CN217827865U - Disposable safety blood taking needle and blood taking device - Google Patents

Abstract

The utility model discloses a disposable safe blood taking needle and hemostix; comprises a holding part for holding by hand; a through hole which penetrates through the holding part; the first end of the needle handle part is connected with the hose, the second end of the needle handle part is connected with the needle head, and a channel is arranged in the needle handle part so that blood can enter the hose from the needle head; the spring is sleeved outside the needle handle part, one end of the spring is fixedly connected with the needle handle part, and the outer diameter of the spring is smaller than the aperture of the through hole; one end of the limiting piece is rotatably connected to the holding part and used for limiting the clamping of the needle handle or loosening the clamping; the needle handle is inserted into the through hole, the spring is compressed in the through hole, and the limiting piece is rotated to clamp the needle handle so that the steel needle completely extends out of the holding part; after blood sampling, the limiting part is rotated to enable the needle handle to be separated from the clamping, and the spring extends to drive the steel needle to completely enter the holding part. The blood taking needle can realize that the needle head at the lancing end directly retracts into the holding part after the blood taking is finished, thereby ensuring the safety performance of the blood taking needle.

Description

Disposable safety blood taking needle and hemostix

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a disposable safe blood taking needle and a hemostix.

Background

The steel needle of the end of the existing commonly used blood taking needle for puncturing the human body is independently protected by an independent protective sleeve, when in use, an operator removes the protective sleeve of the steel needle to take blood, and after taking blood, the needle head is pulled out of the human body to be in an exposed state. If the steel needle at the pricking end of the blood taking needle is directly discarded in an exposed state without taking a protective measure, the steel needle has the risk of pricking medical care and medical waste treatment personnel. If a patient with blood infectious diseases exists in a blood-sampled person, the worker can be stabbed due to the fact that the steel needle at the lancing end is not used for protection measures, so that infectious organisms are in risk, and the consequences are further unreasonable.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the steel needle of the existing blood taking needle is in a naked state after the blood taking is finished, which causes stabbing of medical personnel and even brings infectious biological risks. Aims to provide a disposable safe blood taking needle and blood taking device to solve the problems.

The first purpose of the utility model is to provide a disposable safety blood taking needle, which is realized by the following technical scheme: the method comprises the following steps:

a holding portion for holding by a hand;

a through hole which penetrates through the holding part;

the first end of the needle handle part is connected with the hose, the second end of the needle handle part is connected with the needle head, and a channel is arranged in the needle handle part so that blood can enter the hose from the needle head;

the spring is sleeved outside the needle handle part, one end of the spring is fixedly connected with the needle handle part, and the outer diameter of the spring is smaller than the aperture of the through hole;

one end of the limiting piece is rotatably connected to the holding part and used for limiting or loosening the clamping of the needle handle;

the needle handle is inserted into a through hole, the spring is compressed in the through hole, and the limiting piece is rotated to clamp the needle handle so that the steel needle completely extends out of the holding part; after blood collection, the limiting part is rotated to enable the needle handle to be separated from the clamping, and the spring extends to drive the steel needle to completely enter the holding part.

In an optional embodiment, the holding part is provided with a guide sliding chute, and the guide sliding chute is communicated with the through-hole;

a sliding piece is fixedly arranged on the needle handle part and can pass through the guide sliding groove;

a limiting groove is formed in the limiting piece, and the axial width of the sliding piece is smaller than that of the limiting groove;

the spring is located between the glide and the second end of the needle handle;

the handle part of the needle is inserted into the through hole and drives the sliding part to slide along the guide sliding groove, the spring is compressed, the limiting part is rotated to enable the limiting groove to clamp the sliding part, and the steel needle completely extends out of the holding part; after blood sampling, the limiting part is rotated, the sliding part is separated from the clamping, and the steel needle completely enters the holding part.

In an optional embodiment, the guide sliding groove is opened on a side wall of the holding portion, and an extending direction of the guide sliding groove is the same as an extending direction of the through-hole.

In an optional embodiment, the needle handle comprises a hose connector, a spring limiting table and a spring fixing shaft, the end of the hose connector is connected with a hose, the spring limiting table is located between the hose connector and the spring fixing shaft, one end of the spring is fixedly connected with the spring limiting table, the spring is sleeved outside the spring fixing shaft, the spring fixing shaft is fixedly connected with the steel needle, and a through channel is formed in the hose connector, the spring limiting table and the spring fixing shaft to form a communicating channel for blood to flow through.

