CN213252045U

CN213252045U - Safe needle mechanism

Info

Publication number: CN213252045U
Application number: CN202022025775.8U
Authority: CN
Inventors: 陈帼英; 陆昊晟
Original assignee: Tongxiang First Peoples Hospital
Current assignee: Tongxiang First Peoples Hospital
Priority date: 2020-09-16
Filing date: 2020-09-16
Publication date: 2021-05-25
Anticipated expiration: 2030-09-16

Abstract

The utility model discloses a safe syringe needle mechanism, include: an infusion needle assembly and a safety assembly. When in use, the clamping plate in the safety assembly is clamped in the bayonet of the infusion needle assembly, so that the axial movement of the needle body in the needle sleeve is limited. Thereby ensuring that the needle head can not extend out after retreating into the needle sleeve. The cutting edge on the needle body is effectively accomodate promptly, and medical personnel are pricked probability greatly reduced who is wounded by the needle point.

Description

Safe needle mechanism

Technical Field

The utility model relates to the field of medical infusion needles, in particular to a safe needle head mechanism.

Background

Puncture type medical consumables such as disposable transfusion system, blood sampling subassembly need puncture patient through the disposable syringe needle that its self carried in the use, and then accomplish the connected passage between patient and the external environment. After the medical garbage is used, the medical garbage needs to be specially treated to prevent outflow so as to avoid unnecessary infection risk. However, the above operation only ensures safe disposal of the used medical consumables. However, in the using process, the disposable needle is a sharp device, so that medical staff are easily injured, and the medical staff become high risk groups which are easily infected. Therefore, a safe and low-cost needle mechanism is an urgent need in clinical medicine.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a safe needle mechanism, which can safely treat the needle after medical staff extracts the needle inside the patient, and prevent the needle from being exposed and pricked.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a safety needle mechanism comprising:

a needle assembly having a needle hub with a distal end and a proximal end; the needle body is communicated with the needle seat in a fluid mode, the needle body is provided with a far end and a near end, the near end of the needle body is connected with the far end of the needle seat, an inward concave bayonet is arranged on the side wall of the needle body, the near end of the needle seat is communicated with the catheter in a fluid mode, and needle wings are arranged on the side face of the needle seat in a radial mode;

the safety assembly is detachably sleeved on the needle head assembly; comprising a cannula having a distal end and a proximal end; a needle hub having a distal end and a proximal end; the near end of the needle sleeve is coaxially connected with the far end of the sleeve, a U-shaped opening is formed in the side wall of the needle sleeve so that elastic tongue plates which are axially arranged are formed on the needle sleeve, each elastic tongue plate is provided with a movable end separated from the needle sleeve, and the end part of each movable end is inwards and radially folded into a clamping plate; when the needle body is pulled out of the patient, the clamping plate is clamped into the bayonet under the action of the elastic tongue plate to form locking.

Furthermore, the bayonet is arranged back to the needle point inclined plane of the needle body.

Further, radially outward extending wings are provided on the outer side wall of the sleeve.

Furthermore, an axially-recessed positioning groove is formed in the end face of the near end of the needle sleeve, and a positioning block matched with the positioning groove is arranged on the surface of the needle seat.

Has the advantages that: through above-mentioned structure, can effectively solve the medical consumables that has the syringe needle and stab medical personnel easily and lead to cross infection's problem in the use.

Drawings

Fig. 1 is an initial state of the present invention;

FIG. 2 is an enlarged sectional view of I in FIG. 1;

FIG. 3 is a view showing the needle body of the present invention after being pulled out from the patient;

FIG. 4 is an enlarged cross-sectional view of II of FIG. 3;

FIG. 5 is a cross-sectional view of the safety assembly in an initial state when the safety assembly is positioned on the needle assembly;

fig. 6 is a view illustrating the state of the present invention from the assembly to the completion of use.

Reference numerals: 100, a needle assembly 110, a needle seat 111, a positioning block 120, a needle body 121, a bayonet 130, a needle wing 200, a safety assembly 210, a sleeve 211, a wing plate 212, a positioning groove 220, a needle sleeve 221, a U-shaped opening 222, a movable end 222b of an elastic tongue plate 222a and a clamping plate 300 and a catheter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In this embodiment, the terms "distal" and "proximal" are relative to the catheter. The side close to the catheter is the near end, and the side far away from the catheter is the far end.

