CN219423452U

CN219423452U - Anti-needling venous indwelling needle

Info

Publication number: CN219423452U
Application number: CN202320086931.2U
Authority: CN
Inventors: 李岩; 张传雷
Original assignee: Suzhou Linhwa Medical Devices Co ltd
Current assignee: Suzhou Linhwa Medical Devices Co ltd
Priority date: 2023-01-30
Filing date: 2023-01-30
Publication date: 2023-07-28
Anticipated expiration: 2033-01-30

Abstract

The utility model discloses an anti-needling venous indwelling needle which comprises a needle tube assembly and a catheter assembly, wherein the needle tube assembly comprises a needle tube seat and a needle tube, the catheter assembly comprises a catheter seat and a catheter, the needle tube is arranged in the catheter in a penetrating manner, the needle tube is provided with an anti-needling assembly in a penetrating manner, the anti-needling assembly comprises a shell and an elastic piece, the shell is detachably arranged at the tail end of the catheter seat, the elastic piece is arranged in the shell, the elastic piece is a V-shaped elastic piece, and the outer walls of two sides of the elastic piece are respectively abutted with the needle tube and the shell in an initial state; in the second state, the needle tube seat and the catheter seat are separated by a manual separating piece, the outer walls of the two sides of the elastic piece are respectively abutted with the shell, and a blocking area is formed between the elastic piece and the shell so as to block the needle point of the needle tube. The V-shaped structure of the elastic piece in the scheme ensures that the elastic piece has enough elastic opening to block the needle tube, shortens the axial length of the elastic piece as far as possible, integrally shortens the moving distance of the needle tube pulling out, and improves the efficiency, stability and convenience of the needle tube pulling out.

Description

Anti-needling venous indwelling needle

Technical Field

The utility model relates to the technical field of injection instruments, in particular to an anti-needling venous indwelling needle.

Background

In order to reduce the pain of repeated venipuncture of patients in the treatment process and the workload of medical staff, the venous indwelling needle is widely applied clinically. As shown in publication number CN 213964646U, in order to ensure the safety of medical staff after needle withdrawal, an intravenous needle is usually provided with a needle-stick preventing structure for closing the tip of the needle tube. The needle tube seat is usually pinched to retreat after use, and the needle point of the needle tube is sealed in the anti-needling structure and then is pulled out together with the anti-needling structure.

The needle tube of the venous indwelling needle is long because the catheter having a certain length is left in the patient after the needle tube is required to be pierced. The anti-needling structure generally includes a housing and a movable member in the housing, which blocks the outlet of the housing after retraction of the needle cannula to close the needle, but this further lengthens the retraction distance of the needle cannula and the travel distance of the needle hub. In order to reduce the cost, the conventional anti-needling structure is usually in interference fit with the catheter seat, and the needle tube is required to be pulled out by force to drive the anti-needling structure to be separated from the catheter seat hard. In the process, the overlong moving distance can increase the operation difficulty of medical staff on one hand, so that the operation is not convenient enough; on the other hand, the needle tube is thinner, and the needle tube can be broken in the process of pulling out to generate medical accidents, so that the use risk is extremely high.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide an anti-needling venous indwelling needle.

The aim of the utility model is achieved by the following technical scheme:

the needle-puncture-preventing venous indwelling needle comprises a needle tube assembly and a catheter assembly, wherein the needle tube assembly comprises a needle tube seat and a needle tube fixedly arranged at the front end of the needle tube seat, the catheter assembly comprises a catheter seat and a catheter fixedly arranged at the front end of the catheter seat, the needle tube is arranged in the catheter in a penetrating manner, the needle tube is provided with a needle-puncture-preventing assembly in a penetrating manner, the needle-puncture-preventing assembly comprises a shell and an elastic piece, the shell is detachably arranged at the tail end of the catheter seat, the elastic piece is arranged in the shell, the elastic piece is a V-shaped elastic piece, the needle tube seat is connected with the catheter seat in an initial state, the distal end of the needle tube penetrates into the catheter from the shell, and the outer walls of the two sides of the elastic piece are respectively abutted with the needle tube and the shell; in the second state, the needle tube seat and the catheter seat are separated through a manual separating piece, the outer walls of the two sides of the elastic piece are respectively abutted with the shell, and a blocking area is formed between the elastic piece and the shell so as to close the needle point of the needle tube.

