CN1248749C

CN1248749C - Safety unit of exsanguinating injection needle

Info

Publication number: CN1248749C
Application number: CN 02123985
Authority: CN
Inventors: 汪贤宗
Original assignee: Hongfu Science & Technology Co Ltd
Current assignee: Hongfu Science & Technology Co Ltd
Priority date: 2002-07-11
Filing date: 2002-07-11
Publication date: 2006-04-05
Anticipated expiration: 2022-07-11
Also published as: CN1467001A

Abstract

The present invention relates to a safety device of an exsanguinating injection needle. The device comprise a cover unit, a sleeve tube unit, a base unit of a needle with double heads, an injection cylinder body, etc. at least, wherein the sleeve tube unit is a hollow tube body with an L-typed guide slot, and the front end is provided with an opening which can be used for sheathing the cover unit; the base unit of a needle with double heads is a solid cylinder, a convex part is arranged on the cylinder, both ends of the convex part are penetrated by a needle with double heads, a stage section is respectively arranged at the front end and the rear end of the cylinder, and the stage sections can be combined and fixed with the injection cylinder body or other units, so the convex part can exactly move in the L-typed guide slot, and can be well guided when the sleeve tube unit is sheathed. The telescopic safety device of an exsanguinating injection needle can be formed on the premise that an original injection cylinder body and a needle head structure are not changed, and an operation position is arranged at the rear parts of needle heads to ensure use safety.

Description

The safety device of exsanguinating injection needle

Technical field

The present invention relates to a kind of safety device of exsanguinating injection needle, refer to a kind of need not to change original injection cylinder and syringe needle especially, can be widely applicable for the safety device of the exsanguinating injection needle of various injection cylinder.

Background technology

General traditional syringe cylinder structure, as announce No. 103796 and " the safe needle guard of syringe cylinder ", as shown in Figure 8, on the whole go up by an injection cylinder 1, a syringe needle 2, and a sheath 3 constituted, when nursing staff's desire is implemented injection, can outwards pull out sheath 3 from injection cylinder 1, syringe needle 2 is exposed and footpath row injection; When injection finishes, do not avoid other people and stab or cause the infection of virus accidentally, all sheath 3 need be given again and recovering on injection cylinder 1, at this moment, because the aperture of sheath 3 is less, and its operating position is positioned at the place ahead of syringe needle 2, and in the process of being inserted in again, the hand that grips sheath 3 must be with the most advanced and sophisticated 2a of the syringe needle 2 that passes by; Therefore, as long as the nursing staff is careless slightly, the most advanced and sophisticated 2a that the hand of gripping sheath 3 promptly may be subjected to syringe needle 2 stabs, even is subjected to the infection of virus; Be with, in use, safety is not good, and desirable part is to the greatest extent arranged in fact.

Because the disappearance that above-mentioned syringe cylinder structure commonly used is had, be and then the improvement of multiple high-safety injection tube is arranged, for example announce No. 161397 " safety needle ", announce No. 210509 " protection syringe cylinder ", announce No. 212302 " safety syringe reservoir of closing gate type (contain and append one) ", announce No. 232815 " the direct walk away safety syringe of blood vessel ", announce No. 234883 " safety syringe reservoir of closing gate type new construction ", announce No. 253192 " directly coupling type safety syringe-drum ", announce No. 283947 " safty pin skull structural design ", announce No. 320057 " conveniently abandoning the formula safety syringe-drum ", announce No. 349405 " can return cover safty pin skull ", announce No. 357615 " safety syringe structure improvement ", announce No. 405405 " safety syringe structure improvement ", announce No. 445860 " safety syringe-drum ", announce No. 489662 " disposable safety syringe " etc.; These high-safety injection tubes such as non-entry needle is torn open curved, promptly all need significantly change high-safety injection tube original structure used for a long time, this not only expends cost, and the scope of application is subjected to suitable restriction, can't be implemented on traditional various injection cylinders, especially, after changing original traditional injection cylinder structure, make the smoothness of syringe cylinder operation, the watertight structure of injection and the safety of using thereof, all be difficult to the problem that overcomes, and have much room for improvement.

