CN1515329A

CN1515329A - Disposable safety needle cover device

Info

Publication number: CN1515329A
Application number: CNA031000711A
Authority: CN
Inventors: 汪贤宗
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-01-08
Filing date: 2003-01-08
Publication date: 2004-07-28

Abstract

The present invention relates to a disposable safety needle cover device. The device at least includes a cylinder body base seat unit and a sleeve unit, said sleeve unit is a hollow tube body whose periphery is equipped with slideway, its front end has an opening hole through which the needle unit can be telescoped, said cylinder body base seat unit is a short hollow tube body whose periphery is equipped with a projection, can be cover-fixed in the front end of various different traditional syringes with needle unit, when the sleeve unit is cover-inserted, the projection of the cylinder body base seat unit can be moved in the slideway of sleeve unit. On the premise of having no need of changing original syringe and needle structure it can be formed into a telescopic hypodermic needle safety device.

Description

Disposable safety needle guard device

Technical field:

The present invention relates to a kind of disposable safety needle guard device, be meant a kind of injection needle that has been polluted that prevents to use especially, stab medical personnel or other third party's disposable safety needle guard device.

Background technology:

General traditional safe injection needle barrel structure, as the 6093170th exposure of United States Patent (USP), comprise an injection tube (barrel) 10, a plunger (plunger) 20 and a sleeve pipe (sleeve) 30, wherein, injection tube 10 and plunger 20 are syringe commonly used, and the principal character of this patent is the preceding distal process of injection tube 10 commonly used is established a protuberance (tab) 13, and on sleeve pipe 30, establish long u shape guide groove 33, utilize stop section 35 protuberances 13 of the bottom land of this guide groove 33, so, in actual use, the safety existing problems of this sleeve pipe 30, its reason are that this sleeve pipe 30 is shaped for plastic material, this stop section 35 has the elasticity of plastic material itself, make 35 pairs of these protuberances in this stop section 13 and locking fully, but can make protuberance 13 be moved out of use once again, its safety is lost.And, this injection tube 10 with protuberance 13 is in order to be complementary with sleeve pipe 30, protuberance 13 can be slided in guide groove 33 smoothly, its dimensions is subjected to influence is set need makes moderate change of protuberance 13, cause syringe cylinder can't continue to use the international standards of use original structure for a long time, this not only expends high die cost, and and the compatible interoperability between within the trade homotype product is subjected to suitable restriction, also can't be used for other injection cylinder of the same type, especially after changing original structure, the watertight structure that makes the smoothness of syringe cylinder 10 and 20 operations of plunger and injection thereof with and the safety used all be difficult to the technical problem that overcomes and demand urgently improving.

Summary of the invention:

Main purpose of the present invention is to provide a kind of disposable safety needle guard device, used the syringe needle that has been polluted, can be quickly and effectively with syringe needle retraction and deadlock in the lock groove of safety needle guard, in case just can't shift out use once again after making the syringe needle retraction, to guarantee its safety.

Another object of the present invention is to provide a kind of disposable safety needle guard device, wherein, this tube unit can be solid by cylindrical shell base unit and the traditional simple and easy tight cover of injection cylinder, traditional injection cylinder needn't be done under any change, just can directly overlap and be fixed on different traditional injection cylinders, thereby can make the present invention have the compatibility and the suitability widely.

