CN211432943U - A safety lancet - Google Patents

Abstract

A safety blood taking needle comprises a needle tube and a needle handle, wherein the inside of the needle handle is hollow, one end of the needle handle is connected with the needle tube, and the other end of the needle handle is provided with a pipeline connecting port for connecting with an external conveying pipe; the needle tube is sleeved with a needle cylinder, a sliding sleeve sleeved on the needle tube is further arranged in the needle cylinder, a spring sleeved on the needle tube is arranged in the sliding sleeve, one end of the needle cylinder is connected to the needle handle in a clamping mode, an opening convenient for the needle tube and the sliding sleeve to extend out is formed in the other end of the needle cylinder, an opening convenient for the needle tube to extend out is formed in one end of the sliding sleeve, a spring piece type button structure convenient to clamp on the needle cylinder is arranged at the other end of the sliding sleeve, and a fixing hole matched with the. After blood sampling is finished, the elastic sheet type button structure is pressed, the sliding sleeve slides forwards due to the elasticity of the spring, the needle tube is completely protected, the safety of clinical operators is ensured, the risk of being injured by a needle is prevented, and the operation is simple and convenient; simple structure, small product volume and low production cost.

Description

A safety lancet

technical field

The utility model relates to a blood collection needle, in particular to a safety blood collection needle.

Background technique

At present, the technique of collecting blood from a patient's body using a lancet and testing it is widely used in hospitals.

The traditional blood collection needle is generally operated for the nursing staff to pull out the protective sheath of the needle, and then perform puncture for blood collection. Due to the negative pressure in the blood collection tube, the blood automatically flows into the blood collection tube; after blood collection, the blood collection tube is pulled out, and then the puncture is pulled out. Needle end; however, traditional blood collection needles are generally handled by re-sleeping the protective sheath, but this operation is extremely inconvenient, and the protective sheath and the needle are difficult to align. In the process, it is easy to stab the nurse and cause infection. There is a great risk; and this operation is extremely inconvenient and wastes a lot of time for the nursing staff. Therefore, after collecting blood, the general nursing staff will directly discard the blood in the sharps storage box, and then send it to the waste station for processing. During this process Blood-stained needles are constantly exposed to the air, increasing the risk of contamination from blood leakage and possible contamination during waste disposal.

SUMMARY OF THE INVENTION

The technical problem to be solved by the utility model is to aim at the deficiencies of the prior art, and to provide a safety lancet that is safer for nursing staff and blood-collected personnel, reduces pain and discomfort of blood-collected personnel as much as possible, and reduces production costs at the same time.

The technical problem to be solved by the present invention is achieved through the following technical solutions. The utility model relates to a safety blood collection needle. The blood collection needle comprises a needle tube and a needle handle. The inside of the needle handle is hollow, one end of the needle handle is connected with the needle tube, and the other end of the needle handle is provided with a pipeline connection for connecting with an external conveying tube. The needle tube is sleeved with a needle tube, and the needle tube is also provided with a sliding sleeve sleeved on the needle tube. The other end of the barrel is provided with an opening for the needle tube and the sliding sleeve to extend, one end of the sliding sleeve is provided with an opening for the needle tube to extend, and the other end of the sliding sleeve is provided with a spring-type button structure that is easy to be clamped to the needle barrel. The needle cylinder is provided with a fixing hole which is matched with the shrapnel button structure.

The technical problem to be solved by the present utility model can be further achieved by the following technical solutions. For the safety blood collection needle described above, the inner cylinder wall of the needle cylinder on the opening side is also provided with a device to prevent the sliding sleeve from being ejected and withdrawing after being ejected. For the anti-retreat step, the sliding sleeve is provided with a shrapnel type anti-retreat structure matched with the anti-retreat step.

The technical problem to be solved by the present utility model can be further realized by the following technical solutions. For the above-mentioned safety blood collection needle, the inner cylinder wall of the needle cylinder is also provided with a chute which is convenient for the sliding of the spring-type button structure. Both ends of the groove are arranged on the inner side of the barrel.