Summary of the invention

Based on above-mentioned cause, main purpose of the present invention is promptly providing a kind of safety device of exsanguinating injection needle, it can be under the principle that does not change original injection cylinder and double needle tube structure, only needing can increase the suitability and the safety thereof of product with adding a L type guide groove on the syringe needle cylindrical shell and making safe needle guard operating position move the rear of establishing to syringe needle.

Another object of the present invention is to provide a kind of safety device of exsanguinating injection needle, form a telescopic blood drawing needle safety apparatus by tube unit and combining of double needle base unit, and make operating position be positioned at the syringe needle rear, stab accidentally with in avoiding using, and guarantee its safety.

A time purpose of the present invention is to provide a kind of safety device of exsanguinating injection needle, and wherein, this needle unit length can run through and is fixed on the double needle base unit, and is finished protection by tube unit and injection cylinder; And this double needle base unit is a solid cylindrical shell, need not to change original injection cylinder and needle head structure, can directly overlap to be fixed in different injection cylinders, and can have extensive applicability.

For achieving the above object, the technical solution used in the present invention is as follows:

A kind of safety device of exsanguinating injection needle comprises the base unit and an injection cylinder of a cover unit, a tube unit, a tool double needle;

This tube unit comprises that a front end has the body of perforate, and a protuberance of being located at this inside, body rear end;

The base unit of this double needle is fixed in the stiff end of injection cylinder front end, and is nested with by tube unit, and this base unit comprises: one has the solid cylindrical shell in big footpath of L type guide groove; One is located at two class's sections than path at these forward and backward two ends of cylindrical shell respectively; One runs through and is fixed in the double needle of class's section at this cylindrical shell and two ends thereof, and this double needle has preceding syringe needle and back syringe needle; One is located at two flanges of this cylinder back-end on the diameter opposite position respectively; Wherein, this L type guide groove comprises stopper point, a rear end, a front end turning point and a traversing section;

Tube unit can be placed in the periphery of the base unit of double needle, and this protuberance just can move in L type guide groove, and be subjected to good guiding, the needle holder of double needle also can be directly and being combined into one than path class section of the base unit of double needle, and can in the perforate of tube unit, overlap a solid cover unit, when this protuberance button ends in the traversing section of L type guide groove, make this preceding syringe needle be subjected to tube unit and hide completely, thereby constitute the safety device of exsanguinating injection needle independently.

The safety device of exsanguinating injection needle, this protuberance and guide groove can be provided with in pairs to increase guide function, and it is upper and lower when mobile that tube unit is done on the double needle base unit, has more stability.

A kind of safety device of exsanguinating injection needle comprises base unit, and the injection cylinder of a cover unit, a tube unit, a double needle;

This tube unit, for front end has the hollow tube of a perforate, its periphery has a L type guide groove, and this guide groove comprises a front end stopper point, a rear end turning point and a traversing section;

The base unit of this double needle is fixed in the stiff end of injection cylinder front end, and is nested with by tube unit, and this base unit comprises the solid cylindrical shell in big footpath; One is located at two flanges of this cylinder back-end on the diameter opposite position respectively; One be located at respectively this barrel front end and rear end two than path class section; One runs through and is fixed in the double needle of the path class section at this cylindrical shell and two ends thereof, and this double needle has preceding syringe needle and back syringe needle, and one is located at this than the protuberance on the front end periphery of the solid cylindrical shell in big footpath;

This tube unit can be placed in the periphery of the base unit of double needle, and the protuberance of this base unit just can move in the L of this tube unit type guide groove, and be subjected to good guiding, the needle holder of double needle then with this double needle base unit be bonded into one than path class section; And can in the perforate of tube unit, overlap a solid cover unit, when this protuberance button ends in the traversing section of L type guide groove, make the preceding syringe needle of this double needle base unit be subjected to hiding completely, thereby constitute the safety device of an exsanguinating injection needle.

