CN201094785Y - Disposable safety self-destroyed syringe - Google Patents
Disposable safety self-destroyed syringe Download PDFInfo
- Publication number
- CN201094785Y CN201094785Y CNU2007200799024U CN200720079902U CN201094785Y CN 201094785 Y CN201094785 Y CN 201094785Y CN U2007200799024 U CNU2007200799024 U CN U2007200799024U CN 200720079902 U CN200720079902 U CN 200720079902U CN 201094785 Y CN201094785 Y CN 201094785Y
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- CN
- China
- Prior art keywords
- syringe
- push rod
- needle stand
- groove
- safety self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a disposable safe self-destruction injector which belongs to the field of medical appliance. Aiming at the problem that the injection in the prior art can not completely realize safe self-destruction automatically, the structure of the utility model includes a hollow pin case, a push rod, a pin seat that can be separately assembled at the front end of the pin case, a rubber plug blocking at the front end of the push rod, a sealing element A assembled at the tail part of the pin case and a sealing element B assembled at the tail part of the push rod. A ventilating hole A is arranged in the middle of the sealing element B. The front end of the push rod is provided with an outer edge and an inward salient. The body of a hollow rod near the front end of the push rod is provided with a ventilating hole B which can be communicated with the gas closed by the outer edge and the sealing element A at the back end of the pin case. When injecting, negative pressure is formed as the size increasing of the gas in the body of the push rod; the pinhead is absorbed back into the push rod by utilizing the difference of the positive and negative pressure in front and back of the push rod. Compared with the prior art, the utility model can automatically retract the pinhead, has simple structure, is convenient to use, can effectively avoid repeated use of the injector and can also prevent a nurse from being hurt by the pinhead.
Description
Technical field
This utility model belongs to medical instruments field, but relates in particular to a kind of disposable safety self-breaking injector of automatic whip-back needle.
Background technology
Common disposable sterilized injector is after use, and its structure and shape are reused by the people easily without any change, causes infecting.Investigate with regard to the ratio of reusing syringe or pin all over the world according to World Health Organization (WHO), countries such as area, Africa, China, India are because of poverty and material want, the someone reclaims Biohazard Waste regeneration use for a long time, cause syringe to repeat to abuse ratio up to 50%, even at developed countrieses such as Europe, reuse syringe also up to 15%.Distinguish syringe at present all over China and have serious reusable problem.And at present there is complex structure on the market safety self-destructing syringe major part, and the volume production difficulty is big, and mostly the self-destruction form is to rely on medical personnel manually to finish, and has increased medical personnel's workload.
As publication number is CN1857746, the Chinese invention patent application of " a kind of safe low-resistance syringe with withdrawn needle " by name, a kind of syringe of retractable needle is disclosed, the groove that the elasticity support claw of inside undergauge molding gradually and push rod head and elasticity support claw fasten bottom needle holder, groove is with after support claw combines, by manpower push rod is pulled back, syringe needle can be retracted in the syringe.
And for example publication number is CN1631460, the patent application of " safety syringe-drum " by name, a kind of syringe that syringe needle is bounced back automatically by positive and negative pressure is disclosed, its method is that hollow ram is bled, after being reduced, pressure covers tail-hood again, close certain negative-pressure gas, utilize the pressure reduction that push rod is interior and syringe is interior to make syringe needle retract in the syringe automatically.Its weak point is and need could realizes negative pressure by manually bleeding, and complicated operation has increased medical personnel's workload.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art; provide a kind of and can realize negative pressure automatically, but and the disposable syringe of automatic whip-back needle, simple in structure, easy to operate; not only can effectively avoid the repeated use of syringe, can also protect medical personnel not stabbed by syringe needle.