CN100536950C - Disposable safety injecting device - Google Patents
Disposable safety injecting device Download PDFInfo
- Publication number
- CN100536950C CN100536950C CNB2006101098233A CN200610109823A CN100536950C CN 100536950 C CN100536950 C CN 100536950C CN B2006101098233 A CNB2006101098233 A CN B2006101098233A CN 200610109823 A CN200610109823 A CN 200610109823A CN 100536950 C CN100536950 C CN 100536950C
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- push rod
- ring
- fluid cylinder
- injecting device
- disposable safety
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Abstract
The present invention provides a disposable safe injection device, consisting of a liquid cylinder, a needle head, a push rod and a sleeve ring; wherein, the needle head is combined with an inserting tenon in the front of the liquid cylinder, while the inserting tenon is internally provided with a fastening part; the joint between the inserting tenon and the top wall in the front of the liquid cylinder and the joint between the top wall and the outside cylinder ring are respectively provided with a C-shaped tearing slot and a ring tearing slot concentrically; a rod post with a clamping part is arranged in the rod front of the push rod, which extends axially and passes and fixes the sleeve ring so as to be contained in the liquid cylinder in a slide manner and push the push rod forward to make the sleeve ring be against the top wall; moreover, the fastening part is clamped at the fastening part in the inserting tenon and then pushes forward the push rod to tear apart the C-shaped tearing slot by force; meanwhile, a moment is formed at places without slots, which tears apart the comparatively thin parts of the ring tearing slots at the corresponding parts, the torn part spreads around, appearing a majority torn state; at this time, the push rod is pulled back to makes the ring tearing slot completely separate from the liquid cylinder by force.
Description
Technical field
The present invention is a kind of injection device, refers to a kind of disposable safety injecting device especially.
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) or all types of hepatitis 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.
On the whole existing high-safety injection tube, is by syringe needle, fluid cylinder and push rod be combined into.For example TaiWan, China is that " two formulas retraction safety syringe-drums " patent case of No. 540385 is an example in the notification number of on July 1st, 2003 bulletin, it has and can be provided with needle stand for cylindrical shell (fluid cylinder) end that push rod is inserted, this needle stand is formed with between periphery and cylindrical shell tears groove, needle stand be provided with one pertusate in seat, push rod can place the button piece that is buckled in perforation and constitutes a kind of safety syringe-drum being provided with respect to middle seat one end.So that after can fixing by push rod termination and needle stand, destroy simultaneously and tear groove when push rod retracts needle stand, make the needle stand that is fixed with entry needle move to inner barrel, with the unexpected injury generation that prevents that entry needle from exposing.
And the significant disappearance of this case is, and is thicker as if tearing the ditch slot thickness, for example 0.12mm, in the ejection formation process, this molten plastic liquid can pass through this gap smoothly, by with form pertusate in the seat, only it is difficult to because of the ditch slot thickness is thicker by by outside destroy, and loses disposable purpose.If tear the groove thinner thickness, 0.06mm for example, though it is easily by tearing groove by outside destroy, molten plastic liquid will be difficult to by crack between so thin, so that seat is difficult to the one ejection formation in pertusate.Moreover the plane of weakness design because of this fluid cylinder end face is torn groove may cause this needle stand in injection or transportation, via the moment that external force produced, and causes the situation of rocking to take place, even because of tearing the situation generation that breaking of groove will cause leakage.
In view of this, the present patent application people is in line with the experience of being engaged in safety injector design and production and marketing for many years, and the phase can overcome many disappearances of aforementioned high-safety injection tube, through experiment and test repeatedly, and then develops and " disposable safety injecting device " of the present invention.
Summary of the invention
Main purpose of the present invention is to provide a kind of disposable safety injecting device, it is by a fluid cylinder, one syringe needle, one push rod, reach a collar and form, wherein, this syringe needle is incorporated into the plug tenon of fluid cylinder front end, this plug tenon inside is provided with a snapping portion, and itself and fluid cylinder front end roof junction and roof and outer side neck ring junction are respectively equipped with that a concentric C shape is torn ditch and an annular is torn ditch; The shaft front end of this push rod extends axially a roofbolt with a clamping part, and it passes through and fixes this collar, so that be placed in the fluid cylinder slippingly; By pushing away before the push rod, make the collar prop up roof, clamping part then is snapped in the snapping portion in the plug tenon, pushes away before then push rod being continued, and makes this C shape tear ditch and tears because of stressed, do not form a moment to establishing the groove position simultaneously, thereby thin position thereby fracture that order is torn ditch to annular that should the position, and spread along periphery and to be big portion breaking state, at this moment, push rod is pulled back, make this annular tear the complete and fluid cylinder segregator in the stressed back of ditch.
