CN103989484B - Prevent the disposable automatic blood-taking needle of secondary puncture - Google Patents
Prevent the disposable automatic blood-taking needle of secondary puncture Download PDFInfo
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- CN103989484B CN103989484B CN201410255592.1A CN201410255592A CN103989484B CN 103989484 B CN103989484 B CN 103989484B CN 201410255592 A CN201410255592 A CN 201410255592A CN 103989484 B CN103989484 B CN 103989484B
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Abstract
A kind of disposable automatic blood-taking needle preventing secondary puncture, comprise housing, nook closing member and spring, nook closing member and spring are all located in the ejection chamber of housing, nook closing member and ejection chamber are slidably matched, spring action is in nook closing member, housing is provided with trigger button, latching structure is provided with between nook closing member sidepiece and housing, it is characterized in that: nook closing member sidepiece and housing or push away between hair device ejection chamber inwall and be provided with the constraint mechanism preventing secondary puncture, this constraint mechanism is made up of the elastic hook be located on nook closing member sidepiece and the draw-in groove be located on ejection chamber inwall.The present invention utilizes two of draw-in groove differences in height that medial surface exists on groove depth direction, after pressing blood taking needle, nook closing member is quick sliding forward under spring promotes, now elastic hook crosses draw-in groove, realize shooting puncture for the first time, but nook closing member falls into draw-in groove due to the coupler body of elastic hook and vibrates back and forth, until nook closing member stop motion in springback process.Because constraint mechanism effect nook closing member can not produce secondary puncture.
Description
Technical field
The present invention relates to medical disposable automatic blood-taking needle.This blood taking needle can effectively prevent in blood collection procedure because secondary puncture is to the misery brought by user.
Background technology
Disposable automatic blood-taking needle refers to the disposable blood taking needle with automatic ejection structure.For many years this kind of blood taking needle be in always update with develop among, current this automatic blood-taking needle moves to maturity just gradually, and becomes the main flow of current medical blood taking device.
Disposable automatic blood-taking needle comprises housing, nook closing member and spring three part usually; wherein; housing forms an ejection chamber; nook closing member and spring are all located in ejection chamber, and spring action, in the rear end of nook closing member, is provided with the needle body of band needle point in nook closing member; needle point is positioned at nook closing member front end and cover has a guard bar or protective sleeve; guard bar or protective sleeve stretch out from housing forward end, and housing is provided with button, are provided with latching structure between nook closing member and housing.
Chinese patent CN102028480A discloses a name and is called " improved safety portable disposable automatic blood-taking needle ", and application number is the application for a patent for invention of 201010596791.0, see accompanying drawing 1.As a kind of disposable automatic blood-taking needle with Typical Representative meaning, no matter the technical scheme of this patent application is from the safety perspective used, or the convenience angle used all can be referred to as a Classic couture, the program embodies advanced technology compared with other disposable automatic blood-taking needle in the past, easy and simple to handle, the feature of use safety.But, to the puncture rule formed by user after launching from this kind of blood taking needle, most disposable automatic blood-taking needle all forms repeatedly repeated puncture to by user after launching, and observe blood taking needle primary emission and can reach at most 7 punctures, and repeatedly puncturing hole position is different through high-speed photography.This is brought stronger pain by user, or even painful.Accompanying drawing 2-7 demonstrates above-mentioned patent formula after primary emission, forms the process repeatedly punctured, and wherein, the process of first time puncture after being primary emission from accompanying drawing 2 to accompanying drawing 7, then repeats, back until nook closing member stop motion between accompanying drawing 5 to accompanying drawing 7.Analyze theoretically, when this kind of blood taking needle is launched, power spring is freely undue in spring cavity after elastic potential energy release, because inertia nook closing member cannot stop motion at once after primary emission, need experience repeatedly back and forth damped vibration, drive needle point back and forth to puncture, until elastic potential energy is by frictional force approach exhaustion, just stop.
In order to address this problem, in prior art, once someone adopts dual spring measure, namely uses a spring as the power spring launched, uses another spring as shock-absorbing spring, after power spring is launched, utilize shock-absorbing spring to cushion, thus reduce back and forth puncture.But the shortcoming that this design brings is: add parts, cause complex structure, assembling is complicated, and cost is high.In addition the design effect of shock-absorbing spring is also difficult to hold accurately between theory and practice.
