CN2933438Y

CN2933438Y - Improved safety injection device

Info

Publication number: CN2933438Y
Application number: CN 200620122962
Authority: CN
Inventors: 陈昌慈
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-08-08
Filing date: 2006-08-08
Publication date: 2007-08-15
Anticipated expiration: 2016-08-08

Abstract

The utility model provides a modification of secure injection device, comprising a liquid cylinder, a needle head, a push rod, a toggle, in order to push forward continuously for the push rod and the toggle after exerting and injecting, making the chuck end at the front end of the push rod chuck the locking portion of the liquid cylinder seat, forcing a push strength for the push rod, breaking the tearing portion of the top wall of the liquid cylinder to separate the needle from the liquid cylinder, drawing the push rod, making the rod head of the push rod chuck the stop portion of the opening at back end of the liquid cylinder, inserting the cylinder piston portion of the push rod at the opening of the front end of the liquid cylinder, breaking the push rod at the second breaking portion, closing two openings of the liquid cylinder through the rod head and the cylinder piston portion separately.

Description

The improvement of safety injector

Technical field

This utility model is a kind of improvement of safety injector, especially finger is a kind of is returned to the fluid cylinder open rearward end to form clip with push rod after injection, make needle retractable to fluid cylinder, fracture in first broken part of push rod immediately, then the tube piston part with push rod is embedded at the fluid cylinder front opening, and is fractureed in its second broken part, rear, and syringe needle is completely enclosed within the fluid cylinder, and the syringe needle after the order use does not have the possibility of exposing fluid cylinder extremely, thereby increases the safety after using.

Background technology

Injection device, for example syringe cylinder occupies very big proportion in medical device, is difficult to the disease for the treatment of especially more in recent years, spreading of acquired immune deficiency syndrome (AIDS) for example, so that constantly taken place by the case of infectable infection.Therefore, also cause the attention of each bound pair medical device, especially with syringe cylinder for very, so the disposable syringe cylinder of tool self-destroying function is to become inevitable and unavoidable trend.

I.e. " safety injector " of No. 094221468 patent application case of TaiWan, China that is had with this utility model applicant (corresponding to No. 200510134691.5 patent application case of China) is example, it is by a fluid cylinder, one syringe needle, one push rod, one collar and a locating ring are formed, wherein, this syringe needle is the seat tenon that is incorporated into the fluid cylinder front end, this tenon inside is provided with a snapping portion, its with roof that outer side neck ring links to each other between be provided with a spiral type and tear ditch, and locating ring is to be socketed between a tenon and the tube ring, to increase the roof stress of fluid cylinder; The shaft front end of this push rod extends axially a roofbolt with a clamping part, and it passes through and fix this collar; After injection, push away before the continuation again together with the collar by push rod, after making the clamping part of roofbolt be snapped in the snapping portion of a tenon, again push rod is bestowed a forward thrust amount, tear the ditch fracture and make, thereby after causing syringe needle and fluid cylinder separating, again this push rod is retracted backward, syringe needle, push rod leading portion and the collar are placed in the fluid cylinder.

This safety injector is after laying particular emphasis on injection syringe needle to be separated with fluid cylinder, push rod is retracted backward again, syringe needle, push rod leading portion and the collar is accommodated in the fluid cylinder, and it can't be exposed again, does not use for drawing liquid more again, and has desired disposable function.In addition, the push rod of this case to form a bar neck, when being snapped in the T-Ring of fluid cylinder open rearward end with this burr portion of box lunch, applies external force to push rod in burr portion rear reduced diameter, so that bar neck position forms fracture, by to shorten the entire length of this safety injector.

As if medical personnel's careless manipulation, for example really the burr portion of push rod is not snapped in the T-Ring of fluid cylinder, promptly fracture in bar neck place, perhaps syringe needle and seat tenon gets loose.This measure will cause this syringe needle to move in fluid cylinder, still might prick medical personnel or Treatment of Medical ' Waste personnel by mistake, and necessity of further improvement is arranged.

In view of this, this utility model applicant this in the experience of being engaged in safety injector design and production and marketing for many years, phase can overcome aforementioned safety injector after injection, it is the disappearance of the broken part sealing of push rod that this fluid cylinder only has an end, through experiment and test repeatedly, and then develop and " improvement of safety injector " of the present utility model.

