CN104056330A - Protective device of injection needle device - Google Patents
Protective device of injection needle device Download PDFInfo
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- CN104056330A CN104056330A CN201310092784.0A CN201310092784A CN104056330A CN 104056330 A CN104056330 A CN 104056330A CN 201310092784 A CN201310092784 A CN 201310092784A CN 104056330 A CN104056330 A CN 104056330A
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- needle
- preventer
- moving casing
- needle stand
- anchor ring
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Abstract
A protective device of an injection needle device comprises a needle seat, a cannula group, a movable cannula, an elastic component and a stop piece, wherein the needle seat is connected with one injection needle device, and a needle body penetrates through the needle seat; the cannula group is connected with the needle seat; the movable cannula is arranged in the cannula group in a displaceable and penetrating manner; the elastic component is arranged in the cannula group in a penetrating manner and acts on the movable cannula; the stop piece limits the movable cannula to be only able to displace in the cannula group. During injection, the movable cannula can displace in the direction opposite to the needle seat by the aid of the elastic force of the elastic component after being separated from the stop piece, and after two clamping stop surfaces of the movable cannula are stopped by two stepped surfaces of the cannula group respectively, the movable cannula covers the needle body completely and cannot move in the axis direction. Thus, by the aid of special position relations between the stepped surface and the clamping stop surfaces and between the stepped surface and the stop pieces, after injection is finished, the needle body is hidden automatically, assemblies and structures can be simplified, and the smoothness, the safety and the practicability of medical clinical injection operations can also be improved.
Description
Technical field
The present invention relates to a kind of entry needle device, particularly relate to a kind of preventer of the entry needle device that can hide needle body.
Background technology
Consult Fig. 1, Fig. 2, taking the entry needle device 1 of No. 8162883 case of United States Patent (USP) as example, include a pipe fitting 10, a push rod group 11 of closing with the airtight cunning of this pipe fitting 10, be nested with a needle stand 12 at 10 1 front ends of this pipe fitting, a needle body 13 that links with this needle stand 12 and extend along an axis X direction, link with this needle stand 12 and around an isolated tube 14 of this needle body 13, link with this needle stand 12 and around an inner tube 15 and an outer tube 16 of this isolated tube 14, be set in a flexible member 17 between this isolated tube 14 and this inner tube 15, a sleeve pipe 18, an and stop part 19.This inner tube 15 has the path section 151 inside contracting.This outer tube 16 has and this path section 151 one of spacing ring edge 161 of being separated by.This sleeve pipe 18 has oppositely and towards first stopping surface 181 of this path section 151, and towards second stopping surface 182 of this ring edge 161.This stop part 19 have with this first stopping surface 181 mutually against an end face 191, and be formed between two inclined-planes 192,193 and with the sliding recess 194 closing of this path section 151.
This entry needle device 1 does not carry out before injecting program, this flexible member 17 can be moved to the ring edge 161 that is hampered by this outer tube 16 with this second stopping surface 182 by this sleeve pipe 18 of pushing and withstanding, and this inner tube 15 can fasten the recess 194 at this stop part 19 with path section 151, make this stop part 19 obtain location, and limit the first stopping surface 181 of this sleeve pipe 18 with this end face 191, whereby, make this sleeve pipe 18 obtain location.
In the time that this entry needle device 1 carries out injecting program, this sleeve pipe 18 can enter to squeeze this stop part 19 because of counteracting force when contact patient, make this stop part 19 expand bore and allow the first stopping surface 181 of this sleeve pipe 18 to pass through with this this path section 151 of inclined-plane 193 pushing and withstanding, whereby, this sleeve pipe 18 can coordinate this needle body 13 to puncture into patient and go deep into this inner tube 15.When injection completes and this needle body 13 is extracted out after patient, these these sleeve pipes 18 courts of flexible member 17 meeting pushing and withstanding are away from these needle stand 12 direction displacements, be limited to respectively this path section 151 and ring edge 161 to this first stopping surface 181 and this second stopping surface 182, this sleeve pipe 18 can because lose this stop part 19 guide function and cannot displacement, and coated this needle body 13.