The present invention is in order to reach above-mentioned purpose and effect, the technical scheme that it adopted comprises: one can closely overlap the tube unit that the cylindrical shell base unit and that is fixed in the injection cylinder front end is placed on cylindrical shell base unit periphery, wherein: this cylindrical shell base unit, be a hollow short pipe body, this body periphery is provided with a protuberance; This tube unit, it is this hollow tube, its periphery has a microscler chute, this chute comprises always to a portion and a transverse part, wherein, directly comprise a front end stopper section, turning point, a rear end to portion, this transverse part comprises that then a square location indentations, a locking square groove 225 and are located at the portion that places restrictions in locking square groove upstream end the place ahead, and this portion of placing restrictions on is that a slice assembly and the unitary bulk material of safe needle guard fuse; Therefore, this tube unit can be placed in the periphery of this cylindrical shell base unit, and the protuberance on this cylindrical shell base unit just can move in the microscler chute of this tube unit, and is subjected to good guiding; When this tube unit is mobile, when this protuberance button terminates in turning point, the traversing section rear end location indentations of microscler chute, this needle unit is shunk in the tube unit in order to using forward; Mobile backward when this tube unit, when making this protuberance move to this microscler chute front end stopper section, the needle unit that is fixed in this injection cylinder front end is stretched out the front end of tube unit, uses for injection; After the use, this tube unit moves forward, promptly this protuberance is by directly moving toward transverse part to portion, move toward location indentations again and cross this and place restrictions on portion and when being locked in the locking square groove, this protuberance is that deadlock is in the locking square groove, tube unit can not be moved once again, and this needle unit is shunk in the tube unit and stop motionlessly, thereby constitute the safety device of hypodermic needle independently.

Disposable safety needle guard device provided by the invention, need not to change under the principle of any original injection cylinder and drop connection fittings structure, can directly overlap in the catheter adapter that is fixed in different injection cylinders or drop, and can have extensive applicability, and it is very easy to operate, and has effectively avoided the secondary use.

Description of drawings:

Fig. 1 is the perspective exploded view of embodiment 1;

Figure 1A is the three-dimensional enlarged diagram of protuberance of the present invention;

Fig. 2 is embodiment 1 a untapped schematic perspective view;

Fig. 3 is the profile of Fig. 2;

Fig. 4 is the local amplification profile of Fig. 3;

Fig. 5 is the profile of Fig. 3 user mode;

Fig. 6 A～6C is the operating instruction sketch map of the embodiment of the invention first to the 3rd user mode;

Fig. 7 is the section action diagram from Fig. 6 B 7-7 line;

Fig. 8 is the section action diagram from Fig. 6 C 8-8 line;

Fig. 9 is the perspective exploded view of embodiment 2;

The specific embodiment:

Embodiment 1:

As shown in Figure 1 to Figure 3, may be implemented in hypodermic injection tube 50, its front end is established a needle unit 40 these devices and is comprised that at least one can closely overlap the tube unit 20 that the cylindrical shell base unit 30 and that is fixed in injection tube 50 front ends is placed on cylindrical shell base unit periphery, wherein:

This cylindrical shell base unit 30 is one to have the short tube body 32 of through hole 35, and is provided with a card in its periphery and ends protuberance 34; This card ends protuberance 34, can make any feasible shape with following lock groove 225 mutual lockings, in the present embodiment, shown in Figure 1A, this card ends protuberance 34, makes low early and high after, and a right low left side is high, slightly like the shape of D shape section so that card ends protuberance 34 be easy to be set in the tube unit 20 after, promptly be difficult for being moved out of again after being easy to be limited in the following lock groove 225 again.Detailed speech, this protuberance 34 comprises a D shape face 341, second trapezoidal faces 342, the 3rd D shape face 343, the 4th trapezoidal faces 344, end face 345 and bottom surface 346, wherein, this protuberance 34 be characterised in that except that bottom surface 346 and end face 345 for the square, first 341 area is greater than second, second greater than the 3rd successively, the 3rd greater than fourth face, and end face 345 is an arc inclined plane, promptly be cambered surface by second 342 higher past lower fourth face 344, simultaneously, also done the arc inclination by first towards the 3rd face again, snapped in smoothly in the locking square groove 225 so that card ends protuberance 34.

This tube unit 20, be hollow tube 21 with a chute 220, the top of this chute 220 is covered by a dust cap 22, to meet health, these body 21 front ends are provided with a perforate 21B, can for the syringe needle 41 of needle unit 40 by flexible, the length of this chute 220 is less than the length of body 21, in the present embodiment, as shown in Figure 1, this chute is a T type chute 220, comprise always to a portion 221 and a transverse part 222, wherein, directly comprise a front end stopper section 221F to portion 221, one rear

end turning point

221R, 222 of this transverse parts comprise the square location indentations 224 of first (left side) end, the locking square groove 225 and one of second (right side) end is located at the portion that places restrictions on 227 of locking square groove 225 upstream ends.

