CN101444649B - Low-residual safe self-destructing injector - Google Patents

Low-residual safe self-destructing injector Download PDF

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Publication number
CN101444649B
CN101444649B CN2008101639604A CN200810163960A CN101444649B CN 101444649 B CN101444649 B CN 101444649B CN 2008101639604 A CN2008101639604 A CN 2008101639604A CN 200810163960 A CN200810163960 A CN 200810163960A CN 101444649 B CN101444649 B CN 101444649B
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CN
China
Prior art keywords
syringe
push rod
provided
injection
diameter
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CN2008101639604A
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Chinese (zh)
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CN101444649A (en
Inventor
林作钱
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林作钱
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Priority to CN2008101639604A priority Critical patent/CN101444649B/en
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Publication of CN101444649B publication Critical patent/CN101444649B/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321Means for protection against accidental injuries by used needles
    • A61M5/322Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/323Connection between plunger distal end and needle hub proximal end, e.g. stud protruding from the plunger

Abstract

The invention relates to a low-residual safe self-destructing injector comprising a hollow syringe, a push rod sliding in the syringe and a rubber plug arranged at the front end of the push rod. The front end of the syringe is provided with a needle seat supported by a support base, an elastic claw is arranged at the inner side of the support base, and the front end of the push rod is provided with a frustum clamped with the elastic claw after injection. The injector is characterized in that a cone base of the frustum is contacted and connected with the top of the rubber plug when the injection is not performed; the rubber plug is interiorly hollow; the push rod is provided with a blocking piece for pushing and blocking the rubber plug; during the injection, the rubber plug is compressed and deforms due to counterforce generated by injection liquid and push force of the blocking piece, and at the same moment, the frustum at the front end of the push rod axially extend forward along the push rod; and after the injection, the frustum can be clamped and combined with the elastic claw. After the adoption of the structure, as the cone base of the frustum is contacted and connected with the top of the rubber plug when the injection is not performed and a higher part of the frustum is short, extracted liquid generates no foam at the top of the rubber plug, gas discharge suffers no blockage and is smooth after the liquid extraction, and little residual of injection liquid is left in the syringe after the injection; and the invention is in particular applicable to injectors such as insulin syringes with small dosage.

Description

A kind of low-residual safe self-destructing injector

Technical field

The invention belongs to a kind of medical apparatus, belong to a kind of disposable safety self-destructing syringe particularly.

Background technology

Syringe is that an indispensable apparatus is gone up in medical treatment, for avoiding the blood cross infection, present syringe all adopts disposable product, but this disposable syringe, if inartificial damages, can reuse, cause cross infection in order not make existing disposable syringe be repeated to utilize, spread disease, have many syringes just to arise at the historic moment.Be provided with the shackle member that engages with syringe such as push rod, when the injection rear push-rod that finishes engages with syringe, make push-rod lock in syringe, can not reuse, thereby reach the purpose of self-destruction, but this class syringe is drawing liquid (blood) secondary piston front end (being that piston is not pulled to the end) not on zero line, therefore during drawing liquid (especially in blood drawing) uses, cause drawing liquid (blood) dosage nonstandard on the one hand, make that on the other hand the air in the syringe was residual not more when syringe used, it is more that the push rod head of this class syringe exceeds plug, can produce the difficult discharge of bubble at the plug top when drawing liquid, especially as the syringe of this class low dose of insulin syringe, its bubble is discharged the meeting difficulty, there is injection residual after this class injector to inject finishes in addition, can not reaches the standard of low-residual.

Summary of the invention

The technical problem to be solved in the present invention is: a kind of low-residual safe self-destructing injector is provided, and front end can not produce bubble at the plug top when this syringe rubber plug was shifted the end onto on zero line.

