CN108742654B - Blood taking needle holder - Google Patents

Abstract

The invention discloses a blood taking needle holder, which belongs to the technical field of medical appliances and comprises a blood taking tube sleeve and a blood taking needle fixing sleeve, wherein the blood taking needle fixing sleeve is movably arranged at the top end of the blood taking tube sleeve; the blood taking needle fixing sleeve is of an independent cylindrical structure, the blood taking needle fixing sleeve comprises a shell and an inner clamping sleeve connected with the shell, the outer portion of the clamping sleeve is of an inverted cone structure, the clamping sleeve is composed of a plurality of arc clamping rings, the outer edges of the upper ends of the clamping rings are evenly distributed along a circular opening at the upper end of the blood taking needle fixing sleeve, gaps are formed between adjacent clamping rings, and a hollow structure is arranged between the outer surface of the clamping sleeve and the inner wall of the shell. The invention has simple structure, convenient loading and unloading and use of the blood taking needle, difficult looseness of the blood taking needle in the use process, no position deviation, convenient operation and long service life.

Description

A blood collection needle holder

Technical field

The invention belongs to the technical field of medical instruments, and specifically relates to a needle holder for blood collection needles.

Background technique

We know that blood collection needles and blood collection tubes are indispensable tools for the blood collection process. In the past, traditional syringes were commonly used to draw blood, and then transferred to blood collection tubes for inspection and other operations; in recent years, one-step direct blood collection with vacuum tubes has become a more advanced blood collection method. The one-step direct blood collection with vacuum tube uses three sets of blood collection equipment: a double-ended blood collection needle, a needle holder, and a vacuum blood collection tube. The existing needle holder mainly includes a blood collection needle connection seat and a blood collection tube outer sleeve. The blood collection needle connection seat is located at the front end of the outer sleeve. After the double-ended blood collection needle is installed and fixed, one end is located at the front end of the needle holder for puncture, and the other end is located at the front end of the needle holder. The outer tube of the needle holder is used to connect with the vacuum blood collection tube to collect blood. After the blood collection is completed, both hands must be operated at the same time to separate the needle holder from the double-ended blood collection needle and dispose of the blood collection needle. The operation is cumbersome and complicated, and the exposed needle also poses a great unsafe factor. If the needle holder and the blood collection needle are not separated and the two sets are processed at the same time, the needle holder and the blood collection needle can only be used once, which also increases the cost of blood collection. In addition, the existing way of fixing the blood collection needle holder is mainly through springs or threads. However, after repeated use, the connection between the blood collection needle and the needle holder is prone to loosening. During the blood collection process, the blood collection needle becomes loose. It is easy to fall off, and it is difficult to control the direction and movement of the blood collection needle during the blood collection process. Therefore, it is also difficult to control the working status of the blood collection needle, which brings safety risks to patients when collecting blood.

As a person skilled in the art, it is necessary to propose technical improvements to the shortcomings of the existing technology and provide a blood collection needle holder that is easy to assemble and disassemble, has good operational stability, and has a long service life.

Contents of the invention

In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a blood collection needle needle holder, which has a simple structure, is easy to assemble, disassemble, and use the blood collection needle. The blood collection needle is not easy to loosen during use, does not cause position deviation, and is easy to operate. Convenient and long service life.

The purpose of the present invention is achieved through the following technical solutions:

A blood collection needle holder includes a blood collection tube sleeve and a blood collection needle fixed sleeve. The blood collection needle fixed sleeve is movably installed on the top of the blood collection tube sleeve. The upper end of the blood collection tube sleeve is provided with a cylindrical ring. Protrusion, the interior of the cylindrical protrusion is provided with a countersunk hole, the countersunk hole is connected to the interior of the blood collection tube sleeve; the blood collection needle fixed sleeve is an independent cylindrical structure, and the blood collection needle fixed sleeve includes a shell and a The inner ferrule connected to it has an inverted conical structure on the outside. The ferrule is composed of a plurality of arc-shaped clasps. The outer edge of the upper end of the clasp is along the circular opening at the upper end of the blood collection needle fixing sleeve. Evenly distributed, there are gaps between adjacent snap rings, and there is a hollow structure between the outer surface of the ferrule and the inner wall of the housing; push the outer surface of the ferrule downward along the surface of the counterbore in the cylindrical protrusion. When inserted, the inner wall of the shell and the outer surface of the cylindrical protrusion fit together, the gap between adjacent snap rings in the ferrule shrinks, and the ferrule shrinks to clamp the blood collection needle.