The safety device of exsanguinating injection needle, this protuberance and guide rail can be provided with in pairs to increase guide function, and it is upper and lower when mobile that tube unit is done on the double needle base unit, has more stability.

Use beneficial effect of the present invention to be: need not to change under the principle of original injection cylinder and needle head structure, can constitute a telescopic blood drawing needle safety apparatus, and making operating position be positioned at the rear of syringe needle, with the safety of guaranteeing that it uses.

Description of drawings

For further understanding feature of the present invention, technological means and the concrete function of being reached, purpose, enumerate below of the present invention than specific embodiment, continue describe in detail with graphic, figure number as after:

Fig. 1 is the schematic perspective view of the present invention's first preferred embodiment;

Fig. 2 is the perspective exploded view of the present invention's first preferred embodiment;

Fig. 2 A～2C is first to the 3rd operating state key diagram of the present invention's first preferred embodiment;

Fig. 3 is the generalized section of the present invention's first preferred embodiment;

Fig. 3 A is the section action diagram of the present invention's first preferred embodiment;

Fig. 4 is the perspective exploded view of second embodiment of the invention;

Fig. 5 is the schematic perspective view of second embodiment of the invention;

Fig. 6 A～6C is first to the 3rd operating state explanation sketch map of second embodiment of the invention;

Fig. 7 is the perspective exploded view of third embodiment of the invention;

Fig. 8 is the enforcement state schematic perspective view of syringe cylinder commonly used.

The specific embodiment

As shown in Figure 1 to Figure 3, in the present invention's first preferred embodiment, invention can be implemented in the injection cylinder 50 of blood drawing entry needle, this device comprises a cover unit 10, a tube unit 20 and a double needle base unit 30 at least; Wherein:

This tube unit 20 for front end has the hollow tube of a perforate 21, and is provided with a D shape protuberance 22 in inside, rear end; These D shape protuberance 22 1 sides are an arc sections 220, and opposite side is a flat part 221;

This double needle base unit 30, be one to have the solid cylindrical shell 32 in big footpath of L type guide groove 31, cylindrical shell 32 two ends are run through by double needle 41 has preceding syringe needle 41a and back syringe needle 41b, the cylindrical shell rear and front end respectively is provided with a class's section 33 than path, 35, and big footpath cylinder back-end respectively is provided with a flange 351 on the diameter opposite position, can combine fixing with stiff end 51 or other unit of injection cylinder 50, and as the 2nd and 2A-2C figure shown in, L type guide groove 31 has rear end stopper point 31a, middle guide groove 310, one front end turning point 31b, one traversing section 311, wherein, on the traversing section 311 successively by forming an arc location indentations 314 behind the two reducing curved portions 312-312, form a square button in two reducing horn-like parts, 313 backs thereafter again and end recess 315, shown in 2A figure

Tube unit 20 can be inserted in double needle base unit 30, and D shape protuberance 22 just can move in guide groove 31, and is subjected to good guiding, and the needle holder of double needle 41 then can be fixed with double needle base unit 30 forward and backward

class sections

33,35 and is combined into one; When the D of tube unit 20 shape protuberance 22 in new product anteposition to be used during in the arc location indentations 314 (shown in Fig. 2 A) of traversing section 311; the preceding syringe needle 41a of double needle 41 and back syringe needle 41b are hidden in respectively before not using in tube unit 20 and the injection cylinder 50 and are protected; as shown in Figure 3; and can in perforate 21, overlap a solid cover unit 10 again; and make the preceding syringe needle 41a of syringe needle 41 be subjected to hiding completely; and then constitute the safety device of exsanguinating injection needle independently; and overlap the stiff end 51 of the injection cylinder 50 that is fixed in by double needle base unit 30 rear ends 35; and by the rear of flange 351 embedding stiff ends 51, to increase its constant intensity.