In an optional embodiment, the sliding piece is fixedly connected with the spring limiting table; the sliding piece is of a sheet structure, and the widths of the two ends of the sliding piece are different.

In an optional embodiment, the limiting member is located on one side of the holding portion where the guiding sliding groove is located, one end of the limiting member is hinged to the holding portion, the holding portion is further provided with a limiting fixing shaft, the limiting member is further provided with a limiting fixing hole, the limiting fixing hole is matched with the limiting fixing shaft, and the limiting member is rotated to enable the limiting fixing hole to be clamped outside the limiting fixing shaft or separated from the limiting fixing shaft to release clamping.

In an optional embodiment, the limit fixing hole is provided with a gap, the size of the gap A of the limit fixing hole and the size of the middle fixing hole are both larger than the outer diameter of the limit fixing shaft, and the size of a transition section A connecting the gap A of the limit fixing hole and the middle fixing hole is smaller than the aperture of the middle fixing hole;

the holding part is also provided with a hinged mounting shaft, the limiting piece is also provided with a hinged mounting hole, and the limiting piece is hinged with the holding part through the hinged mounting shaft and the hinged mounting hole;

the hinge mounting hole is provided with a notch, the size of the notch B of the hinge mounting hole and the size of the middle mounting hole are both larger than the outer diameter of the hinge mounting shaft, and the size of a transition section B connecting the notch B of the hinge mounting hole and the middle mounting hole is smaller than the aperture of the middle mounting hole.

In an optional embodiment, the guide sliding groove is composed of a first groove and a second groove, the width of the first groove is smaller than that of the second groove, the first groove and the second groove are arranged in a staggered manner, so that an inclined section is formed at the joint of the first groove and the second groove, and the second groove is located at one end of the holding portion, which is far away from the limiting piece; the second groove is provided with a needle handle anti-falling assembly made of elastic materials and used for preventing the needle handle from moving out of the holding part after the limiting part releases the limiting of the sliding part after blood collection is finished.

In an optional embodiment, the needle handle anti-drop assembly includes a needle handle anti-drop component and a needle handle anti-rebound component, the needle handle anti-drop component and the needle handle anti-rebound component are made of an elastic material and are disposed on the same side wall of the second slot, the needle handle anti-drop component extends towards the direction of the limiting component, the needle handle anti-rebound component extends towards the direction away from the limiting component, and the distances from the end portions of the needle handle anti-drop component and the needle handle anti-rebound component to the other side of the second slot are both smaller than the thickness of the sliding component;

the needle handle anti-drop piece and the needle handle anti-rebound piece are both of a sharp hook structure and are respectively arranged at two ends of the second groove,

and a sheath detachably and fixedly matched with the steel needle is sleeved outside the steel needle.

A second object of the present invention is to provide a safe blood collector, which comprises the above-mentioned disposable safe blood collecting needle, and further comprises a connector, wherein the connector is connected with the blood collecting needle through a hose.

Compared with the prior art, the utility model the advantages and the beneficial effects are:

the utility model provides a pair of safe blood taking needle inserts the needle handle in the through-penetration hole before the blood sampling, the spring is compressed, the steel needle stretches out to the portion of gripping outside, manually stir the locating part and make the needle handle held by the card, hold the portion of gripping during the blood sampling, manually stir locating part needle handle after the blood sampling is accomplished and break away from the card and hold, the spring extension promotes the automatic resilience of needle handle portion to just can let the blood pricking end steel needle directly return to the portion of gripping in, thereby ensured the security performance of blood taking needle. The blood collector provided by the utility model can also collect blood safely.

Drawings

In order to more clearly illustrate the technical solution of the exemplary embodiments of the present invention, the drawings which are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for a person skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:

FIG. 1 is a front view of a disposable safety blood taking needle according to an embodiment of the present invention before use;

FIG. 2 is a top view of a disposable safety blood collection needle according to an embodiment of the present invention before use;

FIG. 3 is an exploded view of a disposable safety blood collection needle according to an embodiment of the present invention before assembly;

FIG. 4 is a schematic structural view of a disposable safety blood taking needle according to an embodiment of the present invention, after blood collection, when the needle is retracted into the grip portion;

FIG. 5 is a schematic structural view of a spacing and fixing hole of a disposable safety blood taking needle provided by the embodiment of the utility model;

FIG. 6 is a schematic structural view of a hinge mounting hole of a disposable safety blood taking needle according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the safety blood collector provided by the embodiment of the present invention.

