CN210962005U

CN210962005U - Blood taking needle

Info

Publication number: CN210962005U
Application number: CN201921046243.3U
Authority: CN
Inventors: 郭晓燕; 栾晶
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-06
Filing date: 2019-07-06
Publication date: 2020-07-10
Anticipated expiration: 2029-07-06

Abstract

The utility model discloses a blood taking needle, including first needle and tail needle, its characterized in that: the first needle is communicated with the first blood guide tube, the first blood guide tube is communicated with the blocker, the blocker is communicated with the second blood guide tube, the second blood guide tube is communicated with the tail needle, the blocker comprises a valve body, a push cap and a dustproof cap, the valve body is communicated with the first blood guide tube, a return spring is arranged between a moving seat and the bottom of the first blood cavity, a piston body can move up and down in the second blood cavity, the end part of a piston body is arranged at the upper part of the second blood cavity under the action of the return spring, a transition hole is not communicated with a blood guide groove, the end part of the piston body moves to the lower part of the second blood cavity when the piston body is stressed, the transition hole is communicated with the blood guide groove, a hollow push rod is arranged in the middle of the push cap, the hollow push rod penetrates through the push cap and is communicated with the second blood guide tube, the hollow push rod is arranged in the second blood cavity. The utility model discloses the advantage has: simple structure, convenient for blood sampling for many times and small harm to human body.

Description

Blood taking needle

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a blood taking needle.

Background

A venous blood lancet is a blood lancet used for collecting blood samples during medical examination. The blood taking needle at the top end is used for puncturing a blood vessel, the transparent hose at the tail end is connected with a tail needle, the tail needle is wrapped by a rubber hose and is externally sleeved with a needle cap which is used for puncturing a vacuum blood taking test tube and sucking blood into the tube by using negative pressure in the test tube; the existing venous blood taking needle needs to be discarded after once blood collection, when blood is taken at intervals, the blood vessel of a patient needs to be pricked again each time the blood is taken, and the blood becomes silted up if the blood is not properly treated, so that the blood can be accidentally injured due to the fact that the blood is dodged in the blood taking process of a young patient or an uncooperative patient, and the needle head is infected; in addition, especially, the young is likely to suffer from bruise due to multiple needle insertions, which may cause physical damage. Therefore, it is important to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The invention overcomes the defects of the prior art and provides the blood taking needle which is simple in structure, convenient for taking blood for many times and small in harm to a human body.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a blood taking needle comprises a head needle and a tail needle, and is characterized in that: the first needle is communicated with a first blood guide tube, the first blood guide tube is communicated with a blocker, the blocker is communicated with a second blood guide tube, the second blood guide tube is communicated with a tail needle, the blocker comprises a valve body, a push cap and a dustproof cap, the push cap and the dustproof cap can be in threaded connection with the valve body, the top of the dustproof cap is connected with the valve body through an elastic piece, the valve body is communicated with the first blood guide tube, a first blood cavity and a second blood cavity are arranged inside the valve body, the diameter of the first blood cavity is larger than that of the second blood cavity, the first blood cavity and the second blood cavity are coaxial with the valve body, a moving seat is arranged in the first blood cavity, a return spring is arranged between the moving seat and the bottom of the first blood cavity, and a protrusion is arranged on the moving seat between the side wall of the moving seat and the side wall contact surface of the first blood cavity, the side wall of the first blood cavity at the position corresponding to the bulge is provided with a guide groove, the bulge is arranged in the guide groove, through holes are uniformly distributed on the movable seat around the axis, the center of the top end of the movable seat is connected with a piston body, the piston body can move up and down in the second blood cavity, the end part of the piston body is provided with a counter bore, the side wall of the piston body close to the end part is provided with a transition hole, the transition hole is communicated with the counter bore, the side wall of the lower part of the second blood cavity at the position corresponding to the transition hole is uniformly distributed with blood guide grooves, the blood guide grooves are communicated with the first blood cavity, the end part of the piston body is arranged at the upper part of the second blood cavity under the action of the return spring, and the transition hole is not communicated with the blood guide grooves, when the piston body is stressed, the end part of the piston body moves to the, the transition hole is communicated with the blood guide groove, a hollow push rod is arranged in the middle of the push cap, the hollow push rod penetrates through the push cap and is communicated with the second blood guide pipe, the hollow push rod is arranged in the second blood cavity and can push the piston body, and the hollow push rod is communicated with the counter bore.

Further, the first needle is an indwelling needle.

Further, the movable seat, the protrusion and the piston body are integrally formed.

Further, the hollow push rod and the push cap are integrally formed.

