CN211583180U

CN211583180U - Novel medical needle

Info

Publication number: CN211583180U
Application number: CN201921056890.2U
Authority: CN
Inventors: 魏建军; 孙鹏; 孙波
Original assignee: Shandong Yuanke Biotechnology Co ltd
Current assignee: Shandong Yuanke Biotechnology Co ltd
Priority date: 2019-07-08
Filing date: 2019-07-08
Publication date: 2020-09-29
Anticipated expiration: 2029-07-08

Abstract

A novel medical needle comprises an inner tube, a needle point is fixedly connected with the inner tube, and a liquid channel II is arranged in the needle point; the outer tube is sleeved on the inner tube and comprises a sleeve, a limiting block II is arranged on the inner tube, the sleeve is connected with a baffle I, the baffle I is arranged in front of the limiting block II, an elastic part is arranged between the limiting block II and the baffle I, a positioning switch is connected between the inner tube and the outer tube, and when the positioning switch positions the inner tube and the outer tube, the front end of the needle point is positioned outside the outer tube; when the positioning switch does not position the inner tube and the outer tube, the front end of the needle point is positioned in the outer tube under the action of the elastic component. Medical personnel press the outer tube, through control positioning switch for outer tube and inner tube break away from the location, under elastomeric element's effect, make the needle point take out and enter the outer tube from patient's blood vessel automatically, avoid the needle point to expose and stab medical personnel or other people.

Description

Novel medical needle

Technical Field

The utility model relates to the technical field of medical needles, in particular to a novel medical needle head which can be used in blood sampling, transfusion and other operations.

Background

With the development of economy, people pay more and more attention to their health, and due to the progress of medical technology, people can check or treat human health by means of a plurality of instruments, blood sampling is one of common detection items, and infusion is a common clinical means.

Many diseases are known to be infected by blood, wherein a needle poking into a needle from which blood has been drawn or a needle completing an infusion is one of the common routes of infection. Therefore, the medical staff must take care of the already used blood collection needle and the infusion needle to avoid pricking themselves or others.

The blood sampling needle and the transfusion needle commonly used at present comprise a needle head provided with a liquid channel, one end of the needle head is sleeved with a needle head sleeve, the other end of the needle head is connected with a needle cylinder or a hose, when the blood sampling needle and the transfusion needle are used, the exposed needle head is penetrated into a blood vessel of a patient, after the use is finished, a medical worker pulls out the needle head from the blood vessel of the patient, then the needle head sleeve is sleeved at one end of the needle head pulled out from the blood vessel of the patient, the recovery and the centralized treatment are carried out, however, after the needle head is pulled out and the needle head sleeve is sleeved, the medical worker can accidentally stab oneself or other people to cause injury, in addition, when the medical worker uses the blood sampling needle and the transfusion needle, the needle head sleeve is easily lost after the needle head sleeve is pulled out, the used needle head is exposed outside, and the danger is. This is a difference of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that it is not enough to prior art exist exactly, and provide a novel medical syringe needle, medical personnel presses the outer tube, through control positioning switch for the outer tube breaks away from the location with the inner tube, under elastomeric element's effect, makes the needle point get into the inside of outer tube automatically, avoids the needle point to expose stabbing medical personnel or other people.

The scheme is realized by the following technical measures: a novel medical needle comprises an inner tube, wherein a needle point is fixedly connected with the inner tube, and a liquid channel II is arranged in the needle point; the needle point positioning device comprises an inner tube, a limiting block I, a limiting block II, a baffle I, an elastic part, a positioning switch and a needle point, wherein the inner tube is sleeved with the outer tube, the outer tube comprises a sleeve, the inner tube is provided with the limiting block II, the sleeve is connected with the baffle I, the baffle I is arranged in front of the limiting block II, the elastic part is arranged between the limiting block II and the baffle I, the positioning switch is connected between the inner tube and the outer tube, and when the positioning switch positions the inner tube and the outer tube; when the positioning switch does not position the inner tube and the outer tube, the front end of the needle point is positioned in the outer tube under the action of the elastic component. By adopting the technical scheme, when the positioning switch positions the inner tube and the outer tube, the inner tube and the outer tube do not move relatively, medical staff pricks the needle point into the blood vessel of a patient, after the blood sampling or transfusion operation is finished, the medical staff firstly draws the needle point out of the blood vessel of the patient and then presses the outer tube, the inner tube and the outer tube are separated from the positioning by controlling the positioning switch, and the needle point enters the inner part of the outer tube under the action of the elastic component; or the medical staff presses the outer tube, the inner tube and the outer tube are separated from the positioning by controlling the positioning switch, and the needle point is automatically drawn out from the blood vessel of the patient and enters the inner part of the outer tube under the action of the elastic component. The novel medical needle has simple structure and ingenious design, and effectively avoids the blood drawing needle point or the transfusion needle point from exposing and stabbing medical care personnel or other people.

Preferably, the liquid passage of the needle can be realized in the following two ways:

the needle point penetrates through the inner tube.

And (II) a liquid channel I communicated with the liquid channel II is arranged in the inner tube.

Preferably, the resilient member is always in compression. By adopting the technical scheme, when the positioning switch positions the inner tube and the outer tube, the elastic component is in a compressed state, so that medical personnel can press the outer tube after the inner tube and the outer tube are separated from the positioning, and the restoring force of the elastic component can push the inner tube backwards; after the needle point got into the inside of outer tube, elastomeric element still is in compression state, can guarantee the stable inside that is located the outer tube of needle point, even if the outer tube is vertical to be placed (the front end of outer tube is downwards promptly), elastomeric element's elasticity can not be overcome to the needle point, consequently, no matter how place this novel medical syringe needle, under the effect of not having the external force, the needle point all is located the inside of outer tube, the effectual security that has improved.

Preferably, the elastic component is a spring I or an elastic ring, and the spring I or the elastic ring is sleeved on the inner pipe. By adopting the technical scheme, the spring I and the elastic ring are low in price and large in elastic deformation, and the spring I and the elastic ring are sleeved on the inner pipe, so that the stability is effectively guaranteed.