But, although previous constructions can reach the object of isolating afterwards this needle body 13 in use, but four pipe fittings such as isolated tube 14, inner tube 15, outer tube 16, sleeve pipe 18 have been used, not only member is many, cost is high, and must hold this stop part 19 between this inner tube 15 and this isolated tube 14, and be preset with the flow space of this path section 151, and there is spacing excessive, this sleeve pipe 18 such as easily rocks at the shortcoming.Moreover, if the elastoplasticity of aforementioned path section 151 is excessive, can hinders this sleeve pipe 18 and shrink, if elastoplasticity is too small, cannot effectively stop this sleeve pipe 18, and still have the situation of exposed this needle body 13, and aspect safety, still be useful on the space of lifting.
Summary of the invention
The object of the invention is is providing the one can simplified assembly and structure, and can lifting operation smoothness and the preventer of the entry needle device of practicality.
This entry needle utensil has a pipe fitting, and is communicated with a needle body of this pipe fitting along an axis direction, and preventer of the present invention comprises a needle stand, a sleeve pipe group, a moving casing, a flexible member, and a stop part.This needle stand and this pipe fitting link and pass for this needle body.This sleeve pipe group and this needle stand link, and have around this axis and define first anchor ring and second anchor ring of an annular groove, and are respectively formed at this first anchor ring and this second anchor ring and two reverse terraces.This moving casing is set in this annular groove, and has a locking surface that is respectively formed at an inner surface, with another locking surface that is formed on an outer surface.This flexible member is set in this annular groove and acts on this moving casing.This stop part is set between the annular groove of this first anchor ring and this second anchor ring along vertical this axis direction, make this moving casing be fastened in this stop part, and can be in the time of an external force pressure, follow this annular groove towards this needle stand direction displacement, and push this stop part and depart from this annular groove, make this moving casing be subject to the elastic acting force of this flexible member, towards the direction displacement that is in reverse to this needle stand, to aforementioned locking surface respectively with aforementioned terrace mutually against rear completely coated this needle body, and be hampered by aforementioned terrace and cannot move along this axis direction.
The preventer of entry needle device of the present invention, this sleeve pipe group has around this axis and defines an inner sleeve and a trocar sheath of this annular groove, and this first anchor ring and this second anchor ring are respectively formed at outer surface of this inner sleeve and inner surface of this trocar sheath.
The preventer of entry needle device of the present invention, this moving casing also has two the first recesses that utilize the variation of anchor ring potential difference to be formed on this inner surface, and aforementioned the first concave portion be you can well imagine for this stop part, accommodation space of this inner sleeve terrace.
The preventer of entry needle device of the present invention, this moving casing also has second recess that utilizes the variation of anchor ring potential difference to be formed on this outer surface, and this second recess provides this trocar sheath terrace an accommodation space.
The preventer of entry needle device of the present invention, it is the high and low potential difference of utilizing curved surface to have that aforementioned anchor ring potential difference changes, and forms this first recess and this second recess.
The preventer of entry needle device of the present invention, this inner sleeve has of running through along vertical this axis direction and wears mouth, and be formed on an inner surface and have a plane ora terminalis to be emerging in a rib partly wearing mouth along this axis direction, this stop part is set in this along vertical this axis direction and wears in mouth and mount the plane ora terminalis at this rib, be subject to the elastic acting force of this flexible member and the mutual block of locking surface of this moving casing inner surface, and stably fix this moving casing.
The preventer of entry needle device of the present invention, this moving casing also has the protuberance being relatively formed between aforementioned the first recess, and this stop part has an inclined-plane that is formed on one end, and in abutting connection with the restriction face on this inclined-plane, this inclined-plane by away from this needle stand and near one end of this axis towards contiguous this needle stand and extend away from the other end of this axis, make this stop part go deep into the process of this annular groove with this moving casing, pushed by the protuberance of this moving casing, and be shifted into the mouth of wearing of this inner sleeve, and depart from this annular groove, to being hampered by this rib, this restriction face is faced mutually with the locking surface of this moving casing inner surface.
The preventer of entry needle device of the present invention, this preventer also includes a upper shield, this upper shield and the socket of this trocar sheath, and seal this moving casing and this needle body.
The preventer of entry needle device of the present invention, one of them also has the several profile grooves that extended along this axis direction by the one end away from this needle stand this inner sleeve and this trocar sheath.
The preventer of entry needle device of the present invention, this needle body directly with this needle stand link, and this needle stand and this pipe fitting sleeving.
The preventer of entry needle device of the present invention, this needle body directly with this pipe fitting link, and this needle stand and this pipe fitting sleeving.
