CN111407289A - A medical lancet - Google Patents

Abstract

The invention discloses a medical blood taking needle, which comprises a needle head, a connecting pipe, a containing cavity, a connecting seat, a spring, a first liquid discharge hole and a second liquid discharge hole, wherein the right end of the containing cavity is communicated with the outside, the right end of the containing cavity is positioned in the connecting pipe, the first liquid discharge hole is communicated with the second liquid discharge hole, a plugging mechanism is arranged between the first liquid discharge hole and the second liquid discharge hole, and the connecting seat is connected with the connecting pipe through a buckling mechanism. The phenomenon of cross infection caused by the fact that the needle stabs the human body is avoided.

Description

A medical lancet

technical field

The invention relates to the technical field of medical devices, in particular to a medical blood collection needle.

Background technique

With the development of society, especially the progress of science and technology, the rapid development of social productivity has been greatly promoted; while people enjoy the abundant material life brought by social progress, they have put forward higher and higher services for the medical and health service industry. In today's fast-paced economic and social development, efficient and fast service has become the main theme of social development.

In routine medical services, the collection and testing of blood samples is a relatively common behavior; the technology of blood collection and testing is quite mature at present, but it has not reached the purpose of drawing conclusions without collecting blood from patients. Blood collection needles and blood collection tubes are used to complete the initial process of the test, so blood collection needles are currently one of the largest-selling medical device products in the world. However, when the existing blood collection is performed for patients, due to the large number of blood collections by the nursing staff, especially the elderly and physically inconvenient patients, the nursing staff need to press the needle wing while changing the blood sample tube continuously. One end is connected to the blood sample tube by a flexible tube. When changing the blood sample tube, both hands are required to operate together, and the little finger of the other hand needs to press the needle wing. Human injury accidents caused by improper blood collection needles occur millions of times every year. In clinical care, due to the high frequency of using blood collection needles, it is inevitable that the nurses themselves will be accidentally stabbed. Blood contains highly contagious and difficult to cure pathogens such as AIDS and hepatitis B, which will pose a great security threat to the safety of nursing staff.

Therefore, it is a problem worthy of research to provide a medical lancet that is convenient for exchanging blood sample tubes and has high safety.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a medical lancet that is convenient and safe to exchange for a blood sample tube.

The object of the present invention is achieved in this way:

A medical blood collection needle, comprising a needle head, a connecting tube fixedly connected with the needle head and used for connecting the blood collection tube, further comprising an accommodating cavity located in the connecting tube and the right end communicating with the outside world, a connecting seat located in the accommodating cavity and fixedly connected with the needle head, and The left side of the connection seat is fixedly connected with the left side of the accommodating cavity and the spring is sleeved on the needle, the first liquid drain hole is located on the left side of the connection seat and is fixedly connected with the outer surface of the right side of the needle, and is located in the connection A second drain hole on the right side of the seat and connected with the blood sample tube, a limit mechanism connected with the accommodating cavity and used to block the rightward movement of the connection seat, the first drain hole is connected with the second drain hole, the first drain hole is connected with the second drain hole. A blocking mechanism for blocking the outflow of blood is arranged between the liquid discharge hole and the second liquid discharge hole, and the connecting seat is connected with the connecting pipe through a snap mechanism, and the snap mechanism includes a first snap body located on the front side of the connecting seat. and a second snap body located on the rear side of the connection seat.

The first snap body includes a first accommodating groove located on the front side of the connecting seat and opening forward, a first spring fixedly connected with the rear side of the first accommodating groove, and a first spring fixedly connected with the front end of the first spring. a connecting block, a first clamping block fixedly connected to the front side of the first connecting block, a first clamping hole located on the front side of the connecting pipe and matched with the first clamping block, the first clamping hole communicates the accommodating cavity with the outside world, The size of the first connecting block is larger than the size of the first clamping hole.

The front end of the right side of the first clamping block is provided with a first inclined surface, the rear end of the right side of the first clamping hole is provided with a second inclined surface, and the first inclined surface and the second inclined surface are parallel.

The second snap body includes a second accommodating groove located on the rear side of the connecting seat and opening backward, a second spring fixedly connected with the front side of the second accommodating groove, and a second accommodating groove fixedly connected with the rear end of the second spring. Two connecting blocks, a second locking block fixedly connected to the rear side of the second connecting block, a second locking hole located on the rear side of the connecting pipe and matched with the second locking block, the second locking hole allows the accommodating cavity to communicate with the outside world , the size of the second connection block is larger than the size of the second card hole.

