CN1355716A

CN1355716A - Needle point guard safety cap assembly

Info

Publication number: CN1355716A
Application number: CN98814250.3A
Authority: CN
Inventors: L·R·科赫; E·E·埃尔森
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-09-23
Filing date: 1998-09-23
Publication date: 2002-06-26
Anticipated expiration: 2018-09-23
Also published as: CN1193804C; AU9777598A; WO2000016832A1

Abstract

Embodiments of a needle point guard safety cap assembly are disclosed, having a needle point cover coupled to an extensible frame, which in turn is coupled to a needle hub engaging member. Prior to use the needle shaft passes entirely through the needle point cover; after use, the extensible frame is urged by the user, causing the cover to slide down the needle shaft until the needle point is retained within the cover. The needle point guard safety cap assembly may be integrally formed of a resilient plastic material.

Description

Needle point guard safety cap assembly

FIELD OF THE INVENTION

The present invention relates to the syringe needle of hypodermic syringe, the syringe needle that The present invention be more particularly directed to hypodermic syringe covers the needle point of syringe needle to prevent the unexpected people's of bundle device when using post processing.

The background of invention

Now, the disposable hypodermic syringe syringe needle has become inalienable part in the health care.Common hypodermic needle comprises a removable plastics needle guard, and this needle guard removes before use, and replaces before processing again.This behavior that the pin medicated cap is put back to makes has the possibility of being stabbed by the syringe needle accident with person, common corpsman,hospital or medical personnel.Stabbed by the pin accident and may make disease pass the first line of defence of human body---skin.Since some diseases such as HIV be at present can not cure and the most at last the people cause death, therefore used needle point is come out and needle guard of every replacing all can constitute potential threat to life.Although this problem had appearred in existing equipment, also there is not a kind of cost-effective equipment up to now.

Summary of the invention

The invention provides a kind of needle point guard safety cap assembly, it is used for the needle point of syringe is covered safely and protects after syringe uses.This assembly preferably includes: a top cover, and it adopts the shape of the hollow part of elongation, and an end of these parts is used for syringe needle is received in wherein for the opening shape, and the other end almost by end wall sealing, has a hole on the end wall, and syringe needle can pass from this hole; Usually also have the opening sealing of a lid with top cover, a hole that can allow syringe needle therefrom pass is arranged on the lid, like this, syringe needle just can pass the hole of lid and the hole on the tegmental wall.

When using injector to inject, needle point must stretch out from the hole of end wall.Thereby a manual extending framework can be connected on the top cover when preparing to handle syringe, move top cover along syringe needle.

Can handle syringe after the injection, at this moment top cover be slided into the position that its end wall exceeds the needle point summit.Top cover is supported by the hole on the lid and enters a protection position around the rotation of lid hole up to the inboard that needle point passes the top cover end wall of sealing then, and needle point can not pass the hole on the top cover on this position.

Used a plurality of parts to come to provide the feedback information pointer pinnacle lid of sense of touch and audition successfully to launch in the needle point cap assembly to the user.At extending framework during from non-effect position beginning centering, the door bolt arm spare that is used for limiting framework before use " snaps in " slit on the framework; When framework launches fully, the projection on the framework will be stuck on the shank periphery.This sense of touch and feedback information acoustically for the user provide syringe needle safe, no longer need pin is carried out the assurance of visual inspection.

Door bolt arm and slit except providing the tactile feedback information to the user, can also guarantee when beginning to launch needle housings that user's finger has enough strength to finish installation.When lever arm was pulled out slit, in order to overcome the resistance of lever arm, the user must provide enough strength to extending framework, like this, when lever arm leaves slit, launched to finish in one direction, and the user does not need extra attention.

If needle guard does not suitably limit in some way, so because the user adds the problem of force direction to needle guard, just might make needle guard be pushed away hypodermic syringe fully, therefore in the preferred embodiment, needle guard has adopted annular ring corresponding on a narrow annular slot and the hypodermic syringe to mesh.Under some occasion, guarantee that it also is an a matter of great account that hypodermic syringe top ferrule openings is positioned at suitable direction, so preferred embodiment also can add rib corresponding on an elongated slot and the hypodermic syringe and meshes.At this moment, needle guard just can provide the additional indication of a sleeve pipe direction.

Preferred embodiment is to adopt the integrally formed form of elastoplast, thereby makes processing more economical.

Brief Description Of Drawings

Fig. 1 is the perspective view of needle point guard safety cap assembly preferred embodiment one side of the present invention;

Fig. 2 is the turn over perspective view of a side of embodiment among Fig. 1;

Fig. 3 is along the cross-sectional view at 3-3 place among Fig. 1;

Fig. 4 is a needle point guard safety cap assembly when preparing to be connected with syringe, the cross-sectional view at 3-3 place among Fig. 1;

Fig. 5 is the cross-sectional view of preferred embodiment among Fig. 1, and it has showed that needle point guard safety cap assembly is contained in the appearance on the syringe;

Fig. 6 is the cross-sectional view of preferred embodiment among Fig. 1, and it has showed that needle point guard safety cap assembly is contained on the syringe, the appearance that the while needle guard covers pin;

Fig. 7 is the cross-sectional view of preferred embodiment among Fig. 1, and it has showed that needle point guard safety cap assembly is contained on the syringe, removes needle guard, and syringe is prepared the appearance of injection;

Fig. 8 is the cross-sectional view of preferred embodiment among Fig. 1, and it has showed that needle point guard safety cap assembly is contained in the appearance on the syringe, has shown also how the user drives cap assembly to cover the appearance of needle point;

Fig. 9 is the cross-sectional view of preferred embodiment among Fig. 1, and it has showed that needle point guard safety cap assembly is contained in the appearance on the syringe, has also described the appearance of using back needle point medicated cap rotation to cover needle point and being fixed on the protection position;

Figure 10 be among Fig. 9 along the cross-sectional view at 10-10 place, it has showed when protecting the clip that needle point guard safety cap is fixed on the syringe needle.