Secondary objective of the present invention is to provide a kind of disposable safety injecting device, and it comprises a locating ring in addition, and it is socketed between plug tenon and the tube ring, and touches the fluid cylinder roof.Perhaps, the prominent seat ring of establishing of the needle stand back segment of this syringe needle, it is socketed between plug tenon encircles with tube, and the rear has the end of splaying, and it touches the fluid cylinder roof.
Another object of the present invention is to provide a kind of disposable safety injecting device 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.
Still a further object of the present invention is to provide a kind of disposable safety injecting device safety injector, wherein this fluid cylinder open rearward end is provided with a stopper section, it is the T-Ring to inner process, and the club head of push rod is made of forward and backward fin, and this two fin can be snapped in T-Ring and locate.
Another purpose of the present invention is to provide a kind of disposable safety injecting device 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.
Another object of the present invention is to provide a kind of disposable safety injecting device safety injector, wherein the shaft leading portion of this push rod at the roofbolt rear is provided with a club head and one first broken part in regular turn, this club head clip 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 first broken part push rod is fractureed immediately.Moreover this rear, first broken part is provided with a piston part and one second broken part in regular turn, and this piston part is embedded at the fluid cylinder front opening, and in second broken part push rod is fractureed.
Still a further object of the present invention is to provide a kind of disposable safety injecting device safety injector, wherein pull a little in this snapping portion and the C shape prominent top of establishing of roof inner face of tearing ditch, to push away before the convenient push rod, make clamping part be snapped in the interior snapping portion of plug tenon, and pull and pull a little in this top in the roofbolt top, make this C shape tear ditch and tear gradually, do not form a moment to establishing the groove position simultaneously, thereby order is torn thin position of ditch thereby fracture to annular that should the position because of stressed.Wherein pull and a little be positioned at this snapping portion and C shape is torn the ditch middle position in this top.And pull and a little be salient point or fin in this top.
So via enforcement of the present invention, it can make syringe needle be unlikely really and before push away after injection is reclaimed again, and prevent injection device effectively utilize the puzzlement that is produced again.And the end design of splaying of locating ring or syringe needle back segment seat ring, it is socketed between plug tenon encircles with tube, and it can be avoided because of having the situation that the plane of weakness designing institute of tearing ditch may cause plug tenon to rock, and further has the effect of leak-stopping.Moreover, after injection and injection, this fluid cylinder both ends open can be respectively club head and a tube piston part is sealed, and the syringe needle of order after using there be not possibility of exposing fluid cylinder extremely, thus the safety after the increase use.Into person is arranged especially, of the present inventionly tear the design that ditch and annular are torn ditch with intracardiac C shape, can be by, push rod then retracting institute's externally applied forces by before having been pushed away, and make roof fully separate with fluid cylinder together with plug tenon, syringe needle, and the formation self-destroying function really is a ware big good structure not seen before.
Description of drawings
Be further to disclose technology contents of the present invention, at first see also graphic, wherein:
Fig. 1 is the three-dimensional exploded view of injection device of the present invention;
Fig. 2 is of the present invention group of axonometric chart after upright;
Fig. 3 a and Fig. 3 b are the top view and the front sectional elevation of cartridge case of the present invention;
Fig. 4 draws the profile of medicinal liquid for fluid cylinder of the present invention;
The profile that Fig. 5 is injecting for the present invention;
Fig. 6 is injected to the profile of the end for the present invention;
Fig. 7 is the prominent local amplification profile that is snapped in snap ring of bar of the present invention;
Fig. 8 a and Fig. 8 b tear the local amplification profile of ditch in fracture process for fluid cylinder of the present invention;
Sketch map when Fig. 9 pulls back for push rod of the present invention;
The sketch map that Figure 10 fractures in the fluid cylinder open rearward end for push rod of the present invention;
Figure 11 is nested in the sketch map of fluid cylinder front opening for the bar plug of push rod of the present invention;
Figure 12 is another embodiment three-dimensional exploded view of safety injector of the present invention;
Figure 13 is the profile after of the present invention group of Figure 12 stands.
The specific embodiment
As shown in Figures 1 to 4, basically, disposable syringe device of the present invention is by a fluid cylinder 1, one syringe needle 2, one push rods 3, and a collar 4 is formed.
