CN2139833Y

CN2139833Y - Automatic close type intravenous drip injector

Info

Publication number: CN2139833Y
Application number: CN 92234440
Authority: CN
Inventors: 洪永丰
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-09
Filing date: 1992-10-09
Publication date: 1993-08-11
Anticipated expiration: 2002-10-09

Abstract

The utility model relates to an automatic close type intravenous drip injector, which is characterized in that a liquid storing room at the upper end of a burette is provided with a fixed base. The base is penetrated by a water outlet, and the water outlet can be sheathed with a double-cap floating body, and the upper cap and the lower cap are connected by a circular rod. The upper cap and the lower cap are respectively positioned above the base and below the base. The circular rod is longitudinally penetrated by a groove, and the groove is connected with a ditch on the top face of the lower cap. The double-cap floating body can float upward by the buoyancy provided by the injection liquid and can enable the injection liquid to flow from top to bottom towards the burette by a clearance gap between the upper cap and the base, the groove of the circular rod and the ditch of the lower cap. When the injection liquid above the base is over, and no buoyancy is provided for the upper cap, the upper cap can automatically close the intravenous drip injector.

Description

Automatic close type intravenous drip injector

This utility model relates to a kind of automatic close-type dropping syringe.

The doctor according to the state of an illness, is generally patient and implements the intravenous drip injection when diagnosis, and its purpose is nothing but to borrow medicinal liquids such as injecting nutritional solution, so that patient to be provided physiological needs, helps patient's early recovery.But because fluid infusion, often expend the tediously long time, therefore, patient and nurse personnel are negligent of inspecting injection process easily in injection process, so that whole bottle liquid medicine drips off does not still know, especially in night, easier ignoring, a drop bottle inner liquid medicine is flow to end and dropper in also do not have medicinal liquid, then can cause blood back flow, make blood clotting block entry needle, must change again therefore that dropper is made vascular puncture so that follow-up fluid infusion all has inconvenience for patient and nurse.Therefore, there is the transfusion system of multiple automatic close-type to arise at the historic moment, general automatic close-type dropping syringe all utilizes the relation of buoyancy and injection water level height to reach the output or the termination of syringe, product as shown in Figure 1 promptly utilizes a thin slice body valve A floating in injection to fall the effect of closing automatically of carrying out.But the device of the thin valve A control of this utilization injection; regular meeting due to illness people moves or syringe moves; make thin slice valve A in injection, rock drift about; when near water outlet B is floated at valve A by regular meeting; because of siphon power holds valve A; cause the phenomenon that also can close when still having injection in the syringe, extremely unstable in the use.Also have in addition and utilize various buoyancy aid, floating drum, ball float, kickboard etc. for valve, equally all have shortcomings such as instability, complex structure and balance be not good.

In order to overcome above-mentioned shortcoming of the prior art, this utility model provides a kind of syringe that utilizes two medicated cap buoyancy aids to control injection output automatically and stop.

For achieving the above object, the measure that this utility model is taked is to establish a fixed base below in the liquid-accumulating chamber of transfusion drip tube upper end, an outlet is run through at its center, can be equipped with a two medicated cap buoyancy aid on the base, this buoyancy aid by a round bar connect respectively up and down on one medicated cap and once medicated cap form, the bottom of the top of last medicated cap and following medicated cap all is the round end shape, the bottom of last medicated cap reaches down, and the top of medicated cap is the plane, round bar is between last, between the following medicated cap, its external diameter is smaller than the internal diameter of base outlet, slippage up and down behind the fit on, the round bar height is slightly larger than base outlet height, round bar vertically runs through a groove, and the bottom of groove communicates with following crown face one ditch, and two medicated cap buoyancy aids are assemblied in the base outlet with round bar, medicated cap then laid respectively at the top and the below of base under last medicated cap reached, two medicated cap buoyancy aids can make the gap of injection through last medicated cap bottom surface and base top surface because of buoyancy force when liquid-accumulating chamber leaves injection, the groove of round bar, the ditch of following crown face flow to the base below from top to bottom, flows out to dropper by the base lower end; When injection flows to end, during the no injection in base top, last medicated cap descends immediately because of injection suction, gravity, the outlet of above medicated cap bottom surface sealed base.

The accompanying drawing that this utility model adopts is as follows:

Fig. 1 is the section plan of fluid infusion self closing device commonly used;

Fig. 2 is the three-dimensional view of this utility model embodiment;

Fig. 3 is the section plan of this utility model embodiment;

Fig. 4 is the amplification three-dimensional view of the two medicated cap buoyancy aids of this utility model embodiment.

Below in conjunction with drawings and Examples this utility model is done more detailed explanation.