Compared with the prior art, the invention has the advantages that: aiming at the patients who take blood at intervals, the needle can be reserved, the next blood taking is convenient, and the blood vessel of the patients is prevented from being punctured for many times; the times of needle insertion are reduced, the occurrence of the condition of bruise caused by multiple needle insertion can be avoided, and the injury to the human body is small; only the needle head part connected with the vacuum blood sampling test tube needs to be replaced for blood sampling again, and consumables are saved.

Drawings

FIG. 1 is a schematic front view of a lancet according to the present invention;

FIG. 2 is a schematic sectional view showing the structure of an occluder for a blood lancet of the present invention, in which a dust cap is attached to a valve body, which is closed;

FIG. 3 is a schematic sectional view showing the structure of an occluder for a blood lancet of the present invention, in which a push cap is attached to a valve body, which is in an open state;

FIG. 4 is an enlarged view of the blood collection needle A of FIG. 3.

In the figure, 1, a head needle, 2, a tail needle, 3, a first blood guide tube, 4, a second blood guide tube, 5, a valve body, 6, a pushing cap, 7, a dust cap, 8, a first blood cavity, 9, a second blood cavity, 10, a moving seat, 11, a return spring, 12, a bulge, 13, a guide groove, 14, a through hole, 15, a piston body, 16, a counter bore, 17, a transition hole, 18, a blood guide groove and 19, a hollow pushing rod.

Detailed Description

The following examples are intended to further illustrate the present invention and should not be construed as limiting the scope of the invention, and other insubstantial modifications and adaptations of the invention by those skilled in the art based on the teachings herein are intended to be covered thereby.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In fig. 1 to 4, 1 is a head needle, 2 is a tail needle, 3 is a first blood guide tube, 4 is a second blood guide tube, 5 is a valve body, 6 is a push cap, 7 is a dust cap, 8 is a first blood cavity, 9 is a second blood cavity, 10 is a moving seat, 11 is a return spring, 12 is a bulge, 13 is a guide groove, 14 is a through hole, 15 is a piston body, 16 is a counter bore, 17 is a transition hole, 18 is a blood guide groove, and 19 is a hollow push rod.

A blood taking needle comprises a head needle 1 and a tail needle 2, and is characterized in that: the head needle 1 is communicated with a first blood guide tube 3, the first blood guide tube 3 is communicated with a blocker, the blocker is communicated with a second blood guide tube 4, the second blood guide tube 4 is communicated with a tail needle 2, the blocker comprises a valve body 5, a push cap 6 and a dustproof cap 7, the push cap 6 and the dustproof cap 7 can be connected to the valve body 5 in a threaded mode, the top of the dustproof cap 7 is connected with the valve body 5 through an elastic piece, the valve body 5 is communicated with the first blood guide tube 3, a first blood cavity 8 and a second blood cavity 9 are arranged inside the valve body 5, the diameter of the first blood cavity 8 is larger than that of the second blood cavity 9, the first blood cavity 8 and the second blood cavity 9 are coaxial with the valve body 5, a moving seat 10 is arranged in the first blood cavity 8, a return spring 11 is arranged between the moving seat 10 and the bottom of the first blood cavity 8, a protrusion 12 is arranged on the moving seat 10 between the side wall of the moving seat 10 and the side wall contact surface of the first blood cavity 8, a guide groove 13 is arranged on the side wall of the first blood cavity 8 corresponding to, the bulge 12 is arranged in the guide groove 13, through holes 14 are uniformly distributed on the movable seat 10 around the axis, the center of the top end of the movable seat 10 is connected with a piston body 15, the piston body 15 can move up and down in the second blood cavity 9, the end part of the piston body 15 is provided with a counter bore 16, the side wall of the piston body 15 close to the end part is provided with a transition hole 17, the transition hole 17 is communicated with the counter bore 16, the side wall of the lower part of the second blood cavity 9 at the position corresponding to the transition hole 17 is uniformly provided with a blood guide groove 18, the blood guide groove 18 is communicated with the first blood cavity 8, the end part of the piston body 15 is arranged at the upper part of the second blood cavity 9 under the action of the return spring 11, the transition hole 17 is not communicated with the blood guide groove 18, when the piston body 15 is forced, the end part of the piston body 15 moves to the lower part of the second blood cavity 9, the transition hole 17 is communicated with the blood guide groove 18, the middle part of the, a hollow push rod 19 is placed in the second blood chamber 9 and is capable of pushing the piston body 15, the hollow push rod 19 being in communication with the counter bore 16.

The first needle 1 is an indwelling needle.

The moving seat 10, the boss 12 and the piston body 15 are integrally formed.

The hollow push rod 19 is integrally formed with the push cap 6.