Wherein, fluid cylinder 1 is a hollow form, and its chamber of inner tool 11 is for ccontaining medicinal liquid, and its rear then is provided with a pair of fin 12, so that supply the usefulness of user gripping.And the plug tenon 14 of less and central tool one through hole 141 of fluid cylinder 1 front end roof 13 tools, one external diameter.Shown in Fig. 3 a and Fig. 3 b, then be provided with the tool thickness between this plug tenon 14 and roof 13 and roof 13 and the outer side neck ring 15 respectively and change, for example the C shape of 0.12mm and 0.6mm is torn ditch 16 and an annular is torn ditch 17.In addition, these plug tenon 14 inwalls are inwardly prominent establishes a snapping portion 142, and its and C shape are torn roof 13 inner faces of ditch 16, and for example C shape tears that ditch 16 middle positions are prominent to be established one and push up and pull a little 131.Wherein, this top 131 purposes that are provided with of pulling a little are the concentrated usefulness of the application of force, therefore, can be salient point or fin during enforcement, tear tearing of ditch 16 in order to this C shape.
In addition, the inwardly prominent stopper section 18 of establishing of these chamber 11 nearly open rearward end, T-Ring for example, the buckle of the forward and backward bar wing 331,332 of two periphery tool bevels of the club head 33 of itself and push rod 3 is in order to the location of push rod 3 and fractureing of bar neck 37.
Particularly, in addition a locating ring 5 is socketed on plug tenon 14 and encircles between 15 with tube, it must be made for hard or soft material, but with soft elastic material, for example elastomeric material is good.In addition, this locating ring 5 touches roof 13, can avoid taking place because of the situation that the two plane of weakness designing institutes of tearing ditch 16,17 may cause this plug tenon 14 to rock, and tears ditch 16,17 as if two simultaneously and breaks accidentally, and this locating ring 5 is also further born the effect of leak-stopping.
So this locating ring 5 is provided with purpose and is: (1) prevents that plug tenon 14 is subjected to the moment that external force produces and causes two crackings of tearing ditch 16,17; And (2) prevent that two tear the leakage of medicament behind ditch 16,17 crackings, even if because of accident causes slight leakage, makes the present invention still not lose the function of injection.
Wherein, this club head 33 is that 331,332 of forward and backward fins by two periphery tool bevels constitute, and in the stopper section 18, is first broken part 37 of retraction shape 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.
And the present invention is provided with in these 37 rears, first broken part and is provided with second broken part 39 that a piston part 38 and also is the retraction shape in regular turn, for example fills in neck.
The collar 4 is made for soft material, only 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.
Please consult graphic again, the present invention is sleeved on roofbolt 34 with the collar 4 earlier in group immediately, clamping part 36 is passed by axis hole 43, and the two ring wings 351,352 are socketed on annular distance 42, then be nested into push rod 3 in the tube chamber 11 of fluid cylinder 1 together with the collar 4, and syringe needle 2 is nested in plug tenon 14 by needle stand 22, promptly presents as Fig. 2 and axonometric chart and profile shown in Figure 4, and can be the medicinal liquid state that draws.
As shown in Figure 5, draw medicinal liquid after, and injection or when injection are with push rod before pointing 3, make 11 reaches along the tube chamber of its front end collar 4, and the extruding medicinal liquid, make it pass through plug tenon 14 and syringe needle 2, and are injected in the body.
As shown in Figure 6, when the collar 4 together with push rod 3 pushing and withstanding to fluid cylinder 1 front end roof 13, make extruding that medicinal liquid is, and clamping part 36 stretched in the through hole 13, it is minimum that medicinal liquid remnants are reduced to.
When injected appropriate after, as shown in Figure 7, will push away before this push rod 3, make clamping part 36 be snapped in snapping portion 142 in the plug tenon 14, and the forward and backward ring wing 351,352 of sliding part 35 props up roof 13 because of the collar 4, and moves on, and enter respectively in the ring casing 41.
Shown in Fig. 8 a, before continuing, push rod 3 pushes away, its roofbolt 34 top is in advance pulled and is pulled a little 131 in the top, making this C shape tear ditch 16 tears gradually because of stressed, do not form a moment to establishing the groove position simultaneously, thereby order is torn ditch 17 thin position thereby fractures to annular that should the position, and spreads along periphery, does not only form complete breaking state.
Shown in Fig. 8 b, at this moment, push rod 3 is inwardly withdrawn, make this annular tear ditch 17 and separate with fluid cylinder 1 fully after stressed.As shown in Figure 9, to tube chamber 11, stopper section 18 and club head 35 formation clips up to tube chamber 11 open rearward end make push rod 3 unlikely possibilities of pulling back again to this push rod 3, can effectively prevent to re-use together with the collar 4, plug tenon 14, locating ring 5 and syringe needle 2 post-tensionings.
As shown in figure 10, at this moment, can push rod 3 be fractureed, the some of syringe needle 2, push rod 3 and the collar 4 are resided in the chamber 11 via 37 places, first broken part.
