Device solving problems of adsorption difficulty of nut for PCB and tin invasion in internal threads

Abstract

The invention discloses a device solving problems of adsorption difficulty of a nut for a PCB and tin invasion in internal threads. The device comprises plasters, retractable control pieces, positioning pieces and elastic pieces that are arranged in the plasters, wherein the plaster is internally provided with an internal groove, the side wall of the plaster is provided with a positioning piece guide hole communicated with the internal groove, the positioning piece comprises a slide block and a positioning rod, the positioning rod of the positioning piece extends out of the side wall of the plaster through the positioning piece guide hole, the retractable control piece is arranged in the internal groove through the guide hole in the plaster, the retractable control piece comprises a retractable control block, and the positioning piece is matched with the retractable control block through the slide block. The lower bottom surface is blocked by a plaster bottom sheet of the plaster, soldering tin cannot permeate into threads of the screw hole, so that a screw can be screwed into the nut normally; when the screw is screwed into the nut, a guide rod retracts from a column surface of aplaster cylinder, the plaster is ejected out the screw hole and is recycled. The whole process solves two problems that a sucker cannot be adsorbed and tin permeates into the threads.

Description

technical field [0001] The invention relates to the field of server PCB boards, in particular to a device for solving the problem of difficult adsorption of nuts used for PCB boards and the problems of tin ingress in internal teeth. Background technique [0002] In the field of PCBA (printed circuit board assembly) boards, other circuit boards or protective covers need to be installed on the circuit board. A common way is to weld a cylindrical nut in the corresponding position or in the corresponding hole by soldering , the external shape of a commonly used nut is step-shaped (instructions attached Figure 8 As shown) solder is applied on the cylindrical surface of the lower step, and then the device to be fixed is fixed on the nut with a screw, and the positioning and welding quality of the nut are very important. The components cannot be fixed accurately; if the quality of the nut is not fixed, for example, the thread of the nut enters the tin (the melted solder enters the...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the above-mentioned deficiencies in the prior art, and provides a device that solves the problem of difficult adsorption of nuts for PCB boards and the problem of tin entering the inner teeth, and pushes down the guide rod of the telescopic control member to make the inner shrinkage groove of the telescopic control block Cooperate with the slider of the positioning piece, the positioning rod retracts into the plugging round table, inserts the plugging plug from the bottom of the nut, the plugging round table extends into the screw hole, the plugging cone is attached to the threaded opening of the lower part of the nut, and the plugging film is attached on the underside of the nut

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