Preferably, the elastic component has the following two arrangement modes:

the baffle I is connected with the front portion of the sleeve, and when the positioning switch positions the inner tube and the outer tube, the elastic component is arranged on the front portion in the outer tube.

Preferably, the limiting block II is in sliding fit with the sleeve, the rear end of the sleeve is connected with a limiting structure, and the limiting structure is a limiting protrusion arranged on the inner wall of the sleeve or a limiting plate fixedly connected with the rear end of the sleeve. By adopting the technical scheme, the limiting structure is arranged, the inner tube can be prevented from sliding out of the rear end of the outer tube under the action of the elastic component, and after the needle point enters the outer tube, the rear end of the limiting block II is propped against the front end of the limiting structure.

Preferably, limit structure's front end is provided with barb structure, barb structure includes following two kinds of forms:

1. the barb structure comprises a deformable barb; under normal conditions, the barb is located the sleeve, receives II extrusion backs of stopper, elastic deformation can take place for the barb, II backward operation of stopper are after through the barb, the barb can reset to the sleeve in, prevents that stopper II from removing forward.

2. The barb structure includes the barb, the one end and the sleeve rotatable coupling of barb, be connected with spring II between barb and the sleeve, be provided with the recess or the through-hole that hold the barb structure on the sleeve. Adopt this technical scheme, under normal conditions, the one end of barb stretches into in the sleeve under the effect of spring II, when inner tube and outer tube need not fix a position, under the effect of spring I, the inner tube removes backward, and stopper II promotes barb compression spring II until pressing the barb to telescopic recess or through-hole in, after stopper II passes through the barb structure, the one end of barb resets to the sleeve under the effect of spring II in, even if promote the inner tube forward, stopper II can not move forward through the barb structure yet.

Preferably, the distance between the limiting structure and the barb structure is larger than or equal to the thickness of the limiting block II. By adopting the technical scheme, when the inner tube and the outer tube are not limited, the limiting block II can be limited between the limiting structure and the barb structure, and then the needle point is limited in the outer tube.

And (II) the baffle I is connected with the middle part of the sleeve, and when the positioning switch positions the inner pipe and the outer pipe, the elastic part is completely arranged at the rear part in the outer pipe or one part of the elastic part is arranged at the rear part in the outer pipe, and the other part of the elastic part is arranged outside the outer pipe.

Preferably, the inner pipe is provided with a limiting block III, the limiting block III is arranged at the front end of the baffle I, and the limiting block II and/or the limiting block III are/is in sliding fit with the sleeve. By adopting the technical scheme, after the needle point enters the outer tube, the rear end of the limiting block III is propped at the front end of the baffle I, so that the inner tube is prevented from sliding out of the rear end of the outer tube.

Preferably, the front end of baffle I is provided with the barb structure, the barb mechanism includes following two kinds of forms:

1. the barb structure comprises a deformable barb; under normal conditions, the barb is located the sleeve, receives III extrusion backs of stopper, elastic deformation can take place for the barb, stopper III moves backward through the barb after, the barb can reset to the sleeve in, prevents that stopper III from removing forward.

2. The barb structure includes the barb, the one end and the sleeve rotatable coupling of barb, be connected with spring II between barb and the sleeve, be provided with the recess or the through-hole that hold the barb structure on the sleeve. Adopt this technical scheme, under normal conditions, the one end of barb stretches into in the sleeve under the effect of spring II, when inner tube and outer tube need not fix a position, under the effect of spring I, the inner tube removes backward, stopper III promotes barb and compression spring II until pressing the barb to telescopic recess or through-hole in, after stopper III passes through the barb structure, the one end of barb resets to the sleeve under the effect of spring II in, even if promote the inner tube forward, stopper III also can not move forward through the barb structure.

Preferably, the distance between the baffle I and the barb structure is larger than or equal to the thickness of the limiting block III. Adopt this technical scheme, when inner tube and outer tube do not carry on spacingly, stopper III can be restricted between baffle I and barb structure, and then limits the needle point in the outer tube.

Preferably, the rear end of the inner pipe is provided with a limiting block I.

Preferably, the rear end of the inner pipe is connected with a connecting piece. By adopting the technical scheme, the connecting piece is a connecting pipe fixedly connected with the rear end of the inner pipe, and the connecting piece is used for connecting the novel medical needle head with a blood sampling hose of a blood collector or an infusion hose of an infusion apparatus, so that the needle head can be conveniently punctured to any part of a body for blood sampling or infusion operation.

Preferably, the lower end surface of the outer tube is a plane. By adopting the technical scheme, the lower end surface of the outer tube is arranged to be a plane, so that medical personnel can fix the needle conveniently.

Preferably, a handle is fixedly arranged at one end of the sleeve. By adopting the technical scheme, the handle is arranged to facilitate the operation of medical personnel, and the needle point is punctured into the blood vessel of a patient.

Preferably, when the medical needle is not used, the needle cap is sleeved on the needle point. By adopting the technical scheme, the needle cap is used for protecting the needle tip and avoiding the pollution of the needle tip.

Preferably, the positioning switch comprises a positioning pin, a positioning hole II matched with the positioning pin is formed in the sleeve, and a positioning hole I matched with the positioning pin is formed in the inner tube.

Preferably, the positioning hole I is arranged on the limiting block II or the limiting block III.

The structural form of the positioning switch comprises the following two types:

when the inner pipe and the outer pipe are positioned by the positioning pin, one end of the positioning pin is arranged in the positioning hole I, the middle part of the positioning pin is arranged in the positioning hole II, the other end of the positioning pin is arranged outside the outer pipe, and when the inner pipe and the outer pipe do not need to be positioned, the positioning pin is pulled out from the positioning hole I and the positioning hole II.

And (II) when the positioning pin positions the inner pipe and the outer pipe, one end of the positioning pin is positioned in the positioning hole II, the other end of the positioning pin is positioned in the positioning hole I, and when the inner pipe and the outer pipe do not need to be positioned, the positioning pins are all positioned in the positioning hole I. Adopt this technical scheme, when inner tube and outer tube need not fix a position, medical personnel's accessible is worn the plug pin on the finger and is passed through II inside promotion locating pins of locating hole and push away the locating pin to locating hole I completely in.