Preferably, the elastic member includes a first elastic arm and a second elastic arm, the length of the first elastic arm is smaller than that of the second elastic arm, in the initial state, the first elastic arm abuts against the needle tube, and the second elastic arm abuts against the housing; the tail end of the first elastic arm is provided with a first abutting part which extends in a straight mode, the tail end of the second elastic arm is provided with a second abutting part which extends in a straight mode, and the length of the second abutting part is larger than that of the first abutting part.

Preferably, the outer wall of the first abutting portion has a recess matched with the needle tube.

Preferably, the manual separating piece comprises at least one elastic locking block arranged on the pipe wall of the shell and a clamping groove arranged on the side wall of the catheter seat; in the initial state, the elastic lock catch is clamped in the clamping groove; in the second state, the elastic lock catch is separated from the clamping groove so as to separate the shell from the catheter seat.

Preferably, an inner cavity with a T-shaped cross section is formed in the shell to limit the front and rear positions of the elastic piece.

Preferably, a blocking ring is embedded in the tail end of the shell, a through hole is formed in the axis of the blocking ring, a flat square with the outer diameter larger than the diameter of the through hole is arranged on the needle tube, and in the second state, the flat square is abutted to the blocking ring.

Preferably, the needle tube is provided with a notch matched with the tail end of the shell, and in the second state, the notch is clamped with the tail end of the shell.

Preferably, the catheter is made of biodegradable material.

Preferably, the catheter seat is further provided with a spacer plug and a limiting block, the limiting block is fixedly connected with the catheter seat so as to limit the spacer plug in the catheter seat, the axis of the limiting block is hollow so that the needle tube passes through, the catheter seat is internally provided with a cavity, and the cavity is communicated with a second catheter.

The needle-puncture-preventing venous indwelling needle comprises a needle tube assembly and a catheter assembly, wherein the needle tube assembly is matched with the catheter tube assembly, the needle tube assembly comprises a needle tube seat and a needle tube fixedly arranged at the front end of the needle tube seat, the catheter tube assembly comprises a catheter tube seat and a catheter fixedly arranged at the front end of the catheter tube seat, the needle tube is arranged in the catheter tube in a penetrating manner, the needle tube is provided with a needle-puncture-preventing assembly in a penetrating manner, the needle-puncture-preventing assembly comprises a shell and an elastic piece, the shell is detachably arranged at the tail end of the catheter tube seat, the elastic piece is arranged in the shell, the elastic piece is a V-shaped elastic piece, the elastic piece comprises a first elastic arm and a second elastic arm, and in an initial state, the first elastic arm is in butt joint with the needle tube, and the second elastic arm is in butt joint with the shell; in the second state, the needle tube seat and the catheter seat are separated through a manual separating piece, the elastic piece is deformed, the included angle between the first elastic arm and the second elastic arm is changed, and the connecting ends of the first elastic arm and the second elastic arm form a blocking area to block the needle point of the needle tube.

The beneficial effects of the utility model are mainly as follows:

1. the V-shaped structure of the elastic piece enables the elasticity of the elastic piece to be increased along with the axial length reduction of the first elastic arm and the second elastic arm, so that the elastic piece can be ensured to have enough elastic expansion to block the needle tube, and meanwhile, the axial length of the elastic piece is reduced as much as possible, so that the length of a shell of the needle-prick prevention assembly is reduced, the moving distance of the needle tube is integrally shortened, and the efficiency, the stability and the convenience of pulling out the needle tube are improved;

2. the shell is detachably clamped with the catheter seat through the manual separating piece, so that after the needle tube is sealed by the elastic piece, the shell and the catheter seat can be quickly separated by pressing the elastic lock catch, a traditional hard-pulling mode is replaced, the situation that the needle tube is broken during hard-pulling is avoided, and the pulling efficiency and the safety of the anti-needling assembly are improved;

3. the catheter is made of biodegradable materials, and when the catheter breaks to generate catheter fragments, the catheter fragments can be biodegraded with time so as to ensure the use safety.

