CN209695207U - Safety blood taking needle with automatic needle return function - Google Patents

Abstract

The utility model provides a safe blood taking needle with automatic needle return, which comprises a vein needle assembly, a hose and a test tube needle assembly, wherein the vein needle assembly comprises a needle return protective cylinder, a needle return switch shell, a vein needle sheath, a butterfly needle wing, a vein needle seat, a central hard straight tube and an automatic needle return mechanism; the automatic needle returning mechanism comprises a fixing ring, a movable ring, a spring, a press switch and an elastic sheet, and can realize the automatic needle returning function. The safety blood taking needle with automatic needle return of the utility model is disposable, simple in structure and low in manufacturing cost; convenient operation uses with the cooperation of vacuum test tube commonly used, only needs the single hand to hold the press switch of both sides after the blood sampling is accomplished, and the spring can be released by compression state, drives vein needle and vein needle file and moves to back needle protection section of thick bamboo in, realizes automatic back needle, the dead function of vein needle file and vein needle card after the back needle, reduces the risk that medical personnel's acupuncture was hindered, guarantees the security.

Description

Safety blood collection needle with automatic return needle

technical field

The utility model relates to the field of medical equipment, in particular to a safety blood collection needle with automatic needle return.

Background technique

In medical examinations, it is often necessary to collect blood from patients for examination. At present, for the sake of medical safety, blood collection needles are used only once to avoid cross-infection caused by multiple uses. However, if the needle is not protected after blood collection, there will still be a risk of stabbing medical staff. Needlestick injuries are one of the most serious occupational hazards faced by clinical medical staff. The US Centers for Disease Control and Prevention monitors and reports that at least 1 million accidental needlestick injuries occur every year, and the annual death toll of medical staff due to blood-borne diseases exceeds Tens of thousands of people. In response to the above problems, some blood collection needles use retractable needles, which can effectively reduce the risk of needlestick injuries for medical staff after blood collection is completed. Existing retractable needles generally have a manual back needle method and an automatic back needle method. The blood collection needle of the manual back needle method needs to be operated with both hands, which is inconvenient to use; the blood collection needle of the automatic back needle method has a complicated structure and high manufacturing cost. .

Utility model content

The purpose of the utility model is to provide a safety blood collection needle with automatic return needle, which has a simple structure, and the push switch can be triggered with one hand after blood collection, and the needle head of the venous needle can be retracted automatically, which can effectively reduce the risk of needle stick injury for medical staff and improve blood safety.

In order to achieve the above object, the utility model adopts the following technical solutions:

A safety blood collection needle with automatic needle return, comprising a venous needle assembly, a flexible tube and a test tube needle assembly, the flexible tube is connected between the venous needle assembly and the test tube needle assembly, and the venous needle assembly includes a return needle Protective cylinder, return needle switch housing, venous needle sheath, butterfly needle wing, venous needle, venous needle seat, central hard straight tube and automatic needle return mechanism.

The back needle protection cylinder has an opposite inner end and an outer end, the inner end is fixedly connected with the back needle switch housing, and the venous needle sheath is set on the outer end; the butterfly needle Wings are set on the back needle protection tube; the venous needle is fixed on the venous needle seat, and the venous needle is located inside the venous needle sheath; the central hard straight tube is located on the back needle protection tube One end of the central hard straight tube is fixedly connected to the venous needle holder, the other end of the central hard straight tube is connected to the flexible tube, the venous needle, the venous needle The interior of the seat, the central rigid straight pipe, and the flexible pipe communicates.

The automatic needle return mechanism includes a fixed ring, a movable ring, a spring, a push switch and a shrapnel, the fixed ring is fixed on the inner side of the outer end of the needle return protection cylinder, and the movable ring is fixed on the venous needle holder The bottom end of the spring, one end of the spring is fixed on the fixed ring, and the other end is fixed on the movable ring; There are switch holes on both sides, and the outer side of the push switch protrudes from the return needle switch housing through the switch holes; one end of the shrapnel is fixedly connected to the fixing ring, and the other end is connected to the push switch. And the end of the elastic piece connected to the fixed ring corresponds to the inner side of the spring; the elastic piece is provided with a buckle near the movable ring, and the connection between the elastic piece and the push switch is provided with a direction Recessed card slots on the inside.