For this reason, the present invention to improve from preventing the constraint mechanism angle of secondary puncture from starting with above-mentioned prior art, to overcome the deficiency that prior art exists.
Summary of the invention
In view of the shortcoming of above prior art, the invention provides a kind of disposable automatic blood-taking needle preventing secondary puncture, its objective is the repeatedly repeated puncture problem that will solve above-mentioned existing disposable automatic blood-taking needle and exist.
For achieving the above object, the first technical scheme that the present invention adopts is: a kind of disposable automatic blood-taking needle preventing secondary puncture, comprises housing, nook closing member and spring, wherein:
Housing forms an ejection chamber, and nook closing member and spring are all located in ejection chamber, and nook closing member and ejection chamber are slidably matched on direction of ejection, and spring acts on nook closing member on direction of ejection; Nook closing member is provided with the needle body of band needle point, and needle point is positioned at nook closing member front end; Housing is provided with trigger button, is provided with latching structure between nook closing member sidepiece and housing.
Its innovation is: be provided with the constraint mechanism preventing secondary puncture between described nook closing member sidepiece and housing ejection chamber inwall, and this constraint mechanism is made up of the elastic hook be located on nook closing member sidepiece and the draw-in groove be located on housing ejection chamber inwall.
Described elastic hook is made up of elastic arm and coupler body, and elastic arm extends back nook closing member sidepiece is oblique, coupler body be positioned at the arm end of elastic arm and also hook forward curved.
The cross section of described draw-in groove on housing fore-and-aft direction is Baltimore groove, the top of this Baltimore groove relative to ejection chamber rear or/and the inwall in front is protruding, Baltimore groove has the first medial surface and the second medial surface, first medial surface is by ejection chamber rear, second medial surface is by ejection chamber front, on the groove depth direction of Baltimore groove, the height of the first medial surface is greater than the height of the second medial surface, be connected by the first inclined-plane between the top of the first medial surface and the inwall at ejection chamber rear, be connected by the second inclined-plane between the top of the second medial surface and the inwall in ejection chamber front; Distance on the groove width direction of Baltimore groove between the first medial surface with the second medial surface is greater than one times of corresponding width of coupler body, is less than the corresponding width of two times of coupler bodies simultaneously.
For achieving the above object, the second technical scheme that the present invention adopts is: a kind of disposable automatic blood-taking needle preventing secondary puncture, comprises sleeve shell, end cap, nook closing member, spring and push away hair device, wherein:
End cap covers in sleeve shell port, end cap stretches out a pair elastic claw thus forms elastic clip in sleeve shell, nook closing member is clamped between elastic clip, on the direction of ejection of spring action between nook closing member rear portion and end cap, elastic clip end utilizes grab and chucking power to be blocked by nook closing member, forms latching structure.
Pushing away hair device slip is located in sleeve shell, push away corresponding two elastic claws of hair device to be head-on provided with and to force its inclined-plane be separated to both sides or conical surface, the hollow space pushing away hair device is ejection chamber, and push away hair device front portion from sleeve shell, stretch out a blood sampling end face, blood sampling end face central authorities are provided with needle outlet.
Its innovation is: described nook closing member sidepiece and push away between hair device ejection chamber inwall and be provided with the constraint mechanism preventing secondary puncture, and this constraint mechanism is by the elastic hook be located on nook closing member sidepiece and be located at the draw-in groove pushed away on hair device ejection chamber inwall and form.
Described elastic hook is made up of elastic arm and coupler body, and elastic arm extends back nook closing member sidepiece is oblique, coupler body be positioned at the arm end of elastic arm and also hook forward curved.
Described draw-in groove is Baltimore groove pushing away the cross section on hair device fore-and-aft direction, the top of this Baltimore groove relative to ejection chamber rear or/and the inwall in front is protruding, Baltimore groove has the first medial surface and the second medial surface, first medial surface is by ejection chamber rear, second medial surface is by ejection chamber front, on the groove depth direction of Baltimore groove, the height of the first medial surface is greater than the height of the second medial surface, be connected by the first inclined-plane between the top of the first medial surface and the inwall at ejection chamber rear, be connected by the second inclined-plane between the top of the second medial surface and the inwall in ejection chamber front; Distance on the groove width direction of Baltimore groove between the first medial surface with the second medial surface is greater than one times of corresponding width of coupler body, is less than the corresponding width of two times of coupler bodies simultaneously.