The preventer of entry needle device of the present invention, this needle stand has the several involutory portion that is formed on an outer surface, and this sleeve pipe group also has the several holding sections that are formed on inner surface of this inner sleeve, this trocar sheath second anchor ring both one of them, aforementioned holding section engages mutually with the involutory portion of this needle stand, make this needle stand turn relatively of this sleeve pipe group, aforementioned involutory portion can be chase, fin, and these a combination, it can be fin, chase that aforementioned holding section coordinates this involutory portion, and these a combination.
The preventer of entry needle device of the present invention, this needle stand also has and is formed on a bulge loop of this leading section, a stop ring of a contiguous rearward end, and contiguous middle part and be formed on this bulge loop with this stop ring between one encircle edge, and this inner sleeve also has the scrobicular ring that relatively this bulge loop is formed on this inner surface and engages with this bulge loop, this trocar sheath also have be formed on against one end of this stop ring and with an overhead kick of this ring edge hook.
Beneficial effect of the present invention is: utilize aforementioned terrace and locking surface, and special position relationship between stop part, make the present invention after injection completes, automatically hide this needle body, not only can simplified assembly and structure, and can promote smoothness, safety and the practicality of medical clinical injection operation.
Brief description of the drawings
Fig. 1 is the cutaway view of No. 8162883 case of explanation United States Patent (USP);
Fig. 2 is the cutaway view that in explanation aforesaid U.S. Patent No. 8162883 case, a sleeve pipe cannot displacement;
Fig. 3 is the sectional exploded view of one first preferred embodiment of explanation the present invention's one preventer and an entry needle device;
Fig. 4 is a three-dimensional exploded view of this first preferred embodiment;
Fig. 5 is a three-dimensional cutaway view of this first preferred embodiment;
Fig. 6 is the cutaway view of the state before this first preferred embodiment injecting program of explanation;
Fig. 7 is a part of enlarged drawing of Fig. 6;
Fig. 8 is the cutaway view that the state of injecting program is carried out in this first preferred embodiment of explanation;
Fig. 9 is the cutaway view of the state after this first preferred embodiment injecting program of explanation;
Figure 10 is a part of enlarged drawing of Fig. 9;
Figure 11 is the cutaway view of one second preferred embodiment of explanation the present invention's one preventer and an entry needle device;
Figure 12 is the cutaway view of the state after this second preferred embodiment injecting program of explanation;
Figure 13 is the cutaway view of one the 3rd preferred embodiment of explanation the present invention's one preventer and an entry needle device;
Figure 14 is the cutaway view that the state of injecting program is carried out in explanation the 3rd preferred embodiment;
Figure 15 is the cutaway view of the state after explanation the 3rd preferred embodiment injecting program;
Figure 16 is the sectional exploded view of one the 4th preferred embodiment of explanation the present invention's one preventer and an entry needle device;
Figure 17 is a cutaway view of the 4th preferred embodiment;
Figure 18 is the sectional exploded view of one the 5th preferred embodiment of explanation the present invention's one preventer and an entry needle device; And
Figure 19 is a cutaway view of the 5th preferred embodiment.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail:
Consult Fig. 3, Fig. 4, and Fig. 5, Fig. 6, first preferred embodiment of preventer of the present invention is arranged on an entry needle device 2.This entry needle device 2 has a pipe fitting 20, closes and for pushing a push rod group 21 of medicinal liquid with the airtight cunning of this pipe fitting 20, and a needle body 23 that extends and be communicated with this pipe fitting 20 along an axis X direction.This preventer comprises a needle stand 22, sleeve pipe group 3, moving casing 4, flexible member 5, stop part 6, an end cap 7, and a upper shield 8.
This needle stand 22 links at this preferred embodiment and this needle body 23, and what can unload is socketed with this pipe fitting 20, and there is a ring edge 220 that is formed on an outer surface and contiguous middle part, be formed on the several involutory portion 221 of a leading section and this ring edge 220, 222, outstanding this outer surface and be positioned at this ring edge 220 and the involutory portion 221 of leading section between several bridge formations 223, be formed between this ring edge 220 and a rearward end and diameter is greater than a stop ring 224 of this ring edge 220, be formed on a terrace 225 between this leading section and this bridge formation 223, and be formed on a bulge loop 226 of this leading section.Aforementioned involutory portion 221,222 can be chase or fin, or as shown in this preferred embodiment, comprises chase and fin simultaneously.