Figure 11 is the perspective view of another embodiment one side of needle point guard safety cap assembly;

Figure 12 is the turn over perspective view of a side of embodiment among Figure 11;

Figure 13 is along the cross-sectional view at 13-13 place among Figure 11;

Figure 14 is the needle point guard safety cap assembly of another embodiment when preparing to be connected with syringe, among Figure 11 along the cross-sectional view at 13-13 place;

Figure 15 is the cross-sectional view of another embodiment shown in Figure 11, and it has showed that needle point is connected the appearance on the syringe;

Figure 16 is the cross-sectional view of another embodiment of Figure 11, and it has showed that needle point guard safety cap assembly is contained on the syringe and the appearance of needle guard when pin is covered.

Describe in detail

After adopting needle point guard safety cap assembly of the present invention, just can eliminate pin at all and use rear meaning Outer bundle people's thing. In order to prevent the unexpected people of bundle, the present invention adopts lid, cap or a cup shell Cover needle point or needle point is received in one after use and protect in the position.

A hole is arranged on the top cover of needle point, like this top cover can be before injection along syringe needle slide into away from The punctured bit of needle point slides back to along syringe needle after injection again and covers needle point. As long as needle point one injection Complete and get back in the top cover, just with the top cover rotation or reverse, needle point just can not be from top cover like this Come up again in the hole. The termination of top cover forms a cavity volume, and the end with fixed needle prevents pin Come up again in the hole of passing in the end wall.

The needle point top cover is usually designed to the structure that can join with general needle guard, like this, and needle point guard Safety cap assembly is installed and syringe needle installs before selling at needle guard. So when selling syringe needle, pin The pinnacle lid has been reduced to away from the position needle guard of needle point then with common form needle guard to be lived.

In the process of preparing injection, needle guard is removed, then just can be with syringe with common Mode is injected. The needle point top cover slips over, rotates to prevent needle point again along whole syringe needle after the injection Come up.

The for convenience rotation of needle point top cover, for being arranged, a device make top cover more square along pin Just slide, also for convenience with needle hub or syringe be connected the needle point guard safety cap group Part also can have a folding elongated portion or tensile framework to be connected on the needle point top cover. This elongated portion or framework can transfer to link to each other with a connector, and connector is applicable to that usefulness can not The form of tearing open links to each other with needle hub. Needle hub transfers to be contained in advance on the syringe again, perhaps in injection Or before patient's extracting bodily fluid, syringe and needle hub are joined.

In order to help that the needle point top cover is remained on the needle hub, added one in the preferred embodiment Annular ring on the individual annular groove, itself and needle hub is intermeshing.

Before injection, remove in the process of needle guard, framework usually with connector with the syringe needle top cover Remain on the punctured bit away from needle point. In the preferred embodiment, teat on the connector and structure A groove on the frame joins, and when the operation needle housings, the augmenting portion of teat sticks in the groove. After the injection, manual or hand push framework makes the needle point top cover unclamp, slide to needle point and finally covers needle point.

After receiving needle point in the top cover, have a rotation corresponding to the promotion on the framework.When needle point is arranged in top cover,, can make the top cover rotation if continue to promote framework.Postrotational top cover is by preventing that needle point from coming up from Gai Kongzhong again in the cavity volume that needle point is remained on the top cover end wall.

In order further top cover to be remained on the rotation position, can or be fixed on the shank the framework locking usually.Framework is fixed up prevents that also framework from folding up and top cover is slided back along shank.So just can guarantee further that needle point can not emerge again.

The installation of this preferred embodiment

Needle point guard safety cap assembly 100 of the present invention can process to increase reliability and to reduce processing and installation cost by a single working of plastics mold.Although also nonessential, the preferred embodiments of the present invention adopt monomeric molded plastic part exactly.

Design of the present invention is just to install fully before using syringe needle, normally just is contained on the syringe needle or on the syringe at before sales.What the arrow among Fig. 1-5 showed is the installation steps of the preferred embodiment.

In order to install the needle point guard safety cap assembly in the preferred embodiment, the connector and the needle point top cover of syringe must be rotated to the position that receives syringe needle.Syringe connector and framework flexibly connect., syringe connector or cup 150 are spent with respect to framework 130 rotations about 90, syringe needle just can be along passing syringe connector 150 with the direction of framework 130 almost parallels of stretching out so for this reason.

Next step will clog or seal top cover 110 after a lid that flexibly connect with needle point top cover 110 or closure member 118 rotations.In order to help that lid is remained on the top cover, with 184 engagements of the cannelure on annular ring on the lid 182 and the top cover; Thereby the cross section of circle and groove shrinks gradually engagement is more prone to, but this makes that also circle and groove are difficult to separately.

The closed roof 110 that flexibly connects with framework 130 of rotation then, thus make syringe needle pass hole on the top cover and the hole on the syringe connector 150.

When top cover is in the position that hospitalizes pin, the folding or bending of the flexible portion of framework or stretch section 130 beginnings between two sections, top cover 110 is along the shank needle point that slips away then.In order to help aforesaid operations, also for fixing cup shell better before inserting syringe needle, can more convenient manipulation top cover 110 on the top cover 110 thereby a needle guard 300 is placed.

