CN202875975U - Needle guard - Google Patents
Needle guard Download PDFInfo
- Publication number
- CN202875975U CN202875975U CN2012202076340U CN201220207634U CN202875975U CN 202875975 U CN202875975 U CN 202875975U CN 2012202076340 U CN2012202076340 U CN 2012202076340U CN 201220207634 U CN201220207634 U CN 201220207634U CN 202875975 U CN202875975 U CN 202875975U
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- China
- Prior art keywords
- protection cover
- needle
- tip protection
- closed position
- mounting base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3216—Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3216—Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
- A61M5/3219—Semi-automatic repositioning of the cap, i.e. in which the repositioning of the cap to the needle covering position requires a deliberate action by the user to trigger the repositioning of the cap, e.g. manual release of spring-biased cap repositioning means
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a needle guard (100) which is used for protecting a needle head (210) so as to prevent the needle head from accidental contact. The needle guard comprises a needle head protection cover (110) loaded with a springand an installation base (140). The needle head protection cover (110) rotates from an opening position to a closing position in a pivot mode, wherein the needle head protection cover (110) is separated from the needle head (210) at the opening position, and at the closing position, the needle head (210) is enclosed in the needle head protection cover (110), and the needle head protection cover (110) protects the needle head (210). The space relationship between the installation base (140) and the needle head (210) is changeless. When the needle guard (100) is in use, the installation base (140) is movably connected to the needle head protection cover (110), and is used for starting movement between the opening position and the closing position. The needle head protection cover (110) has a passive state and an active state. When in the active state, the needle head protection cover (110) is used for being pushed towards the closing position. The utility model further discloses a manufacturing method of the needle guard (100) and a needle guard device including the needle guard (100).
Description
Technical field
The present invention relates to a kind of needle guard, thereby it avoids accidental contact for the protection of syringe needle.
Background technology
On the known ground of medical field, the hollow pinhead of clinical use point is to give liquor or suspension, for example medicament to people or animal.After thrusting skin and inserting needle point, typically be connected to the content of the syringe at syringe needle rear portion, be to inject to the human or animal by hollow needle.These hour hands are finished its task and are pulled out.The needle head structure of extracting of not protecting, however owing to may contaminatedly having serious health hazard, for example, be derived from the infective agent of patient blood or other body fluid, and needle point itself is easy to pierce through the ability of skin.Therefore, if process the medical personnel of the syringe needle extract unexpected with its touch they skin the corresponding disease of PI, for example acquired immune deficiency syndrome (AIDS) (HIV) or hepatitis.In order to evade or to reduce the health risk that this syringe needle of extracting that is mixed in other article brings, people have paid a large amount of effort to be devoted to develop various needle point protectors.
US5603699 discloses a kind of needle guard device, and it comprises a mounting base and a sheath device that is journaled on the mounting base.This sheath device comprises the protective cover member, bar member and starting drive.Starting drive is applicable to start sheath device and moves to the closed position from retracted position around syringe needle.The shortcoming of this needle guard device is structure that it is complicated and huge volume.What be associated with the former is large production cost and what be associated with the latter is the volume that has increased at least biology-hazardous waste.What for example be associated with multipart needle guard in addition, is higher production cost and the difficulty when it is assembled.
EP0887082 A2 has described its point that leans around nearly needle hub of a kind of protective cover and has pivoted.Injected and syringe needle from skin, extract after protective cover folding towards the syringe needle side.In order to ensure enough coupling mechanism forces, the protective cover of pivot has a latch hook mechanism, its when locking and needle hub closely cooperate, then need manually to push open the protective cover of pivot when opening again, and can overcome the resistance of latch hook mechanism.Because needed power is relatively high, therefore for example increased the risk that user can not the locking protective cover in the position of tensioning.Therefore protective cover can not be opened, and has then caused potential health risk.That is to say, needle point is unsafe until pivotal arm is promoted by manual relative needle shaft, and user still is easy to be stabbed/hurt the infection that brings before this.
Additional protective cover of the prior art has the structure with the structure similar of the protective cover of describing in EP0887082 A2; such as the protective cover that in US4982842, discloses; can comprise an additional latch hook mechanism; it is around the shaft locking of pin, or a latch hook mechanism that is used for around the shaft locking of pin is only arranged.In these examples, be sizable for the necessary power of impedance that overcomes latch hook mechanism equally.This power also can be applied on the pin.Therefore, syringe needle may be fractureed or from losing with the junction of needle hub.This can bring danger to user equally, because the needle sting that user may be fractureed/loses or incised wound.
Above-described needle guard all can not realize protecting immediately syringe needle extract syringe needle from skin after.Therefore, user still may touch needle point by accident extracting syringe needle and start by user in the interval between the needle guard.Be well known that, patient is often mobile in the administration process of pain, during for example by the syringe needle administration, namely when the content of the syringe that links to each other is injected into.This movement that is caused by patient therefore cause syringe needle be forced to extract, and make it be exposed to outer and can't protect and make it avoid accidental contact.In the middle of all accidents, the medical worker is subject to the injury that syringe needle brings in injection process in 20% to 25% accident according to estimates, and this occurs in the process of the content of actual injection syringe.
Be to occur in during the injection medicament and be because injection medicament is caused although have realized that the problem of accident between in the past 10 to 20 years, but still do not describe the automatic safety device of the injection needle that proposes and address this problem.