Related content in above-mentioned first technical scheme and the second technical scheme is explained as follows:
1., in above-mentioned two schemes, " front " in described " front end ", " forward ", " front and back ", " front " refers to using blood taking needle of the present invention overall as the direction with reference to needle point indication." afterwards " in described " backward ", " front and back ", " rear ", " rear portion " refers to the opposite direction of " front ".
2. above-mentioned two schemes all have employed open statement; i.e. " comprising ... ", its reason may also comprise other structural members for a specific embodiment, also comprise in such as embodiment 1 guard bar (or claim protective sleeve; safety helmet), and also comprise block in embodiment 2.
3. in above-mentioned two schemes, described " top of Baltimore groove " refers to the opening of Baltimore groove, if Baltimore groove is inverted opening in the example shown, down, Baltimore groove is along putting opening then upward.
4., in above-mentioned two schemes, described " the corresponding width of coupler body " refers to the corresponding width of coupler body on Baltimore groove groove width direction.
5. in above-mentioned two schemes, the quantity of related elastic hook and draw-in groove and Layout Problem.In theory the quantity of elastic hook and draw-in groove arrange on same cross section a pair, two to, three to or four right, then to there is no need more.Often pair is formed by an elastic hook and a draw-in groove corresponding matching.In the present invention, preferably scheme be described elastic hook and draw-in groove quantitatively by two to forming, often pair is formed by an elastic hook and a draw-in groove corresponding matching, two pairs between elastic hook and draw-in groove with the centrage of housing or sleeve shell fore-and-aft direction for reference symmetry is arranged.
Design principle of the present invention and effect are: the present invention relates to a kind of disposable automatic blood-taking needle, in order to solve the repeatedly repeated puncture problem that disposable automatic blood-taking needle in the past exists, the present invention is at nook closing member sidepiece and housing or push away between hair device ejection chamber inwall and be provided with the constraint mechanism preventing secondary puncture, and this constraint mechanism is made up of the elastic hook be located on nook closing member sidepiece and the draw-in groove be located on ejection chamber inwall.The present invention utilizes two of draw-in groove differences in height that medial surface exists on groove depth direction, after pressing blood taking needle, nook closing member spring promote under along ejection chamber quick sliding forward, the elastic hook of nook closing member sidepiece crosses draw-in groove simultaneously, make blood taking needle realize shooting puncture for the first time, but the coupler body of nook closing member due to elastic hook in springback process falls into draw-in groove, and vibrate back and forth in draw-in groove, until nook closing member stop motion, thus the relative housing of the needle point on nook closing member is made to produce secondary puncture.Feature of the present invention is: the first, and structure is simple, is skillfully constructed; Second; Do not increase other structural members, can obtain as long as carry out improvement to original mould, almost not increase cost; 3rd, observe through high-speed photography, can effectively avoid secondary puncture phenomenon to occur.
Accompanying drawing explanation
Fig. 1 is existing typical disposable automatic blood-taking needle three-dimensional exploded view;
Fig. 2-7 is existing typical disposable automatic blood-taking needle use procedure exploded view;
Fig. 8 is the embodiment of the present invention 1 three-dimensional exploded view;
Fig. 9 is the embodiment of the present invention 1 upper cover axonometric chart;
Figure 10 is the embodiment of the present invention 1 lower cover axonometric chart;
Figure 11-13 is the partial enlarged drawing of the embodiment of the present invention 1 three kinds of states;
Figure 14-22 is the embodiment of the present invention 1 use procedure exploded view;
Figure 23 is the embodiment of the present invention 2 three-dimensional exploded view;
Figure 24 is the embodiment of the present invention 2 using state sectional view;
Figure 25 is constraint mechanism first sectional view that the embodiment of the present invention 2 prevents secondary puncture;
Figure 26 is constraint mechanism second sectional view that the embodiment of the present invention 2 prevents secondary puncture;
Figure 27 is the constraint mechanism enlarged drawing that the embodiment of the present invention 2 prevents secondary puncture.
