CN202478301U

CN202478301U - Safe indwelling needle

Info

Publication number: CN202478301U
Application number: CN2012200390348U
Authority: CN
Inventors: 赵继龙; 王强
Original assignee: Shandong Shinva Ande Healthcare Apparatus Co Ltd
Current assignee: Shandong Shinva Ande Healthcare Apparatus Co Ltd
Priority date: 2012-02-08
Filing date: 2012-02-08
Publication date: 2012-10-10
Anticipated expiration: 2022-02-08

Abstract

The utility model belongs to medical instruments and particularly relates to a safe indwelling needle. The safe indwelling needle comprises a steel needle, a steel needle base, a flexible catheter and a catheter base, wherein the steel needle is located in the flexible catheter, a casing is disposed outside the steel needle base, a recycle cylinder is fixed at the tail end of the casing, a sliding chute is disposed on the outer wall of the casing, a transversely sliding switch is installed in the sliding chute, a vertical opening is arranged on the casing, a radial movable button is installed in the vertical opening, a switch channel and a through hole are arranged in the button, the switch channel is matched with a switch, the through hole is matched with the steel needle base, the steel needle base penetrates through the through hole, a groove which is matched with the button is disposed on the outer wall of the steel needle base, a protrusion is mounted at the rear end of the steel needle base, and a compression spring is installed in a cavity which is formed by the front end of the protrusion, the steel needle base and the casing. By means of the safe indwelling needle, after a successful puncture, the switch is withdrawn from the through hole of the button, then the button is pressed down, the steel needle base together with the steel needle is retracted into the recycle cylinder under the action of the compression spring, the point of the steel needle can not be exposed, and puncture injury and cross infection are avoided.

Description

A kind of safety indwelling needle

Technical field

This utility model relates to a kind of safety indwelling needle, is used for quiet (moving) arteries and veins transfusion (blood), belongs to medical apparatus and instruments.

Background technology

Safety indwelling needle is used clinical at present widely, and it adopts the form of flexible catheter cover draw point, and flexible catheter and draw point puncture after the human vas success simultaneously; Extract draw point out and flexible catheter is retained in human vas; It can keep somewhere a couple of days at blood vessel, reduces the patient because of the misery that venipuncture repeatedly causes reaches the fear to having an injection, and alleviates patient's impatience; Be convenient to the infusion of the rescue medication of clinical application and critical, critical patient, alleviate nurse's workload.

Common safety indwelling needle is after clinical puncture finishes, and the draw point of extraction is because of can not in time handling, perhaps in depleted process; Can not effectively protect draw point; Make that in this process exposed needle point is stabbed/scratched patient or associated care personnel formation easily, causes cross infection.Therefore after the success of safety indwelling needle puncture vessel, it is clinical pressing for that draw point is reclaimed protection.

The utility model content

According to above deficiency of the prior art, the technical problem that this utility model will solve is: the draw point that provides a kind of and carry the draw point retracting device, can avoid going out of use stings the safety indwelling needle that injures cross infection.

This utility model solves the technical scheme that its technical problem adopted: described a kind of safety indwelling needle, comprise draw point, draw point seat, flexible catheter and catheter block, and draw point, flexible catheter are separately fixed at the front end of draw point seat, catheter block; Draw point is arranged in flexible catheter, it is characterized in that: the draw point seat is provided with shell outward, the terminal fixedly recovery cylinder of shell; Have chute on the outer wall of shell, horizontal slide switch is installed in the chute, have vertical opening on the shell; Radially active button is installed in the vertical opening; Switch passage that cooperates with switch and the through hole that cooperates with the draw point seat are set in the button, and the draw point seat passes from through hole, and the groove that cooperates with button is set on the outer wall of draw point seat; The draw point base rear end is provided with convexity, and the compression spring is installed in the cavity that forms between protruding front end, draw point seat and the shell.

In this utility model, shell has chute and vertical opening, and chute is used to place switch, and switch can slide in chute, through moving of switch, and radial motion that can lock/unlock button; Button has switch passage and through hole, and through hole is enough big, can allow the draw point seat freely to pass through, the groove fit of through hole and draw point seat; The switch passage cooperates with switch, and under original state, switch is arranged in the switch passage, and the radial motion of button is locked; Button can't be pressed, and the through hole of button blocks the draw point seat, and relative motion does not take place for draw point seat and button, thereby stops the draw point seat to eject; After safety indwelling needle punctures successfully, switch is withdrawed from through hole, then button is pressed, button pass through hole is moved down; After the draw point seat was in the through hole fully, under the effect of compression spring thrust, the draw point seat passed through hole, enters into recovery cylinder together with draw point; Operation cycle finishes, and draw point is isolated from the outside, and avoids draw point mistake thorn, plays protection related personnel's effect.

In this utility model, recovery cylinder and the shell fixed form between the two has multiple, preferred following two kinds of schemes:

Scheme one: described recovery cylinder and shell adopt interference fit.Can guarantee that through interference fit recovery cylinder and shell are connected to one.