This sleeve pipe group 3 can unload with these needle stand 22 fits, and there is an inner sleeve 31 and the trocar sheath 32 around this axis X.
This inner sleeve 31 is bonded to one end against this terrace 225 with these needle stand 22 covers, and have by the one end away from this needle stand 22 along this axis X direction extension and mutual two corresponding profile grooves 311, be formed on first anchor ring 312 of an outer surface, be formed on this first anchor ring 312 and a terrace 313 towards this needle stand 22, along vertical this axis X direction run through and be positioned at 311 of aforementioned profile grooves at least one wear mouthfuls 314, be formed on an inner surface and have a plane ora terminalis 318 to be emerging in part along this axis X direction and wear at least one rib 315 in mouth 314, several holding sections 316 that relatively aforementioned involutory portion 221 is formed on this inner surface and mutually engages with this involutory portion 221 respectively, and the scrobicular ring 317 that this bulge loop 226 is formed on this inner surface and engages with this bulge loop 226 relatively.It can be fin or chase that aforementioned holding section 316 coordinates aforementioned involutory portion 221, makes these needle stand 22 turns relatively of this inner sleeve 31.This rib 315 can be that wherein at least one holding section 316 extension forms.
This trocar sheath 32 and these needle stand 22 fits, and have be formed on against one end of this stop ring 224 and with an overhead kick 320 of these ring edge 220 hooks, two profile grooves 321 by the one end away from this needle stand 22 along this axis X direction extension and relatively aforementioned profile groove 311, be formed on an inner surface and define second anchor ring 322 of an annular groove 30 with this first anchor ring 312, be formed on this second anchor ring 322 and a terrace 323 of this needle stand 22 dorsad, and relatively aforementioned involutory portion 222 several holding sections 324 of being formed on an inner surface and mutually engaging with this involutory portion 222 respectively.It can be fin or chase that aforementioned holding section 324 coordinates aforementioned involutory portion 222, makes these needle stand 22 turns relatively of this trocar sheath 32.
What this moving casing 4 was movable is set in this annular groove 30, and have be oppositely formed on an inner surface be formed on an outer surface and respectively towards two locking surfaces 41,42 of aforementioned terrace 313,323, be formed on this inner surface and utilize Surface forming there is a protuberance 43 that high and low anchor ring potential difference changes and be positioned at two first recesses 44,45 of these protuberance 43 both sides, and be formed on this outer surface and utilize equally Surface forming to there is second recess 46 that high and low anchor ring potential difference changes.Aforementioned the first recess 44,45 provides respectively 313 1 accommodation spaces of terrace of this stop part 6, this inner sleeve 31.This second recess 46 provides 323 1 accommodation spaces of terrace of this trocar sheath 32.
This flexible member 5 is set in this annular groove 30 and part is set on the bridge formation 223 of this needle stand 22, and acts on this moving casing 4.
This stop part 6 has an inclined-plane 61 that is formed on one end, and in abutting connection with this inclined-plane 61 and can be contained in a restriction face 62 between the first recess 44.This inclined-plane 61 by away from this needle stand 22 and near one end of this axis X towards contiguous this needle stand 22 and extend away from the other end of this axis X.It is worth mentioning that, when assembling, this stop part 6 is set in this along vertical this axis X direction by this gap of wearing mouth 314 and this rib 315 and wears in mouth 314 and mount on the plane ora terminalis 318 of this rib 315, or protrude into this annular groove 30 and mutually fasten with this locking surface 41 with this restriction face 62, and be subject to the elastic acting force of this flexible member 5, the mutual block of locking surface 41 with this moving casing 4, and be stable at a primary importance that fixes this moving casing 4 (as Fig. 6, Fig. 7), in addition, this stop part 6 also can go deep into this moving casing 4 process of this annular groove 30, pushed by the protuberance 43 of this moving casing 4, and wear mouthfuls 314 and be moved to and be hampered by this rib 315 along this, make this restriction face 62 depart from this annular groove 30, and be stable at a second position that departs from this moving casing 4 (as Fig. 9, Figure 10).
These end cap 7 these moving casings 4 of sealing are in reverse to one end of this needle stand 22, and have a perforation 71 that runs through and pass for this needle body 23 along this axis X direction.
