CN204951820U - Safety retaining needle - Google Patents

Abstract

The utility model relates to a safety indwelling needle, comprising a puncture assembly, an indwelling needle assembly and a safety device arranged between the puncture assembly and the indwelling needle assembly, the safety device includes a safety jacket and a C-shaped elastic safety clip, The safety jacket is provided with an axial channel for the puncture needle to pass through, and the upper and lower ends of the elastic safety clip are provided with through holes matching with the puncture needle, and the elastic safety clip is arranged on the safety clip. In the jacket, the upper end of the elastic safety clip elastically deforms when the puncture needle passes through the through hole, and when the puncture needle exits the through hole at the upper end of the elastic safety clip, the upper end of the elastic safety clip The through hole deviates from the axial channel under the action of the elastic deformation. The safety device of the utility model is arranged between the puncture assembly and the indwelling needle assembly and has a more compact structure and is more convenient to use.

Description

safety needle

technical field

The utility model relates to an intravenous transfusion indwelling needle assembly, in particular to a safety indwelling needle.

Background technique

The indwelling needle is an infusion device that replaces the traditional disposable infusion needle to reduce the pain of repeated puncture of the patient and the nursing workload of the medical staff, and has been widely used clinically. Its structure generally includes a puncture assembly composed of a needle hub and a puncture needle, a rubber stopper, a catheter hub, and an indwelling catheter. Wherein, the indwelling catheter is arranged at the front end of the catheter base, and the side of the catheter base is provided with puncture needle fins, and the indwelling catheter axially passes through to form a needle channel for moving the needle, and the rubber plug is fixedly arranged in the catheter base, and the puncture needle in the puncture assembly passes through the needle channel. Insert the indwelling catheter through the rubber stopper. When in use, guide the indwelling catheter through the puncture needle to puncture into the vein, then pull out the puncture assembly, and then use the indwelling catheter to continuously infuse the patient with arteriovenous liquid medicine. Since the puncture component is disposable, in order to avoid needle stabbing people during garbage disposal or recycling, resulting in secondary cross-infection, the existing intravenous infusion needles will be attached with a safety protective cover to form a safe indwelling for use The retained needle is protected. The existing safety protection sheath is usually a round tubular member whose length is longer than that of the puncture component. The inner hole is matched with the needle tube seat in a gap. Incision, near the opposite end of the safety cover, there is a lock groove composed of a nearly square window with a backstop structure, and a guide groove formed by an axial slit is provided between the lock groove and the wedge-shaped incision to ensure safety. One end of the protective sheath with a wedge-shaped incision is detachably connected to the three-way catheter base. The puncture needle fin on the needle tube base passes through the guide groove and is exposed outside the wall of the safety protection sleeve. When the puncture is completed, pinch the puncture needle fin After pulling along the guide channel to the lock groove, the puncture needle wings are blocked, so that the needle tube seat and the puncture needle are hidden in the inner cavity of the safety protection sleeve, that is, the puncture component accommodation cavity, so as to prevent the needle from stabbing people. However, this kind of safety protective cover is bulky and cumbersome to use.

Contents of the invention

The purpose of the utility model is to provide a safe indwelling needle with convenient operation and compact volume in order to overcome the deficiencies of the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: a safety indwelling needle, including a puncture assembly and an indwelling needle assembly, the puncture assembly includes a needle tube base and a puncture needle fixed on the front end of the needle tube base, and the indwelling needle assembly includes The catheter base and the indwelling catheter are characterized in that a safety jacket is provided between the puncture assembly and the indwelling needle assembly, and an axial channel for the puncture needle to pass is provided in the safety jacket, and the axial channel is At least a section of bayonet with an aperture matching the clearance of the needle tube of the puncture needle is provided. A pair of axially arranged sheet-shaped safety clips are provided on the end of the safety jacket facing the needle, and the lower ends of the pair of safety clips are respectively fixed on the safety clips. On both sides of the axial channel outlet on the end face of the sleeve, the upper end of the safety clip is a free end, and the free ends of the pair of safety clips are relatively bent and form a hook shape, one in front of the other in front of the axial channel outlet, and the puncture needle A protrusion larger than the bayonet diameter is provided on the tube wall, and the distance from the protrusion to the needle tip is smaller than the distance from the bayonet to the free end.

