CN208958138U - Tail portion push type disposable safe hemostix - Google Patents

Abstract

A kind of tail portion push type disposable safe hemostix, including shell, needle core, spring and tail-hood, shell is equipped with the elastic arm for locking needle core, it is characterised in that: in active latch portion of the tail-hood setting for lock, the passive latch portion for lock is correspondingly arranged on elastic arm；By the position and cooperation time of active latch portion and passive latch portion, get up with the position and cooperation association in time of active solution lock section and passive solution lock section；Tail-hood is pressed when use, first needle core is forced to unlock, and transmitting punctures, and then tail-hood and elastic arm enter latch hook state, can not reuse.This programme extremely on the elastic arm of shell, not only ensure that disposable safety using rear tail-hood Permanent lock, but also can intuitively identify obvious indentation state is presented in shell tail portion using rear tail-hood from the appearance.

Description

Tail portion push type disposable safe hemostix

Technical field

The utility model relates to medical blood taking instrument field, in particular to a kind of tail portion push type disposable safe blood sampling Device.The hemostix carries ejection mechanism, not only has apparent mark after use and can not reuse, ensures that blood sampling The disposable safety of device.

Background technique

In Medical blood collecting device, disposable blood taking device is small in size with its, using it is safe, easy to operate for characteristic it is deep by medical care Personnel and patient welcome, and largely use in each medical institutions and diabetic at present.This hemostix carries ejection machine Structure, compact-sized, overall time uses, safe and convenient, therefore has very strong market development potential.

Chinese patent CN107007289A discloses one, and entitled " the rear pressure type with spring correcting structure is disposably taken a blood sample Device " invention patent application case.Although the patent innovation is to associate spring correcting structure with unlocking mechanism, cleverly It is realized using a structure and punctures correcting and unlock double effects, but the patent formula illustrates a kind of representative tail Portion's push type hemostix basic structure, i.e., be mainly made of shell, needle core, spring and tail-hood.In the assembled condition, needle core positions On the elastic arm of locking inside the shell, needle core and shell are slidably connected on needle point direction of ejection by sliding slot guiding；Before spring End acts on needle core, and rear end acts on tail-hood；Tail-hood is mounted on shell tail portion, and slides on needle point direction of ejection with shell Dynamic connection.When hemostix head is directed at blood sampling site, tail-hood is pressed, the inclined-plane on tail-hood forces elastic arm to open, to draw Hairpin core, which breaks off relations and generates shooting under the promotion of spring, to be punctured.

For above-mentioned tail portion push type hemostix although basic structure is mature, ejection mechanism is reliable, and design feature is distinct, but from The safety perspective used sees that there are still some shortcomings: first, it, from the appearance can not be direct due to being sprung back completely after tail-hood pressing Identification uses the form after preceding and use；Second, even if if hemostix brings out pin hole pushing tow also in the past with a needle using rear Needle core can be made to load to reuse.

The design of previous such product is more concern blood sampling effect, and with the continuous progress of technology and people are raw Running water is flat to be improved, and the theory of such product design is: under the premise of guaranteeing to take a blood sample effect, it is more pay close attention to safety in utilization and User experience.For this purpose, how the effective solution above problem be the utility model research project.

Summary of the invention

In view of above the shortcomings of the prior art, the utility model provides a kind of tail portion push type disposable safe blood sampling Device, its purpose is to solve the not reusable safety issue of tail portion push type hemostix.

In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of tail portion push type disposable safe hemostix, Including shell, needle core, spring and tail-hood.

The shell forms an ejection chamber, and needle core is located in ejection chamber, extends internally on shell and be provided with elastic arm, elasticity Arm is equipped with grab or the end face for being used to lock needle core, and the grab is corresponded on needle core or end face is equipped with snap-latch surface；To be launched Under state, the front end of spring is pressed against on needle core, and the snap-latch surface of needle core presses against on the grab or end face of elastic arm, makes needle with this Core position and lock is in the ejection chamber of shell.