This upper shield 8 is in reverse to one end socket of this needle stand 22 with these sleeve pipe group 3 trocar sheaths 32, and seals this moving casing 4 and this needle body 23.
When assembling, only need first overlap should inner sleeve 31 and this needle stand 22, this inner sleeve 31 is fixed with this scrobicular ring 317 and the bulge loop 226 of this needle stand 22, again this stop part 6 is placed to wearing in mouth 314 of this inner sleeve 31, then, cover is should trocar sheath 32 and this needle stand 22, make the ring edge 220 of this trocar sheath 32 with these overhead kick 320 these needle stands of hook, now, the inner sleeve 31 being combined as a whole with this needle stand 22 can form with trocar sheath 32 annular groove 30 placing for this flexible member 5, again this flexible member 5 and this moving casing 4 are placed into aforementioned annular groove 30, make this moving casing 4 utilize this inner sleeve 31 profile grooves 311, the elastoplasticity that these trocar sheath 32 profile grooves 321 form, follow smoothly this annular groove 30 to move towards these needle stand 22 directions, this flexible member 5 pushed simultaneously and store the elastic acting force of this flexible member 5, to this locking surface 41 by after this stop part 6, utilize tool (not shown) to place into this inner sleeve 31 this stop part 6 of pushing and withstanding towards away from this axis X direction displacement, this moving casing 4 just can not have under External Force Acting, by these flexible member 5 pushing and withstanding and towards the direction displacement that is in reverse to this needle stand 22, be hampered by this locking surface 41 after the restriction face 62 of this stop part 6, obtain location, now, this stop part 6 can indirectly bear the elastic acting force pushing and withstanding of this flexible member 5, and with the mutual block of locking surface 41 of this moving casing 4, and this moving casing 4 of stable fixing, what deserves to be explained is, this needle body 23 can fix after this moving casing 4 at aforementioned stop part 6, pass this inner sleeve 31 and link with this needle stand 22 along this axis X, or at cover should before inner sleeve 31 and this needle stand 22, link in advance this needle body 23 and this needle stand 22, finally, with these end cap 7 these moving casings 4 of sealing, cover is should upper shield 8 and this trocar sheath 32 again, complete assembling.
Consult Fig. 6, Fig. 7, it is worth mentioning that, because the first recess 44,45 of this moving casing 4 and this second recess 46 can form respectively for the inclined-plane 61 of this stop part 6, the terrace 313 of this inner sleeve 31, the accommodating space of terrace 323 of this trocar sheath 32, therefore, resistance can reduce this moving casing 4 displacement time, smoothness when lifting mobile.
Consult Fig. 6, Fig. 7, Fig. 8, this entry needle device 2 does not carry out before injecting program, this moving casing 4 can be because be fixed by the stop part 6 of this primary importance, and cannot be towards the direction displacement away from this needle stand 22, whereby, only need puncture into the exposed needle body 23 outside this moving casing 4 of part patient's body surface, just can go deep into gradually in the process in patient body at this needle body 23, utilize aforementioned injection external force, make this moving casing 4 be subject to the counteracting force of keeping out under the pressure of patient body-surface, and compress this flexible member 5 and towards these needle stand 22 direction displacements, go deep into gradually this annular groove 30, the curved surface being formed with this protuberance 43 follows the inclined-plane 61 of this stop part 6 to slide smoothly simultaneously, and push this stop part 6 and wear mouthful 314 radial displacements to departing from this annular groove 30 along this, and be placed on the plane ora terminalis 318 of this rib 315, and make puncture injection depth balance intensity of force outside aforementioned injection of this needle body 23, or be positioned the length of these needle body 23 maximum preset.
Consult Fig. 9, Figure 10, when aforementioned injecting program completes, and this needle body 23 is pulled out in the process of patient body-surface gradually, this moving casing 4 can be subject to the elastic acting force pushing and withstanding of this compressed flexible member 5, automatically follow this annular groove 30 towards the direction displacement away from this needle stand 22, to locking surface 41 jams of this moving casing 4 in the terrace 313 of this inner sleeve 31, and another locking surface 42 be able to be faced mutually with this terrace 323.Whereby, this moving casing 4 can be because aforementioned reverse locking surface 41,42 be hampered by respectively this interior pipe box 31 terrace 313,323 reverse with this trocar sheath 32, and cannot move and completely coated this needle body 23 along this axis X direction, reach the object of this needle body 23 of isolation after this entry needle device 2 uses.It is worth mentioning that, the displacement of this moving casing 4 provides this elastoplasticity for 311,321 of profile grooves borrowing inner sleeve 31, trocar sheath 32, and reduces the resistance of displacement, and the displacement action of this moving casing 4 can smooth and easyly be completed.
