Glue injection needle with glue overflow prevention structure
Through the combined design of the horn-shaped injection cavity and the guide bevel crimping part, the problem of unstable sealing of the traditional injection needle is solved, and the reliable connection between the tooth glue heating pipe and the injection needle is achieved, which prevents tooth glue leakage and improves the stability and durability of the injection needle.
Patent Information
- Application Number
- CN202422181856.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-06
AI Technical Summary
The sealing performance of the traditional tooth glue filling needle and the tooth glue heating pipe is unstable, and it is prone to failure of sealing due to manufacturing accuracy and thermal expansion and contraction during use, resulting in leakage and unstable use of the tooth glue.
A rubber injection needle with an anti-spill structure is designed, and a combined structure of a horn-shaped rubber injection cavity, a guide inclined surface and a vertical surface crimping section is used to achieve seamless connection with the teether heating pipe and enhance sealing and stability.
It significantly improves the sealing performance and overall stability of the glue injection needle, effectively prevents tooth glue leakage, and improves the durability and reliability of the glue injection needle.
Smart Images
Figure CN223143603U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gutta-percha filling, and relates to a glue injection needle with an anti-overflow glue structure. Background Art
[0002] In the current dental material filling technology, the connection design between the gutta-percha filling glue injection needle 1' and the gutta-percha heating tube 2' is a crucial link. Traditionally, as Figure 1 shown, the connection method between the two mainly relies on directly nesting the glue injection needle sleeve 11' on the gutta-percha heating tube 2' to form a relatively simple mechanical seal structure. The basic principle of this design is to achieve the sealing effect and prevent the gutta-percha from leaking during the heating and injection processes through the tight combination between the glue injection needle sleeve 11' and the gutta-percha heating tube 2', as well as the high-precision fit during their manufacturing.
[0003] However, this sealing structure has significant limitations. First of all, its sealing performance highly depends on the bonding pressure between the glue injection needle sleeve 11' and the gutta-percha heating tube 2', as well as the accuracy of the dimensional fit between the two. Any minor deviation in manufacturing, or dimensional changes due to factors such as thermal expansion and contraction, wear, etc. during use, may have an adverse impact on the sealing effect.
[0004] More critically, when the gutta-percha is softened in the gutta-percha heating tube 2' and is ready to be extruded towards the glue injection needle, due to the sudden change in diameter from the gutta-percha heating tube 2' to the glue injection needle, the gutta-percha will be strongly extruded during the flowing process. Most of this extrusion force is transmitted to the glue injection needle sleeve 11', thereby weakening the bonding pressure between the glue injection needle sleeve 11' and the gutta-percha heating tube 2', making the originally fragile sealing structure more likely to fail.
[0005] Therefore, this traditional connection method not only requires extremely high manufacturing precision, but also faces problems such as unstable sealing performance and easy failure during use. Content of the Utility Model
[0006] The purpose of the utility model is to provide a glue injection needle with an anti-overflow glue structure, and improve the sealing performance during the use process with the gutta-percha heating cavity by improving the structure of the glue injection needle.
[0007] The purpose of the utility model is achieved through the following technical solutions:
[0008] A glue injection needle with an anti-overflow glue structure, comprising a housing and a glue injection needle tube. The glue injection needle tube is arranged on the upper end face of the housing and is in communication with the housing. A glue injection needle sleeve is arranged inside the housing. A glue injection cavity is arranged inside the glue injection needle sleeve. The lower end of the glue injection cavity is communicated with a dental adhesive heating tube, and the upper end of the glue injection cavity is communicated with the glue injection needle tube. The glue injection cavity has a trumpet-shaped structure that is narrower at the top and wider at the bottom. A connection groove for inserting the upper end of the dental adhesive heating tube is arranged at the lower end of the glue injection needle sleeve. The glue injection needle sleeve where the connection groove is close to one side of the glue injection cavity has a crimping portion.
[0009] As a further improvement of an embodiment of the present invention, wherein the side surface of the crimping portion located on one side of the glue injection cavity is a guiding inclined surface, and the guiding inclined surface is consistent with the extending direction of the inner wall of the glue injection cavity.