In order to solve the problems of the technologies described above, the present invention by the following technical solutions:

A kind of low-residual safe self-destructing injector, comprise a hollow barrel, one push rod that in syringe, slides, be installed in the plug of push rod front end, the front end of syringe is equipped with needle stand, needle stand is supported by supporting seat, the supporting seat inboard is provided with elastic card claw, the push rod front end is provided with the frustum that engages with elastic card claw after injection finishes, it is characterized in that: when not injecting at the bottom of the awl of described frustum with plug top butt, described plug is a hollow type, push rod is provided with the block of pushing and pressing plug, plug is subjected to the counteracting force that injection produces and the thrust compressive deformation of block during injection, this moment the push rod front end frustum along axially the protracting of push rod, the injection back frustum that finishes can engage with elastic card claw.

After adopting said structure: since when not injecting at the bottom of the awl of push rod frustum with plug top butt, frustum to exceed the position shorter, drawing liquid can not produce bubble at the plug top, without hindrance unimpeded in the drawing liquid final vacuum, the residual quantity of injection is less in the syringe of injection back, especially is fit to the syringe of this class low dose of picture insulin syringe.

In order to solve the problems of the technologies described above, the present invention adopts following further technical scheme:

Described needle stand lower end forms the first elasticity support claw, the syringe inwall is provided with the embeddable draw-in groove of the first elasticity support claw, the outside, described supporting seat upper end compresses the first elasticity support claw inboard, the connector of one band injection through hole is installed in the needle stand, the connector upper end is provided with first step, correspondingly the needle stand inboard is provided with and cooperates spacing second step with first step, the connector lower end forms the spike that stretches in the supporting seat, the inboard of supporting seat is provided with spike and cooperates the inner convex platform that drives the connector downslide, and corresponding spike top is provided with the embeddable groove of inner convex platform.

Because adopt said structure, connector is installed in the needle stand, and the space in the needle stand is filled up, and makes that the air at syringe needle position is still less residual, injection can be injected fully after the injection to finish, and does not have residual.Pull at push rod downwards, supporting seat glides, and supporting seat drives connector and glides, and connector pulling needle stand bounces back in syringe.

In order to solve the problems of the technologies described above, the present invention adopts following further technical scheme:

Described push rod is provided with round platform, round platform is provided with the elastic pawl that extends to syringe inwall oblique angle, the end of syringe is provided with diameter-increasing portion, transition position in non-diameter-increasing portion of syringe and diameter-increasing portion is provided with the sloping platform rank, the groove that elastic pawl can snap in when below, sloping platform rank was provided with down pulling-pushing rod is provided with the back-up ring that can prop up the round platform bottom in the diameter-increasing portion.

Adopt the syringe of said structure, because the end of syringe is provided with diameter-increasing portion, self-locking mechanism can be arranged on back end of syringe, push rod is provided with elastic pawl and extends to the syringe inwall, elastic pawl snaps in groove during following pulling-pushing rod, and sloping platform rank, elastic pawl top stop push rod to move upward, and the bottom that the back-up ring of elastic pawl below props up the push rod round platform stops push rod to move downward, because the effect elastic pawl of groove can not move in radial direction, reaches the purpose of locked push rod.

Description of drawings

Fig. 1 is the cutaway view of push rod installment state;

Fig. 2 installs the cutaway view of state for push rod;

Fig. 3 is the partial enlarged drawing of Fig. 2;

Fig. 4 is the cutaway view of drawing liquid state;

Fig. 5 is for injecting the cutaway view of the state that finishes;

Fig. 6 begins the cutaway view of retracted state for syringe needle;

Fig. 7 is the finish cutaway view of state of self-destruction;

Fig. 8 is the partial enlarged drawing of Fig. 4;

Fig. 9 is the partial enlarged drawing of Fig. 7;

Figure 10 is the cutaway view of plug;

Figure 11 is the cutaway view of supporting seat;

Figure 12 is the cutaway view of connector;

Figure 13 is the structural representation of back-up ring;

Figure 14 is the cutaway view of Figure 13;

Figure 15 is the cutaway view of push rod;

Figure 16 is the cutaway view of syringe;

Figure 17 is the partial enlarged drawing of Figure 16

Figure 18 is the cutaway view of plug shown in the embodiment two;

Figure 19 is the partial enlarged drawing of syringe shown in the embodiment two.