A novel medical needle comprises an inner tube, wherein a needle point is fixedly connected with the inner tube, and a liquid channel II is arranged in the needle point; the cover is equipped with the outer tube on the inner tube, the rear portion of inner tube is provided with stopper I, be provided with elastomeric element between the rear end of outer tube and the stopper I, elastomeric element sets up the outside at the outer tube, be connected with positioning switch between inner tube and the outer tube, when positioning switch fixes a position inner tube and outer tube, the front end of needle point is located the outside of outer tube, when positioning switch does not fix a position inner tube and outer tube, under elastomeric element's effect, the front end of needle point is located the inside of outer tube. By adopting the technical scheme, when the positioning switch positions the inner tube and the outer tube, the inner tube and the outer tube do not move relatively, medical staff pricks the needle point into the blood vessel of a patient, after the blood sampling or transfusion operation is finished, the medical staff firstly draws the needle point out of the blood vessel of the patient and then presses the outer tube, the inner tube and the outer tube are separated from the positioning by controlling the positioning switch, and the needle point enters the inner part of the outer tube under the action of the elastic component; or the medical staff presses the outer tube, the inner tube and the outer tube are separated from the positioning by controlling the positioning switch, and the needle point is automatically drawn out from the blood vessel of the patient and enters the inner part of the outer tube under the action of the elastic component. The novel medical needle has simple structure and ingenious design, and effectively avoids the blood drawing needle point or the transfusion needle point from exposing and stabbing medical care personnel or other people.

the needle point penetrates through the inner tube.

Preferably, the positioning switch comprises a positioning pin, a positioning hole II matched with the positioning pin is formed in the outer tube, and a positioning hole III matched with the positioning pin is formed in the inner tube.

when the positioning pin positions the inner pipe and the outer pipe, one end of the positioning pin is arranged in the positioning hole III, the middle of the positioning pin is arranged in the positioning hole II, the other end of the positioning pin is arranged outside the outer pipe, and when the inner pipe and the outer pipe do not need to be positioned, the positioning pin is pulled out of the positioning hole III and the positioning hole II.

And (II) when the positioning pin positions the inner pipe and the outer pipe, one end of the positioning pin is positioned in the positioning hole II, the other end of the positioning pin is positioned in the positioning hole III, and when the inner pipe and the outer pipe do not need to be positioned, the positioning pins are all positioned in the positioning hole III. By adopting the technical scheme, when the inner tube and the outer tube do not need to be positioned, the medical staff can push the positioning pin inwards through the positioning hole II to completely push the positioning pin into the positioning hole III by the insertion nail worn on the finger.

Preferably, the inner pipe is provided with a limiting block III, and the limiting block III can be in sliding fit with the sleeve. By adopting the technical scheme, under the action of the elastic component, the inner tube slides in the outer tube, and the limiting block III can play a role in guiding the movement of the inner tube, so that the stability of the inner tube during movement is improved.

Preferably, the rear end of the sleeve is provided with a limiting structure, the limiting structure is a limiting bulge arranged on the inner wall of the sleeve, or the limiting structure is a baffle II connected with the rear end of the sleeve. Adopt this technical scheme, be provided with limit structure and avoid the inner tube to follow the interior roll-off of outer tube.

Preferably, the elastic part is arranged between the baffle II and the limiting block I. By adopting the technical scheme, the baffle II is arranged to facilitate the positioning and installation of the elastic component.

Preferably, the distance between the limiting structure and the barb structure is larger than or equal to the thickness of the limiting block III. By adopting the technical scheme, when the inner tube and the outer tube are not limited, the limiting block III can be limited between the limiting structure and the barb structure, and then the needle point is limited in the outer tube.

Preferably, the limiting block I is connected with a connecting piece. By adopting the technical scheme, the connecting piece is a connecting pipe fixedly connected with the rear end of the inner pipe, and the connecting piece is used for connecting the novel medical needle head with a blood sampling hose of a blood collector or an infusion hose of an infusion apparatus.

The novel medical needle can be used on a blood collector and an infusion set.

Therefore, compared with the prior art, the utility model has the substantive characteristics and the progress, and the beneficial effects of the implementation are also obvious.

Drawings

FIG. 1 is a schematic perspective view of the needle tip exposed from the outer tube in example 1;

FIG. 2 is a schematic view showing the structure of example 1 in which the needle tip is exposed from the outer tube;

FIG. 3 is a schematic sectional view A-A of FIG. 2;

FIG. 4 is a schematic perspective view of the outer tube according to example 1;

FIG. 5 is a schematic perspective view of the inner tube according to example 1;

FIG. 6 is a perspective view of the needle tip retracted into the outer tube according to example 1;

FIG. 7 is a first schematic view of the needle tip retracted into the outer tube according to embodiment 1;

FIG. 8 is a schematic cross-sectional view of B-B of FIG. 7;

FIG. 9 is a second schematic view of the structure of the needle tip retracted into the outer tube according to example 1;

FIG. 10 is a schematic cross-sectional view of C-C of FIG. 9;

FIG. 11 is a schematic view showing the structure of example 2 in which the needle tip is exposed from the outer tube;

FIG. 12 is a schematic cross-sectional view of D-D of FIG. 11;

FIG. 13 is a schematic perspective view of an outer tube according to example 2;

FIG. 14 is a schematic perspective view of the inner tube according to example 2;

FIG. 15 is a schematic view showing the structure of example 2 in which the needle tip is retracted into the outer tube;

FIG. 16 is a schematic cross-sectional view E-E of FIG. 15;

FIG. 17 is a schematic view showing the structure of example 3 in which the needle tip is exposed from the outer tube;

FIG. 18 is a schematic view showing the structure of the needle tip retracted into the outer tube according to example 3;

FIG. 19 is a schematic view showing the structure of example 4 in which the needle tip is exposed from the outer tube;

FIG. 20 is an enlarged view of part A of FIG. 19;

FIG. 21 is a schematic view showing the structure of the needle tip retracted into the outer tube according to example 4;

FIG. 22 is an enlarged view of the portion B of FIG. 21;

FIG. 23 is a schematic view showing the structure of example 5 in which the needle tip is exposed from the outer tube;

FIG. 24 is an enlarged view of the portion C of FIG. 23;

FIG. 25 is a schematic view showing the structure of the needle tip retracted into the outer tube according to example 5;

FIG. 26 is an enlarged view of the portion D of FIG. 25;

FIG. 27 is a schematic view showing the structure of example 6 in which the needle tip is exposed from the outer tube;

FIG. 28 is an enlarged view of section E of FIG. 27;

FIG. 29 is a schematic view showing the structure of the needle tip retracted into the outer tube according to example 6;

FIG. 30 is an enlarged view of the portion F of FIG. 29;

FIG. 31 is a schematic structural view of example 7;

FIG. 32 is a schematic structural view of example 8;

FIG. 33 is a schematic structural view of example 9.

