CN216090855U

CN216090855U - Plastic needle for micro-residual root canal and injector made of plastic needle

Info

Publication number: CN216090855U
Application number: CN202122584252.1U
Authority: CN
Inventors: 吕东霞
Original assignee: Shenyang Aibang Technology Co ltd
Current assignee: Shenyang Aibang Technology Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-03-22
Anticipated expiration: 2031-10-26

Abstract

The utility model provides a little plastic needle for residual root canal, needle file including integrative injection moulding, handle and toper needle tubing, the stub end outside of needle file is equipped with the external screw thread, the needle tubing inner chamber of toper needle tubing is big end down's toper, the handle is fixed on the outer wall of needle file or toper needle tubing, the inner chamber upper portion of needle file is equipped with a bellying, the bellying links firmly together with toper needle tubing, form annular recess between the surface of bellying and the inner wall of needle file, the needle tubing inner chamber downwardly extending passes through the inner chamber of well kenozooecium intercommunication needle file of bellying. Compared with the prior art, the conical needle tube has the technical effects that the bulge is arranged, the filling agent only remains in the hollow part of the bulge and the needle tube cavity of the conical needle tube, the inner wall of the front part of the conical head is in interference fit with the bulge, and the filling agent cannot enter the front part of the conical head and the outer side of the bulge and remains in a very small amount.

Description

Plastic needle for micro-residual root canal and injector made of plastic needle

Technical Field

The utility model relates to the technical field of plastic needles for dental root canals, in particular to a plastic needle for a micro-residual root canal and a syringe made of the plastic needle.

Background

At present, in order to enable a needle tube to reach a required position for washing, imbibing or filling filler without being blocked along with the bending of the wall of a tooth root canal in the using process, a plastic needle can also be used after being bent to a certain angle near the root of the canal, and the Chinese patent with the name of a plastic needle for the root canal and the patent number of 200820147932.9 discloses the plastic needle for the root canal, which is convenient.

During the process of treating the root canal, the plastic needle needs to be replaced frequently, but because the inner hole at the rear part of the needle tube is too large, a flushing needle tube filled with the filling agent is discarded, the filling agent which is stored in the cavity of the flushing needle tube is nearly 0.1ml, and 1/3 filling agent which is nearly needed is discarded along with the needle, so that the filling agent is very wasted.

In addition, during the filling process, the doctor changes the flushing needle, and the filling agent occupying the inner cavity of the needle tube is taken away every time the flushing needle is changed, so that the filling agent in the needle tube is wasted.

However, there are also metallic needles, which are curved due to their different and narrow root canal passages, and thus it is relatively difficult to flush, aspirate and fill the root canal part with a metallic needle, which affects the dental treatment effect.

SUMMERY OF THE UTILITY MODEL

The technical problems to be solved by the utility model are as follows: how to design a plastic needle for a micro-residual root canal and a syringe made of the plastic needle.

The technical scheme of the utility model is as follows:

the utility model provides a little plastic needle for residual root canal, needle file including integrative injection moulding, handle and toper needle tubing, the stub end outside of needle file is equipped with the external screw thread, the needle tubing inner chamber of toper needle tubing is big end down's toper, the handle is fixed on the outer wall of needle file or toper needle tubing, the inner chamber upper portion of needle file is equipped with a bellying, the bellying links firmly together with toper needle tubing, form annular recess between the surface of bellying and the inner wall of needle file, the needle tubing inner chamber downwardly extending passes through the inner chamber of well kenozooecium intercommunication needle file of bellying.

The handle can be in a sheet shape or a boss shape with a plurality of vertical ribs.

The bulges are in the shape of a circular truncated cone with a large upper part and a small lower part.

The conical needle tube may form an angle of 30-60 deg. with the axial direction above its deformation.

The outer diameter of the small end of the conical needle tube is 0.4mm-0.7mm, the inner diameter is 0.2mm-0.5mm, and the inner diameter of the big end, namely the bulge, is 0.7mm-2.0 mm.

The utility model provides an injector, its includes above-mentioned plastic needle for little residual root pipe, little residual root pipe is with the external screw thread of plastic needle and the syringe overcoat threaded connection of syringe, and the conical head front portion of syringe is deepened to in the recess, the anterior inner wall of conical head and bellying interference fit, the conical head inner chamber of syringe and well kenozooecium intercommunication of bellying.

A gap is reserved between the front part of the conical head of the injector and the bottom of the groove.

Compared with the prior art, the conical needle tube has the technical effects that the bulge is arranged, liquid medicine (filling agent) only remains in the hollow part of the bulge and the inner cavity of the needle tube of the conical needle tube, the inner wall of the front part of the conical head is in interference fit with the bulge, the liquid medicine (filling agent) cannot enter the front part of the conical head and the outer side of the bulge, and a small amount of liquid medicine (filling agent) remains.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic view (one) of the syringe.

Fig. 3 is a schematic view (two) of the syringe.

Fig. 4 is an enlarged view of the area a in fig. 3.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments thereof.