Therefore, need a kind of improved needle guard, be used for during for example injecting or automatic protection syringe needle after the injection.
Summary of the invention
Consider defects, the object of the present invention is to provide a kind of improved needle guard, it can automatically protect syringe needle immediately after syringe needle is extracted from patient's skin.
Another object of the present invention provides a kind of needle guard, and it can be installed on the syringe needle of various standards, perhaps is installed on the device that is comprised of standard needle and standard syringe.Another object of the present invention provides a kind of needle guard, and it can be produced in integrated mode.
These reach other purposes that occur in the following description, can avoid the needle guard of accidental contact to realize for the protection of syringe needle by a kind of now, comprise: a spring-loaded Tip protection cover, it is switched to the closed position from the enable possition, wherein separate with syringe needle at enable possition Tip protection cover, and enclose and the protection syringe needle at closed position Tip protection cover; With a mounting base, have constant spatial relationship between itself and the syringe needle, when needle guard was used, mounting base movably was connected to the Tip protection cover, and was used for starting between enable possition and closed position motion; Wherein the Tip protection cover has a passive state and an active state, and the Tip protection cover is for being promoted towards the closed position when being in active state.
According to a further aspect in the invention, needle guard can comprise the hinge arrangement that the Tip protection cover is connected to mounting base, and it is used for impelling the Tip protection cover to enter into any position of described enable possition or described closed position; Wherein hinge arrangement has dead-centre position; if by dead-centre position and arrive the closed position; the Tip protection cover that is in so passive state is forced from the primary importance to the enable possition by hinge arrangement; if by dead-centre position and arrive the enable possition, the Tip protection cover that is in so active state is then forced from the second position to the closed position by hinge arrangement.
According to a further aspect in the invention, hinge arrangement can comprise at least one knuckle joint and at least one tension member.This at least one knuckle joint and at least one tension member can be connected to the Tip protection cover and be connected to mounting base.
According to a further aspect in the invention, mounting base can comprise the needle hub hole, and it is used for the connecting needle interface, and syringe needle stretches out from needle hub.
According to a further aspect in the invention, mounting base can be one-body molded with needle hub, and syringe needle stretches out from needle hub, so mounting base and needle hub are the whole same sections that forms article.
According to a further aspect in the invention; when mounting base is connected to needle hub or when one-body molded with needle hub; wherein syringe needle stretches out from needle hub, and the position of described dead-centre position is: the angle between the longitudinal tensile strain section of the longitudinal tensile strain section of syringe needle and Tip protection cover is within 45 ° to 170 ° scope therein.
According on the other hand; needle guard may further include at least one latch members; it stretches out or consists of the part of Tip protection cover from the Tip protection cover; wherein at least one latch members can with the engagement of mounting base or arbitrary extension wherein or groove locking, when the Tip protection cover is in the closed position, be used for the Tip protection cover is latched in the closed position.
According on the other hand, latch members can comprise at least one crack, is used for allowing the Tip protection cover to use relatively few power and mounting base locking to mesh.
According on the other hand, needle guard may further include at least one unidirectional gate lever, and it stretches out and enter within the volume of being enclosed by the Tip protection cover from the Tip protection cover.When the Tip protection cover was in the closed position, unidirectional gate lever can mesh with syringe needle locking ground, so that the Tip protection cover is latched in the closed position.
According on the other hand, unidirectional gate lever can comprise at least one crack, is used for allowing the Tip protection cover to use relatively few power and syringe needle locking to mesh.
According on the other hand; Tip protection cover and mounting base or syringe needle locking are meshed needed power and are promoted the Tip protection cover towards the power of closed position under described active state less than working as; the power that is for example applied by hinge arrangement; when promoting the Tip protection cover to the closed position; by described power the Tip protection cover is latched in the closed position; wherein when being in active state the Tip protection cover be by described power towards the closed position, the power that is for example provided by hinge arrangement.
According on the other hand, needle guard can be used as the formation of Individual Items integral body during fabrication.
According on the other hand, needle guard can be by thermoplastic, and molding material or polymeric material are made.
According on the other hand, the manufacture method of needle guard can comprise molding or injection-molded thermoplastic, the step of molding material or polymeric material.
According on the other hand, needle guard device comprises needle guard, needle hub and syringe needle, and wherein needle guard is mounted on the needle hub or is one-body molded with needle hub.
According on the other hand, a kind of method for the manufacture of needle guard device is provided, comprise when mounting base has the needle hub hole the mounting base pressing or be adhesive in step on the needle hub, perhaps comprise when mounting base and needle hub are one-body molded, with the syringe needle pressing or be adhesive in step in the needle hub.
Other features of the present invention and embodiment are set forth in appending claims.