Drawings

The technical scheme of the utility model is further described below with reference to the accompanying drawings:

fig. 1: an explosion schematic diagram of an embodiment of the utility model;

fig. 2: partial structure schematic diagrams of the embodiment of the utility model;

fig. 3: a cross-sectional view of an embodiment of the present utility model;

fig. 4: schematic illustration of an anti-needling assembly in an embodiment of the present utility model;

fig. 5: schematic illustration of the elastic member in the embodiment of the utility model.

Detailed Description

The present utility model will be described in detail below with reference to specific embodiments shown in the drawings. The embodiments are not limited to the present utility model, and structural, methodological, or functional modifications of the utility model from those skilled in the art are included within the scope of the utility model.

In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the scheme, the direction approaching the operator is the near end, and the direction separating from the operator is the far end, with reference to the operator.

As shown in fig. 1 to 5, the utility model discloses an anti-needling venous indwelling needle, which comprises a needle tube assembly and a catheter assembly which are matched, wherein the needle tube assembly comprises a needle tube seat 1 and a needle tube 2 fixedly arranged at the front end of the needle tube seat 1, the catheter assembly comprises a catheter seat 3 and a catheter 4 fixedly arranged at the front end of the catheter seat 3, the needle tube 2 is penetrated into the catheter 4, an anti-needling assembly is penetrated on the needle tube 2, the anti-needling assembly comprises a shell 5 and an elastic piece 6, the shell 5 is detachably arranged at the tail end of the catheter seat 3, the elastic piece 6 is arranged in the shell 5, the elastic piece 6 is a V-shaped elastic piece, in an initial state, the needle tube seat 1 is connected with the catheter seat 3, the distal end of the needle tube 2 penetrates into the catheter 4 from the shell 5, and the outer walls of two sides of the elastic piece 6 are respectively abutted with the shell 2 and the shell 5; in the second state, the needle tube seat 1 and the catheter seat 3 are separated by a manual separating piece, and the outer walls of the two sides of the elastic piece 6 are respectively abutted against the shell 5, and a blocking area is formed between the elastic piece and the shell 5 so as to close the needle point of the needle tube 2.

Specifically, as shown in fig. 2 and 5, the elastic member 6 includes a first elastic arm 601 and a second elastic arm 602, the length of the first elastic arm 601 is smaller than that of the second elastic arm 602, in the initial state, the first elastic arm 601 abuts against the needle tube 2, and the second elastic arm 602 abuts against the housing 5. The elastic member 6 in the present utility model is preferably V-shaped, and the V-shaped structure increases the elasticity of the elastic member along with the axial length reduction of the first elastic arm 601 and the second elastic arm 602, so that the axial length of the elastic member 6 can be reduced as much as possible while ensuring that the elastic member 6 has enough elastic expansion to block the needle tube 2, and the axial length of the housing 5 can be further reduced, so that the moving distance of the needle tube 2 can be integrally shortened, and the efficiency, stability and convenience of pulling out the needle tube 2 can be improved.

Further, the end of the first elastic arm 601 has a first abutting portion 6011 extending straight, the end of the second elastic arm 602 has a second abutting portion 6021 extending straight, and the length of the second abutting portion 6021 is greater than the first abutting portion 6011. The structure in which the first abutting portion 6011 and the second abutting portion 6021 extend straight can increase the contact area between the first abutting portion and the needle tube 2 and the housing 5, and further improve the abutting stability between the first abutting portion and the needle tube 2 and the housing 5.

In order to ensure the stability of the contact between the first contact portion 6011 and the needle tube 2, the outer wall of the first contact portion 6011 has a recess 6012 that matches the outer diameter of the needle tube 2.