The technical problem to be solved by the present utility model can be further realized by the following technical solutions. For the safety blood collection needle described above, the shrapnel type anti-return structure is a rectangular shrapnel, and one end of the rectangular shrapnel is fixedly connected with the sliding sleeve, The other end of the rectangular elastic piece extends to the outside of the sliding sleeve.

The technical problem to be solved by the present invention can be further realized by the following technical solutions. For the safety blood collection needle described above, the elastic sheet button structure is a strip-shaped elastic sheet, and one end of the strip-shaped elastic sheet is fixedly connected with the sliding sleeve , the other end of the strip-shaped elastic piece extends to the outside of the sliding sleeve, and is installed with a button that is convenient for being snapped into the fixing hole.

The technical problem to be solved by the present invention can be further achieved by the following technical solutions. For the safety blood collection needle described above, the inner cylinder wall at one end of the needle cylinder is provided with a device that is easy to be installed and clamped to the needle handle. The annular protrusion of the needle handle is provided with an annular groove matched with the annular protrusion.

The technical problem to be solved by the utility model can be further realized by the following technical solutions. For the safety blood collection needle described above, a sheath is also sleeved on the needle tube outside the sliding sleeve, and the opening of the sliding sleeve is provided with a convenient Mounting port for sheath mounting.

The technical problem to be solved by the present invention can be further achieved by the following technical solutions. For the safety blood collection needle described above, the needle handle is also fixedly connected with a handle that is easy to hold.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The shrapnel button structure is adopted. There is a handle on the outside of the needle handle, which does not change the operating habits of the nursing staff. After the blood collection is completed, just press the button lightly to pop out the sliding sleeve, which is simple and convenient;

2. Equipped with an anti-return mechanism, the sliding sleeve is firmly stuck after popping up, and will not slide again under the action of external force;

3. The structure is simple and easy to form, which greatly reduces the production cost;

4. The connection between the needle barrel and the needle handle is smooth and transitional. The front end of the needle barrel and the sliding sleeve is provided with a rounded corner, and the appearance is smooth and free of burrs; it is more comfortable when it is in contact with the skin of the blood sampler.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a kind of structure exploded view of the utility model;

FIG. 3 is a cross-sectional view of the internal structure of the utility model.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the present invention. examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-3, a safety blood collection needle, the blood collection needle includes a needle tube 6 and a needle handle 14, the needle handle 14 is hollow inside, one end of the needle handle 14 is connected with the needle tube 6, and the other end of the needle handle 14 is provided with a The pipeline connection port 9 connected by the external delivery tube; the needle tube 6 is sleeved with a syringe 1, and a sliding sleeve 4 sleeved on the needle tube 6 is also provided in the syringe sleeve 1, and the sliding sleeve 4 is provided with a sleeve 6 sleeved on the needle tube 6 On the spring 7, one end of the needle cylinder 1 is clamped on the needle handle 14, the other end of the needle cylinder 1 is provided with an opening for the needle tube 6 and the sliding sleeve 4 to extend, and one end of the sliding sleeve 4 is provided with a convenient needle tube 6 to extend. The other end of the sliding sleeve 4 is provided with a spring-type button structure 5 which is easy to be clamped to the needle cylinder 1, and the needle cylinder 1 is provided with a fixing hole 2 matched with the spring-type button structure. The sliding sleeve 4 should be long enough so that when the sliding sleeve 4 slides to the front end of the needle cylinder 1, the needle tip is completely hidden in the needle cylinder 1, that is, the sliding length of the sliding sleeve 4 in the needle cylinder 1 is greater than the length of the needle, so as to ensure After the sliding sleeve 4 slides out of the needle cylinder 1 under the elastic force of the spring 7, the needle tip is completely hidden in the sliding sleeve 4; The needle tube 6 is sleeved on the needle tube 6 in the syringe barrel 1, and is then clamped into the fixing hole 2 through the shrapnel-type button structure 5 for fixing; the spring 7 is sleeved on the needle tube 6 in the sliding sleeve 4 and is in a compressed state, and the acupuncture end of the needle tube 6 extends. The outer side of the syringe 1 and the sliding sleeve 4 is easy to perform puncture and blood collection; after use, press the shrapnel button structure 5, the sliding sleeve 4 loses its fixing effect, and slides to the outside of the syringe 1 under the rebound of the spring 7, so that the exposed The needle tube 6 on the outside is covered to avoid stabbing medical staff or other personnel.