As Fig. 2 and Fig. 3, this utility model embodiment has a drop bottle 1, liquid-accumulating chamber 2, dropper 3, flow regulator 4 and entry needle 5 to form.The injection that some drop bottle 1 is supplied with is handled plug-flow amount actuator 4 by dropper 3 and is adjusted the control flow through the outlet of the lower end of liquid-accumulating chamber 2, then injects venous patient from entry needle 5.Main feature of the present utility model is to locate to be provided with a fixed base 7 below liquid-accumulating chamber's 2 inwalls of dropper 3 upper ends, this base 7 can be directly molded on liquid-accumulating chamber's 2 inwalls when making, base 7 centers are penetrated with the outlet 71 of a circular hole, lead to unique passage of lower end dropper 3 for liquid-accumulating chamber 2.To be the conical surface preferable with little for base 7 end faces, promptly forms near outlet 71 places at center higherly, and the outer rim place is lower.Be equipped with a pair of medicated cap buoyancy aid 6 on the base 7, this pair medicated cap buoyancy aid 6 is made with foaming method by the latex material, includes medicated cap 61, medicated cap 62 and round bar 63 one-body molded compositions (as shown in Figure 4) down.The volume of wherein going up medicated cap 61 is greater than following medicated cap 63, and its top is the round end shape, and the bottom is that the plane is connected with following medicated cap 62 with round bar 63, and the volume of following medicated cap 62 is less, and its top is that the plane is connected with round bar 63, and the bottom also is the round end shape.Round bar 63 is a circular columns, and between last medicated cap 61 and down between the medicated cap 62, its external diameter is slightly less than the internal diameter of base 7 outlets 71, so that slippage up and down when cooperating.The height of round bar 63 is greater than the height of base 7 outlets 71, so that two medicated cap buoyancy aid 6 can move do oscilaltion with after base 7 cooperates.Vertically be penetrated with a groove 64 on the round bar 63, this groove 64 and last medicated cap 61 bottom surfaces and medicated cap 62 end faces are vertical down, the bottom of groove 64 is connected following medicated cap 62 whole top of these ditch 65 perforations with a ditch 65 on play medicated cap 62 end faces.Two medicated cap buoyancy aids 6 promptly cooperate the outlet 71 of base 7 with round bar 63 parts, press injection water level height and lifting is unsteady.

When having injection in the liquid storage pool 2, two medicated cap buoyancy aids 6 promptly are subjected to the injection buoyancy force, and following medicated cap 62 end faces are held in the bottom surface of base 7, on continuing, move the two medicated cap buoyancy aids 6 of restriction, make it the location, this moment, injection can flow to base 7 belows from top to bottom through gap, the groove 64 of round bar 63, the ditch 65 of last medicated cap 61 bottom surfaces and base 7 end faces, and then the outlet by base 7 lower ends flows out.When injection flows to end, base 7 tops do not have injection, injection is only below base 7, this moment volume, volume, the weight bigger last medicated cap 61 of following medicated cap 62 that weight is all little because of being not enough to jack-up base 7 tops, again because of still leaving injection in the dropper 3, owing to the suction and the siphon principle of liquid, add the weight of medicated cap 61, force medicated cap 61 to fall within on the base 7, the outlet 71 of the bottom surface complete closed base 7 of above medicated cap 61 is finished the effect of closing dropping syringe automatically.Moreover, when this utility model is changed some drop bottle 1, the two medicated cap buoyancy aids 6 that sealed outlet 71 are after injection injects in liquid-accumulating chamber 2, because buoyancy is floated from base 7 immediately, form once again so that go up the gap of medicated cap 61 bottom surfaces, outlet 71 is open, injection can flow out from outlet 71 again, injects dropper 3, to continue to finish the task of continuous transfusion.

Comprehensively above-mentioned, find out that this utility model is real and be a kind of good sealing effect, the automatic close-type dropping syringe of simple in structure and working stability.

Claims

1, a kind of automatic close-type dropping syringe, comprise a drop bottle, liquid-accumulating chamber, dropper, flow regulator and entry needle, establish a fixed base below in the liquid-accumulating chamber that is characterised in that dropper upper end of the present utility model, an outlet is run through at its center, can be equipped with a two medicated cap buoyancy aid on the base, this buoyancy aid system by a round bar connect respectively up and down on one medicated cap and once medicated cap form, the top of last medicated cap reaches down, and the bottom of medicated cap all is the round end shape, the bottom of last medicated cap reaches down, and the top of medicated cap is the plane, round bar is between last, between the following medicated cap, its external diameter is smaller than the internal diameter of base outlet, slippage up and down behind the fit on, the round bar height is slightly larger than base outlet height, round bar vertically runs through a groove, the bottom of groove communicates with following crown face one ditch, two medicated cap buoyancy aids are assemblied in the base outlet with round bar, medicated cap then laid respectively at the top and the below of base under last medicated cap reached, two medicated cap buoyancy aids can be because of buoyancy force when liquid-accumulating chamber leaves injection, make the gap of injection through last medicated cap bottom surface and base top surface, the groove of round bar, the ditch of following crown face flow to the base below from top to bottom, flows out to dropper by the base lower end; When injection flows to end, during the no injection in base top, last medicated cap descends immediately because of injection suction, gravity, the outlet of above medicated cap bottom surface sealed base.