CN2796649Y

CN2796649Y - Disposable automatic hemospast

Info

Publication number: CN2796649Y
Application number: CN 200520083511
Authority: CN
Inventors: 蒋晓燕; 李峰; 姜晶; 张丰焕; 林海燕
Original assignee: 蒋晓燕
Priority date: 2005-05-27
Filing date: 2005-05-27
Publication date: 2006-07-19
Anticipated expiration: 2015-05-27

Abstract

The utility model discloses a disposable automatic hemospast which comprises a hollow cylinder and a piston, wherein two arc-shaped plates symmetrically extend from the back end of the hollow cylinder; a piston handle extends from the back end of the piston; an automatic blood sampling device which is composed of a plurality of groups of quantitative plates symmetrically arranged at the inner sides of the two arc-shaped plates, a baffle plate arranged on the piston handle, and a spring arranged between the back ends of the baffle plate and the hollow cylinder is arranged in a hollow cavity which is formed among the piston handle and the two arc-shaped plates; the baffle plate is provided with a centre hole; the piston handle can slide along the centre hole, and can avoid the pressure of the spring to easily inject a blood sample to a test tube. The disposable automatic hemospast of the utility model has the advantage that the utility model automatically samples blood by using spring force, disengages from an automatic blood sampling state when sampled blood achieves scheduled quantity, and avoids the spring force after blood sampling is finished, so that the blood sample is easily injected to the test tube.

Description

Disposable automatic hemospast

Technical field

This utility model relates to the hemospast technical field that is used to take the venous blood specimen in the medical test equipment, particularly a kind of automatic hemospast.

Background technology

The hemospast that is used to take the venous blood specimen as the medical test equipment, use in a large number clinically, use its work process of carrying out vein haemospasia to be: the patient exposes ancon and stretches, the medical worker is bound in point of puncture with tourniquet top appears vein blood vessel with the backflow that stops venous blood, after partly sterilised, get disposable syringe and puncture, after the success, blood is entered in the syringe with hands pumpback syringe piston; But because disposable syringe is for fear of gas leakage, the gap is very little between its piston and the empty tube, so relatively require great effort during blood drawing, also make needle point and pin stalk front end deviate from blood vessel simultaneously easily and cause the blood drawing failure, carry out empty stomach morning at the chemical examination center of hospital when drawing blood, because the patient is many, the labor intensity of medical worker's hand of blood drawing must strengthen.

Summary of the invention

It is a kind of both easy and simple to handle that the purpose of this utility model is to provide, and can finish the disposable automatic hemospast of blood drawing again automatically.

The technical scheme that this utility model is adopted for achieving the above object is:

Disposable automatic hemospast, comprise empty tube and piston, the outside of empty tube indicates scale, piston seals mutually with empty tube inner chamber and can slide along empty tube inner chamber, its special character is that described empty tube rear end symmetry extends two arcs, piston handle is extended in the rear end of piston, and an automatic bloodletting instrument is arranged in the cavity that constitutes between piston handle and two arcs.

Described automatic bloodletting instrument be symmetricly set in many groups of quantitative plates of two arc inboards and be arranged at the plate washer on the piston handle and be arranged at plate washer and empty tube rear end between spring; Quantitative plate interval each other on each arc is corresponding with the scale that the outside of empty tube indicates, and the distance on two arcs between every group of quantitative plate top of symmetrical setting is greater than the diameter of piston; Plate washer with the perpendicular plane of piston handle in ovalize, oval minor axis is less than the distance between every group of quantitative plate top of symmetrical setting on two arcs, long axis of ellipse greater than the distance between every group of quantitative plate top of symmetrical setting on two arcs less than the distance between the quantitative buttress of every group of symmetrical setting on two arcs portion, the internal diameter of spring is greater than the diameter of piston, and the external diameter of spring is less than the distance between every group of quantitative plate top of symmetrical setting on two arcs.