When top cover 110 slided on shank, framework maybe can be rolled over and stretch part 130 continuation bendings.When top cover abutted against or contacts with needle hub or syringe, framework 130 was releasably fixed top cover with syringe connector 150.In the preferred embodiment, the projection 192 of a head increase is passed the slit 194 on the framework on the syringe connector.The size that the projection head portion increases requires to apply suitable power in design on framework just can make head snap in slit.

Needle guard 300 also is mounted up and is used for selling when top cover 110 is slided shank.For the guard shield with pin is fixed on the needle hub, the inner face at connector in the preferred embodiment has adopted cannelure 186, and it engages with corresponding annular circle 206 on the needle tubing.The cross section of ring and groove is tapered, thereby makes engagement more easy, but this makes that also ring and groove are difficult to separately.Though the user can manually unclamp framework, when before the injection needle guard 300 being removed, the moving top cover 110 that fixes.

The preferred embodiment of Fig. 1-10

Fig. 1-10 has showed an embodiment of needle point guard safety cap assembly 100 of the present invention.It preferably adopts monomer plastics materials and parts to form the needle point guard safety cap group.Fig. 1 and 2 is described to be that this preferred needle point guard safety cap group is taken off latter two different lateral appearance from mould.Fig. 3-10 showed when this preferred embodiment is prepared to use and with the appearance of syringe when reality is used.

Get back to Fig. 1 and 2, needle point guard assembly or needle point top cover 100 comprise needle point medicated cap or cup shell or are used for covering the needle point covering device 110 of needle point.Needle point medicated cap or top cover 110 be shaped as elongate member with circumferential wall 112.The one end opening other end of elongate member 112 is then almost sealed up by diapire or end wall 116.

In present this preferred embodiment of Fig. 1 and 2, hole on needle point medicated cap 110 diapires 116 or eye 114 can make syringe needle therefrom pass.Hole 114 is positioned at the eccentric position of diapire, and cavity volume 126 has then occupied remaining most of wall.Lever arm or rotary apparatus 120 link to each other with the needle point medicated cap, when promoting, prevent that needle point from passing hole 114 thereby needle point medicated cap 110 relative needle points are rotated.

Fig. 1 and 2 has also showed closure member or roof or lid 118, but thereby the coupling part between its cast-over point medicated cap and the closure member rotates 110 sealings of needle point medicated cap.An eye or hole 122 are arranged on closure member or the locking device 118, pin is therefrom passed.In the present embodiment, closure member or shank geared assembly 118 are as the fulcrum and the syringe needle engagement of lever.When syringe needle passed the hole 122 on the closure member but do not pass hole 114 on the diapire, fulcrum or shank geared assembly 118 are nibbled the rotation of merging into the needle point medicated cap with syringe needle provided a fulcrum.

In the embodiment shown in Fig. 1 and 2, needle point guard safety cap assembly 100 should be suitable for linking to each other with needle hub or syringe.Needle point medicated cap 110 is stretched part or foldable part spare maybe can be rolled over the section of stretching 130 and links to each other with can rolling over, and foldable part spare links to each other with syringe connector or cup 150 again.Syringe connector 150 is used for the needle point guard security component is linked to each other with needle hub or syringe.In this preferred embodiment, adopt direct-connected form between needle point medicated cap 110 and the foldable part spare 130.

Cup 150 has circumferential wall 152 and diapire 154.Diapire 154 has the hole 156 that pin therefrom passes.In this special case, be provided with lath 158, it is used for limiting the passage of the inboard of circumferential wall 152 near diapire 154 places, thereby cup 150 is more easily connected on the needle hub.Also comprise a linking arm 160 in the present embodiment, extend out near diapire 154 from cup 150.Linking arm 160 is used for cup 150 is connected on the foldable part spare 130.Connecting wall 160 is to flexibly connect with foldable part spare 130.

Cup 150 in the preferred embodiment has annular ring relative on a cannelure 186 and the needle hub 206 and engages.The cross section of circle and groove is tapered, thereby makes its joint more easy, but separately is difficult to.The preferred embodiment further comprises an elongated slot 188, thus its with needle tubing on corresponding elongated slot 208 engage the sheath that makes pin and can rotate to definitely and pin hole 220 positions aligning.

In present this preferred embodiment, foldable part divides or extensible framework 130 has many use.It can be used to syringe connector 150 is linked to each other with needle point top cover 110, and can be used to releasably needle point medicated cap 110 is fixed on the far-end of needle point.It also can be used to needle point top cover 110 is slided shank, and helps needle point medicated cap 110 to rotate round needle point.In addition, it also helps to keep the rotation position of needle point top cover 110.

As illustrated in fig. 1 and 2, the section of stretching 130 can be rolled over, a furcula (wishbone) shape section 132 and a lower section 140 can be comprised.Wishbone section 132 has two arms 134 and a seat 136.Wishbone arm 134 flexibly connects with cup linking arm 160.Lower section 140 has a upper end 142 and a lower end 144.Wishbone section seat 136 links to each other with upper end 142 flexibilities of lower section 140.The lower end 144 of lower section and 110 flexible linking to each other of needle point medicated cap.There are two clamping elements 148 to be installed on the lower section 140.Wishbone section 132 forms an opening or devices, and when can the section of folding 130 bending, clamping element 148 can therefrom pass.Here also have a device, when can the section of folding 130 turning up, the projection 192 on the connector is engaged with slit 194, this point will more fully be described below.Shown in Figure 6 more clear to this.

Fig. 2 has also showed pressure platform 146, and it finally contacts with lever arm 120 and makes needle point medicated cap 110 produce rotation.Fig. 8 and Fig. 9 have showed the sight that needle point medicated cap 110 cast-overs point rotates from the angle of the best, and this point will be done comprehensive discussion in the back.