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of disposable safety self-breaking injector that the utility model proposes comprises syringe, and the push rod that can slide in syringe is stuck in the rubber stopper of push rod front end, is mounted on the needle stand of syringe front end separatably.Described rubber stopper front end is an astringent groove forward, and the longitudinal cross-section shape of groove can be trapezoidal or T shape or other shape etc.Described needle stand is positioned at the outer part of syringe and is connected with syringe needle, be positioned at syringe inside at needle stand and be arranged with an edge clipping, the diameter of edge clipping greater than needle stand in syringe and away from partly diameter between end of syringe front end and the edge clipping.The front end bore of described groove, is wrapped in needle stand in the groove in syringe and away from an end of syringe front end and the part between the edge clipping so that can block needle stand in the edge clipping position less than the diameter of edge clipping; The degree of depth of groove can be positioned at the height of syringe less than needle stand, so that can rubber stopper be pushed up in push rod by needle stand in use; The degree of depth of groove also can be equal to or greater than the height that needle stand is positioned at syringe, so that can rubber stopper be pushed up in push rod by the power of syringe front end in use.The structure of described push rod comprises hollow shaft, the abducent outer rim of front end and inside projection; The external diameter of outer rim and the internal diameter of syringe equate or are a bit larger tham the internal diameter of syringe, so that push rod front end and syringe inwall are combined closely and push rod is slided in syringe; The shape of projection and rubber stopper is complementary, and rubber stopper can be stuck in the front end of push rod, and the salable firmly liquid or the gas of syringe front end do not enter in the push rod; Have a passage second near on the shaft of push rod front end, can be with the gas communication between the gas in the push rod shaft and syringe and the push rod outer wall; The afterbody of push rod is provided with the sealing member second that has the passage first in the middle of one.The sealing member first of perforate in the middle of the afterbody of described syringe is provided with, the size in its hole and the external diameter of push rod shaft equate or are slightly smaller than the external diameter of shaft, so that the shaft of push rod passes through this hole and syringe closely contacts also slidably.
Described passage first is provided with a piston seal film, and its shape size adapts with the passage first, and this piston seal film can be used for sealing up the passage first.In when injection, can block passage first on the push rod tail seal part second with finger, or seal up this passage first with piston seal film.The inside projection of described push rod front end can be an annular, also can be at least two equally distributed fasteners etc.
Compared with prior art, the beneficial effects of the utility model are: by form negative pressure automatically in push rod, utilize the positive and negative pressure of push rod front and back that syringe needle is sucked back in the push rod, make the syringe self-destruction, realized disposable purpose, and this syringe construction is simple, easy to operate, safe in utilization.
Description of drawings
Fig. 1 is the cutaway view of disposable safety self-breaking injector.
Push rod and needle stand structure combining sketch map when Fig. 2 is injection.
Fig. 3 is the structural representation of needle stand retraction after injection finishes.
The cutaway view of the disposable safety self-breaking injector when Fig. 4 is to use piston seal film.
Fig. 5 is the pusher structure cutaway view of projection when being annular.
Fig. 6 is the A-A cutaway view of projection among Fig. 5.
Fig. 7 is the pusher structure cutaway view of projection when being two uniform distribution fasteners.
Fig. 8 is the A-A cutaway view of projection among Fig. 7.
Number in the figure is as follows:
1 syringe, 2 push rods, 3 rubber stoppers
4 needle stands, 5 sealing member first, 6 sealing member second
7 projections, 8 passage first, 9 passage second
10 edge clippings, 11 grooves, 12 piston seal films
13 outer rims
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment one
As Fig. 1, Fig. 2, Fig. 3, Fig. 5, shown in Figure 6.The structure that makes disposable safety self-breaking injector comprises hollow barrel 1, the push rod 2 that can slide, is stuck in the rubber stopper 3 of push rod 2 front ends, is mounted on the needle stand 4 of syringe 1 front end, the syringe needle that is mounted on needle stand 4 front ends, sealing member first 5 and sealing member second 6 separatably in syringe 1.The centre of sealing member first 5 has the hole, be mounted on the afterbody of syringe 1, the size in its hole equates with the external diameter of push rod 2 shafts, so that the time can pass the shaft of push rod 2 in assembling sealing member first 5 is assembled in syringe 1 afterbody, can closely contact also