As shown in fig. 1 and 2, the manual separating member comprises at least one elastic locking piece 501 arranged on the pipe wall of the casing 5, and a clamping groove 301 arranged on the side wall of the catheter seat 3; in the initial state, the elastic lock catch 501 is clamped in the clamping groove 301; in the second state, the elastic lock 501 is separated from the clamping groove 301 to separate the housing 5 from the catheter holder 3. The shell 5 is detachably clamped with the catheter seat 3 through the elastic locking block 501, so that after the needle tube 2 is sealed by the elastic piece 6, the shell 5 and the catheter seat 3 can be quickly separated by pressing the elastic locking block 501, a traditional hard-pulling mode is replaced, the situation that the needle tube 2 is broken when being pulled out is avoided, and the pulling-out efficiency and the safety of the needle-punching-preventing assembly are improved.

The shell 5 in this scheme is by two symmetrical shell walls concatenation forms, and two the shell wall is preferable to adopt the mode concatenation of joint to become integrative, and is other feasible, two the shell wall also can adopt other feasible modes, the shell 5 also can integrated into one piece. An inner cavity 502 having a T-shaped cross section is formed in the housing 5 to define the front-rear position of the elastic member 6. The distal end diameter of the inner cavity 502 of the housing 5 is smaller than the proximal end diameter thereof to be matched with the V-shaped elastic piece 6, so that the inner cavity 502 is abutted against the front end and the rear end of the elastic piece 6 to limit the axial position of the elastic piece 6, the axis of the elastic piece 6 is ensured to be coaxial with the axis of the housing 5, and then the needle point of the needle tube 2 can be blocked after the elastic piece 6 is opened, and the needle point of the needle tube 2 is prevented from being pierced.

As shown in fig. 4, a blocking ring 7 is embedded in the tail end of the housing 5, a through hole 701 is formed in the shaft center of the blocking ring 7, a flat square 201 with an outer diameter larger than the diameter of the through hole 701 is formed on the needle tube 2, and in the second state, the flat square 201 abuts against the blocking ring 7 to prevent the needle tube 2 from being pulled out of the anti-needling assembly. Further, the needle tube 2 has a notch 202 matching with the tail end of the housing 5, and in the second state, the notch 202 is engaged with the tail end of the housing 5 to further limit the position of the needle tube 2.

The catheter 4 in the present utility model is made of biodegradable material, preferably polylactic acid material, so that when the catheter 4 breaks to generate catheter fragments, the catheter fragments are biodegraded with time, thereby ensuring the safety of use.

In addition, a isolating plug 8 and a limiting block 9 are further arranged in the catheter seat 3, the limiting block 9 is fixedly connected with the catheter seat 3 so as to limit the isolating plug 8 in the catheter seat 3, and the axis of the limiting block 9 is hollow so that the needle tube 2 passes through.

The catheter seat 3 is provided with a cavity, the cavity is communicated with a second catheter 10, the second catheter 10 can be connected with other liquid medicines to be injected through a positive pressure connecting piece, and in addition, the prior art is not the key point of the scheme and is not repeated here.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. Prevent acupuncture vein and keep somewhere needle, including assorted needle tubing subassembly and pipe subassembly, the needle tubing subassembly include needle tube seat (1) and set firmly in needle tubing (2) of needle tube seat (1) front end, the pipe subassembly include pipe seat (3) and set firmly in pipe (4) of pipe seat (3) front end, needle tubing (2) wear to locate in pipe (4), its characterized in that: the needle tube (2) is provided with a needling prevention component in a penetrating way, the needling prevention component comprises a shell (5) and an elastic piece (6), the shell (5) is detachably arranged at the tail end of the catheter seat (3), the elastic piece (6) is arranged in the shell (5), the elastic piece (6) is a V-shaped elastic piece, in an initial state, the needle tube seat (1) is connected with the catheter seat (3), the far end of the needle tube (2) penetrates from the shell (5) to extend into the catheter (4), and the outer walls of the two sides of the elastic piece (6) are respectively abutted with the needle tube (2) and the shell (5); in the second state, the needle tube seat (1) and the catheter seat (3) are separated through a manual separating piece, the outer walls of the two sides of the elastic piece (6) are respectively abutted with the shell (5), and a blocking area is formed between the elastic piece and the shell (5) so as to close the needle point of the needle tube (2).