Fig. 2 has also showed a pair of outstanding clamping element 148, and it stretches out from lower section 140, as protection position locking device.Syringe needle is after using, and clamping element 148 can be rolled over the section of stretching 130 as one and be fixed on device on the shank.Can roll over the section of stretching 130 and be fixed on and can guarantee on the shank that needle point medicated cap 110 remains on rotation position or torsiversion, and also can make needle point medicated cap 110 remain on the protection position, needle point medicated cap 110 can not slip back on the shank like this, and needle point is come out.

Figure 9 shows that clamping element 148 and shank engagement and can roll over the section of stretching 130 and be fixed on sight on the shank.Figure 10 is the cross-sectional view that shank passes clamping element, and it illustrates the situation of clamping element and shank engagement.

Fig. 3 has showed thereby how cup 150 rotates for syringe needle to be passed cup 150 and prepares for cup 150 links to each other with syringe.Lath 158 is as a device, when syringe links to each other with pin in the cup or separates, can be used to syringe needle is carried out orientation and prevent that pin from rotating in cup.Cup or syringe connector 150 also have the projection 192 that head has increased.Projection detachably with lower section 140 in slit 194 engagement, thereby stretch part 130 when bending when rolling over as Fig. 6 and Fig. 7, a locking device is provided.

Fig. 3 has showed also how closure member 118 rotates and make the sight in needle point medicated cap 110 sealings formation chamber 128 shown in Figure 4.In this preferred embodiment, the limit 124 that hole on the closure member 118 or eye 122 have a part to tilt.The limit 124 that part tilts can make needle point medicated cap 110 cast-over point rotation more easily as shown in Figure 9.

In preferred embodiment shown in Figure 3, needle point medicated cap 110 has a cavity volume 126 that nestles up hole or eye 114.It helps to prevent that by needle point is held onto needle point from 114 unexpectedly emerging once more from the hole after the point rotation of needle point medicated cap 110 cast-overs.

Fig. 4 described cup 150 postrotational situations, thereby and showed that direction that syringe needle inserts prepares for needle point guard safety cap assembly 100 links to each other with syringe.Fig. 4 has also described the chamber 128 in the needle point medicated cap 110 that has sealed.Not only needle point is covered at this preferred embodiment lumen 128, also can collect from the effusive fluid of needle point.

Thereby the arrow on needle point medicated cap 110 next doors of having sealed among Fig. 4 indicates the direction of rotation of the needle point medicated cap 110 that has sealed and prepares with being connected of syringe for needle point guard safety cap 100.The rotation of cup 150 and the needle point medicated cap 110 that sealed makes the syringe needle can to pass both, thereby gets ready with being connected of syringe for needle point guard safety cap assembly 100.

Thereby Fig. 5 has described needle point guard safety cap assembly 100 to join for receiving the situation that needle guard 300 is prepared with syringe.Although in this preferred embodiment, it is to be connected on the needle hub 204, and it also can be connected on the syringe 202.

As shown in Figure 5, when load onto needle point guard safety cap assembly and for the use of needle guard 300 ready after, can roll over and stretch part 130 and begin bending.Fig. 5 also showed and can roll over when stretching part 130 bending, and one of them clamping element 148 is the sight from stretching out between the arm 134 of wishbone section 132 how.

After Fig. 6 has showed that folding is stretched the folding or bending of part 130, the situation of one of them clamping element 148 from stretching out between the arm 134 of wishbone section 132.Can be clear that from Fig. 6 after folding was stretched part 130 bendings, two clamping elements 148 all can stretch out between the arm 134 of wishbone section 132.

Fig. 5 has also described the projection 192 of cup 150 and can roll over the situation of slit 194 before needle guard 300 uses of stretching part.The arm of wishbone section 132 can make projection 192 and slit 194 mesh.

Can be clear that from Fig. 6, prevent that pin from being polluted before use thereby needle point medicated cap 110 is suitable for receiving needle guard 300.In this preferred embodiment, diapire 154 adjacency of closure member or roof 118 and cup 150 are to prevent that pin from being polluted.Having needle point guard safety cap assembly 100 and having installed the syringe of needle guard 300 described in Fig. 6 is the appearance that the user takes before use.The user only need remove needle guard then and use syringe to get final product according to the described general occupation mode of Fig. 7 when using syringe.The slit 194 that projection 192 on the connector and can rolling over is stretched part can prevent in the process that needle guard 300 is removed that needle point medicated cap 110 from sliding from shank.

After the use, stretch part 130 head that projection 192 has increased is released from slit 194 thereby user's only with hand refers to push away rolling over of having bent.When the head that has increased on the projection passes slit, can provide a tactile feedback information to the user, the guard shield that is syringe needle is enabled, and also tells the user will apply a sufficient force simultaneously and makes head pass slit, can guarantee that like this user's finger has enough impulse forces to start needle housings fully.

Then, the user continues to push away to roll over and stretches part 130, makes needle point medicated cap 110 slip over the length of syringe needle as shown in Figure 8.In this preferred embodiment, when needle point medicated cap 110 during near needle point, pressure platform 146 near and finally contact with lever arm 120.After the contact, stretch part 130 power is added on the lever arm 120 thereby continue to push away to roll over.Greatly in the time of contact, needle point 114 comes out to enter the chamber 128 from the hole.After needle point comes out from hole 114, corresponding to the thrust of lever arm 120, needle point medicated cap 110 122 rotations and therefore rotating around the hole around needle point.Fig. 9 has showed postrotational needle point medicated cap 110.