Description of drawings
These that the present invention has and other aspect, feature and advantage will be from following to more clear the explanation of nonrestrictive embodiment of the present invention and set forth clearly, and with reference to appended accompanying drawing, wherein
Fig. 1 is the side view of needle guard in the closed position according to an embodiment of the invention, this device is installed on the needle hub by mounting base, and has one by the syringe needle of unidirectional gate lever locking, syringe needle stretches out and extend into the inside of Tip protection cover from the far-end of needle hub, also have a syringe that is installed in the near-end of needle hub;
Fig. 2 is according to the needle guard among Fig. 1 that is in the enable possition of an embodiment;
Fig. 3 is the perspective view of needle guard in the closed position according to an embodiment of the invention, has an elongated slot in the Tip protection cover, and wherein syringe needle is all enclosed by the Tip protection cover except the part of most proximal end;
Fig. 4 is the side view of the elongated slot of needle guard according to an embodiment of the invention, wherein needle guard is in the closed position, it has two around the latch members of mounting base clamping, wherein mounting base has the surface on plane, and latch members can be slided on above-mentioned surface when moving into locked position of coupler;
Fig. 5 is according to one embodiment of present invention, the side view on the surface on the plane of the needle guard in Fig. 4;
Fig. 6 is according to one embodiment of present invention, and the view of the amplification of the needle guard in Fig. 4 shows the enlarged drawing of latch members, and it clamps around mounting base;
Fig. 7 is according to one embodiment of present invention, that needle guard among Fig. 6 is in the position between dead-centre position and the closed position, the hooked end of the far-end of latch members is shown, its surface with the plane of mounting base contacts, therefore it is compared with the same crack of needle guard among Fig. 4 and Fig. 6, and the crack among the figure is to enlarge a little.
Fig. 8 A, 8B, 8C and 8D are the viewgraph of cross-section of Tip protection cover in the closed position, syringe needle is enclosed in the inside of each Tip protection cover among each embodiment of illustrated elongated slot;
Fig. 9 is the viewgraph of cross-section with Tip protection cover of a unidirectional gate lever according to an embodiment of the invention, and wherein the gate lever extends internally and enters the inside of Tip protection cover, and has a crack that is close to junction point;
Figure 10 is the viewgraph of cross-section with Tip protection cover of two unidirectional gate levers according to an embodiment of the invention, wherein two gate levers extend internally respectively toward each other and enter the inside of Tip protection cover, and each gate lever all has a crack that is close to junction point;
Figure 11 be hinge arrangement according to an embodiment of the invention be sidelong large view to one, it comprises a knuckle joint, described knuckle joint comprises two shanks, interconnects in the elbow of knuckle joint, also comprises a tension member that is in the needle guard of closed position;
Figure 12 is according to embodiments of the invention, shows the hinge arrangement that needle guard in Figure 11 is in dead-centre position;
Figure 13 is according to embodiments of the invention, shows the hinge arrangement that needle guard in Figure 11 and Figure 12 is in the enable possition;
Figure 14 is that hinge arrangement according to an embodiment of the invention is sidelong large view to one, it comprises a knuckle joint, described knuckle joint comprises two shanks, its elbow at knuckle joint interconnects, the tension member that also comprises the V-type of a needle guard that is in the enable possition has pressing member at the V point of the far-end of V-type tension member;
Figure 15 is the mounting base of a basic embodiment, and the side view of hinge arrangement and part Tip protection cover, Tip protection cover have a latch members that clamps around mounting base in the closed position;
Figure 16 is the view that amplifies according to the side direction of the elongated slot of the Tip protection cover of an embodiment, and the Tip protection cover has the crack protector, and the crack of unidirectional gate lever wherein is not so that groove can produce with syringe needle contact;
With
Figure 17 is the top view of the needle guard according to an embodiment when being in the enable possition, shows the needle hub hole with four grooves, when needle hub is installed within it and the corresponding protuberance of needle hub closely cooperate.
The specific embodiment
The embodiment that present invention is described in more detail below with reference to the accompanying drawings is can implement the present invention for those skilled in the art.Yet the present invention can be showed with multiple different form, and should not be construed as the embodiment that only limits to set forth here.More properly, these embodiment that provide are for disclosed content can be more thorough and complete, and express scope of the present invention fully to those skilled in the art.Embodiment and unrestricted the present invention, scope of the present invention only limits by appended claim.In addition, the term that uses in the detailed description in specific embodiment shown in the drawings is not to be intended to as limitation of the present invention yet.
Below, 1-17 illustrates embodiments of the invention with reference to accompanying drawing.All parts in the accompanying drawing can be with reference to obtaining according to numeral corresponding in the following table.
Needle guard 100 consists essentially of unique, novelty, creationary and favourable combination comprises spring-loaded Tip protection cover 110, mounting base 140 and for the device that Tip protection cover 110 is connected on the mounting base 140.Tip protection cover 110, it can have the shape of bar or have the shape of arbitrary other elongations, is to pivot actively from the enable possition to the closed position with respect to mounting base 140.When needle guard used, mounting base 140 was inactive with respect to syringe needle 210, and namely it is to have constant spatial relationship with respect to syringe needle 210.Tip protection cover 110 is connected to mounting base 140 by the device of activity, can pivot around this device Tip protection cover 110.The device of this activity for connecting can be the device of hinge arrangement 120 or arbitrary other activities for connecting known in the prior art.The device that is used for the activity of connection may further include or closely navigate to elastic part, for example spring or tension member 124.When the safety device of needle guard 100 is triggered by user; namely; when Tip protection cover 110 is to return to active state, try hard to recommend moving Tip protection cover 110 to the closed position by what elastic part applied, be for enclosing and protection syringe needle 210 at this position Tip protection cover 110.And at corresponding passive state, elastic part can or can promote the Tip protection cover to the enable possition, separates with syringe needle 210 at this position Tip protection cover 110.In the enable possition, and typically under passive state, syringe needle 210 can be used to for example inject medicament.