Label declaration in above accompanying drawing is as follows:
1. housing; 2. nook closing member; 3. spring; 4. needle body; 5. guard bar; 6. needle outlet; 7. trigger button; 8. upper cover; 9. lower cover; 10. elastic hook; 11. draw-in grooves; 12. first medial surface; 13. second medial surface; 14. first inclined-planes; 15. second inclined-planes; 16. flexure strips; 17. bayonet sockets; 18. sleeve shells; 19. end caps; 20. push away hair device; 21. elastic claws; 22. pick up the ears; 23. grabs; 24. inclined-planes; 25. blood sampling end faces; 26. long feet; 27. gathering sills; 28. guide pads; 29. blocks; 30. test rods.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment 1: a kind of disposable automatic blood-taking needle preventing secondary puncture
As shown in Fig. 8-Figure 13; this blood taking needle forms (see figure 8) by housing 1, nook closing member 2, spring 3 and guard bar 5; wherein, housing 1 is made up of (see Fig. 9 and Figure 10) upper cover 8 and lower cover 9 two parts, and two parts connect into overall structure by hole set on contact surface, latch structure.Housing 1 forms an ejection chamber, and nook closing member 2 and spring 3 are all located in ejection chamber, and nook closing member 2 and ejection chamber are slidably matched on direction of ejection, and spring 3 acts on nook closing member 2 on direction of ejection.Nook closing member 2 is provided with the needle body 4 of band needle point, and needle point is positioned at nook closing member 2 front end, and needle point or nook closing member 2 front end sleeve are provided with a guard bar 5, and guard bar 5 stretches out from the needle outlet 6 of housing 1 front end.Adopt between guard bar 5 with nook closing member 2 and be socketed the thin neck formation maybe can twisted into two parts and removably connect (the present embodiment adopt be that the thin cervical region that can twist into two parts is connected).Housing 1 is provided with trigger button 7, is provided with latching structure between nook closing member 2 sidepiece and housing 1.
In order to solve the repeatedly repeated puncture problem that disposable automatic blood-taking needle in the past exists, the present invention is provided with the constraint mechanism preventing secondary puncture between nook closing member 2 sidepiece and housing 1 ejection chamber inwall, and this constraint mechanism is made up of (see Fig. 8-Figure 10) the elastic hook 10 be located on nook closing member 2 sidepiece and the draw-in groove 11 be located on housing 1 ejection chamber inwall.
Described elastic hook 10 and draw-in groove 11 quantitatively by two to forming, often pair is formed by an elastic hook 10 and draw-in groove 11 corresponding matching, between two pairs of elastic hooks 10 and draw-in groove 11 with the centrage of housing 1 fore-and-aft direction for reference symmetry arrange (see Fig. 8-Figure 13).
Described elastic hook 10 is made up of (see Figure 11-Figure 13) elastic arm and coupler body, and elastic arm extends back nook closing member 2 sidepiece is oblique, coupler body be positioned at the arm end of elastic arm and also hook forward curved.
The cross section of described draw-in groove 11 on housing 1 fore-and-aft direction is Baltimore groove (see Figure 11-Figure 13), the top of this Baltimore groove relative to ejection chamber rear or/and the inwall in front is protruding, Baltimore groove has the first medial surface 12 and the second medial surface 13, first medial surface 12 is by ejection chamber rear, second medial surface 13 is by ejection chamber front, on the groove depth direction of Baltimore groove, the height of the first medial surface 12 is greater than the height of the second medial surface 13, be connected by the first inclined-plane 14 between the top of the first medial surface 12 and the inwall at ejection chamber rear, be connected by the second inclined-plane 15 between the top of the second medial surface 13 and the inwall in ejection chamber front, distance on the groove width direction of Baltimore groove between the first medial surface 12 with the second medial surface 13 is greater than one times of corresponding width of coupler body, is less than the corresponding width of two times of coupler bodies simultaneously.
The present embodiment use procedure is described below:
The first, use front original state
Figure 14 represents this state.As can be seen from Figure 14, in this case, spring 3 is in the nonelastic potential energy of free state, and the coupler body of elastic hook 10 is positioned at draw-in groove 11 rear in ejection chamber.
The second, pushing guard bar makes nook closing member load state
Figure 15 represents this state.As can be seen from Figure 15, according to arrow points pushing guard bar 5, nook closing member 2 is forced to slide backward in ejection chamber.Nook closing member 2 slides backward Compress Spring 3 simultaneously, till flexure strip 16 end be stuck on lower cover 9 of the bayonet socket 17 on nook closing member 2 enters kayser state.In this case, nook closing member 2 loads, and spring 3 is in compression and saves up strength state.
3rd, removal guard bar enters battery
Figure 16 represents this state.Concrete operations are: on the basis of above Figure 15, reverse guard bar 5, force guard bar 5 and nook closing member 2 to rupture at thin cervical region place, then pull out guard bar 5, expose needle body 4 and needle point, finally enter the battery shown in Figure 16.