The tail-hood is mounted on shell tail portion, tail-hood and shell and is slidably connected in the hemostix axial direction, and tail-hood is opposite Limit is equipped in the rear end of glide direction in shell；Under battery, the rear end of spring is pressed against on tail-hood, forces tail-hood The rear end restraining position of glide direction is in relative to shell.

The tail-hood is equipped with active solution lock section, which is equipped with effect end, and the corresponding active solution lock section exists Elastic arm is equipped with passive solution lock section, which is equipped with effect end, the effect end of active solution lock section and passive unlock In the effect end the two in portion, at least one is unlock inclined-plane.

Its innovation is: the tail-hood is equipped with active latch portion, which is equipped with effect end, the corresponding master Dynamic latch portion is equipped with passive latch portion on elastic arm, which is equipped with effect end, the effect end of active latch portion With in both effect ends of passive latch portion, one is equipped with latch hook, and another one is equipped with sealed face.

It is axially reference with hemostix under battery, active solution lock section acts on end and acts on end to passive solution lock section In axial projector distance, less than or greater than active latch portion effect end to passive latch portion effect end axial direction projection away from From；It is radially reference with hemostix, active latch portion acts on end to the distance of hemostix radial center, is greater than passive latch portion and makees The distance of hemostix radial center is arrived with end.

In a state of use, when pushing tail-hood, tail-hood is moved forward relative to shell, and the active solution lock section on tail-hood is made The passive solution lock section on elastic arm is met head-on with end and acts on end, and forces elastic arm end laterally to be opened under the action of unlocking inclined-plane Open, when on elastic arm grab or end face be detached from locking critical point after needle core emit puncture under the action of the spring；After transmitting punctures, Since elastic arm end is in lateral open configuration, so that the distance that passive latch portion acts on end to hemostix radial center is close Active latch portion acts on end to the distance of hemostix radial center, and tail-hood continues to move along at this time, the active lock on tail-hood Portion acts on the passive latch portion on end and elastic arm and acts on end, is cooperated by latch hook and sealed face, forces tail-hood and elasticity Arm enters latch hook state, and tail-hood is in indentation state in hemostix tail portion under latch hook state.

The related content and change interpretation of above-mentioned technical proposal are as follows:

1. in above scheme, " shell ", " needle core ", " spring " and " tail-hood " is tail portion push type disposable blood taking device Basic structure, basic function and effect are the prior art.

2. in above scheme, " front end ", " front " and " preceding " in " forward " refers to needle point meaning side in hemostix To." rear " in " rear end " refers to the opposite direction of " preceding ".

3. in above scheme, how " inclined-plane " in " the unlock inclined-plane " includes plane, cambered surface or the conical surface, however, Opposite hemostix axis is obliquely installed, to constitute inclined-plane.In other words, inclined-plane has inclined-plane, the concave form of plane form (inclined-plane is in an inclined direction made of multistage straight line, is upwardly formed concave surface or convex surface in vertical tilt side, but essence is also on inclined-plane Inclined-plane), (inclined-plane is in an inclined direction by least one section of concave arc or/and convex for the inclined-plane of the inclined-plane of conical surface form and cambered surface form Arc is constituted, but essence or inclined-plane) four seed types.It is any applicable in the present invention, it specifically can be according to reality Situation determines.Wherein, the first is the inclined-plane of plane form；It is for second the inclined-plane of concave form；The third is cone-shaped The inclined-plane of formula；4th kind be cambered surface form inclined-plane.

4. in above scheme, the case head can install an adjusting header structure additional again, to realize that paracentesis depth can It adjusts.This has no effect on realization the utility model aim.

5. the utility model tail portion push type hemostix includes to turn round two kinds of structures of shape for hat and nut cap type.That is the utility model one Secondary property hemostix usual situation has protective cap, and the structure type of protective cap can be using torsion shape for hat or nut cap type.This is simultaneously It does not influence to realize the object of the invention.