Consulting Figure 11, Figure 12, is second preferred embodiment of the present invention, and itself and this first preferred embodiment is roughly the same, difference be in:
This needle body 23 is hidden in completely in this moving casing 4 before injection.Whereby, can reduce the fear of patient to needle body 23, and this moving casing 4 equally can be in injection process, go deep into gradually this annular groove 30 along this axis X direction, and appear gradually this needle body 23, and after injecting program completes, as shown in figure 12, borrow this flexible member 5 to push this moving casing 4 to being positioned at completely coated this needle body 23, and the state that cannot move along this axis X direction, and then reach the object that uses rear this needle body 23 of isolation.
Consult Figure 13, Figure 14, and Figure 15, the 3rd preferred embodiment of preventer of the present invention is mounted in an entry needle device 9.This entry needle device 9 has a pipe fitting 90, closes and for pushing a push rod group 91 of medicinal liquid with 90 1 large footpath section 901 airtight cunnings of this pipe fitting, and the needle body 93 linking with 90 1 path sections 902 of this pipe fitting.This preventer is same with aforementioned first, second preferred embodiment comprises a needle stand 92, sleeve pipe group 3, moving casing 4, flexible member 5, stop part 6, an end cap 7, and a upper shield 8, difference be in:
This needle stand 92 detachable liftoff and these pipe fitting 90 large footpath sections 901 are socketed, and this needle body 93 of confession passes.Whereby, make preventer of the present invention be set in this pipe fitting 90, and ring protect the needle body 93 of these pipe fitting 90 front ends.
When use, this moving casing 4 equally can be in injection process, as shown in figure 14, go deep into gradually this annular groove 30 along this axis X direction, and appear gradually this needle body 93, and after injecting program completes, as shown in figure 15, the state that is positioned at completely coated this needle body 93 and cannot moves along this axis X direction, and then reach the object of isolating this needle body 93.
Consulting Figure 16, Figure 17, is the 4th preferred embodiment of the present invention, and itself and the 3rd preferred embodiment are roughly the same, difference be in:
This entry needle device 9 also has and is contained in this pipe fitting 90 and a pencil 94 of pre-store medicament, and this push rod 91 closes with the airtight cunning of this pencil 94.This pencil 94 has a tube wall 941 around axis X, and a plug member 942.These plug member 942 these tube walls 941 of sealing are towards one end of this needle stand 92.This needle stand 92 is socketed with the path section 902 of this pipe fitting 90, and coordinates the caliber of this path section 902, and slightly different from needle stand 92 forms in the 3rd preferred embodiment.
Consulting Figure 18, Figure 19, is the 5th preferred embodiment of the present invention, and itself and the 4th preferred embodiment are roughly the same, difference be in:
This pipe fitting 90 also has an external thread part 903 that is formed on 902 1 outer surfaces of this path section.This needle stand 92 also has an internal thread part 921 that is formed on an inner surface and screws togather with these pipe fitting 90 external thread parts 903.This needle body 93 links with this needle stand 92, and has oppositely and two puncture sections 931,932 with this pencil 94 towards this moving casing 4 respectively.
Whereby, in the process screwing togather at this needle stand 92 and these pipe fitting 90 external thread parts 903, the puncture section 932 of this needle body 93 will pierce through this plug member 942 and be communicated with this pencil 94.
In sum, the preventer of entry needle device of the present invention has following advantages and Gong Xiao ︰
1, the present invention has only used inner sleeve 31, trocar sheath 32, and three pipe fittings such as moving casing 4, not only member is obviously less than prior art, cost is lower, and the annular groove 30 between this inner sleeve 31 and this trocar sheath 32 only needs to hold flexible member 5, and slide for this moving casing 4, except reducing the volume of this preventer entirety, this inner sleeve 31, trocar sheath 32 also can be stablized this moving casing 4.
