CN101293122A - Piston push rod positioning pin of guide thread imbedding device - Google Patents

Abstract

The invention relates to a locating pin of a piston push rod of a guide wire introducer, which is composed of the piston push rod, the locating pin, a piston bush and a connecting sleeve of a pinhead; the locating pin (2) is arranged at the piston push rod (1); and a track (9) is arranged at the piston push rod (1); the locating pin (2) is arranged at the track (9); a track slot is arranged in the locating pin (2), which is identical with the track (9) completely; the locating pin (2) slips at the track (9); two parallel and symmetrical screens (8) are arranged at both sides of the track (9) at the piston push rod (1); the two screens are thrust aside so as to limit the piston push rod (1) to enter into a cavity of the piston when the locating pin (2) is moving forwards; when the locating pin (2) is moving backward, the action of the screens (2) at the piston push rod (1) is disappeared, so as to allow the piston push rod (1) to enter into the cavity of the piston sleeve (3); the role of the locating pin of the piston push rod is to keep a negative pressure generated by the guide wire introducer for an artery and a vein in a deep part by a pre-negative pressure, so as to facilitate a doctor to place a catheter in the artery and the vein in the deep part easily; the locating pin has the advantages of rational design, simple structure and effective use.

Description

Piston push rod positioning pin of guide thread imbedding device

Technical field:

The invention belongs to medical apparatus, be specifically related to a kind of piston push rod positioning pin of guide thread imbedding device device.

Background technology:

The push rod pilot pin is a structure of pre-negative pressure deep artery and venous silk-guiding introducing device, if be provided with this pilot pin device, the negative pressure that then pre-negative pressure deep artery and venous silk-guiding introducing device is produced, because of entering in the plunger shaft automatically, push rod disappears, pre-negative pressure deep artery and venous silk-guiding introducing device be can not play and needle tip position and easy to operate performance shown automatically, in operation, increase difficulty for like this medical worker, bring unnecessary trouble, bring unnecessary misery to patient.

Summary of the invention:

The objective of the invention is provides a kind of piston push rod positioning pin of guide thread imbedding device according to above-mentioned weak point, this push rod pilot pin is a structure on the pre-negative pressure deep artery and venous silk-guiding introducing device, its effect is to keep pre-negative pressure deep artery and venous silk-guiding introducing device to produce negative pressure, make things convenient for the very light plumber that puts who carries out the deep artery arteries and veins stably of medical worker to do, if this pilot pin not, the negative pressure that then pre-negative pressure deep artery and venous silk-guiding introducing device is produced, disappear because of push rod enters plunger shaft automatically, can not play pre-negative pressure deep artery and venous silk-guiding introducing device and show thorn needle point position and easy to operate beneficial effect automatically.

Piston push rod positioning pin of guide thread imbedding device of the present invention is to realize like this.This pilot pin is installed on the piston push rod, and its piston push rod is provided with track, and pilot pin is installed in orbit, is provided with rail groove in pilot pin, fits like a glove with track, and pilot pin slides in orbit.Be provided with parallel symmetrical two screens in addition in the both sides that piston push rod gets on the right track, when pilot pin during to front slide, then wash two screens open, certainly be advanced in the plunger shaft with the limited piston push rod, when pilot pin moves backward, then the screens effect on the piston push rod disappears, and enters in the plunger shaft to allow push rod.

Description of drawings:

Fig. 1 is an overall structure sketch map of the present invention.

Fig. 2 is a piston push rod structural representation of the present invention.

Fig. 3 is a piston push rod structure cutaway view of the present invention.

Figure grade:

1 piston push rod, 2 pilot pins, 3 piston bush, 4 syringe needle adapter sleeves, 5 syringe needles, 6 piston push rod sealing rings, 7 piston push rod silk guide passages, 8 screens, 9 tracks, 10 seal wire intakes, 11 seal wires are introduced sealing gasket.

The specific embodiment:

Piston push rod positioning pin of guide thread imbedding device of the present invention, it includes piston push rod (1), pilot pin (2), piston bush (3), syringe needle adapter sleeve (4), syringe needle (5), this pilot pin (2) is installed on the piston push rod (1), and piston push rod (1) is provided with the track (9) of certain distance, pilot pin (2), be installed on the track (9), in pilot pin (2), be provided with rail groove, fit like a glove with track (9), pilot pin (2) is placed in track (9) and goes up slip, in addition be provided with parallel symmetrical two screens (8) in the get on the right track both sides of (9) of piston push rod (1), when pilot pin (2) during to front slide, then wash two screens open, certainly be advanced in the plunger shaft with limited piston push rod (1), when pilot pin (2) when moving backward, then the effect of the screens (8) on the piston push rod (1) disappears, and allows piston push rod (1) to enter piston bush (3) intracavity.

Claims (2)

1, a kind of piston push rod positioning pin of guide thread imbedding device, it includes piston push rod (1), pilot pin (2), piston bush (3), syringe needle adapter sleeve (4), syringe needle (5), it is characterized in that this pilot pin (2) is installed on the piston push rod (1), and piston push rod (1) is provided with track (9), pilot pin (2) is installed on the track (9), be provided with rail groove in pilot pin (2), fit like a glove with track (9), pilot pin (2) is placed in track (9) and goes up slip.

2, piston push rod positioning pin of guide thread imbedding device according to claim 1, it is characterized in that being provided with parallel symmetrical two screens (8) in the get on the right track both sides of (9) of piston push rod (1), pilot pin (2) is when front slide, then wash two screens open, limited piston push rod (1) is advanced in the plunger shaft certainly.

Images