Corresponding to user's thrust, when rolling over when stretching part 130 near shank, clamping element 148 is put on the spot with the syringe needle engagement and with syringe needle, can roll over like this to stretch part and just be clipped in position shown in Figure 9.This just provides a kind of device, thereby it keeps by engaging of keep-up pressure platform 146 and lever arm 120 or needle point medicated cap 110 is fixed in it with respect to the postrotational position of needle point, and and then prevents that needle point from 114 coming up from the hole again.It also can be used to provide a kind of device, and this device can prevent to roll over to be stretched part 130 bending and prevent that needle point medicated cap 110 is sliding and needle point is exposed to last time along shank.Therefore, clamping element 148 can be used as the device that needle point top cover 110 is fixed on the protective position of syringe needle.Clamping element also can provide extra tactile feedback information to the user when meshing with shank.

In addition, in the described preferred embodiment of Fig. 9, cavity volume 126 is used for limiting needle point and prevents that needle point from 114 coming up from the hole again.Thereby this cavity volume also helps to collect the fluid that flows out from needle point can not run out of fluid from the needle point medicated cap.Also have, also spill the excess fluid of coming simultaneously for convenience and be collected into, in preparation is handled, needle guard 300 is placed on the needle point medicated cap 110 in order to ensure the hole 114 from needle point medicated cap 110 diapires 116.

The explanation of another embodiment shown in Figure 11-16

Needle point guard safety cap assembly 400 among this embodiment is also processed to increase reliability and to reduce and produce and installation cost by a unitary plastic spare mold.

For the needle point guard safety cap assembly of this embodiment is installed, syringe connector and needle point top cover must rotate to the position of preparing to accommodate syringe needle.Between syringe connector and the framework for flexibly connecting., syringe connector or cup 450 are spent with respect to framework 430 rotations about 90, syringe needle just can be along passing syringe connector 450 with the direction of framework 430 almost parallels of stretching out so for this reason.

Next step will clog or seal top cover 410 after a lid that flexibly connect with needle point top cover 410 or closure member 418 rotations.The rotation top cover that flexibly connects and sealed up with framework 430 then, thus make syringe needle can pass hole on the top cover and the hole on the syringe connector 450.When top cover is in the position of accommodating syringe needle, the folding or bending of the flexible portion of framework or stretch section 430 beginnings between two sections, then with top cover 410 along the shank needle point that slips away.In order to help aforesaid operations,, thereby a needle guard 480 is placed more convenient manipulation top cover 410 on the top cover 410 also for fixing cup shell better before inserting syringe needle.

When top cover 410 slided on shank, framework maybe can be rolled over and stretch part 430 continuation bendings.When top cover abuts against or contacts with needle hub or syringe, by with needle guard 480 top cover 410 being slided along shank, framework 430 will releasably be fixed top cover with syringe connector 450.Also needle guard need be installed when preparing to sell.Though the user can start top cover framework is unclamped, when before the injection needle guard 480 being removed, the moving top cover 410 that fixes.

After Figure 11 and 12 is depicted as this embodiment and takes off from mould two ipsilaterals not.Figure 13-16 appearance of having described when the preparation of this preferred embodiment is used with syringe.

Get back to Figure 11 and 12, needle point guard assembly or needle point top cover 400 comprise needle point medicated cap or cup shell or are used for covering the needle point covering device 410 of needle point.Needle point medicated cap or top cover 410 be shaped as elongate member with circumferential wall 412.The one end opening other end of elongate member 412 is then almost sealed up by diapire or end wall 416.

In the embodiment of Figure 11 and 12, pin can be from the hole on needle point medicated cap 410 diapires 416 or eye 414 pass.Lever arm or rotary apparatus 420 link to each other with the needle point medicated cap, when promoting lever arm or rotary apparatus, thereby needle point medicated cap 410 relative needle points are rotated prevent needle point from 414 passing from the hole.

Figure 11 and 12 has also showed closure member or roof or lid 118, but thereby the coupling part between its cast-over point medicated cap and the closure member rotates 410 sealings of needle point medicated cap.An eye or hole 422 are arranged on closure member or the locking device 418, syringe needle is therefrom passed.In this embodiment, closure member or shank geared assembly 418 are as the fulcrum and the syringe needle engagement of lever.When syringe needle passed the hole 422 on the closure member but do not pass hole 414 on the diapire, fulcrum or shank geared assembly 418 are nibbled the rotation of merging into the needle point medicated cap with syringe needle provided a fulcrum.

Needle point medicated cap 410 is stretched part or foldable part spare maybe can be rolled over the section of stretching 430 and links to each other with can rolling over, and foldable part spare links to each other with syringe connector or cup 450 again.Syringe connector 450 can be used to the needle point guard security component is linked to each other with needle hub or syringe.In this embodiment, adopt direct-connected form between needle point medicated cap 410 and the foldable part spare 430.

Cup 450 has circumferential wall 452 and diapire 454.Diapire 454 has the hole 456 that the tolerable syringe needle therefrom passes.In this special case, be provided with lath 458, be used for limiting circumferential wall 452 inboard passages, thereby cup 450 more easily is connected on the needle hub near diapire 454 places.Also comprise a linking arm 460 in the present embodiment, it extends near the place of diapire 454 from cup 450.Linking arm 460 is used for cup 450 is connected on the foldable part spare 430.Linking arm 460 and foldable part spare 430 are for flexibly connecting.

In this embodiment, foldable part spare or extensible framework 430 have many use.It can be used to syringe connector 450 is linked to each other with needle point top cover 410, and can be used to releasably needle point medicated cap 410 is fixed on the far-end of needle point.It also can be used to needle point top cover 410 is slided shank, and helps needle point medicated cap 410 to rotate around needle point.In addition, it also helps to keep the position of rotation of needle point top cover 410.