with the shaft of push rod 2 after assembling and to make the shaft of push rod 2 can slide up and down by sealing member first 5.Needle stand 4 is mounted on the front end of syringe 1 separatably, needle stand 4 is positioned at syringe 1 outer part and is connected with syringe needle, be positioned at syringe 1 inside at needle stand 4 and be arranged with an edge clipping 10, the diameter of edge clipping 10 greater than needle stand 4 in syringe 1 and away from the diameter of part between end of syringe 1 front end and the edge clipping 10.The structure of push rod 2 comprises hollow shaft, the abducent outer rim 13 of front end and inside circular protrusion 7, the external diameter of outer rim 13 equates with the internal diameter of syringe 1, so that push rod 2 front ends can be combined closely with syringe 1 inwall by outer rim 13 and push rod 2 is slided in syringe 1; Circular protrusion 7 is complementary with the shape of rubber stopper 3, rubber stopper 3 can be stuck in the front end of push rod 2, and the salable firmly liquid or the gas of syringe 1 front end do not enter in the push rod 2.Rubber stopper 3 front ends are an astringent groove 11 forward, the longitudinal cross-section of groove 11 is shaped as trapezoidal, the front end bore of groove 11 is less than the diameter of edge clipping 10, so that can block needle stand 4 in edge clipping 10 positions, needle stand 4 is wrapped in the groove 11 in syringe 1 and away from an end and the part between the edge clipping 10 of syringe 1 front end, and the degree of depth of groove 11 is positioned at the height of syringe 1 less than needle stand 4, so that can rubber stopper 3 be pushed up in push rod 2 by the power of needle stand 4 in use.Near having a passage second 9 on the shaft of push rod 2 front ends, can make the gas communication that gas and syringe 1 rear end in push rod 2 shafts sealed by outer rim 13 and sealing member first 5.The afterbody of push rod 2 is provided with the sealing member second 6 that has passage first 8 in the middle of one, refills sealing member second 6 after to be sealed first 5 assembles, and the size of passage first 8 is less than people's thumbnail size.
In use, earlier with in the injection suction syringe 1, block passage first 8 with thumb then, push rod 2 start injections forward, because the gas communication that the gas in push rod 2 shafts and syringe 1 rear end are sealed by outer rim 13 and sealing member first 5, when syringe 1 front end liquid volume reduces, the gas volume of syringe 1 rear end increases, then the pressure of gas reduces, and causes the pressure in push rod 2 shafts also to reduce, and forms negative pressure; When push rod 2 is pushed into syringe 1 bottom, and when groove 11 blocks edge clipping 10, syringe is extracted from receptor, and then continue push rod 2 forward, because the degree of depth of groove 11 is positioned at the height of syringe 1 less than needle stand 4, so when needle stand 4 is positioned at syringe 1 and contacts with rubber stopper 3 away from an end of syringe 1 front end, needle stand 4 gives rubber stopper 3 one power backward, make rubber stopper 3 be pushed up from projection 7, in push rod 2, in push rod 2, bounce back under the attraction of negative pressure simultaneously, the front end of the convergent part groove 11 of rubber stopper 3 blocks edge clipping 10 when retraction, and needle stand 4 is sucked back in the push rod 2 in the lump together with syringe needle, finishes self-destruction.From the whole process of injection beginning in the sucked back push rod 2 of syringe needle, thumb is blocking up passage first 8 always.
Embodiment two
As Fig. 4, Fig. 7, shown in Figure 8.Repeat no more with content identical among the embodiment one, difference is:
The size of perforate is slightly smaller than the external diameter of push rod 2 shafts in the middle of the sealing member first 5 of syringe 1 afterbody.The external diameter of outer rim 13 is a bit larger tham the internal diameter of syringe 1.Push rod 2 inside projections 7 are two symmetric fasteners, there are two shapes and size and the corresponding symmetrical bayonet socket of fastener in the middle part that is shaped as of rubber stopper 3, rubber stopper 3 just in time is stuck on the projection 7, and the salable firmly liquid or the gas of syringe 1 front end do not enter in the push rod 2.The longitudinal cross-section of the groove 11 of rubber stopper 3 is a T shape, and the degree of depth of groove 11 equals the height that needle stand 4 is positioned at syringe 1, so that can rubber stopper 3 be pushed up in push rod 2 by the power of syringe 1 front end in use.In addition, also be provided with a piston seal film 12 on passage first 8, available piston seal film 12 replaces the finger among the embodiment one to clog passage first 8 when injection, realizes negative pressure in push rod 2, finishes the syringe self-destruction.
