Self-tapping screw capable of being screwed stably

By designing a nut unit and a protective unit on the self-tapping screw, the problems of stripping and dust and impurities entering during self-tapping screw disassembly are solved, achieving stable engagement and convenient disassembly.

CN223447413UActive Publication Date: 2025-10-17HUIZHOU HUIYANG JINGYI IND CO LTD
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Patent Information

Application Number
CN202423165280.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-21
Publication Date
2025-10-17
Estimated Expiration
2034-12-21

AI Technical Summary

Technical Problem

Existing self-tapping screws are prone to stripping during disassembly, and impurities or dust can easily fall into the rotating slot, making disassembly difficult or even impossible.

Method used

A self-tapping screw comprising a screw rod, a nut unit, and a protective unit is designed. The nut unit is equipped with a protective unit, which includes a top plate, a mounting sleeve, a protective block, and a locking block. By pressing the top plate, the mounting sleeve is inserted into the mounting groove, the protective block is inserted into the rotating groove, and the locking block is engaged in the locking groove to prevent dust and impurities from entering. At the same time, disassembly grooves are provided on the top plate and the protective block to facilitate disassembly.

Benefits of technology

This design ensures that the self-tapping screws are less prone to stripping during disassembly, protects the rotating groove from dust and impurities, simplifies the disassembly process, and guarantees that the self-tapping screws can be removed smoothly.

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Abstract

The utility model discloses a self-tapping screw capable of being screwed stably, and relates to the field of self-tapping screws. The self-tapping screw comprises a screw rod and a nut unit, the nut unit is arranged above the screw rod, a protection unit is arranged on the nut unit, the nut unit comprises a connecting disc and a nut, the connecting disc is fixedly connected to the top of the screw rod, the nut is fixedly connected to the connecting disc, and the protection unit comprises a top disc, a mounting sleeve, a protection block and a clamping block. The mounting sleeve is fixedly connected to the bottom of the top disc, the protection block is arranged on the inner side of the mounting sleeve, and the clamping block is fixedly connected to the outer side of the mounting sleeve. According to the self-tapping screw, the dismounting grooves are formed in the top disc and the protection block, so that a tool can be inserted into the dismounting grooves for dismounting firstly, when the dismounting grooves are difficult to dismount, the protection block can be taken out from the rotating groove, and then the tool is inserted into the rotating groove for dismounting, so that the self-tapping screw is not prone to thread loosening during dismounting, and dismounting of the self-tapping screw is facilitated.
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