When the motion of Tip protection cover 110 typically occurs in by the dead-centre position of hinge arrangement 120.User starts safety device, namely is transformed into active state from passive state, can finish towards the movement of closed position by Tip protection cover 110, and this only passes through dead-centre position.Mounting base 140 be set to be used to be connected to or with needle hub 220 combinations, typically, be the needle hub-needle apparatus of standard.Can cause like this needle guard can be applied to easily various medications, for example, pharmaceutical drugs, the perhaps medication of the injector delivery toxic component by being connected to syringe needle 210.In the enable possition, Tip protection cover 110 is far away with respect to the position of syringe needle 210, and therefore, the latter can be used as, for example, extract liquid preparation out and enter in the syringe that is connected to syringe needle 210, and with drug injection to patient.In the closed position, Tip protection cover 110 be around or enclose syringe needle 210, to reach the degree that can not bring the accidental contact of user.User can be manual the security function of startup needle guard 100, the part by connecting in addition directly or indirectly, mobile Tip protection cover 110 is from the enable possition to the closed position and only pass through dead-centre position.Then Tip protection cover 110 enters the closed position, or is in active state, and when hindering without any foreign object, for example therefore patient's outer surface can also protect syringe needle 210 to avoid accidental contact from wherein automatically entering the closed position.Preferably, needle guard 100 also comprises blocking mechanism, and its locking Tip protection cover 110 makes it can not get back to the enable possition on the closed position, perhaps gets back to the enable possition and has very large difficulty.The power that applies by hinge arrangement 120 can with the blocking mechanism combined effect of needle guard 100, therefore Tip protection cover 110 is latched in the closed position and is not needed to apply any external force.Needle guard has blocking mechanism in an embodiment, and hinge arrangement 120 is preferably to arrange, and the blocking mechanism locking Tip protection cover 110 that the power that therefore forces Tip protection cover 110 to enter the closed position is greater than needle guard 100 is needed power in the closed position.The blocking mechanism of needle guard 100 can comprise one or more latch members 132 or one or more unidirectional gate lever 130, or arbitrarily other suitable blocking mechanisms well known in the prior art.The blocking mechanism of needle guard 100 can comprise one or more latch members 132 and the one or more unidirectional gate lever 130 of combination with it simultaneously, in addition or with the arbitrarily combination of other suitable blocking mechanisms well known in the prior art.It is according to following three step programs that user typically uses the needle guard device that comprises needle guard 100; take following pharmaceutical drugs as example: (i) when user uses syringe needle 210 to thrust patient's skin; Tip protection cover 110 is in the enable possition; (ii) user starts security function by manual mobile Tip protection cover 110 by dead-centre position; therefore Tip protection cover 110 is to be in active state also can contact with patient's skin; (iii) user injects medicament by syringe needle 210; (iv) user is extracted syringe needle 210 from patient's skin, and Tip protection cover 110 automatically enters the closed position with protection syringe needle 210 whereby.
Needle guard 100 of the present invention can automatically not need to apply any additional action by user, at syringe needle after patient's skin is extracted, immediately for the protection of syringe needle 210.This be needle guard 100 of the present invention for one of syringe needle 210 very superior feature, if during step I ii from patient's skin, the deviating from of syringe needle chance, this will bring and expose and therefore cause huge health hazard.Similar Tip protection system can not start in device automatically in the prior art, and it need to be by user's manual starting after step I ii.
According to an embodiment, at the rear side of Tip protection cover 110, namely a side opposite with elongated slot 115 sides can provide one or more parts to come for the manual movement that promotes towards the closed position.For example, Tip protection cover 110 can have the prolongation that a user can get at by finger.Part surface or all surfaces are coarse or have the analog such as fin, and it can increase the frictional force between surface and the finger upper end.
According to an embodiment, Tip protection cover 110 can have one or more cracks protector 116, and it is used for arranging therein one or more unidirectional gate levers.This groove has inner volume, and it can extend and be substantially perpendicular to the extension of Tip protection cover 110.One or more cracks 131 of one or several unidirectional gate levers are that to be positioned at the volume of crack protector 116 inner.Crack 131 is preferably located in the outside on the plane, path of syringe needle 210, and it moves to the closed position from the enable possition.The advantage of one or several crack protectors 116 comprises, for example, reduces or eliminates syringe needle 210 and is stuck in risk on the crack 131.
According to an embodiment, in the front side of Tip protection cover 110, namely a side identical with elongated slot 115 sides can provide one or more parts to come for the motion that promotes on skin.Therefore for example, it can be crooked, when moving to the closed position and for example extract syringe needle 210 out after injecting, does not have seamed edge to touch skin.Its surface is arranged so that preferably the frictional force between surface and skin reduces.For example, it can be polished or be made by the material of low-friction coefficient preferably.Its advantage comprises the risk minimization that the release mechanism of needle tip guard 100 breaks down.
According to an embodiment, needle hub hole 141 can be conical hole, and its diameter narrows down in the direction identical with the extension of syringe needle 210.
According to an embodiment, needle hub hole 141 has corresponding longitudinal fluting, and it matches with vertical extension of standard needle interface 220.Needle hub hole 141 can have, for example, and 2 to 5 grooves, or 3 to 4, or 4 grooves.
According to an embodiment, mounting base 140 is connected to needle hub 220 reliably by compressing the mode of mounting base 140 on needle hub 220.For example, thus needle hub 220 is assemblied in the needle hub hole 141 of mounting base 140 reliably.The advantage of compression fit mounting base 140 comprises comparing with other connecting devices and has reduced production cost.
