A new solderless terminal

Abstract

The utility model relates to a novel welding -free terminal, through PCB pressure joint area from below and above is divided into insertion area, preinsertion area and pressure area in proper order, and insertion area is equipped with the leading portion and takes the chamfered tip portion, can provide accurate orientation for PCB board insertion, and preinsertion area is connected with insertion area naturally through the leading portion, makes PCB board to be able to smoothly from insertion area transition to preinsertion area, and pressure area is located preinsertion area top, and the three synergies build a smooth insertion path, and pressure area and preinsertion area constitute shuttle shape contour, cooperate the transition design of the arc surface of outside wall, in the process of PCB board pressure, this shape design can make pressure force evenly distribute on terminal and PCB board, effectively avoid terminal and PCB board to appear local stress concentration, in addition, pressure area forms fish eye groove through up and down extrusion, and at least two misregistration ribs are arranged inside, further strengthen the connecting strength between terminal and PCB board.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a novel solderless terminal. Background Technology

[0002] Terminals, as core components in electrical connections, are crucial to the stability and reliability of electronic systems. Currently, solderless terminals using crimping are gradually being applied to PCB board connections to replace traditional soldering processes. However, existing solderless terminals suffer from several drawbacks. First, they lack effective initial guiding design, making alignment during PCB board insertion difficult and prone to misalignment and jamming. This not only significantly reduces production efficiency but may also damage PCB plated holes due to improper operation. Second, the crimping area contour design of the terminals has defects, often resulting in uneven distribution of crimping force. Third, the connection strength and fatigue resistance between existing terminals and PCB board holes are poor. When subjected to external vibration, impact, or repeated insertion and removal, the terminals are prone to loosening or even falling off, causing electrical connection interruption. In addition, the contact area between traditional terminals and the inner wall of the plated holes is limited, often forming point or line contacts, resulting in high and unstable contact resistance. This can easily lead to increased signal transmission loss, insufficient current carrying capacity, and overheating, seriously affecting the overall performance of the circuit. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a new type of solderless terminal with precise guidance, high connection strength, stable and reliable structure and excellent electrical connection performance.

[0004] To achieve the above objectives, this utility model employs a novel solderless terminal, comprising a connector mating area and a PCB crimping area connected to each other. A terminal pressing shoulder is provided between the connector mating area and the PCB crimping area. The PCB crimping area is divided into an insertion area, a pre-insertion area, and a pressing area from bottom to top. The insertion area is located at the end of the PCB crimping area and has a guide portion extending from the lower end of the pre-insertion area. The top of the guide portion forms a pointed tip to facilitate PCB board insertion, and the pointed tip has a chamfer. The pre-insertion area is located above the insertion area and is connected to the insertion area through the guide portion. The pressing area is located above the pre-insertion area. The pressing area and the pre-insertion area together form a spindle-shaped profile, and both have a rounded transition on their outer walls. The pressing area forms a fisheye groove by pressing up and down, and the fisheye groove has at least two staggered ribs inside.

[0005] The beneficial effects of the above structure are as follows: the PCB pressing area is divided into an insertion area, a pre-insertion area, and a pressing area from bottom to top. The insertion area is equipped with a guide and a chamfered tip, which provides precise guidance for PCB board insertion and ensures that the PCB board will not deviate during the insertion process. The pre-insertion area is naturally connected to the insertion area through the guide, allowing the PCB board to smoothly transition from the insertion area to the pre-insertion area. The pressing area is located above the pre-insertion area. The three work together to form a smooth insertion path. The pressing area and the pre-insertion area form a spindle-shaped contour, which, combined with the rounded transition design of the outer wall, facilitates the pressing of the PCB board. During the process, this shape design allows the pressing force to be evenly distributed on the terminal and the PCB board, effectively avoiding local stress concentration on the terminal and the PCB board, and reducing the risk of damage due to uneven force. In addition, the pressing area is formed by pressing from the top and bottom to form a fisheye groove, with at least two staggered ribs inside, which further enhances the connection strength between the terminal and the PCB board. The fisheye groove increases the friction between the terminal and the hole wall of the PCB board, making the terminal more firmly fixed after pressing. The staggered ribs act as reinforcing ribs, improving the structural strength of the fisheye groove and preventing it from deforming and being damaged due to long-term repeated insertion and removal or external force.

[0006] This utility model is further configured such that the tip has a four-sided chamfered outer peripheral surface. By providing a four-sided chamfered outer peripheral surface at the tip, the tip exhibits a smooth transition in all directions. This design effectively reduces resistance when inserting the PCB board, allowing operators to insert the terminal into the PCB board more easily and quickly, greatly improving installation efficiency and reducing operational difficulty.

