A wire locking plug

Abstract

The utility model relates to the technical field of plug, specifically relate to a lock wire plug, include: plug main part, the one end of plug main part is provided with the wiring end for inserting cable, locking portion, locking portion and wiring end butt joint along the axial direction, and have the structure of elastic deformation, fixed portion, fixed portion is set in the outer periphery of wiring end and locking portion, and the inner wall of fixed portion and the outer wall of plug main part are through the screw thread structure and are screwed, when fixed portion is relative to plug main part and is screwed tightly, fixed portion moves along the axial direction, and the locking portion is oppressed, makes locking portion produce radial contraction's elastic deformation, makes the cable outer periphery that inserts in the inside of wiring end and is pressed tightly, realizes the fastening and locking of cable.

Description

Technical Field

[0001] This utility model relates to the field of plug technology, and in particular to a locking plug. Background Technology

[0002] In the field of electrical connections, the locking plug is a key component for connecting wires to electrical equipment, and its performance directly affects the safety and reliability of the entire electrical system. Traditional locking methods, over long-term application, have gradually revealed many problems that seriously affect the quality of electrical connections and the normal operation of equipment, mainly manifested in two aspects: easy loosening and poor sealing.

[0003] Traditional locking plugs mostly use simple threaded fastening or elastic snap-fit ​​structures to lock the wire. Taking the threaded fastening method as an example, it usually relies on rotating the threaded sleeve to clamp the wire, making the wire and the conductive parts inside the plug in close contact. However, during long-term use, this structure will gradually loosen due to factors such as vibration during equipment operation, frequent plugging and unplugging of the wire, and temperature changes. In addition, although the elastic snap-fit ​​structure is easy to install, its elastic element is prone to fatigue deformation after long-term use. When the elasticity of the snap-fit ​​weakens, the clamping force on the wire will be insufficient. When the wire is pulled by external force or vibrates the equipment, it can easily fall off the plug, causing the electrical connection to be interrupted and affecting the normal operation of the equipment.

[0004] Traditional lock-lock plugs often have several shortcomings in their sealing design. Some plugs use only a simple rubber ring to seal the wire between the outer shell and the plug. While this method may provide some initial sealing, the rubber ring loses its elasticity due to aging and wear over time, leading to a decline in sealing performance. Furthermore, the sealing structure of some traditional lock-lock plugs does not consider the dynamic sealing problem between the wire and the plug. When the wire is subjected to external force pulling or bending inside the plug, relative displacement occurs between the wire and the rubber ring. This displacement can disrupt the sealing interface, allowing moisture, dust, and other impurities to easily enter the plug and damage the electrical connection.

[0005] Therefore, this application develops a locking plug to solve the problems existing in the prior art. Utility Model Content

[0006] The purpose of this invention is to provide a locking plug to solve the problem of plugs easily becoming loose during wiring in the prior art.

[0007] The technical solution of this utility model is: a locking plug, comprising: The plug body has a terminal for inserting a cable at one end; A locking part, which is axially connected to the terminal block and has a structure that allows for elastic deformation; A fixing part is sleeved on the outer periphery of the terminal and the locking part, and the inner wall of the fixing part is screwed to the outer wall of the plug body through a threaded structure. When the fixing part is tightened relative to the plug body, the fixing part moves axially and presses the locking part, causing the locking part to undergo radial contraction elastic deformation, which presses the outer periphery of the cable inserted inside the terminal, thereby achieving cable fastening and locking.

[0008] Preferably, the inner wall surface of the fixing part is provided with an inwardly protruding abutment at one end away from the plug body, and the locking part is disposed between the abutment and the terminal. When the fixing part is tightened, the axial distance between the abutment and the adjacent two end faces of the terminal is less than the natural length of the locking part, thereby causing the locking part to be subjected to axial compression and radial deformation.

[0009] Preferably, a limiting part is provided on the outer side of the terminal block, one end of the limiting part abuts against the plug body, and the other end face of the limiting part is flush with the end face of the terminal block near the locking part, for limiting the axial movement of the locking part.

[0010] Preferably, when the fixing part is tightened, the end face of the wiring terminal and the end face of the limiting part near the locking part are tightly fitted together with the end face of the locking part near the plug body.