The design principle of the utility model and design are: in order to solve, tail portion push type hemostix is not reusable to be asked Topic, the utility model is using following technical concept: first, in active latch portion of the tail-hood setting for lock, in elastic arm On be correspondingly arranged passive latch portion for lock；Second, in hemostix, by the position of active latch portion and passive latch portion It associates with the position of active solution lock section and passive solution lock section, i.e. cooperation between active latch portion and passive latch portion is in place It sets dependent on the cooperation between active solution lock section and passive solution lock section；Third, in hemostix, by active latch portion and passively The cooperation association in time of cooperation time and active solution lock section and passive solution lock section between latch portion get up, and generate as defined in one kind Sequential relationship, i.e., only active solution lock section first cooperates in time with passive solution lock section, can just there is active latch portion and quilt Dynamic latch portion cooperates afterwards in time.

Due to the application of the above technical scheme, the utility model has the following advantages that and effect compared with prior art:

1. after the utility model hemostix use, since tail-hood permanently locks on the elastic arm of shell, even if using one Root needle brings out pin hole pushing tow needle core in the past and is also impossible to be allowed to load to reuse, so that making this hemostix really becomes primary The medical blood taking product that property uses, theoretically ensure that disposable safety.

2., since tail-hood permanently locks on the elastic arm of shell, tail-hood is in shell tail after the utility model blood device use Obvious indentation state is presented in portion, and it is preceding different with form after use can intuitively to identify that hemostix uses from the appearance.This effect Fruit not only contributes to safe handling hemostix, but also user experience is more preferable.

3. the structure design of the utility model is reasonable, technical concept is ingenious, has well solved tail portion push type hemostix not Reusable problem has substantive distinguishing features outstanding and significant progress compared with prior art.

Detailed description of the invention

Fig. 1 is the utility model embodiment hemostix perspective view；

Fig. 2 is the utility model embodiment hemostix stereogram exploded view；

Fig. 3 is the first view stereo of the utility model embodiment shell figure；

Fig. 4 is the second view stereo of the utility model embodiment shell figure；

Fig. 5 is the utility model embodiment needle core and torsion cap perspective view；

Fig. 6 is the needle core enlarged drawing in Fig. 5；

Fig. 7 is the first view stereo of the utility model embodiment tail-hood figure；

Fig. 8 is the second view stereo of the utility model embodiment tail-hood figure；

Fig. 9 is the utility model embodiment with tail-hood end face be reference A-A section view orientation diagram；

Figure 10 is the utility model embodiment with tail-hood end face be reference B-B section view orientation diagram；

Figure 11 is the initial assembled state A-A cross-sectional view of the utility model embodiment；

Figure 12 is the initial assembled state B-B cross-sectional view of the utility model embodiment；

Figure 13 is that the utility model embodiment twists off the battery A-A cross-sectional view for turning round cap；

Figure 14 is that the utility model embodiment twists off the battery B-B cross-sectional view for turning round cap；

Figure 15 is that the utility model embodiment twists off the battery perspective view for turning round cap；

Figure 16 is the partial enlarged view in Figure 15；

Figure 17 is that the utility model embodiment starts to press tail-hood state A-A cross-sectional view；

Figure 18 is that the utility model embodiment starts to press tail-hood state B-B cross-sectional view；

Figure 19 is state A-A cross-sectional view before the utility model embodiment emits；

Figure 20 is state B-B cross-sectional view before the utility model embodiment emits；

Figure 21 is the utility model embodiment emission state A-A cross-sectional view；

Figure 22 is the utility model embodiment emission state B-B cross-sectional view；

Figure 23 is state A-A cross-sectional view after the utility model embodiment transmitting；

Figure 24 is state B-B cross-sectional view after the utility model embodiment transmitting；

Figure 25 is that the utility model embodiment uses rear state A-A cross-sectional view；

Figure 26 is that the utility model embodiment uses rear state B-B cross-sectional view；

Figure 27 is tail-hood presentation indentation state perspective view after the utility model embodiment transmitting；

Figure 28 is another change programme schematic diagram of the utility model embodiment.