Therefore, be fixed in cylindrical shell base units 30 before the injection tube 50 and can be tube unit 20 and be inserted in, and protuberance 34 just can guide mobilely in chute 220, and be subjected to good guiding, syringe needle 41 can be capable of expansion and contraction in tube unit 20; When the protuberance 34 of cylindrical shell base unit 30 in new product anteposition to be used in the location indentations 224 of traversing section 221 when (as shown in Figure 6A); can make needle unit 40 before not using, be hidden in interior and protected; and the needle point 41a that makes syringe needle 41 is subjected to hiding completely protection; and then constitute a needle safety apparatus independently; and the path connecting portion 51 of the injection cylinder 50 that cover is fixed in by cylindrical shell base unit 30 rear ends 35, shown in Fig. 1,3,4,5.

Consult shown in Fig. 5 and Fig. 6 A-6C, when desire is implemented injection, can be earlier the protuberance 34 self-align recesses 224 of base unit 30 be shifted out (shown in Fig. 5 and Fig. 6 A-6C), via traversing section 222, turning point 221R and in chute 220, move forward, at this moment, the syringe needle 41 of needle unit 40 can stretch out when protuberance 34 moves to front end stopper section 221F from the front end perforate 21B of tube unit 20, and syringe needle 41 promptly exposes fully, and form a telescopic needle safety apparatus, as shown in Figure 5; 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 needle point 41a through syringe needle 41; Therefore, the thing of not stabbing or be subjected to viral infection in the use takes place, and has safety.

When injection finishes, 20 of tube units need contrary operation, protuberance 34 is promptly along front end stopper section 221F, turning point, the rear end 221R of chute 220 and traversing section 222 and when moving to the location indentations 224 of rear end, needle unit 40 promptly be hidden in once again tube unit 20 in, promptly reply hypodermic needle do not use before as Fig. 5,7 and Fig. 6 B shown in guard mode; When base unit 30 is screwed in a clockwise direction, protuberance 34 is just entered in the locking square groove 225 by location indentations 224, as Fig. 6 C and shown in Figure 8, at this moment, protuberance 34 is just crossed the portion of placing restrictions on 227 and is entered in the locking square groove 225, in a single day protuberance 34 enters behind the locking square groove 225 promptly by block in locking square groove 225, as shown in Figure 8, because it is a lot of that the end face of protuberance 34 left side is higher than the root edge height of the portion of placing restrictions on 227, after so in a single day protuberance 34 enters locking square groove 225, placed restrictions on stopping of portion 227, the protuberance 34 exhausted difficult portions of placing restrictions on 227 that skid off.Can guarantee that like this needle point 41a of needle unit 40 forever is hidden in the inside of tube unit 20, not have and stab possibility.Because in this process, the operating position of hand grip sleeve pipe unit 20 also is positioned at the rear of syringe needle 41 all the time, need not needle point 41a through syringe needle 41; Therefore, the facts of not stabbing or be subjected to viral infection fully takes place, and has safety.

Around here should the expositor, be in order to guarantee that further condom pipe unit 20 is perfectly safe in the use in the present embodiment, in needle stand unit 40, allow used contaminated pinhead 41 after blocking during retraction, stop to be moved out of once again the possibility of use, special traversing section 221 left side sections with T type chute 220 are made to be had and protuberance 34 friction tight location indentations 224, right section is made has one via entering friction tight locking square groove 225 behind the block of placing restrictions on portion 227 again, because tube unit 20 is the plastics ejection formation, reach in design in the selection of material, be painstakingly to design order to place restrictions on portion 227 and have favorable elasticity and obdurability, to make protuberance 34 by placing restrictions on after portion 227 belows buckle in the locking square groove 225, place restrictions on portion 227 and still keep the intensity of its former tool, the bulk material of placing restrictions on portion 227 as seen from the figure and be a slice assembly and condom pipe unit 20 fuses.

