the second trip step, and main casing cylinder inboard wall front portion is provided with anti-back slot;

Anterior cannula, trigger tube and spring is provided with in described main casing;

The agent structure of described anterior cannula is body, and the leading inside of anterior cannula is provided with inner face; The rear end of anterior cannula is provided with the elastic latch extended back and the elasticity empennage extended back, and elastic latch and elasticity empennage are staggeredly arranged in anterior cannula circumference; Be provided with outward extending projection outside the middle part of anterior cannula, projection and elastic latch are in anterior cannula circumferential position correspondence;

The agent structure of described trigger tube is body, and the rear end of trigger tube is provided with two plugs extended back, and plug is provided with barb, and between trigger tube body and seat bar, side is provided with recess, and opposite side is provided with protuberance, and recess is stuck on protuberance and forms the 3rd location;

Before use under confined state, described attic base is in the first position location in main casing, and two forelegs that attic base extends forward stretch to front; Described anterior cannula is positioned at main casing, and on the first trip step on a main housing of the elastic latch card in anterior cannula, the relative main casing of restriction anterior cannula travels forward; Described trigger tube is positioned at main casing front end and extends to outside front end, for the protection of the injection portion of needle body, trigger tube is provided with relative to main casing move forward spacing, the rear sleeve of trigger tube is contained on the seat bar of needle stand, the rear portion of trigger tube is positioned at anterior cannula, trigger tube is on the 3rd position location, and now, the relative main casing of the attic base on needle stand is on the first position location; Described spring one end is resisted against on the block of needle stand two forelegs, and the other end is resisted against on the inner face of anterior cannula;

In use, when described injection needle is installed to described novopen, the head of novopen promotes attic base and moves forward, inclined-plane compressing elastic latch inside foreleg curves inwardly, elastic latch and the first trip step is finally forced to break off relations, remove anterior cannula proal spacing in main casing, now under the promotion of spring, anterior cannula moves forward, until projection tackled by haptic element hook and stop mobile and to anterior cannula travel forward carry out spacing; Then, attic base moves forward to the second position location from the first position location, and now because trigger tube is subject to moving forward spacing restriction, when needle stand moves forward, trigger tube and seat bar are removed the 3rd and located, and formation is slidably connected; Meanwhile as front end and the contact human skin of trigger tube, trigger tube moves backward, block on plug jack-up foreleg now on trigger tube, the haptic element hook of foreleg is forced gradually to be separated with the projection of anterior cannula, until after being separated completely under the promotion of spring anterior cannula move forward, and stretch out main casing front end, the front end face of anterior cannula is hampered by human body skin, concordant with trigger tube front end face and together with move, until pin starts insulin injection after entering human body skin completely;

When extracting described injection needle from human body skin after a procedure, anterior cannula is released main casing front end by spring, until projection in anterior cannula is stopped stretching out forward by the second trip step interception on main casing, now anterior cannula is used for protecting the injection portion of needle body; Simultaneously the elasticity empennage of anterior cannula snaps in the anti-back slot of main casing after stretching and forms the spacing of anterior cannula movement backward, prevents anterior cannula rollback, finally removes described injection needle from described novopen head.

Related content in technique scheme is explained as follows:

1., in this utility model, " front " in described " front end ", " forward ", " front and back ", " front portion ", " front ", " front end face " refers to the direction of this utility model disposable safe type injection of insulin syringe needle injection portion needle point indication." afterwards " in described " rear end ", " front and back ", " backward ", " rear portion ", " rear " refers to the opposite direction of " front ".

2., in such scheme, described concavo-convex location structure to be coordinated with the convex tendon be located on main casing inner edge by the chase being located at attic base outer marginal circumference direction and is formed.

3., in such scheme, described elastic positioning structure is coordinated by elasticity pearl pin is formed with depression, elasticity pearl pin with cave in both in, one is located in attic base outer rim, and another one is located on main casing inner edge.

4., in such scheme, described friction location structure is formed by attic base outer rim and main casing inner edge frictional fit.

5., in such scheme, described card lock bit architecture to be coordinated with draw-in groove set on main casing inner edge by attic base outer rim and side end face, front and back and is formed.

6., in such scheme, described end face is formed against coordinating with the inner face of main casing inner edge against location structure by the anterior end surface of attic base outer rim.

7. in such scheme, be provided with oversheath outside described main casing, this oversheath is tube-in-tube structure, and under confined state, oversheath is sleeved on outside main casing before use, overall for the protection of described injection needle; Described trigger tube be provided with relative to main casing the spacing front end by trigger tube that moves forward close to or lean and formed on the inner front end face of oversheath.

This utility model design principle and effect are: this utility model relates to a kind of injection of insulin syringe needle with needle point protection; wherein; the first technical scheme above-mentioned is with forward tip protection and the protection of rear end needle point; and the second technical scheme is only with forward tip to protect, protect without rear end needle point.Front-end protection utilizes a trigger tube to protect the injection portion using front needle body, utilizes an anterior cannula to protect the injection portion using rear needle body.Before injection needle uses, trigger tube stretches out and is in protection needle body state from main casing, and anterior cannula is positioned at main casing; After injection needle uses, trigger tube is positioned at main casing, and anterior cannula is stretched out from main casing and be in protection needle body state.Rear end protection utilizes the tail-hood be arranged in main casing rear end to protect to use linkage section that is front and needle body after using.

This utility model gets up for the protection of the movement in main casing of the trigger tube of needle body, anterior cannula, foreleg and needle stand and positioning associated, and have employed following measures:

The first, between trigger tube body and seat bar, be provided with the 3rd location structure formed by concaveconvex structure, meanwhile, on the first trip step on a main housing of the elastic latch card in anterior cannula, the relative main casing of restriction anterior cannula travels forward.To solve before using and the integrity problem of trigger tube and anterior cannula protection needle body injection portion in using, ensure trigger tube and anterior cannula before use with use in security implementation available protecting to needle body injection portion;

Second, the annexation of locating of sliding is designed to by being used for fixing between the needle stand of needle body and main casing, namely stop after utilizing the axial thrust of novopen head to needle stand to force the attic base on needle stand to move forward to the second position location from the first position location when installing injection needle, thus the information whether be in place by injection needle associates with the shift position of the attic base on needle stand in main casing; Utilize the movement of foreleg to thread off to trigger anterior cannula simultaneously;

3rd, whether the information whether be in place by injection needle is unlocked after being located with trigger tube and anterior cannula by the shift position of attic base in main casing associates, whether unlock the state connection property whether being ready to novopen and injection needle inject behind trigger tube and anterior cannula location the most at last, thus substantially increase safety and the convenience of injection needle use.

In a word, trigger tube is made to reach the object of automatic unlocking to the axial thrust of needle stand and displacement when this utility model Appropriate application installs injection needle, utilize the movement of foreleg when installing injection needle to trigger anterior cannula to thread off simultaneously, its technical conceive is ingenious, design is reasonable, there is outstanding substantive distinguishing features and significant technological progress, fully demonstrated safety and the convenience of injection needle use.