As a further setting of the utility model, a metal sleeve is inserted in the axial channel, and the sleeve is provided with a round tube part and a funnel part at the front end, and the opening of the funnel part faces the direction of the needle, and the round tube The inner hole at the top matches the clearance of the needle tube of the puncture needle.

As a further setting of the utility model, the safety jacket is cylindrical, the distance between the pair of safety clips matches the inner hole of the catheter holder, the inner hole at the rear end of the safety jacket matches the front end of the needle tube holder, and the safety jacket The jacket is respectively connected to the catheter hub and the needle hub through the boss at the front end and the inner hole at the rear end. The outer wall of the catheter hub is provided with a circumferential convex rib, and the front side wall of the safety jacket is provided with a rib extending toward the circumferential direction. The cantilever is extended by ribs, and the end of the cantilever is provided with a protrusion matching with the circumferential rib to form a lock.

Compared with the prior art, the safety device of the utility model is arranged between the puncture assembly and the indwelling needle assembly and has a more compact structure and is more convenient to use.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the three-dimensional structure of the appearance before use of the specific embodiment of the utility model;

Accompanying drawing 2 is a schematic cross-sectional view of the internal structure of Figure 1A-A;

Accompanying drawing 3 is the three-dimensional structural schematic diagram of appearance after use of the specific embodiment of the utility model;

Accompanying drawing 4 is the right side view after use of the specific embodiment of the utility model;

Accompanying drawing 5 is a schematic cross-sectional view of the internal structure of Fig. 4B-B;

Accompanying drawing 6 is a partial enlarged view of accompanying drawing 5I;

Accompanying drawing 7 is the front right view before using of the specific embodiment of the utility model;

Accompanying drawing 8 is a schematic cross-sectional view of the internal structure of Fig. 7C-C;

Accompanying drawing 9 is the three-dimensional structure schematic diagram of the specific embodiment of safety jacket of the present invention;

Accompanying drawing 10 is the three-dimensional structure schematic diagram of the specific embodiment of the puncture assembly of the present invention.

detailed description

As shown in Figures 1-3, the safety indwelling needle includes a puncture assembly and an indwelling needle assembly. The puncture assembly includes a needle tube base 1 and a puncture needle 2 fixed on the front end of the needle tube base 1. The indwelling needle assembly includes a catheter base 3 and an indwelling catheter. 4. A safety jacket 5 is provided between the puncture assembly and the indwelling needle assembly. As shown in FIG. The channel 501, part of the axial channel 501 may be much larger than the diameter of the puncture needle 2, but there is at least a section of bayonet with an aperture matching the gap between the needle tubes of the puncture needle 2, and the end of the safety jacket 5 facing the needle is provided with a pair of axial The set sheet safety clip 502, the lower ends of the pair of safety clips 502 are respectively fixed on both sides of the outlet of the axial channel 501 on the end face of the safety jacket 5, the upper end of the safety clip 502 is a free end, and the pair of safety clips 502 The free ends of the puncture needle 2 are relatively bent and formed into a hook shape, one in front of the other in front of the outlet of the axial passage 501, and the tube wall of the puncture needle 2 is provided with a protrusion 201 larger than the bayonet diameter, and the protrusion 201 is a distance from the needle tip. The distance is less than the distance between the bayonet and the free end.