In order to make operation convenient, shown in Fig. 1 and Figure 1A, the arc sloped top face towards the right side from a left side is as mentioned above made at the top of protuberance 34, promptly be cambered surface by second 342 higher past lower fourth face 344, simultaneously, also done the arc inclination by first 341 towards the 3rd 343 again, during with handled easily tube unit 20, protuberance 34 is easy to cross the portion of placing restrictions on 227 and enters in the locking square groove 225, in case right protuberance 34 enters behind the locking square groove 225 promptly by block in locking square groove 225, as Fig. 6 C and shown in Figure 8, because it is a lot of that the end face of protuberance 34 left side is higher than the root edge height of the portion of placing restrictions on 227, so after in a single day protuberance 34 enters locking square groove 225, placed restrictions on stopping of portion 227, the protuberance 34 exhausted difficult outsides that skid off the portion of placing restrictions on 227.So, the syringe needle 41 of needle stand unit 40 is in case in the retraction needle guard unit 20 and after making protuberance 34 lock locking square groove 225, not only can not injure medical matters or other personnel of contact needle tubing again, and used syringe needle can not be used once again.

Present embodiment another feature is, the middle periphery of tube unit 20 adds an on-slip bulge loop 23, to make things convenient for the user finger grip, and as shown in Figure 4 at tube unit 20 rear end inwalls, form a loudspeaker expanded hole 228 and a shoulder 229 again, since the overall size D1 of external diameter that the height of protuberance 34 adds upper shell base unit 30 less than the maximum inner diameter D3 of loudspeaker expanded hole 228 greater than the minimum diameter D2 of loudspeaker expanded hole 228, this one defines characteristics such as the favorable elasticity that plastic material has of adding tube unit 20 and obdurability, when not only helping injection cylinder 50 with tube unit 20 combinations, these cylindrical shell base unit 30 cards end protuberance 34 and are easy to insert in the tube unit 20, and more can simplify the shaping dies structure of tube unit 20, otherwise card ends the height of protuberance 34 adds the overall size D1 of external diameter of upper shell base unit 30 much larger than the size of the internal diameter of tube unit 20, can't make these cylindrical shell base unit 30 cards end protuberance 34 directly is inserted in the tube unit 20, the rear end of tube unit 20 must be formed a crack again, wait treat that this cylindrical shell base unit 30 cards end protuberance 34 and are inserted in the tube unit 20 after, again this crack is sealed in the thermal bonding mode, made the shaping dies structure and the assembling of tube unit 20 all quite loaded down with trivial details.

Embodiment 2:

As shown in Figure 9, identical with embodiment 1 substantially, different places be the dust cap of embodiment 1 is removed, spare part that surplus person is identical or parts all indicate reference number inequality, can be used for mutual contrast, for the purpose of simplified illustration, relevant explanation is omitted.

In addition, where necessary, T type chute 22 and protuberance 34 in the foregoing description, in the structural strength of tube unit 20 and cylindrical shell base unit 30 allow following, the twice T type chute of diameter opposite position also can be set in the periphery of tube unit 20, relatively, on the periphery of cylindrical shell base unit 30, also establish two protuberances 34, make cylindrical shell base unit 30 in tube unit 20 to slide guiding more stable.

The locking means of the protuberance to protuberance and guide groove and the guide groove (i.e. card end square groove or square button ends recess) are the illustrational special case of the above embodiment of the present invention, not limited thereto, other still has many means that are equal to use, for example, protuberance 34 can change square body or polyhedral body into, the T guide groove can change into L shaped or I shape guide groove, and both integrate and also can with turning point, rear end 221R and location indentations 224.