Further, the edge of the circular opening at the upper end of the cylindrical protrusion extends outward to form a circle of bosses, the bottom edge of the housing extends inward to form a circle of bosses, and the blood collection needle fixing sleeve passes through the upper and lower sides The boss is used for limiting.

Further, the lower end of the blood collection tube sleeve is provided with an opening, and the interior of the blood collection tube sleeve is a hollow structure.

Further, the counterbore has a tapered structure that is wide at the top and narrow at the bottom, and the transverse circular cross-sectional diameter of the counterbore gradually becomes smaller from top to bottom.

Preferably, the ferrule and the blood collection needle fixing sleeve are an integrally formed structure.

Preferably, the interior of the ferrule has a cylindrical structure, and the inner surface of the ferrule is provided with threads. When the clasp forming the ferrule is tightly closed, the inner threads of the ferrule match the threads on the blood collection needle to fix the blood collection needle.

Further, the number of snap rings constituting the ferrule is 2 or more.

Preferably, the number of snap rings constituting the ferrule is three.

Preferably, the ferrule is made of deformable material.

Compared with the prior art, the present invention at least has the following beneficial effects or advantages:

Through the above technical solution of the present invention, the structure of the existing blood collection needle holder is improved, the original blood collection needle fixation method is changed, and a circle of cylindrical protrusions is provided at the upper end of the blood collection tube sleeve, and the cylindrical protrusion The inside of the blood collection tube sleeve is connected to the inside of the blood collection tube sleeve through a counterbore; the blood collection needle fixing sleeve is set separately on the top of the blood collection tube sleeve. The blood collection needle fixing sleeve is composed of an outer shell and an internal card sleeve. The card sleeve is composed of multiple arc-shaped clamps. The ferrule is composed of rings. The ferrule has an inverted conical structure as a whole. The ferrule is installed in conjunction with the counterbore. The upper edge of the cylindrical protrusion has a circle of bosses extending outward, and the bottom edge of the shell extends inward to form a circle of bosses. External force Under the action, the blood collection needle fixing sleeve is fastened above the blood collection tube sleeve. During the specific operation, push the ferrule downward along the surface of the counterbore until the inner wall of the shell and the outer surface of the cylindrical protrusion are completely fitted. , at this time, the gap between adjacent snap rings in the card sleeve is reduced, and the blood collection needle is rotated and fixed on the blood collection needle sleeve. When disassembling, you only need to push the card sleeve upwards with one hand, and the gap between the snap rings gradually recovers, and the card is When the sleeve is loosened, the blood collection needle automatically falls off, so the loading and unloading process of the blood collection needle is very convenient, and under the limiting action of the bosses on both sides of the upper and lower sides, the blood collection needle fixed sleeve will not easily separate from the blood collection tube sleeve; the clamp used in the present invention The sleeve and the countersunk hole are held together very firmly. The blood collection needle is not easy to loosen during use, does not cause position deviation, and has a long service life.

Description of the drawings

Figure 1 is a structural perspective view of the blood collection needle needle holder in an embodiment of the present invention when it is pushed in and tightly closed;

Figure 2 is a structural perspective view of the blood collection needle holder in the pushed and released state according to the embodiment of the present invention;

Figure 3 is a structural cross-sectional view of the blood collection needle holder in the embodiment of the present invention when it is pushed in and tightly closed;

Figure 4 is a structural cross-sectional view of the blood collection needle holder in the pushed and released state according to the embodiment of the present invention;

Figure 5 is a schematic structural diagram of a blood collection tube sleeve in an embodiment of the present invention;

Figure 6 is a schematic structural diagram of a blood collection needle fixing sleeve in an embodiment of the present invention.

In the picture: 1-blood collection tube sleeve; 11-cylindrical protrusion; 12-counterbore; 2-blood collection needle fixed sleeve; 21-casing; 22-card sleeve; 23-circlip; 24-gap; 25-thread ;3-Boss.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms, such as those defined in general dictionaries, are to be understood to have meanings consistent with their meaning in the context of the prior art, and are not used in an idealized or overly formal meaning unless specifically defined. to explain.