4th, press trigger button and enter emission state
Figure 17 represents this state.As can be seen from Figure 17, press trigger button 7, trigger button 7 directly presses flexure strip 16 by presser feet, force flexure strip 16 end and bayonet socket 17 to break off relations, now under the promotion of spring 3, nook closing member 2 quick sliding forward, enters emission state.
5th, the first stage of emission state
Figure 18 represents this state.As can be seen from Figure 18, in this case, nook closing member 2 is in quick sliding forward, and the coupler body on elastic hook 10 slides along the first inclined-plane 14 and climbs, and elastic arm is oppressed by the first inclined-plane 14 and bends simultaneously.
6th, the second stage of emission state
Figure 19 represents this state, and Figure 11 is the partial enlarged drawing of this state.As can be seen from Figure 19 and Figure 11, nook closing member 2 is still continuing quick sliding forward, and the draw-in groove 11 that relative first inclined-plane 14 of the coupler body now on elastic hook 10 slides into top is other, and now elastic arm is oppressed by the first inclined-plane 14 and the amount that bends is maximum.
7th, the phase III of emission state
Figure 20 represents this state, and Figure 12 is the partial enlarged drawing of this state.As can be seen from Figure 20 and Figure 12, continue forward in quick sliding process at nook closing member 2, because the height of the first medial surface 12 is greater than the height of the second medial surface 13 on the groove depth direction of draw-in groove 11, and the groove width of draw-in groove 11 is less, and (distance on the groove width direction of Baltimore groove between the first medial surface 12 with the second medial surface 13 is greater than one times of corresponding width of coupler body, be less than the corresponding width of two times of coupler bodies) simultaneously, the elastic arm of elastic hook 10 and coupler body have little time stretching, extension and fall into draw-in groove 11, but directly cross the second medial surface 13 of draw-in groove 11, continue quick sliding forward, till generation first time puncture.
8th, nook closing member retracted state after first time shooting
Figure 21 represents this state, and Figure 13 is the partial enlarged drawing of this state.As can be seen from Figure 21 and Figure 13, under the combined effect of spring 3 and ejection chamber front bulkhead bounce, nook closing member 2 bounces back backward from above-mentioned Figure 20 state.In retraction process, the coupler body of elastic hook 10 slides along the second inclined-plane 15 and climbs, and elastic arm is oppressed by the second inclined-plane 15 and bends simultaneously.Because on the groove depth direction of draw-in groove 11, the height of the first medial surface 12 is greater than the height of the second medial surface 13, coupler body crosses the second medial surface 13, elastic arm stretches, and answers back to the first medial surface 12 simultaneously, final coupler body tackle by the first medial surface 12 and fall into draw-in groove 11.
9th, damped vibration state
Figure 22 represents this state.As can be seen from Figure 22, in this case, elastic hook 10 is hooked by draw-in groove 11 and cannot escape.Now, due to inertia and impact force action, nook closing member 2 does damped vibration (now needle point is away from needle outlet 6) back and forth, until nook closing member 2 stop motion along with the coupler body of elastic hook 10 in this short distance region of draw-in groove 11 width.As can be seen here, the relative housing 1 of needle point on nook closing member 2 of the present invention can not produce secondary puncture.
Embodiment 2: a kind of disposable automatic blood-taking needle preventing secondary puncture
As shown in Figure 23-Figure 27, this blood taking needle by sleeve shell 18, end cap 19, nook closing member 2, spring 3, push away hair device 20 and block 29 forms (see Figure 23), wherein:
End cap 19 covers in sleeve shell 18 port, end cap 19 stretches out a pair elastic claw 21 thus forms elastic clip in sleeve shell 18, nook closing member 2 is clamped between elastic clip, spring 3 acts on the direction of ejection between nook closing member 2 rear portion and end cap 19, nook closing member 2 both sides are provided with picks up the ears 22, elastic clip end utilize grab 23 and chucking power by nook closing member 2 both sides pick up the ears 22 to block, form latching structure (see Figure 24).
