CN110141726A - A safety syringe with repeatedly retractable needle tip - Google Patents

Abstract

The invention discloses a safety syringe with repeatedly retractable needle point, which comprises a needle cylinder, a needle tube, a needle tube seat and a needle tube cover. A piston and a core rod fixed on the piston are arranged in the needle cylinder. One end extends outward to the outside of the syringe, the needle tube seat is arranged in the syringe and faces away from the piston, the needle tube is fixed on the needle tube seat, and the needle tube cover is arranged on the syringe The front end of the needle tube is arranged parallel to the needle head of the needle tube, and it is characterized in that an elastic member is arranged on the end of the needle tube seat facing the piston, and the elastic member is floatingly arranged on the needle tube seat, and the needle tube seat The side part is provided with a switch part for controlling the expansion and contraction of the elastic part.

Description

A safety syringe with repeatedly retractable needle tip

technical field

The invention relates to the field of medical equipment, in particular to a safety syringe with a repeatedly retractable needle tip.

Background technique

Clinically, the nurse uses the injection needle to draw the liquid medicine into the syringe, and often puts it for a few minutes before proceeding to the next step of injection or dispensing. This period of time is only a few minutes. If the protective cap is not covered, the injection needle will be very damaged. It is easy to be polluted, and the exposed injection needle is easy to stab the nurse or others, so the general nurse will cover the protective cap again, which will increase the workload of the nurse.

Contents of the invention

The technical problem to be solved by the present invention is to provide a safety syringe with a repeatedly retractable needle tip in view of the problems of existing injection needles such as being easily contaminated, easily stabbing nurses or others, covering with protective caps, and increasing workload. to solve the above problems.

The technical problem solved by the present invention can adopt following technical scheme to realize:

A safety syringe with a repeatedly retractable needle tip, comprising a syringe, a needle tube, a needle tube seat and a needle tube cover, a piston and a core rod fixed on the piston are arranged in the syringe, and one end of the core rod extends outward To the outside of the syringe, the needle tube seat is arranged in the syringe and faces away from the piston, the needle tube is fixed on the needle tube seat, and the needle tube cover is arranged at the front end of the syringe and The needle head of the needle tube is arranged in parallel, and it is characterized in that an elastic member is arranged at the end of the needle tube seat facing the piston, the elastic member is floatingly arranged on the needle tube seat, and the side of the needle tube seat is provided with a useful The switch part is used to control the expansion and contraction of the elastic part.

In a preferred embodiment of the present invention, a limiting device for limiting the movement of the elastic component is also arranged in the needle sleeve.

In a preferred embodiment of the present invention, the limiting device is a limiting block, and the limiting block is fixed on the inner wall of the needle sleeve.

In a preferred embodiment of the present invention, the elastic component is a stretch hose.

In a preferred embodiment of the present invention, the switch part includes a button and a locking member arranged on the button, one end of the button is connected with the needle tube seat, and the other end passes through the needle tube cover to the outside Extending, the locking piece is matched with the locking piece arranged on the inner wall of the needle tube cover.

Due to the adoption of the above technical solution, the beneficial effect of the present invention is that the syringe of the present invention adopts elastic components, which can reduce the process of repeated use of protective caps by medical workers, avoid the probability of nurses being accidentally stabbed by needle points, and at the same time reduce the nurses' workload. The needle tube can be pushed out or pulled back at any time as needed, which is simple and convenient.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of a safety syringe with a repeatedly retractable needle tip of the present invention in an extended state.

Fig. 2 is a schematic structural view of a retractable safety syringe with a repeatedly retractable needle tip according to the present invention.

Detailed ways

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further elaborated below.

