A wire insertion terminal structure which is easy to dress but difficult to remove

Abstract

This utility model discloses a plug terminal structure that is easy to install but difficult to remove, including a terminal 1, a rubber sleeve 2, and a housing 3. The tail of the terminal 1 is riveted to the wire 4. An elastic steel clip 5 is fitted onto the terminal 1. By inserting the front end of the terminal 1 into the plug hole 21 of the rubber sleeve 2, the elastic steel clip 5 is used to lock and fix it in place. The rubber sleeve 2 is placed in a mold, and the housing 3 is formed by injection molding, thus fixing the terminal 1 to the rubber sleeve 2 and the housing 3. By fitting the elastic steel clip 5 onto the terminal 1, and using the elastic steel clip 5 to expand and form an inverted structure after the terminal 1 is inserted into the rubber sleeve 2, the terminal 1 is limited within the rubber sleeve 2. Then, a housing 3 is formed on the outside of the rubber sleeve 2 by in-mold injection molding. This method reduces the number of assembly parts and increases assembly efficiency.

Description

Technical fields:

[0001] This utility model relates to the field of connector technology, and specifically to a plug terminal structure that is easy to install but difficult to remove. Background technology:

[0002] A connector is essentially a bridging device used for efficiently connecting electronic circuits. It mainly consists of conductive terminals (contacts), an insulating body, and a housing. The terminals establish an electrical connection path, transmitting current or signals; the insulating body secures the terminals and provides reliable electrical isolation; the housing provides mechanical protection, connection guidance, and locking functions. Its core value lies in enabling separable connections within or between devices, thereby greatly simplifying the manufacturing and assembly process of electronic products, facilitating subsequent maintenance and repair, and supporting modular design and future upgrades. It is an indispensable key component of modern electronic equipment.

[0003] Chinese utility model patent CN 211455968 U discloses a connector with a parallel terminal structure, comprising a connector body. The connector body has a partition surface with linearly distributed wire holes. Above the wire holes, the connector body has corresponding terminal slots. Above the terminal slots is a recess, and below the partition surface is a second recess. Wire 1 is inserted into the first recess, and wire 2 is inserted into the second recess and the wire holes. The conductor portions of the inserted ends of wire 1 and wire 2 are connected by a parallel terminal. Adhesive is injected into the first recess to form a sealing and fixing component, achieving sealing and fixing of wire 1, wire 2, and the parallel terminal. This provides good waterproofing and fastening effects, effectively improving the connector's insertion and removal performance. The method of sealing the parallel terminal with adhesive directly achieves the connection between the two wire conductors, offering advantages such as simple structure, small size, and low cost.

[0004] However, in the aforementioned patent, the wire is fixed by inserting it into the wire hole of the connector body and then injecting glue to form a sealing fastener. This process is cumbersome, inefficient, time-consuming, and costly.

[0005] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a plug terminal structure that is easy to install but not easy to remove.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a plug terminal structure that is easy to install but not easy to remove, comprising: a terminal, a rubber sleeve and a housing, the tail of the terminal being riveted to the wire, and an elastic steel clip being fitted onto the terminal. By inserting the front end of the terminal into the plug hole of the rubber sleeve, the elastic steel clip is used to fix the terminal in place. The rubber sleeve is placed into a mold and the housing is formed by injection molding, thereby fixing the terminal to the rubber sleeve and the housing.

[0008] Furthermore, in the above technical solution, the elastic rigid clamp is a conical ring, and the side wall of the conical ring is provided with a groove for generating contraction deformation.

[0009] Furthermore, in the above technical solution, the terminal is provided with a first retaining ring groove for mounting the elastic rigid clip, and the front end of the first retaining ring groove is provided with a first cone portion to facilitate the installation of the elastic rigid clip.

[0010] Furthermore, in the above technical solution, the rear end of the terminal is provided with a connection hole for inserting a wire, and the outer wall of the terminal is also provided with a detection hole that vertically connects to the connection hole.

[0011] Furthermore, in the above technical solution, the rubber sleeve is provided with a plurality of insertion holes for terminals to be inserted, and the inner wall of the insertion hole is provided with a first inner protruding ring for locking the terminal.