Accompanying drawing explanation

Accompanying drawing 1 is the axonometric chart of this utility model embodiment injection of insulin syringe needle;

Accompanying drawing 2 is the three-dimensional exploded view of this utility model embodiment injection of insulin syringe needle;

Accompanying drawing 3 is the axonometric chart of this utility model embodiment tail-hood;

Accompanying drawing 4 is the axonometric chart of this utility model embodiment needle stand and needle body;

Accompanying drawing 5 is the axonometric chart of this utility model embodiment main casing band partial cutaway;

Accompanying drawing 6 is the axonometric chart of this utility model embodiment anterior cannula;

Accompanying drawing 7 is the axonometric chart of this utility model embodiment protheca pipe racks partial cutaway;

Accompanying drawing 8 is the axonometric chart of this utility model embodiment trigger tube;

Accompanying drawing 9 is the axonometric chart of this utility model embodiment triggering pipe racks partial cutaway;

Accompanying drawing 10 is the axonometric chart of this utility model embodiment oversheath band partial cutaway;

Accompanying drawing 11 is the end view of the injection of insulin syringe needle of this utility model example belt A-A cross-sectional indicator;

Accompanying drawing 12 is the end view of the injection of insulin syringe needle of this utility model example belt B-B cross-sectional indicator;

Accompanying drawing 13 is the end view of the injection of insulin syringe needle of this utility model example belt C-C cross-sectional indicator;

Accompanying drawing 14 is the A-A sectional view under state before the use of this utility model embodiment;

Accompanying drawing 15 is the C-C sectional view under state before the use of this utility model embodiment;

Accompanying drawing 16 is for concealing the A-A sectional view after tail-hood under state before the use of this utility model embodiment;

Accompanying drawing 17 is A-A sectional view when this utility model embodiment uses the first stage novopen to be screwed in injection needle;

Accompanying drawing 18 is A-A sectional view during this utility model embodiment use second stage novopen continuation screw-in injection needle;

Accompanying drawing 19 is A-A sectional view during this utility model embodiment use phase III novopen continuation screw-in injection needle;

Accompanying drawing 20 is B-B sectional view during this utility model embodiment use phase III novopen continuation screw-in injection needle;

Accompanying drawing 21 is C-C sectional view during this utility model embodiment use fourth stage novopen continuation screw-in injection needle;

Accompanying drawing 22 is A-A sectional view during this utility model embodiment use fourth stage novopen continuation screw-in injection needle;

Accompanying drawing 23 is B-B sectional view during this utility model embodiment use fourth stage novopen continuation screw-in injection needle;

Accompanying drawing 24 for this utility model embodiment use five-stage extract oversheath time axonometric chart;

Accompanying drawing 25 for this utility model embodiment use five-stage extract oversheath time A-A sectional view;

The A-A sectional view that accompanying drawing 26 uses the 6th stage needle body to start when thrusting human body skin for this utility model embodiment;

Accompanying drawing 27 is A-A sectional view when this utility model embodiment uses the 7th stage needle body to thrust human body skin;

Accompanying drawing 28 for this utility model embodiment use the 8th stage needle body thrust human body skin completely and insulin injection time A-A sectional view;

Accompanying drawing 29 is A-A sectional view when this utility model embodiment uses the complete insulin needle body of the 9th stage injection to extract rear from skin;

Accompanying drawing 30 is B-B sectional view when this utility model embodiment uses the complete insulin needle body of the 9th stage injection to extract rear from skin;

Accompanying drawing 31 is A-A sectional view during this utility model embodiment use the tenth stage novopen back-out injection needle;

Accompanying drawing 32 is the A-A sectional view under state after the use of this utility model embodiment;

Accompanying drawing 33 for this utility model anterior cannula be display " chuck " axonometric chart;

Accompanying drawing 34 for this utility model trigger tube be display " gear platform " axonometric chart;

Accompanying drawing 35 is the B-B sectional view that display " chuck " coordinates with " gear platform ";

Accompanying drawing 36 is the axonometric chart of another embodiment injection of insulin syringe needle of this utility model;

Accompanying drawing 37 is the axonometric chart of needle stand in another embodiment of this utility model;

Accompanying drawing 38 is the A-A sectional view before another embodiment of this utility model uses under state;

Accompanying drawing 39 is the B-B sectional view before another embodiment of this utility model uses under state;

Accompanying drawing 40 is A-A sectional view when extracing oversheath during another embodiment of this utility model uses;

Accompanying drawing 41 is B-B sectional view when extracing oversheath during another embodiment of this utility model uses;

Accompanying drawing 42 is the A-A sectional view after another embodiment of this utility model uses under state;

Accompanying drawing 43 is the B-B sectional view after another embodiment of this utility model uses under state.

In above accompanying drawing:

1. tail-hood; 11. haptic element hooks; 12. inclined-planes; 13. blocks; 14. wedge angle trips; 15. blocks; 16. forelegs; 17. resigning holes;

2. needle stand; 21. chases; 22. protuberances; 23. attic bases; 24. bars; 25. slots to make way;

3. main casing; 31. first trip steps; 32. evade groove; 33. convex tendons; 34. draw-in grooves; 35. second trip steps; 36. anti-back slots; 37. the 3rd trip steps; 38. bayonet sockets; 39. chutes;

4. anterior cannula; 41. elastic latch; 42. is protruding; 43. elasticity empennages; 44. inner faces; 45. inclined planes; 46. chuck;

5. trigger tube; 51. recesses; 52. plugs; 53. gear platforms;

6. needle body;

7. spring;

8. oversheath; 81. fixture blocks; 82. ribs.

Detailed description of the invention

Below in conjunction with drawings and Examples, this utility model is further described:

Embodiment 1: a kind of injection of insulin syringe needle protected with forward tip protection and rear end needle point

As Figure 1-10 shows, this injection needle is shown in Fig. 2 by needle body 6, needle stand 2, main casing 3, oversheath 8, tail-hood 1, anterior cannula 4, trigger tube 5 and spring 7().

Each component structural of the present embodiment injection of insulin syringe needle is described below successively:

1. needle body 6

Described needle body 6 be one for insulin injection bobbin, this needle body 6 has injection portion that forward end direction extends, the linkage section that extends of direction and the canned paragraph between injection portion and linkage section to the back-end.

2. needle stand 2

Described needle stand 2 is shown in Fig. 4 for fixing needle body 6(), the canned paragraph of needle body 6 is fixed on needle stand 2, and the injection portion of needle body 6 is stretched out from needle stand 2 front end, and the linkage section of needle body 6 stretches out from needle stand 2 rear end.Needle stand 2 is made up of attic base 23 and seat bar 24, and seat bar 24 is positioned at attic base 23 front end and is fixedly connected with attic base 23, and seat bar 24 is provided with protuberance 22, and attic base 23 is provided with two slots to make way 25, and attic base 23 outer marginal circumference direction is provided with chase 21.

3. main casing 3

Described main casing 3 is used to hold other parts housing (see figure 5)s except except oversheath 8.Main casing 3 is tube structure, and the parts such as needle stand 2 and needle body 6 are positioned at main casing 3 in the assembled condition.The first trip step 31 is provided with in the middle part of main casing 3 cylinder inboard wall, main casing 3 cylinder inboard wall front end is provided with the second trip step 35, main casing 3 cylinder inboard wall rear portion is provided with the 3rd trip step 37, main casing 3 cylinder inboard wall front portion is provided with anti-back slot 36, main casing 3 cylinder inboard wall front portion is also provided with evades groove 32, main casing 3 inner edge is provided with convex tendon 33 and draw-in groove 34, convex tendon 33 is positioned at the first position location of main casing 3 axis, draw-in groove 34 is positioned at the second position location of main casing 3 axis, if with main casing 3 rear end for benchmark, the distance of the first position location to main casing 3 rear end is less than the distance of the second position location to main casing 3 rear end.Main casing 3 cylinder lateral wall is provided with bayonet socket 38, bayonet socket 38 is axially positioned on the second position location at main casing 3, this bayonet socket 38 is a through hole running through between main casing 3 inside and outside wall, and the chute 39(that bayonet socket 38 place is provided with the extension of forward end direction departs from bayonet socket 38 to be conducive to fixture block 81).The rear end of main casing 3 is for connecting novopen, and its syndeton can adopt thread connecting mode, also can adopt plug connected mode, and plug can also be adopted to rotate snap fit etc.In the present embodiment, what Fig. 5 main casing 3 showed is thread connecting mode.