Example

As shown in Figures 1 to 4, a blood collection needle needle holder provided in this embodiment includes a blood collection tube sleeve 1 and a blood collection needle fixing sleeve 2. The blood collection needle fixing sleeve 2 is movably installed on the blood collection tube sleeve 1. At the top, the upper end of the blood collection tube sleeve 1 is provided with a circle of cylindrical protrusions 11, and the inside of the cylindrical protrusion 11 is provided with a countersunk hole 12, which is connected to the inside of the blood collection tube sleeve 1; the blood collection needle fixed sleeve 2 is independent Cylindrical structure, the blood collection needle fixing sleeve 2 includes a shell 21 and a ferrule 22 arranged inside the ferrule. The ferrule 22 has an inverted conical structure on the outside. The ferrule 22 is composed of a plurality of arc-shaped snap rings 23. The snap ring 23 The outer edge of the upper end is evenly distributed along the circular opening of the upper end of the blood collection needle fixing sleeve 2. There is a gap 24 between adjacent snap rings 23. There is a hollow structure between the outer surface of the ferrule 22 and the inner wall of the housing 21; Push downward along the surface of the counterbore 12 in the cylindrical protrusion 11, the inner wall of the housing 21 and the outer surface of the cylindrical protrusion 11 fit together, and the gap between adjacent snap rings 23 in the ferrule 22 Shrink, the card sleeve 22 shrinks to clamp the blood collection needle.

Further, the edge of the circular opening at the upper end of the cylindrical protrusion 11 extends outward to form a circle of bosses 3, the bottom edge of the housing 21 extends inward to form a circle of bosses 3, and the blood collection needle fixing sleeve 2 passes through the upper and lower sides. Boss 3 is used for limiting.

In a specific implementation process, the lower end of the blood collection tube sleeve 1 is provided with an opening, and the interior of the blood collection tube sleeve 1 is a hollow structure; the vacuum blood collection tube is placed inside the blood collection tube sleeve 1 through the opening.

Further, the counterbore 12 has a tapered structure with a wide top and a narrow bottom. The transverse circular cross-sectional diameter of the counterbore 12 gradually becomes smaller from top to bottom. That is, the diameter of the circular opening at the upper end of the counterbore 12 is the largest, and the diameter of the circular opening at the lower end of the counterbore 12 is the largest. The circular opening has the smallest diameter.

Preferably, the cylindrical protrusion 11 and the blood collection tube sleeve 1 are of an integrally formed structure, and the ferrule 22 and the blood collection needle fixing sleeve 2 are of an integrally formed structure.

The interior of the ferrule 22 has a cylindrical structure, and the inner surface of the ferrule 22 is provided with threads 25. When the snap ring 23 forming the ferrule 22 is tightly closed, the inner threads 25 of the ferrule 22 match the threads on the blood collection needle to fix the blood collection. Needle.

As an optional or preferred embodiment of the present invention, the number of snap rings 23 constituting the ferrule 22 is two or more.

As the most preferred, the number of snap rings 23 constituting the ferrule 22 is three.

Preferably, the ferrule 22 is made of deformable material, such as plastic, synthetic resin, etc.

In the specific implementation process, the middle part of the blood collection needle is provided with a convex structure for installation with the ferrule. The surface of the convex structure is provided with threads to facilitate the cooperation with the inner threads of the ferrule to fix the blood collection needle.

The use method of the blood collection needle needle holder of the present invention is described below with reference to the accompanying drawings:

Installation stage: Hold the blood collection tube sleeve in one hand and the blood collection needle in the other hand. Put the bleeding end of the blood collection needle through the ferrule and put it into the blood collection tube sleeve. The convex structure in the middle of the blood collection needle is exactly placed in the ferrule. At this time, push the blood collection needle fixing sleeve downward along the cylindrical protrusion with one hand until the inner wall of the housing and the outer surface of the cylindrical protrusion are completely fitted. At this time, the gap between adjacent snap rings in the ferrule is reduced. , the card sleeve deforms and shrinks to clamp the blood collection needle, and at the same time, the inner thread of the card sleeve matches the thread on the blood collection needle to fix the blood collection needle. Finally, the vacuum blood collection tube is inserted into the blood collection tube sleeve, and the bleeding end of the blood collection needle is inserted into the vacuum blood collection tube. The doctor holds the blood collection tube sleeve to operate the patient's veins.

Disassembly stage: After the blood collection is completed, hold the blood collection tube sleeve with one hand and push the card sleeve upward. The gap between the snap rings will gradually recover, the card sleeve will loosen, and the blood collection needle will automatically fall off. The disassembly process is convenient, and because there are two holes on the upper and lower sides, There is a boss, and under the limiting effect of the boss, it is ensured that the blood collection needle fixed sleeve will not separate from the blood collection tube sleeve, making it easy to operate and use repeatedly.