[0011] Preferably, a sealing ring is provided between the inner wall of the fixing part and the outer wall of the terminal, the sealing ring being located at the end of the fixing part away from its abutment part, for achieving a seal between the fixing part and the terminal.

[0012] Preferably, the inner diameter of the locking part in its natural state is 23mm to 25mm, and the inner diameter of the terminal is 20mm to 21mm, to accommodate different cable diameters.

[0013] Compared with the prior art, the advantages of this utility model are: (1) By radially contracting and pressing the cable through the locking part, a uniform and strong pressure is provided, avoiding cable loosening caused by uneven pressure in the traditional method, improving locking reliability and stability. At the same time, a limiting part and the wiring end are provided to fit tightly with the end face of the locking part, forming a stable support and constraint structure, effectively limiting the movement of the locking part, making the radial pressure more uniform and stable. (2) When installing, insert the cable into the terminal and tighten the fixing part to lock it. When disassembling, rotate the fixing part in the opposite direction to loosen the pressure and take out the cable, which improves work efficiency and reduces operation time and labor costs. (3) A sealing ring is provided between the inner wall of the fixing part and the outer wall of the terminal. After the fixing part is tightened, the sealing ring is elastically deformed under compression to fill the gap, thereby achieving a reliable seal, preventing liquid from damaging the internal components, extending the service life of the plug, and ensuring that the equipment works normally in harsh environments. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an exploded view of the locking plug described in this utility model; Figure 2 This is a perspective view of a locking plug according to the present invention; Figure 3 This is a cross-sectional view of a locking plug according to the present invention.

[0015] The components include: 1. plug body; 11. terminal; 2. locking part; 3. fixing part; 31. abutting part; 4. limiting part; 5. sealing ring. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments: like Figures 1-3 As shown, a locking plug includes a plug body 1, a locking part 2, and a fixing part 3. One end of the plug body 1 has a terminal 11 for inserting a cable. The locking part 2 is axially aligned with the terminal 11 and has an elastic deformation structure, allowing it to deform under external force and return to its original shape after the force is removed. The fixing part 3 is fitted around the terminal 11 and the locking part 2, forming a surrounding structure. The inner wall of the fixing part 3 is screwed onto the outer wall of the plug body 1 via threads. The end of the inner wall of the fixing part 3 away from the plug body 1 has an inwardly protruding abutment part 31. When locking the cable inserted into the terminal 11, the fixing part 3 is simply screwed onto the plug body 1. During the tightening process, due to the threaded structure, the fixing part 3 moves axially, and as it moves, the abutment part 31 on its inner wall gradually approaches the terminal 11. When the fixing part 3 is tightened to a certain extent, the axial distance between the abutting part 31 and the adjacent end faces of the terminal 11 is less than the natural length of the locking part 2. At this time, the locking part 2 is subjected to axial compression by the abutting part 31 and the terminal 11. Under the action of axial pressure, the axial length of the locking part 2 is shortened, and the outer wall of the locking part 2 is in contact with the inner wall of the fixing part 3. Therefore, when the axial length of the locking part 2 is shortened, it can only undergo radial contraction elastic deformation, which reduces the inner diameter of the locking part 2, thereby pressing on the outer periphery of the cable inserted into the terminal 11, thereby achieving the fastening and locking of the cable and ensuring a stable and reliable electrical connection between the cable and the plug.

[0017] Furthermore, the radial contraction of the locking part 2 to compress the cable provides uniform and strong pressure, avoiding the cable loosening problem caused by uneven pressure in traditional cable locking methods. This greatly improves the reliability and stability of cable locking. When installing the cable, simply insert the cable into the terminal 11 and tighten the fixing part 3 to complete the locking operation. When it is necessary to remove the cable, simply rotate the fixing part 3 in the opposite direction to release the pressure on the locking part 2, and the cable can be easily removed. This convenient installation and removal method greatly improves work efficiency and reduces operation time and labor costs.

[0018] In this embodiment, as Figure 3 As shown, a limiting part 4 is also provided, which is sleeved on the outer side of the terminal 11. One end of the limiting part 4 is tightly abutted against the plug body 1, serving to fix and position it. The other end face is flush with the end face of the terminal 11 near the locking part 2. When the fixing part 3 is tightened, the end faces of the terminal 11 and the limiting part 4 near the locking part 2 will be tightly fitted together with the end face of the locking part 2 near the plug body 1, forming a stable support and constraint structure. This structure can effectively limit the movement of the locking part 2 in all directions, making the radial pressure applied by the locking part 2 to the cable more uniform and stable.

