CN204864349U - Keep somewhere needle safely - 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 jacket and a C-shaped elastic safety clip, the The jacket is provided with an axial passage for the puncture needle to pass through, the upper end of the elastic safety clip is provided with an opening, and the wall of the puncture needle is provided with a gap, the elastic safety clip is arranged in the jacket, so The upper end of the elastic safety clip is elastically deformed when the puncture needle passes through the opening, and when the gap on the puncture needle retreats to the opening position, the puncture needle is stuck at a narrower position inside the opening and axially limited , and because the distance between the notch and the needle tip is less than the distance from the upper end of the elastic safety clip to the end of the jacket, the needle tip will be limited in the jacket, thereby preventing cross-infection caused by the needle being stabbed, thereby playing a role of safety protection and It is very convenient to use.

Description

a 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 fits in a gap with the needle tube seat. 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 gap is provided on the wall of the puncture needle, a safety device is provided between the puncture assembly and the indwelling needle assembly, and the safety device includes a jacket and an elastic safety clip, The jacket is provided with an axial passage for the puncture needle to pass through, the elastic safety clip is C-shaped, the lower end of the elastic safety clip is provided with a through hole that fits with the puncture needle, and the upper end is provided with a There is a convex-shaped opening, the outer side of the opening is wider, and the inner side of the opening is narrower, which is smaller than the diameter of the puncture needle and fits with the gap of the puncture needle. The elastic safety clip is arranged in the jacket, and the elastic safety clip has two upper and lower sides. The end is set radially in the axial channel, the upper end of the elastic safety clip is slidably arranged in the radial direction, the puncture needle passes through the axial channel and the opening at the upper end of the elastic safety clip and the through hole at the lower end, the elastic safety clip The upper end of the safety clip has an elastic force toward the side of the puncture needle, and the distance between the notch and the needle tip is smaller than the distance from the upper end of the elastic safety clip to the end of the jacket.

As a further setting of the utility model, the jacket is cylindrical, and the center is provided with an axial through hole to form the axial channel, and one side of the axial channel is provided with a C-shaped slot matching the elastic safety clip , the two ends of the C-shaped slot radially pass through the axial channel, the front end of the jacket is provided with a boss matching the inner hole of the catheter seat, the inner hole at the rear end of the jacket matches the front end of the needle tube seat, the clip The sleeve is respectively connected with the catheter base and the needle tube base through the boss at the front end and the inner hole at the rear end.

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 before the use of the specific embodiment of the utility model;

Accompanying drawing 2 is the front view before use of the specific embodiment of the utility model;

Accompanying drawing 3 is accompanying drawing 2A-A sectional view;

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

Accompanying drawing 5 is accompanying drawing 4B-B sectional view;

Accompanying drawing 6 is the three-dimensional structure schematic diagram after using of the specific embodiment of the utility model;

Accompanying drawing 7 is a partial enlarged view of accompanying drawing 6I part;

Accompanying drawing 8 is the right view of the structure of the specific embodiment of the utility model after use;

Accompanying drawing 9 is accompanying drawing 8C-C sectional view;

Accompanying drawing 10 is the three-dimensional structure schematic diagram of the specific embodiment of jacket of the present invention;

Accompanying drawing 11 is the three-dimensional structural schematic diagram of the specific embodiment of the safety clip of the present invention;

Accompanying drawing 12 is the three-dimensional structure schematic diagram of the specific embodiment of the puncture assembly of the present invention.

Detailed ways

As shown in Figures 1-3, the safety indwelling needle includes a puncture assembly, an indwelling needle assembly and a safety device, and the safety device is arranged between the puncture assembly and the 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. The indwelling catheter 4 is fixedly arranged on the front end of the catheter base 3. For convenience, the needle tube The side of the seat 1 is provided with puncture needle fins 5, which can be on one side or both sides. As shown in Figures 6 and 7, the safety device includes a jacket 6 and an elastic safety clip 7, and the jacket 6 is cylindrical as a whole, as shown in Figure 10, the jacket 6 in this specific embodiment is cylindrical, The jacket 6 is provided with an axial passage 601 through which the puncture needle 2 passes, specifically, an axial through hole is provided at the center to form the axial passage 601 . As shown in Figure 11, the elastic safety clip 7 is C-shaped, and the lower end of the elastic safety clip 7 is provided with a through hole 701 that fits with the puncture needle 2, and the upper end is provided with a convex opening 702. The outer side of 702 is wider, and the inner side of opening 702 is narrower, which is smaller than the diameter of the puncture needle 2 and fits in a gap with the notch 201 of the puncture needle 2. The elastic safety clip 7 is arranged in the jacket 6, wherein the elastic safety clip 7 The upper and lower ends are arranged radially in the axial channel 601, the upper end of the elastic safety clip 7 is slidably arranged in the radial direction, and the puncture needle 2 passes through the axial channel 601 and the opening 702 at the upper end of the elastic safety clip 7 And the lower end through hole 701, the upper end of the elastic safety clip 7 has an elastic force toward the puncture needle 2 side, and the distance between the gap and the needle tip is smaller than the distance from the upper end of the elastic safety clip 7 to the end of the jacket 6.

In this specific embodiment, as shown in Figure 11, the upper and lower ends of the elastic safety clip 7 are vertically arranged with the middle connecting part, and the material is made of good elasticity such as phosphor bronze sheet, and the axial direction of the jacket 6 is One side of the channel 601 is provided with a C-shaped slot 602 matching the elastic safety clip 7, the two ends of the C-shaped slot 602 radially pass through the axial channel 601, and the middle part is also perpendicular to the two ends, and is arranged along the axial direction. , the elastic safety clip 7 is set in the jacket 6 by being embedded in the C-shaped slot 602, the through hole 701 at the lower end of the elastic safety clip 7 is opposite to the axial channel 601, and the elastic safety clip 7 The through hole 701 at the lower end of the clip 7 is closer to the middle connecting portion than the opening 702 at the upper end, so that when the upper end of the elastic safety clip 7 passes through the opening 702 on which the puncture needle 2 passes, elastic deformation occurs, so that the The upper end of the elastic safety clip 7 has an elastic force toward the puncture needle 2 side. In order to facilitate assembly, the front end of the jacket 6 is preferably provided with a boss 603 that matches the inner hole of the catheter hub 3, the inner hole 604 at the rear end of the jacket 6 matches the front end of the needle hub 1, and the jacket 6 is protruded through the front end. The platform 603 and the inner hole 604 at the rear end are connected integrally with the catheter base 3 and the needle tube base 1 respectively.

Before the safety indwelling needle is used, as shown in Figures 2 and 3, the jacket 6 is connected to the catheter base 3 and the needle tube base 1 respectively through the front boss 603 and the rear end inner hole 604, and the puncture needle 2 passes through the elastic safety needle. The opening 702 at the upper end of the clip 7, the through hole 701 at the lower end and the axial channel 601 are placed in the indwelling catheter 4. At this time, the needle tube of the puncture needle 2 is at a wider position outside the opening 702, so that the upper end of the elastic safety clip 7 It has an elastic force toward the side of the puncture needle 2; as shown in Figures 6 and 7, when the indwelling needle for intravenous infusion is used, the puncture needle 2 is pulled back until the notch 201 on the tube wall of the puncture needle 2 retreats to When it is at the opening 702, the width of the puncture needle 2 is narrowed here, and under the action of the elastic force, the puncture needle 2 is stuck on the narrower position inside the opening 702 and axially limited, and due to the distance between the gap and the needle tip If it is less than the distance from the upper end of the elastic safety clip 7 to the end of the jacket 6, the needle point will be limited in the jacket 6, so as to prevent cross-infection caused by needle stabbing, which has played a role of safety protection and is very convenient to use.

Claims (2)

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 There is a gap on the tube wall of the puncture needle, and a safety device is provided between the puncture assembly and the indwelling needle assembly. The safety device includes a jacket and an elastic safety clip, and the jacket is provided with a The axial channel of the elastic safety clip is C-shaped, and the lower end of the elastic safety clip is provided with a through hole that fits with the clearance of the puncture needle, and the upper end is provided with a convex-shaped opening. Narrower, smaller than the diameter of the puncture needle and fit in clearance with the notch of the puncture needle, the elastic safety clip is arranged in the jacket, wherein the upper and lower ends of the elastic safety clip are radially arranged in the axial channel, so The upper end of the elastic safety clip is slidably arranged in the radial direction, the puncture needle passes through the axial channel and the opening at the upper end of the elastic safety clip and the through hole at the lower end, and the upper end of the elastic safety clip has an elastic force toward the puncture needle side. The distance between the notch and the needle tip is less than the distance from the upper end of the elastic safety clip to the end of the jacket. 2. The safety indwelling needle according to claim 1, characterized in that: the jacket is cylindrical, and an axial through hole is provided in the center to form the axial channel, and one side of the axial channel is provided with a The C-shaped slot matching the elastic safety clip, the two ends of the C-shaped slot radially pass through the axial channel, the front end of the jacket is provided with a boss matching the inner hole of the catheter seat, and the inner hole of the rear end of the jacket is The hole matches the front end of the needle tube base, and the jacket is respectively connected with the catheter base and the needle tube base through the boss at the front end and the inner hole at the rear end.