[0012] Furthermore, in the above technical solution, the outer wall of the rubber sleeve has an outer groove for fixing with the shell, and after the shell is integrally injection molded, its inner wall is formed with a second inner convex ring that matches and engages with the outer groove.

[0013] Furthermore, in the above technical solution, the housing includes a sleeve portion integrally injection molded on the outer wall of the rubber sleeve, a mounting portion formed on the outer wall of the sleeve portion for docking and fixing, a plurality of mounting holes provided on the mounting portion, and a rubber-coated block formed inside the rubber sleeve for wrapping and fixing the terminal and the elastic rigid clip.

[0014] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: In the present invention, an elastic rigid clip is installed on the terminal. After the terminal is inserted into the rubber sleeve, the elastic rigid clip expands to form an inverted structure, which limits the terminal in the rubber sleeve. Then, a shell is formed on the outside of the rubber sleeve by in-mold injection molding. The number of assembly parts is small and the assembly efficiency is high. Attached image description:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the present invention;

[0017] Figure 3This is a perspective view of the elastic rigid clamp in this utility model;

[0018] Figure 4 This is a cross-sectional view of the rubber sleeve in this utility model;

[0019] Figure 5 This is a perspective view of the terminal block in this utility model. Detailed implementation method:

[0020] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0021] See Figures 1 to 5 The diagram illustrates a connector structure that is easy to install but difficult to remove. It includes a terminal 1, a sleeve 2, and a housing 3. The tail of the terminal 1 is riveted to a wire 4. A flexible snap-fit ​​5 is fitted onto the terminal 1. By inserting the front end of the terminal 1 into the insertion hole 21 of the sleeve 2, the flexible snap-fit ​​5 secures the terminal 1 in place. The sleeve 2 is then placed in a mold, and the housing 3 is formed through injection molding, thus fixing the terminal 1 to the sleeve 2 and the housing 3. By fitting the flexible snap-fit ​​5 onto the terminal 1, which expands after the terminal 1 is inserted into the sleeve 2 to form an inverted structure, the terminal 1 is confined within the sleeve 2. Finally, the housing 3 is formed on the outside of the sleeve 2 through in-mold injection molding. This method reduces the number of assembly parts and increases assembly efficiency.

[0022] The elastic clip 5 is a conical ring, and the side wall of the conical ring is provided with a slot 51 for generating contraction deformation. By making the elastic clip 5 conical, it is not only convenient to fasten the elastic clip 5 onto the terminal 1, but also convenient to insert the terminal 1 into the wire insertion hole 13 of the terminal 1, so as to achieve quick snap-fit.

[0023] The terminal 1 is provided with a first retaining ring groove 11 for mounting the elastic steel clip 5. The front end of the first retaining ring groove 11 is provided with a first cone portion 12 to facilitate the installation of the elastic steel clip 5. By providing the first cone portion 12 at the front end of the first retaining ring groove 11, the installation of the elastic steel clip 5 is guided, so that the elastic steel clip 5 can be quickly fitted onto the terminal 1, and the first cone portion 12 can prevent the elastic steel clip 5 from coming off the terminal 1, thereby limiting the position of the elastic steel clip 5.

[0024] The rear end of the terminal 1 is provided with a connection hole 13 for inserting the wire 4, and the outer wall of the terminal 1 is also provided with a detection hole 14 that is vertically connected to the connection hole 13. The detection hole 14 can quickly detect whether the wire 4 is inserted into the terminal 1, ensuring the stability of the wire 4 when riveted to the terminal 1, and ensuring the stable electrical connection when the connector is in use.

[0025] The sleeve 2 is provided with several insertion holes 21 for inserting terminals 1, and the inner wall of the insertion holes 21 is provided with a first inner protruding ring 22 for locking the terminals 1. The outer wall of the sleeve 2 has an outer groove 23 for forming and fixing with the housing 3, and after the housing 3 is integrally injection molded, its inner wall is formed with a second inner protruding ring 30 that matches and locks into the outer groove 23. By providing the first inner protruding ring 22 in the insertion holes 21, the first inner protruding ring 22 is used to barb and lock the elastic steel clip 5, so that the terminals 1 are locked after being inserted into the insertion holes 21 of the sleeve 2 and cannot be pulled out, thereby realizing the quick assembly of the terminals 1 and the sleeve 2. Secondly, by providing the outer groove 23 on the outer wall of the sleeve 2, the outer groove 23 is used to form the second inner protruding ring 30 on the inner wall of the housing 3 during injection molding, and the outer groove 23 and the second inner protruding ring 30 cooperate to achieve a stable connection between the sleeve 2 and the housing 3.

