Blood taking needle with puncture-proof structure

Abstract

The utility model relates to a blood taking needle with a puncture-proof structure, which comprises a sleeve, a needle wing is mounted on the outer surface of the sleeve, a needle tube is inserted into the sleeve, and one end, far away from a needle head, of the needle tube is connected with a hose; a limiting groove is formed in the side face, close to the hose, of the sleeve, a limiting block is arranged on the outer surface of the needle tube and matched with the limiting groove, a screw hole is formed in the upper surface of the limiting block, a threaded knob is installed on the outer surface of the sleeve, and the end of the threaded knob is matched with the screw hole. A protruding block is installed on the outer surface, between the sleeve and the hose, of the needle tube, and the outer surface of the needle wing is connected with a limiting rope. The needle tube can be driven to be pulled out of the body of a patient by pulling the protruding block, the needle tube moves in the sleeve, and due to the limiting effect of the limiting rope, when the protruding block is pulled to drive the limiting rope to be straightened, one end of a needle head of the needle tube is rightly arranged in the sleeve, the needle head of the needle tube can be hidden, so that the protection effect is achieved, and stabbing accidents are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical auxiliary instruments, in particular to a blood collection needle with an anti-puncture structure. Background Art

[0002] A lancet is a medical device used to collect blood samples in a medical setting. It usually consists of a sharp needle and a hose connected to a blood collection tube or blood collection device. When collecting blood, medical staff usually select a suitable blood collection point and then pierce the skin and blood vessels with a lancet to collect the blood sample into the blood collection tube. Blood collection needles are usually designed for single use to ensure the hygiene and safety of the blood collection process.

[0003] After completing blood collection and pulling out the blood collection needle, medical staff need to press the blood collection point with a cotton swab and then pull the needle out. However, since the distance between the hand pressing the cotton swab and the needle is close and the needle lacks protective measures, the needle may injure the hand after being pulled out, leading to the risk of infectious diseases. Utility Model Content

[0004] The utility model aims to provide a blood collection needle with a puncture-proof structure which can protect the needle when it is drawn out to avoid puncture accidents.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows.

[0006] A blood collection needle with a puncture-proof structure comprises a sleeve, a needle wing is installed on the outer surface of the sleeve, a needle tube is inserted inside the sleeve, and a hose is connected to the end of the needle tube away from the needle. A limiting groove is provided on the side of the sleeve close to the hose, a limiting block is provided on the outer surface of the needle tube, and the limiting block is matched with the limiting groove, a screw hole is provided on the upper surface of the limiting block, a threaded knob is installed on the outer surface of the sleeve, and the end of the threaded knob is matched with the screw hole. A convex block is installed on the outer surface of the needle tube between the sleeve and the hose, a limiting rope is connected to the outer surface of the needle wing, and the end of the limiting rope is connected to the convex block. When the limiting rope is straightened, one end of the needle of the needle tube shrinks into the sleeve.

[0007] It can be seen that by unscrewing the threaded knob from the screw hole, then pressing the sleeve and pulling the protrusion to one side, the needle tube can be driven to be pulled out from the patient's body, and the needle tube moves inside the sleeve. Due to the limiting effect of the limiting rope, when the protrusion is pulled to straighten the limiting rope, one end of the needle tube is just inside the sleeve, so the needle tube can be hidden, thereby playing a protective role and avoiding stabbing accidents.

[0008] Furthermore, a fixed tube is installed on the outer surface of the sleeve, a sliding rod is vertically installed inside the fixed tube, a sliding block is slidably installed on the outer surface of the sliding rod, a through slot is vertically opened on the side of the fixed tube facing the needle of the needle tube, the end of the sliding block extends to the outside of the fixed tube and is installed with a baffle, and the baffle is arranged on the side of the sleeve facing the needle of the needle tube.

[0009] Under normal conditions, the baffle presses on the outer surface of the needle tube. When the needle tube is pulled out of the patient's body and retracts into the cannula, since there is no needle tube to resist the baffle, and under the action of gravity of the baffle and the slider, the slider will slide downward and drive the baffle downward to block the end of the cannula, thereby preventing the needle tube from extending outward and causing a stabbing accident.

[0010] Furthermore, a spring is sleeved on the outer surface of the slide rod, and two ends of the spring are respectively in contact with the top wall of the fixed tube and the slide block.