Shown in Fig. 2 A～2C and Fig. 3 A, when desire is implemented injection, can pull down cover unit 10 earlier, the D type protuberance 22 of tube unit 20 also can shift out (shown in Fig. 2 B) from front end arc location indentations 314, move backward in guide groove 31 via traversing section 311, turning point 31b, at this moment, blood drawing syringe needle 41 can stretch out when D type protuberance 22 moves to stopper point, rear end 31a from the perforate 21 of tube unit 20, syringe needle 41 promptly exposes fully, and form a telescopic needle safety apparatus, as shown in Figure 3A; Because the operating position of hand grip sleeve pipe unit 20 is positioned at the rear of syringe needle 41 all the time, need not preceding needle tip 41a through syringe needle 41; Therefore, do not have the facts of stabbing or be subjected to viral infection in the use and take place, and have safety.

When injection finishes, 22 of the D type protuberances of tube unit 20 need contrary operation, can be along stopper point, rear end 31a, turning point 31b and traversing section 311 and when moving to the arc location indentations 314 of front end, needle unit 40 promptly is hidden in the tube unit 20 once again, the multiple cover unit 10 of recovering in perforate 21 is promptly replied the blood drawing syringe needle and is not used preceding guard mode shown in Fig. 3 and Fig. 2 A; When tube unit 20 is screwed with counter-clockwise direction once again, D type protuberance 22 just enters square the button by location indentations 314 to be ended in the recess 315, shown in Fig. 2 C, at this moment, because the flat part 221 of D type protuberance 22 just in time shelves terminates in square plane of buckleing the dihedral choke 313-313 that ends recess 315, so can't make D type protuberance 22 enter location indentations 314 once again, and make the preceding needle tip 41a of double needle 41 be hidden in forever tube unit 20 in, do not have with needle point 41a before guaranteeing and to stab.Because in this process, the operating position of hand grip sleeve pipe unit 20 is positioned at the rear of the preceding needle tip 41a of double needle 41 all the time, need not preceding needle tip 41a through double needle 41; Therefore, do not have the facts of stabbing or be subjected to viral infection fully and take place, and have safety; This architectural feature, real is main characteristic of the present invention place.

Shown in Fig. 4～6, be perspective exploded view, axonometric chart and the action sketch map of second embodiment of the invention; In the present invention's second preferred embodiment, this device comprises a cover unit 10, a tube unit 20A, a double needle base unit 30A and an injection cylinder 50 etc. at least; Wherein:

This tube unit 20A, comprise that hollow tube and that a front end has a perforate 21 is located at the L type guide groove 22 of its periphery, this guide groove 22 comprises a front end stopper point 22a, middle guide groove 220, a rear end turning point 22b and a traversing section 221, wherein, traversing section 221 comprises one again successively by the arc location indentations 224 that forms behind the two reducing curved portions 222-222, the square button that forms behind two reducing horn-like part 223-223 thereafter ends recess 225 again and again, shown in Fig. 6 A ~ 6C;

This double needle base unit 30, comprise big solid cylindrical shell 32A in footpath, one respectively is located at the class's

section

33,35 than path of this cylindrical shell 32A rear and front end, one runs through and is fixed in the double needle 41 of class's

section

33,35 at this cylindrical shell 32A and two ends thereof, and double needle 41 has preceding syringe needle 41a and back syringe needle 41b, one respectively establish body in this cylindrical shell 32A rear end 35 flange 351 on the diameter opposite position, one is located at the D shape protuberance 34 on this solid cylindrical shell 32A front end periphery, one side of this D shape protuberance 34 is an arc sections 340, and opposite side is a flat part 341 etc.;