Preferably, the test tube needle assembly includes a first test tube needle holder, a second test tube needle holder, a test tube needle, a test tube needle rubber cap and a test tube needle sheath, the first test tube needle holder is connected to the flexible tube, and the The second test tube needle holder is inserted into the first test tube needle holder, the test tube needle is fixed on the second test tube needle holder, the test tube needle rubber cap is set on the test tube needle, the The connection between the second test tube needle seat and the test tube needle is provided with an external thread section, the test tube needle sheath is set on the external thread section of the second test tube needle seat, and the test tube needle and the test tube The needle rubber cap is inside the test tube needle sheath.

Preferably, the first test tube needle holder and the second test tube needle holder are of split structure.

Preferably, the butterfly needle wing includes a cylindrical central part and side wing parts on both sides, and a U-shaped groove is opened on the central part.

Preferably, anti-slip protrusions are provided on the surface of the side wings.

Preferably, the outer end of the return needle protection cylinder is provided with a needle wing installation groove, and the structure of the needle wing installation groove matches the structure of the central part; a U-shaped block, the structure of the U-shaped block matches the structure of the U-shaped groove.

Preferably, the venous needle sheath is cylindrical, and the inside of the venous needle sheath is provided with a plurality of arc-shaped convex surfaces, and the convex direction of the plurality of arc-shaped convex surfaces faces the venous needle Center of the sheath.

Preferably, the length of the back needle protection cylinder is greater than the total length of the venous needle and the venous needle holder.

Preferably, the inner diameter of the central rigid straight tube is equal to the inner diameter of the hose

Compared with the prior art, the utility model provides a safety blood collection needle with automatic needle return, which is used in conjunction with vacuum blood collection tubes, is easy to operate, can effectively reduce the risk of needle stick injury for medical staff, and ensure the safety of blood collection; There is an automatic needle return mechanism in the needle assembly. The automatic needle return mechanism includes a fixed ring, a movable ring, a spring, a push switch and a shrapnel. In the initial state, the spring is in a compressed state, and the buckle on the shrapnel acts as a limit to the movable ring and the spring. Position function, the outside of the push switch extends out of the needle switch housing through the switch hole; after blood collection, pinch the push switch on both sides, the shrapnel will stick to the central hard straight tube under the action of force, and the buckle will enter the inside of the spring. No longer has the function of limiting, the spring is released from the compressed state and stretches, driving the movable ring to move, thereby driving the venous needle holder and the venous needle to move to the inside of the return needle protection tube, and the movable ring will be stuck in the card slot when it moves to the card slot In this way, the function of automatically returning the needle and locking the venous needle seat and the venous needle after returning the needle is realized, and the safety is guaranteed for one-time use. The blood-taking needle of the utility model has simple structure and convenient operation, and solves the problems of inconvenient use and high cost of the existing blood-taking needles.

Description of drawings

Fig. 1 is a schematic structural diagram of a safety blood collection needle with automatic needle return in its initial state according to an embodiment of the present invention;

Fig. 2 is the enlarged schematic diagram of place A in Fig. 1;

Fig. 3 is the enlarged schematic diagram of place B in Fig. 1;

Fig. 4 is a structural schematic diagram of the initial state of the automatic needle return mechanism of a safety blood collection needle with automatic needle return according to an embodiment of the present invention;

Fig. 5 is a structural schematic diagram of a butterfly-shaped needle wing of a safety blood collection needle with automatic return needle according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of the outer end structure of the needle return protection cylinder of a safety blood collection needle with automatic needle return according to an embodiment of the present invention;

Fig. 7 is a top view of a venous needle sheath of a safety blood collection needle with automatic return needle according to an embodiment of the present invention;

Fig. 8 is a schematic structural view of the venous needle assembly of a safety blood collection needle with automatic needle retraction according to an embodiment of the present invention;

Fig. 9 is a structural schematic diagram of an automatic needle return mechanism of a safety blood collection needle with automatic needle return according to an embodiment of the present invention.

Detailed ways

In order to have a further understanding of the purpose, structure, features, and functions of the present utility model, the detailed description is as follows in conjunction with the embodiments.

Please refer to Fig. 1 to Fig. 4 in combination. Fig. 1 is a schematic diagram of the structure of a safety blood collection needle with automatic needle return in the initial state according to an embodiment of the present invention. Fig. 2 is an enlarged schematic diagram of A in Fig. 1, and Fig. 3 is Fig. 1 is an enlarged schematic view of B, and Fig. 4 is a structural schematic diagram of an automatic needle return mechanism of a safety blood collection needle with automatic needle return in an initial state according to an embodiment of the present invention. A safety blood collection needle with automatic return needle in an embodiment of the utility model includes a venous needle assembly 100, a hose 200 and a test tube needle assembly 300, and the hose 200 is connected between the venous needle assembly 100 and the test tube needle assembly 300. The new type is used in conjunction with commonly used vacuum blood collection tubes, and the venous needle assembly 100 is used for venipuncture.