Push away hair device 20 slip and be located at (see Figure 24) in sleeve shell 18, push away corresponding two elastic claws 21 of hair device 20 to be head-on provided with and to force its inclined-plane 24 be separated to both sides or conical surface, the hollow space pushing away hair device 20 is ejection chamber, push away hair device 20 front portion from sleeve shell 18, stretch out a blood sampling end face 25, blood sampling end face 25 central authorities are provided with needle outlet 6, push away hair device 20 rear portion and be provided with two long feet 26, gathering sill 27 is respectively equipped with inside long foot 26, the guide pad 28 that gathering sill 27 and nook closing member 2 lateral symmetry are arranged coordinates to be formed shoots guide frame, this guide frame and elastic clip structure are arranged in decussation under the state of overlooking.
It is anterior that block 29 is enclosed within sleeve shell 18, and its central authorities establish a test rod 30, and this test rod 30 front end is provided with a stomidium, and block 29 is under preshot confined state, and test rod 30 inserts needle outlet 6 and stomidium is enclosed within needle point.
In order to solve the repeatedly repeated puncture problem that disposable automatic blood-taking needle in the past exists, the present invention is at nook closing member 2 sidepiece and push away between hair device 20 ejection chamber inwall and be provided with the constraint mechanism preventing secondary puncture, and this constraint mechanism is by the elastic hook 10 be located on nook closing member 2 sidepiece and be located at the draw-in groove 11 pushed away on hair device 20 ejection chamber inwall and form (see Figure 25 and Figure 26).
Described elastic hook 10 and draw-in groove 11 quantitatively by two to forming, often pair is formed by an elastic hook 10 and draw-in groove 11 corresponding matching, between two pairs of elastic hooks 10 and draw-in groove 11 with the centrage of sleeve shell 18 fore-and-aft direction for reference symmetry arrange (see Figure 25 and Figure 26).
Described elastic hook 10 is made up of elastic arm and coupler body, and elastic arm extends back nook closing member 2 sidepiece is oblique, and coupler body is positioned at arm end and the hook curved forward (see Figure 27) of elastic arm.
Described draw-in groove 11 is Baltimore groove (see Figure 27) pushing away the cross section on hair device 20 fore-and-aft direction, the top of this Baltimore groove relative to ejection chamber rear or/and the inwall in front is protruding, Baltimore groove has the first medial surface 12 and the second medial surface 13, first medial surface 12 is by ejection chamber rear, second medial surface 13 is by ejection chamber front, on the groove depth direction of Baltimore groove, the height of the first medial surface 12 is greater than the height of the second medial surface 13, be connected by the first inclined-plane 14 between the top of the first medial surface 12 and the inwall at ejection chamber rear, be connected by the second inclined-plane 15 between the top of the second medial surface 13 and the inwall in ejection chamber front, distance on the groove width direction of Baltimore groove between the first medial surface 12 with the second medial surface 13 is greater than one times of corresponding width of coupler body, is less than the corresponding width of two times of coupler bodies simultaneously.
The present embodiment use procedure is described below: before using, original state as shown in Figure 25, and what two elastic claws 21 on end cap 19 blocked nook closing member 2 by grab picks up the ears 22, and spring 3 is compressed, and nook closing member 2 is in battery.As long as pull out block 29 during use, pinch sleeve shell 18 with finger and the needle outlet 6 pushing away hair device 20 is aimed at the direct pressing of blood sampling site, now push away hair device 20 try hard to recommend outside dynamic under along sliding on sleeve shell 18 inner chamber, two elastic claw 21 ends are pushed open to both sides by inclined-plane 24, so grab with pick up the ears 22 to free, spring 3 promotes nook closing member 2 and shoots downwards along guide frame, and needle point injection needle outlet 6 stabs blood sampling site.Nook closing member 2 guide pad 28 in shooting course is obstructed when gathering sill 27 slides into lower end position, and spring 3 drives again nook closing member 2 to bounce back.
From nook closing member 2 breaks off relations till nook closing member 2 stop motion, the process embodiments 2 occurred during this is identical to the 9th step with the 5th step that use procedure in embodiment 1 describes.Those skilled in the art are on the basis of Figure 27, and the 5th step to the 9th step content that use procedure describes in 1 in conjunction with the embodiments can imagine that embodiment 2 secondary puncture can not occur completely.Therefore no longer repeated description here.