When the same patient needs to take blood at intervals for multiple times, the first needle 1 is inserted into the arm or other parts of the patient, the tail needle 2 is inserted into the vacuum blood taking test tube, the dustproof cap 7 is opened, and then the tail needle 2 is connected to the valve body 5 through the pushing cap 6, so that blood can be taken; after blood sampling is finished, the push cap 6 is separated from the valve body 5, and finally the valve body 5 is covered with the dustproof cap 7 to wait for next blood sampling; when blood is collected again, similarly, another tail needle 2 is inserted into another vacuum blood collection test tube, the dustproof cap 7 is opened, and then another tail needle 2 is connected to the valve body 5 through the pushing cap 6, so that blood collection can be realized; after blood sampling is finished, the pushing cap 6 is separated from the valve body 5 in the same way, and finally the valve body 5 is covered with the dustproof cap 7 to wait for next blood sampling; after the blood sampling is finished at intervals, the first needle is pulled out, the needle hole is lightly pressed for 3-5 minutes by a cotton swab, and then no condition is observed.

The principle of the invention is as follows: when the valve body 5 does not work, the piston body 15 in the valve body 5 is clamped on the upper part of the second blood cavity 9 in a sealing way under the action of the return spring 11 under the state of not receiving external force, so that blood is blocked; during operation, the central push rod 19 is arranged at the upper part of the second blood cavity 9, so as to push the piston body 15 to be arranged at the lower part of the second blood cavity 9, and after the piston body 15 is arranged at the lower part of the second blood cavity 9, the counter bore 16 is communicated with the blood guide groove 18 through the transition hole 17, so that the first blood cavity 8, the blood guide groove 18, the counter bore 16 and the hollow push rod 19 are sequentially communicated, and the purpose of blood collection is realized.

The present invention is not described in detail in the prior art.

Claims

1. A blood taking needle comprises a head needle (1) and a tail needle (2), and is characterized in that: the first needle (1) is communicated with the first blood guide tube (3), the first blood guide tube (3) is communicated with the blocker, the blocker is communicated with the second blood guide tube (4), the second blood guide tube (4) is communicated with the tail needle (2), the blocker comprises a valve body (5), a push cap (6) and a dust cap (7), the push cap (6) and the dust cap (7) can be in threaded connection with the valve body (5), the top of the dust cap (7) is connected with the valve body (5) through an elastic piece, the valve body (5) is communicated with the first blood guide tube (3), a first blood cavity (8) and a second blood cavity (9) are arranged inside the valve body (5), the diameter of the first blood cavity (8) is larger than that of the second blood cavity (9), and the first blood cavity (8) and the second blood cavity (9) are coaxial with the valve body (5), a moving seat (10) is arranged in the first blood cavity (8), a return spring (11) is arranged between the moving seat (10) and the bottom of the first blood cavity (8), a bulge (12) is arranged on the moving seat (10) between the side wall of the moving seat (10) and the contact surface of the side wall of the first blood cavity (8), a guide groove (13) is arranged on the side wall of the first blood cavity (8) at the position corresponding to the bulge (12), the bulge (12) is arranged in the guide groove (13), through holes (14) are uniformly distributed on the moving seat (10) around an axis, a piston body (15) is connected to the center of the top end of the moving seat (10), the piston body (15) can move up and down in the second blood cavity (9), a counter bore (16) is arranged at the end part of the piston body (15), a transition hole (17) is arranged at the position, close to the end part, of the side wall of the piston body (15), the transition hole (17) is communicated with the counter bore (16), the side wall of the lower part of the second blood cavity (9) at the corresponding position of the transition hole (17) is uniformly distributed with blood guide grooves (18), the blood guide grooves (18) are communicated with the first blood cavity (8), the end part of the piston body (15) is arranged at the upper part of the second blood cavity (9) under the action of the return spring (11), the transition hole (17) is not communicated with the blood guide grooves (18), when the piston body (15) is stressed, the end part of the piston body (15) moves to the lower part of the second blood cavity (9), the transition hole (17) is communicated with the blood guide grooves (18), the middle part of the push cap (6) is provided with a hollow push rod (19), and the hollow push rod (19) penetrates through the push cap (6) and is communicated with the second blood guide tube (4), the hollow push rod (19) is arranged in the second blood cavity (9) and can push the piston body (15), and the hollow push rod (19) is communicated with the counter bore (16).

2. A blood collection needle according to claim 1, wherein: the first needle (1) is an indwelling needle.

3. A blood collection needle according to claim 1, wherein: the movable seat (10), the protrusion (12) and the piston body (15) are integrally formed.

4. A blood collection needle according to claim 1, wherein: the hollow push rod (19) and the push cap (6) are integrally formed.