CN208864944U

CN208864944U - Gear-type syringe

Info

Publication number: CN208864944U
Application number: CN201721815414.5U
Authority: CN
Inventors: 刘涛; 杨舒文; 李亚琦
Original assignee: TIANJIN HANACO MEDICAL CO Ltd
Current assignee: TIANJIN HANACO MEDICAL CO Ltd
Priority date: 2017-12-22
Filing date: 2017-12-22
Publication date: 2019-05-17
Anticipated expiration: 2027-12-22

Abstract

A kind of gear-type syringe, it is made of injection tube and piston, more notches are set on piston push rod as limit, and cooperate gear card on injection tube, needing to stop push-and-pull piston, pause can enter gear card insertion in limit when aspirating fluid injection or injection, fix the relative position of piston and injection tube, relative displacement is maximally reduced, is avoided because of leakage caused by shaking and sucking air.

Description

Gear-type syringe

Technical field

The utility model relates to a kind of gear-type syringes.

Background technique

Injection is clinically used treatment method, and syringe is most common clinical treatment instrument, when in use general meeting By two processes, first is that suction fluid injection is likely to be related to segmented behaviour in suction fluid injection and injection process second is that injecting Make, such as when needing to inject two kinds of medical fluids it is necessary to extracting medical fluid from different flask for medicinal preparations respectively, or in infusion medicine-feeding, Divided dose is needed to be administered, multiple injection.Syringe is the principle pumping liquid that negative pressure in injection tube is realized by rubber plug sealing, because After aspirating certain liq, if stopping exerting a force to piston, piston is likely due to cylinder pressure and shakes, so as to cause leakage for this Liquid or sucking air, these, which can all operate clinical injection, has an adverse effect.

Summary of the invention

In view of the shortcomings of the prior art, the utility model provides a kind of gear-type syringe, on piston push rod More notches are set as limit, and cooperate the gear card on injection tube, is needing to stop push-and-pull piston, is temporarily aspirating fluid injection or injection When gear card insertion can be entered in limit, fix the relative position of piston and injection tube, maximally reduce relative displacement, It avoids because of leakage caused by shaking and sucking air.

To achieve the above object, used technical solution is the utility model: a kind of gear-type syringe, by injection tube It is formed with piston, the both ends of the injection tube are respectively injection port and piston mouth, and piston is described from piston mouth insertion injection tube Piston is made of Capsule and push rod, push rod, there is four ribs, and radial section is cross, and push rod both ends are respectively Capsule end and hand Pommel, Capsule end and handle end are round sheet, and Capsule is socketed on Capsule end, close to piston mouth on the injection tube inner wall Position be additionally provided with a gear card, the gear card is arc-shaped flaky, and less than 80 °, one end of gear card is additionally provided with centering angle The Capsule end of baffle, the push rod is equipped with an arc notch corresponding with gear card, and arc notch is located at any two ribs Between, multiple spacing breach, the size and gear of spacing breach are also evenly distributed on the rib without baffle side on gear card The thickness of card matches.

Handle end on the push rod is additionally provided with a code notches, and the arc on the code notches and Capsule end lacks Mouth is located in the same section quadrant.

When assembly, Capsule is socketed in outside Capsule end first, then by Capsule position pair corresponding to code notches position Quasi- gear card, is finally pushed into injection tube for piston, in use, pull piston makes to fill medical fluid in injection tube first, is then needing When stopping fluid injection, or injection rotates piston, is caught in gear card in spacing breach when needing to suspend, and turns at baffle and is Only, piston position is i.e. locked, finally, rotating backward piston when needing to continue fluid injection or injection, so that gear card is detached from limit and lacks The limitation of mouth, can unlock lock state.

The beneficial effects of the utility model are: being needed never in carrying out suction fluid injection and injection process using syringe With flask for medicinal preparations in extract medical fluid respectively when, or in infusion process divided dose dosing is needed, when multiple injection, when stopping to piston Force, so that it may rotation piston in place is stuck on the gear card of injection tube inner wall using the spacing breach on push rod, from And the relative position of fixed piston and injection tube, avoid because shake and caused by leakage and sucking air, to the full extent for Patient has evaded the clinical risk of injection operation.And the baffle on gear card, it so that operator is perceived rotation operation and arrive Position, and can limit the rotation terminal of push rod, avoid rotating it is not in place or excessively caused by tripping.In addition, being marked on handle end The design of notch provides convenience when being also the production, and operator does not need touch searching can be it is clear that arc The position of v notch v, assembly manipulation have also been easy very much.

Detailed description of the invention

Fig. 1 the utility model prior art construction schematic diagram；

Fig. 2 the utility model schematic diagram of product structure；

Fig. 3 the utility model injection tube main view；

Fig. 4 the utility model injection tube bottom view；

Fig. 5 the utility model piston structure schematic diagram；

Fig. 6 the utility model push rod top view；

Fig. 7 the utility model push rod A-A sectional view；

Fig. 8 the utility model push rod B-B sectional view；

Fig. 9 the utility model second embodiment piston structure schematic diagram；

Figure 10 the utility model second embodiment push rod bottom view.