Label declaration in the figures above is as follows:

1. shell；2. needle core；3. spring；4. tail-hood；5. elastic arm；6. grab；7. contractible neck；8. snap-latch surface；9. going out needle Hole；10. unlocking inclined-plane；11. turning round cap；12. active solution lock section；13. passive solution lock section；14. active latch portion；15. torsional part； 16. guard bar；17. passive latch portion；18. latch hook；19. sealed face；20. notch；21. boss；22. elastic foot；23. convex ribs； 24. outer hook；25. gap.

Specific embodiment

The utility model is further described with reference to the accompanying drawings and embodiments:

A kind of embodiment: tail portion push type disposable safe hemostix

The hemostix is made of shell 1, needle core 2, torsion cap 11, spring 3 and tail-hood 4 (see Fig. 1 and Fig. 2).

The shell 1 forms an ejection chamber, and ejection chamber front end is equipped with needle outlet 9(and sees Fig. 3 and Fig. 4), it opens up in needle outlet 9 Jagged 20(is shown in Fig. 4, Figure 12 and Figure 14).Needle core 2 is located in ejection chamber, and there are two elastic arms 5 for the setting that extends internally on shell 1 (see Fig. 3, Fig. 4 and Figure 11), elastic arm 5, which is equipped with to be used to lock the grab 6(of needle core 2, sees Figure 11), the card is corresponded on needle core 2 Hook 6 is equipped with snap-latch surface 8(and sees Fig. 5, Fig. 6 and Figure 11).Under battery, the front end of spring 3 is pressed against on needle core 2, needle core 2 Snap-latch surface 8 press against on the grab 6 of elastic arm 5, make 2 position and lock of needle core in the ejection chamber of shell 1 (see Figure 13) with this.

The needle core 2 and torsion cap 11 are integrally formed component (see Fig. 5 and Fig. 6), are constituted with this and turn round shape for hat tail portion push type Disposable blood taking device.The torsion cap 11 is located at 2 front of needle core, and links into an integrated entity injection molding structure with needle core 2, turn round cap 11 by Torsional part 15 is fixedly connected with composition with guard bar 16, and the contractible neck 7 that can be twisted off is provided between guard bar 16 and needle core 2.Institute State 2 side of needle core and see Fig. 6 equipped with elastic foot 22(), the corresponding elastic foot 22 be equipped on 1 inner wall of shell convex ribs 23(see Figure 13 and Figure 17).In 2 emission process of needle core, elastic foot 22 and 23 frictional fit of convex ribs are used to prevent secondary puncture.The torsion cap 11 It is equipped with boss 21(between torsional part 15 and guard bar 16 and sees Fig. 5 and Figure 11), which is used to prevent under initial assembled state It only mistakenly launches and (its working principle is described in detail when the course of work is described below).

The tail-hood 4(is shown in Fig. 7 and Fig. 8) it is mounted on 1 tail portion of shell (see Figure 11 and Figure 12), tail-hood 4 is with shell 1 described It is slidably connected in hemostix axial direction, tail-hood 4 is equipped with limit in the rear end of glide direction relative to shell 1.It can from Figure 11 Out, about 4 tail-hood is respectively provided with an outer hook 24(and can also find out from Fig. 7 and Fig. 8), which is located at the sliding slot of shell 1 In, so that tail-hood 4 can be hooked in shell 1 in hemostix axis upward sliding with opposite shell 1.Under battery, after spring 3 End presses against on tail-hood 4, and outer hook 24 is hooked on the rear end face of 1 sliding slot of shell, and tail-hood 4 is forced to be in sliding side relative to shell 1 To rear end restraining position.

The tail-hood 4 is equipped with active solution lock section 12(and sees Fig. 7, Fig. 8 and Figure 11), which is equipped with effect End, the corresponding active solution lock section 12 are equipped with passive solution lock section 13(on elastic arm 5 and see Figure 11), which is equipped with End is acted on, the effect end of active solution lock section 12 is the turning (see Fig. 7, Fig. 8 and Figure 11) of convex block, the effect end of passive solution lock section 13 Figure 11 is seen for unlock inclined-plane 10().