In the figure: 1-inner tube, 1.1-stopper I, 1.2-stopper II, 1.2.1-positioning hole I, 1.3-stopper III, 1.4-positioning hole III, 2-needle point, 3-liquid channel I, 4-outer tube, 4.1-sleeve, 4.1.1-handle, 4.1.2-positioning hole II, 4.1.3-limiting projection, 5-connecting piece, 6-positioning pin, 7-baffle I, 8-spring I, 9-liquid channel II, 10-baffle II, 11-barb and 12-spring II.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the following explains the present solution by way of specific embodiments and with reference to the accompanying drawings.

Example 1

As shown in fig. 1-10, a novel medical needle comprises an inner tube 1, wherein a needle point 2 is fixedly connected to the front end of the inner tube 1, a liquid channel i 3 is arranged in the inner tube 1, and a liquid channel ii 9 communicated with the liquid channel i 3 is arranged in the needle point 1; the cover is equipped with outer tube 4 on the inner tube 1, outer tube 4 includes sleeve 4.1, the middle part of inner tube 1 is provided with stopper II 1.2, stopper II 1.2 and 1 fixed connection of inner tube perhaps stopper II 1.2 and 1 integrated into one piece of inner tube, the front end of sleeve 4.1 is provided with baffle I7, baffle I7 and sleeve 4.1 fixed connection, be provided with elastomeric element between stopper II 1.2 and the baffle I7, elastomeric element sets up in outer tube 4, be connected with positioning switch between inner tube 1 and the outer tube 4, when positioning switch fixes a position inner tube 1 and outer tube 4, the front end of needle point 2 is located the outside of outer tube 4, when positioning switch does not fix a position inner tube 1 and outer tube 4, under elastomeric element's effect, the front end of needle point 2 is located the inside of outer tube 4. When the positioning switch positions the inner tube 1 and the outer tube 4, the inner tube 1 and the outer tube 4 do not move relatively, medical staff penetrates the needle point 2 into a blood vessel of a patient, after blood sampling or transfusion operation is completed, the medical staff firstly draws the needle point 2 out of the blood vessel of the patient and then presses the outer tube 4, the inner tube 1 and the outer tube 4 are separated from positioning by controlling the positioning switch, and the needle point 2 enters the inner part of the outer tube 4 under the action of the elastic component; or the medical staff presses the outer tube 4, the inner tube 1 is separated from the outer tube 4 by controlling the positioning switch, and the needle point 2 is automatically drawn out from the blood vessel of the patient and enters the inner part of the outer tube 4 under the action of the elastic component.

The elastic component is always in a compressed state. When the positioning switch positions the inner tube 1 and the outer tube 4, the elastic component is in a compressed state, so that after the inner tube 1 and the outer tube 4 are separated from the positioning state, medical personnel can press the outer tube 4, and the restoring force of the elastic component can push the inner tube 1 backwards; after needle point 2 got into the inside of outer tube 4, elastomeric element still is in compression state, can guarantee the stable inside that is located outer tube 4 of needle point 2, even if outer tube 4 is vertical to be placed (the front end of outer tube 4 is downward promptly), elastomeric element's elasticity can not be overcome to needle point 2, consequently, no matter how place this novel medical syringe needle, under the effect of not having the external force, needle point 2 all is located the inside of outer tube 4, the effectual security that has improved.

The elastic part is a spring I8 or an elastic ring, and the spring I8 or the elastic ring is sleeved on the inner tube 1. The spring I8 and the elastic ring are low in price and large in elastic deformation, and the spring I8 and the elastic ring are sleeved on the inner tube 1, so that the stability is effectively guaranteed.

The positioning switch comprises a positioning pin 6, a positioning hole II 4.1.2 matched with the positioning pin 6 is arranged on the outer tube 4, and a positioning hole I1.2.1 matched with the positioning pin 6 is arranged on the inner tube 1. When locating pin 6 fixes a position inner tube 1 and outer tube 4, the one end setting of locating pin 6 is in locating hole I1.2.1, the middle part setting of locating pin 6 is in locating hole II 4.1.2, the other end setting of locating pin 6 is in the outside of outer tube 4, and when inner tube 1 and outer tube 4 need not fix a position, medical personnel can extract locating pin 6 from locating hole I1.2.1 and locating hole II 4.1.2.

In this technical scheme, locating hole I1.2.1 sets up on stopper II 1.2, and when locating pin 6 was fixed a position inner tube 1 and

outer tube

4, 6 one end of locating pin is located locating hole II 4.1.2, the other end of locating pin 6 is located locating hole I1.2.1, and locating pin 6 does not expose, and when inner tube 1 and outer tube 4 need not fix a position, locating pin 6 is whole to be located locating hole I1.2.1. When the inner tube 1 and the outer tube 4 do not need to be positioned, the medical staff can push the positioning pin 6 inwards through the positioning hole II 4.1.2 by the inserting nail worn on the finger to completely push the positioning pin 6 into the positioning hole I1.2.1.