Specific embodiment

As shown in Figure 1 and Figure 7, a kind of gear-type syringe, is made of injection tube 1 and piston 2, the both ends point of injection tube 1 Not Wei injection port 1-1 and piston mouth 1-2, piston 2 from piston mouth 1-2 insertion injection tube 1 in, piston 2 is by Capsule 2-1 and push rod 2- 2 compositions, push rod 2-2 have four rib 2-2-2, and radial section is cross, and the both ends push rod 2-2 are respectively Capsule end 2-2-1 and hand Pommel 2-2-3, Capsule end 2-2-1 and handle end 2-2-3 are round sheet, and Capsule 2-1 is socketed on the 2-2-1 of Capsule end.

Such as Fig. 2-8 it is characterized in that, in the first embodiment, the position on 1 inner wall of injection tube close to piston mouth 1-2 is also set Having gear a card 1-3, gear card 1-3 is arc-shaped flaky, and for centering angle less than 80 °, one end of gear card 1-3 is additionally provided with baffle 1- The Capsule end 2-2-1 of 3-1, push rod 2-2 are equipped with an arc notch 2-2-1-1 corresponding with gear card 1-3, arc notch 2- 2-1-1 is between any two rib 2-2-2.Since Capsule end 2-2-1 has an arc notch 2- corresponding with gear card 1-3 2-1-1 can utilize elasticity of the Capsule 2-1 at arc notch 2-2-1-1 in assembly, and piston 2 is inserted into injection tube 1 In.

Multiple spacing breach 2-2-2-1 are also evenly distributed on the rib without the side baffle 1-3-1 on gear card 1-3, are limited The size of position notch 2-2-2-1 and the thickness of gear card 1-3 match.In this way, when rotation piston 2 in place, push rod 2-2 On spacing breach 2-2-2-1 can be stuck in just on the gear card 1-3 of 1 inner wall of injection tube, thus fixed piston 2 and injection Cylinder 1 relative position, avoid because shake and caused by leakage and sucking air.And the baffle 1-3-1 on gear card 1-3, both Operator can be made to perceive rotation operation in place, and the rotation terminal of push rod 2-2 can be limited, avoid rotating not in place or mistake It threads off caused by degree.

For second embodiment on the basis of first embodiment, the handle end 2-2-3 on push rod 2-2 has added a label Arc notch 2-2-1-1 on notch 2-2-3-1, code notches 2-2-3-1 and Capsule end 2-2-1 is located at the same section quadrant In.It is convenient that such design provides when being in order to the production, since Capsule 2-1 is mostly transparent materials, so from outer It is not easy to differentiate the position arc notch 2-2-1-1 of Capsule end 2-2-1 in sight, needs hand touch to search out arc in assembly in this way V notch v 2-2-1-1, it is corresponding with the gear position card 1-3, then assembled, such operation not only will increase working hour and can also There is bigger risk to introduce pollution.And in a second embodiment, on handle end 2-2-3, with Capsule end 2-2-1 arc notch 2- The corresponding position 2-1-1 has added a code notches 2-2-3-1, and such operator does not need touch searching can be very Know clearly the position of arc notch 2-2-1-1, assembly manipulation has also been easy very much.

Capsule 2-1 when assembly, is socketed in outside the 2-2-1 of Capsule end by the application method of gear-type syringe first, then will Piston 2 is finally pushed into injection tube 1 by Capsule 2-2-1 position alignment gear card 1-3 corresponding to the position code notches 2-2-3-1, In use, pull piston 2 makes to fill medical fluid in injection tube 1 first, then when needing to stop fluid injection, or injection needs to suspend When, piston 2 is rotated, is caught in gear card 1-3 in spacing breach 2-2-2-1, until turning at baffle 1-3-1,2 position of piston It is i.e. locked, finally, rotating backward piston 2 when needing to continue fluid injection or injection, gear card 1-3 is made to be detached from spacing breach 2-2- The limitation of 2-1 can unlock lock state.

Claims

1. a kind of gear-type syringe is made of injection tube (1) and piston (2), the both ends of the injection tube (1) are respectively to inject Mouth (1-1) and piston mouth (1-2), piston (2) is from piston mouth (1-2) insertion injection tube (1), and the piston (2) is by Capsule (2- 1) it is formed with push rod (2-2), push rod (2-2), there is four ribs (2-2-2), radial section is cross, the push rod both ends (2-2) point Not Wei Capsule end (2-2-1) and handle end (2-2-3), Capsule end (2-2-1) and handle end (2-2-3) are round sheet, glue Cap (2-1) is socketed on Capsule end (2-2-1), which is characterized in that close to piston mouth (1-2) on injection tube (1) inner wall Position is additionally provided with a gear card (1-3), and the gear card (1-3) is arc-shaped flaky, and centering angle is less than 80 °, gear card (1-3) One end be additionally provided with baffle (1-3-1), the Capsule end (2-2-1) of the push rod (2-2) is equipped with one and gear card (1-3) phase The arc notch (2-2-1-1) answered, arc notch (2-2-1-1) is between any two ribs (2-2-2), close to gear card Multiple spacing breach (2-2-2-1), spacing breach (2-2-2- are also evenly distributed on rib without the side baffle (1-3-1) on (1-3) 1) size and the thickness of gear card (1-3) match.

2. gear-type syringe according to claim 1, which is characterized in that the handle end (2- on the push rod (2-2) It 2-3) is equipped with a code notches (2-2-3-1), the arc on the code notches (2-2-3-1) and Capsule end (2-2-1) lacks Mouth (2-2-1-1) is located in the same section quadrant.