CN214804734U

CN214804734U - Quantitative blood sampling device for medical science

Info

Publication number: CN214804734U
Application number: CN202120679022.0U
Authority: CN
Inventors: 兰迪; 罗淑颖; 张耀东
Original assignee: Henan Childrens Hospital Zhengzhou Childrens Hospital
Current assignee: Henan Childrens Hospital Zhengzhou Childrens Hospital
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-23
Anticipated expiration: 2031-04-02

Abstract

The utility model relates to a medical equipment technical field, concretely relates to quantitative blood sampling device is used to medical science, including blood taking needle and retraction mechanism, wherein, the blood taking needle is used for impaling human epidermis, and retraction mechanism includes: the device comprises a sleeve, a limiting pipe, a locking pin, a convex part and a tension spring; the sleeve is sleeved outside the blood taking needle, and the side surface of the sleeve is provided with a locking hole; the limiting pipe is fixedly connected to the outer wall of the blood taking needle positioned in the sleeve, and a limiting hole is formed in the side face of the limiting pipe; the locking pin penetrates through the locking hole and is inserted into the limiting hole; the convex part is fixedly connected with the inner side wall of the sleeve; two ends of the tension spring are respectively fixedly connected with the convex part and the limiting pipe; after the locking pin is extracted, the blood taking needle retracts into the sleeve under the tension action of the tension spring, the utility model discloses after using, the blood taking needle can retract in time, prevent to stab the doctor, cause the infection.

Description

Quantitative blood sampling device for medical science

Technical Field

The utility model relates to a medical equipment technical field, concretely relates to medical science is with ration blood sampling device.

Background

Blood sampling is one of the most common ways in medical testing. The demand of blood taking needles in hospitals is extremely high, the existing blood taking needles have certain defects, and after the blood taking of doctors is finished, a small amount of blood can be left on the needle heads of the blood taking needles, and if the blood taking needles are accidentally touched, cross infection is easy to occur; when the garbage bag is treated in a centralized way, the garbage bag is easy to pierce and cause pollution. The existing blood taking needles do not have a certain protection mechanism to prevent the occurrence of the situations.

SUMMERY OF THE UTILITY MODEL

First, technical problem to be solved

An object of the utility model is to provide a medical science is with quantitative blood sampling device, after using, can in time contract the blood taking needle, prevents to stab the doctor, causes the infection.

Second, technical scheme

The utility model discloses a realize through following technical scheme: the utility model provides a medical science is with quantitative blood sampling device, including blood taking needle and retraction mechanism, wherein, the blood taking needle is used for impaling human epidermis, retraction mechanism includes:

the sleeve is sleeved outside the blood taking needle, and a locking hole is formed in the side face of the sleeve;

the limiting pipe is fixedly connected to the outer wall of the blood taking needle positioned in the sleeve, and a limiting hole is formed in the side surface of the limiting pipe;

the locking pin penetrates through the locking hole and is inserted into the limiting hole;

the protruding part is fixedly connected to the inner side wall of the sleeve;

the two ends of the tension spring are fixedly connected with the convex part and the limiting pipe respectively;

after the locking pin is pulled out, the blood taking needle retracts into the sleeve under the action of the tension spring.

Further, encircle the locking round pin and be provided with a plurality of connecting bands between the lateral wall of locking hole and locking round pin, the connecting band is the plastics material that easily tears, its and sleeve pipe integrated into one piece.

Furthermore, the outer end of the locking pin is fixedly connected with a pull ring.

Further, the tail of the blood taking needle is connected with a hose which extends out of the sleeve and is communicated with a puncture needle; still include the negative pressure heparin tube, be provided with on the negative pressure heparin tube terminal surface and hinder the blood cover.

Further, the negative pressure blood sampling tube is made of transparent materials, and scales are arranged on the outer wall of the negative pressure blood sampling tube.

Third, beneficial effect

Compared with the prior art, the utility model, following beneficial effect has:

the utility model provides a medical quantitative blood sampling device, when sampling blood, the locking pin passes through the locking hole and is inserted into the limiting hole, and the position of the blood sampling needle is fixed for sampling blood; after the blood sampling is accomplished, extract the locking round pin, the extension spring is contracted and is driven the blood taking needle through spacing pipe and retract, and the blood taking needle enters into the cover intraductal, can prevent effectively that the syringe needle mistake from touching the human body, causes cross infection. The utility model discloses the structure is simple and easy, and the cost is lower, easily uses widely.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is a schematic structural diagram of the present invention;

FIG. 3 is a partial front schematic view of a ferrule;