Stopper II 1.2 and sleeve 4.1 sliding fit, 4 rear ends of outer tube are provided with limit structure, limit structure is the limiting plate that sets up at the spacing arch 4.1.3 of sleeve 4.1 inner wall or with sleeve 4.1 rear end fixed connection, spacing arch 4.1.3 and sleeve 4.1 inner wall fixed connection. Be provided with limit structure and can avoid inner tube 1 from the rear end roll-off of outer tube 4 under elastomeric element's effect, after needle point 2 got into in the outer tube 4, the rear end top of stopper II 1.2 is at limit structure's front end.

The rear end of inner tube 1 is provided with stopper I1.1, stopper I1.1 and 1 fixed connection of inner tube, perhaps stopper I1.1 and 1 integrated into one piece of inner tube.

The rear end of the inner pipe 1 is fixedly connected with a connecting piece 5. The connecting piece 5 is a connecting pipe fixedly connected with the rear end of the inner pipe 1, and the connecting piece 5 is used for connecting the novel medical needle head with a blood sampling hose of a blood collector or an infusion hose of an infusion apparatus.

The lower end face of the outer tube 4 is a plane, so that medical staff can fix the needle conveniently.

The right end of the sleeve 4.1 is fixedly provided with a handle 4.1.1, the handle 4.1.1 is arranged to facilitate the operation of medical staff, and the needle point 2 is inserted into the blood vessel of a patient.

When the medical needle is not used, a needle cap (not shown in the figure) is sleeved on the needle point 2. The needle cap serves to protect the needle tip 2 and to avoid contamination of the needle tip 2.

Example 2

As shown in fig. 11-16, a novel medical needle comprises an inner tube 1, a needle point 2 is fixedly connected to the front end of the inner tube 1, a liquid channel i 3 is arranged in the inner tube 1, and a liquid channel ii 9 communicated with the liquid channel i 3 is arranged in the needle point 2; the outer tube 4 is sleeved on the inner tube 1, the outer tube 4 comprises a sleeve 4.1, a limiting block I1.1 is arranged at the rear part of the inner tube 1, the limiting block I1.1 is fixedly connected with the inner tube 1, or the limiting block I1.1 and the inner tube 1 are integrally formed, an elastic part is arranged between the rear end of the outer tube 4 and the limiting block I1.1, the elastic part is arranged outside the outer tube 4, a baffle I7 is arranged at the front end of the sleeve 4.1, the baffle I7 is fixedly connected with the sleeve 4.1, a baffle II 10 is arranged at the rear end of the sleeve 4.1, the baffle II 10 is fixedly connected with the sleeve 4.1, a positioning switch is connected between the inner tube 1 and the outer tube 4, when the positioning switch positions the inner tube 1 and the outer tube 4, the front end of the needle point 2 is positioned outside the outer tube 4, when the positioning switch does not position the inner tube 1 and the outer tube 4, under the action of the elastic part, the front end of the needle tip 2 is located inside the outer tube 4. When the positioning switch positions the inner tube 1 and the outer tube 4, the inner tube 1 and the outer tube 4 do not move relatively, medical staff penetrates the needle point 2 into a blood vessel of a patient, after blood sampling or transfusion operation is completed, the medical staff firstly draws the needle point 2 out of the blood vessel of the patient and then presses the outer tube 4, the inner tube 1 and the outer tube 4 are separated from positioning by controlling the positioning switch, and the needle point 2 enters the inner part of the outer tube 4 under the action of the elastic component; or the medical staff presses the outer tube 4, the inner tube 1 is separated from the outer tube 4 by controlling the positioning switch, and the needle point 2 is automatically drawn out from the blood vessel of the patient and enters the inner part of the outer tube 4 under the action of the elastic component.

The positioning switch comprises a positioning pin 6, a positioning hole II 4.1.2 matched with the positioning pin 6 is arranged on the outer tube 4, and a positioning hole III 1.4 matched with the positioning pin 6 is arranged on the inner tube 1. When locating pin 6 fixes a position inner tube 1 and outer tube 4, the one end setting of locating pin 6 is in locating hole III 1.4, the middle part setting of locating pin 6 is in locating hole II 4.1.2, the other end setting of locating pin 6 is in the outside of outer tube 4, and when inner tube 1 and outer tube 4 need not fix a position, medical personnel can extract locating pin 6 from locating hole III 1.4 and locating hole II 4.1.2.

Or when the inner tube 1 and the outer tube 4 are positioned by the positioning pin 6, one end of the positioning pin 6 is positioned in the positioning hole II 4.1.2, the other end of the positioning pin 6 is positioned in the positioning hole III 1.4, and when the inner tube 1 and the outer tube 4 do not need to be positioned, the positioning pin 6 is completely positioned in the positioning hole III 1.4. When the inner tube 1 and the outer tube 4 do not need to be positioned, the medical staff can push the positioning pin 6 inwards through the positioning hole II 4.1.2 by the inserting nail worn on the finger to completely push the positioning pin 6 into the positioning hole III 1.4.

Be provided with stopper III 1.3 on the inner tube 1, stopper III 1.3 and sleeve 4.1 sliding fit. Under elastomeric element's effect, inner tube 1 slides in sleeve 4.1, stopper III 1.3 can play the effect of direction to the removal of inner tube 1, stability when improving inner tube 1 and remove.

Sleeve 4.1 rear end is provided with limit structure, limit structure is baffle II 10, is provided with baffle II 10 and can avoids inner tube 1 from the interior roll-off of outer tube 4.

The limiting block I1.1 is connected with a connecting piece 5. The connecting piece 5 is a connecting pipe fixedly connected with the rear end of the inner pipe 1, and the connecting piece 5 is used for connecting the novel medical needle head with a blood sampling hose of a blood collector or an infusion hose of an infusion apparatus.

One end of the sleeve 4.1 is fixedly provided with a handle 4.1.1, the handle 4.1.1 is arranged to facilitate the operation of medical staff, and the needle point 2 is punctured into the blood vessel of a patient.