The utility model content

This utility model main purpose is to provide a kind of improvement of safety injector, it is by a fluid cylinder, one syringe needle, one push rod reaches a collar and forms, wherein, this syringe needle is the seat tenon that is incorporated into the fluid cylinder front end, this tenon inside is provided with a snapping portion, its with roof that outer side neck ring links to each other between be provided with a tearing part, and the fluid cylinder open rearward end is provided with a stopper section; And the shaft front end of this push rod extends axially a roofbolt with a clamping part, and it is to pass through and fix this collar, so that be placed in the fluid cylinder slippingly, the shaft at this roofbolt rear is provided with a club head, one first broken part, a piston part, and one second broken part; So that push away before continue injection and injection back together with the collar by this push rod, make clamping part be snapped in snapping portion after, again push rod is bestowed a forward thrust amount, make this tearing part fracture, and cause syringe needle to separate with fluid cylinder; Then this push rod is retracted, the club head clip that makes push rod is in the stopper section of fluid cylinder open rearward end, and make syringe needle, push rod leading portion and the collar be accommodated in the fluid cylinder, in place, first broken part push rod is fractureed immediately, then the tube piston part with push rod is embedded at the fluid cylinder front opening, and in second broken part place push rod is fractureed, what make that the fluid cylinder both ends open is respectively push rod is respectively club head and tube piston part sealing person.

This utility model secondary objective is to provide a kind of improvement of safety injector, and wherein this tearing part is to tear ditch for the spiral type that at least one tool thickness changes.

Another purpose of this utility model is to provide a kind of improvement of safety injector, and it comprises a locating ring in addition, and it is to be socketed between a tenon and the tube ring, and is contacted with the roof of fluid cylinder.

This utility model purpose again is to provide a kind of improvement of safety injector, and wherein this snapping portion is a snap ring, and clamping part then is an oblique outer arrow shape coak of opening, and this coak can be snapped in this snap ring.

The another purpose of this utility model is to provide a kind of improvement of safety injector, and wherein this stopper section is to establish a T-Ring in the fluid cylinder open rearward end is inwardly prominent, and the club head of push rod is made of two forward and backward fins, and this two fin can be snapped in T-Ring and locate.

Another purpose of this utility model is to provide a kind of improvement of safety injector, wherein this roofbolt is radially dashed forward and is established a sliding part, it is that forward and backward ring plate by two periphery tool bevels is constituted, so that common double team collar rear annular distance, when the collar props up the roof of fluid cylinder, this two ring plate enters in the ring casing, and can slide within it, makes roofbolt be continued reach person.

This utility model purpose again is to provide a kind of improvement of safety injector, and wherein this push rod is that shaft leading portion at the roofbolt rear is provided with a club head, one first broken part, a piston part, and one second broken part in regular turn.Perhaps, this push rod is that the shaft leading portion at the roofbolt rear is provided with a club head and one first broken part in regular turn, then adjacent one second broken part and the piston part of being provided with of shaft latter end.

Description of drawings

Be further to disclose technology contents of the present utility model, at first see also graphic, wherein:

Fig. 1 is the three-dimensional exploded view of this utility model safety injector;

Fig. 2 is the profile after standing for this utility model group;

Fig. 3 for push away before this utility model push rod and the syringe needle and with the isolating sketch map in fluid cylinder top;

Fig. 4 for this utility model push rod pull back and clip in the sketch map of fluid cylinder open rearward end;

Fig. 5 a, Fig. 5 b are the sketch map that this utility model push rod fractures in the fluid cylinder open rearward end;

Fig. 6 is nested in the sketch map of fluid cylinder front opening for the bar plug of this utility model push rod;

Fig. 7 a, Fig. 7 b are the sketch map that this utility model push rod fractures in the fluid cylinder front opening;

Fig. 8 is another embodiment profile of this utility model safety injector;

Fig. 9 is the sketch map that the push rod of Fig. 8 fractures in the fluid cylinder open rearward end;

Figure 10 is the sketch map that the push rod of Fig. 9 fractures in the fluid cylinder front opening.

The specific embodiment

Extremely shown in Figure 2 as Fig. 1, basically, the big parts of safety injector of the present utility model is that No. 094221468 patent application case of this country that is had with the applicant is identical, incorporate this utility model at this into to mention mode, so this safety injector is by a fluid cylinder 1, one syringe needle 2, one push rod 3, and a collar 4 combines.