The inner cylinder wall of the needle cylinder 1 is also provided with a chute 10 that facilitates the sliding of the elastic sheet-type button structure 5 , and both ends of the chute 10 are arranged on the inner side of the needle cylinder 1 . The two ends of the sliding groove 10 do not extend to the outside of the needle cylinder 1, so as to play a sliding orientation and limiting effect on the sliding sleeve 4, so that the sliding sleeve 4 will not come out of the needle cylinder 1; The sliding in the cylinder 1 is a translational sliding without shaking, which reduces the risk of uncontrollable movement; secondly, the length of the chute 10 should be long enough to ensure that the sliding sleeve 4 slides out of the needle cylinder 1 under the elastic force of the spring 7, The needle tip is completely concealed in the sliding sleeve 4 .

The inner cylinder wall of the needle cylinder 1 on the opening side is also provided with an anti-retraction step 13 to prevent the sliding sleeve 4 from retracting after being ejected. The anti-return step 13 can be provided with several layers, that is, a stepped groove is provided downward on the inner cylinder wall of the needle cylinder 1 on the opening side, which is used to cooperate with the spring-type anti-return structure 12 when the sliding sleeve 4 slides over the place. , to tighten the shrapnel type anti-retraction structure 12 to prevent the sliding sleeve 4 from sliding into the needle cylinder 1 again, so as to prevent re-use and achieve true one-time use; in practice, only one layer of anti-retraction steps is provided. 13. In actual operation, it can be set as needed.

The chute 10 and the anti-return step 13 are respectively arranged on both sides of the needle cylinder 1, and the spring-type button structure 5 and the spring-piece type anti-return structure 12 are respectively arranged on both sides of the sliding sleeve 4, so as to cooperate with each other respectively.

The elastic piece type anti-return structure 12 is a rectangular elastic piece with certain elasticity. Before use, the end of the rectangular elastic sheet is close to the inner wall of the needle cylinder 1, so that after sliding the sliding sleeve 4, it can be stuck into the anti-retraction step 13 to prevent the sliding sleeve 4 from retracting.

The shrapnel-type button structure 5 is a strip-shaped shrapnel with a certain elasticity. One end of the strip-shaped shrapnel is fixedly connected to the sliding sleeve 4, and the other end of the strip-shaped shrapnel extends to the outside of the sliding sleeve 4, and is installed with convenient clamping. to the button inside the fixing hole 2. Before use, the strip-shaped elastic is close to the inner wall of the needle cylinder 1 at the fixing hole 2, so that the button is pressed tightly in the fixing hole 2. After the button is manually pressed away from the fixing hole 2, the button can be oriented along the chute 10. ; In practice, the button is a square plastic block, and the fixing hole 2 is a square hole slightly larger than the square plastic block.

The inner wall of one end of the needle cylinder 1 is provided with an annular protrusion 11 for easy installation and clamping on the needle handle 14 . The needle cylinder 1 is fitted on the needle handle 14 through the annular protrusion 11 and the annular groove, and at the same time, the position of the sliding sleeve 4 and the spring 7 on the inner wall is limited.

A sheath 3 is also sheathed on the needle tube 6 outside the sliding sheath 4 , and an installation port for the installation of the sheath 3 is provided at the opening of the sliding sheath 4 . The sheath 3 is clamped on the sliding sleeve 4 through the installation port before use, and protects the needle tip of the needle tube 6 before use and during transportation.

The needle handle 14 is also fixedly connected with a handle 8 that is easy to hold, which is convenient for medical staff to hold during the puncture process.