[0011] Under the elastic force of the spring, it always applies a thrust to the slider, thereby driving the baffle to press against the outer surface of the needle tube. When the needle tube contracts into the sleeve, the combined action of the gravity of the slider, the baffle and the elastic force of the spring can drive the baffle to drop rapidly and seal the end of the sleeve. Under the combined action of the limit rope and the baffle, one end of the needle tube is always in the sleeve and cannot extend outward. When the blood collection needle is discarded after use, the safety of medical waste disposal is improved.

[0012] Furthermore, the threaded knob, the protrusion and the fixing tube are all arranged on the same side, and the angle between them and the needle wing is 90 degrees.

[0013] When the needle wing is attached to the patient's skin, the threaded knob, bump and fixed tube are all in a vertical position, making it easy to operate.

[0014] Furthermore, the outer surface of the upper end of the threaded knob is provided with anti-skid stripes, and the anti-skid stripes are arranged vertically.

[0015] By setting the anti-slip stripes, the friction with the fingers can be increased when rotating the threaded knob to avoid hand slipping.

[0016] Furthermore, the material of the limiting rope is polyester fiber.

[0017] The limit rope made of polyester fiber can have good tensile strength and can avoid breaking when straightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of the utility model;

[0019] Figure 2 This is the second schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the sleeve in the utility model.

[0021] In the figure: 100, sleeve; 101, needle wing; 102, needle tube; 103, hose; 104, limit groove; 105, limit block; 106, screw hole; 107, threaded knob; 108, protrusion; 109, limit rope; 200, fixed tube; 201, slide bar; 202, slide block; 203, through slot; 204, baffle; 300, spring. DETAILED DESCRIPTION

[0022] The utility model is described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown, a blood collection needle with a puncture-proof structure includes a sleeve 100, a needle wing 101 is installed on the outer surface of the sleeve 100, a needle tube 102 is inserted inside the sleeve 100, and a hose 103 is connected to the end of the needle tube 102 away from the needle. A limiting groove 104 is provided on the side of the sleeve 100 close to the hose 103, a limiting block 105 is provided on the outer surface of the needle tube 102, and the limiting block 105 is matched with the limiting groove 104, a screw hole 106 is provided on the upper surface of the limiting block 105, and a threaded knob 107 is installed on the outer surface of the sleeve 100, and the end of the threaded knob 107 is matched with the screw hole 106. A protrusion 108 is installed on the outer surface of the needle tube 102 located between the sleeve 100 and the hose 103, and a limiting rope 109 is connected to the outer surface of the needle wing 101. The end of the limiting rope 109 is connected to the protrusion 108. When the limiting rope 109 is straightened, one end of the needle of the needle tube 102 shrinks into the sleeve 100.

[0024] During use, the medical staff holds the needle wing 101 to pierce the needle tube 102 into the patient's skin for blood collection, and makes the needle wing 101 stick to the patient's skin. When the blood collection is completed, first press the blood collection point with a cotton swab, then press the middle finger on the wooden stick of the cotton swab, and press the index finger on the sleeve 100, and then use the other hand to push the protrusion 108 to drive the needle tube 102 to be pulled out, and the pulled out needle tube 102 shrinks into the sleeve 100. When the protrusion 108 is pulled to drive the limit rope 109 to straighten, one end of the needle head of the needle tube 102 is just inside the sleeve 100, so the needle head of the needle tube 102 can be hidden, thereby playing a protective role and avoiding stabbing accidents.

[0025] Specifically, a fixed tube 200 is installed on the outer surface of the sleeve 100, and a slide bar 201 is vertically installed inside the fixed tube 200. A slider 202 is slidably installed on the outer surface of the slider 201. A through slot 203 is vertically opened on the side of the fixed tube 200 facing the needle head of the needle tube 102. The end of the slider 202 extends to the outside of the fixed tube 200 and is installed with a baffle 204. The baffle 204 is arranged on the side of the sleeve 100 facing the needle head of the needle tube 102. In a normal state, the baffle 204 is pressed on the outer surface of the needle tube 102. When the needle tube 102 is withdrawn from the patient's body and retracted into the sleeve 100, since there is no needle tube 102 to resist the baffle 204, and under the action of gravity of the baffle 204 and the slider 202, the slider 202 will slide downward and drive the baffle 204 to move downward, thereby blocking the end of the sleeve 100, thereby preventing the needle tube 102 from extending outward and causing a stabbing accident.