2, importantly, the present invention only need utilize aforementioned terrace 313, 323 with locking surface 41, 42, and special position relationship between this stop part 6, just can make this moving casing 4 be used in conjunction with demand, form respectively the first embodiment pattern that injection guiding needle body 23 can be provided, also can be for the patient with needle body 23 phobias, formation can provide the second embodiment pattern of hiding needle body 23 before use completely, can also be for the pipe fitting 90 that is directly linked with needle body 93, the the 3rd and the 4th embodiment pattern that is directly socketed on pipe fitting 90 is provided, or for the entry needle device 9 that presets pencil 94, provide while being socketed on this pipe fitting 90, pierce through and be communicated with the 5th embodiment pattern of this pencil 94 with this needle body 93, make it after injection completes, automatically hide this needle body 23 (93) and cannot displacement, not only use processing ease, and can promote the smoothness of medical clinical injection operation, safety and practicality.
Below only add and give explanation with regard to concrete constructed embodiment of the present invention, under without separated structure of the present invention and spirit, allly be skillful in those skilled in the art scholar, still can do all variations and modification, all this changes and is still considered as being encompassed in the following claim of this case with modifying.
Claims (13)
1. a preventer for entry needle device, this entry needle utensil has a pipe fitting, and is communicated with a needle body of this pipe fitting along an axis direction, it is characterized in that this preventer comprises:
A needle stand, links with this pipe fitting and passes for this needle body;
A sleeve pipe group, links with this needle stand, and has around this axis and define first anchor ring and second anchor ring of an annular groove, and is respectively formed at this first anchor ring and this second anchor ring and two reverse terraces;
A moving casing, is set in this annular groove, and has a locking surface that is respectively formed at an inner surface, with another locking surface that is formed on an outer surface;
A flexible member, is set in this annular groove and acts on this moving casing; And
A stop part, be set between the annular groove of this first anchor ring and this second anchor ring along vertical this axis direction, make this moving casing be fastened in this stop part, and can be in the time of an external force pressure, follow this annular groove towards this needle stand direction displacement, and push this stop part and depart from this annular groove, make this moving casing be subject to the elastic acting force of this flexible member, towards the direction displacement that is in reverse to this needle stand, to described locking surface respectively with described terrace mutually against rear completely coated this needle body, and be hampered by described terrace and cannot move along this axis direction.
2. the preventer of entry needle device according to claim 1, it is characterized in that, this sleeve pipe group has around this axis and defines an inner sleeve and a trocar sheath of this annular groove, and this first anchor ring and this second anchor ring are respectively formed at outer surface of this inner sleeve and inner surface of this trocar sheath.
3. the preventer of entry needle device according to claim 2, it is characterized in that, this moving casing also has two the first recesses that utilize the variation of anchor ring potential difference to be formed on this inner surface, and described the first concave portion be you can well imagine for this stop part, accommodation space of this inner sleeve terrace.
4. the preventer of entry needle device according to claim 2, is characterized in that, this moving casing also has second recess that utilizes the variation of anchor ring potential difference to be formed on this outer surface, and this second recess provides this trocar sheath terrace an accommodation space.
5. according to the preventer of the entry needle device described in claim 3 or 4, it is characterized in that, it is the high and low potential difference of utilizing curved surface to have that aforementioned anchor ring potential difference changes, and forms this first recess and this second recess.
6. the preventer of entry needle device according to claim 3, it is characterized in that, this inner sleeve has of running through along vertical this axis direction and wears mouth, and be formed on an inner surface and have a plane ora terminalis to be emerging in a rib partly wearing mouth along this axis direction, this stop part is set in this along vertical this axis direction and wears in mouth and mount the plane ora terminalis at this rib, be subject to the elastic acting force of this flexible member and the mutual block of locking surface of this moving casing inner surface, and stably fix this moving casing.
7. the preventer of entry needle device according to claim 6, it is characterized in that, this moving casing also has the protuberance being relatively formed between described the first recess, and this stop part has an inclined-plane that is formed on one end, and in abutting connection with the restriction face on this inclined-plane, this inclined-plane by away from this needle stand and near one end of this axis towards contiguous this needle stand and extend away from the other end of this axis, make this stop part go deep into the process of this annular groove with this moving casing, pushed by the protuberance of this moving casing, and be shifted into the mouth of wearing of this inner sleeve, and depart from this annular groove, to being hampered by this rib, this restriction face is faced mutually with the locking surface of this moving casing inner surface.