The specific embodiment

Embodiment one:

Referring to Fig. 1, Fig. 2, Fig. 3, the present invention includes the push rod 2 that a hollow barrel 1, slides, the plug 3 that is installed in the push rod front end in syringe, the front end of syringe 1 is equipped with needle stand 4, needle stand 4 is supported by supporting seat 5, supporting seat 5 lower ends and syringe inwall interference fit, supporting seat 5 inboards are provided with elastic card claw 6, and push rod 2 front ends are connected with frustum 8 by the core of the card 7 that passes plug 3, and frustum 8 injections finishing back engages with elastic card claw 6.

When not injecting at the bottom of the awl of push rod 2 front end frustums 8 with plug top 3 butts, plug 3 is hollow type (referring to Figure 10), form cannular boss 9 in plug 3 hollow cavities in the present embodiment, push rod is provided with the block 10 of pushing and pressing plug, block 10 also plays the fixedly effect of plug simultaneously, block 10 is located in the cavity basis and is positioned at the below of cannular boss 9, and block 10 offsets with cannular boss 9 bottoms.Plug is subjected to the counteracting force that injection produces and the thrust compressive deformation of block 10 during injection, this moment the push rod front end frustum 8 along axially the protracting of push rod, the injection back frustum 8 that finishes can engage (referring to Fig. 9) with elastic card claw 6.Needle stand 4 lower ends form the first elasticity support claw 11, the syringe inwall is provided with the first elasticity support claw, 11 embeddable draw-in grooves 12 (referring to Figure 16), the outside, described supporting seat 5 upper ends compresses the first elasticity support claw, 11 inboards, the outside, upper end and the first elasticity support claw, the 11 inboard interference fit of supporting seat 5, a connection piece 13 is installed in the needle stand 4, this connector 13 is provided with the injection through hole that communicates with syringe needle, connector 13 upper ends are provided with first step 14 (referring to Figure 12), correspondingly needle stand 4 inboards are provided with first step 14 and cooperate spacing second step 15, connector 13 lower ends form the spike 16 that stretches in the supporting seat 5, the inboard of supporting seat 5 is provided with to closely cooperate with spike 16 and drives the inner convex platform 17 (referring to Figure 11) that connector 13 glides, and corresponding spike 16 tops are provided with inner convex platform 17 embeddable grooves 18 (referring to Figure 12).

Referring to Fig. 9, Figure 15, Figure 16, the below that is positioned at plug 3 on the push rod 2 is provided with round platform 19, round platform 19 is provided with the elastic pawl 20 that extends to syringe inwall oblique angle, the bottom surface of round platform 19 connects the cylinder 191 less than round platform 19, the end of syringe is provided with diameter-increasing portion 21, transition position in non-diameter-increasing portion 22 of syringe and diameter-increasing portion 21 is provided with sloping platform rank 23, the groove 24 (referring to Figure 17) that elastic pawl 20 can snap in when 23 belows, sloping platform rank were provided with down pulling-pushing rod, be provided with in the diameter-increasing portion 21 can prop up round platform 19 bottoms back-up ring 25 (referring to Fig. 9, Figure 13, Figure 14), back-up ring 25 upper ends are provided with the second elasticity support claw 26 of propped up round platform (19) bottom of gathering to the center.The width of elastic pawl 20 is greater than the spacing 261 of arranging of back-up ring support claw.The external diameter of round platform 19 is positioned at the minimum diameter at the second elasticity support claw, 26 pawls point place smaller or equal to the minimum diameter on syringe sloping platform rank 23 greater than back-up ring 25.At least two of quantity of elastic pawl 20 and being symmetrical arranged, be preferably four and be to be symmetrical arranged, distance between the symmetric two pawl points is less than the internal diameter of the non-diameter-increasing portion 22 of syringe, greater than the minimum diameter on sloping platform rank 23 in the syringe, the ratchet point of elastic pawl 20 rises on the extreme direction oblique angle before syringe.