Shown in Figure 11 and 12, can roll over the section of stretching 430, can comprise a wishbone section 432 and a lower section 440.Wishbone section 432 has two arms 434 and a seat 436.Wishbone arm 434 flexibly connects with cup linking arm 460.Lower section 440 has a upper end 442 and a lower end 444.The seat 436 of wishbone section and 442 flexible linking to each other of the upper end of lower section 440.The lower end 444 of lower section and 410 flexible linking to each other of needle point medicated cap.There are two outstanding clamping elements 448 to be installed on the lower section 440.Wishbone section 432 has formed an opening or a device, and when can the section of folding during 430 bendings, clamping element 448 can therefrom pass.

Figure 12 has also showed a pressure platform 446, and it finally contacts with lever arm 420 and makes needle point medicated cap 410 produce rotation.Pressure platform 446 is adjacent with lock face or locking edge 449.Lock face 449 is used for stretching part and can rolling over when turning up and stretch part 430 and be fixed on the cup 450 can rolling over.Lock face 449 will discuss in more detail below.

Figure 12 has also showed a pair of outstanding clamping element 448, and it stretches out from lower section 440, as protection position locking device.After syringe needle uses, clamping element 448 can be rolled over the section of stretching 430 as one and be fixed on device on the shank.Can roll over the section of stretching 430 and be fixed on and can guarantee on the shank that needle point medicated cap 410 remains on rotation position or torsiversion, and make needle point medicated cap 410 remain on the protection position, needle point medicated cap 410 can upwards not slided back along shank like this, and needle point is come out.

Figure 13 has showed thereby how cup 450 rotates for syringe needle passes cup 450 and links to each other with syringe to prepare.Lath 458 is as a device, when syringe links to each other with syringe needle in the cup or separates, can be used to syringe needle is carried out orientation and prevent that syringe needle from rotating in cup.Cup or syringe connector 450 also have a projection or locking protuberance 462.Projection or locking protuberance 462 detachably with lock face or locking edge 449 engagements, thereby stretch part 430 when bending as shown in Figure 16 when rolling over, a locking device is provided.

Figure 13 has also showed closure member 418 rotation sealing needle point medicated caps 410 and has formed the situation in chamber 428 shown in Figure 14.In this embodiment, hole on the closure member 418 or eye 422 have the limit 424 of a part inclination.The limit 424 that part tilts can make needle point medicated cap 410 cast-over point rotation more easily as shown in Figure 9.

Needle point medicated cap 410 has an annular ditch 426 in the hole or around the eye 414.Its after the point rotation of needle point medicated cap 410 cast-overs, thereby by the needle point constraint being helped to prevent needle point from 414 unexpectedly emerging once more from the hole.

Figure 14 described cup 450 postrotational situations, thereby and showed that direction that syringe needle inserts prepares for needle point guard safety cap assembly 400 links to each other with syringe.Figure 14 has also described the chamber 428 in the needle point medicated cap 410 that has sealed.This chamber not only can cover needle point in this embodiment, also can collect from the effusive fluid of needle point.

Among Figure 14, the arrow on needle point medicated cap 410 next doors of having sealed indicates the direction of needle point medicated cap 410 rotations of having sealed, and just gets ready for needle point guard safety cap assembly 400 links to each other with syringe after the rotation.To can make the syringe needle pass both after the cup 450 and needle point medicated cap 410 rotations of having sealed, thereby get ready with being connected of syringe for needle point guard safety cap assembly 400.

Thereby Figure 15 has described needle point guard safety cap assembly 400 to join for receiving the situation that needle guard 480 is prepared with syringe 490.Although in this embodiment, described assembly is to be connected on the needle hub 494, and it also can be connected on the syringe 492, thereby a device that links to each other with syringe 490 is provided.

As shown in figure 15, when load onto needle point guard safety cap assembly 400 and for the use of needle guard 480 ready after, can roll over and stretch part 430 and begin bending.Figure 15 also showed and can roll over when stretching part 430 bending, and one of them clamping element 448 is the sight from stretching out between the arm 434 of wishbone section 432 how.After Figure 16 has showed that folding is stretched the folding or bending of part 430, the situation of one of them clamping element 448 from stretching out between the arm 434 of wishbone section 432.Can be clear that from Figure 16 after folding was stretched part 430 bendings, two clamping elements 448 all can stretch out between the arm 434 of wishbone section 432.

Figure 15 has also described projection or locking protuberance 462 and the lock face or the situation of locking edge 449 before using needle guard 480 of cup 450.Projection on the cup 450 or locking protuberance 462 provide a face, can roll over locking edge or the lock face 449 stretched on the part 430 and contact with it, thereby a releasable locking device is provided.The arm 434 of wishbone section can make projection or locking protuberance 462 contact with lock face 449.When Figure 16 has also described needle guard pin has been covered, the situations of

lock face

449 and 462 engagements of locking protuberance.

Can be clear that from Figure 16, prevent that syringe needle is contaminated before use thereby needle point medicated cap 410 is suitable for receiving needle guard 480.In this embodiment, closure member or roof 418 are contaminated to prevent syringe needle with diapire 454 adjacency of cup 450.Having needle point guard safety cap assembly 400 and installing the syringe of needle guard 480 described in Figure 16 is that the user takes appearance before use.The user only needs needle guard is just removed and can use syringe according to general method when using syringe.Intermeshing locking protuberance 462 and lock face 449 can be used for preventing that needle point medicated cap 410 from sliding from shank in the process that needle guard 480 is removed.