The rear end of the right side of the second clamping block is provided with a third inclined surface, the front end of the right side of the second clamping hole is provided with a fourth inclined surface, and the third inclined surface is parallel to the fourth inclined surface.

The left side of the accommodating cavity is provided with a first through hole for the needle to pass through, the limiting mechanism includes an annular baffle fixedly connected with the surface of the accommodating cavity, and the central axis of the annular baffle is coincident with the central axis of the accommodating cavity .

The connecting seat is made of medical rubber material.

The diameter of the first liquid discharge hole is larger than the diameter of the second liquid discharge hole.

The blocking mechanism includes a first blocking plate movably connected to the front side of the first liquid discharge hole through a first connecting mechanism, a first blocking plate located on the rear side of the first blocking plate and connected to the first liquid discharge hole through a second connecting mechanism The second blocking plate is movably connected to the front side of the The side is fixedly connected to the front side of the first liquid discharge hole through the third spring, the left side of the second blocking plate is fixedly connected to the rear side of the second liquid discharge hole through the fourth spring, and the right side of the first blocking plate is fixedly connected to the rear side of the second liquid discharge hole. The side surface is in sealing contact with the right side of the first liquid discharge hole, the right side of the second blocking plate is in sealing contact with the right side of the first liquid discharge hole, and the rear side of the first blocking plate is in sealing contact with the second blocking plate The front sides of the plates are in sealing contact, and the first blocking plate and the second blocking plate jointly block the second drain hole.

The first connecting mechanism includes a first connecting plate fixedly connected with the front side of the first blocking plate, a second connecting plate located below the first connecting plate and fixedly connected with the front side of the first drain hole, Through the first pin shaft of the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate rotate around the first pin shaft, and the second connecting mechanism includes a first connecting plate fixedly connected with the rear side of the second blocking plate. Three connecting plates, a fourth connecting plate located below the third connecting plate and fixedly connected to the rear side of the first drain hole, a second pin passing through the third connecting plate and the fourth connecting plate, the third connecting plate and the fourth connecting plate rotates around the second pin.

Positive and beneficial effects: the setting of the connecting seat and the buckle mechanism of the present invention is convenient for fixing the needle with the accommodating cavity, inserting the blood collection tube into the connecting seat of the accommodating cavity to collect blood, and it is convenient to exchange the blood sampling tube, only one hand is needed Insert the blood sample tube into the connecting seat to draw blood. After blood collection, just pull out the blood collection tube with one hand, to avoid the phenomenon of needle walking caused by inserting both hands into the blood sample tube, and reduce the labor intensity of nursing staff. The action of the mechanism and the spring retracts the needle into the accommodating cavity, so as to avoid the phenomenon of cross-infection caused by the needle stabbing, and the safety is high.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the sectional view of A-A direction;

Fig. 3 is the structural schematic diagram of the connection seat of the present invention;

Fig. 4 is the enlarged structural representation of B part;

Fig. 5 is the sectional view of C-C direction;

The figure shows: needle 1, connecting tube 2, accommodating cavity 3, connecting seat 4, spring 5, first buckle body 6, second buckle body 7, first through hole 8, limit mechanism 9, first clip Hole 10, second card hole 11, first drain hole 12, second drain hole 13, first accommodating groove 14, first spring 15, first connecting block 16, first clamping block 17, second accommodating groove 18. The second spring 19, the second connecting hole 20, the second clamping hole 21, the first blocking plate 22, the second blocking plate 23, the first connecting mechanism 24, the second connecting mechanism 25, the third spring 26, The fourth spring 27 , the first connecting plate 28 , the second connecting plate 29 , the first pin 30 , the third connecting plate 31 , the fourth connecting plate 32 , and the second pin 33 .