4. oversheath 8

Described oversheath 8 is for the protection of the overall (see figure 10) of described injection needle.This oversheath 8 is tube-in-tube structure, and under confined state, oversheath 8 is sleeved on outside main casing 3 before use.Oversheath 8 sleeve lining is provided with fixture block 81, and the bayonet socket 38 of fixture block 81 in position on corresponding main casing 3 cylinder lateral wall, is set with fixture block 81 under main casing 3 state at oversheath 8 and snaps in bayonet socket 38 and stretch in main casing 3, oversheath 8 is locked with main casing 3 and is connected.The sleeve lining of oversheath 8 is provided with vertically inwardly outstanding rib 82, when oversheath 8 is sleeved on the outer rear flank of main casing 3, between oversheath 8 inwall and main casing 3 outer wall, leaves the gap deformed for oversheath 8.

5. tail-hood 1

Described tail-hood 1 is for the protection of the linkage section (see figure 3) of needle body 6.Tail-hood 1 is made up of a block 15 and two forelegs 16, block 15 is end cap or ring bodies, the central authorities of block 15 be provided with only intert for needle body 6 linkage section allow pin hole 17, allow pin hole 17 axis and main casing 3 axis being parallel, two forelegs 16 are fixedly connected on block 15 front end, and to allow pin hole 17 axis arrange for reference symmetry, the inner side of each foreleg 16 is provided with inclined-plane 12 on root position, medium position is provided with the block 13 extended internally, terminal position is provided with haptic element hook 11; The outside of each foreleg 16 is provided with wedge angle trip 14 on medium position.

6. anterior cannula 4

Described anterior cannula 4 is for the protection of the injection portion (see Fig. 6 and Fig. 7) using rear needle body 6.The agent structure of anterior cannula 4 is body, and the leading inside of anterior cannula 4 is provided with inner face 44; The rear end of anterior cannula 4 is provided with the elastic latch 41 extended back and the elasticity empennage 43 extended back, and elastic latch 41 and elasticity empennage 43 are staggeredly arranged in anterior cannula 4 circumference; Be provided with outward extending protruding 42 outside the middle part of anterior cannula 4, projection 42 and elastic latch 41 are in anterior cannula 4 circumferential position correspondence, and protruding 42 are provided with inclined plane 45 by elastic latch 41 side.

7. trigger tube 5

Described trigger tube 5 is for the protection of the injection portion (see Fig. 8 and Fig. 9) using front needle body 6.The agent structure of trigger tube 5 is body, and the rear end of trigger tube 5 is provided with two plugs 52 extended back, and plug 52 is provided with barb, is located at recess 51 in trigger tube 5 body.

8. spring 7

Described spring 7 is for pushing anterior cannula 4 and tail-hood 1.

Trigger tube 5, anterior cannula 4, tail-hood 1 and needle stand 2 relationship description that is mobile and that locate in main casing 3 is as follows below:

1. architectural feature

The 3rd location structure formed by concaveconvex structure is provided with between trigger tube 5 body and seat bar 24.Namely between trigger tube 5 body and seat bar 24, side is provided with recess 51, and opposite side is provided with protuberance 22, and recess 51 is stuck on protuberance 22 and forms the 3rd location.Meanwhile, the elastic latch 41 in anterior cannula 4 is stuck on the first trip step 31 on main casing 3, and restriction anterior cannula 4 relatively main casing 3 travels forward.

In a word, this architectural feature solve solve use before and in using trigger tube 5 and anterior cannula 4 protect the integrity problem of needle body 6 injection portion, ensure trigger tube 5 and anterior cannula 4 before use with use in security implementation available protecting to needle body 6 injection portion.

2. annexation feature

The annexation of locating of sliding is designed to by being used for fixing between the needle stand 2 of needle body 6 and main casing 3.Namely on needle stand 2, the outer rim of attic base 23 matches with the inner edge of main casing 3, corresponding attic base 23 outer rim is interval with the first position location and the second position location vertically on main casing 3 inner edge, be installed in the process of described novopen at described injection needle, the axial thrust utilizing novopen head to be produced by tail-hood 1 pair of needle stand 2 forces attic base 23 to move forward to the second position location vertically from the first position location in main casing 3, thus makes to form the annexation of sliding and locating between needle stand 2 and main casing 3.

On the first position location, the outer rim of attic base 23 is coordinated by the first location structure with the inner edge of main casing 3, and on the second position location, the outer rim of attic base 23 is coordinated by the second location structure with the inner edge of main casing 3.Described first location structure is concavo-convex location structure, and this concavo-convex location structure specifically to be coordinated with the convex tendon 33 be located on main casing 3 inner edge by the chase 21 being located at attic base 23 outer marginal circumference direction and formed.Described second location structure is card lock bit architecture, and this card lock bit architecture specifically to be coordinated with draw-in groove 34 set on main casing 3 inner edge by attic base 23 outer rim and side end face, front and back and formed.

In a word, this annexation feature object stops after novopen head will being utilized to force the attic base 23 on needle stand 2 to move forward to the second position location from the first position location by the axial thrust of tail-hood to needle stand 2 when installing injection needle, thus the information whether be in place by injection needle associates with the shift position of attic base 23 in main casing 3 on needle stand 2.Utilize the movement of tail-hood 1 to thread off to trigger anterior cannula 4 simultaneously.

3. position relationship feature

Correspondence position relation is set up in 3rd position location and the first position location.When trigger tube 5 relative bars 24 are in the 3rd position location, the attic base 23 on needle stand 2 relatively main casing 3 is on the first position location; When attic base 23 moves forward to the second position location vertically from the first position location in main casing 3, the 3rd location removed by trigger tube 5 and seat bar 24, and formation is slidably connected.

In a word, whether the information whether injection needle is in place by this position relationship feature is unlocked after being located with trigger tube and anterior cannula by the shift position of attic base in main casing associates, whether unlock the state connection property whether being ready to novopen and injection needle inject behind trigger tube and anterior cannula location the most at last, thus substantially increase safety and the convenience of injection needle use.

