CN201168296Y - Disposable safe syringe - Google Patents

Disposable safe syringe Download PDF

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Publication number
CN201168296Y
CN201168296Y CNU2008200334869U CN200820033486U CN201168296Y CN 201168296 Y CN201168296 Y CN 201168296Y CN U2008200334869 U CNU2008200334869 U CN U2008200334869U CN 200820033486 U CN200820033486 U CN 200820033486U CN 201168296 Y CN201168296 Y CN 201168296Y
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CN
China
Prior art keywords
syringe
push rod
piston
hole
disposible safety
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 - Fee Related
Application number
CNU2008200334869U
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Chinese (zh)
Inventor
王家华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CNU2008200334869U priority Critical patent/CN201168296Y/en
Application granted granted Critical
Publication of CN201168296Y publication Critical patent/CN201168296Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

A one-off safety injector belongs to medical apparatus and includes a syringe, a pinhead and a push rod. The pinhead is arranged at the bottom end of the syringe, in which the push rod is arranged. The one-off safety injector is characterized in that two pistons which are tensely and densely stuck with the internal wall of the syringe are arranged in the syringe; a first piston is arranged between the bottom end of the push rod and the bottom end of the syringe and is not connected with the push rod; a hole is arranged in the middle of a second piston; the push rod passes through the hole; the bottom end of the push rod is provided with a retaining device for retaining the second piston. The one-off safety injector has simple structure, is conveniently used and solves the problem of multiple use of the one-off injector in the prior art.

Description

Disposible safety syringe
Technical field
This utility model relates to a kind of medical apparatus, specifically is a kind of disposible safety syringe.
Background technology
At present, disposable syringe is by name disposable, but owing to its construction features, can repeatedly use.Especially utilized as repeatedly using by some, disease is infected mutually, abnormally dangerous.
Summary of the invention
This utility model has proposed a kind of new disposible safety syringe in order to solve the above-mentioned problems in the prior art, and concrete technical scheme is as follows:
A kind of disposible safety syringe comprises syringe, syringe needle and push rod, and syringe needle is located at the syringe bottom, push rod is located in the syringe, it is characterized in that being provided with in syringe 2 pistons that fit tightly with the syringe inwall, first piston is located between push rod bottom and the syringe bottom, is not connected with push rod; Be provided with the hole in the middle of second piston, push rod passes this hole, and the push rod bottom is provided with the retention device that stops second piston.
Described retention device is the thin slice that is connected in the push rod bottom.
Described retention device can also be the push rod cup that is connected in the push rod bottom, and push rod cup becomes triangular form, and the shape in the hole of second piston is corresponding with this triangle.Described push rod cup is provided with the push rod cup sealing ring.
The top of described syringe is provided with the syringe lid, is provided with the hole in the syringe lid, and push rod passes this hole.Described first and second piston is provided with piston packing.When syringe does not use, between described first and second piston apart from 3-5mm.
This utility model is simple in structure, the reused problem of disposable syringe of the prior art that solved easy to use.
Description of drawings
Fig. 1 is this utility model assembling sketch map
Fig. 2 is the assembling sketch map of push rod in this utility model example 2
Syringe 1, syringe needle 2, push rod 3, first piston 4, second piston 5, push rod cup 7, syringe lid 6, push rod cup sealing ring 8, piston packing 9
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment this utility model is described further.
A kind of disposible safety syringe comprises syringe 1, syringe needle 2 and push rod 3, and syringe needle 2 is located at syringe 1 bottom, and push rod 3 is located in the syringe 1.Be provided with 2 pistons that fit tightly with the syringe inwall in syringe 1, first piston 4 is located between push rod 3 bottoms and syringe 1 bottom, is not connected with push rod 3; Be provided with the hole in the middle of second piston 5, push rod 3 passes this hole, and push rod 3 bottoms are provided with the retention device that stops second piston 4.
In the example 1, described retention device is the thin slice that is connected in push rod 3 bottoms.
In the example 2, described retention device is the push rod cup 7 that is connected in push rod 3 bottoms, 7 one-tenth triangular forms of push rod cup, and the shape in the hole of second piston 4 is corresponding with this triangle, a similar horn mouth.This push rod cup 7 is provided with push rod cup sealing ring 8.
In the example 1,2, the top of described syringe 1 is provided with syringe lid 6, is provided with the hole in the syringe lid 6, and push rod 3 passes this hole.
Described first and second piston 4,5 is provided with piston packing 9.
When syringe does not use, between described first and second piston 4,5 apart from 3-5mm, 4mm preferably.
With the syringe in the example 2 is that example illustrates that operation principle of the present utility model is as follows:
1, this syringe is when push rod is upwards twitched, push rod cup sealing ring on the push rod cup is tight against the horn mouth of second piston, makes the space between the first piston and second piston be tending towards vacuum, when second piston is upwards twitched, first piston is also upwards twitched thereupon, sucks medicinal liquid by syringe needle.
2, finish when medicinal liquid sucks, when entering injecting program, push rod promotes downwards, makes it break away from second piston, and directly promotes first piston, and medicinal liquid by syringe needle, is injected syringe.
3, this syringe is after using once, and first piston has been pushed to the syringe bottom, and second piston still rests on syringe top (near the syringe place), first piston can't have been sucted and sucks liquid medicine, and syringe is promptly scrapped voluntarily.

Claims (7)

1, a kind of disposible safety syringe comprises syringe, syringe needle and push rod, and syringe needle is located at the syringe bottom, push rod is located in the syringe, it is characterized in that being provided with in syringe 2 pistons that fit tightly with the syringe inwall, first piston is located between push rod bottom and the syringe bottom, is not connected with push rod; Be provided with the hole in the middle of second piston, push rod passes this hole, and the push rod bottom is provided with the retention device that stops second piston.
2, disposible safety syringe according to claim 1 is characterized in that described retention device is the thin slice that is connected in the push rod bottom.
3, disposible safety syringe according to claim 1 is characterized in that described retention device is the push rod cup that is connected in the push rod bottom, and push rod cup becomes triangular form, and the shape in the hole of second piston is corresponding with this triangle.
4, disposible safety syringe according to claim 3 is characterized in that described push rod cup is provided with the push rod cup sealing ring.
5, according to claim 2 or 3 or 4 described disposible safety syringes, it is characterized in that the top of described syringe is provided with the syringe lid, be provided with the hole in the syringe lid, push rod passes this hole.
6, disposible safety syringe according to claim 5 is characterized in that described first and second piston is provided with piston packing.
7, disposible safety syringe according to claim 6 is characterized in that when syringe does not use, between described first and second piston apart from 3-5mm.
CNU2008200334869U 2008-03-21 2008-03-21 Disposable safe syringe Expired - Fee Related CN201168296Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200334869U CN201168296Y (en) 2008-03-21 2008-03-21 Disposable safe syringe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200334869U CN201168296Y (en) 2008-03-21 2008-03-21 Disposable safe syringe

Publications (1)

Publication Number Publication Date
CN201168296Y true CN201168296Y (en) 2008-12-24

Family

ID=40207350

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200334869U Expired - Fee Related CN201168296Y (en) 2008-03-21 2008-03-21 Disposable safe syringe

Country Status (1)

Country Link
CN (1) CN201168296Y (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081224

Termination date: 20120321