According to an embodiment, mounting base 140 can be installed on the needle hub 220 reliably by gluing mode.For example, needle hub 220 can be glued on the needle hub hole 141 of mounting base 140.
According to an embodiment, mounting base 140 can be installed on the needle hub 220 reliably by the mode of welding.
According to an embodiment, mounting base 140 can be wholely set with needle hub 220.Therefore mounting base 140 and needle hub 220 become the identical part of the whole product that consists of.Syringe needle 210 can compactedly be installed to or be glued to the needle hub part of the product of this mounting base 140 and needle hub 220 one.
The stop turn over function of hinge arrangement 120 be so that it can impose on 110 1 power of Tip protection cover, can turn to two on the contrary-any one of the position that arranges, i.e. enable possition or closed position.In the closed position, syringe needle 210 is by 110 protections of Tip protection cover.In the enable possition, syringe needle 210 is the skin that exposes and can be used for thrusting patient.When applying a large opposite external force; for example impose on the power of Tip protection cover 110 or any extension wherein by user; its direction is from the enable possition to the dead-centre position; the closed Tip protection cover of hinge arrangement 120 110 is to the closed position; unless by an external object for example patient's skin or clothes hinder, and pass through dead-centre position after this.
The stop turn over function of the hinge arrangement 120 of foregoing description can realize by multiple device, the mechanism of spring-loaded hinge or other " rapid closings " for example, and these are known in the art.
Hinge arrangement 120 can comprise one or more knuckle joints 121 and one or more tension member 124.Therefore the stop turn over function of hinge arrangement 120 can be realized.One or more knuckle joints 121 can be connected to gap the relevant portion near Tip protection cover 110 and mounting base 140.Each knuckle joint 121 can preferably be made of two relative rigidity shanks 122, jointly connects in their end, and has in a longitudinal direction knuckle joint elbow 123.Knuckle joint elbow 123 can be that flexible therefore shank 122 can move relative to each other, and allows Tip protection cover 110 to move between closed position and enable possition.One or more tension members 124 can elastic stretching, extensions or are extended to the quantity of a restriction.When stretching or enlarge, tension member 124 be elongate and make every effort to keep its original shorter length.Therefore, tension member 124 stretching, extension or that enlarge can apply the power with the direction of opposite direction that stretch or expansion.Tension member 124 at the junction point of Tip protection cover 110 preferably on the top of the junction point of corresponding knuckle joint 121.The junction point of tension member 124 on mounting base 140 preferably is lower than the junction point of corresponding knuckle joint 121.Tension member 124 preferably is installed in and is close to corresponding knuckle joint 121, to such an extent as to but preferably and keep clear of arbitrary part that can touch the latter, otherwise the function of the expection of hinge arrangement 120 then is compromised.The position of the fulcrum of hinge arrangement 120 is corresponding to specific angle, and the stop angle is between the longitudinal tensile strain section of the longitudinal tensile strain section of syringe needle 210 and Tip protection cover 110.If the angle between the longitudinal tensile strain section of the longitudinal tensile strain section of syringe needle 210 and Tip protection cover 110 is less than the stop angle, Tip protection cover 110 is stressed with respect to the closed position.If this angle is greater than the stop angle, 110 on Tip protection cover is stressed with respect to the enable possition.The stop angle can be in the scope between 45 ° to 170 °, for example 80 ° to 120 ° or 90 ° to 110 °.Those skilled in the art can be easy to arrange hinge arrangement 120 to obtain needed stop angle.For example, increase shank 122 and can cause the increase at stop angle, and the junction point of mobile tensile member 124 can cause reducing of stop angle to the more top of the junction point of corresponding knuckle joint 121.
According to an embodiment, hinge arrangement 120 can comprise at least one, for example hinge and at least one, for example a spring.
According to an embodiment, hinge arrangement 120 can comprise a knuckle joint 121 and a tension member 124, and it can be arranged on close position.
According to an embodiment, hinge arrangement 120 can comprise two knuckle joints 121 and a tension member 124, and it can be arranged on close position.Tension member 124 can be arranged between two knuckle joints 121.
According to an embodiment, hinge arrangement 120 can comprise a tension member 124, and it is V-structure and stretches out, and therefore can easily exert pressure by user.Its top namely on the V of V-type tension member 124 point, can have extruded member 125 or comprise the shape of extruded member 125.Thereby user can start release mechanism easily by the extruded member 125 that compresses tension member 124 or wherein have, and for example uses the finger of the identical hands that grips syringe.As known in the art, extruded member 125 is to be set to can be easy to be touched by user, and compresses with finger.Its outer surface, namely user is exerted pressure, and can be the plane or protruding a little or recessed.It can have the short or high extension on the direction of the extension that is substantially perpendicular to Tip protection cover 110.When user promoted extruded member 125, this low or high extension had reduced the risk that finger slides in extruded member 125.
Blocking mechanism
The blocking mechanism of needle guard 100 guarantees that Tip protection cover 110 is in the closed position and make it can not be back to the enable possition, or wherein syringe needle 210 is in arbitrary other positions of exposure.Preferably, blocking mechanism automatically starts when Tip protection cover 110 enters the closed position.The power that is provided by hinge arrangement 120 when mobile Tip protection cover 110 enters the closed position, kinetic energy or momentum can enough start blocking mechanism.For example, blocking mechanism can be a part or the extension of Tip protection cover 110.It also can be the groove in Tip protection cover 110, and for example close-fitting mounting base 140 in the closed position is connected with corresponding extension.When blocking mechanism started, Tip protection cover 110 was mechanically connected to by blocking mechanism, and for example, syringe needle 110 is on needle hub 220 or the mounting base 140.Mounting base 140 can have feature or the member of the locking that can start or actuate blocking mechanism, and this is known in the art.Mounting base can, for example have the surface on plane and have an edge, when moving to the closed position, latch members 132 is slided and in the above around the mounting base locking.It for example can also have a groove or analog, when locking and the part of latch members 132 closely cooperate.