Referring to Figure 17, groove 24 is circle draw-in grooves along the circumferential direction, and its upper surface 91 is from inside to outside and along oblique angle or plane that elastic pawl 20 cephalad direction are extended, and its sidewall 92 place's diameters are greater than the distance between the symmetrical elastic pawl 20 pawl points.

Referring to Fig. 8, Fig. 9, back-up ring 25 is joined with syringe end diameter augmenting portion 21 inwalls are moving, can move up and down vertically, and do not deviate from syringe, its distance that moves adds the distance of top cylinder sloping platform rank 23 length to round platform 19 bottoms greater than the tip of the elastic pawl on the push rod 2 20, back-up ring 25 upper ends are positioned at the external diameter of the internal diameter at the second elasticity support claw, 26 pawls point place greater than push rod cylinder 191, and back-up ring 25 upper ends can prop up round platform 19 bottoms.The inner ring of back-up ring 25 is provided with inclined-plane 27 (Figure 14), and elastic pawl 20 can be along moving on the inclined-plane 27 and inwardly drawing in when push rod was installed, and round platform 19 can be entered the big extruding of the second elasticity support claw, 26 supports of back-up ring 25.The inwall of syringe end diameter augmenting portion 21 is provided with and back-up ring 25 moving circle big grooves 61 (Figure 16, Figure 17) of joining, on it top 62 can with back-up ring 25 upper ends 121 butts, be provided with flange step 28 (referring to Figure 16) in big groove 61 lower ends, the outer ring of back-up ring 25 upper ends is provided with flange 29 (referring to Figure 14), bottom face 122 butts of flange step 28 and flange 29, step 28 stop the slippage in the syringe of these back-up rings 25.

Referring to Fig. 7, Fig. 9, after injection finishes, pulling push rod 2 moves to the syringe bottom direction, the top of the second elasticity support claw 26 of the back-up ring 25 that is installed in syringe 1 inside will be run in the baseplane of the round platform 19 on the push rod 2, therefore the internal diameter of locating is less than the external diameter of round platform 19, external diameter greater than push rod cylinder 191, thereby driving back-up ring 25 moves downward, pull on push rod 2 downwards, elastic pawl 20 contacts with sloping platform rank 23 upper inclined surface 81 (referring to Figure 17), and under these inclined-plane 81 effects, central part direction to push rod produces strain, and moving down and cross the minimum place of internal diameter on sloping platform rank 23 with push rod, elastic pawl 20 is after crossing the minimum place of sloping platform rank 23 internal diameters, by self elastic return to former naturalness, the pawl point of elastic pawl 20 will snap in the groove 24 of 23 belows, sloping platform rank, when push rod 2 continues down to move, the bottom face 122 of back-up ring 25 upper end flange 29 and syringe end diameter increase inwall flange step 28 butts of part 21, stop push rod to move downward, if certain external force is arranged when injection direction promotes push rod, because elastic pawl 20 plays interception under the effect of groove 24, the sidewall 92 of groove 24 can prevent the direction upset of elastic pawl to needle cylinder wall, reaches the purpose of locked push rod.

The present invention in use, at first, as shown in Figure 1, this is installed in the syringe internal state for push rod 2, elastic pawl 20 on the push rod 2 moves up along the inclined-plane 27 of back-up ring 25, and back-up ring 25 is along moving on the syringe inwall simultaneously, and elastic pawl 20 inwardly draws under the extruding of the second elasticity support claw 26 of back-up ring; As shown in Figure 2, elastic pawl 20 enters the non-diameter-increasing portion 22 of syringe by sloping platform rank 23 smoothly under the effect of back-up ring 25, round platform 19 also enters the non-diameter-increasing portion 22 of syringe to the big extruding of second support claw, 26 supports of back-up ring 25, and as shown in Figure 4, this is the drawing liquid state; As shown in Figure 5, this moment, injection finished; Because of the inertia of thrust continues to push against forward push rod 2 at this moment, block 10 protracted the frustum 8 of push rod front end and engaged with elastic card claw 6 along the axial compression cannular boss 9 of push rod this moment; As shown in Figure 6, pull at push rod downwards, supporting seat 5 glides, the first elasticity support claw 11 on the needle stand is broken away from the syringe inwall, supporting seat 5 drive connectors, 13 downslides this moment also cooperate spacing by first step 14 with second step 15, connector 13 pulling needle stands bounce back in syringe, needle holder 4 breaks away from syringe, as shown in Figure 7, pull down push rod, drive needle holder 4 retractions, elastic pawl 20 is 23 downslides along the sloping platform rank, this moment, elastic pawl 20 snapped in the groove 24 of 23 belows, sloping platform rank, and push rod 2 is by locked, and self-destruction is finished.