Example 3

As shown in fig. 17 and 18, a novel medical needle comprises an inner tube 1, wherein a needle point 2 is fixedly connected to the front end of the inner tube 1, a liquid channel i 3 is arranged in the inner tube 1, and a liquid channel ii 9 communicated with the liquid channel i 3 is arranged in the needle point 1; the outer tube 4 is sleeved on the inner tube 1, the outer tube 4 comprises a sleeve 4.1, a limiting block II 1.2 is arranged on the inner tube 1, the limiting block II 1.2 is fixedly connected with the inner tube 1 or the limiting block 1.2 and the inner tube 1 are integrally formed, the sleeve 4.1 is connected with a baffle I7, the baffle I7 is arranged in front of the limiting block II 1.2, an elastic part is arranged between the limiting block II 1.2 and the baffle I7, a positioning switch is connected between the inner tube 1 and the outer tube 4, and when the positioning switch positions the inner tube 1 and the outer tube 4, the front end of the needle point 2 is positioned outside the outer tube 4; when the positioning switch does not position the inner tube 1 and the outer tube 4, the front end of the needle point 2 is positioned in the outer tube 4 under the action of the elastic component; the elastic component is always in a compressed state; the elastic component is spring I8, spring I8 cover is established on inner tube 1.

Baffle I7 is connected with sleeve 4.1's middle part, baffle I7 and sleeve 4.1 fixed connection or baffle I7 and sleeve 4.1 integrated into one piece, when positioning switch fixes a position inner tube 1 and outer tube 4, the whole rear portion that sets up in outer tube 4 of elastic component or elastic component partly sets up rear portion, another part setting in outer tube 4 outside.

Be provided with stopper III 1.3 on the inner tube 1, inner tube 1 and stopper III 1.3 fixed connection, perhaps inner tube 1 and stopper III 1.3 integrated into one piece, stopper 1.3 sets up the front end at baffle I7, stopper II 1.2 and/or stopper III 1.3 and sleeve 4.1 sliding fit.

The rear end of the inner pipe 1 is provided with a limiting block I1.1; inner tube 1 and stopper I1.1 fixed connection, perhaps inner tube 1 and stopper I1.1 integrated into one piece.

The rear end of the inner pipe 1 is connected with a connecting piece 5. The connecting piece 5 is a connecting pipe fixedly connected with the rear end of the inner pipe 1, and the connecting piece 5 is used for connecting the novel medical needle head with a blood sampling hose of a blood collector or an infusion hose of an infusion apparatus.

Example 4

As shown in fig. 19 to 22, the present embodiment is different from embodiment 1 in that: limiting structure's front end is provided with barb structure, barb structure includes barb 11, the one end and the sleeve 4.1 rotatable coupling of barb 11, be connected with spring II 12 between barb 11 and the sleeve 4.1, be provided with the recess or the through-hole that hold barb structure on the sleeve 4.1. Under normal conditions, the one end of barb 11 stretches into in the sleeve 4.1 under the effect of spring II 12, when inner tube 1 and outer tube 4 need not fix a position, under the effect of spring I8, inner tube 1 moves backward, stopper II 1.2 promotes barb 11 compression spring II 12 until pressing barb 11 to sleeve 4.1's recess or through-hole in, after stopper II 1.2 passes through the barb structure, the one end of barb 11 resets to sleeve 4.1 under the effect of spring II 12 in, even if promote inner tube 1 forward, stopper II 1.2 can not move forward through the barb structure yet.

The distance between the limiting structure and the barb structure is larger than or equal to the thickness of the limiting block II 1.2. When inner tube 1 and outer tube 4 do not carry on spacingly, stopper II 1.2 can be restricted between limit structure and barb structure, and then restrict needle point 2 in outer tube 4.

In addition, the barb structure can be arranged in other realized structural forms.

Example 5

As shown in fig. 23 to 26, the present embodiment is different from embodiment 2 in that: limiting structure's front end is provided with barb structure, barb structure includes barb 11, the one end and the sleeve 4.1 rotatable coupling of barb 11, be connected with spring II 12 between barb 11 and the sleeve 4.1, be provided with the recess or the through-hole that hold barb structure on the sleeve 4.1. Under normal conditions, the one end of barb 11 stretches into in the sleeve 4.1 under the effect of spring II 12, when inner tube 1 and outer tube 4 need not fix a position, under the effect of spring I8, inner tube 1 moves backward, stopper III 1.3 promotes barb and compression spring II 12 until pressing barb 11 to sleeve 4.1's recess or through-hole in, after stopper III 1.3 passes through the barb structure, the one end of barb 1 resets to sleeve 4.1 under the effect of spring II 12 in, even if promote inner tube 1 forward, stopper III 1.3 can not move forward through the barb structure yet.

Preferably, the distance between the limiting structure and the barb structure is greater than or equal to the thickness of the limiting block III 1.3. When inner tube 1 and outer tube 4 do not carry on spacingly, stopper III 1.3 can be restricted between limit structure and barb structure, and then restrict needle point 2 in outer tube 4.

Example 6

As shown in fig. 27 to 30, the present embodiment is different from embodiment 3 in that: the front end of baffle I7 is provided with barb structure, barb structure includes barb 11, the one end and the sleeve 4.1 rotatable coupling of barb 11, be connected with spring II 12 between barb 11 and the sleeve 4.1, be provided with the recess or the through-hole that hold barb structure on the sleeve 4.1. Under normal conditions, the one end of barb 11 stretches into in the sleeve 4.1 under the effect of spring II 12, when inner tube 1 and outer tube 4 need not fix a position, under the effect of spring I8, inner tube 1 moves backward, stopper III 1.3 promotes barb 11 and compression spring II 12 until pressing barb 11 to sleeve 4.1's recess or through-hole in, after stopper III 1.3 passes through the barb structure, the one end of barb 11 resets to sleeve 4.1 under the effect of spring II 12 in, even if promote inner tube 1 forward, stopper III 1.3 can not move forward through the barb structure yet.

The distance between baffle I7 and the barb structure is greater than or equal to stopper III 1.3's thickness. When inner tube 1 and outer tube 4 do not carry on spacingly, stopper III 1.3 can be restricted between baffle I7 and barb structure, and then restrict needle point 2 in outer tube 4.

Example 7

As shown in fig. 31, the present embodiment is different from embodiment 1 in that: the needle point 2 penetrates through the inner tube 1, and a liquid channel II 9 in the needle point 2 is communicated with the connecting piece 5.