Scheme two: described recovery cylinder is connected through screw threads for fastening with shell.Through being threaded, can either guarantee that recovery cylinder and shell connect as one, and are convenient to production and assembly again.

The beneficial effect that this utility model had is:

The safety remaining needle is after successfully puncturing; Switch is withdrawed from from the through hole of button; Push button then, the draw point seat will be retracted in the recovery cylinder under the effect of compression spring together with draw point, and the draw point needle point can not exposed; Thereby protection patient, medical personnel and other related personnel's safety avoid thorn to injure cross infection.

Description of drawings

Fig. 1 is the structural representation of this utility model under the original state;

Fig. 2 is the structural representation that draw point reclaims back this utility model;

Fig. 3 is the structural representation of button;

Fig. 4 is the A-A profile of Fig. 3;

Fig. 5 is the structural representation of draw point seat;

Fig. 6 is the position view of original state knob down and draw point seat.

Among the figure: 1, sheath; 2, draw point; 3, flexible catheter; 4, catheter block; 5, shell; 6, draw point seat; 7, button; 8, switch; 9, compression spring; 10, recovery cylinder; 11, switch passage; 12, through hole; 13, groove; 14, convexity.

The specific embodiment

Below in conjunction with accompanying drawing the embodiment of this utility model is done and to further describe:

As shown in Figure 1, a kind of safety indwelling needle comprises draw point 2, draw point seat 6, flexible catheter 3 and catheter block 4; Draw point 2, flexible catheter 3 are separately fixed at the front end of draw point seat 6, catheter block 4, and draw point 2 is arranged in flexible catheter 3, the draw point seat 6 outer shells 5 that are provided with; Shell 5 terminal fixedly recovery cylinders 10 have chute on the outer wall of shell 5, and horizontal slide switch 8 is installed in the chute; Have vertical opening on the shell 5, radially active button 7 is installed in the vertical opening, switch passage 11 that cooperates with switch 8 and the through hole 12 that cooperates with draw point seat 6 are set in the button 7; The draw point seat passes from through hole 12; The groove 13 that cooperates with button 7 is set on the outer wall of draw point seat 6, and draw point seat 6 rear ends are provided with convexity 14, and compression spring 9 is installed in the cavity that forms between protruding 14 front end, draw point seat 6 and the shell 5.

Wherein, shell 5 has chute and vertical opening, and chute is used to place switch 8; Switch 8 can slide in chute, and button 7 has switch passage 11 and through hole 12 (like Fig. 3, shown in 4), and through hole 12 is enough big; Can allow draw point seat 6 freely to pass through, draw point seat 6 has groove 13 and protruding 14 (as shown in Figure 5), and through hole 12 cooperates with the groove 13 of draw point seat; Can block draw point seat 6, make draw point seat 6 and button 7 that relative motion not take place, switch passage 11 cooperates with switch 8; Entering through switch 8/withdraw from, radial motion that can lock/unlock button 7; Recovery cylinder 10 is a hollow structure, and an end seals an end opening, and opening and shell 5 one ends are secure fit or interference fit, produces and guaranteed performance for convenient, preferentially selects for use screw threads for fastening to cooperate; In order to guarantee the safe in utilization and sanitary condition of safety indwelling needle, can be provided with sheath 1 at the safety indwelling needle front end by the structure of conventional security remaining needle.

Under original state, as shown in Figure 1, draw point 2 is fixed on draw point seat 6 front ends; Switch is arranged in switch passage 11, and the radial motion of button 7 is locked, under the effect of switch 8; Button 7 can't be pressed, and at this moment, compression spring 9 is in compressive state; Through hole 12 blocks draw point seat 6, stops draw point seat 6 to eject, and the relative position of original state knob down and draw point seat is as shown in Figure 6; After safety indwelling needle punctures successfully, switch 8 is withdrawed from through hole 12, then button 7 is pressed, button pass through hole 12 is moved down; After draw point seat 6 was in the through hole 12 fully, under the effect of compression spring 9 thrusts, draw point seat 6 passed through hole 12; Enter into recovery cylinder 10 together with draw point 2, as shown in Figure 2, the operation cycle finishes; Draw point is isolated from the outside, and avoids draw point mistake thorn, plays protection related personnel's effect.

Claims

1. a safety indwelling needle comprises draw point, draw point seat, flexible catheter and catheter block, and draw point, flexible catheter are separately fixed at the front end of draw point seat, catheter block; Draw point is arranged in flexible catheter, it is characterized in that: the draw point seat is provided with shell outward, the terminal fixedly recovery cylinder of shell; Have chute on the outer wall of shell, horizontal slide switch is installed in the chute, have vertical opening on the shell; Radially active button is installed in the vertical opening; Switch passage that cooperates with switch and the through hole that cooperates with the draw point seat are set in the button, and the draw point seat passes from through hole, and the groove that cooperates with button is set on the outer wall of draw point seat; The draw point base rear end is provided with convexity, and the compression spring is installed in the cavity that forms between protruding front end, draw point seat and the shell.