In order more easily the blood preparation of taking to be injected in the test tube, described plate washer is provided with centre bore, and piston handle can slide along this centre bore; Be positioned on the piston handle of plate washer bottom and be arranged with two wing plates, the both wings integrated circuit board is gone in the draw-in groove of plate washer bottom, and the radial distance between the two wing plate tops is less than the diameter of piston; Also be provided with on the plate washer and the corresponding open-work of two wing plates, piston handle is passed from plate washer, so just can avoid the pressure of spring and like a cork blood preparation is injected in the test tube.

Described open-work and draw-in groove are 90 ° of angles, so not only can conveniently make but also better appearance.

Be connected with gusset between the end of described two arcs, its purpose is in order to make disposable automatic hemospast of the present utility model have certain rigid, to be convenient to the duty that keeps stable; Near the thickness of the axial distance between one group of terminal quantitative plate, its objective is that Producer carries out assembling just for convenience on gusset and two arcs greater than plate washer.

Disposable automatic hemospast use of the present utility model is as follows:

After venipuncture success, only need the piston handle half-twist can be entered automatic blood drawing state, at this moment, spring force promotes plate washer and drives piston by piston handle to move backward, with the blood Automatic Extraction in empty tube; Show by the outside scale that indicates of empty tube, when the blood that can take in empty tube reaches a certain predetermined quantity, again with the piston handle half-twist, the two ends of the oval major axis of plate washer are kept off on one group of quantitative plate on two arcs, thereby stopping piston drawing blood automatically, push point of puncture with aseptic cotton carrier then, extract syringe needle and can finish blood sampling, so just can reach and not only avoid syringe needle to deviate from blood vessel but also time saving and energy saving purpose; When needing to squeeze into the blood preparation in the disposable automatic hemospast in the test tube, piston handle is twitched slightly backward, make the draw-in groove on the two wing plates disengaging plate washer on the piston handle, again the piston handle half-twist is made two wing plates enter in the open-work on the plate washer, just can like a cork blood preparation be injected in the test tube.

Therefore, thus disposable automatic hemospast of the present utility model has and can utilize spring force to draw blood automatically, can break away from automatic blood drawing state again and blood sampling can also be avoided spring force after finishing and like a cork blood preparation is injected into advantage in the test tube when the blood of taking reaches predetermined quantity.

Description of drawings

Fig. 1 is a cutaway view of the present utility model.

Fig. 2 is along the cutaway view of A-A line among Fig. 1.

Fig. 3 is along the cutaway view of B-B line among Fig. 1.

Fig. 4 is the front view of plate washer of the present utility model.

Fig. 5 is the vertical view of plate washer of the present utility model.

Fig. 6 is the upward view of plate washer of the present utility model.

Among the figure: 1-piston, the empty tube of 2-, 3-spring, 4-plate washer, 5-wing plate, 6-piston handle, the quantitative plate of 7-, 8-arc, 9-centre bore, 10-open-work, 11-draw-in groove, 12-gusset.

The specific embodiment

Fig. 1 to 6 is depicted as the disposable automatic hemospast of a kind of specific embodiment of the present utility model, it is by the known outside graduated empty tube 2 that indicates, seal mutually also and can constitute with empty tube 2 inner chambers along the piston 1 that empty tube inner chamber slides, its special character is that empty tube 2 rear end symmetries extend two arcs 8, piston handle 6 is extended in the rear end of piston 1, piston handle 6 is provided with plate washer 4, be provided with spring 3 between plate washer 4 and empty tube 2 rear ends, two arcs, 8 inboards are symmetrically arranged with the quantitative plate 7 of many groups, quantitative plate 7 interval each other on each arc 8 is corresponding with the scale that the outside of empty tube 2 indicates, and the distance on two arcs 8 between every group of quantitative plate 7 tops of symmetrical setting is greater than the diameter of piston 1; Plate washer 4 with the perpendicular plane of piston handle 6 in ovalize, oval minor axis is less than the distance between every group of quantitative plate 7 tops of symmetrical setting on two arcs 8, long axis of ellipse greater than the distance between every group of quantitative plate 7 tops of symmetrical setting on two arcs 8 less than the distance between every group of quantitative plate 7 roots of symmetrical setting on two arcs 8, the internal diameter of spring 3 is greater than the diameter of piston 1, and the external diameter of spring 3 is less than the distance between every group of quantitative plate 7 tops of symmetrical setting on two arcs 8; Plate washer 4 is provided with centre bore 9, and piston handle 6 can slide along this centre bore 9; Be positioned at and be arranged with two wing plates, 5, two wing plates 5 on the piston handle 6 of plate washer 4 bottoms and snap in the draw-in groove 11 of plate washer 4 bottoms, the radial distance between two wing plates, 5 tops is less than the diameter of piston 1; Also be provided with on the plate washer 4 and two wing plates, 5 corresponding open-works 10, piston handle 6 is passed from plate washer 4, open-work 10 is 90 ° of angles with draw-in groove 11; Be connected with gusset 12 between the end of two arcs 8, the axial distance on gusset 12 and two arcs 8 between one group of quantitative plate 7 of close end is greater than the thickness of plate washer 4; Spring 3 adopts stainless steel material, and remainder adopts the plastic material identical with disposable syringe, and capacity is 5ml or 10ml.