Example 8

As shown in fig. 32, the present embodiment is different from embodiment 2 in that: the needle point 2 penetrates through the inner tube 1, and a liquid channel II 9 in the needle point 2 is communicated with the connecting piece 5.

Example 9

As shown in fig. 33, the present embodiment is different from embodiment 3 in that: the needle point 2 penetrates through the inner tube 1, and a liquid channel II 9 in the needle point 2 is communicated with the connecting piece 5.

Example 10

The novel medical needle can be used on a blood collector and an infusion set.

Example 11

The use method of the novel medical needle comprises the following steps:

(1) the positioning switch positions the inner tube 1 and the outer tube 4 (at the moment, the novel medical needle is in an initial state), the needle point 2 is positioned at the front end of the outer tube 4, and medical staff penetrate the needle point 2 into a blood vessel of a patient; during blood collection, blood enters the liquid channel I3 through the liquid channel II 9, and the liquid channel I3 is connected with a blood collection tube through the connecting piece 5; during transfusion, liquid in a transfusion tube enters the liquid channel I3 through the connecting piece 5, then enters the liquid channel II 9 from the liquid channel I3, and enters a blood vessel of a patient from the liquid channel II 9;

(2) after the blood sampling or transfusion operation is finished, the medical staff firstly draws the needle point 2 out of the blood vessel of the patient, then presses the outer tube 4, the inner tube 1 is separated from the outer tube 4 by controlling the positioning switch, and the needle point 2 enters the inner part of the outer tube 4 under the action of the elastic component; or the medical staff presses the outer tube 4, the inner tube 1 is separated from the outer tube 4 by controlling the positioning switch, and the needle point 2 is automatically drawn out from the blood vessel of the patient and enters the outer tube 4 under the action of the elastic component.

The technical features of the present invention that are not described in the present invention can be realized by or using the prior art, and are not described herein again, and certainly, the above description is not limited to the limitations of the present invention, the present invention is not limited to the above embodiments, and the changes, modifications, additions or replacements made by the technical personnel in the field in the essential scope of the present invention should also belong to the protection scope of the present invention.

Claims

1. A novel medical needle comprises an inner tube (1), wherein a needle point (2) is fixedly connected with the inner tube (1), and a liquid channel II (9) is arranged in the needle point (2); the method is characterized in that: the needle is characterized in that an outer tube (4) is sleeved on the inner tube (1), the outer tube (4) comprises a sleeve (4.1), a limiting block II (1.2) is arranged on the inner tube (1), the sleeve (4.1) is connected with a baffle I (7), the baffle I (7) is arranged in front of the limiting block II (1.2), an elastic component is arranged between the limiting block II (1.2) and the baffle I (7), a positioning switch is connected between the inner tube (1) and the outer tube (4), and when the positioning switch positions the inner tube (1) and the outer tube (4), the front end of the needle point (2) is located outside the outer tube (4); when the positioning switch does not position the inner tube (1) and the outer tube (4), the front end of the needle point (2) is positioned in the outer tube (4) under the action of the elastic component.

2. The new medical needle as set forth in claim 1, wherein: the needle point (2) penetrates through the inner tube (1), or a liquid channel I (3) communicated with the liquid channel II (9) is arranged in the inner tube (1).

3. The new medical needle as set forth in claim 1, wherein: the elastic component is always in a compressed state.

4. The new medical needle as set forth in claim 3, wherein: the elastic part is a spring I (8) or an elastic ring, and the spring I (8) or the elastic ring is sleeved on the inner tube (1).

5. The new medical needle as set forth in claim 1, wherein: the baffle I (7) is connected with the front part of the sleeve (4.1), and when the positioning switch positions the inner tube (1) and the outer tube (4), the elastic component is arranged at the front part in the outer tube (4); or the baffle I (7) is connected with the middle part of the sleeve (4.1), and when the positioning switch positions the inner tube (1) and the outer tube (4), the elastic part is completely arranged at the rear part in the outer tube (4) or one part of the elastic part is arranged at the rear part in the outer tube (4), and the other part of the elastic part is arranged outside the outer tube (4).

6. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: stopper II (1.2) and sleeve (4.1) sliding fit, sleeve (4.1) rear end is connected with limit structure, limit structure is for setting up at the spacing arch (4.1.3) of sleeve (4.1) inner wall or with sleeve (4.1) rear end fixed connection's limiting plate.

7. The new medical needle as set forth in claim 6, wherein: the front end of the limiting structure is provided with a barb structure.

8. The new medical needle as set forth in claim 7, wherein: the barb structure comprises deformable barbs (11).

9. The new medical needle as set forth in claim 7, wherein: the barb structure includes barb (11), the one end and sleeve (4.1) rotatable coupling of barb (11), be connected with spring II (12) between barb (11) and sleeve (4.1), be provided with the recess or the through-hole that hold the barb structure on sleeve (4.1).

10. The new medical needle as set forth in claim 7, wherein: the distance between the limiting structure and the barb structure is greater than or equal to the thickness of a limiting block II (1.2);

or a limiting block III (1.3) is arranged on the inner pipe (1), the limiting block III (1.3) is arranged at the front end of the baffle I (7), and the limiting block II (1.2) and/or the limiting block III (1.3) are/is in sliding fit with the sleeve (4.1).

11. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: the front end of baffle I (7) is provided with barb structure.

12. The new medical needle as set forth in claim 11, wherein: the barb structure comprises deformable barbs (11).

13. The new medical needle as set forth in claim 12, wherein: the barb structure includes barb (11), the one end and sleeve (4.1) rotatable coupling of barb (11), be connected with spring II (12) between barb (11) and sleeve (4.1), be provided with the recess or the through-hole that hold the barb structure on sleeve (4.1).

14. The new medical needle as set forth in claim 12, wherein: the distance between baffle I (7) and the barb structure is greater than or equal to the thickness of stopper III (1.3).

15. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: the rear end of the inner pipe (1) is provided with a limiting block I (1.1).

16. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: the rear end of the inner pipe (1) is connected with a connecting piece (5).

17. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: the lower end face of the outer pipe (4) is a plane.

18. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: one end of the sleeve (4.1) is fixedly provided with a handle (4.1.1).

19. A novel medical needle as claimed in claim 1 or 2 or 3 or 4 or 5 wherein: when the medical needle is not used, a needle cap is sleeved on the needle point (2).

20. The new medical needle as set forth in claim 6, wherein: the positioning switch comprises a positioning pin (6), a positioning hole II (4.1.2) matched with the positioning pin (6) is arranged on the sleeve (4.1), and a positioning hole I (1.2.1) matched with the positioning pin (6) is arranged on the inner tube (1).

21. The new medical needle as set forth in claim 20, wherein: and the positioning hole I (1.2.1) is arranged on the limiting block II (1.2) or the limiting block III (1.3).

22. The new medical needle as set forth in claim 20, wherein: when the positioning pin (6) positions the inner pipe (1) and the outer pipe (4), one end of the positioning pin (6) is arranged in the positioning hole I (1.2.1), the middle part of the positioning pin (6) is arranged in the positioning hole II (4.1.2), the other end of the positioning pin (6) is arranged outside the outer pipe (4), and when the inner pipe (1) and the outer pipe (4) do not need to be positioned, the positioning pin (6) is pulled out of the positioning hole I (1.2.1) and the positioning hole II (4.1.2);

or when the positioning pin (6) positions the inner tube (1) and the outer tube (4), one end of the positioning pin (6) is located in the positioning hole II (4.1.2), the other end of the positioning pin (6) is located in the positioning hole I (1.2.1), and when the inner tube (1) and the outer tube (4) do not need to be positioned, the positioning pin (6) is located in the positioning hole I (1.2.1).

23. A novel medical needle comprises an inner tube (1), wherein a needle point (2) is fixedly connected with the inner tube (1), and a liquid channel II (9) is arranged in the needle point (2); the method is characterized in that: the cover is equipped with outer tube (4) on inner tube (1), the rear portion of inner tube (1) is provided with stopper I (1.1), be provided with elastomeric element between the rear end of outer tube (4) and stopper I (1.1), elastomeric element sets up the outside at outer tube (4), be connected with positioning switch between inner tube (1) and outer tube (4), when positioning switch fixes a position inner tube (1) and outer tube (4), the front end of needle point (2) is located the outside of outer tube (4), when positioning switch does not fix a position inner tube (1) and outer tube (4), under elastomeric element's effect, the front end of needle point (2) is located the inside of outer tube (4).

24. The new medical needle as set forth in claim 23, wherein: the needle point (2) penetrates through the inner tube (1), or a liquid channel I (3) communicated with the liquid channel II (9) is arranged in the inner tube (1).

25. The new medical needle as set forth in claim 23, wherein: the elastic component is always in a compressed state.

26. The new medical needle as set forth in claim 23, wherein: the elastic part is a spring I (8) or an elastic ring, and the spring I (8) or the elastic ring is sleeved on the inner tube (1).

27. The new medical needle as claimed in claim 23 or 24 or 25 or 26, wherein: the positioning switch comprises a positioning pin (6), a positioning hole II (4.1.2) matched with the positioning pin (6) is arranged on the outer tube (4), and a positioning hole III (1.4) matched with the positioning pin (6) is arranged on the inner tube (1).

28. The new medical needle as set forth in claim 27, wherein: when the inner pipe (1) and the outer pipe (4) are positioned by the positioning pin (6), one end of the positioning pin (6) is arranged in the positioning hole III (1.4), the middle part of the positioning pin (6) is arranged in the positioning hole II (4.1.2), the other end of the positioning pin (6) is arranged outside the outer pipe (4), and when the inner pipe (1) and the outer pipe (4) do not need to be positioned, the positioning pin (6) is pulled out from the positioning hole III (1.4) and the positioning hole II (4.1.2);

or when the inner pipe (1) and the outer pipe (4) are positioned by the positioning pin (6), one end of the positioning pin (6) is positioned in the positioning hole II (4.1.2), the other end of the positioning pin (6) is positioned in the positioning hole III (1.4), and when the inner pipe (1) and the outer pipe (4) do not need to be positioned, the positioning pin (6) is completely positioned in the positioning hole III (1.4).

29. The new medical needle as claimed in claim 23 or 24 or 25 or 26, wherein: be provided with stopper III (1.3) on inner tube (1), stopper III (1.3) can with sleeve (4.1) sliding fit.

30. The new medical needle as set forth in claim 29, wherein: the rear end of the sleeve (4.1) is provided with a limiting structure, the limiting structure is a limiting bulge (4.1.3) arranged on the inner wall of the sleeve (4.1), or the limiting structure is a baffle II (10) connected with the rear end of the sleeve (4.1).

31. The new medical needle as set forth in claim 30 wherein: the elastic part is arranged between the baffle II (10) and the limiting block I (1.1).

32. The new medical needle as set forth in claim 30 wherein: the front end of the limiting structure is provided with a barb structure.

33. The new medical needle as set forth in claim 32 wherein: the barb structure comprises deformable barbs (11).

34. The new medical needle as set forth in claim 32 wherein: the barb structure includes barb (11), the one end and sleeve (4.1) rotatable coupling of barb (11), be connected with spring II (12) between barb (11) and sleeve (4.1), be provided with the recess or the through-hole that hold the barb structure on sleeve (4.1).

35. The new medical needle as set forth in claim 32 wherein: the distance between the limiting structure and the barb structure is larger than or equal to the thickness of the limiting block III (1.3).

36. The new medical needle as claimed in claim 23 or 24 or 25 or 26, wherein: the limiting block I (1.1) is connected with a connecting piece (5).

37. The new medical needle as claimed in claim 23 or 24 or 25 or 26, wherein: the lower end face of the outer pipe (4) is a plane.

38. The new medical needle as set forth in claim 29, wherein: one end of the sleeve (4.1) is fixedly provided with a handle (4.1.1).

39. The new medical needle as claimed in claim 23 or 24 or 25 or 26, wherein: when the medical needle is not used, a needle cap is sleeved on the needle point (2).