As shown in figure 11, 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.
As Figure 12 and shown in Figure 13, be another embodiment of disposable safety injecting device of the present invention, its assembly that is same as previous embodiment is same names and label representative all, be and can be rated as unique difference, present embodiment does not have the setting of locating ring, at the then prominent seat ring 24 of establishing of needle stand 22 back segments of syringe needle 2, it is socketed between plug tenon 14 and the tube ring 15, and the rear has the end 241 of splaying.
This end 241 of splaying touches roof 16, and this measure can be avoided taking place because of the situation that the two plane of weakness designing institutes of tearing ditch 16,17 may cause this plug tenon 14 to rock, and tears ditch 16,17 as if two simultaneously and breaks accidentally, and this end 241 of splaying is also further born the effect of leak-stopping.
Disclosed, be a kind of of preferred embodiment, patent right category of the present invention is not all taken off in partial such as change or modification and come from technological thought of the present invention and be easy to the person of knowing by inference by the people who has the knack of this skill.
Claims (12)
1. disposable safety injecting device, it is by a fluid cylinder, one syringe needle, one push rod, reach a collar and form, it is characterized in that this syringe needle is incorporated into the plug tenon of fluid cylinder front end, this plug tenon inside is provided with a snapping portion, and itself and fluid cylinder front end roof junction and roof and outer side neck ring junction are respectively equipped with that a concentric C shape is torn ditch and an annular is torn ditch; The shaft front end of this push rod extends axially a roofbolt with a clamping part, and it passes through and fixes this collar, so that be placed in the fluid cylinder slippingly.
2. disposable safety injecting device as claimed in claim 1 is characterized in that, this C shape is torn ditch or an annular and torn ditch and all have thickness and change.
3. disposable safety injecting device as claimed in claim 1 is characterized in that other comprises a locating ring, and it is socketed between plug tenon and the tube ring, and touches the fluid cylinder roof.
4. disposable safety injecting device as claimed in claim 1 is characterized in that, 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. disposable safety injecting device as claimed in claim 1 is characterized in that, this fluid cylinder open rearward end is provided with a stopper section, and it is the T-Ring to inner process, and the club head of push rod is made of forward and backward fin, and this two fin is snapped in T-Ring and locatees.
6. disposable safety injecting device as claimed in claim 1 is characterized in that, the radially prominent sliding part of establishing of this roofbolt, and it is that forward and backward ring plate by two periphery tool bevels is constituted.
7. disposable safety injecting device as claimed in claim 1 is characterized in that, the prominent seat ring of establishing of the needle stand back segment of this syringe needle, and it is socketed between plug tenon encircles with tube, and the rear has the end of splaying, and it touches the fluid cylinder roof.
8. disposable safety injecting device as claimed in claim 1, it is characterized in that, the shaft leading portion of this push rod at the roofbolt rear is provided with a club head and one first broken part in regular turn, this club head clip 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 first broken part push rod is fractureed immediately.
9. disposable safety injecting device as claimed in claim 8 is characterized in that, this rear, first broken part is provided with a piston part and one second broken part in regular turn, and this piston part is embedded at the fluid cylinder front opening, and in second broken part push rod is fractureed.
10. disposable safety injecting device as claimed in claim 1 is characterized in that, this snapping portion and C shape are torn the prominent top of establishing of roof inner face of ditch and pulled a little.
11. disposable safety injecting device as claimed in claim 10 is characterized in that, pull and a little be positioned at this snapping portion and C shape is torn the ditch middle position in this top.
12. disposable safety injecting device as claimed in claim 10 is characterized in that, pull and a little be salient point or fin in this top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101098233A CN100536950C (en) | 2006-08-16 | 2006-08-16 | Disposable safety injecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101098233A CN100536950C (en) | 2006-08-16 | 2006-08-16 | Disposable safety injecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101125230A CN101125230A (en) | 2008-02-20 |
| CN100536950C true CN100536950C (en) | 2009-09-09 |
Family
ID=39093419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101098233A Expired - Fee Related CN100536950C (en) | 2006-08-16 | 2006-08-16 | Disposable safety injecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100536950C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102631730B (en) * | 2012-05-03 | 2013-07-10 | 蔡根顺 | Ejection-type self-destructive syringe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM274964U (en) * | 2005-05-19 | 2005-09-11 | Chang-Tsz Chen | Self-destructive safety injector |
-
2006
- 2006-08-16 CN CNB2006101098233A patent/CN100536950C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM274964U (en) * | 2005-05-19 | 2005-09-11 | Chang-Tsz Chen | Self-destructive safety injector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101125230A (en) | 2008-02-20 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20120816 |