Shell connecting process for connector shielding net

Abstract

The invention discloses a connector shielding net shell connecting process, which belongs to the field of electronic connectors, and comprises the following steps: 1) bottoming and glue filling: bottoming and glue filling are performed on a lead and a base at the tail part of a connector; 2) sleeving a shielding net and a packing ring, wrapping the root of the wire with a plastic film, sleeving the wire with the shielding net, enabling the shielding net to penetrate through the packing ring, folding the end of the shielding net back to wrap the packing ring, and pressing the packing ring and the shielding net into the glue pouring cavity, so that the packing ring is parallel to the upper surface of the glue pouring cavity; (3) potting, wherein a potting cavity at the tail part of the connector is filled with glue for potting; and 4) detection: detecting the electrical connection performance of the connector socket connector and the shielding net. And the section of the piston ring is U-shaped. According to the connector shielding net shell connecting process, the folded shielding net end can be pressed into the U-shaped groove, direct contact with the sharp edge is avoided, and the risk of assembly damage is reduced. The arc-shaped end guides the shielding net to turn back naturally, so that the flatness of the turn-back position is improved, and no air gap exists after glue filling. And the product quality and the qualification rate can be obviously improved.

Description

Technical Field

[0001] The present invention relates to the field of electronic connectors, and specifically to a connector shielding net housing process. Background Art

[0002] In electrical connectors in fields such as high-speed communication and aerospace, reliable housing of the shielding net is the key to ensuring electromagnetic compatibility (EMC). In traditional processes, the shielding net is usually fixed by metal hoops or crimping rings, and there are the following problems: Uneven tension: The ordinary round-section expanding ring has insufficient radial elasticity, which easily leads to poor contact between the shielding net and the housing, and the shielding efficiency of high-frequency signals decreases.

[0003] Assembly damage: The folded-back end of the shielding net is easily scratched by the sharp edges of the expanding ring, causing micro-fractures and possible loosening after long-term vibration.

[0004] Potting defect: When the expanding ring is not parallel to the potting cavity, the colloid is not evenly filled, forming air gaps or stress concentration points.

[0005] There is a lack of a housing process for the connector shielding net in the prior art. Therefore, there is an urgent need for an expanding ring structure that can balance elasticity, assembly reliability, and process friendliness. Summary of the Invention

[0006] The purpose of the present invention is to overcome the difficulties in the above background art and provide a connector shielding net housing process.

[0007] To achieve the above purpose, the technical solution adopted is: A connector shielding net housing process includes the following steps: 1). Primer potting Install the connector in the base, and perform primer potting on the wire at the tail of the connector and the base. 2). Fit the shielding net and the expanding ring Wrap the root of the wire with plastic film, then fit the shielding net, then pass the shielding net through the expanding ring, fold back the end of the shielding net to wrap the expanding ring, and then press the expanding ring and the shielding net into the potting cavity to make the expanding ring parallel to the upper surface of the potting cavity. 3). Encapsulation Apply glue to the potting cavity at the tail of the connector for encapsulation. 4). Detection Detect the electrical connection performance of the connector and the shielding net.

[0008] Further, after the primer potting in step 1), build up glue at the tail of the connector and the base to completely cover the tail end of the connector.

[0009] Further, in step 2), the folded-back length of the shielding net end is greater than 3 mm, and the folded-back section of the shielding net is flat without overlap; after the expansion ring and the shielding net are pressed into the potting cavity, the shielding net wires exposed on the folded head are trimmed neatly and pressed into the potting cavity.

[0010] Further, the expansion ring is made of elastic metal, and the outer diameter size is tightly fitted with the inner wall of the potting cavity; the cross-section of the expansion ring is U-shaped, the arc end faces deep into the potting cavity, and the expansion ring is provided with an elastic margin notch.

[0011] Further, in step 3), after the potting cavity is filled with glue and sealed, the potting surface is piled up with glue to make the glue surface flat and uniform.

[0012] Further, the U-shaped expansion ring has a lower height of the inner ring than that of the outer ring.

[0013] The beneficial effects of adopting the above solution are as follows: This connector shielding net casing process standardizes the operation. By using a U-shaped expansion ring, the folded-back shielding net end can be pressed into the U-shaped groove to avoid direct contact with sharp edges and reduce the risk of assembly damage. The arc end guides the natural folding-back of the shielding net, improving the flatness of the folding-back part and having no air gap after potting. It can significantly improve the product quality and qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram after the installation of the connector shielding net casing process of the present invention is completed.

[0015] Figure 2 It is a schematic structural diagram of the expansion ring in the present invention.

[0016] Figure 3 It is a schematic cross-sectional diagram of the expansion ring in the present invention.

[0017] In the figure, 1, connector housing; 2, bottom potting place; 3, glue piling place; 4, shielding net; 5, expansion ring; 6, glue filling and sealing place. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following combines the specific embodiments of the present invention to clearly and completely describe the technical solutions of the present invention. The described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present invention.

[0019] Embodiment 1 As Figure 1 , a connector shielding net casing process includes the following steps: Before the installation operation, the technical operation specifications and requirements should be well-known, and the tools, the models, colors, and lengths of the connector components should be checked for correctness.