The venous needle assembly 100 includes a back needle protection cylinder 11 , a back needle switch housing 12 , a venous needle sheath 13 , a butterfly needle wing 14 , a venous needle 15 , a venous needle holder 16 , a central hard straight tube 17 and an automatic needle return mechanism 18 .

The return needle protection cylinder 11 has an opposite inner end 111 and an outer end 112, the inner end 111 is fixedly connected with the return needle switch housing 12, and the venous needle sheath 13 is set on the outer end 112; the butterfly needle wing 14 is arranged on the return needle switch housing 12. On the needle protection tube 11; the venous needle 15 is fixed on the venous needle holder 16, and the venous needle 15 is located inside the venous needle sheath 13; One end of the central hard straight tube 17 is fixedly connected to the venous needle base 16, and the other end of the central hard straight tube 17 is connected to the flexible pipe 200, and the inside of the venous needle 15, the venous needle base 16, the central hard straight tube 17, and the flexible tube 200 are connected. When in use, the butterfly needle wing 14 is used to facilitate medical personnel to perform venipuncture operations.

The automatic return needle mechanism 18 includes a fixed ring 181, a movable ring 182, a spring 183, a push switch 184 and a shrapnel 185. The fixed ring 181 is fixed on the inner side of the outer end 112 of the return needle protection cylinder 11, and the movable ring 182 is fixed on the venous needle holder 16 One end of the spring 183 is fixed on the fixed ring 181, and the other end is fixed on the movable ring 182; the push switch 184 is correspondingly arranged in the return needle switch housing 12, and the two sides of the return needle switch housing 12 are provided with switches Orifice 121, the outside of the push switch 184 extends out of the return needle switch housing 12 through the switch orifice 121; one end of the shrapnel 185 is fixedly connected to the fixing ring 181, and the other end is connected to the push switch 184, and the end of the shrapnel 185 connected to the fixing ring 181 Corresponding to the inner side of the spring 183 ; the elastic piece 185 is provided with a buckle 1851 close to the movable ring 182 , and the connection between the elastic piece 185 and the push switch 184 is provided with an inwardly recessed locking groove 1852 .

Please refer to Fig. 1 to Fig. 4. In the initial state, the venous needle sheath 13 is sleeved on the outer end 112 of the return needle protection cylinder 11, the spring 183 is in a compressed state, and the buckle 1851 of the shrapnel 185 is aligned with the movable ring 182 and the spring 183 To play a position-limiting role, the outside of the push switch 184 extends out of the needle switch housing 12 through the switch opening 121; when taking blood, the venous needle sheath 13 is removed, and the venous needle assembly 100 is used for venipuncture, and the test tube needle assembly 300 Used in conjunction with vacuum blood collection tubes for blood collection operations; after blood collection is completed, remove the vacuum blood collection tubes, pinch the push switches 184 on both sides of the return needle switch housing 12, and the shrapnel 185 will stick to the central hard straight tube 17 under the action of force , the buckle 1851 enters the inside of the spring 183, and no longer has a limiting effect. The spring 183 is released from the compressed state, driving the movable ring 182 to move toward the inner end 111 of the return needle protection cylinder 11, driving the venous needle 15 and the venous needle holder 16 to The internal movement of the return needle protection cylinder 11 realizes the automatic return needle function; the size of the buckle 1851 of the automatic return needle safety blood collection needle of the utility model is set so as to ensure the limit effect on the movable ring 182 in the initial state, It can also enter the inside of the spring after triggering the push switch 184 without jamming the spring; please refer to Fig. 8 and Fig. 9 together. The structure schematic diagram of the venous needle assembly 100 after needle retraction, FIG. 9 is a schematic structure diagram of the automatic needle needle return mechanism 18 of a safety blood collection needle with automatic needle needle retraction according to an embodiment of the present invention. When the movable ring 182 moves to the draw-in groove 1852, it will be stuck in the draw-in groove 1852, thereby restricting the movement of the movable ring 182 up and down, realizing the function of locking the venous needle holder 16 and the venous needle 15, and connecting the venous needle 15 and the venous needle holder. 16 is protected inside the return needle protection tube 11 to avoid the risk of needle stick injury and ensure safety. In order to further increase safety, the venous needle sheath 13 can also be sheathed on the outer end 112 of the return needle protection cylinder 11 . The blood collection needle with automatic return needle of the utility model has simple structure and low manufacturing cost; it is easy to use, and only one hand can trigger the push switch 184 to perform automatic return needle operation; both sides are provided with push switch 184 and shrapnel 185, which automatically When returning the needle, it is necessary to pinch the push switches 184 on both sides at the same time, so as to avoid the automatic retraction of the venous needle due to misoperation during blood collection and affect the blood collection operation.