1-blood taking needle; 2-a retraction mechanism; 21-a sleeve; 211-a locking hole; 22-a limiting tube; 221-limiting hole; 23-a locking pin; 231-a tab; 24-a projection; 25-a tension spring; 3-a hose; 4-negative pressure blood collection tube; 41-blood blocking sleeve; 42-scale mark; 5-puncturing the needle; 6-connecting the belt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-2, the quantitative blood sampling device for medical use of the present invention comprises a blood sampling needle 1 and a retraction mechanism 2, wherein the blood sampling needle 1 is a hollow tubular structure with a sharp-pointed end for puncturing the epidermis of the human body, which is a common blood sampling needle structure; be different from traditional split type blood taking needle, the utility model discloses in on the basis of common blood taking needle, further pioneered ground has added return mechanism 2 that contracts, return 2 major structure of mechanism that contracts includes: the sleeve 21, the limiting pipe 22, the locking pin 23, the convex part 24 and the tension spring 25; wherein, the sleeve 21 is sleeved outside the blood taking needle 1, one end of the sharp thorn of the blood taking needle 1 extends out of the sleeve 21, and the other end is positioned in the sleeve 21; the blood taking needle 1 is positioned on the outer wall of one section of the sleeve 21 and is fixedly connected with a limiting pipe 22; moreover, as shown in fig. 1, a locking hole 211 is formed in the side surface of the sleeve 21, as shown in fig. 2, a limiting hole 221 is formed in the side surface of the limiting tube 22, and the locking hole 211 and the limiting block 221 have the same shape and the same aperture; the cross section of the locking pin 23 is the same as that of the locking hole 211, the locking pin 23 is of a columnar structure with a slightly small size, and the locking pin 23 penetrates through the locking hole 211 and is inserted into the limiting hole 221 to play a role in locking the position of the blood taking needle 1; a convex part 24 is fixedly connected with the inner side wall of the sleeve 21, and the convex part 24 can be integrally formed with the sleeve 21; the protrusion 24 and the side wall of the limiting tube 22 are connected by a tension spring 25, and in an initial position, the locking pin 23 is inserted into the limiting hole 221, and at this time, the tension spring 25 is in a maximum extension state. After the blood collection is completed, the locking pin 23 is pulled out, and the blood collection needle 1 retracts into the sleeve 21 under the action of the tension spring 25. To ensure the retraction effect, the extension and retraction stroke of the tension spring 25 cannot be shorter than the distance that the lancet 1 is extended to the outside of the casing 21 at the initial position, thereby further ensuring that the lancet 1 is effectively retracted, and preferably, the extension and retraction stroke of the tension spring 25 is 3 to 7mm longer than the distance that the lancet 1 is extended to the outside of the casing 21 at the initial position.

The working principle is as follows: the utility model has an initial state and a retraction state; during blood collection, the locking pin 23 penetrates through the locking hole 211 and is inserted into the limiting hole 221 to lock the position of the blood taking needle 1, and the blood taking needle 1 is inserted into the body surface of a patient to collect blood; after the blood sampling is completed, the locking pin 23 is pulled out, the tension spring 25 retracts, the tension spring 25 drives the limiting pipe 22, and the limiting pipe 22 drives the blood sampling needle 1, so that the blood sampling needle 1 retracts into the sleeve pipe 21, and the human body is prevented from being accidentally injured when the blood sampling needle is discarded.

As a preferable scheme of the present invention, please refer to fig. 3, a plurality of connecting bands 6 are disposed between the locking hole 211 and the outer sidewall of the locking pin 23, the connecting bands 6 are disposed around the outer circumferential wall of the locking pin 23, the connecting bands 6 are easy to be torn apart, and the outer end of the locking pin 23 is fixedly connected with a pull ring 231. After the blood collection is completed, the pull ring 231 is pulled to drive the locking pin 23 to be pulled out, and the connecting band 6 is pulled apart at the same time. The setting of connecting band 6 can prevent effectively that locking pin 23 from extracting carelessly before abandoning, causes the waste. Preferably, the connecting band 6 is made of plastic and is integrally formed with the sleeve 21.

As a preferred embodiment of the present invention, please refer to fig. 1-2, based on the above two embodiments, in order to cooperate with blood sampling, in this embodiment, the tail of the blood sampling needle 1 is connected with a flexible tube 3, and the flexible tube 3 extends out of the sleeve 21 and is communicated with a puncture needle 5; the blood collecting device is also provided with a negative pressure blood collecting tube 4 made of transparent material, a certain negative pressure is arranged in the negative pressure blood collecting tube 4, the end face of the negative pressure blood collecting tube is provided with a blood blocking sleeve 41, during blood collection, the puncture needle 5 is punctured into the blood blocking sleeve 41 and inserted into the negative pressure blood collecting tube 4, and blood flows into the negative pressure blood collecting tube 4 under the action of the negative pressure to finish blood collection. In this embodiment, scales 42 are provided on the outer wall of the negative pressure blood collection tube 4 to achieve quantitative blood collection.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. The utility model provides a medical science is with ration blood sampling device which characterized in that, includes blood taking needle and retraction mechanism, wherein, the blood taking needle is used for impaling human epidermis, retraction mechanism includes:

the fixed block is fixedly connected to the inner side wall of the sleeve;

the two ends of the tension spring are respectively fixedly connected with the fixed block and the limiting pipe;

2. The device of claim 1, wherein a plurality of connecting strips are disposed around the locking pin between the locking hole and the outer sidewall of the locking pin, the connecting strips are made of easily breakable plastic and are integrally formed with the sleeve.

3. The device of claim 1, wherein a pull ring is fixedly connected to an outer end of the locking pin.

4. A quantitative blood sampling device for medical use according to any one of claims 1 to 3, wherein a flexible tube is connected to the tail of the blood sampling needle, the flexible tube extending to the outside of the casing and communicating with the puncture needle; still include the negative pressure heparin tube, be provided with on the negative pressure heparin tube terminal surface and hinder the blood cover.

5. The quantitative blood sampling device for medical purpose according to claim 4, wherein said negative pressure blood sampling tube is made of transparent material and has graduations on its outer wall.