Embodiment two:

Syringe shown in the present embodiment is except that the structure of plug and example one are inequality, and the structure of remainder is all identical.

Referring to Figure 18, Figure 19, plug 3 ' in the present embodiment also is a hollow type, difference is: the plug bottom forms a circle flange 9 ', block 10 is positioned at flange 9 ' below, and offset with flange 9 ', the core of the card 7 of push rod is provided with hollow cavity and the close flange 9 ' that second block, 10 ', the second block 10 ' is positioned at plug 3 '.Leave big space between this plug 3 ' inwall and the core of the card 7, the wall that is plug 3 ' is thinner relatively, plug is subjected to the counteracting force of injection generation and the thrust compressive deformation of block 10 during injection, because the effect of second block 10 ', the plug that only is positioned at second block, 10 ' upper section is to inner recess, the fixedly effect of plug when second block 10 ' also plays drawing liquid simultaneously, also because of the inertia of thrust, this moment the push rod front end frustum 8 along axially the protracting of push rod, the injection back frustum 8 that finishes can engage with elastic card claw 6.

Claims (12)

1. low-residual safe self-destructing injector, comprise a hollow barrel (1), one push rod (2) that in syringe (1), slides, be installed in the plug (3) of push rod (2) front end, the front end of syringe (1) is equipped with needle stand (4), needle stand is supported by supporting seat (5), supporting seat (5) inboard is provided with elastic card claw (6), the push rod front end is provided with the frustum (8) that engages with elastic card claw (6) after injection finishes, it is characterized in that: when not injecting at the bottom of the awl of described frustum (8) with plug top butt, described plug is a hollow type, push rod is provided with the block (10) of pushing and pressing plug, plug is subjected to the counteracting force of injection generation and the thrust compressive deformation of block (10) during injection, this moment the push rod front end frustum (8) along axially the protracting of push rod, the injection back frustum (8) that finishes can engage with elastic card claw (6); Described needle stand lower end forms the first elasticity support claw (11), the syringe inwall is provided with the first embeddable draw-in groove of elasticity support claw (11) (12), the outside, described supporting seat (5) upper end compresses first elasticity support claw (11) inboard, the connector (13) of one band injection through hole is installed in the needle stand, connector (13) upper end is provided with first step (14), correspondingly the needle stand inboard is provided with first step (14) and cooperates spacing second step (15), connector (13) lower end forms the spike (16) that stretches in the supporting seat (5), the inboard of supporting seat (5) is provided with spike (16) and cooperates the inner convex platform (17) that drives connector (13) downslide, and corresponding spike (16) top is provided with the embeddable groove of inner convex platform (17) (18).
2. a kind of low-residual safe self-destructing injector as claimed in claim 1, it is characterized in that: form cannular boss (9) in the hollow cavity of described plug, block (10) is located in the hollow cavity and is positioned at the below of cannular boss (9), and block (10) offsets with cannular boss (9) bottom.
3. a kind of low-residual safe self-destructing injector as claimed in claim 1, it is characterized in that: described plug bottom forms a circle flange (9 '), described block (10) is positioned at flange (9 ') below, and offset with flange (9 '), the core of the card of described push rod (7) is provided with second block (10 '), and second block (10 ') is positioned at the hollow cavity and the close flange (9 ') of plug.