As shown in fig. 1, a plastic needle for a micro-residual root canal comprises a needle base 11, a handle 5 and a conical needle tube 1 which are integrally injection-molded, wherein an external thread 4 is arranged outside the large end (the lower end in fig. 1) of the needle base 11, the needle tube cavity 2 of the conical needle tube 1 is in a conical shape with a small top and a large bottom, and is a liquid flow passage through which liquid medicine passes, and the handle 5 is fixed on the needle base 11 or the outer wall of the conical needle tube 1.

The upper part of the inner cavity of the needle seat 11 is provided with a convex part 3, the convex part 3 is fixedly connected with the conical needle tube 1, an annular groove 6 is formed between the outer surface of the convex part 3 and the inner wall of the needle seat 11, and the inner cavity 2 of the needle tube extends downwards to pass through the hollow part of the convex part 3 to be communicated with the inner cavity of the needle seat 11.

The handle 5 can be in a sheet shape or a boss shape with a plurality of vertical ribs.

The boss 3 is in the shape of a truncated cone with a large top and a small bottom.

The conical needle tube 1 may form an angle of 30-60 deg. with the axial direction above its deformation.

The outer diameter of the small end of the conical needle tube 1 is 0.4mm-0.7mm, the inner diameter is 0.2mm-0.5mm, and the inner diameter of the big end, namely the bulge, is 0.7mm-2.0 mm.

A syringe comprises the plastic needle for the micro residual root canal, wherein the external thread 4 of the plastic needle for the micro residual root canal is in threaded connection with a syringe jacket 91 of the syringe, the conical head front part 92 of the syringe extends into the groove 6, the inner wall of the conical head front part 92 is in interference fit with the bulge 3, and the conical head inner cavity of the syringe is communicated with the hollow part of the bulge 3.

Referring to fig. 4, the conical head front part 92 of the injector can reach the groove bottom of the groove 6, and a gap 61 is reserved between the conical head front part 92 of the injector and the groove bottom of the groove 6, so that the material can be saved.

The working principle is as follows:

when in use, the injector is assembled.

Referring to fig. 2, immediately after the start, the liquid medicine (filler) moves upward in the syringe as the piston is pushed, and the liquid medicine (filler) gradually enters the tapered cavity 94, the hollow portion of the boss 3, and the needle tube cavity 2 of the tapered needle tube 1 from the syringe and reaches the patient.

Referring to fig. 3-4, as the piston 93 is pushed to move upward, when the piston 93 contacts the lower surface of the boss 3, the liquid medicine (filler) remains only in the hollow portion of the boss 3 and the needle tube cavity 2 of the tapered needle tube 1, and a very small amount of liquid medicine remains.

Because the inner wall of the conical head front part 92 is in interference fit with the convex part 3, the liquid medicine (filling agent) cannot enter the conical head front part 92 and the outer side of the convex part 3, and the waste is avoided.

Meanwhile, when the doctor replaces the flushing needle, the filler only remains in the hollow part of the bulge part 3 and the needle tube cavity 2 of the conical needle tube 1, and remains in a very small amount.

See the prior art for additional details.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a little plastic needle for residual root pipe, includes integrative injection moulding's needle file (11), handle (5) and toper needle tubing (1), the major part end outside of needle file (11) is equipped with external screw thread (4), and needle tubing inner chamber (2) of toper needle tubing (1) are big end down's toper, and handle (5) are fixed on the outer wall of needle file (11) or toper needle tubing (1), its characterized in that: the upper part of the inner cavity of the needle seat (11) is provided with a convex part (3), the convex part (3) is fixedly connected with the conical needle tube (1), an annular groove (6) is formed between the outer surface of the convex part (3) and the inner wall of the needle seat (11), and the inner cavity of the needle tube (2) extends downwards to pass through the hollow part of the convex part (3) to be communicated with the inner cavity of the needle seat (11).

2. The plastic needle for micro residual root canal according to claim 1, wherein: the handle (5) is sheet-shaped or is in a boss shape with a plurality of vertical ribs.

3. The plastic needle for micro residual root canal according to claim 2, wherein: the protruding part (3) is in a circular truncated cone shape with a large upper part and a small lower part.

4. The plastic needle for micro residual root canal according to claim 3, wherein: the conical needle tube (1) can form an angle of 30-60 degrees with the axial direction above the deformation part.

5. The plastic needle for micro residual root canal according to claim 4, wherein: the outer diameter of the small end of the conical needle tube (1) is 0.4mm-0.7mm, the inner diameter is 0.2mm-0.5mm, and the inner diameter of the big end, namely the bulge, is 0.7mm-2.0 mm.

6. A syringe, characterized by: the plastic needle for the micro residual root canal as claimed in claim 1, wherein the external thread (4) of the plastic needle for the micro residual root canal is in threaded connection with an injector outer sleeve (91) of an injector, the conical head front part (92) of the injector is deeply arranged in the groove (6), the inner wall of the conical head front part (92) is in interference fit with the bulge part (3), and the conical head inner cavity of the injector is communicated with the hollow part of the bulge part (3).

7. The syringe of claim 6, wherein: a gap (61) is reserved between the front part (92) of the conical head of the injector and the bottom of the groove (6).