Connector sealing structure

By adopting an integrated molding process and the design of an annular sealing part of the glue-injection groove in the connector seal structure, the problems of long assembly cycle, difficulty and unsolid sealing of the existing connector seal structure are solved, and the effect of simplifying assembly, reducing costs and improving sealing effect is achieved.

CN222883908UActive Publication Date: 2025-05-16SHENZHEN GVTONG ELECTRONIC TECHNOLOGY CO
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Patent Information

Application Number
CN202421388794.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-18
Publication Date
2025-05-16
Estimated Expiration
2034-06-18

AI Technical Summary

Technical Problem

The assembly cycle of the existing connector seal structure is long and difficult, and the O-ring is easily squeezed and broken, resulting in seal failure, and nut locking is required after assembly to increase costs.

Method used

A connector seal structure is designed, including wiring terminals and plastic parts. The plastic parts are formed on the outside of the wiring terminal through an integrated molding process and embedded in the groove to reduce the use of parts. The glue injection groove and an annular seal are used to achieve secondary sealing to avoid the nut locking.

Benefits of technology

The assembly process is simplified, the assembly cycle is shortened, the assembly difficulty and cost are reduced, and the sealing effect and production efficiency are improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a connector sealing structure, which comprises a wiring terminal and a plastic part, the wiring terminal comprises a first connecting part, a second connecting part and a base part, the first connecting part and the second connecting part are respectively positioned at two sides of the base part, and the outer wall of the base part is provided with a groove which is formed by inward sinking along the radial direction of the base part; the plastic part is integrally formed on the outer side of the wiring terminal, the plastic part wraps the outer wall of the base part, and a part of the plastic part is embedded into the groove. According to the design, the wiring terminal is placed in the mold, then the plastic part is formed on the outer side of the wiring terminal through the integrated forming process, and a part of the plastic part is embedded into the groove, so that the combination area of the plastic part and the wiring terminal is increased, the wiring terminal and the plastic part are connected in a sealed mode, the wiring terminal can be limited, and the service life of the wiring terminal is prolonged. Therefore, the wiring terminal can be fixed in the plastic part, subsequent insertion and assembly are not needed, the use of parts is reduced, and the research and development cost and the assembly time are reduced.
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Description

Technical Field

[0001] The utility model relates to the technical field of connectors, and more specifically to a connector sealing structure. Background Art

[0002] With the development of science and technology and the improvement of living standards, people's demand for electronic products is becoming increasingly strong. Electrical connectors are widely used in power systems, communication networks, financial manufacturing, elevators, industrial automation, medical equipment, office equipment, home appliances, military manufacturing, automotive and other industries. They are mainly used to connect electronic products or signal transmission between components in electronic products.

[0003] Traditional connectors such as Figure 1 As shown, the connector generally includes a terminal and a plastic part wrapped outside the terminal. The terminal and the plastic part are sealed by a metal bushing, a plurality of O-rings and a fastening nut. However, after long-term use, it is found that this assembly method has the following defects and shortcomings:

[0004] a. The connector has many sealing assembly parts, which leads to a long assembly cycle;

[0005] b. The plastic parts of the connector are difficult to assemble with other parts after injection molding, making assembly difficult;

[0006] c. The O-ring is easily squeezed during assembly, resulting in sealing failure;

[0007] d. Nuts need to be tightened after assembly, which increases assembly costs and tooling equipment. Utility Model Content

[0008] In order to overcome the deficiencies of the prior art, the utility model provides a connector sealing structure to solve the problem of high production cost of the prior connector.

[0009] The technical solution of the utility model is as follows: A connector sealing structure, comprising:

[0010] A terminal block, the terminal block comprising a first connection portion, a second connection portion and a base portion, the first connection portion and the second connection portion are respectively located on two sides of the base portion, and an outer wall of the base portion is provided with a groove formed by being recessed radially inwardly along the base portion;

[0011] A plastic part is integrally formed on the outer side of the connecting terminal, the plastic part surrounds the outer wall of the base, and a part of the plastic part is embedded in the groove.

[0012] Furthermore, a glue injection groove is provided in the plastic part, the first connection portion passes through the glue injection groove and extends and protrudes outward, and the diameter of the first connection portion is smaller than the diameter of the glue injection groove.