The tail-hood 4 is equipped with active latch portion 14(and sees Fig. 7, Fig. 8 and Figure 11), which is equipped with effect End, the corresponding active latch portion 14 are equipped with passive latch portion 17(on elastic arm 5 and see Figure 11), which is equipped with End is acted on, the effect end of active latch portion 14 is equipped with latch hook 18(and sees Figure 11), the effect end of passive latch portion 17 is equipped with lock Conjunction face 19(is shown in Figure 11).

It is axially reference with hemostix under battery, active solution lock section 12 acts on end (position) to passive solution Lock section 13 acts on end (position) in axial projector distance, is less than active latch portion 14 and acts on end (position) to passive lock Portion 17 acts on end (position) in axial projector distance (see Figure 13).It is radially reference with hemostix, active latch portion 14 is made The distance of hemostix radial center is arrived with end (position), and it is radial to hemostix to be greater than passive latch portion 17 effect end (position) The distance (see Figure 13) at center.

The initial assembled state of the utility model embodiment and use operating process are as follows:

1. initial assembled state

Referring to shown in Figure 11 and Figure 12, needle core 2 and torsion cap 11 are an integral molding structure, the protection on needle core 2 and torsion cap 11 Bar 16 is located in shell 1, and the torsional part 15 turned round on cap 11 is located at outside 1 front end of shell.It is set between torsional part 15 and guard bar 16 Boss 21 be resisted against on the inner face of 1 front end needle outlet 9 of shell.3 front end of spring presses against the rear portion of needle core 2,3 rear end of spring It presses against on tail-hood 4, the outer hook 24 of tail-hood 4 is hooked on the rear end face of 1 sliding slot of shell, is slided so that tail-hood 4 is in relative to shell 1 The rear end restraining position in dynamic direction.In this case, the grab 6 on elastic arm 5 is in non-locking with the snap-latch surface 8 on needle core 2 State (is separated between the two, is not engaged, see Figure 11).Even if tail-hood 4 is pressed at this time, since boss 21 is resisted against shell On the inner face of 1 front end needle outlet 9, hemostix will not be made to generate transmitting movement, i.e., in the case where torsion cap 11 does not take out, pressed Pressure tail-hood 4 can not trigger the transmitting of needle core 2.Therefore in the mistake that the effect of initial assembled state lower convex platform 21 is for preventing hemostix Transmitting.

2. battery

Referring to shown in Figure 13 and Figure 14, hemostix will first twist off cap 11 using preceding, i.e., will first turn round cap 11 and twist 90 °, compel Make to turn round cap 11 and needle core 2 occur to be broken (see figure 5) at contractible neck 7, and boss 21 is allowed to be directed at the notch 20 on needle outlet 9, Then it extracts torsion cap 11(and sees Figure 15 and Figure 16).At this point, needle core 2 moves forward 2mm under the active force of spring 3, on needle core 2 Snap-latch surface 8 is blocked by the grab 6 on elastic arm 5, locks needle core 2 by the grab 6 on elastic arm 5, hence into shape to be launched State.

3. starting to press tail-hood state

Referring to shown in Figure 17 and Figure 18, the needle outlet 9 on hemostix head is directed at human blood collection position when use, start by Pressure tail-hood 4(is shown in the arrow in Figure 17 and Figure 18), tail-hood 4 moves forward, and the effect end of the active solution lock section 12 on tail-hood 4 is (convex The turning of block) it contacts with the effect end (unlock inclined-plane 10) of the passive solution lock section 13 on elastic arm 5 (see Figure 17).

4. state before emitting

Referring to shown in Figure 19 and Figure 20, continuing to press tail-hood 4, the active solution lock section 12 on tail-hood 4 acts on end, and (convex block is turned Angle) it meets passive solution lock section 13 on elastic arm 5 head-on and acts on end (unlock inclined-plane 10), and bullet is forced under the action of unlocking inclined-plane 10 Property 5 end of arm is laterally opened (see the lateral opening arrow in Figure 19), while gap 25 gradually becomes figure by larger in Figure 17 It is smaller in 19.The gap 25 is exactly that active latch portion 14 acts on end (position) and passive latch portion 17 effect end (position) Hemostix radial difference away from.