Be explained as follows for performance of the present invention below:
The first, embodiment 1 is that with Chinese patent CN102028480A, name is called " improved safety portable disposable automatic blood-taking needle ", application number be 201010596791.0 application for a patent for invention technical scheme based on improve and obtain.Embodiment 2 is that with Chinese patent CN2619583Y, name is called " self-locking type disposable safe automatic blood-taking needle ", the patent No. be 03221437.5 utility model patent technical scheme based on improve and obtain.This two blood taking needle has typicality in disposable automatic blood-taking needle.Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences done according to spirit of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
The second, the elastic hook 10 described in embodiment 1 and embodiment 2 and draw-in groove 11 quantitatively by two to being arranged symmetrically with formation.But the quantity of elastic hook 10 and draw-in groove 11 is at least one pair of in theory, often pair is formed by an elastic hook and a draw-in groove corresponding matching.In other words, same cross section is arranged a pair, three to or four to all can realizing the present invention and obtaining same or analogous technique effect.Adopting two pairs of elastic hooks 10 and draw-in groove 11, and be arranged symmetrically with and more consider stressed harmony and the reliability of mechanism, is the better implementation of the present invention.Those skilled in the art are easy understand for these contents.
Claims (4)
1. prevent a disposable automatic blood-taking needle for secondary puncture, comprise housing (1), nook closing member (2) and spring (3), wherein:
Housing (1) forms an ejection chamber, and nook closing member (2) and spring (3) are all located in ejection chamber, and nook closing member (2) and ejection chamber are slidably matched on direction of ejection, and spring (3) acts on nook closing member (2) on direction of ejection; Nook closing member (2) is provided with the needle body (4) of band needle point, and needle point is positioned at nook closing member (2) front end; Housing (1) is provided with trigger button (7), is provided with latching structure between nook closing member (2) sidepiece and housing (1);
It is characterized in that: be provided with the constraint mechanism preventing secondary puncture between described nook closing member (2) sidepiece and housing (1) ejection chamber inwall, this constraint mechanism is made up of the elastic hook (10) be located on nook closing member (2) sidepiece and the draw-in groove (11) be located on housing (1) ejection chamber inwall;
Described elastic hook (10) is made up of elastic arm and coupler body, and elastic arm extends back nook closing member (2) sidepiece is oblique, coupler body be positioned at the arm end of elastic arm and also hook forward curved;
The cross section of described draw-in groove (11) on housing (1) fore-and-aft direction is Baltimore groove, the top of this Baltimore groove relative to ejection chamber rear or/and the inwall in front is protruding, Baltimore groove has the first medial surface (12) and the second medial surface (13), first medial surface (12) is by ejection chamber rear, second medial surface (13) is by ejection chamber front, on the groove depth direction of Baltimore groove, the height of the first medial surface (12) is greater than the height of the second medial surface (13), be connected by the first inclined-plane (14) between the top of the first medial surface (12) and the inwall at ejection chamber rear, be connected by the second inclined-plane (15) between the top of the second medial surface (13) and the inwall in ejection chamber front, distance on the groove width direction of Baltimore groove between the first medial surface (12) with the second medial surface (13) is greater than one times of corresponding width of coupler body, is less than the corresponding width of two times of coupler bodies simultaneously.
2. disposable automatic blood-taking needle according to claim 1, it is characterized in that: described elastic hook (10) and draw-in groove (11) quantitatively by two to forming, often pair is formed by an elastic hook (10) and draw-in groove (11) corresponding matching, is reference symmetry layout with the centrage of housing (1) fore-and-aft direction between two pairs of elastic hooks (10) and draw-in groove (11).