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Example 1

As shown in Figures 1 and 2, a medical blood collection needle includes a needle head 1, a connecting tube 2 that is fixedly connected to the needle head 1 and used to connect the blood collection tube, and also includes an accommodation cavity 3 located in the connecting tube 2 and the right end of which is communicated with the outside world , the connecting seat 4 located in the accommodating cavity 3 and fixedly connected with the needle, the spring 5 which is fixedly connected with the left side of the connecting seat 4 and the left side of the accommodating cavity 3 and sleeved on the needle 1, the spring 5 located in the connecting seat 4 The first liquid drain hole 12 on the left side and fixedly connected with the right outer surface of the needle 1, the second liquid drain hole 13 located on the right side of the connection seat 4 and connected with the blood sample tube, connected with the accommodating chamber 3 and used for Because of the limiting mechanism 9 that blocks the rightward movement of the connecting seat 4, the connecting seat 4 is made of medical rubber material, the first liquid discharge hole 12 is connected with the second liquid discharge hole 13, and the inner side of the first liquid discharge pipe 12 is connected to the inner surface of the needle 1. The outer side is pasted and fixed by medical adhesive, and a blocking mechanism to block the outflow of blood is arranged between the first liquid discharge hole 12 and the second liquid discharge hole 13. When the blood sample tube is pulled out, the blocking mechanism will block the second liquid discharge. The hole 13 is blocked to prevent the outflow of blood. When the blood sample tube is inserted into the second drain hole 13, the left end of the blood sample tube opens the blocking mechanism, so that blood enters the blood sample tube, and the connecting seat 4 is connected to the connecting tube 2 through the snap mechanism The left side of the accommodating cavity 3 is provided with a first through hole 8 through which the needle 1 passes, and the limiting mechanism 8 includes an annular baffle that is fixedly connected to the surface of the accommodating cavity 3 through medical adhesive. The central axis of the baffle is coincident with the central axis of the accommodating cavity 3. When the buckle mechanism is opened, that is, the spring 5 pushes the connecting seat 4 to move to the right, the connecting seat 4 drives the needle 1 to move to the right. When the left end of the needle 1 is located in the first When inside the through hole 8 , the right end of the connecting seat 4 is in contact with the left end of the annular baffle, preventing the connecting seat 4 from continuing to move to the right. The side surface of the connecting seat 4 is in contact with the accommodating cavity 3, and the outer side of the connecting seat 4 is coated with medical lubricating oil. When the spring 5 pushes the connecting seat 4 to move to the left, the friction between the connecting seat 4 and the accommodating cavity 3 is reduced, The buckle mechanism includes a first buckle body located on the front side of the connection seat 4 and a second buckle body located at the rear side of the connection seat. The blood sample tube is directly inserted into the second drain hole 13. After sampling, hold the connecting tube 2 with one hand, and pull out the blood sample tube with the other hand to avoid needle walking. At the same time, it reduces the workload of nursing staff. , pull out the needle from the skin, and then open the buckle mechanism to release the connection between the connecting seat 4 and the connecting tube 2, then the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, when the needle 1 The left end of the connecting seat 4 is located in the first through hole 8. At this time, the right side of the connecting seat 4 is in contact with the left side of the annular baffle 9, so as to prevent the connecting seat 4 from continuing to move to the right, so as to prevent the needle from stabbing the nursing staff or other personnel. , the risk of cross-infection is excluded, and the safety is high.

As shown in FIG. 3 , the first snap body includes a first accommodating groove 14 located on the front side of the connecting seat 4 and opening forward, a first spring 15 fixedly connected to the rear side of the first accommodating groove 14 , and The first connecting block 16 to which the front end of the first spring 15 is fixedly connected, the first clamping block 17 that is fixedly connected to the front side of the first connecting block 16 through medical adhesive, located on the front side of the connecting pipe 2 and connected to the first clamping block 17 . The first card hole 10 is matched with the block 17. The first card hole 10 connects the accommodating cavity 3 with the outside world. 15 pushes out the first clamping hole 10 and enters the outside, so that the clamping connection between the connecting seat 4 and the connecting tube 2 is not firm and affects the stability of the needle 1. The two ends of the first spring 15 are respectively connected to the rear side of the first receiving groove 14 It is fixedly connected with the rear side of the first connection hole 16 through medical adhesive. There is a second inclined plane, the first inclined plane and the second inclined plane are parallel to facilitate the rapid separation of the first blocking block 17 and the first blocking hole 10. When the left end of the needle 1 needs to be retracted into the first through hole 8, press forward The first blocking block 17, the first blocking block 17 is separated from the first blocking hole 10, the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, so that the left end of the needle 1 is located in the first in hole 8.