Reference numbers and corresponding part names in the drawings:

10-holding part, 20-through hole, 30-needle handle part, 301-hose connector, 302-spring limiting table, 303-spring fixing shaft, 40-spring, 50-limiting part, 60-guide sliding groove, 601-first groove, 602-second groove, 70-sliding part, 80-limiting groove, 90-limiting fixing shaft, 110-limiting fixing hole, 1101-notch A, 1102-middle fixing hole, 1103-transition section A, 1201-needle handle anti-falling part, 1202-needle handle anti-rebounding part, 130-sheath, 140-connector, 150-hose, 160-steel needle, 170-hinged mounting shaft, 180-hinged mounting hole, 1801-notch B, 1802-middle mounting hole and 1803-transition section B.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those of ordinary skill in the art that: it is not necessary to employ these specific details to practice the invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.

Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, the terms "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientation 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 therefore, should not be construed as limiting the scope of the present invention.

In one embodiment, as shown in fig. 1 to 6, a single use safety lancet comprises:

the blood sampling device comprises a holding part 10, wherein the holding part 10 can be of a cuboid structure and is used for holding by hands, and when the blood sampling device is used, medical staff holds the holding part 10 by hands to take blood;

a through-hole 20 penetrating the grip portion 10 in the longitudinal direction of the grip portion 10;

a needle handle 30, the needle handle 30 having a first end and a second end, the first end being connected to the flexible tube 150, the second end being connected to the steel needle 160, the needle handle 30 having a channel formed therein to allow blood to enter the flexible tube 150 from the steel needle 160, the channel penetrating the needle handle 30 and communicating with the flexible tube 150 and the steel needle 160;

the spring 40 is sleeved outside the needle handle part 30, one end of the spring 40 is fixedly connected to the needle handle part 30, the other end of the spring 40 is movably matched with the needle handle part 30, and the outer diameter of the spring 40 is smaller than the aperture of the through hole 20; during blood collection, the needle handle 30 and the spring 40 are all arranged inside the through-channel 20, and the outer diameter of the spring 40 is smaller than that of the through-channel 20, so that the spring 40 is limited in the through-channel 20 and can be compressed or stretched along with the movement of the needle handle 30;

a stopper 50 having a first end rotatably connected to the grip 10 and a second end moving with the rotation of the first end, so as to limit or release the needle handle 30;

when the blood sampling device is used, the needle handle 30 is inserted into the through-hole 20, the spring 40 is compressed, the steel needle 160 connected to the second end of the needle handle 30 extends out of the holding part 10, the limiting part 50 is rotated to clamp the needle handle 30, the needle handle 30 is fixed, the steel needle 160 completely extends out of the holding part 10, and then medical staff takes blood; after blood collection is completed, the limiting member 50 is rotated to enable the needle handle 30 to be separated from the clamping, and because the limitation on the needle handle 30 is eliminated, the spring 40 extends to bring the steel needle 160 into the holding part 10 completely and retracts into the through-hole channel 20, at the moment, the steel needle 160 cannot be exposed outside, medical staff cannot be injured, and disease infection cannot be caused. The position of the needle shaft 30 by the position-limiting member 50 can be limited by various clamping methods, for example, the position-limiting member 50 is rotated to move the second end of the position-limiting member 50 to the end of the holding portion 10, so as to plug the needle shaft 30; or the limiting piece 50 and the needle handle 30 are respectively provided with an inserting piece and an inserting hole; the clamping and limiting and the clamping and releasing can be carried out in other modes.

Furthermore, the holding portion 10 is provided with a guiding chute 60, the guiding chute 60 is provided on a side wall of the holding portion 10 and penetrates through the side wall to communicate with the through-penetration hole 20, and the extending direction of the guiding chute 60 is the same as the extending direction of the through-penetration hole 20, i.e. the two are parallel; one end of the guide chute 60 extends to the end of the grip part 10, and the length of the guide chute 60 is smaller than the length of the through-channel 20;

a sliding piece 70 is fixedly arranged on the needle handle part 30, the sliding piece 70 can enter from one end of the guide chute 60 and move in the guide chute 60, and one end of the sliding piece 70 extends to the outside of the guide chute 60 to form a penetration to the guide chute 60; glide 70 is preferably provided as a sheet-like structure, with the width of the two ends of glide 70 being unequal, preferably the width of the end near needle shaft 30 being less than the width of the other end;