According to an embodiment, blocking mechanism can comprise one or more, such as two latch members 132, stretches out or form the part of Tip protection cover 110 from Tip protection cover 110.Latch members 132 can be the hook that the extension of Tip protection cover 110 forms.When in the motion of closed position during with first contact of mounting base 140, hook can be elastic outwardly-bent from its resting state.When entering into the closed position, the part of latch members 132 such as the hook end of end, can rapid closing enters into the corresponding groove of mounting base 140, perhaps around the edge of mounting base 140, thereby Tip protection cover 110 is locked in the closed position.
According to an embodiment, blocking mechanism can comprise one or more, one or two latch members 132 for example, and it has one or more cracks 131.This crack 131 can be positioned at the side of latch members 132, and it is towards mounting base 140 when Tip protection cover 110 is in the closed position.Crack 131 can be the otch that passes the part of latch members 132, for example 10% to 95% or 25% to 75%, and its direction is substantially perpendicular to the longitudinal tensile strain section of latch members.It can be positioned near latch members 132 junction point to Tip protection cover 110, for example be the latch members 132 that begins from junction point longitudinal tensile strain section total length 0 to 60% or 0 to 40%.Crack 131 also can be the otch that passes the part of Tip protection cover 110, and this part is close to the junction point of latch members 132.The degree of depth in this crack 131 or extension can be equal to or greater than the width of latch members 132.The advantage in one or more cracks 131 comprises, for example, reduced mobile Tip protection cover 110 to the closed position needed power.When having one or more crack 131, latch members 132 can be easier outwardly-bent from its resting state when it touches mounting base for the first time.By the power that is for example provided by hinge arrangement 120, do not realize the automatically actuated risk of blocking mechanism, thereby reduce to minimum.
According to an embodiment, blocking mechanism can comprise one or more, for example one or two, unidirectional gate lever 130.This gate lever may be to stretch out from Tip protection cover 110 inside and in Tip protection cover 110 inside.Therefore, this gate lever can extend in the volume of being enclosed by Tip protection cover 110, for example, and on the plane of the longitudinal tensile strain section that is substantially perpendicular to Tip protection cover 110.The longitudinal tensile strain section of unidirectional gate lever 130 can be on the direction of elongated slot 115 with respect to the inside of Tip protection cover 110.Angle between the plane of the movement locus between unidirectional gate lever 130 longitudinal tensile strain sections and syringe needle 210 are from the enable position to the closed position therefore can be for for example, and 20 ° to 85 °, 30 ° to 80 ° or 40 ° to 75 °.When the Tip protection cover moves to the closed position, be on a point thereby syringe needle 210 touches unidirectional gate lever 130 at first, unidirectional gate lever is to inner inclination therein.Preferably; unidirectional gate lever 130 is set to allow the axle of syringe needle 210 easily to enter; and enter around the shaft seal of syringe needle 210, but stop syringe needle 210 to be back to arbitrary position, this position is that syringe needle 210 is not to be included within the internal capacity of Tip protection cover 110.The action that during starts occurs at blocking mechanism comprises: the gate lever 130 that at least one is unidirectional, when Tip protection cover 110 when move the closed position, can be: (i) axle of syringe needle 210 contacts at the lip-deep point of unidirectional gate lever 130, and it is towards elongated slot 115; Thereby it is outwards flexibly crooked that (ii) unidirectional gate lever 130 is subject to the power that the axle by syringe needle applies, so axle inwardly slides on intilted inclined-plane; (iii) axle arrives the top of unidirectional gate lever 130, and the elastic initial configuration that is returned to it, i.e. its release conditions, and syringe needle 210 is enclosed in the Tip protection cover 110.Be in far-end under its relaxed state and another unidirectional gate lever 130 that is oppositely arranged at unidirectional gate lever 130 and be in distance between the far-end under its relaxed state; or unidirectional gate lever 130 is in the distance between the inner surface of far-end under its relaxed state and Tip protection cover 110, preferably less than the diameter of the axle of syringe needle 210.
According to an embodiment, blocking mechanism can comprise one or more, and for example one or two has the unidirectional gate lever 130 in or several cracks 131.When unidirectional gate lever moved towards the closed position, this crack 131 preferably was positioned at unidirectional gate lever 130 towards a side of syringe needle 210.Crack 131 can be positioned at along the optional position of the extension of unidirectional gate lever 130, from its with the junction point of Tip protection cover 110 to the point that when syringe needle 210 moves to the closed position, contacts for the first time with unidirectional gate lever 130.Therefore crack 131 can be positioned on the gate lever, so that the point that syringe needle 210 and crack are enclosed Tip protection cover 110 inside to gate lever wherein with syringe needle from its contact point that has at first the gate lever never contacts.Crack 131 can be the otch that passes the part of unidirectional gate lever 130, for example 10% to 95% or 25% to 75%, and its direction is substantially perpendicular to the longitudinal tensile strain section of unidirectional gate lever.It can be positioned near the junction point of unidirectional gate lever 130 with Tip protection cover 110, for example be the unidirectional gate lever 130 that begins from junction point longitudinal tensile strain section total length 0 to 50% or 0 to 40%.The advantage in one or more cracks 131 comprises, for example, reduced mobile Tip protection cover 110 to the closed position needed power.When having one or more crack 131, unidirectional gate lever 130 can be easier outwardly-bent from its resting state when it touches syringe needle 210 for the first time.By the power that is for example provided by hinge arrangement 120, do not realize the automatically actuated risk of blocking mechanism, thereby reduce to minimum.