The present embodiment injection of insulin syringe needle before use under confined state the annexation of each parts and position relationship be described below:

As illustrated in figures 14-16, before use under confined state, oversheath 8 is sleeved on outside main casing 3, and the fixture block 81 on oversheath 8 snaps in the bayonet socket 38 of main casing 3 and stretches in main casing 3, oversheath 8 is locked with main casing 3 and is connected; Needle stand 2 and needle body 6 are positioned at main casing 3, attic base 23 on needle stand 2 is in the first position location in main casing 3, and on the first position location, the chase 21 in attic base 23 outer marginal circumference direction coordinates with the convex tendon 33 on main casing 3 inner edge and forms concavo-convex location structure (see Figure 15); Tail-hood 1 is positioned at main casing 3 rear end, block 15 on tail-hood 1 is positioned at the linkage section (see Figure 14 and Figure 15) of attic base 23 rear for the protection of needle body 6, and two forelegs 16 on tail-hood 1 stretch to front (see Figure 14 and Figure 15) through two slots to make way 25 on attic base 23; Described anterior cannula 4 is positioned at main casing 3, elastic latch 41 in anterior cannula 4 is stuck on the first trip step 31 on main casing 3, restriction anterior cannula 4 relatively main casing 3 travels forward (see Figure 16), and the haptic element hook 11 simultaneously on tail-hood 1 two forelegs 16 hooks in the elastic latch 41 of anterior cannula 4 (see Figure 14); Described trigger tube 5 is positioned at main casing 3 front end and extends to outside front end, for the protection of the injection portion (see Figure 14) of needle body 6, the rear sleeve of trigger tube 5 is contained on the seat bar 24 of needle stand 2, the rear portion of trigger tube 5 is positioned at anterior cannula 4, the front end of trigger tube 5 close to or lean on the inner front end face of oversheath 8, the protuberance 22 that the recess 51 on trigger tube 5 is stuck in a bar 24 forms location (see Figure 15 and Figure 16); Described spring 7 one end is resisted against on the block 13 of tail-hood 1 two forelegs 16, and the other end is resisted against (see Figure 14) on the inner face 44 of anterior cannula 4.

The use procedure of the present embodiment injection of insulin syringe needle is described below:

First stage:

Figure 17 represents the state of first stage.As can be seen from Figure 17, in this case, novopen head is screwed in injection needle described in the present embodiment by user.The head of novopen promotes tail-hood 1 and moves forward, and the arrow in Figure 17 represents the thrust that novopen head produces, and the haptic element hook 11 of tail-hood 1 is by inclined plane 45 jack-up in anterior cannula 4 projection 42 simultaneously.

Second stage:

Figure 18 represents the state of second stage.As can be seen from Figure 18, in this case, novopen continues to screw in injection needle, and anterior cannula 4 projection 42 crossed by the haptic element hook 11 of tail-hood 1, and the elastic latch 41 that the inclined-plane 12 of tail-hood 1 is oppressed in anterior cannula 4 simultaneously curves inwardly.

Phase III:

Figure 19 and Figure 20 represents the state of phase III.In this case, novopen continues to screw in injection needle, elastic latch 41 continues to curve inwardly, finally force elastic latch 41 and the first trip step 31 to break off relations and fall into and evade groove 32, relieve anterior cannula 4 proal spacing in main casing 3, now under the promotion of spring 7, anterior cannula 4 moves forward, until protruding 42 are tackled by haptic element hook 11 and stop moving and travelling forward to anterior cannula 4 carrying out spacing (see Figure 19).As can be seen from Figure 20, in this case, the fixture block 81 on oversheath 8 snaps in the bayonet socket 38 of main casing 3 and stretches in main casing 3, and the attic base 23 on needle stand 2 is still in the first position location, and tail-hood 1 contacts the attic base 23 on needle stand 2 gradually.

Fourth stage:

Figure 21, Figure 22 and Figure 23 represent the state of fourth stage.In this case, novopen continues to screw in injection needle, block 15 on tail-hood 1 against needle stand 2 attic base 23 and promote attic base 23 and move forward to the second position location (see Figure 21) from the first position location, coordinate in the draw-in groove 34 that attic base 23 outer rim and side end face, front and back snap on main casing 3 inner edge on the second position location and form card lock bit architecture, attic base 23 is locked on the second position location, can not continue forward mobile, can not move backward.In this case, because trigger tube 5 front end leans on the inner front end face of oversheath 8, when needle stand 2 moves forward, the protuberance 22 on needle stand 2 and the location between the recess 51 on trigger tube 5 are unlocked (see Figure 22).In this case, the fixture block 81 on attic base 23 outer rim jack-up oversheath 8, makes fixture block 81 and bayonet socket 38 thread off, and causes oversheath 8 and main casing 3 to unlock, and allows to extract oversheath 8(in this case and sees Figure 23).

Five-stage:

Figure 25 and Figure 26 represents the state of five-stage.In this case, oversheath 8 is extractd with hands.

6th stage:

Figure 26 represents the state in the 6th stage.In this case, by trigger tube 5 and contact human skin, needle body 6 starts to thrust human body skin.As front end and the contact human skin of trigger tube 5, trigger tube 5 moves backward, and the block 13 on the plug 52 jack-up tail-hood 1 now on trigger tube 5, forces the haptic element hook 11 of tail-hood 1 to be gradually separated with the projection 42 of anterior cannula 4.

7th stage:

Figure 27 represents the state in the 7th stage.In this case, trigger tube 5 continues to move backward, until haptic element hook 11 be separated completely with protruding 42 after under the promotion of spring 7 anterior cannula 4 move forward, and stretch out main casing 3 front end, the front end face of anterior cannula 4 is hampered by human body skin, concordant with trigger tube 5 front end face and together with move.

8th stage:

Figure 28 represents the state in the 8th stage.In this case, needle body 6 starts insulin injection after entering human body skin completely.

9th stage:

Figure 29 and Figure 30 represents the state in the 9th stage.In this case; described injection needle is extracted from human body skin; now anterior cannula 4 is released main casing 3 front end by spring 7; until the projection 42 in anterior cannula 4 is tackled by the second trip step 35 on main casing 3 and stops stretching out forward, now anterior cannula 4 is used for protecting the injection portion (see Figure 29) of needle body 6.In this case, the elasticity empennage 43 of anterior cannula 4 snaps in the anti-back slot 36 of main casing 3 after stretching and forms the spacing of anterior cannula 4 movement backward, prevents anterior cannula 4 rollback (see Figure 30).

Tenth stage:

Figure 31 represents the state in the tenth stage.In this case, novopen is screwed out injection needle, tail-hood 1 moves backward under spring 7 promotes, and two blocks 13 simultaneously on tail-hood 1 clamp the plug 52 on trigger tube 5, and drive trigger tube 5 to move backward.

Use rear state:

Figure 32 represents the rear state of use.In this case, along with novopen constantly screws out, trigger tube 5 continues to move backward until seat bar 24 front end on needle stand 2 is low stops by trigger tube 5 inner front end face.Then; it is spacing that the 3rd trip step 37 that wedge angle trip 14 on tail-hood 1 falls into main casing 3 forms that tail-hood 1 moves forward; and the barb of trigger tube 5 plug 52 coordinates with two blocks 13; be used for limiting tail-hood 1 to move backward in main casing 3 rear end; now tail-hood 1 is used for protecting the linkage section of needle body 6, prevents described injection needle from being used by secondary simultaneously.

As can be seen from above embodiment, the cooperation in this utility model injection of insulin syringe needle between each component structural and the relation of its practical function as follows:

1., before use under state, there is following relationship:

(1) fixture block 81 of oversheath 8 coordinates with the bayonet socket 38 of main casing 3, for realizing the locking of oversheath 8 and main casing 3;

(2) chase 21 of needle stand 2 coordinates with the convex tendon 33 of main casing 3, for realizing the location (first locates) of needle stand 2 and main casing 3;

(3) protuberance 22 of needle stand 2 coordinates with the recess 51 of trigger tube 5, for realizing the location of trigger tube 5 and needle stand 2;

(4) elastic latch 41 of anterior cannula 4 coordinates with the first trip step 31 of main casing 3, proal spacing in main casing 3 for realizing anterior cannula 4;

(5) elastic latch 41 of anterior cannula 4 coordinates with the haptic element hook 11 of tail-hood 1, for realize tail-hood 1 relatively anterior cannula 4 move backward spacing;

(6) coordinating between the block 13 of spring 7, tail-hood 1 and the inner face 44 of anterior cannula 4, wherein, spring 7 one end is resisted against on the block 13 of tail-hood 1, and the other end is resisted against the inner face 44 of anterior cannula 4, for realizing tail-hood 1, connection between anterior cannula 4 and spring 7 and location.