A safety needle mechanism as shown in fig. 1 to 4 includes a needle assembly 100 and a safety assembly 200 detachably mounted on the needle assembly. Wherein the needle assembly has a hub 110 having a distal end and a proximal end. A needle body 120 in fluid communication with the hub, the needle body also having a distal end and a proximal end. The near end of the needle body is connected with the far end of the needle seat. Meanwhile, the side wall of the needle body is provided with an inward-concave bayonet 121. In addition, a catheter 300 is in communication with the proximal end of the hub. So as to realize the connection with other medical appliances such as a rear disposable infusion set, a blood sampling assembly and the like. Finally, radially extending on the side of the needle hub is provided a needle wing 130 for use by medical personnel when inserting the needle.

The safety assembly 200 includes a cannula 210 and a needle hub 220. Wherein the cannula is cylindrical and has a distal end and a proximal end. While the needle hub is likewise cylindrical and has a distal end and a proximal end. The sleeve is sleeved with the needle base in a sliding fit manner, and the needle sleeve is sleeved with the needle body in a sliding fit manner. The proximal end of the needle hub and the distal end of the cannula are coaxially connected. It should be noted that a certain interference exists between the cannula and the needle holder to ensure that the safety assembly does not fall off from the needle assembly during transportation. Meanwhile, the side wall of the needle sleeve is further provided with a U-shaped opening 221, the U-shaped opening is arranged along the axial direction of the needle sleeve, so that an elastic tongue plate 222 which is axially arranged is formed on the needle sleeve, the elastic tongue plate is provided with a movable end 222a separated from the needle sleeve, and the end part of the movable end is turned inwards and radially to form a clamping plate 222 b. When the disposable infusion set is not used, the buckling plate is pressed on the surface of the needle body under the action of the elastic tongue plate. And after the needle body is pulled out of the patient body, the clamping plate enters the bayonet to realize the axial restraint of the needle body.

As a further improvement of the above embodiment, in order to reduce the influence of the safety set on the insertion of the needle body, the bayonet 121 is disposed at a position facing away from the needle tip slope of the needle body.

As a further improvement of the above embodiment, in order to facilitate the medical staff to identify the position of the latch plate and to rotate and press and fix the safety assembly conveniently when pulling out the needle, as shown in fig. 5, a radially outward extending wing plate 211 is provided on the outer side wall of the cannula.

As a further improvement to the above embodiment, to reduce the probability of malfunction, an axially recessed detent 212 is provided on the proximal end face of the needle hub. Meanwhile, a positioning block 111 matched with the positioning groove is arranged on the surface of the needle seat. When the locating piece was located the constant head tank, then it was correct with the assembly of syringe needle subassembly to show safe subassembly, the utility model discloses can normal performance function. If the two is not in the adaptive state, the medical care personnel can use the utility model after aligning the two.

The working principle is as follows: as shown in fig. 6, when in use, a medical worker pulls out a needle cap (not shown in the figure) which is sleeved on the needle body and is inserted with the needle sleeve, and then holds the needle wing with hands to insert the needle body into the blood vessel of the patient to realize the circulation connection with the blood vessel. After the completion was used, medical personnel stirred the safety subassembly that the pterygoid lamina made and rotated certain angle (the buckle board rotates to the bayonet socket and is located one side at the needle body place) on the needle body and then pressed the sleeve pipe, made the unable removal of sleeve pipe, then pulled out the needle body from patient is internal. In the process of pulling out, the needle body enters into safety subassembly, and when the bayonet socket was located through the buckle board, the buckle board was gone into to the bayonet socket under the effect of elasticity hyoplastron in, and this hour hand body is locked in safety subassembly and can't be at longitudinal movement. I.e. the needle tip is in the safety assembly and cannot be extended. The cross infection caused by the puncture of the medical staff by the needle point can not occur. It should be noted that, the required rotation angle of the safety assembly takes the included angle between the snap plate and the bayonet as an optimal angle. In the specific implementation process, the angle of the assembled medical staff and the assembled medical staff can be controlled within the range of 30-60 degrees in order to facilitate the operation of the medical staff.

Claims

1. A safety needle mechanism, comprising:

2. A safety needle mechanism as claimed in claim 1, wherein: the bayonet is arranged back to the needle point inclined plane of the needle body.

3. A safety needle mechanism as claimed in claim 1 or claim 2, wherein: and a wing plate extending radially outwards is arranged on the outer side wall of the sleeve.

4. A safety needle mechanism as claimed in claim 3, wherein: the needle sleeve is characterized in that an axially-recessed positioning groove is formed in the end face of the near end of the needle sleeve, and a positioning block matched with the positioning groove is arranged on the surface of the needle base.