Claims

1. disposable safety needle guard device, be to be applicable to hypodermic injection cylinder, the affixed needle unit of this barrel front end, this safety device comprises that one can closely overlap the tube unit that the cylindrical shell base unit and that is fixed in the injection cylinder front end is placed on cylindrical shell base unit periphery, it is characterized in that:

This cylindrical shell base unit is a hollow short pipe body, and this body periphery is provided with a protuberance;

This tube unit, it is this hollow tube, its periphery has a microscler chute, this chute comprises always to a portion and a transverse part, wherein, directly comprise a front end stopper section, turning point, a rear end to portion, this transverse part comprises that then a square location indentations, a locking square groove 225 and are located at the portion that places restrictions in locking square groove upstream end the place ahead, and this portion of placing restrictions on is that a slice assembly and the unitary bulk material of safe needle guard fuse;

This tube unit can be placed in the periphery of this cylindrical shell base unit, and the protuberance on this cylindrical shell base unit just can move in the microscler chute of this tube unit, and is subjected to good guiding; When this tube unit is mobile, when this protuberance button terminates in turning point, the traversing section rear end location indentations of microscler chute, this needle unit is shunk in the tube unit in order to using forward; Mobile backward when this tube unit, when making this protuberance move to this microscler chute front end stopper section, the needle unit that is fixed in this injection cylinder front end is stretched out the front end of tube unit, uses for injection; After the use, this tube unit moves forward, promptly this protuberance is by directly moving toward transverse part to portion, move toward location indentations again and cross this and place restrictions on portion and when being locked in the locking square groove, this protuberance is that deadlock is in the locking square groove, tube unit can not be moved once again, and this needle unit is shunk in the tube unit and stop motionlessly, thereby constitute the safety device of hypodermic needle independently.

2. disposable safety needle guard device according to claim 1, it is characterized in that this card ends protuberance and makes low early and high afterly, and the high summary in a right low left side is like the shape of D shape section, so that after protuberance is easy to be set in the tube unit, promptly be difficult for being moved out of again after being easy to be limited in the above-mentioned lock groove again.

3. disposable safety needle guard device according to claim 1 is characterized in that, this microscler chute is a long T type chute.

4. disposable safety needle guard device according to claim 1 is characterized in that, this microscler chute is a long L type chute.

5. disposable safety needle guard device 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.

6. disposable safety needle guard device according to claim 1, it is characterized in that, the protuberance of this cylindrical shell base unit further comprises one the one D shape face, one second trapezoidal faces, one the 3rd D shape face, one the 4th trapezoidal faces, one end face and a bottom surface, wherein, the bottom surface of this protuberance 34 and end face are square, first area is greater than second, second greater than the 3rd successively, the 3rd greater than fourth face, and end face is an arc inclined plane, promptly is cambered surface by second higher past lower fourth face, simultaneously, also done the arc inclination by first towards the 3rd face again, be able to snap in smoothly in the locking square groove by the portion of placing restrictions on so that card ends protuberance.

7. disposable safety needle guard device according to claim 1 is characterized in that, this hollow tube is provided with an anti-slip ring in its periphery again.

8. disposable safety needle guard device according to claim 1, it is characterized in that, form a loudspeaker expanded hole and a shoulder at tube unit rear end inwall, and the top of this protuberance is made from low early and high after arc sloped top face, be easy to insert in the tube unit to make things convenient for this cylindrical shell base unit protuberance.

9. disposable safety needle guard device according to claim 1, it is characterized in that, the high arc sloped top face low towards the right side from a left side made at the top of this protuberance, during with the handled easily tube unit, protuberance is easy to cross the portion of placing restrictions on and enters in the locking square groove, and in a single day protuberance is entered behind the square groove promptly by block in the locking square groove.

10. disposable safety needle guard device according to claim 1 is characterized in that, the root edge height that is higher than the portion of placing restrictions on the left of the end face of this protuberance is a lot of, so after in a single day protuberance enters the locking square groove, placed restrictions on stopping of portion, the difficult outside that skids off the portion of placing restrictions on of protuberance.