CN221900203U - A fisheye terminal - Google Patents

Abstract

The utility model discloses a fisheye terminal, comprising a clamping part, a plug-in part is fixedly arranged at the lower end of the clamping part, and a guide part is arranged at the lower end of the plug-in part, a fisheye groove is provided on the outer surface of one end of the clamping part connected with the plug-in part, the fisheye groove is hexagonal in design, and an arched part is arranged inside the fisheye groove. The fisheye terminal adopts an arched part arranged inside the fisheye groove, and the arched part is used to support the plug-in part after the terminal is inserted into the metallized hole of the printed circuit board, so that the retention force of the fisheye terminal and the PCBA circuit board after assembly is enhanced, and the problem of the fisheye terminal and the PCBA circuit board being easily loosened at the plug-in place to cause poor contact is avoided, and the problems of unstable contact and large contact resistance under the vibration of the connector are ensured. The overall compressive strength of the plug-in part is enhanced by designing the inclined surface inside the fisheye groove, and the untorn structure of the fisheye groove is matched to provide support force for the entire fisheye structure.

Description

A fisheye terminal

Technical Field

The utility model relates to the technical field of fisheye terminals, in particular to a fisheye terminal.

Background Art

Fisheye press-fitting is a metal processing technology widely used in automobile manufacturing, aerospace and other fields. This technology is an alternative solution to welding installation. It mainly realizes reliable connection of electrical contacts through cold connection and solder-free method. The fisheye end is pressed into the PCB hole, and a higher holding force is obtained through a smaller pressing force. During the pressing process, the fisheye end produces elastic deformation and provides a tight connection with low contact impedance and high reliability. In short, Press-Fit creates a solderless electromechanical interconnection, which can quickly install the connector on the PCB module. The elimination of the welding process not only reduces the connection impedance, but also further reduces the production cost and assembly time.

Press-fit technology is a technology for inserting the component connection pin into the metallized hole of the printed circuit board. The Press-fit terminal is in sealed contact with the hole wall and has good conductive characteristics. The diagonal of the Press-fit terminal is larger than the diameter of the metallized hole on the PCB board to achieve elastic interference fit and achieve tight connection. However, after the existing fisheye terminal is inserted into the board hole, it is in the contact form of "single peak contact pressure zone", resulting in the fisheye terminal and the inside of the board hole cannot be fully contacted, the electrical conductivity is low, and the stress relaxation performance is low under high temperature conditions. The fisheye terminal and the PCBA circuit board plug-in are easy to loosen, resulting in poor contact, and may also cause damage to the connector, unstable contact under vibration, high contact resistance and other problems.

Utility Model Content

The utility model aims to provide a fisheye terminal to solve the problem that the fisheye terminal and the PCBA circuit board plug-in portion are easily loosened and thus cause poor contact.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fisheye terminal, comprising a clamping portion, a plug-in portion is fixedly provided at the lower end of the clamping portion, and a guide portion is provided at the lower end of the plug-in portion, a fisheye groove is provided on the outer surface of one end of the clamping portion connected to the plug-in portion, the fisheye groove is hexagonal in design, and the opening area of the end of the fisheye groove facing the inside of the clamping portion is smaller than the opening area of the end of the fisheye groove facing the inside of the clamping portion, and the inner surface of the fisheye groove is an inclined smooth slope design, and a raised portion is provided inside the fisheye groove.

Preferably, the side surface of the clamping portion is provided with continuous wave-shaped protrusions.

By adopting the above technical solution, the wave-shaped protrusions can prevent the robot arm from slipping when grasping the clamping part.

Preferably, the guide portion is designed to be in a prism shape with a larger upper portion and a smaller lower portion, and the edges and corners of the guide portion are all designed to be arc-shaped chamfers.

By adopting the above technical solution, when the guide part contacts the PCB hole, the plug-in part can be aligned with the PCB hole to avoid deviation.

Preferably, a reinforcement portion is fixedly provided on the side surface of the clamping portion where the fisheye groove is located.

By adopting the above technical solution, the position where the clamping part contacts the PCB hole is protected by the reinforcement part, and the harder material of the reinforcement part is used to achieve wear resistance without affecting the elastic deformation of the clamping part with a softer material.

Preferably, the arched portion is designed as a U-shaped thin sheet as a whole, and the two legs of the U-shaped structure are respectively connected to the inner wall of the clamping portion by integral stamping. The side of the U-shaped structure of the arched portion is provided with a concave arc, and there are three arched portions arranged at equal intervals, and two of the arched portions are arranged opposite to the other arched portion, and the adjacent arched portions are oriented in opposite directions.

By adopting the above technical solution, the arched portion can apply a supporting force to the fisheye groove from the inner side by bending and folding, so that the clamping portion can be more stably contacted and engaged with the PCB hole.

Preferably, the reinforcing portion and the clamping portion are integrally formed, and the reinforcing portion as a whole is designed as an isosceles trapezoid, and the connection between the reinforcing portion and the surface of the clamping portion is designed as an arc.

By adopting the above technical solution, the reinforcing part can smoothly transition through the arc-shaped part when inserted into the PCB hole, thereby reducing the resistance encountered by the clamping part when inserted into the PCB hole.

