Needle for injecting fluid resin and injector

Abstract

The utility model discloses a needle for fluid resin injection, which relates to the technical field of medical instruments and comprises a needle tube, a necking portion is arranged at the outlet end of the needle tube, a plurality of side seams extending to a port of the necking portion are arranged on the lateral side of the needle tube, and the side seams are evenly distributed on the lateral side of the needle tube. The utility model also discloses an injector, which comprises a needle for injecting fluid resin, a needle cylinder and a piston push handle, and the needle tube is connected with the needle cylinder. According to the needle head and the injector for injecting the fluid resin, the extruded fluid resin can flow out from the end opening and the side seam of the necking part, the hidden danger that the end part of the needle head tube rubs the wall of the guide plate to bring in foreign matters when the end part of the needle head tube is in place on the guide plate is prevented, and the needle head and the injector have the beneficial effects of being smooth in injection and improving the repairing quality.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a needle and a syringe for injecting fluid resin. Background Art

[0002] With the promotion of fluid resins in dentistry, the use of fluid resins for direct tooth restoration has become a relatively mature technology. Using 3D printed guides for fluid resin injection can effectively solve the problems of direct resin restoration technology, which is difficult, time-consuming, and difficult to achieve high-precision restoration.

[0003] In the prior art, during the process of using a guide plate to assist injection, the resin injection needle is first inserted into the guide plate, and then the piston push handle is pushed to squeeze out the fluid resin. However, the end of a conventional fluid resin injection needle is easily attached to the tooth surface, resulting in the end of the resin injection needle being blocked, which is not conducive to smooth injection. At the same time, the end of the resin injection needle is easily in contact with the guide plate. During the contact process, the friction between the end of the resin injection needle and the guide plate will cause foreign matter to accumulate in the resin injection needle, causing it to be blocked, making it difficult to push out the resin, and foreign matter may also be brought in, resulting in a decrease in the quality of the restoration.

[0004] Therefore, the prior art needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the resin injection needle in the prior art is prone to difficulty in pushing out the resin, which reduces the quality of the restoration. The utility model aims to provide a needle and syringe for fluid resin injection, which adopt corresponding technical means and have the beneficial effects of smooth injection and improved restoration quality.

[0006] The utility model is realized by the following technical solutions:

[0007] In a first aspect, the utility model provides a needle for fluid resin injection, comprising a needle tube, wherein the outlet end of the needle tube is provided with a necking portion, and the side of the needle tube is provided with a side seam extending to the port of the necking portion, and a plurality of the side seams are evenly distributed on the side of the needle tube.

[0008] In the above technical solution, the needle tube is the main structure of the needle for fluid resin injection, and the cavity formed by the needle tube is the delivery lumen, which is the channel for delivering fluid resin. The outlet end of the needle tube is equipped with a narrowed necking part, which is in the shape of a hemisphere with a flat outer end. The port of the necking part is the main channel for the fluid resin to flow out of the delivery lumen; the side seam is a strip-shaped crack on the needle tube and the necking part, and the side seam is an auxiliary channel for the fluid resin to flow out of the delivery lumen. When the port of the necking part is blocked, the fluid resin can flow out from the side seam to ensure smooth injection.

[0009] Furthermore, in the present invention, the outer wall of the necking portion is an arc surface.

[0010] Furthermore, in the present invention, the area of ​​the side seam is the same as the area of ​​the necking port.

[0011] Furthermore, in the present invention, the area of ​​the port of the necked portion is half of the area of ​​the cross section of the needle tube.

[0012] Furthermore, in the present invention, the needle tube is configured as a hard needle tube, and the necking portion is configured as a hard necking portion or a flexible necking portion.

[0013] Furthermore, in the present invention, the flexible necking portion is configured as a latex flexible necking portion.

[0014] Furthermore, in the present invention, the cross-sections of the needle tube and the necked portion are both concentric circles.

[0015] Furthermore, in the present invention, the number of the side seams is 3 to 6.

[0016] In a second aspect, the utility model also provides a syringe, which includes a needle for injecting fluid resin, a syringe and a piston push handle, wherein the needle tube is connected to the syringe.

[0017] In the above technical solution, the syringe includes a needle for injecting fluid resin, a syringe and a piston push handle. The piston push handle is installed in the syringe, and the needle for injecting fluid resin is connected to the syringe. The piston push handle is pushed to extrude the fluid resin, and the fluid resin can flow out from the port and the side seam of the necking part.

[0018] Furthermore, in the present invention, the needle tube is threadably connected to the syringe, and the surface of the needle tube is provided with anti-slip grooves.