2. The needle-stick resistant intravenous catheter of claim 1, wherein: the elastic piece (6) comprises a first elastic arm (601) and a second elastic arm (602), the length of the first elastic arm (601) is smaller than that of the second elastic arm (602), in the initial state, the first elastic arm (601) is abutted with the needle tube (2), and the second elastic arm (602) is abutted with the shell (5); the tail end of the first elastic arm (601) is provided with a first abutting part (6011) which extends in a straight mode, the tail end of the second elastic arm (602) is provided with a second abutting part (6021) which extends in a straight mode, and the length of the second abutting part (6021) is larger than that of the first abutting part (6011).

3. The needle-stick resistant intravenous catheter of claim 2, wherein: the outer wall of the first abutting part (6011) is provided with a concave part (6012) matched with the needle tube (2).

4. The needle-stick resistant intravenous catheter of claim 1, wherein: the manual separating piece comprises at least one elastic lock catch (501) arranged on the pipe wall of the shell (5), and a clamping groove (301) arranged on the side wall of the catheter seat (3); in the initial state, the elastic lock catch (501) is clamped in the clamping groove (301); in the second state, the elastic lock catch (501) is separated from the clamping groove (301) so as to separate the shell (5) from the catheter seat (3).

5. The needle-stick resistant intravenous catheter of claim 4, wherein: an inner cavity (502) with a T-shaped cross section is formed in the shell (5) to limit the front and back positions of the elastic piece (6).

6. The needle-stick resistant intravenous catheter of claim 5, wherein: the tail end of the shell (5) is embedded with a baffle ring (7), the axle center of the baffle ring (7) is provided with a through hole (701), the needle tube (2) is provided with a flat square (201) with the outer diameter larger than the diameter of the through hole (701), and in the second state, the flat square (201) is abutted with the baffle ring (7).

7. The needle-stick resistant intravenous catheter of claim 6, wherein: the needle tube (2) is provided with a notch (202) matched with the tail end of the shell (5), and in the second state, the notch (202) is clamped with the tail end of the shell (5).

8. The needle-stick resistant intravenous catheter of claim 1, wherein: the catheter (4) is made of biodegradable material.

9. The needle-stick resistant intravenous catheter of claim 8, wherein: still be provided with in pipe seat (3) isolation plug (8) and stopper (9), stopper (9) with pipe seat (3) rigid coupling is in order will isolation plug (8) are defined in pipe seat (3), the axle center cavity of stopper (9) is so that needle tubing (2) pass, have the cavity in pipe seat (3), the cavity intercommunication has second pipe (10).

10. Prevent acupuncture vein and keep somewhere needle, including assorted needle tubing subassembly and pipe subassembly, the needle tubing subassembly include needle tube seat (1) and set firmly in needle tubing (2) of needle tube seat (1) front end, the pipe subassembly include pipe seat (3) and set firmly in pipe (4) of pipe seat (3) front end, needle tubing (2) wear to locate in pipe (4), its characterized in that: the needle tube (2) is provided with a needling prevention component in a penetrating way, the needling prevention component comprises a shell (5) and an elastic piece (6), the shell (5) is detachably arranged at the tail end of the catheter seat (3), the elastic piece (6) is arranged in the shell (5), the elastic piece (6) is a V-shaped elastic piece, the elastic piece (6) comprises a first elastic arm (601) and a second elastic arm (602), the first elastic arm (601) is abutted with the needle tube (2) in an initial state, and the second elastic arm (602) is abutted with the shell (5); in the second state, the needle tube seat (1) and the catheter seat (3) are separated through a manual separating piece, the elastic piece (6) is deformed, the first elastic arm (601) and the second elastic arm (602) form an included angle change, and the connecting ends of the first elastic arm and the second elastic arm form a blocking area so as to block the needle point of the needle tube (2).