According to an embodiment, blocking mechanism can comprise one or more, one or two unidirectional gate lever 130 for example, and stretch out its identical inboard from Tip protection cover 110, and towards another opposite inboard of Tip protection cover 110.
According to an embodiment, blocking mechanism can comprise one or more, for example one or two, the unidirectional gate lever 130 that arranges in pairs.Every a pair of unidirectional gate lever 130 can stretch out toward each other from the opposite inboard of Tip protection cover 110.Two far-ends can contact each other under relaxed state, perhaps under relaxed state the distance between two ends preferably less than the diameter of syringe needle 210.
Material and manufacturing
Needle guard 100, or independent part wherein can be made by suitable material, for example, and thermoplastic, plastic material or polymeric material.Suitable material is for realizing at hinge arrangement 120, unidirectional gate lever 130 or the intrinsic strain in the latch members 132, and this is known in the art.The example of the material that this is suitable comprises, but is not limited to polypropylene (PP), high density polyethylene (HDPE) (HDPE), polyamide (PA) and acrylonitrile-butadiene-styrene copolymer (ABS).Preferably, selection be polypropylene (PP) material, this considers that needle guard 100 is that the single article that consist of are as a whole made.Preferably, the mixing that thermoplastic, plastic material or polymeric material can be suitable, for the purpose of its expection, such as toughness, rigidity, fatigue resistance, elasticity, and improvement in creep resistance.Select suitable thermoplastic, plastic material or polymeric material are easily to realize for a person skilled in the art.Those skilled in the art also can carry out standard test with in order to screen thermoplastic, the scope of plastics or polymeric material, and can select suitable material according to the result of this experiment.Needle guard of the present invention, or needle guard device comprises needle guard 100, its manufacture process comprises one or more steps, it is comprised of one group of following step: prepare thermoplastic, plastic material or polymeric material are as the raw material that is used for needle guard 100; Thermoplastic, integrated needle guard 100 of plastic material or polymeric material molding or injection-molded formation, it can comprise or not comprise needle hub 220; And Tip protection cover 100 will be installed be installed on the needle hub 220 or be installed on the syringe needle 210 in the needle hub 220, for example, be installed to mounting base on the needle hub 220 or syringe needle 210 be installed to needle hub 220 by pressing or gluing mode.
According to an embodiment, as known in the art, needle guard 100 is by thermoplastic, and plastic material or polymeric material are made.Use thermoplastic, the advantage of plastic material or polymeric material is, for the structure of needle guard 100, compares with metal material, and the distortion of all parts that it is identical has larger degree of freedom.For example, the needle guard 100 made of plastic material is more molded than being more convenient for of making of corresponding metal material.Another advantage comprises that the coloud coding of the needle guard 100 of plastic material becomes possibility, for example encodes according to the size of syringe needle.Another advantage is that the needle guard 100 of plastic material or polymeric material is compared with metal material, with respect to for example corrosivity, has higher chemical inertness and/or resistance.Needle guard 100 of the present invention, needle guard such as plastic material or polymeric material, its another advantage is, it can molding and is made as a functional device, and the assembly that namely needn't be as other corresponding device of the prior art surpasses one separation by combination is assembled.Therefore, consequently reduced production cost.
At claims, term " comprises/comprise " does not get rid of member or the step that has other.In addition, although listed separately, multiple device, member or method step can be implemented by discrete component or blood processor.In addition, although single feature can be included in the different claim, they can be combined easily, and to be included in the combination that does not represent these features in the different claim be infeasible and/or unhelpful.In addition, single Reference numeral is not got rid of and is had a plurality of structures.Term " one ", " one ", " first ", " second " etc. do not get rid of a plurality of yet.Reference numeral in the claim is only as the example of clearness, and should not regard any restriction to the claim protection domain as.
Claims (11)
1. a needle guard (100), its for the protection of syringe needle (210) thus avoid accidental contact, it is characterized in that, it comprises:
A spring-loaded Tip protection cover (110), it is switched to the closed position from the enable possition, wherein described Tip protection cover (110) separates with described syringe needle (210) in the enable possition, and described syringe needle (210) is enclosed and protected to described Tip protection cover (110) in the closed position;
A mounting base (140), has constant spatial relationship between itself and the described syringe needle (210), when described needle guard (100) when being used, described mounting base (140) movably is connected to described Tip protection cover (110), and is used for starting between described enable possition and described closed position motion; With
A hinge arrangement (120), it connects described Tip protection cover (110) to described mounting base (140), and be used for impelling described Tip protection cover (110) to enter into any position of described enable possition or described closed position, described hinge arrangement (120) comprises at least one knuckle joint (121) and at least one tension member (124), and described at least one knuckle joint (121) and at least one tension member (124) are connected to described Tip protection cover (110) and are connected to described mounting base (140);
Wherein
Described Tip protection cover (110) has a passive state and an active state, and described Tip protection cover (110) is for being promoted towards described closed position when in active state,
Described hinge arrangement (120) has dead-centre position; if arrive described closed position by described dead-centre position; the described Tip protection cover (110) that is in so described passive state is forced from primary importance to described enable possition by described hinge arrangement (120); if arrive described enable possition by described dead-centre position; the Tip protection cover that is in so described active state is then forced from the second position to described closed position by described hinge arrangement (120), and
When described mounting base (140) is connected to needle hub (220) or when one-body molded with needle hub (220); wherein said syringe needle (210) stretches out from needle hub, and the position of described dead-centre position is: the angle between the longitudinal tensile strain section of the longitudinal tensile strain section of described syringe needle (210) and described Tip protection cover (110) is within 45 ° to 170 ° scope therein.