the limiting piece 50 is provided with a limiting groove 80, the limiting groove 80 is a U-shaped groove, and the axial width of the sliding piece 70 is smaller than the width of the limiting groove 80, so that the sliding piece 70 can be clamped in the limiting groove 80;

spring 40 is located between glide 70 and the second end of needle shaft 30;

when in use, the needle handle 30 is inserted into the through-channel 20, at the same time, the sliding piece 70 enters the guide chute 60 along with the movement of the needle handle 30 and slides along the guide chute 60, the spring 40 is compressed, and then the limiting piece 50 is rotated to enable the limiting groove 80 to clamp the sliding piece 70, so that the needle handle 30 is fixed, and the steel needle 160 completely extends out of the holding part; after blood collection, the stopper 50 is rotated, the stopper groove 80 moves to separate the sliding member 70 from the stopper groove 80 and further from the clamping, and the steel needle 160 is completely hidden in the grip portion 10.

Further, the needle handle 30 comprises a hose connector 301, a spring limiting table 302 and a spring fixing shaft 303, one end of the hose connector 301 is connected with the blood transfusion hose 150, and the end of the blood transfusion hose 150 is sleeved outside the hose connector 301 to form a sealing connection; the spring limiting table 302 is positioned between the hose connector 301 and the spring fixing shaft 303, the hose connector 301, the spring limiting table 302 and the spring fixing shaft 303 are fixedly connected, one end of the spring 40 is fixedly connected with the spring limiting table 302, the inner diameter of the spring limiting table 302 is larger than the outer diameter of the spring 40, the spring 40 is sleeved outside the spring fixing shaft 303, one end, far away from the spring limiting table 302, of the spring fixing shaft 303 is fixedly connected with the steel needle 160, and through channels are formed in the hose connector 301, the spring limiting table 302 and the spring fixing shaft 303 to form a communicating channel for blood to flow through; preferably, the glide 70 is fixedly attached to the spring retention stage 302.

Furthermore, the position limiting element 50 is located on one side of the holding portion 10 where the guiding sliding groove 60 is provided, one end of the position limiting element 50 is located near one end of the guiding sliding groove 60, which is closer to the second end of the needle handle 30, one end of the position limiting element 50 is hinged to the holding portion 10, the holding portion 10 is further provided with a position limiting fixing shaft 90, the position limiting fixing shaft 90 is fixedly arranged on the holding portion 10, the position limiting element 50 is further provided with a position limiting fixing hole 110, the position limiting fixing hole 110 extends to the end of the position limiting element 50 to be communicated with the outside, the position limiting fixing hole 110 is located on one side of the position limiting groove 80, and the aperture of the position limiting fixing hole 110 is smaller than the aperture of the position limiting groove 80; the limiting fixing hole 110 is matched with the limiting fixing shaft 90, and the limiting fixing hole 110 can be clamped outside the limiting fixing shaft 90 and can release clamping of the limiting fixing shaft 90; the rotation of the position-limiting member 50 can make the position-limiting fixing hole 110 be clamped outside the position-limiting fixing shaft 90 or separated from the position-limiting fixing shaft 90 to release the clamping. Therefore, the limiting groove 80 is used as a main clamping part to limit the sliding part 70 in a clamping manner, the limiting fixing hole 110 is used as an auxiliary part to limit the limiting fixing shaft 90 in a clamping manner, and the double clamping and limiting effects form a stable limiting structure, so that the needle handle part 30 is ensured to be stably fixed in the blood sampling process, and the safety of the blood sampling process is ensured.

The limit fixing hole 1102 of the limit part 50 is an omega-shaped opening, the size of the opening a 1101 of the limit fixing hole 110 and the size of the middle fixing hole 1102 are larger than the outer diameter of the limit fixing shaft 90 on the grip part 10, the size of the transition section a 1103 connecting the opening a 1101 of the limit fixing hole 110 and the middle fixing hole 1102 is smaller than the diameter of the middle fixing hole 1102, and the side opposite to the opening a 1101 is designed to be an inverted Y-shaped opening, as shown in fig. 5. Therefore, the limiting fixing hole 110 is stably matched with the limiting fixing shaft 90 to form a stable clamping limiting structure.