The needle cylinder 1, the chute 10, the anti-return step 13, the fixing hole 2 and the annular protrusion 11 are integrally formed and made of elastic material; Made of elastic material; sliding sleeve 4, shrapnel-type button structure 5, shrapnel-type anti-return structure 12 are integrally formed and made of elastic material; at the same time, each part is connected with a smooth transition, the front end of the syringe 1 and the sliding sleeve 4 is provided with a rounded corner, and the appearance Smooth and burr-free; makes it more comfortable when in contact with the subject's skin.

Before blood collection, pull out the sheath 3, hold the handle 8 on the needle handle 14 to puncture the person to be blood collected, and collect blood. After the blood collection is completed, press the shrapnel button structure 5 on the sliding sleeve 4. The shrapnel button structure 5 is unlocked. Under the force of the spring 7, the sliding sleeve 4 slides forward in translation. When sliding to the end of the chute 10, the chute 10 blocks the shrapnel button structure 5, so that the sliding sleeve 4 cannot Continue to slide forward, and at the same time, the shrapnel type anti-retraction structure 12 on the sliding sleeve 4 is just stuck on the anti-returning step 13 of the needle cylinder 1, so that the sliding sleeve 4 cannot slide backward, so that the sliding sleeve 4 can no longer move backwards or backwards. Sliding before, thus preventing the lancet from being used again, making it truly one-time use.

Claims (8)

1. A safety lancet, characterized in that: the lancet comprises a needle tube and a needle handle, the inside of the needle handle is hollow, one end of the needle handle is connected with the needle tube, and the other end of the needle handle is provided with a tube for being connected with an external delivery tube Road connection port; the needle tube is sleeved with a needle tube, and the needle tube is also provided with a sliding sleeve sleeved on the needle tube, the sliding sleeve is provided with a spring sleeved on the needle tube, and one end of the needle tube is clamped on the needle handle , the other end of the syringe is provided with an opening for the extension of the needle tube and the sliding sleeve, one end of the sliding sleeve is provided with an opening for the extension of the needle tube, and the other end of the sliding sleeve is provided with a spring-type button that is easy to be clamped to the syringe. structure, the needle cylinder is provided with a fixing hole which is matched with the shrapnel button structure. 2. The safety blood collection needle according to claim 1, characterized in that: the inner cylinder wall of the needle cylinder on the opening side is also provided with an anti-retraction step for preventing the sliding sleeve from being ejected and retracted, and the sliding sleeve is provided with an anti-retraction step. Shrapnel type anti-retraction structure with step back. 3. The safety blood collection needle according to claim 1 or 2, characterized in that: the inner cylinder wall of the needle cylinder is also provided with a chute that is convenient for the sliding of the elastic button structure, and both ends of the chute are arranged on the side of the needle cylinder. inside. 4 . The safety blood collection needle according to claim 2 , wherein the shrapnel type anti-return structure is a rectangular shrapnel, one end of the rectangular shrapnel is fixedly connected to the sliding sleeve, and the other end of the rectangular shrapnel extends to the outside of the sliding sleeve. 5 . 5 . The safety blood collection needle according to claim 1 , wherein the shrapnel-type button is structured as a strip-shaped shrapnel, one end of the strip-shaped shrapnel is fixedly connected to the sliding sleeve, and the other end of the strip-shaped shrapnel faces the outside of the sliding sleeve. 6 . Extends and installs a button for easy snapping into the fixing hole. 6 . The safety blood collection needle according to claim 1 , wherein the inner cylinder wall of one end of the needle cylinder is provided with an annular protrusion which is convenient to be installed and clamped on the needle handle, and the needle handle is provided with a The annular protrusion fits into the annular groove. 7 . The safety blood collection needle according to claim 1 , wherein a sheath is also sleeved on the needle tube outside the sliding sleeve, and an installation port for the installation of the sheath is provided at the opening of the sliding sleeve. 8 . 8 . The safety blood collection needle according to claim 1 , wherein the needle handle is also fixedly connected with a handle for easy holding. 9 .

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