Referring to Fig. 1 to Fig. 2, a safety syringe with a repeatedly retractable needle tip includes a syringe 10, a needle tube 11, a needle tube seat 12 and a needle tube cover 13, and a jacket 10a is set on the syringe 10, and the needle tube 10 is set inside There is a piston 10b and a core rod 10c fixed on the piston 10b. One end of the core rod 10c extends outward to the outside of the syringe 10. The needle tube seat 12 is arranged in the syringe 10 and faces away from the piston 10b. The needle tube 11 is fixed on the needle tube seat 12 Above, the needle tube 11 and the needle tube seat 12 are bonded with medical adhesive, the needle tube cover 13 is arranged at the front end of the syringe 10 , and the needle tube cover 13 is arranged parallel to the needle head 11 a of the needle tube 11 . An elastic member 20 is provided at the end of the needle tube base 12 facing the piston 10a, and the elastic member 20 is preferably a stretching hose. The elastic component 20 is floatingly arranged on the needle tube base 12 , and a switch component 30 for controlling the expansion and contraction of the elastic component 20 is provided on the side of the needle tube base 12 .

The switch part 30 includes a button 31 and a locking piece 32. The locking piece 32 is arranged on the button 31. One end of the button 31 is connected with the needle tube base 12, and the other end of the button 31 extends outward through the needle tube cover 13. The locking piece 32 is connected to the needle tube holder 12. The lock piece 33 arranged on the inner wall of the needle tube cover 13 is matched and connected. There is a spring 34 on the button 31, and the spring 34 is connected with the needle tube base 12. When the button 31 is pressed, the locking member 32 is separated from the locking member 33 by the spring 34 on the button 31 and can move.

A limiting device 40 is also provided in the syringe 10 , and the limiting device 40 is used to limit the movement of the elastic member 20 and to fix the moving distance of the needle tube 11 . The limiting device 40 is preferably a limiting block, and the limiting block 40 is fixed on the inner wall of the needle tube cover 13 .

The working principle of the present invention is as follows:

When in use, the user needs to push the button 31 on the side at the same time, and the needle tube 11 on the needle tube base 12 will protrude out of the needle tube cover 13 through the elastic member 20 to suck the medicinal solution or inject. In addition, the user can let go The button 31 can limit the moving distance of the needle tube 11 through the limit device 40. When it needs to be temporarily placed or used, the user simultaneously presses the side button 31 and pulls back the needle tube 11 on the needle tube holder 12 to retract into the needle sleeve 13 , Complete the injection, facilitate the recycling of medical waste, and protect the environment.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. the safety injector that a kind of needle point can stretch repeatedly, including syringe, needle tubing, needle tubing seat and needle tubing set, in the syringe The core bar for being provided with piston and being fixed on the piston, one end of the core bar is extended to outward outside the syringe, described Needle tubing seat is arranged in the syringe and backwards to the piston, and the needle tubing is fixed on the needle tubing seat, and the needle tubing is arranged It sets the front end in the syringe and is arranged in parallel with the syringe needle of the needle tubing, which is characterized in that in the needle tubing seat surface to described One end of piston is provided with an elastomeric element, and the elastomeric element, which floats, to be arranged on the needle tubing seat, the side of the needle tubing seat Portion is provided with for controlling the flexible switch block of elastomeric element.

2. a kind of safety injector that needle point can stretch repeatedly as described in claim 1, which is characterized in that in the needle tubing set It is additionally provided with to limit the mobile limiting device of elastomeric element.

3. a kind of safety injector that needle point can stretch repeatedly as claimed in claim 2, which is characterized in that the limiting device For limited block, the limited block is fixed on the inner wall of the needle tubing set.

4. a kind of safety injector that needle point can stretch repeatedly as described in claim 1, which is characterized in that the elastomeric element To stretch hose.

5. a kind of safety injector that needle point can stretch repeatedly as described in claim 1, which is characterized in that the switch block Including button and the lock piece being arranged on the button, one end of the button is connect with the needle tubing seat, and the other end passes through The needle tubing set extends outwardly, and the lock piece is cooperatively connected with the lock piece being arranged on the needle tubing set inner wall.