[0019] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0020] The utility model provides a needle for fluid resin injection, comprising a needle tube and a constricted portion connected to each other. The port of the constricted portion is the main channel for the fluid resin to flow out of the delivery tube cavity; the side seam is an auxiliary channel for the fluid resin to flow out of the delivery tube cavity. When the port of the constricted portion fits the tooth surface, the resin can flow out from the side seam, reducing the pressure during resin injection and improving the smoothness of the operation. Since the narrowed constricted portion is in a hemispherical shape with a flat outer end, it not only ensures the close fit between the needle tube and the guide plate, preventing the resin from overflowing from the gap between the guide plate and the needle tube during injection, but also prevents the hidden danger of foreign matter being introduced by rubbing against the guide plate wall when the end of the needle tube is in place on the guide plate, thereby improving the quality of repair.

[0021] The utility model also provides a syringe, which includes a needle for injecting fluid resin, a syringe and a piston push handle. The piston push handle is installed in the syringe, and the needle for injecting fluid resin is connected to the syringe. The piston push handle is moved to extrude the fluid resin, and the fluid resin can flow out from the port and the side seam of the necking part. The overall structure is simple, and the process of pushing the fluid resin is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a needle for fluid resin injection according to the utility model;

[0024] Figure 2 The utility model is a schematic diagram of a needle for injecting fluid resin.

[0025] The marks and corresponding parts names in the accompanying drawings are: 1-needle tube, 2-neck part, 3-side seam, 4-guide plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0027] The following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the embodiments of the present invention, "multiple" means at least 2.

[0030] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Example 1

[0032] This embodiment 1 provides a needle for injecting fluid resin, such as Figure 1-Figure 2 As shown, the specific structure is described as follows.

[0033] Combination Figure 1 As shown, the needle for fluid resin injection in this embodiment mainly consists of a needle tube 1 and a constricted portion 2, wherein the needle tube 1 can be made of plastic or metal. The needle tube 1 is cylindrical, and the cavity formed by the needle tube 1 is a delivery lumen, which is a channel for delivering fluid resin.

[0034] Further, combined with Figure 1 As shown, the needle tube 1 is equipped with a narrowed necking portion 2, which is in the shape of a hemisphere with a vertically cut outer end, and the outer surface of the necking portion 2 is an arc surface. The right end of the necking portion 2 is fixedly connected to the left outlet end of the needle tube 1, and the cross-sectional area of ​​the necking portion 2 gradually decreases from right to left to form a necking. The port of the necking portion 2 is the main channel for the fluid resin to flow out of the delivery tube cavity.

[0035] Please refer to Figure 1 As shown, the side seam 3 is a strip-shaped crack on the needle tube 1 and the necking part 2. The side seam 3 extends from the side wall of the needle tube 1 to the necking part 2. The side seam 3 is an auxiliary channel for the fluid resin to flow out of the delivery tube cavity. When the port of the necking part 2 is blocked, the fluid resin can flow out from the side seam 3 to ensure smooth injection.

[0036] In some implementations of this embodiment, the cross-sections of the needle tube 1 and the necking portion 2 are both concentric circles, and the area of ​​the port of the necking portion 2 is half the cross-sectional area of ​​the delivery lumen of the needle tube 1. Figure 1 and Figure 2 As shown, the end of the necked portion 2 is located at the center of the guide plate 4 and does not contact the inner wall of the guide plate 4, thereby preventing the end of the needle tube 1 from rubbing against the wall of the guide plate 4 and bringing in foreign matter during the process of being positioned on the guide plate 4.

[0037] like Figure 1As shown, in this embodiment, four side seams 3 are provided (three, six side seams 3, etc. may also be provided in other embodiments), and the four side seams 3 are evenly distributed on the side of the needle tube 1. The area of ​​the four side seams 3 is the same as the area of ​​the port of the necking portion 2, and thus the area of ​​the fluid resin flowing out of the necking portion 2 and the side seams 3 is the same as the delivery area of ​​the delivery lumen, and there is no need to add force or unload force during the process of pushing the fluid resin, and the pushing is very smooth.

[0038] In some implementations of this embodiment, the needle tube 1 is a hard needle tube 1 made of plastic or metal, which has a certain strength to avoid bending or collapse during use. The necking portion 2 can be a hard necking portion 2 made of the same material as the hard needle tube 1, or a flexible necking portion 2, which is soft and will not affect the tooth surface.

[0039] Furthermore, the flexible necking part 2 is made of latex material, which is non-toxic and harmless and will not affect the tooth surface. In order to ensure that the end of the flexible necking part 2 is deformed, a metal ring can be embedded inside the end of the flexible necking part 2 to achieve a better effect of outputting the fluid resin.