As shown in FIG. 3 , the second snap body includes a second accommodating groove 18 located on the rear side of the connecting base 4 and opening backward, a second spring 19 fixedly connected to the front side of the second accommodating groove 18 , and The second connecting block 20 fixedly connected to the rear end of the second spring 19, the second clamping block 21 fixedly connected to the rear side of the second connecting block 20 through medical adhesive, located on the rear side of the connecting pipe 2 and connected to the second The second clamping hole 11 matched with the clamping block 21, the two ends of the second spring 19 are respectively fixed with the front side of the second receiving groove 18 and the front side of the second connecting hole 20 through the medical adhesive, and the second clamping hole 11 The accommodating cavity 3 is communicated with the outside world, and the size of the second connecting block 20 is larger than the size of the second clamping hole 11, so as to prevent the second spring 19 from pushing the second connecting block 20 out of the second hole 11 and entering the outside, so that the connecting seat 4 is connected to the outside. The clamping connection of the connecting tube 2 is not firm, which affects the stability of the needle 1. The rear end of the right side of the second clamping block 21 is provided with a third inclined surface, and the front end of the right side of the second clamping hole 11 is provided with a fourth inclined surface. The third inclined plane is parallel to the fourth inclined plane, which facilitates the rapid separation of the second blocking block 21 from the second blocking hole 11. When the left end of the needle 1 needs to be retracted into the first through hole 8, the second blocking block 21 is pressed backward, then When the second block 21 is separated from the hole 11 , the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, so that the left end of the needle 1 is located in the first through hole 8 .

When the left end of the needle 1 needs to be retracted into the first through hole 8, the first blocking block 17 is pressed forward, the first blocking block 17 is separated from the first blocking hole 10, and the second blocking block 21 is pressed backward at the same time. , then the second blocking block 21 is separated from the clamping hole 11, then the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, so that the left end of the needle 1 is located in the first through hole 8, the operation is simple, High security.

Example 2

As shown in Figures 1 and 2, a medical blood collection needle includes a needle head 1, a connecting tube 2 that is fixedly connected to the needle head 1 and used to connect the blood collection tube, and also includes an accommodation cavity 3 located in the connecting tube 2 and the right end of which is communicated with the outside world , the connecting seat 4 located in the accommodating cavity 3 and fixedly connected with the needle, the spring 5 which is fixedly connected with the left side of the connecting seat 4 and the left side of the accommodating cavity 3 and sleeved on the needle 1, the spring 5 located in the connecting seat 4 The first liquid drain hole 12 on the left side and fixedly connected with the right outer surface of the needle 1, the second liquid drain hole 13 located on the right side of the connection seat 4 and connected with the blood sample tube, connected with the accommodating chamber 3 and used for Because of the limiting mechanism 9 that blocks the rightward movement of the connecting seat 4, the connecting seat 4 is made of medical rubber material, the first liquid discharge hole 12 is connected with the second liquid discharge hole 13, and the inner side of the first liquid discharge pipe 12 is connected to the inner surface of the needle 1. The outer side is pasted and fixed by medical adhesive, and a blocking mechanism to block the outflow of blood is arranged between the first liquid discharge hole 12 and the second liquid discharge hole 13. When the blood sample tube is pulled out, the blocking mechanism will block the second liquid discharge. The hole 13 is blocked to prevent the outflow of blood. When the blood sample tube is inserted into the second drain hole 13, the left end of the blood sample tube opens the blocking mechanism, so that blood enters the blood sample tube, and the connecting seat 4 is connected to the connecting tube 2 through the snap mechanism The left side of the accommodating cavity 3 is provided with a first through hole 8 through which the needle 1 passes, and the limiting mechanism 8 includes an annular baffle that is fixedly connected to the surface of the accommodating cavity 3 through medical adhesive. The central axis of the baffle is coincident with the central axis of the accommodating cavity 3. When the buckle mechanism is opened, that is, the spring 5 pushes the connecting seat 4 to move to the right, the connecting seat 4 drives the needle 1 to move to the right. When the left end of the needle 1 is located in the first When inside the through hole 8 , the right end of the connecting seat 4 is in contact with the left end of the annular baffle, preventing the connecting seat 4 from continuing to move to the right. The side of the connecting seat 4 is in contact with the accommodating cavity 3, and the outer side of the connecting seat 4 is coated with medical lubricating oil. When the spring 5 pushes the connecting seat 4 to move to the left, the friction force between the connecting seat 4 and the accommodating cavity 3 is reduced, The snap mechanism includes a first snap body located on the front side of the connecting seat 4 and a second snap body located on the rear side of the connecting seat. The blood sample tube is directly inserted into the second drain hole 13. After sampling, hold the connecting tube 2 with one hand, and pull out the blood sample tube with the other hand to avoid needle walking. At the same time, it reduces the workload of nursing staff. , pull out the needle from the skin, and then open the buckle mechanism to release the fixing of the connecting seat 4 and the connecting tube 2, then the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, when the needle 1 The left end of the connecting seat 4 is located in the first through hole 8. At this time, the right side of the connecting seat 4 is in contact with the left side of the annular baffle 9, so as to prevent the connecting seat 4 from continuing to move to the right, so as to avoid the needle stabbing the nursing staff or other personnel. , the risk of cross-infection is excluded, and the safety is high.