2. according at each described needle guard (100) of front claim, described mounting base (140) comprises needle hub hole (141), and it is used for connecting needle interface (220), and described syringe needle (210) stretches out from needle hub (220).
3. needle guard according to claim 1 (100), wherein said mounting base (140) is one-body molded with described needle hub (220), described syringe needle (100) stretches out from needle hub (220), and therefore described mounting base (140) and described needle hub (220) are the same sections of the whole article that consist of.
4. according at each described needle guard (100) of front claim; further comprise at least one latch members (132); stretch out or consist of the part of described Tip protection cover (110) from described Tip protection cover (110); wherein said at least one latch members (132) can with the engagement of described mounting base (14) or arbitrary extension wherein or groove locking; when described Tip protection cover (110) when being in described closed position, be used for described Tip protection cover (110) is latched in described closed position.
5. needle guard according to claim 4 (100); wherein said latch members (132) comprises at least one crack (131), is used for allowing described Tip protection cover (110) to use relatively few power and the engagement of described mounting base (140) locking ground.
6. according to claim 1,2,3 or 5 each described needle guards (100); further comprise at least one unidirectional seal apron (130); stretch out and enter within the volume of being enclosed by described Tip protection cover (110) from described Tip protection cover (110); when described Tip protection cover (110) when being in described closed position; described unidirectional gate lever (130) and the engagement of described syringe needle (210) locking ground are to be latched in described closed position with described Tip protection cover (110).
7. needle guard according to claim 6 (100); wherein said unidirectional seal apron (130) comprises at least one crack (131), is used for allowing described Tip protection cover (110) to use relatively few power and the engagement of described syringe needle (210) locking ground.
8. according to claim 5 or 7 described needle guards (100); described Tip protection cover (110) meshes needed power less than promoting described Tip protection cover (110) towards the power of described closed position under described active state with described mounting base (140) or described syringe needle (210) locking ground; and be used for allowing by this power described Tip protection cover to be latched in described closed position, this power is to be used for promoting described Tip protection cover (110) towards the power of described closed position under described active state.
9. according to claim 1,2,3,5 or 7 each described needle guards (100), be to form as Individual Items are whole during fabrication.
10. according to claim 1,2,3,5 or 7 each described needle guards (100), be by thermoplastic, plastic material or polymeric material are made.
11. needle guard device, it is characterized in that, comprise one according to claim 1 to 10 each described needle guards (100), it is upper or one-body molded with described needle hub (220) that a needle hub (220) and a syringe needle (210), wherein said needle guard (100) are installed in described needle hub (220).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161504560P | 2011-07-05 | 2011-07-05 | |
| US61/504,560 | 2011-07-05 | ||
| SE1150633-4 | 2011-07-05 | ||
| SE1150633A SE535965C2 (en) | 2011-07-05 | 2011-07-05 | Needle protection with a dead position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202875975U true CN202875975U (en) | 2013-04-17 |
Family
ID=47623751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202076340U Expired - Lifetime CN202875975U (en) | 2011-07-05 | 2012-05-09 | Needle guard |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN202875975U (en) |
| SE (1) | SE535965C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9642989B2 (en) | 2009-08-13 | 2017-05-09 | Vigmed Ab | Catheter needle tip shielding device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE535169C2 (en) | 2010-04-13 | 2012-05-08 | Vigmed Ab | Polymer protective device for a catheter needle tip |
| CN103209726B (en) | 2010-09-23 | 2016-05-11 | 威格米德公司 | Needle tip guard |
| SE1350137A1 (en) | 2013-02-05 | 2014-08-06 | Vigmed Ab | needle device |
| EP3316945B1 (en) | 2015-06-30 | 2024-04-17 | Greiner Bio-One GmbH | Needle guard with dual hinge functionality |
-
2011
- 2011-07-05 SE SE1150633A patent/SE535965C2/en unknown
-
2012
- 2012-05-09 CN CN2012202076340U patent/CN202875975U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9642989B2 (en) | 2009-08-13 | 2017-05-09 | Vigmed Ab | Catheter needle tip shielding device |
Also Published As
| Publication number | Publication date |
|---|---|
| SE535965C2 (en) | 2013-03-12 |
| SE1150633A1 (en) | 2013-01-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
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| CX01 | Expiry of patent term | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220523 Address after: Barkhale street, Minster, Krems, Austria Patentee after: Grena first Biochemical Co.,Ltd. Address before: Helsingborg Patentee before: VIGMED AB |
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| TR01 | Transfer of patent right |