4. as claim 1 or 2 or 3 described a kind of low-residual safe self-destructing injectors, it is characterized in that: described push rod (2) is provided with round platform (19), round platform (19) is provided with the elastic pawl (20) that extends to syringe inwall oblique angle, the end of syringe is provided with diameter-increasing portion (21), transition position in non-diameter-increasing portion of syringe (22) and diameter-increasing portion (21) is provided with sloping platform rank (23), the groove (24) that elastic pawl (20) can snap in when below, sloping platform rank (23) was provided with down pulling-pushing rod is provided with the back-up ring (25) that can prop up round platform (19) bottom in the diameter-increasing portion (21).
5. a kind of low-residual safe self-destructing injector as claimed in claim 4, it is characterized in that: described back-up ring (25) is joined with syringe end diameter augmenting portion (21) inwall is moving, can be along axially the moving up and down and do not deviate from syringe of push rod, back-up ring (25) upper end is provided with the second elasticity support claw (26) of propped up round platform (19) bottom of gathering to the center.
6. a kind of low-residual safe self-destructing injector as claimed in claim 5, it is characterized in that: the internal diameter that described back-up ring (25) upper end is positioned at second elasticity support claw pawl point place is slightly less than the internal diameter that syringe sloping platform rank (23) are located, the inner ring of back-up ring (25) is provided with inclined-plane (27), elastic pawl (20) can be along moving on inclined-plane (27) and inwardly drawing in when push rod was installed, and round platform (19) can be entered the big extruding of the second elasticity support claw (26) of back-up ring (25) support.
7. a kind of low-residual safe self-destructing injector as claimed in claim 4, it is characterized in that: the inwall of described syringe end diameter augmenting portion (21) is provided with and the moving circle big groove (61) of joining of back-up ring (25), top on it (62) can with back-up ring (25) upper end (121) butt, be provided with flange step (28) in big groove (61) lower end, the outer ring of back-up ring (25) upper end is provided with flange (29), bottom face (122) butt of flange step (28) and flange (29).
8. a kind of low-residual safe self-destructing injector as claimed in claim 5, it is characterized in that: the minimum diameter that the external diameter of the round platform (19) of described push rod (2) is located smaller or equal to syringe sloping platform rank (23), greater than back-up ring (25) be positioned at second elasticity support claw pawl point place minimum diameter.
9. a kind of low-residual safe self-destructing injector as claimed in claim 4, it is characterized in that: at least two of the quantity of described elastic pawl (20) and being symmetrical arranged, distance between the symmetric two pawl points is less than the internal diameter of the non-diameter-increasing portion of syringe (22), the minimum diameter of locating greater than sloping platform rank (23) in the syringe.
10. a kind of low-residual safe self-destructing injector as claimed in claim 4 is characterized in that: the ratchet point of described elastic pawl (20) rises on the extreme direction oblique angle before syringe.
11. a kind of low-residual safe self-destructing injector as claimed in claim 4 is characterized in that: the quantity of described elastic pawl (20) is four and is to be symmetrical arranged.
12. a kind of low-residual safe self-destructing injector as claimed in claim 4, it is characterized in that: described groove (24) is a circle draw-in groove, its upper surface (91) is from inside to outside and along oblique angle or plane that the elastic pawl cephalad direction is extended, and its sidewall (92) is located diameter greater than the distance between the symmetrical two ratchet points.
CN2008101639604A 2008-12-30 2008-12-30 Low-residual safe self-destructing injector CN101444649B (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN2008101639604A CN101444649B (en) 2008-12-30 2008-12-30 Low-residual safe self-destructing injector
PCT/CN2009/074842 WO2010081346A1 (en) 2008-12-30 2009-11-06 Low residue safety self-destroying syringe

Publications (2)

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CN101444649A CN101444649A (en) 2009-06-03
CN101444649B true CN101444649B (en) 2011-01-12

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