An automatic protection injection safety needle assembly for an insulin injector

Abstract

The utility model provides an automatic protection injection safety needle head assembly for insulin injector, including needle head, needle head end fixedly installed have needle seat assembly, needle seat assembly outside thread has the cladding cylinder, the cladding cylinder is equipped with in needle head outside, the through -hole is passed through and is set in the cladding cylinder center, the through -hole is used for needle head to wear, needle seat assembly outside is provided with the blocking stop piece. The utility model has the advantages of simple structure, prevent to stab the user, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of syringes, and in particular to a needle assembly for insulin syringes that automatically protects injection safety. Background Technology

[0002] Insulin injectors with automatic safety needle assembly are devices used for injecting insulin. Some insulin injectors with automatic safety needle assembly are designed in a pen shape and have replaceable insulin tubing, making it convenient for diabetic patients to inject insulin in their daily lives. Because insulin needles have a good puncture effect, they are usually covered by a pen cap. If the needle is not aligned properly when inserting or removing the pen cap, it is easy to prick the hand.

[0003] Chinese patent application date: April 4, 2023, publication number: CN220385555U discloses an insulin needle, including an insulin needle and a sleeve. The sleeve is fitted onto an anti-slip texture on the insulin needle, and a connecting part is provided between the sleeve and the anti-slip texture on the insulin needle. The outer wall of the sleeve is provided with a retractable sliding part. The connecting part allows the sleeve to be easily installed on the insulin needle, thereby covering the insulin needle and preventing the needle from being exposed. The sliding part allows it to extend and retract on the sleeve, so that the insulin needle is always hidden during insulin injection. During insulin injection, the sliding part contacts the patient's skin. By pushing the insulin pen, the insulin needle is driven to pierce the patient's skin through the penetration hole for injection. An elastic element allows the insulin pen to spring back when it is withdrawn, covering the insulin needle and preventing needlestick injuries, greatly increasing the safety during use.

[0004] In this technical solution, although the elasticity of the elastic element allows the sliding sleeve to cover the outside of the needle, the needle can easily pass through the through hole when the sliding sleeve is accidentally squeezed, which is not safe enough and can still easily injure the user. Therefore, further improvements can be made. Summary of the Invention

[0005] To address the problems existing in the background art, this utility model proposes an automatic needle assembly for protecting injection safety in an insulin injector.

[0006] An automatic safety protection needle assembly for an insulin injector includes a needle, a needle hub assembly fixedly mounted at the end of the needle, a covering sleeve threadedly connected to the outside of the needle hub assembly, the covering sleeve being sleeved on the outside of the needle, a through hole being formed through the center of the covering sleeve for the needle to pass through, and a blocking and limiting member being provided on the outside of the needle hub assembly.

[0007] Based on the above, the needle hub assembly includes a cylindrical seat sleeved on the end of the insulin tube, with two spiral grooves arrayed on the outer wall of the left half of the cylindrical seat; two extended arc plates are arrayed and fixed at the right end of the covering tube, and a slider is fixedly installed on the opposite side of each of the two extended arc plates, with the slider slidably connected in the spiral groove.

[0008] Based on the above, the outer wall of the right half of the cylindrical seat has two straight grooves arranged in an array, and the spiral groove corresponds one-to-one with the straight groove. The right end of the spiral groove is connected to the left side of the straight groove. The blocking and limiting component includes a sliding ring sleeved on the outside of the covering cylinder. The inner wall of the right end of the sliding ring has two slide bars fixed in an array. The slide bars are slidably connected in the straight groove. A spring is fixedly installed on the right end of the slide bar. The right end of the spring is fixedly installed on the inner wall of the right end of the straight groove.

[0009] Based on the above, a fixing ring is fixedly installed at the right end of the needle seat assembly, and a collar extending to the left is fixedly installed on the circumferential surface of the fixing ring, the collar being sleeved on the outside of the sliding ring.