As shown in FIG. 3 , the first snap body includes a first accommodating groove 14 located on the front side of the connecting seat 4 and opening forward, a first spring 15 fixedly connected to the rear side of the first accommodating groove 14 , and The first connecting block 16 to which the front end of the first spring 15 is fixedly connected, the first clamping block 17 that is fixedly connected to the front side of the first connecting block 16 through medical adhesive, located on the front side of the connecting pipe 2 and connected to the first clamping block 17 . The first card hole 10 is matched with the block 17. The first card hole 10 connects the accommodating cavity 3 with the outside world. 15 pushes out the first clamping hole 10 and enters the outside, so that the clamping connection between the connecting seat 4 and the connecting tube 2 is not firm and affects the stability of the needle 1. The two ends of the first spring 15 are respectively connected to the rear side of the first receiving groove 14 It is fixedly connected with the rear side of the first connection hole 16 through medical adhesive. There is a second inclined plane, the first inclined plane and the second inclined plane are parallel to facilitate the rapid separation of the first blocking block 17 and the first blocking hole 10. When the left end of the needle 1 needs to be retracted into the first through hole 8, press forward The first blocking block 17, the first blocking block 17 is separated from the first blocking hole 10, the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, so that the left end of the needle 1 is located in the first in hole 8.

As shown in FIG. 3 , the second snap body includes a second accommodating groove 18 located on the rear side of the connecting base 4 and opening backward, a second spring 19 fixedly connected to the front side of the second accommodating groove 18 , and The second connecting block 20 fixedly connected to the rear end of the second spring 19, the second clamping block 21 fixedly connected to the rear side of the second connecting block 20 through medical adhesive, located on the rear side of the connecting pipe 2 and connected to the second The second clamping hole 11 matched with the clamping block 21, the two ends of the second spring 19 are respectively fixed with the front side of the second receiving groove 18 and the front side of the second connecting hole 20 through the medical adhesive, and the second clamping hole 11 The accommodating cavity 3 is communicated with the outside world, and the size of the second connecting block 20 is larger than the size of the second clamping hole 11, so as to prevent the second spring 19 from pushing the second connecting block 20 out of the second hole 11 and entering the outside, so that the connecting seat 4 is connected to the outside. The clamping connection of the connecting tube 2 is not firm, which affects the stability of the needle 1. The rear end of the right side of the second clamping block 21 is provided with a third inclined surface, and the front end of the right side of the second clamping hole 11 is provided with a fourth inclined surface. The third inclined plane is parallel to the fourth inclined plane, which facilitates the rapid separation of the second blocking block 21 from the second blocking hole 11. When the left end of the needle 1 needs to be retracted into the first through hole 8, the second blocking block 21 is pressed backward, then When the second block 21 is separated from the hole 11 , the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, so that the left end of the needle 1 is located in the first through hole 8 .

When the left end of the needle 1 needs to be retracted into the first through hole 8, the first blocking block 17 is pressed forward, the first blocking block 17 is separated from the first blocking hole 10, and the second blocking block 21 is pressed backward at the same time. , then the second blocking block 21 is separated from the clamping hole 11, then the spring 5 pushes the connecting seat 4 to move to the right, and the connecting seat 4 drives the needle 1 to move to the right, so that the left end of the needle 1 is located in the first through hole 8, the operation is simple, High security.