[0007] This invention further features symmetrically distributed staggered ribs. With these symmetrically distributed ribs, when the terminal is subjected to external force, the stress can be evenly distributed in all directions. This stress dispersion effectively prevents localized deformation or damage to the terminal due to excessive stress, thereby improving the structural stability and reliability of the terminal and extending its service life.

[0008] This utility model is further configured with corresponding mating plated holes on the PCB board. The inner walls of the plated holes on the PCB board are covered with copper foil. The four chamfered outer peripheral surfaces of the tip are used to make contact with the copper foil on the PCB board for conduction. This structural configuration allows for a larger contact area at the electrical connection point. Compared to traditional point contact or small-area contact methods, this effectively reduces contact resistance and minimizes signal interference or unstable current transmission caused by poor contact, significantly enhancing the reliability of the electrical connection. Furthermore, the contact method between the four chamfered outer peripheral surfaces and the copper foil inside the plated holes better disperses stress when subjected to vibration or impact, further improving the stability of the connection. Attached Figure Description

[0009] Figure 1This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0010] Figure 2 This is a front view of the overall structure of an embodiment of this utility model.

[0011] Figure 3 This is a schematic diagram of the state of the PCB board not being pressed in according to an embodiment of the present invention.

[0012] Figure 4 This is a cross-sectional schematic diagram of the PCB board after being pressed into the PCB board according to an embodiment of the present invention. Detailed Implementation

[0013] like Figures 1-4 As shown, an embodiment of this utility model provides a novel solderless terminal, including a connector mating area 1 and a PCB crimping area 2 connected to each other. A terminal pressing shoulder 3 is provided between the connector mating area 1 and the PCB crimping area 2. The PCB crimping area 2 is divided into an insertion area 4, a pre-insertion area 5, and a pressing area 6 from bottom to top. The insertion area 4 is located at the end of the PCB crimping area 2 and is provided with a guide portion 41 extending from the lower end of the pre-insertion area 5. The top of the guide portion 41 forms a tip 42 to facilitate the insertion of the PCB board 7. The tip 42 has an outer peripheral surface with four chamfered edges 421. The pre-insertion area 5 is located at the insertion area 6. Above the insertion area 4 and connected to the insertion area 4 via the guide part 41, the pressing area 6 is located above the pre-insertion area 5. The pressing area 6 and the pre-insertion area 5 together form a spindle-shaped outline, and the outer side walls are both transitioned with arc surfaces 8. The pressing area 6 forms a fish-eye groove 61 by pressing up and down. The fish-eye groove 61 is provided with at least two misaligned ribs 62 inside. The misaligned ribs 62 are symmetrically distributed. The PCB board 7 is provided with corresponding plating holes 71 for insertion. The inner wall of the plating holes 71 on the PCB board 7 is covered with copper foil 72. The outer peripheral surface of the four chamfers 421 at the top of the tip 42 is used to contact and conduct with the copper foil 72 on the PCB board 7.

[0014] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model, and the utility model creation is in line with the applicant's actual R&D capabilities and resource conditions.

Claims

1. A novel solderless terminal, characterized in that: The device includes an interconnected connector mating area and a PCB crimping area. A terminal pressing shoulder is provided between the connector mating area and the PCB crimping area. The PCB crimping area is divided into an insertion area, a pre-insertion area, and a pressing area from bottom to top. The insertion area is located at the end of the PCB crimping area and has a guide portion extending from the lower end of the pre-insertion area. The top of the guide portion forms a pointed tip to facilitate PCB board insertion. The pointed tip has a chamfer. The pre-insertion area is located above the insertion area and is connected to the insertion area through the guide portion. The pressing area is located above the pre-insertion area. The pressing area and the pre-insertion area together form a spindle-shaped profile, and both have a rounded transition on their outer walls. The pressing area forms a fisheye groove by pressing up and down. The fisheye groove has at least two staggered ribs inside.

2. The novel solderless terminal according to claim 1, characterized in that: The tip of the tip has a four-sided chamfered outer peripheral surface.

3. The novel solderless terminal according to claim 1, characterized in that: The misaligned reinforcement bars are symmetrically distributed.

4. The novel solderless terminal according to claim 2, characterized in that: The PCB board has corresponding plating holes for insertion. The inner wall of the plating holes on the PCB board is covered with copper foil. The four chamfered outer peripheral surfaces of the tip are used to contact and conduct with the copper foil on the PCB board.

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