[0026] Specifically, a spring 300 is sleeved on the outer surface of the slide bar 201, and the two ends of the spring 300 are respectively in contact with the top wall of the fixed tube 200 and the slide block 202. Under the elastic force of the spring 300, it always applies a thrust to the slide block 202, thereby driving the baffle 204 to press against the outer surface of the needle tube 102. When the needle tube 102 shrinks into the sleeve 100, the gravity of the slide block 202 and the baffle 204 and the elastic force of the spring 300 can drive the baffle 204 to drop rapidly and block the end of the sleeve 100. Under the joint action of the limiting rope 109 and the baffle 204, one end of the needle head of the needle tube 102 is always in the sleeve 100 and cannot extend outward. When the blood collection needle is discarded after use, the safety of medical waste disposal is improved.

[0027] Specifically, the threaded knob 107, the protrusion 108 and the fixing tube 200 are all arranged on the same side, and the angle between them and the needle wing 101 is 90 degrees. When the needle wing 101 is attached to the patient's skin, the threaded knob 107, the protrusion 108 and the fixing tube 200 are all in a vertical state, so it is convenient to operate them.

[0028] Specifically, the outer surface of the upper end of the threaded knob 107 is provided with anti-skid stripes, and the anti-skid stripes are arranged vertically. By setting the anti-skid stripes, the friction with the fingers can be increased when the threaded knob 107 is rotated to avoid hand slippage.

[0029] Specifically, the material of the limiting rope 109 is polyester fiber. The limiting rope 109 made of polyester fiber can have good tensile strength and can avoid breaking when being straightened.

[0030] The above is a detailed description of the utility model in combination with specific embodiments, and it cannot be determined that the specific implementation methods of the utility model are limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, making several equivalent substitutions or obvious modifications without departing from the concept of the utility model, and having the same performance or use, should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A blood collection needle with a puncture-proof structure, comprising a sleeve (100), characterized in that: The outer surface of the sleeve (100) is provided with a needle wing (101), the interior of the sleeve (100) is provided with a needle tube (102), and the end of the needle tube (102) away from the needle is connected to a hose (103); A limiting groove (104) is provided on one side of the sleeve (100) close to the hose (103); a limiting block (105) is provided on the outer surface of the needle tube (102), and the limiting block (105) is matched with the limiting groove (104); a screw hole (106) is provided on the upper surface of the limiting block (105); a threaded knob (107) is installed on the outer surface of the sleeve (100), and the end of the threaded knob (107) is matched with the screw hole (106); A protrusion (108) is installed on the outer surface of the needle tube (102) located between the sleeve (100) and the hose (103); the outer surface of the needle wing (101) is connected to a limiting rope (109); the end of the limiting rope (109) is connected to the protrusion (108); when the limiting rope (109) is straightened, one end of the needle of the needle tube (102) is retracted into the sleeve (100).

2. The blood collection needle with a puncture-proof structure according to claim 1, characterized in that: A fixed tube (200) is installed on the outer surface of the sleeve (100), a sliding rod (201) is vertically installed inside the fixed tube (200), a sliding block (202) is slidably installed on the outer surface of the sliding rod (201), a through slot (203) is vertically opened on the side of the fixed tube (200) facing the needle of the needle tube (102), the end of the sliding block (202) extends to the outside of the fixed tube (200) and is installed with a baffle (204), and the baffle (204) is arranged on the side of the sleeve (100) facing the needle of the needle tube (102).

3. The blood collection needle with a puncture-proof structure according to claim 2, characterized in that: A spring (300) is sleeved on the outer surface of the sliding rod (201), and two ends of the spring (300) are respectively in contact with the top wall of the fixed tube (200) and the sliding block (202).

4. The blood collection needle with a puncture-proof structure according to claim 3, characterized in that: The threaded knob (107), the protrusion (108) and the fixing tube (200) are all arranged on the same side, and the angle between them and the needle wing (101) is 90 degrees.

5. The blood collection needle with a puncture-proof structure according to claim 4, characterized in that: The outer surface of the upper end of the threaded knob (107) is provided with anti-slip stripes, and the anti-slip stripes are arranged vertically.

6. The blood collection needle with a puncture-proof structure according to claim 1, characterized in that: The material of the limiting rope (109) is polyester fiber.

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