Compared with the prior art, the beneficial effects of the present invention are as follows: the fisheye terminal:

1. The arched part is arranged on the inner side of the fisheye groove, and the arched part is used to support the plug-in part after the terminal is inserted into the metallized hole of the printed circuit board, so that the holding force of the fisheye terminal and the PCBA circuit board after assembly is enhanced, and the problem of looseness at the plug-in point of the fisheye terminal and the PCBA circuit board, which leads to poor contact, is avoided. At the same time, the problem of unstable contact and large contact resistance under connector vibration is avoided;

2. Furthermore, the design of the inclined surface on the inner side of the fisheye groove enhances the overall compressive strength of the plug-in part, and the untorn structure at the arched part of the fisheye groove provides support for the entire fisheye structure, greatly increasing the overall strength of the fisheye terminal.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall three-dimensional structure of the utility model;

Fig. 2 is a schematic diagram of the three-dimensional structure of the A-A section of the utility model;

FIG3 is a schematic diagram of the overall front view structure of the utility model;

FIG. 4 is a schematic diagram of the overall rear view structure of the utility model.

In the figure: 1. Clamping part; 2. Inserting part; 3. Guide part; 4. Fisheye groove; 5. Arched part; 6. Reinforced part.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

Please refer to Figures 1-4. The utility model provides a technical solution: a fisheye terminal, comprising: a clamping part 1, a plug-in part 2 is fixedly arranged at the lower end of the clamping part 1, and a guide part 3 is arranged at the lower end of the plug-in part 2, a fisheye groove 4 is opened on the outer surface of one end of the clamping part 1 connected to the plug-in part 2, the fisheye groove 4 is hexagonal in design, and the opening area of the end of the fisheye groove 4 facing the inside of the clamping part 1 is smaller than the opening area of the end of the fisheye groove 4 facing the inside of the clamping part 1, and the inner side surface of the fisheye groove 4 is an inclined smooth slope design, and an arched part 5 is arranged inside the fisheye groove 4;

The side surface of the clamping portion 1 is provided with continuous wave-shaped protrusions;

The guide portion 3 is designed in a prism shape with a larger top and a smaller bottom, and the edges and corners of the guide portion 3 are all designed with arc chamfers;

During plugging, the clamping end of the manipulator clamps the clamping part 1, and the wavy protrusions on the surface of the clamping part 1 are used to enhance the clamping stability of the fisheye terminal by the clamping end of the manipulator. During plugging, the plug-in part 2 is directly opposite to the PCB hole through the guide part 3, and the end with a smaller diameter of the guide part 3 first contacts the inner surface of the PCB hole, so that the plug-in part 2 can be smoothly docked with the PCB hole, and the clamping part 1 can be deformed evenly.

A reinforcing portion 6 is fixedly provided on the side surface of the clamping portion 1 where the fisheye groove 4 is located;

The arched portion 5 is designed as a U-shaped thin sheet as a whole, and the two legs of the U-shaped structure are respectively connected to the inner wall of the clamping portion 1 by integral stamping, and the side of the U-shaped structure of the arched portion 5 is provided with an inwardly concave arc, and three arched portions 5 are provided at equal intervals, and two of the arched portions 5 are arranged opposite to the other arched portion 5;

The reinforcing portion 6 and the clamping portion 1 are integrally formed, and the reinforcing portion 6 is designed as an isosceles trapezoid as a whole, and the connection between the reinforcing portion 6 and the surface of the clamping portion 1 is designed as an arc;

During the plugging process of the fisheye terminal, when the clamping part 1 is squeezed by the inner surface of the PCB hole, the reinforcing part 6 is compressed to transfer the force to the inside of the fisheye groove 4, and the fisheye groove 4 shrinks inward through the elastic deformation of the arched part 5 until the clamping part 1 is completely inserted into the PCB hole. At this time, the arched part 5 supports the fisheye groove 4 outward so that the reinforcing part 6 can always be supported to maintain the stable fit between the clamping part 1 and the inner surface of the PCB hole, thereby avoiding the problem of loose connection between the fisheye terminal and the PCB hole, which leads to poor contact.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A fisheye terminal, comprising a clamping portion (1), a plug-in portion (2) being fixedly provided at the lower end of the clamping portion (1), and a guide portion (3) being provided at the lower end of the plug-in portion (2), characterized in that a fisheye groove (4) is provided on the outer surface of one end of the clamping portion (1) connected to the plug-in portion (2), the fisheye groove (4) being hexagonal in design, and an opening area of the end of the fisheye groove (4) facing the inside of the clamping portion (1) being smaller than an opening area of the end of the fisheye groove (4) facing the inside of the clamping portion (1), and an inner surface of the fisheye groove (4) being an inclined smooth slope design, and an arched portion (5) being provided inside the fisheye groove (4). 2. A fisheye terminal according to claim 1, characterized in that: the side surface of the clamping portion (1) is provided with continuous wave-shaped protrusions. 3. A fisheye terminal according to claim 1, characterized in that: the guide portion (3) is designed in a prism shape with a larger upper portion and a smaller lower portion, and the edges and corners of the guide portion (3) are all designed in an arc chamfered shape. 4. A fisheye terminal according to claim 1, characterized in that a reinforcing portion (6) is fixedly provided on the side surface of the clamping portion (1) where the fisheye groove (4) is located. 5. The fisheye terminal according to claim 1, characterized in that the arched portion (5) is designed as a U-shaped thin sheet as a whole, and the two legs of the U-shaped structure are respectively connected to the inner wall of the clamping portion (1) by integral stamping. 6. A fisheye terminal according to claim 5, characterized in that the side edge of the U-shaped structure of the arched portion (5) is provided with an inwardly concave arc. 7. A fisheye terminal according to claim 1, characterized in that: three arched portions (5) are arranged at equal intervals, and two of the arched portions (5) are arranged opposite to another arched portion (5), and the directions of adjacent arched portions (5) are opposite. 8. A fisheye terminal according to claim 4, characterized in that: the reinforcing portion (6) and the clamping portion (1) are integrally formed, and the reinforcing portion (6) is designed as an isosceles trapezoid as a whole, and the connection between the reinforcing portion (6) and the clamping portion (1) surface is designed as an arc.