The holding portion 10 is further provided with a hinge mounting shaft 170, the limiting member 50 is further provided with a hinge mounting hole 180, and the limiting member 50 is hinged to the holding portion 10 through the hinge mounting shaft 170 and the hinge mounting hole 180;

the hinge mounting hole 180 has a cutout, the size of the cutout B1801 and the middle mounting hole 1802 of the hinge mounting hole are both larger than the outer diameter of the hinge mounting shaft 170, and the size of the transition section B1803 connecting the cutout B1801 and the middle mounting hole 1802 of the hinge mounting hole is smaller than the aperture of the middle mounting hole 1802. The specific structure is shown in fig. 6. This makes it possible to form a stable and reliable rotational connection structure between the grip portion 10 and the stopper 50.

As shown in fig. 1 to 5, in another embodiment, the guide chute 60 is composed of a first groove 601 and a second groove 602, the second groove 602 is located at one end of the holding portion 10 away from the limiting member 50, the second groove 602 is an opening end of the guide chute 60, the width of the first groove 601 is smaller than that of the second groove 602, the first groove 601 and the second groove 602 are arranged in a staggered manner, and the central axis of the first groove 601 is not overlapped with the central axis of the second groove 602, so that the first groove 601 and the second groove 602 form an inclined segment at the joint; the first groove 601 and the second groove 602 are arranged in a staggered manner, so that after blood collection is finished, the limiting piece 50 can relieve the limitation on the sliding piece 70, the spring 40 extends to drive the needle handle portion 30 and the sliding piece 70 to move, the moving speed of the sliding piece 70 is buffered, the moving speed of the sliding piece 70 is reduced, and the needle handle portion 30 is prevented from being rapidly separated from the holding portion 10; further, a needle handle falling-off preventing component made of an elastic material is disposed on the second groove 602 to play a certain retaining role for the sliding member 70 during the moving process, so as to prevent the needle handle 30 from falling off the holding portion 10 and bringing a new dangerous risk when the spring 40 is extended.

Furthermore, the needle handle fall-off preventing component comprises a needle handle fall-off preventing piece 1201 and a needle handle rebound preventing piece 1202 which are made of elastic materials, and can be made of elastic plastics; needle handle anti-drop piece 1201 and needle handle anti-rebound piece 1202 are fixedly arranged on the same side wall of second groove 602, needle handle anti-drop piece 1201 extends towards the direction of limiting piece 50, needle handle anti-rebound piece 1202 extends towards the direction far away from limiting piece 50, needle handle anti-drop piece 1201 can be perpendicular to needle handle anti-rebound piece 1202, and the distance between the end of needle handle anti-drop piece 1201 and needle handle anti-rebound piece 1202 and the other side wall of second groove 602 is smaller than the thickness of sliding piece 70; the needle handle anti-drop element 1201 and the needle handle anti-rebound element 1202 are both of a sharp hook structure and are respectively arranged at two ends of the second groove 602, so that the needle handle anti-drop limiting element 50 and the needle handle anti-rebound blocking element limit the sliding element 70 up and down to ensure that the needle handle 30 does not drop off and rebound from the holding part 10, thereby forming a closed protection for the used steel needle 160;

further, the outer sleeve of the steel needle 160 is provided with a sheath 130 which is detachably and fixedly matched with the steel needle; before blood sampling, the sheath 130 is fixedly sleeved outside the steel needle 160, and when blood sampling is carried out, the sheath 130 is pulled out to expose the steel needle 160 for blood sampling.

In another embodiment, as shown in fig. 7, a safety blood collector comprises the disposable safety blood collection needle of any one of the above embodiments, and further comprises a connector 140, wherein the connector 140 is communicated with the blood collection needle through a hose 150, and when blood is collected, the connector 140 is inserted into the glass sealing tube, and blood enters the glass sealing tube.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A single use safety blood collection needle, comprising:

a holding portion for holding by a hand;

a through hole which penetrates through the holding part;

the first end of the needle handle part is connected with the hose, the second end of the needle handle part is connected with the steel needle, and a channel is arranged in the needle handle part so that blood can enter the hose from the needle head;

the spring is sleeved outside the needle handle part, one end of the spring is fixedly connected with the needle handle part, and the outer diameter of the spring is smaller than the aperture of the through hole;

one end of the limiting piece is rotatably connected to the holding part and used for limiting or loosening the clamping of the needle handle;

the needle handle is inserted into the through-penetration channel, the spring is compressed inside the through-penetration channel, and the limiting piece is rotated to clamp the needle handle so that the steel needle completely extends out of the holding part; after blood collection, the limiting part is rotated to enable the needle handle to be separated from the clamping, and the spring extends to drive the steel needle to completely enter the holding part.