Tube unit 20 can be inserted in double needle base unit 30, this D shape protuberance 34 just can move in guide groove 22, and being subjected to good guiding, the double needle 41 with preceding syringe needle 41a and back syringe needle 41b then can be individually fixed on the forward and backward

class section

33,35 of double needle base unit 30; When the D of double needle base unit 30 shape protuberance 34 in new product anteposition to be used during in the arc location indentations 224 of traversing section 221; double needle 41 is hidden in respectively before not using in tube unit 20 and the blood drawing injection cylinder 50 and is protected; and can in perforate 21, overlap a solid cover unit 10; and make double needle 41 be subjected to hiding completely; and then constitute the safety device of exsanguinating injection needle independently; and overlap the stiff end 51 of the injection cylinder 50 that is fixed in by cylindrical shell 32A rear end 35; and increase its constant intensity by flange 351 with the rear that embeds stiff end 51, as shown in Figure 5.

Shown in Fig. 4 and Fig. 6 A-6C, when desire is implemented injection, can take off cover unit 10 earlier, the D type protuberance 34 of double needle base unit 30 also can shift out (shown in Fig. 6 B) from front end arc location indentations 224, via traversing section 221, turning point 22b and in middle guide groove 220, move forward, at this moment, the preceding syringe needle 41a of double needle 41 can stretch out when D type protuberance 34 moves to front end stopper point 22a from the perforate 21 of tube unit 20, syringe needle 41 promptly exposes fully, and forms a telescopic needle safety apparatus; Because the operating position of hand grip sleeve pipe unit 20 is positioned at the rear of syringe needle 41 all the time, need not preceding needle tip 41a through double needle 41; Therefore, do not have the facts of stabbing or be subjected to viral infection in the use and take place, and have safety.

And when injection finishes, 20 of tube units need contrary operation, D type protuberance 34 is promptly along front end stopper point 22a, the turning point 22b of middle guide groove 220 and traversing section 221 and when moving to the arc location indentations 224 of rear end, double needle 41 promptly is hidden in the tube unit 20 once again, the multiple cover unit 10 of in perforate 21, recovering, promptly reply the blood drawing syringe needle do not use before as shown in Figure 5 guard mode; When tube unit 20 is screwed once again in a clockwise direction, D type protuberance 34 just enters square the button by location indentations 224 to be ended in the recess 225, at this moment, because the flat part 341 of D type protuberance 34 just in time shelves terminates in square plane of buckleing the dihedral choke 223-223 that ends recess 225, so can't make D type protuberance 34 enter location indentations 224 once again, so that the preceding syringe needle 41a of syringe needle 41 is hidden in the tube unit 20 forever, does not have with syringe needle 41a before guaranteeing and stab.Because in this process, the operating position of hand grip sleeve pipe unit 20 is positioned at the rear of syringe needle 41 all the time, need not preceding syringe needle 41a through syringe needle 41; Therefore, do not have the facts of stabbing or be subjected to viral infection fully and take place, and have safety; This architectural feature, real is main characteristic of the present invention place.

As shown in Figure 7, perspective exploded view for third embodiment of the invention, in this preferred embodiment, the member of this device is identical with above-mentioned second embodiment substantially, relevant explanation is omitted, different are in the outer peripheral face of the rear end path class section 35 of the base unit 30B of this double needle is smooth surface in order to do just closely matching with the slippery inner surface of blood drawing injection cylinder 50 stiff ends 51, and reaches the effect identical with above-mentioned preferred embodiment.

The topmost intention spirit of the present invention is to provide a kind of usefulness that is constituted by a cover unit, a tube unit and a double needle base unit etc. can give the safety device of the retractable needle of locking later, and make operating position be positioned at the rear of syringe needle, stab accidentally with in avoiding using, and guarantee the safety that it uses; Therefore, need not to change under the principle of any original injection cylinder and needle head structure, can directly overlap and be fixed on the different blood drawing injection cylinders, and can have extensive applicability, and operation is very easy; Its architectural feature and the space kenel that is constituted be real to be intention of the present invention institute distinctive feature.