[0010] As a further improvement of an embodiment of the present invention, wherein the side surface of the crimping portion located on one side of the connection groove is a vertical surface.
[0011] As a further improvement of an embodiment of the present invention, wherein the glue injection needle tube is centrally arranged on the housing, and the glue injection needle sleeve is centrally arranged on the housing.
[0012] As a further improvement of an embodiment of the present invention, wherein the housing, the glue injection needle sleeve and the glue injection needle tube are integrally formed.
[0013] As a further improvement of an embodiment of the present invention, wherein an internal thread structure is arranged on the inner wall of the housing.
[0014] Adopting the above technical solution, the following beneficial effects are achieved: Through the synergistic effect of the crimping portion, the connection groove and the glue injection cavity, the dental adhesive can be smoothly and efficiently injected from the dental adhesive heating tube into the interior of the glue injection needle tube, which not only significantly enhances the sealing performance of the connection, effectively prevents the leakage of the dental adhesive, but also greatly improves the overall stability and durability of the glue injection needle. Description of the Drawings
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.
[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.
[0017] Figure 1 It is a schematic structural diagram of an existing glue injection needle in the background technology (including the gutta-percha heating tube).
[0018] Figure 2 It is a three-dimensional schematic diagram of the glue injection needle provided by the present utility model.
[0019] Figure 3 It is a schematic structural diagram of the glue injection needle provided by the present utility model.
[0020] Figure 4 It is a schematic structural diagram of the glue injection needle provided by the present utility model (including the gutta-percha heating tube)
[0021] In the figure:
[0022] 1 - Glue injection needle; 11 - Outer shell; 12 - Glue injection needle tube; 13 - Glue injection needle sleeve; 131 - Crimping part; 1311 - Guide inclined plane; 132 - Connection groove; 14 - Glue injection cavity; 2 - Gutta-percha heating tube. Specific embodiments
[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.
[0024] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.
[0025] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are usually in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the sake of easy understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the present utility model. Embodiment
[0026] See Figures 2 - 4As shown in the figure, a glue injection needle 1 with an anti-overflow glue structure includes a housing 11 and a glue injection needle tube 12. The glue injection needle tube 12 is arranged on the upper end face of the housing 11 and is seamlessly communicated with the inside of the housing 11. A glue injection needle sleeve 13 is arranged inside the housing 11, and a glue injection cavity 14 is arranged inside the glue injection needle sleeve 13. The lower end of the glue injection cavity 14 is communicated with a dental adhesive heating tube 2, and the upper end of the glue injection cavity 14 is communicated with the glue injection needle tube 12. The glue injection cavity 14 has a flared structure that is narrow at the top and wide at the bottom, which can effectively guide the flowing dental adhesive to smoothly inject into the glue injection needle tube 12, avoiding the common overflow and blockage problems in the traditional glue injection process.
[0027] A connection groove 132 for inserting the upper end of the dental adhesive heating tube 2 is provided at the lower end of the glue injection needle sleeve 13. This connection groove 132 is specifically designed for the upper end of the dental adhesive heating tube 2 to insert, which not only ensures the stability of the connection but also facilitates disassembly and maintenance. There is a crimping portion 131 on the glue injection needle sleeve 13 where the connection groove 132 is close to the glue injection cavity 14. During the flow of the dental adhesive, the above-mentioned crimping portion 131 can actively press tightly on the dental adhesive heating tube 2 to form a reliable sealing barrier, effectively preventing the leakage of the dental adhesive during heating and flowing, thus achieving the effect of active sealing.
[0028] The side surface of the crimping portion 131 located on one side of the glue injection cavity 14 is designed as a guiding inclined surface 1311, and this guiding inclined surface 1311 is ingeniously consistent with the extending direction of the inner wall of the glue injection cavity 14. In this way, the guiding inclined surface 1311 not only optimizes the flow path of the dental adhesive but also ensures that the crimping portion 131 can be evenly distributed on the dental adhesive heating tube 2 during the pressing process, further improving the sealing effect.
[0029] With the design of this guiding inclined surface 1311, the glue injection cavity 14 as a whole adopts a conical cavity structure. This design not only increases the effective conversion of thrust, making the dental adhesive flow more smoothly into the glue injection needle tube 12 during the flow process. Compared with the prior art, it also effectively avoids the reduction of pressure at the joint of the glue injection cavity 14 and the glue injection needle tube 12.