[0010] Based on the above, a film is pasted on the inner wall of the left end of the covering cylinder.

[0011] Based on the above, a protruding ring is fixedly installed on the left edge of the covering cylinder.

[0012] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model uses the elasticity of the spring to position the slider at the left end of the straight groove, preventing the slider ball from sliding directly from the spiral groove into the straight groove. This prevents the coating tube from being accidentally squeezed before injection, thus preventing the needle from passing through the through hole. This achieves a safer use and prevents the user from being pricked. It has the advantages of simple structure, preventing user injury, and convenient use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention after removing the pen-shaped shell and insulin tube.

[0015] Figure 3 This is a three-dimensional exploded structural diagram of the present invention from the right-side view.

[0016] Figure 4 This is a three-dimensional exploded structural diagram of the present invention from the left-side view.

[0017] Figure 5 This is a three-dimensional structural diagram of the needle seat assembly and the covering cylinder of this utility model.

[0018] Explanation of reference numerals in the attached drawings: 100, pen-shaped shell; 200, insulin tubing; 300, needle hub assembly; 400, needle tip; 500, covering tube; 600, through hole; 700, blocking and limiting component; 301. Cylindrical seat; 302. Spiral groove; 303. Straight groove; 304. Retaining ring; 305. Collar; 501. Extended arc plate; 502. Sliding ball; 503. Coating; 504. Convex ring; 701, Sliding ring; 702, Sliding bar; 703, Spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1-5 As shown, an automatic safety needle assembly for an insulin injector includes a pen-shaped shell 100, within which an insulin tube 200 is disposed. A needle hub assembly 300 is fitted onto the end of the insulin tube 200, and the needle hub assembly 300 is connected to the left end of the insulin tube 200 via a plug-in connection. A needle 400 is fixedly mounted at the center of the needle hub assembly 300, and a covering sleeve 500 is threadedly connected to the outside of the needle hub assembly 300. The covering sleeve 500 covers the outside of the needle 400, thereby preventing the needle 400 from pricking the user. A through hole 600 is formed through the center of the covering sleeve 500 for the needle 400 to pass through. A blocking and limiting member 700 is provided on the outside of the needle hub assembly 300 to limit the movement of the covering sleeve 500 along the axial direction.

[0021] In use, the needle hub assembly 300 includes a cylindrical seat 301 fitted onto the end of the insulin tubing 200. Two spiral grooves 302 are arrayed on the outer wall of the left half of the cylindrical seat 301. Two extended arc plates 501 are arrayed and fixed to the right end of the covering cylinder 500. A slider 502 is fixedly installed on each opposite side of the two extended arc plates 501, and the slider 502 is slidably connected within the spiral grooves 302. By rotating the covering cylinder 500, the slider 502 slides within the spiral grooves 302, causing the covering cylinder 500 to rotate and move to the right. When the slider 502 slides to the right end of the spiral groove 302, the covering cylinder 500 remains in the state of covering the needle 400. A film 503 is adhered to the inner wall of the left end of the covering cylinder 500, thereby sealing the through-hole 600 and preventing contamination of the needle 400 before injection. A raised ring 504 is fixedly installed on the left edge of the coating tube 500. During injection, the raised ring 504 first contacts the patient's skin to prevent the left end of the coating tube 500 from contacting the patient's skin over a large area, that is, to prevent the coating tube 500 from contacting the skin where the needle 400 is inserted.