[0013] Furthermore, an arcuate transition surface is provided at the connection between the first connecting portion and the base, and the plastic part is correspondingly provided with an annular clamping protrusion, the inner wall of the annular clamping protrusion is in contact with the arcuate transition surface, and the annular clamping protrusion protrudes outward along the axial direction of the first connecting portion to form an annular sealing portion, the inner surface of the annular sealing portion is in contact with the first connecting portion, and the outer surface of the annular sealing portion is an inclined surface inclined outward along the radial direction of the annular sealing portion.

[0014] Furthermore, the first connecting portion, the base portion and the second connecting portion are an integral structure.

[0015] Further, the diameter of the first connecting portion is smaller than the diameter of the base portion.

[0016] Further, the diameter of the second connecting portion is smaller than the diameter of the base portion, and the diameter of the second connecting portion is smaller than the diameter of the first connecting portion.

[0017] Furthermore, the plastic part includes a main body and a mounting portion formed by extending and protruding outward from the main body, the main body surrounds at least a portion of the wiring terminal, and the mounting portion is provided with a mounting hole that penetrates the thickness of the mounting portion.

[0018] Furthermore, a metal bushing is provided in the mounting hole.

[0019] Further, the base includes a first convex portion and a second convex portion, and a gap between the first convex portion and the second convex portion forms the groove.

[0020] Furthermore, the groove is annularly arranged around the outer wall of the base.

[0021] The utility model according to the above scheme has the following beneficial effects:

[0022] (1) The utility model provides a connector sealing structure, including a terminal and a plastic part, wherein the terminal includes a first connection part, a second connection part and a base, wherein the first connection part and the second connection part are respectively located on both sides of the base, and the outer wall of the base is provided with a groove formed by radially inward depression along the base; the plastic part is integrally formed on the outer side of the terminal, the plastic part surrounds the outer wall of the base, and a part of the plastic part is embedded in the groove. In this design, the terminal is placed in the mold, and then a plastic part is formed on the outer side of the terminal through an integral molding process, and a part of the plastic part is embedded in the groove, thereby increasing the bonding area between the plastic part and the terminal, not only achieving a sealed connection between the terminal and the plastic part, but also limiting the terminal, so that the terminal can be fixed in the plastic part without subsequent insertion and assembly; reducing the use of components (two O-rings, bushings), shortening the assembly cycle, and at the same time reducing the difficulty of assembly, reducing R&D costs and assembly time, and saving labor costs.

[0023] (2) The utility model provides a connector sealing structure, wherein a glue injection groove is provided in a plastic part, a first connection part extends outward through the glue injection groove, and the diameter of the first connection part is smaller than the diameter of the glue injection groove. After the terminal block is placed in a mold and a plastic part is formed on the outside of the terminal block through an integrated molding process, it is only necessary to inject glue into the glue injection groove so that the glue fills the gap between the first connection part and the inner wall of the glue injection groove to achieve secondary sealing, without the need to lock the seal with a nut, thereby further reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of an existing connector;

[0026] Figure 2 This is a schematic diagram of a three-dimensional structure of a connector sealing structure in an embodiment of the utility model;

[0027] Figure 3 This is one of the cross-sectional views of a connector sealing structure in an embodiment of the utility model;

[0028] Figure 4 for Figure 3 A local enlarged schematic diagram;

[0029] Figure 5It is a schematic diagram of the structure of the wiring terminal in the embodiment of the utility model;

[0030] Figure 6 This is a second cross-sectional view of a connector sealing structure in an embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of the structural decomposition of a connector sealing structure in an embodiment of the utility model.

[0032] In the figure, 1, terminal; 11, first connecting part; 111, arc-shaped transition surface; 12, base; 121, groove; 122, first convex part; 123, second convex part; 13, second connecting part; 2, plastic part; 2a, main body; 2b, mounting part; 21, glue injection groove; 22, annular clamping protrusion; 221, annular sealing part; 2211, inclined surface; 23, mounting hole; 3, metal bushing; 4, O-ring; 5, fastening nut. DETAILED DESCRIPTION

[0033] The following detailed description and drawings of the embodiments of the present invention are used to illustrate the principle of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the embodiments described.