Disposable automatic hemospast of the present utility model is not limited to the above-mentioned specific embodiment; utilize external force such as spring force to promote the piston motion in the cavity that every rear end of extending arc, piston at empty tube rear end extends piston handle, constitute between piston handle and arc and constitute the structure of automatic bloodletting instrument, all fall within the protection domain of the present utility model.

Claims

1, disposable automatic hemospast, comprise empty tube and piston, the outside of empty tube indicates scale, piston seals mutually with empty tube inner chamber and can slide along empty tube inner chamber, it is characterized in that: described empty tube [2] rear end symmetry is extended two arcs [8], piston handle [6] is extended in the rear end of piston [1], in the cavity that constitutes between piston handle [6] and two arcs [8] an automatic bloodletting instrument is arranged.

2, disposable automatic hemospast according to claim 1 is characterized in that: described automatic bloodletting instrument for be symmetricly set in the inboard many groups of quantitative plates [7] of two arcs [8] and be arranged at the plate washer [4] on the piston handle [6] and be arranged at plate washer [4] with sky [2] rear end between spring [3]; Quantitative plate [7] interval each other on each arc [8] is corresponding with the scale that the outside of empty tube [2] indicates, and the distance between every group of quantitative plate [7] top of the last symmetrical setting of two arcs [8] is greater than the diameter of piston [1]; Plate washer [4] with the perpendicular plane of piston handle [6] in ovalize, oval minor axis is less than the distance between every group of quantitative plate [7] top of the last symmetrical setting of two arcs [8], long axis of ellipse goes up the distance between every group of quantitative plate [7] top of symmetrical setting and goes up distance between every group of quantitative plate [7] root of symmetrical setting less than two arcs [8] greater than two arcs [8], the internal diameter of spring [3] is greater than the diameter of piston [1], and the external diameter of spring [3] is less than the distance between every group of quantitative plate [7] top of the last symmetrical setting of two arcs [8].

3, disposable automatic hemospast according to claim 2, it is characterized in that: described plate washer [4] is provided with centre bore [9], and piston handle [6] can slide along this centre bore [9]; Be positioned on the piston handle [6] of plate washer [4] bottom and be arranged with two wing plates [5], two wing plates [5] snap in the draw-in groove [11] of plate washer [4] bottom, and the radial distance between two wing plates [5] top is less than the diameter of piston [1]; Also be provided with on the plate washer [4] and the corresponding open-works of two wing plates [5] [10], piston handle [6] is passed from plate washer [4].

4, disposable automatic hemospast according to claim 3 is characterized in that: described open-work [10] is 90 ° of angles with draw-in groove [11].

5, according to claim 1 or 2 or 3 or 4 described disposable automatic hemospasts, it is characterized in that: be connected with gusset [12] between the end of described two arcs [8], gusset [12] and two arcs [8] are gone up near the thickness of the axial distance between terminal one group of quantitative plate [7] greater than plate washer [4].