2., in use under state, there is following relationship:

(1) inclined-plane 12 of tail-hood 1 coordinates with the elastic latch 41 of anterior cannula 4, proal spacing in main casing 3 for removing anterior cannula 4.Specifically: in use, along with tail-hood 1 moves forward, inclined-plane 12 is oppressed elastic latch 41 and is curved inwardly, and finally forces elastic latch 41 and the first trip step 31 to break off relations, and removes anterior cannula 4 proal spacing in main casing 3;

(2) the haptic element hook 11 of tail-hood 1 coordinates with the projection 42 of anterior cannula 4, for realize to anterior cannula 4 travel forward carry out spacing.Specifically: in use, along with novopen constantly screws in injection needle, tail-hood 1 moves forward, haptic element hook 11 is by protruding 42 inclined-plane jack-up, cross protruding 42 afterwards, and after elastic latch 41 and the first trip step 31 break off relations, haptic element hook 11 catches on protruding 42 pairs of anterior cannula 4 and travels forward and carry out spacing (protruding 42 are tackled by haptic element hook 11 in travelling forward);

(3) attic base 23 of needle stand 2 coordinates with the draw-in groove 34 of main casing 3, for realizing the location (second locates) of needle stand 2 and main casing 3;

(4) elastic latch 41 of anterior cannula 4 coordinates with the groove 32 of evading of main casing 3, for avoiding the interference of elastic latch 41 pairs of springs 7.Specifically: in use, elastic latch 41 fall into after crossing the first trip step 31 of main casing 3 evade groove 32 be in order to avoid elastic latch 41 pairs of springs 7 interference (avoid elastic latch 41 encounter spring 7 formed interfere);

(5) block 15 of tail-hood 1 coordinates with the attic base 23 of needle stand 2, for realizing running fix.Specifically: in use, along with tail-hood 1 moves forward, block 15 gradually contact attic base 23, and promote attic base 23 shake off above-mentioned first location, continue to move forward, until can not move again after falling into the second location;

(6) attic base 23 of needle stand 2, coordinating between the fixture block 81 of oversheath 8 and the bayonet socket 38 of main casing 3, be used for whether allowing excision oversheath 8 and novopen and injection needle whether to get out the state relation injected.Specifically: in use, when the attic base 23 on needle stand 2 falls into the draw-in groove 34 on main casing 3, first, show that injection needle is formally installed to novopen head; Secondly, fixture block 81 on the outer rim jack-up oversheath 8 of attic base 23, makes oversheath 8 deform, and finally causes the fixture block 81 on oversheath 8 to be threaded off with the bayonet socket 38 on main casing 3, thus realize oversheath 8 and the unblock of main casing 3, now can extract oversheath 8; 3rd, because trigger tube 5 front end is resisted against on the inner face of oversheath 8, when needle stand 2 moves forward, the protuberance 22 on needle stand 2 and the location between the recess 51 on trigger tube 5 are unlocked, and show that trigger tube 5 has entered the state that can trigger;

(7) plug 52 of trigger tube 5 coordinates with the block 13 of tail-hood 1, spacing for what remove that anterior cannula 4 moves forward.Specifically: as front end and the contact human skin of trigger tube 5, trigger tube 5 moves backward, block 13 on plug 52 jack-up tail-hood 1 now on trigger tube 5, the haptic element hook 11 of tail-hood 1 is forced gradually to be separated with the projection 42 of anterior cannula 4, until be completely separated after under the effect of spring 7 anterior cannula 4 move forward, and stretch out main casing 3 front end, the front end face of anterior cannula 4 is hampered by human body skin, concordant with trigger tube 5 front end face and together with move, until pin starts insulin injection after entering human body skin completely.

3., after a procedure under state, there is following relationship:

(1) projection 42 of anterior cannula 4 coordinates with the second trip step 35 of main casing 3, for realizing anterior cannula 4 from main casing 3 outwardly directed spacing (preventing anterior cannula 4 from skidding off from main casing 3);

(2) the elasticity empennage 43 of anterior cannula 4 coordinates with the anti-back slot 36 of main casing 3, for realizing spacing (prevent anterior cannula 4 from main casing 3 rollback) of anterior cannula 4 from the inside rollback of main casing 3;

(3) tail-hood 1 wedge angle trip 14 coordinates with the 3rd trip step 37 of main casing 3, is used for stoping tail-hood 1 to move forward under external force in main casing 3, prevents syringe needle secondary from using.

Embodiment 2: a kind of injection of insulin syringe needle with forward tip protection

As shown in figure 36, this injection needle is by needle body 6, needle stand 2, main casing 3, oversheath 8, anterior cannula 4, trigger tube 5 and spring 7.

After understanding of embodiment 1 injection of insulin syringe needle completely, embodiment 2 compared with embodiment 1 only with being with forward tip operator guards, without rear end needle point operator guards.Specifically, in structural design, there is following difference:

The first, embodiment 2 eliminates the tail-hood 1 in embodiment 1;

The second, two forelegs 16 in embodiment 1 tail-hood 1 are transplanted on embodiment 1 needle stand 2 by embodiment 2, see shown in Figure 37.Embodiment 2 remains block 13 set on foreleg 16 and haptic element hook 11.Embodiment 2 eliminates wedge angle trip 14 set on foreleg 16.

3rd, the wedge angle trip 14 of embodiment 2 set by eliminating on foreleg 16, so correspondence eliminates main casing 3 cylinder inboard wall rear portion be provided with the 3rd trip step 37.

4th, embodiment 2 changes because the position of foreleg 16 under confined state before use there occurs compared with embodiment 1 (more forward than origin-location to, crossed the projection 42 of anterior cannula 4), so correspondence eliminates the inclined plane 45 of protruding 42 sides.

Described in embodiment 2, all the other structures of injection of insulin syringe needle are identical with embodiment 1, no longer carry out repeated description here to save space, and those skilled in the art should be easily understood that embodiment 2 after understanding embodiment 1 completely.

The use procedure of embodiment 2 injection of insulin syringe needle is summarized as follows:

As shown in figures 38 and 39, before use under confined state, oversheath 8 is sleeved on outside main casing 3, and the fixture block 81 on oversheath 8 snaps in the bayonet socket 38 of main casing 3 and stretches in main casing 3, oversheath 8 is locked with main casing 3 and is connected; Needle stand 2 and needle body 6 are positioned at main casing 3, attic base 23 on needle stand 2 is in the first position location in main casing 3, on the first position location, the chase 21 in attic base 23 outer marginal circumference direction coordinates with the convex tendon 33 on main casing 3 inner edge and forms concavo-convex location structure, and two forelegs 16 that attic base 23 extends forward stretch to front; Described anterior cannula 4 is positioned at main casing 3, and the elastic latch 41 in anterior cannula 4 is stuck on the first trip step 31 on main casing 3, and restriction anterior cannula 4 relatively main casing 3 travels forward; Described trigger tube 5 is positioned at main casing 3 front end and extends to outside front end, for the protection of the injection portion of needle body 6, trigger tube 5 relatively main casing 3 is provided with move forward spacing, the rear sleeve of trigger tube 5 is contained on the seat bar 24 of needle stand 2, the rear portion of trigger tube 5 is positioned at anterior cannula 4, trigger tube 5 is on the 3rd position location, the front end of trigger tube 5 is close or lean on the inner front end face of oversheath 8, the protuberance 22 that recess 51 on trigger tube 5 is stuck in a bar 24 forms location, now, the attic base 23 on needle stand 2 relatively main casing 3 is on the first position location; Described spring 7 one end is resisted against on the block 13 of needle stand 2 two forelegs 16, and the other end is resisted against on the inner face 44 of anterior cannula 4.