3. prevent a disposable automatic blood-taking needle for secondary puncture, comprise sleeve shell (18), end cap (19), nook closing member (2), spring (3) and push away hair device (20), wherein:
End cap (19) covers in sleeve shell (18) port, end cap (19) stretches out a pair elastic claw (21) thus forms elastic clip in sleeve shell (18), nook closing member (2) is clamped between elastic clip, spring (3) acts on the direction of ejection between nook closing member (2) rear portion and end cap (19), elastic clip end utilizes grab (23) and chucking power to be blocked by nook closing member (2), forms latching structure;
Pushing away hair device (20) slip is located in sleeve shell (18), push away corresponding two elastic claws (21) of hair device (20) to be head-on provided with and to force its inclined-plane (24) be separated to both sides or conical surface, the hollow space pushing away hair device (20) is ejection chamber, push away hair device (20) front portion from sleeve shell (18), stretch out a blood sampling end face (25), blood sampling end face (25) central authorities are provided with needle outlet (6);
It is characterized in that: described nook closing member (2) sidepiece and push away between hair device (20) ejection chamber inwall and be provided with the constraint mechanism preventing secondary puncture, this constraint mechanism is by the elastic hook (10) be located on nook closing member (2) sidepiece and be located at the draw-in groove (11) pushed away on hair device (20) ejection chamber inwall and form;
Described elastic hook (10) is made up of elastic arm and coupler body, and elastic arm extends back nook closing member (2) sidepiece is oblique, coupler body be positioned at the arm end of elastic arm and also hook forward curved;
Described draw-in groove (11) is Baltimore groove pushing away the cross section on hair device (20) fore-and-aft direction, the top of this Baltimore groove relative to ejection chamber rear or/and the inwall in front is protruding, Baltimore groove has the first medial surface (12) and the second medial surface (13), first medial surface (12) is by ejection chamber rear, second medial surface (13) is by ejection chamber front, on the groove depth direction of Baltimore groove, the height of the first medial surface (12) is greater than the height of the second medial surface (13), be connected by the first inclined-plane (14) between the top of the first medial surface (12) and the inwall at ejection chamber rear, be connected by the second inclined-plane (15) between the top of the second medial surface (13) and the inwall in ejection chamber front, distance on the groove width direction of Baltimore groove between the first medial surface (12) with the second medial surface (13) is greater than one times of corresponding width of coupler body, is less than the corresponding width of two times of coupler bodies simultaneously.
4. disposable automatic blood-taking needle according to claim 3, it is characterized in that: described elastic hook (10) and draw-in groove (11) quantitatively by two to forming, often pair is formed by an elastic hook (10) and draw-in groove (11) corresponding matching, is reference symmetry layout with the centrage of sleeve shell (18) fore-and-aft direction between two pairs of elastic hooks (10) and draw-in groove (11).
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| CN201410255592.1A CN103989484B (en) | 2014-06-10 | 2014-06-10 | Prevent the disposable automatic blood-taking needle of secondary puncture |
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| CN201410255592.1A CN103989484B (en) | 2014-06-10 | 2014-06-10 | Prevent the disposable automatic blood-taking needle of secondary puncture |
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| CN103989484A CN103989484A (en) | 2014-08-20 |
| CN103989484B true CN103989484B (en) | 2015-10-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105455824A (en) * | 2014-09-09 | 2016-04-06 | 大捷达实业（深圳）有限公司 | Painless vacuum blood collector |
| CN106419934B (en) * | 2016-11-08 | 2023-12-12 | 苏州施莱医疗器械有限公司 | Disposable hemostix for preventing secondary puncture |
| CN106769624B (en) * | 2016-11-30 | 2019-05-28 | 常州大学 | Bituminous coal caking index the resonance method measurement device |
| CN111214246B (en) * | 2019-09-26 | 2022-09-06 | 天津华鸿科技股份有限公司 | Blood taking pen and needle seat for blood taking needle |
| CN113476044B (en) * | 2021-07-02 | 2023-02-24 | 天津云帆医疗器械有限公司 | Safety blood taking needle |
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| CN2737303Y (en) * | 2004-09-15 | 2005-11-02 | 施迎敢 | Needle head withdrawing disposable safety blood sampling needle and disposable emitting safety blood taking pen |
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| CN204091993U (en) * | 2014-06-10 | 2015-01-14 | 苏州施莱医疗器械有限公司 | Prevent the disposable automatic blood-taking needle of secondary puncture |
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| JP2009011704A (en) * | 2007-07-09 | 2009-01-22 | Misawa Ika Kogyo Kk | Lancet |
| WO2011152580A1 (en) * | 2010-06-04 | 2011-12-08 | Shin Youn-Cheol | Device for preventing reuse of lancet |
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| CN2737303Y (en) * | 2004-09-15 | 2005-11-02 | 施迎敢 | Needle head withdrawing disposable safety blood sampling needle and disposable emitting safety blood taking pen |
| CN102028480A (en) * | 2010-12-21 | 2011-04-27 | 苏州施莱医疗器械有限公司 | Improved safe and convenient disposable automatic blood taking needle |
| CN102579057A (en) * | 2011-11-09 | 2012-07-18 | 苏州施莱医疗器械有限公司 | Safety blood lancet |
| CN204091993U (en) * | 2014-06-10 | 2015-01-14 | 苏州施莱医疗器械有限公司 | Prevent the disposable automatic blood-taking needle of secondary puncture |
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