As shown in FIG. 4 , the diameter of the first liquid discharge hole 12 is larger than the diameter of the second liquid discharge hole 13 . The blocking mechanism includes a first blocking plate 22 movably connected to the front side of the first liquid discharge hole 12 through a first connecting mechanism 24 , a first blocking plate 22 located on the rear side of the first blocking plate 22 and connected to the first blocking plate 22 through a second connecting mechanism 25 . The second blocking plate 23 is movably connected to the front side of the first liquid discharge hole 12 . Rotating on a horizontal plane, the left side of the first blocking plate 22 is fixedly connected to the front side of the first drain hole 12 through the third spring 26 , and the left side of the second blocking plate 24 is connected to the second blocking plate 24 through the fourth spring 27 The rear side of the drain hole 13 is fixedly connected, the right side of the first blocking plate 22 is in sealing contact with the right side of the first drain hole 12, and the right side of the second blocking plate 23 is in contact with the first drain hole The right side of 12 is in sealing contact, the rear side of the first blocking plate 22 is in sealing contact with the front side of the second blocking plate 23, the right side and the rear side of the first blocking plate 22 are provided with gaskets, and the first blocking plate 22 is in sealing contact with the front side. The front side and rear side of the second blocking plate 23 are provided with sealing gaskets. The first blocking plate 22 and the second blocking plate 23 jointly block the second drain hole 13. When the blood sample tube is inserted into the second drain hole 13 When inside the blood sample tube, the left end of the blood sample tube enters the first drainage hole 12. At this time, the left end of the blood sample tube opens the first blocking plate 22 and the second blocking plate 23, and the blood in the first drainage hole 12 enters the blood sample. After the blood sampling is completed, the blood sample tube is pulled out. At this time, due to the restoring force of the third spring 26 and the fourth spring 27, the third spring 26 pushes the first blocking plate 22 to rotate, and the fourth spring 27 When the second blocking plate 23 is pushed to rotate, the first blocking plate 22 and the second blocking plate 23 jointly block the second liquid discharge hole 13 to prevent blood from flowing out.

As shown in FIG. 5 , the first connecting mechanism 24 includes a first connecting plate 28 that is fixedly connected to the front side of the first blocking plate 22 through medical adhesive, is located below the first connecting plate 28 and is connected to the first connecting plate 28 . The front side of the drain hole 12 is fixedly connected to the second connecting plate 29 by medical adhesive, the first pin 30 passing through the first connecting plate 28 and the second connecting plate 29, and the first connecting plate 28 and the second connecting plate The plate 29 rotates around the first pin shaft 30, and the second connecting mechanism 25 includes a third connecting plate 31 that is fixedly connected to the rear side of the second blocking plate 23 through medical adhesive, is located below the third connecting plate 31 and is connected to the second connecting plate 31. The rear side of the first liquid discharge hole 12 is fixedly connected to the fourth connecting plate 32 by medical adhesive, the second pin 33 passing through the third connecting plate 31 and the fourth connecting plate 32, the third connecting plate 31 and the first The four connecting plates 32 rotate around the second pin shaft 33 .

The arrangement of the connecting seat and the buckle mechanism of the present invention facilitates fixing the needle with the accommodating cavity, and inserting the blood collection tube into the connecting seat of the accommodating cavity for blood collection, and it is convenient to exchange the blood sample tube, and only one hand can insert the blood sample tube into the accommodating cavity. The blood is drawn in the connecting seat. After the blood collection is completed, the blood collection tube can be pulled out with one hand, so as to avoid the phenomenon of needle walking caused by inserting both hands into the blood sample tube, and at the same time reduce the labor intensity of the nursing staff. The function is to retract the needle into the accommodating cavity, so as to avoid the phenomenon of cross-infection caused by the needle stabbing, and the safety is high.

Claims (10)

1. The utility model provides a medical blood taking needle, includes the syringe needle, is used for connecting the connecting pipe of heparin tube with syringe needle fixed connection, its characterized in that: still including being located the connecting tube and the right-hand member with the external chamber that holds that communicates, be located hold the intracavity and with syringe needle fixed connection's connecting seat, with the left surface of connecting seat and the left surface fixed connection that holds the chamber and establish the spring on the syringe needle, be located the left surface of connecting seat and with the first drainage hole of the right side surface fixed connection of syringe needle, be located the right flank of connecting seat and with the second drainage hole of blood specimen tube coupling, with hold the chamber and be connected and be used for blockking the stop gear that the connecting seat moved to the right, first drainage hole and second drainage hole intercommunication, be equipped with the shutoff mechanism that blocks blood outflow between first drainage hole and the second drainage hole, the connecting seat passes through buckle mechanism and is connected with the connecting tube, buckle mechanism is including the first buckle body that is located the leading flank of connecting seat, the second buckle body that is located the trailing flank.