As shown in Figure 40 and 41, in use, when novopen head is screwed in injection needle described in the present embodiment by user, the head of novopen promotes attic base 23 and moves forward, inclined-plane 12 inside foreleg 16 is oppressed elastic latch 41 and is curved inwardly, finally force elastic latch 41 and the first trip step 31 to break off relations and fall into and evade groove 32, remove anterior cannula 4 proal spacing in main casing 3, now under the promotion of spring 7, anterior cannula 4 moves forward, until protruding 42 tackled by haptic element hook 11 and stop mobile and to anterior cannula 4 travel forward carry out spacing; Meanwhile, attic base 23 moves forward to the second position location from the first position location, coordinate in the draw-in groove 34 that attic base 23 outer rim and side end face, front and back snap on main casing 3 inner edge on the second position location and form card lock bit architecture, attic base 23 is locked on the second position location, can not continue forward mobile, can not move backward.In this case, because trigger tube 5 front end leans on the inner front end face of oversheath 8, when needle stand 2 moves forward, the protuberance 22 on needle stand 2 and the 3rd between the recess 51 on trigger tube 5 are located and are unlocked, and now trigger tube 5 and seat bar 24 are formed and be slidably connected.Meanwhile, in this case, the fixture block 81 on attic base 23 outer rim jack-up oversheath 8, makes fixture block 81 and bayonet socket 38 thread off, and causes oversheath 8 and main casing 3 to unlock, extracts oversheath 8 in this case.Then, by trigger tube 5 and contact human skin, needle body 6 starts to thrust human body skin, trigger tube 5 moves backward, block 13 on plug 52 jack-up foreleg 16 now on trigger tube 5, the haptic element hook 11 of foreleg 16 is forced gradually to be separated with the projection 42 of anterior cannula 4, until be completely separated after under the promotion of spring 7 anterior cannula 4 move forward, and stretch out main casing 3 front end, the front end face of anterior cannula 4 is hampered by human body skin, concordant with trigger tube 5 front end face and together with move, until pin starts insulin injection after entering human body skin completely.

As shown in Figure 42 and 43, when extracting described injection needle from human body skin after a procedure, anterior cannula 4 is released main casing 3 front end by spring 7, until the projection 42 in anterior cannula 4 is tackled by the second trip step 35 on main casing 3 and stops stretching out forward, now anterior cannula 4 is used for protecting the injection portion of needle body 6; Simultaneously the elasticity empennage 43 of anterior cannula 4 snaps in the anti-back slot 36 of main casing 3 after stretching and forms the spacing of anterior cannula 4 movement backward, prevents anterior cannula 4 rollback, finally removes described injection needle from described novopen head.

Related content in above embodiment and change are described as follows:

1. more than in two embodiments, what described first location structure adopted is concavo-convex location structure, elastic positioning structure or friction location structure can be adopted with the exception of this to replace, and also can obtain same or analogous technique effect, this is that those skilled in the art are intelligible.First location structure should adopt the location structure of non-locked character theoretically, because attic base 23 outer rim and main casing 3 inner edge are in the first position location before use, and needs to slide axially between attic base 23 outer rim and main casing 3 inner edge in using.

Described elastic positioning structure is coordinated by elasticity pearl pin is formed with depression, elasticity pearl pin with cave in both in, one is located in attic base 23 outer rim, and another one is located on main casing 3 inner edge.

Described friction location structure is formed by attic base 23 outer rim and main casing 3 inner edge frictional fit.

2. more than in two embodiments, the card lock bit architecture that described second location structure adopts, elastic positioning structure, friction location structure or end face can be adopted with the exception of this to replace against location structure, also can obtain same or analogous technique effect, this is that those skilled in the art are intelligible.Second location structure can adopt the location structure of non-locked character theoretically, also can adopt the location structure of locked character.Elastic positioning structure, friction location structure or end face should belong to the location structure of non-locked character against location structure, and in above embodiment, coordinate the card lock bit architecture formed should belong to the location structure of locked character by attic base 23 outer rim and side end face, front and back with draw-in groove 34 set on main casing 3 inner edge.But in this card lock bit architecture, just there is gap when the width of draw-in groove 34 is greater than attic base 23 thickness, when this gap, large attic base 23 to a certain extent just can slidably reciprocate in draw-in groove 34, thus changes into the location structure of non-locked character.

Described end face is formed against coordinating against the anterior end surface of location structure by attic base 23 outer rim with the inner face of main casing 3 inner edge.

3., more than in two embodiments, described bayonet socket 38 is axially positioned on the second position location, as long as in fact the position of bayonet socket 38 all can obtain same or analogous technique effect on the second position location or near the second position location at main casing 3.Refer near described with the second position location as 1 or more rearward on the front, basic point.Position relationship such in this utility model sets to meet particular kind of relationship, this particular kind of relationship is: when attic base 23 moves to the second position location from the first position location, fixture block 81 on attic base 23 outer rim jack-up oversheath 8, oversheath 8 is deformed, fixture block 81 and bayonet socket 38 is finally caused to be threaded off, thus realize oversheath 8 and unlock with main casing 3, the most whether allow to extract the state relation whether oversheath 8 and novopen and injection needle are ready to inject.

4. more than in two embodiments, described trigger tube 5 relatively main casing 3 be provided with the spacing front end by trigger tube 5 that moves forward close to or lean and formed on the inner front end face of oversheath 8.Spacingly other versions can also be adopted in order to what realize moving forward trigger tube 5, such as see shown in accompanying drawing 33-Figure 35, the gear platform 53 of trigger tube 5 lean the chuck 46 on the inner front end face 44 of anterior cannula 4 formed trigger tube 5 relatively main casing 3 be provided with move forward spacing.

5. more than, two embodiments are in order to the example that technical solutions of the utility model provide is described, from the introduction of this utility model background technology and the technical issues that need to address and goal of the invention, relate generally to needle stand 2, main casing 3, oversheath 8, trigger tube 5, anterior cannula 4, spring 7 and the structure between them thereof and annexation, and it is irrelevant whether to there is latch-up structure between oversheath 8 and main casing 3.In other words; latch-up structure between oversheath 8 and main casing 3 belongs to inessential structure for this utility model; can allow them that some changes occur, such as, whether be provided with latch-up structure between oversheath 8 and main casing 3 and be all included within this utility model protection domain.For another example, whether be provided with rear end needle point operator guards to be all included within this utility model protection domain.

Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences done according to this utility model spirit change or modify, and all should be encompassed within protection domain of the present utility model.