Since the safety jacket 5 is preferably made of plastic, the diameter of the bayonet is prone to deviation. In order to facilitate production and be more accurate, in this specific embodiment, as shown in FIGS. A metal sleeve 6, the sleeve 6 is provided with a round tube part and a funnel part at the front end, the opening of the funnel part faces the direction of the needle head, the inner hole of the round tube part matches the needle tube gap of the puncture needle 2, the The round pipe part constitutes the bayonet. The safety jacket 5 is cylindrical, the distance between the pair of safety clips 502 is preferably matched with the inner hole of the catheter adapter 3, the rear end inner hole of the safety jacket 5 is matched with the front end of the needle hub 1, the safety jacket 5 is respectively connected to the catheter hub 3 and the needle hub 1 through the safety clip 502 and the inner hole at the rear end, the outer wall of the catheter hub 3 is provided with a circumferential rib 301, and the front side wall of the safety jacket 5 is provided with a Referring to the cantilever 503 extending from the circumferential rib 301 , the end of the cantilever 503 is provided with a protrusion matching the circumferential rib 301 to form a lock, as shown in FIG. 1 .

Before the safety indwelling needle is used, the safety jacket 5 is connected to the catheter hub 3 and the needle tube hub 1 respectively through a pair of safety clips 502 and the inner hole at the rear end, and the puncture needle 2 passes through the axial channel 501 of the safety jacket 5 Placed in the indwelling catheter 4 , a pair of safety clips 502 on the safety jacket 5 are located on both sides of the puncture needle 2 and elastically pressed against the two side walls of the puncture needle 2 .

After the indwelling needle for intravenous infusion is used, the puncture needle 2 is pulled back until the protrusion 201 on the tube wall of the puncture needle 2 is stuck on the bayonet in the axial passage 501, and because the protrusion 201 is far from the needle tip The distance is less than the distance between the bayonet socket and the free end. At this time, the free ends of the pair of safety clips 502 on the safety jacket 5 return to the outlet of the axial passage 501 and the puncture needle 2 under the action of elastic deformation. In the front, the needle tip will be limited in the safety jacket 5, thereby preventing cross-infection caused by the needle stabbing people, which plays a role of safety protection and is very convenient to use.

Claims (3)

1. A safety indwelling needle, comprising a puncture assembly and an indwelling needle assembly, the puncture assembly includes a needle tube base and a puncture needle fixed on the front end of the needle tube base, and the indwelling needle assembly includes a catheter base and an indwelling catheter, characterized in that: the A safety jacket is provided between the puncture assembly and the indwelling needle assembly, and an axial channel for the puncture needle to pass is provided in the safety jacket, and at least one section of the axial channel is provided with a hole whose diameter matches the gap between the puncture needle and the needle tube. Bayonet, the end of the safety jacket facing the needle is provided with a pair of axially arranged sheet-shaped safety clips, the lower ends of the pair of safety clips are respectively fixed on both sides of the axial channel outlet on the end face of the safety jacket, and the safety clips The upper end of the puncture needle is a free end, and the free ends of the pair of safety clips are relatively bent and formed into a hook shape. The distance between the protruding part and the needle tip is smaller than the distance between the bayonet socket and the free end. 2. The safety indwelling needle according to claim 1, characterized in that: a metal sleeve is inserted in the axial passage, and the sleeve is provided with a round tube portion and a funnel at the front end, the funnel The opening of the part faces the direction of the needle, and the inner hole of the circular tube part matches the gap between the needle tube of the puncture needle. 3. The safety indwelling needle according to claim 2, characterized in that: the safety jacket is cylindrical, the distance between the pair of safety clips matches the inner hole of the catheter adapter, and the inner hole at the rear end of the safety jacket Matching with the front end of the needle tube base, the safety jacket is respectively connected with the catheter base and the needle tube base through the front boss and the rear end inner hole, the outer wall of the catheter base is provided with circumferential ribs, and the front side wall of the safety jacket is A cantilever extending toward the circumferential rib is provided, and the end of the cantilever is provided with a protrusion matched with the circumferential rib to form a lock.