[0040] Example 2

[0041] In the second aspect, the utility model also provides a syringe, which includes a needle for injecting fluid resin, a syringe and a piston push handle, and the needle tube 1 is connected to the syringe. The syringe includes a needle for injecting fluid resin, a syringe and a piston push handle, and the piston push handle is installed in the syringe, and the needle for injecting fluid resin is connected to the syringe. Pushing the piston push handle squeezes out the fluid resin, and the fluid resin can flow out from the port of the necking part 2 and the side seam 3.

[0042] The above-mentioned needle tube 1 is threadedly connected to the syringe, which has the advantage of easy installation and disassembly. The outer surface of the connection between the needle tube 1 and the syringe is provided with anti-slip patterns, such as mesh anti-slip patterns, which increase friction and make it convenient to twist the needle tube 1 by hand, thereby facilitating installation and disassembly.

[0043] The working principle of the needle and syringe for fluid resin injection of the utility model is as follows:

[0044] Combination Figure 1 and Figure 2 As shown, when the port of the necking portion 2 fits the tooth surface, the resin can flow out from the side seam 3, reducing the pressure during resin injection and improving the smoothness of the operation. Since the narrow necking portion 2 is in the shape of a hemisphere with a flat outer end, it not only ensures the close fit between the needle tube 1 and the guide plate 4, preventing the resin from overflowing from the gap between the guide plate 4 and the needle tube 1 during injection, but also prevents the hidden danger of foreign matter being brought in by the end of the needle tube 1 rubbing against the wall of the guide plate 4 during the process of being in place on the guide plate 4, thereby improving the quality of restoration.

[0045] In summary, the utility model provides a needle for fluid resin injection, which includes a needle tube 1, a necking portion 2 is provided at the outlet end of the needle tube 1, and a side seam 3 extending to the port of the necking portion 2 is provided on the side of the needle tube 1, and a plurality of side seams 3 are evenly distributed on the side of the needle tube 1. The outer wall of the necking portion 2 is an arc surface. The area of ​​the side seam 3 is the same as the area of ​​the port of the necking portion 2. The area of ​​the port of the necking portion 2 is half the area of ​​the cross section of the needle tube 1. The needle tube 1 is configured as a hard needle tube 1, and the necking portion 2 is configured as a hard necking portion 2 or a flexible necking portion 2. The flexible necking portion 2 is configured as a latex flexible necking portion 2. The cross sections of the needle tube 1 and the necking portion 2 are both concentric circles. The number of side seams 3 is 3 to 6. The utility model also provides a syringe, which includes a needle for fluid resin injection, and also includes a syringe and a piston push handle, and the needle tube 1 is connected to the syringe. The needle tube 1 is threadedly connected to the syringe, and the surface of the needle tube 1 is provided with anti-slip grooves. Therefore, the needle and syringe for fluid resin injection provided by the utility model have the beneficial effects of smooth injection and improved repair quality.

[0046] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A needle for fluid resin injection, characterized in that: The invention comprises a needle tube (1), wherein the outlet end of the needle tube (1) is provided with a necking portion (2), and the side surface of the needle tube (1) is provided with a side seam (3) extending to the end of the necking portion (2), and a plurality of the side seams (3) are evenly distributed on the side surface of the needle tube (1).

2. The needle for fluid resin injection according to claim 1, characterized in that: The outer wall of the necking portion (2) is an arc surface.

3. The needle for fluid resin injection according to claim 1, characterized in that: The area of ​​all the side seams (3) is the same as the area of ​​the port of the necking portion (2).

4. The needle for fluid resin injection according to claim 3, characterized in that: The area of ​​the port of the necked portion (2) is half the area of ​​the cross section of the needle tube (1).

5. The needle for fluid resin injection according to claim 1, characterized in that: The needle tube (1) is configured as a hard needle tube (1), and the necking portion (2) is configured as a hard necking portion (2) or a flexible necking portion (2).

6. The needle for fluid resin injection according to claim 5, characterized in that: The flexible necking portion (2) is configured as a latex flexible necking portion (2).

7. The needle for fluid resin injection according to claim 1, characterized in that: The cross sections of the needle tube (1) and the necked portion (2) are both concentric circles.

8. The needle for fluid resin injection according to claim 1, characterized in that: The number of the side seams (3) is 3 to 6.

9. A syringe, characterized in that: It comprises a needle for fluid resin injection as claimed in any one of claims 1 to 8, and also comprises a syringe and a piston push handle, wherein the needle tube (1) is connected to the syringe.

10. The syringe according to claim 9, characterized in that The needle tube (1) is threadably connected to the syringe, and the surface of the needle tube (1) is provided with anti-slip grooves.

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