[0022] Specifically, the outer wall of the right half of the cylindrical seat 301 has two straight grooves 303 arranged in an array, and the spiral grooves 302 correspond one-to-one with the straight grooves 303. The right end of the spiral grooves 302 is connected to the left side of the straight grooves 303. The blocking and limiting member 700 includes a sliding ring 701 sleeved on the outside of the covering cylinder 500. The inner diameter of the sliding ring 701 is equal to the outer diameter of the covering cylinder 500. Two slide bars 702 are fixed in an array on the inner wall of the right end of the sliding ring 701. The slide bars 702 are slidably connected in the straight grooves 303. A spring 703 is fixedly installed on the right end of the slide bar 702. The right end of the spring 703 is fixedly installed on the inner wall of the right end of the straight groove 303. The elasticity of the spring 703 causes the slider 702 to tend to move to the left. When the covering cylinder 500 is screwed on, and the slider 502 slides to the right end of the spiral groove 302, the slider 702 is at the left end of the straight groove 303, which can block the slider 502 and prevent it from directly entering the straight groove 303. This prevents the covering cylinder 500 from being accidentally pressed after being screwed on, causing the needle 400 to pass through the through hole 600.

[0023] During injection, the raised ring 504 can be pressed against the skin, the sliding ring 701 can be pulled slightly to the right, and the covering tube 500 can be rotated slightly to allow the ball 502 to slide into the left end of the straight groove 303. Under the elastic action of the spring 703, the slider 702 squeezes the ball 502 to the left, keeping the ball 502 in the left end of the straight groove 303. Then, the pen-shaped shell 100 is pushed to the left, and the needle 400 can pierce the covering 503 and pass through the through hole 600, finally penetrating the skin. During this process, the ball 502 and the slider 702 slide together in the straight groove 303, and the spring 703 is compressed and contracted.

[0024] In reality, a retaining ring 304 is fixedly installed on the right end of the needle holder assembly 300. A collar 305 extending to the left is fixedly installed on the circumferential surface of the retaining ring 304, and the collar 305 is sleeved on the outside of the sliding ring 701. Thus, the collar 305 covers the outside of the spring 703, preventing the spring 703 from being exposed to the air.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A needle assembly for an insulin injector with automatic protection for injection safety, characterized in that: The device includes a needle tip, a needle seat assembly fixedly mounted at the end of the needle tip, a covering sleeve threadedly connected to the outside of the needle seat assembly, the covering sleeve being sleeved on the outside of the needle tip, a through hole being provided through the center of the covering sleeve for the needle tip to pass through, and a blocking and limiting member being provided on the outside of the needle seat assembly.

2. The needle assembly for automatic injection safety protection of an insulin injector according to claim 1, characterized in that: The needle hub assembly includes a cylindrical seat fitted onto the end of the insulin tube, and two spiral grooves are arrayed on the outer wall of the left half of the cylindrical seat. Two extended arc plates are fixedly arranged on the right end of the covering cylinder, and a sliding ball is fixedly installed on the opposite side of each of the two extended arc plates. The sliding ball is slidably connected in the spiral groove.

3. The needle assembly for automatic injection safety protection of an insulin injector according to claim 2, characterized in that: The outer wall of the right half of the cylindrical seat has two straight grooves arranged in an array. The spiral groove corresponds one-to-one with the straight groove, and the right end of the spiral groove is connected to the left side of the straight groove. The blocking and limiting component includes a sliding ring sleeved on the outside of the covering cylinder. Two slide bars are fixedly arranged on the inner wall of the right end of the sliding ring. The slide bars are slidably connected in a straight groove. A spring is fixedly installed on the right end of the slide bar. The right end of the spring is fixedly installed on the inner wall of the right end of the straight groove.

4. The needle assembly for automatic injection safety protection of an insulin injector according to claim 3, characterized in that: A fixing ring is fixedly installed at the right end of the needle seat assembly, and a collar extending to the left is fixedly installed on the circumferential surface of the fixing ring, the collar being sleeved on the outside of the sliding ring.

5. The needle assembly for automatic injection safety protection of an insulin injector according to claim 1, characterized in that: The inner wall of the left end of the covering cylinder is covered with a film.

6. The needle assembly for automatic injection safety protection of an insulin injector according to claim 1, characterized in that: A raised ring is fixedly installed on the left edge of the covering cylinder.

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