[0019] If there is no limit to the position 4, even after the fixing part 3 is locked, the terminal 11 can support and limit the locking part 2, but its end face does not completely cover the end face of the locking part 2. As a result, when the locking part 2 deforms, its deformation direction is uncertain, which makes it impossible to effectively lock the cable. When the equipment is subjected to external forces such as vibration and impact during operation, the cable may become loose or displaced, resulting in problems such as poor contact, signal interference or equipment failure.

[0020] Furthermore, a sealing ring 5 is provided between the inner wall of the fixing part 3 and the outer wall of the terminal 11. The sealing ring 5 is located at the end of the fixing part 3 away from the abutment part 31. An annular groove for placing the sealing ring 5 is provided on the outer wall of the terminal 11. When the fixing part 3 is tightened in place, the sealing ring 5 undergoes elastic deformation under the squeezing action of the fixing part 3 and the terminal 11, tightly filling the gap between them. This achieves a reliable seal between the fixing part 3 and the terminal 11, preventing liquid from causing corrosion, short circuits, or other damage to internal components such as the locking part 2 and cable connection points, extending the service life of the plug, and ensuring that the equipment can work normally in various harsh environments.

[0021] In this embodiment, the inner diameter of the connector 11 is set to 20mm to 21mm. Its internal space is adapted to the cable to be inserted, providing a stable and accurate insertion channel for cables of different diameters. This ensures that the cable can be smoothly and accurately inserted into the appropriate position. In its natural state, the inner diameter of the locking part 2 is 23mm to 25mm, which is larger than the inner diameter of the connector 11, providing a spacious channel for cable insertion. When the operator inserts the cable into the connector 11, there is no need to worry about the cable getting stuck or excessive friction between the cable and the locking part 2. The cable can be easily and quickly inserted into the designated position, greatly improving installation efficiency and reducing time wastage and operational errors caused by difficulties in cable insertion during the installation process.

[0022] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A locking plug, characterized in that, include: The plug body (1) has a terminal (11) for inserting a cable at one end. The locking part (2) is axially connected to the terminal (11) and has an elastically deformable structure; The fixing part (3) is sleeved on the outer periphery of the terminal (11) and the locking part (2), and the inner wall of the fixing part (3) is screwed to the outer wall of the plug body (1) by a threaded structure. When the fixing part (3) is tightened relative to the plug body (1), the fixing part (3) moves axially and presses the locking part (2), causing the locking part (2) to undergo radial contraction elastic deformation, thereby pressing the outer periphery of the cable inserted into the terminal (11) to achieve cable fastening and locking.

2. A locking plug according to claim 1, characterized in that: The inner wall of the fixing part (3) is provided with an inwardly protruding abutment part (31) at one end away from the plug body (1). The locking part (2) is located between the abutment part (31) and the terminal (11). When the fixing part (3) is tightened, the axial distance between the abutment part (31) and the adjacent end faces of the terminal (11) is less than the natural length of the locking part (2), thereby causing the locking part (2) to be axially compressed and produce radial deformation.

3. A locking plug according to claim 1, characterized in that: A limiting part (4) is sleeved on the outside of the terminal (11). One end of the limiting part (4) abuts against the plug body (1), and the other end face of the limiting part (4) is flush with the end face of the terminal (11) near the locking part (2), which is used to limit the axial movement of the locking part (2).

4. A locking plug according to claim 3, characterized in that: When the fixing part (3) is tightened, the end face of the terminal (11) and the end face of the limiting part (4) near the end of the locking part (2) are closely fitted together with the end face of the locking part (2) near the end of the plug body (1).

5. A locking plug according to claim 1, characterized in that: A sealing ring (5) is provided between the inner wall of the fixing part (3) and the outer wall of the terminal (11). The sealing ring (5) is located at one end of the fixing part (3) away from its abutment part (31) and is used to achieve a seal between the fixing part (3) and the terminal (11).

6. A locking plug according to claim 1, characterized in that: The inner diameter of the locking part (2) in its natural state is 23mm to 25mm, and the inner diameter of the terminal (11) is 20mm to 21mm, to accommodate different cable diameters.

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