5. emission state

Referring to fig. 2 shown in 1 and Figure 22, continue to press tail-hood 4, the needle after grab 6 on elastic arm 5 is detached from locking critical point Core 2 issues in the effect of spring 3 and is shot through thorn, completes blood sampling (see Figure 21).After transmitting punctures, since 5 end of elastic arm is in lateral Open configuration, so that passive latch portion 17, which acts on end, acts on end (gap 25 close to zero) close to active latch portion 14, tail-hood 4 at this time It continues to move along, the active latch portion 14 on tail-hood 4 acts on the passive latch portion 17 on end and elastic arm 5 and acts on end, passes through Latch hook 18 and sealed face 19 cooperate, and force tail-hood 4 and elastic arm 5 to enter latch hook state, tail-hood 4 can not rebound (see figure 21).Tail-hood 4 is in indentation state in hemostix tail portion under latch hook state (see Figure 27).

6. state after transmitting

Referring to fig. 2 shown in 3 and Figure 24, when needle core 2 emits, the elastic foot 22 of needle core 2 is smoothly crossed on 1 inner wall of shell Convex ribs 23.After completing blood sampling, the convex ribs 23 on 1 inner wall of shell will increase the frictional force between 2 elastic foot 22 of needle core, so that needle core Elastic foot 22 on 2 can not cross the convex ribs 23 on 1 inner wall of shell, to achieve the purpose that prevent secondary puncture (see figure 24).

7. using rear state

Referring to fig. 2 shown in 5 and Figure 26, the stable state after use is entered using rear tail-hood 4, spring 3 and needle core 2.

It is explained as follows below for other performances and structure change of the utility model:

1. in above embodiments, the active solution lock section 12 and active latch portion 14 are two physical locations on tail-hood 4 (see Figure 11), and passive solution lock section 13 and passive latch portion 17 share a physical location on elastic arm 5 (see Figure 11).But this Utility model is not limited to this, can also be by following several versions:

(1) active solution lock section 12 and active latch portion 14 a shared physical location on tail-hood 4, and passive solution lock section 13 A physical location is shared on elastic arm 5 with passive latch portion 17 (see Figure 28).

(2) active solution lock section 12 and active latch portion 14 are two physical locations on tail-hood 4, and 13 He of passive solution lock section Passive latch portion 17 is two physical locations on elastic arm 5.

(3) active solution lock section 12 and active latch portion 14 a shared physical location on tail-hood 4, and passive solution lock section 13 It is two physical locations on elastic arm 5 with passive latch portion 17.

2. in above embodiments, the setting that extends internally on shell 1 is shown in Figure 11 there are two elastic arm 5().But the utility model It is not limited to this, the utility model in addition to two elastic arms 5 in above embodiments and other than, can also be by following several variation shapes Formula:

(1) 5 quantity of elastic arm set on shell 1 is one, and the elastic arm 5 and 1 inner wall of shell form an elastic clip For locking needle core 2.

(2) 5 quantity of elastic arm set on shell 1 is three, circumferencial direction of all elastic arm 5 in 1 cross section of shell On be uniformly distributed, and an elastic clip is collectively formed for locking needle core 2.

(3) 5 quantity of elastic arm set on shell 1 is four, circumferencial direction of all elastic arm 5 in 1 cross section of shell On be uniformly distributed, and an elastic clip is collectively formed for locking needle core 2.

(4) 5 quantity of elastic arm set on shell 1 is five, circumferencial direction of all elastic arm 5 in 1 cross section of shell On be uniformly distributed, and an elastic clip is collectively formed for locking needle core 2.

5 quantity of elastic arm is even more, this be skilled addressee readily understands that situation of change.