8. the preventer of entry needle device according to claim 2, is characterized in that, this preventer also includes a upper shield, this upper shield and the socket of this trocar sheath, and seal this moving casing and this needle body.
9. the preventer of entry needle device according to claim 2, is characterized in that, one of them also has the several profile grooves that extended along this axis direction by the one end away from this needle stand this inner sleeve and this trocar sheath.
10. the preventer of entry needle device according to claim 2, is characterized in that, this needle body directly with this needle stand link, and this needle stand and this pipe fitting sleeving.
The preventer of 11. entry needle devices according to claim 2, is characterized in that, this needle body directly with this pipe fitting link, and this needle stand and this pipe fitting sleeving.
12. according to the preventer of the entry needle device described in claim 10 or 11, it is characterized in that, this needle stand has the several involutory portion that is formed on an outer surface, and this sleeve pipe group also has and is formed on inner surface of this inner sleeve, both one of them individual several holding sections of this trocar sheath second anchor ring, described holding section engages mutually with the involutory portion of this needle stand, make this needle stand turn relatively of this sleeve pipe group, described involutory portion can be chase, fin, and described chase, a combination of fin, it can be fin that described holding section coordinates this involutory portion, chase, and described chase, a combination of fin.
The preventer of 13. entry needle devices according to claim 12, it is characterized in that, this needle stand also has and is formed on a bulge loop of leading section, a stop ring of a contiguous rearward end, and contiguous middle part and be formed on this bulge loop with this stop ring between one encircle edge, and this inner sleeve also has the scrobicular ring that relatively this bulge loop is formed on this inner surface and engages with this bulge loop, this trocar sheath also have be formed on against one end of this stop ring and with an overhead kick of this ring edge hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310092784.0A CN104056330B (en) | 2013-03-21 | 2013-03-21 | The preventer of entry needle device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310092784.0A CN104056330B (en) | 2013-03-21 | 2013-03-21 | The preventer of entry needle device |
Publications (2)
| Publication Number | Publication Date |
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| CN104056330A true CN104056330A (en) | 2014-09-24 |
| CN104056330B CN104056330B (en) | 2016-08-24 |
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| CN201310092784.0A Expired - Fee Related CN104056330B (en) | 2013-03-21 | 2013-03-21 | The preventer of entry needle device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906662A (en) * | 2015-01-05 | 2015-09-16 | 名高医疗器械（昆山）有限公司 | Injector |
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| JPH11319090A (en) * | 1998-04-17 | 1999-11-24 | Becton Dickinson & Co | Medical apparatus and shielding body device therefor |
| CN1515328A (en) * | 2003-01-08 | 2004-07-28 | 汪贤宗 | Multifunctional safety needle cover device |
| CN1913933A (en) * | 2003-12-16 | 2007-02-14 | 贝克顿·迪金森公司 | Safety shield system for prefilled syringe |
| CN101411905A (en) * | 2007-10-16 | 2009-04-22 | 上海顶尖堂生化科技有限公司 | Needle head for safety syringe |
| CN101980737A (en) * | 2008-03-28 | 2011-02-23 | 泰尔茂株式会社 | Puncture needle assembly and medicinal liquid injector |
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2013
- 2013-03-21 CN CN201310092784.0A patent/CN104056330B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11319090A (en) * | 1998-04-17 | 1999-11-24 | Becton Dickinson & Co | Medical apparatus and shielding body device therefor |
| CN1515328A (en) * | 2003-01-08 | 2004-07-28 | 汪贤宗 | Multifunctional safety needle cover device |
| CN1913933A (en) * | 2003-12-16 | 2007-02-14 | 贝克顿·迪金森公司 | Safety shield system for prefilled syringe |
| CN101411905A (en) * | 2007-10-16 | 2009-04-22 | 上海顶尖堂生化科技有限公司 | Needle head for safety syringe |
| CN101980737A (en) * | 2008-03-28 | 2011-02-23 | 泰尔茂株式会社 | Puncture needle assembly and medicinal liquid injector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104906662A (en) * | 2015-01-05 | 2015-09-16 | 名高医疗器械（昆山）有限公司 | Injector |
| CN104906662B (en) * | 2015-01-05 | 2019-03-12 | 名高医疗器械（昆山）有限公司 | A kind of syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104056330B (en) | 2016-08-24 |
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