After the use, stretch part 430 and lock face 449 is shifted out from locking protuberance 462 get final product thereby user's only with hand refers to push away rolling over of having bent.In this embodiment, when needle point medicated cap 410 during near needle point, pressure platform 446 near and finally contact with lever arm 420.After the contact, stretch part 430 power is added on the lever arm 420 thereby continue to push away to roll over.Greatly in the time of contact, needle point 414 comes out to enter the chamber 428 from the hole.After needle point comes out from hole 414, corresponding to the thrust of lever arm 420, needle point medicated cap 410 422 rotations and therefore rotating around the hole around needle point.

Stretch portions 430 corresponding to user's promotion during near shank when rolling over, clamping element 448 surrounds with the pin engagement and with pin, can roll over like this to stretch part 430 and just be held the location.And a kind of device is provided thus, thus this device keeps needle point medicated cap 410 by engaging of keep-up pressure platform 446 and lever arm 420 or is fixed on respect to the postrotational position of needle point, and and then prevent that needle point from 414 coming up from the hole again.It also can be used to provide a kind of device, and this device can prevent to roll over to be stretched part 430 bending and prevent that needle point medicated cap 410 is sliding and needle point is exposed to last time along shank.Therefore, clamping element 448 provides a kind of device that needle point top cover 410 is fixed on the protective position of pin.

Annular ditch 426 is used for limiting needle point and prevents that needle point from 414 coming up from the hole again.Thereby this ditch also helps to collect the fluid that flows out from needle point can not run out of fluid easily from the needle point medicated cap.Hole 422 tightly is centered around around the shank, and the fluid in the cavity volume can be from the hole 422 spill like this.In addition, also spill the excess fluid of coming in order to ensure the hole 414 from needle point medicated cap 410 diapires 416 simultaneously for convenience and be collected into, when preparing to handle, needle guard 480 can place on the needle point medicated cap 410.

Though only disclose several embodiments of the present invention, on the basis that does not break away from claim of the present invention, also had many improvement or other embodiment.

Claims

1. needle point guard safety cap assembly, it is used for safely the needle point of syringe is covered and protects after using syringe, and described assembly comprises:

A) a syringe connector, it is used for needle point guard safety cap assembly is connected on the needle hub of syringe firmly;

B) a needle point top cover, it adopts the shape of the hollow part of elongation, and this parts one end opening is used for syringe needle is received wherein, and the other end almost by end wall sealing, has a hole on the end wall, and syringe needle can pass from this hole;

C) lid, it is used for the opening of closed roof, also has the hole that can allow syringe needle therefrom pass on the lid, and like this, pin just can pass this two holes;

D) extending framework has a near-end and a far-end on this extending framework, the near-end far-end that links to each other with the syringe connector then links to each other with the needle point top cover; Extending framework can manually be pushed top cover the end wall of top cover to along syringe needle, and finally surpasses the summit of needle point;

E) then, the needle point top cover is supported by the hole on the lid, and when the moving on of top cover around the rotation of the hole on the lid, up to the inboard of needle point, enter a protection position by the top cover end wall that sealed, needle point can not pass the hole on the top cover on this position.

2. a kind of needle point guard safety cap assembly as claimed in claim 1, wherein lid pivotally is fixed on the top cover; And syringe connector, top cover, lid and extending framework are integrally formed by plastic material.

3. a kind of needle point guard safety cap assembly as claimed in claim 1, top cover wherein further comprises a cavity volume, cavity volume is formed on the end wall adjacent with the hole, the hole is as the passage of pin, when the needle point top cover works, cavity volume is used for the tip of pin is closed, thereby comes up from Kong Zhongzai in the tip that prevents pin.

4. a kind of needle point guard safety cap assembly as claimed in claim 3, on the needle point top cover, further comprise a fulcrum, extending framework enters in the cavity volume tip of pin thereby can further act on the fulcrum and top cover is rotated when the top cover end wall exceeds the summit of needle point simultaneously.

5. a kind of needle point guard safety cap assembly as claimed in claim 1, wherein extending framework further comprises a near-end frame section and a far-end frame section, centre at extending framework between the frame section links to each other with hinge, hinge works anteposition in the position of closure at the needle point top cover, at this moment near-end and far-end frame section are substantially parallel each other, hinge-opening, framework can extend.

6. a kind of needle point guard safety cap assembly as claimed in claim 5 also further comprises at least one fixation clamp on extending framework, this fixation clamp can irreversibly be engaged on the syringe needle when the needle point top cover works fully.

7. a kind of needle point guard safety cap assembly as claimed in claim 1, on syringe connector and extending framework, also further comprise the interlocking part, this interlocking part releasably is fixed on needle point guard safety cap assembly the state that does not also work, and a sense of touch indication is provided when needle point guard safety cap assembly works.

8. a kind of needle point guard safety cap assembly as claimed in claim 7, wherein the interlocking part on the syringe connector comprises a projection, a spherical termination that has increased is arranged on the projection, and the interlocking part on the extending framework then comprises a slit, and its width is slightly less than the diameter of spherical termination; Projection and slit lay respectively on syringe connector and the extending framework, like this when needle point guard safety cap assembly be in the state that do not work, when the needle point top cover is in the needle point distal-most end, projection is passed slit by its spherical termination and is meshed with slit, and the protective cover of syringe needle releasably remains on the state of not working thus.

9. a kind of needle point guard safety cap assembly as claimed in claim 1, wherein the syringe connector further comprises at least one cannelure, its with the syringe needle hub on the engagement of corresponding annular ring.

10. a kind of needle point guard safety cap assembly as claimed in claim 1, wherein the syringe connector comprises that further at least one elongated slot is meshed with corresponding long projection on the syringe needle hub, thereby makes needle point guard safety cap remain on fixed radial direction with respect to the syringe jacket tube opening.