2. A medical blood lancet according to claim 1, wherein: the first buckle body comprises a first accommodating groove, a first spring, a first connecting block, a first clamping block and a first clamping hole, the first accommodating groove is located in the front side face of the connecting seat, the opening of the first accommodating groove is forward, the first spring is fixedly connected with the rear side face of the first accommodating groove, the first connecting block is fixedly connected with the front end of the first spring, the first clamping block is fixedly connected with the front side face of the first connecting block, the first clamping hole is located in the front side face of the connecting pipe and communicated with the outside, and the size of the first connecting block is larger than that of the first clamping hole.

3. A medical blood lancet according to claim 2, wherein: the front end of the right side face of the first clamping block is provided with a first inclined plane, the rear end of the right side face of the first clamping hole is provided with a second inclined plane, and the first inclined plane is parallel to the second inclined plane.

4. A medical blood lancet according to claim 1, wherein: the second buckle body comprises a second accommodating groove, a second spring, a second connecting block and a second clamping block, wherein the second accommodating groove is located on the rear side face of the connecting seat, the opening of the second accommodating groove is backward, the second spring is fixedly connected with the front side face of the second accommodating groove, the second connecting block is fixedly connected with the rear end of the second spring, the second clamping block is fixedly connected with the rear side face of the second connecting block, the second clamping hole is located on the rear side face of the connecting pipe and is matched with the second clamping block, the second clamping hole enables the accommodating cavity to be communicated with the outside, and the size of the second connecting block is larger than that.

5. A medical blood lancet according to claim 4, wherein: the rear end of the right side face of the second clamping block is provided with a third inclined plane, the front end of the right side face of the second clamping hole is provided with a fourth inclined plane, and the third inclined plane is parallel to the fourth inclined plane.

6. A medical blood lancet according to claim 1, wherein: the left side face that holds the chamber is equipped with the first through-hole that makes the syringe needle pass through, stop gear include with hold the ring baffle of the fixed surface connection in chamber, ring baffle's the central axis with hold the coincidence of the central axis in chamber.

7. A medical blood lancet according to claim 1, wherein: the connecting seat is made of medical rubber.

8. A medical blood lancet according to claim 1, wherein: the diameter of the first liquid discharging hole is larger than that of the second liquid discharging hole.

9. A medical blood lancet according to claim 8, wherein: the plugging mechanism comprises a first plugging plate movably connected with the front side surface of the first drainage hole through a first connecting mechanism, a second plugging plate positioned at the rear side of the first plugging plate and movably connected with the front side surface of the first drainage hole through a second connecting mechanism, the first plugging plate rotates in the horizontal direction around the first connecting mechanism, the second plugging plate rotates on the horizontal plane around the second connecting mechanism, the left side face of the first plugging plate is fixedly connected with the front side face of the first drainage hole through a third spring, the left side face of the second plugging plate is fixedly connected with the rear side face of the second drainage hole through a fourth spring, the right side face of the first plugging plate is in sealing contact with the right side face of the first drainage hole, the right side face of the second plugging plate is in sealing contact with the right side face of the first drainage hole, the rear side face of the first plugging plate is in sealing contact with the front side face of the second plugging plate, and the first plugging plate and the second plugging plate plug the second drainage hole together.

10. A medical blood lancet according to claim 9, wherein: the first connecting mechanism comprises a first connecting plate fixedly connected with the front side face of the first plugging plate, a second connecting plate located below the first connecting plate and fixedly connected with the front side face of the first liquid drainage hole, and a first pin shaft penetrating through the first connecting plate and the second connecting plate, the first connecting plate and the second connecting plate rotate around the first pin shaft, the second connecting mechanism comprises a third connecting plate fixedly connected with the rear side face of the second plugging plate, a fourth connecting plate located below the third connecting plate and fixedly connected with the rear side face of the first liquid drainage hole, and a second pin shaft penetrating through the third connecting plate and the fourth connecting plate, and the third connecting plate and the fourth connecting plate rotate around the second pin shaft.

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