[0034] In order to better understand the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0035] See also Figure 2 As shown, a connector sealing structure provided by an embodiment of the utility model includes a wiring terminal 1 and a plastic part 2, the wiring terminal 1 includes a first connecting part 11, a second connecting part 13 and a base 12, the first connecting part 11 and the second connecting part 13 are respectively located on both sides of the base 12, and the outer wall of the base 12 is provided with a groove 121 formed by radially inward depression along the base 12; the plastic part 2 is integrally formed on the outer side of the wiring terminal 1, the plastic part 2 surrounds the outer wall of the base 12, and a part of the plastic part 2 is embedded in the groove 121. With this design, the terminal block 1 is placed in the mold, and then a plastic part 2 is formed on the outside of the terminal block 1 through an integrated molding process, and a portion of the plastic part 2 is embedded in the groove 121, thereby increasing the bonding area between the plastic part 2 and the terminal block 1. This not only enables a sealed connection between the terminal block 1 and the plastic part 2, but also enables the terminal block 1 to be limited in position, so that the terminal block 1 can be fixed in the plastic part 2 without subsequent insertion and assembly. This reduces the use of components (two O-rings, bushings), shortens the assembly cycle, and reduces the difficulty of assembly, reduces R&D costs and assembly time, and saves labor costs.

[0036] See also Figure 3As shown, a glue injection groove 21 is provided in the plastic part 2, and the first connection part 11 extends outward through the glue injection groove 21, and the diameter of the first connection part 11 is smaller than the diameter of the glue injection groove 21. When the terminal 1 is placed in the mold, and the plastic part 2 is formed on the outside of the terminal 1 through an integrated molding process, it is only necessary to inject glue into the glue injection groove 21 so that the glue fills the gap between the first connection part 11 and the inner wall of the glue injection groove 21 to achieve secondary sealing, without the need to lock the seal with a nut, further reducing the production cost.

[0037] See also Figure 4-5 As shown, the connection between the first connection part 11 and the base part 12 is provided with an arc-shaped transition surface 111, and the plastic part 2 is correspondingly provided with an annular clamping protrusion 22, the inner wall of the annular clamping protrusion 22 is in contact with the arc-shaped transition surface 111, and the annular clamping protrusion 22 protrudes outward along the axial direction of the first connection part 11 with an annular sealing part 221, the inner surface of the annular sealing part 221 is in contact with the first connection part 11, and the outer surface of the annular sealing part 221 is an inclined surface 2211 inclined outward along the radial direction of the annular sealing part 221. This design expands the bonding area of ​​the plastic part 2 and the wiring terminal 1, not only realizing a sealed connection between the wiring terminal 1 and the plastic part 2, but also limiting the wiring terminal 1, so that the wiring terminal 1 can be fixed in the plastic part 2 without the need for subsequent insertion and assembly, which greatly simplifies the assembly process and improves production efficiency.

[0038] Preferably, the first connecting portion 11, the base portion 12 and the second connecting portion 13 are an integral structure.

[0039] Preferably, the diameter of the first connection portion 11 is smaller than the diameter of the base portion 12. In this embodiment, the diameter of the second connection portion 13 is smaller than the diameter of the base portion 12, and the diameter of the second connection portion 13 is smaller than the diameter of the first connection portion 11.

[0040] Preferably, the plastic part 2 includes a main body 2a and a mounting part 2b formed by extending and protruding outward from the main body 2a, the main body 2a surrounds at least a portion of the terminal block 1, and the mounting part 2b is provided with a mounting hole 23 that penetrates the thickness of the mounting part 2b. In this embodiment, the plastic part 2 is mounted to the panel of the chassis through the mounting hole 23.

[0041] Without taking additional measures, when the screw is directly screwed into the mounting hole 23 for installation, the force-bearing surface of the screw will directly act on the inner wall of the mounting hole 23. Due to various factors such as material strength and screw tightening force, the mounting portion 2b is prone to cracking, thereby affecting the overall structure of the plastic part 2. Based on this, see Figure 6-7As shown, the mounting hole 23 in this embodiment is provided with a metal bushing 3. By overmolding the metal bushing 3 in the mounting hole 23, the force-bearing surface of the screw no longer directly acts on the inner wall of the mounting hole 23 of the mounting portion 2b, but acts on the stronger and stronger metal bushing 3, which greatly reduces the risk of cracking of the mounting portion 2b due to excessive local force. Secondly, the metal bushing 3 itself has high wear resistance and corrosion resistance, and can maintain good performance even in long-term use or harsh environments, which helps to extend the service life of the connector and reduce the maintenance and replacement costs caused by damage to the mounting hole 23. It is worth mentioning that due to the presence of the metal bushing 3, the screw is easy to screw in during the installation process, reducing the risk of damaging the mounting hole 23 due to improper operation during the installation process.