3. in above embodiments, the elastic arm 5 is equipped with the grab 6 for being used to lock needle core 2.The utility model can incite somebody to action Grab 6 is changed to end face, and needle core 2 is locked with the form of end face can equally obtain identical technical effect, this is this field skill Art personnel it will be appreciated that and cognition the case where.

4. being axially reference with hemostix under battery, active solution lock section 12 acts on end in above embodiments (position) in axial projector distance, is less than active latch portion 14 and acts on end to passive solution lock section 13 effect end (position) (position) is to passive latch portion 17 effect end (position) in axial projector distance (see Figure 13).In addition to this, this is practical The novel active solution lock section 12 that is also possible to acts on end (position) to passive solution lock section 13 effect end (position) in axial throwing Shadow distance is greater than active latch portion 14 and acts on end (position) to passive latch portion 17 effect end (position) in axial projection Distance.Because active solution lock section 12 act on end (position) to passive solution lock section 13 effect end (position) axial projection away from From, be equal to active latch portion 14 act on end (position) to passive latch portion 17 effect end (position) axial projection away from When, the unlock of needle core 2 and the lock of tail-hood 4 are easy to happen interference, and leading to the work of hemostix, there are unstability.

5. in above embodiments, the effect end of passive solution lock section 13 is unlock inclined-plane 10.But the utility model is not limited to This, the unlock inclined-plane 10 can be located at the effect end of active solution lock section 12, can also be located at the work of active solution lock section 12 simultaneously With on end and the effect end of passive solution lock section 13.

6. in above embodiments, the effect end of active latch portion 14 is equipped with latch hook 18(and sees Figure 11), passive latch portion 17 Effect end be equipped with sealed face 19(see Figure 11).But the utility model is not limited to this, can also be active latch portion 14 Sealed face 19 is set on effect end, and latch hook 18 is set on the effect end of passive latch portion 17.

7. in above embodiments, 2 front of needle core, which is equipped with, turns round cap 11, it is disposable to be constituted torsion shape for hat tail portion push type with this Hemostix structure, read the utility model after one skilled in the art will appreciate that the utility model is equally applicable to nut cap type tail portion Push type disposable blood taking device structure, i.e. 2 front of needle core are equipped with nut cap, are constituted nut cap type tail portion push type with this and disposably taken a blood sample Device.

8. in above embodiments, the adjusting header structure that can change paracentesis depth is not designed on hemostix head.To understand Paracentesis depth regulation problem when certainly taking a blood sample, can be on 1 head of shell equipped with the adjusting header structure that can change paracentesis depth.And change Become paracentesis depth adjusting header structure can be realized using the prior art, this be skilled addressee readily understands that variation Situation.

The above embodiments are only for explaining the technical ideas and features of the present invention, and its object is to allow be familiar with technique Personage can understand the content of the utility model and implement accordingly, do not limit the protection scope of the present invention. All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover the protection scope of the utility model it It is interior.

Claims (9)

1. a kind of tail portion push type disposable safe hemostix, including shell (1), needle core (2), spring (3) and tail-hood (4)；

The shell (1) forms an ejection chamber, and needle core (2) is located in ejection chamber, extends internally on shell (1) and be provided with elastic arm (5), elastic arm (5), which is equipped with, is used to lock grab (6) or the end face of needle core (2), corresponded on needle core (2) grab (6) or End face is equipped with snap-latch surface (8)；Under battery, the front end of spring (3) is pressed against on needle core (2), the snap-latch surface of needle core (2) (8) it presses against on the grab (6) or end face of elastic arm (5), makes needle core (2) position and lock in the ejection chamber of shell (1) with this；

The tail-hood (4) is mounted on shell (1) tail portion, and tail-hood (4) is slidably connected in the hemostix axial direction with shell (1), Tail-hood (4) is equipped with limit in the rear end of glide direction relative to shell (1)；Under battery, the rear end of spring (3) is pressed On tail-hood (4), tail-hood (4) is forced to be in the rear end restraining position of glide direction relative to shell (1)；