Claims (8)

1. the injection of insulin syringe needle with needle point protection, comprising:

Needle body (6), this needle body (6) has the injection portion of a forward end direction extension, the linkage section of a direction extension to the back-end and a canned paragraph between injection portion and linkage section;

Needle stand (2), this needle stand (2) is for fixing needle body (6), and the canned paragraph of described needle body (6) is fixed on needle stand (2), and the injection portion of needle body (6) is stretched out from needle stand (2) front end, and the linkage section of needle body (6) stretches out from needle stand (2) rear end;

Main casing (3), this main casing (3) is tube structure, and needle stand (2) and needle body (6) are positioned at main casing (3) in the assembled condition, and the rear end of main casing (3) is for connecting novopen;

It is characterized in that:

Described needle stand (2) is made up of attic base (23) and seat bar (24), and seat bar (24) is positioned at attic base (23) front end and is fixedly connected with attic base (23), attic base (23) is provided with two slots to make way (25), the outer rim of attic base (23) matches with the inner edge of main casing (3), corresponding attic base (23) outer rim is interval with the first position location and the second position location vertically on main casing (3) inner edge, be installed in the process of described novopen at described injection needle, novopen head is utilized to force attic base (23) to move forward to the second position location vertically from the first position location in main casing (3) to the axial thrust that needle stand (2) produces, thus make to form the annexation of sliding and locating between needle stand (2) and main casing (3), on the first position location, the outer rim of attic base (23) is coordinated by the first location structure with the inner edge of main casing (3), and on the second position location, the outer rim of attic base (23) is coordinated by the second location structure with the inner edge of main casing (3), described first location structure adopts concavo-convex location structure, elastic positioning structure or friction location structure, described second location structure adopts concavo-convex location structure, elastic positioning structure, friction location structure, card lock bit architecture or end face against location structure,

The first trip step (31) is provided with in the middle part of described main casing (3) cylinder inboard wall, main casing (3) cylinder inboard wall front end is provided with the second trip step (35), main casing (3) cylinder inboard wall rear portion is provided with the 3rd trip step (37), and main casing (3) cylinder inboard wall front portion is provided with anti-back slot (36);

Tail-hood (1), anterior cannula (4), trigger tube (5) and spring (7) is provided with in described main casing (3);

Described tail-hood (1) is made up of a block (15) and two forelegs (16), block (15) is end cap or ring bodies, the central authorities of block (15) be provided with only supply needle body (6) linkage section to intert allow pin hole (17), allow pin hole (17) axis and main casing (3) axis being parallel, two forelegs (16) are fixedly connected on block (15) front end, and be that reference symmetry is arranged to allow pin hole (17) axis, the inner side of each foreleg (16) is provided with inclined-plane (12) on root position, medium position is provided with the block (13) extended internally, terminal position is provided with haptic element hook (11), the outside of each foreleg (16) is provided with wedge angle trip (14) on medium position,

The agent structure of described anterior cannula (4) is body, and the leading inside of anterior cannula (4) is provided with inner face (44); The rear end of anterior cannula (4) is provided with the elastic latch (41) extended back and the elasticity empennage (43) extended back, and elastic latch (41) and elasticity empennage (43) are staggeredly arranged in anterior cannula (4) circumference; Be provided with outward extending projection (42) outside the middle part of anterior cannula (4), protruding (42) and elastic latch (41) are corresponding at anterior cannula (4) circumferential position, and protruding (42) are provided with inclined plane (45) by elastic latch (41) side;

The agent structure of described trigger tube (5) is body, the rear end of trigger tube (5) is provided with two plugs (52) extended back, plug (52) is provided with barb, between trigger tube (5) body and seat bar (24), side is provided with recess (51), opposite side is provided with protuberance (22), and recess (51) is stuck in the upper formation the 3rd of protuberance (22) and locates;

Before use under confined state, described attic base (23) is in the first position location in main casing (3), tail-hood (1) is positioned at main casing (3) rear end, block (15) on tail-hood (1) is positioned at the linkage section of attic base (23) rear for the protection of needle body (6), and two forelegs (16) on tail-hood (1) stretch to front through two slots to make way (25) on attic base (23); Described anterior cannula (4) is positioned at main casing (3), elastic latch (41) in anterior cannula (4) is stuck on the first trip step (31) on main casing (3), restriction anterior cannula (4) relatively main casing (3) travels forward, and the haptic element hook (11) simultaneously on tail-hood (1) two foreleg (16) hooks in the elastic latch (41) of anterior cannula (4); Described trigger tube (5) is positioned at main casing (3) front end and extends to outside front end, for the protection of the injection portion of needle body (6), trigger tube (5) relatively main casing (3) is provided with move forward spacing, the rear sleeve of trigger tube (5) is contained on the seat bar (24) of needle stand (2), the rear portion of trigger tube (5) is positioned at anterior cannula (4), trigger tube (5) is on the 3rd position location, and now, the attic base (23) on needle stand (2) relatively main casing (3) is on the first position location; Described spring (7) one end is resisted against on the block (13) of tail-hood (1) two foreleg (16), and the other end is resisted against on the inner face (44) of anterior cannula (4);

In use, when described injection needle is installed to described novopen, the head of novopen promotes tail-hood (1) and moves forward, the haptic element hook (11) of tail-hood (1) is by inclined plane (45) jack-up in anterior cannula (4) protruding (42), cross projection (42) afterwards, the inclined-plane (12) compressing elastic latch (41) of tail-hood (1) curves inwardly simultaneously, elastic latch (41) and the first trip step (31) is finally forced to break off relations, remove anterior cannula (4) proal spacing in main casing (3), now under the promotion of spring (7), anterior cannula (4) moves forward, until protruding (42) stopped by haptic element hook (11) interception mobile and to anterior cannula (4) travel forward carry out spacing, then, block (15) on tail-hood (1) against needle stand (2) attic base (23) and promote attic base (23) and move forward to the second position location from the first position location, now because trigger tube (5) is subject to moving forward spacing restriction, when needle stand (2) moves forward, trigger tube (5) and seat bar (24) are removed the 3rd and are located, and formation is slidably connected, then, as front end and the contact human skin of trigger tube (5), trigger tube (5) moves backward, block (13) on plug (52) jack-up tail-hood (1) now on trigger tube (5), the haptic element hook (11) of tail-hood (1) is forced gradually to be separated with the projection (42) of anterior cannula (4), until be completely separated after under the promotion of spring (7) anterior cannula (4) move forward, and stretch out main casing (3) front end, the front end face of anterior cannula (4) is hampered by human body skin, concordant with trigger tube (5) front end face and together with move, until pin starts insulin injection after entering human body skin completely,

When extracting described injection needle from human body skin after a procedure, anterior cannula (4) is released main casing (3) front end by spring (7), until projection (42) in anterior cannula (4) is stopped stretching out forward by the second trip step (35) interception on main casing (3), now anterior cannula (4) is used for protecting the injection portion of needle body (6); Simultaneously the elasticity empennage (43) of anterior cannula (4) snaps in the anti-back slot (36) of main casing (3) after stretching and forms the spacing of anterior cannula (4) movement backward, prevents anterior cannula (4) rollback;

When removing described injection needle from described novopen head after a procedure, tail-hood (1) moves backward under spring (7) promotes, two blocks (13) simultaneously on tail-hood (1) clamp the plug (52) on trigger tube (5), and drive trigger tube (5) to move backward, stop until seat bar (24) front end on needle stand (2) is low by trigger tube (5) inner front end face; Then; wedge angle trip (14) on tail-hood (1) fall into main casing (3) the 3rd trip step (37) formed tail-hood (1) move forward spacing; and the barb of trigger tube (5) plug (52) coordinates with two blocks (13); be used for limiting tail-hood (1) to move backward in main casing (3) rear end; now tail-hood (1) be used for protect needle body (6) linkage section, prevent described injection needle from being used by secondary simultaneously.