[0030] Furthermore, the side surface of the crimping portion located on one side of the connection groove 132 is designed as a vertical surface, and this design detail forms an ingenious contrast and complement with the guiding inclined surface 1311. The setting of the vertical surface ensures that the crimping portion 131 can stably fit on the dental adhesive heating tube 2 during the pressing process and will not slide or shift due to pressure changes, thereby further enhancing the reliability of the seal.
[0031] Meanwhile, the design of the vertical surface also enables the crimping part 131 to distribute pressure more evenly when stressed, avoiding damage or leakage caused by excessive local pressure. This design not only improves the stability and durability of the glue injection needle, but also allows users to rely more confidently on the performance of the glue injection needle during use, without worrying about problems such as dental adhesive leakage or poor glue injection caused by sealing issues.
[0032] In this embodiment, the glue injection needle tube 12 is centrally disposed on the upper end surface of the housing 11, and the glue injection needle sleeve 13 is centrally arranged inside the housing 11. Such a design not only makes the structure of the entire glue injection needle more compact, but also improves its overall stability and durability.
[0033] Furthermore, the housing 11, the glue injection needle sleeve 13 and the glue injection needle tube 12 adopt an integrally formed design. This design method not only simplifies the manufacturing process of the glue injection needle, but also greatly improves its overall strength and sealing performance. The integrally formed design eliminates the need for additional connecting parts or sealing parts between each part, thus avoiding problems such as dental adhesive leakage caused by loose connection or poor sealing.
[0034] In this embodiment, an internal thread structure is provided on the inner wall of the housing 11, which provides great convenience for the installation and disassembly of the glue injection needle.
[0035] Through careful design, the present utility model innovatively improves the structure of the glue injection needle sleeve 13, realizing a seamless connection between it and the dental adhesive heating tube 2. The core of this improvement lies in the coordinated action of the crimping part 131, the connection groove 132 and the injection cavity 14 with a conical cavity structure. When the dental adhesive flows along the preset direction M, these structural features jointly ensure that the dental adhesive can smoothly and efficiently flow from the dental adhesive heating tube 2 into the glue injection needle tube 12. This design not only significantly enhances the sealing performance of the connection, effectively preventing dental adhesive leakage, but also greatly improves the overall stability and durability of the glue injection needle.
[0036] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0037] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0038] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.
[0039] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A glue injection needle with an anti-overflow glue structure, comprising a housing and a glue injection needle tube. The glue injection needle tube is arranged on the upper end face of the housing and is in communication with the housing. A glue injection needle sleeve is arranged inside the housing. A glue injection cavity is arranged inside the glue injection needle sleeve. The lower end of the glue injection cavity is communicated with a gum heating tube, and the upper end of the glue injection cavity is communicated with the glue injection needle tube. It is characterized in that: The glue injection cavity has a horn-shaped structure that is narrower at the top and wider at the bottom. A connection groove for inserting the upper end of the gutta-percha heating tube is provided at the lower end of the glue injection needle sleeve, and a crimping portion is provided on the glue injection needle sleeve on the side where the connection groove is close to the glue injection cavity.
2. The glue injection needle with an anti-overflow glue structure according to claim 1, characterized in that: The side surface of the crimping portion located on one side of the glue injection cavity is a guiding inclined surface, and the guiding inclined surface is consistent with the extending direction of the inner wall of the glue injection cavity.
3. The glue injection needle with an anti-overflow glue structure according to claim 2, characterized in that: The side surface of the crimping portion located on one side of the connection groove is a vertical surface.
4. The glue injection needle with an anti-overflow glue structure according to any one of claims 1 to 3, characterized in that: The glue injection needle tube is centrally arranged on the housing, and the glue injection needle sleeve is centrally arranged on the housing.
5. The glue injection needle with an anti-overflow glue structure according to claim 4, characterized in that: The housing, the glue injection needle sleeve, and the glue injection needle tube are integrally formed.
6. The glue injection needle with an anti-overflow glue structure according to claim 1, wherein: An internal thread structure is provided on the inner wall of the housing.