Ultramicro surface-mounted welding rectangular electric connector

Abstract

The utility model discloses an ultramicro surface-mounted welding rectangular electric connector, which comprises a base, a stranded wire contact pin, a sleeve and a micro-strip sheet, the micro-strip sheet is welded on the sleeve, and the stranded wire contact pin is in point-and-mortise connection with the sleeve through the crimping pliers; the stranded wire contact pin, the sleeve and the microstrip piece form a contact pin assembly, and the contact pin assembly is installed in the base and fixed through DG-4 epoxy resin glue. According to the utility model, the connection between the sleeve and the soldering lug is more reliable, and a punch forming processing technology is adopted, so that parts are easier to process. According to the appearance design of the electric connector, the appearance of a product is greatly reduced, and the damage of the contact pin assembly caused by deviation when the product is inserted is avoided; according to the utility model, the boss structure is designed in the inner hole of the base, and the boss is clamped on the end face of the sleeve by utilizing the structural characteristic that the outer diameter of the crimping part of the stranded wire pin is small, so that the influence of separating force generated during insertion on the pin assembly is resisted.

Description

Technical Field

[0001] This utility model relates to an ultra-miniature surface-mount rectangular electrical connector, belonging to the field of low-frequency electrical connector technology. Background Technology

[0002] Miniaturization of the entire system not only enables the device to achieve multifunctionality and portability, but also significantly reduces material costs, transportation costs, and energy consumption. This is especially true for aerospace products, where it can drastically reduce launch costs. Miniaturization and micro-miniaturization of components are prerequisites for overall system miniaturization. Only by using miniaturized components and smaller connectors can high-density installation be achieved, saving more space and meeting the requirements of limited spaces.

[0003] Connectors are needed for transmission between printed circuit boards (PCBs) for both connection and output. With the miniaturization requirements of PCBs, the connectors installed on them also need to be miniaturized. That is, the reliability of the connection needs to be ensured while the size of the connector needs to be reduced to the extreme, so as to save more space. Therefore, it is necessary to design and produce an ultra-miniaturized connector. Utility Model Content

[0004] The purpose of this invention is to provide an ultra-miniature surface-mount rectangular electrical connector to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An ultra-miniature surface-mount rectangular electrical connector includes a base, stranded pins, a sleeve, and a microstrip piece; the microstrip piece is soldered onto the sleeve, and the stranded pins are connected to the sleeve by crimping pliers; the stranded pins, sleeve, and microstrip piece form a pin assembly, which is installed in the base and fixed with DG-4 epoxy resin adhesive.

[0007] The microstrip sheet is designed with a "Z" shaped structure and is manufactured using a stamping process.

[0008] The microstrip is positioned using a special fixture to ensure its position accuracy, and is then connected to the sleeve as a single unit using laser spot welding.

[0009] The base is made of polyphenylene sulfide polymer engineering plastic.

[0010] The base has an added boss structure to fix the pin assembly and prevent the pin assembly from moving during the insertion process.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the solder pad component of the electrical connector of this utility model is designed in a "Z" shape, positioned by a special fixture, and connected to the sleeve by laser spot welding process, making the connection between the sleeve and the solder pad more reliable. The stamping forming process makes the parts easier to process.

[0012] This utility model of an electrical connector features a design that minimizes the product's size and shape. It utilizes high-strength, high-toughness polyphenylene sulfide (PPS) engineering plastic and incorporates guide holes to prevent damage to the pin assembly due to misalignment during mating. Instead of traditional screw attachments, the connector is secured to the printed circuit board using adhesive. Regarding the pin assembly fixing structure, considering the reduced size and the inadequacy of epoxy resin fixation at the tail end for ensuring pin assembly stability during mating, a boss structure is designed within the base's inner hole. Leveraging the small outer diameter of the stranded pin crimping portion, the boss engages with the sleeve end face, mitigating the impact of separation forces during mating on the pin assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the ultra-micro surface-mount rectangular electrical connector structure of this utility model;

[0014] In the diagram: 1-base; 2-stranded pin; 3-sleeve; 4-microstrip plate. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0016] An ultra-miniature surface-mount rectangular electrical connector includes a base 1, stranded pins 2, a sleeve 3, and a microstrip sheet 4. The microstrip sheet 4 is welded to the sleeve 3 by laser spot welding. The stranded pins 2 and the sleeve 3 are connected by crimping pliers. The stranded pins 2, the sleeve 3, and the microstrip sheet 4 form a pin assembly. The pin assembly is installed in the base 1 and fixed with DG-4 epoxy resin adhesive.

[0017] The microstrip sheet 4 is designed with a "Z" shape and is manufactured using a stamping process to solve processing challenges and meet the requirements of microstrip sheet label bonding. The microstrip sheet 4 is positioned using a special fixture to ensure its positional accuracy, and laser spot welding is used to connect it to the sleeve 3 as a single unit. The weld joint has high temperature resistance, eliminating the influence of heating temperature on the subsequent surface bonding process.

[0018] The base 1 is made of polyphenylene sulfide (PPS) polymer engineering plastic, and its size is minimized as much as possible while ensuring structural stability. The inner hole of the base 1 is designed with a boss structure to fix the pin assembly and prevent the pin assembly from moving during the insertion process.

[0019] The preparation method of this utility model is as follows: First, the welding piece and the sleeve are positioned by a special positioning fixture and laser welded to ensure the parallelism between the other end of the welding piece and the sleeve; then, the stranded pin is inserted into the sleeve insertion hole and crimped with crimping pliers; the assembled pin assembly is inserted into the base hole as a whole. During assembly, a fixture should also be used for positioning to ensure that the welding pieces are arranged as a whole and in the same direction; finally, DG-4 epoxy resin is used for potting and baking curing.

[0020] This utility model's connector base is equipped with two guide holes, ensuring that during mating, the guide pin at the socket end is preferentially inserted into the guide hole before the connector socket and pin are mated, effectively protecting the pin from damage during mating. This connector requires no connecting wires, is small in size, and saves installation space. It enables interchangeability of printed circuit boards, reduces unnecessary waste, and can be widely used in printed circuit boards.

[0021] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.

Claims

1. A miniature surface-mount rectangular electrical connector, characterized in that: It includes a base (1), a stranded pin (2), a sleeve (3) and a microstrip piece (4); the microstrip piece (4) is welded to the sleeve (3), and the stranded pin (2) and the sleeve (3) are connected by crimping pliers; the stranded pin (2), the sleeve (3) and the microstrip piece (4) form a pin assembly, which is installed in the base (1) and fixed with DG-4 epoxy resin glue.

2. The ultra-miniature surface-mount rectangular electrical connector according to claim 1, characterized in that: The microstrip sheet (4) is designed with a "Z" shaped structure and is manufactured using a stamping process.

3. A miniature surface-mount rectangular electrical connector according to claim 1 or 2, characterized in that: The microstrip (4) is positioned by a special fixture to ensure its position accuracy, and laser spot welding is used to connect it to the sleeve (3) to form a whole.

4. The ultra-miniature surface-mount rectangular electrical connector according to claim 1, characterized in that: The base (1) is made of polyphenylene sulfide polymer engineering plastic.

5. A miniature surface-mount rectangular electrical connector according to claim 1 or 3, characterized in that: The base (1) has a boss structure added to the inner hole to fix the pin assembly and prevent the pin assembly from moving during the insertion process.

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