[0026] The housing 3 includes a sleeve portion 31 integrally injection molded on the outer wall of the sleeve 2, a mounting portion 32 formed on the outer wall of the sleeve portion 31 for docking and fixing, a plurality of mounting holes 33 provided on the mounting portion 32, and a rubber-coated block 34 formed inside the sleeve 2 for wrapping and fixing the terminal 1 and the elastic rigid clip 5.

[0027] In summary, during assembly, the elastic steel clip 5 is first fitted onto the terminal 1, and the first retaining ring groove 11 on the terminal 1 enables quick locking and connection of the elastic steel clip 5. Next, the terminal 1 with the elastic steel clip 5 fitted onto it is inserted into the insertion hole 21 of the rubber sleeve 2. The elastic steel clip 5, along with the terminal 1, is inserted into the insertion hole 21 of the rubber sleeve 2 and engages with the first inner protruding ring 22 in a reverse-locking manner, thus installing the terminal 1 inside the rubber sleeve 2. Furthermore, after all terminals 1 are installed into the insertion holes 21 of the rubber sleeve 2, the rubber sleeve 2 is transferred to an injection mold. A shell 3 is formed on the outside of the rubber sleeve 2 through in-mold injection molding, and a rubber-coated block 34 is formed at the front end of the insertion hole 21 of the rubber sleeve 2. The rubber-coated block 34 wraps around the elastic steel clip 5, fixing the elastic steel clip 5 and the terminal 1 inside the insertion hole 21, achieving sealing and fixation.

[0028] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A plug terminal structure that is easy to install but difficult to remove, comprising a terminal (1), a rubber sleeve (2), and a housing (3), characterized in that: The tail of the terminal (1) is riveted to the wire (4). An elastic steel clip (5) is fitted on the terminal (1). By inserting the front end of the terminal (1) into the insertion hole (21) of the rubber sleeve (2), the elastic steel clip (5) is used to fix the terminal. The rubber sleeve (2) is placed into the mold, and the housing (3) is formed by injection molding, thereby fixing the terminal (1) to the rubber sleeve (2) and the housing (3).

2. The plug terminal structure according to claim 1, characterized in that: The elastic rigid clamp (5) is a conical ring, and the side wall of the conical ring is provided with a groove (51) for generating shrinkage deformation.

3. The plug terminal structure according to claim 2, characterized in that: The terminal (1) is provided with a first retaining ring groove (11) for mounting the elastic steel clip (5), and the front end of the first retaining ring groove (11) is provided with a first cone (12) to facilitate the mounting of the elastic steel clip (5).

4. The plug terminal structure according to claim 1, characterized in that: The terminal (1) has a connection hole (13) for inserting a wire (4) at its rear end, and a detection hole (14) for vertically communicating with the connection hole (13) is also provided on the outer wall of the terminal (1).

5. The plug terminal structure according to claim 1, characterized in that: The sleeve (2) is provided with a plurality of insertion holes (21) for inserting terminals (1), and the inner wall of the insertion hole (21) is provided with a first inner protruding ring (22) for locking the terminal (1).

6. The plug terminal structure according to claim 5, characterized in that: The outer wall of the rubber sleeve (2) has an outer groove (23) for fixing to the housing (3), and after the housing (3) is integrally injection molded, its inner wall is formed with a second inner protruding ring (30) that matches and is positioned with the outer groove (23).

7. A plug terminal structure that is easy to install but difficult to remove according to any one of claims 1-6, characterized in that: The housing (3) includes a sleeve portion (31) integrally injection molded on the outer wall of the sleeve (2), a mounting portion (32) formed on the outer wall of the sleeve portion (31) for docking and fixing, a plurality of mounting holes (33) provided on the mounting portion (32), and a rubber-coated block (34) formed inside the sleeve (2) for wrapping and fixing the terminal (1) and the elastic rigid clip (5).

Images