[0020] 1), Primer potting Install the connector in the base, and apply primer potting to the wire at the tail of the connector and the base; as Figure 1 shown in the primer potting area 1.

[0021] After primer potting, apply stacking glue to the tail of the connector and the base to completely cover the tail end of the connector. The wires on both sides of the root of the wire are arranged together, and there is no excess glue on the surface of the base. As Figure 1 shown in the stacking glue area 3.

[0022] After primer potting, measure the wire resistance, and measure the insulation resistance value and withstand voltage of the base and the potting area.

[0023] 2), Install the shielding net and expansion ring Wrap the root of the wire with polytetrafluoroethylene plastic film, with a wrapping length of about 20 mm. Then install the shielding net, and insert the expansion ring through the notch of the expansion ring. Place the shielding net inside the expansion ring, fold back the end of the shielding net to wrap the expansion ring, and then press the expansion ring and the shielding net into the potting cavity with a saw blade or a flat screwdriver to make the expansion ring parallel to the upper surface of the potting cavity. As Figure 1 shown in the position of the shielding net 4 and the expansion ring 5 after installation.

[0024] The expansion ring 5 is made of elastic metal, and the outer diameter dimension is tightly fitted with the inner wall of the potting cavity. The expansion ring 5 is provided with an elastic margin notch.

[0025] The length of the folded-back end of the shielding net is greater than 3 mm, and the folded-back section of the shielding net is flat without overlap. After the expansion ring and the shielding net are pressed into the potting cavity, use a residue-removing pliers to trim the shielding net wires exposed on the fold head neatly, and then press them into the potting cavity with tweezers.

[0026] 3), Potting Apply glue to the potting cavity at the tail of the connector for potting; after potting the potting cavity with glue, apply stacking glue to the potted surface to make the glue surface flat and uniform.

[0027] 4), Testing Test the electrical connection performance of the connector plug and the shielding net. Refer to the standard to measure the wire resistance, and measure the insulation resistance value and withstand voltage value of the shell.

[0028] Example 2 On the basis of Example 1, as Figure 2 and Figure 3 shown, the cross-section of the expansion ring 5 is U-shaped, and the arc end faces deep into the potting cavity. The U-shaped shape of the expansion ring has a lower inner ring height than the outer ring. The folded-back end of the shielding net is pressed into the U-shaped groove without getting disordered. The potting effect is better.

[0029] The U-shaped expansion ring has better elasticity. The arc-end expansion ring can protect the folded-back part of the shielding net. The folded-back part of the shielding net is flatter and easier to operate, improving the product qualification rate.

[0030] Experiment 1: Comparison of shielding mesh contact performance Purpose: To verify the difference in contact resistance and stability between U-shaped expansion ring and traditional expansion ring.

[0031] Method: Two groups of connector samples (20 pieces each) were prepared: Group A (using U-shaped expansion ring) and Group B (using traditional cross-section expansion ring).

[0032] Use a micro-ohmmeter to measure the contact resistance between the shield mesh and the housing, repeat the test after 1000 plug-in and unplug cycles, and record the resistance change rate. Initial resistivity Retest resistivity Rate of change A group U-shaped expansion ring 5.26 mΩ 5.42 mΩ 3% Group B Traditional Section Expanding Ring 8.50 mΩ 9.19 mΩ 8%

[0033] Results: The U-shaped expansion ring can significantly improve the contact performance of the shielding mesh to the shell.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A connector shielding net shell connection process, characterized in that It includes the following steps: 1) Primer potting Install the connector in the base, and apply primer potting to the wires at the tail of the connector and the base; 2) Sheath the shielding net and the expansion ring Wrap the root of the wire with plastic film, then sheath the shielding net, then pass the shielding net through the expansion ring, fold back the end of the shielding net to wrap the expansion ring, and then press the expansion ring and the shielding net into the potting cavity so that the expansion ring is parallel to the upper surface of the potting cavity; 3) Encapsulation Apply glue to the potting cavity at the tail of the connector for encapsulation; 4) Detection Detect the electrical connection performance of the connector plug and the shielding net.

2. The connector shielding net joint shell process according to claim 1, characterized in that: After primer potting in step 1), apply additional glue at the tail of the connector and the base to completely cover the end of the connector.

3. The connector shielding net housing process according to claim 1, characterized in that: In step 2), the length of the folded-back end of the shielding net is greater than 3 mm, and the folded-back section of the shielding net is flat without overlap; after the expansion ring and the shielding net are pressed into the potting cavity, trim the shielding net wires exposed on the folded head neatly and press them into the potting cavity.

4. The connector shielding net housing process according to claim 1, characterized in that: The expansion ring is made of elastic metal, and the outer diameter dimension is tightly fitted with the inner wall of the potting cavity; the cross-section of the expansion ring is U-shaped, the arc end faces deep into the potting cavity, and the expansion ring is provided with an elastic margin notch.

5. The connector shielding net joint shell process according to claim 1, characterized in that: In step 3), after applying glue for encapsulation in the potting cavity, apply additional glue to the encapsulation surface to make the glue surface flat and uniform.

6. The connector shielding net joint housing process according to claim 4, characterized in that: The U-shaped expansion ring has a lower inner ring height than the outer ring.

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