2. the injection of insulin syringe needle with needle point protection, comprising:

Needle body (6), this needle body (6) has the injection portion of a forward end direction extension, the linkage section of a direction extension to the back-end and a canned paragraph between injection portion and linkage section;

Needle stand (2), this needle stand (2) is for fixing needle body (6), and the canned paragraph of described needle body (6) is fixed on needle stand (2), and the injection portion of needle body (6) is stretched out from needle stand (2) front end, and the linkage section of needle body (6) stretches out from needle stand (2) rear end;

Main casing (3), this main casing (3) is tube structure, and needle stand (2) and needle body (6) are positioned at main casing (3) in the assembled condition, and the rear end of main casing (3) is for connecting novopen;

It is characterized in that:

Described needle stand (2) is made up of attic base (23), seat bar (24) and two forelegs (16), seat bar (24) is positioned at attic base (23) front end and is fixedly connected with attic base (23), two present bar (24) lateral symmetry of foreleg (16) are arranged, the root of two forelegs (16) is fixedly connected with attic base (23) respectively, the inner side of each foreleg (16) is provided with inclined-plane (12) on root position, medium position is provided with the block (13) extended internally, terminal position is provided with haptic element hook (11); The outer rim of attic base (23) matches with the inner edge of main casing (3), corresponding attic base (23) outer rim is interval with the first position location and the second position location vertically on main casing (3) inner edge, be installed in the process of described novopen at described injection needle, utilize novopen head to force attic base (23) to move forward to the second position location vertically from the first position location in main casing (3) to the axial thrust that needle stand (2) produces, thus make to form the annexation of sliding and locating between needle stand (2) and main casing (3); On the first position location, the outer rim of attic base (23) is coordinated by the first location structure with the inner edge of main casing (3), and on the second position location, the outer rim of attic base (23) is coordinated by the second location structure with the inner edge of main casing (3); Described first location structure adopts concavo-convex location structure, elastic positioning structure or friction location structure; Described second location structure adopts concavo-convex location structure, elastic positioning structure, friction location structure, card lock bit architecture or end face against location structure;

Be provided with the first trip step (31) in the middle part of described main casing (3) cylinder inboard wall, main casing (3) cylinder inboard wall front end is provided with the second trip step (35), and main casing (3) cylinder inboard wall front portion is provided with anti-back slot (36);

Anterior cannula (4), trigger tube (5) and spring (7) is provided with in described main casing (3);

The agent structure of described anterior cannula (4) is body, and the leading inside of anterior cannula (4) is provided with inner face (44); The rear end of anterior cannula (4) is provided with the elastic latch (41) extended back and the elasticity empennage (43) extended back, and elastic latch (41) and elasticity empennage (43) are staggeredly arranged in anterior cannula (4) circumference; Be provided with outward extending projection (42) outside the middle part of anterior cannula (4), protruding (42) and elastic latch (41) are corresponding at anterior cannula (4) circumferential position;

The agent structure of described trigger tube (5) is body, the rear end of trigger tube (5) is provided with two plugs (52) extended back, plug (52) is provided with barb, between trigger tube (5) body and seat bar (24), side is provided with recess (51), opposite side is provided with protuberance (22), and recess (51) is stuck in the upper formation the 3rd of protuberance (22) and locates;

Before use under confined state, described attic base (23) is in the first position location in main casing (3), and two forelegs (16) that attic base (23) extends forward stretch to front; Described anterior cannula (4) is positioned at main casing (3), and the elastic latch (41) in anterior cannula (4) is stuck on the first trip step (31) on main casing (3), and restriction anterior cannula (4) relatively main casing (3) travels forward; Described trigger tube (5) is positioned at main casing (3) front end and extends to outside front end, for the protection of the injection portion of needle body (6), trigger tube (5) relatively main casing (3) is provided with move forward spacing, the rear sleeve of trigger tube (5) is contained on the seat bar (24) of needle stand (2), the rear portion of trigger tube (5) is positioned at anterior cannula (4), trigger tube (5) is on the 3rd position location, and now, the attic base (23) on needle stand (2) relatively main casing (3) is on the first position location; Described spring (7) one end is resisted against on the block (13) of needle stand (1) two foreleg (16), and the other end is resisted against on the inner face (44) of anterior cannula (4);

In use, when described injection needle is installed to described novopen, the head of novopen promotes attic base (23) and moves forward, the inclined-plane (12) compressing elastic latch (41) of foreleg (16) inner side curves inwardly, elastic latch (41) and the first trip step (31) is finally forced to break off relations, remove anterior cannula (4) proal spacing in main casing (3), now under the promotion of spring (7), anterior cannula (4) moves forward, until protruding (42) stopped by haptic element hook (11) interception mobile and to anterior cannula (4) travel forward carry out spacing, meanwhile, attic base (23) moves forward to the second position location from the first position location, now because trigger tube (5) is subject to moving forward spacing restriction, when needle stand (2) moves forward, trigger tube (5) and seat bar (24) are removed the 3rd and are located, and formation is slidably connected, then, as front end and the contact human skin of trigger tube (5), trigger tube (5) moves backward, block (13) on plug (52) jack-up foreleg (16) now on trigger tube (5), the haptic element hook (11) of foreleg (16) is forced gradually to be separated with the projection (42) of anterior cannula (4), until be completely separated after under the promotion of spring (7) anterior cannula (4) move forward, and stretch out main casing (3) front end, the front end face of anterior cannula (4) is hampered by human body skin, concordant with trigger tube (5) front end face and together with move, until pin starts insulin injection after entering human body skin completely,

When extracting described injection needle from human body skin after a procedure, anterior cannula (4) is released main casing (3) front end by spring (7), until projection (42) in anterior cannula (4) is stopped stretching out forward by the second trip step (35) interception on main casing (3), now anterior cannula (4) is used for protecting the injection portion of needle body (6); Simultaneously the elasticity empennage (43) of anterior cannula (4) snaps in the anti-back slot (36) of main casing (3) after stretching and forms the spacing of anterior cannula (4) movement backward, prevents anterior cannula (4) rollback, finally removes described injection needle from described novopen head.

3. injection needle according to claim 1 and 2, is characterized in that: described concavo-convex location structure to be coordinated with the convex tendon (33) be located on main casing (3) inner edge by the chase (21) being located at attic base (23) outer marginal circumference direction and formed.

4. injection needle according to claim 1 and 2, it is characterized in that: described elastic positioning structure is coordinated by elasticity pearl pin formed with depression, elasticity pearl pin is with in both depressions, and one is located in attic base (23) outer rim, and another one is located on main casing (3) inner edge.

5. injection needle according to claim 1 and 2, is characterized in that: described friction location structure is formed by attic base (23) outer rim and main casing (3) inner edge frictional fit.

6. injection needle according to claim 1 and 2, is characterized in that: described card lock bit architecture to be coordinated with draw-in groove (34) set on main casing (3) inner edge by attic base (23) outer rim and side end face, front and back and formed.

7. injection needle according to claim 1 and 2, is characterized in that: described end face is formed against coordinating against the anterior end surface of location structure by attic base (23) outer rim with the inner face of main casing (3) inner edge.

8. injection needle according to claim 1 and 2, it is characterized in that: outside described main casing (3), be provided with oversheath (8), this oversheath (8) is tube-in-tube structure, and under confined state, oversheath (8) is sleeved on main casing (3) outside before use, overall for the protection of described injection needle; Described trigger tube (5) relatively main casing (3) be provided with the spacing front end by trigger tube (5) that moves forward close to or lean and formed on the inner front end face of oversheath (8).