Embodiment three
Repeat no more with content identical among the embodiment one, difference is: push rod 2 inside projections 7 are 4 equally distributed fasteners, there is the corresponding evenly bayonet socket of 4 shapes and size and fastener at the middle part that is shaped as of rubber stopper 3, and rubber stopper 3 just in time is stuck on the projection 7.The degree of depth of groove 11 is positioned at the height of syringe 1 greater than needle stand 4, so that can rubber stopper 3 be pushed up in push rod 2 by the power of syringe 1 front end in use.
Claims (8)
1. disposable safety self-breaking injector, comprise hollow barrel (1), the push rod (2) that can in syringe (1), slide, be stuck in the rubber stopper (3) of push rod (2) front end, be mounted on the needle stand (4) of syringe (1) front end separatably, needle stand (4) is positioned at the outer part of syringe (1) and is connected with syringe needle, be positioned at syringe (1) inside at needle stand (4) and be arranged with an edge clipping (10), the diameter of edge clipping (10) is positioned at syringe (1) greater than needle stand (4) and away from the diameter of part between end of syringe (1) front end and the edge clipping (10), rubber stopper (3) front end is an astringent groove (11) forward, the front end bore of groove (11) is less than the diameter of edge clipping (10), it is characterized in that: the structure of push rod (2) comprises the hollow shaft, abducent outer rim of front end (13) and inside projection (7), the external diameter of outer rim (13) and the internal diameter of syringe (1) equate or are a bit larger tham the internal diameter of syringe (1), projection (7) is complementary with the shape of rubber stopper (3), rubber stopper (3) can be stuck in the front end of push rod (2), and the salable firmly liquid or the gas of syringe (1) front end do not enter in the push rod (2), have a passage second (9) near on the shaft of push rod (2) front end, the afterbody of push rod (2) is provided with the sealing member second (6) that has passage first (8) in the middle of one; The sealing member first (5) of perforate in the middle of the afterbody of syringe (1) is provided with, the size in its hole and the external diameter of push rod (2) shaft equate or are slightly smaller than the external diameter of shaft.
2. disposable safety self-breaking injector according to claim 1 is characterized in that: passage first (8) is provided with a piston seal film (12).
3. disposable safety self-breaking injector according to claim 1 and 2 is characterized in that: described projection (7) is annular, or is two equally distributed fasteners.
4. disposable safety self-breaking injector according to claim 1 and 2 is characterized in that: the longitudinal cross-section shape of groove (11) is trapezoidal, or T shape.
5. disposable safety self-breaking injector according to claim 3 is characterized in that: the longitudinal cross-section shape of groove (11) is trapezoidal, or T shape.
6. according to claim 1 or 2 or 5 described disposable safety self-breaking injectors, it is characterized in that: the degree of depth of groove (11) is equal to or greater than the height that needle stand (4) is positioned at syringe (1).
7. disposable safety self-breaking injector according to claim 3 is characterized in that: the degree of depth of groove (11) is equal to or greater than the height that needle stand (4) is positioned at syringe (1).
8. disposable safety self-breaking injector according to claim 4 is characterized in that: the degree of depth of groove (11) is equal to or greater than the height that needle stand (4) is positioned at syringe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200799024U CN201094785Y (en) | 2007-06-11 | 2007-06-11 | Disposable safety self-destroyed syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200799024U CN201094785Y (en) | 2007-06-11 | 2007-06-11 | Disposable safety self-destroyed syringe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201094785Y true CN201094785Y (en) | 2008-08-06 |
Family
ID=39921843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200799024U Expired - Lifetime CN201094785Y (en) | 2007-06-11 | 2007-06-11 | Disposable safety self-destroyed syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201094785Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100479874C (en) * | 2007-06-11 | 2009-04-22 | 成都普什医药塑料包装有限公司 | Disposable safety self-breaking injector |
| CN104027872A (en) * | 2014-06-13 | 2014-09-10 | 陈江 | Easy-to-destroy syringe |
-
2007
- 2007-06-11 CN CNU2007200799024U patent/CN201094785Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100479874C (en) * | 2007-06-11 | 2009-04-22 | 成都普什医药塑料包装有限公司 | Disposable safety self-breaking injector |
| CN104027872A (en) * | 2014-06-13 | 2014-09-10 | 陈江 | Easy-to-destroy syringe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20070611 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |