CN216366177U

CN216366177U - Safety indwelling needle

Info

Publication number: CN216366177U
Application number: CN202023122206.1U
Authority: CN
Inventors: 张谦; 张勇; 王文岳; 王剑光; 陈洪; 娄卓远
Original assignee: Zhejiang Kindly Medical Devices Co Ltd
Current assignee: Zhejiang Kindly Medical Devices Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2022-04-26
Anticipated expiration: 2030-12-22

Abstract

The utility model relates to a safety indwelling needle which comprises a puncture component, an indwelling needle component, a safety seat and a safety protection structure, wherein a reed containing cavity is arranged in the safety seat, a blocking hook which is reversely bent to form an acute angle is arranged at the end part of the reed containing cavity, an axial through hole for a puncture needle head to pass through is arranged in the center of the safety seat, the blocking hook is eccentrically arranged and is positioned at the other side of the axis of a needle passing hole relative to an L-shaped corner, and a protruding blocking block is arranged in the reed containing cavity and axially opposite to the blocking hook. Because be equipped with squashed screens 201 on the puncture syringe needle anterior segment, squashed screens 201 is greater than cross the pinhole, after the use, through squashed screens 201 with cross the cooperation of pinhole and prevent that the safety seat is extracted from puncture syringe needle anterior segment, limit the needle point in the safety seat, utilize simultaneously keep off the hook and block that the syringe needle exposes from the safety seat, and then played safety protection's effect, and product structure is very simple.

Description

Safety indwelling needle

Technical Field

The utility model relates to a medical injector, in particular to a safe indwelling needle.

Background

The indwelling needle is an infusion apparatus for replacing a traditional disposable infusion needle, so as to reduce the pain of repeated puncture of a patient and reduce the nursing workload of medical staff, and is widely applied clinically. The structure of the puncture needle comprises a puncture component consisting of a needle base and a puncture needle head, a rubber plug, a catheter base and an indwelling catheter. The indwelling catheter is arranged at the front end of the catheter base, a puncture needle wing panel is arranged on the side surface of the catheter base, the indwelling catheter axially penetrates through a needle head channel forming a needle head, the rubber plug is fixedly arranged in the catheter base, and the puncture needle head in the puncture assembly penetrates through the rubber plug to be inserted into the indwelling catheter. When in use, the indwelling catheter is guided to pierce into a vein through the puncture needle head, then the puncture assembly is pulled out, and then the indwelling catheter is used for continuously infusing the liquid medicine into the artery and vein of a patient. Because the puncture component is disposable, in order to avoid secondary cross infection caused by the fact that a needle punctures a person in the process of garbage disposal or recycling, the existing intravenous transfusion remaining needle is provided with a safety protection structure to form a safety remaining needle for protecting the used remaining needle. However, the existing safety protection structure is complex, large in size, inconvenient to produce and high in production cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a safe indwelling needle with simpler structure and lower production cost.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a safety indwelling needle, includes the puncture subassembly, stays needle subassembly, safety seat and safety protection structure, the puncture subassembly includes the needle file and fixes the puncture needle head on the needle file front end, keeps somewhere the needle subassembly and includes the pipe seat and fix the catheter of keeping somewhere at the front end, pipe seat and needle file clearance grafting cooperation, its characterized in that: the safety protection structure comprises a safety seat and a spring piece, wherein a safety seat accommodating cavity is formed in the front end of the needle seat, the safety seat is arranged in the safety seat accommodating cavity in a clearance fit mode, an axial through hole for a puncture needle to penetrate through is formed in the center of the safety seat, the spring piece is integrally L-shaped and is provided with a fixing part arranged transversely and a longitudinal elastic cantilever part, and a stop hook bent reversely to form an acute angle is arranged at the end part of the elastic cantilever part; be equipped with the reed in the safety seat and hold the chamber, the through hole passes the reed holds the chamber and runs through whole safety seat, the spring leaf passes through the fixed setting of fixed part and is in the reed of safety seat holds the chamber, elasticity cantilever part is the free end, on the fixed part of spring leaf with the corresponding position of through hole is equipped with the pinhole, be equipped with flattened screens 201 on the puncture syringe needle anterior segment, flattened screens 201 is greater than cross the pinhole, keep off the eccentric setting of hook, be in and cross the pinhole axis for the opposite side at L type turning, the reed hold the chamber with keep off the hook axial relative position and be equipped with outstanding dog.

The safety seat is further provided with a stepped shaft shape with a small upper part and a large lower part, the upper end of the stepped shaft shape is inserted and matched with the inner hole of the catheter seat, the lower end of the stepped shaft shape is inserted and matched with the inner diameter of the safety seat accommodating cavity at the front end of the needle seat, the side wall of the safety seat is provided with an open cavity to form the reed accommodating cavity, the bottom of the reed accommodating cavity is provided with an insertion groove for inserting the fixing part of the spring piece, and the spring piece is inserted into the insertion groove through the fixing part and is fixedly arranged in the reed accommodating cavity.

As a further arrangement of the utility model, the safety indwelling needle is also provided with an anti-drop structure for preventing the catheter seat from dropping off from the needle seat; the upper end of the elastic cantilever part of the spring piece is provided with a shoulder step, the position of the inner hole wall of the catheter seat corresponding to the shoulder step is provided with a pit or a window matched with the shoulder step, and the shoulder step is matched with the pit or the window to form the anti-falling structure.

Compared with the prior art, the safety device has the advantages that the reed containing cavity is arranged in the safety seat, the stop hook which is reversely bent to form an acute angle is arranged at the end part of the reed containing cavity, the axial through hole for the puncture needle to penetrate through is formed in the center of the safety seat, the stop hook is eccentrically arranged and is positioned on the other side, opposite to the L-shaped corner, of the axis of the needle passing hole, and the protruding stop block is arranged in the reed containing cavity and axially opposite to the stop hook. Because be equipped with the flat screens on the puncture syringe needle anterior segment, flat screens is greater than cross the pinhole, after the use, through flat screens with cross the cooperation of pinhole and prevent the safety seat is extracted from puncture syringe needle anterior segment, be in with the needle point restriction in the safety seat, utilize simultaneously the fender hook blocks that the syringe needle exposes from the safety seat, and then has played safety protection's effect, and product structure is very simple.

The utility model is further described with reference to the following figures and specific embodiments.

It is to be noted that the terms "comprises" and "comprising," as well as any variations thereof, in the description and claims of this application are intended to cover non-exclusive inclusions, with the terms "upper," "lower," "top," "bottom," "inner," "outer," "middle," and the like, indicating orientations or positional relationships based on the orientation or positional relationship as shown in the figures. These terms are used primarily to better describe the utility model and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Drawings

FIG. 1 is a schematic perspective view of a specific embodiment of the present invention before use;

FIG. 2 is an exploded view of a portion of the structure of the present invention prior to use in accordance with an embodiment of the present invention;

FIG. 3 is a front elevational view of a specific embodiment of the present invention in use;

FIG. 4 is a cross-sectional view of the drawing of FIG. 3A-A;

FIG. 5 is an enlarged view of a portion of FIG. 4I;

FIG. 6 is a schematic perspective view of a safety seat according to an embodiment of the present invention;

FIG. 7 is a front view of an embodiment of the safety seat of the present invention;

FIG. 8 is a cross-sectional view of FIGS. 7B-B;

FIG. 9 is a schematic perspective view of a spring plate according to an embodiment of the present invention;

FIG. 10 is a front view of a spring plate according to an embodiment of the present invention;

FIG. 11 is a schematic perspective view of a used embodiment of the present invention;

FIG. 12 is a front elevational view, after use, of an embodiment of the present invention;

FIG. 13 is a cross-sectional view of the cartridge of FIG. 12C-C;

fig. 14 is an enlarged view of a portion of fig. 13 II.

Detailed Description

As shown in fig. 1-3, the safety indwelling needle of the present invention comprises a puncture assembly, an indwelling needle assembly, a safety seat and a safety protection structure, wherein the puncture assembly comprises a needle seat 1 and a puncture needle head 2 fixed on the front end of the needle seat 1, the indwelling needle assembly comprises a catheter seat 3 and an indwelling catheter 4 fixed on the front end, and the catheter seat 3 and the needle seat 1 are in clearance insertion fit to form a detachable connection. The safety protection structure comprises a safety seat 5 and a spring leaf 6, wherein a safety seat accommodating cavity 101 is formed in the front end of the needle seat 1, the safety seat 5 is arranged in the safety seat accommodating cavity 101 in a clearance fit manner, an axial through hole 502 for the puncture needle 2 to pass through is formed in the center of the safety seat 5, the through hole 502 is coaxially arranged with the indwelling catheter 4, as shown in fig. 9-10, the spring leaf 6 is integrally L-shaped and is provided with a transversely arranged fixing part 601 and a longitudinal elastic cantilever part 602, a stop hook 603 which is reversely folded to form an acute angle is arranged at the end part (front end) of the elastic cantilever part 602, and the spring leaf 6 is made of strip-shaped elastic sheets through stamping and bending, preferably made of high-elasticity materials such as phosphorus copper sheets; the safety seat 5 is provided with a reed holding cavity 501, the through hole 502 penetrates through the reed holding cavity 501 and penetrates through the whole safety seat 5, the spring piece 6 is fixedly arranged in the reed holding cavity 501 of the safety seat 5 through a fixing part 601, the elastic cantilever part 602 is a free end, a through hole 604 is arranged at a position corresponding to the through hole 502 on the fixing part 601 of the spring piece 6, the front end of the puncture needle 2 penetrates through the through hole 502 and the through hole 604, a squashed clip 201 is arranged on the front section, the squashed clip 201 is larger than the through hole 604, the clip 201 is positioned in front of the through hole 604 (namely, on one side close to the needle point), the blocking hook 603 is eccentrically arranged under a free state without external force when the elastic cantilever part 602 is positioned, namely, on the other side of the axis of the through hole 604 relative to an L-shaped corner, in the specific embodiment, the L-shaped corner is an acute angle smaller than 90 degrees, the effect of eccentrically arranging the catch hook 603 is achieved.

In this embodiment, as shown in fig. 6 to 8, the safety seat 5 is integrally in a stepped shaft shape with a small top and a large bottom, the upper end of the stepped shaft shape is detachably connected to the inner hole of the catheter seat 3 in an inserting manner, the lower end of the stepped shaft shape is detachably connected to the inner diameter of the safety seat accommodating cavity 101 at the front end of the needle seat 1 in an inserting manner, the side wall of the safety seat 5 is provided with an open cavity to form the reed accommodating cavity 501, the bottom of the reed accommodating cavity 501 is provided with a slot 503 into which the fixing portion 601 of the spring piece 6 is inserted, the spring piece 6 is placed from the side opening, and the fixing portion 601 is inserted into the slot 503 and is fixedly disposed in the reed accommodating cavity 501.

In order to prevent the catheter seat 3 from falling off from the needle seat 1 before use, the safe indwelling needle is also provided with an anti-falling structure for preventing the catheter seat 3 from falling off from the needle seat 1; in this embodiment, a shoulder step is disposed at the upper end of the elastic cantilever 602 of the spring plate 6, the shoulder step may be formed by stamping and bending, a concave pit or a window matched with the shoulder step is disposed at a position of the inner hole wall of the catheter hub 3 corresponding to the shoulder step, and the shoulder step and the concave pit or the window are matched to form the anti-falling structure.

As shown in fig. 4-5, before the safety indwelling needle of the present invention is used, the safety seat 5 is arranged in the safety seat cavity 101 in a clearance fit manner, the rear end of the inner hole of the catheter seat 3 is inserted into the safety seat cavity 101 at the front end of the needle seat 1 and is connected with the front end of the safety seat 5 in an insertion manner, the front end of the puncture needle head 2 passes through the through hole 502 and the needle passing hole 604 to the indwelling catheter 4 at the front end of the catheter seat 3, at this time, the stop hook 603 at the front end of the elastic cantilever part 602 is located on the same side of the axis of the needle passing hole 604 relative to the L-shaped corner, and elastically abuts against the puncture needle head 2.

As shown in fig. 11-14, after the safety indwelling needle of the present invention is used, the needle base 1 is pulled back, and since the front section of the puncture needle head 2 is provided with the flattened clip 201, the flattened clip 201 is larger than the needle passing hole 604, the needle point is limited in the safety base 5, and the hook is used to block the needle head from being exposed from the safety base 5, thereby playing a role of safety protection.

Claims

1. The utility model provides a safety indwelling needle, includes the puncture subassembly, stays needle subassembly, safety seat and safety protection structure, the puncture subassembly includes the needle file and fixes the puncture needle head on the needle file front end, keeps somewhere the needle subassembly and includes the pipe seat and fix the catheter of keeping somewhere at the front end, pipe seat and needle file clearance grafting cooperation, its characterized in that: the safety protection structure comprises a safety seat and a spring piece, wherein a safety seat accommodating cavity is formed in the front end of the needle seat, the safety seat is arranged in the safety seat accommodating cavity in a clearance fit mode, an axial through hole for a puncture needle to penetrate through is formed in the center of the safety seat, the spring piece is integrally L-shaped and is provided with a fixing part arranged transversely and a longitudinal elastic cantilever part, and a stop hook bent reversely to form an acute angle is arranged at the end part of the elastic cantilever part; be equipped with the reed in the safety seat and hold the chamber, the through hole passes the reed holds the chamber and runs through whole safety seat, the spring leaf passes through the fixed setting of fixed part and is in the reed of safety seat holds the chamber, elasticity cantilever part is the free end, on the fixed part of spring leaf with the corresponding position of through hole is equipped with the pinhole, be equipped with squashed screens 201 on the puncture syringe needle anterior segment, squashed screens 201 is greater than cross the pinhole, keep off the eccentric setting of hook, be in the opposite side of crossing the pinhole axis for L type turning.

2. The safety indwelling needle according to claim 1, wherein: the safety seat is wholly in a stepped shaft shape with a small upper end and a large lower end, the upper end of the safety seat is inserted into the inner hole of the catheter seat, the lower end of the safety seat is inserted into the inner diameter of the safety seat accommodating cavity at the front end of the needle seat, the side wall of the safety seat is provided with an open cavity to form the reed accommodating cavity, the bottom of the reed accommodating cavity is provided with a slot for inserting the fixing part of the spring piece, and the spring piece is inserted into the fixing part and fixedly arranged in the reed accommodating cavity.

3. The safety indwelling needle according to claim 1, wherein: the safe indwelling needle is also provided with an anti-drop structure for preventing the catheter seat from dropping off from the needle seat; the upper end of the elastic cantilever part of the spring piece is provided with a shoulder step, the position of the inner hole wall of the catheter seat corresponding to the shoulder step is provided with a pit or a window matched with the shoulder step, and the shoulder step is matched with the pit or the window to form the anti-falling structure.