Please refer to Fig. 1, as a preferred embodiment of the present utility model, a test tube needle assembly 300 includes a first test tube needle holder 31, a second test tube needle holder 32, a test tube needle 33, a test tube needle rubber cap 34 and a test tube needle sheath 35, the second A test tube needle holder 31 is connected with the hose 200, a second test tube needle holder 32 is inserted in the first test tube needle holder 31, a test tube needle 33 is fixedly arranged on the second test tube needle holder 32, and a test tube needle rubber cap 34 is sleeved on the On the test tube needle 33, the connection between the second test tube needle seat 32 and the test tube needle 33 is provided with an external thread section 321, and the test tube needle sheath 35 is sleeved on the external thread section 321 of the second test tube needle seat 32, and the test tube needle 33 The rubber cap 34 and the test tube needle are in the inside of the test tube needle sheath 35 . Preferably, the first test tube needle holder 31 and the second test tube needle holder 32 are of split structure. The test tube needle assembly 300 is used in conjunction with commonly used vacuum blood collection tubes, and is easy to operate.

Please refer to FIG. 5 . FIG. 5 is a structural schematic diagram of a butterfly-shaped needle wing 14 of a safety blood collection needle with automatic return needle according to an embodiment of the present invention. As a preferred embodiment of the present invention, the butterfly needle wing 14 includes a cylindrical central part 141 and side wing parts 142 on both sides, and a U-shaped groove 1411 is opened on the central part 141 . Please refer to FIG. 6 . FIG. 6 is a structural schematic diagram of the outer end 112 of the needle return protection cylinder 11 of a safety blood collection needle with automatic needle return according to an embodiment of the present invention. As a preferred embodiment of the present utility model, the outer end 112 of the return needle protection cylinder 11 is provided with a needle wing installation groove 113, and the structure of the needle wing installation groove 113 matches the structure of the central part 141 of the butterfly needle wing 14; the needle wing A U-shaped block 114 is also arranged in the installation groove 113 , and the structure of the U-shaped block 114 matches the structure of the U-shaped groove 1411 . Preferably, an anti-slip protrusion 1421 is provided on the surface of the side wing portion 142, which is beneficial to the venipuncture operation.

Please refer to FIG. 7 , which is a top view of the venous needle sheath 13 of a safety blood collection needle with automatic return needle according to an embodiment of the present invention. As a preferred embodiment of the present utility model, the venous needle sheath 13 is cylindrical, and the inner side of the venous needle sheath 13 is provided with a plurality of arc-shaped convex surfaces 131, and the convex direction of the plurality of arc-shaped convex surfaces 131 faces In the center of the venous needle sheath 13, a plurality of arc-shaped convex surfaces 131 can enhance the tightness of the venous needle sheath 13 when sheathed on the outer end 112 of the needle sheath, prevent the venous needle sheath 13 from falling off, and ensure storage and Safety of use.

As a preferred embodiment of the present utility model, the length of the return needle protection tube 11 is greater than the total length of the venous needle 15 and the venous needle holder 16, so as to ensure that the venous needle holder 16 and the venous needle 15 are all protected after the automatic needle return to avoid stabbing. injured medical staff.

As a preferred embodiment of the present invention, the inner diameter of the central hard straight tube 17 is equal to the inner diameter of the flexible tube 200, which is beneficial to the blood collection operation.

The needle point of the venous needle 15 of the puncture needle of the utility model is siliconized, which can significantly reduce the pain of the patient when taking blood; the flexible tube 200 is made of soft plastic material, which is soft and elastic, and is beneficial to the blood taking operation; The needle tip of the needle 33 is siliconized and used in conjunction with a vacuum blood collection tube, which can reduce puncture resistance and help improve blood collection efficiency.