Wherein, fluid cylinder 1 is a hollow form, and its chamber of inner tool 11 is for ccontaining liquid medicine injection, and its rear then is provided with a pair of fin 12, so that supply the usefulness of user gripping.Fluid cylinder 1 front end is the seat tenon 14 of less and central tool one through hole 13 of tool one external diameter then, and its periphery outside is provided with a ring 15, and this is the existing assembly of fluid cylinder 1 all, does not intend giving unnecessary details at this.And for syringe needle 2 is separated with fluid cylinder 1 top, as shown in the figure, on the roof 16 that this ring 15 links to each other, then be provided with a tearing part 17, the spiral type that for example at least one tool thickness changes is torn ditch, its purpose can be torn this tearing part 17 when injection back syringe needle 2 logotype seat tenons 14 can be pushed away before continuing, and forms the effect of self-destruction.But this tearing part 17 can make this syringe needle 2 all belong to this utility model category of the present utility model with the isolating tearing configuration in fluid cylinder 1 top not as limit such as.

In addition, this tenon 14 is in abutting connection with then inwardly prominent snapping portion 18, for example snap ring of establishing of roof 16 inner faces.Moreover, the inwardly prominent stopper section 19 of establishing of these chamber 11 nearly open rearward end, for example T-Ring is chatted after its dependent interaction appearance again.

Into person is arranged especially, and this utility model is socketed on a locating ring 5 between a tenon 14 and the tube ring 15 in addition, and it is the roof 16 that is contacted with fluid cylinder 1, and it is that hard or soft material are made, but with soft elastic material, for example elastomeric material is good.This locating ring 5 is provided with purpose, can avoid because of the design of the plane of weakness of tearing part 17 the situation generation that institute may cause push rod 3 to rock; If tearing ditch 17 breaks accidentally, this locating ring 5 is also further born the effect of leak-stopping simultaneously.

Syringe needle 2 is to be prior art, and it has an entry needle 21 and is linked to needle stand 22, and these needle stand 22 central authorities are hole 23 of tool then, and can be communicated in the pin hole of entry needle 21, and this hole 23 is closely to be sleeved on a tenon 14.

Push rod 3 is the strip body of rod, and its end has a push jack 31, and shaft 32 is made of some radial lamellar bodies, and front end is tool one club head 33 then, and its place ahead extends axially a roofbolt 34, the radially prominent sliding part 35 of establishing of this roofbolt 34.Roofbolt 34 then is a clamping part 36 foremost, for example oblique outer arrow shape coak of opening.

This club head 33 is that 331,332 of forward and backward fins by two periphery tool bevels constitute, and in the stopper section 19, is retraction shape first broken part 37 in order to these club head 33 rear external diameters in order to push rod 3 clips, and for example the bar neck fractures.And sliding part 35 to be 351,352 of forward and backward ring plates by two periphery tool bevels constitute so that the annular distance 42 of the common double team collar 4 rear walls.

, this utility model is also that these 37 rears, first broken part are provided with and are provided with a piston part 38 and in regular turn and also are retraction shape second broken part 39, for example fill in neck and differing from prior art.

The collar 4 is made for soft material, but be not limited to elastomeric material, its outside dimension is corresponding to tube chamber 11, close so that can closely fill in, and an annular distance 42 is opened at its inner ring casing 41 rears, for and the aforesaid two ring wings 351,352 sockets, and the front end less axis hole 43 of tool one size then is so that passing for clamping part 36.Wherein, this ring casing 41 has suitable depth, so that two ring plates 351,352 of sliding part 35 can be slided within it.

See also Fig. 2, this utility model in group immediately, at first the collar 4 is sleeved on roofbolt 34, clamping part 36 is passed by axis hole 43, and two ring plates 351,352 are socketed on annular distance 42, then push rod 3 is inserted in the tube chamber 11 of fluid cylinder 1 together with the collar 4, and syringe needle 2 are nested in a tenon 14 by needle stand 22, promptly present profile as shown in Figure 2, and can be the medicinal liquid state that draws.

After drawing medicinal liquid, and during injection, be, make 11 reaches of its front end collar 4 along the tube chamber with push rod before pointing 3, and the extruding medicinal liquid, make it pass through a tenon 14 and syringe needle 2, and be injected in the body.

When injected appropriate after, as shown in Figure 3, will push away before this push rod 3, make clamping part 36 be snapped in snapping portion 18 in the tenon 14, and the two forward and backward ring wings 351,352 of sliding part 35 prop up roof 16 inner faces of fluid cylinder 1 because of the collar 4, and move on, and enter respectively in the ring casing 41.Before continuing, push rod 3 pushes away, this tearing part 17 thereby fracture, and roof 16 is separated with fluid cylinder 1, till can't before pushing away again, can effectively prevent to re-use.

As shown in Figure 4, this push rod 3 is pulled back, to tube chamber 11, form clips up to the stopper section 19 and the club head 35 of tube chamber 11 open rearward end together with the collar 4, seat tenon 14, locating ring 5 and syringe needle 2 post-tensionings this moment, makes push rod 3 unlikely possibilities of pulling back again.