The tail-hood (4) is equipped with active solution lock section (12), which is equipped with effect end, and corresponding this actively solves Lock section (12) is equipped with passive solution lock section (13) on elastic arm (5), which is equipped with effect end, actively unlocks In both the effect end in portion (12) and the effect end of passive solution lock section (13), at least one is unlock inclined-plane (10)；

It is characterized by: the tail-hood (4) is equipped with active latch portion (14), which is equipped with effect end, The corresponding active latch portion (14) is equipped with passive latch portion (17) on elastic arm (5), which, which is equipped with, makees With end, in both effect ends of the effect end of active latch portion (14) and passive latch portion (17), one is equipped with latch hook (18), Another one is equipped with sealed face (19)；

It is axially reference with hemostix under battery, active solution lock section (12) acts on end and makees to passive solution lock section (13) With end in axial projector distance, it is less than or greater than active latch portion (14) and acts on end to passive latch portion (17) effect end in axis To projector distance；It is radially reference with hemostix, active latch portion (14) acts on end to the distance of hemostix radial center, greatly Distance in passive latch portion (17) effect end to hemostix radial center；

In a state of use, when pushing tail-hood (4), tail-hood (4) is moved forward relative to shell (1), the active on tail-hood (4) The effect of the passive solution lock section (13) on elastic arm (5) end is met at solution lock section (12) effect end head-on, and in the effect of unlock inclined-plane (10) Under force elastic arm (5) end laterally to be opened, when on elastic arm (5) grab (6) or end face be detached from locking critical point after needle core (2) it is issued in spring (3) effect and is shot through thorn；After transmitting punctures, since elastic arm (5) end is in lateral open configuration, so that Passive latch portion (17) acts on end and acts on end to hemostix diameter to the distance of hemostix radial center close to active latch portion (14) To the distance at center, tail-hood (4) is continued to move along at this time, active latch portion (14) effect end and elastic arm on tail-hood (4) (5) the passive latch portion (17) on acts on end, is cooperated by latch hook (18) and sealed face (19), forces tail-hood (4) and bullet Property arm (5) enter latch hook state, tail-hood (4) is in indentation state in hemostix tail portion under latch hook state.

2. hemostix according to claim 1, it is characterised in that: the active solution lock section (12) and active latch portion (14) A physical location is shared on tail-hood (4), and passive solution lock section (13) and passive latch portion (17) share on elastic arm (5) One physical location.

3. hemostix according to claim 1, it is characterised in that: the active solution lock section (12) and active latch portion (14) It is two physical locations on tail-hood (4), and passive solution lock section (13) and passive latch portion (17) they are two on elastic arm (5) Physical location.

4. hemostix according to claim 1, it is characterised in that: elastic arm (5) quantity set by the shell (1) is extremely It is less two, all elastic arm (5) is uniformly distributed on the circumferencial direction of shell (1) cross section, and a bullet is collectively formed Property folder for locking needle core (2).

5. hemostix according to claim 1, it is characterised in that: set elastic arm (5) quantity is on the shell (1) One, the elastic arm (5) and shell (1) inner wall form an elastic clip for locking needle core (2).

6. hemostix according to claim 1, it is characterised in that: needle core (2) front, which is equipped with, turns round cap (11), with this structure At torsion shape for hat tail portion push type disposable blood taking device.

7. hemostix according to claim 6, it is characterised in that: the torsion cap (11) is located at needle core (2) front, and and needle Core (2) links into an integrated entity injection molding structure, turns round cap (11) and is fixedly connected by torsional part (15) with guard bar (16) and constitutes, protection The contractible neck (7) that can be twisted off is provided between bar (16) and needle core (2).

8. hemostix according to claim 1, it is characterised in that: needle core (2) front is equipped with nut cap, is constituted lid with this Shape for hat tail portion push type disposable blood taking device.

9. hemostix according to claim 1, it is characterised in that: shell (1) head, which is equipped with, can change puncture deeply The adjusting header structure of degree.