11. a kind of needle point guard safety cap assembly as claimed in claim 1, wherein the needle point top cover is suitable for receiving needle guard, thereby needle guard is covered syringe needle at the needle point top cover during away from needle point.

12. in a kind of needle point guard safety cap assembly that has syringe connector and an extending framework that links to each other with the syringe connector,

There is a needle point top cover to link to each other with extending framework, the needle point top cover adopts the shape of the hollow part of elongation, this parts one end opening is used for the syringe needle income wherein, the other end is almost sealed by an end wall, one hole is arranged on the end wall, and syringe needle can pass from this hole during use, and this end wall further comprises a cavity volume, when syringe needle moved into, this cavity volume can fetter with the engagement of the tip of syringe needle and with the tip of pin.

13. needle point top cover as claimed in claim 12, further comprise a supporting point part, when the end wall of top cover exceeded the needle point summit, the extending framework of needle point guard safety cap assembly acted on the supporting point part, thereby make the top cover rotation, the tip of syringe needle is entered in the cavity volume.

14. have one

(1) syringe connector, it is used for needle point guard safety cap assembly is connected on the needle hub of syringe;

(2) needle point top covers, it is used for when needle point guard safety cap works the top of needle point being sealed;

(3) extending frameworks, it has near-end and far-end, and near-end links to each other with the syringe connector, and far-end then links to each other with the needle point top cover; A needle point guard safety cap assembly in,

Have interlock on syringe connector and the extending framework and come releasably needle point guard safety cap assembly to be locked in the Puiescent, inoperative state, and when needle point guard safety cap assembly begins to work, provide tactile feedback information to the user.

15. have one

(1) syringe connector, it is used for needle point guard safety cap assembly is connected on the syringe needle hub;

On extending framework, has a fixation clamp at least, it is when needle point guard safety cap assembly works and shank engagement, thereby the head that prevents pin comes out from the needle point top cover, and provides tactile feedback information to the user when the needle point guard safety cap assembly effect is finished.

16. have one

(a) inner chamber is arranged in the needle point top cover, when needle point guard safety cap assembly works, it is used for accommodating the top of syringe needle, and also have the hand-hole of a syringe needle and portal and communicate with inner chamber, injection needle passes hand-hole, inner chamber and portals before the needle point top cover works, then when top cover works, recall from portalling, the top of syringe needle is located in the inner chamber so again;

(b) one constitutes the fulcrum of one with the needle point top cover, and it contacts with shank when needle point guard safety cap assembly works, and fulcrum is used for making the needle point top cover to rotate with respect to shank;

(c) one constitutes the lever arm of one equally with the needle point top cover, and it is used for revolving force is added on the needle point top cover; And

(d) one constitutes the pressure platform of one with extending framework, this pressure platform is used for working and the top of syringe needle is added to power on the lever arm when being positioned at inner chamber at needle point guard safety cap assembly, thereby make the rotation of needle point top cover, the top of pin can not passed to portal and come up from the needle point top cover like this.

17. a needle point guard safety cap assembly, it is used for safely the needle point of syringe is covered and protects after syringe uses, and described assembly comprises:

(a) device, it is used for needle point guard safety cap assembly is connected on the needle hub of syringe firmly;

(b) a needle point top cover, it adopts the shape of the hollow part of elongation, and this parts one end opening is used for syringe needle is received as wherein, the other end almost by end wall sealing, has a hole on the end wall, and syringe needle can pass from this hole;

(c) device, it is used for the opening of closed roof, but this device allows syringe needle therefrom to pass;

(d) framework that is connected on syringe connecting device and the needle point cover device far-end, this framework can manually be pushed top cover the end wall of top cover to along syringe needle, and finally surpasses the summit of needle point;

(e) then, top cover is supported by the hole on the lid, and when the moving on of top cover, top cover is around the rotation of the hole on the lid, passes the inboard of the top cover end wall that has sealed up to needle point, enters a protection position, and needle point can not pass the hole on the top cover on this position.

(f) needle point guard safety cap assembly is one of the forming.

18. further comprise manual-lock as claim 17 as the needle point guard safety cap assembly of stating, it is fixed on top cover the protection position of syringe needle.

19. needle point guard safety cap assembly as claimed in claim 17 further comprises a device, this device can releasably be locked in top cover the far-end position of needle point.

20. a needle point guard safety cap assembly comprises:

A) cup-shaped seat, it comprises:

(i) circumferential wall, and have a diapire to be connected on the circumferential wall forming a cup,

(ii) this cup is used for being connected on the syringe,

(iii) the diapire of cup has a hole, and this hole can make syringe needle therefrom pass,

(iv) a pair of linking arm, it is protruding near the position of cup diapire from circumferential wall, and

(v) locking projection, it stretches out near position of cup diapire from circumferential wall;

B) can roll over the section of stretching for one, it has at least two sections, comprising:

(i) wishbone section, it has two arms and a seat, and arm and cup-shaped seat linking arm flexibly connect, and like this, cup-shaped seat can be around the axle rotation that forms between linking arm and the wishbone connector; And

(ii) lower section, it has top and bottom, the upper end flexibly connects with the wishbone seat, lower section has a lock slots in the position near the lower end, when rolling over that the section of stretching is turned up and lower section when being in the position of contiguous cup-shaped seat, this lock slots is locked in lower section on the locking projection of cup-shaped seat with releasable form; And

C) a needle point medicated cap flexibly connects the lower end in lower section, and this needle point medicated cap comprises:

(i) circumferential wall, a roof and a diapire, the three forms a chamber; And

An eye is (ii) respectively arranged on the roof of needle point medicated cap and the diapire, and syringe needle can pass from eye.