Compared with the prior art, the present invention at least has the following beneficial effects or advantages:

Through the above technical solution of the present invention, the structure of the existing blood collection needle holder is improved, the original blood collection needle fixation method is changed, and a circle of cylindrical protrusions is provided at the upper end of the blood collection tube sleeve, and the cylindrical protrusion The inside of the blood collection tube sleeve is connected to the inside of the blood collection tube sleeve through a counterbore; the blood collection needle fixing sleeve is set separately on the top of the blood collection tube sleeve. The blood collection needle fixing sleeve is composed of an outer shell and an internal card sleeve. The card sleeve is composed of multiple arc-shaped clamps. The ferrule is composed of rings. The ferrule has an inverted conical structure as a whole. The ferrule is installed in conjunction with the counterbore. The upper edge of the cylindrical protrusion has a circle of bosses extending outward, and the bottom edge of the shell extends inward to form a circle of bosses. External force Under the action, the blood collection needle fixing sleeve is fastened above the blood collection tube sleeve. During the specific operation, put one end of the double-ended blood collection needle into the ferrule, and then push the ferrule downward along the surface of the countersunk hole until it reaches the inner wall of the shell. It completely fits the outer surface of the cylindrical protrusion. At this time, the gap between adjacent snap rings in the ferrule shrinks, and the ferrule deforms and shrinks to clamp the blood collection needle. When disassembling, you only need to push the ferrule upwards with one hand. , the gap between the snap rings gradually recovers, the ferrule is loosened, and the blood collection needle automatically falls off, so the loading and unloading process of the blood collection needle is very convenient, and under the limiting effect of the upper and lower bosses, the blood collection needle fixed sleeve will not easily fall off Separate from the blood collection tube sleeve; the clamping sleeve and the countersunk hole used in the present invention are held together very firmly, the blood collection needle is not easy to loosen during use, does not cause position deviation, and has a long service life.

The present invention is not limited to the above-mentioned optional embodiments. Anyone can produce various other forms of products under the inspiration of the present invention. However, regardless of any changes in its shape or structure, any product that falls within the scope of the claims of the present invention can All technical solutions within the scope fall within the protection scope of the present invention.

Claims (7)

1. A blood collection needle needle holder, characterized in that it includes a blood collection tube sleeve and a blood collection needle fixed sleeve. The blood collection needle fixed sleeve is movably installed on the top of the blood collection tube sleeve. A cylindrical protrusion is provided at the upper end, and a countersunk hole is provided inside the cylindrical protrusion. The countersunk hole is connected to the inside of the blood collection tube sleeve; the blood collection needle fixing sleeve is an independent cylindrical structure, and the blood collection needle is The fixed sleeve includes an outer shell and an internal ferrule connected thereto. The exterior of the ferrule has an inverted conical structure. The ferrule is composed of a plurality of arc-shaped clasps. The outer edge of the upper end of the clasp is fixed along the blood collection needle. The circular openings at the upper end are evenly distributed, and there are gaps between adjacent snap rings. There is a hollow structure between the outer surface of the ferrule and the inner wall of the housing; The surface of the hole is pushed downward, and the inner wall of the housing fits the outer surface of the cylindrical protrusion. The gap between adjacent snap rings in the ferrule shrinks, and the ferrule shrinks to clamp the blood collection needle; The counterbore is a tapered structure that is wide at the top and narrow at the bottom, and the transverse circular cross-sectional diameter of the counterbore gradually becomes smaller from top to bottom; The interior of the ferrule has a cylindrical structure, and the inner surface of the ferrule is provided with threads. When the snap ring constituting the ferrule is tightly closed, the inner threads of the ferrule match the threads on the blood collection needle to fix the blood collection needle. 2. The blood collection needle holder according to claim 1, wherein the edge of the circular opening at the upper end of the cylindrical protrusion extends outward to form a circle of bosses, and the bottom edge of the housing extends inward. A circle of bosses is formed, and the blood collection needle fixing sleeve is limited by the bosses on the upper and lower sides. 3. The blood collection needle holder according to claim 1, wherein the lower end of the blood collection tube sleeve is provided with an opening, and the interior of the blood collection tube sleeve is a hollow structure. 4. The blood collection needle needle holder according to claim 1, characterized in that the ferrule and the blood collection needle fixing sleeve are an integrally formed structure. 5. The blood collection needle holder according to claim 1, wherein the number of snap rings constituting the ferrule is two or more. 6. The blood collection needle holder according to claim 5, wherein the number of snap rings constituting the ferrule is three. 7. The blood collection needle holder according to claim 1, wherein the ferrule is made of deformable material.