As shown in Figure 5, at this moment, can push rod 3 be fractureed via 37 places, first broken part, making the some of syringe needle 2, push rod 3 and the collar 4 is to reside in the chamber 11.

As shown in Figure 6, tube piston part 38 with the rear push-rod 3 that is about to fracture is embedded by fluid cylinder 1 front opening, via 39 places, second broken part push rod 3 is fractureed, and this fluid cylinder 1 both ends open is respectively club head 33 and a tube piston part 38 is sealed, even if therefore fluid cylinder 1 is abandoned, the exhausted puzzlement of not having on the safety.

See also Fig. 8 to Figure 10, shown in be sketch map and the relevant action figure of this utility model push rod 3 another embodiment, it is with the difference of before taking off embodiment, be that this push rod 3 ends are located in a piston part 38 ', and as the usefulness of pointing propelling movement or pull, its place ahead is then in abutting connection with one second broken part 39 '.So, as shown in Figure 9, after injection finishes, can push rod 3 be fractureed via 37 places, first broken part, making the some of syringe needle 2, push rod 3 and the collar 4 is to reside in the chamber 11.As shown in figure 10, then, tube piston part 38 ' is embedded by fluid cylinder 1 front opening, locate push rod 3 is fractureed via second broken part 39 ' again, and this fluid cylinder 1 both ends open is respectively club head 33 and a tube piston part 38 is sealed.

So, via enforcement of the present utility model, after injection and injection, push rod is pulled back, can make the stopper section of fluid cylinder open rearward end and club head form clip, and assemblies such as the collar, seat tenon, locating ring and syringe needle is ccontaining and be positioned in the fluid cylinder, in place, first broken part push rod is fractureed immediately; Then the tube piston part with push rod is embedded by the fluid cylinder front opening, via place, second broken part push rod is fractureed again, make this fluid cylinder both ends open be respectively club head and the tube piston part seal, and the syringe needle after the order use does not have the possibility of exposing fluid cylinder extremely, thereby increasing the safety after using, really is a ware big good structure not seen before.

That this utility model disclosed is a kind of of preferred embodiment, and patent right category of the present utility model is not all taken off in partial such as change or modification and come from technological thought of the present utility model and be easy to the person of knowing by inference by the people who has the knack of this skill.

Claims

1. the improvement of a safety injector, it is by a fluid cylinder, one syringe needle, one push rod reaches a collar and forms, and it is characterized in that, this syringe needle is the seat tenon that is incorporated into the fluid cylinder front end, this tenon inside is provided with a snapping portion, its with roof that outer side neck ring links to each other between be provided with a tearing part, and the fluid cylinder open rearward end is provided with a stopper section; And the shaft front end of this push rod extends axially a roofbolt with a clamping part, and it is to pass through and fix this collar, so that be placed in the fluid cylinder slippingly, the shaft at this roofbolt rear is provided with a club head, one first broken part, a piston part, and one second broken part.

2. the improvement of safety injector as claimed in claim 1 is characterized in that, described this tearing part is to tear ditch for the spiral type that at least one tool thickness changes.

3. the improvement of safety injector as claimed in claim 1 is characterized in that, other comprises a locating ring, and it is to be socketed between a tenon and the tube ring, and is contacted with the roof of fluid cylinder.

4. the improvement of safety injector as claimed in claim 1 is characterized in that, described this snapping portion is a snap ring, and clamping part then is an oblique outer arrow shape coak of opening, and this coak is snapped in this snap ring.

5. the improvement of safety injector as claimed in claim 1 is characterized in that, described this stopper section is to establish a T-Ring in the fluid cylinder open rearward end is inwardly prominent, and the club head of push rod is made of two forward and backward fins, and this two fin is snapped in T-Ring and locatees.

6. the improvement of safety injector as claimed in claim 1, it is characterized in that, the radially prominent sliding part of establishing of described this roofbolt, it is that forward and backward ring plate by two periphery tool bevels is constituted, so that common double team collar rear annular distance, when the collar propped up the roof of fluid cylinder, this two ring plate entered in the ring casing, and can slide within it, make roofbolt be continued reach.

7. the improvement of safety injector as claimed in claim 1 is characterized in that, described this push rod is that the shaft leading portion at the roofbolt rear is provided with a club head in regular turn, one first broken part, a piston part, and one second broken part.

8. the improvement of safety injector as claimed in claim 1 is characterized in that, described this push rod is that the shaft leading portion at the roofbolt rear is provided with a club head and one first broken part in regular turn, then adjacent one second broken part and the piston part of being provided with of shaft latter end.