The locking means (being that square button ends recess) of the protuberance to protuberance and guide groove and the guide groove are that the above-mentioned preferred embodiment of the present invention is lifted and a special case of explanation.

In sum, the present invention need not to change under the principle of any original injection cylinder and needle head structure, promptly can be fixed in second joint on the different injection cylinders by the direct cover of the simplest means.

Claims

1. the safety device of an exsanguinating injection needle comprises the base unit and an injection cylinder of a cover unit, a tube unit, a tool double needle;

The base unit of this double needle is fixed in the stiff end of injection cylinder front end, and is nested with by tube unit, and it is characterized in that: this base unit comprises: one has the solid cylindrical shell in big footpath of L type guide groove; One is located at two class's sections than path at these forward and backward two ends of cylindrical shell respectively; One runs through and is fixed in the double needle of class's section at this cylindrical shell and two ends thereof, and this double needle has preceding syringe needle and back syringe needle; One is located at two flanges of this cylinder back-end on the diameter opposite position respectively; Wherein, this L type guide groove comprises stopper point, a rear end, a front end turning point and a traversing section;

2. the safety device of exsanguinating injection needle according to claim 1 is characterized in that, this protuberance and guide groove can be provided with in pairs to increase guide function, and it is upper and lower when mobile that tube unit is done on the double needle base unit, has more stability.

3. the safety device of exsanguinating injection needle according to claim 1 is characterized in that, this protuberance is a D shape protuberance, and this D shape protuberance comprises that a side is that an arc sections and opposite side are a flat part.

4. the safety device of exsanguinating injection needle according to claim 3, it is characterized in that, this traversing section comprises one again successively by forming an arc location indentations after the two reducing curved portions, behind two reducing horn-like parts thereafter, form a square button again and end recess, act on using button fastening position, back with guiding and the use prelocalization that increases this tube unit D shape protuberance.

5. the safety device of exsanguinating injection needle according to claim 3 is characterized in that, in the traversing section of the base unit of this double needle, comprises that further a square button ends recess; And this tube unit rear end inwall comprises a D type protuberance; When this tube unit is placed in double needle base unit periphery, and this tube unit is when releasing forward, the D type protuberance of this tube unit can buckle into square button of traversing section along the L type guide groove of double needle base unit to be ended in the recess, and the D type protuberance that makes tube unit just in time embedding terminate in square the button and end in the recess, the preceding needle tip of the base unit barrel front end of this double needle is stopped in tube unit.

6. the safety device of an exsanguinating injection needle comprises base unit, and the injection cylinder of a cover unit, a tube unit, a double needle; It is characterized in that:

7. the safety device of exsanguinating injection needle according to claim 6 is characterized in that, this traversing section comprises one successively by forming an arc location indentations after the two reducing curved portions, forms a square button again and end recess behind two reducing horn-like parts thereafter.

8. the safety device of exsanguinating injection needle according to claim 6 is characterized in that, this protuberance is a D shape protuberance, and this D shape protuberance comprises that a side is that an arc sections and opposite side are a flat part.

9. the safety device of exsanguinating injection needle according to claim 6, it is characterized in that, the traversing section of this tube unit comprises that further a square button ends recess, and the base unit of this double needle comprises a D type protuberance, be inserted in the periphery of the base unit of double needle when this tube unit, and this tube unit is when spurring forward, the D type protuberance of the base unit of this double needle can buckle into square the button along the traversing section of the L type guide groove of this tube unit to be ended in the recess, and the D type protuberance that makes the double needle base unit just in time embedding terminate in square the button and end in the recess, the preceding syringe needle of the blood drawing double needle on this cylindrical shell is stopped in this tube unit.

10. the safety device of exsanguinating injection needle according to claim 6 is characterized in that, this protuberance and guide rail can be provided with in pairs to increase guide function, and it is upper and lower when mobile that tube unit is done on the double needle base unit, has more stability.