[0042] See also Figure 5 As shown, the base 12 includes a first protrusion 122 and a second protrusion 123, and the gap between the first protrusion 122 and the second protrusion 123 forms a groove 121. In this embodiment, the groove 121 is annularly arranged on the outer wall of the base 12. The groove 121 and the plastic part 2 cooperate to limit the terminal 1. Such a design will not increase the production cost, but also enhance the connection firmness between the terminal 1 and the plastic part 2, thereby preventing the risk of the terminal 1 falling off.

[0043] It should be noted that the indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the application product is usually placed when used, or is the orientation or position relationship commonly understood by technical personnel in this field, or is the orientation or position relationship in which the application product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0044] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

[0045] The above is an exemplary description of the utility model patent in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model patent is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the utility model patent, or the concept and technical solution of the utility model patent are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A connector sealing structure, characterized in that: include: A wiring terminal (1), the wiring terminal (1) comprising a first connection portion (11), a second connection portion (13) and a base portion (12), the first connection portion (11) and the second connection portion (13) being respectively located on two sides of the base portion (12), and the outer wall of the base portion (12) being provided with a groove (121) which is recessed radially inwardly along the base portion (12); A plastic part (2), the plastic part (2) being integrally formed on the outer side of the connecting terminal (1), the plastic part (2) surrounding the outer wall of the base (12), and a part of the plastic part (2) being embedded in the groove (121).

2. A connector sealing structure according to claim 1, characterized in that: A glue injection groove (21) is provided in the plastic part (2), the first connection portion (11) passes through the glue injection groove (21) and extends outwardly, and the diameter of the first connection portion (11) is smaller than the diameter of the glue injection groove (21).

3. A connector sealing structure according to claim 2, characterized in that: An arcuate transition surface (111) is provided at the connection between the first connecting portion (11) and the base portion (12), and the plastic part (2) is correspondingly provided with an annular clamping protrusion (22), the inner wall of the annular clamping protrusion (22) is in contact with the arcuate transition surface (111), and the annular clamping protrusion (22) is provided with an annular sealing portion (221) protruding outwardly along the axial direction of the first connecting portion (11), the inner surface of the annular sealing portion (221) is in contact with the first connecting portion (11), and the outer surface of the annular sealing portion (221) is an inclined surface (2211) inclined outwardly along the radial direction of the annular sealing portion (221).

4. A connector sealing structure according to claim 1, characterized in that: The first connecting portion (11), the base portion (12) and the second connecting portion (13) are an integral structure.

5. A connector sealing structure according to claim 1, characterized in that: The diameter of the first connecting portion (11) is smaller than the diameter of the base portion (12).

6. A connector sealing structure according to claim 1, characterized in that: The diameter of the second connecting portion (13) is smaller than the diameter of the base portion (12), and the diameter of the second connecting portion (13) is smaller than the diameter of the first connecting portion (11).

7. A connector sealing structure according to claim 1, characterized in that: The plastic part (2) comprises a main body (2a) and a mounting part (2b) formed by extending and protruding outward from the main body (2a), the main body (2a) surrounds at least a portion of the wiring terminal (1), and the mounting part (2b) is provided with a mounting hole (23) that penetrates the thickness of the mounting part (2b).

8. A connector sealing structure according to claim 7, characterized in that: A metal bushing (3) is arranged in the mounting hole (23).

9. A connector sealing structure according to claim 1, characterized in that: The base (12) includes a first convex portion (122) and a second convex portion (123), and a gap between the first convex portion (122) and the second convex portion (123) forms the groove (121).

10. A connector sealing structure according to claim 9, characterized in that: The groove (121) is arranged in an annular shape around the outer wall of the base (12).