2. The disposable safety lancet of claim 1, wherein the grip portion is formed with a guide sliding groove, the guide sliding groove communicating with the through-hole;

a sliding piece is fixedly arranged on the needle handle part and can pass through the guide sliding groove;

a limiting groove is formed in the limiting piece, and the axial width of the sliding piece is smaller than that of the limiting groove;

the spring is located between the glide and the second end of the needle handle;

the needle handle is inserted into the through-hole and drives the sliding piece to slide along the guide sliding groove, the spring is compressed, the limiting piece is rotated to enable the limiting groove to clamp the sliding piece, and the steel needle completely extends out of the holding part; after blood sampling, the limiting part is rotated, the sliding part is separated from the clamping, and the steel needle completely enters the holding part.

3. A single-use safety lancet according to claim 2, wherein said guide slide groove is opened in a side wall of said holding part, and an extending direction of said guide slide groove is the same as an extending direction of said through-passage.

4. The disposable safety blood taking needle according to claim 2, wherein the needle handle portion comprises a hose connector, a spring limiting table and a spring fixing shaft, the end of the hose connector is connected with a hose, the spring limiting table is positioned between the hose connector and the spring fixing shaft, one end of the spring is fixedly connected with the spring limiting table, the spring sleeve is arranged outside the spring fixing shaft, the spring fixing shaft is fixedly connected with the steel needle, and the hose connector, the spring limiting table and the spring fixing shaft are internally provided with through channels to form communication channels for blood to flow through.

5. The single-use safety blood collection needle of claim 4, wherein the sliding member is fixedly connected with the spring limiting table, the sliding member is of a sheet structure, and the widths of the two ends of the sliding member are different.

6. The disposable safety blood taking needle according to claim 2, wherein the limiting member is located at one side of the holding portion where the guiding sliding groove is provided, one end of the limiting member is hinged to the holding portion, the holding portion is further provided with a limiting fixing shaft, the limiting member is further provided with a limiting fixing hole, the limiting fixing hole is matched with the limiting fixing shaft, and the limiting member is rotated to enable the limiting fixing hole to be clamped outside the limiting fixing shaft or separated from the limiting fixing shaft to release clamping.

7. The single-use safety blood taking needle as claimed in claim 6, wherein the stopper fixing hole has a notch, the size of the notch A of the stopper fixing hole and the size of the middle fixing hole are both larger than the outer diameter of the stopper fixing shaft, and the size of the transition section A connecting the notch of the stopper fixing hole and the middle fixing hole is smaller than the diameter of the middle fixing hole;

the holding part is also provided with a hinged mounting shaft, the limiting piece is also provided with a hinged mounting hole, and the limiting piece is hinged with the holding part through the hinged mounting shaft and the hinged mounting hole;

the hinge mounting hole is provided with a notch, the sizes of the notch B of the hinge mounting hole and the middle mounting hole are both larger than the outer diameter of the hinge mounting shaft, and the size of the transition section B connecting the notch B of the hinge mounting hole and the middle mounting hole is smaller than the aperture of the middle mounting hole.

8. A single use safety lancet according to claim 2, wherein the guiding sliding groove is composed of a first groove and a second groove, the width of the first groove is smaller than that of the second groove, the first groove and the second groove are arranged in a staggered manner, so that the first groove and the second groove form an inclined section at the joint, and the second groove is located at one end of the holding part far away from the limiting part; the second groove is provided with a needle handle anti-falling assembly made of elastic materials and used for preventing the needle handle from moving out of the holding part after the limiting part removes the limiting of the sliding part after the blood sampling is finished.

9. The disposable safety blood collection needle according to claim 8, wherein the needle-handle dropout prevention assembly comprises a needle-handle dropout prevention member and a needle-handle rebound prevention member made of an elastic material, the needle-handle dropout prevention member and the needle-handle rebound prevention member are disposed on the same sidewall of the second groove, the needle-handle dropout prevention member extends toward the direction of the limiting member, the needle-handle rebound prevention member extends toward the direction away from the limiting member, and the distances from the end portions of the needle-handle dropout prevention member and the needle-handle rebound prevention member to the other side of the second groove are both smaller than the thickness of the sliding member;

the needle handle anti-drop piece and the needle handle anti-rebound piece are both of a sharp hook structure and are respectively arranged at two ends of the second groove,

and a sheath detachably and fixedly matched with the steel needle is sleeved outside the steel needle.

10. A safe blood collector comprising the disposable safe blood collection needle according to any one of claims 1 to 9, further comprising a connector, wherein the connector is communicated with the blood collection needle through a hose.

Images