The utility model provides a safety blood collection needle with automatic needle return, which is used in conjunction with a vacuum blood collection tube, and is easy to operate, can effectively reduce the risk of needle stick injury for medical staff, and ensure the safety of blood collection; the venous needle assembly 100 is equipped with an automatic The needle return mechanism 18, after the blood collection is finished, by pinching the push switches 184 on both sides of the needle return switch housing 12, the automatic needle return mechanism 18 can automatically retract the needle head, and the venous needle holder 16 and the venous needle will be stuck after the needle return function; the safety blood collection needle with automatic needle return of the utility model is disposable, simple in structure, and low in manufacturing cost; safety.

The utility model has been described by the above-mentioned relevant embodiments, but the above-mentioned embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the utility model all belong to the patent protection scope of the utility model.

Claims (9)

1. A safety blood collection needle for automatic needle return, comprising a venous needle assembly, a flexible pipe and a test tube needle assembly, the flexible pipe being connected between the venous needle assembly and the test tube needle assembly, characterized in that: The venous needle assembly includes the return needle protection cylinder, the return needle switch housing, the venous needle sheath, the butterfly needle wing, the venous needle, the venous needle holder, the central hard straight tube and the automatic needle return mechanism; The back needle protection cylinder has an opposite inner end and an outer end, the inner end is fixedly connected with the back needle switch housing, and the venous needle sheath is set on the outer end; the butterfly needle Wings are set on the back needle protection tube; the venous needle is fixed on the venous needle seat, and the venous needle is located inside the venous needle sheath; the central hard straight tube is located on the back needle protection tube One end of the central hard straight tube is fixedly connected to the venous needle holder, the other end of the central hard straight tube is connected to the flexible tube, the venous needle, the venous needle Seat, the central hard straight pipe, the internal communication of the flexible pipe; The automatic needle return mechanism includes a fixed ring, a movable ring, a spring, a push switch and a shrapnel, the fixed ring is fixed on the inner side of the outer end of the needle return protection cylinder, and the movable ring is fixed on the venous needle holder The bottom end of the spring, one end of the spring is fixed on the fixed ring, and the other end is fixed on the movable ring; There are switch holes on both sides, and the outer side of the push switch protrudes from the return needle switch housing through the switch holes; one end of the shrapnel is fixedly connected to the fixing ring, and the other end is connected to the push switch. And the end of the elastic piece connected to the fixed ring corresponds to the inner side of the spring; the elastic piece is provided with a buckle near the movable ring, and the connection between the elastic piece and the push switch is provided with a direction Recessed card slots on the inside. 2. The safety blood collection needle with automatic return needle as claimed in claim 1, characterized in that: said test tube needle assembly comprises a first test tube needle seat, a second test tube needle seat, a test tube needle, a test tube needle rubber cap and a test tube needle protector The first test tube needle holder is connected to the hose, the second test tube needle holder is inserted into the first test tube needle holder, and the test tube needle is fixed on the second test tube needle holder , the rubber cap of the test tube needle is set on the test tube needle, the connection between the second test tube needle seat and the test tube needle is provided with an external thread section, and the test tube needle sheath is set on the second test tube needle The external thread section of the test tube needle seat, and the test tube needle and the test tube needle rubber cap are inside the test tube needle sheath. 3. The safety blood collection needle with automatic return needle according to claim 2, characterized in that: the first test tube needle holder and the second test tube needle holder are in a split structure. 4. The safety blood collection needle with automatic needle return according to claim 1, characterized in that: the butterfly-shaped needle wing includes a cylindrical central part and side wings on both sides, and a U-shaped needle is formed on the central part. groove. 5. The safety blood collection needle with automatic return needle according to claim 4, characterized in that: the surface of the side wings is provided with anti-slip protrusions. 6. The safety blood collection needle with automatic return needle as claimed in claim 4, characterized in that: the outer end of the return needle protection cylinder is provided with a needle wing installation groove, and the structure of the needle wing installation groove is the same as that of the needle wing installation groove. The structure of the central part matches; a U-shaped block is also arranged in the needle wing installation groove, and the structure of the U-shaped block matches the structure of the U-shaped groove. 7. The safety blood collection needle with automatic needle return according to claim 1, characterized in that: the venous needle sheath is cylindrical, and the inner side of the venous needle sheath is provided with a plurality of arc-shaped convex surfaces, The protruding directions of the plurality of arc-shaped convex surfaces are toward the center of the venous needle sheath. 8. The safety blood collection needle with automatic needle return according to claim 1, characterized in that: the length of the needle return protection cylinder is greater than the total length of the venous needle and the venous needle holder. 9. The safety blood collection needle with automatic return needle according to claim 1, characterized in that: the inner diameter of the central rigid straight tube is equal to the inner diameter of the flexible tube.